linux-kernel - Re: [PATCH 0/8] x86 dma_*_coherent rework patchset v2

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Date:	Wed, 20 Aug 2008 11:46:12 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Joerg Roedel <joerg.roedel@....com>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	mingo@...hat.com, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
	muli@...ibm.com
Subject: Re: [PATCH 0/8] x86 dma_*_coherent rework patchset v2


* Joerg Roedel <joerg.roedel@....com> wrote:

> Hi,
> 
> this patchset reworks the dma_*_coherent functions in the DMA layer 
> for the x86 architecture. The patch series extends the existing DMA 
> backends with missing *coherent callbacks and simplifies the generic 
> function to basically only call the registered backend. This allows 
> future optimizations in hardware specific IOMMU implementations. The 
> code ist tested on AMD64 with AMD IOMMU, GART, SWIOTLB and NOMMU as 
> well as on my old 486 box. Muli tested the Calgary specific patch.
> 
> Joerg
> 
> Changes since v1:
> 
> - fixed wrong logic in the pci-nommu alloc_coherent code
> - moved dma_*_coherent to include/asm-x86/dma-mapping.h
> 
> git diff --stat tip/master.. :
> 
>  arch/x86/kernel/amd_iommu.c      |    2 -
>  arch/x86/kernel/pci-calgary_64.c |   14 ++++
>  arch/x86/kernel/pci-dma.c        |  146 +-------------------------------------
>  arch/x86/kernel/pci-gart_64.c    |   35 +++++++++-
>  arch/x86/kernel/pci-nommu.c      |   62 ++++++++++++++++
>  include/asm-x86/dma-mapping.h    |   47 ++++++++++---
>  6 files changed, 149 insertions(+), 157 deletions(-)

applied to tip/x86/iommu - thanks Joerg!

Jesse, Fujita-san, do these changes look fine to you?

	Ingo
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