RDMA/hns: The UD mode can only be configured with DCQCN

Luoyouming · rleon · commit 27c5fd271d8b · 2023-10-19T09:49:40.000+03:00
Due to hardware limitations, only DCQCN is supported for UD. Therefore, the default algorithm for UD is set to DCQCN. Fixes: f91696f ("RDMA/hns: Support congestion control type selection according to the FW") Signed-off-by: Luoyouming <luoyouming@huawei.com> Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com> Link: https://lore.kernel.org/r/20231017125239.164455-6-huangjunxian6@hisilicon.com Signed-off-by: Leon Romanovsky <leon@kernel.org>
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4730,6 +4730,9 @@ static int check_cong_type(struct ib_qp *ibqp,
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
 
+	if (ibqp->qp_type == IB_QPT_UD)
+		hr_dev->caps.cong_type = CONG_TYPE_DCQCN;
+
 	/* different congestion types match different configurations */
 	switch (hr_dev->caps.cong_type) {
 	case CONG_TYPE_DCQCN:

Original file line number	Diff line number	Diff line change
`@@ -4730,6 +4730,9 @@ static int check_cong_type(struct ib_qp *ibqp,`
`4730`	`4730`	`{`
`4731`	`4731`	`struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);`
`4732`	`4732`
	`4733`	`+ if (ibqp->qp_type == IB_QPT_UD)`
	`4734`	`+ hr_dev->caps.cong_type = CONG_TYPE_DCQCN;`
	`4735`	`+`
`4733`	`4736`	`/* different congestion types match different configurations */`
`4734`	`4737`	`switch (hr_dev->caps.cong_type) {`
`4735`	`4738`	`case CONG_TYPE_DCQCN:`