This patch introduces shared RXQ. All share Rx queues with same group
and queue id shares same rxq_ctrl. Rxq_ctrl and rxq_data are shared,
all queues from different member port share same WQ and CQ, essentially
one Rx WQ, mbufs are filled into this singleton WQ.

Shared rxq_data is set into device Rx queues of all member ports as
rxq object, used for receiving packets. Polling queue of any member
ports returns packets of any member, mbuf->port is used to identify
source port.

Signed-off-by: Xueming Li <xuemi...@nvidia.com>
---
 doc/guides/nics/features/mlx5.ini |   1 +
 doc/guides/nics/mlx5.rst          |   6 +
 drivers/net/mlx5/linux/mlx5_os.c  |   2 +
 drivers/net/mlx5/mlx5.h           |   2 +
 drivers/net/mlx5/mlx5_devx.c      |   9 +-
 drivers/net/mlx5/mlx5_rx.h        |   7 +
 drivers/net/mlx5/mlx5_rxq.c       | 208 ++++++++++++++++++++++++++----
 drivers/net/mlx5/mlx5_trigger.c   |  76 ++++++-----
 8 files changed, 255 insertions(+), 56 deletions(-)

diff --git a/doc/guides/nics/features/mlx5.ini 
b/doc/guides/nics/features/mlx5.ini
index f01abd4231f..ff5e669acc1 100644
--- a/doc/guides/nics/features/mlx5.ini
+++ b/doc/guides/nics/features/mlx5.ini
@@ -11,6 +11,7 @@ Removal event        = Y
 Rx interrupt         = Y
 Fast mbuf free       = Y
 Queue start/stop     = Y
+Shared Rx queue      = Y
 Burst mode info      = Y
 Power mgmt address monitor = Y
 MTU update           = Y
diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst
index ca3e7f560da..494ee957c1d 100644
--- a/doc/guides/nics/mlx5.rst
+++ b/doc/guides/nics/mlx5.rst
@@ -113,6 +113,7 @@ Features
 - Connection tracking.
 - Sub-Function representors.
 - Sub-Function.
+- Shared Rx queue.
 
 
 Limitations
@@ -464,6 +465,11 @@ Limitations
   - In order to achieve best insertion rate, application should manage the 
flows per lcore.
   - Better to disable memory reclaim by setting ``reclaim_mem_mode`` to 0 to 
accelerate the flow object allocation and release with cache.
 
+ Shared Rx queue:
+
+  - Counter of received packets and bytes number of devices in same share 
group are same.
+  - Counter of received packets and bytes number of queues in same group and 
queue ID are same.
+
 Statistics
 ----------
 
