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 | HNAE3_BPE;
 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         /* User mode Promisc mode enable and vlan filtering is disabled to
 545          * let all packets in. MAC-VLAN Table overflow Promisc enabled and
 546          * vlan fitering is enabled
 547          */
 548         hns3_enable_vlan_filter(netdev, new_flags & HNAE3_VLAN_FLTR);
 549         h->netdev_flags = new_flags;
 550         hns3_update_promisc_mode(netdev, 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 sk_buff *new_skb = NULL;
1137         struct skb_frag_struct *frag;
1138         int bdnum_for_frag;
1139         int frag_num;
1140         int buf_num;
1141         int size;
1142         int i;
1143
1144         size = skb_headlen(skb);
1145         buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1146
1147         frag_num = skb_shinfo(skb)->nr_frags;
1148         for (i = 0; i < frag_num; i++) {
1149                 frag = &skb_shinfo(skb)->frags[i];
1150                 size = skb_frag_size(frag);
1151                 bdnum_for_frag =
1152                         (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1153                 if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
1154                         return -ENOMEM;
1155
1156                 buf_num += bdnum_for_frag;
1157         }
1158
1159         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1160                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1161                 if (ring_space(ring) < buf_num)
1162                         return -EBUSY;
1163                 /* manual split the send packet */
1164                 new_skb = skb_copy(skb, GFP_ATOMIC);
1165                 if (!new_skb)
1166                         return -ENOMEM;
1167                 dev_kfree_skb_any(skb);
1168                 *out_skb = new_skb;
1169         }
1170
1171         if (unlikely(ring_space(ring) < buf_num))
1172                 return -EBUSY;
1173
1174         *bnum = buf_num;
1175         return 0;
1176 }
1177
1178 static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
1179                                   struct hns3_enet_ring *ring)
1180 {
1181         struct sk_buff *skb = *out_skb;
1182         struct sk_buff *new_skb = NULL;
1183         int buf_num;
1184
1185         /* No. of segments (plus a header) */
1186         buf_num = skb_shinfo(skb)->nr_frags + 1;
1187
1188         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1189                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1190                 if (ring_space(ring) < buf_num)
1191                         return -EBUSY;
1192                 /* manual split the send packet */
1193                 new_skb = skb_copy(skb, GFP_ATOMIC);
1194                 if (!new_skb)
1195                         return -ENOMEM;
1196                 dev_kfree_skb_any(skb);
1197                 *out_skb = new_skb;
1198         }
1199
1200         if (unlikely(ring_space(ring) < buf_num))
1201                 return -EBUSY;
1202
1203         *bnum = buf_num;
1204
1205         return 0;
1206 }
1207
1208 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1209 {
1210         struct device *dev = ring_to_dev(ring);
1211         unsigned int i;
1212
1213         for (i = 0; i < ring->desc_num; i++) {
1214                 /* check if this is where we started */
1215                 if (ring->next_to_use == next_to_use_orig)
1216                         break;
1217
1218                 /* unmap the descriptor dma address */
1219                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1220                         dma_unmap_single(dev,
1221                                          ring->desc_cb[ring->next_to_use].dma,
1222                                         ring->desc_cb[ring->next_to_use].length,
1223                                         DMA_TO_DEVICE);
1224                 else if (ring->desc_cb[ring->next_to_use].length)
1225                         dma_unmap_page(dev,
1226                                        ring->desc_cb[ring->next_to_use].dma,
1227                                        ring->desc_cb[ring->next_to_use].length,
1228                                        DMA_TO_DEVICE);
1229
1230                 ring->desc_cb[ring->next_to_use].length = 0;
1231
1232                 /* rollback one */
1233                 ring_ptr_move_bw(ring, next_to_use);
1234         }
1235 }
1236
1237 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1238 {
1239         struct hns3_nic_priv *priv = netdev_priv(netdev);
1240         struct hns3_nic_ring_data *ring_data =
1241                 &tx_ring_data(priv, skb->queue_mapping);
1242         struct hns3_enet_ring *ring = ring_data->ring;
1243         struct netdev_queue *dev_queue;
1244         struct skb_frag_struct *frag;
1245         int next_to_use_head;
1246         int next_to_use_frag;
1247         int buf_num;
1248         int seg_num;
1249         int size;
1250         int ret;
1251         int i;
1252
1253         /* Prefetch the data used later */
1254         prefetch(skb->data);
1255
1256         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
1257         case -EBUSY:
1258                 u64_stats_update_begin(&ring->syncp);
1259                 ring->stats.tx_busy++;
1260                 u64_stats_update_end(&ring->syncp);
1261
1262                 goto out_net_tx_busy;
1263         case -ENOMEM:
1264                 u64_stats_update_begin(&ring->syncp);
1265                 ring->stats.sw_err_cnt++;
1266                 u64_stats_update_end(&ring->syncp);
1267                 netdev_err(netdev, "no memory to xmit!\n");
1268
1269                 goto out_err_tx_ok;
1270         default:
1271                 break;
1272         }
1273
1274         /* No. of segments (plus a header) */
1275         seg_num = skb_shinfo(skb)->nr_frags + 1;
1276         /* Fill the first part */
1277         size = skb_headlen(skb);
1278
1279         next_to_use_head = ring->next_to_use;
1280
1281         ret = priv->ops.fill_desc(ring, skb, size, seg_num == 1 ? 1 : 0,
1282                                   DESC_TYPE_SKB);
1283         if (ret)
1284                 goto head_fill_err;
1285
1286         next_to_use_frag = ring->next_to_use;
1287         /* Fill the fragments */
1288         for (i = 1; i < seg_num; i++) {
1289                 frag = &skb_shinfo(skb)->frags[i - 1];
1290                 size = skb_frag_size(frag);
1291
1292                 ret = priv->ops.fill_desc(ring, frag, size,
1293                                           seg_num - 1 == i ? 1 : 0,
1294                                           DESC_TYPE_PAGE);
1295
1296                 if (ret)
1297                         goto frag_fill_err;
1298         }
1299
1300         /* Complete translate all packets */
1301         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1302         netdev_tx_sent_queue(dev_queue, skb->len);
1303
1304         wmb(); /* Commit all data before submit */
1305
1306         hnae3_queue_xmit(ring->tqp, buf_num);
1307
1308         return NETDEV_TX_OK;
1309
1310 frag_fill_err:
1311         hns3_clear_desc(ring, next_to_use_frag);
1312
1313 head_fill_err:
1314         hns3_clear_desc(ring, next_to_use_head);
1315
1316 out_err_tx_ok:
1317         dev_kfree_skb_any(skb);
1318         return NETDEV_TX_OK;
1319
1320 out_net_tx_busy:
1321         netif_stop_subqueue(netdev, ring_data->queue_index);
1322         smp_mb(); /* Commit all data before submit */
1323
1324         return NETDEV_TX_BUSY;
1325 }
1326
1327 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1328 {
1329         struct hnae3_handle *h = hns3_get_handle(netdev);
1330         struct sockaddr *mac_addr = p;
1331         int ret;
1332
1333         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1334                 return -EADDRNOTAVAIL;
1335
1336         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1337                 netdev_info(netdev, "already using mac address %pM\n",
1338                             mac_addr->sa_data);
1339                 return 0;
1340         }
1341
1342         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1343         if (ret) {
1344                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1345                 return ret;
1346         }
1347
1348         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1349
1350         return 0;
1351 }
1352
1353 static int hns3_nic_do_ioctl(struct net_device *netdev,
1354                              struct ifreq *ifr, int cmd)
1355 {
1356         struct hnae3_handle *h = hns3_get_handle(netdev);
1357
1358         if (!netif_running(netdev))
1359                 return -EINVAL;
1360
1361         if (!h->ae_algo->ops->do_ioctl)
1362                 return -EOPNOTSUPP;
1363
1364         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1365 }
1366
1367 static int hns3_nic_set_features(struct net_device *netdev,
1368                                  netdev_features_t features)
1369 {
1370         netdev_features_t changed = netdev->features ^ features;
1371         struct hns3_nic_priv *priv = netdev_priv(netdev);
1372         struct hnae3_handle *h = priv->ae_handle;
1373         int ret;
1374
1375         if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1376                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1377                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
1378                 else
1379                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
1380         }
1381
1382         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1383                 if (features & NETIF_F_GRO_HW)
1384                         ret = h->ae_algo->ops->set_gro_en(h, true);
1385                 else
1386                         ret = h->ae_algo->ops->set_gro_en(h, false);
1387                 if (ret)
1388                         return ret;
1389         }
1390
1391         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1392             h->ae_algo->ops->enable_vlan_filter) {
1393                 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1394                         h->ae_algo->ops->enable_vlan_filter(h, true);
1395                 else
1396                         h->ae_algo->ops->enable_vlan_filter(h, false);
1397         }
1398
1399         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1400             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1401                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1402                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, true);
1403                 else
1404                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, false);
1405
1406                 if (ret)
1407                         return ret;
1408         }
1409
1410         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1411                 if (features & NETIF_F_NTUPLE)
1412                         h->ae_algo->ops->enable_fd(h, true);
1413                 else
1414                         h->ae_algo->ops->enable_fd(h, false);
1415         }
1416
1417         netdev->features = features;
1418         return 0;
1419 }
1420
1421 static void hns3_nic_get_stats64(struct net_device *netdev,
1422                                  struct rtnl_link_stats64 *stats)
1423 {
1424         struct hns3_nic_priv *priv = netdev_priv(netdev);
1425         int queue_num = priv->ae_handle->kinfo.num_tqps;
1426         struct hnae3_handle *handle = priv->ae_handle;
1427         struct hns3_enet_ring *ring;
1428         u64 rx_length_errors = 0;
1429         u64 rx_crc_errors = 0;
1430         u64 rx_multicast = 0;
1431         unsigned int start;
1432         u64 tx_errors = 0;
1433         u64 rx_errors = 0;
1434         unsigned int idx;
1435         u64 tx_bytes = 0;
1436         u64 rx_bytes = 0;
1437         u64 tx_pkts = 0;
1438         u64 rx_pkts = 0;
1439         u64 tx_drop = 0;
1440         u64 rx_drop = 0;
1441
1442         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1443                 return;
1444
1445         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1446
1447         for (idx = 0; idx < queue_num; idx++) {
1448                 /* fetch the tx stats */
1449                 ring = priv->ring_data[idx].ring;
1450                 do {
1451                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1452                         tx_bytes += ring->stats.tx_bytes;
1453                         tx_pkts += ring->stats.tx_pkts;
1454                         tx_drop += ring->stats.sw_err_cnt;
1455                         tx_errors += ring->stats.sw_err_cnt;
1456                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1457
1458                 /* fetch the rx stats */
1459                 ring = priv->ring_data[idx + queue_num].ring;
1460                 do {
1461                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1462                         rx_bytes += ring->stats.rx_bytes;
