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 | */ | |
6d9ff473 | 81 | static void dmi_table(u8 *buf, u32 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); |
ce204e9a IK |
105 | |
106 | /* | |
107 | * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0] | |
108 | */ | |
109 | if (dm->type == DMI_ENTRY_END_OF_TABLE) | |
110 | break; | |
111 | ||
1249c513 | 112 | data += 2; |
1da177e4 LT |
113 | i++; |
114 | } | |
7fce084a JD |
115 | } |
116 | ||
fc430262 | 117 | static phys_addr_t dmi_base; |
6d9ff473 | 118 | static u32 dmi_len; |
7fce084a JD |
119 | static u16 dmi_num; |
120 | ||
e7a19c56 JD |
121 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
122 | void *)) | |
7fce084a JD |
123 | { |
124 | u8 *buf; | |
125 | ||
cf074402 | 126 | buf = dmi_early_remap(dmi_base, dmi_len); |
7fce084a JD |
127 | if (buf == NULL) |
128 | return -1; | |
129 | ||
e7a19c56 | 130 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 131 | |
d114a333 TL |
132 | add_device_randomness(buf, dmi_len); |
133 | ||
cf074402 | 134 | dmi_early_unmap(buf, dmi_len); |
1da177e4 LT |
135 | return 0; |
136 | } | |
137 | ||
9f9c9cbb | 138 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 139 | { |
1249c513 | 140 | u8 sum = 0; |
1da177e4 | 141 | int a; |
4f705ae3 | 142 | |
9f9c9cbb | 143 | for (a = 0; a < len; a++) |
1249c513 AP |
144 | sum += buf[a]; |
145 | ||
146 | return sum == 0; | |
1da177e4 LT |
147 | } |
148 | ||
ffbbb96d | 149 | static const char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 150 | static LIST_HEAD(dmi_devices); |
4f5c791a | 151 | int dmi_available; |
1da177e4 LT |
152 | |
153 | /* | |
154 | * Save a DMI string | |
155 | */ | |
02d9c47f JD |
156 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, |
157 | int string) | |
1da177e4 | 158 | { |
02d9c47f | 159 | const char *d = (const char *) dm; |
ffbbb96d | 160 | const char *p; |
1249c513 | 161 | |
1da177e4 LT |
162 | if (dmi_ident[slot]) |
163 | return; | |
1249c513 | 164 | |
c3c7120d AP |
165 | p = dmi_string(dm, d[string]); |
166 | if (p == NULL) | |
167 | return; | |
168 | ||
169 | dmi_ident[slot] = p; | |
1da177e4 LT |
170 | } |
171 | ||
02d9c47f JD |
172 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, |
173 | int index) | |
4f5c791a | 174 | { |
02d9c47f | 175 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
176 | char *s; |
177 | int is_ff = 1, is_00 = 1, i; | |
178 | ||
179 | if (dmi_ident[slot]) | |
180 | return; | |
181 | ||
182 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
f1d8e614 ZD |
183 | if (d[i] != 0x00) |
184 | is_00 = 0; | |
185 | if (d[i] != 0xFF) | |
186 | is_ff = 0; | |
4f5c791a LP |
187 | } |
188 | ||
189 | if (is_ff || is_00) | |
190 | return; | |
191 | ||
192 | s = dmi_alloc(16*2+4+1); | |
193 | if (!s) | |
194 | return; | |
195 | ||
f1d8e614 ZD |
196 | /* |
197 | * As of version 2.6 of the SMBIOS specification, the first 3 fields of | |
198 | * the UUID are supposed to be little-endian encoded. The specification | |
199 | * says that this is the defacto standard. | |
200 | */ | |
201 | if (dmi_ver >= 0x0206) | |
202 | sprintf(s, "%pUL", d); | |
203 | else | |
204 | sprintf(s, "%pUB", d); | |
4f5c791a | 205 | |
02d9c47f | 206 | dmi_ident[slot] = s; |
4f5c791a LP |
207 | } |
208 | ||
02d9c47f JD |
209 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, |
210 | int index) | |
4f5c791a | 211 | { |
02d9c47f | 212 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
213 | char *s; |
214 | ||
215 | if (dmi_ident[slot]) | |
216 | return; | |
217 | ||
218 | s = dmi_alloc(4); | |
219 | if (!s) | |
220 | return; | |
221 | ||
222 | sprintf(s, "%u", *d & 0x7F); | |
223 | dmi_ident[slot] = s; | |
224 | } | |
225 | ||
f3069ae9 JD |
226 | static void __init dmi_save_one_device(int type, const char *name) |
227 | { | |
228 | struct dmi_device *dev; | |
229 | ||
230 | /* No duplicate device */ | |
231 | if (dmi_find_device(type, name, NULL)) | |
232 | return; | |
233 | ||
234 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
ae797449 | 235 | if (!dev) |
f3069ae9 | 236 | return; |
f3069ae9 JD |
237 | |
238 | dev->type = type; | |
239 | strcpy((char *)(dev + 1), name); | |
240 | dev->name = (char *)(dev + 1); | |
241 | dev->device_data = NULL; | |
242 | list_add(&dev->list, &dmi_devices); | |
243 | } | |
244 | ||
1855256c | 245 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
246 | { |
247 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
248 | |
249 | for (i = 0; i < count; i++) { | |
1855256c | 250 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
251 | |
252 | /* Skip disabled device */ | |
253 | if ((*d & 0x80) == 0) | |
254 | continue; | |
255 | ||
f3069ae9 | 256 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
257 | } |
258 | } | |
259 | ||
1855256c | 260 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
261 | { |
262 | int i, count = *(u8 *)(dm + 1); | |
263 | struct dmi_device *dev; | |
264 | ||
265 | for (i = 1; i <= count; i++) { | |
ffbbb96d | 266 | const char *devname = dmi_string(dm, i); |
79da4721 | 267 | |
43fe105a | 268 | if (devname == dmi_empty_string) |
79da4721 | 269 | continue; |
79da4721 | 270 | |
2e0c1f6c | 271 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 272 | if (!dev) |
2e0c1f6c | 273 | break; |
2e0c1f6c SM |
274 | |
275 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 276 | dev->name = devname; |
2e0c1f6c | 277 | dev->device_data = NULL; |
ebad6a42 AP |
278 | |
279 | list_add(&dev->list, &dmi_devices); | |
280 | } | |
281 | } | |
282 | ||
1855256c | 283 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
284 | { |
285 | struct dmi_device *dev; | |
02d9c47f | 286 | void *data; |
ebad6a42 | 287 | |
e9928674 | 288 | data = dmi_alloc(dm->length); |
ae797449 | 289 | if (data == NULL) |
ebad6a42 | 290 | return; |
ebad6a42 AP |
291 | |
292 | memcpy(data, dm, dm->length); | |
293 | ||
e9928674 | 294 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 295 | if (!dev) |
ebad6a42 | 296 | return; |
ebad6a42 AP |
297 | |
298 | dev->type = DMI_DEV_TYPE_IPMI; | |
299 | dev->name = "IPMI controller"; | |
300 | dev->device_data = data; | |
301 | ||
abd24df8 | 302 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
303 | } |
304 | ||
911e1c9b N |
305 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
306 | int devfn, const char *name) | |
307 | { | |
308 | struct dmi_dev_onboard *onboard_dev; | |
309 | ||
310 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
ae797449 | 311 | if (!onboard_dev) |
911e1c9b | 312 | return; |
ae797449 | 313 | |
911e1c9b N |
314 | onboard_dev->instance = instance; |
315 | onboard_dev->segment = segment; | |
316 | onboard_dev->bus = bus; | |
317 | onboard_dev->devfn = devfn; | |
318 | ||
319 | strcpy((char *)&onboard_dev[1], name); | |
320 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
321 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
322 | onboard_dev->dev.device_data = onboard_dev; | |
323 | ||
324 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
325 | } | |
326 | ||
b4bd7d59 WVS |
327 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
328 | { | |
02d9c47f | 329 | const u8 *d = (u8 *) dm + 5; |
b4bd7d59 WVS |
330 | |
331 | /* Skip disabled device */ | |
332 | if ((*d & 0x80) == 0) | |
333 | return; | |
334 | ||
911e1c9b N |
335 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
336 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 337 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
338 | } |
339 | ||
dd6dad42 CG |
340 | static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
341 | { | |
342 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
