--- /dev/null
+/*
+ * Copyright (c) 2016~2017 Hisilicon Limited.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/dma-mapping.h>
+#include <linux/etherdevice.h>
+#include <linux/interrupt.h>
+#include <linux/if_vlan.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/skbuff.h>
+#include <linux/sctp.h>
+#include <linux/vermagic.h>
+#include <net/gre.h>
+#include <net/vxlan.h>
+
+#include "hnae3.h"
+#include "hns3_enet.h"
+
+const char hns3_driver_name[] = "hns3";
+const char hns3_driver_version[] = VERMAGIC_STRING;
+static const char hns3_driver_string[] =
+ "Hisilicon Ethernet Network Driver for Hip08 Family";
+static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
+static struct hnae3_client client;
+
+/* hns3_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 hns3_pci_tbl[] = {
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC), 0},
+ {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC), 0},
+ /* required last entry */
+ {0, }
+};
+MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);
+
+static irqreturn_t hns3_irq_handle(int irq, void *dev)
+{
+ struct hns3_enet_tqp_vector *tqp_vector = dev;
+
+ napi_schedule(&tqp_vector->napi);
+
+ return IRQ_HANDLED;
+}
+
+static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
+{
+ struct hns3_enet_tqp_vector *tqp_vectors;
+ unsigned int i;
+
+ for (i = 0; i < priv->vector_num; i++) {
+ tqp_vectors = &priv->tqp_vector[i];
+
+ if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
+ continue;
+
+ /* release the irq resource */
+ free_irq(tqp_vectors->vector_irq, tqp_vectors);
+ tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
+ }
+}
+
+static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
+{
+ struct hns3_enet_tqp_vector *tqp_vectors;
+ int txrx_int_idx = 0;
+ int rx_int_idx = 0;
+ int tx_int_idx = 0;
+ unsigned int i;
+ int ret;
+
+ for (i = 0; i < priv->vector_num; i++) {
+ tqp_vectors = &priv->tqp_vector[i];
+
+ if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
+ continue;
+
+ if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
+ snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
+ "%s-%s-%d", priv->netdev->name, "TxRx",
+ txrx_int_idx++);
+ txrx_int_idx++;
+ } else if (tqp_vectors->rx_group.ring) {
+ snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
+ "%s-%s-%d", priv->netdev->name, "Rx",
+ rx_int_idx++);
+ } else if (tqp_vectors->tx_group.ring) {
+ snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
+ "%s-%s-%d", priv->netdev->name, "Tx",
+ tx_int_idx++);
+ } else {
+ /* Skip this unused q_vector */
+ continue;
+ }
+
+ tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
+
+ ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
+ tqp_vectors->name,
+ tqp_vectors);
+ if (ret) {
+ netdev_err(priv->netdev, "request irq(%d) fail\n",
+ tqp_vectors->vector_irq);
+ return ret;
+ }
+
+ tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
+ }
+
+ return 0;
+}
+
+static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
+ u32 mask_en)
+{
+ writel(mask_en, tqp_vector->mask_addr);
+}
+
+static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
+{
+ napi_enable(&tqp_vector->napi);
+
+ /* enable vector */
+ hns3_mask_vector_irq(tqp_vector, 1);
+}
+
+static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
+{
+ /* disable vector */
+ hns3_mask_vector_irq(tqp_vector, 0);
+
+ disable_irq(tqp_vector->vector_irq);
+ napi_disable(&tqp_vector->napi);
+}
+
+static void hns3_set_vector_coalesc_gl(struct hns3_enet_tqp_vector *tqp_vector,
+ u32 gl_value)
+{
+ /* this defines the configuration for GL (Interrupt Gap Limiter)
+ * GL defines inter interrupt gap.
+ * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
+ */
+ writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
+ writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
+ writel(gl_value, tqp_vector->mask_addr + HNS3_VECTOR_GL2_OFFSET);
+}
+
+static void hns3_set_vector_coalesc_rl(struct hns3_enet_tqp_vector *tqp_vector,
+ u32 rl_value)
+{
+ /* this defines the configuration for RL (Interrupt Rate Limiter).
+ * Rl defines rate of interrupts i.e. number of interrupts-per-second
+ * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
+ */
+ writel(rl_value, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
+}
+
+static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector)
+{
+ /* initialize the configuration for interrupt coalescing.
+ * 1. GL (Interrupt Gap Limiter)
+ * 2. RL (Interrupt Rate Limiter)
+ */
+
+ /* Default :enable interrupt coalesce */
+ tqp_vector->rx_group.int_gl = HNS3_INT_GL_50K;
+ tqp_vector->tx_group.int_gl = HNS3_INT_GL_50K;
+ hns3_set_vector_coalesc_gl(tqp_vector, HNS3_INT_GL_50K);
+ /* for now we are disabling Interrupt RL - we
+ * will re-enable later
+ */
+ hns3_set_vector_coalesc_rl(tqp_vector, 0);
+ tqp_vector->rx_group.flow_level = HNS3_FLOW_LOW;
+ tqp_vector->tx_group.flow_level = HNS3_FLOW_LOW;
+}
+
+static int hns3_nic_net_up(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ int i, j;
+ int ret;
+
+ /* get irq resource for all vectors */
+ ret = hns3_nic_init_irq(priv);
+ if (ret) {
+ netdev_err(netdev, "hns init irq failed! ret=%d\n", ret);
+ return ret;
+ }
+
+ /* enable the vectors */
+ for (i = 0; i < priv->vector_num; i++)
+ hns3_vector_enable(&priv->tqp_vector[i]);
+
+ /* start the ae_dev */
+ ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
+ if (ret)
+ goto out_start_err;
+
+ return 0;
+
+out_start_err:
+ for (j = i - 1; j >= 0; j--)
+ hns3_vector_disable(&priv->tqp_vector[j]);
+
+ hns3_nic_uninit_irq(priv);
+
+ return ret;
+}
+
+static int hns3_nic_net_open(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ int ret;
+
+ netif_carrier_off(netdev);
+
+ ret = netif_set_real_num_tx_queues(netdev, h->kinfo.num_tqps);
+ if (ret) {
+ netdev_err(netdev,
+ "netif_set_real_num_tx_queues fail, ret=%d!\n",
+ ret);
+ return ret;
+ }
+
+ ret = netif_set_real_num_rx_queues(netdev, h->kinfo.num_tqps);
+ if (ret) {
+ netdev_err(netdev,
+ "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
+ return ret;
+ }
+
+ ret = hns3_nic_net_up(netdev);
+ if (ret) {
+ netdev_err(netdev,
+ "hns net up fail, ret=%d!\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static void hns3_nic_net_down(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ const struct hnae3_ae_ops *ops;
+ int i;
+
+ /* stop ae_dev */
+ ops = priv->ae_handle->ae_algo->ops;
+ if (ops->stop)
+ ops->stop(priv->ae_handle);
+
+ /* disable vectors */
+ for (i = 0; i < priv->vector_num; i++)
+ hns3_vector_disable(&priv->tqp_vector[i]);
+
+ /* free irq resources */
+ hns3_nic_uninit_irq(priv);
+}
+
+static int hns3_nic_net_stop(struct net_device *netdev)
+{
+ netif_tx_stop_all_queues(netdev);
+ netif_carrier_off(netdev);
+
+ hns3_nic_net_down(netdev);
+
+ return 0;
+}
+
+void hns3_set_multicast_list(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ struct netdev_hw_addr *ha = NULL;
+
+ if (h->ae_algo->ops->set_mc_addr) {
+ netdev_for_each_mc_addr(ha, netdev)
+ if (h->ae_algo->ops->set_mc_addr(h, ha->addr))
+ netdev_err(netdev, "set multicast fail\n");
+ }
+}
+
+static int hns3_nic_uc_sync(struct net_device *netdev,
+ const unsigned char *addr)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (h->ae_algo->ops->add_uc_addr)
+ return h->ae_algo->ops->add_uc_addr(h, addr);
+
+ return 0;
+}
+
+static int hns3_nic_uc_unsync(struct net_device *netdev,
+ const unsigned char *addr)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (h->ae_algo->ops->rm_uc_addr)
+ return h->ae_algo->ops->rm_uc_addr(h, addr);
+
+ return 0;
+}
+
+static int hns3_nic_mc_sync(struct net_device *netdev,
+ const unsigned char *addr)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (h->ae_algo->ops->add_uc_addr)
+ return h->ae_algo->ops->add_mc_addr(h, addr);
+
+ return 0;
+}
+
+static int hns3_nic_mc_unsync(struct net_device *netdev,
+ const unsigned char *addr)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (h->ae_algo->ops->rm_uc_addr)
+ return h->ae_algo->ops->rm_mc_addr(h, addr);
+
+ return 0;
+}
+
+void hns3_nic_set_rx_mode(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (h->ae_algo->ops->set_promisc_mode) {
+ if (netdev->flags & IFF_PROMISC)
+ h->ae_algo->ops->set_promisc_mode(h, 1);
+ else
+ h->ae_algo->ops->set_promisc_mode(h, 0);
+ }
+ if (__dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync))
+ netdev_err(netdev, "sync uc address fail\n");
+ if (netdev->flags & IFF_MULTICAST)
+ if (__dev_mc_sync(netdev, hns3_nic_mc_sync, hns3_nic_mc_unsync))
+ netdev_err(netdev, "sync mc address fail\n");
+}
+
+static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
+ u16 *mss, u32 *type_cs_vlan_tso)
+{
+ u32 l4_offset, hdr_len;
+ union l3_hdr_info l3;
+ union l4_hdr_info l4;
+ u32 l4_paylen;
+ int ret;
+
+ if (!skb_is_gso(skb))
+ return 0;
+
+ ret = skb_cow_head(skb, 0);
+ if (ret)
+ return ret;
+
+ l3.hdr = skb_network_header(skb);
+ l4.hdr = skb_transport_header(skb);
+
+ /* Software should clear the IPv4's checksum field when tso is
+ * needed.
+ */
+ if (l3.v4->version == 4)
+ l3.v4->check = 0;
+
+ /* tunnel packet.*/
+ if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
+ SKB_GSO_GRE_CSUM |
+ SKB_GSO_UDP_TUNNEL |
+ SKB_GSO_UDP_TUNNEL_CSUM)) {
+ if ((!(skb_shinfo(skb)->gso_type &
+ SKB_GSO_PARTIAL)) &&
+ (skb_shinfo(skb)->gso_type &
+ SKB_GSO_UDP_TUNNEL_CSUM)) {
+ /* Software should clear the udp's checksum
+ * field when tso is needed.
