drivers/net/ethernet/huawei/hinic/hinic_rx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Huawei HiNIC PCI Express Linux driver
   4  * Copyright(c) 2017 Huawei Technologies Co., Ltd
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/types.h>
   9 #include <linux/errno.h>
  10 #include <linux/pci.h>
  11 #include <linux/device.h>
  12 #include <linux/netdevice.h>
  13 #include <linux/etherdevice.h>
  14 #include <linux/u64_stats_sync.h>
  15 #include <linux/slab.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/skbuff.h>
  18 #include <linux/dma-mapping.h>
  19 #include <linux/prefetch.h>
  20 #include <linux/cpumask.h>
  21 #include <linux/if_vlan.h>
  22 #include <asm/barrier.h>
  23
  24 #include "hinic_common.h"
  25 #include "hinic_hw_if.h"
  26 #include "hinic_hw_wqe.h"
  27 #include "hinic_hw_wq.h"
  28 #include "hinic_hw_qp.h"
  29 #include "hinic_hw_dev.h"
  30 #include "hinic_rx.h"
  31 #include "hinic_dev.h"
  32
  33 #define RX_IRQ_NO_PENDING               0
  34 #define RX_IRQ_NO_COALESC               0
  35 #define RX_IRQ_NO_LLI_TIMER             0
  36 #define RX_IRQ_NO_CREDIT                0
  37 #define RX_IRQ_NO_RESEND_TIMER          0
  38 #define HINIC_RX_BUFFER_WRITE           16
  39
  40 #define HINIC_RX_IPV6_PKT               7
  41 #define LRO_PKT_HDR_LEN_IPV4            66
  42 #define LRO_PKT_HDR_LEN_IPV6            86
  43 #define LRO_REPLENISH_THLD              256
  44
  45 #define LRO_PKT_HDR_LEN(cqe)            \
  46         (HINIC_GET_RX_PKT_TYPE(be32_to_cpu((cqe)->offload_type)) == \
  47          HINIC_RX_IPV6_PKT ? LRO_PKT_HDR_LEN_IPV6 : LRO_PKT_HDR_LEN_IPV4)
  48
  49 /**
  50  * hinic_rxq_clean_stats - Clean the statistics of specific queue
  51  * @rxq: Logical Rx Queue
  52  **/
  53 void hinic_rxq_clean_stats(struct hinic_rxq *rxq)
  54 {
  55         struct hinic_rxq_stats *rxq_stats = &rxq->rxq_stats;
  56
  57         u64_stats_update_begin(&rxq_stats->syncp);
  58         rxq_stats->pkts  = 0;
  59         rxq_stats->bytes = 0;
  60         rxq_stats->errors = 0;
  61         rxq_stats->csum_errors = 0;
  62         rxq_stats->other_errors = 0;
  63         u64_stats_update_end(&rxq_stats->syncp);
  64 }
  65
  66 /**
  67  * hinic_rxq_get_stats - get statistics of Rx Queue
  68  * @rxq: Logical Rx Queue
  69  * @stats: return updated stats here
  70  **/
  71 void hinic_rxq_get_stats(struct hinic_rxq *rxq, struct hinic_rxq_stats *stats)
  72 {
  73         struct hinic_rxq_stats *rxq_stats = &rxq->rxq_stats;
  74         unsigned int start;
  75
  76         u64_stats_update_begin(&stats->syncp);
  77         do {
  78                 start = u64_stats_fetch_begin(&rxq_stats->syncp);
  79                 stats->pkts = rxq_stats->pkts;
  80                 stats->bytes = rxq_stats->bytes;
  81                 stats->errors = rxq_stats->csum_errors +
  82                                 rxq_stats->other_errors;
  83                 stats->csum_errors = rxq_stats->csum_errors;
  84                 stats->other_errors = rxq_stats->other_errors;
  85         } while (u64_stats_fetch_retry(&rxq_stats->syncp, start));
  86         u64_stats_update_end(&stats->syncp);
  87 }
  88
  89 /**
  90  * rxq_stats_init - Initialize the statistics of specific queue
  91  * @rxq: Logical Rx Queue
  92  **/
  93 static void rxq_stats_init(struct hinic_rxq *rxq)
  94 {
  95         struct hinic_rxq_stats *rxq_stats = &rxq->rxq_stats;
  96
  97         u64_stats_init(&rxq_stats->syncp);
  98         hinic_rxq_clean_stats(rxq);
  99 }
 100
 101 static void rx_csum(struct hinic_rxq *rxq, u32 status,
 102                     struct sk_buff *skb)
 103 {
 104         struct net_device *netdev = rxq->netdev;
