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 uint64_t bnxt_get_rx_port_offloads(struct bnxt *bp)
  24 {
  25         uint64_t rx_offload_capa;
  26
  27         rx_offload_capa = RTE_ETH_RX_OFFLOAD_IPV4_CKSUM  |
  28                           RTE_ETH_RX_OFFLOAD_UDP_CKSUM   |
  29                           RTE_ETH_RX_OFFLOAD_TCP_CKSUM   |
  30                           RTE_ETH_RX_OFFLOAD_KEEP_CRC    |
  31                           RTE_ETH_RX_OFFLOAD_VLAN_FILTER |
  32                           RTE_ETH_RX_OFFLOAD_VLAN_EXTEND |
  33                           RTE_ETH_RX_OFFLOAD_TCP_LRO |
  34                           RTE_ETH_RX_OFFLOAD_SCATTER |
  35                           RTE_ETH_RX_OFFLOAD_RSS_HASH;
  36
  37         if (bp->flags & BNXT_FLAG_PTP_SUPPORTED)
  38                 rx_offload_capa |= RTE_ETH_RX_OFFLOAD_TIMESTAMP;
  39         if (bp->vnic_cap_flags & BNXT_VNIC_CAP_VLAN_RX_STRIP)
  40                 rx_offload_capa |= RTE_ETH_RX_OFFLOAD_VLAN_STRIP;
  41
  42         if (BNXT_TUNNELED_OFFLOADS_CAP_ALL_EN(bp))
  43                 rx_offload_capa |= RTE_ETH_RX_OFFLOAD_OUTER_IPV4_CKSUM |
  44                                         RTE_ETH_RX_OFFLOAD_OUTER_UDP_CKSUM;
  45
  46         return rx_offload_capa;
  47 }
  48
  49 /* Determine whether the current configuration needs aggregation ring in HW. */
  50 int bnxt_need_agg_ring(struct rte_eth_dev *eth_dev)
  51 {
  52         /* scattered_rx will be true if OFFLOAD_SCATTER is enabled,
  53          * if LRO is enabled, or if the max packet len is greater than the
  54          * mbuf data size. So AGG ring will be needed whenever scattered_rx
  55          * is set.
  56          */
  57         return eth_dev->data->scattered_rx ? 1 : 0;
  58 }
  59
  60 void bnxt_free_rxq_stats(struct bnxt_rx_queue *rxq)
  61 {
  62         if (rxq && rxq->cp_ring && rxq->cp_ring->hw_stats)
  63                 rxq->cp_ring->hw_stats = NULL;
  64 }
  65
  66 int bnxt_mq_rx_configure(struct bnxt *bp)
  67 {
  68         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
  69         struct rte_eth_rss_conf *rss = &bp->rss_conf;
  70         const struct rte_eth_vmdq_rx_conf *conf =
  71                     &dev_conf->rx_adv_conf.vmdq_rx_conf;
  72         unsigned int i, j, nb_q_per_grp = 1, ring_idx = 0;
  73         int start_grp_id, end_grp_id = 1, rc = 0;
  74         struct bnxt_vnic_info *vnic;
  75         struct bnxt_filter_info *filter;
  76         enum rte_eth_nb_pools pools = 1, max_pools = 0;
  77         struct bnxt_rx_queue *rxq;
  78
  79         bp->nr_vnics = 0;
  80
  81         /* Multi-queue mode */
  82         if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_DCB_RSS) {
  83                 /* VMDq ONLY, VMDq+RSS, VMDq+DCB, VMDq+DCB+RSS */
  84
  85                 switch (dev_conf->rxmode.mq_mode) {
  86                 case RTE_ETH_MQ_RX_VMDQ_RSS:
  87                 case RTE_ETH_MQ_RX_VMDQ_ONLY:
  88                 case RTE_ETH_MQ_RX_VMDQ_DCB_RSS:
  89                         /* FALLTHROUGH */
  90                         /* ETH_8/64_POOLs */
  91                         pools = conf->nb_queue_pools;
  92                         /* For each pool, allocate MACVLAN CFA rule & VNIC */
  93                         max_pools = RTE_MIN(bp->max_vnics,
  94                                             RTE_MIN(bp->max_l2_ctx,
  95                                             RTE_MIN(bp->max_rsscos_ctx,
  96                                                     RTE_ETH_64_POOLS)));
  97                         PMD_DRV_LOG(DEBUG,
  98                                     "pools = %u max_pools = %u\n",
  99                                     pools, max_pools);
 100                         if (pools > max_pools)
