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> | |
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 | ||
c186caca FT |
109 | static void *alpha_noop_alloc_coherent(struct device *dev, size_t size, |
110 | dma_addr_t *dma_handle, gfp_t gfp) | |
1da177e4 LT |
111 | { |
112 | void *ret; | |
113 | ||
114 | if (!dev || *dev->dma_mask >= 0xffffffffUL) | |
115 | gfp &= ~GFP_DMA; | |
116 | ret = (void *)__get_free_pages(gfp, get_order(size)); | |
117 | if (ret) { | |
118 | memset(ret, 0, size); | |
fd2e2633 | 119 | *dma_handle = virt_to_phys(ret); |
1da177e4 LT |
120 | } |
121 | return ret; | |
122 | } | |
123 | ||
c186caca FT |
124 | static void alpha_noop_free_coherent(struct device *dev, size_t size, |
125 | void *cpu_addr, dma_addr_t dma_addr) | |
126 | { | |
127 | free_pages((unsigned long)cpu_addr, get_order(size)); | |
128 | } | |
129 | ||
130 | static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page, | |
131 | unsigned long offset, size_t size, | |
132 | enum dma_data_direction dir, | |
133 | struct dma_attrs *attrs) | |
134 | { | |
135 | return page_to_pa(page) + offset; | |
136 | } | |
1da177e4 | 137 | |
c186caca FT |
138 | static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents, |
139 | enum dma_data_direction dir, struct dma_attrs *attrs) | |
1da177e4 LT |
140 | { |
141 | int i; | |
8c8d7214 | 142 | struct scatterlist *sg; |
1da177e4 | 143 | |
8c8d7214 | 144 | for_each_sg(sgl, sg, nents, i) { |
1da177e4 LT |
145 | void *va; |
146 | ||
8c8d7214 FT |
147 | BUG_ON(!sg_page(sg)); |
148 | va = sg_virt(sg); | |
fd2e2633 | 149 | sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va); |
8c8d7214 | 150 | sg_dma_len(sg) = sg->length; |
1da177e4 LT |
151 | } |
152 | ||
153 | return nents; | |
154 | } | |
155 | ||
c186caca FT |
156 | static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr) |
157 | { | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static int alpha_noop_supported(struct device *dev, u64 mask) | |
162 | { | |
163 | return mask < 0x00ffffffUL ? 0 : 1; | |
164 | } | |
1da177e4 | 165 | |
c186caca | 166 | static int alpha_noop_set_mask(struct device *dev, u64 mask) |
1da177e4 LT |
167 | { |
168 | if (!dev->dma_mask || !dma_supported(dev, mask)) | |
169 | return -EIO; | |
170 | ||
171 | *dev->dma_mask = mask; | |
1da177e4 LT |
172 | return 0; |
173 | } | |
c186caca FT |
174 | |
175 | struct dma_map_ops alpha_noop_ops = { | |
176 | .alloc_coherent = alpha_noop_alloc_coherent, | |
177 | .free_coherent = alpha_noop_free_coherent, | |
178 | .map_page = alpha_noop_map_page, | |
179 | .map_sg = alpha_noop_map_sg, | |
180 | .mapping_error = alpha_noop_mapping_error, | |
181 | .dma_supported = alpha_noop_supported, | |
182 | .set_dma_mask = alpha_noop_set_mask, | |
183 | }; | |
184 | ||
185 | struct dma_map_ops *dma_ops = &alpha_noop_ops; | |
186 | EXPORT_SYMBOL(dma_ops); | |
1da177e4 LT |
187 | |
188 | void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen) | |
189 | { | |
190 | return NULL; | |
191 | } | |
192 | ||
193 | void pci_iounmap(struct pci_dev *dev, void __iomem * addr) | |
194 | { | |
195 | } | |
196 | ||
197 | EXPORT_SYMBOL(pci_iomap); | |
198 | EXPORT_SYMBOL(pci_iounmap); |