[AVR32] Fix wrong pt_regs in critical exception handler
[linux-2.6] / include / asm-sh64 / dma-mapping.h
1 #ifndef __ASM_SH_DMA_MAPPING_H
2 #define __ASM_SH_DMA_MAPPING_H
3
4 #include <linux/mm.h>
5 #include <linux/scatterlist.h>
6 #include <asm/io.h>
7
8 struct pci_dev;
9 extern void *consistent_alloc(struct pci_dev *hwdev, size_t size,
10                                     dma_addr_t *dma_handle);
11 extern void consistent_free(struct pci_dev *hwdev, size_t size,
12                                   void *vaddr, dma_addr_t dma_handle);
13
14 #define dma_supported(dev, mask)        (1)
15
16 static inline int dma_set_mask(struct device *dev, u64 mask)
17 {
18         if (!dev->dma_mask || !dma_supported(dev, mask))
19                 return -EIO;
20
21         *dev->dma_mask = mask;
22
23         return 0;
24 }
25
26 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
27                          dma_addr_t *dma_handle, gfp_t flag)
28 {
29         return consistent_alloc(NULL, size, dma_handle);
30 }
31
32 static inline void dma_free_coherent(struct device *dev, size_t size,
33                        void *vaddr, dma_addr_t dma_handle)
34 {
35         consistent_free(NULL, size, vaddr, dma_handle);
36 }
37
38 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
39 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
40 #define dma_is_consistent(d, h) (1)
41
42 static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
43                                   enum dma_data_direction dir)
44 {
45         unsigned long start = (unsigned long) vaddr;
46         unsigned long s = start & L1_CACHE_ALIGN_MASK;
47         unsigned long e = (start + size) & L1_CACHE_ALIGN_MASK;
48
49         for (; s <= e; s += L1_CACHE_BYTES)
50                 asm volatile ("ocbp     %0, 0" : : "r" (s));
51 }
52
53 static inline dma_addr_t dma_map_single(struct device *dev,
54                                         void *ptr, size_t size,
55                                         enum dma_data_direction dir)
56 {
57 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
58         if (dev->bus == &pci_bus_type)
59                 return virt_to_phys(ptr);
60 #endif
61         dma_cache_sync(dev, ptr, size, dir);
62
63         return virt_to_phys(ptr);
64 }
65
66 #define dma_unmap_single(dev, addr, size, dir)  do { } while (0)
67
68 static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
69                              int nents, enum dma_data_direction dir)
70 {
71         int i;
72
73         for (i = 0; i < nents; i++) {
74 #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
75                 dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
76 #endif
77                 sg[i].dma_address = sg_phys(&sg[i]);
78         }
79
80         return nents;
81 }
82
83 #define dma_unmap_sg(dev, sg, nents, dir)       do { } while (0)
84
85 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
86                                       unsigned long offset, size_t size,
87                                       enum dma_data_direction dir)
88 {
89         return dma_map_single(dev, page_address(page) + offset, size, dir);
90 }
91
92 static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
93                                   size_t size, enum dma_data_direction dir)
94 {
95         dma_unmap_single(dev, dma_address, size, dir);
96 }
97
98 static inline void dma_sync_single(struct device *dev, dma_addr_t dma_handle,
99                                    size_t size, enum dma_data_direction dir)
100 {
101 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
102         if (dev->bus == &pci_bus_type)
103                 return;
104 #endif
105         dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
106 }
107
108 static inline void dma_sync_single_range(struct device *dev,
109                                          dma_addr_t dma_handle,
110                                          unsigned long offset, size_t size,
111                                          enum dma_data_direction dir)
112 {
113 #if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
114         if (dev->bus == &pci_bus_type)
115                 return;
116 #endif
117         dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
118 }
119
120 static inline void dma_sync_sg(struct device *dev, struct scatterlist *sg,
121                                int nelems, enum dma_data_direction dir)
122 {
123         int i;
124
125         for (i = 0; i < nelems; i++) {
126 #if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
127                 dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
128 #endif
129                 sg[i].dma_address = sg_phys(&sg[i]);
130         }
131 }
132
133 static inline void dma_sync_single_for_cpu(struct device *dev,
134                                            dma_addr_t dma_handle, size_t size,
135                                            enum dma_data_direction dir)
136 {
137         dma_sync_single(dev, dma_handle, size, dir);
138 }
139
140 static inline void dma_sync_single_for_device(struct device *dev,
141                                            dma_addr_t dma_handle, size_t size,
142                                            enum dma_data_direction dir)
143 {
144         dma_sync_single(dev, dma_handle, size, dir);
145 }
146
147 static inline void dma_sync_single_range_for_cpu(struct device *dev,
148                                                  dma_addr_t dma_handle,
149                                                  unsigned long offset,
150                                                  size_t size,
151                                                  enum dma_data_direction direction)
152 {
153         dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
154 }
155
156 static inline void dma_sync_single_range_for_device(struct device *dev,
157                                                     dma_addr_t dma_handle,
158                                                     unsigned long offset,
159                                                     size_t size,
160                                                     enum dma_data_direction direction)
161 {
162         dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
163 }
164
165 static inline void dma_sync_sg_for_cpu(struct device *dev,
166                                        struct scatterlist *sg, int nelems,
167                                        enum dma_data_direction dir)
168 {
169         dma_sync_sg(dev, sg, nelems, dir);
170 }
171
172 static inline void dma_sync_sg_for_device(struct device *dev,
173                                        struct scatterlist *sg, int nelems,
174                                        enum dma_data_direction dir)
175 {
176         dma_sync_sg(dev, sg, nelems, dir);
177 }
178
179 static inline int dma_get_cache_alignment(void)
180 {
181         /*
182          * Each processor family will define its own L1_CACHE_SHIFT,
183          * L1_CACHE_BYTES wraps to this, so this is always safe.
184          */
185         return L1_CACHE_BYTES;
186 }
187
188 static inline int dma_mapping_error(dma_addr_t dma_addr)
189 {
190         return dma_addr == 0;
191 }
192
193 #endif /* __ASM_SH_DMA_MAPPING_H */
194