arch/powerpc/include/asm/dma-mapping.h - kernel/windcharger - Git at Google

 /*
  * Copyright (C) 2004 IBM
  *
  * Implements the generic device dma API for powerpc.
  * the pci and vio busses
  */
 #ifndef _ASM_DMA_MAPPING_H
 #define _ASM_DMA_MAPPING_H
 #ifdef __KERNEL__

 #include <linux/types.h>
 #include <linux/cache.h>
 /* need struct page definitions */
 #include <linux/mm.h>
 #include <linux/scatterlist.h>
 #include <linux/dma-attrs.h>
 #include <asm/io.h>
 #include <asm/swiotlb.h>

 #define DMA_ERROR_CODE		(~(dma_addr_t)0x0)

 /* Some dma direct funcs must be visible for use in other dma_ops */
 extern void *dma_direct_alloc_coherent(struct device *dev, size_t size,
 				       dma_addr_t *dma_handle, gfp_t flag);
 extern void dma_direct_free_coherent(struct device *dev, size_t size,
 				     void *vaddr, dma_addr_t dma_handle);

 extern unsigned long get_dma_direct_offset(struct device *dev);

 #ifdef CONFIG_NOT_COHERENT_CACHE
 /*
  * DMA-consistent mapping functions for PowerPCs that don't support
  * cache snooping.  These allocate/free a region of uncached mapped
  * memory space for use with DMA devices.  Alternatively, you could
  * allocate the space "normally" and use the cache management functions
  * to ensure it is consistent.
  */
 struct device;
 extern void *__dma_alloc_coherent(struct device *dev, size_t size,
 				  dma_addr_t *handle, gfp_t gfp);
 extern void __dma_free_coherent(size_t size, void *vaddr);
 extern void __dma_sync(void *vaddr, size_t size, int direction);
 extern void __dma_sync_page(struct page *page, unsigned long offset,
 				 size_t size, int direction);

 #else /* ! CONFIG_NOT_COHERENT_CACHE */
 /*
  * Cache coherent cores.
  */

 #define __dma_alloc_coherent(dev, gfp, size, handle)	NULL
 #define __dma_free_coherent(size, addr)		((void)0)
 #define __dma_sync(addr, size, rw)		((void)0)
 #define __dma_sync_page(pg, off, sz, rw)	((void)0)

 #endif /* ! CONFIG_NOT_COHERENT_CACHE */

 static inline unsigned long device_to_mask(struct device *dev)
 {
 	if (dev->dma_mask && *dev->dma_mask)
 		return *dev->dma_mask;
 	/* Assume devices without mask can take 32 bit addresses */
 	return 0xfffffffful;
 }

 /*
  * DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO
  */
 struct dma_mapping_ops {
 	void *		(*alloc_coherent)(struct device *dev, size_t size,
 				dma_addr_t *dma_handle, gfp_t flag);
 	void		(*free_coherent)(struct device *dev, size_t size,
 				void *vaddr, dma_addr_t dma_handle);
 	int		(*map_sg)(struct device *dev, struct scatterlist *sg,
 				int nents, enum dma_data_direction direction,
 				struct dma_attrs *attrs);
 	void		(*unmap_sg)(struct device *dev, struct scatterlist *sg,
 				int nents, enum dma_data_direction direction,
 				struct dma_attrs *attrs);
 	int		(*dma_supported)(struct device *dev, u64 mask);
 	int		(*set_dma_mask)(struct device *dev, u64 dma_mask);
 	dma_addr_t 	(*map_page)(struct device *dev, struct page *page,
 				unsigned long offset, size_t size,
 				enum dma_data_direction direction,
 				struct dma_attrs *attrs);
 	void		(*unmap_page)(struct device *dev,
 				dma_addr_t dma_address, size_t size,
 				enum dma_data_direction direction,
 				struct dma_attrs *attrs);
 	int		(*addr_needs_map)(struct device *dev, dma_addr_t addr,
 				size_t size);
 #ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS
 	void            (*sync_single_range_for_cpu)(struct device *hwdev,
 				dma_addr_t dma_handle, unsigned long offset,
 				size_t size,
 				enum dma_data_direction direction);
 	void            (*sync_single_range_for_device)(struct device *hwdev,
 				dma_addr_t dma_handle, unsigned long offset,
 				size_t size,
 				enum dma_data_direction direction);
 	void            (*sync_sg_for_cpu)(struct device *hwdev,
 				struct scatterlist *sg, int nelems,
 				enum dma_data_direction direction);
 	void            (*sync_sg_for_device)(struct device *hwdev,
 				struct scatterlist *sg, int nelems,
 				enum dma_data_direction direction);
 #endif
 };

