summaryrefslogtreecommitdiffstats
path: root/arch/xtensa/include/asm/dma-mapping.h
blob: 9eecfc3c5dc4045c4de3ac7de2306e8cfc751463 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 2003 - 2005 Tensilica Inc.
 * Copyright (C) 2015 Cadence Design Systems Inc.
 */

#ifndef _XTENSA_DMA_MAPPING_H
#define _XTENSA_DMA_MAPPING_H

#include <asm/cache.h>
#include <asm/io.h>

#include <linux/mm.h>
#include <linux/scatterlist.h>

#define DMA_ERROR_CODE		(~(dma_addr_t)0x0)

extern const struct dma_map_ops xtensa_dma_map_ops;

static inline const struct dma_map_ops *get_dma_ops(struct device *dev)
{
	if (dev && dev->dma_ops)
		return dev->dma_ops;
	else
		return &xtensa_dma_map_ops;
}

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

static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
	return (dma_addr_t)paddr;
}

static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
	return (phys_addr_t)daddr;
}

#endif	/* _XTENSA_DMA_MAPPING_H */