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_alloc_coherent(ring_to_dev(ring), size,
2045                                         &ring->desc_dma_addr, GFP_KERNEL);
2046         if (!ring->desc)
2047                 return -ENOMEM;
2048
2049         return 0;
2050 }
2051
2052 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2053                                    struct hns3_desc_cb *cb)
2054 {
2055         int ret;
2056
2057         ret = hns3_alloc_buffer(ring, cb);
2058         if (ret)
2059                 goto out;
2060
2061         ret = hns3_map_buffer(ring, cb);
2062         if (ret)
2063                 goto out_with_buf;
2064
2065         return 0;
2066
2067 out_with_buf:
2068         hns3_free_buffer(ring, cb);
2069 out:
2070         return ret;
2071 }
2072
2073 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2074 {
2075         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2076
2077         if (ret)
2078                 return ret;
2079
2080         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2081
2082         return 0;
2083 }
2084
2085 /* Allocate memory for raw pkg, and map with dma */
2086 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2087 {
2088         int i, j, ret;
2089
2090         for (i = 0; i < ring->desc_num; i++) {
2091                 ret = hns3_alloc_buffer_attach(ring, i);
2092                 if (ret)
2093                         goto out_buffer_fail;
2094         }
2095
2096         return 0;
2097
2098 out_buffer_fail:
2099         for (j = i - 1; j >= 0; j--)
2100                 hns3_free_buffer_detach(ring, j);
2101         return ret;
2102 }
2103
2104 /* detach a in-used buffer and replace with a reserved one  */
2105 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2106                                 struct hns3_desc_cb *res_cb)
2107 {
2108         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2109         ring->desc_cb[i] = *res_cb;
2110         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2111         ring->desc[i].rx.bd_base_info = 0;
2112 }
2113
2114 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2115 {
2116         ring->desc_cb[i].reuse_flag = 0;
2117         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
2118                 + ring->desc_cb[i].page_offset);
2119         ring->desc[i].rx.bd_base_info = 0;
2120 }
2121
2122 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
2123                                       int *pkts)
2124 {
2125         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2126
2127         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2128         (*bytes) += desc_cb->length;
2129         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
2130         hns3_free_buffer_detach(ring, ring->next_to_clean);
2131
2132         ring_ptr_move_fw(ring, next_to_clean);
2133 }
2134
2135 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2136 {
2137         int u = ring->next_to_use;
2138         int c = ring->next_to_clean;
2139
2140         if (unlikely(h > ring->desc_num))
2141                 return 0;
2142
2143         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2144 }
2145
2146 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2147 {
2148         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2149         struct hns3_nic_priv *priv = netdev_priv(netdev);
2150         struct netdev_queue *dev_queue;
2151         int bytes, pkts;
2152         int head;
2153
2154         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2155         rmb(); /* Make sure head is ready before touch any data */
2156
2157         if (is_ring_empty(ring) || head == ring->next_to_clean)
2158                 return; /* no data to poll */
2159
2160         if (unlikely(!is_valid_clean_head(ring, head))) {
2161                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2162                            ring->next_to_use, ring->next_to_clean);
2163
2164                 u64_stats_update_begin(&ring->syncp);
2165                 ring->stats.io_err_cnt++;
2166                 u64_stats_update_end(&ring->syncp);
2167                 return;
2168         }
2169
2170         bytes = 0;
2171         pkts = 0;
2172         while (head != ring->next_to_clean) {
2173                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2174                 /* Issue prefetch for next Tx descriptor */
2175                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2176         }
2177
2178         ring->tqp_vector->tx_group.total_bytes += bytes;
2179         ring->tqp_vector->tx_group.total_packets += pkts;
2180
2181         u64_stats_update_begin(&ring->syncp);
2182         ring->stats.tx_bytes += bytes;
2183         ring->stats.tx_pkts += pkts;
2184         u64_stats_update_end(&ring->syncp);
2185
2186         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2187         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2188
2189         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2190                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2191                 /* Make sure that anybody stopping the queue after this
2192                  * sees the new next_to_clean.
2193                  */
2194                 smp_mb();
2195                 if (netif_tx_queue_stopped(dev_queue) &&
2196                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2197                         netif_tx_wake_queue(dev_queue);
2198                         ring->stats.restart_queue++;
2199                 }
2200         }
2201 }
2202
2203 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2204 {
2205         int ntc = ring->next_to_clean;
2206         int ntu = ring->next_to_use;
2207
2208         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2209 }
2210
2211 static void
2212 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2213 {
2214         struct hns3_desc_cb *desc_cb;
2215         struct hns3_desc_cb res_cbs;
2216         int i, ret;
2217
2218         for (i = 0; i < cleand_count; i++) {
2219                 desc_cb = &ring->desc_cb[ring->next_to_use];
2220                 if (desc_cb->reuse_flag) {
2221                         u64_stats_update_begin(&ring->syncp);
2222                         ring->stats.reuse_pg_cnt++;
2223                         u64_stats_update_end(&ring->syncp);
2224
2225                         hns3_reuse_buffer(ring, ring->next_to_use);
2226                 } else {
2227                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2228                         if (ret) {
2229                                 u64_stats_update_begin(&ring->syncp);
2230                                 ring->stats.sw_err_cnt++;
2231                                 u64_stats_update_end(&ring->syncp);
2232
2233                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2234                                            "hnae reserve buffer map failed.\n");
2235                                 break;
2236                         }
2237                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2238                 }
2239
2240                 ring_ptr_move_fw(ring, next_to_use);
2241         }
2242
2243         wmb(); /* Make all data has been write before submit */
2244         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2245 }
2246
2247 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2248                                 struct hns3_enet_ring *ring, int pull_len,
2249                                 struct hns3_desc_cb *desc_cb)
2250 {
2251         struct hns3_desc *desc;
2252         u32 truesize;
2253         int size;
2254         int last_offset;
2255         bool twobufs;
2256
2257         twobufs = ((PAGE_SIZE < 8192) &&
2258                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2259
2260         desc = &ring->desc[ring->next_to_clean];
2261         size = le16_to_cpu(desc->rx.size);
2262
2263         truesize = hnae3_buf_size(ring);
2264
2265         if (!twobufs)
2266                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2267
2268         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2269                         size - pull_len, truesize);
2270
2271          /* Avoid re-using remote pages,flag default unreuse */
2272         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2273                 return;
2274
2275         if (twobufs) {
2276                 /* If we are only owner of page we can reuse it */
2277                 if (likely(page_count(desc_cb->priv) == 1)) {
2278                         /* Flip page offset to other buffer */
2279                         desc_cb->page_offset ^= truesize;
2280
2281                         desc_cb->reuse_flag = 1;
2282                         /* bump ref count on page before it is given*/
2283                         get_page(desc_cb->priv);
2284                 }
2285                 return;
2286         }
2287
2288         /* Move offset up to the next cache line */
2289         desc_cb->page_offset += truesize;
2290
2291         if (desc_cb->page_offset <= last_offset) {
2292                 desc_cb->reuse_flag = 1;
2293                 /* Bump ref count on page before it is given*/
2294                 get_page(desc_cb->priv);
2295         }
2296 }
2297
2298 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2299                              struct hns3_desc *desc)
2300 {
2301         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2302         int l3_type, l4_type;
2303         u32 bd_base_info;
2304         int ol4_type;
2305         u32 l234info;
2306
2307         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2308         l234info = le32_to_cpu(desc->rx.l234_info);
2309
2310         skb->ip_summed = CHECKSUM_NONE;
2311
2312         skb_checksum_none_assert(skb);
2313
2314         if (!(netdev->features & NETIF_F_RXCSUM))
2315                 return;
2316
2317         /* We MUST enable hardware checksum before enabling hardware GRO */
2318         if (skb_shinfo(skb)->gso_size) {
2319                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2320                 return;
2321         }
2322
2323         /* check if hardware has done checksum */
2324         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2325                 return;
2326
2327         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2328                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2329                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2330                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2331                 u64_stats_update_begin(&ring->syncp);
2332                 ring->stats.l3l4_csum_err++;
2333                 u64_stats_update_end(&ring->syncp);
2334
2335                 return;
2336         }
2337
2338         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2339                                   HNS3_RXD_L3ID_S);
