RDMA/bnxt_re: Fix to remove workload check in SRQ limit path

[ Upstream commit 666bce0 ]

There should not be any checks of current workload to set
srq_limit value to SRQ hw context.

Remove all such workload checks and make a direct call to
set srq_limit via doorbell SRQ_ARM.

Fixes: 37cb11a ("RDMA/bnxt_re: Add SRQ support for Broadcom adapters")
Signed-off-by: Kashyap Desai <kashyap.desai@broadcom.com>
Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20250805101000.233310-3-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: kadesai16

drivers/infiniband/hw/bnxt_re/ib_verbs.c

@@ -1921,7 +1921,6 @@ int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
 	struct bnxt_re_srq *srq = container_of(ib_srq, struct bnxt_re_srq,
 					       ib_srq);
 	struct bnxt_re_dev *rdev = srq->rdev;
-	int rc;
 
 	switch (srq_attr_mask) {
 	case IB_SRQ_MAX_WR:
@@ -1933,11 +1932,8 @@ int bnxt_re_modify_srq(struct ib_srq *ib_srq, struct ib_srq_attr *srq_attr,
 			return -EINVAL;
 
 		srq->qplib_srq.threshold = srq_attr->srq_limit;
-		rc = bnxt_qplib_modify_srq(&rdev->qplib_res, &srq->qplib_srq);
-		if (rc) {
-			ibdev_err(&rdev->ibdev, "Modify HW SRQ failed!");
-			return rc;
-		}
+		bnxt_qplib_srq_arm_db(&srq->qplib_srq.dbinfo, srq->qplib_srq.threshold);
+
 		/* On success, update the shadow */
 		srq->srq_limit = srq_attr->srq_limit;
 		/* No need to Build and send response back to udata */

drivers/infiniband/hw/bnxt_re/qplib_fp.c

@@ -706,7 +706,6 @@ int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
 	srq->dbinfo.max_slot = 1;
 	srq->dbinfo.priv_db = res->dpi_tbl.priv_db;
 	bnxt_qplib_armen_db(&srq->dbinfo, DBC_DBC_TYPE_SRQ_ARMENA);
-	srq->arm_req = false;
 
 	return 0;
 fail:
@@ -716,24 +715,6 @@ int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
 	return rc;
 }
 
-int bnxt_qplib_modify_srq(struct bnxt_qplib_res *res,
-			  struct bnxt_qplib_srq *srq)
-{
-	struct bnxt_qplib_hwq *srq_hwq = &srq->hwq;
-	u32 count;
-
-	count = __bnxt_qplib_get_avail(srq_hwq);
-	if (count > srq->threshold) {
-		srq->arm_req = false;
-		bnxt_qplib_srq_arm_db(&srq->dbinfo, srq->threshold);
-	} else {
-		/* Deferred arming */
-		srq->arm_req = true;
-	}
-
-	return 0;
-}
-
 int bnxt_qplib_query_srq(struct bnxt_qplib_res *res,
 			 struct bnxt_qplib_srq *srq)
 {
@@ -775,7 +756,6 @@ int bnxt_qplib_post_srq_recv(struct bnxt_qplib_srq *srq,
 	struct bnxt_qplib_hwq *srq_hwq = &srq->hwq;
 	struct rq_wqe *srqe;
 	struct sq_sge *hw_sge;
-	u32 count = 0;
 	int i, next;
 
 	spin_lock(&srq_hwq->lock);
@@ -807,15 +787,8 @@ int bnxt_qplib_post_srq_recv(struct bnxt_qplib_srq *srq,
 
 	bnxt_qplib_hwq_incr_prod(&srq->dbinfo, srq_hwq, srq->dbinfo.max_slot);
 
-	spin_lock(&srq_hwq->lock);
-	count = __bnxt_qplib_get_avail(srq_hwq);
-	spin_unlock(&srq_hwq->lock);
 	/* Ring DB */
 	bnxt_qplib_ring_prod_db(&srq->dbinfo, DBC_DBC_TYPE_SRQ);
-	if (srq->arm_req == true && count > srq->threshold) {
-		srq->arm_req = false;
-		bnxt_qplib_srq_arm_db(&srq->dbinfo, srq->threshold);
-	}
 
 	return 0;
 }

drivers/infiniband/hw/bnxt_re/qplib_fp.h

@@ -543,8 +543,6 @@ int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq,
 			 srqn_handler_t srq_handler);
 int bnxt_qplib_create_srq(struct bnxt_qplib_res *res,
 			  struct bnxt_qplib_srq *srq);
-int bnxt_qplib_modify_srq(struct bnxt_qplib_res *res,
-			  struct bnxt_qplib_srq *srq);
 int bnxt_qplib_query_srq(struct bnxt_qplib_res *res,
 			 struct bnxt_qplib_srq *srq);
 void bnxt_qplib_destroy_srq(struct bnxt_qplib_res *res,