 101                                 pools = max_pools;
 102                         break;
 103                 case RTE_ETH_MQ_RX_RSS:
 104                         pools = bp->rx_cosq_cnt ? bp->rx_cosq_cnt : 1;
 105                         break;
 106                 default:
 107                         PMD_DRV_LOG(ERR, "Unsupported mq_mod %d\n",
 108                                 dev_conf->rxmode.mq_mode);
 109                         rc = -EINVAL;
 110                         goto err_out;
 111                 }
 112         } else if (!dev_conf->rxmode.mq_mode) {
 113                 pools = bp->rx_cosq_cnt ? bp->rx_cosq_cnt : pools;
 114         }
 115
 116         pools = RTE_MIN(pools, bp->rx_cp_nr_rings);
 117         nb_q_per_grp = bp->rx_cp_nr_rings / pools;
 118         PMD_DRV_LOG(DEBUG, "pools = %u nb_q_per_grp = %u\n",
 119                     pools, nb_q_per_grp);
 120         start_grp_id = 0;
 121         end_grp_id = nb_q_per_grp;
 122
 123         for (i = 0; i < pools; i++) {
 124                 vnic = &bp->vnic_info[i];
 125                 if (!vnic) {
 126                         PMD_DRV_LOG(ERR, "VNIC alloc failed\n");
 127                         rc = -ENOMEM;
 128                         goto err_out;
 129                 }
 130                 vnic->flags |= BNXT_VNIC_INFO_BCAST;
 131                 bp->nr_vnics++;
 132
 133                 for (j = 0; j < nb_q_per_grp; j++, ring_idx++) {
 134                         rxq = bp->eth_dev->data->rx_queues[ring_idx];
 135                         rxq->vnic = vnic;
 136                         PMD_DRV_LOG(DEBUG,
 137                                     "rxq[%d] = %p vnic[%d] = %p\n",
 138                                     ring_idx, rxq, i, vnic);
 139                 }
 140                 if (i == 0) {
 141                         if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_DCB) {
 142                                 bp->eth_dev->data->promiscuous = 1;
 143                                 vnic->flags |= BNXT_VNIC_INFO_PROMISC;
 144                         }
 145                         vnic->func_default = true;
 146                 }
 147                 vnic->start_grp_id = start_grp_id;
 148                 vnic->end_grp_id = end_grp_id;
 149
 150                 if (i) {
 151                         if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_VMDQ_DCB ||
 152                             !(dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_RSS))
 153                                 vnic->rss_dflt_cr = true;
 154                         goto skip_filter_allocation;
 155                 }
 156                 filter = bnxt_alloc_filter(bp);
 157                 if (!filter) {
 158                         PMD_DRV_LOG(ERR, "L2 filter alloc failed\n");
 159                         rc = -ENOMEM;
 160                         goto err_out;
 161                 }
 162                 filter->mac_index = 0;
 163                 filter->flags |= HWRM_CFA_L2_FILTER_ALLOC_INPUT_FLAGS_OUTERMOST;
 164                 /*
 165                  * TODO: Configure & associate CFA rule for
 166                  * each VNIC for each VMDq with MACVLAN, MACVLAN+TC
 167                  */
 168                 STAILQ_INSERT_TAIL(&vnic->filter, filter, next);
 169
 170 skip_filter_allocation:
 171                 start_grp_id = end_grp_id;
 172                 end_grp_id += nb_q_per_grp;
 173         }
 174
 175         bp->rx_num_qs_per_vnic = nb_q_per_grp;
 176
 177         for (i = 0; i < bp->nr_vnics; i++) {
 178                 uint32_t lvl = RTE_ETH_RSS_LEVEL(rss->rss_hf);
 179
 180                 vnic = &bp->vnic_info[i];
 181                 vnic->hash_type = bnxt_rte_to_hwrm_hash_types(rss->rss_hf);
