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         u16 bdtp_fe_sc_vld_ra_ri = 0;
1033         struct skb_frag_struct *frag;
1034         unsigned int frag_buf_num;
1035         int k, sizeoflast;
1036         dma_addr_t dma;
1037
1038         if (type == DESC_TYPE_SKB) {
1039                 struct sk_buff *skb = (struct sk_buff *)priv;
1040                 u32 ol_type_vlan_len_msec = 0;
1041                 u32 type_cs_vlan_tso = 0;
1042                 u32 paylen = skb->len;
1043                 u16 inner_vtag = 0;
1044                 u16 out_vtag = 0;
1045                 u16 mss = 0;
1046                 int ret;
1047
1048                 ret = hns3_fill_desc_vtags(skb, ring, &type_cs_vlan_tso,
1049                                            &ol_type_vlan_len_msec,
1050                                            &inner_vtag, &out_vtag);
1051                 if (unlikely(ret))
1052                         return ret;
1053
1054                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1055                         u8 ol4_proto, il4_proto;
1056
1057                         skb_reset_mac_len(skb);
1058
1059                         ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
1060                         if (ret)
1061                                 return ret;
1062                         hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
1063                                             &type_cs_vlan_tso,
1064                                             &ol_type_vlan_len_msec);
1065                         ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
1066                                                       &type_cs_vlan_tso,
1067                                                       &ol_type_vlan_len_msec);
1068                         if (ret)
1069                                 return ret;
1070
1071                         ret = hns3_set_tso(skb, &paylen, &mss,
1072                                            &type_cs_vlan_tso);
1073                         if (ret)
1074                                 return ret;
1075                 }
1076
1077                 /* Set txbd */
1078                 desc->tx.ol_type_vlan_len_msec =
1079                         cpu_to_le32(ol_type_vlan_len_msec);
1080                 desc->tx.type_cs_vlan_tso_len =
1081                         cpu_to_le32(type_cs_vlan_tso);
1082                 desc->tx.paylen = cpu_to_le32(paylen);
1083                 desc->tx.mss = cpu_to_le16(mss);
1084                 desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
1085                 desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
1086
1087                 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1088         } else {
1089                 frag = (struct skb_frag_struct *)priv;
1090                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1091         }
1092
1093         if (dma_mapping_error(ring->dev, dma)) {
1094                 ring->stats.sw_err_cnt++;
1095                 return -ENOMEM;
1096         }
1097
1098         desc_cb->length = size;
1099
1100         frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) >> HNS3_MAX_BD_SIZE_OFFSET;
1101         sizeoflast = size & HNS3_TX_LAST_SIZE_M;
1102         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1103
1104         /* When frag size is bigger than hardware limit, split this frag */
1105         for (k = 0; k < frag_buf_num; k++) {
1106                 /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
1107                 desc_cb->priv = priv;
1108                 desc_cb->dma = dma + HNS3_MAX_BD_SIZE * k;
1109                 desc_cb->type = (type == DESC_TYPE_SKB && !k) ?
1110                                         DESC_TYPE_SKB : DESC_TYPE_PAGE;
1111
1112                 /* now, fill the descriptor */
1113                 desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
1114                 desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
1115                                 (u16)sizeoflast : (u16)HNS3_MAX_BD_SIZE);
1116                 hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri,
1117                                        frag_end && (k == frag_buf_num - 1) ?
1118                                                 1 : 0);
1119                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1120                                 cpu_to_le16(bdtp_fe_sc_vld_ra_ri);
1121
1122                 /* move ring pointer to next.*/
1123                 ring_ptr_move_fw(ring, next_to_use);
1124
1125                 desc_cb = &ring->desc_cb[ring->next_to_use];
1126                 desc = &ring->desc[ring->next_to_use];
1127         }
1128
1129         return 0;
1130 }
1131
1132 static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
1133                                    struct hns3_enet_ring *ring)
1134 {
1135         struct sk_buff *skb = *out_skb;
1136         struct sk_buff *new_skb = NULL;
1137         struct skb_frag_struct *frag;
1138         int bdnum_for_frag;
1139         int frag_num;
1140         int buf_num;
1141         int size;
1142         int i;
1143
1144         size = skb_headlen(skb);
1145         buf_num = (size + HNS3_MAX_BD_SIZE - 1) >> HNS3_MAX_BD_SIZE_OFFSET;
1146
1147         frag_num = skb_shinfo(skb)->nr_frags;
1148         for (i = 0; i < frag_num; i++) {
1149                 frag = &skb_shinfo(skb)->frags[i];
1150                 size = skb_frag_size(frag);
1151                 bdnum_for_frag = (size + HNS3_MAX_BD_SIZE - 1) >>
1152                                  HNS3_MAX_BD_SIZE_OFFSET;
1153                 if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
1154                         return -ENOMEM;
1155
1156                 buf_num += bdnum_for_frag;
1157         }
1158
1159         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1160                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) >>
1161                           HNS3_MAX_BD_SIZE_OFFSET;
1162                 if (ring_space(ring) < buf_num)
1163                         return -EBUSY;
1164                 /* manual split the send packet */
1165                 new_skb = skb_copy(skb, GFP_ATOMIC);
1166                 if (!new_skb)
1167                         return -ENOMEM;
1168                 dev_kfree_skb_any(skb);
1169                 *out_skb = new_skb;
1170         }
1171
1172         if (unlikely(ring_space(ring) < buf_num))
1173                 return -EBUSY;
1174
1175         *bnum = buf_num;
1176         return 0;
1177 }
1178
1179 static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
1180                                   struct hns3_enet_ring *ring)
1181 {
1182         struct sk_buff *skb = *out_skb;
1183         struct sk_buff *new_skb = NULL;
1184         int buf_num;
1185
1186         /* No. of segments (plus a header) */
1187         buf_num = skb_shinfo(skb)->nr_frags + 1;
1188
1189         if (unlikely(buf_num > HNS3_MAX_BD_PER_FRAG)) {
1190                 buf_num = (skb->len + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1191                 if (ring_space(ring) < buf_num)
1192                         return -EBUSY;
1193                 /* manual split the send packet */
1194                 new_skb = skb_copy(skb, GFP_ATOMIC);
1195                 if (!new_skb)
1196                         return -ENOMEM;
1197                 dev_kfree_skb_any(skb);
1198                 *out_skb = new_skb;
1199         }
1200
1201         if (unlikely(ring_space(ring) < buf_num))
1202                 return -EBUSY;
1203
1204         *bnum = buf_num;
1205
1206         return 0;
1207 }
1208
1209 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1210 {
1211         struct device *dev = ring_to_dev(ring);
1212         unsigned int i;
1213
1214         for (i = 0; i < ring->desc_num; i++) {
1215                 /* check if this is where we started */
1216                 if (ring->next_to_use == next_to_use_orig)
1217                         break;
1218
1219                 /* unmap the descriptor dma address */
1220                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1221                         dma_unmap_single(dev,
1222                                          ring->desc_cb[ring->next_to_use].dma,
1223                                         ring->desc_cb[ring->next_to_use].length,
1224                                         DMA_TO_DEVICE);
1225                 else if (ring->desc_cb[ring->next_to_use].length)
1226                         dma_unmap_page(dev,
1227                                        ring->desc_cb[ring->next_to_use].dma,
1228                                        ring->desc_cb[ring->next_to_use].length,
1229                                        DMA_TO_DEVICE);
1230
1231                 ring->desc_cb[ring->next_to_use].length = 0;
1232
1233                 /* rollback one */
1234                 ring_ptr_move_bw(ring, next_to_use);
1235         }
1236 }
1237
1238 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1239 {
1240         struct hns3_nic_priv *priv = netdev_priv(netdev);
1241         struct hns3_nic_ring_data *ring_data =
1242                 &tx_ring_data(priv, skb->queue_mapping);
1243         struct hns3_enet_ring *ring = ring_data->ring;
1244         struct netdev_queue *dev_queue;
1245         struct skb_frag_struct *frag;
1246         int next_to_use_head;
1247         int next_to_use_frag;
1248         int buf_num;
1249         int seg_num;
1250         int size;
1251         int ret;
1252         int i;
1253
1254         /* Prefetch the data used later */
1255         prefetch(skb->data);
1256
1257         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
1258         case -EBUSY:
1259                 u64_stats_update_begin(&ring->syncp);
1260                 ring->stats.tx_busy++;
1261                 u64_stats_update_end(&ring->syncp);
1262
1263                 goto out_net_tx_busy;
1264         case -ENOMEM:
1265                 u64_stats_update_begin(&ring->syncp);
1266                 ring->stats.sw_err_cnt++;
1267                 u64_stats_update_end(&ring->syncp);
1268                 netdev_err(netdev, "no memory to xmit!\n");
1269
1270                 goto out_err_tx_ok;
1271         default:
1272                 break;
1273         }
1274
1275         /* No. of segments (plus a header) */
1276         seg_num = skb_shinfo(skb)->nr_frags + 1;
1277         /* Fill the first part */
1278         size = skb_headlen(skb);
1279
1280         next_to_use_head = ring->next_to_use;
1281
1282         ret = priv->ops.fill_desc(ring, skb, size, seg_num == 1 ? 1 : 0,
1283                                   DESC_TYPE_SKB);
1284         if (ret)
1285                 goto head_fill_err;
1286
1287         next_to_use_frag = ring->next_to_use;
1288         /* Fill the fragments */
1289         for (i = 1; i < seg_num; i++) {
1290                 frag = &skb_shinfo(skb)->frags[i - 1];
1291                 size = skb_frag_size(frag);
1292
1293                 ret = priv->ops.fill_desc(ring, frag, size,
1294                                           seg_num - 1 == i ? 1 : 0,
1295                                           DESC_TYPE_PAGE);
1296
1297                 if (ret)
1298                         goto frag_fill_err;
1299         }
1300
1301         /* Complete translate all packets */
1302         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1303         netdev_tx_sent_queue(dev_queue, skb->len);
1304
1305         wmb(); /* Commit all data before submit */
1306
1307         hnae3_queue_xmit(ring->tqp, buf_num);
1308
1309         return NETDEV_TX_OK;
1310
1311 frag_fill_err:
1312         hns3_clear_desc(ring, next_to_use_frag);
1313
1314 head_fill_err:
1315         hns3_clear_desc(ring, next_to_use_head);
1316
1317 out_err_tx_ok:
1318         dev_kfree_skb_any(skb);
1319         return NETDEV_TX_OK;
1320
1321 out_net_tx_busy:
1322         netif_stop_subqueue(netdev, ring_data->queue_index);
1323         smp_mb(); /* Commit all data before submit */
1324
1325         return NETDEV_TX_BUSY;
1326 }
1327
1328 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1329 {
1330         struct hnae3_handle *h = hns3_get_handle(netdev);
1331         struct sockaddr *mac_addr = p;
1332         int ret;
1333
1334         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1335                 return -EADDRNOTAVAIL;
1336
1337         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1338                 netdev_info(netdev, "already using mac address %pM\n",
1339                             mac_addr->sa_data);
1340                 return 0;
1341         }
1342
1343         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1344         if (ret) {
1345                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1346                 return ret;
1347         }
1348
1349         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1350
1351         return 0;
1352 }
1353
1354 static int hns3_nic_do_ioctl(struct net_device *netdev,
1355                              struct ifreq *ifr, int cmd)
1356 {
1357         struct hnae3_handle *h = hns3_get_handle(netdev);
1358
1359         if (!netif_running(netdev))
1360                 return -EINVAL;
1361
1362         if (!h->ae_algo->ops->do_ioctl)
1363                 return -EOPNOTSUPP;
1364
1365         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1366 }
1367
1368 static int hns3_nic_set_features(struct net_device *netdev,
1369                                  netdev_features_t features)
1370 {
1371         netdev_features_t changed = netdev->features ^ features;
1372         struct hns3_nic_priv *priv = netdev_priv(netdev);
1373         struct hnae3_handle *h = priv->ae_handle;
1374         bool enable;
1375         int ret;
1376
1377         if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1378                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1379                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
1380                 else
1381                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
1382         }
1383
1384         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1385                 enable = !!(features & NETIF_F_GRO_HW);
1386                 ret = h->ae_algo->ops->set_gro_en(h, enable);
1387                 if (ret)
1388                         return ret;
1389         }
1390
1391         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1392             h->ae_algo->ops->enable_vlan_filter) {
1393                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_FILTER);
1394                 h->ae_algo->ops->enable_vlan_filter(h, enable);
1395         }
1396
1397         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1398             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1399                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
1400                 ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, enable);
1401                 if (ret)
1402                         return ret;
1403         }
1404
1405         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1406                 enable = !!(features & NETIF_F_NTUPLE);
