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Commit | Line | Data |
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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 | |
79da4721 PW |
11 | static char dmi_empty_string[] = " "; |
12 | ||
1855256c | 13 | static char * __init dmi_string(const struct dmi_header *dm, u8 s) |
1da177e4 | 14 | { |
1855256c | 15 | const u8 *bp = ((u8 *) dm) + dm->length; |
c3c7120d | 16 | char *str = ""; |
1249c513 | 17 | |
c3c7120d | 18 | if (s) { |
1da177e4 | 19 | s--; |
c3c7120d AP |
20 | while (s > 0 && *bp) { |
21 | bp += strlen(bp) + 1; | |
22 | s--; | |
23 | } | |
24 | ||
25 | if (*bp != 0) { | |
79da4721 PW |
26 | size_t len = strlen(bp)+1; |
27 | size_t cmp_len = len > 8 ? 8 : len; | |
28 | ||
29 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
30 | return dmi_empty_string; | |
31 | str = dmi_alloc(len); | |
c3c7120d AP |
32 | if (str != NULL) |
33 | strcpy(str, bp); | |
34 | else | |
79da4721 | 35 | printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len); |
c3c7120d | 36 | } |
4f705ae3 | 37 | } |
c3c7120d AP |
38 | |
39 | return str; | |
1da177e4 LT |
40 | } |
41 | ||
42 | /* | |
43 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
44 | * pointing to completely the wrong place for example | |
45 | */ | |
7fce084a JD |
46 | static void dmi_table(u8 *buf, int len, int num, |
47 | void (*decode)(const struct dmi_header *)) | |
1da177e4 | 48 | { |
7fce084a | 49 | u8 *data = buf; |
1249c513 | 50 | int i = 0; |
4f705ae3 | 51 | |
1da177e4 | 52 | /* |
4f705ae3 BH |
53 | * Stop when we see all the items the table claimed to have |
54 | * OR we run off the end of the table (also happens) | |
55 | */ | |
1249c513 | 56 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
57 | const struct dmi_header *dm = (const struct dmi_header *)data; |
58 | ||
1da177e4 LT |
59 | /* |
60 | * We want to know the total length (formated area and strings) | |
61 | * before decoding to make sure we won't run off the table in | |
62 | * dmi_decode or dmi_string | |
63 | */ | |
1249c513 AP |
64 | data += dm->length; |
65 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 66 | data++; |
1249c513 | 67 | if (data - buf < len - 1) |
1da177e4 | 68 | decode(dm); |
1249c513 | 69 | data += 2; |
1da177e4 LT |
70 | i++; |
71 | } | |
7fce084a JD |
72 | } |
73 | ||
74 | static u32 dmi_base; | |
75 | static u16 dmi_len; | |
76 | static u16 dmi_num; | |
77 | ||
78 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *)) | |
79 | { | |
80 | u8 *buf; | |
81 | ||
82 | buf = dmi_ioremap(dmi_base, dmi_len); | |
83 | if (buf == NULL) | |
84 | return -1; | |
85 | ||
86 | dmi_table(buf, dmi_len, dmi_num, decode); | |
87 | ||
88 | dmi_iounmap(buf, dmi_len); | |
1da177e4 LT |
89 | return 0; |
90 | } | |
91 | ||
1855256c | 92 | static int __init dmi_checksum(const u8 *buf) |
1da177e4 | 93 | { |
1249c513 | 94 | u8 sum = 0; |
1da177e4 | 95 | int a; |
4f705ae3 | 96 | |
1249c513 AP |
97 | for (a = 0; a < 15; a++) |
98 | sum += buf[a]; | |
99 | ||
100 | return sum == 0; | |
1da177e4 LT |
101 | } |
102 | ||
1da177e4 | 103 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 104 | static LIST_HEAD(dmi_devices); |
4f5c791a | 105 | int dmi_available; |
1da177e4 LT |
106 | |
107 | /* | |
108 | * Save a DMI string | |
109 | */ | |
1855256c | 110 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string) |
1da177e4 | 111 | { |
1855256c JG |
112 | const char *d = (const char*) dm; |
113 | char *p; | |
1249c513 | 114 | |
1da177e4 LT |
115 | if (dmi_ident[slot]) |
116 | return; | |
1249c513 | 117 | |
c3c7120d AP |
118 | p = dmi_string(dm, d[string]); |
119 | if (p == NULL) | |
120 | return; | |
121 | ||
122 | dmi_ident[slot] = p; | |
1da177e4 LT |
123 | } |
124 | ||
1855256c | 125 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 126 | { |
1855256c | 127 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
128 | char *s; |
129 | int is_ff = 1, is_00 = 1, i; | |
130 | ||
131 | if (dmi_ident[slot]) | |
132 | return; | |
133 | ||
134 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
135 | if(d[i] != 0x00) is_ff = 0; | |
136 | if(d[i] != 0xFF) is_00 = 0; | |
137 | } | |
138 | ||
139 | if (is_ff || is_00) | |
140 | return; | |
141 | ||
142 | s = dmi_alloc(16*2+4+1); | |
143 | if (!s) | |
144 | return; | |
145 | ||
146 | sprintf(s, | |
147 | "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X", | |
