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IB/mlx4: Utilize macro to calculate SQ spare size

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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>
This commit is contained in:
Yuval Shaia 2018-12-11 10:36:47 +02:00 committed by Jason Gunthorpe
parent e9dfa53a39
commit 350b4c8ac1
1 changed files with 1 additions and 1 deletions
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2
drivers/infiniband/hw/mlx4/qp.c
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@ -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);