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authorEmeel Hakim <ehakim@nvidia.com>2023-03-20 13:13:55 +0200
committerSaeed Mahameed <saeedm@nvidia.com>2023-03-21 14:06:32 -0700
commit7e3fce82d945cf6e7f99034b113ff2d250d7524d (patch)
treee17370fda4a742e905f9d19704bcdfd917991011 /drivers/net
parent6e9d51b1a5cb8d750c3daf89db4f4cdfd1051819 (diff)
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: 739cfa34518e ("net/mlx5: Make ASO poll CQ usable in atomic context")  Signed-off-by: Emeel Hakim <ehakim@nvidia.com> Reviewed-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Raed Salem <raeds@nvidia.com> Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
index 8af53178e40d..33b3620ea45c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/macsec.c
@@ -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);
- err = mlx5_aso_poll_cq(maso, false);
+ 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;