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net/mlx5e: RX, Add checks for calculated Striding RQ attributes

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Striding RQ attributes below are mutually dependent. An unaware
change to one might take the others out of the valid range derived
by the HW caps:
- The MPWQE size in bytes
- The number of strides in a MPWQE
- The stride size

Add checks to verify they are valid and comply to the HW spec
and SW assumptions/requirements.
This is not a fix, no particular issue exists today.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
This commit is contained in:
Tariq Toukan 2020-06-21 21:35:34 +03:00 • committed by Saeed Mahameed
parent 6a5689ba02
commit 6980ffa0c5
4 changed files with 76 additions and 42 deletions
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7
include/linux/mlx5/device.h
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@ -911,8 +911,11 @@ static inline u16 get_cqe_flow_tag(struct mlx5_cqe64 *cqe)
return be32_to_cpu(cqe->sop_drop_qpn) & 0xFFF;
}
#define MLX5_MPWQE_LOG_NUM_STRIDES_BASE (9)
#define MLX5_MPWQE_LOG_STRIDE_SZ_BASE (6)
#define MLX5_MPWQE_LOG_NUM_STRIDES_EXT_BASE 3
#define MLX5_MPWQE_LOG_NUM_STRIDES_BASE 9
#define MLX5_MPWQE_LOG_NUM_STRIDES_MAX 16
#define MLX5_MPWQE_LOG_STRIDE_SZ_BASE 6
#define MLX5_MPWQE_LOG_STRIDE_SZ_MAX 13
struct mpwrq_cqe_bc {
__be16 filler_consumed_strides;