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