Commit c6c3bfea authored by Lijun Ou's avatar Lijun Ou Committed by Doug Ledford
Browse files

IB/hns: The Ack timeout need a lower limit value 



The Ack timeout of qpc need a lower limit value,otherwise
the read performance will be very lower.

Signed-off-by: default avatarLijun Ou <oulijun@huawei.com>
Signed-off-by: default avatarDongdong Huang(Donald) <hdd.huang@huawei.com>
Reviewed-by: default avatarWei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: default avatarSalil Mehta <salil.mehta@huawei.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 07182fa7

drivers/infiniband/hw/hns/hns_roce_hw_v1.c

+13 −4
Original line number Diff line number Diff line
@@ -2410,10 +2410,19 @@ static int hns_roce_v1_m_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr, 
			       QP_CONTEXT_QPC_BYTES_156_RETRY_COUNT_INIT_M,

			       QP_CONTEXT_QPC_BYTES_156_RETRY_COUNT_INIT_S,

			       attr->retry_cnt);

		if (attr->timeout < 0x12) {

			dev_info(dev, "ack timeout value(0x%x) must bigger than 0x12.\n",

				 attr->timeout);

			roce_set_field(context->qpc_bytes_156,

				       QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_M,

				       QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_S,

				       0x12);

		} else {

			roce_set_field(context->qpc_bytes_156,

				       QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_M,

				       QP_CONTEXT_QPC_BYTES_156_ACK_TIMEOUT_S,

				       attr->timeout);

		}

		roce_set_field(context->qpc_bytes_156,

			       QP_CONTEXT_QPC_BYTES_156_RNR_RETRY_COUNT_INIT_M,

			       QP_CONTEXT_QPC_BYTES_156_RNR_RETRY_COUNT_INIT_S,

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