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 #ifdef CONFIG_RFS_ACCEL
   8 #include <linux/cpu_rmap.h>
   9 #endif
  10 #include <linux/if_vlan.h>
  11 #include <linux/irq.h>
  12 #include <linux/ip.h>
  13 #include <linux/ipv6.h>
  14 #include <linux/module.h>
  15 #include <linux/pci.h>
  16 #include <linux/aer.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/sctp.h>
  19 #include <net/gre.h>
  20 #include <net/ip6_checksum.h>
  21 #include <net/pkt_cls.h>
  22 #include <net/tcp.h>
  23 #include <net/vxlan.h>
  24 #include <net/geneve.h>
  25
  26 #include "hnae3.h"
  27 #include "hns3_enet.h"
  28 /* All hns3 tracepoints are defined by the include below, which
  29  * must be included exactly once across the whole kernel with
  30  * CREATE_TRACE_POINTS defined
  31  */
  32 #define CREATE_TRACE_POINTS
  33 #include "hns3_trace.h"
  34
  35 #define hns3_set_field(origin, shift, val)      ((origin) |= ((val) << (shift)))
  36 #define hns3_tx_bd_count(S)     DIV_ROUND_UP(S, HNS3_MAX_BD_SIZE)
  37
  38 #define hns3_rl_err(fmt, ...)                                           \
  39         do {                                                            \
  40                 if (net_ratelimit())                                    \
  41                         netdev_err(fmt, ##__VA_ARGS__);                 \
  42         } while (0)
  43
  44 static void hns3_clear_all_ring(struct hnae3_handle *h, bool force);
  45
  46 static const char hns3_driver_name[] = "hns3";
  47 static const char hns3_driver_string[] =
  48                         "Hisilicon Ethernet Network Driver for Hip08 Family";
  49 static const char hns3_copyright[] = "Copyright (c) 2017 Huawei Corporation.";
  50 static struct hnae3_client client;
  51
  52 static int debug = -1;
  53 module_param(debug, int, 0);
  54 MODULE_PARM_DESC(debug, " Network interface message level setting");
  55
  56 #define DEFAULT_MSG_LEVEL (NETIF_MSG_PROBE | NETIF_MSG_LINK | \
  57                            NETIF_MSG_IFDOWN | NETIF_MSG_IFUP)
  58
  59 #define HNS3_INNER_VLAN_TAG     1
  60 #define HNS3_OUTER_VLAN_TAG     2
  61
  62 #define HNS3_MIN_TX_LEN         33U
  63
  64 /* hns3_pci_tbl - PCI Device ID Table
  65  *
  66  * Last entry must be all 0s
  67  *
  68  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  69  *   Class, Class Mask, private data (not used) }
  70  */
  71 static const struct pci_device_id hns3_pci_tbl[] = {
  72         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_GE), 0},
  73         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE), 0},
  74         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA),
  75          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  76         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_25GE_RDMA_MACSEC),
  77          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  78         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA),
  79          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  80         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_50GE_RDMA_MACSEC),
  81          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  82         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_MACSEC),
  83          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  84         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_VF), 0},
  85         {PCI_VDEVICE(HUAWEI, HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF),
  86          HNAE3_DEV_SUPPORT_ROCE_DCB_BITS},
  87         /* required last entry */
  88         {0, }
  89 };
  90 MODULE_DEVICE_TABLE(pci, hns3_pci_tbl);
  91
  92 static irqreturn_t hns3_irq_handle(int irq, void *vector)
  93 {
  94         struct hns3_enet_tqp_vector *tqp_vector = vector;
  95
  96         napi_schedule_irqoff(&tqp_vector->napi);
  97
  98         return IRQ_HANDLED;
  99 }
 100
 101 static void hns3_nic_uninit_irq(struct hns3_nic_priv *priv)
 102 {
 103         struct hns3_enet_tqp_vector *tqp_vectors;
 104         unsigned int i;
 105
 106         for (i = 0; i < priv->vector_num; i++) {
 107                 tqp_vectors = &priv->tqp_vector[i];
 108
 109                 if (tqp_vectors->irq_init_flag != HNS3_VECTOR_INITED)
 110                         continue;
 111
 112                 /* clear the affinity mask */
 113                 irq_set_affinity_hint(tqp_vectors->vector_irq, NULL);
 114
 115                 /* release the irq resource */
 116                 free_irq(tqp_vectors->vector_irq, tqp_vectors);
 117                 tqp_vectors->irq_init_flag = HNS3_VECTOR_NOT_INITED;
 118         }
 119 }
 120
 121 static int hns3_nic_init_irq(struct hns3_nic_priv *priv)
 122 {
 123         struct hns3_enet_tqp_vector *tqp_vectors;
 124         int txrx_int_idx = 0;
 125         int rx_int_idx = 0;
 126         int tx_int_idx = 0;
 127         unsigned int i;
 128         int ret;
 129
 130         for (i = 0; i < priv->vector_num; i++) {
 131                 tqp_vectors = &priv->tqp_vector[i];
 132
 133                 if (tqp_vectors->irq_init_flag == HNS3_VECTOR_INITED)
 134                         continue;
 135
 136                 if (tqp_vectors->tx_group.ring && tqp_vectors->rx_group.ring) {
 137                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN,
 138                                  "%s-%s-%s-%d", hns3_driver_name,
 139                                  pci_name(priv->ae_handle->pdev),
 140                                  "TxRx", txrx_int_idx++);
 141                         txrx_int_idx++;
 142                 } else if (tqp_vectors->rx_group.ring) {
 143                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN,
 144                                  "%s-%s-%s-%d", hns3_driver_name,
 145                                  pci_name(priv->ae_handle->pdev),
 146                                  "Rx", rx_int_idx++);
 147                 } else if (tqp_vectors->tx_group.ring) {
 148                         snprintf(tqp_vectors->name, HNAE3_INT_NAME_LEN,
 149                                  "%s-%s-%s-%d", hns3_driver_name,
 150                                  pci_name(priv->ae_handle->pdev),
 151                                  "Tx", tx_int_idx++);
 152                 } else {
 153                         /* Skip this unused q_vector */
 154                         continue;
 155                 }
 156
 157                 tqp_vectors->name[HNAE3_INT_NAME_LEN - 1] = '\0';
 158
 159                 irq_set_status_flags(tqp_vectors->vector_irq, IRQ_NOAUTOEN);
 160                 ret = request_irq(tqp_vectors->vector_irq, hns3_irq_handle, 0,
 161                                   tqp_vectors->name, tqp_vectors);
 162                 if (ret) {
 163                         netdev_err(priv->netdev, "request irq(%d) fail\n",
 164                                    tqp_vectors->vector_irq);
 165                         hns3_nic_uninit_irq(priv);
 166                         return ret;
 167                 }
 168
 169                 irq_set_affinity_hint(tqp_vectors->vector_irq,
 170                                       &tqp_vectors->affinity_mask);
 171
 172                 tqp_vectors->irq_init_flag = HNS3_VECTOR_INITED;
 173         }
 174
 175         return 0;
 176 }
 177
 178 static void hns3_mask_vector_irq(struct hns3_enet_tqp_vector *tqp_vector,
 179                                  u32 mask_en)
 180 {
 181         writel(mask_en, tqp_vector->mask_addr);
 182 }
 183
 184 static void hns3_vector_enable(struct hns3_enet_tqp_vector *tqp_vector)
 185 {
 186         napi_enable(&tqp_vector->napi);
 187         enable_irq(tqp_vector->vector_irq);
 188
 189         /* enable vector */
 190         hns3_mask_vector_irq(tqp_vector, 1);
 191 }
 192
 193 static void hns3_vector_disable(struct hns3_enet_tqp_vector *tqp_vector)
 194 {
 195         /* disable vector */
 196         hns3_mask_vector_irq(tqp_vector, 0);
 197
 198         disable_irq(tqp_vector->vector_irq);
 199         napi_disable(&tqp_vector->napi);
 200 }
 201
 202 void hns3_set_vector_coalesce_rl(struct hns3_enet_tqp_vector *tqp_vector,
 203                                  u32 rl_value)
 204 {
 205         u32 rl_reg = hns3_rl_usec_to_reg(rl_value);
 206
 207         /* this defines the configuration for RL (Interrupt Rate Limiter).
 208          * Rl defines rate of interrupts i.e. number of interrupts-per-second
 209          * GL and RL(Rate Limiter) are 2 ways to acheive interrupt coalescing
 210          */
 211
 212         if (rl_reg > 0 && !tqp_vector->tx_group.coal.gl_adapt_enable &&
 213             !tqp_vector->rx_group.coal.gl_adapt_enable)
 214                 /* According to the hardware, the range of rl_reg is
 215                  * 0-59 and the unit is 4.
 216                  */
 217                 rl_reg |=  HNS3_INT_RL_ENABLE_MASK;
 218
 219         writel(rl_reg, tqp_vector->mask_addr + HNS3_VECTOR_RL_OFFSET);
 220 }
 221
 222 void hns3_set_vector_coalesce_rx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 223                                     u32 gl_value)
 224 {
 225         u32 rx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 226
 227         writel(rx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL0_OFFSET);
 228 }
 229
 230 void hns3_set_vector_coalesce_tx_gl(struct hns3_enet_tqp_vector *tqp_vector,
 231                                     u32 gl_value)
 232 {
 233         u32 tx_gl_reg = hns3_gl_usec_to_reg(gl_value);
 234
 235         writel(tx_gl_reg, tqp_vector->mask_addr + HNS3_VECTOR_GL1_OFFSET);
 236 }
 237
 238 static void hns3_vector_gl_rl_init(struct hns3_enet_tqp_vector *tqp_vector,
 239                                    struct hns3_nic_priv *priv)
 240 {
 241         /* initialize the configuration for interrupt coalescing.
 242          * 1. GL (Interrupt Gap Limiter)
 243          * 2. RL (Interrupt Rate Limiter)
 244          *
 245          * Default: enable interrupt coalescing self-adaptive and GL
 246          */
 247         tqp_vector->tx_group.coal.gl_adapt_enable = 1;
 248         tqp_vector->rx_group.coal.gl_adapt_enable = 1;
 249
 250         tqp_vector->tx_group.coal.int_gl = HNS3_INT_GL_50K;
 251         tqp_vector->rx_group.coal.int_gl = HNS3_INT_GL_50K;
 252
 253         tqp_vector->rx_group.coal.flow_level = HNS3_FLOW_LOW;
 254         tqp_vector->tx_group.coal.flow_level = HNS3_FLOW_LOW;
 255 }
 256
 257 static void hns3_vector_gl_rl_init_hw(struct hns3_enet_tqp_vector *tqp_vector,
 258                                       struct hns3_nic_priv *priv)
 259 {
 260         struct hnae3_handle *h = priv->ae_handle;
 261
 262         hns3_set_vector_coalesce_tx_gl(tqp_vector,
 263                                        tqp_vector->tx_group.coal.int_gl);
 264         hns3_set_vector_coalesce_rx_gl(tqp_vector,
 265                                        tqp_vector->rx_group.coal.int_gl);
 266         hns3_set_vector_coalesce_rl(tqp_vector, h->kinfo.int_rl_setting);
 267 }
 268
 269 static int hns3_nic_set_real_num_queue(struct net_device *netdev)
 270 {
 271         struct hnae3_handle *h = hns3_get_handle(netdev);
 272         struct hnae3_knic_private_info *kinfo = &h->kinfo;
 273         unsigned int queue_size = kinfo->rss_size * kinfo->num_tc;
 274         int i, ret;
 275
 276         if (kinfo->num_tc <= 1) {
 277                 netdev_reset_tc(netdev);
 278         } else {
 279                 ret = netdev_set_num_tc(netdev, kinfo->num_tc);
 280                 if (ret) {
 281                         netdev_err(netdev,
 282                                    "netdev_set_num_tc fail, ret=%d!\n", ret);
 283                         return ret;
 284                 }
 285
 286                 for (i = 0; i < HNAE3_MAX_TC; i++) {
 287                         if (!kinfo->tc_info[i].enable)
 288                                 continue;
 289
 290                         netdev_set_tc_queue(netdev,
 291                                             kinfo->tc_info[i].tc,
 292                                             kinfo->tc_info[i].tqp_count,
 293                                             kinfo->tc_info[i].tqp_offset);
 294                 }
 295         }
 296
 297         ret = netif_set_real_num_tx_queues(netdev, queue_size);
 298         if (ret) {
 299                 netdev_err(netdev,
 300                            "netif_set_real_num_tx_queues fail, ret=%d!\n", ret);
 301                 return ret;
 302         }
 303
 304         ret = netif_set_real_num_rx_queues(netdev, queue_size);
 305         if (ret) {
 306                 netdev_err(netdev,
 307                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
 308                 return ret;
 309         }
 310
 311         return 0;
 312 }
 313
 314 static u16 hns3_get_max_available_channels(struct hnae3_handle *h)
 315 {
 316         u16 alloc_tqps, max_rss_size, rss_size;
 317
 318         h->ae_algo->ops->get_tqps_and_rss_info(h, &alloc_tqps, &max_rss_size);
 319         rss_size = alloc_tqps / h->kinfo.num_tc;
 320
 321         return min_t(u16, rss_size, max_rss_size);
 322 }
 323
 324 static void hns3_tqp_enable(struct hnae3_queue *tqp)
 325 {
 326         u32 rcb_reg;
 327
 328         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 329         rcb_reg |= BIT(HNS3_RING_EN_B);
 330         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 331 }
 332
 333 static void hns3_tqp_disable(struct hnae3_queue *tqp)
 334 {
 335         u32 rcb_reg;
 336
 337         rcb_reg = hns3_read_dev(tqp, HNS3_RING_EN_REG);
 338         rcb_reg &= ~BIT(HNS3_RING_EN_B);
 339         hns3_write_dev(tqp, HNS3_RING_EN_REG, rcb_reg);
 340 }
 341
 342 static void hns3_free_rx_cpu_rmap(struct net_device *netdev)
 343 {
 344 #ifdef CONFIG_RFS_ACCEL
 345         free_irq_cpu_rmap(netdev->rx_cpu_rmap);
 346         netdev->rx_cpu_rmap = NULL;
 347 #endif
 348 }
 349
 350 static int hns3_set_rx_cpu_rmap(struct net_device *netdev)
 351 {
 352 #ifdef CONFIG_RFS_ACCEL
 353         struct hns3_nic_priv *priv = netdev_priv(netdev);
 354         struct hns3_enet_tqp_vector *tqp_vector;
 355         int i, ret;
 356
 357         if (!netdev->rx_cpu_rmap) {
 358                 netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(priv->vector_num);
 359                 if (!netdev->rx_cpu_rmap)
 360                         return -ENOMEM;
 361         }
 362
 363         for (i = 0; i < priv->vector_num; i++) {
 364                 tqp_vector = &priv->tqp_vector[i];
 365                 ret = irq_cpu_rmap_add(netdev->rx_cpu_rmap,
 366                                        tqp_vector->vector_irq);
 367                 if (ret) {
 368                         hns3_free_rx_cpu_rmap(netdev);
 369                         return ret;
 370                 }
 371         }
 372 #endif
 373         return 0;
 374 }
 375
 376 static int hns3_nic_net_up(struct net_device *netdev)
 377 {
 378         struct hns3_nic_priv *priv = netdev_priv(netdev);
 379         struct hnae3_handle *h = priv->ae_handle;
 380         int i, j;
 381         int ret;
 382
 383         ret = hns3_nic_reset_all_ring(h);
 384         if (ret)
 385                 return ret;
 386
 387         clear_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 388
 389         /* enable the vectors */
 390         for (i = 0; i < priv->vector_num; i++)
 391                 hns3_vector_enable(&priv->tqp_vector[i]);
 392
 393         /* enable rcb */
 394         for (j = 0; j < h->kinfo.num_tqps; j++)
 395                 hns3_tqp_enable(h->kinfo.tqp[j]);
 396
 397         /* start the ae_dev */
 398         ret = h->ae_algo->ops->start ? h->ae_algo->ops->start(h) : 0;
 399         if (ret) {
 400                 set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
 401                 while (j--)
 402                         hns3_tqp_disable(h->kinfo.tqp[j]);
 403
 404                 for (j = i - 1; j >= 0; j--)
 405                         hns3_vector_disable(&priv->tqp_vector[j]);
 406         }
 407
 408         return ret;
 409 }
 410
 411 static void hns3_config_xps(struct hns3_nic_priv *priv)
 412 {
 413         int i;
 414
 415         for (i = 0; i < priv->vector_num; i++) {
 416                 struct hns3_enet_tqp_vector *tqp_vector = &priv->tqp_vector[i];
 417                 struct hns3_enet_ring *ring = tqp_vector->tx_group.ring;
 418
 419                 while (ring) {
 420                         int ret;
 421
 422                         ret = netif_set_xps_queue(priv->netdev,
 423                                                   &tqp_vector->affinity_mask,
 424                                                   ring->tqp->tqp_index);
 425                         if (ret)
 426                                 netdev_warn(priv->netdev,
 427                                             "set xps queue failed: %d", ret);
 428
 429                         ring = ring->next;
 430                 }
 431         }
 432 }
 433
 434 static int hns3_nic_net_open(struct net_device *netdev)
 435 {
 436         struct hns3_nic_priv *priv = netdev_priv(netdev);
 437         struct hnae3_handle *h = hns3_get_handle(netdev);
 438         struct hnae3_knic_private_info *kinfo;
 439         int i, ret;
 440
 441         if (hns3_nic_resetting(netdev))
 442                 return -EBUSY;
 443
 444         netif_carrier_off(netdev);
 445
 446         ret = hns3_nic_set_real_num_queue(netdev);
 447         if (ret)
 448                 return ret;
 449
 450         ret = hns3_nic_net_up(netdev);
 451         if (ret) {
 452                 netdev_err(netdev, "net up fail, ret=%d!\n", ret);
 453                 return ret;
 454         }
 455
 456         kinfo = &h->kinfo;
 457         for (i = 0; i < HNAE3_MAX_USER_PRIO; i++)
 458                 netdev_set_prio_tc_map(netdev, i, kinfo->prio_tc[i]);
 459
 460         if (h->ae_algo->ops->set_timer_task)
 461                 h->ae_algo->ops->set_timer_task(priv->ae_handle, true);
 462
 463         hns3_config_xps(priv);
 464
 465         netif_dbg(h, drv, netdev, "net open\n");
 466
 467         return 0;
 468 }
 469
 470 static void hns3_reset_tx_queue(struct hnae3_handle *h)
 471 {
 472         struct net_device *ndev = h->kinfo.netdev;
 473         struct hns3_nic_priv *priv = netdev_priv(ndev);
 474         struct netdev_queue *dev_queue;
 475         u32 i;
 476
 477         for (i = 0; i < h->kinfo.num_tqps; i++) {
 478                 dev_queue = netdev_get_tx_queue(ndev,
 479                                                 priv->ring[i].queue_index);
 480                 netdev_tx_reset_queue(dev_queue);
 481         }
 482 }
 483
 484 static void hns3_nic_net_down(struct net_device *netdev)
 485 {
 486         struct hns3_nic_priv *priv = netdev_priv(netdev);
 487         struct hnae3_handle *h = hns3_get_handle(netdev);
 488         const struct hnae3_ae_ops *ops;
 489         int i;
 490
 491         /* disable vectors */
 492         for (i = 0; i < priv->vector_num; i++)
 493                 hns3_vector_disable(&priv->tqp_vector[i]);
 494
 495         /* disable rcb */
 496         for (i = 0; i < h->kinfo.num_tqps; i++)
 497                 hns3_tqp_disable(h->kinfo.tqp[i]);
 498
 499         /* stop ae_dev */
 500         ops = priv->ae_handle->ae_algo->ops;
 501         if (ops->stop)
 502                 ops->stop(priv->ae_handle);
 503
 504         /* delay ring buffer clearing to hns3_reset_notify_uninit_enet
 505          * during reset process, because driver may not be able
 506          * to disable the ring through firmware when downing the netdev.
 507          */
 508         if (!hns3_nic_resetting(netdev))
 509                 hns3_clear_all_ring(priv->ae_handle, false);
 510
 511         hns3_reset_tx_queue(priv->ae_handle);
 512 }
 513
 514 static int hns3_nic_net_stop(struct net_device *netdev)
 515 {
 516         struct hns3_nic_priv *priv = netdev_priv(netdev);
 517         struct hnae3_handle *h = hns3_get_handle(netdev);
 518
 519         if (test_and_set_bit(HNS3_NIC_STATE_DOWN, &priv->state))
 520                 return 0;
 521
 522         netif_dbg(h, drv, netdev, "net stop\n");
 523
 524         if (h->ae_algo->ops->set_timer_task)
 525                 h->ae_algo->ops->set_timer_task(priv->ae_handle, false);
 526
 527         netif_tx_stop_all_queues(netdev);
 528         netif_carrier_off(netdev);
 529
 530         hns3_nic_net_down(netdev);
 531
 532         return 0;
 533 }
 534
 535 static int hns3_nic_uc_sync(struct net_device *netdev,
 536                             const unsigned char *addr)
 537 {
 538         struct hnae3_handle *h = hns3_get_handle(netdev);
 539
 540         if (h->ae_algo->ops->add_uc_addr)
 541                 return h->ae_algo->ops->add_uc_addr(h, addr);
 542
 543         return 0;
 544 }
 545
 546 static int hns3_nic_uc_unsync(struct net_device *netdev,
 547                               const unsigned char *addr)
 548 {
 549         struct hnae3_handle *h = hns3_get_handle(netdev);
 550
 551         /* need ignore the request of removing device address, because
 552          * we store the device address and other addresses of uc list
 553          * in the function's mac filter list.
 554          */
 555         if (ether_addr_equal(addr, netdev->dev_addr))
 556                 return 0;
 557
 558         if (h->ae_algo->ops->rm_uc_addr)
 559                 return h->ae_algo->ops->rm_uc_addr(h, addr);
 560
 561         return 0;
 562 }
 563
 564 static int hns3_nic_mc_sync(struct net_device *netdev,
 565                             const unsigned char *addr)
 566 {
 567         struct hnae3_handle *h = hns3_get_handle(netdev);
 568
 569         if (h->ae_algo->ops->add_mc_addr)
 570                 return h->ae_algo->ops->add_mc_addr(h, addr);
 571
 572         return 0;
 573 }
 574
 575 static int hns3_nic_mc_unsync(struct net_device *netdev,
 576                               const unsigned char *addr)
 577 {
 578         struct hnae3_handle *h = hns3_get_handle(netdev);
 579
 580         if (h->ae_algo->ops->rm_mc_addr)
 581                 return h->ae_algo->ops->rm_mc_addr(h, addr);
 582
 583         return 0;
 584 }
 585
 586 static u8 hns3_get_netdev_flags(struct net_device *netdev)
 587 {
 588         u8 flags = 0;
 589
 590         if (netdev->flags & IFF_PROMISC) {
 591                 flags = HNAE3_USER_UPE | HNAE3_USER_MPE | HNAE3_BPE;
 592         } else {
 593                 flags |= HNAE3_VLAN_FLTR;
 594                 if (netdev->flags & IFF_ALLMULTI)
 595                         flags |= HNAE3_USER_MPE;
 596         }
 597
 598         return flags;
 599 }
 600
 601 static void hns3_nic_set_rx_mode(struct net_device *netdev)
 602 {
 603         struct hnae3_handle *h = hns3_get_handle(netdev);
 604         u8 new_flags;
 605
 606         new_flags = hns3_get_netdev_flags(netdev);
 607
 608         __dev_uc_sync(netdev, hns3_nic_uc_sync, hns3_nic_uc_unsync);
 609         __dev_mc_sync(netdev, hns3_nic_mc_sync, hns3_nic_mc_unsync);
 610
 611         /* User mode Promisc mode enable and vlan filtering is disabled to
 612          * let all packets in.
