linux-kernel - Re: consolidate swiotlb dma

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Message-ID: <5ef96935-f781-96e1-37cc-528d399f0150@gmail.com>
Date:   Wed, 10 Jan 2018 09:23:08 +0100
From:   Christian König <ckoenig.leichtzumerken@...il.com>
To:     Christoph Hellwig <hch@....de>, iommu@...ts.linux-foundation.org
Cc:     Konrad Rzeszutek Wilk <konrad@...nok.org>,
        Michal Simek <monstr@...str.eu>,
        Guan Xuetao <gxt@...c.pku.edu.cn>,
        linux-arm-kernel@...ts.infradead.org, linux-ia64@...r.kernel.org,
        linux-mips@...ux-mips.org, linuxppc-dev@...ts.ozlabs.org,
        x86@...nel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: consolidate swiotlb dma_map implementations

Acked-by: Christian König <christian.koenig@....com> for the whole series.

Regards,
Christian.

Am 10.01.2018 um 09:09 schrieb Christoph Hellwig:
> A lot of architectures have essentially identical dma_map_ops
> implementations to use swiotlb.  This series adds new generic
> swiotlb_alloc/free helpers that take the attrs argument exposed
> in dma_map_ops, and which do an enhanced direct allocation
> modelled after x86 and reused from the dma-direct code, and
> then switches most architectures over to it.  The only exceptions
> are mips, which requires additional cache flushing which will
> need a new abstraction, and x86 itself which will be handled in
> a later series with other x86 dma mapping changes.
>
> To support the generic code a few architectures that currently
> use ZONE_DMA/GFP_DMA for <= 32-bit allocations are switched to
> implement ZONE_DMA32 instead.
>
> This series is based on the previously sent series to consolidate
> the direct dma mapping implementation.  A git tree with this
> series as well as the prerequisites is available here:
>
>     git://git.infradead.org/users/hch/misc.git swiotlb
>
> Gitweb:
>
>     http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/swiotlb