drivers/net/bnxt/bnxt_rxq.c

   1 /* SPDX-License-Identifier: BSD-3-Clause
   2  * Copyright(c) 2014-2021 Broadcom
   3  * All rights reserved.
   4  */
   5
   6 #include <inttypes.h>
   7
   8 #include <rte_malloc.h>
   9
  10 #include "bnxt.h"
  11 #include "bnxt_filter.h"
  12 #include "bnxt_hwrm.h"
  13 #include "bnxt_ring.h"
  14 #include "bnxt_rxq.h"
  15 #include "bnxt_rxr.h"
  16 #include "bnxt_vnic.h"
  17 #include "hsi_struct_def_dpdk.h"
  18
  19 /*
  20  * RX Queues
  21  */
  22
  23 void bnxt_free_rxq_stats(struct bnxt_rx_queue *rxq)
  24 {
  25         if (rxq && rxq->cp_ring && rxq->cp_ring->hw_stats)
  26                 rxq->cp_ring->hw_stats = NULL;
  27 }
  28
  29 int bnxt_mq_rx_configure(struct bnxt *bp)
  30 {
  31         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
  32         const struct rte_eth_vmdq_rx_conf *conf =
  33                     &dev_conf->rx_adv_conf.vmdq_rx_conf;
  34         unsigned int i, j, nb_q_per_grp = 1, ring_idx = 0;
  35         int start_grp_id, end_grp_id = 1, rc = 0;
  36         struct bnxt_vnic_info *vnic;
  37         struct bnxt_filter_info *filter;
  38         enum rte_eth_nb_pools pools = 1, max_pools = 0;
  39         struct bnxt_rx_queue *rxq;
  40
  41         bp->nr_vnics = 0;
  42
  43         /* Single queue mode */
  44         if (bp->rx_cp_nr_rings < 2) {
  45                 vnic = &bp->vnic_info[0];
  46                 if (!vnic) {
  47                         PMD_DRV_LOG(ERR, "VNIC alloc failed\n");
  48                         rc = -ENOMEM;
  49                         goto err_out;
  50                 }
  51                 vnic->flags |= BNXT_VNIC_INFO_BCAST;
  52                 bp->nr_vnics++;
  53
  54                 rxq = bp->eth_dev->data->rx_queues[0];
  55                 rxq->vnic = vnic;
  56
  57                 vnic->func_default = true;
  58                 vnic->start_grp_id = 0;
  59                 vnic->end_grp_id = vnic->start_grp_id;
  60                 filter = bnxt_alloc_filter(bp);
  61                 if (!filter) {
  62                         PMD_DRV_LOG(ERR, "L2 filter alloc failed\n");
  63                         rc = -ENOMEM;
  64                         goto err_out;
  65                 }
  66                 filter->mac_index = 0;
  67                 filter->flags |= HWRM_CFA_L2_FILTER_ALLOC_INPUT_FLAGS_OUTERMOST;
  68                 STAILQ_INSERT_TAIL(&vnic->filter, filter, next);
  69                 goto out;
  70         }
  71
  72         /* Multi-queue mode */
  73         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_VMDQ_DCB_RSS) {
  74                 /* VMDq ONLY, VMDq+RSS, VMDq+DCB, VMDq+DCB+RSS */
  75
  76                 switch (dev_conf->rxmode.mq_mode) {
  77                 case ETH_MQ_RX_VMDQ_RSS:
  78                 case ETH_MQ_RX_VMDQ_ONLY:
  79                 case ETH_MQ_RX_VMDQ_DCB_RSS:
  80                         /* FALLTHROUGH */
  81                         /* ETH_8/64_POOLs */
  82                         pools = conf->nb_queue_pools;
  83                         /* For each pool, allocate MACVLAN CFA rule & VNIC */
  84                         max_pools = RTE_MIN(bp->max_vnics,
  85                                             RTE_MIN(bp->max_l2_ctx,
  86                                             RTE_MIN(bp->max_rsscos_ctx,
  87                                                     ETH_64_POOLS)));
  88                         PMD_DRV_LOG(DEBUG,
  89                                     "pools = %u max_pools = %u\n",
  90                                     pools, max_pools);
  91                         if (pools > max_pools)
  92                                 pools = max_pools;
  93                         break;
  94                 case ETH_MQ_RX_RSS:
  95                         pools = bp->rx_cosq_cnt ? bp->rx_cosq_cnt : 1;
  96                         break;
  97                 default:
  98                         PMD_DRV_LOG(ERR, "Unsupported mq_mod %d\n",
  99                                 dev_conf->rxmode.mq_mode);
 100                         rc = -EINVAL;
 101                         goto err_out;
 102                 }
 103         } else if (!dev_conf->rxmode.mq_mode) {
 104                 pools = bp->rx_cosq_cnt ? bp->rx_cosq_cnt : pools;
 105         }
 106
 107         pools = RTE_MIN(pools, bp->rx_cp_nr_rings);
 108         nb_q_per_grp = bp->rx_cp_nr_rings / pools;
 109         PMD_DRV_LOG(DEBUG, "pools = %u nb_q_per_grp = %u\n",
 110                     pools, nb_q_per_grp);
 111         start_grp_id = 0;
 112         end_grp_id = nb_q_per_grp;
 113
 114         for (i = 0; i < pools; i++) {
 115                 vnic = &bp->vnic_info[i];
 116                 if (!vnic) {
 117                         PMD_DRV_LOG(ERR, "VNIC alloc failed\n");
 118                         rc = -ENOMEM;
 119                         goto err_out;
 120                 }
 121                 vnic->flags |= BNXT_VNIC_INFO_BCAST;
 122                 bp->nr_vnics++;
 123
 124                 for (j = 0; j < nb_q_per_grp; j++, ring_idx++) {
 125                         rxq = bp->eth_dev->data->rx_queues[ring_idx];
 126                         rxq->vnic = vnic;
 127                         PMD_DRV_LOG(DEBUG,
 128                                     "rxq[%d] = %p vnic[%d] = %p\n",
 129                                     ring_idx, rxq, i, vnic);
 130                 }
 131                 if (i == 0) {
 132                         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_VMDQ_DCB) {
 133                                 bp->eth_dev->data->promiscuous = 1;
 134                                 vnic->flags |= BNXT_VNIC_INFO_PROMISC;
 135                         }
 136                         vnic->func_default = true;
 137                 }
 138                 vnic->start_grp_id = start_grp_id;
 139                 vnic->end_grp_id = end_grp_id;
 140
 141                 if (i) {
 142                         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_VMDQ_DCB ||
 143                             !(dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS))
 144                                 vnic->rss_dflt_cr = true;
 145                         goto skip_filter_allocation;
 146                 }
 147                 filter = bnxt_alloc_filter(bp);
 148                 if (!filter) {
 149                         PMD_DRV_LOG(ERR, "L2 filter alloc failed\n");
 150                         rc = -ENOMEM;
 151                         goto err_out;
 152                 }
 153                 filter->mac_index = 0;
 154                 filter->flags |= HWRM_CFA_L2_FILTER_ALLOC_INPUT_FLAGS_OUTERMOST;
 155                 /*
 156                  * TODO: Configure & associate CFA rule for
 157                  * each VNIC for each VMDq with MACVLAN, MACVLAN+TC
 158                  */
 159                 STAILQ_INSERT_TAIL(&vnic->filter, filter, next);
 160
 161 skip_filter_allocation:
 162                 start_grp_id = end_grp_id;
 163                 end_grp_id += nb_q_per_grp;
 164         }
 165
 166 out:
 167         bp->rx_num_qs_per_vnic = nb_q_per_grp;
 168
 169         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) {
 170                 struct rte_eth_rss_conf *rss = &dev_conf->rx_adv_conf.rss_conf;
 171
 172                 if (bp->flags & BNXT_FLAG_UPDATE_HASH)
 173                         bp->flags &= ~BNXT_FLAG_UPDATE_HASH;
 174
 175                 for (i = 0; i < bp->nr_vnics; i++) {
 176                         uint32_t lvl = ETH_RSS_LEVEL(rss->rss_hf);
 177
 178                         vnic = &bp->vnic_info[i];
 179                         vnic->hash_type =
 180                                 bnxt_rte_to_hwrm_hash_types(rss->rss_hf);
 181                         vnic->hash_mode =
 182                                 bnxt_rte_to_hwrm_hash_level(bp,
 183                                                             rss->rss_hf,
 184                                                             lvl);
 185
 186                         /*
 187                          * Use the supplied key if the key length is
 188                          * acceptable and the rss_key is not NULL
 189                          */