 613          */
 614         h->netdev_flags = new_flags;
 615         hns3_request_update_promisc_mode(h);
 616 }
 617
 618 void hns3_request_update_promisc_mode(struct hnae3_handle *handle)
 619 {
 620         const struct hnae3_ae_ops *ops = handle->ae_algo->ops;
 621
 622         if (ops->request_update_promisc_mode)
 623                 ops->request_update_promisc_mode(handle);
 624 }
 625
 626 int hns3_update_promisc_mode(struct net_device *netdev, u8 promisc_flags)
 627 {
 628         struct hns3_nic_priv *priv = netdev_priv(netdev);
 629         struct hnae3_handle *h = priv->ae_handle;
 630
 631         if (h->ae_algo->ops->set_promisc_mode) {
 632                 return h->ae_algo->ops->set_promisc_mode(h,
 633                                                 promisc_flags & HNAE3_UPE,
 634                                                 promisc_flags & HNAE3_MPE);
 635         }
 636
 637         return 0;
 638 }
 639
 640 void hns3_enable_vlan_filter(struct net_device *netdev, bool enable)
 641 {
 642         struct hns3_nic_priv *priv = netdev_priv(netdev);
 643         struct hnae3_handle *h = priv->ae_handle;
 644         bool last_state;
 645
 646         if (h->pdev->revision >= 0x21 && h->ae_algo->ops->enable_vlan_filter) {
 647                 last_state = h->netdev_flags & HNAE3_VLAN_FLTR ? true : false;
 648                 if (enable != last_state) {
 649                         netdev_info(netdev,
 650                                     "%s vlan filter\n",
 651                                     enable ? "enable" : "disable");
 652                         h->ae_algo->ops->enable_vlan_filter(h, enable);
 653                 }
 654         }
 655 }
 656
 657 static int hns3_set_tso(struct sk_buff *skb, u32 *paylen,
 658                         u16 *mss, u32 *type_cs_vlan_tso)
 659 {
 660         u32 l4_offset, hdr_len;
 661         union l3_hdr_info l3;
 662         union l4_hdr_info l4;
 663         u32 l4_paylen;
 664         int ret;
 665
 666         if (!skb_is_gso(skb))
 667                 return 0;
 668
 669         ret = skb_cow_head(skb, 0);
 670         if (unlikely(ret < 0))
 671                 return ret;
 672
 673         l3.hdr = skb_network_header(skb);
 674         l4.hdr = skb_transport_header(skb);
 675
 676         /* Software should clear the IPv4's checksum field when tso is
 677          * needed.
 678          */
 679         if (l3.v4->version == 4)
 680                 l3.v4->check = 0;
 681
 682         /* tunnel packet */
 683         if (skb_shinfo(skb)->gso_type & (SKB_GSO_GRE |
 684                                          SKB_GSO_GRE_CSUM |
 685                                          SKB_GSO_UDP_TUNNEL |
 686                                          SKB_GSO_UDP_TUNNEL_CSUM)) {
 687                 if ((!(skb_shinfo(skb)->gso_type &
 688                     SKB_GSO_PARTIAL)) &&
 689                     (skb_shinfo(skb)->gso_type &
 690                     SKB_GSO_UDP_TUNNEL_CSUM)) {
 691                         /* Software should clear the udp's checksum
 692                          * field when tso is needed.
 693                          */
 694                         l4.udp->check = 0;
 695                 }
 696                 /* reset l3&l4 pointers from outer to inner headers */
 697                 l3.hdr = skb_inner_network_header(skb);
 698                 l4.hdr = skb_inner_transport_header(skb);
 699
 700                 /* Software should clear the IPv4's checksum field when
 701                  * tso is needed.
 702                  */
 703                 if (l3.v4->version == 4)
 704                         l3.v4->check = 0;
 705         }
 706
 707         /* normal or tunnel packet */
 708         l4_offset = l4.hdr - skb->data;
 709         hdr_len = (l4.tcp->doff << 2) + l4_offset;
 710
 711         /* remove payload length from inner pseudo checksum when tso */
 712         l4_paylen = skb->len - l4_offset;
 713         csum_replace_by_diff(&l4.tcp->check,
 714                              (__force __wsum)htonl(l4_paylen));
 715
 716         /* find the txbd field values */
 717         *paylen = skb->len - hdr_len;
 718         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_TSO_B, 1);
 719
 720         /* get MSS for TSO */
 721         *mss = skb_shinfo(skb)->gso_size;
 722
 723         trace_hns3_tso(skb);
 724
 725         return 0;
 726 }
 727
 728 static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
 729                                 u8 *il4_proto)
 730 {
 731         union l3_hdr_info l3;
 732         unsigned char *l4_hdr;
 733         unsigned char *exthdr;
 734         u8 l4_proto_tmp;
 735         __be16 frag_off;
 736
 737         /* find outer header point */
 738         l3.hdr = skb_network_header(skb);
 739         l4_hdr = skb_transport_header(skb);
 740
 741         if (skb->protocol == htons(ETH_P_IPV6)) {
 742                 exthdr = l3.hdr + sizeof(*l3.v6);
 743                 l4_proto_tmp = l3.v6->nexthdr;
 744                 if (l4_hdr != exthdr)
 745                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 746                                          &l4_proto_tmp, &frag_off);
 747         } else if (skb->protocol == htons(ETH_P_IP)) {
 748                 l4_proto_tmp = l3.v4->protocol;
 749         } else {
 750                 return -EINVAL;
 751         }
 752
 753         *ol4_proto = l4_proto_tmp;
 754
 755         /* tunnel packet */
 756         if (!skb->encapsulation) {
 757                 *il4_proto = 0;
 758                 return 0;
 759         }
 760
 761         /* find inner header point */
 762         l3.hdr = skb_inner_network_header(skb);
 763         l4_hdr = skb_inner_transport_header(skb);
 764
 765         if (l3.v6->version == 6) {
 766                 exthdr = l3.hdr + sizeof(*l3.v6);
 767                 l4_proto_tmp = l3.v6->nexthdr;
 768                 if (l4_hdr != exthdr)
 769                         ipv6_skip_exthdr(skb, exthdr - skb->data,
 770                                          &l4_proto_tmp, &frag_off);
 771         } else if (l3.v4->version == 4) {
 772                 l4_proto_tmp = l3.v4->protocol;
 773         }
 774
 775         *il4_proto = l4_proto_tmp;
 776
 777         return 0;
 778 }
 779
 780 /* when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
 781  * and it is udp packet, which has a dest port as the IANA assigned.
 782  * the hardware is expected to do the checksum offload, but the
 783  * hardware will not do the checksum offload when udp dest port is
 784  * 4789 or 6081.
 785  */
 786 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 787 {
 788         union l4_hdr_info l4;
 789
 790         l4.hdr = skb_transport_header(skb);
 791
 792         if (!(!skb->encapsulation &&
 793               (l4.udp->dest == htons(IANA_VXLAN_UDP_PORT) ||
 794               l4.udp->dest == htons(GENEVE_UDP_PORT))))
 795                 return false;
 796
 797         skb_checksum_help(skb);
 798
 799         return true;
 800 }
 801
 802 static void hns3_set_outer_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
 803                                   u32 *ol_type_vlan_len_msec)
 804 {
 805         u32 l2_len, l3_len, l4_len;
 806         unsigned char *il2_hdr;
 807         union l3_hdr_info l3;
 808         union l4_hdr_info l4;
 809
 810         l3.hdr = skb_network_header(skb);
 811         l4.hdr = skb_transport_header(skb);
 812
 813         /* compute OL2 header size, defined in 2 Bytes */
 814         l2_len = l3.hdr - skb->data;
 815         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L2LEN_S, l2_len >> 1);
 816
 817         /* compute OL3 header size, defined in 4 Bytes */
 818         l3_len = l4.hdr - l3.hdr;
 819         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L3LEN_S, l3_len >> 2);
 820
 821         il2_hdr = skb_inner_mac_header(skb);
 822         /* compute OL4 header size, defined in 4 Bytes */
 823         l4_len = il2_hdr - l4.hdr;
 824         hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_L4LEN_S, l4_len >> 2);
 825
 826         /* define outer network header type */
 827         if (skb->protocol == htons(ETH_P_IP)) {
 828                 if (skb_is_gso(skb))
 829                         hns3_set_field(*ol_type_vlan_len_msec,
 830                                        HNS3_TXD_OL3T_S,
 831                                        HNS3_OL3T_IPV4_CSUM);
 832                 else
 833                         hns3_set_field(*ol_type_vlan_len_msec,
 834                                        HNS3_TXD_OL3T_S,
 835                                        HNS3_OL3T_IPV4_NO_CSUM);
 836
 837         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 838                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_OL3T_S,
 839                                HNS3_OL3T_IPV6);
 840         }
 841
 842         if (ol4_proto == IPPROTO_UDP)
 843                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
 844                                HNS3_TUN_MAC_IN_UDP);
 845         else if (ol4_proto == IPPROTO_GRE)
 846                 hns3_set_field(*ol_type_vlan_len_msec, HNS3_TXD_TUNTYPE_S,
 847                                HNS3_TUN_NVGRE);
 848 }
 849
 850 static int hns3_set_l2l3l4(struct sk_buff *skb, u8 ol4_proto,
 851                            u8 il4_proto, u32 *type_cs_vlan_tso,
 852                            u32 *ol_type_vlan_len_msec)
 853 {
 854         unsigned char *l2_hdr = skb->data;
 855         u32 l4_proto = ol4_proto;
 856         union l4_hdr_info l4;
 857         union l3_hdr_info l3;
 858         u32 l2_len, l3_len;
 859
 860         l4.hdr = skb_transport_header(skb);
 861         l3.hdr = skb_network_header(skb);
 862
 863         /* handle encapsulation skb */
 864         if (skb->encapsulation) {
 865                 /* If this is a not UDP/GRE encapsulation skb */
 866                 if (!(ol4_proto == IPPROTO_UDP || ol4_proto == IPPROTO_GRE)) {
 867                         /* drop the skb tunnel packet if hardware don't support,
 868                          * because hardware can't calculate csum when TSO.
 869                          */
 870                         if (skb_is_gso(skb))
 871                                 return -EDOM;
 872
 873                         /* the stack computes the IP header already,
 874                          * driver calculate l4 checksum when not TSO.
 875                          */
 876                         skb_checksum_help(skb);
 877                         return 0;
 878                 }
 879
 880                 hns3_set_outer_l2l3l4(skb, ol4_proto, ol_type_vlan_len_msec);
 881
 882                 /* switch to inner header */
 883                 l2_hdr = skb_inner_mac_header(skb);
 884                 l3.hdr = skb_inner_network_header(skb);
 885                 l4.hdr = skb_inner_transport_header(skb);
 886                 l4_proto = il4_proto;
 887         }
 888
 889         if (l3.v4->version == 4) {
 890                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_S,
 891                                HNS3_L3T_IPV4);
 892
 893                 /* the stack computes the IP header already, the only time we
 894                  * need the hardware to recompute it is in the case of TSO.
 895                  */
 896                 if (skb_is_gso(skb))
 897                         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3CS_B, 1);
 898         } else if (l3.v6->version == 6) {
 899                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3T_S,
 900                                HNS3_L3T_IPV6);
 901         }
 902
 903         /* compute inner(/normal) L2 header size, defined in 2 Bytes */
 904         l2_len = l3.hdr - l2_hdr;
 905         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L2LEN_S, l2_len >> 1);
 906
 907         /* compute inner(/normal) L3 header size, defined in 4 Bytes */
 908         l3_len = l4.hdr - l3.hdr;
 909         hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L3LEN_S, l3_len >> 2);
 910
 911         /* compute inner(/normal) L4 header size, defined in 4 Bytes */
 912         switch (l4_proto) {
 913         case IPPROTO_TCP:
 914                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 915                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 916                                HNS3_L4T_TCP);
 917                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 918                                l4.tcp->doff);
 919                 break;
 920         case IPPROTO_UDP:
 921                 if (hns3_tunnel_csum_bug(skb))
 922                         break;
 923
 924                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 925                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 926                                HNS3_L4T_UDP);
 927                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 928                                (sizeof(struct udphdr) >> 2));
 929                 break;
 930         case IPPROTO_SCTP:
 931                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4CS_B, 1);
 932                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4T_S,
 933                                HNS3_L4T_SCTP);
 934                 hns3_set_field(*type_cs_vlan_tso, HNS3_TXD_L4LEN_S,
 935                                (sizeof(struct sctphdr) >> 2));
 936                 break;
 937         default:
 938                 /* drop the skb tunnel packet if hardware don't support,
 939                  * because hardware can't calculate csum when TSO.
 940                  */
 941                 if (skb_is_gso(skb))
 942                         return -EDOM;
 943
 944                 /* the stack computes the IP header already,
 945                  * driver calculate l4 checksum when not TSO.
 946                  */
 947                 skb_checksum_help(skb);
 948                 return 0;
 949         }
 950
 951         return 0;
 952 }
 953
 954 static int hns3_handle_vtags(struct hns3_enet_ring *tx_ring,
 955                              struct sk_buff *skb)
 956 {
 957         struct hnae3_handle *handle = tx_ring->tqp->handle;
 958         struct vlan_ethhdr *vhdr;
 959         int rc;
 960
 961         if (!(skb->protocol == htons(ETH_P_8021Q) ||
 962               skb_vlan_tag_present(skb)))
 963                 return 0;
 964
 965         /* Since HW limitation, if port based insert VLAN enabled, only one VLAN
 966          * header is allowed in skb, otherwise it will cause RAS error.
 967          */
 968         if (unlikely(skb_vlan_tagged_multi(skb) &&
 969                      handle->port_base_vlan_state ==
 970                      HNAE3_PORT_BASE_VLAN_ENABLE))
 971                 return -EINVAL;
 972
 973         if (skb->protocol == htons(ETH_P_8021Q) &&
 974             !(handle->kinfo.netdev->features & NETIF_F_HW_VLAN_CTAG_TX)) {
 975                 /* When HW VLAN acceleration is turned off, and the stack
 976                  * sets the protocol to 802.1q, the driver just need to
 977                  * set the protocol to the encapsulated ethertype.
 978                  */
 979                 skb->protocol = vlan_get_protocol(skb);
 980                 return 0;
 981         }
 982
 983         if (skb_vlan_tag_present(skb)) {
 984                 /* Based on hw strategy, use out_vtag in two layer tag case,
 985                  * and use inner_vtag in one tag case.
 986                  */
 987                 if (skb->protocol == htons(ETH_P_8021Q) &&
 988                     handle->port_base_vlan_state ==
 989                     HNAE3_PORT_BASE_VLAN_DISABLE)
 990                         rc = HNS3_OUTER_VLAN_TAG;
 991                 else
 992                         rc = HNS3_INNER_VLAN_TAG;
 993
 994                 skb->protocol = vlan_get_protocol(skb);
 995                 return rc;
 996         }
 997
 998         rc = skb_cow_head(skb, 0);
 999         if (unlikely(rc < 0))
1000                 return rc;
1001
1002         vhdr = (struct vlan_ethhdr *)skb->data;
1003         vhdr->h_vlan_TCI |= cpu_to_be16((skb->priority << VLAN_PRIO_SHIFT)
1004                                          & VLAN_PRIO_MASK);
1005
1006         skb->protocol = vlan_get_protocol(skb);
1007         return 0;
1008 }
1009
1010 static int hns3_fill_skb_desc(struct hns3_enet_ring *ring,
1011                               struct sk_buff *skb, struct hns3_desc *desc)
1012 {
1013         u32 ol_type_vlan_len_msec = 0;
1014         u32 type_cs_vlan_tso = 0;
1015         u32 paylen = skb->len;
1016         u16 inner_vtag = 0;
1017         u16 out_vtag = 0;
1018         u16 mss = 0;
1019         int ret;
1020
1021         ret = hns3_handle_vtags(ring, skb);
1022         if (unlikely(ret < 0)) {
1023                 u64_stats_update_begin(&ring->syncp);
1024                 ring->stats.tx_vlan_err++;
1025                 u64_stats_update_end(&ring->syncp);
1026                 return ret;
1027         } else if (ret == HNS3_INNER_VLAN_TAG) {
1028                 inner_vtag = skb_vlan_tag_get(skb);
1029                 inner_vtag |= (skb->priority << VLAN_PRIO_SHIFT) &
1030                                 VLAN_PRIO_MASK;
1031                 hns3_set_field(type_cs_vlan_tso, HNS3_TXD_VLAN_B, 1);
1032         } else if (ret == HNS3_OUTER_VLAN_TAG) {
1033                 out_vtag = skb_vlan_tag_get(skb);
1034                 out_vtag |= (skb->priority << VLAN_PRIO_SHIFT) &
1035                                 VLAN_PRIO_MASK;
1036                 hns3_set_field(ol_type_vlan_len_msec, HNS3_TXD_OVLAN_B,
1037                                1);
1038         }
1039
1040         if (skb->ip_summed == CHECKSUM_PARTIAL) {
1041                 u8 ol4_proto, il4_proto;
1042
1043                 skb_reset_mac_len(skb);
1044
1045                 ret = hns3_get_l4_protocol(skb, &ol4_proto, &il4_proto);
1046                 if (unlikely(ret < 0)) {
1047                         u64_stats_update_begin(&ring->syncp);
1048                         ring->stats.tx_l4_proto_err++;
1049                         u64_stats_update_end(&ring->syncp);
1050                         return ret;
1051                 }
1052
1053                 ret = hns3_set_l2l3l4(skb, ol4_proto, il4_proto,
1054                                       &type_cs_vlan_tso,
1055                                       &ol_type_vlan_len_msec);
1056                 if (unlikely(ret < 0)) {
1057                         u64_stats_update_begin(&ring->syncp);
1058                         ring->stats.tx_l2l3l4_err++;
1059                         u64_stats_update_end(&ring->syncp);
1060                         return ret;
1061                 }
1062
1063                 ret = hns3_set_tso(skb, &paylen, &mss,
1064                                    &type_cs_vlan_tso);
1065                 if (unlikely(ret < 0)) {
1066                         u64_stats_update_begin(&ring->syncp);
1067                         ring->stats.tx_tso_err++;
1068                         u64_stats_update_end(&ring->syncp);
1069                         return ret;
1070                 }
1071         }
1072
1073         /* Set txbd */
1074         desc->tx.ol_type_vlan_len_msec =
1075                 cpu_to_le32(ol_type_vlan_len_msec);
1076         desc->tx.type_cs_vlan_tso_len = cpu_to_le32(type_cs_vlan_tso);
1077         desc->tx.paylen = cpu_to_le32(paylen);
1078         desc->tx.mss = cpu_to_le16(mss);
1079         desc->tx.vlan_tag = cpu_to_le16(inner_vtag);
1080         desc->tx.outer_vlan_tag = cpu_to_le16(out_vtag);
1081
1082         return 0;
1083 }
1084
1085 static int hns3_fill_desc(struct hns3_enet_ring *ring, void *priv,
1086                           unsigned int size, enum hns_desc_type type)
1087 {
1088 #define HNS3_LIKELY_BD_NUM      1
1089
1090         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
1091         struct hns3_desc *desc = &ring->desc[ring->next_to_use];
1092         struct device *dev = ring_to_dev(ring);
1093         skb_frag_t *frag;
1094         unsigned int frag_buf_num;
1095         int k, sizeoflast;
1096         dma_addr_t dma;
1097
1098         if (type == DESC_TYPE_FRAGLIST_SKB ||
1099             type == DESC_TYPE_SKB) {
1100                 struct sk_buff *skb = (struct sk_buff *)priv;
1101
1102                 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
1103         } else {
1104                 frag = (skb_frag_t *)priv;
1105                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
1106         }
1107
1108         if (unlikely(dma_mapping_error(dev, dma))) {
1109                 u64_stats_update_begin(&ring->syncp);
1110                 ring->stats.sw_err_cnt++;
1111                 u64_stats_update_end(&ring->syncp);
1112                 return -ENOMEM;
1113         }
1114
1115         desc_cb->priv = priv;
1116         desc_cb->length = size;
1117         desc_cb->dma = dma;
1118         desc_cb->type = type;
1119
1120         if (likely(size <= HNS3_MAX_BD_SIZE)) {
1121                 desc->addr = cpu_to_le64(dma);
1122                 desc->tx.send_size = cpu_to_le16(size);
1123                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1124                         cpu_to_le16(BIT(HNS3_TXD_VLD_B));
1125
1126                 trace_hns3_tx_desc(ring, ring->next_to_use);
1127                 ring_ptr_move_fw(ring, next_to_use);
1128                 return HNS3_LIKELY_BD_NUM;
1129         }
1130
1131         frag_buf_num = hns3_tx_bd_count(size);
1132         sizeoflast = size % HNS3_MAX_BD_SIZE;
1133         sizeoflast = sizeoflast ? sizeoflast : HNS3_MAX_BD_SIZE;
1134
1135         /* When frag size is bigger than hardware limit, split this frag */
1136         for (k = 0; k < frag_buf_num; k++) {
1137                 /* now, fill the descriptor */
1138                 desc->addr = cpu_to_le64(dma + HNS3_MAX_BD_SIZE * k);
1139                 desc->tx.send_size = cpu_to_le16((k == frag_buf_num - 1) ?
