[PATCH 0/8] librdmacm: Support XRC QPs

[PATCH 0/8] librdmacm: Support XRC QPs

[Hefty, Sean]

Add the ability to establish communication using XRC QPs.  We
define a new port space specific for IB that will be used to
setup XRC connections.  (The new port space is not tied to any
specific QP type, so could also support UC in the future.)
Unlike the AF_IB patch set, the RDMA_PS_IB is usable with
sockaddr_sin and sockaddr_sin6 addresses.

XRC QPs are only usable through the newer librdmacm APIs:
rdma_create_ep and rdma_getaddrinfo.  Connection setup is
similar to other QPs, but additional steps are required
in order to obtain remote SRQ numbers.  Currently,
the sample apps make use of UD QP resolution for
this.  A request has been submitted to the IBTA to standardize
SRQN resolution, which is likely to result in changes in this
area.

Signed-off-by: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
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Re: [PATCH 0/8] librdmacm: Support XRC QPs

[Steve Wise]

Hey Sean,

Is XRC an IBTA standard?  Is the specification available on-line somewhere?

Steve.

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RE: [PATCH 0/8] librdmacm: Support XRC QPs

[Hefty, Sean]

> Is XRC an IBTA standard?  Is the specification available on-line
> somewhere?

Yes - XRC is provided as an Annex to the 1.2.1 spec.

I don't know if this is the released spec, but you can try this link:

http://members.infinibandta.org/kwspub/spec/XRC_Annex.pdf

- Sean
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