From: Sriharsha Basavapatna <sriharsha.basavapatna@broadcom.com>
Date: Tue, 19 May 2026 15:00:35 +0000 (+0530)
Subject: RDMA/bnxt_re: Update sq depth for app allocated QPs
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6e27c30bfdcd691afb0375e0e3e4b1f4d66e2c23;p=thirdparty%2Fkernel%2Flinux.git

RDMA/bnxt_re: Update sq depth for app allocated QPs

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

Link: https://patch.msgid.link/r/20260519150041.7251-4-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 c3db53af3ff60..e5a8d3972a420 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -1541,7 +1541,8 @@ 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 fixed_que_attr)
 {
 	struct bnxt_qplib_dev_attr *dev_attr;
 	struct bnxt_qplib_qp *qplqp;
@@ -1582,13 +1583,18 @@ 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 (!fixed_que_attr) {
+		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;
 
@@ -1737,7 +1743,7 @@ 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, fixed_que_attr);
 	if (rc)
 		return rc;
 	if (init_attr->qp_type == IB_QPT_GSI)