diff --git a/drivers/net/mlx5/linux/mlx5_os.c b/drivers/net/mlx5/linux/mlx5_os.c
index 27233b679c6..b631768b4f9 100644
--- a/drivers/net/mlx5/linux/mlx5_os.c
+++ b/drivers/net/mlx5/linux/mlx5_os.c
@@ -457,6 +457,7 @@ mlx5_alloc_shared_dr(struct mlx5_priv *priv)
                        mlx5_glue->dr_create_flow_action_default_miss();
        if (!sh->default_miss_action)
                DRV_LOG(WARNING, "Default miss action is not supported.");
+       LIST_INIT(&sh->shared_rxqs);
        return 0;
 error:
        /* Rollback the created objects. */
@@ -531,6 +532,7 @@ mlx5_os_free_shared_dr(struct mlx5_priv *priv)
        MLX5_ASSERT(sh && sh->refcnt);
        if (sh->refcnt > 1)
                return;
+       MLX5_ASSERT(LIST_EMPTY(&sh->shared_rxqs));
 #ifdef HAVE_MLX5DV_DR
        if (sh->rx_domain) {
                mlx5_glue->dr_destroy_domain(sh->rx_domain);
diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 6a9c99a8826..c671c8a354f 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -1193,6 +1193,7 @@ struct mlx5_dev_ctx_shared {
        struct mlx5_flex_parser_profiles fp[MLX5_FLEX_PARSER_MAX];
        /* Flex parser profiles information. */
        void *devx_rx_uar; /* DevX UAR for Rx. */
+       LIST_HEAD(shared_rxqs, mlx5_rxq_ctrl) shared_rxqs; /* Shared RXQs. */
        struct mlx5_aso_age_mng *aso_age_mng;
        /* Management data for aging mechanism using ASO Flow Hit. */
        struct mlx5_geneve_tlv_option_resource *geneve_tlv_option_resource;
@@ -1257,6 +1258,7 @@ struct mlx5_rxq_obj {
                };
                struct mlx5_devx_obj *rq; /* DevX RQ object for hairpin. */
                struct {
+                       struct mlx5_devx_rmp devx_rmp; /* RMP for shared RQ. */
                        struct mlx5_devx_cq cq_obj; /* DevX CQ object. */
                        void *devx_channel;
                };
diff --git a/drivers/net/mlx5/mlx5_devx.c b/drivers/net/mlx5/mlx5_devx.c
index 371ff387c99..01561639038 100644
--- a/drivers/net/mlx5/mlx5_devx.c
+++ b/drivers/net/mlx5/mlx5_devx.c
@@ -170,6 +170,8 @@ mlx5_rxq_devx_obj_release(struct mlx5_rxq_priv *rxq)
                memset(&rxq->devx_rq, 0, sizeof(rxq->devx_rq));
                mlx5_devx_cq_destroy(&rxq_obj->cq_obj);
                memset(&rxq_obj->cq_obj, 0, sizeof(rxq_obj->cq_obj));
+               if (!RXQ_CTRL_LAST(rxq))
+                       return;
                if (rxq_obj->devx_channel) {
                        mlx5_os_devx_destroy_event_channel
                                                        (rxq_obj->devx_channel);
@@ -270,6 +272,8 @@ mlx5_rxq_create_devx_rq_resources(struct mlx5_rxq_priv *rxq)
        rq_attr.wq_attr.pd = priv->sh->pdn;
        rq_attr.counter_set_id = priv->counter_set_id;
        /* Create RQ using DevX API. */
+       if (rxq_data->shared)
+               rxq->devx_rq.rmp = &rxq_ctrl->obj->devx_rmp;
        return mlx5_devx_rq_create(priv->sh->ctx, &rxq->devx_rq,
                                   wqe_size, log_desc_n, &rq_attr,
                                   rxq_ctrl->socket);
@@ -495,7 +499,10 @@ mlx5_rxq_devx_obj_new(struct mlx5_rxq_priv *rxq)
        ret = mlx5_devx_modify_rq(rxq, MLX5_RXQ_MOD_RST2RDY);
        if (ret)
                goto error;
-       rxq_data->wqes = (void *)(uintptr_t)rxq->devx_rq.wq.umem_buf;
+       if (rxq_data->shared)
+               rxq_data->wqes = (void *)(uintptr_t)tmpl->devx_rmp.wq.umem_buf;
+       else
+               rxq_data->wqes = (void *)(uintptr_t)rxq->devx_rq.wq.umem_buf;
        rxq_data->rq_db = (uint32_t *)(uintptr_t)rxq->devx_rq.db_rec;
        mlx5_rxq_initialize(rxq_data);
        priv->dev_data->rx_queue_state[rxq->idx] = RTE_ETH_QUEUE_STATE_STARTED;
diff --git a/drivers/net/mlx5/mlx5_rx.h b/drivers/net/mlx5/mlx5_rx.h
index 161399c764d..a83fa6e8db1 100644
--- a/drivers/net/mlx5/mlx5_rx.h
+++ b/drivers/net/mlx5/mlx5_rx.h
@@ -26,6 +26,9 @@
 #define RXQ_PORT(rxq_ctrl) LIST_FIRST(&(rxq_ctrl)->owners)->priv
 #define RXQ_DEV(rxq_ctrl) ETH_DEV(RXQ_PORT(rxq_ctrl))
 #define RXQ_PORT_ID(rxq_ctrl) PORT_ID(RXQ_PORT(rxq_ctrl))
+#define RXQ_CTRL_LAST(rxq) \
+       (LIST_FIRST(&(rxq)->ctrl->owners) == (rxq) && \
+       LIST_NEXT((rxq), owner_entry) == NULL)
 