1140                                      (u16)sizeoflast : (u16)HNS3_MAX_BD_SIZE);
1141                 desc->tx.bdtp_fe_sc_vld_ra_ri =
1142                                 cpu_to_le16(BIT(HNS3_TXD_VLD_B));
1143
1144                 trace_hns3_tx_desc(ring, ring->next_to_use);
1145                 /* move ring pointer to next */
1146                 ring_ptr_move_fw(ring, next_to_use);
1147
1148                 desc = &ring->desc[ring->next_to_use];
1149         }
1150
1151         return frag_buf_num;
1152 }
1153
1154 static unsigned int hns3_skb_bd_num(struct sk_buff *skb, unsigned int *bd_size,
1155                                     unsigned int bd_num)
1156 {
1157         unsigned int size;
1158         int i;
1159
1160         size = skb_headlen(skb);
1161         while (size > HNS3_MAX_BD_SIZE) {
1162                 bd_size[bd_num++] = HNS3_MAX_BD_SIZE;
1163                 size -= HNS3_MAX_BD_SIZE;
1164
1165                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1166                         return bd_num;
1167         }
1168
1169         if (size) {
1170                 bd_size[bd_num++] = size;
1171                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1172                         return bd_num;
1173         }
1174
1175         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1176                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1177                 size = skb_frag_size(frag);
1178                 if (!size)
1179                         continue;
1180
1181                 while (size > HNS3_MAX_BD_SIZE) {
1182                         bd_size[bd_num++] = HNS3_MAX_BD_SIZE;
1183                         size -= HNS3_MAX_BD_SIZE;
1184
1185                         if (bd_num > HNS3_MAX_TSO_BD_NUM)
1186                                 return bd_num;
1187                 }
1188
1189                 bd_size[bd_num++] = size;
1190                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1191                         return bd_num;
1192         }
1193
1194         return bd_num;
1195 }
1196
1197 static unsigned int hns3_tx_bd_num(struct sk_buff *skb, unsigned int *bd_size)
1198 {
1199         struct sk_buff *frag_skb;
1200         unsigned int bd_num = 0;
1201
1202         /* If the total len is within the max bd limit */
1203         if (likely(skb->len <= HNS3_MAX_BD_SIZE && !skb_has_frag_list(skb) &&
1204                    skb_shinfo(skb)->nr_frags < HNS3_MAX_NON_TSO_BD_NUM))
1205                 return skb_shinfo(skb)->nr_frags + 1U;
1206
1207         /* The below case will always be linearized, return
1208          * HNS3_MAX_BD_NUM_TSO + 1U to make sure it is linearized.
1209          */
1210         if (unlikely(skb->len > HNS3_MAX_TSO_SIZE ||
1211                      (!skb_is_gso(skb) && skb->len > HNS3_MAX_NON_TSO_SIZE)))
1212                 return HNS3_MAX_TSO_BD_NUM + 1U;
1213
1214         bd_num = hns3_skb_bd_num(skb, bd_size, bd_num);
1215
1216         if (!skb_has_frag_list(skb) || bd_num > HNS3_MAX_TSO_BD_NUM)
1217                 return bd_num;
1218
1219         skb_walk_frags(skb, frag_skb) {
1220                 bd_num = hns3_skb_bd_num(frag_skb, bd_size, bd_num);
1221                 if (bd_num > HNS3_MAX_TSO_BD_NUM)
1222                         return bd_num;
1223         }
1224
1225         return bd_num;
1226 }
1227
1228 static unsigned int hns3_gso_hdr_len(struct sk_buff *skb)
1229 {
1230         if (!skb->encapsulation)
1231                 return skb_transport_offset(skb) + tcp_hdrlen(skb);
1232
1233         return skb_inner_transport_offset(skb) + inner_tcp_hdrlen(skb);
1234 }
1235
1236 /* HW need every continuous 8 buffer data to be larger than MSS,
1237  * we simplify it by ensuring skb_headlen + the first continuous
1238  * 7 frags to to be larger than gso header len + mss, and the remaining
1239  * continuous 7 frags to be larger than MSS except the last 7 frags.
1240  */
1241 static bool hns3_skb_need_linearized(struct sk_buff *skb, unsigned int *bd_size,
1242                                      unsigned int bd_num)
1243 {
1244         unsigned int tot_len = 0;
1245         int i;
1246
1247         for (i = 0; i < HNS3_MAX_NON_TSO_BD_NUM - 1U; i++)
1248                 tot_len += bd_size[i];
1249
1250         /* ensure the first 8 frags is greater than mss + header */
1251         if (tot_len + bd_size[HNS3_MAX_NON_TSO_BD_NUM - 1U] <
1252             skb_shinfo(skb)->gso_size + hns3_gso_hdr_len(skb))
1253                 return true;
1254
1255         /* ensure every continuous 7 buffer is greater than mss
1256          * except the last one.
1257          */
1258         for (i = 0; i < bd_num - HNS3_MAX_NON_TSO_BD_NUM; i++) {
1259                 tot_len -= bd_size[i];
1260                 tot_len += bd_size[i + HNS3_MAX_NON_TSO_BD_NUM - 1U];
1261
1262                 if (tot_len < skb_shinfo(skb)->gso_size)
1263                         return true;
1264         }
1265
1266         return false;
1267 }
1268
1269 void hns3_shinfo_pack(struct skb_shared_info *shinfo, __u32 *size)
1270 {
1271         int i = 0;
1272
1273         for (i = 0; i < MAX_SKB_FRAGS; i++)
1274                 size[i] = skb_frag_size(&shinfo->frags[i]);
1275 }
1276
1277 static int hns3_nic_maybe_stop_tx(struct hns3_enet_ring *ring,
1278                                   struct net_device *netdev,
1279                                   struct sk_buff *skb)
1280 {
1281         struct hns3_nic_priv *priv = netdev_priv(netdev);
1282         unsigned int bd_size[HNS3_MAX_TSO_BD_NUM + 1U];
1283         unsigned int bd_num;
1284
1285         bd_num = hns3_tx_bd_num(skb, bd_size);
1286         if (unlikely(bd_num > HNS3_MAX_NON_TSO_BD_NUM)) {
1287                 if (bd_num <= HNS3_MAX_TSO_BD_NUM && skb_is_gso(skb) &&
1288                     !hns3_skb_need_linearized(skb, bd_size, bd_num)) {
1289                         trace_hns3_over_8bd(skb);
1290                         goto out;
1291                 }
1292
1293                 if (__skb_linearize(skb))
1294                         return -ENOMEM;
1295
1296                 bd_num = hns3_tx_bd_count(skb->len);
1297                 if ((skb_is_gso(skb) && bd_num > HNS3_MAX_TSO_BD_NUM) ||
1298                     (!skb_is_gso(skb) &&
1299                      bd_num > HNS3_MAX_NON_TSO_BD_NUM)) {
1300                         trace_hns3_over_8bd(skb);
1301                         return -ENOMEM;
1302                 }
1303
1304                 u64_stats_update_begin(&ring->syncp);
1305                 ring->stats.tx_copy++;
1306                 u64_stats_update_end(&ring->syncp);
1307         }
1308
1309 out:
1310         if (likely(ring_space(ring) >= bd_num))
1311                 return bd_num;
1312
1313         netif_stop_subqueue(netdev, ring->queue_index);
1314         smp_mb(); /* Memory barrier before checking ring_space */
1315
1316         /* Start queue in case hns3_clean_tx_ring has just made room
1317          * available and has not seen the queue stopped state performed
1318          * by netif_stop_subqueue above.
1319          */
1320         if (ring_space(ring) >= bd_num && netif_carrier_ok(netdev) &&
1321             !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
1322                 netif_start_subqueue(netdev, ring->queue_index);
1323                 return bd_num;
1324         }
1325
1326         return -EBUSY;
1327 }
1328
1329 static void hns3_clear_desc(struct hns3_enet_ring *ring, int next_to_use_orig)
1330 {
1331         struct device *dev = ring_to_dev(ring);
1332         unsigned int i;
1333
1334         for (i = 0; i < ring->desc_num; i++) {
1335                 struct hns3_desc *desc = &ring->desc[ring->next_to_use];
1336
1337                 memset(desc, 0, sizeof(*desc));
1338
1339                 /* check if this is where we started */
1340                 if (ring->next_to_use == next_to_use_orig)
1341                         break;
1342
1343                 /* rollback one */
1344                 ring_ptr_move_bw(ring, next_to_use);
1345
1346                 if (!ring->desc_cb[ring->next_to_use].dma)
1347                         continue;
1348
1349                 /* unmap the descriptor dma address */
1350                 if (ring->desc_cb[ring->next_to_use].type == DESC_TYPE_SKB ||
1351                     ring->desc_cb[ring->next_to_use].type ==
1352                     DESC_TYPE_FRAGLIST_SKB)
1353                         dma_unmap_single(dev,
1354                                          ring->desc_cb[ring->next_to_use].dma,
1355                                         ring->desc_cb[ring->next_to_use].length,
1356                                         DMA_TO_DEVICE);
1357                 else if (ring->desc_cb[ring->next_to_use].length)
1358                         dma_unmap_page(dev,
1359                                        ring->desc_cb[ring->next_to_use].dma,
1360                                        ring->desc_cb[ring->next_to_use].length,
1361                                        DMA_TO_DEVICE);
1362
1363                 ring->desc_cb[ring->next_to_use].length = 0;
1364                 ring->desc_cb[ring->next_to_use].dma = 0;
1365                 ring->desc_cb[ring->next_to_use].type = DESC_TYPE_UNKNOWN;
1366         }
1367 }
1368
1369 static int hns3_fill_skb_to_desc(struct hns3_enet_ring *ring,
1370                                  struct sk_buff *skb, enum hns_desc_type type)
1371 {
1372         unsigned int size = skb_headlen(skb);
1373         int i, ret, bd_num = 0;
1374
1375         if (size) {
1376                 ret = hns3_fill_desc(ring, skb, size, type);
1377                 if (unlikely(ret < 0))
1378                         return ret;
1379
1380                 bd_num += ret;
1381         }
1382
1383         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1384                 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1385
1386                 size = skb_frag_size(frag);
1387                 if (!size)
1388                         continue;
1389
1390                 ret = hns3_fill_desc(ring, frag, size, DESC_TYPE_PAGE);
1391                 if (unlikely(ret < 0))
1392                         return ret;
1393
1394                 bd_num += ret;
1395         }
1396
1397         return bd_num;
1398 }
1399
1400 netdev_tx_t hns3_nic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
1401 {
1402         struct hns3_nic_priv *priv = netdev_priv(netdev);
1403         struct hns3_enet_ring *ring = &priv->ring[skb->queue_mapping];
1404         struct netdev_queue *dev_queue;
1405         int pre_ntu, next_to_use_head;
1406         struct sk_buff *frag_skb;
1407         int bd_num = 0;
1408         int ret;
1409
1410         /* Hardware can only handle short frames above 32 bytes */
1411         if (skb_put_padto(skb, HNS3_MIN_TX_LEN))
1412                 return NETDEV_TX_OK;
1413
1414         /* Prefetch the data used later */
1415         prefetch(skb->data);
1416
1417         ret = hns3_nic_maybe_stop_tx(ring, netdev, skb);
1418         if (unlikely(ret <= 0)) {
1419                 if (ret == -EBUSY) {
1420                         u64_stats_update_begin(&ring->syncp);
1421                         ring->stats.tx_busy++;
1422                         u64_stats_update_end(&ring->syncp);
1423                         return NETDEV_TX_BUSY;
1424                 } else if (ret == -ENOMEM) {
1425                         u64_stats_update_begin(&ring->syncp);
1426                         ring->stats.sw_err_cnt++;
1427                         u64_stats_update_end(&ring->syncp);
1428                 }
1429
1430                 hns3_rl_err(netdev, "xmit error: %d!\n", ret);
1431                 goto out_err_tx_ok;
1432         }
1433
1434         next_to_use_head = ring->next_to_use;
1435
1436         ret = hns3_fill_skb_desc(ring, skb, &ring->desc[ring->next_to_use]);
1437         if (unlikely(ret < 0))
1438                 goto fill_err;
1439
1440         ret = hns3_fill_skb_to_desc(ring, skb, DESC_TYPE_SKB);
1441         if (unlikely(ret < 0))
1442                 goto fill_err;
1443
1444         bd_num += ret;
1445
1446         skb_walk_frags(skb, frag_skb) {
1447                 ret = hns3_fill_skb_to_desc(ring, frag_skb,
1448                                             DESC_TYPE_FRAGLIST_SKB);
1449                 if (unlikely(ret < 0))
1450                         goto fill_err;
1451
1452                 bd_num += ret;
1453         }
1454
1455         pre_ntu = ring->next_to_use ? (ring->next_to_use - 1) :
1456                                         (ring->desc_num - 1);
1457         ring->desc[pre_ntu].tx.bdtp_fe_sc_vld_ra_ri |=
1458                                 cpu_to_le16(BIT(HNS3_TXD_FE_B));
1459         trace_hns3_tx_desc(ring, pre_ntu);
1460
1461         /* Complete translate all packets */
1462         dev_queue = netdev_get_tx_queue(netdev, ring->queue_index);
1463         netdev_tx_sent_queue(dev_queue, skb->len);
1464
1465         wmb(); /* Commit all data before submit */
1466
1467         hnae3_queue_xmit(ring->tqp, bd_num);
1468
1469         return NETDEV_TX_OK;
1470
1471 fill_err:
1472         hns3_clear_desc(ring, next_to_use_head);
1473
1474 out_err_tx_ok:
1475         dev_kfree_skb_any(skb);
1476         return NETDEV_TX_OK;
1477 }
1478
1479 static int hns3_nic_net_set_mac_address(struct net_device *netdev, void *p)
1480 {
1481         struct hnae3_handle *h = hns3_get_handle(netdev);
1482         struct sockaddr *mac_addr = p;
1483         int ret;
1484
1485         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1486                 return -EADDRNOTAVAIL;
1487
1488         if (ether_addr_equal(netdev->dev_addr, mac_addr->sa_data)) {
1489                 netdev_info(netdev, "already using mac address %pM\n",
1490                             mac_addr->sa_data);
1491                 return 0;
1492         }
1493
1494         /* For VF device, if there is a perm_addr, then the user will not
1495          * be allowed to change the address.
1496          */
1497         if (!hns3_is_phys_func(h->pdev) &&
1498             !is_zero_ether_addr(netdev->perm_addr)) {
1499                 netdev_err(netdev, "has permanent MAC %pM, user MAC %pM not allow\n",
1500                            netdev->perm_addr, mac_addr->sa_data);
1501                 return -EPERM;
1502         }
1503
1504         ret = h->ae_algo->ops->set_mac_addr(h, mac_addr->sa_data, false);
1505         if (ret) {
1506                 netdev_err(netdev, "set_mac_address fail, ret=%d!\n", ret);
1507                 return ret;
1508         }
1509
1510         ether_addr_copy(netdev->dev_addr, mac_addr->sa_data);
1511
1512         return 0;
1513 }
1514
1515 static int hns3_nic_do_ioctl(struct net_device *netdev,
1516                              struct ifreq *ifr, int cmd)
1517 {
1518         struct hnae3_handle *h = hns3_get_handle(netdev);
1519
1520         if (!netif_running(netdev))
1521                 return -EINVAL;
1522
1523         if (!h->ae_algo->ops->do_ioctl)
1524                 return -EOPNOTSUPP;
1525
1526         return h->ae_algo->ops->do_ioctl(h, ifr, cmd);
1527 }
1528
1529 static int hns3_nic_set_features(struct net_device *netdev,
1530                                  netdev_features_t features)
1531 {
1532         netdev_features_t changed = netdev->features ^ features;
1533         struct hns3_nic_priv *priv = netdev_priv(netdev);
1534         struct hnae3_handle *h = priv->ae_handle;
1535         bool enable;
1536         int ret;
1537
1538         if (changed & (NETIF_F_GRO_HW) && h->ae_algo->ops->set_gro_en) {
1539                 enable = !!(features & NETIF_F_GRO_HW);
1540                 ret = h->ae_algo->ops->set_gro_en(h, enable);
1541                 if (ret)
1542                         return ret;
1543         }
1544
1545         if ((changed & NETIF_F_HW_VLAN_CTAG_RX) &&
1546             h->ae_algo->ops->enable_hw_strip_rxvtag) {
1547                 enable = !!(features & NETIF_F_HW_VLAN_CTAG_RX);
1548                 ret = h->ae_algo->ops->enable_hw_strip_rxvtag(h, enable);
1549                 if (ret)
1550                         return ret;
1551         }
1552
1553         if ((changed & NETIF_F_NTUPLE) && h->ae_algo->ops->enable_fd) {
1554                 enable = !!(features & NETIF_F_NTUPLE);
1555                 h->ae_algo->ops->enable_fd(h, enable);
1556         }
1557
1558         netdev->features = features;
1559         return 0;
1560 }
1561
1562 static netdev_features_t hns3_features_check(struct sk_buff *skb,
1563                                              struct net_device *dev,
1564                                              netdev_features_t features)
1565 {
1566 #define HNS3_MAX_HDR_LEN        480U
1567 #define HNS3_MAX_L4_HDR_LEN     60U
1568
1569         size_t len;
1570
1571         if (skb->ip_summed != CHECKSUM_PARTIAL)
1572                 return features;
1573
1574         if (skb->encapsulation)
1575                 len = skb_inner_transport_header(skb) - skb->data;
1576         else
1577                 len = skb_transport_header(skb) - skb->data;
1578
1579         /* Assume L4 is 60 byte as TCP is the only protocol with a
1580          * a flexible value, and it's max len is 60 bytes.
1581          */
1582         len += HNS3_MAX_L4_HDR_LEN;
1583
1584         /* Hardware only supports checksum on the skb with a max header
1585          * len of 480 bytes.
1586          */
1587         if (len > HNS3_MAX_HDR_LEN)
1588                 features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
1589
1590         return features;
1591 }
1592
1593 static void hns3_nic_get_stats64(struct net_device *netdev,
1594                                  struct rtnl_link_stats64 *stats)
1595 {
1596         struct hns3_nic_priv *priv = netdev_priv(netdev);
1597         int queue_num = priv->ae_handle->kinfo.num_tqps;
1598         struct hnae3_handle *handle = priv->ae_handle;
1599         struct hns3_enet_ring *ring;
1600         u64 rx_length_errors = 0;
1601         u64 rx_crc_errors = 0;
1602         u64 rx_multicast = 0;
1603         unsigned int start;
1604         u64 tx_errors = 0;
1605         u64 rx_errors = 0;
1606         unsigned int idx;
1607         u64 tx_bytes = 0;
1608         u64 rx_bytes = 0;
1609         u64 tx_pkts = 0;
1610         u64 rx_pkts = 0;
1611         u64 tx_drop = 0;
1612         u64 rx_drop = 0;
1613
1614         if (test_bit(HNS3_NIC_STATE_DOWN, &priv->state))
1615                 return;
1616
1617         handle->ae_algo->ops->update_stats(handle, &netdev->stats);
1618
1619         for (idx = 0; idx < queue_num; idx++) {
1620                 /* fetch the tx stats */
1621                 ring = &priv->ring[idx];
1622                 do {
1623                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1624                         tx_bytes += ring->stats.tx_bytes;
1625                         tx_pkts += ring->stats.tx_pkts;
1626                         tx_drop += ring->stats.sw_err_cnt;
1627                         tx_drop += ring->stats.tx_vlan_err;
1628                         tx_drop += ring->stats.tx_l4_proto_err;
1629                         tx_drop += ring->stats.tx_l2l3l4_err;
1630                         tx_drop += ring->stats.tx_tso_err;
1631                         tx_errors += ring->stats.sw_err_cnt;
1632                         tx_errors += ring->stats.tx_vlan_err;
1633                         tx_errors += ring->stats.tx_l4_proto_err;
1634                         tx_errors += ring->stats.tx_l2l3l4_err;
1635                         tx_errors += ring->stats.tx_tso_err;
1636                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1637
1638                 /* fetch the rx stats */
1639                 ring = &priv->ring[idx + queue_num];
1640                 do {
1641                         start = u64_stats_fetch_begin_irq(&ring->syncp);
1642                         rx_bytes += ring->stats.rx_bytes;
1643                         rx_pkts += ring->stats.rx_pkts;
1644                         rx_drop += ring->stats.l2_err;
1645                         rx_errors += ring->stats.l2_err;
1646                         rx_errors += ring->stats.l3l4_csum_err;
1647                         rx_crc_errors += ring->stats.l2_err;
1648                         rx_multicast += ring->stats.rx_multicast;
1649                         rx_length_errors += ring->stats.err_pkt_len;
1650                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
1651         }
1652
1653         stats->tx_bytes = tx_bytes;
1654         stats->tx_packets = tx_pkts;
1655         stats->rx_bytes = rx_bytes;
1656         stats->rx_packets = rx_pkts;
1657
1658         stats->rx_errors = rx_errors;
1659         stats->multicast = rx_multicast;
1660         stats->rx_length_errors = rx_length_errors;
1661         stats->rx_crc_errors = rx_crc_errors;
1662         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
1663
1664         stats->tx_errors = tx_errors;
1665         stats->rx_dropped = rx_drop;
1666         stats->tx_dropped = tx_drop;
1667         stats->collisions = netdev->stats.collisions;
1668         stats->rx_over_errors = netdev->stats.rx_over_errors;
1669         stats->rx_frame_errors = netdev->stats.rx_frame_errors;
1670         stats->rx_fifo_errors = netdev->stats.rx_fifo_errors;
1671         stats->tx_aborted_errors = netdev->stats.tx_aborted_errors;
1672         stats->tx_carrier_errors = netdev->stats.tx_carrier_errors;
1673         stats->tx_fifo_errors = netdev->stats.tx_fifo_errors;
1674         stats->tx_heartbeat_errors = netdev->stats.tx_heartbeat_errors;
1675         stats->tx_window_errors = netdev->stats.tx_window_errors;
1676         stats->rx_compressed = netdev->stats.rx_compressed;
1677         stats->tx_compressed = netdev->stats.tx_compressed;
1678 }
1679
1680 static int hns3_setup_tc(struct net_device *netdev, void *type_data)
1681 {
1682         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
1683         u8 *prio_tc = mqprio_qopt->qopt.prio_tc_map;
1684         struct hnae3_knic_private_info *kinfo;
1685         u8 tc = mqprio_qopt->qopt.num_tc;
1686         u16 mode = mqprio_qopt->mode;
1687         u8 hw = mqprio_qopt->qopt.hw;
1688         struct hnae3_handle *h;
1689
1690         if (!((hw == TC_MQPRIO_HW_OFFLOAD_TCS &&
1691                mode == TC_MQPRIO_MODE_CHANNEL) || (!hw && tc == 0)))
1692                 return -EOPNOTSUPP;
1693
1694         if (tc > HNAE3_MAX_TC)
1695                 return -EINVAL;
1696
1697         if (!netdev)
1698                 return -EINVAL;
1699
1700         h = hns3_get_handle(netdev);
1701         kinfo = &h->kinfo;
1702
1703         netif_dbg(h, drv, netdev, "setup tc: num_tc=%u\n", tc);
1704
1705         return (kinfo->dcb_ops && kinfo->dcb_ops->setup_tc) ?
