RDMA/bnxt_re: Avoid initializing the software queue for user queues

Software Queues to hold the WRs needs to be created
for only kernel queues. Avoid allocating the unnecessary
memory for user Queues.

Fixes: 1ac5a40 ("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Fixes: 159fb4c ("RDMA/bnxt_re: introduce a function to allocate swq")
Signed-off-by: Selvin Xavier <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Leon Romanovsky <[email protected]>

Author: selvintxavier

drivers/infiniband/hw/bnxt_re/qplib_fp.c

@@ -659,13 +659,6 @@ int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
 	rc = bnxt_qplib_alloc_init_hwq(&srq->hwq, &hwq_attr);
 	if (rc)
 		return rc;
-
-	srq->swq = kcalloc(srq->hwq.max_elements, sizeof(*srq->swq),
-			   GFP_KERNEL);
-	if (!srq->swq) {
-		rc = -ENOMEM;
-		goto fail;
-	}
 	srq->dbinfo.flags = 0;
 	bnxt_qplib_rcfw_cmd_prep((struct cmdq_base *)&req,
 				 CMDQ_BASE_OPCODE_CREATE_SRQ,
@@ -694,9 +687,17 @@ int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
 	spin_lock_init(&srq->lock);
 	srq->start_idx = 0;
 	srq->last_idx = srq->hwq.max_elements - 1;
-	for (idx = 0; idx < srq->hwq.max_elements; idx++)
-		srq->swq[idx].next_idx = idx + 1;
-	srq->swq[srq->last_idx].next_idx = -1;
+	if (!srq->hwq.is_user) {
+		srq->swq = kcalloc(srq->hwq.max_elements, sizeof(*srq->swq),
+				   GFP_KERNEL);
+		if (!srq->swq) {
+			rc = -ENOMEM;
+			goto fail;
+		}
+		for (idx = 0; idx < srq->hwq.max_elements; idx++)
+			srq->swq[idx].next_idx = idx + 1;
+		srq->swq[srq->last_idx].next_idx = -1;
+	}
 
 	srq->id = le32_to_cpu(resp.xid);
 	srq->dbinfo.hwq = &srq->hwq;
@@ -1042,13 +1043,14 @@ int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 	if (rc)
 		return rc;
 
-	rc = bnxt_qplib_alloc_init_swq(sq);
-	if (rc)
-		goto fail_sq;
-
-	if (psn_sz)
-		bnxt_qplib_init_psn_ptr(qp, psn_sz);
+	if (!sq->hwq.is_user) {
+		rc = bnxt_qplib_alloc_init_swq(sq);
+		if (rc)
+			goto fail_sq;
 
+		if (psn_sz)
+			bnxt_qplib_init_psn_ptr(qp, psn_sz);
+	}
 	req.sq_size = cpu_to_le32(bnxt_qplib_set_sq_size(sq, qp->wqe_mode));
 	pbl = &sq->hwq.pbl[PBL_LVL_0];
 	req.sq_pbl = cpu_to_le64(pbl->pg_map_arr[0]);
@@ -1074,9 +1076,11 @@ int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 		rc = bnxt_qplib_alloc_init_hwq(&rq->hwq, &hwq_attr);
 		if (rc)
 			goto sq_swq;
-		rc = bnxt_qplib_alloc_init_swq(rq);
-		if (rc)
-			goto fail_rq;
+		if (!rq->hwq.is_user) {
+			rc = bnxt_qplib_alloc_init_swq(rq);
+			if (rc)
+				goto fail_rq;
+		}
 
 		req.rq_size = cpu_to_le32(rq->max_wqe);
 		pbl = &rq->hwq.pbl[PBL_LVL_0];