1407                 h->ae_algo->ops->enable_fd(h, enable);
1408         }
1409
1410         netdev->features = features;
1411         return 0;
1412 }
1413
1414 static void hns3_nic_get_stats64(struct net_device *netdev,
1415                                  struct rtnl_link_stats64 *stats)
1416 {
1417         struct hns3_nic_priv *priv = netdev_priv(netdev);
1418         int queue_num = priv->ae_handle->kinfo.num_tqps;
1419         struct hnae3_handle *handle = priv->ae_handle;
1420         struct hns3_enet_ring *ring;
1421         u64 rx_length_errors = 0;
1422         u64 rx_crc_errors = 0;
1423         u64 rx_multicast = 0;
1424         unsigned int start;
1425         u64 tx_errors = 0;
1426         u64 rx_errors = 0;
1427         unsigned int idx;
1428         u64 tx_bytes = 0;
1429         u64 rx_bytes = 0;
1430         u64 tx_pkts = 0;
1431         u64 rx_pkts = 0;
1432         u64 tx_drop = 0;
1433         u64 rx_drop = 0;
1434
1435         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1436                 return;
1437
1438         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1439
1440         for (idx = 0; idx < queue_num; idx++) {
1441                 /* fetch the tx stats */
1442                 ring = priv->ring_data[idx].ring;
1443                 do {
1444                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1445                         tx_bytes += ring->stats.tx_bytes;
1446                         tx_pkts += ring->stats.tx_pkts;
1447                         tx_drop += ring->stats.sw_err_cnt;
1448                         tx_errors += ring->stats.sw_err_cnt;
1449                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1450
1451                 /* fetch the rx stats */
1452                 ring = priv->ring_data[idx + queue_num].ring;
1453                 do {
1454                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1455                         rx_bytes += ring->stats.rx_bytes;
1456                         rx_pkts += ring->stats.rx_pkts;
1457                         rx_drop += ring->stats.non_vld_descs;
1458                         rx_drop += ring->stats.l2_err;
1459                         rx_errors += ring->stats.non_vld_descs;
1460                         rx_errors += ring->stats.l2_err;
1461                         rx_crc_errors += ring->stats.l2_err;
1462                         rx_crc_errors += ring->stats.l3l4_csum_err;
1463                         rx_multicast += ring->stats.rx_multicast;
1464                         rx_length_errors += ring->stats.err_pkt_len;
1465                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1466         }
1467
1468         stats->tx_bytes = tx_bytes;
1469         stats->tx_packets = tx_pkts;
1470         stats->rx_bytes = rx_bytes;
1471         stats->rx_packets = rx_pkts;
1472
1473         stats->rx_errors = rx_errors;
1474         stats->multicast = rx_multicast;
1475         stats->rx_length_errors = rx_length_errors;
1476         stats->rx_crc_errors = rx_crc_errors;
1477         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1478
1479         stats->tx_errors = tx_errors;
1480         stats->rx_dropped = rx_drop;
1481         stats->tx_dropped = tx_drop;
1482         stats->collisions = netdev->stats.collisions;
1483         stats->rx_over_errors = netdev->stats.rx_over_errors;
1484         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1485         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1486         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1487         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1488         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1489         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1490         stats->tx_window_errors = netdev->stats.tx_window_errors;
1491         stats->rx_compressed = netdev->stats.rx_compressed;
1492         stats->tx_compressed = netdev->stats.tx_compressed;
1493 }
1494
1495 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1496 {
1497         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1498         struct hnae3_handle *h = hns3_get_handle(netdev);
1499         struct hnae3_knic_private_info *kinfo = &h->kinfo;
1500         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1501         u8 tc = mqprio_qopt->qopt.num_tc;
1502         u16 mode = mqprio_qopt->mode;
1503         u8 hw = mqprio_qopt->qopt.hw;
1504
1505         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1506                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1507                 return -EOPNOTSUPP;
1508
1509         if (tc > HNAE3_MAX_TC)
1510                 return -EINVAL;
1511
1512         if (!netdev)
1513                 return -EINVAL;
1514
1515         return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1516                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1517 }
1518
1519 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1520                              void *type_data)
1521 {
1522         if (type != TC_SETUP_QDISC_MQPRIO)
1523                 return -EOPNOTSUPP;
1524
1525         return hns3_setup_tc(dev, type_data);
1526 }
1527
1528 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1529                                 __be16 proto, u16 vid)
1530 {
1531         struct hnae3_handle *h = hns3_get_handle(netdev);
1532         struct hns3_nic_priv *priv = netdev_priv(netdev);
1533         int ret = -EIO;
1534
1535         if (h->ae_algo->ops->set_vlan_filter)
1536                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1537
1538         if (!ret)
1539                 set_bit(vid, priv->active_vlans);
1540
1541         return ret;
1542 }
1543
1544 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1545                                  __be16 proto, u16 vid)
1546 {
1547         struct hnae3_handle *h = hns3_get_handle(netdev);
1548         struct hns3_nic_priv *priv = netdev_priv(netdev);
1549         int ret = -EIO;
1550
1551         if (h->ae_algo->ops->set_vlan_filter)
1552                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1553
1554         if (!ret)
1555                 clear_bit(vid, priv->active_vlans);
1556
1557         return ret;
1558 }
1559
1560 static int hns3_restore_vlan(struct net_device *netdev)
1561 {
1562         struct hns3_nic_priv *priv = netdev_priv(netdev);
1563         int ret = 0;
1564         u16 vid;
1565
1566         for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
1567                 ret = hns3_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
1568                 if (ret) {
1569                         netdev_err(netdev, "Restore vlan: %d filter, ret:%d\n",
1570                                    vid, ret);
1571                         return ret;
1572                 }
1573         }
1574
1575         return ret;
1576 }
1577
1578 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1579                                 u8 qos, __be16 vlan_proto)
1580 {
1581         struct hnae3_handle *h = hns3_get_handle(netdev);
1582         int ret = -EIO;
1583
1584         if (h->ae_algo->ops->set_vf_vlan_filter)
1585                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1586                                                    qos, vlan_proto);
1587
1588         return ret;
1589 }
1590
1591 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1592 {
1593         struct hnae3_handle *h = hns3_get_handle(netdev);
1594         int ret;
1595
1596         if (!h->ae_algo->ops->set_mtu)
1597                 return -EOPNOTSUPP;
1598
1599         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1600         if (ret)
1601                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1602                            ret);
1603         else
1604                 netdev->mtu = new_mtu;
1605
1606         return ret;
1607 }
1608
1609 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1610 {
1611         struct hns3_nic_priv *priv = netdev_priv(ndev);
1612         struct hns3_enet_ring *tx_ring = NULL;
1613         int timeout_queue = 0;
1614         int hw_head, hw_tail;
1615         int i;
1616
1617         /* Find the stopped queue the same way the stack does */
1618         for (i = 0; i < ndev->real_num_tx_queues; i++) {
1619                 struct netdev_queue *q;
1620                 unsigned long trans_start;
1621
1622                 q = netdev_get_tx_queue(ndev, i);
1623                 trans_start = q->trans_start;
1624                 if (netif_xmit_stopped(q) &&
1625                     time_after(jiffies,
1626                                (trans_start + ndev->watchdog_timeo))) {
1627                         timeout_queue = i;
1628                         break;
1629                 }
1630         }
1631
1632         if (i == ndev->num_tx_queues) {
1633                 netdev_info(ndev,
1634                             "no netdev TX timeout queue found, timeout count: %llu\n",
1635                             priv->tx_timeout_count);
1636                 return false;
1637         }
1638
1639         tx_ring = priv->ring_data[timeout_queue].ring;
1640
1641         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1642                                 HNS3_RING_TX_RING_HEAD_REG);
1643         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1644                                 HNS3_RING_TX_RING_TAIL_REG);
1645         netdev_info(ndev,
1646                     "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",
1647                     priv->tx_timeout_count,
1648                     timeout_queue,
1649                     tx_ring->next_to_use,
1650                     tx_ring->next_to_clean,
1651                     hw_head,
1652                     hw_tail,
1653                     readl(tx_ring->tqp_vector->mask_addr));
1654
1655         return true;
1656 }
1657
1658 static void hns3_nic_net_timeout(struct net_device *ndev)
1659 {
1660         struct hns3_nic_priv *priv = netdev_priv(ndev);
1661         struct hnae3_handle *h = priv->ae_handle;
1662
1663         if (!hns3_get_tx_timeo_queue_info(ndev))
1664                 return;
1665
1666         priv->tx_timeout_count++;
1667
1668         /* request the reset, and let the hclge to determine
1669          * which reset level should be done
1670          */
1671         if (h->ae_algo->ops->reset_event)
1672                 h->ae_algo->ops->reset_event(h->pdev, h);
1673 }
1674
1675 static const struct net_device_ops hns3_nic_netdev_ops = {
1676         .ndo_open               = hns3_nic_net_open,
1677         .ndo_stop               = hns3_nic_net_stop,
1678         .ndo_start_xmit         = hns3_nic_net_xmit,
1679         .ndo_tx_timeout         = hns3_nic_net_timeout,
1680         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1681         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1682         .ndo_change_mtu         = hns3_nic_change_mtu,
1683         .ndo_set_features       = hns3_nic_set_features,
1684         .ndo_get_stats64        = hns3_nic_get_stats64,
1685         .ndo_setup_tc           = hns3_nic_setup_tc,
1686         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1687         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1688         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1689         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1690 };
1691
1692 static bool hns3_is_phys_func(struct pci_dev *pdev)
1693 {
1694         u32 dev_id = pdev->device;
1695
1696         switch (dev_id) {
1697         case HNAE3_DEV_ID_GE:
1698         case HNAE3_DEV_ID_25GE:
1699         case HNAE3_DEV_ID_25GE_RDMA:
1700         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1701         case HNAE3_DEV_ID_50GE_RDMA:
1702         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1703         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1704                 return true;
1705         case HNAE3_DEV_ID_100G_VF:
1706         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
1707                 return false;
1708         default:
1709                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
1710                          dev_id);
1711         }
1712
1713         return false;
1714 }
1715
1716 static void hns3_disable_sriov(struct pci_dev *pdev)
1717 {
1718         /* If our VFs are assigned we cannot shut down SR-IOV
1719          * without causing issues, so just leave the hardware
1720          * available but disabled
1721          */
1722         if (pci_vfs_assigned(pdev)) {
1723                 dev_warn(&pdev->dev,
1724                          "disabling driver while VFs are assigned\n");
1725                 return;
1726         }
1727
1728         pci_disable_sriov(pdev);
1729 }
1730
1731 static void hns3_get_dev_capability(struct pci_dev *pdev,
1732                                     struct hnae3_ae_dev *ae_dev)
1733 {
1734         if (pdev->revision >= 0x21) {
1735                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
1736                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
1737         }
1738 }
1739
1740 /* hns3_probe - Device initialization routine
1741  * @pdev: PCI device information struct
1742  * @ent: entry in hns3_pci_tbl
1743  *
1744  * hns3_probe initializes a PF identified by a pci_dev structure.
1745  * The OS initialization, configuring of the PF private structure,
1746  * and a hardware reset occur.
1747  *
1748  * Returns 0 on success, negative on failure
1749  */
1750 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1751 {
1752         struct hnae3_ae_dev *ae_dev;
1753         int ret;
1754
1755         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
1756                               GFP_KERNEL);
1757         if (!ae_dev) {
1758                 ret = -ENOMEM;
1759                 return ret;
1760         }
1761
1762         ae_dev->pdev = pdev;
1763         ae_dev->flag = ent->driver_data;
1764         ae_dev->dev_type = HNAE3_DEV_KNIC;
1765         ae_dev->reset_type = HNAE3_NONE_RESET;
1766         hns3_get_dev_capability(pdev, ae_dev);
1767         pci_set_drvdata(pdev, ae_dev);
1768
1769         ret = hnae3_register_ae_dev(ae_dev);
1770         if (ret) {
1771                 devm_kfree(&pdev->dev, ae_dev);
1772                 pci_set_drvdata(pdev, NULL);
1773         }
1774
1775         return ret;
1776 }
1777
1778 /* hns3_remove - Device removal routine
1779  * @pdev: PCI device information struct
1780  */
1781 static void hns3_remove(struct pci_dev *pdev)
1782 {
1783         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1784
1785         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
1786                 hns3_disable_sriov(pdev);
1787
1788         hnae3_unregister_ae_dev(ae_dev);
1789         pci_set_drvdata(pdev, NULL);
1790 }
1791
1792 /**
1793  * hns3_pci_sriov_configure
1794  * @pdev: pointer to a pci_dev structure
1795  * @num_vfs: number of VFs to allocate
1796  *
1797  * Enable or change the number of VFs. Called when the user updates the number
1798  * of VFs in sysfs.
