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[for-next,1/3] RDMA/hns: Reduce PFC frames in congestion scenarios

Message ID 1585194018-4381-2-git-send-email-liweihang@huawei.com (mailing list archive)
State Mainlined
Commit 9d04d56c47b11962391b96202e181042941e30b3
Delegated to: Jason Gunthorpe
Headers show
Series RDMA/hns: Update some configurations related to hardware | expand

Commit Message

Weihang Li March 26, 2020, 3:40 a.m. UTC 
From: Jihua Tao <taojihua4@huawei.com>

The original value means sending 16 packets at a time, and it should be
configured to 0 which means sending 1 packet instead. It is modified to
reduce the number of PFC frames to make sure the performance meets
expectations when flow control is enabled on hip08.

Signed-off-by: Jihua Tao <taojihua4@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 9bd8fbf..943f88c 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4188,7 +4188,7 @@  static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 
 	/* mtu*(2^LP_PKTN_INI) should not bigger than 1 message length 64kb */
 	roce_set_field(context->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M,
-		       V2_QPC_BYTE_56_LP_PKTN_INI_S, 4);
+		       V2_QPC_BYTE_56_LP_PKTN_INI_S, 0);
 	roce_set_field(qpc_mask->byte_56_dqpn_err, V2_QPC_BYTE_56_LP_PKTN_INI_M,
 		       V2_QPC_BYTE_56_LP_PKTN_INI_S, 0);