2340         l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2341                                   HNS3_RXD_L4ID_S);
2342
2343         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2344                                    HNS3_RXD_OL4ID_S);
2345         switch (ol4_type) {
2346         case HNS3_OL4_TYPE_MAC_IN_UDP:
2347         case HNS3_OL4_TYPE_NVGRE:
2348                 skb->csum_level = 1;
2349                 /* fall through */
2350         case HNS3_OL4_TYPE_NO_TUN:
2351                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2352                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2353                      l3_type == HNS3_L3_TYPE_IPV6) &&
2354                     (l4_type == HNS3_L4_TYPE_UDP ||
2355                      l4_type == HNS3_L4_TYPE_TCP ||
2356                      l4_type == HNS3_L4_TYPE_SCTP))
2357                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2358                 break;
2359         default:
2360                 break;
2361         }
2362 }
2363
2364 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2365 {
2366         if (skb_has_frag_list(skb))
2367                 napi_gro_flush(&ring->tqp_vector->napi, false);
2368
2369         napi_gro_receive(&ring->tqp_vector->napi, skb);
2370 }
2371
2372 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2373                                 struct hns3_desc *desc, u32 l234info,
2374                                 u16 *vlan_tag)
2375 {
2376         struct pci_dev *pdev = ring->tqp->handle->pdev;
2377
2378         if (pdev->revision == 0x20) {
2379                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2380                 if (!(*vlan_tag & VLAN_VID_MASK))
2381                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2382
2383                 return (*vlan_tag != 0);
2384         }
2385
2386 #define HNS3_STRP_OUTER_VLAN    0x1
2387 #define HNS3_STRP_INNER_VLAN    0x2
2388
2389         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2390                                 HNS3_RXD_STRP_TAGP_S)) {
2391         case HNS3_STRP_OUTER_VLAN:
2392                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2393                 return true;
2394         case HNS3_STRP_INNER_VLAN:
2395                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2396                 return true;
2397         default:
2398                 return false;
2399         }
2400 }
2401
2402 static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
2403                           unsigned char *va)
2404 {
2405 #define HNS3_NEED_ADD_FRAG      1
2406         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2407         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2408         struct sk_buff *skb;
2409
2410         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2411         skb = ring->skb;
2412         if (unlikely(!skb)) {
2413                 netdev_err(netdev, "alloc rx skb fail\n");
2414
2415                 u64_stats_update_begin(&ring->syncp);
2416                 ring->stats.sw_err_cnt++;
2417                 u64_stats_update_end(&ring->syncp);
2418
2419                 return -ENOMEM;
2420         }
2421
2422         prefetchw(skb->data);
2423
2424         ring->pending_buf = 1;
2425         ring->frag_num = 0;
2426         ring->tail_skb = NULL;
2427         if (length <= HNS3_RX_HEAD_SIZE) {
2428                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2429
2430                 /* We can reuse buffer as-is, just make sure it is local */
2431                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2432                         desc_cb->reuse_flag = 1;
2433                 else /* This page cannot be reused so discard it */
2434                         put_page(desc_cb->priv);
2435
2436                 ring_ptr_move_fw(ring, next_to_clean);
2437                 return 0;
2438         }
2439         u64_stats_update_begin(&ring->syncp);
2440         ring->stats.seg_pkt_cnt++;
2441         u64_stats_update_end(&ring->syncp);
2442
2443         ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2444         __skb_put(skb, ring->pull_len);
2445         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2446                             desc_cb);
2447         ring_ptr_move_fw(ring, next_to_clean);
2448
2449         return HNS3_NEED_ADD_FRAG;
2450 }
2451
2452 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2453                          struct sk_buff **out_skb, bool pending)
2454 {
2455         struct sk_buff *skb = *out_skb;
2456         struct sk_buff *head_skb = *out_skb;
2457         struct sk_buff *new_skb;
2458         struct hns3_desc_cb *desc_cb;
2459         struct hns3_desc *pre_desc;
2460         u32 bd_base_info;
2461         int pre_bd;
2462
2463         /* if there is pending bd, the SW param next_to_clean has moved
2464          * to next and the next is NULL
2465          */
2466         if (pending) {
2467                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2468                         ring->desc_num;
2469                 pre_desc = &ring->desc[pre_bd];
2470                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2471         } else {
2472                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2473         }
2474
2475         while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2476                 desc = &ring->desc[ring->next_to_clean];
2477                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2478                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2479                 if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
2480                         return -ENXIO;
2481
2482                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2483                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2484                                                  HNS3_RX_HEAD_SIZE);
2485                         if (unlikely(!new_skb)) {
2486                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2487                                            "alloc rx skb frag fail\n");
2488                                 return -ENXIO;
2489                         }
2490                         ring->frag_num = 0;
2491
2492                         if (ring->tail_skb) {
2493                                 ring->tail_skb->next = new_skb;
2494                                 ring->tail_skb = new_skb;
2495                         } else {
2496                                 skb_shinfo(skb)->frag_list = new_skb;
2497                                 ring->tail_skb = new_skb;
2498                         }
2499                 }
2500
2501                 if (ring->tail_skb) {
2502                         head_skb->truesize += hnae3_buf_size(ring);
2503                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2504                         head_skb->len += le16_to_cpu(desc->rx.size);
2505                         skb = ring->tail_skb;
2506                 }
2507
2508                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2509                 ring_ptr_move_fw(ring, next_to_clean);
2510                 ring->pending_buf++;
2511         }
2512
2513         return 0;
2514 }
2515
2516 static void hns3_set_gro_param(struct sk_buff *skb, u32 l234info,
2517                                u32 bd_base_info)
2518 {
2519         u16 gro_count;
2520         u32 l3_type;
2521
2522         gro_count = hnae3_get_field(l234info, HNS3_RXD_GRO_COUNT_M,
2523                                     HNS3_RXD_GRO_COUNT_S);
2524         /* if there is no HW GRO, do not set gro params */
2525         if (!gro_count)
2526                 return;
2527
2528         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
2529          * to skb_shinfo(skb)->gso_segs
2530          */
2531         NAPI_GRO_CB(skb)->count = gro_count;
2532
2533         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2534                                   HNS3_RXD_L3ID_S);
2535         if (l3_type == HNS3_L3_TYPE_IPV4)
2536                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2537         else if (l3_type == HNS3_L3_TYPE_IPV6)
2538                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2539         else
2540                 return;
2541
2542         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2543                                                     HNS3_RXD_GRO_SIZE_M,
2544                                                     HNS3_RXD_GRO_SIZE_S);
2545         if (skb_shinfo(skb)->gso_size)
2546                 tcp_gro_complete(skb);
2547 }
2548
2549 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2550                                      struct sk_buff *skb)
2551 {
2552         struct hnae3_handle *handle = ring->tqp->handle;
2553         enum pkt_hash_types rss_type;
2554         struct hns3_desc *desc;
2555         int last_bd;
2556
2557         /* When driver handle the rss type, ring->next_to_clean indicates the
2558          * first descriptor of next packet, need -1 here.
2559          */
2560         last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
2561         desc = &ring->desc[last_bd];
2562
2563         if (le32_to_cpu(desc->rx.rss_hash))
2564                 rss_type = handle->kinfo.rss_type;
2565         else
2566                 rss_type = PKT_HASH_TYPE_NONE;
2567
2568         skb_set_hash(skb, le32_to_cpu(desc->rx.rss_hash), rss_type);
2569 }
2570
2571 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2572                              struct sk_buff **out_skb)
2573 {
2574         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2575         struct sk_buff *skb = ring->skb;
2576         struct hns3_desc_cb *desc_cb;
2577         struct hns3_desc *desc;
2578         u32 bd_base_info;
2579         u32 l234info;
2580         int length;
2581         int ret;
2582
2583         desc = &ring->desc[ring->next_to_clean];
2584         desc_cb = &ring->desc_cb[ring->next_to_clean];
2585
2586         prefetch(desc);
2587
2588         length = le16_to_cpu(desc->rx.size);
2589         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2590
2591         /* Check valid BD */
2592         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2593                 return -ENXIO;
2594
2595         if (!skb)
2596                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2597
2598         /* Prefetch first cache line of first page
2599          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2600          * line size is 64B so need to prefetch twice to make it 128B. But in
2601          * actual we can have greater size of caches with 128B Level 1 cache
2602          * lines. In such a case, single fetch would suffice to cache in the
2603          * relevant part of the header.
