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
19int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
20				dma_addr_t device_addr, size_t size, int flags);
21
22void dma_release_declared_memory(struct device *dev);
23
24void *dma_mark_declared_memory_occupied(struct device *dev,
25					dma_addr_t device_addr, size_t size);
26#else
27#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
28#define dma_release_from_coherent(dev, order, vaddr) (0)
29#define dma_mmap_from_coherent(dev, vma, vaddr, order, ret) (0)
30#endif
31
32#endif
33