 struct mlx5_rxq_stats {
 #ifdef MLX5_PMD_SOFT_COUNTERS
@@ -107,6 +110,7 @@ struct mlx5_rxq_data {
        unsigned int lro:1; /* Enable LRO. */
        unsigned int dynf_meta:1; /* Dynamic metadata is configured. */
        unsigned int mcqe_format:3; /* CQE compression format. */
+       unsigned int shared:1; /* Shared RXQ. */
        volatile uint32_t *rq_db;
        volatile uint32_t *cq_db;
        uint16_t port_id;
@@ -169,6 +173,9 @@ struct mlx5_rxq_ctrl {
        struct mlx5_dev_ctx_shared *sh; /* Shared context. */
        enum mlx5_rxq_type type; /* Rxq type. */
        unsigned int socket; /* CPU socket ID for allocations. */
+       LIST_ENTRY(mlx5_rxq_ctrl) share_entry; /* Entry in shared RXQ list. */
+       uint32_t share_group; /* Group ID of shared RXQ. */
+       unsigned int started:1; /* Whether (shared) RXQ has been started. */
        unsigned int irq:1; /* Whether IRQ is enabled. */
        uint32_t flow_mark_n; /* Number of Mark/Flag flows using this Queue. */
        uint32_t flow_tunnels_n[MLX5_FLOW_TUNNEL]; /* Tunnels counters. */
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index cde01a48022..45f78ad076b 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -28,6 +28,7 @@
 #include "mlx5_rx.h"
 #include "mlx5_utils.h"
 #include "mlx5_autoconf.h"
+#include "mlx5_devx.h"
 
 
 /* Default RSS hash key also used for ConnectX-3. */
@@ -352,6 +353,9 @@ mlx5_get_rx_queue_offloads(struct rte_eth_dev *dev)
                offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
        if (MLX5_LRO_SUPPORTED(dev))
                offloads |= DEV_RX_OFFLOAD_TCP_LRO;
+       if (priv->config.hca_attr.mem_rq_rmp &&
+           priv->obj_ops.rxq_obj_new == devx_obj_ops.rxq_obj_new)
+               offloads |= RTE_ETH_RX_OFFLOAD_SHARED_RXQ;
        return offloads;
 }
 
@@ -648,6 +652,114 @@ mlx5_rx_queue_pre_setup(struct rte_eth_dev *dev, uint16_t 
idx, uint16_t *desc)
        return 0;
 }
 
+/**
+ * Get the shared Rx queue object that matches group and queue index.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param group
+ *   Shared RXQ group.
+ * @param idx
+ *   RX queue index.
+ *
+ * @return
+ *   Shared RXQ object that matching, or NULL if not found.
+ */
+static struct mlx5_rxq_ctrl *
+mlx5_shared_rxq_get(struct rte_eth_dev *dev, uint32_t group, uint16_t idx)
+{
+       struct mlx5_rxq_ctrl *rxq_ctrl;
+       struct mlx5_priv *priv = dev->data->dev_private;
+
+       LIST_FOREACH(rxq_ctrl, &priv->sh->shared_rxqs, share_entry) {
+               if (rxq_ctrl->share_group == group && rxq_ctrl->rxq.idx == idx)
+                       return rxq_ctrl;
+       }
+       return NULL;
+}
+
+/**
+ * Check whether requested Rx queue configuration matches shared RXQ.
+ *
+ * @param rxq_ctrl
+ *   Pointer to shared RXQ.
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param idx
+ *   Queue index.
+ * @param desc
+ *   Number of descriptors to configure in queue.
+ * @param socket
+ *   NUMA socket on which memory must be allocated.
+ * @param[in] conf
+ *   Thresholds parameters.
+ * @param mp
+ *   Memory pool for buffer allocations.
+ *
+ * @return
+ *   0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static bool
+mlx5_shared_rxq_match(struct mlx5_rxq_ctrl *rxq_ctrl, struct rte_eth_dev *dev,
+                     uint16_t idx, uint16_t desc, unsigned int socket,
+                     const struct rte_eth_rxconf *conf,
+                     struct rte_mempool *mp)
+{
+       struct mlx5_priv *spriv = LIST_FIRST(&rxq_ctrl->owners)->priv;
+       struct mlx5_priv *priv = dev->data->dev_private;
+       unsigned int mprq_stride_nums = priv->config.mprq.stride_num_n ?
+               priv->config.mprq.stride_num_n : MLX5_MPRQ_STRIDE_NUM_N;
+
+       RTE_SET_USED(conf);
+       if (rxq_ctrl->socket != socket) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: socket mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (priv->config.mprq.enabled)
+               desc >>= mprq_stride_nums;
+       if (rxq_ctrl->rxq.elts_n != log2above(desc)) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: descriptor number mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (priv->mtu != spriv->mtu) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: mtu mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (priv->dev_data->dev_conf.intr_conf.rxq !=
+           spriv->dev_data->dev_conf.intr_conf.rxq) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: interrupt mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (!spriv->config.mprq.enabled && rxq_ctrl->rxq.mp != mp) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: mempool mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (priv->config.hw_padding != spriv->config.hw_padding) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: padding mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (memcmp(&priv->config.mprq, &spriv->config.mprq,
+                  sizeof(priv->config.mprq)) != 0) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: MPRQ mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       if (priv->config.cqe_comp != spriv->config.cqe_comp ||
+           (priv->config.cqe_comp &&
+            priv->config.cqe_comp_fmt != spriv->config.cqe_comp_fmt)) {
+               DRV_LOG(ERR, "port %u queue index %u failed to join shared 
group: CQE compression mismatch",
+                       dev->data->port_id, idx);
+               return false;
+       }
+       return true;
+}
+
 /**
  *
  * @param dev
@@ -673,12 +785,14 @@ mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t 
idx, uint16_t desc,
 {
        struct mlx5_priv *priv = dev->data->dev_private;
        struct mlx5_rxq_priv *rxq;
-       struct mlx5_rxq_ctrl *rxq_ctrl;
+       struct mlx5_rxq_ctrl *rxq_ctrl = NULL;
        struct rte_eth_rxseg_split *rx_seg =
                                (struct rte_eth_rxseg_split *)conf->rx_seg;
        struct rte_eth_rxseg_split rx_single = {.mp = mp};
        uint16_t n_seg = conf->rx_nseg;
        int res;
+       uint64_t offloads = conf->offloads |
+                           dev->data->dev_conf.rxmode.offloads;
 