343 | return; | |
344 | dmi_memdev_nr++; | |
345 | } | |
346 | ||
347 | static void __init save_mem_devices(const struct dmi_header *dm, void *v) | |
348 | { | |
349 | const char *d = (const char *)dm; | |
350 | static int nr; | |
351 | ||
352 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
353 | return; | |
354 | if (nr >= dmi_memdev_nr) { | |
355 | pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); | |
356 | return; | |
357 | } | |
0841c04d | 358 | dmi_memdev[nr].handle = get_unaligned(&dm->handle); |
dd6dad42 CG |
359 | dmi_memdev[nr].device = dmi_string(dm, d[0x10]); |
360 | dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); | |
361 | nr++; | |
362 | } | |
363 | ||
364 | void __init dmi_memdev_walk(void) | |
365 | { | |
366 | if (!dmi_available) | |
367 | return; | |
368 | ||
369 | if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { | |
370 | dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); | |
371 | if (dmi_memdev) | |
372 | dmi_walk_early(save_mem_devices); | |
373 | } | |
374 | } | |
375 | ||
1da177e4 LT |
376 | /* |
377 | * Process a DMI table entry. Right now all we care about are the BIOS | |
378 | * and machine entries. For 2.5 we should pull the smbus controller info | |
379 | * out of here. | |
380 | */ | |
e7a19c56 | 381 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 382 | { |
02d9c47f | 383 | switch (dm->type) { |
ebad6a42 | 384 | case 0: /* BIOS Information */ |
1249c513 | 385 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 386 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
387 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
388 | break; | |
ebad6a42 | 389 | case 1: /* System Information */ |
1249c513 | 390 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 391 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 392 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 393 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 394 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 395 | break; |
ebad6a42 | 396 | case 2: /* Base Board Information */ |
1249c513 | 397 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 398 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 399 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
400 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
401 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
402 | break; | |
403 | case 3: /* Chassis Information */ | |
404 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
405 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
406 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
407 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
408 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 409 | break; |
ebad6a42 AP |
410 | case 10: /* Onboard Devices Information */ |
411 | dmi_save_devices(dm); | |
412 | break; | |
2e0c1f6c SM |
413 | case 11: /* OEM Strings */ |
414 | dmi_save_oem_strings_devices(dm); | |
415 | break; | |
ebad6a42 AP |
416 | case 38: /* IPMI Device Information */ |
417 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
418 | break; |
419 | case 41: /* Onboard Devices Extended Information */ | |
420 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
421 | } |
422 | } | |
423 | ||
c90fe6bc | 424 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 425 | { |
c90fe6bc | 426 | int c = 0; |
8881cdce BH |
427 | const char *p; |
428 | ||
429 | if (!info) | |
c90fe6bc | 430 | return c; |
8881cdce BH |
431 | |
432 | for (p = info; *p; p++) | |
433 | if (isprint(*p)) | |
c90fe6bc | 434 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 435 | else |
c90fe6bc TH |
436 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
437 | return c; | |
8881cdce BH |
438 | } |
439 | ||
c90fe6bc | 440 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 441 | { |
