[PATCH rdma-next v2 3/8] RDMA/bnxt_re: Update sq depth for app allocated QPs

[Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>]

For app allocated QPs, there's no need to reserve extra slots.
The application accounts for this while allocating the SQ.

Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 61879222248d..9a101f862c32 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -1542,7 +1542,8 @@ static void bnxt_re_adjust_gsi_rq_attr(struct bnxt_re_qp *qp)
 static int bnxt_re_init_sq_attr(struct bnxt_re_qp *qp,
 				struct ib_qp_init_attr *init_attr,
 				struct bnxt_re_ucontext *uctx,
-				struct bnxt_re_qp_req *ureq)
+				struct bnxt_re_qp_req *ureq,
+				bool app_qp)
 {
 	struct bnxt_qplib_dev_attr *dev_attr;
 	struct bnxt_qplib_qp *qplqp;
@@ -1583,13 +1584,18 @@ static int bnxt_re_init_sq_attr(struct bnxt_re_qp *qp,
 			sq->max_sw_wqe = sq->max_wqe;
 
 	}
-	sq->q_full_delta = diff + 1;
-	/*
-	 * Reserving one slot for Phantom WQE. Application can
-	 * post one extra entry in this case. But allowing this to avoid
-	 * unexpected Queue full condition
-	 */
-	qplqp->sq.q_full_delta -= 1;
+	if (!app_qp) {
+		sq->q_full_delta = diff + 1;
+		/*
+		 * Reserving one slot for Phantom WQE. Application can
+		 * post one extra entry in this case. But allowing this to avoid
+		 * unexpected Queue full condition
+		 */
+		qplqp->sq.q_full_delta -= 1;
+	} else {
+		sq->q_full_delta = 0;
+	}
+
 	qplqp->sq.sg_info.pgsize = PAGE_SIZE;
 	qplqp->sq.sg_info.pgshft = PAGE_SHIFT;
 
@@ -1738,7 +1744,7 @@ static int bnxt_re_init_qp_attr(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
 		bnxt_re_adjust_gsi_rq_attr(qp);
 
 	/* Setup SQ */
-	rc = bnxt_re_init_sq_attr(qp, init_attr, uctx, ureq);
+	rc = bnxt_re_init_sq_attr(qp, init_attr, uctx, ureq, app_qp);
 	if (rc)
 		return rc;
 	if (init_attr->qp_type == IB_QPT_GSI)
-- 
2.51.2.636.ga99f379adf