linux-kernel - Re: add a new dma_alloc_noncontiguous API v3

Open Source and information security mailing list archives

Message-ID: <20210311165250.GB25023@lst.de>
Date:   Thu, 11 Mar 2021 17:52:50 +0100
From:   Christoph Hellwig <hch@....de>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Ricardo Ribalda <ribalda@...omium.org>,
        Sergey Senozhatsky <senozhatsky@...gle.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        iommu@...ts.linux-foundation.org
Cc:     linux-media@...r.kernel.org, Robin Murphy <robin.murphy@....com>,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org
Subject: Re: add a new dma_alloc_noncontiguous API v3

Any comments?  Especially on the uvcvideo conversion?

On Mon, Mar 01, 2021 at 09:52:30AM +0100, Christoph Hellwig wrote:
> Hi all,
> 
> this series adds the new noncontiguous DMA allocation API requested by
> various media driver maintainers.
> 
> Changes since v2:
>  - rebased to Linux 5.12-rc1
>  - dropped one already merged patch
>  - pass an attrs argument to dma_alloc_noncontigous
>  - clarify the dma_vmap_noncontiguous documentation a bit
>  - fix double assignments in uvcvideo
> 
> Changes since v1:
>  - document that flush_kernel_vmap_range and invalidate_kernel_vmap_range
>    must be called once an allocation is mapped into KVA
>  - add dma-debug support
>  - remove the separate dma_handle argument, and instead create fully formed
>    DMA mapped scatterlists
>  - use a directional allocation in uvcvideo
>  - call invalidate_kernel_vmap_range from uvcvideo
> _______________________________________________
> iommu mailing list
> iommu@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/iommu
---end quoted text---

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