Commit | Line | Data |
---|---|---|
1da177e4 | 1 | #include <linux/types.h> |
1da177e4 LT |
2 | #include <linux/string.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/module.h> | |
1da177e4 | 5 | #include <linux/dmi.h> |
3ed3bce8 | 6 | #include <linux/efi.h> |
1da177e4 | 7 | #include <linux/bootmem.h> |
e9928674 | 8 | #include <linux/slab.h> |
f2d3efed | 9 | #include <asm/dmi.h> |
1da177e4 | 10 | |
cb5dd7c1 PJ |
11 | /* |
12 | * DMI stands for "Desktop Management Interface". It is part | |
13 | * of and an antecedent to, SMBIOS, which stands for System | |
14 | * Management BIOS. See further: http://www.dmtf.org/standards | |
15 | */ | |
79da4721 PW |
16 | static char dmi_empty_string[] = " "; |
17 | ||
9a22b6e7 IM |
18 | /* |
19 | * Catch too early calls to dmi_check_system(): | |
20 | */ | |
21 | static int dmi_initialized; | |
22 | ||
f3069ae9 | 23 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 24 | { |
1855256c | 25 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 26 | |
c3c7120d | 27 | if (s) { |
1da177e4 | 28 | s--; |
c3c7120d AP |
29 | while (s > 0 && *bp) { |
30 | bp += strlen(bp) + 1; | |
31 | s--; | |
32 | } | |
33 | ||
34 | if (*bp != 0) { | |
79da4721 PW |
35 | size_t len = strlen(bp)+1; |
36 | size_t cmp_len = len > 8 ? 8 : len; | |
37 | ||
38 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
39 | return dmi_empty_string; | |
f3069ae9 | 40 | return bp; |
c3c7120d | 41 | } |
4f705ae3 | 42 | } |
c3c7120d | 43 | |
f3069ae9 JD |
44 | return ""; |
45 | } | |
46 | ||
47 | static char * __init dmi_string(const struct dmi_header *dm, u8 s) | |
48 | { | |
49 | const char *bp = dmi_string_nosave(dm, s); | |
50 | char *str; | |
51 | size_t len; | |
52 | ||
53 | if (bp == dmi_empty_string) | |
54 | return dmi_empty_string; | |
55 | ||
56 | len = strlen(bp) + 1; | |
57 | str = dmi_alloc(len); | |
58 | if (str != NULL) | |
59 | strcpy(str, bp); | |
60 | else | |
61 | printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len); | |
62 | ||
c3c7120d | 63 | return str; |
1da177e4 LT |
64 | } |
65 | ||
66 | /* | |
67 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
68 | * pointing to completely the wrong place for example | |
69 | */ | |
7fce084a JD |
70 | static void dmi_table(u8 *buf, int len, int num, |
71 | void (*decode)(const struct dmi_header *)) | |
1da177e4 | 72 | { |
7fce084a | 73 | u8 *data = buf; |
1249c513 | 74 | int i = 0; |
4f705ae3 | 75 | |
1da177e4 | 76 | /* |
4f705ae3 BH |
77 | * Stop when we see all the items the table claimed to have |
78 | * OR we run off the end of the table (also happens) | |
79 | */ | |
1249c513 | 80 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
81 | const struct dmi_header *dm = (const struct dmi_header *)data; |
82 | ||
1da177e4 | 83 | /* |
8638545c AC |
84 | * We want to know the total length (formatted area and |
85 | * strings) before decoding to make sure we won't run off the | |
86 | * table in dmi_decode or dmi_string | |
1da177e4 | 87 | */ |
1249c513 AP |
88 | data += dm->length; |
89 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 90 | data++; |
1249c513 | 91 | if (data - buf < len - 1) |
1da177e4 | 92 | decode(dm); |
1249c513 | 93 | data += 2; |
1da177e4 LT |
94 | i++; |
95 | } | |
7fce084a JD |
96 | } |
97 | ||
98 | static u32 dmi_base; | |
99 | static u16 dmi_len; | |
100 | static u16 dmi_num; | |
101 | ||
102 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *)) | |
103 | { | |
104 | u8 *buf; | |
105 | ||
106 | buf = dmi_ioremap(dmi_base, dmi_len); | |
107 | if (buf == NULL) | |
108 | return -1; | |
109 | ||
110 | dmi_table(buf, dmi_len, dmi_num, decode); | |
111 | ||
112 | dmi_iounmap(buf, dmi_len); | |
1da177e4 LT |
113 | return 0; |
114 | } | |
115 | ||
1855256c | 116 | static int __init dmi_checksum(const u8 *buf) |
1da177e4 | 117 | { |
1249c513 | 118 | u8 sum = 0; |
1da177e4 | 119 | int a; |
4f705ae3 | 120 | |
1249c513 AP |
121 | for (a = 0; a < 15; a++) |
122 | sum += buf[a]; | |
123 | ||
124 | return sum == 0; | |
1da177e4 LT |
125 | } |
126 | ||
1da177e4 | 127 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 128 | static LIST_HEAD(dmi_devices); |
4f5c791a | 129 | int dmi_available; |
1da177e4 LT |
130 | |
131 | /* | |
132 | * Save a DMI string | |
133 | */ | |
1855256c | 134 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string) |
