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/skbuff.h>
  13 #include <linux/sctp.h>
  14 #include <linux/vermagic.h>
  15 #include <net/gre.h>
  16 #include <net/pkt_cls.h>
  17 #include <net/vxlan.h>
  18
  19 #include "hnae3.h"
  20 #include "hns3_enet.h"
  21
  22 static void hns3_clear_all_ring(struct hnae3_handle *h);
  23 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h);
  24
  25 static const char hns3_driver_name[] = "hns3";
  26 const char hns3_driver_version[] = VERMAGIC_STRING;
  27 static const char hns3_driver_string[] =
  28                         "Hisilicon Ethernet Network Driver for Hip08 Family";
  29 static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
  30 static struct hnae3_client client;
  31
  32 /* hns3_pci_tbl - PCI Device ID Table
  33  *
  34  * Last entry must be all 0s
  35  *
  36  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  37  *   Class, Class Mask, private data (not used) }
  38  */
  39 static const struct pci_device_id hns3_pci_tbl[] = {
  40         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
  41         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
  42         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA),
  43          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  44         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC),
  45          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  46         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA),
  47          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  48         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC),
  49          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  50         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC),
  51          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  52         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_VF), 0},
  53         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF),
  54          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  55         /* required last entry */
  56         {0, }
  57 };
  58 MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);
  59
  60 static irqreturn_t hns3_irq_handle(int irq, void *vector)
  61 {
  62         struct hns3_enet_tqp_vector *tqp_vector = vector;
  63
  64         napi_schedule(&tqp_vector->napi);
  65
  66         return IRQ_HANDLED;
  67 }
  68
  69 /* This callback function is used to set affinity changes to the irq affinity
  70  * masks when the irq_set_affinity_notifier function is used.
  71  */
  72 static void hns3_nic_irq_affinity_notify(struct irq_affinity_notify *notify,
  73                                          const cpumask_t *mask)
  74 {
  75         struct hns3_enet_tqp_vector *tqp_vectors =
  76                 container_of(notify, struct hns3_enet_tqp_vector,
  77                              affinity_notify);
  78
  79         tqp_vectors->affinity_mask = *mask;
  80 }
  81
  82 static void hns3_nic_irq_affinity_release(struct kref *ref)
  83 {
  84 }
  85
  86 static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
  87 {
  88         struct hns3_enet_tqp_vector *tqp_vectors;
  89         unsigned int i;
  90
  91         for (i = 0; i < priv->vector_num; i++) {
  92                 tqp_vectors = &priv->tqp_vector[i];
  93
  94                 if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
  95                         continue;
  96
  97                 /* clear the affinity notifier and affinity mask */
  98                 irq_set_affinity_notifier(tqp_vectors->vector_irq, NULL);
  99                 irq_set_affinity_hint(tqp_vectors->vector_irq, NULL);
 100
 101                 /* release the irq resource */
 102                 free_irq(tqp_vectors->vector_irq, tqp_vectors);
 103                 tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
 104         }
 105 }
 106
 107 static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 108 {
 109         struct hns3_enet_tqp_vector *tqp_vectors;
 110         int txrx_int_idx = 0;
 111         int rx_int_idx = 0;
 112         int tx_int_idx = 0;
 113         unsigned int i;
 114         int ret;
 115
 116         for (i = 0; i < priv->vector_num; i++) {
 117                 tqp_vectors = &priv->tqp_vector[i];
 118
 119                 if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
 120                         continue;
 121
 122                 if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
 123                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 124                                  "%s-%s-%d", priv->netdev->name, "TxRx",
 125                                  txrx_int_idx++);
 126                         txrx_int_idx++;
 127                 } else if (tqp_vectors->rx_group.ring) {
 128                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 129                                  "%s-%s-%d", priv->netdev->name, "Rx",
 130                                  rx_int_idx++);
 131                 } else if (tqp_vectors->tx_group.ring) {
 132                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN - 1,
 133                                  "%s-%s-%d", priv->netdev->name, "Tx",
 134                                  tx_int_idx++);
 135                 } else {
 136                         /* Skip this unused q_vector */
 137                         continue;
 138                 }
 139
 140                 tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
 141
 142                 ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
 143                                   tqp_vectors->name,
 144                                        tqp_vectors);
 145                 if (ret) {
 146                         netdev_err(priv->netdev, "request irq(%d) fail\n",
 147                                    tqp_vectors->vector_irq);
 148                         return ret;
 149                 }
 150
 151                 tqp_vectors->affinity_notify.notify =
 152                                         hns3_nic_irq_affinity_notify;
 153                 tqp_vectors->affinity_notify.release =
 154                                         hns3_nic_irq_affinity_release;
 155                 irq_set_affinity_notifier(tqp_vectors->vector_irq,
 156                                           &tqp_vectors->affinity_notify);
 157                 irq_set_affinity_hint(tqp_vectors->vector_irq,
 158                                       &tqp_vectors->affinity_mask);
 159
 160                 tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
 161         }
 162
 163         return 0;
 164 }
 165
 166 static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
 167                                  u32 mask_en)
 168 {
 169         writel(mask_en, tqp_vector->mask_addr);
 170 }
 171
 172 static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
 173 {
 174         napi_enable(&tqp_vector->napi);
 175
 176         /* enable vector */
 177         hns3_mask_vector_irq(tqp_vector, 1);
 178 }
 179
 180 static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
 181 {
 182         /* disable vector */
 183         hns3_mask_vector_irq(tqp_vector, 0);
 184
 185         disable_irq(tqp_vector->vector_irq);
 186         napi_disable(&tqp_vector->napi);
 187 }
 188
 189 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 190                                  u32 rl_value)
 191 {
 192         u32 rl_reg = hns3_rl_usec_to_reg(rl_value);
 193
 194         /* this defines the configuration for RL (Interrupt Rate Limiter).
 195          * Rl defines rate of interrupts i.e. number of interrupts-per-second
 196          * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
 197          */
 198
 199         if (rl_reg > 0 && !tqp_vector->tx_group.coal.gl_adapt_enable &&
 200             !tqp_vector->rx_group.coal.gl_adapt_enable)
 201                 /* According to the hardware, the range of rl_reg is
 202                  * 0-59 and the unit is 4.
 203                  */
 204                 rl_reg |=  HNS3_INT_RL_ENABLE_MASK;
 205
 206         writel(rl_reg, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
 207 }
 208
 209 void hns3_set_vector_coalesce_rx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 210                                     u32 gl_value)
 211 {
 212         u32 rx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 213
 214         writel(rx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
 215 }
 216
 217 void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 218                                     u32 gl_value)
 219 {
 220         u32 tx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 221
 222         writel(tx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
 223 }
 224
 225 static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
 226                                    struct hns3_nic_priv *priv)
 227 {
 228         /* initialize the configuration for interrupt coalescing.
 229          * 1. GL (Interrupt Gap Limiter)
 230          * 2. RL (Interrupt Rate Limiter)
 231          */
 232
 233         /* Default: enable interrupt coalescing self-adaptive and GL */
 234         tqp_vector->tx_group.coal.gl_adapt_enable = 1;
 235         tqp_vector->rx_group.coal.gl_adapt_enable = 1;
 236
 237         tqp_vector->tx_group.coal.int_gl = HNS3_INT_GL_50K;
 238         tqp_vector->rx_group.coal.int_gl = HNS3_INT_GL_50K;
 239
 240         tqp_vector->int_adapt_down = HNS3_INT_ADAPT_DOWN_START;
 241         tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
 242         tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
 243 }
 244
 245 static void hns3_vector_gl_rl_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
 246                                       struct hns3_nic_priv *priv)
 247 {
 248         struct hnae3_handle *h = priv->ae_handle;
 249
 250         hns3_set_vector_coalesce_tx_gl(tqp_vector,
 251                                        tqp_vector->tx_group.coal.int_gl);
 252         hns3_set_vector_coalesce_rx_gl(tqp_vector,
 253                                        tqp_vector->rx_group.coal.int_gl);
 254         hns3_set_vector_coalesce_rl(tqp_vector, h->kinfo.int_rl_setting);
 255 }
 256
 257 static int hns3_nic_set_real_num_queue(struct net_device *netdev)
 258 {
 259         struct hnae3_handle *h = hns3_get_handle(netdev);
 260         struct hnae3_knic_private_info *kinfo = &h->kinfo;
 261         unsigned int queue_size = kinfo->rss_size * kinfo->num_tc;
 262         int i, ret;
 263
 264         if (kinfo->num_tc <= 1) {
 265                 netdev_reset_tc(netdev);
 266         } else {
 267                 ret = netdev_set_num_tc(netdev, kinfo->num_tc);
 268                 if (ret) {
 269                         netdev_err(netdev,
 270                                    "netdev_set_num_tc fail, ret=%d!\n", ret);
 271                         return ret;
 272                 }
 273
 274                 for (i = 0; i < HNAE3_MAX_TC; i++) {
 275                         if (!kinfo->tc_info[i].enable)
 276                                 continue;
 277
 278                         netdev_set_tc_queue(netdev,
 279                                             kinfo->tc_info[i].tc,
 280                                             kinfo->tc_info[i].tqp_count,
 281                                             kinfo->tc_info[i].tqp_offset);
 282                 }
 283         }
 284
 285         ret = netif_set_real_num_tx_queues(netdev, queue_size);
 286         if (ret) {
 287                 netdev_err(netdev,
 288                            "netif_set_real_num_tx_queues fail, ret=%d!\n",
 289                            ret);
 290                 return ret;
 291         }
 292
 293         ret = netif_set_real_num_rx_queues(netdev, queue_size);
 294         if (ret) {
 295                 netdev_err(netdev,
 296                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
 297                 return ret;
 298         }
 299
 300         return 0;
 301 }
 302
 303 static u16 hns3_get_max_available_channels(struct hnae3_handle *h)
 304 {
 305         u16 alloc_tqps, max_rss_size, rss_size;
 306
 307         h->ae_algo->ops->get_tqps_and_rss_info(h, &alloc_tqps, &max_rss_size);
 308         rss_size = alloc_tqps / h->kinfo.num_tc;
 309
 310         return min_t(u16, rss_size, max_rss_size);
 311 }
 312
 313 static int hns3_nic_net_up(struct net_device *netdev)
 314 {
 315         struct hns3_nic_priv *priv = netdev_priv(netdev);
 316         struct hnae3_handle *h = priv->ae_handle;
 317         int i, j;
 318         int ret;
 319
 320         ret = hns3_nic_reset_all_ring(h);
 321         if (ret)
 322                 return ret;
 323
 324         /* get irq resource for all vectors */
 325         ret = hns3_nic_init_irq(priv);
 326         if (ret) {
 327                 netdev_err(netdev, "hns init irq failed! ret=%d\n", ret);
 328                 return ret;
 329         }
 330
 331         /* enable the vectors */
 332         for (i = 0; i < priv->vector_num; i++)
 333                 hns3_vector_enable(&priv->tqp_vector[i]);
 334
 335         /* start the ae_dev */
 336         ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
 337         if (ret)
 338                 goto out_start_err;
 339
 340         clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 341
 342         return 0;
 343
 344 out_start_err:
 345         for (j = i - 1; j >= 0; j--)
 346                 hns3_vector_disable(&priv->tqp_vector[j]);
 347
 348         hns3_nic_uninit_irq(priv);
 349
 350         return ret;
 351 }
 352
 353 static int hns3_nic_net_open(struct net_device *netdev)
 354 {
 355         struct hns3_nic_priv *priv = netdev_priv(netdev);
 356         struct hnae3_handle *h = hns3_get_handle(netdev);
 357         struct hnae3_knic_private_info *kinfo;
 358         int i, ret;
 359
 360         netif_carrier_off(netdev);
 361
 362         ret = hns3_nic_set_real_num_queue(netdev);
 363         if (ret)
 364                 return ret;
 365
 366         ret = hns3_nic_net_up(netdev);
 367         if (ret) {
 368                 netdev_err(netdev,
 369                            "hns net up fail, ret=%d!\n", ret);
 370                 return ret;
 371         }
 372
 373         kinfo = &h->kinfo;
 374         for (i = 0; i < HNAE3_MAX_USER_PRIO; i++) {
 375                 netdev_set_prio_tc_map(netdev, i,
 376                                        kinfo->prio_tc[i]);
 377         }
 378
 379         priv->ae_handle->last_reset_time = jiffies;
 380         return 0;
 381 }
 382
 383 static void hns3_nic_net_down(struct net_device *netdev)
 384 {
 385         struct hns3_nic_priv *priv = netdev_priv(netdev);
 386         const struct hnae3_ae_ops *ops;
 387         int i;
 388
 389         if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
 390                 return;
 391
 392         /* disable vectors */
 393         for (i = 0; i < priv->vector_num; i++)
 394                 hns3_vector_disable(&priv->tqp_vector[i]);
 395
 396         /* stop ae_dev */
 397         ops = priv->ae_handle->ae_algo->ops;
 398         if (ops->stop)
 399                 ops->stop(priv->ae_handle);
 400
 401         /* free irq resources */
 402         hns3_nic_uninit_irq(priv);
 403
 404         hns3_clear_all_ring(priv->ae_handle);
 405 }
 406
 407 static int hns3_nic_net_stop(struct net_device *netdev)
 408 {
 409         netif_tx_stop_all_queues(netdev);
 410         netif_carrier_off(netdev);
 411
 412         hns3_nic_net_down(netdev);
 413
 414         return 0;
 415 }
 416
 417 static int hns3_nic_uc_sync(struct net_device *netdev,
 418                             const unsigned char *addr)
 419 {
 420         struct hnae3_handle *h = hns3_get_handle(netdev);
 421
 422         if (h->ae_algo->ops->add_uc_addr)
 423                 return h->ae_algo->ops->add_uc_addr(h, addr);
 424
 425         return 0;
 426 }
 427
 428 static int hns3_nic_uc_unsync(struct net_device *netdev,
 429                               const unsigned char *addr)
 430 {
 431         struct hnae3_handle *h = hns3_get_handle(netdev);
 432
 433         if (h->ae_algo->ops->rm_uc_addr)
 434                 return h->ae_algo->ops->rm_uc_addr(h, addr);
 435
 436         return 0;
 437 }
 438
 439 static int hns3_nic_mc_sync(struct net_device *netdev,
 440                             const unsigned char *addr)
 441 {
 442         struct hnae3_handle *h = hns3_get_handle(netdev);
 443
 444         if (h->ae_algo->ops->add_mc_addr)
 445                 return h->ae_algo->ops->add_mc_addr(h, addr);
 446
 447         return 0;
 448 }
 449
 450 static int hns3_nic_mc_unsync(struct net_device *netdev,
 451                               const unsigned char *addr)
 452 {
 453         struct hnae3_handle *h = hns3_get_handle(netdev);
 454
 455         if (h->ae_algo->ops->rm_mc_addr)
 456                 return h->ae_algo->ops->rm_mc_addr(h, addr);
 457
 458         return 0;
 459 }
 460
 461 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 462 {
 463         struct hnae3_handle *h = hns3_get_handle(netdev);
 464
 465         if (h->ae_algo->ops->set_promisc_mode) {
 466                 if (netdev->flags & IFF_PROMISC)
 467                         h->ae_algo->ops->set_promisc_mode(h, true, true);
 468                 else if (netdev->flags & IFF_ALLMULTI)
 469                         h->ae_algo->ops->set_promisc_mode(h, false, true);
 470                 else
 471                         h->ae_algo->ops->set_promisc_mode(h, false, false);
 472         }
 473         if (__dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync))
 474                 netdev_err(netdev, "sync uc address fail\n");
 475         if (netdev->flags & IFF_MULTICAST) {
 476                 if (__dev_mc_sync(netdev, hns3_nic_mc_sync, hns3_nic_mc_unsync))
 477                         netdev_err(netdev, "sync mc address fail\n");
 478
 479                 if (h->ae_algo->ops->update_mta_status)
 480                         h->ae_algo->ops->update_mta_status(h);
 481         }
 482 }
 483
 484 static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
 485                         u16 *mss, u32 *type_cs_vlan_tso)
 486 {
 487         u32 l4_offset, hdr_len;
 488         union l3_hdr_info l3;
 489         union l4_hdr_info l4;
 490         u32 l4_paylen;
 491         int ret;
 492
 493         if (!skb_is_gso(skb))
 494                 return 0;
 495
 496         ret = skb_cow_head(skb, 0);
 497         if (ret)
 498                 return ret;
 499
 500         l3.hdr = skb_network_header(skb);
 501         l4.hdr = skb_transport_header(skb);
 502
 503         /* Software should clear the IPv4's checksum field when tso is
 504          * needed.
