Re: [patch 5/8] [Intel IOMMU] Graphics driver workarounds to provideunity map
From: Arjan van de Ven
Date: Tue Apr 10 2007 - 12:30:38 EST
David Miller wrote:
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 10 Apr 2007 09:33:51 +0100
On Mon, Apr 09, 2007 at 02:55:57PM -0700, Ashok Raj wrote:
Most GFX drivers don't call standard PCI DMA APIs to allocate DMA buffer,
Such drivers will be broken with IOMMU enabled. To workaround this issue,
we added two options.
All drm drivers do it. If the usual out of tree crap vendors are too
stupid for their own sake it's their fault.
So NACK to this patch.
That's my feeling as well, everything we care about should be using
the proper APIs or else what is the point of them...
that's too simple; X uses /dev/mem as well, even with something as
open as the Intel drivers.
Sad but true ;(
(it's getting resolved on the X side but existing X is like this)
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