diff mbox series

[net-next,08/15] net/mlx5: DR, Fix QP continuous allocation

Message ID 20230414220939.136865-9-saeed@kernel.org (mailing list archive)
State Accepted
Commit 17dc71c336aac381f59ba541cf85fb0c192d1c1c
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/15] net/mlx5: DR, Move ACTION_CACHE_LINE_SIZE macro to header | expand

Checks

Context Check Description
netdev/series_format success Pull request is its own cover letter
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 success CCed 5 of 5 maintainers
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, 8 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Saeed Mahameed April 14, 2023, 10:09 p.m. UTC 
From: Yevgeny Kliteynik <kliteyn@nvidia.com>

When allocating a QP we allocate an RQ and an SQ, the RQ is stored first
in memory and followed by the SQ.
This allocation is not physically continiuos - it may span across different
physical pages. SW Steering code always writes in pairs: 1BB write + 1BB read,
or 2 continuous BBs of GTA WQE.

This lead to an issue where RQ allocation was 4x16 which is equal to 1 WQE BB,
causing 1 BB offset in the page and splitting the GTA WQE between different
physical pages.

The solution was to create the RQ with a even number of BBs and to have the
RQ aligned to a page.

Signed-off-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
index d052d469d4df..4a5ae86e2b62 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_send.c
@@ -267,7 +267,7 @@  static struct mlx5dr_qp *dr_create_rc_qp(struct mlx5_core_dev *mdev,
 
 	dr_qp->rq.pc = 0;
 	dr_qp->rq.cc = 0;
-	dr_qp->rq.wqe_cnt = 4;
+	dr_qp->rq.wqe_cnt = 256;
 	dr_qp->sq.pc = 0;
 	dr_qp->sq.cc = 0;
 	dr_qp->sq.head = 0;