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727ce158 | 1 | /* |
727ce158 MM |
2 | * The PCI Library -- User Access |
3 | * | |
52aecc75 | 4 | * Copyright (c) 1997--2014 Martin Mares <mj@ucw.cz> |
727ce158 MM |
5 | * |
6 | * Can be freely distributed and used under the terms of the GNU GPL. | |
7 | */ | |
8 | ||
9 | #include <stdio.h> | |
10 | #include <stdlib.h> | |
11 | #include <stdarg.h> | |
12 | #include <string.h> | |
13 | ||
14 | #include "internal.h" | |
15 | ||
727ce158 MM |
16 | void |
17 | pci_scan_bus(struct pci_access *a) | |
18 | { | |
19 | a->methods->scan(a); | |
20 | } | |
21 | ||
22 | struct pci_dev * | |
23 | pci_alloc_dev(struct pci_access *a) | |
24 | { | |
25 | struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev)); | |
26 | ||
1ac3a99d | 27 | memset(d, 0, sizeof(*d)); |
727ce158 MM |
28 | d->access = a; |
29 | d->methods = a->methods; | |
84c8d1bb | 30 | d->hdrtype = -1; |
90ec4a6d | 31 | d->numa_node = -1; |
727ce158 MM |
32 | if (d->methods->init_dev) |
33 | d->methods->init_dev(d); | |
34 | return d; | |
35 | } | |
36 | ||
37 | int | |
38 | pci_link_dev(struct pci_access *a, struct pci_dev *d) | |
39 | { | |
40 | d->next = a->devices; | |
41 | a->devices = d; | |
42 | ||
4186391b MM |
43 | /* |
44 | * Applications compiled with older versions of libpci do not expect | |
45 | * 32-bit domain numbers. To keep them working, we keep a 16-bit | |
46 | * version of the domain number at the previous location in struct | |
47 | * pci_dev. This will keep backward compatibility on systems which | |
48 | * don't require large domain numbers. | |
49 | */ | |
50 | if (d->domain > 0xffff) | |
51 | d->domain_16 = 0xffff; | |
52 | else | |
53 | d->domain_16 = d->domain; | |
54 | ||
727ce158 MM |
55 | return 1; |
56 | } | |
57 | ||
58 | struct pci_dev * | |
84c8d1bb | 59 | pci_get_dev(struct pci_access *a, int domain, int bus, int dev, int func) |
727ce158 MM |
60 | { |
61 | struct pci_dev *d = pci_alloc_dev(a); | |
62 | ||
84c8d1bb | 63 | d->domain = domain; |
727ce158 MM |
64 | d->bus = bus; |
65 | d->dev = dev; | |
66 | d->func = func; | |
67 | return d; | |
68 | } | |
69 | ||
70 | void pci_free_dev(struct pci_dev *d) | |
71 | { | |
72 | if (d->methods->cleanup_dev) | |
73 | d->methods->cleanup_dev(d); | |
6d5e39ac | 74 | pci_free_caps(d); |
b1861a8d | 75 | pci_mfree(d->module_alias); |
aecf5b35 | 76 | pci_mfree(d->label); |
2849a165 | 77 | pci_mfree(d->phy_slot); |
727ce158 MM |
78 | pci_mfree(d); |
79 | } | |
80 | ||
81 | static inline void | |
82 | pci_read_data(struct pci_dev *d, void *buf, int pos, int len) | |
83 | { | |
84 | if (pos & (len-1)) | |
85 | d->access->error("Unaligned read: pos=%02x, len=%d", pos, len); | |
3430bafe MM |
86 | if (pos + len <= d->cache_len) |
87 | memcpy(buf, d->cache + pos, len); | |
88 | else if (!d->methods->read(d, pos, buf, len)) | |
727ce158 MM |
89 | memset(buf, 0xff, len); |
90 | } | |
91 | ||
92 | byte | |
93 | pci_read_byte(struct pci_dev *d, int pos) | |
94 | { | |
95 | byte buf; | |
96 | pci_read_data(d, &buf, pos, 1); | |
97 | return buf; | |
98 | } | |
99 | ||
100 | word | |
101 | pci_read_word(struct pci_dev *d, int pos) | |
102 | { | |
103 | word buf; | |
104 | pci_read_data(d, &buf, pos, 2); | |
105 | return le16_to_cpu(buf); | |
106 | } | |
107 | ||
108 | u32 | |
109 | pci_read_long(struct pci_dev *d, int pos) | |
110 | { | |
111 | u32 buf; | |
112 | pci_read_data(d, &buf, pos, 4); | |
113 | return le32_to_cpu(buf); | |
114 | } | |
115 | ||
116 | int | |
117 | pci_read_block(struct pci_dev *d, int pos, byte *buf, int len) | |
