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#include 

#include 

#include 

#include 

extern void *

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

		   gfp_t flag); 

#define DMA_BIT_MASK(n)	(((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))

#define DMA_MASK_NONE	0x0ULL

static inline int valid_dma_direction(int dma_direction)

{

	return ((dma_direction == DMA_BIDIRECTIONAL) ||

		(dma_direction == DMA_TO_DEVICE) ||

		(dma_direction == DMA_FROM_DEVICE));

}

static inline int is_device_dma_capable(struct device *dev)

{

	return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;

}

#ifndef dma_max_pfn

static inline unsigned long dma_max_pfn(struct device *dev)

{

	return *dev->dma_mask >> PAGE_SHIFT;

}

#endif

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

					dma_addr_t *dma_handle, gfp_t flag)

{

	void *ret = dma_alloc_coherent(dev, size, dma_handle,

				       flag | __GFP_ZERO);