1706                 kinfo->dcb_ops->setup_tc(h, tc ? tc : 1, prio_tc) : -EOPNOTSUPP;
1707 }
1708
1709 static int hns3_nic_setup_tc(struct net_device *dev, enum tc_setup_type type,
1710                              void *type_data)
1711 {
1712         if (type != TC_SETUP_QDISC_MQPRIO)
1713                 return -EOPNOTSUPP;
1714
1715         return hns3_setup_tc(dev, type_data);
1716 }
1717
1718 static int hns3_vlan_rx_add_vid(struct net_device *netdev,
1719                                 __be16 proto, u16 vid)
1720 {
1721         struct hnae3_handle *h = hns3_get_handle(netdev);
1722         int ret = -EIO;
1723
1724         if (h->ae_algo->ops->set_vlan_filter)
1725                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, false);
1726
1727         return ret;
1728 }
1729
1730 static int hns3_vlan_rx_kill_vid(struct net_device *netdev,
1731                                  __be16 proto, u16 vid)
1732 {
1733         struct hnae3_handle *h = hns3_get_handle(netdev);
1734         int ret = -EIO;
1735
1736         if (h->ae_algo->ops->set_vlan_filter)
1737                 ret = h->ae_algo->ops->set_vlan_filter(h, proto, vid, true);
1738
1739         return ret;
1740 }
1741
1742 static int hns3_ndo_set_vf_vlan(struct net_device *netdev, int vf, u16 vlan,
1743                                 u8 qos, __be16 vlan_proto)
1744 {
1745         struct hnae3_handle *h = hns3_get_handle(netdev);
1746         int ret = -EIO;
1747
1748         netif_dbg(h, drv, netdev,
1749                   "set vf vlan: vf=%d, vlan=%u, qos=%u, vlan_proto=0x%x\n",
1750                   vf, vlan, qos, ntohs(vlan_proto));
1751
1752         if (h->ae_algo->ops->set_vf_vlan_filter)
1753                 ret = h->ae_algo->ops->set_vf_vlan_filter(h, vf, vlan,
1754                                                           qos, vlan_proto);
1755
1756         return ret;
1757 }
1758
1759 static int hns3_set_vf_spoofchk(struct net_device *netdev, int vf, bool enable)
1760 {
1761         struct hnae3_handle *handle = hns3_get_handle(netdev);
1762
1763         if (hns3_nic_resetting(netdev))
1764                 return -EBUSY;
1765
1766         if (!handle->ae_algo->ops->set_vf_spoofchk)
1767                 return -EOPNOTSUPP;
1768
1769         return handle->ae_algo->ops->set_vf_spoofchk(handle, vf, enable);
1770 }
1771
1772 static int hns3_set_vf_trust(struct net_device *netdev, int vf, bool enable)
1773 {
1774         struct hnae3_handle *handle = hns3_get_handle(netdev);
1775
1776         if (!handle->ae_algo->ops->set_vf_trust)
1777                 return -EOPNOTSUPP;
1778
1779         return handle->ae_algo->ops->set_vf_trust(handle, vf, enable);
1780 }
1781
1782 static int hns3_nic_change_mtu(struct net_device *netdev, int new_mtu)
1783 {
1784         struct hnae3_handle *h = hns3_get_handle(netdev);
1785         int ret;
1786
1787         if (hns3_nic_resetting(netdev))
1788                 return -EBUSY;
1789
1790         if (!h->ae_algo->ops->set_mtu)
1791                 return -EOPNOTSUPP;
1792
1793         netif_dbg(h, drv, netdev,
1794                   "change mtu from %u to %d\n", netdev->mtu, new_mtu);
1795
1796         ret = h->ae_algo->ops->set_mtu(h, new_mtu);
1797         if (ret)
1798                 netdev_err(netdev, "failed to change MTU in hardware %d\n",
1799                            ret);
1800         else
1801                 netdev->mtu = new_mtu;
1802
1803         return ret;
1804 }
1805
1806 static bool hns3_get_tx_timeo_queue_info(struct net_device *ndev)
1807 {
1808         struct hns3_nic_priv *priv = netdev_priv(ndev);
1809         struct hnae3_handle *h = hns3_get_handle(ndev);
1810         struct hns3_enet_ring *tx_ring;
1811         struct napi_struct *napi;
1812         int timeout_queue = 0;
1813         int hw_head, hw_tail;
1814         int fbd_num, fbd_oft;
1815         int ebd_num, ebd_oft;
1816         int bd_num, bd_err;
1817         int ring_en, tc;
1818         int i;
1819
1820         /* Find the stopped queue the same way the stack does */
1821         for (i = 0; i < ndev->num_tx_queues; i++) {
1822                 struct netdev_queue *q;
1823                 unsigned long trans_start;
1824
1825                 q = netdev_get_tx_queue(ndev, i);
1826                 trans_start = q->trans_start;
1827                 if (netif_xmit_stopped(q) &&
1828                     time_after(jiffies,
1829                                (trans_start + ndev->watchdog_timeo))) {
1830                         timeout_queue = i;
1831                         netdev_info(ndev, "queue state: 0x%lx, delta msecs: %u\n",
1832                                     q->state,
1833                                     jiffies_to_msecs(jiffies - trans_start));
1834                         break;
1835                 }
1836         }
1837
1838         if (i == ndev->num_tx_queues) {
1839                 netdev_info(ndev,
1840                             "no netdev TX timeout queue found, timeout count: %llu\n",
1841                             priv->tx_timeout_count);
1842                 return false;
1843         }
1844
1845         priv->tx_timeout_count++;
1846
1847         tx_ring = &priv->ring[timeout_queue];
1848         napi = &tx_ring->tqp_vector->napi;
1849
1850         netdev_info(ndev,
1851                     "tx_timeout count: %llu, queue id: %d, SW_NTU: 0x%x, SW_NTC: 0x%x, napi state: %lu\n",
1852                     priv->tx_timeout_count, timeout_queue, tx_ring->next_to_use,
1853                     tx_ring->next_to_clean, napi->state);
1854
1855         netdev_info(ndev,
1856                     "tx_pkts: %llu, tx_bytes: %llu, io_err_cnt: %llu, sw_err_cnt: %llu\n",
1857                     tx_ring->stats.tx_pkts, tx_ring->stats.tx_bytes,
1858                     tx_ring->stats.io_err_cnt, tx_ring->stats.sw_err_cnt);
1859
1860         netdev_info(ndev,
1861                     "seg_pkt_cnt: %llu, tx_err_cnt: %llu, restart_queue: %llu, tx_busy: %llu\n",
1862                     tx_ring->stats.seg_pkt_cnt, tx_ring->stats.tx_err_cnt,
1863                     tx_ring->stats.restart_queue, tx_ring->stats.tx_busy);
1864
1865         /* When mac received many pause frames continuous, it's unable to send
1866          * packets, which may cause tx timeout
1867          */
1868         if (h->ae_algo->ops->get_mac_stats) {
1869                 struct hns3_mac_stats mac_stats;
1870
1871                 h->ae_algo->ops->get_mac_stats(h, &mac_stats);
1872                 netdev_info(ndev, "tx_pause_cnt: %llu, rx_pause_cnt: %llu\n",
1873                             mac_stats.tx_pause_cnt, mac_stats.rx_pause_cnt);
1874         }
1875
1876         hw_head = readl_relaxed(tx_ring->tqp->io_base +
1877                                 HNS3_RING_TX_RING_HEAD_REG);
1878         hw_tail = readl_relaxed(tx_ring->tqp->io_base +
1879                                 HNS3_RING_TX_RING_TAIL_REG);
1880         fbd_num = readl_relaxed(tx_ring->tqp->io_base +
1881                                 HNS3_RING_TX_RING_FBDNUM_REG);
1882         fbd_oft = readl_relaxed(tx_ring->tqp->io_base +
1883                                 HNS3_RING_TX_RING_OFFSET_REG);
1884         ebd_num = readl_relaxed(tx_ring->tqp->io_base +
1885                                 HNS3_RING_TX_RING_EBDNUM_REG);
1886         ebd_oft = readl_relaxed(tx_ring->tqp->io_base +
1887                                 HNS3_RING_TX_RING_EBD_OFFSET_REG);
1888         bd_num = readl_relaxed(tx_ring->tqp->io_base +
1889                                HNS3_RING_TX_RING_BD_NUM_REG);
1890         bd_err = readl_relaxed(tx_ring->tqp->io_base +
1891                                HNS3_RING_TX_RING_BD_ERR_REG);
1892         ring_en = readl_relaxed(tx_ring->tqp->io_base + HNS3_RING_EN_REG);
1893         tc = readl_relaxed(tx_ring->tqp->io_base + HNS3_RING_TX_RING_TC_REG);
1894
1895         netdev_info(ndev,
1896                     "BD_NUM: 0x%x HW_HEAD: 0x%x, HW_TAIL: 0x%x, BD_ERR: 0x%x, INT: 0x%x\n",
1897                     bd_num, hw_head, hw_tail, bd_err,
1898                     readl(tx_ring->tqp_vector->mask_addr));
1899         netdev_info(ndev,
1900                     "RING_EN: 0x%x, TC: 0x%x, FBD_NUM: 0x%x FBD_OFT: 0x%x, EBD_NUM: 0x%x, EBD_OFT: 0x%x\n",
1901                     ring_en, tc, fbd_num, fbd_oft, ebd_num, ebd_oft);
1902
1903         return true;
1904 }
1905
1906 static void hns3_nic_net_timeout(struct net_device *ndev, unsigned int txqueue)
1907 {
1908         struct hns3_nic_priv *priv = netdev_priv(ndev);
1909         struct hnae3_handle *h = priv->ae_handle;
1910
1911         if (!hns3_get_tx_timeo_queue_info(ndev))
1912                 return;
1913
1914         /* request the reset, and let the hclge to determine
1915          * which reset level should be done
1916          */
1917         if (h->ae_algo->ops->reset_event)
1918                 h->ae_algo->ops->reset_event(h->pdev, h);
1919 }
1920
1921 #ifdef CONFIG_RFS_ACCEL
1922 static int hns3_rx_flow_steer(struct net_device *dev, const struct sk_buff *skb,
1923                               u16 rxq_index, u32 flow_id)
1924 {
1925         struct hnae3_handle *h = hns3_get_handle(dev);
1926         struct flow_keys fkeys;
1927
1928         if (!h->ae_algo->ops->add_arfs_entry)
1929                 return -EOPNOTSUPP;
1930
1931         if (skb->encapsulation)
1932                 return -EPROTONOSUPPORT;
1933
1934         if (!skb_flow_dissect_flow_keys(skb, &fkeys, 0))
1935                 return -EPROTONOSUPPORT;
1936
1937         if ((fkeys.basic.n_proto != htons(ETH_P_IP) &&
1938              fkeys.basic.n_proto != htons(ETH_P_IPV6)) ||
1939             (fkeys.basic.ip_proto != IPPROTO_TCP &&
1940              fkeys.basic.ip_proto != IPPROTO_UDP))
1941                 return -EPROTONOSUPPORT;
1942
1943         return h->ae_algo->ops->add_arfs_entry(h, rxq_index, flow_id, &fkeys);
1944 }
1945 #endif
1946
1947 static int hns3_nic_get_vf_config(struct net_device *ndev, int vf,
1948                                   struct ifla_vf_info *ivf)
1949 {
1950         struct hnae3_handle *h = hns3_get_handle(ndev);
1951
1952         if (!h->ae_algo->ops->get_vf_config)
1953                 return -EOPNOTSUPP;
1954
1955         return h->ae_algo->ops->get_vf_config(h, vf, ivf);
1956 }
1957
1958 static int hns3_nic_set_vf_link_state(struct net_device *ndev, int vf,
1959                                       int link_state)
1960 {
1961         struct hnae3_handle *h = hns3_get_handle(ndev);
1962
1963         if (!h->ae_algo->ops->set_vf_link_state)
1964                 return -EOPNOTSUPP;
1965
1966         return h->ae_algo->ops->set_vf_link_state(h, vf, link_state);
1967 }
1968
1969 static int hns3_nic_set_vf_rate(struct net_device *ndev, int vf,
1970                                 int min_tx_rate, int max_tx_rate)
1971 {
1972         struct hnae3_handle *h = hns3_get_handle(ndev);
1973
1974         if (!h->ae_algo->ops->set_vf_rate)
1975                 return -EOPNOTSUPP;
1976
1977         return h->ae_algo->ops->set_vf_rate(h, vf, min_tx_rate, max_tx_rate,
1978                                             false);
1979 }
1980
1981 static int hns3_nic_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
1982 {
1983         struct hnae3_handle *h = hns3_get_handle(netdev);
1984
1985         if (!h->ae_algo->ops->set_vf_mac)
1986                 return -EOPNOTSUPP;
1987
1988         if (is_multicast_ether_addr(mac)) {
1989                 netdev_err(netdev,
1990                            "Invalid MAC:%pM specified. Could not set MAC\n",
1991                            mac);
1992                 return -EINVAL;
1993         }
1994
1995         return h->ae_algo->ops->set_vf_mac(h, vf_id, mac);
1996 }
1997
1998 static const struct net_device_ops hns3_nic_netdev_ops = {
1999         .ndo_open               = hns3_nic_net_open,
2000         .ndo_stop               = hns3_nic_net_stop,
2001         .ndo_start_xmit         = hns3_nic_net_xmit,
2002         .ndo_tx_timeout         = hns3_nic_net_timeout,
2003         .ndo_set_mac_address    = hns3_nic_net_set_mac_address,
2004         .ndo_do_ioctl           = hns3_nic_do_ioctl,
2005         .ndo_change_mtu         = hns3_nic_change_mtu,
2006         .ndo_set_features       = hns3_nic_set_features,
2007         .ndo_features_check     = hns3_features_check,
2008         .ndo_get_stats64        = hns3_nic_get_stats64,
2009         .ndo_setup_tc           = hns3_nic_setup_tc,
2010         .ndo_set_rx_mode        = hns3_nic_set_rx_mode,
2011         .ndo_vlan_rx_add_vid    = hns3_vlan_rx_add_vid,
2012         .ndo_vlan_rx_kill_vid   = hns3_vlan_rx_kill_vid,
2013         .ndo_set_vf_vlan        = hns3_ndo_set_vf_vlan,
2014         .ndo_set_vf_spoofchk    = hns3_set_vf_spoofchk,
2015         .ndo_set_vf_trust       = hns3_set_vf_trust,
2016 #ifdef CONFIG_RFS_ACCEL
2017         .ndo_rx_flow_steer      = hns3_rx_flow_steer,
2018 #endif
2019         .ndo_get_vf_config      = hns3_nic_get_vf_config,
2020         .ndo_set_vf_link_state  = hns3_nic_set_vf_link_state,
2021         .ndo_set_vf_rate        = hns3_nic_set_vf_rate,
2022         .ndo_set_vf_mac         = hns3_nic_set_vf_mac,
2023 };
2024
2025 bool hns3_is_phys_func(struct pci_dev *pdev)
2026 {
2027         u32 dev_id = pdev->device;
2028
2029         switch (dev_id) {
2030         case HNAE3_DEV_ID_GE:
2031         case HNAE3_DEV_ID_25GE:
2032         case HNAE3_DEV_ID_25GE_RDMA:
2033         case HNAE3_DEV_ID_25GE_RDMA_MACSEC:
2034         case HNAE3_DEV_ID_50GE_RDMA:
2035         case HNAE3_DEV_ID_50GE_RDMA_MACSEC:
2036         case HNAE3_DEV_ID_100G_RDMA_MACSEC:
2037                 return true;
2038         case HNAE3_DEV_ID_100G_VF:
2039         case HNAE3_DEV_ID_100G_RDMA_DCB_PFC_VF:
2040                 return false;
2041         default:
2042                 dev_warn(&pdev->dev, "un-recognized pci device-id %u",
2043                          dev_id);
2044         }
2045
2046         return false;
2047 }
2048
2049 static void hns3_disable_sriov(struct pci_dev *pdev)
2050 {
2051         /* If our VFs are assigned we cannot shut down SR-IOV
2052          * without causing issues, so just leave the hardware
2053          * available but disabled
2054          */
2055         if (pci_vfs_assigned(pdev)) {
2056                 dev_warn(&pdev->dev,
2057                          "disabling driver while VFs are assigned\n");
2058                 return;
2059         }
2060
2061         pci_disable_sriov(pdev);
2062 }
2063
2064 static void hns3_get_dev_capability(struct pci_dev *pdev,
2065                                     struct hnae3_ae_dev *ae_dev)
2066 {
2067         if (pdev->revision >= 0x21) {
2068                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_FD_B, 1);
2069                 hnae3_set_bit(ae_dev->flag, HNAE3_DEV_SUPPORT_GRO_B, 1);
2070         }
2071 }
2072
2073 /* hns3_probe - Device initialization routine
2074  * @pdev: PCI device information struct
2075  * @ent: entry in hns3_pci_tbl
2076  *
2077  * hns3_probe initializes a PF identified by a pci_dev structure.
2078  * The OS initialization, configuring of the PF private structure,
2079  * and a hardware reset occur.
2080  *
2081  * Returns 0 on success, negative on failure
2082  */
2083 static int hns3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2084 {
2085         struct hnae3_ae_dev *ae_dev;
2086         int ret;
2087
2088         ae_dev = devm_kzalloc(&pdev->dev, sizeof(*ae_dev), GFP_KERNEL);
2089         if (!ae_dev)
2090                 return -ENOMEM;
2091
2092         ae_dev->pdev = pdev;
2093         ae_dev->flag = ent->driver_data;
2094         hns3_get_dev_capability(pdev, ae_dev);
2095         pci_set_drvdata(pdev, ae_dev);
2096
2097         ret = hnae3_register_ae_dev(ae_dev);
2098         if (ret)
2099                 pci_set_drvdata(pdev, NULL);
2100
2101         return ret;
2102 }
2103
2104 /* hns3_remove - Device removal routine
2105  * @pdev: PCI device information struct
2106  */
2107 static void hns3_remove(struct pci_dev *pdev)
2108 {
2109         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2110
2111         if (hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))
2112                 hns3_disable_sriov(pdev);
2113
2114         hnae3_unregister_ae_dev(ae_dev);
2115         pci_set_drvdata(pdev, NULL);
2116 }
2117
2118 /**
2119  * hns3_pci_sriov_configure
2120  * @pdev: pointer to a pci_dev structure
2121  * @num_vfs: number of VFs to allocate
2122  *
2123  * Enable or change the number of VFs. Called when the user updates the number
2124  * of VFs in sysfs.
