Merge 4.14.24 into android-4.14

[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / drivers / net / ethernet / intel / i40e / i40e_main.c

/*******************************************************************************
 *
 * Intel Ethernet Controller XL710 Family Linux Driver
 * Copyright(c) 2013 - 2017 Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * The full GNU General Public License is included in this distribution in
 * the file called "COPYING".
 *
 * Contact Information:
 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 ******************************************************************************/

#include <linux/etherdevice.h>
#include <linux/of_net.h>
#include <linux/pci.h>
#include <linux/bpf.h>

/* Local includes */
#include "i40e.h"
#include "i40e_diag.h"
#include <net/udp_tunnel.h>
/* All i40e tracepoints are defined by the include below, which
 * must be included exactly once across the whole kernel with
 * CREATE_TRACE_POINTS defined
 */
#define CREATE_TRACE_POINTS
#include "i40e_trace.h"

const char i40e_driver_name[] = "i40e";
static const char i40e_driver_string[] =
                        "Intel(R) Ethernet Connection XL710 Network Driver";

#define DRV_KERN "-k"

#define DRV_VERSION_MAJOR 2
#define DRV_VERSION_MINOR 1
#define DRV_VERSION_BUILD 14
#define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
             __stringify(DRV_VERSION_MINOR) "." \
             __stringify(DRV_VERSION_BUILD)    DRV_KERN
const char i40e_driver_version_str[] = DRV_VERSION;
static const char i40e_copyright[] = "Copyright (c) 2013 - 2014 Intel Corporation.";

/* a bit of forward declarations */
static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired);
static int i40e_add_vsi(struct i40e_vsi *vsi);
static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
static int i40e_setup_misc_vector(struct i40e_pf *pf);
static void i40e_determine_queue_usage(struct i40e_pf *pf);
static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
static void i40e_prep_for_reset(struct i40e_pf *pf, bool lock_acquired);
static int i40e_reset(struct i40e_pf *pf);
static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired);
static void i40e_fdir_sb_setup(struct i40e_pf *pf);
static int i40e_veb_get_bw_info(struct i40e_veb *veb);

/* i40e_pci_tbl - PCI Device ID Table
 *
 * Last entry must be all 0s
 *
 * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
 *   Class, Class Mask, private data (not used) }
 */
static const struct pci_device_id i40e_pci_tbl[] = {
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_A), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_C), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T4), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_1G_BASE_T_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_I_X722), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2_A), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_B), 0},
        {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_SFP28), 0},
        /* required last entry */
        {0, }
};
MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);

#define I40E_MAX_VF_COUNT 128
static int debug = -1;
module_param(debug, uint, 0);
MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all), Debug mask (0x8XXXXXXX)");

MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);

static struct workqueue_struct *i40e_wq;

/**
 * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 * @alignment: what to align the allocation to
 **/
int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
                            u64 size, u32 alignment)
{
        struct i40e_pf *pf = (struct i40e_pf *)hw->back;

        mem->size = ALIGN(size, alignment);
        mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
                                      &mem->pa, GFP_KERNEL);
        if (!mem->va)
                return -ENOMEM;

        return 0;
}

/**
 * i40e_free_dma_mem_d - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
{
        struct i40e_pf *pf = (struct i40e_pf *)hw->back;

        dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
        mem->va = NULL;
        mem->pa = 0;
        mem->size = 0;

        return 0;
}

/**
 * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to fill out
 * @size: size of memory requested
 **/
int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
                             u32 size)
{
        mem->size = size;
        mem->va = kzalloc(size, GFP_KERNEL);

        if (!mem->va)
                return -ENOMEM;

        return 0;
}

/**
 * i40e_free_virt_mem_d - OS specific memory free for shared code
 * @hw:   pointer to the HW structure
 * @mem:  ptr to mem struct to free
 **/
int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
{
        /* it's ok to kfree a NULL pointer */
        kfree(mem->va);
        mem->va = NULL;
        mem->size = 0;

        return 0;
}

/**
 * i40e_get_lump - find a lump of free generic resource
 * @pf: board private structure
 * @pile: the pile of resource to search
 * @needed: the number of items needed
 * @id: an owner id to stick on the items assigned
 *
 * Returns the base item index of the lump, or negative for error
 *
 * The search_hint trick and lack of advanced fit-finding only work
 * because we're highly likely to have all the same size lump requests.
 * Linear search time and any fragmentation should be minimal.
 **/
static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
                         u16 needed, u16 id)
{
        int ret = -ENOMEM;
        int i, j;

        if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
                dev_info(&pf->pdev->dev,
                         "param err: pile=%p needed=%d id=0x%04x\n",
                         pile, needed, id);
                return -EINVAL;
        }

        /* start the linear search with an imperfect hint */
        i = pile->search_hint;
        while (i < pile->num_entries) {
                /* skip already allocated entries */
                if (pile->list[i] & I40E_PILE_VALID_BIT) {
                        i++;
                        continue;
                }

                /* do we have enough in this lump? */
                for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
                        if (pile->list[i+j] & I40E_PILE_VALID_BIT)
                                break;
                }

                if (j == needed) {
                        /* there was enough, so assign it to the requestor */
                        for (j = 0; j < needed; j++)
                                pile->list[i+j] = id | I40E_PILE_VALID_BIT;
                        ret = i;
                        pile->search_hint = i + j;
                        break;
                }

                /* not enough, so skip over it and continue looking */
                i += j;
        }

        return ret;
}

/**
 * i40e_put_lump - return a lump of generic resource
 * @pile: the pile of resource to search
 * @index: the base item index
 * @id: the owner id of the items assigned
 *
 * Returns the count of items in the lump
 **/
static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
{
        int valid_id = (id | I40E_PILE_VALID_BIT);
        int count = 0;
        int i;

        if (!pile || index >= pile->num_entries)
                return -EINVAL;

        for (i = index;
             i < pile->num_entries && pile->list[i] == valid_id;
             i++) {
                pile->list[i] = 0;
                count++;
        }

        if (count && index < pile->search_hint)
                pile->search_hint = index;

        return count;
}

/**
 * i40e_find_vsi_from_id - searches for the vsi with the given id
 * @pf - the pf structure to search for the vsi
 * @id - id of the vsi it is searching for
 **/
struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id)
{
        int i;

        for (i = 0; i < pf->num_alloc_vsi; i++)
                if (pf->vsi[i] && (pf->vsi[i]->id == id))
                        return pf->vsi[i];

        return NULL;
}

/**
 * i40e_service_event_schedule - Schedule the service task to wake up
 * @pf: board private structure
 *
 * If not already scheduled, this puts the task into the work queue
 **/
void i40e_service_event_schedule(struct i40e_pf *pf)
{
        if (!test_bit(__I40E_DOWN, pf->state) &&
            !test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                queue_work(i40e_wq, &pf->service_task);
}

/**
 * i40e_tx_timeout - Respond to a Tx Hang
 * @netdev: network interface device structure
 *
 * If any port has noticed a Tx timeout, it is likely that the whole
 * device is munged, not just the one netdev port, so go for the full
 * reset.
 **/
static void i40e_tx_timeout(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_ring *tx_ring = NULL;
        unsigned int i, hung_queue = 0;
        u32 head, val;

        pf->tx_timeout_count++;

        /* find the stopped queue the same way the stack does */
        for (i = 0; i < netdev->num_tx_queues; i++) {
                struct netdev_queue *q;
                unsigned long trans_start;

                q = netdev_get_tx_queue(netdev, i);
                trans_start = q->trans_start;
                if (netif_xmit_stopped(q) &&
                    time_after(jiffies,
                               (trans_start + netdev->watchdog_timeo))) {
                        hung_queue = i;
                        break;
                }
        }

        if (i == netdev->num_tx_queues) {
                netdev_info(netdev, "tx_timeout: no netdev hung queue found\n");
        } else {
                /* now that we have an index, find the tx_ring struct */
                for (i = 0; i < vsi->num_queue_pairs; i++) {
                        if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
                                if (hung_queue ==
                                    vsi->tx_rings[i]->queue_index) {
                                        tx_ring = vsi->tx_rings[i];
                                        break;
                                }
                        }
                }
        }

        if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
                pf->tx_timeout_recovery_level = 1;  /* reset after some time */
        else if (time_before(jiffies,
                      (pf->tx_timeout_last_recovery + netdev->watchdog_timeo)))
                return;   /* don't do any new action before the next timeout */

        if (tx_ring) {
                head = i40e_get_head(tx_ring);
                /* Read interrupt register */
                if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                        val = rd32(&pf->hw,
                             I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
                                                tx_ring->vsi->base_vector - 1));
                else
                        val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);

                netdev_info(netdev, "tx_timeout: VSI_seid: %d, Q %d, NTC: 0x%x, HWB: 0x%x, NTU: 0x%x, TAIL: 0x%x, INT: 0x%x\n",
                            vsi->seid, hung_queue, tx_ring->next_to_clean,
                            head, tx_ring->next_to_use,
                            readl(tx_ring->tail), val);
        }

        pf->tx_timeout_last_recovery = jiffies;
        netdev_info(netdev, "tx_timeout recovery level %d, hung_queue %d\n",
                    pf->tx_timeout_recovery_level, hung_queue);

        switch (pf->tx_timeout_recovery_level) {
        case 1:
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                break;
        case 2:
                set_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
                break;
        case 3:
                set_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state);
                break;
        default:
                netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
                break;
        }

        i40e_service_event_schedule(pf);
        pf->tx_timeout_recovery_level++;
}

/**
 * i40e_get_vsi_stats_struct - Get System Network Statistics
 * @vsi: the VSI we care about
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the service task.
 **/
struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
{
        return &vsi->net_stats;
}

/**
 * i40e_get_netdev_stats_struct_tx - populate stats from a Tx ring
 * @ring: Tx ring to get statistics from
 * @stats: statistics entry to be updated
 **/
static void i40e_get_netdev_stats_struct_tx(struct i40e_ring *ring,
                                            struct rtnl_link_stats64 *stats)
{
        u64 bytes, packets;
        unsigned int start;

        do {
                start = u64_stats_fetch_begin_irq(&ring->syncp);
                packets = ring->stats.packets;
                bytes   = ring->stats.bytes;
        } while (u64_stats_fetch_retry_irq(&ring->syncp, start));

        stats->tx_packets += packets;
        stats->tx_bytes   += bytes;
}

/**
 * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 * @netdev: network interface device structure
 *
 * Returns the address of the device statistics structure.
 * The statistics are actually updated from the service task.
 **/
static void i40e_get_netdev_stats_struct(struct net_device *netdev,
                                  struct rtnl_link_stats64 *stats)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_ring *tx_ring, *rx_ring;
        struct i40e_vsi *vsi = np->vsi;
        struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
        int i;

        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        if (!vsi->tx_rings)
                return;

        rcu_read_lock();
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                u64 bytes, packets;
                unsigned int start;

                tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
                if (!tx_ring)
                        continue;
                i40e_get_netdev_stats_struct_tx(tx_ring, stats);

                rx_ring = &tx_ring[1];

                do {
                        start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
                        packets = rx_ring->stats.packets;
                        bytes   = rx_ring->stats.bytes;
                } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));

                stats->rx_packets += packets;
                stats->rx_bytes   += bytes;

                if (i40e_enabled_xdp_vsi(vsi))
                        i40e_get_netdev_stats_struct_tx(&rx_ring[1], stats);
        }
        rcu_read_unlock();

        /* following stats updated by i40e_watchdog_subtask() */
        stats->multicast        = vsi_stats->multicast;
        stats->tx_errors        = vsi_stats->tx_errors;
        stats->tx_dropped       = vsi_stats->tx_dropped;
        stats->rx_errors        = vsi_stats->rx_errors;
        stats->rx_dropped       = vsi_stats->rx_dropped;
        stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
        stats->rx_length_errors = vsi_stats->rx_length_errors;
}

/**
 * i40e_vsi_reset_stats - Resets all stats of the given vsi
 * @vsi: the VSI to have its stats reset
 **/
void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
{
        struct rtnl_link_stats64 *ns;
        int i;

        if (!vsi)
                return;

        ns = i40e_get_vsi_stats_struct(vsi);
        memset(ns, 0, sizeof(*ns));
        memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
        memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
        memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
        if (vsi->rx_rings && vsi->rx_rings[0]) {
                for (i = 0; i < vsi->num_queue_pairs; i++) {
                        memset(&vsi->rx_rings[i]->stats, 0,
                               sizeof(vsi->rx_rings[i]->stats));
                        memset(&vsi->rx_rings[i]->rx_stats, 0,
                               sizeof(vsi->rx_rings[i]->rx_stats));
                        memset(&vsi->tx_rings[i]->stats, 0,
                               sizeof(vsi->tx_rings[i]->stats));
                        memset(&vsi->tx_rings[i]->tx_stats, 0,
                               sizeof(vsi->tx_rings[i]->tx_stats));
                }
        }
        vsi->stat_offsets_loaded = false;
}

/**
 * i40e_pf_reset_stats - Reset all of the stats for the given PF
 * @pf: the PF to be reset
 **/
void i40e_pf_reset_stats(struct i40e_pf *pf)
{
        int i;

        memset(&pf->stats, 0, sizeof(pf->stats));
        memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
        pf->stat_offsets_loaded = false;

        for (i = 0; i < I40E_MAX_VEB; i++) {
                if (pf->veb[i]) {
                        memset(&pf->veb[i]->stats, 0,
                               sizeof(pf->veb[i]->stats));
                        memset(&pf->veb[i]->stats_offsets, 0,
                               sizeof(pf->veb[i]->stats_offsets));
                        pf->veb[i]->stat_offsets_loaded = false;
                }
        }
        pf->hw_csum_rx_error = 0;
}

/**
 * i40e_stat_update48 - read and update a 48 bit stat from the chip
 * @hw: ptr to the hardware info
 * @hireg: the high 32 bit reg to read
 * @loreg: the low 32 bit reg to read
 * @offset_loaded: has the initial offset been loaded yet
 * @offset: ptr to current offset value
 * @stat: ptr to the stat
 *
 * Since the device stats are not reset at PFReset, they likely will not
 * be zeroed when the driver starts.  We'll save the first values read
 * and use them as offsets to be subtracted from the raw values in order
 * to report stats that count from zero.  In the process, we also manage
 * the potential roll-over.
 **/
static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
                               bool offset_loaded, u64 *offset, u64 *stat)
{
        u64 new_data;

        if (hw->device_id == I40E_DEV_ID_QEMU) {
                new_data = rd32(hw, loreg);
                new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
        } else {
                new_data = rd64(hw, loreg);
        }
        if (!offset_loaded)
                *offset = new_data;
        if (likely(new_data >= *offset))
                *stat = new_data - *offset;
        else
                *stat = (new_data + BIT_ULL(48)) - *offset;
        *stat &= 0xFFFFFFFFFFFFULL;
}

/**
 * i40e_stat_update32 - read and update a 32 bit stat from the chip
 * @hw: ptr to the hardware info
 * @reg: the hw reg to read
 * @offset_loaded: has the initial offset been loaded yet
 * @offset: ptr to current offset value
 * @stat: ptr to the stat
 **/
static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
                               bool offset_loaded, u64 *offset, u64 *stat)
{
        u32 new_data;

        new_data = rd32(hw, reg);
        if (!offset_loaded)
                *offset = new_data;
        if (likely(new_data >= *offset))
                *stat = (u32)(new_data - *offset);
        else
                *stat = (u32)((new_data + BIT_ULL(32)) - *offset);
}

/**
 * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 * @vsi: the VSI to be updated
 **/
void i40e_update_eth_stats(struct i40e_vsi *vsi)
{
        int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */

        es = &vsi->eth_stats;
        oes = &vsi->eth_stats_offsets;

        /* Gather up the stats that the hw collects */
        i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_errors, &es->tx_errors);
        i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_discards, &es->rx_discards);
        i40e_stat_update32(hw, I40E_GLV_RUPP(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_unknown_protocol, &es->rx_unknown_protocol);
        i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_errors, &es->tx_errors);

        i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
                           I40E_GLV_GORCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_bytes, &es->rx_bytes);
        i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
                           I40E_GLV_UPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_unicast, &es->rx_unicast);
        i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
                           I40E_GLV_MPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_multicast, &es->rx_multicast);
        i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
                           I40E_GLV_BPRCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->rx_broadcast, &es->rx_broadcast);

        i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
                           I40E_GLV_GOTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_bytes, &es->tx_bytes);
        i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
                           I40E_GLV_UPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_unicast, &es->tx_unicast);
        i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
                           I40E_GLV_MPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_multicast, &es->tx_multicast);
        i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
                           I40E_GLV_BPTCL(stat_idx),
                           vsi->stat_offsets_loaded,
                           &oes->tx_broadcast, &es->tx_broadcast);
        vsi->stat_offsets_loaded = true;
}

/**
 * i40e_update_veb_stats - Update Switch component statistics
 * @veb: the VEB being updated
 **/
static void i40e_update_veb_stats(struct i40e_veb *veb)
{
        struct i40e_pf *pf = veb->pf;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */
        struct i40e_veb_tc_stats *veb_oes;
        struct i40e_veb_tc_stats *veb_es;
        int i, idx = 0;

        idx = veb->stats_idx;
        es = &veb->stats;
        oes = &veb->stats_offsets;
        veb_es = &veb->tc_stats;
        veb_oes = &veb->tc_stats_offsets;

        /* Gather up the stats that the hw collects */
        i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_discards, &es->tx_discards);
        if (hw->revision_id > 0)
                i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
                                   veb->stat_offsets_loaded,
                                   &oes->rx_unknown_protocol,
                                   &es->rx_unknown_protocol);
        i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_bytes, &es->rx_bytes);
        i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_unicast, &es->rx_unicast);
        i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_multicast, &es->rx_multicast);
        i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->rx_broadcast, &es->rx_broadcast);

        i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_bytes, &es->tx_bytes);
        i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_unicast, &es->tx_unicast);
        i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_multicast, &es->tx_multicast);
        i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
                           veb->stat_offsets_loaded,
                           &oes->tx_broadcast, &es->tx_broadcast);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                i40e_stat_update48(hw, I40E_GLVEBTC_RPCH(i, idx),
                                   I40E_GLVEBTC_RPCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_rx_packets[i],
                                   &veb_es->tc_rx_packets[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_RBCH(i, idx),
                                   I40E_GLVEBTC_RBCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_rx_bytes[i],
                                   &veb_es->tc_rx_bytes[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_TPCH(i, idx),
                                   I40E_GLVEBTC_TPCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_tx_packets[i],
                                   &veb_es->tc_tx_packets[i]);
                i40e_stat_update48(hw, I40E_GLVEBTC_TBCH(i, idx),
                                   I40E_GLVEBTC_TBCL(i, idx),
                                   veb->stat_offsets_loaded,
                                   &veb_oes->tc_tx_bytes[i],
                                   &veb_es->tc_tx_bytes[i]);
        }
        veb->stat_offsets_loaded = true;
}

/**
 * i40e_update_vsi_stats - Update the vsi statistics counters.
 * @vsi: the VSI to be updated
 *
 * There are a few instances where we store the same stat in a
 * couple of different structs.  This is partly because we have
 * the netdev stats that need to be filled out, which is slightly
 * different from the "eth_stats" defined by the chip and used in
 * VF communications.  We sort it out here.
 **/
static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct rtnl_link_stats64 *ons;
        struct rtnl_link_stats64 *ns;   /* netdev stats */
        struct i40e_eth_stats *oes;
        struct i40e_eth_stats *es;     /* device's eth stats */
        u32 tx_restart, tx_busy;
        struct i40e_ring *p;
        u32 rx_page, rx_buf;
        u64 bytes, packets;
        unsigned int start;
        u64 tx_linearize;
        u64 tx_force_wb;
        u64 rx_p, rx_b;
        u64 tx_p, tx_b;
        u16 q;

        if (test_bit(__I40E_VSI_DOWN, vsi->state) ||
            test_bit(__I40E_CONFIG_BUSY, pf->state))
                return;

        ns = i40e_get_vsi_stats_struct(vsi);
        ons = &vsi->net_stats_offsets;
        es = &vsi->eth_stats;
        oes = &vsi->eth_stats_offsets;

        /* Gather up the netdev and vsi stats that the driver collects
         * on the fly during packet processing
         */
        rx_b = rx_p = 0;
        tx_b = tx_p = 0;
        tx_restart = tx_busy = tx_linearize = tx_force_wb = 0;
        rx_page = 0;
        rx_buf = 0;
        rcu_read_lock();
        for (q = 0; q < vsi->num_queue_pairs; q++) {
                /* locate Tx ring */
                p = ACCESS_ONCE(vsi->tx_rings[q]);

                do {
                        start = u64_stats_fetch_begin_irq(&p->syncp);
                        packets = p->stats.packets;
                        bytes = p->stats.bytes;
                } while (u64_stats_fetch_retry_irq(&p->syncp, start));
                tx_b += bytes;
                tx_p += packets;
                tx_restart += p->tx_stats.restart_queue;
                tx_busy += p->tx_stats.tx_busy;
                tx_linearize += p->tx_stats.tx_linearize;
                tx_force_wb += p->tx_stats.tx_force_wb;

                /* Rx queue is part of the same block as Tx queue */
                p = &p[1];
                do {
                        start = u64_stats_fetch_begin_irq(&p->syncp);
                        packets = p->stats.packets;
                        bytes = p->stats.bytes;
                } while (u64_stats_fetch_retry_irq(&p->syncp, start));
                rx_b += bytes;
                rx_p += packets;
                rx_buf += p->rx_stats.alloc_buff_failed;
                rx_page += p->rx_stats.alloc_page_failed;
        }
        rcu_read_unlock();
        vsi->tx_restart = tx_restart;
        vsi->tx_busy = tx_busy;
        vsi->tx_linearize = tx_linearize;
        vsi->tx_force_wb = tx_force_wb;
        vsi->rx_page_failed = rx_page;
        vsi->rx_buf_failed = rx_buf;

        ns->rx_packets = rx_p;
        ns->rx_bytes = rx_b;
        ns->tx_packets = tx_p;
        ns->tx_bytes = tx_b;

        /* update netdev stats from eth stats */
        i40e_update_eth_stats(vsi);
        ons->tx_errors = oes->tx_errors;
        ns->tx_errors = es->tx_errors;
        ons->multicast = oes->rx_multicast;
        ns->multicast = es->rx_multicast;
        ons->rx_dropped = oes->rx_discards;
        ns->rx_dropped = es->rx_discards;
        ons->tx_dropped = oes->tx_discards;
        ns->tx_dropped = es->tx_discards;

        /* pull in a couple PF stats if this is the main vsi */
        if (vsi == pf->vsi[pf->lan_vsi]) {
                ns->rx_crc_errors = pf->stats.crc_errors;
                ns->rx_errors = pf->stats.crc_errors + pf->stats.illegal_bytes;
                ns->rx_length_errors = pf->stats.rx_length_errors;
        }
}

/**
 * i40e_update_pf_stats - Update the PF statistics counters.
 * @pf: the PF to be updated
 **/
static void i40e_update_pf_stats(struct i40e_pf *pf)
{
        struct i40e_hw_port_stats *osd = &pf->stats_offsets;
        struct i40e_hw_port_stats *nsd = &pf->stats;
        struct i40e_hw *hw = &pf->hw;
        u32 val;
        int i;

        i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
                           I40E_GLPRT_GORCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
        i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
                           I40E_GLPRT_GOTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
        i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_discards,
                           &nsd->eth.rx_discards);
        i40e_stat_update48(hw, I40E_GLPRT_UPRCH(hw->port),
                           I40E_GLPRT_UPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_unicast,
                           &nsd->eth.rx_unicast);
        i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
                           I40E_GLPRT_MPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_multicast,
                           &nsd->eth.rx_multicast);
        i40e_stat_update48(hw, I40E_GLPRT_BPRCH(hw->port),
                           I40E_GLPRT_BPRCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.rx_broadcast,
                           &nsd->eth.rx_broadcast);
        i40e_stat_update48(hw, I40E_GLPRT_UPTCH(hw->port),
                           I40E_GLPRT_UPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_unicast,
                           &nsd->eth.tx_unicast);
        i40e_stat_update48(hw, I40E_GLPRT_MPTCH(hw->port),
                           I40E_GLPRT_MPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_multicast,
                           &nsd->eth.tx_multicast);
        i40e_stat_update48(hw, I40E_GLPRT_BPTCH(hw->port),
                           I40E_GLPRT_BPTCL(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->eth.tx_broadcast,
                           &nsd->eth.tx_broadcast);

        i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_dropped_link_down,
                           &nsd->tx_dropped_link_down);

        i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->crc_errors, &nsd->crc_errors);

        i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->illegal_bytes, &nsd->illegal_bytes);

        i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->mac_local_faults,
                           &nsd->mac_local_faults);
        i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->mac_remote_faults,
                           &nsd->mac_remote_faults);

        i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_length_errors,
                           &nsd->rx_length_errors);

        i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xon_rx, &nsd->link_xon_rx);
        i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xon_tx, &nsd->link_xon_tx);
        i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xoff_rx, &nsd->link_xoff_rx);
        i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->link_xoff_tx, &nsd->link_xoff_tx);

        for (i = 0; i < 8; i++) {
                i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xoff_rx[i],
                                   &nsd->priority_xoff_rx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_rx[i],
                                   &nsd->priority_xon_rx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_tx[i],
                                   &nsd->priority_xon_tx[i]);
                i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xoff_tx[i],
                                   &nsd->priority_xoff_tx[i]);
                i40e_stat_update32(hw,
                                   I40E_GLPRT_RXON2OFFCNT(hw->port, i),
                                   pf->stat_offsets_loaded,
                                   &osd->priority_xon_2_xoff[i],
                                   &nsd->priority_xon_2_xoff[i]);
        }

        i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
                           I40E_GLPRT_PRC64L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_64, &nsd->rx_size_64);
        i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
                           I40E_GLPRT_PRC127L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_127, &nsd->rx_size_127);
        i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
                           I40E_GLPRT_PRC255L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_255, &nsd->rx_size_255);
        i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
                           I40E_GLPRT_PRC511L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_511, &nsd->rx_size_511);
        i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
                           I40E_GLPRT_PRC1023L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_1023, &nsd->rx_size_1023);
        i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
                           I40E_GLPRT_PRC1522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_1522, &nsd->rx_size_1522);
        i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
                           I40E_GLPRT_PRC9522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_size_big, &nsd->rx_size_big);

        i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
                           I40E_GLPRT_PTC64L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_64, &nsd->tx_size_64);
        i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
                           I40E_GLPRT_PTC127L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_127, &nsd->tx_size_127);
        i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
                           I40E_GLPRT_PTC255L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_255, &nsd->tx_size_255);
        i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
                           I40E_GLPRT_PTC511L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_511, &nsd->tx_size_511);
        i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
                           I40E_GLPRT_PTC1023L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_1023, &nsd->tx_size_1023);
        i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
                           I40E_GLPRT_PTC1522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_1522, &nsd->tx_size_1522);
        i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
                           I40E_GLPRT_PTC9522L(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->tx_size_big, &nsd->tx_size_big);

        i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_undersize, &nsd->rx_undersize);
        i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_fragments, &nsd->rx_fragments);
        i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_oversize, &nsd->rx_oversize);
        i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
                           pf->stat_offsets_loaded,
                           &osd->rx_jabber, &nsd->rx_jabber);

        /* FDIR stats */
        i40e_stat_update32(hw,
                           I40E_GLQF_PCNT(I40E_FD_ATR_STAT_IDX(pf->hw.pf_id)),
                           pf->stat_offsets_loaded,
                           &osd->fd_atr_match, &nsd->fd_atr_match);
        i40e_stat_update32(hw,
                           I40E_GLQF_PCNT(I40E_FD_SB_STAT_IDX(pf->hw.pf_id)),
                           pf->stat_offsets_loaded,
                           &osd->fd_sb_match, &nsd->fd_sb_match);
        i40e_stat_update32(hw,
                      I40E_GLQF_PCNT(I40E_FD_ATR_TUNNEL_STAT_IDX(pf->hw.pf_id)),
                      pf->stat_offsets_loaded,
                      &osd->fd_atr_tunnel_match, &nsd->fd_atr_tunnel_match);

        val = rd32(hw, I40E_PRTPM_EEE_STAT);
        nsd->tx_lpi_status =
                       (val & I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_MASK) >>
                        I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_SHIFT;
        nsd->rx_lpi_status =
                       (val & I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_MASK) >>
                        I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_SHIFT;
        i40e_stat_update32(hw, I40E_PRTPM_TLPIC,
                           pf->stat_offsets_loaded,
                           &osd->tx_lpi_count, &nsd->tx_lpi_count);
        i40e_stat_update32(hw, I40E_PRTPM_RLPIC,
                           pf->stat_offsets_loaded,
                           &osd->rx_lpi_count, &nsd->rx_lpi_count);

        if (pf->flags & I40E_FLAG_FD_SB_ENABLED &&
            !(pf->flags & I40E_FLAG_FD_SB_AUTO_DISABLED))
                nsd->fd_sb_status = true;
        else
                nsd->fd_sb_status = false;

        if (pf->flags & I40E_FLAG_FD_ATR_ENABLED &&
            !(pf->flags & I40E_FLAG_FD_ATR_AUTO_DISABLED))
                nsd->fd_atr_status = true;
        else
                nsd->fd_atr_status = false;

        pf->stat_offsets_loaded = true;
}

/**
 * i40e_update_stats - Update the various statistics counters.
 * @vsi: the VSI to be updated
 *
 * Update the various stats for this VSI and its related entities.
 **/
void i40e_update_stats(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        if (vsi == pf->vsi[pf->lan_vsi])
                i40e_update_pf_stats(pf);

        i40e_update_vsi_stats(vsi);
}

/**
 * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the vlan
 *
 * Returns ptr to the filter object or NULL
 **/
static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
                                                const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        key = i40e_addr_to_hkey(macaddr);
        hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
                if ((ether_addr_equal(macaddr, f->macaddr)) &&
                    (vlan == f->vlan))
                        return f;
        }
        return NULL;
}

/**
 * i40e_find_mac - Find a mac addr in the macvlan filters list
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address we are searching for
 *
 * Returns the first filter with the provided MAC address or NULL if
 * MAC address was not found
 **/
struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, const u8 *macaddr)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        key = i40e_addr_to_hkey(macaddr);
        hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
                if ((ether_addr_equal(macaddr, f->macaddr)))
                        return f;
        }
        return NULL;
}

/**
 * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
 * @vsi: the VSI to be searched
 *
 * Returns true if VSI is in vlan mode or false otherwise
 **/
bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
{
        /* If we have a PVID, always operate in VLAN mode */
        if (vsi->info.pvid)
                return true;

        /* We need to operate in VLAN mode whenever we have any filters with
         * a VLAN other than I40E_VLAN_ALL. We could check the table each
         * time, incurring search cost repeatedly. However, we can notice two
         * things:
         *
         * 1) the only place where we can gain a VLAN filter is in
         *    i40e_add_filter.
         *
         * 2) the only place where filters are actually removed is in
         *    i40e_sync_filters_subtask.
         *
         * Thus, we can simply use a boolean value, has_vlan_filters which we
         * will set to true when we add a VLAN filter in i40e_add_filter. Then
         * we have to perform the full search after deleting filters in
         * i40e_sync_filters_subtask, but we already have to search
         * filters here and can perform the check at the same time. This
         * results in avoiding embedding a loop for VLAN mode inside another
         * loop over all the filters, and should maintain correctness as noted
         * above.
         */
        return vsi->has_vlan_filter;
}

/**
 * i40e_correct_mac_vlan_filters - Correct non-VLAN filters if necessary
 * @vsi: the VSI to configure
 * @tmp_add_list: list of filters ready to be added
 * @tmp_del_list: list of filters ready to be deleted
 * @vlan_filters: the number of active VLAN filters
 *
 * Update VLAN=0 and VLAN=-1 (I40E_VLAN_ANY) filters properly so that they
 * behave as expected. If we have any active VLAN filters remaining or about
 * to be added then we need to update non-VLAN filters to be marked as VLAN=0
 * so that they only match against untagged traffic. If we no longer have any
 * active VLAN filters, we need to make all non-VLAN filters marked as VLAN=-1
 * so that they match against both tagged and untagged traffic. In this way,
 * we ensure that we correctly receive the desired traffic. This ensures that
 * when we have an active VLAN we will receive only untagged traffic and
 * traffic matching active VLANs. If we have no active VLANs then we will
 * operate in non-VLAN mode and receive all traffic, tagged or untagged.
 *
 * Finally, in a similar fashion, this function also corrects filters when
 * there is an active PVID assigned to this VSI.
 *
 * In case of memory allocation failure return -ENOMEM. Otherwise, return 0.
 *
 * This function is only expected to be called from within
 * i40e_sync_vsi_filters.
 *
 * NOTE: This function expects to be called while under the
 * mac_filter_hash_lock
 */
static int i40e_correct_mac_vlan_filters(struct i40e_vsi *vsi,
                                         struct hlist_head *tmp_add_list,
                                         struct hlist_head *tmp_del_list,
                                         int vlan_filters)
{
        s16 pvid = le16_to_cpu(vsi->info.pvid);
        struct i40e_mac_filter *f, *add_head;
        struct i40e_new_mac_filter *new;
        struct hlist_node *h;
        int bkt, new_vlan;

        /* To determine if a particular filter needs to be replaced we
         * have the three following conditions:
         *
         * a) if we have a PVID assigned, then all filters which are
         *    not marked as VLAN=PVID must be replaced with filters that
         *    are.
         * b) otherwise, if we have any active VLANS, all filters
         *    which are marked as VLAN=-1 must be replaced with
         *    filters marked as VLAN=0
         * c) finally, if we do not have any active VLANS, all filters
         *    which are marked as VLAN=0 must be replaced with filters
         *    marked as VLAN=-1
         */

        /* Update the filters about to be added in place */
        hlist_for_each_entry(new, tmp_add_list, hlist) {
                if (pvid && new->f->vlan != pvid)
                        new->f->vlan = pvid;
                else if (vlan_filters && new->f->vlan == I40E_VLAN_ANY)
                        new->f->vlan = 0;
                else if (!vlan_filters && new->f->vlan == 0)
                        new->f->vlan = I40E_VLAN_ANY;
        }

        /* Update the remaining active filters */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                /* Combine the checks for whether a filter needs to be changed
                 * and then determine the new VLAN inside the if block, in
                 * order to avoid duplicating code for adding the new filter
                 * then deleting the old filter.
                 */
                if ((pvid && f->vlan != pvid) ||
                    (vlan_filters && f->vlan == I40E_VLAN_ANY) ||
                    (!vlan_filters && f->vlan == 0)) {
                        /* Determine the new vlan we will be adding */
                        if (pvid)
                                new_vlan = pvid;
                        else if (vlan_filters)
                                new_vlan = 0;
                        else
                                new_vlan = I40E_VLAN_ANY;

                        /* Create the new filter */
                        add_head = i40e_add_filter(vsi, f->macaddr, new_vlan);
                        if (!add_head)
                                return -ENOMEM;

                        /* Create a temporary i40e_new_mac_filter */
                        new = kzalloc(sizeof(*new), GFP_ATOMIC);
                        if (!new)
                                return -ENOMEM;

                        new->f = add_head;
                        new->state = add_head->state;

                        /* Add the new filter to the tmp list */
                        hlist_add_head(&new->hlist, tmp_add_list);

                        /* Put the original filter into the delete list */
                        f->state = I40E_FILTER_REMOVE;
                        hash_del(&f->hlist);
                        hlist_add_head(&f->hlist, tmp_del_list);
                }
        }

        vsi->has_vlan_filter = !!vlan_filters;

        return 0;
}

/**
 * i40e_rm_default_mac_filter - Remove the default MAC filter set by NVM
 * @vsi: the PF Main VSI - inappropriate for any other VSI
 * @macaddr: the MAC address
 *
 * Remove whatever filter the firmware set up so the driver can manage
 * its own filtering intelligently.
 **/
static void i40e_rm_default_mac_filter(struct i40e_vsi *vsi, u8 *macaddr)
{
        struct i40e_aqc_remove_macvlan_element_data element;
        struct i40e_pf *pf = vsi->back;

        /* Only appropriate for the PF main VSI */
        if (vsi->type != I40E_VSI_MAIN)
                return;

        memset(&element, 0, sizeof(element));
        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        /* Ignore error returns, some firmware does it this way... */
        element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
        i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);

        memset(&element, 0, sizeof(element));
        ether_addr_copy(element.mac_addr, macaddr);
        element.vlan_tag = 0;
        /* ...and some firmware does it this way. */
        element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH |
                        I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
        i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
}

/**
 * i40e_add_filter - Add a mac/vlan filter to the VSI
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the vlan
 *
 * Returns ptr to the filter object or NULL when no memory available.
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 **/
struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
                                        const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;
        u64 key;

        if (!vsi || !macaddr)
                return NULL;

        f = i40e_find_filter(vsi, macaddr, vlan);
        if (!f) {
                f = kzalloc(sizeof(*f), GFP_ATOMIC);
                if (!f)
                        return NULL;

                /* Update the boolean indicating if we need to function in
                 * VLAN mode.
                 */
                if (vlan >= 0)
                        vsi->has_vlan_filter = true;

                ether_addr_copy(f->macaddr, macaddr);
                f->vlan = vlan;
                /* If we're in overflow promisc mode, set the state directly
                 * to failed, so we don't bother to try sending the filter
                 * to the hardware.
                 */
                if (test_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state))
                        f->state = I40E_FILTER_FAILED;
                else
                        f->state = I40E_FILTER_NEW;
                INIT_HLIST_NODE(&f->hlist);

                key = i40e_addr_to_hkey(macaddr);
                hash_add(vsi->mac_filter_hash, &f->hlist, key);

                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
        }

        /* If we're asked to add a filter that has been marked for removal, it
         * is safe to simply restore it to active state. __i40e_del_filter
         * will have simply deleted any filters which were previously marked
         * NEW or FAILED, so if it is currently marked REMOVE it must have
         * previously been ACTIVE. Since we haven't yet run the sync filters
         * task, just restore this filter to the ACTIVE state so that the
         * sync task leaves it in place
         */
        if (f->state == I40E_FILTER_REMOVE)
                f->state = I40E_FILTER_ACTIVE;

        return f;
}

/**
 * __i40e_del_filter - Remove a specific filter from the VSI
 * @vsi: VSI to remove from
 * @f: the filter to remove from the list
 *
 * This function should be called instead of i40e_del_filter only if you know
 * the exact filter you will remove already, such as via i40e_find_filter or
 * i40e_find_mac.
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 * ANOTHER NOTE: This function MUST be called from within the context of
 * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
 * instead of list_for_each_entry().
 **/
void __i40e_del_filter(struct i40e_vsi *vsi, struct i40e_mac_filter *f)
{
        if (!f)
                return;

        /* If the filter was never added to firmware then we can just delete it
         * directly and we don't want to set the status to remove or else an
         * admin queue command will unnecessarily fire.
         */
        if ((f->state == I40E_FILTER_FAILED) ||
            (f->state == I40E_FILTER_NEW)) {
                hash_del(&f->hlist);
                kfree(f);
        } else {
                f->state = I40E_FILTER_REMOVE;
        }

        vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
        vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
}

/**
 * i40e_del_filter - Remove a MAC/VLAN filter from the VSI
 * @vsi: the VSI to be searched
 * @macaddr: the MAC address
 * @vlan: the VLAN
 *
 * NOTE: This function is expected to be called with mac_filter_hash_lock
 * being held.
 * ANOTHER NOTE: This function MUST be called from within the context of
 * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
 * instead of list_for_each_entry().
 **/
void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
{
        struct i40e_mac_filter *f;

        if (!vsi || !macaddr)
                return;

        f = i40e_find_filter(vsi, macaddr, vlan);
        __i40e_del_filter(vsi, f);
}

/**
 * i40e_add_mac_filter - Add a MAC filter for all active VLANs
 * @vsi: the VSI to be searched
 * @macaddr: the mac address to be filtered
 *
 * If we're not in VLAN mode, just add the filter to I40E_VLAN_ANY. Otherwise,
 * go through all the macvlan filters and add a macvlan filter for each
 * unique vlan that already exists. If a PVID has been assigned, instead only
 * add the macaddr to that VLAN.
 *
 * Returns last filter added on success, else NULL
 **/
struct i40e_mac_filter *i40e_add_mac_filter(struct i40e_vsi *vsi,
                                            const u8 *macaddr)
{
        struct i40e_mac_filter *f, *add = NULL;
        struct hlist_node *h;
        int bkt;

        if (vsi->info.pvid)
                return i40e_add_filter(vsi, macaddr,
                                       le16_to_cpu(vsi->info.pvid));

        if (!i40e_is_vsi_in_vlan(vsi))
                return i40e_add_filter(vsi, macaddr, I40E_VLAN_ANY);

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->state == I40E_FILTER_REMOVE)
                        continue;
                add = i40e_add_filter(vsi, macaddr, f->vlan);
                if (!add)
                        return NULL;
        }

        return add;
}

/**
 * i40e_del_mac_filter - Remove a MAC filter from all VLANs
 * @vsi: the VSI to be searched
 * @macaddr: the mac address to be removed
 *
 * Removes a given MAC address from a VSI regardless of what VLAN it has been
 * associated with.
 *
 * Returns 0 for success, or error
 **/
int i40e_del_mac_filter(struct i40e_vsi *vsi, const u8 *macaddr)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        bool found = false;
        int bkt;

        WARN(!spin_is_locked(&vsi->mac_filter_hash_lock),
             "Missing mac_filter_hash_lock\n");
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (ether_addr_equal(macaddr, f->macaddr)) {
                        __i40e_del_filter(vsi, f);
                        found = true;
                }
        }

        if (found)
                return 0;
        else
                return -ENOENT;
}

/**
 * i40e_set_mac - NDO callback to set mac address
 * @netdev: network interface device structure
 * @p: pointer to an address structure
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_set_mac(struct net_device *netdev, void *p)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct sockaddr *addr = p;

        if (!is_valid_ether_addr(addr->sa_data))
                return -EADDRNOTAVAIL;

        if (ether_addr_equal(netdev->dev_addr, addr->sa_data)) {
                netdev_info(netdev, "already using mac address %pM\n",
                            addr->sa_data);
                return 0;
        }

        if (test_bit(__I40E_VSI_DOWN, vsi->back->state) ||
            test_bit(__I40E_RESET_RECOVERY_PENDING, vsi->back->state))
                return -EADDRNOTAVAIL;

        if (ether_addr_equal(hw->mac.addr, addr->sa_data))
                netdev_info(netdev, "returning to hw mac address %pM\n",
                            hw->mac.addr);
        else
                netdev_info(netdev, "set new mac address %pM\n", addr->sa_data);

        /* Copy the address first, so that we avoid a possible race with
         * .set_rx_mode(). If we copy after changing the address in the filter
         * list, we might open ourselves to a narrow race window where
         * .set_rx_mode could delete our dev_addr filter and prevent traffic
         * from passing.
         */
        ether_addr_copy(netdev->dev_addr, addr->sa_data);

