drivers/net/ethernet/hisilicon/hns3/hns3_enet.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 // Copyright (c) 2016-2017 Hisilicon Limited.
   3
   4 #include <linux/dma-mapping.h>
   5 #include <linux/etherdevice.h>
   6 #include <linux/interrupt.h>
   7 #ifdef CONFIG_RFS_ACCEL
   8 #include <linux/cpu_rmap.h>
   9 #endif
  10 #include <linux/if_vlan.h>
  11 #include <linux/ip.h>
  12 #include <linux/ipv6.h>
  13 #include <linux/module.h>
  14 #include <linux/pci.h>
  15 #include <linux/aer.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/sctp.h>
  18 #include <linux/vermagic.h>
  19 #include <net/gre.h>
  20 #include <net/ip6_checksum.h>
  21 #include <net/pkt_cls.h>
  22 #include <net/tcp.h>
  23 #include <net/vxlan.h>
  24
  25 #include "hnae3.h"
  26 #include "hns3_enet.h"
  27
  28 #define hns3_set_field(origin, shift, val)      ((origin) |= ((val) << (shift)))
  29 #define hns3_tx_bd_count(S)     DIV_ROUND_UP(S, HNS3_MAX_BD_SIZE)
  30
  31 #define hns3_rl_err(fmt, ...)                                           \
  32         do {                                                            \
  33                 if (net_ratelimit())                                    \
  34                         netdev_err(fmt, ##__VA_ARGS__);                 \
  35         } while (0)
  36
  37 static void hns3_clear_all_ring(struct hnae3_handle *h, bool force);
  38 static void hns3_remove_hw_addr(struct net_device *netdev);
  39
  40 static const char hns3_driver_name[] = "hns3";
  41 const char hns3_driver_version[] = VERMAGIC_STRING;
  42 static const char hns3_driver_string[] =
  43                         "Hisilicon Ethernet Network Driver for Hip08 Family";
  44 static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
  45 static struct hnae3_client client;
  46
  47 static int debug = -1;
  48 module_param(debug, int, 0);
  49 MODULE_PARM_DESC(debug, " Network interface message level setting");
  50
  51 #define DEFAULT_MSG_LEVEL (NETIF_MSG_PROBE | NETIF_MSG_LINK | \
  52                            NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
  53
  54 #define HNS3_INNER_VLAN_TAG     1
  55 #define HNS3_OUTER_VLAN_TAG     2
  56
  57 /* hns3_pci_tbl - PCI Device ID Table
  58  *
  59  * Last entry must be all 0s
  60  *
  61  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  62  *   Class, Class Mask, private data (not used) }
  63  */
  64 static const struct pci_device_id hns3_pci_tbl[] = {
  65         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
  66         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
  67         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA),
  68          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  69         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC),
  70          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  71         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA),
  72          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  73         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC),
  74          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  75         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC),
  76          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  77         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_VF), 0},
  78         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF),
  79          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  80         /* required last entry */
  81         {0, }
  82 };
  83 MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);
  84
  85 static irqreturn_t hns3_irq_handle(int irq, void *vector)
  86 {
  87         struct hns3_enet_tqp_vector *tqp_vector = vector;
  88
  89         napi_schedule_irqoff(&tqp_vector->napi);
  90
  91         return IRQ_HANDLED;
  92 }
  93
  94 static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
  95 {
  96         struct hns3_enet_tqp_vector *tqp_vectors;
  97         unsigned int i;
  98
  99         for (i = 0; i < priv->vector_num; i++) {
 100                 tqp_vectors = &priv->tqp_vector[i];
 101
 102                 if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
 103                         continue;
 104
 105                 /* clear the affinity mask */
 106                 irq_set_affinity_hint(tqp_vectors->vector_irq, NULL);
 107
 108                 /* release the irq resource */
 109                 free_irq(tqp_vectors->vector_irq, tqp_vectors);
 110                 tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
 111         }
 112 }
 113
 114 static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 115 {
 116         struct hns3_enet_tqp_vector *tqp_vectors;
 117         int txrx_int_idx = 0;
 118         int rx_int_idx = 0;
 119         int tx_int_idx = 0;
 120         unsigned int i;
 121         int ret;
 122
 123         for (i = 0; i < priv->vector_num; i++) {
 124                 tqp_vectors = &priv->tqp_vector[i];
 125
 126                 if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
 127                         continue;
 128
 129                 if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
 130                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 131                                  "%s-%s-%d", priv->netdev->name, "TxRx",
 132                                  txrx_int_idx++);
 133                         txrx_int_idx++;
 134                 } else if (tqp_vectors->rx_group.ring) {
 135                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 136                                  "%s-%s-%d", priv->netdev->name, "Rx",
 137                                  rx_int_idx++);
 138                 } else if (tqp_vectors->tx_group.ring) {
 139                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 140                                  "%s-%s-%d", priv->netdev->name, "Tx",
 141                                  tx_int_idx++);
 142                 } else {
 143                         /* Skip this unused q_vector */
 144                         continue;
 145                 }
 146
 147                 tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
 148
 149                 ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
 150                                   tqp_vectors->name, tqp_vectors);
 151                 if (ret) {
 152                         netdev_err(priv->netdev, "request irq(%d) fail\n",
 153                                    tqp_vectors->vector_irq);
 154                         hns3_nic_uninit_irq(priv);
 155                         return ret;
 156                 }
 157
 158                 irq_set_affinity_hint(tqp_vectors->vector_irq,
 159                                       &tqp_vectors->affinity_mask);
 160
 161                 tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
 162         }
 163
 164         return 0;
 165 }
 166
 167 static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
 168                                  u32 mask_en)
 169 {
 170         writel(mask_en, tqp_vector->mask_addr);
 171 }
 172
 173 static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
 174 {
 175         napi_enable(&tqp_vector->napi);
 176
 177         /* enable vector */
 178         hns3_mask_vector_irq(tqp_vector, 1);
 179 }
 180
 181 static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
 182 {
 183         /* disable vector */
 184         hns3_mask_vector_irq(tqp_vector, 0);
 185
 186         disable_irq(tqp_vector->vector_irq);
 187         napi_disable(&tqp_vector->napi);
 188 }
 189
 190 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 191                                  u32 rl_value)
 192 {
 193         u32 rl_reg = hns3_rl_usec_to_reg(rl_value);
 194
 195         /* this defines the configuration for RL (Interrupt Rate Limiter).
 196          * Rl defines rate of interrupts i.e. number of interrupts-per-second
 197          * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
 198          */
 199
 200         if (rl_reg > 0 && !tqp_vector->tx_group.coal.gl_adapt_enable &&
 201             !tqp_vector->rx_group.coal.gl_adapt_enable)
 202                 /* According to the hardware, the range of rl_reg is
 203                  * 0-59 and the unit is 4.
 204                  */
 205                 rl_reg |=  HNS3_INT_RL_ENABLE_MASK;
 206
 207         writel(rl_reg, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
 208 }
 209
 210 void hns3_set_vector_coalesce_rx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 211                                     u32 gl_value)
 212 {
 213         u32 rx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 214
 215         writel(rx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
 216 }
 217
 218 void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 219                                     u32 gl_value)
 220 {
 221         u32 tx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 222
 223         writel(tx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
 224 }
 225
 226 static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
 227                                    struct hns3_nic_priv *priv)
 228 {
 229         /* initialize the configuration for interrupt coalescing.
 230          * 1. GL (Interrupt Gap Limiter)
 231          * 2. RL (Interrupt Rate Limiter)
 232          *
 233          * Default: enable interrupt coalescing self-adaptive and GL
 234          */
 235         tqp_vector->tx_group.coal.gl_adapt_enable = 1;
 236         tqp_vector->rx_group.coal.gl_adapt_enable = 1;
 237
 238         tqp_vector->tx_group.coal.int_gl = HNS3_INT_GL_50K;
 239         tqp_vector->rx_group.coal.int_gl = HNS3_INT_GL_50K;
 240
 241         tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
 242         tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
 243 }
 244
 245 static void hns3_vector_gl_rl_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
 246                                       struct hns3_nic_priv *priv)
 247 {
 248         struct hnae3_handle *h = priv->ae_handle;
 249
 250         hns3_set_vector_coalesce_tx_gl(tqp_vector,
 251                                        tqp_vector->tx_group.coal.int_gl);
 252         hns3_set_vector_coalesce_rx_gl(tqp_vector,
 253                                        tqp_vector->rx_group.coal.int_gl);
 254         hns3_set_vector_coalesce_rl(tqp_vector, h->kinfo.int_rl_setting);
 255 }
 256
 257 static int hns3_nic_set_real_num_queue(struct net_device *netdev)
 258 {
 259         struct hnae3_handle *h = hns3_get_handle(netdev);
 260         struct hnae3_knic_private_info *kinfo = &h->kinfo;
 261         unsigned int queue_size = kinfo->rss_size * kinfo->num_tc;
 262         int i, ret;
 263
 264         if (kinfo->num_tc <= 1) {
 265                 netdev_reset_tc(netdev);
 266         } else {
 267                 ret = netdev_set_num_tc(netdev, kinfo->num_tc);
 268                 if (ret) {
 269                         netdev_err(netdev,
 270                                    "netdev_set_num_tc fail, ret=%d!\n", ret);
 271                         return ret;
 272                 }
 273
 274                 for (i = 0; i < HNAE3_MAX_TC; i++) {
 275                         if (!kinfo->tc_info[i].enable)
 276                                 continue;
 277
 278                         netdev_set_tc_queue(netdev,
 279                                             kinfo->tc_info[i].tc,
 280                                             kinfo->tc_info[i].tqp_count,
 281                                             kinfo->tc_info[i].tqp_offset);
 282                 }
 283         }
 284
 285         ret = netif_set_real_num_tx_queues(netdev, queue_size);
 286         if (ret) {
 287                 netdev_err(netdev,
 288                            "netif_set_real_num_tx_queues fail, ret=%d!\n", ret);
 289                 return ret;
 290         }
 291
 292         ret = netif_set_real_num_rx_queues(netdev, queue_size);
 293         if (ret) {
 294                 netdev_err(netdev,
 295                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
 296                 return ret;
 297         }
 298
 299         return 0;
 300 }
 301
 302 static u16 hns3_get_max_available_channels(struct hnae3_handle *h)
 303 {
 304         u16 alloc_tqps, max_rss_size, rss_size;
 305
 306         h->ae_algo->ops->get_tqps_and_rss_info(h, &alloc_tqps, &max_rss_size);
 307         rss_size = alloc_tqps / h->kinfo.num_tc;
 308
 309         return min_t(u16, rss_size, max_rss_size);
 310 }
 311
 312 static void hns3_tqp_enable(struct hnae3_queue *tqp)
 313 {
 314         u32 rcb_reg;
 315
 316         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 317         rcb_reg |= BIT(HNS3_RING_EN_B);
 318         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 319 }
 320
 321 static void hns3_tqp_disable(struct hnae3_queue *tqp)
 322 {
 323         u32 rcb_reg;
 324
 325         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 326         rcb_reg &= ~BIT(HNS3_RING_EN_B);
 327         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 328 }
 329
 330 static void hns3_free_rx_cpu_rmap(struct net_device *netdev)
 331 {
 332 #ifdef CONFIG_RFS_ACCEL
 333         free_irq_cpu_rmap(netdev->rx_cpu_rmap);
 334         netdev->rx_cpu_rmap = NULL;
 335 #endif
 336 }
 337
 338 static int hns3_set_rx_cpu_rmap(struct net_device *netdev)
 339 {
 340 #ifdef CONFIG_RFS_ACCEL
 341         struct hns3_nic_priv *priv = netdev_priv(netdev);
 342         struct hns3_enet_tqp_vector *tqp_vector;
 343         int i, ret;
 344
 345         if (!netdev->rx_cpu_rmap) {
 346                 netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->vector_num);
 347                 if (!netdev->rx_cpu_rmap)
 348                         return -ENOMEM;
 349         }
 350
 351         for (i = 0; i < priv->vector_num; i++) {
 352                 tqp_vector = &priv->tqp_vector[i];
 353                 ret = irq_cpu_rmap_add(netdev->rx_cpu_rmap,
 354                                        tqp_vector->vector_irq);
 355                 if (ret) {
 356                         hns3_free_rx_cpu_rmap(netdev);
 357                         return ret;
 358                 }
 359         }
 360 #endif
 361         return 0;
 362 }
 363
 364 static int hns3_nic_net_up(struct net_device *netdev)
 365 {
 366         struct hns3_nic_priv *priv = netdev_priv(netdev);
 367         struct hnae3_handle *h = priv->ae_handle;
 368         int i, j;
 369         int ret;
 370
 371         ret = hns3_nic_reset_all_ring(h);
 372         if (ret)
 373                 return ret;
 374
 375         /* the device can work without cpu rmap, only aRFS needs it */
 376         ret = hns3_set_rx_cpu_rmap(netdev);
 377         if (ret)
 378                 netdev_warn(netdev, "set rx cpu rmap fail, ret=%d!\n", ret);
 379
 380         /* get irq resource for all vectors */
 381         ret = hns3_nic_init_irq(priv);
 382         if (ret) {
 383                 netdev_err(netdev, "init irq failed! ret=%d\n", ret);
 384                 goto free_rmap;
 385         }
 386
 387         clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 388
 389         /* enable the vectors */
 390         for (i = 0; i < priv->vector_num; i++)
 391                 hns3_vector_enable(&priv->tqp_vector[i]);
 392
 393         /* enable rcb */
 394         for (j = 0; j < h->kinfo.num_tqps; j++)
 395                 hns3_tqp_enable(h->kinfo.tqp[j]);
 396
 397         /* start the ae_dev */
 398         ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
 399         if (ret)
 400                 goto out_start_err;
 401
 402         return 0;
 403
 404 out_start_err:
 405         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 406         while (j--)
 407                 hns3_tqp_disable(h->kinfo.tqp[j]);
 408
 409         for (j = i - 1; j >= 0; j--)
 410                 hns3_vector_disable(&priv->tqp_vector[j]);
 411
 412         hns3_nic_uninit_irq(priv);
 413 free_rmap:
 414         hns3_free_rx_cpu_rmap(netdev);
 415         return ret;
 416 }
 417
 418 static void hns3_config_xps(struct hns3_nic_priv *priv)
 419 {
 420         int i;
 421
 422         for (i = 0; i < priv->vector_num; i++) {
 423                 struct hns3_enet_tqp_vector *tqp_vector = &priv->tqp_vector[i];
 424                 struct hns3_enet_ring *ring = tqp_vector->tx_group.ring;
 425
 426                 while (ring) {
 427                         int ret;
 428
 429                         ret = netif_set_xps_queue(priv->netdev,
 430                                                   &tqp_vector->affinity_mask,
 431                                                   ring->tqp->tqp_index);
 432                         if (ret)
 433                                 netdev_warn(priv->netdev,
 434                                             "set xps queue failed: %d", ret);
 435
 436                         ring = ring->next;
 437                 }
 438         }
 439 }
 440
 441 static int hns3_nic_net_open(struct net_device *netdev)
 442 {
 443         struct hns3_nic_priv *priv = netdev_priv(netdev);
 444         struct hnae3_handle *h = hns3_get_handle(netdev);
 445         struct hnae3_knic_private_info *kinfo;
 446         int i, ret;
 447
 448         if (hns3_nic_resetting(netdev))
 449                 return -EBUSY;
 450
 451         netif_carrier_off(netdev);
 452
 453         ret = hns3_nic_set_real_num_queue(netdev);
 454         if (ret)
 455                 return ret;
 456
 457         ret = hns3_nic_net_up(netdev);
 458         if (ret) {
 459                 netdev_err(netdev, "net up fail, ret=%d!\n", ret);
 460                 return ret;
 461         }
 462
 463         kinfo = &h->kinfo;
 464         for (i = 0; i < HNAE3_MAX_USER_PRIO; i++)
 465                 netdev_set_prio_tc_map(netdev, i, kinfo->prio_tc[i]);
 466
 467         if (h->ae_algo->ops->set_timer_task)
 468                 h->ae_algo->ops->set_timer_task(priv->ae_handle, true);
 469
 470         hns3_config_xps(priv);
 471
 472         netif_dbg(h, drv, netdev, "net open\n");
 473
 474         return 0;
 475 }
 476
 477 static void hns3_reset_tx_queue(struct hnae3_handle *h)
 478 {
 479         struct net_device *ndev = h->kinfo.netdev;
 480         struct hns3_nic_priv *priv = netdev_priv(ndev);
 481         struct netdev_queue *dev_queue;
 482         u32 i;
 483
 484         for (i = 0; i < h->kinfo.num_tqps; i++) {
 485                 dev_queue = netdev_get_tx_queue(ndev,
 486                                                 priv->ring_data[i].queue_index);
 487                 netdev_tx_reset_queue(dev_queue);
 488         }
 489 }
 490
 491 static void hns3_nic_net_down(struct net_device *netdev)
 492 {
 493         struct hns3_nic_priv *priv = netdev_priv(netdev);
 494         struct hnae3_handle *h = hns3_get_handle(netdev);
 495         const struct hnae3_ae_ops *ops;
 496         int i;
 497
 498         /* disable vectors */
 499         for (i = 0; i < priv->vector_num; i++)
 500                 hns3_vector_disable(&priv->tqp_vector[i]);
 501
 502         /* disable rcb */
 503         for (i = 0; i < h->kinfo.num_tqps; i++)
 504                 hns3_tqp_disable(h->kinfo.tqp[i]);
 505
 506         /* stop ae_dev */
 507         ops = priv->ae_handle->ae_algo->ops;
 508         if (ops->stop)
 509                 ops->stop(priv->ae_handle);
 510
 511         hns3_free_rx_cpu_rmap(netdev);
 512
 513         /* free irq resources */
 514         hns3_nic_uninit_irq(priv);
 515
 516         /* delay ring buffer clearing to hns3_reset_notify_uninit_enet
 517          * during reset process, because driver may not be able
 518          * to disable the ring through firmware when downing the netdev.
