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Commit 9a937c91 authored by FUJITA Tomonori's avatar FUJITA Tomonori
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powerpc: 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>
Acked-by: default avatarBecky Bruce <beckyb@kernel.crashing.org>
parent a0b00ca8

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

+13 −0
Original line number Diff line number Diff line
@@ -424,6 +424,19 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 
#endif

}



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

{

	struct dma_mapping_ops *ops = get_dma_ops(dev);



	if (ops->addr_needs_map && ops->addr_needs_map(dev, addr, size))

		return 0;



	if (!dev->dma_mask)

		return 0;



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

}



#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)

#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)

#ifdef CONFIG_NOT_COHERENT_CACHE