        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_del_mac_filter(vsi, netdev->dev_addr);
        i40e_add_mac_filter(vsi, addr->sa_data);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);
        if (vsi->type == I40E_VSI_MAIN) {
                i40e_status ret;

                ret = i40e_aq_mac_address_write(&vsi->back->hw,
                                                I40E_AQC_WRITE_TYPE_LAA_WOL,
                                                addr->sa_data, NULL);
                if (ret)
                        netdev_info(netdev, "Ignoring error from firmware on LAA update, status %s, AQ ret %s\n",
                                    i40e_stat_str(hw, ret),
                                    i40e_aq_str(hw, hw->aq.asq_last_status));
        }

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
        return 0;
}

/**
 * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
 * @vsi: the VSI being setup
 * @ctxt: VSI context structure
 * @enabled_tc: Enabled TCs bitmap
 * @is_add: True if called before Add VSI
 *
 * Setup VSI queue mapping for enabled traffic classes.
 **/
static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
                                     struct i40e_vsi_context *ctxt,
                                     u8 enabled_tc,
                                     bool is_add)
{
        struct i40e_pf *pf = vsi->back;
        u16 sections = 0;
        u8 netdev_tc = 0;
        u16 numtc = 0;
        u16 qcount;
        u8 offset;
        u16 qmap;
        int i;
        u16 num_tc_qps = 0;

        sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
        offset = 0;

        if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
                /* Find numtc from enabled TC bitmap */
                for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                        if (enabled_tc & BIT(i)) /* TC is enabled */
                                numtc++;
                }
                if (!numtc) {
                        dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
                        numtc = 1;
                }
        } else {
                /* At least TC0 is enabled in case of non-DCB case */
                numtc = 1;
        }

        vsi->tc_config.numtc = numtc;
        vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
        /* Number of queues per enabled TC */
        qcount = vsi->alloc_queue_pairs;

        num_tc_qps = qcount / numtc;
        num_tc_qps = min_t(int, num_tc_qps, i40e_pf_get_max_q_per_tc(pf));

        /* Setup queue offset/count for all TCs for given VSI */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* See if the given TC is enabled for the given VSI */
                if (vsi->tc_config.enabled_tc & BIT(i)) {
                        /* TC is enabled */
                        int pow, num_qps;

                        switch (vsi->type) {
                        case I40E_VSI_MAIN:
                                qcount = min_t(int, pf->alloc_rss_size,
                                               num_tc_qps);
                                break;
                        case I40E_VSI_FDIR:
                        case I40E_VSI_SRIOV:
                        case I40E_VSI_VMDQ2:
                        default:
                                qcount = num_tc_qps;
                                WARN_ON(i != 0);
                                break;
                        }
                        vsi->tc_config.tc_info[i].qoffset = offset;
                        vsi->tc_config.tc_info[i].qcount = qcount;

                        /* find the next higher power-of-2 of num queue pairs */
                        num_qps = qcount;
                        pow = 0;
                        while (num_qps && (BIT_ULL(pow) < qcount)) {
                                pow++;
                                num_qps >>= 1;
                        }

                        vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
                        qmap =
                            (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
                            (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);

                        offset += qcount;
                } else {
                        /* TC is not enabled so set the offset to
                         * default queue and allocate one queue
                         * for the given TC.
                         */
                        vsi->tc_config.tc_info[i].qoffset = 0;
                        vsi->tc_config.tc_info[i].qcount = 1;
                        vsi->tc_config.tc_info[i].netdev_tc = 0;

                        qmap = 0;
                }
                ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
        }

        /* Set actual Tx/Rx queue pairs */
        vsi->num_queue_pairs = offset;
        if ((vsi->type == I40E_VSI_MAIN) && (numtc == 1)) {
                if (vsi->req_queue_pairs > 0)
                        vsi->num_queue_pairs = vsi->req_queue_pairs;
                else if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                        vsi->num_queue_pairs = pf->num_lan_msix;
        }

        /* Scheduler section valid can only be set for ADD VSI */
        if (is_add) {
                sections |= I40E_AQ_VSI_PROP_SCHED_VALID;

                ctxt->info.up_enable_bits = enabled_tc;
        }
        if (vsi->type == I40E_VSI_SRIOV) {
                ctxt->info.mapping_flags |=
                                     cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        ctxt->info.queue_mapping[i] =
                                               cpu_to_le16(vsi->base_queue + i);
        } else {
                ctxt->info.mapping_flags |=
                                        cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
                ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
        }
        ctxt->info.valid_sections |= cpu_to_le16(sections);
}

/**
 * i40e_addr_sync - Callback for dev_(mc|uc)_sync to add address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int i40e_addr_sync(struct net_device *netdev, const u8 *addr)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        if (i40e_add_mac_filter(vsi, addr))
                return 0;
        else
                return -ENOMEM;
}

/**
 * i40e_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 * @netdev: the netdevice
 * @addr: address to add
 *
 * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 */
static int i40e_addr_unsync(struct net_device *netdev, const u8 *addr)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        /* Under some circumstances, we might receive a request to delete
         * our own device address from our uc list. Because we store the
         * device address in the VSI's MAC/VLAN filter list, we need to ignore
         * such requests and not delete our device address from this list.
         */
        if (ether_addr_equal(addr, netdev->dev_addr))
                return 0;

        i40e_del_mac_filter(vsi, addr);

        return 0;
}

/**
 * i40e_set_rx_mode - NDO callback to set the netdev filters
 * @netdev: network interface device structure
 **/
static void i40e_set_rx_mode(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        spin_lock_bh(&vsi->mac_filter_hash_lock);

        __dev_uc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);
        __dev_mc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* check for other flag changes */
        if (vsi->current_netdev_flags != vsi->netdev->flags) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
        }

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
}

/**
 * i40e_undo_del_filter_entries - Undo the changes made to MAC filter entries
 * @vsi: Pointer to VSI struct
 * @from: Pointer to list which contains MAC filter entries - changes to
 *        those entries needs to be undone.
 *
 * MAC filter entries from this list were slated for deletion.
 **/
static void i40e_undo_del_filter_entries(struct i40e_vsi *vsi,
                                         struct hlist_head *from)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;

        hlist_for_each_entry_safe(f, h, from, hlist) {
                u64 key = i40e_addr_to_hkey(f->macaddr);

                /* Move the element back into MAC filter list*/
                hlist_del(&f->hlist);
                hash_add(vsi->mac_filter_hash, &f->hlist, key);
        }
}

/**
 * i40e_undo_add_filter_entries - Undo the changes made to MAC filter entries
 * @vsi: Pointer to vsi struct
 * @from: Pointer to list which contains MAC filter entries - changes to
 *        those entries needs to be undone.
 *
 * MAC filter entries from this list were slated for addition.
 **/
static void i40e_undo_add_filter_entries(struct i40e_vsi *vsi,
                                         struct hlist_head *from)
{
        struct i40e_new_mac_filter *new;
        struct hlist_node *h;

        hlist_for_each_entry_safe(new, h, from, hlist) {
                /* We can simply free the wrapper structure */
                hlist_del(&new->hlist);
                kfree(new);
        }
}

/**
 * i40e_next_entry - Get the next non-broadcast filter from a list
 * @next: pointer to filter in list
 *
 * Returns the next non-broadcast filter in the list. Required so that we
 * ignore broadcast filters within the list, since these are not handled via
 * the normal firmware update path.
 */
static
struct i40e_new_mac_filter *i40e_next_filter(struct i40e_new_mac_filter *next)
{
        hlist_for_each_entry_continue(next, hlist) {
                if (!is_broadcast_ether_addr(next->f->macaddr))
                        return next;
        }

        return NULL;
}

/**
 * i40e_update_filter_state - Update filter state based on return data
 * from firmware
 * @count: Number of filters added
 * @add_list: return data from fw
 * @head: pointer to first filter in current batch
 *
 * MAC filter entries from list were slated to be added to device. Returns
 * number of successful filters. Note that 0 does NOT mean success!
 **/
static int
i40e_update_filter_state(int count,
                         struct i40e_aqc_add_macvlan_element_data *add_list,
                         struct i40e_new_mac_filter *add_head)
{
        int retval = 0;
        int i;

        for (i = 0; i < count; i++) {
                /* Always check status of each filter. We don't need to check
                 * the firmware return status because we pre-set the filter
                 * status to I40E_AQC_MM_ERR_NO_RES when sending the filter
                 * request to the adminq. Thus, if it no longer matches then
                 * we know the filter is active.
                 */
                if (add_list[i].match_method == I40E_AQC_MM_ERR_NO_RES) {
                        add_head->state = I40E_FILTER_FAILED;
                } else {
                        add_head->state = I40E_FILTER_ACTIVE;
                        retval++;
                }

                add_head = i40e_next_filter(add_head);
                if (!add_head)
                        break;
        }

        return retval;
}

/**
 * i40e_aqc_del_filters - Request firmware to delete a set of filters
 * @vsi: ptr to the VSI
 * @vsi_name: name to display in messages
 * @list: the list of filters to send to firmware
 * @num_del: the number of filters to delete
 * @retval: Set to -EIO on failure to delete
 *
 * Send a request to firmware via AdminQ to delete a set of filters. Uses
 * *retval instead of a return value so that success does not force ret_val to
 * be set to 0. This ensures that a sequence of calls to this function
 * preserve the previous value of *retval on successful delete.
 */
static
void i40e_aqc_del_filters(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_aqc_remove_macvlan_element_data *list,
                          int num_del, int *retval)
{
        struct i40e_hw *hw = &vsi->back->hw;
        i40e_status aq_ret;
        int aq_err;

        aq_ret = i40e_aq_remove_macvlan(hw, vsi->seid, list, num_del, NULL);
        aq_err = hw->aq.asq_last_status;

        /* Explicitly ignore and do not report when firmware returns ENOENT */
        if (aq_ret && !(aq_err == I40E_AQ_RC_ENOENT)) {
                *retval = -EIO;
                dev_info(&vsi->back->pdev->dev,
                         "ignoring delete macvlan error on %s, err %s, aq_err %s\n",
                         vsi_name, i40e_stat_str(hw, aq_ret),
                         i40e_aq_str(hw, aq_err));
        }
}

/**
 * i40e_aqc_add_filters - Request firmware to add a set of filters
 * @vsi: ptr to the VSI
 * @vsi_name: name to display in messages
 * @list: the list of filters to send to firmware
 * @add_head: Position in the add hlist
 * @num_add: the number of filters to add
 * @promisc_change: set to true on exit if promiscuous mode was forced on
 *
 * Send a request to firmware via AdminQ to add a chunk of filters. Will set
 * promisc_changed to true if the firmware has run out of space for more
 * filters.
 */
static
void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_aqc_add_macvlan_element_data *list,
                          struct i40e_new_mac_filter *add_head,
                          int num_add, bool *promisc_changed)
{
        struct i40e_hw *hw = &vsi->back->hw;
        int aq_err, fcnt;

        i40e_aq_add_macvlan(hw, vsi->seid, list, num_add, NULL);
        aq_err = hw->aq.asq_last_status;
        fcnt = i40e_update_filter_state(num_add, list, add_head);

        if (fcnt != num_add) {
                *promisc_changed = true;
                set_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                dev_warn(&vsi->back->pdev->dev,
                         "Error %s adding RX filters on %s, promiscuous mode forced on\n",
                         i40e_aq_str(hw, aq_err),
                         vsi_name);
        }
}

/**
 * i40e_aqc_broadcast_filter - Set promiscuous broadcast flags
 * @vsi: pointer to the VSI
 * @f: filter data
 *
 * This function sets or clears the promiscuous broadcast flags for VLAN
 * filters in order to properly receive broadcast frames. Assumes that only
 * broadcast filters are passed.
 *
 * Returns status indicating success or failure;
 **/
static i40e_status
i40e_aqc_broadcast_filter(struct i40e_vsi *vsi, const char *vsi_name,
                          struct i40e_mac_filter *f)
{
        bool enable = f->state == I40E_FILTER_NEW;
        struct i40e_hw *hw = &vsi->back->hw;
        i40e_status aq_ret;

        if (f->vlan == I40E_VLAN_ANY) {
                aq_ret = i40e_aq_set_vsi_broadcast(hw,
                                                   vsi->seid,
                                                   enable,
                                                   NULL);
        } else {
                aq_ret = i40e_aq_set_vsi_bc_promisc_on_vlan(hw,
                                                            vsi->seid,
                                                            enable,
                                                            f->vlan,
                                                            NULL);
        }

        if (aq_ret)
                dev_warn(&vsi->back->pdev->dev,
                         "Error %s setting broadcast promiscuous mode on %s\n",
                         i40e_aq_str(hw, hw->aq.asq_last_status),
                         vsi_name);

        return aq_ret;
}

/**
 * i40e_sync_vsi_filters - Update the VSI filter list to the HW
 * @vsi: ptr to the VSI
 *
 * Push any outstanding VSI filter changes through the AdminQ.
 *
 * Returns 0 or error value
 **/
int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
{
        struct hlist_head tmp_add_list, tmp_del_list;
        struct i40e_mac_filter *f;
        struct i40e_new_mac_filter *new, *add_head = NULL;
        struct i40e_hw *hw = &vsi->back->hw;
        unsigned int failed_filters = 0;
        unsigned int vlan_filters = 0;
        bool promisc_changed = false;
        char vsi_name[16] = "PF";
        int filter_list_len = 0;
        i40e_status aq_ret = 0;
        u32 changed_flags = 0;
        struct hlist_node *h;
        struct i40e_pf *pf;
        int num_add = 0;
        int num_del = 0;
        int retval = 0;
        u16 cmd_flags;
        int list_size;
        int bkt;

        /* empty array typed pointers, kcalloc later */
        struct i40e_aqc_add_macvlan_element_data *add_list;
        struct i40e_aqc_remove_macvlan_element_data *del_list;

        while (test_and_set_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state))
                usleep_range(1000, 2000);
        pf = vsi->back;

        if (vsi->netdev) {
                changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
                vsi->current_netdev_flags = vsi->netdev->flags;
        }

        INIT_HLIST_HEAD(&tmp_add_list);
        INIT_HLIST_HEAD(&tmp_del_list);

        if (vsi->type == I40E_VSI_SRIOV)
                snprintf(vsi_name, sizeof(vsi_name) - 1, "VF %d", vsi->vf_id);
        else if (vsi->type != I40E_VSI_MAIN)
                snprintf(vsi_name, sizeof(vsi_name) - 1, "vsi %d", vsi->seid);

        if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
                vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;

                spin_lock_bh(&vsi->mac_filter_hash_lock);
                /* Create a list of filters to delete. */
                hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                        if (f->state == I40E_FILTER_REMOVE) {
                                /* Move the element into temporary del_list */
                                hash_del(&f->hlist);
                                hlist_add_head(&f->hlist, &tmp_del_list);

                                /* Avoid counting removed filters */
                                continue;
                        }
                        if (f->state == I40E_FILTER_NEW) {
                                /* Create a temporary i40e_new_mac_filter */
                                new = kzalloc(sizeof(*new), GFP_ATOMIC);
                                if (!new)
                                        goto err_no_memory_locked;

                                /* Store pointer to the real filter */
                                new->f = f;
                                new->state = f->state;

                                /* Add it to the hash list */
                                hlist_add_head(&new->hlist, &tmp_add_list);
                        }

                        /* Count the number of active (current and new) VLAN
                         * filters we have now. Does not count filters which
                         * are marked for deletion.
                         */
                        if (f->vlan > 0)
                                vlan_filters++;
                }

                retval = i40e_correct_mac_vlan_filters(vsi,
                                                       &tmp_add_list,
                                                       &tmp_del_list,
                                                       vlan_filters);
                if (retval)
                        goto err_no_memory_locked;

                spin_unlock_bh(&vsi->mac_filter_hash_lock);
        }

        /* Now process 'del_list' outside the lock */
        if (!hlist_empty(&tmp_del_list)) {
                filter_list_len = hw->aq.asq_buf_size /
                            sizeof(struct i40e_aqc_remove_macvlan_element_data);
                list_size = filter_list_len *
                            sizeof(struct i40e_aqc_remove_macvlan_element_data);
                del_list = kzalloc(list_size, GFP_ATOMIC);
                if (!del_list)
                        goto err_no_memory;

                hlist_for_each_entry_safe(f, h, &tmp_del_list, hlist) {
                        cmd_flags = 0;

                        /* handle broadcast filters by updating the broadcast
                         * promiscuous flag and release filter list.
                         */
                        if (is_broadcast_ether_addr(f->macaddr)) {
                                i40e_aqc_broadcast_filter(vsi, vsi_name, f);

                                hlist_del(&f->hlist);
                                kfree(f);
                                continue;
                        }

                        /* add to delete list */
                        ether_addr_copy(del_list[num_del].mac_addr, f->macaddr);
                        if (f->vlan == I40E_VLAN_ANY) {
                                del_list[num_del].vlan_tag = 0;
                                cmd_flags |= I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
                        } else {
                                del_list[num_del].vlan_tag =
                                        cpu_to_le16((u16)(f->vlan));
                        }

                        cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
                        del_list[num_del].flags = cmd_flags;
                        num_del++;

                        /* flush a full buffer */
                        if (num_del == filter_list_len) {
                                i40e_aqc_del_filters(vsi, vsi_name, del_list,
                                                     num_del, &retval);
                                memset(del_list, 0, list_size);
                                num_del = 0;
                        }
                        /* Release memory for MAC filter entries which were
                         * synced up with HW.
                         */
                        hlist_del(&f->hlist);
                        kfree(f);
                }

                if (num_del) {
                        i40e_aqc_del_filters(vsi, vsi_name, del_list,
                                             num_del, &retval);
                }

                kfree(del_list);
                del_list = NULL;
        }

        if (!hlist_empty(&tmp_add_list)) {
                /* Do all the adds now. */
                filter_list_len = hw->aq.asq_buf_size /
                               sizeof(struct i40e_aqc_add_macvlan_element_data);
                list_size = filter_list_len *
                               sizeof(struct i40e_aqc_add_macvlan_element_data);
                add_list = kzalloc(list_size, GFP_ATOMIC);
                if (!add_list)
                        goto err_no_memory;

                num_add = 0;
                hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
                        if (test_bit(__I40E_VSI_OVERFLOW_PROMISC,
                                     vsi->state)) {
                                new->state = I40E_FILTER_FAILED;
                                continue;
                        }

                        /* handle broadcast filters by updating the broadcast
                         * promiscuous flag instead of adding a MAC filter.
                         */
                        if (is_broadcast_ether_addr(new->f->macaddr)) {
                                if (i40e_aqc_broadcast_filter(vsi, vsi_name,
                                                              new->f))
                                        new->state = I40E_FILTER_FAILED;
                                else
                                        new->state = I40E_FILTER_ACTIVE;
                                continue;
                        }

                        /* add to add array */
                        if (num_add == 0)
                                add_head = new;
                        cmd_flags = 0;
                        ether_addr_copy(add_list[num_add].mac_addr,
                                        new->f->macaddr);
                        if (new->f->vlan == I40E_VLAN_ANY) {
                                add_list[num_add].vlan_tag = 0;
                                cmd_flags |= I40E_AQC_MACVLAN_ADD_IGNORE_VLAN;
                        } else {
                                add_list[num_add].vlan_tag =
                                        cpu_to_le16((u16)(new->f->vlan));
                        }
                        add_list[num_add].queue_number = 0;
                        /* set invalid match method for later detection */
                        add_list[num_add].match_method = I40E_AQC_MM_ERR_NO_RES;
                        cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
                        add_list[num_add].flags = cpu_to_le16(cmd_flags);
                        num_add++;

                        /* flush a full buffer */
                        if (num_add == filter_list_len) {
                                i40e_aqc_add_filters(vsi, vsi_name, add_list,
                                                     add_head, num_add,
                                                     &promisc_changed);
                                memset(add_list, 0, list_size);
                                num_add = 0;
                        }
                }
                if (num_add) {
                        i40e_aqc_add_filters(vsi, vsi_name, add_list, add_head,
                                             num_add, &promisc_changed);
                }
                /* Now move all of the filters from the temp add list back to
                 * the VSI's list.
                 */
                spin_lock_bh(&vsi->mac_filter_hash_lock);
                hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
                        /* Only update the state if we're still NEW */
                        if (new->f->state == I40E_FILTER_NEW)
                                new->f->state = new->state;
                        hlist_del(&new->hlist);
                        kfree(new);
                }
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
                kfree(add_list);
                add_list = NULL;
        }

        /* Determine the number of active and failed filters. */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        vsi->active_filters = 0;
        hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
                if (f->state == I40E_FILTER_ACTIVE)
                        vsi->active_filters++;
                else if (f->state == I40E_FILTER_FAILED)
                        failed_filters++;
        }
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* If promiscuous mode has changed, we need to calculate a new
         * threshold for when we are safe to exit
         */
        if (promisc_changed)
                vsi->promisc_threshold = (vsi->active_filters * 3) / 4;

        /* Check if we are able to exit overflow promiscuous mode. We can
         * safely exit if we didn't just enter, we no longer have any failed
         * filters, and we have reduced filters below the threshold value.
         */
        if (test_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state) &&
            !promisc_changed && !failed_filters &&
            (vsi->active_filters < vsi->promisc_threshold)) {
                dev_info(&pf->pdev->dev,
                         "filter logjam cleared on %s, leaving overflow promiscuous mode\n",
                         vsi_name);
                clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                promisc_changed = true;
                vsi->promisc_threshold = 0;
        }

        /* if the VF is not trusted do not do promisc */
        if ((vsi->type == I40E_VSI_SRIOV) && !pf->vf[vsi->vf_id].trusted) {
                clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
                goto out;
        }

        /* check for changes in promiscuous modes */
        if (changed_flags & IFF_ALLMULTI) {
                bool cur_multipromisc;

                cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
                aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
                                                               vsi->seid,
                                                               cur_multipromisc,
                                                               NULL);
                if (aq_ret) {
                        retval = i40e_aq_rc_to_posix(aq_ret,
                                                     hw->aq.asq_last_status);
                        dev_info(&pf->pdev->dev,
                                 "set multi promisc failed on %s, err %s aq_err %s\n",
                                 vsi_name,
                                 i40e_stat_str(hw, aq_ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                }
        }

        if ((changed_flags & IFF_PROMISC) || promisc_changed) {
                bool cur_promisc;

                cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
                               test_bit(__I40E_VSI_OVERFLOW_PROMISC,
                                        vsi->state));
                if ((vsi->type == I40E_VSI_MAIN) &&
                    (pf->lan_veb != I40E_NO_VEB) &&
                    !(pf->flags & I40E_FLAG_MFP_ENABLED)) {
                        /* set defport ON for Main VSI instead of true promisc
                         * this way we will get all unicast/multicast and VLAN
                         * promisc behavior but will not get VF or VMDq traffic
                         * replicated on the Main VSI.
                         */
                        if (pf->cur_promisc != cur_promisc) {
                                pf->cur_promisc = cur_promisc;
                                if (cur_promisc)
                                        aq_ret =
                                              i40e_aq_set_default_vsi(hw,
                                                                      vsi->seid,
                                                                      NULL);
                                else
                                        aq_ret =
                                            i40e_aq_clear_default_vsi(hw,
                                                                      vsi->seid,
                                                                      NULL);
                                if (aq_ret) {
                                        retval = i40e_aq_rc_to_posix(aq_ret,
                                                        hw->aq.asq_last_status);
                                        dev_info(&pf->pdev->dev,
                                                 "Set default VSI failed on %s, err %s, aq_err %s\n",
                                                 vsi_name,
                                                 i40e_stat_str(hw, aq_ret),
                                                 i40e_aq_str(hw,
                                                     hw->aq.asq_last_status));
                                }
                        }
                } else {
                        aq_ret = i40e_aq_set_vsi_unicast_promiscuous(
                                                          hw,
                                                          vsi->seid,
                                                          cur_promisc, NULL,
                                                          true);
                        if (aq_ret) {
                                retval =
                                i40e_aq_rc_to_posix(aq_ret,
                                                    hw->aq.asq_last_status);
                                dev_info(&pf->pdev->dev,
                                         "set unicast promisc failed on %s, err %s, aq_err %s\n",
                                         vsi_name,
                                         i40e_stat_str(hw, aq_ret),
                                         i40e_aq_str(hw,
                                                     hw->aq.asq_last_status));
                        }
                        aq_ret = i40e_aq_set_vsi_multicast_promiscuous(
                                                          hw,
                                                          vsi->seid,
                                                          cur_promisc, NULL);
                        if (aq_ret) {
                                retval =
                                i40e_aq_rc_to_posix(aq_ret,
                                                    hw->aq.asq_last_status);
                                dev_info(&pf->pdev->dev,
                                         "set multicast promisc failed on %s, err %s, aq_err %s\n",
                                         vsi_name,
                                         i40e_stat_str(hw, aq_ret),
                                         i40e_aq_str(hw,
                                                     hw->aq.asq_last_status));
                        }
                }
                aq_ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
                                                   vsi->seid,
                                                   cur_promisc, NULL);
                if (aq_ret) {
                        retval = i40e_aq_rc_to_posix(aq_ret,
                                                     pf->hw.aq.asq_last_status);
                        dev_info(&pf->pdev->dev,
                                 "set brdcast promisc failed, err %s, aq_err %s\n",
                                         i40e_stat_str(hw, aq_ret),
                                         i40e_aq_str(hw,
                                                     hw->aq.asq_last_status));
                }
        }
out:
        /* if something went wrong then set the changed flag so we try again */
        if (retval)
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;

        clear_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state);
        return retval;

err_no_memory:
        /* Restore elements on the temporary add and delete lists */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
err_no_memory_locked:
        i40e_undo_del_filter_entries(vsi, &tmp_del_list);
        i40e_undo_add_filter_entries(vsi, &tmp_add_list);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
        clear_bit(__I40E_VSI_SYNCING_FILTERS, vsi->state);
        return -ENOMEM;
}

/**
 * i40e_sync_filters_subtask - Sync the VSI filter list with HW
 * @pf: board private structure
 **/
static void i40e_sync_filters_subtask(struct i40e_pf *pf)
{
        int v;

        if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
                return;
        pf->flags &= ~I40E_FLAG_FILTER_SYNC;

        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (pf->vsi[v] &&
                    (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED)) {
                        int ret = i40e_sync_vsi_filters(pf->vsi[v]);

                        if (ret) {
                                /* come back and try again later */
                                pf->flags |= I40E_FLAG_FILTER_SYNC;
                                break;
                        }
                }
        }
}

/**
 * i40e_max_xdp_frame_size - returns the maximum allowed frame size for XDP
 * @vsi: the vsi
 **/
static int i40e_max_xdp_frame_size(struct i40e_vsi *vsi)
{
        if (PAGE_SIZE >= 8192 || (vsi->back->flags & I40E_FLAG_LEGACY_RX))
                return I40E_RXBUFFER_2048;
        else
                return I40E_RXBUFFER_3072;
}

/**
 * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
 * @netdev: network interface device structure
 * @new_mtu: new value for maximum frame size
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;

        if (i40e_enabled_xdp_vsi(vsi)) {
                int frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;

                if (frame_size > i40e_max_xdp_frame_size(vsi))
                        return -EINVAL;
        }

        netdev_info(netdev, "changing MTU from %d to %d\n",
                    netdev->mtu, new_mtu);
        netdev->mtu = new_mtu;
        if (netif_running(netdev))
                i40e_vsi_reinit_locked(vsi);
        pf->flags |= (I40E_FLAG_SERVICE_CLIENT_REQUESTED |
                      I40E_FLAG_CLIENT_L2_CHANGE);
        return 0;
}

/**
 * i40e_ioctl - Access the hwtstamp interface
 * @netdev: network interface device structure
 * @ifr: interface request data
 * @cmd: ioctl command
 **/
int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_pf *pf = np->vsi->back;

        switch (cmd) {
        case SIOCGHWTSTAMP:
                return i40e_ptp_get_ts_config(pf, ifr);
        case SIOCSHWTSTAMP:
                return i40e_ptp_set_ts_config(pf, ifr);
        default:
                return -EOPNOTSUPP;
        }
}

/**
 * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
 * @vsi: the vsi being adjusted
 **/
void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
{
        struct i40e_vsi_context ctxt;
        i40e_status ret;

        if ((vsi->info.valid_sections &
             cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
            ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
                return;  /* already enabled */

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
                                    I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "update vlan stripping failed, err %s aq_err %s\n",
                         i40e_stat_str(&vsi->back->hw, ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
        }
}

/**
 * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
 * @vsi: the vsi being adjusted
 **/
void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
{
        struct i40e_vsi_context ctxt;
        i40e_status ret;

        if ((vsi->info.valid_sections &
             cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
            ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
             I40E_AQ_VSI_PVLAN_EMOD_MASK))
                return;  /* already disabled */

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
                                    I40E_AQ_VSI_PVLAN_EMOD_NOTHING;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "update vlan stripping failed, err %s aq_err %s\n",
                         i40e_stat_str(&vsi->back->hw, ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
        }
}

/**
 * i40e_vlan_rx_register - Setup or shutdown vlan offload
 * @netdev: network interface to be adjusted
 * @features: netdev features to test if VLAN offload is enabled or not
 **/
static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        if (features & NETIF_F_HW_VLAN_CTAG_RX)
                i40e_vlan_stripping_enable(vsi);
        else
                i40e_vlan_stripping_disable(vsi);
}

/**
 * i40e_add_vlan_all_mac - Add a MAC/VLAN filter for each existing MAC address
 * @vsi: the vsi being configured
 * @vid: vlan id to be added (0 = untagged only , -1 = any)
 *
 * This is a helper function for adding a new MAC/VLAN filter with the
 * specified VLAN for each existing MAC address already in the hash table.
 * This function does *not* perform any accounting to update filters based on
 * VLAN mode.
 *
 * NOTE: this function expects to be called while under the
 * mac_filter_hash_lock
 **/
int i40e_add_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
{
        struct i40e_mac_filter *f, *add_f;
        struct hlist_node *h;
        int bkt;

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->state == I40E_FILTER_REMOVE)
                        continue;
                add_f = i40e_add_filter(vsi, f->macaddr, vid);
                if (!add_f) {
                        dev_info(&vsi->back->pdev->dev,
                                 "Could not add vlan filter %d for %pM\n",
                                 vid, f->macaddr);
                        return -ENOMEM;
                }
        }

        return 0;
}

/**
 * i40e_vsi_add_vlan - Add VSI membership for given VLAN
 * @vsi: the VSI being configured
 * @vid: VLAN id to be added
 **/
int i40e_vsi_add_vlan(struct i40e_vsi *vsi, u16 vid)
{
        int err;

        if (vsi->info.pvid)
                return -EINVAL;

        /* The network stack will attempt to add VID=0, with the intention to
         * receive priority tagged packets with a VLAN of 0. Our HW receives
         * these packets by default when configured to receive untagged
         * packets, so we don't need to add a filter for this case.
         * Additionally, HW interprets adding a VID=0 filter as meaning to
         * receive *only* tagged traffic and stops receiving untagged traffic.
         * Thus, we do not want to actually add a filter for VID=0
         */
        if (!vid)
                return 0;

        /* Locked once because all functions invoked below iterates list*/
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        err = i40e_add_vlan_all_mac(vsi, vid);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);
        if (err)
                return err;

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
        return 0;
}

/**
 * i40e_rm_vlan_all_mac - Remove MAC/VLAN pair for all MAC with the given VLAN
 * @vsi: the vsi being configured
 * @vid: vlan id to be removed (0 = untagged only , -1 = any)
 *
 * This function should be used to remove all VLAN filters which match the
 * given VID. It does not schedule the service event and does not take the
 * mac_filter_hash_lock so it may be combined with other operations under
 * a single invocation of the mac_filter_hash_lock.
 *
 * NOTE: this function expects to be called while under the
 * mac_filter_hash_lock
 */
void i40e_rm_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;

        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->vlan == vid)
                        __i40e_del_filter(vsi, f);
        }
}

/**
 * i40e_vsi_kill_vlan - Remove VSI membership for given VLAN
 * @vsi: the VSI being configured
 * @vid: VLAN id to be removed
 **/
void i40e_vsi_kill_vlan(struct i40e_vsi *vsi, u16 vid)
{
        if (!vid || vsi->info.pvid)
                return;

        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_rm_vlan_all_mac(vsi, vid);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
}

/**
 * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
 * @netdev: network interface to be adjusted
 * @vid: vlan id to be added
 *
 * net_device_ops implementation for adding vlan ids
 **/
static int i40e_vlan_rx_add_vid(struct net_device *netdev,
                                __always_unused __be16 proto, u16 vid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        int ret = 0;

        if (vid >= VLAN_N_VID)
                return -EINVAL;

        ret = i40e_vsi_add_vlan(vsi, vid);
        if (!ret)
                set_bit(vid, vsi->active_vlans);

        return ret;
}

/**
 * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
 * @netdev: network interface to be adjusted
 * @vid: vlan id to be removed
 *
 * net_device_ops implementation for removing vlan ids
 **/
static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
                                 __always_unused __be16 proto, u16 vid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        /* return code is ignored as there is nothing a user
         * can do about failure to remove and a log message was
         * already printed from the other function
         */
        i40e_vsi_kill_vlan(vsi, vid);

        clear_bit(vid, vsi->active_vlans);

        return 0;
}

/**
 * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
 * @vsi: the vsi being brought back up
 **/
static void i40e_restore_vlan(struct i40e_vsi *vsi)
{
        u16 vid;

        if (!vsi->netdev)
                return;

        i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);

        for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
                i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
                                     vid);
}

/**
 * i40e_vsi_add_pvid - Add pvid for the VSI
 * @vsi: the vsi being adjusted
 * @vid: the vlan id to set as a PVID
 **/
int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
{
        struct i40e_vsi_context ctxt;
        i40e_status ret;

        vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
        vsi->info.pvid = cpu_to_le16(vid);
        vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
                                    I40E_AQ_VSI_PVLAN_INSERT_PVID |
                                    I40E_AQ_VSI_PVLAN_EMOD_STR;

        ctxt.seid = vsi->seid;
        ctxt.info = vsi->info;
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "add pvid failed, err %s aq_err %s\n",
                         i40e_stat_str(&vsi->back->hw, ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
                return -ENOENT;
        }

        return 0;
}

/**
 * i40e_vsi_remove_pvid - Remove the pvid from the VSI
 * @vsi: the vsi being adjusted
 *
 * Just use the vlan_rx_register() service to put it back to normal
 **/
void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
{
        i40e_vlan_stripping_disable(vsi);

        vsi->info.pvid = 0;
}

/**
 * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
 * @vsi: ptr to the VSI
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
{
        int i, err = 0;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);

        if (!i40e_enabled_xdp_vsi(vsi))
                return err;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_tx_descriptors(vsi->xdp_rings[i]);

        return err;
}

/**
 * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
 * @vsi: ptr to the VSI
 *
 * Free VSI's transmit software resources
 **/
static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
{
        int i;

        if (vsi->tx_rings) {
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
                                i40e_free_tx_resources(vsi->tx_rings[i]);
        }

        if (vsi->xdp_rings) {
                for (i = 0; i < vsi->num_queue_pairs; i++)
                        if (vsi->xdp_rings[i] && vsi->xdp_rings[i]->desc)
                                i40e_free_tx_resources(vsi->xdp_rings[i]);
        }
}

/**
 * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
 * @vsi: ptr to the VSI
 *
 * If this function returns with an error, then it's possible one or
 * more of the rings is populated (while the rest are not).  It is the
 * callers duty to clean those orphaned rings.
 *
 * Return 0 on success, negative on failure
 **/
static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
{
        int i, err = 0;

        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
        return err;
}

/**
 * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
 * @vsi: ptr to the VSI
 *
 * Free all receive software resources
 **/
static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
{
        int i;

        if (!vsi->rx_rings)
                return;

        for (i = 0; i < vsi->num_queue_pairs; i++)
                if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
                        i40e_free_rx_resources(vsi->rx_rings[i]);
}

/**
 * i40e_config_xps_tx_ring - Configure XPS for a Tx ring
 * @ring: The Tx ring to configure
 *
 * This enables/disables XPS for a given Tx descriptor ring
 * based on the TCs enabled for the VSI that ring belongs to.
 **/
static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
{
        struct i40e_vsi *vsi = ring->vsi;
        int cpu;

        if (!ring->q_vector || !ring->netdev)
                return;

        if ((vsi->tc_config.numtc <= 1) &&
            !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state)) {
                cpu = cpumask_local_spread(ring->q_vector->v_idx, -1);
                netif_set_xps_queue(ring->netdev, get_cpu_mask(cpu),
                                    ring->queue_index);
        }

        /* schedule our worker thread which will take care of
         * applying the new filter changes
         */
        i40e_service_event_schedule(vsi->back);
}

/**
 * i40e_configure_tx_ring - Configure a transmit ring context and rest
 * @ring: The Tx ring to configure
 *
 * Configure the Tx descriptor ring in the HMC context.
 **/
static int i40e_configure_tx_ring(struct i40e_ring *ring)
{
        struct i40e_vsi *vsi = ring->vsi;
        u16 pf_q = vsi->base_queue + ring->queue_index;
        struct i40e_hw *hw = &vsi->back->hw;
        struct i40e_hmc_obj_txq tx_ctx;
        i40e_status err = 0;
        u32 qtx_ctl = 0;

        /* some ATR related tx ring init */
        if (vsi->back->flags & I40E_FLAG_FD_ATR_ENABLED) {
                ring->atr_sample_rate = vsi->back->atr_sample_rate;
                ring->atr_count = 0;
        } else {
                ring->atr_sample_rate = 0;
        }

        /* configure XPS */
        i40e_config_xps_tx_ring(ring);

        /* clear the context structure first */
        memset(&tx_ctx, 0, sizeof(tx_ctx));

        tx_ctx.new_context = 1;
        tx_ctx.base = (ring->dma / 128);
        tx_ctx.qlen = ring->count;
        tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FD_SB_ENABLED |
                                               I40E_FLAG_FD_ATR_ENABLED));
        tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP);
        /* FDIR VSI tx ring can still use RS bit and writebacks */
        if (vsi->type != I40E_VSI_FDIR)
                tx_ctx.head_wb_ena = 1;
        tx_ctx.head_wb_addr = ring->dma +
                              (ring->count * sizeof(struct i40e_tx_desc));

        /* As part of VSI creation/update, FW allocates certain
         * Tx arbitration queue sets for each TC enabled for
         * the VSI. The FW returns the handles to these queue
         * sets as part of the response buffer to Add VSI,
         * Update VSI, etc. AQ commands. It is expected that
         * these queue set handles be associated with the Tx
         * queues by the driver as part of the TX queue context
         * initialization. This has to be done regardless of
         * DCB as by default everything is mapped to TC0.
         */
        tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
        tx_ctx.rdylist_act = 0;

        /* clear the context in the HMC */
        err = i40e_clear_lan_tx_queue_context(hw, pf_q);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* set the context in the HMC */
        err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* Now associate this queue with this PCI function */
        if (vsi->type == I40E_VSI_VMDQ2) {
                qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
                qtx_ctl |= ((vsi->id) << I40E_QTX_CTL_VFVM_INDX_SHIFT) &
                           I40E_QTX_CTL_VFVM_INDX_MASK;
        } else {
                qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
        }

        qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
                    I40E_QTX_CTL_PF_INDX_MASK);
        wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
        i40e_flush(hw);

        /* cache tail off for easier writes later */
        ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);

        return 0;
}

/**
 * i40e_configure_rx_ring - Configure a receive ring context
 * @ring: The Rx ring to configure
 *
 * Configure the Rx descriptor ring in the HMC context.
 **/
static int i40e_configure_rx_ring(struct i40e_ring *ring)
{
        struct i40e_vsi *vsi = ring->vsi;
        u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
        u16 pf_q = vsi->base_queue + ring->queue_index;
        struct i40e_hw *hw = &vsi->back->hw;
        struct i40e_hmc_obj_rxq rx_ctx;
        i40e_status err = 0;

        ring->state = 0;

        /* clear the context structure first */
        memset(&rx_ctx, 0, sizeof(rx_ctx));

        ring->rx_buf_len = vsi->rx_buf_len;

        rx_ctx.dbuff = DIV_ROUND_UP(ring->rx_buf_len,
                                    BIT_ULL(I40E_RXQ_CTX_DBUFF_SHIFT));

        rx_ctx.base = (ring->dma / 128);
        rx_ctx.qlen = ring->count;

        /* use 32 byte descriptors */
        rx_ctx.dsize = 1;

        /* descriptor type is always zero
         * rx_ctx.dtype = 0;
         */
        rx_ctx.hsplit_0 = 0;

        rx_ctx.rxmax = min_t(u16, vsi->max_frame, chain_len * ring->rx_buf_len);
        if (hw->revision_id == 0)
                rx_ctx.lrxqthresh = 0;
        else
                rx_ctx.lrxqthresh = 2;
        rx_ctx.crcstrip = 1;
        rx_ctx.l2tsel = 1;
        /* this controls whether VLAN is stripped from inner headers */
        rx_ctx.showiv = 0;
        /* set the prefena field to 1 because the manual says to */
        rx_ctx.prefena = 1;

        /* clear the context in the HMC */
        err = i40e_clear_lan_rx_queue_context(hw, pf_q);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* set the context in the HMC */
        err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
        if (err) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
                         ring->queue_index, pf_q, err);
                return -ENOMEM;
        }

        /* configure Rx buffer alignment */
        if (!vsi->netdev || (vsi->back->flags & I40E_FLAG_LEGACY_RX))
                clear_ring_build_skb_enabled(ring);
        else
                set_ring_build_skb_enabled(ring);

        /* cache tail for quicker writes, and clear the reg before use */
        ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
        writel(0, ring->tail);

        i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));

        return 0;
}

/**
 * i40e_vsi_configure_tx - Configure the VSI for Tx
 * @vsi: VSI structure describing this set of rings and resources
 *
 * Configure the Tx VSI for operation.
 **/
static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
{
        int err = 0;
        u16 i;

        for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
                err = i40e_configure_tx_ring(vsi->tx_rings[i]);

        if (!i40e_enabled_xdp_vsi(vsi))
                return err;

        for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
                err = i40e_configure_tx_ring(vsi->xdp_rings[i]);

        return err;
}

/**
 * i40e_vsi_configure_rx - Configure the VSI for Rx
 * @vsi: the VSI being configured
 *
 * Configure the Rx VSI for operation.
 **/
static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
{
        int err = 0;
        u16 i;

        if (!vsi->netdev || (vsi->back->flags & I40E_FLAG_LEGACY_RX)) {
                vsi->max_frame = I40E_MAX_RXBUFFER;
                vsi->rx_buf_len = I40E_RXBUFFER_2048;
#if (PAGE_SIZE < 8192)
        } else if (!I40E_2K_TOO_SMALL_WITH_PADDING &&
                   (vsi->netdev->mtu <= ETH_DATA_LEN)) {
                vsi->max_frame = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
                vsi->rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
#endif
        } else {
                vsi->max_frame = I40E_MAX_RXBUFFER;
                vsi->rx_buf_len = (PAGE_SIZE < 8192) ? I40E_RXBUFFER_3072 :
                                                       I40E_RXBUFFER_2048;
        }

