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>
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21511abd0a
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@ -64,13 +64,7 @@ static void mlx4_ib_cq_event(struct mlx4_cq *cq, enum mlx4_event type)
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static void *get_cqe_from_buf(struct mlx4_ib_cq_buf *buf, int n)
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{
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int offset = n * sizeof (struct mlx4_cqe);
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if (buf->buf.nbufs == 1)
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return buf->buf.u.direct.buf + offset;
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else
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return buf->buf.u.page_list[offset >> PAGE_SHIFT].buf +
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(offset & (PAGE_SIZE - 1));
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return mlx4_buf_offset(&buf->buf, n * sizeof (struct mlx4_cqe));
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}
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static void *get_cqe(struct mlx4_ib_cq *cq, int n)
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@ -96,11 +96,7 @@ static int is_qp0(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp)
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static void *get_wqe(struct mlx4_ib_qp *qp, int offset)
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{
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if (qp->buf.nbufs == 1)
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return qp->buf.u.direct.buf + offset;
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else
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return qp->buf.u.page_list[offset >> PAGE_SHIFT].buf +
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(offset & (PAGE_SIZE - 1));
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return mlx4_buf_offset(&qp->buf, offset);
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}
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static void *get_recv_wqe(struct mlx4_ib_qp *qp, int n)
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@ -38,13 +38,7 @@
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static void *get_wqe(struct mlx4_ib_srq *srq, int n)
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{
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int offset = n << srq->msrq.wqe_shift;
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if (srq->buf.nbufs == 1)
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return srq->buf.u.direct.buf + offset;
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else
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return srq->buf.u.page_list[offset >> PAGE_SHIFT].buf +
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(offset & (PAGE_SIZE - 1));
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return mlx4_buf_offset(&srq->buf, n << srq->msrq.wqe_shift);
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}
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static void mlx4_ib_srq_event(struct mlx4_srq *srq, enum mlx4_event type)
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@ -308,6 +308,14 @@ struct mlx4_init_port_param {
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int mlx4_buf_alloc(struct mlx4_dev *dev, int size, int max_direct,
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struct mlx4_buf *buf);
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void mlx4_buf_free(struct mlx4_dev *dev, int size, struct mlx4_buf *buf);
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static inline void *mlx4_buf_offset(struct mlx4_buf *buf, int offset)
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{
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if (buf->nbufs == 1)
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return buf->u.direct.buf + offset;
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else
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return buf->u.page_list[offset >> PAGE_SHIFT].buf +
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(offset & (PAGE_SIZE - 1));
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}
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int mlx4_pd_alloc(struct mlx4_dev *dev, u32 *pdn);
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void mlx4_pd_free(struct mlx4_dev *dev, u32 pdn);
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