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         clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 352
 353         /* enable the vectors */
 354         for (i = 0; i < priv->vector_num; i++)
 355                 hns3_vector_enable(&priv->tqp_vector[i]);
 356
 357         /* enable rcb */
 358         for (j = 0; j < h->kinfo.num_tqps; j++)
 359                 hns3_tqp_enable(h->kinfo.tqp[j]);
 360
 361         /* start the ae_dev */
 362         ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
 363         if (ret)
 364                 goto out_start_err;
 365
 366         return 0;
 367
 368 out_start_err:
 369         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 370         while (j--)
 371                 hns3_tqp_disable(h->kinfo.tqp[j]);
 372
 373         for (j = i - 1; j >= 0; j--)
 374                 hns3_vector_disable(&priv->tqp_vector[j]);
 375
 376         hns3_nic_uninit_irq(priv);
 377
 378         return ret;
 379 }
 380
 381 static void hns3_config_xps(struct hns3_nic_priv *priv)
 382 {
 383         int i;
 384
 385         for (i = 0; i < priv->vector_num; i++) {
 386                 struct hns3_enet_tqp_vector *tqp_vector = &priv->tqp_vector[i];
 387                 struct hns3_enet_ring *ring = tqp_vector->tx_group.ring;
 388
 389                 while (ring) {
 390                         int ret;
 391
 392                         ret = netif_set_xps_queue(priv->netdev,
 393                                                   &tqp_vector->affinity_mask,
 394                                                   ring->tqp->tqp_index);
 395                         if (ret)
 396                                 netdev_warn(priv->netdev,
 397                                             "set xps queue failed: %d", ret);
 398
 399                         ring = ring->next;
 400                 }
 401         }
 402 }
 403
 404 static int hns3_nic_net_open(struct net_device *netdev)
 405 {
 406         struct hns3_nic_priv *priv = netdev_priv(netdev);
 407         struct hnae3_handle *h = hns3_get_handle(netdev);
 408         struct hnae3_knic_private_info *kinfo;
 409         int i, ret;
 410
 411         if (hns3_nic_resetting(netdev))
 412                 return -EBUSY;
 413
 414         netif_carrier_off(netdev);
 415
 416         ret = hns3_nic_set_real_num_queue(netdev);
 417         if (ret)
 418                 return ret;
 419
 420         ret = hns3_nic_net_up(netdev);
 421         if (ret) {
 422                 netdev_err(netdev,
 423                            "hns net up fail, ret=%d!\n", ret);
 424                 return ret;
 425         }
 426
 427         kinfo = &h->kinfo;
 428         for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) {
 429                 netdev_set_prio_tc_map(netdev, i,
 430                                        kinfo->prio_tc[i]);
 431         }
 432
 433         if (h->ae_algo->ops->set_timer_task)
 434                 h->ae_algo->ops->set_timer_task(priv->ae_handle, true);
 435
 436         hns3_config_xps(priv);
 437         return 0;
 438 }
 439
 440 static void hns3_nic_net_down(struct net_device *netdev)
 441 {
 442         struct hns3_nic_priv *priv = netdev_priv(netdev);
 443         struct hnae3_handle *h = hns3_get_handle(netdev);
 444         const struct hnae3_ae_ops *ops;
 445         int i;
 446
 447         /* disable vectors */
 448         for (i = 0; i < priv->vector_num; i++)
 449                 hns3_vector_disable(&priv->tqp_vector[i]);
 450
 451         /* disable rcb */
 452         for (i = 0; i < h->kinfo.num_tqps; i++)
 453                 hns3_tqp_disable(h->kinfo.tqp[i]);
 454
 455         /* stop ae_dev */
 456         ops = priv->ae_handle->ae_algo->ops;
 457         if (ops->stop)
 458                 ops->stop(priv->ae_handle);
 459
 460         /* free irq resources */
 461         hns3_nic_uninit_irq(priv);
 462
 463         hns3_clear_all_ring(priv->ae_handle);
 464 }
 465
 466 static int hns3_nic_net_stop(struct net_device *netdev)
 467 {
 468         struct hns3_nic_priv *priv = netdev_priv(netdev);
 469         struct hnae3_handle *h = hns3_get_handle(netdev);
 470
 471         if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
 472                 return 0;
 473
 474         if (h->ae_algo->ops->set_timer_task)
 475                 h->ae_algo->ops->set_timer_task(priv->ae_handle, false);
 476
 477         netif_tx_stop_all_queues(netdev);
 478         netif_carrier_off(netdev);
 479
 480         hns3_nic_net_down(netdev);
 481
 482         return 0;
 483 }
 484
 485 static int hns3_nic_uc_sync(struct net_device *netdev,
 486                             const unsigned char *addr)
 487 {
 488         struct hnae3_handle *h = hns3_get_handle(netdev);
 489
 490         if (h->ae_algo->ops->add_uc_addr)
 491                 return h->ae_algo->ops->add_uc_addr(h, addr);
 492
 493         return 0;
 494 }
 495
 496 static int hns3_nic_uc_unsync(struct net_device *netdev,
 497                               const unsigned char *addr)
 498 {
 499         struct hnae3_handle *h = hns3_get_handle(netdev);
 500
 501         if (h->ae_algo->ops->rm_uc_addr)
 502                 return h->ae_algo->ops->rm_uc_addr(h, addr);
 503
 504         return 0;
 505 }
 506
 507 static int hns3_nic_mc_sync(struct net_device *netdev,
 508                             const unsigned char *addr)
 509 {
 510         struct hnae3_handle *h = hns3_get_handle(netdev);
 511
 512         if (h->ae_algo->ops->add_mc_addr)
 513                 return h->ae_algo->ops->add_mc_addr(h, addr);
 514
 515         return 0;
 516 }
 517
 518 static int hns3_nic_mc_unsync(struct net_device *netdev,
 519                               const unsigned char *addr)
 520 {
 521         struct hnae3_handle *h = hns3_get_handle(netdev);
 522
 523         if (h->ae_algo->ops->rm_mc_addr)
 524                 return h->ae_algo->ops->rm_mc_addr(h, addr);
 525
 526         return 0;
 527 }
 528
 529 static u8 hns3_get_netdev_flags(struct net_device *netdev)
 530 {
 531         u8 flags = 0;
 532
 533         if (netdev->flags & IFF_PROMISC) {
 534                 flags = HNAE3_USER_UPE | HNAE3_USER_MPE | HNAE3_BPE;
 535         } else {
 536                 flags |= HNAE3_VLAN_FLTR;
 537                 if (netdev->flags & IFF_ALLMULTI)
 538                         flags |= HNAE3_USER_MPE;
 539         }
 540
 541         return flags;
 542 }
 543
 544 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 545 {
 546         struct hnae3_handle *h = hns3_get_handle(netdev);
 547         u8 new_flags;
 548         int ret;
 549
 550         new_flags = hns3_get_netdev_flags(netdev);
 551
 552         ret = __dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync);
 553         if (ret) {
 554                 netdev_err(netdev, "sync uc address fail\n");
 555                 if (ret == -ENOSPC)
 556                         new_flags |= HNAE3_OVERFLOW_UPE;
 557         }
 558
 559         if (netdev->flags & IFF_MULTICAST) {
 560                 ret = __dev_mc_sync(netdev, hns3_nic_mc_sync,
 561                                     hns3_nic_mc_unsync);
 562                 if (ret) {
 563                         netdev_err(netdev, "sync mc address fail\n");
 564                         if (ret == -ENOSPC)
 565                                 new_flags |= HNAE3_OVERFLOW_MPE;
 566                 }
 567         }
 568
 569         /* User mode Promisc mode enable and vlan filtering is disabled to
 570          * let all packets in. MAC-VLAN Table overflow Promisc enabled and
 571          * vlan fitering is enabled
 572          */
 573         hns3_enable_vlan_filter(netdev, new_flags & HNAE3_VLAN_FLTR);
 574         h->netdev_flags = new_flags;
 575         hns3_update_promisc_mode(netdev, new_flags);
 576 }
 577
 578 int hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags)
 579 {
 580         struct hns3_nic_priv *priv = netdev_priv(netdev);
 581         struct hnae3_handle *h = priv->ae_handle;
 582
 583         if (h->ae_algo->ops->set_promisc_mode) {
 584                 return h->ae_algo->ops->set_promisc_mode(h,
 585                                                 promisc_flags & HNAE3_UPE,
 586                                                 promisc_flags & HNAE3_MPE);
 587         }
 588
 589         return 0;
 590 }
 591
 592 void hns3_enable_vlan_filter(struct net_device *netdev, bool enable)
 593 {
 594         struct hns3_nic_priv *priv = netdev_priv(netdev);
 595         struct hnae3_handle *h = priv->ae_handle;
 596         bool last_state;
 597
 598         if (h->pdev->revision >= 0x21 && h->ae_algo->ops->enable_vlan_filter) {
 599                 last_state = h->netdev_flags & HNAE3_VLAN_FLTR ? true : false;
 600                 if (enable != last_state) {
 601                         netdev_info(netdev,
 602                                     "%s vlan filter\n",
 603                                     enable ? "enable" : "disable");
 604                         h->ae_algo->ops->enable_vlan_filter(h, enable);
 605                 }
 606         }
 607 }
 608
 609 static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
 610                         u16 *mss, u32 *type_cs_vlan_tso)
 611 {
 612         u32 l4_offset, hdr_len;
 613         union l3_hdr_info l3;
 614         union l4_hdr_info l4;
 615         u32 l4_paylen;
 616         int ret;
 617
 618         if (!skb_is_gso(skb))
 619                 return 0;
 620
 621         ret = skb_cow_head(skb, 0);
 622         if (ret)
 623                 return ret;
 624
 625         l3.hdr = skb_network_header(skb);
 626         l4.hdr = skb_transport_header(skb);
 627
 628         /* Software should clear the IPv4's checksum field when tso is
 629          * needed.
 630          */
 631         if (l3.v4->version == 4)
 632                 l3.v4->check = 0;
 633
 634         /* tunnel packet.*/
 635         if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 636                                          SKB_GSO_GRE_CSUM |
 637                                          SKB_GSO_UDP_TUNNEL |
 638                                          SKB_GSO_UDP_TUNNEL_CSUM)) {
 639                 if ((!(skb_shinfo(skb)->gso_type &
 640                     SKB_GSO_PARTIAL)) &&
 641                     (skb_shinfo(skb)->gso_type &
 642                     SKB_GSO_UDP_TUNNEL_CSUM)) {
 643                         /* Software should clear the udp's checksum
 644                          * field when tso is needed.
 645                          */
 646                         l4.udp->check = 0;
 647                 }
 648                 /* reset l3&l4 pointers from outer to inner headers */
 649                 l3.hdr = skb_inner_network_header(skb);
 650                 l4.hdr = skb_inner_transport_header(skb);
 651
 652                 /* Software should clear the IPv4's checksum field when
 653                  * tso is needed.
 654                  */
 655                 if (l3.v4->version == 4)
 656                         l3.v4->check = 0;
 657         }
 658
 659         /* normal or tunnel packet*/
 660         l4_offset = l4.hdr - skb->data;
 661         hdr_len = (l4.tcp->doff << 2) + l4_offset;
 662
 663         /* remove payload length from inner pseudo checksum when tso*/
 664         l4_paylen = skb->len - l4_offset;
 665         csum_replace_by_diff(&l4.tcp->check,
 666                              (__force __wsum)htonl(l4_paylen));
 667
 668         /* find the txbd field values */
 669         *paylen = skb->len - hdr_len;
 670         hnae3_set_bit(*type_cs_vlan_tso,
 671                       HNS3_TXD_TSO_B, 1);
 672
 673         /* get MSS for TSO */
 674         *mss = skb_shinfo(skb)->gso_size;
 675
 676         return 0;
 677 }
 678
 679 static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 680                                 u8 *il4_proto)
 681 {
 682         union l3_hdr_info l3;
 683         unsigned char *l4_hdr;
 684         unsigned char *exthdr;
 685         u8 l4_proto_tmp;
 686         __be16 frag_off;
 687
 688         /* find outer header point */
 689         l3.hdr = skb_network_header(skb);
 690         l4_hdr = skb_transport_header(skb);
 691
 692         if (skb->protocol == htons(ETH_P_IPV6)) {
 693                 exthdr = l3.hdr + sizeof(*l3.v6);
 694                 l4_proto_tmp = l3.v6->nexthdr;
 695                 if (l4_hdr != exthdr)
 696                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 697                                          &l4_proto_tmp, &frag_off);
 698         } else if (skb->protocol == htons(ETH_P_IP)) {
 699                 l4_proto_tmp = l3.v4->protocol;
 700         } else {
 701                 return -EINVAL;
 702         }
 703
 704         *ol4_proto = l4_proto_tmp;
 705
 706         /* tunnel packet */
 707         if (!skb->encapsulation) {
 708                 *il4_proto = 0;
 709                 return 0;
 710         }
 711
 712         /* find inner header point */
 713         l3.hdr = skb_inner_network_header(skb);
 714         l4_hdr = skb_inner_transport_header(skb);
 715
 716         if (l3.v6->version == 6) {
 717                 exthdr = l3.hdr + sizeof(*l3.v6);
 718                 l4_proto_tmp = l3.v6->nexthdr;
 719                 if (l4_hdr != exthdr)
 720                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 721                                          &l4_proto_tmp, &frag_off);
 722         } else if (l3.v4->version == 4) {
 723                 l4_proto_tmp = l3.v4->protocol;
 724         }
 725
 726         *il4_proto = l4_proto_tmp;
 727
 728         return 0;
 729 }
 730
 731 static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
 732                                 u8 il4_proto, u32 *type_cs_vlan_tso,
 733                                 u32 *ol_type_vlan_len_msec)
 734 {
 735         union l3_hdr_info l3;
 736         union l4_hdr_info l4;
 737         unsigned char *l2_hdr;
 738         u8 l4_proto = ol4_proto;
 739         u32 ol2_len;
 740         u32 ol3_len;
 741         u32 ol4_len;
 742         u32 l2_len;
 743         u32 l3_len;
 744
 745         l3.hdr = skb_network_header(skb);
 746         l4.hdr = skb_transport_header(skb);
 747
 748         /* compute L2 header size for normal packet, defined in 2 Bytes */
 749         l2_len = l3.hdr - skb->data;
 750         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 751                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 752
 753         /* tunnel packet*/
 754         if (skb->encapsulation) {
 755                 /* compute OL2 header size, defined in 2 Bytes */
 756                 ol2_len = l2_len;
 757                 hnae3_set_field(*ol_type_vlan_len_msec,
 758                                 HNS3_TXD_L2LEN_M,
 759                                 HNS3_TXD_L2LEN_S, ol2_len >> 1);
 760
 761                 /* compute OL3 header size, defined in 4 Bytes */
 762                 ol3_len = l4.hdr - l3.hdr;
 763                 hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_M,
 764                                 HNS3_TXD_L3LEN_S, ol3_len >> 2);
 765
 766                 /* MAC in UDP, MAC in GRE (0x6558)*/
 767                 if ((ol4_proto == IPPROTO_UDP) || (ol4_proto == IPPROTO_GRE)) {
 768                         /* switch MAC header ptr from outer to inner header.*/
 769                         l2_hdr = skb_inner_mac_header(skb);
 770
 771                         /* compute OL4 header size, defined in 4 Bytes. */
 772                         ol4_len = l2_hdr - l4.hdr;
 773                         hnae3_set_field(*ol_type_vlan_len_msec,
 774                                         HNS3_TXD_L4LEN_M, HNS3_TXD_L4LEN_S,
 775                                         ol4_len >> 2);
 776
 777                         /* switch IP header ptr from outer to inner header */
 778                         l3.hdr = skb_inner_network_header(skb);
 779
 780                         /* compute inner l2 header size, defined in 2 Bytes. */
 781                         l2_len = l3.hdr - l2_hdr;
 782                         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 783                                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 784                 } else {
 785                         /* skb packet types not supported by hardware,
 786                          * txbd len fild doesn't be filled.
