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> | |
8881cdce | 5 | #include <linux/ctype.h> |
1da177e4 | 6 | #include <linux/dmi.h> |
3ed3bce8 | 7 | #include <linux/efi.h> |
1da177e4 | 8 | #include <linux/bootmem.h> |
d114a333 | 9 | #include <linux/random.h> |
f2d3efed | 10 | #include <asm/dmi.h> |
1da177e4 | 11 | |
cb5dd7c1 PJ |
12 | /* |
13 | * DMI stands for "Desktop Management Interface". It is part | |
14 | * of and an antecedent to, SMBIOS, which stands for System | |
15 | * Management BIOS. See further: http://www.dmtf.org/standards | |
16 | */ | |
79da4721 PW |
17 | static char dmi_empty_string[] = " "; |
18 | ||
9a22b6e7 IM |
19 | /* |
20 | * Catch too early calls to dmi_check_system(): | |
21 | */ | |
22 | static int dmi_initialized; | |
23 | ||
f3069ae9 | 24 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 25 | { |
1855256c | 26 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 27 | |
c3c7120d | 28 | if (s) { |
1da177e4 | 29 | s--; |
c3c7120d AP |
30 | while (s > 0 && *bp) { |
31 | bp += strlen(bp) + 1; | |
32 | s--; | |
33 | } | |
34 | ||
35 | if (*bp != 0) { | |
79da4721 PW |
36 | size_t len = strlen(bp)+1; |
37 | size_t cmp_len = len > 8 ? 8 : len; | |
38 | ||
39 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
40 | return dmi_empty_string; | |
f3069ae9 | 41 | return bp; |
c3c7120d | 42 | } |
4f705ae3 | 43 | } |
c3c7120d | 44 | |
f3069ae9 JD |
45 | return ""; |
46 | } | |
47 | ||
48 | static char * __init dmi_string(const struct dmi_header *dm, u8 s) | |
49 | { | |
50 | const char *bp = dmi_string_nosave(dm, s); | |
51 | char *str; | |
52 | size_t len; | |
53 | ||
54 | if (bp == dmi_empty_string) | |
55 | return dmi_empty_string; | |
56 | ||
57 | len = strlen(bp) + 1; | |
58 | str = dmi_alloc(len); | |
59 | if (str != NULL) | |
60 | strcpy(str, bp); | |
61 | else | |
62 | printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len); | |
63 | ||
c3c7120d | 64 | return str; |
1da177e4 LT |
65 | } |
66 | ||
67 | /* | |
68 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
69 | * pointing to completely the wrong place for example | |
70 | */ | |
7fce084a | 71 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
72 | void (*decode)(const struct dmi_header *, void *), |
73 | void *private_data) | |
1da177e4 | 74 | { |
7fce084a | 75 | u8 *data = buf; |
1249c513 | 76 | int i = 0; |
4f705ae3 | 77 | |
1da177e4 | 78 | /* |
4f705ae3 BH |
79 | * Stop when we see all the items the table claimed to have |
80 | * OR we run off the end of the table (also happens) | |
81 | */ | |
1249c513 | 82 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
83 | const struct dmi_header *dm = (const struct dmi_header *)data; |
84 | ||
1da177e4 | 85 | /* |
8638545c AC |
86 | * We want to know the total length (formatted area and |
87 | * strings) before decoding to make sure we won't run off the | |
88 | * table in dmi_decode or dmi_string | |
1da177e4 | 89 | */ |
1249c513 AP |
90 | data += dm->length; |
91 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 92 | data++; |
1249c513 | 93 | if (data - buf < len - 1) |
e7a19c56 | 94 | decode(dm, private_data); |
1249c513 | 95 | data += 2; |
1da177e4 LT |
96 | i++; |
97 | } | |
7fce084a JD |
98 | } |
99 | ||
100 | static u32 dmi_base; | |
101 | static u16 dmi_len; | |
102 | static u16 dmi_num; | |
103 | ||
e7a19c56 JD |
104 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
105 | void *)) | |
7fce084a JD |
106 | { |
107 | u8 *buf; | |
108 | ||
109 | buf = dmi_ioremap(dmi_base, dmi_len); | |
110 | if (buf == NULL) | |
111 | return -1; | |
112 | ||
e7a19c56 | 113 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 114 | |
d114a333 TL |
115 | add_device_randomness(buf, dmi_len); |
116 | ||
7fce084a | 117 | dmi_iounmap(buf, dmi_len); |
1da177e4 LT |
118 | return 0; |
119 | } | |
120 | ||
1855256c | 121 | static int __init dmi_checksum(const u8 *buf) |
1da177e4 | 122 | { |
1249c513 | 123 | u8 sum = 0; |
1da177e4 | 124 | int a; |
4f705ae3 | 125 | |
1249c513 AP |
126 | for (a = 0; a < 15; a++) |
127 | sum += buf[a]; | |
128 | ||
129 | return sum == 0; | |
1da177e4 LT |
130 | } |
131 | ||
1da177e4 | 132 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 133 | static LIST_HEAD(dmi_devices); |
4f5c791a | 134 | int dmi_available; |
1da177e4 LT |
135 | |
