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IB/mlx4: Consolidate code to get an entry from a struct mlx4_buf

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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>
This commit is contained in:
Roland Dreier
2008-02-06 21:07:54 -08:00
parent 21511abd0a
commit 1c69fc2a90
4 changed files with 11 additions and 19 deletions
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include/linux/mlx4/device.h
+8
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@@ -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);