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authorFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-07-10 10:04:57 +0900
committerFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>2009-07-28 14:19:19 +0900
commit9a937c91eea31c4b594ea49a2a23c57003e04987 (patch)
treeb08728ff8ea09526207f7b1d118e971845650f84 /arch/powerpc/include/asm/dma-mapping.h
parenta0b00ca84b3ecb9eebd62ad34880d8cc0d988c8a (diff)
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>
Diffstat (limited to 'arch/powerpc/include/asm/dma-mapping.h')
-rw-r--r--arch/powerpc/include/asm/dma-mapping.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/dma-mapping.h b/arch/powerpc/include/asm/dma-mapping.h
index b44aaabdd1a6..6ff1f8581d79 100644
--- a/arch/powerpc/include/asm/dma-mapping.h
+++ b/arch/powerpc/include/asm/dma-mapping.h
@@ -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