 505          */
 506         if (l3.v4->version == 4)
 507                 l3.v4->check = 0;
 508
 509         /* tunnel packet.*/
 510         if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 511                                          SKB_GSO_GRE_CSUM |
 512                                          SKB_GSO_UDP_TUNNEL |
 513                                          SKB_GSO_UDP_TUNNEL_CSUM)) {
 514                 if ((!(skb_shinfo(skb)->gso_type &
 515                     SKB_GSO_PARTIAL)) &&
 516                     (skb_shinfo(skb)->gso_type &
 517                     SKB_GSO_UDP_TUNNEL_CSUM)) {
 518                         /* Software should clear the udp's checksum
 519                          * field when tso is needed.
 520                          */
 521                         l4.udp->check = 0;
 522                 }
 523                 /* reset l3&l4 pointers from outer to inner headers */
 524                 l3.hdr = skb_inner_network_header(skb);
 525                 l4.hdr = skb_inner_transport_header(skb);
 526
 527                 /* Software should clear the IPv4's checksum field when
 528                  * tso is needed.
 529                  */
 530                 if (l3.v4->version == 4)
 531                         l3.v4->check = 0;
 532         }
 533
 534         /* normal or tunnel packet*/
 535         l4_offset = l4.hdr - skb->data;
 536         hdr_len = (l4.tcp->doff * 4) + l4_offset;
 537
 538         /* remove payload length from inner pseudo checksum when tso*/
 539         l4_paylen = skb->len - l4_offset;
 540         csum_replace_by_diff(&l4.tcp->check,
 541                              (__force __wsum)htonl(l4_paylen));
 542
 543         /* find the txbd field values */
 544         *paylen = skb->len - hdr_len;
 545         hnae3_set_bit(*type_cs_vlan_tso,
 546                       HNS3_TXD_TSO_B, 1);
 547
 548         /* get MSS for TSO */
 549         *mss = skb_shinfo(skb)->gso_size;
 550
 551         return 0;
 552 }
 553
 554 static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 555                                 u8 *il4_proto)
 556 {
 557         union {
 558                 struct iphdr *v4;
 559                 struct ipv6hdr *v6;
 560                 unsigned char *hdr;
 561         } l3;
 562         unsigned char *l4_hdr;
 563         unsigned char *exthdr;
 564         u8 l4_proto_tmp;
 565         __be16 frag_off;
 566
 567         /* find outer header point */
 568         l3.hdr = skb_network_header(skb);
 569         l4_hdr = skb_transport_header(skb);
 570
 571         if (skb->protocol == htons(ETH_P_IPV6)) {
 572                 exthdr = l3.hdr + sizeof(*l3.v6);
 573                 l4_proto_tmp = l3.v6->nexthdr;
 574                 if (l4_hdr != exthdr)
 575                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 576                                          &l4_proto_tmp, &frag_off);
 577         } else if (skb->protocol == htons(ETH_P_IP)) {
 578                 l4_proto_tmp = l3.v4->protocol;
 579         } else {
 580                 return -EINVAL;
 581         }
 582
 583         *ol4_proto = l4_proto_tmp;
 584
 585         /* tunnel packet */
 586         if (!skb->encapsulation) {
 587                 *il4_proto = 0;
 588                 return 0;
 589         }
 590
 591         /* find inner header point */
 592         l3.hdr = skb_inner_network_header(skb);
 593         l4_hdr = skb_inner_transport_header(skb);
 594
 595         if (l3.v6->version == 6) {
 596                 exthdr = l3.hdr + sizeof(*l3.v6);
 597                 l4_proto_tmp = l3.v6->nexthdr;
 598                 if (l4_hdr != exthdr)
 599                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 600                                          &l4_proto_tmp, &frag_off);
 601         } else if (l3.v4->version == 4) {
 602                 l4_proto_tmp = l3.v4->protocol;
 603         }
 604
 605         *il4_proto = l4_proto_tmp;
 606
 607         return 0;
 608 }
 609
 610 static void hns3_set_l2l3l4_len(struct sk_buff *skb, u8 ol4_proto,
 611                                 u8 il4_proto, u32 *type_cs_vlan_tso,
 612                                 u32 *ol_type_vlan_len_msec)
 613 {
 614         union {
 615                 struct iphdr *v4;
 616                 struct ipv6hdr *v6;
 617                 unsigned char *hdr;
 618         } l3;
 619         union {
 620                 struct tcphdr *tcp;
 621                 struct udphdr *udp;
 622                 struct gre_base_hdr *gre;
 623                 unsigned char *hdr;
 624         } l4;
 625         unsigned char *l2_hdr;
 626         u8 l4_proto = ol4_proto;
 627         u32 ol2_len;
 628         u32 ol3_len;
 629         u32 ol4_len;
 630         u32 l2_len;
 631         u32 l3_len;
 632
 633         l3.hdr = skb_network_header(skb);
 634         l4.hdr = skb_transport_header(skb);
 635
 636         /* compute L2 header size for normal packet, defined in 2 Bytes */
 637         l2_len = l3.hdr - skb->data;
 638         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 639                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 640
 641         /* tunnel packet*/
 642         if (skb->encapsulation) {
 643                 /* compute OL2 header size, defined in 2 Bytes */
 644                 ol2_len = l2_len;
 645                 hnae3_set_field(*ol_type_vlan_len_msec,
 646                                 HNS3_TXD_L2LEN_M,
 647                                 HNS3_TXD_L2LEN_S, ol2_len >> 1);
 648
 649                 /* compute OL3 header size, defined in 4 Bytes */
 650                 ol3_len = l4.hdr - l3.hdr;
 651                 hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_M,
 652                                 HNS3_TXD_L3LEN_S, ol3_len >> 2);
 653
 654                 /* MAC in UDP, MAC in GRE (0x6558)*/
 655                 if ((ol4_proto == IPPROTO_UDP) || (ol4_proto == IPPROTO_GRE)) {
 656                         /* switch MAC header ptr from outer to inner header.*/
 657                         l2_hdr = skb_inner_mac_header(skb);
 658
 659                         /* compute OL4 header size, defined in 4 Bytes. */
 660                         ol4_len = l2_hdr - l4.hdr;
 661                         hnae3_set_field(*ol_type_vlan_len_msec,
 662                                         HNS3_TXD_L4LEN_M, HNS3_TXD_L4LEN_S,
 663                                         ol4_len >> 2);
 664
 665                         /* switch IP header ptr from outer to inner header */
 666                         l3.hdr = skb_inner_network_header(skb);
 667
 668                         /* compute inner l2 header size, defined in 2 Bytes. */
 669                         l2_len = l3.hdr - l2_hdr;
 670                         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_M,
 671                                         HNS3_TXD_L2LEN_S, l2_len >> 1);
 672                 } else {
 673                         /* skb packet types not supported by hardware,
 674                          * txbd len fild doesn't be filled.
 675                          */
 676                         return;
 677                 }
 678
 679                 /* switch L4 header pointer from outer to inner */
 680                 l4.hdr = skb_inner_transport_header(skb);
 681
 682                 l4_proto = il4_proto;
 683         }
 684
 685         /* compute inner(/normal) L3 header size, defined in 4 Bytes */
 686         l3_len = l4.hdr - l3.hdr;
 687         hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_M,
 688                         HNS3_TXD_L3LEN_S, l3_len >> 2);
 689
 690         /* compute inner(/normal) L4 header size, defined in 4 Bytes */
 691         switch (l4_proto) {
 692         case IPPROTO_TCP:
 693                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 694                                 HNS3_TXD_L4LEN_S, l4.tcp->doff);
 695                 break;
 696         case IPPROTO_SCTP:
 697                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 698                                 HNS3_TXD_L4LEN_S,
 699                                 (sizeof(struct sctphdr) >> 2));
 700                 break;
 701         case IPPROTO_UDP:
 702                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_M,
 703                                 HNS3_TXD_L4LEN_S,
 704                                 (sizeof(struct udphdr) >> 2));
 705                 break;
 706         default:
 707                 /* skb packet types not supported by hardware,
 708                  * txbd len fild doesn't be filled.
 709                  */
 710                 return;
 711         }
 712 }
 713
 714 /* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
 715  * and it is udp packet, which has a dest port as the IANA assigned.
 716  * the hardware is expected to do the checksum offload, but the
 717  * hardware will not do the checksum offload when udp dest port is
 718  * 4789.
 719  */
 720 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 721 {
 722 #define IANA_VXLAN_PORT 4789
 723         union {
 724                 struct tcphdr *tcp;
 725                 struct udphdr *udp;
 726                 struct gre_base_hdr *gre;
 727                 unsigned char *hdr;
 728         } l4;
 729
 730         l4.hdr = skb_transport_header(skb);
 731
 732         if (!(!skb->encapsulation && l4.udp->dest == htons(IANA_VXLAN_PORT)))
 733                 return false;
 734
 735         skb_checksum_help(skb);
 736
 737         return true;
 738 }
 739
 740 static int hns3_set_l3l4_type_csum(struct sk_buff *skb, u8 ol4_proto,
 741                                    u8 il4_proto, u32 *type_cs_vlan_tso,
 742                                    u32 *ol_type_vlan_len_msec)
 743 {
 744         union {
 745                 struct iphdr *v4;
 746                 struct ipv6hdr *v6;
 747                 unsigned char *hdr;
 748         } l3;
 749         u32 l4_proto = ol4_proto;
 750
 751         l3.hdr = skb_network_header(skb);
 752
 753         /* define OL3 type and tunnel type(OL4).*/
 754         if (skb->encapsulation) {
 755                 /* define outer network header type.*/
 756                 if (skb->protocol == htons(ETH_P_IP)) {
 757                         if (skb_is_gso(skb))
 758                                 hnae3_set_field(*ol_type_vlan_len_msec,
 759                                                 HNS3_TXD_OL3T_M,
 760                                                 HNS3_TXD_OL3T_S,
 761                                                 HNS3_OL3T_IPV4_CSUM);
 762                         else
 763                                 hnae3_set_field(*ol_type_vlan_len_msec,
 764                                                 HNS3_TXD_OL3T_M,
 765                                                 HNS3_TXD_OL3T_S,
 766                                                 HNS3_OL3T_IPV4_NO_CSUM);
 767
 768                 } else if (skb->protocol == htons(ETH_P_IPV6)) {
 769                         hnae3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_M,
 770                                         HNS3_TXD_OL3T_S, HNS3_OL3T_IPV6);
 771                 }
 772
 773                 /* define tunnel type(OL4).*/
 774                 switch (l4_proto) {
 775                 case IPPROTO_UDP:
 776                         hnae3_set_field(*ol_type_vlan_len_msec,
 777                                         HNS3_TXD_TUNTYPE_M,
 778                                         HNS3_TXD_TUNTYPE_S,
 779                                         HNS3_TUN_MAC_IN_UDP);
 780                         break;
 781                 case IPPROTO_GRE:
 782                         hnae3_set_field(*ol_type_vlan_len_msec,
 783                                         HNS3_TXD_TUNTYPE_M,
 784                                         HNS3_TXD_TUNTYPE_S,
 785                                         HNS3_TUN_NVGRE);
 786                         break;
 787                 default:
 788                         /* drop the skb tunnel packet if hardware don't support,
 789                          * because hardware can't calculate csum when TSO.
 790                          */
 791                         if (skb_is_gso(skb))
 792                                 return -EDOM;
 793
 794                         /* the stack computes the IP header already,
 795                          * driver calculate l4 checksum when not TSO.
 796                          */
 797                         skb_checksum_help(skb);
 798                         return 0;
 799                 }
 800
 801                 l3.hdr = skb_inner_network_header(skb);
 802                 l4_proto = il4_proto;
 803         }
 804
 805         if (l3.v4->version == 4) {
 806                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 807                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV4);
 808
 809                 /* the stack computes the IP header already, the only time we
 810                  * need the hardware to recompute it is in the case of TSO.
 811                  */
 812                 if (skb_is_gso(skb))
 813                         hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
 814         } else if (l3.v6->version == 6) {
 815                 hnae3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_M,
 816                                 HNS3_TXD_L3T_S, HNS3_L3T_IPV6);
 817         }
 818
 819         switch (l4_proto) {
 820         case IPPROTO_TCP:
 821                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 822                 hnae3_set_field(*type_cs_vlan_tso,
 823                                 HNS3_TXD_L4T_M,
 824                                 HNS3_TXD_L4T_S,
 825                                 HNS3_L4T_TCP);
 826                 break;
 827         case IPPROTO_UDP:
 828                 if (hns3_tunnel_csum_bug(skb))
 829                         break;
 830
 831                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 832                 hnae3_set_field(*type_cs_vlan_tso,
 833                                 HNS3_TXD_L4T_M,
 834                                 HNS3_TXD_L4T_S,
 835                                 HNS3_L4T_UDP);
 836                 break;
 837         case IPPROTO_SCTP:
 838                 hnae3_set_bit(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 839                 hnae3_set_field(*type_cs_vlan_tso,
 840                                 HNS3_TXD_L4T_M,
 841                                 HNS3_TXD_L4T_S,
 842                                 HNS3_L4T_SCTP);
 843                 break;
 844         default:
 845                 /* drop the skb tunnel packet if hardware don't support,
 846                  * because hardware can't calculate csum when TSO.
 847                  */
 848                 if (skb_is_gso(skb))
 849                         return -EDOM;
 850
 851                 /* the stack computes the IP header already,
 852                  * driver calculate l4 checksum when not TSO.
 853                  */
 854                 skb_checksum_help(skb);
 855                 return 0;
 856         }
 857
 858         return 0;
 859 }
 860
 861 static void hns3_set_txbd_baseinfo(u16 *bdtp_fe_sc_vld_ra_ri, int frag_end)
 862 {
 863         /* Config bd buffer end */
 864         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_BDTYPE_M,
 865                         HNS3_TXD_BDTYPE_S, 0);
 866         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_FE_B, !!frag_end);
 867         hnae3_set_bit(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_VLD_B, 1);
 868         hnae3_set_field(*bdtp_fe_sc_vld_ra_ri, HNS3_TXD_SC_M, HNS3_TXD_SC_S, 0);
 869 }
 870
 871 static int hns3_fill_desc_vtags(struct sk_buff *skb,
 872                                 struct hns3_enet_ring *tx_ring,
 873                                 u32 *inner_vlan_flag,
 874                                 u32 *out_vlan_flag,
 875                                 u16 *inner_vtag,
 876                                 u16 *out_vtag)
 877 {
 878 #define HNS3_TX_VLAN_PRIO_SHIFT 13
 879
 880         if (skb->protocol == htons(ETH_P_8021Q) &&
 881             !(tx_ring->tqp->handle->kinfo.netdev->features &
 882             NETIF_F_HW_VLAN_CTAG_TX)) {
 883                 /* When HW VLAN acceleration is turned off, and the stack
 884                  * sets the protocol to 802.1q, the driver just need to
 885                  * set the protocol to the encapsulated ethertype.
 886                  */
 887                 skb->protocol = vlan_get_protocol(skb);
 888                 return 0;
 889         }
 890
 891         if (skb_vlan_tag_present(skb)) {
 892                 u16 vlan_tag;
 893
 894                 vlan_tag = skb_vlan_tag_get(skb);
 895                 vlan_tag |= (skb->priority & 0x7) << HNS3_TX_VLAN_PRIO_SHIFT;
 896
 897                 /* Based on hw strategy, use out_vtag in two layer tag case,
 898                  * and use inner_vtag in one tag case.
