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> |
0841c04d | 11 | #include <asm/unaligned.h> |
1da177e4 | 12 | |
cb5dd7c1 PJ |
13 | /* |
14 | * DMI stands for "Desktop Management Interface". It is part | |
15 | * of and an antecedent to, SMBIOS, which stands for System | |
16 | * Management BIOS. See further: http://www.dmtf.org/standards | |
17 | */ | |
ffbbb96d | 18 | static const char dmi_empty_string[] = " "; |
79da4721 | 19 | |
f1d8e614 | 20 | static u16 __initdata dmi_ver; |
9a22b6e7 IM |
21 | /* |
22 | * Catch too early calls to dmi_check_system(): | |
23 | */ | |
24 | static int dmi_initialized; | |
25 | ||
c90fe6bc TH |
26 | /* DMI system identification string used during boot */ |
27 | static char dmi_ids_string[128] __initdata; | |
28 | ||
dd6dad42 CG |
29 | static struct dmi_memdev_info { |
30 | const char *device; | |
31 | const char *bank; | |
32 | u16 handle; | |
33 | } *dmi_memdev; | |
34 | static int dmi_memdev_nr; | |
35 | ||
f3069ae9 | 36 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 37 | { |
1855256c | 38 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 39 | |
c3c7120d | 40 | if (s) { |
1da177e4 | 41 | s--; |
c3c7120d AP |
42 | while (s > 0 && *bp) { |
43 | bp += strlen(bp) + 1; | |
44 | s--; | |
45 | } | |
46 | ||
47 | if (*bp != 0) { | |
79da4721 PW |
48 | size_t len = strlen(bp)+1; |
49 | size_t cmp_len = len > 8 ? 8 : len; | |
50 | ||
51 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
52 | return dmi_empty_string; | |
f3069ae9 | 53 | return bp; |
c3c7120d | 54 | } |
4f705ae3 | 55 | } |
c3c7120d | 56 | |
f3069ae9 JD |
57 | return ""; |
58 | } | |
59 | ||
ffbbb96d | 60 | static const char * __init dmi_string(const struct dmi_header *dm, u8 s) |
f3069ae9 JD |
61 | { |
62 | const char *bp = dmi_string_nosave(dm, s); | |
63 | char *str; | |
64 | size_t len; | |
65 | ||
66 | if (bp == dmi_empty_string) | |
67 | return dmi_empty_string; | |
68 | ||
69 | len = strlen(bp) + 1; | |
70 | str = dmi_alloc(len); | |
71 | if (str != NULL) | |
72 | strcpy(str, bp); | |
f3069ae9 | 73 | |
c3c7120d | 74 | return str; |
1da177e4 LT |
75 | } |
76 | ||
77 | /* | |
78 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
79 | * pointing to completely the wrong place for example | |
80 | */ | |
7fce084a | 81 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
82 | void (*decode)(const struct dmi_header *, void *), |
83 | void *private_data) | |
1da177e4 | 84 | { |
7fce084a | 85 | u8 *data = buf; |
1249c513 | 86 | int i = 0; |
4f705ae3 | 87 | |
1da177e4 | 88 | /* |
4f705ae3 BH |
89 | * Stop when we see all the items the table claimed to have |
90 | * OR we run off the end of the table (also happens) | |
91 | */ | |
1249c513 | 92 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
93 | const struct dmi_header *dm = (const struct dmi_header *)data; |
94 | ||
1da177e4 | 95 | /* |
8638545c AC |
96 | * We want to know the total length (formatted area and |
97 | * strings) before decoding to make sure we won't run off the | |
98 | * table in dmi_decode or dmi_string | |
1da177e4 | 99 | */ |
1249c513 AP |
100 | data += dm->length; |
101 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 102 | data++; |
1249c513 | 103 | if (data - buf < len - 1) |
e7a19c56 | 104 | decode(dm, private_data); |
1249c513 | 105 | data += 2; |
1da177e4 LT |
106 | i++; |
107 | } | |
7fce084a JD |
108 | } |
109 | ||
110 | static u32 dmi_base; | |
111 | static u16 dmi_len; | |
112 | static u16 dmi_num; | |
113 | ||
e7a19c56 JD |
114 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
115 | void *)) | |
7fce084a JD |
116 | { |
117 | u8 *buf; | |
118 | ||
cf074402 | 119 | buf = dmi_early_remap(dmi_base, dmi_len); |
7fce084a JD |
120 | if (buf == NULL) |
121 | return -1; | |
122 | ||
e7a19c56 | 123 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 124 | |