136 | /* | |
137 | * Save a DMI string | |
138 | */ | |
1855256c | 139 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string) |
1da177e4 | 140 | { |
1855256c JG |
141 | const char *d = (const char*) dm; |
142 | char *p; | |
1249c513 | 143 | |
1da177e4 LT |
144 | if (dmi_ident[slot]) |
145 | return; | |
1249c513 | 146 | |
c3c7120d AP |
147 | p = dmi_string(dm, d[string]); |
148 | if (p == NULL) | |
149 | return; | |
150 | ||
151 | dmi_ident[slot] = p; | |
1da177e4 LT |
152 | } |
153 | ||
1855256c | 154 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 155 | { |
1855256c | 156 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
157 | char *s; |
158 | int is_ff = 1, is_00 = 1, i; | |
159 | ||
160 | if (dmi_ident[slot]) | |
161 | return; | |
162 | ||
163 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
164 | if(d[i] != 0x00) is_ff = 0; | |
165 | if(d[i] != 0xFF) is_00 = 0; | |
166 | } | |
167 | ||
168 | if (is_ff || is_00) | |
169 | return; | |
170 | ||
171 | s = dmi_alloc(16*2+4+1); | |
172 | if (!s) | |
173 | return; | |
174 | ||
bc058f65 | 175 | sprintf(s, "%pUB", d); |
4f5c791a LP |
176 | |
177 | dmi_ident[slot] = s; | |
178 | } | |
179 | ||
1855256c | 180 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 181 | { |
1855256c | 182 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
183 | char *s; |
184 | ||
185 | if (dmi_ident[slot]) | |
186 | return; | |
187 | ||
188 | s = dmi_alloc(4); | |
189 | if (!s) | |
190 | return; | |
191 | ||
192 | sprintf(s, "%u", *d & 0x7F); | |
193 | dmi_ident[slot] = s; | |
194 | } | |
195 | ||
f3069ae9 JD |
196 | static void __init dmi_save_one_device(int type, const char *name) |
197 | { | |
198 | struct dmi_device *dev; | |
199 | ||
200 | /* No duplicate device */ | |
201 | if (dmi_find_device(type, name, NULL)) | |
202 | return; | |
203 | ||
204 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
205 | if (!dev) { | |
206 | printk(KERN_ERR "dmi_save_one_device: out of memory.\n"); | |
207 | return; | |
208 | } | |
209 | ||
210 | dev->type = type; | |
211 | strcpy((char *)(dev + 1), name); | |
212 | dev->name = (char *)(dev + 1); | |
213 | dev->device_data = NULL; | |
214 | list_add(&dev->list, &dmi_devices); | |
215 | } | |
216 | ||
1855256c | 217 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
218 | { |
219 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
220 | |
221 | for (i = 0; i < count; i++) { | |
1855256c | 222 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
223 | |
224 | /* Skip disabled device */ | |
225 | if ((*d & 0x80) == 0) | |
226 | continue; | |
227 | ||
f3069ae9 | 228 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
229 | } |
230 | } | |
231 | ||
1855256c | 232 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
233 | { |
234 | int i, count = *(u8 *)(dm + 1); | |
235 | struct dmi_device *dev; | |
236 | ||
237 | for (i = 1; i <= count; i++) { | |
79da4721 PW |
238 | char *devname = dmi_string(dm, i); |
239 | ||
43fe105a | 240 | if (devname == dmi_empty_string) |
79da4721 | 241 | continue; |
79da4721 | 242 | |
2e0c1f6c SM |
243 | dev = dmi_alloc(sizeof(*dev)); |
244 | if (!dev) { | |
245 | printk(KERN_ERR | |
246 | "dmi_save_oem_strings_devices: out of memory.\n"); | |
247 | break; | |
248 | } | |
249 | ||
250 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 251 | dev->name = devname; |
2e0c1f6c | 252 | dev->device_data = NULL; |
ebad6a42 AP |
253 | |
254 | list_add(&dev->list, &dmi_devices); | |
255 | } | |
256 | } | |
257 | ||
1855256c | 258 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
259 | { |
260 | struct dmi_device *dev; | |
261 | void * data; | |
262 | ||
e9928674 | 263 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
264 | if (data == NULL) { |
265 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
266 | return; | |
267 | } | |
268 | ||
269 | memcpy(data, dm, dm->length); | |
270 | ||
e9928674 | 271 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
272 | if (!dev) { |
273 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
274 | return; | |
275 | } | |
276 | ||
277 | dev->type = DMI_DEV_TYPE_IPMI; | |
278 | dev->name = "IPMI controller"; | |
279 | dev->device_data = data; | |
280 | ||
abd24df8 | 281 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
282 | } |
283 | ||
911e1c9b N |
