On Thu, 4 Jul 2002, Benjamin Herrenschmidt wrote:
> >My tuning scheme satisfies your both demands, by ch->dma_base,
> >ch->autodma and ch->modes_map host informs generic code about its
> >capabilities.
>
> Just keep in mind that some chipsets don't use dma_base
> but still can do DMA (typically ide-pmac, and some embedded
> controllers). They do DMA their own way, not using the PRD
> tables. Actually, I would love beeing able to use that same
> dma_base (and others) fields for my own stuffs, but the common
> layer, last I looked at it, still does assumptions that when
> those are filled, they match a legacy controller.
>
> Ben.
Yep, I'm aware of them.
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