 519          */
 520         if (!hns3_nic_resetting(netdev))
 521                 hns3_clear_all_ring(priv->ae_handle, false);
 522
 523         hns3_reset_tx_queue(priv->ae_handle);
 524 }
 525
 526 static int hns3_nic_net_stop(struct net_device *netdev)
 527 {
 528         struct hns3_nic_priv *priv = netdev_priv(netdev);
 529         struct hnae3_handle *h = hns3_get_handle(netdev);
 530
 531         if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
 532                 return 0;
 533
 534         netif_dbg(h, drv, netdev, "net stop\n");
 535
 536         if (h->ae_algo->ops->set_timer_task)
 537                 h->ae_algo->ops->set_timer_task(priv->ae_handle, false);
 538
 539         netif_tx_stop_all_queues(netdev);
 540         netif_carrier_off(netdev);
 541
 542         hns3_nic_net_down(netdev);
 543
 544         return 0;
 545 }
 546
 547 static int hns3_nic_uc_sync(struct net_device *netdev,
 548                             const unsigned char *addr)
 549 {
 550         struct hnae3_handle *h = hns3_get_handle(netdev);
 551
 552         if (h->ae_algo->ops->add_uc_addr)
 553                 return h->ae_algo->ops->add_uc_addr(h, addr);
 554
 555         return 0;
 556 }
 557
 558 static int hns3_nic_uc_unsync(struct net_device *netdev,
 559                               const unsigned char *addr)
 560 {
 561         struct hnae3_handle *h = hns3_get_handle(netdev);
 562
 563         if (h->ae_algo->ops->rm_uc_addr)
 564                 return h->ae_algo->ops->rm_uc_addr(h, addr);
 565
 566         return 0;
 567 }
 568
 569 static int hns3_nic_mc_sync(struct net_device *netdev,
 570                             const unsigned char *addr)
 571 {
 572         struct hnae3_handle *h = hns3_get_handle(netdev);
 573
 574         if (h->ae_algo->ops->add_mc_addr)
 575                 return h->ae_algo->ops->add_mc_addr(h, addr);
 576
 577         return 0;
 578 }
 579
 580 static int hns3_nic_mc_unsync(struct net_device *netdev,
 581                               const unsigned char *addr)
 582 {
 583         struct hnae3_handle *h = hns3_get_handle(netdev);
 584
 585         if (h->ae_algo->ops->rm_mc_addr)
 586                 return h->ae_algo->ops->rm_mc_addr(h, addr);
 587
 588         return 0;
 589 }
 590
 591 static u8 hns3_get_netdev_flags(struct net_device *netdev)
 592 {
 593         u8 flags = 0;
 594
 595         if (netdev->flags & IFF_PROMISC) {
 596                 flags = HNAE3_USER_UPE | HNAE3_USER_MPE | HNAE3_BPE;
 597         } else {
 598                 flags |= HNAE3_VLAN_FLTR;
 599                 if (netdev->flags & IFF_ALLMULTI)
 600                         flags |= HNAE3_USER_MPE;
 601         }
 602
 603         return flags;
 604 }
 605
 606 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 607 {
 608         struct hnae3_handle *h = hns3_get_handle(netdev);
 609         u8 new_flags;
 610         int ret;
 611
 612         new_flags = hns3_get_netdev_flags(netdev);
 613
 614         ret = __dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync);
 615         if (ret) {
 616                 netdev_err(netdev, "sync uc address fail\n");
 617                 if (ret == -ENOSPC)
 618                         new_flags |= HNAE3_OVERFLOW_UPE;
 619         }
 620
 621         if (netdev->flags & IFF_MULTICAST) {
 622                 ret = __dev_mc_sync(netdev, hns3_nic_mc_sync,
 623                                     hns3_nic_mc_unsync);
 624                 if (ret) {
 625                         netdev_err(netdev, "sync mc address fail\n");
 626                         if (ret == -ENOSPC)
 627                                 new_flags |= HNAE3_OVERFLOW_MPE;
 628                 }
 629         }
 630
 631         /* User mode Promisc mode enable and vlan filtering is disabled to
 632          * let all packets in. MAC-VLAN Table overflow Promisc enabled and
 633          * vlan fitering is enabled
 634          */
 635         hns3_enable_vlan_filter(netdev, new_flags & HNAE3_VLAN_FLTR);
 636         h->netdev_flags = new_flags;
 637         hns3_update_promisc_mode(netdev, new_flags);
 638 }
 639
 640 int hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags)
 641 {
 642         struct hns3_nic_priv *priv = netdev_priv(netdev);
 643         struct hnae3_handle *h = priv->ae_handle;
 644
 645         if (h->ae_algo->ops->set_promisc_mode) {
 646                 return h->ae_algo->ops->set_promisc_mode(h,
 647                                                 promisc_flags & HNAE3_UPE,
 648                                                 promisc_flags & HNAE3_MPE);
 649         }
 650
 651         return 0;
 652 }
 653
 654 void hns3_enable_vlan_filter(struct net_device *netdev, bool enable)
 655 {
 656         struct hns3_nic_priv *priv = netdev_priv(netdev);
 657         struct hnae3_handle *h = priv->ae_handle;
 658         bool last_state;
 659
 660         if (h->pdev->revision >= 0x21 && h->ae_algo->ops->enable_vlan_filter) {
 661                 last_state = h->netdev_flags & HNAE3_VLAN_FLTR ? true : false;
 662                 if (enable != last_state) {
 663                         netdev_info(netdev,
 664                                     "%s vlan filter\n",
 665                                     enable ? "enable" : "disable");
 666                         h->ae_algo->ops->enable_vlan_filter(h, enable);
 667                 }
 668         }
 669 }
 670
 671 static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
 672                         u16 *mss, u32 *type_cs_vlan_tso)
 673 {
 674         u32 l4_offset, hdr_len;
 675         union l3_hdr_info l3;
 676         union l4_hdr_info l4;
 677         u32 l4_paylen;
 678         int ret;
 679
 680         if (!skb_is_gso(skb))
 681                 return 0;
 682
 683         ret = skb_cow_head(skb, 0);
 684         if (unlikely(ret < 0))
 685                 return ret;
 686
 687         l3.hdr = skb_network_header(skb);
 688         l4.hdr = skb_transport_header(skb);
 689
 690         /* Software should clear the IPv4's checksum field when tso is
 691          * needed.
 692          */
 693         if (l3.v4->version == 4)
 694                 l3.v4->check = 0;
 695
 696         /* tunnel packet */
 697         if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 698                                          SKB_GSO_GRE_CSUM |
 699                                          SKB_GSO_UDP_TUNNEL |
 700                                          SKB_GSO_UDP_TUNNEL_CSUM)) {
 701                 if ((!(skb_shinfo(skb)->gso_type &
 702                     SKB_GSO_PARTIAL)) &&
 703                     (skb_shinfo(skb)->gso_type &
 704                     SKB_GSO_UDP_TUNNEL_CSUM)) {
 705                         /* Software should clear the udp's checksum
 706                          * field when tso is needed.
 707                          */
 708                         l4.udp->check = 0;
 709                 }
 710                 /* reset l3&l4 pointers from outer to inner headers */
 711                 l3.hdr = skb_inner_network_header(skb);
 712                 l4.hdr = skb_inner_transport_header(skb);
 713
 714                 /* Software should clear the IPv4's checksum field when
 715                  * tso is needed.
 716                  */
 717                 if (l3.v4->version == 4)
 718                         l3.v4->check = 0;
 719         }
 720
 721         /* normal or tunnel packet */
 722         l4_offset = l4.hdr - skb->data;
 723         hdr_len = (l4.tcp->doff << 2) + l4_offset;
 724
 725         /* remove payload length from inner pseudo checksum when tso */
 726         l4_paylen = skb->len - l4_offset;
 727         csum_replace_by_diff(&l4.tcp->check,
 728                              (__force __wsum)htonl(l4_paylen));
 729
 730         /* find the txbd field values */
 731         *paylen = skb->len - hdr_len;
 732         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_TSO_B, 1);
 733
 734         /* get MSS for TSO */
 735         *mss = skb_shinfo(skb)->gso_size;
 736
 737         return 0;
 738 }
 739
 740 static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 741                                 u8 *il4_proto)
 742 {
 743         union l3_hdr_info l3;
 744         unsigned char *l4_hdr;
 745         unsigned char *exthdr;
 746         u8 l4_proto_tmp;
 747         __be16 frag_off;
 748
 749         /* find outer header point */
 750         l3.hdr = skb_network_header(skb);
 751         l4_hdr = skb_transport_header(skb);
 752
 753         if (skb->protocol == htons(ETH_P_IPV6)) {
 754                 exthdr = l3.hdr + sizeof(*l3.v6);
 755                 l4_proto_tmp = l3.v6->nexthdr;
 756                 if (l4_hdr != exthdr)
 757                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 758                                          &l4_proto_tmp, &frag_off);
 759         } else if (skb->protocol == htons(ETH_P_IP)) {
 760                 l4_proto_tmp = l3.v4->protocol;
 761         } else {
 762                 return -EINVAL;
 763         }
 764
 765         *ol4_proto = l4_proto_tmp;
 766
 767         /* tunnel packet */
 768         if (!skb->encapsulation) {
 769                 *il4_proto = 0;
 770                 return 0;
 771         }
 772
 773         /* find inner header point */
 774         l3.hdr = skb_inner_network_header(skb);
 775         l4_hdr = skb_inner_transport_header(skb);
 776
 777         if (l3.v6->version == 6) {
 778                 exthdr = l3.hdr + sizeof(*l3.v6);
 779                 l4_proto_tmp = l3.v6->nexthdr;
 780                 if (l4_hdr != exthdr)
 781                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 782                                          &l4_proto_tmp, &frag_off);
 783         } else if (l3.v4->version == 4) {
 784                 l4_proto_tmp = l3.v4->protocol;
 785         }
 786
 787         *il4_proto = l4_proto_tmp;
 788
 789         return 0;
 790 }
 791
 792 /* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
 793  * and it is udp packet, which has a dest port as the IANA assigned.
 794  * the hardware is expected to do the checksum offload, but the
 795  * hardware will not do the checksum offload when udp dest port is
 796  * 4789.
 797  */
 798 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 799 {
 800         union l4_hdr_info l4;
 801
 802         l4.hdr = skb_transport_header(skb);
 803
 804         if (!(!skb->encapsulation &&
 805               l4.udp->dest == htons(IANA_VXLAN_UDP_PORT)))
 806                 return false;
 807
 808         skb_checksum_help(skb);
 809
 810         return true;
 811 }
 812
 813 static void hns3_set_outer_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
 814                                   u32 *ol_type_vlan_len_msec)
 815 {
 816         u32 l2_len, l3_len, l4_len;
 817         unsigned char *il2_hdr;
 818         union l3_hdr_info l3;
 819         union l4_hdr_info l4;
 820
 821         l3.hdr = skb_network_header(skb);
 822         l4.hdr = skb_transport_header(skb);
 823
 824         /* compute OL2 header size, defined in 2 Bytes */
 825         l2_len = l3.hdr - skb->data;
 826         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L2LEN_S, l2_len >> 1);
 827
 828         /* compute OL3 header size, defined in 4 Bytes */
 829         l3_len = l4.hdr - l3.hdr;
 830         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_S, l3_len >> 2);
 831
 832         il2_hdr = skb_inner_mac_header(skb);
 833         /* compute OL4 header size, defined in 4 Bytes */
 834         l4_len = il2_hdr - l4.hdr;
 835         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_S, l4_len >> 2);
 836
 837         /* define outer network header type */
 838         if (skb->protocol == htons(ETH_P_IP)) {
 839                 if (skb_is_gso(skb))
 840                         hns3_set_field(*ol_type_vlan_len_msec,
 841                                        HNS3_TXD_OL3T_S,
 842                                        HNS3_OL3T_IPV4_CSUM);
 843                 else
 844                         hns3_set_field(*ol_type_vlan_len_msec,
 845                                        HNS3_TXD_OL3T_S,
 846                                        HNS3_OL3T_IPV4_NO_CSUM);
 847
 848         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 849                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_S,
 850                                HNS3_OL3T_IPV6);
 851         }
 852
 853         if (ol4_proto == IPPROTO_UDP)
 854                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
 855                                HNS3_TUN_MAC_IN_UDP);
 856         else if (ol4_proto == IPPROTO_GRE)
 857                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
 858                                HNS3_TUN_NVGRE);
 859 }
 860
 861 static int hns3_set_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
 862                            u8 il4_proto, u32 *type_cs_vlan_tso,
 863                            u32 *ol_type_vlan_len_msec)
 864 {
 865         unsigned char *l2_hdr = skb->data;
 866         u32 l4_proto = ol4_proto;
 867         union l4_hdr_info l4;
 868         union l3_hdr_info l3;
 869         u32 l2_len, l3_len;
 870
 871         l4.hdr = skb_transport_header(skb);
 872         l3.hdr = skb_network_header(skb);
 873
 874         /* handle encapsulation skb */
 875         if (skb->encapsulation) {
 876                 /* If this is a not UDP/GRE encapsulation skb */
 877                 if (!(ol4_proto == IPPROTO_UDP || ol4_proto == IPPROTO_GRE)) {
 878                         /* drop the skb tunnel packet if hardware don't support,
 879                          * because hardware can't calculate csum when TSO.
 880                          */
 881                         if (skb_is_gso(skb))
 882                                 return -EDOM;
 883
 884                         /* the stack computes the IP header already,
 885                          * driver calculate l4 checksum when not TSO.
 886                          */
 887                         skb_checksum_help(skb);
 888                         return 0;
 889                 }
 890
 891                 hns3_set_outer_l2l3l4(skb, ol4_proto, ol_type_vlan_len_msec);
 892
 893                 /* switch to inner header */
 894                 l2_hdr = skb_inner_mac_header(skb);
 895                 l3.hdr = skb_inner_network_header(skb);
 896                 l4.hdr = skb_inner_transport_header(skb);
 897                 l4_proto = il4_proto;
 898         }
 899
 900         if (l3.v4->version == 4) {
 901                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_S,
 902                                HNS3_L3T_IPV4);
 903
 904                 /* the stack computes the IP header already, the only time we
 905                  * need the hardware to recompute it is in the case of TSO.
 906                  */
 907                 if (skb_is_gso(skb))
 908                         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
 909         } else if (l3.v6->version == 6) {
 910                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_S,
 911                                HNS3_L3T_IPV6);
 912         }
 913
 914         /* compute inner(/normal) L2 header size, defined in 2 Bytes */
 915         l2_len = l3.hdr - l2_hdr;
 916         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_S, l2_len >> 1);
 917
 918         /* compute inner(/normal) L3 header size, defined in 4 Bytes */
 919         l3_len = l4.hdr - l3.hdr;
 920         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_S, l3_len >> 2);
 921
 922         /* compute inner(/normal) L4 header size, defined in 4 Bytes */
 923         switch (l4_proto) {
 924         case IPPROTO_TCP:
 925                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 926                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 927                                HNS3_L4T_TCP);
 928                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 929                                l4.tcp->doff);
 930                 break;
 931         case IPPROTO_UDP:
 932                 if (hns3_tunnel_csum_bug(skb))
 933                         break;
 934
 935                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 936                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 937                                HNS3_L4T_UDP);
 938                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 939                                (sizeof(struct udphdr) >> 2));
 940                 break;
 941         case IPPROTO_SCTP:
 942                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 943                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 944                                HNS3_L4T_SCTP);
 945                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 946                                (sizeof(struct sctphdr) >> 2));
 947                 break;
 948         default:
 949                 /* drop the skb tunnel packet if hardware don't support,
 950                  * because hardware can't calculate csum when TSO.
 951                  */
 952                 if (skb_is_gso(skb))
 953                         return -EDOM;
 954
 955                 /* the stack computes the IP header already,
 956                  * driver calculate l4 checksum when not TSO.
 957                  */
 958                 skb_checksum_help(skb);
 959                 return 0;
 960         }
 961
 962         return 0;
 963 }
 964
 965 static int hns3_handle_vtags(struct hns3_enet_ring *tx_ring,
 966                              struct sk_buff *skb)
 967 {
 968         struct hnae3_handle *handle = tx_ring->tqp->handle;
 969         struct vlan_ethhdr *vhdr;
 970         int rc;
 971
 972         if (!(skb->protocol == htons(ETH_P_8021Q) ||
 973               skb_vlan_tag_present(skb)))
 974                 return 0;
 975
 976         /* Since HW limitation, if port based insert VLAN enabled, only one VLAN
 977          * header is allowed in skb, otherwise it will cause RAS error.
 978          */
 979         if (unlikely(skb_vlan_tagged_multi(skb) &&
 980                      handle->port_base_vlan_state ==
 981                      HNAE3_PORT_BASE_VLAN_ENABLE))
 982                 return -EINVAL;
 983
 984         if (skb->protocol == htons(ETH_P_8021Q) &&
 985             !(handle->kinfo.netdev->features & NETIF_F_HW_VLAN_CTAG_TX)) {
 986                 /* When HW VLAN acceleration is turned off, and the stack
 987                  * sets the protocol to 802.1q, the driver just need to
 988                  * set the protocol to the encapsulated ethertype.
 989                  */
 990                 skb->protocol = vlan_get_protocol(skb);
 991                 return 0;
 992         }
 993
 994         if (skb_vlan_tag_present(skb)) {
 995                 /* Based on hw strategy, use out_vtag in two layer tag case,
 996                  * and use inner_vtag in one tag case.
 997                  */
 998                 if (skb->protocol == htons(ETH_P_8021Q) &&
 999                     handle->port_base_vlan_state ==
1000                     HNAE3_PORT_BASE_VLAN_DISABLE)
1001                         rc = HNS3_OUTER_VLAN_TAG;
1002                 else
1003                         rc = HNS3_INNER_VLAN_TAG;
1004
1005                 skb->protocol = vlan_get_protocol(skb);
1006                 return rc;
1007         }
1008
1009         rc = skb_cow_head(skb, 0);
1010         if (unlikely(rc < 0))
1011                 return rc;
1012
1013         vhdr = (struct vlan_ethhdr *)skb->data;
1014         vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority << VLAN_PRIO_SHIFT)
1015                                          & VLAN_PRIO_MASK);
1016
1017         skb->protocol = vlan_get_protocol(skb);
1018         return 0;
1019 }
1020
1021 static int hns3_fill_skb_desc(struct hns3_enet_ring *ring,
1022                               struct sk_buff *skb, struct hns3_desc *desc)
1023 {
1024         u32 ol_type_vlan_len_msec = 0;
1025         u32 type_cs_vlan_tso = 0;
1026         u32 paylen = skb->len;
1027         u16 inner_vtag = 0;
1028         u16 out_vtag = 0;
1029         u16 mss = 0;
1030         int ret;
1031
1032         ret = hns3_handle_vtags(ring, skb);
1033         if (unlikely(ret < 0)) {
1034                 u64_stats_update_begin(&ring->syncp);
1035                 ring->stats.tx_vlan_err++;
1036                 u64_stats_update_end(&ring->syncp);
1037                 return ret;
1038         } else if (ret == HNS3_INNER_VLAN_TAG) {
1039                 inner_vtag = skb_vlan_tag_get(skb);
1040                 inner_vtag |= (skb->priority << VLAN_PRIO_SHIFT) &
1041                                 VLAN_PRIO_MASK;
1042                 hns3_set_field(type_cs_vlan_tso, HNS3_TXD_VLAN_B, 1);
1043         } else if (ret == HNS3_OUTER_VLAN_TAG) {
1044                 out_vtag = skb_vlan_tag_get(skb);
1045                 out_vtag |= (skb->priority << VLAN_PRIO_SHIFT) &
1046                                 VLAN_PRIO_MASK;
1047                 hns3_set_field(ol_type_vlan_len_msec, HNS3_TXD_OVLAN_B,
1048                                1);
1049         }
1050
1051         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1052                 u8 ol4_proto, il4_proto;
1053
1054                 skb_reset_mac_len(skb);
1055
1056                 ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
1057                 if (unlikely(ret < 0)) {
1058                         u64_stats_update_begin(&ring->syncp);
1059                         ring->stats.tx_l4_proto_err++;
1060                         u64_stats_update_end(&ring->syncp);
1061                         return ret;
1062                 }
1063
1064                 ret = hns3_set_l2l3l4(skb, ol4_proto, il4_proto,
1065                                       &type_cs_vlan_tso,
1066                                       &ol_type_vlan_len_msec);
1067                 if (unlikely(ret < 0)) {
1068                         u64_stats_update_begin(&ring->syncp);
1069                         ring->stats.tx_l2l3l4_err++;
1070                         u64_stats_update_end(&ring->syncp);
1071                         return ret;
1072                 }
1073
1074                 ret = hns3_set_tso(skb, &paylen, &mss,
1075                                    &type_cs_vlan_tso);
1076                 if (unlikely(ret < 0)) {
1077                         u64_stats_update_begin(&ring->syncp);
1078                         ring->stats.tx_tso_err++;
1079                         u64_stats_update_end(&ring->syncp);
1080                         return ret;
1081                 }
1082         }
1083
1084         /* Set txbd */
1085         desc->tx.ol_type_vlan_len_msec =
1086                 cpu_to_le32(ol_type_vlan_len_msec);
1087         desc->tx.type_cs_vlan_tso_len = cpu_to_le32(type_cs_vlan_tso);
1088         desc->tx.paylen = cpu_to_le32(paylen);
1089         desc->tx.mss = cpu_to_le16(mss);
1090         desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
1091         desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
1092
1093         return 0;
1094 }
1095
1096 static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
1097                           unsigned int size, enum hns_desc_type type)
1098 {
1099 #define HNS3_LIKELY_BD_NUM      1
1100
1101         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
1102         struct hns3_desc *desc = &ring->desc[ring->next_to_use];
1103         struct device *dev = ring_to_dev(ring);
1104         skb_frag_t *frag;
1105         unsigned int frag_buf_num;
1106         int k, sizeoflast;
1107         dma_addr_t dma;
1108
1109         if (type == DESC_TYPE_SKB) {
1110                 struct sk_buff *skb = (struct sk_buff *)priv;
1111                 int ret;
1112
1113                 ret = hns3_fill_skb_desc(ring, skb, desc);
1114                 if (unlikely(ret < 0))
1115                         return ret;
1116
1117                 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1118         } else {
1119                 frag = (skb_frag_t *)priv;
1120                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1121         }
1122
1123         if (unlikely(dma_mapping_error(dev, dma))) {
1124                 u64_stats_update_begin(&ring->syncp);
1125                 ring->stats.sw_err_cnt++;
1126                 u64_stats_update_end(&ring->syncp);
1127                 return -ENOMEM;
1128         }
1129
1130         desc_cb->length = size;
1131
1132         if (likely(size <= HNS3_MAX_BD_SIZE)) {
1133                 desc_cb->priv = priv;
1134                 desc_cb->dma = dma;
1135                 desc_cb->type = type;
1136                 desc->addr = cpu_to_le64(dma);
1137                 desc->tx.send_size = cpu_to_le16(size);
1138                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1139                         cpu_to_le16(BIT(HNS3_TXD_VLD_B));
1140
1141                 ring_ptr_move_fw(ring, next_to_use);
1142                 return HNS3_LIKELY_BD_NUM;
1143         }
1144
1145         frag_buf_num = hns3_tx_bd_count(size);
1146         sizeoflast = size & HNS3_TX_LAST_SIZE_M;
1147         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1148
1149         /* When frag size is bigger than hardware limit, split this frag */
1150         for (k = 0; k < frag_buf_num; k++) {
1151                 /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
1152                 desc_cb->priv = priv;
1153                 desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k;
1154                 desc_cb->type = (type == DESC_TYPE_SKB && !k) ?
