From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: CMA on AArch64
Date: Thu, 21 Nov 2013 12:06:00 +0000 [thread overview]
Message-ID: <20131121120559.GC22663@arm.com> (raw)
In-Reply-To: <528D2C7E.2010107@codeaurora.org>
Hi Laura,
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.
Yet another feature is DMA cache coherency management (primarily
streaming DMA) and I have a patch but I want this driven via DT rather
than drivers or SoC code calling set_dma_ops explicitly (the bindings
definition is work in progress).
Anyway, I think the CMA support wouldn't interfere much with the above
and could be merged. If you have time, please feel free to send some
patches ;).
--
Catalin
next prev parent reply other threads:[~2013-11-21 12:06 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 [this message]
2013-11-21 12:11 ` Russell King - ARM Linux
2013-11-21 12:37 ` Catalin Marinas
2014-02-26 9:50 ` [Linaro-mm-sig] " Hwang Chih-Chyuan
2014-02-26 12:08 ` Catalin Marinas
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