 787                          */
 788                         return;
 789                 }
 790
 791                 /* switch L4 header pointer from outer to inner */
 792                 l4.hdr = skb_inner_transport_header(skb);
 793
 794                 l4_proto = il4_proto;
 795         }
 796
 797         /* compute inner(/normal) L3 header size, defined in 4 Bytes */
 798         l3_len = l4.hdr - l3.hdr;
 799         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_M,
 800                         HNS3_TXD_L3LEN_S, l3_len >> 2);
 801
 802         /* compute inner(/normal) L4 header size, defined in 4 Bytes */
 803         switch (l4_proto) {
 804         case IPPROTO_TCP:
 805                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 806                                 HNS3_TXD_L4LEN_S, l4.tcp->doff);
 807                 break;
 808         case IPPROTO_SCTP:
 809                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 810                                 HNS3_TXD_L4LEN_S,
 811                                 (sizeof(struct sctphdr) >> 2));
 812                 break;
 813         case IPPROTO_UDP:
 814                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 815                                 HNS3_TXD_L4LEN_S,
 816                                 (sizeof(struct udphdr) >> 2));
 817                 break;
 818         default:
 819                 /* skb packet types not supported by hardware,
 820                  * txbd len fild doesn't be filled.
 821                  */
 822                 return;
 823         }
 824 }
 825
 826 /* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
 827  * and it is udp packet, which has a dest port as the IANA assigned.
 828  * the hardware is expected to do the checksum offload, but the
 829  * hardware will not do the checksum offload when udp dest port is
 830  * 4789.
 831  */
 832 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 833 {
 834 #define IANA_VXLAN_PORT 4789
 835         union l4_hdr_info l4;
 836
 837         l4.hdr = skb_transport_header(skb);
 838
 839         if (!(!skb->encapsulation && l4.udp->dest == htons(IANA_VXLAN_PORT)))
 840                 return false;
 841
 842         skb_checksum_help(skb);
 843
 844         return true;
 845 }
 846
 847 static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
 848                                    u8 il4_proto, u32 *type_cs_vlan_tso,
 849                                    u32 *ol_type_vlan_len_msec)
 850 {
 851         union l3_hdr_info l3;
 852         u32 l4_proto = ol4_proto;
 853
 854         l3.hdr = skb_network_header(skb);
 855
 856         /* define OL3 type and tunnel type(OL4).*/
 857         if (skb->encapsulation) {
 858                 /* define outer network header type.*/
 859                 if (skb->protocol == htons(ETH_P_IP)) {
 860                         if (skb_is_gso(skb))
 861                                 hnae3_set_field(*ol_type_vlan_len_msec,
 862                                                 HNS3_TXD_OL3T_M,
 863                                                 HNS3_TXD_OL3T_S,
 864                                                 HNS3_OL3T_IPV4_CSUM);
 865                         else
 866                                 hnae3_set_field(*ol_type_vlan_len_msec,
 867                                                 HNS3_TXD_OL3T_M,
 868                                                 HNS3_TXD_OL3T_S,
 869                                                 HNS3_OL3T_IPV4_NO_CSUM);
 870
 871                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
 872                         hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_M,
 873                                         HNS3_TXD_OL3T_S, HNS3_OL3T_IPV6);
 874                 }
 875
 876                 /* define tunnel type(OL4).*/
 877                 switch (l4_proto) {
 878                 case IPPROTO_UDP:
 879                         hnae3_set_field(*ol_type_vlan_len_msec,
 880                                         HNS3_TXD_TUNTYPE_M,
 881                                         HNS3_TXD_TUNTYPE_S,
 882                                         HNS3_TUN_MAC_IN_UDP);
 883                         break;
 884                 case IPPROTO_GRE:
 885                         hnae3_set_field(*ol_type_vlan_len_msec,
 886                                         HNS3_TXD_TUNTYPE_M,
 887                                         HNS3_TXD_TUNTYPE_S,
 888                                         HNS3_TUN_NVGRE);
 889                         break;
 890                 default:
 891                         /* drop the skb tunnel packet if hardware don't support,
 892                          * because hardware can't calculate csum when TSO.
 893                          */
 894                         if (skb_is_gso(skb))
 895                                 return -EDOM;
 896
 897                         /* the stack computes the IP header already,
 898                          * driver calculate l4 checksum when not TSO.
 899                          */
 900                         skb_checksum_help(skb);
 901                         return 0;
 902                 }
 903
 904                 l3.hdr = skb_inner_network_header(skb);
 905                 l4_proto = il4_proto;
 906         }
 907
 908         if (l3.v4->version == 4) {
 909                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 910                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV4);
 911
 912                 /* the stack computes the IP header already, the only time we
 913                  * need the hardware to recompute it is in the case of TSO.
 914                  */
 915                 if (skb_is_gso(skb))
 916                         hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
 917         } else if (l3.v6->version == 6) {
 918                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 919                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV6);
 920         }
 921
 922         switch (l4_proto) {
 923         case IPPROTO_TCP:
 924                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 925                 hnae3_set_field(*type_cs_vlan_tso,
 926                                 HNS3_TXD_L4T_M,
 927                                 HNS3_TXD_L4T_S,
 928                                 HNS3_L4T_TCP);
 929                 break;
 930         case IPPROTO_UDP:
 931                 if (hns3_tunnel_csum_bug(skb))
 932                         break;
 933
 934                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 935                 hnae3_set_field(*type_cs_vlan_tso,
 936                                 HNS3_TXD_L4T_M,
 937                                 HNS3_TXD_L4T_S,
 938                                 HNS3_L4T_UDP);
 939                 break;
 940         case IPPROTO_SCTP:
 941                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 942                 hnae3_set_field(*type_cs_vlan_tso,
 943                                 HNS3_TXD_L4T_M,
 944                                 HNS3_TXD_L4T_S,
 945                                 HNS3_L4T_SCTP);
 946                 break;
 947         default:
 948                 /* drop the skb tunnel packet if hardware don't support,
 949                  * because hardware can't calculate csum when TSO.
 950                  */
 951                 if (skb_is_gso(skb))
 952                         return -EDOM;
 953
 954                 /* the stack computes the IP header already,
 955                  * driver calculate l4 checksum when not TSO.
 956                  */
 957                 skb_checksum_help(skb);
 958                 return 0;
 959         }
 960
 961         return 0;
 962 }
 963
 964 static void hns3_set_txbd_baseinfo(u16 *bdtp_fe_sc_vld_ra_ri, int frag_end)
 965 {
 966         /* Config bd buffer end */
 967         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_BDTYPE_M,
 968                         HNS3_TXD_BDTYPE_S, 0);
 969         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_FE_B, !!frag_end);
 970         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_VLD_B, 1);
 971         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_SC_M, HNS3_TXD_SC_S, 0);
 972 }
 973
 974 static int hns3_fill_desc_vtags(struct sk_buff *skb,
 975                                 struct hns3_enet_ring *tx_ring,
 976                                 u32 *inner_vlan_flag,
 977                                 u32 *out_vlan_flag,
 978                                 u16 *inner_vtag,
 979                                 u16 *out_vtag)
 980 {
 981 #define HNS3_TX_VLAN_PRIO_SHIFT 13
 982
 983         if (skb->protocol == htons(ETH_P_8021Q) &&
 984             !(tx_ring->tqp->handle->kinfo.netdev->features &
 985             NETIF_F_HW_VLAN_CTAG_TX)) {
 986                 /* When HW VLAN acceleration is turned off, and the stack
 987                  * sets the protocol to 802.1q, the driver just need to
 988                  * set the protocol to the encapsulated ethertype.
 989                  */
 990                 skb->protocol = vlan_get_protocol(skb);
 991                 return 0;
 992         }
 993
 994         if (skb_vlan_tag_present(skb)) {
 995                 u16 vlan_tag;
 996
 997                 vlan_tag = skb_vlan_tag_get(skb);
 998                 vlan_tag |= (skb->priority & 0x7) << HNS3_TX_VLAN_PRIO_SHIFT;
 999
1000                 /* Based on hw strategy, use out_vtag in two layer tag case,
1001                  * and use inner_vtag in one tag case.
1002                  */
1003                 if (skb->protocol == htons(ETH_P_8021Q)) {
1004                         hnae3_set_bit(*out_vlan_flag, HNS3_TXD_OVLAN_B, 1);
1005                         *out_vtag = vlan_tag;
1006                 } else {
1007                         hnae3_set_bit(*inner_vlan_flag, HNS3_TXD_VLAN_B, 1);
1008                         *inner_vtag = vlan_tag;
1009                 }
1010         } else if (skb->protocol == htons(ETH_P_8021Q)) {
1011                 struct vlan_ethhdr *vhdr;
1012                 int rc;
1013
1014                 rc = skb_cow_head(skb, 0);
1015                 if (rc < 0)
1016                         return rc;
1017                 vhdr = (struct vlan_ethhdr *)skb->data;
1018                 vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority & 0x7)
1019                                         << HNS3_TX_VLAN_PRIO_SHIFT);
1020         }
1021
1022         skb->protocol = vlan_get_protocol(skb);
1023         return 0;
1024 }
1025
1026 static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
1027                           int size, int frag_end, enum hns_desc_type type)
1028 {
1029         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
1030         struct hns3_desc *desc = &ring->desc[ring->next_to_use];
1031         struct device *dev = ring_to_dev(ring);
1032         u32 ol_type_vlan_len_msec = 0;
1033         u16 bdtp_fe_sc_vld_ra_ri = 0;
1034         struct skb_frag_struct *frag;
1035         unsigned int frag_buf_num;
1036         u32 type_cs_vlan_tso = 0;
1037         struct sk_buff *skb;
1038         u16 inner_vtag = 0;
1039         u16 out_vtag = 0;
1040         unsigned int k;
1041         int sizeoflast;
1042         u32 paylen = 0;
1043         dma_addr_t dma;
1044         u16 mss = 0;
1045         u8 ol4_proto;
1046         u8 il4_proto;
1047         int ret;
1048
1049         if (type == DESC_TYPE_SKB) {
1050                 skb = (struct sk_buff *)priv;
1051                 paylen = skb->len;
1052
1053                 ret = hns3_fill_desc_vtags(skb, ring, &type_cs_vlan_tso,
1054                                            &ol_type_vlan_len_msec,
1055                                            &inner_vtag, &out_vtag);
1056                 if (unlikely(ret))
1057                         return ret;
1058
1059                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1060                         skb_reset_mac_len(skb);
1061
1062                         ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
1063                         if (ret)
1064                                 return ret;
1065                         hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
1066                                             &type_cs_vlan_tso,
1067                                             &ol_type_vlan_len_msec);
1068                         ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
1069                                                       &type_cs_vlan_tso,
1070                                                       &ol_type_vlan_len_msec);
1071                         if (ret)
1072                                 return ret;
1073
1074                         ret = hns3_set_tso(skb, &paylen, &mss,
1075                                            &type_cs_vlan_tso);
1076                         if (ret)
1077                                 return ret;
1078                 }
1079
1080                 /* Set txbd */
1081                 desc->tx.ol_type_vlan_len_msec =
1082                         cpu_to_le32(ol_type_vlan_len_msec);
1083                 desc->tx.type_cs_vlan_tso_len =
1084                         cpu_to_le32(type_cs_vlan_tso);
1085                 desc->tx.paylen = cpu_to_le32(paylen);
1086                 desc->tx.mss = cpu_to_le16(mss);
1087                 desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
1088                 desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
1089
1090                 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1091         } else {
1092                 frag = (struct skb_frag_struct *)priv;
1093                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1094         }
1095
1096         if (dma_mapping_error(ring->dev, dma)) {
1097                 ring->stats.sw_err_cnt++;
1098                 return -ENOMEM;
1099         }
1100
1101         desc_cb->length = size;
1102
1103         frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) >> HNS3_MAX_BD_SIZE_OFFSET;
1104         sizeoflast = size & HNS3_TX_LAST_SIZE_M;
1105         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1106
1107         /* When frag size is bigger than hardware limit, split this frag */
1108         for (k = 0; k < frag_buf_num; k++) {
1109                 /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
1110                 desc_cb->priv = priv;
1111                 desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k;
1112                 desc_cb->type = (type == DESC_TYPE_SKB && !k) ?
1113                                         DESC_TYPE_SKB : DESC_TYPE_PAGE;
1114
1115                 /* now, fill the descriptor */
1116                 desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
1117                 desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
1118                                 (u16)sizeoflast : (u16)HNS3_MAX_BD_SIZE);
1119                 hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri,
1120                                        frag_end && (k == frag_buf_num - 1) ?
1121                                                 1 : 0);
1122                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1123                                 cpu_to_le16(bdtp_fe_sc_vld_ra_ri);
1124
1125                 /* move ring pointer to next.*/
1126                 ring_ptr_move_fw(ring, next_to_use);
1127
1128                 desc_cb = &ring->desc_cb[ring->next_to_use];
1129                 desc = &ring->desc[ring->next_to_use];
1130         }
1131
1132         return 0;
1133 }
1134
1135 static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
1136                                    struct hns3_enet_ring *ring)
1137 {
1138         struct sk_buff *skb = *out_skb;
1139         struct sk_buff *new_skb = NULL;
1140         struct skb_frag_struct *frag;
1141         int bdnum_for_frag;
1142         int frag_num;
1143         int buf_num;
1144         int size;
1145         int i;
1146
1147         size = skb_headlen(skb);
1148         buf_num = (size + HNS3_MAX_BD_SIZE - 1) >> HNS3_MAX_BD_SIZE_OFFSET;
1149
1150         frag_num = skb_shinfo(skb)->nr_frags;
1151         for (i = 0; i < frag_num; i++) {
1152                 frag = &skb_shinfo(skb)->frags[i];
1153                 size = skb_frag_size(frag);
1154                 bdnum_for_frag = (size + HNS3_MAX_BD_SIZE - 1) >>
1155                                  HNS3_MAX_BD_SIZE_OFFSET;
1156                 if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
1157                         return -ENOMEM;
1158
1159                 buf_num += bdnum_for_frag;
1160         }
1161
1162         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1163                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) >>
1164                           HNS3_MAX_BD_SIZE_OFFSET;
1165                 if (ring_space(ring) < buf_num)
1166                         return -EBUSY;
1167                 /* manual split the send packet */
1168                 new_skb = skb_copy(skb, GFP_ATOMIC);
1169                 if (!new_skb)
1170                         return -ENOMEM;
1171                 dev_kfree_skb_any(skb);
1172                 *out_skb = new_skb;
1173         }
1174
1175         if (unlikely(ring_space(ring) < buf_num))
1176                 return -EBUSY;
1177
1178         *bnum = buf_num;
1179         return 0;
1180 }
1181
1182 static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
1183                                   struct hns3_enet_ring *ring)
1184 {
1185         struct sk_buff *skb = *out_skb;
1186         struct sk_buff *new_skb = NULL;
1187         int buf_num;
1188
1189         /* No. of segments (plus a header) */
1190         buf_num = skb_shinfo(skb)->nr_frags + 1;
1191
1192         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1193                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1194                 if (ring_space(ring) < buf_num)
1195                         return -EBUSY;
1196                 /* manual split the send packet */
1197                 new_skb = skb_copy(skb, GFP_ATOMIC);
1198                 if (!new_skb)
1199                         return -ENOMEM;
1200                 dev_kfree_skb_any(skb);
1201                 *out_skb = new_skb;
1202         }
1203
1204         if (unlikely(ring_space(ring) < buf_num))
1205                 return -EBUSY;
1206
1207         *bnum = buf_num;
1208
1209         return 0;
1210 }
1211
1212 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1213 {
1214         struct device *dev = ring_to_dev(ring);
1215         unsigned int i;
1216
1217         for (i = 0; i < ring->desc_num; i++) {
1218                 /* check if this is where we started */
1219                 if (ring->next_to_use == next_to_use_orig)
1220                         break;
1221
1222                 /* unmap the descriptor dma address */
1223                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1224                         dma_unmap_single(dev,
1225                                          ring->desc_cb[ring->next_to_use].dma,
1226                                         ring->desc_cb[ring->next_to_use].length,
1227                                         DMA_TO_DEVICE);
1228                 else if (ring->desc_cb[ring->next_to_use].length)
1229                         dma_unmap_page(dev,
1230                                        ring->desc_cb[ring->next_to_use].dma,
1231                                        ring->desc_cb[ring->next_to_use].length,
1232                                        DMA_TO_DEVICE);
1233
1234                 ring->desc_cb[ring->next_to_use].length = 0;
1235
1236                 /* rollback one */
1237                 ring_ptr_move_bw(ring, next_to_use);
1238         }
1239 }
1240
1241 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1242 {
1243         struct hns3_nic_priv *priv = netdev_priv(netdev);
1244         struct hns3_nic_ring_data *ring_data =
1245                 &tx_ring_data(priv, skb->queue_mapping);
1246         struct hns3_enet_ring *ring = ring_data->ring;
1247         struct netdev_queue *dev_queue;
1248         struct skb_frag_struct *frag;
1249         int next_to_use_head;
1250         int next_to_use_frag;
1251         int buf_num;
1252         int seg_num;
1253         int size;
1254         int ret;
1255         int i;
1256
1257         /* Prefetch the data used later */
1258         prefetch(skb->data);
1259
1260         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
1261         case -EBUSY:
1262                 u64_stats_update_begin(&ring->syncp);
1263                 ring->stats.tx_busy++;
1264                 u64_stats_update_end(&ring->syncp);
1265
1266                 goto out_net_tx_busy;
1267         case -ENOMEM:
1268                 u64_stats_update_begin(&ring->syncp);
1269                 ring->stats.sw_err_cnt++;
1270                 u64_stats_update_end(&ring->syncp);
1271                 netdev_err(netdev, "no memory to xmit!\n");
1272
1273                 goto out_err_tx_ok;
1274         default:
1275                 break;
1276         }
1277
1278         /* No. of segments (plus a header) */
1279         seg_num = skb_shinfo(skb)->nr_frags + 1;
1280         /* Fill the first part */
1281         size = skb_headlen(skb);
1282
1283         next_to_use_head = ring->next_to_use;
1284
1285         ret = priv->ops.fill_desc(ring, skb, size, seg_num == 1 ? 1 : 0,
1286                                   DESC_TYPE_SKB);
1287         if (ret)
1288                 goto head_fill_err;
1289
1290         next_to_use_frag = ring->next_to_use;
1291         /* Fill the fragments */
1292         for (i = 1; i < seg_num; i++) {
1293                 frag = &skb_shinfo(skb)->frags[i - 1];
1294                 size = skb_frag_size(frag);
1295
1296                 ret = priv->ops.fill_desc(ring, frag, size,
1297                                           seg_num - 1 == i ? 1 : 0,
1298                                           DESC_TYPE_PAGE);
1299
1300                 if (ret)
1301                         goto frag_fill_err;
1302         }
1303
1304         /* Complete translate all packets */
1305         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1306         netdev_tx_sent_queue(dev_queue, skb->len);
1307
1308         wmb(); /* Commit all data before submit */
1309
1310         hnae3_queue_xmit(ring->tqp, buf_num);
1311
1312         return NETDEV_TX_OK;
1313
1314 frag_fill_err:
1315         hns3_clear_desc(ring, next_to_use_frag);
1316
1317 head_fill_err:
1318         hns3_clear_desc(ring, next_to_use_head);
1319
1320 out_err_tx_ok:
1321         dev_kfree_skb_any(skb);
1322         return NETDEV_TX_OK;
1323
1324 out_net_tx_busy:
1325         netif_stop_subqueue(netdev, ring_data->queue_index);
1326         smp_mb(); /* Commit all data before submit */
1327
1328         return NETDEV_TX_BUSY;
1329 }
1330
1331 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1332 {
1333         struct hnae3_handle *h = hns3_get_handle(netdev);
1334         struct sockaddr *mac_addr = p;
1335         int ret;
1336
1337         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1338                 return -EADDRNOTAVAIL;
1339
1340         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1341                 netdev_info(netdev, "already using mac address %pM\n",
1342                             mac_addr->sa_data);
1343                 return 0;
1344         }
1345
1346         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1347         if (ret) {
1348                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1349                 return ret;
1350         }
1351
1352         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1353
1354         return 0;
1355 }
1356
1357 static int hns3_nic_do_ioctl(struct net_device *netdev,
1358                              struct ifreq *ifr, int cmd)
1359 {
1360         struct hnae3_handle *h = hns3_get_handle(netdev);
1361
1362         if (!netif_running(netdev))
1363                 return -EINVAL;
1364
1365         if (!h->ae_algo->ops->do_ioctl)
1366                 return -EOPNOTSUPP;
1367
1368         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1369 }
1370
1371 static int hns3_nic_set_features(struct net_device *netdev,
1372                                  netdev_features_t features)
1373 {
1374         netdev_features_t changed = netdev->features ^ features;
1375         struct hns3_nic_priv *priv = netdev_priv(netdev);
1376         struct hnae3_handle *h = priv->ae_handle;
1377         bool enable;
1378         int ret;
1379
1380         if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1381                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1382                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
1383                 else
1384                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
1385         }
1386
1387         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1388                 enable = !!(features & NETIF_F_GRO_HW);
1389                 ret = h->ae_algo->ops->set_gro_en(h, enable);
1390                 if (ret)
1391                         return ret;
1392         }
1393
1394         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1395             h->ae_algo->ops->enable_vlan_filter) {
1396                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_FILTER);
1397                 h->ae_algo->ops->enable_vlan_filter(h, enable);
1398         }
1399
1400         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1401             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1402                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
1403                 ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, enable);
1404                 if (ret)
1405                         return ret;
1406         }
1407
1408         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1409                 enable = !!(features & NETIF_F_NTUPLE);
1410                 h->ae_algo->ops->enable_fd(h, enable);
1411         }
1412
1413         netdev->features = features;
1414         return 0;
1415 }
1416
1417 static void hns3_nic_get_stats64(struct net_device *netdev,
1418                                  struct rtnl_link_stats64 *stats)
1419 {
1420         struct hns3_nic_priv *priv = netdev_priv(netdev);
1421         int queue_num = priv->ae_handle->kinfo.num_tqps;
1422         struct hnae3_handle *handle = priv->ae_handle;
1423         struct hns3_enet_ring *ring;
1424         u64 rx_length_errors = 0;
1425         u64 rx_crc_errors = 0;
1426         u64 rx_multicast = 0;
1427         unsigned int start;
1428         u64 tx_errors = 0;
1429         u64 rx_errors = 0;
1430         unsigned int idx;
1431         u64 tx_bytes = 0;
1432         u64 rx_bytes = 0;
1433         u64 tx_pkts = 0;
1434         u64 rx_pkts = 0;
1435         u64 tx_drop = 0;
1436         u64 rx_drop = 0;
1437
1438         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1439                 return;
1440
1441         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1442
1443         for (idx = 0; idx < queue_num; idx++) {
1444                 /* fetch the tx stats */
1445                 ring = priv->ring_data[idx].ring;
1446                 do {
1447                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1448                         tx_bytes += ring->stats.tx_bytes;
1449                         tx_pkts += ring->stats.tx_pkts;
1450                         tx_drop += ring->stats.sw_err_cnt;
1451                         tx_errors += ring->stats.sw_err_cnt;
1452                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1453
1454                 /* fetch the rx stats */
1455                 ring = priv->ring_data[idx + queue_num].ring;
1456                 do {
1457                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1458                         rx_bytes += ring->stats.rx_bytes;
1459                         rx_pkts += ring->stats.rx_pkts;
1460                         rx_drop += ring->stats.non_vld_descs;
1461                         rx_drop += ring->stats.l2_err;
1462                         rx_errors += ring->stats.non_vld_descs;
1463                         rx_errors += ring->stats.l2_err;
1464                         rx_crc_errors += ring->stats.l2_err;
1465                         rx_crc_errors += ring->stats.l3l4_csum_err;
1466                         rx_multicast += ring->stats.rx_multicast;
1467                         rx_length_errors += ring->stats.err_pkt_len;
1468                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1469         }
1470
1471         stats->tx_bytes = tx_bytes;
1472         stats->tx_packets = tx_pkts;
1473         stats->rx_bytes = rx_bytes;
1474         stats->rx_packets = rx_pkts;
1475
1476         stats->rx_errors = rx_errors;
1477         stats->multicast = rx_multicast;
1478         stats->rx_length_errors = rx_length_errors;
1479         stats->rx_crc_errors = rx_crc_errors;
1480         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1481
1482         stats->tx_errors = tx_errors;
1483         stats->rx_dropped = rx_drop;
1484         stats->tx_dropped = tx_drop;
1485         stats->collisions = netdev->stats.collisions;
1486         stats->rx_over_errors = netdev->stats.rx_over_errors;
1487         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1488         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1489         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1490         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1491         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1492         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1493         stats->tx_window_errors = netdev->stats.tx_window_errors;
1494         stats->rx_compressed = netdev->stats.rx_compressed;
1495         stats->tx_compressed = netdev->stats.tx_compressed;
1496 }
1497
1498 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1499 {
1500         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1501         struct hnae3_handle *h = hns3_get_handle(netdev);
1502         struct hnae3_knic_private_info *kinfo = &h->kinfo;
1503         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1504         u8 tc = mqprio_qopt->qopt.num_tc;
1505         u16 mode = mqprio_qopt->mode;
1506         u8 hw = mqprio_qopt->qopt.hw;
1507
1508         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1509                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1510                 return -EOPNOTSUPP;
1511
1512         if (tc > HNAE3_MAX_TC)
1513                 return -EINVAL;
1514
1515         if (!netdev)
1516                 return -EINVAL;
1517
1518         return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1519                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1520 }
1521
1522 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1523                              void *type_data)
1524 {
1525         if (type != TC_SETUP_QDISC_MQPRIO)
1526                 return -EOPNOTSUPP;
1527
1528         return hns3_setup_tc(dev, type_data);
1529 }
1530
1531 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1532                                 __be16 proto, u16 vid)
1533 {
1534         struct hnae3_handle *h = hns3_get_handle(netdev);
1535         struct hns3_nic_priv *priv = netdev_priv(netdev);
1536         int ret = -EIO;
1537
1538         if (h->ae_algo->ops->set_vlan_filter)
1539                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1540
1541         if (!ret)
1542                 set_bit(vid, priv->active_vlans);
1543
1544         return ret;
1545 }
1546
1547 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1548                                  __be16 proto, u16 vid)
1549 {
1550         struct hnae3_handle *h = hns3_get_handle(netdev);
1551         struct hns3_nic_priv *priv = netdev_priv(netdev);
1552         int ret = -EIO;
1553
1554         if (h->ae_algo->ops->set_vlan_filter)
1555                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1556
1557         if (!ret)
1558                 clear_bit(vid, priv->active_vlans);
1559
1560         return ret;
1561 }
1562
1563 static int hns3_restore_vlan(struct net_device *netdev)
1564 {
1565         struct hns3_nic_priv *priv = netdev_priv(netdev);
1566         int ret = 0;
1567         u16 vid;
1568
1569         for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
1570                 ret = hns3_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
1571                 if (ret) {
1572                         netdev_err(netdev, "Restore vlan: %d filter, ret:%d\n",
1573                                    vid, ret);
1574                         return ret;
1575                 }
1576         }
1577
1578         return ret;
1579 }
1580
1581 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1582                                 u8 qos, __be16 vlan_proto)
1583 {
1584         struct hnae3_handle *h = hns3_get_handle(netdev);
1585         int ret = -EIO;
1586
1587         if (h->ae_algo->ops->set_vf_vlan_filter)
1588                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1589                                                    qos, vlan_proto);
1590
1591         return ret;
1592 }
1593
1594 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1595 {
1596         struct hnae3_handle *h = hns3_get_handle(netdev);
1597         int ret;
1598
1599         if (!h->ae_algo->ops->set_mtu)
1600                 return -EOPNOTSUPP;
1601
1602         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1603         if (ret)
1604                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1605                            ret);
1606         else
1607                 netdev->mtu = new_mtu;
1608
1609         return ret;
1610 }
1611
1612 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1613 {
1614         struct hns3_nic_priv *priv = netdev_priv(ndev);
1615         struct hns3_enet_ring *tx_ring = NULL;
1616         int timeout_queue = 0;
1617         int hw_head, hw_tail;
1618         int i;
1619
1620         /* Find the stopped queue the same way the stack does */
1621         for (i = 0; i < ndev->real_num_tx_queues; i++) {
1622                 struct netdev_queue *q;
1623                 unsigned long trans_start;
1624
1625                 q = netdev_get_tx_queue(ndev, i);
1626                 trans_start = q->trans_start;
1627                 if (netif_xmit_stopped(q) &&
1628                     time_after(jiffies,
1629                                (trans_start + ndev->watchdog_timeo))) {
1630                         timeout_queue = i;
1631                         break;
1632                 }
1633         }
1634
1635         if (i == ndev->num_tx_queues) {
1636                 netdev_info(ndev,
1637                             "no netdev TX timeout queue found, timeout count: %llu\n",
1638                             priv->tx_timeout_count);
1639                 return false;
1640         }
1641
1642         tx_ring = priv->ring_data[timeout_queue].ring;
1643
1644         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1645                                 HNS3_RING_TX_RING_HEAD_REG);
1646         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1647                                 HNS3_RING_TX_RING_TAIL_REG);
1648         netdev_info(ndev,
1649                     "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",
1650                     priv->tx_timeout_count,
1651                     timeout_queue,
1652                     tx_ring->next_to_use,
1653                     tx_ring->next_to_clean,
1654                     hw_head,
1655                     hw_tail,
1656                     readl(tx_ring->tqp_vector->mask_addr));
1657
1658         return true;
1659 }
1660
1661 static void hns3_nic_net_timeout(struct net_device *ndev)
1662 {
1663         struct hns3_nic_priv *priv = netdev_priv(ndev);
1664         struct hnae3_handle *h = priv->ae_handle;
1665
1666         if (!hns3_get_tx_timeo_queue_info(ndev))
1667                 return;
1668
1669         priv->tx_timeout_count++;
1670
1671         /* request the reset, and let the hclge to determine
1672          * which reset level should be done
1673          */
1674         if (h->ae_algo->ops->reset_event)
1675                 h->ae_algo->ops->reset_event(h->pdev, h);
1676 }
1677
1678 static const struct net_device_ops hns3_nic_netdev_ops = {
1679         .ndo_open               = hns3_nic_net_open,
1680         .ndo_stop               = hns3_nic_net_stop,
1681         .ndo_start_xmit         = hns3_nic_net_xmit,
1682         .ndo_tx_timeout         = hns3_nic_net_timeout,
1683         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1684         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1685         .ndo_change_mtu         = hns3_nic_change_mtu,
1686         .ndo_set_features       = hns3_nic_set_features,
1687         .ndo_get_stats64        = hns3_nic_get_stats64,
1688         .ndo_setup_tc           = hns3_nic_setup_tc,
1689         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1690         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1691         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1692         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1693 };
1694
1695 static bool hns3_is_phys_func(struct pci_dev *pdev)
1696 {
1697         u32 dev_id = pdev->device;
1698
1699         switch (dev_id) {
1700         case HNAE3_DEV_ID_GE:
1701         case HNAE3_DEV_ID_25GE:
1702         case HNAE3_DEV_ID_25GE_RDMA:
1703         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1704         case HNAE3_DEV_ID_50GE_RDMA:
1705         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1706         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1707                 return true;
1708         case HNAE3_DEV_ID_100G_VF:
1709         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
1710                 return false;
1711         default:
1712                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
1713                          dev_id);
1714         }
1715
1716         return false;
1717 }
1718
1719 static void hns3_disable_sriov(struct pci_dev *pdev)
1720 {
1721         /* If our VFs are assigned we cannot shut down SR-IOV
1722          * without causing issues, so just leave the hardware
1723          * available but disabled
1724          */
1725         if (pci_vfs_assigned(pdev)) {
1726                 dev_warn(&pdev->dev,
1727                          "disabling driver while VFs are assigned\n");
1728                 return;
1729         }
1730
1731         pci_disable_sriov(pdev);
1732 }
1733
1734 static void hns3_get_dev_capability(struct pci_dev *pdev,
1735                                     struct hnae3_ae_dev *ae_dev)
1736 {
1737         if (pdev->revision >= 0x21) {
1738                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
1739                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
1740         }
1741 }
1742
1743 /* hns3_probe - Device initialization routine
1744  * @pdev: PCI device information struct
1745  * @ent: entry in hns3_pci_tbl
1746  *
1747  * hns3_probe initializes a PF identified by a pci_dev structure.