        if (mp) {
                /*
@@ -690,9 +804,6 @@ mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, 
uint16_t desc,
                n_seg = 1;
        }
        if (n_seg > 1) {
-               uint64_t offloads = conf->offloads |
-                                   dev->data->dev_conf.rxmode.offloads;
-
                /* The offloads should be checked on rte_eth_dev layer. */
                MLX5_ASSERT(offloads & DEV_RX_OFFLOAD_SCATTER);
                if (!(offloads & RTE_ETH_RX_OFFLOAD_BUFFER_SPLIT)) {
@@ -704,9 +815,32 @@ mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, 
uint16_t desc,
                }
                MLX5_ASSERT(n_seg < MLX5_MAX_RXQ_NSEG);
        }
+       if (offloads & RTE_ETH_RX_OFFLOAD_SHARED_RXQ) {
+               if (!priv->config.hca_attr.mem_rq_rmp) {
+                       DRV_LOG(ERR, "port %u queue index %u shared Rx queue 
not supported by fw",
+                                    dev->data->port_id, idx);
+                       rte_errno = EINVAL;
+                       return -rte_errno;
+               }
+               if (priv->obj_ops.rxq_obj_new != devx_obj_ops.rxq_obj_new) {
+                       DRV_LOG(ERR, "port %u queue index %u shared Rx queue 
needs DevX api",
+                                    dev->data->port_id, idx);
+                       rte_errno = EINVAL;
+                       return -rte_errno;
+               }
+               /* Try to reuse shared RXQ. */
+               rxq_ctrl = mlx5_shared_rxq_get(dev, conf->shared_group, idx);
+               if (rxq_ctrl != NULL &&
+                   !mlx5_shared_rxq_match(rxq_ctrl, dev, idx, desc, socket,
+                                          conf, mp)) {
+                       rte_errno = EINVAL;
+                       return -rte_errno;
+               }
+       }
        res = mlx5_rx_queue_pre_setup(dev, idx, &desc);
        if (res)
                return res;
+       /* Allocate RXQ. */
        rxq = mlx5_malloc(MLX5_MEM_ANY | MLX5_MEM_ZERO, sizeof(*rxq), 0,
                          SOCKET_ID_ANY);
        if (!rxq) {
@@ -718,14 +852,22 @@ mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t 
idx, uint16_t desc,
        rxq->priv = priv;
        rxq->idx = idx;
        (*priv->rxq_privs)[idx] = rxq;
-       rxq_ctrl = mlx5_rxq_new(dev, rxq, desc, socket, conf, rx_seg, n_seg);
-       if (!rxq_ctrl) {
-               DRV_LOG(ERR, "port %u unable to allocate rx queue index %u",
-                       dev->data->port_id, idx);
-               mlx5_free(rxq);
-               (*priv->rxq_privs)[idx] = NULL;
-               rte_errno = ENOMEM;
-               return -rte_errno;
+       if (rxq_ctrl != NULL) {
+               /* Join owner list of shared RXQ. */
+               LIST_INSERT_HEAD(&rxq_ctrl->owners, rxq, owner_entry);
+               rxq->ctrl = rxq_ctrl;
+       } else {
+               /* Create new shared RXQ. */
+               rxq_ctrl = mlx5_rxq_new(dev, rxq, desc, socket, conf, rx_seg,
+                                       n_seg);
+               if (rxq_ctrl == NULL) {
+                       DRV_LOG(ERR, "port %u unable to allocate rx queue index 
%u",
+                               dev->data->port_id, idx);
+                       mlx5_free(rxq);
+                       (*priv->rxq_privs)[idx] = NULL;
+                       rte_errno = ENOMEM;
+                       return -rte_errno;
+               }
        }
        DRV_LOG(DEBUG, "port %u adding Rx queue %u to list",
                dev->data->port_id, idx);
@@ -1071,6 +1213,9 @@ mlx5_rxq_obj_verify(struct rte_eth_dev *dev)
        struct mlx5_rxq_obj *rxq_obj;
 