c90fe6bc | 442 | int c = 0; |
84e383b3 NC |
443 | const char *board; /* Board Name is optional */ |
444 | ||
c90fe6bc TH |
445 | c += print_filtered(buf + c, len - c, |
446 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
447 | c += scnprintf(buf + c, len - c, " "); | |
448 | c += print_filtered(buf + c, len - c, | |
449 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
450 | ||
84e383b3 NC |
451 | board = dmi_get_system_info(DMI_BOARD_NAME); |
452 | if (board) { | |
c90fe6bc TH |
453 | c += scnprintf(buf + c, len - c, "/"); |
454 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 455 | } |
c90fe6bc TH |
456 | c += scnprintf(buf + c, len - c, ", BIOS "); |
457 | c += print_filtered(buf + c, len - c, | |
458 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
459 | c += scnprintf(buf + c, len - c, " "); | |
460 | c += print_filtered(buf + c, len - c, | |
461 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
462 | } |
463 | ||
d39de28c BH |
464 | /* |
465 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
466 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
467 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
468 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
469 | * takes precedence) and return 0. Otherwise return 1. | |
470 | */ | |
79bae42d | 471 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 472 | { |
79bae42d | 473 | int smbios_ver; |
1855256c | 474 | |
79bae42d BH |
475 | if (memcmp(buf, "_SM_", 4) == 0 && |
476 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
fc430262 | 477 | smbios_ver = get_unaligned_be16(buf + 6); |
79bae42d BH |
478 | |
479 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
480 | switch (smbios_ver) { | |
481 | case 0x021F: | |
482 | case 0x0221: | |
483 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", | |
484 | smbios_ver & 0xFF, 3); | |
485 | smbios_ver = 0x0203; | |
486 | break; | |
487 | case 0x0233: | |
488 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6); | |
489 | smbios_ver = 0x0206; | |
490 | break; | |
491 | } | |
492 | } else { | |
493 | smbios_ver = 0; | |
494 | } | |
495 | ||
496 | buf += 16; | |
497 | ||
498 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
fc430262 AB |
499 | dmi_num = get_unaligned_le16(buf + 12); |
500 | dmi_len = get_unaligned_le16(buf + 6); | |
501 | dmi_base = get_unaligned_le32(buf + 8); | |
61e032fa | 502 | |
8881cdce | 503 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d BH |
504 | if (smbios_ver) { |
505 | dmi_ver = smbios_ver; | |
9f9c9cbb ZD |
506 | pr_info("SMBIOS %d.%d present.\n", |
507 | dmi_ver >> 8, dmi_ver & 0xFF); | |
79bae42d | 508 | } else { |
9f9c9cbb ZD |
509 | dmi_ver = (buf[14] & 0xF0) << 4 | |
510 | (buf[14] & 0x0F); | |
511 | pr_info("Legacy DMI %d.%d present.\n", | |
512 | dmi_ver >> 8, dmi_ver & 0xFF); | |
513 | } | |
c90fe6bc TH |
514 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
515 | printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); | |
3ed3bce8 | 516 | return 0; |
8881cdce | 517 | } |
3ed3bce8 | 518 | } |
61e032fa | 519 | |
a40e7cf8 | 520 | return 1; |
9f9c9cbb ZD |
521 | } |
522 | ||
fc430262 AB |
523 | /* |
524 | * Check for the SMBIOS 3.0 64-bit entry point signature. Unlike the legacy | |
525 | * 32-bit entry point, there is no embedded DMI header (_DMI_) in here. | |
526 | */ | |
527 | static int __init dmi_smbios3_present(const u8 *buf) | |
528 | { | |
529 | if (memcmp(buf, "_SM3_", 5) == 0 && | |
530 | buf[6] < 32 && dmi_checksum(buf, buf[6])) { | |
531 | dmi_ver = get_unaligned_be16(buf + 7); | |
532 | dmi_len = get_unaligned_le32(buf + 12); | |
533 | dmi_base = get_unaligned_le64(buf + 16); | |
534 | ||
535 | /* | |
536 | * The 64-bit SMBIOS 3.0 entry point no longer has a field | |