d114a333 TL |
125 | add_device_randomness(buf, dmi_len); |
126 | ||
cf074402 | 127 | dmi_early_unmap(buf, dmi_len); |
1da177e4 LT |
128 | return 0; |
129 | } | |
130 | ||
9f9c9cbb | 131 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 132 | { |
1249c513 | 133 | u8 sum = 0; |
1da177e4 | 134 | int a; |
4f705ae3 | 135 | |
9f9c9cbb | 136 | for (a = 0; a < len; a++) |
1249c513 AP |
137 | sum += buf[a]; |
138 | ||
139 | return sum == 0; | |
1da177e4 LT |
140 | } |
141 | ||
ffbbb96d | 142 | static const char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 143 | static LIST_HEAD(dmi_devices); |
4f5c791a | 144 | int dmi_available; |
1da177e4 LT |
145 | |
146 | /* | |
147 | * Save a DMI string | |
148 | */ | |
02d9c47f JD |
149 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, |
150 | int string) | |
1da177e4 | 151 | { |
02d9c47f | 152 | const char *d = (const char *) dm; |
ffbbb96d | 153 | const char *p; |
1249c513 | 154 | |
1da177e4 LT |
155 | if (dmi_ident[slot]) |
156 | return; | |
1249c513 | 157 | |
c3c7120d AP |
158 | p = dmi_string(dm, d[string]); |
159 | if (p == NULL) | |
160 | return; | |
161 | ||
162 | dmi_ident[slot] = p; | |
1da177e4 LT |
163 | } |
164 | ||
02d9c47f JD |
165 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, |
166 | int index) | |
4f5c791a | 167 | { |
02d9c47f | 168 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
169 | char *s; |
170 | int is_ff = 1, is_00 = 1, i; | |
171 | ||
172 | if (dmi_ident[slot]) | |
173 | return; | |
174 | ||
175 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
f1d8e614 ZD |
176 | if (d[i] != 0x00) |
177 | is_00 = 0; | |
178 | if (d[i] != 0xFF) | |
179 | is_ff = 0; | |
4f5c791a LP |
180 | } |
181 | ||
182 | if (is_ff || is_00) | |
183 | return; | |
184 | ||
185 | s = dmi_alloc(16*2+4+1); | |
186 | if (!s) | |
187 | return; | |
188 | ||
f1d8e614 ZD |
189 | /* |
190 | * As of version 2.6 of the SMBIOS specification, the first 3 fields of | |
191 | * the UUID are supposed to be little-endian encoded. The specification | |
192 | * says that this is the defacto standard. | |
193 | */ | |
194 | if (dmi_ver >= 0x0206) | |
195 | sprintf(s, "%pUL", d); | |
196 | else | |
197 | sprintf(s, "%pUB", d); | |
4f5c791a | 198 | |
02d9c47f | 199 | dmi_ident[slot] = s; |
4f5c791a LP |
200 | } |
201 | ||
02d9c47f JD |
202 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, |
203 | int index) | |
4f5c791a | 204 | { |
02d9c47f | 205 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
206 | char *s; |
207 | ||
208 | if (dmi_ident[slot]) | |
209 | return; | |
210 | ||
211 | s = dmi_alloc(4); | |
212 | if (!s) | |
213 | return; | |
214 | ||
215 | sprintf(s, "%u", *d & 0x7F); | |
216 | dmi_ident[slot] = s; | |
217 | } | |
218 | ||
f3069ae9 JD |
219 | static void __init dmi_save_one_device(int type, const char *name) |
220 | { | |
221 | struct dmi_device *dev; | |
222 | ||
223 | /* No duplicate device */ | |
224 | if (dmi_find_device(type, name, NULL)) | |
225 | return; | |
226 | ||
227 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
ae797449 | 228 | if (!dev) |
f3069ae9 | 229 | return; |
f3069ae9 JD |
230 | |
231 | dev->type = type; | |
232 | strcpy((char *)(dev + 1), name); | |
233 | dev->name = (char *)(dev + 1); | |
234 | dev->device_data = NULL; | |
235 | list_add(&dev->list, &dmi_devices); | |
236 | } | |
237 | ||
1855256c | 238 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
239 | { |
240 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
241 | |
242 | for (i = 0; i < count; i++) { | |
1855256c | 243 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
244 | |
245 | /* Skip disabled device */ | |
246 | if ((*d & 0x80) == 0) | |
247 | continue; | |
248 | ||
f3069ae9 | 249 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
250 | } |
251 | } | |
252 | ||