 /*
  * Available generic sets of operations
  */
 #ifdef CONFIG_PPC64
 extern struct dma_mapping_ops dma_iommu_ops;
 #endif
 extern struct dma_mapping_ops dma_direct_ops;

 static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
 {
 	/* We don't handle the NULL dev case for ISA for now. We could
 	 * do it via an out of line call but it is not needed for now. The
 	 * only ISA DMA device we support is the floppy and we have a hack
 	 * in the floppy driver directly to get a device for us.
 	 */
 	if (unlikely(dev == NULL))
 		return NULL;

 	return dev->archdata.dma_ops;
 }

 static inline void set_dma_ops(struct device *dev, struct dma_mapping_ops *ops)
 {
 	dev->archdata.dma_ops = ops;
 }

 static inline int dma_supported(struct device *dev, u64 mask)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	if (unlikely(dma_ops == NULL))
 		return 0;
 	if (dma_ops->dma_supported == NULL)
 		return 1;
 	return dma_ops->dma_supported(dev, mask);
 }

 /* We have our own implementation of pci_set_dma_mask() */
 #define HAVE_ARCH_PCI_SET_DMA_MASK

 static inline int dma_set_mask(struct device *dev, u64 dma_mask)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	if (unlikely(dma_ops == NULL))
 		return -EIO;
 	if (dma_ops->set_dma_mask != NULL)
 		return dma_ops->set_dma_mask(dev, dma_mask);
 	if (!dev->dma_mask || !dma_supported(dev, dma_mask))
 		return -EIO;
 	*dev->dma_mask = dma_mask;
 	return 0;
 }

 /*
  * map_/unmap_single actually call through to map/unmap_page now that all the
  * dma_mapping_ops have been converted over. We just have to get the page and
  * offset to pass through to map_page
  */
 static inline dma_addr_t dma_map_single_attrs(struct device *dev,
 					      void *cpu_addr,
 					      size_t size,
 					      enum dma_data_direction direction,
 					      struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	return dma_ops->map_page(dev, virt_to_page(cpu_addr),
 				 (unsigned long)cpu_addr % PAGE_SIZE, size,
 				 direction, attrs);
 }

 static inline void dma_unmap_single_attrs(struct device *dev,
 					  dma_addr_t dma_addr,
 					  size_t size,
 					  enum dma_data_direction direction,
 					  struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	dma_ops->unmap_page(dev, dma_addr, size, direction, attrs);
 }

 static inline dma_addr_t dma_map_page_attrs(struct device *dev,
 					    struct page *page,
 					    unsigned long offset, size_t size,
 					    enum dma_data_direction direction,
 					    struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	return dma_ops->map_page(dev, page, offset, size, direction, attrs);
 }

 static inline void dma_unmap_page_attrs(struct device *dev,
 					dma_addr_t dma_address,
 					size_t size,
 					enum dma_data_direction direction,
 					struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	dma_ops->unmap_page(dev, dma_address, size, direction, attrs);
 }

 static inline int dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
 				   int nents, enum dma_data_direction direction,
 				   struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);
 	return dma_ops->map_sg(dev, sg, nents, direction, attrs);
 }

 static inline void dma_unmap_sg_attrs(struct device *dev,
 				      struct scatterlist *sg,
 				      int nhwentries,
 				      enum dma_data_direction direction,
 				      struct dma_attrs *attrs)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);
 	dma_ops->unmap_sg(dev, sg, nhwentries, direction, attrs);
 }

 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
 				       dma_addr_t *dma_handle, gfp_t flag)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);
 	return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
 }

 static inline void dma_free_coherent(struct device *dev, size_t size,
 				     void *cpu_addr, dma_addr_t dma_handle)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);
 	dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
 }

 static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
 					size_t size,
 					enum dma_data_direction direction)
 {
 	return dma_map_single_attrs(dev, cpu_addr, size, direction, NULL);
 }

 static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
 				    size_t size,
 				    enum dma_data_direction direction)
 {
 	dma_unmap_single_attrs(dev, dma_addr, size, direction, NULL);
 }

