Commit 350b4c8a authored Dec 11, 2018 by Yuval Shaia Committed by Jason Gunthorpe Dec 18, 2018

IB/mlx4: Utilize macro to calculate SQ spare size



The macro MLX4_IB_SQ_HEADROOM calculates the spare room needed to be
left. Use it instead of hard-coding the HW prefetch size.

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

parent e9dfa53a

drivers/infiniband/hw/mlx4/qp.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -401,7 +401,7 @@ static int set_kernel_sq_size(struct mlx4_ib_dev dev, struct ib_qp_cap cap,
		* We need to leave 2 KB + 1 WR of headroom in the SQ to
		* allow HW to prefetch.
		*/
		qp->sq_spare_wqes = (2048 >> qp->sq.wqe_shift) + 1;
		qp->sq_spare_wqes = MLX4_IB_SQ_HEADROOM(qp->sq.wqe_shift);
		qp->sq.wqe_cnt = roundup_pow_of_two(cap->max_send_wr +
		qp->sq_spare_wqes);

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