1463                         rx_pkts += ring->stats.rx_pkts;
1464                         rx_drop += ring->stats.non_vld_descs;
1465                         rx_drop += ring->stats.l2_err;
1466                         rx_errors += ring->stats.non_vld_descs;
1467                         rx_errors += ring->stats.l2_err;
1468                         rx_crc_errors += ring->stats.l2_err;
1469                         rx_crc_errors += ring->stats.l3l4_csum_err;
1470                         rx_multicast += ring->stats.rx_multicast;
1471                         rx_length_errors += ring->stats.err_pkt_len;
1472                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1473         }
1474
1475         stats->tx_bytes = tx_bytes;
1476         stats->tx_packets = tx_pkts;
1477         stats->rx_bytes = rx_bytes;
1478         stats->rx_packets = rx_pkts;
1479
1480         stats->rx_errors = rx_errors;
1481         stats->multicast = rx_multicast;
1482         stats->rx_length_errors = rx_length_errors;
1483         stats->rx_crc_errors = rx_crc_errors;
1484         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1485
1486         stats->tx_errors = tx_errors;
1487         stats->rx_dropped = rx_drop;
1488         stats->tx_dropped = tx_drop;
1489         stats->collisions = netdev->stats.collisions;
1490         stats->rx_over_errors = netdev->stats.rx_over_errors;
1491         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1492         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1493         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1494         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1495         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1496         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1497         stats->tx_window_errors = netdev->stats.tx_window_errors;
1498         stats->rx_compressed = netdev->stats.rx_compressed;
1499         stats->tx_compressed = netdev->stats.tx_compressed;
1500 }
1501
1502 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1503 {
1504         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1505         struct hnae3_handle *h = hns3_get_handle(netdev);
1506         struct hnae3_knic_private_info *kinfo = &h->kinfo;
1507         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1508         u8 tc = mqprio_qopt->qopt.num_tc;
1509         u16 mode = mqprio_qopt->mode;
1510         u8 hw = mqprio_qopt->qopt.hw;
1511
1512         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1513                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1514                 return -EOPNOTSUPP;
1515
1516         if (tc > HNAE3_MAX_TC)
1517                 return -EINVAL;
1518
1519         if (!netdev)
1520                 return -EINVAL;
1521
1522         return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1523                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1524 }
1525
1526 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1527                              void *type_data)
1528 {
1529         if (type != TC_SETUP_QDISC_MQPRIO)
1530                 return -EOPNOTSUPP;
1531
1532         return hns3_setup_tc(dev, type_data);
1533 }
1534
1535 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1536                                 __be16 proto, u16 vid)
1537 {
1538         struct hnae3_handle *h = hns3_get_handle(netdev);
1539         struct hns3_nic_priv *priv = netdev_priv(netdev);
1540         int ret = -EIO;
1541
1542         if (h->ae_algo->ops->set_vlan_filter)
1543                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1544
1545         if (!ret)
1546                 set_bit(vid, priv->active_vlans);
1547
1548         return ret;
1549 }
1550
1551 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1552                                  __be16 proto, u16 vid)
1553 {
1554         struct hnae3_handle *h = hns3_get_handle(netdev);
1555         struct hns3_nic_priv *priv = netdev_priv(netdev);
1556         int ret = -EIO;
1557
1558         if (h->ae_algo->ops->set_vlan_filter)
1559                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1560
1561         if (!ret)
1562                 clear_bit(vid, priv->active_vlans);
1563
1564         return ret;
1565 }
1566
1567 static int hns3_restore_vlan(struct net_device *netdev)
1568 {
1569         struct hns3_nic_priv *priv = netdev_priv(netdev);
1570         int ret = 0;
1571         u16 vid;
1572
1573         for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
1574                 ret = hns3_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
1575                 if (ret) {
1576                         netdev_err(netdev, "Restore vlan: %d filter, ret:%d\n",
1577                                    vid, ret);
1578                         return ret;
1579                 }
1580         }
1581
1582         return ret;
1583 }
1584
1585 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1586                                 u8 qos, __be16 vlan_proto)
1587 {
1588         struct hnae3_handle *h = hns3_get_handle(netdev);
1589         int ret = -EIO;
1590
1591         if (h->ae_algo->ops->set_vf_vlan_filter)
1592                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1593                                                    qos, vlan_proto);
1594
1595         return ret;
1596 }
1597
1598 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1599 {
1600         struct hnae3_handle *h = hns3_get_handle(netdev);
1601         int ret;
1602
1603         if (!h->ae_algo->ops->set_mtu)
1604                 return -EOPNOTSUPP;
1605
1606         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1607         if (ret)
1608                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1609                            ret);
1610         else
1611                 netdev->mtu = new_mtu;
1612
1613         return ret;
1614 }
1615
1616 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1617 {
1618         struct hns3_nic_priv *priv = netdev_priv(ndev);
1619         struct hns3_enet_ring *tx_ring = NULL;
1620         int timeout_queue = 0;
1621         int hw_head, hw_tail;
1622         int i;
1623
1624         /* Find the stopped queue the same way the stack does */
1625         for (i = 0; i < ndev->real_num_tx_queues; i++) {
1626                 struct netdev_queue *q;
1627                 unsigned long trans_start;
1628
1629                 q = netdev_get_tx_queue(ndev, i);
1630                 trans_start = q->trans_start;
1631                 if (netif_xmit_stopped(q) &&
1632                     time_after(jiffies,
1633                                (trans_start + ndev->watchdog_timeo))) {
1634                         timeout_queue = i;
1635                         break;
1636                 }
1637         }
1638
1639         if (i == ndev->num_tx_queues) {
1640                 netdev_info(ndev,
1641                             "no netdev TX timeout queue found, timeout count: %llu\n",
1642                             priv->tx_timeout_count);
1643                 return false;
1644         }
1645
1646         tx_ring = priv->ring_data[timeout_queue].ring;
1647
1648         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1649                                 HNS3_RING_TX_RING_HEAD_REG);
1650         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1651                                 HNS3_RING_TX_RING_TAIL_REG);
1652         netdev_info(ndev,
1653                     "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",
1654                     priv->tx_timeout_count,
1655                     timeout_queue,
1656                     tx_ring->next_to_use,
1657                     tx_ring->next_to_clean,
1658                     hw_head,
1659                     hw_tail,
1660                     readl(tx_ring->tqp_vector->mask_addr));
1661
1662         return true;
1663 }
1664
1665 static void hns3_nic_net_timeout(struct net_device *ndev)
1666 {
1667         struct hns3_nic_priv *priv = netdev_priv(ndev);
1668         struct hnae3_handle *h = priv->ae_handle;
1669
1670         if (!hns3_get_tx_timeo_queue_info(ndev))
1671                 return;
1672
1673         priv->tx_timeout_count++;
1674
1675         /* request the reset, and let the hclge to determine
1676          * which reset level should be done
1677          */
1678         if (h->ae_algo->ops->reset_event)
1679                 h->ae_algo->ops->reset_event(h->pdev, h);
1680 }
1681
1682 static const struct net_device_ops hns3_nic_netdev_ops = {
1683         .ndo_open               = hns3_nic_net_open,
1684         .ndo_stop               = hns3_nic_net_stop,
1685         .ndo_start_xmit         = hns3_nic_net_xmit,
1686         .ndo_tx_timeout         = hns3_nic_net_timeout,
1687         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1688         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1689         .ndo_change_mtu         = hns3_nic_change_mtu,
1690         .ndo_set_features       = hns3_nic_set_features,
1691         .ndo_get_stats64        = hns3_nic_get_stats64,
1692         .ndo_setup_tc           = hns3_nic_setup_tc,
1693         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1694         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1695         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1696         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1697 };
1698
1699 static bool hns3_is_phys_func(struct pci_dev *pdev)
1700 {
1701         u32 dev_id = pdev->device;
1702
1703         switch (dev_id) {
1704         case HNAE3_DEV_ID_GE:
1705         case HNAE3_DEV_ID_25GE:
1706         case HNAE3_DEV_ID_25GE_RDMA:
1707         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1708         case HNAE3_DEV_ID_50GE_RDMA:
1709         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1710         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1711                 return true;
1712         case HNAE3_DEV_ID_100G_VF:
1713         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
1714                 return false;
1715         default:
1716                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
1717                          dev_id);
1718         }
1719
1720         return false;
1721 }
1722
1723 static void hns3_disable_sriov(struct pci_dev *pdev)
1724 {
1725         /* If our VFs are assigned we cannot shut down SR-IOV
1726          * without causing issues, so just leave the hardware
1727          * available but disabled
1728          */
1729         if (pci_vfs_assigned(pdev)) {
1730                 dev_warn(&pdev->dev,
1731                          "disabling driver while VFs are assigned\n");
1732                 return;
1733         }
1734
1735         pci_disable_sriov(pdev);
1736 }
1737
1738 static void hns3_get_dev_capability(struct pci_dev *pdev,
1739                                     struct hnae3_ae_dev *ae_dev)
1740 {
1741         if (pdev->revision >= 0x21) {
1742                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
1743                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
1744         }
1745 }
1746
1747 /* hns3_probe - Device initialization routine
1748  * @pdev: PCI device information struct
1749  * @ent: entry in hns3_pci_tbl
1750  *
1751  * hns3_probe initializes a PF identified by a pci_dev structure.
1752  * The OS initialization, configuring of the PF private structure,
1753  * and a hardware reset occur.
1754  *
1755  * Returns 0 on success, negative on failure
1756  */
1757 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1758 {
1759         struct hnae3_ae_dev *ae_dev;
1760         int ret;
1761
1762         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
1763                               GFP_KERNEL);
1764         if (!ae_dev) {
1765                 ret = -ENOMEM;
1766                 return ret;
1767         }
1768
1769         ae_dev->pdev = pdev;
1770         ae_dev->flag = ent->driver_data;
1771         ae_dev->dev_type = HNAE3_DEV_KNIC;
1772         ae_dev->reset_type = HNAE3_NONE_RESET;
1773         hns3_get_dev_capability(pdev, ae_dev);
1774         pci_set_drvdata(pdev, ae_dev);
1775
1776         hnae3_register_ae_dev(ae_dev);
1777
1778         return 0;
1779 }
1780
1781 /* hns3_remove - Device removal routine
1782  * @pdev: PCI device information struct
1783  */
1784 static void hns3_remove(struct pci_dev *pdev)
1785 {
1786         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1787
1788         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
1789                 hns3_disable_sriov(pdev);
1790
1791         hnae3_unregister_ae_dev(ae_dev);
1792         pci_set_drvdata(pdev, NULL);
1793 }
1794
1795 /**
1796  * hns3_pci_sriov_configure
1797  * @pdev: pointer to a pci_dev structure
1798  * @num_vfs: number of VFs to allocate
1799  *
1800  * Enable or change the number of VFs. Called when the user updates the number
1801  * of VFs in sysfs.
