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authorMarek Szyprowski <m.szyprowski@samsung.com>2012-08-20 13:19:25 +0400
committerMarek Szyprowski <m.szyprowski@samsung.com>2012-08-28 23:01:02 +0400
commit6e5267aa543817015edb4a65c66e15f9809f92bd (patch)
tree9ec9d3d3003a0fc341856b81f0f2b30476daa51e /arch/arm/include
parente092705bcd53de3bafc3053b0b55bf83e5d6711f (diff)
downloadlinux-6e5267aa543817015edb4a65c66e15f9809f92bd.tar.xz
ARM: DMA-Mapping: add function for setting coherent pool size from platform code
Some platforms might require to increase atomic coherent pool to make sure that their device will be able to allocate all their buffers from atomic context. This function can be also used to decrease atomic coherent pool size if coherent allocations are not used for the given sub-platform. Suggested-by: Josh Coombs <josh.coombs@gmail.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Diffstat (limited to 'arch/arm/include')
-rw-r--r--arch/arm/include/asm/dma-mapping.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h
index 2ae842df4551..5c44dcb0987b 100644
--- a/arch/arm/include/asm/dma-mapping.h
+++ b/arch/arm/include/asm/dma-mapping.h
@@ -203,6 +203,13 @@ static inline void dma_free_writecombine(struct device *dev, size_t size,
}
/*
+ * This can be called during early boot to increase the size of the atomic
+ * coherent DMA pool above the default value of 256KiB. It must be called
+ * before postcore_initcall.
+ */
+extern void __init init_dma_coherent_pool_size(unsigned long size);
+
+/*
* This can be called during boot to increase the size of the consistent
* DMA region above it's default value of 2MB. It must be called before the
* memory allocator is initialised, i.e. before any core_initcall.