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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/include/asm/dma-mapping.h
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#ifndef _ASM_DMA_MAPPING_H

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#define _ASM_DMA_MAPPING_H

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#include <asm/scatterlist.h>

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#include <asm/cache.h>

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#include <asm-generic/dma-coherent.h>

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#ifndef CONFIG_SGI_IP27	/* Kludge to fix 2.6.39 build for IP27 */

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#include <dma-coherence.h>

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#endif

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extern struct dma_map_ops *mips_dma_map_ops;

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static inline struct dma_map_ops *get_dma_ops(struct device *dev)

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{

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	if (dev && dev->archdata.dma_ops)

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		return dev->archdata.dma_ops;

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	else

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		return mips_dma_map_ops;

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}

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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)

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{

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	if (!dev->dma_mask)

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		return 0;

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	return addr + size <= *dev->dma_mask;

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}

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static inline void dma_mark_clean(void *addr, size_t size) {}

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#include <asm-generic/dma-mapping-common.h>

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static inline int dma_supported(struct device *dev, u64 mask)

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{

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	struct dma_map_ops *ops = get_dma_ops(dev);

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	return ops->dma_supported(dev, mask);

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}

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static inline int dma_mapping_error(struct device *dev, u64 mask)

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{

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	struct dma_map_ops *ops = get_dma_ops(dev);

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	return ops->mapping_error(dev, mask);

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}

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static inline int

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dma_set_mask(struct device *dev, u64 mask)

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{

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	if(!dev->dma_mask || !dma_supported(dev, mask))

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		return -EIO;

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	*dev->dma_mask = mask;

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	return 0;

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}

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

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	       enum dma_data_direction direction);

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static inline void *dma_alloc_coherent(struct device *dev, size_t size,

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				       dma_addr_t *dma_handle, gfp_t gfp)

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{

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	void *ret;

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	struct dma_map_ops *ops = get_dma_ops(dev);

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	ret = ops->alloc_coherent(dev, size, dma_handle, gfp);

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	debug_dma_alloc_coherent(dev, size, *dma_handle, ret);

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	return ret;

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}

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static inline void dma_free_coherent(struct device *dev, size_t size,

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				     void *vaddr, dma_addr_t dma_handle)

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{

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	struct dma_map_ops *ops = get_dma_ops(dev);

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	ops->free_coherent(dev, size, vaddr, dma_handle);

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	debug_dma_free_coherent(dev, size, vaddr, dma_handle);

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}

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void *dma_alloc_noncoherent(struct device *dev, size_t size,

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			   dma_addr_t *dma_handle, gfp_t flag);

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void dma_free_noncoherent(struct device *dev, size_t size,

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			 void *vaddr, dma_addr_t dma_handle);

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#endif /* _ASM_DMA_MAPPING_H */

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