| Message ID | 1247187904-31999-6-git-send-email-fujita.tomonori@lab.ntt.co.jp (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 1c3f943..adac59c 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)
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> --- arch/x86/include/asm/dma-mapping.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)