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 #include <linux/if_vlan.h>
   8 #include <linux/ip.h>
   9 #include <linux/ipv6.h>
  10 #include <linux/module.h>
  11 #include <linux/pci.h>
  12 #include <linux/aer.h>
  13 #include <linux/skbuff.h>
  14 #include <linux/sctp.h>
  15 #include <linux/vermagic.h>
  16 #include <net/gre.h>
  17 #include <net/pkt_cls.h>
  18 #include <net/tcp.h>
  19 #include <net/vxlan.h>
  20
  21 #include "hnae3.h"
  22 #include "hns3_enet.h"
  23
  24 static void hns3_clear_all_ring(struct hnae3_handle *h);
  25 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h);
  26 static void hns3_remove_hw_addr(struct net_device *netdev);
  27
  28 static const char hns3_driver_name[] = "hns3";
  29 const char hns3_driver_version[] = VERMAGIC_STRING;
  30 static const char hns3_driver_string[] =
  31                         "Hisilicon Ethernet Network Driver for Hip08 Family";
  32 static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
  33 static struct hnae3_client client;
  34
  35 /* hns3_pci_tbl - PCI Device ID Table
  36  *
  37  * Last entry must be all 0s
  38  *
  39  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  40  *   Class, Class Mask, private data (not used) }
  41  */
  42 static const struct pci_device_id hns3_pci_tbl[] = {
  43         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
  44         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
  45         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA),
  46          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  47         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC),
  48          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  49         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA),
  50          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  51         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC),
  52          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  53         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC),
  54          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  55         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_VF), 0},
  56         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF),
  57          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  58         /* required last entry */
  59         {0, }
  60 };
  61 MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);
  62
  63 static irqreturn_t hns3_irq_handle(int irq, void *vector)
  64 {
  65         struct hns3_enet_tqp_vector *tqp_vector = vector;
  66
  67         napi_schedule(&tqp_vector->napi);
  68
  69         return IRQ_HANDLED;
  70 }
  71
  72 /* This callback function is used to set affinity changes to the irq affinity
  73  * masks when the irq_set_affinity_notifier function is used.
  74  */
  75 static void hns3_nic_irq_affinity_notify(struct irq_affinity_notify *notify,
  76                                          const cpumask_t *mask)
  77 {
  78         struct hns3_enet_tqp_vector *tqp_vectors =
  79                 container_of(notify, struct hns3_enet_tqp_vector,
  80                              affinity_notify);
  81
  82         tqp_vectors->affinity_mask = *mask;
  83 }
  84
  85 static void hns3_nic_irq_affinity_release(struct kref *ref)
  86 {
  87 }
  88
  89 static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
  90 {
  91         struct hns3_enet_tqp_vector *tqp_vectors;
  92         unsigned int i;
  93
  94         for (i = 0; i < priv->vector_num; i++) {
  95                 tqp_vectors = &priv->tqp_vector[i];
  96
  97                 if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
  98                         continue;
  99
 100                 /* clear the affinity notifier and affinity mask */
 101                 irq_set_affinity_notifier(tqp_vectors->vector_irq, NULL);
 102                 irq_set_affinity_hint(tqp_vectors->vector_irq, NULL);
 103
 104                 /* release the irq resource */
 105                 free_irq(tqp_vectors->vector_irq, tqp_vectors);
 106                 tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
 107         }
 108 }
 109
 110 static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 111 {
 112         struct hns3_enet_tqp_vector *tqp_vectors;
 113         int txrx_int_idx = 0;
 114         int rx_int_idx = 0;
 115         int tx_int_idx = 0;
 116         unsigned int i;
 117         int ret;
 118
 119         for (i = 0; i < priv->vector_num; i++) {
 120                 tqp_vectors = &priv->tqp_vector[i];
 121
 122                 if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
 123                         continue;
 124
 125                 if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
 126                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 127                                  "%s-%s-%d", priv->netdev->name, "TxRx",
 128                                  txrx_int_idx++);
 129                         txrx_int_idx++;
 130                 } else if (tqp_vectors->rx_group.ring) {
 131                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 132                                  "%s-%s-%d", priv->netdev->name, "Rx",
 133                                  rx_int_idx++);
 134                 } else if (tqp_vectors->tx_group.ring) {
 135                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 136                                  "%s-%s-%d", priv->netdev->name, "Tx",
 137                                  tx_int_idx++);
 138                 } else {
 139                         /* Skip this unused q_vector */
 140                         continue;
 141                 }
 142
 143                 tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
 144
 145                 ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
 146                                   tqp_vectors->name,
 147                                        tqp_vectors);
 148                 if (ret) {
 149                         netdev_err(priv->netdev, "request irq(%d) fail\n",
 150                                    tqp_vectors->vector_irq);
 151                         return ret;
 152                 }
 153
 154                 tqp_vectors->affinity_notify.notify =
 155                                         hns3_nic_irq_affinity_notify;
 156                 tqp_vectors->affinity_notify.release =
 157                                         hns3_nic_irq_affinity_release;
 158                 irq_set_affinity_notifier(tqp_vectors->vector_irq,
 159                                           &tqp_vectors->affinity_notify);
 160                 irq_set_affinity_hint(tqp_vectors->vector_irq,
 161                                       &tqp_vectors->affinity_mask);
 162
 163                 tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
 164         }
 165
 166         return 0;
 167 }
 168
 169 static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
 170                                  u32 mask_en)
 171 {
 172         writel(mask_en, tqp_vector->mask_addr);
 173 }
 174
 175 static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
 176 {
 177         napi_enable(&tqp_vector->napi);
 178
 179         /* enable vector */
 180         hns3_mask_vector_irq(tqp_vector, 1);
 181 }
 182
 183 static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
 184 {
 185         /* disable vector */
 186         hns3_mask_vector_irq(tqp_vector, 0);
 187
 188         disable_irq(tqp_vector->vector_irq);
 189         napi_disable(&tqp_vector->napi);
 190 }
 191
 192 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 193                                  u32 rl_value)
 194 {
 195         u32 rl_reg = hns3_rl_usec_to_reg(rl_value);
 196
 197         /* this defines the configuration for RL (Interrupt Rate Limiter).
 198          * Rl defines rate of interrupts i.e. number of interrupts-per-second
 199          * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
 200          */
 201
 202         if (rl_reg > 0 && !tqp_vector->tx_group.coal.gl_adapt_enable &&
 203             !tqp_vector->rx_group.coal.gl_adapt_enable)
 204                 /* According to the hardware, the range of rl_reg is
 205                  * 0-59 and the unit is 4.
 206                  */
 207                 rl_reg |=  HNS3_INT_RL_ENABLE_MASK;
 208
 209         writel(rl_reg, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
 210 }
 211
 212 void hns3_set_vector_coalesce_rx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 213                                     u32 gl_value)
 214 {
 215         u32 rx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 216
 217         writel(rx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
 218 }
 219
 220 void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 221                                     u32 gl_value)
 222 {
 223         u32 tx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 224
 225         writel(tx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
 226 }
 227
 228 static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
 229                                    struct hns3_nic_priv *priv)
 230 {
 231         /* initialize the configuration for interrupt coalescing.
 232          * 1. GL (Interrupt Gap Limiter)
 233          * 2. RL (Interrupt Rate Limiter)
 234          */
 235
 236         /* Default: enable interrupt coalescing self-adaptive and GL */
 237         tqp_vector->tx_group.coal.gl_adapt_enable = 1;
 238         tqp_vector->rx_group.coal.gl_adapt_enable = 1;
 239
 240         tqp_vector->tx_group.coal.int_gl = HNS3_INT_GL_50K;
 241         tqp_vector->rx_group.coal.int_gl = HNS3_INT_GL_50K;
 242
 243         tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
 244         tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
 245 }
 246
 247 static void hns3_vector_gl_rl_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
 248                                       struct hns3_nic_priv *priv)
 249 {
 250         struct hnae3_handle *h = priv->ae_handle;
 251
 252         hns3_set_vector_coalesce_tx_gl(tqp_vector,
 253                                        tqp_vector->tx_group.coal.int_gl);
 254         hns3_set_vector_coalesce_rx_gl(tqp_vector,
 255                                        tqp_vector->rx_group.coal.int_gl);
 256         hns3_set_vector_coalesce_rl(tqp_vector, h->kinfo.int_rl_setting);
 257 }
 258
 259 static int hns3_nic_set_real_num_queue(struct net_device *netdev)
 260 {
 261         struct hnae3_handle *h = hns3_get_handle(netdev);
 262         struct hnae3_knic_private_info *kinfo = &h->kinfo;
 263         unsigned int queue_size = kinfo->rss_size * kinfo->num_tc;
 264         int i, ret;
 265
 266         if (kinfo->num_tc <= 1) {
 267                 netdev_reset_tc(netdev);
 268         } else {
 269                 ret = netdev_set_num_tc(netdev, kinfo->num_tc);
 270                 if (ret) {
 271                         netdev_err(netdev,
 272                                    "netdev_set_num_tc fail, ret=%d!\n", ret);
 273                         return ret;
 274                 }
 275
 276                 for (i = 0; i < HNAE3_MAX_TC; i++) {
 277                         if (!kinfo->tc_info[i].enable)
 278                                 continue;
 279
 280                         netdev_set_tc_queue(netdev,
 281                                             kinfo->tc_info[i].tc,
 282                                             kinfo->tc_info[i].tqp_count,
 283                                             kinfo->tc_info[i].tqp_offset);
 284                 }
 285         }
 286
 287         ret = netif_set_real_num_tx_queues(netdev, queue_size);
 288         if (ret) {
 289                 netdev_err(netdev,
 290                            "netif_set_real_num_tx_queues fail, ret=%d!\n",
 291                            ret);
 292                 return ret;
 293         }
 294
 295         ret = netif_set_real_num_rx_queues(netdev, queue_size);
 296         if (ret) {
 297                 netdev_err(netdev,
 298                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
 299                 return ret;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static u16 hns3_get_max_available_channels(struct hnae3_handle *h)
 306 {
 307         u16 alloc_tqps, max_rss_size, rss_size;
 308
 309         h->ae_algo->ops->get_tqps_and_rss_info(h, &alloc_tqps, &max_rss_size);
 310         rss_size = alloc_tqps / h->kinfo.num_tc;
 311
 312         return min_t(u16, rss_size, max_rss_size);
 313 }
 314
 315 static void hns3_tqp_enable(struct hnae3_queue *tqp)
 316 {
 317         u32 rcb_reg;
 318
 319         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 320         rcb_reg |= BIT(HNS3_RING_EN_B);
 321         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 322 }
 323
 324 static void hns3_tqp_disable(struct hnae3_queue *tqp)
 325 {
 326         u32 rcb_reg;
 327
 328         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 329         rcb_reg &= ~BIT(HNS3_RING_EN_B);
 330         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 331 }
 332
 333 static int hns3_nic_net_up(struct net_device *netdev)
 334 {
 335         struct hns3_nic_priv *priv = netdev_priv(netdev);
 336         struct hnae3_handle *h = priv->ae_handle;
 337         int i, j;
 338         int ret;
 339
 340         ret = hns3_nic_reset_all_ring(h);
 341         if (ret)
 342                 return ret;
 343
 344         /* get irq resource for all vectors */
 345         ret = hns3_nic_init_irq(priv);
 346         if (ret) {
 347                 netdev_err(netdev, "hns init irq failed! ret=%d\n", ret);
 348                 return ret;
 349         }
 350
 351         /* enable the vectors */
 352         for (i = 0; i < priv->vector_num; i++)
 353                 hns3_vector_enable(&priv->tqp_vector[i]);
 354
 355         /* enable rcb */
 356         for (j = 0; j < h->kinfo.num_tqps; j++)
 357                 hns3_tqp_enable(h->kinfo.tqp[j]);
 358
 359         /* start the ae_dev */
 360         ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
 361         if (ret)
 362                 goto out_start_err;
 363
 364         clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 365
 366         return 0;
 367
 368 out_start_err:
 369         while (j--)
 370                 hns3_tqp_disable(h->kinfo.tqp[j]);
 371
 372         for (j = i - 1; j >= 0; j--)
 373                 hns3_vector_disable(&priv->tqp_vector[j]);
 374
 375         hns3_nic_uninit_irq(priv);
 376
 377         return ret;
 378 }
 379
 380 static int hns3_nic_net_open(struct net_device *netdev)
 381 {
 382         struct hns3_nic_priv *priv = netdev_priv(netdev);
 383         struct hnae3_handle *h = hns3_get_handle(netdev);
 384         struct hnae3_knic_private_info *kinfo;
 385         int i, ret;
 386
 387         if (hns3_nic_resetting(netdev))
 388                 return -EBUSY;
 389
 390         netif_carrier_off(netdev);
 391
 392         ret = hns3_nic_set_real_num_queue(netdev);
 393         if (ret)
 394                 return ret;
 395
 396         ret = hns3_nic_net_up(netdev);
 397         if (ret) {
 398                 netdev_err(netdev,
 399                            "hns net up fail, ret=%d!\n", ret);
 400                 return ret;
 401         }
 402
 403         kinfo = &h->kinfo;
 404         for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) {
 405                 netdev_set_prio_tc_map(netdev, i,
 406                                        kinfo->prio_tc[i]);
 407         }
 408
 409         if (h->ae_algo->ops->set_timer_task)
 410                 h->ae_algo->ops->set_timer_task(priv->ae_handle, true);
 411
 412         return 0;
 413 }
 414
 415 static void hns3_nic_net_down(struct net_device *netdev)
 416 {
 417         struct hns3_nic_priv *priv = netdev_priv(netdev);
 418         struct hnae3_handle *h = hns3_get_handle(netdev);
 419         const struct hnae3_ae_ops *ops;
 420         int i;
 421
 422         /* disable vectors */
 423         for (i = 0; i < priv->vector_num; i++)
 424                 hns3_vector_disable(&priv->tqp_vector[i]);
 425
 426         /* disable rcb */
 427         for (i = 0; i < h->kinfo.num_tqps; i++)
 428                 hns3_tqp_disable(h->kinfo.tqp[i]);
 429
 430         /* stop ae_dev */
 431         ops = priv->ae_handle->ae_algo->ops;
 432         if (ops->stop)
 433                 ops->stop(priv->ae_handle);
 434
 435         /* free irq resources */
 436         hns3_nic_uninit_irq(priv);
 437
 438         hns3_clear_all_ring(priv->ae_handle);
 439 }
 440
 441 static int hns3_nic_net_stop(struct net_device *netdev)
 442 {
 443         struct hns3_nic_priv *priv = netdev_priv(netdev);
 444         struct hnae3_handle *h = hns3_get_handle(netdev);
 445
 446         if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
 447                 return 0;
 448
 449         if (h->ae_algo->ops->set_timer_task)
 450                 h->ae_algo->ops->set_timer_task(priv->ae_handle, false);
 451
 452         netif_tx_stop_all_queues(netdev);
 453         netif_carrier_off(netdev);
 454
 455         hns3_nic_net_down(netdev);
 456
 457         return 0;
 458 }
 459
 460 static int hns3_nic_uc_sync(struct net_device *netdev,
 461                             const unsigned char *addr)
 462 {
 463         struct hnae3_handle *h = hns3_get_handle(netdev);
 464
 465         if (h->ae_algo->ops->add_uc_addr)
 466                 return h->ae_algo->ops->add_uc_addr(h, addr);
 467
 468         return 0;
 469 }
 470
 471 static int hns3_nic_uc_unsync(struct net_device *netdev,
 472                               const unsigned char *addr)
 473 {
 474         struct hnae3_handle *h = hns3_get_handle(netdev);
 475
 476         if (h->ae_algo->ops->rm_uc_addr)
 477                 return h->ae_algo->ops->rm_uc_addr(h, addr);
 478
 479         return 0;
 480 }
 481
 482 static int hns3_nic_mc_sync(struct net_device *netdev,
 483                             const unsigned char *addr)
 484 {
 485         struct hnae3_handle *h = hns3_get_handle(netdev);
 486
 487         if (h->ae_algo->ops->add_mc_addr)
 488                 return h->ae_algo->ops->add_mc_addr(h, addr);
 489
 490         return 0;
 491 }
 492
 493 static int hns3_nic_mc_unsync(struct net_device *netdev,
 494                               const unsigned char *addr)
 495 {
 496         struct hnae3_handle *h = hns3_get_handle(netdev);
 497
 498         if (h->ae_algo->ops->rm_mc_addr)
 499                 return h->ae_algo->ops->rm_mc_addr(h, addr);
 500
 501         return 0;
 502 }
 503
 504 static u8 hns3_get_netdev_flags(struct net_device *netdev)
 505 {
 506         u8 flags = 0;
 507
 508         if (netdev->flags & IFF_PROMISC) {
 509                 flags = HNAE3_USER_UPE | HNAE3_USER_MPE;
 510         } else {
 511                 flags |= HNAE3_VLAN_FLTR;
 512                 if (netdev->flags & IFF_ALLMULTI)
 513                         flags |= HNAE3_USER_MPE;
 514         }
 515
 516         return flags;
 517 }
 518
 519 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 520 {
 521         struct hnae3_handle *h = hns3_get_handle(netdev);
 522         u8 new_flags;
 523         int ret;
 524
 525         new_flags = hns3_get_netdev_flags(netdev);
 526
 527         ret = __dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync);
 528         if (ret) {
 529                 netdev_err(netdev, "sync uc address fail\n");
 530                 if (ret == -ENOSPC)
 531                         new_flags |= HNAE3_OVERFLOW_UPE;
 532         }
 533
 534         if (netdev->flags & IFF_MULTICAST) {
 535                 ret = __dev_mc_sync(netdev, hns3_nic_mc_sync,
 536                                     hns3_nic_mc_unsync);
 537                 if (ret) {
 538                         netdev_err(netdev, "sync mc address fail\n");
 539                         if (ret == -ENOSPC)
 540                                 new_flags |= HNAE3_OVERFLOW_MPE;
 541                 }
 542         }
 543
 544         hns3_update_promisc_mode(netdev, new_flags);
 545         /* User mode Promisc mode enable and vlan filtering is disabled to
 546          * let all packets in. MAC-VLAN Table overflow Promisc enabled and
 547          * vlan fitering is enabled
 548          */
 549         hns3_enable_vlan_filter(netdev, new_flags & HNAE3_VLAN_FLTR);
 550         h->netdev_flags = new_flags;
 551 }
 552
 553 int hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags)
 554 {
 555         struct hns3_nic_priv *priv = netdev_priv(netdev);
 556         struct hnae3_handle *h = priv->ae_handle;
 557
 558         if (h->ae_algo->ops->set_promisc_mode) {
 559                 return h->ae_algo->ops->set_promisc_mode(h,
 560                                                 promisc_flags & HNAE3_UPE,
 561                                                 promisc_flags & HNAE3_MPE);
 562         }
 563
 564         return 0;
 565 }
 566
 567 void hns3_enable_vlan_filter(struct net_device *netdev, bool enable)
 568 {
 569         struct hns3_nic_priv *priv = netdev_priv(netdev);
 570         struct hnae3_handle *h = priv->ae_handle;
 571         bool last_state;
 572
 573         if (h->pdev->revision >= 0x21 && h->ae_algo->ops->enable_vlan_filter) {
 574                 last_state = h->netdev_flags & HNAE3_VLAN_FLTR ? true : false;
 575                 if (enable != last_state) {
 576                         netdev_info(netdev,
 577                                     "%s vlan filter\n",
 578                                     enable ? "enable" : "disable");
 579                         h->ae_algo->ops->enable_vlan_filter(h, enable);
 580                 }
 581         }
 582 }
 583
 584 static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
 585                         u16 *mss, u32 *type_cs_vlan_tso)
 586 {
 587         u32 l4_offset, hdr_len;
 588         union l3_hdr_info l3;
 589         union l4_hdr_info l4;
 590         u32 l4_paylen;
 591         int ret;
 592
 593         if (!skb_is_gso(skb))
 594                 return 0;
 595
 596         ret = skb_cow_head(skb, 0);
 597         if (ret)
 598                 return ret;
 599
 600         l3.hdr = skb_network_header(skb);
 601         l4.hdr = skb_transport_header(skb);
 602
 603         /* Software should clear the IPv4's checksum field when tso is
 604          * needed.