1855256c | 253 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
254 | { |
255 | int i, count = *(u8 *)(dm + 1); | |
256 | struct dmi_device *dev; | |
257 | ||
258 | for (i = 1; i <= count; i++) { | |
ffbbb96d | 259 | const char *devname = dmi_string(dm, i); |
79da4721 | 260 | |
43fe105a | 261 | if (devname == dmi_empty_string) |
79da4721 | 262 | continue; |
79da4721 | 263 | |
2e0c1f6c | 264 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 265 | if (!dev) |
2e0c1f6c | 266 | break; |
2e0c1f6c SM |
267 | |
268 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 269 | dev->name = devname; |
2e0c1f6c | 270 | dev->device_data = NULL; |
ebad6a42 AP |
271 | |
272 | list_add(&dev->list, &dmi_devices); | |
273 | } | |
274 | } | |
275 | ||
1855256c | 276 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
277 | { |
278 | struct dmi_device *dev; | |
02d9c47f | 279 | void *data; |
ebad6a42 | 280 | |
e9928674 | 281 | data = dmi_alloc(dm->length); |
ae797449 | 282 | if (data == NULL) |
ebad6a42 | 283 | return; |
ebad6a42 AP |
284 | |
285 | memcpy(data, dm, dm->length); | |
286 | ||
e9928674 | 287 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 288 | if (!dev) |
ebad6a42 | 289 | return; |
ebad6a42 AP |
290 | |
291 | dev->type = DMI_DEV_TYPE_IPMI; | |
292 | dev->name = "IPMI controller"; | |
293 | dev->device_data = data; | |
294 | ||
abd24df8 | 295 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
296 | } |
297 | ||
911e1c9b N |
298 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
299 | int devfn, const char *name) | |
300 | { | |
301 | struct dmi_dev_onboard *onboard_dev; | |
302 | ||
303 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
ae797449 | 304 | if (!onboard_dev) |
911e1c9b | 305 | return; |
ae797449 | 306 | |
911e1c9b N |
307 | onboard_dev->instance = instance; |
308 | onboard_dev->segment = segment; | |
309 | onboard_dev->bus = bus; | |
310 | onboard_dev->devfn = devfn; | |
311 | ||
312 | strcpy((char *)&onboard_dev[1], name); | |
313 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
314 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
315 | onboard_dev->dev.device_data = onboard_dev; | |
316 | ||
317 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
318 | } | |
319 | ||
b4bd7d59 WVS |
320 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
321 | { | |
02d9c47f | 322 | const u8 *d = (u8 *) dm + 5; |
b4bd7d59 WVS |
323 | |
324 | /* Skip disabled device */ | |
325 | if ((*d & 0x80) == 0) | |
326 | return; | |
327 | ||
911e1c9b N |
328 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
329 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 330 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
331 | } |
332 | ||
dd6dad42 CG |
333 | static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
334 | { | |
335 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
336 | return; | |
337 | dmi_memdev_nr++; | |
338 | } | |
339 | ||
340 | static void __init save_mem_devices(const struct dmi_header *dm, void *v) | |
341 | { | |
342 | const char *d = (const char *)dm; | |
343 | static int nr; | |
344 | ||
345 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
346 | return; | |
347 | if (nr >= dmi_memdev_nr) { | |
348 | pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); | |
349 | return; | |
350 | } | |
0841c04d | 351 | dmi_memdev[nr].handle = get_unaligned(&dm->handle); |
dd6dad42 CG |
352 | dmi_memdev[nr].device = dmi_string(dm, d[0x10]); |
353 | dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); | |
354 | nr++; | |
355 | } | |
356 | ||
357 | void __init dmi_memdev_walk(void) | |
358 | { | |
359 | if (!dmi_available) | |
360 | return; | |
361 | ||
362 | if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { | |
363 | dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); | |
364 | if (dmi_memdev) | |
365 | dmi_walk_early(save_mem_devices); | |
