Subject: Re: [PATCH 0 of 20] [RFC] ipath - PathScale InfiniPath driver
From: Arjan van de Ven <arjan@infradead.org>
To: "Bryan O'Sullivan" <bos@pathscale.com>
Cc: Greg KH <greg@kroah.com>, linux-kernel@vger.kernel.org,
       openib-general@openib.org
In-Reply-To: <1136321691.10862.61.camel@localhost.localdomain>
References: <patchbomb.1135816279@eng-12.pathscale.com>
	 <20051230080002.GA7438@kroah.com>
	 <1135984304.13318.50.camel@serpentine.pathscale.com>
	 <20051231001051.GB20314@kroah.com>
	 <1135993250.13318.94.camel@serpentine.pathscale.com>
	 <20060103172732.GA9170@kroah.com>
	 <1136321691.10862.61.camel@localhost.localdomain>
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Date: Tue, 03 Jan 2006 21:57:31 +0100
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On Tue, 2006-01-03 at 12:54 -0800, Bryan O'Sullivan wrote:
> On Tue, 2006-01-03 at 09:27 -0800, Greg KH wrote:
> 
> > Idealy, nothing should be new ioctls.  But in the end, it all depends on
> > exactly what you are trying to do with each different one.
> 
> Fair enough.
> 
> > I really don't know what the subnet management stuff involves, sorry.
> > But doesn't the open-ib layer handle that all for you already?
> 
> It does when our OpenIB driver is being used.  But our lower level
> driver is independent of OpenIB (and is often used without the
> infiniband stuff even configured into the kernel), and needs to provide
> some way for a userspace subnet management agent to send and receive
> packets.

that sounds like your driver should mimic the openIB userspace ABI for
this *exactly* so that you can use the same management tools for either
scenario...


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