 605          */
 606         if (l3.v4->version == 4)
 607                 l3.v4->check = 0;
 608
 609         /* tunnel packet.*/
 610         if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 611                                          SKB_GSO_GRE_CSUM |
 612                                          SKB_GSO_UDP_TUNNEL |
 613                                          SKB_GSO_UDP_TUNNEL_CSUM)) {
 614                 if ((!(skb_shinfo(skb)->gso_type &
 615                     SKB_GSO_PARTIAL)) &&
 616                     (skb_shinfo(skb)->gso_type &
 617                     SKB_GSO_UDP_TUNNEL_CSUM)) {
 618                         /* Software should clear the udp's checksum
 619                          * field when tso is needed.
 620                          */
 621                         l4.udp->check = 0;
 622                 }
 623                 /* reset l3&l4 pointers from outer to inner headers */
 624                 l3.hdr = skb_inner_network_header(skb);
 625                 l4.hdr = skb_inner_transport_header(skb);
 626
 627                 /* Software should clear the IPv4's checksum field when
 628                  * tso is needed.
 629                  */
 630                 if (l3.v4->version == 4)
 631                         l3.v4->check = 0;
 632         }
 633
 634         /* normal or tunnel packet*/
 635         l4_offset = l4.hdr - skb->data;
 636         hdr_len = (l4.tcp->doff * 4) + l4_offset;
 637
 638         /* remove payload length from inner pseudo checksum when tso*/
 639         l4_paylen = skb->len - l4_offset;
 640         csum_replace_by_diff(&l4.tcp->check,
 641                              (__force __wsum)htonl(l4_paylen));
 642
 643         /* find the txbd field values */
 644         *paylen = skb->len - hdr_len;
 645         hnae3_set_bit(*type_cs_vlan_tso,
 646                       HNS3_TXD_TSO_B, 1);
 647
 648         /* get MSS for TSO */
 649         *mss = skb_shinfo(skb)->gso_size;
 650
 651         return 0;
 652 }
 653
 654 static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 655                                 u8 *il4_proto)
 656 {
 657         union {
 658                 struct iphdr *v4;
 659                 struct ipv6hdr *v6;
 660                 unsigned char *hdr;
 661         } l3;
 662         unsigned char *l4_hdr;
 663         unsigned char *exthdr;
 664         u8 l4_proto_tmp;
 665         __be16 frag_off;
 666
 667         /* find outer header point */
 668         l3.hdr = skb_network_header(skb);
 669         l4_hdr = skb_transport_header(skb);
 670
 671         if (skb->protocol == htons(ETH_P_IPV6)) {
 672                 exthdr = l3.hdr + sizeof(*l3.v6);
 673                 l4_proto_tmp = l3.v6->nexthdr;
 674                 if (l4_hdr != exthdr)
 675                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 676                                          &l4_proto_tmp, &frag_off);
 677         } else if (skb->protocol == htons(ETH_P_IP)) {
 678                 l4_proto_tmp = l3.v4->protocol;
 679         } else {
 680                 return -EINVAL;
 681         }
 682
 683         *ol4_proto = l4_proto_tmp;
 684
 685         /* tunnel packet */
 686         if (!skb->encapsulation) {
 687                 *il4_proto = 0;
 688                 return 0;
 689         }
 690
 691         /* find inner header point */
 692         l3.hdr = skb_inner_network_header(skb);
 693         l4_hdr = skb_inner_transport_header(skb);
 694
 695         if (l3.v6->version == 6) {
 696                 exthdr = l3.hdr + sizeof(*l3.v6);
 697                 l4_proto_tmp = l3.v6->nexthdr;
 698                 if (l4_hdr != exthdr)
 699                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 700                                          &l4_proto_tmp, &frag_off);
 701         } else if (l3.v4->version == 4) {
 702                 l4_proto_tmp = l3.v4->protocol;
 703         }
 704
 705         *il4_proto = l4_proto_tmp;
 706
 707         return 0;
 708 }
 709
 710 static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
 711                                 u8 il4_proto, u32 *type_cs_vlan_tso,
 712                                 u32 *ol_type_vlan_len_msec)
 713 {
 714         union {
 715                 struct iphdr *v4;
 716                 struct ipv6hdr *v6;
 717                 unsigned char *hdr;
 718         } l3;
 719         union {
 720                 struct tcphdr *tcp;
 721                 struct udphdr *udp;
 722                 struct gre_base_hdr *gre;
 723                 unsigned char *hdr;
 724         } l4;
 725         unsigned char *l2_hdr;
 726         u8 l4_proto = ol4_proto;
 727         u32 ol2_len;
 728         u32 ol3_len;
 729         u32 ol4_len;
 730         u32 l2_len;
 731         u32 l3_len;
 732
 733         l3.hdr = skb_network_header(skb);
 734         l4.hdr = skb_transport_header(skb);
 735
 736         /* compute L2 header size for normal packet, defined in 2 Bytes */
 737         l2_len = l3.hdr - skb->data;
 738         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 739                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 740
 741         /* tunnel packet*/
 742         if (skb->encapsulation) {
 743                 /* compute OL2 header size, defined in 2 Bytes */
 744                 ol2_len = l2_len;
 745                 hnae3_set_field(*ol_type_vlan_len_msec,
 746                                 HNS3_TXD_L2LEN_M,
 747                                 HNS3_TXD_L2LEN_S, ol2_len >> 1);
 748
 749                 /* compute OL3 header size, defined in 4 Bytes */
 750                 ol3_len = l4.hdr - l3.hdr;
 751                 hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_M,
 752                                 HNS3_TXD_L3LEN_S, ol3_len >> 2);
 753
 754                 /* MAC in UDP, MAC in GRE (0x6558)*/
 755                 if ((ol4_proto == IPPROTO_UDP) || (ol4_proto == IPPROTO_GRE)) {
 756                         /* switch MAC header ptr from outer to inner header.*/
 757                         l2_hdr = skb_inner_mac_header(skb);
 758
 759                         /* compute OL4 header size, defined in 4 Bytes. */
 760                         ol4_len = l2_hdr - l4.hdr;
 761                         hnae3_set_field(*ol_type_vlan_len_msec,
 762                                         HNS3_TXD_L4LEN_M, HNS3_TXD_L4LEN_S,
 763                                         ol4_len >> 2);
 764
 765                         /* switch IP header ptr from outer to inner header */
 766                         l3.hdr = skb_inner_network_header(skb);
 767
 768                         /* compute inner l2 header size, defined in 2 Bytes. */
 769                         l2_len = l3.hdr - l2_hdr;
 770                         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 771                                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 772                 } else {
 773                         /* skb packet types not supported by hardware,
 774                          * txbd len fild doesn't be filled.
 775                          */
 776                         return;
 777                 }
 778
 779                 /* switch L4 header pointer from outer to inner */
 780                 l4.hdr = skb_inner_transport_header(skb);
 781
 782                 l4_proto = il4_proto;
 783         }
 784
 785         /* compute inner(/normal) L3 header size, defined in 4 Bytes */
 786         l3_len = l4.hdr - l3.hdr;
 787         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_M,
 788                         HNS3_TXD_L3LEN_S, l3_len >> 2);
 789
 790         /* compute inner(/normal) L4 header size, defined in 4 Bytes */
 791         switch (l4_proto) {
 792         case IPPROTO_TCP:
 793                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 794                                 HNS3_TXD_L4LEN_S, l4.tcp->doff);
 795                 break;
 796         case IPPROTO_SCTP:
 797                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 798                                 HNS3_TXD_L4LEN_S,
 799                                 (sizeof(struct sctphdr) >> 2));
 800                 break;
 801         case IPPROTO_UDP:
 802                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 803                                 HNS3_TXD_L4LEN_S,
 804                                 (sizeof(struct udphdr) >> 2));
 805                 break;
 806         default:
 807                 /* skb packet types not supported by hardware,
 808                  * txbd len fild doesn't be filled.
 809                  */
 810                 return;
 811         }
 812 }
 813
 814 /* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
 815  * and it is udp packet, which has a dest port as the IANA assigned.
 816  * the hardware is expected to do the checksum offload, but the
 817  * hardware will not do the checksum offload when udp dest port is
 818  * 4789.
 819  */
 820 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 821 {
 822 #define IANA_VXLAN_PORT 4789
 823         union {
 824                 struct tcphdr *tcp;
 825                 struct udphdr *udp;
 826                 struct gre_base_hdr *gre;
 827                 unsigned char *hdr;
 828         } l4;
 829
 830         l4.hdr = skb_transport_header(skb);
 831
 832         if (!(!skb->encapsulation && l4.udp->dest == htons(IANA_VXLAN_PORT)))
 833                 return false;
 834
 835         skb_checksum_help(skb);
 836
 837         return true;
 838 }
 839
 840 static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
 841                                    u8 il4_proto, u32 *type_cs_vlan_tso,
 842                                    u32 *ol_type_vlan_len_msec)
 843 {
 844         union {
 845                 struct iphdr *v4;
 846                 struct ipv6hdr *v6;
 847                 unsigned char *hdr;
 848         } l3;
 849         u32 l4_proto = ol4_proto;
 850
 851         l3.hdr = skb_network_header(skb);
 852
 853         /* define OL3 type and tunnel type(OL4).*/
 854         if (skb->encapsulation) {
 855                 /* define outer network header type.*/
 856                 if (skb->protocol == htons(ETH_P_IP)) {
 857                         if (skb_is_gso(skb))
 858                                 hnae3_set_field(*ol_type_vlan_len_msec,
 859                                                 HNS3_TXD_OL3T_M,
 860                                                 HNS3_TXD_OL3T_S,
 861                                                 HNS3_OL3T_IPV4_CSUM);
 862                         else
 863                                 hnae3_set_field(*ol_type_vlan_len_msec,
 864                                                 HNS3_TXD_OL3T_M,
 865                                                 HNS3_TXD_OL3T_S,
 866                                                 HNS3_OL3T_IPV4_NO_CSUM);
 867
 868                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
 869                         hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_M,
 870                                         HNS3_TXD_OL3T_S, HNS3_OL3T_IPV6);
 871                 }
 872
 873                 /* define tunnel type(OL4).*/
 874                 switch (l4_proto) {
 875                 case IPPROTO_UDP:
 876                         hnae3_set_field(*ol_type_vlan_len_msec,
 877                                         HNS3_TXD_TUNTYPE_M,
 878                                         HNS3_TXD_TUNTYPE_S,
 879                                         HNS3_TUN_MAC_IN_UDP);
 880                         break;
 881                 case IPPROTO_GRE:
 882                         hnae3_set_field(*ol_type_vlan_len_msec,
 883                                         HNS3_TXD_TUNTYPE_M,
 884                                         HNS3_TXD_TUNTYPE_S,
 885                                         HNS3_TUN_NVGRE);
 886                         break;
 887                 default:
 888                         /* drop the skb tunnel packet if hardware don't support,
 889                          * because hardware can't calculate csum when TSO.
 890                          */
 891                         if (skb_is_gso(skb))
 892                                 return -EDOM;
 893
 894                         /* the stack computes the IP header already,
 895                          * driver calculate l4 checksum when not TSO.
 896                          */
 897                         skb_checksum_help(skb);
 898                         return 0;
 899                 }
 900
 901                 l3.hdr = skb_inner_network_header(skb);
 902                 l4_proto = il4_proto;
 903         }
 904
 905         if (l3.v4->version == 4) {
 906                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 907                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV4);
 908
 909                 /* the stack computes the IP header already, the only time we
 910                  * need the hardware to recompute it is in the case of TSO.
 911                  */
 912                 if (skb_is_gso(skb))
 913                         hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
 914         } else if (l3.v6->version == 6) {
 915                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 916                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV6);
 917         }
 918
 919         switch (l4_proto) {
 920         case IPPROTO_TCP:
 921                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 922                 hnae3_set_field(*type_cs_vlan_tso,
 923                                 HNS3_TXD_L4T_M,
 924                                 HNS3_TXD_L4T_S,
 925                                 HNS3_L4T_TCP);
 926                 break;
 927         case IPPROTO_UDP:
 928                 if (hns3_tunnel_csum_bug(skb))
 929                         break;
 930
 931                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 932                 hnae3_set_field(*type_cs_vlan_tso,
 933                                 HNS3_TXD_L4T_M,
 934                                 HNS3_TXD_L4T_S,
 935                                 HNS3_L4T_UDP);
 936                 break;
 937         case IPPROTO_SCTP:
 938                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 939                 hnae3_set_field(*type_cs_vlan_tso,
 940                                 HNS3_TXD_L4T_M,
 941                                 HNS3_TXD_L4T_S,
 942                                 HNS3_L4T_SCTP);
 943                 break;
 944         default:
 945                 /* drop the skb tunnel packet if hardware don't support,
 946                  * because hardware can't calculate csum when TSO.
 947                  */
 948                 if (skb_is_gso(skb))
 949                         return -EDOM;
 950
 951                 /* the stack computes the IP header already,
 952                  * driver calculate l4 checksum when not TSO.
 953                  */
 954                 skb_checksum_help(skb);
 955                 return 0;
 956         }
 957
 958         return 0;
 959 }
 960
 961 static void hns3_set_txbd_baseinfo(u16 *bdtp_fe_sc_vld_ra_ri, int frag_end)
 962 {
 963         /* Config bd buffer end */
 964         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_BDTYPE_M,
 965                         HNS3_TXD_BDTYPE_S, 0);
 966         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_FE_B, !!frag_end);
 967         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_VLD_B, 1);
 968         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_SC_M, HNS3_TXD_SC_S, 0);
 969 }
 970
 971 static int hns3_fill_desc_vtags(struct sk_buff *skb,
 972                                 struct hns3_enet_ring *tx_ring,
 973                                 u32 *inner_vlan_flag,
 974                                 u32 *out_vlan_flag,
 975                                 u16 *inner_vtag,
 976                                 u16 *out_vtag)
 977 {
 978 #define HNS3_TX_VLAN_PRIO_SHIFT 13
 979
 980         if (skb->protocol == htons(ETH_P_8021Q) &&
 981             !(tx_ring->tqp->handle->kinfo.netdev->features &
 982             NETIF_F_HW_VLAN_CTAG_TX)) {
 983                 /* When HW VLAN acceleration is turned off, and the stack
 984                  * sets the protocol to 802.1q, the driver just need to
 985                  * set the protocol to the encapsulated ethertype.