366 | } | |
367 | } | |
368 | ||
1da177e4 LT |
369 | /* |
370 | * Process a DMI table entry. Right now all we care about are the BIOS | |
371 | * and machine entries. For 2.5 we should pull the smbus controller info | |
372 | * out of here. | |
373 | */ | |
e7a19c56 | 374 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 375 | { |
02d9c47f | 376 | switch (dm->type) { |
ebad6a42 | 377 | case 0: /* BIOS Information */ |
1249c513 | 378 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 379 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
380 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
381 | break; | |
ebad6a42 | 382 | case 1: /* System Information */ |
1249c513 | 383 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 384 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 385 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 386 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 387 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 388 | break; |
ebad6a42 | 389 | case 2: /* Base Board Information */ |
1249c513 | 390 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 391 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 392 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
393 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
394 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
395 | break; | |
396 | case 3: /* Chassis Information */ | |
397 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
398 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
399 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
400 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
401 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 402 | break; |
ebad6a42 AP |
403 | case 10: /* Onboard Devices Information */ |
404 | dmi_save_devices(dm); | |
405 | break; | |
2e0c1f6c SM |
406 | case 11: /* OEM Strings */ |
407 | dmi_save_oem_strings_devices(dm); | |
408 | break; | |
ebad6a42 AP |
409 | case 38: /* IPMI Device Information */ |
410 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
411 | break; |
412 | case 41: /* Onboard Devices Extended Information */ | |
413 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
414 | } |
415 | } | |
416 | ||
c90fe6bc | 417 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 418 | { |
c90fe6bc | 419 | int c = 0; |
8881cdce BH |
420 | const char *p; |
421 | ||
422 | if (!info) | |
c90fe6bc | 423 | return c; |
8881cdce BH |
424 | |
425 | for (p = info; *p; p++) | |
426 | if (isprint(*p)) | |
c90fe6bc | 427 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 428 | else |
c90fe6bc TH |
429 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
430 | return c; | |
8881cdce BH |
431 | } |
432 | ||
c90fe6bc | 433 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 434 | { |
c90fe6bc | 435 | int c = 0; |
84e383b3 NC |
436 | const char *board; /* Board Name is optional */ |
437 | ||
c90fe6bc TH |
438 | c += print_filtered(buf + c, len - c, |
439 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
440 | c += scnprintf(buf + c, len - c, " "); | |
441 | c += print_filtered(buf + c, len - c, | |
442 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
443 | ||
84e383b3 NC |
444 | board = dmi_get_system_info(DMI_BOARD_NAME); |
445 | if (board) { | |
c90fe6bc TH |
446 | c += scnprintf(buf + c, len - c, "/"); |
447 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 448 | } |
c90fe6bc TH |
449 | c += scnprintf(buf + c, len - c, ", BIOS "); |
450 | c += print_filtered(buf + c, len - c, | |
451 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
452 | c += scnprintf(buf + c, len - c, " "); | |
453 | c += print_filtered(buf + c, len - c, | |
454 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
455 | } |
456 | ||
d39de28c BH |
457 | /* |
458 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