1799  **/
1800 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
1801 {
1802         int ret;
1803
1804         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
1805                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
1806                 return -EINVAL;
1807         }
1808
1809         if (num_vfs) {
1810                 ret = pci_enable_sriov(pdev, num_vfs);
1811                 if (ret)
1812                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
1813                 else
1814                         return num_vfs;
1815         } else if (!pci_vfs_assigned(pdev)) {
1816                 pci_disable_sriov(pdev);
1817         } else {
1818                 dev_warn(&pdev->dev,
1819                          "Unable to free VFs because some are assigned to VMs.\n");
1820         }
1821
1822         return 0;
1823 }
1824
1825 static void hns3_shutdown(struct pci_dev *pdev)
1826 {
1827         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1828
1829         hnae3_unregister_ae_dev(ae_dev);
1830         devm_kfree(&pdev->dev, ae_dev);
1831         pci_set_drvdata(pdev, NULL);
1832
1833         if (system_state == SYSTEM_POWER_OFF)
1834                 pci_set_power_state(pdev, PCI_D3hot);
1835 }
1836
1837 static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
1838                                             pci_channel_state_t state)
1839 {
1840         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1841         pci_ers_result_t ret;
1842
1843         dev_info(&pdev->dev, "PCI error detected, state(=%d)!!\n", state);
1844
1845         if (state == pci_channel_io_perm_failure)
1846                 return PCI_ERS_RESULT_DISCONNECT;
1847
1848         if (!ae_dev) {
1849                 dev_err(&pdev->dev,
1850                         "Can't recover - error happened during device init\n");
1851                 return PCI_ERS_RESULT_NONE;
1852         }
1853
1854         if (ae_dev->ops->handle_hw_ras_error)
1855                 ret = ae_dev->ops->handle_hw_ras_error(ae_dev);
1856         else
1857                 return PCI_ERS_RESULT_NONE;
1858
1859         return ret;
1860 }
1861
1862 static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
1863 {
1864         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1865         struct device *dev = &pdev->dev;
1866
1867         dev_info(dev, "requesting reset due to PCI error\n");
1868
1869         /* request the reset */
1870         if (ae_dev->ops->reset_event) {
1871                 ae_dev->ops->reset_event(pdev, NULL);
1872                 return PCI_ERS_RESULT_RECOVERED;
1873         }
1874
1875         return PCI_ERS_RESULT_DISCONNECT;
1876 }
1877
1878 static void hns3_reset_prepare(struct pci_dev *pdev)
1879 {
1880         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1881
1882         dev_info(&pdev->dev, "hns3 flr prepare\n");
1883         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_prepare)
1884                 ae_dev->ops->flr_prepare(ae_dev);
1885 }
1886
1887 static void hns3_reset_done(struct pci_dev *pdev)
1888 {
1889         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1890
1891         dev_info(&pdev->dev, "hns3 flr done\n");
1892         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_done)
1893                 ae_dev->ops->flr_done(ae_dev);
1894 }
1895
1896 static const struct pci_error_handlers hns3_err_handler = {
1897         .error_detected = hns3_error_detected,
1898         .slot_reset     = hns3_slot_reset,
1899         .reset_prepare  = hns3_reset_prepare,
1900         .reset_done     = hns3_reset_done,
1901 };
1902
1903 static struct pci_driver hns3_driver = {
1904         .name     = hns3_driver_name,
1905         .id_table = hns3_pci_tbl,
1906         .probe    = hns3_probe,
1907         .remove   = hns3_remove,
1908         .shutdown = hns3_shutdown,
1909         .sriov_configure = hns3_pci_sriov_configure,
1910         .err_handler    = &hns3_err_handler,
1911 };
1912
1913 /* set default feature to hns3 */
1914 static void hns3_set_default_feature(struct net_device *netdev)
1915 {
1916         struct hnae3_handle *h = hns3_get_handle(netdev);
1917         struct pci_dev *pdev = h->pdev;
1918
1919         netdev->priv_flags |= IFF_UNICAST_FLT;
1920
1921         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1922                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1923                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1924                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1925                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1926
1927         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
1928
1929         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
1930
1931         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1932                 NETIF_F_HW_VLAN_CTAG_FILTER |
1933                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1934                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1935                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1936                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1937                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1938
1939         netdev->vlan_features |=
1940                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
1941                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
1942                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1943                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1944                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1945
1946         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1947                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1948                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1949                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1950                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1951                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1952
1953         if (pdev->revision >= 0x21) {
1954                 netdev->hw_features |= NETIF_F_GRO_HW;
1955                 netdev->features |= NETIF_F_GRO_HW;
1956
1957                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
1958                         netdev->hw_features |= NETIF_F_NTUPLE;
1959                         netdev->features |= NETIF_F_NTUPLE;
1960                 }
1961         }
1962 }
1963
1964 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
1965                              struct hns3_desc_cb *cb)
1966 {
1967         unsigned int order = hnae3_page_order(ring);
1968         struct page *p;
1969
1970         p = dev_alloc_pages(order);
1971         if (!p)
1972                 return -ENOMEM;
1973
1974         cb->priv = p;
1975         cb->page_offset = 0;
1976         cb->reuse_flag = 0;
1977         cb->buf  = page_address(p);
1978         cb->length = hnae3_page_size(ring);
1979         cb->type = DESC_TYPE_PAGE;
1980
1981         return 0;
1982 }
1983
1984 static void hns3_free_buffer(struct hns3_enet_ring *ring,
1985                              struct hns3_desc_cb *cb)
1986 {
1987         if (cb->type == DESC_TYPE_SKB)
1988                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
1989         else if (!HNAE3_IS_TX_RING(ring))
1990                 put_page((struct page *)cb->priv);
1991         memset(cb, 0, sizeof(*cb));
1992 }
1993
1994 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
1995 {
1996         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
1997                                cb->length, ring_to_dma_dir(ring));
1998
1999         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
2000                 return -EIO;
2001
2002         return 0;
2003 }
2004
2005 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
2006                               struct hns3_desc_cb *cb)
2007 {
2008         if (cb->type == DESC_TYPE_SKB)
2009                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
2010                                  ring_to_dma_dir(ring));
2011         else if (cb->length)
2012                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
2013                                ring_to_dma_dir(ring));
2014 }
2015
2016 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2017 {
2018         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2019         ring->desc[i].addr = 0;
2020 }
2021
2022 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2023 {
2024         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2025
2026         if (!ring->desc_cb[i].dma)
2027                 return;
2028
2029         hns3_buffer_detach(ring, i);
2030         hns3_free_buffer(ring, cb);
2031 }
2032
2033 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2034 {
2035         int i;
2036
2037         for (i = 0; i < ring->desc_num; i++)
2038                 hns3_free_buffer_detach(ring, i);
2039 }
2040
2041 /* free desc along with its attached buffer */
2042 static void hns3_free_desc(struct hns3_enet_ring *ring)
2043 {
2044         int size = ring->desc_num * sizeof(ring->desc[0]);
2045
2046         hns3_free_buffers(ring);
2047
2048         if (ring->desc) {
2049                 dma_free_coherent(ring_to_dev(ring), size,
2050                                   ring->desc, ring->desc_dma_addr);
2051                 ring->desc = NULL;
2052         }
2053 }
2054
2055 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2056 {
2057         int size = ring->desc_num * sizeof(ring->desc[0]);
2058
2059         ring->desc = dma_alloc_coherent(ring_to_dev(ring), size,
2060                                         &ring->desc_dma_addr, GFP_KERNEL);
2061         if (!ring->desc)
2062                 return -ENOMEM;
2063
2064         return 0;
2065 }
2066
2067 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
2068                                    struct hns3_desc_cb *cb)
2069 {
2070         int ret;
2071
2072         ret = hns3_alloc_buffer(ring, cb);
2073         if (ret)
2074                 goto out;
2075
2076         ret = hns3_map_buffer(ring, cb);
2077         if (ret)
2078                 goto out_with_buf;
2079
2080         return 0;
2081
2082 out_with_buf:
2083         hns3_free_buffer(ring, cb);
2084 out:
2085         return ret;
2086 }
2087
2088 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
2089 {
2090         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
2091
2092         if (ret)
2093                 return ret;
2094
2095         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2096
2097         return 0;
2098 }
2099
2100 /* Allocate memory for raw pkg, and map with dma */
2101 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2102 {
2103         int i, j, ret;
2104
2105         for (i = 0; i < ring->desc_num; i++) {
2106                 ret = hns3_alloc_buffer_attach(ring, i);
2107                 if (ret)
2108                         goto out_buffer_fail;
2109         }
2110
2111         return 0;
2112
2113 out_buffer_fail:
2114         for (j = i - 1; j >= 0; j--)
2115                 hns3_free_buffer_detach(ring, j);
2116         return ret;
2117 }
2118
2119 /* detach a in-used buffer and replace with a reserved one  */
2120 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2121                                 struct hns3_desc_cb *res_cb)
2122 {
2123         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2124         ring->desc_cb[i] = *res_cb;
2125         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2126         ring->desc[i].rx.bd_base_info = 0;
2127 }
2128
2129 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2130 {
2131         ring->desc_cb[i].reuse_flag = 0;
2132         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
2133                 + ring->desc_cb[i].page_offset);
2134         ring->desc[i].rx.bd_base_info = 0;
2135 }
2136
2137 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
2138                                       int *pkts)
2139 {
2140         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2141
2142         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2143         (*bytes) += desc_cb->length;
2144         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
2145         hns3_free_buffer_detach(ring, ring->next_to_clean);
2146
2147         ring_ptr_move_fw(ring, next_to_clean);
2148 }
2149
2150 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2151 {
2152         int u = ring->next_to_use;
2153         int c = ring->next_to_clean;
2154
2155         if (unlikely(h > ring->desc_num))
2156                 return 0;
2157
2158         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2159 }
2160
2161 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2162 {
2163         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2164         struct hns3_nic_priv *priv = netdev_priv(netdev);
2165         struct netdev_queue *dev_queue;
2166         int bytes, pkts;
2167         int head;
2168
2169         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2170         rmb(); /* Make sure head is ready before touch any data */
2171
2172         if (is_ring_empty(ring) || head == ring->next_to_clean)
2173                 return; /* no data to poll */
2174
2175         if (unlikely(!is_valid_clean_head(ring, head))) {
2176                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
2177                            ring->next_to_use, ring->next_to_clean);
2178
2179                 u64_stats_update_begin(&ring->syncp);
2180                 ring->stats.io_err_cnt++;
2181                 u64_stats_update_end(&ring->syncp);
2182                 return;
2183         }
2184
2185         bytes = 0;
2186         pkts = 0;
2187         while (head != ring->next_to_clean) {
2188                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2189                 /* Issue prefetch for next Tx descriptor */
2190                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2191         }
2192
2193         ring->tqp_vector->tx_group.total_bytes += bytes;
2194         ring->tqp_vector->tx_group.total_packets += pkts;
2195
2196         u64_stats_update_begin(&ring->syncp);
2197         ring->stats.tx_bytes += bytes;
2198         ring->stats.tx_pkts += pkts;
2199         u64_stats_update_end(&ring->syncp);
2200
2201         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2202         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2203
2204         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2205                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2206                 /* Make sure that anybody stopping the queue after this
2207                  * sees the new next_to_clean.