 986                  */
 987                 skb->protocol = vlan_get_protocol(skb);
 988                 return 0;
 989         }
 990
 991         if (skb_vlan_tag_present(skb)) {
 992                 u16 vlan_tag;
 993
 994                 vlan_tag = skb_vlan_tag_get(skb);
 995                 vlan_tag |= (skb->priority & 0x7) << HNS3_TX_VLAN_PRIO_SHIFT;
 996
 997                 /* Based on hw strategy, use out_vtag in two layer tag case,
 998                  * and use inner_vtag in one tag case.
 999                  */
1000                 if (skb->protocol == htons(ETH_P_8021Q)) {
1001                         hnae3_set_bit(*out_vlan_flag, HNS3_TXD_OVLAN_B, 1);
1002                         *out_vtag = vlan_tag;
1003                 } else {
1004                         hnae3_set_bit(*inner_vlan_flag, HNS3_TXD_VLAN_B, 1);
1005                         *inner_vtag = vlan_tag;
1006                 }
1007         } else if (skb->protocol == htons(ETH_P_8021Q)) {
1008                 struct vlan_ethhdr *vhdr;
1009                 int rc;
1010
1011                 rc = skb_cow_head(skb, 0);
1012                 if (rc < 0)
1013                         return rc;
1014                 vhdr = (struct vlan_ethhdr *)skb->data;
1015                 vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority & 0x7)
1016                                         << HNS3_TX_VLAN_PRIO_SHIFT);
1017         }
1018
1019         skb->protocol = vlan_get_protocol(skb);
1020         return 0;
1021 }
1022
1023 static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
1024                           int size, int frag_end, enum hns_desc_type type)
1025 {
1026         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
1027         struct hns3_desc *desc = &ring->desc[ring->next_to_use];
1028         struct device *dev = ring_to_dev(ring);
1029         u32 ol_type_vlan_len_msec = 0;
1030         u16 bdtp_fe_sc_vld_ra_ri = 0;
1031         struct skb_frag_struct *frag;
1032         unsigned int frag_buf_num;
1033         u32 type_cs_vlan_tso = 0;
1034         struct sk_buff *skb;
1035         u16 inner_vtag = 0;
1036         u16 out_vtag = 0;
1037         unsigned int k;
1038         int sizeoflast;
1039         u32 paylen = 0;
1040         dma_addr_t dma;
1041         u16 mss = 0;
1042         u8 ol4_proto;
1043         u8 il4_proto;
1044         int ret;
1045
1046         if (type == DESC_TYPE_SKB) {
1047                 skb = (struct sk_buff *)priv;
1048                 paylen = skb->len;
1049
1050                 ret = hns3_fill_desc_vtags(skb, ring, &type_cs_vlan_tso,
1051                                            &ol_type_vlan_len_msec,
1052                                            &inner_vtag, &out_vtag);
1053                 if (unlikely(ret))
1054                         return ret;
1055
1056                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1057                         skb_reset_mac_len(skb);
1058
1059                         ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
1060                         if (ret)
1061                                 return ret;
1062                         hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
1063                                             &type_cs_vlan_tso,
1064                                             &ol_type_vlan_len_msec);
1065                         ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
1066                                                       &type_cs_vlan_tso,
1067                                                       &ol_type_vlan_len_msec);
1068                         if (ret)
1069                                 return ret;
1070
1071                         ret = hns3_set_tso(skb, &paylen, &mss,
1072                                            &type_cs_vlan_tso);
1073                         if (ret)
1074                                 return ret;
1075                 }
1076
1077                 /* Set txbd */
1078                 desc->tx.ol_type_vlan_len_msec =
1079                         cpu_to_le32(ol_type_vlan_len_msec);
1080                 desc->tx.type_cs_vlan_tso_len =
1081                         cpu_to_le32(type_cs_vlan_tso);
1082                 desc->tx.paylen = cpu_to_le32(paylen);
1083                 desc->tx.mss = cpu_to_le16(mss);
1084                 desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
1085                 desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
1086
1087                 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1088         } else {
1089                 frag = (struct skb_frag_struct *)priv;
1090                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1091         }
1092
1093         if (dma_mapping_error(ring->dev, dma)) {
1094                 ring->stats.sw_err_cnt++;
1095                 return -ENOMEM;
1096         }
1097
1098         desc_cb->length = size;
1099
1100         frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1101         sizeoflast = size % HNS3_MAX_BD_SIZE;
1102         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1103
1104         /* When frag size is bigger than hardware limit, split this frag */
1105         for (k = 0; k < frag_buf_num; k++) {
1106                 /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
1107                 desc_cb->priv = priv;
1108                 desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k;
1109                 desc_cb->type = (type == DESC_TYPE_SKB && !k) ?
1110                                         DESC_TYPE_SKB : DESC_TYPE_PAGE;
1111
1112                 /* now, fill the descriptor */
1113                 desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
1114                 desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
1115                                 (u16)sizeoflast : (u16)HNS3_MAX_BD_SIZE);
1116                 hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri,
1117                                        frag_end && (k == frag_buf_num - 1) ?
1118                                                 1 : 0);
1119                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1120                                 cpu_to_le16(bdtp_fe_sc_vld_ra_ri);
1121
1122                 /* move ring pointer to next.*/
1123                 ring_ptr_move_fw(ring, next_to_use);
1124
1125                 desc_cb = &ring->desc_cb[ring->next_to_use];
1126                 desc = &ring->desc[ring->next_to_use];
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
1133                                    struct hns3_enet_ring *ring)
1134 {
1135         struct sk_buff *skb = *out_skb;
1136         struct skb_frag_struct *frag;
1137         int bdnum_for_frag;
1138         int frag_num;
1139         int buf_num;
1140         int size;
1141         int i;
1142
1143         size = skb_headlen(skb);
1144         buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1145
1146         frag_num = skb_shinfo(skb)->nr_frags;
1147         for (i = 0; i < frag_num; i++) {
1148                 frag = &skb_shinfo(skb)->frags[i];
1149                 size = skb_frag_size(frag);
1150                 bdnum_for_frag =
1151                         (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1152                 if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
1153                         return -ENOMEM;
1154
1155                 buf_num += bdnum_for_frag;
1156         }
1157
1158         if (buf_num > ring_space(ring))
1159                 return -EBUSY;
1160
1161         *bnum = buf_num;
1162         return 0;
1163 }
1164
1165 static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
1166                                   struct hns3_enet_ring *ring)
1167 {
1168         struct sk_buff *skb = *out_skb;
1169         int buf_num;
1170
1171         /* No. of segments (plus a header) */
1172         buf_num = skb_shinfo(skb)->nr_frags + 1;
1173
1174         if (unlikely(ring_space(ring) < buf_num))
1175                 return -EBUSY;
1176
1177         *bnum = buf_num;
1178
1179         return 0;
1180 }
1181
1182 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1183 {
1184         struct device *dev = ring_to_dev(ring);
1185         unsigned int i;
1186
1187         for (i = 0; i < ring->desc_num; i++) {
1188                 /* check if this is where we started */
1189                 if (ring->next_to_use == next_to_use_orig)
1190                         break;
1191
1192                 /* unmap the descriptor dma address */
1193                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1194                         dma_unmap_single(dev,
1195                                          ring->desc_cb[ring->next_to_use].dma,
1196                                         ring->desc_cb[ring->next_to_use].length,
1197                                         DMA_TO_DEVICE);
1198                 else if (ring->desc_cb[ring->next_to_use].length)
1199                         dma_unmap_page(dev,
1200                                        ring->desc_cb[ring->next_to_use].dma,
1201                                        ring->desc_cb[ring->next_to_use].length,
1202                                        DMA_TO_DEVICE);
1203
1204                 ring->desc_cb[ring->next_to_use].length = 0;
1205
1206                 /* rollback one */
1207                 ring_ptr_move_bw(ring, next_to_use);
1208         }
1209 }
1210
1211 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1212 {
1213         struct hns3_nic_priv *priv = netdev_priv(netdev);
1214         struct hns3_nic_ring_data *ring_data =
1215                 &tx_ring_data(priv, skb->queue_mapping);
1216         struct hns3_enet_ring *ring = ring_data->ring;
1217         struct netdev_queue *dev_queue;
1218         struct skb_frag_struct *frag;
1219         int next_to_use_head;
1220         int next_to_use_frag;
1221         int buf_num;
1222         int seg_num;
1223         int size;
1224         int ret;
1225         int i;
1226
1227         /* Prefetch the data used later */
1228         prefetch(skb->data);
1229
1230         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
1231         case -EBUSY:
1232                 u64_stats_update_begin(&ring->syncp);
1233                 ring->stats.tx_busy++;
1234                 u64_stats_update_end(&ring->syncp);
1235
1236                 goto out_net_tx_busy;
1237         case -ENOMEM:
1238                 u64_stats_update_begin(&ring->syncp);
1239                 ring->stats.sw_err_cnt++;
1240                 u64_stats_update_end(&ring->syncp);
1241                 netdev_err(netdev, "no memory to xmit!\n");
1242
1243                 goto out_err_tx_ok;
1244         default:
1245                 break;
1246         }
1247
1248         /* No. of segments (plus a header) */
1249         seg_num = skb_shinfo(skb)->nr_frags + 1;
1250         /* Fill the first part */
1251         size = skb_headlen(skb);
1252
1253         next_to_use_head = ring->next_to_use;
1254
1255         ret = priv->ops.fill_desc(ring, skb, size, seg_num == 1 ? 1 : 0,
1256                                   DESC_TYPE_SKB);
1257         if (ret)
1258                 goto head_fill_err;
1259
1260         next_to_use_frag = ring->next_to_use;
1261         /* Fill the fragments */
1262         for (i = 1; i < seg_num; i++) {
1263                 frag = &skb_shinfo(skb)->frags[i - 1];
1264                 size = skb_frag_size(frag);
1265
1266                 ret = priv->ops.fill_desc(ring, frag, size,
1267                                           seg_num - 1 == i ? 1 : 0,
1268                                           DESC_TYPE_PAGE);
1269
1270                 if (ret)
1271                         goto frag_fill_err;
1272         }
1273
1274         /* Complete translate all packets */
1275         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1276         netdev_tx_sent_queue(dev_queue, skb->len);
1277
1278         wmb(); /* Commit all data before submit */
1279
1280         hnae3_queue_xmit(ring->tqp, buf_num);
1281
1282         return NETDEV_TX_OK;
1283
1284 frag_fill_err:
1285         hns3_clear_desc(ring, next_to_use_frag);
1286
1287 head_fill_err:
1288         hns3_clear_desc(ring, next_to_use_head);
1289
1290 out_err_tx_ok:
1291         dev_kfree_skb_any(skb);
1292         return NETDEV_TX_OK;
1293
1294 out_net_tx_busy:
1295         netif_stop_subqueue(netdev, ring_data->queue_index);
1296         smp_mb(); /* Commit all data before submit */
1297
1298         return NETDEV_TX_BUSY;
1299 }
1300
1301 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1302 {
1303         struct hnae3_handle *h = hns3_get_handle(netdev);
1304         struct sockaddr *mac_addr = p;
1305         int ret;
1306
1307         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1308                 return -EADDRNOTAVAIL;
1309
1310         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1311                 netdev_info(netdev, "already using mac address %pM\n",
1312                             mac_addr->sa_data);
1313                 return 0;
1314         }
1315
1316         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1317         if (ret) {
1318                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1319                 return ret;
1320         }
1321
1322         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1323
1324         return 0;
1325 }
1326
1327 static int hns3_nic_do_ioctl(struct net_device *netdev,
1328                              struct ifreq *ifr, int cmd)
1329 {
1330         struct hnae3_handle *h = hns3_get_handle(netdev);
1331
1332         if (!netif_running(netdev))
1333                 return -EINVAL;
1334
1335         if (!h->ae_algo->ops->do_ioctl)
1336                 return -EOPNOTSUPP;
1337
1338         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1339 }
1340
1341 static int hns3_nic_set_features(struct net_device *netdev,
1342                                  netdev_features_t features)
1343 {
1344         netdev_features_t changed = netdev->features ^ features;
1345         struct hns3_nic_priv *priv = netdev_priv(netdev);
1346         struct hnae3_handle *h = priv->ae_handle;
1347         int ret;
1348
1349         if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1350                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1351                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
1352                 else
1353                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
1354         }
1355
1356         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1357                 if (features & NETIF_F_GRO_HW)
1358                         ret = h->ae_algo->ops->set_gro_en(h, true);
1359                 else
1360                         ret = h->ae_algo->ops->set_gro_en(h, false);
1361                 if (ret)
1362                         return ret;
1363         }
1364
1365         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1366             h->ae_algo->ops->enable_vlan_filter) {
1367                 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1368                         h->ae_algo->ops->enable_vlan_filter(h, true);
1369                 else
1370                         h->ae_algo->ops->enable_vlan_filter(h, false);
1371         }
1372
1373         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1374             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1375                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1376                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, true);
1377                 else
1378                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, false);
1379
1380                 if (ret)
1381                         return ret;
1382         }
1383
1384         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1385                 if (features & NETIF_F_NTUPLE)
1386                         h->ae_algo->ops->enable_fd(h, true);
1387                 else
1388                         h->ae_algo->ops->enable_fd(h, false);
1389         }
1390
1391         netdev->features = features;
1392         return 0;
1393 }
1394
1395 static void hns3_nic_get_stats64(struct net_device *netdev,
1396                                  struct rtnl_link_stats64 *stats)
1397 {
1398         struct hns3_nic_priv *priv = netdev_priv(netdev);
1399         int queue_num = priv->ae_handle->kinfo.num_tqps;
1400         struct hnae3_handle *handle = priv->ae_handle;
1401         struct hns3_enet_ring *ring;
1402         unsigned int start;
1403         unsigned int idx;
1404         u64 tx_bytes = 0;
1405         u64 rx_bytes = 0;
1406         u64 tx_pkts = 0;
1407         u64 rx_pkts = 0;
1408         u64 tx_drop = 0;
1409         u64 rx_drop = 0;
1410
1411         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1412                 return;
1413
1414         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1415
1416         for (idx = 0; idx < queue_num; idx++) {
1417                 /* fetch the tx stats */
1418                 ring = priv->ring_data[idx].ring;
1419                 do {
1420                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1421                         tx_bytes += ring->stats.tx_bytes;
1422                         tx_pkts += ring->stats.tx_pkts;
1423                         tx_drop += ring->stats.tx_busy;
1424                         tx_drop += ring->stats.sw_err_cnt;
1425                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1426
1427                 /* fetch the rx stats */
1428                 ring = priv->ring_data[idx + queue_num].ring;
1429                 do {
1430                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1431                         rx_bytes += ring->stats.rx_bytes;
1432                         rx_pkts += ring->stats.rx_pkts;
1433                         rx_drop += ring->stats.non_vld_descs;
1434                         rx_drop += ring->stats.err_pkt_len;
1435                         rx_drop += ring->stats.l2_err;
1436                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1437         }
1438
1439         stats->tx_bytes = tx_bytes;
1440         stats->tx_packets = tx_pkts;
1441         stats->rx_bytes = rx_bytes;
1442         stats->rx_packets = rx_pkts;
1443
1444         stats->rx_errors = netdev->stats.rx_errors;
1445         stats->multicast = netdev->stats.multicast;
1446         stats->rx_length_errors = netdev->stats.rx_length_errors;
1447         stats->rx_crc_errors = netdev->stats.rx_crc_errors;
1448         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1449
1450         stats->tx_errors = netdev->stats.tx_errors;
1451         stats->rx_dropped = rx_drop + netdev->stats.rx_dropped;
1452         stats->tx_dropped = tx_drop + netdev->stats.tx_dropped;
1453         stats->collisions = netdev->stats.collisions;
1454         stats->rx_over_errors = netdev->stats.rx_over_errors;
1455         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1456         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1457         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1458         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1459         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1460         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1461         stats->tx_window_errors = netdev->stats.tx_window_errors;
1462         stats->rx_compressed = netdev->stats.rx_compressed;
1463         stats->tx_compressed = netdev->stats.tx_compressed;
1464 }
1465
1466 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1467 {
1468         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1469         struct hnae3_handle *h = hns3_get_handle(netdev);
1470         struct hnae3_knic_private_info *kinfo = &h->kinfo;
1471         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1472         u8 tc = mqprio_qopt->qopt.num_tc;
1473         u16 mode = mqprio_qopt->mode;
1474         u8 hw = mqprio_qopt->qopt.hw;
1475         bool if_running;
1476         int ret;
1477
1478         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1479                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1480                 return -EOPNOTSUPP;
1481
1482         if (tc > HNAE3_MAX_TC)
1483                 return -EINVAL;
1484
1485         if (!netdev)
1486                 return -EINVAL;
1487
1488         if_running = netif_running(netdev);
1489         if (if_running) {
1490                 hns3_nic_net_stop(netdev);
1491                 msleep(100);
1492         }
1493
1494         ret = (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1495                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1496         if (ret)
1497                 goto out;
1498
1499         ret = hns3_nic_set_real_num_queue(netdev);
1500
1501 out:
1502         if (if_running)
1503                 hns3_nic_net_open(netdev);
1504
1505         return ret;
1506 }
1507
1508 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1509                              void *type_data)
1510 {
1511         if (type != TC_SETUP_QDISC_MQPRIO)
1512                 return -EOPNOTSUPP;
1513
1514         return hns3_setup_tc(dev, type_data);
1515 }
1516
1517 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1518                                 __be16 proto, u16 vid)
1519 {
1520         struct hnae3_handle *h = hns3_get_handle(netdev);
1521         struct hns3_nic_priv *priv = netdev_priv(netdev);
1522         int ret = -EIO;
1523
1524         if (h->ae_algo->ops->set_vlan_filter)
1525                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1526
1527         if (!ret)
1528                 set_bit(vid, priv->active_vlans);
1529
1530         return ret;
1531 }
1532
1533 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1534                                  __be16 proto, u16 vid)
1535 {
1536         struct hnae3_handle *h = hns3_get_handle(netdev);
1537         struct hns3_nic_priv *priv = netdev_priv(netdev);
1538         int ret = -EIO;
1539
1540         if (h->ae_algo->ops->set_vlan_filter)
1541                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1542
1543         if (!ret)
1544                 clear_bit(vid, priv->active_vlans);
1545
1546         return ret;
1547 }
1548
1549 static int hns3_restore_vlan(struct net_device *netdev)
1550 {
1551         struct hns3_nic_priv *priv = netdev_priv(netdev);
1552         int ret = 0;
1553         u16 vid;
1554
1555         for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
1556                 ret = hns3_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
1557                 if (ret) {
1558                         netdev_err(netdev, "Restore vlan: %d filter, ret:%d\n",
1559                                    vid, ret);
1560                         return ret;
1561                 }
1562         }
1563
1564         return ret;
1565 }
1566