2604          */
2605         prefetch(ring->va);
2606 #if L1_CACHE_BYTES < 128
2607         prefetch(ring->va + L1_CACHE_BYTES);
2608 #endif
2609
2610         if (!skb) {
2611                 ret = hns3_alloc_skb(ring, length, ring->va);
2612                 *out_skb = skb = ring->skb;
2613
2614                 if (ret < 0) /* alloc buffer fail */
2615                         return ret;
2616                 if (ret > 0) { /* need add frag */
2617                         ret = hns3_add_frag(ring, desc, &skb, false);
2618                         if (ret)
2619                                 return ret;
2620
2621                         /* As the head data may be changed when GRO enable, copy
2622                          * the head data in after other data rx completed
2623                          */
2624                         memcpy(skb->data, ring->va,
2625                                ALIGN(ring->pull_len, sizeof(long)));
2626                 }
2627         } else {
2628                 ret = hns3_add_frag(ring, desc, &skb, true);
2629                 if (ret)
2630                         return ret;
2631
2632                 /* As the head data may be changed when GRO enable, copy
2633                  * the head data in after other data rx completed
2634                  */
2635                 memcpy(skb->data, ring->va,
2636                        ALIGN(ring->pull_len, sizeof(long)));
2637         }
2638
2639         l234info = le32_to_cpu(desc->rx.l234_info);
2640         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2641
2642         /* Based on hw strategy, the tag offloaded will be stored at
2643          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2644          * in one layer tag case.
2645          */
2646         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2647                 u16 vlan_tag;
2648
2649                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2650                         __vlan_hwaccel_put_tag(skb,
2651                                                htons(ETH_P_8021Q),
2652                                                vlan_tag);
2653         }
2654
2655         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2656                 u64_stats_update_begin(&ring->syncp);
2657                 ring->stats.non_vld_descs++;
2658                 u64_stats_update_end(&ring->syncp);
2659
2660                 dev_kfree_skb_any(skb);
2661                 return -EINVAL;
2662         }
2663
2664         if (unlikely((!desc->rx.pkt_len) ||
2665                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2666                 u64_stats_update_begin(&ring->syncp);
2667                 ring->stats.err_pkt_len++;
2668                 u64_stats_update_end(&ring->syncp);
2669
2670                 dev_kfree_skb_any(skb);
2671                 return -EFAULT;
2672         }
2673
2674         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2675                 u64_stats_update_begin(&ring->syncp);
2676                 ring->stats.l2_err++;
2677                 u64_stats_update_end(&ring->syncp);
2678
2679                 dev_kfree_skb_any(skb);
2680                 return -EFAULT;
2681         }
2682
2683         u64_stats_update_begin(&ring->syncp);
2684         ring->stats.rx_pkts++;
2685         ring->stats.rx_bytes += skb->len;
2686         u64_stats_update_end(&ring->syncp);
2687
2688         ring->tqp_vector->rx_group.total_bytes += skb->len;
2689
2690         /* This is needed in order to enable forwarding support */
2691         hns3_set_gro_param(skb, l234info, bd_base_info);
2692
2693         hns3_rx_checksum(ring, skb, desc);
2694         *out_skb = skb;
2695         hns3_set_rx_skb_rss_type(ring, skb);
2696
2697         return 0;
2698 }
2699
2700 int hns3_clean_rx_ring(
2701                 struct hns3_enet_ring *ring, int budget,
2702                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2703 {
2704 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2705         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2706         int recv_pkts, recv_bds, clean_count, err;
2707         int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
2708         struct sk_buff *skb = ring->skb;
2709         int num;
2710
2711         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2712         rmb(); /* Make sure num taken effect before the other data is touched */
2713
2714         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2715         num -= unused_count;
2716
2717         while (recv_pkts < budget && recv_bds < num) {
2718                 /* Reuse or realloc buffers */
2719                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2720                         hns3_nic_alloc_rx_buffers(ring,
2721                                                   clean_count + unused_count);
2722                         clean_count = 0;
2723                         unused_count = hns3_desc_unused(ring) -
2724                                         ring->pending_buf;
2725                 }
2726
2727                 /* Poll one pkt */
2728                 err = hns3_handle_rx_bd(ring, &skb);
2729                 if (unlikely(!skb)) /* This fault cannot be repaired */
2730                         goto out;
2731
2732                 if (err == -ENXIO) { /* Do not get FE for the packet */
2733                         goto out;
2734                 } else if (unlikely(err)) {  /* Do jump the err */
2735                         recv_bds += ring->pending_buf;
2736                         clean_count += ring->pending_buf;
2737                         ring->skb = NULL;
2738                         ring->pending_buf = 0;
2739                         continue;
2740                 }
2741
2742                 /* Do update ip stack process */
2743                 skb->protocol = eth_type_trans(skb, netdev);
2744                 rx_fn(ring, skb);
2745                 recv_bds += ring->pending_buf;
2746                 clean_count += ring->pending_buf;
2747                 ring->skb = NULL;
2748                 ring->pending_buf = 0;
2749
2750                 recv_pkts++;
2751         }
2752
2753 out:
2754         /* Make all data has been write before submit */
2755         if (clean_count + unused_count > 0)
2756                 hns3_nic_alloc_rx_buffers(ring,
2757                                           clean_count + unused_count);
2758
2759         return recv_pkts;
2760 }
2761
2762 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2763 {
2764         struct hns3_enet_tqp_vector *tqp_vector =
2765                                         ring_group->ring->tqp_vector;
2766         enum hns3_flow_level_range new_flow_level;
2767         int packets_per_msecs;
2768         int bytes_per_msecs;
2769         u32 time_passed_ms;
2770         u16 new_int_gl;
2771
2772         if (!ring_group->coal.int_gl || !tqp_vector->last_jiffies)
2773                 return false;
2774
2775         if (ring_group->total_packets == 0) {
2776                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2777                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2778                 return true;
2779         }
2780
2781         /* Simple throttlerate management
2782          * 0-10MB/s   lower     (50000 ints/s)
2783          * 10-20MB/s   middle    (20000 ints/s)
2784          * 20-1249MB/s high      (18000 ints/s)
2785          * > 40000pps  ultra     (8000 ints/s)
2786          */
2787         new_flow_level = ring_group->coal.flow_level;
2788         new_int_gl = ring_group->coal.int_gl;
2789         time_passed_ms =
2790                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2791
2792         if (!time_passed_ms)
2793                 return false;
2794
2795         do_div(ring_group->total_packets, time_passed_ms);
2796         packets_per_msecs = ring_group->total_packets;
2797
2798         do_div(ring_group->total_bytes, time_passed_ms);
2799         bytes_per_msecs = ring_group->total_bytes;
2800
2801 #define HNS3_RX_LOW_BYTE_RATE 10000
2802 #define HNS3_RX_MID_BYTE_RATE 20000
2803
2804         switch (new_flow_level) {
2805         case HNS3_FLOW_LOW:
2806                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2807                         new_flow_level = HNS3_FLOW_MID;
2808                 break;
2809         case HNS3_FLOW_MID:
2810                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2811                         new_flow_level = HNS3_FLOW_HIGH;
2812                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2813                         new_flow_level = HNS3_FLOW_LOW;
2814                 break;
2815         case HNS3_FLOW_HIGH:
2816         case HNS3_FLOW_ULTRA:
2817         default:
2818                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2819                         new_flow_level = HNS3_FLOW_MID;
2820                 break;
2821         }
2822
2823 #define HNS3_RX_ULTRA_PACKET_RATE 40
2824
2825         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2826             &tqp_vector->rx_group == ring_group)
2827                 new_flow_level = HNS3_FLOW_ULTRA;
2828
2829         switch (new_flow_level) {
2830         case HNS3_FLOW_LOW:
2831                 new_int_gl = HNS3_INT_GL_50K;
2832                 break;
2833         case HNS3_FLOW_MID:
2834                 new_int_gl = HNS3_INT_GL_20K;
2835                 break;
2836         case HNS3_FLOW_HIGH:
2837                 new_int_gl = HNS3_INT_GL_18K;
2838                 break;
2839         case HNS3_FLOW_ULTRA:
2840                 new_int_gl = HNS3_INT_GL_8K;
2841                 break;
2842         default:
2843                 break;
2844         }
2845
2846         ring_group->total_bytes = 0;
2847         ring_group->total_packets = 0;
2848         ring_group->coal.flow_level = new_flow_level;
2849         if (new_int_gl != ring_group->coal.int_gl) {
2850                 ring_group->coal.int_gl = new_int_gl;
2851                 return true;
2852         }
2853         return false;
2854 }
2855
2856 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2857 {
2858         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2859         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2860         bool rx_update, tx_update;
2861
2862         /* update param every 1000ms */
2863         if (time_before(jiffies,
2864                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
2865                 return;
2866
2867         if (rx_group->coal.gl_adapt_enable) {
2868                 rx_update = hns3_get_new_int_gl(rx_group);
2869                 if (rx_update)
2870                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2871                                                        rx_group->coal.int_gl);
2872         }
2873
2874         if (tx_group->coal.gl_adapt_enable) {
2875                 tx_update = hns3_get_new_int_gl(&tqp_vector->tx_group);
2876                 if (tx_update)
2877                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2878                                                        tx_group->coal.int_gl);
2879         }
2880
2881         tqp_vector->last_jiffies = jiffies;
2882 }
2883
2884 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2885 {
2886         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
2887         struct hns3_enet_ring *ring;
2888         int rx_pkt_total = 0;
2889
2890         struct hns3_enet_tqp_vector *tqp_vector =
2891                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2892         bool clean_complete = true;
2893         int rx_budget;
2894
2895         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2896                 napi_complete(napi);
2897                 return 0;
2898         }
2899
2900         /* Since the actual Tx work is minimal, we can give the Tx a larger
2901          * budget and be more aggressive about cleaning up the Tx descriptors.
