[ofa-general] Re: iWARP peer-to-peer CM proposal

[Steve Wise]

Caitlin Bestler wrote:
> On Nov 27, 2007 6:54 AM, Kanevsky, Arkady <Arkady.Kanevsky at netapp.com> wrote:
>> ULP can post recvs before connection is established but not to send
>> queue
>> prior to connection establishment.
>>
> 
> 
> ULP can post sends only after it is notified that the connection is established.
> 
> The issue is when the iWARP layer can issue this notification.
> 
> If the MPA layer implements fencing on its own, then the notification can
> be provided immediately after the MPA Request/Response exchange.
> 
> If not, it must wait for the first MPA frame. The problem is that
> implementations
> that adhere to closely to the RDMAC verbs can obtain no information about
> the connection unless there is a CQE producing event.

The idea for this "hack" is that the passive side (the side that sends 
the MPA response) will hold off posting the ESTABLISHED event to the 
rdma-cm ULP until after it receives this 0B Read Request from the client...