linux-kernel - Re: implement generic dma_map_ops for IOMMUs v6

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Message-ID: <60f73595-006d-8f88-f5af-d362f9e42ec1@arm.com>
Date:   Thu, 23 May 2019 13:33:00 +0100
From:   Robin Murphy <robin.murphy@....com>
To:     Christoph Hellwig <hch@....de>
Cc:     Tom Murphy <tmurphy@...sta.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        linux-kernel@...r.kernel.org, iommu@...ts.linux-foundation.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: implement generic dma_map_ops for IOMMUs v6

On 23/05/2019 08:00, Christoph Hellwig wrote:
> 
> Hi Robin and Joerg,
> 
> I think we are finally ready for the generic dma-iommu series.  I have
> various DMA API changes pending, and Tom has patches ready to convert
> the AMD and Intel iommu drivers over to it.  I'd love to have this
> in a stable branch shared between the dma-mapping and iommu trees
> the day after rc2 is released.  I volunteer to create the branch,
> but I'm fine with it living in the iommu tree as well.

Yup, I'd also like to see this in -next ASAP in the hope that board 
farms and maybe even real users can start chewing on it. Thanks for 
persevering :)

Robin.

> 
> 
> A git tree is also available at:
> 
>      git://git.infradead.org/users/hch/misc.git dma-iommu-ops.6
> 
> Gitweb:
> 
>      http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-iommu-ops.6
> 
> Changes since v5:
>   - rebased to latest linus tree and dropped a patch now merged
>   - remove the now pointless __dma_iommu_mmap function
>   - restore a cleanup from Robin that would have caused a conflict in
>     last merge winow, but is fine now
> 
> Changes since v4:
>   - rebased to 5.2-rc1
> 
> Changes since v3:
>   - fold the separate patch to refactor mmap bounds checking
>   - don't warn on not finding a vm_area
>   - improve a commit log
>   - refactor __dma_iommu_free a little differently
>   - remove a minor MSI map cleanup to avoid a conflict with the
>     "Split iommu_dma_map_msi_msg" series
> 
> Changes since v2:
>   - address various review comments and include patches from Robin
> 
> Changes since v1:
>   - only include other headers in dma-iommu.h if CONFIG_DMA_IOMMU is enabled
>   - keep using a scatterlist in iommu_dma_alloc
>   - split out mmap/sgtable fixes and move them early in the series
>   - updated a few commit logs
> _______________________________________________
> iommu mailing list
> iommu@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
> 

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