dma-coherent.h revision bca0fa5f12a6744a2b2e53154af65a51402b3426 
1#ifndef DMA_COHERENT_H
2#define DMA_COHERENT_H
3
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 */
9int dma_alloc_from_coherent(struct device *dev, ssize_t size,
10				       dma_addr_t *dma_handle, void **ret);
11int dma_release_from_coherent(struct device *dev, int order, void *vaddr);
12
13int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
14			    void *cpu_addr, size_t size, int *ret);
15/*
16 * Standard interface
17 */
18#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
19extern int
20dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
21			    dma_addr_t device_addr, size_t size, int flags);
22
23extern void
24dma_release_declared_memory(struct device *dev);
25
26extern void *
27dma_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#endif
33
34#endif
35