1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright 2017 6WIND S.A.
3 * Copyright 2017 Mellanox Technologies, Ltd
8 * Rx queues configuration for mlx4 driver.
16 /* Verbs headers do not support -pedantic. */
18 #pragma GCC diagnostic ignored "-Wpedantic"
20 #include <infiniband/mlx4dv.h>
21 #include <infiniband/verbs.h>
23 #pragma GCC diagnostic error "-Wpedantic"
26 #include <rte_byteorder.h>
27 #include <rte_common.h>
28 #include <rte_errno.h>
29 #include <ethdev_driver.h>
31 #include <rte_malloc.h>
33 #include <rte_mempool.h>
36 #include "mlx4_glue.h"
37 #include "mlx4_flow.h"
38 #include "mlx4_rxtx.h"
39 #include "mlx4_utils.h"
42 * Historical RSS hash key.
44 * This used to be the default for mlx4 in Linux before v3.19 switched to
45 * generating random hash keys through netdev_rss_key_fill().
47 * It is used in this PMD for consistency with past DPDK releases but can
48 * now be overridden through user configuration.
50 * Note: this is not const to work around API quirks.
53 mlx4_rss_hash_key_default[MLX4_RSS_HASH_KEY_SIZE] = {
54 0x2c, 0xc6, 0x81, 0xd1,
55 0x5b, 0xdb, 0xf4, 0xf7,
56 0xfc, 0xa2, 0x83, 0x19,
57 0xdb, 0x1a, 0x3e, 0x94,
58 0x6b, 0x9e, 0x38, 0xd9,
59 0x2c, 0x9c, 0x03, 0xd1,
60 0xad, 0x99, 0x44, 0xa7,
61 0xd9, 0x56, 0x3d, 0x59,
62 0x06, 0x3c, 0x25, 0xf3,
63 0xfc, 0x1f, 0xdc, 0x2a,
67 * Obtain a RSS context with specified properties.
69 * Used when creating a flow rule targeting one or several Rx queues.
71 * If a matching RSS context already exists, it is returned with its
72 * reference count incremented.
75 * Pointer to private structure.
77 * Fields for RSS processing (Verbs format).
79 * Hash key to use (whose size is exactly MLX4_RSS_HASH_KEY_SIZE).
81 * Number of target queues.
86 * Pointer to RSS context on success, NULL otherwise and rte_errno is set.
89 mlx4_rss_get(struct mlx4_priv *priv, uint64_t fields,
90 const uint8_t key[MLX4_RSS_HASH_KEY_SIZE],
91 uint16_t queues, const uint16_t queue_id[])
94 size_t queue_id_size = sizeof(queue_id[0]) * queues;
96 LIST_FOREACH(rss, &priv->rss, next)
97 if (fields == rss->fields &&
98 queues == rss->queues &&
99 !memcmp(key, rss->key, MLX4_RSS_HASH_KEY_SIZE) &&
100 !memcmp(queue_id, rss->queue_id, queue_id_size)) {
104 rss = rte_malloc(__func__, offsetof(struct mlx4_rss, queue_id) +
108 *rss = (struct mlx4_rss){
117 memcpy(rss->key, key, MLX4_RSS_HASH_KEY_SIZE);
118 memcpy(rss->queue_id, queue_id, queue_id_size);
119 LIST_INSERT_HEAD(&priv->rss, rss, next);
127 * Release a RSS context instance.
129 * Used when destroying a flow rule targeting one or several Rx queues.
131 * This function decrements the reference count of the context and destroys
132 * it after reaching 0. The context must have no users at this point; all
133 * prior calls to mlx4_rss_attach() must have been followed by matching
134 * calls to mlx4_rss_detach().
137 * RSS context to release.
140 mlx4_rss_put(struct mlx4_rss *rss)
142 MLX4_ASSERT(rss->refcnt);
145 MLX4_ASSERT(!rss->usecnt);
146 MLX4_ASSERT(!rss->qp);
147 MLX4_ASSERT(!rss->ind);
148 LIST_REMOVE(rss, next);
153 * Attach a user to a RSS context instance.
155 * Used when the RSS QP and indirection table objects must be instantiated,
156 * that is, when a flow rule must be enabled.
158 * This function increments the usage count of the context.
161 * RSS context to attach to.
164 * 0 on success, a negative errno value otherwise and rte_errno is set.