1802  **/
1803 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
1804 {
1805         int ret;
1806
1807         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
1808                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
1809                 return -EINVAL;
1810         }
1811
1812         if (num_vfs) {
1813                 ret = pci_enable_sriov(pdev, num_vfs);
1814                 if (ret)
1815                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
1816                 else
1817                         return num_vfs;
1818         } else if (!pci_vfs_assigned(pdev)) {
1819                 pci_disable_sriov(pdev);
1820         } else {
1821                 dev_warn(&pdev->dev,
1822                          "Unable to free VFs because some are assigned to VMs.\n");
1823         }
1824
1825         return 0;
1826 }
1827
1828 static void hns3_shutdown(struct pci_dev *pdev)
1829 {
1830         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1831
1832         hnae3_unregister_ae_dev(ae_dev);
1833         devm_kfree(&pdev->dev, ae_dev);
1834         pci_set_drvdata(pdev, NULL);
1835
1836         if (system_state == SYSTEM_POWER_OFF)
1837                 pci_set_power_state(pdev, PCI_D3hot);
1838 }
1839
1840 static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
1841                                             pci_channel_state_t state)
1842 {
1843         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1844         pci_ers_result_t ret;
1845
1846         dev_info(&pdev->dev, "PCI error detected, state(=%d)!!\n", state);
1847
1848         if (state == pci_channel_io_perm_failure)
1849                 return PCI_ERS_RESULT_DISCONNECT;
1850
1851         if (!ae_dev) {
1852                 dev_err(&pdev->dev,
1853                         "Can't recover - error happened during device init\n");
1854                 return PCI_ERS_RESULT_NONE;
1855         }
1856
1857         if (ae_dev->ops->handle_hw_ras_error)
1858                 ret = ae_dev->ops->handle_hw_ras_error(ae_dev);
1859         else
1860                 return PCI_ERS_RESULT_NONE;
1861
1862         return ret;
1863 }
1864
1865 static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
1866 {
1867         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1868         struct device *dev = &pdev->dev;
1869
1870         dev_info(dev, "requesting reset due to PCI error\n");
1871
1872         /* request the reset */
1873         if (ae_dev->ops->reset_event) {
1874                 ae_dev->ops->reset_event(pdev, NULL);
1875                 return PCI_ERS_RESULT_RECOVERED;
1876         }
1877
1878         return PCI_ERS_RESULT_DISCONNECT;
1879 }
1880
1881 static void hns3_reset_prepare(struct pci_dev *pdev)
1882 {
1883         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1884
1885         dev_info(&pdev->dev, "hns3 flr prepare\n");
1886         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_prepare)
1887                 ae_dev->ops->flr_prepare(ae_dev);
1888 }
1889
1890 static void hns3_reset_done(struct pci_dev *pdev)
1891 {
1892         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1893
1894         dev_info(&pdev->dev, "hns3 flr done\n");
1895         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_done)
1896                 ae_dev->ops->flr_done(ae_dev);
1897 }
1898
1899 static const struct pci_error_handlers hns3_err_handler = {
1900         .error_detected = hns3_error_detected,
1901         .slot_reset     = hns3_slot_reset,
1902         .reset_prepare  = hns3_reset_prepare,
1903         .reset_done     = hns3_reset_done,
1904 };
1905
1906 static struct pci_driver hns3_driver = {
1907         .name     = hns3_driver_name,
1908         .id_table = hns3_pci_tbl,
1909         .probe    = hns3_probe,
1910         .remove   = hns3_remove,
1911         .shutdown = hns3_shutdown,
1912         .sriov_configure = hns3_pci_sriov_configure,
1913         .err_handler    = &hns3_err_handler,
1914 };
1915
1916 /* set default feature to hns3 */
1917 static void hns3_set_default_feature(struct net_device *netdev)
1918 {
1919         struct hnae3_handle *h = hns3_get_handle(netdev);
1920         struct pci_dev *pdev = h->pdev;
1921
1922         netdev->priv_flags |= IFF_UNICAST_FLT;
1923
1924         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1925                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1926                 NETIF_F_GRO | 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_enc_features |= NETIF_F_TSO_MANGLEID;
1931
1932         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
1933
1934         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1935                 NETIF_F_HW_VLAN_CTAG_FILTER |
1936                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1937                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1938                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1939                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1940                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1941
1942         netdev->vlan_features |=
1943                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
1944                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
1945                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1946                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1947                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1948
1949         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1950                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1951                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1952                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1953                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1954                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1955
1956         if (pdev->revision >= 0x21) {
1957                 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1958                         NETIF_F_GRO_HW;
1959                 netdev->features |= NETIF_F_GRO_HW;
1960
1961                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
1962                         netdev->hw_features |= NETIF_F_NTUPLE;
1963                         netdev->features |= NETIF_F_NTUPLE;
1964                 }
1965         }
1966 }
1967
1968 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
1969                              struct hns3_desc_cb *cb)
1970 {
1971         unsigned int order = hnae3_page_order(ring);
1972         struct page *p;
1973
1974         p = dev_alloc_pages(order);
1975         if (!p)
1976                 return -ENOMEM;
1977
1978         cb->priv = p;
1979         cb->page_offset = 0;
1980         cb->reuse_flag = 0;
1981         cb->buf  = page_address(p);
1982         cb->length = hnae3_page_size(ring);
1983         cb->type = DESC_TYPE_PAGE;
1984
1985         return 0;
1986 }
1987
1988 static void hns3_free_buffer(struct hns3_enet_ring *ring,
1989                              struct hns3_desc_cb *cb)
1990 {
1991         if (cb->type == DESC_TYPE_SKB)
1992                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
1993         else if (!HNAE3_IS_TX_RING(ring))
1994                 put_page((struct page *)cb->priv);
1995         memset(cb, 0, sizeof(*cb));
1996 }
1997
1998 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
1999 {
2000         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
2001                                cb->length, ring_to_dma_dir(ring));
2002
2003         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
2004                 return -EIO;
2005
2006         return 0;
2007 }
2008
2009 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
2010                               struct hns3_desc_cb *cb)
2011 {
2012         if (cb->type == DESC_TYPE_SKB)
2013                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
2014                                  ring_to_dma_dir(ring));
2015         else if (cb->length)
2016                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
2017                                ring_to_dma_dir(ring));
2018 }
2019
2020 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2021 {
2022         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2023         ring->desc[i].addr = 0;
2024 }
2025
2026 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2027 {
2028         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2029
2030         if (!ring->desc_cb[i].dma)
2031                 return;
2032
2033         hns3_buffer_detach(ring, i);
2034         hns3_free_buffer(ring, cb);
2035 }
2036
2037 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2038 {
2039         int i;
2040
2041         for (i = 0; i < ring->desc_num; i++)
2042                 hns3_free_buffer_detach(ring, i);
2043 }
2044
2045 /* free desc along with its attached buffer */
2046 static void hns3_free_desc(struct hns3_enet_ring *ring)
2047 {
2048         int size = ring->desc_num * sizeof(ring->desc[0]);
2049
2050         hns3_free_buffers(ring);
2051
2052         if (ring->desc) {
2053                 dma_free_coherent(ring_to_dev(ring), size,
2054                                   ring->desc, ring->desc_dma_addr);
2055                 ring->desc = NULL;
2056         }
2057 }
2058
2059 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2060 {
2061         int size = ring->desc_num * sizeof(ring->desc[0]);
2062
2063         ring->desc = dma_alloc_coherent(ring_to_dev(ring), size,
2064                                         &ring->desc_dma_addr, GFP_KERNEL);
2065         if (!ring->desc)
2066                 return -ENOMEM;
2067
2068         return 0;
2069 }
2070
2071 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2072                                    struct hns3_desc_cb *cb)
2073 {
2074         int ret;
2075
2076         ret = hns3_alloc_buffer(ring, cb);
2077         if (ret)
2078                 goto out;
2079
2080         ret = hns3_map_buffer(ring, cb);
2081         if (ret)
2082                 goto out_with_buf;
2083
2084         return 0;
2085
2086 out_with_buf:
2087         hns3_free_buffer(ring, cb);
2088 out:
2089         return ret;
2090 }
2091
2092 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2093 {
2094         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2095
2096         if (ret)
2097                 return ret;
2098
2099         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2100
2101         return 0;
2102 }
2103
2104 /* Allocate memory for raw pkg, and map with dma */
2105 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2106 {
2107         int i, j, ret;
2108
2109         for (i = 0; i < ring->desc_num; i++) {
2110                 ret = hns3_alloc_buffer_attach(ring, i);
2111                 if (ret)
2112                         goto out_buffer_fail;
2113         }
2114
2115         return 0;
2116
2117 out_buffer_fail:
2118         for (j = i - 1; j >= 0; j--)
2119                 hns3_free_buffer_detach(ring, j);
2120         return ret;
2121 }
2122
2123 /* detach a in-used buffer and replace with a reserved one  */
2124 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2125                                 struct hns3_desc_cb *res_cb)
2126 {
2127         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2128         ring->desc_cb[i] = *res_cb;
2129         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2130         ring->desc[i].rx.bd_base_info = 0;
2131 }
2132
2133 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2134 {
2135         ring->desc_cb[i].reuse_flag = 0;
2136         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
2137                 + ring->desc_cb[i].page_offset);
2138         ring->desc[i].rx.bd_base_info = 0;
2139 }
2140
2141 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
2142                                       int *pkts)
2143 {
2144         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2145
2146         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2147         (*bytes) += desc_cb->length;
2148         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
2149         hns3_free_buffer_detach(ring, ring->next_to_clean);
2150
2151         ring_ptr_move_fw(ring, next_to_clean);
2152 }
2153
2154 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2155 {
2156         int u = ring->next_to_use;
2157         int c = ring->next_to_clean;
2158
2159         if (unlikely(h > ring->desc_num))
2160                 return 0;
2161
2162         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2163 }
2164
2165 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2166 {
2167         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2168         struct hns3_nic_priv *priv = netdev_priv(netdev);
2169         struct netdev_queue *dev_queue;
2170         int bytes, pkts;
2171         int head;
2172
2173         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2174         rmb(); /* Make sure head is ready before touch any data */
2175
2176         if (is_ring_empty(ring) || head == ring->next_to_clean)
2177                 return; /* no data to poll */
2178
2179         if (unlikely(!is_valid_clean_head(ring, head))) {
2180                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2181                            ring->next_to_use, ring->next_to_clean);
2182
2183                 u64_stats_update_begin(&ring->syncp);
2184                 ring->stats.io_err_cnt++;
2185                 u64_stats_update_end(&ring->syncp);
2186                 return;
2187         }
2188
2189         bytes = 0;
2190         pkts = 0;
2191         while (head != ring->next_to_clean) {
2192                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2193                 /* Issue prefetch for next Tx descriptor */
2194                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2195         }
2196
2197         ring->tqp_vector->tx_group.total_bytes += bytes;
2198         ring->tqp_vector->tx_group.total_packets += pkts;
2199
2200         u64_stats_update_begin(&ring->syncp);
2201         ring->stats.tx_bytes += bytes;
2202         ring->stats.tx_pkts += pkts;
2203         u64_stats_update_end(&ring->syncp);
2204
2205         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2206         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2207
2208         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2209                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2210                 /* Make sure that anybody stopping the queue after this
2211                  * sees the new next_to_clean.
