diff options
author | Dmitry Baryshkov <dbaryshkov@gmail.com> | 2008-06-29 06:18:46 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2008-06-30 06:51:05 -0400 |
commit | ee7e5516be4f2107535ad5a3d47d9c79f93661a2 (patch) | |
tree | 57bdb330864036d6241deb8e69f351ee5ee01adb /include/asm-generic/dma-coherent.h | |
parent | 543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff) |
generic: per-device coherent dma allocator
Currently x86_32, sh and cris-v32 provide per-device coherent dma
memory allocator.
However their implementation is nearly identical. Refactor out
common code to be reused by them.
Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-generic/dma-coherent.h')
-rw-r--r-- | include/asm-generic/dma-coherent.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/asm-generic/dma-coherent.h b/include/asm-generic/dma-coherent.h new file mode 100644 index 000000000000..85a3ffaa0242 --- /dev/null +++ b/include/asm-generic/dma-coherent.h | |||
@@ -0,0 +1,32 @@ | |||
1 | #ifndef DMA_COHERENT_H | ||
2 | #define DMA_COHERENT_H | ||
3 | |||
4 | #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT | ||
5 | /* | ||
6 | * These two functions are only for dma allocator. | ||
7 | * Don't use them in device drivers. | ||
8 | */ | ||
9 | int dma_alloc_from_coherent(struct device *dev, ssize_t size, | ||
10 | dma_addr_t *dma_handle, void **ret); | ||
11 | int dma_release_from_coherent(struct device *dev, int order, void *vaddr); | ||
12 | |||
13 | /* | ||
14 | * Standard interface | ||
15 | */ | ||
16 | #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | ||
17 | extern int | ||
18 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | ||
19 | dma_addr_t device_addr, size_t size, int flags); | ||
20 | |||
21 | extern void | ||
22 | dma_release_declared_memory(struct device *dev); | ||
23 | |||
24 | extern void * | ||
25 | dma_mark_declared_memory_occupied(struct device *dev, | ||
26 | dma_addr_t device_addr, size_t size); | ||
27 | #else | ||
28 | #define dma_alloc_from_coherent(dev, size, handle, ret) (0) | ||
29 | #define dma_release_from_coherent(dev, order, vaddr) (0) | ||
30 | #endif | ||
31 | |||
32 | #endif | ||