Hi, All
Who can help me for disscussing the loopback quesiton based on 10.2.2.3 with IB Specification Vol
Vol 1-Release-1.3-2015-03-03.pdf?
Thanks
在 2018/3/7 11:19, oulijun 写道:
> Hi, all
> I have been reviewing the Loopback Indicator definition and usecase with IB Specification Vol
> Vol 1-Release-1.3-2015-03-03.pdf and Annex A16:RDMA over ConvergedEthernet (RoCE).pdf
>
> The protocol specifies:
> o10-6.2-1.1: If the CI supports the Loopback Indicator, the CI shall report
> it through the Query HCA Verb. The CI shall accept the Loopback Indicator
> as an input modifier to the Create Address Handle, Modify Address
> Handle, Modify QP and Modify EEC verbs
>
> I have checked the create address handle verbs' input modifier.
> struct rdma_ah_attr {
> struct ib_global_route grh;
> u8 sl;
> u8 static_rate;
> u8 port_num;
> u8 ah_flags;
> enum rdma_ah_attr_type type;
> union {
> struct ib_ah_attr ib;
> struct roce_ah_attr roce;
> struct opa_ah_attr opa;
> };
> };
>
> and the verb for create ah in protocol specification.
> input modifiers:
> ...
> ...
> • Loopback Indicator (if the HCA supports Loopback Indicator
> on Address Handles). DLID and Loopback Indicator are mutually
> exclusive.
> ...
>
> I don't see why defined the loopback indicator and expose for app?
> I understand that the loopback indicator should be gived by ofed, the
> user can configue it. Any other understand?
>
> thanks
> Lijun ou
>
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