2208                  */
2209                 smp_mb();
2210                 if (netif_tx_queue_stopped(dev_queue) &&
2211                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2212                         netif_tx_wake_queue(dev_queue);
2213                         ring->stats.restart_queue++;
2214                 }
2215         }
2216 }
2217
2218 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2219 {
2220         int ntc = ring->next_to_clean;
2221         int ntu = ring->next_to_use;
2222
2223         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2224 }
2225
2226 static void
2227 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2228 {
2229         struct hns3_desc_cb *desc_cb;
2230         struct hns3_desc_cb res_cbs;
2231         int i, ret;
2232
2233         for (i = 0; i < cleand_count; i++) {
2234                 desc_cb = &ring->desc_cb[ring->next_to_use];
2235                 if (desc_cb->reuse_flag) {
2236                         u64_stats_update_begin(&ring->syncp);
2237                         ring->stats.reuse_pg_cnt++;
2238                         u64_stats_update_end(&ring->syncp);
2239
2240                         hns3_reuse_buffer(ring, ring->next_to_use);
2241                 } else {
2242                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2243                         if (ret) {
2244                                 u64_stats_update_begin(&ring->syncp);
2245                                 ring->stats.sw_err_cnt++;
2246                                 u64_stats_update_end(&ring->syncp);
2247
2248                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2249                                            "hnae reserve buffer map failed.\n");
2250                                 break;
2251                         }
2252                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2253                 }
2254
2255                 ring_ptr_move_fw(ring, next_to_use);
2256         }
2257
2258         wmb(); /* Make all data has been write before submit */
2259         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2260 }
2261
2262 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2263                                 struct hns3_enet_ring *ring, int pull_len,
2264                                 struct hns3_desc_cb *desc_cb)
2265 {
2266         struct hns3_desc *desc;
2267         u32 truesize;
2268         int size;
2269         int last_offset;
2270         bool twobufs;
2271
2272         twobufs = ((PAGE_SIZE < 8192) &&
2273                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2274
2275         desc = &ring->desc[ring->next_to_clean];
2276         size = le16_to_cpu(desc->rx.size);
2277
2278         truesize = hnae3_buf_size(ring);
2279
2280         if (!twobufs)
2281                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2282
2283         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2284                         size - pull_len, truesize);
2285
2286          /* Avoid re-using remote pages,flag default unreuse */
2287         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2288                 return;
2289
2290         if (twobufs) {
2291                 /* If we are only owner of page we can reuse it */
2292                 if (likely(page_count(desc_cb->priv) == 1)) {
2293                         /* Flip page offset to other buffer */
2294                         desc_cb->page_offset ^= truesize;
2295
2296                         desc_cb->reuse_flag = 1;
2297                         /* bump ref count on page before it is given*/
2298                         get_page(desc_cb->priv);
2299                 }
2300                 return;
2301         }
2302
2303         /* Move offset up to the next cache line */
2304         desc_cb->page_offset += truesize;
2305
2306         if (desc_cb->page_offset <= last_offset) {
2307                 desc_cb->reuse_flag = 1;
2308                 /* Bump ref count on page before it is given*/
2309                 get_page(desc_cb->priv);
2310         }
2311 }
2312
2313 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2314                              struct hns3_desc *desc)
2315 {
2316         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2317         int l3_type, l4_type;
2318         u32 bd_base_info;
2319         int ol4_type;
2320         u32 l234info;
2321
2322         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2323         l234info = le32_to_cpu(desc->rx.l234_info);
2324
2325         skb->ip_summed = CHECKSUM_NONE;
2326
2327         skb_checksum_none_assert(skb);
2328
2329         if (!(netdev->features & NETIF_F_RXCSUM))
2330                 return;
2331
2332         /* We MUST enable hardware checksum before enabling hardware GRO */
2333         if (skb_shinfo(skb)->gso_size) {
2334                 skb->ip_summed = CHECKSUM_UNNECESSARY;
2335                 return;
2336         }
2337
2338         /* check if hardware has done checksum */
2339         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2340                 return;
2341
2342         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2343                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2344                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2345                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2346                 u64_stats_update_begin(&ring->syncp);
2347                 ring->stats.l3l4_csum_err++;
2348                 u64_stats_update_end(&ring->syncp);
2349
2350                 return;
2351         }
2352
2353         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2354                                    HNS3_RXD_OL4ID_S);
2355         switch (ol4_type) {
2356         case HNS3_OL4_TYPE_MAC_IN_UDP:
2357         case HNS3_OL4_TYPE_NVGRE:
2358                 skb->csum_level = 1;
2359                 /* fall through */
2360         case HNS3_OL4_TYPE_NO_TUN:
2361                 l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2362                                           HNS3_RXD_L3ID_S);
2363                 l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2364                                           HNS3_RXD_L4ID_S);
2365
2366                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2367                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2368                      l3_type == HNS3_L3_TYPE_IPV6) &&
2369                     (l4_type == HNS3_L4_TYPE_UDP ||
2370                      l4_type == HNS3_L4_TYPE_TCP ||
2371                      l4_type == HNS3_L4_TYPE_SCTP))
2372                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2373                 break;
2374         default:
2375                 break;
2376         }
2377 }
2378
2379 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2380 {
2381         if (skb_has_frag_list(skb))
2382                 napi_gro_flush(&ring->tqp_vector->napi, false);
2383
2384         napi_gro_receive(&ring->tqp_vector->napi, skb);
2385 }
2386
2387 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2388                                 struct hns3_desc *desc, u32 l234info,
2389                                 u16 *vlan_tag)
2390 {
2391         struct pci_dev *pdev = ring->tqp->handle->pdev;
2392
2393         if (pdev->revision == 0x20) {
2394                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2395                 if (!(*vlan_tag & VLAN_VID_MASK))
2396                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2397
2398                 return (*vlan_tag != 0);
2399         }
2400
2401 #define HNS3_STRP_OUTER_VLAN    0x1
2402 #define HNS3_STRP_INNER_VLAN    0x2
2403
2404         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2405                                 HNS3_RXD_STRP_TAGP_S)) {
2406         case HNS3_STRP_OUTER_VLAN:
2407                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2408                 return true;
2409         case HNS3_STRP_INNER_VLAN:
2410                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2411                 return true;
2412         default:
2413                 return false;
2414         }
2415 }
2416
2417 static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
2418                           unsigned char *va)
2419 {
2420 #define HNS3_NEED_ADD_FRAG      1
2421         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2422         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2423         struct sk_buff *skb;
2424
2425         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2426         skb = ring->skb;
2427         if (unlikely(!skb)) {
2428                 netdev_err(netdev, "alloc rx skb fail\n");
2429
2430                 u64_stats_update_begin(&ring->syncp);
2431                 ring->stats.sw_err_cnt++;
2432                 u64_stats_update_end(&ring->syncp);
2433
2434                 return -ENOMEM;
2435         }
2436
2437         prefetchw(skb->data);
2438
2439         ring->pending_buf = 1;
2440         ring->frag_num = 0;
2441         ring->tail_skb = NULL;
2442         if (length <= HNS3_RX_HEAD_SIZE) {
2443                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2444
2445                 /* We can reuse buffer as-is, just make sure it is local */
2446                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2447                         desc_cb->reuse_flag = 1;
2448                 else /* This page cannot be reused so discard it */
2449                         put_page(desc_cb->priv);
2450
2451                 ring_ptr_move_fw(ring, next_to_clean);
2452                 return 0;
2453         }
2454         u64_stats_update_begin(&ring->syncp);
2455         ring->stats.seg_pkt_cnt++;
2456         u64_stats_update_end(&ring->syncp);
2457
2458         ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2459         __skb_put(skb, ring->pull_len);
2460         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2461                             desc_cb);
2462         ring_ptr_move_fw(ring, next_to_clean);
2463
2464         return HNS3_NEED_ADD_FRAG;
2465 }
2466
2467 static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
2468                          struct sk_buff **out_skb, bool pending)
2469 {
2470         struct sk_buff *skb = *out_skb;
2471         struct sk_buff *head_skb = *out_skb;
2472         struct sk_buff *new_skb;
2473         struct hns3_desc_cb *desc_cb;
2474         struct hns3_desc *pre_desc;
2475         u32 bd_base_info;
2476         int pre_bd;
2477
2478         /* if there is pending bd, the SW param next_to_clean has moved
2479          * to next and the next is NULL
2480          */
2481         if (pending) {
2482                 pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
2483                         ring->desc_num;
2484                 pre_desc = &ring->desc[pre_bd];
2485                 bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
2486         } else {
2487                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2488         }
2489
2490         while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2491                 desc = &ring->desc[ring->next_to_clean];
2492                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2493                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2494                 if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
2495                         return -ENXIO;
2496
2497                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2498                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2499                                                  HNS3_RX_HEAD_SIZE);
2500                         if (unlikely(!new_skb)) {
2501                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2502                                            "alloc rx skb frag fail\n");
2503                                 return -ENXIO;
2504                         }
2505                         ring->frag_num = 0;
2506
2507                         if (ring->tail_skb) {
2508                                 ring->tail_skb->next = new_skb;
2509                                 ring->tail_skb = new_skb;
2510                         } else {
2511                                 skb_shinfo(skb)->frag_list = new_skb;
2512                                 ring->tail_skb = new_skb;
2513                         }
2514                 }
2515
2516                 if (ring->tail_skb) {
2517                         head_skb->truesize += hnae3_buf_size(ring);
2518                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2519                         head_skb->len += le16_to_cpu(desc->rx.size);
2520                         skb = ring->tail_skb;
2521                 }
2522
2523                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2524                 ring_ptr_move_fw(ring, next_to_clean);
2525                 ring->pending_buf++;
2526         }
2527
2528         return 0;
2529 }
2530
2531 static void hns3_set_gro_param(struct sk_buff *skb, u32 l234info,
2532                                u32 bd_base_info)
2533 {
2534         u16 gro_count;
2535         u32 l3_type;
2536
2537         gro_count = hnae3_get_field(l234info, HNS3_RXD_GRO_COUNT_M,
2538                                     HNS3_RXD_GRO_COUNT_S);
2539         /* if there is no HW GRO, do not set gro params */
2540         if (!gro_count)
2541                 return;
2542
2543         /* tcp_gro_complete() will copy NAPI_GRO_CB(skb)->count
2544          * to skb_shinfo(skb)->gso_segs
2545          */
2546         NAPI_GRO_CB(skb)->count = gro_count;
2547
2548         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2549                                   HNS3_RXD_L3ID_S);
2550         if (l3_type == HNS3_L3_TYPE_IPV4)
2551                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2552         else if (l3_type == HNS3_L3_TYPE_IPV6)
2553                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2554         else
2555                 return;
2556
2557         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2558                                                     HNS3_RXD_GRO_SIZE_M,
2559                                                     HNS3_RXD_GRO_SIZE_S);
2560         if (skb_shinfo(skb)->gso_size)
2561                 tcp_gro_complete(skb);
2562 }
2563
2564 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2565                                      struct sk_buff *skb)
2566 {
2567         struct hnae3_handle *handle = ring->tqp->handle;
2568         enum pkt_hash_types rss_type;
2569         struct hns3_desc *desc;
2570         int last_bd;
2571
2572         /* When driver handle the rss type, ring->next_to_clean indicates the
2573          * first descriptor of next packet, need -1 here.
2574          */
2575         last_bd = (ring->next_to_clean - 1 + ring->desc_num) % ring->desc_num;
2576         desc = &ring->desc[last_bd];
2577
2578         if (le32_to_cpu(desc->rx.rss_hash))
2579                 rss_type = handle->kinfo.rss_type;
2580         else
2581                 rss_type = PKT_HASH_TYPE_NONE;
2582
2583         skb_set_hash(skb, le32_to_cpu(desc->rx.rss_hash), rss_type);
2584 }
2585
2586 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2587                              struct sk_buff **out_skb)
2588 {
2589         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2590         enum hns3_pkt_l2t_type l2_frame_type;
2591         struct sk_buff *skb = ring->skb;
2592         struct hns3_desc_cb *desc_cb;
2593         struct hns3_desc *desc;
2594         u32 bd_base_info;
2595         u32 l234info;
2596         int length;
2597         int ret;
2598
2599         desc = &ring->desc[ring->next_to_clean];
2600         desc_cb = &ring->desc_cb[ring->next_to_clean];
2601
2602         prefetch(desc);
2603
2604         length = le16_to_cpu(desc->rx.size);
2605         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2606
2607         /* Check valid BD */
2608         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2609                 return -ENXIO;
2610
2611         if (!skb)
2612                 ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2613
2614         /* Prefetch first cache line of first page
2615          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2616          * line size is 64B so need to prefetch twice to make it 128B. But in
2617          * actual we can have greater size of caches with 128B Level 1 cache
2618          * lines. In such a case, single fetch would suffice to cache in the
2619          * relevant part of the header.
2620          */
2621         prefetch(ring->va);
2622 #if L1_CACHE_BYTES < 128
2623         prefetch(ring->va + L1_CACHE_BYTES);
2624 #endif
2625
2626         if (!skb) {
2627                 ret = hns3_alloc_skb(ring, length, ring->va);
2628                 *out_skb = skb = ring->skb;
2629
2630                 if (ret < 0) /* alloc buffer fail */
2631                         return ret;
2632                 if (ret > 0) { /* need add frag */
2633                         ret = hns3_add_frag(ring, desc, &skb, false);
2634                         if (ret)
2635                                 return ret;
2636
2637                         /* As the head data may be changed when GRO enable, copy
2638                          * the head data in after other data rx completed
2639                          */
2640                         memcpy(skb->data, ring->va,
2641                                ALIGN(ring->pull_len, sizeof(long)));
2642                 }
2643         } else {
2644                 ret = hns3_add_frag(ring, desc, &skb, true);
2645                 if (ret)
2646                         return ret;
2647
2648                 /* As the head data may be changed when GRO enable, copy
2649                  * the head data in after other data rx completed
2650                  */
2651                 memcpy(skb->data, ring->va,
2652                        ALIGN(ring->pull_len, sizeof(long)));
2653         }
2654
2655         l234info = le32_to_cpu(desc->rx.l234_info);
2656         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2657
2658         /* Based on hw strategy, the tag offloaded will be stored at
2659          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2660          * in one layer tag case.