 899                  */
 900                 if (skb->protocol == htons(ETH_P_8021Q)) {
 901                         hnae3_set_bit(*out_vlan_flag, HNS3_TXD_OVLAN_B, 1);
 902                         *out_vtag = vlan_tag;
 903                 } else {
 904                         hnae3_set_bit(*inner_vlan_flag, HNS3_TXD_VLAN_B, 1);
 905                         *inner_vtag = vlan_tag;
 906                 }
 907         } else if (skb->protocol == htons(ETH_P_8021Q)) {
 908                 struct vlan_ethhdr *vhdr;
 909                 int rc;
 910
 911                 rc = skb_cow_head(skb, 0);
 912                 if (rc < 0)
 913                         return rc;
 914                 vhdr = (struct vlan_ethhdr *)skb->data;
 915                 vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority & 0x7)
 916                                         << HNS3_TX_VLAN_PRIO_SHIFT);
 917         }
 918
 919         skb->protocol = vlan_get_protocol(skb);
 920         return 0;
 921 }
 922
 923 static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
 924                           int size, dma_addr_t dma, int frag_end,
 925                           enum hns_desc_type type)
 926 {
 927         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
 928         struct hns3_desc *desc = &ring->desc[ring->next_to_use];
 929         u32 ol_type_vlan_len_msec = 0;
 930         u16 bdtp_fe_sc_vld_ra_ri = 0;
 931         u32 type_cs_vlan_tso = 0;
 932         struct sk_buff *skb;
 933         u16 inner_vtag = 0;
 934         u16 out_vtag = 0;
 935         u32 paylen = 0;
 936         u16 mss = 0;
 937         u8 ol4_proto;
 938         u8 il4_proto;
 939         int ret;
 940
 941         /* The txbd's baseinfo of DESC_TYPE_PAGE & DESC_TYPE_SKB */
 942         desc_cb->priv = priv;
 943         desc_cb->length = size;
 944         desc_cb->dma = dma;
 945         desc_cb->type = type;
 946
 947         /* now, fill the descriptor */
 948         desc->addr = cpu_to_le64(dma);
 949         desc->tx.send_size = cpu_to_le16((u16)size);
 950         hns3_set_txbd_baseinfo(&bdtp_fe_sc_vld_ra_ri, frag_end);
 951         desc->tx.bdtp_fe_sc_vld_ra_ri = cpu_to_le16(bdtp_fe_sc_vld_ra_ri);
 952
 953         if (type == DESC_TYPE_SKB) {
 954                 skb = (struct sk_buff *)priv;
 955                 paylen = skb->len;
 956
 957                 ret = hns3_fill_desc_vtags(skb, ring, &type_cs_vlan_tso,
 958                                            &ol_type_vlan_len_msec,
 959                                            &inner_vtag, &out_vtag);
 960                 if (unlikely(ret))
 961                         return ret;
 962
 963                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 964                         skb_reset_mac_len(skb);
 965
 966                         ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
 967                         if (ret)
 968                                 return ret;
 969                         hns3_set_l2l3l4_len(skb, ol4_proto, il4_proto,
 970                                             &type_cs_vlan_tso,
 971                                             &ol_type_vlan_len_msec);
 972                         ret = hns3_set_l3l4_type_csum(skb, ol4_proto, il4_proto,
 973                                                       &type_cs_vlan_tso,
 974                                                       &ol_type_vlan_len_msec);
 975                         if (ret)
 976                                 return ret;
 977
 978                         ret = hns3_set_tso(skb, &paylen, &mss,
 979                                            &type_cs_vlan_tso);
 980                         if (ret)
 981                                 return ret;
 982                 }
 983
 984                 /* Set txbd */
 985                 desc->tx.ol_type_vlan_len_msec =
 986                         cpu_to_le32(ol_type_vlan_len_msec);
 987                 desc->tx.type_cs_vlan_tso_len =
 988                         cpu_to_le32(type_cs_vlan_tso);
 989                 desc->tx.paylen = cpu_to_le32(paylen);
 990                 desc->tx.mss = cpu_to_le16(mss);
 991                 desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
 992                 desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
 993         }
 994
 995         /* move ring pointer to next.*/
 996         ring_ptr_move_fw(ring, next_to_use);
 997
 998         return 0;
 999 }
1000
1001 static int hns3_fill_desc_tso(struct hns3_enet_ring *ring, void *priv,
1002                               int size, dma_addr_t dma, int frag_end,
1003                               enum hns_desc_type type)
1004 {
1005         unsigned int frag_buf_num;
1006         unsigned int k;
1007         int sizeoflast;
1008         int ret;
1009
1010         frag_buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1011         sizeoflast = size % HNS3_MAX_BD_SIZE;
1012         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1013
1014         /* When the frag size is bigger than hardware, split this frag */
1015         for (k = 0; k < frag_buf_num; k++) {
1016                 ret = hns3_fill_desc(ring, priv,
1017                                      (k == frag_buf_num - 1) ?
1018                                 sizeoflast : HNS3_MAX_BD_SIZE,
1019                                 dma + HNS3_MAX_BD_SIZE * k,
1020                                 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
1021                                 (type == DESC_TYPE_SKB && !k) ?
1022                                         DESC_TYPE_SKB : DESC_TYPE_PAGE);
1023                 if (ret)
1024                         return ret;
1025         }
1026
1027         return 0;
1028 }
1029
1030 static int hns3_nic_maybe_stop_tso(struct sk_buff **out_skb, int *bnum,
1031                                    struct hns3_enet_ring *ring)
1032 {
1033         struct sk_buff *skb = *out_skb;
1034         struct skb_frag_struct *frag;
1035         int bdnum_for_frag;
1036         int frag_num;
1037         int buf_num;
1038         int size;
1039         int i;
1040
1041         size = skb_headlen(skb);
1042         buf_num = (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1043
1044         frag_num = skb_shinfo(skb)->nr_frags;
1045         for (i = 0; i < frag_num; i++) {
1046                 frag = &skb_shinfo(skb)->frags[i];
1047                 size = skb_frag_size(frag);
1048                 bdnum_for_frag =
1049                         (size + HNS3_MAX_BD_SIZE - 1) / HNS3_MAX_BD_SIZE;
1050                 if (bdnum_for_frag > HNS3_MAX_BD_PER_FRAG)
1051                         return -ENOMEM;
1052
1053                 buf_num += bdnum_for_frag;
1054         }
1055
1056         if (buf_num > ring_space(ring))
1057                 return -EBUSY;
1058
1059         *bnum = buf_num;
1060         return 0;
1061 }
1062
1063 static int hns3_nic_maybe_stop_tx(struct sk_buff **out_skb, int *bnum,
1064                                   struct hns3_enet_ring *ring)
1065 {
1066         struct sk_buff *skb = *out_skb;
1067         int buf_num;
1068
1069         /* No. of segments (plus a header) */
1070         buf_num = skb_shinfo(skb)->nr_frags + 1;
1071
1072         if (unlikely(ring_space(ring) < buf_num))
1073                 return -EBUSY;
1074
1075         *bnum = buf_num;
1076
1077         return 0;
1078 }
1079
1080 static void hns_nic_dma_unmap(struct hns3_enet_ring *ring, int next_to_use_orig)
1081 {
1082         struct device *dev = ring_to_dev(ring);
1083         unsigned int i;
1084
1085         for (i = 0; i < ring->desc_num; i++) {
1086                 /* check if this is where we started */
1087                 if (ring->next_to_use == next_to_use_orig)
1088                         break;
1089
1090                 /* unmap the descriptor dma address */
1091                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB)
1092                         dma_unmap_single(dev,
1093                                          ring->desc_cb[ring->next_to_use].dma,
1094                                         ring->desc_cb[ring->next_to_use].length,
1095                                         DMA_TO_DEVICE);
1096                 else
1097                         dma_unmap_page(dev,
1098                                        ring->desc_cb[ring->next_to_use].dma,
1099                                        ring->desc_cb[ring->next_to_use].length,
1100                                        DMA_TO_DEVICE);
1101
1102                 /* rollback one */
1103                 ring_ptr_move_bw(ring, next_to_use);
1104         }
1105 }
1106
1107 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1108 {
1109         struct hns3_nic_priv *priv = netdev_priv(netdev);
1110         struct hns3_nic_ring_data *ring_data =
1111                 &tx_ring_data(priv, skb->queue_mapping);
1112         struct hns3_enet_ring *ring = ring_data->ring;
1113         struct device *dev = priv->dev;
1114         struct netdev_queue *dev_queue;
1115         struct skb_frag_struct *frag;
1116         int next_to_use_head;
1117         int next_to_use_frag;
1118         dma_addr_t dma;
1119         int buf_num;
1120         int seg_num;
1121         int size;
1122         int ret;
1123         int i;
1124
1125         /* Prefetch the data used later */
1126         prefetch(skb->data);
1127
1128         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
1129         case -EBUSY:
1130                 u64_stats_update_begin(&ring->syncp);
1131                 ring->stats.tx_busy++;
1132                 u64_stats_update_end(&ring->syncp);
1133
1134                 goto out_net_tx_busy;
1135         case -ENOMEM:
1136                 u64_stats_update_begin(&ring->syncp);
1137                 ring->stats.sw_err_cnt++;
1138                 u64_stats_update_end(&ring->syncp);
1139                 netdev_err(netdev, "no memory to xmit!\n");
1140
1141                 goto out_err_tx_ok;
1142         default:
1143                 break;
1144         }
1145
1146         /* No. of segments (plus a header) */
1147         seg_num = skb_shinfo(skb)->nr_frags + 1;
1148         /* Fill the first part */
1149         size = skb_headlen(skb);
1150
1151         next_to_use_head = ring->next_to_use;
1152
1153         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1154         if (dma_mapping_error(dev, dma)) {
1155                 netdev_err(netdev, "TX head DMA map failed\n");
1156                 ring->stats.sw_err_cnt++;
1157                 goto out_err_tx_ok;
1158         }
1159
1160         ret = priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
1161                            DESC_TYPE_SKB);
1162         if (ret)
1163                 goto head_dma_map_err;
1164
1165         next_to_use_frag = ring->next_to_use;
1166         /* Fill the fragments */
1167         for (i = 1; i < seg_num; i++) {
1168                 frag = &skb_shinfo(skb)->frags[i - 1];
1169                 size = skb_frag_size(frag);
1170                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1171                 if (dma_mapping_error(dev, dma)) {
1172                         netdev_err(netdev, "TX frag(%d) DMA map failed\n", i);
1173                         ring->stats.sw_err_cnt++;
1174                         goto frag_dma_map_err;
1175                 }
1176                 ret = priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
1177                                     seg_num - 1 == i ? 1 : 0,
1178                                     DESC_TYPE_PAGE);
1179
1180                 if (ret)
1181                         goto frag_dma_map_err;
1182         }
1183
1184         /* Complete translate all packets */
1185         dev_queue = netdev_get_tx_queue(netdev, ring_data->queue_index);
1186         netdev_tx_sent_queue(dev_queue, skb->len);
1187
1188         wmb(); /* Commit all data before submit */
1189
1190         hnae3_queue_xmit(ring->tqp, buf_num);
1191
1192         return NETDEV_TX_OK;
1193
1194 frag_dma_map_err:
1195         hns_nic_dma_unmap(ring, next_to_use_frag);
1196
1197 head_dma_map_err:
1198         hns_nic_dma_unmap(ring, next_to_use_head);
1199
1200 out_err_tx_ok:
1201         dev_kfree_skb_any(skb);
1202         return NETDEV_TX_OK;
1203
1204 out_net_tx_busy:
1205         netif_stop_subqueue(netdev, ring_data->queue_index);
1206         smp_mb(); /* Commit all data before submit */
1207
1208         return NETDEV_TX_BUSY;
1209 }
1210
1211 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1212 {
1213         struct hnae3_handle *h = hns3_get_handle(netdev);
1214         struct sockaddr *mac_addr = p;
1215         int ret;
1216
1217         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1218                 return -EADDRNOTAVAIL;
1219
1220         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1221                 netdev_info(netdev, "already using mac address %pM\n",
1222                             mac_addr->sa_data);
1223                 return 0;
1224         }
1225
1226         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1227         if (ret) {
1228                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1229                 return ret;
1230         }
1231
1232         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1233
1234         return 0;
1235 }
1236
1237 static int hns3_nic_do_ioctl(struct net_device *netdev,
1238                              struct ifreq *ifr, int cmd)
1239 {
1240         struct hnae3_handle *h = hns3_get_handle(netdev);
1241
1242         if (!netif_running(netdev))
1243                 return -EINVAL;
1244
1245         if (!h->ae_algo->ops->do_ioctl)
1246                 return -EOPNOTSUPP;
1247
1248         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1249 }
1250
1251 static int hns3_nic_set_features(struct net_device *netdev,
1252                                  netdev_features_t features)
1253 {
1254         netdev_features_t changed = netdev->features ^ features;
1255         struct hns3_nic_priv *priv = netdev_priv(netdev);
1256         struct hnae3_handle *h = priv->ae_handle;
1257         int ret;
1258
1259         if (changed & (NETIF_F_TSO | NETIF_F_TSO6)) {
1260                 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1261                         priv->ops.fill_desc = hns3_fill_desc_tso;
1262                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
1263                 } else {
1264                         priv->ops.fill_desc = hns3_fill_desc;
1265                         priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
1266                 }
1267         }
1268
1269         if ((changed & NETIF_F_HW_VLAN_CTAG_FILTER) &&
1270             h->ae_algo->ops->enable_vlan_filter) {
1271                 if (features & NETIF_F_HW_VLAN_CTAG_FILTER)
1272                         h->ae_algo->ops->enable_vlan_filter(h, true);
1273                 else
1274                         h->ae_algo->ops->enable_vlan_filter(h, false);
1275         }
1276
1277         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1278             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1279                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
1280                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, true);
1281                 else
1282                         ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, false);
1283
1284                 if (ret)
1285                         return ret;
1286         }
1287
1288         netdev->features = features;
1289         return 0;
1290 }
1291
1292 static void hns3_nic_get_stats64(struct net_device *netdev,
1293                                  struct rtnl_link_stats64 *stats)
1294 {
1295         struct hns3_nic_priv *priv = netdev_priv(netdev);
1296         int queue_num = priv->ae_handle->kinfo.num_tqps;
1297         struct hnae3_handle *handle = priv->ae_handle;
1298         struct hns3_enet_ring *ring;
1299         unsigned int start;
1300         unsigned int idx;
1301         u64 tx_bytes = 0;
1302         u64 rx_bytes = 0;
1303         u64 tx_pkts = 0;
1304         u64 rx_pkts = 0;
1305         u64 tx_drop = 0;
1306         u64 rx_drop = 0;
1307
1308         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1309                 return;
1310
1311         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1312
1313         for (idx = 0; idx < queue_num; idx++) {
1314                 /* fetch the tx stats */
1315                 ring = priv->ring_data[idx].ring;
1316                 do {
1317                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1318                         tx_bytes += ring->stats.tx_bytes;
1319                         tx_pkts += ring->stats.tx_pkts;
1320                         tx_drop += ring->stats.tx_busy;
1321                         tx_drop += ring->stats.sw_err_cnt;
1322                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1323
1324                 /* fetch the rx stats */
1325                 ring = priv->ring_data[idx + queue_num].ring;
1326                 do {
1327                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1328                         rx_bytes += ring->stats.rx_bytes;
1329                         rx_pkts += ring->stats.rx_pkts;
1330                         rx_drop += ring->stats.non_vld_descs;
1331                         rx_drop += ring->stats.err_pkt_len;
1332                         rx_drop += ring->stats.l2_err;
1333                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1334         }
1335
1336         stats->tx_bytes = tx_bytes;
1337         stats->tx_packets = tx_pkts;
1338         stats->rx_bytes = rx_bytes;
1339         stats->rx_packets = rx_pkts;
1340
1341         stats->rx_errors = netdev->stats.rx_errors;
1342         stats->multicast = netdev->stats.multicast;
1343         stats->rx_length_errors = netdev->stats.rx_length_errors;
1344         stats->rx_crc_errors = netdev->stats.rx_crc_errors;
1345         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1346
1347         stats->tx_errors = netdev->stats.tx_errors;
1348         stats->rx_dropped = rx_drop + netdev->stats.rx_dropped;