2902          */
2903         hns3_for_each_ring(ring, tqp_vector->tx_group)
2904                 hns3_clean_tx_ring(ring);
2905
2906         /* make sure rx ring budget not smaller than 1 */
2907         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2908
2909         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2910                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2911                                                     hns3_rx_skb);
2912
2913                 if (rx_cleaned >= rx_budget)
2914                         clean_complete = false;
2915
2916                 rx_pkt_total += rx_cleaned;
2917         }
2918
2919         tqp_vector->rx_group.total_packets += rx_pkt_total;
2920
2921         if (!clean_complete)
2922                 return budget;
2923
2924         if (napi_complete(napi) &&
2925             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2926                 hns3_update_new_int_gl(tqp_vector);
2927                 hns3_mask_vector_irq(tqp_vector, 1);
2928         }
2929
2930         return rx_pkt_total;
2931 }
2932
2933 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2934                                       struct hnae3_ring_chain_node *head)
2935 {
2936         struct pci_dev *pdev = tqp_vector->handle->pdev;
2937         struct hnae3_ring_chain_node *cur_chain = head;
2938         struct hnae3_ring_chain_node *chain;
2939         struct hns3_enet_ring *tx_ring;
2940         struct hns3_enet_ring *rx_ring;
2941
2942         tx_ring = tqp_vector->tx_group.ring;
2943         if (tx_ring) {
2944                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2945                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2946                               HNAE3_RING_TYPE_TX);
2947                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2948                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2949
2950                 cur_chain->next = NULL;
2951
2952                 while (tx_ring->next) {
2953                         tx_ring = tx_ring->next;
2954
2955                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2956                                              GFP_KERNEL);
2957                         if (!chain)
2958                                 goto err_free_chain;
2959
2960                         cur_chain->next = chain;
2961                         chain->tqp_index = tx_ring->tqp->tqp_index;
2962                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2963                                       HNAE3_RING_TYPE_TX);
2964                         hnae3_set_field(chain->int_gl_idx,
2965                                         HNAE3_RING_GL_IDX_M,
2966                                         HNAE3_RING_GL_IDX_S,
2967                                         HNAE3_RING_GL_TX);
2968
2969                         cur_chain = chain;
2970                 }
2971         }
2972
2973         rx_ring = tqp_vector->rx_group.ring;
2974         if (!tx_ring && rx_ring) {
2975                 cur_chain->next = NULL;
2976                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
2977                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2978                               HNAE3_RING_TYPE_RX);
2979                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2980                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2981
2982                 rx_ring = rx_ring->next;
2983         }
2984
2985         while (rx_ring) {
2986                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
2987                 if (!chain)
2988                         goto err_free_chain;
2989
2990                 cur_chain->next = chain;
2991                 chain->tqp_index = rx_ring->tqp->tqp_index;
2992                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2993                               HNAE3_RING_TYPE_RX);
2994                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2995                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2996
2997                 cur_chain = chain;
2998
2999                 rx_ring = rx_ring->next;
3000         }
3001
3002         return 0;
3003
3004 err_free_chain:
3005         cur_chain = head->next;
3006         while (cur_chain) {
3007                 chain = cur_chain->next;
3008                 devm_kfree(&pdev->dev, cur_chain);
3009                 cur_chain = chain;
3010         }
3011         head->next = NULL;
3012
3013         return -ENOMEM;
3014 }
3015
3016 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3017                                         struct hnae3_ring_chain_node *head)
3018 {
3019         struct pci_dev *pdev = tqp_vector->handle->pdev;
3020         struct hnae3_ring_chain_node *chain_tmp, *chain;
3021
3022         chain = head->next;
3023
3024         while (chain) {
3025                 chain_tmp = chain->next;
3026                 devm_kfree(&pdev->dev, chain);
3027                 chain = chain_tmp;
3028         }
3029 }
3030
3031 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3032                                    struct hns3_enet_ring *ring)
3033 {
3034         ring->next = group->ring;
3035         group->ring = ring;
3036
3037         group->count++;
3038 }
3039
3040 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3041 {
3042         struct pci_dev *pdev = priv->ae_handle->pdev;
3043         struct hns3_enet_tqp_vector *tqp_vector;
3044         int num_vectors = priv->vector_num;
3045         int numa_node;
3046         int vector_i;
3047
3048         numa_node = dev_to_node(&pdev->dev);
3049
3050         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3051                 tqp_vector = &priv->tqp_vector[vector_i];
3052                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3053                                 &tqp_vector->affinity_mask);
3054         }
3055 }
3056
3057 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3058 {
3059         struct hnae3_ring_chain_node vector_ring_chain;
3060         struct hnae3_handle *h = priv->ae_handle;
3061         struct hns3_enet_tqp_vector *tqp_vector;
3062         int ret = 0;
3063         int i;
3064
3065         hns3_nic_set_cpumask(priv);
3066
3067         for (i = 0; i < priv->vector_num; i++) {
3068                 tqp_vector = &priv->tqp_vector[i];
3069                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3070                 tqp_vector->num_tqps = 0;
3071         }
3072
3073         for (i = 0; i < h->kinfo.num_tqps; i++) {
3074                 u16 vector_i = i % priv->vector_num;
3075                 u16 tqp_num = h->kinfo.num_tqps;
3076
3077                 tqp_vector = &priv->tqp_vector[vector_i];
3078
3079                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3080                                        priv->ring_data[i].ring);
3081
3082                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3083                                        priv->ring_data[i + tqp_num].ring);
3084
3085                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3086                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3087                 tqp_vector->num_tqps++;
3088         }
3089
3090         for (i = 0; i < priv->vector_num; i++) {
3091                 tqp_vector = &priv->tqp_vector[i];
3092
3093                 tqp_vector->rx_group.total_bytes = 0;
3094                 tqp_vector->rx_group.total_packets = 0;
3095                 tqp_vector->tx_group.total_bytes = 0;
3096                 tqp_vector->tx_group.total_packets = 0;
3097                 tqp_vector->handle = h;
3098
3099                 ret = hns3_get_vector_ring_chain(tqp_vector,
3100                                                  &vector_ring_chain);
3101                 if (ret)
3102                         goto map_ring_fail;
3103
3104                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3105                         tqp_vector->vector_irq, &vector_ring_chain);
3106
3107                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3108
3109                 if (ret)
3110                         goto map_ring_fail;
3111
3112                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3113                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3114         }
3115
3116         return 0;
3117
3118 map_ring_fail:
3119         while (i--)
3120                 netif_napi_del(&priv->tqp_vector[i].napi);
3121
3122         return ret;
3123 }
3124
3125 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3126 {
3127 #define HNS3_VECTOR_PF_MAX_NUM          64
3128
3129         struct hnae3_handle *h = priv->ae_handle;
3130         struct hns3_enet_tqp_vector *tqp_vector;
3131         struct hnae3_vector_info *vector;
3132         struct pci_dev *pdev = h->pdev;
3133         u16 tqp_num = h->kinfo.num_tqps;
3134         u16 vector_num;
3135         int ret = 0;
3136         u16 i;
3137
3138         /* RSS size, cpu online and vector_num should be the same */
3139         /* Should consider 2p/4p later */
3140         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3141         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3142
3143         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3144                               GFP_KERNEL);
3145         if (!vector)
3146                 return -ENOMEM;
3147
3148         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3149
3150         priv->vector_num = vector_num;
3151         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3152                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3153                              GFP_KERNEL);
3154         if (!priv->tqp_vector) {
3155                 ret = -ENOMEM;
3156                 goto out;
3157         }
3158
3159         for (i = 0; i < priv->vector_num; i++) {
3160                 tqp_vector = &priv->tqp_vector[i];
3161                 tqp_vector->idx = i;