2661          */
2662         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2663                 u16 vlan_tag;
2664
2665                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
2666                         __vlan_hwaccel_put_tag(skb,
2667                                                htons(ETH_P_8021Q),
2668                                                vlan_tag);
2669         }
2670
2671         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2672                 u64_stats_update_begin(&ring->syncp);
2673                 ring->stats.non_vld_descs++;
2674                 u64_stats_update_end(&ring->syncp);
2675
2676                 dev_kfree_skb_any(skb);
2677                 return -EINVAL;
2678         }
2679
2680         if (unlikely((!desc->rx.pkt_len) ||
2681                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2682                 u64_stats_update_begin(&ring->syncp);
2683                 ring->stats.err_pkt_len++;
2684                 u64_stats_update_end(&ring->syncp);
2685
2686                 dev_kfree_skb_any(skb);
2687                 return -EFAULT;
2688         }
2689
2690         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2691                 u64_stats_update_begin(&ring->syncp);
2692                 ring->stats.l2_err++;
2693                 u64_stats_update_end(&ring->syncp);
2694
2695                 dev_kfree_skb_any(skb);
2696                 return -EFAULT;
2697         }
2698
2699         l2_frame_type = hnae3_get_field(l234info, HNS3_RXD_DMAC_M,
2700                                         HNS3_RXD_DMAC_S);
2701         u64_stats_update_begin(&ring->syncp);
2702         if (l2_frame_type == HNS3_L2_TYPE_MULTICAST)
2703                 ring->stats.rx_multicast++;
2704
2705         ring->stats.rx_pkts++;
2706         ring->stats.rx_bytes += skb->len;
2707         u64_stats_update_end(&ring->syncp);
2708
2709         ring->tqp_vector->rx_group.total_bytes += skb->len;
2710
2711         /* This is needed in order to enable forwarding support */
2712         hns3_set_gro_param(skb, l234info, bd_base_info);
2713
2714         hns3_rx_checksum(ring, skb, desc);
2715         *out_skb = skb;
2716         hns3_set_rx_skb_rss_type(ring, skb);
2717
2718         return 0;
2719 }
2720
2721 int hns3_clean_rx_ring(
2722                 struct hns3_enet_ring *ring, int budget,
2723                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2724 {
2725 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2726         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2727         int recv_pkts, recv_bds, clean_count, err;
2728         int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
2729         struct sk_buff *skb = ring->skb;
2730         int num;
2731
2732         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2733         rmb(); /* Make sure num taken effect before the other data is touched */
2734
2735         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2736         num -= unused_count;
2737
2738         while (recv_pkts < budget && recv_bds < num) {
2739                 /* Reuse or realloc buffers */
2740                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2741                         hns3_nic_alloc_rx_buffers(ring,
2742                                                   clean_count + unused_count);
2743                         clean_count = 0;
2744                         unused_count = hns3_desc_unused(ring) -
2745                                         ring->pending_buf;
2746                 }
2747
2748                 /* Poll one pkt */
2749                 err = hns3_handle_rx_bd(ring, &skb);
2750                 if (unlikely(!skb)) /* This fault cannot be repaired */
2751                         goto out;
2752
2753                 if (err == -ENXIO) { /* Do not get FE for the packet */
2754                         goto out;
2755                 } else if (unlikely(err)) {  /* Do jump the err */
2756                         recv_bds += ring->pending_buf;
2757                         clean_count += ring->pending_buf;
2758                         ring->skb = NULL;
2759                         ring->pending_buf = 0;
2760                         continue;
2761                 }
2762
2763                 /* Do update ip stack process */
2764                 skb->protocol = eth_type_trans(skb, netdev);
2765                 rx_fn(ring, skb);
2766                 recv_bds += ring->pending_buf;
2767                 clean_count += ring->pending_buf;
2768                 ring->skb = NULL;
2769                 ring->pending_buf = 0;
2770
2771                 recv_pkts++;
2772         }
2773
2774 out:
2775         /* Make all data has been write before submit */
2776         if (clean_count + unused_count > 0)
2777                 hns3_nic_alloc_rx_buffers(ring,
2778                                           clean_count + unused_count);
2779
2780         return recv_pkts;
2781 }
2782
2783 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2784 {
2785         struct hns3_enet_tqp_vector *tqp_vector =
2786                                         ring_group->ring->tqp_vector;
2787         enum hns3_flow_level_range new_flow_level;
2788         int packets_per_msecs;
2789         int bytes_per_msecs;
2790         u32 time_passed_ms;
2791         u16 new_int_gl;
2792
2793         if (!tqp_vector->last_jiffies)
2794                 return false;
2795
2796         if (ring_group->total_packets == 0) {
2797                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2798                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2799                 return true;
2800         }
2801
2802         /* Simple throttlerate management
2803          * 0-10MB/s   lower     (50000 ints/s)
2804          * 10-20MB/s   middle    (20000 ints/s)
2805          * 20-1249MB/s high      (18000 ints/s)
2806          * > 40000pps  ultra     (8000 ints/s)
2807          */
2808         new_flow_level = ring_group->coal.flow_level;
2809         new_int_gl = ring_group->coal.int_gl;
2810         time_passed_ms =
2811                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2812
2813         if (!time_passed_ms)
2814                 return false;
2815
2816         do_div(ring_group->total_packets, time_passed_ms);
2817         packets_per_msecs = ring_group->total_packets;
2818
2819         do_div(ring_group->total_bytes, time_passed_ms);
2820         bytes_per_msecs = ring_group->total_bytes;
2821
2822 #define HNS3_RX_LOW_BYTE_RATE 10000
2823 #define HNS3_RX_MID_BYTE_RATE 20000
2824
2825         switch (new_flow_level) {
2826         case HNS3_FLOW_LOW:
2827                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2828                         new_flow_level = HNS3_FLOW_MID;
2829                 break;
2830         case HNS3_FLOW_MID:
2831                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2832                         new_flow_level = HNS3_FLOW_HIGH;
2833                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2834                         new_flow_level = HNS3_FLOW_LOW;
2835                 break;
2836         case HNS3_FLOW_HIGH:
2837         case HNS3_FLOW_ULTRA:
2838         default:
2839                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2840                         new_flow_level = HNS3_FLOW_MID;
2841                 break;
2842         }
2843
2844 #define HNS3_RX_ULTRA_PACKET_RATE 40
2845
2846         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2847             &tqp_vector->rx_group == ring_group)
2848                 new_flow_level = HNS3_FLOW_ULTRA;
2849
2850         switch (new_flow_level) {
2851         case HNS3_FLOW_LOW:
2852                 new_int_gl = HNS3_INT_GL_50K;
2853                 break;
2854         case HNS3_FLOW_MID:
2855                 new_int_gl = HNS3_INT_GL_20K;
2856                 break;
2857         case HNS3_FLOW_HIGH:
2858                 new_int_gl = HNS3_INT_GL_18K;
2859                 break;
2860         case HNS3_FLOW_ULTRA:
2861                 new_int_gl = HNS3_INT_GL_8K;
2862                 break;
2863         default:
2864                 break;
2865         }
2866
2867         ring_group->total_bytes = 0;
2868         ring_group->total_packets = 0;
2869         ring_group->coal.flow_level = new_flow_level;
2870         if (new_int_gl != ring_group->coal.int_gl) {
2871                 ring_group->coal.int_gl = new_int_gl;
2872                 return true;
2873         }
2874         return false;
2875 }
2876
2877 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2878 {
2879         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2880         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2881         bool rx_update, tx_update;
2882
2883         /* update param every 1000ms */
2884         if (time_before(jiffies,
2885                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
2886                 return;
2887
2888         if (rx_group->coal.gl_adapt_enable) {
2889                 rx_update = hns3_get_new_int_gl(rx_group);
2890                 if (rx_update)
2891                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2892                                                        rx_group->coal.int_gl);
2893         }
2894
2895         if (tx_group->coal.gl_adapt_enable) {
2896                 tx_update = hns3_get_new_int_gl(tx_group);
2897                 if (tx_update)
2898                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2899                                                        tx_group->coal.int_gl);
2900         }
2901
2902         tqp_vector->last_jiffies = jiffies;
2903 }
2904
2905 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2906 {
2907         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
2908         struct hns3_enet_ring *ring;
2909         int rx_pkt_total = 0;
2910
2911         struct hns3_enet_tqp_vector *tqp_vector =
2912                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2913         bool clean_complete = true;
2914         int rx_budget;
2915
2916         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2917                 napi_complete(napi);
2918                 return 0;
2919         }
2920
2921         /* Since the actual Tx work is minimal, we can give the Tx a larger
2922          * budget and be more aggressive about cleaning up the Tx descriptors.
2923          */
2924         hns3_for_each_ring(ring, tqp_vector->tx_group)
2925                 hns3_clean_tx_ring(ring);
2926
2927         /* make sure rx ring budget not smaller than 1 */
2928         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2929
2930         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2931                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2932                                                     hns3_rx_skb);
2933
2934                 if (rx_cleaned >= rx_budget)
2935                         clean_complete = false;
2936
2937                 rx_pkt_total += rx_cleaned;
2938         }
2939
2940         tqp_vector->rx_group.total_packets += rx_pkt_total;
2941
2942         if (!clean_complete)
2943                 return budget;
2944
2945         if (napi_complete(napi) &&
2946             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
2947                 hns3_update_new_int_gl(tqp_vector);
2948                 hns3_mask_vector_irq(tqp_vector, 1);
2949         }
2950
2951         return rx_pkt_total;
2952 }
2953
2954 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2955                                       struct hnae3_ring_chain_node *head)
2956 {
2957         struct pci_dev *pdev = tqp_vector->handle->pdev;
2958         struct hnae3_ring_chain_node *cur_chain = head;
2959         struct hnae3_ring_chain_node *chain;
2960         struct hns3_enet_ring *tx_ring;
2961         struct hns3_enet_ring *rx_ring;
2962
2963         tx_ring = tqp_vector->tx_group.ring;
2964         if (tx_ring) {
2965                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2966                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2967                               HNAE3_RING_TYPE_TX);
2968                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2969                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2970
2971                 cur_chain->next = NULL;
2972
2973                 while (tx_ring->next) {
2974                         tx_ring = tx_ring->next;
2975
2976                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2977                                              GFP_KERNEL);
2978                         if (!chain)
2979                                 goto err_free_chain;
2980
2981                         cur_chain->next = chain;
2982                         chain->tqp_index = tx_ring->tqp->tqp_index;
2983                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2984                                       HNAE3_RING_TYPE_TX);
2985                         hnae3_set_field(chain->int_gl_idx,
2986                                         HNAE3_RING_GL_IDX_M,
2987                                         HNAE3_RING_GL_IDX_S,
2988                                         HNAE3_RING_GL_TX);
2989
2990                         cur_chain = chain;
2991                 }
2992         }
2993
2994         rx_ring = tqp_vector->rx_group.ring;
2995         if (!tx_ring && rx_ring) {
2996                 cur_chain->next = NULL;
2997                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
2998                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2999                               HNAE3_RING_TYPE_RX);
3000                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3001                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3002
3003                 rx_ring = rx_ring->next;
3004         }
3005
3006         while (rx_ring) {
3007                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
3008                 if (!chain)
3009                         goto err_free_chain;
3010
3011                 cur_chain->next = chain;
3012                 chain->tqp_index = rx_ring->tqp->tqp_index;
3013                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3014                               HNAE3_RING_TYPE_RX);
3015                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3016                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3017
3018                 cur_chain = chain;
3019
3020                 rx_ring = rx_ring->next;
3021         }
3022
3023         return 0;
3024
3025 err_free_chain:
3026         cur_chain = head->next;
3027         while (cur_chain) {
3028                 chain = cur_chain->next;
3029                 devm_kfree(&pdev->dev, cur_chain);
3030                 cur_chain = chain;
3031         }
3032         head->next = NULL;
3033
3034         return -ENOMEM;
3035 }
