1#ifndef __ASM_SH_DMA_MAPPING_H
2#define __ASM_SH_DMA_MAPPING_H
3
4extern struct dma_map_ops *dma_ops;
5extern void no_iommu_init(void);
6
7static inline struct dma_map_ops *get_dma_ops(struct device *dev)
8{
9	return dma_ops;
10}
11
12#include <asm-generic/dma-coherent.h>
13#include <asm-generic/dma-mapping-common.h>
14
15static inline int dma_supported(struct device *dev, u64 mask)
16{
17	struct dma_map_ops *ops = get_dma_ops(dev);
18
19	if (ops->dma_supported)
20		return ops->dma_supported(dev, mask);
21
22	return 1;
23}
24
25static inline int dma_set_mask(struct device *dev, u64 mask)
26{
27	struct dma_map_ops *ops = get_dma_ops(dev);
28
29	if (!dev->dma_mask || !dma_supported(dev, mask))
30		return -EIO;
31	if (ops->set_dma_mask)
32		return ops->set_dma_mask(dev, mask);
33
34	*dev->dma_mask = mask;
35
36	return 0;
37}
38
39void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
40		    enum dma_data_direction dir);
41
42#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
43#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
44
45static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
46{
47	struct dma_map_ops *ops = get_dma_ops(dev);
48
49	debug_dma_mapping_error(dev, dma_addr);
50	if (ops->mapping_error)
51		return ops->mapping_error(dev, dma_addr);
52
53	return dma_addr == 0;
54}
55
56#define dma_alloc_coherent(d,s,h,f)	dma_alloc_attrs(d,s,h,f,NULL)
57
58static inline void *dma_alloc_attrs(struct device *dev, size_t size,
59				    dma_addr_t *dma_handle, gfp_t gfp,
60				    struct dma_attrs *attrs)
61{
62	struct dma_map_ops *ops = get_dma_ops(dev);
63	void *memory;
64
65	if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
66		return memory;
67	if (!ops->alloc)
68		return NULL;
69
70	memory = ops->alloc(dev, size, dma_handle, gfp, attrs);
71	debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
72
73	return memory;
74}
75
76#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
77
78static inline void dma_free_attrs(struct device *dev, size_t size,
79				  void *vaddr, dma_addr_t dma_handle,
80				  struct dma_attrs *attrs)
81{
82	struct dma_map_ops *ops = get_dma_ops(dev);
83
84	if (dma_release_from_coherent(dev, get_order(size), vaddr))
85		return;
86
87	debug_dma_free_coherent(dev, size, vaddr, dma_handle);
88	if (ops->free)
89		ops->free(dev, size, vaddr, dma_handle, attrs);
90}
91
92/* arch/sh/mm/consistent.c */
93extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
94					dma_addr_t *dma_addr, gfp_t flag,
95					struct dma_attrs *attrs);
96extern void dma_generic_free_coherent(struct device *dev, size_t size,
97				      void *vaddr, dma_addr_t dma_handle,
98				      struct dma_attrs *attrs);
99
100#endif /* __ASM_SH_DMA_MAPPING_H */
101