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Commit 4cbb7558 authored by Tariq Toukan's avatar Tariq Toukan Committed by Saeed Mahameed
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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: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
parent 4c2af5cc

drivers/net/ethernet/mellanox/mlx5/core/en_rx.c

+4 −5
Original line number Diff line number Diff line
@@ -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;