459 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
460 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
461 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
462 | * takes precedence) and return 0. Otherwise return 1. | |
463 | */ | |
79bae42d | 464 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 465 | { |
79bae42d | 466 | int smbios_ver; |
1855256c | 467 | |
79bae42d BH |
468 | if (memcmp(buf, "_SM_", 4) == 0 && |
469 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
470 | smbios_ver = (buf[6] << 8) + buf[7]; | |
471 | ||
472 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
473 | switch (smbios_ver) { | |
474 | case 0x021F: | |
475 | case 0x0221: | |
476 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", | |
477 | smbios_ver & 0xFF, 3); | |
478 | smbios_ver = 0x0203; | |
479 | break; | |
480 | case 0x0233: | |
481 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6); | |
482 | smbios_ver = 0x0206; | |
483 | break; | |
484 | } | |
485 | } else { | |
486 | smbios_ver = 0; | |
487 | } | |
488 | ||
489 | buf += 16; | |
490 | ||
491 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
7fce084a JD |
492 | dmi_num = (buf[13] << 8) | buf[12]; |
493 | dmi_len = (buf[7] << 8) | buf[6]; | |
494 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 495 | (buf[9] << 8) | buf[8]; |
61e032fa | 496 | |
8881cdce | 497 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d BH |
498 | if (smbios_ver) { |
499 | dmi_ver = smbios_ver; | |
9f9c9cbb ZD |
500 | pr_info("SMBIOS %d.%d present.\n", |
501 | dmi_ver >> 8, dmi_ver & 0xFF); | |
79bae42d | 502 | } else { |
9f9c9cbb ZD |
503 | dmi_ver = (buf[14] & 0xF0) << 4 | |
504 | (buf[14] & 0x0F); | |
505 | pr_info("Legacy DMI %d.%d present.\n", | |
506 | dmi_ver >> 8, dmi_ver & 0xFF); | |
507 | } | |
c90fe6bc TH |
508 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
509 | printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); | |
3ed3bce8 | 510 | return 0; |
8881cdce | 511 | } |
3ed3bce8 | 512 | } |
61e032fa | 513 | |
a40e7cf8 | 514 | return 1; |
9f9c9cbb ZD |
515 | } |
516 | ||
3ed3bce8 MD |
517 | void __init dmi_scan_machine(void) |
518 | { | |
519 | char __iomem *p, *q; | |
79bae42d | 520 | char buf[32]; |
3ed3bce8 | 521 | |
83e68189 | 522 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 523 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 524 | goto error; |
3ed3bce8 | 525 | |
4f5c791a LP |
526 | /* This is called as a core_initcall() because it isn't |
527 | * needed during early boot. This also means we can | |
528 | * iounmap the space when we're done with it. | |
529 | */ | |
cf074402 | 530 | p = dmi_early_remap(efi.smbios, 32); |
3ed3bce8 | 531 | if (p == NULL) |
9a22b6e7 | 532 | goto error; |
79bae42d | 533 | memcpy_fromio(buf, p, 32); |
cf074402 | 534 | dmi_early_unmap(p, 32); |
79bae42d BH |
535 | |
536 | if (!dmi_present(buf)) { | |
4f5c791a | 537 | dmi_available = 1; |
9a22b6e7 | 538 | goto out; |
4f5c791a | 539 | } |
cf074402 AB |
540 | } else if (IS_ENABLED(CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK)) { |
541 | p = dmi_early_remap(0xF0000, 0x10000); | |
3ed3bce8 | 542 | if (p == NULL) |
9a22b6e7 | 543 | goto error; |
3ed3bce8 | 544 | |
d39de28c BH |
545 | /* |
546 | * Iterate over all possible DMI header addresses q. | |
547 | * Maintain the 32 bytes around q in buf. On the | |
548 | * first iteration, substitute zero for the | |
549 | * out-of-range bytes so there is no chance of falsely | |
550 | * detecting an SMBIOS header. | |
551 | */ | |
79bae42d | 552 | memset(buf, 0, 16); |
3ed3bce8 | 553 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d BH |
554 | memcpy_fromio(buf + 16, q, 16); |
555 | if (!dmi_present(buf)) { | |
4f5c791a | 556 | dmi_available = 1; |
cf074402 | 557 | dmi_early_unmap(p, 0x10000); |
