From: Tariq Toukan Date: Sun, 11 Feb 2018 09:58:30 +0000 (+0200) Subject: net/mlx5e: Disable Striding RQ when PCI is slower than link X-Git-Tag: v5.15~9146^2~65^2~13 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=291f445eab9b2b11c8dd05ae1a0943c328cb9b6b;p=platform%2Fkernel%2Flinux-starfive.git net/mlx5e: Disable Striding RQ when PCI is slower than link We turn the feature off for servers with PCI BW bounded by a threshold (16G) and lower than MAX LINK BW. This improves the effectiveness of CQE compression feature, that is defaulted to ON for the same case. Signed-off-by: Tariq Toukan Signed-off-by: Saeed Mahameed --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index 4670782..d4dd000 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -113,13 +113,16 @@ void mlx5e_init_rq_type_params(struct mlx5_core_dev *mdev, MLX5E_GET_PFLAG(params, MLX5E_PFLAG_RX_CQE_COMPRESS)); } +static bool slow_pci_heuristic(struct mlx5_core_dev *mdev); + static void mlx5e_set_rq_params(struct mlx5_core_dev *mdev, struct mlx5e_params *params) { u8 rq_type = mlx5e_check_fragmented_striding_rq_cap(mdev) && - !params->xdp_prog && !MLX5_IPSEC_DEV(mdev) ? - MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ : - MLX5_WQ_TYPE_LINKED_LIST; + !slow_pci_heuristic(mdev) && + !params->xdp_prog && !MLX5_IPSEC_DEV(mdev) ? + MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ : + MLX5_WQ_TYPE_LINKED_LIST; mlx5e_init_rq_type_params(mdev, params, rq_type); }