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SubjectRe: [PATCH v6 05/11] drivers: of: add automated assignment of reserved regions to client devices
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On Sun, 2014-03-02 at 13:40 +0800, Grant Likely wrote:
> On Fri, 28 Feb 2014 14:42:50 +0100, Marek Szyprowski <m.szyprowski@samsung.com> wrote:
> > This patch adds code for automated assignment of reserved memory regions
> > to struct device. reserved_mem->ops->device_init()/device_cleanup()
> > callbacks are called to perform reserved memory driver specific
> > initialization and cleanup
> >
> > Based on previous code provided by Josh Cartwright <joshc@codeaurora.org>
> >
> > Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
>
> Hi Marek,
>
> I've not applied this one yet, only because there is still the open
> issue of whether or not these functions should be called from drivers or
> from core code. I don't actually have any problems with the content of
> this patch. Once the user is sorted out I'll merge it.

Has anything more come of these patches? I see some of the series is now
in Linux 3.15, but the actual patches to let people use the feature
aren't there yet, namely patches 5 though 8.

My personal immediate interest in these is as a mechanism on arm64 to
limit CMA to a region of memory that is actually DMA-able devices (e.g.
below 4GB for 32-bit devices without an iommu).

For reference, the mail archives for this series is at
http://lkml.org/lkml/2014/2/28/237

--
Tixy



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