284 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
285 | int devfn, const char *name) | |
286 | { | |
287 | struct dmi_dev_onboard *onboard_dev; | |
288 | ||
289 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
290 | if (!onboard_dev) { | |
291 | printk(KERN_ERR "dmi_save_dev_onboard: out of memory.\n"); | |
292 | return; | |
293 | } | |
294 | onboard_dev->instance = instance; | |
295 | onboard_dev->segment = segment; | |
296 | onboard_dev->bus = bus; | |
297 | onboard_dev->devfn = devfn; | |
298 | ||
299 | strcpy((char *)&onboard_dev[1], name); | |
300 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
301 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
302 | onboard_dev->dev.device_data = onboard_dev; | |
303 | ||
304 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
305 | } | |
306 | ||
b4bd7d59 WVS |
307 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
308 | { | |
309 | const u8 *d = (u8*) dm + 5; | |
b4bd7d59 WVS |
310 | |
311 | /* Skip disabled device */ | |
312 | if ((*d & 0x80) == 0) | |
313 | return; | |
314 | ||
911e1c9b N |
315 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
316 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 317 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
318 | } |
319 | ||
1da177e4 LT |
320 | /* |
321 | * Process a DMI table entry. Right now all we care about are the BIOS | |
322 | * and machine entries. For 2.5 we should pull the smbus controller info | |
323 | * out of here. | |
324 | */ | |
e7a19c56 | 325 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 326 | { |
1249c513 | 327 | switch(dm->type) { |
ebad6a42 | 328 | case 0: /* BIOS Information */ |
1249c513 | 329 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 330 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
331 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
332 | break; | |
ebad6a42 | 333 | case 1: /* System Information */ |
1249c513 | 334 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 335 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 336 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 337 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 338 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 339 | break; |
ebad6a42 | 340 | case 2: /* Base Board Information */ |
1249c513 | 341 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 342 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 343 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
344 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
345 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
346 | break; | |
347 | case 3: /* Chassis Information */ | |
348 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
349 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
350 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
351 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
352 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 353 | break; |
ebad6a42 AP |
354 | case 10: /* Onboard Devices Information */ |
355 | dmi_save_devices(dm); | |
356 | break; | |
2e0c1f6c SM |
357 | case 11: /* OEM Strings */ |
358 | dmi_save_oem_strings_devices(dm); | |
359 | break; | |
ebad6a42 AP |
360 | case 38: /* IPMI Device Information */ |
361 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
362 | break; |
363 | case 41: /* Onboard Devices Extended Information */ | |
364 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
365 | } |
366 | } | |
367 | ||
8881cdce BH |
368 | static void __init print_filtered(const char *info) |
369 | { | |
370 | const char *p; | |
371 | ||
372 | if (!info) | |
373 | return; | |
374 | ||
375 | for (p = info; *p; p++) | |
376 | if (isprint(*p)) | |
377 | printk(KERN_CONT "%c", *p); | |
378 | else | |
379 | printk(KERN_CONT "\\x%02x", *p & 0xff); | |
380 | } | |
381 | ||
382 | static void __init dmi_dump_ids(void) | |
383 | { | |
84e383b3 NC |
384 | const char *board; /* Board Name is optional */ |
385 | ||
8881cdce | 386 | printk(KERN_DEBUG "DMI: "); |
84e383b3 NC |
387 | print_filtered(dmi_get_system_info(DMI_SYS_VENDOR)); |
388 | printk(KERN_CONT " "); | |
8881cdce | 389 | print_filtered(dmi_get_system_info(DMI_PRODUCT_NAME)); |
84e383b3 NC |
390 | board = dmi_get_system_info(DMI_BOARD_NAME); |
391 | if (board) { | |
