[PATCH 5.14 075/432] RDMA/rtrs: Move sq_wr_avail to rtrs_con

Greg Kroah-Hartman
2021-09-16T17:16:53Z

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

[ Upstream commit cfcdbd9dd7632a9bb1e308a029f5fa65008333af ]

In order to account HB for sq_wr_avail properly, move sq_wr_avail from
rtrs_srv_con to rtrs_con.

Although rtrs-clt do not care sq_wr_avail, but still init it to
max_send_wr.

Fixes: b38041d50add ("RDMA/rtrs: Do not signal for heatbeat")
Link: https://lore.kernel.org/r/20210712060750.16494-7-jinpu.wang@ionos.com
Signed-off-by: Jack Wang <jinpu.wang@ionos.com>
Reviewed-by: Aleksei Marov <aleksei.marov@ionos.com>
Reviewed-by: Gioh Kim <gi-oh.kim@ionos.com>
Reviewed-by: Md Haris Iqbal <haris.iqbal@ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/infiniband/ulp/rtrs/rtrs-clt.c | 1 +
drivers/infiniband/ulp/rtrs/rtrs-pri.h | 1 +
drivers/infiniband/ulp/rtrs/rtrs-srv.c | 8 ++++----
drivers/infiniband/ulp/rtrs/rtrs-srv.h | 1 -
drivers/infiniband/ulp/rtrs/rtrs.c | 1 +
5 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-clt.c b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
index f023676e05e4..ece3205531b8 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-clt.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-clt.c
@@ -1680,6 +1680,7 @@ static int create_con_cq_qp(struct rtrs_clt_con *con)
sess->queue_depth * 3 + 1);
max_send_sge = 2;
}
+ atomic_set(&con->c.sq_wr_avail, max_send_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) {
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-pri.h b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
index b88a4944cb30..119aa3f7eafe 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-pri.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-pri.h
@@ -97,6 +97,7 @@ struct rtrs_con {
unsigned int cid;
int nr_cqe;
atomic_t wr_cnt;
+ atomic_t sq_wr_avail;
};

struct rtrs_sess {
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index 44ed15f38896..cd9a4ccf4c28 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -507,11 +507,11 @@ bool rtrs_srv_resp_rdma(struct rtrs_srv_op *id, int status)
ib_update_fast_reg_key(mr->mr, ib_inc_rkey(mr->mr->rkey));
}
if (unlikely(atomic_sub_return(1,
- &con->sq_wr_avail) < 0)) {
+ &con->c.sq_wr_avail) < 0)) {
rtrs_err(s, "IB send queue full: sess=%s cid=%d\n",
kobject_name(&sess->kobj),
con->c.cid);
- atomic_add(1, &con->sq_wr_avail);
+ atomic_add(1, &con->c.sq_wr_avail);
spin_lock(&con->rsp_wr_wait_lock);
list_add_tail(&id->wait_list, &con->rsp_wr_wait_list);
spin_unlock(&con->rsp_wr_wait_lock);
@@ -1268,7 +1268,7 @@ static void rtrs_srv_rdma_done(struct ib_cq *cq, struct ib_wc *wc)
* post_send() RDMA write completions of IO reqs (read/write)
* and hb.
*/
- atomic_add(s->signal_interval, &con->sq_wr_avail);
+ atomic_add(s->signal_interval, &con->c.sq_wr_avail);

if (unlikely(!list_empty_careful(&con->rsp_wr_wait_list)))
rtrs_rdma_process_wr_wait_list(con);
@@ -1680,7 +1680,7 @@ static int create_con(struct rtrs_srv_sess *sess,
*/
}
cq_num = max_send_wr + max_recv_wr;
- atomic_set(&con->sq_wr_avail, max_send_wr);
+ atomic_set(&con->c.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 */
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.h b/drivers/infiniband/ulp/rtrs/rtrs-srv.h
index 6785c3b6363e..e81774f5acd3 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.h
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.h
@@ -42,7 +42,6 @@ struct rtrs_srv_stats {

struct rtrs_srv_con {
struct rtrs_con c;
- atomic_t sq_wr_avail;
struct list_head rsp_wr_wait_list;
spinlock_t rsp_wr_wait_lock;
};
diff --git a/drivers/infiniband/ulp/rtrs/rtrs.c b/drivers/infiniband/ulp/rtrs/rtrs.c
index a8f8affc546a..0a4b4e1b5e5f 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs.c
@@ -190,6 +190,7 @@ int rtrs_post_rdma_write_imm_empty(struct rtrs_con *con, struct ib_cqe *cqe,
struct rtrs_sess *sess = con->sess;
enum ib_send_flags sflags;

+ atomic_dec_if_positive(&con->sq_wr_avail);
sflags = (atomic_inc_return(&con->wr_cnt) % sess->signal_interval) ?
0 : IB_SEND_SIGNALED;

--
2.30.2