 190                         if (rss->rss_key &&
 191                             rss->rss_key_len <= HW_HASH_KEY_SIZE)
 192                                 memcpy(vnic->rss_hash_key,
 193                                        rss->rss_key, rss->rss_key_len);
 194                 }
 195         }
 196
 197         return rc;
 198
 199 err_out:
 200         /* Free allocated vnic/filters */
 201
 202         return rc;
 203 }
 204
 205 void bnxt_rx_queue_release_mbufs(struct bnxt_rx_queue *rxq)
 206 {
 207         struct rte_mbuf **sw_ring;
 208         struct bnxt_tpa_info *tpa_info;
 209         uint16_t i;
 210
 211         if (!rxq || !rxq->rx_ring)
 212                 return;
 213
 214         sw_ring = rxq->rx_ring->rx_buf_ring;
 215         if (sw_ring) {
 216                 for (i = 0;
 217                      i < rxq->rx_ring->rx_ring_struct->ring_size; i++) {
 218                         if (sw_ring[i]) {
 219                                 if (sw_ring[i] != &rxq->fake_mbuf)
 220                                         rte_pktmbuf_free_seg(sw_ring[i]);
 221                                 sw_ring[i] = NULL;
 222                         }
 223                 }
 224         }
 225         /* Free up mbufs in Agg ring */
 226         sw_ring = rxq->rx_ring->ag_buf_ring;
 227         if (sw_ring) {
 228                 for (i = 0;
 229                      i < rxq->rx_ring->ag_ring_struct->ring_size; i++) {
 230                         if (sw_ring[i]) {
 231                                 rte_pktmbuf_free_seg(sw_ring[i]);
 232                                 sw_ring[i] = NULL;
 233                         }
 234                 }
 235         }
 236
 237         /* Free up mbufs in TPA */
 238         tpa_info = rxq->rx_ring->tpa_info;
 239         if (tpa_info) {
 240                 int max_aggs = BNXT_TPA_MAX_AGGS(rxq->bp);
 241
 242                 for (i = 0; i < max_aggs; i++) {
 243                         if (tpa_info[i].mbuf) {
 244                                 rte_pktmbuf_free_seg(tpa_info[i].mbuf);
 245                                 tpa_info[i].mbuf = NULL;
 246                         }
 247                 }
 248         }
 249
 250 }
 251
 252 void bnxt_free_rx_mbufs(struct bnxt *bp)
 253 {
 254         struct bnxt_rx_queue *rxq;
 255         int i;
 256
 257         for (i = 0; i < (int)bp->rx_nr_rings; i++) {
 258                 rxq = bp->rx_queues[i];
 259                 bnxt_rx_queue_release_mbufs(rxq);
 260         }
 261 }
 262
 263 void bnxt_rx_queue_release_op(void *rx_queue)
 264 {
 265         struct bnxt_rx_queue *rxq = (struct bnxt_rx_queue *)rx_queue;
 266
 267         if (rxq) {
 268                 if (is_bnxt_in_error(rxq->bp))
 269                         return;
 270
 271                 bnxt_rx_queue_release_mbufs(rxq);
 272
 273                 /* Free RX ring hardware descriptors */
 274                 if (rxq->rx_ring) {
 275                         bnxt_free_ring(rxq->rx_ring->rx_ring_struct);
 276                         rte_free(rxq->rx_ring->rx_ring_struct);
 277                         /* Free RX Agg ring hardware descriptors */
 278                         bnxt_free_ring(rxq->rx_ring->ag_ring_struct);
 279                         rte_free(rxq->rx_ring->ag_ring_struct);
 280
 281                         rte_free(rxq->rx_ring);
 282                 }
 283                 /* Free RX completion ring hardware descriptors */
 284                 if (rxq->cp_ring) {
 285                         bnxt_free_ring(rxq->cp_ring->cp_ring_struct);
 286                         rte_free(rxq->cp_ring->cp_ring_struct);
 287                         rte_free(rxq->cp_ring);
 288                 }
 289
 290                 bnxt_free_rxq_stats(rxq);
 291                 rte_memzone_free(rxq->mz);
 292                 rxq->mz = NULL;
 293
 294                 rte_free(rxq);
 295         }
 296 }
 297
 298 int bnxt_rx_queue_setup_op(struct rte_eth_dev *eth_dev,
 299                                uint16_t queue_idx,
 300                                uint16_t nb_desc,
 301                                unsigned int socket_id,
