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IB/mlx5: Allow scatter to CQE without global signaled WRs

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Requester scatter to CQE is restricted to QPs configured to signal
all WRs.

This patch adds ability to enable scatter to cqe (force enable)
in the requester without sig_all, for users who do not want all WRs
signaled but rather just the ones whose data found in the CQE.

Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Guy Levi <guyle@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Yonatan Cohen 2018-10-09 12:05:15 +03:00 committed by Doug Ledford
parent 2e43bb31b8
commit 6f4bc0ea68
2 changed files with 12 additions and 3 deletions
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14
drivers/infiniband/hw/mlx5/qp.c
View File

@ -1706,15 +1706,20 @@ static void configure_responder_scat_cqe(struct ib_qp_init_attr *init_attr,
static void configure_requester_scat_cqe(struct mlx5_ib_dev *dev,
struct ib_qp_init_attr *init_attr,
struct mlx5_ib_create_qp *ucmd,
void *qpc)
{
enum ib_qp_type qpt = init_attr->qp_type;
int scqe_sz;
bool allow_scat_cqe = 0;
if (qpt == IB_QPT_UC || qpt == IB_QPT_UD)
return;
if (init_attr->sq_sig_type != IB_SIGNAL_ALL_WR)
if (ucmd)
allow_scat_cqe = ucmd->flags & MLX5_QP_FLAG_ALLOW_SCATTER_CQE;
if (!allow_scat_cqe && init_attr->sq_sig_type != IB_SIGNAL_ALL_WR)
return;
scqe_sz = mlx5_ib_get_cqe_size(init_attr->send_cq);
@ -1836,7 +1841,8 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
MLX5_QP_FLAG_TUNNEL_OFFLOADS |
MLX5_QP_FLAG_BFREG_INDEX |
MLX5_QP_FLAG_TYPE_DCT |
MLX5_QP_FLAG_TYPE_DCI))
MLX5_QP_FLAG_TYPE_DCI |
MLX5_QP_FLAG_ALLOW_SCATTER_CQE))
return -EINVAL;
err = get_qp_user_index(to_mucontext(pd->uobject->context),
@ -1971,7 +1977,9 @@ static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd,
if (qp->scat_cqe && is_connected(init_attr->qp_type)) {
configure_responder_scat_cqe(init_attr, qpc);
configure_requester_scat_cqe(dev, init_attr, qpc);
configure_requester_scat_cqe(dev, init_attr,
(pd && pd->uobject) ? &ucmd : NULL,
qpc);
}
if (qp->rq.wqe_cnt) {

1
include/uapi/rdma/mlx5-abi.h
View File

@ -47,6 +47,7 @@ enum {
MLX5_QP_FLAG_TYPE_DCI = 1 << 5,
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_UC = 1 << 6,
MLX5_QP_FLAG_TIR_ALLOW_SELF_LB_MC = 1 << 7,
MLX5_QP_FLAG_ALLOW_SCATTER_CQE = 1 << 8,
};
enum {