linux-kernel - Re: Question about iommu on x86

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Message-ID: <20110527155507.GB11273@dumpdata.com>
Date:	Fri, 27 May 2011 11:55:07 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Daniel Haid <d.haid@...i.tv>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: Question about iommu on x86_64 and radeon driver.

On Fri, May 27, 2011 at 04:48:39PM +0100, Daniel Haid wrote:
> I have looked again at the radeon driver and it seems that the
> drm drivers use vmalloc_32 to allocate their dma memory and
> that vmalloc_32 should allocate physical 32-bit addresses
> (in 2.6.39)?

The DRM code is not used anymore. It was used by XFree86 but nowadays
the TTM code is used instead.

> 
> So why does it still not work?

Ah, this would be a lengthy writeup.. so did you look at the
link I pointed you to?
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