+ */
+ l4.udp->check = 0;
+ }
+ /* reset l3&l4 pointers from outer to inner headers */
+ l3.hdr = skb_inner_network_header(skb);
+ l4.hdr = skb_inner_transport_header(skb);
+
+ /* Software should clear the IPv4's checksum field when
+ * tso is needed.
+ */
+ if (l3.v4->version == 4)
+ l3.v4->check = 0;
+ }
+
+ /* normal or tunnel packet*/
+ l4_offset = l4.hdr - skb->data;
+ hdr_len = (l4.tcp->doff * 4) + l4_offset;
+
+ /* remove payload length from inner pseudo checksum when tso*/
+ l4_paylen = skb->len - l4_offset;
+ csum_replace_by_diff(&l4.tcp->check,
+ (__force __wsum)htonl(l4_paylen));
+
+ /* find the txbd field values */
+ *paylen = skb->len - hdr_len;
+ hnae_set_bit(*type_cs_vlan_tso,
+ HNS3_TXD_TSO_B, 1);
+
+ /* get MSS for TSO */
+ *mss = skb_shinfo(skb)->gso_size;
+
+ return 0;
+}
+
+static void hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
+ u8 *il4_proto)
+{
+ union {
+ struct iphdr *v4;
+ struct ipv6hdr *v6;
+ unsigned char *hdr;
+ } l3;
+ unsigned char *l4_hdr;
+ unsigned char *exthdr;
+ u8 l4_proto_tmp;
+ __be16 frag_off;
+
+ /* find outer header point */
+ l3.hdr = skb_network_header(skb);
+ l4_hdr = skb_inner_transport_header(skb);
+
+ if (skb->protocol == htons(ETH_P_IPV6)) {
+ exthdr = l3.hdr + sizeof(*l3.v6);
+ l4_proto_tmp = l3.v6->nexthdr;
+ if (l4_hdr != exthdr)
+ ipv6_skip_exthdr(skb, exthdr - skb->data,
+ &l4_proto_tmp, &frag_off);
+ } else if (skb->protocol == htons(ETH_P_IP)) {
+ l4_proto_tmp = l3.v4->protocol;
+ }
+
+ *ol4_proto = l4_proto_tmp;
+
+ /* tunnel packet */
+ if (!skb->encapsulation) {
+ *il4_proto = 0;
+ return;
+ }
+
+ /* find inner header point */
+ l3.hdr = skb_inner_network_header(skb);
+ l4_hdr = skb_inner_transport_header(skb);
+
+ if (l3.v6->version == 6) {
+ exthdr = l3.hdr + sizeof(*l3.v6);
+ l4_proto_tmp = l3.v6->nexthdr;
+ if (l4_hdr != exthdr)
+ ipv6_skip_exthdr(skb, exthdr - skb->data,
+ &l4_proto_tmp, &frag_off);
+ } else if (l3.v4->version == 4) {
+ l4_proto_tmp = l3.v4->protocol;
+ }
+
+ *il4_proto = l4_proto_tmp;
+}
+
+static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
+ u8 il4_proto, u32 *type_cs_vlan_tso,
+ u32 *ol_type_vlan_len_msec)
+{
+ union {
+ struct iphdr *v4;
+ struct ipv6hdr *v6;
+ unsigned char *hdr;
+ } l3;
+ union {
+ struct tcphdr *tcp;
+ struct udphdr *udp;
+ struct gre_base_hdr *gre;
+ unsigned char *hdr;
+ } l4;
+ unsigned char *l2_hdr;
+ u8 l4_proto = ol4_proto;
+ u32 ol2_len;
+ u32 ol3_len;
+ u32 ol4_len;
+ u32 l2_len;
+ u32 l3_len;
+
+ l3.hdr = skb_network_header(skb);
+ l4.hdr = skb_transport_header(skb);
+
+ /* compute L2 header size for normal packet, defined in 2 Bytes */
+ l2_len = l3.hdr - skb->data;
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
+ HNS3_TXD_L2LEN_S, l2_len >> 1);
+
+ /* tunnel packet*/
+ if (skb->encapsulation) {
+ /* compute OL2 header size, defined in 2 Bytes */
+ ol2_len = l2_len;
+ hnae_set_field(*ol_type_vlan_len_msec,
+ HNS3_TXD_L2LEN_M,
+ HNS3_TXD_L2LEN_S, ol2_len >> 1);
+
+ /* compute OL3 header size, defined in 4 Bytes */
+ ol3_len = l4.hdr - l3.hdr;
+ hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_M,
+ HNS3_TXD_L3LEN_S, ol3_len >> 2);
+
+ /* MAC in UDP, MAC in GRE (0x6558)*/
+ if ((ol4_proto == IPPROTO_UDP) || (ol4_proto == IPPROTO_GRE)) {
+ /* switch MAC header ptr from outer to inner header.*/
+ l2_hdr = skb_inner_mac_header(skb);
+
+ /* compute OL4 header size, defined in 4 Bytes. */
+ ol4_len = l2_hdr - l4.hdr;
+ hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_M,
+ HNS3_TXD_L4LEN_S, ol4_len >> 2);
+
+ /* switch IP header ptr from outer to inner header */
+ l3.hdr = skb_inner_network_header(skb);
+
+ /* compute inner l2 header size, defined in 2 Bytes. */
+ l2_len = l3.hdr - l2_hdr;
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
+ HNS3_TXD_L2LEN_S, l2_len >> 1);
+ } else {
+ /* skb packet types not supported by hardware,
+ * txbd len fild doesn't be filled.
+ */
+ return;
+ }
+
+ /* switch L4 header pointer from outer to inner */
+ l4.hdr = skb_inner_transport_header(skb);
+
+ l4_proto = il4_proto;
+ }
+
+ /* compute inner(/normal) L3 header size, defined in 4 Bytes */
+ l3_len = l4.hdr - l3.hdr;
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_M,
+ HNS3_TXD_L3LEN_S, l3_len >> 2);
+
+ /* compute inner(/normal) L4 header size, defined in 4 Bytes */
+ switch (l4_proto) {
+ case IPPROTO_TCP:
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
+ HNS3_TXD_L4LEN_S, l4.tcp->doff);
+ break;
+ case IPPROTO_SCTP:
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
+ HNS3_TXD_L4LEN_S, (sizeof(struct sctphdr) >> 2));
+ break;
+ case IPPROTO_UDP:
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
+ HNS3_TXD_L4LEN_S, (sizeof(struct udphdr) >> 2));
+ break;
+ default:
+ /* skb packet types not supported by hardware,
+ * txbd len fild doesn't be filled.
+ */
+ return;
+ }
+}
+
+static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
+ u8 il4_proto, u32 *type_cs_vlan_tso,
+ u32 *ol_type_vlan_len_msec)
+{
+ union {
+ struct iphdr *v4;
+ struct ipv6hdr *v6;
+ unsigned char *hdr;
+ } l3;
+ u32 l4_proto = ol4_proto;
+
+ l3.hdr = skb_network_header(skb);
+
+ /* define OL3 type and tunnel type(OL4).*/
+ if (skb->encapsulation) {
+ /* define outer network header type.*/
+ if (skb->protocol == htons(ETH_P_IP)) {
+ if (skb_is_gso(skb))
+ hnae_set_field(*ol_type_vlan_len_msec,
+ HNS3_TXD_OL3T_M, HNS3_TXD_OL3T_S,
+ HNS3_OL3T_IPV4_CSUM);
+ else
+ hnae_set_field(*ol_type_vlan_len_msec,
+ HNS3_TXD_OL3T_M, HNS3_TXD_OL3T_S,
+ HNS3_OL3T_IPV4_NO_CSUM);
+
+ } else if (skb->protocol == htons(ETH_P_IPV6)) {
+ hnae_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_M,
+ HNS3_TXD_OL3T_S, HNS3_OL3T_IPV6);
+ }
+
+ /* define tunnel type(OL4).*/
+ switch (l4_proto) {
+ case IPPROTO_UDP:
+ hnae_set_field(*ol_type_vlan_len_msec,
+ HNS3_TXD_TUNTYPE_M,
+ HNS3_TXD_TUNTYPE_S,
+ HNS3_TUN_MAC_IN_UDP);
+ break;
+ case IPPROTO_GRE:
+ hnae_set_field(*ol_type_vlan_len_msec,
+ HNS3_TXD_TUNTYPE_M,
+ HNS3_TXD_TUNTYPE_S,
+ HNS3_TUN_NVGRE);
+ break;
+ default:
+ /* drop the skb tunnel packet if hardware don't support,
+ * because hardware can't calculate csum when TSO.
+ */
+ if (skb_is_gso(skb))
+ return -EDOM;
+
+ /* the stack computes the IP header already,
+ * driver calculate l4 checksum when not TSO.
+ */
+ skb_checksum_help(skb);
+ return 0;
+ }
+
+ l3.hdr = skb_inner_network_header(skb);
+ l4_proto = il4_proto;
+ }
+
+ if (l3.v4->version == 4) {
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
+ HNS3_TXD_L3T_S, HNS3_L3T_IPV4);
+
+ /* the stack computes the IP header already, the only time we
+ * need the hardware to recompute it is in the case of TSO.
+ */
+ if (skb_is_gso(skb))
+ hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
+
+ hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
+ } else if (l3.v6->version == 6) {
+ hnae_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
+ HNS3_TXD_L3T_S, HNS3_L3T_IPV6);
+ hnae_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
+ }
+
+ switch (l4_proto) {
+ case IPPROTO_TCP:
+ hnae_set_field(*type_cs_vlan_tso,
+ HNS3_TXD_L4T_M,
+ HNS3_TXD_L4T_S,
+ HNS3_L4T_TCP);
+ break;
+ case IPPROTO_UDP:
+ hnae_set_field(*type_cs_vlan_tso,
+ HNS3_TXD_L4T_M,
+ HNS3_TXD_L4T_S,
+ HNS3_L4T_UDP);
+ break;
+ case IPPROTO_SCTP:
+ hnae_set_field(*type_cs_vlan_tso,
+ HNS3_TXD_L4T_M,
+ HNS3_TXD_L4T_S,
+ HNS3_L4T_SCTP);
+ break;
+ default:
+ /* drop the skb tunnel packet if hardware don't support,
+ * because hardware can't calculate csum when TSO.
+ */
+ if (skb_is_gso(skb))
+ return -EDOM;
+
+ /* the stack computes the IP header already,
+ * driver calculate l4 checksum when not TSO.
