[PATCH for-next 0/4] misc update for RTRS

[PATCH for-next 0/4] misc update for RTRS

[Jack Wang]

Hi Jason, hi Doug,

Please consider to include following changes to the next merge window.
It contains:
- first 2 patches are for reducing the memory usage when create QP.
- the third one are to make testing on RXE working.
- last one is just cleanup for variables.

This patchset is based on rdma/for-next branch.

Guoqing Jiang (1):
  RDMA/rtrs: Rename some variables to avoid confusion

Jack Wang (2):
  RDMA/rtrs-srv: Set minimal max_send_wr and max_recv_wr
  RDMA/rtrs-clt: Use minimal max_send_sge when create qp

Md Haris Iqbal (1):
  RDMA/rtrs: RDMA_RXE requires more number of WR

 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 31 +++++++++++---------
 drivers/infiniband/ulp/rtrs/rtrs-clt.h |  3 +-
 drivers/infiniband/ulp/rtrs/rtrs-pri.h | 10 +++----
 drivers/infiniband/ulp/rtrs/rtrs-srv.c | 39 +++++++++++++++++---------
 drivers/infiniband/ulp/rtrs/rtrs.c     | 24 ++++++++--------
 5 files changed, 60 insertions(+), 47 deletions(-)

-- 
2.25.1

[PATCH for-next 1/4] RDMA/rtrs-srv: Set minimal max_send_wr and max_recv_wr

[Jack Wang]

From: Jack Wang <jinpu.wang@cloud.ionos.com>

Currently rtrs when create_qp use a coarse numbers (bigger in general),
which leads to hardware create more resources which only waste memory
with no benefits.

For max_send_wr, we don't really need alway max_qp_wr size when creating
qp, reduce it to cq_size.

For max_recv_wr,  cq_size is enough.

With the patch when sess_queue_depth=128, per session (2 paths)
memory consumption reduced from 188 MB to 65MB

When always_invalidate is enabled, we need send more wr,
so treat it special.

Fixes: 9cb837480424e ("RDMA/rtrs: server: main functionality")
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Gioh Kim <gi-oh.kim@ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-srv.c | 38 +++++++++++++++++---------
 1 file changed, 25 insertions(+), 13 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 5639b29b8b02..04ec3080e9b5 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1634,7 +1634,7 @@ static int create_con(struct rtrs_srv_sess *sess,
 	struct rtrs_sess *s = &sess->s;
 	struct rtrs_srv_con *con;
 
-	u32 cq_size, wr_queue_size;
+	u32 cq_size, max_send_wr, max_recv_wr, wr_limit;
 	int err, cq_vector;
 
 	con = kzalloc(sizeof(*con), GFP_KERNEL);
@@ -1655,30 +1655,42 @@ static int create_con(struct rtrs_srv_sess *sess,
 		 * All receive and all send (each requiring invalidate)
 		 * + 2 for drain and heartbeat
 		 */
-		wr_queue_size = SERVICE_CON_QUEUE_DEPTH * 3 + 2;
-		cq_size = wr_queue_size;
+		max_send_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
+		max_recv_wr = SERVICE_CON_QUEUE_DEPTH + 2;
+		cq_size = max_send_wr + max_recv_wr;
 	} else {
-		/*
-		 * If we have all receive requests posted and
-		 * all write requests posted and each read request
-		 * requires an invalidate request + drain
-		 * and qp gets into error state.
-		 */
-		cq_size = srv->queue_depth * 3 + 1;
 		/*
 		 * In theory we might have queue_depth * 32
 		 * outstanding requests if an unsafe global key is used
 		 * and we have queue_depth read requests each consisting
 		 * of 32 different addresses. div 3 for mlx5.
 		 */
-		wr_queue_size = sess->s.dev->ib_dev->attrs.max_qp_wr / 3;
+		wr_limit = sess->s.dev->ib_dev->attrs.max_qp_wr / 3;
+		/* when always_invlaidate enalbed, we need linv+rinv+mr+imm */
+		if (always_invalidate)
+			max_send_wr =
+				min_t(int, wr_limit,
+				      srv->queue_depth * (1 + 4) + 1);
+		else
+			max_send_wr =
+				min_t(int, wr_limit,
+				      srv->queue_depth * (1 + 2) + 1);
+
+		max_recv_wr = srv->queue_depth + 1;
+		/*
+		 * If we have all receive requests posted and
+		 * all write requests posted and each read request
+		 * requires an invalidate request + drain
+		 * and qp gets into error state.
+		 */
+		cq_size = max_send_wr + max_recv_wr;
 	}
-	atomic_set(&con->sq_wr_avail, wr_queue_size);
+	atomic_set(&con->sq_wr_avail, max_send_wr);
 	cq_vector = rtrs_srv_get_next_cq_vector(sess);
 