3162                 tqp_vector->mask_addr = vector[i].io_addr;
3163                 tqp_vector->vector_irq = vector[i].vector;
3164                 hns3_vector_gl_rl_init(tqp_vector, priv);
3165         }
3166
3167 out:
3168         devm_kfree(&pdev->dev, vector);
3169         return ret;
3170 }
3171
3172 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3173 {
3174         group->ring = NULL;
3175         group->count = 0;
3176 }
3177
3178 static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3179 {
3180         struct hnae3_ring_chain_node vector_ring_chain;
3181         struct hnae3_handle *h = priv->ae_handle;
3182         struct hns3_enet_tqp_vector *tqp_vector;
3183         int i, ret;
3184
3185         for (i = 0; i < priv->vector_num; i++) {
3186                 tqp_vector = &priv->tqp_vector[i];
3187
3188                 ret = hns3_get_vector_ring_chain(tqp_vector,
3189                                                  &vector_ring_chain);
3190                 if (ret)
3191                         return ret;
3192
3193                 ret = h->ae_algo->ops->unmap_ring_from_vector(h,
3194                         tqp_vector->vector_irq, &vector_ring_chain);
3195                 if (ret)
3196                         return ret;
3197
3198                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3199
3200                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3201                         irq_set_affinity_notifier(tqp_vector->vector_irq,
3202                                                   NULL);
3203                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3204                         free_irq(tqp_vector->vector_irq, tqp_vector);
3205                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3206                 }
3207
3208                 priv->ring_data[i].ring->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3209                 hns3_clear_ring_group(&tqp_vector->rx_group);
3210                 hns3_clear_ring_group(&tqp_vector->tx_group);
3211                 netif_napi_del(&priv->tqp_vector[i].napi);
3212         }
3213
3214         return 0;
3215 }
3216
3217 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3218 {
3219         struct hnae3_handle *h = priv->ae_handle;
3220         struct pci_dev *pdev = h->pdev;
3221         int i, ret;
3222
3223         for (i = 0; i < priv->vector_num; i++) {
3224                 struct hns3_enet_tqp_vector *tqp_vector;
3225
3226                 tqp_vector = &priv->tqp_vector[i];
3227                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3228                 if (ret)
3229                         return ret;
3230         }
3231
3232         devm_kfree(&pdev->dev, priv->tqp_vector);
3233         return 0;
3234 }
3235
3236 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3237                              int ring_type)
3238 {
3239         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3240         int queue_num = priv->ae_handle->kinfo.num_tqps;
3241         struct pci_dev *pdev = priv->ae_handle->pdev;
3242         struct hns3_enet_ring *ring;
3243
3244         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3245         if (!ring)
3246                 return -ENOMEM;
3247
3248         if (ring_type == HNAE3_RING_TYPE_TX) {
3249                 ring_data[q->tqp_index].ring = ring;
3250                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3251                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3252         } else {
3253                 ring_data[q->tqp_index + queue_num].ring = ring;
3254                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3255                 ring->io_base = q->io_base;
3256         }
3257
3258         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3259
3260         ring->tqp = q;
3261         ring->desc = NULL;
3262         ring->desc_cb = NULL;
3263         ring->dev = priv->dev;
3264         ring->desc_dma_addr = 0;
3265         ring->buf_size = q->buf_size;
3266         ring->desc_num = q->desc_num;
3267         ring->next_to_use = 0;
3268         ring->next_to_clean = 0;
3269
3270         return 0;
3271 }
3272
3273 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3274                               struct hns3_nic_priv *priv)
3275 {
3276         int ret;
3277
3278         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3279         if (ret)
3280                 return ret;
3281
3282         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3283         if (ret) {
3284                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3285                 return ret;
3286         }
3287
3288         return 0;
3289 }
3290
3291 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3292 {
3293         struct hnae3_handle *h = priv->ae_handle;
3294         struct pci_dev *pdev = h->pdev;
3295         int i, ret;
3296
3297         priv->ring_data =  devm_kzalloc(&pdev->dev,
3298                                         array3_size(h->kinfo.num_tqps,
3299                                                     sizeof(*priv->ring_data),
3300                                                     2),
3301                                         GFP_KERNEL);
3302         if (!priv->ring_data)
3303                 return -ENOMEM;
3304
3305         for (i = 0; i < h->kinfo.num_tqps; i++) {
3306                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3307                 if (ret)
3308                         goto err;
3309         }
3310
3311         return 0;
3312 err:
3313         while (i--) {
3314                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3315                 devm_kfree(priv->dev,
3316                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3317         }
3318
3319         devm_kfree(&pdev->dev, priv->ring_data);
3320         return ret;
3321 }
3322
3323 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3324 {
3325         struct hnae3_handle *h = priv->ae_handle;
3326         int i;
3327
3328         for (i = 0; i < h->kinfo.num_tqps; i++) {
3329                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3330                 devm_kfree(priv->dev,
3331                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3332         }
3333         devm_kfree(priv->dev, priv->ring_data);
3334 }
3335
3336 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3337 {
3338         int ret;
3339
3340         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3341                 return -EINVAL;
3342
3343         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
3344                                 GFP_KERNEL);
3345         if (!ring->desc_cb) {
3346                 ret = -ENOMEM;
3347                 goto out;
3348         }
3349
3350         ret = hns3_alloc_desc(ring);
3351         if (ret)
3352                 goto out_with_desc_cb;
3353
3354         if (!HNAE3_IS_TX_RING(ring)) {
3355                 ret = hns3_alloc_ring_buffers(ring);
3356                 if (ret)
3357                         goto out_with_desc;
3358         }
3359
3360         return 0;
3361
3362 out_with_desc:
3363         hns3_free_desc(ring);
3364 out_with_desc_cb:
3365         kfree(ring->desc_cb);
3366         ring->desc_cb = NULL;
3367 out:
3368         return ret;
3369 }
3370
3371 static void hns3_fini_ring(struct hns3_enet_ring *ring)
3372 {
3373         hns3_free_desc(ring);
3374         kfree(ring->desc_cb);
3375         ring->desc_cb = NULL;
3376         ring->next_to_clean = 0;
3377         ring->next_to_use = 0;
3378 }
3379
3380 static int hns3_buf_size2type(u32 buf_size)
3381 {
3382         int bd_size_type;
3383
3384         switch (buf_size) {
3385         case 512:
3386                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3387                 break;
3388         case 1024:
3389                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3390                 break;
3391         case 2048:
3392                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3393                 break;
3394         case 4096:
3395                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3396                 break;
3397         default:
3398                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3399         }
3400
3401         return bd_size_type;
3402 }
3403
3404 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3405 {
3406         dma_addr_t dma = ring->desc_dma_addr;
3407         struct hnae3_queue *q = ring->tqp;
3408
3409         if (!HNAE3_IS_TX_RING(ring)) {
3410                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3411                                (u32)dma);
3412                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3413                                (u32)((dma >> 31) >> 1));
3414
3415                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3416                                hns3_buf_size2type(ring->buf_size));
3417                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3418                                ring->desc_num / 8 - 1);
3419
3420         } else {
3421                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3422                                (u32)dma);
3423                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3424                                (u32)((dma >> 31) >> 1));
3425
3426                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3427                                ring->desc_num / 8 - 1);
3428         }
3429 }
3430
3431 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3432 {
3433         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3434         int i;
3435
3436         for (i = 0; i < HNAE3_MAX_TC; i++) {
3437                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3438                 int j;
3439
3440                 if (!tc_info->enable)
3441                         continue;
3442
