diff options
| author | Roland Dreier <rolandd@cisco.com> | 2008-02-06 21:07:54 -0800 |
|---|---|---|
| committer | Roland Dreier <rolandd@cisco.com> | 2008-02-06 21:07:54 -0800 |
| commit | 1c69fc2a9012e160c8d459f63df74a6b01db8322 (patch) | |
| tree | a32a2be6b2c8b9f5c4e006bacebc1eeb723e2ff5 /include/linux/mlx4 | |
| parent | 21511abd0a248a3f225d3b611cfabb93124605a7 (diff) | |
IB/mlx4: Consolidate code to get an entry from a struct mlx4_buf
We use struct mlx4_buf for kernel QP, CQ and SRQ buffers, and the code
to look up an entry is duplicated in get_cqe_from_buf() and the QP and
SRQ versions of get_wqe(). Factor this out into mlx4_buf_offset().
This will also make it easier to switch over to using vmap() for buffers.
Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'include/linux/mlx4')
| -rw-r--r-- | include/linux/mlx4/device.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h index 222815d91c40..a0afa7511a30 100644 --- a/include/linux/mlx4/device.h +++ b/include/linux/mlx4/device.h @@ -308,6 +308,14 @@ struct mlx4_init_port_param { int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct, struct mlx4_buf *buf); void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf); +static inline void *mlx4_buf_offset(struct mlx4_buf *buf, int offset) +{ + if (buf->nbufs == 1) + return buf->u.direct.buf + offset; + else + return buf->u.page_list[offset >> PAGE_SHIFT].buf + + (offset & (PAGE_SIZE - 1)); +} int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn); void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn); |