[ofa-general] [RFP] support for iWARP requirement - active connect side MUST send first FPDU

[Sean Hefty]

> That is what I've been trying to push.  Both MVAPICH2 and OMPI have been 
> open to adjusting their transports to adhere to this requirement.
> 
> I wouldn't mind implementing something to enforce this in the IWCM or 
> the iWARP drivers IF there was a clean way to do it.  So far there 
> hasn't been a clean way proposed.

Why can't either uDAPL or iW CM always do a send from the active to 
passive side that gets stripped off?  From the active side, the first 
send is always posted before any user sends, and if necessary, a user 
send can be queued by software to avoid a QP/CQ overrun.  The completion 
can simply be eaten by software.  On the passive side, you have a 
similar process for receiving the data.

(Yes this adds wire protocol, which requires both sides to support it.)

- Sean