 182                 vnic->hash_mode = bnxt_rte_to_hwrm_hash_level(bp, rss->rss_hf, lvl);
 183
 184                 /*
 185                  * Use the supplied key if the key length is
 186                  * acceptable and the rss_key is not NULL
 187                  */
 188                 if (rss->rss_key && rss->rss_key_len <= HW_HASH_KEY_SIZE)
 189                         memcpy(vnic->rss_hash_key, rss->rss_key, rss->rss_key_len);
 190         }
 191
 192         return rc;
 193
 194 err_out:
 195         /* Free allocated vnic/filters */
 196
 197         return rc;
 198 }
 199
 200 void bnxt_rx_queue_release_mbufs(struct bnxt_rx_queue *rxq)
 201 {
 202         struct rte_mbuf **sw_ring;
 203         struct bnxt_tpa_info *tpa_info;
 204         uint16_t i;
 205
 206         if (!rxq || !rxq->rx_ring)
 207                 return;
 208
 209         sw_ring = rxq->rx_ring->rx_buf_ring;
 210         if (sw_ring) {
 211 #if defined(RTE_ARCH_X86) || defined(RTE_ARCH_ARM64)
 212                 /*
 213                  * The vector receive burst function does not set used
 214                  * mbuf pointers to NULL, do that here to simplify
 215                  * cleanup logic.
 216                  */
 217                 for (i = 0; i < rxq->rxrearm_nb; i++)
 218                         sw_ring[rxq->rxrearm_start + i] = NULL;
 219                 rxq->rxrearm_nb = 0;
 220 #endif
 221                 for (i = 0;
 222                      i < rxq->rx_ring->rx_ring_struct->ring_size; i++) {
 223                         if (sw_ring[i]) {
 224                                 if (sw_ring[i] != &rxq->fake_mbuf)
 225                                         rte_pktmbuf_free_seg(sw_ring[i]);
 226                                 sw_ring[i] = NULL;
 227                         }
 228                 }
 229         }
 230         /* Free up mbufs in Agg ring */
 231         if (rxq->bp == NULL ||
 232             rxq->bp->eth_dev == NULL ||
 233             !bnxt_need_agg_ring(rxq->bp->eth_dev))
 234                 return;
 235
 236         sw_ring = rxq->rx_ring->ag_buf_ring;
 237         if (sw_ring) {
 238                 for (i = 0;
 239                      i < rxq->rx_ring->ag_ring_struct->ring_size; i++) {
 240                         if (sw_ring[i]) {
 241                                 rte_pktmbuf_free_seg(sw_ring[i]);
 242                                 sw_ring[i] = NULL;
 243                         }
 244                 }
 245         }
 246
 247         /* Free up mbufs in TPA */
 248         tpa_info = rxq->rx_ring->tpa_info;
 249         if (tpa_info) {
 250                 int max_aggs = BNXT_TPA_MAX_AGGS(rxq->bp);
 251
 252                 for (i = 0; i < max_aggs; i++) {
 253                         if (tpa_info[i].mbuf) {
 254                                 rte_pktmbuf_free_seg(tpa_info[i].mbuf);
 255                                 tpa_info[i].mbuf = NULL;
 256                         }
 257                 }
 258         }
 259
 260 }
 261
 262 void bnxt_free_rx_mbufs(struct bnxt *bp)
 263 {
 264         struct bnxt_rx_queue *rxq;
 265         int i;
 266
 267         for (i = 0; i < (int)bp->rx_nr_rings; i++) {
 268                 rxq = bp->rx_queues[i];
 269                 bnxt_rx_queue_release_mbufs(rxq);
 270         }
 271 }
 272
 273 void bnxt_free_rxq_mem(struct bnxt_rx_queue *rxq)
 274 {
 275         bnxt_rx_queue_release_mbufs(rxq);
 276
 277         /* Free RX, AGG ring hardware descriptors */
 278         if (rxq->rx_ring) {
 279                 bnxt_free_ring(rxq->rx_ring->rx_ring_struct);
 280                 rte_free(rxq->rx_ring->rx_ring_struct);
 281                 rxq->rx_ring->rx_ring_struct = NULL;