1349         stats->tx_dropped = tx_drop + netdev->stats.tx_dropped;
1350         stats->collisions = netdev->stats.collisions;
1351         stats->rx_over_errors = netdev->stats.rx_over_errors;
1352         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1353         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1354         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1355         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1356         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1357         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1358         stats->tx_window_errors = netdev->stats.tx_window_errors;
1359         stats->rx_compressed = netdev->stats.rx_compressed;
1360         stats->tx_compressed = netdev->stats.tx_compressed;
1361 }
1362
1363 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1364 {
1365         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1366         struct hnae3_handle *h = hns3_get_handle(netdev);
1367         struct hnae3_knic_private_info *kinfo = &h->kinfo;
1368         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1369         u8 tc = mqprio_qopt->qopt.num_tc;
1370         u16 mode = mqprio_qopt->mode;
1371         u8 hw = mqprio_qopt->qopt.hw;
1372         bool if_running;
1373         int ret;
1374
1375         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1376                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1377                 return -EOPNOTSUPP;
1378
1379         if (tc > HNAE3_MAX_TC)
1380                 return -EINVAL;
1381
1382         if (!netdev)
1383                 return -EINVAL;
1384
1385         if_running = netif_running(netdev);
1386         if (if_running) {
1387                 hns3_nic_net_stop(netdev);
1388                 msleep(100);
1389         }
1390
1391         ret = (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1392                 kinfo->dcb_ops->setup_tc(h, tc, prio_tc) : -EOPNOTSUPP;
1393         if (ret)
1394                 goto out;
1395
1396         ret = hns3_nic_set_real_num_queue(netdev);
1397
1398 out:
1399         if (if_running)
1400                 hns3_nic_net_open(netdev);
1401
1402         return ret;
1403 }
1404
1405 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1406                              void *type_data)
1407 {
1408         if (type != TC_SETUP_QDISC_MQPRIO)
1409                 return -EOPNOTSUPP;
1410
1411         return hns3_setup_tc(dev, type_data);
1412 }
1413
1414 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1415                                 __be16 proto, u16 vid)
1416 {
1417         struct hnae3_handle *h = hns3_get_handle(netdev);
1418         struct hns3_nic_priv *priv = netdev_priv(netdev);
1419         int ret = -EIO;
1420
1421         if (h->ae_algo->ops->set_vlan_filter)
1422                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1423
1424         if (!ret)
1425                 set_bit(vid, priv->active_vlans);
1426
1427         return ret;
1428 }
1429
1430 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1431                                  __be16 proto, u16 vid)
1432 {
1433         struct hnae3_handle *h = hns3_get_handle(netdev);
1434         struct hns3_nic_priv *priv = netdev_priv(netdev);
1435         int ret = -EIO;
1436
1437         if (h->ae_algo->ops->set_vlan_filter)
1438                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1439
1440         if (!ret)
1441                 clear_bit(vid, priv->active_vlans);
1442
1443         return ret;
1444 }
1445
1446 static void hns3_restore_vlan(struct net_device *netdev)
1447 {
1448         struct hns3_nic_priv *priv = netdev_priv(netdev);
1449         u16 vid;
1450         int ret;
1451
1452         for_each_set_bit(vid, priv->active_vlans, VLAN_N_VID) {
1453                 ret = hns3_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
1454                 if (ret)
1455                         netdev_warn(netdev, "Restore vlan: %d filter, ret:%d\n",
1456                                     vid, ret);
1457         }
1458 }
1459
1460 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1461                                 u8 qos, __be16 vlan_proto)
1462 {
1463         struct hnae3_handle *h = hns3_get_handle(netdev);
1464         int ret = -EIO;
1465
1466         if (h->ae_algo->ops->set_vf_vlan_filter)
1467                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1468                                                    qos, vlan_proto);
1469
1470         return ret;
1471 }
1472
1473 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1474 {
1475         struct hnae3_handle *h = hns3_get_handle(netdev);
1476         bool if_running = netif_running(netdev);
1477         int ret;
1478
1479         if (!h->ae_algo->ops->set_mtu)
1480                 return -EOPNOTSUPP;
1481
1482         /* if this was called with netdev up then bring netdevice down */
1483         if (if_running) {
1484                 (void)hns3_nic_net_stop(netdev);
1485                 msleep(100);
1486         }
1487
1488         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1489         if (ret)
1490                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1491                            ret);
1492         else
1493                 netdev->mtu = new_mtu;
1494
1495         /* if the netdev was running earlier, bring it up again */
1496         if (if_running && hns3_nic_net_open(netdev))
1497                 ret = -EINVAL;
1498
1499         return ret;
1500 }
1501
1502 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1503 {
1504         struct hns3_nic_priv *priv = netdev_priv(ndev);
1505         struct hns3_enet_ring *tx_ring = NULL;
1506         int timeout_queue = 0;
1507         int hw_head, hw_tail;
1508         int i;
1509
1510         /* Find the stopped queue the same way the stack does */
1511         for (i = 0; i < ndev->real_num_tx_queues; i++) {
1512                 struct netdev_queue *q;
1513                 unsigned long trans_start;
1514
1515                 q = netdev_get_tx_queue(ndev, i);
1516                 trans_start = q->trans_start;
1517                 if (netif_xmit_stopped(q) &&
1518                     time_after(jiffies,
1519                                (trans_start + ndev->watchdog_timeo))) {
1520                         timeout_queue = i;
1521                         break;
1522                 }
1523         }
1524
1525         if (i == ndev->num_tx_queues) {
1526                 netdev_info(ndev,
1527                             "no netdev TX timeout queue found, timeout count: %llu\n",
1528                             priv->tx_timeout_count);
1529                 return false;
1530         }
1531
1532         tx_ring = priv->ring_data[timeout_queue].ring;
1533
1534         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1535                                 HNS3_RING_TX_RING_HEAD_REG);
1536         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1537                                 HNS3_RING_TX_RING_TAIL_REG);
1538         netdev_info(ndev,
1539                     "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",
1540                     priv->tx_timeout_count,
1541                     timeout_queue,
1542                     tx_ring->next_to_use,
1543                     tx_ring->next_to_clean,
1544                     hw_head,
1545                     hw_tail,
1546                     readl(tx_ring->tqp_vector->mask_addr));
1547
1548         return true;
1549 }
1550
1551 static void hns3_nic_net_timeout(struct net_device *ndev)
1552 {
1553         struct hns3_nic_priv *priv = netdev_priv(ndev);
1554         struct hnae3_handle *h = priv->ae_handle;
1555
1556         if (!hns3_get_tx_timeo_queue_info(ndev))
1557                 return;
1558
1559         priv->tx_timeout_count++;
1560
1561         if (time_before(jiffies, (h->last_reset_time + ndev->watchdog_timeo)))
1562                 return;
1563
1564         /* request the reset */
1565         if (h->ae_algo->ops->reset_event)
1566                 h->ae_algo->ops->reset_event(h);
1567 }
1568
1569 static const struct net_device_ops hns3_nic_netdev_ops = {
1570         .ndo_open               = hns3_nic_net_open,
1571         .ndo_stop               = hns3_nic_net_stop,
1572         .ndo_start_xmit         = hns3_nic_net_xmit,
1573         .ndo_tx_timeout         = hns3_nic_net_timeout,
1574         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
1575         .ndo_do_ioctl           = hns3_nic_do_ioctl,
1576         .ndo_change_mtu         = hns3_nic_change_mtu,
1577         .ndo_set_features       = hns3_nic_set_features,
1578         .ndo_get_stats64        = hns3_nic_get_stats64,
1579         .ndo_setup_tc           = hns3_nic_setup_tc,
1580         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
1581         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
1582         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
1583         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
1584 };
1585
1586 static bool hns3_is_phys_func(struct pci_dev *pdev)
1587 {
1588         u32 dev_id = pdev->device;
1589
1590         switch (dev_id) {
1591         case HNAE3_DEV_ID_GE:
1592         case HNAE3_DEV_ID_25GE:
1593         case HNAE3_DEV_ID_25GE_RDMA:
1594         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
1595         case HNAE3_DEV_ID_50GE_RDMA:
1596         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
1597         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
1598                 return true;
1599         case HNAE3_DEV_ID_100G_VF:
1600         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
1601                 return false;
1602         default:
1603                 dev_warn(&pdev->dev, "un-recognized pci device-id %d",
1604                          dev_id);
1605         }
1606
1607         return false;
1608 }
1609
1610 static void hns3_disable_sriov(struct pci_dev *pdev)
1611 {
1612         /* If our VFs are assigned we cannot shut down SR-IOV
1613          * without causing issues, so just leave the hardware
1614          * available but disabled
1615          */
1616         if (pci_vfs_assigned(pdev)) {
1617                 dev_warn(&pdev->dev,
1618                          "disabling driver while VFs are assigned\n");
1619                 return;
1620         }
1621
1622         pci_disable_sriov(pdev);
1623 }
1624
1625 static void hns3_get_dev_capability(struct pci_dev *pdev,
1626                                     struct hnae3_ae_dev *ae_dev)
1627 {
1628         if (pdev->revision >= 0x21)
1629                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
1630 }
1631
1632 /* hns3_probe - Device initialization routine
1633  * @pdev: PCI device information struct
1634  * @ent: entry in hns3_pci_tbl
1635  *
1636  * hns3_probe initializes a PF identified by a pci_dev structure.
1637  * The OS initialization, configuring of the PF private structure,
1638  * and a hardware reset occur.
1639  *
1640  * Returns 0 on success, negative on failure
1641  */
1642 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1643 {
1644         struct hnae3_ae_dev *ae_dev;
1645         int ret;
1646
1647         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev),
1648                               GFP_KERNEL);
1649         if (!ae_dev) {
1650                 ret = -ENOMEM;
1651                 return ret;
1652         }
1653
1654         ae_dev->pdev = pdev;
1655         ae_dev->flag = ent->driver_data;
1656         ae_dev->dev_type = HNAE3_DEV_KNIC;
1657         hns3_get_dev_capability(pdev, ae_dev);
1658         pci_set_drvdata(pdev, ae_dev);
1659
1660         hnae3_register_ae_dev(ae_dev);
1661
1662         return 0;
1663 }
1664
1665 /* hns3_remove - Device removal routine
1666  * @pdev: PCI device information struct
1667  */
1668 static void hns3_remove(struct pci_dev *pdev)
1669 {
1670         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1671
1672         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
1673                 hns3_disable_sriov(pdev);
1674
1675         hnae3_unregister_ae_dev(ae_dev);
1676 }
1677
1678 /**
1679  * hns3_pci_sriov_configure
1680  * @pdev: pointer to a pci_dev structure
1681  * @num_vfs: number of VFs to allocate
1682  *
1683  * Enable or change the number of VFs. Called when the user updates the number
1684  * of VFs in sysfs.
1685  **/
1686 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
1687 {
1688         int ret;
1689
1690         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
1691                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
1692                 return -EINVAL;
1693         }
1694
1695         if (num_vfs) {
1696                 ret = pci_enable_sriov(pdev, num_vfs);
1697                 if (ret)
1698                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
1699                 else
1700                         return num_vfs;
1701         } else if (!pci_vfs_assigned(pdev)) {
1702                 pci_disable_sriov(pdev);
1703         } else {
1704                 dev_warn(&pdev->dev,
1705                          "Unable to free VFs because some are assigned to VMs.\n");
1706         }
1707
1708         return 0;
1709 }
1710
1711 static void hns3_shutdown(struct pci_dev *pdev)
1712 {
1713         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
1714
1715         hnae3_unregister_ae_dev(ae_dev);
1716         devm_kfree(&pdev->dev, ae_dev);
1717         pci_set_drvdata(pdev, NULL);
1718
1719         if (system_state == SYSTEM_POWER_OFF)
1720                 pci_set_power_state(pdev, PCI_D3hot);
1721 }
1722
1723 static struct pci_driver hns3_driver = {
1724         .name     = hns3_driver_name,
1725         .id_table = hns3_pci_tbl,
1726         .probe    = hns3_probe,
1727         .remove   = hns3_remove,
1728         .shutdown = hns3_shutdown,
1729         .sriov_configure = hns3_pci_sriov_configure,
1730 };
1731
1732 /* set default feature to hns3 */
1733 static void hns3_set_default_feature(struct net_device *netdev)
1734 {
1735         struct hnae3_handle *h = hns3_get_handle(netdev);
1736         struct pci_dev *pdev = h->pdev;
1737
1738         netdev->priv_flags |= IFF_UNICAST_FLT;
1739
1740         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1741                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1742                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1743                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1744                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1745
1746         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
1747
1748         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
1749
1750         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1751                 NETIF_F_HW_VLAN_CTAG_FILTER |
1752                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1753                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1754                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1755                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1756                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1757
1758         netdev->vlan_features |=
1759                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
1760                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
1761                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1762                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1763                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1764
1765         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1766                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
1767                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1768                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
1769                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
1770                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC;
1771
1772         if (pdev->revision != 0x20)
1773                 netdev->hw_features |= NETIF_F_HW_VLAN_CTAG_FILTER;
1774 }
1775
1776 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
1777                              struct hns3_desc_cb *cb)
1778 {
1779         unsigned int order = hnae3_page_order(ring);
1780         struct page *p;
1781
1782         p = dev_alloc_pages(order);
1783         if (!p)
1784                 return -ENOMEM;
1785
1786         cb->priv = p;
1787         cb->page_offset = 0;
1788         cb->reuse_flag = 0;
1789         cb->buf  = page_address(p);
1790         cb->length = hnae3_page_size(ring);
1791         cb->type = DESC_TYPE_PAGE;
1792
1793         return 0;
1794 }
1795
1796 static void hns3_free_buffer(struct hns3_enet_ring *ring,
1797                              struct hns3_desc_cb *cb)
1798 {
1799         if (cb->type == DESC_TYPE_SKB)
1800                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
1801         else if (!HNAE3_IS_TX_RING(ring))
1802                 put_page((struct page *)cb->priv);
1803         memset(cb, 0, sizeof(*cb));
1804 }
1805
1806 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
1807 {
1808         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
1809                                cb->length, ring_to_dma_dir(ring));
1810
1811         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
1812                 return -EIO;
1813
1814         return 0;
1815 }
1816
1817 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
1818                               struct hns3_desc_cb *cb)
1819 {
1820         if (cb->type == DESC_TYPE_SKB)
1821                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
1822                                  ring_to_dma_dir(ring));
1823         else
1824                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
1825                                ring_to_dma_dir(ring));
1826 }
1827
1828 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
1829 {
1830         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
1831         ring->desc[i].addr = 0;
1832 }
1833
