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> |
f2d3efed | 8 | #include <asm/dmi.h> |
1da177e4 | 9 | |
cb5dd7c1 PJ |
10 | /* |
11 | * DMI stands for "Desktop Management Interface". It is part | |
12 | * of and an antecedent to, SMBIOS, which stands for System | |
13 | * Management BIOS. See further: http://www.dmtf.org/standards | |
14 | */ | |
79da4721 PW |
15 | static char dmi_empty_string[] = " "; |
16 | ||
9a22b6e7 IM |
17 | /* |
18 | * Catch too early calls to dmi_check_system(): | |
19 | */ | |
20 | static int dmi_initialized; | |
21 | ||
f3069ae9 | 22 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 23 | { |
1855256c | 24 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 25 | |
c3c7120d | 26 | if (s) { |
1da177e4 | 27 | s--; |
c3c7120d AP |
28 | while (s > 0 && *bp) { |
29 | bp += strlen(bp) + 1; | |
30 | s--; | |
31 | } | |
32 | ||
33 | if (*bp != 0) { | |
79da4721 PW |
34 | size_t len = strlen(bp)+1; |
35 | size_t cmp_len = len > 8 ? 8 : len; | |
36 | ||
37 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
38 | return dmi_empty_string; | |
f3069ae9 | 39 | return bp; |
c3c7120d | 40 | } |
4f705ae3 | 41 | } |
c3c7120d | 42 | |
f3069ae9 JD |
43 | return ""; |
44 | } | |
45 | ||
46 | static char * __init dmi_string(const struct dmi_header *dm, u8 s) | |
47 | { | |
48 | const char *bp = dmi_string_nosave(dm, s); | |
49 | char *str; | |
50 | size_t len; | |
51 | ||
52 | if (bp == dmi_empty_string) | |
53 | return dmi_empty_string; | |
54 | ||
55 | len = strlen(bp) + 1; | |
56 | str = dmi_alloc(len); | |
57 | if (str != NULL) | |
58 | strcpy(str, bp); | |
59 | else | |
60 | printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len); | |
61 | ||
c3c7120d | 62 | return str; |
1da177e4 LT |
63 | } |
64 | ||
65 | /* | |
66 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
67 | * pointing to completely the wrong place for example | |
68 | */ | |
7fce084a | 69 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
70 | void (*decode)(const struct dmi_header *, void *), |
71 | void *private_data) | |
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) |
e7a19c56 | 92 | decode(dm, private_data); |
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 | ||
e7a19c56 JD |
102 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
103 | void *)) | |
7fce084a JD |
104 | { |
105 | u8 *buf; | |
106 | ||
107 | buf = dmi_ioremap(dmi_base, dmi_len); | |
108 | if (buf == NULL) | |
109 | return -1; | |
110 | ||
e7a19c56 | 111 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a JD |
112 | |
113 | dmi_iounmap(buf, dmi_len); | |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | ||
1855256c | 117 | static int __init dmi_checksum(const u8 *buf) |
1da177e4 | 118 | { |
1249c513 | 119 | u8 sum = 0; |
1da177e4 | 120 | int a; |
4f705ae3 | 121 | |
1249c513 AP |
122 | for (a = 0; a < 15; a++) |
123 | sum += buf[a]; | |
124 | ||
125 | return sum == 0; | |
1da177e4 LT |
126 | } |
127 | ||
1da177e4 | 128 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 129 | static LIST_HEAD(dmi_devices); |
4f5c791a | 130 | int dmi_available; |
1da177e4 LT |
131 | |
132 | /* | |
133 | * Save a DMI string | |
134 | */ | |
1855256c | 135 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string) |
1da177e4 | 136 | { |
1855256c JG |
137 | const char *d = (const char*) dm; |
138 | char *p; | |
1249c513 | 139 | |
1da177e4 LT |
140 | if (dmi_ident[slot]) |
141 | return; | |
1249c513 | 142 | |
c3c7120d AP |
143 | p = dmi_string(dm, d[string]); |
144 | if (p == NULL) | |
145 | return; | |
146 | ||
147 | dmi_ident[slot] = p; | |
1da177e4 LT |
148 | } |
149 | ||
1855256c | 150 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 151 | { |
1855256c | 152 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
153 | char *s; |
154 | int is_ff = 1, is_00 = 1, i; | |
155 | ||
156 | if (dmi_ident[slot]) | |
157 | return; | |
158 | ||
159 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