3443                 for (j = 0; j < tc_info->tqp_count; j++) {
3444                         struct hnae3_queue *q;
3445
3446                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3447                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3448                                        tc_info->tc);
3449                 }
3450         }
3451 }
3452
3453 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3454 {
3455         struct hnae3_handle *h = priv->ae_handle;
3456         int ring_num = h->kinfo.num_tqps * 2;
3457         int i, j;
3458         int ret;
3459
3460         for (i = 0; i < ring_num; i++) {
3461                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3462                 if (ret) {
3463                         dev_err(priv->dev,
3464                                 "Alloc ring memory fail! ret=%d\n", ret);
3465                         goto out_when_alloc_ring_memory;
3466                 }
3467
3468                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3469         }
3470
3471         return 0;
3472
3473 out_when_alloc_ring_memory:
3474         for (j = i - 1; j >= 0; j--)
3475                 hns3_fini_ring(priv->ring_data[j].ring);
3476
3477         return -ENOMEM;
3478 }
3479
3480 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3481 {
3482         struct hnae3_handle *h = priv->ae_handle;
3483         int i;
3484
3485         for (i = 0; i < h->kinfo.num_tqps; i++) {
3486                 hns3_fini_ring(priv->ring_data[i].ring);
3487                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3488         }
3489         return 0;
3490 }
3491
3492 /* Set mac addr if it is configured. or leave it to the AE driver */
3493 static int hns3_init_mac_addr(struct net_device *netdev, bool init)
3494 {
3495         struct hns3_nic_priv *priv = netdev_priv(netdev);
3496         struct hnae3_handle *h = priv->ae_handle;
3497         u8 mac_addr_temp[ETH_ALEN];
3498         int ret = 0;
3499
3500         if (h->ae_algo->ops->get_mac_addr && init) {
3501                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3502                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3503         }
3504
3505         /* Check if the MAC address is valid, if not get a random one */
3506         if (!is_valid_ether_addr(netdev->dev_addr)) {
3507                 eth_hw_addr_random(netdev);
3508                 dev_warn(priv->dev, "using random MAC address %pM\n",
3509                          netdev->dev_addr);
3510         }
3511
3512         if (h->ae_algo->ops->set_mac_addr)
3513                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3514
3515         return ret;
3516 }
3517
3518 static int hns3_restore_fd_rules(struct net_device *netdev)
3519 {
3520         struct hnae3_handle *h = hns3_get_handle(netdev);
3521         int ret = 0;
3522
3523         if (h->ae_algo->ops->restore_fd_rules)
3524                 ret = h->ae_algo->ops->restore_fd_rules(h);
3525
3526         return ret;
3527 }
3528
3529 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3530 {
3531         struct hnae3_handle *h = hns3_get_handle(netdev);
3532
3533         if (h->ae_algo->ops->del_all_fd_entries)
3534                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3535 }
3536
3537 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3538 {
3539         struct hns3_nic_priv *priv = netdev_priv(netdev);
3540
3541         priv->ops.fill_desc = hns3_fill_desc;
3542         if ((netdev->features & NETIF_F_TSO) ||
3543             (netdev->features & NETIF_F_TSO6))
3544                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3545         else
3546                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3547 }
3548
3549 static int hns3_client_start(struct hnae3_handle *handle)
3550 {
3551         if (!handle->ae_algo->ops->client_start)
3552                 return 0;
3553
3554         return handle->ae_algo->ops->client_start(handle);
3555 }
3556
3557 static void hns3_client_stop(struct hnae3_handle *handle)
3558 {
3559         if (!handle->ae_algo->ops->client_stop)
3560                 return;
3561
3562         handle->ae_algo->ops->client_stop(handle);
3563 }
3564
3565 static int hns3_client_init(struct hnae3_handle *handle)
3566 {
3567         struct pci_dev *pdev = handle->pdev;
3568         u16 alloc_tqps, max_rss_size;
3569         struct hns3_nic_priv *priv;
3570         struct net_device *netdev;
3571         int ret;
3572
3573         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3574                                                     &max_rss_size);
3575         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3576         if (!netdev)
3577                 return -ENOMEM;
3578
3579         priv = netdev_priv(netdev);
3580         priv->dev = &pdev->dev;
3581         priv->netdev = netdev;
3582         priv->ae_handle = handle;
3583         priv->tx_timeout_count = 0;
3584
3585         handle->kinfo.netdev = netdev;
3586         handle->priv = (void *)priv;
3587
3588         hns3_init_mac_addr(netdev, true);
3589
3590         hns3_set_default_feature(netdev);
3591
3592         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3593         netdev->priv_flags |= IFF_UNICAST_FLT;
3594         netdev->netdev_ops = &hns3_nic_netdev_ops;
3595         SET_NETDEV_DEV(netdev, &pdev->dev);
3596         hns3_ethtool_set_ops(netdev);
3597         hns3_nic_set_priv_ops(netdev);
3598
3599         /* Carrier off reporting is important to ethtool even BEFORE open */
3600         netif_carrier_off(netdev);
3601
3602         ret = hns3_get_ring_config(priv);
3603         if (ret) {
3604                 ret = -ENOMEM;
3605                 goto out_get_ring_cfg;
3606         }
3607
3608         ret = hns3_nic_alloc_vector_data(priv);
3609         if (ret) {
3610                 ret = -ENOMEM;
3611                 goto out_alloc_vector_data;
3612         }
3613
3614         ret = hns3_nic_init_vector_data(priv);
3615         if (ret) {
3616                 ret = -ENOMEM;
3617                 goto out_init_vector_data;
3618         }
3619
3620         ret = hns3_init_all_ring(priv);
3621         if (ret) {
3622                 ret = -ENOMEM;
3623                 goto out_init_ring_data;
3624         }
3625
3626         ret = register_netdev(netdev);
3627         if (ret) {
3628                 dev_err(priv->dev, "probe register netdev fail!\n");
3629                 goto out_reg_netdev_fail;
3630         }
3631
3632         ret = hns3_client_start(handle);
3633         if (ret) {
3634                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
3635                         goto out_reg_netdev_fail;
3636         }
3637
3638         hns3_dcbnl_setup(handle);
3639
3640         hns3_dbg_init(handle);
3641
3642         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
3643         netdev->max_mtu = HNS3_MAX_MTU;
3644
3645         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
3646
3647         return ret;
3648
3649 out_reg_netdev_fail:
3650 out_init_ring_data:
3651         (void)hns3_nic_uninit_vector_data(priv);
3652 out_init_vector_data:
3653         hns3_nic_dealloc_vector_data(priv);
3654 out_alloc_vector_data:
3655         priv->ring_data = NULL;
3656 out_get_ring_cfg:
3657         priv->ae_handle = NULL;
3658         free_netdev(netdev);
3659         return ret;
3660 }
3661
3662 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3663 {
3664         struct net_device *netdev = handle->kinfo.netdev;
3665         struct hns3_nic_priv *priv = netdev_priv(netdev);
3666         int ret;
3667
3668         hns3_client_stop(handle);
3669
3670         hns3_remove_hw_addr(netdev);
3671
3672         if (netdev->reg_state != NETREG_UNINITIALIZED)
3673                 unregister_netdev(netdev);
3674
3675         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
3676                 netdev_warn(netdev, "already uninitialized\n");
3677                 goto out_netdev_free;
3678         }
3679
3680         hns3_del_all_fd_rules(netdev, true);
3681
3682         hns3_force_clear_all_rx_ring(handle);
3683
3684         ret = hns3_nic_uninit_vector_data(priv);
3685         if (ret)
3686                 netdev_err(netdev, "uninit vector error\n");
3687
3688         ret = hns3_nic_dealloc_vector_data(priv);
3689         if (ret)
3690                 netdev_err(netdev, "dealloc vector error\n");
3691
3692         ret = hns3_uninit_all_ring(priv);
3693         if (ret)
3694                 netdev_err(netdev, "uninit ring error\n");
3695
3696         hns3_put_ring_config(priv);
3697
3698         hns3_dbg_uninit(handle);
3699
3700         priv->ring_data = NULL;
3701
3702 out_netdev_free:
3703         free_netdev(netdev);
3704 }
3705
3706 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3707 {
3708         struct net_device *netdev = handle->kinfo.netdev;
3709
3710         if (!netdev)
3711                 return;
3712
3713         if (linkup) {
3714                 netif_carrier_on(netdev);
3715                 netif_tx_wake_all_queues(netdev);
3716                 netdev_info(netdev, "link up\n");
3717         } else {
3718                 netif_carrier_off(netdev);
3719                 netif_tx_stop_all_queues(netdev);
3720                 netdev_info(netdev, "link down\n");
3721         }
3722 }
3723
3724 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3725 {
3726         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3727         struct net_device *ndev = kinfo->netdev;
3728         bool if_running;
3729         int ret;
3730
3731         if (tc > HNAE3_MAX_TC)
3732                 return -EINVAL;
3733
3734         if (!ndev)
3735                 return -ENODEV;
3736
3737         if_running = netif_running(ndev);
3738
3739         if (if_running) {
3740                 (void)hns3_nic_net_stop(ndev);
3741                 msleep(100);
3742         }
3743
3744         ret = (kinfo->dcb_ops && kinfo->dcb_ops->map_update) ?