392 | printk(KERN_CONT "/"); | |
393 | print_filtered(board); | |
394 | } | |
8881cdce BH |
395 | printk(KERN_CONT ", BIOS "); |
396 | print_filtered(dmi_get_system_info(DMI_BIOS_VERSION)); | |
397 | printk(KERN_CONT " "); | |
398 | print_filtered(dmi_get_system_info(DMI_BIOS_DATE)); | |
399 | printk(KERN_CONT "\n"); | |
400 | } | |
401 | ||
1855256c | 402 | static int __init dmi_present(const char __iomem *p) |
1da177e4 | 403 | { |
61e032fa | 404 | u8 buf[15]; |
1855256c | 405 | |
3ed3bce8 MD |
406 | memcpy_fromio(buf, p, 15); |
407 | if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { | |
7fce084a JD |
408 | dmi_num = (buf[13] << 8) | buf[12]; |
409 | dmi_len = (buf[7] << 8) | buf[6]; | |
410 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 411 | (buf[9] << 8) | buf[8]; |
61e032fa | 412 | |
3ed3bce8 MD |
413 | /* |
414 | * DMI version 0.0 means that the real version is taken from | |
415 | * the SMBIOS version, which we don't know at this point. | |
416 | */ | |
417 | if (buf[14] != 0) | |
418 | printk(KERN_INFO "DMI %d.%d present.\n", | |
419 | buf[14] >> 4, buf[14] & 0xF); | |
420 | else | |
421 | printk(KERN_INFO "DMI present.\n"); | |
8881cdce BH |
422 | if (dmi_walk_early(dmi_decode) == 0) { |
423 | dmi_dump_ids(); | |
3ed3bce8 | 424 | return 0; |
8881cdce | 425 | } |
3ed3bce8 MD |
426 | } |
427 | return 1; | |
428 | } | |
61e032fa | 429 | |
3ed3bce8 MD |
430 | void __init dmi_scan_machine(void) |
431 | { | |
432 | char __iomem *p, *q; | |
433 | int rc; | |
434 | ||
435 | if (efi_enabled) { | |
b2c99e3c | 436 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 437 | goto error; |
3ed3bce8 | 438 | |
4f5c791a LP |
439 | /* This is called as a core_initcall() because it isn't |
440 | * needed during early boot. This also means we can | |
441 | * iounmap the space when we're done with it. | |
442 | */ | |
b2c99e3c | 443 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 444 | if (p == NULL) |
9a22b6e7 | 445 | goto error; |
3ed3bce8 MD |
446 | |
447 | rc = dmi_present(p + 0x10); /* offset of _DMI_ string */ | |
23dd842c | 448 | dmi_iounmap(p, 32); |
4f5c791a LP |
449 | if (!rc) { |
450 | dmi_available = 1; | |
9a22b6e7 | 451 | goto out; |
4f5c791a | 452 | } |
3ed3bce8 MD |
453 | } |
454 | else { | |
455 | /* | |
456 | * no iounmap() for that ioremap(); it would be a no-op, but | |
457 | * it's so early in setup that sucker gets confused into doing | |
458 | * what it shouldn't if we actually call it. | |
459 | */ | |
460 | p = dmi_ioremap(0xF0000, 0x10000); | |
461 | if (p == NULL) | |
9a22b6e7 | 462 | goto error; |
3ed3bce8 MD |
463 | |
464 | for (q = p; q < p + 0x10000; q += 16) { | |
465 | rc = dmi_present(q); | |
4f5c791a LP |
466 | if (!rc) { |
467 | dmi_available = 1; | |
0d64484f | 468 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 469 | goto out; |
4f5c791a | 470 | } |
61e032fa | 471 | } |
3212bff3 | 472 | dmi_iounmap(p, 0x10000); |
61e032fa | 473 | } |
9a22b6e7 IM |
474 | error: |
475 | printk(KERN_INFO "DMI not present or invalid.\n"); | |
476 | out: | |
477 | dmi_initialized = 1; | |
1da177e4 LT |
478 | } |
479 | ||
d7b1956f RW |
480 | /** |
481 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
482 | * @dmi: pointer to the dmi_system_id structure to check | |
483 | */ | |
484 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
485 | { | |
486 | int i; | |
487 | ||
488 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
489 | ||
490 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
491 | int s = dmi->matches[i].slot; | |
492 | if (s == DMI_NONE) | |
75757507 | 493 | break; |
d7b1956f RW |
494 | if (dmi_ident[s] |
495 | && strstr(dmi_ident[s], dmi->matches[i].substr)) | |
496 | continue; | |
497 | /* No match */ | |
498 | return false; | |
499 | } | |
500 | return true; | |
501 | } | |
502 | ||
75757507 DT |
503 | /** |
504 | * dmi_is_end_of_table - check for end-of-table marker | |
505 | * @dmi: pointer to the dmi_system_id structure to check | |
506 | */ | |
507 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
508 | { | |
509 | return dmi->matches[0].slot == DMI_NONE; | |
510 | } | |
511 | ||
1da177e4 LT |
512 | /** |
513 | * dmi_check_system - check system DMI data | |
514 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
515 | * All non-null elements of the list must match |
