Commit a7d34a47 authored by Harish Chegondi's avatar Harish Chegondi Committed by Doug Ledford
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IB/qib: Remove qib_post_receive and use rdmavt version



This patch removes the simple post recv function in favor of using rdmavt.
The packet receive processing still lives in the driver though.

Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarHarish Chegondi <harish.chegondi@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent db3ef0eb
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+1 −63
Original line number Diff line number Diff line
@@ -300,68 +300,6 @@ static void qib_copy_from_sge(void *data, struct rvt_sge_state *ss, u32 length)
	}
}

/**

 * qib_post_receive - post a receive on a QP
 * @ibqp: the QP to post the receive on
 * @wr: the WR to post
 * @bad_wr: the first bad WR is put here
 *
 * This may be called from interrupt context.
 */
static int qib_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr,
			    struct ib_recv_wr **bad_wr)
{
	struct rvt_qp *qp = ibqp_to_rvtqp(ibqp);
	struct rvt_rwq *wq = qp->r_rq.wq;
	unsigned long flags;
	int ret;

	/* Check that state is OK to post receive. */
	if (!(ib_rvt_state_ops[qp->state] & RVT_POST_RECV_OK) || !wq) {
		*bad_wr = wr;
		ret = -EINVAL;
		goto bail;
	}

	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;
			ret = -EINVAL;
			goto bail;
		}

		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;
			ret = -ENOMEM;
			goto bail;
		}

		wqe = 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);
	}
	ret = 0;

bail:
	return ret;
}

/**
 * qib_qp_rcv - processing an incoming packet on a QP
 * @rcd: the context pointer
@@ -1826,7 +1764,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
	ibdev->query_qp = qib_query_qp;
	ibdev->destroy_qp = qib_destroy_qp;
	ibdev->post_send = NULL;
	ibdev->post_recv = qib_post_receive;
	ibdev->post_recv = NULL;
	ibdev->post_srq_recv = qib_post_srq_receive;
	ibdev->create_cq = NULL;
	ibdev->destroy_cq = NULL;