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    SubjectRe: DMA API issues


    On Mon, 21 Jun 2004, Linus Torvalds wrote:
    >
    > The argument at some point was that some architectures may not even _have_
    > a "struct page" for DMA memory, since it's not "normal" memory (ie "slow
    > memory" on m68k). However, I thought we all agreed that such a "struct
    > page" could be furnished if that architecture wants so support mmap'ing.

    .. which is not to say that we shouldn't have a "pci_mmap_pages()" thing
    _too_. Pretty clearly the easiest interface often is to just map the pages
    at mmap() time, and then we should just have a helper function to do that.

    I thought we did one already, but hey, maybe not.

    Linus
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