linux-kernel - Re: [PATCH 0/4] add a helper function, is_buffer_dma

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Message-ID: <20080910093430.GB5259@elte.hu>
Date:	Wed, 10 Sep 2008 11:34:30 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Joerg Roedel <joerg.roedel@....com>
Cc:	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>, mingo@...hat.com,
	linux-kernel@...r.kernel.org, tony.luck@...el.com
Subject: Re: [PATCH 0/4] add a helper function, is_buffer_dma_capable()


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

> On Wed, Sep 10, 2008 at 01:06:45AM +0900, FUJITA Tomonori wrote:
> > This patchset adds a trivial helper function, is_buffer_dma_capable()
> > and cleans up some IOMMU implementations. This function is to to see
> > if a memory region is DMA-capable or not with the arguments, the
> > dma_mask (or coherent_dma_mask) of a device and the address and size
> > of a memory region. It's useful for IOMMUs that don't do virtual
> > mappings at all times.
> > 
> > The patch for swiotlb is a bug fix (the rest are just
> > cleanups). Currently, swiotlb doesn't take account of the size of a
> > memory region to see if if the memory region is DMA-capable.
> 
> Good idea. This patchset increases the readability of the software
> dma-api implementations.
> 
> Acked-by: Joerg Roedel <joerg.roedel@....com>

applied to tip/x86/iommu:

 2797982: swiotlb: convert swiotlb to use is_buffer_dma_capable helper function
 49fbf4e: x86: convert pci-nommu to use is_buffer_dma_capable helper function
 ac4ff65: x86: convert gart to use is_buffer_dma_capable helper function
 636dc67: add is_buffer_dma_capable helper function

thanks!

	Ingo
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