diff options
| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-10 03:04:57 +0200 |
|---|---|---|
| committer | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2009-07-28 07:19:19 +0200 |
| commit | 9a937c91eea31c4b594ea49a2a23c57003e04987 (patch) | |
| tree | b08728ff8ea09526207f7b1d118e971845650f84 | |
| parent | ia64: add dma_capable() to replace is_buffer_dma_capable() (diff) | |
| download | linux-9a937c91eea31c4b594ea49a2a23c57003e04987.tar.xz linux-9a937c91eea31c4b594ea49a2a23c57003e04987.zip | |
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>
| -rw-r--r-- | arch/powerpc/include/asm/dma-mapping.h | 13 |
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 |