1748  * The OS initialization, configuring of the PF private structure,
1749  * and a hardware reset occur.
1750  *
1751  * Returns 0 on success, negative on failure
1752  */
1753 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1754 {
1755         struct hnae3_ae_dev *ae_dev;
1756         int ret;
1757
1758         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
1759                               GFP_KERNEL);
1760         if (!ae_dev) {
1761                 ret = -ENOMEM;
1762                 return ret;
1763         }
1764
1765         ae_dev->pdev = pdev;
1766         ae_dev->flag = ent->driver_data;
1767         ae_dev->dev_type = HNAE3_DEV_KNIC;
1768         ae_dev->reset_type = HNAE3_NONE_RESET;
1769         hns3_get_dev_capability(pdev, ae_dev);
1770         pci_set_drvdata(pdev, ae_dev);
1771
1772         ret = hnae3_register_ae_dev(ae_dev);
1773         if (ret) {
1774                 devm_kfree(&pdev->dev, ae_dev);
1775                 pci_set_drvdata(pdev, NULL);
1776         }
1777
1778         return ret;
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_GRO_HW;
1958                 netdev->features |= NETIF_F_GRO_HW;
1959
1960                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
1961                         netdev->hw_features |= NETIF_F_NTUPLE;
1962                         netdev->features |= NETIF_F_NTUPLE;
1963                 }
1964         }
1965 }
1966
1967 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
1968                              struct hns3_desc_cb *cb)
1969 {
1970         unsigned int order = hnae3_page_order(ring);
1971         struct page *p;
1972
1973         p = dev_alloc_pages(order);
1974         if (!p)
1975                 return -ENOMEM;
1976
1977         cb->priv = p;
1978         cb->page_offset = 0;
1979         cb->reuse_flag = 0;
1980         cb->buf  = page_address(p);
1981         cb->length = hnae3_page_size(ring);
1982         cb->type = DESC_TYPE_PAGE;
1983
1984         return 0;
1985 }
1986
1987 static void hns3_free_buffer(struct hns3_enet_ring *ring,
1988                              struct hns3_desc_cb *cb)
1989 {
1990         if (cb->type == DESC_TYPE_SKB)
1991                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
1992         else if (!HNAE3_IS_TX_RING(ring))
1993                 put_page((struct page *)cb->priv);
1994         memset(cb, 0, sizeof(*cb));
1995 }
1996
1997 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
1998 {
1999         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
2000                                cb->length, ring_to_dma_dir(ring));
2001
2002         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
2003                 return -EIO;
2004
2005         return 0;
2006 }
2007
2008 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
2009                               struct hns3_desc_cb *cb)
2010 {
2011         if (cb->type == DESC_TYPE_SKB)
2012                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
2013                                  ring_to_dma_dir(ring));
2014         else if (cb->length)
2015                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
2016                                ring_to_dma_dir(ring));
2017 }
2018
2019 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2020 {
2021         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2022         ring->desc[i].addr = 0;
2023 }
2024
2025 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2026 {
2027         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2028
2029         if (!ring->desc_cb[i].dma)
2030                 return;
2031
2032         hns3_buffer_detach(ring, i);
2033         hns3_free_buffer(ring, cb);
2034 }
2035
2036 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2037 {
2038         int i;
2039
2040         for (i = 0; i < ring->desc_num; i++)
2041                 hns3_free_buffer_detach(ring, i);
2042 }
2043
2044 /* free desc along with its attached buffer */
2045 static void hns3_free_desc(struct hns3_enet_ring *ring)
2046 {
2047         int size = ring->desc_num * sizeof(ring->desc[0]);
2048
2049         hns3_free_buffers(ring);
2050
2051         if (ring->desc) {
2052                 dma_free_coherent(ring_to_dev(ring), size,
2053                                   ring->desc, ring->desc_dma_addr);
2054                 ring->desc = NULL;
2055         }
2056 }
2057
2058 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2059 {
2060         int size = ring->desc_num * sizeof(ring->desc[0]);
2061
2062         ring->desc = dma_alloc_coherent(ring_to_dev(ring), size,
2063                                         &ring->desc_dma_addr, GFP_KERNEL);
2064         if (!ring->desc)
2065                 return -ENOMEM;
2066
2067         return 0;
2068 }
2069
2070 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2071                                    struct hns3_desc_cb *cb)
2072 {
2073         int ret;
2074
2075         ret = hns3_alloc_buffer(ring, cb);
2076         if (ret)
2077                 goto out;
2078
2079         ret = hns3_map_buffer(ring, cb);
2080         if (ret)
2081                 goto out_with_buf;
2082
2083         return 0;
2084
2085 out_with_buf:
2086         hns3_free_buffer(ring, cb);
2087 out:
2088         return ret;
2089 }
2090
2091 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2092 {
2093         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2094
2095         if (ret)
2096                 return ret;
2097
2098         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2099
2100         return 0;
2101 }
2102
2103 /* Allocate memory for raw pkg, and map with dma */
2104 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2105 {
2106         int i, j, ret;
2107
2108         for (i = 0; i < ring->desc_num; i++) {
2109                 ret = hns3_alloc_buffer_attach(ring, i);
2110                 if (ret)
2111                         goto out_buffer_fail;
2112         }
2113
2114         return 0;
2115
2116 out_buffer_fail:
2117         for (j = i - 1; j >= 0; j--)
2118                 hns3_free_buffer_detach(ring, j);
2119         return ret;
2120 }
2121
2122 /* detach a in-used buffer and replace with a reserved one  */
2123 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2124                                 struct hns3_desc_cb *res_cb)
2125 {
2126         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2127         ring->desc_cb[i] = *res_cb;
2128         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2129         ring->desc[i].rx.bd_base_info = 0;
2130 }
2131
2132 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2133 {
2134         ring->desc_cb[i].reuse_flag = 0;
2135         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
2136                 + ring->desc_cb[i].page_offset);
2137         ring->desc[i].rx.bd_base_info = 0;
2138 }
2139
2140 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
2141                                       int *pkts)
2142 {
2143         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2144
2145         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2146         (*bytes) += desc_cb->length;
2147         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
2148         hns3_free_buffer_detach(ring, ring->next_to_clean);
2149
2150         ring_ptr_move_fw(ring, next_to_clean);
2151 }
2152
2153 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2154 {
2155         int u = ring->next_to_use;
2156         int c = ring->next_to_clean;
2157
2158         if (unlikely(h > ring->desc_num))
2159                 return 0;
2160
2161         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2162 }
2163
2164 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2165 {
2166         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2167         struct hns3_nic_priv *priv = netdev_priv(netdev);
2168         struct netdev_queue *dev_queue;
2169         int bytes, pkts;
2170         int head;
2171
2172         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2173         rmb(); /* Make sure head is ready before touch any data */
2174
2175         if (is_ring_empty(ring) || head == ring->next_to_clean)
2176                 return; /* no data to poll */
2177
2178         if (unlikely(!is_valid_clean_head(ring, head))) {
2179                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2180                            ring->next_to_use, ring->next_to_clean);
2181
2182                 u64_stats_update_begin(&ring->syncp);
2183                 ring->stats.io_err_cnt++;
2184                 u64_stats_update_end(&ring->syncp);
2185                 return;
2186         }
2187
2188         bytes = 0;
2189         pkts = 0;
2190         while (head != ring->next_to_clean) {
2191                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2192                 /* Issue prefetch for next Tx descriptor */
2193                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2194         }
2195
2196         ring->tqp_vector->tx_group.total_bytes += bytes;
2197         ring->tqp_vector->tx_group.total_packets += pkts;
2198
2199         u64_stats_update_begin(&ring->syncp);
2200         ring->stats.tx_bytes += bytes;
2201         ring->stats.tx_pkts += pkts;
2202         u64_stats_update_end(&ring->syncp);
2203
2204         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2205         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2206
2207         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2208                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2209                 /* Make sure that anybody stopping the queue after this
2210                  * sees the new next_to_clean.