9a22b6e7 | 558 | goto out; |
4f5c791a | 559 | } |
79bae42d | 560 | memcpy(buf, buf + 16, 16); |
61e032fa | 561 | } |
cf074402 | 562 | dmi_early_unmap(p, 0x10000); |
61e032fa | 563 | } |
9a22b6e7 | 564 | error: |
02d9c47f | 565 | pr_info("DMI not present or invalid.\n"); |
9a22b6e7 IM |
566 | out: |
567 | dmi_initialized = 1; | |
1da177e4 LT |
568 | } |
569 | ||
98e5e1bf TH |
570 | /** |
571 | * dmi_set_dump_stack_arch_desc - set arch description for dump_stack() | |
572 | * | |
573 | * Invoke dump_stack_set_arch_desc() with DMI system information so that | |
574 | * DMI identifiers are printed out on task dumps. Arch boot code should | |
575 | * call this function after dmi_scan_machine() if it wants to print out DMI | |
576 | * identifiers on task dumps. | |
577 | */ | |
578 | void __init dmi_set_dump_stack_arch_desc(void) | |
579 | { | |
580 | dump_stack_set_arch_desc("%s", dmi_ids_string); | |
581 | } | |
582 | ||
d7b1956f RW |
583 | /** |
584 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
585 | * @dmi: pointer to the dmi_system_id structure to check | |
586 | */ | |
587 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
588 | { | |
589 | int i; | |
590 | ||
591 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
592 | ||
593 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
594 | int s = dmi->matches[i].slot; | |
595 | if (s == DMI_NONE) | |
75757507 | 596 | break; |
5017b285 JN |
597 | if (dmi_ident[s]) { |
598 | if (!dmi->matches[i].exact_match && | |
599 | strstr(dmi_ident[s], dmi->matches[i].substr)) | |
600 | continue; | |
601 | else if (dmi->matches[i].exact_match && | |
602 | !strcmp(dmi_ident[s], dmi->matches[i].substr)) | |
603 | continue; | |
604 | } | |
605 | ||
d7b1956f RW |
606 | /* No match */ |
607 | return false; | |
608 | } | |
609 | return true; | |
610 | } | |
611 | ||
75757507 DT |
612 | /** |
613 | * dmi_is_end_of_table - check for end-of-table marker | |
614 | * @dmi: pointer to the dmi_system_id structure to check | |
615 | */ | |
616 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
617 | { | |
618 | return dmi->matches[0].slot == DMI_NONE; | |
619 | } | |
620 | ||
1da177e4 LT |
621 | /** |
622 | * dmi_check_system - check system DMI data | |
623 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
624 | * All non-null elements of the list must match |
625 | * their slot's (field index's) data (i.e., each | |
626 | * list string must be a substring of the specified | |
627 | * DMI slot's string data) to be considered a | |
628 | * successful match. | |
1da177e4 LT |
629 | * |
630 | * Walk the blacklist table running matching functions until someone | |
631 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 632 | * each successful match. Returns the number of matches. |
1da177e4 | 633 | */ |
1855256c | 634 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 635 | { |
d7b1956f RW |
636 | int count = 0; |
637 | const struct dmi_system_id *d; | |
638 | ||
75757507 | 639 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
640 | if (dmi_matches(d)) { |
641 | count++; | |
642 | if (d->callback && d->callback(d)) | |
643 | break; | |
1da177e4 | 644 | } |
1da177e4 LT |
645 | |
646 | return count; | |
647 | } | |
1da177e4 LT |
648 | EXPORT_SYMBOL(dmi_check_system); |
649 | ||
d7b1956f RW |
650 | /** |
651 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
652 | * @list: array of dmi_system_id structures to match against | |
653 | * All non-null elements of the list must match | |
654 | * their slot's (field index's) data (i.e., each | |
655 | * list string must be a substring of the specified | |
656 | * DMI slot's string data) to be considered a | |
657 | * successful match. | |
658 | * | |
659 | * Walk the blacklist table until the first match is found. Return the | |
660 | * pointer to the matching entry or NULL if there's no match. | |
