From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 3 Feb 2010 10:18:39 +0900

Can we safely assume that the arch implementations already round
up/down to the safe boundary internally in this API (they should
already)?

I can only speak for sparc64 and x86 directly and those are fine.

Any such improper implementations would fail with many common
ethernet drivers already.

I don't like two DMA docs. I like to make pci_dma_* API obsolete. We
have the generic DMA API with generic devices so we are always able to
use the API (as you did with sbus_map_*). The majority arch
implementations safely call the bus specific DMA functions via the
generic DMA API. So there are not many things to do. We can just
convert pci_dma_* to dma_* API slowly.

Opinions?

I have no problem with this.