1155                                 DESC_TYPE_SKB : DESC_TYPE_PAGE;
1156
1157                 /* now, fill the descriptor */
1158                 desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
1159                 desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
1160                                      (u16)sizeoflast : (u16)HNS3_MAX_BD_SIZE);
1161                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1162                                 cpu_to_le16(BIT(HNS3_TXD_VLD_B));
1163
1164                 /* move ring pointer to next */
1165                 ring_ptr_move_fw(ring, next_to_use);
1166
1167                 desc_cb = &ring->desc_cb[ring->next_to_use];
1168                 desc = &ring->desc[ring->next_to_use];
1169         }
1170
1171         return frag_buf_num;
1172 }
1173
1174 static unsigned int hns3_skb_bd_num(struct sk_buff *skb, unsigned int *bd_size,
1175                                     unsigned int bd_num)
1176 {
1177         unsigned int size;
1178         int i;
1179
1180         size = skb_headlen(skb);
1181         while (size > HNS3_MAX_BD_SIZE) {
1182                 bd_size[bd_num++] = HNS3_MAX_BD_SIZE;
1183                 size -= HNS3_MAX_BD_SIZE;
1184
1185                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1186                         return bd_num;
1187         }
1188
1189         if (size) {
1190                 bd_size[bd_num++] = size;
1191                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1192                         return bd_num;
1193         }
1194
1195         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1196                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1197                 size = skb_frag_size(frag);
1198                 if (!size)
1199                         continue;
1200
1201                 while (size > HNS3_MAX_BD_SIZE) {
1202                         bd_size[bd_num++] = HNS3_MAX_BD_SIZE;
1203                         size -= HNS3_MAX_BD_SIZE;
1204
1205                         if (bd_num > HNS3_MAX_TSO_BD_NUM)
1206                                 return bd_num;
1207                 }
1208
1209                 bd_size[bd_num++] = size;
1210                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1211                         return bd_num;
1212         }
1213
1214         return bd_num;
1215 }
1216
1217 static unsigned int hns3_tx_bd_num(struct sk_buff *skb, unsigned int *bd_size)
1218 {
1219         struct sk_buff *frag_skb;
1220         unsigned int bd_num = 0;
1221
1222         /* If the total len is within the max bd limit */
1223         if (likely(skb->len <= HNS3_MAX_BD_SIZE && !skb_has_frag_list(skb) &&
1224                    skb_shinfo(skb)->nr_frags < HNS3_MAX_NON_TSO_BD_NUM))
1225                 return skb_shinfo(skb)->nr_frags + 1U;
1226
1227         /* The below case will always be linearized, return
1228          * HNS3_MAX_BD_NUM_TSO + 1U to make sure it is linearized.
1229          */
1230         if (unlikely(skb->len > HNS3_MAX_TSO_SIZE ||
1231                      (!skb_is_gso(skb) && skb->len > HNS3_MAX_NON_TSO_SIZE)))
1232                 return HNS3_MAX_TSO_BD_NUM + 1U;
1233
1234         bd_num = hns3_skb_bd_num(skb, bd_size, bd_num);
1235
1236         if (!skb_has_frag_list(skb) || bd_num > HNS3_MAX_TSO_BD_NUM)
1237                 return bd_num;
1238
1239         skb_walk_frags(skb, frag_skb) {
1240                 bd_num = hns3_skb_bd_num(frag_skb, bd_size, bd_num);
1241                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1242                         return bd_num;
1243         }
1244
1245         return bd_num;
1246 }
1247
1248 static unsigned int hns3_gso_hdr_len(struct sk_buff *skb)
1249 {
1250         if (!skb->encapsulation)
1251                 return skb_transport_offset(skb) + tcp_hdrlen(skb);
1252
1253         return skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
1254 }
1255
1256 /* HW need every continuous 8 buffer data to be larger than MSS,
1257  * we simplify it by ensuring skb_headlen + the first continuous
1258  * 7 frags to to be larger than gso header len + mss, and the remaining
1259  * continuous 7 frags to be larger than MSS except the last 7 frags.
1260  */
1261 static bool hns3_skb_need_linearized(struct sk_buff *skb, unsigned int *bd_size,
1262                                      unsigned int bd_num)
1263 {
1264         unsigned int tot_len = 0;
1265         int i;
1266
1267         for (i = 0; i < HNS3_MAX_NON_TSO_BD_NUM - 1U; i++)
1268                 tot_len += bd_size[i];
1269
1270         /* ensure the first 8 frags is greater than mss + header */
1271         if (tot_len + bd_size[HNS3_MAX_NON_TSO_BD_NUM - 1U] <
1272             skb_shinfo(skb)->gso_size + hns3_gso_hdr_len(skb))
1273                 return true;
1274
1275         /* ensure every continuous 7 buffer is greater than mss
1276          * except the last one.
1277          */
1278         for (i = 0; i < bd_num - HNS3_MAX_NON_TSO_BD_NUM; i++) {
1279                 tot_len -= bd_size[i];
1280                 tot_len += bd_size[i + HNS3_MAX_NON_TSO_BD_NUM - 1U];
1281
1282                 if (tot_len < skb_shinfo(skb)->gso_size)
1283                         return true;
1284         }
1285
1286         return false;
1287 }
1288
1289 static int hns3_nic_maybe_stop_tx(struct hns3_enet_ring *ring,
1290                                   struct sk_buff **out_skb)
1291 {
1292         unsigned int bd_size[HNS3_MAX_TSO_BD_NUM + 1U];
1293         struct sk_buff *skb = *out_skb;
1294         unsigned int bd_num;
1295
1296         bd_num = hns3_tx_bd_num(skb, bd_size);
1297         if (unlikely(bd_num > HNS3_MAX_NON_TSO_BD_NUM)) {
1298                 struct sk_buff *new_skb;
1299
1300                 if (bd_num <= HNS3_MAX_TSO_BD_NUM && skb_is_gso(skb) &&
1301                     !hns3_skb_need_linearized(skb, bd_size, bd_num))
1302                         goto out;
1303
1304                 /* manual split the send packet */
1305                 new_skb = skb_copy(skb, GFP_ATOMIC);
1306                 if (!new_skb)
1307                         return -ENOMEM;
1308                 dev_kfree_skb_any(skb);
1309                 *out_skb = new_skb;
1310
1311                 bd_num = hns3_tx_bd_count(new_skb->len);
1312                 if ((skb_is_gso(new_skb) && bd_num > HNS3_MAX_TSO_BD_NUM) ||
1313                     (!skb_is_gso(new_skb) &&
1314                      bd_num > HNS3_MAX_NON_TSO_BD_NUM))
1315                         return -ENOMEM;
1316
1317                 u64_stats_update_begin(&ring->syncp);
1318                 ring->stats.tx_copy++;
1319                 u64_stats_update_end(&ring->syncp);
1320         }
1321
1322 out:
1323         if (unlikely(ring_space(ring) < bd_num))
1324                 return -EBUSY;
1325
1326         return bd_num;
1327 }
1328
1329 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1330 {
1331         struct device *dev = ring_to_dev(ring);
1332         unsigned int i;
1333
1334         for (i = 0; i < ring->desc_num; i++) {
1335                 /* check if this is where we started */
1336                 if (ring->next_to_use == next_to_use_orig)
1337                         break;
1338
1339                 /* rollback one */
1340                 ring_ptr_move_bw(ring, next_to_use);
1341
1342                 /* unmap the descriptor dma address */
1343                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1344                         dma_unmap_single(dev,
1345                                          ring->desc_cb[ring->next_to_use].dma,
1346                                         ring->desc_cb[ring->next_to_use].length,
1347                                         DMA_TO_DEVICE);
1348                 else if (ring->desc_cb[ring->next_to_use].length)
1349                         dma_unmap_page(dev,
1350                                        ring->desc_cb[ring->next_to_use].dma,
1351                                        ring->desc_cb[ring->next_to_use].length,
1352                                        DMA_TO_DEVICE);
1353
1354                 ring->desc_cb[ring->next_to_use].length = 0;
1355                 ring->desc_cb[ring->next_to_use].dma = 0;
1356         }
1357 }
1358
1359 static int hns3_fill_skb_to_desc(struct hns3_enet_ring *ring,
1360                                  struct sk_buff *skb, enum hns_desc_type type)
1361 {
1362         unsigned int size = skb_headlen(skb);
1363         int i, ret, bd_num = 0;
1364
1365         if (size) {
1366                 ret = hns3_fill_desc(ring, skb, size, type);
1367                 if (unlikely(ret < 0))
1368                         return ret;
1369
1370                 bd_num += ret;
1371         }
1372
1373         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1374                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1375
1376                 size = skb_frag_size(frag);
1377                 if (!size)
1378                         continue;
1379
1380                 ret = hns3_fill_desc(ring, frag, size, DESC_TYPE_PAGE);
1381                 if (unlikely(ret < 0))
1382                         return ret;
1383
1384                 bd_num += ret;
1385         }
1386
1387         return bd_num;
1388 }
1389
1390 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1391 {
1392         struct hns3_nic_priv *priv = netdev_priv(netdev);
1393         struct hns3_nic_ring_data *ring_data =
1394                 &tx_ring_data(priv, skb->queue_mapping);
1395         struct hns3_enet_ring *ring = ring_data->ring;
1396         struct netdev_queue *dev_queue;
1397         int pre_ntu, next_to_use_head;
1398         struct sk_buff *frag_skb;
1399         int bd_num = 0;
1400         int ret;
1401
1402         /* Prefetch the data used later */
1403         prefetch(skb->data);
1404
1405         ret = hns3_nic_maybe_stop_tx(ring, &skb);
1406         if (unlikely(ret <= 0)) {
1407                 if (ret == -EBUSY) {
1408                         u64_stats_update_begin(&ring->syncp);
1409                         ring->stats.tx_busy++;
1410                         u64_stats_update_end(&ring->syncp);
1411                         goto out_net_tx_busy;
1412                 } else if (ret == -ENOMEM) {
1413                         u64_stats_update_begin(&ring->syncp);
1414                         ring->stats.sw_err_cnt++;
1415                         u64_stats_update_end(&ring->syncp);
1416                 }
1417
1418                 hns3_rl_err(netdev, "xmit error: %d!\n", ret);
1419                 goto out_err_tx_ok;
1420         }
1421
1422         next_to_use_head = ring->next_to_use;
1423
1424         ret = hns3_fill_skb_to_desc(ring, skb, DESC_TYPE_SKB);
1425         if (unlikely(ret < 0))
1426                 goto fill_err;
1427
1428         bd_num += ret;
1429
1430         if (!skb_has_frag_list(skb))
1431                 goto out;
1432
1433         skb_walk_frags(skb, frag_skb) {
1434                 ret = hns3_fill_skb_to_desc(ring, frag_skb, DESC_TYPE_PAGE);
1435                 if (unlikely(ret < 0))
1436                         goto fill_err;
1437
1438                 bd_num += ret;
1439         }
1440 out:
1441         pre_ntu = ring->next_to_use ? (ring->next_to_use - 1) :
1442                                         (ring->desc_num - 1);
1443         ring->desc[pre_ntu].tx.bdtp_fe_sc_vld_ra_ri |=
1444                                 cpu_to_le16(BIT(HNS3_TXD_FE_B));
1445
1446         /* Complete translate all packets */
1447         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1448         netdev_tx_sent_queue(dev_queue, skb->len);
1449
1450         wmb(); /* Commit all data before submit */
1451
1452         hnae3_queue_xmit(ring->tqp, bd_num);
1453
1454         return NETDEV_TX_OK;
1455
1456 fill_err:
1457         hns3_clear_desc(ring, next_to_use_head);
1458
1459 out_err_tx_ok:
1460         dev_kfree_skb_any(skb);
1461         return NETDEV_TX_OK;
1462
1463 out_net_tx_busy:
1464         netif_stop_subqueue(netdev, ring_data->queue_index);
1465         smp_mb(); /* Commit all data before submit */
1466
1467         return NETDEV_TX_BUSY;
1468 }
1469
1470 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1471 {
1472         struct hnae3_handle *h = hns3_get_handle(netdev);
1473         struct sockaddr *mac_addr = p;
1474         int ret;
1475
1476         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1477                 return -EADDRNOTAVAIL;
1478
1479         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1480                 netdev_info(netdev, "already using mac address %pM\n",
1481                             mac_addr->sa_data);
1482                 return 0;
1483         }
1484
1485         /* For VF device, if there is a perm_addr, then the user will not
1486          * be allowed to change the address.
1487          */
1488         if (!hns3_is_phys_func(h->pdev) &&
1489             !is_zero_ether_addr(netdev->perm_addr)) {
1490                 netdev_err(netdev, "has permanent MAC %pM, user MAC %pM not allow\n",
1491                            netdev->perm_addr, mac_addr->sa_data);
1492                 return -EPERM;
1493         }
1494
1495         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1496         if (ret) {
1497                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1498                 return ret;
1499         }
1500
1501         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1502
1503         return 0;
1504 }
1505
1506 static int hns3_nic_do_ioctl(struct net_device *netdev,
1507                              struct ifreq *ifr, int cmd)
1508 {
1509         struct hnae3_handle *h = hns3_get_handle(netdev);
1510
1511         if (!netif_running(netdev))
1512                 return -EINVAL;
1513
1514         if (!h->ae_algo->ops->do_ioctl)
1515                 return -EOPNOTSUPP;
1516
1517         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1518 }
1519
1520 static int hns3_nic_set_features(struct net_device *netdev,
1521                                  netdev_features_t features)
1522 {
1523         netdev_features_t changed = netdev->features ^ features;
1524         struct hns3_nic_priv *priv = netdev_priv(netdev);
1525         struct hnae3_handle *h = priv->ae_handle;
1526         bool enable;
1527         int ret;
1528
1529         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1530                 enable = !!(features & NETIF_F_GRO_HW);
1531                 ret = h->ae_algo->ops->set_gro_en(h, enable);
1532                 if (ret)
1533                         return ret;
1534         }
1535
1536         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1537             h->ae_algo->ops->enable_vlan_filter) {
1538                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_FILTER);
1539                 h->ae_algo->ops->enable_vlan_filter(h, enable);
1540         }
1541
1542         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1543             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1544                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
1545                 ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, enable);
1546                 if (ret)
1547                         return ret;
1548         }
1549
1550         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1551                 enable = !!(features & NETIF_F_NTUPLE);
1552                 h->ae_algo->ops->enable_fd(h, enable);
1553         }
1554
1555         netdev->features = features;
1556         return 0;
1557 }
1558
1559 static void hns3_nic_get_stats64(struct net_device *netdev,
1560                                  struct rtnl_link_stats64 *stats)
1561 {
1562         struct hns3_nic_priv *priv = netdev_priv(netdev);
1563         int queue_num = priv->ae_handle->kinfo.num_tqps;
1564         struct hnae3_handle *handle = priv->ae_handle;
1565         struct hns3_enet_ring *ring;
1566         u64 rx_length_errors = 0;
1567         u64 rx_crc_errors = 0;
1568         u64 rx_multicast = 0;
1569         unsigned int start;
1570         u64 tx_errors = 0;
1571         u64 rx_errors = 0;
1572         unsigned int idx;
1573         u64 tx_bytes = 0;
1574         u64 rx_bytes = 0;
1575         u64 tx_pkts = 0;
1576         u64 rx_pkts = 0;
1577         u64 tx_drop = 0;
1578         u64 rx_drop = 0;
1579
1580         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1581                 return;
1582
1583         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1584
1585         for (idx = 0; idx < queue_num; idx++) {
1586                 /* fetch the tx stats */
1587                 ring = priv->ring_data[idx].ring;
1588                 do {
1589                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1590                         tx_bytes += ring->stats.tx_bytes;
1591                         tx_pkts += ring->stats.tx_pkts;
1592                         tx_drop += ring->stats.sw_err_cnt;
1593                         tx_drop += ring->stats.tx_vlan_err;
1594                         tx_drop += ring->stats.tx_l4_proto_err;
1595                         tx_drop += ring->stats.tx_l2l3l4_err;
1596                         tx_drop += ring->stats.tx_tso_err;
1597                         tx_errors += ring->stats.sw_err_cnt;
1598                         tx_errors += ring->stats.tx_vlan_err;
1599                         tx_errors += ring->stats.tx_l4_proto_err;
1600                         tx_errors += ring->stats.tx_l2l3l4_err;
1601                         tx_errors += ring->stats.tx_tso_err;
1602                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1603
1604                 /* fetch the rx stats */
1605                 ring = priv->ring_data[idx + queue_num].ring;
1606                 do {
1607                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1608                         rx_bytes += ring->stats.rx_bytes;
1609                         rx_pkts += ring->stats.rx_pkts;
1610                         rx_drop += ring->stats.l2_err;
1611                         rx_errors += ring->stats.l2_err;
1612                         rx_errors += ring->stats.l3l4_csum_err;
1613                         rx_crc_errors += ring->stats.l2_err;
1614                         rx_multicast += ring->stats.rx_multicast;
1615                         rx_length_errors += ring->stats.err_pkt_len;
1616                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1617         }
1618
1619         stats->tx_bytes = tx_bytes;
1620         stats->tx_packets = tx_pkts;