2212                  */
2213                 smp_mb();
2214                 if (netif_tx_queue_stopped(dev_queue) &&
2215                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2216                         netif_tx_wake_queue(dev_queue);
2217                         ring->stats.restart_queue++;
2218                 }
2219         }
2220 }
2221
2222 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2223 {
2224         int ntc = ring->next_to_clean;
2225         int ntu = ring->next_to_use;
2226
2227         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2228 }
2229
2230 static void
2231 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2232 {
2233         struct hns3_desc_cb *desc_cb;
2234         struct hns3_desc_cb res_cbs;
2235         int i, ret;
2236
2237         for (i = 0; i < cleand_count; i++) {
2238                 desc_cb = &ring->desc_cb[ring->next_to_use];
2239                 if (desc_cb->reuse_flag) {
2240                         u64_stats_update_begin(&ring->syncp);
2241                         ring->stats.reuse_pg_cnt++;
2242                         u64_stats_update_end(&ring->syncp);
2243
2244                         hns3_reuse_buffer(ring, ring->next_to_use);
2245                 } else {
2246                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2247                         if (ret) {
2248                                 u64_stats_update_begin(&ring->syncp);
2249                                 ring->stats.sw_err_cnt++;
2250                                 u64_stats_update_end(&ring->syncp);
2251
2252                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2253                                            "hnae reserve buffer map failed.\n");
2254                                 break;
2255                         }
2256                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2257                 }
2258
2259                 ring_ptr_move_fw(ring, next_to_use);
2260         }
2261
2262         wmb(); /* Make all data has been write before submit */
2263         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2264 }
2265
2266 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2267                                 struct hns3_enet_ring *ring, int pull_len,
2268                                 struct hns3_desc_cb *desc_cb)
2269 {
2270         struct hns3_desc *desc;
2271         u32 truesize;
2272         int size;
2273         int last_offset;
2274         bool twobufs;
2275
2276         twobufs = ((PAGE_SIZE < 8192) &&
2277                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2278
2279         desc = &ring->desc[ring->next_to_clean];
2280         size = le16_to_cpu(desc->rx.size);
2281
2282         truesize = hnae3_buf_size(ring);
2283
2284         if (!twobufs)
2285                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2286
2287         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2288                         size - pull_len, truesize);
2289
2290          /* Avoid re-using remote pages,flag default unreuse */
2291         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2292                 return;
2293
2294         if (twobufs) {
2295                 /* If we are only owner of page we can reuse it */
2296                 if (likely(page_count(desc_cb->priv) == 1)) {
2297                         /* Flip page offset to other buffer */
2298                         desc_cb->page_offset ^= truesize;
2299
2300                         desc_cb->reuse_flag = 1;
2301                         /* bump ref count on page before it is given*/
2302                         get_page(desc_cb->priv);
2303                 }
2304                 return;
2305         }
2306
2307         /* Move offset up to the next cache line */
2308         desc_cb->page_offset += truesize;
2309
2310         if (desc_cb->page_offset <= last_offset) {
2311                 desc_cb->reuse_flag = 1;
2312                 /* Bump ref count on page before it is given*/
2313                 get_page(desc_cb->priv);
2314         }
2315 }
2316
2317 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2318                              struct hns3_desc *desc)
2319 {
2320         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2321         int l3_type, l4_type;
2322         u32 bd_base_info;
2323         int ol4_type;
2324         u32 l234info;
2325
2326         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2327         l234info = le32_to_cpu(desc->rx.l234_info);
2328
2329         skb->ip_summed = CHECKSUM_NONE;
2330
2331         skb_checksum_none_assert(skb);
2332
2333         if (!(netdev->features & NETIF_F_RXCSUM))
2334                 return;
2335
2336         /* We MUST enable hardware checksum before enabling hardware GRO */
2337         if (skb_shinfo(skb)->gso_size) {
2338                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2339                 return;
2340         }
2341
2342         /* check if hardware has done checksum */
2343         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2344                 return;
2345
2346         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2347                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2348                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2349                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2350                 u64_stats_update_begin(&ring->syncp);
2351                 ring->stats.l3l4_csum_err++;
2352                 u64_stats_update_end(&ring->syncp);
2353
2354                 return;
2355         }
2356
2357         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2358                                   HNS3_RXD_L3ID_S);
2359         l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2360                                   HNS3_RXD_L4ID_S);
2361
2362         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2363                                    HNS3_RXD_OL4ID_S);
2364         switch (ol4_type) {
2365         case HNS3_OL4_TYPE_MAC_IN_UDP:
2366         case HNS3_OL4_TYPE_NVGRE:
2367                 skb->csum_level = 1;
2368                 /* fall through */
2369         case HNS3_OL4_TYPE_NO_TUN:
2370                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2371                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2372                      l3_type == HNS3_L3_TYPE_IPV6) &&
2373                     (l4_type == HNS3_L4_TYPE_UDP ||
2374                      l4_type == HNS3_L4_TYPE_TCP ||
2375                      l4_type == HNS3_L4_TYPE_SCTP))
2376                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2377                 break;
2378         default:
2379                 break;
2380         }
2381 }
2382
2383 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2384 {
2385         if (skb_has_frag_list(skb))
2386                 napi_gro_flush(&ring->tqp_vector->napi, false);
2387
2388         napi_gro_receive(&ring->tqp_vector->napi, skb);
2389 }
2390
2391 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2392                                 struct hns3_desc *desc, u32 l234info,
2393                                 u16 *vlan_tag)
2394 {
2395         struct pci_dev *pdev = ring->tqp->handle->pdev;
2396
2397         if (pdev->revision == 0x20) {
2398                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2399                 if (!(*vlan_tag & VLAN_VID_MASK))
2400                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2401
2402                 return (*vlan_tag != 0);
2403         }
2404
2405 #define HNS3_STRP_OUTER_VLAN    0x1
2406 #define HNS3_STRP_INNER_VLAN    0x2
2407
2408         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2409                                 HNS3_RXD_STRP_TAGP_S)) {
2410         case HNS3_STRP_OUTER_VLAN:
2411                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2412                 return true;
2413         case HNS3_STRP_INNER_VLAN:
2414                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2415                 return true;
2416         default:
2417                 return false;
2418         }
2419 }
2420
2421 static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
2422                           unsigned char *va)
2423 {
2424 #define HNS3_NEED_ADD_FRAG      1
2425         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2426         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2427         struct sk_buff *skb;
2428
2429         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2430         skb = ring->skb;
2431         if (unlikely(!skb)) {
2432                 netdev_err(netdev, "alloc rx skb fail\n");
2433
2434                 u64_stats_update_begin(&ring->syncp);
2435                 ring->stats.sw_err_cnt++;
2436                 u64_stats_update_end(&ring->syncp);
2437
2438                 return -ENOMEM;
2439         }
2440
2441         prefetchw(skb->data);
2442
2443         ring->pending_buf = 1;
2444         ring->frag_num = 0;
2445         ring->tail_skb = NULL;
2446         if (length <= HNS3_RX_HEAD_SIZE) {
2447                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2448
2449                 /* We can reuse buffer as-is, just make sure it is local */
2450                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2451                         desc_cb->reuse_flag = 1;
2452                 else /* This page cannot be reused so discard it */
2453                         put_page(desc_cb->priv);
2454
2455                 ring_ptr_move_fw(ring, next_to_clean);
2456                 return 0;
2457         }
2458         u64_stats_update_begin(&ring->syncp);
2459         ring->stats.seg_pkt_cnt++;
2460         u64_stats_update_end(&ring->syncp);
2461
2462         ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2463         __skb_put(skb, ring->pull_len);
2464         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2465                             desc_cb);
2466         ring_ptr_move_fw(ring, next_to_clean);
2467
2468         return HNS3_NEED_ADD_FRAG;
2469 }
2470
2471 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2472                          struct sk_buff **out_skb, bool pending)
2473 {
2474         struct sk_buff *skb = *out_skb;
2475         struct sk_buff *head_skb = *out_skb;
2476         struct sk_buff *new_skb;
2477         struct hns3_desc_cb *desc_cb;
2478         struct hns3_desc *pre_desc;
2479         u32 bd_base_info;
2480         int pre_bd;
2481
2482         /* if there is pending bd, the SW param next_to_clean has moved
2483          * to next and the next is NULL
2484          */
2485         if (pending) {
2486                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2487                         ring->desc_num;
2488                 pre_desc = &ring->desc[pre_bd];
2489                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2490         } else {
2491                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2492         }
2493
2494         while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2495                 desc = &ring->desc[ring->next_to_clean];
2496                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2497                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2498                 if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
2499                         return -ENXIO;
2500
2501                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2502                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2503                                                  HNS3_RX_HEAD_SIZE);
2504                         if (unlikely(!new_skb)) {
2505                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2506                                            "alloc rx skb frag fail\n");
2507                                 return -ENXIO;
2508                         }
2509                         ring->frag_num = 0;
2510
2511                         if (ring->tail_skb) {
2512                                 ring->tail_skb->next = new_skb;
2513                                 ring->tail_skb = new_skb;
2514                         } else {
2515                                 skb_shinfo(skb)->frag_list = new_skb;
2516                                 ring->tail_skb = new_skb;
2517                         }
2518                 }
2519
2520                 if (ring->tail_skb) {
2521                         head_skb->truesize += hnae3_buf_size(ring);
2522                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2523                         head_skb->len += le16_to_cpu(desc->rx.size);
2524                         skb = ring->tail_skb;
2525                 }
2526
2527                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2528                 ring_ptr_move_fw(ring, next_to_clean);
2529                 ring->pending_buf++;
2530         }
2531
2532         return 0;
2533 }
2534
2535 static void hns3_set_gro_param(struct sk_buff *skb, u32 l234info,
2536                                u32 bd_base_info)
2537 {
2538         u16 gro_count;
2539         u32 l3_type;
2540
2541         gro_count = hnae3_get_field(l234info, HNS3_RXD_GRO_COUNT_M,
2542                                     HNS3_RXD_GRO_COUNT_S);
2543         /* if there is no HW GRO, do not set gro params */
2544         if (!gro_count)
2545                 return;
2546
2547         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
2548          * to skb_shinfo(skb)->gso_segs
2549          */
2550         NAPI_GRO_CB(skb)->count = gro_count;
2551
2552         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2553                                   HNS3_RXD_L3ID_S);
2554         if (l3_type == HNS3_L3_TYPE_IPV4)
2555                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2556         else if (l3_type == HNS3_L3_TYPE_IPV6)
2557                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2558         else
2559                 return;
2560
2561         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2562                                                     HNS3_RXD_GRO_SIZE_M,
2563                                                     HNS3_RXD_GRO_SIZE_S);
2564         if (skb_shinfo(skb)->gso_size)
2565                 tcp_gro_complete(skb);
2566 }
2567
2568 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2569                                      struct sk_buff *skb)
2570 {
2571         struct hnae3_handle *handle = ring->tqp->handle;
2572         enum pkt_hash_types rss_type;
2573         struct hns3_desc *desc;
2574         int last_bd;
2575
2576         /* When driver handle the rss type, ring->next_to_clean indicates the
2577          * first descriptor of next packet, need -1 here.
2578          */
2579         last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
2580         desc = &ring->desc[last_bd];
2581
2582         if (le32_to_cpu(desc->rx.rss_hash))
2583                 rss_type = handle->kinfo.rss_type;
2584         else
2585                 rss_type = PKT_HASH_TYPE_NONE;
2586
2587         skb_set_hash(skb, le32_to_cpu(desc->rx.rss_hash), rss_type);
2588 }
2589
2590 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2591                              struct sk_buff **out_skb)
2592 {
2593         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2594         enum hns3_pkt_l2t_type l2_frame_type;
2595         struct sk_buff *skb = ring->skb;
2596         struct hns3_desc_cb *desc_cb;
2597         struct hns3_desc *desc;
2598         u32 bd_base_info;
2599         u32 l234info;
2600         int length;
2601         int ret;
2602
2603         desc = &ring->desc[ring->next_to_clean];
2604         desc_cb = &ring->desc_cb[ring->next_to_clean];
2605
2606         prefetch(desc);
2607
2608         length = le16_to_cpu(desc->rx.size);
2609         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2610
2611         /* Check valid BD */
2612         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2613                 return -ENXIO;
2614
2615         if (!skb)
2616                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2617
2618         /* Prefetch first cache line of first page
2619          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2620          * line size is 64B so need to prefetch twice to make it 128B. But in
2621          * actual we can have greater size of caches with 128B Level 1 cache
2622          * lines. In such a case, single fetch would suffice to cache in the
2623          * relevant part of the header.
2624          */
2625         prefetch(ring->va);
2626 #if L1_CACHE_BYTES < 128
2627         prefetch(ring->va + L1_CACHE_BYTES);
2628 #endif
2629
2630         if (!skb) {
2631                 ret = hns3_alloc_skb(ring, length, ring->va);
2632                 *out_skb = skb = ring->skb;
2633
2634                 if (ret < 0) /* alloc buffer fail */
2635                         return ret;
2636                 if (ret > 0) { /* need add frag */
2637                         ret = hns3_add_frag(ring, desc, &skb, false);
2638                         if (ret)
2639                                 return ret;
2640
2641                         /* As the head data may be changed when GRO enable, copy
2642                          * the head data in after other data rx completed
2643                          */
2644                         memcpy(skb->data, ring->va,
2645                                ALIGN(ring->pull_len, sizeof(long)));
2646                 }
2647         } else {
2648                 ret = hns3_add_frag(ring, desc, &skb, true);
2649                 if (ret)
2650                         return ret;
2651
2652                 /* As the head data may be changed when GRO enable, copy
2653                  * the head data in after other data rx completed
2654                  */
2655                 memcpy(skb->data, ring->va,
2656                        ALIGN(ring->pull_len, sizeof(long)));
2657         }
2658
2659         l234info = le32_to_cpu(desc->rx.l234_info);
2660         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2661
2662         /* Based on hw strategy, the tag offloaded will be stored at
2663          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2664          * in one layer tag case.
