Messages in this thread | | | Date | Tue, 28 Sep 2010 09:13:35 +0200 | From | Per Förlin <> | Subject | Re: [PATCH RFCv2 1/2] dmaengine: add support for scatterlist to scatterlist transfers |
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> On Mon, Sep 27, 2010 at 05:23:34PM +0200, Linus Walleij wrote: >> 2010/9/25 Ira W. Snyder <iws@ovro.caltech.edu>: >> >>> This adds support for scatterlist to scatterlist DMA transfers. >> >> This is a good idea, we have a local function to do this in DMA40 already, >> stedma40_memcpy_sg(). >> > > I think that having two devices that want to implement this > functionality as part of the DMAEngine API is a good argument for making > it available as part of the core API. I think it would be good to add > this to struct dma_device, and add a capability (DMA_SG?) for it as > well. > > I have looked at the stedma40_memcpy_sg() function, and I think we would > want to extend it slightly for the generic API. Is there any good reason > to prohibit scatterlists with different numbers of elements? No
/Per
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