 105         u32 csum_err;
 106
 107         csum_err = HINIC_RQ_CQE_STATUS_GET(status, CSUM_ERR);
 108
 109         if (!(netdev->features & NETIF_F_RXCSUM))
 110                 return;
 111
 112         if (!csum_err) {
 113                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 114         } else {
 115                 if (!(csum_err & (HINIC_RX_CSUM_HW_CHECK_NONE |
 116                         HINIC_RX_CSUM_IPSU_OTHER_ERR)))
 117                         rxq->rxq_stats.csum_errors++;
 118                 skb->ip_summed = CHECKSUM_NONE;
 119         }
 120 }
 121
 122 /**
 123  * rx_alloc_skb - allocate skb and map it to dma address
 124  * @rxq: rx queue
 125  * @dma_addr: returned dma address for the skb
 126  *
 127  * Return skb
 128  **/
 129 static struct sk_buff *rx_alloc_skb(struct hinic_rxq *rxq,
 130                                     dma_addr_t *dma_addr)
 131 {
 132         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 133         struct hinic_hwdev *hwdev = nic_dev->hwdev;
 134         struct hinic_hwif *hwif = hwdev->hwif;
 135         struct pci_dev *pdev = hwif->pdev;
 136         struct sk_buff *skb;
 137         dma_addr_t addr;
 138         int err;
 139
 140         skb = netdev_alloc_skb_ip_align(rxq->netdev, rxq->rq->buf_sz);
 141         if (!skb)
 142                 return NULL;
 143
 144         addr = dma_map_single(&pdev->dev, skb->data, rxq->rq->buf_sz,
 145                               DMA_FROM_DEVICE);
 146         err = dma_mapping_error(&pdev->dev, addr);
 147         if (err) {
 148                 dev_err(&pdev->dev, "Failed to map Rx DMA, err = %d\n", err);
 149                 goto err_rx_map;
 150         }
 151
 152         *dma_addr = addr;
 153         return skb;
 154
 155 err_rx_map:
 156         dev_kfree_skb_any(skb);
 157         return NULL;
 158 }
 159
 160 /**
 161  * rx_unmap_skb - unmap the dma address of the skb
 162  * @rxq: rx queue
 163  * @dma_addr: dma address of the skb
 164  **/
 165 static void rx_unmap_skb(struct hinic_rxq *rxq, dma_addr_t dma_addr)
 166 {
 167         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 168         struct hinic_hwdev *hwdev = nic_dev->hwdev;
 169         struct hinic_hwif *hwif = hwdev->hwif;
 170         struct pci_dev *pdev = hwif->pdev;
 171
 172         dma_unmap_single(&pdev->dev, dma_addr, rxq->rq->buf_sz,
 173                          DMA_FROM_DEVICE);
 174 }
 175
 176 /**
 177  * rx_free_skb - unmap and free skb
 178  * @rxq: rx queue
 179  * @skb: skb to free
 180  * @dma_addr: dma address of the skb
 181  **/
 182 static void rx_free_skb(struct hinic_rxq *rxq, struct sk_buff *skb,
 183                         dma_addr_t dma_addr)
 184 {
 185         rx_unmap_skb(rxq, dma_addr);
 186         dev_kfree_skb_any(skb);
 187 }
 188
 189 /**
 190  * rx_alloc_pkts - allocate pkts in rx queue
 191  * @rxq: rx queue
 192  *
 193  * Return number of skbs allocated
 194  **/
 195 static int rx_alloc_pkts(struct hinic_rxq *rxq)
 196 {
 197         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 198         struct hinic_rq_wqe *rq_wqe;
 199         unsigned int free_wqebbs;
 200         struct hinic_sge sge;
 201         dma_addr_t dma_addr;
 202         struct sk_buff *skb;
 203         u16 prod_idx;
 204         int i;
 205
 206         free_wqebbs = hinic_get_rq_free_wqebbs(rxq->rq);
 207
 208         /* Limit the allocation chunks */
 209         if (free_wqebbs > nic_dev->rx_weight)
 210                 free_wqebbs = nic_dev->rx_weight;
 211
 212         for (i = 0; i < free_wqebbs; i++) {
 213                 skb = rx_alloc_skb(rxq, &dma_addr);
 214                 if (!skb)
 215                         goto skb_out;
