All of lore.kernel.org
 help / color / mirror / Atom feed
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.

      reply	other threads:[~2014-12-10 16:23 UTC|newest]

Thread overview: 15+ 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 10:14     ` 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]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=5488736A.9090600@arm.com \
    --to=robin.murphy@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.