 	/* TODO: SOFTIRQ can be faster, but be careful with softirq context */
 	err = rtrs_cq_qp_create(&sess->s, &con->c, 1, cq_vector, cq_size,
-				 wr_queue_size, wr_queue_size,
+				 max_send_wr, max_recv_wr,
 				 IB_POLL_WORKQUEUE);
 	if (err) {
 		rtrs_err(s, "rtrs_cq_qp_create(), err: %d\n", err);
-- 
2.25.1

[PATCH for-next 2/4] RDMA/rtrs-clt: Use minimal max_send_sge when create qp

[Jack Wang]

From: Jack Wang <jinpu.wang@cloud.ionos.com>

We use device limit max_send_sge, which is suboptimal for memory usage.
We don't need that much for User Con, 1 is enough. And for IO con,
sess->max_segments + 1 is enough

Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 14 ++++++++------
 drivers/infiniband/ulp/rtrs/rtrs-clt.h |  1 -
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index f1fd7ae9ac53..cd53edddfe1f 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -1417,7 +1417,6 @@ static void query_fast_reg_mode(struct rtrs_clt_sess *sess)
 	sess->max_pages_per_mr =
 		min3(sess->max_pages_per_mr, (u32)max_pages_per_mr,
 		     ib_dev->attrs.max_fast_reg_page_list_len);
-	sess->max_send_sge = ib_dev->attrs.max_send_sge;
 }
 
 static bool rtrs_clt_change_state_get_old(struct rtrs_clt_sess *sess,
@@ -1573,7 +1572,7 @@ static void destroy_con(struct rtrs_clt_con *con)
 static int create_con_cq_qp(struct rtrs_clt_con *con)
 {
 	struct rtrs_clt_sess *sess = to_clt_sess(con->c.sess);
-	u32 max_send_wr, max_recv_wr, cq_size;
+	u32 max_send_wr, max_recv_wr, cq_size, max_send_sge;
 	int err, cq_vector;
 	struct rtrs_msg_rkey_rsp *rsp;
 
@@ -1587,6 +1586,7 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 		 */
 		max_send_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
 		max_recv_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
+		max_send_sge = 1;
 		/* We must be the first here */
 		if (WARN_ON(sess->s.dev))
 			return -EINVAL;
@@ -1625,25 +1625,27 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 		max_recv_wr =
 			min_t(int, sess->s.dev->ib_dev->attrs.max_qp_wr,
 			      sess->queue_depth * 3 + 1);
+		max_send_sge = sess->clt->max_segments + 1;
 	}
+	cq_size = max_send_wr + max_recv_wr;
 	/* alloc iu to recv new rkey reply when server reports flags set */
 	if (sess->flags & RTRS_MSG_NEW_RKEY_F || con->c.cid == 0) {
-		con->rsp_ius = rtrs_iu_alloc(max_recv_wr, sizeof(*rsp),
+		con->rsp_ius = rtrs_iu_alloc(cq_size, sizeof(*rsp),
 					      GFP_KERNEL, sess->s.dev->ib_dev,
 					      DMA_FROM_DEVICE,
 					      rtrs_clt_rdma_done);
 		if (!con->rsp_ius)
 			return -ENOMEM;
-		con->queue_size = max_recv_wr;
+		con->queue_size = cq_size;
 	}
 	cq_size = max_send_wr + max_recv_wr;
 	cq_vector = con->cpu % sess->s.dev->ib_dev->num_comp_vectors;
 	if (con->c.cid >= sess->s.irq_con_num)
-		err = rtrs_cq_qp_create(&sess->s, &con->c, sess->max_send_sge,
+		err = rtrs_cq_qp_create(&sess->s, &con->c, max_send_sge,
 					cq_vector, cq_size, max_send_wr,
 					max_recv_wr, IB_POLL_DIRECT);
 	else
-		err = rtrs_cq_qp_create(&sess->s, &con->c, sess->max_send_sge,
+		err = rtrs_cq_qp_create(&sess->s, &con->c, max_send_sge,
 					cq_vector, cq_size, max_send_wr,
 					max_recv_wr, IB_POLL_SOFTIRQ);
 	/*
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.h b/drivers/infiniband/ulp/rtrs/rtrs-clt.h
index 919c9f96f25b..822a820540d4 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.h
@@ -141,7 +141,6 @@ struct rtrs_clt_sess {
 	u32			chunk_size;
 	size_t			queue_depth;
 	u32			max_pages_per_mr;
-	int			max_send_sge;
 	u32			flags;
 	struct kobject		kobj;
 	u8			for_new_clt;
-- 
2.25.1