 282                 /* Free RX Agg ring hardware descriptors */
 283                 bnxt_free_ring(rxq->rx_ring->ag_ring_struct);
 284                 rte_free(rxq->rx_ring->ag_ring_struct);
 285                 rxq->rx_ring->ag_ring_struct = NULL;
 286
 287                 rte_free(rxq->rx_ring);
 288                 rxq->rx_ring = NULL;
 289         }
 290         /* Free RX completion ring hardware descriptors */
 291         if (rxq->cp_ring) {
 292                 bnxt_free_ring(rxq->cp_ring->cp_ring_struct);
 293                 rte_free(rxq->cp_ring->cp_ring_struct);
 294                 rxq->cp_ring->cp_ring_struct = NULL;
 295                 rte_free(rxq->cp_ring);
 296                 rxq->cp_ring = NULL;
 297         }
 298
 299         bnxt_free_rxq_stats(rxq);
 300         rte_memzone_free(rxq->mz);
 301         rxq->mz = NULL;
 302 }
 303
 304 void bnxt_rx_queue_release_op(struct rte_eth_dev *dev, uint16_t queue_idx)
 305 {
 306         struct bnxt_rx_queue *rxq = dev->data->rx_queues[queue_idx];
 307
 308         if (rxq != NULL) {
 309                 if (is_bnxt_in_error(rxq->bp))
 310                         return;
 311
 312                 bnxt_free_hwrm_rx_ring(rxq->bp, rxq->queue_id);
 313                 bnxt_free_rxq_mem(rxq);
 314                 rte_free(rxq);
 315         }
 316 }
 317
 318 int bnxt_rx_queue_setup_op(struct rte_eth_dev *eth_dev,
 319                                uint16_t queue_idx,
 320                                uint16_t nb_desc,
 321                                unsigned int socket_id,
 322                                const struct rte_eth_rxconf *rx_conf,
 323                                struct rte_mempool *mp)
 324 {
 325         struct bnxt *bp = eth_dev->data->dev_private;
 326         uint64_t rx_offloads = eth_dev->data->dev_conf.rxmode.offloads;
 327         struct bnxt_rx_queue *rxq;
 328         int rc = 0;
 329
 330         rc = is_bnxt_in_error(bp);
 331         if (rc)
 332                 return rc;
 333
 334         if (queue_idx >= bnxt_max_rings(bp)) {
 335                 PMD_DRV_LOG(ERR,
 336                         "Cannot create Rx ring %d. Only %d rings available\n",
 337                         queue_idx, bp->max_rx_rings);
 338                 return -EINVAL;
 339         }
 340
 341         if (nb_desc < BNXT_MIN_RING_DESC || nb_desc > MAX_RX_DESC_CNT) {
 342                 PMD_DRV_LOG(ERR, "nb_desc %d is invalid\n", nb_desc);
 343                 return -EINVAL;
 344         }
 345
 346         if (eth_dev->data->rx_queues) {
 347                 rxq = eth_dev->data->rx_queues[queue_idx];
 348                 if (rxq)
 349                         bnxt_rx_queue_release_op(eth_dev, queue_idx);
 350         }
 351         rxq = rte_zmalloc_socket("bnxt_rx_queue", sizeof(struct bnxt_rx_queue),
 352                                  RTE_CACHE_LINE_SIZE, socket_id);
 353         if (!rxq) {
 354                 PMD_DRV_LOG(ERR, "bnxt_rx_queue allocation failed!\n");
 355                 return -ENOMEM;
 356         }
 357         rxq->bp = bp;
 358         rxq->mb_pool = mp;
 359         rxq->nb_rx_desc = nb_desc;
 360         rxq->rx_free_thresh =
 361                 RTE_MIN(rte_align32pow2(nb_desc) / 4, RTE_BNXT_MAX_RX_BURST);
 362
 363         if (rx_conf->rx_drop_en != BNXT_DEFAULT_RX_DROP_EN)
 364                 PMD_DRV_LOG(NOTICE,
 365                             "Per-queue config of drop-en is not supported.\n");
 366         rxq->drop_en = BNXT_DEFAULT_RX_DROP_EN;
 367
 368         PMD_DRV_LOG(DEBUG, "RX Buf MTU %d\n", eth_dev->data->mtu);
 369
 370         eth_dev->data->rx_queues[queue_idx] = rxq;
 371
 372         rc = bnxt_init_rx_ring_struct(rxq, socket_id);
 373         if (rc) {