1834 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
1835 {
1836         struct hns3_desc_cb *cb = &ring->desc_cb[i];
1837
1838         if (!ring->desc_cb[i].dma)
1839                 return;
1840
1841         hns3_buffer_detach(ring, i);
1842         hns3_free_buffer(ring, cb);
1843 }
1844
1845 static void hns3_free_buffers(struct hns3_enet_ring *ring)
1846 {
1847         int i;
1848
1849         for (i = 0; i < ring->desc_num; i++)
1850                 hns3_free_buffer_detach(ring, i);
1851 }
1852
1853 /* free desc along with its attached buffer */
1854 static void hns3_free_desc(struct hns3_enet_ring *ring)
1855 {
1856         int size = ring->desc_num * sizeof(ring->desc[0]);
1857
1858         hns3_free_buffers(ring);
1859
1860         if (ring->desc) {
1861                 dma_free_coherent(ring_to_dev(ring), size,
1862                                   ring->desc, ring->desc_dma_addr);
1863                 ring->desc = NULL;
1864         }
1865 }
1866
1867 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
1868 {
1869         int size = ring->desc_num * sizeof(ring->desc[0]);
1870
1871         ring->desc = dma_zalloc_coherent(ring_to_dev(ring), size,
1872                                          &ring->desc_dma_addr,
1873                                          GFP_KERNEL);
1874         if (!ring->desc)
1875                 return -ENOMEM;
1876
1877         return 0;
1878 }
1879
1880 static int hns3_reserve_buffer_map(struct hns3_enet_ring *ring,
1881                                    struct hns3_desc_cb *cb)
1882 {
1883         int ret;
1884
1885         ret = hns3_alloc_buffer(ring, cb);
1886         if (ret)
1887                 goto out;
1888
1889         ret = hns3_map_buffer(ring, cb);
1890         if (ret)
1891                 goto out_with_buf;
1892
1893         return 0;
1894
1895 out_with_buf:
1896         hns3_free_buffer(ring, cb);
1897 out:
1898         return ret;
1899 }
1900
1901 static int hns3_alloc_buffer_attach(struct hns3_enet_ring *ring, int i)
1902 {
1903         int ret = hns3_reserve_buffer_map(ring, &ring->desc_cb[i]);
1904
1905         if (ret)
1906                 return ret;
1907
1908         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
1909
1910         return 0;
1911 }
1912
1913 /* Allocate memory for raw pkg, and map with dma */
1914 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
1915 {
1916         int i, j, ret;
1917
1918         for (i = 0; i < ring->desc_num; i++) {
1919                 ret = hns3_alloc_buffer_attach(ring, i);
1920                 if (ret)
1921                         goto out_buffer_fail;
1922         }
1923
1924         return 0;
1925
1926 out_buffer_fail:
1927         for (j = i - 1; j >= 0; j--)
1928                 hns3_free_buffer_detach(ring, j);
1929         return ret;
1930 }
1931
1932 /* detach a in-used buffer and replace with a reserved one  */
1933 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
1934                                 struct hns3_desc_cb *res_cb)
1935 {
1936         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
1937         ring->desc_cb[i] = *res_cb;
1938         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
1939         ring->desc[i].rx.bd_base_info = 0;
1940 }
1941
1942 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
1943 {
1944         ring->desc_cb[i].reuse_flag = 0;
1945         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma
1946                 + ring->desc_cb[i].page_offset);
1947         ring->desc[i].rx.bd_base_info = 0;
1948 }
1949
1950 static void hns3_nic_reclaim_one_desc(struct hns3_enet_ring *ring, int *bytes,
1951                                       int *pkts)
1952 {
1953         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
1954
1955         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
1956         (*bytes) += desc_cb->length;
1957         /* desc_cb will be cleaned, after hnae3_free_buffer_detach*/
1958         hns3_free_buffer_detach(ring, ring->next_to_clean);
1959
1960         ring_ptr_move_fw(ring, next_to_clean);
1961 }
1962
1963 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
1964 {
1965         int u = ring->next_to_use;
1966         int c = ring->next_to_clean;
1967
1968         if (unlikely(h > ring->desc_num))
1969                 return 0;
1970
1971         return u > c ? (h > c && h <= u) : (h > c || h <= u);
1972 }
1973
1974 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
1975 {
1976         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
1977         struct hns3_nic_priv *priv = netdev_priv(netdev);
1978         struct netdev_queue *dev_queue;
1979         int bytes, pkts;
1980         int head;
1981
1982         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
1983         rmb(); /* Make sure head is ready before touch any data */
1984
1985         if (is_ring_empty(ring) || head == ring->next_to_clean)
1986                 return; /* no data to poll */
1987
1988         if (unlikely(!is_valid_clean_head(ring, head))) {
1989                 netdev_err(netdev, "wrong head (%d, %d-%d)\n", head,
1990                            ring->next_to_use, ring->next_to_clean);
1991
1992                 u64_stats_update_begin(&ring->syncp);
1993                 ring->stats.io_err_cnt++;
1994                 u64_stats_update_end(&ring->syncp);
1995                 return;
1996         }
1997
1998         bytes = 0;
1999         pkts = 0;
2000         while (head != ring->next_to_clean) {
2001                 hns3_nic_reclaim_one_desc(ring, &bytes, &pkts);
2002                 /* Issue prefetch for next Tx descriptor */
2003                 prefetch(&ring->desc_cb[ring->next_to_clean]);
2004         }
2005
2006         ring->tqp_vector->tx_group.total_bytes += bytes;
2007         ring->tqp_vector->tx_group.total_packets += pkts;
2008
2009         u64_stats_update_begin(&ring->syncp);
2010         ring->stats.tx_bytes += bytes;
2011         ring->stats.tx_pkts += pkts;
2012         u64_stats_update_end(&ring->syncp);
2013
2014         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2015         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2016
2017         if (unlikely(pkts && netif_carrier_ok(netdev) &&
2018                      (ring_space(ring) > HNS3_MAX_BD_PER_PKT))) {
2019                 /* Make sure that anybody stopping the queue after this
2020                  * sees the new next_to_clean.
2021                  */
2022                 smp_mb();
2023                 if (netif_tx_queue_stopped(dev_queue) &&
2024                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2025                         netif_tx_wake_queue(dev_queue);
2026                         ring->stats.restart_queue++;
2027                 }
2028         }
2029 }
2030
2031 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2032 {
2033         int ntc = ring->next_to_clean;
2034         int ntu = ring->next_to_use;
2035
2036         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2037 }
2038
2039 static void
2040 hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring, int cleand_count)
2041 {
2042         struct hns3_desc_cb *desc_cb;
2043         struct hns3_desc_cb res_cbs;
2044         int i, ret;
2045
2046         for (i = 0; i < cleand_count; i++) {
2047                 desc_cb = &ring->desc_cb[ring->next_to_use];
2048                 if (desc_cb->reuse_flag) {
2049                         u64_stats_update_begin(&ring->syncp);
2050                         ring->stats.reuse_pg_cnt++;
2051                         u64_stats_update_end(&ring->syncp);
2052
2053                         hns3_reuse_buffer(ring, ring->next_to_use);
2054                 } else {
2055                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
2056                         if (ret) {
2057                                 u64_stats_update_begin(&ring->syncp);
2058                                 ring->stats.sw_err_cnt++;
2059                                 u64_stats_update_end(&ring->syncp);
2060
2061                                 netdev_err(ring->tqp->handle->kinfo.netdev,
2062                                            "hnae reserve buffer map failed.\n");
2063                                 break;
2064                         }
2065                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2066                 }
2067
2068                 ring_ptr_move_fw(ring, next_to_use);
2069         }
2070
2071         wmb(); /* Make all data has been write before submit */
2072         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2073 }
2074
2075 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2076                                 struct hns3_enet_ring *ring, int pull_len,
2077                                 struct hns3_desc_cb *desc_cb)
2078 {
2079         struct hns3_desc *desc;
2080         u32 truesize;
2081         int size;
2082         int last_offset;
2083         bool twobufs;
2084
2085         twobufs = ((PAGE_SIZE < 8192) &&
2086                 hnae3_buf_size(ring) == HNS3_BUFFER_SIZE_2048);
2087
2088         desc = &ring->desc[ring->next_to_clean];
2089         size = le16_to_cpu(desc->rx.size);
2090
2091         truesize = hnae3_buf_size(ring);
2092
2093         if (!twobufs)
2094                 last_offset = hnae3_page_size(ring) - hnae3_buf_size(ring);
2095
2096         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2097                         size - pull_len, truesize);
2098
2099          /* Avoid re-using remote pages,flag default unreuse */
2100         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
2101                 return;
2102
2103         if (twobufs) {
2104                 /* If we are only owner of page we can reuse it */
2105                 if (likely(page_count(desc_cb->priv) == 1)) {
2106                         /* Flip page offset to other buffer */
2107                         desc_cb->page_offset ^= truesize;
2108
2109                         desc_cb->reuse_flag = 1;
2110                         /* bump ref count on page before it is given*/
2111                         get_page(desc_cb->priv);
2112                 }
2113                 return;
2114         }
2115
2116         /* Move offset up to the next cache line */
2117         desc_cb->page_offset += truesize;
2118
2119         if (desc_cb->page_offset <= last_offset) {
2120                 desc_cb->reuse_flag = 1;
2121                 /* Bump ref count on page before it is given*/
2122                 get_page(desc_cb->priv);
2123         }
2124 }
2125
2126 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2127                              struct hns3_desc *desc)
2128 {
2129         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2130         int l3_type, l4_type;
2131         u32 bd_base_info;
2132         int ol4_type;
2133         u32 l234info;
2134
2135         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2136         l234info = le32_to_cpu(desc->rx.l234_info);
2137
2138         skb->ip_summed = CHECKSUM_NONE;
2139
2140         skb_checksum_none_assert(skb);
2141
2142         if (!(netdev->features & NETIF_F_RXCSUM))
2143                 return;
2144
2145         /* check if hardware has done checksum */
2146         if (!hnae3_get_bit(bd_base_info, HNS3_RXD_L3L4P_B))
2147                 return;
2148
2149         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L3E_B) ||
2150                      hnae3_get_bit(l234info, HNS3_RXD_L4E_B) ||
2151                      hnae3_get_bit(l234info, HNS3_RXD_OL3E_B) ||
2152                      hnae3_get_bit(l234info, HNS3_RXD_OL4E_B))) {
2153                 u64_stats_update_begin(&ring->syncp);
2154                 ring->stats.l3l4_csum_err++;
2155                 u64_stats_update_end(&ring->syncp);
2156
2157                 return;
2158         }
2159
2160         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2161                                   HNS3_RXD_L3ID_S);
2162         l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2163                                   HNS3_RXD_L4ID_S);
2164
2165         ol4_type = hnae3_get_field(l234info, HNS3_RXD_OL4ID_M,
2166                                    HNS3_RXD_OL4ID_S);
2167         switch (ol4_type) {
2168         case HNS3_OL4_TYPE_MAC_IN_UDP:
2169         case HNS3_OL4_TYPE_NVGRE:
2170                 skb->csum_level = 1;
2171                 /* fall through */
2172         case HNS3_OL4_TYPE_NO_TUN:
2173                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2174                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2175                      l3_type == HNS3_L3_TYPE_IPV6) &&
2176                     (l4_type == HNS3_L4_TYPE_UDP ||
2177                      l4_type == HNS3_L4_TYPE_TCP ||
2178                      l4_type == HNS3_L4_TYPE_SCTP))
2179                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2180                 break;
2181         default:
2182                 break;
2183         }
2184 }
2185
2186 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2187 {
2188         napi_gro_receive(&ring->tqp_vector->napi, skb);
2189 }
2190
2191 static u16 hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2192                                struct hns3_desc *desc, u32 l234info)
2193 {
2194         struct pci_dev *pdev = ring->tqp->handle->pdev;
2195         u16 vlan_tag;
2196
2197         if (pdev->revision == 0x20) {
2198                 vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2199                 if (!(vlan_tag & VLAN_VID_MASK))
2200                         vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2201
2202                 return vlan_tag;
2203         }
2204
2205 #define HNS3_STRP_OUTER_VLAN    0x1
2206 #define HNS3_STRP_INNER_VLAN    0x2
2207
2208         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2209                                 HNS3_RXD_STRP_TAGP_S)) {
2210         case HNS3_STRP_OUTER_VLAN:
2211                 vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2212                 break;
2213         case HNS3_STRP_INNER_VLAN:
2214                 vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2215                 break;
2216         default:
2217                 vlan_tag = 0;
2218                 break;
2219         }
2220
2221         return vlan_tag;
2222 }
2223
2224 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
2225                              struct sk_buff **out_skb, int *out_bnum)
2226 {
2227         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2228         struct hns3_desc_cb *desc_cb;
2229         struct hns3_desc *desc;
2230         struct sk_buff *skb;
2231         unsigned char *va;
2232         u32 bd_base_info;
2233         int pull_len;
2234         u32 l234info;
2235         int length;
2236         int bnum;
2237
2238         desc = &ring->desc[ring->next_to_clean];
2239         desc_cb = &ring->desc_cb[ring->next_to_clean];
2240
2241         prefetch(desc);
2242
2243         length = le16_to_cpu(desc->rx.size);
2244         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2245
2246         /* Check valid BD */
2247         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
2248                 return -EFAULT;
2249
2250         va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
2251
2252         /* Prefetch first cache line of first page
2253          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
2254          * line size is 64B so need to prefetch twice to make it 128B. But in
2255          * actual we can have greater size of caches with 128B Level 1 cache
2256          * lines. In such a case, single fetch would suffice to cache in the
2257          * relevant part of the header.
2258          */
2259         prefetch(va);
2260 #if L1_CACHE_BYTES < 128
2261         prefetch(va + L1_CACHE_BYTES);
2262 #endif
2263
2264         skb = *out_skb = napi_alloc_skb(&ring->tqp_vector->napi,
2265                                         HNS3_RX_HEAD_SIZE);
2266         if (unlikely(!skb)) {
2267                 netdev_err(netdev, "alloc rx skb fail\n");
2268
2269                 u64_stats_update_begin(&ring->syncp);
2270                 ring->stats.sw_err_cnt++;
2271                 u64_stats_update_end(&ring->syncp);
2272
2273                 return -ENOMEM;
2274         }
2275
2276         prefetchw(skb->data);
2277
2278         bnum = 1;
2279         if (length <= HNS3_RX_HEAD_SIZE) {
2280                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2281
2282                 /* We can reuse buffer as-is, just make sure it is local */
2283                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
2284                         desc_cb->reuse_flag = 1;
2285                 else /* This page cannot be reused so discard it */
2286                         put_page(desc_cb->priv);
2287
2288                 ring_ptr_move_fw(ring, next_to_clean);
2289         } else {
2290                 u64_stats_update_begin(&ring->syncp);
2291                 ring->stats.seg_pkt_cnt++;
2292                 u64_stats_update_end(&ring->syncp);
2293
2294                 pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
2295
2296                 memcpy(__skb_put(skb, pull_len), va,
2297                        ALIGN(pull_len, sizeof(long)));
2298
2299                 hns3_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
2300                 ring_ptr_move_fw(ring, next_to_clean);
2301
2302                 while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
2303                         desc = &ring->desc[ring->next_to_clean];
2304                         desc_cb = &ring->desc_cb[ring->next_to_clean];
2305                         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2306                         hns3_nic_reuse_page(skb, bnum, ring, 0, desc_cb);
2307                         ring_ptr_move_fw(ring, next_to_clean);
2308                         bnum++;
2309                 }
2310         }
2311
2312         *out_bnum = bnum;
2313
2314         l234info = le32_to_cpu(desc->rx.l234_info);
2315
2316         /* Based on hw strategy, the tag offloaded will be stored at
2317          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
2318          * in one layer tag case.
2319          */
2320         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
2321                 u16 vlan_tag;
2322
2323                 vlan_tag = hns3_parse_vlan_tag(ring, desc, l234info);
2324                 if (vlan_tag & VLAN_VID_MASK)
2325                         __vlan_hwaccel_put_tag(skb,
2326                                                htons(ETH_P_8021Q),
2327                                                vlan_tag);
2328         }
2329
2330         if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))) {
2331                 u64_stats_update_begin(&ring->syncp);
2332                 ring->stats.non_vld_descs++;
2333                 u64_stats_update_end(&ring->syncp);
2334
2335                 dev_kfree_skb_any(skb);
2336                 return -EINVAL;
2337         }
2338
2339         if (unlikely((!desc->rx.pkt_len) ||
2340                      hnae3_get_bit(l234info, HNS3_RXD_TRUNCAT_B))) {
2341                 u64_stats_update_begin(&ring->syncp);
2342                 ring->stats.err_pkt_len++;
2343                 u64_stats_update_end(&ring->syncp);
2344
2345                 dev_kfree_skb_any(skb);
2346                 return -EFAULT;
2347         }
2348
2349         if (unlikely(hnae3_get_bit(l234info, HNS3_RXD_L2E_B))) {
2350                 u64_stats_update_begin(&ring->syncp);
2351                 ring->stats.l2_err++;
2352                 u64_stats_update_end(&ring->syncp);
2353
2354                 dev_kfree_skb_any(skb);
2355                 return -EFAULT;
2356         }
2357
2358         u64_stats_update_begin(&ring->syncp);
2359         ring->stats.rx_pkts++;
2360         ring->stats.rx_bytes += skb->len;
2361         u64_stats_update_end(&ring->syncp);
2362
2363         ring->tqp_vector->rx_group.total_bytes += skb->len;
2364
2365         hns3_rx_checksum(ring, skb, desc);
2366         return 0;
2367 }
2368
2369 int hns3_clean_rx_ring(
2370                 struct hns3_enet_ring *ring, int budget,
2371                 void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
2372 {
2373 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
2374         struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
2375         int recv_pkts, recv_bds, clean_count, err;
2376         int unused_count = hns3_desc_unused(ring);
2377         struct sk_buff *skb = NULL;
2378         int num, bnum = 0;
2379
2380         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
2381         rmb(); /* Make sure num taken effect before the other data is touched */
2382
2383         recv_pkts = 0, recv_bds = 0, clean_count = 0;
2384         num -= unused_count;
2385
2386         while (recv_pkts < budget && recv_bds < num) {
2387                 /* Reuse or realloc buffers */
2388                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
2389                         hns3_nic_alloc_rx_buffers(ring,
2390                                                   clean_count + unused_count);
2391                         clean_count = 0;
2392                         unused_count = hns3_desc_unused(ring);
2393                 }
2394
2395                 /* Poll one pkt */
2396                 err = hns3_handle_rx_bd(ring, &skb, &bnum);
2397                 if (unlikely(!skb)) /* This fault cannot be repaired */
2398                         goto out;
2399
2400                 recv_bds += bnum;
2401                 clean_count += bnum;
2402                 if (unlikely(err)) {  /* Do jump the err */
2403                         recv_pkts++;
2404                         continue;
2405                 }
2406
2407                 /* Do update ip stack process */
2408                 skb->protocol = eth_type_trans(skb, netdev);
2409                 rx_fn(ring, skb);
2410
2411                 recv_pkts++;
2412         }
2413
2414 out:
2415         /* Make all data has been write before submit */
2416         if (clean_count + unused_count > 0)
2417                 hns3_nic_alloc_rx_buffers(ring,
2418                                           clean_count + unused_count);
2419
2420         return recv_pkts;
2421 }
2422
2423 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
2424 {
2425         struct hns3_enet_tqp_vector *tqp_vector =
2426                                         ring_group->ring->tqp_vector;
2427         enum hns3_flow_level_range new_flow_level;
2428         int packets_per_msecs;
2429         int bytes_per_msecs;
2430         u32 time_passed_ms;
2431         u16 new_int_gl;
2432
2433         if (!ring_group->coal.int_gl || !tqp_vector->last_jiffies)
2434                 return false;
2435
2436         if (ring_group->total_packets == 0) {
2437                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
2438                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
2439                 return true;
2440         }
2441
2442         /* Simple throttlerate management
2443          * 0-10MB/s   lower     (50000 ints/s)
2444          * 10-20MB/s   middle    (20000 ints/s)
2445          * 20-1249MB/s high      (18000 ints/s)
2446          * > 40000pps  ultra     (8000 ints/s)
2447          */
2448         new_flow_level = ring_group->coal.flow_level;
2449         new_int_gl = ring_group->coal.int_gl;
2450         time_passed_ms =
2451                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
2452
2453         if (!time_passed_ms)
2454                 return false;
2455
2456         do_div(ring_group->total_packets, time_passed_ms);
2457         packets_per_msecs = ring_group->total_packets;
2458
2459         do_div(ring_group->total_bytes, time_passed_ms);
2460         bytes_per_msecs = ring_group->total_bytes;
2461
2462 #define HNS3_RX_LOW_BYTE_RATE 10000
2463 #define HNS3_RX_MID_BYTE_RATE 20000
2464
2465         switch (new_flow_level) {
2466         case HNS3_FLOW_LOW:
2467                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
2468                         new_flow_level = HNS3_FLOW_MID;
2469                 break;
2470         case HNS3_FLOW_MID:
2471                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
2472                         new_flow_level = HNS3_FLOW_HIGH;
2473                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
2474                         new_flow_level = HNS3_FLOW_LOW;
2475                 break;
2476         case HNS3_FLOW_HIGH:
2477         case HNS3_FLOW_ULTRA:
2478         default:
2479                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
2480                         new_flow_level = HNS3_FLOW_MID;
2481                 break;
2482         }
2483
2484 #define HNS3_RX_ULTRA_PACKET_RATE 40
2485
2486         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
2487             &tqp_vector->rx_group == ring_group)
2488                 new_flow_level = HNS3_FLOW_ULTRA;
2489
2490         switch (new_flow_level) {
2491         case HNS3_FLOW_LOW:
2492                 new_int_gl = HNS3_INT_GL_50K;
2493                 break;
2494         case HNS3_FLOW_MID:
2495                 new_int_gl = HNS3_INT_GL_20K;
2496                 break;
2497         case HNS3_FLOW_HIGH:
2498                 new_int_gl = HNS3_INT_GL_18K;
2499                 break;
2500         case HNS3_FLOW_ULTRA:
2501                 new_int_gl = HNS3_INT_GL_8K;
2502                 break;
2503         default:
2504                 break;
2505         }
2506
2507         ring_group->total_bytes = 0;
2508         ring_group->total_packets = 0;
2509         ring_group->coal.flow_level = new_flow_level;
2510         if (new_int_gl != ring_group->coal.int_gl) {
2511                 ring_group->coal.int_gl = new_int_gl;
2512                 return true;
2513         }
2514         return false;
2515 }
2516
2517 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
2518 {
2519         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
2520         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
2521         bool rx_update, tx_update;
2522
2523         if (tqp_vector->int_adapt_down > 0) {
2524                 tqp_vector->int_adapt_down--;
2525                 return;
2526         }
2527
2528         if (rx_group->coal.gl_adapt_enable) {
2529                 rx_update = hns3_get_new_int_gl(rx_group);
2530                 if (rx_update)
2531                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
2532                                                        rx_group->coal.int_gl);
2533         }
2534
2535         if (tx_group->coal.gl_adapt_enable) {
2536                 tx_update = hns3_get_new_int_gl(&tqp_vector->tx_group);
2537                 if (tx_update)
2538                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
2539                                                        tx_group->coal.int_gl);
2540         }
2541
2542         tqp_vector->last_jiffies = jiffies;
2543         tqp_vector->int_adapt_down = HNS3_INT_ADAPT_DOWN_START;
2544 }
2545
2546 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
2547 {
2548         struct hns3_enet_ring *ring;
2549         int rx_pkt_total = 0;
2550
2551         struct hns3_enet_tqp_vector *tqp_vector =
2552                 container_of(napi, struct hns3_enet_tqp_vector, napi);
2553         bool clean_complete = true;
2554         int rx_budget;
2555
2556         /* Since the actual Tx work is minimal, we can give the Tx a larger
2557          * budget and be more aggressive about cleaning up the Tx descriptors.
2558          */
2559         hns3_for_each_ring(ring, tqp_vector->tx_group)
2560                 hns3_clean_tx_ring(ring);
2561
2562         /* make sure rx ring budget not smaller than 1 */
2563         rx_budget = max(budget / tqp_vector->num_tqps, 1);
2564
2565         hns3_for_each_ring(ring, tqp_vector->rx_group) {
2566                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
2567                                                     hns3_rx_skb);
2568
2569                 if (rx_cleaned >= rx_budget)
2570                         clean_complete = false;
2571
2572                 rx_pkt_total += rx_cleaned;
2573         }
2574
2575         tqp_vector->rx_group.total_packets += rx_pkt_total;
2576
2577         if (!clean_complete)
2578                 return budget;
2579
2580         napi_complete(napi);
2581         hns3_update_new_int_gl(tqp_vector);
2582         hns3_mask_vector_irq(tqp_vector, 1);
2583
2584         return rx_pkt_total;
2585 }
2586
2587 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2588                                       struct hnae3_ring_chain_node *head)
2589 {
2590         struct pci_dev *pdev = tqp_vector->handle->pdev;
2591         struct hnae3_ring_chain_node *cur_chain = head;
2592         struct hnae3_ring_chain_node *chain;
2593         struct hns3_enet_ring *tx_ring;
2594         struct hns3_enet_ring *rx_ring;
2595
2596         tx_ring = tqp_vector->tx_group.ring;
2597         if (tx_ring) {
2598                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
2599                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2600                               HNAE3_RING_TYPE_TX);
2601                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2602                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
2603
2604                 cur_chain->next = NULL;
2605
2606                 while (tx_ring->next) {
2607                         tx_ring = tx_ring->next;
2608
2609                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
2610                                              GFP_KERNEL);
2611                         if (!chain)
2612                                 return -ENOMEM;
2613
2614                         cur_chain->next = chain;
2615                         chain->tqp_index = tx_ring->tqp->tqp_index;
2616                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2617                                       HNAE3_RING_TYPE_TX);
2618                         hnae3_set_field(chain->int_gl_idx,
2619                                         HNAE3_RING_GL_IDX_M,
2620                                         HNAE3_RING_GL_IDX_S,
2621                                         HNAE3_RING_GL_TX);
2622
2623                         cur_chain = chain;
2624                 }
2625         }
2626
2627         rx_ring = tqp_vector->rx_group.ring;
2628         if (!tx_ring && rx_ring) {
2629                 cur_chain->next = NULL;
2630                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
2631                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
2632                               HNAE3_RING_TYPE_RX);
2633                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2634                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2635
2636                 rx_ring = rx_ring->next;
2637         }
2638
2639         while (rx_ring) {
2640                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
2641                 if (!chain)
2642                         return -ENOMEM;
2643
2644                 cur_chain->next = chain;
2645                 chain->tqp_index = rx_ring->tqp->tqp_index;
2646                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
2647                               HNAE3_RING_TYPE_RX);
2648                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
2649                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
2650
2651                 cur_chain = chain;
2652
2653                 rx_ring = rx_ring->next;
2654         }
2655
2656         return 0;
2657 }
2658
2659 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
2660                                         struct hnae3_ring_chain_node *head)
2661 {
2662         struct pci_dev *pdev = tqp_vector->handle->pdev;
2663         struct hnae3_ring_chain_node *chain_tmp, *chain;
2664
2665         chain = head->next;
2666
2667         while (chain) {
2668                 chain_tmp = chain->next;
2669                 devm_kfree(&pdev->dev, chain);
2670                 chain = chain_tmp;
2671         }
2672 }
2673
2674 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
2675                                    struct hns3_enet_ring *ring)
2676 {
2677         ring->next = group->ring;
2678         group->ring = ring;
2679
2680         group->count++;
2681 }
2682
2683 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
2684 {
2685         struct pci_dev *pdev = priv->ae_handle->pdev;
2686         struct hns3_enet_tqp_vector *tqp_vector;
2687         int num_vectors = priv->vector_num;
2688         int numa_node;
2689         int vector_i;
2690
2691         numa_node = dev_to_node(&pdev->dev);
2692
2693         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
2694                 tqp_vector = &priv->tqp_vector[vector_i];
2695                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
2696                                 &tqp_vector->affinity_mask);
2697         }
2698 }
2699
2700 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
2701 {
2702         struct hnae3_ring_chain_node vector_ring_chain;
2703         struct hnae3_handle *h = priv->ae_handle;
2704         struct hns3_enet_tqp_vector *tqp_vector;
2705         int ret = 0;
2706         u16 i;
2707
2708         hns3_nic_set_cpumask(priv);
2709
2710         for (i = 0; i < priv->vector_num; i++) {
2711                 tqp_vector = &priv->tqp_vector[i];
2712                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
2713                 tqp_vector->num_tqps = 0;
2714         }
2715
2716         for (i = 0; i < h->kinfo.num_tqps; i++) {
2717                 u16 vector_i = i % priv->vector_num;
2718                 u16 tqp_num = h->kinfo.num_tqps;
2719
2720                 tqp_vector = &priv->tqp_vector[vector_i];
2721
2722                 hns3_add_ring_to_group(&tqp_vector->tx_group,
2723                                        priv->ring_data[i].ring);
2724
2725                 hns3_add_ring_to_group(&tqp_vector->rx_group,
2726                                        priv->ring_data[i + tqp_num].ring);
2727
2728                 priv->ring_data[i].ring->tqp_vector = tqp_vector;
2729                 priv->ring_data[i + tqp_num].ring->tqp_vector = tqp_vector;
2730                 tqp_vector->num_tqps++;
2731         }
2732
2733         for (i = 0; i < priv->vector_num; i++) {
2734                 tqp_vector = &priv->tqp_vector[i];
2735
2736                 tqp_vector->rx_group.total_bytes = 0;
2737                 tqp_vector->rx_group.total_packets = 0;
2738                 tqp_vector->tx_group.total_bytes = 0;
2739                 tqp_vector->tx_group.total_packets = 0;
2740                 tqp_vector->handle = h;
2741
2742                 ret = hns3_get_vector_ring_chain(tqp_vector,
2743                                                  &vector_ring_chain);
2744                 if (ret)
2745                         return ret;
2746
2747                 ret = h->ae_algo->ops->map_ring_to_vector(h,
2748                         tqp_vector->vector_irq, &vector_ring_chain);
2749
2750                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
2751
2752                 if (ret)
2753                         return ret;
2754
2755                 netif_napi_add(priv->netdev, &tqp_vector->napi,
2756                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
2757         }
2758
2759         return 0;
2760 }
2761
2762 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
2763 {
2764         struct hnae3_handle *h = priv->ae_handle;
2765         struct hns3_enet_tqp_vector *tqp_vector;
2766         struct hnae3_vector_info *vector;
2767         struct pci_dev *pdev = h->pdev;
2768         u16 tqp_num = h->kinfo.num_tqps;
2769         u16 vector_num;
2770         int ret = 0;
2771         u16 i;
2772
2773         /* RSS size, cpu online and vector_num should be the same */
2774         /* Should consider 2p/4p later */
2775         vector_num = min_t(u16, num_online_cpus(), tqp_num);
2776         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
2777                               GFP_KERNEL);
2778         if (!vector)
2779                 return -ENOMEM;
2780
2781         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
2782
2783         priv->vector_num = vector_num;
2784         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
2785                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
2786                              GFP_KERNEL);
2787         if (!priv->tqp_vector) {
2788                 ret = -ENOMEM;
2789                 goto out;
2790         }
2791
2792         for (i = 0; i < priv->vector_num; i++) {
2793                 tqp_vector = &priv->tqp_vector[i];
2794                 tqp_vector->idx = i;