1621         stats->rx_bytes = rx_bytes;
1622         stats->rx_packets = rx_pkts;
1623
1624         stats->rx_errors = rx_errors;
1625         stats->multicast = rx_multicast;
1626         stats->rx_length_errors = rx_length_errors;
1627         stats->rx_crc_errors = rx_crc_errors;
1628         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1629
1630         stats->tx_errors = tx_errors;
1631         stats->rx_dropped = rx_drop;
1632         stats->tx_dropped = tx_drop;
1633         stats->collisions = netdev->stats.collisions;
1634         stats->rx_over_errors = netdev->stats.rx_over_errors;
1635         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1636         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1637         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1638         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1639         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1640         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1641         stats->tx_window_errors = netdev->stats.tx_window_errors;
1642         stats->rx_compressed = netdev->stats.rx_compressed;
1643         stats->tx_compressed = netdev->stats.tx_compressed;
1644 }
1645
1646 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1647 {
1648         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1649         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1650         struct hnae3_knic_private_info *kinfo;
1651         u8 tc = mqprio_qopt->qopt.num_tc;
1652         u16 mode = mqprio_qopt->mode;
1653         u8 hw = mqprio_qopt->qopt.hw;
1654         struct hnae3_handle *h;
1655
1656         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1657                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1658                 return -EOPNOTSUPP;
1659
1660         if (tc > HNAE3_MAX_TC)
1661                 return -EINVAL;
1662
1663         if (!netdev)
1664                 return -EINVAL;
1665
1666         h = hns3_get_handle(netdev);
1667         kinfo = &h->kinfo;
1668
1669         netif_dbg(h, drv, netdev, "setup tc: num_tc=%u\n", tc);
1670
1671         return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1672                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1673 }
1674
1675 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1676                              void *type_data)
1677 {
1678         if (type != TC_SETUP_QDISC_MQPRIO)
1679                 return -EOPNOTSUPP;
1680
1681         return hns3_setup_tc(dev, type_data);
1682 }
1683
1684 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1685                                 __be16 proto, u16 vid)
1686 {
1687         struct hnae3_handle *h = hns3_get_handle(netdev);
1688         int ret = -EIO;
1689
1690         if (h->ae_algo->ops->set_vlan_filter)
1691                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1692
1693         return ret;
1694 }
1695
1696 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1697                                  __be16 proto, u16 vid)
1698 {
1699         struct hnae3_handle *h = hns3_get_handle(netdev);
1700         int ret = -EIO;
1701
1702         if (h->ae_algo->ops->set_vlan_filter)
1703                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1704
1705         return ret;
1706 }
1707
1708 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1709                                 u8 qos, __be16 vlan_proto)
1710 {
1711         struct hnae3_handle *h = hns3_get_handle(netdev);
1712         int ret = -EIO;
1713
1714         netif_dbg(h, drv, netdev,
1715                   "set vf vlan: vf=%d, vlan=%u, qos=%u, vlan_proto=%u\n",
1716                   vf, vlan, qos, vlan_proto);
1717
1718         if (h->ae_algo->ops->set_vf_vlan_filter)
1719                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1720                                                           qos, vlan_proto);
1721
1722         return ret;
1723 }
1724
1725 static int hns3_set_vf_spoofchk(struct net_device *netdev, int vf, bool enable)
1726 {
1727         struct hnae3_handle *handle = hns3_get_handle(netdev);
1728
1729         if (hns3_nic_resetting(netdev))
1730                 return -EBUSY;
1731
1732         if (!handle->ae_algo->ops->set_vf_spoofchk)
1733                 return -EOPNOTSUPP;
1734
1735         return handle->ae_algo->ops->set_vf_spoofchk(handle, vf, enable);
1736 }
1737
1738 static int hns3_set_vf_trust(struct net_device *netdev, int vf, bool enable)
1739 {
1740         struct hnae3_handle *handle = hns3_get_handle(netdev);
1741
1742         if (!handle->ae_algo->ops->set_vf_trust)
1743                 return -EOPNOTSUPP;
1744
1745         return handle->ae_algo->ops->set_vf_trust(handle, vf, enable);
1746 }
1747
1748 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1749 {
1750         struct hnae3_handle *h = hns3_get_handle(netdev);
1751         int ret;
1752
1753         if (hns3_nic_resetting(netdev))
1754                 return -EBUSY;
1755
1756         if (!h->ae_algo->ops->set_mtu)
1757                 return -EOPNOTSUPP;
1758
1759         netif_dbg(h, drv, netdev,
1760                   "change mtu from %u to %d\n", netdev->mtu, new_mtu);
1761
1762         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1763         if (ret)
1764                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1765                            ret);
1766         else
1767                 netdev->mtu = new_mtu;
1768
1769         return ret;
1770 }
1771
1772 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1773 {
1774         struct hns3_nic_priv *priv = netdev_priv(ndev);
1775         struct hnae3_handle *h = hns3_get_handle(ndev);
1776         struct hns3_enet_ring *tx_ring = NULL;
1777         struct napi_struct *napi;
1778         int timeout_queue = 0;
1779         int hw_head, hw_tail;
1780         int fbd_num, fbd_oft;
1781         int ebd_num, ebd_oft;
1782         int bd_num, bd_err;
1783         int ring_en, tc;
1784         int i;
1785
1786         /* Find the stopped queue the same way the stack does */
1787         for (i = 0; i < ndev->num_tx_queues; i++) {
1788                 struct netdev_queue *q;
1789                 unsigned long trans_start;
1790
1791                 q = netdev_get_tx_queue(ndev, i);
1792                 trans_start = q->trans_start;
1793                 if (netif_xmit_stopped(q) &&
1794                     time_after(jiffies,
1795                                (trans_start + ndev->watchdog_timeo))) {
1796                         timeout_queue = i;
1797                         break;
1798                 }
1799         }
1800
1801         if (i == ndev->num_tx_queues) {
1802                 netdev_info(ndev,
1803                             "no netdev TX timeout queue found, timeout count: %llu\n",
1804                             priv->tx_timeout_count);
1805                 return false;
1806         }
1807
1808         priv->tx_timeout_count++;
1809
1810         tx_ring = priv->ring_data[timeout_queue].ring;
1811         napi = &tx_ring->tqp_vector->napi;
1812
1813         netdev_info(ndev,
1814                     "tx_timeout count: %llu, queue id: %d, SW_NTU: 0x%x, SW_NTC: 0x%x, napi state: %lu\n",
1815                     priv->tx_timeout_count, timeout_queue, tx_ring->next_to_use,
1816                     tx_ring->next_to_clean, napi->state);
1817
1818         netdev_info(ndev,
1819                     "tx_pkts: %llu, tx_bytes: %llu, io_err_cnt: %llu, sw_err_cnt: %llu\n",
1820                     tx_ring->stats.tx_pkts, tx_ring->stats.tx_bytes,
1821                     tx_ring->stats.io_err_cnt, tx_ring->stats.sw_err_cnt);
1822
1823         netdev_info(ndev,
1824                     "seg_pkt_cnt: %llu, tx_err_cnt: %llu, restart_queue: %llu, tx_busy: %llu\n",
1825                     tx_ring->stats.seg_pkt_cnt, tx_ring->stats.tx_err_cnt,
1826                     tx_ring->stats.restart_queue, tx_ring->stats.tx_busy);
1827
1828         /* When mac received many pause frames continuous, it's unable to send
1829          * packets, which may cause tx timeout
1830          */
1831         if (h->ae_algo->ops->get_mac_stats) {
1832                 struct hns3_mac_stats mac_stats;
1833
1834                 h->ae_algo->ops->get_mac_stats(h, &mac_stats);
1835                 netdev_info(ndev, "tx_pause_cnt: %llu, rx_pause_cnt: %llu\n",
1836                             mac_stats.tx_pause_cnt, mac_stats.rx_pause_cnt);
1837         }
1838
1839         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1840                                 HNS3_RING_TX_RING_HEAD_REG);
1841         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1842                                 HNS3_RING_TX_RING_TAIL_REG);
1843         fbd_num = readl_relaxed(tx_ring->tqp->io_base +
1844                                 HNS3_RING_TX_RING_FBDNUM_REG);
1845         fbd_oft = readl_relaxed(tx_ring->tqp->io_base +
1846                                 HNS3_RING_TX_RING_OFFSET_REG);
1847         ebd_num = readl_relaxed(tx_ring->tqp->io_base +
1848                                 HNS3_RING_TX_RING_EBDNUM_REG);
1849         ebd_oft = readl_relaxed(tx_ring->tqp->io_base +
1850                                 HNS3_RING_TX_RING_EBD_OFFSET_REG);
1851         bd_num = readl_relaxed(tx_ring->tqp->io_base +
1852                                HNS3_RING_TX_RING_BD_NUM_REG);
1853         bd_err = readl_relaxed(tx_ring->tqp->io_base +
1854                                HNS3_RING_TX_RING_BD_ERR_REG);
1855         ring_en = readl_relaxed(tx_ring->tqp->io_base + HNS3_RING_EN_REG);
1856         tc = readl_relaxed(tx_ring->tqp->io_base + HNS3_RING_TX_RING_TC_REG);
1857
1858         netdev_info(ndev,
1859                     "BD_NUM: 0x%x HW_HEAD: 0x%x, HW_TAIL: 0x%x, BD_ERR: 0x%x, INT: 0x%x\n",
1860                     bd_num, hw_head, hw_tail, bd_err,
1861                     readl(tx_ring->tqp_vector->mask_addr));
1862         netdev_info(ndev,
1863                     "RING_EN: 0x%x, TC: 0x%x, FBD_NUM: 0x%x FBD_OFT: 0x%x, EBD_NUM: 0x%x, EBD_OFT: 0x%x\n",
1864                     ring_en, tc, fbd_num, fbd_oft, ebd_num, ebd_oft);
1865
1866         return true;
1867 }
1868
1869 static void hns3_nic_net_timeout(struct net_device *ndev)
1870 {
1871         struct hns3_nic_priv *priv = netdev_priv(ndev);
1872         struct hnae3_handle *h = priv->ae_handle;
1873
1874         if (!hns3_get_tx_timeo_queue_info(ndev))
1875                 return;
1876
1877         /* request the reset, and let the hclge to determine
1878          * which reset level should be done
1879          */
1880         if (h->ae_algo->ops->reset_event)
1881                 h->ae_algo->ops->reset_event(h->pdev, h);
1882 }
1883
1884 #ifdef CONFIG_RFS_ACCEL
1885 static int hns3_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
1886                               u16 rxq_index, u32 flow_id)
1887 {
1888         struct hnae3_handle *h = hns3_get_handle(dev);
1889         struct flow_keys fkeys;
1890
1891         if (!h->ae_algo->ops->add_arfs_entry)
1892                 return -EOPNOTSUPP;
1893
1894         if (skb->encapsulation)
1895                 return -EPROTONOSUPPORT;
1896
1897         if (!skb_flow_dissect_flow_keys(skb, &fkeys, 0))
1898                 return -EPROTONOSUPPORT;
1899
1900         if ((fkeys.basic.n_proto != htons(ETH_P_IP) &&
1901              fkeys.basic.n_proto != htons(ETH_P_IPV6)) ||
1902             (fkeys.basic.ip_proto != IPPROTO_TCP &&
1903              fkeys.basic.ip_proto != IPPROTO_UDP))
1904                 return -EPROTONOSUPPORT;
1905
1906         return h->ae_algo->ops->add_arfs_entry(h, rxq_index, flow_id, &fkeys);
1907 }
1908 #endif
1909
1910 static int hns3_nic_get_vf_config(struct net_device *ndev, int vf,
1911                                   struct ifla_vf_info *ivf)
1912 {
1913         struct hnae3_handle *h = hns3_get_handle(ndev);
1914
1915         if (!h->ae_algo->ops->get_vf_config)
1916                 return -EOPNOTSUPP;
1917
1918         return h->ae_algo->ops->get_vf_config(h, vf, ivf);
1919 }
1920
1921 static int hns3_nic_set_vf_link_state(struct net_device *ndev, int vf,
1922                                       int link_state)
1923 {
1924         struct hnae3_handle *h = hns3_get_handle(ndev);
1925
1926         if (!h->ae_algo->ops->set_vf_link_state)
1927                 return -EOPNOTSUPP;
1928
1929         return h->ae_algo->ops->set_vf_link_state(h, vf, link_state);
1930 }
1931
1932 static int hns3_nic_set_vf_rate(struct net_device *ndev, int vf,
1933                                 int min_tx_rate, int max_tx_rate)
1934 {
1935         struct hnae3_handle *h = hns3_get_handle(ndev);
1936
1937         if (!h->ae_algo->ops->set_vf_rate)
1938                 return -EOPNOTSUPP;
1939
1940         return h->ae_algo->ops->set_vf_rate(h, vf, min_tx_rate, max_tx_rate,
1941                                             false);
1942 }
1943
1944 static int hns3_nic_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
1945 {
1946         struct hnae3_handle *h = hns3_get_handle(netdev);
1947
1948         if (!h->ae_algo->ops->set_vf_mac)
1949                 return -EOPNOTSUPP;
1950
1951         if (is_multicast_ether_addr(mac)) {
1952                 netdev_err(netdev,
1953                            "Invalid MAC:%pM specified. Could not set MAC\n",
1954                            mac);
1955                 return -EINVAL;
1956         }
1957
1958         return h->ae_algo->ops->set_vf_mac(h, vf_id, mac);
1959 }
1960
1961 static const struct net_device_ops hns3_nic_netdev_ops = {
1962         .ndo_open               = hns3_nic_net_open,
1963         .ndo_stop               = hns3_nic_net_stop,
1964         .ndo_start_xmit         = hns3_nic_net_xmit,
1965         .ndo_tx_timeout         = hns3_nic_net_timeout,
1966         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1967         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1968         .ndo_change_mtu         = hns3_nic_change_mtu,
1969         .ndo_set_features       = hns3_nic_set_features,
1970         .ndo_get_stats64        = hns3_nic_get_stats64,
1971         .ndo_setup_tc           = hns3_nic_setup_tc,
1972         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1973         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1974         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1975         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1976         .ndo_set_vf_spoofchk    = hns3_set_vf_spoofchk,
1977         .ndo_set_vf_trust       = hns3_set_vf_trust,
1978 #ifdef CONFIG_RFS_ACCEL
1979         .ndo_rx_flow_steer      = hns3_rx_flow_steer,
1980 #endif
1981         .ndo_get_vf_config      = hns3_nic_get_vf_config,
1982         .ndo_set_vf_link_state  = hns3_nic_set_vf_link_state,
1983         .ndo_set_vf_rate        = hns3_nic_set_vf_rate,
1984         .ndo_set_vf_mac         = hns3_nic_set_vf_mac,
1985 };
1986
1987 bool hns3_is_phys_func(struct pci_dev *pdev)
1988 {
1989         u32 dev_id = pdev->device;
1990
1991         switch (dev_id) {
1992         case HNAE3_DEV_ID_GE:
1993         case HNAE3_DEV_ID_25GE:
1994         case HNAE3_DEV_ID_25GE_RDMA:
1995         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1996         case HNAE3_DEV_ID_50GE_RDMA:
1997         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1998         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1999                 return true;
2000         case HNAE3_DEV_ID_100G_VF:
2001         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
2002                 return false;
2003         default:
2004                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
2005                          dev_id);
2006         }
2007
2008         return false;
2009 }
2010
2011 static void hns3_disable_sriov(struct pci_dev *pdev)
2012 {
2013         /* If our VFs are assigned we cannot shut down SR-IOV
2014          * without causing issues, so just leave the hardware
2015          * available but disabled
2016          */
2017         if (pci_vfs_assigned(pdev)) {
2018                 dev_warn(&pdev->dev,
2019                          "disabling driver while VFs are assigned\n");
2020                 return;
2021         }
2022
2023         pci_disable_sriov(pdev);
2024 }
2025
2026 static void hns3_get_dev_capability(struct pci_dev *pdev,
2027                                     struct hnae3_ae_dev *ae_dev)
2028 {
2029         if (pdev->revision >= 0x21) {
2030                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
2031                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
2032         }
2033 }
2034
2035 /* hns3_probe - Device initialization routine
2036  * @pdev: PCI device information struct
2037  * @ent: entry in hns3_pci_tbl
2038  *
2039  * hns3_probe initializes a PF identified by a pci_dev structure.
2040  * The OS initialization, configuring of the PF private structure,
2041  * and a hardware reset occur.
2042  *
2043  * Returns 0 on success, negative on failure
2044  */
2045 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2046 {
2047         struct hnae3_ae_dev *ae_dev;
2048         int ret;
2049
2050         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev), GFP_KERNEL);
2051         if (!ae_dev) {
2052                 ret = -ENOMEM;
2053                 return ret;
2054         }
2055
2056         ae_dev->pdev = pdev;
2057         ae_dev->flag = ent->driver_data;
2058         ae_dev->reset_type = HNAE3_NONE_RESET;
2059         hns3_get_dev_capability(pdev, ae_dev);
2060         pci_set_drvdata(pdev, ae_dev);
2061
2062         ret = hnae3_register_ae_dev(ae_dev);
2063         if (ret) {
2064                 devm_kfree(&pdev->dev, ae_dev);
2065                 pci_set_drvdata(pdev, NULL);
2066         }
2067
2068         return ret;
2069 }
2070
2071 /* hns3_remove - Device removal routine
2072  * @pdev: PCI device information struct
2073  */
2074 static void hns3_remove(struct pci_dev *pdev)
2075 {
2076         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2077
2078         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
2079                 hns3_disable_sriov(pdev);
2080
2081         hnae3_unregister_ae_dev(ae_dev);
2082         pci_set_drvdata(pdev, NULL);
2083 }
2084
2085 /**
2086  * hns3_pci_sriov_configure
2087  * @pdev: pointer to a pci_dev structure
2088  * @num_vfs: number of VFs to allocate
2089  *
2090  * Enable or change the number of VFs. Called when the user updates the number
2091  * of VFs in sysfs.