2125  **/
2126 static int hns3_pci_sriov_configure(struct pci_dev *pdev, int num_vfs)
2127 {
2128         int ret;
2129
2130         if (!(hns3_is_phys_func(pdev) && IS_ENABLED(CONFIG_PCI_IOV))) {
2131                 dev_warn(&pdev->dev, "Can not config SRIOV\n");
2132                 return -EINVAL;
2133         }
2134
2135         if (num_vfs) {
2136                 ret = pci_enable_sriov(pdev, num_vfs);
2137                 if (ret)
2138                         dev_err(&pdev->dev, "SRIOV enable failed %d\n", ret);
2139                 else
2140                         return num_vfs;
2141         } else if (!pci_vfs_assigned(pdev)) {
2142                 pci_disable_sriov(pdev);
2143         } else {
2144                 dev_warn(&pdev->dev,
2145                          "Unable to free VFs because some are assigned to VMs.\n");
2146         }
2147
2148         return 0;
2149 }
2150
2151 static void hns3_shutdown(struct pci_dev *pdev)
2152 {
2153         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2154
2155         hnae3_unregister_ae_dev(ae_dev);
2156         pci_set_drvdata(pdev, NULL);
2157
2158         if (system_state == SYSTEM_POWER_OFF)
2159                 pci_set_power_state(pdev, PCI_D3hot);
2160 }
2161
2162 static pci_ers_result_t hns3_error_detected(struct pci_dev *pdev,
2163                                             pci_channel_state_t state)
2164 {
2165         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2166         pci_ers_result_t ret;
2167
2168         dev_info(&pdev->dev, "PCI error detected, state(=%d)!!\n", state);
2169
2170         if (state == pci_channel_io_perm_failure)
2171                 return PCI_ERS_RESULT_DISCONNECT;
2172
2173         if (!ae_dev || !ae_dev->ops) {
2174                 dev_err(&pdev->dev,
2175                         "Can't recover - error happened before device initialized\n");
2176                 return PCI_ERS_RESULT_NONE;
2177         }
2178
2179         if (ae_dev->ops->handle_hw_ras_error)
2180                 ret = ae_dev->ops->handle_hw_ras_error(ae_dev);
2181         else
2182                 return PCI_ERS_RESULT_NONE;
2183
2184         return ret;
2185 }
2186
2187 static pci_ers_result_t hns3_slot_reset(struct pci_dev *pdev)
2188 {
2189         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2190         const struct hnae3_ae_ops *ops;
2191         enum hnae3_reset_type reset_type;
2192         struct device *dev = &pdev->dev;
2193
2194         if (!ae_dev || !ae_dev->ops)
2195                 return PCI_ERS_RESULT_NONE;
2196
2197         ops = ae_dev->ops;
2198         /* request the reset */
2199         if (ops->reset_event && ops->get_reset_level &&
2200             ops->set_default_reset_request) {
2201                 if (ae_dev->hw_err_reset_req) {
2202                         reset_type = ops->get_reset_level(ae_dev,
2203                                                 &ae_dev->hw_err_reset_req);
2204                         ops->set_default_reset_request(ae_dev, reset_type);
2205                         dev_info(dev, "requesting reset due to PCI error\n");
2206                         ops->reset_event(pdev, NULL);
2207                 }
2208
2209                 return PCI_ERS_RESULT_RECOVERED;
2210         }
2211
2212         return PCI_ERS_RESULT_DISCONNECT;
2213 }
2214
2215 static void hns3_reset_prepare(struct pci_dev *pdev)
2216 {
2217         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2218
2219         dev_info(&pdev->dev, "FLR prepare\n");
2220         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_prepare)
2221                 ae_dev->ops->flr_prepare(ae_dev);
2222 }
2223
2224 static void hns3_reset_done(struct pci_dev *pdev)
2225 {
2226         struct hnae3_ae_dev *ae_dev = pci_get_drvdata(pdev);
2227
2228         dev_info(&pdev->dev, "FLR done\n");
2229         if (ae_dev && ae_dev->ops && ae_dev->ops->flr_done)
2230                 ae_dev->ops->flr_done(ae_dev);
2231 }
2232
2233 static const struct pci_error_handlers hns3_err_handler = {
2234         .error_detected = hns3_error_detected,
2235         .slot_reset     = hns3_slot_reset,
2236         .reset_prepare  = hns3_reset_prepare,
2237         .reset_done     = hns3_reset_done,
2238 };
2239
2240 static struct pci_driver hns3_driver = {
2241         .name     = hns3_driver_name,
2242         .id_table = hns3_pci_tbl,
2243         .probe    = hns3_probe,
2244         .remove   = hns3_remove,
2245         .shutdown = hns3_shutdown,
2246         .sriov_configure = hns3_pci_sriov_configure,
2247         .err_handler    = &hns3_err_handler,
2248 };
2249
2250 /* set default feature to hns3 */
2251 static void hns3_set_default_feature(struct net_device *netdev)
2252 {
2253         struct hnae3_handle *h = hns3_get_handle(netdev);
2254         struct pci_dev *pdev = h->pdev;
2255
2256         netdev->priv_flags |= IFF_UNICAST_FLT;
2257
2258         netdev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2259                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2260                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2261                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2262                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2263                 NETIF_F_TSO_MANGLEID | NETIF_F_FRAGLIST;
2264
2265         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2266
2267         netdev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2268                 NETIF_F_HW_VLAN_CTAG_FILTER |
2269                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2270                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2271                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2272                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2273                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2274                 NETIF_F_FRAGLIST;
2275
2276         netdev->vlan_features |=
2277                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM |
2278                 NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO |
2279                 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2280                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2281                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2282                 NETIF_F_FRAGLIST;
2283
2284         netdev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2285                 NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
2286                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2287                 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_GSO_GRE |
2288                 NETIF_F_GSO_GRE_CSUM | NETIF_F_GSO_UDP_TUNNEL |
2289                 NETIF_F_GSO_UDP_TUNNEL_CSUM | NETIF_F_SCTP_CRC |
2290                 NETIF_F_FRAGLIST;
2291
2292         if (pdev->revision >= 0x21) {
2293                 netdev->hw_features |= NETIF_F_GRO_HW;
2294                 netdev->features |= NETIF_F_GRO_HW;
2295
2296                 if (!(h->flags & HNAE3_SUPPORT_VF)) {
2297                         netdev->hw_features |= NETIF_F_NTUPLE;
2298                         netdev->features |= NETIF_F_NTUPLE;
2299                 }
2300         }
2301 }
2302
2303 static int hns3_alloc_buffer(struct hns3_enet_ring *ring,
2304                              struct hns3_desc_cb *cb)
2305 {
2306         unsigned int order = hns3_page_order(ring);
2307         struct page *p;
2308
2309         p = dev_alloc_pages(order);
2310         if (!p)
2311                 return -ENOMEM;
2312
2313         cb->priv = p;
2314         cb->page_offset = 0;
2315         cb->reuse_flag = 0;
2316         cb->buf  = page_address(p);
2317         cb->length = hns3_page_size(ring);
2318         cb->type = DESC_TYPE_PAGE;
2319
2320         return 0;
2321 }
2322
2323 static void hns3_free_buffer(struct hns3_enet_ring *ring,
2324                              struct hns3_desc_cb *cb)
2325 {
2326         if (cb->type == DESC_TYPE_SKB)
2327                 dev_kfree_skb_any((struct sk_buff *)cb->priv);
2328         else if (!HNAE3_IS_TX_RING(ring))
2329                 put_page((struct page *)cb->priv);
2330         memset(cb, 0, sizeof(*cb));
2331 }
2332
2333 static int hns3_map_buffer(struct hns3_enet_ring *ring, struct hns3_desc_cb *cb)
2334 {
2335         cb->dma = dma_map_page(ring_to_dev(ring), cb->priv, 0,
2336                                cb->length, ring_to_dma_dir(ring));
2337
2338         if (unlikely(dma_mapping_error(ring_to_dev(ring), cb->dma)))
2339                 return -EIO;
2340
2341         return 0;
2342 }
2343
2344 static void hns3_unmap_buffer(struct hns3_enet_ring *ring,
2345                               struct hns3_desc_cb *cb)
2346 {
2347         if (cb->type == DESC_TYPE_SKB || cb->type == DESC_TYPE_FRAGLIST_SKB)
2348                 dma_unmap_single(ring_to_dev(ring), cb->dma, cb->length,
2349                                  ring_to_dma_dir(ring));
2350         else if (cb->length)
2351                 dma_unmap_page(ring_to_dev(ring), cb->dma, cb->length,
2352                                ring_to_dma_dir(ring));
2353 }
2354
2355 static void hns3_buffer_detach(struct hns3_enet_ring *ring, int i)
2356 {
2357         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2358         ring->desc[i].addr = 0;
2359 }
2360
2361 static void hns3_free_buffer_detach(struct hns3_enet_ring *ring, int i)
2362 {
2363         struct hns3_desc_cb *cb = &ring->desc_cb[i];
2364
2365         if (!ring->desc_cb[i].dma)
2366                 return;
2367
2368         hns3_buffer_detach(ring, i);
2369         hns3_free_buffer(ring, cb);
2370 }
2371
2372 static void hns3_free_buffers(struct hns3_enet_ring *ring)
2373 {
2374         int i;
2375
2376         for (i = 0; i < ring->desc_num; i++)
2377                 hns3_free_buffer_detach(ring, i);
2378 }
2379
2380 /* free desc along with its attached buffer */
2381 static void hns3_free_desc(struct hns3_enet_ring *ring)
2382 {
2383         int size = ring->desc_num * sizeof(ring->desc[0]);
2384
2385         hns3_free_buffers(ring);
2386
2387         if (ring->desc) {
2388                 dma_free_coherent(ring_to_dev(ring), size,
2389                                   ring->desc, ring->desc_dma_addr);
2390                 ring->desc = NULL;
2391         }
2392 }
2393
2394 static int hns3_alloc_desc(struct hns3_enet_ring *ring)
2395 {
2396         int size = ring->desc_num * sizeof(ring->desc[0]);
2397
2398         ring->desc = dma_alloc_coherent(ring_to_dev(ring), size,
2399                                         &ring->desc_dma_addr, GFP_KERNEL);
2400         if (!ring->desc)
2401                 return -ENOMEM;
2402
2403         return 0;
2404 }
2405
2406 static int hns3_alloc_and_map_buffer(struct hns3_enet_ring *ring,
2407                                    struct hns3_desc_cb *cb)
2408 {
2409         int ret;
2410
2411         ret = hns3_alloc_buffer(ring, cb);
2412         if (ret)
2413                 goto out;
2414
2415         ret = hns3_map_buffer(ring, cb);
2416         if (ret)
2417                 goto out_with_buf;
2418
2419         return 0;
2420
2421 out_with_buf:
2422         hns3_free_buffer(ring, cb);
2423 out:
2424         return ret;
2425 }
2426
2427 static int hns3_alloc_and_attach_buffer(struct hns3_enet_ring *ring, int i)
2428 {
2429         int ret = hns3_alloc_and_map_buffer(ring, &ring->desc_cb[i]);
2430
2431         if (ret)
2432                 return ret;
2433
2434         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2435
2436         return 0;
2437 }
2438
2439 /* Allocate memory for raw pkg, and map with dma */
2440 static int hns3_alloc_ring_buffers(struct hns3_enet_ring *ring)
2441 {
2442         int i, j, ret;
2443
2444         for (i = 0; i < ring->desc_num; i++) {
2445                 ret = hns3_alloc_and_attach_buffer(ring, i);
2446                 if (ret)
2447                         goto out_buffer_fail;
2448         }
2449
2450         return 0;
2451
2452 out_buffer_fail:
2453         for (j = i - 1; j >= 0; j--)
2454                 hns3_free_buffer_detach(ring, j);
2455         return ret;
2456 }
2457
2458 /* detach a in-used buffer and replace with a reserved one */
2459 static void hns3_replace_buffer(struct hns3_enet_ring *ring, int i,
2460                                 struct hns3_desc_cb *res_cb)
2461 {
2462         hns3_unmap_buffer(ring, &ring->desc_cb[i]);
2463         ring->desc_cb[i] = *res_cb;
2464         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma);
2465         ring->desc[i].rx.bd_base_info = 0;
2466 }
2467
2468 static void hns3_reuse_buffer(struct hns3_enet_ring *ring, int i)
2469 {
2470         ring->desc_cb[i].reuse_flag = 0;
2471         ring->desc[i].addr = cpu_to_le64(ring->desc_cb[i].dma +
2472                                          ring->desc_cb[i].page_offset);
2473         ring->desc[i].rx.bd_base_info = 0;
2474
2475         dma_sync_single_for_device(ring_to_dev(ring),
2476                         ring->desc_cb[i].dma + ring->desc_cb[i].page_offset,
2477                         hns3_buf_size(ring),
2478                         DMA_FROM_DEVICE);
2479 }
2480
2481 static void hns3_nic_reclaim_desc(struct hns3_enet_ring *ring, int head,
2482                                   int *bytes, int *pkts)
2483 {
2484         int ntc = ring->next_to_clean;
2485         struct hns3_desc_cb *desc_cb;
2486
2487         while (head != ntc) {
2488                 desc_cb = &ring->desc_cb[ntc];
2489                 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
2490                 (*bytes) += desc_cb->length;
2491                 /* desc_cb will be cleaned, after hnae3_free_buffer_detach */
2492                 hns3_free_buffer_detach(ring, ntc);
2493
2494                 if (++ntc == ring->desc_num)
2495                         ntc = 0;
2496
2497                 /* Issue prefetch for next Tx descriptor */
2498                 prefetch(&ring->desc_cb[ntc]);
2499         }
2500
2501         /* This smp_store_release() pairs with smp_load_acquire() in
2502          * ring_space called by hns3_nic_net_xmit.
2503          */
2504         smp_store_release(&ring->next_to_clean, ntc);
2505 }
2506
2507 static int is_valid_clean_head(struct hns3_enet_ring *ring, int h)
2508 {
2509         int u = ring->next_to_use;
2510         int c = ring->next_to_clean;
2511
2512         if (unlikely(h > ring->desc_num))
2513                 return 0;
2514
2515         return u > c ? (h > c && h <= u) : (h > c || h <= u);
2516 }
2517
2518 void hns3_clean_tx_ring(struct hns3_enet_ring *ring)
2519 {
2520         struct net_device *netdev = ring_to_netdev(ring);
2521         struct hns3_nic_priv *priv = netdev_priv(netdev);
2522         struct netdev_queue *dev_queue;
2523         int bytes, pkts;
2524         int head;
2525
2526         head = readl_relaxed(ring->tqp->io_base + HNS3_RING_TX_RING_HEAD_REG);
2527
2528         if (is_ring_empty(ring) || head == ring->next_to_clean)
2529                 return; /* no data to poll */
2530
2531         rmb(); /* Make sure head is ready before touch any data */
2532
2533         if (unlikely(!is_valid_clean_head(ring, head))) {
2534                 hns3_rl_err(netdev, "wrong head (%d, %d-%d)\n", head,
2535                             ring->next_to_use, ring->next_to_clean);
2536
2537                 u64_stats_update_begin(&ring->syncp);
2538                 ring->stats.io_err_cnt++;
2539                 u64_stats_update_end(&ring->syncp);
2540                 return;
2541         }
2542
2543         bytes = 0;
2544         pkts = 0;
2545         hns3_nic_reclaim_desc(ring, head, &bytes, &pkts);
2546
2547         ring->tqp_vector->tx_group.total_bytes += bytes;
2548         ring->tqp_vector->tx_group.total_packets += pkts;
2549
2550         u64_stats_update_begin(&ring->syncp);
2551         ring->stats.tx_bytes += bytes;
2552         ring->stats.tx_pkts += pkts;
2553         u64_stats_update_end(&ring->syncp);
2554
2555         dev_queue = netdev_get_tx_queue(netdev, ring->tqp->tqp_index);
2556         netdev_tx_completed_queue(dev_queue, pkts, bytes);
2557
2558         if (unlikely(netif_carrier_ok(netdev) &&
2559                      ring_space(ring) > HNS3_MAX_TSO_BD_NUM)) {
2560                 /* Make sure that anybody stopping the queue after this
2561                  * sees the new next_to_clean.
2562                  */
2563                 smp_mb();
2564                 if (netif_tx_queue_stopped(dev_queue) &&
2565                     !test_bit(HNS3_NIC_STATE_DOWN, &priv->state)) {
2566                         netif_tx_wake_queue(dev_queue);
2567                         ring->stats.restart_queue++;
2568                 }
2569         }
2570 }
2571
2572 static int hns3_desc_unused(struct hns3_enet_ring *ring)
2573 {
2574         int ntc = ring->next_to_clean;
2575         int ntu = ring->next_to_use;
2576
2577         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
2578 }
2579
2580 static void hns3_nic_alloc_rx_buffers(struct hns3_enet_ring *ring,
2581                                       int cleand_count)
2582 {
2583         struct hns3_desc_cb *desc_cb;
2584         struct hns3_desc_cb res_cbs;
2585         int i, ret;
2586
2587         for (i = 0; i < cleand_count; i++) {
2588                 desc_cb = &ring->desc_cb[ring->next_to_use];
2589                 if (desc_cb->reuse_flag) {
2590                         u64_stats_update_begin(&ring->syncp);
2591                         ring->stats.reuse_pg_cnt++;
2592                         u64_stats_update_end(&ring->syncp);
2593
2594                         hns3_reuse_buffer(ring, ring->next_to_use);
2595                 } else {
2596                         ret = hns3_alloc_and_map_buffer(ring, &res_cbs);
2597                         if (ret) {
2598                                 u64_stats_update_begin(&ring->syncp);
2599                                 ring->stats.sw_err_cnt++;
2600                                 u64_stats_update_end(&ring->syncp);
2601
2602                                 hns3_rl_err(ring_to_netdev(ring),
2603                                             "alloc rx buffer failed: %d\n",
2604                                             ret);
2605                                 break;
2606                         }
2607                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
2608
2609                         u64_stats_update_begin(&ring->syncp);
2610                         ring->stats.non_reuse_pg++;
2611                         u64_stats_update_end(&ring->syncp);
2612                 }
2613
2614                 ring_ptr_move_fw(ring, next_to_use);
2615         }
2616
2617         wmb(); /* Make all data has been write before submit */
2618         writel_relaxed(i, ring->tqp->io_base + HNS3_RING_RX_RING_HEAD_REG);
2619 }
2620
2621 static bool hns3_page_is_reusable(struct page *page)
2622 {
2623         return page_to_nid(page) == numa_mem_id() &&
2624                 !page_is_pfmemalloc(page);
2625 }
2626
2627 static void hns3_nic_reuse_page(struct sk_buff *skb, int i,
2628                                 struct hns3_enet_ring *ring, int pull_len,
2629                                 struct hns3_desc_cb *desc_cb)
2630 {
2631         struct hns3_desc *desc = &ring->desc[ring->next_to_clean];
2632         int size = le16_to_cpu(desc->rx.size);
2633         u32 truesize = hns3_buf_size(ring);
2634
2635         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
2636                         size - pull_len, truesize);
2637
2638         /* Avoid re-using remote pages, or the stack is still using the page
2639          * when page_offset rollback to zero, flag default unreuse
2640          */
2641         if (unlikely(!hns3_page_is_reusable(desc_cb->priv)) ||
2642             (!desc_cb->page_offset && page_count(desc_cb->priv) > 1))
2643                 return;
2644
2645         /* Move offset up to the next cache line */
2646         desc_cb->page_offset += truesize;
2647
2648         if (desc_cb->page_offset + truesize <= hns3_page_size(ring)) {
2649                 desc_cb->reuse_flag = 1;
2650                 /* Bump ref count on page before it is given */
2651                 get_page(desc_cb->priv);
2652         } else if (page_count(desc_cb->priv) == 1) {
2653                 desc_cb->reuse_flag = 1;
2654                 desc_cb->page_offset = 0;
2655                 get_page(desc_cb->priv);
2656         }
2657 }
2658
2659 static int hns3_gro_complete(struct sk_buff *skb, u32 l234info)
2660 {
2661         __be16 type = skb->protocol;
2662         struct tcphdr *th;
2663         int depth = 0;
2664
2665         while (eth_type_vlan(type)) {
2666                 struct vlan_hdr *vh;
2667
2668                 if ((depth + VLAN_HLEN) > skb_headlen(skb))
2669                         return -EFAULT;
2670
2671                 vh = (struct vlan_hdr *)(skb->data + depth);
2672                 type = vh->h_vlan_encapsulated_proto;
2673                 depth += VLAN_HLEN;
2674         }
2675
2676         skb_set_network_header(skb, depth);
2677
2678         if (type == htons(ETH_P_IP)) {
2679                 const struct iphdr *iph = ip_hdr(skb);
2680
2681                 depth += sizeof(struct iphdr);
2682                 skb_set_transport_header(skb, depth);
2683                 th = tcp_hdr(skb);
2684                 th->check = ~tcp_v4_check(skb->len - depth, iph->saddr,
2685                                           iph->daddr, 0);
2686         } else if (type == htons(ETH_P_IPV6)) {
2687                 const struct ipv6hdr *iph = ipv6_hdr(skb);
2688
2689                 depth += sizeof(struct ipv6hdr);
2690                 skb_set_transport_header(skb, depth);
2691                 th = tcp_hdr(skb);
2692                 th->check = ~tcp_v6_check(skb->len - depth, &iph->saddr,
2693                                           &iph->daddr, 0);
2694         } else {
2695                 hns3_rl_err(skb->dev,
2696                             "Error: FW GRO supports only IPv4/IPv6, not 0x%04x, depth: %d\n",
2697                             be16_to_cpu(type), depth);
2698                 return -EFAULT;
2699         }
2700
2701         skb_shinfo(skb)->gso_segs = NAPI_GRO_CB(skb)->count;
2702         if (th->cwr)
2703                 skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_ECN;
2704
2705         if (l234info & BIT(HNS3_RXD_GRO_FIXID_B))
2706                 skb_shinfo(skb)->gso_type |= SKB_GSO_TCP_FIXEDID;
2707
2708         skb->csum_start = (unsigned char *)th - skb->head;
2709         skb->csum_offset = offsetof(struct tcphdr, check);
2710         skb->ip_summed = CHECKSUM_PARTIAL;
2711
2712         trace_hns3_gro(skb);
2713
2714         return 0;
2715 }
2716
2717 static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
2718                              u32 l234info, u32 bd_base_info, u32 ol_info)
2719 {
2720         struct net_device *netdev = ring_to_netdev(ring);
2721         int l3_type, l4_type;
2722         int ol4_type;
2723
2724         skb->ip_summed = CHECKSUM_NONE;
2725
2726         skb_checksum_none_assert(skb);
2727
2728         if (!(netdev->features & NETIF_F_RXCSUM))
2729                 return;
2730
2731         /* check if hardware has done checksum */
2732         if (!(bd_base_info & BIT(HNS3_RXD_L3L4P_B)))
2733                 return;
2734
2735         if (unlikely(l234info & (BIT(HNS3_RXD_L3E_B) | BIT(HNS3_RXD_L4E_B) |
2736                                  BIT(HNS3_RXD_OL3E_B) |
2737                                  BIT(HNS3_RXD_OL4E_B)))) {
2738                 u64_stats_update_begin(&ring->syncp);
2739                 ring->stats.l3l4_csum_err++;
2740                 u64_stats_update_end(&ring->syncp);
2741
2742                 return;
2743         }
2744
2745         ol4_type = hnae3_get_field(ol_info, HNS3_RXD_OL4ID_M,
2746                                    HNS3_RXD_OL4ID_S);
2747         switch (ol4_type) {
2748         case HNS3_OL4_TYPE_MAC_IN_UDP:
2749         case HNS3_OL4_TYPE_NVGRE:
2750                 skb->csum_level = 1;
2751                 fallthrough;
2752         case HNS3_OL4_TYPE_NO_TUN:
2753                 l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
2754                                           HNS3_RXD_L3ID_S);
2755                 l4_type = hnae3_get_field(l234info, HNS3_RXD_L4ID_M,
2756                                           HNS3_RXD_L4ID_S);
2757
2758                 /* Can checksum ipv4 or ipv6 + UDP/TCP/SCTP packets */
2759                 if ((l3_type == HNS3_L3_TYPE_IPV4 ||
2760                      l3_type == HNS3_L3_TYPE_IPV6) &&
2761                     (l4_type == HNS3_L4_TYPE_UDP ||
2762                      l4_type == HNS3_L4_TYPE_TCP ||
2763                      l4_type == HNS3_L4_TYPE_SCTP))
2764                         skb->ip_summed = CHECKSUM_UNNECESSARY;
2765                 break;
2766         default:
2767                 break;
2768         }
2769 }
2770
2771 static void hns3_rx_skb(struct hns3_enet_ring *ring, struct sk_buff *skb)
2772 {
2773         if (skb_has_frag_list(skb))
2774                 napi_gro_flush(&ring->tqp_vector->napi, false);
2775
2776         napi_gro_receive(&ring->tqp_vector->napi, skb);
2777 }
2778
2779 static bool hns3_parse_vlan_tag(struct hns3_enet_ring *ring,
2780                                 struct hns3_desc *desc, u32 l234info,
2781                                 u16 *vlan_tag)
2782 {
2783         struct hnae3_handle *handle = ring->tqp->handle;
2784         struct pci_dev *pdev = ring->tqp->handle->pdev;
2785
2786         if (pdev->revision == 0x20) {
2787                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2788                 if (!(*vlan_tag & VLAN_VID_MASK))
2789                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2790
2791                 return (*vlan_tag != 0);
2792         }
2793
2794 #define HNS3_STRP_OUTER_VLAN    0x1
2795 #define HNS3_STRP_INNER_VLAN    0x2
2796 #define HNS3_STRP_BOTH          0x3
2797
2798         /* Hardware always insert VLAN tag into RX descriptor when
2799          * remove the tag from packet, driver needs to determine
2800          * reporting which tag to stack.