1da177e4 | 135 | { |
1855256c JG |
136 | const char *d = (const char*) dm; |
137 | char *p; | |
1249c513 | 138 | |
1da177e4 LT |
139 | if (dmi_ident[slot]) |
140 | return; | |
1249c513 | 141 | |
c3c7120d AP |
142 | p = dmi_string(dm, d[string]); |
143 | if (p == NULL) | |
144 | return; | |
145 | ||
146 | dmi_ident[slot] = p; | |
1da177e4 LT |
147 | } |
148 | ||
1855256c | 149 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 150 | { |
1855256c | 151 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
152 | char *s; |
153 | int is_ff = 1, is_00 = 1, i; | |
154 | ||
155 | if (dmi_ident[slot]) | |
156 | return; | |
157 | ||
158 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
159 | if(d[i] != 0x00) is_ff = 0; | |
160 | if(d[i] != 0xFF) is_00 = 0; | |
161 | } | |
162 | ||
163 | if (is_ff || is_00) | |
164 | return; | |
165 | ||
166 | s = dmi_alloc(16*2+4+1); | |
167 | if (!s) | |
168 | return; | |
169 | ||
170 | sprintf(s, | |
171 | "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", | |
172 | d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], | |
173 | d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]); | |
174 | ||
175 | dmi_ident[slot] = s; | |
176 | } | |
177 | ||
1855256c | 178 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 179 | { |
1855256c | 180 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
181 | char *s; |
182 | ||
183 | if (dmi_ident[slot]) | |
184 | return; | |
185 | ||
186 | s = dmi_alloc(4); | |
187 | if (!s) | |
188 | return; | |
189 | ||
190 | sprintf(s, "%u", *d & 0x7F); | |
191 | dmi_ident[slot] = s; | |
192 | } | |
193 | ||
f3069ae9 JD |
194 | static void __init dmi_save_one_device(int type, const char *name) |
195 | { | |
196 | struct dmi_device *dev; | |
197 | ||
198 | /* No duplicate device */ | |
199 | if (dmi_find_device(type, name, NULL)) | |
200 | return; | |
201 | ||
202 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
203 | if (!dev) { | |
204 | printk(KERN_ERR "dmi_save_one_device: out of memory.\n"); | |
205 | return; | |
206 | } | |
207 | ||
208 | dev->type = type; | |
209 | strcpy((char *)(dev + 1), name); | |
210 | dev->name = (char *)(dev + 1); | |
211 | dev->device_data = NULL; | |
212 | list_add(&dev->list, &dmi_devices); | |
213 | } | |
214 | ||
1855256c | 215 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
216 | { |
217 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
218 | |
219 | for (i = 0; i < count; i++) { | |
1855256c | 220 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
221 | |
222 | /* Skip disabled device */ | |
223 | if ((*d & 0x80) == 0) | |
224 | continue; | |
225 | ||
f3069ae9 | 226 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
227 | } |
228 | } | |
229 | ||
1855256c | 230 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
231 | { |
232 | int i, count = *(u8 *)(dm + 1); | |
233 | struct dmi_device *dev; | |
234 | ||
235 | for (i = 1; i <= count; i++) { | |
79da4721 PW |
236 | char *devname = dmi_string(dm, i); |
237 | ||
43fe105a | 238 | if (devname == dmi_empty_string) |
79da4721 | 239 | continue; |
79da4721 | 240 | |
2e0c1f6c SM |
241 | dev = dmi_alloc(sizeof(*dev)); |
242 | if (!dev) { | |
243 | printk(KERN_ERR | |
244 | "dmi_save_oem_strings_devices: out of memory.\n"); | |
245 | break; | |
246 | } | |
247 | ||
248 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 249 | dev->name = devname; |
2e0c1f6c | 250 | dev->device_data = NULL; |
ebad6a42 AP |
251 | |
252 | list_add(&dev->list, &dmi_devices); | |
253 | } | |
254 | } | |
255 | ||
1855256c | 256 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
257 | { |
258 | struct dmi_device *dev; | |
259 | void * data; | |
260 | ||
e9928674 | 261 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
262 | if (data == NULL) { |
263 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
264 | return; | |
265 | } | |
266 | ||
267 | memcpy(data, dm, dm->length); | |
268 | ||
e9928674 | 269 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
270 | if (!dev) { |
271 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
272 | return; | |
273 | } | |
274 | ||
275 | dev->type = DMI_DEV_TYPE_IPMI; | |
276 | dev->name = "IPMI controller"; | |
277 | dev->device_data = data; | |
278 | ||
abd24df8 | 279 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
280 | } |
281 | ||
