Linux 3.12.5
[linux/fpc-iii.git] / include / asm-generic / dma-coherent.h
blob2be8a2dbc868f86f84e90c0e79a755c1f51e672b
1 #ifndef DMA_COHERENT_H
2 #define DMA_COHERENT_H
4 #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
5 /*
6 * These three 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);
13 int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
14 void *cpu_addr, size_t size, int *ret);
16 * Standard interface
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);
23 extern void
24 dma_release_declared_memory(struct device *dev);
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)
32 #define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0)
33 #endif
35 #endif