1567 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1568                                 u8 qos, __be16 vlan_proto)
1569 {
1570         struct hnae3_handle *h = hns3_get_handle(netdev);
1571         int ret = -EIO;
1572
1573         if (h->ae_algo->ops->set_vf_vlan_filter)
1574                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1575                                                    qos, vlan_proto);
1576
1577         return ret;
1578 }
1579
1580 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1581 {
1582         struct hnae3_handle *h = hns3_get_handle(netdev);
1583         int ret;
1584
1585         if (!h->ae_algo->ops->set_mtu)
1586                 return -EOPNOTSUPP;
1587
1588         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1589         if (ret)
1590                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1591                            ret);
1592         else
1593                 netdev->mtu = new_mtu;
1594
1595         return ret;
1596 }
1597
1598 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1599 {
1600         struct hns3_nic_priv *priv = netdev_priv(ndev);
1601         struct hns3_enet_ring *tx_ring = NULL;
1602         int timeout_queue = 0;
1603         int hw_head, hw_tail;
1604         int i;
1605
1606         /* Find the stopped queue the same way the stack does */
1607         for (i = 0; i < ndev->real_num_tx_queues; i++) {
1608                 struct netdev_queue *q;
1609                 unsigned long trans_start;
1610
1611                 q = netdev_get_tx_queue(ndev, i);
1612                 trans_start = q->trans_start;
1613                 if (netif_xmit_stopped(q) &&
1614                     time_after(jiffies,
1615                                (trans_start + ndev->watchdog_timeo))) {
1616                         timeout_queue = i;
1617                         break;
1618                 }
1619         }
1620
1621         if (i == ndev->num_tx_queues) {
1622                 netdev_info(ndev,
1623                             "no netdev TX timeout queue found, timeout count: %llu\n",
1624                             priv->tx_timeout_count);
1625                 return false;
1626         }
1627
1628         tx_ring = priv->ring_data[timeout_queue].ring;
1629
1630         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1631                                 HNS3_RING_TX_RING_HEAD_REG);
1632         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1633                                 HNS3_RING_TX_RING_TAIL_REG);
1634         netdev_info(ndev,
1635                     "tx_timeout count: %llu, queue id: %d, SW_NTU: 0x%x, SW_NTC: 0x%x, HW_HEAD: 0x%x, HW_TAIL: 0x%x, INT: 0x%x\n",
1636                     priv->tx_timeout_count,
1637                     timeout_queue,
1638                     tx_ring->next_to_use,
1639                     tx_ring->next_to_clean,
1640                     hw_head,
1641                     hw_tail,
1642                     readl(tx_ring->tqp_vector->mask_addr));
1643
1644         return true;
1645 }
1646
1647 static void hns3_nic_net_timeout(struct net_device *ndev)
1648 {
1649         struct hns3_nic_priv *priv = netdev_priv(ndev);
1650         struct hnae3_handle *h = priv->ae_handle;
1651
1652         if (!hns3_get_tx_timeo_queue_info(ndev))
1653                 return;
1654
1655         priv->tx_timeout_count++;
1656
1657         /* request the reset, and let the hclge to determine
1658          * which reset level should be done
1659          */
1660         if (h->ae_algo->ops->reset_event)
1661                 h->ae_algo->ops->reset_event(h->pdev, h);
1662 }
1663
1664 static const struct net_device_ops hns3_nic_netdev_ops = {
1665         .ndo_open               = hns3_nic_net_open,
1666         .ndo_stop               = hns3_nic_net_stop,
1667         .ndo_start_xmit         = hns3_nic_net_xmit,
1668         .ndo_tx_timeout         = hns3_nic_net_timeout,
1669         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1670         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1671         .ndo_change_mtu         = hns3_nic_change_mtu,
1672         .ndo_set_features       = hns3_nic_set_features,
1673         .ndo_get_stats64        = hns3_nic_get_stats64,
1674         .ndo_setup_tc           = hns3_nic_setup_tc,
1675         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1676         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1677         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1678         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1679 };
1680
1681 static bool hns3_is_phys_func(struct pci_dev *pdev)
1682 {
1683         u32 dev_id = pdev->device;
1684
1685         switch (dev_id) {
1686         case HNAE3_DEV_ID_GE:
1687         case HNAE3_DEV_ID_25GE:
1688         case HNAE3_DEV_ID_25GE_RDMA:
1689         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1690         case HNAE3_DEV_ID_50GE_RDMA:
1691         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1692         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1693                 return true;
1694         case HNAE3_DEV_ID_100G_VF:
1695         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
1696                 return false;
1697         default:
1698                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
1699                          dev_id);
1700         }
1701
1702         return false;
1703 }
1704
1705 static void hns3_disable_sriov(struct pci_dev *pdev)
1706 {
1707         /* If our VFs are assigned we cannot shut down SR-IOV
1708          * without causing issues, so just leave the hardware
1709          * available but disabled
1710          */
1711         if (pci_vfs_assigned(pdev)) {
1712                 dev_warn(&pdev->dev,
1713                          "disabling driver while VFs are assigned\n");
1714                 return;
1715         }
1716
1717         pci_disable_sriov(pdev);
1718 }
1719
1720 static void hns3_get_dev_capability(struct pci_dev *pdev,
1721                                     struct hnae3_ae_dev *ae_dev)
1722 {
1723         if (pdev->revision >= 0x21) {
1724                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
1725                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
1726         }
1727 }
1728
1729 /* hns3_probe - Device initialization routine
1730  * @pdev: PCI device information struct
1731  * @ent: entry in hns3_pci_tbl
1732  *
1733  * hns3_probe initializes a PF identified by a pci_dev structure.
1734  * The OS initialization, configuring of the PF private structure,
1735  * and a hardware reset occur.
1736  *
1737  * Returns 0 on success, negative on failure
1738  */
1739 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1740 {
1741         struct hnae3_ae_dev *ae_dev;
1742         int ret;
1743
1744         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
1745                               GFP_KERNEL);
1746         if (!ae_dev) {
1747                 ret = -ENOMEM;
1748                 return ret;
1749         }
1750
1751         ae_dev->pdev = pdev;
1752         ae_dev->flag = ent->driver_data;
1753         ae_dev->dev_type = HNAE3_DEV_KNIC;
1754         ae_dev->reset_type = HNAE3_NONE_RESET;
1755         hns3_get_dev_capability(pdev, ae_dev);
1756         pci_set_drvdata(pdev, ae_dev);
1757
1758         hnae3_register_ae_dev(ae_dev);
1759
1760         return 0;
1761 }
1762
1763 /* hns3_remove - Device removal routine
1764  * @pdev: PCI device information struct
1765  */
1766 static void hns3_remove(struct pci_dev *pdev)
1767 {
1768         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1769
1770         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
1771                 hns3_disable_sriov(pdev);
1772
1773         hnae3_unregister_ae_dev(ae_dev);
1774 }
1775
1776 /**
1777  * hns3_pci_sriov_configure
1778  * @pdev: pointer to a pci_dev structure
1779  * @num_vfs: number of VFs to allocate
1780  *
1781  * Enable or change the number of VFs. Called when the user updates the number
1782  * of VFs in sysfs.
1783  **/
1784 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
1785 {
1786         int ret;
1787
1788         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
1789                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
1790                 return -EINVAL;
1791         }
1792
1793         if (num_vfs) {
1794                 ret = pci_enable_sriov(pdev, num_vfs);
1795                 if (ret)
1796                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
1797                 else
1798                         return num_vfs;
1799         } else if (!pci_vfs_assigned(pdev)) {
1800                 pci_disable_sriov(pdev);
1801         } else {
1802                 dev_warn(&pdev->dev,
1803                          "Unable to free VFs because some are assigned to VMs.\n");
1804         }
1805
1806         return 0;
1807 }
1808
1809 static void hns3_shutdown(struct pci_dev *pdev)
1810 {
1811         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1812
1813         hnae3_unregister_ae_dev(ae_dev);
1814         devm_kfree(&pdev->dev, ae_dev);
1815         pci_set_drvdata(pdev, NULL);
1816
1817         if (system_state == SYSTEM_POWER_OFF)
1818                 pci_set_power_state(pdev, PCI_D3hot);
1819 }
1820
1821 static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
1822                                             pci_channel_state_t state)
1823 {
1824         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1825         pci_ers_result_t ret;
1826
1827         dev_info(&pdev->dev, "PCI error detected, state(=%d)!!\n", state);
1828
1829         if (state == pci_channel_io_perm_failure)
1830                 return PCI_ERS_RESULT_DISCONNECT;
1831
1832         if (!ae_dev) {
1833                 dev_err(&pdev->dev,
1834                         "Can't recover - error happened during device init\n");
1835                 return PCI_ERS_RESULT_NONE;
1836         }
1837
1838         if (ae_dev->ops->handle_hw_ras_error)
1839                 ret = ae_dev->ops->handle_hw_ras_error(ae_dev);
1840         else
1841                 return PCI_ERS_RESULT_NONE;
1842
1843         return ret;
1844 }
1845
1846 static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
1847 {
1848         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1849         struct device *dev = &pdev->dev;
1850
1851         dev_info(dev, "requesting reset due to PCI error\n");
1852
1853         /* request the reset */
1854         if (ae_dev->ops->reset_event) {
1855                 ae_dev->ops->reset_event(pdev, NULL);
1856                 return PCI_ERS_RESULT_RECOVERED;
1857         }
1858
1859         return PCI_ERS_RESULT_DISCONNECT;
1860 }
1861
1862 static void hns3_reset_prepare(struct pci_dev *pdev)
1863 {
1864         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1865
1866         dev_info(&pdev->dev, "hns3 flr prepare\n");
1867         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_prepare)
1868                 ae_dev->ops->flr_prepare(ae_dev);
1869 }
1870
1871 static void hns3_reset_done(struct pci_dev *pdev)
1872 {
1873         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1874
1875         dev_info(&pdev->dev, "hns3 flr done\n");
1876         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_done)
1877                 ae_dev->ops->flr_done(ae_dev);
1878 }
1879
1880 static const struct pci_error_handlers hns3_err_handler = {
1881         .error_detected = hns3_error_detected,
1882         .slot_reset     = hns3_slot_reset,
1883         .reset_prepare  = hns3_reset_prepare,
1884         .reset_done     = hns3_reset_done,
1885 };
1886
1887 static struct pci_driver hns3_driver = {
1888         .name     = hns3_driver_name,
1889         .id_table = hns3_pci_tbl,
1890         .probe    = hns3_probe,
1891         .remove   = hns3_remove,
1892         .shutdown = hns3_shutdown,
1893         .sriov_configure = hns3_pci_sriov_configure,
1894         .err_handler    = &hns3_err_handler,
1895 };
1896
1897 /* set default feature to hns3 */
1898 static void hns3_set_default_feature(struct net_device *netdev)
1899 {
1900         struct hnae3_handle *h = hns3_get_handle(netdev);
1901         struct pci_dev *pdev = h->pdev;
1902
1903         netdev->priv_flags |= IFF_UNICAST_FLT;
1904
1905         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1906                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1907                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1908                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1909                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1910
1911         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
1912
1913         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
1914
1915         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1916                 NETIF_F_HW_VLAN_CTAG_FILTER |
1917                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1918                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1919                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1920                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1921                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1922
1923         netdev->vlan_features |=
1924                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
1925                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
1926                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1927                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1928                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1929
1930         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1931                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1932                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1933                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1934                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1935                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1936
1937         if (pdev->revision >= 0x21) {
1938                 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1939                         NETIF_F_GRO_HW;
1940                 netdev->features |= NETIF_F_GRO_HW;
1941
1942                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
1943                         netdev->hw_features |= NETIF_F_NTUPLE;
1944                         netdev->features |= NETIF_F_NTUPLE;
1945                 }
1946         }
1947 }
1948
1949 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
1950                              struct hns3_desc_cb *cb)
1951 {
1952         unsigned int order = hnae3_page_order(ring);
1953         struct page *p;
1954
1955         p = dev_alloc_pages(order);
1956         if (!p)
1957                 return -ENOMEM;
1958
1959         cb->priv = p;
1960         cb->page_offset = 0;
1961         cb->reuse_flag = 0;
1962         cb->buf  = page_address(p);
1963         cb->length = hnae3_page_size(ring);
1964         cb->type = DESC_TYPE_PAGE;
1965
1966         return 0;
1967 }
1968
1969 static void hns3_free_buffer(struct hns3_enet_ring *ring,
1970                              struct hns3_desc_cb *cb)
1971 {
1972         if (cb->type == DESC_TYPE_SKB)
1973                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
1974         else if (!HNAE3_IS_TX_RING(ring))
1975                 put_page((struct page *)cb->priv);
1976         memset(cb, 0, sizeof(*cb));
1977 }
1978
1979 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
1980 {
1981         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
1982                                cb->length, ring_to_dma_dir(ring));
1983
1984         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
1985                 return -EIO;
1986
1987         return 0;
1988 }
1989
1990 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
1991                               struct hns3_desc_cb *cb)
1992 {
1993         if (cb->type == DESC_TYPE_SKB)
1994                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
1995                                  ring_to_dma_dir(ring));
1996         else if (cb->length)
1997                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
1998                                ring_to_dma_dir(ring));
1999 }
2000
2001 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2002 {
2003         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2004         ring->desc[i].addr = 0;
2005 }
2006
2007 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2008 {
2009         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2010
2011         if (!ring->desc_cb[i].dma)
2012                 return;
2013
2014         hns3_buffer_detach(ring, i);
2015         hns3_free_buffer(ring, cb);
2016 }
2017
2018 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2019 {
2020         int i;
2021
2022         for (i = 0; i < ring->desc_num; i++)
2023                 hns3_free_buffer_detach(ring, i);
2024 }
2025
2026 /* free desc along with its attached buffer */
2027 static void hns3_free_desc(struct hns3_enet_ring *ring)
2028 {
2029         int size = ring->desc_num * sizeof(ring->desc[0]);
2030
2031         hns3_free_buffers(ring);
2032
2033         if (ring->desc) {
2034                 dma_free_coherent(ring_to_dev(ring), size,
2035                                   ring->desc, ring->desc_dma_addr);
2036                 ring->desc = NULL;
2037         }
2038 }
2039
2040 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2041 {
2042         int size = ring->desc_num * sizeof(ring->desc[0]);
2043
2044         ring->desc = dma_zalloc_coherent(ring_to_dev(ring), size,
2045                                          &ring->desc_dma_addr,
2046                                          GFP_KERNEL);
2047         if (!ring->desc)
2048                 return -ENOMEM;
2049
2050         return 0;
2051 }
2052
2053 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2054                                    struct hns3_desc_cb *cb)
2055 {
2056         int ret;
2057
2058         ret = hns3_alloc_buffer(ring, cb);
2059         if (ret)
2060                 goto out;
2061
2062         ret = hns3_map_buffer(ring, cb);
2063         if (ret)
2064                 goto out_with_buf;
2065
2066         return 0;
2067
2068 out_with_buf:
2069         hns3_free_buffer(ring, cb);
2070 out:
2071         return ret;
2072 }
2073
2074 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2075 {
2076         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2077
2078         if (ret)
2079                 return ret;
2080
2081         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2082
2083         return 0;
2084 }
2085
2086 /* Allocate memory for raw pkg, and map with dma */
2087 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2088 {
2089         int i, j, ret;
2090
2091         for (i = 0; i < ring->desc_num; i++) {
2092                 ret = hns3_alloc_buffer_attach(ring, i);
2093                 if (ret)
2094                         goto out_buffer_fail;
2095         }
2096
2097         return 0;
2098
2099 out_buffer_fail:
2100         for (j = i - 1; j >= 0; j--)
2101                 hns3_free_buffer_detach(ring, j);
2102         return ret;
2103 }
2104
2105 /* detach a in-used buffer and replace with a reserved one  */
2106 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2107                                 struct hns3_desc_cb *res_cb)
2108 {
2109         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2110         ring->desc_cb[i] = *res_cb;
2111         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2112         ring->desc[i].rx.bd_base_info = 0;
2113 }
2114
2115 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2116 {
2117         ring->desc_cb[i].reuse_flag = 0;
2118         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
2119                 + ring->desc_cb[i].page_offset);
2120         ring->desc[i].rx.bd_base_info = 0;
2121 }
2122
2123 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
2124                                       int *pkts)
2125 {
2126         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2127
2128         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2129         (*bytes) += desc_cb->length;
2130         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
2131         hns3_free_buffer_detach(ring, ring->next_to_clean);
2132
2133         ring_ptr_move_fw(ring, next_to_clean);
2134 }
2135
2136 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2137 {
2138         int u = ring->next_to_use;
2139         int c = ring->next_to_clean;
2140
2141         if (unlikely(h > ring->desc_num))
2142                 return 0;
2143
2144         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2145 }
2146
2147 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2148 {
2149         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2150         struct hns3_nic_priv *priv = netdev_priv(netdev);
2151         struct netdev_queue *dev_queue;
2152         int bytes, pkts;
2153         int head;
2154
2155         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2156         rmb(); /* Make sure head is ready before touch any data */
2157
2158         if (is_ring_empty(ring) || head == ring->next_to_clean)
2159                 return; /* no data to poll */
2160
2161         if (unlikely(!is_valid_clean_head(ring, head))) {
2162                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2163                            ring->next_to_use, ring->next_to_clean);
2164
2165                 u64_stats_update_begin(&ring->syncp);
2166                 ring->stats.io_err_cnt++;
2167                 u64_stats_update_end(&ring->syncp);
2168                 return;
2169         }
2170
2171         bytes = 0;
2172         pkts = 0;
2173         while (head != ring->next_to_clean) {
2174                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2175                 /* Issue prefetch for next Tx descriptor */
2176                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2177         }
2178
2179         ring->tqp_vector->tx_group.total_bytes += bytes;
2180         ring->tqp_vector->tx_group.total_packets += pkts;
2181
2182         u64_stats_update_begin(&ring->syncp);
2183         ring->stats.tx_bytes += bytes;
2184         ring->stats.tx_pkts += pkts;
2185         u64_stats_update_end(&ring->syncp);
2186
2187         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2188         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2189
2190         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2191                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2192                 /* Make sure that anybody stopping the queue after this
2193                  * sees the new next_to_clean.