2665          */
2666         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2667                 u16 vlan_tag;
2668
2669                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2670                         __vlan_hwaccel_put_tag(skb,
2671                                                htons(ETH_P_8021Q),
2672                                                vlan_tag);
2673         }
2674
2675         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2676                 u64_stats_update_begin(&ring->syncp);
2677                 ring->stats.non_vld_descs++;
2678                 u64_stats_update_end(&ring->syncp);
2679
2680                 dev_kfree_skb_any(skb);
2681                 return -EINVAL;
2682         }
2683
2684         if (unlikely((!desc->rx.pkt_len) ||
2685                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2686                 u64_stats_update_begin(&ring->syncp);
2687                 ring->stats.err_pkt_len++;
2688                 u64_stats_update_end(&ring->syncp);
2689
2690                 dev_kfree_skb_any(skb);
2691                 return -EFAULT;
2692         }
2693
2694         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2695                 u64_stats_update_begin(&ring->syncp);
2696                 ring->stats.l2_err++;
2697                 u64_stats_update_end(&ring->syncp);
2698
2699                 dev_kfree_skb_any(skb);
2700                 return -EFAULT;
2701         }
2702
2703         l2_frame_type = hnae3_get_field(l234info, HNS3_RXD_DMAC_M,
2704                                         HNS3_RXD_DMAC_S);
2705         u64_stats_update_begin(&ring->syncp);
2706         if (l2_frame_type == HNS3_L2_TYPE_MULTICAST)
2707                 ring->stats.rx_multicast++;
2708
2709         ring->stats.rx_pkts++;
2710         ring->stats.rx_bytes += skb->len;
2711         u64_stats_update_end(&ring->syncp);
2712
2713         ring->tqp_vector->rx_group.total_bytes += skb->len;
2714
2715         /* This is needed in order to enable forwarding support */
2716         hns3_set_gro_param(skb, l234info, bd_base_info);
2717
2718         hns3_rx_checksum(ring, skb, desc);
2719         *out_skb = skb;
2720         hns3_set_rx_skb_rss_type(ring, skb);
2721
2722         return 0;
2723 }
2724
2725 int hns3_clean_rx_ring(
2726                 struct hns3_enet_ring *ring, int budget,
2727                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2728 {
2729 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2730         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2731         int recv_pkts, recv_bds, clean_count, err;
2732         int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
2733         struct sk_buff *skb = ring->skb;
2734         int num;
2735
2736         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2737         rmb(); /* Make sure num taken effect before the other data is touched */
2738
2739         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2740         num -= unused_count;
2741
2742         while (recv_pkts < budget && recv_bds < num) {
2743                 /* Reuse or realloc buffers */
2744                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2745                         hns3_nic_alloc_rx_buffers(ring,
2746                                                   clean_count + unused_count);
2747                         clean_count = 0;
2748                         unused_count = hns3_desc_unused(ring) -
2749                                         ring->pending_buf;
2750                 }
2751
2752                 /* Poll one pkt */
2753                 err = hns3_handle_rx_bd(ring, &skb);
2754                 if (unlikely(!skb)) /* This fault cannot be repaired */
2755                         goto out;
2756
2757                 if (err == -ENXIO) { /* Do not get FE for the packet */
2758                         goto out;
2759                 } else if (unlikely(err)) {  /* Do jump the err */
2760                         recv_bds += ring->pending_buf;
2761                         clean_count += ring->pending_buf;
2762                         ring->skb = NULL;
2763                         ring->pending_buf = 0;
2764                         continue;
2765                 }
2766
2767                 /* Do update ip stack process */
2768                 skb->protocol = eth_type_trans(skb, netdev);
2769                 rx_fn(ring, skb);
2770                 recv_bds += ring->pending_buf;
2771                 clean_count += ring->pending_buf;
2772                 ring->skb = NULL;
2773                 ring->pending_buf = 0;
2774
2775                 recv_pkts++;
2776         }
2777
2778 out:
2779         /* Make all data has been write before submit */
2780         if (clean_count + unused_count > 0)
2781                 hns3_nic_alloc_rx_buffers(ring,
2782                                           clean_count + unused_count);
2783
2784         return recv_pkts;
2785 }
2786
2787 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2788 {
2789         struct hns3_enet_tqp_vector *tqp_vector =
2790                                         ring_group->ring->tqp_vector;
2791         enum hns3_flow_level_range new_flow_level;
2792         int packets_per_msecs;
2793         int bytes_per_msecs;
2794         u32 time_passed_ms;
2795         u16 new_int_gl;
2796
2797         if (!ring_group->coal.int_gl || !tqp_vector->last_jiffies)
2798                 return false;
2799
2800         if (ring_group->total_packets == 0) {
2801                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2802                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2803                 return true;
2804         }
2805
2806         /* Simple throttlerate management
2807          * 0-10MB/s   lower     (50000 ints/s)
2808          * 10-20MB/s   middle    (20000 ints/s)
2809          * 20-1249MB/s high      (18000 ints/s)
2810          * > 40000pps  ultra     (8000 ints/s)
2811          */
2812         new_flow_level = ring_group->coal.flow_level;
2813         new_int_gl = ring_group->coal.int_gl;
2814         time_passed_ms =
2815                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2816
2817         if (!time_passed_ms)
2818                 return false;
2819
2820         do_div(ring_group->total_packets, time_passed_ms);
2821         packets_per_msecs = ring_group->total_packets;
2822
2823         do_div(ring_group->total_bytes, time_passed_ms);
2824         bytes_per_msecs = ring_group->total_bytes;
2825
2826 #define HNS3_RX_LOW_BYTE_RATE 10000
2827 #define HNS3_RX_MID_BYTE_RATE 20000
2828
2829         switch (new_flow_level) {
2830         case HNS3_FLOW_LOW:
2831                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2832                         new_flow_level = HNS3_FLOW_MID;
2833                 break;
2834         case HNS3_FLOW_MID:
2835                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2836                         new_flow_level = HNS3_FLOW_HIGH;
2837                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2838                         new_flow_level = HNS3_FLOW_LOW;
2839                 break;
2840         case HNS3_FLOW_HIGH:
2841         case HNS3_FLOW_ULTRA:
2842         default:
2843                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2844                         new_flow_level = HNS3_FLOW_MID;
2845                 break;
2846         }
2847
2848 #define HNS3_RX_ULTRA_PACKET_RATE 40
2849
2850         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2851             &tqp_vector->rx_group == ring_group)
2852                 new_flow_level = HNS3_FLOW_ULTRA;
2853
2854         switch (new_flow_level) {
2855         case HNS3_FLOW_LOW:
2856                 new_int_gl = HNS3_INT_GL_50K;
2857                 break;
2858         case HNS3_FLOW_MID:
2859                 new_int_gl = HNS3_INT_GL_20K;
2860                 break;
2861         case HNS3_FLOW_HIGH:
2862                 new_int_gl = HNS3_INT_GL_18K;
2863                 break;
2864         case HNS3_FLOW_ULTRA:
2865                 new_int_gl = HNS3_INT_GL_8K;
2866                 break;
2867         default:
2868                 break;
2869         }
2870
2871         ring_group->total_bytes = 0;
2872         ring_group->total_packets = 0;
2873         ring_group->coal.flow_level = new_flow_level;
2874         if (new_int_gl != ring_group->coal.int_gl) {
2875                 ring_group->coal.int_gl = new_int_gl;
2876                 return true;
2877         }
2878         return false;
2879 }
2880
2881 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2882 {
2883         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2884         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2885         bool rx_update, tx_update;
2886
2887         /* update param every 1000ms */
2888         if (time_before(jiffies,
2889                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
2890                 return;
2891
2892         if (rx_group->coal.gl_adapt_enable) {
2893                 rx_update = hns3_get_new_int_gl(rx_group);
2894                 if (rx_update)
2895                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2896                                                        rx_group->coal.int_gl);
2897         }
2898
2899         if (tx_group->coal.gl_adapt_enable) {
2900                 tx_update = hns3_get_new_int_gl(&tqp_vector->tx_group);
2901                 if (tx_update)
2902                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2903                                                        tx_group->coal.int_gl);
2904         }
2905
2906         tqp_vector->last_jiffies = jiffies;
2907 }
2908
2909 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2910 {
2911         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
2912         struct hns3_enet_ring *ring;
2913         int rx_pkt_total = 0;
2914
2915         struct hns3_enet_tqp_vector *tqp_vector =
2916                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2917         bool clean_complete = true;
2918         int rx_budget;
2919
2920         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2921                 napi_complete(napi);
2922                 return 0;
2923         }
2924
2925         /* Since the actual Tx work is minimal, we can give the Tx a larger
2926          * budget and be more aggressive about cleaning up the Tx descriptors.
2927          */
2928         hns3_for_each_ring(ring, tqp_vector->tx_group)
2929                 hns3_clean_tx_ring(ring);
2930
2931         /* make sure rx ring budget not smaller than 1 */
2932         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2933
2934         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2935                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2936                                                     hns3_rx_skb);
2937
2938                 if (rx_cleaned >= rx_budget)
2939                         clean_complete = false;
2940
2941                 rx_pkt_total += rx_cleaned;
2942         }
2943
2944         tqp_vector->rx_group.total_packets += rx_pkt_total;
2945
2946         if (!clean_complete)
2947                 return budget;
2948
2949         if (napi_complete(napi) &&
2950             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2951                 hns3_update_new_int_gl(tqp_vector);
2952                 hns3_mask_vector_irq(tqp_vector, 1);
2953         }
2954
2955         return rx_pkt_total;
2956 }
2957
2958 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2959                                       struct hnae3_ring_chain_node *head)
2960 {
2961         struct pci_dev *pdev = tqp_vector->handle->pdev;
2962         struct hnae3_ring_chain_node *cur_chain = head;
2963         struct hnae3_ring_chain_node *chain;
2964         struct hns3_enet_ring *tx_ring;
2965         struct hns3_enet_ring *rx_ring;
2966
2967         tx_ring = tqp_vector->tx_group.ring;
2968         if (tx_ring) {
2969                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2970                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2971                               HNAE3_RING_TYPE_TX);
2972                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2973                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2974
2975                 cur_chain->next = NULL;
2976
2977                 while (tx_ring->next) {
2978                         tx_ring = tx_ring->next;
2979
2980                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2981                                              GFP_KERNEL);
2982                         if (!chain)
2983                                 goto err_free_chain;
2984
2985                         cur_chain->next = chain;
2986                         chain->tqp_index = tx_ring->tqp->tqp_index;
2987                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2988                                       HNAE3_RING_TYPE_TX);
2989                         hnae3_set_field(chain->int_gl_idx,
2990                                         HNAE3_RING_GL_IDX_M,
2991                                         HNAE3_RING_GL_IDX_S,
2992                                         HNAE3_RING_GL_TX);
2993
2994                         cur_chain = chain;
2995                 }
2996         }
2997
2998         rx_ring = tqp_vector->rx_group.ring;
2999         if (!tx_ring && rx_ring) {
3000                 cur_chain->next = NULL;
3001                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
3002                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3003                               HNAE3_RING_TYPE_RX);
3004                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3005                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3006
3007                 rx_ring = rx_ring->next;
3008         }
3009
3010         while (rx_ring) {
3011                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
3012                 if (!chain)
3013                         goto err_free_chain;
3014
3015                 cur_chain->next = chain;
3016                 chain->tqp_index = rx_ring->tqp->tqp_index;
3017                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3018                               HNAE3_RING_TYPE_RX);
3019                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3020                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3021
3022                 cur_chain = chain;
3023
3024                 rx_ring = rx_ring->next;
3025         }
3026
3027         return 0;
3028
3029 err_free_chain:
3030         cur_chain = head->next;
3031         while (cur_chain) {
3032                 chain = cur_chain->next;
3033                 devm_kfree(&pdev->dev, cur_chain);
3034                 cur_chain = chain;
3035         }
3036         head->next = NULL;
3037
3038         return -ENOMEM;
3039 }
3040
3041 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3042                                         struct hnae3_ring_chain_node *head)
3043 {
3044         struct pci_dev *pdev = tqp_vector->handle->pdev;
3045         struct hnae3_ring_chain_node *chain_tmp, *chain;
3046
3047         chain = head->next;
3048
3049         while (chain) {
