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IB/rdmavt: Add post receive to rdmavt

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This patch adds the simple post receive verbs call to rdmavt. The actual
interrupt handling and packet processing is still done in the low level
driver.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Dennis Dalessandro 2016-01-22 13:00:48 -08:00 committed by Doug Ledford
parent 5a17ad11da
commit 120bdafaec
1 changed files with 40 additions and 7 deletions
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47
drivers/infiniband/sw/rdmavt/qp.c
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@ -1244,14 +1244,47 @@ int rvt_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
int rvt_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr,
struct ib_recv_wr **bad_wr)
{
/*
* When a packet arrives the driver needs to call up to rvt to process
* the packet. The UD, RC, UC processing will be done in rvt, however
* the driver should be able to override this if it so choses. Perhaps a
* set of function pointers set up at registration time.
*/
struct rvt_qp *qp = ibqp_to_rvtqp(ibqp);
struct rvt_rwq *wq = qp->r_rq.wq;
unsigned long flags;
return -EOPNOTSUPP;
/* Check that state is OK to post receive. */
if (!(ib_rvt_state_ops[qp->state] & RVT_POST_RECV_OK) || !wq) {
*bad_wr = wr;
return -EINVAL;
}
for (; wr; wr = wr->next) {
struct rvt_rwqe *wqe;
u32 next;
int i;
if ((unsigned)wr->num_sge > qp->r_rq.max_sge) {
*bad_wr = wr;
return -EINVAL;
}
spin_lock_irqsave(&qp->r_rq.lock, flags);
next = wq->head + 1;
if (next >= qp->r_rq.size)
next = 0;
if (next == wq->tail) {
spin_unlock_irqrestore(&qp->r_rq.lock, flags);
*bad_wr = wr;
return -ENOMEM;
}
wqe = rvt_get_rwqe_ptr(&qp->r_rq, wq->head);
wqe->wr_id = wr->wr_id;
wqe->num_sge = wr->num_sge;
for (i = 0; i < wr->num_sge; i++)
wqe->sg_list[i] = wr->sg_list[i];
/* Make sure queue entry is written before the head index. */
smp_wmb();
wq->head = next;
spin_unlock_irqrestore(&qp->r_rq.lock, flags);
}
return 0;
}
/**