tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_DMA_MAPPING_H
2#define _ASM_DMA_MAPPING_H
3
4#include <asm/scatterlist.h>
5#include <asm/dma-coherence.h>
6#include <asm/cache.h>
7#include <asm-generic/dma-coherent.h>
8
9#ifndef CONFIG_SGI_IP27 /* Kludge to fix 2.6.39 build for IP27 */
10#include <dma-coherence.h>
11#endif
12
13extern struct dma_map_ops *mips_dma_map_ops;
14
15static inline struct dma_map_ops *get_dma_ops(struct device *dev)
16{
17 if (dev && dev->archdata.dma_ops)
18 return dev->archdata.dma_ops;
19 else
20 return mips_dma_map_ops;
21}
22
23static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
24{
25 if (!dev->dma_mask)
26 return 0;
27
28 return addr + size <= *dev->dma_mask;
29}
30
31static inline void dma_mark_clean(void *addr, size_t size) {}
32
33#include <asm-generic/dma-mapping-common.h>
34
35static inline int dma_supported(struct device *dev, u64 mask)
36{
37 struct dma_map_ops *ops = get_dma_ops(dev);
38 return ops->dma_supported(dev, mask);
39}
40
41static inline int dma_mapping_error(struct device *dev, u64 mask)
42{
43 struct dma_map_ops *ops = get_dma_ops(dev);
44
45 debug_dma_mapping_error(dev, mask);
46 return ops->mapping_error(dev, mask);
47}
48
49static inline int
50dma_set_mask(struct device *dev, u64 mask)
51{
52 if(!dev->dma_mask || !dma_supported(dev, mask))
53 return -EIO;
54
55 *dev->dma_mask = mask;
56
57 return 0;
58}
59
60extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
61 enum dma_data_direction direction);
62
63#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
64
65static inline void *dma_alloc_attrs(struct device *dev, size_t size,
66 dma_addr_t *dma_handle, gfp_t gfp,
67 struct dma_attrs *attrs)
68{
69 void *ret;
70 struct dma_map_ops *ops = get_dma_ops(dev);
71
72 ret = ops->alloc(dev, size, dma_handle, gfp, attrs);
73
74 debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
75
76 return ret;
77}
78
79#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
80
81static inline void dma_free_attrs(struct device *dev, size_t size,
82 void *vaddr, dma_addr_t dma_handle,
83 struct dma_attrs *attrs)
84{
85 struct dma_map_ops *ops = get_dma_ops(dev);
86
87 ops->free(dev, size, vaddr, dma_handle, attrs);
88
89 debug_dma_free_coherent(dev, size, vaddr, dma_handle);
90}
91
92
93void *dma_alloc_noncoherent(struct device *dev, size_t size,
94 dma_addr_t *dma_handle, gfp_t flag);
95
96void dma_free_noncoherent(struct device *dev, size_t size,
97 void *vaddr, dma_addr_t dma_handle);
98
99#endif /* _ASM_DMA_MAPPING_H */