2092  **/
2093 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
2094 {
2095         int ret;
2096
2097         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
2098                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
2099                 return -EINVAL;
2100         }
2101
2102         if (num_vfs) {
2103                 ret = pci_enable_sriov(pdev, num_vfs);
2104                 if (ret)
2105                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
2106                 else
2107                         return num_vfs;
2108         } else if (!pci_vfs_assigned(pdev)) {
2109                 pci_disable_sriov(pdev);
2110         } else {
2111                 dev_warn(&pdev->dev,
2112                          "Unable to free VFs because some are assigned to VMs.\n");
2113         }
2114
2115         return 0;
2116 }
2117
2118 static void hns3_shutdown(struct pci_dev *pdev)
2119 {
2120         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2121
2122         hnae3_unregister_ae_dev(ae_dev);
2123         devm_kfree(&pdev->dev, ae_dev);
2124         pci_set_drvdata(pdev, NULL);
2125
2126         if (system_state == SYSTEM_POWER_OFF)
2127                 pci_set_power_state(pdev, PCI_D3hot);
2128 }
2129
2130 static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
2131                                             pci_channel_state_t state)
2132 {
2133         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2134         pci_ers_result_t ret;
2135
2136         dev_info(&pdev->dev, "PCI error detected, state(=%d)!!\n", state);
2137
2138         if (state == pci_channel_io_perm_failure)
2139                 return PCI_ERS_RESULT_DISCONNECT;
2140
2141         if (!ae_dev || !ae_dev->ops) {
2142                 dev_err(&pdev->dev,
2143                         "Can't recover - error happened before device initialized\n");
2144                 return PCI_ERS_RESULT_NONE;
2145         }
2146
2147         if (ae_dev->ops->handle_hw_ras_error)
2148                 ret = ae_dev->ops->handle_hw_ras_error(ae_dev);
2149         else
2150                 return PCI_ERS_RESULT_NONE;
2151
2152         return ret;
2153 }
2154
2155 static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
2156 {
2157         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2158         const struct hnae3_ae_ops *ops;
2159         enum hnae3_reset_type reset_type;
2160         struct device *dev = &pdev->dev;
2161
2162         if (!ae_dev || !ae_dev->ops)
2163                 return PCI_ERS_RESULT_NONE;
2164
2165         ops = ae_dev->ops;
2166         /* request the reset */
2167         if (ops->reset_event && ops->get_reset_level &&
2168             ops->set_default_reset_request) {
2169                 if (ae_dev->hw_err_reset_req) {
2170                         reset_type = ops->get_reset_level(ae_dev,
2171                                                 &ae_dev->hw_err_reset_req);
2172                         ops->set_default_reset_request(ae_dev, reset_type);
2173                         dev_info(dev, "requesting reset due to PCI error\n");
2174                         ops->reset_event(pdev, NULL);
2175                 }
2176
2177                 return PCI_ERS_RESULT_RECOVERED;
2178         }
2179
2180         return PCI_ERS_RESULT_DISCONNECT;
2181 }
2182
2183 static void hns3_reset_prepare(struct pci_dev *pdev)
2184 {
2185         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2186
2187         dev_info(&pdev->dev, "hns3 flr prepare\n");
2188         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_prepare)
2189                 ae_dev->ops->flr_prepare(ae_dev);
2190 }
2191
2192 static void hns3_reset_done(struct pci_dev *pdev)
2193 {
2194         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2195
2196         dev_info(&pdev->dev, "hns3 flr done\n");
2197         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_done)
2198                 ae_dev->ops->flr_done(ae_dev);
2199 }
2200
2201 static const struct pci_error_handlers hns3_err_handler = {
2202         .error_detected = hns3_error_detected,
2203         .slot_reset     = hns3_slot_reset,
2204         .reset_prepare  = hns3_reset_prepare,
2205         .reset_done     = hns3_reset_done,
2206 };
2207
2208 static struct pci_driver hns3_driver = {
2209         .name     = hns3_driver_name,
2210         .id_table = hns3_pci_tbl,
2211         .probe    = hns3_probe,
2212         .remove   = hns3_remove,
2213         .shutdown = hns3_shutdown,
2214         .sriov_configure = hns3_pci_sriov_configure,
2215         .err_handler    = &hns3_err_handler,
2216 };
2217
2218 /* set default feature to hns3 */
2219 static void hns3_set_default_feature(struct net_device *netdev)
2220 {
2221         struct hnae3_handle *h = hns3_get_handle(netdev);
2222         struct pci_dev *pdev = h->pdev;
2223
2224         netdev->priv_flags |= IFF_UNICAST_FLT;
2225
2226         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2227                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2228                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2229                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2230                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2231                 NETIF_F_TSO_MANGLEID | NETIF_F_FRAGLIST;
2232
2233         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2234
2235         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2236                 NETIF_F_HW_VLAN_CTAG_FILTER |
2237                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2238                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2239                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2240                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2241                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2242                 NETIF_F_FRAGLIST;
2243
2244         netdev->vlan_features |=
2245                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
2246                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
2247                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2248                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2249                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2250                 NETIF_F_FRAGLIST;
2251
2252         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2253                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2254                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2255                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2256                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2257                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2258                 NETIF_F_FRAGLIST;
2259
2260         if (pdev->revision >= 0x21) {
2261                 netdev->hw_features |= NETIF_F_GRO_HW;
2262                 netdev->features |= NETIF_F_GRO_HW;
2263
2264                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
2265                         netdev->hw_features |= NETIF_F_NTUPLE;
2266                         netdev->features |= NETIF_F_NTUPLE;
2267                 }
2268         }
2269 }
2270
2271 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
2272                              struct hns3_desc_cb *cb)
2273 {
2274         unsigned int order = hns3_page_order(ring);
2275         struct page *p;
2276
2277         p = dev_alloc_pages(order);
2278         if (!p)
2279                 return -ENOMEM;
2280
2281         cb->priv = p;
2282         cb->page_offset = 0;
2283         cb->reuse_flag = 0;
2284         cb->buf  = page_address(p);
2285         cb->length = hns3_page_size(ring);
2286         cb->type = DESC_TYPE_PAGE;
2287
2288         return 0;
2289 }
2290
2291 static void hns3_free_buffer(struct hns3_enet_ring *ring,
2292                              struct hns3_desc_cb *cb)
2293 {
2294         if (cb->type == DESC_TYPE_SKB)
2295                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
2296         else if (!HNAE3_IS_TX_RING(ring))
2297                 put_page((struct page *)cb->priv);
2298         memset(cb, 0, sizeof(*cb));
2299 }
2300
2301 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
2302 {
2303         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
2304                                cb->length, ring_to_dma_dir(ring));
2305
2306         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
2307                 return -EIO;
2308
2309         return 0;
2310 }
2311
2312 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
2313                               struct hns3_desc_cb *cb)
2314 {
2315         if (cb->type == DESC_TYPE_SKB)
2316                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
2317                                  ring_to_dma_dir(ring));
2318         else if (cb->length)
2319                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
2320                                ring_to_dma_dir(ring));
2321 }
2322
2323 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2324 {
2325         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2326         ring->desc[i].addr = 0;
2327 }
2328
2329 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2330 {
2331         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2332
2333         if (!ring->desc_cb[i].dma)
2334                 return;
2335
2336         hns3_buffer_detach(ring, i);
2337         hns3_free_buffer(ring, cb);
2338 }
2339
2340 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2341 {
2342         int i;
2343
2344         for (i = 0; i < ring->desc_num; i++)
2345                 hns3_free_buffer_detach(ring, i);
2346 }
2347
2348 /* free desc along with its attached buffer */
2349 static void hns3_free_desc(struct hns3_enet_ring *ring)
2350 {
2351         int size = ring->desc_num * sizeof(ring->desc[0]);
2352
2353         hns3_free_buffers(ring);
2354
2355         if (ring->desc) {
2356                 dma_free_coherent(ring_to_dev(ring), size,
2357                                   ring->desc, ring->desc_dma_addr);
2358                 ring->desc = NULL;
2359         }
2360 }
2361
2362 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2363 {
2364         int size = ring->desc_num * sizeof(ring->desc[0]);
2365
2366         ring->desc = dma_alloc_coherent(ring_to_dev(ring), size,
2367                                         &ring->desc_dma_addr, GFP_KERNEL);
2368         if (!ring->desc)
2369                 return -ENOMEM;
2370
2371         return 0;
2372 }
2373
2374 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2375                                    struct hns3_desc_cb *cb)
2376 {
2377         int ret;
2378
2379         ret = hns3_alloc_buffer(ring, cb);
2380         if (ret)
2381                 goto out;
2382
2383         ret = hns3_map_buffer(ring, cb);
2384         if (ret)
2385                 goto out_with_buf;
2386
2387         return 0;
2388
2389 out_with_buf:
2390         hns3_free_buffer(ring, cb);
2391 out:
2392         return ret;
2393 }
2394
2395 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2396 {
2397         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2398
2399         if (ret)
2400                 return ret;
2401
2402         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2403
2404         return 0;
2405 }
2406
2407 /* Allocate memory for raw pkg, and map with dma */
2408 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2409 {
2410         int i, j, ret;
2411
2412         for (i = 0; i < ring->desc_num; i++) {
2413                 ret = hns3_alloc_buffer_attach(ring, i);
2414                 if (ret)
2415                         goto out_buffer_fail;
2416         }
2417
2418         return 0;
2419
2420 out_buffer_fail:
2421         for (j = i - 1; j >= 0; j--)
2422                 hns3_free_buffer_detach(ring, j);
2423         return ret;
2424 }
2425
2426 /* detach a in-used buffer and replace with a reserved one */
2427 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2428                                 struct hns3_desc_cb *res_cb)
2429 {
2430         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2431         ring->desc_cb[i] = *res_cb;
2432         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2433         ring->desc[i].rx.bd_base_info = 0;
2434 }
2435
2436 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2437 {
2438         ring->desc_cb[i].reuse_flag = 0;
2439         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma +
2440                                          ring->desc_cb[i].page_offset);
2441         ring->desc[i].rx.bd_base_info = 0;
2442 }
2443
2444 static void hns3_nic_reclaim_desc(struct hns3_enet_ring *ring, int head,
2445                                   int *bytes, int *pkts)
2446 {
2447         int ntc = ring->next_to_clean;
2448         struct hns3_desc_cb *desc_cb;
2449
2450         while (head != ntc) {
2451                 desc_cb = &ring->desc_cb[ntc];
2452                 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2453                 (*bytes) += desc_cb->length;
2454                 /* desc_cb will be cleaned, after hnae3_free_buffer_detach */
2455                 hns3_free_buffer_detach(ring, ntc);
2456
2457                 if (++ntc == ring->desc_num)
2458                         ntc = 0;
2459
2460                 /* Issue prefetch for next Tx descriptor */
2461                 prefetch(&ring->desc_cb[ntc]);
2462         }
2463
2464         /* This smp_store_release() pairs with smp_load_acquire() in
2465          * ring_space called by hns3_nic_net_xmit.
2466          */
2467         smp_store_release(&ring->next_to_clean, ntc);
2468 }
2469
2470 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2471 {
2472         int u = ring->next_to_use;
2473         int c = ring->next_to_clean;
2474
2475         if (unlikely(h > ring->desc_num))
2476                 return 0;
2477
2478         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2479 }
2480
2481 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2482 {
2483         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2484         struct hns3_nic_priv *priv = netdev_priv(netdev);
2485         struct netdev_queue *dev_queue;
2486         int bytes, pkts;
2487         int head;
2488
2489         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2490         rmb(); /* Make sure head is ready before touch any data */
2491
2492         if (is_ring_empty(ring) || head == ring->next_to_clean)
2493                 return; /* no data to poll */
2494
2495         if (unlikely(!is_valid_clean_head(ring, head))) {
2496                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2497                            ring->next_to_use, ring->next_to_clean);
2498
2499                 u64_stats_update_begin(&ring->syncp);
2500                 ring->stats.io_err_cnt++;
2501                 u64_stats_update_end(&ring->syncp);
2502                 return;
2503         }
2504
2505         bytes = 0;
2506         pkts = 0;
2507         hns3_nic_reclaim_desc(ring, head, &bytes, &pkts);
2508
2509         ring->tqp_vector->tx_group.total_bytes += bytes;
2510         ring->tqp_vector->tx_group.total_packets += pkts;
2511
2512         u64_stats_update_begin(&ring->syncp);
2513         ring->stats.tx_bytes += bytes;
2514         ring->stats.tx_pkts += pkts;
2515         u64_stats_update_end(&ring->syncp);
2516
2517         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2518         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2519
2520         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2521                      ring_space(ring) > HNS3_MAX_TSO_BD_NUM)) {
2522                 /* Make sure that anybody stopping the queue after this
2523                  * sees the new next_to_clean.
2524                  */
2525                 smp_mb();
2526                 if (netif_tx_queue_stopped(dev_queue) &&
2527                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2528                         netif_tx_wake_queue(dev_queue);
2529                         ring->stats.restart_queue++;
2530                 }
2531         }
2532 }
2533
2534 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2535 {
2536         int ntc = ring->next_to_clean;
2537         int ntu = ring->next_to_use;
2538
2539         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2540 }
2541
2542 static void hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring,
2543                                       int cleand_count)
2544 {
2545         struct hns3_desc_cb *desc_cb;
2546         struct hns3_desc_cb res_cbs;
2547         int i, ret;
2548
2549         for (i = 0; i < cleand_count; i++) {
2550                 desc_cb = &ring->desc_cb[ring->next_to_use];
2551                 if (desc_cb->reuse_flag) {
2552                         u64_stats_update_begin(&ring->syncp);
2553                         ring->stats.reuse_pg_cnt++;
2554                         u64_stats_update_end(&ring->syncp);
2555
2556                         hns3_reuse_buffer(ring, ring->next_to_use);
2557                 } else {
2558                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2559                         if (ret) {
2560                                 u64_stats_update_begin(&ring->syncp);
2561                                 ring->stats.sw_err_cnt++;
2562                                 u64_stats_update_end(&ring->syncp);
2563
2564                                 hns3_rl_err(ring->tqp_vector->napi.dev,
2565                                             "alloc rx buffer failed: %d\n",
2566                                             ret);
2567                                 break;
2568                         }
2569                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2570
2571                         u64_stats_update_begin(&ring->syncp);
2572                         ring->stats.non_reuse_pg++;
2573                         u64_stats_update_end(&ring->syncp);
2574                 }
2575
2576                 ring_ptr_move_fw(ring, next_to_use);
2577         }
2578
2579         wmb(); /* Make all data has been write before submit */
2580         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2581 }
2582
2583 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2584                                 struct hns3_enet_ring *ring, int pull_len,
2585                                 struct hns3_desc_cb *desc_cb)
2586 {
2587         struct hns3_desc *desc = &ring->desc[ring->next_to_clean];
2588         int size = le16_to_cpu(desc->rx.size);
2589         u32 truesize = hns3_buf_size(ring);
2590
2591         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2592                         size - pull_len, truesize);
2593
2594         /* Avoid re-using remote pages, or the stack is still using the page
2595          * when page_offset rollback to zero, flag default unreuse
2596          */
2597         if (unlikely(page_to_nid(desc_cb->priv) != numa_mem_id()) ||
2598             (!desc_cb->page_offset && page_count(desc_cb->priv) > 1))
2599                 return;
2600
2601         /* Move offset up to the next cache line */
2602         desc_cb->page_offset += truesize;
2603
2604         if (desc_cb->page_offset + truesize <= hns3_page_size(ring)) {
2605                 desc_cb->reuse_flag = 1;
2606                 /* Bump ref count on page before it is given */
2607                 get_page(desc_cb->priv);
2608         } else if (page_count(desc_cb->priv) == 1) {
2609                 desc_cb->reuse_flag = 1;
2610                 desc_cb->page_offset = 0;
2611                 get_page(desc_cb->priv);
2612         }
2613 }
2614
2615 static int hns3_gro_complete(struct sk_buff *skb, u32 l234info)
2616 {
2617         __be16 type = skb->protocol;
2618         struct tcphdr *th;
2619         int depth = 0;
2620
2621         while (eth_type_vlan(type)) {
2622                 struct vlan_hdr *vh;
2623
2624                 if ((depth + VLAN_HLEN) > skb_headlen(skb))
2625                         return -EFAULT;
2626
2627                 vh = (struct vlan_hdr *)(skb->data + depth);
2628                 type = vh->h_vlan_encapsulated_proto;
2629                 depth += VLAN_HLEN;
2630         }
2631
2632         skb_set_network_header(skb, depth);
2633
2634         if (type == htons(ETH_P_IP)) {
2635                 const struct iphdr *iph = ip_hdr(skb);
2636
2637                 depth += sizeof(struct iphdr);
2638                 skb_set_transport_header(skb, depth);
2639                 th = tcp_hdr(skb);
2640                 th->check = ~tcp_v4_check(skb->len - depth, iph->saddr,
2641                                           iph->daddr, 0);
2642         } else if (type == htons(ETH_P_IPV6)) {
2643                 const struct ipv6hdr *iph = ipv6_hdr(skb);
2644
2645                 depth += sizeof(struct ipv6hdr);
2646                 skb_set_transport_header(skb, depth);
2647                 th = tcp_hdr(skb);
2648                 th->check = ~tcp_v6_check(skb->len - depth, &iph->saddr,
2649                                           &iph->daddr, 0);
2650         } else {
2651                 hns3_rl_err(skb->dev,
2652                             "Error: FW GRO supports only IPv4/IPv6, not 0x%04x, depth: %d\n",
2653                             be16_to_cpu(type), depth);
2654                 return -EFAULT;
2655         }
2656
2657         skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
2658         if (th->cwr)
2659                 skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
2660
2661         if (l234info & BIT(HNS3_RXD_GRO_FIXID_B))
2662                 skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_FIXEDID;
2663
2664         skb->csum_start = (unsigned char *)th - skb->head;
2665         skb->csum_offset = offsetof(struct tcphdr, check);
2666         skb->ip_summed = CHECKSUM_PARTIAL;
2667         return 0;
2668 }
2669
2670 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2671                              u32 l234info, u32 bd_base_info, u32 ol_info)
2672 {
2673         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2674         int l3_type, l4_type;
2675         int ol4_type;
2676
2677         skb->ip_summed = CHECKSUM_NONE;
2678
2679         skb_checksum_none_assert(skb);
2680
2681         if (!(netdev->features & NETIF_F_RXCSUM))
2682                 return;
2683
2684         /* check if hardware has done checksum */
2685         if (!(bd_base_info & BIT(HNS3_RXD_L3L4P_B)))
2686                 return;
2687
2688         if (unlikely(l234info & (BIT(HNS3_RXD_L3E_B) | BIT(HNS3_RXD_L4E_B) |
2689                                  BIT(HNS3_RXD_OL3E_B) |
2690                                  BIT(HNS3_RXD_OL4E_B)))) {
2691                 u64_stats_update_begin(&ring->syncp);
2692                 ring->stats.l3l4_csum_err++;
2693                 u64_stats_update_end(&ring->syncp);
2694
2695                 return;
2696         }
2697
2698         ol4_type = hnae3_get_field(ol_info, HNS3_RXD_OL4ID_M,
2699                                    HNS3_RXD_OL4ID_S);
2700         switch (ol4_type) {
2701         case HNS3_OL4_TYPE_MAC_IN_UDP:
2702         case HNS3_OL4_TYPE_NVGRE:
2703                 skb->csum_level = 1;
2704                 /* fall through */
2705         case HNS3_OL4_TYPE_NO_TUN:
2706                 l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2707                                           HNS3_RXD_L3ID_S);
2708                 l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2709                                           HNS3_RXD_L4ID_S);
2710
2711                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2712                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2713                      l3_type == HNS3_L3_TYPE_IPV6) &&
2714                     (l4_type == HNS3_L4_TYPE_UDP ||
2715                      l4_type == HNS3_L4_TYPE_TCP ||
2716                      l4_type == HNS3_L4_TYPE_SCTP))
2717                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2718                 break;
2719         default:
2720                 break;
2721         }
2722 }
2723
2724 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2725 {
2726         if (skb_has_frag_list(skb))
2727                 napi_gro_flush(&ring->tqp_vector->napi, false);
2728
2729         napi_gro_receive(&ring->tqp_vector->napi, skb);
2730 }
2731
2732 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2733                                 struct hns3_desc *desc, u32 l234info,
2734                                 u16 *vlan_tag)
2735 {
2736         struct hnae3_handle *handle = ring->tqp->handle;
2737         struct pci_dev *pdev = ring->tqp->handle->pdev;
2738
2739         if (pdev->revision == 0x20) {
2740                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2741                 if (!(*vlan_tag & VLAN_VID_MASK))
2742                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2743
2744                 return (*vlan_tag != 0);
2745         }
2746
2747 #define HNS3_STRP_OUTER_VLAN    0x1
2748 #define HNS3_STRP_INNER_VLAN    0x2
2749 #define HNS3_STRP_BOTH          0x3
2750
2751         /* Hardware always insert VLAN tag into RX descriptor when
2752          * remove the tag from packet, driver needs to determine
2753          * reporting which tag to stack.