537 | * containing the number of structures present in the table. | |
538 | * Instead, it defines the table size as a maximum size, and | |
539 | * relies on the end-of-table structure type (#127) to be used | |
540 | * to signal the end of the table. | |
541 | * So let's define dmi_num as an upper bound as well: each | |
542 | * structure has a 4 byte header, so dmi_len / 4 is an upper | |
543 | * bound for the number of structures in the table. | |
544 | */ | |
545 | dmi_num = dmi_len / 4; | |
546 | ||
547 | if (dmi_walk_early(dmi_decode) == 0) { | |
548 | pr_info("SMBIOS %d.%d present.\n", | |
549 | dmi_ver >> 8, dmi_ver & 0xFF); | |
550 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); | |
551 | pr_debug("DMI: %s\n", dmi_ids_string); | |
552 | return 0; | |
553 | } | |
554 | } | |
555 | return 1; | |
556 | } | |
557 | ||
3ed3bce8 MD |
558 | void __init dmi_scan_machine(void) |
559 | { | |
560 | char __iomem *p, *q; | |
79bae42d | 561 | char buf[32]; |
3ed3bce8 | 562 | |
83e68189 | 563 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
fc430262 AB |
564 | /* |
565 | * According to the DMTF SMBIOS reference spec v3.0.0, it is | |
566 | * allowed to define both the 64-bit entry point (smbios3) and | |
567 | * the 32-bit entry point (smbios), in which case they should | |
568 | * either both point to the same SMBIOS structure table, or the | |
569 | * table pointed to by the 64-bit entry point should contain a | |
570 | * superset of the table contents pointed to by the 32-bit entry | |
571 | * point (section 5.2) | |
572 | * This implies that the 64-bit entry point should have | |
573 | * precedence if it is defined and supported by the OS. If we | |
574 | * have the 64-bit entry point, but fail to decode it, fall | |
575 | * back to the legacy one (if available) | |
576 | */ | |
577 | if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) { | |
578 | p = dmi_early_remap(efi.smbios3, 32); | |
579 | if (p == NULL) | |
580 | goto error; | |
581 | memcpy_fromio(buf, p, 32); | |
582 | dmi_early_unmap(p, 32); | |
583 | ||
584 | if (!dmi_smbios3_present(buf)) { | |
585 | dmi_available = 1; | |
586 | goto out; | |
587 | } | |
588 | } | |
b2c99e3c | 589 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 590 | goto error; |
3ed3bce8 | 591 | |
4f5c791a LP |
592 | /* This is called as a core_initcall() because it isn't |
593 | * needed during early boot. This also means we can | |
594 | * iounmap the space when we're done with it. | |
595 | */ | |
cf074402 | 596 | p = dmi_early_remap(efi.smbios, 32); |
3ed3bce8 | 597 | if (p == NULL) |
9a22b6e7 | 598 | goto error; |
79bae42d | 599 | memcpy_fromio(buf, p, 32); |
cf074402 | 600 | dmi_early_unmap(p, 32); |
79bae42d BH |
601 | |
602 | if (!dmi_present(buf)) { | |
4f5c791a | 603 | dmi_available = 1; |
9a22b6e7 | 604 | goto out; |
4f5c791a | 605 | } |
cf074402 AB |
606 | } else if (IS_ENABLED(CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK)) { |
607 | p = dmi_early_remap(0xF0000, 0x10000); | |
3ed3bce8 | 608 | if (p == NULL) |
9a22b6e7 | 609 | goto error; |
3ed3bce8 | 610 | |
d39de28c BH |
611 | /* |
612 | * Iterate over all possible DMI header addresses q. | |
613 | * Maintain the 32 bytes around q in buf. On the | |
614 | * first iteration, substitute zero for the | |
615 | * out-of-range bytes so there is no chance of falsely | |
616 | * detecting an SMBIOS header. | |
617 | */ | |
79bae42d | 618 | memset(buf, 0, 16); |
3ed3bce8 | 619 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d | 620 | memcpy_fromio(buf + 16, q, 16); |
fc430262 | 621 | if (!dmi_smbios3_present(buf) || !dmi_present(buf)) { |
4f5c791a | 622 | dmi_available = 1; |
cf074402 | 623 | dmi_early_unmap(p, 0x10000); |
9a22b6e7 | 624 | goto out; |
4f5c791a | 625 | } |
79bae42d | 626 | memcpy(buf, buf + 16, 16); |
61e032fa | 627 | } |
cf074402 | 628 | dmi_early_unmap(p, 0x10000); |
61e032fa | 629 | } |
9a22b6e7 | 630 | error: |
02d9c47f | 631 | pr_info("DMI not present or invalid.\n"); |
9a22b6e7 IM |
632 | out: |
633 | dmi_initialized = 1; | |
1da177e4 LT |
634 | } |
635 | ||
98e5e1bf TH |
636 | /** |
637 | * dmi_set_dump_stack_arch_desc - set arch description for dump_stack() | |
638 | * | |
639 | * Invoke dump_stack_set_arch_desc() with DMI system information so that | |
640 | * DMI identifiers are printed out on task dumps. Arch boot code should | |
641 | * call this function after dmi_scan_machine() if it wants to print out DMI | |
642 | * identifiers on task dumps. | |
643 | */ | |
644 | void __init dmi_set_dump_stack_arch_desc(void) | |
645 | { | |
646 | dump_stack_set_arch_desc("%s", dmi_ids_string); | |
647 | } | |
648 | ||
d7b1956f RW |
649 | /** |
650 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
651 | * @dmi: pointer to the dmi_system_id structure to check | |
652 | */ | |
653 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
654 | { | |
655 | int i; | |
656 | ||
657 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
658 | ||
659 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
660 | int s = dmi->matches[i].slot; | |
661 | if (s == DMI_NONE) | |
75757507 | 662 | break; |
5017b285 JN |
663 | if (dmi_ident[s]) { |
664 | if (!dmi->matches[i].exact_match && | |
665 | strstr(dmi_ident[s], dmi->matches[i].substr)) | |
666 | continue; | |
667 | else if (dmi->matches[i].exact_match && | |
668 | !strcmp(dmi_ident[s], dmi->matches[i].substr)) | |
669 | continue; | |
670 | } | |
671 | ||
d7b1956f RW |
672 | /* No match */ |
673 | return false; | |
674 | } | |
675 | return true; | |
676 | } | |
677 | ||
75757507 DT |
678 | /** |
679 | * dmi_is_end_of_table - check for end-of-table marker | |
680 | * @dmi: pointer to the dmi_system_id structure to check | |
681 | */ | |
682 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
683 | { | |
684 | return dmi->matches[0].slot == DMI_NONE; | |
685 | } | |
686 | ||
1da177e4 LT |
687 | /** |
688 | * dmi_check_system - check system DMI data | |
689 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
690 | * All non-null elements of the list must match |
691 | * their slot's (field index's) data (i.e., each | |
692 | * list string must be a substring of the specified | |
693 | * DMI slot's string data) to be considered a | |
694 | * successful match. | |
1da177e4 LT |
695 | * |
696 | * Walk the blacklist table running matching functions until someone | |
697 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 698 | * each successful match. Returns the number of matches. |
1da177e4 | 699 | */ |
1855256c | 700 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 701 | { |
d7b1956f RW |
702 | int count = 0; |
703 | const struct dmi_system_id *d; | |
704 | ||
75757507 | 705 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
706 | if (dmi_matches(d)) { |
707 | count++; | |
708 | if (d->callback && d->callback(d)) | |
709 | break; | |
1da177e4 | 710 | } |
1da177e4 LT |
711 | |
712 | return count; | |
713 | } | |
1da177e4 LT |
714 | EXPORT_SYMBOL(dmi_check_system); |
715 | ||
d7b1956f RW |
716 | /** |
717 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
718 | * @list: array of dmi_system_id structures to match against | |
719 | * All non-null elements of the list must match | |
720 | * their slot's (field index's) data (i.e., each | |
721 | * list string must be a substring of the specified | |
722 | * DMI slot's string data) to be considered a | |
723 | * successful match. | |
724 | * | |
725 | * Walk the blacklist table until the first match is found. Return the | |
726 | * pointer to the matching entry or NULL if there's no match. | |
727 | */ | |
728 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
729 | { | |
730 | const struct dmi_system_id *d; | |
731 | ||
75757507 | 732 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
733 | if (dmi_matches(d)) |
734 | return d; | |
735 | ||
736 | return NULL; | |
737 | } | |
738 | EXPORT_SYMBOL(dmi_first_match); | |
739 | ||
1da177e4 LT |
740 | /** |
741 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 742 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
743 | * |
744 | * Returns one DMI data value, can be used to perform | |
745 | * complex DMI data checks. | |
746 | */ | |
1855256c | 747 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
748 | { |
749 | return dmi_ident[field]; | |
750 | } | |
e70c9d5e | 751 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 752 | |
fd8cd7e1 | 753 | /** |
c2bacfc4 RD |
754 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
755 | * @str: string to check for | |
fd8cd7e1 AK |
756 | */ |
757 | int dmi_name_in_serial(const char *str) | |
758 | { | |
759 | int f = DMI_PRODUCT_SERIAL; | |
760 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
761 | return 1; | |
762 | return 0; | |
763 | } | |
a1bae672 AK |
764 | |
765 | /** | |
66e13e66 | 766 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
02d9c47f | 767 | * @str: Case sensitive Name |
a1bae672 | 768 | */ |
1855256c | 769 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 770 | { |
66e13e66 | 771 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
772 | int i; |
773 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
774 | int f = fields[i]; | |
775 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
776 | return 1; | |
777 | } | |
778 | return 0; | |
779 | } | |
780 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
781 | ||
ebad6a42 AP |
782 | /** |
783 | * dmi_find_device - find onboard device by type/name | |
784 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 785 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
786 | * @from: previous device found in search, or %NULL for new search. |
787 | * | |
788 | * Iterates through the list of known onboard devices. If a device is | |
789 | * found with a matching @vendor and @device, a pointer to its device | |
790 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 791 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
792 | * If @from is not %NULL, searches continue from next device. |
793 | */ | |
02d9c47f | 794 | const struct dmi_device *dmi_find_device(int type, const char *name, |
1855256c | 795 | const struct dmi_device *from) |
ebad6a42 | 796 | { |
1855256c JG |
797 | const struct list_head *head = from ? &from->list : &dmi_devices; |
798 | struct list_head *d; | |
ebad6a42 | 799 | |
02d9c47f | 800 | for (d = head->next; d != &dmi_devices; d = d->next) { |
1855256c JG |
801 | const struct dmi_device *dev = |
802 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
803 | |
804 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
805 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
806 | return dev; | |
807 | } | |
808 | ||
809 | return NULL; | |
810 | } | |
811 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
812 | |
813 | /** | |
3e5cd1f2 TH |
814 | * dmi_get_date - parse a DMI date |
815 | * @field: data index (see enum dmi_field) | |
816 | * @yearp: optional out parameter for the year | |
817 | * @monthp: optional out parameter for the month | |
818 | * @dayp: optional out parameter for the day | |
f083a329 | 819 | * |
3e5cd1f2 TH |
820 | * The date field is assumed to be in the form resembling |
821 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
822 | * parameters any or all of which can be omitted. | |
823 | * | |
824 | * If the field doesn't exist, all out parameters are set to zero | |
825 | * and false is returned. Otherwise, true is returned with any | |
826 | * invalid part of date set to zero. | |
827 | * | |
828 | * On return, year, month and day are guaranteed to be in the | |
829 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 830 | */ |
3e5cd1f2 | 831 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 832 | { |
3e5cd1f2 TH |
833 | int year = 0, month = 0, day = 0; |
834 | bool exists; | |
835 | const char *s, *y; | |
02c24fa8 | 836 | char *e; |
f083a329 | 837 | |
3e5cd1f2 TH |
838 | s = dmi_get_system_info(field); |
839 | exists = s; | |
840 | if (!exists) | |
841 | goto out; | |
f083a329 | 842 | |
3e5cd1f2 TH |
843 | /* |
844 | * Determine year first. We assume the date string resembles | |
845 | * mm/dd/yy[yy] but the original code extracted only the year | |
846 | * from the end. Keep the behavior in the spirit of no | |
847 | * surprises. | |
848 | */ | |
849 | y = strrchr(s, '/'); | |
850 | if (!y) | |
851 | goto out; | |
852 | ||
853 | y++; | |
854 | year = simple_strtoul(y, &e, 10); | |
855 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
856 | year += 1900; |
857 | if (year < 1996) /* no dates < spec 1.0 */ | |
858 | year += 100; | |
859 | } | |
3e5cd1f2 TH |
860 | if (year > 9999) /* year should fit in %04d */ |
861 | year = 0; | |
862 | ||
863 | /* parse the mm and dd */ | |
864 | month = simple_strtoul(s, &e, 10); | |
865 | if (s == e || *e != '/' || !month || month > 12) { | |
866 | month = 0; | |
867 | goto out; | |
868 | } | |
f083a329 | 869 | |
3e5cd1f2 TH |
870 | s = e + 1; |
871 | day = simple_strtoul(s, &e, 10); | |
872 | if (s == y || s == e || *e != '/' || day > 31) | |
873 | day = 0; | |
874 | out: | |
875 | if (yearp) | |
876 | *yearp = year; | |
877 | if (monthp) | |
878 | *monthp = month; | |
879 | if (dayp) | |
880 | *dayp = day; | |
881 | return exists; | |
f083a329 | 882 | } |
3e5cd1f2 | 883 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
884 | |
885 | /** | |
886 | * dmi_walk - Walk the DMI table and get called back for every record | |
887 | * @decode: Callback function | |
e7a19c56 | 888 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
889 | * |
890 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
891 | */ | |
e7a19c56 JD |
892 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
893 | void *private_data) | |
7fce084a JD |
894 | { |
895 | u8 *buf; | |
896 | ||
897 | if (!dmi_available) | |
898 | return -1; | |
899 | ||
cf074402 | 900 | buf = dmi_remap(dmi_base, dmi_len); |
7fce084a JD |
901 | if (buf == NULL) |
902 | return -1; | |
903 | ||
e7a19c56 | 904 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a | 905 | |
cf074402 | 906 | dmi_unmap(buf); |
7fce084a JD |
907 | return 0; |
908 | } | |
909 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
910 | |
911 | /** | |
912 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
913 | * @f: DMI field identifier |
914 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
915 | * |
916 | * Returns true if the requested field equals to the str (including NULL). | |
917 | */ | |
918 | bool dmi_match(enum dmi_field f, const char *str) | |
919 | { | |
920 | const char *info = dmi_get_system_info(f); | |
921 | ||
922 | if (info == NULL || str == NULL) | |
923 | return info == str; | |
924 | ||
925 | return !strcmp(info, str); | |
926 | } | |
927 | EXPORT_SYMBOL_GPL(dmi_match); | |
dd6dad42 CG |
928 | |
929 | void dmi_memdev_name(u16 handle, const char **bank, const char **device) | |
930 | { | |
931 | int n; | |
932 | ||
933 | if (dmi_memdev == NULL) | |
934 | return; | |
935 | ||
936 | for (n = 0; n < dmi_memdev_nr; n++) { | |
937 | if (handle == dmi_memdev[n].handle) { | |
938 | *bank = dmi_memdev[n].bank; | |
939 | *device = dmi_memdev[n].device; | |
940 | break; | |
941 | } | |
942 | } | |
943 | } | |
944 | EXPORT_SYMBOL_GPL(dmi_memdev_name); |