From 4cbb7558013a4f600eb1ca9ad34959d8912240e6 Mon Sep 17 00:00:00 2001 From: Tariq Toukan Date: Mon, 19 Jun 2017 18:36:30 +0300 Subject: [PATCH] net/mlx5e: NAPI busy-poll when UMR post is in progress If a UMR post is in progress, it means that there's a missing WQE in RQ, and that a completion will be shortly available in ICO SQ completion queue. Prefer busy-poll to handle it as soon as possible. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed --- drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c index fb3b83609aea..8af6577b7501 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c @@ -456,17 +456,16 @@ void mlx5e_dealloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix) mlx5e_free_rx_mpwqe(rq, wi); } -#define RQ_CANNOT_POST(rq) \ - (!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state) || \ - test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state)) - bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq) { struct mlx5_wq_ll *wq = &rq->wq; - if (unlikely(RQ_CANNOT_POST(rq))) + if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state))) return false; + if (test_bit(MLX5E_RQ_STATE_UMR_WQE_IN_PROGRESS, &rq->state)) + return true; + while (!mlx5_wq_ll_is_full(wq)) { struct mlx5e_rx_wqe *wqe = mlx5_wq_ll_get_wqe(wq, wq->head); int err; -- 2.20.1