#ifndef _ASM_GENERIC_DMA_MAPPING_H
#define _ASM_GENERIC_DMA_MAPPING_H

/* define the dma api to allow compilation but not linking of
* dma dependent code. Code that depends on the dma-mapping
* API needs to set ‘depends on HAS_DMA’ in its Kconfig
*/

struct scatterlist;

extern void *
dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
gfp_t flag);

extern void
dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
dma_addr_t dma_handle);

#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)

extern dma_addr_t
dma_map_single(struct device *dev, void *ptr, size_t size,
enum dma_data_direction direction);

extern void
dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
enum dma_data_direction direction);

extern int
dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
enum dma_data_direction direction);

extern void
dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
enum dma_data_direction direction);

extern dma_addr_t
dma_map_page(struct device *dev, struct page *page, unsigned long offset,
size_t size, enum dma_data_direction direction);

extern void
dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
enum dma_data_direction direction);

extern void
dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction);

extern void
dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
unsigned long offset, size_t size,
enum dma_data_direction direction);

extern void
dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
enum dma_data_direction direction);

#define dma_sync_single_for_device dma_sync_single_for_cpu
#define dma_sync_single_range_for_device dma_sync_single_range_for_cpu
#define dma_sync_sg_for_device dma_sync_sg_for_cpu

extern int
dma_mapping_error(struct device *dev, dma_addr_t dma_addr);

extern int
dma_supported(struct device *dev, u64 mask);

extern int
dma_set_mask(struct device *dev, u64 mask);

extern int
dma_get_cache_alignment(void);

extern int
dma_is_consistent(struct device *dev, dma_addr_t dma_handle);

extern void
dma_cache_sync(struct device *dev, void *vaddr, size_t size,
enum dma_data_direction direction);

#endif /* _ASM_GENERIC_DMA_MAPPING_H */

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