[PATCH rdma-next v2 08/15] net/mlx5: Enable relaxed ordering on resource dump mkey

[Michael Gur]

As resource dump logic reads data only following an event that is
delivered with strong ordering, there is no need for strong ordering of
its memory accesses.
Add relaxed ordering access flag to its registered memory, thus allowing
better performance and allowing resource dump on HW that restricts
strong ordering.

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxx>
Signed-off-by: Michael Gur <michaelgur@xxxxxxxxxx>
---
 drivers/net/ethernet/mellanox/mlx5/core/diag/rsc_dump.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/diag/rsc_dump.c b/drivers/net/ethernet/mellanox/mlx5/core/diag/rsc_dump.c
index 8044419fb5eb..5b88cd009472 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/diag/rsc_dump.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/diag/rsc_dump.c
@@ -236,6 +236,7 @@ static int mlx5_rsc_dump_create_mkey(struct mlx5_core_dev *mdev, u32 pdn,
 	MLX5_SET(mkc, mkc, access_mode_1_0, MLX5_MKC_ACCESS_MODE_PA);
 	MLX5_SET(mkc, mkc, lw, 1);
 	MLX5_SET(mkc, mkc, lr, 1);
+	mlx5_core_mkey_set_ordering(mdev, mkc, MLX5_MKEY_ORDER_RELAXED);
 
 	MLX5_SET(mkc, mkc, pd, pdn);
 	MLX5_SET(mkc, mkc, length64, 1);
-- 
2.52.0