Hi Joerg,
On 20/07/15 16:26, Joerg Roedel wrote:
On Thu, Jul 16, 2015 at 07:40:11PM +0100, Robin Murphy wrote:
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/dma-mapping.h | 15 +-
arch/arm64/mm/dma-mapping.c | 452 +++++++++++++++++++++++++++++
What happened to the plan to merge this with the existing iommu-based
dma-api implementation for 32 bit ARM?
The issue currently is that there are a bunch of drivers using the
exported arm_iommu_* functions directly. From what I can tell, they seem
like they could probably all be converted to using default domains
and/or the new domain type abstractions via the core IOMMU API, which
would then allow killing off dma_iommu_mapping and rewriting the
arch/arm implementation to use the new shared code. I don't currently
have any 32-bit platform to test with, so I'm a little dubious of taking
that all on myself right now.
In the meantime on arm64, DMA mapping ops are needed for SMMUv3 platform
device support, the Mediatek M4U patches and my own SMMUv2 work, so it
would be very useful to get the arm64 and common code in as a first
step, then look at cleaning up arch/arm for 4.4 without dangling
dependencies.
Robin.
Joerg
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