[dpdk-dev] [PATCH] net/mlx5: fix Tx queue stop state

[Matan Azrad <matan@nvidia.com>]

The Tx queue stop API doesn't call the PMD callback when the state of
the queue is stopped.
The drivers should update the state to be stopped when the queue stop
callback is done successfully or when the port is stopped.
The drivers should update the state to be started when the queue start
callback is done successfully or when the port is started.

The driver wrongly didn't update the state to be started when the port
start callback was done what remained the state as stopped.
Following call to a queue stop API was not completed by ethdev layer
because the state is already stopped.

Move the state update from the Tx queue setup to the port start
callback.

Fixes: 161d103b231c ("net/mlx5: add queue start and stop")
Cc: stable@dpdk.org

Signed-off-by: Matan Azrad <matan@nvidia.com>
---
 drivers/net/mlx5/linux/mlx5_verbs.c | 1 +
 drivers/net/mlx5/mlx5_devx.c        | 1 +
 drivers/net/mlx5/mlx5_rxq.c         | 4 +++-
 drivers/net/mlx5/mlx5_trigger.c     | 1 +
 drivers/net/mlx5/mlx5_txq.c         | 3 +--
 5 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/linux/mlx5_verbs.c b/drivers/net/mlx5/linux/mlx5_verbs.c
index 494ddba..540ce32 100644
--- a/drivers/net/mlx5/linux/mlx5_verbs.c
+++ b/drivers/net/mlx5/linux/mlx5_verbs.c
@@ -1038,6 +1038,7 @@
 		goto error;
 	}
 	txq_uar_init(txq_ctrl);
+	dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STARTED;
 	priv->verbs_alloc_ctx.type = MLX5_VERBS_ALLOC_TYPE_NONE;
 	return 0;
 error:
diff --git a/drivers/net/mlx5/mlx5_devx.c b/drivers/net/mlx5/mlx5_devx.c
index b3acbc2..2888977 100644
--- a/drivers/net/mlx5/mlx5_devx.c
+++ b/drivers/net/mlx5/mlx5_devx.c
@@ -1427,6 +1427,7 @@
 	txq_ctrl->uar_mmap_offset =
 				mlx5_os_get_devx_uar_mmap_offset(sh->tx_uar);
 	txq_uar_init(txq_ctrl);
+	dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STARTED;
 	return 0;
 error:
 	ret = rte_errno; /* Save rte_errno before cleanup. */
diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
index a733eda..88c0151 100644
--- a/drivers/net/mlx5/mlx5_rxq.c
+++ b/drivers/net/mlx5/mlx5_rxq.c
@@ -1773,8 +1773,10 @@ struct mlx5_rxq_ctrl *
 		mlx5_free(rxq_ctrl->obj);
 		rxq_ctrl->obj = NULL;
 	}
-	if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD)
+	if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD) {
 		rxq_free_elts(rxq_ctrl);
+		dev->data->rx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STOPPED;
+	}
 	if (!__atomic_load_n(&rxq_ctrl->refcnt, __ATOMIC_RELAXED)) {
 		if (rxq_ctrl->type == MLX5_RXQ_TYPE_STANDARD)
 			mlx5_mr_btree_free(&rxq_ctrl->rxq.mr_ctrl.cache_bh);
diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index 52691b6..4b6e17e 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -77,6 +77,7 @@
 		}
 		if (txq_ctrl->type == MLX5_TXQ_TYPE_STANDARD) {
 			size_t size = txq_data->cqe_s * sizeof(*txq_data->fcqs);
+
 			txq_data->fcqs = mlx5_malloc(flags, size,
 						     RTE_CACHE_LINE_SIZE,
 						     txq_ctrl->socket);
diff --git a/drivers/net/mlx5/mlx5_txq.c b/drivers/net/mlx5/mlx5_txq.c
index e1291f0..6390cd0 100644
--- a/drivers/net/mlx5/mlx5_txq.c
+++ b/drivers/net/mlx5/mlx5_txq.c
@@ -388,7 +388,6 @@
 	DRV_LOG(DEBUG, "port %u adding Tx queue %u to list",
 		dev->data->port_id, idx);
 	(*priv->txqs)[idx] = &txq_ctrl->txq;
-	dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STARTED;
 	return 0;
 }
 
@@ -1249,8 +1248,8 @@ struct mlx5_txq_ctrl *
 			txq_ctrl->txq.fcqs = NULL;
 		}
 		txq_free_elts(txq_ctrl);
+		dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 	}
-	dev->data->tx_queue_state[idx] = RTE_ETH_QUEUE_STATE_STOPPED;
 	if (!__atomic_load_n(&txq_ctrl->refcnt, __ATOMIC_RELAXED)) {
 		if (txq_ctrl->type == MLX5_TXQ_TYPE_STANDARD)
 			mlx5_mr_btree_free(&txq_ctrl->txq.mr_ctrl.cache_bh);
-- 
1.8.3.1