From: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Date: Tue, 19 May 2026 15:00:34 +0000 (+0530)
Subject: RDMA/bnxt_re: Update rq depth for app allocated QPs
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3d27ad0184c81048a226476834d2ce8225dd1f8;p=thirdparty%2Fkernel%2Flinux.git

RDMA/bnxt_re: Update rq depth for app allocated QPs

For app allocated QPs, there's no need to add extra slots or
to round up the slot count. Use 'max_recv_wr' count provided
by the application as is.

Link: https://patch.msgid.link/r/20260519150041.7251-3-sriharsha.basavapatna@broadcom.com
Signed-off-by: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index d50ec97518426..c3db53af3ff60 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -1475,7 +1475,8 @@ fail:
 
 static int bnxt_re_init_rq_attr(struct bnxt_re_qp *qp,
 				struct ib_qp_init_attr *init_attr,
-				struct bnxt_re_ucontext *uctx)
+				struct bnxt_re_ucontext *uctx,
+				bool fixed_que_attr)
 {
 	struct bnxt_qplib_dev_attr *dev_attr;
 	struct bnxt_qplib_qp *qplqp;
@@ -1500,12 +1501,16 @@ static int bnxt_re_init_rq_attr(struct bnxt_re_qp *qp,
 		init_attr->cap.max_recv_sge = rq->max_sge;
 		rq->wqe_size = bnxt_re_setup_rwqe_size(qplqp, rq->max_sge,
 						       dev_attr->max_qp_sges);
-		/* Allocate 1 more than what's provided so posting max doesn't
-		 * mean empty.
-		 */
-		rq->max_wqe = bnxt_re_init_depth(init_attr->cap.max_recv_wr + 1,
-						 dev_attr->max_qp_wqes + 1,
-						 uctx);
+		if (!fixed_que_attr) {
+			/* Allocate 1 more than what's provided so posting max doesn't
+			 * mean empty.
+			 */
+			rq->max_wqe = bnxt_re_init_depth(init_attr->cap.max_recv_wr + 1,
+							 dev_attr->max_qp_wqes + 1,
+							 uctx);
+		} else {
+			rq->max_wqe = init_attr->cap.max_recv_wr;
+		}
 		rq->max_sw_wqe = rq->max_wqe;
 		rq->q_full_delta = 0;
 		rq->sg_info.pgsize = PAGE_SIZE;
@@ -1676,6 +1681,7 @@ static int bnxt_re_init_qp_attr(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
 {
 	struct bnxt_qplib_dev_attr *dev_attr;
 	struct bnxt_qplib_qp *qplqp;
+	bool fixed_que_attr = false;
 	struct bnxt_re_dev *rdev;
 	struct bnxt_re_cq *cq;
 	int rc = 0, qptype;
@@ -1724,7 +1730,7 @@ static int bnxt_re_init_qp_attr(struct bnxt_re_qp *qp, struct bnxt_re_pd *pd,
 	}
 
 	/* Setup RQ/SRQ */
-	rc = bnxt_re_init_rq_attr(qp, init_attr, uctx);
+	rc = bnxt_re_init_rq_attr(qp, init_attr, uctx, fixed_que_attr);
 	if (rc)
 		return rc;
 	if (init_attr->qp_type == IB_QPT_GSI)