[PATCH for-next 3/4] RDMA/rtrs: RDMA_RXE requires more number of WR

[Jack Wang]

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

[PATCH for-next 4/4] RDMA/rtrs: Rename some variables to avoid confusion

[Jack Wang]

From: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>

Those variables are passed to create_cq, create_qp, rtrs_iu_alloc and
rtrs_iu_free, so these *_size means the num of unit. And cq_size also
means number of cq element.

Also move the setting of cq_num to common path.

Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Signed-off-by: Jack Wang <jinpu.wang@cloud.ionos.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-clt.c | 18 +++++++++---------
 drivers/infiniband/ulp/rtrs/rtrs-clt.h |  2 +-
 drivers/infiniband/ulp/rtrs/rtrs-pri.h | 10 +++++-----
 drivers/infiniband/ulp/rtrs/rtrs-srv.c |  7 +++----
 drivers/infiniband/ulp/rtrs/rtrs.c     | 24 ++++++++++++------------
 5 files changed, 30 insertions(+), 31 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index acf0fde410c3..67ff5bf9bfa8 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -1572,7 +1572,7 @@ static void destroy_con(struct rtrs_clt_con *con)
 static int create_con_cq_qp(struct rtrs_clt_con *con)
 {
 	struct rtrs_clt_sess *sess = to_clt_sess(con->c.sess);
-	u32 max_send_wr, max_recv_wr, cq_size, max_send_sge;
+	u32 max_send_wr, max_recv_wr, cq_num, max_send_sge;
 	int err, cq_vector;
 	struct rtrs_msg_rkey_rsp *rsp;
 
@@ -1628,26 +1628,26 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
 			      sess->queue_depth * 3 + 1);
 		max_send_sge = sess->clt->max_segments + 1;
 	}
-	cq_size = max_send_wr + max_recv_wr;
+	cq_num = max_send_wr + max_recv_wr;
 	/* alloc iu to recv new rkey reply when server reports flags set */
 	if (sess->flags & RTRS_MSG_NEW_RKEY_F || con->c.cid == 0) {
-		con->rsp_ius = rtrs_iu_alloc(cq_size, sizeof(*rsp),
+		con->rsp_ius = rtrs_iu_alloc(cq_num, sizeof(*rsp),
 					      GFP_KERNEL, sess->s.dev->ib_dev,
 					      DMA_FROM_DEVICE,
 					      rtrs_clt_rdma_done);
 		if (!con->rsp_ius)
 			return -ENOMEM;
-		con->queue_size = cq_size;
+		con->queue_num = cq_num;
 	}
-	cq_size = max_send_wr + max_recv_wr;
+	cq_num = max_send_wr + max_recv_wr;
 	cq_vector = con->cpu % sess->s.dev->ib_dev->num_comp_vectors;
 	if (con->c.cid >= sess->s.irq_con_num)
 		err = rtrs_cq_qp_create(&sess->s, &con->c, max_send_sge,
-					cq_vector, cq_size, max_send_wr,
+					cq_vector, cq_num, max_send_wr,
 					max_recv_wr, IB_POLL_DIRECT);
 	else
 		err = rtrs_cq_qp_create(&sess->s, &con->c, max_send_sge,
-					cq_vector, cq_size, max_send_wr,
+					cq_vector, cq_num, max_send_wr,
 					max_recv_wr, IB_POLL_SOFTIRQ);
 	/*
 	 * In case of error we do not bother to clean previous allocations,
@@ -1667,9 +1667,9 @@ static void destroy_con_cq_qp(struct rtrs_clt_con *con)
 	lockdep_assert_held(&con->con_mutex);
 	rtrs_cq_qp_destroy(&con->c);
 	if (con->rsp_ius) {
-		rtrs_iu_free(con->rsp_ius, sess->s.dev->ib_dev, con->queue_size);
+		rtrs_iu_free(con->rsp_ius, sess->s.dev->ib_dev, con->queue_num);
 		con->rsp_ius = NULL;
-		con->queue_size = 0;
+		con->queue_num = 0;
 	}
 	if (sess->s.dev_ref && !--sess->s.dev_ref) {
 		rtrs_ib_dev_put(sess->s.dev);
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.h b/drivers/infiniband/ulp/rtrs/rtrs-clt.h
index 822a820540d4..eed2a20ee9be 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.h
@@ -71,7 +71,7 @@ struct rtrs_clt_stats {
 struct rtrs_clt_con {
 	struct rtrs_con	c;
 	struct rtrs_iu		*rsp_ius;
-	u32			queue_size;
+	u32			queue_num;
 	unsigned int		cpu;
 	struct mutex		con_mutex;
 	atomic_t		io_cnt;
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-pri.h b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
index bd06a79fd516..76cca2058f6f 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-pri.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
@@ -95,7 +95,7 @@ struct rtrs_con {
 	struct ib_cq		*cq;
 	struct rdma_cm_id	*cm_id;
 	unsigned int		cid;
-	u16                     cq_size;
+	int                     nr_cqe;
 };
 