 374                 PMD_DRV_LOG(ERR,
 375                             "init_rx_ring_struct failed!\n");
 376                 goto err;
 377         }
 378
 379         PMD_DRV_LOG(DEBUG, "RX Buf size is %d\n", rxq->rx_buf_size);
 380         rxq->queue_id = queue_idx;
 381         rxq->port_id = eth_dev->data->port_id;
 382         if (rx_offloads & RTE_ETH_RX_OFFLOAD_KEEP_CRC)
 383                 rxq->crc_len = RTE_ETHER_CRC_LEN;
 384         else
 385                 rxq->crc_len = 0;
 386
 387         /* Allocate RX ring hardware descriptors */
 388         rc = bnxt_alloc_rings(bp, socket_id, queue_idx, NULL, rxq, rxq->cp_ring,
 389                               NULL, "rxr");
 390         if (rc) {
 391                 PMD_DRV_LOG(ERR,
 392                             "ring_dma_zone_reserve for rx_ring failed!\n");
 393                 goto err;
 394         }
 395         rte_atomic64_init(&rxq->rx_mbuf_alloc_fail);
 396
 397         /* rxq 0 must not be stopped when used as async CPR */
 398         if (!BNXT_NUM_ASYNC_CPR(bp) && queue_idx == 0)
 399                 rxq->rx_deferred_start = false;
 400         else
 401                 rxq->rx_deferred_start = rx_conf->rx_deferred_start;
 402
 403         rxq->rx_started = rxq->rx_deferred_start ? false : true;
 404         rxq->vnic = BNXT_GET_DEFAULT_VNIC(bp);
 405
 406         /* Configure mtu if it is different from what was configured before */
 407         if (!queue_idx)
 408                 bnxt_mtu_set_op(eth_dev, eth_dev->data->mtu);
 409
 410         return 0;
 411 err:
 412         bnxt_rx_queue_release_op(eth_dev, queue_idx);
 413         return rc;
 414 }
 415
 416 int
 417 bnxt_rx_queue_intr_enable_op(struct rte_eth_dev *eth_dev, uint16_t queue_id)
 418 {
 419         struct bnxt *bp = eth_dev->data->dev_private;
 420         struct bnxt_rx_queue *rxq;
 421         struct bnxt_cp_ring_info *cpr;
 422         int rc = 0;
 423
 424         rc = is_bnxt_in_error(bp);
 425         if (rc)
 426                 return rc;
 427
 428         if (eth_dev->data->rx_queues) {
 429                 rxq = eth_dev->data->rx_queues[queue_id];
 430                 if (!rxq)
 431                         return -EINVAL;
 432
 433                 cpr = rxq->cp_ring;
 434                 B_CP_DB_REARM(cpr, cpr->cp_raw_cons);
 435         }
 436         return rc;
 437 }
 438
 439 int
 440 bnxt_rx_queue_intr_disable_op(struct rte_eth_dev *eth_dev, uint16_t queue_id)
 441 {
 442         struct bnxt *bp = eth_dev->data->dev_private;
 443         struct bnxt_rx_queue *rxq;
 444         struct bnxt_cp_ring_info *cpr;
 445         int rc = 0;
 446
 447         rc = is_bnxt_in_error(bp);
 448         if (rc)
 449                 return rc;
 450
 451         if (eth_dev->data->rx_queues) {
 452                 rxq = eth_dev->data->rx_queues[queue_id];
 453                 if (!rxq)
 454                         return -EINVAL;
 455
 456                 cpr = rxq->cp_ring;
 457                 B_CP_DB_DISARM(cpr);
 458         }
 459         return rc;
 460 }
 461
 462 int bnxt_rx_queue_start(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 463 {
 464         struct bnxt *bp = dev->data->dev_private;
 465         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
 466         struct bnxt_rx_queue *rxq = bp->rx_queues[rx_queue_id];
 467         struct bnxt_vnic_info *vnic = NULL;
 468         int rc = 0;
 469
 470         rc = is_bnxt_in_error(bp);
 471         if (rc)
 472                 return rc;
 473
 474         if (rxq == NULL) {
 475                 PMD_DRV_LOG(ERR, "Invalid Rx queue %d\n", rx_queue_id);
 476                 return -EINVAL;
 477         }
 478
 479         /* Set the queue state to started here.
