So all three current iWARP implementations can work with our proposed connection setup model. That's three different HW drivers.

Can we agree to begin with this approach and get all the other iwarp vs ib issues flushed out by getting at least one iwarp device working with the openib design? IE: I'm asking that we push in our connection setup patch in the iwarp branch, then work from that and continue this evolution.

Roland?  Whatchathink?


Stevo.




----- Original Message ----- From: "Bob Sharp" <[EMAIL PROTECTED]> To: "Caitlin Bestler" <[EMAIL PROTECTED]>; <[email protected]>
Sent: Thursday, August 25, 2005 8:43 PM
Subject: RE: [openib-general] [PATCH][iWARP] Added provider CM verbsandqueryprovider methods


From NetEffect's perspective, the per device approach is simple to
implement and I do not see it as an Ammasso specific approach. As Caitlin described, existing code needs to be reorganized but this aspect of our port
is not a major effort.

Bob

-----Original Message-----
From: [EMAIL PROTECTED] on behalf of Caitlin Bestler
Sent: Thu 8/25/2005 6:35 PM
To: [email protected]
Cc:
Subject: RE: [openib-general] [PATCH][iWARP] Added provider CM verbsandquery provider methods


-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Roland Dreier
Sent: Thursday, August 25, 2005 4:19 PM
To: Steve Wise
Cc: [email protected]
Subject: Re: [openib-general] [PATCH][iWARP] Added provider
CM verbs andquery provider methods

    Steve> Would you rather we put this in a CM device struct of some
    Steve> sort?  And have rnic devices export a CM device that has
    Steve> these sorts of methods?  To me that's basically the same as
    Steve> adding it to the struct ib_device.

I think if we really need these new methods, then they might
as well be in the rdma_device structure.

    Steve> Well, i haven't seen any other iwarp device at this detail
    Steve> (i only know of three iwarp devices in existance), so i
    Steve> cannot tell you.  Perhaps the other vendors can respond.

I think it's important for us to understand whether this is
an Amasso-specific interface or something that will work in
the general case.  Perhaps someone from Broadcom and/or
NetEffect (or some other
vendor) can comment?


The per-device connection methods proposed by Ammasso are definitely
implementable for every iWARP RNIC that I am aware of. It does move
some code around from where we have it currently, so we're not ready
to release our versions yet. But that's because things take time, not
because we think there's anything wrong with the interface.

This interface needs to be complemented by the existing IB-specific
interface and by an eventual TCP-specific interface that is compatible
with the DAT Socket Service Point and/or IT-API's socket convert options.
That interface would also deal with interoperability with pre-IETF MPA.
But only a handful of applications need those optinons, the DAT-style
interface accomodates the vast majority of applications that we are
aware of.



Caitlin Bestler
Principal Software Scientist
Broadcom
[EMAIL PROTECTED]



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