From: Didier Pallard Date: Tue, 17 Nov 2020 11:26:47 +0000 (+0100) Subject: net/mlx5: fix Rx descriptor status X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=7c085d3a4a06b60cd04a408d7edf4e9382172a42;hp=9ae9720d7f0c12f877df9214f7cbedae546d4020;p=dpdk.git net/mlx5: fix Rx descriptor status Three bugs in rx_queue_count function: - One entry may contain several segments, so 'used' must be multiplied by number of segments per entry to properly reflect the queue usage. - The number of cqes is equals to (1U << rxq->elts_n) - 1 in SPRQ mode. The range returned by rx_queue_count should be the number of entries used in queue, so it ranges from 0 to max number of entries in queue, not this number minus one. - For MPRQ mode, we need to take into account of the number of strd. Fixes: 8788fec1f269 ("net/mlx5: implement descriptor status API") Cc: stable@dpdk.org Signed-off-by: Didier Pallard Signed-off-by: Maxime Leroy Acked-by: Viacheslav Ovsiienko --- diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c index 2733dcd3ff..2ecf901fb1 100644 --- a/drivers/net/mlx5/mlx5_rxtx.c +++ b/drivers/net/mlx5/mlx5_rxtx.c @@ -463,6 +463,9 @@ rx_queue_count(struct mlx5_rxq_data *rxq) struct rxq_zip *zip = &rxq->zip; volatile struct mlx5_cqe *cqe; const unsigned int cqe_n = (1 << rxq->cqe_n); + const unsigned int sges_n = (1 << rxq->sges_n); + const unsigned int elts_n = (1 << rxq->elts_n); + const unsigned int strd_n = (1 << rxq->strd_num_n); const unsigned int cqe_cnt = cqe_n - 1; unsigned int cq_ci, used; @@ -488,7 +491,7 @@ rx_queue_count(struct mlx5_rxq_data *rxq) used += n; cqe = &(*rxq->cqes)[cq_ci & cqe_cnt]; } - used = RTE_MIN(used, cqe_n); + used = RTE_MIN(used * sges_n, elts_n * strd_n); return used; }