+ */
+ skb_checksum_help(skb);
+ return 0;
+ }
+
+ return 0;
+}
+
+static void hns3_set_txbd_baseinfo(u16 *bdtp_fe_sc_vld_ra_ri, int frag_end)
+{
+ /* Config bd buffer end */
+ hnae_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_BDTYPE_M,
+ HNS3_TXD_BDTYPE_M, 0);
+ hnae_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_FE_B, !!frag_end);
+ hnae_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_VLD_B, 1);
+ hnae_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_SC_M, HNS3_TXD_SC_S, 1);
+}
+
+static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
+ int size, dma_addr_t dma, int frag_end,
+ enum hns_desc_type type)
+{
+ struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
+ struct hns3_desc *desc = &ring->desc[ring->next_to_use];
+ u32 ol_type_vlan_len_msec = 0;
+ u16 bdtp_fe_sc_vld_ra_ri = 0;
+ u32 type_cs_vlan_tso = 0;
+ struct sk_buff *skb;
+ u32 paylen = 0;
+ u16 mss = 0;
+ __be16 protocol;
+ u8 ol4_proto;
+ u8 il4_proto;
+ int ret;
+
+ /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
+ desc_cb->priv = priv;
+ desc_cb->length = size;
+ desc_cb->dma = dma;
+ desc_cb->type = type;
+
+ /* now, fill the descriptor */
+ desc->addr = cpu_to_le64(dma);
+ desc->tx.send_size = cpu_to_le16((u16)size);
+ hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri, frag_end);
+ desc->tx.bdtp_fe_sc_vld_ra_ri = cpu_to_le16(bdtp_fe_sc_vld_ra_ri);
+
+ if (type == DESC_TYPE_SKB) {
+ skb = (struct sk_buff *)priv;
+ paylen = cpu_to_le16(skb->len);
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL) {
+ skb_reset_mac_len(skb);
+ protocol = skb->protocol;
+
+ /* vlan packet*/
+ if (protocol == htons(ETH_P_8021Q)) {
+ protocol = vlan_get_protocol(skb);
+ skb->protocol = protocol;
+ }
+ hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
+ hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
+ &type_cs_vlan_tso,
+ &ol_type_vlan_len_msec);
+ ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
+ &type_cs_vlan_tso,
+ &ol_type_vlan_len_msec);
+ if (ret)
+ return ret;
+
+ ret = hns3_set_tso(skb, &paylen, &mss,
+ &type_cs_vlan_tso);
+ if (ret)
+ return ret;
+ }
+
+ /* Set txbd */
+ desc->tx.ol_type_vlan_len_msec =
+ cpu_to_le32(ol_type_vlan_len_msec);
+ desc->tx.type_cs_vlan_tso_len =
+ cpu_to_le32(type_cs_vlan_tso);
+ desc->tx.paylen = cpu_to_le16(paylen);
+ desc->tx.mss = cpu_to_le16(mss);
+ }
+
+ /* move ring pointer to next.*/
+ ring_ptr_move_fw(ring, next_to_use);
+
+ return 0;
+}
+
+static int hns3_fill_desc_tso(struct hns3_enet_ring *ring, void *priv,
+ int size, dma_addr_t dma, int frag_end,
+ enum hns_desc_type type)
+{
+ unsigned int frag_buf_num;
+ unsigned int k;
+ int sizeoflast;
+ int ret;
+
+ frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
+ sizeoflast = size % HNS3_MAX_BD_SIZE;
+ sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
+
+ /* When the frag size is bigger than hardware, split this frag */
+ for (k = 0; k < frag_buf_num; k++) {
+ ret = hns3_fill_desc(ring, priv,
+ (k == frag_buf_num - 1) ?
+ sizeoflast : HNS3_MAX_BD_SIZE,
+ dma + HNS3_MAX_BD_SIZE * k,
+ frag_end && (k == frag_buf_num - 1) ? 1 : 0,
+ (type == DESC_TYPE_SKB && !k) ?
+ DESC_TYPE_SKB : DESC_TYPE_PAGE);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
+ struct hns3_enet_ring *ring)
+{
+ struct sk_buff *skb = *out_skb;
+ struct skb_frag_struct *frag;
+ int bdnum_for_frag;
+ int frag_num;
+ int buf_num;
+ int size;
+ int i;
+
+ size = skb_headlen(skb);
+ buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
+
+ frag_num = skb_shinfo(skb)->nr_frags;
+ for (i = 0; i < frag_num; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ size = skb_frag_size(frag);
+ bdnum_for_frag =
+ (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
+ if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
+ return -ENOMEM;
+
+ buf_num += bdnum_for_frag;
+ }
+
+ if (buf_num > ring_space(ring))
+ return -EBUSY;
+
+ *bnum = buf_num;
+ return 0;
+}
+
+static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
+ struct hns3_enet_ring *ring)
+{
+ struct sk_buff *skb = *out_skb;
+ int buf_num;
+
+ /* No. of segments (plus a header) */
+ buf_num = skb_shinfo(skb)->nr_frags + 1;
+
+ if (buf_num > ring_space(ring))
+ return -EBUSY;
+
+ *bnum = buf_num;
+
+ return 0;
+}
+
+static void hns_nic_dma_unmap(struct hns3_enet_ring *ring, int next_to_use_orig)
+{
+ struct device *dev = ring_to_dev(ring);
+ unsigned int i;
+
+ for (i = 0; i < ring->desc_num; i++) {
+ /* check if this is where we started */
+ if (ring->next_to_use == next_to_use_orig)
+ break;
+
+ /* unmap the descriptor dma address */
+ if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
+ dma_unmap_single(dev,
+ ring->desc_cb[ring->next_to_use].dma,
+ ring->desc_cb[ring->next_to_use].length,
+ DMA_TO_DEVICE);
+ else
+ dma_unmap_page(dev,
+ ring->desc_cb[ring->next_to_use].dma,
+ ring->desc_cb[ring->next_to_use].length,
+ DMA_TO_DEVICE);
+
+ /* rollback one */
+ ring_ptr_move_bw(ring, next_to_use);
+ }
+}
+
+static netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb,
+ struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hns3_nic_ring_data *ring_data =
+ &tx_ring_data(priv, skb->queue_mapping);
+ struct hns3_enet_ring *ring = ring_data->ring;
+ struct device *dev = priv->dev;
+ struct netdev_queue *dev_queue;
+ struct skb_frag_struct *frag;
+ int next_to_use_head;
+ int next_to_use_frag;
+ dma_addr_t dma;
+ int buf_num;
+ int seg_num;
+ int size;
+ int ret;
+ int i;
+
+ /* Prefetch the data used later */
+ prefetch(skb->data);
+
+ switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
+ case -EBUSY:
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.tx_busy++;
+ u64_stats_update_end(&ring->syncp);
+
+ goto out_net_tx_busy;
+ case -ENOMEM:
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.sw_err_cnt++;
+ u64_stats_update_end(&ring->syncp);
+ netdev_err(netdev, "no memory to xmit!\n");
+
+ goto out_err_tx_ok;
+ default:
+ break;
+ }
+
+ /* No. of segments (plus a header) */
+ seg_num = skb_shinfo(skb)->nr_frags + 1;
+ /* Fill the first part */
+ size = skb_headlen(skb);
+
+ next_to_use_head = ring->next_to_use;
+
+ dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, dma)) {
+ netdev_err(netdev, "TX head DMA map failed\n");
+ ring->stats.sw_err_cnt++;
+ goto out_err_tx_ok;
+ }
+
+ ret = priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
+ DESC_TYPE_SKB);
+ if (ret)
+ goto head_dma_map_err;
+
+ next_to_use_frag = ring->next_to_use;
+ /* Fill the fragments */
+ for (i = 1; i < seg_num; i++) {
+ frag = &skb_shinfo(skb)->frags[i - 1];
+ size = skb_frag_size(frag);
+ dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
+ if (dma_mapping_error(dev, dma)) {
+ netdev_err(netdev, "TX frag(%d) DMA map failed\n", i);
+ ring->stats.sw_err_cnt++;
+ goto frag_dma_map_err;
+ }
+ ret = priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
+ seg_num - 1 == i ? 1 : 0,
+ DESC_TYPE_PAGE);
+
+ if (ret)
+ goto frag_dma_map_err;
+ }
+
+ /* Complete translate all packets */
+ dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
+ netdev_tx_sent_queue(dev_queue, skb->len);
+
+ wmb(); /* Commit all data before submit */
+
+ hnae_queue_xmit(ring->tqp, buf_num);
+
+ return NETDEV_TX_OK;
+
+frag_dma_map_err:
+ hns_nic_dma_unmap(ring, next_to_use_frag);
+
+head_dma_map_err:
+ hns_nic_dma_unmap(ring, next_to_use_head);
+
+out_err_tx_ok:
+ dev_kfree_skb_any(skb);
+ return NETDEV_TX_OK;
+
+out_net_tx_busy:
+ netif_stop_subqueue(netdev, ring_data->queue_index);
+ smp_mb(); /* Commit all data before submit */
+
+ return NETDEV_TX_BUSY;
+}
+
+static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ struct sockaddr *mac_addr = p;
+ int ret;
+
+ if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
+ return -EADDRNOTAVAIL;
+
+ ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data);
+ if (ret) {
+ netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
+ return ret;
+ }
+
+ ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
+
+ return 0;
+}
+
+static int hns3_nic_set_features(struct net_device *netdev,
+ netdev_features_t features)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+
+ if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
+ priv->ops.fill_desc = hns3_fill_desc_tso;
+ priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
+ } else {
+ priv->ops.fill_desc = hns3_fill_desc;
+ priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
+ }
+
+ netdev->features = features;
+ return 0;
+}
+
+static void
+hns3_nic_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ int queue_num = priv->ae_handle->kinfo.num_tqps;
+ struct hns3_enet_ring *ring;
+ unsigned int start;
+ unsigned int idx;
+ u64 tx_bytes = 0;
+ u64 rx_bytes = 0;
+ u64 tx_pkts = 0;
+ u64 rx_pkts = 0;
+
+ for (idx = 0; idx < queue_num; idx++) {
+ /* fetch the tx stats */
+ ring = priv->ring_data[idx].ring;
+ do {
+ tx_bytes += ring->stats.tx_bytes;
+ tx_pkts += ring->stats.tx_pkts;
+ } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+
+ /* fetch the rx stats */
+ ring = priv->ring_data[idx + queue_num].ring;
+ do {
+ rx_bytes += ring->stats.rx_bytes;
+ rx_pkts += ring->stats.rx_pkts;
+ } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
+ }
+
+ stats->tx_bytes = tx_bytes;