2194                  */
2195                 smp_mb();
2196                 if (netif_tx_queue_stopped(dev_queue) &&
2197                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2198                         netif_tx_wake_queue(dev_queue);
2199                         ring->stats.restart_queue++;
2200                 }
2201         }
2202 }
2203
2204 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2205 {
2206         int ntc = ring->next_to_clean;
2207         int ntu = ring->next_to_use;
2208
2209         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2210 }
2211
2212 static void
2213 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2214 {
2215         struct hns3_desc_cb *desc_cb;
2216         struct hns3_desc_cb res_cbs;
2217         int i, ret;
2218
2219         for (i = 0; i < cleand_count; i++) {
2220                 desc_cb = &ring->desc_cb[ring->next_to_use];
2221                 if (desc_cb->reuse_flag) {
2222                         u64_stats_update_begin(&ring->syncp);
2223                         ring->stats.reuse_pg_cnt++;
2224                         u64_stats_update_end(&ring->syncp);
2225
2226                         hns3_reuse_buffer(ring, ring->next_to_use);
2227                 } else {
2228                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2229                         if (ret) {
2230                                 u64_stats_update_begin(&ring->syncp);
2231                                 ring->stats.sw_err_cnt++;
2232                                 u64_stats_update_end(&ring->syncp);
2233
2234                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2235                                            "hnae reserve buffer map failed.\n");
2236                                 break;
2237                         }
2238                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2239                 }
2240
2241                 ring_ptr_move_fw(ring, next_to_use);
2242         }
2243
2244         wmb(); /* Make all data has been write before submit */
2245         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2246 }
2247
2248 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2249                                 struct hns3_enet_ring *ring, int pull_len,
2250                                 struct hns3_desc_cb *desc_cb)
2251 {
2252         struct hns3_desc *desc;
2253         u32 truesize;
2254         int size;
2255         int last_offset;
2256         bool twobufs;
2257
2258         twobufs = ((PAGE_SIZE < 8192) &&
2259                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2260
2261         desc = &ring->desc[ring->next_to_clean];
2262         size = le16_to_cpu(desc->rx.size);
2263
2264         truesize = hnae3_buf_size(ring);
2265
2266         if (!twobufs)
2267                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2268
2269         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2270                         size - pull_len, truesize);
2271
2272          /* Avoid re-using remote pages,flag default unreuse */
2273         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2274                 return;
2275
2276         if (twobufs) {
2277                 /* If we are only owner of page we can reuse it */
2278                 if (likely(page_count(desc_cb->priv) == 1)) {
2279                         /* Flip page offset to other buffer */
2280                         desc_cb->page_offset ^= truesize;
2281
2282                         desc_cb->reuse_flag = 1;
2283                         /* bump ref count on page before it is given*/
2284                         get_page(desc_cb->priv);
2285                 }
2286                 return;
2287         }
2288
2289         /* Move offset up to the next cache line */
2290         desc_cb->page_offset += truesize;
2291
2292         if (desc_cb->page_offset <= last_offset) {
2293                 desc_cb->reuse_flag = 1;
2294                 /* Bump ref count on page before it is given*/
2295                 get_page(desc_cb->priv);
2296         }
2297 }
2298
2299 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2300                              struct hns3_desc *desc)
2301 {
2302         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2303         int l3_type, l4_type;
2304         u32 bd_base_info;
2305         int ol4_type;
2306         u32 l234info;
2307
2308         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2309         l234info = le32_to_cpu(desc->rx.l234_info);
2310
2311         skb->ip_summed = CHECKSUM_NONE;
2312
2313         skb_checksum_none_assert(skb);
2314
2315         if (!(netdev->features & NETIF_F_RXCSUM))
2316                 return;
2317
2318         /* We MUST enable hardware checksum before enabling hardware GRO */
2319         if (skb_shinfo(skb)->gso_size) {
2320                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2321                 return;
2322         }
2323
2324         /* check if hardware has done checksum */
2325         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2326                 return;
2327
2328         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2329                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2330                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2331                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2332                 u64_stats_update_begin(&ring->syncp);
2333                 ring->stats.l3l4_csum_err++;
2334                 u64_stats_update_end(&ring->syncp);
2335
2336                 return;
2337         }
2338
2339         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2340                                   HNS3_RXD_L3ID_S);
2341         l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2342                                   HNS3_RXD_L4ID_S);
2343
2344         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2345                                    HNS3_RXD_OL4ID_S);
2346         switch (ol4_type) {
2347         case HNS3_OL4_TYPE_MAC_IN_UDP:
2348         case HNS3_OL4_TYPE_NVGRE:
2349                 skb->csum_level = 1;
2350                 /* fall through */
2351         case HNS3_OL4_TYPE_NO_TUN:
2352                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2353                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2354                      l3_type == HNS3_L3_TYPE_IPV6) &&
2355                     (l4_type == HNS3_L4_TYPE_UDP ||
2356                      l4_type == HNS3_L4_TYPE_TCP ||
2357                      l4_type == HNS3_L4_TYPE_SCTP))
2358                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2359                 break;
2360         default:
2361                 break;
2362         }
2363 }
2364
2365 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2366 {
2367         if (skb_has_frag_list(skb))
2368                 napi_gro_flush(&ring->tqp_vector->napi, false);
2369
2370         napi_gro_receive(&ring->tqp_vector->napi, skb);
2371 }
2372
2373 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2374                                 struct hns3_desc *desc, u32 l234info,
2375                                 u16 *vlan_tag)
2376 {
2377         struct pci_dev *pdev = ring->tqp->handle->pdev;
2378
2379         if (pdev->revision == 0x20) {
2380                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2381                 if (!(*vlan_tag & VLAN_VID_MASK))
2382                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2383
2384                 return (*vlan_tag != 0);
2385         }
2386
2387 #define HNS3_STRP_OUTER_VLAN    0x1
2388 #define HNS3_STRP_INNER_VLAN    0x2
2389
2390         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2391                                 HNS3_RXD_STRP_TAGP_S)) {
2392         case HNS3_STRP_OUTER_VLAN:
2393                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2394                 return true;
2395         case HNS3_STRP_INNER_VLAN:
2396                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2397                 return true;
2398         default:
2399                 return false;
2400         }
2401 }
2402
2403 static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
2404                           unsigned char *va)
2405 {
2406 #define HNS3_NEED_ADD_FRAG      1
2407         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2408         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2409         struct sk_buff *skb;
2410
2411         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2412         skb = ring->skb;
2413         if (unlikely(!skb)) {
2414                 netdev_err(netdev, "alloc rx skb fail\n");
2415
2416                 u64_stats_update_begin(&ring->syncp);
2417                 ring->stats.sw_err_cnt++;
2418                 u64_stats_update_end(&ring->syncp);
2419
2420                 return -ENOMEM;
2421         }
2422
2423         prefetchw(skb->data);
2424
2425         ring->pending_buf = 1;
2426         ring->frag_num = 0;
2427         ring->tail_skb = NULL;
2428         if (length <= HNS3_RX_HEAD_SIZE) {
2429                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2430
2431                 /* We can reuse buffer as-is, just make sure it is local */
2432                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2433                         desc_cb->reuse_flag = 1;
2434                 else /* This page cannot be reused so discard it */
2435                         put_page(desc_cb->priv);
2436
2437                 ring_ptr_move_fw(ring, next_to_clean);
2438                 return 0;
2439         }
2440         u64_stats_update_begin(&ring->syncp);
2441         ring->stats.seg_pkt_cnt++;
2442         u64_stats_update_end(&ring->syncp);
2443
2444         ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2445         __skb_put(skb, ring->pull_len);
2446         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2447                             desc_cb);
2448         ring_ptr_move_fw(ring, next_to_clean);
2449
2450         return HNS3_NEED_ADD_FRAG;
2451 }
2452
2453 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2454                          struct sk_buff **out_skb, bool pending)
2455 {
2456         struct sk_buff *skb = *out_skb;
2457         struct sk_buff *head_skb = *out_skb;
2458         struct sk_buff *new_skb;
2459         struct hns3_desc_cb *desc_cb;
2460         struct hns3_desc *pre_desc;
2461         u32 bd_base_info;
2462         int pre_bd;
2463
2464         /* if there is pending bd, the SW param next_to_clean has moved
2465          * to next and the next is NULL
2466          */
2467         if (pending) {
2468                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2469                         ring->desc_num;
2470                 pre_desc = &ring->desc[pre_bd];
2471                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2472         } else {
2473                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2474         }
2475
2476         while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2477                 desc = &ring->desc[ring->next_to_clean];
2478                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2479                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2480                 if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
2481                         return -ENXIO;
2482
2483                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2484                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2485                                                  HNS3_RX_HEAD_SIZE);
2486                         if (unlikely(!new_skb)) {
2487                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2488                                            "alloc rx skb frag fail\n");
2489                                 return -ENXIO;
2490                         }
2491                         ring->frag_num = 0;
2492
2493                         if (ring->tail_skb) {
2494                                 ring->tail_skb->next = new_skb;
2495                                 ring->tail_skb = new_skb;
2496                         } else {
2497                                 skb_shinfo(skb)->frag_list = new_skb;
2498                                 ring->tail_skb = new_skb;
2499                         }
2500                 }
2501
2502                 if (ring->tail_skb) {
2503                         head_skb->truesize += hnae3_buf_size(ring);
2504                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2505                         head_skb->len += le16_to_cpu(desc->rx.size);
2506                         skb = ring->tail_skb;
2507                 }
2508
2509                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2510                 ring_ptr_move_fw(ring, next_to_clean);
2511                 ring->pending_buf++;
2512         }
2513
2514         return 0;
2515 }
2516
2517 static void hns3_set_gro_param(struct sk_buff *skb, u32 l234info,
2518                                u32 bd_base_info)
2519 {
2520         u16 gro_count;
2521         u32 l3_type;
2522
2523         gro_count = hnae3_get_field(l234info, HNS3_RXD_GRO_COUNT_M,
2524                                     HNS3_RXD_GRO_COUNT_S);
2525         /* if there is no HW GRO, do not set gro params */
2526         if (!gro_count)
2527                 return;
2528
2529         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
2530          * to skb_shinfo(skb)->gso_segs
2531          */
2532         NAPI_GRO_CB(skb)->count = gro_count;
2533
2534         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2535                                   HNS3_RXD_L3ID_S);
2536         if (l3_type == HNS3_L3_TYPE_IPV4)
2537                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2538         else if (l3_type == HNS3_L3_TYPE_IPV6)
2539                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2540         else
2541                 return;
2542
2543         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2544                                                     HNS3_RXD_GRO_SIZE_M,
2545                                                     HNS3_RXD_GRO_SIZE_S);
2546         if (skb_shinfo(skb)->gso_size)
2547                 tcp_gro_complete(skb);
2548 }
2549
2550 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2551                                      struct sk_buff *skb)
2552 {
2553         struct hnae3_handle *handle = ring->tqp->handle;
2554         enum pkt_hash_types rss_type;
2555         struct hns3_desc *desc;
2556         int last_bd;
2557
2558         /* When driver handle the rss type, ring->next_to_clean indicates the
2559          * first descriptor of next packet, need -1 here.
2560          */
2561         last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
2562         desc = &ring->desc[last_bd];
2563
2564         if (le32_to_cpu(desc->rx.rss_hash))
2565                 rss_type = handle->kinfo.rss_type;
2566         else
2567                 rss_type = PKT_HASH_TYPE_NONE;
2568
2569         skb_set_hash(skb, le32_to_cpu(desc->rx.rss_hash), rss_type);
2570 }
2571
2572 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2573                              struct sk_buff **out_skb)
2574 {
2575         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2576         struct sk_buff *skb = ring->skb;
2577         struct hns3_desc_cb *desc_cb;
2578         struct hns3_desc *desc;
2579         u32 bd_base_info;
2580         u32 l234info;
2581         int length;
2582         int ret;
2583
2584         desc = &ring->desc[ring->next_to_clean];
2585         desc_cb = &ring->desc_cb[ring->next_to_clean];
2586
2587         prefetch(desc);
2588
2589         length = le16_to_cpu(desc->rx.size);
2590         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2591
2592         /* Check valid BD */
2593         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2594                 return -ENXIO;
2595
2596         if (!skb)
2597                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2598
2599         /* Prefetch first cache line of first page
2600          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2601          * line size is 64B so need to prefetch twice to make it 128B. But in
2602          * actual we can have greater size of caches with 128B Level 1 cache
2603          * lines. In such a case, single fetch would suffice to cache in the
2604          * relevant part of the header.