 struct rtrs_sess {
@@ -294,10 +294,10 @@ struct rtrs_msg_rdma_hdr {
 
 /* rtrs.c */
 
-struct rtrs_iu *rtrs_iu_alloc(u32 queue_size, size_t size, gfp_t t,
+struct rtrs_iu *rtrs_iu_alloc(u32 queue_num, size_t size, gfp_t t,
 			      struct ib_device *dev, enum dma_data_direction,
 			      void (*done)(struct ib_cq *cq, struct ib_wc *wc));
-void rtrs_iu_free(struct rtrs_iu *iu, struct ib_device *dev, u32 queue_size);
+void rtrs_iu_free(struct rtrs_iu *iu, struct ib_device *dev, u32 queue_num);
 int rtrs_iu_post_recv(struct rtrs_con *con, struct rtrs_iu *iu);
 int rtrs_iu_post_send(struct rtrs_con *con, struct rtrs_iu *iu, size_t size,
 		      struct ib_send_wr *head);
@@ -312,8 +312,8 @@ int rtrs_post_rdma_write_imm_empty(struct rtrs_con *con, struct ib_cqe *cqe,
 				   u32 imm_data, enum ib_send_flags flags,
 				   struct ib_send_wr *head);
 
-int rtrs_cq_qp_create(struct rtrs_sess *rtrs_sess, struct rtrs_con *con,
-		      u32 max_send_sge, int cq_vector, int cq_size,
+int rtrs_cq_qp_create(struct rtrs_sess *sess, struct rtrs_con *con,
+		      u32 max_send_sge, int cq_vector, int nr_cqe,
 		      u32 max_send_wr, u32 max_recv_wr,
 		      enum ib_poll_context poll_ctx);
 void rtrs_cq_qp_destroy(struct rtrs_con *con);
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index bb73f7762a87..c10dfc296259 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1634,7 +1634,7 @@ static int create_con(struct rtrs_srv_sess *sess,
 	struct rtrs_sess *s = &sess->s;
 	struct rtrs_srv_con *con;
 
-	u32 cq_size, max_send_wr, max_recv_wr, wr_limit;
+	u32 cq_num, max_send_wr, max_recv_wr, wr_limit;
 	int err, cq_vector;
 
 	con = kzalloc(sizeof(*con), GFP_KERNEL);
@@ -1657,7 +1657,6 @@ static int create_con(struct rtrs_srv_sess *sess,
 		 */
 		max_send_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
 		max_recv_wr = SERVICE_CON_QUEUE_DEPTH * 2 + 2;
-		cq_size = max_send_wr + max_recv_wr;
 	} else {
 		/*
 		 * In theory we might have queue_depth * 32
@@ -1683,13 +1682,13 @@ static int create_con(struct rtrs_srv_sess *sess,
 		 * requires an invalidate request + drain
 		 * and qp gets into error state.
 		 */
-		cq_size = max_send_wr + max_recv_wr;
 	}
+	cq_num = max_send_wr + max_recv_wr;
 	atomic_set(&con->sq_wr_avail, max_send_wr);
 	cq_vector = rtrs_srv_get_next_cq_vector(sess);
 
