[RFC] ARM DMA mapping TODO, v1

[Russell King - ARM Linux]

On Thu, Apr 28, 2011 at 03:56:21PM +0200, Joerg Roedel wrote:
> There is no waste of code, just the opposite. Most of the dma_ops
> implementations that use an IOMMU today have a lot of similiarities in
> their code. All this code (on x86, alpha, sparc, ia64, ...) can
> be unified to a generic solution that fits all (by abstracting the
> differences between iommus into the iommu-api). So the current situation
> is a much bigger code waste than having this unified. The ARM platforms
> supporting iommu hardware will benefit from this as well. It simply
> doesn't make sense to have one dma_ops implementation for each iommu
> hardware around.

I'll defer until there's patches available then - I don't think there's
much value continuing to discuss this until that time.