From 0a7fb11c23c0fb8f5ad37f285f40348f1ab9ccbd Mon Sep 17 00:00:00 2001 From: Yuval Mintz Date: Sat, 1 Oct 2016 21:59:55 +0300 Subject: [PATCH] qed: Add Light L2 support Other protocols beside the networking driver need the ability of passing some L2 traffic, usually [although not limited] for the purpose of some management traffic. Signed-off-by: Yuval Mintz Signed-off-by: Ram Amrani Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/Kconfig | 8 + drivers/net/ethernet/qlogic/qed/Makefile | 1 + drivers/net/ethernet/qlogic/qed/qed.h | 9 + drivers/net/ethernet/qlogic/qed/qed_cxt.c | 2 + drivers/net/ethernet/qlogic/qed/qed_dev.c | 120 +- drivers/net/ethernet/qlogic/qed/qed_dev_api.h | 20 + drivers/net/ethernet/qlogic/qed/qed_ll2.c | 1699 +++++++++++++++++ drivers/net/ethernet/qlogic/qed/qed_ll2.h | 289 +++ drivers/net/ethernet/qlogic/qed/qed_main.c | 23 +- .../net/ethernet/qlogic/qed/qed_reg_addr.h | 22 + drivers/net/ethernet/qlogic/qed/qed_sp.h | 4 + include/linux/qed/qed_if.h | 1 + include/linux/qed/qed_ll2_if.h | 139 ++ 13 files changed, 2334 insertions(+), 3 deletions(-) create mode 100644 drivers/net/ethernet/qlogic/qed/qed_ll2.c create mode 100644 drivers/net/ethernet/qlogic/qed/qed_ll2.h create mode 100644 include/linux/qed/qed_ll2_if.h diff --git a/drivers/net/ethernet/qlogic/Kconfig b/drivers/net/ethernet/qlogic/Kconfig index 6ba48406899e..9eb3b1914cf5 100644 --- a/drivers/net/ethernet/qlogic/Kconfig +++ b/drivers/net/ethernet/qlogic/Kconfig @@ -88,6 +88,14 @@ config QED ---help--- This enables the support for ... +config QED_LL2 + bool "Qlogic QED Light L2 interface" + default n + depends on QED + ---help--- + This enables support for Light L2 interface which is required + by all qed protocol drivers other than qede. + config QED_SRIOV bool "QLogic QED 25/40/100Gb SR-IOV support" depends on QED && PCI_IOV diff --git a/drivers/net/ethernet/qlogic/qed/Makefile b/drivers/net/ethernet/qlogic/qed/Makefile index 86a5b4f5f870..e067098f10a9 100644 --- a/drivers/net/ethernet/qlogic/qed/Makefile +++ b/drivers/net/ethernet/qlogic/qed/Makefile @@ -4,3 +4,4 @@ qed-y := qed_cxt.o qed_dev.o qed_hw.o qed_init_fw_funcs.o qed_init_ops.o \ qed_int.o qed_main.o qed_mcp.o qed_sp_commands.o qed_spq.o qed_l2.o \ qed_selftest.o qed_dcbx.o qed_debug.o qed-$(CONFIG_QED_SRIOV) += qed_sriov.o qed_vf.o +qed-$(CONFIG_QED_LL2) += qed_ll2.o diff --git a/drivers/net/ethernet/qlogic/qed/qed.h b/drivers/net/ethernet/qlogic/qed/qed.h index 0929582fc82b..91b571a3670b 100644 --- a/drivers/net/ethernet/qlogic/qed/qed.h +++ b/drivers/net/ethernet/qlogic/qed/qed.h @@ -72,6 +72,7 @@ struct qed_sb_info; struct qed_sb_attn_info; struct qed_cxt_mngr; struct qed_sb_sp_info; +struct qed_ll2_info; struct qed_mcp_info; struct qed_rt_data { @@ -152,6 +153,7 @@ enum QED_RESOURCES { QED_MAC, QED_VLAN, QED_ILT, + QED_LL2_QUEUE, QED_MAX_RESC, }; @@ -360,6 +362,8 @@ struct qed_hwfn { struct qed_sb_attn_info *p_sb_attn; /* Protocol related */ + bool using_ll2; + struct qed_ll2_info *p_ll2_info; struct qed_pf_params pf_params; bool b_rdma_enabled_in_prs; @@ -564,6 +568,11 @@ struct qed_dev { struct qed_dbg_params dbg_params; +#ifdef CONFIG_QED_LL2 + struct qed_cb_ll2_info *ll2; + u8 ll2_mac_address[ETH_ALEN]; +#endif + const struct firmware *firmware; }; diff --git a/drivers/net/ethernet/qlogic/qed/qed_cxt.c b/drivers/net/ethernet/qlogic/qed/qed_cxt.c index dd579b2ef224..d9bea2a9c9f7 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_cxt.c +++ b/drivers/net/ethernet/qlogic/qed/qed_cxt.c @@ -1839,6 +1839,8 @@ int qed_cxt_set_pf_params(struct qed_hwfn *p_hwfn) /* Set the number of required CORE connections */ u32 core_cids = 1; /* SPQ */ + if (p_hwfn->using_ll2) + core_cids += 4; qed_cxt_set_proto_cid_count(p_hwfn, PROTOCOLID_CORE, core_cids, 0); switch (p_hwfn->hw_info.personality) { diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c index 13d8b4075b01..9a8e153df841 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_dev.c +++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c @@ -29,6 +29,7 @@ #include "qed_hw.h" #include "qed_init_ops.h" #include "qed_int.h" +#include "qed_ll2.h" #include "qed_mcp.h" #include "qed_reg_addr.h" #include "qed_sp.h" @@ -147,6 +148,9 @@ void qed_resc_free(struct qed_dev *cdev) qed_eq_free(p_hwfn, p_hwfn->p_eq); qed_consq_free(p_hwfn, p_hwfn->p_consq); qed_int_free(p_hwfn); +#ifdef CONFIG_QED_LL2 + qed_ll2_free(p_hwfn, p_hwfn->p_ll2_info); +#endif qed_iov_free(p_hwfn); qed_dmae_info_free(p_hwfn); qed_dcbx_info_free(p_hwfn, p_hwfn->p_dcbx_info); @@ -403,6 +407,9 @@ int qed_qm_reconf(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt) int qed_resc_alloc(struct qed_dev *cdev) { +#ifdef CONFIG_QED_LL2 + struct qed_ll2_info *p_ll2_info; +#endif struct qed_consq *p_consq; struct qed_eq *p_eq; int i, rc = 0; @@ -513,6 +520,15 @@ int qed_resc_alloc(struct qed_dev *cdev) goto alloc_no_mem; p_hwfn->p_consq = p_consq; +#ifdef CONFIG_QED_LL2 + if (p_hwfn->using_ll2) { + p_ll2_info = qed_ll2_alloc(p_hwfn); + if (!p_ll2_info) + goto alloc_no_mem; + p_hwfn->p_ll2_info = p_ll2_info; + } +#endif + /* DMA info initialization */ rc = qed_dmae_info_alloc(p_hwfn); if (rc) @@ -561,6 +577,10 @@ void qed_resc_setup(struct qed_dev *cdev) qed_int_setup(p_hwfn, p_hwfn->p_main_ptt); qed_iov_setup(p_hwfn, p_hwfn->p_main_ptt); +#ifdef CONFIG_QED_LL2 + if (p_hwfn->using_ll2) + qed_ll2_setup(p_hwfn, p_hwfn->p_ll2_info); +#endif } } @@ -1304,6 +1324,7 @@ static int qed_hw_get_resc(struct qed_hwfn *p_hwfn) resc_num[QED_VLAN] = (ETH_NUM_VLAN_FILTERS - 1 /*For vlan0*/) / num_funcs; resc_num[QED_ILT] = PXP_NUM_ILT_RECORDS_BB / num_funcs; + resc_num[QED_LL2_QUEUE] = MAX_NUM_LL2_RX_QUEUES / num_funcs; for (i = 0; i < QED_MAX_RESC; i++) resc_start[i] = resc_num[i] * enabled_func_idx; @@ -1327,7 +1348,8 @@ static int qed_hw_get_resc(struct qed_hwfn *p_hwfn) "RL = %d start = %d\n" "MAC = %d start = %d\n" "VLAN = %d start = %d\n" - "ILT = %d start = %d\n", + "ILT = %d start = %d\n" + "LL2_QUEUE = %d start = %d\n", p_hwfn->hw_info.resc_num[QED_SB], p_hwfn->hw_info.resc_start[QED_SB], p_hwfn->hw_info.resc_num[QED_L2_QUEUE], @@ -1343,7 +1365,9 @@ static int qed_hw_get_resc(struct qed_hwfn *p_hwfn) p_hwfn->hw_info.resc_num[QED_VLAN], p_hwfn->hw_info.resc_start[QED_VLAN], p_hwfn->hw_info.resc_num[QED_ILT], - p_hwfn->hw_info.resc_start[QED_ILT]); + p_hwfn->hw_info.resc_start[QED_ILT], + RESC_NUM(p_hwfn, QED_LL2_QUEUE), + RESC_START(p_hwfn, QED_LL2_QUEUE)); return 0; } @@ -2133,6 +2157,98 @@ int qed_fw_rss_eng(struct qed_hwfn *p_hwfn, u8 src_id, u8 *dst_id) return 0; } +static void qed_llh_mac_to_filter(u32 *p_high, u32 *p_low, + u8 *p_filter) +{ + *p_high = p_filter[1] | (p_filter[0] << 8); + *p_low = p_filter[5] | (p_filter[4] << 8) | + (p_filter[3] << 16) | (p_filter[2] << 24); +} + +int qed_llh_add_mac_filter(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, u8 *p_filter) +{ + u32 high = 0, low = 0, en; + int i; + + if (!(IS_MF_SI(p_hwfn) || IS_MF_DEFAULT(p_hwfn))) + return 0; + + qed_llh_mac_to_filter(&high, &low, p_filter); + + /* Find a free entry and utilize it */ + for (i = 0; i < NIG_REG_LLH_FUNC_FILTER_EN_SIZE; i++) { + en = qed_rd(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32)); + if (en) + continue; + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + + 2 * i * sizeof(u32), low); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + + (2 * i + 1) * sizeof(u32), high); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_MODE + i * sizeof(u32), 0); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE + + i * sizeof(u32), 0); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32), 1); + break; + } + if (i >= NIG_REG_LLH_FUNC_FILTER_EN_SIZE) { + DP_NOTICE(p_hwfn, + "Failed to find an empty LLH filter to utilize\n"); + return -EINVAL; + } + + DP_VERBOSE(p_hwfn, NETIF_MSG_HW, + "mac: %pM is added at %d\n", + p_filter, i); + + return 0; +} + +void qed_llh_remove_mac_filter(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, u8 *p_filter) +{ + u32 high = 0, low = 0; + int i; + + if (!