2801          */
2802         switch (hnae3_get_field(l234info, HNS3_RXD_STRP_TAGP_M,
2803                                 HNS3_RXD_STRP_TAGP_S)) {
2804         case HNS3_STRP_OUTER_VLAN:
2805                 if (handle->port_base_vlan_state !=
2806                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2807                         return false;
2808
2809                 *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2810                 return true;
2811         case HNS3_STRP_INNER_VLAN:
2812                 if (handle->port_base_vlan_state !=
2813                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2814                         return false;
2815
2816                 *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2817                 return true;
2818         case HNS3_STRP_BOTH:
2819                 if (handle->port_base_vlan_state ==
2820                                 HNAE3_PORT_BASE_VLAN_DISABLE)
2821                         *vlan_tag = le16_to_cpu(desc->rx.ot_vlan_tag);
2822                 else
2823                         *vlan_tag = le16_to_cpu(desc->rx.vlan_tag);
2824
2825                 return true;
2826         default:
2827                 return false;
2828         }
2829 }
2830
2831 static int hns3_alloc_skb(struct hns3_enet_ring *ring, unsigned int length,
2832                           unsigned char *va)
2833 {
2834         struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
2835         struct net_device *netdev = ring_to_netdev(ring);
2836         struct sk_buff *skb;
2837
2838         ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
2839         skb = ring->skb;
2840         if (unlikely(!skb)) {
2841                 hns3_rl_err(netdev, "alloc rx skb fail\n");
2842
2843                 u64_stats_update_begin(&ring->syncp);
2844                 ring->stats.sw_err_cnt++;
2845                 u64_stats_update_end(&ring->syncp);
2846
2847                 return -ENOMEM;
2848         }
2849
2850         trace_hns3_rx_desc(ring);
2851         prefetchw(skb->data);
2852
2853         ring->pending_buf = 1;
2854         ring->frag_num = 0;
2855         ring->tail_skb = NULL;
2856         if (length <= HNS3_RX_HEAD_SIZE) {
2857                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
2858
2859                 /* We can reuse buffer as-is, just make sure it is local */
2860                 if (likely(hns3_page_is_reusable(desc_cb->priv)))
2861                         desc_cb->reuse_flag = 1;
2862                 else /* This page cannot be reused so discard it */
2863                         put_page(desc_cb->priv);
2864
2865                 ring_ptr_move_fw(ring, next_to_clean);
2866                 return 0;
2867         }
2868         u64_stats_update_begin(&ring->syncp);
2869         ring->stats.seg_pkt_cnt++;
2870         u64_stats_update_end(&ring->syncp);
2871
2872         ring->pull_len = eth_get_headlen(netdev, va, HNS3_RX_HEAD_SIZE);
2873         __skb_put(skb, ring->pull_len);
2874         hns3_nic_reuse_page(skb, ring->frag_num++, ring, ring->pull_len,
2875                             desc_cb);
2876         ring_ptr_move_fw(ring, next_to_clean);
2877
2878         return 0;
2879 }
2880
2881 static int hns3_add_frag(struct hns3_enet_ring *ring)
2882 {
2883         struct sk_buff *skb = ring->skb;
2884         struct sk_buff *head_skb = skb;
2885         struct sk_buff *new_skb;
2886         struct hns3_desc_cb *desc_cb;
2887         struct hns3_desc *desc;
2888         u32 bd_base_info;
2889
2890         do {
2891                 desc = &ring->desc[ring->next_to_clean];
2892                 desc_cb = &ring->desc_cb[ring->next_to_clean];
2893                 bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2894                 /* make sure HW write desc complete */
2895                 dma_rmb();
2896                 if (!(bd_base_info & BIT(HNS3_RXD_VLD_B)))
2897                         return -ENXIO;
2898
2899                 if (unlikely(ring->frag_num >= MAX_SKB_FRAGS)) {
2900                         new_skb = napi_alloc_skb(&ring->tqp_vector->napi, 0);
2901                         if (unlikely(!new_skb)) {
2902                                 hns3_rl_err(ring_to_netdev(ring),
2903                                             "alloc rx fraglist skb fail\n");
2904                                 return -ENXIO;
2905                         }
2906                         ring->frag_num = 0;
2907
2908                         if (ring->tail_skb) {
2909                                 ring->tail_skb->next = new_skb;
2910                                 ring->tail_skb = new_skb;
2911                         } else {
2912                                 skb_shinfo(skb)->frag_list = new_skb;
2913                                 ring->tail_skb = new_skb;
2914                         }
2915                 }
2916
2917                 if (ring->tail_skb) {
2918                         head_skb->truesize += hns3_buf_size(ring);
2919                         head_skb->data_len += le16_to_cpu(desc->rx.size);
2920                         head_skb->len += le16_to_cpu(desc->rx.size);
2921                         skb = ring->tail_skb;
2922                 }
2923
2924                 dma_sync_single_for_cpu(ring_to_dev(ring),
2925                                 desc_cb->dma + desc_cb->page_offset,
2926                                 hns3_buf_size(ring),
2927                                 DMA_FROM_DEVICE);
2928
2929                 hns3_nic_reuse_page(skb, ring->frag_num++, ring, 0, desc_cb);
2930                 trace_hns3_rx_desc(ring);
2931                 ring_ptr_move_fw(ring, next_to_clean);
2932                 ring->pending_buf++;
2933         } while (!(bd_base_info & BIT(HNS3_RXD_FE_B)));
2934
2935         return 0;
2936 }
2937
2938 static int hns3_set_gro_and_checksum(struct hns3_enet_ring *ring,
2939                                      struct sk_buff *skb, u32 l234info,
2940                                      u32 bd_base_info, u32 ol_info)
2941 {
2942         u32 l3_type;
2943
2944         skb_shinfo(skb)->gso_size = hnae3_get_field(bd_base_info,
2945                                                     HNS3_RXD_GRO_SIZE_M,
2946                                                     HNS3_RXD_GRO_SIZE_S);
2947         /* if there is no HW GRO, do not set gro params */
2948         if (!skb_shinfo(skb)->gso_size) {
2949                 hns3_rx_checksum(ring, skb, l234info, bd_base_info, ol_info);
2950                 return 0;
2951         }
2952
2953         NAPI_GRO_CB(skb)->count = hnae3_get_field(l234info,
2954                                                   HNS3_RXD_GRO_COUNT_M,
2955                                                   HNS3_RXD_GRO_COUNT_S);
2956
2957         l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M, HNS3_RXD_L3ID_S);
2958         if (l3_type == HNS3_L3_TYPE_IPV4)
2959                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
2960         else if (l3_type == HNS3_L3_TYPE_IPV6)
2961                 skb_shinfo(skb)->gso_type = SKB_GSO_TCPV6;
2962         else
2963                 return -EFAULT;
2964
2965         return  hns3_gro_complete(skb, l234info);
2966 }
2967
2968 static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
2969                                      struct sk_buff *skb, u32 rss_hash)
2970 {
2971         struct hnae3_handle *handle = ring->tqp->handle;
2972         enum pkt_hash_types rss_type;
2973
2974         if (rss_hash)
2975                 rss_type = handle->kinfo.rss_type;
2976         else
2977                 rss_type = PKT_HASH_TYPE_NONE;
2978
2979         skb_set_hash(skb, rss_hash, rss_type);
2980 }
2981
2982 static int hns3_handle_bdinfo(struct hns3_enet_ring *ring, struct sk_buff *skb)
2983 {
2984         struct net_device *netdev = ring_to_netdev(ring);
2985         enum hns3_pkt_l2t_type l2_frame_type;
2986         u32 bd_base_info, l234info, ol_info;
2987         struct hns3_desc *desc;
2988         unsigned int len;
2989         int pre_ntc, ret;
2990
2991         /* bdinfo handled below is only valid on the last BD of the
2992          * current packet, and ring->next_to_clean indicates the first
2993          * descriptor of next packet, so need - 1 below.
2994          */
2995         pre_ntc = ring->next_to_clean ? (ring->next_to_clean - 1) :
2996                                         (ring->desc_num - 1);
2997         desc = &ring->desc[pre_ntc];
2998         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
2999         l234info = le32_to_cpu(desc->rx.l234_info);
3000         ol_info = le32_to_cpu(desc->rx.ol_info);
3001
3002         /* Based on hw strategy, the tag offloaded will be stored at
3003          * ot_vlan_tag in two layer tag case, and stored at vlan_tag
3004          * in one layer tag case.
3005          */
3006         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX) {
3007                 u16 vlan_tag;
3008
3009                 if (hns3_parse_vlan_tag(ring, desc, l234info, &vlan_tag))
3010                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
3011                                                vlan_tag);
3012         }
3013
3014         if (unlikely(!desc->rx.pkt_len || (l234info & (BIT(HNS3_RXD_TRUNCAT_B) |
3015                                   BIT(HNS3_RXD_L2E_B))))) {
3016                 u64_stats_update_begin(&ring->syncp);
3017                 if (l234info & BIT(HNS3_RXD_L2E_B))
3018                         ring->stats.l2_err++;
3019                 else
3020                         ring->stats.err_pkt_len++;
3021                 u64_stats_update_end(&ring->syncp);
3022
3023                 return -EFAULT;
3024         }
3025
3026         len = skb->len;
3027
3028         /* Do update ip stack process */
3029         skb->protocol = eth_type_trans(skb, netdev);
3030
3031         /* This is needed in order to enable forwarding support */
3032         ret = hns3_set_gro_and_checksum(ring, skb, l234info,
3033                                         bd_base_info, ol_info);
3034         if (unlikely(ret)) {
3035                 u64_stats_update_begin(&ring->syncp);
3036                 ring->stats.rx_err_cnt++;
3037                 u64_stats_update_end(&ring->syncp);
3038                 return ret;
3039         }
3040
3041         l2_frame_type = hnae3_get_field(l234info, HNS3_RXD_DMAC_M,
3042                                         HNS3_RXD_DMAC_S);
3043
3044         u64_stats_update_begin(&ring->syncp);
3045         ring->stats.rx_pkts++;
3046         ring->stats.rx_bytes += len;
3047
3048         if (l2_frame_type == HNS3_L2_TYPE_MULTICAST)
3049                 ring->stats.rx_multicast++;
3050
3051         u64_stats_update_end(&ring->syncp);
3052
3053         ring->tqp_vector->rx_group.total_bytes += len;
3054
3055         hns3_set_rx_skb_rss_type(ring, skb, le32_to_cpu(desc->rx.rss_hash));
3056         return 0;
3057 }
3058
3059 static int hns3_handle_rx_bd(struct hns3_enet_ring *ring)
3060 {
3061         struct sk_buff *skb = ring->skb;
3062         struct hns3_desc_cb *desc_cb;
3063         struct hns3_desc *desc;
3064         unsigned int length;
3065         u32 bd_base_info;
3066         int ret;
3067
3068         desc = &ring->desc[ring->next_to_clean];
3069         desc_cb = &ring->desc_cb[ring->next_to_clean];
3070
3071         prefetch(desc);
3072
3073         length = le16_to_cpu(desc->rx.size);
3074         bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
3075
3076         /* Check valid BD */
3077         if (unlikely(!(bd_base_info & BIT(HNS3_RXD_VLD_B))))
3078                 return -ENXIO;
3079
3080         if (!skb) {
3081                 ring->va = desc_cb->buf + desc_cb->page_offset;
3082
3083                 dma_sync_single_for_cpu(ring_to_dev(ring),
3084                                 desc_cb->dma + desc_cb->page_offset,
3085                                 hns3_buf_size(ring),
3086                                 DMA_FROM_DEVICE);
3087         }
3088
3089         /* Prefetch first cache line of first page
3090          * Idea is to cache few bytes of the header of the packet. Our L1 Cache
3091          * line size is 64B so need to prefetch twice to make it 128B. But in
3092          * actual we can have greater size of caches with 128B Level 1 cache
3093          * lines. In such a case, single fetch would suffice to cache in the
3094          * relevant part of the header.
3095          */
3096         prefetch(ring->va);
3097 #if L1_CACHE_BYTES < 128
3098         prefetch(ring->va + L1_CACHE_BYTES);
3099 #endif
3100
3101         if (!skb) {
3102                 ret = hns3_alloc_skb(ring, length, ring->va);
3103                 skb = ring->skb;
3104
3105                 if (ret < 0) /* alloc buffer fail */
3106                         return ret;
3107                 if (!(bd_base_info & BIT(HNS3_RXD_FE_B))) { /* need add frag */
3108                         ret = hns3_add_frag(ring);
3109                         if (ret)
3110                                 return ret;
3111                 }
3112         } else {
3113                 ret = hns3_add_frag(ring);
3114                 if (ret)
3115                         return ret;
3116         }
3117
3118         /* As the head data may be changed when GRO enable, copy
3119          * the head data in after other data rx completed
3120          */
3121         if (skb->len > HNS3_RX_HEAD_SIZE)
3122                 memcpy(skb->data, ring->va,
3123                        ALIGN(ring->pull_len, sizeof(long)));
3124
3125         ret = hns3_handle_bdinfo(ring, skb);
3126         if (unlikely(ret)) {
3127                 dev_kfree_skb_any(skb);
3128                 return ret;
3129         }
3130
3131         skb_record_rx_queue(skb, ring->tqp->tqp_index);
3132         return 0;
3133 }
3134
3135 int hns3_clean_rx_ring(struct hns3_enet_ring *ring, int budget,
3136                        void (*rx_fn)(struct hns3_enet_ring *, struct sk_buff *))
3137 {
3138 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
3139         int unused_count = hns3_desc_unused(ring);
3140         int recv_pkts = 0;
3141         int recv_bds = 0;
3142         int err, num;
3143
3144         num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
3145         num -= unused_count;
3146         unused_count -= ring->pending_buf;
3147
3148         if (num <= 0)
3149                 goto out;
3150
3151         rmb(); /* Make sure num taken effect before the other data is touched */
3152
3153         while (recv_pkts < budget && recv_bds < num) {
3154                 /* Reuse or realloc buffers */
3155                 if (unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
3156                         hns3_nic_alloc_rx_buffers(ring, unused_count);
3157                         unused_count = hns3_desc_unused(ring) -
3158                                         ring->pending_buf;
3159                 }
3160
3161                 /* Poll one pkt */
3162                 err = hns3_handle_rx_bd(ring);
3163                 /* Do not get FE for the packet or failed to alloc skb */
3164                 if (unlikely(!ring->skb || err == -ENXIO)) {
3165                         goto out;
3166                 } else if (likely(!err)) {
3167                         rx_fn(ring, ring->skb);
3168                         recv_pkts++;
3169                 }
3170
3171                 recv_bds += ring->pending_buf;
3172                 unused_count += ring->pending_buf;
3173                 ring->skb = NULL;
3174                 ring->pending_buf = 0;
3175         }
3176
3177 out:
3178         /* Make all data has been write before submit */
3179         if (unused_count > 0)
3180                 hns3_nic_alloc_rx_buffers(ring, unused_count);
3181
3182         return recv_pkts;
3183 }
3184
3185 static bool hns3_get_new_flow_lvl(struct hns3_enet_ring_group *ring_group)
3186 {
3187 #define HNS3_RX_LOW_BYTE_RATE 10000
3188 #define HNS3_RX_MID_BYTE_RATE 20000
3189 #define HNS3_RX_ULTRA_PACKET_RATE 40
3190
3191         enum hns3_flow_level_range new_flow_level;
3192         struct hns3_enet_tqp_vector *tqp_vector;
3193         int packets_per_msecs, bytes_per_msecs;
3194         u32 time_passed_ms;
3195
3196         tqp_vector = ring_group->ring->tqp_vector;
3197         time_passed_ms =
3198                 jiffies_to_msecs(jiffies - tqp_vector->last_jiffies);
3199         if (!time_passed_ms)
3200                 return false;
3201
3202         do_div(ring_group->total_packets, time_passed_ms);
3203         packets_per_msecs = ring_group->total_packets;
3204
3205         do_div(ring_group->total_bytes, time_passed_ms);
3206         bytes_per_msecs = ring_group->total_bytes;
3207
3208         new_flow_level = ring_group->coal.flow_level;
3209
3210         /* Simple throttlerate management
3211          * 0-10MB/s   lower     (50000 ints/s)
3212          * 10-20MB/s   middle    (20000 ints/s)
3213          * 20-1249MB/s high      (18000 ints/s)
3214          * > 40000pps  ultra     (8000 ints/s)
3215          */
3216         switch (new_flow_level) {
3217         case HNS3_FLOW_LOW:
3218                 if (bytes_per_msecs > HNS3_RX_LOW_BYTE_RATE)
3219                         new_flow_level = HNS3_FLOW_MID;
3220                 break;
3221         case HNS3_FLOW_MID:
3222                 if (bytes_per_msecs > HNS3_RX_MID_BYTE_RATE)
3223                         new_flow_level = HNS3_FLOW_HIGH;
3224                 else if (bytes_per_msecs <= HNS3_RX_LOW_BYTE_RATE)
3225                         new_flow_level = HNS3_FLOW_LOW;
3226                 break;
3227         case HNS3_FLOW_HIGH:
3228         case HNS3_FLOW_ULTRA:
3229         default:
3230                 if (bytes_per_msecs <= HNS3_RX_MID_BYTE_RATE)
3231                         new_flow_level = HNS3_FLOW_MID;
3232                 break;
3233         }
3234
3235         if (packets_per_msecs > HNS3_RX_ULTRA_PACKET_RATE &&
3236             &tqp_vector->rx_group == ring_group)
3237                 new_flow_level = HNS3_FLOW_ULTRA;
3238
3239         ring_group->total_bytes = 0;
3240         ring_group->total_packets = 0;
3241         ring_group->coal.flow_level = new_flow_level;
3242
3243         return true;
3244 }
3245
3246 static bool hns3_get_new_int_gl(struct hns3_enet_ring_group *ring_group)
3247 {
3248         struct hns3_enet_tqp_vector *tqp_vector;
3249         u16 new_int_gl;
3250
3251         if (!ring_group->ring)
3252                 return false;
3253
3254         tqp_vector = ring_group->ring->tqp_vector;
3255         if (!tqp_vector->last_jiffies)
3256                 return false;
3257
3258         if (ring_group->total_packets == 0) {
3259                 ring_group->coal.int_gl = HNS3_INT_GL_50K;
3260                 ring_group->coal.flow_level = HNS3_FLOW_LOW;
3261                 return true;
3262         }
3263
3264         if (!hns3_get_new_flow_lvl(ring_group))
3265                 return false;
3266
3267         new_int_gl = ring_group->coal.int_gl;
3268         switch (ring_group->coal.flow_level) {
3269         case HNS3_FLOW_LOW:
3270                 new_int_gl = HNS3_INT_GL_50K;
3271                 break;
3272         case HNS3_FLOW_MID:
3273                 new_int_gl = HNS3_INT_GL_20K;
3274                 break;
3275         case HNS3_FLOW_HIGH:
3276                 new_int_gl = HNS3_INT_GL_18K;
3277                 break;
3278         case HNS3_FLOW_ULTRA:
3279                 new_int_gl = HNS3_INT_GL_8K;
3280                 break;
3281         default:
3282                 break;
3283         }
3284
3285         if (new_int_gl != ring_group->coal.int_gl) {
3286                 ring_group->coal.int_gl = new_int_gl;
3287                 return true;
3288         }
3289         return false;
3290 }
3291
3292 static void hns3_update_new_int_gl(struct hns3_enet_tqp_vector *tqp_vector)
3293 {
3294         struct hns3_enet_ring_group *rx_group = &tqp_vector->rx_group;
3295         struct hns3_enet_ring_group *tx_group = &tqp_vector->tx_group;
3296         bool rx_update, tx_update;
3297
3298         /* update param every 1000ms */
3299         if (time_before(jiffies,
3300                         tqp_vector->last_jiffies + msecs_to_jiffies(1000)))
3301                 return;
3302
3303         if (rx_group->coal.gl_adapt_enable) {
3304                 rx_update = hns3_get_new_int_gl(rx_group);
3305                 if (rx_update)
3306                         hns3_set_vector_coalesce_rx_gl(tqp_vector,
3307                                                        rx_group->coal.int_gl);
3308         }
3309
3310         if (tx_group->coal.gl_adapt_enable) {
3311                 tx_update = hns3_get_new_int_gl(tx_group);
3312                 if (tx_update)
3313                         hns3_set_vector_coalesce_tx_gl(tqp_vector,
3314                                                        tx_group->coal.int_gl);
3315         }
3316
3317         tqp_vector->last_jiffies = jiffies;
3318 }
3319
3320 static int hns3_nic_common_poll(struct napi_struct *napi, int budget)
3321 {
3322         struct hns3_nic_priv *priv = netdev_priv(napi->dev);
3323         struct hns3_enet_ring *ring;
3324         int rx_pkt_total = 0;
3325
3326         struct hns3_enet_tqp_vector *tqp_vector =
3327                 container_of(napi, struct hns3_enet_tqp_vector, napi);
3328         bool clean_complete = true;
3329         int rx_budget = budget;
3330
3331         if (unlikely(test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
3332                 napi_complete(napi);
3333                 return 0;
3334         }
3335
3336         /* Since the actual Tx work is minimal, we can give the Tx a larger
3337          * budget and be more aggressive about cleaning up the Tx descriptors.
