Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/arch/alpha/kernel/pci-noop.c | |
3 | * | |
4 | * Stub PCI interfaces for Jensen-specific kernels. | |
5 | */ | |
6 | ||
7 | #include <linux/pci.h> | |
8 | #include <linux/init.h> | |
9 | #include <linux/bootmem.h> | |
a9415644 | 10 | #include <linux/capability.h> |
1da177e4 LT |
11 | #include <linux/mm.h> |
12 | #include <linux/errno.h> | |
13 | #include <linux/sched.h> | |
14 | #include <linux/dma-mapping.h> | |
8c8d7214 | 15 | #include <linux/scatterlist.h> |
1da177e4 LT |
16 | |
17 | #include "proto.h" | |
18 | ||
19 | ||
20 | /* | |
21 | * The PCI controller list. | |
22 | */ | |
23 | ||
24 | struct pci_controller *hose_head, **hose_tail = &hose_head; | |
25 | struct pci_controller *pci_isa_hose; | |
26 | ||
27 | ||
28 | struct pci_controller * __init | |
29 | alloc_pci_controller(void) | |
30 | { | |
31 | struct pci_controller *hose; | |
32 | ||
33 | hose = alloc_bootmem(sizeof(*hose)); | |
34 | ||
35 | *hose_tail = hose; | |
36 | hose_tail = &hose->next; | |
37 | ||
38 | return hose; | |
39 | } | |
40 | ||
41 | struct resource * __init | |
42 | alloc_resource(void) | |
43 | { | |
44 | struct resource *res; | |
45 | ||
46 | res = alloc_bootmem(sizeof(*res)); | |
47 | ||
48 | return res; | |
49 | } | |
50 | ||
51 | asmlinkage long | |
52 | sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn) | |
53 | { | |
54 | struct pci_controller *hose; | |
55 | ||
56 | /* from hose or from bus.devfn */ | |
57 | if (which & IOBASE_FROM_HOSE) { | |
58 | for (hose = hose_head; hose; hose = hose->next) | |
59 | if (hose->index == bus) | |
60 | break; | |
61 | if (!hose) | |
62 | return -ENODEV; | |
63 | } else { | |
64 | /* Special hook for ISA access. */ | |
65 | if (bus == 0 && dfn == 0) | |
66 | hose = pci_isa_hose; | |
67 | else | |
68 | return -ENODEV; | |
69 | } | |
70 | ||
71 | switch (which & ~IOBASE_FROM_HOSE) { | |
72 | case IOBASE_HOSE: | |
73 | return hose->index; | |
74 | case IOBASE_SPARSE_MEM: | |
75 | return hose->sparse_mem_base; | |
76 | case IOBASE_DENSE_MEM: | |
77 | return hose->dense_mem_base; | |
78 | case IOBASE_SPARSE_IO: | |
79 | return hose->sparse_io_base; | |
80 | case IOBASE_DENSE_IO: | |
81 | return hose->dense_io_base; | |
82 | case IOBASE_ROOT_BUS: | |
83 | return hose->bus->number; | |
84 | } | |
85 | ||
86 | return -EOPNOTSUPP; | |
87 | } | |
88 | ||
89 | asmlinkage long | |
90 | sys_pciconfig_read(unsigned long bus, unsigned long dfn, | |
91 | unsigned long off, unsigned long len, void *buf) | |
92 | { | |
93 | if (!capable(CAP_SYS_ADMIN)) | |
94 | return -EPERM; | |
95 | else | |
96 | return -ENODEV; | |
97 | } | |
98 | ||
99 | asmlinkage long | |
100 | sys_pciconfig_write(unsigned long bus, unsigned long dfn, | |
101 | unsigned long off, unsigned long len, void *buf) | |
102 | { | |
103 | if (!capable(CAP_SYS_ADMIN)) | |
104 | return -EPERM; | |
105 | else | |
106 | return -ENODEV; | |
107 | } | |
108 | ||
109 | /* Stubs for the routines in pci_iommu.c: */ | |
110 | ||
111 | void * | |