(IS_MF_SI(p_hwfn) || IS_MF_DEFAULT(p_hwfn))) + return; + + qed_llh_mac_to_filter(&high, &low, p_filter); + + /* Find the entry and clean it */ + for (i = 0; i < NIG_REG_LLH_FUNC_FILTER_EN_SIZE; i++) { + if (qed_rd(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + + 2 * i * sizeof(u32)) != low) + continue; + if (qed_rd(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + + (2 * i + 1) * sizeof(u32)) != high) + continue; + + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_EN + i * sizeof(u32), 0); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + 2 * i * sizeof(u32), 0); + qed_wr(p_hwfn, p_ptt, + NIG_REG_LLH_FUNC_FILTER_VALUE + + (2 * i + 1) * sizeof(u32), 0); + + DP_VERBOSE(p_hwfn, NETIF_MSG_HW, + "mac: %pM is removed from %d\n", + p_filter, i); + break; + } + if (i >= NIG_REG_LLH_FUNC_FILTER_EN_SIZE) + DP_NOTICE(p_hwfn, "Tried to remove a non-configured filter\n"); +} + static int qed_set_coalesce(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt, u32 hw_addr, void *p_eth_qzone, size_t eth_qzone_size, u8 timeset) diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h index 343bb0344f62..b6711c106597 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_dev_api.h +++ b/drivers/net/ethernet/qlogic/qed/qed_dev_api.h @@ -309,6 +309,26 @@ int qed_fw_rss_eng(struct qed_hwfn *p_hwfn, u8 src_id, u8 *dst_id); +/** + * @brief qed_llh_add_mac_filter - configures a MAC filter in llh + * + * @param p_hwfn + * @param p_ptt + * @param p_filter - MAC to add + */ +int qed_llh_add_mac_filter(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, u8 *p_filter); + +/** + * @brief qed_llh_remove_mac_filter - removes a MAC filter from llh + * + * @param p_hwfn + * @param p_ptt + * @param p_filter - MAC to remove + */ +void qed_llh_remove_mac_filter(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, u8 *p_filter); + /** * *@brief Cleanup of previous driver remains prior to load * diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.c b/drivers/net/ethernet/qlogic/qed/qed_ll2.c new file mode 100644 index 000000000000..e0ec8ed2f92c --- /dev/null +++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.c @@ -0,0 +1,1699 @@ +/* QLogic qed NIC Driver + * + * Copyright (c) 2015 QLogic Corporation + * + * This software is available under the terms of the GNU General Public License + * (GPL) Version 2, available from the file COPYING in the main directory of + * this source tree. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "qed.h" +#include "qed_cxt.h" +#include "qed_dev_api.h" +#include "qed_hsi.h" +#include "qed_hw.h" +#include "qed_int.h" +#include "qed_ll2.h" +#include "qed_mcp.h" +#include "qed_reg_addr.h" +#include "qed_sp.h" + +#define QED_LL2_RX_REGISTERED(ll2) ((ll2)->rx_queue.b_cb_registred) +#define QED_LL2_TX_REGISTERED(ll2) ((ll2)->tx_queue.b_cb_registred) + +#define QED_LL2_TX_SIZE (256) +#define QED_LL2_RX_SIZE (4096) + +struct qed_cb_ll2_info { + int rx_cnt; + u32 rx_size; + u8 handle; + bool frags_mapped; + + /* Lock protecting LL2 buffer lists in sleepless context */ + spinlock_t lock; + struct list_head list; + + const struct qed_ll2_cb_ops *cbs; + void *cb_cookie; +}; + +struct qed_ll2_buffer { + struct list_head list; + void *data; + dma_addr_t phys_addr; +}; + +static void qed_ll2b_complete_tx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + void *cookie, + dma_addr_t first_frag_addr, + bool b_last_fragment, + bool b_last_packet) +{ + struct qed_dev *cdev = p_hwfn->cdev; + struct sk_buff *skb = cookie; + + /* All we need to do is release the mapping */ + dma_unmap_single(&p_hwfn->cdev->pdev->dev, first_frag_addr, + skb_headlen(skb), DMA_TO_DEVICE); + + if (cdev->ll2->cbs && cdev->ll2->cbs->tx_cb) + cdev->ll2->cbs->tx_cb(cdev->ll2->cb_cookie, skb, + b_last_fragment); + + if (cdev->ll2->frags_mapped) + /* Case where mapped frags were received, need to + * free skb with nr_frags marked as 0 + */ + skb_shinfo(skb)->nr_frags = 0; + + dev_kfree_skb_any(skb); +} + +static int qed_ll2_alloc_buffer(struct qed_dev *cdev, + u8 **data, dma_addr_t *phys_addr) +{ + *data = kmalloc(cdev->ll2->rx_size, GFP_ATOMIC); + if (!(*data)) { + DP_INFO(cdev, "Failed to allocate LL2 buffer data\n"); + return -ENOMEM; + } + + *phys_addr = dma_map_single(&cdev->pdev->dev, + ((*data) + NET_SKB_PAD), + cdev->ll2->rx_size, DMA_FROM_DEVICE); + if (dma_mapping_error(&cdev->pdev->dev, *phys_addr)) { + DP_INFO(cdev, "Failed to map LL2 buffer data\n"); + kfree((*data)); + return -ENOMEM; + } + + return 0; +} + +static int qed_ll2_dealloc_buffer(struct qed_dev *cdev, + struct qed_ll2_buffer *buffer) +{ + spin_lock_bh(&cdev->ll2->lock); + + dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, + cdev->ll2->rx_size, DMA_FROM_DEVICE); + kfree(buffer->data); + list_del(&buffer->list); + + cdev->ll2->rx_cnt--; + if (!cdev->ll2->rx_cnt) + DP_INFO(cdev, "All LL2 entries were removed\n"); + + spin_unlock_bh(&cdev->ll2->lock); + + return 0; +} + +static void qed_ll2_kill_buffers(struct qed_dev *cdev) +{ + struct qed_ll2_buffer *buffer, *tmp_buffer; + + list_for_each_entry_safe(buffer, tmp_buffer, &cdev->ll2->list, list) + qed_ll2_dealloc_buffer(cdev, buffer); +} + +void qed_ll2b_complete_rx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + struct qed_ll2_rx_packet *p_pkt, + struct core_rx_fast_path_cqe *p_cqe, + bool b_last_packet) +{ + u16 packet_length = le16_to_cpu(p_cqe->packet_length); + struct qed_ll2_buffer *buffer = p_pkt->cookie; + struct qed_dev *cdev = p_hwfn->cdev; + u16 vlan = le16_to_cpu(p_cqe->vlan); + u32 opaque_data_0, opaque_data_1; + u8 pad = p_cqe->placement_offset; + dma_addr_t new_phys_addr; + struct sk_buff *skb; + bool reuse = false; + int rc = -EINVAL; + u8 *new_data; + + opaque_data_0 = le32_to_cpu(p_cqe->opaque_data.data[0]); + opaque_data_1 = le32_to_cpu(p_cqe->opaque_data.data[1]); + + DP_VERBOSE(p_hwfn, + (NETIF_MSG_RX_STATUS | QED_MSG_STORAGE | NETIF_MSG_PKTDATA), + "Got an LL2 Rx completion: [Buffer at phys 0x%llx, offset 0x%02x] Length 0x%04x Parse_flags 0x%04x vlan 0x%04x Opaque data [0x%08x:0x%08x]\n", + (u64)p_pkt->rx_buf_addr, pad, packet_length, + le16_to_cpu(p_cqe->parse_flags.flags), vlan, + opaque_data_0, opaque_data_1); + + if ((cdev->dp_module & NETIF_MSG_PKTDATA) && buffer->data) { + print_hex_dump(KERN_INFO, "", + DUMP_PREFIX_OFFSET, 16, 1, + buffer->data, packet_length, false); + } + + /* Determine if data is valid */ + if (packet_length < ETH_HLEN) + reuse = true; + + /* Allocate a replacement for buffer; Reuse upon failure */ + if (!reuse) + rc = qed_ll2_alloc_buffer(p_hwfn->cdev, &new_data, + &new_phys_addr); + + /* If need to reuse or there's no replacement buffer, repost this */ + if (rc) + goto out_post; + + skb = build_skb(buffer->data, 0); + if (!skb) { + rc = -ENOMEM; + goto out_post; + } + + pad += NET_SKB_PAD; + skb_reserve(skb, pad); + skb_put(skb, packet_length); + skb_checksum_none_assert(skb); + + /* Get parital ethernet information instead of eth_type_trans(), + * Since we don't have an associated net_device. + */ + skb_reset_mac_header(skb); + skb->protocol = eth_hdr(skb)->h_proto; + + /* Pass SKB onward */ + if (cdev->ll2->cbs && cdev->ll2->cbs->rx_cb) { + if (vlan) + __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan); + cdev->ll2->cbs->rx_cb(cdev->ll2->cb_cookie, skb, + opaque_data_0, opaque_data_1); + } + + /* Update Buffer information and update FW producer */ + buffer->data = new_data; + buffer->phys_addr = new_phys_addr; + +out_post: + rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), cdev->ll2->handle, + buffer->phys_addr, 0, buffer, 1); + + if (rc) + qed_ll2_dealloc_buffer(cdev, buffer); +} + +static struct qed_ll2_info *__qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, + u8 connection_handle, + bool b_lock, + bool b_only_active) +{ + struct qed_ll2_info *p_ll2_conn, *p_ret = NULL; + + if (connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) + return NULL; + + if (!p_hwfn->p_ll2_info) + return NULL; + + p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; + + if (b_only_active) { + if (b_lock) + mutex_lock(&p_ll2_conn->mutex); + if (p_ll2_conn->b_active) + p_ret = p_ll2_conn; + if (b_lock) + mutex_unlock(&p_ll2_conn->mutex); + } else { + p_ret = p_ll2_conn; + } + + return p_ret; +} + +static struct qed_ll2_info *qed_ll2_handle_sanity(struct qed_hwfn *p_hwfn, + u8 connection_handle) +{ + return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, true); +} + +static struct qed_ll2_info *qed_ll2_handle_sanity_lock(struct qed_hwfn *p_hwfn, + u8 connection_handle) +{ + return __qed_ll2_handle_sanity(p_hwfn, connection_handle, true, true); +} + +static struct qed_ll2_info *qed_ll2_handle_sanity_inactive(struct qed_hwfn + *p_hwfn, + u8 connection_handle) +{ + return __qed_ll2_handle_sanity(p_hwfn, connection_handle, false, false); +} + +static void qed_ll2_txq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) +{ + bool b_last_packet = false, b_last_frag = false; + struct qed_ll2_tx_packet *p_pkt = NULL; + struct qed_ll2_info *p_ll2_conn; + struct qed_ll2_tx_queue *p_tx; + + p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); + if (!p_ll2_conn) + return; + + p_tx = &p_ll2_conn->tx_queue; + + while (!list_empty(&p_tx->active_descq)) { + p_pkt = list_first_entry(&p_tx->active_descq, + struct qed_ll2_tx_packet, list_entry); + if (!p_pkt) + break; + + list_del(&p_pkt->list_entry); + b_last_packet = list_empty(&p_tx->active_descq); + list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); + p_tx->cur_completing_packet = *p_pkt; + p_tx->cur_completing_bd_idx = 1; + b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; + + qed_ll2b_complete_tx_packet(p_hwfn, p_ll2_conn->my_id, + p_pkt->cookie, + p_pkt->bds_set[0].tx_frag, + b_last_frag, b_last_packet); + } +} + +static int qed_ll2_txq_completion(struct