linux-kernel - Re: Question about iommu on x86

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Message-ID: <20110525125829.GC3467@dumpdata.com>
Date:	Wed, 25 May 2011 08:58:29 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Daniel Haid <d.haid@...i.tv>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Question about iommu on x86_64 and radeon driver.

On Tue, May 24, 2011 at 10:33:08PM +0100, Daniel Haid wrote:
> >Not bug per say. I've been working on making the TTM use the DMA API
> >so that those pages are allocated at startup and you don't end up
> >with having to sync the pages .. but I broke PowerPC and ARM
> >during 2.6.39
> >so I need to redo it.
> 
> If this is not a bug, shouldn't there be a message like
> "radeon currently does not work with SWIOTLB, disabling..."
> instead of
> "ring test failed, disabling..."?

Or perhaps just fix the driver? That is what I am working on - are you
interested in doing some beta-testing when they are ready?
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