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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/include/asm-generic/dma-mapping-broken.h
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#ifndef _ASM_GENERIC_DMA_MAPPING_H

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#define _ASM_GENERIC_DMA_MAPPING_H

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/* define the dma api to allow compilation but not linking of

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 * dma dependent code.  Code that depends on the dma-mapping

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 * API needs to set 'depends on HAS_DMA' in its Kconfig

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 */

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struct scatterlist;

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extern void *

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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,

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		   gfp_t flag);

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extern void

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dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,

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		    dma_addr_t dma_handle);

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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)

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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)

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extern dma_addr_t

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dma_map_single(struct device *dev, void *ptr, size_t size,

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	       enum dma_data_direction direction);

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extern void

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dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,

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		 enum dma_data_direction direction);

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extern int

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dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,

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	   enum dma_data_direction direction);

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extern void

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dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,

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	     enum dma_data_direction direction);

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extern dma_addr_t

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dma_map_page(struct device *dev, struct page *page, unsigned long offset,

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	     size_t size, enum dma_data_direction direction);

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extern void

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dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,

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	       enum dma_data_direction direction);

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extern void

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dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,

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			enum dma_data_direction direction);

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extern void

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dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,

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			      unsigned long offset, size_t size,

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			      enum dma_data_direction direction);

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extern void

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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,

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		    enum dma_data_direction direction);

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#define dma_sync_single_for_device dma_sync_single_for_cpu

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#define dma_sync_single_range_for_device dma_sync_single_range_for_cpu

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#define dma_sync_sg_for_device dma_sync_sg_for_cpu

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extern int

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dma_mapping_error(struct device *dev, dma_addr_t dma_addr);

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extern int

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dma_supported(struct device *dev, u64 mask);

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extern int

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dma_set_mask(struct device *dev, u64 mask);

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extern int

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dma_get_cache_alignment(void);

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extern void

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dma_cache_sync(struct device *dev, void *vaddr, size_t size,

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	       enum dma_data_direction direction);

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#endif /* _ASM_GENERIC_DMA_MAPPING_H */

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