+ stats->tx_packets = tx_pkts;
+ stats->rx_bytes = rx_bytes;
+ stats->rx_packets = rx_pkts;
+
+ stats->rx_errors = netdev->stats.rx_errors;
+ stats->multicast = netdev->stats.multicast;
+ stats->rx_length_errors = netdev->stats.rx_length_errors;
+ stats->rx_crc_errors = netdev->stats.rx_crc_errors;
+ stats->rx_missed_errors = netdev->stats.rx_missed_errors;
+
+ stats->tx_errors = netdev->stats.tx_errors;
+ stats->rx_dropped = netdev->stats.rx_dropped;
+ stats->tx_dropped = netdev->stats.tx_dropped;
+ stats->collisions = netdev->stats.collisions;
+ stats->rx_over_errors = netdev->stats.rx_over_errors;
+ stats->rx_frame_errors = netdev->stats.rx_frame_errors;
+ stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
+ stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
+ stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
+ stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
+ stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
+ stats->tx_window_errors = netdev->stats.tx_window_errors;
+ stats->rx_compressed = netdev->stats.rx_compressed;
+ stats->tx_compressed = netdev->stats.tx_compressed;
+}
+
+static void hns3_add_tunnel_port(struct net_device *netdev, u16 port,
+ enum hns3_udp_tnl_type type)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hns3_udp_tunnel *udp_tnl = &priv->udp_tnl[type];
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (udp_tnl->used && udp_tnl->dst_port == port) {
+ udp_tnl->used++;
+ return;
+ }
+
+ if (udp_tnl->used) {
+ netdev_warn(netdev,
+ "UDP tunnel [%d], port [%d] offload\n", type, port);
+ return;
+ }
+
+ udp_tnl->dst_port = port;
+ udp_tnl->used = 1;
+ /* TBD send command to hardware to add port */
+ if (h->ae_algo->ops->add_tunnel_udp)
+ h->ae_algo->ops->add_tunnel_udp(h, port);
+}
+
+static void hns3_del_tunnel_port(struct net_device *netdev, u16 port,
+ enum hns3_udp_tnl_type type)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hns3_udp_tunnel *udp_tnl = &priv->udp_tnl[type];
+ struct hnae3_handle *h = priv->ae_handle;
+
+ if (!udp_tnl->used || udp_tnl->dst_port != port) {
+ netdev_warn(netdev,
+ "Invalid UDP tunnel port %d\n", port);
+ return;
+ }
+
+ udp_tnl->used--;
+ if (udp_tnl->used)
+ return;
+
+ udp_tnl->dst_port = 0;
+ /* TBD send command to hardware to del port */
+ if (h->ae_algo->ops->del_tunnel_udp)
+ h->ae_algo->ops->add_tunnel_udp(h, port);
+}
+
+/* hns3_nic_udp_tunnel_add - Get notifiacetion about UDP tunnel ports
+ * @netdev: This physical ports's netdev
+ * @ti: Tunnel information
+ */
+static void hns3_nic_udp_tunnel_add(struct net_device *netdev,
+ struct udp_tunnel_info *ti)
+{
+ u16 port_n = ntohs(ti->port);
+
+ switch (ti->type) {
+ case UDP_TUNNEL_TYPE_VXLAN:
+ hns3_add_tunnel_port(netdev, port_n, HNS3_UDP_TNL_VXLAN);
+ break;
+ case UDP_TUNNEL_TYPE_GENEVE:
+ hns3_add_tunnel_port(netdev, port_n, HNS3_UDP_TNL_GENEVE);
+ break;
+ default:
+ netdev_err(netdev, "unsupported tunnel type %d\n", ti->type);
+ break;
+ }
+}
+
+static void hns3_nic_udp_tunnel_del(struct net_device *netdev,
+ struct udp_tunnel_info *ti)
+{
+ u16 port_n = ntohs(ti->port);
+
+ switch (ti->type) {
+ case UDP_TUNNEL_TYPE_VXLAN:
+ hns3_del_tunnel_port(netdev, port_n, HNS3_UDP_TNL_VXLAN);
+ break;
+ case UDP_TUNNEL_TYPE_GENEVE:
+ hns3_del_tunnel_port(netdev, port_n, HNS3_UDP_TNL_GENEVE);
+ break;
+ default:
+ break;
+ }
+}
+
+static int hns3_setup_tc(struct net_device *netdev, u8 tc)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ struct hnae3_knic_private_info *kinfo = &h->kinfo;
+ unsigned int i;
+ int ret;
+
+ if (tc > HNAE3_MAX_TC)
+ return -EINVAL;
+
+ if (kinfo->num_tc == tc)
+ return 0;
+
+ if (!netdev)
+ return -EINVAL;
+
+ if (!tc) {
+ netdev_reset_tc(netdev);
+ return 0;
+ }
+
+ /* Set num_tc for netdev */
+ ret = netdev_set_num_tc(netdev, tc);
+ if (ret)
+ return ret;
+
+ /* Set per TC queues for the VSI */
+ for (i = 0; i < HNAE3_MAX_TC; i++) {
+ if (kinfo->tc_info[i].enable)
+ netdev_set_tc_queue(netdev,
+ kinfo->tc_info[i].tc,
+ kinfo->tc_info[i].tqp_count,
+ kinfo->tc_info[i].tqp_offset);
+ }
+
+ return 0;
+}
+
+static int hns3_nic_setup_tc(struct net_device *dev, u32 handle,
+ u32 chain_index, __be16 protocol,
+ struct tc_to_netdev *tc)
+{
+ if (handle != TC_H_ROOT || tc->type != TC_SETUP_MQPRIO)
+ return -EINVAL;
+
+ return hns3_setup_tc(dev, tc->mqprio->num_tc);
+}
+
+static int hns3_vlan_rx_add_vid(struct net_device *netdev,
+ __be16 proto, u16 vid)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ int ret = -EIO;
+
+ if (h->ae_algo->ops->set_vlan_filter)
+ ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
+
+ return ret;
+}
+
+static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
+ __be16 proto, u16 vid)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ int ret = -EIO;
+
+ if (h->ae_algo->ops->set_vlan_filter)
+ ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
+
+ return ret;
+}
+
+static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
+ u8 qos, __be16 vlan_proto)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ int ret = -EIO;
+
+ if (h->ae_algo->ops->set_vf_vlan_filter)
+ ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
+ qos, vlan_proto);
+
+ return ret;
+}
+
+static const struct net_device_ops hns3_nic_netdev_ops = {
+ .ndo_open = hns3_nic_net_open,
+ .ndo_stop = hns3_nic_net_stop,
+ .ndo_start_xmit = hns3_nic_net_xmit,
+ .ndo_set_mac_address = hns3_nic_net_set_mac_address,
+ .ndo_set_features = hns3_nic_set_features,
+ .ndo_get_stats64 = hns3_nic_get_stats64,
+ .ndo_setup_tc = hns3_nic_setup_tc,
+ .ndo_set_rx_mode = hns3_nic_set_rx_mode,
+ .ndo_udp_tunnel_add = hns3_nic_udp_tunnel_add,
+ .ndo_udp_tunnel_del = hns3_nic_udp_tunnel_del,
+ .ndo_vlan_rx_add_vid = hns3_vlan_rx_add_vid,
+ .ndo_vlan_rx_kill_vid = hns3_vlan_rx_kill_vid,
+ .ndo_set_vf_vlan = hns3_ndo_set_vf_vlan,
+};
+
+/* hns3_probe - Device initialization routine
+ * @pdev: PCI device information struct
+ * @ent: entry in hns3_pci_tbl
+ *
+ * hns3_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 hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+ struct hnae3_ae_dev *ae_dev;
+ int ret;
+
+ ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
+ GFP_KERNEL);
+ if (!ae_dev) {
+ ret = -ENOMEM;
+ return ret;
+ }
+
+ ae_dev->pdev = pdev;
+ ae_dev->dev_type = HNAE3_DEV_KNIC;
+ pci_set_drvdata(pdev, ae_dev);
+
+ return hnae3_register_ae_dev(ae_dev);
+}
+
+/* hns3_remove - Device removal routine
+ * @pdev: PCI device information struct
+ */
+static void hns3_remove(struct pci_dev *pdev)
+{
+ struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
+
+ hnae3_unregister_ae_dev(ae_dev);
+
+ devm_kfree(&pdev->dev, ae_dev);
+
+ pci_set_drvdata(pdev, NULL);
+}
+
+static struct pci_driver hns3_driver = {
+ .name = hns3_driver_name,
+ .id_table = hns3_pci_tbl,
+ .probe = hns3_probe,
+ .remove = hns3_remove,
+};
+
+/* set default feature to hns3 */
+static void hns3_set_default_feature(struct net_device *netdev)
+{
+ netdev->priv_flags |= IFF_UNICAST_FLT;
+
+ netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+ NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
+ NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
+ NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
+
+ netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
+
+ netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
+
+ netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+ NETIF_F_HW_VLAN_CTAG_FILTER |
+ NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
+ NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
+ NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
+
+ netdev->vlan_features |=
+ NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
+ NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
+ NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
+ NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
+
+ netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
+ NETIF_F_HW_VLAN_CTAG_FILTER |
+ NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
+ NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
+ NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_GSO_UDP_TUNNEL_CSUM;
+}
+
+static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
+ struct hns3_desc_cb *cb)
+{
+ unsigned int order = hnae_page_order(ring);
+ struct page *p;
+
+ p = dev_alloc_pages(order);
+ if (!p)
+ return -ENOMEM;
+
+ cb->priv = p;
+ cb->page_offset = 0;
+ cb->reuse_flag = 0;
+ cb->buf = page_address(p);
+ cb->length = hnae_page_size(ring);
+ cb->type = DESC_TYPE_PAGE;
+
+ memset(cb->buf, 0, cb->length);
+
+ return 0;
+}
+
+static void hns3_free_buffer(struct hns3_enet_ring *ring,
+ struct hns3_desc_cb *cb)
+{
+ if (cb->type == DESC_TYPE_SKB)
+ dev_kfree_skb_any((struct sk_buff *)cb->priv);
+ else if (!HNAE3_IS_TX_RING(ring))
+ put_page((struct page *)cb->priv);
+ memset(cb, 0, sizeof(*cb));
+}
+
+static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
+{
+ cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
+ cb->length, ring_to_dma_dir(ring));
+
+ if (dma_mapping_error(ring_to_dev(ring), cb->dma))
+ return -EIO;
+
+ return 0;
+}
+
+static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
+ struct hns3_desc_cb *cb)
+{
+ if (cb->type == DESC_TYPE_SKB)
+ dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
+ ring_to_dma_dir(ring));
+ else
+ dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
+ ring_to_dma_dir(ring));
+}
+
+static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
+{
+ hns3_unmap_buffer(ring, &ring->desc_cb[i]);
+ ring->desc[i].addr = 0;
+}
+
+static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
+{
+ struct hns3_desc_cb *cb = &ring->desc_cb[i];
+
+ if (!ring->desc_cb[i].dma)
+ return;
+
+ hns3_buffer_detach(ring, i);
+ hns3_free_buffer(ring, cb);
+}
+
+static void hns3_free_buffers(struct hns3_enet_ring *ring)
+{
+ int i;
+
+ for (i = 0; i < ring->desc_num; i++)
+ hns3_free_buffer_detach(ring, i);
+}
+
+/* free desc along with its attached buffer */
+static void hns3_free_desc(struct hns3_enet_ring *ring)
+{
+ hns3_free_buffers(ring);
+
+ dma_unmap_single(ring_to_dev(ring), ring->desc_dma_addr,
+ ring->desc_num * sizeof(ring->desc[0]),
+ DMA_BIDIRECTIONAL);
+ ring->desc_dma_addr = 0;
+ kfree(ring->desc);
+ ring->desc = NULL;
+}
+
+static int hns3_alloc_desc(struct hns3_enet_ring *ring)
+{
+ int size = ring->desc_num * sizeof(ring->desc[0]);
+
+ ring->desc = kzalloc(size, GFP_KERNEL);
+ if (!ring->desc)
+ return -ENOMEM;
+
+ ring->desc_dma_addr = dma_map_single(ring_to_dev(ring), ring->desc,
+ size, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(ring_to_dev(ring), ring->desc_dma_addr)) {
+ ring->desc_dma_addr = 0;
+ kfree(ring->desc);
+ ring->desc = NULL;
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
+ struct hns3_desc_cb *cb)
+{
+ int ret;
+
+ ret = hns3_alloc_buffer(ring, cb);
+ if (ret)
+ goto out;
+
+ ret = hns3_map_buffer(ring, cb);
+ if (ret)
+ goto out_with_buf;
+
+ return 0;
+
+out_with_buf:
+ hns3_free_buffers(ring);
+out:
+ return ret;
+}
+
+static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
+{
+ int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
+
+ if (ret)
+ return ret;
+
+ ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
+
+ return 0;
+}
+
+/* Allocate memory for raw pkg, and map with dma */
+static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
+{
+ int i, j, ret;
+
+ for (i = 0; i < ring->desc_num; i++) {
+ ret = hns3_alloc_buffer_attach(ring, i);
+ if (ret)
+ goto out_buffer_fail;
+ }
+
+ return 0;
+
+out_buffer_fail:
+ for (j = i - 1; j >= 0; j--)
+ hns3_free_buffer_detach(ring, j);
+ return ret;
+}
+
+/* detach a in-used buffer and replace with a reserved one */
+static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
+ struct hns3_desc_cb *res_cb)
+{
+ hns3_map_buffer(ring, &ring->desc_cb[i]);
+ ring->desc_cb[i] = *res_cb;
+ ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
+}
+
+static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
+{
+ ring->desc_cb[i].reuse_flag = 0;
+ ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
+ + ring->desc_cb[i].page_offset);
+}
+
+static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
+ int *pkts)
+{
+ struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
+
+ (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
+ (*bytes) += desc_cb->length;
+ /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
+ hns3_free_buffer_detach(ring, ring->next_to_clean);
+
+ ring_ptr_move_fw(ring, next_to_clean);
+}
+
+static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
+{
+ int u = ring->next_to_use;
+ int c = ring->next_to_clean;
+
+ if (unlikely(h > ring->desc_num))
+ return 0;
+
+ return u > c ? (h > c && h <= u) : (h > c || h <= u);
+}
+
+int hns3_clean_tx_ring(struct hns3_enet_ring *ring, int budget)
+{
+ struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct netdev_queue *dev_queue;
+ int bytes, pkts;
+ int head;
+
+ head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
+ rmb(); /* Make sure head is ready before touch any data */
+
+ if (is_ring_empty(ring) || head == ring->next_to_clean)
+ return 0; /* no data to poll */
+
+ if (!is_valid_clean_head(ring, head)) {
+ netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
+ ring->next_to_use, ring->next_to_clean);
+
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.io_err_cnt++;
+ u64_stats_update_end(&ring->syncp);
+ return -EIO;
+ }
+
+ bytes = 0;
+ pkts = 0;
+ while (head != ring->next_to_clean && budget) {
+ hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
+ /* Issue prefetch for next Tx descriptor */
+ prefetch(&ring->desc_cb[ring->next_to_clean]);
+ budget--;
+ }
+
+ ring->tqp_vector->tx_group.total_bytes += bytes;
+ ring->tqp_vector->tx_group.total_packets += pkts;
+
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.tx_bytes += bytes;
+ ring->stats.tx_pkts += pkts;
+ u64_stats_update_end(&ring->syncp);
+
+ dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
+ netdev_tx_completed_queue(dev_queue, pkts, bytes);
+
+ if (unlikely(pkts && netif_carrier_ok(netdev) &&
+ (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
+ /* Make sure that anybody stopping the queue after this
+ * sees the new next_to_clean.
+ */
+ smp_mb();
+ if (netif_tx_queue_stopped(dev_queue)) {
+ netif_tx_wake_queue(dev_queue);
+ ring->stats.restart_queue++;
+ }
+ }
+
+ return !!budget;
+}
+
+static int hns3_desc_unused(struct hns3_enet_ring *ring)
+{
+ int ntc = ring->next_to_clean;
+ int ntu = ring->next_to_use;
+
+ return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
+}
+
+static void
+hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
+{
+ struct hns3_desc_cb *desc_cb;
+ struct hns3_desc_cb res_cbs;
+ int i, ret;
+
+ for (i = 0; i < cleand_count; i++) {
+ desc_cb = &ring->desc_cb[ring->next_to_use];
+ if (desc_cb->reuse_flag) {
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.reuse_pg_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ hns3_reuse_buffer(ring, ring->next_to_use);
+ } else {
+ ret = hns3_reserve_buffer_map(ring, &res_cbs);
+ if (ret) {
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.sw_err_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ netdev_err(ring->tqp->handle->kinfo.netdev,
+ "hnae reserve buffer map failed.\n");
+ break;
+ }
+ hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
+ }
+
+ ring_ptr_move_fw(ring, next_to_use);
+ }
+
+ wmb(); /* Make all data has been write before submit */
+ writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
+}
+
+/* hns3_nic_get_headlen - determine size of header for LRO/GRO
+ * @data: pointer to the start of the headers
+ * @max: total length of section to find headers in
+ *
+ * This function is meant to determine the length of headers that will
+ * be recognized by hardware for LRO, GRO, and RSC offloads. The main
+ * motivation of doing this is to only perform one pull for IPv4 TCP
+ * packets so that we can do basic things like calculating the gso_size
+ * based on the average data per packet.
+ */
+static unsigned int hns3_nic_get_headlen(unsigned char *data, u32 flag,
+ unsigned int max_size)
+{
+ unsigned char *network;
+ u8 hlen;
+
+ /* This should never happen, but better safe than sorry */
+ if (max_size < ETH_HLEN)
+ return max_size;
+
+ /* Initialize network frame pointer */
+ network = data;
+
+ /* Set first protocol and move network header forward */
+ network += ETH_HLEN;
+
+ /* Handle any vlan tag if present */
+ if (hnae_get_field(flag, HNS3_RXD_VLAN_M, HNS3_RXD_VLAN_S)
+ == HNS3_RX_FLAG_VLAN_PRESENT) {
+ if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
+ return max_size;
+
+ network += VLAN_HLEN;
+ }
+
+ /* Handle L3 protocols */
+ if (hnae_get_field(flag, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S)
+ == HNS3_RX_FLAG_L3ID_IPV4) {
+ if ((typeof(max_size))(network - data) >
+ (max_size - sizeof(struct iphdr)))
+ return max_size;
+
+ /* Access ihl as a u8 to avoid unaligned access on ia64 */
+ hlen = (network[0] & 0x0F) << 2;
+
+ /* Verify hlen meets minimum size requirements */
+ if (hlen < sizeof(struct iphdr))
+ return network - data;
+
+ /* Record next protocol if header is present */
+ } else if (hnae_get_field(flag, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S)
+ == HNS3_RX_FLAG_L3ID_IPV6) {
+ if ((typeof(max_size))(network - data) >
+ (max_size - sizeof(struct ipv6hdr)))
+ return max_size;
+
+ /* Record next protocol */
+ hlen = sizeof(struct ipv6hdr);
+ } else {
+ return network - data;
+ }
+
+ /* Relocate pointer to start of L4 header */
+ network += hlen;
+
+ /* Finally sort out TCP/UDP */
+ if (hnae_get_field(flag, HNS3_RXD_L4ID_M, HNS3_RXD_L4ID_S)
+ == HNS3_RX_FLAG_L4ID_TCP) {
+ if ((typeof(max_size))(network - data) >
+ (max_size - sizeof(struct tcphdr)))
+ return max_size;
+
+ /* Access doff as a u8 to avoid unaligned access on ia64 */
+ hlen = (network[12] & 0xF0) >> 2;
+
+ /* Verify hlen meets minimum size requirements */
+ if (hlen < sizeof(struct tcphdr))
+ return network - data;
+
+ network += hlen;
+ } else if (hnae_get_field(flag, HNS3_RXD_L4ID_M, HNS3_RXD_L4ID_S)
+ == HNS3_RX_FLAG_L4ID_UDP) {
+ if ((typeof(max_size))(network - data) >
+ (max_size - sizeof(struct udphdr)))
+ return max_size;
+
+ network += sizeof(struct udphdr);
+ }
+
+ /* If everything has gone correctly network should be the
+ * data section of the packet and will be the end of the header.
+ * If not then it probably represents the end of the last recognized
+ * header.
