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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2017-07-20 11:19:58 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-07-20 16:09:10 +0200 |
| commit | 43fc509c3efb5c973991ee24c449ab2a0d71dd1e (patch) | |
| tree | 759d4b3a97ecb73339c560b2814699fbf8f4f93a /arch/arc/mm | |
| parent | 5771a8c08880cdca3bfb4a3fc6d309d6bba20877 (diff) | |
| download | linux-stable-43fc509c3efb5c973991ee24c449ab2a0d71dd1e.tar.gz linux-stable-43fc509c3efb5c973991ee24c449ab2a0d71dd1e.tar.bz2 linux-stable-43fc509c3efb5c973991ee24c449ab2a0d71dd1e.zip | |
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>
Diffstat (limited to 'arch/arc/mm')
| -rw-r--r-- | arch/arc/mm/dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arc/mm/dma.c b/arch/arc/mm/dma.c index 2a07e6ecafbd..71d3efff99d3 100644 --- a/arch/arc/mm/dma.c +++ b/arch/arc/mm/dma.c @@ -117,7 +117,7 @@ static int arc_dma_mmap(struct device *dev, struct vm_area_struct *vma, vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - if (dma_mmap_from_coherent(dev, vma, cpu_addr, size, &ret)) + if (dma_mmap_from_dev_coherent(dev, vma, cpu_addr, size, &ret)) return ret; if (off < count && user_count <= (count - off)) { |