148 | d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7], | |
149 | d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]); | |
150 | ||
151 | dmi_ident[slot] = s; | |
152 | } | |
153 | ||
1855256c | 154 | static void __init dmi_save_type(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 | ||
159 | if (dmi_ident[slot]) | |
160 | return; | |
161 | ||
162 | s = dmi_alloc(4); | |
163 | if (!s) | |
164 | return; | |
165 | ||
166 | sprintf(s, "%u", *d & 0x7F); | |
167 | dmi_ident[slot] = s; | |
168 | } | |
169 | ||
1855256c | 170 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
171 | { |
172 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
173 | struct dmi_device *dev; | |
174 | ||
175 | for (i = 0; i < count; i++) { | |
1855256c | 176 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
177 | |
178 | /* Skip disabled device */ | |
179 | if ((*d & 0x80) == 0) | |
180 | continue; | |
181 | ||
e9928674 | 182 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
183 | if (!dev) { |
184 | printk(KERN_ERR "dmi_save_devices: out of memory.\n"); | |
185 | break; | |
186 | } | |
187 | ||
188 | dev->type = *d++ & 0x7f; | |
189 | dev->name = dmi_string(dm, *d); | |
190 | dev->device_data = NULL; | |
2e0c1f6c SM |
191 | list_add(&dev->list, &dmi_devices); |
192 | } | |
193 | } | |
194 | ||
79da4721 PW |
195 | static struct dmi_device empty_oem_string_dev = { |
196 | .name = dmi_empty_string, | |
197 | }; | |
198 | ||
1855256c | 199 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
200 | { |
201 | int i, count = *(u8 *)(dm + 1); | |
202 | struct dmi_device *dev; | |
203 | ||
204 | for (i = 1; i <= count; i++) { | |
79da4721 PW |
205 | char *devname = dmi_string(dm, i); |
206 | ||
207 | if (!strcmp(devname, dmi_empty_string)) { | |
208 | list_add(&empty_oem_string_dev.list, &dmi_devices); | |
209 | continue; | |
210 | } | |
211 | ||
2e0c1f6c SM |
212 | dev = dmi_alloc(sizeof(*dev)); |
213 | if (!dev) { | |
214 | printk(KERN_ERR | |
215 | "dmi_save_oem_strings_devices: out of memory.\n"); | |
216 | break; | |
217 | } | |
218 | ||
219 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 220 | dev->name = devname; |
2e0c1f6c | 221 | dev->device_data = NULL; |
ebad6a42 AP |
222 | |
223 | list_add(&dev->list, &dmi_devices); | |
224 | } | |
225 | } | |
226 | ||
1855256c | 227 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
228 | { |
229 | struct dmi_device *dev; | |
230 | void * data; | |
231 | ||
e9928674 | 232 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
233 | if (data == NULL) { |
234 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
235 | return; | |
236 | } | |
237 | ||
238 | memcpy(data, dm, dm->length); | |
239 | ||
e9928674 | 240 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
241 | if (!dev) { |
242 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
243 | return; | |
244 | } | |
245 | ||
246 | dev->type = DMI_DEV_TYPE_IPMI; | |
247 | dev->name = "IPMI controller"; | |
248 | dev->device_data = data; | |
249 | ||
250 | list_add(&dev->list, &dmi_devices); | |
251 | } | |
252 | ||
1da177e4 LT |
253 | /* |
254 | * Process a DMI table entry. Right now all we care about are the BIOS | |
255 | * and machine entries. For 2.5 we should pull the smbus controller info | |
256 | * out of here. | |
257 | */ | |
1855256c | 258 | static void __init dmi_decode(const struct dmi_header *dm) |
1da177e4 | 259 | { |
1249c513 | 260 | switch(dm->type) { |
ebad6a42 | 261 | case 0: /* BIOS Information */ |
1249c513 | 262 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 263 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
264 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
265 | break; | |
ebad6a42 | 266 | case 1: /* System Information */ |
1249c513 | 267 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 268 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 269 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 270 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 271 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 272 | break; |
ebad6a42 | 273 | case 2: /* Base Board Information */ |
1249c513 | 274 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 275 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 276 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
277 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
278 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