167 mlx4_rss_attach(struct mlx4_rss *rss)
169 MLX4_ASSERT(rss->refcnt);
171 MLX4_ASSERT(rss->qp);
172 MLX4_ASSERT(rss->ind);
176 struct ibv_wq *ind_tbl[rss->queues];
177 struct mlx4_priv *priv = rss->priv;
178 struct rte_eth_dev *dev = ETH_DEV(priv);
183 if (!rte_is_power_of_2(RTE_DIM(ind_tbl))) {
185 msg = "number of RSS queues must be a power of two";
188 for (i = 0; i != RTE_DIM(ind_tbl); ++i) {
189 uint16_t id = rss->queue_id[i];
190 struct rxq *rxq = NULL;
192 if (id < dev->data->nb_rx_queues)
193 rxq = dev->data->rx_queues[id];
196 msg = "RSS target queue is not configured";
199 ret = mlx4_rxq_attach(rxq);
202 msg = "unable to attach RSS target queue";
205 ind_tbl[i] = rxq->wq;
207 rss->ind = mlx4_glue->create_rwq_ind_table
209 &(struct ibv_rwq_ind_table_init_attr){
210 .log_ind_tbl_size = rte_log2_u32(RTE_DIM(ind_tbl)),
215 ret = errno ? errno : EINVAL;
216 msg = "RSS indirection table creation failure";
219 rss->qp = mlx4_glue->create_qp_ex
221 &(struct ibv_qp_init_attr_ex){
222 .comp_mask = (IBV_QP_INIT_ATTR_PD |
223 IBV_QP_INIT_ATTR_RX_HASH |
224 IBV_QP_INIT_ATTR_IND_TABLE),
225 .qp_type = IBV_QPT_RAW_PACKET,
227 .rwq_ind_tbl = rss->ind,
229 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
230 .rx_hash_key_len = MLX4_RSS_HASH_KEY_SIZE,
231 .rx_hash_key = rss->key,
232 .rx_hash_fields_mask = rss->fields,
236 ret = errno ? errno : EINVAL;
237 msg = "RSS hash QP creation failure";
240 ret = mlx4_glue->modify_qp
242 &(struct ibv_qp_attr){
243 .qp_state = IBV_QPS_INIT,
244 .port_num = priv->port,
246 IBV_QP_STATE | IBV_QP_PORT);
248 msg = "failed to switch RSS hash QP to INIT state";
251 ret = mlx4_glue->modify_qp
253 &(struct ibv_qp_attr){
254 .qp_state = IBV_QPS_RTR,
258 msg = "failed to switch RSS hash QP to RTR state";
264 claim_zero(mlx4_glue->destroy_qp(rss->qp));
268 claim_zero(mlx4_glue->destroy_rwq_ind_table(rss->ind));
272 mlx4_rxq_detach(dev->data->rx_queues[rss->queue_id[i]]);
273 ERROR("mlx4: %s", msg);
280 * Detach a user from a RSS context instance.
282 * Used when disabling (not destroying) a flow rule.
284 * This function decrements the usage count of the context and destroys
285 * usage resources after reaching 0.
288 * RSS context to detach from.
291 mlx4_rss_detach(struct mlx4_rss *rss)
293 struct mlx4_priv *priv = rss->priv;
294 struct rte_eth_dev *dev = ETH_DEV(priv);
297 MLX4_ASSERT(rss->refcnt);
298 MLX4_ASSERT(rss->qp);
299 MLX4_ASSERT(rss->ind);
302 claim_zero(mlx4_glue->destroy_qp(rss->qp));
304 claim_zero(mlx4_glue->destroy_rwq_ind_table(rss->ind));
306 for (i = 0; i != rss->queues; ++i)
307 mlx4_rxq_detach(dev->data->rx_queues[rss->queue_id[i]]);
311 * Initialize common RSS context resources.
313 * Because ConnectX-3 hardware limitations require a fixed order in the
314 * indirection table, WQs must be allocated sequentially to be part of a
315 * common RSS context.
317 * Since a newly created WQ cannot be moved to a different context, this
318 * function allocates them all at once, one for each configured Rx queue,
319 * as well as all related resources (CQs and mbufs).
321 * This must therefore be done before creating any Rx flow rules relying on
322 * indirection tables.
325 * Pointer to private structure.
328 * 0 on success, a negative errno value otherwise and rte_errno is set.
