From: robin.murphy@arm•com (Robin Murphy)
To: linux-arm-kernel@lists•infradead.org
Subject: [RFC PATCH] ARM64: PCI: inherit root controller's dma-coherent
Date: Wed, 10 Dec 2014 16:23:06 +0000 [thread overview]
Message-ID: <5488736A.9090600@arm.com> (raw)
In-Reply-To: <1664127.pT3ZlYms89@wuerfel>
Hi Arnd,
On 10/12/14 16:06, Arnd Bergmann wrote:
[...]
>> Arnd, given it isn't easy to figure out one good solution for moving
>> dma configuration into generic code(driver core, pci, .) now, could
>> the issue be fixed first?
>
> We have just merged a new arch_setup_dma_ops callback based on patches
> from Will Deacon, and this is required to get iommu drivers to work
> properly. The callback is used correctly by of_dma_configure, and we
> just need to hook it up on arm64 (I think Robin already has a patch,
> if Will doesn't) and call it from the PCI core. There really isn't
> any magic involved here.
>
Indeed, I have that as part of my arm64 IOMMU stuff, albeit with an
additional dependency on the new Xen is_device_dma_coherent. Once the
dust has settled on -rc1 I'll see what's in good enough shape to send out.
Robin.
prev parent reply other threads:[~2014-12-10 16:23 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-27 5:41 [RFC PATCH] ARM64: PCI: inherit root controller's dma-coherent Ming Lei
2014-11-27 7:39 ` Jon Masters
2014-11-27 9:05 ` Arnd Bergmann
2014-11-27 11:36 ` Catalin Marinas
2014-11-27 11:53 ` Arnd Bergmann
2014-11-27 9:03 ` Arnd Bergmann
2014-11-27 10:14 ` Ming Lei
2014-11-27 10:22 ` Will Deacon
2014-12-04 3:40 ` Ming Lei
2014-12-05 13:26 ` Grygorii Strashko
2014-12-05 16:05 ` Arnd Bergmann
2014-12-09 2:53 ` Ming Lei
2014-12-10 16:06 ` Arnd Bergmann
2014-12-10 16:23 ` Robin Murphy [this message]
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