 302                                const struct rte_eth_rxconf *rx_conf,
 303                                struct rte_mempool *mp)
 304 {
 305         struct bnxt *bp = eth_dev->data->dev_private;
 306         uint64_t rx_offloads = eth_dev->data->dev_conf.rxmode.offloads;
 307         struct bnxt_rx_queue *rxq;
 308         int rc = 0;
 309         uint8_t queue_state;
 310
 311         rc = is_bnxt_in_error(bp);
 312         if (rc)
 313                 return rc;
 314
 315         if (queue_idx >= bnxt_max_rings(bp)) {
 316                 PMD_DRV_LOG(ERR,
 317                         "Cannot create Rx ring %d. Only %d rings available\n",
 318                         queue_idx, bp->max_rx_rings);
 319                 return -EINVAL;
 320         }
 321
 322         if (nb_desc < BNXT_MIN_RING_DESC || nb_desc > MAX_RX_DESC_CNT) {
 323                 PMD_DRV_LOG(ERR, "nb_desc %d is invalid\n", nb_desc);
 324                 return -EINVAL;
 325         }
 326
 327         if (eth_dev->data->rx_queues) {
 328                 rxq = eth_dev->data->rx_queues[queue_idx];
 329                 if (rxq)
 330                         bnxt_rx_queue_release_op(rxq);
 331         }
 332         rxq = rte_zmalloc_socket("bnxt_rx_queue", sizeof(struct bnxt_rx_queue),
 333                                  RTE_CACHE_LINE_SIZE, socket_id);
 334         if (!rxq) {
 335                 PMD_DRV_LOG(ERR, "bnxt_rx_queue allocation failed!\n");
 336                 return -ENOMEM;
 337         }
 338         rxq->bp = bp;
 339         rxq->mb_pool = mp;
 340         rxq->nb_rx_desc = nb_desc;
 341         rxq->rx_free_thresh =
 342                 RTE_MIN(rte_align32pow2(nb_desc) / 4, RTE_BNXT_MAX_RX_BURST);
 343
 344         if (rx_conf->rx_drop_en != BNXT_DEFAULT_RX_DROP_EN)
 345                 PMD_DRV_LOG(NOTICE,
 346                             "Per-queue config of drop-en is not supported.\n");
 347         rxq->drop_en = BNXT_DEFAULT_RX_DROP_EN;
 348
 349         PMD_DRV_LOG(DEBUG, "RX Buf MTU %d\n", eth_dev->data->mtu);
 350
 351         rc = bnxt_init_rx_ring_struct(rxq, socket_id);
 352         if (rc) {
 353                 PMD_DRV_LOG(ERR,
 354                             "init_rx_ring_struct failed!\n");
 355                 goto err;
 356         }
 357
 358         PMD_DRV_LOG(DEBUG, "RX Buf size is %d\n", rxq->rx_buf_size);
 359         rxq->queue_id = queue_idx;
 360         rxq->port_id = eth_dev->data->port_id;
 361         if (rx_offloads & DEV_RX_OFFLOAD_KEEP_CRC)
 362                 rxq->crc_len = RTE_ETHER_CRC_LEN;
 363         else
 364                 rxq->crc_len = 0;
 365
 366         eth_dev->data->rx_queues[queue_idx] = rxq;
 367         /* Allocate RX ring hardware descriptors */
 368         rc = bnxt_alloc_rings(bp, queue_idx, NULL, rxq, rxq->cp_ring, NULL,
 369                              "rxr");
 370         if (rc) {
 371                 PMD_DRV_LOG(ERR,
 372                             "ring_dma_zone_reserve for rx_ring failed!\n");
 373                 goto err;
 374         }
 375         rte_atomic64_init(&rxq->rx_mbuf_alloc_fail);
 376
 377         /* rxq 0 must not be stopped when used as async CPR */
 378         if (!BNXT_NUM_ASYNC_CPR(bp) && queue_idx == 0)
 379                 rxq->rx_deferred_start = false;
 380         else
 381                 rxq->rx_deferred_start = rx_conf->rx_deferred_start;
 382
 383         if (rxq->rx_deferred_start) {
 384                 queue_state = RTE_ETH_QUEUE_STATE_STOPPED;
 385                 rxq->rx_started = false;
 386         } else {
 387                 queue_state = RTE_ETH_QUEUE_STATE_STARTED;
 388                 rxq->rx_started = true;
 389         }
 390         eth_dev->data->rx_queue_state[queue_idx] = queue_state;
 391
 392         /* Configure mtu if it is different from what was configured before */
 393         if (!queue_idx)
 394                 bnxt_mtu_set_op(eth_dev, eth_dev->data->mtu);
 395
 396         return 0;
 397 err:
 398         bnxt_rx_queue_release_op(rxq);
 399         return rc;
 400 }
 401
 402 int
 403 bnxt_rx_queue_intr_enable_op(struct rte_eth_dev *eth_dev, uint16_t queue_id)