331 mlx4_rss_init(struct mlx4_priv *priv)
333 struct rte_eth_dev *dev = ETH_DEV(priv);
334 uint8_t log2_range = rte_log2_u32(dev->data->nb_rx_queues);
335 uint32_t wq_num_prev = 0;
342 if (ETH_DEV(priv)->data->nb_rx_queues > priv->hw_rss_max_qps) {
343 ERROR("RSS does not support more than %d queues",
344 priv->hw_rss_max_qps);
348 /* Prepare range for RSS contexts before creating the first WQ. */
349 ret = mlx4_glue->dv_set_context_attr
351 MLX4DV_SET_CTX_ATTR_LOG_WQS_RANGE_SZ,
354 ERROR("cannot set up range size for RSS context to %u"
355 " (for %u Rx queues), error: %s",
356 1 << log2_range, dev->data->nb_rx_queues, strerror(ret));
360 for (i = 0; i != ETH_DEV(priv)->data->nb_rx_queues; ++i) {
361 struct rxq *rxq = ETH_DEV(priv)->data->rx_queues[i];
366 /* Attach the configured Rx queues. */
368 MLX4_ASSERT(!rxq->usecnt);
369 ret = mlx4_rxq_attach(rxq);
371 wq_num = rxq->wq->wq_num;
375 msg = "unable to create Rx queue resources";
379 * WQs are temporarily allocated for unconfigured Rx queues
380 * to maintain proper index alignment in indirection table
381 * by skipping unused WQ numbers.
383 * The reason this works at all even though these WQs are
384 * immediately destroyed is that WQNs are allocated
385 * sequentially and are guaranteed to never be reused in the
386 * same context by the underlying implementation.
388 cq = mlx4_glue->create_cq(priv->ctx, 1, NULL, NULL, 0);
391 msg = "placeholder CQ creation failure";
394 wq = mlx4_glue->create_wq
396 &(struct ibv_wq_init_attr){
397 .wq_type = IBV_WQT_RQ,
405 claim_zero(mlx4_glue->destroy_wq(wq));
407 wq_num = 0; /* Shut up GCC 4.8 warnings. */
409 claim_zero(mlx4_glue->destroy_cq(cq));
412 msg = "placeholder WQ creation failure";
417 * While guaranteed by the implementation, make sure WQ
418 * numbers are really sequential (as the saying goes,
419 * trust, but verify).
421 if (i && wq_num - wq_num_prev != 1) {
423 mlx4_rxq_detach(rxq);
425 msg = "WQ numbers are not sequential";
428 wq_num_prev = wq_num;
433 ERROR("cannot initialize common RSS resources (queue %u): %s: %s",
434 i, msg, strerror(ret));
436 struct rxq *rxq = ETH_DEV(priv)->data->rx_queues[i];
439 mlx4_rxq_detach(rxq);
446 * Release common RSS context resources.
448 * As the reverse of mlx4_rss_init(), this must be done after removing all
449 * flow rules relying on indirection tables.
452 * Pointer to private structure.
455 mlx4_rss_deinit(struct mlx4_priv *priv)
461 for (i = 0; i != ETH_DEV(priv)->data->nb_rx_queues; ++i) {
462 struct rxq *rxq = ETH_DEV(priv)->data->rx_queues[i];
465 MLX4_ASSERT(rxq->usecnt == 1);
466 mlx4_rxq_detach(rxq);
473 * Attach a user to a Rx queue.
475 * Used when the resources of an Rx queue must be instantiated for it to
476 * become in a usable state.
478 * This function increments the usage count of the Rx queue.
481 * Pointer to Rx queue structure.
484 * 0 on success, negative errno value otherwise and rte_errno is set.