 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
 				      unsigned long offset, size_t size,
 				      enum dma_data_direction direction)
 {
 	return dma_map_page_attrs(dev, page, offset, size, direction, NULL);
 }

 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
 				  size_t size,
 				  enum dma_data_direction direction)
 {
 	dma_unmap_page_attrs(dev, dma_address, size, direction, NULL);
 }

 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
 			     int nents, enum dma_data_direction direction)
 {
 	return dma_map_sg_attrs(dev, sg, nents, direction, NULL);
 }

 static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
 				int nhwentries,
 				enum dma_data_direction direction)
 {
 	dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL);
 }

 #ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS
 static inline void dma_sync_single_for_cpu(struct device *dev,
 		dma_addr_t dma_handle, size_t size,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_single_range_for_cpu)
 		dma_ops->sync_single_range_for_cpu(dev, dma_handle, 0,
 					   size, direction);
 }

 static inline void dma_sync_single_for_device(struct device *dev,
 		dma_addr_t dma_handle, size_t size,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_single_range_for_device)
 		dma_ops->sync_single_range_for_device(dev, dma_handle,
 					      0, size, direction);
 }

 static inline void dma_sync_sg_for_cpu(struct device *dev,
 		struct scatterlist *sgl, int nents,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_sg_for_cpu)
 		dma_ops->sync_sg_for_cpu(dev, sgl, nents, direction);
 }

 static inline void dma_sync_sg_for_device(struct device *dev,
 		struct scatterlist *sgl, int nents,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_sg_for_device)
 		dma_ops->sync_sg_for_device(dev, sgl, nents, direction);
 }

 static inline void dma_sync_single_range_for_cpu(struct device *dev,
 		dma_addr_t dma_handle, unsigned long offset, size_t size,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_single_range_for_cpu)
 		dma_ops->sync_single_range_for_cpu(dev, dma_handle,
 					   offset, size, direction);
 }

 static inline void dma_sync_single_range_for_device(struct device *dev,
 		dma_addr_t dma_handle, unsigned long offset, size_t size,
 		enum dma_data_direction direction)
 {
 	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

 	BUG_ON(!dma_ops);

 	if (dma_ops->sync_single_range_for_device)
 		dma_ops->sync_single_range_for_device(dev, dma_handle, offset,
 					      size, direction);
 }
 #else /* CONFIG_PPC_NEED_DMA_SYNC_OPS */
 static inline void dma_sync_single_for_cpu(struct device *dev,
 		dma_addr_t dma_handle, size_t size,
 		enum dma_data_direction direction)
 {
 }

 static inline void dma_sync_single_for_device(struct device *dev,
 		dma_addr_t dma_handle, size_t size,
 		enum dma_data_direction direction)
 {
 }

 static inline void dma_sync_sg_for_cpu(struct device *dev,
 		struct scatterlist *sgl, int nents,
 		enum dma_data_direction direction)
 {
 }

 static inline void dma_sync_sg_for_device(struct device *dev,
 		struct scatterlist *sgl, int nents,
 		enum dma_data_direction direction)
 {
 }

 static inline void dma_sync_single_range_for_cpu(struct device *dev,
 		dma_addr_t dma_handle, unsigned long offset, size_t size,
 		enum dma_data_direction direction)
 {
 }

 static inline void dma_sync_single_range_for_device(struct device *dev,
 		dma_addr_t dma_handle, unsigned long offset, size_t size,
 		enum dma_data_direction direction)
 {
 }
 #endif

 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
 #ifdef CONFIG_PPC64
 	return (dma_addr == DMA_ERROR_CODE);
 #else
 	return 0;
 #endif
 }

 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
 #ifdef CONFIG_NOT_COHERENT_CACHE
 #define dma_is_consistent(d, h)	(0)
 #else
 #define dma_is_consistent(d, h)	(1)
 #endif

 static inline int dma_get_cache_alignment(void)
 {
 #ifdef CONFIG_PPC64
 	/* no easy way to get cache size on all processors, so return
 	 * the maximum possible, to be safe */
 	return (1 << INTERNODE_CACHE_SHIFT);
 #else
 	/*
 	 * Each processor family will define its own L1_CACHE_SHIFT,
 	 * L1_CACHE_BYTES wraps to this, so this is always safe.
 	 */
 	return L1_CACHE_BYTES;
 #endif
 }

 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
 		enum dma_data_direction direction)
 {
 	BUG_ON(direction == DMA_NONE);
 	__dma_sync(vaddr, size, (int)direction);
 }