 216
 217                 hinic_set_sge(&sge, dma_addr, skb->len);
 218
 219                 rq_wqe = hinic_rq_get_wqe(rxq->rq, HINIC_RQ_WQE_SIZE,
 220                                           &prod_idx);
 221                 if (!rq_wqe) {
 222                         rx_free_skb(rxq, skb, dma_addr);
 223                         goto skb_out;
 224                 }
 225
 226                 hinic_rq_prepare_wqe(rxq->rq, prod_idx, rq_wqe, &sge);
 227
 228                 hinic_rq_write_wqe(rxq->rq, prod_idx, rq_wqe, skb);
 229         }
 230
 231 skb_out:
 232         if (i) {
 233                 wmb();  /* write all the wqes before update PI */
 234
 235                 hinic_rq_update(rxq->rq, prod_idx);
 236         }
 237
 238         return i;
 239 }
 240
 241 /**
 242  * free_all_rx_skbs - free all skbs in rx queue
 243  * @rxq: rx queue
 244  **/
 245 static void free_all_rx_skbs(struct hinic_rxq *rxq)
 246 {
 247         struct hinic_rq *rq = rxq->rq;
 248         struct hinic_hw_wqe *hw_wqe;
 249         struct hinic_sge sge;
 250         u16 ci;
 251
 252         while ((hw_wqe = hinic_read_wqe(rq->wq, HINIC_RQ_WQE_SIZE, &ci))) {
 253                 if (IS_ERR(hw_wqe))
 254                         break;
 255
 256                 hinic_rq_get_sge(rq, &hw_wqe->rq_wqe, ci, &sge);
 257
 258                 hinic_put_wqe(rq->wq, HINIC_RQ_WQE_SIZE);
 259
 260                 rx_free_skb(rxq, rq->saved_skb[ci], hinic_sge_to_dma(&sge));
 261         }
 262 }
 263
 264 /**
 265  * rx_recv_jumbo_pkt - Rx handler for jumbo pkt
 266  * @rxq: rx queue
 267  * @head_skb: the first skb in the list
 268  * @left_pkt_len: left size of the pkt exclude head skb
 269  * @ci: consumer index
 270  *
 271  * Return number of wqes that used for the left of the pkt
 272  **/
 273 static int rx_recv_jumbo_pkt(struct hinic_rxq *rxq, struct sk_buff *head_skb,
 274                              unsigned int left_pkt_len, u16 ci)
 275 {
 276         struct sk_buff *skb, *curr_skb = head_skb;
 277         struct hinic_rq_wqe *rq_wqe;
 278         unsigned int curr_len;
 279         struct hinic_sge sge;
 280         int num_wqes = 0;
 281
 282         while (left_pkt_len > 0) {
 283                 rq_wqe = hinic_rq_read_next_wqe(rxq->rq, HINIC_RQ_WQE_SIZE,
 284                                                 &skb, &ci);
 285
 286                 num_wqes++;
 287
 288                 hinic_rq_get_sge(rxq->rq, rq_wqe, ci, &sge);
 289
 290                 rx_unmap_skb(rxq, hinic_sge_to_dma(&sge));
 291
 292                 prefetch(skb->data);
 293
 294                 curr_len = (left_pkt_len > HINIC_RX_BUF_SZ) ? HINIC_RX_BUF_SZ :
 295                             left_pkt_len;
 296
 297                 left_pkt_len -= curr_len;
 298
 299                 __skb_put(skb, curr_len);
 300
 301                 if (curr_skb == head_skb)
 302                         skb_shinfo(head_skb)->frag_list = skb;
 303                 else
 304                         curr_skb->next = skb;
 305
 306                 head_skb->len += skb->len;
 307                 head_skb->data_len += skb->len;
 308                 head_skb->truesize += skb->truesize;
 309
 310                 curr_skb = skb;
 311         }
 312
 313         return num_wqes;
 314 }
 315
 316 static void hinic_copy_lp_data(struct hinic_dev *nic_dev,
 317                                struct sk_buff *skb)
 318 {
 319         struct net_device *netdev = nic_dev->netdev;
 320         u8 *lb_buf = nic_dev->lb_test_rx_buf;
 321         int lb_len = nic_dev->lb_pkt_len;
 322         int pkt_offset, frag_len, i;
 323         void *frag_data = NULL;
 324
 325         if (nic_dev->lb_test_rx_idx == LP_PKT_CNT) {
