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* [PATCH] vdpa/mlx5: fix queue enable drain CQ
@ 2024-01-25  3:17 Yajun Wu
  2024-02-06 13:17 ` Maxime Coquelin
  2024-02-06 14:58 ` Maxime Coquelin
  0 siblings, 2 replies; 4+ messages in thread
From: Yajun Wu @ 2024-01-25  3:17 UTC (permalink / raw)
  To: matan, maxime.coquelin, Viacheslav Ovsiienko
  Cc: dev, thomas, mkashani, stable

For the case: `ethtool -L eth0 combined xxx` in VM, VQ will disable
and enable without calling device close. In such case, need add
drain CQ before reuse/reset event QP.

Fixes: 24969c7b62 ("vdpa/mlx5: reuse event queues")
Cc: stable@dpdk.org

Signed-off-by: Yajun Wu <yajunw@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa_event.c | 29 +++++++++++++++++++----------
 1 file changed, 19 insertions(+), 10 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
index 9557c1042e..32430614d5 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
@@ -244,22 +244,30 @@ mlx5_vdpa_queues_complete(struct mlx5_vdpa_priv *priv)
 	return max;
 }
 
+static void
+mlx5_vdpa_drain_cq_one(struct mlx5_vdpa_priv *priv,
+	struct mlx5_vdpa_virtq *virtq)
+{
+	struct mlx5_vdpa_cq *cq = &virtq->eqp.cq;
+
+	mlx5_vdpa_queue_complete(cq);
+	if (cq->cq_obj.cq) {
+		cq->cq_obj.cqes[0].wqe_counter = rte_cpu_to_be_16(UINT16_MAX);
+		virtq->eqp.qp_pi = 0;
+		if (!cq->armed)
+			mlx5_vdpa_cq_arm(priv, cq);
+	}
+}
+
 void
 mlx5_vdpa_drain_cq(struct mlx5_vdpa_priv *priv)
 {
+	struct mlx5_vdpa_virtq *virtq;
 	unsigned int i;
 
 	for (i = 0; i < priv->caps.max_num_virtio_queues; i++) {
-		struct mlx5_vdpa_cq *cq = &priv->virtqs[i].eqp.cq;
-
-		mlx5_vdpa_queue_complete(cq);
-		if (cq->cq_obj.cq) {
-			cq->cq_obj.cqes[0].wqe_counter =
-				rte_cpu_to_be_16(UINT16_MAX);
-			priv->virtqs[i].eqp.qp_pi = 0;
-			if (!cq->armed)
-				mlx5_vdpa_cq_arm(priv, cq);
-		}
+		virtq = &priv->virtqs[i];
+		mlx5_vdpa_drain_cq_one(priv, virtq);
 	}
 }
 
@@ -632,6 +640,7 @@ mlx5_vdpa_event_qp_prepare(struct mlx5_vdpa_priv *priv, uint16_t desc_n,
 	if (eqp->cq.cq_obj.cq != NULL && log_desc_n == eqp->cq.log_desc_n) {
 		/* Reuse existing resources. */
 		eqp->cq.callfd = callfd;
+		mlx5_vdpa_drain_cq_one(priv, virtq);
 		/* FW will set event qp to error state in q destroy. */
 		if (reset && !mlx5_vdpa_qps2rst2rts(eqp))
 			rte_write32(rte_cpu_to_be_32(RTE_BIT32(log_desc_n)),
-- 
2.27.0


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2024-02-06 14:58 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-01-25  3:17 [PATCH] vdpa/mlx5: fix queue enable drain CQ Yajun Wu
2024-02-06 13:17 ` Maxime Coquelin
2024-02-06 14:06   ` Maxime Coquelin
2024-02-06 14:58 ` Maxime Coquelin

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