From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: DMA mapping API(IOMMU) for ARM64?
Date: Tue, 18 Jun 2013 12:32:44 +0200 [thread overview]
Message-ID: <5159282.rrJMaZuYMv@wuerfel> (raw)
In-Reply-To: <20130618101914.GB3539@mudshark.cambridge.arm.com>
On Tuesday 18 June 2013 11:19:14 Will Deacon wrote:
>
> I've spoken briefly with Catalin about this and it seems like there might be
> *some* scope for sharing common dma-mapping code between architectures.
> There doesn't really need to be any architecture-specific details in
> allocating iova space and the interface to the iommu drivers is
> well-defined. The arch-specific stuff is bogged down in the non-coherent
> buffer management, but that doesn't necessarily equate to lots of code.
>
> So, the best bet would be to figure out how to split up what we have under
> arch/arm/ so that it can be re-used by arm64 and potentially other
> architectures (powerpc has some simple stuff for coherent mappings and some
> less-simple stuff for non-coherent buffers).
I'm sure that other architectures are interested in sharing the code.
Best move it into the global mm/ directory, at least the version for
coherent mappings.
Arnd
next prev parent reply other threads:[~2013-06-18 10:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-18 2:39 DMA mapping API(IOMMU) for ARM64? Hiroshi Doyu
2013-06-18 10:19 ` Will Deacon
2013-06-18 10:32 ` Arnd Bergmann [this message]
2013-06-18 10:38 ` Catalin Marinas
2013-06-18 11:01 ` Hiroshi Doyu
2013-06-18 12:50 ` Catalin Marinas
2013-06-18 14:15 ` Arnd Bergmann
2013-06-18 15:20 ` Hiroshi Doyu
2013-06-18 22:08 ` Don Dutile
2013-06-19 11:11 ` Catalin Marinas
2013-06-19 9:29 ` Marek Szyprowski
2013-06-18 12:51 ` Arnd Bergmann
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