 326                 nic_dev->lb_test_rx_idx = 0;
 327                 netif_warn(nic_dev, drv, netdev, "Loopback test warning, receive too more test pkts\n");
 328         }
 329
 330         if (skb->len != nic_dev->lb_pkt_len) {
 331                 netif_warn(nic_dev, drv, netdev, "Wrong packet length\n");
 332                 nic_dev->lb_test_rx_idx++;
 333                 return;
 334         }
 335
 336         pkt_offset = nic_dev->lb_test_rx_idx * lb_len;
 337         frag_len = (int)skb_headlen(skb);
 338         memcpy(lb_buf + pkt_offset, skb->data, frag_len);
 339         pkt_offset += frag_len;
 340         for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
 341                 frag_data = skb_frag_address(&skb_shinfo(skb)->frags[i]);
 342                 frag_len = (int)skb_frag_size(&skb_shinfo(skb)->frags[i]);
 343                 memcpy((lb_buf + pkt_offset), frag_data, frag_len);
 344                 pkt_offset += frag_len;
 345         }
 346         nic_dev->lb_test_rx_idx++;
 347 }
 348
 349 /**
 350  * rxq_recv - Rx handler
 351  * @rxq: rx queue
 352  * @budget: maximum pkts to process
 353  *
 354  * Return number of pkts received
 355  **/
 356 static int rxq_recv(struct hinic_rxq *rxq, int budget)
 357 {
 358         struct hinic_qp *qp = container_of(rxq->rq, struct hinic_qp, rq);
 359         struct net_device *netdev = rxq->netdev;
 360         u64 pkt_len = 0, rx_bytes = 0;
 361         struct hinic_rq *rq = rxq->rq;
 362         struct hinic_rq_wqe *rq_wqe;
 363         struct hinic_dev *nic_dev;
 364         unsigned int free_wqebbs;
 365         struct hinic_rq_cqe *cqe;
 366         int num_wqes, pkts = 0;
 367         struct hinic_sge sge;
 368         unsigned int status;
 369         struct sk_buff *skb;
 370         u32 offload_type;
 371         u16 ci, num_lro;
 372         u16 num_wqe = 0;
 373         u32 vlan_len;
 374         u16 vid;
 375
 376         nic_dev = netdev_priv(netdev);
 377
 378         while (pkts < budget) {
 379                 num_wqes = 0;
 380
 381                 rq_wqe = hinic_rq_read_wqe(rxq->rq, HINIC_RQ_WQE_SIZE, &skb,
 382                                            &ci);
 383                 if (!rq_wqe)
 384                         break;
 385
 386                 /* make sure we read rx_done before packet length */
 387                 dma_rmb();
 388
 389                 cqe = rq->cqe[ci];
 390                 status =  be32_to_cpu(cqe->status);
 391                 hinic_rq_get_sge(rxq->rq, rq_wqe, ci, &sge);
 392
 393                 rx_unmap_skb(rxq, hinic_sge_to_dma(&sge));
 394
 395                 rx_csum(rxq, status, skb);
 396
 397                 prefetch(skb->data);
 398
 399                 pkt_len = sge.len;
 400
 401                 if (pkt_len <= HINIC_RX_BUF_SZ) {
 402                         __skb_put(skb, pkt_len);
 403                 } else {
 404                         __skb_put(skb, HINIC_RX_BUF_SZ);
 405                         num_wqes = rx_recv_jumbo_pkt(rxq, skb, pkt_len -
 406                                                      HINIC_RX_BUF_SZ, ci);
 407                 }
 408
 409                 hinic_rq_put_wqe(rq, ci,
 410                                  (num_wqes + 1) * HINIC_RQ_WQE_SIZE);
 411
 412                 offload_type = be32_to_cpu(cqe->offload_type);
 413                 vlan_len = be32_to_cpu(cqe->len);
 414                 if ((netdev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
 415                     HINIC_GET_RX_VLAN_OFFLOAD_EN(offload_type)) {
 416                         vid = HINIC_GET_RX_VLAN_TAG(vlan_len);
 417                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
 418                 }
 419