2211                  */
2212                 smp_mb();
2213                 if (netif_tx_queue_stopped(dev_queue) &&
2214                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2215                         netif_tx_wake_queue(dev_queue);
2216                         ring->stats.restart_queue++;
2217                 }
2218         }
2219 }
2220
2221 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2222 {
2223         int ntc = ring->next_to_clean;
2224         int ntu = ring->next_to_use;
2225
2226         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2227 }
2228
2229 static void
2230 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2231 {
2232         struct hns3_desc_cb *desc_cb;
2233         struct hns3_desc_cb res_cbs;
2234         int i, ret;
2235
2236         for (i = 0; i < cleand_count; i++) {
2237                 desc_cb = &ring->desc_cb[ring->next_to_use];
2238                 if (desc_cb->reuse_flag) {
2239                         u64_stats_update_begin(&ring->syncp);
2240                         ring->stats.reuse_pg_cnt++;
2241                         u64_stats_update_end(&ring->syncp);
2242
2243                         hns3_reuse_buffer(ring, ring->next_to_use);
2244                 } else {
2245                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2246                         if (ret) {
2247                                 u64_stats_update_begin(&ring->syncp);
2248                                 ring->stats.sw_err_cnt++;
2249                                 u64_stats_update_end(&ring->syncp);
2250
2251                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2252                                            "hnae reserve buffer map failed.\n");
2253                                 break;
2254                         }
2255                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2256                 }
2257
2258                 ring_ptr_move_fw(ring, next_to_use);
2259         }
2260
2261         wmb(); /* Make all data has been write before submit */
2262         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2263 }
2264
2265 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2266                                 struct hns3_enet_ring *ring, int pull_len,
2267                                 struct hns3_desc_cb *desc_cb)
2268 {
2269         struct hns3_desc *desc;
2270         u32 truesize;
2271         int size;
2272         int last_offset;
2273         bool twobufs;
2274
2275         twobufs = ((PAGE_SIZE < 8192) &&
2276                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2277
2278         desc = &ring->desc[ring->next_to_clean];
2279         size = le16_to_cpu(desc->rx.size);
2280
2281         truesize = hnae3_buf_size(ring);
2282
2283         if (!twobufs)
2284                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2285
2286         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2287                         size - pull_len, truesize);
2288
2289          /* Avoid re-using remote pages,flag default unreuse */
2290         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2291                 return;
2292
2293         if (twobufs) {
2294                 /* If we are only owner of page we can reuse it */
2295                 if (likely(page_count(desc_cb->priv) == 1)) {
2296                         /* Flip page offset to other buffer */
2297                         desc_cb->page_offset ^= truesize;
2298
2299                         desc_cb->reuse_flag = 1;
2300                         /* bump ref count on page before it is given*/
2301                         get_page(desc_cb->priv);
2302                 }
2303                 return;
2304         }
2305
2306         /* Move offset up to the next cache line */
2307         desc_cb->page_offset += truesize;
2308
2309         if (desc_cb->page_offset <= last_offset) {
2310                 desc_cb->reuse_flag = 1;
2311                 /* Bump ref count on page before it is given*/
2312                 get_page(desc_cb->priv);
2313         }
2314 }
2315
2316 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2317                              struct hns3_desc *desc)
2318 {
2319         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2320         int l3_type, l4_type;
2321         u32 bd_base_info;
2322         int ol4_type;
2323         u32 l234info;
2324
2325         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2326         l234info = le32_to_cpu(desc->rx.l234_info);
2327
2328         skb->ip_summed = CHECKSUM_NONE;
2329
2330         skb_checksum_none_assert(skb);
2331
2332         if (!(netdev->features & NETIF_F_RXCSUM))
2333                 return;
2334
2335         /* We MUST enable hardware checksum before enabling hardware GRO */
2336         if (skb_shinfo(skb)->gso_size) {
2337                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2338                 return;
2339         }
2340
2341         /* check if hardware has done checksum */
2342         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2343                 return;
2344
2345         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2346                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2347                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2348                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2349                 u64_stats_update_begin(&ring->syncp);
2350                 ring->stats.l3l4_csum_err++;
2351                 u64_stats_update_end(&ring->syncp);
2352
2353                 return;
2354         }
2355
2356         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2357                                   HNS3_RXD_L3ID_S);
2358         l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2359                                   HNS3_RXD_L4ID_S);
2360
2361         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2362                                    HNS3_RXD_OL4ID_S);
2363         switch (ol4_type) {
2364         case HNS3_OL4_TYPE_MAC_IN_UDP:
2365         case HNS3_OL4_TYPE_NVGRE:
2366                 skb->csum_level = 1;
2367                 /* fall through */
2368         case HNS3_OL4_TYPE_NO_TUN:
2369                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2370                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2371                      l3_type == HNS3_L3_TYPE_IPV6) &&
2372                     (l4_type == HNS3_L4_TYPE_UDP ||
2373                      l4_type == HNS3_L4_TYPE_TCP ||
2374                      l4_type == HNS3_L4_TYPE_SCTP))
2375                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2376                 break;
2377         default:
2378                 break;
2379         }
2380 }
2381
2382 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2383 {
2384         if (skb_has_frag_list(skb))
2385                 napi_gro_flush(&ring->tqp_vector->napi, false);
2386
2387         napi_gro_receive(&ring->tqp_vector->napi, skb);
2388 }
2389
2390 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2391                                 struct hns3_desc *desc, u32 l234info,
2392                                 u16 *vlan_tag)
2393 {
2394         struct pci_dev *pdev = ring->tqp->handle->pdev;
2395
2396         if (pdev->revision == 0x20) {
2397                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2398                 if (!(*vlan_tag & VLAN_VID_MASK))
2399                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2400
2401                 return (*vlan_tag != 0);
2402         }
2403
2404 #define HNS3_STRP_OUTER_VLAN    0x1
2405 #define HNS3_STRP_INNER_VLAN    0x2
2406
2407         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2408                                 HNS3_RXD_STRP_TAGP_S)) {
2409         case HNS3_STRP_OUTER_VLAN:
2410                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2411                 return true;
2412         case HNS3_STRP_INNER_VLAN:
2413                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2414                 return true;
2415         default:
2416                 return false;
2417         }
2418 }
2419
2420 static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
2421                           unsigned char *va)
2422 {
2423 #define HNS3_NEED_ADD_FRAG      1
2424         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2425         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2426         struct sk_buff *skb;
2427
2428         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2429         skb = ring->skb;
2430         if (unlikely(!skb)) {
2431                 netdev_err(netdev, "alloc rx skb fail\n");
2432
2433                 u64_stats_update_begin(&ring->syncp);
2434                 ring->stats.sw_err_cnt++;
2435                 u64_stats_update_end(&ring->syncp);
2436
2437                 return -ENOMEM;
2438         }
2439
2440         prefetchw(skb->data);
2441
2442         ring->pending_buf = 1;
2443         ring->frag_num = 0;
2444         ring->tail_skb = NULL;
2445         if (length <= HNS3_RX_HEAD_SIZE) {
2446                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2447
2448                 /* We can reuse buffer as-is, just make sure it is local */
2449                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2450                         desc_cb->reuse_flag = 1;
2451                 else /* This page cannot be reused so discard it */
2452                         put_page(desc_cb->priv);
2453
2454                 ring_ptr_move_fw(ring, next_to_clean);
2455                 return 0;
2456         }
2457         u64_stats_update_begin(&ring->syncp);
2458         ring->stats.seg_pkt_cnt++;
2459         u64_stats_update_end(&ring->syncp);
2460
2461         ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2462         __skb_put(skb, ring->pull_len);
2463         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2464                             desc_cb);
2465         ring_ptr_move_fw(ring, next_to_clean);
2466
2467         return HNS3_NEED_ADD_FRAG;
2468 }
2469
2470 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2471                          struct sk_buff **out_skb, bool pending)
2472 {
2473         struct sk_buff *skb = *out_skb;
2474         struct sk_buff *head_skb = *out_skb;
2475         struct sk_buff *new_skb;
2476         struct hns3_desc_cb *desc_cb;
2477         struct hns3_desc *pre_desc;
2478         u32 bd_base_info;
2479         int pre_bd;
2480
2481         /* if there is pending bd, the SW param next_to_clean has moved
2482          * to next and the next is NULL
2483          */
2484         if (pending) {
2485                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2486                         ring->desc_num;
2487                 pre_desc = &ring->desc[pre_bd];
2488                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2489         } else {
2490                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2491         }
2492
2493         while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2494                 desc = &ring->desc[ring->next_to_clean];
2495                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2496                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2497                 if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
2498                         return -ENXIO;
2499
2500                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2501                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2502                                                  HNS3_RX_HEAD_SIZE);
2503                         if (unlikely(!new_skb)) {
2504                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2505                                            "alloc rx skb frag fail\n");
2506                                 return -ENXIO;
2507                         }
2508                         ring->frag_num = 0;
2509
2510                         if (ring->tail_skb) {
2511                                 ring->tail_skb->next = new_skb;
2512                                 ring->tail_skb = new_skb;
2513                         } else {
2514                                 skb_shinfo(skb)->frag_list = new_skb;
2515                                 ring->tail_skb = new_skb;
2516                         }
2517                 }
2518
2519                 if (ring->tail_skb) {
2520                         head_skb->truesize += hnae3_buf_size(ring);
2521                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2522                         head_skb->len += le16_to_cpu(desc->rx.size);
2523                         skb = ring->tail_skb;
2524                 }
2525
2526                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2527                 ring_ptr_move_fw(ring, next_to_clean);
2528                 ring->pending_buf++;
2529         }
2530
2531         return 0;
2532 }
2533
2534 static void hns3_set_gro_param(struct sk_buff *skb, u32 l234info,
2535                                u32 bd_base_info)
2536 {
2537         u16 gro_count;
2538         u32 l3_type;
2539
2540         gro_count = hnae3_get_field(l234info, HNS3_RXD_GRO_COUNT_M,
2541                                     HNS3_RXD_GRO_COUNT_S);
2542         /* if there is no HW GRO, do not set gro params */
2543         if (!gro_count)
2544                 return;
2545
2546         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
2547          * to skb_shinfo(skb)->gso_segs
2548          */
2549         NAPI_GRO_CB(skb)->count = gro_count;
2550
2551         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2552                                   HNS3_RXD_L3ID_S);
2553         if (l3_type == HNS3_L3_TYPE_IPV4)
2554                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2555         else if (l3_type == HNS3_L3_TYPE_IPV6)
2556                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2557         else
2558                 return;
2559
2560         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2561                                                     HNS3_RXD_GRO_SIZE_M,
2562                                                     HNS3_RXD_GRO_SIZE_S);
2563         if (skb_shinfo(skb)->gso_size)
2564                 tcp_gro_complete(skb);
2565 }
2566
2567 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2568                                      struct sk_buff *skb)
2569 {
2570         struct hnae3_handle *handle = ring->tqp->handle;
2571         enum pkt_hash_types rss_type;
2572         struct hns3_desc *desc;
2573         int last_bd;
2574
2575         /* When driver handle the rss type, ring->next_to_clean indicates the
2576          * first descriptor of next packet, need -1 here.
2577          */
2578         last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
2579         desc = &ring->desc[last_bd];
2580
2581         if (le32_to_cpu(desc->rx.rss_hash))
2582                 rss_type = handle->kinfo.rss_type;
2583         else
2584                 rss_type = PKT_HASH_TYPE_NONE;
2585
2586         skb_set_hash(skb, le32_to_cpu(desc->rx.rss_hash), rss_type);
2587 }
2588
2589 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2590                              struct sk_buff **out_skb)
2591 {
2592         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2593         enum hns3_pkt_l2t_type l2_frame_type;
2594         struct sk_buff *skb = ring->skb;
2595         struct hns3_desc_cb *desc_cb;
2596         struct hns3_desc *desc;
2597         u32 bd_base_info;
2598         u32 l234info;
2599         int length;
2600         int ret;
2601
2602         desc = &ring->desc[ring->next_to_clean];
2603         desc_cb = &ring->desc_cb[ring->next_to_clean];
2604
2605         prefetch(desc);
2606
2607         length = le16_to_cpu(desc->rx.size);
2608         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2609
2610         /* Check valid BD */
2611         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2612                 return -ENXIO;
2613
2614         if (!skb)
2615                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2616
2617         /* Prefetch first cache line of first page
2618          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2619          * line size is 64B so need to prefetch twice to make it 128B. But in
2620          * actual we can have greater size of caches with 128B Level 1 cache
2621          * lines. In such a case, single fetch would suffice to cache in the
2622          * relevant part of the header.
2623          */
2624         prefetch(ring->va);
2625 #if L1_CACHE_BYTES < 128
2626         prefetch(ring->va + L1_CACHE_BYTES);
2627 #endif
2628
2629         if (!skb) {
2630                 ret = hns3_alloc_skb(ring, length, ring->va);
2631                 *out_skb = skb = ring->skb;
2632
2633                 if (ret < 0) /* alloc buffer fail */
2634                         return ret;
2635                 if (ret > 0) { /* need add frag */
2636                         ret = hns3_add_frag(ring, desc, &skb, false);
2637                         if (ret)
2638                                 return ret;
2639
2640                         /* As the head data may be changed when GRO enable, copy
2641                          * the head data in after other data rx completed
2642                          */
2643                         memcpy(skb->data, ring->va,
2644                                ALIGN(ring->pull_len, sizeof(long)));
2645                 }
2646         } else {
2647                 ret = hns3_add_frag(ring, desc, &skb, true);
2648                 if (ret)
2649                         return ret;
2650
2651                 /* As the head data may be changed when GRO enable, copy
2652                  * the head data in after other data rx completed
2653                  */
2654                 memcpy(skb->data, ring->va,
2655                        ALIGN(ring->pull_len, sizeof(long)));
2656         }
2657
2658         l234info = le32_to_cpu(desc->rx.l234_info);
2659         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2660
2661         /* Based on hw strategy, the tag offloaded will be stored at
2662          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2663          * in one layer tag case.
2664          */
2665         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2666                 u16 vlan_tag;
2667
2668                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2669                         __vlan_hwaccel_put_tag(skb,
2670                                                htons(ETH_P_8021Q),
2671                                                vlan_tag);
2672         }
2673
2674         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2675                 u64_stats_update_begin(&ring->syncp);
2676                 ring->stats.non_vld_descs++;
2677                 u64_stats_update_end(&ring->syncp);
2678
2679                 dev_kfree_skb_any(skb);
2680                 return -EINVAL;
2681         }
2682
2683         if (unlikely((!desc->rx.pkt_len) ||
2684                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2685                 u64_stats_update_begin(&ring->syncp);
2686                 ring->stats.err_pkt_len++;
2687                 u64_stats_update_end(&ring->syncp);
2688
2689                 dev_kfree_skb_any(skb);
2690                 return -EFAULT;
2691         }
2692
2693         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2694                 u64_stats_update_begin(&ring->syncp);
2695                 ring->stats.l2_err++;
2696                 u64_stats_update_end(&ring->syncp);
2697
2698                 dev_kfree_skb_any(skb);
2699                 return -EFAULT;
2700         }
2701
2702         l2_frame_type = hnae3_get_field(l234info, HNS3_RXD_DMAC_M,
2703                                         HNS3_RXD_DMAC_S);
2704         u64_stats_update_begin(&ring->syncp);
2705         if (l2_frame_type == HNS3_L2_TYPE_MULTICAST)
2706                 ring->stats.rx_multicast++;
2707
2708         ring->stats.rx_pkts++;
2709         ring->stats.rx_bytes += skb->len;
2710         u64_stats_update_end(&ring->syncp);
2711
2712         ring->tqp_vector->rx_group.total_bytes += skb->len;
2713
2714         /* This is needed in order to enable forwarding support */
2715         hns3_set_gro_param(skb, l234info, bd_base_info);
2716
2717         hns3_rx_checksum(ring, skb, desc);
2718         *out_skb = skb;
2719         hns3_set_rx_skb_rss_type(ring, skb);
2720
2721         return 0;
2722 }
2723
2724 int hns3_clean_rx_ring(
2725                 struct hns3_enet_ring *ring, int budget,
2726                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2727 {
2728 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2729         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2730         int recv_pkts, recv_bds, clean_count, err;
2731         int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
2732         struct sk_buff *skb = ring->skb;
2733         int num;
2734
2735         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2736         rmb(); /* Make sure num taken effect before the other data is touched */
2737
2738         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2739         num -= unused_count;
2740
2741         while (recv_pkts < budget && recv_bds < num) {
2742                 /* Reuse or realloc buffers */
2743                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2744                         hns3_nic_alloc_rx_buffers(ring,
2745                                                   clean_count + unused_count);
2746                         clean_count = 0;
2747                         unused_count = hns3_desc_unused(ring) -
2748                                         ring->pending_buf;
2749                 }
2750
2751                 /* Poll one pkt */
2752                 err = hns3_handle_rx_bd(ring, &skb);
2753                 if (unlikely(!skb)) /* This fault cannot be repaired */
2754                         goto out;
2755
2756                 if (err == -ENXIO) { /* Do not get FE for the packet */
2757                         goto out;
2758                 } else if (unlikely(err)) {  /* Do jump the err */
2759                         recv_bds += ring->pending_buf;
2760                         clean_count += ring->pending_buf;
2761                         ring->skb = NULL;
2762                         ring->pending_buf = 0;
2763                         continue;
2764                 }
2765
2766                 /* Do update ip stack process */
2767                 skb->protocol = eth_type_trans(skb, netdev);
2768                 rx_fn(ring, skb);
2769                 recv_bds += ring->pending_buf;
2770                 clean_count += ring->pending_buf;
2771                 ring->skb = NULL;
2772                 ring->pending_buf = 0;
2773
2774                 recv_pkts++;
2775         }
2776
2777 out:
2778         /* Make all data has been write before submit */
2779         if (clean_count + unused_count > 0)
2780                 hns3_nic_alloc_rx_buffers(ring,
2781                                           clean_count + unused_count);
2782
2783         return recv_pkts;
2784 }
2785
2786 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2787 {
2788         struct hns3_enet_tqp_vector *tqp_vector =
2789                                         ring_group->ring->tqp_vector;
2790         enum hns3_flow_level_range new_flow_level;
2791         int packets_per_msecs;
2792         int bytes_per_msecs;
2793         u32 time_passed_ms;
2794         u16 new_int_gl;
2795
2796         if (!tqp_vector->last_jiffies)
2797                 return false;
2798
2799         if (ring_group->total_packets == 0) {
2800                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2801                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2802                 return true;
2803         }
2804
2805         /* Simple throttlerate management
2806          * 0-10MB/s   lower     (50000 ints/s)
2807          * 10-20MB/s   middle    (20000 ints/s)
2808          * 20-1249MB/s high      (18000 ints/s)
2809          * > 40000pps  ultra     (8000 ints/s)
2810          */
2811         new_flow_level = ring_group->coal.flow_level;
2812         new_int_gl = ring_group->coal.int_gl;
2813         time_passed_ms =
2814                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2815
2816         if (!time_passed_ms)
2817                 return false;
2818
2819         do_div(ring_group->total_packets, time_passed_ms);
2820         packets_per_msecs = ring_group->total_packets;
2821
2822         do_div(ring_group->total_bytes, time_passed_ms);
2823         bytes_per_msecs = ring_group->total_bytes;
2824
2825 #define HNS3_RX_LOW_BYTE_RATE 10000
2826 #define HNS3_RX_MID_BYTE_RATE 20000
2827
2828         switch (new_flow_level) {
2829         case HNS3_FLOW_LOW:
2830                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2831                         new_flow_level = HNS3_FLOW_MID;
2832                 break;
2833         case HNS3_FLOW_MID:
2834                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2835                         new_flow_level = HNS3_FLOW_HIGH;
2836                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2837                         new_flow_level = HNS3_FLOW_LOW;
2838                 break;
2839         case HNS3_FLOW_HIGH:
2840         case HNS3_FLOW_ULTRA:
2841         default:
2842                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2843                         new_flow_level = HNS3_FLOW_MID;
2844                 break;
2845         }
2846
2847 #define HNS3_RX_ULTRA_PACKET_RATE 40
2848
2849         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2850             &tqp_vector->rx_group == ring_group)
2851                 new_flow_level = HNS3_FLOW_ULTRA;
2852
2853         switch (new_flow_level) {
2854         case HNS3_FLOW_LOW:
2855                 new_int_gl = HNS3_INT_GL_50K;
2856                 break;
2857         case HNS3_FLOW_MID:
2858                 new_int_gl = HNS3_INT_GL_20K;
2859                 break;
2860         case HNS3_FLOW_HIGH:
2861                 new_int_gl = HNS3_INT_GL_18K;
2862                 break;
2863         case HNS3_FLOW_ULTRA:
2864                 new_int_gl = HNS3_INT_GL_8K;
2865                 break;
2866         default:
2867                 break;
2868         }
2869
2870         ring_group->total_bytes = 0;
2871         ring_group->total_packets = 0;
2872         ring_group->coal.flow_level = new_flow_level;
2873         if (new_int_gl != ring_group->coal.int_gl) {
2874                 ring_group->coal.int_gl = new_int_gl;
2875                 return true;
2876         }
2877         return false;
2878 }
2879
2880 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2881 {
2882         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2883         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2884         bool rx_update, tx_update;
2885
2886         /* update param every 1000ms */
2887         if (time_before(jiffies,
2888                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
2889                 return;
2890
2891         if (rx_group->coal.gl_adapt_enable) {
2892                 rx_update = hns3_get_new_int_gl(rx_group);
2893                 if (rx_update)
2894                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2895                                                        rx_group->coal.int_gl);
2896         }
2897
2898         if (tx_group->coal.gl_adapt_enable) {
2899                 tx_update = hns3_get_new_int_gl(tx_group);
2900                 if (tx_update)
2901                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2902                                                        tx_group->coal.int_gl);
2903         }
2904
2905         tqp_vector->last_jiffies = jiffies;
2906 }
2907
2908 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2909 {
2910         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
2911         struct hns3_enet_ring *ring;
2912         int rx_pkt_total = 0;
2913
2914         struct hns3_enet_tqp_vector *tqp_vector =
2915                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2916         bool clean_complete = true;
2917         int rx_budget;
2918
2919         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2920                 napi_complete(napi);
2921                 return 0;
2922         }
2923
2924         /* Since the actual Tx work is minimal, we can give the Tx a larger
2925          * budget and be more aggressive about cleaning up the Tx descriptors.