516 | * their slot's (field index's) data (i.e., each | |
517 | * list string must be a substring of the specified | |
518 | * DMI slot's string data) to be considered a | |
519 | * successful match. | |
1da177e4 LT |
520 | * |
521 | * Walk the blacklist table running matching functions until someone | |
522 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 523 | * each successful match. Returns the number of matches. |
1da177e4 | 524 | */ |
1855256c | 525 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 526 | { |
d7b1956f RW |
527 | int count = 0; |
528 | const struct dmi_system_id *d; | |
529 | ||
75757507 | 530 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
531 | if (dmi_matches(d)) { |
532 | count++; | |
533 | if (d->callback && d->callback(d)) | |
534 | break; | |
1da177e4 | 535 | } |
1da177e4 LT |
536 | |
537 | return count; | |
538 | } | |
1da177e4 LT |
539 | EXPORT_SYMBOL(dmi_check_system); |
540 | ||
d7b1956f RW |
541 | /** |
542 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
543 | * @list: array of dmi_system_id structures to match against | |
544 | * All non-null elements of the list must match | |
545 | * their slot's (field index's) data (i.e., each | |
546 | * list string must be a substring of the specified | |
547 | * DMI slot's string data) to be considered a | |
548 | * successful match. | |
549 | * | |
550 | * Walk the blacklist table until the first match is found. Return the | |
551 | * pointer to the matching entry or NULL if there's no match. | |
552 | */ | |
553 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
554 | { | |
555 | const struct dmi_system_id *d; | |
556 | ||
75757507 | 557 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
558 | if (dmi_matches(d)) |
559 | return d; | |
560 | ||
561 | return NULL; | |
562 | } | |
563 | EXPORT_SYMBOL(dmi_first_match); | |
564 | ||
1da177e4 LT |
565 | /** |
566 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 567 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
568 | * |
569 | * Returns one DMI data value, can be used to perform | |
570 | * complex DMI data checks. | |
571 | */ | |
1855256c | 572 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
573 | { |
574 | return dmi_ident[field]; | |
575 | } | |
e70c9d5e | 576 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 577 | |
fd8cd7e1 | 578 | /** |
c2bacfc4 RD |
579 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
580 | * @str: string to check for | |
fd8cd7e1 AK |
581 | */ |
582 | int dmi_name_in_serial(const char *str) | |
583 | { | |
584 | int f = DMI_PRODUCT_SERIAL; | |
585 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
586 | return 1; | |
587 | return 0; | |
588 | } | |
a1bae672 AK |
589 | |
590 | /** | |
66e13e66 | 591 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
a1bae672 AK |
592 | * @str: Case sensitive Name |
593 | */ | |
1855256c | 594 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 595 | { |
66e13e66 | 596 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
597 | int i; |
598 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
599 | int f = fields[i]; | |
600 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
601 | return 1; | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
606 | ||
ebad6a42 AP |
607 | /** |
608 | * dmi_find_device - find onboard device by type/name | |
609 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 610 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
611 | * @from: previous device found in search, or %NULL for new search. |
612 | * | |
613 | * Iterates through the list of known onboard devices. If a device is | |
614 | * found with a matching @vendor and @device, a pointer to its device | |
615 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 616 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
617 | * If @from is not %NULL, searches continue from next device. |
618 | */ | |
1855256c JG |
619 | const struct dmi_device * dmi_find_device(int type, const char *name, |
620 | const struct dmi_device *from) | |
ebad6a42 | 621 | { |
1855256c JG |
622 | const struct list_head *head = from ? &from->list : &dmi_devices; |
623 | struct list_head *d; | |
ebad6a42 AP |
624 | |
625 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
1855256c JG |