 420                 if (unlikely(nic_dev->flags & HINIC_LP_TEST))
 421                         hinic_copy_lp_data(nic_dev, skb);
 422
 423                 skb_record_rx_queue(skb, qp->q_id);
 424                 skb->protocol = eth_type_trans(skb, rxq->netdev);
 425
 426                 napi_gro_receive(&rxq->napi, skb);
 427
 428                 pkts++;
 429                 rx_bytes += pkt_len;
 430
 431                 num_lro = HINIC_GET_RX_NUM_LRO(status);
 432                 if (num_lro) {
 433                         rx_bytes += ((num_lro - 1) *
 434                                      LRO_PKT_HDR_LEN(cqe));
 435
 436                         num_wqe +=
 437                         (u16)(pkt_len >> rxq->rx_buff_shift) +
 438                         ((pkt_len & (rxq->buf_len - 1)) ? 1 : 0);
 439                 }
 440
 441                 cqe->status = 0;
 442
 443                 if (num_wqe >= LRO_REPLENISH_THLD)
 444                         break;
 445         }
 446
 447         free_wqebbs = hinic_get_rq_free_wqebbs(rxq->rq);
 448         if (free_wqebbs > HINIC_RX_BUFFER_WRITE)
 449                 rx_alloc_pkts(rxq);
 450
 451         u64_stats_update_begin(&rxq->rxq_stats.syncp);
 452         rxq->rxq_stats.pkts += pkts;
 453         rxq->rxq_stats.bytes += rx_bytes;
 454         u64_stats_update_end(&rxq->rxq_stats.syncp);
 455
 456         return pkts;
 457 }
 458
 459 static int rx_poll(struct napi_struct *napi, int budget)
 460 {
 461         struct hinic_rxq *rxq = container_of(napi, struct hinic_rxq, napi);
 462         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 463         struct hinic_rq *rq = rxq->rq;
 464         int pkts;
 465
 466         pkts = rxq_recv(rxq, budget);
 467         if (pkts >= budget)
 468                 return budget;
 469
 470         napi_complete(napi);
 471
 472         if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
 473                 hinic_hwdev_set_msix_state(nic_dev->hwdev,
 474                                            rq->msix_entry,
 475                                            HINIC_MSIX_ENABLE);
 476
 477         return pkts;
 478 }
 479
 480 static void rx_add_napi(struct hinic_rxq *rxq)
 481 {
 482         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 483
 484         netif_napi_add(rxq->netdev, &rxq->napi, rx_poll, nic_dev->rx_weight);
 485         napi_enable(&rxq->napi);
 486 }
 487
 488 static void rx_del_napi(struct hinic_rxq *rxq)
 489 {
 490         napi_disable(&rxq->napi);
 491         netif_napi_del(&rxq->napi);
 492 }
 493
 494 static irqreturn_t rx_irq(int irq, void *data)
 495 {
 496         struct hinic_rxq *rxq = (struct hinic_rxq *)data;
 497         struct hinic_rq *rq = rxq->rq;
 498         struct hinic_dev *nic_dev;
 499
 500         /* Disable the interrupt until napi will be completed */
 501         nic_dev = netdev_priv(rxq->netdev);
 502         if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
 503                 hinic_hwdev_set_msix_state(nic_dev->hwdev,
 504                                            rq->msix_entry,
 505                                            HINIC_MSIX_DISABLE);
 506
 507         nic_dev = netdev_priv(rxq->netdev);
 508         hinic_hwdev_msix_cnt_set(nic_dev->hwdev, rq->msix_entry);
 509
 510         napi_schedule(&rxq->napi);
 511         return IRQ_HANDLED;
 512 }
 513
 514 static int rx_request_irq(struct hinic_rxq *rxq)
 515 {
 516         struct hinic_dev *nic_dev = netdev_priv(rxq->netdev);
 517         struct hinic_msix_config interrupt_info = {0};
 518         struct hinic_intr_coal_info *intr_coal = NULL;
 519         struct hinic_hwdev *hwdev = nic_dev->hwdev;
 520         struct hinic_rq *rq = rxq->rq;