3036
3037 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3038                                         struct hnae3_ring_chain_node *head)
3039 {
3040         struct pci_dev *pdev = tqp_vector->handle->pdev;
3041         struct hnae3_ring_chain_node *chain_tmp, *chain;
3042
3043         chain = head->next;
3044
3045         while (chain) {
3046                 chain_tmp = chain->next;
3047                 devm_kfree(&pdev->dev, chain);
3048                 chain = chain_tmp;
3049         }
3050 }
3051
3052 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3053                                    struct hns3_enet_ring *ring)
3054 {
3055         ring->next = group->ring;
3056         group->ring = ring;
3057
3058         group->count++;
3059 }
3060
3061 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3062 {
3063         struct pci_dev *pdev = priv->ae_handle->pdev;
3064         struct hns3_enet_tqp_vector *tqp_vector;
3065         int num_vectors = priv->vector_num;
3066         int numa_node;
3067         int vector_i;
3068
3069         numa_node = dev_to_node(&pdev->dev);
3070
3071         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3072                 tqp_vector = &priv->tqp_vector[vector_i];
3073                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3074                                 &tqp_vector->affinity_mask);
3075         }
3076 }
3077
3078 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3079 {
3080         struct hnae3_ring_chain_node vector_ring_chain;
3081         struct hnae3_handle *h = priv->ae_handle;
3082         struct hns3_enet_tqp_vector *tqp_vector;
3083         int ret = 0;
3084         int i;
3085
3086         hns3_nic_set_cpumask(priv);
3087
3088         for (i = 0; i < priv->vector_num; i++) {
3089                 tqp_vector = &priv->tqp_vector[i];
3090                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3091                 tqp_vector->num_tqps = 0;
3092         }
3093
3094         for (i = 0; i < h->kinfo.num_tqps; i++) {
3095                 u16 vector_i = i % priv->vector_num;
3096                 u16 tqp_num = h->kinfo.num_tqps;
3097
3098                 tqp_vector = &priv->tqp_vector[vector_i];
3099
3100                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3101                                        priv->ring_data[i].ring);
3102
3103                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3104                                        priv->ring_data[i + tqp_num].ring);
3105
3106                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
3107                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
3108                 tqp_vector->num_tqps++;
3109         }
3110
3111         for (i = 0; i < priv->vector_num; i++) {
3112                 tqp_vector = &priv->tqp_vector[i];
3113
3114                 tqp_vector->rx_group.total_bytes = 0;
3115                 tqp_vector->rx_group.total_packets = 0;
3116                 tqp_vector->tx_group.total_bytes = 0;
3117                 tqp_vector->tx_group.total_packets = 0;
3118                 tqp_vector->handle = h;
3119
3120                 ret = hns3_get_vector_ring_chain(tqp_vector,
3121                                                  &vector_ring_chain);
3122                 if (ret)
3123                         goto map_ring_fail;
3124
3125                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3126                         tqp_vector->vector_irq, &vector_ring_chain);
3127
3128                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3129
3130                 if (ret)
3131                         goto map_ring_fail;
3132
3133                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3134                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3135         }
3136
3137         return 0;
3138
3139 map_ring_fail:
3140         while (i--)
3141                 netif_napi_del(&priv->tqp_vector[i].napi);
3142
3143         return ret;
3144 }
3145
3146 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3147 {
3148 #define HNS3_VECTOR_PF_MAX_NUM          64
3149
3150         struct hnae3_handle *h = priv->ae_handle;
3151         struct hns3_enet_tqp_vector *tqp_vector;
3152         struct hnae3_vector_info *vector;
3153         struct pci_dev *pdev = h->pdev;
3154         u16 tqp_num = h->kinfo.num_tqps;
3155         u16 vector_num;
3156         int ret = 0;
3157         u16 i;
3158
3159         /* RSS size, cpu online and vector_num should be the same */
3160         /* Should consider 2p/4p later */
3161         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3162         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3163
3164         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3165                               GFP_KERNEL);
3166         if (!vector)
3167                 return -ENOMEM;
3168
3169         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3170
3171         priv->vector_num = vector_num;
3172         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3173                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3174                              GFP_KERNEL);
3175         if (!priv->tqp_vector) {
3176                 ret = -ENOMEM;
3177                 goto out;
3178         }
3179
3180         for (i = 0; i < priv->vector_num; i++) {
3181                 tqp_vector = &priv->tqp_vector[i];
3182                 tqp_vector->idx = i;
3183                 tqp_vector->mask_addr = vector[i].io_addr;
3184                 tqp_vector->vector_irq = vector[i].vector;
3185                 hns3_vector_gl_rl_init(tqp_vector, priv);
3186         }
3187
3188 out:
3189         devm_kfree(&pdev->dev, vector);
3190         return ret;
3191 }
3192
3193 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3194 {
3195         group->ring = NULL;
3196         group->count = 0;
3197 }
3198
3199 static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3200 {
3201         struct hnae3_ring_chain_node vector_ring_chain;
3202         struct hnae3_handle *h = priv->ae_handle;
3203         struct hns3_enet_tqp_vector *tqp_vector;
3204         int i;
3205
3206         for (i = 0; i < priv->vector_num; i++) {
3207                 tqp_vector = &priv->tqp_vector[i];
3208
3209                 if (!tqp_vector->rx_group.ring && !tqp_vector->tx_group.ring)
3210                         continue;
3211
3212                 hns3_get_vector_ring_chain(tqp_vector, &vector_ring_chain);
3213
3214                 h->ae_algo->ops->unmap_ring_from_vector(h,
3215                         tqp_vector->vector_irq, &vector_ring_chain);
3216
3217                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3218
3219                 if (tqp_vector->irq_init_flag == HNS3_VECTOR_INITED) {
3220                         irq_set_affinity_notifier(tqp_vector->vector_irq,
3221                                                   NULL);
3222                         irq_set_affinity_hint(tqp_vector->vector_irq, NULL);
3223                         free_irq(tqp_vector->vector_irq, tqp_vector);
3224                         tqp_vector->irq_init_flag = HNS3_VECTOR_NOT_INITED;
3225                 }
3226
3227                 hns3_clear_ring_group(&tqp_vector->rx_group);
3228                 hns3_clear_ring_group(&tqp_vector->tx_group);
3229                 netif_napi_del(&priv->tqp_vector[i].napi);
3230         }
3231 }
3232
3233 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3234 {
3235         struct hnae3_handle *h = priv->ae_handle;
3236         struct pci_dev *pdev = h->pdev;
3237         int i, ret;
3238
3239         for (i = 0; i < priv->vector_num; i++) {
3240                 struct hns3_enet_tqp_vector *tqp_vector;
3241
3242                 tqp_vector = &priv->tqp_vector[i];
3243                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3244                 if (ret)
3245                         return ret;
3246         }
3247
3248         devm_kfree(&pdev->dev, priv->tqp_vector);
3249         return 0;
3250 }
3251
3252 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3253                              int ring_type)
3254 {
3255         struct hns3_nic_ring_data *ring_data = priv->ring_data;
3256         int queue_num = priv->ae_handle->kinfo.num_tqps;
3257         int desc_num = priv->ae_handle->kinfo.num_desc;
3258         struct pci_dev *pdev = priv->ae_handle->pdev;
3259         struct hns3_enet_ring *ring;
3260
3261         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
3262         if (!ring)
3263                 return -ENOMEM;
3264
3265         if (ring_type == HNAE3_RING_TYPE_TX) {
3266                 ring_data[q->tqp_index].ring = ring;
3267                 ring_data[q->tqp_index].queue_index = q->tqp_index;
3268                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3269         } else {
3270                 ring_data[q->tqp_index + queue_num].ring = ring;
3271                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
3272                 ring->io_base = q->io_base;
3273         }
3274
3275         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3276
3277         ring->tqp = q;
3278         ring->desc = NULL;
3279         ring->desc_cb = NULL;
3280         ring->dev = priv->dev;
3281         ring->desc_dma_addr = 0;
3282         ring->buf_size = q->buf_size;
3283         ring->desc_num = desc_num;
3284         ring->next_to_use = 0;
3285         ring->next_to_clean = 0;
3286
3287         return 0;
3288 }
3289
3290 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
3291                               struct hns3_nic_priv *priv)
3292 {
3293         int ret;
3294
3295         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3296         if (ret)
3297                 return ret;
3298
3299         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3300         if (ret) {
3301                 devm_kfree(priv->dev, priv->ring_data[tqp->tqp_index].ring);
3302                 return ret;
3303         }
3304
3305         return 0;
3306 }
3307
3308 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3309 {
3310         struct hnae3_handle *h = priv->ae_handle;
3311         struct pci_dev *pdev = h->pdev;
3312         int i, ret;
3313
3314         priv->ring_data =  devm_kzalloc(&pdev->dev,
3315                                         array3_size(h->kinfo.num_tqps,
3316                                                     sizeof(*priv->ring_data),
3317                                                     2),
3318                                         GFP_KERNEL);
3319         if (!priv->ring_data)
3320                 return -ENOMEM;
3321
3322         for (i = 0; i < h->kinfo.num_tqps; i++) {
3323                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3324                 if (ret)
3325                         goto err;
3326         }
3327
3328         return 0;
3329 err:
3330         while (i--) {
3331                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3332                 devm_kfree(priv->dev,
3333                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3334         }
3335
3336         devm_kfree(&pdev->dev, priv->ring_data);
3337         return ret;
3338 }
3339
3340 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3341 {
3342         struct hnae3_handle *h = priv->ae_handle;
3343         int i;
3344
3345         for (i = 0; i < h->kinfo.num_tqps; i++) {
3346                 devm_kfree(priv->dev, priv->ring_data[i].ring);
3347                 devm_kfree(priv->dev,
3348                            priv->ring_data[i + h->kinfo.num_tqps].ring);
3349         }
3350         devm_kfree(priv->dev, priv->ring_data);
3351 }
3352
3353 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3354 {
3355         int ret;
3356
3357         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3358                 return -EINVAL;
3359
3360         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
3361                                 GFP_KERNEL);
3362         if (!ring->desc_cb) {
3363                 ret = -ENOMEM;
3364                 goto out;
3365         }
3366
3367         ret = hns3_alloc_desc(ring);
3368         if (ret)
3369                 goto out_with_desc_cb;
3370
3371         if (!HNAE3_IS_TX_RING(ring)) {
3372                 ret = hns3_alloc_ring_buffers(ring);
3373                 if (ret)
3374                         goto out_with_desc;
3375         }
3376
3377         return 0;
3378
3379 out_with_desc:
3380         hns3_free_desc(ring);
3381 out_with_desc_cb:
3382         kfree(ring->desc_cb);
3383         ring->desc_cb = NULL;
3384 out:
3385         return ret;
3386 }
3387
3388 static void hns3_fini_ring(struct hns3_enet_ring *ring)
3389 {
3390         hns3_free_desc(ring);
3391         kfree(ring->desc_cb);
3392         ring->desc_cb = NULL;
3393         ring->next_to_clean = 0;
3394         ring->next_to_use = 0;
3395         ring->pending_buf = 0;
3396         if (ring->skb) {
3397                 dev_kfree_skb_any(ring->skb);
3398                 ring->skb = NULL;
3399         }
3400 }
3401
3402 static int hns3_buf_size2type(u32 buf_size)
3403 {
3404         int bd_size_type;
3405
3406         switch (buf_size) {
3407         case 512:
3408                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3409                 break;
3410         case 1024:
3411                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3412                 break;
3413         case 2048:
3414                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3415                 break;
3416         case 4096:
3417                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3418                 break;
3419         default:
3420                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3421         }
3422
3423         return bd_size_type;
3424 }
3425
3426 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3427 {
3428         dma_addr_t dma = ring->desc_dma_addr;
3429         struct hnae3_queue *q = ring->tqp;
3430
3431         if (!HNAE3_IS_TX_RING(ring)) {
3432                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3433                                (u32)dma);
3434                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3435                                (u32)((dma >> 31) >> 1));
3436
3437                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3438                                hns3_buf_size2type(ring->buf_size));
3439                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3440                                ring->desc_num / 8 - 1);
3441
3442         } else {
3443                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3444                                (u32)dma);
3445                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3446                                (u32)((dma >> 31) >> 1));
3447