qed_hwfn *p_hwfn, void *p_cookie) +{ + struct qed_ll2_info *p_ll2_conn = p_cookie; + struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; + u16 new_idx = 0, num_bds = 0, num_bds_in_packet = 0; + struct qed_ll2_tx_packet *p_pkt; + bool b_last_frag = false; + unsigned long flags; + int rc = -EINVAL; + + spin_lock_irqsave(&p_tx->lock, flags); + if (p_tx->b_completing_packet) { + rc = -EBUSY; + goto out; + } + + new_idx = le16_to_cpu(*p_tx->p_fw_cons); + num_bds = ((s16)new_idx - (s16)p_tx->bds_idx); + while (num_bds) { + if (list_empty(&p_tx->active_descq)) + goto out; + + p_pkt = list_first_entry(&p_tx->active_descq, + struct qed_ll2_tx_packet, list_entry); + if (!p_pkt) + goto out; + + p_tx->b_completing_packet = true; + p_tx->cur_completing_packet = *p_pkt; + num_bds_in_packet = p_pkt->bd_used; + list_del(&p_pkt->list_entry); + + if (num_bds < num_bds_in_packet) { + DP_NOTICE(p_hwfn, + "Rest of BDs does not cover whole packet\n"); + goto out; + } + + num_bds -= num_bds_in_packet; + p_tx->bds_idx += num_bds_in_packet; + while (num_bds_in_packet--) + qed_chain_consume(&p_tx->txq_chain); + + p_tx->cur_completing_bd_idx = 1; + b_last_frag = p_tx->cur_completing_bd_idx == p_pkt->bd_used; + list_add_tail(&p_pkt->list_entry, &p_tx->free_descq); + + spin_unlock_irqrestore(&p_tx->lock, flags); + qed_ll2b_complete_tx_packet(p_hwfn, + p_ll2_conn->my_id, + p_pkt->cookie, + p_pkt->bds_set[0].tx_frag, + b_last_frag, !num_bds); + spin_lock_irqsave(&p_tx->lock, flags); + } + + p_tx->b_completing_packet = false; + rc = 0; +out: + spin_unlock_irqrestore(&p_tx->lock, flags); + return rc; +} + +static int qed_ll2_rxq_completion_reg(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn, + union core_rx_cqe_union *p_cqe, + unsigned long lock_flags, + bool b_last_cqe) +{ + struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; + struct qed_ll2_rx_packet *p_pkt = NULL; + + if (!list_empty(&p_rx->active_descq)) + p_pkt = list_first_entry(&p_rx->active_descq, + struct qed_ll2_rx_packet, list_entry); + if (!p_pkt) { + DP_NOTICE(p_hwfn, + "LL2 Rx completion but active_descq is empty\n"); + return -EIO; + } + list_del(&p_pkt->list_entry); + + if (qed_chain_consume(&p_rx->rxq_chain) != p_pkt->rxq_bd) + DP_NOTICE(p_hwfn, + "Mismatch between active_descq and the LL2 Rx chain\n"); + list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); + + spin_unlock_irqrestore(&p_rx->lock, lock_flags); + qed_ll2b_complete_rx_packet(p_hwfn, p_ll2_conn->my_id, + p_pkt, &p_cqe->rx_cqe_fp, b_last_cqe); + spin_lock_irqsave(&p_rx->lock, lock_flags); + + return 0; +} + +static int qed_ll2_rxq_completion(struct qed_hwfn *p_hwfn, void *cookie) +{ + struct qed_ll2_info *p_ll2_conn = cookie; + struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; + union core_rx_cqe_union *cqe = NULL; + u16 cq_new_idx = 0, cq_old_idx = 0; + unsigned long flags = 0; + int rc = 0; + + spin_lock_irqsave(&p_rx->lock, flags); + cq_new_idx = le16_to_cpu(*p_rx->p_fw_cons); + cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); + + while (cq_new_idx != cq_old_idx) { + bool b_last_cqe = (cq_new_idx == cq_old_idx); + + cqe = qed_chain_consume(&p_rx->rcq_chain); + cq_old_idx = qed_chain_get_cons_idx(&p_rx->rcq_chain); + + DP_VERBOSE(p_hwfn, + QED_MSG_LL2, + "LL2 [sw. cons %04x, fw. at %04x] - Got Packet of type %02x\n", + cq_old_idx, cq_new_idx, cqe->rx_cqe_sp.type); + + switch (cqe->rx_cqe_sp.type) { + case CORE_RX_CQE_TYPE_SLOW_PATH: + DP_NOTICE(p_hwfn, "LL2 - unexpected Rx CQE slowpath\n"); + rc = -EINVAL; + break; + case CORE_RX_CQE_TYPE_REGULAR: + rc = qed_ll2_rxq_completion_reg(p_hwfn, p_ll2_conn, + cqe, flags, b_last_cqe); + break; + default: + rc = -EIO; + } + } + + spin_unlock_irqrestore(&p_rx->lock, flags); + return rc; +} + +void qed_ll2_rxq_flush(struct qed_hwfn *p_hwfn, u8 connection_handle) +{ + struct qed_ll2_info *p_ll2_conn = NULL; + struct qed_ll2_rx_packet *p_pkt = NULL; + struct qed_ll2_rx_queue *p_rx; + + p_ll2_conn = qed_ll2_handle_sanity_inactive(p_hwfn, connection_handle); + if (!p_ll2_conn) + return; + + p_rx = &p_ll2_conn->rx_queue; + + while (!list_empty(&p_rx->active_descq)) { + dma_addr_t rx_buf_addr; + void *cookie; + bool b_last; + + p_pkt = list_first_entry(&p_rx->active_descq, + struct qed_ll2_rx_packet, list_entry); + if (!p_pkt) + break; + + list_del(&p_pkt->list_entry); + list_add_tail(&p_pkt->list_entry, &p_rx->free_descq); + + rx_buf_addr = p_pkt->rx_buf_addr; + cookie = p_pkt->cookie; + + b_last = list_empty(&p_rx->active_descq); + } +} + +static int qed_sp_ll2_rx_queue_start(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn, + u8 action_on_error) +{ + enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type; + struct qed_ll2_rx_queue *p_rx = &p_ll2_conn->rx_queue; + struct core_rx_start_ramrod_data *p_ramrod = NULL; + struct qed_spq_entry *p_ent = NULL; + struct qed_sp_init_data init_data; + u16 cqe_pbl_size; + int rc = 0; + + /* Get SPQ entry */ + memset(&init_data, 0, sizeof(init_data)); + init_data.cid = p_ll2_conn->cid; + init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; + init_data.comp_mode = QED_SPQ_MODE_EBLOCK; + + rc = qed_sp_init_request(p_hwfn, &p_ent, + CORE_RAMROD_RX_QUEUE_START, + PROTOCOLID_CORE, &init_data); + if (rc) + return rc; + + p_ramrod = &p_ent->ramrod.core_rx_queue_start; + + p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); + p_ramrod->sb_index = p_rx->rx_sb_index; + p_ramrod->complete_event_flg = 1; + + p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu); + DMA_REGPAIR_LE(p_ramrod->bd_base, + p_rx->rxq_chain.p_phys_addr); + cqe_pbl_size = (u16)qed_chain_get_page_cnt(&p_rx->rcq_chain); + p_ramrod->num_of_pbl_pages = cpu_to_le16(cqe_pbl_size); + DMA_REGPAIR_LE(p_ramrod->cqe_pbl_addr, + qed_chain_get_pbl_phys(&p_rx->rcq_chain)); + + p_ramrod->drop_ttl0_flg = p_ll2_conn->rx_drop_ttl0_flg; + p_ramrod->inner_vlan_removal_en = p_ll2_conn->rx_vlan_removal_en; + p_ramrod->queue_id = p_ll2_conn->queue_id; + p_ramrod->main_func_queue = 1; + + if ((IS_MF_DEFAULT(p_hwfn) || IS_MF_SI(p_hwfn)) && + p_ramrod->main_func_queue && (conn_type != QED_LL2_TYPE_ROCE)) { + p_ramrod->mf_si_bcast_accept_all = 1; + p_ramrod->mf_si_mcast_accept_all = 1; + } else { + p_ramrod->mf_si_bcast_accept_all = 0; + p_ramrod->mf_si_mcast_accept_all = 0; + } + + p_ramrod->action_on_error.error_type = action_on_error; + return qed_spq_post(p_hwfn, p_ent, NULL); +} + +static int qed_sp_ll2_tx_queue_start(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn) +{ + enum qed_ll2_conn_type conn_type = p_ll2_conn->conn_type; + struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; + struct core_tx_start_ramrod_data *p_ramrod = NULL; + struct qed_spq_entry *p_ent = NULL; + struct qed_sp_init_data init_data; + union qed_qm_pq_params pq_params; + u16 pq_id = 0, pbl_size; + int rc = -EINVAL; + + if (!QED_LL2_TX_REGISTERED(p_ll2_conn)) + return 0; + + /* Get SPQ entry */ + memset(&init_data, 0, sizeof(init_data)); + init_data.cid = p_ll2_conn->cid; + init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; + init_data.comp_mode = QED_SPQ_MODE_EBLOCK; + + rc = qed_sp_init_request(p_hwfn, &p_ent, + CORE_RAMROD_TX_QUEUE_START, + PROTOCOLID_CORE, &init_data); + if (rc) + return rc; + + p_ramrod = &p_ent->ramrod.core_tx_queue_start; + + p_ramrod->sb_id = cpu_to_le16(qed_int_get_sp_sb_id(p_hwfn)); + p_ramrod->sb_index = p_tx->tx_sb_index; + p_ramrod->mtu = cpu_to_le16(p_ll2_conn->mtu); + p_ll2_conn->tx_stats_en = 1; + p_ramrod->stats_en = p_ll2_conn->tx_stats_en; + p_ramrod->stats_id = p_ll2_conn->tx_stats_id; + + DMA_REGPAIR_LE(p_ramrod->pbl_base_addr, + qed_chain_get_pbl_phys(&p_tx->txq_chain)); + pbl_size = qed_chain_get_page_cnt(&p_tx->txq_chain); + p_ramrod->pbl_size = cpu_to_le16(pbl_size); + + memset(&pq_params, 0, sizeof(pq_params)); + pq_params.core.tc = p_ll2_conn->tx_tc; + pq_id = qed_get_qm_pq(p_hwfn, PROTOCOLID_CORE, &pq_params); + p_ramrod->qm_pq_id = cpu_to_le16(pq_id); + + switch (conn_type) { + case QED_LL2_TYPE_ISCSI: + case QED_LL2_TYPE_ISCSI_OOO: + p_ramrod->conn_type = PROTOCOLID_ISCSI; + break; + case QED_LL2_TYPE_ROCE: + p_ramrod->conn_type = PROTOCOLID_ROCE; + break; + default: + p_ramrod->conn_type = PROTOCOLID_ETH; + DP_NOTICE(p_hwfn, "Unknown connection type: %d\n", conn_type); + } + + return qed_spq_post(p_hwfn, p_ent, NULL); +} + +static int qed_sp_ll2_rx_queue_stop(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn) +{ + struct core_rx_stop_ramrod_data *p_ramrod = NULL; + struct qed_spq_entry *p_ent = NULL; + struct qed_sp_init_data init_data; + int rc = -EINVAL; + + /* Get SPQ entry */ + memset(&init_data, 0, sizeof(init_data)); + init_data.cid = p_ll2_conn->cid; + init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; + init_data.comp_mode = QED_SPQ_MODE_EBLOCK; + + rc = qed_sp_init_request(p_hwfn, &p_ent, + CORE_RAMROD_RX_QUEUE_STOP, + PROTOCOLID_CORE, &init_data); + if (rc) + return rc; + + p_ramrod = &p_ent->ramrod.core_rx_queue_stop; + + p_ramrod->complete_event_flg = 1; + p_ramrod->queue_id = p_ll2_conn->queue_id; + + return qed_spq_post(p_hwfn, p_ent, NULL); +} + +static int qed_sp_ll2_tx_queue_stop(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn) +{ + struct qed_spq_entry *p_ent = NULL; + struct qed_sp_init_data init_data; + int rc = -EINVAL; + + /* Get SPQ entry */ + memset(&init_data, 0, sizeof(init_data)); + init_data.cid = p_ll2_conn->cid; + init_data.opaque_fid = p_hwfn->hw_info.opaque_fid; + init_data.comp_mode = QED_SPQ_MODE_EBLOCK; + + rc = qed_sp_init_request(p_hwfn, &p_ent, + CORE_RAMROD_TX_QUEUE_STOP, + PROTOCOLID_CORE, &init_data); + if (rc) + return rc; + + return qed_spq_post(p_hwfn, p_ent, NULL); +} + +static int +qed_ll2_acquire_connection_rx(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_info, u16 rx_num_desc) +{ + struct qed_ll2_rx_packet *p_descq; + u32 capacity; + int rc = 0; + + if (!rx_num_desc) + goto out; + + rc = qed_chain_alloc(p_hwfn->cdev, + QED_CHAIN_USE_TO_CONSUME_PRODUCE, + QED_CHAIN_MODE_NEXT_PTR, + QED_CHAIN_CNT_TYPE_U16, + rx_num_desc, + sizeof(struct core_rx_bd), + &p_ll2_info->rx_queue.rxq_chain); + if (rc) { + DP_NOTICE(p_hwfn, "Failed to allocate ll2 rxq chain\n"); + goto out; + } + + capacity = qed_chain_get_capacity(&p_ll2_info->rx_queue.rxq_chain); + p_descq = kcalloc(capacity, sizeof(struct qed_ll2_rx_packet), + GFP_KERNEL); + if (!p_descq) { + rc = -ENOMEM; + DP_NOTICE(p_hwfn, "Failed to allocate ll2 Rx desc\n"); + goto out; + } + p_ll2_info->rx_queue.descq_array = p_descq; + + rc = qed_chain_alloc(p_hwfn->cdev, + QED_CHAIN_USE_TO_CONSUME_PRODUCE, + QED_CHAIN_MODE_PBL, + QED_CHAIN_CNT_TYPE_U16, + rx_num_desc, + sizeof(struct core_rx_fast_path_cqe), + &p_ll2_info->rx_queue.rcq_chain); + if (rc) { + DP_NOTICE(p_hwfn, "Failed to allocate ll2 rcq chain\n"); + goto out; + } + + DP_VERBOSE(p_hwfn, QED_MSG_LL2, + "Allocated LL2 Rxq [Type %08x] with 0x%08x buffers\n", + p_ll2_info->conn_type, rx_num_desc); + +out: + return rc; +} + +static int qed_ll2_acquire_connection_tx(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_info, + u16 tx_num_desc) +{ + struct qed_ll2_tx_packet *p_descq; + u32 capacity; + int rc = 0; + + if (!tx_num_desc) + goto out; + + rc = qed_chain_alloc(p_hwfn->cdev, + QED_CHAIN_USE_TO_CONSUME_PRODUCE, + QED_CHAIN_MODE_PBL, + QED_CHAIN_CNT_TYPE_U16, + tx_num_desc, + sizeof(struct core_tx_bd), + &p_ll2_info->tx_queue.txq_chain); + if (rc) + goto out; + + capacity = qed_chain_get_capacity(&p_ll2_info->tx_queue.txq_chain); + p_descq = kcalloc(capacity, sizeof(struct qed_ll2_tx_packet), + GFP_KERNEL); + if (!p_descq) { + rc = -ENOMEM; + goto out; + } + p_ll2_info->tx_queue.descq_array = p_descq; + + DP_VERBOSE(p_hwfn, QED_MSG_LL2, + "Allocated LL2 Txq [Type %08x] with 0x%08x buffers\n", + p_ll2_info->conn_type, tx_num_desc); + +out: + if (rc) + DP_NOTICE(p_hwfn, + "Can't allocate memory for Tx LL2 with 0x%08x buffers\n", + tx_num_desc); + return rc; +} + +int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_params, + u16 rx_num_desc, + u16 tx_num_desc, + u8 *p_connection_handle) +{ + qed_int_comp_cb_t comp_rx_cb, comp_tx_cb; + struct qed_ll2_info *p_ll2_info = NULL; + int rc; + u8 i; + + if (!p_connection_handle || !p_hwfn->p_ll2_info) + return -EINVAL; + + /* Find a free connection to be used */ + for (i = 0; (i < QED_MAX_NUM_OF_LL2_CONNECTIONS); i++) { + mutex_lock(&p_hwfn->p_ll2_info[i].mutex); + if (p_hwfn->p_ll2_info[i].b_active) { + mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); + continue; + } + + p_hwfn->p_ll2_info[i].b_active = true; + p_ll2_info = &p_hwfn->p_ll2_info[i]; + mutex_unlock(&p_hwfn->p_ll2_info[i].mutex); + break; + } + if (!p_ll2_info) + return -EBUSY; + + p_ll2_info->conn_type = p_params->conn_type; + p_ll2_info->mtu = p_params->mtu; + p_ll2_info->rx_drop_ttl0_flg = p_params->rx_drop_ttl0_flg; + p_ll2_info->rx_vlan_removal_en = p_params->rx_vlan_removal_en; + p_ll2_info->tx_tc = p_params->tx_tc; + p_ll2_info->tx_dest = p_params->tx_dest; + p_ll2_info->ai_err_packet_too_big = p_params->ai_err_packet_too_big; + p_ll2_info->ai_err_no_buf = p_params->ai_err_no_buf; + + rc = qed_ll2_acquire_connection_rx(p_hwfn, p_ll2_info, rx_num_desc); + if (rc) + goto q_allocate_fail; + + rc = qed_ll2_acquire_connection_tx(p_hwfn, p_ll2_info, tx_num_desc); + if (rc) + goto q_allocate_fail; + + /* Register callbacks for the Rx/Tx queues */ + comp_rx_cb = qed_ll2_rxq_completion; + comp_tx_cb = qed_ll2_txq_completion; + + if (rx_num_desc) { + qed_int_register_cb(p_hwfn, comp_rx_cb, + &p_hwfn->p_ll2_info[i], + &p_ll2_info->rx_queue.rx_sb_index, + &p_ll2_info->rx_queue.p_fw_cons); + p_ll2_info->rx_queue.b_cb_registred = true; + } + + if (tx_num_desc) { + qed_int_register_cb(p_hwfn, + comp_tx_cb, + &p_hwfn->p_ll2_info[i], + &p_ll2_info->tx_queue.tx_sb_index, + &p_ll2_info->tx_queue.p_fw_cons); + p_ll2_info->tx_queue.b_cb_registred = true; + } + + *p_connection_handle = i; + return rc; + +q_allocate_fail: + qed_ll2_release_connection(p_hwfn, i); + return -ENOMEM; +} + +static int qed_ll2_establish_connection_rx(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn) +{ + u8 action_on_error = 0; + + if (!QED_LL2_RX_REGISTERED(p_ll2_conn)) + return 0; + + DIRECT_REG_WR(p_ll2_conn->rx_queue.set_prod_addr, 0x0); + + SET_FIELD(action_on_error, + CORE_RX_ACTION_ON_ERROR_PACKET_TOO_BIG, + p_ll2_conn->ai_err_packet_too_big); + SET_FIELD(action_on_error, + CORE_RX_ACTION_ON_ERROR_NO_BUFF, p_ll2_conn->ai_err_no_buf); + + return qed_sp_ll2_rx_queue_start(p_hwfn, p_ll2_conn, action_on_error); +} + +int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) +{ + struct qed_ll2_info *p_ll2_conn; + struct qed_ll2_rx_queue *p_rx; + struct qed_ll2_tx_queue *p_tx; + int rc = -EINVAL; + u32 i, capacity; + u8 qid; + + p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); + if (!p_ll2_conn) + return -EINVAL; + p_rx = &p_ll2_conn->rx_queue; + p_tx = &p_ll2_conn->tx_queue; + + qed_chain_reset(&p_rx->rxq_chain); + qed_chain_reset(&p_rx->rcq_chain); + INIT_LIST_HEAD(&p_rx->active_descq); + INIT_LIST_HEAD(&p_rx->free_descq); + INIT_LIST_HEAD(&p_rx->posting_descq); + spin_lock_init(&p_rx->lock); + capacity = qed_chain_get_capacity(&p_rx->rxq_chain); + for (i = 0; i < capacity; i++) + list_add_tail(&p_rx->descq_array[i].list_entry, + &p_rx->free_descq); + *p_rx->p_fw_cons = 0; + + qed_chain_reset(&p_tx->txq_chain); + INIT_LIST_HEAD(&p_tx->active_descq); + INIT_LIST_HEAD(&p_tx->free_descq); + INIT_LIST_HEAD(&p_tx->sending_descq); + spin_lock_init(&p_tx->lock); + capacity = qed_chain_get_capacity(&p_tx->txq_chain); + for (i = 0; i < capacity; i++) + list_add_tail(&p_tx->descq_array[i].list_entry, + &p_tx->free_descq); + p_tx->cur_completing_bd_idx = 0; + p_tx->bds_idx = 0; + p_tx->b_completing_packet = false; + p_tx->cur_send_packet = NULL; + p_tx->cur_send_frag_num = 0; + p_tx->cur_completing_frag_num = 0; + *p_tx->p_fw_cons = 0; + + qed_cxt_acquire_cid(p_hwfn, PROTOCOLID_CORE, &p_ll2_conn->cid); + + qid = p_hwfn->hw_info.resc_start[QED_LL2_QUEUE] + connection_handle; + p_ll2_conn->queue_id = qid; + p_ll2_conn->tx_stats_id = qid; + p_rx->set_prod_addr = (u8 __iomem *)p_hwfn->regview + + GTT_BAR0_MAP_REG_TSDM_RAM + + TSTORM_LL2_RX_PRODS_OFFSET(qid); + p_tx->doorbell_addr = (u8 __iomem *)p_hwfn->doorbells + + qed_db_addr(p_ll2_conn->cid, + DQ_DEMS_LEGACY); + + rc = qed_ll2_establish_connection_rx(p_hwfn, p_ll2_conn); + if (rc) + return rc; + + rc = qed_sp_ll2_tx_queue_start(p_hwfn, p_ll2_conn); + if (rc) + return rc; + + if (p_hwfn->hw_info.personality != QED_PCI_ETH_ROCE) + qed_wr(p_hwfn, p_hwfn->p_main_ptt, PRS_REG_USE_LIGHT_L2, 1); + + return rc; +} + +static void qed_ll2_post_rx_buffer_notify_fw(struct qed_hwfn *p_hwfn, + struct qed_ll2_rx_queue *p_rx, + struct qed_ll2_rx_packet *p_curp) +{ + struct qed_ll2_rx_packet *p_posting_packet = NULL; + struct core_ll2_rx_prod rx_prod = { 0, 0, 0 }; + bool b_notify_fw = false; + u16 bd_prod, cq_prod; + + /* This handles the flushing of already posted buffers */ + while (!list_empty(&p_rx->posting_descq)) { + p_posting_packet = list_first_entry(&p_rx->posting_descq, + struct qed_ll2_rx_packet, + list_entry); + list_del(&p_posting_packet->list_entry); + list_add_tail(&p_posting_packet->list_entry, + &p_rx->active_descq); + b_notify_fw = true; + } + + /* This handles the supplied packet [if there is one] */ + if (p_curp) { + list_add_tail(&p_curp->list_entry, &p_rx->active_descq); + b_notify_fw = true; + } + + if (!b_notify_fw) + return; + + bd_prod = qed_chain_get_prod_idx(&p_rx->rxq_chain); + cq_prod = qed_chain_get_prod_idx(&p_rx->rcq_chain); + rx_prod.bd_prod = cpu_to_le16(bd_prod); + rx_prod.cqe_prod = cpu_to_le16(cq_prod); + DIRECT_REG_WR(p_rx->set_prod_addr, *((u32 *)&rx_prod)); +} + +int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn, + u8 connection_handle, + dma_addr_t addr, + u16 buf_len, void *cookie, u8 notify_fw) +{ + struct core_rx_bd_with_buff_len *p_curb = NULL; + struct qed_ll2_rx_packet *p_curp = NULL; + struct qed_ll2_info *p_ll2_conn; + struct qed_ll2_rx_queue *p_rx; + unsigned long flags; + void *p_data; + int rc = 0; + + p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); + if (!p_ll2_conn) + return -EINVAL; + p_rx = &p_ll2_conn->rx_queue; + + spin_lock_irqsave(&p_rx->lock, flags); + if (!list_empty(&p_rx->free_descq)) + p_curp = list_first_entry(&p_rx->free_descq, + struct qed_ll2_rx_packet, list_entry); + if (p_curp) { + if (qed_chain_get_elem_left(&p_rx->rxq_chain) && + qed_chain_get_elem_left(&p_rx->rcq_chain)) { + p_data = qed_chain_produce(&p_rx->rxq_chain); + p_curb = (struct core_rx_bd_with_buff_len *)p_data; + qed_chain_produce(&p_rx->rcq_chain); + } + } + + /* If we're lacking entires, let's try to flush buffers to FW */ + if (!p_curp || !p_curb) { + rc = -EBUSY; + p_curp = NULL; + goto out_notify; + } + + /* We have an Rx packet we can fill */ + DMA_REGPAIR_LE(p_curb->addr, addr); + p_curb->buff_length = cpu_to_le16(buf_len); + p_curp->rx_buf_addr = addr; + p_curp->cookie = cookie; + p_curp->rxq_bd = p_curb; + p_curp->buf_length = buf_len; + list_del(&p_curp->list_entry); + + /* Check if we only want to enqueue this packet without informing FW */ + if (!notify_fw) { + list_add_tail(&p_curp->list_entry, &p_rx->posting_descq); + goto out; + } + +out_notify: + qed_ll2_post_rx_buffer_notify_fw(p_hwfn, p_rx, p_curp); +out: + spin_unlock_irqrestore(&p_rx->lock, flags); + return rc; +} + +static void qed_ll2_prepare_tx_packet_set(struct qed_hwfn *p_hwfn, + struct qed_ll2_tx_queue *p_tx, + struct qed_ll2_tx_packet *p_curp, + u8 num_of_bds, + dma_addr_t first_frag, + u16 first_frag_len, void *p_cookie, + u8 notify_fw) +{ + list_del(&p_curp->list_entry); + p_curp->cookie = p_cookie; + p_curp->bd_used = num_of_bds; + p_curp->notify_fw = notify_fw; + p_tx->cur_send_packet = p_curp; + p_tx->cur_send_frag_num = 0; + + p_curp->bds_set[p_tx->cur_send_frag_num].tx_frag = first_frag; + p_curp->bds_set[p_tx->cur_send_frag_num].frag_len = first_frag_len; + p_tx->cur_send_frag_num++; +} + +static void qed_ll2_prepare_tx_packet_set_bd(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2, + struct qed_ll2_tx_packet *p_curp, + u8 num_of_bds, + enum core_tx_dest tx_dest, + u16 vlan, + u8 bd_flags, + u16 l4_hdr_offset_w, + dma_addr_t first_frag, + u16 first_frag_len) +{ + struct qed_chain *p_tx_chain = &p_ll2->tx_queue.txq_chain; + u16 prod_idx = qed_chain_get_prod_idx(p_tx_chain); + struct core_tx_bd *start_bd = NULL; + u16 frag_idx; + + start_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); + start_bd->nw_vlan_or_lb_echo = cpu_to_le16(vlan); + SET_FIELD(start_bd->bitfield1, CORE_TX_BD_L4_HDR_OFFSET_W, + cpu_to_le16(l4_hdr_offset_w)); + SET_FIELD(start_bd->bitfield1, CORE_TX_BD_TX_DST, tx_dest); + start_bd->bd_flags.as_bitfield = bd_flags; + start_bd->bd_flags.as_bitfield |= CORE_TX_BD_FLAGS_START_BD_MASK << + CORE_TX_BD_FLAGS_START_BD_SHIFT; + SET_FIELD(start_bd->bitfield0, CORE_TX_BD_NBDS, num_of_bds); + DMA_REGPAIR_LE(start_bd->addr, first_frag); + start_bd->nbytes = cpu_to_le16(first_frag_len); + + DP_VERBOSE(p_hwfn, + (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), + "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Tx Producer at [0x%04x] - set with a %04x bytes %02x BDs buffer at %08x:%08x\n", + p_ll2->queue_id, + p_ll2->cid, + p_ll2->conn_type, + prod_idx, + first_frag_len, + num_of_bds, + le32_to_cpu(start_bd->addr.hi), + le32_to_cpu(start_bd->addr.lo)); + + if (p_ll2->tx_queue.cur_send_frag_num == num_of_bds) + return; + + /* Need to provide the packet with additional BDs for frags */ + for (frag_idx = p_ll2->tx_queue.cur_send_frag_num; + frag_idx < num_of_bds; frag_idx++) { + struct core_tx_bd **p_bd = &p_curp->bds_set[frag_idx].txq_bd; + + *p_bd = (struct core_tx_bd *)qed_chain_produce(p_tx_chain); + (*p_bd)->bd_flags.as_bitfield = 0; + (*p_bd)->bitfield1 = 0; + (*p_bd)->bitfield0 = 0; + p_curp->bds_set[frag_idx].tx_frag = 0; + p_curp->bds_set[frag_idx].frag_len = 0; + } +} + +/* This should be called while the Txq spinlock is being held */ +static void qed_ll2_tx_packet_notify(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_conn) +{ + bool b_notify = p_ll2_conn->tx_queue.cur_send_packet->notify_fw; + struct qed_ll2_tx_queue *p_tx = &p_ll2_conn->tx_queue; + struct qed_ll2_tx_packet *p_pkt = NULL; + struct core_db_data db_msg = { 0, 0, 0 }; + u16 bd_prod; + + /* If there are missing BDs, don't do anything now */ + if (p_ll2_conn->tx_queue.cur_send_frag_num != + p_ll2_conn->tx_queue.cur_send_packet->bd_used) + return; + + /* Push the current packet to the list and clean after it */ + list_add_tail(&p_ll2_conn->tx_queue.cur_send_packet->list_entry, + &p_ll2_conn->tx_queue.sending_descq); + p_ll2_conn->tx_queue.cur_send_packet = NULL; + p_ll2_conn->tx_queue.cur_send_frag_num = 0; + + /* Notify FW of packet only if requested to */ + if (!b_notify) + return; + + bd_prod = qed_chain_get_prod_idx(&p_ll2_conn->tx_queue.txq_chain); + + while (!list_empty(&p_tx->sending_descq)) { + p_pkt = list_first_entry(&p_tx->sending_descq, + struct qed_ll2_tx_packet, list_entry); + if (!p_pkt) + break; + + list_del(&p_pkt->list_entry); + list_add_tail(&p_pkt->list_entry, &p_tx->active_descq); + } + + SET_FIELD(db_msg.params, CORE_DB_DATA_DEST, DB_DEST_XCM); + SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_CMD, DB_AGG_CMD_SET); + SET_FIELD(db_msg.params, CORE_DB_DATA_AGG_VAL_SEL, + DQ_XCM_CORE_TX_BD_PROD_CMD); + db_msg.agg_flags = DQ_XCM_CORE_DQ_CF_CMD; + db_msg.spq_prod = cpu_to_le16(bd_prod); + + /* Make sure the BDs data is updated before ringing the doorbell */ + wmb(); + + DIRECT_REG_WR(p_tx->doorbell_addr, *((u32 *)&db_msg)); + + DP_VERBOSE(p_hwfn, + (NETIF_MSG_TX_QUEUED | QED_MSG_LL2), + "LL2 [q 0x%02x cid 0x%08x type 0x%08x] Doorbelled [producer 0x%04x]\n", + p_ll2_conn->queue_id, + p_ll2_conn->cid, p_ll2_conn->conn_type, db_msg.spq_prod); +} + +int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + u8 num_of_bds, + u16 vlan, + u8 bd_flags, + u16 l4_hdr_offset_w, + dma_addr_t first_frag, + u16 first_frag_len, void *cookie, u8 notify_fw) +{ + struct qed_ll2_tx_packet *p_curp = NULL; + struct qed_ll2_info *p_ll2_conn = NULL; + struct qed_ll2_tx_queue *p_tx; + struct qed_chain *p_tx_chain; + unsigned long flags; + int rc = 0; + + p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); + if (!p_ll2_conn) + return -EINVAL; + p_tx = &p_ll2_conn->tx_queue; + p_tx_chain = &p_tx->txq_chain; + + if (num_of_bds > CORE_LL2_TX_MAX_BDS_PER_PACKET) + return -EIO; + + spin_lock_irqsave(&p_tx->lock, flags); + if (p_tx->cur_send_packet) { + rc = -EEXIST; + goto out; + } + + /* Get entry, but only if we have tx elements for it */ + if (!list_empty(&p_tx->free_descq)) + p_curp = list_first_entry(&p_tx->free_descq, + struct qed_ll2_tx_packet, list_entry); + if (p_curp && qed_chain_get_elem_left(p_tx_chain) < num_of_bds) + p_curp = NULL; + + if (!p_curp) { + rc = -EBUSY; + goto out; + } + + /* Prepare packet and BD, and perhaps send a doorbell to FW */ + qed_ll2_prepare_tx_packet_set(p_hwfn, p_tx, p_curp, + num_of_bds, first_frag, + first_frag_len, cookie, notify_fw); + qed_ll2_prepare_tx_packet_set_bd(p_hwfn, p_ll2_conn, p_curp, + num_of_bds, CORE_TX_DEST_NW, + vlan, bd_flags, l4_hdr_offset_w, + first_frag, first_frag_len); + + qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); + +out: + spin_unlock_irqrestore(&p_tx->lock, flags); + return rc; +} + +int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + dma_addr_t addr, u16 nbytes) +{ + struct qed_ll2_tx_packet *p_cur_send_packet = NULL; + struct qed_ll2_info *p_ll2_conn = NULL; + u16 cur_send_frag_num = 0; + struct core_tx_bd *p_bd; + unsigned long flags; + + p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); + if (!p_ll2_conn) + return -EINVAL; + + if (!p_ll2_conn->tx_queue.cur_send_packet) + return -EINVAL; + + p_cur_send_packet = p_ll2_conn->tx_queue.cur_send_packet; + cur_send_frag_num = p_ll2_conn->tx_queue.cur_send_frag_num; + + if (cur_send_frag_num >= p_cur_send_packet->bd_used) + return -EINVAL; + + /* Fill the BD information, and possibly notify FW */ + p_bd = p_cur_send_packet->bds_set[cur_send_frag_num].txq_bd; + DMA_REGPAIR_LE(p_bd->addr, addr); + p_bd->nbytes = cpu_to_le16(nbytes); + p_cur_send_packet->bds_set[cur_send_frag_num].tx_frag = addr; + p_cur_send_packet->bds_set[cur_send_frag_num].frag_len = nbytes; + + p_ll2_conn->tx_queue.cur_send_frag_num++; + + spin_lock_irqsave(&p_ll2_conn->tx_queue.lock, flags); + qed_ll2_tx_packet_notify(p_hwfn, p_ll2_conn); + spin_unlock_irqrestore(&p_ll2_conn->tx_queue.lock, flags); + + return 0; +} + +int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) +{ + struct qed_ll2_info *p_ll2_conn = NULL; + int rc = -EINVAL; + + p_ll2_conn = qed_ll2_handle_sanity_lock(p_hwfn, connection_handle); + if (!p_ll2_conn) + return -EINVAL; + + /* Stop Tx & Rx of connection, if needed */ + if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { + rc = qed_sp_ll2_tx_queue_stop(p_hwfn, p_ll2_conn); + if (rc) + return rc; + qed_ll2_txq_flush(p_hwfn, connection_handle); + } + + if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { + rc = qed_sp_ll2_rx_queue_stop(p_hwfn, p_ll2_conn); + if (rc) + return rc; + qed_ll2_rxq_flush(p_hwfn, connection_handle); + } + + return rc; +} + +void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle) +{ + struct qed_ll2_info *p_ll2_conn = NULL; + + p_ll2_conn = qed_ll2_handle_sanity(p_hwfn, connection_handle); + if (!p_ll2_conn) + return; + + if (QED_LL2_RX_REGISTERED(p_ll2_conn)) { + p_ll2_conn->rx_queue.b_cb_registred = false; + qed_int_unregister_cb(p_hwfn, p_ll2_conn->rx_queue.rx_sb_index); + } + + if (QED_LL2_TX_REGISTERED(p_ll2_conn)) { + p_ll2_conn->tx_queue.b_cb_registred = false; + qed_int_unregister_cb(p_hwfn, p_ll2_conn->tx_queue.tx_sb_index); + } + + kfree(p_ll2_conn->tx_queue.descq_array); + qed_chain_free(p_hwfn->cdev, &p_ll2_conn->tx_queue.txq_chain); + + kfree(p_ll2_conn->rx_queue.descq_array); + qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rxq_chain); + qed_chain_free(p_hwfn->cdev, &p_ll2_conn->rx_queue.rcq_chain); + + qed_cxt_release_cid(p_hwfn, p_ll2_conn->cid); + + mutex_lock(&p_ll2_conn->mutex); + p_ll2_conn->b_active = false; + mutex_unlock(&p_ll2_conn->mutex); +} + +struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn) +{ + struct qed_ll2_info *p_ll2_connections; + u8 i; + + /* Allocate LL2's set struct */ + p_ll2_connections = kcalloc(QED_MAX_NUM_OF_LL2_CONNECTIONS, + sizeof(struct qed_ll2_info), GFP_KERNEL); + if (!p_ll2_connections) { + DP_NOTICE(p_hwfn, "Failed to allocate `struct qed_ll2'\n"); + return NULL; + } + + for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) + p_ll2_connections[i].my_id = i; + + return p_ll2_connections; +} + +void qed_ll2_setup(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_connections) +{ + int i; + + for (i = 0; i < QED_MAX_NUM_OF_LL2_CONNECTIONS; i++) + mutex_init(&p_ll2_connections[i].mutex); +} + +void qed_ll2_free(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_connections) +{ + kfree(p_ll2_connections); +} + +static void _qed_ll2_get_tstats(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, + struct qed_ll2_info *p_ll2_conn, + struct qed_ll2_stats *p_stats) +{ + struct core_ll2_tstorm_per_queue_stat tstats; + u8 qid = p_ll2_conn->queue_id; + u32 tstats_addr; + + memset(&tstats, 0, sizeof(tstats)); + tstats_addr = BAR0_MAP_REG_TSDM_RAM + + CORE_LL2_TSTORM_PER_QUEUE_STAT_OFFSET(qid); + qed_memcpy_from(p_hwfn, p_ptt, &tstats, tstats_addr, sizeof(tstats)); + + p_stats->packet_too_big_discard = + HILO_64_REGPAIR(tstats.packet_too_big_discard); + p_stats->no_buff_discard = HILO_64_REGPAIR(tstats.no_buff_discard); +} + +static void _qed_ll2_get_ustats(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, + struct qed_ll2_info *p_ll2_conn, + struct qed_ll2_stats *p_stats) +{ + struct core_ll2_ustorm_per_queue_stat ustats; + u8 qid = p_ll2_conn->queue_id; + u32 ustats_addr; + + memset(&ustats, 0, sizeof(ustats)); + ustats_addr = BAR0_MAP_REG_USDM_RAM + + CORE_LL2_USTORM_PER_QUEUE_STAT_OFFSET(qid); + qed_memcpy_from(p_hwfn, p_ptt, &ustats, ustats_addr, sizeof(ustats)); + + p_stats->rcv_ucast_bytes = HILO_64_REGPAIR(ustats.rcv_ucast_bytes); + p_stats->rcv_mcast_bytes = HILO_64_REGPAIR(ustats.rcv_mcast_bytes); + p_stats->rcv_bcast_bytes = HILO_64_REGPAIR(ustats.rcv_bcast_bytes); + p_stats->rcv_ucast_pkts = HILO_64_REGPAIR(ustats.rcv_ucast_pkts); + p_stats->rcv_mcast_pkts = HILO_64_REGPAIR(ustats.rcv_mcast_pkts); + p_stats->rcv_bcast_pkts = HILO_64_REGPAIR(ustats.rcv_bcast_pkts); +} + +static void _qed_ll2_get_pstats(struct qed_hwfn *p_hwfn, + struct qed_ptt *p_ptt, + struct qed_ll2_info *p_ll2_conn, + struct qed_ll2_stats *p_stats) +{ + struct core_ll2_pstorm_per_queue_stat pstats; + u8 stats_id = p_ll2_conn->tx_stats_id; + u32 pstats_addr; + + memset(&pstats, 0, sizeof(pstats)); + pstats_addr = BAR0_MAP_REG_PSDM_RAM + + CORE_LL2_PSTORM_PER_QUEUE_STAT_OFFSET(stats_id); + qed_memcpy_from(p_hwfn, p_ptt, &pstats, pstats_addr, sizeof(pstats)); + + p_stats->sent_ucast_bytes = HILO_64_REGPAIR(pstats.sent_ucast_bytes); + p_stats->sent_mcast_bytes = HILO_64_REGPAIR(pstats.sent_mcast_bytes); + p_stats->sent_bcast_bytes = HILO_64_REGPAIR(pstats.sent_bcast_bytes); + p_stats->sent_ucast_pkts = HILO_64_REGPAIR(pstats.sent_ucast_pkts); + p_stats->sent_mcast_pkts = HILO_64_REGPAIR(pstats.sent_mcast_pkts); + p_stats->sent_bcast_pkts = HILO_64_REGPAIR(pstats.sent_bcast_pkts); +} + +int qed_ll2_get_stats(struct qed_hwfn *p_hwfn, + u8 connection_handle, struct qed_ll2_stats *p_stats) +{ + struct qed_ll2_info *p_ll2_conn = NULL; + struct qed_ptt *p_ptt; + + memset(p_stats, 0, sizeof(*p_stats)); + + if ((connection_handle >= QED_MAX_NUM_OF_LL2_CONNECTIONS) || + !p_hwfn->p_ll2_info) + return -EINVAL; + + p_ll2_conn = &p_hwfn->p_ll2_info[connection_handle]; + + p_ptt = qed_ptt_acquire(p_hwfn); + if (!p_ptt) { + DP_ERR(p_hwfn, "Failed to acquire ptt\n"); + return -EINVAL; + } + + _qed_ll2_get_tstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); + _qed_ll2_get_ustats(p_hwfn, p_ptt, p_ll2_conn, p_stats); + if (p_ll2_conn->tx_stats_en) + _qed_ll2_get_pstats(p_hwfn, p_ptt, p_ll2_conn, p_stats); + + qed_ptt_release(p_hwfn, p_ptt); + return 0; +} + +static void qed_ll2_register_cb_ops(struct qed_dev *cdev, + const struct qed_ll2_cb_ops *ops, + void *cookie) +{ + cdev->ll2->cbs = ops; + cdev->ll2->cb_cookie = cookie; +} + +static int qed_ll2_start(struct qed_dev *cdev, struct qed_ll2_params *params) +{ + struct qed_ll2_info ll2_info; + struct qed_ll2_buffer *buffer; + enum qed_ll2_conn_type conn_type; + struct qed_ptt *p_ptt; + int rc, i; + + /* Initialize LL2 locks & lists */ + INIT_LIST_HEAD(&cdev->ll2->list); + spin_lock_init(&cdev->ll2->lock); + cdev->ll2->rx_size = NET_SKB_PAD + ETH_HLEN + + L1_CACHE_BYTES + params->mtu; + cdev->ll2->frags_mapped = params->frags_mapped; + + /*Allocate memory for LL2 */ + DP_INFO(cdev, "Allocating LL2 buffers of size %08x bytes\n", + cdev->ll2->rx_size); + for (i = 0; i < QED_LL2_RX_SIZE; i++) { + buffer = kzalloc(sizeof(*buffer), GFP_KERNEL); + if (!buffer) { + DP_INFO(cdev, "Failed to allocate LL2 buffers\n"); + goto fail; + } + + rc = qed_ll2_alloc_buffer(cdev, (u8 **)&buffer->data, + &buffer->phys_addr); + if (rc) { + kfree(buffer); + goto fail; + } + + list_add_tail(&buffer->list, &cdev->ll2->list); + } + + switch (QED_LEADING_HWFN(cdev)->hw_info.personality) { + case QED_PCI_ISCSI: + conn_type = QED_LL2_TYPE_ISCSI; + break; + case QED_PCI_ETH_ROCE: + conn_type = QED_LL2_TYPE_ROCE; + break; + default: + conn_type = QED_LL2_TYPE_TEST; + } + + /* Prepare the temporary ll2 information */ + memset(&ll2_info, 0, sizeof(ll2_info)); + ll2_info.conn_type = conn_type; + ll2_info.mtu = params->mtu; + ll2_info.rx_drop_ttl0_flg = params->drop_ttl0_packets; + ll2_info.rx_vlan_removal_en = params->rx_vlan_stripping; + ll2_info.tx_tc = 0; + ll2_info.tx_dest = CORE_TX_DEST_NW; + + rc = qed_ll2_acquire_connection(QED_LEADING_HWFN(cdev), &ll2_info, + QED_LL2_RX_SIZE, QED_LL2_TX_SIZE, + &cdev->ll2->handle); + if (rc) { + DP_INFO(cdev, "Failed to acquire LL2 connection\n"); + goto fail; + } + + rc = qed_ll2_establish_connection(QED_LEADING_HWFN(cdev), + cdev->ll2->handle); + if (rc) { + DP_INFO(cdev, "Failed to establish LL2 connection\n"); + goto release_fail; + } + + /* Post all Rx buffers to FW */ + spin_lock_bh(&cdev->ll2->lock); + list_for_each_entry(buffer, &cdev->ll2->list, list) { + rc = qed_ll2_post_rx_buffer(QED_LEADING_HWFN(cdev), + cdev->ll2->handle, + buffer->phys_addr, 0, buffer, 1); + if (rc) { + DP_INFO(cdev, + "Failed to post an Rx buffer; Deleting it\n"); + dma_unmap_single(&cdev->pdev->dev, buffer->phys_addr, + cdev->ll2->rx_size, DMA_FROM_DEVICE); + kfree(buffer->data); + list_del(&buffer->list); + kfree(buffer); + } else { + cdev->ll2->rx_cnt++; + } + } + spin_unlock_bh(&cdev->ll2->lock); + + if (!cdev->ll2->rx_cnt) { + DP_INFO(cdev, "Failed passing even a single Rx buffer\n"); + goto release_terminate; + } + + if (!is_valid_ether_addr(params->ll2_mac_address)) { + DP_INFO(cdev, "Invalid Ethernet address\n"); + goto release_terminate; + } + + p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); + if (!p_ptt) { + DP_INFO(cdev, "Failed to acquire PTT\n"); + goto release_terminate; + } + + rc = qed_llh_add_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, + params->ll2_mac_address); + qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); + if (rc) { + DP_ERR(cdev, "Failed to allocate LLH filter\n"); + goto release_terminate_all; + } + + ether_addr_copy(cdev->ll2_mac_address, params->ll2_mac_address); + + return 0; + +release_terminate_all: + +release_terminate: + qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); +release_fail: + qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); +fail: + qed_ll2_kill_buffers(cdev); + cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; + return -EINVAL; +} + +static int qed_ll2_stop(struct qed_dev *cdev) +{ + struct qed_ptt *p_ptt; + int rc; + + if (cdev->ll2->handle == QED_LL2_UNUSED_HANDLE) + return 0; + + p_ptt = qed_ptt_acquire(QED_LEADING_HWFN(cdev)); + if (!p_ptt) { + DP_INFO(cdev, "Failed to acquire PTT\n"); + goto fail; + } + + qed_llh_remove_mac_filter(QED_LEADING_HWFN(cdev), p_ptt, + cdev->ll2_mac_address); + qed_ptt_release(QED_LEADING_HWFN(cdev), p_ptt); + eth_zero_addr(cdev->ll2_mac_address); + + rc = qed_ll2_terminate_connection(QED_LEADING_HWFN(cdev), + cdev->ll2->handle); + if (rc) + DP_INFO(cdev, "Failed to terminate LL2 connection\n"); + + qed_ll2_kill_buffers(cdev); + + qed_ll2_release_connection(QED_LEADING_HWFN(cdev), cdev->ll2->handle); + cdev->ll2->handle = QED_LL2_UNUSED_HANDLE; + + return rc; +fail: + return -EINVAL; +} + +static int qed_ll2_start_xmit(struct qed_dev *cdev, struct sk_buff *skb) +{ + const skb_frag_t *frag; + int rc = -EINVAL, i; + dma_addr_t mapping; + u16 vlan = 0; + u8 flags = 0; + + if (unlikely(skb->ip_summed != CHECKSUM_NONE)) { + DP_INFO(cdev, "Cannot transmit a checksumed packet\n"); + return -EINVAL; + } + + if (1 + skb_shinfo(skb)->nr_frags > CORE_LL2_TX_MAX_BDS_PER_PACKET) { + DP_ERR(cdev, "Cannot transmit a packet with %d fragments\n", + 1 + skb_shinfo(skb)->nr_frags); + return -EINVAL; + } + + mapping = dma_map_single(&cdev->pdev->dev, skb->data, + skb->len, DMA_TO_DEVICE); + if (unlikely(dma_mapping_error(&cdev->pdev->dev, mapping))) { + DP_NOTICE(cdev, "SKB mapping failed\n"); + return -EINVAL; + } + + /* Request HW to calculate IP csum */ + if (!((vlan_get_protocol(skb) == htons(ETH_P_IPV6)) && + ipv6_hdr(skb)->nexthdr == NEXTHDR_IPV6)) + flags |= BIT(CORE_TX_BD_FLAGS_IP_CSUM_SHIFT); + + if (skb_vlan_tag_present(skb)) { + vlan = skb_vlan_tag_get(skb); + flags |= BIT(CORE_TX_BD_FLAGS_VLAN_INSERTION_SHIFT); + } + + rc = qed_ll2_prepare_tx_packet(QED_LEADING_HWFN(cdev), + cdev->ll2->handle, + 1 + skb_shinfo(skb)->nr_frags, + vlan, flags, 0, mapping, + skb->len, skb, 1); + if (rc) + goto err; + + for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { + frag = &skb_shinfo(skb)->frags[i]; + if (!cdev->ll2->frags_mapped) { + mapping = skb_frag_dma_map(&cdev->pdev->dev, frag, 0, + skb_frag_size(frag), + DMA_TO_DEVICE); + + if (unlikely(dma_mapping_error(&cdev->pdev->dev, + mapping))) { + DP_NOTICE(cdev, + "Unable to map frag - dropping packet\n"); + goto err; + } + } else { + mapping = page_to_phys(skb_frag_page(frag)) | + frag->page_offset; + } + + rc = qed_ll2_set_fragment_of_tx_packet(QED_LEADING_HWFN(cdev), + cdev->ll2->handle, + mapping, + skb_frag_size(frag)); + + /* if failed not much to do here, partial packet has been posted + * we can't free memory, will need to wait for completion. + */ + if (rc) + goto err2; + } + + return 0; + +err: + dma_unmap_single(&cdev->pdev->dev, mapping, skb->len, DMA_TO_DEVICE); + +err2: + return rc; +} + +static int qed_ll2_stats(struct qed_dev *cdev, struct qed_ll2_stats *stats) +{ + if (!cdev->ll2) + return -EINVAL; + + return qed_ll2_get_stats(QED_LEADING_HWFN(cdev), + cdev->ll2->handle, stats); +} + +const struct qed_ll2_ops qed_ll2_ops_pass = { + .start = &qed_ll2_start, + .stop = &qed_ll2_stop, + .start_xmit = &qed_ll2_start_xmit, + .register_cb_ops = &qed_ll2_register_cb_ops, + .get_stats = &qed_ll2_stats, +}; + +int qed_ll2_alloc_if(struct qed_dev *cdev) +{ + cdev->ll2 = kzalloc(sizeof(*cdev->ll2), GFP_KERNEL); + return cdev->ll2 ? 0 : -ENOMEM; +} + +void qed_ll2_dealloc_if(struct qed_dev *cdev) +{ + kfree(cdev->ll2); + cdev->ll2 = NULL; +} diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.h b/drivers/net/ethernet/qlogic/qed/qed_ll2.h new file mode 100644 index 000000000000..a037c4845928 --- /dev/null +++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.h @@ -0,0 +1,289 @@ +/* QLogic qed NIC Driver + * + * Copyright (c) 2015 QLogic Corporation + * + * This software is available under the terms of the GNU General Public License + * (GPL) Version 2, available from the file COPYING in the main directory of + * this source tree. + */ + +#ifndef _QED_LL2_H +#define _QED_LL2_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include "qed.h" +#include "qed_hsi.h" +#include "qed_sp.h" + +#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4) + +enum qed_ll2_conn_type { + QED_LL2_TYPE_RESERVED, + QED_LL2_TYPE_ISCSI, + QED_LL2_TYPE_TEST, + QED_LL2_TYPE_ISCSI_OOO, + QED_LL2_TYPE_RESERVED2, + QED_LL2_TYPE_ROCE, + QED_LL2_TYPE_RESERVED3, + MAX_QED_LL2_RX_CONN_TYPE +}; + +struct qed_ll2_rx_packet { + struct list_head list_entry; + struct core_rx_bd_with_buff_len *rxq_bd; + dma_addr_t rx_buf_addr; + u16 buf_length; + void *cookie; + u8 placement_offset; + u16 parse_flags; + u16 packet_length; + u16 vlan; + u32 opaque_data[2]; +}; + +struct qed_ll2_tx_packet { + struct list_head list_entry; + u16 bd_used; + u16 vlan; + u16 l4_hdr_offset_w; + u8 bd_flags; + bool notify_fw; + void *cookie; + + struct { + struct core_tx_bd *txq_bd; + dma_addr_t tx_frag; + u16 frag_len; + } bds_set[ETH_TX_MAX_BDS_PER_NON_LSO_PACKET]; +}; + +struct qed_ll2_rx_queue { + /* Lock protecting the Rx queue manipulation */ + spinlock_t lock; + struct qed_chain rxq_chain; + struct qed_chain rcq_chain; + u8 rx_sb_index; + bool b_cb_registred; + __le16 *p_fw_cons; + struct list_head active_descq; + struct list_head free_descq; + struct list_head posting_descq; + struct qed_ll2_rx_packet *descq_array; + void __iomem *set_prod_addr; +}; + +struct qed_ll2_tx_queue { + /* Lock protecting the Tx queue manipulation */ + spinlock_t lock; + struct qed_chain txq_chain; + u8 tx_sb_index; + bool b_cb_registred; + __le16 *p_fw_cons; + struct list_head active_descq; + struct list_head free_descq; + struct list_head sending_descq; + struct qed_ll2_tx_packet *descq_array; + struct qed_ll2_tx_packet *cur_send_packet; + struct qed_ll2_tx_packet cur_completing_packet; + u16 cur_completing_bd_idx; + void __iomem *doorbell_addr; + u16 bds_idx; + u16 cur_send_frag_num; + u16 cur_completing_frag_num; + bool b_completing_packet; +}; + +struct qed_ll2_info { + /* Lock protecting the state of LL2 */ + struct mutex mutex; + enum qed_ll2_conn_type conn_type; + u32 cid; + u8 my_id; + u8 queue_id; + u8 tx_stats_id; + bool b_active; + u16 mtu; + u8 rx_drop_ttl0_flg; + u8 rx_vlan_removal_en; + u8 tx_tc; + enum core_tx_dest tx_dest; + enum core_error_handle ai_err_packet_too_big; + enum core_error_handle ai_err_no_buf; + u8 tx_stats_en; + struct qed_ll2_rx_queue rx_queue; + struct qed_ll2_tx_queue tx_queue; +}; + +/** + * @brief qed_ll2_acquire_connection - allocate resources, + * starts rx & tx (if relevant) queues pair. Provides + * connecion handler as output parameter. + * + * @param p_hwfn + * @param p_params Contain various configuration properties + * @param rx_num_desc + * @param tx_num_desc + * + * @param p_connection_handle Output container for LL2 connection's handle + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_acquire_connection(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_params, + u16 rx_num_desc, + u16 tx_num_desc, + u8 *p_connection_handle); + +/** + * @brief qed_ll2_establish_connection - start previously + * allocated LL2 queues pair + * + * @param p_hwfn + * @param p_ptt + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_establish_connection(struct qed_hwfn *p_hwfn, u8 connection_handle); + +/** + * @brief qed_ll2_post_rx_buffers - submit buffers to LL2 Rx queue. + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * @param addr rx (physical address) buffers to submit + * @param cookie + * @param notify_fw produce corresponding Rx BD immediately + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_post_rx_buffer(struct qed_hwfn *p_hwfn, + u8 connection_handle, + dma_addr_t addr, + u16 buf_len, void *cookie, u8 notify_fw); + +/** + * @brief qed_ll2_prepare_tx_packet - request for start Tx BD + * to prepare Tx packet submission to FW. + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * @param num_of_bds a number of requested BD equals a number of + * fragments in Tx packet + * @param vlan VLAN to insert to packet (if insertion set) + * @param bd_flags + * @param l4_hdr_offset_w L4 Header Offset from start of packet + * (in words). This is needed if both l4_csum + * and ipv6_ext are set + * @param first_frag + * @param first_frag_len + * @param cookie + * + * @param notify_fw + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_prepare_tx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + u8 num_of_bds, + u16 vlan, + u8 bd_flags, + u16 l4_hdr_offset_w, + dma_addr_t first_frag, + u16 first_frag_len, void *cookie, u8 notify_fw); + +/** + * @brief qed_ll2_release_connection - releases resources + * allocated