+ */
+ if ((typeof(max_size))(network - data) < max_size)
+ return network - data;
+ else
+ return max_size;
+}
+
+static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
+ struct hns3_enet_ring *ring, int pull_len,
+ struct hns3_desc_cb *desc_cb)
+{
+ struct hns3_desc *desc;
+ int truesize, size;
+ int last_offset;
+ bool twobufs;
+
+ twobufs = ((PAGE_SIZE < 8192) &&
+ hnae_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
+
+ desc = &ring->desc[ring->next_to_clean];
+ size = le16_to_cpu(desc->rx.size);
+
+ if (twobufs) {
+ truesize = hnae_buf_size(ring);
+ } else {
+ truesize = ALIGN(size, L1_CACHE_BYTES);
+ last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
+ }
+
+ skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
+ size - pull_len, truesize - pull_len);
+
+ /* Avoid re-using remote pages,flag default unreuse */
+ if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
+ return;
+
+ if (twobufs) {
+ /* If we are only owner of page we can reuse it */
+ if (likely(page_count(desc_cb->priv) == 1)) {
+ /* Flip page offset to other buffer */
+ desc_cb->page_offset ^= truesize;
+
+ desc_cb->reuse_flag = 1;
+ /* bump ref count on page before it is given*/
+ get_page(desc_cb->priv);
+ }
+ return;
+ }
+
+ /* Move offset up to the next cache line */
+ desc_cb->page_offset += truesize;
+
+ if (desc_cb->page_offset <= last_offset) {
+ desc_cb->reuse_flag = 1;
+ /* Bump ref count on page before it is given*/
+ get_page(desc_cb->priv);
+ }
+}
+
+static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
+ struct hns3_desc *desc)
+{
+ struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ int l3_type, l4_type;
+ u32 bd_base_info;
+ int ol4_type;
+ u32 l234info;
+
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ l234info = le32_to_cpu(desc->rx.l234_info);
+
+ skb->ip_summed = CHECKSUM_NONE;
+
+ skb_checksum_none_assert(skb);
+
+ if (!(netdev->features & NETIF_F_RXCSUM))
+ return;
+
+ /* check if hardware has done checksum */
+ if (!hnae_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
+ return;
+
+ if (unlikely(hnae_get_bit(l234info, HNS3_RXD_L3E_B) ||
+ hnae_get_bit(l234info, HNS3_RXD_L4E_B) ||
+ hnae_get_bit(l234info, HNS3_RXD_OL3E_B) ||
+ hnae_get_bit(l234info, HNS3_RXD_OL4E_B))) {
+ netdev_err(netdev, "L3/L4 error pkt\n");
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.l3l4_csum_err++;
+ u64_stats_update_end(&ring->syncp);
+
+ return;
+ }
+
+ l3_type = hnae_get_field(l234info, HNS3_RXD_L3ID_M,
+ HNS3_RXD_L3ID_S);
+ l4_type = hnae_get_field(l234info, HNS3_RXD_L4ID_M,
+ HNS3_RXD_L4ID_S);
+
+ ol4_type = hnae_get_field(l234info, HNS3_RXD_OL4ID_M, HNS3_RXD_OL4ID_S);
+ switch (ol4_type) {
+ case HNS3_OL4_TYPE_MAC_IN_UDP:
+ case HNS3_OL4_TYPE_NVGRE:
+ skb->csum_level = 1;
+ case HNS3_OL4_TYPE_NO_TUN:
+ /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
+ if (l3_type == HNS3_L3_TYPE_IPV4 ||
+ (l3_type == HNS3_L3_TYPE_IPV6 &&
+ (l4_type == HNS3_L4_TYPE_UDP ||
+ l4_type == HNS3_L4_TYPE_TCP ||
+ l4_type == HNS3_L4_TYPE_SCTP)))
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ break;
+ }
+}
+
+static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
+ struct sk_buff **out_skb, int *out_bnum)
+{
+ struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct hns3_desc_cb *desc_cb;
+ struct hns3_desc *desc;
+ struct sk_buff *skb;
+ unsigned char *va;
+ u32 bd_base_info;
+ int pull_len;
+ u32 l234info;
+ int length;
+ int bnum;
+
+ desc = &ring->desc[ring->next_to_clean];
+ desc_cb = &ring->desc_cb[ring->next_to_clean];
+
+ prefetch(desc);
+
+ length = le16_to_cpu(desc->rx.pkt_len);
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ l234info = le32_to_cpu(desc->rx.l234_info);
+
+ /* Check valid BD */
+ if (!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B))
+ return -EFAULT;
+
+ va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
+
+ /* Prefetch first cache line of first page
+ * Idea is to cache few bytes of the header of the packet. Our L1 Cache
+ * line size is 64B so need to prefetch twice to make it 128B. But in
+ * actual we can have greater size of caches with 128B Level 1 cache
+ * lines. In such a case, single fetch would suffice to cache in the
+ * relevant part of the header.
+ */
+ prefetch(va);
+#if L1_CACHE_BYTES < 128
+ prefetch(va + L1_CACHE_BYTES);
+#endif
+
+ skb = *out_skb = napi_alloc_skb(&ring->tqp_vector->napi,
+ HNS3_RX_HEAD_SIZE);
+ if (unlikely(!skb)) {
+ netdev_err(netdev, "alloc rx skb fail\n");
+
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.sw_err_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ return -ENOMEM;
+ }
+
+ prefetchw(skb->data);
+
+ bnum = 1;
+ if (length <= HNS3_RX_HEAD_SIZE) {
+ memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
+
+ /* We can reuse buffer as-is, just make sure it is local */
+ if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
+ desc_cb->reuse_flag = 1;
+ else /* This page cannot be reused so discard it */
+ put_page(desc_cb->priv);
+
+ ring_ptr_move_fw(ring, next_to_clean);
+ } else {
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.seg_pkt_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ pull_len = hns3_nic_get_headlen(va, l234info,
+ HNS3_RX_HEAD_SIZE);
+ memcpy(__skb_put(skb, pull_len), va,
+ ALIGN(pull_len, sizeof(long)));
+
+ hns3_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
+ ring_ptr_move_fw(ring, next_to_clean);
+
+ while (!hnae_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
+ desc = &ring->desc[ring->next_to_clean];
+ desc_cb = &ring->desc_cb[ring->next_to_clean];
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ hns3_nic_reuse_page(skb, bnum, ring, 0, desc_cb);
+ ring_ptr_move_fw(ring, next_to_clean);
+ bnum++;
+ }
+ }
+
+ *out_bnum = bnum;
+
+ if (unlikely(!hnae_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
+ netdev_err(netdev, "no valid bd,%016llx,%016llx\n",
+ ((u64 *)desc)[0], ((u64 *)desc)[1]);
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.non_vld_descs++;
+ u64_stats_update_end(&ring->syncp);
+
+ dev_kfree_skb_any(skb);
+ return -EINVAL;
+ }
+
+ if (unlikely((!desc->rx.pkt_len) ||
+ hnae_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
+ netdev_err(netdev, "truncated pkt\n");
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.err_pkt_len++;
+ u64_stats_update_end(&ring->syncp);
+
+ dev_kfree_skb_any(skb);
+ return -EFAULT;
+ }
+
+ if (unlikely(hnae_get_bit(l234info, HNS3_RXD_L2E_B))) {
+ netdev_err(netdev, "L2 error pkt\n");
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.l2_err++;
+ u64_stats_update_end(&ring->syncp);
+
+ dev_kfree_skb_any(skb);
+ return -EFAULT;
+ }
+
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.rx_pkts++;
+ ring->stats.rx_bytes += skb->len;
+ u64_stats_update_end(&ring->syncp);
+
+ ring->tqp_vector->rx_group.total_bytes += skb->len;
+
+ hns3_rx_checksum(ring, skb, desc);
+ return 0;
+}
+
+static int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget)
+{
+#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
+ struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ int recv_pkts, recv_bds, clean_count, err;
+ int unused_count = hns3_desc_unused(ring);
+ struct sk_buff *skb = NULL;
+ int num, bnum = 0;
+
+ num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
+ rmb(); /* Make sure num taken effect before the other data is touched */
+
+ recv_pkts = 0, recv_bds = 0, clean_count = 0;
+ num -= unused_count;
+
+ while (recv_pkts < budget && recv_bds < num) {
+ /* Reuse or realloc buffers */
+ if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
+ hns3_nic_alloc_rx_buffers(ring,
+ clean_count + unused_count);
+ clean_count = 0;
+ unused_count = hns3_desc_unused(ring);
+ }
+
+ /* Poll one pkt */
+ err = hns3_handle_rx_bd(ring, &skb, &bnum);
+ if (unlikely(!skb)) /* This fault cannot be repaired */
+ goto out;
+
+ recv_bds += bnum;
+ clean_count += bnum;
+ if (unlikely(err)) { /* Do jump the err */
+ recv_pkts++;
+ continue;
+ }
+
+ /* Do update ip stack process */
+ skb->protocol = eth_type_trans(skb, netdev);
+ (void)napi_gro_receive(&ring->tqp_vector->napi, skb);
+
+ recv_pkts++;
+ }
+
+out:
+ /* Make all data has been write before submit */
+ if (clean_count + unused_count > 0)
+ hns3_nic_alloc_rx_buffers(ring,
+ clean_count + unused_count);
+
+ return recv_pkts;
+}
+
+static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
+{
+#define HNS3_RX_ULTRA_PACKET_RATE 40000
+ enum hns3_flow_level_range new_flow_level;
+ struct hns3_enet_tqp_vector *tqp_vector;
+ int packets_per_secs;
+ int bytes_per_usecs;
+ u16 new_int_gl;
+ int usecs;
+
+ if (!ring_group->int_gl)
+ return false;
+
+ if (ring_group->total_packets == 0) {
+ ring_group->int_gl = HNS3_INT_GL_50K;
+ ring_group->flow_level = HNS3_FLOW_LOW;
+ return true;
+ }
+
+ /* Simple throttlerate management
+ * 0-10MB/s lower (50000 ints/s)
+ * 10-20MB/s middle (20000 ints/s)
+ * 20-1249MB/s high (18000 ints/s)
+ * > 40000pps ultra (8000 ints/s)
+ */
+ new_flow_level = ring_group->flow_level;
+ new_int_gl = ring_group->int_gl;
+ tqp_vector = ring_group->ring->tqp_vector;
+ usecs = (ring_group->int_gl << 1);
+ bytes_per_usecs = ring_group->total_bytes / usecs;
+ /* 1000000 microseconds */
+ packets_per_secs = ring_group->total_packets * 1000000 / usecs;
+
+ switch (new_flow_level) {
+ case HNS3_FLOW_LOW:
+ if (bytes_per_usecs > 10)
+ new_flow_level = HNS3_FLOW_MID;
+ break;
+ case HNS3_FLOW_MID:
+ if (bytes_per_usecs > 20)
+ new_flow_level = HNS3_FLOW_HIGH;
+ else if (bytes_per_usecs <= 10)
+ new_flow_level = HNS3_FLOW_LOW;
+ break;
+ case HNS3_FLOW_HIGH:
+ case HNS3_FLOW_ULTRA:
+ default:
+ if (bytes_per_usecs <= 20)
+ new_flow_level = HNS3_FLOW_MID;
+ break;
+ }
+
+ if ((packets_per_secs > HNS3_RX_ULTRA_PACKET_RATE) &&
+ (&tqp_vector->rx_group == ring_group))
+ new_flow_level = HNS3_FLOW_ULTRA;
+
+ switch (new_flow_level) {
+ case HNS3_FLOW_LOW:
+ new_int_gl = HNS3_INT_GL_50K;
+ break;
+ case HNS3_FLOW_MID:
+ new_int_gl = HNS3_INT_GL_20K;
+ break;
+ case HNS3_FLOW_HIGH:
+ new_int_gl = HNS3_INT_GL_18K;
+ break;
+ case HNS3_FLOW_ULTRA:
+ new_int_gl = HNS3_INT_GL_8K;
+ break;
+ default:
+ break;
+ }
+
+ ring_group->total_bytes = 0;
+ ring_group->total_packets = 0;
+ ring_group->flow_level = new_flow_level;
+ if (new_int_gl != ring_group->int_gl) {
+ ring_group->int_gl = new_int_gl;
+ return true;
+ }
+ return false;
+}
+
+static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
+{
+ u16 rx_int_gl, tx_int_gl;
+ bool rx, tx;
+
+ rx = hns3_get_new_int_gl(&tqp_vector->rx_group);
+ tx = hns3_get_new_int_gl(&tqp_vector->tx_group);
+ rx_int_gl = tqp_vector->rx_group.int_gl;
+ tx_int_gl = tqp_vector->tx_group.int_gl;
+ if (rx && tx) {
+ if (rx_int_gl > tx_int_gl) {
+ tqp_vector->tx_group.int_gl = rx_int_gl;
+ tqp_vector->tx_group.flow_level =
+ tqp_vector->rx_group.flow_level;
+ hns3_set_vector_coalesc_gl(tqp_vector, rx_int_gl);
+ } else {
+ tqp_vector->rx_group.int_gl = tx_int_gl;
+ tqp_vector->rx_group.flow_level =
+ tqp_vector->tx_group.flow_level;
+ hns3_set_vector_coalesc_gl(tqp_vector, tx_int_gl);
+ }
+ }
+}
+
+static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
+{
+ struct hns3_enet_ring *ring;
+ int rx_pkt_total = 0;
+
+ struct hns3_enet_tqp_vector *tqp_vector =
+ container_of(napi, struct hns3_enet_tqp_vector, napi);
+ bool clean_complete = true;
+ int rx_budget;
+
+ /* Since the actual Tx work is minimal, we can give the Tx a larger
+ * budget and be more aggressive about cleaning up the Tx descriptors.