160 | if(d[i] != 0x00) is_ff = 0; | |
161 | if(d[i] != 0xFF) is_00 = 0; | |
162 | } | |
163 | ||
164 | if (is_ff || is_00) | |
165 | return; | |
166 | ||
167 | s = dmi_alloc(16*2+4+1); | |
168 | if (!s) | |
169 | return; | |
170 | ||
bc058f65 | 171 | sprintf(s, "%pUB", d); |
4f5c791a LP |
172 | |
173 | dmi_ident[slot] = s; | |
174 | } | |
175 | ||
1855256c | 176 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 177 | { |
1855256c | 178 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
179 | char *s; |
180 | ||
181 | if (dmi_ident[slot]) | |
182 | return; | |
183 | ||
184 | s = dmi_alloc(4); | |
185 | if (!s) | |
186 | return; | |
187 | ||
188 | sprintf(s, "%u", *d & 0x7F); | |
189 | dmi_ident[slot] = s; | |
190 | } | |
191 | ||
f3069ae9 JD |
192 | static void __init dmi_save_one_device(int type, const char *name) |
193 | { | |
194 | struct dmi_device *dev; | |
195 | ||
196 | /* No duplicate device */ | |
197 | if (dmi_find_device(type, name, NULL)) | |
198 | return; | |
199 | ||
200 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
201 | if (!dev) { | |
202 | printk(KERN_ERR "dmi_save_one_device: out of memory.\n"); | |
203 | return; | |
204 | } | |
205 | ||
206 | dev->type = type; | |
207 | strcpy((char *)(dev + 1), name); | |
208 | dev->name = (char *)(dev + 1); | |
209 | dev->device_data = NULL; | |
210 | list_add(&dev->list, &dmi_devices); | |
211 | } | |
212 | ||
1855256c | 213 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
214 | { |
215 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
216 | |
217 | for (i = 0; i < count; i++) { | |
1855256c | 218 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
219 | |
220 | /* Skip disabled device */ | |
221 | if ((*d & 0x80) == 0) | |
222 | continue; | |
223 | ||
f3069ae9 | 224 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
225 | } |
226 | } | |
227 | ||
1855256c | 228 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
229 | { |
230 | int i, count = *(u8 *)(dm + 1); | |
231 | struct dmi_device *dev; | |
232 | ||
233 | for (i = 1; i <= count; i++) { | |
79da4721 PW |
234 | char *devname = dmi_string(dm, i); |
235 | ||
43fe105a | 236 | if (devname == dmi_empty_string) |
79da4721 | 237 | continue; |
79da4721 | 238 | |
2e0c1f6c SM |
239 | dev = dmi_alloc(sizeof(*dev)); |
240 | if (!dev) { | |
241 | printk(KERN_ERR | |
242 | "dmi_save_oem_strings_devices: out of memory.\n"); | |
243 | break; | |
244 | } | |
245 | ||
246 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 247 | dev->name = devname; |
2e0c1f6c | 248 | dev->device_data = NULL; |
ebad6a42 AP |
249 | |
250 | list_add(&dev->list, &dmi_devices); | |
251 | } | |
252 | } | |
253 | ||
1855256c | 254 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
255 | { |
256 | struct dmi_device *dev; | |
257 | void * data; | |
258 | ||
e9928674 | 259 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
260 | if (data == NULL) { |
261 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
262 | return; | |
263 | } | |
264 | ||
265 | memcpy(data, dm, dm->length); | |
266 | ||
e9928674 | 267 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
268 | if (!dev) { |
269 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
270 | return; | |
271 | } | |
272 | ||
273 | dev->type = DMI_DEV_TYPE_IPMI; | |
274 | dev->name = "IPMI controller"; | |
275 | dev->device_data = data; | |
276 | ||
abd24df8 | 277 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
278 | } |
279 | ||
911e1c9b N |
280 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
281 | int devfn, const char *name) | |
282 | { | |
283 | struct dmi_dev_onboard *onboard_dev; | |
284 | ||
285 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
286 | if (!onboard_dev) { | |
287 | printk(KERN_ERR "dmi_save_dev_onboard: out of memory.\n"); | |
288 | return; | |
289 | } | |
290 | onboard_dev->instance = instance; | |
291 | onboard_dev->segment = segment; | |