2605          */
2606         prefetch(ring->va);
2607 #if L1_CACHE_BYTES < 128
2608         prefetch(ring->va + L1_CACHE_BYTES);
2609 #endif
2610
2611         if (!skb) {
2612                 ret = hns3_alloc_skb(ring, length, ring->va);
2613                 *out_skb = skb = ring->skb;
2614
2615                 if (ret < 0) /* alloc buffer fail */
2616                         return ret;
2617                 if (ret > 0) { /* need add frag */
2618                         ret = hns3_add_frag(ring, desc, &skb, false);
2619                         if (ret)
2620                                 return ret;
2621
2622                         /* As the head data may be changed when GRO enable, copy
2623                          * the head data in after other data rx completed
2624                          */
2625                         memcpy(skb->data, ring->va,
2626                                ALIGN(ring->pull_len, sizeof(long)));
2627                 }
2628         } else {
2629                 ret = hns3_add_frag(ring, desc, &skb, true);
2630                 if (ret)
2631                         return ret;
2632
2633                 /* As the head data may be changed when GRO enable, copy
2634                  * the head data in after other data rx completed
2635                  */
2636                 memcpy(skb->data, ring->va,
2637                        ALIGN(ring->pull_len, sizeof(long)));
2638         }
2639
2640         l234info = le32_to_cpu(desc->rx.l234_info);
2641         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2642
2643         /* Based on hw strategy, the tag offloaded will be stored at
2644          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2645          * in one layer tag case.
2646          */
2647         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2648                 u16 vlan_tag;
2649
2650                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2651                         __vlan_hwaccel_put_tag(skb,
2652                                                htons(ETH_P_8021Q),
2653                                                vlan_tag);
2654         }
2655
2656         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2657                 u64_stats_update_begin(&ring->syncp);
2658                 ring->stats.non_vld_descs++;
2659                 u64_stats_update_end(&ring->syncp);
2660
2661                 dev_kfree_skb_any(skb);
2662                 return -EINVAL;
2663         }
2664
2665         if (unlikely((!desc->rx.pkt_len) ||
2666                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2667                 u64_stats_update_begin(&ring->syncp);
2668                 ring->stats.err_pkt_len++;
2669                 u64_stats_update_end(&ring->syncp);
2670
2671                 dev_kfree_skb_any(skb);
2672                 return -EFAULT;
2673         }
2674
2675         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2676                 u64_stats_update_begin(&ring->syncp);
2677                 ring->stats.l2_err++;
2678                 u64_stats_update_end(&ring->syncp);
2679
2680                 dev_kfree_skb_any(skb);
2681                 return -EFAULT;
2682         }
2683
2684         u64_stats_update_begin(&ring->syncp);
2685         ring->stats.rx_pkts++;
2686         ring->stats.rx_bytes += skb->len;
2687         u64_stats_update_end(&ring->syncp);
2688
2689         ring->tqp_vector->rx_group.total_bytes += skb->len;
2690
2691         /* This is needed in order to enable forwarding support */
2692         hns3_set_gro_param(skb, l234info, bd_base_info);
2693
2694         hns3_rx_checksum(ring, skb, desc);
2695         *out_skb = skb;
2696         hns3_set_rx_skb_rss_type(ring, skb);
2697
2698         return 0;
2699 }
2700
2701 int hns3_clean_rx_ring(
2702                 struct hns3_enet_ring *ring, int budget,
2703                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2704 {
2705 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2706         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2707         int recv_pkts, recv_bds, clean_count, err;
2708         int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
2709         struct sk_buff *skb = ring->skb;
2710         int num;
2711
2712         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2713         rmb(); /* Make sure num taken effect before the other data is touched */
2714
2715         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2716         num -= unused_count;
2717
2718         while (recv_pkts < budget && recv_bds < num) {
2719                 /* Reuse or realloc buffers */
2720                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2721                         hns3_nic_alloc_rx_buffers(ring,
2722                                                   clean_count + unused_count);
2723                         clean_count = 0;
2724                         unused_count = hns3_desc_unused(ring) -
2725                                         ring->pending_buf;
2726                 }
2727
2728                 /* Poll one pkt */
2729                 err = hns3_handle_rx_bd(ring, &skb);
2730                 if (unlikely(!skb)) /* This fault cannot be repaired */
2731                         goto out;
2732
2733                 if (err == -ENXIO) { /* Do not get FE for the packet */
2734                         goto out;
2735                 } else if (unlikely(err)) {  /* Do jump the err */
2736                         recv_bds += ring->pending_buf;
2737                         clean_count += ring->pending_buf;
2738                         ring->skb = NULL;
2739                         ring->pending_buf = 0;
2740                         continue;
2741                 }
2742
2743                 /* Do update ip stack process */
2744                 skb->protocol = eth_type_trans(skb, netdev);
2745                 rx_fn(ring, skb);
2746                 recv_bds += ring->pending_buf;
2747                 clean_count += ring->pending_buf;
2748                 ring->skb = NULL;
2749                 ring->pending_buf = 0;
2750
2751                 recv_pkts++;
2752         }
2753
2754 out:
2755         /* Make all data has been write before submit */
2756         if (clean_count + unused_count > 0)
2757                 hns3_nic_alloc_rx_buffers(ring,
2758                                           clean_count + unused_count);
2759
2760         return recv_pkts;
2761 }
2762
2763 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2764 {
2765         struct hns3_enet_tqp_vector *tqp_vector =
2766                                         ring_group->ring->tqp_vector;
2767         enum hns3_flow_level_range new_flow_level;
2768         int packets_per_msecs;
2769         int bytes_per_msecs;
2770         u32 time_passed_ms;
2771         u16 new_int_gl;
2772
2773         if (!ring_group->coal.int_gl || !tqp_vector->last_jiffies)
2774                 return false;
2775
2776         if (ring_group->total_packets == 0) {
2777                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2778                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2779                 return true;
2780         }
2781
2782         /* Simple throttlerate management
2783          * 0-10MB/s   lower     (50000 ints/s)
2784          * 10-20MB/s   middle    (20000 ints/s)
2785          * 20-1249MB/s high      (18000 ints/s)
2786          * > 40000pps  ultra     (8000 ints/s)
2787          */
2788         new_flow_level = ring_group->coal.flow_level;
2789         new_int_gl = ring_group->coal.int_gl;
2790         time_passed_ms =
2791                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2792
2793         if (!time_passed_ms)
2794                 return false;
2795
2796         do_div(ring_group->total_packets, time_passed_ms);
2797         packets_per_msecs = ring_group->total_packets;
2798
2799         do_div(ring_group->total_bytes, time_passed_ms);
2800         bytes_per_msecs = ring_group->total_bytes;
2801
2802 #define HNS3_RX_LOW_BYTE_RATE 10000
2803 #define HNS3_RX_MID_BYTE_RATE 20000
2804
2805         switch (new_flow_level) {
2806         case HNS3_FLOW_LOW:
2807                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2808                         new_flow_level = HNS3_FLOW_MID;
2809                 break;
2810         case HNS3_FLOW_MID:
2811                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2812                         new_flow_level = HNS3_FLOW_HIGH;
2813                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2814                         new_flow_level = HNS3_FLOW_LOW;
2815                 break;
2816         case HNS3_FLOW_HIGH:
2817         case HNS3_FLOW_ULTRA:
2818         default:
2819                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2820                         new_flow_level = HNS3_FLOW_MID;
2821                 break;
2822         }
2823
2824 #define HNS3_RX_ULTRA_PACKET_RATE 40
2825
2826         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2827             &tqp_vector->rx_group == ring_group)
2828                 new_flow_level = HNS3_FLOW_ULTRA;
2829
2830         switch (new_flow_level) {
2831         case HNS3_FLOW_LOW:
2832                 new_int_gl = HNS3_INT_GL_50K;
2833                 break;
2834         case HNS3_FLOW_MID:
2835                 new_int_gl = HNS3_INT_GL_20K;
2836                 break;
2837         case HNS3_FLOW_HIGH:
2838                 new_int_gl = HNS3_INT_GL_18K;
2839                 break;
2840         case HNS3_FLOW_ULTRA:
2841                 new_int_gl = HNS3_INT_GL_8K;
2842                 break;
2843         default:
2844                 break;
2845         }
2846
2847         ring_group->total_bytes = 0;
2848         ring_group->total_packets = 0;
2849         ring_group->coal.flow_level = new_flow_level;
2850         if (new_int_gl != ring_group->coal.int_gl) {
2851                 ring_group->coal.int_gl = new_int_gl;
2852                 return true;
2853         }
2854         return false;
2855 }
2856
2857 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2858 {
2859         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2860         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2861         bool rx_update, tx_update;
2862
2863         /* update param every 1000ms */
2864         if (time_before(jiffies,
2865                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
2866                 return;
2867
2868         if (rx_group->coal.gl_adapt_enable) {
2869                 rx_update = hns3_get_new_int_gl(rx_group);
2870                 if (rx_update)
2871                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2872                                                        rx_group->coal.int_gl);
2873         }
2874
2875         if (tx_group->coal.gl_adapt_enable) {
2876                 tx_update = hns3_get_new_int_gl(&tqp_vector->tx_group);
2877                 if (tx_update)
2878                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2879                                                        tx_group->coal.int_gl);
2880         }
2881
2882         tqp_vector->last_jiffies = jiffies;
2883 }
2884
2885 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2886 {
2887         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
2888         struct hns3_enet_ring *ring;
2889         int rx_pkt_total = 0;
2890
2891         struct hns3_enet_tqp_vector *tqp_vector =
2892                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2893         bool clean_complete = true;
2894         int rx_budget;
2895
2896         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2897                 napi_complete(napi);
2898                 return 0;
2899         }
2900
2901         /* Since the actual Tx work is minimal, we can give the Tx a larger
2902          * budget and be more aggressive about cleaning up the Tx descriptors.
2903          */
2904         hns3_for_each_ring(ring, tqp_vector->tx_group)
2905                 hns3_clean_tx_ring(ring);
2906
2907         /* make sure rx ring budget not smaller than 1 */
2908         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2909
2910         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2911                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2912                                                     hns3_rx_skb);
2913
2914                 if (rx_cleaned >= rx_budget)
2915                         clean_complete = false;
2916
2917                 rx_pkt_total += rx_cleaned;
2918         }
2919
2920         tqp_vector->rx_group.total_packets += rx_pkt_total;
2921
2922         if (!clean_complete)
2923                 return budget;
2924
2925         if (napi_complete(napi) &&
2926             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2927                 hns3_update_new_int_gl(tqp_vector);
2928                 hns3_mask_vector_irq(tqp_vector, 1);
2929         }
2930
2931         return rx_pkt_total;
2932 }
2933
2934 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2935                                       struct hnae3_ring_chain_node *head)
2936 {
2937         struct pci_dev *pdev = tqp_vector->handle->pdev;
2938         struct hnae3_ring_chain_node *cur_chain = head;
2939         struct hnae3_ring_chain_node *chain;
2940         struct hns3_enet_ring *tx_ring;
2941         struct hns3_enet_ring *rx_ring;
2942
2943         tx_ring = tqp_vector->tx_group.ring;
2944         if (tx_ring) {
2945                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2946                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2947                               HNAE3_RING_TYPE_TX);
2948                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2949                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2950
2951                 cur_chain->next = NULL;
2952
2953                 while (tx_ring->next) {
2954                         tx_ring = tx_ring->next;
2955
2956                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2957                                              GFP_KERNEL);
2958                         if (!chain)
2959                                 goto err_free_chain;
2960
2961                         cur_chain->next = chain;
2962                         chain->tqp_index = tx_ring->tqp->tqp_index;
2963                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2964                                       HNAE3_RING_TYPE_TX);
2965                         hnae3_set_field(chain->int_gl_idx,
2966                                         HNAE3_RING_GL_IDX_M,
2967                                         HNAE3_RING_GL_IDX_S,
2968                                         HNAE3_RING_GL_TX);
2969
2970                         cur_chain = chain;
2971                 }
2972         }
2973
2974         rx_ring = tqp_vector->rx_group.ring;
2975         if (!tx_ring && rx_ring) {
2976                 cur_chain->next = NULL;
2977                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
2978                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2979                               HNAE3_RING_TYPE_RX);
2980                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2981                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2982
2983                 rx_ring = rx_ring->next;
2984         }
2985
2986         while (rx_ring) {
2987                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
2988                 if (!chain)
2989                         goto err_free_chain;
2990
2991                 cur_chain->next = chain;
2992                 chain->tqp_index = rx_ring->tqp->tqp_index;
2993                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2994                               HNAE3_RING_TYPE_RX);
2995                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2996                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2997
2998                 cur_chain = chain;
2999
3000                 rx_ring = rx_ring->next;
3001         }
3002
3003         return 0;
3004
3005 err_free_chain:
3006         cur_chain = head->next;
3007         while (cur_chain) {
3008                 chain = cur_chain->next;
3009                 devm_kfree(&pdev->dev, cur_chain);
3010                 cur_chain = chain;
3011         }
3012         head->next = NULL;
3013
3014         return -ENOMEM;
3015 }
3016
3017 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3018                                         struct hnae3_ring_chain_node *head)
3019 {
3020         struct pci_dev *pdev = tqp_vector->handle->pdev;
3021         struct hnae3_ring_chain_node *chain_tmp, *chain;
3022
3023         chain = head->next;
3024
3025         while (chain) {
3026                 chain_tmp = chain->next;
3027                 devm_kfree(&pdev->dev, chain);
3028                 chain = chain_tmp;
3029         }
3030 }
3031
3032 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3033                                    struct hns3_enet_ring *ring)
3034 {
3035         ring->next = group->ring;
3036         group->ring = ring;
3037
3038         group->count++;
3039 }
3040
3041 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3042 {
3043         struct pci_dev *pdev = priv->ae_handle->pdev;
3044         struct hns3_enet_tqp_vector *tqp_vector;
3045         int num_vectors = priv->vector_num;
3046         int numa_node;
3047         int vector_i;
3048
3049         numa_node = dev_to_node(&pdev->dev);
3050
3051         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3052                 tqp_vector = &priv->tqp_vector[vector_i];
3053                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3054                                 &tqp_vector->affinity_mask);
3055         }
3056 }
3057
3058 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3059 {
3060         struct hnae3_ring_chain_node vector_ring_chain;
3061         struct hnae3_handle *h = priv->ae_handle;
3062         struct hns3_enet_tqp_vector *tqp_vector;
3063         int ret = 0;
3064         int i;
3065
3066         hns3_nic_set_cpumask(priv);
3067
3068         for (i = 0; i < priv->vector_num; i++) {
3069                 tqp_vector = &priv->tqp_vector[i];
3070                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3071                 tqp_vector->num_tqps = 0;
3072         }
3073
3074         for (i = 0; i < h->kinfo.num_tqps; i++) {
3075                 u16 vector_i = i % priv->vector_num;
3076                 u16 tqp_num = h->kinfo.num_tqps;
3077
3078                 tqp_vector = &priv->tqp_vector[vector_i];
3079
3080                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3081                                        priv->ring_data[i].ring);
3082
3083                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3084                                        priv->ring_data[i + tqp_num].ring);
3085
3086                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3087                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3088                 tqp_vector->num_tqps++;
3089         }
3090
3091         for (i = 0; i < priv->vector_num; i++) {
3092                 tqp_vector = &priv->tqp_vector[i];
3093
3094                 tqp_vector->rx_group.total_bytes = 0;
3095                 tqp_vector->rx_group.total_packets = 0;
3096                 tqp_vector->tx_group.total_bytes = 0;
3097                 tqp_vector->tx_group.total_packets = 0;
3098                 tqp_vector->handle = h;
3099
3100                 ret = hns3_get_vector_ring_chain(tqp_vector,
3101                                                  &vector_ring_chain);
3102                 if (ret)
3103                         goto map_ring_fail;
3104
3105                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3106                         tqp_vector->vector_irq, &vector_ring_chain);
3107
3108                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3109
3110                 if (ret)
3111                         goto map_ring_fail;
3112
3113                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3114                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3115         }
3116
3117         return 0;
3118
3119 map_ring_fail:
3120         while (i--)
3121                 netif_napi_del(&priv->tqp_vector[i].napi);
3122
3123         return ret;
3124 }
3125
3126 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3127 {
3128 #define HNS3_VECTOR_PF_MAX_NUM          64
3129
3130         struct hnae3_handle *h = priv->ae_handle;
3131         struct hns3_enet_tqp_vector *tqp_vector;
3132         struct hnae3_vector_info *vector;
3133         struct pci_dev *pdev = h->pdev;
3134         u16 tqp_num = h->kinfo.num_tqps;
3135         u16 vector_num;
3136         int ret = 0;
3137         u16 i;
3138
