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ARM: dma-mapping: remove custom consistent dma region

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This patch changes dma-mapping subsystem to use generic vmalloc areas
for all consistent dma allocations. This increases the total size limit
of the consistent allocations and removes platform hacks and a lot of
duplicated code.

Atomic allocations are served from special pool preallocated on boot,
because vmalloc areas cannot be reliably created in atomic context.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
This commit is contained in:
Marek Szyprowski
2012-07-30 09:11:33 +02:00
parent 5e6cafc83e
commit e9da6e9905
6 changed files with 188 additions and 330 deletions
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2
arch/arm/include/asm/dma-mapping.h
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@@ -226,7 +226,7 @@ static inline int dma_mmap_writecombine(struct device *dev, struct vm_area_struc
* 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.
*/
extern void __init init_consistent_dma_size(unsigned long size);
static inline void init_consistent_dma_size(unsigned long size) { }
/*
* For SA-1111, IXP425, and ADI systems the dma-mapping functions are "magic"