Messages in this thread | | | From | Arnd Bergmann <> | Subject | Re: [RFC] ARM DMA mapping TODO, v1 | Date | Thu, 28 Apr 2011 14:15:51 +0200 |
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On Thursday 28 April 2011, Joerg Roedel wrote: > On Thu, Apr 21, 2011 at 09:29:16PM +0200, Arnd Bergmann wrote: > > 4. Implement an architecture independent version of dma_map_ops > > based on the iommu.h API. As Joerg mentioned, this has been > > missing for some time, and it would be better to do it once > > than for each IOMMU separately. This is probably a lot of work. > > Yes, thats missing for a long time. It will also need some changes to > the IOMMU-API but that should be doable. The best would be to extend the > IOMMU-API so that it also supports GART-like IOMMUs. This way every > dma_ops implementation on all the architectures providing such an IOMMU > could be covered with the architecture independent dma_ops > implementation. This would only leave the low-level hardware access in > the IOMMU drivers. > I think this also requires to change the current semantics of the > existing IOMMU-API implementations. I will prepare a write-up of my > ideas for discussion.
Ok, thanks!
Please include Marek in this, he said he has already started with an implementation. Any insight from you will certainly help.
Arnd
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