[mirror_ubuntu-artful-kernel.git] / arch / blackfin / include / asm / dma-mapping.h

/*
 * Copyright 2004-2009 Analog Devices Inc.
 *
 * Licensed under the GPL-2 or later.
 */

#ifndef _BLACKFIN_DMA_MAPPING_H
#define _BLACKFIN_DMA_MAPPING_H

#include <asm/cacheflush.h>

extern void
__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
static inline void
__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
{
	switch (dir) {
	case DMA_NONE:
		BUG();
	case DMA_TO_DEVICE:		/* writeback only */
		flush_dcache_range(addr, addr + size);
		break;
	case DMA_FROM_DEVICE: /* invalidate only */
	case DMA_BIDIRECTIONAL: /* flush and invalidate */
		/* Blackfin has no dedicated invalidate (it includes a flush) */
		invalidate_dcache_range(addr, addr + size);
		break;
	}
}
static inline void
_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
{
	if (__builtin_constant_p(dir))
		__dma_sync_inline(addr, size, dir);
	else
		__dma_sync(addr, size, dir);
}

extern const struct dma_map_ops bfin_dma_ops;

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
	return &bfin_dma_ops;
}

#endif				/* _BLACKFIN_DMA_MAPPING_H */
Commit	Line	Data
96f1050d RG	1	/*
	2	* Copyright 2004-2009 Analog Devices Inc.
	3	*
	4	* Licensed under the GPL-2 or later.
	5	*/
	6
1394f032 BW	7	#ifndef _BLACKFIN_DMA_MAPPING_H
	8	#define _BLACKFIN_DMA_MAPPING_H
	9
dd3b0e3e	10	#include <asm/cacheflush.h>
dd3b0e3e BS	11
	12	extern void
	13	__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
	14	static inline void
a3a6a590	15	__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
dd3b0e3e	16	{
dd3b0e3e BS	17	switch (dir) {
	18	case DMA_NONE:
	19	BUG();
	20	case DMA_TO_DEVICE: /* writeback only */
	21	flush_dcache_range(addr, addr + size);
	22	break;
	23	case DMA_FROM_DEVICE: /* invalidate only */
	24	case DMA_BIDIRECTIONAL: /* flush and invalidate */
	25	/* Blackfin has no dedicated invalidate (it includes a flush) */
	26	invalidate_dcache_range(addr, addr + size);
	27	break;
	28	}
	29	}
a3a6a590 SZ	30	static inline void
	31	_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
	32	{
	33	if (__builtin_constant_p(dir))
	34	__dma_sync_inline(addr, size, dir);
	35	else
	36	__dma_sync(addr, size, dir);
	37	}
dd3b0e3e	38
5299709d	39	extern const struct dma_map_ops bfin_dma_ops;
42b86e06	40
815dd187	41	static inline const struct dma_map_ops get_arch_dma_ops(struct bus_type bus)
42b86e06	42	{
6f620975	43	return &bfin_dma_ops;
42b86e06 FT	44	}
42b86e06 FT	45
1394f032	46	#endif /* _BLACKFIN_DMA_MAPPING_H */