android/android_kernel_samsung_sm8650
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net/mlx5e: Default to Striding RQ when not conflicting with CQE compression

Browse Source 
CQE compression is turned on by default on slow pci systems to help
reduce the load on pci.
In this case, Striding RQ was turned off as CQEs of packets that span
several strides were not compressed, significantly reducing the compression
effectiveness.
This issue does not exist when using the newer mini_cqe format "stride_index".
Hence, allow defaulting to Striding RQ in this case.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Tariq Toukan
2022-01-11 18:28:12 +02:00
committed by Saeed Mahameed
parent b98d2d722f
commit 1d5024f88d
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/net/ethernet/mellanox/mlx5/core/en/params.c
View File

@ -359,12 +359,13 @@ void mlx5e_build_rq_params(struct mlx5_core_dev *mdev,
{
/* Prefer Striding RQ, unless any of the following holds:
* - Striding RQ configuration is not possible/supported.
* - Slow PCI heuristic.
* - CQE compression is ON, and stride_index mini_cqe layout is not supported.
* - Legacy RQ would use linear SKB while Striding RQ would use non-linear.
*
* No XSK params: checking the availability of striding RQ in general.
*/
if (!slow_pci_heuristic(mdev) &&
if ((!MLX5E_GET_PFLAG(params, MLX5E_PFLAG_RX_CQE_COMPRESS) ||
MLX5_CAP_GEN(mdev, mini_cqe_resp_stride_index)) &&
mlx5e_striding_rq_possible(mdev, params) &&
(mlx5e_rx_mpwqe_is_linear_skb(mdev, params, NULL) ||
!mlx5e_rx_is_linear_skb(params, NULL)))