linux-kernel - Re: [PATCH]: drm: radeon: Use surface for PCI GART table.

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Message-Id: <20090214.020431.193689843.davem@davemloft.net>
Date:	Sat, 14 Feb 2009 02:04:31 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	michel@...nzer.net
Cc:	benh@...nel.crashing.org, airlied@...ux.ie,
	dri-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]: drm: radeon: Use surface for PCI GART table.

From: Michel Dänzer <michel@...nzer.net>
Date: Sat, 14 Feb 2009 10:59:59 +0100

> On Sat, 2009-02-14 at 01:51 -0800, David Miller wrote:
> > This allocates a physical surface for the PCI GART table, this way no
> > matter what other surface configurations exist the GART table will
> > always be seen by the hardware properly.
> 
> BTW, I don't think the swapping settings affect GPU access to the table,
> only CPU access, but this is a good solution anyway.

They absolutely and positively do effect GPU access to the table.
I've proven it with many conclusive tests over the past 3 days.

> This is only really necessary on big endian, but other than that:
> 
> Acked-By: Michel Dänzer <daenzer@...are.com>

Thanks.
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