From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: CMA on AArch64
Date: Thu, 21 Nov 2013 12:37:52 +0000 [thread overview]
Message-ID: <20131121123751.GD22663@arm.com> (raw)
In-Reply-To: <20131121121135.GW16735@n2100.arm.linux.org.uk>
On Thu, Nov 21, 2013 at 12:11:35PM +0000, Russell King - ARM Linux wrote:
> On Thu, Nov 21, 2013 at 12:06:00PM +0000, Catalin Marinas wrote:
> > On Wed, Nov 20, 2013 at 09:41:18PM +0000, Laura Abbott wrote:
> > > I noticed there is currently no CMA support for AArch64. Is this already
> > > on someone's TODO list or is this still open?
> >
> > It's more like a wish list but there were other things that took
> > priority. The arm64 DMA mapping code currently only supports swiotlb and
> > our next plan is for IOMMU mapping. But I would like parts of the DMA
> > IOMMU code under arch/arm to be made into a library (similar to the
> > lib/swiotlb.c) so that other architectures can easily make use of it.
>
> If you're referring to dmabounce.c, that's a 100% no-way-ever-even-if-
> hell-freezes-over NACK.
Does dmabounce.c implement IOMMU support? I'm talking about functions
like __alloc_iova, __iommu_create_mapping etc.
The generic swiotlb code has enough bouncing capabilities for my needs.
--
Catalin
next prev parent reply other threads:[~2013-11-21 12:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-20 21:41 CMA on AArch64 Laura Abbott
2013-11-21 12:06 ` Catalin Marinas
2013-11-21 12:11 ` Russell King - ARM Linux
2013-11-21 12:37 ` Catalin Marinas [this message]
2014-02-26 9:50 ` [Linaro-mm-sig] " Hwang Chih-Chyuan
2014-02-26 12:08 ` Catalin Marinas
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