Commit 7e3fce82 authored by Emeel Hakim's avatar Emeel Hakim Committed by Saeed Mahameed
Browse files

net/mlx5e: Overcome slow response for first macsec ASO WQE 



First ASO WQE poll causes a cache miss in hardware hence the resut is
delayed. It causes to the situation where such WQE is polled earlier
than it is needed.

Add logic to retry ASO CQ polling operation.

Fixes: 739cfa34 ("net/mlx5: Make ASO poll CQ usable in atomic context") 
Signed-off-by: default avatarEmeel Hakim <ehakim@nvidia.com>
Reviewed-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Reviewed-by: default avatarRaed Salem <raeds@nvidia.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@nvidia.com>
parent 6e9d51b1

drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c

+8 −1
Original line number Diff line number Diff line
@@ -1412,6 +1412,7 @@ static int macsec_aso_query(struct mlx5_core_dev *mdev, struct mlx5e_macsec *mac 
	struct mlx5e_macsec_aso *aso;

	struct mlx5_aso_wqe *aso_wqe;

	struct mlx5_aso *maso;

	unsigned long expires;

	int err;



	aso = &macsec->aso;
@@ -1425,7 +1426,13 @@ static int macsec_aso_query(struct mlx5_core_dev *mdev, struct mlx5e_macsec *mac 
	macsec_aso_build_wqe_ctrl_seg(aso, &aso_wqe->aso_ctrl, NULL);



	mlx5_aso_post_wqe(maso, false, &aso_wqe->ctrl);

	expires = jiffies + msecs_to_jiffies(10);

	do {

		err = mlx5_aso_poll_cq(maso, false);

		if (err)

			usleep_range(2, 10);

	} while (err && time_is_after_jiffies(expires));



	if (err)

		goto err_out;