292 | onboard_dev->bus = bus; | |
293 | onboard_dev->devfn = devfn; | |
294 | ||
295 | strcpy((char *)&onboard_dev[1], name); | |
296 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
297 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
298 | onboard_dev->dev.device_data = onboard_dev; | |
299 | ||
300 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
301 | } | |
302 | ||
b4bd7d59 WVS |
303 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
304 | { | |
305 | const u8 *d = (u8*) dm + 5; | |
b4bd7d59 WVS |
306 | |
307 | /* Skip disabled device */ | |
308 | if ((*d & 0x80) == 0) | |
309 | return; | |
310 | ||
911e1c9b N |
311 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
312 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 313 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
314 | } |
315 | ||
1da177e4 LT |
316 | /* |
317 | * Process a DMI table entry. Right now all we care about are the BIOS | |
318 | * and machine entries. For 2.5 we should pull the smbus controller info | |
319 | * out of here. | |
320 | */ | |
e7a19c56 | 321 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 322 | { |
1249c513 | 323 | switch(dm->type) { |
ebad6a42 | 324 | case 0: /* BIOS Information */ |
1249c513 | 325 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 326 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
327 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
328 | break; | |
ebad6a42 | 329 | case 1: /* System Information */ |
1249c513 | 330 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 331 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 332 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 333 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 334 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 335 | break; |
ebad6a42 | 336 | case 2: /* Base Board Information */ |
1249c513 | 337 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 338 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 339 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
340 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
341 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
342 | break; | |
343 | case 3: /* Chassis Information */ | |
344 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
345 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
346 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
347 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
348 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 349 | break; |
ebad6a42 AP |
350 | case 10: /* Onboard Devices Information */ |
351 | dmi_save_devices(dm); | |
352 | break; | |
2e0c1f6c SM |
353 | case 11: /* OEM Strings */ |
354 | dmi_save_oem_strings_devices(dm); | |
355 | break; | |
ebad6a42 AP |
356 | case 38: /* IPMI Device Information */ |
357 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
358 | break; |
359 | case 41: /* Onboard Devices Extended Information */ | |
360 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
361 | } |
362 | } | |
363 | ||
1855256c | 364 | static int __init dmi_present(const char __iomem *p) |
1da177e4 | 365 | { |
61e032fa | 366 | u8 buf[15]; |
1855256c | 367 | |
3ed3bce8 MD |
368 | memcpy_fromio(buf, p, 15); |
369 | if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { | |
7fce084a JD |
370 | dmi_num = (buf[13] << 8) | buf[12]; |
371 | dmi_len = (buf[7] << 8) | buf[6]; | |
372 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 373 | (buf[9] << 8) | buf[8]; |
61e032fa | 374 | |
3ed3bce8 MD |
375 | /* |
376 | * DMI version 0.0 means that the real version is taken from | |
377 | * the SMBIOS version, which we don't know at this point. | |
378 | */ | |
379 | if (buf[14] != 0) | |
380 | printk(KERN_INFO "DMI %d.%d present.\n", | |
381 | buf[14] >> 4, buf[14] & 0xF); | |
382 | else | |
383 | printk(KERN_INFO "DMI present.\n"); | |
7fce084a | 384 | if (dmi_walk_early(dmi_decode) == 0) |
3ed3bce8 MD |
