[PATCH] net/mlx5: fix assert failure on hairpin queue release

[PATCH] net/mlx5: fix assert failure on hairpin queue release

[Maayan Kashani]

Assert was triggered because of ctrl_ref mismatch on hairpin queue.
Fixed the mismatch.

Fixes: 09c2555 ("net/mlx5: support shared Rx queue")
Cc: stable@dpdk.org

Signed-off-by: Maayan Kashani <mkashani@nvidia.com>
Acked-by: Dariusz Sosnowski <dsosnowski@nvidia.com>
---
 drivers/net/mlx5/mlx5.h      |  1 +
 drivers/net/mlx5/mlx5_flow.c |  4 ++--
 drivers/net/mlx5/mlx5_rx.h   |  1 +
 drivers/net/mlx5/mlx5_rxq.c  | 12 ++++++++----
 4 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
index 545ba48b3cd..6df99c25e2f 100644
--- a/drivers/net/mlx5/mlx5.h
+++ b/drivers/net/mlx5/mlx5.h
@@ -2023,6 +2023,7 @@ struct mlx5_priv {
 	uint32_t ctrl_flows; /* Control flow rules. */
 	rte_spinlock_t flow_list_lock;
 	struct mlx5_obj_ops obj_ops; /* HW objects operations. */
+	LIST_HEAD(rxq, mlx5_rxq_ctrl) rxqsctrl; /* DPDK Rx queues. */
 	LIST_HEAD(rxqobj, mlx5_rxq_obj) rxqsobj; /* Verbs/DevX Rx queues. */
 	struct mlx5_list *hrxqs; /* Hash Rx queues. */
 	LIST_HEAD(txq, mlx5_txq_ctrl) txqsctrl; /* DPDK Tx queues. */
diff --git a/drivers/net/mlx5/mlx5_flow.c b/drivers/net/mlx5/mlx5_flow.c
index f8b3e504b35..6169ebc13f6 100644
--- a/drivers/net/mlx5/mlx5_flow.c
+++ b/drivers/net/mlx5/mlx5_flow.c
@@ -1648,13 +1648,13 @@ flow_rxq_mark_flag_set(struct rte_eth_dev *dev)
 			    opriv->domain_id != priv->domain_id ||
 			    opriv->mark_enabled)
 				continue;
-			LIST_FOREACH(rxq_ctrl, &opriv->sh->shared_rxqs, share_entry) {
+			LIST_FOREACH(rxq_ctrl, &opriv->rxqsctrl, next) {
 				rxq_ctrl->rxq.mark = 1;
 			}
 			opriv->mark_enabled = 1;
 		}
 	} else {
-		LIST_FOREACH(rxq_ctrl, &priv->sh->shared_rxqs, share_entry) {
+		LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) {
 			rxq_ctrl->rxq.mark = 1;
 		}
 		priv->mark_enabled = 1;
diff --git a/drivers/net/mlx5/mlx5_rx.h b/drivers/net/mlx5/mlx5_rx.h
index f80a2e32279..6380895502e 100644
--- a/drivers/net/mlx5/mlx5_rx.h
+++ b/drivers/net/mlx5/mlx5_rx.h
@@ -169,6 +169,7 @@ struct __rte_cache_aligned mlx5_rxq_data {
 /* RX queue control descriptor. */
 struct mlx5_rxq_ctrl {
 	struct mlx5_rxq_data rxq; /* Data path structure. */
+	LIST_ENTRY(mlx5_rxq_ctrl) next; /* Pointer to the next element. */
 	LIST_HEAD(priv, mlx5_rxq_priv) owners; /* Owner rxq list. */
 	struct mlx5_rxq_obj *obj; /* Verbs/DevX elements. */
 	struct mlx5_dev_ctx_shared *sh; /* Shared context. */
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index a5971b5cdda..5cf7d4971b3 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -1037,6 +1037,7 @@ mlx5_rx_hairpin_queue_setup(struct rte_eth_dev *dev, uint16_t idx,
 		rte_errno = ENOMEM;
 		return -rte_errno;
 	}
+	rte_atomic_fetch_add_explicit(&rxq_ctrl->ctrl_ref, 1, rte_memory_order_relaxed);
 	DRV_LOG(DEBUG, "port %u adding hairpin Rx queue %u to list",
 		dev->data->port_id, idx);
 	dev->data->rx_queues[idx] = &rxq_ctrl->rxq;
@@ -2006,8 +2007,9 @@ mlx5_rxq_new(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
 		tmpl->rxq.shared = 1;
 		tmpl->share_group = conf->share_group;
 		tmpl->share_qid = conf->share_qid;
+		LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry);
 	}
-	LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry);
+	LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next);
 	rte_atomic_store_explicit(&tmpl->ctrl_ref, 1, rte_memory_order_relaxed);
 	return tmpl;
 error:
@@ -2061,7 +2063,7 @@ mlx5_rxq_hairpin_new(struct rte_eth_dev *dev, struct mlx5_rxq_priv *rxq,
 	tmpl->rxq.idx = idx;
 	rxq->hairpin_conf = *hairpin_conf;
 	mlx5_rxq_ref(dev, idx);
-	LIST_INSERT_HEAD(&priv->sh->shared_rxqs, tmpl, share_entry);
+	LIST_INSERT_HEAD(&priv->rxqsctrl, tmpl, next);
 	rte_atomic_store_explicit(&tmpl->ctrl_ref, 1, rte_memory_order_relaxed);
 	return tmpl;
 }
@@ -2336,7 +2338,9 @@ mlx5_rxq_release(struct rte_eth_dev *dev, uint16_t idx)
 			if (!rxq_ctrl->is_hairpin)
 				mlx5_mr_btree_free
 					(&rxq_ctrl->rxq.mr_ctrl.cache_bh);
-			LIST_REMOVE(rxq_ctrl, share_entry);
+			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;
@@ -2362,7 +2366,7 @@ mlx5_rxq_verify(struct rte_eth_dev *dev)
 	struct mlx5_rxq_ctrl *rxq_ctrl;
 	int ret = 0;
 
-	LIST_FOREACH(rxq_ctrl, &priv->sh->shared_rxqs, share_entry) {
+	LIST_FOREACH(rxq_ctrl, &priv->rxqsctrl, next) {
 		DRV_LOG(DEBUG, "port %u Rx Queue %u still referenced",
 			dev->data->port_id, rxq_ctrl->rxq.idx);
 		++ret;
-- 
2.21.0