 480          * We check the status of the queue while posting buffer.
 481          * If queue is it started, we do not post buffers for Rx.
 482          */
 483         rxq->rx_started = true;
 484         dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STARTED;
 485
 486         bnxt_free_hwrm_rx_ring(bp, rx_queue_id);
 487         rc = bnxt_alloc_hwrm_rx_ring(bp, rx_queue_id);
 488         if (rc)
 489                 return rc;
 490
 491         if (BNXT_HAS_RING_GRPS(bp))
 492                 rxq->vnic->dflt_ring_grp = bp->grp_info[rx_queue_id].fw_grp_id;
 493         /* Reconfigure default receive ring and MRU. */
 494         bnxt_hwrm_vnic_cfg(bp, rxq->vnic);
 495
 496         PMD_DRV_LOG(INFO, "Rx queue started %d\n", rx_queue_id);
 497
 498         if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) {
 499                 vnic = rxq->vnic;
 500
 501                 if (BNXT_HAS_RING_GRPS(bp)) {
 502                         if (vnic->fw_grp_ids[rx_queue_id] != INVALID_HW_RING_ID)
 503                                 return 0;
 504
 505                         vnic->fw_grp_ids[rx_queue_id] =
 506                                         bp->grp_info[rx_queue_id].fw_grp_id;
 507                         PMD_DRV_LOG(DEBUG,
 508                                     "vnic = %p fw_grp_id = %d\n",
 509                                     vnic, bp->grp_info[rx_queue_id].fw_grp_id);
 510                 }
 511
 512                 PMD_DRV_LOG(DEBUG, "Rx Queue Count %d\n", vnic->rx_queue_cnt);
 513                 rc = bnxt_vnic_rss_configure(bp, vnic);
 514         }
 515
 516         if (rc != 0) {
 517                 dev->data->rx_queue_state[rx_queue_id] =
 518                                 RTE_ETH_QUEUE_STATE_STOPPED;
 519                 rxq->rx_started = false;
 520         }
 521
 522         PMD_DRV_LOG(INFO,
 523                     "queue %d, rx_deferred_start %d, state %d!\n",
 524                     rx_queue_id, rxq->rx_deferred_start,
 525                     bp->eth_dev->data->rx_queue_state[rx_queue_id]);
 526
 527         return rc;
 528 }
 529
 530 int bnxt_rx_queue_stop(struct rte_eth_dev *dev, uint16_t rx_queue_id)
 531 {
 532         struct bnxt *bp = dev->data->dev_private;
 533         struct rte_eth_conf *dev_conf = &bp->eth_dev->data->dev_conf;
 534         struct bnxt_vnic_info *vnic = NULL;
 535         struct bnxt_rx_queue *rxq = NULL;
 536         int active_queue_cnt = 0;
 537         int i, rc = 0;
 538
 539         rc = is_bnxt_in_error(bp);
 540         if (rc)
 541                 return rc;
 542
 543         /* For the stingray platform and other platforms needing tighter
 544          * control of resource utilization, Rx CQ 0 also works as
 545          * Default CQ for async notifications
 546          */
 547         if (!BNXT_NUM_ASYNC_CPR(bp) && !rx_queue_id) {
 548                 PMD_DRV_LOG(ERR, "Cannot stop Rx queue id %d\n", rx_queue_id);
 549                 return -EINVAL;
 550         }
 551
 552         rxq = bp->rx_queues[rx_queue_id];
 553         if (!rxq) {
 554                 PMD_DRV_LOG(ERR, "Invalid Rx queue %d\n", rx_queue_id);
 555                 return -EINVAL;
 556         }
 557
 558         vnic = rxq->vnic;