661 | */ | |
662 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
663 | { | |
664 | const struct dmi_system_id *d; | |
665 | ||
75757507 | 666 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
667 | if (dmi_matches(d)) |
668 | return d; | |
669 | ||
670 | return NULL; | |
671 | } | |
672 | EXPORT_SYMBOL(dmi_first_match); | |
673 | ||
1da177e4 LT |
674 | /** |
675 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 676 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
677 | * |
678 | * Returns one DMI data value, can be used to perform | |
679 | * complex DMI data checks. | |
680 | */ | |
1855256c | 681 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
682 | { |
683 | return dmi_ident[field]; | |
684 | } | |
e70c9d5e | 685 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 686 | |
fd8cd7e1 | 687 | /** |
c2bacfc4 RD |
688 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
689 | * @str: string to check for | |
fd8cd7e1 AK |
690 | */ |
691 | int dmi_name_in_serial(const char *str) | |
692 | { | |
693 | int f = DMI_PRODUCT_SERIAL; | |
694 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
695 | return 1; | |
696 | return 0; | |
697 | } | |
a1bae672 AK |
698 | |
699 | /** | |
66e13e66 | 700 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
02d9c47f | 701 | * @str: Case sensitive Name |
a1bae672 | 702 | */ |
1855256c | 703 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 704 | { |
66e13e66 | 705 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
706 | int i; |
707 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
708 | int f = fields[i]; | |
709 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
710 | return 1; | |
711 | } | |
712 | return 0; | |
713 | } | |
714 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
715 | ||
ebad6a42 AP |
716 | /** |
717 | * dmi_find_device - find onboard device by type/name | |
718 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 719 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
720 | * @from: previous device found in search, or %NULL for new search. |
721 | * | |
722 | * Iterates through the list of known onboard devices. If a device is | |
723 | * found with a matching @vendor and @device, a pointer to its device | |
724 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 725 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
726 | * If @from is not %NULL, searches continue from next device. |
727 | */ | |
02d9c47f | 728 | const struct dmi_device *dmi_find_device(int type, const char *name, |
1855256c | 729 | const struct dmi_device *from) |
ebad6a42 | 730 | { |
1855256c JG |
731 | const struct list_head *head = from ? &from->list : &dmi_devices; |
732 | struct list_head *d; | |
ebad6a42 | 733 | |
02d9c47f | 734 | for (d = head->next; d != &dmi_devices; d = d->next) { |
1855256c JG |
735 | const struct dmi_device *dev = |
736 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
737 | |
738 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
739 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
740 | return dev; | |
741 | } | |
742 | ||
743 | return NULL; | |
744 | } | |
745 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
746 | |
747 | /** | |
3e5cd1f2 TH |
748 | * dmi_get_date - parse a DMI date |
749 | * @field: data index (see enum dmi_field) | |
750 | * @yearp: optional out parameter for the year | |
751 | * @monthp: optional out parameter for the month | |
752 | * @dayp: optional out parameter for the day | |
f083a329 | 753 | * |
3e5cd1f2 TH |
754 | * The date field is assumed to be in the form resembling |
755 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
756 | * parameters any or all of which can be omitted. | |
757 | * | |
758 | * If the field doesn't exist, all out parameters are set to zero | |