279 | break; | |
280 | case 3: /* Chassis Information */ | |
281 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
282 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
283 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
284 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
285 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 286 | break; |
ebad6a42 AP |
287 | case 10: /* Onboard Devices Information */ |
288 | dmi_save_devices(dm); | |
289 | break; | |
2e0c1f6c SM |
290 | case 11: /* OEM Strings */ |
291 | dmi_save_oem_strings_devices(dm); | |
292 | break; | |
ebad6a42 AP |
293 | case 38: /* IPMI Device Information */ |
294 | dmi_save_ipmi_device(dm); | |
1da177e4 LT |
295 | } |
296 | } | |
297 | ||
1855256c | 298 | static int __init dmi_present(const char __iomem *p) |
1da177e4 | 299 | { |
61e032fa | 300 | u8 buf[15]; |
1855256c | 301 | |
3ed3bce8 MD |
302 | memcpy_fromio(buf, p, 15); |
303 | if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) { | |
7fce084a JD |
304 | dmi_num = (buf[13] << 8) | buf[12]; |
305 | dmi_len = (buf[7] << 8) | buf[6]; | |
306 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 307 | (buf[9] << 8) | buf[8]; |
61e032fa | 308 | |
3ed3bce8 MD |
309 | /* |
310 | * DMI version 0.0 means that the real version is taken from | |
311 | * the SMBIOS version, which we don't know at this point. | |
312 | */ | |
313 | if (buf[14] != 0) | |
314 | printk(KERN_INFO "DMI %d.%d present.\n", | |
315 | buf[14] >> 4, buf[14] & 0xF); | |
316 | else | |
317 | printk(KERN_INFO "DMI present.\n"); | |
7fce084a | 318 | if (dmi_walk_early(dmi_decode) == 0) |
3ed3bce8 MD |
319 | return 0; |
320 | } | |
321 | return 1; | |
322 | } | |
61e032fa | 323 | |
3ed3bce8 MD |
324 | void __init dmi_scan_machine(void) |
325 | { | |
326 | char __iomem *p, *q; | |
327 | int rc; | |
328 | ||
329 | if (efi_enabled) { | |
b2c99e3c | 330 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
3ed3bce8 MD |
331 | goto out; |
332 | ||
4f5c791a LP |
333 | /* This is called as a core_initcall() because it isn't |
334 | * needed during early boot. This also means we can | |
335 | * iounmap the space when we're done with it. | |
336 | */ | |
b2c99e3c | 337 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 MD |
338 | if (p == NULL) |
339 | goto out; | |
340 | ||
341 | rc = dmi_present(p + 0x10); /* offset of _DMI_ string */ | |
23dd842c | 342 | dmi_iounmap(p, 32); |
4f5c791a LP |
343 | if (!rc) { |
344 | dmi_available = 1; | |
3ed3bce8 | 345 | return; |
4f5c791a | 346 | } |
3ed3bce8 MD |
347 | } |
348 | else { | |
349 | /* | |
350 | * no iounmap() for that ioremap(); it would be a no-op, but | |
351 | * it's so early in setup that sucker gets confused into doing | |
352 | * what it shouldn't if we actually call it. | |
353 | */ | |
354 | p = dmi_ioremap(0xF0000, 0x10000); | |
355 | if (p == NULL) | |
356 | goto out; | |
357 | ||
358 | for (q = p; q < p + 0x10000; q += 16) { | |
359 | rc = dmi_present(q); | |
4f5c791a LP |
360 | if (!rc) { |
361 | dmi_available = 1; | |
0d64484f | 362 | dmi_iounmap(p, 0x10000); |
61e032fa | 363 | return; |
4f5c791a | 364 | } |
61e032fa | 365 | } |
3212bff3 | 366 | dmi_iounmap(p, 0x10000); |
61e032fa | 367 | } |
3ed3bce8 | 368 | out: printk(KERN_INFO "DMI not present or invalid.\n"); |
1da177e4 LT |
369 | } |
370 | ||
1da177e4 LT |
371 | /** |
372 | * dmi_check_system - check system DMI data | |
373 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
374 | * All non-null elements of the list must match |
375 | * their slot's (field index's) data (i.e., each | |
376 | * list string must be a substring of the specified | |
377 | * DMI slot's string data) to be considered a | |
378 | * successful match. | |
1da177e4 LT |
379 | * |
380 | * Walk the blacklist table running matching functions until someone | |
381 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 382 | * each successful match. Returns the number of matches. |
1da177e4 | 383 | */ |
1855256c | 384 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 LT |
385 | { |
386 | int i, count = 0; | |
1855256c | 387 | const struct dmi_system_id *d = list; |
1da177e4 LT |
388 | |
389 | while (d->ident) { | |
390 | for (i = 0; i < ARRAY_SIZE(d->matches); i++) { | |
391 | int s = d->matches[i].slot; | |
392 | if (s == DMI_NONE) | |
393 | continue; | |
394 | if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr)) | |
