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net/mlx5: Use u16 for Work Queue buffer fragment size 

Minimal stride size is 16.
Hence, the number of strides in a fragment (of PAGE_SIZE)
is <= PAGE_SIZE / 16 <= 4K.

u16 is sufficient to represent this.

Fixes: 388ca8be00 ("IB/mlx5: Implement fragmented completion queue (CQ)")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2018-08-21 16:04:41 +03:00 committed by Saeed Mahameed
parent 5df816e7f4
commit 8d71e81850
3 changed files with 4 additions and 4 deletions
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4
drivers/net/ethernet/mellanox/mlx5/core/wq.c
View File

@ -39,9 +39,9 @@ u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq)
return (u32)wq->fbc.sz_m1 + 1;
}
u32 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq)
u16 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq)
{
return (u32)wq->fbc.frag_sz_m1 + 1;
return wq->fbc.frag_sz_m1 + 1;
}
u32 mlx5_cqwq_get_size(struct mlx5_cqwq *wq)

2
drivers/net/ethernet/mellanox/mlx5/core/wq.h
View File

@ -80,7 +80,7 @@ int mlx5_wq_cyc_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *wqc, struct mlx5_wq_cyc *wq,
struct mlx5_wq_ctrl *wq_ctrl);
u32 mlx5_wq_cyc_get_size(struct mlx5_wq_cyc *wq);
u32 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq);
u16 mlx5_wq_cyc_get_frag_size(struct mlx5_wq_cyc *wq);
int mlx5_wq_qp_create(struct mlx5_core_dev *mdev, struct mlx5_wq_param *param,
void *qpc, struct mlx5_wq_qp *wq,

2
include/linux/mlx5/driver.h
View File

@ -362,7 +362,7 @@ struct mlx5_frag_buf {
struct mlx5_frag_buf_ctrl {
struct mlx5_frag_buf frag_buf;
u32 sz_m1;
u32 frag_sz_m1;
u16 frag_sz_m1;
u32 strides_offset;
u8 log_sz;
u8 log_stride;