 #endif /* __KERNEL__ */
 #endif	/* _ASM_DMA_MAPPING_H */
	/*
	* Copyright (C) 2004 IBM
	*
	* Implements the generic device dma API for powerpc.
	* the pci and vio busses
	*/
	#ifndef _ASM_DMA_MAPPING_H
	#define _ASM_DMA_MAPPING_H
	#ifdef __KERNEL__

	#include <linux/types.h>
	#include <linux/cache.h>
	/* need struct page definitions */
	#include <linux/mm.h>
	#include <linux/scatterlist.h>
	#include <linux/dma-attrs.h>
	#include <asm/io.h>
	#include <asm/swiotlb.h>

	#define DMA_ERROR_CODE (~(dma_addr_t)0x0)

	/* Some dma direct funcs must be visible for use in other dma_ops */
	extern void dma_direct_alloc_coherent(struct device dev, size_t size,
	dma_addr_t *dma_handle, gfp_t flag);
	extern void dma_direct_free_coherent(struct device *dev, size_t size,
	void *vaddr, dma_addr_t dma_handle);

	extern unsigned long get_dma_direct_offset(struct device *dev);

	#ifdef CONFIG_NOT_COHERENT_CACHE
	/*
	* DMA-consistent mapping functions for PowerPCs that don't support
	* cache snooping. These allocate/free a region of uncached mapped
	* memory space for use with DMA devices. Alternatively, you could
	* allocate the space "normally" and use the cache management functions
	* to ensure it is consistent.
	*/
	struct device;
	extern void __dma_alloc_coherent(struct device dev, size_t size,
	dma_addr_t *handle, gfp_t gfp);
	extern void __dma_free_coherent(size_t size, void *vaddr);
	extern void __dma_sync(void *vaddr, size_t size, int direction);
	extern void __dma_sync_page(struct page *page, unsigned long offset,
	size_t size, int direction);

	#else /* ! CONFIG_NOT_COHERENT_CACHE */
	/*
	* Cache coherent cores.
	*/

	#define __dma_alloc_coherent(dev, gfp, size, handle) NULL
	#define __dma_free_coherent(size, addr) ((void)0)
	#define __dma_sync(addr, size, rw) ((void)0)
	#define __dma_sync_page(pg, off, sz, rw) ((void)0)

	#endif /* ! CONFIG_NOT_COHERENT_CACHE */

	static inline unsigned long device_to_mask(struct device *dev)
	{
	if (dev->dma_mask && *dev->dma_mask)
	return *dev->dma_mask;
	/* Assume devices without mask can take 32 bit addresses */
	return 0xfffffffful;
	}

	/*
	* DMA operations are abstracted for G5 vs. i/pSeries, PCI vs. VIO
	*/
	struct dma_mapping_ops {
	void * (alloc_coherent)(struct device dev, size_t size,
	dma_addr_t *dma_handle, gfp_t flag);
	void (free_coherent)(struct device dev, size_t size,
	void *vaddr, dma_addr_t dma_handle);
	int (map_sg)(struct device dev, struct scatterlist *sg,
	int nents, enum dma_data_direction direction,
	struct dma_attrs *attrs);
	void (unmap_sg)(struct device dev, struct scatterlist *sg,
	int nents, enum dma_data_direction direction,
	struct dma_attrs *attrs);
	int (dma_supported)(struct device dev, u64 mask);
	int (set_dma_mask)(struct device dev, u64 dma_mask);
	dma_addr_t (map_page)(struct device dev, struct page *page,
	unsigned long offset, size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs);
	void (unmap_page)(struct device dev,
	dma_addr_t dma_address, size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs);
	int (addr_needs_map)(struct device dev, dma_addr_t addr,
	size_t size);
	#ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS
	void (sync_single_range_for_cpu)(struct device hwdev,
	dma_addr_t dma_handle, unsigned long offset,
	size_t size,
	enum dma_data_direction direction);
	void (sync_single_range_for_device)(struct device hwdev,
	dma_addr_t dma_handle, unsigned long offset,
	size_t size,
	enum dma_data_direction direction);
	void (sync_sg_for_cpu)(struct device hwdev,
	struct scatterlist *sg, int nelems,
	enum dma_data_direction direction);
	void (sync_sg_for_device)(struct device hwdev,
	struct scatterlist *sg, int nelems,
	enum dma_data_direction direction);
	#endif
	};