b4bd7d59 WVS |
282 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
283 | { | |
284 | const u8 *d = (u8*) dm + 5; | |
b4bd7d59 WVS |
285 | |
286 | /* Skip disabled device */ | |
287 | if ((*d & 0x80) == 0) | |
288 | return; | |
289 | ||
f3069ae9 | 290 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
291 | } |
292 | ||
1da177e4 LT |
293 | /* |
294 | * Process a DMI table entry. Right now all we care about are the BIOS | |
295 | * and machine entries. For 2.5 we should pull the smbus controller info | |
296 | * out of here. | |
297 | */ | |
1855256c | 298 | static void __init dmi_decode(const struct dmi_header *dm) |
1da177e4 | 299 | { |
1249c513 | 300 | switch(dm->type) { |
ebad6a42 | 301 | case 0: /* BIOS Information */ |
1249c513 | 302 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 303 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
304 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
305 | break; | |
ebad6a42 | 306 | case 1: /* System Information */ |
1249c513 | 307 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 308 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 309 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 310 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 311 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 312 | break; |
ebad6a42 | 313 | case 2: /* Base Board Information */ |
1249c513 | 314 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 315 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 316 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
317 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
318 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
319 | break; | |
320 | case 3: /* Chassis Information */ | |
321 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
322 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
323 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
324 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
325 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 326 | break; |
ebad6a42 AP |
327 | case 10: /* Onboard Devices Information */ |
328 | dmi_save_devices(dm); | |
329 | break; | |
2e0c1f6c SM |
330 | case 11: /* OEM Strings */ |
331 | dmi_save_oem_strings_devices(dm); | |
332 | break; | |
ebad6a42 AP |
333 | case 38: /* IPMI Device Information */ |
334 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
335 | break; |
336 | case 41: /* Onboard Devices Extended Information */ | |
337 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
338 | } |
339 | } | |
340 | ||
1855256c | 341 | static int __init dmi_present(const char __iomem *p) |
1da177e4 | 342 | { |
61e032fa | 343 | u8 buf[15]; |
1855256c | 344 | |
3ed3bce8 MD |
345 | memcpy_fromio(buf, p, 15); |
346 | if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { | |
7fce084a JD |
347 | dmi_num = (buf[13] << 8) | buf[12]; |
348 | dmi_len = (buf[7] << 8) | buf[6]; | |
349 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 350 | (buf[9] << 8) | buf[8]; |
61e032fa | 351 | |
3ed3bce8 MD |
352 | /* |
353 | * DMI version 0.0 means that the real version is taken from | |
354 | * the SMBIOS version, which we don't know at this point. | |
355 | */ | |
356 | if (buf[14] != 0) | |
357 | printk(KERN_INFO "DMI %d.%d present.\n", | |
358 | buf[14] >> 4, buf[14] & 0xF); | |
359 | else | |
360 | printk(KERN_INFO "DMI present.\n"); | |
7fce084a | 361 | if (dmi_walk_early(dmi_decode) == 0) |
3ed3bce8 MD |
362 | return 0; |
363 | } | |
364 | return 1; | |
365 | } | |
61e032fa | 366 | |
3ed3bce8 MD |
367 | void __init dmi_scan_machine(void) |
368 | { | |
369 | char __iomem *p, *q; | |
370 | int rc; | |
371 | ||
372 | if (efi_enabled) { | |
b2c99e3c | 373 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 374 | goto error; |
3ed3bce8 | 375 | |
4f5c791a LP |
376 | /* This is called as a core_initcall() because it isn't |
377 | * needed during early boot. This also means we can | |
378 | * iounmap the space when we're done with it. | |
379 | */ | |
b2c99e3c | 380 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 381 | if (p == NULL) |
9a22b6e7 | 382 | goto error; |
3ed3bce8 MD |
383 | |
384 | rc = dmi_present(p + 0x10); /* offset of _DMI_ string */ | |
23dd842c | 385 | dmi_iounmap(p, 32); |
4f5c791a LP |
386 | if (!rc) { |
387 | dmi_available = 1; | |
9a22b6e7 | 388 | goto out; |
