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Commit 499e4569 authored by Selvin Xavier's avatar Selvin Xavier Committed by Doug Ledford
Browse files

RDMA/bnxt_re: Report MISSED_EVENTS in req_notify_cq 



While invoking the req_notify_cq hook, ULPs can request
whether the CQs have any CQEs pending. If CQEs are pending,
drivers can indicate  it by returning 1 for req_notify_cq.
The stack will poll CQ again till CQ is empty.

This patch peeks the CQ for any valid entries and return accordingly.

Signed-off-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 10d1dedf

drivers/infiniband/hw/bnxt_re/ib_verbs.c

+5 −0
Original line number Diff line number Diff line
@@ -3027,6 +3027,11 @@ int bnxt_re_req_notify_cq(struct ib_cq *ib_cq, 
	else if (ib_cqn_flags & IB_CQ_SOLICITED)

		type = DBR_DBR_TYPE_CQ_ARMSE;



	/* Poll to see if there are missed events */

	if ((ib_cqn_flags & IB_CQ_REPORT_MISSED_EVENTS) &&

	    !(bnxt_qplib_is_cq_empty(&cq->qplib_cq)))

		return 1;



	bnxt_qplib_req_notify_cq(&cq->qplib_cq, type);



	return 0;

drivers/infiniband/hw/bnxt_re/qplib_fp.c

+19 −0
Original line number Diff line number Diff line
@@ -1895,6 +1895,25 @@ static int bnxt_qplib_cq_process_res_ud(struct bnxt_qplib_cq *cq, 
	return rc;

}



bool bnxt_qplib_is_cq_empty(struct bnxt_qplib_cq *cq)

{

	struct cq_base *hw_cqe, **hw_cqe_ptr;

	unsigned long flags;

	u32 sw_cons, raw_cons;

	bool rc = true;



	spin_lock_irqsave(&cq->hwq.lock, flags);

	raw_cons = cq->hwq.cons;

	sw_cons = HWQ_CMP(raw_cons, &cq->hwq);

	hw_cqe_ptr = (struct cq_base **)cq->hwq.pbl_ptr;

	hw_cqe = &hw_cqe_ptr[CQE_PG(sw_cons)][CQE_IDX(sw_cons)];



	 /* Check for Valid bit. If the CQE is valid, return false */

	rc = !CQE_CMP_VALID(hw_cqe, raw_cons, cq->hwq.max_elements);

	spin_unlock_irqrestore(&cq->hwq.lock, flags);

	return rc;

}



static int bnxt_qplib_cq_process_res_raweth_qp1(struct bnxt_qplib_cq *cq,

						struct cq_res_raweth_qp1 *hwcqe,

						struct bnxt_qplib_cqe **pcqe,

drivers/infiniband/hw/bnxt_re/qplib_fp.h

+1 −0
Original line number Diff line number Diff line
@@ -449,6 +449,7 @@ int bnxt_qplib_create_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq); 
int bnxt_qplib_destroy_cq(struct bnxt_qplib_res *res, struct bnxt_qplib_cq *cq);

int bnxt_qplib_poll_cq(struct bnxt_qplib_cq *cq, struct bnxt_qplib_cqe *cqe,

		       int num, struct bnxt_qplib_qp **qp);

bool bnxt_qplib_is_cq_empty(struct bnxt_qplib_cq *cq);

void bnxt_qplib_req_notify_cq(struct bnxt_qplib_cq *cq, u32 arm_type);

void bnxt_qplib_free_nq(struct bnxt_qplib_nq *nq);

int bnxt_qplib_alloc_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq);