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- #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 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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