4f5c791a | 389 | } |
3ed3bce8 MD |
390 | } |
391 | else { | |
392 | /* | |
393 | * no iounmap() for that ioremap(); it would be a no-op, but | |
394 | * it's so early in setup that sucker gets confused into doing | |
395 | * what it shouldn't if we actually call it. | |
396 | */ | |
397 | p = dmi_ioremap(0xF0000, 0x10000); | |
398 | if (p == NULL) | |
9a22b6e7 | 399 | goto error; |
3ed3bce8 MD |
400 | |
401 | for (q = p; q < p + 0x10000; q += 16) { | |
402 | rc = dmi_present(q); | |
4f5c791a LP |
403 | if (!rc) { |
404 | dmi_available = 1; | |
0d64484f | 405 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 406 | goto out; |
4f5c791a | 407 | } |
61e032fa | 408 | } |
3212bff3 | 409 | dmi_iounmap(p, 0x10000); |
61e032fa | 410 | } |
9a22b6e7 IM |
411 | error: |
412 | printk(KERN_INFO "DMI not present or invalid.\n"); | |
413 | out: | |
414 | dmi_initialized = 1; | |
1da177e4 LT |
415 | } |
416 | ||
d7b1956f RW |
417 | /** |
418 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
419 | * @dmi: pointer to the dmi_system_id structure to check | |
420 | */ | |
421 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
422 | { | |
423 | int i; | |
424 | ||
425 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
426 | ||
427 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
428 | int s = dmi->matches[i].slot; | |
429 | if (s == DMI_NONE) | |
430 | continue; | |
431 | if (dmi_ident[s] | |
432 | && strstr(dmi_ident[s], dmi->matches[i].substr)) | |
433 | continue; | |
434 | /* No match */ | |
435 | return false; | |
436 | } | |
437 | return true; | |
438 | } | |
439 | ||
1da177e4 LT |
440 | /** |
441 | * dmi_check_system - check system DMI data | |
442 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
443 | * All non-null elements of the list must match |
444 | * their slot's (field index's) data (i.e., each | |
445 | * list string must be a substring of the specified | |
446 | * DMI slot's string data) to be considered a | |
447 | * successful match. | |
1da177e4 LT |
448 | * |
449 | * Walk the blacklist table running matching functions until someone | |
450 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 451 | * each successful match. Returns the number of matches. |
1da177e4 | 452 | */ |
1855256c | 453 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 454 | { |
d7b1956f RW |
455 | int count = 0; |
456 | const struct dmi_system_id *d; | |
457 | ||
458 | for (d = list; d->ident; d++) | |
459 | if (dmi_matches(d)) { | |
460 | count++; | |
461 | if (d->callback && d->callback(d)) | |
462 | break; | |
1da177e4 | 463 | } |
1da177e4 LT |
464 | |
465 | return count; | |
466 | } | |
1da177e4 LT |
467 | EXPORT_SYMBOL(dmi_check_system); |
468 | ||
d7b1956f RW |
469 | /** |
470 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
471 | * @list: array of dmi_system_id structures to match against | |
472 | * All non-null elements of the list must match | |
473 | * their slot's (field index's) data (i.e., each | |
474 | * list string must be a substring of the specified | |
475 | * DMI slot's string data) to be considered a | |
476 | * successful match. | |
477 | * | |
478 | * Walk the blacklist table until the first match is found. Return the | |
479 | * pointer to the matching entry or NULL if there's no match. | |
480 | */ | |
481 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
482 | { | |
483 | const struct dmi_system_id *d; | |
484 | ||
485 | for (d = list; d->ident; d++) | |
486 | if (dmi_matches(d)) | |
487 | return d; | |
488 | ||
489 | return NULL; | |
490 | } | |
491 | EXPORT_SYMBOL(dmi_first_match); | |
492 | ||
1da177e4 LT |
493 | /** |
494 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 495 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
496 | * |
497 | * Returns one DMI data value, can be used to perform | |
498 | * complex DMI data checks. | |
499 | */ | |
1855256c | 500 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
501 | { |
502 | return dmi_ident[field]; | |
503 | } | |
e70c9d5e | 504 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 505 | |
fd8cd7e1 | 506 | /** |
c2bacfc4 RD |
507 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
508 | * @str: string to check for | |
fd8cd7e1 AK |
509 | */ |
510 | int dmi_name_in_serial(const char *str) | |
511 | { | |
512 | int f = DMI_PRODUCT_SERIAL; | |