118 | { | |
119 | return d->methods->read(d, pos, buf, len); | |
120 | } | |
121 | ||
52c81519 BH |
122 | int |
123 | pci_read_vpd(struct pci_dev *d, int pos, byte *buf, int len) | |
124 | { | |
125 | return d->methods->read_vpd ? d->methods->read_vpd(d, pos, buf, len) : 0; | |
126 | } | |
127 | ||
727ce158 MM |
128 | static inline int |
129 | pci_write_data(struct pci_dev *d, void *buf, int pos, int len) | |
130 | { | |
131 | if (pos & (len-1)) | |
132 | d->access->error("Unaligned write: pos=%02x,len=%d", pos, len); | |
3430bafe MM |
133 | if (pos + len <= d->cache_len) |
134 | memcpy(d->cache + pos, buf, len); | |
727ce158 MM |
135 | return d->methods->write(d, pos, buf, len); |
136 | } | |
137 | ||
138 | int | |
139 | pci_write_byte(struct pci_dev *d, int pos, byte data) | |
140 | { | |
141 | return pci_write_data(d, &data, pos, 1); | |
142 | } | |
143 | ||
144 | int | |
145 | pci_write_word(struct pci_dev *d, int pos, word data) | |
146 | { | |
147 | word buf = cpu_to_le16(data); | |
148 | return pci_write_data(d, &buf, pos, 2); | |
149 | } | |
150 | ||
151 | int | |
152 | pci_write_long(struct pci_dev *d, int pos, u32 data) | |
153 | { | |
154 | u32 buf = cpu_to_le32(data); | |
155 | return pci_write_data(d, &buf, pos, 4); | |
156 | } | |
157 | ||
158 | int | |
159 | pci_write_block(struct pci_dev *d, int pos, byte *buf, int len) | |
160 | { | |
3430bafe MM |
161 | if (pos < d->cache_len) |
162 | { | |
163 | int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len; | |
164 | memcpy(d->cache + pos, buf, l); | |
165 | } | |
727ce158 MM |
166 | return d->methods->write(d, pos, buf, len); |
167 | } | |
168 | ||
52aecc75 | 169 | int |
558f736b | 170 | pci_fill_info_v35(struct pci_dev *d, int flags) |
727ce158 MM |
171 | { |
172 | if (flags & PCI_FILL_RESCAN) | |
173 | { | |
174 | flags &= ~PCI_FILL_RESCAN; | |
175 | d->known_fields = 0; | |
6d5e39ac | 176 | pci_free_caps(d); |
727ce158 MM |
177 | } |
178 | if (flags & ~d->known_fields) | |
e95c8373 MM |
179 | d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields); |
180 | return d->known_fields; | |
727ce158 | 181 | } |
3430bafe | 182 | |
89c51b98 | 183 | /* In version 3.1, pci_fill_info got new flags => versioned alias */ |
558f736b SS |
184 | /* In versions 3.2, 3.3, 3.4 and 3.5, the same has happened */ |
185 | STATIC_ALIAS(int pci_fill_info(struct pci_dev *d, int flags), pci_fill_info_v35(d, flags)); | |
186 | DEFINE_ALIAS(int pci_fill_info_v30(struct pci_dev *d, int flags), pci_fill_info_v35); | |
187 | DEFINE_ALIAS(int pci_fill_info_v31(struct pci_dev *d, int flags), pci_fill_info_v35); | |
188 | DEFINE_ALIAS(int pci_fill_info_v32(struct pci_dev *d, int flags), pci_fill_info_v35); | |
189 | DEFINE_ALIAS(int pci_fill_info_v33(struct pci_dev *d, int flags), pci_fill_info_v35); | |
190 | DEFINE_ALIAS(int pci_fill_info_v34(struct pci_dev *d, int flags), pci_fill_info_v35); | |
89c51b98 | 191 | SYMBOL_VERSION(pci_fill_info_v30, pci_fill_info@LIBPCI_3.0); |
dbe1e0a6 | 192 | SYMBOL_VERSION(pci_fill_info_v31, pci_fill_info@LIBPCI_3.1); |
52aecc75 | 193 | SYMBOL_VERSION(pci_fill_info_v32, pci_fill_info@LIBPCI_3.2); |
7ef7f3ec | 194 | SYMBOL_VERSION(pci_fill_info_v33, pci_fill_info@LIBPCI_3.3); |
558f736b SS |
195 | SYMBOL_VERSION(pci_fill_info_v34, pci_fill_info@LIBPCI_3.4); |
196 | SYMBOL_VERSION(pci_fill_info_v35, pci_fill_info@@LIBPCI_3.5); | |
89c51b98 | 197 | |
3430bafe MM |
198 | void |
199 | pci_setup_cache(struct pci_dev *d, byte *cache, int len) | |
200 | { | |
201 | d->cache = cache; | |
202 | d->cache_len = len; | |
203 | } |