487 mlx4_rxq_attach(struct rxq *rxq)
490 MLX4_ASSERT(rxq->cq);
491 MLX4_ASSERT(rxq->wq);
492 MLX4_ASSERT(rxq->wqes);
493 MLX4_ASSERT(rxq->rq_db);
497 struct mlx4_priv *priv = rxq->priv;
498 struct rte_eth_dev *dev = ETH_DEV(priv);
499 const uint32_t elts_n = 1 << rxq->elts_n;
500 const uint32_t sges_n = 1 << rxq->sges_n;
501 struct rte_mbuf *(*elts)[elts_n] = rxq->elts;
502 struct mlx4dv_obj mlxdv;
503 struct mlx4dv_rwq dv_rwq;
504 struct mlx4dv_cq dv_cq = { .comp_mask = MLX4DV_CQ_MASK_UAR, };
506 struct ibv_cq *cq = NULL;
507 struct ibv_wq *wq = NULL;
508 uint32_t create_flags = 0;
509 uint32_t comp_mask = 0;
510 volatile struct mlx4_wqe_data_seg (*wqes)[];
514 MLX4_ASSERT(rte_is_power_of_2(elts_n));
515 priv->verbs_alloc_ctx.type = MLX4_VERBS_ALLOC_TYPE_RX_QUEUE;
516 priv->verbs_alloc_ctx.obj = rxq;
517 cq = mlx4_glue->create_cq(priv->ctx, elts_n / sges_n, NULL,
521 msg = "CQ creation failure";
524 /* By default, FCS (CRC) is stripped by hardware. */
525 if (rxq->crc_present) {
526 create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
527 comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
529 wq = mlx4_glue->create_wq
531 &(struct ibv_wq_init_attr){
532 .wq_type = IBV_WQT_RQ,
533 .max_wr = elts_n / sges_n,
537 .comp_mask = comp_mask,
538 .create_flags = create_flags,
541 ret = errno ? errno : EINVAL;
542 msg = "WQ creation failure";
545 ret = mlx4_glue->modify_wq
547 &(struct ibv_wq_attr){
548 .attr_mask = IBV_WQ_ATTR_STATE,
549 .wq_state = IBV_WQS_RDY,
552 msg = "WQ state change to IBV_WQS_RDY failed";
555 /* Retrieve device queue information. */
557 mlxdv.cq.out = &dv_cq;
559 mlxdv.rwq.out = &dv_rwq;
560 ret = mlx4_glue->dv_init_obj(&mlxdv, MLX4DV_OBJ_RWQ | MLX4DV_OBJ_CQ);
562 msg = "failed to obtain device information from WQ/CQ objects";
565 /* Pre-register Rx mempool. */
566 DEBUG("port %u Rx queue %u registering mp %s having %u chunks",
567 ETH_DEV(priv)->data->port_id, rxq->stats.idx,
568 rxq->mp->name, rxq->mp->nb_mem_chunks);
569 mlx4_mr_update_mp(dev, &rxq->mr_ctrl, rxq->mp);
570 wqes = (volatile struct mlx4_wqe_data_seg (*)[])
571 ((uintptr_t)dv_rwq.buf.buf + dv_rwq.rq.offset);
572 for (i = 0; i != RTE_DIM(*elts); ++i) {
573 volatile struct mlx4_wqe_data_seg *scat = &(*wqes)[i];
574 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
578 rte_pktmbuf_free_seg((*elts)[i]);
582 msg = "cannot allocate mbuf";
585 /* Headroom is reserved by rte_pktmbuf_alloc(). */
586 MLX4_ASSERT(buf->data_off == RTE_PKTMBUF_HEADROOM);
587 /* Buffer is supposed to be empty. */
588 MLX4_ASSERT(rte_pktmbuf_data_len(buf) == 0);
589 MLX4_ASSERT(rte_pktmbuf_pkt_len(buf) == 0);
590 /* Only the first segment keeps headroom. */
593 buf->port = rxq->port_id;
594 buf->data_len = rte_pktmbuf_tailroom(buf);
595 buf->pkt_len = rte_pktmbuf_tailroom(buf);
597 *scat = (struct mlx4_wqe_data_seg){
598 .addr = rte_cpu_to_be_64(rte_pktmbuf_mtod(buf,
600 .byte_count = rte_cpu_to_be_32(buf->data_len),
601 .lkey = mlx4_rx_mb2mr(rxq, buf),
605 DEBUG("%p: allocated and configured %u segments (max %u packets)",
606 (void *)rxq, elts_n, elts_n / sges_n);
610 rxq->rq_db = dv_rwq.rdb;
611 rxq->mcq.buf = dv_cq.buf.buf;
612 rxq->mcq.cqe_cnt = dv_cq.cqe_cnt;
613 rxq->mcq.set_ci_db = dv_cq.set_ci_db;
614 rxq->mcq.cqe_64 = (dv_cq.cqe_size & 64) ? 1 : 0;
615 rxq->mcq.arm_db = dv_cq.arm_db;
616 rxq->mcq.arm_sn = dv_cq.arm_sn;
617 rxq->mcq.cqn = dv_cq.cqn;
618 rxq->mcq.cq_uar = dv_cq.cq_uar;
619 rxq->mcq.cq_db_reg = (uint8_t *)dv_cq.cq_uar + MLX4_CQ_DOORBELL;
620 /* Update doorbell counter. */
621 rxq->rq_ci = elts_n / sges_n;
623 *rxq->rq_db = rte_cpu_to_be_32(rxq->rq_ci);
624 priv->verbs_alloc_ctx.type = MLX4_VERBS_ALLOC_TYPE_NONE;
628 claim_zero(mlx4_glue->destroy_wq(wq));
630 claim_zero(mlx4_glue->destroy_cq(cq));
633 ERROR("error while attaching Rx queue %p: %s: %s",
634 (void *)rxq, msg, strerror(ret));
635 priv->verbs_alloc_ctx.type = MLX4_VERBS_ALLOC_TYPE_NONE;
640 * Detach a user from a Rx queue.