+ */
+ hns3_for_each_ring(ring, tqp_vector->tx_group) {
+ if (!hns3_clean_tx_ring(ring, budget))
+ clean_complete = false;
+ }
+
+ /* make sure rx ring budget not smaller than 1 */
+ rx_budget = max(budget / tqp_vector->num_tqps, 1);
+
+ hns3_for_each_ring(ring, tqp_vector->rx_group) {
+ int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget);
+
+ if (rx_cleaned >= rx_budget)
+ clean_complete = false;
+
+ rx_pkt_total += rx_cleaned;
+ }
+
+ tqp_vector->rx_group.total_packets += rx_pkt_total;
+
+ if (!clean_complete)
+ return budget;
+
+ napi_complete(napi);
+ hns3_update_new_int_gl(tqp_vector);
+ hns3_mask_vector_irq(tqp_vector, 1);
+
+ return rx_pkt_total;
+}
+
+static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
+ struct hnae3_ring_chain_node *head)
+{
+ struct pci_dev *pdev = tqp_vector->handle->pdev;
+ struct hnae3_ring_chain_node *cur_chain = head;
+ struct hnae3_ring_chain_node *chain;
+ struct hns3_enet_ring *tx_ring;
+ struct hns3_enet_ring *rx_ring;
+
+ tx_ring = tqp_vector->tx_group.ring;
+ if (tx_ring) {
+ cur_chain->tqp_index = tx_ring->tqp->tqp_index;
+ hnae_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
+ HNAE3_RING_TYPE_TX);
+
+ cur_chain->next = NULL;
+
+ while (tx_ring->next) {
+ tx_ring = tx_ring->next;
+
+ chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
+ GFP_KERNEL);
+ if (!chain)
+ return -ENOMEM;
+
+ cur_chain->next = chain;
+ chain->tqp_index = tx_ring->tqp->tqp_index;
+ hnae_set_bit(chain->flag, HNAE3_RING_TYPE_B,
+ HNAE3_RING_TYPE_TX);
+
+ cur_chain = chain;
+ }
+ }
+
+ rx_ring = tqp_vector->rx_group.ring;
+ if (!tx_ring && rx_ring) {
+ cur_chain->next = NULL;
+ cur_chain->tqp_index = rx_ring->tqp->tqp_index;
+ hnae_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
+ HNAE3_RING_TYPE_RX);
+
+ rx_ring = rx_ring->next;
+ }
+
+ while (rx_ring) {
+ chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
+ if (!chain)
+ return -ENOMEM;
+
+ cur_chain->next = chain;
+ chain->tqp_index = rx_ring->tqp->tqp_index;
+ hnae_set_bit(chain->flag, HNAE3_RING_TYPE_B,
+ HNAE3_RING_TYPE_RX);
+ cur_chain = chain;
+
+ rx_ring = rx_ring->next;
+ }
+
+ return 0;
+}
+
+static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
+ struct hnae3_ring_chain_node *head)
+{
+ struct pci_dev *pdev = tqp_vector->handle->pdev;
+ struct hnae3_ring_chain_node *chain_tmp, *chain;
+
+ chain = head->next;
+
+ while (chain) {
+ chain_tmp = chain->next;
+ devm_kfree(&pdev->dev, chain);
+ chain = chain_tmp;
+ }
+}
+
+static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
+ struct hns3_enet_ring *ring)
+{
+ ring->next = group->ring;
+ group->ring = ring;
+
+ group->count++;
+}
+
+static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
+{
+ struct hnae3_ring_chain_node vector_ring_chain;
+ struct hnae3_handle *h = priv->ae_handle;
+ struct hns3_enet_tqp_vector *tqp_vector;
+ struct hnae3_vector_info *vector;
+ struct pci_dev *pdev = h->pdev;
+ u16 tqp_num = h->kinfo.num_tqps;
+ u16 vector_num;
+ int ret = 0;
+ u16 i;
+
+ /* RSS size, cpu online and vector_num should be the same */
+ /* Should consider 2p/4p later */
+ vector_num = min_t(u16, num_online_cpus(), tqp_num);
+ vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
+ GFP_KERNEL);
+ if (!vector)
+ return -ENOMEM;
+
+ vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
+
+ priv->vector_num = vector_num;
+ priv->tqp_vector = (struct hns3_enet_tqp_vector *)
+ devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
+ GFP_KERNEL);
+ if (!priv->tqp_vector)
+ return -ENOMEM;
+
+ for (i = 0; i < tqp_num; i++) {
+ u16 vector_i = i % vector_num;
+
+ tqp_vector = &priv->tqp_vector[vector_i];
+
+ hns3_add_ring_to_group(&tqp_vector->tx_group,
+ priv->ring_data[i].ring);
+
+ hns3_add_ring_to_group(&tqp_vector->rx_group,
+ priv->ring_data[i + tqp_num].ring);
+
+ tqp_vector->idx = vector_i;
+ tqp_vector->mask_addr = vector[vector_i].io_addr;
+ tqp_vector->vector_irq = vector[vector_i].vector;
+ tqp_vector->num_tqps++;
+
+ priv->ring_data[i].ring->tqp_vector = tqp_vector;
+ priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
+ }
+
+ for (i = 0; i < vector_num; i++) {
+ tqp_vector = &priv->tqp_vector[i];
+
+ tqp_vector->rx_group.total_bytes = 0;
+ tqp_vector->rx_group.total_packets = 0;
+ tqp_vector->tx_group.total_bytes = 0;
+ tqp_vector->tx_group.total_packets = 0;
+ hns3_vector_gl_rl_init(tqp_vector);
+ tqp_vector->handle = h;
+
+ ret = hns3_get_vector_ring_chain(tqp_vector,
+ &vector_ring_chain);
+ if (ret)
+ goto out;
+
+ ret = h->ae_algo->ops->map_ring_to_vector(h,
+ tqp_vector->vector_irq, &vector_ring_chain);
+ if (ret)
+ goto out;
+
+ hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
+
+ netif_napi_add(priv->netdev, &tqp_vector->napi,
+ hns3_nic_common_poll, NAPI_POLL_WEIGHT);
+ }
+
+out:
+ devm_kfree(&pdev->dev, vector);
+ return ret;
+}
+
+static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
+{
+ struct hnae3_ring_chain_node vector_ring_chain;
+ struct hnae3_handle *h = priv->ae_handle;
+ struct hns3_enet_tqp_vector *tqp_vector;
+ struct pci_dev *pdev = h->pdev;
+ int i, ret;
+
+ for (i = 0; i < priv->vector_num; i++) {
+ tqp_vector = &priv->tqp_vector[i];
+
+ ret = hns3_get_vector_ring_chain(tqp_vector,
+ &vector_ring_chain);
+ if (ret)
+ return ret;
+
+ ret = h->ae_algo->ops->unmap_ring_from_vector(h,
+ tqp_vector->vector_irq, &vector_ring_chain);
+ if (ret)
+ return ret;
+
+ hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
+
+ if (priv->tqp_vector[i].irq_init_flag == HNS3_VECTOR_INITED) {
+ (void)irq_set_affinity_hint(
+ priv->tqp_vector[i].vector_irq,
+ NULL);
+ devm_free_irq(&pdev->dev,
+ priv->tqp_vector[i].vector_irq,
+ &priv->tqp_vector[i]);
+ }
+
+ priv->ring_data[i].ring->irq_init_flag = HNS3_VECTOR_NOT_INITED;
+
+ netif_napi_del(&priv->tqp_vector[i].napi);
+ }
+
+ devm_kfree(&pdev->dev, priv->tqp_vector);
+
+ return 0;
+}
+
+static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
+ int ring_type)
+{
+ struct hns3_nic_ring_data *ring_data = priv->ring_data;
+ int queue_num = priv->ae_handle->kinfo.num_tqps;
+ struct pci_dev *pdev = priv->ae_handle->pdev;
+ struct hns3_enet_ring *ring;
+
+ ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
+ if (!ring)
+ return -ENOMEM;
+
+ if (ring_type == HNAE3_RING_TYPE_TX) {
+ ring_data[q->tqp_index].ring = ring;
+ ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
+ } else {
+ ring_data[q->tqp_index + queue_num].ring = ring;
+ ring->io_base = q->io_base;
+ }
+
+ hnae_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
+
+ ring_data[q->tqp_index].queue_index = q->tqp_index;
+
+ ring->tqp = q;
+ ring->desc = NULL;
+ ring->desc_cb = NULL;
+ ring->dev = priv->dev;
+ ring->desc_dma_addr = 0;
+ ring->buf_size = q->buf_size;
+ ring->desc_num = q->desc_num;
+ ring->next_to_use = 0;
+ ring->next_to_clean = 0;
+
+ return 0;
+}
+
+static int hns3_queue_to_ring(struct hnae3_queue *tqp,
+ struct hns3_nic_priv *priv)
+{
+ int ret;
+
+ ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
+ if (ret)
+ return ret;
+
+ ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int hns3_get_ring_config(struct hns3_nic_priv *priv)
+{
+ struct hnae3_handle *h = priv->ae_handle;
+ struct pci_dev *pdev = h->pdev;
+ int i, ret;
+
+ priv->ring_data = devm_kzalloc(&pdev->dev, h->kinfo.num_tqps *
+ sizeof(*priv->ring_data) * 2,
+ GFP_KERNEL);
+ if (!priv->ring_data)
+ return -ENOMEM;
+
+ for (i = 0; i < h->kinfo.num_tqps; i++) {
+ ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
+ if (ret)
+ goto err;
+ }
+
+ return 0;
+err:
+ devm_kfree(&pdev->dev, priv->ring_data);
+ return ret;
+}
+
+static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
+{
+ int ret;
+
+ if (ring->desc_num <= 0 || ring->buf_size <= 0)
+ return -EINVAL;
+
+ ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
+ GFP_KERNEL);
+ if (!ring->desc_cb) {
+ ret = -ENOMEM;
+ goto out;