for LL2 connection + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + */ +void qed_ll2_release_connection(struct qed_hwfn *p_hwfn, u8 connection_handle); + +/** + * @brief qed_ll2_set_fragment_of_tx_packet - provides fragments to fill + * Tx BD of BDs requested by + * qed_ll2_prepare_tx_packet + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle + * obtained from + * qed_ll2_require_connection + * @param addr + * @param nbytes + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_set_fragment_of_tx_packet(struct qed_hwfn *p_hwfn, + u8 connection_handle, + dma_addr_t addr, u16 nbytes); + +/** + * @brief qed_ll2_terminate_connection - stops Tx/Rx queues + * + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle + * obtained from + * qed_ll2_require_connection + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_terminate_connection(struct qed_hwfn *p_hwfn, u8 connection_handle); + +/** + * @brief qed_ll2_get_stats - get LL2 queue's statistics + * + * + * @param p_hwfn + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * @param p_stats + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_get_stats(struct qed_hwfn *p_hwfn, + u8 connection_handle, struct qed_ll2_stats *p_stats); + +/** + * @brief qed_ll2_alloc - Allocates LL2 connections set + * + * @param p_hwfn + * + * @return pointer to alocated qed_ll2_info or NULL + */ +struct qed_ll2_info *qed_ll2_alloc(struct qed_hwfn *p_hwfn); + +/** + * @brief qed_ll2_setup - Inits LL2 connections set + * + * @param p_hwfn + * @param p_ll2_connections + * + */ +void qed_ll2_setup(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_connections); + +/** + * @brief qed_ll2_free - Releases LL2 connections set + * + * @param p_hwfn + * @param p_ll2_connections + * + */ +void qed_ll2_free(struct qed_hwfn *p_hwfn, + struct qed_ll2_info *p_ll2_connections); + +#endif diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c index b730a632c383..48cdf62c025b 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_main.c +++ b/drivers/net/ethernet/qlogic/qed/qed_main.c @@ -22,11 +22,13 @@ #include #include #include +#include #include "qed.h" #include "qed_sriov.h" #include "qed_sp.h" #include "qed_dev_api.h" +#include "qed_ll2.h" #include "qed_mcp.h" #include "qed_hw.h" #include "qed_selftest.h" @@ -608,7 +610,16 @@ static int qed_nic_reset(struct qed_dev *cdev) static int qed_nic_setup(struct qed_dev *cdev) { - int rc; + int rc, i; + + /* Determine if interface is going to require LL2 */ + if (QED_LEADING_HWFN(cdev)->hw_info.personality != QED_PCI_ETH) { + for (i = 0; i < cdev->num_hwfns; i++) { + struct qed_hwfn *p_hwfn = &cdev->hwfns[i]; + + p_hwfn->using_ll2 = true; + } + } rc = qed_resc_alloc(cdev); if (rc) @@ -873,6 +884,12 @@ static int qed_slowpath_start(struct qed_dev *cdev, DP_INFO(cdev, "HW initialization and function start completed successfully\n"); + /* Allocate LL2 interface if needed */ + if (QED_LEADING_HWFN(cdev)->using_ll2) { + rc = qed_ll2_alloc_if(cdev); + if (rc) + goto err3; + } if (IS_PF(cdev)) { hwfn = QED_LEADING_HWFN(cdev); drv_version.version = (params->drv_major << 24) | @@ -893,6 +910,8 @@ static int qed_slowpath_start(struct qed_dev *cdev, return 0; +err3: + qed_hw_stop(cdev); err2: qed_hw_timers_stop_all(cdev); if (IS_PF(cdev)) @@ -915,6 +934,8 @@ static int qed_slowpath_stop(struct qed_dev *cdev) if (!cdev) return -ENODEV; + qed_ll2_dealloc_if(cdev); + if (IS_PF(cdev)) { qed_free_stream_mem(cdev); if (IS_QED_ETH_IF(cdev)) diff --git a/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h b/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h index 759cb04e02b0..e75738d21783 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h +++ b/drivers/net/ethernet/qlogic/qed/qed_reg_addr.h @@ -208,6 +208,26 @@ 0x50196cUL #define NIG_REG_LLH_CLS_TYPE_DUALMODE \ 0x501964UL +#define NIG_REG_LLH_FUNC_FILTER_VALUE \ + 0x501a00UL +#define NIG_REG_LLH_FUNC_FILTER_VALUE_SIZE \ + 32 +#define NIG_REG_LLH_FUNC_FILTER_EN \ + 0x501a80UL +#define NIG_REG_LLH_FUNC_FILTER_EN_SIZE \ + 16 +#define NIG_REG_LLH_FUNC_FILTER_MODE \ + 0x501ac0UL +#define NIG_REG_LLH_FUNC_FILTER_MODE_SIZE \ + 16 +#define NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE \ + 0x501b00UL +#define NIG_REG_LLH_FUNC_FILTER_PROTOCOL_TYPE_SIZE \ + 16 +#define NIG_REG_LLH_FUNC_FILTER_HDR_SEL \ + 0x501b40UL +#define NIG_REG_LLH_FUNC_FILTER_HDR_SEL_SIZE \ + 16 #define NCSI_REG_CONFIG \ 0x040200UL #define PBF_REG_INIT \ @@ -264,6 +284,8 @@ 0x1f0a1cUL #define PRS_REG_ROCE_DEST_QP_MAX_PF \ 0x1f0430UL +#define PRS_REG_USE_LIGHT_L2 \ + 0x1f096cUL #define PSDM_REG_ENABLE_IN1 \ 0xfa0004UL #define PSEM_REG_ENABLE_IN \ diff --git a/drivers/net/ethernet/qlogic/qed/qed_sp.h b/drivers/net/ethernet/qlogic/qed/qed_sp.h index a548504c3420..a3c539f1c2ac 100644 --- a/drivers/net/ethernet/qlogic/qed/qed_sp.h +++ b/drivers/net/ethernet/qlogic/qed/qed_sp.h @@ -61,6 +61,10 @@ union ramrod_data { struct vport_start_ramrod_data vport_start; struct vport_stop_ramrod_data vport_stop; struct vport_update_ramrod_data vport_update; + struct core_rx_start_ramrod_data core_rx_queue_start; + struct core_rx_stop_ramrod_data core_rx_queue_stop; + struct core_tx_start_ramrod_data core_tx_queue_start; + struct core_tx_stop_ramrod_data core_tx_queue_stop; struct vport_filter_update_ramrod_data vport_filter_update; struct rdma_init_func_ramrod_data rdma_init_func; diff --git a/include/linux/qed/qed_if.h b/include/linux/qed/qed_if.h index e4546abcea08..c2d74e8785cf 100644 --- a/include/linux/qed/qed_if.h +++ b/include/linux/qed/qed_if.h @@ -627,6 +627,7 @@ enum DP_MODULE { QED_MSG_SP = 0x100000, QED_MSG_STORAGE = 0x200000, QED_MSG_CXT = 0x800000, + QED_MSG_LL2 = 0x1000000, QED_MSG_ILT = 0x2000000, QED_MSG_ROCE = 0x4000000, QED_MSG_DEBUG = 0x8000000, diff --git a/include/linux/qed/qed_ll2_if.h b/include/linux/qed/qed_ll2_if.h new file mode 100644 index 000000000000..fd75c265dba3 --- /dev/null +++ b/include/linux/qed/qed_ll2_if.h @@ -0,0 +1,139 @@ +/* QLogic qed NIC Driver + * + * Copyright (c) 2015 QLogic Corporation + * + * This software is available under the terms of the GNU General Public License + * (GPL) Version 2, available from the file COPYING in the main directory of + * this source tree. + */ + +#ifndef _QED_LL2_IF_H +#define _QED_LL2_IF_H + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct qed_ll2_stats { + u64 gsi_invalid_hdr; + u64 gsi_invalid_pkt_length; + u64 gsi_unsupported_pkt_typ; + u64 gsi_crcchksm_error; + + u64 packet_too_big_discard; + u64 no_buff_discard; + + u64 rcv_ucast_bytes; + u64 rcv_mcast_bytes; + u64 rcv_bcast_bytes; + u64 rcv_ucast_pkts; + u64 rcv_mcast_pkts; + u64 rcv_bcast_pkts; + + u64 sent_ucast_bytes; + u64 sent_mcast_bytes; + u64 sent_bcast_bytes; + u64 sent_ucast_pkts; + u64 sent_mcast_pkts; + u64 sent_bcast_pkts; +}; + +#define QED_LL2_UNUSED_HANDLE (0xff) + +struct qed_ll2_cb_ops { + int (*rx_cb)(void *, struct sk_buff *, u32, u32); + int (*tx_cb)(void *, struct sk_buff *, bool); +}; + +struct qed_ll2_params { + u16 mtu; + bool drop_ttl0_packets; + bool rx_vlan_stripping; + u8 tx_tc; + bool frags_mapped; + u8 ll2_mac_address[ETH_ALEN]; +}; + +struct qed_ll2_ops { +/** + * @brief start - initializes ll2 + * + * @param cdev + * @param params - protocol driver configuration for the ll2. + * + * @return 0 on success, otherwise error value. + */ + int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params); + +/** + * @brief stop - stops the ll2 + * + * @param cdev + * + * @return 0 on success, otherwise error value. + */ + int (*stop)(struct qed_dev *cdev); + +/** + * @brief start_xmit - transmits an skb over the ll2 interface + * + * @param cdev + * @param skb + * + * @return 0 on success, otherwise error value. + */ + int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb); + +/** + * @brief register_cb_ops - protocol driver register the callback for Rx/Tx + * packets. Should be called before `start'. + * + * @param cdev + * @param cookie - to be passed to the callback functions. + * @param ops - the callback functions to register for Rx / Tx. + * + * @return 0 on success, otherwise error value. + */ + void (*register_cb_ops)(struct qed_dev *cdev, + const struct qed_ll2_cb_ops *ops, + void *cookie); + +/** + * @brief get LL2 related statistics + * + * @param cdev + * @param stats - pointer to struct that would be filled with stats + * + * @return 0 on success, error otherwise. + */ + int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats); +}; + +#ifdef CONFIG_QED_LL2 +int qed_ll2_alloc_if(struct qed_dev *); +void qed_ll2_dealloc_if(struct qed_dev *); +#else +static const struct qed_ll2_ops qed_ll2_ops_pass = { + .start = NULL, + .stop = NULL, + .start_xmit = NULL, + .register_cb_ops = NULL, + .get_stats = NULL, +}; + +static inline int qed_ll2_alloc_if(struct qed_dev *cdev) +{ + return 0; +} + +static inline void qed_ll2_dealloc_if(struct qed_dev *cdev) +{ +} +#endif +#endif -- 2.20.1