2926          */
2927         hns3_for_each_ring(ring, tqp_vector->tx_group)
2928                 hns3_clean_tx_ring(ring);
2929
2930         /* make sure rx ring budget not smaller than 1 */
2931         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2932
2933         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2934                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2935                                                     hns3_rx_skb);
2936
2937                 if (rx_cleaned >= rx_budget)
2938                         clean_complete = false;
2939
2940                 rx_pkt_total += rx_cleaned;
2941         }
2942
2943         tqp_vector->rx_group.total_packets += rx_pkt_total;
2944
2945         if (!clean_complete)
2946                 return budget;
2947
2948         if (napi_complete(napi) &&
2949             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2950                 hns3_update_new_int_gl(tqp_vector);
2951                 hns3_mask_vector_irq(tqp_vector, 1);
2952         }
2953
2954         return rx_pkt_total;
2955 }
2956
2957 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2958                                       struct hnae3_ring_chain_node *head)
2959 {
2960         struct pci_dev *pdev = tqp_vector->handle->pdev;
2961         struct hnae3_ring_chain_node *cur_chain = head;
2962         struct hnae3_ring_chain_node *chain;
2963         struct hns3_enet_ring *tx_ring;
2964         struct hns3_enet_ring *rx_ring;
2965
2966         tx_ring = tqp_vector->tx_group.ring;
2967         if (tx_ring) {
2968                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2969                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2970                               HNAE3_RING_TYPE_TX);
2971                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2972                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2973
2974                 cur_chain->next = NULL;
2975
2976                 while (tx_ring->next) {
2977                         tx_ring = tx_ring->next;
2978
2979                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2980                                              GFP_KERNEL);
2981                         if (!chain)
2982                                 goto err_free_chain;
2983
2984                         cur_chain->next = chain;
2985                         chain->tqp_index = tx_ring->tqp->tqp_index;
2986                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2987                                       HNAE3_RING_TYPE_TX);
2988                         hnae3_set_field(chain->int_gl_idx,
2989                                         HNAE3_RING_GL_IDX_M,
2990                                         HNAE3_RING_GL_IDX_S,
2991                                         HNAE3_RING_GL_TX);
2992
2993                         cur_chain = chain;
2994                 }
2995         }
2996
2997         rx_ring = tqp_vector->rx_group.ring;
2998         if (!tx_ring && rx_ring) {
2999                 cur_chain->next = NULL;
3000                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
3001                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3002                               HNAE3_RING_TYPE_RX);
3003                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3004                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3005
3006                 rx_ring = rx_ring->next;
3007         }
3008
3009         while (rx_ring) {
3010                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
3011                 if (!chain)
3012                         goto err_free_chain;
3013
3014                 cur_chain->next = chain;
3015                 chain->tqp_index = rx_ring->tqp->tqp_index;
3016                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3017                               HNAE3_RING_TYPE_RX);
3018                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3019                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3020
3021                 cur_chain = chain;
3022
3023                 rx_ring = rx_ring->next;
3024         }
3025
3026         return 0;
3027
3028 err_free_chain:
3029         cur_chain = head->next;
3030         while (cur_chain) {
3031                 chain = cur_chain->next;
3032                 devm_kfree(&pdev->dev, cur_chain);
3033                 cur_chain = chain;
3034         }
3035         head->next = NULL;
3036
3037         return -ENOMEM;
3038 }
3039
3040 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3041                                         struct hnae3_ring_chain_node *head)
3042 {
3043         struct pci_dev *pdev = tqp_vector->handle->pdev;
3044         struct hnae3_ring_chain_node *chain_tmp, *chain;
3045
3046         chain = head->next;
3047
3048         while (chain) {
3049                 chain_tmp = chain->next;
3050                 devm_kfree(&pdev->dev, chain);
3051                 chain = chain_tmp;
3052         }
3053 }
3054
3055 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3056                                    struct hns3_enet_ring *ring)
3057 {
3058         ring->next = group->ring;
3059         group->ring = ring;
3060
3061         group->count++;
3062 }
3063
3064 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3065 {
3066         struct pci_dev *pdev = priv->ae_handle->pdev;
3067         struct hns3_enet_tqp_vector *tqp_vector;
3068         int num_vectors = priv->vector_num;
3069         int numa_node;
3070         int vector_i;
3071
3072         numa_node = dev_to_node(&pdev->dev);
3073
3074         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3075                 tqp_vector = &priv->tqp_vector[vector_i];
3076                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3077                                 &tqp_vector->affinity_mask);
3078         }
3079 }
3080
3081 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3082 {
3083         struct hnae3_ring_chain_node vector_ring_chain;
3084         struct hnae3_handle *h = priv->ae_handle;
3085         struct hns3_enet_tqp_vector *tqp_vector;
3086         int ret = 0;
3087         int i;
3088
3089         hns3_nic_set_cpumask(priv);
3090
3091         for (i = 0; i < priv->vector_num; i++) {
3092                 tqp_vector = &priv->tqp_vector[i];
3093                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3094                 tqp_vector->num_tqps = 0;
3095         }
3096
3097         for (i = 0; i < h->kinfo.num_tqps; i++) {
3098                 u16 vector_i = i % priv->vector_num;
3099                 u16 tqp_num = h->kinfo.num_tqps;
3100
3101                 tqp_vector = &priv->tqp_vector[vector_i];
3102
3103                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3104                                        priv->ring_data[i].ring);
3105
3106                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3107                                        priv->ring_data[i + tqp_num].ring);
3108
3109                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3110                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3111                 tqp_vector->num_tqps++;
3112         }
3113
3114         for (i = 0; i < priv->vector_num; i++) {
3115                 tqp_vector = &priv->tqp_vector[i];
3116
3117                 tqp_vector->rx_group.total_bytes = 0;
3118                 tqp_vector->rx_group.total_packets = 0;
3119                 tqp_vector->tx_group.total_bytes = 0;
3120                 tqp_vector->tx_group.total_packets = 0;
3121                 tqp_vector->handle = h;
3122
3123                 ret = hns3_get_vector_ring_chain(tqp_vector,
3124                                                  &vector_ring_chain);
3125                 if (ret)
3126                         goto map_ring_fail;
3127
3128                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3129                         tqp_vector->vector_irq, &vector_ring_chain);
3130
3131                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3132
3133                 if (ret)
3134                         goto map_ring_fail;
3135
3136                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3137                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3138         }
3139
3140         return 0;
3141
3142 map_ring_fail:
3143         while (i--)
3144                 netif_napi_del(&priv->tqp_vector[i].napi);
3145
3146         return ret;
3147 }
3148
3149 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3150 {
3151 #define HNS3_VECTOR_PF_MAX_NUM          64
3152
3153         struct hnae3_handle *h = priv->ae_handle;
3154         struct hns3_enet_tqp_vector *tqp_vector;
3155         struct hnae3_vector_info *vector;
3156         struct pci_dev *pdev = h->pdev;
3157         u16 tqp_num = h->kinfo.num_tqps;
3158         u16 vector_num;
3159         int ret = 0;
3160         u16 i;
3161
3162         /* RSS size, cpu online and vector_num should be the same */
3163         /* Should consider 2p/4p later */
3164         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3165         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3166
3167         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3168                               GFP_KERNEL);
3169         if (!vector)
3170                 return -ENOMEM;
3171
3172         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3173
3174         priv->vector_num = vector_num;
3175         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3176                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3177                              GFP_KERNEL);
3178         if (!priv->tqp_vector) {
3179                 ret = -ENOMEM;
3180                 goto out;
3181         }
3182
3183         for (i = 0; i < priv->vector_num; i++) {
3184                 tqp_vector = &priv->tqp_vector[i];
3185                 tqp_vector->idx = i;
3186                 tqp_vector->mask_addr = vector[i].io_addr;
3187                 tqp_vector->vector_irq = vector[i].vector;
3188                 hns3_vector_gl_rl_init(tqp_vector, priv);
3189         }
3190
3191 out:
3192         devm_kfree(&pdev->dev, vector);
3193         return ret;
3194 }
3195
3196 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3197 {
3198         group->ring = NULL;
3199         group->count = 0;
3200 }
3201
3202 static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3203 {
3204         struct hnae3_ring_chain_node vector_ring_chain;
3205         struct hnae3_handle *h = priv->ae_handle;
3206         struct hns3_enet_tqp_vector *tqp_vector;
3207         int i;
3208
3209         for (i = 0; i < priv->vector_num; i++) {
3210                 tqp_vector = &priv->tqp_vector[i];
3211
3212                 if (!tqp_vector->rx_group.ring && !tqp_vector->tx_group.ring)
3213                         continue;
3214
3215                 hns3_get_vector_ring_chain(tqp_vector, &vector_ring_chain);
3216
3217                 h->ae_algo->ops->unmap_ring_from_vector(h,
3218                         tqp_vector->vector_irq, &vector_ring_chain);
3219
3220                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3221
3222                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3223                         irq_set_affinity_notifier(tqp_vector->vector_irq,
3224                                                   NULL);
3225                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3226                         free_irq(tqp_vector->vector_irq, tqp_vector);
3227                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3228                 }
3229
3230                 hns3_clear_ring_group(&tqp_vector->rx_group);
3231                 hns3_clear_ring_group(&tqp_vector->tx_group);
3232                 netif_napi_del(&priv->tqp_vector[i].napi);
3233         }
3234 }
3235
3236 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3237 {
3238         struct hnae3_handle *h = priv->ae_handle;
3239         struct pci_dev *pdev = h->pdev;
3240         int i, ret;
3241
3242         for (i = 0; i < priv->vector_num; i++) {
3243                 struct hns3_enet_tqp_vector *tqp_vector;
3244
3245                 tqp_vector = &priv->tqp_vector[i];
3246                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3247                 if (ret)
3248                         return ret;
3249         }
3250
3251         devm_kfree(&pdev->dev, priv->tqp_vector);
3252         return 0;
3253 }
3254
3255 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3256                              int ring_type)
3257 {
3258         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3259         int queue_num = priv->ae_handle->kinfo.num_tqps;
3260         int desc_num = priv->ae_handle->kinfo.num_desc;
3261         struct pci_dev *pdev = priv->ae_handle->pdev;
3262         struct hns3_enet_ring *ring;
3263
3264         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3265         if (!ring)
3266                 return -ENOMEM;
3267
3268         if (ring_type == HNAE3_RING_TYPE_TX) {
3269                 ring_data[q->tqp_index].ring = ring;
3270                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3271                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3272         } else {
3273                 ring_data[q->tqp_index + queue_num].ring = ring;
3274                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3275                 ring->io_base = q->io_base;
3276         }
3277
3278         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3279
3280         ring->tqp = q;
3281         ring->desc = NULL;
3282         ring->desc_cb = NULL;
3283         ring->dev = priv->dev;
3284         ring->desc_dma_addr = 0;
3285         ring->buf_size = q->buf_size;
3286         ring->desc_num = desc_num;
3287         ring->next_to_use = 0;
3288         ring->next_to_clean = 0;
3289
3290         return 0;
3291 }
3292
3293 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3294                               struct hns3_nic_priv *priv)
3295 {
3296         int ret;
3297
3298         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3299         if (ret)
3300                 return ret;
3301
3302         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3303         if (ret) {
3304                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3305                 return ret;
3306         }
3307
3308         return 0;
3309 }
3310
3311 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3312 {
3313         struct hnae3_handle *h = priv->ae_handle;
3314         struct pci_dev *pdev = h->pdev;
3315         int i, ret;
3316
3317         priv->ring_data =  devm_kzalloc(&pdev->dev,
3318                                         array3_size(h->kinfo.num_tqps,
3319                                                     sizeof(*priv->ring_data),
3320                                                     2),
3321                                         GFP_KERNEL);
3322         if (!priv->ring_data)
3323                 return -ENOMEM;
3324
3325         for (i = 0; i < h->kinfo.num_tqps; i++) {
3326                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3327                 if (ret)
3328                         goto err;
3329         }
3330
3331         return 0;
3332 err:
3333         while (i--) {
3334                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3335                 devm_kfree(priv->dev,
3336                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3337         }
3338
3339         devm_kfree(&pdev->dev, priv->ring_data);
3340         return ret;
3341 }
3342
3343 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3344 {
3345         struct hnae3_handle *h = priv->ae_handle;
3346         int i;
3347
3348         for (i = 0; i < h->kinfo.num_tqps; i++) {
3349                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3350                 devm_kfree(priv->dev,
3351                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3352         }
3353         devm_kfree(priv->dev, priv->ring_data);
3354 }
3355
3356 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3357 {
3358         int ret;
3359
3360         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3361                 return -EINVAL;
3362
3363         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
