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Vladimir Murzin 43fc509c3e dma-coherent: introduce interface for default DMA pool

Christoph noticed [1] that default DMA pool in current form overload
the DMA coherent infrastructure. In reply, Robin suggested [2] to
split the per-device vs. global pool interfaces, so allocation/release
from default DMA pool is driven by dma ops implementation.

This patch implements Robin's idea and provide interface to
allocate/release/mmap the default (aka global) DMA pool.

To make it clear that existing *_from_coherent routines work on
per-device pool rename them to *_from_dev_coherent.

[1] https://lkml.org/lkml/2017/7/7/370
[2] https://lkml.org/lkml/2017/7/7/431

Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Suggested-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Andras Szemzo <sza@esh.hu>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

2017-07-20 16:09:10 +02:00

cache.c

ARCv2: mm: Merge 2 updates to DC_CTRL for region flush

2017-05-02 16:16:07 -07:00

dma.c

dma-coherent: introduce interface for default DMA pool

2017-07-20 16:09:10 +02:00

extable.c

ARC: uaccess: enable INLINE_COPY_{TO,FROM}_USER ...

2017-03-30 00:07:48 -04:00

fault.c

sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>