Re: [PATCH] 2.5.24 IDE 97

[Benjamin Herrenschmidt]

>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.