[linux.git] / include / asm-generic / dma-coherent.h

#ifndef DMA_COHERENT_H
#define DMA_COHERENT_H

#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
/*
 * These two functions are only for dma allocator.
 * Don't use them in device drivers.
 */
int dma_alloc_from_coherent(struct device *dev, ssize_t size,
				       dma_addr_t *dma_handle, void **ret);
int dma_release_from_coherent(struct device *dev, int order, void *vaddr);

/*
 * Standard interface
 */
#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
extern int
dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
			    dma_addr_t device_addr, size_t size, int flags);

extern void
dma_release_declared_memory(struct device *dev);

extern void *
dma_mark_declared_memory_occupied(struct device *dev,
				  dma_addr_t device_addr, size_t size);
#else
#define dma_alloc_from_coherent(dev, size, handle, ret) (0)
#define dma_release_from_coherent(dev, order, vaddr) (0)
#endif

#endif
Commit	Line	Data
ee7e5516 DB	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