        /* set up individual rings */
        for (i = 0; i < vsi->num_queue_pairs && !err; i++)
                err = i40e_configure_rx_ring(vsi->rx_rings[i]);

        return err;
}

/**
 * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
 * @vsi: ptr to the VSI
 **/
static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
{
        struct i40e_ring *tx_ring, *rx_ring;
        u16 qoffset, qcount;
        int i, n;

        if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
                /* Reset the TC information */
                for (i = 0; i < vsi->num_queue_pairs; i++) {
                        rx_ring = vsi->rx_rings[i];
                        tx_ring = vsi->tx_rings[i];
                        rx_ring->dcb_tc = 0;
                        tx_ring->dcb_tc = 0;
                }
        }

        for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
                if (!(vsi->tc_config.enabled_tc & BIT_ULL(n)))
                        continue;

                qoffset = vsi->tc_config.tc_info[n].qoffset;
                qcount = vsi->tc_config.tc_info[n].qcount;
                for (i = qoffset; i < (qoffset + qcount); i++) {
                        rx_ring = vsi->rx_rings[i];
                        tx_ring = vsi->tx_rings[i];
                        rx_ring->dcb_tc = n;
                        tx_ring->dcb_tc = n;
                }
        }
}

/**
 * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
 * @vsi: ptr to the VSI
 **/
static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
{
        if (vsi->netdev)
                i40e_set_rx_mode(vsi->netdev);
}

/**
 * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
 * @vsi: Pointer to the targeted VSI
 *
 * This function replays the hlist on the hw where all the SB Flow Director
 * filters were saved.
 **/
static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
{
        struct i40e_fdir_filter *filter;
        struct i40e_pf *pf = vsi->back;
        struct hlist_node *node;

        if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
                return;

        /* Reset FDir counters as we're replaying all existing filters */
        pf->fd_tcp4_filter_cnt = 0;
        pf->fd_udp4_filter_cnt = 0;
        pf->fd_sctp4_filter_cnt = 0;
        pf->fd_ip4_filter_cnt = 0;

        hlist_for_each_entry_safe(filter, node,
                                  &pf->fdir_filter_list, fdir_node) {
                i40e_add_del_fdir(vsi, filter, true);
        }
}

/**
 * i40e_vsi_configure - Set up the VSI for action
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_configure(struct i40e_vsi *vsi)
{
        int err;

        i40e_set_vsi_rx_mode(vsi);
        i40e_restore_vlan(vsi);
        i40e_vsi_config_dcb_rings(vsi);
        err = i40e_vsi_configure_tx(vsi);
        if (!err)
                err = i40e_vsi_configure_rx(vsi);

        return err;
}

/**
 * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
 * @vsi: the VSI being configured
 **/
static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
{
        bool has_xdp = i40e_enabled_xdp_vsi(vsi);
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vector;
        int i, q;
        u32 qp;

        /* The interrupt indexing is offset by 1 in the PFINT_ITRn
         * and PFINT_LNKLSTn registers, e.g.:
         *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
         */
        qp = vsi->base_queue;
        vector = vsi->base_vector;
        for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[i];

                q_vector->itr_countdown = ITR_COUNTDOWN_START;
                q_vector->rx.itr = ITR_TO_REG(vsi->rx_rings[i]->rx_itr_setting);
                q_vector->rx.latency_range = I40E_LOW_LATENCY;
                wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
                     q_vector->rx.itr);
                q_vector->tx.itr = ITR_TO_REG(vsi->tx_rings[i]->tx_itr_setting);
                q_vector->tx.latency_range = I40E_LOW_LATENCY;
                wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
                     q_vector->tx.itr);
                wr32(hw, I40E_PFINT_RATEN(vector - 1),
                     i40e_intrl_usec_to_reg(vsi->int_rate_limit));

                /* Linked list for the queuepairs assigned to this vector */
                wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
                for (q = 0; q < q_vector->num_ringpairs; q++) {
                        u32 nextqp = has_xdp ? qp + vsi->alloc_queue_pairs : qp;
                        u32 val;

                        val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
                              (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
                              (vector << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
                              (nextqp << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT) |
                              (I40E_QUEUE_TYPE_TX <<
                               I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);

                        wr32(hw, I40E_QINT_RQCTL(qp), val);

                        if (has_xdp) {
                                val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
                                      (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
                                      (vector << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
                                      (qp << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT) |
                                      (I40E_QUEUE_TYPE_TX <<
                                       I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

                                wr32(hw, I40E_QINT_TQCTL(nextqp), val);
                        }

                        val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
                              (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
                              (vector << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
                              ((qp + 1) << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT) |
                              (I40E_QUEUE_TYPE_RX <<
                               I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

                        /* Terminate the linked list */
                        if (q == (q_vector->num_ringpairs - 1))
                                val |= (I40E_QUEUE_END_OF_LIST <<
                                        I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);

                        wr32(hw, I40E_QINT_TQCTL(qp), val);
                        qp++;
                }
        }

        i40e_flush(hw);
}

/**
 * i40e_enable_misc_int_causes - enable the non-queue interrupts
 * @hw: ptr to the hardware info
 **/
static void i40e_enable_misc_int_causes(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u32 val;

        /* clear things first */
        wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
        rd32(hw, I40E_PFINT_ICR0);         /* read to clear */

        val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
              I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
              I40E_PFINT_ICR0_ENA_GRST_MASK          |
              I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
              I40E_PFINT_ICR0_ENA_GPIO_MASK          |
              I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
              I40E_PFINT_ICR0_ENA_VFLR_MASK          |
              I40E_PFINT_ICR0_ENA_ADMINQ_MASK;

        if (pf->flags & I40E_FLAG_IWARP_ENABLED)
                val |= I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;

        if (pf->flags & I40E_FLAG_PTP)
                val |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;

        wr32(hw, I40E_PFINT_ICR0_ENA, val);

        /* SW_ITR_IDX = 0, but don't change INTENA */
        wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
                                        I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);

        /* OTHER_ITR_IDX = 0 */
        wr32(hw, I40E_PFINT_STAT_CTL0, 0);
}

/**
 * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
 * @vsi: the VSI being configured
 **/
static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
{
        u32 nextqp = i40e_enabled_xdp_vsi(vsi) ? vsi->alloc_queue_pairs : 0;
        struct i40e_q_vector *q_vector = vsi->q_vectors[0];
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u32 val;

        /* set the ITR configuration */
        q_vector->itr_countdown = ITR_COUNTDOWN_START;
        q_vector->rx.itr = ITR_TO_REG(vsi->rx_rings[0]->rx_itr_setting);
        q_vector->rx.latency_range = I40E_LOW_LATENCY;
        wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
        q_vector->tx.itr = ITR_TO_REG(vsi->tx_rings[0]->tx_itr_setting);
        q_vector->tx.latency_range = I40E_LOW_LATENCY;
        wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);

        i40e_enable_misc_int_causes(pf);

        /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
        wr32(hw, I40E_PFINT_LNKLST0, 0);

        /* Associate the queue pair to the vector and enable the queue int */
        val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                   |
              (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
              (nextqp      << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
              (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

        wr32(hw, I40E_QINT_RQCTL(0), val);

        if (i40e_enabled_xdp_vsi(vsi)) {
                val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                 |
                      (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)|
                      (I40E_QUEUE_TYPE_TX
                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);

               wr32(hw, I40E_QINT_TQCTL(nextqp), val);
        }

        val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
              (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
              (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);

        wr32(hw, I40E_QINT_TQCTL(0), val);
        i40e_flush(hw);
}

/**
 * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
 * @pf: board private structure
 **/
void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;

        wr32(hw, I40E_PFINT_DYN_CTL0,
             I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
        i40e_flush(hw);
}

/**
 * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
 * @pf: board private structure
 * @clearpba: true when all pending interrupt events should be cleared
 **/
void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf, bool clearpba)
{
        struct i40e_hw *hw = &pf->hw;
        u32 val;

        val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
              (clearpba ? I40E_PFINT_DYN_CTL0_CLEARPBA_MASK : 0) |
              (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);

        wr32(hw, I40E_PFINT_DYN_CTL0, val);
        i40e_flush(hw);
}

/**
 * i40e_msix_clean_rings - MSIX mode Interrupt Handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
{
        struct i40e_q_vector *q_vector = data;

        if (!q_vector->tx.ring && !q_vector->rx.ring)
                return IRQ_HANDLED;

        napi_schedule_irqoff(&q_vector->napi);

        return IRQ_HANDLED;
}

/**
 * i40e_irq_affinity_notify - Callback for affinity changes
 * @notify: context as to what irq was changed
 * @mask: the new affinity mask
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * so that we may register to receive changes to the irq affinity masks.
 **/
static void i40e_irq_affinity_notify(struct irq_affinity_notify *notify,
                                     const cpumask_t *mask)
{
        struct i40e_q_vector *q_vector =
                container_of(notify, struct i40e_q_vector, affinity_notify);

        cpumask_copy(&q_vector->affinity_mask, mask);
}

/**
 * i40e_irq_affinity_release - Callback for affinity notifier release
 * @ref: internal core kernel usage
 *
 * This is a callback function used by the irq_set_affinity_notifier function
 * to inform the current notification subscriber that they will no longer
 * receive notifications.
 **/
static void i40e_irq_affinity_release(struct kref *ref) {}

/**
 * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
 * @vsi: the VSI being configured
 * @basename: name for the vector
 *
 * Allocates MSI-X vectors and requests interrupts from the kernel.
 **/
static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
{
        int q_vectors = vsi->num_q_vectors;
        struct i40e_pf *pf = vsi->back;
        int base = vsi->base_vector;
        int rx_int_idx = 0;
        int tx_int_idx = 0;
        int vector, err;
        int irq_num;
        int cpu;

        for (vector = 0; vector < q_vectors; vector++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[vector];

                irq_num = pf->msix_entries[base + vector].vector;

                if (q_vector->tx.ring && q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "TxRx", rx_int_idx++);
                        tx_int_idx++;
                } else if (q_vector->rx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "rx", rx_int_idx++);
                } else if (q_vector->tx.ring) {
                        snprintf(q_vector->name, sizeof(q_vector->name) - 1,
                                 "%s-%s-%d", basename, "tx", tx_int_idx++);
                } else {
                        /* skip this unused q_vector */
                        continue;
                }
                err = request_irq(irq_num,
                                  vsi->irq_handler,
                                  0,
                                  q_vector->name,
                                  q_vector);
                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "MSIX request_irq failed, error: %d\n", err);
                        goto free_queue_irqs;
                }

                /* register for affinity change notifications */
                q_vector->affinity_notify.notify = i40e_irq_affinity_notify;
                q_vector->affinity_notify.release = i40e_irq_affinity_release;
                irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
                /* Spread affinity hints out across online CPUs.
                 *
                 * get_cpu_mask returns a static constant mask with
                 * a permanent lifetime so it's ok to pass to
                 * irq_set_affinity_hint without making a copy.
                 */
                cpu = cpumask_local_spread(q_vector->v_idx, -1);
                irq_set_affinity_hint(irq_num, get_cpu_mask(cpu));
        }

        vsi->irqs_ready = true;
        return 0;

free_queue_irqs:
        while (vector) {
                vector--;
                irq_num = pf->msix_entries[base + vector].vector;
                irq_set_affinity_notifier(irq_num, NULL);
                irq_set_affinity_hint(irq_num, NULL);
                free_irq(irq_num, &vsi->q_vectors[vector]);
        }
        return err;
}

/**
 * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
 * @vsi: the VSI being un-configured
 **/
static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int base = vsi->base_vector;
        int i;

        /* disable interrupt causation from each queue */
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                u32 val;

                val = rd32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx));
                val &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
                wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), val);

                val = rd32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx));
                val &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
                wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), val);

                if (!i40e_enabled_xdp_vsi(vsi))
                        continue;
                wr32(hw, I40E_QINT_TQCTL(vsi->xdp_rings[i]->reg_idx), 0);
        }

        /* disable each interrupt */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                for (i = vsi->base_vector;
                     i < (vsi->num_q_vectors + vsi->base_vector); i++)
                        wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);

                i40e_flush(hw);
                for (i = 0; i < vsi->num_q_vectors; i++)
                        synchronize_irq(pf->msix_entries[i + base].vector);
        } else {
                /* Legacy and MSI mode - this stops all interrupt handling */
                wr32(hw, I40E_PFINT_ICR0_ENA, 0);
                wr32(hw, I40E_PFINT_DYN_CTL0, 0);
                i40e_flush(hw);
                synchronize_irq(pf->pdev->irq);
        }
}

/**
 * i40e_vsi_enable_irq - Enable IRQ for the given VSI
 * @vsi: the VSI being configured
 **/
static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                for (i = 0; i < vsi->num_q_vectors; i++)
                        i40e_irq_dynamic_enable(vsi, i);
        } else {
                i40e_irq_dynamic_enable_icr0(pf, true);
        }

        i40e_flush(&pf->hw);
        return 0;
}

/**
 * i40e_stop_misc_vector - Stop the vector that handles non-queue events
 * @pf: board private structure
 **/
static void i40e_stop_misc_vector(struct i40e_pf *pf)
{
        /* Disable ICR 0 */
        wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
        i40e_flush(&pf->hw);
}

/**
 * i40e_intr - MSI/Legacy and non-queue interrupt handler
 * @irq: interrupt number
 * @data: pointer to a q_vector
 *
 * This is the handler used for all MSI/Legacy interrupts, and deals
 * with both queue and non-queue interrupts.  This is also used in
 * MSIX mode to handle the non-queue interrupts.
 **/
static irqreturn_t i40e_intr(int irq, void *data)
{
        struct i40e_pf *pf = (struct i40e_pf *)data;
        struct i40e_hw *hw = &pf->hw;
        irqreturn_t ret = IRQ_NONE;
        u32 icr0, icr0_remaining;
        u32 val, ena_mask;

        icr0 = rd32(hw, I40E_PFINT_ICR0);
        ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);

        /* if sharing a legacy IRQ, we might get called w/o an intr pending */
        if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
                goto enable_intr;

        /* if interrupt but no bits showing, must be SWINT */
        if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
            (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
                pf->sw_int_count++;

        if ((pf->flags & I40E_FLAG_IWARP_ENABLED) &&
            (icr0 & I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK)) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
                dev_dbg(&pf->pdev->dev, "cleared PE_CRITERR\n");
                set_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
        }

        /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
        if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
                struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
                struct i40e_q_vector *q_vector = vsi->q_vectors[0];

                /* We do not have a way to disarm Queue causes while leaving
                 * interrupt enabled for all other causes, ideally
                 * interrupt should be disabled while we are in NAPI but
                 * this is not a performance path and napi_schedule()
                 * can deal with rescheduling.
                 */
                if (!test_bit(__I40E_DOWN, pf->state))
                        napi_schedule_irqoff(&q_vector->napi);
        }

        if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
                set_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state);
                i40e_debug(&pf->hw, I40E_DEBUG_NVM, "AdminQ event\n");
        }

        if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
                set_bit(__I40E_MDD_EVENT_PENDING, pf->state);
        }

        if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
                ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
                set_bit(__I40E_VFLR_EVENT_PENDING, pf->state);
        }

        if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
                if (!test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                        set_bit(__I40E_RESET_INTR_RECEIVED, pf->state);
                ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
                val = rd32(hw, I40E_GLGEN_RSTAT);
                val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
                       >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
                if (val == I40E_RESET_CORER) {
                        pf->corer_count++;
                } else if (val == I40E_RESET_GLOBR) {
                        pf->globr_count++;
                } else if (val == I40E_RESET_EMPR) {
                        pf->empr_count++;
                        set_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state);
                }
        }

        if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
                icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
                dev_info(&pf->pdev->dev, "HMC error interrupt\n");
                dev_info(&pf->pdev->dev, "HMC error info 0x%x, HMC error data 0x%x\n",
                         rd32(hw, I40E_PFHMC_ERRORINFO),
                         rd32(hw, I40E_PFHMC_ERRORDATA));
        }

        if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
                u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);

                if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) {
                        icr0 &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
                        i40e_ptp_tx_hwtstamp(pf);
                }
        }

        /* If a critical error is pending we have no choice but to reset the
         * device.
         * Report and mask out any remaining unexpected interrupts.
         */
        icr0_remaining = icr0 & ena_mask;
        if (icr0_remaining) {
                dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
                         icr0_remaining);
                if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
                    (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
                    (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK)) {
                        dev_info(&pf->pdev->dev, "device will be reset\n");
                        set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                        i40e_service_event_schedule(pf);
                }
                ena_mask &= ~icr0_remaining;
        }
        ret = IRQ_HANDLED;

enable_intr:
        /* re-enable interrupt causes */
        wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
        if (!test_bit(__I40E_DOWN, pf->state)) {
                i40e_service_event_schedule(pf);
                i40e_irq_dynamic_enable_icr0(pf, false);
        }

        return ret;
}

/**
 * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
 * @tx_ring:  tx ring to clean
 * @budget:   how many cleans we're allowed
 *
 * Returns true if there's any budget left (e.g. the clean is finished)
 **/
static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
{
        struct i40e_vsi *vsi = tx_ring->vsi;
        u16 i = tx_ring->next_to_clean;
        struct i40e_tx_buffer *tx_buf;
        struct i40e_tx_desc *tx_desc;

        tx_buf = &tx_ring->tx_bi[i];
        tx_desc = I40E_TX_DESC(tx_ring, i);
        i -= tx_ring->count;

        do {
                struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;

                /* if next_to_watch is not set then there is no work pending */
                if (!eop_desc)
                        break;

                /* prevent any other reads prior to eop_desc */
                smp_rmb();

                /* if the descriptor isn't done, no work yet to do */
                if (!(eop_desc->cmd_type_offset_bsz &
                      cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
                        break;

                /* clear next_to_watch to prevent false hangs */
                tx_buf->next_to_watch = NULL;

                tx_desc->buffer_addr = 0;
                tx_desc->cmd_type_offset_bsz = 0;
                /* move past filter desc */
                tx_buf++;
                tx_desc++;
                i++;
                if (unlikely(!i)) {
                        i -= tx_ring->count;
                        tx_buf = tx_ring->tx_bi;
                        tx_desc = I40E_TX_DESC(tx_ring, 0);
                }
                /* unmap skb header data */
                dma_unmap_single(tx_ring->dev,
                                 dma_unmap_addr(tx_buf, dma),
                                 dma_unmap_len(tx_buf, len),
                                 DMA_TO_DEVICE);
                if (tx_buf->tx_flags & I40E_TX_FLAGS_FD_SB)
                        kfree(tx_buf->raw_buf);

                tx_buf->raw_buf = NULL;
                tx_buf->tx_flags = 0;
                tx_buf->next_to_watch = NULL;
                dma_unmap_len_set(tx_buf, len, 0);
                tx_desc->buffer_addr = 0;
                tx_desc->cmd_type_offset_bsz = 0;

                /* move us past the eop_desc for start of next FD desc */
                tx_buf++;
                tx_desc++;
                i++;
                if (unlikely(!i)) {
                        i -= tx_ring->count;
                        tx_buf = tx_ring->tx_bi;
                        tx_desc = I40E_TX_DESC(tx_ring, 0);
                }

                /* update budget accounting */
                budget--;
        } while (likely(budget));

        i += tx_ring->count;
        tx_ring->next_to_clean = i;

        if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED)
                i40e_irq_dynamic_enable(vsi, tx_ring->q_vector->v_idx);

        return budget > 0;
}

/**
 * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
 * @irq: interrupt number
 * @data: pointer to a q_vector
 **/
static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
{
        struct i40e_q_vector *q_vector = data;
        struct i40e_vsi *vsi;

        if (!q_vector->tx.ring)
                return IRQ_HANDLED;

        vsi = q_vector->tx.ring->vsi;
        i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);

        return IRQ_HANDLED;
}

/**
 * i40e_map_vector_to_qp - Assigns the queue pair to the vector
 * @vsi: the VSI being configured
 * @v_idx: vector index
 * @qp_idx: queue pair index
 **/
static void i40e_map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
{
        struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
        struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
        struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];

        tx_ring->q_vector = q_vector;
        tx_ring->next = q_vector->tx.ring;
        q_vector->tx.ring = tx_ring;
        q_vector->tx.count++;

        /* Place XDP Tx ring in the same q_vector ring list as regular Tx */
        if (i40e_enabled_xdp_vsi(vsi)) {
                struct i40e_ring *xdp_ring = vsi->xdp_rings[qp_idx];

                xdp_ring->q_vector = q_vector;
                xdp_ring->next = q_vector->tx.ring;
                q_vector->tx.ring = xdp_ring;
                q_vector->tx.count++;
        }

        rx_ring->q_vector = q_vector;
        rx_ring->next = q_vector->rx.ring;
        q_vector->rx.ring = rx_ring;
        q_vector->rx.count++;
}

/**
 * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
 * @vsi: the VSI being configured
 *
 * This function maps descriptor rings to the queue-specific vectors
 * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 * one vector per queue pair, but on a constrained vector budget, we
 * group the queue pairs as "efficiently" as possible.
 **/
static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
{
        int qp_remaining = vsi->num_queue_pairs;
        int q_vectors = vsi->num_q_vectors;
        int num_ringpairs;
        int v_start = 0;
        int qp_idx = 0;

        /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
         * group them so there are multiple queues per vector.
         * It is also important to go through all the vectors available to be
         * sure that if we don't use all the vectors, that the remaining vectors
         * are cleared. This is especially important when decreasing the
         * number of queues in use.
         */
        for (; v_start < q_vectors; v_start++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];

                num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);

                q_vector->num_ringpairs = num_ringpairs;

                q_vector->rx.count = 0;
                q_vector->tx.count = 0;
                q_vector->rx.ring = NULL;
                q_vector->tx.ring = NULL;

                while (num_ringpairs--) {
                        i40e_map_vector_to_qp(vsi, v_start, qp_idx);
                        qp_idx++;
                        qp_remaining--;
                }
        }
}

/**
 * i40e_vsi_request_irq - Request IRQ from the OS
 * @vsi: the VSI being configured
 * @basename: name for the vector
 **/
static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
{
        struct i40e_pf *pf = vsi->back;
        int err;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                err = i40e_vsi_request_irq_msix(vsi, basename);
        else if (pf->flags & I40E_FLAG_MSI_ENABLED)
                err = request_irq(pf->pdev->irq, i40e_intr, 0,
                                  pf->int_name, pf);
        else
                err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
                                  pf->int_name, pf);

        if (err)
                dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);

        return err;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
/**
 * i40e_netpoll - A Polling 'interrupt' handler
 * @netdev: network interface device structure
 *
 * This is used by netconsole to send skbs without having to re-enable
 * interrupts.  It's not called while the normal interrupt routine is executing.
 **/
static void i40e_netpoll(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        int i;

        /* if interface is down do nothing */
        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                for (i = 0; i < vsi->num_q_vectors; i++)
                        i40e_msix_clean_rings(0, vsi->q_vectors[i]);
        } else {
                i40e_intr(pf->pdev->irq, netdev);
        }
}
#endif

#define I40E_QTX_ENA_WAIT_COUNT 50

/**
 * i40e_pf_txq_wait - Wait for a PF's Tx queue to be enabled or disabled
 * @pf: the PF being configured
 * @pf_q: the PF queue
 * @enable: enable or disable state of the queue
 *
 * This routine will wait for the given Tx queue of the PF to reach the
 * enabled or disabled state.
 * Returns -ETIMEDOUT in case of failing to reach the requested state after
 * multiple retries; else will return 0 in case of success.
 **/
static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
        int i;
        u32 tx_reg;

        for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
                tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
                if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
                        break;

                usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;

        return 0;
}

/**
 * i40e_control_tx_q - Start or stop a particular Tx queue
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @enable: start or stop the queue
 *
 * This function enables or disables a single queue. Note that any delay
 * required after the operation is expected to be handled by the caller of
 * this function.
 **/
static void i40e_control_tx_q(struct i40e_pf *pf, int pf_q, bool enable)
{
        struct i40e_hw *hw = &pf->hw;
        u32 tx_reg;
        int i;

        /* warn the TX unit of coming changes */
        i40e_pre_tx_queue_cfg(&pf->hw, pf_q, enable);
        if (!enable)
                usleep_range(10, 20);

        for (i = 0; i < I40E_QTX_ENA_WAIT_COUNT; i++) {
                tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
                if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
                    ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
                        break;
                usleep_range(1000, 2000);
        }

        /* Skip if the queue is already in the requested state */
        if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
                return;

        /* turn on/off the queue */
        if (enable) {
                wr32(hw, I40E_QTX_HEAD(pf_q), 0);
                tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
        } else {
                tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
        }

        wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
}

/**
 * i40e_control_wait_tx_q - Start/stop Tx queue and wait for completion
 * @seid: VSI SEID
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @is_xdp: true if the queue is used for XDP
 * @enable: start or stop the queue
 **/
static int i40e_control_wait_tx_q(int seid, struct i40e_pf *pf, int pf_q,
                                  bool is_xdp, bool enable)
{
        int ret;

        i40e_control_tx_q(pf, pf_q, enable);

        /* wait for the change to finish */
        ret = i40e_pf_txq_wait(pf, pf_q, enable);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VSI seid %d %sTx ring %d %sable timeout\n",
                         seid, (is_xdp ? "XDP " : ""), pf_q,
                         (enable ? "en" : "dis"));
        }

        return ret;
}

/**
 * i40e_vsi_control_tx - Start or stop a VSI's rings
 * @vsi: the VSI being configured
 * @enable: start or stop the rings
 **/
static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret = 0;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                ret = i40e_control_wait_tx_q(vsi->seid, pf,
                                             pf_q,
                                             false /*is xdp*/, enable);
                if (ret)
                        break;

                if (!i40e_enabled_xdp_vsi(vsi))
                        continue;

                ret = i40e_control_wait_tx_q(vsi->seid, pf,
                                             pf_q + vsi->alloc_queue_pairs,
                                             true /*is xdp*/, enable);
                if (ret)
                        break;
        }

        return ret;
}

/**
 * i40e_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
 * @pf: the PF being configured
 * @pf_q: the PF queue
 * @enable: enable or disable state of the queue
 *
 * This routine will wait for the given Rx queue of the PF to reach the
 * enabled or disabled state.
 * Returns -ETIMEDOUT in case of failing to reach the requested state after
 * multiple retries; else will return 0 in case of success.
 **/
static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
{
        int i;
        u32 rx_reg;

        for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
                rx_reg = rd32(&pf->hw, I40E_QRX_ENA(pf_q));
                if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
                        break;

                usleep_range(10, 20);
        }
        if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
                return -ETIMEDOUT;

        return 0;
}

/**
 * i40e_control_rx_q - Start or stop a particular Rx queue
 * @pf: the PF structure
 * @pf_q: the PF queue to configure
 * @enable: start or stop the queue
 *
 * This function enables or disables a single queue. Note that any delay
 * required after the operation is expected to be handled by the caller of
 * this function.
 **/
static void i40e_control_rx_q(struct i40e_pf *pf, int pf_q, bool enable)
{
        struct i40e_hw *hw = &pf->hw;
        u32 rx_reg;
        int i;

        for (i = 0; i < I40E_QTX_ENA_WAIT_COUNT; i++) {
                rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
                if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
                    ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
                        break;
                usleep_range(1000, 2000);
        }

        /* Skip if the queue is already in the requested state */
        if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
                return;

        /* turn on/off the queue */
        if (enable)
                rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
        else
                rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;

        wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
}

/**
 * i40e_vsi_control_rx - Start or stop a VSI's rings
 * @vsi: the VSI being configured
 * @enable: start or stop the rings
 **/
static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret = 0;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                i40e_control_rx_q(pf, pf_q, enable);

                /* wait for the change to finish */
                ret = i40e_pf_rxq_wait(pf, pf_q, enable);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Rx ring %d %sable timeout\n",
                                 vsi->seid, pf_q, (enable ? "en" : "dis"));
                        break;
                }
        }

        /* Due to HW errata, on Rx disable only, the register can indicate done
         * before it really is. Needs 50ms to be sure
         */
        if (!enable)
                mdelay(50);

        return ret;
}

/**
 * i40e_vsi_start_rings - Start a VSI's rings
 * @vsi: the VSI being configured
 **/
int i40e_vsi_start_rings(struct i40e_vsi *vsi)
{
        int ret = 0;

        /* do rx first for enable and last for disable */
        ret = i40e_vsi_control_rx(vsi, true);
        if (ret)
                return ret;
        ret = i40e_vsi_control_tx(vsi, true);

        return ret;
}

/**
 * i40e_vsi_stop_rings - Stop a VSI's rings
 * @vsi: the VSI being configured
 **/
void i40e_vsi_stop_rings(struct i40e_vsi *vsi)
{
        /* When port TX is suspended, don't wait */
        if (test_bit(__I40E_PORT_SUSPENDED, vsi->back->state))
                return i40e_vsi_stop_rings_no_wait(vsi);

        /* do rx first for enable and last for disable
         * Ignore return value, we need to shutdown whatever we can
         */
        i40e_vsi_control_tx(vsi, false);
        i40e_vsi_control_rx(vsi, false);
}

/**
 * i40e_vsi_stop_rings_no_wait - Stop a VSI's rings and do not delay
 * @vsi: the VSI being shutdown
 *
 * This function stops all the rings for a VSI but does not delay to verify
 * that rings have been disabled. It is expected that the caller is shutting
 * down multiple VSIs at once and will delay together for all the VSIs after
 * initiating the shutdown. This is particularly useful for shutting down lots
 * of VFs together. Otherwise, a large delay can be incurred while configuring
 * each VSI in serial.
 **/
void i40e_vsi_stop_rings_no_wait(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                i40e_control_tx_q(pf, pf_q, false);
                i40e_control_rx_q(pf, pf_q, false);
        }
}

/**
 * i40e_vsi_free_irq - Free the irq association with the OS
 * @vsi: the VSI being configured
 **/
static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int base = vsi->base_vector;
        u32 val, qp;
        int i;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                if (!vsi->q_vectors)
                        return;

                if (!vsi->irqs_ready)
                        return;

                vsi->irqs_ready = false;
                for (i = 0; i < vsi->num_q_vectors; i++) {
                        int irq_num;
                        u16 vector;

                        vector = i + base;
                        irq_num = pf->msix_entries[vector].vector;

                        /* free only the irqs that were actually requested */
                        if (!vsi->q_vectors[i] ||
                            !vsi->q_vectors[i]->num_ringpairs)
                                continue;

                        /* clear the affinity notifier in the IRQ descriptor */
                        irq_set_affinity_notifier(irq_num, NULL);
                        /* remove our suggested affinity mask for this IRQ */
                        irq_set_affinity_hint(irq_num, NULL);
                        synchronize_irq(irq_num);
                        free_irq(irq_num, vsi->q_vectors[i]);

                        /* Tear down the interrupt queue link list
                         *
                         * We know that they come in pairs and always
                         * the Rx first, then the Tx.  To clear the
                         * link list, stick the EOL value into the
                         * next_q field of the registers.
                         */
                        val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
                        qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
                                >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
                        val |= I40E_QUEUE_END_OF_LIST
                                << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
                        wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);

                        while (qp != I40E_QUEUE_END_OF_LIST) {
                                u32 next;

                                val = rd32(hw, I40E_QINT_RQCTL(qp));

                                val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
                                         I40E_QINT_RQCTL_MSIX0_INDX_MASK |
                                         I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
                                         I40E_QINT_RQCTL_INTEVENT_MASK);

                                val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
                                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);

                                wr32(hw, I40E_QINT_RQCTL(qp), val);

                                val = rd32(hw, I40E_QINT_TQCTL(qp));

                                next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
                                        >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;

                                val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
                                         I40E_QINT_TQCTL_MSIX0_INDX_MASK |
                                         I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
                                         I40E_QINT_TQCTL_INTEVENT_MASK);

                                val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
                                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);

                                wr32(hw, I40E_QINT_TQCTL(qp), val);
                                qp = next;
                        }
                }
        } else {
                free_irq(pf->pdev->irq, pf);

                val = rd32(hw, I40E_PFINT_LNKLST0);
                qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
                        >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
                val |= I40E_QUEUE_END_OF_LIST
                        << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
                wr32(hw, I40E_PFINT_LNKLST0, val);

                val = rd32(hw, I40E_QINT_RQCTL(qp));
                val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
                         I40E_QINT_RQCTL_MSIX0_INDX_MASK |
                         I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
                         I40E_QINT_RQCTL_INTEVENT_MASK);

                val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
                        I40E_QINT_RQCTL_NEXTQ_INDX_MASK);

                wr32(hw, I40E_QINT_RQCTL(qp), val);

                val = rd32(hw, I40E_QINT_TQCTL(qp));

                val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
                         I40E_QINT_TQCTL_MSIX0_INDX_MASK |
                         I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
                         I40E_QINT_TQCTL_INTEVENT_MASK);

                val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
                        I40E_QINT_TQCTL_NEXTQ_INDX_MASK);

                wr32(hw, I40E_QINT_TQCTL(qp), val);
        }
}

/**
 * i40e_free_q_vector - Free memory allocated for specific interrupt vector
 * @vsi: the VSI being configured
 * @v_idx: Index of vector to be freed
 *
 * This function frees the memory allocated to the q_vector.  In addition if
 * NAPI is enabled it will delete any references to the NAPI struct prior
 * to freeing the q_vector.
 **/
static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
{
        struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
        struct i40e_ring *ring;

        if (!q_vector)
                return;

        /* disassociate q_vector from rings */
        i40e_for_each_ring(ring, q_vector->tx)
                ring->q_vector = NULL;

        i40e_for_each_ring(ring, q_vector->rx)
                ring->q_vector = NULL;

        /* only VSI w/ an associated netdev is set up w/ NAPI */
        if (vsi->netdev)
                netif_napi_del(&q_vector->napi);

        vsi->q_vectors[v_idx] = NULL;

        kfree_rcu(q_vector, rcu);
}

/**
 * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
 * @vsi: the VSI being un-configured
 *
 * This frees the memory allocated to the q_vectors and
 * deletes references to the NAPI struct.
 **/
static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
{
        int v_idx;

        for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
                i40e_free_q_vector(vsi, v_idx);
}

/**
 * i40e_reset_interrupt_capability - Disable interrupt setup in OS
 * @pf: board private structure
 **/
static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
{
        /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                pci_disable_msix(pf->pdev);
                kfree(pf->msix_entries);
                pf->msix_entries = NULL;
                kfree(pf->irq_pile);
                pf->irq_pile = NULL;
        } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
                pci_disable_msi(pf->pdev);
        }
        pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
}

/**
 * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
 * @pf: board private structure
 *
 * We go through and clear interrupt specific resources and reset the structure
 * to pre-load conditions
 **/
static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
{
        int i;

        i40e_stop_misc_vector(pf);
        if (pf->flags & I40E_FLAG_MSIX_ENABLED && pf->msix_entries) {
                synchronize_irq(pf->msix_entries[0].vector);
                free_irq(pf->msix_entries[0].vector, pf);
        }

        i40e_put_lump(pf->irq_pile, pf->iwarp_base_vector,
                      I40E_IWARP_IRQ_PILE_ID);

        i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
        for (i = 0; i < pf->num_alloc_vsi; i++)
                if (pf->vsi[i])
                        i40e_vsi_free_q_vectors(pf->vsi[i]);
        i40e_reset_interrupt_capability(pf);
}

/**
 * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
 * @vsi: the VSI being configured
 **/
static void i40e_napi_enable_all(struct i40e_vsi *vsi)
{
        int q_idx;

        if (!vsi->netdev)
                return;

        for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[q_idx];

                if (q_vector->rx.ring || q_vector->tx.ring)
                        napi_enable(&q_vector->napi);
        }
}

/**
 * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
 * @vsi: the VSI being configured
 **/
static void i40e_napi_disable_all(struct i40e_vsi *vsi)
{
        int q_idx;

        if (!vsi->netdev)
                return;

        for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++) {
                struct i40e_q_vector *q_vector = vsi->q_vectors[q_idx];

                if (q_vector->rx.ring || q_vector->tx.ring)
                        napi_disable(&q_vector->napi);
        }
}

/**
 * i40e_vsi_close - Shut down a VSI
 * @vsi: the vsi to be quelled
 **/
static void i40e_vsi_close(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        if (!test_and_set_bit(__I40E_VSI_DOWN, vsi->state))
                i40e_down(vsi);
        i40e_vsi_free_irq(vsi);
        i40e_vsi_free_tx_resources(vsi);
        i40e_vsi_free_rx_resources(vsi);
        vsi->current_netdev_flags = 0;
        pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                pf->flags |=  I40E_FLAG_CLIENT_RESET;
}

/**
 * i40e_quiesce_vsi - Pause a given VSI
 * @vsi: the VSI being paused
 **/
static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
{
        if (test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        set_bit(__I40E_VSI_NEEDS_RESTART, vsi->state);
        if (vsi->netdev && netif_running(vsi->netdev))
                vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
        else
                i40e_vsi_close(vsi);
}

/**
 * i40e_unquiesce_vsi - Resume a given VSI
 * @vsi: the VSI being resumed
 **/
static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
{
        if (!test_and_clear_bit(__I40E_VSI_NEEDS_RESTART, vsi->state))
                return;

        if (vsi->netdev && netif_running(vsi->netdev))
                vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
        else
                i40e_vsi_open(vsi);   /* this clears the DOWN bit */
}

/**
 * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
 * @pf: the PF
 **/
static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
{
        int v;

        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (pf->vsi[v])
                        i40e_quiesce_vsi(pf->vsi[v]);
        }
}

/**
 * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
 * @pf: the PF
 **/
static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
{
        int v;

        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (pf->vsi[v])
                        i40e_unquiesce_vsi(pf->vsi[v]);
        }
}

/**
 * i40e_vsi_wait_queues_disabled - Wait for VSI's queues to be disabled
 * @vsi: the VSI being configured
 *
 * Wait until all queues on a given VSI have been disabled.
 **/
int i40e_vsi_wait_queues_disabled(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int i, pf_q, ret;

        pf_q = vsi->base_queue;
        for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
                /* Check and wait for the Tx queue */
                ret = i40e_pf_txq_wait(pf, pf_q, false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Tx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }

                if (!i40e_enabled_xdp_vsi(vsi))
                        goto wait_rx;

                /* Check and wait for the XDP Tx queue */
                ret = i40e_pf_txq_wait(pf, pf_q + vsi->alloc_queue_pairs,
                                       false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d XDP Tx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }
wait_rx:
                /* Check and wait for the Rx queue */
                ret = i40e_pf_rxq_wait(pf, pf_q, false);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "VSI seid %d Rx ring %d disable timeout\n",
                                 vsi->seid, pf_q);
                        return ret;
                }
        }

        return 0;
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_pf_wait_queues_disabled - Wait for all queues of PF VSIs to be disabled
 * @pf: the PF
 *
 * This function waits for the queues to be in disabled state for all the
 * VSIs that are managed by this PF.
 **/
static int i40e_pf_wait_queues_disabled(struct i40e_pf *pf)
{
        int v, ret = 0;

        for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
                if (pf->vsi[v]) {
                        ret = i40e_vsi_wait_queues_disabled(pf->vsi[v]);
                        if (ret)
                                break;
                }
        }

        return ret;
}

#endif

/**
 * i40e_detect_recover_hung_queue - Function to detect and recover hung_queue
 * @q_idx: TX queue number
 * @vsi: Pointer to VSI struct
 *
 * This function checks specified queue for given VSI. Detects hung condition.
 * We proactively detect hung TX queues by checking if interrupts are disabled
 * but there are pending descriptors.  If it appears hung, attempt to recover
 * by triggering a SW interrupt.
 **/
static void i40e_detect_recover_hung_queue(int q_idx, struct i40e_vsi *vsi)
{
        struct i40e_ring *tx_ring = NULL;
        struct i40e_pf  *pf;
        u32 val, tx_pending;
        int i;

        pf = vsi->back;

        /* now that we have an index, find the tx_ring struct */
        for (i = 0; i < vsi->num_queue_pairs; i++) {
                if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
                        if (q_idx == vsi->tx_rings[i]->queue_index) {
                                tx_ring = vsi->tx_rings[i];
                                break;
                        }
                }
        }

        if (!tx_ring)
                return;

        /* Read interrupt register */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                val = rd32(&pf->hw,
                           I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
                                               tx_ring->vsi->base_vector - 1));
        else
                val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);

        tx_pending = i40e_get_tx_pending(tx_ring);

        /* Interrupts are disabled and TX pending is non-zero,
         * trigger the SW interrupt (don't wait). Worst case
         * there will be one extra interrupt which may result
         * into not cleaning any queues because queues are cleaned.
         */
        if (tx_pending && (!(val & I40E_PFINT_DYN_CTLN_INTENA_MASK)))
                i40e_force_wb(vsi, tx_ring->q_vector);
}

/**
 * i40e_detect_recover_hung - Function to detect and recover hung_queues
 * @pf:  pointer to PF struct
 *
 * LAN VSI has netdev and netdev has TX queues. This function is to check
 * each of those TX queues if they are hung, trigger recovery by issuing
 * SW interrupt.
 **/
static void i40e_detect_recover_hung(struct i40e_pf *pf)
{
        struct net_device *netdev;
        struct i40e_vsi *vsi;
        unsigned int i;

        /* Only for LAN VSI */
        vsi = pf->vsi[pf->lan_vsi];

        if (!vsi)
                return;

        /* Make sure, VSI state is not DOWN/RECOVERY_PENDING */
        if (test_bit(__I40E_VSI_DOWN, vsi->back->state) ||
            test_bit(__I40E_RESET_RECOVERY_PENDING, vsi->back->state))
                return;

        /* Make sure type is MAIN VSI */
        if (vsi->type != I40E_VSI_MAIN)
                return;

        netdev = vsi->netdev;
        if (!netdev)
                return;

        /* Bail out if netif_carrier is not OK */
        if (!netif_carrier_ok(netdev))
                return;

        /* Go thru' TX queues for netdev */
        for (i = 0; i < netdev->num_tx_queues; i++) {
                struct netdev_queue *q;

                q = netdev_get_tx_queue(netdev, i);
                if (q)
                        i40e_detect_recover_hung_queue(i, vsi);
        }
}

/**
 * i40e_get_iscsi_tc_map - Return TC map for iSCSI APP
 * @pf: pointer to PF
 *
 * Get TC map for ISCSI PF type that will include iSCSI TC
 * and LAN TC.
 **/
static u8 i40e_get_iscsi_tc_map(struct i40e_pf *pf)
{
        struct i40e_dcb_app_priority_table app;
        struct i40e_hw *hw = &pf->hw;
        u8 enabled_tc = 1; /* TC0 is always enabled */
        u8 tc, i;
        /* Get the iSCSI APP TLV */
        struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;

        for (i = 0; i < dcbcfg->numapps; i++) {
                app = dcbcfg->app[i];
                if (app.selector == I40E_APP_SEL_TCPIP &&
                    app.protocolid == I40E_APP_PROTOID_ISCSI) {
                        tc = dcbcfg->etscfg.prioritytable[app.priority];
                        enabled_tc |= BIT(tc);
                        break;
                }
        }

        return enabled_tc;
}

/**
 * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
 * @dcbcfg: the corresponding DCBx configuration structure
 *
 * Return the number of TCs from given DCBx configuration
 **/
static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
{
        int i, tc_unused = 0;
        u8 num_tc = 0;
        u8 ret = 0;