2754          */
2755         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2756                                 HNS3_RXD_STRP_TAGP_S)) {
2757         case HNS3_STRP_OUTER_VLAN:
2758                 if (handle->port_base_vlan_state !=
2759                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2760                         return false;
2761
2762                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2763                 return true;
2764         case HNS3_STRP_INNER_VLAN:
2765                 if (handle->port_base_vlan_state !=
2766                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2767                         return false;
2768
2769                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2770                 return true;
2771         case HNS3_STRP_BOTH:
2772                 if (handle->port_base_vlan_state ==
2773                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2774                         *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2775                 else
2776                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2777
2778                 return true;
2779         default:
2780                 return false;
2781         }
2782 }
2783
2784 static int hns3_alloc_skb(struct hns3_enet_ring *ring, unsigned int length,
2785                           unsigned char *va)
2786 {
2787 #define HNS3_NEED_ADD_FRAG      1
2788         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2789         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2790         struct sk_buff *skb;
2791
2792         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2793         skb = ring->skb;
2794         if (unlikely(!skb)) {
2795                 hns3_rl_err(netdev, "alloc rx skb fail\n");
2796
2797                 u64_stats_update_begin(&ring->syncp);
2798                 ring->stats.sw_err_cnt++;
2799                 u64_stats_update_end(&ring->syncp);
2800
2801                 return -ENOMEM;
2802         }
2803
2804         prefetchw(skb->data);
2805
2806         ring->pending_buf = 1;
2807         ring->frag_num = 0;
2808         ring->tail_skb = NULL;
2809         if (length <= HNS3_RX_HEAD_SIZE) {
2810                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2811
2812                 /* We can reuse buffer as-is, just make sure it is local */
2813                 if (likely(page_to_nid(desc_cb->priv) == numa_mem_id()))
2814                         desc_cb->reuse_flag = 1;
2815                 else /* This page cannot be reused so discard it */
2816                         put_page(desc_cb->priv);
2817
2818                 ring_ptr_move_fw(ring, next_to_clean);
2819                 return 0;
2820         }
2821         u64_stats_update_begin(&ring->syncp);
2822         ring->stats.seg_pkt_cnt++;
2823         u64_stats_update_end(&ring->syncp);
2824
2825         ring->pull_len = eth_get_headlen(netdev, va, HNS3_RX_HEAD_SIZE);
2826         __skb_put(skb, ring->pull_len);
2827         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2828                             desc_cb);
2829         ring_ptr_move_fw(ring, next_to_clean);
2830
2831         return HNS3_NEED_ADD_FRAG;
2832 }
2833
2834 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2835                          struct sk_buff **out_skb, bool pending)
2836 {
2837         struct sk_buff *skb = *out_skb;
2838         struct sk_buff *head_skb = *out_skb;
2839         struct sk_buff *new_skb;
2840         struct hns3_desc_cb *desc_cb;
2841         struct hns3_desc *pre_desc;
2842         u32 bd_base_info;
2843         int pre_bd;
2844
2845         /* if there is pending bd, the SW param next_to_clean has moved
2846          * to next and the next is NULL
2847          */
2848         if (pending) {
2849                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2850                          ring->desc_num;
2851                 pre_desc = &ring->desc[pre_bd];
2852                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2853         } else {
2854                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2855         }
2856
2857         while (!(bd_base_info & BIT(HNS3_RXD_FE_B))) {
2858                 desc = &ring->desc[ring->next_to_clean];
2859                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2860                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2861                 /* make sure HW write desc complete */
2862                 dma_rmb();
2863                 if (!(bd_base_info & BIT(HNS3_RXD_VLD_B)))
2864                         return -ENXIO;
2865
2866                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2867                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2868                                                  HNS3_RX_HEAD_SIZE);
2869                         if (unlikely(!new_skb)) {
2870                                 hns3_rl_err(ring->tqp_vector->napi.dev,
2871                                             "alloc rx fraglist skb fail\n");
2872                                 return -ENXIO;
2873                         }
2874                         ring->frag_num = 0;
2875
2876                         if (ring->tail_skb) {
2877                                 ring->tail_skb->next = new_skb;
2878                                 ring->tail_skb = new_skb;
2879                         } else {
2880                                 skb_shinfo(skb)->frag_list = new_skb;
2881                                 ring->tail_skb = new_skb;
2882                         }
2883                 }
2884
2885                 if (ring->tail_skb) {
2886                         head_skb->truesize += hns3_buf_size(ring);
2887                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2888                         head_skb->len += le16_to_cpu(desc->rx.size);
2889                         skb = ring->tail_skb;
2890                 }
2891
2892                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2893                 ring_ptr_move_fw(ring, next_to_clean);
2894                 ring->pending_buf++;
2895         }
2896
2897         return 0;
2898 }
2899
2900 static int hns3_set_gro_and_checksum(struct hns3_enet_ring *ring,
2901                                      struct sk_buff *skb, u32 l234info,
2902                                      u32 bd_base_info, u32 ol_info)
2903 {
2904         u32 l3_type;
2905
2906         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2907                                                     HNS3_RXD_GRO_SIZE_M,
2908                                                     HNS3_RXD_GRO_SIZE_S);
2909         /* if there is no HW GRO, do not set gro params */
2910         if (!skb_shinfo(skb)->gso_size) {
2911                 hns3_rx_checksum(ring, skb, l234info, bd_base_info, ol_info);
2912                 return 0;
2913         }
2914
2915         NAPI_GRO_CB(skb)->count = hnae3_get_field(l234info,
2916                                                   HNS3_RXD_GRO_COUNT_M,
2917                                                   HNS3_RXD_GRO_COUNT_S);
2918
2919         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S);
2920         if (l3_type == HNS3_L3_TYPE_IPV4)
2921                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2922         else if (l3_type == HNS3_L3_TYPE_IPV6)
2923                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2924         else
2925                 return -EFAULT;
2926
2927         return  hns3_gro_complete(skb, l234info);
2928 }
2929
2930 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2931                                      struct sk_buff *skb, u32 rss_hash)
2932 {
2933         struct hnae3_handle *handle = ring->tqp->handle;
2934         enum pkt_hash_types rss_type;
2935
2936         if (rss_hash)
2937                 rss_type = handle->kinfo.rss_type;
2938         else
2939                 rss_type = PKT_HASH_TYPE_NONE;
2940
2941         skb_set_hash(skb, rss_hash, rss_type);
2942 }
2943
2944 static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
2945 {
2946         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2947         enum hns3_pkt_l2t_type l2_frame_type;
2948         u32 bd_base_info, l234info, ol_info;
2949         struct hns3_desc *desc;
2950         unsigned int len;
2951         int pre_ntc, ret;
2952
2953         /* bdinfo handled below is only valid on the last BD of the
2954          * current packet, and ring->next_to_clean indicates the first
2955          * descriptor of next packet, so need - 1 below.
2956          */
2957         pre_ntc = ring->next_to_clean ? (ring->next_to_clean - 1) :
2958                                         (ring->desc_num - 1);
2959         desc = &ring->desc[pre_ntc];
2960         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2961         l234info = le32_to_cpu(desc->rx.l234_info);
2962         ol_info = le32_to_cpu(desc->rx.ol_info);
2963
2964         /* Based on hw strategy, the tag offloaded will be stored at
2965          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2966          * in one layer tag case.
2967          */
2968         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2969                 u16 vlan_tag;
2970
2971                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2972                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
2973                                                vlan_tag);
2974         }
2975
2976         if (unlikely(!desc->rx.pkt_len || (l234info & (BIT(HNS3_RXD_TRUNCAT_B) |
2977                                   BIT(HNS3_RXD_L2E_B))))) {
2978                 u64_stats_update_begin(&ring->syncp);
2979                 if (l234info & BIT(HNS3_RXD_L2E_B))
2980                         ring->stats.l2_err++;
2981                 else
2982                         ring->stats.err_pkt_len++;
2983                 u64_stats_update_end(&ring->syncp);
2984
2985                 return -EFAULT;
2986         }
2987
2988         len = skb->len;
2989
2990         /* Do update ip stack process */
2991         skb->protocol = eth_type_trans(skb, netdev);
2992
2993         /* This is needed in order to enable forwarding support */
2994         ret = hns3_set_gro_and_checksum(ring, skb, l234info,
2995                                         bd_base_info, ol_info);
2996         if (unlikely(ret)) {
2997                 u64_stats_update_begin(&ring->syncp);
2998                 ring->stats.rx_err_cnt++;
2999                 u64_stats_update_end(&ring->syncp);
3000                 return ret;
3001         }
3002
3003         l2_frame_type = hnae3_get_field(l234info, HNS3_RXD_DMAC_M,
3004                                         HNS3_RXD_DMAC_S);
3005
3006         u64_stats_update_begin(&ring->syncp);
3007         ring->stats.rx_pkts++;
3008         ring->stats.rx_bytes += len;
3009
3010         if (l2_frame_type == HNS3_L2_TYPE_MULTICAST)
3011                 ring->stats.rx_multicast++;
3012
3013         u64_stats_update_end(&ring->syncp);
3014
3015         ring->tqp_vector->rx_group.total_bytes += len;
3016
3017         hns3_set_rx_skb_rss_type(ring, skb, le32_to_cpu(desc->rx.rss_hash));
3018         return 0;
3019 }
3020
3021 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
3022                              struct sk_buff **out_skb)
3023 {
3024         struct sk_buff *skb = ring->skb;
3025         struct hns3_desc_cb *desc_cb;
3026         struct hns3_desc *desc;
3027         unsigned int length;
3028         u32 bd_base_info;
3029         int ret;
3030
3031         desc = &ring->desc[ring->next_to_clean];
3032         desc_cb = &ring->desc_cb[ring->next_to_clean];
3033
3034         prefetch(desc);
3035
3036         length = le16_to_cpu(desc->rx.size);
3037         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
3038
3039         /* Check valid BD */
3040         if (unlikely(!(bd_base_info & BIT(HNS3_RXD_VLD_B))))
3041                 return -ENXIO;
3042
3043         if (!skb)
3044                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
3045
3046         /* Prefetch first cache line of first page
3047          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
3048          * line size is 64B so need to prefetch twice to make it 128B. But in
3049          * actual we can have greater size of caches with 128B Level 1 cache
3050          * lines. In such a case, single fetch would suffice to cache in the
3051          * relevant part of the header.
3052          */
3053         prefetch(ring->va);
3054 #if L1_CACHE_BYTES < 128
3055         prefetch(ring->va + L1_CACHE_BYTES);
3056 #endif
3057
3058         if (!skb) {
3059                 ret = hns3_alloc_skb(ring, length, ring->va);
3060                 *out_skb = skb = ring->skb;
3061
3062                 if (ret < 0) /* alloc buffer fail */
3063                         return ret;
3064                 if (ret > 0) { /* need add frag */
3065                         ret = hns3_add_frag(ring, desc, &skb, false);
3066                         if (ret)
3067                                 return ret;
3068
3069                         /* As the head data may be changed when GRO enable, copy
3070                          * the head data in after other data rx completed
3071                          */
3072                         memcpy(skb->data, ring->va,
3073                                ALIGN(ring->pull_len, sizeof(long)));
3074                 }
3075         } else {
3076                 ret = hns3_add_frag(ring, desc, &skb, true);
3077                 if (ret)
3078                         return ret;
3079
3080                 /* As the head data may be changed when GRO enable, copy
3081                  * the head data in after other data rx completed
3082                  */
3083                 memcpy(skb->data, ring->va,
3084                        ALIGN(ring->pull_len, sizeof(long)));
3085         }
3086
3087         ret = hns3_handle_bdinfo(ring, skb);
3088         if (unlikely(ret)) {
3089                 dev_kfree_skb_any(skb);
3090                 return ret;
3091         }
3092
3093         skb_record_rx_queue(skb, ring->tqp->tqp_index);
3094         *out_skb = skb;
3095
3096         return 0;
3097 }
3098
3099 int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
3100                        void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
3101 {
3102 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
3103         int unused_count = hns3_desc_unused(ring);
3104         struct sk_buff *skb = ring->skb;
3105         int recv_pkts = 0;
3106         int recv_bds = 0;
3107         int err, num;
3108
3109         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
3110         rmb(); /* Make sure num taken effect before the other data is touched */
3111
3112         num -= unused_count;
3113         unused_count -= ring->pending_buf;
3114
3115         while (recv_pkts < budget && recv_bds < num) {
3116                 /* Reuse or realloc buffers */
3117                 if (unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
3118                         hns3_nic_alloc_rx_buffers(ring, unused_count);
3119                         unused_count = hns3_desc_unused(ring) -
3120                                         ring->pending_buf;
3121                 }
3122
3123                 /* Poll one pkt */
3124                 err = hns3_handle_rx_bd(ring, &skb);
3125                 if (unlikely(!skb)) /* This fault cannot be repaired */
3126                         goto out;
3127
3128                 if (err == -ENXIO) { /* Do not get FE for the packet */
3129                         goto out;
3130                 } else if (unlikely(err)) {  /* Do jump the err */
3131                         recv_bds += ring->pending_buf;
3132                         unused_count += ring->pending_buf;
3133                         ring->skb = NULL;
3134                         ring->pending_buf = 0;
3135                         continue;
3136                 }
3137
3138                 rx_fn(ring, skb);
3139                 recv_bds += ring->pending_buf;
3140                 unused_count += ring->pending_buf;
3141                 ring->skb = NULL;
3142                 ring->pending_buf = 0;
3143
3144                 recv_pkts++;
3145         }
3146
3147 out:
3148         /* Make all data has been write before submit */
3149         if (unused_count > 0)
3150                 hns3_nic_alloc_rx_buffers(ring, unused_count);
3151
3152         return recv_pkts;
3153 }
3154
3155 static bool hns3_get_new_flow_lvl(struct hns3_enet_ring_group *ring_group)
3156 {
3157 #define HNS3_RX_LOW_BYTE_RATE 10000
3158 #define HNS3_RX_MID_BYTE_RATE 20000
3159 #define HNS3_RX_ULTRA_PACKET_RATE 40
3160
3161         enum hns3_flow_level_range new_flow_level;
3162         struct hns3_enet_tqp_vector *tqp_vector;
3163         int packets_per_msecs, bytes_per_msecs;
3164         u32 time_passed_ms;
3165
3166         tqp_vector = ring_group->ring->tqp_vector;
3167         time_passed_ms =
3168                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
3169         if (!time_passed_ms)
3170                 return false;
3171
3172         do_div(ring_group->total_packets, time_passed_ms);
3173         packets_per_msecs = ring_group->total_packets;
3174
3175         do_div(ring_group->total_bytes, time_passed_ms);
3176         bytes_per_msecs = ring_group->total_bytes;
3177
3178         new_flow_level = ring_group->coal.flow_level;
3179
3180         /* Simple throttlerate management
3181          * 0-10MB/s   lower     (50000 ints/s)
3182          * 10-20MB/s   middle    (20000 ints/s)
3183          * 20-1249MB/s high      (18000 ints/s)
3184          * > 40000pps  ultra     (8000 ints/s)
3185          */
3186         switch (new_flow_level) {
3187         case HNS3_FLOW_LOW:
3188                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
3189                         new_flow_level = HNS3_FLOW_MID;
3190                 break;
3191         case HNS3_FLOW_MID:
3192                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
3193                         new_flow_level = HNS3_FLOW_HIGH;
3194                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
3195                         new_flow_level = HNS3_FLOW_LOW;
3196                 break;
3197         case HNS3_FLOW_HIGH:
3198         case HNS3_FLOW_ULTRA:
3199         default:
3200                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
3201                         new_flow_level = HNS3_FLOW_MID;
3202                 break;
3203         }
3204
3205         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
3206             &tqp_vector->rx_group == ring_group)
3207                 new_flow_level = HNS3_FLOW_ULTRA;
3208
3209         ring_group->total_bytes = 0;
3210         ring_group->total_packets = 0;
3211         ring_group->coal.flow_level = new_flow_level;
3212
3213         return true;
3214 }
3215
3216 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
3217 {
3218         struct hns3_enet_tqp_vector *tqp_vector;
3219         u16 new_int_gl;
3220
3221         if (!ring_group->ring)
3222                 return false;
3223
3224         tqp_vector = ring_group->ring->tqp_vector;
3225         if (!tqp_vector->last_jiffies)
3226                 return false;
3227
3228         if (ring_group->total_packets == 0) {
3229                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
3230                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
3231                 return true;
3232         }
3233
3234         if (!hns3_get_new_flow_lvl(ring_group))
3235                 return false;
3236
3237         new_int_gl = ring_group->coal.int_gl;
3238         switch (ring_group->coal.flow_level) {
3239         case HNS3_FLOW_LOW:
3240                 new_int_gl = HNS3_INT_GL_50K;
3241                 break;
3242         case HNS3_FLOW_MID:
3243                 new_int_gl = HNS3_INT_GL_20K;
3244                 break;
3245         case HNS3_FLOW_HIGH:
3246                 new_int_gl = HNS3_INT_GL_18K;
3247                 break;
3248         case HNS3_FLOW_ULTRA:
3249                 new_int_gl = HNS3_INT_GL_8K;
3250                 break;
3251         default:
3252                 break;
3253         }
3254
3255         if (new_int_gl != ring_group->coal.int_gl) {
3256                 ring_group->coal.int_gl = new_int_gl;
3257                 return true;
3258         }
3259         return false;
3260 }
3261
3262 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
3263 {
3264         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
3265         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
3266         bool rx_update, tx_update;
3267
3268         /* update param every 1000ms */
3269         if (time_before(jiffies,
3270                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
3271                 return;
3272
3273         if (rx_group->coal.gl_adapt_enable) {
3274                 rx_update = hns3_get_new_int_gl(rx_group);
3275                 if (rx_update)
3276                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
3277                                                        rx_group->coal.int_gl);
3278         }
3279
3280         if (tx_group->coal.gl_adapt_enable) {
3281                 tx_update = hns3_get_new_int_gl(tx_group);
3282                 if (tx_update)
3283                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
3284                                                        tx_group->coal.int_gl);
3285         }
3286
3287         tqp_vector->last_jiffies = jiffies;
3288 }
3289
3290 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
3291 {
3292         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
3293         struct hns3_enet_ring *ring;
3294         int rx_pkt_total = 0;
3295
3296         struct hns3_enet_tqp_vector *tqp_vector =
3297                 container_of(napi, struct hns3_enet_tqp_vector, napi);
3298         bool clean_complete = true;
3299         int rx_budget = budget;
3300
3301         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
3302                 napi_complete(napi);
3303                 return 0;
3304         }
3305
3306         /* Since the actual Tx work is minimal, we can give the Tx a larger
3307          * budget and be more aggressive about cleaning up the Tx descriptors.
