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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2017-07-20 12:19:58 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-07-20 16:09:10 +0200 |
| commit | 43fc509c3efb5c973991ee24c449ab2a0d71dd1e (patch) | |
| tree | 759d4b3a97ecb73339c560b2814699fbf8f4f93a /arch/arm64/mm/dma-mapping.c | |
| parent | Linux v4.13-rc1 (diff) | |
| download | linux-43fc509c3efb5c973991ee24c449ab2a0d71dd1e.tar.xz linux-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/arm64/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm64/mm/dma-mapping.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c index e90cd1db42a8..f27d4dd04384 100644 --- a/arch/arm64/mm/dma-mapping.c +++ b/arch/arm64/mm/dma-mapping.c @@ -329,7 +329,7 @@ static int __swiotlb_mmap(struct device *dev, vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot, is_device_dma_coherent(dev)); - 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; return __swiotlb_mmap_pfn(vma, pfn, size); @@ -706,7 +706,7 @@ static int __iommu_mmap_attrs(struct device *dev, struct vm_area_struct *vma, vma->vm_page_prot = __get_dma_pgprot(attrs, vma->vm_page_prot, is_device_dma_coherent(dev)); - 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 (attrs & DMA_ATTR_FORCE_CONTIGUOUS) { |