385 | return 0; |
386 | } | |
387 | return 1; | |
388 | } | |
61e032fa | 389 | |
3ed3bce8 MD |
390 | void __init dmi_scan_machine(void) |
391 | { | |
392 | char __iomem *p, *q; | |
393 | int rc; | |
394 | ||
395 | if (efi_enabled) { | |
b2c99e3c | 396 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 397 | goto error; |
3ed3bce8 | 398 | |
4f5c791a LP |
399 | /* This is called as a core_initcall() because it isn't |
400 | * needed during early boot. This also means we can | |
401 | * iounmap the space when we're done with it. | |
402 | */ | |
b2c99e3c | 403 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 404 | if (p == NULL) |
9a22b6e7 | 405 | goto error; |
3ed3bce8 MD |
406 | |
407 | rc = dmi_present(p + 0x10); /* offset of _DMI_ string */ | |
23dd842c | 408 | dmi_iounmap(p, 32); |
4f5c791a LP |
409 | if (!rc) { |
410 | dmi_available = 1; | |
9a22b6e7 | 411 | goto out; |
4f5c791a | 412 | } |
3ed3bce8 MD |
413 | } |
414 | else { | |
415 | /* | |
416 | * no iounmap() for that ioremap(); it would be a no-op, but | |
417 | * it's so early in setup that sucker gets confused into doing | |
418 | * what it shouldn't if we actually call it. | |
419 | */ | |
420 | p = dmi_ioremap(0xF0000, 0x10000); | |
421 | if (p == NULL) | |
9a22b6e7 | 422 | goto error; |
3ed3bce8 MD |
423 | |
424 | for (q = p; q < p + 0x10000; q += 16) { | |
425 | rc = dmi_present(q); | |
4f5c791a LP |
426 | if (!rc) { |
427 | dmi_available = 1; | |
0d64484f | 428 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 429 | goto out; |
4f5c791a | 430 | } |
61e032fa | 431 | } |
3212bff3 | 432 | dmi_iounmap(p, 0x10000); |
61e032fa | 433 | } |
9a22b6e7 IM |
434 | error: |
435 | printk(KERN_INFO "DMI not present or invalid.\n"); | |
436 | out: | |
437 | dmi_initialized = 1; | |
1da177e4 LT |
438 | } |
439 | ||
d7b1956f RW |
440 | /** |
441 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
442 | * @dmi: pointer to the dmi_system_id structure to check | |
443 | */ | |
444 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
445 | { | |
446 | int i; | |
447 | ||
448 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
449 | ||
450 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
451 | int s = dmi->matches[i].slot; | |
452 | if (s == DMI_NONE) | |
75757507 | 453 | break; |
d7b1956f RW |
454 | if (dmi_ident[s] |
455 | && strstr(dmi_ident[s], dmi->matches[i].substr)) | |
456 | continue; | |
457 | /* No match */ | |
458 | return false; | |
459 | } | |
460 | return true; | |
461 | } | |
462 | ||
75757507 DT |
463 | /** |
464 | * dmi_is_end_of_table - check for end-of-table marker | |
465 | * @dmi: pointer to the dmi_system_id structure to check | |
466 | */ | |
467 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
468 | { | |
469 | return dmi->matches[0].slot == DMI_NONE; | |
470 | } | |
471 | ||
1da177e4 LT |
472 | /** |
473 | * dmi_check_system - check system DMI data | |
474 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
475 | * All non-null elements of the list must match |
476 | * their slot's (field index's) data (i.e., each | |
477 | * list string must be a substring of the specified | |
478 | * DMI slot's string data) to be considered a | |
479 | * successful match. | |
1da177e4 LT |
480 | * |
481 | * Walk the blacklist table running matching functions until someone | |
482 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 483 | * each successful match. Returns the number of matches. |
1da177e4 | 484 | */ |
1855256c | 485 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 486 | { |
d7b1956f RW |
487 | int count = 0; |
488 | const struct dmi_system_id *d; | |
489 | ||
75757507 | 490 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
491 | if (dmi_matches(d)) { |
492 | count++; | |
493 | if (d->callback && d->callback(d)) | |
494 | break; | |
1da177e4 | 495 | } |
1da177e4 LT |
496 | |
497 | return count; | |
498 | } | |
1da177e4 LT |
