tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2003 - 2005 Tensilica Inc.
7 * Copyright (C) 2015 Cadence Design Systems Inc.
8 */
9
10#ifndef _XTENSA_DMA_MAPPING_H
11#define _XTENSA_DMA_MAPPING_H
12
13#include <asm/cache.h>
14#include <asm/io.h>
15
16#include <linux/mm.h>
17#include <linux/scatterlist.h>
18
19#define DMA_ERROR_CODE (~(dma_addr_t)0x0)
20
21extern struct dma_map_ops xtensa_dma_map_ops;
22
23static inline struct dma_map_ops *get_dma_ops(struct device *dev)
24{
25 if (dev && dev->archdata.dma_ops)
26 return dev->archdata.dma_ops;
27 else
28 return &xtensa_dma_map_ops;
29}
30
31void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
32 enum dma_data_direction direction);
33
34static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
35{
36 return (dma_addr_t)paddr;
37}
38
39static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
40{
41 return (phys_addr_t)daddr;
42}
43
44#endif /* _XTENSA_DMA_MAPPING_H */