[deliverable/linux.git] / arch / frv / include / asm / dma-mapping.h

#ifndef _ASM_DMA_MAPPING_H
#define _ASM_DMA_MAPPING_H

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

/*
 * See Documentation/DMA-API.txt for the description of how the
 * following DMA API should work.
 */

#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)

extern unsigned long __nongprelbss dma_coherent_mem_start;
extern unsigned long __nongprelbss dma_coherent_mem_end;

void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp);
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);

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

extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
		      enum dma_data_direction direction);

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

extern
dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long offset,
			size_t size, enum dma_data_direction direction);

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


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)
{
	flush_write_buffers();
}

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)
{
	flush_write_buffers();
}

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

static inline
void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
			    enum dma_data_direction direction)
{
	flush_write_buffers();
}

static inline
int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
	return 0;
}

static inline
int dma_supported(struct device *dev, u64 mask)
{
        /*
         * we fall back to GFP_DMA when the mask isn't all 1s,
         * so we can't guarantee allocations that must be
         * within a tighter range than GFP_DMA..
         */
        if (mask < 0x00ffffff)
                return 0;

	return 1;
}

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
void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
		    enum dma_data_direction direction)
{
	flush_write_buffers();
}

/* Not supported for now */
static inline int dma_mmap_coherent(struct device *dev,
				    struct vm_area_struct *vma, void *cpu_addr,
				    dma_addr_t dma_addr, size_t size)
{
	return -EINVAL;
}

static inline int dma_get_sgtable(struct device *dev, struct sg_table *sgt,
				  void *cpu_addr, dma_addr_t dma_addr,
				  size_t size)
{
	return -EINVAL;
}

#endif  /* _ASM_DMA_MAPPING_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ASM_DMA_MAPPING_H
	2	#define _ASM_DMA_MAPPING_H
	3
	4	#include <linux/device.h>
	5	#include <asm/cache.h>
	6	#include <asm/cacheflush.h>
	7	#include <asm/scatterlist.h>
	8	#include <asm/io.h>
	9
027491f4 FT	10	/*
	11	* See Documentation/DMA-API.txt for the description of how the
	12	* following DMA API should work.
	13	*/
	14
1da177e4 LT	15	#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
	16	#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
	17
	18	extern unsigned long __nongprelbss dma_coherent_mem_start;
	19	extern unsigned long __nongprelbss dma_coherent_mem_end;
	20
a5da7d3c	21	void dma_alloc_coherent(struct device dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp);
1da177e4 LT	22	void dma_free_coherent(struct device dev, size_t size, void vaddr, dma_addr_t dma_handle);
1da177e4 LT	23
1da177e4 LT	24	extern dma_addr_t dma_map_single(struct device dev, void ptr, size_t size,
	25	enum dma_data_direction direction);
	26
1da177e4 LT	27	static inline
	28	void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
	29	enum dma_data_direction direction)
	30	{
	31	BUG_ON(direction == DMA_NONE);
	32	}
	33
1da177e4 LT	34	extern int dma_map_sg(struct device dev, struct scatterlist sg, int nents,
	35	enum dma_data_direction direction);
	36
1da177e4 LT	37	static inline
	38	void dma_unmap_sg(struct device dev, struct scatterlist sg, int nhwentries,
	39	enum dma_data_direction direction)
	40	{
	41	BUG_ON(direction == DMA_NONE);
	42	}
	43
	44	extern
	45	dma_addr_t dma_map_page(struct device dev, struct page page, unsigned long offset,
	46	size_t size, enum dma_data_direction direction);
	47
	48	static inline
	49	void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
	50	enum dma_data_direction direction)
	51	{
	52	BUG_ON(direction == DMA_NONE);
	53	}
	54
	55
	56	static inline
	57	void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
	58	enum dma_data_direction direction)
	59	{
	60	}
	61
	62	static inline
	63	void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
	64	enum dma_data_direction direction)
	65	{
	66	flush_write_buffers();
	67	}
	68
	69	static inline
	70	void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
	71	unsigned long offset, size_t size,
	72	enum dma_data_direction direction)
	73	{
	74	}
	75
	76	static inline
	77	void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
	78	unsigned long offset, size_t size,
	79	enum dma_data_direction direction)
	80	{
	81	flush_write_buffers();
	82	}
	83
	84	static inline
	85	void dma_sync_sg_for_cpu(struct device dev, struct scatterlist sg, int nelems,
	86	enum dma_data_direction direction)
	87	{
	88	}
	89
	90	static inline
	91	void dma_sync_sg_for_device(struct device dev, struct scatterlist sg, int nelems,
	92	enum dma_data_direction direction)
	93	{
	94	flush_write_buffers();
	95	}
	96
	97	static inline
8d8bb39b	98	int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
1da177e4 LT	99	{
	100	return 0;
	101	}
	102
	103	static inline
	104	int dma_supported(struct device *dev, u64 mask)
	105	{
	106	/*
	107	* we fall back to GFP_DMA when the mask isn't all 1s,
	108	* so we can't guarantee allocations that must be
	109	* within a tighter range than GFP_DMA..
	110	*/
	111	if (mask < 0x00ffffff)
	112	return 0;
	113
	114	return 1;
	115	}
	116
	117	static inline
	118	int dma_set_mask(struct device *dev, u64 mask)
	119	{
	120	if (!dev->dma_mask \|\| !dma_supported(dev, mask))
	121	return -EIO;
	122
	123	*dev->dma_mask = mask;
	124
	125	return 0;
	126	}
	127
1da177e4	128	static inline
d3fa72e4	129	void dma_cache_sync(struct device dev, void vaddr, size_t size,
1da177e4 LT	130	enum dma_data_direction direction)
	131	{
	132	flush_write_buffers();
	133	}
	134
5fd38112 GU	135	/* Not supported for now */
	136	static inline int dma_mmap_coherent(struct device *dev,
	137	struct vm_area_struct vma, void cpu_addr,
	138	dma_addr_t dma_addr, size_t size)
	139	{
	140	return -EINVAL;
	141	}
	142
	143	static inline int dma_get_sgtable(struct device dev, struct sg_table sgt,
	144	void *cpu_addr, dma_addr_t dma_addr,
	145	size_t size)
	146	{
	147	return -EINVAL;
	148	}
	149
1da177e4	150	#endif /* _ASM_DMA_MAPPING_H */