499 | EXPORT_SYMBOL(dmi_check_system); |
500 | ||
d7b1956f RW |
501 | /** |
502 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
503 | * @list: array of dmi_system_id structures to match against | |
504 | * All non-null elements of the list must match | |
505 | * their slot's (field index's) data (i.e., each | |
506 | * list string must be a substring of the specified | |
507 | * DMI slot's string data) to be considered a | |
508 | * successful match. | |
509 | * | |
510 | * Walk the blacklist table until the first match is found. Return the | |
511 | * pointer to the matching entry or NULL if there's no match. | |
512 | */ | |
513 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
514 | { | |
515 | const struct dmi_system_id *d; | |
516 | ||
75757507 | 517 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
518 | if (dmi_matches(d)) |
519 | return d; | |
520 | ||
521 | return NULL; | |
522 | } | |
523 | EXPORT_SYMBOL(dmi_first_match); | |
524 | ||
1da177e4 LT |
525 | /** |
526 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 527 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
528 | * |
529 | * Returns one DMI data value, can be used to perform | |
530 | * complex DMI data checks. | |
531 | */ | |
1855256c | 532 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
533 | { |
534 | return dmi_ident[field]; | |
535 | } | |
e70c9d5e | 536 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 537 | |
fd8cd7e1 | 538 | /** |
c2bacfc4 RD |
539 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
540 | * @str: string to check for | |
fd8cd7e1 AK |
541 | */ |
542 | int dmi_name_in_serial(const char *str) | |
543 | { | |
544 | int f = DMI_PRODUCT_SERIAL; | |
545 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
546 | return 1; | |
547 | return 0; | |
548 | } | |
a1bae672 AK |
549 | |
550 | /** | |
551 | * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information. | |
552 | * @str: Case sensitive Name | |
553 | */ | |
1855256c | 554 | int dmi_name_in_vendors(const char *str) |
a1bae672 AK |
555 | { |
556 | static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR, | |
557 | DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR, | |
558 | DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE }; | |
559 | int i; | |
560 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
561 | int f = fields[i]; | |
562 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
563 | return 1; | |
564 | } | |
565 | return 0; | |
566 | } | |
567 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
568 | ||
ebad6a42 AP |
569 | /** |
570 | * dmi_find_device - find onboard device by type/name | |
571 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 572 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
573 | * @from: previous device found in search, or %NULL for new search. |
574 | * | |
575 | * Iterates through the list of known onboard devices. If a device is | |
576 | * found with a matching @vendor and @device, a pointer to its device | |
577 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 578 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
579 | * If @from is not %NULL, searches continue from next device. |
580 | */ | |
1855256c JG |
581 | const struct dmi_device * dmi_find_device(int type, const char *name, |
582 | const struct dmi_device *from) | |
ebad6a42 | 583 | { |
1855256c JG |
584 | const struct list_head *head = from ? &from->list : &dmi_devices; |
585 | struct list_head *d; | |
ebad6a42 AP |
586 | |
587 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
1855256c JG |
588 | const struct dmi_device *dev = |
589 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
590 | |
591 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
592 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
593 | return dev; | |
594 | } | |
595 | ||
596 | return NULL; | |
597 | } | |
598 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
599 | |
