Date: Fri, 3 Mar 2006 00:16:54 -0800
From: Chris Wedgwood <cw@f00f.org>
To: Andi Kleen <ak@suse.de>
Cc: Michael Monnerie <m.monnerie@zmi.at>, linux-kernel@vger.kernel.org,
       suse-linux-e@suse.com
Subject: Re: PCI-DMA: Out of IOMMU space on x86-64 (Athlon64x2), with solution
Message-ID: <20060303081654.GA11559@taniwha.stupidest.org>
References: <200603020023.21916@zmi.at> <200603020203.49128.ak@suse.de>
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On Thu, Mar 02, 2006 at 02:03:48AM +0100, Andi Kleen wrote:

> Nvidia hardware SATA cannot directly DMA to > 4GB, so it has to go
> through the IOMMU.

do you know if that is an actual hardware limitation or simply a
something we don't know how to do for lack of docs?

> And in that kernel the Nforce ethernet driver also didn't do >4GB
> access, although the ethernet HW is theoretically capable.

hrm, again, with a lack of docs is that likely to occur anytime soon?
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