 	/* TODO: SOFTIRQ can be faster, but be careful with softirq context */
-	err = rtrs_cq_qp_create(&sess->s, &con->c, 1, cq_vector, cq_size,
+	err = rtrs_cq_qp_create(&sess->s, &con->c, 1, cq_vector, cq_num,
 				 max_send_wr, max_recv_wr,
 				 IB_POLL_WORKQUEUE);
 	if (err) {
diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
index 4e602e40f623..08e1f7d82c95 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs.c
@@ -18,7 +18,7 @@
 MODULE_DESCRIPTION("RDMA Transport Core");
 MODULE_LICENSE("GPL");
 
-struct rtrs_iu *rtrs_iu_alloc(u32 queue_size, size_t size, gfp_t gfp_mask,
+struct rtrs_iu *rtrs_iu_alloc(u32 iu_num, size_t size, gfp_t gfp_mask,
 			      struct ib_device *dma_dev,
 			      enum dma_data_direction dir,
 			      void (*done)(struct ib_cq *cq, struct ib_wc *wc))
@@ -26,10 +26,10 @@ struct rtrs_iu *rtrs_iu_alloc(u32 queue_size, size_t size, gfp_t gfp_mask,
 	struct rtrs_iu *ius, *iu;
 	int i;
 
-	ius = kcalloc(queue_size, sizeof(*ius), gfp_mask);
+	ius = kcalloc(iu_num, sizeof(*ius), gfp_mask);
 	if (!ius)
 		return NULL;
-	for (i = 0; i < queue_size; i++) {
+	for (i = 0; i < iu_num; i++) {
 		iu = &ius[i];
 		iu->direction = dir;
 		iu->buf = kzalloc(size, gfp_mask);
@@ -50,7 +50,7 @@ struct rtrs_iu *rtrs_iu_alloc(u32 queue_size, size_t size, gfp_t gfp_mask,
 }
 EXPORT_SYMBOL_GPL(rtrs_iu_alloc);
 
-void rtrs_iu_free(struct rtrs_iu *ius, struct ib_device *ibdev, u32 queue_size)
+void rtrs_iu_free(struct rtrs_iu *ius, struct ib_device *ibdev, u32 queue_num)
 {
 	struct rtrs_iu *iu;
 	int i;
@@ -58,7 +58,7 @@ void rtrs_iu_free(struct rtrs_iu *ius, struct ib_device *ibdev, u32 queue_size)
 	if (!ius)
 		return;
 
-	for (i = 0; i < queue_size; i++) {
+	for (i = 0; i < queue_num; i++) {
 		iu = &ius[i];
 		ib_dma_unmap_single(ibdev, iu->dma_addr, iu->size, iu->direction);
 		kfree(iu->buf);
@@ -212,20 +212,20 @@ static void qp_event_handler(struct ib_event *ev, void *ctx)
 	}
 }
 
-static int create_cq(struct rtrs_con *con, int cq_vector, u16 cq_size,
+static int create_cq(struct rtrs_con *con, int cq_vector, int nr_cqe,
 		     enum ib_poll_context poll_ctx)
 {
 	struct rdma_cm_id *cm_id = con->cm_id;
 	struct ib_cq *cq;
 
-	cq = ib_cq_pool_get(cm_id->device, cq_size, cq_vector, poll_ctx);
+	cq = ib_cq_pool_get(cm_id->device, nr_cqe, cq_vector, poll_ctx);
 	if (IS_ERR(cq)) {
 		rtrs_err(con->sess, "Creating completion queue failed, errno: %ld\n",
 			  PTR_ERR(cq));
 		return PTR_ERR(cq);
 	}
 	con->cq = cq;
-	con->cq_size = cq_size;
+	con->nr_cqe = nr_cqe;
 
 	return 0;
 }
@@ -260,20 +260,20 @@ static int create_qp(struct rtrs_con *con, struct ib_pd *pd,
 }
 
 int rtrs_cq_qp_create(struct rtrs_sess *sess, struct rtrs_con *con,
-		       u32 max_send_sge, int cq_vector, int cq_size,
+		       u32 max_send_sge, int cq_vector, int nr_cqe,
 		       u32 max_send_wr, u32 max_recv_wr,
 		       enum ib_poll_context poll_ctx)
 {
 	int err;
 