2795                 tqp_vector->mask_addr = vector[i].io_addr;
2796                 tqp_vector->vector_irq = vector[i].vector;
2797                 hns3_vector_gl_rl_init(tqp_vector, priv);
2798         }
2799
2800 out:
2801         devm_kfree(&pdev->dev, vector);
2802         return ret;
2803 }
2804
2805 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
2806 {
2807         group->ring = NULL;
2808         group->count = 0;
2809 }
2810
2811 static int hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
2812 {
2813         struct hnae3_ring_chain_node vector_ring_chain;
2814         struct hnae3_handle *h = priv->ae_handle;
2815         struct hns3_enet_tqp_vector *tqp_vector;
2816         int i, ret;
2817
2818         for (i = 0; i < priv->vector_num; i++) {
2819                 tqp_vector = &priv->tqp_vector[i];
2820
2821                 ret = hns3_get_vector_ring_chain(tqp_vector,
2822                                                  &vector_ring_chain);
2823                 if (ret)
2824                         return ret;
2825
2826                 ret = h->ae_algo->ops->unmap_ring_from_vector(h,
2827                         tqp_vector->vector_irq, &vector_ring_chain);
2828                 if (ret)
2829                         return ret;
2830
2831                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
2832
2833                 if (priv->tqp_vector[i].irq_init_flag == HNS3_VECTOR_INITED) {
2834                         (void)irq_set_affinity_hint(
2835                                 priv->tqp_vector[i].vector_irq,
2836                                                     NULL);
2837                         free_irq(priv->tqp_vector[i].vector_irq,
2838                                  &priv->tqp_vector[i]);
2839                 }
2840
2841                 priv->ring_data[i].ring->irq_init_flag = HNS3_VECTOR_NOT_INITED;
2842                 hns3_clear_ring_group(&tqp_vector->rx_group);
2843                 hns3_clear_ring_group(&tqp_vector->tx_group);
2844                 netif_napi_del(&priv->tqp_vector[i].napi);
2845         }
2846
2847         return 0;
2848 }
2849
2850 static int hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
2851 {
2852         struct hnae3_handle *h = priv->ae_handle;
2853         struct pci_dev *pdev = h->pdev;
2854         int i, ret;
2855
2856         for (i = 0; i < priv->vector_num; i++) {
2857                 struct hns3_enet_tqp_vector *tqp_vector;
2858
2859                 tqp_vector = &priv->tqp_vector[i];
2860                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
2861                 if (ret)
2862                         return ret;
2863         }
2864
2865         devm_kfree(&pdev->dev, priv->tqp_vector);
2866         return 0;
2867 }
2868
2869 static int hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
2870                              int ring_type)
2871 {
2872         struct hns3_nic_ring_data *ring_data = priv->ring_data;
2873         int queue_num = priv->ae_handle->kinfo.num_tqps;
2874         struct pci_dev *pdev = priv->ae_handle->pdev;
2875         struct hns3_enet_ring *ring;
2876
2877         ring = devm_kzalloc(&pdev->dev, sizeof(*ring), GFP_KERNEL);
2878         if (!ring)
2879                 return -ENOMEM;
2880
2881         if (ring_type == HNAE3_RING_TYPE_TX) {
2882                 ring_data[q->tqp_index].ring = ring;
2883                 ring_data[q->tqp_index].queue_index = q->tqp_index;
2884                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
2885         } else {
2886                 ring_data[q->tqp_index + queue_num].ring = ring;
2887                 ring_data[q->tqp_index + queue_num].queue_index = q->tqp_index;
2888                 ring->io_base = q->io_base;
2889         }
2890
2891         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
2892
2893         ring->tqp = q;
2894         ring->desc = NULL;
2895         ring->desc_cb = NULL;
2896         ring->dev = priv->dev;
2897         ring->desc_dma_addr = 0;
2898         ring->buf_size = q->buf_size;
2899         ring->desc_num = q->desc_num;
2900         ring->next_to_use = 0;
2901         ring->next_to_clean = 0;
2902
2903         return 0;
2904 }
2905
2906 static int hns3_queue_to_ring(struct hnae3_queue *tqp,
2907                               struct hns3_nic_priv *priv)
2908 {
2909         int ret;
2910
2911         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
2912         if (ret)
2913                 return ret;
2914
2915         ret = hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
2916         if (ret)
2917                 return ret;
2918
2919         return 0;
2920 }
2921
2922 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
2923 {
2924         struct hnae3_handle *h = priv->ae_handle;
2925         struct pci_dev *pdev = h->pdev;
2926         int i, ret;
2927
2928         priv->ring_data =  devm_kzalloc(&pdev->dev,
2929                                         array3_size(h->kinfo.num_tqps,
2930                                                     sizeof(*priv->ring_data),
2931                                                     2),
2932                                         GFP_KERNEL);
2933         if (!priv->ring_data)
2934                 return -ENOMEM;
2935
2936         for (i = 0; i < h->kinfo.num_tqps; i++) {
2937                 ret = hns3_queue_to_ring(h->kinfo.tqp[i], priv);
2938                 if (ret)
2939                         goto err;
2940         }
2941
2942         return 0;
2943 err:
2944         devm_kfree(&pdev->dev, priv->ring_data);
2945         return ret;
2946 }
2947
2948 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
2949 {
2950         struct hnae3_handle *h = priv->ae_handle;
2951         int i;
2952
2953         for (i = 0; i < h->kinfo.num_tqps; i++) {
2954                 devm_kfree(priv->dev, priv->ring_data[i].ring);
2955                 devm_kfree(priv->dev,
2956                            priv->ring_data[i + h->kinfo.num_tqps].ring);
2957         }
2958         devm_kfree(priv->dev, priv->ring_data);
2959 }
2960
2961 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
2962 {
2963         int ret;
2964
2965         if (ring->desc_num <= 0 || ring->buf_size <= 0)
2966                 return -EINVAL;
2967
2968         ring->desc_cb = kcalloc(ring->desc_num, sizeof(ring->desc_cb[0]),
2969                                 GFP_KERNEL);
2970         if (!ring->desc_cb) {
2971                 ret = -ENOMEM;
2972                 goto out;
2973         }
2974
2975         ret = hns3_alloc_desc(ring);
2976         if (ret)
2977                 goto out_with_desc_cb;
2978
2979         if (!HNAE3_IS_TX_RING(ring)) {
2980                 ret = hns3_alloc_ring_buffers(ring);
2981                 if (ret)
2982                         goto out_with_desc;
2983         }
2984
2985         return 0;
2986
2987 out_with_desc:
2988         hns3_free_desc(ring);
2989 out_with_desc_cb:
2990         kfree(ring->desc_cb);
2991         ring->desc_cb = NULL;
2992 out:
2993         return ret;
2994 }
2995
2996 static void hns3_fini_ring(struct hns3_enet_ring *ring)
2997 {
2998         hns3_free_desc(ring);
2999         kfree(ring->desc_cb);
3000         ring->desc_cb = NULL;
3001         ring->next_to_clean = 0;
3002         ring->next_to_use = 0;
3003 }
3004
3005 static int hns3_buf_size2type(u32 buf_size)
3006 {
3007         int bd_size_type;
3008
3009         switch (buf_size) {
3010         case 512:
3011                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3012                 break;
3013         case 1024:
3014                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3015                 break;
3016         case 2048:
3017                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3018                 break;
3019         case 4096:
3020                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3021                 break;
3022         default:
3023                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3024         }
3025
3026         return bd_size_type;
3027 }
3028
3029 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3030 {
3031         dma_addr_t dma = ring->desc_dma_addr;
3032         struct hnae3_queue *q = ring->tqp;
3033
3034         if (!HNAE3_IS_TX_RING(ring)) {
3035                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG,
3036                                (u32)dma);
3037                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3038                                (u32)((dma >> 31) >> 1));
3039
3040                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3041                                hns3_buf_size2type(ring->buf_size));
3042                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3043                                ring->desc_num / 8 - 1);
3044
3045         } else {
3046                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3047                                (u32)dma);
3048                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3049                                (u32)((dma >> 31) >> 1));
3050
3051                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3052                                ring->desc_num / 8 - 1);
3053         }
3054 }
3055
3056 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3057 {
3058         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3059         int i;
3060
3061         for (i = 0; i < HNAE3_MAX_TC; i++) {
3062                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3063                 int j;
3064
3065                 if (!tc_info->enable)
3066                         continue;
3067
3068                 for (j = 0; j < tc_info->tqp_count; j++) {
3069                         struct hnae3_queue *q;
3070
3071                         q = priv->ring_data[tc_info->tqp_offset + j].ring->tqp;
3072                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3073                                        tc_info->tc);
3074                 }
3075         }
3076 }
3077
3078 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3079 {
3080         struct hnae3_handle *h = priv->ae_handle;
3081         int ring_num = h->kinfo.num_tqps * 2;
3082         int i, j;
3083         int ret;
3084
3085         for (i = 0; i < ring_num; i++) {
3086                 ret = hns3_alloc_ring_memory(priv->ring_data[i].ring);
3087                 if (ret) {
3088                         dev_err(priv->dev,
3089                                 "Alloc ring memory fail! ret=%d\n", ret);
3090                         goto out_when_alloc_ring_memory;
3091                 }
3092
3093                 u64_stats_init(&priv->ring_data[i].ring->syncp);
3094         }
3095
3096         return 0;
3097
3098 out_when_alloc_ring_memory:
3099         for (j = i - 1; j >= 0; j--)
3100                 hns3_fini_ring(priv->ring_data[j].ring);
3101
3102         return -ENOMEM;
3103 }
3104
3105 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3106 {
3107         struct hnae3_handle *h = priv->ae_handle;
3108         int i;
3109
3110         for (i = 0; i < h->kinfo.num_tqps; i++) {
3111                 if (h->ae_algo->ops->reset_queue)
3112                         h->ae_algo->ops->reset_queue(h, i);
3113
3114                 hns3_fini_ring(priv->ring_data[i].ring);
3115                 hns3_fini_ring(priv->ring_data[i + h->kinfo.num_tqps].ring);
3116         }
3117         return 0;
3118 }
3119
3120 /* Set mac addr if it is configured. or leave it to the AE driver */
3121 static void hns3_init_mac_addr(struct net_device *netdev, bool init)
3122 {
3123         struct hns3_nic_priv *priv = netdev_priv(netdev);
3124         struct hnae3_handle *h = priv->ae_handle;
3125         u8 mac_addr_temp[ETH_ALEN];
3126
3127         if (h->ae_algo->ops->get_mac_addr && init) {
3128                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3129                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3130         }
3131
3132         /* Check if the MAC address is valid, if not get a random one */
3133         if (!is_valid_ether_addr(netdev->dev_addr)) {
3134                 eth_hw_addr_random(netdev);
3135                 dev_warn(priv->dev, "using random MAC address %pM\n",
3136                          netdev->dev_addr);
3137         }
3138
3139         if (h->ae_algo->ops->set_mac_addr)
3140                 h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3141
3142 }
3143
3144 static void hns3_uninit_mac_addr(struct net_device *netdev)
3145 {
3146         struct hns3_nic_priv *priv = netdev_priv(netdev);
3147         struct hnae3_handle *h = priv->ae_handle;
3148
3149         if (h->ae_algo->ops->rm_uc_addr)
3150                 h->ae_algo->ops->rm_uc_addr(h, netdev->dev_addr);
3151 }
3152
3153 static void hns3_nic_set_priv_ops(struct net_device *netdev)
3154 {
3155         struct hns3_nic_priv *priv = netdev_priv(netdev);
3156
3157         if ((netdev->features & NETIF_F_TSO) ||
3158             (netdev->features & NETIF_F_TSO6)) {
3159                 priv->ops.fill_desc = hns3_fill_desc_tso;
3160                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tso;
3161         } else {
3162                 priv->ops.fill_desc = hns3_fill_desc;
3163                 priv->ops.maybe_stop_tx = hns3_nic_maybe_stop_tx;
3164         }
3165 }
3166
3167 static int hns3_client_init(struct hnae3_handle *handle)
3168 {
3169         struct pci_dev *pdev = handle->pdev;
3170         u16 alloc_tqps, max_rss_size;
3171         struct hns3_nic_priv *priv;
3172         struct net_device *netdev;
3173         int ret;
3174
3175         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3176                                                     &max_rss_size);
3177         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3178         if (!netdev)
3179                 return -ENOMEM;
3180
3181         priv = netdev_priv(netdev);
3182         priv->dev = &pdev->dev;
3183         priv->netdev = netdev;
3184         priv->ae_handle = handle;
3185         priv->ae_handle->last_reset_time = jiffies;
3186         priv->tx_timeout_count = 0;
3187
3188         handle->kinfo.netdev = netdev;
3189         handle->priv = (void *)priv;
3190
3191         hns3_init_mac_addr(netdev, true);
3192
3193         hns3_set_default_feature(netdev);
3194
3195         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
3196         netdev->priv_flags |= IFF_UNICAST_FLT;
3197         netdev->netdev_ops = &hns3_nic_netdev_ops;
3198         SET_NETDEV_DEV(netdev, &pdev->dev);
3199         hns3_ethtool_set_ops(netdev);
3200         hns3_nic_set_priv_ops(netdev);
3201
3202         /* Carrier off reporting is important to ethtool even BEFORE open */
3203         netif_carrier_off(netdev);
3204
3205         if (handle->flags & HNAE3_SUPPORT_VF)
3206                 handle->reset_level = HNAE3_VF_RESET;
3207         else
3208                 handle->reset_level = HNAE3_FUNC_RESET;
3209
3210         ret = hns3_get_ring_config(priv);
3211         if (ret) {
3212                 ret = -ENOMEM;
3213                 goto out_get_ring_cfg;
3214         }
3215
3216         ret = hns3_nic_alloc_vector_data(priv);
3217         if (ret) {
3218                 ret = -ENOMEM;
3219                 goto out_alloc_vector_data;
3220         }
3221
3222         ret = hns3_nic_init_vector_data(priv);
3223         if (ret) {
3224                 ret = -ENOMEM;
3225                 goto out_init_vector_data;
3226         }
3227
3228         ret = hns3_init_all_ring(priv);
3229         if (ret) {
3230                 ret = -ENOMEM;
3231                 goto out_init_ring_data;
3232         }
3233
3234         ret = register_netdev(netdev);
3235         if (ret) {
3236                 dev_err(priv->dev, "probe register netdev fail!\n");
3237                 goto out_reg_netdev_fail;
3238         }
3239
3240         hns3_dcbnl_setup(handle);
3241
3242         /* MTU range: (ETH_MIN_MTU(kernel default) - 9706) */
3243         netdev->max_mtu = HNS3_MAX_MTU - (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
3244
3245         return ret;
3246
3247 out_reg_netdev_fail:
3248 out_init_ring_data:
3249         (void)hns3_nic_uninit_vector_data(priv);
3250 out_init_vector_data:
3251         hns3_nic_dealloc_vector_data(priv);
3252 out_alloc_vector_data:
3253         priv->ring_data = NULL;
3254 out_get_ring_cfg:
3255         priv->ae_handle = NULL;
3256         free_netdev(netdev);
3257         return ret;
3258 }
3259
3260 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
3261 {
3262         struct net_device *netdev = handle->kinfo.netdev;
3263         struct hns3_nic_priv *priv = netdev_priv(netdev);
3264         int ret;
3265
3266         if (netdev->reg_state != NETREG_UNINITIALIZED)
3267                 unregister_netdev(netdev);
3268
3269         hns3_force_clear_all_rx_ring(handle);
3270
3271         ret = hns3_nic_uninit_vector_data(priv);
3272         if (ret)
3273                 netdev_err(netdev, "uninit vector error\n");
3274
3275         ret = hns3_nic_dealloc_vector_data(priv);
3276         if (ret)
3277                 netdev_err(netdev, "dealloc vector error\n");
3278
3279         ret = hns3_uninit_all_ring(priv);
3280         if (ret)
3281                 netdev_err(netdev, "uninit ring error\n");
3282
3283         hns3_put_ring_config(priv);
3284
3285         priv->ring_data = NULL;
3286
3287         hns3_uninit_mac_addr(netdev);
3288
3289         free_netdev(netdev);
3290 }
3291
3292 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
3293 {
3294         struct net_device *netdev = handle->kinfo.netdev;
3295
3296         if (!netdev)
3297                 return;
3298
3299         if (linkup) {
3300                 netif_carrier_on(netdev);
3301                 netif_tx_wake_all_queues(netdev);
3302                 netdev_info(netdev, "link up\n");
3303         } else {
3304                 netif_carrier_off(netdev);
3305                 netif_tx_stop_all_queues(netdev);
3306                 netdev_info(netdev, "link down\n");
3307         }
3308 }
3309
3310 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
3311 {
3312         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3313         struct net_device *ndev = kinfo->netdev;
3314         bool if_running;
3315         int ret;
3316
3317         if (tc > HNAE3_MAX_TC)
3318                 return -EINVAL;
3319
3320         if (!ndev)
3321                 return -ENODEV;
3322
3323         if_running = netif_running(ndev);
3324
3325         if (if_running) {
3326                 (void)hns3_nic_net_stop(ndev);
3327                 msleep(100);
3328         }
3329
3330         ret = (kinfo->dcb_ops && kinfo->dcb_ops->map_update) ?
