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Merge up to 2.6.4

#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H

#include <linux/device.h>
#include <asm/scatterlist.h>
#include <asm/cache.h>

void *dma_alloc_noncoherent(struct device *dev, size_t size,
			   dma_addr_t *dma_handle, int flag);

void dma_free_noncoherent(struct device *dev, size_t size,
			 void *vaddr, dma_addr_t dma_handle);

void *dma_alloc_coherent(struct device *dev, size_t size,
			   dma_addr_t *dma_handle, int flag);

void dma_free_coherent(struct device *dev, size_t size,
			 void *vaddr, dma_addr_t dma_handle);

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 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_unmap_sg(struct device *dev, struct scatterlist *sg,
	int nhwentries, enum dma_data_direction direction);
extern void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
	size_t size, enum dma_data_direction direction);
extern void dma_sync_single_range(struct device *dev, dma_addr_t dma_handle,
	unsigned long offset, size_t size, enum dma_data_direction direction);
extern void dma_sync_sg(struct device *dev, struct scatterlist *sg, int nelems,
	enum dma_data_direction direction);

extern int dma_supported(struct device *dev, u64 mask);

static inline int
dma_set_mask(struct device *dev, u64 mask)
{
	if(!dev->dma_mask || !dma_supported(dev, mask))
		return -EIO;

	*dev->dma_mask = mask;

	return 0;
}

static inline int
dma_get_cache_alignment(void)
{
	/* XXX Largest on any MIPS */
	return 128;
}

extern int dma_is_consistent(dma_addr_t dma_addr);

extern void dma_cache_sync(void *vaddr, size_t size,
	       enum dma_data_direction direction);

#endif /* _ASM_DMA_MAPPING_H */