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RDMA/hns: Add constraint on the setting of local ACK timeout

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According to IB protocol, local ACK timeout shall be a 5 bit
value. Currently, hip08 could not support the possible max value 31. Fail
the request in this case.

Signed-off-by: Yixian Liu <liuyixian@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Lijun Ou 2018-12-12 17:49:08 +08:00 committed by Jason Gunthorpe
parent 4d103905eb
commit 44754b95dd
1 changed files with 10 additions and 4 deletions
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14
drivers/infiniband/hw/hns/hns_roce_hw_v2.c
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@ -3686,10 +3686,16 @@ static int modify_qp_rtr_to_rts(struct ib_qp *ibqp,
V2_QPC_BYTE_212_LSN_S, 0);
if (attr_mask & IB_QP_TIMEOUT) {
roce_set_field(context->byte_28_at_fl, V2_QPC_BYTE_28_AT_M,
V2_QPC_BYTE_28_AT_S, attr->timeout);
roce_set_field(qpc_mask->byte_28_at_fl, V2_QPC_BYTE_28_AT_M,
V2_QPC_BYTE_28_AT_S, 0);
if (attr->timeout < 31) {
roce_set_field(context->byte_28_at_fl,
V2_QPC_BYTE_28_AT_M, V2_QPC_BYTE_28_AT_S,
attr->timeout);
roce_set_field(qpc_mask->byte_28_at_fl,
V2_QPC_BYTE_28_AT_M, V2_QPC_BYTE_28_AT_S,
0);
} else {
dev_warn(dev, "Local ACK timeout shall be 0 to 30.\n");
}
}
roce_set_field(context->byte_172_sq_psn, V2_QPC_BYTE_172_SQ_CUR_PSN_M,