626 | const struct dmi_device *dev = |
627 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
628 | |
629 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
630 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
631 | return dev; | |
632 | } | |
633 | ||
634 | return NULL; | |
635 | } | |
636 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
637 | |
638 | /** | |
3e5cd1f2 TH |
639 | * dmi_get_date - parse a DMI date |
640 | * @field: data index (see enum dmi_field) | |
641 | * @yearp: optional out parameter for the year | |
642 | * @monthp: optional out parameter for the month | |
643 | * @dayp: optional out parameter for the day | |
f083a329 | 644 | * |
3e5cd1f2 TH |
645 | * The date field is assumed to be in the form resembling |
646 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
647 | * parameters any or all of which can be omitted. | |
648 | * | |
649 | * If the field doesn't exist, all out parameters are set to zero | |
650 | * and false is returned. Otherwise, true is returned with any | |
651 | * invalid part of date set to zero. | |
652 | * | |
653 | * On return, year, month and day are guaranteed to be in the | |
654 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 655 | */ |
3e5cd1f2 | 656 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 657 | { |
3e5cd1f2 TH |
658 | int year = 0, month = 0, day = 0; |
659 | bool exists; | |
660 | const char *s, *y; | |
02c24fa8 | 661 | char *e; |
f083a329 | 662 | |
3e5cd1f2 TH |
663 | s = dmi_get_system_info(field); |
664 | exists = s; | |
665 | if (!exists) | |
666 | goto out; | |
f083a329 | 667 | |
3e5cd1f2 TH |
668 | /* |
669 | * Determine year first. We assume the date string resembles | |
670 | * mm/dd/yy[yy] but the original code extracted only the year | |
671 | * from the end. Keep the behavior in the spirit of no | |
672 | * surprises. | |
673 | */ | |
674 | y = strrchr(s, '/'); | |
675 | if (!y) | |
676 | goto out; | |
677 | ||
678 | y++; | |
679 | year = simple_strtoul(y, &e, 10); | |
680 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
681 | year += 1900; |
682 | if (year < 1996) /* no dates < spec 1.0 */ | |
683 | year += 100; | |
684 | } | |
3e5cd1f2 TH |
685 | if (year > 9999) /* year should fit in %04d */ |
686 | year = 0; | |
687 | ||
688 | /* parse the mm and dd */ | |
689 | month = simple_strtoul(s, &e, 10); | |
690 | if (s == e || *e != '/' || !month || month > 12) { | |
691 | month = 0; | |
692 | goto out; | |
693 | } | |
f083a329 | 694 | |
3e5cd1f2 TH |
695 | s = e + 1; |
696 | day = simple_strtoul(s, &e, 10); | |
697 | if (s == y || s == e || *e != '/' || day > 31) | |
698 | day = 0; | |
699 | out: | |
700 | if (yearp) | |
701 | *yearp = year; | |
702 | if (monthp) | |
703 | *monthp = month; | |
704 | if (dayp) | |
705 | *dayp = day; | |
706 | return exists; | |
f083a329 | 707 | } |
3e5cd1f2 | 708 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
709 | |
710 | /** | |
711 | * dmi_walk - Walk the DMI table and get called back for every record | |
712 | * @decode: Callback function | |
e7a19c56 | 713 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
714 | * |
715 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
716 | */ | |
e7a19c56 JD |
717 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
718 | void *private_data) | |
7fce084a JD |
719 | { |
720 | u8 *buf; | |
721 | ||
722 | if (!dmi_available) | |
723 | return -1; | |
724 | ||
725 | buf = ioremap(dmi_base, dmi_len); | |
726 | if (buf == NULL) | |
727 | return -1; | |
728 | ||
e7a19c56 | 729 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a JD |
730 | |
731 | iounmap(buf); | |
732 | return 0; | |
733 | } | |
734 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
735 | |
736 | /** | |
737 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
738 | * @f: DMI field identifier |
739 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
740 | * |
741 | * Returns true if the requested field equals to the str (including NULL). | |
742 | */ | |
743 | bool dmi_match(enum dmi_field f, const char *str) | |
744 | { | |
745 | const char *info = dmi_get_system_info(f); | |
746 | ||
747 | if (info == NULL || str == NULL) | |
748 | return info == str; | |
749 | ||
750 | return !strcmp(info, str); | |
751 | } | |
752 | EXPORT_SYMBOL_GPL(dmi_match); |