 559         if (!vnic) {
 560                 PMD_DRV_LOG(ERR, "VNIC not initialized for RxQ %d\n",
 561                             rx_queue_id);
 562                 return -EINVAL;
 563         }
 564
 565         dev->data->rx_queue_state[rx_queue_id] = RTE_ETH_QUEUE_STATE_STOPPED;
 566         rxq->rx_started = false;
 567         PMD_DRV_LOG(DEBUG, "Rx queue stopped\n");
 568
 569         if (dev_conf->rxmode.mq_mode & RTE_ETH_MQ_RX_RSS_FLAG) {
 570                 if (BNXT_HAS_RING_GRPS(bp))
 571                         vnic->fw_grp_ids[rx_queue_id] = INVALID_HW_RING_ID;
 572
 573                 PMD_DRV_LOG(DEBUG, "Rx Queue Count %d\n", vnic->rx_queue_cnt);
 574                 rc = bnxt_vnic_rss_configure(bp, vnic);
 575         }
 576
 577         /* Compute current number of active receive queues. */
 578         for (i = vnic->start_grp_id; i < vnic->end_grp_id; i++)
 579                 if (bp->rx_queues[i]->rx_started)
 580                         active_queue_cnt++;
 581
 582         if (BNXT_CHIP_P5(bp)) {
 583                 /*
 584                  * For Thor, we need to ensure that the VNIC default receive
 585                  * ring corresponds to an active receive queue. When no queue
 586                  * is active, we need to temporarily set the MRU to zero so
 587                  * that packets are dropped early in the receive pipeline in
 588                  * order to prevent the VNIC default receive ring from being
 589                  * accessed.
 590                  */
 591                 if (active_queue_cnt == 0) {
 592                         uint16_t saved_mru = vnic->mru;
 593
 594                         /* clear RSS setting on vnic. */
 595                         bnxt_vnic_rss_clear_p5(bp, vnic);
 596
 597                         vnic->mru = 0;
 598                         /* Reconfigure default receive ring and MRU. */
 599                         bnxt_hwrm_vnic_cfg(bp, vnic);
 600                         vnic->mru = saved_mru;
 601                 } else {
 602                         /* Reconfigure default receive ring. */
 603                         bnxt_hwrm_vnic_cfg(bp, vnic);
 604                 }
 605         } else if (active_queue_cnt) {
 606                 /*
 607                  * If the queue being stopped is the current default queue and
 608                  * there are other active queues, pick one of them as the
 609                  * default and reconfigure the vnic.
 610                  */
 611                 if (vnic->dflt_ring_grp == bp->grp_info[rx_queue_id].fw_grp_id) {
 612                         for (i = vnic->start_grp_id; i < vnic->end_grp_id; i++) {
 613                                 if (bp->rx_queues[i]->rx_started) {
 614                                         vnic->dflt_ring_grp =
 615                                                 bp->grp_info[i].fw_grp_id;
 616                                         bnxt_hwrm_vnic_cfg(bp, vnic);
 617                                         break;
 618                                 }
 619                         }
 620                 }
 621         }
 622
 623         if (rc == 0)
 624                 bnxt_rx_queue_release_mbufs(rxq);
 625
 626         return rc;
 627 }