642 * This function decrements the usage count of the Rx queue and destroys
643 * usage resources after reaching 0.
646 * Pointer to Rx queue structure.
649 mlx4_rxq_detach(struct rxq *rxq)
652 struct rte_mbuf *(*elts)[1 << rxq->elts_n] = rxq->elts;
657 memset(&rxq->mcq, 0, sizeof(rxq->mcq));
660 claim_zero(mlx4_glue->destroy_wq(rxq->wq));
662 claim_zero(mlx4_glue->destroy_cq(rxq->cq));
664 DEBUG("%p: freeing Rx queue elements", (void *)rxq);
665 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
668 rte_pktmbuf_free_seg((*elts)[i]);
674 * Returns the per-queue supported offloads.
677 * Pointer to private structure.
680 * Supported Tx offloads.
683 mlx4_get_rx_queue_offloads(struct mlx4_priv *priv)
685 uint64_t offloads = DEV_RX_OFFLOAD_SCATTER |
686 DEV_RX_OFFLOAD_KEEP_CRC |
687 DEV_RX_OFFLOAD_JUMBO_FRAME |
688 DEV_RX_OFFLOAD_RSS_HASH;
691 offloads |= DEV_RX_OFFLOAD_CHECKSUM;
696 * Returns the per-port supported offloads.
699 * Pointer to private structure.
702 * Supported Rx offloads.
705 mlx4_get_rx_port_offloads(struct mlx4_priv *priv)
707 uint64_t offloads = DEV_RX_OFFLOAD_VLAN_FILTER;
714 * DPDK callback to configure a Rx queue.
717 * Pointer to Ethernet device structure.
721 * Number of descriptors to configure in queue.
723 * NUMA socket on which memory must be allocated.
725 * Thresholds parameters.
727 * Memory pool for buffer allocations.
730 * 0 on success, negative errno value otherwise and rte_errno is set.
733 mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
734 unsigned int socket, const struct rte_eth_rxconf *conf,
735 struct rte_mempool *mp)
737 struct mlx4_priv *priv = dev->data->dev_private;
738 uint32_t mb_len = rte_pktmbuf_data_room_size(mp);
739 struct rte_mbuf *(*elts)[rte_align32pow2(desc)];
741 struct mlx4_malloc_vec vec[] = {
743 .align = RTE_CACHE_LINE_SIZE,
744 .size = sizeof(*rxq),
745 .addr = (void **)&rxq,
748 .align = RTE_CACHE_LINE_SIZE,
749 .size = sizeof(*elts),
750 .addr = (void **)&elts,
754 uint32_t crc_present;
757 offloads = conf->offloads | dev->data->dev_conf.rxmode.offloads;
759 DEBUG("%p: configuring queue %u for %u descriptors",
760 (void *)dev, idx, desc);
762 if (idx >= dev->data->nb_rx_queues) {
763 rte_errno = EOVERFLOW;
764 ERROR("%p: queue index out of range (%u >= %u)",
765 (void *)dev, idx, dev->data->nb_rx_queues);
768 rxq = dev->data->rx_queues[idx];
771 ERROR("%p: Rx queue %u already configured, release it first",
777 ERROR("%p: invalid number of Rx descriptors", (void *)dev);
780 if (desc != RTE_DIM(*elts)) {
781 desc = RTE_DIM(*elts);
782 WARN("%p: increased number of descriptors in Rx queue %u"
783 " to the next power of two (%u)",
784 (void *)dev, idx, desc);
786 /* By default, FCS (CRC) is stripped by hardware. */
788 if (offloads & DEV_RX_OFFLOAD_KEEP_CRC) {
789 if (priv->hw_fcs_strip) {
792 WARN("%p: CRC stripping has been disabled but will still"
793 " be performed by hardware, make sure MLNX_OFED and"
794 " firmware are up to date",
798 DEBUG("%p: CRC stripping is %s, %u bytes will be subtracted from"
799 " incoming frames to hide it",
801 crc_present ? "disabled" : "enabled",
803 /* Allocate and initialize Rx queue. */