 521         struct hinic_qp *qp;
 522         int err;
 523
 524         qp = container_of(rq, struct hinic_qp, rq);
 525
 526         rx_add_napi(rxq);
 527
 528         hinic_hwdev_msix_set(hwdev, rq->msix_entry,
 529                              RX_IRQ_NO_PENDING, RX_IRQ_NO_COALESC,
 530                              RX_IRQ_NO_LLI_TIMER, RX_IRQ_NO_CREDIT,
 531                              RX_IRQ_NO_RESEND_TIMER);
 532
 533         intr_coal = &nic_dev->rx_intr_coalesce[qp->q_id];
 534         interrupt_info.msix_index = rq->msix_entry;
 535         interrupt_info.coalesce_timer_cnt = intr_coal->coalesce_timer_cfg;
 536         interrupt_info.pending_cnt = intr_coal->pending_limt;
 537         interrupt_info.resend_timer_cnt = intr_coal->resend_timer_cfg;
 538
 539         err = hinic_set_interrupt_cfg(hwdev, &interrupt_info);
 540         if (err) {
 541                 netif_err(nic_dev, drv, rxq->netdev,
 542                           "Failed to set RX interrupt coalescing attribute\n");
 543                 goto err_req_irq;
 544         }
 545
 546         err = request_irq(rq->irq, rx_irq, 0, rxq->irq_name, rxq);
 547         if (err)
 548                 goto err_req_irq;
 549
 550         cpumask_set_cpu(qp->q_id % num_online_cpus(), &rq->affinity_mask);
 551         err = irq_set_affinity_and_hint(rq->irq, &rq->affinity_mask);
 552         if (err)
 553                 goto err_irq_affinity;
 554
 555         return 0;
 556
 557 err_irq_affinity:
 558         free_irq(rq->irq, rxq);
 559 err_req_irq:
 560         rx_del_napi(rxq);
 561         return err;
 562 }
 563
 564 static void rx_free_irq(struct hinic_rxq *rxq)
 565 {
 566         struct hinic_rq *rq = rxq->rq;
 567
 568         irq_update_affinity_hint(rq->irq, NULL);
 569         free_irq(rq->irq, rxq);
 570         rx_del_napi(rxq);
 571 }
 572
 573 /**
 574  * hinic_init_rxq - Initialize the Rx Queue
 575  * @rxq: Logical Rx Queue
 576  * @rq: Hardware Rx Queue to connect the Logical queue with
 577  * @netdev: network device to connect the Logical queue with
 578  *
 579  * Return 0 - Success, negative - Failure
 580  **/
 581 int hinic_init_rxq(struct hinic_rxq *rxq, struct hinic_rq *rq,
 582                    struct net_device *netdev)
 583 {
 584         struct hinic_qp *qp = container_of(rq, struct hinic_qp, rq);
 585         int err, pkts;
 586
 587         rxq->netdev = netdev;
 588         rxq->rq = rq;
 589         rxq->buf_len = HINIC_RX_BUF_SZ;
 590         rxq->rx_buff_shift = ilog2(HINIC_RX_BUF_SZ);
 591
 592         rxq_stats_init(rxq);
 593
 594         rxq->irq_name = devm_kasprintf(&netdev->dev, GFP_KERNEL,
 595                                        "%s_rxq%d", netdev->name, qp->q_id);
 596         if (!rxq->irq_name)
 597                 return -ENOMEM;
 598
 599         pkts = rx_alloc_pkts(rxq);
 600         if (!pkts) {
 601                 err = -ENOMEM;
 602                 goto err_rx_pkts;
 603         }
 604
 605         err = rx_request_irq(rxq);
 606         if (err) {
 607                 netdev_err(netdev, "Failed to request Rx irq\n");
 608                 goto err_req_rx_irq;
 609         }
 610
 611         return 0;
 612
 613 err_req_rx_irq:
 614 err_rx_pkts:
 615         free_all_rx_skbs(rxq);
 616         devm_kfree(&netdev->dev, rxq->irq_name);
 617         return err;
 618 }
 619
 620 /**
 621  * hinic_clean_rxq - Clean the Rx Queue
 622  * @rxq: Logical Rx Queue
 623  **/
 624 void hinic_clean_rxq(struct hinic_rxq *rxq)
 625 {
 626         struct net_device *netdev = rxq->netdev;
 627
 628         rx_free_irq(rxq);
 629
 630         free_all_rx_skbs(rxq);
 631         devm_kfree(&netdev->dev, rxq->irq_name);
 632 }