        LIST_FOREACH(rxq_obj, &priv->rxqsobj, next) {
+               if (rxq_obj->rxq_ctrl->rxq.shared &&
+                   !LIST_EMPTY(&rxq_obj->rxq_ctrl->owners))
+                       continue;
                DRV_LOG(DEBUG, "port %u Rx queue %u still referenced",
                        dev->data->port_id, rxq_obj->rxq_ctrl->rxq.idx);
                ++ret;
@@ -1348,6 +1493,10 @@ mlx5_rxq_new(struct rte_eth_dev *dev, struct 
mlx5_rxq_priv *rxq,
                return NULL;
        }
        LIST_INIT(&tmpl->owners);
+       if (offloads & RTE_ETH_RX_OFFLOAD_SHARED_RXQ) {
+               tmpl->rxq.shared = 1;
+               LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry);
+       }
        rxq->ctrl = tmpl;
        LIST_INSERT_HEAD(&tmpl->owners, rxq, owner_entry);
        MLX5_ASSERT(n_seg && n_seg <= MLX5_MAX_RXQ_NSEG);
@@ -1771,6 +1920,7 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
        struct mlx5_priv *priv = dev->data->dev_private;
        struct mlx5_rxq_priv *rxq;
        struct mlx5_rxq_ctrl *rxq_ctrl;
+       bool free_ctrl;
 
        if (priv->rxq_privs == NULL)
                return 0;
@@ -1780,24 +1930,36 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
        if (mlx5_rxq_deref(dev, idx) > 1)
                return 1;
        rxq_ctrl = rxq->ctrl;
-       if (rxq_ctrl->obj != NULL) {
+       /* If the last entry in share RXQ. */
+       free_ctrl = RXQ_CTRL_LAST(rxq);
+       if (rxq->devx_rq.rq != NULL)
                priv->obj_ops.rxq_obj_release(rxq);
-               LIST_REMOVE(rxq_ctrl->obj, next);
-               mlx5_free(rxq_ctrl->obj);
-               rxq_ctrl->obj = NULL;
+       if (free_ctrl) {
+               if (rxq_ctrl->obj != NULL) {
+                       LIST_REMOVE(rxq_ctrl->obj, next);
+                       mlx5_free(rxq_ctrl->obj);
+                       rxq_ctrl->obj = NULL;
+               }
+               rxq_ctrl->started = false;
        }
        if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
-               rxq_free_elts(rxq_ctrl);
+               if (free_ctrl)
+                       rxq_free_elts(rxq_ctrl);
                dev->data->rx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STOPPED;
        }
        if (!__atomic_load_n(&rxq->refcnt, __ATOMIC_RELAXED)) {
-               if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
-                       mlx5_mr_btree_free(&rxq_ctrl->rxq.mr_ctrl.cache_bh);
-                       mlx5_mprq_free_mp(dev, rxq_ctrl);
-               }
                LIST_REMOVE(rxq, owner_entry);
-               LIST_REMOVE(rxq_ctrl, next);
-               mlx5_free(rxq_ctrl);
+               if (free_ctrl) {
+                       if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
+                               mlx5_mr_btree_free
+                                       (&rxq_ctrl->rxq.mr_ctrl.cache_bh);
+                               mlx5_mprq_free_mp(dev, rxq_ctrl);
+                       }
+                       if (rxq_ctrl->rxq.shared)
+                               LIST_REMOVE(rxq_ctrl, share_entry);
+                       LIST_REMOVE(rxq_ctrl, next);
+                       mlx5_free(rxq_ctrl);
+               }
                dev->data->rx_queues[idx] = NULL;
                mlx5_free(rxq);
                (*priv->rxq_privs)[idx] = NULL;
diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 1e865e74e39..2fd8c70cce5 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -122,6 +122,46 @@ mlx5_rxq_stop(struct rte_eth_dev *dev)
                mlx5_rxq_release(dev, i);
 }
 