804 mlx4_zmallocv_socket("RXQ", vec, RTE_DIM(vec), socket);
806 ERROR("%p: unable to allocate queue index %u",
813 .port_id = dev->data->port_id,
815 .elts_n = rte_log2_u32(desc),
817 /* Toggle Rx checksum offload if hardware supports it. */
818 .csum = priv->hw_csum &&
819 (offloads & DEV_RX_OFFLOAD_CHECKSUM),
820 .csum_l2tun = priv->hw_csum_l2tun &&
821 (offloads & DEV_RX_OFFLOAD_CHECKSUM),
822 .crc_present = crc_present,
823 .l2tun_offload = priv->hw_csum_l2tun,
829 dev->data->rx_queues[idx] = rxq;
830 /* Enable scattered packets support for this queue if necessary. */
831 MLX4_ASSERT(mb_len >= RTE_PKTMBUF_HEADROOM);
832 if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
833 (mb_len - RTE_PKTMBUF_HEADROOM)) {
835 } else if (offloads & DEV_RX_OFFLOAD_SCATTER) {
837 RTE_PKTMBUF_HEADROOM +
838 dev->data->dev_conf.rxmode.max_rx_pkt_len;
842 * Determine the number of SGEs needed for a full packet
843 * and round it to the next power of two.
845 sges_n = rte_log2_u32((size / mb_len) + !!(size % mb_len));
846 rxq->sges_n = sges_n;
847 /* Make sure sges_n did not overflow. */
848 size = mb_len * (1 << rxq->sges_n);
849 size -= RTE_PKTMBUF_HEADROOM;
850 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
851 rte_errno = EOVERFLOW;
852 ERROR("%p: too many SGEs (%u) needed to handle"
853 " requested maximum packet size %u",
856 dev->data->dev_conf.rxmode.max_rx_pkt_len);
860 WARN("%p: the requested maximum Rx packet size (%u) is"
861 " larger than a single mbuf (%u) and scattered"
862 " mode has not been requested",
864 dev->data->dev_conf.rxmode.max_rx_pkt_len,
865 mb_len - RTE_PKTMBUF_HEADROOM);
867 DEBUG("%p: maximum number of segments per packet: %u",
868 (void *)dev, 1 << rxq->sges_n);
869 if (desc % (1 << rxq->sges_n)) {
871 ERROR("%p: number of Rx queue descriptors (%u) is not a"
872 " multiple of maximum segments per packet (%u)",
878 if (mlx4_mr_btree_init(&rxq->mr_ctrl.cache_bh,
879 MLX4_MR_BTREE_CACHE_N, socket)) {
880 /* rte_errno is already set. */
883 if (dev->data->dev_conf.intr_conf.rxq) {
884 rxq->channel = mlx4_glue->create_comp_channel(priv->ctx);
885 if (rxq->channel == NULL) {
887 ERROR("%p: Rx interrupt completion channel creation"
889 (void *)dev, strerror(rte_errno));
892 if (mlx4_fd_set_non_blocking(rxq->channel->fd) < 0) {
893 ERROR("%p: unable to make Rx interrupt completion"
894 " channel non-blocking: %s",
895 (void *)dev, strerror(rte_errno));
899 DEBUG("%p: adding Rx queue %p to list", (void *)dev, (void *)rxq);
903 mlx4_rx_queue_release(dev, idx);
905 MLX4_ASSERT(rte_errno > 0);
910 * DPDK callback to release a Rx queue.
913 * Pointer to Ethernet device structure.
915 * Receive queue index.
918 mlx4_rx_queue_release(struct rte_eth_dev *dev, uint16_t idx)
920 struct rxq *rxq = dev->data->rx_queues[idx];
924 dev->data->rx_queues[idx] = NULL;
925 DEBUG("%p: removing Rx queue %hu from list", (void *)dev, idx);
926 MLX4_ASSERT(!rxq->cq);
927 MLX4_ASSERT(!rxq->wq);
928 MLX4_ASSERT(!rxq->wqes);
929 MLX4_ASSERT(!rxq->rq_db);
931 claim_zero(mlx4_glue->destroy_comp_channel(rxq->channel));
932 mlx4_mr_btree_free(&rxq->mr_ctrl.cache_bh);