3308          */
3309         hns3_for_each_ring(ring, tqp_vector->tx_group)
3310                 hns3_clean_tx_ring(ring);
3311
3312         /* make sure rx ring budget not smaller than 1 */
3313         if (tqp_vector->num_tqps > 1)
3314                 rx_budget = max(budget / tqp_vector->num_tqps, 1);
3315
3316         hns3_for_each_ring(ring, tqp_vector->rx_group) {
3317                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
3318                                                     hns3_rx_skb);
3319
3320                 if (rx_cleaned >= rx_budget)
3321                         clean_complete = false;
3322
3323                 rx_pkt_total += rx_cleaned;
3324         }
3325
3326         tqp_vector->rx_group.total_packets += rx_pkt_total;
3327
3328         if (!clean_complete)
3329                 return budget;
3330
3331         if (napi_complete(napi) &&
3332             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
3333                 hns3_update_new_int_gl(tqp_vector);
3334                 hns3_mask_vector_irq(tqp_vector, 1);
3335         }
3336
3337         return rx_pkt_total;
3338 }
3339
3340 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3341                                       struct hnae3_ring_chain_node *head)
3342 {
3343         struct pci_dev *pdev = tqp_vector->handle->pdev;
3344         struct hnae3_ring_chain_node *cur_chain = head;
3345         struct hnae3_ring_chain_node *chain;
3346         struct hns3_enet_ring *tx_ring;
3347         struct hns3_enet_ring *rx_ring;
3348
3349         tx_ring = tqp_vector->tx_group.ring;
3350         if (tx_ring) {
3351                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
3352                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3353                               HNAE3_RING_TYPE_TX);
3354                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3355                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
3356
3357                 cur_chain->next = NULL;
3358
3359                 while (tx_ring->next) {
3360                         tx_ring = tx_ring->next;
3361
3362                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
3363                                              GFP_KERNEL);
3364                         if (!chain)
3365                                 goto err_free_chain;
3366
3367                         cur_chain->next = chain;
3368                         chain->tqp_index = tx_ring->tqp->tqp_index;
3369                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3370                                       HNAE3_RING_TYPE_TX);
3371                         hnae3_set_field(chain->int_gl_idx,
3372                                         HNAE3_RING_GL_IDX_M,
3373                                         HNAE3_RING_GL_IDX_S,
3374                                         HNAE3_RING_GL_TX);
3375
3376                         cur_chain = chain;
3377                 }
3378         }
3379
3380         rx_ring = tqp_vector->rx_group.ring;
3381         if (!tx_ring && rx_ring) {
3382                 cur_chain->next = NULL;
3383                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
3384                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3385                               HNAE3_RING_TYPE_RX);
3386                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3387                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3388
3389                 rx_ring = rx_ring->next;
3390         }
3391
3392         while (rx_ring) {
3393                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
3394                 if (!chain)
3395                         goto err_free_chain;
3396
3397                 cur_chain->next = chain;
3398                 chain->tqp_index = rx_ring->tqp->tqp_index;
3399                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3400                               HNAE3_RING_TYPE_RX);
3401                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3402                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3403
3404                 cur_chain = chain;
3405
3406                 rx_ring = rx_ring->next;
3407         }
3408
3409         return 0;
3410
3411 err_free_chain:
3412         cur_chain = head->next;
3413         while (cur_chain) {
3414                 chain = cur_chain->next;
3415                 devm_kfree(&pdev->dev, cur_chain);
3416                 cur_chain = chain;
3417         }
3418         head->next = NULL;
3419
3420         return -ENOMEM;
3421 }
3422
3423 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3424                                         struct hnae3_ring_chain_node *head)
3425 {
3426         struct pci_dev *pdev = tqp_vector->handle->pdev;
3427         struct hnae3_ring_chain_node *chain_tmp, *chain;
3428
3429         chain = head->next;
3430
3431         while (chain) {
3432                 chain_tmp = chain->next;
3433                 devm_kfree(&pdev->dev, chain);
3434                 chain = chain_tmp;
3435         }
3436 }
3437
3438 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3439                                    struct hns3_enet_ring *ring)
3440 {
3441         ring->next = group->ring;
3442         group->ring = ring;
3443
3444         group->count++;
3445 }
3446
3447 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3448 {
3449         struct pci_dev *pdev = priv->ae_handle->pdev;
3450         struct hns3_enet_tqp_vector *tqp_vector;
3451         int num_vectors = priv->vector_num;
3452         int numa_node;
3453         int vector_i;
3454
3455         numa_node = dev_to_node(&pdev->dev);
3456
3457         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3458                 tqp_vector = &priv->tqp_vector[vector_i];
3459                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3460                                 &tqp_vector->affinity_mask);
3461         }
3462 }
3463
3464 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3465 {
3466         struct hnae3_ring_chain_node vector_ring_chain;
3467         struct hnae3_handle *h = priv->ae_handle;
3468         struct hns3_enet_tqp_vector *tqp_vector;
3469         int ret = 0;
3470         int i;
3471
3472         hns3_nic_set_cpumask(priv);
3473
3474         for (i = 0; i < priv->vector_num; i++) {
3475                 tqp_vector = &priv->tqp_vector[i];
3476                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3477                 tqp_vector->num_tqps = 0;
3478         }
3479
3480         for (i = 0; i < h->kinfo.num_tqps; i++) {
3481                 u16 vector_i = i % priv->vector_num;
3482                 u16 tqp_num = h->kinfo.num_tqps;
3483
3484                 tqp_vector = &priv->tqp_vector[vector_i];
3485
3486                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3487                                        priv->ring_data[i].ring);
3488
3489                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3490                                        priv->ring_data[i + tqp_num].ring);
3491
3492                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3493                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3494                 tqp_vector->num_tqps++;
3495         }
3496
3497         for (i = 0; i < priv->vector_num; i++) {
3498                 tqp_vector = &priv->tqp_vector[i];
3499
3500                 tqp_vector->rx_group.total_bytes = 0;
3501                 tqp_vector->rx_group.total_packets = 0;
3502                 tqp_vector->tx_group.total_bytes = 0;
3503                 tqp_vector->tx_group.total_packets = 0;
3504                 tqp_vector->handle = h;
3505
3506                 ret = hns3_get_vector_ring_chain(tqp_vector,
3507                                                  &vector_ring_chain);
3508                 if (ret)
3509                         goto map_ring_fail;
3510
3511                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3512                         tqp_vector->vector_irq, &vector_ring_chain);
3513
3514                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3515
3516                 if (ret)
3517                         goto map_ring_fail;
3518
3519                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3520                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3521         }
3522
3523         return 0;
3524
3525 map_ring_fail:
3526         while (i--)
3527                 netif_napi_del(&priv->tqp_vector[i].napi);
3528
3529         return ret;
3530 }
3531
3532 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3533 {
3534 #define HNS3_VECTOR_PF_MAX_NUM          64
3535
3536         struct hnae3_handle *h = priv->ae_handle;
3537         struct hns3_enet_tqp_vector *tqp_vector;
3538         struct hnae3_vector_info *vector;
3539         struct pci_dev *pdev = h->pdev;
3540         u16 tqp_num = h->kinfo.num_tqps;
3541         u16 vector_num;
3542         int ret = 0;
3543         u16 i;
3544
3545         /* RSS size, cpu online and vector_num should be the same */
3546         /* Should consider 2p/4p later */
3547         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3548         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3549
3550         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3551                               GFP_KERNEL);
3552         if (!vector)
3553                 return -ENOMEM;
3554
3555         /* save the actual available vector number */
3556         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3557
3558         priv->vector_num = vector_num;
3559         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3560                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3561                              GFP_KERNEL);
3562         if (!priv->tqp_vector) {
3563                 ret = -ENOMEM;
3564                 goto out;
3565         }
3566
3567         for (i = 0; i < priv->vector_num; i++) {
3568                 tqp_vector = &priv->tqp_vector[i];
3569                 tqp_vector->idx = i;
3570                 tqp_vector->mask_addr = vector[i].io_addr;
3571                 tqp_vector->vector_irq = vector[i].vector;
3572                 hns3_vector_gl_rl_init(tqp_vector, priv);
3573         }
3574
3575 out:
3576         devm_kfree(&pdev->dev, vector);
3577         return ret;
3578 }
3579
3580 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3581 {
3582         group->ring = NULL;
3583         group->count = 0;
3584 }
3585
3586 static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3587 {
3588         struct hnae3_ring_chain_node vector_ring_chain;
3589         struct hnae3_handle *h = priv->ae_handle;
3590         struct hns3_enet_tqp_vector *tqp_vector;
3591         int i;
3592
3593         for (i = 0; i < priv->vector_num; i++) {
3594                 tqp_vector = &priv->tqp_vector[i];
3595
3596                 if (!tqp_vector->rx_group.ring && !tqp_vector->tx_group.ring)
3597                         continue;
3598
3599                 hns3_get_vector_ring_chain(tqp_vector, &vector_ring_chain);
3600
3601                 h->ae_algo->ops->unmap_ring_from_vector(h,
3602                         tqp_vector->vector_irq, &vector_ring_chain);
3603
3604                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3605
3606                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3607                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3608                         free_irq(tqp_vector->vector_irq, tqp_vector);
3609                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3610                 }
3611
3612                 hns3_clear_ring_group(&tqp_vector->rx_group);
3613                 hns3_clear_ring_group(&tqp_vector->tx_group);
3614                 netif_napi_del(&priv->tqp_vector[i].napi);
3615         }
3616 }
3617
3618 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3619 {
3620         struct hnae3_handle *h = priv->ae_handle;
3621         struct pci_dev *pdev = h->pdev;
3622         int i, ret;
3623
3624         for (i = 0; i < priv->vector_num; i++) {
3625                 struct hns3_enet_tqp_vector *tqp_vector;
3626
3627                 tqp_vector = &priv->tqp_vector[i];
3628                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3629                 if (ret)
3630                         return ret;
3631         }
3632
3633         devm_kfree(&pdev->dev, priv->tqp_vector);
3634         return 0;
3635 }
3636
3637 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3638                              unsigned int ring_type)
3639 {
3640         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3641         int queue_num = priv->ae_handle->kinfo.num_tqps;
3642         struct pci_dev *pdev = priv->ae_handle->pdev;
3643         struct hns3_enet_ring *ring;
3644         int desc_num;
3645
3646         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3647         if (!ring)
3648                 return -ENOMEM;
3649
3650         if (ring_type == HNAE3_RING_TYPE_TX) {
3651                 desc_num = priv->ae_handle->kinfo.num_tx_desc;
3652                 ring_data[q->tqp_index].ring = ring;
3653                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3654                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3655         } else {
3656                 desc_num = priv->ae_handle->kinfo.num_rx_desc;
3657                 ring_data[q->tqp_index + queue_num].ring = ring;
3658                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3659                 ring->io_base = q->io_base;
3660         }
3661
3662         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3663
3664         ring->tqp = q;
3665         ring->desc = NULL;
3666         ring->desc_cb = NULL;
3667         ring->dev = priv->dev;
3668         ring->desc_dma_addr = 0;
3669         ring->buf_size = q->buf_size;
3670         ring->desc_num = desc_num;
3671         ring->next_to_use = 0;
3672         ring->next_to_clean = 0;
3673
3674         return 0;
3675 }
3676
3677 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3678                               struct hns3_nic_priv *priv)
3679 {
3680         int ret;
3681
3682         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3683         if (ret)
3684                 return ret;
3685
3686         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3687         if (ret) {
3688                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3689                 return ret;
3690         }
3691
3692         return 0;
3693 }
3694
3695 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3696 {
3697         struct hnae3_handle *h = priv->ae_handle;
3698         struct pci_dev *pdev = h->pdev;
3699         int i, ret;
3700
3701         priv->ring_data =  devm_kzalloc(&pdev->dev,
3702                                         array3_size(h->kinfo.num_tqps,
3703                                                     sizeof(*priv->ring_data),
3704                                                     2),
3705                                         GFP_KERNEL);
3706         if (!priv->ring_data)
3707                 return -ENOMEM;
3708
3709         for (i = 0; i < h->kinfo.num_tqps; i++) {
3710                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3711                 if (ret)
3712                         goto err;
3713         }
3714
3715         return 0;
3716 err:
3717         while (i--) {
3718                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3719                 devm_kfree(priv->dev,
3720                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3721         }
3722
3723         devm_kfree(&pdev->dev, priv->ring_data);
3724         priv->ring_data = NULL;
3725         return ret;
3726 }
3727
3728 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3729 {
3730         struct hnae3_handle *h = priv->ae_handle;
3731         int i;
3732
3733         if (!priv->ring_data)
3734                 return;
3735
3736         for (i = 0; i < h->kinfo.num_tqps; i++) {
3737                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3738                 devm_kfree(priv->dev,
3739                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3740         }
3741         devm_kfree(priv->dev, priv->ring_data);
3742         priv->ring_data = NULL;
3743 }
3744
3745 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3746 {
3747         int ret;
3748
3749         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3750                 return -EINVAL;
3751
3752         ring->desc_cb = devm_kcalloc(ring_to_dev(ring), ring->desc_num,
3753                                      sizeof(ring->desc_cb[0]), GFP_KERNEL);
3754         if (!ring->desc_cb) {
3755                 ret = -ENOMEM;
3756                 goto out;
3757         }
3758
3759         ret = hns3_alloc_desc(ring);
3760         if (ret)
3761                 goto out_with_desc_cb;
3762
3763         if (!HNAE3_IS_TX_RING(ring)) {
3764                 ret = hns3_alloc_ring_buffers(ring);
3765                 if (ret)
3766                         goto out_with_desc;
3767         }
3768
3769         return 0;
3770
3771 out_with_desc:
3772         hns3_free_desc(ring);
3773 out_with_desc_cb:
3774         devm_kfree(ring_to_dev(ring), ring->desc_cb);
3775         ring->desc_cb = NULL;
3776 out:
3777         return ret;
3778 }
3779
3780 void hns3_fini_ring(struct hns3_enet_ring *ring)
3781 {
3782         hns3_free_desc(ring);
3783         devm_kfree(ring_to_dev(ring), ring->desc_cb);
3784         ring->desc_cb = NULL;
3785         ring->next_to_clean = 0;
3786         ring->next_to_use = 0;
3787         ring->pending_buf = 0;
3788         if (ring->skb) {
3789                 dev_kfree_skb_any(ring->skb);
3790                 ring->skb = NULL;
3791         }
3792 }
3793
3794 static int hns3_buf_size2type(u32 buf_size)
3795 {
3796         int bd_size_type;
3797
3798         switch (buf_size) {
3799         case 512:
3800                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3801                 break;
3802         case 1024:
3803                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3804                 break;
3805         case 2048:
3806                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3807                 break;
3808         case 4096:
3809                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3810                 break;
3811         default:
3812                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3813         }
3814
3815         return bd_size_type;
3816 }
3817
3818 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3819 {
3820         dma_addr_t dma = ring->desc_dma_addr;
3821         struct hnae3_queue *q = ring->tqp;
3822
3823         if (!HNAE3_IS_TX_RING(ring)) {
3824                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG, (u32)dma);
3825                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3826                                (u32)((dma >> 31) >> 1));
3827
3828                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3829                                hns3_buf_size2type(ring->buf_size));
3830                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3831                                ring->desc_num / 8 - 1);
3832
3833         } else {
3834                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3835                                (u32)dma);
3836                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3837                                (u32)((dma >> 31) >> 1));
3838
3839                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3840                                ring->desc_num / 8 - 1);
3841         }
3842 }
3843
3844 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3845 {
3846         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3847         int i;
3848
3849         for (i = 0; i < HNAE3_MAX_TC; i++) {
3850                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3851                 int j;
3852
3853                 if (!tc_info->enable)
3854                         continue;
3855
3856                 for (j = 0; j < tc_info->tqp_count; j++) {
3857                         struct hnae3_queue *q;
3858
3859                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3860                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3861                                        tc_info->tc);
3862                 }
3863         }
3864 }
3865
3866 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3867 {
3868         struct hnae3_handle *h = priv->ae_handle;
3869         int ring_num = h->kinfo.num_tqps * 2;
3870         int i, j;
3871         int ret;
3872
3873         for (i = 0; i < ring_num; i++) {
3874                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3875                 if (ret) {
3876                         dev_err(priv->dev,
3877                                 "Alloc ring memory fail! ret=%d\n", ret);
3878                         goto out_when_alloc_ring_memory;
3879                 }
3880
3881                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3882         }
3883
3884         return 0;
3885
3886 out_when_alloc_ring_memory:
3887         for (j = i - 1; j >= 0; j--)
3888                 hns3_fini_ring(priv->ring_data[j].ring);
3889
3890         return -ENOMEM;
3891 }
3892
3893 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3894 {
3895         struct hnae3_handle *h = priv->ae_handle;
3896         int i;
3897
3898         for (i = 0; i < h->kinfo.num_tqps; i++) {
3899                 hns3_fini_ring(priv->ring_data[i].ring);
3900                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3901         }
3902         return 0;
3903 }
3904
3905 /* Set mac addr if it is configured. or leave it to the AE driver */
3906 static int hns3_init_mac_addr(struct net_device *netdev)
3907 {
3908         struct hns3_nic_priv *priv = netdev_priv(netdev);
3909         struct hnae3_handle *h = priv->ae_handle;
3910         u8 mac_addr_temp[ETH_ALEN];
3911         int ret = 0;
3912
3913         if (h->ae_algo->ops->get_mac_addr)
3914                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3915
3916         /* Check if the MAC address is valid, if not get a random one */
3917         if (!is_valid_ether_addr(mac_addr_temp)) {
3918                 eth_hw_addr_random(netdev);
3919                 dev_warn(priv->dev, "using random MAC address %pM\n",
3920                          netdev->dev_addr);
3921         } else {
3922                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3923                 ether_addr_copy(netdev->perm_addr, mac_addr_temp);
3924         }
3925
3926         if (h->ae_algo->ops->set_mac_addr)
3927                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3928
3929         return ret;
3930 }
3931
3932 static int hns3_init_phy(struct net_device *netdev)
3933 {
3934         struct hnae3_handle *h = hns3_get_handle(netdev);
3935         int ret = 0;
3936
3937         if (h->ae_algo->ops->mac_connect_phy)
3938                 ret = h->ae_algo->ops->mac_connect_phy(h);
3939
3940         return ret;
3941 }
3942
3943 static void hns3_uninit_phy(struct net_device *netdev)
3944 {
3945         struct hnae3_handle *h = hns3_get_handle(netdev);
3946
3947         if (h->ae_algo->ops->mac_disconnect_phy)
3948                 h->ae_algo->ops->mac_disconnect_phy(h);
3949 }
3950
3951 static int hns3_restore_fd_rules(struct net_device *netdev)
3952 {
3953         struct hnae3_handle *h = hns3_get_handle(netdev);
3954         int ret = 0;
3955
3956         if (h->ae_algo->ops->restore_fd_rules)
3957                 ret = h->ae_algo->ops->restore_fd_rules(h);
3958
3959         return ret;
3960 }
3961
3962 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3963 {
3964         struct hnae3_handle *h = hns3_get_handle(netdev);
3965
3966         if (h->ae_algo->ops->del_all_fd_entries)
3967                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3968 }
3969
3970 static int hns3_client_start(struct hnae3_handle *handle)
3971 {
3972         if (!handle->ae_algo->ops->client_start)
3973                 return 0;
3974
3975         return handle->ae_algo->ops->client_start(handle);
3976 }
3977
3978 static void hns3_client_stop(struct hnae3_handle *handle)
3979 {
3980         if (!handle->ae_algo->ops->client_stop)
3981                 return;
3982
3983         handle->ae_algo->ops->client_stop(handle);
3984 }
3985
3986 static void hns3_info_show(struct hns3_nic_priv *priv)
3987 {
3988         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3989
3990         dev_info(priv->dev, "MAC address: %pM\n", priv->netdev->dev_addr);
3991         dev_info(priv->dev, "Task queue pairs numbers: %d\n", kinfo->num_tqps);
3992         dev_info(priv->dev, "RSS size: %d\n", kinfo->rss_size);
3993         dev_info(priv->dev, "Allocated RSS size: %d\n", kinfo->req_rss_size);
3994         dev_info(priv->dev, "RX buffer length: %d\n", kinfo->rx_buf_len);
3995         dev_info(priv->dev, "Desc num per TX queue: %d\n", kinfo->num_tx_desc);
3996         dev_info(priv->dev, "Desc num per RX queue: %d\n", kinfo->num_rx_desc);
3997         dev_info(priv->dev, "Total number of enabled TCs: %d\n", kinfo->num_tc);
3998         dev_info(priv->dev, "Max mtu size: %d\n", priv->netdev->max_mtu);
3999 }
4000
4001 static int hns3_client_init(struct hnae3_handle *handle)
4002 {
4003         struct pci_dev *pdev = handle->pdev;
4004         u16 alloc_tqps, max_rss_size;
4005         struct hns3_nic_priv *priv;
4006         struct net_device *netdev;
4007         int ret;
4008
4009         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
4010                                                     &max_rss_size);
4011         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
4012         if (!netdev)
4013                 return -ENOMEM;
4014
4015         priv = netdev_priv(netdev);
4016         priv->dev = &pdev->dev;
4017         priv->netdev = netdev;
4018         priv->ae_handle = handle;
4019         priv->tx_timeout_count = 0;
4020         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
4021
4022         handle->msg_enable = netif_msg_init(debug, DEFAULT_MSG_LEVEL);
4023
4024         handle->kinfo.netdev = netdev;
4025         handle->priv = (void *)priv;
4026
4027         hns3_init_mac_addr(netdev);
4028
4029         hns3_set_default_feature(netdev);
4030
4031         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
4032         netdev->priv_flags |= IFF_UNICAST_FLT;
4033         netdev->netdev_ops = &hns3_nic_netdev_ops;
4034         SET_NETDEV_DEV(netdev, &pdev->dev);
4035         hns3_ethtool_set_ops(netdev);
4036
4037         /* Carrier off reporting is important to ethtool even BEFORE open */
4038         netif_carrier_off(netdev);
4039
4040         ret = hns3_get_ring_config(priv);
4041         if (ret) {
4042                 ret = -ENOMEM;
4043                 goto out_get_ring_cfg;
4044         }
4045
4046         ret = hns3_nic_alloc_vector_data(priv);
4047         if (ret) {
4048                 ret = -ENOMEM;
4049                 goto out_alloc_vector_data;
4050         }
4051
4052         ret = hns3_nic_init_vector_data(priv);
4053         if (ret) {
4054                 ret = -ENOMEM;
4055                 goto out_init_vector_data;
4056         }
4057
4058         ret = hns3_init_all_ring(priv);
4059         if (ret) {
4060                 ret = -ENOMEM;
4061                 goto out_init_ring_data;
4062         }
4063
4064         ret = hns3_init_phy(netdev);
4065         if (ret)
4066                 goto out_init_phy;
4067
4068         ret = register_netdev(netdev);
4069         if (ret) {
4070                 dev_err(priv->dev, "probe register netdev fail!\n");
4071                 goto out_reg_netdev_fail;
4072         }
4073
4074         ret = hns3_client_start(handle);
4075         if (ret) {
4076                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
4077                 goto out_client_start;
4078         }
4079
4080         hns3_dcbnl_setup(handle);
4081
4082         hns3_dbg_init(handle);
4083
4084         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
4085         netdev->max_mtu = HNS3_MAX_MTU;
4086
4087         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4088
4089         if (netif_msg_drv(handle))
4090                 hns3_info_show(priv);
4091
4092         return ret;
4093
4094 out_client_start:
4095         unregister_netdev(netdev);
4096 out_reg_netdev_fail:
4097         hns3_uninit_phy(netdev);
4098 out_init_phy:
4099         hns3_uninit_all_ring(priv);
4100 out_init_ring_data:
4101         hns3_nic_uninit_vector_data(priv);
4102 out_init_vector_data:
4103         hns3_nic_dealloc_vector_data(priv);
4104 out_alloc_vector_data:
4105         priv->ring_data = NULL;
4106 out_get_ring_cfg:
4107         priv->ae_handle = NULL;
4108         free_netdev(netdev);
4109         return ret;
4110 }
4111
4112 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
4113 {
4114         struct net_device *netdev = handle->kinfo.netdev;
4115         struct hns3_nic_priv *priv = netdev_priv(netdev);
4116         int ret;
4117
4118         hns3_remove_hw_addr(netdev);
4119
4120         if (netdev->reg_state != NETREG_UNINITIALIZED)
4121                 unregister_netdev(netdev);
4122
4123         hns3_client_stop(handle);
4124
4125         hns3_uninit_phy(netdev);
4126
4127         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4128                 netdev_warn(netdev, "already uninitialized\n");
4129                 goto out_netdev_free;
4130         }
4131
4132         hns3_del_all_fd_rules(netdev, true);
4133
4134         hns3_clear_all_ring(handle, true);
4135
4136         hns3_nic_uninit_vector_data(priv);
4137
4138         ret = hns3_nic_dealloc_vector_data(priv);
4139         if (ret)
4140                 netdev_err(netdev, "dealloc vector error\n");
4141
4142         ret = hns3_uninit_all_ring(priv);
4143         if (ret)
4144                 netdev_err(netdev, "uninit ring error\n");
4145
4146         hns3_put_ring_config(priv);
4147
4148         hns3_dbg_uninit(handle);
4149
4150 out_netdev_free:
4151         free_netdev(netdev);
4152 }
4153
4154 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
4155 {
4156         struct net_device *netdev = handle->kinfo.netdev;
4157
4158         if (!netdev)
4159                 return;
4160
4161         if (linkup) {
4162                 netif_carrier_on(netdev);
4163                 netif_tx_wake_all_queues(netdev);
4164                 if (netif_msg_link(handle))
4165                         netdev_info(netdev, "link up\n");
4166         } else {
4167                 netif_carrier_off(netdev);
4168                 netif_tx_stop_all_queues(netdev);
4169                 if (netif_msg_link(handle))
4170                         netdev_info(netdev, "link down\n");
4171         }
4172 }
4173
4174 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
4175 {
4176         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4177         struct net_device *ndev = kinfo->netdev;
4178
4179         if (tc > HNAE3_MAX_TC)
4180                 return -EINVAL;
4181
4182         if (!ndev)
4183                 return -ENODEV;
4184
4185         return hns3_nic_set_real_num_queue(ndev);
4186 }
4187
4188 static int hns3_recover_hw_addr(struct net_device *ndev)
4189 {
4190         struct netdev_hw_addr_list *list;
4191         struct netdev_hw_addr *ha, *tmp;
4192         int ret = 0;
4193
4194         netif_addr_lock_bh(ndev);
4195         /* go through and sync uc_addr entries to the device */
4196         list = &ndev->uc;
4197         list_for_each_entry_safe(ha, tmp, &list->list, list) {
4198                 ret = hns3_nic_uc_sync(ndev, ha->addr);
4199                 if (ret)
4200                         goto out;
4201         }
4202
4203         /* go through and sync mc_addr entries to the device */
4204         list = &ndev->mc;
4205         list_for_each_entry_safe(ha, tmp, &list->list, list) {
4206                 ret = hns3_nic_mc_sync(ndev, ha->addr);
4207                 if (ret)
4208                         goto out;
4209         }
4210
4211 out:
4212         netif_addr_unlock_bh(ndev);
4213         return ret;
4214 }
4215
4216 static void hns3_remove_hw_addr(struct net_device *netdev)
4217 {
4218         struct netdev_hw_addr_list *list;
4219         struct netdev_hw_addr *ha, *tmp;
4220
4221         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
4222
4223         netif_addr_lock_bh(netdev);
4224         /* go through and unsync uc_addr entries to the device */
4225         list = &netdev->uc;
4226         list_for_each_entry_safe(ha, tmp, &list->list, list)
4227                 hns3_nic_uc_unsync(netdev, ha->addr);
4228
4229         /* go through and unsync mc_addr entries to the device */
4230         list = &netdev->mc;
4231         list_for_each_entry_safe(ha, tmp, &list->list, list)
4232                 if (ha->refcount > 1)
4233                         hns3_nic_mc_unsync(netdev, ha->addr);
4234
4235         netif_addr_unlock_bh(netdev);
4236 }
4237
4238 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
4239 {
4240         while (ring->next_to_clean != ring->next_to_use) {
4241                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
4242                 hns3_free_buffer_detach(ring, ring->next_to_clean);
4243                 ring_ptr_move_fw(ring, next_to_clean);
4244         }
4245 }
4246
4247 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
4248 {
4249         struct hns3_desc_cb res_cbs;
4250         int ret;
4251
4252         while (ring->next_to_use != ring->next_to_clean) {
4253                 /* When a buffer is not reused, it's memory has been
4254                  * freed in hns3_handle_rx_bd or will be freed by
4255                  * stack, so we need to replace the buffer here.