759 | * and false is returned. Otherwise, true is returned with any | |
760 | * invalid part of date set to zero. | |
761 | * | |
762 | * On return, year, month and day are guaranteed to be in the | |
763 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 764 | */ |
3e5cd1f2 | 765 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 766 | { |
3e5cd1f2 TH |
767 | int year = 0, month = 0, day = 0; |
768 | bool exists; | |
769 | const char *s, *y; | |
02c24fa8 | 770 | char *e; |
f083a329 | 771 | |
3e5cd1f2 TH |
772 | s = dmi_get_system_info(field); |
773 | exists = s; | |
774 | if (!exists) | |
775 | goto out; | |
f083a329 | 776 | |
3e5cd1f2 TH |
777 | /* |
778 | * Determine year first. We assume the date string resembles | |
779 | * mm/dd/yy[yy] but the original code extracted only the year | |
780 | * from the end. Keep the behavior in the spirit of no | |
781 | * surprises. | |
782 | */ | |
783 | y = strrchr(s, '/'); | |
784 | if (!y) | |
785 | goto out; | |
786 | ||
787 | y++; | |
788 | year = simple_strtoul(y, &e, 10); | |
789 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
790 | year += 1900; |
791 | if (year < 1996) /* no dates < spec 1.0 */ | |
792 | year += 100; | |
793 | } | |
3e5cd1f2 TH |
794 | if (year > 9999) /* year should fit in %04d */ |
795 | year = 0; | |
796 | ||
797 | /* parse the mm and dd */ | |
798 | month = simple_strtoul(s, &e, 10); | |
799 | if (s == e || *e != '/' || !month || month > 12) { | |
800 | month = 0; | |
801 | goto out; | |
802 | } | |
f083a329 | 803 | |
3e5cd1f2 TH |
804 | s = e + 1; |
805 | day = simple_strtoul(s, &e, 10); | |
806 | if (s == y || s == e || *e != '/' || day > 31) | |
807 | day = 0; | |
808 | out: | |
809 | if (yearp) | |
810 | *yearp = year; | |
811 | if (monthp) | |
812 | *monthp = month; | |
813 | if (dayp) | |
814 | *dayp = day; | |
815 | return exists; | |
f083a329 | 816 | } |
3e5cd1f2 | 817 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
818 | |
819 | /** | |
820 | * dmi_walk - Walk the DMI table and get called back for every record | |
821 | * @decode: Callback function | |
e7a19c56 | 822 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
823 | * |
824 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
825 | */ | |
e7a19c56 JD |
826 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
827 | void *private_data) | |
7fce084a JD |
828 | { |
829 | u8 *buf; | |
830 | ||
831 | if (!dmi_available) | |
832 | return -1; | |
833 | ||
cf074402 | 834 | buf = dmi_remap(dmi_base, dmi_len); |
7fce084a JD |
835 | if (buf == NULL) |
836 | return -1; | |
837 | ||
e7a19c56 | 838 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a | 839 | |
cf074402 | 840 | dmi_unmap(buf); |
7fce084a JD |
841 | return 0; |
842 | } | |
843 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
844 | |
845 | /** | |
846 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
847 | * @f: DMI field identifier |
848 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
849 | * |
850 | * Returns true if the requested field equals to the str (including NULL). | |
851 | */ | |
852 | bool dmi_match(enum dmi_field f, const char *str) | |
853 | { | |
854 | const char *info = dmi_get_system_info(f); | |
855 | ||
856 | if (info == NULL || str == NULL) | |
857 | return info == str; | |
858 | ||
859 | return !strcmp(info, str); | |
860 | } | |
861 | EXPORT_SYMBOL_GPL(dmi_match); | |
dd6dad42 CG |
862 | |
863 | void dmi_memdev_name(u16 handle, const char **bank, const char **device) | |
864 | { | |
865 | int n; | |
866 | ||
867 | if (dmi_memdev == NULL) | |
868 | return; | |
869 | ||
870 | for (n = 0; n < dmi_memdev_nr; n++) { | |
871 | if (handle == dmi_memdev[n].handle) { | |
872 | *bank = dmi_memdev[n].bank; | |
873 | *device = dmi_memdev[n].device; | |
874 | break; | |
875 | } | |
876 | } | |
877 | } | |
878 | EXPORT_SYMBOL_GPL(dmi_memdev_name); |