	/*
	* Available generic sets of operations
	*/
	#ifdef CONFIG_PPC64
	extern struct dma_mapping_ops dma_iommu_ops;
	#endif
	extern struct dma_mapping_ops dma_direct_ops;

	static inline struct dma_mapping_ops get_dma_ops(struct device dev)
	{
	/* We don't handle the NULL dev case for ISA for now. We could
	* do it via an out of line call but it is not needed for now. The
	* only ISA DMA device we support is the floppy and we have a hack
	* in the floppy driver directly to get a device for us.
	*/
	if (unlikely(dev == NULL))
	return NULL;

	return dev->archdata.dma_ops;
	}

	static inline void set_dma_ops(struct device dev, struct dma_mapping_ops ops)
	{
	dev->archdata.dma_ops = ops;
	}

	static inline int dma_supported(struct device *dev, u64 mask)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	if (unlikely(dma_ops == NULL))
	return 0;
	if (dma_ops->dma_supported == NULL)
	return 1;
	return dma_ops->dma_supported(dev, mask);
	}

	/* We have our own implementation of pci_set_dma_mask() */
	#define HAVE_ARCH_PCI_SET_DMA_MASK

	static inline int dma_set_mask(struct device *dev, u64 dma_mask)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	if (unlikely(dma_ops == NULL))
	return -EIO;
	if (dma_ops->set_dma_mask != NULL)
	return dma_ops->set_dma_mask(dev, dma_mask);
	if (!dev->dma_mask \|\| !dma_supported(dev, dma_mask))
	return -EIO;
	*dev->dma_mask = dma_mask;
	return 0;
	}

	/*
	* map_/unmap_single actually call through to map/unmap_page now that all the
	* dma_mapping_ops have been converted over. We just have to get the page and
	* offset to pass through to map_page
	*/
	static inline dma_addr_t dma_map_single_attrs(struct device *dev,
	void *cpu_addr,
	size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	return dma_ops->map_page(dev, virt_to_page(cpu_addr),
	(unsigned long)cpu_addr % PAGE_SIZE, size,
	direction, attrs);
	}

	static inline void dma_unmap_single_attrs(struct device *dev,
	dma_addr_t dma_addr,
	size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	dma_ops->unmap_page(dev, dma_addr, size, direction, attrs);
	}

	static inline dma_addr_t dma_map_page_attrs(struct device *dev,
	struct page *page,
	unsigned long offset, size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	return dma_ops->map_page(dev, page, offset, size, direction, attrs);
	}

	static inline void dma_unmap_page_attrs(struct device *dev,
	dma_addr_t dma_address,
	size_t size,
	enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	dma_ops->unmap_page(dev, dma_address, size, direction, attrs);
	}

	static inline int dma_map_sg_attrs(struct device dev, struct scatterlist sg,
	int nents, enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);
	return dma_ops->map_sg(dev, sg, nents, direction, attrs);
	}

	static inline void dma_unmap_sg_attrs(struct device *dev,
	struct scatterlist *sg,
	int nhwentries,
	enum dma_data_direction direction,
	struct dma_attrs *attrs)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);
	dma_ops->unmap_sg(dev, sg, nhwentries, direction, attrs);
	}

	static inline void dma_alloc_coherent(struct device dev, size_t size,
	dma_addr_t *dma_handle, gfp_t flag)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);
	return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
	}

	static inline void dma_free_coherent(struct device *dev, size_t size,
	void *cpu_addr, dma_addr_t dma_handle)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);
	dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
	}

	static inline dma_addr_t dma_map_single(struct device dev, void cpu_addr,
	size_t size,
	enum dma_data_direction direction)
	{
	return dma_map_single_attrs(dev, cpu_addr, size, direction, NULL);
	}

	static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
	size_t size,
	enum dma_data_direction direction)
	{
	dma_unmap_single_attrs(dev, dma_addr, size, direction, NULL);
	}

	static inline dma_addr_t dma_map_page(struct device dev, struct page page,
	unsigned long offset, size_t size,
	enum dma_data_direction direction)
	{
	return dma_map_page_attrs(dev, page, offset, size, direction, NULL);
	}

	static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
	size_t size,
	enum dma_data_direction direction)
	{
	dma_unmap_page_attrs(dev, dma_address, size, direction, NULL);
	}

	static inline int dma_map_sg(struct device dev, struct scatterlist sg,
	int nents, enum dma_data_direction direction)
	{
	return dma_map_sg_attrs(dev, sg, nents, direction, NULL);
	}

	static inline void dma_unmap_sg(struct device dev, struct scatterlist sg,
	int nhwentries,
	enum dma_data_direction direction)
	{
	dma_unmap_sg_attrs(dev, sg, nhwentries, direction, NULL);
	}

