Re: DMA API issues

[James Bottomley]

On Fri, 2004-06-18 at 14:44, Ian Molton wrote:
> > For example, if usbaudio uses usb_buffer_alloc to stream data,
> > that eliminates dma bouncing.  That's dma_alloc_coherent at
> > its core ... it should allocate from that 32K region.
> 
> Agreed.

There are complications to this: not all platforms can access PCI memory
directly.  That's why ioremap and memcpy_toio and friends exist.  What
should happen on these platforms?

James


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