3139         /* RSS size, cpu online and vector_num should be the same */
3140         /* Should consider 2p/4p later */
3141         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3142         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3143
3144         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3145                               GFP_KERNEL);
3146         if (!vector)
3147                 return -ENOMEM;
3148
3149         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3150
3151         priv->vector_num = vector_num;
3152         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3153                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3154                              GFP_KERNEL);
3155         if (!priv->tqp_vector) {
3156                 ret = -ENOMEM;
3157                 goto out;
3158         }
3159
3160         for (i = 0; i < priv->vector_num; i++) {
3161                 tqp_vector = &priv->tqp_vector[i];
3162                 tqp_vector->idx = i;
3163                 tqp_vector->mask_addr = vector[i].io_addr;
3164                 tqp_vector->vector_irq = vector[i].vector;
3165                 hns3_vector_gl_rl_init(tqp_vector, priv);
3166         }
3167
3168 out:
3169         devm_kfree(&pdev->dev, vector);
3170         return ret;
3171 }
3172
3173 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3174 {
3175         group->ring = NULL;
3176         group->count = 0;
3177 }
3178
3179 static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3180 {
3181         struct hnae3_ring_chain_node vector_ring_chain;
3182         struct hnae3_handle *h = priv->ae_handle;
3183         struct hns3_enet_tqp_vector *tqp_vector;
3184         int i, ret;
3185
3186         for (i = 0; i < priv->vector_num; i++) {
3187                 tqp_vector = &priv->tqp_vector[i];
3188
3189                 ret = hns3_get_vector_ring_chain(tqp_vector,
3190                                                  &vector_ring_chain);
3191                 if (ret)
3192                         return ret;
3193
3194                 ret = h->ae_algo->ops->unmap_ring_from_vector(h,
3195                         tqp_vector->vector_irq, &vector_ring_chain);
3196                 if (ret)
3197                         return ret;
3198
3199                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3200
3201                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3202                         irq_set_affinity_notifier(tqp_vector->vector_irq,
3203                                                   NULL);
3204                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3205                         free_irq(tqp_vector->vector_irq, tqp_vector);
3206                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3207                 }
3208
3209                 priv->ring_data[i].ring->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3210                 hns3_clear_ring_group(&tqp_vector->rx_group);
3211                 hns3_clear_ring_group(&tqp_vector->tx_group);
3212                 netif_napi_del(&priv->tqp_vector[i].napi);
3213         }
3214
3215         return 0;
3216 }
3217
3218 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3219 {
3220         struct hnae3_handle *h = priv->ae_handle;
3221         struct pci_dev *pdev = h->pdev;
3222         int i, ret;
3223
3224         for (i = 0; i < priv->vector_num; i++) {
3225                 struct hns3_enet_tqp_vector *tqp_vector;
3226
3227                 tqp_vector = &priv->tqp_vector[i];
3228                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3229                 if (ret)
3230                         return ret;
3231         }
3232
3233         devm_kfree(&pdev->dev, priv->tqp_vector);
3234         return 0;
3235 }
3236
3237 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3238                              int ring_type)
3239 {
3240         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3241         int queue_num = priv->ae_handle->kinfo.num_tqps;
3242         struct pci_dev *pdev = priv->ae_handle->pdev;
3243         struct hns3_enet_ring *ring;
3244
3245         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3246         if (!ring)
3247                 return -ENOMEM;
3248
3249         if (ring_type == HNAE3_RING_TYPE_TX) {
3250                 ring_data[q->tqp_index].ring = ring;
3251                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3252                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3253         } else {
3254                 ring_data[q->tqp_index + queue_num].ring = ring;
3255                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3256                 ring->io_base = q->io_base;
3257         }
3258
3259         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3260
3261         ring->tqp = q;
3262         ring->desc = NULL;
3263         ring->desc_cb = NULL;
3264         ring->dev = priv->dev;
3265         ring->desc_dma_addr = 0;
3266         ring->buf_size = q->buf_size;
3267         ring->desc_num = q->desc_num;
3268         ring->next_to_use = 0;
3269         ring->next_to_clean = 0;
3270
3271         return 0;
3272 }
3273
3274 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3275                               struct hns3_nic_priv *priv)
3276 {
3277         int ret;
3278
3279         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3280         if (ret)
3281                 return ret;
3282
3283         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3284         if (ret) {
3285                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3286                 return ret;
3287         }
3288
3289         return 0;
3290 }
3291
3292 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3293 {
3294         struct hnae3_handle *h = priv->ae_handle;
3295         struct pci_dev *pdev = h->pdev;
3296         int i, ret;
3297
3298         priv->ring_data =  devm_kzalloc(&pdev->dev,
3299                                         array3_size(h->kinfo.num_tqps,
3300                                                     sizeof(*priv->ring_data),
3301                                                     2),
3302                                         GFP_KERNEL);
3303         if (!priv->ring_data)
3304                 return -ENOMEM;
3305
3306         for (i = 0; i < h->kinfo.num_tqps; i++) {
3307                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3308                 if (ret)
3309                         goto err;
3310         }
3311
3312         return 0;
3313 err:
3314         while (i--) {
3315                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3316                 devm_kfree(priv->dev,
3317                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3318         }
3319
3320         devm_kfree(&pdev->dev, priv->ring_data);
3321         return ret;
3322 }
3323
3324 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3325 {
3326         struct hnae3_handle *h = priv->ae_handle;
3327         int i;
3328
3329         for (i = 0; i < h->kinfo.num_tqps; i++) {
3330                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3331                 devm_kfree(priv->dev,
3332                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3333         }
3334         devm_kfree(priv->dev, priv->ring_data);
3335 }
3336
3337 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3338 {
3339         int ret;
3340
3341         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3342                 return -EINVAL;
3343
3344         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
3345                                 GFP_KERNEL);
3346         if (!ring->desc_cb) {
3347                 ret = -ENOMEM;
3348                 goto out;
3349         }
3350
3351         ret = hns3_alloc_desc(ring);
3352         if (ret)
3353                 goto out_with_desc_cb;
3354
3355         if (!HNAE3_IS_TX_RING(ring)) {
3356                 ret = hns3_alloc_ring_buffers(ring);
3357                 if (ret)
3358                         goto out_with_desc;
3359         }
3360
3361         return 0;
3362
3363 out_with_desc:
3364         hns3_free_desc(ring);
3365 out_with_desc_cb:
3366         kfree(ring->desc_cb);
3367         ring->desc_cb = NULL;
3368 out:
3369         return ret;
3370 }
3371
3372 static void hns3_fini_ring(struct hns3_enet_ring *ring)
3373 {
3374         hns3_free_desc(ring);
3375         kfree(ring->desc_cb);
3376         ring->desc_cb = NULL;
3377         ring->next_to_clean = 0;
3378         ring->next_to_use = 0;
3379 }
3380
3381 static int hns3_buf_size2type(u32 buf_size)
3382 {
3383         int bd_size_type;
3384
3385         switch (buf_size) {
3386         case 512:
3387                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3388                 break;
3389         case 1024:
3390                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3391                 break;
3392         case 2048:
3393                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3394                 break;
3395         case 4096:
3396                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3397                 break;
3398         default:
3399                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3400         }
3401
3402         return bd_size_type;
3403 }
3404
3405 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3406 {
3407         dma_addr_t dma = ring->desc_dma_addr;
3408         struct hnae3_queue *q = ring->tqp;
3409
3410         if (!HNAE3_IS_TX_RING(ring)) {
3411                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3412                                (u32)dma);
3413                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3414                                (u32)((dma >> 31) >> 1));
3415
3416                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3417                                hns3_buf_size2type(ring->buf_size));
3418                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3419                                ring->desc_num / 8 - 1);
3420
3421         } else {
3422                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3423                                (u32)dma);
3424                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3425                                (u32)((dma >> 31) >> 1));
3426
3427                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3428                                ring->desc_num / 8 - 1);
3429         }
3430 }
3431
3432 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3433 {
3434         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3435         int i;
3436
3437         for (i = 0; i < HNAE3_MAX_TC; i++) {
3438                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3439                 int j;
3440
3441                 if (!tc_info->enable)
3442                         continue;
3443
3444                 for (j = 0; j < tc_info->tqp_count; j++) {
3445                         struct hnae3_queue *q;
3446
3447                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3448                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3449                                        tc_info->tc);
3450                 }
3451         }
3452 }
3453
3454 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3455 {
3456         struct hnae3_handle *h = priv->ae_handle;
3457         int ring_num = h->kinfo.num_tqps * 2;
3458         int i, j;
3459         int ret;
3460
3461         for (i = 0; i < ring_num; i++) {
3462                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3463                 if (ret) {
3464                         dev_err(priv->dev,
3465                                 "Alloc ring memory fail! ret=%d\n", ret);
3466                         goto out_when_alloc_ring_memory;
3467                 }
3468
3469                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3470         }
3471
3472         return 0;
3473
3474 out_when_alloc_ring_memory:
3475         for (j = i - 1; j >= 0; j--)
3476                 hns3_fini_ring(priv->ring_data[j].ring);
3477
3478         return -ENOMEM;
3479 }
3480
3481 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3482 {
3483         struct hnae3_handle *h = priv->ae_handle;
3484         int i;
3485
3486         for (i = 0; i < h->kinfo.num_tqps; i++) {
3487                 hns3_fini_ring(priv->ring_data[i].ring);
3488                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3489         }
3490         return 0;
3491 }
3492
3493 /* Set mac addr if it is configured. or leave it to the AE driver */
3494 static int hns3_init_mac_addr(struct net_device *netdev, bool init)
3495 {
3496         struct hns3_nic_priv *priv = netdev_priv(netdev);
3497         struct hnae3_handle *h = priv->ae_handle;
3498         u8 mac_addr_temp[ETH_ALEN];
3499         int ret = 0;
3500
3501         if (h->ae_algo->ops->get_mac_addr && init) {
3502                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3503                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3504         }
3505
3506         /* Check if the MAC address is valid, if not get a random one */
3507         if (!is_valid_ether_addr(netdev->dev_addr)) {
3508                 eth_hw_addr_random(netdev);
3509                 dev_warn(priv->dev, "using random MAC address %pM\n",
3510                          netdev->dev_addr);
3511         }
3512
3513         if (h->ae_algo->ops->set_mac_addr)
3514                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3515
3516         return ret;
3517 }
3518
3519 static int hns3_restore_fd_rules(struct net_device *netdev)
3520 {
3521         struct hnae3_handle *h = hns3_get_handle(netdev);
3522         int ret = 0;
3523
3524         if (h->ae_algo->ops->restore_fd_rules)
3525                 ret = h->ae_algo->ops->restore_fd_rules(h);
3526
3527         return ret;
3528 }
3529
3530 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3531 {
3532         struct hnae3_handle *h = hns3_get_handle(netdev);
3533
3534         if (h->ae_algo->ops->del_all_fd_entries)
3535                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3536 }
3537
3538 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3539 {
3540         struct hns3_nic_priv *priv = netdev_priv(netdev);
3541
3542         priv->ops.fill_desc = hns3_fill_desc;
3543         if ((netdev->features & NETIF_F_TSO) ||
3544             (netdev->features & NETIF_F_TSO6))
3545                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3546         else
3547                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3548 }
3549
3550 static int hns3_client_start(struct hnae3_handle *handle)
3551 {
3552         if (!handle->ae_algo->ops->client_start)
3553                 return 0;
3554
3555         return handle->ae_algo->ops->client_start(handle);
3556 }
3557
3558 static void hns3_client_stop(struct hnae3_handle *handle)
3559 {
3560         if (!handle->ae_algo->ops->client_stop)
3561                 return;
3562
3563         handle->ae_algo->ops->client_stop(handle);
3564 }
3565
3566 static int hns3_client_init(struct hnae3_handle *handle)
3567 {
3568         struct pci_dev *pdev = handle->pdev;
3569         u16 alloc_tqps, max_rss_size;
3570         struct hns3_nic_priv *priv;
3571         struct net_device *netdev;
3572         int ret;
3573
3574         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3575                                                     &max_rss_size);
3576         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3577         if (!netdev)
3578                 return -ENOMEM;
3579
3580         priv = netdev_priv(netdev);
3581         priv->dev = &pdev->dev;
3582         priv->netdev = netdev;
3583         priv->ae_handle = handle;
3584         priv->tx_timeout_count = 0;
3585
3586         handle->kinfo.netdev = netdev;
3587         handle->priv = (void *)priv;
3588
3589         hns3_init_mac_addr(netdev, true);
3590
3591         hns3_set_default_feature(netdev);
3592
3593         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3594         netdev->priv_flags |= IFF_UNICAST_FLT;
3595         netdev->netdev_ops = &hns3_nic_netdev_ops;
3596         SET_NETDEV_DEV(netdev, &pdev->dev);
3597         hns3_ethtool_set_ops(netdev);
3598         hns3_nic_set_priv_ops(netdev);
3599
3600         /* Carrier off reporting is important to ethtool even BEFORE open */
3601         netif_carrier_off(netdev);
3602
3603         ret = hns3_get_ring_config(priv);
3604         if (ret) {
3605                 ret = -ENOMEM;
3606                 goto out_get_ring_cfg;
3607         }
3608
3609         ret = hns3_nic_alloc_vector_data(priv);
3610         if (ret) {
3611                 ret = -ENOMEM;
3612                 goto out_alloc_vector_data;
3613         }
3614
3615         ret = hns3_nic_init_vector_data(priv);
3616         if (ret) {
3617                 ret = -ENOMEM;
3618                 goto out_init_vector_data;
3619         }
3620
3621         ret = hns3_init_all_ring(priv);
3622         if (ret) {
3623                 ret = -ENOMEM;
3624                 goto out_init_ring_data;
3625         }
3626
3627         ret = register_netdev(netdev);
3628         if (ret) {
3629                 dev_err(priv->dev, "probe register netdev fail!\n");
3630                 goto out_reg_netdev_fail;
3631         }
3632
3633         ret = hns3_client_start(handle);
3634         if (ret) {
3635                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
3636                         goto out_reg_netdev_fail;
3637         }
3638
3639         hns3_dcbnl_setup(handle);
3640
3641         hns3_dbg_init(handle);
3642
3643         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
3644         netdev->max_mtu = HNS3_MAX_MTU;
3645
3646         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
3647
3648         return ret;
3649
3650 out_reg_netdev_fail:
3651 out_init_ring_data:
3652         (void)hns3_nic_uninit_vector_data(priv);
3653 out_init_vector_data:
3654         hns3_nic_dealloc_vector_data(priv);
3655 out_alloc_vector_data:
3656         priv->ring_data = NULL;
3657 out_get_ring_cfg:
3658         priv->ae_handle = NULL;
3659         free_netdev(netdev);
3660         return ret;
3661 }
3662
3663 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3664 {
3665         struct net_device *netdev = handle->kinfo.netdev;
3666         struct hns3_nic_priv *priv = netdev_priv(netdev);
3667         int ret;
3668
3669         hns3_client_stop(handle);
3670
3671         hns3_remove_hw_addr(netdev);
3672
3673         if (netdev->reg_state != NETREG_UNINITIALIZED)
3674                 unregister_netdev(netdev);
3675
3676         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
3677                 netdev_warn(netdev, "already uninitialized\n");
3678                 goto out_netdev_free;
3679         }
3680
3681         hns3_del_all_fd_rules(netdev, true);
3682
3683         hns3_force_clear_all_rx_ring(handle);
3684
3685         ret = hns3_nic_uninit_vector_data(priv);
3686         if (ret)
3687                 netdev_err(netdev, "uninit vector error\n");
3688
3689         ret = hns3_nic_dealloc_vector_data(priv);
3690         if (ret)
3691                 netdev_err(netdev, "dealloc vector error\n");
3692
3693         ret = hns3_uninit_all_ring(priv);
3694         if (ret)
3695                 netdev_err(netdev, "uninit ring error\n");
3696
3697         hns3_put_ring_config(priv);
3698
3699         hns3_dbg_uninit(handle);
3700
3701         priv->ring_data = NULL;
3702
3703 out_netdev_free:
3704         free_netdev(netdev);
3705 }
3706
3707 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3708 {
3709         struct net_device *netdev = handle->kinfo.netdev;
3710
3711         if (!netdev)
3712                 return;
3713
3714         if (linkup) {
3715                 netif_carrier_on(netdev);
3716                 netif_tx_wake_all_queues(netdev);
3717                 netdev_info(netdev, "link up\n");
3718         } else {
3719                 netif_carrier_off(netdev);
3720                 netif_tx_stop_all_queues(netdev);
3721                 netdev_info(netdev, "link down\n");
3722         }
3723 }
3724
3725 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3726 {
3727         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3728         struct net_device *ndev = kinfo->netdev;
3729         bool if_running;
3730         int ret;
3731
3732         if (tc > HNAE3_MAX_TC)
3733                 return -EINVAL;
3734
3735         if (!ndev)
3736                 return -ENODEV;
3737
3738         if_running = netif_running(ndev);
3739
3740         if (if_running) {
3741                 (void)hns3_nic_net_stop(ndev);
3742                 msleep(100);
3743         }
3744
3745         ret = (kinfo->dcb_ops && kinfo->dcb_ops->map_update) ?