3745                 kinfo->dcb_ops->map_update(handle) : -EOPNOTSUPP;
3746         if (ret)
3747                 goto err_out;
3748
3749         ret = hns3_nic_set_real_num_queue(ndev);
3750
3751 err_out:
3752         if (if_running)
3753                 (void)hns3_nic_net_open(ndev);
3754
3755         return ret;
3756 }
3757
3758 static int hns3_recover_hw_addr(struct net_device *ndev)
3759 {
3760         struct netdev_hw_addr_list *list;
3761         struct netdev_hw_addr *ha, *tmp;
3762         int ret = 0;
3763
3764         /* go through and sync uc_addr entries to the device */
3765         list = &ndev->uc;
3766         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3767                 ret = hns3_nic_uc_sync(ndev, ha->addr);
3768                 if (ret)
3769                         return ret;
3770         }
3771
3772         /* go through and sync mc_addr entries to the device */
3773         list = &ndev->mc;
3774         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3775                 ret = hns3_nic_mc_sync(ndev, ha->addr);
3776                 if (ret)
3777                         return ret;
3778         }
3779
3780         return ret;
3781 }
3782
3783 static void hns3_remove_hw_addr(struct net_device *netdev)
3784 {
3785         struct netdev_hw_addr_list *list;
3786         struct netdev_hw_addr *ha, *tmp;
3787
3788         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
3789
3790         /* go through and unsync uc_addr entries to the device */
3791         list = &netdev->uc;
3792         list_for_each_entry_safe(ha, tmp, &list->list, list)
3793                 hns3_nic_uc_unsync(netdev, ha->addr);
3794
3795         /* go through and unsync mc_addr entries to the device */
3796         list = &netdev->mc;
3797         list_for_each_entry_safe(ha, tmp, &list->list, list)
3798                 if (ha->refcount > 1)
3799                         hns3_nic_mc_unsync(netdev, ha->addr);
3800 }
3801
3802 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3803 {
3804         while (ring->next_to_clean != ring->next_to_use) {
3805                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3806                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3807                 ring_ptr_move_fw(ring, next_to_clean);
3808         }
3809 }
3810
3811 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3812 {
3813         struct hns3_desc_cb res_cbs;
3814         int ret;
3815
3816         while (ring->next_to_use != ring->next_to_clean) {
3817                 /* When a buffer is not reused, it's memory has been
3818                  * freed in hns3_handle_rx_bd or will be freed by
3819                  * stack, so we need to replace the buffer here.
3820                  */
3821                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3822                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3823                         if (ret) {
3824                                 u64_stats_update_begin(&ring->syncp);
3825                                 ring->stats.sw_err_cnt++;
3826                                 u64_stats_update_end(&ring->syncp);
3827                                 /* if alloc new buffer fail, exit directly
3828                                  * and reclear in up flow.
3829                                  */
3830                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3831                                             "reserve buffer map failed, ret = %d\n",
3832                                             ret);
3833                                 return ret;
3834                         }
3835                         hns3_replace_buffer(ring, ring->next_to_use,
3836                                             &res_cbs);
3837                 }
3838                 ring_ptr_move_fw(ring, next_to_use);
3839         }
3840
3841         return 0;
3842 }
3843
3844 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3845 {
3846         while (ring->next_to_use != ring->next_to_clean) {
3847                 /* When a buffer is not reused, it's memory has been
3848                  * freed in hns3_handle_rx_bd or will be freed by
3849                  * stack, so only need to unmap the buffer here.
3850                  */
3851                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3852                         hns3_unmap_buffer(ring,
3853                                           &ring->desc_cb[ring->next_to_use]);
3854                         ring->desc_cb[ring->next_to_use].dma = 0;
3855                 }
3856
3857                 ring_ptr_move_fw(ring, next_to_use);
3858         }
3859 }
3860
3861 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3862 {
3863         struct net_device *ndev = h->kinfo.netdev;
3864         struct hns3_nic_priv *priv = netdev_priv(ndev);
3865         struct hns3_enet_ring *ring;
3866         u32 i;
3867
3868         for (i = 0; i < h->kinfo.num_tqps; i++) {
3869                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3870                 hns3_force_clear_rx_ring(ring);
3871         }
3872 }
3873
3874 static void hns3_clear_all_ring(struct hnae3_handle *h)
3875 {
3876         struct net_device *ndev = h->kinfo.netdev;
3877         struct hns3_nic_priv *priv = netdev_priv(ndev);
3878         u32 i;
3879
3880         for (i = 0; i < h->kinfo.num_tqps; i++) {
3881                 struct netdev_queue *dev_queue;
3882                 struct hns3_enet_ring *ring;
3883
3884                 ring = priv->ring_data[i].ring;
3885                 hns3_clear_tx_ring(ring);
3886                 dev_queue = netdev_get_tx_queue(ndev,
3887                                                 priv->ring_data[i].queue_index);
3888                 netdev_tx_reset_queue(dev_queue);
3889
3890                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3891                 /* Continue to clear other rings even if clearing some
3892                  * rings failed.
3893                  */
3894                 hns3_clear_rx_ring(ring);
3895         }
3896 }
3897
3898 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3899 {
3900         struct net_device *ndev = h->kinfo.netdev;
3901         struct hns3_nic_priv *priv = netdev_priv(ndev);
3902         struct hns3_enet_ring *rx_ring;
3903         int i, j;
3904         int ret;
3905
3906         for (i = 0; i < h->kinfo.num_tqps; i++) {
3907                 ret = h->ae_algo->ops->reset_queue(h, i);
3908                 if (ret)
3909                         return ret;
3910
3911                 hns3_init_ring_hw(priv->ring_data[i].ring);
3912
3913                 /* We need to clear tx ring here because self test will
3914                  * use the ring and will not run down before up
3915                  */
3916                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3917                 priv->ring_data[i].ring->next_to_clean = 0;
3918                 priv->ring_data[i].ring->next_to_use = 0;
3919
3920                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3921                 hns3_init_ring_hw(rx_ring);
3922                 ret = hns3_clear_rx_ring(rx_ring);
3923                 if (ret)
3924                         return ret;
3925
3926                 /* We can not know the hardware head and tail when this
3927                  * function is called in reset flow, so we reuse all desc.
3928                  */
3929                 for (j = 0; j < rx_ring->desc_num; j++)
3930                         hns3_reuse_buffer(rx_ring, j);
3931
3932                 rx_ring->next_to_clean = 0;
3933                 rx_ring->next_to_use = 0;
3934         }
3935
3936         hns3_init_tx_ring_tc(priv);
3937
3938         return 0;
3939 }
3940
3941 static void hns3_store_coal(struct hns3_nic_priv *priv)
3942 {
3943         /* ethtool only support setting and querying one coal
3944          * configuation for now, so save the vector 0' coal
3945          * configuation here in order to restore it.
