linux-kernel - Re: [PATCH] replace CONFIG_IOMMU with CONFIG_GART

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Date:	Sat, 19 Jul 2008 14:49:13 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] replace CONFIG_IOMMU with CONFIG_GART_IOMMU in iommu.h

On Sat, Jul 19, 2008 at 09:12:56PM +0900, FUJITA Tomonori wrote:
> 
> I think that we need a common header file (iommu.h or whatever) for
> what everyone needs, pci_iommu_shutdown(), no_iommu_init(), etc.
> 
> Anyway, I did more cleanups:
> 
> http://lkml.org/lkml/2008/7/10/510
> 
> or
> 
> tip/x86/gart
> 
> Let me know if you think we still need cleanups.

Now that you ask, I think the x86 DMA layer in general needs some rework
and cleanup. The implementation specific free_coherent function is never
called at the moment for example. For paravirtualized DMA we also need
some kind of stackable dma_ops according to Amit.

Joerg

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