3364                                 GFP_KERNEL);
3365         if (!ring->desc_cb) {
3366                 ret = -ENOMEM;
3367                 goto out;
3368         }
3369
3370         ret = hns3_alloc_desc(ring);
3371         if (ret)
3372                 goto out_with_desc_cb;
3373
3374         if (!HNAE3_IS_TX_RING(ring)) {
3375                 ret = hns3_alloc_ring_buffers(ring);
3376                 if (ret)
3377                         goto out_with_desc;
3378         }
3379
3380         return 0;
3381
3382 out_with_desc:
3383         hns3_free_desc(ring);
3384 out_with_desc_cb:
3385         kfree(ring->desc_cb);
3386         ring->desc_cb = NULL;
3387 out:
3388         return ret;
3389 }
3390
3391 static void hns3_fini_ring(struct hns3_enet_ring *ring)
3392 {
3393         hns3_free_desc(ring);
3394         kfree(ring->desc_cb);
3395         ring->desc_cb = NULL;
3396         ring->next_to_clean = 0;
3397         ring->next_to_use = 0;
3398         ring->pending_buf = 0;
3399         if (ring->skb) {
3400                 dev_kfree_skb_any(ring->skb);
3401                 ring->skb = NULL;
3402         }
3403 }
3404
3405 static int hns3_buf_size2type(u32 buf_size)
3406 {
3407         int bd_size_type;
3408
3409         switch (buf_size) {
3410         case 512:
3411                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3412                 break;
3413         case 1024:
3414                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3415                 break;
3416         case 2048:
3417                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3418                 break;
3419         case 4096:
3420                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3421                 break;
3422         default:
3423                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3424         }
3425
3426         return bd_size_type;
3427 }
3428
3429 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3430 {
3431         dma_addr_t dma = ring->desc_dma_addr;
3432         struct hnae3_queue *q = ring->tqp;
3433
3434         if (!HNAE3_IS_TX_RING(ring)) {
3435                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3436                                (u32)dma);
3437                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3438                                (u32)((dma >> 31) >> 1));
3439
3440                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3441                                hns3_buf_size2type(ring->buf_size));
3442                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3443                                ring->desc_num / 8 - 1);
3444
3445         } else {
3446                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3447                                (u32)dma);
3448                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3449                                (u32)((dma >> 31) >> 1));
3450
3451                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3452                                ring->desc_num / 8 - 1);
3453         }
3454 }
3455
3456 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3457 {
3458         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3459         int i;
3460
3461         for (i = 0; i < HNAE3_MAX_TC; i++) {
3462                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3463                 int j;
3464
3465                 if (!tc_info->enable)
3466                         continue;
3467
3468                 for (j = 0; j < tc_info->tqp_count; j++) {
3469                         struct hnae3_queue *q;
3470
3471                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3472                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3473                                        tc_info->tc);
3474                 }
3475         }
3476 }
3477
3478 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3479 {
3480         struct hnae3_handle *h = priv->ae_handle;
3481         int ring_num = h->kinfo.num_tqps * 2;
3482         int i, j;
3483         int ret;
3484
3485         for (i = 0; i < ring_num; i++) {
3486                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3487                 if (ret) {
3488                         dev_err(priv->dev,
3489                                 "Alloc ring memory fail! ret=%d\n", ret);
3490                         goto out_when_alloc_ring_memory;
3491                 }
3492
3493                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3494         }
3495
3496         return 0;
3497
3498 out_when_alloc_ring_memory:
3499         for (j = i - 1; j >= 0; j--)
3500                 hns3_fini_ring(priv->ring_data[j].ring);
3501
3502         return -ENOMEM;
3503 }
3504
3505 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3506 {
3507         struct hnae3_handle *h = priv->ae_handle;
3508         int i;
3509
3510         for (i = 0; i < h->kinfo.num_tqps; i++) {
3511                 hns3_fini_ring(priv->ring_data[i].ring);
3512                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3513         }
3514         return 0;
3515 }
3516
3517 /* Set mac addr if it is configured. or leave it to the AE driver */
3518 static int hns3_init_mac_addr(struct net_device *netdev, bool init)
3519 {
3520         struct hns3_nic_priv *priv = netdev_priv(netdev);
3521         struct hnae3_handle *h = priv->ae_handle;
3522         u8 mac_addr_temp[ETH_ALEN];
3523         int ret = 0;
3524
3525         if (h->ae_algo->ops->get_mac_addr && init) {
3526                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3527                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3528         }
3529
3530         /* Check if the MAC address is valid, if not get a random one */
3531         if (!is_valid_ether_addr(netdev->dev_addr)) {
3532                 eth_hw_addr_random(netdev);
3533                 dev_warn(priv->dev, "using random MAC address %pM\n",
3534                          netdev->dev_addr);
3535         }
3536
3537         if (h->ae_algo->ops->set_mac_addr)
3538                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3539
3540         return ret;
3541 }
3542
3543 static int hns3_init_phy(struct net_device *netdev)
3544 {
3545         struct hnae3_handle *h = hns3_get_handle(netdev);
3546         int ret = 0;
3547
3548         if (h->ae_algo->ops->mac_connect_phy)
3549                 ret = h->ae_algo->ops->mac_connect_phy(h);
3550
3551         return ret;
3552 }
3553
3554 static void hns3_uninit_phy(struct net_device *netdev)
3555 {
3556         struct hnae3_handle *h = hns3_get_handle(netdev);
3557
3558         if (h->ae_algo->ops->mac_disconnect_phy)
3559                 h->ae_algo->ops->mac_disconnect_phy(h);
3560 }
3561
3562 static int hns3_restore_fd_rules(struct net_device *netdev)
3563 {
3564         struct hnae3_handle *h = hns3_get_handle(netdev);
3565         int ret = 0;
3566
3567         if (h->ae_algo->ops->restore_fd_rules)
3568                 ret = h->ae_algo->ops->restore_fd_rules(h);
3569
3570         return ret;
3571 }
3572
3573 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3574 {
3575         struct hnae3_handle *h = hns3_get_handle(netdev);
3576
3577         if (h->ae_algo->ops->del_all_fd_entries)
3578                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3579 }
3580
3581 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3582 {
3583         struct hns3_nic_priv *priv = netdev_priv(netdev);
3584
3585         priv->ops.fill_desc = hns3_fill_desc;
3586         if ((netdev->features & NETIF_F_TSO) ||
3587             (netdev->features & NETIF_F_TSO6))
3588                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3589         else
3590                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3591 }
3592
3593 static int hns3_client_start(struct hnae3_handle *handle)
3594 {
3595         if (!handle->ae_algo->ops->client_start)
3596                 return 0;
3597
3598         return handle->ae_algo->ops->client_start(handle);
3599 }
3600
3601 static void hns3_client_stop(struct hnae3_handle *handle)
3602 {
3603         if (!handle->ae_algo->ops->client_stop)
3604                 return;
3605
3606         handle->ae_algo->ops->client_stop(handle);
3607 }
3608
3609 static int hns3_client_init(struct hnae3_handle *handle)
3610 {
3611         struct pci_dev *pdev = handle->pdev;
3612         u16 alloc_tqps, max_rss_size;
3613         struct hns3_nic_priv *priv;
3614         struct net_device *netdev;
3615         int ret;
3616
3617         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3618                                                     &max_rss_size);
3619         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3620         if (!netdev)
3621                 return -ENOMEM;
3622
3623         priv = netdev_priv(netdev);
3624         priv->dev = &pdev->dev;
3625         priv->netdev = netdev;
3626         priv->ae_handle = handle;
3627         priv->tx_timeout_count = 0;
3628         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
3629
3630         handle->kinfo.netdev = netdev;
3631         handle->priv = (void *)priv;
3632
3633         hns3_init_mac_addr(netdev, true);
3634
3635         hns3_set_default_feature(netdev);
3636
3637         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3638         netdev->priv_flags |= IFF_UNICAST_FLT;
3639         netdev->netdev_ops = &hns3_nic_netdev_ops;
3640         SET_NETDEV_DEV(netdev, &pdev->dev);
3641         hns3_ethtool_set_ops(netdev);
3642         hns3_nic_set_priv_ops(netdev);
3643
3644         /* Carrier off reporting is important to ethtool even BEFORE open */
3645         netif_carrier_off(netdev);
3646
3647         ret = hns3_get_ring_config(priv);
3648         if (ret) {
3649                 ret = -ENOMEM;
3650                 goto out_get_ring_cfg;
3651         }
3652
3653         ret = hns3_nic_alloc_vector_data(priv);
3654         if (ret) {
3655                 ret = -ENOMEM;
3656                 goto out_alloc_vector_data;
3657         }
3658
3659         ret = hns3_nic_init_vector_data(priv);
3660         if (ret) {
3661                 ret = -ENOMEM;
3662                 goto out_init_vector_data;
3663         }
3664
3665         ret = hns3_init_all_ring(priv);
3666         if (ret) {
3667                 ret = -ENOMEM;
3668                 goto out_init_ring_data;
3669         }
3670
3671         ret = hns3_init_phy(netdev);
3672         if (ret)
3673                 goto out_init_phy;
3674
3675         ret = register_netdev(netdev);
3676         if (ret) {
3677                 dev_err(priv->dev, "probe register netdev fail!\n");
3678                 goto out_reg_netdev_fail;
3679         }
3680
3681         ret = hns3_client_start(handle);
3682         if (ret) {
3683                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
3684                         goto out_reg_netdev_fail;
3685         }
3686
3687         hns3_dcbnl_setup(handle);
3688
3689         hns3_dbg_init(handle);
3690
3691         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
3692         netdev->max_mtu = HNS3_MAX_MTU;
3693
3694         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
3695
3696         return ret;
3697
3698 out_reg_netdev_fail:
3699         hns3_uninit_phy(netdev);
3700 out_init_phy:
3701         hns3_uninit_all_ring(priv);
3702 out_init_ring_data:
3703         hns3_nic_uninit_vector_data(priv);
3704 out_init_vector_data:
3705         hns3_nic_dealloc_vector_data(priv);
3706 out_alloc_vector_data:
3707         priv->ring_data = NULL;
3708 out_get_ring_cfg:
3709         priv->ae_handle = NULL;
3710         free_netdev(netdev);
3711         return ret;
3712 }
3713
3714 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3715 {
3716         struct net_device *netdev = handle->kinfo.netdev;
3717         struct hns3_nic_priv *priv = netdev_priv(netdev);
3718         int ret;
3719
3720         hns3_client_stop(handle);
3721
3722         hns3_remove_hw_addr(netdev);
3723
3724         if (netdev->reg_state != NETREG_UNINITIALIZED)
3725                 unregister_netdev(netdev);
3726
3727         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
3728                 netdev_warn(netdev, "already uninitialized\n");
3729                 goto out_netdev_free;
3730         }
3731
3732         hns3_del_all_fd_rules(netdev, true);
3733
3734         hns3_force_clear_all_rx_ring(handle);
3735
3736         hns3_uninit_phy(netdev);
3737
3738         hns3_nic_uninit_vector_data(priv);
3739
3740         ret = hns3_nic_dealloc_vector_data(priv);
3741         if (ret)
3742                 netdev_err(netdev, "dealloc vector error\n");
3743
3744         ret = hns3_uninit_all_ring(priv);
3745         if (ret)
3746                 netdev_err(netdev, "uninit ring error\n");
3747
3748         hns3_put_ring_config(priv);
3749
3750         hns3_dbg_uninit(handle);
3751
3752         priv->ring_data = NULL;
3753
3754 out_netdev_free:
3755         free_netdev(netdev);
3756 }
3757
3758 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3759 {
3760         struct net_device *netdev = handle->kinfo.netdev;
3761
3762         if (!netdev)
3763                 return;
3764
3765         if (linkup) {
3766                 netif_carrier_on(netdev);
3767                 netif_tx_wake_all_queues(netdev);
3768                 netdev_info(netdev, "link up\n");
3769         } else {
3770                 netif_carrier_off(netdev);
3771                 netif_tx_stop_all_queues(netdev);
3772                 netdev_info(netdev, "link down\n");
3773         }
3774 }
3775
3776 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3777 {
3778         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3779         struct net_device *ndev = kinfo->netdev;
3780
3781         if (tc > HNAE3_MAX_TC)
3782                 return -EINVAL;
3783
3784         if (!ndev)
3785                 return -ENODEV;
3786
3787         return hns3_nic_set_real_num_queue(ndev);
3788 }
3789
3790 static int hns3_recover_hw_addr(struct net_device *ndev)
3791 {
3792         struct netdev_hw_addr_list *list;
3793         struct netdev_hw_addr *ha, *tmp;
3794         int ret = 0;
3795
3796         /* go through and sync uc_addr entries to the device */
3797         list = &ndev->uc;
3798         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3799                 ret = hns3_nic_uc_sync(ndev, ha->addr);
3800                 if (ret)
3801                         return ret;
3802         }
3803
3804         /* go through and sync mc_addr entries to the device */
3805         list = &ndev->mc;
3806         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3807                 ret = hns3_nic_mc_sync(ndev, ha->addr);
3808                 if (ret)
3809                         return ret;
3810         }
3811
3812         return ret;
3813 }
3814
3815 static void hns3_remove_hw_addr(struct net_device *netdev)
3816 {
3817         struct netdev_hw_addr_list *list;
3818         struct netdev_hw_addr *ha, *tmp;
3819
3820         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
3821
3822         /* go through and unsync uc_addr entries to the device */
3823         list = &netdev->uc;
3824         list_for_each_entry_safe(ha, tmp, &list->list, list)
3825                 hns3_nic_uc_unsync(netdev, ha->addr);
3826
3827         /* go through and unsync mc_addr entries to the device */
3828         list = &netdev->mc;
3829         list_for_each_entry_safe(ha, tmp, &list->list, list)
3830                 if (ha->refcount > 1)
3831                         hns3_nic_mc_unsync(netdev, ha->addr);
3832 }
3833
3834 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3835 {
3836         while (ring->next_to_clean != ring->next_to_use) {
3837                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3838                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3839                 ring_ptr_move_fw(ring, next_to_clean);
3840         }
3841 }
3842
3843 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3844 {
3845         struct hns3_desc_cb res_cbs;
3846         int ret;
3847
3848         while (ring->next_to_use != ring->next_to_clean) {
3849                 /* When a buffer is not reused, it's memory has been
3850                  * freed in hns3_handle_rx_bd or will be freed by
3851                  * stack, so we need to replace the buffer here.