3946          */
3947         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3948                sizeof(struct hns3_enet_coalesce));
3949         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3950                sizeof(struct hns3_enet_coalesce));
3951 }
3952
3953 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3954 {
3955         u16 vector_num = priv->vector_num;
3956         int i;
3957
3958         for (i = 0; i < vector_num; i++) {
3959                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3960                        sizeof(struct hns3_enet_coalesce));
3961                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3962                        sizeof(struct hns3_enet_coalesce));
3963         }
3964 }
3965
3966 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3967 {
3968         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
3969         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3970         struct net_device *ndev = kinfo->netdev;
3971         struct hns3_nic_priv *priv = netdev_priv(ndev);
3972
3973         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
3974                 return 0;
3975
3976         /* it is cumbersome for hardware to pick-and-choose entries for deletion
3977          * from table space. Hence, for function reset software intervention is
3978          * required to delete the entries
3979          */
3980         if (hns3_dev_ongoing_func_reset(ae_dev)) {
3981                 hns3_remove_hw_addr(ndev);
3982                 hns3_del_all_fd_rules(ndev, false);
3983         }
3984
3985         if (!netif_running(ndev))
3986                 return 0;
3987
3988         return hns3_nic_net_stop(ndev);
3989 }
3990
3991 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
3992 {
3993         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3994         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
3995         int ret = 0;
3996
3997         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
3998
3999         if (netif_running(kinfo->netdev)) {
4000                 ret = hns3_nic_net_open(kinfo->netdev);
4001                 if (ret) {
4002                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4003                         netdev_err(kinfo->netdev,
4004                                    "hns net up fail, ret=%d!\n", ret);
4005                         return ret;
4006                 }
4007         }
4008
4009         return ret;
4010 }
4011
4012 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4013 {
4014         struct net_device *netdev = handle->kinfo.netdev;
4015         struct hns3_nic_priv *priv = netdev_priv(netdev);
4016         bool vlan_filter_enable;
4017         int ret;
4018
4019         ret = hns3_init_mac_addr(netdev, false);
4020         if (ret)
4021                 return ret;
4022
4023         ret = hns3_recover_hw_addr(netdev);
4024         if (ret)
4025                 return ret;
4026
4027         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4028         if (ret)
4029                 return ret;
4030
4031         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4032         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4033
4034         /* Hardware table is only clear when pf resets */
4035         if (!(handle->flags & HNAE3_SUPPORT_VF)) {
4036                 ret = hns3_restore_vlan(netdev);
4037                 if (ret)
4038                         return ret;
4039         }
4040
4041         ret = hns3_restore_fd_rules(netdev);
4042         if (ret)
4043                 return ret;
4044
4045         /* Carrier off reporting is important to ethtool even BEFORE open */
4046         netif_carrier_off(netdev);
4047
4048         ret = hns3_nic_alloc_vector_data(priv);
4049         if (ret)
4050                 return ret;
4051
4052         hns3_restore_coal(priv);
4053
4054         ret = hns3_nic_init_vector_data(priv);
4055         if (ret)
4056                 goto err_dealloc_vector;
4057
4058         ret = hns3_init_all_ring(priv);
4059         if (ret)
4060                 goto err_uninit_vector;
4061
4062         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4063
4064         return ret;
4065
4066 err_uninit_vector:
4067         hns3_nic_uninit_vector_data(priv);
4068         priv->ring_data = NULL;
4069 err_dealloc_vector:
4070         hns3_nic_dealloc_vector_data(priv);
4071
4072         return ret;
4073 }
4074
4075 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4076 {
4077         struct net_device *netdev = handle->kinfo.netdev;
4078         struct hns3_nic_priv *priv = netdev_priv(netdev);
4079         int ret;
4080
4081         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4082                 netdev_warn(netdev, "already uninitialized\n");
4083                 return 0;
4084         }
4085
4086         hns3_force_clear_all_rx_ring(handle);
4087
4088         ret = hns3_nic_uninit_vector_data(priv);
4089         if (ret) {
4090                 netdev_err(netdev, "uninit vector error\n");
4091                 return ret;
4092         }
4093
4094         hns3_store_coal(priv);
4095
4096         ret = hns3_nic_dealloc_vector_data(priv);
4097         if (ret)
4098                 netdev_err(netdev, "dealloc vector error\n");
4099
4100         ret = hns3_uninit_all_ring(priv);
4101         if (ret)
4102                 netdev_err(netdev, "uninit ring error\n");
4103
4104         clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
4105
4106         return ret;
4107 }
4108
4109 static int hns3_reset_notify(struct hnae3_handle *handle,
4110                              enum hnae3_reset_notify_type type)
4111 {
4112         int ret = 0;
4113
4114         switch (type) {
4115         case HNAE3_UP_CLIENT:
4116                 ret = hns3_reset_notify_up_enet(handle);
4117                 break;
4118         case HNAE3_DOWN_CLIENT:
4119                 ret = hns3_reset_notify_down_enet(handle);
4120                 break;
4121         case HNAE3_INIT_CLIENT:
4122                 ret = hns3_reset_notify_init_enet(handle);
4123                 break;
4124         case HNAE3_UNINIT_CLIENT:
4125                 ret = hns3_reset_notify_uninit_enet(handle);
4126                 break;
4127         default:
4128                 break;
4129         }
4130
4131         return ret;
4132 }
4133
4134 static int hns3_modify_tqp_num(struct net_device *netdev, u16 new_tqp_num)
4135 {
4136         struct hns3_nic_priv *priv = netdev_priv(netdev);
4137         struct hnae3_handle *h = hns3_get_handle(netdev);
4138         int ret;
4139
4140         ret = h->ae_algo->ops->set_channels(h, new_tqp_num);
4141         if (ret)
4142                 return ret;
4143
4144         ret = hns3_get_ring_config(priv);
4145         if (ret)
4146                 return ret;
4147
4148         ret = hns3_nic_alloc_vector_data(priv);
4149         if (ret)
4150                 goto err_alloc_vector;
4151
4152         hns3_restore_coal(priv);
4153
4154         ret = hns3_nic_init_vector_data(priv);
4155         if (ret)
4156                 goto err_uninit_vector;
4157
4158         ret = hns3_init_all_ring(priv);
4159         if (ret)
4160                 goto err_put_ring;
4161
4162         return 0;
4163
4164 err_put_ring:
4165         hns3_put_ring_config(priv);
4166 err_uninit_vector:
4167         hns3_nic_uninit_vector_data(priv);
4168 err_alloc_vector:
4169         hns3_nic_dealloc_vector_data(priv);
4170         return ret;
4171 }
4172
4173 static int hns3_adjust_tqps_num(u8 num_tc, u32 new_tqp_num)
4174 {
4175         return (new_tqp_num / num_tc) * num_tc;
4176 }
4177
4178 int hns3_set_channels(struct net_device *netdev,
4179                       struct ethtool_channels *ch)
4180 {
4181         struct hns3_nic_priv *priv = netdev_priv(netdev);
4182         struct hnae3_handle *h = hns3_get_handle(netdev);
4183         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4184         bool if_running = netif_running(netdev);
4185         u32 new_tqp_num = ch->combined_count;
4186         u16 org_tqp_num;
4187         int ret;
4188
4189         if (ch->rx_count || ch->tx_count)
4190                 return -EINVAL;
4191
4192         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4193             new_tqp_num < kinfo->num_tc) {
4194                 dev_err(&netdev->dev,
4195                         "Change tqps fail, the tqp range is from %d to %d",
4196                         kinfo->num_tc,
4197                         hns3_get_max_available_channels(h));
4198                 return -EINVAL;
4199         }
4200
4201         new_tqp_num = hns3_adjust_tqps_num(kinfo->num_tc, new_tqp_num);
4202         if (kinfo->num_tqps == new_tqp_num)
4203                 return 0;
4204
4205         if (if_running)
4206                 hns3_nic_net_stop(netdev);
4207
4208         ret = hns3_nic_uninit_vector_data(priv);
4209         if (ret) {
4210                 dev_err(&netdev->dev,
4211                         "Unbind vector with tqp fail, nothing is changed");
4212                 goto open_netdev;
4213         }
4214
4215         hns3_store_coal(priv);
4216
4217         hns3_nic_dealloc_vector_data(priv);
4218
4219         hns3_uninit_all_ring(priv);
4220         hns3_put_ring_config(priv);
4221
4222         org_tqp_num = h->kinfo.num_tqps;
4223         ret = hns3_modify_tqp_num(netdev, new_tqp_num);
4224         if (ret) {
4225                 ret = hns3_modify_tqp_num(netdev, org_tqp_num);
4226                 if (ret) {
4227                         /* If revert to old tqp failed, fatal error occurred */
4228                         dev_err(&netdev->dev,
4229                                 "Revert to old tqp num fail, ret=%d", ret);
4230                         return ret;
4231                 }
4232                 dev_info(&netdev->dev,
4233                          "Change tqp num fail, Revert to old tqp num");
4234         }
4235
4236 open_netdev:
4237         if (if_running)
4238                 hns3_nic_net_open(netdev);
4239
4240         return ret;
4241 }
4242
4243 static const struct hnae3_client_ops client_ops = {
4244         .init_instance = hns3_client_init,
4245         .uninit_instance = hns3_client_uninit,
4246         .link_status_change = hns3_link_status_change,
4247         .setup_tc = hns3_client_setup_tc,
4248         .reset_notify = hns3_reset_notify,
4249 };
4250
4251 /* hns3_init_module - Driver registration routine
4252  * hns3_init_module is the first routine called when the driver is
4253  * loaded. All it does is register with the PCI subsystem.
4254  */
4255 static int __init hns3_init_module(void)
4256 {
4257         int ret;
4258
4259         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4260         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4261
4262         client.type = HNAE3_CLIENT_KNIC;
4263         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4264                  hns3_driver_name);
4265
4266         client.ops = &client_ops;
4267
4268         INIT_LIST_HEAD(&client.node);
4269
4270         hns3_dbg_register_debugfs(hns3_driver_name);
4271
4272         ret = hnae3_register_client(&client);
4273         if (ret)
4274                 goto err_reg_client;
4275
4276         ret = pci_register_driver(&hns3_driver);
4277         if (ret)
4278                 goto err_reg_driver;
4279
4280         return ret;
4281
4282 err_reg_driver:
4283         hnae3_unregister_client(&client);
4284 err_reg_client:
4285         hns3_dbg_unregister_debugfs();
4286         return ret;
4287 }
4288 module_init(hns3_init_module);
4289
4290 /* hns3_exit_module - Driver exit cleanup routine
4291  * hns3_exit_module is called just before the driver is removed
4292  * from memory.
4293  */
4294 static void __exit hns3_exit_module(void)
4295 {
4296         pci_unregister_driver(&hns3_driver);
4297         hnae3_unregister_client(&client);
4298         hns3_dbg_unregister_debugfs();
4299 }
4300 module_exit(hns3_exit_module);
4301
4302 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4303 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4304 MODULE_LICENSE("GPL");
4305 MODULE_ALIAS("pci:hns-nic");
4306 MODULE_VERSION(HNS3_MOD_VERSION);