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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> | |
5a0e3ad6 | 10 | #include <linux/gfp.h> |
a9415644 | 11 | #include <linux/capability.h> |
1da177e4 LT |
12 | #include <linux/mm.h> |
13 | #include <linux/errno.h> | |
14 | #include <linux/sched.h> | |
15 | #include <linux/dma-mapping.h> | |
8c8d7214 | 16 | #include <linux/scatterlist.h> |
1da177e4 LT |
17 | |
18 | #include "proto.h" | |
19 | ||
20 | ||
21 | /* | |
22 | * The PCI controller list. | |
23 | */ | |
24 | ||
25 | struct pci_controller *hose_head, **hose_tail = &hose_head; | |
26 | struct pci_controller *pci_isa_hose; | |
27 | ||
28 | ||
29 | struct pci_controller * __init | |
30 | alloc_pci_controller(void) | |
31 | { | |
32 | struct pci_controller *hose; | |
33 | ||
34 | hose = alloc_bootmem(sizeof(*hose)); | |
35 | ||
36 | *hose_tail = hose; | |
37 | hose_tail = &hose->next; | |
38 | ||
39 | return hose; | |
40 | } | |
41 | ||
42 | struct resource * __init | |
43 | alloc_resource(void) | |
44 | { | |
45 | struct resource *res; | |
46 | ||
47 | res = alloc_bootmem(sizeof(*res)); | |
48 | ||
49 | return res; | |
50 | } | |
51 | ||
52 | asmlinkage long | |
53 | sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn) | |
54 | { | |
55 | struct pci_controller *hose; | |
56 | ||
57 | /* from hose or from bus.devfn */ | |
58 | if (which & IOBASE_FROM_HOSE) { | |
59 | for (hose = hose_head; hose; hose = hose->next) | |
60 | if (hose->index == bus) | |
61 | break; | |
62 | if (!hose) | |
63 | return -ENODEV; | |
64 | } else { | |
65 | /* Special hook for ISA access. */ | |
66 | if (bus == 0 && dfn == 0) | |
67 | hose = pci_isa_hose; | |
68 | else | |
69 | return -ENODEV; | |
70 | } | |
71 | ||
72 | switch (which & ~IOBASE_FROM_HOSE) { | |
73 | case IOBASE_HOSE: | |
74 | return hose->index; | |
75 | case IOBASE_SPARSE_MEM: | |
76 | return hose->sparse_mem_base; | |
77 | case IOBASE_DENSE_MEM: | |
78 | return hose->dense_mem_base; | |
79 | case IOBASE_SPARSE_IO: | |
80 | return hose->sparse_io_base; | |
81 | case IOBASE_DENSE_IO: | |
82 | return hose->dense_io_base; | |
83 | case IOBASE_ROOT_BUS: | |
84 | return hose->bus->number; | |
85 | } | |
86 | ||
87 | return -EOPNOTSUPP; | |
88 | } | |
89 | ||
90 | asmlinkage long | |
91 | sys_pciconfig_read(unsigned long bus, unsigned long dfn, | |
92 | unsigned long off, unsigned long len, void *buf) | |
93 | { | |
94 | if (!capable(CAP_SYS_ADMIN)) | |
95 | return -EPERM; | |
96 | else | |
97 | return -ENODEV; | |
98 | } | |
99 | ||
100 | asmlinkage long | |
101 | sys_pciconfig_write(unsigned long bus, unsigned long dfn, | |
102 | unsigned long off, unsigned long len, void *buf) | |
103 | { | |
104 | if (!capable(CAP_SYS_ADMIN)) | |
105 | return -EPERM; | |
106 | else | |
107 | return -ENODEV; | |
108 | } | |
109 | ||
c186caca | 110 | static void *alpha_noop_alloc_coherent(struct device *dev, size_t size, |
4ce9a91f | 111 | dma_addr_t *dma_handle, gfp_t gfp, |
00085f1e | 112 | unsigned long attrs) |
1da177e4 LT |
113 | { |
114 | void *ret; | |
115 | ||
116 | if (!dev || *dev->dma_mask >= 0xffffffffUL) | |
117 | gfp &= ~GFP_DMA; | |
118 | ret = (void *)__get_free_pages(gfp, get_order(size)); | |
119 | if (ret) { | |
120 | memset(ret, 0, size); | |
fd2e2633 | 121 | *dma_handle = virt_to_phys(ret); |
1da177e4 LT |
122 | } |
123 | return ret; | |
124 | } | |
125 | ||
c186caca FT |
126 | static int alpha_noop_supported(struct device *dev, u64 mask) |
127 | { | |
128 | return mask < 0x00ffffffUL ? 0 : 1; | |
129 | } | |
1da177e4 | 130 | |
5299709d | 131 | const struct dma_map_ops alpha_noop_ops = { |
4ce9a91f | 132 | .alloc = alpha_noop_alloc_coherent, |
6aca0503 CB |
133 | .free = dma_noop_free_coherent, |
134 | .map_page = dma_noop_map_page, | |
135 | .map_sg = dma_noop_map_sg, | |
136 | .mapping_error = dma_noop_mapping_error, | |
c186caca | 137 | .dma_supported = alpha_noop_supported, |
c186caca FT |
138 | }; |
139 | ||
5299709d | 140 | const struct dma_map_ops *dma_ops = &alpha_noop_ops; |
c186caca | 141 | EXPORT_SYMBOL(dma_ops); |