ee0c468b IK |
112 | __pci_alloc_consistent(struct pci_dev *pdev, size_t size, |
113 | dma_addr_t *dma_addrp, gfp_t gfp) | |
1da177e4 LT |
114 | { |
115 | return NULL; | |
116 | } | |
117 | ||
118 | void | |
119 | pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu_addr, | |
120 | dma_addr_t dma_addr) | |
121 | { | |
122 | } | |
123 | ||
124 | dma_addr_t | |
125 | pci_map_single(struct pci_dev *pdev, void *cpu_addr, size_t size, | |
126 | int direction) | |
127 | { | |
128 | return (dma_addr_t) 0; | |
129 | } | |
130 | ||
131 | void | |
132 | pci_unmap_single(struct pci_dev *pdev, dma_addr_t dma_addr, size_t size, | |
133 | int direction) | |
134 | { | |
135 | } | |
136 | ||
137 | int | |
138 | pci_map_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, | |
139 | int direction) | |
140 | { | |
141 | return 0; | |
142 | } | |
143 | ||
144 | void | |
145 | pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sg, int nents, | |
146 | int direction) | |
147 | { | |
148 | } | |
149 | ||
150 | int | |
151 | pci_dma_supported(struct pci_dev *hwdev, dma_addr_t mask) | |
152 | { | |
153 | return 0; | |
154 | } | |
155 | ||
156 | /* Generic DMA mapping functions: */ | |
157 | ||
158 | void * | |
159 | dma_alloc_coherent(struct device *dev, size_t size, | |
55c5d74b | 160 | dma_addr_t *dma_handle, gfp_t gfp) |
1da177e4 LT |
161 | { |
162 | void *ret; | |
163 | ||
164 | if (!dev || *dev->dma_mask >= 0xffffffffUL) | |
165 | gfp &= ~GFP_DMA; | |
166 | ret = (void *)__get_free_pages(gfp, get_order(size)); | |
167 | if (ret) { | |
168 | memset(ret, 0, size); | |
fd2e2633 | 169 | *dma_handle = virt_to_phys(ret); |
1da177e4 LT |
170 | } |
171 | return ret; | |
172 | } | |
173 | ||
174 | EXPORT_SYMBOL(dma_alloc_coherent); | |
175 | ||
176 | int | |
8c8d7214 | 177 | dma_map_sg(struct device *dev, struct scatterlist *sgl, int nents, |
1da177e4 LT |
178 | enum dma_data_direction direction) |
179 | { | |
180 | int i; | |
8c8d7214 | 181 | struct scatterlist *sg; |
1da177e4 | 182 | |
8c8d7214 | 183 | for_each_sg(sgl, sg, nents, i) { |
1da177e4 LT |
184 | void *va; |
185 | ||
8c8d7214 FT |
186 | BUG_ON(!sg_page(sg)); |
187 | va = sg_virt(sg); | |
fd2e2633 | 188 | sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va); |
8c8d7214 | 189 | sg_dma_len(sg) = sg->length; |
1da177e4 LT |
190 | } |
191 | ||
192 | return nents; | |
193 | } | |
194 | ||
195 | EXPORT_SYMBOL(dma_map_sg); | |
196 | ||
197 | int | |
198 | dma_set_mask(struct device *dev, u64 mask) | |
199 | { | |
200 | if (!dev->dma_mask || !dma_supported(dev, mask)) | |
201 | return -EIO; | |
202 | ||
203 | *dev->dma_mask = mask; | |
204 | ||
205 | return 0; | |
206 | } | |
cff52daf | 207 | EXPORT_SYMBOL(dma_set_mask); |
1da177e4 LT |
208 | |
209 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
210 | { | |
211 | return NULL; | |
212 | } | |
213 | ||
214 | void pci_iounmap(struct pci_dev *dev, void __iomem * addr) | |
215 | { | |
216 | } | |
217 | ||
218 | EXPORT_SYMBOL(pci_iomap); | |
219 | EXPORT_SYMBOL(pci_iounmap); |