395 | continue; | |
396 | /* No match */ | |
397 | goto fail; | |
398 | } | |
640e8033 | 399 | count++; |
1da177e4 LT |
400 | if (d->callback && d->callback(d)) |
401 | break; | |
1da177e4 LT |
402 | fail: d++; |
403 | } | |
404 | ||
405 | return count; | |
406 | } | |
1da177e4 LT |
407 | EXPORT_SYMBOL(dmi_check_system); |
408 | ||
409 | /** | |
410 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 411 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
412 | * |
413 | * Returns one DMI data value, can be used to perform | |
414 | * complex DMI data checks. | |
415 | */ | |
1855256c | 416 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
417 | { |
418 | return dmi_ident[field]; | |
419 | } | |
e70c9d5e | 420 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 421 | |
a1bae672 AK |
422 | |
423 | /** | |
424 | * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information. | |
425 | * @str: Case sensitive Name | |
426 | */ | |
1855256c | 427 | int dmi_name_in_vendors(const char *str) |
a1bae672 AK |
428 | { |
429 | static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR, | |
430 | DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR, | |
431 | DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE }; | |
432 | int i; | |
433 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
434 | int f = fields[i]; | |
435 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
436 | return 1; | |
437 | } | |
438 | return 0; | |
439 | } | |
440 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
441 | ||
ebad6a42 AP |
442 | /** |
443 | * dmi_find_device - find onboard device by type/name | |
444 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 445 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
446 | * @from: previous device found in search, or %NULL for new search. |
447 | * | |
448 | * Iterates through the list of known onboard devices. If a device is | |
449 | * found with a matching @vendor and @device, a pointer to its device | |
450 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 451 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
452 | * If @from is not %NULL, searches continue from next device. |
453 | */ | |
1855256c JG |
454 | const struct dmi_device * dmi_find_device(int type, const char *name, |
455 | const struct dmi_device *from) | |
ebad6a42 | 456 | { |
1855256c JG |
457 | const struct list_head *head = from ? &from->list : &dmi_devices; |
458 | struct list_head *d; | |
ebad6a42 AP |
459 | |
460 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
1855256c JG |
461 | const struct dmi_device *dev = |
462 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
463 | |
464 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
465 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
466 | return dev; | |
467 | } | |
468 | ||
469 | return NULL; | |
470 | } | |
471 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
472 | |
473 | /** | |
474 | * dmi_get_year - Return year of a DMI date | |
475 | * @field: data index (like dmi_get_system_info) | |
476 | * | |
477 | * Returns -1 when the field doesn't exist. 0 when it is broken. | |
478 | */ | |
479 | int dmi_get_year(int field) | |
480 | { | |
481 | int year; | |
1855256c | 482 | const char *s = dmi_get_system_info(field); |
f083a329 AK |
483 | |
484 | if (!s) | |
485 | return -1; | |
486 | if (*s == '\0') | |
487 | return 0; | |
488 | s = strrchr(s, '/'); | |
489 | if (!s) | |
490 | return 0; | |
491 | ||
492 | s += 1; | |
493 | year = simple_strtoul(s, NULL, 0); | |
494 | if (year && year < 100) { /* 2-digit year */ | |
495 | year += 1900; | |
496 | if (year < 1996) /* no dates < spec 1.0 */ | |
497 | year += 100; | |
498 | } | |
499 | ||
500 | return year; | |
501 | } | |
7fce084a JD |
502 | |
503 | /** | |
504 | * dmi_walk - Walk the DMI table and get called back for every record | |
505 | * @decode: Callback function | |
506 | * | |
507 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
508 | */ | |
509 | int dmi_walk(void (*decode)(const struct dmi_header *)) | |
510 | { | |
511 | u8 *buf; | |
512 | ||
513 | if (!dmi_available) | |
514 | return -1; | |
515 | ||
516 | buf = ioremap(dmi_base, dmi_len); | |
517 | if (buf == NULL) | |
518 | return -1; | |
519 | ||
520 | dmi_table(buf, dmi_len, dmi_num, decode); | |
521 | ||
522 | iounmap(buf); | |
523 | return 0; | |
524 | } | |
525 | EXPORT_SYMBOL_GPL(dmi_walk); |