3331                 kinfo->dcb_ops->map_update(handle) : -EOPNOTSUPP;
3332         if (ret)
3333                 goto err_out;
3334
3335         ret = hns3_nic_set_real_num_queue(ndev);
3336
3337 err_out:
3338         if (if_running)
3339                 (void)hns3_nic_net_open(ndev);
3340
3341         return ret;
3342 }
3343
3344 static void hns3_recover_hw_addr(struct net_device *ndev)
3345 {
3346         struct netdev_hw_addr_list *list;
3347         struct netdev_hw_addr *ha, *tmp;
3348
3349         /* go through and sync uc_addr entries to the device */
3350         list = &ndev->uc;
3351         list_for_each_entry_safe(ha, tmp, &list->list, list)
3352                 hns3_nic_uc_sync(ndev, ha->addr);
3353
3354         /* go through and sync mc_addr entries to the device */
3355         list = &ndev->mc;
3356         list_for_each_entry_safe(ha, tmp, &list->list, list)
3357                 hns3_nic_mc_sync(ndev, ha->addr);
3358 }
3359
3360 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
3361 {
3362         while (ring->next_to_clean != ring->next_to_use) {
3363                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
3364                 hns3_free_buffer_detach(ring, ring->next_to_clean);
3365                 ring_ptr_move_fw(ring, next_to_clean);
3366         }
3367 }
3368
3369 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
3370 {
3371         struct hns3_desc_cb res_cbs;
3372         int ret;
3373
3374         while (ring->next_to_use != ring->next_to_clean) {
3375                 /* When a buffer is not reused, it's memory has been
3376                  * freed in hns3_handle_rx_bd or will be freed by
3377                  * stack, so we need to replace the buffer here.
3378                  */
3379                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3380                         ret = hns3_reserve_buffer_map(ring, &res_cbs);
3381                         if (ret) {
3382                                 u64_stats_update_begin(&ring->syncp);
3383                                 ring->stats.sw_err_cnt++;
3384                                 u64_stats_update_end(&ring->syncp);
3385                                 /* if alloc new buffer fail, exit directly
3386                                  * and reclear in up flow.
3387                                  */
3388                                 netdev_warn(ring->tqp->handle->kinfo.netdev,
3389                                             "reserve buffer map failed, ret = %d\n",
3390                                             ret);
3391                                 return ret;
3392                         }
3393                         hns3_replace_buffer(ring, ring->next_to_use,
3394                                             &res_cbs);
3395                 }
3396                 ring_ptr_move_fw(ring, next_to_use);
3397         }
3398
3399         return 0;
3400 }
3401
3402 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
3403 {
3404         while (ring->next_to_use != ring->next_to_clean) {
3405                 /* When a buffer is not reused, it's memory has been
3406                  * freed in hns3_handle_rx_bd or will be freed by
3407                  * stack, so only need to unmap the buffer here.
3408                  */
3409                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
3410                         hns3_unmap_buffer(ring,
3411                                           &ring->desc_cb[ring->next_to_use]);
3412                         ring->desc_cb[ring->next_to_use].dma = 0;
3413                 }
3414
3415                 ring_ptr_move_fw(ring, next_to_use);
3416         }
3417 }
3418
3419 static void hns3_force_clear_all_rx_ring(struct hnae3_handle *h)
3420 {
3421         struct net_device *ndev = h->kinfo.netdev;
3422         struct hns3_nic_priv *priv = netdev_priv(ndev);
3423         struct hns3_enet_ring *ring;
3424         u32 i;
3425
3426         for (i = 0; i < h->kinfo.num_tqps; i++) {
3427                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3428                 hns3_force_clear_rx_ring(ring);
3429         }
3430 }
3431
3432 static void hns3_clear_all_ring(struct hnae3_handle *h)
3433 {
3434         struct net_device *ndev = h->kinfo.netdev;
3435         struct hns3_nic_priv *priv = netdev_priv(ndev);
3436         u32 i;
3437
3438         for (i = 0; i < h->kinfo.num_tqps; i++) {
3439                 struct netdev_queue *dev_queue;
3440                 struct hns3_enet_ring *ring;
3441
3442                 ring = priv->ring_data[i].ring;
3443                 hns3_clear_tx_ring(ring);
3444                 dev_queue = netdev_get_tx_queue(ndev,
3445                                                 priv->ring_data[i].queue_index);
3446                 netdev_tx_reset_queue(dev_queue);
3447
3448                 ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3449                 /* Continue to clear other rings even if clearing some
3450                  * rings failed.
3451                  */
3452                 hns3_clear_rx_ring(ring);
3453         }
3454 }
3455
3456 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
3457 {
3458         struct net_device *ndev = h->kinfo.netdev;
3459         struct hns3_nic_priv *priv = netdev_priv(ndev);
3460         struct hns3_enet_ring *rx_ring;
3461         int i, j;
3462         int ret;
3463
3464         for (i = 0; i < h->kinfo.num_tqps; i++) {
3465                 h->ae_algo->ops->reset_queue(h, i);
3466                 hns3_init_ring_hw(priv->ring_data[i].ring);
3467
3468                 /* We need to clear tx ring here because self test will
3469                  * use the ring and will not run down before up
3470                  */
3471                 hns3_clear_tx_ring(priv->ring_data[i].ring);
3472                 priv->ring_data[i].ring->next_to_clean = 0;
3473                 priv->ring_data[i].ring->next_to_use = 0;
3474
3475                 rx_ring = priv->ring_data[i + h->kinfo.num_tqps].ring;
3476                 hns3_init_ring_hw(rx_ring);
3477                 ret = hns3_clear_rx_ring(rx_ring);
3478                 if (ret)
3479                         return ret;
3480
3481                 /* We can not know the hardware head and tail when this
3482                  * function is called in reset flow, so we reuse all desc.
3483                  */
3484                 for (j = 0; j < rx_ring->desc_num; j++)
3485                         hns3_reuse_buffer(rx_ring, j);
3486
3487                 rx_ring->next_to_clean = 0;
3488                 rx_ring->next_to_use = 0;
3489         }
3490
3491         hns3_init_tx_ring_tc(priv);
3492
3493         return 0;
3494 }
3495
3496 static void hns3_store_coal(struct hns3_nic_priv *priv)
3497 {
3498         /* ethtool only support setting and querying one coal
3499          * configuation for now, so save the vector 0' coal
3500          * configuation here in order to restore it.
3501          */
3502         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
3503                sizeof(struct hns3_enet_coalesce));
3504         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
3505                sizeof(struct hns3_enet_coalesce));
3506 }
3507
3508 static void hns3_restore_coal(struct hns3_nic_priv *priv)
3509 {
3510         u16 vector_num = priv->vector_num;
3511         int i;
3512
3513         for (i = 0; i < vector_num; i++) {
3514                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
3515                        sizeof(struct hns3_enet_coalesce));
3516                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
3517                        sizeof(struct hns3_enet_coalesce));
3518         }
3519 }
3520
3521 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
3522 {
3523         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3524         struct net_device *ndev = kinfo->netdev;
3525
3526         if (!netif_running(ndev))
3527                 return 0;
3528
3529         return hns3_nic_net_stop(ndev);
3530 }
3531
3532 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
3533 {
3534         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
3535         int ret = 0;
3536
3537         if (netif_running(kinfo->netdev)) {
3538                 ret = hns3_nic_net_up(kinfo->netdev);
3539                 if (ret) {
3540                         netdev_err(kinfo->netdev,
3541                                    "hns net up fail, ret=%d!\n", ret);
3542                         return ret;
3543                 }
3544                 handle->last_reset_time = jiffies;
3545         }
3546
3547         return ret;
3548 }
3549
3550 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
3551 {
3552         struct net_device *netdev = handle->kinfo.netdev;
3553         struct hns3_nic_priv *priv = netdev_priv(netdev);
3554         int ret;
3555
3556         hns3_init_mac_addr(netdev, false);
3557         hns3_nic_set_rx_mode(netdev);
3558         hns3_recover_hw_addr(netdev);
3559
3560         /* Hardware table is only clear when pf resets */
3561         if (!(handle->flags & HNAE3_SUPPORT_VF))
3562                 hns3_restore_vlan(netdev);
3563
3564         /* Carrier off reporting is important to ethtool even BEFORE open */
3565         netif_carrier_off(netdev);
3566
3567         hns3_restore_coal(priv);
3568
3569         ret = hns3_nic_init_vector_data(priv);
3570         if (ret)
3571                 return ret;
3572
3573         ret = hns3_init_all_ring(priv);
3574         if (ret) {
3575                 hns3_nic_uninit_vector_data(priv);
3576                 priv->ring_data = NULL;
3577         }
3578
3579         return ret;
3580 }
3581
3582 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
3583 {
3584         struct net_device *netdev = handle->kinfo.netdev;
3585         struct hns3_nic_priv *priv = netdev_priv(netdev);
3586         int ret;
3587
3588         hns3_force_clear_all_rx_ring(handle);
3589
3590         ret = hns3_nic_uninit_vector_data(priv);
3591         if (ret) {
3592                 netdev_err(netdev, "uninit vector error\n");
3593                 return ret;
3594         }
3595
3596         hns3_store_coal(priv);
3597
3598         ret = hns3_uninit_all_ring(priv);
3599         if (ret)
3600                 netdev_err(netdev, "uninit ring error\n");
3601
3602         hns3_uninit_mac_addr(netdev);
3603
3604         return ret;
3605 }
3606
3607 static int hns3_reset_notify(struct hnae3_handle *handle,
3608                              enum hnae3_reset_notify_type type)
3609 {
3610         int ret = 0;
3611
3612         switch (type) {
3613         case HNAE3_UP_CLIENT:
3614                 ret = hns3_reset_notify_up_enet(handle);
3615                 break;
3616         case HNAE3_DOWN_CLIENT:
3617                 ret = hns3_reset_notify_down_enet(handle);
3618                 break;
3619         case HNAE3_INIT_CLIENT:
3620                 ret = hns3_reset_notify_init_enet(handle);
3621                 break;
3622         case HNAE3_UNINIT_CLIENT:
3623                 ret = hns3_reset_notify_uninit_enet(handle);
3624                 break;
3625         default:
3626                 break;
3627         }
3628
3629         return ret;
3630 }
3631
3632 static int hns3_modify_tqp_num(struct net_device *netdev, u16 new_tqp_num)
3633 {
3634         struct hns3_nic_priv *priv = netdev_priv(netdev);
3635         struct hnae3_handle *h = hns3_get_handle(netdev);
3636         int ret;
3637
3638         ret = h->ae_algo->ops->set_channels(h, new_tqp_num);
3639         if (ret)
3640                 return ret;
3641
3642         ret = hns3_get_ring_config(priv);
3643         if (ret)
3644                 return ret;
3645
3646         ret = hns3_nic_alloc_vector_data(priv);
3647         if (ret)
3648                 goto err_alloc_vector;
3649
3650         hns3_restore_coal(priv);
3651
3652         ret = hns3_nic_init_vector_data(priv);
3653         if (ret)
3654                 goto err_uninit_vector;
3655
3656         ret = hns3_init_all_ring(priv);
3657         if (ret)
3658                 goto err_put_ring;
3659
3660         return 0;
3661
3662 err_put_ring:
3663         hns3_put_ring_config(priv);
3664 err_uninit_vector:
3665         hns3_nic_uninit_vector_data(priv);
3666 err_alloc_vector:
3667         hns3_nic_dealloc_vector_data(priv);
3668         return ret;
3669 }
3670
3671 static int hns3_adjust_tqps_num(u8 num_tc, u32 new_tqp_num)
3672 {
3673         return (new_tqp_num / num_tc) * num_tc;
3674 }
3675
3676 int hns3_set_channels(struct net_device *netdev,
3677                       struct ethtool_channels *ch)
3678 {
3679         struct hns3_nic_priv *priv = netdev_priv(netdev);
3680         struct hnae3_handle *h = hns3_get_handle(netdev);
3681         struct hnae3_knic_private_info *kinfo = &h->kinfo;
3682         bool if_running = netif_running(netdev);
3683         u32 new_tqp_num = ch->combined_count;
3684         u16 org_tqp_num;
3685         int ret;
3686
3687         if (ch->rx_count || ch->tx_count)
3688                 return -EINVAL;
3689
3690         if (new_tqp_num > hns3_get_max_available_channels(h) ||
3691             new_tqp_num < kinfo->num_tc) {
3692                 dev_err(&netdev->dev,
3693                         "Change tqps fail, the tqp range is from %d to %d",
3694                         kinfo->num_tc,
3695                         hns3_get_max_available_channels(h));
3696                 return -EINVAL;
3697         }
3698
3699         new_tqp_num = hns3_adjust_tqps_num(kinfo->num_tc, new_tqp_num);
3700         if (kinfo->num_tqps == new_tqp_num)
3701                 return 0;
3702
3703         if (if_running)
3704                 hns3_nic_net_stop(netdev);
3705
3706         ret = hns3_nic_uninit_vector_data(priv);
3707         if (ret) {
3708                 dev_err(&netdev->dev,
3709                         "Unbind vector with tqp fail, nothing is changed");
3710                 goto open_netdev;
3711         }
3712
3713         hns3_store_coal(priv);
3714
3715         hns3_nic_dealloc_vector_data(priv);
3716
3717         hns3_uninit_all_ring(priv);
3718         hns3_put_ring_config(priv);
3719
3720         org_tqp_num = h->kinfo.num_tqps;
3721         ret = hns3_modify_tqp_num(netdev, new_tqp_num);
3722         if (ret) {
3723                 ret = hns3_modify_tqp_num(netdev, org_tqp_num);
3724                 if (ret) {
3725                         /* If revert to old tqp failed, fatal error occurred */
3726                         dev_err(&netdev->dev,
3727                                 "Revert to old tqp num fail, ret=%d", ret);
3728                         return ret;
3729                 }
3730                 dev_info(&netdev->dev,
3731                          "Change tqp num fail, Revert to old tqp num");
3732         }
3733
3734 open_netdev:
3735         if (if_running)
3736                 hns3_nic_net_open(netdev);
3737
3738         return ret;
3739 }
3740
3741 static const struct hnae3_client_ops client_ops = {
3742         .init_instance = hns3_client_init,
3743         .uninit_instance = hns3_client_uninit,
3744         .link_status_change = hns3_link_status_change,
3745         .setup_tc = hns3_client_setup_tc,
3746         .reset_notify = hns3_reset_notify,
3747 };
3748
3749 /* hns3_init_module - Driver registration routine
3750  * hns3_init_module is the first routine called when the driver is
3751  * loaded. All it does is register with the PCI subsystem.
3752  */
3753 static int __init hns3_init_module(void)
3754 {
3755         int ret;
3756
3757         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
3758         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
3759
3760         client.type = HNAE3_CLIENT_KNIC;
3761         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH - 1, "%s",
3762                  hns3_driver_name);
3763
3764         client.ops = &client_ops;
3765
3766         INIT_LIST_HEAD(&client.node);
3767
3768         ret = hnae3_register_client(&client);
3769         if (ret)
3770                 return ret;
3771
3772         ret = pci_register_driver(&hns3_driver);
3773         if (ret)
3774                 hnae3_unregister_client(&client);
3775
3776         return ret;
3777 }
3778 module_init(hns3_init_module);
3779
3780 /* hns3_exit_module - Driver exit cleanup routine
3781  * hns3_exit_module is called just before the driver is removed
3782  * from memory.
3783  */
3784 static void __exit hns3_exit_module(void)
3785 {
3786         pci_unregister_driver(&hns3_driver);
3787         hnae3_unregister_client(&client);
3788 }
3789 module_exit(hns3_exit_module);
3790
3791 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
3792 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
3793 MODULE_LICENSE("GPL");
3794 MODULE_ALIAS("pci:hns-nic");
3795 MODULE_VERSION(HNS3_MOD_VERSION);