        /* Scan the ETS Config Priority Table to find
         * traffic class enabled for a given priority
         * and create a bitmask of enabled TCs
         */
        for (i = 0; i < I40E_MAX_USER_PRIORITY; i++)
                num_tc |= BIT(dcbcfg->etscfg.prioritytable[i]);

        /* Now scan the bitmask to check for
         * contiguous TCs starting with TC0
         */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (num_tc & BIT(i)) {
                        if (!tc_unused) {
                                ret++;
                        } else {
                                pr_err("Non-contiguous TC - Disabling DCB\n");
                                return 1;
                        }
                } else {
                        tc_unused = 1;
                }
        }

        /* There is always at least TC0 */
        if (!ret)
                ret = 1;

        return ret;
}

/**
 * i40e_dcb_get_enabled_tc - Get enabled traffic classes
 * @dcbcfg: the corresponding DCBx configuration structure
 *
 * Query the current DCB configuration and return the number of
 * traffic classes enabled from the given DCBX config
 **/
static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
{
        u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
        u8 enabled_tc = 1;
        u8 i;

        for (i = 0; i < num_tc; i++)
                enabled_tc |= BIT(i);

        return enabled_tc;
}

/**
 * i40e_pf_get_num_tc - Get enabled traffic classes for PF
 * @pf: PF being queried
 *
 * Return number of traffic classes enabled for the given PF
 **/
static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        u8 i, enabled_tc = 1;
        u8 num_tc = 0;
        struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;

        /* If DCB is not enabled then always in single TC */
        if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
                return 1;

        /* SFP mode will be enabled for all TCs on port */
        if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
                return i40e_dcb_get_num_tc(dcbcfg);

        /* MFP mode return count of enabled TCs for this PF */
        if (pf->hw.func_caps.iscsi)
                enabled_tc =  i40e_get_iscsi_tc_map(pf);
        else
                return 1; /* Only TC0 */

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        num_tc++;
        }
        return num_tc;
}

/**
 * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
 * @pf: PF being queried
 *
 * Return a bitmap for enabled traffic classes for this PF.
 **/
static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
{
        /* If DCB is not enabled for this PF then just return default TC */
        if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
                return I40E_DEFAULT_TRAFFIC_CLASS;

        /* SFP mode we want PF to be enabled for all TCs */
        if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
                return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);

        /* MFP enabled and iSCSI PF type */
        if (pf->hw.func_caps.iscsi)
                return i40e_get_iscsi_tc_map(pf);
        else
                return I40E_DEFAULT_TRAFFIC_CLASS;
}

/**
 * i40e_vsi_get_bw_info - Query VSI BW Information
 * @vsi: the VSI being queried
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
{
        struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
        struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret;
        u32 tc_bw_max;
        int i;

        /* Get the VSI level BW configuration */
        ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi bw config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        /* Get the VSI level BW configuration per TC */
        ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
                                               NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi ets bw config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EINVAL;
        }

        if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
                dev_info(&pf->pdev->dev,
                         "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
                         bw_config.tc_valid_bits,
                         bw_ets_config.tc_valid_bits);
                /* Still continuing */
        }

        vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
        vsi->bw_max_quanta = bw_config.max_bw;
        tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
                    (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
                vsi->bw_ets_limit_credits[i] =
                                        le16_to_cpu(bw_ets_config.credits[i]);
                /* 3 bits out of 4 for each TC */
                vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
        }

        return 0;
}

/**
 * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
 * @vsi: the VSI being configured
 * @enabled_tc: TC bitmap
 * @bw_credits: BW shared credits per TC
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
                                       u8 *bw_share)
{
        struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
        i40e_status ret;
        int i;

        bw_data.tc_valid_bits = enabled_tc;
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                bw_data.tc_bw_credits[i] = bw_share[i];

        ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
                                       NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "AQ command Config VSI BW allocation per TC failed = %d\n",
                         vsi->back->hw.aq.asq_last_status);
                return -EINVAL;
        }

        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
                vsi->info.qs_handle[i] = bw_data.qs_handles[i];

        return 0;
}

/**
 * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
 * @vsi: the VSI being configured
 * @enabled_tc: TC map to be enabled
 *
 **/
static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
{
        struct net_device *netdev = vsi->netdev;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u8 netdev_tc = 0;
        int i;
        struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;

        if (!netdev)
                return;

        if (!enabled_tc) {
                netdev_reset_tc(netdev);
                return;
        }

        /* Set up actual enabled TCs on the VSI */
        if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
                return;

        /* set per TC queues for the VSI */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                /* Only set TC queues for enabled tcs
                 *
                 * e.g. For a VSI that has TC0 and TC3 enabled the
                 * enabled_tc bitmap would be 0x00001001; the driver
                 * will set the numtc for netdev as 2 that will be
                 * referenced by the netdev layer as TC 0 and 1.
                 */
                if (vsi->tc_config.enabled_tc & BIT(i))
                        netdev_set_tc_queue(netdev,
                                        vsi->tc_config.tc_info[i].netdev_tc,
                                        vsi->tc_config.tc_info[i].qcount,
                                        vsi->tc_config.tc_info[i].qoffset);
        }

        /* Assign UP2TC map for the VSI */
        for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
                /* Get the actual TC# for the UP */
                u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
                /* Get the mapped netdev TC# for the UP */
                netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
                netdev_set_prio_tc_map(netdev, i, netdev_tc);
        }
}

/**
 * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
 * @vsi: the VSI being configured
 * @ctxt: the ctxt buffer returned from AQ VSI update param command
 **/
static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
                                      struct i40e_vsi_context *ctxt)
{
        /* copy just the sections touched not the entire info
         * since not all sections are valid as returned by
         * update vsi params
         */
        vsi->info.mapping_flags = ctxt->info.mapping_flags;
        memcpy(&vsi->info.queue_mapping,
               &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
        memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
               sizeof(vsi->info.tc_mapping));
}

/**
 * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
 * @vsi: VSI to be configured
 * @enabled_tc: TC bitmap
 *
 * This configures a particular VSI for TCs that are mapped to the
 * given TC bitmap. It uses default bandwidth share for TCs across
 * VSIs to configure TC for a particular VSI.
 *
 * NOTE:
 * It is expected that the VSI queues have been quisced before calling
 * this function.
 **/
static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
{
        u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
        struct i40e_vsi_context ctxt;
        int ret = 0;
        int i;

        /* Check if enabled_tc is same as existing or new TCs */
        if (vsi->tc_config.enabled_tc == enabled_tc)
                return ret;

        /* Enable ETS TCs with equal BW Share for now across all VSIs */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        bw_share[i] = 1;
        }

        ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed configuring TC map %d for VSI %d\n",
                         enabled_tc, vsi->seid);
                goto out;
        }

        /* Update Queue Pairs Mapping for currently enabled UPs */
        ctxt.seid = vsi->seid;
        ctxt.pf_num = vsi->back->hw.pf_id;
        ctxt.vf_num = 0;
        ctxt.uplink_seid = vsi->uplink_seid;
        ctxt.info = vsi->info;
        i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);

        if (vsi->back->flags & I40E_FLAG_IWARP_ENABLED) {
                ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
                ctxt.info.queueing_opt_flags |= I40E_AQ_VSI_QUE_OPT_TCP_ENA;
        }

        /* Update the VSI after updating the VSI queue-mapping information */
        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Update vsi tc config failed, err %s aq_err %s\n",
                         i40e_stat_str(&vsi->back->hw, ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
                goto out;
        }
        /* update the local VSI info with updated queue map */
        i40e_vsi_update_queue_map(vsi, &ctxt);
        vsi->info.valid_sections = 0;

        /* Update current VSI BW information */
        ret = i40e_vsi_get_bw_info(vsi);
        if (ret) {
                dev_info(&vsi->back->pdev->dev,
                         "Failed updating vsi bw info, err %s aq_err %s\n",
                         i40e_stat_str(&vsi->back->hw, ret),
                         i40e_aq_str(&vsi->back->hw,
                                     vsi->back->hw.aq.asq_last_status));
                goto out;
        }

        /* Update the netdev TC setup */
        i40e_vsi_config_netdev_tc(vsi, enabled_tc);
out:
        return ret;
}

/**
 * i40e_veb_config_tc - Configure TCs for given VEB
 * @veb: given VEB
 * @enabled_tc: TC bitmap
 *
 * Configures given TC bitmap for VEB (switching) element
 **/
int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
{
        struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
        struct i40e_pf *pf = veb->pf;
        int ret = 0;
        int i;

        /* No TCs or already enabled TCs just return */
        if (!enabled_tc || veb->enabled_tc == enabled_tc)
                return ret;

        bw_data.tc_valid_bits = enabled_tc;
        /* bw_data.absolute_credits is not set (relative) */

        /* Enable ETS TCs with equal BW Share for now */
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                if (enabled_tc & BIT(i))
                        bw_data.tc_bw_share_credits[i] = 1;
        }

        ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
                                                   &bw_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "VEB bw config failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto out;
        }

        /* Update the BW information */
        ret = i40e_veb_get_bw_info(veb);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed getting veb bw config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }

out:
        return ret;
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
 * @pf: PF struct
 *
 * Reconfigure VEB/VSIs on a given PF; it is assumed that
 * the caller would've quiesce all the VSIs before calling
 * this function
 **/
static void i40e_dcb_reconfigure(struct i40e_pf *pf)
{
        u8 tc_map = 0;
        int ret;
        u8 v;

        /* Enable the TCs available on PF to all VEBs */
        tc_map = i40e_pf_get_tc_map(pf);
        for (v = 0; v < I40E_MAX_VEB; v++) {
                if (!pf->veb[v])
                        continue;
                ret = i40e_veb_config_tc(pf->veb[v], tc_map);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Failed configuring TC for VEB seid=%d\n",
                                 pf->veb[v]->seid);
                        /* Will try to configure as many components */
                }
        }

        /* Update each VSI */
        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (!pf->vsi[v])
                        continue;

                /* - Enable all TCs for the LAN VSI
                 * - For all others keep them at TC0 for now
                 */
                if (v == pf->lan_vsi)
                        tc_map = i40e_pf_get_tc_map(pf);
                else
                        tc_map = I40E_DEFAULT_TRAFFIC_CLASS;

                ret = i40e_vsi_config_tc(pf->vsi[v], tc_map);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Failed configuring TC for VSI seid=%d\n",
                                 pf->vsi[v]->seid);
                        /* Will try to configure as many components */
                } else {
                        /* Re-configure VSI vectors based on updated TC map */
                        i40e_vsi_map_rings_to_vectors(pf->vsi[v]);
                        if (pf->vsi[v]->netdev)
                                i40e_dcbnl_set_all(pf->vsi[v]);
                }
        }
}

/**
 * i40e_resume_port_tx - Resume port Tx
 * @pf: PF struct
 *
 * Resume a port's Tx and issue a PF reset in case of failure to
 * resume.
 **/
static int i40e_resume_port_tx(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int ret;

        ret = i40e_aq_resume_port_tx(hw, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Resume Port Tx failed, err %s aq_err %s\n",
                          i40e_stat_str(&pf->hw, ret),
                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                /* Schedule PF reset to recover */
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                i40e_service_event_schedule(pf);
        }

        return ret;
}

/**
 * i40e_init_pf_dcb - Initialize DCB configuration
 * @pf: PF being configured
 *
 * Query the current DCB configuration and cache it
 * in the hardware structure
 **/
static int i40e_init_pf_dcb(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int err = 0;

        /* Do not enable DCB for SW1 and SW2 images even if the FW is capable */
        if (pf->hw_features & I40E_HW_NO_DCB_SUPPORT)
                goto out;

        /* Get the initial DCB configuration */
        err = i40e_init_dcb(hw);
        if (!err) {
                /* Device/Function is not DCBX capable */
                if ((!hw->func_caps.dcb) ||
                    (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
                        dev_info(&pf->pdev->dev,
                                 "DCBX offload is not supported or is disabled for this PF.\n");
                } else {
                        /* When status is not DISABLED then DCBX in FW */
                        pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
                                       DCB_CAP_DCBX_VER_IEEE;

                        pf->flags |= I40E_FLAG_DCB_CAPABLE;
                        /* Enable DCB tagging only when more than one TC
                         * or explicitly disable if only one TC
                         */
                        if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
                                pf->flags |= I40E_FLAG_DCB_ENABLED;
                        else
                                pf->flags &= ~I40E_FLAG_DCB_ENABLED;
                        dev_dbg(&pf->pdev->dev,
                                "DCBX offload is supported for this PF.\n");
                }
        } else {
                dev_info(&pf->pdev->dev,
                         "Query for DCB configuration failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, err),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }

out:
        return err;
}
#endif /* CONFIG_I40E_DCB */
#define SPEED_SIZE 14
#define FC_SIZE 8
/**
 * i40e_print_link_message - print link up or down
 * @vsi: the VSI for which link needs a message
 */
void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
{
        enum i40e_aq_link_speed new_speed;
        char *speed = "Unknown";
        char *fc = "Unknown";
        char *fec = "";
        char *req_fec = "";
        char *an = "";

        new_speed = vsi->back->hw.phy.link_info.link_speed;

        if ((vsi->current_isup == isup) && (vsi->current_speed == new_speed))
                return;
        vsi->current_isup = isup;
        vsi->current_speed = new_speed;
        if (!isup) {
                netdev_info(vsi->netdev, "NIC Link is Down\n");
                return;
        }

        /* Warn user if link speed on NPAR enabled partition is not at
         * least 10GB
         */
        if (vsi->back->hw.func_caps.npar_enable &&
            (vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_1GB ||
             vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_100MB))
                netdev_warn(vsi->netdev,
                            "The partition detected link speed that is less than 10Gbps\n");

        switch (vsi->back->hw.phy.link_info.link_speed) {
        case I40E_LINK_SPEED_40GB:
                speed = "40 G";
                break;
        case I40E_LINK_SPEED_20GB:
                speed = "20 G";
                break;
        case I40E_LINK_SPEED_25GB:
                speed = "25 G";
                break;
        case I40E_LINK_SPEED_10GB:
                speed = "10 G";
                break;
        case I40E_LINK_SPEED_1GB:
                speed = "1000 M";
                break;
        case I40E_LINK_SPEED_100MB:
                speed = "100 M";
                break;
        default:
                break;
        }

        switch (vsi->back->hw.fc.current_mode) {
        case I40E_FC_FULL:
                fc = "RX/TX";
                break;
        case I40E_FC_TX_PAUSE:
                fc = "TX";
                break;
        case I40E_FC_RX_PAUSE:
                fc = "RX";
                break;
        default:
                fc = "None";
                break;
        }

        if (vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_25GB) {
                req_fec = ", Requested FEC: None";
                fec = ", FEC: None";
                an = ", Autoneg: False";

                if (vsi->back->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED)
                        an = ", Autoneg: True";

                if (vsi->back->hw.phy.link_info.fec_info &
                    I40E_AQ_CONFIG_FEC_KR_ENA)
                        fec = ", FEC: CL74 FC-FEC/BASE-R";
                else if (vsi->back->hw.phy.link_info.fec_info &
                         I40E_AQ_CONFIG_FEC_RS_ENA)
                        fec = ", FEC: CL108 RS-FEC";

                /* 'CL108 RS-FEC' should be displayed when RS is requested, or
                 * both RS and FC are requested
                 */
                if (vsi->back->hw.phy.link_info.req_fec_info &
                    (I40E_AQ_REQUEST_FEC_KR | I40E_AQ_REQUEST_FEC_RS)) {
                        if (vsi->back->hw.phy.link_info.req_fec_info &
                            I40E_AQ_REQUEST_FEC_RS)
                                req_fec = ", Requested FEC: CL108 RS-FEC";
                        else
                                req_fec = ", Requested FEC: CL74 FC-FEC/BASE-R";
                }
        }

        netdev_info(vsi->netdev, "NIC Link is Up, %sbps Full Duplex%s%s%s, Flow Control: %s\n",
                    speed, req_fec, fec, an, fc);
}

/**
 * i40e_up_complete - Finish the last steps of bringing up a connection
 * @vsi: the VSI being configured
 **/
static int i40e_up_complete(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int err;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                i40e_vsi_configure_msix(vsi);
        else
                i40e_configure_msi_and_legacy(vsi);

        /* start rings */
        err = i40e_vsi_start_rings(vsi);
        if (err)
                return err;

        clear_bit(__I40E_VSI_DOWN, vsi->state);
        i40e_napi_enable_all(vsi);
        i40e_vsi_enable_irq(vsi);

        if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
            (vsi->netdev)) {
                i40e_print_link_message(vsi, true);
                netif_tx_start_all_queues(vsi->netdev);
                netif_carrier_on(vsi->netdev);
        } else if (vsi->netdev) {
                i40e_print_link_message(vsi, false);
                /* need to check for qualified module here*/
                if ((pf->hw.phy.link_info.link_info &
                        I40E_AQ_MEDIA_AVAILABLE) &&
                    (!(pf->hw.phy.link_info.an_info &
                        I40E_AQ_QUALIFIED_MODULE)))
                        netdev_err(vsi->netdev,
                                   "the driver failed to link because an unqualified module was detected.");
        }

        /* replay FDIR SB filters */
        if (vsi->type == I40E_VSI_FDIR) {
                /* reset fd counters */
                pf->fd_add_err = 0;
                pf->fd_atr_cnt = 0;
                i40e_fdir_filter_restore(vsi);
        }

        /* On the next run of the service_task, notify any clients of the new
         * opened netdev
         */
        pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
        i40e_service_event_schedule(pf);

        return 0;
}

/**
 * i40e_vsi_reinit_locked - Reset the VSI
 * @vsi: the VSI being configured
 *
 * Rebuild the ring structs after some configuration
 * has changed, e.g. MTU size.
 **/
static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        WARN_ON(in_interrupt());
        while (test_and_set_bit(__I40E_CONFIG_BUSY, pf->state))
                usleep_range(1000, 2000);
        i40e_down(vsi);

        i40e_up(vsi);
        clear_bit(__I40E_CONFIG_BUSY, pf->state);
}

/**
 * i40e_up - Bring the connection back up after being down
 * @vsi: the VSI being configured
 **/
int i40e_up(struct i40e_vsi *vsi)
{
        int err;

        err = i40e_vsi_configure(vsi);
        if (!err)
                err = i40e_up_complete(vsi);

        return err;
}

/**
 * i40e_down - Shutdown the connection processing
 * @vsi: the VSI being stopped
 **/
void i40e_down(struct i40e_vsi *vsi)
{
        int i;

        /* It is assumed that the caller of this function
         * sets the vsi->state __I40E_VSI_DOWN bit.
         */
        if (vsi->netdev) {
                netif_carrier_off(vsi->netdev);
                netif_tx_disable(vsi->netdev);
        }
        i40e_vsi_disable_irq(vsi);
        i40e_vsi_stop_rings(vsi);
        i40e_napi_disable_all(vsi);

        for (i = 0; i < vsi->num_queue_pairs; i++) {
                i40e_clean_tx_ring(vsi->tx_rings[i]);
                if (i40e_enabled_xdp_vsi(vsi))
                        i40e_clean_tx_ring(vsi->xdp_rings[i]);
                i40e_clean_rx_ring(vsi->rx_rings[i]);
        }

}

/**
 * i40e_setup_tc - configure multiple traffic classes
 * @netdev: net device to configure
 * @tc: number of traffic classes to enable
 **/
static int i40e_setup_tc(struct net_device *netdev, u8 tc)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        u8 enabled_tc = 0;
        int ret = -EINVAL;
        int i;

        /* Check if DCB enabled to continue */
        if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
                netdev_info(netdev, "DCB is not enabled for adapter\n");
                goto exit;
        }

        /* Check if MFP enabled */
        if (pf->flags & I40E_FLAG_MFP_ENABLED) {
                netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
                goto exit;
        }

        /* Check whether tc count is within enabled limit */
        if (tc > i40e_pf_get_num_tc(pf)) {
                netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
                goto exit;
        }

        /* Generate TC map for number of tc requested */
        for (i = 0; i < tc; i++)
                enabled_tc |= BIT(i);

        /* Requesting same TC configuration as already enabled */
        if (enabled_tc == vsi->tc_config.enabled_tc)
                return 0;

        /* Quiesce VSI queues */
        i40e_quiesce_vsi(vsi);

        /* Configure VSI for enabled TCs */
        ret = i40e_vsi_config_tc(vsi, enabled_tc);
        if (ret) {
                netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
                            vsi->seid);
                goto exit;
        }

        /* Unquiesce VSI */
        i40e_unquiesce_vsi(vsi);

exit:
        return ret;
}

static int __i40e_setup_tc(struct net_device *netdev, enum tc_setup_type type,
                           void *type_data)
{
        struct tc_mqprio_qopt *mqprio = type_data;

        if (type != TC_SETUP_MQPRIO)
                return -EOPNOTSUPP;

        mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;

        return i40e_setup_tc(netdev, mqprio->num_tc);
}

/**
 * i40e_open - Called when a network interface is made active
 * @netdev: network interface device structure
 *
 * The open entry point is called when a network interface is made
 * active by the system (IFF_UP).  At this point all resources needed
 * for transmit and receive operations are allocated, the interrupt
 * handler is registered with the OS, the netdev watchdog subtask is
 * enabled, and the stack is notified that the interface is ready.
 *
 * Returns 0 on success, negative value on failure
 **/
int i40e_open(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        int err;

        /* disallow open during test or if eeprom is broken */
        if (test_bit(__I40E_TESTING, pf->state) ||
            test_bit(__I40E_BAD_EEPROM, pf->state))
                return -EBUSY;

        netif_carrier_off(netdev);

        err = i40e_vsi_open(vsi);
        if (err)
                return err;

        /* configure global TSO hardware offload settings */
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_F, be32_to_cpu(TCP_FLAG_PSH |
                                                       TCP_FLAG_FIN) >> 16);
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_M, be32_to_cpu(TCP_FLAG_PSH |
                                                       TCP_FLAG_FIN |
                                                       TCP_FLAG_CWR) >> 16);
        wr32(&pf->hw, I40E_GLLAN_TSOMSK_L, be32_to_cpu(TCP_FLAG_CWR) >> 16);

        udp_tunnel_get_rx_info(netdev);

        return 0;
}

/**
 * i40e_vsi_open -
 * @vsi: the VSI to open
 *
 * Finish initialization of the VSI.
 *
 * Returns 0 on success, negative value on failure
 *
 * Note: expects to be called while under rtnl_lock()
 **/
int i40e_vsi_open(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        char int_name[I40E_INT_NAME_STR_LEN];
        int err;

        /* allocate descriptors */
        err = i40e_vsi_setup_tx_resources(vsi);
        if (err)
                goto err_setup_tx;
        err = i40e_vsi_setup_rx_resources(vsi);
        if (err)
                goto err_setup_rx;

        err = i40e_vsi_configure(vsi);
        if (err)
                goto err_setup_rx;

        if (vsi->netdev) {
                snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
                         dev_driver_string(&pf->pdev->dev), vsi->netdev->name);
                err = i40e_vsi_request_irq(vsi, int_name);
                if (err)
                        goto err_setup_rx;

                /* Notify the stack of the actual queue counts. */
                err = netif_set_real_num_tx_queues(vsi->netdev,
                                                   vsi->num_queue_pairs);
                if (err)
                        goto err_set_queues;

                err = netif_set_real_num_rx_queues(vsi->netdev,
                                                   vsi->num_queue_pairs);
                if (err)
                        goto err_set_queues;

        } else if (vsi->type == I40E_VSI_FDIR) {
                snprintf(int_name, sizeof(int_name) - 1, "%s-%s:fdir",
                         dev_driver_string(&pf->pdev->dev),
                         dev_name(&pf->pdev->dev));
                err = i40e_vsi_request_irq(vsi, int_name);

        } else {
                err = -EINVAL;
                goto err_setup_rx;
        }

        err = i40e_up_complete(vsi);
        if (err)
                goto err_up_complete;

        return 0;

err_up_complete:
        i40e_down(vsi);
err_set_queues:
        i40e_vsi_free_irq(vsi);
err_setup_rx:
        i40e_vsi_free_rx_resources(vsi);
err_setup_tx:
        i40e_vsi_free_tx_resources(vsi);
        if (vsi == pf->vsi[pf->lan_vsi])
                i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED), true);

        return err;
}

/**
 * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
 * @pf: Pointer to PF
 *
 * This function destroys the hlist where all the Flow Director
 * filters were saved.
 **/
static void i40e_fdir_filter_exit(struct i40e_pf *pf)
{
        struct i40e_fdir_filter *filter;
        struct i40e_flex_pit *pit_entry, *tmp;
        struct hlist_node *node2;

        hlist_for_each_entry_safe(filter, node2,
                                  &pf->fdir_filter_list, fdir_node) {
                hlist_del(&filter->fdir_node);
                kfree(filter);
        }

        list_for_each_entry_safe(pit_entry, tmp, &pf->l3_flex_pit_list, list) {
                list_del(&pit_entry->list);
                kfree(pit_entry);
        }
        INIT_LIST_HEAD(&pf->l3_flex_pit_list);

        list_for_each_entry_safe(pit_entry, tmp, &pf->l4_flex_pit_list, list) {
                list_del(&pit_entry->list);
                kfree(pit_entry);
        }
        INIT_LIST_HEAD(&pf->l4_flex_pit_list);

        pf->fdir_pf_active_filters = 0;
        pf->fd_tcp4_filter_cnt = 0;
        pf->fd_udp4_filter_cnt = 0;
        pf->fd_sctp4_filter_cnt = 0;
        pf->fd_ip4_filter_cnt = 0;

        /* Reprogram the default input set for TCP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_TCP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for UDP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_UDP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for SCTP/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_SCTP,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK |
                                I40E_L4_SRC_MASK | I40E_L4_DST_MASK);

        /* Reprogram the default input set for Other/IPv4 */
        i40e_write_fd_input_set(pf, I40E_FILTER_PCTYPE_NONF_IPV4_OTHER,
                                I40E_L3_SRC_MASK | I40E_L3_DST_MASK);
}

/**
 * i40e_close - Disables a network interface
 * @netdev: network interface device structure
 *
 * The close entry point is called when an interface is de-activated
 * by the OS.  The hardware is still under the driver's control, but
 * this netdev interface is disabled.
 *
 * Returns 0, this is not allowed to fail
 **/
int i40e_close(struct net_device *netdev)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;

        i40e_vsi_close(vsi);

        return 0;
}

/**
 * i40e_do_reset - Start a PF or Core Reset sequence
 * @pf: board private structure
 * @reset_flags: which reset is requested
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 *
 * The essential difference in resets is that the PF Reset
 * doesn't clear the packet buffers, doesn't reset the PE
 * firmware, and doesn't bother the other PFs on the chip.
 **/
void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags, bool lock_acquired)
{
        u32 val;

        WARN_ON(in_interrupt());


        /* do the biggest reset indicated */
        if (reset_flags & BIT_ULL(__I40E_GLOBAL_RESET_REQUESTED)) {

                /* Request a Global Reset
                 *
                 * This will start the chip's countdown to the actual full
                 * chip reset event, and a warning interrupt to be sent
                 * to all PFs, including the requestor.  Our handler
                 * for the warning interrupt will deal with the shutdown
                 * and recovery of the switch setup.
                 */
                dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
                val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
                wr32(&pf->hw, I40E_GLGEN_RTRIG, val);

        } else if (reset_flags & BIT_ULL(__I40E_CORE_RESET_REQUESTED)) {

                /* Request a Core Reset
                 *
                 * Same as Global Reset, except does *not* include the MAC/PHY
                 */
                dev_dbg(&pf->pdev->dev, "CoreR requested\n");
                val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                val |= I40E_GLGEN_RTRIG_CORER_MASK;
                wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
                i40e_flush(&pf->hw);

        } else if (reset_flags & BIT_ULL(__I40E_PF_RESET_REQUESTED)) {

                /* Request a PF Reset
                 *
                 * Resets only the PF-specific registers
                 *
                 * This goes directly to the tear-down and rebuild of
                 * the switch, since we need to do all the recovery as
                 * for the Core Reset.
                 */
                dev_dbg(&pf->pdev->dev, "PFR requested\n");
                i40e_handle_reset_warning(pf, lock_acquired);

        } else if (reset_flags & BIT_ULL(__I40E_REINIT_REQUESTED)) {
                int v;

                /* Find the VSI(s) that requested a re-init */
                dev_info(&pf->pdev->dev,
                         "VSI reinit requested\n");
                for (v = 0; v < pf->num_alloc_vsi; v++) {
                        struct i40e_vsi *vsi = pf->vsi[v];

                        if (vsi != NULL &&
                            test_and_clear_bit(__I40E_VSI_REINIT_REQUESTED,
                                               vsi->state))
                                i40e_vsi_reinit_locked(pf->vsi[v]);
                }
        } else if (reset_flags & BIT_ULL(__I40E_DOWN_REQUESTED)) {
                int v;

                /* Find the VSI(s) that needs to be brought down */
                dev_info(&pf->pdev->dev, "VSI down requested\n");
                for (v = 0; v < pf->num_alloc_vsi; v++) {
                        struct i40e_vsi *vsi = pf->vsi[v];

                        if (vsi != NULL &&
                            test_and_clear_bit(__I40E_VSI_DOWN_REQUESTED,
                                               vsi->state)) {
                                set_bit(__I40E_VSI_DOWN, vsi->state);
                                i40e_down(vsi);
                        }
                }
        } else {
                dev_info(&pf->pdev->dev,
                         "bad reset request 0x%08x\n", reset_flags);
        }
}

#ifdef CONFIG_I40E_DCB
/**
 * i40e_dcb_need_reconfig - Check if DCB needs reconfig
 * @pf: board private structure
 * @old_cfg: current DCB config
 * @new_cfg: new DCB config
 **/
bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
                            struct i40e_dcbx_config *old_cfg,
                            struct i40e_dcbx_config *new_cfg)
{
        bool need_reconfig = false;

        /* Check if ETS configuration has changed */
        if (memcmp(&new_cfg->etscfg,
                   &old_cfg->etscfg,
                   sizeof(new_cfg->etscfg))) {
                /* If Priority Table has changed reconfig is needed */
                if (memcmp(&new_cfg->etscfg.prioritytable,
                           &old_cfg->etscfg.prioritytable,
                           sizeof(new_cfg->etscfg.prioritytable))) {
                        need_reconfig = true;
                        dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
                }

                if (memcmp(&new_cfg->etscfg.tcbwtable,
                           &old_cfg->etscfg.tcbwtable,
                           sizeof(new_cfg->etscfg.tcbwtable)))
                        dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");

                if (memcmp(&new_cfg->etscfg.tsatable,
                           &old_cfg->etscfg.tsatable,
                           sizeof(new_cfg->etscfg.tsatable)))
                        dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
        }

        /* Check if PFC configuration has changed */
        if (memcmp(&new_cfg->pfc,
                   &old_cfg->pfc,
                   sizeof(new_cfg->pfc))) {
                need_reconfig = true;
                dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
        }

        /* Check if APP Table has changed */
        if (memcmp(&new_cfg->app,
                   &old_cfg->app,
                   sizeof(new_cfg->app))) {
                need_reconfig = true;
                dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
        }

        dev_dbg(&pf->pdev->dev, "dcb need_reconfig=%d\n", need_reconfig);
        return need_reconfig;
}

/**
 * i40e_handle_lldp_event - Handle LLDP Change MIB event
 * @pf: board private structure
 * @e: event info posted on ARQ
 **/
static int i40e_handle_lldp_event(struct i40e_pf *pf,
                                  struct i40e_arq_event_info *e)
{
        struct i40e_aqc_lldp_get_mib *mib =
                (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_dcbx_config tmp_dcbx_cfg;
        bool need_reconfig = false;
        int ret = 0;
        u8 type;

        /* Not DCB capable or capability disabled */
        if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
                return ret;

        /* Ignore if event is not for Nearest Bridge */
        type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
                & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
        dev_dbg(&pf->pdev->dev, "LLDP event mib bridge type 0x%x\n", type);
        if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
                return ret;

        /* Check MIB Type and return if event for Remote MIB update */
        type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
        dev_dbg(&pf->pdev->dev,
                "LLDP event mib type %s\n", type ? "remote" : "local");
        if (type == I40E_AQ_LLDP_MIB_REMOTE) {
                /* Update the remote cached instance and return */
                ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
                                I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
                                &hw->remote_dcbx_config);
                goto exit;
        }

        /* Store the old configuration */
        tmp_dcbx_cfg = hw->local_dcbx_config;

        /* Reset the old DCBx configuration data */
        memset(&hw->local_dcbx_config, 0, sizeof(hw->local_dcbx_config));
        /* Get updated DCBX data from firmware */
        ret = i40e_get_dcb_config(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Failed querying DCB configuration data from firmware, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto exit;
        }

        /* No change detected in DCBX configs */
        if (!memcmp(&tmp_dcbx_cfg, &hw->local_dcbx_config,
                    sizeof(tmp_dcbx_cfg))) {
                dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
                goto exit;
        }

        need_reconfig = i40e_dcb_need_reconfig(pf, &tmp_dcbx_cfg,
                                               &hw->local_dcbx_config);

        i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &hw->local_dcbx_config);

        if (!need_reconfig)
                goto exit;

        /* Enable DCB tagging only when more than one TC */
        if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
                pf->flags |= I40E_FLAG_DCB_ENABLED;
        else
                pf->flags &= ~I40E_FLAG_DCB_ENABLED;

        set_bit(__I40E_PORT_SUSPENDED, pf->state);
        /* Reconfiguration needed quiesce all VSIs */
        i40e_pf_quiesce_all_vsi(pf);

        /* Changes in configuration update VEB/VSI */
        i40e_dcb_reconfigure(pf);

        ret = i40e_resume_port_tx(pf);

        clear_bit(__I40E_PORT_SUSPENDED, pf->state);
        /* In case of error no point in resuming VSIs */
        if (ret)
                goto exit;

        /* Wait for the PF's queues to be disabled */
        ret = i40e_pf_wait_queues_disabled(pf);
        if (ret) {
                /* Schedule PF reset to recover */
                set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                i40e_service_event_schedule(pf);
        } else {
                i40e_pf_unquiesce_all_vsi(pf);
        pf->flags |= (I40E_FLAG_SERVICE_CLIENT_REQUESTED |
                      I40E_FLAG_CLIENT_L2_CHANGE);
        }

exit:
        return ret;
}
#endif /* CONFIG_I40E_DCB */

/**
 * i40e_do_reset_safe - Protected reset path for userland calls.
 * @pf: board private structure
 * @reset_flags: which reset is requested
 *
 **/
void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
{
        rtnl_lock();
        i40e_do_reset(pf, reset_flags, true);
        rtnl_unlock();
}

/**
 * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
 * @pf: board private structure
 * @e: event info posted on ARQ
 *
 * Handler for LAN Queue Overflow Event generated by the firmware for PF
 * and VF queues
 **/
static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
                                           struct i40e_arq_event_info *e)
{
        struct i40e_aqc_lan_overflow *data =
                (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
        u32 queue = le32_to_cpu(data->prtdcb_rupto);
        u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vf *vf;
        u16 vf_id;

        dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
                queue, qtx_ctl);

        /* Queue belongs to VF, find the VF and issue VF reset */
        if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
            >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
                vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
                         >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
                vf_id -= hw->func_caps.vf_base_id;
                vf = &pf->vf[vf_id];
                i40e_vc_notify_vf_reset(vf);
                /* Allow VF to process pending reset notification */
                msleep(20);
                i40e_reset_vf(vf, false);
        }
}

/**
 * i40e_get_cur_guaranteed_fd_count - Get the consumed guaranteed FD filters
 * @pf: board private structure
 **/
u32 i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
        fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK);
        return fcnt_prog;
}

/**
 * i40e_get_current_fd_count - Get total FD filters programmed for this PF
 * @pf: board private structure
 **/
u32 i40e_get_current_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
        fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) +
                    ((val & I40E_PFQF_FDSTAT_BEST_CNT_MASK) >>
                      I40E_PFQF_FDSTAT_BEST_CNT_SHIFT);
        return fcnt_prog;
}

/**
 * i40e_get_global_fd_count - Get total FD filters programmed on device
 * @pf: board private structure
 **/
u32 i40e_get_global_fd_count(struct i40e_pf *pf)
{
        u32 val, fcnt_prog;

        val = rd32(&pf->hw, I40E_GLQF_FDCNT_0);
        fcnt_prog = (val & I40E_GLQF_FDCNT_0_GUARANT_CNT_MASK) +
                    ((val & I40E_GLQF_FDCNT_0_BESTCNT_MASK) >>
                     I40E_GLQF_FDCNT_0_BESTCNT_SHIFT);
        return fcnt_prog;
}

/**
 * i40e_fdir_check_and_reenable - Function to reenabe FD ATR or SB if disabled
 * @pf: board private structure
 **/
void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
{
        struct i40e_fdir_filter *filter;
        u32 fcnt_prog, fcnt_avail;
        struct hlist_node *node;

        if (test_bit(__I40E_FD_FLUSH_REQUESTED, pf->state))
                return;

        /* Check if we have enough room to re-enable FDir SB capability. */
        fcnt_prog = i40e_get_global_fd_count(pf);
        fcnt_avail = pf->fdir_pf_filter_count;
        if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM)) ||
            (pf->fd_add_err == 0) ||
            (i40e_get_current_atr_cnt(pf) < pf->fd_atr_cnt)) {
                if (pf->flags & I40E_FLAG_FD_SB_AUTO_DISABLED) {
                        pf->flags &= ~I40E_FLAG_FD_SB_AUTO_DISABLED;
                        if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
                            (I40E_DEBUG_FD & pf->hw.debug_mask))
                                dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n");
                }
        }

        /* We should wait for even more space before re-enabling ATR.
         * Additionally, we cannot enable ATR as long as we still have TCP SB
         * rules active.
         */
        if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) &&
            (pf->fd_tcp4_filter_cnt == 0)) {
                if (pf->flags & I40E_FLAG_FD_ATR_AUTO_DISABLED) {
                        pf->flags &= ~I40E_FLAG_FD_ATR_AUTO_DISABLED;
                        if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
                            (I40E_DEBUG_FD & pf->hw.debug_mask))
                                dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table and there are no conflicting ntuple rules\n");
                }
        }

        /* if hw had a problem adding a filter, delete it */
        if (pf->fd_inv > 0) {
                hlist_for_each_entry_safe(filter, node,
                                          &pf->fdir_filter_list, fdir_node) {
                        if (filter->fd_id == pf->fd_inv) {
                                hlist_del(&filter->fdir_node);
                                kfree(filter);
                                pf->fdir_pf_active_filters--;
                        }
                }
        }
}

#define I40E_MIN_FD_FLUSH_INTERVAL 10
#define I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE 30
/**
 * i40e_fdir_flush_and_replay - Function to flush all FD filters and replay SB
 * @pf: board private structure
 **/
static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
{
        unsigned long min_flush_time;
        int flush_wait_retry = 50;
        bool disable_atr = false;
        int fd_room;
        int reg;

        if (!time_after(jiffies, pf->fd_flush_timestamp +
                                 (I40E_MIN_FD_FLUSH_INTERVAL * HZ)))
                return;

        /* If the flush is happening too quick and we have mostly SB rules we
         * should not re-enable ATR for some time.
         */
        min_flush_time = pf->fd_flush_timestamp +
                         (I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE * HZ);
        fd_room = pf->fdir_pf_filter_count - pf->fdir_pf_active_filters;

        if (!(time_after(jiffies, min_flush_time)) &&
            (fd_room < I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) {
                if (I40E_DEBUG_FD & pf->hw.debug_mask)
                        dev_info(&pf->pdev->dev, "ATR disabled, not enough FD filter space.\n");
                disable_atr = true;
        }

        pf->fd_flush_timestamp = jiffies;
        pf->flags |= I40E_FLAG_FD_ATR_AUTO_DISABLED;
        /* flush all filters */
        wr32(&pf->hw, I40E_PFQF_CTL_1,
             I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
        i40e_flush(&pf->hw);
        pf->fd_flush_cnt++;
        pf->fd_add_err = 0;
        do {
                /* Check FD flush status every 5-6msec */
                usleep_range(5000, 6000);
                reg = rd32(&pf->hw, I40E_PFQF_CTL_1);
                if (!(reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK))
                        break;
        } while (flush_wait_retry--);
        if (reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK) {
                dev_warn(&pf->pdev->dev, "FD table did not flush, needs more time\n");
        } else {
                /* replay sideband filters */
                i40e_fdir_filter_restore(pf->vsi[pf->lan_vsi]);
                if (!disable_atr && !pf->fd_tcp4_filter_cnt)
                        pf->flags &= ~I40E_FLAG_FD_ATR_AUTO_DISABLED;
                clear_bit(__I40E_FD_FLUSH_REQUESTED, pf->state);
                if (I40E_DEBUG_FD & pf->hw.debug_mask)
                        dev_info(&pf->pdev->dev, "FD Filter table flushed and FD-SB replayed.\n");
        }
}

/**
 * i40e_get_current_atr_count - Get the count of total FD ATR filters programmed
 * @pf: board private structure
 **/
u32 i40e_get_current_atr_cnt(struct i40e_pf *pf)
{
        return i40e_get_current_fd_count(pf) - pf->fdir_pf_active_filters;
}

/* We can see up to 256 filter programming desc in transit if the filters are
 * being applied really fast; before we see the first
 * filter miss error on Rx queue 0. Accumulating enough error messages before
 * reacting will make sure we don't cause flush too often.
 */
#define I40E_MAX_FD_PROGRAM_ERROR 256

/**
 * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
 * @pf: board private structure
 **/
static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
{

        /* if interface is down do nothing */
        if (test_bit(__I40E_DOWN, pf->state))
                return;

        if (test_bit(__I40E_FD_FLUSH_REQUESTED, pf->state))
                i40e_fdir_flush_and_replay(pf);

        i40e_fdir_check_and_reenable(pf);

}

/**
 * i40e_vsi_link_event - notify VSI of a link event
 * @vsi: vsi to be notified
 * @link_up: link up or down
 **/
static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
{
        if (!vsi || test_bit(__I40E_VSI_DOWN, vsi->state))
                return;

        switch (vsi->type) {
        case I40E_VSI_MAIN:
                if (!vsi->netdev || !vsi->netdev_registered)
                        break;

                if (link_up) {
                        netif_carrier_on(vsi->netdev);
                        netif_tx_wake_all_queues(vsi->netdev);
                } else {
                        netif_carrier_off(vsi->netdev);
                        netif_tx_stop_all_queues(vsi->netdev);
                }
                break;

        case I40E_VSI_SRIOV:
        case I40E_VSI_VMDQ2:
        case I40E_VSI_CTRL:
        case I40E_VSI_IWARP:
        case I40E_VSI_MIRROR:
        default:
                /* there is no notification for other VSIs */
                break;
        }
}

/**
 * i40e_veb_link_event - notify elements on the veb of a link event
 * @veb: veb to be notified
 * @link_up: link up or down
 **/
static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
{
        struct i40e_pf *pf;
        int i;

        if (!veb || !veb->pf)
                return;
        pf = veb->pf;

        /* depth first... */
        for (i = 0; i < I40E_MAX_VEB; i++)
                if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
                        i40e_veb_link_event(pf->veb[i], link_up);

