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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: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Becky Bruce <beckyb@kernel.crashing.org>
This commit is contained in:
FUJITA Tomonori 2009-07-10 10:04:57 +09:00
parent a0b00ca84b
commit 9a937c91ee
1 changed files with 13 additions and 0 deletions
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13
arch/powerpc/include/asm/dma-mapping.h
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@ -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