 404 {
 405         struct bnxt *bp = eth_dev->data->dev_private;
 406         struct bnxt_rx_queue *rxq;
 407         struct bnxt_cp_ring_info *cpr;
 408         int rc = 0;
 409
 410         rc = is_bnxt_in_error(bp);
 411         if (rc)
 412                 return rc;
 413
 414         if (eth_dev->data->rx_queues) {
 415                 rxq = eth_dev->data->rx_queues[queue_id];
 416                 if (!rxq)
 417                         return -EINVAL;
 418
 419                 cpr = rxq->cp_ring;
 420                 B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
 421         }
 422         return rc;
 423 }
 424
 425 int
 426 bnxt_rx_queue_intr_disable_op(struct rte_eth_dev *eth_dev, uint16_t queue_id)
 427 {
 428         struct bnxt *bp = eth_dev->data->dev_private;
 429         struct bnxt_rx_queue *rxq;
 430         struct bnxt_cp_ring_info *cpr;
 431         int rc = 0;
 432
 433         rc = is_bnxt_in_error(bp);
 434         if (rc)
 435                 return rc;
 436
 437         if (eth_dev->data->rx_queues) {
 438                 rxq = eth_dev->data->rx_queues[queue_id];
 439                 if (!rxq)
 440                         return -EINVAL;
 441
 442                 cpr = rxq->cp_ring;
 443                 B_CP_DB_DISARM(cpr);
 444         }
 445         return rc;
 446 }
 447
 448 int bnxt_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 449 {
 450         struct bnxt *bp = dev->data->dev_private;
 451         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
 452         struct bnxt_rx_queue *rxq = bp->rx_queues[rx_queue_id];
 453         struct bnxt_vnic_info *vnic = NULL;
 454         int rc = 0;
 455
 456         rc = is_bnxt_in_error(bp);
 457         if (rc)
 458                 return rc;
 459
 460         if (rxq == NULL) {
 461                 PMD_DRV_LOG(ERR, "Invalid Rx queue %d\n", rx_queue_id);
 462                 return -EINVAL;
 463         }
 464
 465         /* Set the queue state to started here.
 466          * We check the status of the queue while posting buffer.
 467          * If queue is it started, we do not post buffers for Rx.
 468          */
 469         rxq->rx_started = true;
 470         dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 471
 472         bnxt_free_hwrm_rx_ring(bp, rx_queue_id);
 473         rc = bnxt_alloc_hwrm_rx_ring(bp, rx_queue_id);
 474         if (rc)
 475                 return rc;
 476
 477         if (BNXT_CHIP_P5(bp)) {
 478                 /* Reconfigure default receive ring and MRU. */
 479                 bnxt_hwrm_vnic_cfg(bp, rxq->vnic);
 480         }
 481         PMD_DRV_LOG(INFO, "Rx queue started %d\n", rx_queue_id);
 482
 483         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) {
 484                 vnic = rxq->vnic;
 485
 486                 if (BNXT_HAS_RING_GRPS(bp)) {
 487                         if (vnic->fw_grp_ids[rx_queue_id] != INVALID_HW_RING_ID)
 488                                 return 0;
 489
 490                         vnic->fw_grp_ids[rx_queue_id] =
 491                                         bp->grp_info[rx_queue_id].fw_grp_id;
 492                         PMD_DRV_LOG(DEBUG,
 493                                     "vnic = %p fw_grp_id = %d\n",
 494                                     vnic, bp->grp_info[rx_queue_id].fw_grp_id);
 495                 }
 496
 497                 PMD_DRV_LOG(DEBUG, "Rx Queue Count %d\n", vnic->rx_queue_cnt);
 498                 rc = bnxt_vnic_rss_configure(bp, vnic);
 499         }
 500
 501         if (rc != 0) {
 502                 dev->data->rx_queue_state[rx_queue_id] =
 503                                 RTE_ETH_QUEUE_STATE_STOPPED;
 504                 rxq->rx_started = false;
 505         }
 506
 507         PMD_DRV_LOG(INFO,
 508                     "queue %d, rx_deferred_start %d, state %d!\n",
 509                     rx_queue_id, rxq->rx_deferred_start,
 510                     bp->eth_dev->data->rx_queue_state[rx_queue_id]);
 511
 512         return rc;
 513 }
 514
 515 int bnxt_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 516 {