        /* ... now the local VSIs */
        for (i = 0; i < pf->num_alloc_vsi; i++)
                if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
                        i40e_vsi_link_event(pf->vsi[i], link_up);
}

/**
 * i40e_link_event - Update netif_carrier status
 * @pf: board private structure
 **/
static void i40e_link_event(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
        u8 new_link_speed, old_link_speed;
        i40e_status status;
        bool new_link, old_link;

        /* save off old link status information */
        pf->hw.phy.link_info_old = pf->hw.phy.link_info;

        /* set this to force the get_link_status call to refresh state */
        pf->hw.phy.get_link_info = true;

        old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);

        status = i40e_get_link_status(&pf->hw, &new_link);

        /* On success, disable temp link polling */
        if (status == I40E_SUCCESS) {
                if (pf->flags & I40E_FLAG_TEMP_LINK_POLLING)
                        pf->flags &= ~I40E_FLAG_TEMP_LINK_POLLING;
        } else {
                /* Enable link polling temporarily until i40e_get_link_status
                 * returns I40E_SUCCESS
                 */
                pf->flags |= I40E_FLAG_TEMP_LINK_POLLING;
                dev_dbg(&pf->pdev->dev, "couldn't get link state, status: %d\n",
                        status);
                return;
        }

        old_link_speed = pf->hw.phy.link_info_old.link_speed;
        new_link_speed = pf->hw.phy.link_info.link_speed;

        if (new_link == old_link &&
            new_link_speed == old_link_speed &&
            (test_bit(__I40E_VSI_DOWN, vsi->state) ||
             new_link == netif_carrier_ok(vsi->netdev)))
                return;

        if (!test_bit(__I40E_VSI_DOWN, vsi->state))
                i40e_print_link_message(vsi, new_link);

        /* Notify the base of the switch tree connected to
         * the link.  Floating VEBs are not notified.
         */
        if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
                i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
        else
                i40e_vsi_link_event(vsi, new_link);

        if (pf->vf)
                i40e_vc_notify_link_state(pf);

        if (pf->flags & I40E_FLAG_PTP)
                i40e_ptp_set_increment(pf);
}

/**
 * i40e_watchdog_subtask - periodic checks not using event driven response
 * @pf: board private structure
 **/
static void i40e_watchdog_subtask(struct i40e_pf *pf)
{
        int i;

        /* if interface is down do nothing */
        if (test_bit(__I40E_DOWN, pf->state) ||
            test_bit(__I40E_CONFIG_BUSY, pf->state))
                return;

        /* make sure we don't do these things too often */
        if (time_before(jiffies, (pf->service_timer_previous +
                                  pf->service_timer_period)))
                return;
        pf->service_timer_previous = jiffies;

        if ((pf->flags & I40E_FLAG_LINK_POLLING_ENABLED) ||
            (pf->flags & I40E_FLAG_TEMP_LINK_POLLING))
                i40e_link_event(pf);

        /* Update the stats for active netdevs so the network stack
         * can look at updated numbers whenever it cares to
         */
        for (i = 0; i < pf->num_alloc_vsi; i++)
                if (pf->vsi[i] && pf->vsi[i]->netdev)
                        i40e_update_stats(pf->vsi[i]);

        if (pf->flags & I40E_FLAG_VEB_STATS_ENABLED) {
                /* Update the stats for the active switching components */
                for (i = 0; i < I40E_MAX_VEB; i++)
                        if (pf->veb[i])
                                i40e_update_veb_stats(pf->veb[i]);
        }

        i40e_ptp_rx_hang(pf);
        i40e_ptp_tx_hang(pf);
}

/**
 * i40e_reset_subtask - Set up for resetting the device and driver
 * @pf: board private structure
 **/
static void i40e_reset_subtask(struct i40e_pf *pf)
{
        u32 reset_flags = 0;

        if (test_bit(__I40E_REINIT_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_REINIT_REQUESTED);
                clear_bit(__I40E_REINIT_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_PF_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_PF_RESET_REQUESTED);
                clear_bit(__I40E_PF_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_CORE_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_CORE_RESET_REQUESTED);
                clear_bit(__I40E_CORE_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_GLOBAL_RESET_REQUESTED);
                clear_bit(__I40E_GLOBAL_RESET_REQUESTED, pf->state);
        }
        if (test_bit(__I40E_DOWN_REQUESTED, pf->state)) {
                reset_flags |= BIT(__I40E_DOWN_REQUESTED);
                clear_bit(__I40E_DOWN_REQUESTED, pf->state);
        }

        /* If there's a recovery already waiting, it takes
         * precedence before starting a new reset sequence.
         */
        if (test_bit(__I40E_RESET_INTR_RECEIVED, pf->state)) {
                i40e_prep_for_reset(pf, false);
                i40e_reset(pf);
                i40e_rebuild(pf, false, false);
        }

        /* If we're already down or resetting, just bail */
        if (reset_flags &&
            !test_bit(__I40E_DOWN, pf->state) &&
            !test_bit(__I40E_CONFIG_BUSY, pf->state)) {
                i40e_do_reset(pf, reset_flags, false);
        }
}

/**
 * i40e_handle_link_event - Handle link event
 * @pf: board private structure
 * @e: event info posted on ARQ
 **/
static void i40e_handle_link_event(struct i40e_pf *pf,
                                   struct i40e_arq_event_info *e)
{
        struct i40e_aqc_get_link_status *status =
                (struct i40e_aqc_get_link_status *)&e->desc.params.raw;

        /* Do a new status request to re-enable LSE reporting
         * and load new status information into the hw struct
         * This completely ignores any state information
         * in the ARQ event info, instead choosing to always
         * issue the AQ update link status command.
         */
        i40e_link_event(pf);

        /* check for unqualified module, if link is down */
        if ((status->link_info & I40E_AQ_MEDIA_AVAILABLE) &&
            (!(status->an_info & I40E_AQ_QUALIFIED_MODULE)) &&
            (!(status->link_info & I40E_AQ_LINK_UP)))
                dev_err(&pf->pdev->dev,
                        "The driver failed to link because an unqualified module was detected.\n");
}

/**
 * i40e_clean_adminq_subtask - Clean the AdminQ rings
 * @pf: board private structure
 **/
static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
{
        struct i40e_arq_event_info event;
        struct i40e_hw *hw = &pf->hw;
        u16 pending, i = 0;
        i40e_status ret;
        u16 opcode;
        u32 oldval;
        u32 val;

        /* Do not run clean AQ when PF reset fails */
        if (test_bit(__I40E_RESET_FAILED, pf->state))
                return;

        /* check for error indications */
        val = rd32(&pf->hw, pf->hw.aq.arq.len);
        oldval = val;
        if (val & I40E_PF_ARQLEN_ARQVFE_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ VF Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQVFE_MASK;
        }
        if (val & I40E_PF_ARQLEN_ARQOVFL_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ Overflow Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQOVFL_MASK;
                pf->arq_overflows++;
        }
        if (val & I40E_PF_ARQLEN_ARQCRIT_MASK) {
                if (hw->debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ARQ Critical Error detected\n");
                val &= ~I40E_PF_ARQLEN_ARQCRIT_MASK;
        }
        if (oldval != val)
                wr32(&pf->hw, pf->hw.aq.arq.len, val);

        val = rd32(&pf->hw, pf->hw.aq.asq.len);
        oldval = val;
        if (val & I40E_PF_ATQLEN_ATQVFE_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ VF Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQVFE_MASK;
        }
        if (val & I40E_PF_ATQLEN_ATQOVFL_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ Overflow Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQOVFL_MASK;
        }
        if (val & I40E_PF_ATQLEN_ATQCRIT_MASK) {
                if (pf->hw.debug_mask & I40E_DEBUG_AQ)
                        dev_info(&pf->pdev->dev, "ASQ Critical Error detected\n");
                val &= ~I40E_PF_ATQLEN_ATQCRIT_MASK;
        }
        if (oldval != val)
                wr32(&pf->hw, pf->hw.aq.asq.len, val);

        event.buf_len = I40E_MAX_AQ_BUF_SIZE;
        event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
        if (!event.msg_buf)
                return;

        do {
                ret = i40e_clean_arq_element(hw, &event, &pending);
                if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK)
                        break;
                else if (ret) {
                        dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
                        break;
                }

                opcode = le16_to_cpu(event.desc.opcode);
                switch (opcode) {

                case i40e_aqc_opc_get_link_status:
                        i40e_handle_link_event(pf, &event);
                        break;
                case i40e_aqc_opc_send_msg_to_pf:
                        ret = i40e_vc_process_vf_msg(pf,
                                        le16_to_cpu(event.desc.retval),
                                        le32_to_cpu(event.desc.cookie_high),
                                        le32_to_cpu(event.desc.cookie_low),
                                        event.msg_buf,
                                        event.msg_len);
                        break;
                case i40e_aqc_opc_lldp_update_mib:
                        dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
#ifdef CONFIG_I40E_DCB
                        rtnl_lock();
                        ret = i40e_handle_lldp_event(pf, &event);
                        rtnl_unlock();
#endif /* CONFIG_I40E_DCB */
                        break;
                case i40e_aqc_opc_event_lan_overflow:
                        dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
                        i40e_handle_lan_overflow_event(pf, &event);
                        break;
                case i40e_aqc_opc_send_msg_to_peer:
                        dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
                        break;
                case i40e_aqc_opc_nvm_erase:
                case i40e_aqc_opc_nvm_update:
                case i40e_aqc_opc_oem_post_update:
                        i40e_debug(&pf->hw, I40E_DEBUG_NVM,
                                   "ARQ NVM operation 0x%04x completed\n",
                                   opcode);
                        break;
                default:
                        dev_info(&pf->pdev->dev,
                                 "ARQ: Unknown event 0x%04x ignored\n",
                                 opcode);
                        break;
                }
        } while (i++ < pf->adminq_work_limit);

        if (i < pf->adminq_work_limit)
                clear_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state);

        /* re-enable Admin queue interrupt cause */
        val = rd32(hw, I40E_PFINT_ICR0_ENA);
        val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
        wr32(hw, I40E_PFINT_ICR0_ENA, val);
        i40e_flush(hw);

        kfree(event.msg_buf);
}

/**
 * i40e_verify_eeprom - make sure eeprom is good to use
 * @pf: board private structure
 **/
static void i40e_verify_eeprom(struct i40e_pf *pf)
{
        int err;

        err = i40e_diag_eeprom_test(&pf->hw);
        if (err) {
                /* retry in case of garbage read */
                err = i40e_diag_eeprom_test(&pf->hw);
                if (err) {
                        dev_info(&pf->pdev->dev, "eeprom check failed (%d), Tx/Rx traffic disabled\n",
                                 err);
                        set_bit(__I40E_BAD_EEPROM, pf->state);
                }
        }

        if (!err && test_bit(__I40E_BAD_EEPROM, pf->state)) {
                dev_info(&pf->pdev->dev, "eeprom check passed, Tx/Rx traffic enabled\n");
                clear_bit(__I40E_BAD_EEPROM, pf->state);
        }
}

/**
 * i40e_enable_pf_switch_lb
 * @pf: pointer to the PF structure
 *
 * enable switch loop back or die - no point in a return value
 **/
static void i40e_enable_pf_switch_lb(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
        struct i40e_vsi_context ctxt;
        int ret;

        ctxt.seid = pf->main_vsi_seid;
        ctxt.pf_num = pf->hw.pf_id;
        ctxt.vf_num = 0;
        ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return;
        }
        ctxt.flags = I40E_AQ_VSI_TYPE_PF;
        ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
        ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);

        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "update vsi switch failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }
}

/**
 * i40e_disable_pf_switch_lb
 * @pf: pointer to the PF structure
 *
 * disable switch loop back or die - no point in a return value
 **/
static void i40e_disable_pf_switch_lb(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
        struct i40e_vsi_context ctxt;
        int ret;

        ctxt.seid = pf->main_vsi_seid;
        ctxt.pf_num = pf->hw.pf_id;
        ctxt.vf_num = 0;
        ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get PF vsi config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return;
        }
        ctxt.flags = I40E_AQ_VSI_TYPE_PF;
        ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
        ctxt.info.switch_id &= ~cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);

        ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "update vsi switch failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        }
}

/**
 * i40e_config_bridge_mode - Configure the HW bridge mode
 * @veb: pointer to the bridge instance
 *
 * Configure the loop back mode for the LAN VSI that is downlink to the
 * specified HW bridge instance. It is expected this function is called
 * when a new HW bridge is instantiated.
 **/
static void i40e_config_bridge_mode(struct i40e_veb *veb)
{
        struct i40e_pf *pf = veb->pf;

        if (pf->hw.debug_mask & I40E_DEBUG_LAN)
                dev_info(&pf->pdev->dev, "enabling bridge mode: %s\n",
                         veb->bridge_mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
        if (veb->bridge_mode & BRIDGE_MODE_VEPA)
                i40e_disable_pf_switch_lb(pf);
        else
                i40e_enable_pf_switch_lb(pf);
}

/**
 * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
 * @veb: pointer to the VEB instance
 *
 * This is a recursive function that first builds the attached VSIs then
 * recurses in to build the next layer of VEB.  We track the connections
 * through our own index numbers because the seid's from the HW could
 * change across the reset.
 **/
static int i40e_reconstitute_veb(struct i40e_veb *veb)
{
        struct i40e_vsi *ctl_vsi = NULL;
        struct i40e_pf *pf = veb->pf;
        int v, veb_idx;
        int ret;

        /* build VSI that owns this VEB, temporarily attached to base VEB */
        for (v = 0; v < pf->num_alloc_vsi && !ctl_vsi; v++) {
                if (pf->vsi[v] &&
                    pf->vsi[v]->veb_idx == veb->idx &&
                    pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
                        ctl_vsi = pf->vsi[v];
                        break;
                }
        }
        if (!ctl_vsi) {
                dev_info(&pf->pdev->dev,
                         "missing owner VSI for veb_idx %d\n", veb->idx);
                ret = -ENOENT;
                goto end_reconstitute;
        }
        if (ctl_vsi != pf->vsi[pf->lan_vsi])
                ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
        ret = i40e_add_vsi(ctl_vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "rebuild of veb_idx %d owner VSI failed: %d\n",
                         veb->idx, ret);
                goto end_reconstitute;
        }
        i40e_vsi_reset_stats(ctl_vsi);

        /* create the VEB in the switch and move the VSI onto the VEB */
        ret = i40e_add_veb(veb, ctl_vsi);
        if (ret)
                goto end_reconstitute;

        if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
                veb->bridge_mode = BRIDGE_MODE_VEB;
        else
                veb->bridge_mode = BRIDGE_MODE_VEPA;
        i40e_config_bridge_mode(veb);

        /* create the remaining VSIs attached to this VEB */
        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
                        continue;

                if (pf->vsi[v]->veb_idx == veb->idx) {
                        struct i40e_vsi *vsi = pf->vsi[v];

                        vsi->uplink_seid = veb->seid;
                        ret = i40e_add_vsi(vsi);
                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "rebuild of vsi_idx %d failed: %d\n",
                                         v, ret);
                                goto end_reconstitute;
                        }
                        i40e_vsi_reset_stats(vsi);
                }
        }

        /* create any VEBs attached to this VEB - RECURSION */
        for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
                if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
                        pf->veb[veb_idx]->uplink_seid = veb->seid;
                        ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
                        if (ret)
                                break;
                }
        }

end_reconstitute:
        return ret;
}

/**
 * i40e_get_capabilities - get info about the HW
 * @pf: the PF struct
 **/
static int i40e_get_capabilities(struct i40e_pf *pf)
{
        struct i40e_aqc_list_capabilities_element_resp *cap_buf;
        u16 data_size;
        int buf_len;
        int err;

        buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
        do {
                cap_buf = kzalloc(buf_len, GFP_KERNEL);
                if (!cap_buf)
                        return -ENOMEM;

                /* this loads the data into the hw struct for us */
                err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
                                            &data_size,
                                            i40e_aqc_opc_list_func_capabilities,
                                            NULL);
                /* data loaded, buffer no longer needed */
                kfree(cap_buf);

                if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
                        /* retry with a larger buffer */
                        buf_len = data_size;
                } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
                        dev_info(&pf->pdev->dev,
                                 "capability discovery failed, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, err),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return -ENODEV;
                }
        } while (err);

        if (pf->hw.debug_mask & I40E_DEBUG_USER)
                dev_info(&pf->pdev->dev,
                         "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
                         pf->hw.pf_id, pf->hw.func_caps.num_vfs,
                         pf->hw.func_caps.num_msix_vectors,
                         pf->hw.func_caps.num_msix_vectors_vf,
                         pf->hw.func_caps.fd_filters_guaranteed,
                         pf->hw.func_caps.fd_filters_best_effort,
                         pf->hw.func_caps.num_tx_qp,
                         pf->hw.func_caps.num_vsis);

#define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
                       + pf->hw.func_caps.num_vfs)
        if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
                dev_info(&pf->pdev->dev,
                         "got num_vsis %d, setting num_vsis to %d\n",
                         pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
                pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
        }

        return 0;
}

static int i40e_vsi_clear(struct i40e_vsi *vsi);

/**
 * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
 * @pf: board private structure
 **/
static void i40e_fdir_sb_setup(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;

        /* quick workaround for an NVM issue that leaves a critical register
         * uninitialized
         */
        if (!rd32(&pf->hw, I40E_GLQF_HKEY(0))) {
                static const u32 hkey[] = {
                        0xe640d33f, 0xcdfe98ab, 0x73fa7161, 0x0d7a7d36,
                        0xeacb7d61, 0xaa4f05b6, 0x9c5c89ed, 0xfc425ddb,
                        0xa4654832, 0xfc7461d4, 0x8f827619, 0xf5c63c21,
                        0x95b3a76d};
                int i;

                for (i = 0; i <= I40E_GLQF_HKEY_MAX_INDEX; i++)
                        wr32(&pf->hw, I40E_GLQF_HKEY(i), hkey[i]);
        }

        if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
                return;

        /* find existing VSI and see if it needs configuring */
        vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);

        /* create a new VSI if none exists */
        if (!vsi) {
                vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR,
                                     pf->vsi[pf->lan_vsi]->seid, 0);
                if (!vsi) {
                        dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
                        pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
                        return;
                }
        }

        i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
}

/**
 * i40e_fdir_teardown - release the Flow Director resources
 * @pf: board private structure
 **/
static void i40e_fdir_teardown(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi;

        i40e_fdir_filter_exit(pf);
        vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);
        if (vsi)
                i40e_vsi_release(vsi);
}

/**
 * i40e_prep_for_reset - prep for the core to reset
 * @pf: board private structure
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 *
 * Close up the VFs and other things in prep for PF Reset.
  **/
static void i40e_prep_for_reset(struct i40e_pf *pf, bool lock_acquired)
{
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret = 0;
        u32 v;

        clear_bit(__I40E_RESET_INTR_RECEIVED, pf->state);
        if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                return;
        if (i40e_check_asq_alive(&pf->hw))
                i40e_vc_notify_reset(pf);

        dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");

        /* quiesce the VSIs and their queues that are not already DOWN */
        /* pf_quiesce_all_vsi modifies netdev structures -rtnl_lock needed */
        if (!lock_acquired)
                rtnl_lock();
        i40e_pf_quiesce_all_vsi(pf);
        if (!lock_acquired)
                rtnl_unlock();

        for (v = 0; v < pf->num_alloc_vsi; v++) {
                if (pf->vsi[v])
                        pf->vsi[v]->seid = 0;
        }

        i40e_shutdown_adminq(&pf->hw);

        /* call shutdown HMC */
        if (hw->hmc.hmc_obj) {
                ret = i40e_shutdown_lan_hmc(hw);
                if (ret)
                        dev_warn(&pf->pdev->dev,
                                 "shutdown_lan_hmc failed: %d\n", ret);
        }
}

/**
 * i40e_send_version - update firmware with driver version
 * @pf: PF struct
 */
static void i40e_send_version(struct i40e_pf *pf)
{
        struct i40e_driver_version dv;

        dv.major_version = DRV_VERSION_MAJOR;
        dv.minor_version = DRV_VERSION_MINOR;
        dv.build_version = DRV_VERSION_BUILD;
        dv.subbuild_version = 0;
        strlcpy(dv.driver_string, DRV_VERSION, sizeof(dv.driver_string));
        i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
}

/**
 * i40e_get_oem_version - get OEM specific version information
 * @hw: pointer to the hardware structure
 **/
static void i40e_get_oem_version(struct i40e_hw *hw)
{
        u16 block_offset = 0xffff;
        u16 block_length = 0;
        u16 capabilities = 0;
        u16 gen_snap = 0;
        u16 release = 0;

#define I40E_SR_NVM_OEM_VERSION_PTR             0x1B
#define I40E_NVM_OEM_LENGTH_OFFSET              0x00
#define I40E_NVM_OEM_CAPABILITIES_OFFSET        0x01
#define I40E_NVM_OEM_GEN_OFFSET                 0x02
#define I40E_NVM_OEM_RELEASE_OFFSET             0x03
#define I40E_NVM_OEM_CAPABILITIES_MASK          0x000F
#define I40E_NVM_OEM_LENGTH                     3

        /* Check if pointer to OEM version block is valid. */
        i40e_read_nvm_word(hw, I40E_SR_NVM_OEM_VERSION_PTR, &block_offset);
        if (block_offset == 0xffff)
                return;

        /* Check if OEM version block has correct length. */
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_LENGTH_OFFSET,
                           &block_length);
        if (block_length < I40E_NVM_OEM_LENGTH)
                return;

        /* Check if OEM version format is as expected. */
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_CAPABILITIES_OFFSET,
                           &capabilities);
        if ((capabilities & I40E_NVM_OEM_CAPABILITIES_MASK) != 0)
                return;

        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_GEN_OFFSET,
                           &gen_snap);
        i40e_read_nvm_word(hw, block_offset + I40E_NVM_OEM_RELEASE_OFFSET,
                           &release);
        hw->nvm.oem_ver = (gen_snap << I40E_OEM_SNAP_SHIFT) | release;
        hw->nvm.eetrack = I40E_OEM_EETRACK_ID;
}

/**
 * i40e_reset - wait for core reset to finish reset, reset pf if corer not seen
 * @pf: board private structure
 **/
static int i40e_reset(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret;

        ret = i40e_pf_reset(hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
                set_bit(__I40E_RESET_FAILED, pf->state);
                clear_bit(__I40E_RESET_RECOVERY_PENDING, pf->state);
        } else {
                pf->pfr_count++;
        }
        return ret;
}

/**
 * i40e_rebuild - rebuild using a saved config
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_rebuild(struct i40e_pf *pf, bool reinit, bool lock_acquired)
{
        struct i40e_hw *hw = &pf->hw;
        u8 set_fc_aq_fail = 0;
        i40e_status ret;
        u32 val;
        int v;

        if (test_bit(__I40E_DOWN, pf->state))
                goto clear_recovery;
        dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");

        /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
        ret = i40e_init_adminq(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                goto clear_recovery;
        }
        i40e_get_oem_version(&pf->hw);

        /* re-verify the eeprom if we just had an EMP reset */
        if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, pf->state))
                i40e_verify_eeprom(pf);

        i40e_clear_pxe_mode(hw);
        ret = i40e_get_capabilities(pf);
        if (ret)
                goto end_core_reset;

        ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
                                hw->func_caps.num_rx_qp, 0, 0);
        if (ret) {
                dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
                goto end_core_reset;
        }
        ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
        if (ret) {
                dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
                goto end_core_reset;
        }

#ifdef CONFIG_I40E_DCB
        ret = i40e_init_pf_dcb(pf);
        if (ret) {
                dev_info(&pf->pdev->dev, "DCB init failed %d, disabled\n", ret);
                pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
                /* Continue without DCB enabled */
        }
#endif /* CONFIG_I40E_DCB */
        /* do basic switch setup */
        if (!lock_acquired)
                rtnl_lock();
        ret = i40e_setup_pf_switch(pf, reinit);
        if (ret)
                goto end_unlock;

        /* The driver only wants link up/down and module qualification
         * reports from firmware.  Note the negative logic.
         */
        ret = i40e_aq_set_phy_int_mask(&pf->hw,
                                       ~(I40E_AQ_EVENT_LINK_UPDOWN |
                                         I40E_AQ_EVENT_MEDIA_NA |
                                         I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
        if (ret)
                dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* make sure our flow control settings are restored */
        ret = i40e_set_fc(&pf->hw, &set_fc_aq_fail, true);
        if (ret)
                dev_dbg(&pf->pdev->dev, "setting flow control: ret = %s last_status = %s\n",
                        i40e_stat_str(&pf->hw, ret),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* Rebuild the VSIs and VEBs that existed before reset.
         * They are still in our local switch element arrays, so only
         * need to rebuild the switch model in the HW.
         *
         * If there were VEBs but the reconstitution failed, we'll try
         * try to recover minimal use by getting the basic PF VSI working.
         */
        if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
                dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");
                /* find the one VEB connected to the MAC, and find orphans */
                for (v = 0; v < I40E_MAX_VEB; v++) {
                        if (!pf->veb[v])
                                continue;

                        if (pf->veb[v]->uplink_seid == pf->mac_seid ||
                            pf->veb[v]->uplink_seid == 0) {
                                ret = i40e_reconstitute_veb(pf->veb[v]);

                                if (!ret)
                                        continue;

                                /* If Main VEB failed, we're in deep doodoo,
                                 * so give up rebuilding the switch and set up
                                 * for minimal rebuild of PF VSI.
                                 * If orphan failed, we'll report the error
                                 * but try to keep going.
                                 */
                                if (pf->veb[v]->uplink_seid == pf->mac_seid) {
                                        dev_info(&pf->pdev->dev,
                                                 "rebuild of switch failed: %d, will try to set up simple PF connection\n",
                                                 ret);
                                        pf->vsi[pf->lan_vsi]->uplink_seid
                                                                = pf->mac_seid;
                                        break;
                                } else if (pf->veb[v]->uplink_seid == 0) {
                                        dev_info(&pf->pdev->dev,
                                                 "rebuild of orphan VEB failed: %d\n",
                                                 ret);
                                }
                        }
                }
        }

        if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
                dev_dbg(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
                /* no VEB, so rebuild only the Main VSI */
                ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "rebuild of Main VSI failed: %d\n", ret);
                        goto end_unlock;
                }
        }

        /* Reconfigure hardware for allowing smaller MSS in the case
         * of TSO, so that we avoid the MDD being fired and causing
         * a reset in the case of small MSS+TSO.
         */
#define I40E_REG_MSS          0x000E64DC
#define I40E_REG_MSS_MIN_MASK 0x3FF0000
#define I40E_64BYTE_MSS       0x400000
        val = rd32(hw, I40E_REG_MSS);
        if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
                val &= ~I40E_REG_MSS_MIN_MASK;
                val |= I40E_64BYTE_MSS;
                wr32(hw, I40E_REG_MSS, val);
        }

        if (pf->hw_features & I40E_HW_RESTART_AUTONEG) {
                msleep(75);
                ret = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
                if (ret)
                        dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
        }
        /* reinit the misc interrupt */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                ret = i40e_setup_misc_vector(pf);

        /* Add a filter to drop all Flow control frames from any VSI from being
         * transmitted. By doing so we stop a malicious VF from sending out
         * PAUSE or PFC frames and potentially controlling traffic for other
         * PF/VF VSIs.
         * The FW can still send Flow control frames if enabled.
         */
        i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
                                                       pf->main_vsi_seid);

        /* restart the VSIs that were rebuilt and running before the reset */
        i40e_pf_unquiesce_all_vsi(pf);

        /* Release the RTNL lock before we start resetting VFs */
        if (!lock_acquired)
                rtnl_unlock();

        i40e_reset_all_vfs(pf, true);

        /* tell the firmware that we're starting */
        i40e_send_version(pf);

        /* We've already released the lock, so don't do it again */
        goto end_core_reset;

end_unlock:
        if (!lock_acquired)
                rtnl_unlock();
end_core_reset:
        clear_bit(__I40E_RESET_FAILED, pf->state);
clear_recovery:
        clear_bit(__I40E_RESET_RECOVERY_PENDING, pf->state);
}

/**
 * i40e_reset_and_rebuild - reset and rebuild using a saved config
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit,
                                   bool lock_acquired)
{
        int ret;
        /* Now we wait for GRST to settle out.
         * We don't have to delete the VEBs or VSIs from the hw switch
         * because the reset will make them disappear.
         */
        ret = i40e_reset(pf);
        if (!ret)
                i40e_rebuild(pf, reinit, lock_acquired);
}

/**
 * i40e_handle_reset_warning - prep for the PF to reset, reset and rebuild
 * @pf: board private structure
 *
 * Close up the VFs and other things in prep for a Core Reset,
 * then get ready to rebuild the world.
 * @lock_acquired: indicates whether or not the lock has been acquired
 * before this function was called.
 **/
static void i40e_handle_reset_warning(struct i40e_pf *pf, bool lock_acquired)
{
        i40e_prep_for_reset(pf, lock_acquired);
        i40e_reset_and_rebuild(pf, false, lock_acquired);
}

/**
 * i40e_handle_mdd_event
 * @pf: pointer to the PF structure
 *
 * Called from the MDD irq handler to identify possibly malicious vfs
 **/
static void i40e_handle_mdd_event(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        bool mdd_detected = false;
        bool pf_mdd_detected = false;
        struct i40e_vf *vf;
        u32 reg;
        int i;

        if (!test_bit(__I40E_MDD_EVENT_PENDING, pf->state))
                return;

        /* find what triggered the MDD event */
        reg = rd32(hw, I40E_GL_MDET_TX);
        if (reg & I40E_GL_MDET_TX_VALID_MASK) {
                u8 pf_num = (reg & I40E_GL_MDET_TX_PF_NUM_MASK) >>
                                I40E_GL_MDET_TX_PF_NUM_SHIFT;
                u16 vf_num = (reg & I40E_GL_MDET_TX_VF_NUM_MASK) >>
                                I40E_GL_MDET_TX_VF_NUM_SHIFT;
                u8 event = (reg & I40E_GL_MDET_TX_EVENT_MASK) >>
                                I40E_GL_MDET_TX_EVENT_SHIFT;
                u16 queue = ((reg & I40E_GL_MDET_TX_QUEUE_MASK) >>
                                I40E_GL_MDET_TX_QUEUE_SHIFT) -
                                pf->hw.func_caps.base_queue;
                if (netif_msg_tx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on TX queue %d PF number 0x%02x VF number 0x%02x\n",
                                 event, queue, pf_num, vf_num);
                wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
                mdd_detected = true;
        }
        reg = rd32(hw, I40E_GL_MDET_RX);
        if (reg & I40E_GL_MDET_RX_VALID_MASK) {
                u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK) >>
                                I40E_GL_MDET_RX_FUNCTION_SHIFT;
                u8 event = (reg & I40E_GL_MDET_RX_EVENT_MASK) >>
                                I40E_GL_MDET_RX_EVENT_SHIFT;
                u16 queue = ((reg & I40E_GL_MDET_RX_QUEUE_MASK) >>
                                I40E_GL_MDET_RX_QUEUE_SHIFT) -
                                pf->hw.func_caps.base_queue;
                if (netif_msg_rx_err(pf))
                        dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
                                 event, queue, func);
                wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
                mdd_detected = true;
        }

        if (mdd_detected) {
                reg = rd32(hw, I40E_PF_MDET_TX);
                if (reg & I40E_PF_MDET_TX_VALID_MASK) {
                        wr32(hw, I40E_PF_MDET_TX, 0xFFFF);
                        dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");
                        pf_mdd_detected = true;
                }
                reg = rd32(hw, I40E_PF_MDET_RX);
                if (reg & I40E_PF_MDET_RX_VALID_MASK) {
                        wr32(hw, I40E_PF_MDET_RX, 0xFFFF);
                        dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n");
                        pf_mdd_detected = true;
                }
                /* Queue belongs to the PF, initiate a reset */
                if (pf_mdd_detected) {
                        set_bit(__I40E_PF_RESET_REQUESTED, pf->state);
                        i40e_service_event_schedule(pf);
                }
        }

        /* see if one of the VFs needs its hand slapped */
        for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
                vf = &(pf->vf[i]);
                reg = rd32(hw, I40E_VP_MDET_TX(i));
                if (reg & I40E_VP_MDET_TX_VALID_MASK) {
                        wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
                                 i);
                }

                reg = rd32(hw, I40E_VP_MDET_RX(i));
                if (reg & I40E_VP_MDET_RX_VALID_MASK) {
                        wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
                        vf->num_mdd_events++;
                        dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
                                 i);
                }

                if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
                        dev_info(&pf->pdev->dev,
                                 "Too many MDD events on VF %d, disabled\n", i);
                        dev_info(&pf->pdev->dev,
                                 "Use PF Control I/F to re-enable the VF\n");
                        set_bit(I40E_VF_STATE_DISABLED, &vf->vf_states);
                }
        }

        /* re-enable mdd interrupt cause */
        clear_bit(__I40E_MDD_EVENT_PENDING, pf->state);
        reg = rd32(hw, I40E_PFINT_ICR0_ENA);
        reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
        wr32(hw, I40E_PFINT_ICR0_ENA, reg);
        i40e_flush(hw);
}

static const char *i40e_tunnel_name(struct i40e_udp_port_config *port)
{
        switch (port->type) {
        case UDP_TUNNEL_TYPE_VXLAN:
                return "vxlan";
        case UDP_TUNNEL_TYPE_GENEVE:
                return "geneve";
        default:
                return "unknown";
        }
}

/**
 * i40e_sync_udp_filters - Trigger a sync event for existing UDP filters
 * @pf: board private structure
 **/
static void i40e_sync_udp_filters(struct i40e_pf *pf)
{
        int i;

        /* loop through and set pending bit for all active UDP filters */
        for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
                if (pf->udp_ports[i].port)
                        pf->pending_udp_bitmap |= BIT_ULL(i);
        }

        pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
}

/**
 * i40e_sync_udp_filters_subtask - Sync the VSI filter list with HW
 * @pf: board private structure
 **/
static void i40e_sync_udp_filters_subtask(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret;
        u16 port;
        int i;

        if (!(pf->flags & I40E_FLAG_UDP_FILTER_SYNC))
                return;

        pf->flags &= ~I40E_FLAG_UDP_FILTER_SYNC;

        for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
                if (pf->pending_udp_bitmap & BIT_ULL(i)) {
                        pf->pending_udp_bitmap &= ~BIT_ULL(i);
                        port = pf->udp_ports[i].port;
                        if (port)
                                ret = i40e_aq_add_udp_tunnel(hw, port,
                                                        pf->udp_ports[i].type,
                                                        NULL, NULL);
                        else
                                ret = i40e_aq_del_udp_tunnel(hw, i, NULL);

                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "%s %s port %d, index %d failed, err %s aq_err %s\n",
                                         i40e_tunnel_name(&pf->udp_ports[i]),
                                         port ? "add" : "delete",
                                         port, i,
                                         i40e_stat_str(&pf->hw, ret),
                                         i40e_aq_str(&pf->hw,
                                                     pf->hw.aq.asq_last_status));
                                pf->udp_ports[i].port = 0;
                        }
                }
        }
}

/**
 * i40e_service_task - Run the driver's async subtasks
 * @work: pointer to work_struct containing our data
 **/
static void i40e_service_task(struct work_struct *work)
{
        struct i40e_pf *pf = container_of(work,
                                          struct i40e_pf,
                                          service_task);
        unsigned long start_time = jiffies;

        /* don't bother with service tasks if a reset is in progress */
        if (test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state))
                return;

        if (test_and_set_bit(__I40E_SERVICE_SCHED, pf->state))
                return;

        i40e_detect_recover_hung(pf);
        i40e_sync_filters_subtask(pf);
        i40e_reset_subtask(pf);
        i40e_handle_mdd_event(pf);
        i40e_vc_process_vflr_event(pf);
        i40e_watchdog_subtask(pf);
        i40e_fdir_reinit_subtask(pf);
        if (pf->flags & I40E_FLAG_CLIENT_RESET) {
                /* Client subtask will reopen next time through. */
                i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], true);
                pf->flags &= ~I40E_FLAG_CLIENT_RESET;
        } else {
                i40e_client_subtask(pf);
                if (pf->flags & I40E_FLAG_CLIENT_L2_CHANGE) {
                        i40e_notify_client_of_l2_param_changes(
                                                        pf->vsi[pf->lan_vsi]);
                        pf->flags &= ~I40E_FLAG_CLIENT_L2_CHANGE;
                }
        }
        i40e_sync_filters_subtask(pf);
        i40e_sync_udp_filters_subtask(pf);
        i40e_clean_adminq_subtask(pf);

        /* flush memory to make sure state is correct before next watchdog */
        smp_mb__before_atomic();
        clear_bit(__I40E_SERVICE_SCHED, pf->state);

        /* If the tasks have taken longer than one timer cycle or there
         * is more work to be done, reschedule the service task now
         * rather than wait for the timer to tick again.
         */
        if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
            test_bit(__I40E_ADMINQ_EVENT_PENDING, pf->state)             ||
            test_bit(__I40E_MDD_EVENT_PENDING, pf->state)                ||
            test_bit(__I40E_VFLR_EVENT_PENDING, pf->state))
                i40e_service_event_schedule(pf);
}

/**
 * i40e_service_timer - timer callback
 * @data: pointer to PF struct
 **/
static void i40e_service_timer(unsigned long data)
{
        struct i40e_pf *pf = (struct i40e_pf *)data;

        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));
        i40e_service_event_schedule(pf);
}

/**
 * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
 * @vsi: the VSI being configured
 **/
static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;

        switch (vsi->type) {
        case I40E_VSI_MAIN:
                vsi->alloc_queue_pairs = pf->num_lan_qps;
                vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                      I40E_REQ_DESCRIPTOR_MULTIPLE);
                if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                        vsi->num_q_vectors = pf->num_lan_msix;
                else
                        vsi->num_q_vectors = 1;

                break;

        case I40E_VSI_FDIR:
                vsi->alloc_queue_pairs = 1;
                vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
                                      I40E_REQ_DESCRIPTOR_MULTIPLE);
                vsi->num_q_vectors = pf->num_fdsb_msix;
                break;

        case I40E_VSI_VMDQ2:
                vsi->alloc_queue_pairs = pf->num_vmdq_qps;
                vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                      I40E_REQ_DESCRIPTOR_MULTIPLE);
                vsi->num_q_vectors = pf->num_vmdq_msix;
                break;

        case I40E_VSI_SRIOV:
                vsi->alloc_queue_pairs = pf->num_vf_qps;
                vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
                                      I40E_REQ_DESCRIPTOR_MULTIPLE);
                break;

        default:
                WARN_ON(1);
                return -ENODATA;
        }

        return 0;
}

/**
 * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
 * @type: VSI pointer
 * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
 *
 * On error: returns error code (negative)
 * On success: returns 0
 **/
static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
{
        struct i40e_ring **next_rings;
        int size;
        int ret = 0;

        /* allocate memory for both Tx, XDP Tx and Rx ring pointers */
        size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs *
               (i40e_enabled_xdp_vsi(vsi) ? 3 : 2);
        vsi->tx_rings = kzalloc(size, GFP_KERNEL);
        if (!vsi->tx_rings)
                return -ENOMEM;
        next_rings = vsi->tx_rings + vsi->alloc_queue_pairs;
        if (i40e_enabled_xdp_vsi(vsi)) {
                vsi->xdp_rings = next_rings;
                next_rings += vsi->alloc_queue_pairs;
        }
        vsi->rx_rings = next_rings;

        if (alloc_qvectors) {
                /* allocate memory for q_vector pointers */
                size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
                vsi->q_vectors = kzalloc(size, GFP_KERNEL);
                if (!vsi->q_vectors) {
                        ret = -ENOMEM;
                        goto err_vectors;
                }
        }
        return ret;

err_vectors:
        kfree(vsi->tx_rings);
        return ret;
}

/**
 * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
 * @pf: board private structure
 * @type: type of VSI
 *
 * On error: returns error code (negative)
 * On success: returns vsi index in PF (positive)
 **/
static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
{
        int ret = -ENODEV;
        struct i40e_vsi *vsi;
        int vsi_idx;
        int i;

        /* Need to protect the allocation of the VSIs at the PF level */
        mutex_lock(&pf->switch_mutex);

        /* VSI list may be fragmented if VSI creation/destruction has
         * been happening.  We can afford to do a quick scan to look
         * for any free VSIs in the list.
         *
         * find next empty vsi slot, looping back around if necessary
         */
        i = pf->next_vsi;
        while (i < pf->num_alloc_vsi && pf->vsi[i])
                i++;
        if (i >= pf->num_alloc_vsi) {
                i = 0;
                while (i < pf->next_vsi && pf->vsi[i])
                        i++;
        }

        if (i < pf->num_alloc_vsi && !pf->vsi[i]) {
                vsi_idx = i;             /* Found one! */
        } else {
                ret = -ENODEV;
                goto unlock_pf;  /* out of VSI slots! */
        }
        pf->next_vsi = ++i;

        vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
        if (!vsi) {
                ret = -ENOMEM;
                goto unlock_pf;
        }
        vsi->type = type;
        vsi->back = pf;
        set_bit(__I40E_VSI_DOWN, vsi->state);
        vsi->flags = 0;
        vsi->idx = vsi_idx;
        vsi->int_rate_limit = 0;
        vsi->rss_table_size = (vsi->type == I40E_VSI_MAIN) ?
                                pf->rss_table_size : 64;
        vsi->netdev_registered = false;
        vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
        hash_init(vsi->mac_filter_hash);
        vsi->irqs_ready = false;

        ret = i40e_set_num_rings_in_vsi(vsi);
        if (ret)
                goto err_rings;

        ret = i40e_vsi_alloc_arrays(vsi, true);
        if (ret)
                goto err_rings;

        /* Setup default MSIX irq handler for VSI */
        i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);

        /* Initialize VSI lock */
        spin_lock_init(&vsi->mac_filter_hash_lock);
        pf->vsi[vsi_idx] = vsi;
        ret = vsi_idx;
        goto unlock_pf;

err_rings:
        pf->next_vsi = i - 1;
        kfree(vsi);
unlock_pf:
        mutex_unlock(&pf->switch_mutex);
        return ret;
}

/**
 * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
 * @type: VSI pointer
 * @free_qvectors: a bool to specify if q_vectors need to be freed.
 *
 * On error: returns error code (negative)
 * On success: returns 0
 **/
static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
{
        /* free the ring and vector containers */
        if (free_qvectors) {
                kfree(vsi->q_vectors);
                vsi->q_vectors = NULL;
        }
        kfree(vsi->tx_rings);
        vsi->tx_rings = NULL;
        vsi->rx_rings = NULL;
        vsi->xdp_rings = NULL;
}