3050                 chain_tmp = chain->next;
3051                 devm_kfree(&pdev->dev, chain);
3052                 chain = chain_tmp;
3053         }
3054 }
3055
3056 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3057                                    struct hns3_enet_ring *ring)
3058 {
3059         ring->next = group->ring;
3060         group->ring = ring;
3061
3062         group->count++;
3063 }
3064
3065 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3066 {
3067         struct pci_dev *pdev = priv->ae_handle->pdev;
3068         struct hns3_enet_tqp_vector *tqp_vector;
3069         int num_vectors = priv->vector_num;
3070         int numa_node;
3071         int vector_i;
3072
3073         numa_node = dev_to_node(&pdev->dev);
3074
3075         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3076                 tqp_vector = &priv->tqp_vector[vector_i];
3077                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3078                                 &tqp_vector->affinity_mask);
3079         }
3080 }
3081
3082 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3083 {
3084         struct hnae3_ring_chain_node vector_ring_chain;
3085         struct hnae3_handle *h = priv->ae_handle;
3086         struct hns3_enet_tqp_vector *tqp_vector;
3087         int ret = 0;
3088         int i;
3089
3090         hns3_nic_set_cpumask(priv);
3091
3092         for (i = 0; i < priv->vector_num; i++) {
3093                 tqp_vector = &priv->tqp_vector[i];
3094                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3095                 tqp_vector->num_tqps = 0;
3096         }
3097
3098         for (i = 0; i < h->kinfo.num_tqps; i++) {
3099                 u16 vector_i = i % priv->vector_num;
3100                 u16 tqp_num = h->kinfo.num_tqps;
3101
3102                 tqp_vector = &priv->tqp_vector[vector_i];
3103
3104                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3105                                        priv->ring_data[i].ring);
3106
3107                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3108                                        priv->ring_data[i + tqp_num].ring);
3109
3110                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3111                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3112                 tqp_vector->num_tqps++;
3113         }
3114
3115         for (i = 0; i < priv->vector_num; i++) {
3116                 tqp_vector = &priv->tqp_vector[i];
3117
3118                 tqp_vector->rx_group.total_bytes = 0;
3119                 tqp_vector->rx_group.total_packets = 0;
3120                 tqp_vector->tx_group.total_bytes = 0;
3121                 tqp_vector->tx_group.total_packets = 0;
3122                 tqp_vector->handle = h;
3123
3124                 ret = hns3_get_vector_ring_chain(tqp_vector,
3125                                                  &vector_ring_chain);
3126                 if (ret)
3127                         goto map_ring_fail;
3128
3129                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3130                         tqp_vector->vector_irq, &vector_ring_chain);
3131
3132                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3133
3134                 if (ret)
3135                         goto map_ring_fail;
3136
3137                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3138                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3139         }
3140
3141         return 0;
3142
3143 map_ring_fail:
3144         while (i--)
3145                 netif_napi_del(&priv->tqp_vector[i].napi);
3146
3147         return ret;
3148 }
3149
3150 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3151 {
3152 #define HNS3_VECTOR_PF_MAX_NUM          64
3153
3154         struct hnae3_handle *h = priv->ae_handle;
3155         struct hns3_enet_tqp_vector *tqp_vector;
3156         struct hnae3_vector_info *vector;
3157         struct pci_dev *pdev = h->pdev;
3158         u16 tqp_num = h->kinfo.num_tqps;
3159         u16 vector_num;
3160         int ret = 0;
3161         u16 i;
3162
3163         /* RSS size, cpu online and vector_num should be the same */
3164         /* Should consider 2p/4p later */
3165         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3166         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3167
3168         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3169                               GFP_KERNEL);
3170         if (!vector)
3171                 return -ENOMEM;
3172
3173         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3174
3175         priv->vector_num = vector_num;
3176         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3177                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3178                              GFP_KERNEL);
3179         if (!priv->tqp_vector) {
3180                 ret = -ENOMEM;
3181                 goto out;
3182         }
3183
3184         for (i = 0; i < priv->vector_num; i++) {
3185                 tqp_vector = &priv->tqp_vector[i];
3186                 tqp_vector->idx = i;
3187                 tqp_vector->mask_addr = vector[i].io_addr;
3188                 tqp_vector->vector_irq = vector[i].vector;
3189                 hns3_vector_gl_rl_init(tqp_vector, priv);
3190         }
3191
3192 out:
3193         devm_kfree(&pdev->dev, vector);
3194         return ret;
3195 }
3196
3197 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3198 {
3199         group->ring = NULL;
3200         group->count = 0;
3201 }
3202
3203 static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3204 {
3205         struct hnae3_ring_chain_node vector_ring_chain;
3206         struct hnae3_handle *h = priv->ae_handle;
3207         struct hns3_enet_tqp_vector *tqp_vector;
3208         int i, ret;
3209
3210         for (i = 0; i < priv->vector_num; i++) {
3211                 tqp_vector = &priv->tqp_vector[i];
3212
3213                 if (!tqp_vector->rx_group.ring && !tqp_vector->tx_group.ring)
3214                         continue;
3215
3216                 ret = hns3_get_vector_ring_chain(tqp_vector,
3217                                                  &vector_ring_chain);
3218                 if (ret)
3219                         return ret;
3220
3221                 ret = h->ae_algo->ops->unmap_ring_from_vector(h,
3222                         tqp_vector->vector_irq, &vector_ring_chain);
3223                 if (ret)
3224                         return ret;
3225
3226                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3227
3228                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3229                         irq_set_affinity_notifier(tqp_vector->vector_irq,
3230                                                   NULL);
3231                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3232                         free_irq(tqp_vector->vector_irq, tqp_vector);
3233                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3234                 }
3235
3236                 hns3_clear_ring_group(&tqp_vector->rx_group);
3237                 hns3_clear_ring_group(&tqp_vector->tx_group);
3238                 netif_napi_del(&priv->tqp_vector[i].napi);
3239         }
3240
3241         return 0;
3242 }
3243
3244 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3245 {
3246         struct hnae3_handle *h = priv->ae_handle;
3247         struct pci_dev *pdev = h->pdev;
3248         int i, ret;
3249
3250         for (i = 0; i < priv->vector_num; i++) {
3251                 struct hns3_enet_tqp_vector *tqp_vector;
3252
3253                 tqp_vector = &priv->tqp_vector[i];
3254                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3255                 if (ret)
3256                         return ret;
3257         }
3258
3259         devm_kfree(&pdev->dev, priv->tqp_vector);
3260         return 0;
3261 }
3262
3263 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3264                              int ring_type)
3265 {
3266         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3267         int queue_num = priv->ae_handle->kinfo.num_tqps;
3268         int desc_num = priv->ae_handle->kinfo.num_desc;
3269         struct pci_dev *pdev = priv->ae_handle->pdev;
3270         struct hns3_enet_ring *ring;
3271
3272         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3273         if (!ring)
3274                 return -ENOMEM;
3275
3276         if (ring_type == HNAE3_RING_TYPE_TX) {
3277                 ring_data[q->tqp_index].ring = ring;
3278                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3279                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3280         } else {
3281                 ring_data[q->tqp_index + queue_num].ring = ring;
3282                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3283                 ring->io_base = q->io_base;
3284         }
3285
3286         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3287
3288         ring->tqp = q;
3289         ring->desc = NULL;
3290         ring->desc_cb = NULL;
3291         ring->dev = priv->dev;
3292         ring->desc_dma_addr = 0;
3293         ring->buf_size = q->buf_size;
3294         ring->desc_num = desc_num;
3295         ring->next_to_use = 0;
3296         ring->next_to_clean = 0;
3297
3298         return 0;
3299 }
3300
3301 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3302                               struct hns3_nic_priv *priv)
3303 {
3304         int ret;
3305
3306         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3307         if (ret)
3308                 return ret;
3309
3310         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3311         if (ret) {
3312                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3313                 return ret;
3314         }
3315
3316         return 0;
3317 }
3318
3319 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3320 {
3321         struct hnae3_handle *h = priv->ae_handle;
3322         struct pci_dev *pdev = h->pdev;
3323         int i, ret;
3324
3325         priv->ring_data =  devm_kzalloc(&pdev->dev,
3326                                         array3_size(h->kinfo.num_tqps,
3327                                                     sizeof(*priv->ring_data),
3328                                                     2),
3329                                         GFP_KERNEL);
3330         if (!priv->ring_data)
3331                 return -ENOMEM;
3332
3333         for (i = 0; i < h->kinfo.num_tqps; i++) {
3334                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3335                 if (ret)
3336                         goto err;
3337         }
3338
3339         return 0;
3340 err:
3341         while (i--) {
3342                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3343                 devm_kfree(priv->dev,
3344                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3345         }
3346
3347         devm_kfree(&pdev->dev, priv->ring_data);
3348         return ret;
3349 }
3350
3351 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3352 {
3353         struct hnae3_handle *h = priv->ae_handle;
3354         int i;
3355
3356         for (i = 0; i < h->kinfo.num_tqps; i++) {
3357                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3358                 devm_kfree(priv->dev,
3359                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3360         }
3361         devm_kfree(priv->dev, priv->ring_data);
3362 }
3363
3364 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3365 {
3366         int ret;
3367
3368         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3369                 return -EINVAL;
3370
3371         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
3372                                 GFP_KERNEL);
3373         if (!ring->desc_cb) {
3374                 ret = -ENOMEM;
3375                 goto out;
3376         }
3377
3378         ret = hns3_alloc_desc(ring);
3379         if (ret)
3380                 goto out_with_desc_cb;
3381
3382         if (!HNAE3_IS_TX_RING(ring)) {
3383                 ret = hns3_alloc_ring_buffers(ring);
3384                 if (ret)
3385                         goto out_with_desc;
3386         }
3387
3388         return 0;
3389
3390 out_with_desc:
3391         hns3_free_desc(ring);
3392 out_with_desc_cb:
3393         kfree(ring->desc_cb);
3394         ring->desc_cb = NULL;
3395 out:
3396         return ret;
3397 }
3398
3399 static void hns3_fini_ring(struct hns3_enet_ring *ring)
3400 {
3401         hns3_free_desc(ring);
3402         kfree(ring->desc_cb);
3403         ring->desc_cb = NULL;
3404         ring->next_to_clean = 0;
3405         ring->next_to_use = 0;
3406         ring->pending_buf = 0;
3407         if (ring->skb) {
3408                 dev_kfree_skb_any(ring->skb);
3409                 ring->skb = NULL;
3410         }
3411 }
3412
3413 static int hns3_buf_size2type(u32 buf_size)
3414 {
3415         int bd_size_type;
3416
3417         switch (buf_size) {
3418         case 512:
3419                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3420                 break;
3421         case 1024:
3422                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3423                 break;
3424         case 2048:
3425                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3426                 break;
3427         case 4096:
3428                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3429                 break;
3430         default:
3431                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3432         }
3433
3434         return bd_size_type;
3435 }
3436
3437 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3438 {
3439         dma_addr_t dma = ring->desc_dma_addr;
3440         struct hnae3_queue *q = ring->tqp;
3441
3442         if (!HNAE3_IS_TX_RING(ring)) {
3443                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3444                                (u32)dma);
3445                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3446                                (u32)((dma >> 31) >> 1));
3447
3448                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3449                                hns3_buf_size2type(ring->buf_size));
3450                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3451                                ring->desc_num / 8 - 1);
3452
3453         } else {
3454                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3455                                (u32)dma);
3456                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3457                                (u32)((dma >> 31) >> 1));
3458
3459                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3460                                ring->desc_num / 8 - 1);
3461         }
3462 }
3463
3464 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3465 {
3466         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3467         int i;
3468
3469         for (i = 0; i < HNAE3_MAX_TC; i++) {
3470                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3471                 int j;
3472
3473                 if (!tc_info->enable)
3474                         continue;
3475