3746                 kinfo->dcb_ops->map_update(handle) : -EOPNOTSUPP;
3747         if (ret)
3748                 goto err_out;
3749
3750         ret = hns3_nic_set_real_num_queue(ndev);
3751
3752 err_out:
3753         if (if_running)
3754                 (void)hns3_nic_net_open(ndev);
3755
3756         return ret;
3757 }
3758
3759 static int hns3_recover_hw_addr(struct net_device *ndev)
3760 {
3761         struct netdev_hw_addr_list *list;
3762         struct netdev_hw_addr *ha, *tmp;
3763         int ret = 0;
3764
3765         /* go through and sync uc_addr entries to the device */
3766         list = &ndev->uc;
3767         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3768                 ret = hns3_nic_uc_sync(ndev, ha->addr);
3769                 if (ret)
3770                         return ret;
3771         }
3772
3773         /* go through and sync mc_addr entries to the device */
3774         list = &ndev->mc;
3775         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3776                 ret = hns3_nic_mc_sync(ndev, ha->addr);
3777                 if (ret)
3778                         return ret;
3779         }
3780
3781         return ret;
3782 }
3783
3784 static void hns3_remove_hw_addr(struct net_device *netdev)
3785 {
3786         struct netdev_hw_addr_list *list;
3787         struct netdev_hw_addr *ha, *tmp;
3788
3789         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
3790
3791         /* go through and unsync uc_addr entries to the device */
3792         list = &netdev->uc;
3793         list_for_each_entry_safe(ha, tmp, &list->list, list)
3794                 hns3_nic_uc_unsync(netdev, ha->addr);
3795
3796         /* go through and unsync mc_addr entries to the device */
3797         list = &netdev->mc;
3798         list_for_each_entry_safe(ha, tmp, &list->list, list)
3799                 if (ha->refcount > 1)
3800                         hns3_nic_mc_unsync(netdev, ha->addr);
3801 }
3802
3803 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3804 {
3805         while (ring->next_to_clean != ring->next_to_use) {
3806                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3807                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3808                 ring_ptr_move_fw(ring, next_to_clean);
3809         }
3810 }
3811
3812 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3813 {
3814         struct hns3_desc_cb res_cbs;
3815         int ret;
3816
3817         while (ring->next_to_use != ring->next_to_clean) {
3818                 /* When a buffer is not reused, it's memory has been
3819                  * freed in hns3_handle_rx_bd or will be freed by
3820                  * stack, so we need to replace the buffer here.
3821                  */
3822                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3823                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3824                         if (ret) {
3825                                 u64_stats_update_begin(&ring->syncp);
3826                                 ring->stats.sw_err_cnt++;
3827                                 u64_stats_update_end(&ring->syncp);
3828                                 /* if alloc new buffer fail, exit directly
3829                                  * and reclear in up flow.
3830                                  */
3831                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3832                                             "reserve buffer map failed, ret = %d\n",
3833                                             ret);
3834                                 return ret;
3835                         }
3836                         hns3_replace_buffer(ring, ring->next_to_use,
3837                                             &res_cbs);
3838                 }
3839                 ring_ptr_move_fw(ring, next_to_use);
3840         }
3841
3842         return 0;
3843 }
3844
3845 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3846 {
3847         while (ring->next_to_use != ring->next_to_clean) {
3848                 /* When a buffer is not reused, it's memory has been
3849                  * freed in hns3_handle_rx_bd or will be freed by
3850                  * stack, so only need to unmap the buffer here.
3851                  */
3852                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3853                         hns3_unmap_buffer(ring,
3854                                           &ring->desc_cb[ring->next_to_use]);
3855                         ring->desc_cb[ring->next_to_use].dma = 0;
3856                 }
3857
3858                 ring_ptr_move_fw(ring, next_to_use);
3859         }
3860 }
3861
3862 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3863 {
3864         struct net_device *ndev = h->kinfo.netdev;
3865         struct hns3_nic_priv *priv = netdev_priv(ndev);
3866         struct hns3_enet_ring *ring;
3867         u32 i;
3868
3869         for (i = 0; i < h->kinfo.num_tqps; i++) {
3870                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3871                 hns3_force_clear_rx_ring(ring);
3872         }
3873 }
3874
3875 static void hns3_clear_all_ring(struct hnae3_handle *h)
3876 {
3877         struct net_device *ndev = h->kinfo.netdev;
3878         struct hns3_nic_priv *priv = netdev_priv(ndev);
3879         u32 i;
3880
3881         for (i = 0; i < h->kinfo.num_tqps; i++) {
3882                 struct netdev_queue *dev_queue;
3883                 struct hns3_enet_ring *ring;
3884
3885                 ring = priv->ring_data[i].ring;
3886                 hns3_clear_tx_ring(ring);
3887                 dev_queue = netdev_get_tx_queue(ndev,
3888                                                 priv->ring_data[i].queue_index);
3889                 netdev_tx_reset_queue(dev_queue);
3890
3891                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3892                 /* Continue to clear other rings even if clearing some
3893                  * rings failed.
3894                  */
3895                 hns3_clear_rx_ring(ring);
3896         }
3897 }
3898
3899 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3900 {
3901         struct net_device *ndev = h->kinfo.netdev;
3902         struct hns3_nic_priv *priv = netdev_priv(ndev);
3903         struct hns3_enet_ring *rx_ring;
3904         int i, j;
3905         int ret;
3906
3907         for (i = 0; i < h->kinfo.num_tqps; i++) {
3908                 ret = h->ae_algo->ops->reset_queue(h, i);
3909                 if (ret)
3910                         return ret;
3911
3912                 hns3_init_ring_hw(priv->ring_data[i].ring);
3913
3914                 /* We need to clear tx ring here because self test will
3915                  * use the ring and will not run down before up
3916                  */
3917                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3918                 priv->ring_data[i].ring->next_to_clean = 0;
3919                 priv->ring_data[i].ring->next_to_use = 0;
3920
3921                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3922                 hns3_init_ring_hw(rx_ring);
3923                 ret = hns3_clear_rx_ring(rx_ring);
3924                 if (ret)
3925                         return ret;
3926
3927                 /* We can not know the hardware head and tail when this
3928                  * function is called in reset flow, so we reuse all desc.
3929                  */
3930                 for (j = 0; j < rx_ring->desc_num; j++)
3931                         hns3_reuse_buffer(rx_ring, j);
3932
3933                 rx_ring->next_to_clean = 0;
3934                 rx_ring->next_to_use = 0;
3935         }
3936
3937         hns3_init_tx_ring_tc(priv);
3938
3939         return 0;
3940 }
3941
3942 static void hns3_store_coal(struct hns3_nic_priv *priv)
3943 {
3944         /* ethtool only support setting and querying one coal
3945          * configuation for now, so save the vector 0' coal
3946          * configuation here in order to restore it.
3947          */
3948         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3949                sizeof(struct hns3_enet_coalesce));
3950         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3951                sizeof(struct hns3_enet_coalesce));
3952 }
3953
3954 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3955 {
3956         u16 vector_num = priv->vector_num;
3957         int i;
3958
3959         for (i = 0; i < vector_num; i++) {
3960                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3961                        sizeof(struct hns3_enet_coalesce));
3962                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3963                        sizeof(struct hns3_enet_coalesce));
3964         }
3965 }
3966
3967 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3968 {
3969         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
3970         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3971         struct net_device *ndev = kinfo->netdev;
3972         struct hns3_nic_priv *priv = netdev_priv(ndev);
3973
3974         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
3975                 return 0;
3976
3977         /* it is cumbersome for hardware to pick-and-choose entries for deletion
3978          * from table space. Hence, for function reset software intervention is
3979          * required to delete the entries
3980          */
3981         if (hns3_dev_ongoing_func_reset(ae_dev)) {
3982                 hns3_remove_hw_addr(ndev);
3983                 hns3_del_all_fd_rules(ndev, false);
3984         }
3985
3986         if (!netif_running(ndev))
3987                 return 0;
3988
3989         return hns3_nic_net_stop(ndev);
3990 }
3991
3992 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
3993 {
3994         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3995         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
3996         int ret = 0;
3997
3998         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
3999
4000         if (netif_running(kinfo->netdev)) {
4001                 ret = hns3_nic_net_open(kinfo->netdev);
4002                 if (ret) {
4003                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4004                         netdev_err(kinfo->netdev,
4005                                    "hns net up fail, ret=%d!\n", ret);
4006                         return ret;
4007                 }
4008         }
4009
4010         return ret;
4011 }
4012
4013 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4014 {
4015         struct net_device *netdev = handle->kinfo.netdev;
4016         struct hns3_nic_priv *priv = netdev_priv(netdev);
4017         bool vlan_filter_enable;
4018         int ret;
4019
4020         ret = hns3_init_mac_addr(netdev, false);
4021         if (ret)
4022                 return ret;
4023
4024         ret = hns3_recover_hw_addr(netdev);
4025         if (ret)
4026                 return ret;
4027
4028         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4029         if (ret)
4030                 return ret;
4031
4032         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4033         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4034
4035         /* Hardware table is only clear when pf resets */
4036         if (!(handle->flags & HNAE3_SUPPORT_VF)) {
4037                 ret = hns3_restore_vlan(netdev);
4038                 if (ret)
4039                         return ret;
4040         }
4041
4042         ret = hns3_restore_fd_rules(netdev);
4043         if (ret)
4044                 return ret;
4045
4046         /* Carrier off reporting is important to ethtool even BEFORE open */
4047         netif_carrier_off(netdev);
4048
4049         ret = hns3_nic_alloc_vector_data(priv);
4050         if (ret)
4051                 return ret;
4052
4053         hns3_restore_coal(priv);
4054
4055         ret = hns3_nic_init_vector_data(priv);
4056         if (ret)
4057                 goto err_dealloc_vector;
4058
4059         ret = hns3_init_all_ring(priv);
4060         if (ret)
4061                 goto err_uninit_vector;
4062
4063         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4064
4065         return ret;
4066
4067 err_uninit_vector:
4068         hns3_nic_uninit_vector_data(priv);
4069         priv->ring_data = NULL;
4070 err_dealloc_vector:
4071         hns3_nic_dealloc_vector_data(priv);
4072
4073         return ret;
4074 }
4075
4076 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4077 {
4078         struct net_device *netdev = handle->kinfo.netdev;
4079         struct hns3_nic_priv *priv = netdev_priv(netdev);
4080         int ret;
4081
4082         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4083                 netdev_warn(netdev, "already uninitialized\n");
4084                 return 0;
4085         }
4086
4087         hns3_force_clear_all_rx_ring(handle);
4088
4089         ret = hns3_nic_uninit_vector_data(priv);
4090         if (ret) {
4091                 netdev_err(netdev, "uninit vector error\n");
4092                 return ret;
4093         }
4094
4095         hns3_store_coal(priv);
4096
4097         ret = hns3_nic_dealloc_vector_data(priv);
4098         if (ret)
4099                 netdev_err(netdev, "dealloc vector error\n");
4100
4101         ret = hns3_uninit_all_ring(priv);
4102         if (ret)
4103                 netdev_err(netdev, "uninit ring error\n");
4104
4105         clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
4106
4107         return ret;
4108 }
4109
4110 static int hns3_reset_notify(struct hnae3_handle *handle,
4111                              enum hnae3_reset_notify_type type)
4112 {
4113         int ret = 0;
4114
4115         switch (type) {
4116         case HNAE3_UP_CLIENT:
4117                 ret = hns3_reset_notify_up_enet(handle);
4118                 break;
4119         case HNAE3_DOWN_CLIENT:
4120                 ret = hns3_reset_notify_down_enet(handle);
4121                 break;
4122         case HNAE3_INIT_CLIENT:
4123                 ret = hns3_reset_notify_init_enet(handle);
4124                 break;
4125         case HNAE3_UNINIT_CLIENT:
4126                 ret = hns3_reset_notify_uninit_enet(handle);
4127                 break;
4128         default:
4129                 break;
4130         }
4131
4132         return ret;
4133 }
4134
4135 static int hns3_modify_tqp_num(struct net_device *netdev, u16 new_tqp_num)
4136 {
4137         struct hns3_nic_priv *priv = netdev_priv(netdev);
4138         struct hnae3_handle *h = hns3_get_handle(netdev);
4139         int ret;
4140
4141         ret = h->ae_algo->ops->set_channels(h, new_tqp_num);
4142         if (ret)
4143                 return ret;
4144
4145         ret = hns3_get_ring_config(priv);
4146         if (ret)
4147                 return ret;
4148
4149         ret = hns3_nic_alloc_vector_data(priv);
4150         if (ret)
4151                 goto err_alloc_vector;
4152
4153         hns3_restore_coal(priv);
4154
4155         ret = hns3_nic_init_vector_data(priv);
4156         if (ret)
4157                 goto err_uninit_vector;
4158
4159         ret = hns3_init_all_ring(priv);
4160         if (ret)
4161                 goto err_put_ring;
4162
4163         return 0;
4164
4165 err_put_ring:
4166         hns3_put_ring_config(priv);
4167 err_uninit_vector:
4168         hns3_nic_uninit_vector_data(priv);
4169 err_alloc_vector:
4170         hns3_nic_dealloc_vector_data(priv);
4171         return ret;
4172 }
4173
4174 static int hns3_adjust_tqps_num(u8 num_tc, u32 new_tqp_num)
4175 {
4176         return (new_tqp_num / num_tc) * num_tc;
4177 }
4178
4179 int hns3_set_channels(struct net_device *netdev,
4180                       struct ethtool_channels *ch)
4181 {
4182         struct hns3_nic_priv *priv = netdev_priv(netdev);
4183         struct hnae3_handle *h = hns3_get_handle(netdev);
4184         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4185         bool if_running = netif_running(netdev);
4186         u32 new_tqp_num = ch->combined_count;
4187         u16 org_tqp_num;
4188         int ret;
4189
4190         if (ch->rx_count || ch->tx_count)
4191                 return -EINVAL;
4192
4193         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4194             new_tqp_num < kinfo->num_tc) {
4195                 dev_err(&netdev->dev,
4196                         "Change tqps fail, the tqp range is from %d to %d",
4197                         kinfo->num_tc,
4198                         hns3_get_max_available_channels(h));
4199                 return -EINVAL;
4200         }
4201
4202         new_tqp_num = hns3_adjust_tqps_num(kinfo->num_tc, new_tqp_num);
4203         if (kinfo->num_tqps == new_tqp_num)
4204                 return 0;
4205
4206         if (if_running)
4207                 hns3_nic_net_stop(netdev);
4208
4209         ret = hns3_nic_uninit_vector_data(priv);
4210         if (ret) {
4211                 dev_err(&netdev->dev,
4212                         "Unbind vector with tqp fail, nothing is changed");
4213                 goto open_netdev;
4214         }
4215
4216         hns3_store_coal(priv);
4217
4218         hns3_nic_dealloc_vector_data(priv);
4219
4220         hns3_uninit_all_ring(priv);
4221         hns3_put_ring_config(priv);
4222
4223         org_tqp_num = h->kinfo.num_tqps;
4224         ret = hns3_modify_tqp_num(netdev, new_tqp_num);
4225         if (ret) {
4226                 ret = hns3_modify_tqp_num(netdev, org_tqp_num);
4227                 if (ret) {
4228                         /* If revert to old tqp failed, fatal error occurred */
4229                         dev_err(&netdev->dev,
4230                                 "Revert to old tqp num fail, ret=%d", ret);
4231                         return ret;
4232                 }
4233                 dev_info(&netdev->dev,
4234                          "Change tqp num fail, Revert to old tqp num");
4235         }
4236
4237 open_netdev:
4238         if (if_running)
4239                 hns3_nic_net_open(netdev);
4240
4241         return ret;
4242 }
4243
4244 static const struct hnae3_client_ops client_ops = {
4245         .init_instance = hns3_client_init,
4246         .uninit_instance = hns3_client_uninit,
4247         .link_status_change = hns3_link_status_change,
4248         .setup_tc = hns3_client_setup_tc,
4249         .reset_notify = hns3_reset_notify,
4250 };
4251
4252 /* hns3_init_module - Driver registration routine
4253  * hns3_init_module is the first routine called when the driver is
4254  * loaded. All it does is register with the PCI subsystem.
4255  */
4256 static int __init hns3_init_module(void)
4257 {
4258         int ret;
4259
4260         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4261         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4262
4263         client.type = HNAE3_CLIENT_KNIC;
4264         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4265                  hns3_driver_name);
4266
4267         client.ops = &client_ops;
4268
4269         INIT_LIST_HEAD(&client.node);
4270
4271         hns3_dbg_register_debugfs(hns3_driver_name);
4272
4273         ret = hnae3_register_client(&client);
4274         if (ret)
4275                 goto err_reg_client;
4276
4277         ret = pci_register_driver(&hns3_driver);
4278         if (ret)
4279                 goto err_reg_driver;
4280
4281         return ret;
4282
4283 err_reg_driver:
4284         hnae3_unregister_client(&client);
4285 err_reg_client:
4286         hns3_dbg_unregister_debugfs();
4287         return ret;
4288 }
4289 module_init(hns3_init_module);
4290
4291 /* hns3_exit_module - Driver exit cleanup routine
4292  * hns3_exit_module is called just before the driver is removed
4293  * from memory.
4294  */
4295 static void __exit hns3_exit_module(void)
4296 {
4297         pci_unregister_driver(&hns3_driver);
4298         hnae3_unregister_client(&client);
4299         hns3_dbg_unregister_debugfs();
4300 }
4301 module_exit(hns3_exit_module);
4302
4303 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4304 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4305 MODULE_LICENSE("GPL");
4306 MODULE_ALIAS("pci:hns-nic");
4307 MODULE_VERSION(HNS3_MOD_VERSION);