	#ifdef CONFIG_PPC_NEED_DMA_SYNC_OPS
	static inline void dma_sync_single_for_cpu(struct device *dev,
	dma_addr_t dma_handle, size_t size,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_single_range_for_cpu)
	dma_ops->sync_single_range_for_cpu(dev, dma_handle, 0,
	size, direction);
	}

	static inline void dma_sync_single_for_device(struct device *dev,
	dma_addr_t dma_handle, size_t size,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_single_range_for_device)
	dma_ops->sync_single_range_for_device(dev, dma_handle,
	0, size, direction);
	}

	static inline void dma_sync_sg_for_cpu(struct device *dev,
	struct scatterlist *sgl, int nents,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_sg_for_cpu)
	dma_ops->sync_sg_for_cpu(dev, sgl, nents, direction);
	}

	static inline void dma_sync_sg_for_device(struct device *dev,
	struct scatterlist *sgl, int nents,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_sg_for_device)
	dma_ops->sync_sg_for_device(dev, sgl, nents, direction);
	}

	static inline void dma_sync_single_range_for_cpu(struct device *dev,
	dma_addr_t dma_handle, unsigned long offset, size_t size,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_single_range_for_cpu)
	dma_ops->sync_single_range_for_cpu(dev, dma_handle,
	offset, size, direction);
	}

	static inline void dma_sync_single_range_for_device(struct device *dev,
	dma_addr_t dma_handle, unsigned long offset, size_t size,
	enum dma_data_direction direction)
	{
	struct dma_mapping_ops *dma_ops = get_dma_ops(dev);

	BUG_ON(!dma_ops);

	if (dma_ops->sync_single_range_for_device)
	dma_ops->sync_single_range_for_device(dev, dma_handle, offset,
	size, direction);
	}
	#else /* CONFIG_PPC_NEED_DMA_SYNC_OPS */
	static inline void dma_sync_single_for_cpu(struct device *dev,
	dma_addr_t dma_handle, size_t size,
	enum dma_data_direction direction)
	{
	}

	static inline void dma_sync_single_for_device(struct device *dev,
	dma_addr_t dma_handle, size_t size,
	enum dma_data_direction direction)
	{
	}

	static inline void dma_sync_sg_for_cpu(struct device *dev,
	struct scatterlist *sgl, int nents,
	enum dma_data_direction direction)
	{
	}

	static inline void dma_sync_sg_for_device(struct device *dev,
	struct scatterlist *sgl, int nents,
	enum dma_data_direction direction)
	{
	}

	static inline void dma_sync_single_range_for_cpu(struct device *dev,
	dma_addr_t dma_handle, unsigned long offset, size_t size,
	enum dma_data_direction direction)
	{
	}

	static inline void dma_sync_single_range_for_device(struct device *dev,
	dma_addr_t dma_handle, unsigned long offset, size_t size,
	enum dma_data_direction direction)
	{
	}
	#endif

	static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
	{
	#ifdef CONFIG_PPC64
	return (dma_addr == DMA_ERROR_CODE);
	#else
	return 0;
	#endif
	}

	#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
	#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
	#ifdef CONFIG_NOT_COHERENT_CACHE
	#define dma_is_consistent(d, h) (0)
	#else
	#define dma_is_consistent(d, h) (1)
	#endif

	static inline int dma_get_cache_alignment(void)
	{
	#ifdef CONFIG_PPC64
	/* no easy way to get cache size on all processors, so return
	* the maximum possible, to be safe */
	return (1 << INTERNODE_CACHE_SHIFT);
	#else
	/*
	* Each processor family will define its own L1_CACHE_SHIFT,
	* L1_CACHE_BYTES wraps to this, so this is always safe.
	*/
	return L1_CACHE_BYTES;
	#endif
	}

	static inline void dma_cache_sync(struct device dev, void vaddr, size_t size,
	enum dma_data_direction direction)
	{
	BUG_ON(direction == DMA_NONE);
	__dma_sync(vaddr, size, (int)direction);
	}

	#endif /* __KERNEL__ */
	#endif /* _ASM_DMA_MAPPING_H */