3448                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3449                                ring->desc_num / 8 - 1);
3450         }
3451 }
3452
3453 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3454 {
3455         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3456         int i;
3457
3458         for (i = 0; i < HNAE3_MAX_TC; i++) {
3459                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3460                 int j;
3461
3462                 if (!tc_info->enable)
3463                         continue;
3464
3465                 for (j = 0; j < tc_info->tqp_count; j++) {
3466                         struct hnae3_queue *q;
3467
3468                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3469                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3470                                        tc_info->tc);
3471                 }
3472         }
3473 }
3474
3475 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3476 {
3477         struct hnae3_handle *h = priv->ae_handle;
3478         int ring_num = h->kinfo.num_tqps * 2;
3479         int i, j;
3480         int ret;
3481
3482         for (i = 0; i < ring_num; i++) {
3483                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3484                 if (ret) {
3485                         dev_err(priv->dev,
3486                                 "Alloc ring memory fail! ret=%d\n", ret);
3487                         goto out_when_alloc_ring_memory;
3488                 }
3489
3490                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3491         }
3492
3493         return 0;
3494
3495 out_when_alloc_ring_memory:
3496         for (j = i - 1; j >= 0; j--)
3497                 hns3_fini_ring(priv->ring_data[j].ring);
3498
3499         return -ENOMEM;
3500 }
3501
3502 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3503 {
3504         struct hnae3_handle *h = priv->ae_handle;
3505         int i;
3506
3507         for (i = 0; i < h->kinfo.num_tqps; i++) {
3508                 hns3_fini_ring(priv->ring_data[i].ring);
3509                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3510         }
3511         return 0;
3512 }
3513
3514 /* Set mac addr if it is configured. or leave it to the AE driver */
3515 static int hns3_init_mac_addr(struct net_device *netdev, bool init)
3516 {
3517         struct hns3_nic_priv *priv = netdev_priv(netdev);
3518         struct hnae3_handle *h = priv->ae_handle;
3519         u8 mac_addr_temp[ETH_ALEN];
3520         int ret = 0;
3521
3522         if (h->ae_algo->ops->get_mac_addr && init) {
3523                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3524                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3525         }
3526
3527         /* Check if the MAC address is valid, if not get a random one */
3528         if (!is_valid_ether_addr(netdev->dev_addr)) {
3529                 eth_hw_addr_random(netdev);
3530                 dev_warn(priv->dev, "using random MAC address %pM\n",
3531                          netdev->dev_addr);
3532         }
3533
3534         if (h->ae_algo->ops->set_mac_addr)
3535                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3536
3537         return ret;
3538 }
3539
3540 static int hns3_init_phy(struct net_device *netdev)
3541 {
3542         struct hnae3_handle *h = hns3_get_handle(netdev);
3543         int ret = 0;
3544
3545         if (h->ae_algo->ops->mac_connect_phy)
3546                 ret = h->ae_algo->ops->mac_connect_phy(h);
3547
3548         return ret;
3549 }
3550
3551 static void hns3_uninit_phy(struct net_device *netdev)
3552 {
3553         struct hnae3_handle *h = hns3_get_handle(netdev);
3554
3555         if (h->ae_algo->ops->mac_disconnect_phy)
3556                 h->ae_algo->ops->mac_disconnect_phy(h);
3557 }
3558
3559 static int hns3_restore_fd_rules(struct net_device *netdev)
3560 {
3561         struct hnae3_handle *h = hns3_get_handle(netdev);
3562         int ret = 0;
3563
3564         if (h->ae_algo->ops->restore_fd_rules)
3565                 ret = h->ae_algo->ops->restore_fd_rules(h);
3566
3567         return ret;
3568 }
3569
3570 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3571 {
3572         struct hnae3_handle *h = hns3_get_handle(netdev);
3573
3574         if (h->ae_algo->ops->del_all_fd_entries)
3575                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3576 }
3577
3578 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3579 {
3580         struct hns3_nic_priv *priv = netdev_priv(netdev);
3581
3582         priv->ops.fill_desc = hns3_fill_desc;
3583         if ((netdev->features & NETIF_F_TSO) ||
3584             (netdev->features & NETIF_F_TSO6))
3585                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3586         else
3587                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3588 }
3589
3590 static int hns3_client_start(struct hnae3_handle *handle)
3591 {
3592         if (!handle->ae_algo->ops->client_start)
3593                 return 0;
3594
3595         return handle->ae_algo->ops->client_start(handle);
3596 }
3597
3598 static void hns3_client_stop(struct hnae3_handle *handle)
3599 {
3600         if (!handle->ae_algo->ops->client_stop)
3601                 return;
3602
3603         handle->ae_algo->ops->client_stop(handle);
3604 }
3605
3606 static int hns3_client_init(struct hnae3_handle *handle)
3607 {
3608         struct pci_dev *pdev = handle->pdev;
3609         u16 alloc_tqps, max_rss_size;
3610         struct hns3_nic_priv *priv;
3611         struct net_device *netdev;
3612         int ret;
3613
3614         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3615                                                     &max_rss_size);
3616         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3617         if (!netdev)
3618                 return -ENOMEM;
3619
3620         priv = netdev_priv(netdev);
3621         priv->dev = &pdev->dev;
3622         priv->netdev = netdev;
3623         priv->ae_handle = handle;
3624         priv->tx_timeout_count = 0;
3625         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
3626
3627         handle->kinfo.netdev = netdev;
3628         handle->priv = (void *)priv;
3629
3630         hns3_init_mac_addr(netdev, true);
3631
3632         hns3_set_default_feature(netdev);
3633
3634         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3635         netdev->priv_flags |= IFF_UNICAST_FLT;
3636         netdev->netdev_ops = &hns3_nic_netdev_ops;
3637         SET_NETDEV_DEV(netdev, &pdev->dev);
3638         hns3_ethtool_set_ops(netdev);
3639         hns3_nic_set_priv_ops(netdev);
3640
3641         /* Carrier off reporting is important to ethtool even BEFORE open */
3642         netif_carrier_off(netdev);
3643
3644         ret = hns3_get_ring_config(priv);
3645         if (ret) {
3646                 ret = -ENOMEM;
3647                 goto out_get_ring_cfg;
3648         }
3649
3650         ret = hns3_nic_alloc_vector_data(priv);
3651         if (ret) {
3652                 ret = -ENOMEM;
3653                 goto out_alloc_vector_data;
3654         }
3655
3656         ret = hns3_nic_init_vector_data(priv);
3657         if (ret) {
3658                 ret = -ENOMEM;
3659                 goto out_init_vector_data;
3660         }
3661
3662         ret = hns3_init_all_ring(priv);
3663         if (ret) {
3664                 ret = -ENOMEM;
3665                 goto out_init_ring_data;
3666         }
3667
3668         ret = hns3_init_phy(netdev);
3669         if (ret)
3670                 goto out_init_phy;
3671
3672         ret = register_netdev(netdev);
3673         if (ret) {
3674                 dev_err(priv->dev, "probe register netdev fail!\n");
3675                 goto out_reg_netdev_fail;
3676         }
3677
3678         ret = hns3_client_start(handle);
3679         if (ret) {
3680                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
3681                         goto out_reg_netdev_fail;
3682         }
3683
3684         hns3_dcbnl_setup(handle);
3685
3686         hns3_dbg_init(handle);
3687
3688         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
3689         netdev->max_mtu = HNS3_MAX_MTU;
3690
3691         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
3692
3693         return ret;
3694
3695 out_reg_netdev_fail:
3696         hns3_uninit_phy(netdev);
3697 out_init_phy:
3698         hns3_uninit_all_ring(priv);
3699 out_init_ring_data:
3700         hns3_nic_uninit_vector_data(priv);
3701 out_init_vector_data:
3702         hns3_nic_dealloc_vector_data(priv);
3703 out_alloc_vector_data:
3704         priv->ring_data = NULL;
3705 out_get_ring_cfg:
3706         priv->ae_handle = NULL;
3707         free_netdev(netdev);
3708         return ret;
3709 }
3710
3711 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3712 {
3713         struct net_device *netdev = handle->kinfo.netdev;
3714         struct hns3_nic_priv *priv = netdev_priv(netdev);
3715         int ret;
3716
3717         hns3_client_stop(handle);
3718
3719         hns3_remove_hw_addr(netdev);
3720
3721         if (netdev->reg_state != NETREG_UNINITIALIZED)
3722                 unregister_netdev(netdev);
3723
3724         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
3725                 netdev_warn(netdev, "already uninitialized\n");
3726                 goto out_netdev_free;
3727         }
3728
3729         hns3_del_all_fd_rules(netdev, true);
3730
3731         hns3_force_clear_all_rx_ring(handle);
3732
3733         hns3_uninit_phy(netdev);
3734
3735         hns3_nic_uninit_vector_data(priv);
3736
3737         ret = hns3_nic_dealloc_vector_data(priv);
3738         if (ret)
3739                 netdev_err(netdev, "dealloc vector error\n");
3740
3741         ret = hns3_uninit_all_ring(priv);
3742         if (ret)
3743                 netdev_err(netdev, "uninit ring error\n");
3744
3745         hns3_put_ring_config(priv);
3746
3747         hns3_dbg_uninit(handle);
3748
3749         priv->ring_data = NULL;
3750
3751 out_netdev_free:
3752         free_netdev(netdev);
3753 }
3754
3755 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3756 {
3757         struct net_device *netdev = handle->kinfo.netdev;
3758
3759         if (!netdev)
3760                 return;
3761
3762         if (linkup) {
3763                 netif_carrier_on(netdev);
3764                 netif_tx_wake_all_queues(netdev);
3765                 netdev_info(netdev, "link up\n");
3766         } else {
3767                 netif_carrier_off(netdev);
3768                 netif_tx_stop_all_queues(netdev);
3769                 netdev_info(netdev, "link down\n");
3770         }
3771 }
3772
3773 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3774 {
3775         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3776         struct net_device *ndev = kinfo->netdev;
3777
3778         if (tc > HNAE3_MAX_TC)
3779                 return -EINVAL;
3780
3781         if (!ndev)
3782                 return -ENODEV;
3783
3784         return hns3_nic_set_real_num_queue(ndev);
3785 }
3786
3787 static int hns3_recover_hw_addr(struct net_device *ndev)
3788 {
3789         struct netdev_hw_addr_list *list;
3790         struct netdev_hw_addr *ha, *tmp;
3791         int ret = 0;
3792
3793         /* go through and sync uc_addr entries to the device */
3794         list = &ndev->uc;
3795         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3796                 ret = hns3_nic_uc_sync(ndev, ha->addr);
3797                 if (ret)
3798                         return ret;
3799         }
3800
3801         /* go through and sync mc_addr entries to the device */
3802         list = &ndev->mc;
3803         list_for_each_entry_safe(ha, tmp, &list->list, list) {
3804                 ret = hns3_nic_mc_sync(ndev, ha->addr);
3805                 if (ret)
3806                         return ret;
3807         }
3808
3809         return ret;
3810 }
3811
3812 static void hns3_remove_hw_addr(struct net_device *netdev)
3813 {
3814         struct netdev_hw_addr_list *list;
3815         struct netdev_hw_addr *ha, *tmp;
3816
3817         hns3_nic_uc_unsync(netdev, netdev->dev_addr);
3818
3819         /* go through and unsync uc_addr entries to the device */
3820         list = &netdev->uc;
3821         list_for_each_entry_safe(ha, tmp, &list->list, list)
3822                 hns3_nic_uc_unsync(netdev, ha->addr);
3823
3824         /* go through and unsync mc_addr entries to the device */
3825         list = &netdev->mc;
3826         list_for_each_entry_safe(ha, tmp, &list->list, list)
3827                 if (ha->refcount > 1)
3828                         hns3_nic_mc_unsync(netdev, ha->addr);
3829 }
3830
3831 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3832 {
3833         while (ring->next_to_clean != ring->next_to_use) {
3834                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3835                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3836                 ring_ptr_move_fw(ring, next_to_clean);
3837         }
3838 }
3839
3840 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3841 {
3842         struct hns3_desc_cb res_cbs;
3843         int ret;
3844
3845         while (ring->next_to_use != ring->next_to_clean) {
3846                 /* When a buffer is not reused, it's memory has been
3847                  * freed in hns3_handle_rx_bd or will be freed by
3848                  * stack, so we need to replace the buffer here.
3849                  */
3850                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3851                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3852                         if (ret) {
3853                                 u64_stats_update_begin(&ring->syncp);
3854                                 ring->stats.sw_err_cnt++;
3855                                 u64_stats_update_end(&ring->syncp);
3856                                 /* if alloc new buffer fail, exit directly
3857                                  * and reclear in up flow.
3858                                  */
3859                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3860                                             "reserve buffer map failed, ret = %d\n",
3861                                             ret);
3862                                 return ret;
3863                         }
3864                         hns3_replace_buffer(ring, ring->next_to_use,
3865                                             &res_cbs);
3866                 }
3867                 ring_ptr_move_fw(ring, next_to_use);
3868         }
3869
3870         return 0;
3871 }
3872
3873 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3874 {
3875         while (ring->next_to_use != ring->next_to_clean) {
3876                 /* When a buffer is not reused, it's memory has been
3877                  * freed in hns3_handle_rx_bd or will be freed by
3878                  * stack, so only need to unmap the buffer here.
