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ee7e5516 DB |
1 | #ifndef DMA_COHERENT_H |
2 | #define DMA_COHERENT_H | |
3 | ||
4 | #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT | |
5 | /* | |
bca0fa5f | 6 | * These three functions are only for dma allocator. |
ee7e5516 DB |
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 | ||
bca0fa5f MS |
13 | int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma, |
14 | void *cpu_addr, size_t size, int *ret); | |
ee7e5516 DB |
15 | /* |
16 | * Standard interface | |
17 | */ | |
18 | #define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY | |
19 | extern int | |
20 | dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr, | |
21 | dma_addr_t device_addr, size_t size, int flags); | |
22 | ||
23 | extern void | |
24 | dma_release_declared_memory(struct device *dev); | |
25 | ||
26 | extern void * | |
27 | dma_mark_declared_memory_occupied(struct device *dev, | |
28 | dma_addr_t device_addr, size_t size); | |
29 | #else | |
30 | #define dma_alloc_from_coherent(dev, size, handle, ret) (0) | |
31 | #define dma_release_from_coherent(dev, order, vaddr) (0) | |
64ccc9c0 | 32 | #define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0) |
ee7e5516 DB |
33 | #endif |
34 | ||
35 | #endif |