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RDMA/nes: Adding queue drain functions 

Adding sq and rq drain functions, which block until all
previously posted wr-s in the specified queue have completed.
A completion object is signaled to unblock the thread,
when the last cqe for the corresponding queue is processed.

Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Faisal Latif <faisal.latif@intel.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Tatyana Nikolova 2016-03-29 12:58:37 -05:00 committed by Doug Ledford
parent 825107a237
commit 1997412db6
2 changed files with 36 additions and 0 deletions
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34
drivers/infiniband/hw/nes/nes_verbs.c
View File

@ -1315,6 +1315,8 @@ static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
nes_debug(NES_DBG_QP, "Invalid QP type: %d\n", init_attr->qp_type);
return ERR_PTR(-EINVAL);
}
init_completion(&nesqp->sq_drained);
init_completion(&nesqp->rq_drained);
nesqp->sig_all = (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR);
init_timer(&nesqp->terminate_timer);
@ -3452,6 +3454,29 @@ out:
return err;
}
/**
* nes_drain_sq - drain sq
* @ibqp: pointer to ibqp
*/
static void nes_drain_sq(struct ib_qp *ibqp)
{
struct nes_qp *nesqp = to_nesqp(ibqp);
if (nesqp->hwqp.sq_tail != nesqp->hwqp.sq_head)
wait_for_completion(&nesqp->sq_drained);
}
/**
* nes_drain_rq - drain rq
* @ibqp: pointer to ibqp
*/
static void nes_drain_rq(struct ib_qp *ibqp)
{
struct nes_qp *nesqp = to_nesqp(ibqp);
if (nesqp->hwqp.rq_tail != nesqp->hwqp.rq_head)
wait_for_completion(&nesqp->rq_drained);
}
/**
* nes_poll_cq
@ -3582,6 +3607,13 @@ static int nes_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry)
}
}
if (nesqp->iwarp_state > NES_CQP_QP_IWARP_STATE_RTS) {
if (nesqp->hwqp.sq_tail == nesqp->hwqp.sq_head)
complete(&nesqp->sq_drained);
if (nesqp->hwqp.rq_tail == nesqp->hwqp.rq_head)
complete(&nesqp->rq_drained);
}
entry->wr_id = wrid;
entry++;
cqe_count++;
@ -3754,6 +3786,8 @@ struct nes_ib_device *nes_init_ofa_device(struct net_device *netdev)
nesibdev->ibdev.req_notify_cq = nes_req_notify_cq;
nesibdev->ibdev.post_send = nes_post_send;
nesibdev->ibdev.post_recv = nes_post_recv;
nesibdev->ibdev.drain_sq = nes_drain_sq;
nesibdev->ibdev.drain_rq = nes_drain_rq;
nesibdev->ibdev.iwcm = kzalloc(sizeof(*nesibdev->ibdev.iwcm), GFP_KERNEL);
if (nesibdev->ibdev.iwcm == NULL) {

2
drivers/infiniband/hw/nes/nes_verbs.h
View File

@ -189,6 +189,8 @@ struct nes_qp {
u8 pau_pending;
u8 pau_state;
__u64 nesuqp_addr;
struct completion sq_drained;
struct completion rq_drained;
};
struct ib_mr *nes_reg_phys_mr(struct ib_pd *ib_pd,