From 350b4c8ac1b4c07909ab7f8ad4303fff2505ab7c Mon Sep 17 00:00:00 2001 From: Yuval Shaia Date: Tue, 11 Dec 2018 10:36:47 +0200 Subject: 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 Reviewed-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe --- drivers/infiniband/hw/mlx4/qp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/infiniband/hw') diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 74ef7a0ec0b7..651d8594dc3f 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -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); -- cgit v1.2.3-59-g8ed1b