 517         struct bnxt *bp = dev->data->dev_private;
 518         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
 519         struct bnxt_vnic_info *vnic = NULL;
 520         struct bnxt_rx_queue *rxq = NULL;
 521         int active_queue_cnt = 0;
 522         int i, rc = 0;
 523
 524         rc = is_bnxt_in_error(bp);
 525         if (rc)
 526                 return rc;
 527
 528         /* For the stingray platform and other platforms needing tighter
 529          * control of resource utilization, Rx CQ 0 also works as
 530          * Default CQ for async notifications
 531          */
 532         if (!BNXT_NUM_ASYNC_CPR(bp) && !rx_queue_id) {
 533                 PMD_DRV_LOG(ERR, "Cannot stop Rx queue id %d\n", rx_queue_id);
 534                 return -EINVAL;
 535         }
 536
 537         rxq = bp->rx_queues[rx_queue_id];
 538         if (!rxq) {
 539                 PMD_DRV_LOG(ERR, "Invalid Rx queue %d\n", rx_queue_id);
 540                 return -EINVAL;
 541         }
 542
 543         vnic = rxq->vnic;
 544         if (!vnic) {
 545                 PMD_DRV_LOG(ERR, "VNIC not initialized for RxQ %d\n",
 546                             rx_queue_id);
 547                 return -EINVAL;
 548         }
 549
 550         dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 551         rxq->rx_started = false;
 552         PMD_DRV_LOG(DEBUG, "Rx queue stopped\n");
 553
 554         if (dev_conf->rxmode.mq_mode & ETH_MQ_RX_RSS_FLAG) {
 555                 if (BNXT_HAS_RING_GRPS(bp))
 556                         vnic->fw_grp_ids[rx_queue_id] = INVALID_HW_RING_ID;
 557
 558                 PMD_DRV_LOG(DEBUG, "Rx Queue Count %d\n", vnic->rx_queue_cnt);
 559                 rc = bnxt_vnic_rss_configure(bp, vnic);
 560         }
 561
 562         /* Compute current number of active receive queues. */
 563         for (i = vnic->start_grp_id; i < vnic->end_grp_id; i++)
 564                 if (bp->rx_queues[i]->rx_started)
 565                         active_queue_cnt++;
 566
 567         if (BNXT_CHIP_P5(bp)) {
 568                 /*
 569                  * For Thor, we need to ensure that the VNIC default receive
 570                  * ring corresponds to an active receive queue. When no queue
 571                  * is active, we need to temporarily set the MRU to zero so
 572                  * that packets are dropped early in the receive pipeline in
 573                  * order to prevent the VNIC default receive ring from being
 574                  * accessed.
 575                  */
 576                 if (active_queue_cnt == 0) {
 577                         uint16_t saved_mru = vnic->mru;
 578
 579                         vnic->mru = 0;
 580                         /* Reconfigure default receive ring and MRU. */
 581                         bnxt_hwrm_vnic_cfg(bp, vnic);
 582                         vnic->mru = saved_mru;
 583                 } else {
 584                         /* Reconfigure default receive ring. */
 585                         bnxt_hwrm_vnic_cfg(bp, vnic);
 586                 }
 587         } else if (active_queue_cnt) {
 588                 /*
 589                  * If the queue being stopped is the current default queue and
 590                  * there are other active queues, pick one of them as the
 591                  * default and reconfigure the vnic.
 592                  */
 593                 if (vnic->dflt_ring_grp == bp->grp_info[rx_queue_id].fw_grp_id) {
 594                         for (i = vnic->start_grp_id; i < vnic->end_grp_id; i++) {
 595                                 if (bp->rx_queues[i]->rx_started) {
 596                                         vnic->dflt_ring_grp =
 597                                                 bp->grp_info[i].fw_grp_id;
 598                                         bnxt_hwrm_vnic_cfg(bp, vnic);
 599                                         break;
 600                                 }
 601                         }
 602                 }
 603         }
 604
 605         if (rc == 0)
 606                 bnxt_rx_queue_release_mbufs(rxq);
 607
 608         return rc;
 609 }