3852                  */
3853                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3854                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3855                         if (ret) {
3856                                 u64_stats_update_begin(&ring->syncp);
3857                                 ring->stats.sw_err_cnt++;
3858                                 u64_stats_update_end(&ring->syncp);
3859                                 /* if alloc new buffer fail, exit directly
3860                                  * and reclear in up flow.
3861                                  */
3862                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3863                                             "reserve buffer map failed, ret = %d\n",
3864                                             ret);
3865                                 return ret;
3866                         }
3867                         hns3_replace_buffer(ring, ring->next_to_use,
3868                                             &res_cbs);
3869                 }
3870                 ring_ptr_move_fw(ring, next_to_use);
3871         }
3872
3873         return 0;
3874 }
3875
3876 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3877 {
3878         while (ring->next_to_use != ring->next_to_clean) {
3879                 /* When a buffer is not reused, it's memory has been
3880                  * freed in hns3_handle_rx_bd or will be freed by
3881                  * stack, so only need to unmap the buffer here.
3882                  */
3883                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3884                         hns3_unmap_buffer(ring,
3885                                           &ring->desc_cb[ring->next_to_use]);
3886                         ring->desc_cb[ring->next_to_use].dma = 0;
3887                 }
3888
3889                 ring_ptr_move_fw(ring, next_to_use);
3890         }
3891 }
3892
3893 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3894 {
3895         struct net_device *ndev = h->kinfo.netdev;
3896         struct hns3_nic_priv *priv = netdev_priv(ndev);
3897         struct hns3_enet_ring *ring;
3898         u32 i;
3899
3900         for (i = 0; i < h->kinfo.num_tqps; i++) {
3901                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3902                 hns3_force_clear_rx_ring(ring);
3903         }
3904 }
3905
3906 static void hns3_clear_all_ring(struct hnae3_handle *h)
3907 {
3908         struct net_device *ndev = h->kinfo.netdev;
3909         struct hns3_nic_priv *priv = netdev_priv(ndev);
3910         u32 i;
3911
3912         for (i = 0; i < h->kinfo.num_tqps; i++) {
3913                 struct netdev_queue *dev_queue;
3914                 struct hns3_enet_ring *ring;
3915
3916                 ring = priv->ring_data[i].ring;
3917                 hns3_clear_tx_ring(ring);
3918                 dev_queue = netdev_get_tx_queue(ndev,
3919                                                 priv->ring_data[i].queue_index);
3920                 netdev_tx_reset_queue(dev_queue);
3921
3922                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3923                 /* Continue to clear other rings even if clearing some
3924                  * rings failed.
3925                  */
3926                 hns3_clear_rx_ring(ring);
3927         }
3928 }
3929
3930 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3931 {
3932         struct net_device *ndev = h->kinfo.netdev;
3933         struct hns3_nic_priv *priv = netdev_priv(ndev);
3934         struct hns3_enet_ring *rx_ring;
3935         int i, j;
3936         int ret;
3937
3938         for (i = 0; i < h->kinfo.num_tqps; i++) {
3939                 ret = h->ae_algo->ops->reset_queue(h, i);
3940                 if (ret)
3941                         return ret;
3942
3943                 hns3_init_ring_hw(priv->ring_data[i].ring);
3944
3945                 /* We need to clear tx ring here because self test will
3946                  * use the ring and will not run down before up
3947                  */
3948                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3949                 priv->ring_data[i].ring->next_to_clean = 0;
3950                 priv->ring_data[i].ring->next_to_use = 0;
3951
3952                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3953                 hns3_init_ring_hw(rx_ring);
3954                 ret = hns3_clear_rx_ring(rx_ring);
3955                 if (ret)
3956                         return ret;
3957
3958                 /* We can not know the hardware head and tail when this
3959                  * function is called in reset flow, so we reuse all desc.
3960                  */
3961                 for (j = 0; j < rx_ring->desc_num; j++)
3962                         hns3_reuse_buffer(rx_ring, j);
3963
3964                 rx_ring->next_to_clean = 0;
3965                 rx_ring->next_to_use = 0;
3966         }
3967
3968         hns3_init_tx_ring_tc(priv);
3969
3970         return 0;
3971 }
3972
3973 static void hns3_store_coal(struct hns3_nic_priv *priv)
3974 {
3975         /* ethtool only support setting and querying one coal
3976          * configuation for now, so save the vector 0' coal
3977          * configuation here in order to restore it.
3978          */
3979         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3980                sizeof(struct hns3_enet_coalesce));
3981         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3982                sizeof(struct hns3_enet_coalesce));
3983 }
3984
3985 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3986 {
3987         u16 vector_num = priv->vector_num;
3988         int i;
3989
3990         for (i = 0; i < vector_num; i++) {
3991                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3992                        sizeof(struct hns3_enet_coalesce));
3993                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3994                        sizeof(struct hns3_enet_coalesce));
3995         }
3996 }
3997
3998 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3999 {
4000         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
4001         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4002         struct net_device *ndev = kinfo->netdev;
4003         struct hns3_nic_priv *priv = netdev_priv(ndev);
4004
4005         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
4006                 return 0;
4007
4008         /* it is cumbersome for hardware to pick-and-choose entries for deletion
4009          * from table space. Hence, for function reset software intervention is
4010          * required to delete the entries
4011          */
4012         if (hns3_dev_ongoing_func_reset(ae_dev)) {
4013                 hns3_remove_hw_addr(ndev);
4014                 hns3_del_all_fd_rules(ndev, false);
4015         }
4016
4017         if (!netif_running(ndev))
4018                 return 0;
4019
4020         return hns3_nic_net_stop(ndev);
4021 }
4022
4023 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
4024 {
4025         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4026         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
4027         int ret = 0;
4028
4029         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4030
4031         if (netif_running(kinfo->netdev)) {
4032                 ret = hns3_nic_net_open(kinfo->netdev);
4033                 if (ret) {
4034                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4035                         netdev_err(kinfo->netdev,
4036                                    "hns net up fail, ret=%d!\n", ret);
4037                         return ret;
4038                 }
4039         }
4040
4041         return ret;
4042 }
4043
4044 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4045 {
4046         struct net_device *netdev = handle->kinfo.netdev;
4047         struct hns3_nic_priv *priv = netdev_priv(netdev);
4048         int ret;
4049
4050         /* Carrier off reporting is important to ethtool even BEFORE open */
4051         netif_carrier_off(netdev);
4052
4053         ret = hns3_get_ring_config(priv);
4054         if (ret)
4055                 return ret;
4056
4057         ret = hns3_nic_alloc_vector_data(priv);
4058         if (ret)
4059                 goto err_put_ring;
4060
4061         hns3_restore_coal(priv);
4062
4063         ret = hns3_nic_init_vector_data(priv);
4064         if (ret)
4065                 goto err_dealloc_vector;
4066
4067         ret = hns3_init_all_ring(priv);
4068         if (ret)
4069                 goto err_uninit_vector;
4070
4071         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4072
4073         return ret;
4074
4075 err_uninit_vector:
4076         hns3_nic_uninit_vector_data(priv);
4077         priv->ring_data = NULL;
4078 err_dealloc_vector:
4079         hns3_nic_dealloc_vector_data(priv);
4080 err_put_ring:
4081         hns3_put_ring_config(priv);
4082         priv->ring_data = NULL;
4083
4084         return ret;
4085 }
4086
4087 static int hns3_reset_notify_restore_enet(struct hnae3_handle *handle)
4088 {
4089         struct net_device *netdev = handle->kinfo.netdev;
4090         bool vlan_filter_enable;
4091         int ret;
4092
4093         ret = hns3_init_mac_addr(netdev, false);
4094         if (ret)
4095                 return ret;
4096
4097         ret = hns3_recover_hw_addr(netdev);
4098         if (ret)
4099                 return ret;
4100
4101         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4102         if (ret)
4103                 return ret;
4104
4105         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4106         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4107
4108         /* Hardware table is only clear when pf resets */
4109         if (!(handle->flags & HNAE3_SUPPORT_VF)) {
4110                 ret = hns3_restore_vlan(netdev);
4111                 if (ret)
4112                         return ret;
4113         }
4114
4115         return hns3_restore_fd_rules(netdev);
4116 }
4117
4118 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4119 {
4120         struct net_device *netdev = handle->kinfo.netdev;
4121         struct hns3_nic_priv *priv = netdev_priv(netdev);
4122         int ret;
4123
4124         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4125                 netdev_warn(netdev, "already uninitialized\n");
4126                 return 0;
4127         }
4128
4129         hns3_force_clear_all_rx_ring(handle);
4130
4131         hns3_nic_uninit_vector_data(priv);
4132
4133         hns3_store_coal(priv);
4134
4135         ret = hns3_nic_dealloc_vector_data(priv);
4136         if (ret)
4137                 netdev_err(netdev, "dealloc vector error\n");
4138
4139         ret = hns3_uninit_all_ring(priv);
4140         if (ret)
4141                 netdev_err(netdev, "uninit ring error\n");
4142
4143         hns3_put_ring_config(priv);
4144         priv->ring_data = NULL;
4145
4146         clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
4147
4148         return ret;
4149 }
4150
4151 static int hns3_reset_notify(struct hnae3_handle *handle,
4152                              enum hnae3_reset_notify_type type)
4153 {
4154         int ret = 0;
4155
4156         switch (type) {
4157         case HNAE3_UP_CLIENT:
4158                 ret = hns3_reset_notify_up_enet(handle);
4159                 break;
4160         case HNAE3_DOWN_CLIENT:
4161                 ret = hns3_reset_notify_down_enet(handle);
4162                 break;
4163         case HNAE3_INIT_CLIENT:
4164                 ret = hns3_reset_notify_init_enet(handle);
4165                 break;
4166         case HNAE3_UNINIT_CLIENT:
4167                 ret = hns3_reset_notify_uninit_enet(handle);
4168                 break;
4169         case HNAE3_RESTORE_CLIENT:
4170                 ret = hns3_reset_notify_restore_enet(handle);
4171                 break;
4172         default:
4173                 break;
4174         }
4175
4176         return ret;
4177 }
4178
4179 int hns3_set_channels(struct net_device *netdev,
4180                       struct ethtool_channels *ch)
4181 {
4182         struct hnae3_handle *h = hns3_get_handle(netdev);
4183         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4184         bool rxfh_configured = netif_is_rxfh_configured(netdev);
4185         u32 new_tqp_num = ch->combined_count;
4186         u16 org_tqp_num;
4187         int ret;
4188
4189         if (ch->rx_count || ch->tx_count)
4190                 return -EINVAL;
4191
4192         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4193             new_tqp_num < 1) {
4194                 dev_err(&netdev->dev,
4195                         "Change tqps fail, the tqp range is from 1 to %d",
4196                         hns3_get_max_available_channels(h));
4197                 return -EINVAL;
4198         }
4199
4200         if (kinfo->rss_size == new_tqp_num)
4201                 return 0;
4202
4203         ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
4204         if (ret)
4205                 return ret;
4206
4207         ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
4208         if (ret)
4209                 return ret;
4210
4211         org_tqp_num = h->kinfo.num_tqps;
4212         ret = h->ae_algo->ops->set_channels(h, new_tqp_num, rxfh_configured);
4213         if (ret) {
4214                 ret = h->ae_algo->ops->set_channels(h, org_tqp_num,
4215                                                     rxfh_configured);
4216                 if (ret) {
4217                         /* If revert to old tqp failed, fatal error occurred */
4218                         dev_err(&netdev->dev,
4219                                 "Revert to old tqp num fail, ret=%d", ret);
4220                         return ret;
4221                 }
4222                 dev_info(&netdev->dev,
4223                          "Change tqp num fail, Revert to old tqp num");
4224         }
4225         ret = hns3_reset_notify(h, HNAE3_INIT_CLIENT);
4226         if (ret)
4227                 return ret;
4228
4229         return hns3_reset_notify(h, HNAE3_UP_CLIENT);
4230 }
4231
4232 static const struct hnae3_client_ops client_ops = {
4233         .init_instance = hns3_client_init,
4234         .uninit_instance = hns3_client_uninit,
4235         .link_status_change = hns3_link_status_change,
4236         .setup_tc = hns3_client_setup_tc,
4237         .reset_notify = hns3_reset_notify,
4238 };
4239
4240 /* hns3_init_module - Driver registration routine
4241  * hns3_init_module is the first routine called when the driver is
4242  * loaded. All it does is register with the PCI subsystem.
4243  */
4244 static int __init hns3_init_module(void)
4245 {
4246         int ret;
4247
4248         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4249         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4250
4251         client.type = HNAE3_CLIENT_KNIC;
4252         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4253                  hns3_driver_name);
4254
4255         client.ops = &client_ops;
4256
4257         INIT_LIST_HEAD(&client.node);
4258
4259         hns3_dbg_register_debugfs(hns3_driver_name);
4260
4261         ret = hnae3_register_client(&client);
4262         if (ret)
4263                 goto err_reg_client;
4264
4265         ret = pci_register_driver(&hns3_driver);
4266         if (ret)
4267                 goto err_reg_driver;
4268
4269         return ret;
4270
4271 err_reg_driver:
4272         hnae3_unregister_client(&client);
4273 err_reg_client:
4274         hns3_dbg_unregister_debugfs();
4275         return ret;
4276 }
4277 module_init(hns3_init_module);
4278
4279 /* hns3_exit_module - Driver exit cleanup routine
4280  * hns3_exit_module is called just before the driver is removed
4281  * from memory.
4282  */
4283 static void __exit hns3_exit_module(void)
4284 {
4285         pci_unregister_driver(&hns3_driver);
4286         hnae3_unregister_client(&client);
4287         hns3_dbg_unregister_debugfs();
4288 }
4289 module_exit(hns3_exit_module);
4290
4291 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4292 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4293 MODULE_LICENSE("GPL");
4294 MODULE_ALIAS("pci:hns-nic");
4295 MODULE_VERSION(HNS3_MOD_VERSION);