diff mbox series

[net-next,04/10] net/mlx5e: Overcome slow response for first IPsec ASO WQE

Message ID eb92a758c533ff3f058e0dcb4f8d2324355304ad.1680162300.git.leonro@nvidia.com (mailing list archive)
State Awaiting Upstream
Delegated to: Netdev Maintainers
Headers show
Series Improve IPsec limits, ESN and replay window in mlx5 | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 18 this patch: 18
netdev/cc_maintainers warning 2 maintainers not CCed: linux-rdma@vger.kernel.org borisp@nvidia.com
netdev/build_clang success Errors and warnings before: 18 this patch: 18
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 18 this patch: 18
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 20 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Leon Romanovsky March 30, 2023, 8:02 a.m. UTC 
From: Leon Romanovsky <leonro@nvidia.com>

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.

Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
---
 .../ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c  | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
index 684de9739e69..6971e5e36820 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ipsec_offload.c
@@ -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;
 }