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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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8
drivers/infiniband/hw/mlx4/cq.c
View file

@ -64,13 +64,7 @@ static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
{
int offset = n * sizeof (struct mlx4_cqe);
if (buf->buf.nbufs == 1)
return buf->buf.u.direct.buf + offset;
else
return buf->buf.u.page_list[offset >> PAGE_SHIFT].buf +
(offset & (PAGE_SIZE - 1));
return mlx4_buf_offset(&buf->buf, n * sizeof (struct mlx4_cqe));
}
static void *get_cqe(struct mlx4_ib_cq *cq, int n)

6
drivers/infiniband/hw/mlx4/qp.c
View file

@ -96,11 +96,7 @@ static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
{
if (qp->buf.nbufs == 1)
return qp->buf.u.direct.buf + offset;
else
return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf +
(offset & (PAGE_SIZE - 1));
return mlx4_buf_offset(&qp->buf, offset);
}
static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)

8
drivers/infiniband/hw/mlx4/srq.c
View file

@ -38,13 +38,7 @@
static void *get_wqe(struct mlx4_ib_srq *srq, int n)
{
int offset = n << srq->msrq.wqe_shift;
if (srq->buf.nbufs == 1)
return srq->buf.u.direct.buf + offset;
else
return srq->buf.u.page_list[offset >> PAGE_SHIFT].buf +
(offset & (PAGE_SIZE - 1));
return mlx4_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);
}
static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type)

8
include/linux/mlx4/device.h
View file

@ -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);