/**
 * i40e_clear_rss_config_user - clear the user configured RSS hash keys
 * and lookup table
 * @vsi: Pointer to VSI structure
 */
static void i40e_clear_rss_config_user(struct i40e_vsi *vsi)
{
        if (!vsi)
                return;

        kfree(vsi->rss_hkey_user);
        vsi->rss_hkey_user = NULL;

        kfree(vsi->rss_lut_user);
        vsi->rss_lut_user = NULL;
}

/**
 * i40e_vsi_clear - Deallocate the VSI provided
 * @vsi: the VSI being un-configured
 **/
static int i40e_vsi_clear(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf;

        if (!vsi)
                return 0;

        if (!vsi->back)
                goto free_vsi;
        pf = vsi->back;

        mutex_lock(&pf->switch_mutex);
        if (!pf->vsi[vsi->idx]) {
                dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
                        vsi->idx, vsi->idx, vsi, vsi->type);
                goto unlock_vsi;
        }

        if (pf->vsi[vsi->idx] != vsi) {
                dev_err(&pf->pdev->dev,
                        "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
                        pf->vsi[vsi->idx]->idx,
                        pf->vsi[vsi->idx],
                        pf->vsi[vsi->idx]->type,
                        vsi->idx, vsi, vsi->type);
                goto unlock_vsi;
        }

        /* updates the PF for this cleared vsi */
        i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
        i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);

        i40e_vsi_free_arrays(vsi, true);
        i40e_clear_rss_config_user(vsi);

        pf->vsi[vsi->idx] = NULL;
        if (vsi->idx < pf->next_vsi)
                pf->next_vsi = vsi->idx;

unlock_vsi:
        mutex_unlock(&pf->switch_mutex);
free_vsi:
        kfree(vsi);

        return 0;
}

/**
 * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
 * @vsi: the VSI being cleaned
 **/
static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
{
        int i;

        if (vsi->tx_rings && vsi->tx_rings[0]) {
                for (i = 0; i < vsi->alloc_queue_pairs; i++) {
                        kfree_rcu(vsi->tx_rings[i], rcu);
                        vsi->tx_rings[i] = NULL;
                        vsi->rx_rings[i] = NULL;
                        if (vsi->xdp_rings)
                                vsi->xdp_rings[i] = NULL;
                }
        }
}

/**
 * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
 * @vsi: the VSI being configured
 **/
static int i40e_alloc_rings(struct i40e_vsi *vsi)
{
        int i, qpv = i40e_enabled_xdp_vsi(vsi) ? 3 : 2;
        struct i40e_pf *pf = vsi->back;
        struct i40e_ring *ring;

        /* Set basic values in the rings to be used later during open() */
        for (i = 0; i < vsi->alloc_queue_pairs; i++) {
                /* allocate space for both Tx and Rx in one shot */
                ring = kcalloc(qpv, sizeof(struct i40e_ring), GFP_KERNEL);
                if (!ring)
                        goto err_out;

                ring->queue_index = i;
                ring->reg_idx = vsi->base_queue + i;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = vsi->netdev;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                if (vsi->back->hw_features & I40E_HW_WB_ON_ITR_CAPABLE)
                        ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
                ring->tx_itr_setting = pf->tx_itr_default;
                vsi->tx_rings[i] = ring++;

                if (!i40e_enabled_xdp_vsi(vsi))
                        goto setup_rx;

                ring->queue_index = vsi->alloc_queue_pairs + i;
                ring->reg_idx = vsi->base_queue + ring->queue_index;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = NULL;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                if (vsi->back->hw_features & I40E_HW_WB_ON_ITR_CAPABLE)
                        ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
                set_ring_xdp(ring);
                ring->tx_itr_setting = pf->tx_itr_default;
                vsi->xdp_rings[i] = ring++;

setup_rx:
                ring->queue_index = i;
                ring->reg_idx = vsi->base_queue + i;
                ring->ring_active = false;
                ring->vsi = vsi;
                ring->netdev = vsi->netdev;
                ring->dev = &pf->pdev->dev;
                ring->count = vsi->num_desc;
                ring->size = 0;
                ring->dcb_tc = 0;
                ring->rx_itr_setting = pf->rx_itr_default;
                vsi->rx_rings[i] = ring;
        }

        return 0;

err_out:
        i40e_vsi_clear_rings(vsi);
        return -ENOMEM;
}

/**
 * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
 * @pf: board private structure
 * @vectors: the number of MSI-X vectors to request
 *
 * Returns the number of vectors reserved, or error
 **/
static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
{
        vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
                                        I40E_MIN_MSIX, vectors);
        if (vectors < 0) {
                dev_info(&pf->pdev->dev,
                         "MSI-X vector reservation failed: %d\n", vectors);
                vectors = 0;
        }

        return vectors;
}

/**
 * i40e_init_msix - Setup the MSIX capability
 * @pf: board private structure
 *
 * Work with the OS to set up the MSIX vectors needed.
 *
 * Returns the number of vectors reserved or negative on failure
 **/
static int i40e_init_msix(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int cpus, extra_vectors;
        int vectors_left;
        int v_budget, i;
        int v_actual;
        int iwarp_requested = 0;

        if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
                return -ENODEV;

        /* The number of vectors we'll request will be comprised of:
         *   - Add 1 for "other" cause for Admin Queue events, etc.
         *   - The number of LAN queue pairs
         *      - Queues being used for RSS.
         *              We don't need as many as max_rss_size vectors.
         *              use rss_size instead in the calculation since that
         *              is governed by number of cpus in the system.
         *      - assumes symmetric Tx/Rx pairing
         *   - The number of VMDq pairs
         *   - The CPU count within the NUMA node if iWARP is enabled
         * Once we count this up, try the request.
         *
         * If we can't get what we want, we'll simplify to nearly nothing
         * and try again.  If that still fails, we punt.
         */
        vectors_left = hw->func_caps.num_msix_vectors;
        v_budget = 0;

        /* reserve one vector for miscellaneous handler */
        if (vectors_left) {
                v_budget++;
                vectors_left--;
        }

        /* reserve some vectors for the main PF traffic queues. Initially we
         * only reserve at most 50% of the available vectors, in the case that
         * the number of online CPUs is large. This ensures that we can enable
         * extra features as well. Once we've enabled the other features, we
         * will use any remaining vectors to reach as close as we can to the
         * number of online CPUs.
         */
        cpus = num_online_cpus();
        pf->num_lan_msix = min_t(int, cpus, vectors_left / 2);
        vectors_left -= pf->num_lan_msix;

        /* reserve one vector for sideband flow director */
        if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
                if (vectors_left) {
                        pf->num_fdsb_msix = 1;
                        v_budget++;
                        vectors_left--;
                } else {
                        pf->num_fdsb_msix = 0;
                }
        }

        /* can we reserve enough for iWARP? */
        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                iwarp_requested = pf->num_iwarp_msix;

                if (!vectors_left)
                        pf->num_iwarp_msix = 0;
                else if (vectors_left < pf->num_iwarp_msix)
                        pf->num_iwarp_msix = 1;
                v_budget += pf->num_iwarp_msix;
                vectors_left -= pf->num_iwarp_msix;
        }

        /* any vectors left over go for VMDq support */
        if (pf->flags & I40E_FLAG_VMDQ_ENABLED) {
                int vmdq_vecs_wanted = pf->num_vmdq_vsis * pf->num_vmdq_qps;
                int vmdq_vecs = min_t(int, vectors_left, vmdq_vecs_wanted);

                if (!vectors_left) {
                        pf->num_vmdq_msix = 0;
                        pf->num_vmdq_qps = 0;
                } else {
                        /* if we're short on vectors for what's desired, we limit
                         * the queues per vmdq.  If this is still more than are
                         * available, the user will need to change the number of
                         * queues/vectors used by the PF later with the ethtool
                         * channels command
                         */
                        if (vmdq_vecs < vmdq_vecs_wanted)
                                pf->num_vmdq_qps = 1;
                        pf->num_vmdq_msix = pf->num_vmdq_qps;

                        v_budget += vmdq_vecs;
                        vectors_left -= vmdq_vecs;
                }
        }

        /* On systems with a large number of SMP cores, we previously limited
         * the number of vectors for num_lan_msix to be at most 50% of the
         * available vectors, to allow for other features. Now, we add back
         * the remaining vectors. However, we ensure that the total
         * num_lan_msix will not exceed num_online_cpus(). To do this, we
         * calculate the number of vectors we can add without going over the
         * cap of CPUs. For systems with a small number of CPUs this will be
         * zero.
         */
        extra_vectors = min_t(int, cpus - pf->num_lan_msix, vectors_left);
        pf->num_lan_msix += extra_vectors;
        vectors_left -= extra_vectors;

        WARN(vectors_left < 0,
             "Calculation of remaining vectors underflowed. This is an accounting bug when determining total MSI-X vectors.\n");

        v_budget += pf->num_lan_msix;
        pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
                                   GFP_KERNEL);
        if (!pf->msix_entries)
                return -ENOMEM;

        for (i = 0; i < v_budget; i++)
                pf->msix_entries[i].entry = i;
        v_actual = i40e_reserve_msix_vectors(pf, v_budget);

        if (v_actual < I40E_MIN_MSIX) {
                pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
                kfree(pf->msix_entries);
                pf->msix_entries = NULL;
                pci_disable_msix(pf->pdev);
                return -ENODEV;

        } else if (v_actual == I40E_MIN_MSIX) {
                /* Adjust for minimal MSIX use */
                pf->num_vmdq_vsis = 0;
                pf->num_vmdq_qps = 0;
                pf->num_lan_qps = 1;
                pf->num_lan_msix = 1;

        } else if (!vectors_left) {
                /* If we have limited resources, we will start with no vectors
                 * for the special features and then allocate vectors to some
                 * of these features based on the policy and at the end disable
                 * the features that did not get any vectors.
                 */
                int vec;

                dev_info(&pf->pdev->dev,
                         "MSI-X vector limit reached, attempting to redistribute vectors\n");
                /* reserve the misc vector */
                vec = v_actual - 1;

                /* Scale vector usage down */
                pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
                pf->num_vmdq_vsis = 1;
                pf->num_vmdq_qps = 1;

                /* partition out the remaining vectors */
                switch (vec) {
                case 2:
                        pf->num_lan_msix = 1;
                        break;
                case 3:
                        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                                pf->num_lan_msix = 1;
                                pf->num_iwarp_msix = 1;
                        } else {
                                pf->num_lan_msix = 2;
                        }
                        break;
                default:
                        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                                pf->num_iwarp_msix = min_t(int, (vec / 3),
                                                 iwarp_requested);
                                pf->num_vmdq_vsis = min_t(int, (vec / 3),
                                                  I40E_DEFAULT_NUM_VMDQ_VSI);
                        } else {
                                pf->num_vmdq_vsis = min_t(int, (vec / 2),
                                                  I40E_DEFAULT_NUM_VMDQ_VSI);
                        }
                        if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
                                pf->num_fdsb_msix = 1;
                                vec--;
                        }
                        pf->num_lan_msix = min_t(int,
                               (vec - (pf->num_iwarp_msix + pf->num_vmdq_vsis)),
                                                              pf->num_lan_msix);
                        pf->num_lan_qps = pf->num_lan_msix;
                        break;
                }
        }

        if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
            (pf->num_fdsb_msix == 0)) {
                dev_info(&pf->pdev->dev, "Sideband Flowdir disabled, not enough MSI-X vectors\n");
                pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
        }
        if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
            (pf->num_vmdq_msix == 0)) {
                dev_info(&pf->pdev->dev, "VMDq disabled, not enough MSI-X vectors\n");
                pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
        }

        if ((pf->flags & I40E_FLAG_IWARP_ENABLED) &&
            (pf->num_iwarp_msix == 0)) {
                dev_info(&pf->pdev->dev, "IWARP disabled, not enough MSI-X vectors\n");
                pf->flags &= ~I40E_FLAG_IWARP_ENABLED;
        }
        i40e_debug(&pf->hw, I40E_DEBUG_INIT,
                   "MSI-X vector distribution: PF %d, VMDq %d, FDSB %d, iWARP %d\n",
                   pf->num_lan_msix,
                   pf->num_vmdq_msix * pf->num_vmdq_vsis,
                   pf->num_fdsb_msix,
                   pf->num_iwarp_msix);

        return v_actual;
}

/**
 * i40e_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
 * @vsi: the VSI being configured
 * @v_idx: index of the vector in the vsi struct
 * @cpu: cpu to be used on affinity_mask
 *
 * We allocate one q_vector.  If allocation fails we return -ENOMEM.
 **/
static int i40e_vsi_alloc_q_vector(struct i40e_vsi *vsi, int v_idx, int cpu)
{
        struct i40e_q_vector *q_vector;

        /* allocate q_vector */
        q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
        if (!q_vector)
                return -ENOMEM;

        q_vector->vsi = vsi;
        q_vector->v_idx = v_idx;
        cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask);

        if (vsi->netdev)
                netif_napi_add(vsi->netdev, &q_vector->napi,
                               i40e_napi_poll, NAPI_POLL_WEIGHT);

        q_vector->rx.latency_range = I40E_LOW_LATENCY;
        q_vector->tx.latency_range = I40E_LOW_LATENCY;

        /* tie q_vector and vsi together */
        vsi->q_vectors[v_idx] = q_vector;

        return 0;
}

/**
 * i40e_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
 * @vsi: the VSI being configured
 *
 * We allocate one q_vector per queue interrupt.  If allocation fails we
 * return -ENOMEM.
 **/
static int i40e_vsi_alloc_q_vectors(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        int err, v_idx, num_q_vectors, current_cpu;

        /* if not MSIX, give the one vector only to the LAN VSI */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED)
                num_q_vectors = vsi->num_q_vectors;
        else if (vsi == pf->vsi[pf->lan_vsi])
                num_q_vectors = 1;
        else
                return -EINVAL;

        current_cpu = cpumask_first(cpu_online_mask);

        for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
                err = i40e_vsi_alloc_q_vector(vsi, v_idx, current_cpu);
                if (err)
                        goto err_out;
                current_cpu = cpumask_next(current_cpu, cpu_online_mask);
                if (unlikely(current_cpu >= nr_cpu_ids))
                        current_cpu = cpumask_first(cpu_online_mask);
        }

        return 0;

err_out:
        while (v_idx--)
                i40e_free_q_vector(vsi, v_idx);

        return err;
}

/**
 * i40e_init_interrupt_scheme - Determine proper interrupt scheme
 * @pf: board private structure to initialize
 **/
static int i40e_init_interrupt_scheme(struct i40e_pf *pf)
{
        int vectors = 0;
        ssize_t size;

        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                vectors = i40e_init_msix(pf);
                if (vectors < 0) {
                        pf->flags &= ~(I40E_FLAG_MSIX_ENABLED   |
                                       I40E_FLAG_IWARP_ENABLED  |
                                       I40E_FLAG_RSS_ENABLED    |
                                       I40E_FLAG_DCB_CAPABLE    |
                                       I40E_FLAG_DCB_ENABLED    |
                                       I40E_FLAG_SRIOV_ENABLED  |
                                       I40E_FLAG_FD_SB_ENABLED  |
                                       I40E_FLAG_FD_ATR_ENABLED |
                                       I40E_FLAG_VMDQ_ENABLED);

                        /* rework the queue expectations without MSIX */
                        i40e_determine_queue_usage(pf);
                }
        }

        if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
            (pf->flags & I40E_FLAG_MSI_ENABLED)) {
                dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
                vectors = pci_enable_msi(pf->pdev);
                if (vectors < 0) {
                        dev_info(&pf->pdev->dev, "MSI init failed - %d\n",
                                 vectors);
                        pf->flags &= ~I40E_FLAG_MSI_ENABLED;
                }
                vectors = 1;  /* one MSI or Legacy vector */
        }

        if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
                dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");

        /* set up vector assignment tracking */
        size = sizeof(struct i40e_lump_tracking) + (sizeof(u16) * vectors);
        pf->irq_pile = kzalloc(size, GFP_KERNEL);
        if (!pf->irq_pile) {
                dev_err(&pf->pdev->dev, "error allocating irq_pile memory\n");
                return -ENOMEM;
        }
        pf->irq_pile->num_entries = vectors;
        pf->irq_pile->search_hint = 0;

        /* track first vector for misc interrupts, ignore return */
        (void)i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT - 1);

        return 0;
}

/**
 * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
 * @pf: board private structure
 *
 * This sets up the handler for MSIX 0, which is used to manage the
 * non-queue interrupts, e.g. AdminQ and errors.  This is not used
 * when in MSI or Legacy interrupt mode.
 **/
static int i40e_setup_misc_vector(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        int err = 0;

        /* Only request the irq if this is the first time through, and
         * not when we're rebuilding after a Reset
         */
        if (!test_bit(__I40E_RESET_RECOVERY_PENDING, pf->state)) {
                err = request_irq(pf->msix_entries[0].vector,
                                  i40e_intr, 0, pf->int_name, pf);
                if (err) {
                        dev_info(&pf->pdev->dev,
                                 "request_irq for %s failed: %d\n",
                                 pf->int_name, err);
                        return -EFAULT;
                }
        }

        i40e_enable_misc_int_causes(pf);

        /* associate no queues to the misc vector */
        wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
        wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);

        i40e_flush(hw);

        i40e_irq_dynamic_enable_icr0(pf, true);

        return err;
}

/**
 * i40e_config_rss_aq - Prepare for RSS using AQ commands
 * @vsi: vsi structure
 * @seed: RSS hash seed
 **/
static int i40e_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
                              u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int ret = 0;

        if (seed) {
                struct i40e_aqc_get_set_rss_key_data *seed_dw =
                        (struct i40e_aqc_get_set_rss_key_data *)seed;
                ret = i40e_aq_set_rss_key(hw, vsi->id, seed_dw);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot set RSS key, err %s aq_err %s\n",
                                 i40e_stat_str(hw, ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                        return ret;
                }
        }
        if (lut) {
                bool pf_lut = vsi->type == I40E_VSI_MAIN ? true : false;

                ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot set RSS lut, err %s aq_err %s\n",
                                 i40e_stat_str(hw, ret),
                                 i40e_aq_str(hw, hw->aq.asq_last_status));
                        return ret;
                }
        }
        return ret;
}

/**
 * i40e_get_rss_aq - Get RSS keys and lut by using AQ commands
 * @vsi: Pointer to vsi structure
 * @seed: Buffter to store the hash keys
 * @lut: Buffer to store the lookup table entries
 * @lut_size: Size of buffer to store the lookup table entries
 *
 * Return 0 on success, negative on failure
 */
static int i40e_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
                           u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        int ret = 0;

        if (seed) {
                ret = i40e_aq_get_rss_key(hw, vsi->id,
                        (struct i40e_aqc_get_set_rss_key_data *)seed);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot get RSS key, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return ret;
                }
        }

        if (lut) {
                bool pf_lut = vsi->type == I40E_VSI_MAIN ? true : false;

                ret = i40e_aq_get_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "Cannot get RSS lut, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return ret;
                }
        }

        return ret;
}

/**
 * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
 * @vsi: VSI structure
 **/
static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
{
        u8 seed[I40E_HKEY_ARRAY_SIZE];
        struct i40e_pf *pf = vsi->back;
        u8 *lut;
        int ret;

        if (!(pf->hw_features & I40E_HW_RSS_AQ_CAPABLE))
                return 0;

        if (!vsi->rss_size)
                vsi->rss_size = min_t(int, pf->alloc_rss_size,
                                      vsi->num_queue_pairs);
        if (!vsi->rss_size)
                return -EINVAL;

        lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
        if (!lut)
                return -ENOMEM;
        /* Use the user configured hash keys and lookup table if there is one,
         * otherwise use default
         */
        if (vsi->rss_lut_user)
                memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
        else
                i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
        if (vsi->rss_hkey_user)
                memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
        else
                netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
        ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
        kfree(lut);

        return ret;
}

/**
 * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
 * @vsi: Pointer to vsi structure
 * @seed: RSS hash seed
 * @lut: Lookup table
 * @lut_size: Lookup table size
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
                               const u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vf_id = vsi->vf_id;
        u8 i;

        /* Fill out hash function seed */
        if (seed) {
                u32 *seed_dw = (u32 *)seed;

                if (vsi->type == I40E_VSI_MAIN) {
                        for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
                                wr32(hw, I40E_PFQF_HKEY(i), seed_dw[i]);
                } else if (vsi->type == I40E_VSI_SRIOV) {
                        for (i = 0; i <= I40E_VFQF_HKEY1_MAX_INDEX; i++)
                                wr32(hw, I40E_VFQF_HKEY1(i, vf_id), seed_dw[i]);
                } else {
                        dev_err(&pf->pdev->dev, "Cannot set RSS seed - invalid VSI type\n");
                }
        }

        if (lut) {
                u32 *lut_dw = (u32 *)lut;

                if (vsi->type == I40E_VSI_MAIN) {
                        if (lut_size != I40E_HLUT_ARRAY_SIZE)
                                return -EINVAL;
                        for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                                wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
                } else if (vsi->type == I40E_VSI_SRIOV) {
                        if (lut_size != I40E_VF_HLUT_ARRAY_SIZE)
                                return -EINVAL;
                        for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
                                wr32(hw, I40E_VFQF_HLUT1(i, vf_id), lut_dw[i]);
                } else {
                        dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
                }
        }
        i40e_flush(hw);

        return 0;
}

/**
 * i40e_get_rss_reg - Get the RSS keys and lut by reading registers
 * @vsi: Pointer to VSI structure
 * @seed: Buffer to store the keys
 * @lut: Buffer to store the lookup table entries
 * @lut_size: Size of buffer to store the lookup table entries
 *
 * Returns 0 on success, negative on failure
 */
static int i40e_get_rss_reg(struct i40e_vsi *vsi, u8 *seed,
                            u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 i;

        if (seed) {
                u32 *seed_dw = (u32 *)seed;

                for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
                        seed_dw[i] = i40e_read_rx_ctl(hw, I40E_PFQF_HKEY(i));
        }
        if (lut) {
                u32 *lut_dw = (u32 *)lut;

                if (lut_size != I40E_HLUT_ARRAY_SIZE)
                        return -EINVAL;
                for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                        lut_dw[i] = rd32(hw, I40E_PFQF_HLUT(i));
        }

        return 0;
}

/**
 * i40e_config_rss - Configure RSS keys and lut
 * @vsi: Pointer to VSI structure
 * @seed: RSS hash seed
 * @lut: Lookup table
 * @lut_size: Lookup table size
 *
 * Returns 0 on success, negative on failure
 */
int i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;

        if (pf->hw_features & I40E_HW_RSS_AQ_CAPABLE)
                return i40e_config_rss_aq(vsi, seed, lut, lut_size);
        else
                return i40e_config_rss_reg(vsi, seed, lut, lut_size);
}

/**
 * i40e_get_rss - Get RSS keys and lut
 * @vsi: Pointer to VSI structure
 * @seed: Buffer to store the keys
 * @lut: Buffer to store the lookup table entries
 * lut_size: Size of buffer to store the lookup table entries
 *
 * Returns 0 on success, negative on failure
 */
int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
{
        struct i40e_pf *pf = vsi->back;

        if (pf->hw_features & I40E_HW_RSS_AQ_CAPABLE)
                return i40e_get_rss_aq(vsi, seed, lut, lut_size);
        else
                return i40e_get_rss_reg(vsi, seed, lut, lut_size);
}

/**
 * i40e_fill_rss_lut - Fill the RSS lookup table with default values
 * @pf: Pointer to board private structure
 * @lut: Lookup table
 * @rss_table_size: Lookup table size
 * @rss_size: Range of queue number for hashing
 */
void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
                       u16 rss_table_size, u16 rss_size)
{
        u16 i;

        for (i = 0; i < rss_table_size; i++)
                lut[i] = i % rss_size;
}

/**
 * i40e_pf_config_rss - Prepare for RSS if used
 * @pf: board private structure
 **/
static int i40e_pf_config_rss(struct i40e_pf *pf)
{
        struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
        u8 seed[I40E_HKEY_ARRAY_SIZE];
        u8 *lut;
        struct i40e_hw *hw = &pf->hw;
        u32 reg_val;
        u64 hena;
        int ret;

        /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
        hena = (u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(0)) |
                ((u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(1)) << 32);
        hena |= i40e_pf_get_default_rss_hena(pf);

        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), (u32)hena);
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));

        /* Determine the RSS table size based on the hardware capabilities */
        reg_val = i40e_read_rx_ctl(hw, I40E_PFQF_CTL_0);
        reg_val = (pf->rss_table_size == 512) ?
                        (reg_val | I40E_PFQF_CTL_0_HASHLUTSIZE_512) :
                        (reg_val & ~I40E_PFQF_CTL_0_HASHLUTSIZE_512);
        i40e_write_rx_ctl(hw, I40E_PFQF_CTL_0, reg_val);

        /* Determine the RSS size of the VSI */
        if (!vsi->rss_size) {
                u16 qcount;

                qcount = vsi->num_queue_pairs / vsi->tc_config.numtc;
                vsi->rss_size = min_t(int, pf->alloc_rss_size, qcount);
        }
        if (!vsi->rss_size)
                return -EINVAL;

        lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
        if (!lut)
                return -ENOMEM;

        /* Use user configured lut if there is one, otherwise use default */
        if (vsi->rss_lut_user)
                memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
        else
                i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);

        /* Use user configured hash key if there is one, otherwise
         * use default.
         */
        if (vsi->rss_hkey_user)
                memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
        else
                netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
        ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
        kfree(lut);

        return ret;
}

/**
 * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
 * @pf: board private structure
 * @queue_count: the requested queue count for rss.
 *
 * returns 0 if rss is not enabled, if enabled returns the final rss queue
 * count which may be different from the requested queue count.
 * Note: expects to be called while under rtnl_lock()
 **/
int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
{
        struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
        int new_rss_size;

        if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
                return 0;

        new_rss_size = min_t(int, queue_count, pf->rss_size_max);

        if (queue_count != vsi->num_queue_pairs) {
                u16 qcount;

                vsi->req_queue_pairs = queue_count;
                i40e_prep_for_reset(pf, true);

                pf->alloc_rss_size = new_rss_size;

                i40e_reset_and_rebuild(pf, true, true);

                /* Discard the user configured hash keys and lut, if less
                 * queues are enabled.
                 */
                if (queue_count < vsi->rss_size) {
                        i40e_clear_rss_config_user(vsi);
                        dev_dbg(&pf->pdev->dev,
                                "discard user configured hash keys and lut\n");
                }

                /* Reset vsi->rss_size, as number of enabled queues changed */
                qcount = vsi->num_queue_pairs / vsi->tc_config.numtc;
                vsi->rss_size = min_t(int, pf->alloc_rss_size, qcount);

                i40e_pf_config_rss(pf);
        }
        dev_info(&pf->pdev->dev, "User requested queue count/HW max RSS count:  %d/%d\n",
                 vsi->req_queue_pairs, pf->rss_size_max);
        return pf->alloc_rss_size;
}

/**
 * i40e_get_partition_bw_setting - Retrieve BW settings for this PF partition
 * @pf: board private structure
 **/
i40e_status i40e_get_partition_bw_setting(struct i40e_pf *pf)
{
        i40e_status status;
        bool min_valid, max_valid;
        u32 max_bw, min_bw;

        status = i40e_read_bw_from_alt_ram(&pf->hw, &max_bw, &min_bw,
                                           &min_valid, &max_valid);

        if (!status) {
                if (min_valid)
                        pf->min_bw = min_bw;
                if (max_valid)
                        pf->max_bw = max_bw;
        }

        return status;
}

/**
 * i40e_set_partition_bw_setting - Set BW settings for this PF partition
 * @pf: board private structure
 **/
i40e_status i40e_set_partition_bw_setting(struct i40e_pf *pf)
{
        struct i40e_aqc_configure_partition_bw_data bw_data;
        i40e_status status;

        /* Set the valid bit for this PF */
        bw_data.pf_valid_bits = cpu_to_le16(BIT(pf->hw.pf_id));
        bw_data.max_bw[pf->hw.pf_id] = pf->max_bw & I40E_ALT_BW_VALUE_MASK;
        bw_data.min_bw[pf->hw.pf_id] = pf->min_bw & I40E_ALT_BW_VALUE_MASK;

        /* Set the new bandwidths */
        status = i40e_aq_configure_partition_bw(&pf->hw, &bw_data, NULL);

        return status;
}

/**
 * i40e_commit_partition_bw_setting - Commit BW settings for this PF partition
 * @pf: board private structure
 **/
i40e_status i40e_commit_partition_bw_setting(struct i40e_pf *pf)
{
        /* Commit temporary BW setting to permanent NVM image */
        enum i40e_admin_queue_err last_aq_status;
        i40e_status ret;
        u16 nvm_word;

        if (pf->hw.partition_id != 1) {
                dev_info(&pf->pdev->dev,
                         "Commit BW only works on partition 1! This is partition %d",
                         pf->hw.partition_id);
                ret = I40E_NOT_SUPPORTED;
                goto bw_commit_out;
        }

        /* Acquire NVM for read access */
        ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_READ);
        last_aq_status = pf->hw.aq.asq_last_status;
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Cannot acquire NVM for read access, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }

        /* Read word 0x10 of NVM - SW compatibility word 1 */
        ret = i40e_aq_read_nvm(&pf->hw,
                               I40E_SR_NVM_CONTROL_WORD,
                               0x10, sizeof(nvm_word), &nvm_word,
                               false, NULL);
        /* Save off last admin queue command status before releasing
         * the NVM
         */
        last_aq_status = pf->hw.aq.asq_last_status;
        i40e_release_nvm(&pf->hw);
        if (ret) {
                dev_info(&pf->pdev->dev, "NVM read error, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }

        /* Wait a bit for NVM release to complete */
        msleep(50);

        /* Acquire NVM for write access */
        ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_WRITE);
        last_aq_status = pf->hw.aq.asq_last_status;
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "Cannot acquire NVM for write access, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
                goto bw_commit_out;
        }
        /* Write it back out unchanged to initiate update NVM,
         * which will force a write of the shadow (alt) RAM to
         * the NVM - thus storing the bandwidth values permanently.
         */
        ret = i40e_aq_update_nvm(&pf->hw,
                                 I40E_SR_NVM_CONTROL_WORD,
                                 0x10, sizeof(nvm_word),
                                 &nvm_word, true, NULL);
        /* Save off last admin queue command status before releasing
         * the NVM
         */
        last_aq_status = pf->hw.aq.asq_last_status;
        i40e_release_nvm(&pf->hw);
        if (ret)
                dev_info(&pf->pdev->dev,
                         "BW settings NOT SAVED, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, last_aq_status));
bw_commit_out:

        return ret;
}

/**
 * i40e_sw_init - Initialize general software structures (struct i40e_pf)
 * @pf: board private structure to initialize
 *
 * i40e_sw_init initializes the Adapter private data structure.
 * Fields are initialized based on PCI device information and
 * OS network device settings (MTU size).
 **/
static int i40e_sw_init(struct i40e_pf *pf)
{
        int err = 0;
        int size;

        /* Set default capability flags */
        pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
                    I40E_FLAG_MSI_ENABLED     |
                    I40E_FLAG_MSIX_ENABLED;

        /* Set default ITR */
        pf->rx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF;
        pf->tx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF;

        /* Depending on PF configurations, it is possible that the RSS
         * maximum might end up larger than the available queues
         */
        pf->rss_size_max = BIT(pf->hw.func_caps.rss_table_entry_width);
        pf->alloc_rss_size = 1;
        pf->rss_table_size = pf->hw.func_caps.rss_table_size;
        pf->rss_size_max = min_t(int, pf->rss_size_max,
                                 pf->hw.func_caps.num_tx_qp);
        if (pf->hw.func_caps.rss) {
                pf->flags |= I40E_FLAG_RSS_ENABLED;
                pf->alloc_rss_size = min_t(int, pf->rss_size_max,
                                           num_online_cpus());
        }

        /* MFP mode enabled */
        if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.flex10_enable) {
                pf->flags |= I40E_FLAG_MFP_ENABLED;
                dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
                if (i40e_get_partition_bw_setting(pf)) {
                        dev_warn(&pf->pdev->dev,
                                 "Could not get partition bw settings\n");
                } else {
                        dev_info(&pf->pdev->dev,
                                 "Partition BW Min = %8.8x, Max = %8.8x\n",
                                 pf->min_bw, pf->max_bw);

                        /* nudge the Tx scheduler */
                        i40e_set_partition_bw_setting(pf);
                }
        }

        if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
            (pf->hw.func_caps.fd_filters_best_effort > 0)) {
                pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
                pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
                if (pf->flags & I40E_FLAG_MFP_ENABLED &&
                    pf->hw.num_partitions > 1)
                        dev_info(&pf->pdev->dev,
                                 "Flow Director Sideband mode Disabled in MFP mode\n");
                else
                        pf->flags |= I40E_FLAG_FD_SB_ENABLED;
                pf->fdir_pf_filter_count =
                                 pf->hw.func_caps.fd_filters_guaranteed;
                pf->hw.fdir_shared_filter_count =
                                 pf->hw.func_caps.fd_filters_best_effort;
        }

        if (pf->hw.mac.type == I40E_MAC_X722) {
                pf->hw_features |= (I40E_HW_RSS_AQ_CAPABLE |
                                    I40E_HW_128_QP_RSS_CAPABLE |
                                    I40E_HW_ATR_EVICT_CAPABLE |
                                    I40E_HW_WB_ON_ITR_CAPABLE |
                                    I40E_HW_MULTIPLE_TCP_UDP_RSS_PCTYPE |
                                    I40E_HW_NO_PCI_LINK_CHECK |
                                    I40E_HW_USE_SET_LLDP_MIB |
                                    I40E_HW_GENEVE_OFFLOAD_CAPABLE |
                                    I40E_HW_PTP_L4_CAPABLE |
                                    I40E_HW_WOL_MC_MAGIC_PKT_WAKE |
                                    I40E_HW_OUTER_UDP_CSUM_CAPABLE);

#define I40E_FDEVICT_PCTYPE_DEFAULT 0xc03
                if (rd32(&pf->hw, I40E_GLQF_FDEVICTENA(1)) !=
                    I40E_FDEVICT_PCTYPE_DEFAULT) {
                        dev_warn(&pf->pdev->dev,
                                 "FD EVICT PCTYPES are not right, disable FD HW EVICT\n");
                        pf->hw_features &= ~I40E_HW_ATR_EVICT_CAPABLE;
                }
        } else if ((pf->hw.aq.api_maj_ver > 1) ||
                   ((pf->hw.aq.api_maj_ver == 1) &&
                    (pf->hw.aq.api_min_ver > 4))) {
                /* Supported in FW API version higher than 1.4 */
                pf->hw_features |= I40E_HW_GENEVE_OFFLOAD_CAPABLE;
        }

        /* Enable HW ATR eviction if possible */
        if (pf->hw_features & I40E_HW_ATR_EVICT_CAPABLE)
                pf->flags |= I40E_FLAG_HW_ATR_EVICT_ENABLED;

        if ((pf->hw.mac.type == I40E_MAC_XL710) &&
            (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 33)) ||
            (pf->hw.aq.fw_maj_ver < 4))) {
                pf->hw_features |= I40E_HW_RESTART_AUTONEG;
                /* No DCB support  for FW < v4.33 */
                pf->hw_features |= I40E_HW_NO_DCB_SUPPORT;
        }

        /* Disable FW LLDP if FW < v4.3 */
        if ((pf->hw.mac.type == I40E_MAC_XL710) &&
            (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 3)) ||
            (pf->hw.aq.fw_maj_ver < 4)))
                pf->hw_features |= I40E_HW_STOP_FW_LLDP;

        /* Use the FW Set LLDP MIB API if FW > v4.40 */
        if ((pf->hw.mac.type == I40E_MAC_XL710) &&
            (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver >= 40)) ||
            (pf->hw.aq.fw_maj_ver >= 5)))
                pf->hw_features |= I40E_HW_USE_SET_LLDP_MIB;

        if (pf->hw.func_caps.vmdq) {
                pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
                pf->flags |= I40E_FLAG_VMDQ_ENABLED;
                pf->num_vmdq_qps = i40e_default_queues_per_vmdq(pf);
        }

        if (pf->hw.func_caps.iwarp) {
                pf->flags |= I40E_FLAG_IWARP_ENABLED;
                /* IWARP needs one extra vector for CQP just like MISC.*/
                pf->num_iwarp_msix = (int)num_online_cpus() + 1;
        }

#ifdef CONFIG_PCI_IOV
        if (pf->hw.func_caps.num_vfs && pf->hw.partition_id == 1) {
                pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
                pf->flags |= I40E_FLAG_SRIOV_ENABLED;
                pf->num_req_vfs = min_t(int,
                                        pf->hw.func_caps.num_vfs,
                                        I40E_MAX_VF_COUNT);
        }
#endif /* CONFIG_PCI_IOV */
        pf->eeprom_version = 0xDEAD;
        pf->lan_veb = I40E_NO_VEB;
        pf->lan_vsi = I40E_NO_VSI;

        /* By default FW has this off for performance reasons */
        pf->flags &= ~I40E_FLAG_VEB_STATS_ENABLED;

        /* set up queue assignment tracking */
        size = sizeof(struct i40e_lump_tracking)
                + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
        pf->qp_pile = kzalloc(size, GFP_KERNEL);
        if (!pf->qp_pile) {
                err = -ENOMEM;
                goto sw_init_done;
        }
        pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
        pf->qp_pile->search_hint = 0;

        pf->tx_timeout_recovery_level = 1;

        mutex_init(&pf->switch_mutex);

sw_init_done:
        return err;
}

/**
 * i40e_set_ntuple - set the ntuple feature flag and take action
 * @pf: board private structure to initialize
 * @features: the feature set that the stack is suggesting
 *
 * returns a bool to indicate if reset needs to happen
 **/
bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
{
        bool need_reset = false;

        /* Check if Flow Director n-tuple support was enabled or disabled.  If
         * the state changed, we need to reset.
         */
        if (features & NETIF_F_NTUPLE) {
                /* Enable filters and mark for reset */
                if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
                        need_reset = true;
                /* enable FD_SB only if there is MSI-X vector */
                if (pf->num_fdsb_msix > 0)
                        pf->flags |= I40E_FLAG_FD_SB_ENABLED;
        } else {
                /* turn off filters, mark for reset and clear SW filter list */
                if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
                        need_reset = true;
                        i40e_fdir_filter_exit(pf);
                }
                pf->flags &= ~(I40E_FLAG_FD_SB_ENABLED |
                               I40E_FLAG_FD_SB_AUTO_DISABLED);
                /* reset fd counters */
                pf->fd_add_err = 0;
                pf->fd_atr_cnt = 0;
                /* if ATR was auto disabled it can be re-enabled. */
                if (pf->flags & I40E_FLAG_FD_ATR_AUTO_DISABLED) {
                        pf->flags &= ~I40E_FLAG_FD_ATR_AUTO_DISABLED;
                        if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
                            (I40E_DEBUG_FD & pf->hw.debug_mask))
                                dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
                }
        }
        return need_reset;
}

/**
 * i40e_clear_rss_lut - clear the rx hash lookup table
 * @vsi: the VSI being configured
 **/
static void i40e_clear_rss_lut(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        u16 vf_id = vsi->vf_id;
        u8 i;

        if (vsi->type == I40E_VSI_MAIN) {
                for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
                        wr32(hw, I40E_PFQF_HLUT(i), 0);
        } else if (vsi->type == I40E_VSI_SRIOV) {
                for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
                        i40e_write_rx_ctl(hw, I40E_VFQF_HLUT1(i, vf_id), 0);
        } else {
                dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
        }
}

/**
 * i40e_set_features - set the netdev feature flags
 * @netdev: ptr to the netdev being adjusted
 * @features: the feature set that the stack is suggesting
 * Note: expects to be called while under rtnl_lock()
 **/
static int i40e_set_features(struct net_device *netdev,
                             netdev_features_t features)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        bool need_reset;

        if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
                i40e_pf_config_rss(pf);
        else if (!(features & NETIF_F_RXHASH) &&
                 netdev->features & NETIF_F_RXHASH)
                i40e_clear_rss_lut(vsi);

        if (features & NETIF_F_HW_VLAN_CTAG_RX)
                i40e_vlan_stripping_enable(vsi);
        else
                i40e_vlan_stripping_disable(vsi);

        need_reset = i40e_set_ntuple(pf, features);

        if (need_reset)
                i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED), true);

        return 0;
}

/**
 * i40e_get_udp_port_idx - Lookup a possibly offloaded for Rx UDP port
 * @pf: board private structure
 * @port: The UDP port to look up
 *
 * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
 **/
static u8 i40e_get_udp_port_idx(struct i40e_pf *pf, u16 port)
{
        u8 i;

        for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
                if (pf->udp_ports[i].port == port)
                        return i;
        }

        return i;
}

/**
 * i40e_udp_tunnel_add - Get notifications about UDP tunnel ports that come up
 * @netdev: This physical port's netdev
 * @ti: Tunnel endpoint information
 **/
static void i40e_udp_tunnel_add(struct net_device *netdev,
                                struct udp_tunnel_info *ti)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        u16 port = ntohs(ti->port);
        u8 next_idx;
        u8 idx;

        idx = i40e_get_udp_port_idx(pf, port);

        /* Check if port already exists */
        if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
                netdev_info(netdev, "port %d already offloaded\n", port);
                return;
        }

        /* Now check if there is space to add the new port */
        next_idx = i40e_get_udp_port_idx(pf, 0);

        if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
                netdev_info(netdev, "maximum number of offloaded UDP ports reached, not adding port %d\n",
                            port);
                return;
        }

        switch (ti->type) {
        case UDP_TUNNEL_TYPE_VXLAN:
                pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_VXLAN;
                break;
        case UDP_TUNNEL_TYPE_GENEVE:
                if (!(pf->hw_features & I40E_HW_GENEVE_OFFLOAD_CAPABLE))
                        return;
                pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_NGE;
                break;
        default:
                return;
        }

        /* New port: add it and mark its index in the bitmap */
        pf->udp_ports[next_idx].port = port;
        pf->pending_udp_bitmap |= BIT_ULL(next_idx);
        pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
}

/**
 * i40e_udp_tunnel_del - Get notifications about UDP tunnel ports that go away
 * @netdev: This physical port's netdev
 * @ti: Tunnel endpoint information
 **/
static void i40e_udp_tunnel_del(struct net_device *netdev,
                                struct udp_tunnel_info *ti)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        u16 port = ntohs(ti->port);
        u8 idx;

        idx = i40e_get_udp_port_idx(pf, port);

        /* Check if port already exists */
        if (idx >= I40E_MAX_PF_UDP_OFFLOAD_PORTS)
                goto not_found;

        switch (ti->type) {
        case UDP_TUNNEL_TYPE_VXLAN:
                if (pf->udp_ports[idx].type != I40E_AQC_TUNNEL_TYPE_VXLAN)
                        goto not_found;
                break;
        case UDP_TUNNEL_TYPE_GENEVE:
                if (pf->udp_ports[idx].type != I40E_AQC_TUNNEL_TYPE_NGE)
                        goto not_found;
                break;
        default:
                goto not_found;
        }

