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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 <oulijun@huawei.com>
Signed-off-by: Dongdong Huang(Donald) <hdd.huang@huawei.com>
Reviewed-by:  Wei Hu (Xavier) <xavier.huwei@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
hifive-unleashed-5.1
Lijun Ou 2016-09-20 17:07:05 +01:00 committed by Doug Ledford
parent 07182fa77b
commit c6c3bfea82
1 changed files with 13 additions and 4 deletions
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17
drivers/infiniband/hw/hns/hns_roce_hw_v1.c
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@ -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,