[PATCHv2 for-next 3/5] RDMA/rtrs: RDMA_RXE requires more number of WR

From: Jack Wang <jinpu.wang@ionos.com>
To: linux-rdma@vger.kernel.org
Cc: bvanassche@acm.org, leon@kernel.org, dledford@redhat.com,
	jgg@ziepe.ca, haris.iqbal@ionos.com, jinpu.wang@ionos.com,
	Md Haris Iqbal <haris.iqbal@cloud.ionos.com>,
	Jack Wang <jinpu.wang@cloud.ionos.com>,
	Gioh Kim <gi-oh.kim@ionos.com>
Subject: [PATCHv2 for-next 3/5] RDMA/rtrs: RDMA_RXE requires more number of WR
Date: Fri, 11 Jun 2021 14:10:32 +0200	[thread overview]
Message-ID: <20210611121034.48837-4-jinpu.wang@ionos.com> (raw)
In-Reply-To: <20210611121034.48837-1-jinpu.wang@ionos.com>

From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>

When using rdma_rxe, post_one_recv() returns
NOMEM error due to the full recv queue.
This patch increase the number of WR for receive queue
to support all devices.

Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 7 ++++---
 drivers/infiniband/ulp/rtrs/rtrs-srv.c | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index cd53edddfe1f..acf0fde410c3 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -1579,10 +1579,11 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 	lockdep_assert_held(&con->con_mutex);
 	if (con->c.cid == 0) {
 		/*
-		 * One completion for each receive and two for each send
-		 * (send request + registration)
+		 * Two (request + registration) completion for send
+		 * Two for recv if always_invalidate is set on server
+		 * or one for recv.
 		 * + 2 for drain and heartbeat
-		 * in case qp gets into error state
+		 * in case qp gets into error state.
 		 */
 		max_send_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
 		max_recv_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 04ec3080e9b5..bb73f7762a87 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1656,7 +1656,7 @@ static int create_con(struct rtrs_srv_sess *sess,
 		 * + 2 for drain and heartbeat
 		 */
 		max_send_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
-		max_recv_wr = SERVICE_CON_QUEUE_DEPTH + 2;
+		max_recv_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
 		cq_size = max_send_wr + max_recv_wr;
 	} else {
 		/*
-- 
2.25.1

