From c6c3bfea82be60c3d60144b980ea25f1252a6eb5 Mon Sep 17 00:00:00 2001 From: Lijun Ou Date: Tue, 20 Sep 2016 17:07:05 +0100 Subject: 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: Lijun Ou Signed-off-by: Dongdong Huang(Donald) Reviewed-by: Wei Hu (Xavier) Signed-off-by: Salil Mehta Signed-off-by: Doug Ledford --- drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'drivers/infiniband/hw/hns') diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c index 1205d1af4db0..5110a1864284 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c +++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c @@ -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); - 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); + 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, -- cgit v1.2.3