[RFC 1/3 v3] mm: iommu: An API to unify IOMMU, CPU and device memory management

[FUJITA Tomonori]

On Tue, 20 Jul 2010 15:20:01 -0700
Zach Pfeffer <zpfeffer at codeaurora.org> wrote:

> > I'm not saying that it's reasonable to pass (or even allocate) a 1MB
> > buffer via the DMA API.
> 
> But given a bunch of large chunks of memory, is there any API that can
> manage them (asked this on the other thread as well)?

What is the problem about mapping a 1MB buffer with the DMA API?

Possibly, an IOMMU can't find space for 1MB but it's not the problem
of the DMA API.