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

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First ASO WQE causes to cache miss in hardware, which can't return
result immediately. It causes to the situation where such WQE is polled
earlier than it is needed. Add logic to retry ASO CQ polling operation.

Link: https://lore.kernel.org/r/eb92a758c533ff3f058e0dcb4f8d2324355304ad.1680162300.git.leonro@nvidia.com
Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
This commit is contained in:
Leon Romanovsky 2023-03-30 11:02:25 +03:00
parent d05971a413
commit 76e463f650
1 changed files with 7 additions and 1 deletions
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8
drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
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@ -568,6 +568,7 @@ int mlx5e_ipsec_aso_query(struct mlx5e_ipsec_sa_entry *sa_entry,
struct mlx5_wqe_aso_ctrl_seg *ctrl;
struct mlx5e_hw_objs *res;
struct mlx5_aso_wqe *wqe;
unsigned long expires;
u8 ds_cnt;
int ret;
@ -589,7 +590,12 @@ int mlx5e_ipsec_aso_query(struct mlx5e_ipsec_sa_entry *sa_entry,
mlx5e_ipsec_aso_copy(ctrl, data);
mlx5_aso_post_wqe(aso->aso, false, &wqe->ctrl);
ret = mlx5_aso_poll_cq(aso->aso, false);
expires = jiffies + msecs_to_jiffies(10);
do {
ret = mlx5_aso_poll_cq(aso->aso, false);
if (ret)
usleep_range(2, 10);
} while (ret && time_is_after_jiffies(expires));
spin_unlock_bh(&aso->lock);
return ret;
}