+static int
+mlx5_rxq_ctrl_prepare(struct rte_eth_dev *dev, struct mlx5_rxq_ctrl *rxq_ctrl,
+                     unsigned int idx)
+{
+       int ret = 0;
+
+       if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
+               if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq)) {
+                       /* Allocate/reuse/resize mempool for MPRQ. */
+                       if (mlx5_mprq_alloc_mp(dev, rxq_ctrl) < 0)
+                               return -rte_errno;
+
+                       /* Pre-register Rx mempools. */
+                       mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl,
+                                         rxq_ctrl->rxq.mprq_mp);
+               } else {
+                       uint32_t s;
+                       for (s = 0; s < rxq_ctrl->rxq.rxseg_n; s++)
+                               mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl,
+                                                 rxq_ctrl->rxq.rxseg[s].mp);
+               }
+               ret = rxq_alloc_elts(rxq_ctrl);
+               if (ret)
+                       return ret;
+       }
+       MLX5_ASSERT(!rxq_ctrl->obj);
+       rxq_ctrl->obj = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO,
+                                   sizeof(*rxq_ctrl->obj), 0,
+                                   rxq_ctrl->socket);
+       if (!rxq_ctrl->obj) {
+               DRV_LOG(ERR, "Port %u Rx queue %u can't allocate resources.",
+                       dev->data->port_id, idx);
+               rte_errno = ENOMEM;
+               return -rte_errno;
+       }
+       DRV_LOG(DEBUG, "Port %u rxq %u updated with %p.", dev->data->port_id,
+               idx, (void *)&rxq_ctrl->obj);
+       return 0;
+}
+
 /**
  * Start traffic on Rx queues.
  *
@@ -149,45 +189,17 @@ mlx5_rxq_start(struct rte_eth_dev *dev)
                if (rxq == NULL)
                        continue;
                rxq_ctrl = rxq->ctrl;
-               if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
-                       if (mlx5_rxq_mprq_enabled(&rxq_ctrl->rxq)) {
-                               /* Allocate/reuse/resize mempool for MPRQ. */
-                               if (mlx5_mprq_alloc_mp(dev, rxq_ctrl) < 0)
-                                       goto error;
-                               /* Pre-register Rx mempools. */
-                               mlx5_mr_update_mp(dev, &rxq_ctrl->rxq.mr_ctrl,
-                                                 rxq_ctrl->rxq.mprq_mp);
-                       } else {
-                               uint32_t s;
-
-                               for (s = 0; s < rxq_ctrl->rxq.rxseg_n; s++)
-                                       mlx5_mr_update_mp
-                                               (dev, &rxq_ctrl->rxq.mr_ctrl,
-                                               rxq_ctrl->rxq.rxseg[s].mp);
-                       }
-                       ret = rxq_alloc_elts(rxq_ctrl);
-                       if (ret)
+               if (!rxq_ctrl->started) {
+                       if (mlx5_rxq_ctrl_prepare(dev, rxq_ctrl, i) < 0)
                                goto error;
-               }
-               MLX5_ASSERT(!rxq_ctrl->obj);
-               rxq_ctrl->obj = mlx5_malloc(MLX5_MEM_RTE | MLX5_MEM_ZERO,
-                                           sizeof(*rxq_ctrl->obj), 0,
-                                           rxq_ctrl->socket);
-               if (!rxq_ctrl->obj) {
-                       DRV_LOG(ERR,
-                               "Port %u Rx queue %u can't allocate resources.",
-                               dev->data->port_id, i);
-                       rte_errno = ENOMEM;
-                       goto error;
+                       LIST_INSERT_HEAD(&priv->rxqsobj, rxq_ctrl->obj, next);
+                       rxq_ctrl->started = true;
                }
                ret = priv->obj_ops.rxq_obj_new(rxq);
                if (ret) {
                        mlx5_free(rxq_ctrl->obj);
                        goto error;
                }
-               DRV_LOG(DEBUG, "Port %u rxq %u updated with %p.",
-                       dev->data->port_id, i, (void *)&rxq_ctrl->obj);
-               LIST_INSERT_HEAD(&priv->rxqsobj, rxq_ctrl->obj, next);
        }
        return 0;
 error:
-- 
2.33.0

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