4256                  */
4257                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
4258                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
4259                         if (ret) {
4260                                 u64_stats_update_begin(&ring->syncp);
4261                                 ring->stats.sw_err_cnt++;
4262                                 u64_stats_update_end(&ring->syncp);
4263                                 /* if alloc new buffer fail, exit directly
4264                                  * and reclear in up flow.
4265                                  */
4266                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
4267                                             "reserve buffer map failed, ret = %d\n",
4268                                             ret);
4269                                 return ret;
4270                         }
4271                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
4272                 }
4273                 ring_ptr_move_fw(ring, next_to_use);
4274         }
4275
4276         /* Free the pending skb in rx ring */
4277         if (ring->skb) {
4278                 dev_kfree_skb_any(ring->skb);
4279                 ring->skb = NULL;
4280                 ring->pending_buf = 0;
4281         }
4282
4283         return 0;
4284 }
4285
4286 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
4287 {
4288         while (ring->next_to_use != ring->next_to_clean) {
4289                 /* When a buffer is not reused, it's memory has been
4290                  * freed in hns3_handle_rx_bd or will be freed by
4291                  * stack, so only need to unmap the buffer here.
4292                  */
4293                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
4294                         hns3_unmap_buffer(ring,
4295                                           &ring->desc_cb[ring->next_to_use]);
4296                         ring->desc_cb[ring->next_to_use].dma = 0;
4297                 }
4298
4299                 ring_ptr_move_fw(ring, next_to_use);
4300         }
4301 }
4302
4303 static void hns3_clear_all_ring(struct hnae3_handle *h, bool force)
4304 {
4305         struct net_device *ndev = h->kinfo.netdev;
4306         struct hns3_nic_priv *priv = netdev_priv(ndev);
4307         u32 i;
4308
4309         for (i = 0; i < h->kinfo.num_tqps; i++) {
4310                 struct hns3_enet_ring *ring;
4311
4312                 ring = priv->ring_data[i].ring;
4313                 hns3_clear_tx_ring(ring);
4314
4315                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
4316                 /* Continue to clear other rings even if clearing some
4317                  * rings failed.
4318                  */
4319                 if (force)
4320                         hns3_force_clear_rx_ring(ring);
4321                 else
4322                         hns3_clear_rx_ring(ring);
4323         }
4324 }
4325
4326 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
4327 {
4328         struct net_device *ndev = h->kinfo.netdev;
4329         struct hns3_nic_priv *priv = netdev_priv(ndev);
4330         struct hns3_enet_ring *rx_ring;
4331         int i, j;
4332         int ret;
4333
4334         for (i = 0; i < h->kinfo.num_tqps; i++) {
4335                 ret = h->ae_algo->ops->reset_queue(h, i);
4336                 if (ret)
4337                         return ret;
4338
4339                 hns3_init_ring_hw(priv->ring_data[i].ring);
4340
4341                 /* We need to clear tx ring here because self test will
4342                  * use the ring and will not run down before up
4343                  */
4344                 hns3_clear_tx_ring(priv->ring_data[i].ring);
4345                 priv->ring_data[i].ring->next_to_clean = 0;
4346                 priv->ring_data[i].ring->next_to_use = 0;
4347
4348                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
4349                 hns3_init_ring_hw(rx_ring);
4350                 ret = hns3_clear_rx_ring(rx_ring);
4351                 if (ret)
4352                         return ret;
4353
4354                 /* We can not know the hardware head and tail when this
4355                  * function is called in reset flow, so we reuse all desc.
4356                  */
4357                 for (j = 0; j < rx_ring->desc_num; j++)
4358                         hns3_reuse_buffer(rx_ring, j);
4359
4360                 rx_ring->next_to_clean = 0;
4361                 rx_ring->next_to_use = 0;
4362         }
4363
4364         hns3_init_tx_ring_tc(priv);
4365
4366         return 0;
4367 }
4368
4369 static void hns3_store_coal(struct hns3_nic_priv *priv)
4370 {
4371         /* ethtool only support setting and querying one coal
4372          * configuration for now, so save the vector 0' coal
4373          * configuration here in order to restore it.
4374          */
4375         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
4376                sizeof(struct hns3_enet_coalesce));
4377         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
4378                sizeof(struct hns3_enet_coalesce));
4379 }
4380
4381 static void hns3_restore_coal(struct hns3_nic_priv *priv)
4382 {
4383         u16 vector_num = priv->vector_num;
4384         int i;
4385
4386         for (i = 0; i < vector_num; i++) {
4387                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
4388                        sizeof(struct hns3_enet_coalesce));
4389                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
4390                        sizeof(struct hns3_enet_coalesce));
4391         }
4392 }
4393
4394 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
4395 {
4396         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
4397         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4398         struct net_device *ndev = kinfo->netdev;
4399         struct hns3_nic_priv *priv = netdev_priv(ndev);
4400
4401         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
4402                 return 0;
4403
4404         /* it is cumbersome for hardware to pick-and-choose entries for deletion
4405          * from table space. Hence, for function reset software intervention is
4406          * required to delete the entries
4407          */
4408         if (hns3_dev_ongoing_func_reset(ae_dev)) {
4409                 hns3_remove_hw_addr(ndev);
4410                 hns3_del_all_fd_rules(ndev, false);
4411         }
4412
4413         if (!netif_running(ndev))
4414                 return 0;
4415
4416         return hns3_nic_net_stop(ndev);
4417 }
4418
4419 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
4420 {
4421         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4422         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
4423         int ret = 0;
4424
4425         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4426
4427         if (netif_running(kinfo->netdev)) {
4428                 ret = hns3_nic_net_open(kinfo->netdev);
4429                 if (ret) {
4430                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4431                         netdev_err(kinfo->netdev,
4432                                    "net up fail, ret=%d!\n", ret);
4433                         return ret;
4434                 }
4435         }
4436
4437         return ret;
4438 }
4439
4440 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4441 {
4442         struct net_device *netdev = handle->kinfo.netdev;
4443         struct hns3_nic_priv *priv = netdev_priv(netdev);
4444         int ret;
4445
4446         /* Carrier off reporting is important to ethtool even BEFORE open */
4447         netif_carrier_off(netdev);
4448
4449         ret = hns3_get_ring_config(priv);
4450         if (ret)
4451                 return ret;
4452
4453         ret = hns3_nic_alloc_vector_data(priv);
4454         if (ret)
4455                 goto err_put_ring;
4456
4457         hns3_restore_coal(priv);
4458
4459         ret = hns3_nic_init_vector_data(priv);
4460         if (ret)
4461                 goto err_dealloc_vector;
4462
4463         ret = hns3_init_all_ring(priv);
4464         if (ret)
4465                 goto err_uninit_vector;
4466
4467         ret = hns3_client_start(handle);
4468         if (ret) {
4469                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
4470                 goto err_uninit_ring;
4471         }
4472
4473         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4474
4475         return ret;
4476
4477 err_uninit_ring:
4478         hns3_uninit_all_ring(priv);
4479 err_uninit_vector:
4480         hns3_nic_uninit_vector_data(priv);
4481 err_dealloc_vector:
4482         hns3_nic_dealloc_vector_data(priv);
4483 err_put_ring:
4484         hns3_put_ring_config(priv);
4485
4486         return ret;
4487 }
4488
4489 static int hns3_reset_notify_restore_enet(struct hnae3_handle *handle)
4490 {
4491         struct net_device *netdev = handle->kinfo.netdev;
4492         bool vlan_filter_enable;
4493         int ret;
4494
4495         ret = hns3_init_mac_addr(netdev);
4496         if (ret)
4497                 return ret;
4498
4499         ret = hns3_recover_hw_addr(netdev);
4500         if (ret)
4501                 return ret;
4502
4503         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4504         if (ret)
4505                 return ret;
4506
4507         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4508         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4509
4510         if (handle->ae_algo->ops->restore_vlan_table)
4511                 handle->ae_algo->ops->restore_vlan_table(handle);
4512
4513         return hns3_restore_fd_rules(netdev);
4514 }
4515
4516 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4517 {
4518         struct net_device *netdev = handle->kinfo.netdev;
4519         struct hns3_nic_priv *priv = netdev_priv(netdev);
4520         int ret;
4521
4522         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4523                 netdev_warn(netdev, "already uninitialized\n");
4524                 return 0;
4525         }
4526
4527         hns3_clear_all_ring(handle, true);
4528         hns3_reset_tx_queue(priv->ae_handle);
4529
4530         hns3_nic_uninit_vector_data(priv);
4531
4532         hns3_store_coal(priv);
4533
4534         ret = hns3_nic_dealloc_vector_data(priv);
4535         if (ret)
4536                 netdev_err(netdev, "dealloc vector error\n");
4537
4538         ret = hns3_uninit_all_ring(priv);
4539         if (ret)
4540                 netdev_err(netdev, "uninit ring error\n");
4541
4542         hns3_put_ring_config(priv);
4543
4544         return ret;
4545 }
4546
4547 static int hns3_reset_notify(struct hnae3_handle *handle,
4548                              enum hnae3_reset_notify_type type)
4549 {
4550         int ret = 0;
4551
4552         switch (type) {
4553         case HNAE3_UP_CLIENT:
4554                 ret = hns3_reset_notify_up_enet(handle);
4555                 break;
4556         case HNAE3_DOWN_CLIENT:
4557                 ret = hns3_reset_notify_down_enet(handle);
4558                 break;
4559         case HNAE3_INIT_CLIENT:
4560                 ret = hns3_reset_notify_init_enet(handle);
4561                 break;
4562         case HNAE3_UNINIT_CLIENT:
4563                 ret = hns3_reset_notify_uninit_enet(handle);
4564                 break;
4565         case HNAE3_RESTORE_CLIENT:
4566                 ret = hns3_reset_notify_restore_enet(handle);
4567                 break;
4568         default:
4569                 break;
4570         }
4571
4572         return ret;
4573 }
4574
4575 static int hns3_change_channels(struct hnae3_handle *handle, u32 new_tqp_num,
4576                                 bool rxfh_configured)
4577 {
4578         int ret;
4579
4580         ret = handle->ae_algo->ops->set_channels(handle, new_tqp_num,
4581                                                  rxfh_configured);
4582         if (ret) {
4583                 dev_err(&handle->pdev->dev,
4584                         "Change tqp num(%u) fail.\n", new_tqp_num);
4585                 return ret;
4586         }
4587
4588         ret = hns3_reset_notify(handle, HNAE3_INIT_CLIENT);
4589         if (ret)
4590                 return ret;
4591
4592         ret =  hns3_reset_notify(handle, HNAE3_UP_CLIENT);
4593         if (ret)
4594                 hns3_reset_notify(handle, HNAE3_UNINIT_CLIENT);
4595
4596         return ret;
4597 }
4598
4599 int hns3_set_channels(struct net_device *netdev,
4600                       struct ethtool_channels *ch)
4601 {
4602         struct hnae3_handle *h = hns3_get_handle(netdev);
4603         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4604         bool rxfh_configured = netif_is_rxfh_configured(netdev);
4605         u32 new_tqp_num = ch->combined_count;
4606         u16 org_tqp_num;
4607         int ret;
4608
4609         if (hns3_nic_resetting(netdev))
4610                 return -EBUSY;
4611
4612         if (ch->rx_count || ch->tx_count)
4613                 return -EINVAL;
4614
4615         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4616             new_tqp_num < 1) {
4617                 dev_err(&netdev->dev,
4618                         "Change tqps fail, the tqp range is from 1 to %d",
4619                         hns3_get_max_available_channels(h));
4620                 return -EINVAL;
4621         }
4622
4623         if (kinfo->rss_size == new_tqp_num)
4624                 return 0;
4625
4626         netif_dbg(h, drv, netdev,
4627                   "set channels: tqp_num=%u, rxfh=%d\n",
4628                   new_tqp_num, rxfh_configured);
4629
4630         ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
4631         if (ret)
4632                 return ret;
4633
4634         ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
4635         if (ret)
4636                 return ret;
4637
4638         org_tqp_num = h->kinfo.num_tqps;
4639         ret = hns3_change_channels(h, new_tqp_num, rxfh_configured);
4640         if (ret) {
4641                 int ret1;
4642
4643                 netdev_warn(netdev,
4644                             "Change channels fail, revert to old value\n");
4645                 ret1 = hns3_change_channels(h, org_tqp_num, rxfh_configured);
4646                 if (ret1) {
4647                         netdev_err(netdev,
4648                                    "revert to old channel fail\n");
4649                         return ret1;
4650                 }
4651
4652                 return ret;
4653         }
4654
4655         return 0;
4656 }
4657
4658 static const struct hns3_hw_error_info hns3_hw_err[] = {
4659         { .type = HNAE3_PPU_POISON_ERROR,
4660           .msg = "PPU poison" },
4661         { .type = HNAE3_CMDQ_ECC_ERROR,
4662           .msg = "IMP CMDQ error" },
4663         { .type = HNAE3_IMP_RD_POISON_ERROR,
4664           .msg = "IMP RD poison" },
4665 };
4666
4667 static void hns3_process_hw_error(struct hnae3_handle *handle,
4668                                   enum hnae3_hw_error_type type)
4669 {
4670         int i;
4671
4672         for (i = 0; i < ARRAY_SIZE(hns3_hw_err); i++) {
4673                 if (hns3_hw_err[i].type == type) {
4674                         dev_err(&handle->pdev->dev, "Detected %s!\n",
4675                                 hns3_hw_err[i].msg);
4676                         break;
4677                 }
4678         }
4679 }
4680
4681 static const struct hnae3_client_ops client_ops = {
4682         .init_instance = hns3_client_init,
4683         .uninit_instance = hns3_client_uninit,
4684         .link_status_change = hns3_link_status_change,
4685         .setup_tc = hns3_client_setup_tc,
4686         .reset_notify = hns3_reset_notify,
4687         .process_hw_error = hns3_process_hw_error,
4688 };
4689
4690 /* hns3_init_module - Driver registration routine
4691  * hns3_init_module is the first routine called when the driver is
4692  * loaded. All it does is register with the PCI subsystem.
4693  */
4694 static int __init hns3_init_module(void)
4695 {
4696         int ret;
4697
4698         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4699         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4700
4701         client.type = HNAE3_CLIENT_KNIC;
4702         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4703                  hns3_driver_name);
4704
4705         client.ops = &client_ops;
4706
4707         INIT_LIST_HEAD(&client.node);
4708
4709         hns3_dbg_register_debugfs(hns3_driver_name);
4710
4711         ret = hnae3_register_client(&client);
4712         if (ret)
4713                 goto err_reg_client;
4714
4715         ret = pci_register_driver(&hns3_driver);
4716         if (ret)
4717                 goto err_reg_driver;
4718
4719         return ret;
4720
4721 err_reg_driver:
4722         hnae3_unregister_client(&client);
4723 err_reg_client:
4724         hns3_dbg_unregister_debugfs();
4725         return ret;
4726 }
4727 module_init(hns3_init_module);
4728
4729 /* hns3_exit_module - Driver exit cleanup routine
4730  * hns3_exit_module is called just before the driver is removed
4731  * from memory.
4732  */
4733 static void __exit hns3_exit_module(void)
4734 {
4735         pci_unregister_driver(&hns3_driver);
4736         hnae3_unregister_client(&client);
4737         hns3_dbg_unregister_debugfs();
4738 }
4739 module_exit(hns3_exit_module);
4740
4741 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4742 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4743 MODULE_LICENSE("GPL");
4744 MODULE_ALIAS("pci:hns-nic");
4745 MODULE_VERSION(HNS3_MOD_VERSION);