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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-10 03:04:54 +0200 |
|---|---|---|
| committer | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-28 07:19:19 +0200 |
| commit | 99becaca86d184a4433e9fde879ff97303d7669f (patch) | |
| tree | 85714c5b4712cfce5025c500545b1735c4f0ce87 | |
| parent | swiotlb: remove unnecessary swiotlb_bus_to_virt (diff) | |
| download | linux-99becaca86d184a4433e9fde879ff97303d7669f.tar.xz linux-99becaca86d184a4433e9fde879ff97303d7669f.zip | |
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: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
| -rw-r--r-- | arch/x86/include/asm/dma-mapping.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 1c3f9435f1c9..adac59c8f69b 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -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) |