        /* if port exists, set it to 0 (mark for deletion)
         * and make it pending
         */
        pf->udp_ports[idx].port = 0;
        pf->pending_udp_bitmap |= BIT_ULL(idx);
        pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;

        return;
not_found:
        netdev_warn(netdev, "UDP port %d was not found, not deleting\n",
                    port);
}

static int i40e_get_phys_port_id(struct net_device *netdev,
                                 struct netdev_phys_item_id *ppid)
{
        struct i40e_netdev_priv *np = netdev_priv(netdev);
        struct i40e_pf *pf = np->vsi->back;
        struct i40e_hw *hw = &pf->hw;

        if (!(pf->hw_features & I40E_HW_PORT_ID_VALID))
                return -EOPNOTSUPP;

        ppid->id_len = min_t(int, sizeof(hw->mac.port_addr), sizeof(ppid->id));
        memcpy(ppid->id, hw->mac.port_addr, ppid->id_len);

        return 0;
}

/**
 * i40e_ndo_fdb_add - add an entry to the hardware database
 * @ndm: the input from the stack
 * @tb: pointer to array of nladdr (unused)
 * @dev: the net device pointer
 * @addr: the MAC address entry being added
 * @flags: instructions from stack about fdb operation
 */
static int i40e_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
                            struct net_device *dev,
                            const unsigned char *addr, u16 vid,
                            u16 flags)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_pf *pf = np->vsi->back;
        int err = 0;

        if (!(pf->flags & I40E_FLAG_SRIOV_ENABLED))
                return -EOPNOTSUPP;

        if (vid) {
                pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
                return -EINVAL;
        }

        /* Hardware does not support aging addresses so if a
         * ndm_state is given only allow permanent addresses
         */
        if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
                netdev_info(dev, "FDB only supports static addresses\n");
                return -EINVAL;
        }

        if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
                err = dev_uc_add_excl(dev, addr);
        else if (is_multicast_ether_addr(addr))
                err = dev_mc_add_excl(dev, addr);
        else
                err = -EINVAL;

        /* Only return duplicate errors if NLM_F_EXCL is set */
        if (err == -EEXIST && !(flags & NLM_F_EXCL))
                err = 0;

        return err;
}

/**
 * i40e_ndo_bridge_setlink - Set the hardware bridge mode
 * @dev: the netdev being configured
 * @nlh: RTNL message
 *
 * Inserts a new hardware bridge if not already created and
 * enables the bridging mode requested (VEB or VEPA). If the
 * hardware bridge has already been inserted and the request
 * is to change the mode then that requires a PF reset to
 * allow rebuild of the components with required hardware
 * bridge mode enabled.
 *
 * Note: expects to be called while under rtnl_lock()
 **/
static int i40e_ndo_bridge_setlink(struct net_device *dev,
                                   struct nlmsghdr *nlh,
                                   u16 flags)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_veb *veb = NULL;
        struct nlattr *attr, *br_spec;
        int i, rem;

        /* Only for PF VSI for now */
        if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
                return -EOPNOTSUPP;

        /* Find the HW bridge for PF VSI */
        for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
                if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
                        veb = pf->veb[i];
        }

        br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);

        nla_for_each_nested(attr, br_spec, rem) {
                __u16 mode;

                if (nla_type(attr) != IFLA_BRIDGE_MODE)
                        continue;

                mode = nla_get_u16(attr);
                if ((mode != BRIDGE_MODE_VEPA) &&
                    (mode != BRIDGE_MODE_VEB))
                        return -EINVAL;

                /* Insert a new HW bridge */
                if (!veb) {
                        veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                        if (veb) {
                                veb->bridge_mode = mode;
                                i40e_config_bridge_mode(veb);
                        } else {
                                /* No Bridge HW offload available */
                                return -ENOENT;
                        }
                        break;
                } else if (mode != veb->bridge_mode) {
                        /* Existing HW bridge but different mode needs reset */
                        veb->bridge_mode = mode;
                        /* TODO: If no VFs or VMDq VSIs, disallow VEB mode */
                        if (mode == BRIDGE_MODE_VEB)
                                pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
                        else
                                pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
                        i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED),
                                      true);
                        break;
                }
        }

        return 0;
}

/**
 * i40e_ndo_bridge_getlink - Get the hardware bridge mode
 * @skb: skb buff
 * @pid: process id
 * @seq: RTNL message seq #
 * @dev: the netdev being configured
 * @filter_mask: unused
 * @nlflags: netlink flags passed in
 *
 * Return the mode in which the hardware bridge is operating in
 * i.e VEB or VEPA.
 **/
static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
                                   struct net_device *dev,
                                   u32 __always_unused filter_mask,
                                   int nlflags)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;
        struct i40e_pf *pf = vsi->back;
        struct i40e_veb *veb = NULL;
        int i;

        /* Only for PF VSI for now */
        if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
                return -EOPNOTSUPP;

        /* Find the HW bridge for the PF VSI */
        for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
                if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
                        veb = pf->veb[i];
        }

        if (!veb)
                return 0;

        return ndo_dflt_bridge_getlink(skb, pid, seq, dev, veb->bridge_mode,
                                       0, 0, nlflags, filter_mask, NULL);
}

/**
 * i40e_features_check - Validate encapsulated packet conforms to limits
 * @skb: skb buff
 * @dev: This physical port's netdev
 * @features: Offload features that the stack believes apply
 **/
static netdev_features_t i40e_features_check(struct sk_buff *skb,
                                             struct net_device *dev,
                                             netdev_features_t features)
{
        size_t len;

        /* No point in doing any of this if neither checksum nor GSO are
         * being requested for this frame.  We can rule out both by just
         * checking for CHECKSUM_PARTIAL
         */
        if (skb->ip_summed != CHECKSUM_PARTIAL)
                return features;

        /* We cannot support GSO if the MSS is going to be less than
         * 64 bytes.  If it is then we need to drop support for GSO.
         */
        if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
                features &= ~NETIF_F_GSO_MASK;

        /* MACLEN can support at most 63 words */
        len = skb_network_header(skb) - skb->data;
        if (len & ~(63 * 2))
                goto out_err;

        /* IPLEN and EIPLEN can support at most 127 dwords */
        len = skb_transport_header(skb) - skb_network_header(skb);
        if (len & ~(127 * 4))
                goto out_err;

        if (skb->encapsulation) {
                /* L4TUNLEN can support 127 words */
                len = skb_inner_network_header(skb) - skb_transport_header(skb);
                if (len & ~(127 * 2))
                        goto out_err;

                /* IPLEN can support at most 127 dwords */
                len = skb_inner_transport_header(skb) -
                      skb_inner_network_header(skb);
                if (len & ~(127 * 4))
                        goto out_err;
        }

        /* No need to validate L4LEN as TCP is the only protocol with a
         * a flexible value and we support all possible values supported
         * by TCP, which is at most 15 dwords
         */

        return features;
out_err:
        return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
}

/**
 * i40e_xdp_setup - add/remove an XDP program
 * @vsi: VSI to changed
 * @prog: XDP program
 **/
static int i40e_xdp_setup(struct i40e_vsi *vsi,
                          struct bpf_prog *prog)
{
        int frame_size = vsi->netdev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
        struct i40e_pf *pf = vsi->back;
        struct bpf_prog *old_prog;
        bool need_reset;
        int i;

        /* Don't allow frames that span over multiple buffers */
        if (frame_size > vsi->rx_buf_len)
                return -EINVAL;

        if (!i40e_enabled_xdp_vsi(vsi) && !prog)
                return 0;

        /* When turning XDP on->off/off->on we reset and rebuild the rings. */
        need_reset = (i40e_enabled_xdp_vsi(vsi) != !!prog);

        if (need_reset)
                i40e_prep_for_reset(pf, true);

        old_prog = xchg(&vsi->xdp_prog, prog);

        if (need_reset)
                i40e_reset_and_rebuild(pf, true, true);

        for (i = 0; i < vsi->num_queue_pairs; i++)
                WRITE_ONCE(vsi->rx_rings[i]->xdp_prog, vsi->xdp_prog);

        if (old_prog)
                bpf_prog_put(old_prog);

        return 0;
}

/**
 * i40e_xdp - implements ndo_xdp for i40e
 * @dev: netdevice
 * @xdp: XDP command
 **/
static int i40e_xdp(struct net_device *dev,
                    struct netdev_xdp *xdp)
{
        struct i40e_netdev_priv *np = netdev_priv(dev);
        struct i40e_vsi *vsi = np->vsi;

        if (vsi->type != I40E_VSI_MAIN)
                return -EINVAL;

        switch (xdp->command) {
        case XDP_SETUP_PROG:
                return i40e_xdp_setup(vsi, xdp->prog);
        case XDP_QUERY_PROG:
                xdp->prog_attached = i40e_enabled_xdp_vsi(vsi);
                xdp->prog_id = vsi->xdp_prog ? vsi->xdp_prog->aux->id : 0;
                return 0;
        default:
                return -EINVAL;
        }
}

static const struct net_device_ops i40e_netdev_ops = {
        .ndo_open               = i40e_open,
        .ndo_stop               = i40e_close,
        .ndo_start_xmit         = i40e_lan_xmit_frame,
        .ndo_get_stats64        = i40e_get_netdev_stats_struct,
        .ndo_set_rx_mode        = i40e_set_rx_mode,
        .ndo_validate_addr      = eth_validate_addr,
        .ndo_set_mac_address    = i40e_set_mac,
        .ndo_change_mtu         = i40e_change_mtu,
        .ndo_do_ioctl           = i40e_ioctl,
        .ndo_tx_timeout         = i40e_tx_timeout,
        .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
        .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
        .ndo_poll_controller    = i40e_netpoll,
#endif
        .ndo_setup_tc           = __i40e_setup_tc,
        .ndo_set_features       = i40e_set_features,
        .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
        .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
        .ndo_set_vf_rate        = i40e_ndo_set_vf_bw,
        .ndo_get_vf_config      = i40e_ndo_get_vf_config,
        .ndo_set_vf_link_state  = i40e_ndo_set_vf_link_state,
        .ndo_set_vf_spoofchk    = i40e_ndo_set_vf_spoofchk,
        .ndo_set_vf_trust       = i40e_ndo_set_vf_trust,
        .ndo_udp_tunnel_add     = i40e_udp_tunnel_add,
        .ndo_udp_tunnel_del     = i40e_udp_tunnel_del,
        .ndo_get_phys_port_id   = i40e_get_phys_port_id,
        .ndo_fdb_add            = i40e_ndo_fdb_add,
        .ndo_features_check     = i40e_features_check,
        .ndo_bridge_getlink     = i40e_ndo_bridge_getlink,
        .ndo_bridge_setlink     = i40e_ndo_bridge_setlink,
        .ndo_xdp                = i40e_xdp,
};

/**
 * i40e_config_netdev - Setup the netdev flags
 * @vsi: the VSI being configured
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_config_netdev(struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_netdev_priv *np;
        struct net_device *netdev;
        u8 broadcast[ETH_ALEN];
        u8 mac_addr[ETH_ALEN];
        int etherdev_size;
        netdev_features_t hw_enc_features;
        netdev_features_t hw_features;

        etherdev_size = sizeof(struct i40e_netdev_priv);
        netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
        if (!netdev)
                return -ENOMEM;

        vsi->netdev = netdev;
        np = netdev_priv(netdev);
        np->vsi = vsi;

        hw_enc_features = NETIF_F_SG                    |
                          NETIF_F_IP_CSUM               |
                          NETIF_F_IPV6_CSUM             |
                          NETIF_F_HIGHDMA               |
                          NETIF_F_SOFT_FEATURES         |
                          NETIF_F_TSO                   |
                          NETIF_F_TSO_ECN               |
                          NETIF_F_TSO6                  |
                          NETIF_F_GSO_GRE               |
                          NETIF_F_GSO_GRE_CSUM          |
                          NETIF_F_GSO_PARTIAL           |
                          NETIF_F_GSO_UDP_TUNNEL        |
                          NETIF_F_GSO_UDP_TUNNEL_CSUM   |
                          NETIF_F_SCTP_CRC              |
                          NETIF_F_RXHASH                |
                          NETIF_F_RXCSUM                |
                          0;

        if (!(pf->hw_features & I40E_HW_OUTER_UDP_CSUM_CAPABLE))
                netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;

        netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;

        netdev->hw_enc_features |= hw_enc_features;

        /* record features VLANs can make use of */
        netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;

        if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
                netdev->hw_features |= NETIF_F_NTUPLE;
        hw_features = hw_enc_features           |
                      NETIF_F_HW_VLAN_CTAG_TX   |
                      NETIF_F_HW_VLAN_CTAG_RX;

        netdev->hw_features |= hw_features;

        netdev->features |= hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
        netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;

        if (vsi->type == I40E_VSI_MAIN) {
                SET_NETDEV_DEV(netdev, &pf->pdev->dev);
                ether_addr_copy(mac_addr, hw->mac.perm_addr);
                /* The following steps are necessary for two reasons. First,
                 * some older NVM configurations load a default MAC-VLAN
                 * filter that will accept any tagged packet, and we want to
                 * replace this with a normal filter. Additionally, it is
                 * possible our MAC address was provided by the platform using
                 * Open Firmware or similar.
                 *
                 * Thus, we need to remove the default filter and install one
                 * specific to the MAC address.
                 */
                i40e_rm_default_mac_filter(vsi, mac_addr);
                spin_lock_bh(&vsi->mac_filter_hash_lock);
                i40e_add_mac_filter(vsi, mac_addr);
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
        } else {
                /* Relate the VSI_VMDQ name to the VSI_MAIN name. Note that we
                 * are still limited by IFNAMSIZ, but we're adding 'v%d\0' to
                 * the end, which is 4 bytes long, so force truncation of the
                 * original name by IFNAMSIZ - 4
                 */
                snprintf(netdev->name, IFNAMSIZ, "%.*sv%%d",
                         IFNAMSIZ - 4,
                         pf->vsi[pf->lan_vsi]->netdev->name);
                random_ether_addr(mac_addr);

                spin_lock_bh(&vsi->mac_filter_hash_lock);
                i40e_add_mac_filter(vsi, mac_addr);
                spin_unlock_bh(&vsi->mac_filter_hash_lock);
        }

        /* Add the broadcast filter so that we initially will receive
         * broadcast packets. Note that when a new VLAN is first added the
         * driver will convert all filters marked I40E_VLAN_ANY into VLAN
         * specific filters as part of transitioning into "vlan" operation.
         * When more VLANs are added, the driver will copy each existing MAC
         * filter and add it for the new VLAN.
         *
         * Broadcast filters are handled specially by
         * i40e_sync_filters_subtask, as the driver must to set the broadcast
         * promiscuous bit instead of adding this directly as a MAC/VLAN
         * filter. The subtask will update the correct broadcast promiscuous
         * bits as VLANs become active or inactive.
         */
        eth_broadcast_addr(broadcast);
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        i40e_add_mac_filter(vsi, broadcast);
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        ether_addr_copy(netdev->dev_addr, mac_addr);
        ether_addr_copy(netdev->perm_addr, mac_addr);

        netdev->priv_flags |= IFF_UNICAST_FLT;
        netdev->priv_flags |= IFF_SUPP_NOFCS;
        /* Setup netdev TC information */
        i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);

        netdev->netdev_ops = &i40e_netdev_ops;
        netdev->watchdog_timeo = 5 * HZ;
        i40e_set_ethtool_ops(netdev);

        /* MTU range: 68 - 9706 */
        netdev->min_mtu = ETH_MIN_MTU;
        netdev->max_mtu = I40E_MAX_RXBUFFER - I40E_PACKET_HDR_PAD;

        return 0;
}

/**
 * i40e_vsi_delete - Delete a VSI from the switch
 * @vsi: the VSI being removed
 *
 * Returns 0 on success, negative value on failure
 **/
static void i40e_vsi_delete(struct i40e_vsi *vsi)
{
        /* remove default VSI is not allowed */
        if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
                return;

        i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
}

/**
 * i40e_is_vsi_uplink_mode_veb - Check if the VSI's uplink bridge mode is VEB
 * @vsi: the VSI being queried
 *
 * Returns 1 if HW bridge mode is VEB and return 0 in case of VEPA mode
 **/
int i40e_is_vsi_uplink_mode_veb(struct i40e_vsi *vsi)
{
        struct i40e_veb *veb;
        struct i40e_pf *pf = vsi->back;

        /* Uplink is not a bridge so default to VEB */
        if (vsi->veb_idx == I40E_NO_VEB)
                return 1;

        veb = pf->veb[vsi->veb_idx];
        if (!veb) {
                dev_info(&pf->pdev->dev,
                         "There is no veb associated with the bridge\n");
                return -ENOENT;
        }

        /* Uplink is a bridge in VEPA mode */
        if (veb->bridge_mode & BRIDGE_MODE_VEPA) {
                return 0;
        } else {
                /* Uplink is a bridge in VEB mode */
                return 1;
        }

        /* VEPA is now default bridge, so return 0 */
        return 0;
}

/**
 * i40e_add_vsi - Add a VSI to the switch
 * @vsi: the VSI being configured
 *
 * This initializes a VSI context depending on the VSI type to be added and
 * passes it down to the add_vsi aq command.
 **/
static int i40e_add_vsi(struct i40e_vsi *vsi)
{
        int ret = -ENODEV;
        struct i40e_pf *pf = vsi->back;
        struct i40e_hw *hw = &pf->hw;
        struct i40e_vsi_context ctxt;
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;

        u8 enabled_tc = 0x1; /* TC0 enabled */
        int f_count = 0;

        memset(&ctxt, 0, sizeof(ctxt));
        switch (vsi->type) {
        case I40E_VSI_MAIN:
                /* The PF's main VSI is already setup as part of the
                 * device initialization, so we'll not bother with
                 * the add_vsi call, but we will retrieve the current
                 * VSI context.
                 */
                ctxt.seid = pf->main_vsi_seid;
                ctxt.pf_num = pf->hw.pf_id;
                ctxt.vf_num = 0;
                ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
                ctxt.flags = I40E_AQ_VSI_TYPE_PF;
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "couldn't get PF vsi config, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        return -ENOENT;
                }
                vsi->info = ctxt.info;
                vsi->info.valid_sections = 0;

                vsi->seid = ctxt.seid;
                vsi->id = ctxt.vsi_number;

                enabled_tc = i40e_pf_get_tc_map(pf);

                /* MFP mode setup queue map and update VSI */
                if ((pf->flags & I40E_FLAG_MFP_ENABLED) &&
                    !(pf->hw.func_caps.iscsi)) { /* NIC type PF */
                        memset(&ctxt, 0, sizeof(ctxt));
                        ctxt.seid = pf->main_vsi_seid;
                        ctxt.pf_num = pf->hw.pf_id;
                        ctxt.vf_num = 0;
                        i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
                        ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
                        if (ret) {
                                dev_info(&pf->pdev->dev,
                                         "update vsi failed, err %s aq_err %s\n",
                                         i40e_stat_str(&pf->hw, ret),
                                         i40e_aq_str(&pf->hw,
                                                    pf->hw.aq.asq_last_status));
                                ret = -ENOENT;
                                goto err;
                        }
                        /* update the local VSI info queue map */
                        i40e_vsi_update_queue_map(vsi, &ctxt);
                        vsi->info.valid_sections = 0;
                } else {
                        /* Default/Main VSI is only enabled for TC0
                         * reconfigure it to enable all TCs that are
                         * available on the port in SFP mode.
                         * For MFP case the iSCSI PF would use this
                         * flow to enable LAN+iSCSI TC.
                         */
                        ret = i40e_vsi_config_tc(vsi, enabled_tc);
                        if (ret) {
                                /* Single TC condition is not fatal,
                                 * message and continue
                                 */
                                dev_info(&pf->pdev->dev,
                                         "failed to configure TCs for main VSI tc_map 0x%08x, err %s aq_err %s\n",
                                         enabled_tc,
                                         i40e_stat_str(&pf->hw, ret),
                                         i40e_aq_str(&pf->hw,
                                                    pf->hw.aq.asq_last_status));
                        }
                }
                break;

        case I40E_VSI_FDIR:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = 0;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_PF;
                if ((pf->flags & I40E_FLAG_VEB_MODE_ENABLED) &&
                    (i40e_is_vsi_uplink_mode_veb(vsi))) {
                        ctxt.info.valid_sections |=
                             cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                           cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_VMDQ2:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = 0;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;

                /* This VSI is connected to VEB so the switch_id
                 * should be set to zero by default.
                 */
                if (i40e_is_vsi_uplink_mode_veb(vsi)) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                                cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }

                /* Setup the VSI tx/rx queue map for TC0 only for now */
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_SRIOV:
                ctxt.pf_num = hw->pf_id;
                ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
                ctxt.uplink_seid = vsi->uplink_seid;
                ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
                ctxt.flags = I40E_AQ_VSI_TYPE_VF;

                /* This VSI is connected to VEB so the switch_id
                 * should be set to zero by default.
                 */
                if (i40e_is_vsi_uplink_mode_veb(vsi)) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
                        ctxt.info.switch_id =
                                cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
                }

                if (vsi->back->flags & I40E_FLAG_IWARP_ENABLED) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
                        ctxt.info.queueing_opt_flags |=
                                (I40E_AQ_VSI_QUE_OPT_TCP_ENA |
                                 I40E_AQ_VSI_QUE_OPT_RSS_LUT_VSI);
                }

                ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
                ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
                if (pf->vf[vsi->vf_id].spoofchk) {
                        ctxt.info.valid_sections |=
                                cpu_to_le16(I40E_AQ_VSI_PROP_SECURITY_VALID);
                        ctxt.info.sec_flags |=
                                (I40E_AQ_VSI_SEC_FLAG_ENABLE_VLAN_CHK |
                                 I40E_AQ_VSI_SEC_FLAG_ENABLE_MAC_CHK);
                }
                /* Setup the VSI tx/rx queue map for TC0 only for now */
                i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
                break;

        case I40E_VSI_IWARP:
                /* send down message to iWARP */
                break;

        default:
                return -ENODEV;
        }

        if (vsi->type != I40E_VSI_MAIN) {
                ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
                if (ret) {
                        dev_info(&vsi->back->pdev->dev,
                                 "add vsi failed, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        ret = -ENOENT;
                        goto err;
                }
                vsi->info = ctxt.info;
                vsi->info.valid_sections = 0;
                vsi->seid = ctxt.seid;
                vsi->id = ctxt.vsi_number;
        }

        vsi->active_filters = 0;
        clear_bit(__I40E_VSI_OVERFLOW_PROMISC, vsi->state);
        spin_lock_bh(&vsi->mac_filter_hash_lock);
        /* If macvlan filters already exist, force them to get loaded */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                f->state = I40E_FILTER_NEW;
                f_count++;
        }
        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        if (f_count) {
                vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
                pf->flags |= I40E_FLAG_FILTER_SYNC;
        }

        /* Update VSI BW information */
        ret = i40e_vsi_get_bw_info(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get vsi bw info, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                /* VSI is already added so not tearing that up */
                ret = 0;
        }

err:
        return ret;
}

/**
 * i40e_vsi_release - Delete a VSI and free its resources
 * @vsi: the VSI being removed
 *
 * Returns 0 on success or < 0 on error
 **/
int i40e_vsi_release(struct i40e_vsi *vsi)
{
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        struct i40e_veb *veb = NULL;
        struct i40e_pf *pf;
        u16 uplink_seid;
        int i, n, bkt;

        pf = vsi->back;

        /* release of a VEB-owner or last VSI is not allowed */
        if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
                dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
                         vsi->seid, vsi->uplink_seid);
                return -ENODEV;
        }
        if (vsi == pf->vsi[pf->lan_vsi] &&
            !test_bit(__I40E_DOWN, pf->state)) {
                dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
                return -ENODEV;
        }

        uplink_seid = vsi->uplink_seid;
        if (vsi->type != I40E_VSI_SRIOV) {
                if (vsi->netdev_registered) {
                        vsi->netdev_registered = false;
                        if (vsi->netdev) {
                                /* results in a call to i40e_close() */
                                unregister_netdev(vsi->netdev);
                        }
                } else {
                        i40e_vsi_close(vsi);
                }
                i40e_vsi_disable_irq(vsi);
        }

        spin_lock_bh(&vsi->mac_filter_hash_lock);

        /* clear the sync flag on all filters */
        if (vsi->netdev) {
                __dev_uc_unsync(vsi->netdev, NULL);
                __dev_mc_unsync(vsi->netdev, NULL);
        }

        /* make sure any remaining filters are marked for deletion */
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist)
                __i40e_del_filter(vsi, f);

        spin_unlock_bh(&vsi->mac_filter_hash_lock);

        i40e_sync_vsi_filters(vsi);

        i40e_vsi_delete(vsi);
        i40e_vsi_free_q_vectors(vsi);
        if (vsi->netdev) {
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
        i40e_vsi_clear_rings(vsi);
        i40e_vsi_clear(vsi);

        /* If this was the last thing on the VEB, except for the
         * controlling VSI, remove the VEB, which puts the controlling
         * VSI onto the next level down in the switch.
         *
         * Well, okay, there's one more exception here: don't remove
         * the orphan VEBs yet.  We'll wait for an explicit remove request
         * from up the network stack.
         */
        for (n = 0, i = 0; i < pf->num_alloc_vsi; i++) {
                if (pf->vsi[i] &&
                    pf->vsi[i]->uplink_seid == uplink_seid &&
                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
                        n++;      /* count the VSIs */
                }
        }
        for (i = 0; i < I40E_MAX_VEB; i++) {
                if (!pf->veb[i])
                        continue;
                if (pf->veb[i]->uplink_seid == uplink_seid)
                        n++;     /* count the VEBs */
                if (pf->veb[i]->seid == uplink_seid)
                        veb = pf->veb[i];
        }
        if (n == 0 && veb && veb->uplink_seid != 0)
                i40e_veb_release(veb);

        return 0;
}

/**
 * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
 * @vsi: ptr to the VSI
 *
 * This should only be called after i40e_vsi_mem_alloc() which allocates the
 * corresponding SW VSI structure and initializes num_queue_pairs for the
 * newly allocated VSI.
 *
 * Returns 0 on success or negative on failure
 **/
static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
{
        int ret = -ENOENT;
        struct i40e_pf *pf = vsi->back;

        if (vsi->q_vectors[0]) {
                dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
                         vsi->seid);
                return -EEXIST;
        }

        if (vsi->base_vector) {
                dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
                         vsi->seid, vsi->base_vector);
                return -EEXIST;
        }

        ret = i40e_vsi_alloc_q_vectors(vsi);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "failed to allocate %d q_vector for VSI %d, ret=%d\n",
                         vsi->num_q_vectors, vsi->seid, ret);
                vsi->num_q_vectors = 0;
                goto vector_setup_out;
        }

        /* In Legacy mode, we do not have to get any other vector since we
         * piggyback on the misc/ICR0 for queue interrupts.
        */
        if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
                return ret;
        if (vsi->num_q_vectors)
                vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
                                                 vsi->num_q_vectors, vsi->idx);
        if (vsi->base_vector < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d vectors for VSI %d, err=%d\n",
                         vsi->num_q_vectors, vsi->seid, vsi->base_vector);
                i40e_vsi_free_q_vectors(vsi);
                ret = -ENOENT;
                goto vector_setup_out;
        }

vector_setup_out:
        return ret;
}

/**
 * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
 * @vsi: pointer to the vsi.
 *
 * This re-allocates a vsi's queue resources.
 *
 * Returns pointer to the successfully allocated and configured VSI sw struct
 * on success, otherwise returns NULL on failure.
 **/
static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
{
        u16 alloc_queue_pairs;
        struct i40e_pf *pf;
        u8 enabled_tc;
        int ret;

        if (!vsi)
                return NULL;

        pf = vsi->back;

        i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
        i40e_vsi_clear_rings(vsi);

        i40e_vsi_free_arrays(vsi, false);
        i40e_set_num_rings_in_vsi(vsi);
        ret = i40e_vsi_alloc_arrays(vsi, false);
        if (ret)
                goto err_vsi;

        alloc_queue_pairs = vsi->alloc_queue_pairs *
                            (i40e_enabled_xdp_vsi(vsi) ? 2 : 1);

        ret = i40e_get_lump(pf, pf->qp_pile, alloc_queue_pairs, vsi->idx);
        if (ret < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d queues for VSI %d err %d\n",
                         alloc_queue_pairs, vsi->seid, ret);
                goto err_vsi;
        }
        vsi->base_queue = ret;

        /* Update the FW view of the VSI. Force a reset of TC and queue
         * layout configurations.
         */
        enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
        pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
        pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
        i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
        if (vsi->type == I40E_VSI_MAIN)
                i40e_rm_default_mac_filter(vsi, pf->hw.mac.perm_addr);

        /* assign it some queues */
        ret = i40e_alloc_rings(vsi);
        if (ret)
                goto err_rings;

        /* map all of the rings to the q_vectors */
        i40e_vsi_map_rings_to_vectors(vsi);
        return vsi;

err_rings:
        i40e_vsi_free_q_vectors(vsi);
        if (vsi->netdev_registered) {
                vsi->netdev_registered = false;
                unregister_netdev(vsi->netdev);
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
        i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
err_vsi:
        i40e_vsi_clear(vsi);
        return NULL;
}

/**
 * i40e_vsi_setup - Set up a VSI by a given type
 * @pf: board private structure
 * @type: VSI type
 * @uplink_seid: the switch element to link to
 * @param1: usage depends upon VSI type. For VF types, indicates VF id
 *
 * This allocates the sw VSI structure and its queue resources, then add a VSI
 * to the identified VEB.
 *
 * Returns pointer to the successfully allocated and configure VSI sw struct on
 * success, otherwise returns NULL on failure.
 **/
struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
                                u16 uplink_seid, u32 param1)
{
        struct i40e_vsi *vsi = NULL;
        struct i40e_veb *veb = NULL;
        u16 alloc_queue_pairs;
        int ret, i;
        int v_idx;

        /* The requested uplink_seid must be either
         *     - the PF's port seid
         *              no VEB is needed because this is the PF
         *              or this is a Flow Director special case VSI
         *     - seid of an existing VEB
         *     - seid of a VSI that owns an existing VEB
         *     - seid of a VSI that doesn't own a VEB
         *              a new VEB is created and the VSI becomes the owner
         *     - seid of the PF VSI, which is what creates the first VEB
         *              this is a special case of the previous
         *
         * Find which uplink_seid we were given and create a new VEB if needed
         */
        for (i = 0; i < I40E_MAX_VEB; i++) {
                if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
                        veb = pf->veb[i];
                        break;
                }
        }

        if (!veb && uplink_seid != pf->mac_seid) {

                for (i = 0; i < pf->num_alloc_vsi; i++) {
                        if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
                                vsi = pf->vsi[i];
                                break;
                        }
                }
                if (!vsi) {
                        dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
                                 uplink_seid);
                        return NULL;
                }

                if (vsi->uplink_seid == pf->mac_seid)
                        veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
                        veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
                                             vsi->tc_config.enabled_tc);
                if (veb) {
                        if (vsi->seid != pf->vsi[pf->lan_vsi]->seid) {
                                dev_info(&vsi->back->pdev->dev,
                                         "New VSI creation error, uplink seid of LAN VSI expected.\n");
                                return NULL;
                        }
                        /* We come up by default in VEPA mode if SRIOV is not
                         * already enabled, in which case we can't force VEPA
                         * mode.
                         */
                        if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) {
                                veb->bridge_mode = BRIDGE_MODE_VEPA;
                                pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
                        }
                        i40e_config_bridge_mode(veb);
                }
                for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
                        if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
                                veb = pf->veb[i];
                }
                if (!veb) {
                        dev_info(&pf->pdev->dev, "couldn't add VEB\n");
                        return NULL;
                }

                vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
                uplink_seid = veb->seid;
        }

        /* get vsi sw struct */
        v_idx = i40e_vsi_mem_alloc(pf, type);
        if (v_idx < 0)
                goto err_alloc;
        vsi = pf->vsi[v_idx];
        if (!vsi)
                goto err_alloc;
        vsi->type = type;
        vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);

        if (type == I40E_VSI_MAIN)
                pf->lan_vsi = v_idx;
        else if (type == I40E_VSI_SRIOV)
                vsi->vf_id = param1;
        /* assign it some queues */
        alloc_queue_pairs = vsi->alloc_queue_pairs *
                            (i40e_enabled_xdp_vsi(vsi) ? 2 : 1);

        ret = i40e_get_lump(pf, pf->qp_pile, alloc_queue_pairs, vsi->idx);
        if (ret < 0) {
                dev_info(&pf->pdev->dev,
                         "failed to get tracking for %d queues for VSI %d err=%d\n",
                         alloc_queue_pairs, vsi->seid, ret);
                goto err_vsi;
        }
        vsi->base_queue = ret;

        /* get a VSI from the hardware */
        vsi->uplink_seid = uplink_seid;
        ret = i40e_add_vsi(vsi);
        if (ret)
                goto err_vsi;

        switch (vsi->type) {
        /* setup the netdev if needed */
        case I40E_VSI_MAIN:
        case I40E_VSI_VMDQ2:
                ret = i40e_config_netdev(vsi);
                if (ret)
                        goto err_netdev;
                ret = register_netdev(vsi->netdev);
                if (ret)
                        goto err_netdev;
                vsi->netdev_registered = true;
                netif_carrier_off(vsi->netdev);
#ifdef CONFIG_I40E_DCB
                /* Setup DCB netlink interface */
                i40e_dcbnl_setup(vsi);
#endif /* CONFIG_I40E_DCB */
                /* fall through */

        case I40E_VSI_FDIR:
                /* set up vectors and rings if needed */
                ret = i40e_vsi_setup_vectors(vsi);
                if (ret)
                        goto err_msix;

                ret = i40e_alloc_rings(vsi);
                if (ret)
                        goto err_rings;

                /* map all of the rings to the q_vectors */
                i40e_vsi_map_rings_to_vectors(vsi);

                i40e_vsi_reset_stats(vsi);
                break;

        default:
                /* no netdev or rings for the other VSI types */
                break;
        }

        if ((pf->hw_features & I40E_HW_RSS_AQ_CAPABLE) &&
            (vsi->type == I40E_VSI_VMDQ2)) {
                ret = i40e_vsi_config_rss(vsi);
        }
        return vsi;

err_rings:
        i40e_vsi_free_q_vectors(vsi);
err_msix:
        if (vsi->netdev_registered) {
                vsi->netdev_registered = false;
                unregister_netdev(vsi->netdev);
                free_netdev(vsi->netdev);
                vsi->netdev = NULL;
        }
err_netdev:
        i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
err_vsi:
        i40e_vsi_clear(vsi);
err_alloc:
        return NULL;
}

/**
 * i40e_veb_get_bw_info - Query VEB BW information
 * @veb: the veb to query
 *
 * Query the Tx scheduler BW configuration data for given VEB
 **/
static int i40e_veb_get_bw_info(struct i40e_veb *veb)
{
        struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
        struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
        struct i40e_pf *pf = veb->pf;
        struct i40e_hw *hw = &pf->hw;
        u32 tc_bw_max;
        int ret = 0;
        int i;

        ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
                                                  &bw_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "query veb bw config failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
                goto out;
        }

        ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
                                                   &ets_data, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "query veb bw ets config failed, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
                goto out;
        }

        veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
        veb->bw_max_quanta = ets_data.tc_bw_max;
        veb->is_abs_credits = bw_data.absolute_credits_enable;
        veb->enabled_tc = ets_data.tc_valid_bits;
        tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
                    (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
        for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
                veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
                veb->bw_tc_limit_credits[i] =
                                        le16_to_cpu(bw_data.tc_bw_limits[i]);
                veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
        }

out:
        return ret;
}

/**
 * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
 * @pf: board private structure
 *
 * On error: returns error code (negative)
 * On success: returns vsi index in PF (positive)
 **/
static int i40e_veb_mem_alloc(struct i40e_pf *pf)
{
        int ret = -ENOENT;
        struct i40e_veb *veb;
        int i;

        /* Need to protect the allocation of switch elements at the PF level */
        mutex_lock(&pf->switch_mutex);

        /* VEB list may be fragmented if VEB creation/destruction has
         * been happening.  We can afford to do a quick scan to look
         * for any free slots in the list.
         *
         * find next empty veb slot, looping back around if necessary
         */
        i = 0;
        while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
                i++;
        if (i >= I40E_MAX_VEB) {
                ret = -ENOMEM;
                goto err_alloc_veb;  /* out of VEB slots! */
        }

        veb = kzalloc(sizeof(*veb), GFP_KERNEL);
        if (!veb) {
                ret = -ENOMEM;
                goto err_alloc_veb;
        }
        veb->pf = pf;
        veb->idx = i;
        veb->enabled_tc = 1;

        pf->veb[i] = veb;
        ret = i;
err_alloc_veb:
        mutex_unlock(&pf->switch_mutex);
        return ret;
}

/**
 * i40e_switch_branch_release - Delete a branch of the switch tree
 * @branch: where to start deleting
 *
 * This uses recursion to find the tips of the branch to be
 * removed, deleting until we get back to and can delete this VEB.
 **/
static void i40e_switch_branch_release(struct i40e_veb *branch)
{
        struct i40e_pf *pf = branch->pf;
        u16 branch_seid = branch->seid;
        u16 veb_idx = branch->idx;
        int i;

        /* release any VEBs on this VEB - RECURSION */
        for (i = 0; i < I40E_MAX_VEB; i++) {
                if (!pf->veb[i])
                        continue;
                if (pf->veb[i]->uplink_seid == branch->seid)
                        i40e_switch_branch_release(pf->veb[i]);
        }

        /* Release the VSIs on this VEB, but not the owner VSI.
         *
         * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
         *       the VEB itself, so don't use (*branch) after this loop.
         */
        for (i = 0; i < pf->num_alloc_vsi; i++) {
                if (!pf->vsi[i])
                        continue;
                if (pf->vsi[i]->uplink_seid == branch_seid &&
                   (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
                        i40e_vsi_release(pf->vsi[i]);
                }
        }

        /* There's one corner case where the VEB might not have been
         * removed, so double check it here and remove it if needed.
         * This case happens if the veb was created from the debugfs
         * commands and no VSIs were added to it.
         */
        if (pf->veb[veb_idx])
                i40e_veb_release(pf->veb[veb_idx]);
}

/**
 * i40e_veb_clear - remove veb struct
 * @veb: the veb to remove
 **/
static void i40e_veb_clear(struct i40e_veb *veb)
{
        if (!veb)
                return;

        if (veb->pf) {
                struct i40e_pf *pf = veb->pf;

                mutex_lock(&pf->switch_mutex);
                if (pf->veb[veb->idx] == veb)
                        pf->veb[veb->idx] = NULL;
                mutex_unlock(&pf->switch_mutex);
        }

        kfree(veb);
}

/**
 * i40e_veb_release - Delete a VEB and free its resources
 * @veb: the VEB being removed
 **/
void i40e_veb_release(struct i40e_veb *veb)
{
        struct i40e_vsi *vsi = NULL;
        struct i40e_pf *pf;
        int i, n = 0;

        pf = veb->pf;

        /* find the remaining VSI and check for extras */
        for (i = 0; i < pf->num_alloc_vsi; i++) {
                if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
                        n++;
                        vsi = pf->vsi[i];
                }
        }
        if (n != 1) {
                dev_info(&pf->pdev->dev,
                         "can't remove VEB %d with %d VSIs left\n",
                         veb->seid, n);
                return;
        }

        /* move the remaining VSI to uplink veb */
        vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
        if (veb->uplink_seid) {
                vsi->uplink_seid = veb->uplink_seid;
                if (veb->uplink_seid == pf->mac_seid)
                        vsi->veb_idx = I40E_NO_VEB;
                else
                        vsi->veb_idx = veb->veb_idx;
        } else {
                /* floating VEB */
                vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
                vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
        }

        i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
        i40e_veb_clear(veb);
}

/**
 * i40e_add_veb - create the VEB in the switch
 * @veb: the VEB to be instantiated
 * @vsi: the controlling VSI
 **/
static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
{
        struct i40e_pf *pf = veb->pf;
        bool enable_stats = !!(pf->flags & I40E_FLAG_VEB_STATS_ENABLED);
        int ret;

        ret = i40e_aq_add_veb(&pf->hw, veb->uplink_seid, vsi->seid,
                              veb->enabled_tc, false,
                              &veb->seid, enable_stats, NULL);

        /* get a VEB from the hardware */
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't add VEB, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EPERM;
        }

        /* get statistics counter */
        ret = i40e_aq_get_veb_parameters(&pf->hw, veb->seid, NULL, NULL,
                                         &veb->stats_idx, NULL, NULL, NULL);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get VEB statistics idx, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return -EPERM;
        }
        ret = i40e_veb_get_bw_info(veb);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't get VEB bw info, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
                return -ENOENT;
        }

        vsi->uplink_seid = veb->seid;
        vsi->veb_idx = veb->idx;
        vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;

        return 0;
}

/**
 * i40e_veb_setup - Set up a VEB
 * @pf: board private structure
 * @flags: VEB setup flags
 * @uplink_seid: the switch element to link to
 * @vsi_seid: the initial VSI seid
 * @enabled_tc: Enabled TC bit-map
 *
 * This allocates the sw VEB structure and links it into the switch
 * It is possible and legal for this to be a duplicate of an already
 * existing VEB.  It is also possible for both uplink and vsi seids
 * to be zero, in order to create a floating VEB.
 *
 * Returns pointer to the successfully allocated VEB sw struct on
 * success, otherwise returns NULL on failure.
 **/
struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
                                u16 uplink_seid, u16 vsi_seid,
                                u8 enabled_tc)
{
        struct i40e_veb *veb, *uplink_veb = NULL;
        int vsi_idx, veb_idx;
        int ret;

        /* if one seid is 0, the other must be 0 to create a floating relay */
        if ((uplink_seid == 0 || vsi_seid == 0) &&
            (uplink_seid + vsi_seid != 0)) {
                dev_info(&pf->pdev->dev,
                         "one, not both seid's are 0: uplink=%d vsi=%d\n",
                         uplink_seid, vsi_seid);
                return NULL;
        }

        /* make sure there is such a vsi and uplink */
        for (vsi_idx = 0; vsi_idx < pf->num_alloc_vsi; vsi_idx++)
                if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
                        break;
        if (vsi_idx >= pf->num_alloc_vsi && vsi_seid != 0) {
                dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
                         vsi_seid);
                return NULL;
        }

        if (uplink_seid && uplink_seid != pf->mac_seid) {
                for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
                        if (pf->veb[veb_idx] &&
                            pf->veb[veb_idx]->seid == uplink_seid) {
                                uplink_veb = pf->veb[veb_idx];
                                break;
                        }
                }
                if (!uplink_veb) {
                        dev_info(&pf->pdev->dev,
                                 "uplink seid %d not found\n", uplink_seid);
                        return NULL;
                }
        }

        /* get veb sw struct */
        veb_idx = i40e_veb_mem_alloc(pf);
        if (veb_idx < 0)
                goto err_alloc;
        veb = pf->veb[veb_idx];
        veb->flags = flags;
        veb->uplink_seid = uplink_seid;
        veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
        veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);

        /* create the VEB in the switch */
        ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
        if (ret)
                goto err_veb;
        if (vsi_idx == pf->lan_vsi)
                pf->lan_veb = veb->idx;

        return veb;

err_veb:
        i40e_veb_clear(veb);
err_alloc:
        return NULL;
}

/**
 * i40e_setup_pf_switch_element - set PF vars based on switch type
 * @pf: board private structure
 * @ele: element we are building info from
 * @num_reported: total number of elements
 * @printconfig: should we print the contents
 *
 * helper function to assist in extracting a few useful SEID values.
 **/
static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
                                struct i40e_aqc_switch_config_element_resp *ele,
                                u16 num_reported, bool printconfig)
{
        u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
        u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
        u8 element_type = ele->element_type;
        u16 seid = le16_to_cpu(ele->seid);

        if (printconfig)
                dev_info(&pf->pdev->dev,
                         "type=%d seid=%d uplink=%d downlink=%d\n",
                         element_type, seid, uplink_seid, downlink_seid);

        switch (element_type) {
        case I40E_SWITCH_ELEMENT_TYPE_MAC:
                pf->mac_seid = seid;
                break;
        case I40E_SWITCH_ELEMENT_TYPE_VEB:
                /* Main VEB? */
                if (uplink_seid != pf->mac_seid)
                        break;
                if (pf->lan_veb == I40E_NO_VEB) {
                        int v;