3879                  */
3880                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3881                         hns3_unmap_buffer(ring,
3882                                           &ring->desc_cb[ring->next_to_use]);
3883                         ring->desc_cb[ring->next_to_use].dma = 0;
3884                 }
3885
3886                 ring_ptr_move_fw(ring, next_to_use);
3887         }
3888 }
3889
3890 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3891 {
3892         struct net_device *ndev = h->kinfo.netdev;
3893         struct hns3_nic_priv *priv = netdev_priv(ndev);
3894         struct hns3_enet_ring *ring;
3895         u32 i;
3896
3897         for (i = 0; i < h->kinfo.num_tqps; i++) {
3898                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3899                 hns3_force_clear_rx_ring(ring);
3900         }
3901 }
3902
3903 static void hns3_clear_all_ring(struct hnae3_handle *h)
3904 {
3905         struct net_device *ndev = h->kinfo.netdev;
3906         struct hns3_nic_priv *priv = netdev_priv(ndev);
3907         u32 i;
3908
3909         for (i = 0; i < h->kinfo.num_tqps; i++) {
3910                 struct netdev_queue *dev_queue;
3911                 struct hns3_enet_ring *ring;
3912
3913                 ring = priv->ring_data[i].ring;
3914                 hns3_clear_tx_ring(ring);
3915                 dev_queue = netdev_get_tx_queue(ndev,
3916                                                 priv->ring_data[i].queue_index);
3917                 netdev_tx_reset_queue(dev_queue);
3918
3919                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3920                 /* Continue to clear other rings even if clearing some
3921                  * rings failed.
3922                  */
3923                 hns3_clear_rx_ring(ring);
3924         }
3925 }
3926
3927 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3928 {
3929         struct net_device *ndev = h->kinfo.netdev;
3930         struct hns3_nic_priv *priv = netdev_priv(ndev);
3931         struct hns3_enet_ring *rx_ring;
3932         int i, j;
3933         int ret;
3934
3935         for (i = 0; i < h->kinfo.num_tqps; i++) {
3936                 ret = h->ae_algo->ops->reset_queue(h, i);
3937                 if (ret)
3938                         return ret;
3939
3940                 hns3_init_ring_hw(priv->ring_data[i].ring);
3941
3942                 /* We need to clear tx ring here because self test will
3943                  * use the ring and will not run down before up
3944                  */
3945                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3946                 priv->ring_data[i].ring->next_to_clean = 0;
3947                 priv->ring_data[i].ring->next_to_use = 0;
3948
3949                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3950                 hns3_init_ring_hw(rx_ring);
3951                 ret = hns3_clear_rx_ring(rx_ring);
3952                 if (ret)
3953                         return ret;
3954
3955                 /* We can not know the hardware head and tail when this
3956                  * function is called in reset flow, so we reuse all desc.
3957                  */
3958                 for (j = 0; j < rx_ring->desc_num; j++)
3959                         hns3_reuse_buffer(rx_ring, j);
3960
3961                 rx_ring->next_to_clean = 0;
3962                 rx_ring->next_to_use = 0;
3963         }
3964
3965         hns3_init_tx_ring_tc(priv);
3966
3967         return 0;
3968 }
3969
3970 static void hns3_store_coal(struct hns3_nic_priv *priv)
3971 {
3972         /* ethtool only support setting and querying one coal
3973          * configuation for now, so save the vector 0' coal
3974          * configuation here in order to restore it.
3975          */
3976         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3977                sizeof(struct hns3_enet_coalesce));
3978         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3979                sizeof(struct hns3_enet_coalesce));
3980 }
3981
3982 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3983 {
3984         u16 vector_num = priv->vector_num;
3985         int i;
3986
3987         for (i = 0; i < vector_num; i++) {
3988                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3989                        sizeof(struct hns3_enet_coalesce));
3990                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3991                        sizeof(struct hns3_enet_coalesce));
3992         }
3993 }
3994
3995 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3996 {
3997         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(handle->pdev);
3998         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3999         struct net_device *ndev = kinfo->netdev;
4000         struct hns3_nic_priv *priv = netdev_priv(ndev);
4001
4002         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
4003                 return 0;
4004
4005         /* it is cumbersome for hardware to pick-and-choose entries for deletion
4006          * from table space. Hence, for function reset software intervention is
4007          * required to delete the entries
4008          */
4009         if (hns3_dev_ongoing_func_reset(ae_dev)) {
4010                 hns3_remove_hw_addr(ndev);
4011                 hns3_del_all_fd_rules(ndev, false);
4012         }
4013
4014         if (!netif_running(ndev))
4015                 return 0;
4016
4017         return hns3_nic_net_stop(ndev);
4018 }
4019
4020 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
4021 {
4022         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4023         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
4024         int ret = 0;
4025
4026         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4027
4028         if (netif_running(kinfo->netdev)) {
4029                 ret = hns3_nic_net_open(kinfo->netdev);
4030                 if (ret) {
4031                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4032                         netdev_err(kinfo->netdev,
4033                                    "hns net up fail, ret=%d!\n", ret);
4034                         return ret;
4035                 }
4036         }
4037
4038         return ret;
4039 }
4040
4041 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4042 {
4043         struct net_device *netdev = handle->kinfo.netdev;
4044         struct hns3_nic_priv *priv = netdev_priv(netdev);
4045         int ret;
4046
4047         /* Carrier off reporting is important to ethtool even BEFORE open */
4048         netif_carrier_off(netdev);
4049
4050         ret = hns3_get_ring_config(priv);
4051         if (ret)
4052                 return ret;
4053
4054         ret = hns3_nic_alloc_vector_data(priv);
4055         if (ret)
4056                 goto err_put_ring;
4057
4058         hns3_restore_coal(priv);
4059
4060         ret = hns3_nic_init_vector_data(priv);
4061         if (ret)
4062                 goto err_dealloc_vector;
4063
4064         ret = hns3_init_all_ring(priv);
4065         if (ret)
4066                 goto err_uninit_vector;
4067
4068         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4069
4070         return ret;
4071
4072 err_uninit_vector:
4073         hns3_nic_uninit_vector_data(priv);
4074         priv->ring_data = NULL;
4075 err_dealloc_vector:
4076         hns3_nic_dealloc_vector_data(priv);
4077 err_put_ring:
4078         hns3_put_ring_config(priv);
4079         priv->ring_data = NULL;
4080
4081         return ret;
4082 }
4083
4084 static int hns3_reset_notify_restore_enet(struct hnae3_handle *handle)
4085 {
4086         struct net_device *netdev = handle->kinfo.netdev;
4087         bool vlan_filter_enable;
4088         int ret;
4089
4090         ret = hns3_init_mac_addr(netdev, false);
4091         if (ret)
4092                 return ret;
4093
4094         ret = hns3_recover_hw_addr(netdev);
4095         if (ret)
4096                 return ret;
4097
4098         ret = hns3_update_promisc_mode(netdev, handle->netdev_flags);
4099         if (ret)
4100                 return ret;
4101
4102         vlan_filter_enable = netdev->flags & IFF_PROMISC ? false : true;
4103         hns3_enable_vlan_filter(netdev, vlan_filter_enable);
4104
4105         /* Hardware table is only clear when pf resets */
4106         if (!(handle->flags & HNAE3_SUPPORT_VF)) {
4107                 ret = hns3_restore_vlan(netdev);
4108                 if (ret)
4109                         return ret;
4110         }
4111
4112         return hns3_restore_fd_rules(netdev);
4113 }
4114
4115 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4116 {
4117         struct net_device *netdev = handle->kinfo.netdev;
4118         struct hns3_nic_priv *priv = netdev_priv(netdev);
4119         int ret;
4120
4121         if (!test_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4122                 netdev_warn(netdev, "already uninitialized\n");
4123                 return 0;
4124         }
4125
4126         hns3_force_clear_all_rx_ring(handle);
4127
4128         hns3_nic_uninit_vector_data(priv);
4129
4130         hns3_store_coal(priv);
4131
4132         ret = hns3_nic_dealloc_vector_data(priv);
4133         if (ret)
4134                 netdev_err(netdev, "dealloc vector error\n");
4135
4136         ret = hns3_uninit_all_ring(priv);
4137         if (ret)
4138                 netdev_err(netdev, "uninit ring error\n");
4139
4140         hns3_put_ring_config(priv);
4141         priv->ring_data = NULL;
4142
4143         clear_bit(HNS3_NIC_STATE_INITED, &priv->state);
4144
4145         return ret;
4146 }
4147
4148 static int hns3_reset_notify(struct hnae3_handle *handle,
4149                              enum hnae3_reset_notify_type type)
4150 {
4151         int ret = 0;
4152
4153         switch (type) {
4154         case HNAE3_UP_CLIENT:
4155                 ret = hns3_reset_notify_up_enet(handle);
4156                 break;
4157         case HNAE3_DOWN_CLIENT:
4158                 ret = hns3_reset_notify_down_enet(handle);
4159                 break;
4160         case HNAE3_INIT_CLIENT:
4161                 ret = hns3_reset_notify_init_enet(handle);
4162                 break;
4163         case HNAE3_UNINIT_CLIENT:
4164                 ret = hns3_reset_notify_uninit_enet(handle);
4165                 break;
4166         case HNAE3_RESTORE_CLIENT:
4167                 ret = hns3_reset_notify_restore_enet(handle);
4168                 break;
4169         default:
4170                 break;
4171         }
4172
4173         return ret;
4174 }
4175
4176 int hns3_set_channels(struct net_device *netdev,
4177                       struct ethtool_channels *ch)
4178 {
4179         struct hnae3_handle *h = hns3_get_handle(netdev);
4180         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4181         bool rxfh_configured = netif_is_rxfh_configured(netdev);
4182         u32 new_tqp_num = ch->combined_count;
4183         u16 org_tqp_num;
4184         int ret;
4185
4186         if (ch->rx_count || ch->tx_count)
4187                 return -EINVAL;
4188
4189         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4190             new_tqp_num < 1) {
4191                 dev_err(&netdev->dev,
4192                         "Change tqps fail, the tqp range is from 1 to %d",
4193                         hns3_get_max_available_channels(h));
4194                 return -EINVAL;
4195         }
4196
4197         if (kinfo->rss_size == new_tqp_num)
4198                 return 0;
4199
4200         ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
4201         if (ret)
4202                 return ret;
4203
4204         ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
4205         if (ret)
4206                 return ret;
4207
4208         org_tqp_num = h->kinfo.num_tqps;
4209         ret = h->ae_algo->ops->set_channels(h, new_tqp_num, rxfh_configured);
4210         if (ret) {
4211                 ret = h->ae_algo->ops->set_channels(h, org_tqp_num,
4212                                                     rxfh_configured);
4213                 if (ret) {
4214                         /* If revert to old tqp failed, fatal error occurred */
4215                         dev_err(&netdev->dev,
4216                                 "Revert to old tqp num fail, ret=%d", ret);
4217                         return ret;
4218                 }
4219                 dev_info(&netdev->dev,
4220                          "Change tqp num fail, Revert to old tqp num");
4221         }
4222         ret = hns3_reset_notify(h, HNAE3_INIT_CLIENT);
4223         if (ret)
4224                 return ret;
4225
4226         return hns3_reset_notify(h, HNAE3_UP_CLIENT);
4227 }
4228
4229 static const struct hnae3_client_ops client_ops = {
4230         .init_instance = hns3_client_init,
4231         .uninit_instance = hns3_client_uninit,
4232         .link_status_change = hns3_link_status_change,
4233         .setup_tc = hns3_client_setup_tc,
4234         .reset_notify = hns3_reset_notify,
4235 };
4236
4237 /* hns3_init_module - Driver registration routine
4238  * hns3_init_module is the first routine called when the driver is
4239  * loaded. All it does is register with the PCI subsystem.
4240  */
4241 static int __init hns3_init_module(void)
4242 {
4243         int ret;
4244
4245         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4246         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4247
4248         client.type = HNAE3_CLIENT_KNIC;
4249         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
4250                  hns3_driver_name);
4251
4252         client.ops = &client_ops;
4253
4254         INIT_LIST_HEAD(&client.node);
4255
4256         hns3_dbg_register_debugfs(hns3_driver_name);
4257
4258         ret = hnae3_register_client(&client);
4259         if (ret)
4260                 goto err_reg_client;
4261
4262         ret = pci_register_driver(&hns3_driver);
4263         if (ret)
4264                 goto err_reg_driver;
4265
4266         return ret;
4267
4268 err_reg_driver:
4269         hnae3_unregister_client(&client);
4270 err_reg_client:
4271         hns3_dbg_unregister_debugfs();
4272         return ret;
4273 }
4274 module_init(hns3_init_module);
4275
4276 /* hns3_exit_module - Driver exit cleanup routine
4277  * hns3_exit_module is called just before the driver is removed
4278  * from memory.
4279  */
4280 static void __exit hns3_exit_module(void)
4281 {
4282         pci_unregister_driver(&hns3_driver);
4283         hnae3_unregister_client(&client);
4284         hns3_dbg_unregister_debugfs();
4285 }
4286 module_exit(hns3_exit_module);
4287
4288 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4289 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4290 MODULE_LICENSE("GPL");
4291 MODULE_ALIAS("pci:hns-nic");
4292 MODULE_VERSION(HNS3_MOD_VERSION);