3476                 for (j = 0; j < tc_info->tqp_count; j++) {
3477                         struct hnae3_queue *q;
3478
3479                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3480                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3481                                        tc_info->tc);
3482                 }
3483         }
3484 }
3485
3486 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3487 {
3488         struct hnae3_handle *h = priv->ae_handle;
3489         int ring_num = h->kinfo.num_tqps * 2;
3490         int i, j;
3491         int ret;
3492
3493         for (i = 0; i < ring_num; i++) {
3494                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3495                 if (ret) {
3496                         dev_err(priv->dev,
3497                                 "Alloc ring memory fail! ret=%d\n", ret);
3498                         goto out_when_alloc_ring_memory;
3499                 }
3500
3501                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3502         }
3503
3504         return 0;
3505
3506 out_when_alloc_ring_memory:
3507         for (j = i - 1; j >= 0; j--)
3508                 hns3_fini_ring(priv->ring_data[j].ring);
3509
3510         return -ENOMEM;
3511 }
3512
3513 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3514 {
3515         struct hnae3_handle *h = priv->ae_handle;
3516         int i;
3517
3518         for (i = 0; i < h->kinfo.num_tqps; i++) {
3519                 hns3_fini_ring(priv->ring_data[i].ring);
3520                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3521         }
3522         return 0;
3523 }
3524
3525 /* Set mac addr if it is configured. or leave it to the AE driver */
3526 static int hns3_init_mac_addr(struct net_device *netdev, bool init)
3527 {
3528         struct hns3_nic_priv *priv = netdev_priv(netdev);
3529         struct hnae3_handle *h = priv->ae_handle;
3530         u8 mac_addr_temp[ETH_ALEN];
3531         int ret = 0;
3532
3533         if (h->ae_algo->ops->get_mac_addr && init) {
3534                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3535                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3536         }
3537
3538         /* Check if the MAC address is valid, if not get a random one */
3539         if (!is_valid_ether_addr(netdev->dev_addr)) {
3540                 eth_hw_addr_random(netdev);
3541                 dev_warn(priv->dev, "using random MAC address %pM\n",
3542                          netdev->dev_addr);
3543         }
3544
3545         if (h->ae_algo->ops->set_mac_addr)
3546                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3547
3548         return ret;
3549 }
3550
3551 static int hns3_restore_fd_rules(struct net_device *netdev)
3552 {
3553         struct hnae3_handle *h = hns3_get_handle(netdev);
3554         int ret = 0;
3555
3556         if (h->ae_algo->ops->restore_fd_rules)
3557                 ret = h->ae_algo->ops->restore_fd_rules(h);
3558
3559         return ret;
3560 }
3561
3562 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3563 {
3564         struct hnae3_handle *h = hns3_get_handle(netdev);
3565
3566         if (h->ae_algo->ops->del_all_fd_entries)
3567                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3568 }
3569
3570 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3571 {
3572         struct hns3_nic_priv *priv = netdev_priv(netdev);
3573
3574         priv->ops.fill_desc = hns3_fill_desc;
3575         if ((netdev->features & NETIF_F_TSO) ||
3576             (netdev->features & NETIF_F_TSO6))
3577                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3578         else
3579                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3580 }
3581
3582 static int hns3_client_start(struct hnae3_handle *handle)
3583 {
3584         if (!handle->ae_algo->ops->client_start)
3585                 return 0;
3586
3587         return handle->ae_algo->ops->client_start(handle);
3588 }
3589
3590 static void hns3_client_stop(struct hnae3_handle *handle)
3591 {
3592         if (!handle->ae_algo->ops->client_stop)
3593                 return;
3594
3595         handle->ae_algo->ops->client_stop(handle);
3596 }
3597
3598 static int hns3_client_init(struct hnae3_handle *handle)
3599 {
3600         struct pci_dev *pdev = handle->pdev;
3601         u16 alloc_tqps, max_rss_size;
3602         struct hns3_nic_priv *priv;
3603         struct net_device *netdev;
3604         int ret;
3605
3606         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3607                                                     &max_rss_size);
3608         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3609         if (!netdev)
3610                 return -ENOMEM;
3611
3612         priv = netdev_priv(netdev);
3613         priv->dev = &pdev->dev;
3614         priv->netdev = netdev;
3615         priv->ae_handle = handle;
3616         priv->tx_timeout_count = 0;
3617
3618         handle->kinfo.netdev = netdev;
3619         handle->priv = (void *)priv;
3620
3621         hns3_init_mac_addr(netdev, true);
3622
3623         hns3_set_default_feature(netdev);
3624
3625         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3626         netdev->priv_flags |= IFF_UNICAST_FLT;
3627         netdev->netdev_ops = &hns3_nic_netdev_ops;
3628         SET_NETDEV_DEV(netdev, &pdev->dev);
3629         hns3_ethtool_set_ops(netdev);
3630         hns3_nic_set_priv_ops(netdev);
3631
3632         /* Carrier off reporting is important to ethtool even BEFORE open */
3633         netif_carrier_off(netdev);
3634
3635         ret = hns3_get_ring_config(priv);
3636         if (ret) {
3637                 ret = -ENOMEM;
3638                 goto out_get_ring_cfg;
3639         }
3640
3641         ret = hns3_nic_alloc_vector_data(priv);
3642         if (ret) {
3643                 ret = -ENOMEM;
3644                 goto out_alloc_vector_data;
3645         }
3646
3647         ret = hns3_nic_init_vector_data(priv);
3648         if (ret) {
3649                 ret = -ENOMEM;
3650                 goto out_init_vector_data;
3651         }
3652
3653         ret = hns3_init_all_ring(priv);
3654         if (ret) {
3655                 ret = -ENOMEM;
3656                 goto out_init_ring_data;
3657         }
3658
3659         ret = register_netdev(netdev);
3660         if (ret) {
3661                 dev_err(priv->dev, "probe register netdev fail!\n");
3662                 goto out_reg_netdev_fail;
3663         }
3664
3665         ret = hns3_client_start(handle);
3666         if (ret) {
3667                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
3668                         goto out_reg_netdev_fail;
3669         }
3670
3671         hns3_dcbnl_setup(handle);
3672
3673         hns3_dbg_init(handle);
3674
3675         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
3676         netdev->max_mtu = HNS3_MAX_MTU;
3677
3678         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
3679
3680         return ret;
3681
3682 out_reg_netdev_fail:
3683 out_init_ring_data:
3684         (void)hns3_nic_uninit_vector_data(priv);
3685 out_init_vector_data:
3686         hns3_nic_dealloc_vector_data(priv);
3687 out_alloc_vector_data:
3688         priv->ring_data = NULL;
3689 out_get_ring_cfg:
3690         priv->ae_handle = NULL;
3691         free_netdev(netdev);
3692         return ret;
3693 }
3694
3695 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3696 {
3697         struct net_device *netdev = handle->kinfo.netdev;
3698         struct hns3_nic_priv *priv = netdev_priv(netdev);
3699         int ret;
3700
3701         hns3_client_stop(handle);
3702
3703         hns3_remove_hw_addr(netdev);
3704
3705         if (netdev->reg_state != NETREG_UNINITIALIZED)
3706                 unregister_netdev(netdev);
3707
3708         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
3709                 netdev_warn(netdev, "already uninitialized\n");
3710                 goto out_netdev_free;
3711         }
3712
3713         hns3_del_all_fd_rules(netdev, true);
3714
3715         hns3_force_clear_all_rx_ring(handle);
3716
3717         ret = hns3_nic_uninit_vector_data(priv);
3718         if (ret)
3719                 netdev_err(netdev, "uninit vector error\n");
3720
3721         ret = hns3_nic_dealloc_vector_data(priv);
3722         if (ret)
3723                 netdev_err(netdev, "dealloc vector error\n");
3724
3725         ret = hns3_uninit_all_ring(priv);
3726         if (ret)
3727                 netdev_err(netdev, "uninit ring error\n");
3728
3729         hns3_put_ring_config(priv);
3730
3731         hns3_dbg_uninit(handle);
3732
3733         priv->ring_data = NULL;
3734
3735 out_netdev_free:
3736         free_netdev(netdev);
3737 }
3738
3739 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3740 {
3741         struct net_device *netdev = handle->kinfo.netdev;
3742
3743         if (!netdev)
3744                 return;
3745
3746         if (linkup) {
3747                 netif_carrier_on(netdev);
3748                 netif_tx_wake_all_queues(netdev);
3749                 netdev_info(netdev, "link up\n");
3750         } else {
3751                 netif_carrier_off(netdev);
3752                 netif_tx_stop_all_queues(netdev);
3753                 netdev_info(netdev, "link down\n");
3754         }
3755 }
3756
3757 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3758 {
3759         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3760         struct net_device *ndev = kinfo->netdev;
3761
3762         if (tc > HNAE3_MAX_TC)
3763                 return -EINVAL;
3764
3765         if (!ndev)
3766                 return -ENODEV;
3767
3768         return hns3_nic_set_real_num_queue(ndev);
3769 }
3770
3771 static int hns3_recover_hw_addr(struct net_device *ndev)
3772 {
3773         struct netdev_hw_addr_list *list;
3774         struct netdev_hw_addr *ha, *tmp;
3775         int ret = 0;
3776
3777         /* go through and sync uc_addr entries to the device */
3778         list = &ndev->uc;
3779         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3780                 ret = hns3_nic_uc_sync(ndev, ha->addr);
3781                 if (ret)
3782                         return ret;
3783         }
3784
3785         /* go through and sync mc_addr entries to the device */
3786         list = &ndev->mc;
3787         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3788                 ret = hns3_nic_mc_sync(ndev, ha->addr);
3789                 if (ret)
3790                         return ret;
3791         }
3792
3793         return ret;
3794 }
3795
3796 static void hns3_remove_hw_addr(struct net_device *netdev)
3797 {
3798         struct netdev_hw_addr_list *list;
3799         struct netdev_hw_addr *ha, *tmp;
3800
3801         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
3802
3803         /* go through and unsync uc_addr entries to the device */
3804         list = &netdev->uc;
3805         list_for_each_entry_safe(ha, tmp, &list->list, list)
3806                 hns3_nic_uc_unsync(netdev, ha->addr);
3807
3808         /* go through and unsync mc_addr entries to the device */
3809         list = &netdev->mc;
3810         list_for_each_entry_safe(ha, tmp, &list->list, list)
3811                 if (ha->refcount > 1)
3812                         hns3_nic_mc_unsync(netdev, ha->addr);
3813 }
3814
3815 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3816 {
3817         while (ring->next_to_clean != ring->next_to_use) {
3818                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3819                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3820                 ring_ptr_move_fw(ring, next_to_clean);
3821         }
3822 }
3823
3824 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3825 {
3826         struct hns3_desc_cb res_cbs;
3827         int ret;
3828
3829         while (ring->next_to_use != ring->next_to_clean) {
3830                 /* When a buffer is not reused, it's memory has been
3831                  * freed in hns3_handle_rx_bd or will be freed by
3832                  * stack, so we need to replace the buffer here.
3833                  */
3834                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3835                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3836                         if (ret) {
3837                                 u64_stats_update_begin(&ring->syncp);
3838                                 ring->stats.sw_err_cnt++;
3839                                 u64_stats_update_end(&ring->syncp);
3840                                 /* if alloc new buffer fail, exit directly
3841                                  * and reclear in up flow.
3842                                  */
3843                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3844                                             "reserve buffer map failed, ret = %d\n",
3845                                             ret);
3846                                 return ret;
3847                         }
3848                         hns3_replace_buffer(ring, ring->next_to_use,
3849                                             &res_cbs);
3850                 }
3851                 ring_ptr_move_fw(ring, next_to_use);
3852         }
3853
3854         return 0;
3855 }
3856
3857 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3858 {
3859         while (ring->next_to_use != ring->next_to_clean) {
3860                 /* When a buffer is not reused, it's memory has been
3861                  * freed in hns3_handle_rx_bd or will be freed by
3862                  * stack, so only need to unmap the buffer here.
3863                  */
3864                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3865                         hns3_unmap_buffer(ring,
3866                                           &ring->desc_cb[ring->next_to_use]);
3867                         ring->desc_cb[ring->next_to_use].dma = 0;
3868                 }
3869
3870                 ring_ptr_move_fw(ring, next_to_use);
3871         }
3872 }
3873
3874 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3875 {
3876         struct net_device *ndev = h->kinfo.netdev;
3877         struct hns3_nic_priv *priv = netdev_priv(ndev);
3878         struct hns3_enet_ring *ring;
3879         u32 i;
3880
3881         for (i = 0; i < h->kinfo.num_tqps; i++) {
3882                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3883                 hns3_force_clear_rx_ring(ring);
3884         }
3885 }
3886
3887 static void hns3_clear_all_ring(struct hnae3_handle *h)
3888 {
3889         struct net_device *ndev = h->kinfo.netdev;
3890         struct hns3_nic_priv *priv = netdev_priv(ndev);
3891         u32 i;
3892
3893         for (i = 0; i < h->kinfo.num_tqps; i++) {
3894                 struct netdev_queue *dev_queue;
3895                 struct hns3_enet_ring *ring;
3896
3897                 ring = priv->ring_data[i].ring;
3898                 hns3_clear_tx_ring(ring);
3899                 dev_queue = netdev_get_tx_queue(ndev,
3900                                                 priv->ring_data[i].queue_index);
3901                 netdev_tx_reset_queue(dev_queue);
3902
3903                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3904                 /* Continue to clear other rings even if clearing some
3905                  * rings failed.
