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net/mlx5: Refactor fragmented buffer struct fields and init flow

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Take struct mlx5_frag_buf out of mlx5_frag_buf_ctrl, as it is not
needed to manage and control the datapath of the fragmented buffers API.

struct mlx5_frag_buf contains control info to manage the allocation
and de-allocation of the fragmented buffer.
Its fields are not relevant for datapath, so here I take them out of the
struct mlx5_frag_buf_ctrl, except for the fragments array itself.

In addition, modified mlx5_fill_fbc to initialise the frags pointers
as well. This implies that the buffer must be allocated before the
function is called.

A set of type-specific *_get_byte_size() functions are replaced by
a generic one.

Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Tariq Toukan 2018-09-12 15:36:41 +03:00 • committed by Saeed Mahameed
parent 3a3295bfa6
commit 4972e6fa3a
4 changed files with 69 additions and 105 deletions
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22
include/linux/mlx5/driver.h
View file

@ -357,7 +357,7 @@ struct mlx5_frag_buf {
};
struct mlx5_frag_buf_ctrl {
struct mlx5_frag_buf frag_buf;
struct mlx5_buf_list *frags;
u32 sz_m1;
u16 frag_sz_m1;
u16 strides_offset;
@ -994,10 +994,12 @@ static inline u32 mlx5_base_mkey(const u32 key)
return key & 0xffffff00u;
}
static inline void mlx5_fill_fbc_offset(u8 log_stride, u8 log_sz,
static inline void mlx5_init_fbc_offset(struct mlx5_buf_list *frags,
u8 log_stride, u8 log_sz,
u16 strides_offset,
struct mlx5_frag_buf_ctrl *fbc)
{
fbc->frags = frags;
fbc->log_stride = log_stride;
fbc->log_sz = log_sz;
fbc->sz_m1 = (1 << fbc->log_sz) - 1;
@ -1006,18 +1008,11 @@ static inline void mlx5_fill_fbc_offset(u8 log_stride, u8 log_sz,
fbc->strides_offset = strides_offset;
}
static inline void mlx5_fill_fbc(u8 log_stride, u8 log_sz,
static inline void mlx5_init_fbc(struct mlx5_buf_list *frags,
u8 log_stride, u8 log_sz,
struct mlx5_frag_buf_ctrl *fbc)
{
mlx5_fill_fbc_offset(log_stride, log_sz, 0, fbc);
}
static inline void mlx5_core_init_cq_frag_buf(struct mlx5_frag_buf_ctrl *fbc,
void *cqc)
{
mlx5_fill_fbc(6 + MLX5_GET(cqc, cqc, cqe_sz),
MLX5_GET(cqc, cqc, log_cq_size),
fbc);
mlx5_init_fbc_offset(frags, log_stride, log_sz, 0, fbc);
}
static inline void *mlx5_frag_buf_get_wqe(struct mlx5_frag_buf_ctrl *fbc,
@ -1028,8 +1023,7 @@ static inline void *mlx5_frag_buf_get_wqe(struct mlx5_frag_buf_ctrl *fbc,
ix += fbc->strides_offset;
frag = ix >> fbc->log_frag_strides;
return fbc->frag_buf.frags[frag].buf +
((fbc->frag_sz_m1 & ix) << fbc->log_stride);
return fbc->frags[frag].buf + ((fbc->frag_sz_m1 & ix) << fbc->log_stride);
}
int mlx5_cmd_init(struct mlx5_core_dev *dev);