-	err = create_cq(con, cq_vector, cq_size, poll_ctx);
+	err = create_cq(con, cq_vector, nr_cqe, poll_ctx);
 	if (err)
 		return err;
 
 	err = create_qp(con, sess->dev->ib_pd, max_send_wr, max_recv_wr,
 			max_send_sge);
 	if (err) {
-		ib_cq_pool_put(con->cq, con->cq_size);
+		ib_cq_pool_put(con->cq, con->nr_cqe);
 		con->cq = NULL;
 		return err;
 	}
@@ -290,7 +290,7 @@ void rtrs_cq_qp_destroy(struct rtrs_con *con)
 		con->qp = NULL;
 	}
 	if (con->cq) {
-		ib_cq_pool_put(con->cq, con->cq_size);
+		ib_cq_pool_put(con->cq, con->nr_cqe);
 		con->cq = NULL;
 	}
 }
-- 
2.25.1

Re: [PATCH for-next 3/4] RDMA/rtrs: RDMA_RXE requires more number of WR

[Leon Romanovsky]

On Tue, Jun 08, 2021 at 12:30:38PM +0200, Jack Wang wrote:
> 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.

Why don't you query IB device to get max_qp_wr and set accordingly?

Thanks

> 
> 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
> 

Re: [PATCH for-next 3/4] RDMA/rtrs: RDMA_RXE requires more number of WR

[Jinpu Wang]

On Thu, Jun 10, 2021 at 9:23 AM Leon Romanovsky <leon@kernel.org> wrote:
>
> On Tue, Jun 08, 2021 at 12:30:38PM +0200, Jack Wang wrote:
> > 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.
>
> Why don't you query IB device to get max_qp_wr and set accordingly?
>
> Thanks
Hi Leon,

We don't want to set the max_qp_wr, it will consume lots of memory.
this patch is only for service connection
used control messages.

For IO connection, we do query and max_qp_wr of the device, but still
we need to set the minimum to
reduce the memory consumption.

Thanks! Regards
>
> >
> > 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
> >

Re: [PATCH for-next 3/4] RDMA/rtrs: RDMA_RXE requires more number of WR

[Leon Romanovsky]

On Thu, Jun 10, 2021 at 01:01:07PM +0200, Jinpu Wang wrote:
> On Thu, Jun 10, 2021 at 9:23 AM Leon Romanovsky <leon@kernel.org> wrote:
> >
> > On Tue, Jun 08, 2021 at 12:30:38PM +0200, Jack Wang wrote:
> > > 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.
> >
> > Why don't you query IB device to get max_qp_wr and set accordingly?
> >
> > Thanks
> Hi Leon,
> 
> We don't want to set the max_qp_wr, it will consume lots of memory.
> this patch is only for service connection
> used control messages.

OK, so why don't you set min(your_define, max_qp_wr)?

Thanks

> 
> For IO connection, we do query and max_qp_wr of the device, but still
> we need to set the minimum to
> reduce the memory consumption.
> 
> Thanks! Regards
> >
> > >
> > > 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
> > >

Re: [PATCH for-next 3/4] RDMA/rtrs: RDMA_RXE requires more number of WR

[Jinpu Wang]

On Thu, Jun 10, 2021 at 1:47 PM Leon Romanovsky <leon@kernel.org> wrote:
>
> On Thu, Jun 10, 2021 at 01:01:07PM +0200, Jinpu Wang wrote:
> > On Thu, Jun 10, 2021 at 9:23 AM Leon Romanovsky <leon@kernel.org> wrote:
> > >
> > > On Tue, Jun 08, 2021 at 12:30:38PM +0200, Jack Wang wrote:
> > > > 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.
> > >
> > > Why don't you query IB device to get max_qp_wr and set accordingly?
> > >
> > > Thanks
> > Hi Leon,
> >
> > We don't want to set the max_qp_wr, it will consume lots of memory.
> > this patch is only for service connection
> > used control messages.
>
> OK, so why don't you set min(your_define, max_qp_wr)?
>
> Thanks
Ok, will fix it.

Thx.
>
> >
> > For IO connection, we do query and max_qp_wr of the device, but still
> > we need to set the minimum to
> > reduce the memory consumption.
> >
> > Thanks! Regards
> > >
> > > >
> > > > 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
> > > >