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Commit 99becaca authored by FUJITA Tomonori's avatar FUJITA Tomonori
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x86: add dma_capable() to replace is_buffer_dma_capable() 



dma_capable() eventually replaces is_buffer_dma_capable(), which tells
if a memory area is dma-capable or not. The problem of
is_buffer_dma_capable() is that it doesn't take a pointer to struct
device so it doesn't work for POWERPC.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
parent 02ca646e

arch/x86/include/asm/dma-mapping.h

+8 −0
Original line number Diff line number Diff line
@@ -55,6 +55,14 @@ extern int dma_set_mask(struct device *dev, u64 mask); 
extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,

					dma_addr_t *dma_addr, gfp_t flag);



static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)

{

	if (!dev->dma_mask)

		return 0;



	return addr + size <= *dev->dma_mask;

}



static inline void

dma_cache_sync(struct device *dev, void *vaddr, size_t size,

	enum dma_data_direction dir)