tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
12 * more details.
13 */
14
15#ifndef _ASM_TILE_DMA_MAPPING_H
16#define _ASM_TILE_DMA_MAPPING_H
17
18#include <linux/mm.h>
19#include <linux/scatterlist.h>
20#include <linux/cache.h>
21#include <linux/io.h>
22
23#ifdef __tilegx__
24#define ARCH_HAS_DMA_GET_REQUIRED_MASK
25#endif
26
27extern struct dma_map_ops *tile_dma_map_ops;
28extern struct dma_map_ops *gx_pci_dma_map_ops;
29extern struct dma_map_ops *gx_legacy_pci_dma_map_ops;
30extern struct dma_map_ops *gx_hybrid_pci_dma_map_ops;
31
32static inline struct dma_map_ops *get_dma_ops(struct device *dev)
33{
34 if (dev && dev->archdata.dma_ops)
35 return dev->archdata.dma_ops;
36 else
37 return tile_dma_map_ops;
38}
39
40static inline dma_addr_t get_dma_offset(struct device *dev)
41{
42 return dev->archdata.dma_offset;
43}
44
45static inline void set_dma_offset(struct device *dev, dma_addr_t off)
46{
47 dev->archdata.dma_offset = off;
48}
49
50static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
51{
52 return paddr;
53}
54
55static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
56{
57 return daddr;
58}
59
60static inline void dma_mark_clean(void *addr, size_t size) {}
61
62static inline void set_dma_ops(struct device *dev, struct dma_map_ops *ops)
63{
64 dev->archdata.dma_ops = ops;
65}
66
67static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
68{
69 if (!dev->dma_mask)
70 return 0;
71
72 return addr + size - 1 <= *dev->dma_mask;
73}
74
75#define HAVE_ARCH_DMA_SET_MASK 1
76int dma_set_mask(struct device *dev, u64 mask);
77
78/*
79 * dma_alloc_noncoherent() is #defined to return coherent memory,
80 * so there's no need to do any flushing here.
81 */
82static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
83 enum dma_data_direction direction)
84{
85}
86
87#endif /* _ASM_TILE_DMA_MAPPING_H */