[PATCH 7/8] common: dma-mapping: change alloc/free_coherent method to more generic alloc/free_attrs

[Marek Szyprowski]

Hello,

On Monday, June 27, 2011 3:22 PM Arnd Bergmann wrote:

> On Monday 27 June 2011, Marek Szyprowski wrote:
> > > On a related note, do you plan to make the CMA work use this
> > > transparently, or do you want to have a DMA_ATTR_LARGE or
> > > DMA_ATTR_CONTIGUOUS for CMA?
> >
> > IMHO it will be better to hide the CMA from the drivers. Memory allocated
> > from CMA doesn't really differ from the one allocated by
> dma_alloc_coherent()
> > (which internally use alloc_pages()), so I really see no reason for
> adding
> > additional attribute for it.
> 
> Ok, fair enough. On a semi-related topic, IIRC we still need to make sure
> that dma_alloc_coherent() pages are unmapped from the linear mapping. I
> hope
> this is independent of both CMA and this patch.

Right, that's one more big item that is still on the TODO list.

Best regards
-- 
Marek Szyprowski
Samsung Poland R&D Center