+ }
+
+ ret = hns3_alloc_desc(ring);
+ if (ret)
+ goto out_with_desc_cb;
+
+ if (!HNAE3_IS_TX_RING(ring)) {
+ ret = hns3_alloc_ring_buffers(ring);
+ if (ret)
+ goto out_with_desc;
+ }
+
+ return 0;
+
+out_with_desc:
+ hns3_free_desc(ring);
+out_with_desc_cb:
+ kfree(ring->desc_cb);
+ ring->desc_cb = NULL;
+out:
+ return ret;
+}
+
+static void hns3_fini_ring(struct hns3_enet_ring *ring)
+{
+ hns3_free_desc(ring);
+ kfree(ring->desc_cb);
+ ring->desc_cb = NULL;
+ ring->next_to_clean = 0;
+ ring->next_to_use = 0;
+}
+
+int hns3_buf_size2type(u32 buf_size)
+{
+ int bd_size_type;
+
+ switch (buf_size) {
+ case 512:
+ bd_size_type = HNS3_BD_SIZE_512_TYPE;
+ break;
+ case 1024:
+ bd_size_type = HNS3_BD_SIZE_1024_TYPE;
+ break;
+ case 2048:
+ bd_size_type = HNS3_BD_SIZE_2048_TYPE;
+ break;
+ case 4096:
+ bd_size_type = HNS3_BD_SIZE_4096_TYPE;
+ break;
+ default:
+ bd_size_type = HNS3_BD_SIZE_2048_TYPE;
+ }
+
+ return bd_size_type;
+}
+
+static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
+{
+ dma_addr_t dma = ring->desc_dma_addr;
+ struct hnae3_queue *q = ring->tqp;
+
+ if (!HNAE3_IS_TX_RING(ring)) {
+ hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
+ (u32)dma);
+ hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
+ (u32)((dma >> 31) >> 1));
+
+ hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
+ hns3_buf_size2type(ring->buf_size));
+ hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
+ ring->desc_num / 8 - 1);
+
+ } else {
+ hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
+ (u32)dma);
+ hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
+ (u32)((dma >> 31) >> 1));
+
+ hns3_write_dev(q, HNS3_RING_TX_RING_BD_LEN_REG,
+ hns3_buf_size2type(ring->buf_size));
+ hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
+ ring->desc_num / 8 - 1);
+ }
+}
+
+static int hns3_init_all_ring(struct hns3_nic_priv *priv)
+{
+ struct hnae3_handle *h = priv->ae_handle;
+ int ring_num = h->kinfo.num_tqps * 2;
+ int i, j;
+ int ret;
+
+ for (i = 0; i < ring_num; i++) {
+ ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
+ if (ret) {
+ dev_err(priv->dev,
+ "Alloc ring memory fail! ret=%d\n", ret);
+ goto out_when_alloc_ring_memory;
+ }
+
+ hns3_init_ring_hw(priv->ring_data[i].ring);
+
+ u64_stats_init(&priv->ring_data[i].ring->syncp);
+ }
+
+ return 0;
+
+out_when_alloc_ring_memory:
+ for (j = i - 1; j >= 0; j--)
+ hns3_fini_ring(priv->ring_data[i].ring);
+
+ return -ENOMEM;
+}
+
+static int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
+{
+ struct hnae3_handle *h = priv->ae_handle;
+ int i;
+
+ for (i = 0; i < h->kinfo.num_tqps; i++) {
+ if (h->ae_algo->ops->reset_queue)
+ h->ae_algo->ops->reset_queue(h, i);
+
+ hns3_fini_ring(priv->ring_data[i].ring);
+ hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
+ }
+
+ return 0;
+}
+
+/* Set mac addr if it is configured. or leave it to the AE driver */
+static void hns3_init_mac_addr(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ struct hnae3_handle *h = priv->ae_handle;
+ u8 mac_addr_temp[ETH_ALEN];
+
+ if (h->ae_algo->ops->get_mac_addr) {
+ h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
+ ether_addr_copy(netdev->dev_addr, mac_addr_temp);
+ }
+
+ /* Check if the MAC address is valid, if not get a random one */
+ if (!is_valid_ether_addr(netdev->dev_addr)) {
+ eth_hw_addr_random(netdev);
+ dev_warn(priv->dev, "using random MAC address %pM\n",
+ netdev->dev_addr);
+ /* Also copy this new MAC address into hdev */
+ if (h->ae_algo->ops->set_mac_addr)
+ h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr);
+ }
+}
+
+static void hns3_nic_set_priv_ops(struct net_device *netdev)
+{
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+
+ if ((netdev->features & NETIF_F_TSO) ||
+ (netdev->features & NETIF_F_TSO6)) {
+ priv->ops.fill_desc = hns3_fill_desc_tso;
+ priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
+ } else {
+ priv->ops.fill_desc = hns3_fill_desc;
+ priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
+ }
+}
+
+static int hns3_client_init(struct hnae3_handle *handle)
+{
+ struct pci_dev *pdev = handle->pdev;
+ struct hns3_nic_priv *priv;
+ struct net_device *netdev;
+ int ret;
+
+ netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv),
+ handle->kinfo.num_tqps);
+ if (!netdev)
+ return -ENOMEM;
+
+ priv = netdev_priv(netdev);
+ priv->dev = &pdev->dev;
+ priv->netdev = netdev;
+ priv->ae_handle = handle;
+
+ handle->kinfo.netdev = netdev;
+ handle->priv = (void *)priv;
+
+ hns3_init_mac_addr(netdev);
+
+ hns3_set_default_feature(netdev);
+
+ netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
+ netdev->priv_flags |= IFF_UNICAST_FLT;
+ netdev->netdev_ops = &hns3_nic_netdev_ops;
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+ hns3_ethtool_set_ops(netdev);
+ hns3_nic_set_priv_ops(netdev);
+
+ /* Carrier off reporting is important to ethtool even BEFORE open */
+ netif_carrier_off(netdev);
+
+ ret = hns3_get_ring_config(priv);
+ if (ret) {
+ ret = -ENOMEM;
+ goto out_get_ring_cfg;
+ }
+
+ ret = hns3_nic_init_vector_data(priv);
+ if (ret) {
+ ret = -ENOMEM;
+ goto out_init_vector_data;
+ }
+
+ ret = hns3_init_all_ring(priv);
+ if (ret) {
+ ret = -ENOMEM;
+ goto out_init_ring_data;
+ }
+
+ ret = register_netdev(netdev);
+ if (ret) {
+ dev_err(priv->dev, "probe register netdev fail!\n");
+ goto out_reg_netdev_fail;
+ }
+
+ return ret;
+
+out_reg_netdev_fail:
+out_init_ring_data:
+ (void)hns3_nic_uninit_vector_data(priv);
+ priv->ring_data = NULL;
+out_init_vector_data:
+out_get_ring_cfg:
+ priv->ae_handle = NULL;
+ free_netdev(netdev);
+ return ret;
+}
+
+static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
+{
+ struct net_device *netdev = handle->kinfo.netdev;
+ struct hns3_nic_priv *priv = netdev_priv(netdev);
+ int ret;
+
+ if (netdev->reg_state != NETREG_UNINITIALIZED)
+ unregister_netdev(netdev);
+
+ ret = hns3_nic_uninit_vector_data(priv);
+ if (ret)
+ netdev_err(netdev, "uninit vector error\n");
+
+ ret = hns3_uninit_all_ring(priv);
+ if (ret)
+ netdev_err(netdev, "uninit ring error\n");
+
+ priv->ring_data = NULL;
+
+ free_netdev(netdev);
+}
+
+static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
+{
+ struct net_device *netdev = handle->kinfo.netdev;
+
+ if (!netdev)
+ return;
+
+ if (linkup) {
+ netif_carrier_on(netdev);
+ netif_tx_wake_all_queues(netdev);
+ netdev_info(netdev, "link up\n");
+ } else {
+ netif_carrier_off(netdev);
+ netif_tx_stop_all_queues(netdev);
+ netdev_info(netdev, "link down\n");
+ }
+}
+
+const struct hnae3_client_ops client_ops = {
+ .init_instance = hns3_client_init,
+ .uninit_instance = hns3_client_uninit,
+ .link_status_change = hns3_link_status_change,
+};
+
+/* hns3_init_module - Driver registration routine
+ * hns3_init_module is the first routine called when the driver is
+ * loaded. All it does is register with the PCI subsystem.
+ */
+static int __init hns3_init_module(void)
+{
+ int ret;
+
+ pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
+ pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
+
+ client.type = HNAE3_CLIENT_KNIC;
+ snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
+ hns3_driver_name);
+
+ client.ops = &client_ops;
+
+ ret = hnae3_register_client(&client);
+ if (ret)
+ return ret;
+
+ ret = pci_register_driver(&hns3_driver);
+ if (ret)
+ hnae3_unregister_client(&client);
+
+ return ret;
+}
+module_init(hns3_init_module);
+
+/* hns3_exit_module - Driver exit cleanup routine
+ * hns3_exit_module is called just before the driver is removed
+ * from memory.
+ */
+static void __exit hns3_exit_module(void)
+{
+ pci_unregister_driver(&hns3_driver);
+ hnae3_unregister_client(&client);
+}
+module_exit(hns3_exit_module);
+
+MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
+MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("pci:hns-nic");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff