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 | */ | |
ffbbb96d | 17 | static const char dmi_empty_string[] = " "; |
79da4721 | 18 | |
f1d8e614 | 19 | static u16 __initdata dmi_ver; |
9a22b6e7 IM |
20 | /* |
21 | * Catch too early calls to dmi_check_system(): | |
22 | */ | |
23 | static int dmi_initialized; | |
24 | ||
c90fe6bc TH |
25 | /* DMI system identification string used during boot */ |
26 | static char dmi_ids_string[128] __initdata; | |
27 | ||
dd6dad42 CG |
28 | static struct dmi_memdev_info { |
29 | const char *device; | |
30 | const char *bank; | |
31 | u16 handle; | |
32 | } *dmi_memdev; | |
33 | static int dmi_memdev_nr; | |
34 | ||
f3069ae9 | 35 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 36 | { |
1855256c | 37 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 38 | |
c3c7120d | 39 | if (s) { |
1da177e4 | 40 | s--; |
c3c7120d AP |
41 | while (s > 0 && *bp) { |
42 | bp += strlen(bp) + 1; | |
43 | s--; | |
44 | } | |
45 | ||
46 | if (*bp != 0) { | |
79da4721 PW |
47 | size_t len = strlen(bp)+1; |
48 | size_t cmp_len = len > 8 ? 8 : len; | |
49 | ||
50 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
51 | return dmi_empty_string; | |
f3069ae9 | 52 | return bp; |
c3c7120d | 53 | } |
4f705ae3 | 54 | } |
c3c7120d | 55 | |
f3069ae9 JD |
56 | return ""; |
57 | } | |
58 | ||
ffbbb96d | 59 | static const char * __init dmi_string(const struct dmi_header *dm, u8 s) |
f3069ae9 JD |
60 | { |
61 | const char *bp = dmi_string_nosave(dm, s); | |
62 | char *str; | |
63 | size_t len; | |
64 | ||
65 | if (bp == dmi_empty_string) | |
66 | return dmi_empty_string; | |
67 | ||
68 | len = strlen(bp) + 1; | |
69 | str = dmi_alloc(len); | |
70 | if (str != NULL) | |
71 | strcpy(str, bp); | |
f3069ae9 | 72 | |
c3c7120d | 73 | return str; |
1da177e4 LT |
74 | } |
75 | ||
76 | /* | |
77 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
78 | * pointing to completely the wrong place for example | |
79 | */ | |
7fce084a | 80 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
81 | void (*decode)(const struct dmi_header *, void *), |
82 | void *private_data) | |
1da177e4 | 83 | { |
7fce084a | 84 | u8 *data = buf; |
1249c513 | 85 | int i = 0; |
4f705ae3 | 86 | |
1da177e4 | 87 | /* |
4f705ae3 BH |
88 | * Stop when we see all the items the table claimed to have |
89 | * OR we run off the end of the table (also happens) | |
90 | */ | |
1249c513 | 91 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
92 | const struct dmi_header *dm = (const struct dmi_header *)data; |
93 | ||
1da177e4 | 94 | /* |
8638545c AC |
95 | * We want to know the total length (formatted area and |
96 | * strings) before decoding to make sure we won't run off the | |
97 | * table in dmi_decode or dmi_string | |
1da177e4 | 98 | */ |
1249c513 AP |
99 | data += dm->length; |
100 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 101 | data++; |
1249c513 | 102 | if (data - buf < len - 1) |
e7a19c56 | 103 | decode(dm, private_data); |
1249c513 | 104 | data += 2; |
1da177e4 LT |
105 | i++; |
106 | } | |
7fce084a JD |
107 | } |
108 | ||
109 | static u32 dmi_base; | |
110 | static u16 dmi_len; | |
111 | static u16 dmi_num; | |
112 | ||
e7a19c56 JD |
113 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
114 | void *)) | |
7fce084a JD |
115 | { |
116 | u8 *buf; | |
117 | ||
118 | buf = dmi_ioremap(dmi_base, dmi_len); | |
119 | if (buf == NULL) | |
120 | return -1; | |
121 | ||
e7a19c56 | 122 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 123 | |
d114a333 TL |
124 | add_device_randomness(buf, dmi_len); |
125 | ||
7fce084a | 126 | dmi_iounmap(buf, dmi_len); |
1da177e4 LT |
127 | return 0; |
128 | } | |
129 | ||
9f9c9cbb | 130 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 131 | { |
1249c513 | 132 | u8 sum = 0; |
1da177e4 | 133 | int a; |
4f705ae3 | 134 | |
9f9c9cbb | 135 | for (a = 0; a < len; a++) |
1249c513 AP |
136 | sum += buf[a]; |
137 | ||
138 | return sum == 0; | |
1da177e4 LT |
139 | } |
140 | ||
ffbbb96d | 141 | static const char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 142 | static LIST_HEAD(dmi_devices); |
4f5c791a | 143 | int dmi_available; |
1da177e4 LT |
144 | |
145 | /* | |
146 | * Save a DMI string | |
147 | */ | |
02d9c47f JD |
148 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, |
149 | int string) | |
1da177e4 | 150 | { |
02d9c47f | 151 | const char *d = (const char *) dm; |
ffbbb96d | 152 | const char *p; |
1249c513 | 153 | |
1da177e4 LT |
154 | if (dmi_ident[slot]) |
155 | return; | |
1249c513 | 156 | |
c3c7120d AP |
157 | p = dmi_string(dm, d[string]); |
158 | if (p == NULL) | |
159 | return; | |
160 | ||
161 | dmi_ident[slot] = p; | |
1da177e4 LT |
162 | } |
163 | ||
02d9c47f JD |
164 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, |
165 | int index) | |
4f5c791a | 166 | { |
02d9c47f | 167 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
168 | char *s; |
169 | int is_ff = 1, is_00 = 1, i; | |
170 | ||
171 | if (dmi_ident[slot]) | |
172 | return; | |
173 | ||
174 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
f1d8e614 ZD |
175 | if (d[i] != 0x00) |
176 | is_00 = 0; | |
177 | if (d[i] != 0xFF) | |
178 | is_ff = 0; | |
4f5c791a LP |
179 | } |
180 | ||
181 | if (is_ff || is_00) | |
182 | return; | |
183 | ||
184 | s = dmi_alloc(16*2+4+1); | |
185 | if (!s) | |
186 | return; | |
187 | ||
f1d8e614 ZD |
188 | /* |
189 | * As of version 2.6 of the SMBIOS specification, the first 3 fields of | |
190 | * the UUID are supposed to be little-endian encoded. The specification | |
191 | * says that this is the defacto standard. | |
192 | */ | |
193 | if (dmi_ver >= 0x0206) | |
194 | sprintf(s, "%pUL", d); | |
195 | else | |
196 | sprintf(s, "%pUB", d); | |
4f5c791a | 197 | |
02d9c47f | 198 | dmi_ident[slot] = s; |
4f5c791a LP |
199 | } |
200 | ||
02d9c47f JD |
201 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, |
202 | int index) | |
4f5c791a | 203 | { |
02d9c47f | 204 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
205 | char *s; |
206 | ||
207 | if (dmi_ident[slot]) | |
208 | return; | |
209 | ||
210 | s = dmi_alloc(4); | |
211 | if (!s) | |
212 | return; | |
213 | ||
214 | sprintf(s, "%u", *d & 0x7F); | |
215 | dmi_ident[slot] = s; | |
216 | } | |
217 | ||
f3069ae9 JD |
218 | static void __init dmi_save_one_device(int type, const char *name) |
219 | { | |
220 | struct dmi_device *dev; | |
221 | ||
222 | /* No duplicate device */ | |
223 | if (dmi_find_device(type, name, NULL)) | |
224 | return; | |
225 | ||
226 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
ae797449 | 227 | if (!dev) |
f3069ae9 | 228 | return; |
f3069ae9 JD |
229 | |
230 | dev->type = type; | |
231 | strcpy((char *)(dev + 1), name); | |
232 | dev->name = (char *)(dev + 1); | |
233 | dev->device_data = NULL; | |
234 | list_add(&dev->list, &dmi_devices); | |
235 | } | |
236 | ||
1855256c | 237 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
238 | { |
239 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
240 | |
241 | for (i = 0; i < count; i++) { | |
1855256c | 242 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
243 | |
244 | /* Skip disabled device */ | |
245 | if ((*d & 0x80) == 0) | |
246 | continue; | |
247 | ||
f3069ae9 | 248 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
249 | } |
250 | } | |
251 | ||
1855256c | 252 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
253 | { |
254 | int i, count = *(u8 *)(dm + 1); | |
255 | struct dmi_device *dev; | |
256 | ||
257 | for (i = 1; i <= count; i++) { | |
ffbbb96d | 258 | const char *devname = dmi_string(dm, i); |
79da4721 | 259 | |
43fe105a | 260 | if (devname == dmi_empty_string) |
79da4721 | 261 | continue; |
79da4721 | 262 | |
2e0c1f6c | 263 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 264 | if (!dev) |
2e0c1f6c | 265 | break; |
2e0c1f6c SM |
266 | |
267 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 268 | dev->name = devname; |
2e0c1f6c | 269 | dev->device_data = NULL; |
ebad6a42 AP |
270 | |
271 | list_add(&dev->list, &dmi_devices); | |
272 | } | |
273 | } | |
274 | ||
1855256c | 275 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
276 | { |
277 | struct dmi_device *dev; | |
02d9c47f | 278 | void *data; |
ebad6a42 | 279 | |
e9928674 | 280 | data = dmi_alloc(dm->length); |
ae797449 | 281 | if (data == NULL) |
ebad6a42 | 282 | return; |
ebad6a42 AP |
283 | |
284 | memcpy(data, dm, dm->length); | |
285 | ||
e9928674 | 286 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 287 | if (!dev) |
ebad6a42 | 288 | return; |
ebad6a42 AP |
289 | |
290 | dev->type = DMI_DEV_TYPE_IPMI; | |
291 | dev->name = "IPMI controller"; | |
292 | dev->device_data = data; | |
293 | ||
abd24df8 | 294 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
295 | } |
296 | ||
911e1c9b N |
297 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
298 | int devfn, const char *name) | |
299 | { | |
300 | struct dmi_dev_onboard *onboard_dev; | |
301 | ||
302 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
ae797449 | 303 | if (!onboard_dev) |
911e1c9b | 304 | return; |
ae797449 | 305 | |
911e1c9b N |
306 | onboard_dev->instance = instance; |
307 | onboard_dev->segment = segment; | |
308 | onboard_dev->bus = bus; | |
309 | onboard_dev->devfn = devfn; | |
310 | ||
311 | strcpy((char *)&onboard_dev[1], name); | |
312 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
313 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
314 | onboard_dev->dev.device_data = onboard_dev; | |
315 | ||
316 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
317 | } | |
318 | ||
b4bd7d59 WVS |
319 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
320 | { | |
02d9c47f | 321 | const u8 *d = (u8 *) dm + 5; |
b4bd7d59 WVS |
322 | |
323 | /* Skip disabled device */ | |
324 | if ((*d & 0x80) == 0) | |
325 | return; | |
326 | ||
911e1c9b N |
327 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
328 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 329 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
330 | } |
331 | ||
dd6dad42 CG |
332 | static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
333 | { | |
334 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
335 | return; | |
336 | dmi_memdev_nr++; | |
337 | } | |
338 | ||
339 | static void __init save_mem_devices(const struct dmi_header *dm, void *v) | |
340 | { | |
341 | const char *d = (const char *)dm; | |
342 | static int nr; | |
343 | ||
344 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
345 | return; | |
346 | if (nr >= dmi_memdev_nr) { | |
347 | pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); | |
348 | return; | |
349 | } | |
350 | dmi_memdev[nr].handle = dm->handle; | |
351 | dmi_memdev[nr].device = dmi_string(dm, d[0x10]); | |
352 | dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); | |
353 | nr++; | |
354 | } | |
355 | ||
356 | void __init dmi_memdev_walk(void) | |
357 | { | |
358 | if (!dmi_available) | |
359 | return; | |
360 | ||
361 | if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { | |
362 | dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); | |
363 | if (dmi_memdev) | |
364 | dmi_walk_early(save_mem_devices); | |
365 | } | |
366 | } | |
367 | ||
1da177e4 LT |
368 | /* |
369 | * Process a DMI table entry. Right now all we care about are the BIOS | |
370 | * and machine entries. For 2.5 we should pull the smbus controller info | |
371 | * out of here. | |
372 | */ | |
e7a19c56 | 373 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 374 | { |
02d9c47f | 375 | switch (dm->type) { |
ebad6a42 | 376 | case 0: /* BIOS Information */ |
1249c513 | 377 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 378 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
379 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
380 | break; | |
ebad6a42 | 381 | case 1: /* System Information */ |
1249c513 | 382 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 383 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 384 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 385 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 386 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 387 | break; |
ebad6a42 | 388 | case 2: /* Base Board Information */ |
1249c513 | 389 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 390 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 391 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
392 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
393 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
394 | break; | |
395 | case 3: /* Chassis Information */ | |
396 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
397 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
398 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
399 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
400 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 401 | break; |
ebad6a42 AP |
402 | case 10: /* Onboard Devices Information */ |
403 | dmi_save_devices(dm); | |
404 | break; | |
2e0c1f6c SM |
405 | case 11: /* OEM Strings */ |
406 | dmi_save_oem_strings_devices(dm); | |
407 | break; | |
ebad6a42 AP |
408 | case 38: /* IPMI Device Information */ |
409 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
410 | break; |
411 | case 41: /* Onboard Devices Extended Information */ | |
412 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
413 | } |
414 | } | |
415 | ||
c90fe6bc | 416 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 417 | { |
c90fe6bc | 418 | int c = 0; |
8881cdce BH |
419 | const char *p; |
420 | ||
421 | if (!info) | |
c90fe6bc | 422 | return c; |
8881cdce BH |
423 | |
424 | for (p = info; *p; p++) | |
425 | if (isprint(*p)) | |
c90fe6bc | 426 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 427 | else |
c90fe6bc TH |
428 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
429 | return c; | |
8881cdce BH |
430 | } |
431 | ||
c90fe6bc | 432 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 433 | { |
c90fe6bc | 434 | int c = 0; |
84e383b3 NC |
435 | const char *board; /* Board Name is optional */ |
436 | ||
c90fe6bc TH |
437 | c += print_filtered(buf + c, len - c, |
438 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
439 | c += scnprintf(buf + c, len - c, " "); | |
440 | c += print_filtered(buf + c, len - c, | |
441 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
442 | ||
84e383b3 NC |
443 | board = dmi_get_system_info(DMI_BOARD_NAME); |
444 | if (board) { | |
c90fe6bc TH |
445 | c += scnprintf(buf + c, len - c, "/"); |
446 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 447 | } |
c90fe6bc TH |
448 | c += scnprintf(buf + c, len - c, ", BIOS "); |
449 | c += print_filtered(buf + c, len - c, | |
450 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
451 | c += scnprintf(buf + c, len - c, " "); | |
452 | c += print_filtered(buf + c, len - c, | |
453 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
454 | } |
455 | ||
d39de28c BH |
456 | /* |
457 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
458 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
459 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
460 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
461 | * takes precedence) and return 0. Otherwise return 1. | |
462 | */ | |
79bae42d | 463 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 464 | { |
79bae42d | 465 | int smbios_ver; |
1855256c | 466 | |
79bae42d BH |
467 | if (memcmp(buf, "_SM_", 4) == 0 && |
468 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
469 | smbios_ver = (buf[6] << 8) + buf[7]; | |
470 | ||
471 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
472 | switch (smbios_ver) { | |
473 | case 0x021F: | |
474 | case 0x0221: | |
475 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", | |
476 | smbios_ver & 0xFF, 3); | |
477 | smbios_ver = 0x0203; | |
478 | break; | |
479 | case 0x0233: | |
480 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6); | |
481 | smbios_ver = 0x0206; | |
482 | break; | |
483 | } | |
484 | } else { | |
485 | smbios_ver = 0; | |
486 | } | |
487 | ||
488 | buf += 16; | |
489 | ||
490 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
7fce084a JD |
491 | dmi_num = (buf[13] << 8) | buf[12]; |
492 | dmi_len = (buf[7] << 8) | buf[6]; | |
493 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 494 | (buf[9] << 8) | buf[8]; |
61e032fa | 495 | |
8881cdce | 496 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d BH |
497 | if (smbios_ver) { |
498 | dmi_ver = smbios_ver; | |
9f9c9cbb ZD |
499 | pr_info("SMBIOS %d.%d present.\n", |
500 | dmi_ver >> 8, dmi_ver & 0xFF); | |
79bae42d | 501 | } else { |
9f9c9cbb ZD |
502 | dmi_ver = (buf[14] & 0xF0) << 4 | |
503 | (buf[14] & 0x0F); | |
504 | pr_info("Legacy DMI %d.%d present.\n", | |
505 | dmi_ver >> 8, dmi_ver & 0xFF); | |
506 | } | |
c90fe6bc TH |
507 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
508 | printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); | |
3ed3bce8 | 509 | return 0; |
8881cdce | 510 | } |
3ed3bce8 | 511 | } |
61e032fa | 512 | |
a40e7cf8 | 513 | return 1; |
9f9c9cbb ZD |
514 | } |
515 | ||
3ed3bce8 MD |
516 | void __init dmi_scan_machine(void) |
517 | { | |
518 | char __iomem *p, *q; | |
79bae42d | 519 | char buf[32]; |
3ed3bce8 | 520 | |
83e68189 | 521 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 522 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 523 | goto error; |
3ed3bce8 | 524 | |
4f5c791a LP |
525 | /* This is called as a core_initcall() because it isn't |
526 | * needed during early boot. This also means we can | |
527 | * iounmap the space when we're done with it. | |
528 | */ | |
b2c99e3c | 529 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 530 | if (p == NULL) |
9a22b6e7 | 531 | goto error; |
79bae42d | 532 | memcpy_fromio(buf, p, 32); |
23dd842c | 533 | dmi_iounmap(p, 32); |
79bae42d BH |
534 | |
535 | if (!dmi_present(buf)) { | |
4f5c791a | 536 | dmi_available = 1; |
9a22b6e7 | 537 | goto out; |
4f5c791a | 538 | } |
02d9c47f | 539 | } else { |
3ed3bce8 MD |
540 | p = dmi_ioremap(0xF0000, 0x10000); |
541 | if (p == NULL) | |
9a22b6e7 | 542 | goto error; |
3ed3bce8 | 543 | |
d39de28c BH |
544 | /* |
545 | * Iterate over all possible DMI header addresses q. | |
546 | * Maintain the 32 bytes around q in buf. On the | |
547 | * first iteration, substitute zero for the | |
548 | * out-of-range bytes so there is no chance of falsely | |
549 | * detecting an SMBIOS header. | |
550 | */ | |
79bae42d | 551 | memset(buf, 0, 16); |
3ed3bce8 | 552 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d BH |
553 | memcpy_fromio(buf + 16, q, 16); |
554 | if (!dmi_present(buf)) { | |
4f5c791a | 555 | dmi_available = 1; |
0d64484f | 556 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 557 | goto out; |
4f5c791a | 558 | } |
79bae42d | 559 | memcpy(buf, buf + 16, 16); |
61e032fa | 560 | } |
3212bff3 | 561 | dmi_iounmap(p, 0x10000); |
61e032fa | 562 | } |
9a22b6e7 | 563 | error: |
02d9c47f | 564 | pr_info("DMI not present or invalid.\n"); |
9a22b6e7 IM |
565 | out: |
566 | dmi_initialized = 1; | |
1da177e4 LT |
567 | } |
568 | ||
98e5e1bf TH |
569 | /** |
570 | * dmi_set_dump_stack_arch_desc - set arch description for dump_stack() | |
571 | * | |
572 | * Invoke dump_stack_set_arch_desc() with DMI system information so that | |
573 | * DMI identifiers are printed out on task dumps. Arch boot code should | |
574 | * call this function after dmi_scan_machine() if it wants to print out DMI | |
575 | * identifiers on task dumps. | |
576 | */ | |
577 | void __init dmi_set_dump_stack_arch_desc(void) | |
578 | { | |
579 | dump_stack_set_arch_desc("%s", dmi_ids_string); | |
580 | } | |
581 | ||
d7b1956f RW |
582 | /** |
583 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
584 | * @dmi: pointer to the dmi_system_id structure to check | |
585 | */ | |
586 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
587 | { | |
588 | int i; | |
589 | ||
590 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
591 | ||
592 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
593 | int s = dmi->matches[i].slot; | |
594 | if (s == DMI_NONE) | |
75757507 | 595 | break; |
5017b285 JN |
596 | if (dmi_ident[s]) { |
597 | if (!dmi->matches[i].exact_match && | |
598 | strstr(dmi_ident[s], dmi->matches[i].substr)) | |
599 | continue; | |
600 | else if (dmi->matches[i].exact_match && | |
601 | !strcmp(dmi_ident[s], dmi->matches[i].substr)) | |
602 | continue; | |
603 | } | |
604 | ||
d7b1956f RW |
605 | /* No match */ |
606 | return false; | |
607 | } | |
608 | return true; | |
609 | } | |
610 | ||
75757507 DT |
611 | /** |
612 | * dmi_is_end_of_table - check for end-of-table marker | |
613 | * @dmi: pointer to the dmi_system_id structure to check | |
614 | */ | |
615 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
616 | { | |
617 | return dmi->matches[0].slot == DMI_NONE; | |
618 | } | |
619 | ||
1da177e4 LT |
620 | /** |
621 | * dmi_check_system - check system DMI data | |
622 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
623 | * All non-null elements of the list must match |
624 | * their slot's (field index's) data (i.e., each | |
625 | * list string must be a substring of the specified | |
626 | * DMI slot's string data) to be considered a | |
627 | * successful match. | |
1da177e4 LT |
628 | * |
629 | * Walk the blacklist table running matching functions until someone | |
630 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 631 | * each successful match. Returns the number of matches. |
1da177e4 | 632 | */ |
1855256c | 633 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 634 | { |
d7b1956f RW |
635 | int count = 0; |
636 | const struct dmi_system_id *d; | |
637 | ||
75757507 | 638 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
639 | if (dmi_matches(d)) { |
640 | count++; | |
641 | if (d->callback && d->callback(d)) | |
642 | break; | |
1da177e4 | 643 | } |
1da177e4 LT |
644 | |
645 | return count; | |
646 | } | |
1da177e4 LT |
647 | EXPORT_SYMBOL(dmi_check_system); |
648 | ||
d7b1956f RW |
649 | /** |
650 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
651 | * @list: array of dmi_system_id structures to match against | |
652 | * All non-null elements of the list must match | |
653 | * their slot's (field index's) data (i.e., each | |
654 | * list string must be a substring of the specified | |
655 | * DMI slot's string data) to be considered a | |
656 | * successful match. | |
657 | * | |
658 | * Walk the blacklist table until the first match is found. Return the | |
659 | * pointer to the matching entry or NULL if there's no match. | |
660 | */ | |
661 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
662 | { | |
663 | const struct dmi_system_id *d; | |
664 | ||
75757507 | 665 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
666 | if (dmi_matches(d)) |
667 | return d; | |
668 | ||
669 | return NULL; | |
670 | } | |
671 | EXPORT_SYMBOL(dmi_first_match); | |
672 | ||
1da177e4 LT |
673 | /** |
674 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 675 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
676 | * |
677 | * Returns one DMI data value, can be used to perform | |
678 | * complex DMI data checks. | |
679 | */ | |
1855256c | 680 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
681 | { |
682 | return dmi_ident[field]; | |
683 | } | |
e70c9d5e | 684 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 685 | |
fd8cd7e1 | 686 | /** |
c2bacfc4 RD |
687 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
688 | * @str: string to check for | |
fd8cd7e1 AK |
689 | */ |
690 | int dmi_name_in_serial(const char *str) | |
691 | { | |
692 | int f = DMI_PRODUCT_SERIAL; | |
693 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
694 | return 1; | |
695 | return 0; | |
696 | } | |
a1bae672 AK |
697 | |
698 | /** | |
66e13e66 | 699 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
02d9c47f | 700 | * @str: Case sensitive Name |
a1bae672 | 701 | */ |
1855256c | 702 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 703 | { |
66e13e66 | 704 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
705 | int i; |
706 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
707 | int f = fields[i]; | |
708 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
709 | return 1; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
714 | ||
ebad6a42 AP |
715 | /** |
716 | * dmi_find_device - find onboard device by type/name | |
717 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 718 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
719 | * @from: previous device found in search, or %NULL for new search. |
720 | * | |
721 | * Iterates through the list of known onboard devices. If a device is | |
722 | * found with a matching @vendor and @device, a pointer to its device | |
723 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 724 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
725 | * If @from is not %NULL, searches continue from next device. |
726 | */ | |
02d9c47f | 727 | const struct dmi_device *dmi_find_device(int type, const char *name, |
1855256c | 728 | const struct dmi_device *from) |
ebad6a42 | 729 | { |
1855256c JG |
730 | const struct list_head *head = from ? &from->list : &dmi_devices; |
731 | struct list_head *d; | |
ebad6a42 | 732 | |
02d9c47f | 733 | for (d = head->next; d != &dmi_devices; d = d->next) { |
1855256c JG |
734 | const struct dmi_device *dev = |
735 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
736 | |
737 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
738 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
739 | return dev; | |
740 | } | |
741 | ||
742 | return NULL; | |
743 | } | |
744 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
745 | |
746 | /** | |
3e5cd1f2 TH |
747 | * dmi_get_date - parse a DMI date |
748 | * @field: data index (see enum dmi_field) | |
749 | * @yearp: optional out parameter for the year | |
750 | * @monthp: optional out parameter for the month | |
751 | * @dayp: optional out parameter for the day | |
f083a329 | 752 | * |
3e5cd1f2 TH |
753 | * The date field is assumed to be in the form resembling |
754 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
755 | * parameters any or all of which can be omitted. | |
756 | * | |
757 | * If the field doesn't exist, all out parameters are set to zero | |
758 | * and false is returned. Otherwise, true is returned with any | |
759 | * invalid part of date set to zero. | |
760 | * | |
761 | * On return, year, month and day are guaranteed to be in the | |
762 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 763 | */ |
3e5cd1f2 | 764 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 765 | { |
3e5cd1f2 TH |
766 | int year = 0, month = 0, day = 0; |
767 | bool exists; | |
768 | const char *s, *y; | |
02c24fa8 | 769 | char *e; |
f083a329 | 770 | |
3e5cd1f2 TH |
771 | s = dmi_get_system_info(field); |
772 | exists = s; | |
773 | if (!exists) | |
774 | goto out; | |
f083a329 | 775 | |
3e5cd1f2 TH |
776 | /* |
777 | * Determine year first. We assume the date string resembles | |
778 | * mm/dd/yy[yy] but the original code extracted only the year | |
779 | * from the end. Keep the behavior in the spirit of no | |
780 | * surprises. | |
781 | */ | |
782 | y = strrchr(s, '/'); | |
783 | if (!y) | |
784 | goto out; | |
785 | ||
786 | y++; | |
787 | year = simple_strtoul(y, &e, 10); | |
788 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
789 | year += 1900; |
790 | if (year < 1996) /* no dates < spec 1.0 */ | |
791 | year += 100; | |
792 | } | |
3e5cd1f2 TH |
793 | if (year > 9999) /* year should fit in %04d */ |
794 | year = 0; | |
795 | ||
796 | /* parse the mm and dd */ | |
797 | month = simple_strtoul(s, &e, 10); | |
798 | if (s == e || *e != '/' || !month || month > 12) { | |
799 | month = 0; | |
800 | goto out; | |
801 | } | |
f083a329 | 802 | |
3e5cd1f2 TH |
803 | s = e + 1; |
804 | day = simple_strtoul(s, &e, 10); | |
805 | if (s == y || s == e || *e != '/' || day > 31) | |
806 | day = 0; | |
807 | out: | |
808 | if (yearp) | |
809 | *yearp = year; | |
810 | if (monthp) | |
811 | *monthp = month; | |
812 | if (dayp) | |
813 | *dayp = day; | |
814 | return exists; | |
f083a329 | 815 | } |
3e5cd1f2 | 816 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
817 | |
818 | /** | |
819 | * dmi_walk - Walk the DMI table and get called back for every record | |
820 | * @decode: Callback function | |
e7a19c56 | 821 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
822 | * |
823 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
824 | */ | |
e7a19c56 JD |
825 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
826 | void *private_data) | |
7fce084a JD |
827 | { |
828 | u8 *buf; | |
829 | ||
830 | if (!dmi_available) | |
831 | return -1; | |
832 | ||
833 | buf = ioremap(dmi_base, dmi_len); | |
834 | if (buf == NULL) | |
835 | return -1; | |
836 | ||
e7a19c56 | 837 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a JD |
838 | |
839 | iounmap(buf); | |
840 | return 0; | |
841 | } | |
842 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
843 | |
844 | /** | |
845 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
846 | * @f: DMI field identifier |
847 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
848 | * |
849 | * Returns true if the requested field equals to the str (including NULL). | |
850 | */ | |
851 | bool dmi_match(enum dmi_field f, const char *str) | |
852 | { | |
853 | const char *info = dmi_get_system_info(f); | |
854 | ||
855 | if (info == NULL || str == NULL) | |
856 | return info == str; | |
857 | ||
858 | return !strcmp(info, str); | |
859 | } | |
860 | EXPORT_SYMBOL_GPL(dmi_match); | |
dd6dad42 CG |
861 | |
862 | void dmi_memdev_name(u16 handle, const char **bank, const char **device) | |
863 | { | |
864 | int n; | |
865 | ||
866 | if (dmi_memdev == NULL) | |
867 | return; | |
868 | ||
869 | for (n = 0; n < dmi_memdev_nr; n++) { | |
870 | if (handle == dmi_memdev[n].handle) { | |
871 | *bank = dmi_memdev[n].bank; | |
872 | *device = dmi_memdev[n].device; | |
873 | break; | |
874 | } | |
875 | } | |
876 | } | |
877 | EXPORT_SYMBOL_GPL(dmi_memdev_name); |