3906                  */
3907                 hns3_clear_rx_ring(ring);
3908         }
3909 }
3910
3911 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3912 {
3913         struct net_device *ndev = h->kinfo.netdev;
3914         struct hns3_nic_priv *priv = netdev_priv(ndev);
3915         struct hns3_enet_ring *rx_ring;
3916         int i, j;
3917         int ret;
3918
3919         for (i = 0; i < h->kinfo.num_tqps; i++) {
3920                 ret = h->ae_algo->ops->reset_queue(h, i);
3921                 if (ret)
3922                         return ret;
3923
3924                 hns3_init_ring_hw(priv->ring_data[i].ring);
3925
3926                 /* We need to clear tx ring here because self test will
3927                  * use the ring and will not run down before up
3928                  */
3929                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3930                 priv->ring_data[i].ring->next_to_clean = 0;
3931                 priv->ring_data[i].ring->next_to_use = 0;
3932
3933                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3934                 hns3_init_ring_hw(rx_ring);
3935                 ret = hns3_clear_rx_ring(rx_ring);
3936                 if (ret)
3937                         return ret;
3938
3939                 /* We can not know the hardware head and tail when this
3940                  * function is called in reset flow, so we reuse all desc.
3941                  */
3942                 for (j = 0; j < rx_ring->desc_num; j++)
3943                         hns3_reuse_buffer(rx_ring, j);
3944
3945                 rx_ring->next_to_clean = 0;
3946                 rx_ring->next_to_use = 0;
3947         }
3948
3949         hns3_init_tx_ring_tc(priv);
3950
3951         return 0;
3952 }
3953
3954 static void hns3_store_coal(struct hns3_nic_priv *priv)
3955 {
3956         /* ethtool only support setting and querying one coal
3957          * configuation for now, so save the vector 0' coal
3958          * configuation here in order to restore it.
3959          */
3960         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3961                sizeof(struct hns3_enet_coalesce));
3962         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3963                sizeof(struct hns3_enet_coalesce));
3964 }
3965
3966 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3967 {
3968         u16 vector_num = priv->vector_num;
3969         int i;
3970
3971         for (i = 0; i < vector_num; i++) {
3972                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3973                        sizeof(struct hns3_enet_coalesce));
3974                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3975                        sizeof(struct hns3_enet_coalesce));
3976         }
3977 }
3978
3979 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3980 {
3981         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
3982         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3983         struct net_device *ndev = kinfo->netdev;
3984         struct hns3_nic_priv *priv = netdev_priv(ndev);
3985
3986         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
3987                 return 0;
3988
3989         /* it is cumbersome for hardware to pick-and-choose entries for deletion
3990          * from table space. Hence, for function reset software intervention is
3991          * required to delete the entries
3992          */
3993         if (hns3_dev_ongoing_func_reset(ae_dev)) {
3994                 hns3_remove_hw_addr(ndev);
3995                 hns3_del_all_fd_rules(ndev, false);
3996         }
3997
3998         if (!netif_running(ndev))
3999                 return 0;
4000
4001         return hns3_nic_net_stop(ndev);
4002 }
4003
4004 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
4005 {
4006         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4007         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
4008         int ret = 0;
4009
4010         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4011
4012         if (netif_running(kinfo->netdev)) {
4013                 ret = hns3_nic_net_open(kinfo->netdev);
4014                 if (ret) {
4015                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4016                         netdev_err(kinfo->netdev,
4017                                    "hns net up fail, ret=%d!\n", ret);
4018                         return ret;
4019                 }
4020         }
4021
4022         return ret;
4023 }
4024
4025 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4026 {
4027         struct net_device *netdev = handle->kinfo.netdev;
4028         struct hns3_nic_priv *priv = netdev_priv(netdev);
4029         int ret;
4030
4031         /* Carrier off reporting is important to ethtool even BEFORE open */
4032         netif_carrier_off(netdev);
4033
4034         ret = hns3_get_ring_config(priv);
4035         if (ret)
4036                 return ret;
4037
4038         ret = hns3_nic_alloc_vector_data(priv);
4039         if (ret)
4040                 goto err_put_ring;
4041
4042         hns3_restore_coal(priv);
4043
4044         ret = hns3_nic_init_vector_data(priv);
4045         if (ret)
4046                 goto err_dealloc_vector;
4047
4048         ret = hns3_init_all_ring(priv);
4049         if (ret)
4050                 goto err_uninit_vector;
4051
4052         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4053
4054         return ret;
4055
4056 err_uninit_vector:
4057         hns3_nic_uninit_vector_data(priv);
4058         priv->ring_data = NULL;
4059 err_dealloc_vector:
4060         hns3_nic_dealloc_vector_data(priv);
4061 err_put_ring:
4062         hns3_put_ring_config(priv);
4063         priv->ring_data = NULL;
4064
4065         return ret;
4066 }
4067
4068 static int hns3_reset_notify_restore_enet(struct hnae3_handle *handle)
4069 {
4070         struct net_device *netdev = handle->kinfo.netdev;
4071         bool vlan_filter_enable;
4072         int ret;
4073
4074         ret = hns3_init_mac_addr(netdev, false);
4075         if (ret)
4076                 return ret;
4077
4078         ret = hns3_recover_hw_addr(netdev);
4079         if (ret)
4080                 return ret;
4081
4082         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4083         if (ret)
4084                 return ret;
4085
4086         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4087         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4088
4089         /* Hardware table is only clear when pf resets */
4090         if (!(handle->flags & HNAE3_SUPPORT_VF)) {
4091                 ret = hns3_restore_vlan(netdev);
4092                 if (ret)
4093                         return ret;
4094         }
4095
4096         return hns3_restore_fd_rules(netdev);
4097 }
4098
4099 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4100 {
4101         struct net_device *netdev = handle->kinfo.netdev;
4102         struct hns3_nic_priv *priv = netdev_priv(netdev);
4103         int ret;
4104
4105         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4106                 netdev_warn(netdev, "already uninitialized\n");
4107                 return 0;
4108         }
4109
4110         hns3_force_clear_all_rx_ring(handle);
4111
4112         ret = hns3_nic_uninit_vector_data(priv);
4113         if (ret) {
4114                 netdev_err(netdev, "uninit vector error\n");
4115                 return ret;
4116         }
4117
4118         hns3_store_coal(priv);
4119
4120         ret = hns3_nic_dealloc_vector_data(priv);
4121         if (ret)
4122                 netdev_err(netdev, "dealloc vector error\n");
4123
4124         ret = hns3_uninit_all_ring(priv);
4125         if (ret)
4126                 netdev_err(netdev, "uninit ring error\n");
4127
4128         hns3_put_ring_config(priv);
4129         priv->ring_data = NULL;
4130
4131         clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
4132
4133         return ret;
4134 }
4135
4136 static int hns3_reset_notify(struct hnae3_handle *handle,
4137                              enum hnae3_reset_notify_type type)
4138 {
4139         int ret = 0;
4140
4141         switch (type) {
4142         case HNAE3_UP_CLIENT:
4143                 ret = hns3_reset_notify_up_enet(handle);
4144                 break;
4145         case HNAE3_DOWN_CLIENT:
4146                 ret = hns3_reset_notify_down_enet(handle);
4147                 break;
4148         case HNAE3_INIT_CLIENT:
4149                 ret = hns3_reset_notify_init_enet(handle);
4150                 break;
4151         case HNAE3_UNINIT_CLIENT:
4152                 ret = hns3_reset_notify_uninit_enet(handle);
4153                 break;
4154         case HNAE3_RESTORE_CLIENT:
4155                 ret = hns3_reset_notify_restore_enet(handle);
4156                 break;
4157         default:
4158                 break;
4159         }
4160
4161         return ret;
4162 }
4163
4164 int hns3_set_channels(struct net_device *netdev,
4165                       struct ethtool_channels *ch)
4166 {
4167         struct hnae3_handle *h = hns3_get_handle(netdev);
4168         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4169         bool rxfh_configured = netif_is_rxfh_configured(netdev);
4170         u32 new_tqp_num = ch->combined_count;
4171         u16 org_tqp_num;
4172         int ret;
4173
4174         if (ch->rx_count || ch->tx_count)
4175                 return -EINVAL;
4176
4177         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4178             new_tqp_num < 1) {
4179                 dev_err(&netdev->dev,
4180                         "Change tqps fail, the tqp range is from 1 to %d",
4181                         hns3_get_max_available_channels(h));
4182                 return -EINVAL;
4183         }
4184
4185         if (kinfo->rss_size == new_tqp_num)
4186                 return 0;
4187
4188         ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
4189         if (ret)
4190                 return ret;
4191
4192         ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
4193         if (ret)
4194                 return ret;
4195
4196         org_tqp_num = h->kinfo.num_tqps;
4197         ret = h->ae_algo->ops->set_channels(h, new_tqp_num, rxfh_configured);
4198         if (ret) {
4199                 ret = h->ae_algo->ops->set_channels(h, org_tqp_num,
4200                                                     rxfh_configured);
4201                 if (ret) {
4202                         /* If revert to old tqp failed, fatal error occurred */
4203                         dev_err(&netdev->dev,
4204                                 "Revert to old tqp num fail, ret=%d", ret);
4205                         return ret;
4206                 }
4207                 dev_info(&netdev->dev,
4208                          "Change tqp num fail, Revert to old tqp num");
4209         }
4210         ret = hns3_reset_notify(h, HNAE3_INIT_CLIENT);
4211         if (ret)
4212                 return ret;
4213
4214         return hns3_reset_notify(h, HNAE3_UP_CLIENT);
4215 }
4216
4217 static const struct hnae3_client_ops client_ops = {
4218         .init_instance = hns3_client_init,
4219         .uninit_instance = hns3_client_uninit,
4220         .link_status_change = hns3_link_status_change,
4221         .setup_tc = hns3_client_setup_tc,
4222         .reset_notify = hns3_reset_notify,
4223 };
4224
4225 /* hns3_init_module - Driver registration routine
4226  * hns3_init_module is the first routine called when the driver is
4227  * loaded. All it does is register with the PCI subsystem.
4228  */
4229 static int __init hns3_init_module(void)
4230 {
4231         int ret;
4232
4233         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4234         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4235
4236         client.type = HNAE3_CLIENT_KNIC;
4237         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4238                  hns3_driver_name);
4239
4240         client.ops = &client_ops;
4241
4242         INIT_LIST_HEAD(&client.node);
4243
4244         hns3_dbg_register_debugfs(hns3_driver_name);
4245
4246         ret = hnae3_register_client(&client);
4247         if (ret)
4248                 goto err_reg_client;
4249
4250         ret = pci_register_driver(&hns3_driver);
4251         if (ret)
4252                 goto err_reg_driver;
4253
4254         return ret;
4255
4256 err_reg_driver:
4257         hnae3_unregister_client(&client);
4258 err_reg_client:
4259         hns3_dbg_unregister_debugfs();
4260         return ret;
4261 }
4262 module_init(hns3_init_module);
4263
4264 /* hns3_exit_module - Driver exit cleanup routine
4265  * hns3_exit_module is called just before the driver is removed
4266  * from memory.
4267  */
4268 static void __exit hns3_exit_module(void)
4269 {
4270         pci_unregister_driver(&hns3_driver);
4271         hnae3_unregister_client(&client);
4272         hns3_dbg_unregister_debugfs();
4273 }
4274 module_exit(hns3_exit_module);
4275
4276 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4277 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4278 MODULE_LICENSE("GPL");
4279 MODULE_ALIAS("pci:hns-nic");
4280 MODULE_VERSION(HNS3_MOD_VERSION);