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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/sh/include/asm/dma-mapping.h
15126 views
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#ifndef __ASM_SH_DMA_MAPPING_H

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#define __ASM_SH_DMA_MAPPING_H

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extern struct dma_map_ops *dma_ops;

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extern void no_iommu_init(void);

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

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{

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	return dma_ops;

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}

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

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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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	if (ops->dma_supported)

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		return ops->dma_supported(dev, mask);

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	return 1;

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}

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static inline int dma_set_mask(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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	if (!dev->dma_mask || !dma_supported(dev, mask))

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		return -EIO;

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	if (ops->set_dma_mask)

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		return ops->set_dma_mask(dev, mask);

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	*dev->dma_mask = mask;

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	return 0;

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}

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

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		    enum dma_data_direction dir);

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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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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)

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{

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	struct dma_map_ops *ops = get_dma_ops(dev);

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	if (ops->mapping_error)

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		return ops->mapping_error(dev, dma_addr);

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	return dma_addr == 0;

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}

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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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	struct dma_map_ops *ops = get_dma_ops(dev);

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	void *memory;

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	if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))

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		return memory;

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	if (!ops->alloc_coherent)

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		return NULL;

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

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

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	return memory;

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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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	if (dma_release_from_coherent(dev, get_order(size), vaddr))

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		return;

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	debug_dma_free_coherent(dev, size, vaddr, dma_handle);

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	if (ops->free_coherent)

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

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}

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/* arch/sh/mm/consistent.c */

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extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,

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					dma_addr_t *dma_addr, gfp_t flag);

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extern void dma_generic_free_coherent(struct device *dev, size_t size,

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				      void *vaddr, dma_addr_t dma_handle);

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#endif /* __ASM_SH_DMA_MAPPING_H */

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