3338          */
3339         hns3_for_each_ring(ring, tqp_vector->tx_group)
3340                 hns3_clean_tx_ring(ring);
3341
3342         /* make sure rx ring budget not smaller than 1 */
3343         if (tqp_vector->num_tqps > 1)
3344                 rx_budget = max(budget / tqp_vector->num_tqps, 1);
3345
3346         hns3_for_each_ring(ring, tqp_vector->rx_group) {
3347                 int rx_cleaned = hns3_clean_rx_ring(ring, rx_budget,
3348                                                     hns3_rx_skb);
3349
3350                 if (rx_cleaned >= rx_budget)
3351                         clean_complete = false;
3352
3353                 rx_pkt_total += rx_cleaned;
3354         }
3355
3356         tqp_vector->rx_group.total_packets += rx_pkt_total;
3357
3358         if (!clean_complete)
3359                 return budget;
3360
3361         if (napi_complete(napi) &&
3362             likely(!test_bit(HNS3_NIC_STATE_DOWN, &priv->state))) {
3363                 hns3_update_new_int_gl(tqp_vector);
3364                 hns3_mask_vector_irq(tqp_vector, 1);
3365         }
3366
3367         return rx_pkt_total;
3368 }
3369
3370 static int hns3_get_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3371                                       struct hnae3_ring_chain_node *head)
3372 {
3373         struct pci_dev *pdev = tqp_vector->handle->pdev;
3374         struct hnae3_ring_chain_node *cur_chain = head;
3375         struct hnae3_ring_chain_node *chain;
3376         struct hns3_enet_ring *tx_ring;
3377         struct hns3_enet_ring *rx_ring;
3378
3379         tx_ring = tqp_vector->tx_group.ring;
3380         if (tx_ring) {
3381                 cur_chain->tqp_index = tx_ring->tqp->tqp_index;
3382                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3383                               HNAE3_RING_TYPE_TX);
3384                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3385                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_TX);
3386
3387                 cur_chain->next = NULL;
3388
3389                 while (tx_ring->next) {
3390                         tx_ring = tx_ring->next;
3391
3392                         chain = devm_kzalloc(&pdev->dev, sizeof(*chain),
3393                                              GFP_KERNEL);
3394                         if (!chain)
3395                                 goto err_free_chain;
3396
3397                         cur_chain->next = chain;
3398                         chain->tqp_index = tx_ring->tqp->tqp_index;
3399                         hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3400                                       HNAE3_RING_TYPE_TX);
3401                         hnae3_set_field(chain->int_gl_idx,
3402                                         HNAE3_RING_GL_IDX_M,
3403                                         HNAE3_RING_GL_IDX_S,
3404                                         HNAE3_RING_GL_TX);
3405
3406                         cur_chain = chain;
3407                 }
3408         }
3409
3410         rx_ring = tqp_vector->rx_group.ring;
3411         if (!tx_ring && rx_ring) {
3412                 cur_chain->next = NULL;
3413                 cur_chain->tqp_index = rx_ring->tqp->tqp_index;
3414                 hnae3_set_bit(cur_chain->flag, HNAE3_RING_TYPE_B,
3415                               HNAE3_RING_TYPE_RX);
3416                 hnae3_set_field(cur_chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3417                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3418
3419                 rx_ring = rx_ring->next;
3420         }
3421
3422         while (rx_ring) {
3423                 chain = devm_kzalloc(&pdev->dev, sizeof(*chain), GFP_KERNEL);
3424                 if (!chain)
3425                         goto err_free_chain;
3426
3427                 cur_chain->next = chain;
3428                 chain->tqp_index = rx_ring->tqp->tqp_index;
3429                 hnae3_set_bit(chain->flag, HNAE3_RING_TYPE_B,
3430                               HNAE3_RING_TYPE_RX);
3431                 hnae3_set_field(chain->int_gl_idx, HNAE3_RING_GL_IDX_M,
3432                                 HNAE3_RING_GL_IDX_S, HNAE3_RING_GL_RX);
3433
3434                 cur_chain = chain;
3435
3436                 rx_ring = rx_ring->next;
3437         }
3438
3439         return 0;
3440
3441 err_free_chain:
3442         cur_chain = head->next;
3443         while (cur_chain) {
3444                 chain = cur_chain->next;
3445                 devm_kfree(&pdev->dev, cur_chain);
3446                 cur_chain = chain;
3447         }
3448         head->next = NULL;
3449
3450         return -ENOMEM;
3451 }
3452
3453 static void hns3_free_vector_ring_chain(struct hns3_enet_tqp_vector *tqp_vector,
3454                                         struct hnae3_ring_chain_node *head)
3455 {
3456         struct pci_dev *pdev = tqp_vector->handle->pdev;
3457         struct hnae3_ring_chain_node *chain_tmp, *chain;
3458
3459         chain = head->next;
3460
3461         while (chain) {
3462                 chain_tmp = chain->next;
3463                 devm_kfree(&pdev->dev, chain);
3464                 chain = chain_tmp;
3465         }
3466 }
3467
3468 static void hns3_add_ring_to_group(struct hns3_enet_ring_group *group,
3469                                    struct hns3_enet_ring *ring)
3470 {
3471         ring->next = group->ring;
3472         group->ring = ring;
3473
3474         group->count++;
3475 }
3476
3477 static void hns3_nic_set_cpumask(struct hns3_nic_priv *priv)
3478 {
3479         struct pci_dev *pdev = priv->ae_handle->pdev;
3480         struct hns3_enet_tqp_vector *tqp_vector;
3481         int num_vectors = priv->vector_num;
3482         int numa_node;
3483         int vector_i;
3484
3485         numa_node = dev_to_node(&pdev->dev);
3486
3487         for (vector_i = 0; vector_i < num_vectors; vector_i++) {
3488                 tqp_vector = &priv->tqp_vector[vector_i];
3489                 cpumask_set_cpu(cpumask_local_spread(vector_i, numa_node),
3490                                 &tqp_vector->affinity_mask);
3491         }
3492 }
3493
3494 static int hns3_nic_init_vector_data(struct hns3_nic_priv *priv)
3495 {
3496         struct hnae3_ring_chain_node vector_ring_chain;
3497         struct hnae3_handle *h = priv->ae_handle;
3498         struct hns3_enet_tqp_vector *tqp_vector;
3499         int ret = 0;
3500         int i;
3501
3502         hns3_nic_set_cpumask(priv);
3503
3504         for (i = 0; i < priv->vector_num; i++) {
3505                 tqp_vector = &priv->tqp_vector[i];
3506                 hns3_vector_gl_rl_init_hw(tqp_vector, priv);
3507                 tqp_vector->num_tqps = 0;
3508         }
3509
3510         for (i = 0; i < h->kinfo.num_tqps; i++) {
3511                 u16 vector_i = i % priv->vector_num;
3512                 u16 tqp_num = h->kinfo.num_tqps;
3513
3514                 tqp_vector = &priv->tqp_vector[vector_i];
3515
3516                 hns3_add_ring_to_group(&tqp_vector->tx_group,
3517                                        &priv->ring[i]);
3518
3519                 hns3_add_ring_to_group(&tqp_vector->rx_group,
3520                                        &priv->ring[i + tqp_num]);
3521
3522                 priv->ring[i].tqp_vector = tqp_vector;
3523                 priv->ring[i + tqp_num].tqp_vector = tqp_vector;
3524                 tqp_vector->num_tqps++;
3525         }
3526
3527         for (i = 0; i < priv->vector_num; i++) {
3528                 tqp_vector = &priv->tqp_vector[i];
3529
3530                 tqp_vector->rx_group.total_bytes = 0;
3531                 tqp_vector->rx_group.total_packets = 0;
3532                 tqp_vector->tx_group.total_bytes = 0;
3533                 tqp_vector->tx_group.total_packets = 0;
3534                 tqp_vector->handle = h;
3535
3536                 ret = hns3_get_vector_ring_chain(tqp_vector,
3537                                                  &vector_ring_chain);
3538                 if (ret)
3539                         goto map_ring_fail;
3540
3541                 ret = h->ae_algo->ops->map_ring_to_vector(h,
3542                         tqp_vector->vector_irq, &vector_ring_chain);
3543
3544                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3545
3546                 if (ret)
3547                         goto map_ring_fail;
3548
3549                 netif_napi_add(priv->netdev, &tqp_vector->napi,
3550                                hns3_nic_common_poll, NAPI_POLL_WEIGHT);
3551         }
3552
3553         return 0;
3554
3555 map_ring_fail:
3556         while (i--)
3557                 netif_napi_del(&priv->tqp_vector[i].napi);
3558
3559         return ret;
3560 }
3561
3562 static int hns3_nic_alloc_vector_data(struct hns3_nic_priv *priv)
3563 {
3564 #define HNS3_VECTOR_PF_MAX_NUM          64
3565
3566         struct hnae3_handle *h = priv->ae_handle;
3567         struct hns3_enet_tqp_vector *tqp_vector;
3568         struct hnae3_vector_info *vector;
3569         struct pci_dev *pdev = h->pdev;
3570         u16 tqp_num = h->kinfo.num_tqps;
3571         u16 vector_num;
3572         int ret = 0;
3573         u16 i;
3574
3575         /* RSS size, cpu online and vector_num should be the same */
3576         /* Should consider 2p/4p later */
3577         vector_num = min_t(u16, num_online_cpus(), tqp_num);
3578         vector_num = min_t(u16, vector_num, HNS3_VECTOR_PF_MAX_NUM);
3579
3580         vector = devm_kcalloc(&pdev->dev, vector_num, sizeof(*vector),
3581                               GFP_KERNEL);
3582         if (!vector)
3583                 return -ENOMEM;
3584
3585         /* save the actual available vector number */
3586         vector_num = h->ae_algo->ops->get_vector(h, vector_num, vector);
3587
3588         priv->vector_num = vector_num;
3589         priv->tqp_vector = (struct hns3_enet_tqp_vector *)
3590                 devm_kcalloc(&pdev->dev, vector_num, sizeof(*priv->tqp_vector),
3591                              GFP_KERNEL);
3592         if (!priv->tqp_vector) {
3593                 ret = -ENOMEM;
3594                 goto out;
3595         }
3596
3597         for (i = 0; i < priv->vector_num; i++) {
3598                 tqp_vector = &priv->tqp_vector[i];
3599                 tqp_vector->idx = i;
3600                 tqp_vector->mask_addr = vector[i].io_addr;
3601                 tqp_vector->vector_irq = vector[i].vector;
3602                 hns3_vector_gl_rl_init(tqp_vector, priv);
3603         }
3604
3605 out:
3606         devm_kfree(&pdev->dev, vector);
3607         return ret;
3608 }
3609
3610 static void hns3_clear_ring_group(struct hns3_enet_ring_group *group)
3611 {
3612         group->ring = NULL;
3613         group->count = 0;
3614 }
3615
3616 static void hns3_nic_uninit_vector_data(struct hns3_nic_priv *priv)
3617 {
3618         struct hnae3_ring_chain_node vector_ring_chain;
3619         struct hnae3_handle *h = priv->ae_handle;
3620         struct hns3_enet_tqp_vector *tqp_vector;
3621         int i;
3622
3623         for (i = 0; i < priv->vector_num; i++) {
3624                 tqp_vector = &priv->tqp_vector[i];
3625
3626                 if (!tqp_vector->rx_group.ring && !tqp_vector->tx_group.ring)
3627                         continue;
3628
3629                 /* Since the mapping can be overwritten, when fail to get the
3630                  * chain between vector and ring, we should go on to deal with
3631                  * the remaining options.
3632                  */
3633                 if (hns3_get_vector_ring_chain(tqp_vector, &vector_ring_chain))
3634                         dev_warn(priv->dev, "failed to get ring chain\n");
3635
3636                 h->ae_algo->ops->unmap_ring_from_vector(h,
3637                         tqp_vector->vector_irq, &vector_ring_chain);
3638
3639                 hns3_free_vector_ring_chain(tqp_vector, &vector_ring_chain);
3640
3641                 hns3_clear_ring_group(&tqp_vector->rx_group);
3642                 hns3_clear_ring_group(&tqp_vector->tx_group);
3643                 netif_napi_del(&priv->tqp_vector[i].napi);
3644         }
3645 }
3646
3647 static void hns3_nic_dealloc_vector_data(struct hns3_nic_priv *priv)
3648 {
3649         struct hnae3_handle *h = priv->ae_handle;
3650         struct pci_dev *pdev = h->pdev;
3651         int i, ret;
3652
3653         for (i = 0; i < priv->vector_num; i++) {
3654                 struct hns3_enet_tqp_vector *tqp_vector;
3655
3656                 tqp_vector = &priv->tqp_vector[i];
3657                 ret = h->ae_algo->ops->put_vector(h, tqp_vector->vector_irq);
3658                 if (ret)
3659                         return;
3660         }
3661
3662         devm_kfree(&pdev->dev, priv->tqp_vector);
3663 }
3664
3665 static void hns3_ring_get_cfg(struct hnae3_queue *q, struct hns3_nic_priv *priv,
3666                               unsigned int ring_type)
3667 {
3668         int queue_num = priv->ae_handle->kinfo.num_tqps;
3669         struct hns3_enet_ring *ring;
3670         int desc_num;
3671
3672         if (ring_type == HNAE3_RING_TYPE_TX) {
3673                 ring = &priv->ring[q->tqp_index];
3674                 desc_num = priv->ae_handle->kinfo.num_tx_desc;
3675                 ring->queue_index = q->tqp_index;
3676                 ring->io_base = (u8 __iomem *)q->io_base + HNS3_TX_REG_OFFSET;
3677         } else {
3678                 ring = &priv->ring[q->tqp_index + queue_num];
3679                 desc_num = priv->ae_handle->kinfo.num_rx_desc;
3680                 ring->queue_index = q->tqp_index;
3681                 ring->io_base = q->io_base;
3682         }
3683
3684         hnae3_set_bit(ring->flag, HNAE3_RING_TYPE_B, ring_type);
3685
3686         ring->tqp = q;
3687         ring->desc = NULL;
3688         ring->desc_cb = NULL;
3689         ring->dev = priv->dev;
3690         ring->desc_dma_addr = 0;
3691         ring->buf_size = q->buf_size;
3692         ring->desc_num = desc_num;
3693         ring->next_to_use = 0;
3694         ring->next_to_clean = 0;
3695 }
3696
3697 static void hns3_queue_to_ring(struct hnae3_queue *tqp,
3698                                struct hns3_nic_priv *priv)
3699 {
3700         hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_TX);
3701         hns3_ring_get_cfg(tqp, priv, HNAE3_RING_TYPE_RX);
3702 }
3703
3704 static int hns3_get_ring_config(struct hns3_nic_priv *priv)
3705 {
3706         struct hnae3_handle *h = priv->ae_handle;
3707         struct pci_dev *pdev = h->pdev;
3708         int i;
3709
3710         priv->ring = devm_kzalloc(&pdev->dev,
3711                                   array3_size(h->kinfo.num_tqps,
3712                                               sizeof(*priv->ring), 2),
3713                                   GFP_KERNEL);
3714         if (!priv->ring)
3715                 return -ENOMEM;
3716
3717         for (i = 0; i < h->kinfo.num_tqps; i++)
3718                 hns3_queue_to_ring(h->kinfo.tqp[i], priv);
3719
3720         return 0;
3721 }
3722
3723 static void hns3_put_ring_config(struct hns3_nic_priv *priv)
3724 {
3725         if (!priv->ring)
3726                 return;
3727
3728         devm_kfree(priv->dev, priv->ring);
3729         priv->ring = NULL;
3730 }
3731
3732 static int hns3_alloc_ring_memory(struct hns3_enet_ring *ring)
3733 {
3734         int ret;
3735
3736         if (ring->desc_num <= 0 || ring->buf_size <= 0)
3737                 return -EINVAL;
3738
3739         ring->desc_cb = devm_kcalloc(ring_to_dev(ring), ring->desc_num,
3740                                      sizeof(ring->desc_cb[0]), GFP_KERNEL);
3741         if (!ring->desc_cb) {
3742                 ret = -ENOMEM;
3743                 goto out;
3744         }
3745
3746         ret = hns3_alloc_desc(ring);
3747         if (ret)
3748                 goto out_with_desc_cb;
3749
3750         if (!HNAE3_IS_TX_RING(ring)) {
3751                 ret = hns3_alloc_ring_buffers(ring);
3752                 if (ret)
3753                         goto out_with_desc;
3754         }
3755
3756         return 0;
3757
3758 out_with_desc:
3759         hns3_free_desc(ring);
3760 out_with_desc_cb:
3761         devm_kfree(ring_to_dev(ring), ring->desc_cb);
3762         ring->desc_cb = NULL;
3763 out:
3764         return ret;
3765 }
3766
3767 void hns3_fini_ring(struct hns3_enet_ring *ring)
3768 {
3769         hns3_free_desc(ring);
3770         devm_kfree(ring_to_dev(ring), ring->desc_cb);
3771         ring->desc_cb = NULL;
3772         ring->next_to_clean = 0;
3773         ring->next_to_use = 0;
3774         ring->pending_buf = 0;
3775         if (ring->skb) {
3776                 dev_kfree_skb_any(ring->skb);
3777                 ring->skb = NULL;
3778         }
3779 }
3780
3781 static int hns3_buf_size2type(u32 buf_size)
3782 {
3783         int bd_size_type;
3784
3785         switch (buf_size) {
3786         case 512:
3787                 bd_size_type = HNS3_BD_SIZE_512_TYPE;
3788                 break;
3789         case 1024:
3790                 bd_size_type = HNS3_BD_SIZE_1024_TYPE;
3791                 break;
3792         case 2048:
3793                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3794                 break;
3795         case 4096:
3796                 bd_size_type = HNS3_BD_SIZE_4096_TYPE;
3797                 break;
3798         default:
3799                 bd_size_type = HNS3_BD_SIZE_2048_TYPE;
3800         }
3801
3802         return bd_size_type;
3803 }
3804
3805 static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
3806 {
3807         dma_addr_t dma = ring->desc_dma_addr;
3808         struct hnae3_queue *q = ring->tqp;
3809
3810         if (!HNAE3_IS_TX_RING(ring)) {
3811                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_L_REG, (u32)dma);
3812                 hns3_write_dev(q, HNS3_RING_RX_RING_BASEADDR_H_REG,
3813                                (u32)((dma >> 31) >> 1));
3814
3815                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_LEN_REG,
3816                                hns3_buf_size2type(ring->buf_size));
3817                 hns3_write_dev(q, HNS3_RING_RX_RING_BD_NUM_REG,
3818                                ring->desc_num / 8 - 1);
3819
3820         } else {
3821                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_L_REG,
3822                                (u32)dma);
3823                 hns3_write_dev(q, HNS3_RING_TX_RING_BASEADDR_H_REG,
3824                                (u32)((dma >> 31) >> 1));
3825
3826                 hns3_write_dev(q, HNS3_RING_TX_RING_BD_NUM_REG,
3827                                ring->desc_num / 8 - 1);
3828         }
3829 }
3830
3831 static void hns3_init_tx_ring_tc(struct hns3_nic_priv *priv)
3832 {
3833         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3834         int i;
3835
3836         for (i = 0; i < HNAE3_MAX_TC; i++) {
3837                 struct hnae3_tc_info *tc_info = &kinfo->tc_info[i];
3838                 int j;
3839
3840                 if (!tc_info->enable)
3841                         continue;
3842
3843                 for (j = 0; j < tc_info->tqp_count; j++) {
3844                         struct hnae3_queue *q;
3845
3846                         q = priv->ring[tc_info->tqp_offset + j].tqp;
3847                         hns3_write_dev(q, HNS3_RING_TX_RING_TC_REG,
3848                                        tc_info->tc);
3849                 }
3850         }
3851 }
3852
3853 int hns3_init_all_ring(struct hns3_nic_priv *priv)
3854 {
3855         struct hnae3_handle *h = priv->ae_handle;
3856         int ring_num = h->kinfo.num_tqps * 2;
3857         int i, j;
3858         int ret;
3859
3860         for (i = 0; i < ring_num; i++) {
3861                 ret = hns3_alloc_ring_memory(&priv->ring[i]);
3862                 if (ret) {
3863                         dev_err(priv->dev,
3864                                 "Alloc ring memory fail! ret=%d\n", ret);
3865                         goto out_when_alloc_ring_memory;
3866                 }
3867
3868                 u64_stats_init(&priv->ring[i].syncp);
3869         }
3870
3871         return 0;
3872
3873 out_when_alloc_ring_memory:
3874         for (j = i - 1; j >= 0; j--)
3875                 hns3_fini_ring(&priv->ring[j]);
3876
3877         return -ENOMEM;
3878 }
3879
3880 int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
3881 {
3882         struct hnae3_handle *h = priv->ae_handle;
3883         int i;
3884
3885         for (i = 0; i < h->kinfo.num_tqps; i++) {
3886                 hns3_fini_ring(&priv->ring[i]);
3887                 hns3_fini_ring(&priv->ring[i + h->kinfo.num_tqps]);
3888         }
3889         return 0;
3890 }
3891
3892 /* Set mac addr if it is configured. or leave it to the AE driver */
3893 static int hns3_init_mac_addr(struct net_device *netdev)
3894 {
3895         struct hns3_nic_priv *priv = netdev_priv(netdev);
3896         struct hnae3_handle *h = priv->ae_handle;
3897         u8 mac_addr_temp[ETH_ALEN];
3898         int ret = 0;
3899
3900         if (h->ae_algo->ops->get_mac_addr)
3901                 h->ae_algo->ops->get_mac_addr(h, mac_addr_temp);
3902
3903         /* Check if the MAC address is valid, if not get a random one */
3904         if (!is_valid_ether_addr(mac_addr_temp)) {
3905                 eth_hw_addr_random(netdev);
3906                 dev_warn(priv->dev, "using random MAC address %pM\n",
3907                          netdev->dev_addr);
3908         } else if (!ether_addr_equal(netdev->dev_addr, mac_addr_temp)) {
3909                 ether_addr_copy(netdev->dev_addr, mac_addr_temp);
3910                 ether_addr_copy(netdev->perm_addr, mac_addr_temp);
3911         } else {
3912                 return 0;
3913         }
3914
3915         if (h->ae_algo->ops->set_mac_addr)
3916                 ret = h->ae_algo->ops->set_mac_addr(h, netdev->dev_addr, true);
3917
3918         return ret;
3919 }
3920
3921 static int hns3_init_phy(struct net_device *netdev)
3922 {
3923         struct hnae3_handle *h = hns3_get_handle(netdev);
3924         int ret = 0;
3925
3926         if (h->ae_algo->ops->mac_connect_phy)
3927                 ret = h->ae_algo->ops->mac_connect_phy(h);
3928
3929         return ret;
3930 }
3931
3932 static void hns3_uninit_phy(struct net_device *netdev)
3933 {
3934         struct hnae3_handle *h = hns3_get_handle(netdev);
3935
3936         if (h->ae_algo->ops->mac_disconnect_phy)
3937                 h->ae_algo->ops->mac_disconnect_phy(h);
3938 }
3939
3940 static void hns3_del_all_fd_rules(struct net_device *netdev, bool clear_list)
3941 {
3942         struct hnae3_handle *h = hns3_get_handle(netdev);
3943
3944         if (h->ae_algo->ops->del_all_fd_entries)
3945                 h->ae_algo->ops->del_all_fd_entries(h, clear_list);
3946 }
3947
3948 static int hns3_client_start(struct hnae3_handle *handle)
3949 {
3950         if (!handle->ae_algo->ops->client_start)
3951                 return 0;
3952
3953         return handle->ae_algo->ops->client_start(handle);
3954 }
3955
3956 static void hns3_client_stop(struct hnae3_handle *handle)
3957 {
3958         if (!handle->ae_algo->ops->client_stop)
3959                 return;
3960
3961         handle->ae_algo->ops->client_stop(handle);
3962 }
3963
3964 static void hns3_info_show(struct hns3_nic_priv *priv)
3965 {
3966         struct hnae3_knic_private_info *kinfo = &priv->ae_handle->kinfo;
3967
3968         dev_info(priv->dev, "MAC address: %pM\n", priv->netdev->dev_addr);
3969         dev_info(priv->dev, "Task queue pairs numbers: %u\n", kinfo->num_tqps);
3970         dev_info(priv->dev, "RSS size: %u\n", kinfo->rss_size);
3971         dev_info(priv->dev, "Allocated RSS size: %u\n", kinfo->req_rss_size);
3972         dev_info(priv->dev, "RX buffer length: %u\n", kinfo->rx_buf_len);
3973         dev_info(priv->dev, "Desc num per TX queue: %u\n", kinfo->num_tx_desc);
3974         dev_info(priv->dev, "Desc num per RX queue: %u\n", kinfo->num_rx_desc);
3975         dev_info(priv->dev, "Total number of enabled TCs: %u\n", kinfo->num_tc);
3976         dev_info(priv->dev, "Max mtu size: %u\n", priv->netdev->max_mtu);
3977 }
3978
3979 static int hns3_client_init(struct hnae3_handle *handle)
3980 {
3981         struct pci_dev *pdev = handle->pdev;
3982         u16 alloc_tqps, max_rss_size;
3983         struct hns3_nic_priv *priv;
3984         struct net_device *netdev;
3985         int ret;
3986
3987         handle->ae_algo->ops->get_tqps_and_rss_info(handle, &alloc_tqps,
3988                                                     &max_rss_size);
3989         netdev = alloc_etherdev_mq(sizeof(struct hns3_nic_priv), alloc_tqps);
3990         if (!netdev)
3991                 return -ENOMEM;
3992
3993         priv = netdev_priv(netdev);
3994         priv->dev = &pdev->dev;
3995         priv->netdev = netdev;
3996         priv->ae_handle = handle;
3997         priv->tx_timeout_count = 0;
3998         set_bit(HNS3_NIC_STATE_DOWN, &priv->state);
3999
4000         handle->msg_enable = netif_msg_init(debug, DEFAULT_MSG_LEVEL);
4001
4002         handle->kinfo.netdev = netdev;
4003         handle->priv = (void *)priv;
4004
4005         hns3_init_mac_addr(netdev);
4006
4007         hns3_set_default_feature(netdev);
4008
4009         netdev->watchdog_timeo = HNS3_TX_TIMEOUT;
4010         netdev->priv_flags |= IFF_UNICAST_FLT;
4011         netdev->netdev_ops = &hns3_nic_netdev_ops;
4012         SET_NETDEV_DEV(netdev, &pdev->dev);
4013         hns3_ethtool_set_ops(netdev);
4014
4015         /* Carrier off reporting is important to ethtool even BEFORE open */
4016         netif_carrier_off(netdev);
4017
4018         ret = hns3_get_ring_config(priv);
4019         if (ret) {
4020                 ret = -ENOMEM;
4021                 goto out_get_ring_cfg;
4022         }
4023
4024         ret = hns3_nic_alloc_vector_data(priv);
4025         if (ret) {
4026                 ret = -ENOMEM;
4027                 goto out_alloc_vector_data;
4028         }
4029
4030         ret = hns3_nic_init_vector_data(priv);
4031         if (ret) {
4032                 ret = -ENOMEM;
4033                 goto out_init_vector_data;
4034         }
4035
4036         ret = hns3_init_all_ring(priv);
4037         if (ret) {
4038                 ret = -ENOMEM;
4039                 goto out_init_ring;
4040         }
4041
4042         ret = hns3_init_phy(netdev);
4043         if (ret)
4044                 goto out_init_phy;
4045
4046         ret = register_netdev(netdev);
4047         if (ret) {
4048                 dev_err(priv->dev, "probe register netdev fail!\n");
4049                 goto out_reg_netdev_fail;
4050         }
4051
4052         /* the device can work without cpu rmap, only aRFS needs it */
4053         ret = hns3_set_rx_cpu_rmap(netdev);
4054         if (ret)
4055                 dev_warn(priv->dev, "set rx cpu rmap fail, ret=%d\n", ret);
4056
4057         ret = hns3_nic_init_irq(priv);
4058         if (ret) {
4059                 dev_err(priv->dev, "init irq failed! ret=%d\n", ret);
4060                 hns3_free_rx_cpu_rmap(netdev);
4061                 goto out_init_irq_fail;
4062         }
4063
4064         ret = hns3_client_start(handle);
4065         if (ret) {
4066                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
4067                 goto out_client_start;
4068         }
4069
4070         hns3_dcbnl_setup(handle);
4071
4072         hns3_dbg_init(handle);
4073
4074         /* MTU range: (ETH_MIN_MTU(kernel default) - 9702) */
4075         netdev->max_mtu = HNS3_MAX_MTU;
4076
4077         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4078
4079         if (netif_msg_drv(handle))
4080                 hns3_info_show(priv);
4081
4082         return ret;
4083
4084 out_client_start:
4085         hns3_free_rx_cpu_rmap(netdev);
4086         hns3_nic_uninit_irq(priv);
4087 out_init_irq_fail:
4088         unregister_netdev(netdev);
4089 out_reg_netdev_fail:
4090         hns3_uninit_phy(netdev);
4091 out_init_phy:
4092         hns3_uninit_all_ring(priv);
4093 out_init_ring:
4094         hns3_nic_uninit_vector_data(priv);
4095 out_init_vector_data:
4096         hns3_nic_dealloc_vector_data(priv);
4097 out_alloc_vector_data:
4098         priv->ring = NULL;
4099 out_get_ring_cfg:
4100         priv->ae_handle = NULL;
4101         free_netdev(netdev);
4102         return ret;
4103 }
4104
4105 static void hns3_client_uninit(struct hnae3_handle *handle, bool reset)
4106 {
4107         struct net_device *netdev = handle->kinfo.netdev;
4108         struct hns3_nic_priv *priv = netdev_priv(netdev);
4109         int ret;
4110
4111         if (netdev->reg_state != NETREG_UNINITIALIZED)
4112                 unregister_netdev(netdev);
4113
4114         hns3_client_stop(handle);
4115
4116         hns3_uninit_phy(netdev);
4117
4118         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4119                 netdev_warn(netdev, "already uninitialized\n");
4120                 goto out_netdev_free;
4121         }
4122
4123         hns3_free_rx_cpu_rmap(netdev);
4124
4125         hns3_nic_uninit_irq(priv);
4126
4127         hns3_del_all_fd_rules(netdev, true);
4128
4129         hns3_clear_all_ring(handle, true);
4130
4131         hns3_nic_uninit_vector_data(priv);
4132
4133         hns3_nic_dealloc_vector_data(priv);
4134
4135         ret = hns3_uninit_all_ring(priv);
4136         if (ret)
4137                 netdev_err(netdev, "uninit ring error\n");
4138
4139         hns3_put_ring_config(priv);
4140
4141 out_netdev_free:
4142         hns3_dbg_uninit(handle);
4143         free_netdev(netdev);
4144 }
4145
4146 static void hns3_link_status_change(struct hnae3_handle *handle, bool linkup)
4147 {
4148         struct net_device *netdev = handle->kinfo.netdev;
4149
4150         if (!netdev)
4151                 return;
4152
4153         if (linkup) {
4154                 netif_tx_wake_all_queues(netdev);
4155                 netif_carrier_on(netdev);
4156                 if (netif_msg_link(handle))
4157                         netdev_info(netdev, "link up\n");
4158         } else {
4159                 netif_carrier_off(netdev);
4160                 netif_tx_stop_all_queues(netdev);
4161                 if (netif_msg_link(handle))
4162                         netdev_info(netdev, "link down\n");
4163         }
4164 }
4165
4166 static int hns3_client_setup_tc(struct hnae3_handle *handle, u8 tc)
4167 {
4168         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4169         struct net_device *ndev = kinfo->netdev;
4170
4171         if (tc > HNAE3_MAX_TC)
4172                 return -EINVAL;
4173
4174         if (!ndev)
4175                 return -ENODEV;
4176
4177         return hns3_nic_set_real_num_queue(ndev);
4178 }
4179
4180 static void hns3_clear_tx_ring(struct hns3_enet_ring *ring)
4181 {
4182         while (ring->next_to_clean != ring->next_to_use) {
4183                 ring->desc[ring->next_to_clean].tx.bdtp_fe_sc_vld_ra_ri = 0;
4184                 hns3_free_buffer_detach(ring, ring->next_to_clean);
4185                 ring_ptr_move_fw(ring, next_to_clean);
4186         }
4187 }
4188
4189 static int hns3_clear_rx_ring(struct hns3_enet_ring *ring)
4190 {
4191         struct hns3_desc_cb res_cbs;
4192         int ret;
4193
4194         while (ring->next_to_use != ring->next_to_clean) {
4195                 /* When a buffer is not reused, it's memory has been
4196                  * freed in hns3_handle_rx_bd or will be freed by
4197                  * stack, so we need to replace the buffer here.