513 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
514 | return 1; | |
515 | return 0; | |
516 | } | |
a1bae672 AK |
517 | |
518 | /** | |
519 | * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information. | |
520 | * @str: Case sensitive Name | |
521 | */ | |
1855256c | 522 | int dmi_name_in_vendors(const char *str) |
a1bae672 AK |
523 | { |
524 | static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR, | |
525 | DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR, | |
526 | DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE }; | |
527 | int i; | |
528 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
529 | int f = fields[i]; | |
530 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
531 | return 1; | |
532 | } | |
533 | return 0; | |
534 | } | |
535 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
536 | ||
ebad6a42 AP |
537 | /** |
538 | * dmi_find_device - find onboard device by type/name | |
539 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 540 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
541 | * @from: previous device found in search, or %NULL for new search. |
542 | * | |
543 | * Iterates through the list of known onboard devices. If a device is | |
544 | * found with a matching @vendor and @device, a pointer to its device | |
545 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 546 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
547 | * If @from is not %NULL, searches continue from next device. |
548 | */ | |
1855256c JG |
549 | const struct dmi_device * dmi_find_device(int type, const char *name, |
550 | const struct dmi_device *from) | |
ebad6a42 | 551 | { |
1855256c JG |
552 | const struct list_head *head = from ? &from->list : &dmi_devices; |
553 | struct list_head *d; | |
ebad6a42 AP |
554 | |
555 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
1855256c JG |
556 | const struct dmi_device *dev = |
557 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
558 | |
559 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
560 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
561 | return dev; | |
562 | } | |
563 | ||
564 | return NULL; | |
565 | } | |
566 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
567 | |
568 | /** | |
569 | * dmi_get_year - Return year of a DMI date | |
570 | * @field: data index (like dmi_get_system_info) | |
571 | * | |
572 | * Returns -1 when the field doesn't exist. 0 when it is broken. | |
573 | */ | |
574 | int dmi_get_year(int field) | |
575 | { | |
576 | int year; | |
1855256c | 577 | const char *s = dmi_get_system_info(field); |
f083a329 AK |
578 | |
579 | if (!s) | |
580 | return -1; | |
581 | if (*s == '\0') | |
582 | return 0; | |
583 | s = strrchr(s, '/'); | |
584 | if (!s) | |
585 | return 0; | |
586 | ||
587 | s += 1; | |
588 | year = simple_strtoul(s, NULL, 0); | |
589 | if (year && year < 100) { /* 2-digit year */ | |
590 | year += 1900; | |
591 | if (year < 1996) /* no dates < spec 1.0 */ | |
592 | year += 100; | |
593 | } | |
594 | ||
595 | return year; | |
596 | } | |
7fce084a JD |
597 | |
598 | /** | |
599 | * dmi_walk - Walk the DMI table and get called back for every record | |
600 | * @decode: Callback function | |
601 | * | |
602 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
603 | */ | |
604 | int dmi_walk(void (*decode)(const struct dmi_header *)) | |
605 | { | |
606 | u8 *buf; | |
607 | ||
608 | if (!dmi_available) | |
609 | return -1; | |
610 | ||
611 | buf = ioremap(dmi_base, dmi_len); | |
612 | if (buf == NULL) | |
613 | return -1; | |
614 | ||
615 | dmi_table(buf, dmi_len, dmi_num, decode); | |
616 | ||
617 | iounmap(buf); | |
618 | return 0; | |
619 | } | |
620 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
621 | |
622 | /** | |
623 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
624 | * @f: DMI field identifier |
625 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
626 | * |
627 | * Returns true if the requested field equals to the str (including NULL). | |
628 | */ | |
629 | bool dmi_match(enum dmi_field f, const char *str) | |
630 | { | |
631 | const char *info = dmi_get_system_info(f); | |
632 | ||
633 | if (info == NULL || str == NULL) | |
634 | return info == str; | |
635 | ||
636 | return !strcmp(info, str); | |
637 | } | |
638 | EXPORT_SYMBOL_GPL(dmi_match); |