[net-next 06/17] net/mlx5e: NAPI busy-poll when UMR post is in progress
From: Saeed Mahameed <hidden>
Date: 2017-09-03 04:22:11
Subsystem:
mellanox ethernet driver (mlx5e), mellanox mlx5 core vpi driver, networking drivers, the rest · Maintainers:
Saeed Mahameed, Tariq Toukan, Mark Bloch, Leon Romanovsky, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Tariq Toukan <redacted> 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 <redacted> Signed-off-by: Saeed Mahameed <redacted> --- 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;
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2.13.0