4198                  */
4199                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
4200                         ret = hns3_alloc_and_map_buffer(ring, &res_cbs);
4201                         if (ret) {
4202                                 u64_stats_update_begin(&ring->syncp);
4203                                 ring->stats.sw_err_cnt++;
4204                                 u64_stats_update_end(&ring->syncp);
4205                                 /* if alloc new buffer fail, exit directly
4206                                  * and reclear in up flow.
4207                                  */
4208                                 netdev_warn(ring_to_netdev(ring),
4209                                             "reserve buffer map failed, ret = %d\n",
4210                                             ret);
4211                                 return ret;
4212                         }
4213                         hns3_replace_buffer(ring, ring->next_to_use, &res_cbs);
4214                 }
4215                 ring_ptr_move_fw(ring, next_to_use);
4216         }
4217
4218         /* Free the pending skb in rx ring */
4219         if (ring->skb) {
4220                 dev_kfree_skb_any(ring->skb);
4221                 ring->skb = NULL;
4222                 ring->pending_buf = 0;
4223         }
4224
4225         return 0;
4226 }
4227
4228 static void hns3_force_clear_rx_ring(struct hns3_enet_ring *ring)
4229 {
4230         while (ring->next_to_use != ring->next_to_clean) {
4231                 /* When a buffer is not reused, it's memory has been
4232                  * freed in hns3_handle_rx_bd or will be freed by
4233                  * stack, so only need to unmap the buffer here.
4234                  */
4235                 if (!ring->desc_cb[ring->next_to_use].reuse_flag) {
4236                         hns3_unmap_buffer(ring,
4237                                           &ring->desc_cb[ring->next_to_use]);
4238                         ring->desc_cb[ring->next_to_use].dma = 0;
4239                 }
4240
4241                 ring_ptr_move_fw(ring, next_to_use);
4242         }
4243 }
4244
4245 static void hns3_clear_all_ring(struct hnae3_handle *h, bool force)
4246 {
4247         struct net_device *ndev = h->kinfo.netdev;
4248         struct hns3_nic_priv *priv = netdev_priv(ndev);
4249         u32 i;
4250
4251         for (i = 0; i < h->kinfo.num_tqps; i++) {
4252                 struct hns3_enet_ring *ring;
4253
4254                 ring = &priv->ring[i];
4255                 hns3_clear_tx_ring(ring);
4256
4257                 ring = &priv->ring[i + h->kinfo.num_tqps];
4258                 /* Continue to clear other rings even if clearing some
4259                  * rings failed.
4260                  */
4261                 if (force)
4262                         hns3_force_clear_rx_ring(ring);
4263                 else
4264                         hns3_clear_rx_ring(ring);
4265         }
4266 }
4267
4268 int hns3_nic_reset_all_ring(struct hnae3_handle *h)
4269 {
4270         struct net_device *ndev = h->kinfo.netdev;
4271         struct hns3_nic_priv *priv = netdev_priv(ndev);
4272         struct hns3_enet_ring *rx_ring;
4273         int i, j;
4274         int ret;
4275
4276         for (i = 0; i < h->kinfo.num_tqps; i++) {
4277                 ret = h->ae_algo->ops->reset_queue(h, i);
4278                 if (ret)
4279                         return ret;
4280
4281                 hns3_init_ring_hw(&priv->ring[i]);
4282
4283                 /* We need to clear tx ring here because self test will
4284                  * use the ring and will not run down before up
4285                  */
4286                 hns3_clear_tx_ring(&priv->ring[i]);
4287                 priv->ring[i].next_to_clean = 0;
4288                 priv->ring[i].next_to_use = 0;
4289
4290                 rx_ring = &priv->ring[i + h->kinfo.num_tqps];
4291                 hns3_init_ring_hw(rx_ring);
4292                 ret = hns3_clear_rx_ring(rx_ring);
4293                 if (ret)
4294                         return ret;
4295
4296                 /* We can not know the hardware head and tail when this
4297                  * function is called in reset flow, so we reuse all desc.
4298                  */
4299                 for (j = 0; j < rx_ring->desc_num; j++)
4300                         hns3_reuse_buffer(rx_ring, j);
4301
4302                 rx_ring->next_to_clean = 0;
4303                 rx_ring->next_to_use = 0;
4304         }
4305
4306         hns3_init_tx_ring_tc(priv);
4307
4308         return 0;
4309 }
4310
4311 static void hns3_store_coal(struct hns3_nic_priv *priv)
4312 {
4313         /* ethtool only support setting and querying one coal
4314          * configuration for now, so save the vector 0' coal
4315          * configuration here in order to restore it.
4316          */
4317         memcpy(&priv->tx_coal, &priv->tqp_vector[0].tx_group.coal,
4318                sizeof(struct hns3_enet_coalesce));
4319         memcpy(&priv->rx_coal, &priv->tqp_vector[0].rx_group.coal,
4320                sizeof(struct hns3_enet_coalesce));
4321 }
4322
4323 static void hns3_restore_coal(struct hns3_nic_priv *priv)
4324 {
4325         u16 vector_num = priv->vector_num;
4326         int i;
4327
4328         for (i = 0; i < vector_num; i++) {
4329                 memcpy(&priv->tqp_vector[i].tx_group.coal, &priv->tx_coal,
4330                        sizeof(struct hns3_enet_coalesce));
4331                 memcpy(&priv->tqp_vector[i].rx_group.coal, &priv->rx_coal,
4332                        sizeof(struct hns3_enet_coalesce));
4333         }
4334 }
4335
4336 static int hns3_reset_notify_down_enet(struct hnae3_handle *handle)
4337 {
4338         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4339         struct net_device *ndev = kinfo->netdev;
4340         struct hns3_nic_priv *priv = netdev_priv(ndev);
4341
4342         if (test_and_set_bit(HNS3_NIC_STATE_RESETTING, &priv->state))
4343                 return 0;
4344
4345         if (!netif_running(ndev))
4346                 return 0;
4347
4348         return hns3_nic_net_stop(ndev);
4349 }
4350
4351 static int hns3_reset_notify_up_enet(struct hnae3_handle *handle)
4352 {
4353         struct hnae3_knic_private_info *kinfo = &handle->kinfo;
4354         struct hns3_nic_priv *priv = netdev_priv(kinfo->netdev);
4355         int ret = 0;
4356
4357         clear_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4358
4359         if (netif_running(kinfo->netdev)) {
4360                 ret = hns3_nic_net_open(kinfo->netdev);
4361                 if (ret) {
4362                         set_bit(HNS3_NIC_STATE_RESETTING, &priv->state);
4363                         netdev_err(kinfo->netdev,
4364                                    "net up fail, ret=%d!\n", ret);
4365                         return ret;
4366                 }
4367         }
4368
4369         return ret;
4370 }
4371
4372 static int hns3_reset_notify_init_enet(struct hnae3_handle *handle)
4373 {
4374         struct net_device *netdev = handle->kinfo.netdev;
4375         struct hns3_nic_priv *priv = netdev_priv(netdev);
4376         int ret;
4377
4378         /* Carrier off reporting is important to ethtool even BEFORE open */
4379         netif_carrier_off(netdev);
4380
4381         ret = hns3_get_ring_config(priv);
4382         if (ret)
4383                 return ret;
4384
4385         ret = hns3_nic_alloc_vector_data(priv);
4386         if (ret)
4387                 goto err_put_ring;
4388
4389         hns3_restore_coal(priv);
4390
4391         ret = hns3_nic_init_vector_data(priv);
4392         if (ret)
4393                 goto err_dealloc_vector;
4394
4395         ret = hns3_init_all_ring(priv);
4396         if (ret)
4397                 goto err_uninit_vector;
4398
4399         /* the device can work without cpu rmap, only aRFS needs it */
4400         ret = hns3_set_rx_cpu_rmap(netdev);
4401         if (ret)
4402                 dev_warn(priv->dev, "set rx cpu rmap fail, ret=%d\n", ret);
4403
4404         ret = hns3_nic_init_irq(priv);
4405         if (ret) {
4406                 dev_err(priv->dev, "init irq failed! ret=%d\n", ret);
4407                 hns3_free_rx_cpu_rmap(netdev);
4408                 goto err_init_irq_fail;
4409         }
4410
4411         if (!hns3_is_phys_func(handle->pdev))
4412                 hns3_init_mac_addr(netdev);
4413
4414         ret = hns3_client_start(handle);
4415         if (ret) {
4416                 dev_err(priv->dev, "hns3_client_start fail! ret=%d\n", ret);
4417                 goto err_client_start_fail;
4418         }
4419
4420         set_bit(HNS3_NIC_STATE_INITED, &priv->state);
4421
4422         return ret;
4423
4424 err_client_start_fail:
4425         hns3_free_rx_cpu_rmap(netdev);
4426         hns3_nic_uninit_irq(priv);
4427 err_init_irq_fail:
4428         hns3_uninit_all_ring(priv);
4429 err_uninit_vector:
4430         hns3_nic_uninit_vector_data(priv);
4431 err_dealloc_vector:
4432         hns3_nic_dealloc_vector_data(priv);
4433 err_put_ring:
4434         hns3_put_ring_config(priv);
4435
4436         return ret;
4437 }
4438
4439 static int hns3_reset_notify_uninit_enet(struct hnae3_handle *handle)
4440 {
4441         struct net_device *netdev = handle->kinfo.netdev;
4442         struct hns3_nic_priv *priv = netdev_priv(netdev);
4443         int ret;
4444
4445         if (!test_and_clear_bit(HNS3_NIC_STATE_INITED, &priv->state)) {
4446                 netdev_warn(netdev, "already uninitialized\n");
4447                 return 0;
4448         }
4449
4450         hns3_free_rx_cpu_rmap(netdev);
4451         hns3_nic_uninit_irq(priv);
4452         hns3_clear_all_ring(handle, true);
4453         hns3_reset_tx_queue(priv->ae_handle);
4454
4455         hns3_nic_uninit_vector_data(priv);
4456
4457         hns3_store_coal(priv);
4458
4459         hns3_nic_dealloc_vector_data(priv);
4460
4461         ret = hns3_uninit_all_ring(priv);
4462         if (ret)
4463                 netdev_err(netdev, "uninit ring error\n");
4464
4465         hns3_put_ring_config(priv);
4466
4467         return ret;
4468 }
4469
4470 static int hns3_reset_notify(struct hnae3_handle *handle,
4471                              enum hnae3_reset_notify_type type)
4472 {
4473         int ret = 0;
4474
4475         switch (type) {
4476         case HNAE3_UP_CLIENT:
4477                 ret = hns3_reset_notify_up_enet(handle);
4478                 break;
4479         case HNAE3_DOWN_CLIENT:
4480                 ret = hns3_reset_notify_down_enet(handle);
4481                 break;
4482         case HNAE3_INIT_CLIENT:
4483                 ret = hns3_reset_notify_init_enet(handle);
4484                 break;
4485         case HNAE3_UNINIT_CLIENT:
4486                 ret = hns3_reset_notify_uninit_enet(handle);
4487                 break;
4488         default:
4489                 break;
4490         }
4491
4492         return ret;
4493 }
4494
4495 static int hns3_change_channels(struct hnae3_handle *handle, u32 new_tqp_num,
4496                                 bool rxfh_configured)
4497 {
4498         int ret;
4499
4500         ret = handle->ae_algo->ops->set_channels(handle, new_tqp_num,
4501                                                  rxfh_configured);
4502         if (ret) {
4503                 dev_err(&handle->pdev->dev,
4504                         "Change tqp num(%u) fail.\n", new_tqp_num);
4505                 return ret;
4506         }
4507
4508         ret = hns3_reset_notify(handle, HNAE3_INIT_CLIENT);
4509         if (ret)
4510                 return ret;
4511
4512         ret =  hns3_reset_notify(handle, HNAE3_UP_CLIENT);
4513         if (ret)
4514                 hns3_reset_notify(handle, HNAE3_UNINIT_CLIENT);
4515
4516         return ret;
4517 }
4518
4519 int hns3_set_channels(struct net_device *netdev,
4520                       struct ethtool_channels *ch)
4521 {
4522         struct hnae3_handle *h = hns3_get_handle(netdev);
4523         struct hnae3_knic_private_info *kinfo = &h->kinfo;
4524         bool rxfh_configured = netif_is_rxfh_configured(netdev);
4525         u32 new_tqp_num = ch->combined_count;
4526         u16 org_tqp_num;
4527         int ret;
4528
4529         if (hns3_nic_resetting(netdev))
4530                 return -EBUSY;
4531
4532         if (ch->rx_count || ch->tx_count)
4533                 return -EINVAL;
4534
4535         if (new_tqp_num > hns3_get_max_available_channels(h) ||
4536             new_tqp_num < 1) {
4537                 dev_err(&netdev->dev,
4538                         "Change tqps fail, the tqp range is from 1 to %u",
4539                         hns3_get_max_available_channels(h));
4540                 return -EINVAL;
4541         }
4542
4543         if (kinfo->rss_size == new_tqp_num)
4544                 return 0;
4545
4546         netif_dbg(h, drv, netdev,
4547                   "set channels: tqp_num=%u, rxfh=%d\n",
4548                   new_tqp_num, rxfh_configured);
4549
4550         ret = hns3_reset_notify(h, HNAE3_DOWN_CLIENT);
4551         if (ret)
4552                 return ret;
4553
4554         ret = hns3_reset_notify(h, HNAE3_UNINIT_CLIENT);
4555         if (ret)
4556                 return ret;
4557
4558         org_tqp_num = h->kinfo.num_tqps;
4559         ret = hns3_change_channels(h, new_tqp_num, rxfh_configured);
4560         if (ret) {
4561                 int ret1;
4562
4563                 netdev_warn(netdev,
4564                             "Change channels fail, revert to old value\n");
4565                 ret1 = hns3_change_channels(h, org_tqp_num, rxfh_configured);
4566                 if (ret1) {
4567                         netdev_err(netdev,
4568                                    "revert to old channel fail\n");
4569                         return ret1;
4570                 }
4571
4572                 return ret;
4573         }
4574
4575         return 0;
4576 }
4577
4578 static const struct hns3_hw_error_info hns3_hw_err[] = {
4579         { .type = HNAE3_PPU_POISON_ERROR,
4580           .msg = "PPU poison" },
4581         { .type = HNAE3_CMDQ_ECC_ERROR,
4582           .msg = "IMP CMDQ error" },
4583         { .type = HNAE3_IMP_RD_POISON_ERROR,
4584           .msg = "IMP RD poison" },
4585 };
4586
4587 static void hns3_process_hw_error(struct hnae3_handle *handle,
4588                                   enum hnae3_hw_error_type type)
4589 {
4590         int i;
4591
4592         for (i = 0; i < ARRAY_SIZE(hns3_hw_err); i++) {
4593                 if (hns3_hw_err[i].type == type) {
4594                         dev_err(&handle->pdev->dev, "Detected %s!\n",
4595                                 hns3_hw_err[i].msg);
4596                         break;
4597                 }
4598         }
4599 }
4600
4601 static const struct hnae3_client_ops client_ops = {
4602         .init_instance = hns3_client_init,
4603         .uninit_instance = hns3_client_uninit,
4604         .link_status_change = hns3_link_status_change,
4605         .setup_tc = hns3_client_setup_tc,
4606         .reset_notify = hns3_reset_notify,
4607         .process_hw_error = hns3_process_hw_error,
4608 };
4609
4610 /* hns3_init_module - Driver registration routine
4611  * hns3_init_module is the first routine called when the driver is
4612  * loaded. All it does is register with the PCI subsystem.
4613  */
4614 static int __init hns3_init_module(void)
4615 {
4616         int ret;
4617
4618         pr_info("%s: %s - version\n", hns3_driver_name, hns3_driver_string);
4619         pr_info("%s: %s\n", hns3_driver_name, hns3_copyright);
4620
4621         client.type = HNAE3_CLIENT_KNIC;
4622         snprintf(client.name, HNAE3_CLIENT_NAME_LENGTH, "%s",
4623                  hns3_driver_name);
4624
4625         client.ops = &client_ops;
4626
4627         INIT_LIST_HEAD(&client.node);
4628
4629         hns3_dbg_register_debugfs(hns3_driver_name);
4630
4631         ret = hnae3_register_client(&client);
4632         if (ret)
4633                 goto err_reg_client;
4634
4635         ret = pci_register_driver(&hns3_driver);
4636         if (ret)
4637                 goto err_reg_driver;
4638
4639         return ret;
4640
4641 err_reg_driver:
4642         hnae3_unregister_client(&client);
4643 err_reg_client:
4644         hns3_dbg_unregister_debugfs();
4645         return ret;
4646 }
4647 module_init(hns3_init_module);
4648
4649 /* hns3_exit_module - Driver exit cleanup routine
4650  * hns3_exit_module is called just before the driver is removed
4651  * from memory.
4652  */
4653 static void __exit hns3_exit_module(void)
4654 {
4655         pci_unregister_driver(&hns3_driver);
4656         hnae3_unregister_client(&client);
4657         hns3_dbg_unregister_debugfs();
4658 }
4659 module_exit(hns3_exit_module);
4660
4661 MODULE_DESCRIPTION("HNS3: Hisilicon Ethernet Driver");
4662 MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
4663 MODULE_LICENSE("GPL");
4664 MODULE_ALIAS("pci:hns-nic");