600 | /** | |
3e5cd1f2 TH |
601 | * dmi_get_date - parse a DMI date |
602 | * @field: data index (see enum dmi_field) | |
603 | * @yearp: optional out parameter for the year | |
604 | * @monthp: optional out parameter for the month | |
605 | * @dayp: optional out parameter for the day | |
f083a329 | 606 | * |
3e5cd1f2 TH |
607 | * The date field is assumed to be in the form resembling |
608 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
609 | * parameters any or all of which can be omitted. | |
610 | * | |
611 | * If the field doesn't exist, all out parameters are set to zero | |
612 | * and false is returned. Otherwise, true is returned with any | |
613 | * invalid part of date set to zero. | |
614 | * | |
615 | * On return, year, month and day are guaranteed to be in the | |
616 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 617 | */ |
3e5cd1f2 | 618 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 619 | { |
3e5cd1f2 TH |
620 | int year = 0, month = 0, day = 0; |
621 | bool exists; | |
622 | const char *s, *y; | |
02c24fa8 | 623 | char *e; |
f083a329 | 624 | |
3e5cd1f2 TH |
625 | s = dmi_get_system_info(field); |
626 | exists = s; | |
627 | if (!exists) | |
628 | goto out; | |
f083a329 | 629 | |
3e5cd1f2 TH |
630 | /* |
631 | * Determine year first. We assume the date string resembles | |
632 | * mm/dd/yy[yy] but the original code extracted only the year | |
633 | * from the end. Keep the behavior in the spirit of no | |
634 | * surprises. | |
635 | */ | |
636 | y = strrchr(s, '/'); | |
637 | if (!y) | |
638 | goto out; | |
639 | ||
640 | y++; | |
641 | year = simple_strtoul(y, &e, 10); | |
642 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
643 | year += 1900; |
644 | if (year < 1996) /* no dates < spec 1.0 */ | |
645 | year += 100; | |
646 | } | |
3e5cd1f2 TH |
647 | if (year > 9999) /* year should fit in %04d */ |
648 | year = 0; | |
649 | ||
650 | /* parse the mm and dd */ | |
651 | month = simple_strtoul(s, &e, 10); | |
652 | if (s == e || *e != '/' || !month || month > 12) { | |
653 | month = 0; | |
654 | goto out; | |
655 | } | |
f083a329 | 656 | |
3e5cd1f2 TH |
657 | s = e + 1; |
658 | day = simple_strtoul(s, &e, 10); | |
659 | if (s == y || s == e || *e != '/' || day > 31) | |
660 | day = 0; | |
661 | out: | |
662 | if (yearp) | |
663 | *yearp = year; | |
664 | if (monthp) | |
665 | *monthp = month; | |
666 | if (dayp) | |
667 | *dayp = day; | |
668 | return exists; | |
f083a329 | 669 | } |
3e5cd1f2 | 670 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
671 | |
672 | /** | |
673 | * dmi_walk - Walk the DMI table and get called back for every record | |
674 | * @decode: Callback function | |
e7a19c56 | 675 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
676 | * |
677 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
678 | */ | |
e7a19c56 JD |
679 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
680 | void *private_data) | |
7fce084a JD |
681 | { |
682 | u8 *buf; | |
683 | ||
684 | if (!dmi_available) | |
685 | return -1; | |
686 | ||
687 | buf = ioremap(dmi_base, dmi_len); | |
688 | if (buf == NULL) | |
689 | return -1; | |
690 | ||
e7a19c56 | 691 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a JD |
692 | |
693 | iounmap(buf); | |
694 | return 0; | |
695 | } | |
696 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
697 | |
698 | /** | |
699 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
700 | * @f: DMI field identifier |
701 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
702 | * |
703 | * Returns true if the requested field equals to the str (including NULL). | |
704 | */ | |
705 | bool dmi_match(enum dmi_field f, const char *str) | |
706 | { | |
707 | const char *info = dmi_get_system_info(f); | |
708 | ||
709 | if (info == NULL || str == NULL) | |
710 | return info == str; | |
711 | ||
712 | return !strcmp(info, str); | |
713 | } | |
714 | EXPORT_SYMBOL_GPL(dmi_match); |