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Commit fe65dfcc authored by Moshe Shemesh's avatar Moshe Shemesh Committed by Greg Kroah-Hartman
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net/mlx5e: RX, Verify MPWQE stride size is in range 



[ Upstream commit e1c15b62b7015119d3e5915cd2ae3b89d59c2576 ]

Add check of MPWQE stride size is within range supported by HW. In case
calculated MPWQE stride size exceed range, linear SKB can't be used and
we should use non linear MPWQE instead.

Fixes: 619a8f2a ("net/mlx5e: Use linear SKB in Striding RQ")
Signed-off-by: default avatarMoshe Shemesh <moshe@mellanox.com>
Reviewed-by: default avatarTariq Toukan <tariqt@mellanox.com>
Signed-off-by: default avatarSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 78512e34

drivers/net/ethernet/mellanox/mlx5/core/en_main.c

+5 −0
Original line number Diff line number Diff line
@@ -128,6 +128,8 @@ static bool mlx5e_rx_is_linear_skb(struct mlx5_core_dev *mdev, 
	return !params->lro_en && frag_sz <= PAGE_SIZE;

}



#define MLX5_MAX_MPWQE_LOG_WQE_STRIDE_SZ ((BIT(__mlx5_bit_sz(wq, log_wqe_stride_size)) - 1) + \

					  MLX5_MPWQE_LOG_STRIDE_SZ_BASE)

static bool mlx5e_rx_mpwqe_is_linear_skb(struct mlx5_core_dev *mdev,

					 struct mlx5e_params *params)

{
@@ -138,6 +140,9 @@ static bool mlx5e_rx_mpwqe_is_linear_skb(struct mlx5_core_dev *mdev, 
	if (!mlx5e_rx_is_linear_skb(mdev, params))

		return false;



	if (order_base_2(frag_sz) > MLX5_MAX_MPWQE_LOG_WQE_STRIDE_SZ)

		return false;



	if (MLX5_CAP_GEN(mdev, ext_stride_num_range))

		return true;