                        /* find existing or else empty VEB */
                        for (v = 0; v < I40E_MAX_VEB; v++) {
                                if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
                                        pf->lan_veb = v;
                                        break;
                                }
                        }
                        if (pf->lan_veb == I40E_NO_VEB) {
                                v = i40e_veb_mem_alloc(pf);
                                if (v < 0)
                                        break;
                                pf->lan_veb = v;
                        }
                }

                pf->veb[pf->lan_veb]->seid = seid;
                pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
                pf->veb[pf->lan_veb]->pf = pf;
                pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
                break;
        case I40E_SWITCH_ELEMENT_TYPE_VSI:
                if (num_reported != 1)
                        break;
                /* This is immediately after a reset so we can assume this is
                 * the PF's VSI
                 */
                pf->mac_seid = uplink_seid;
                pf->pf_seid = downlink_seid;
                pf->main_vsi_seid = seid;
                if (printconfig)
                        dev_info(&pf->pdev->dev,
                                 "pf_seid=%d main_vsi_seid=%d\n",
                                 pf->pf_seid, pf->main_vsi_seid);
                break;
        case I40E_SWITCH_ELEMENT_TYPE_PF:
        case I40E_SWITCH_ELEMENT_TYPE_VF:
        case I40E_SWITCH_ELEMENT_TYPE_EMP:
        case I40E_SWITCH_ELEMENT_TYPE_BMC:
        case I40E_SWITCH_ELEMENT_TYPE_PE:
        case I40E_SWITCH_ELEMENT_TYPE_PA:
                /* ignore these for now */
                break;
        default:
                dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
                         element_type, seid);
                break;
        }
}

/**
 * i40e_fetch_switch_configuration - Get switch config from firmware
 * @pf: board private structure
 * @printconfig: should we print the contents
 *
 * Get the current switch configuration from the device and
 * extract a few useful SEID values.
 **/
int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
{
        struct i40e_aqc_get_switch_config_resp *sw_config;
        u16 next_seid = 0;
        int ret = 0;
        u8 *aq_buf;
        int i;

        aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
        if (!aq_buf)
                return -ENOMEM;

        sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
        do {
                u16 num_reported, num_total;

                ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
                                                I40E_AQ_LARGE_BUF,
                                                &next_seid, NULL);
                if (ret) {
                        dev_info(&pf->pdev->dev,
                                 "get switch config failed err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        kfree(aq_buf);
                        return -ENOENT;
                }

                num_reported = le16_to_cpu(sw_config->header.num_reported);
                num_total = le16_to_cpu(sw_config->header.num_total);

                if (printconfig)
                        dev_info(&pf->pdev->dev,
                                 "header: %d reported %d total\n",
                                 num_reported, num_total);

                for (i = 0; i < num_reported; i++) {
                        struct i40e_aqc_switch_config_element_resp *ele =
                                &sw_config->element[i];

                        i40e_setup_pf_switch_element(pf, ele, num_reported,
                                                     printconfig);
                }
        } while (next_seid != 0);

        kfree(aq_buf);
        return ret;
}

/**
 * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
 * @pf: board private structure
 * @reinit: if the Main VSI needs to re-initialized.
 *
 * Returns 0 on success, negative value on failure
 **/
static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
{
        u16 flags = 0;
        int ret;

        /* find out what's out there already */
        ret = i40e_fetch_switch_configuration(pf, false);
        if (ret) {
                dev_info(&pf->pdev->dev,
                         "couldn't fetch switch config, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, ret),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
                return ret;
        }
        i40e_pf_reset_stats(pf);

        /* set the switch config bit for the whole device to
         * support limited promisc or true promisc
         * when user requests promisc. The default is limited
         * promisc.
        */

        if ((pf->hw.pf_id == 0) &&
            !(pf->flags & I40E_FLAG_TRUE_PROMISC_SUPPORT))
                flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;

        if (pf->hw.pf_id == 0) {
                u16 valid_flags;

                valid_flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;
                ret = i40e_aq_set_switch_config(&pf->hw, flags, valid_flags,
                                                NULL);
                if (ret && pf->hw.aq.asq_last_status != I40E_AQ_RC_ESRCH) {
                        dev_info(&pf->pdev->dev,
                                 "couldn't set switch config bits, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, ret),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
                        /* not a fatal problem, just keep going */
                }
        }

        /* first time setup */
        if (pf->lan_vsi == I40E_NO_VSI || reinit) {
                struct i40e_vsi *vsi = NULL;
                u16 uplink_seid;

                /* Set up the PF VSI associated with the PF's main VSI
                 * that is already in the HW switch
                 */
                if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
                        uplink_seid = pf->veb[pf->lan_veb]->seid;
                else
                        uplink_seid = pf->mac_seid;
                if (pf->lan_vsi == I40E_NO_VSI)
                        vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
                else if (reinit)
                        vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
                if (!vsi) {
                        dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
                        i40e_fdir_teardown(pf);
                        return -EAGAIN;
                }
        } else {
                /* force a reset of TC and queue layout configurations */
                u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;

                pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
                pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
                i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
        }
        i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);

        i40e_fdir_sb_setup(pf);

        /* Setup static PF queue filter control settings */
        ret = i40e_setup_pf_filter_control(pf);
        if (ret) {
                dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
                         ret);
                /* Failure here should not stop continuing other steps */
        }

        /* enable RSS in the HW, even for only one queue, as the stack can use
         * the hash
         */
        if ((pf->flags & I40E_FLAG_RSS_ENABLED))
                i40e_pf_config_rss(pf);

        /* fill in link information and enable LSE reporting */
        i40e_link_event(pf);

        /* Initialize user-specific link properties */
        pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
                                  I40E_AQ_AN_COMPLETED) ? true : false);

        i40e_ptp_init(pf);

        /* repopulate tunnel port filters */
        i40e_sync_udp_filters(pf);

        return ret;
}

/**
 * i40e_determine_queue_usage - Work out queue distribution
 * @pf: board private structure
 **/
static void i40e_determine_queue_usage(struct i40e_pf *pf)
{
        int queues_left;

        pf->num_lan_qps = 0;

        /* Find the max queues to be put into basic use.  We'll always be
         * using TC0, whether or not DCB is running, and TC0 will get the
         * big RSS set.
         */
        queues_left = pf->hw.func_caps.num_tx_qp;

        if ((queues_left == 1) ||
            !(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
                /* one qp for PF, no queues for anything else */
                queues_left = 0;
                pf->alloc_rss_size = pf->num_lan_qps = 1;

                /* make sure all the fancies are disabled */
                pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
                               I40E_FLAG_IWARP_ENABLED  |
                               I40E_FLAG_FD_SB_ENABLED  |
                               I40E_FLAG_FD_ATR_ENABLED |
                               I40E_FLAG_DCB_CAPABLE    |
                               I40E_FLAG_DCB_ENABLED    |
                               I40E_FLAG_SRIOV_ENABLED  |
                               I40E_FLAG_VMDQ_ENABLED);
        } else if (!(pf->flags & (I40E_FLAG_RSS_ENABLED |
                                  I40E_FLAG_FD_SB_ENABLED |
                                  I40E_FLAG_FD_ATR_ENABLED |
                                  I40E_FLAG_DCB_CAPABLE))) {
                /* one qp for PF */
                pf->alloc_rss_size = pf->num_lan_qps = 1;
                queues_left -= pf->num_lan_qps;

                pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
                               I40E_FLAG_IWARP_ENABLED  |
                               I40E_FLAG_FD_SB_ENABLED  |
                               I40E_FLAG_FD_ATR_ENABLED |
                               I40E_FLAG_DCB_ENABLED    |
                               I40E_FLAG_VMDQ_ENABLED);
        } else {
                /* Not enough queues for all TCs */
                if ((pf->flags & I40E_FLAG_DCB_CAPABLE) &&
                    (queues_left < I40E_MAX_TRAFFIC_CLASS)) {
                        pf->flags &= ~(I40E_FLAG_DCB_CAPABLE |
                                        I40E_FLAG_DCB_ENABLED);
                        dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
                }
                pf->num_lan_qps = max_t(int, pf->rss_size_max,
                                        num_online_cpus());
                pf->num_lan_qps = min_t(int, pf->num_lan_qps,
                                        pf->hw.func_caps.num_tx_qp);

                queues_left -= pf->num_lan_qps;
        }

        if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
                if (queues_left > 1) {
                        queues_left -= 1; /* save 1 queue for FD */
                } else {
                        pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
                        dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
                }
        }

        if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
            pf->num_vf_qps && pf->num_req_vfs && queues_left) {
                pf->num_req_vfs = min_t(int, pf->num_req_vfs,
                                        (queues_left / pf->num_vf_qps));
                queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
        }

        if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
            pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
                pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
                                          (queues_left / pf->num_vmdq_qps));
                queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
        }

        pf->queues_left = queues_left;
        dev_dbg(&pf->pdev->dev,
                "qs_avail=%d FD SB=%d lan_qs=%d lan_tc0=%d vf=%d*%d vmdq=%d*%d, remaining=%d\n",
                pf->hw.func_caps.num_tx_qp,
                !!(pf->flags & I40E_FLAG_FD_SB_ENABLED),
                pf->num_lan_qps, pf->alloc_rss_size, pf->num_req_vfs,
                pf->num_vf_qps, pf->num_vmdq_vsis, pf->num_vmdq_qps,
                queues_left);
}

/**
 * i40e_setup_pf_filter_control - Setup PF static filter control
 * @pf: PF to be setup
 *
 * i40e_setup_pf_filter_control sets up a PF's initial filter control
 * settings. If PE/FCoE are enabled then it will also set the per PF
 * based filter sizes required for them. It also enables Flow director,
 * ethertype and macvlan type filter settings for the pf.
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
{
        struct i40e_filter_control_settings *settings = &pf->filter_settings;

        settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;

        /* Flow Director is enabled */
        if (pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED))
                settings->enable_fdir = true;

        /* Ethtype and MACVLAN filters enabled for PF */
        settings->enable_ethtype = true;
        settings->enable_macvlan = true;

        if (i40e_set_filter_control(&pf->hw, settings))
                return -ENOENT;

        return 0;
}

#define INFO_STRING_LEN 255
#define REMAIN(__x) (INFO_STRING_LEN - (__x))
static void i40e_print_features(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        char *buf;
        int i;

        buf = kmalloc(INFO_STRING_LEN, GFP_KERNEL);
        if (!buf)
                return;

        i = snprintf(buf, INFO_STRING_LEN, "Features: PF-id[%d]", hw->pf_id);
#ifdef CONFIG_PCI_IOV
        i += snprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
#endif
        i += snprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
                      pf->hw.func_caps.num_vsis,
                      pf->vsi[pf->lan_vsi]->num_queue_pairs);
        if (pf->flags & I40E_FLAG_RSS_ENABLED)
                i += snprintf(&buf[i], REMAIN(i), " RSS");
        if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
                i += snprintf(&buf[i], REMAIN(i), " FD_ATR");
        if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
                i += snprintf(&buf[i], REMAIN(i), " FD_SB");
                i += snprintf(&buf[i], REMAIN(i), " NTUPLE");
        }
        if (pf->flags & I40E_FLAG_DCB_CAPABLE)
                i += snprintf(&buf[i], REMAIN(i), " DCB");
        i += snprintf(&buf[i], REMAIN(i), " VxLAN");
        i += snprintf(&buf[i], REMAIN(i), " Geneve");
        if (pf->flags & I40E_FLAG_PTP)
                i += snprintf(&buf[i], REMAIN(i), " PTP");
        if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
                i += snprintf(&buf[i], REMAIN(i), " VEB");
        else
                i += snprintf(&buf[i], REMAIN(i), " VEPA");

        dev_info(&pf->pdev->dev, "%s\n", buf);
        kfree(buf);
        WARN_ON(i > INFO_STRING_LEN);
}

/**
 * i40e_get_platform_mac_addr - get platform-specific MAC address
 * @pdev: PCI device information struct
 * @pf: board private structure
 *
 * Look up the MAC address for the device. First we'll try
 * eth_platform_get_mac_address, which will check Open Firmware, or arch
 * specific fallback. Otherwise, we'll default to the stored value in
 * firmware.
 **/
static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
{
        if (eth_platform_get_mac_address(&pdev->dev, pf->hw.mac.addr))
                i40e_get_mac_addr(&pf->hw, pf->hw.mac.addr);
}

/**
 * i40e_probe - Device initialization routine
 * @pdev: PCI device information struct
 * @ent: entry in i40e_pci_tbl
 *
 * i40e_probe initializes a PF identified by a pci_dev structure.
 * The OS initialization, configuring of the PF private structure,
 * and a hardware reset occur.
 *
 * Returns 0 on success, negative on failure
 **/
static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
        struct i40e_aq_get_phy_abilities_resp abilities;
        struct i40e_pf *pf;
        struct i40e_hw *hw;
        static u16 pfs_found;
        u16 wol_nvm_bits;
        u16 link_status;
        int err;
        u32 val;
        u32 i;
        u8 set_fc_aq_fail;

        err = pci_enable_device_mem(pdev);
        if (err)
                return err;

        /* set up for high or low dma */
        err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
        if (err) {
                err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
                if (err) {
                        dev_err(&pdev->dev,
                                "DMA configuration failed: 0x%x\n", err);
                        goto err_dma;
                }
        }

        /* set up pci connections */
        err = pci_request_mem_regions(pdev, i40e_driver_name);
        if (err) {
                dev_info(&pdev->dev,
                         "pci_request_selected_regions failed %d\n", err);
                goto err_pci_reg;
        }

        pci_enable_pcie_error_reporting(pdev);
        pci_set_master(pdev);

        /* Now that we have a PCI connection, we need to do the
         * low level device setup.  This is primarily setting up
         * the Admin Queue structures and then querying for the
         * device's current profile information.
         */
        pf = kzalloc(sizeof(*pf), GFP_KERNEL);
        if (!pf) {
                err = -ENOMEM;
                goto err_pf_alloc;
        }
        pf->next_vsi = 0;
        pf->pdev = pdev;
        set_bit(__I40E_DOWN, pf->state);

        hw = &pf->hw;
        hw->back = pf;

        pf->ioremap_len = min_t(int, pci_resource_len(pdev, 0),
                                I40E_MAX_CSR_SPACE);

        hw->hw_addr = ioremap(pci_resource_start(pdev, 0), pf->ioremap_len);
        if (!hw->hw_addr) {
                err = -EIO;
                dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
                         (unsigned int)pci_resource_start(pdev, 0),
                         pf->ioremap_len, err);
                goto err_ioremap;
        }
        hw->vendor_id = pdev->vendor;
        hw->device_id = pdev->device;
        pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
        hw->subsystem_vendor_id = pdev->subsystem_vendor;
        hw->subsystem_device_id = pdev->subsystem_device;
        hw->bus.device = PCI_SLOT(pdev->devfn);
        hw->bus.func = PCI_FUNC(pdev->devfn);
        hw->bus.bus_id = pdev->bus->number;
        pf->instance = pfs_found;

        INIT_LIST_HEAD(&pf->l3_flex_pit_list);
        INIT_LIST_HEAD(&pf->l4_flex_pit_list);

        /* set up the locks for the AQ, do this only once in probe
         * and destroy them only once in remove
         */
        mutex_init(&hw->aq.asq_mutex);
        mutex_init(&hw->aq.arq_mutex);

        pf->msg_enable = netif_msg_init(debug,
                                        NETIF_MSG_DRV |
                                        NETIF_MSG_PROBE |
                                        NETIF_MSG_LINK);
        if (debug < -1)
                pf->hw.debug_mask = debug;

        /* do a special CORER for clearing PXE mode once at init */
        if (hw->revision_id == 0 &&
            (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
                wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
                i40e_flush(hw);
                msleep(200);
                pf->corer_count++;

                i40e_clear_pxe_mode(hw);
        }

        /* Reset here to make sure all is clean and to define PF 'n' */
        i40e_clear_hw(hw);
        err = i40e_pf_reset(hw);
        if (err) {
                dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
                goto err_pf_reset;
        }
        pf->pfr_count++;

        hw->aq.num_arq_entries = I40E_AQ_LEN;
        hw->aq.num_asq_entries = I40E_AQ_LEN;
        hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
        hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
        pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;

        snprintf(pf->int_name, sizeof(pf->int_name) - 1,
                 "%s-%s:misc",
                 dev_driver_string(&pf->pdev->dev), dev_name(&pdev->dev));

        err = i40e_init_shared_code(hw);
        if (err) {
                dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
                         err);
                goto err_pf_reset;
        }

        /* set up a default setting for link flow control */
        pf->hw.fc.requested_mode = I40E_FC_NONE;

        err = i40e_init_adminq(hw);
        if (err) {
                if (err == I40E_ERR_FIRMWARE_API_VERSION)
                        dev_info(&pdev->dev,
                                 "The driver for the device stopped because the NVM image is newer than expected. You must install the most recent version of the network driver.\n");
                else
                        dev_info(&pdev->dev,
                                 "The driver for the device stopped because the device firmware failed to init. Try updating your NVM image.\n");

                goto err_pf_reset;
        }
        i40e_get_oem_version(hw);

        /* provide nvm, fw, api versions */
        dev_info(&pdev->dev, "fw %d.%d.%05d api %d.%d nvm %s\n",
                 hw->aq.fw_maj_ver, hw->aq.fw_min_ver, hw->aq.fw_build,
                 hw->aq.api_maj_ver, hw->aq.api_min_ver,
                 i40e_nvm_version_str(hw));

        if (hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
            hw->aq.api_min_ver > I40E_FW_API_VERSION_MINOR)
                dev_info(&pdev->dev,
                         "The driver for the device detected a newer version of the NVM image than expected. Please install the most recent version of the network driver.\n");
        else if (hw->aq.api_maj_ver < I40E_FW_API_VERSION_MAJOR ||
                 hw->aq.api_min_ver < (I40E_FW_API_VERSION_MINOR - 1))
                dev_info(&pdev->dev,
                         "The driver for the device detected an older version of the NVM image than expected. Please update the NVM image.\n");

        i40e_verify_eeprom(pf);

        /* Rev 0 hardware was never productized */
        if (hw->revision_id < 1)
                dev_warn(&pdev->dev, "This device is a pre-production adapter/LOM. Please be aware there may be issues with your hardware. If you are experiencing problems please contact your Intel or hardware representative who provided you with this hardware.\n");

        i40e_clear_pxe_mode(hw);
        err = i40e_get_capabilities(pf);
        if (err)
                goto err_adminq_setup;

        err = i40e_sw_init(pf);
        if (err) {
                dev_info(&pdev->dev, "sw_init failed: %d\n", err);
                goto err_sw_init;
        }

        err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
                                hw->func_caps.num_rx_qp, 0, 0);
        if (err) {
                dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
                goto err_init_lan_hmc;
        }

        err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
        if (err) {
                dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
                err = -ENOENT;
                goto err_configure_lan_hmc;
        }

        /* Disable LLDP for NICs that have firmware versions lower than v4.3.
         * Ignore error return codes because if it was already disabled via
         * hardware settings this will fail
         */
        if (pf->hw_features & I40E_HW_STOP_FW_LLDP) {
                dev_info(&pdev->dev, "Stopping firmware LLDP agent.\n");
                i40e_aq_stop_lldp(hw, true, NULL);
        }

        /* allow a platform config to override the HW addr */
        i40e_get_platform_mac_addr(pdev, pf);

        if (!is_valid_ether_addr(hw->mac.addr)) {
                dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
                err = -EIO;
                goto err_mac_addr;
        }
        dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
        ether_addr_copy(hw->mac.perm_addr, hw->mac.addr);
        i40e_get_port_mac_addr(hw, hw->mac.port_addr);
        if (is_valid_ether_addr(hw->mac.port_addr))
                pf->hw_features |= I40E_HW_PORT_ID_VALID;

        pci_set_drvdata(pdev, pf);
        pci_save_state(pdev);
#ifdef CONFIG_I40E_DCB
        err = i40e_init_pf_dcb(pf);
        if (err) {
                dev_info(&pdev->dev, "DCB init failed %d, disabled\n", err);
                pf->flags &= ~(I40E_FLAG_DCB_CAPABLE | I40E_FLAG_DCB_ENABLED);
                /* Continue without DCB enabled */
        }
#endif /* CONFIG_I40E_DCB */

        /* set up periodic task facility */
        setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
        pf->service_timer_period = HZ;

        INIT_WORK(&pf->service_task, i40e_service_task);
        clear_bit(__I40E_SERVICE_SCHED, pf->state);

        /* NVM bit on means WoL disabled for the port */
        i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
        if (BIT (hw->port) & wol_nvm_bits || hw->partition_id != 1)
                pf->wol_en = false;
        else
                pf->wol_en = true;
        device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);

        /* set up the main switch operations */
        i40e_determine_queue_usage(pf);
        err = i40e_init_interrupt_scheme(pf);
        if (err)
                goto err_switch_setup;

        /* The number of VSIs reported by the FW is the minimum guaranteed
         * to us; HW supports far more and we share the remaining pool with
         * the other PFs. We allocate space for more than the guarantee with
         * the understanding that we might not get them all later.
         */
        if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
                pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
        else
                pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;

        /* Set up the *vsi struct and our local tracking of the MAIN PF vsi. */
        pf->vsi = kcalloc(pf->num_alloc_vsi, sizeof(struct i40e_vsi *),
                          GFP_KERNEL);
        if (!pf->vsi) {
                err = -ENOMEM;
                goto err_switch_setup;
        }

#ifdef CONFIG_PCI_IOV
        /* prep for VF support */
        if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
            (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
            !test_bit(__I40E_BAD_EEPROM, pf->state)) {
                if (pci_num_vf(pdev))
                        pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
        }
#endif
        err = i40e_setup_pf_switch(pf, false);
        if (err) {
                dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
                goto err_vsis;
        }

        /* Make sure flow control is set according to current settings */
        err = i40e_set_fc(hw, &set_fc_aq_fail, true);
        if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_GET)
                dev_dbg(&pf->pdev->dev,
                        "Set fc with err %s aq_err %s on get_phy_cap\n",
                        i40e_stat_str(hw, err),
                        i40e_aq_str(hw, hw->aq.asq_last_status));
        if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_SET)
                dev_dbg(&pf->pdev->dev,
                        "Set fc with err %s aq_err %s on set_phy_config\n",
                        i40e_stat_str(hw, err),
                        i40e_aq_str(hw, hw->aq.asq_last_status));
        if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_UPDATE)
                dev_dbg(&pf->pdev->dev,
                        "Set fc with err %s aq_err %s on get_link_info\n",
                        i40e_stat_str(hw, err),
                        i40e_aq_str(hw, hw->aq.asq_last_status));

        /* if FDIR VSI was set up, start it now */
        for (i = 0; i < pf->num_alloc_vsi; i++) {
                if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
                        i40e_vsi_open(pf->vsi[i]);
                        break;
                }
        }

        /* The driver only wants link up/down and module qualification
         * reports from firmware.  Note the negative logic.
         */
        err = i40e_aq_set_phy_int_mask(&pf->hw,
                                       ~(I40E_AQ_EVENT_LINK_UPDOWN |
                                         I40E_AQ_EVENT_MEDIA_NA |
                                         I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
        if (err)
                dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
                         i40e_stat_str(&pf->hw, err),
                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* Reconfigure hardware for allowing smaller MSS in the case
         * of TSO, so that we avoid the MDD being fired and causing
         * a reset in the case of small MSS+TSO.
         */
        val = rd32(hw, I40E_REG_MSS);
        if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
                val &= ~I40E_REG_MSS_MIN_MASK;
                val |= I40E_64BYTE_MSS;
                wr32(hw, I40E_REG_MSS, val);
        }

        if (pf->hw_features & I40E_HW_RESTART_AUTONEG) {
                msleep(75);
                err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
                if (err)
                        dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
                                 i40e_stat_str(&pf->hw, err),
                                 i40e_aq_str(&pf->hw,
                                             pf->hw.aq.asq_last_status));
        }
        /* The main driver is (mostly) up and happy. We need to set this state
         * before setting up the misc vector or we get a race and the vector
         * ends up disabled forever.
         */
        clear_bit(__I40E_DOWN, pf->state);

        /* In case of MSIX we are going to setup the misc vector right here
         * to handle admin queue events etc. In case of legacy and MSI
         * the misc functionality and queue processing is combined in
         * the same vector and that gets setup at open.
         */
        if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
                err = i40e_setup_misc_vector(pf);
                if (err) {
                        dev_info(&pdev->dev,
                                 "setup of misc vector failed: %d\n", err);
                        goto err_vsis;
                }
        }

#ifdef CONFIG_PCI_IOV
        /* prep for VF support */
        if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
            (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
            !test_bit(__I40E_BAD_EEPROM, pf->state)) {
                /* disable link interrupts for VFs */
                val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
                val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
                wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
                i40e_flush(hw);

                if (pci_num_vf(pdev)) {
                        dev_info(&pdev->dev,
                                 "Active VFs found, allocating resources.\n");
                        err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
                        if (err)
                                dev_info(&pdev->dev,
                                         "Error %d allocating resources for existing VFs\n",
                                         err);
                }
        }
#endif /* CONFIG_PCI_IOV */

        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                pf->iwarp_base_vector = i40e_get_lump(pf, pf->irq_pile,
                                                      pf->num_iwarp_msix,
                                                      I40E_IWARP_IRQ_PILE_ID);
                if (pf->iwarp_base_vector < 0) {
                        dev_info(&pdev->dev,
                                 "failed to get tracking for %d vectors for IWARP err=%d\n",
                                 pf->num_iwarp_msix, pf->iwarp_base_vector);
                        pf->flags &= ~I40E_FLAG_IWARP_ENABLED;
                }
        }

        i40e_dbg_pf_init(pf);

        /* tell the firmware that we're starting */
        i40e_send_version(pf);

        /* since everything's happy, start the service_task timer */
        mod_timer(&pf->service_timer,
                  round_jiffies(jiffies + pf->service_timer_period));

        /* add this PF to client device list and launch a client service task */
        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                err = i40e_lan_add_device(pf);
                if (err)
                        dev_info(&pdev->dev, "Failed to add PF to client API service list: %d\n",
                                 err);
        }

#define PCI_SPEED_SIZE 8
#define PCI_WIDTH_SIZE 8
        /* Devices on the IOSF bus do not have this information
         * and will report PCI Gen 1 x 1 by default so don't bother
         * checking them.
         */
        if (!(pf->hw_features & I40E_HW_NO_PCI_LINK_CHECK)) {
                char speed[PCI_SPEED_SIZE] = "Unknown";
                char width[PCI_WIDTH_SIZE] = "Unknown";

                /* Get the negotiated link width and speed from PCI config
                 * space
                 */
                pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA,
                                          &link_status);

                i40e_set_pci_config_data(hw, link_status);

                switch (hw->bus.speed) {
                case i40e_bus_speed_8000:
                        strncpy(speed, "8.0", PCI_SPEED_SIZE); break;
                case i40e_bus_speed_5000:
                        strncpy(speed, "5.0", PCI_SPEED_SIZE); break;
                case i40e_bus_speed_2500:
                        strncpy(speed, "2.5", PCI_SPEED_SIZE); break;
                default:
                        break;
                }
                switch (hw->bus.width) {
                case i40e_bus_width_pcie_x8:
                        strncpy(width, "8", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x4:
                        strncpy(width, "4", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x2:
                        strncpy(width, "2", PCI_WIDTH_SIZE); break;
                case i40e_bus_width_pcie_x1:
                        strncpy(width, "1", PCI_WIDTH_SIZE); break;
                default:
                        break;
                }

                dev_info(&pdev->dev, "PCI-Express: Speed %sGT/s Width x%s\n",
                         speed, width);

                if (hw->bus.width < i40e_bus_width_pcie_x8 ||
                    hw->bus.speed < i40e_bus_speed_8000) {
                        dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
                        dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
                }
        }

        /* get the requested speeds from the fw */
        err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities, NULL);
        if (err)
                dev_dbg(&pf->pdev->dev, "get requested speeds ret =  %s last_status =  %s\n",
                        i40e_stat_str(&pf->hw, err),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
        pf->hw.phy.link_info.requested_speeds = abilities.link_speed;

        /* get the supported phy types from the fw */
        err = i40e_aq_get_phy_capabilities(hw, false, true, &abilities, NULL);
        if (err)
                dev_dbg(&pf->pdev->dev, "get supported phy types ret =  %s last_status =  %s\n",
                        i40e_stat_str(&pf->hw, err),
                        i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));

        /* Add a filter to drop all Flow control frames from any VSI from being
         * transmitted. By doing so we stop a malicious VF from sending out
         * PAUSE or PFC frames and potentially controlling traffic for other
         * PF/VF VSIs.
         * The FW can still send Flow control frames if enabled.
         */
        i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
                                                       pf->main_vsi_seid);

        if ((pf->hw.device_id == I40E_DEV_ID_10G_BASE_T) ||
                (pf->hw.device_id == I40E_DEV_ID_10G_BASE_T4))
                pf->hw_features |= I40E_HW_PHY_CONTROLS_LEDS;
        if (pf->hw.device_id == I40E_DEV_ID_SFP_I_X722)
                pf->hw_features |= I40E_HW_HAVE_CRT_RETIMER;
        /* print a string summarizing features */
        i40e_print_features(pf);

        return 0;

        /* Unwind what we've done if something failed in the setup */
err_vsis:
        set_bit(__I40E_DOWN, pf->state);
        i40e_clear_interrupt_scheme(pf);
        kfree(pf->vsi);
err_switch_setup:
        i40e_reset_interrupt_capability(pf);
        del_timer_sync(&pf->service_timer);
err_mac_addr:
err_configure_lan_hmc:
        (void)i40e_shutdown_lan_hmc(hw);
err_init_lan_hmc:
        kfree(pf->qp_pile);
err_sw_init:
err_adminq_setup:
err_pf_reset:
        iounmap(hw->hw_addr);
err_ioremap:
        kfree(pf);
err_pf_alloc:
        pci_disable_pcie_error_reporting(pdev);
        pci_release_mem_regions(pdev);
err_pci_reg:
err_dma:
        pci_disable_device(pdev);
        return err;
}

/**
 * i40e_remove - Device removal routine
 * @pdev: PCI device information struct
 *
 * i40e_remove is called by the PCI subsystem to alert the driver
 * that is should release a PCI device.  This could be caused by a
 * Hot-Plug event, or because the driver is going to be removed from
 * memory.
 **/
static void i40e_remove(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret_code;
        int i;

        i40e_dbg_pf_exit(pf);

        i40e_ptp_stop(pf);

        /* Disable RSS in hw */
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), 0);
        i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), 0);

        /* no more scheduling of any task */
        set_bit(__I40E_SUSPENDED, pf->state);
        set_bit(__I40E_DOWN, pf->state);
        if (pf->service_timer.data)
                del_timer_sync(&pf->service_timer);
        if (pf->service_task.func)
                cancel_work_sync(&pf->service_task);

        /* Client close must be called explicitly here because the timer
         * has been stopped.
         */
        i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], false);

        if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
                i40e_free_vfs(pf);
                pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
        }

        i40e_fdir_teardown(pf);

        /* If there is a switch structure or any orphans, remove them.
         * This will leave only the PF's VSI remaining.
         */
        for (i = 0; i < I40E_MAX_VEB; i++) {
                if (!pf->veb[i])
                        continue;

                if (pf->veb[i]->uplink_seid == pf->mac_seid ||
                    pf->veb[i]->uplink_seid == 0)
                        i40e_switch_branch_release(pf->veb[i]);
        }

        /* Now we can shutdown the PF's VSI, just before we kill
         * adminq and hmc.
         */
        if (pf->vsi[pf->lan_vsi])
                i40e_vsi_release(pf->vsi[pf->lan_vsi]);

        /* remove attached clients */
        if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
                ret_code = i40e_lan_del_device(pf);
                if (ret_code)
                        dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
                                 ret_code);
        }

        /* shutdown and destroy the HMC */
        if (hw->hmc.hmc_obj) {
                ret_code = i40e_shutdown_lan_hmc(hw);
                if (ret_code)
                        dev_warn(&pdev->dev,
                                 "Failed to destroy the HMC resources: %d\n",
                                 ret_code);
        }

        /* shutdown the adminq */
        i40e_shutdown_adminq(hw);

        /* destroy the locks only once, here */
        mutex_destroy(&hw->aq.arq_mutex);
        mutex_destroy(&hw->aq.asq_mutex);

        /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
        i40e_clear_interrupt_scheme(pf);
        for (i = 0; i < pf->num_alloc_vsi; i++) {
                if (pf->vsi[i]) {
                        i40e_vsi_clear_rings(pf->vsi[i]);
                        i40e_vsi_clear(pf->vsi[i]);
                        pf->vsi[i] = NULL;
                }
        }

        for (i = 0; i < I40E_MAX_VEB; i++) {
                kfree(pf->veb[i]);
                pf->veb[i] = NULL;
        }

        kfree(pf->qp_pile);
        kfree(pf->vsi);

        iounmap(hw->hw_addr);
        kfree(pf);
        pci_release_mem_regions(pdev);

        pci_disable_pcie_error_reporting(pdev);
        pci_disable_device(pdev);
}

/**
 * i40e_pci_error_detected - warning that something funky happened in PCI land
 * @pdev: PCI device information struct
 *
 * Called to warn that something happened and the error handling steps
 * are in progress.  Allows the driver to quiesce things, be ready for
 * remediation.
 **/
static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
                                                enum pci_channel_state error)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        dev_info(&pdev->dev, "%s: error %d\n", __func__, error);

        if (!pf) {
                dev_info(&pdev->dev,
                         "Cannot recover - error happened during device probe\n");
                return PCI_ERS_RESULT_DISCONNECT;
        }

        /* shutdown all operations */
        if (!test_bit(__I40E_SUSPENDED, pf->state))
                i40e_prep_for_reset(pf, false);

        /* Request a slot reset */
        return PCI_ERS_RESULT_NEED_RESET;
}

/**
 * i40e_pci_error_slot_reset - a PCI slot reset just happened
 * @pdev: PCI device information struct
 *
 * Called to find if the driver can work with the device now that
 * the pci slot has been reset.  If a basic connection seems good
 * (registers are readable and have sane content) then return a
 * happy little PCI_ERS_RESULT_xxx.
 **/
static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        pci_ers_result_t result;
        int err;
        u32 reg;

        dev_dbg(&pdev->dev, "%s\n", __func__);
        if (pci_enable_device_mem(pdev)) {
                dev_info(&pdev->dev,
                         "Cannot re-enable PCI device after reset.\n");
                result = PCI_ERS_RESULT_DISCONNECT;
        } else {
                pci_set_master(pdev);
                pci_restore_state(pdev);
                pci_save_state(pdev);
                pci_wake_from_d3(pdev, false);

                reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
                if (reg == 0)
                        result = PCI_ERS_RESULT_RECOVERED;
                else
                        result = PCI_ERS_RESULT_DISCONNECT;
        }

        err = pci_cleanup_aer_uncorrect_error_status(pdev);
        if (err) {
                dev_info(&pdev->dev,
                         "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
                         err);
                /* non-fatal, continue */
        }

        return result;
}

/**
 * i40e_pci_error_resume - restart operations after PCI error recovery
 * @pdev: PCI device information struct
 *
 * Called to allow the driver to bring things back up after PCI error
 * and/or reset recovery has finished.
 **/
static void i40e_pci_error_resume(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);

        dev_dbg(&pdev->dev, "%s\n", __func__);
        if (test_bit(__I40E_SUSPENDED, pf->state))
                return;

        i40e_handle_reset_warning(pf, false);
}

/**
 * i40e_enable_mc_magic_wake - enable multicast magic packet wake up
 * using the mac_address_write admin q function
 * @pf: pointer to i40e_pf struct
 **/
static void i40e_enable_mc_magic_wake(struct i40e_pf *pf)
{
        struct i40e_hw *hw = &pf->hw;
        i40e_status ret;
        u8 mac_addr[6];
        u16 flags = 0;

        /* Get current MAC address in case it's an LAA */
        if (pf->vsi[pf->lan_vsi] && pf->vsi[pf->lan_vsi]->netdev) {
                ether_addr_copy(mac_addr,
                                pf->vsi[pf->lan_vsi]->netdev->dev_addr);
        } else {
                dev_err(&pf->pdev->dev,
                        "Failed to retrieve MAC address; using default\n");
                ether_addr_copy(mac_addr, hw->mac.addr);
        }

        /* The FW expects the mac address write cmd to first be called with
         * one of these flags before calling it again with the multicast
         * enable flags.
         */
        flags = I40E_AQC_WRITE_TYPE_LAA_WOL;

        if (hw->func_caps.flex10_enable && hw->partition_id != 1)
                flags = I40E_AQC_WRITE_TYPE_LAA_ONLY;

        ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
        if (ret) {
                dev_err(&pf->pdev->dev,
                        "Failed to update MAC address registers; cannot enable Multicast Magic packet wake up");
                return;
        }

        flags = I40E_AQC_MC_MAG_EN
                        | I40E_AQC_WOL_PRESERVE_ON_PFR
                        | I40E_AQC_WRITE_TYPE_UPDATE_MC_MAG;
        ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
        if (ret)
                dev_err(&pf->pdev->dev,
                        "Failed to enable Multicast Magic Packet wake up\n");
}

/**
 * i40e_shutdown - PCI callback for shutting down
 * @pdev: PCI device information struct
 **/
static void i40e_shutdown(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        struct i40e_hw *hw = &pf->hw;

        set_bit(__I40E_SUSPENDED, pf->state);
        set_bit(__I40E_DOWN, pf->state);
        rtnl_lock();
        i40e_prep_for_reset(pf, true);
        rtnl_unlock();

        wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
        wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));

        del_timer_sync(&pf->service_timer);
        cancel_work_sync(&pf->service_task);
        i40e_fdir_teardown(pf);

        /* Client close must be called explicitly here because the timer
         * has been stopped.
         */
        i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], false);

        if (pf->wol_en && (pf->hw_features & I40E_HW_WOL_MC_MAGIC_PKT_WAKE))
                i40e_enable_mc_magic_wake(pf);

        i40e_prep_for_reset(pf, false);

        wr32(hw, I40E_PFPM_APM,
             (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
        wr32(hw, I40E_PFPM_WUFC,
             (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));

        i40e_clear_interrupt_scheme(pf);

        if (system_state == SYSTEM_POWER_OFF) {
                pci_wake_from_d3(pdev, pf->wol_en);
                pci_set_power_state(pdev, PCI_D3hot);
        }
}

#ifdef CONFIG_PM
/**
 * i40e_suspend - PCI callback for moving to D3
 * @pdev: PCI device information struct
 **/
static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        struct i40e_hw *hw = &pf->hw;
        int retval = 0;

        set_bit(__I40E_SUSPENDED, pf->state);
        set_bit(__I40E_DOWN, pf->state);

        if (pf->wol_en && (pf->hw_features & I40E_HW_WOL_MC_MAGIC_PKT_WAKE))
                i40e_enable_mc_magic_wake(pf);

        i40e_prep_for_reset(pf, false);

        wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
        wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));

        i40e_stop_misc_vector(pf);
        if (pf->msix_entries) {
                synchronize_irq(pf->msix_entries[0].vector);
                free_irq(pf->msix_entries[0].vector, pf);
        }
        retval = pci_save_state(pdev);
        if (retval)
                return retval;

        pci_wake_from_d3(pdev, pf->wol_en);
        pci_set_power_state(pdev, PCI_D3hot);

        return retval;
}

/**
 * i40e_resume - PCI callback for waking up from D3
 * @pdev: PCI device information struct
 **/
static int i40e_resume(struct pci_dev *pdev)
{
        struct i40e_pf *pf = pci_get_drvdata(pdev);
        u32 err;

        pci_set_power_state(pdev, PCI_D0);
        pci_restore_state(pdev);
        /* pci_restore_state() clears dev->state_saves, so
         * call pci_save_state() again to restore it.
         */
        pci_save_state(pdev);

        err = pci_enable_device_mem(pdev);
        if (err) {
                dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
                return err;
        }
        pci_set_master(pdev);

        /* no wakeup events while running */
        pci_wake_from_d3(pdev, false);

        /* handling the reset will rebuild the device state */
        if (test_and_clear_bit(__I40E_SUSPENDED, pf->state)) {
                clear_bit(__I40E_DOWN, pf->state);
                if (pf->msix_entries) {
                        err = request_irq(pf->msix_entries[0].vector,
                                          i40e_intr, 0, pf->int_name, pf);
                        if (err) {
                                dev_err(&pf->pdev->dev,
                                        "request_irq for %s failed: %d\n",
                                        pf->int_name, err);
                        }
                }
                i40e_reset_and_rebuild(pf, false, false);
        }

        return 0;
}

#endif
static const struct pci_error_handlers i40e_err_handler = {
        .error_detected = i40e_pci_error_detected,
        .slot_reset = i40e_pci_error_slot_reset,
        .resume = i40e_pci_error_resume,
};

static struct pci_driver i40e_driver = {
        .name     = i40e_driver_name,
        .id_table = i40e_pci_tbl,
        .probe    = i40e_probe,
        .remove   = i40e_remove,
#ifdef CONFIG_PM
        .suspend  = i40e_suspend,
        .resume   = i40e_resume,
#endif
        .shutdown = i40e_shutdown,
        .err_handler = &i40e_err_handler,
        .sriov_configure = i40e_pci_sriov_configure,
};

/**
 * i40e_init_module - Driver registration routine
 *
 * i40e_init_module is the first routine called when the driver is
 * loaded. All it does is register with the PCI subsystem.
 **/
static int __init i40e_init_module(void)
{
        pr_info("%s: %s - version %s\n", i40e_driver_name,
                i40e_driver_string, i40e_driver_version_str);
        pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);

        /* There is no need to throttle the number of active tasks because
         * each device limits its own task using a state bit for scheduling
         * the service task, and the device tasks do not interfere with each
         * other, so we don't set a max task limit. We must set WQ_MEM_RECLAIM
         * since we need to be able to guarantee forward progress even under
         * memory pressure.
         */
        i40e_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0, i40e_driver_name);
        if (!i40e_wq) {
                pr_err("%s: Failed to create workqueue\n", i40e_driver_name);
                return -ENOMEM;
        }

        i40e_dbg_init();
        return pci_register_driver(&i40e_driver);
}
module_init(i40e_init_module);

/**
 * i40e_exit_module - Driver exit cleanup routine
 *
 * i40e_exit_module is called just before the driver is removed
 * from memory.
 **/
static void __exit i40e_exit_module(void)
{
        pci_unregister_driver(&i40e_driver);
        destroy_workqueue(i40e_wq);
        i40e_dbg_exit();
}
module_exit(i40e_exit_module);