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Date:   Tue, 22 Sep 2020 10:53:14 +0200
From:   Thomas Bogendoerfer <tsbogend@alpha.franken.de>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Mauro Carvalho Chehab <mchehab@kernel.org>,
        "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>,
        Joonyoung Shim <jy0922.shim@samsung.com>,
        Seung-Woo Kim <sw0312.kim@samsung.com>,
        Ben Skeggs <bskeggs@redhat.com>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Tomasz Figa <tfiga@chromium.org>,
        Matt Porter <mporter@kernel.crashing.org>,
        iommu@lists.linux-foundation.org,
        Stefan Richter <stefanr@s5r6.in-berlin.de>,
        linux1394-devel@lists.sourceforge.net, linux-doc@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-media@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org,
        linux-parisc@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
        nouveau@lists.freedesktop.org, netdev@vger.kernel.org,
        linux-scsi@vger.kernel.org, linux-mm@kvack.org,
        alsa-devel@alsa-project.org
Subject: Re: [PATCH 15/18] dma-mapping: add a new dma_alloc_pages API
Message-ID: <20200922085314.GI8477@alpha.franken.de>
References: <20200915155122.1768241-1-hch@lst.de>
 <20200915155122.1768241-16-hch@lst.de>
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On Tue, Sep 15, 2020 at 05:51:19PM +0200, Christoph Hellwig wrote:
> This API is the equivalent of alloc_pages, except that the returned memory
> is guaranteed to be DMA addressable by the passed in device.  The
> implementation will also be used to provide a more sensible replacement
> for DMA_ATTR_NON_CONSISTENT flag.
> 
> Additionally dma_alloc_noncoherent is switched over to use dma_alloc_pages
> as its backend.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  Documentation/core-api/dma-attributes.rst |  8 ---
>  arch/alpha/kernel/pci_iommu.c             |  2 +
>  arch/arm/mm/dma-mapping-nommu.c           |  2 +
>  arch/arm/mm/dma-mapping.c                 |  4 ++
>  arch/ia64/hp/common/sba_iommu.c           |  2 +
>  arch/mips/jazz/jazzdma.c                  |  7 +--
>  arch/powerpc/kernel/dma-iommu.c           |  2 +
>  arch/powerpc/platforms/ps3/system-bus.c   |  4 ++
>  arch/powerpc/platforms/pseries/vio.c      |  2 +
>  arch/s390/pci/pci_dma.c                   |  2 +
>  arch/x86/kernel/amd_gart_64.c             |  2 +
>  drivers/iommu/dma-iommu.c                 |  2 +
>  drivers/iommu/intel/iommu.c               |  4 ++
>  drivers/parisc/ccio-dma.c                 |  2 +
>  drivers/parisc/sba_iommu.c                |  2 +
>  drivers/xen/swiotlb-xen.c                 |  2 +
>  include/linux/dma-direct.h                |  5 ++
>  include/linux/dma-mapping.h               | 34 ++++++------
>  include/linux/dma-noncoherent.h           |  3 --
>  kernel/dma/direct.c                       | 52 ++++++++++++++++++-
>  kernel/dma/mapping.c                      | 63 +++++++++++++++++++++--
>  kernel/dma/ops_helpers.c                  | 35 +++++++++++++
>  kernel/dma/virt.c                         |  2 +
>  23 files changed, 206 insertions(+), 37 deletions(-)

Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> (MIPS part)

-- 
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea.                                                [ RFC1925, 2.3 ]