Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 | 2 | #include <linux/types.h> |
1da177e4 LT |
3 | #include <linux/string.h> |
4 | #include <linux/init.h> | |
5 | #include <linux/module.h> | |
8881cdce | 6 | #include <linux/ctype.h> |
1da177e4 | 7 | #include <linux/dmi.h> |
3ed3bce8 | 8 | #include <linux/efi.h> |
57c8a661 | 9 | #include <linux/memblock.h> |
d114a333 | 10 | #include <linux/random.h> |
f2d3efed | 11 | #include <asm/dmi.h> |
0841c04d | 12 | #include <asm/unaligned.h> |
1da177e4 | 13 | |
3da27a4e TY |
14 | #ifndef SMBIOS_ENTRY_POINT_SCAN_START |
15 | #define SMBIOS_ENTRY_POINT_SCAN_START 0xF0000 | |
16 | #endif | |
17 | ||
d7f96f97 IK |
18 | struct kobject *dmi_kobj; |
19 | EXPORT_SYMBOL_GPL(dmi_kobj); | |
20 | ||
cb5dd7c1 PJ |
21 | /* |
22 | * DMI stands for "Desktop Management Interface". It is part | |
23 | * of and an antecedent to, SMBIOS, which stands for System | |
24 | * Management BIOS. See further: http://www.dmtf.org/standards | |
25 | */ | |
a7770ae1 | 26 | static const char dmi_empty_string[] = ""; |
79da4721 | 27 | |
95be58df | 28 | static u32 dmi_ver __initdata; |
552e19d8 IK |
29 | static u32 dmi_len; |
30 | static u16 dmi_num; | |
d7f96f97 IK |
31 | static u8 smbios_entry_point[32]; |
32 | static int smbios_entry_point_size; | |
33 | ||
c90fe6bc TH |
34 | /* DMI system identification string used during boot */ |
35 | static char dmi_ids_string[128] __initdata; | |
36 | ||
dd6dad42 CG |
37 | static struct dmi_memdev_info { |
38 | const char *device; | |
39 | const char *bank; | |
6deae96b | 40 | u64 size; /* bytes */ |
dd6dad42 | 41 | u16 handle; |
9e0afe39 | 42 | u8 type; /* DDR2, DDR3, DDR4 etc */ |
dd6dad42 CG |
43 | } *dmi_memdev; |
44 | static int dmi_memdev_nr; | |
45 | ||
f3069ae9 | 46 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 47 | { |
1855256c | 48 | const u8 *bp = ((u8 *) dm) + dm->length; |
a7770ae1 | 49 | const u8 *nsp; |
1249c513 | 50 | |
c3c7120d | 51 | if (s) { |
a7770ae1 | 52 | while (--s > 0 && *bp) |
c3c7120d | 53 | bp += strlen(bp) + 1; |
c3c7120d | 54 | |
a7770ae1 JD |
55 | /* Strings containing only spaces are considered empty */ |
56 | nsp = bp; | |
57 | while (*nsp == ' ') | |
58 | nsp++; | |
59 | if (*nsp != '\0') | |
f3069ae9 | 60 | return bp; |
4f705ae3 | 61 | } |
c3c7120d | 62 | |
a7770ae1 | 63 | return dmi_empty_string; |
f3069ae9 JD |
64 | } |
65 | ||
ffbbb96d | 66 | static const char * __init dmi_string(const struct dmi_header *dm, u8 s) |
f3069ae9 JD |
67 | { |
68 | const char *bp = dmi_string_nosave(dm, s); | |
69 | char *str; | |
70 | size_t len; | |
71 | ||
72 | if (bp == dmi_empty_string) | |
73 | return dmi_empty_string; | |
74 | ||
75 | len = strlen(bp) + 1; | |
76 | str = dmi_alloc(len); | |
77 | if (str != NULL) | |
78 | strcpy(str, bp); | |
f3069ae9 | 79 | |
c3c7120d | 80 | return str; |
1da177e4 LT |
81 | } |
82 | ||
83 | /* | |
84 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
85 | * pointing to completely the wrong place for example | |
86 | */ | |
eb4c5ea5 IK |
87 | static void dmi_decode_table(u8 *buf, |
88 | void (*decode)(const struct dmi_header *, void *), | |
89 | void *private_data) | |
1da177e4 | 90 | { |
7fce084a | 91 | u8 *data = buf; |
1249c513 | 92 | int i = 0; |
4f705ae3 | 93 | |
1da177e4 | 94 | /* |
bfbaafae | 95 | * Stop when we have seen all the items the table claimed to have |
17cd5bd5 JD |
96 | * (SMBIOS < 3.0 only) OR we reach an end-of-table marker (SMBIOS |
97 | * >= 3.0 only) OR we run off the end of the table (should never | |
98 | * happen but sometimes does on bogus implementations.) | |
4f705ae3 | 99 | */ |
9c65e12a LT |
100 | while ((!dmi_num || i < dmi_num) && |
101 | (data - buf + sizeof(struct dmi_header)) <= dmi_len) { | |
1855256c JG |
102 | const struct dmi_header *dm = (const struct dmi_header *)data; |
103 | ||
1da177e4 | 104 | /* |
8638545c AC |
105 | * We want to know the total length (formatted area and |
106 | * strings) before decoding to make sure we won't run off the | |
107 | * table in dmi_decode or dmi_string | |
1da177e4 | 108 | */ |
1249c513 | 109 | data += dm->length; |
552e19d8 | 110 | while ((data - buf < dmi_len - 1) && (data[0] || data[1])) |
1da177e4 | 111 | data++; |
552e19d8 | 112 | if (data - buf < dmi_len - 1) |
e7a19c56 | 113 | decode(dm, private_data); |
ce204e9a | 114 | |
6e0ad59e JD |
115 | data += 2; |
116 | i++; | |
117 | ||
ce204e9a IK |
118 | /* |
119 | * 7.45 End-of-Table (Type 127) [SMBIOS reference spec v3.0.0] | |
17cd5bd5 JD |
120 | * For tables behind a 64-bit entry point, we have no item |
121 | * count and no exact table length, so stop on end-of-table | |
122 | * marker. For tables behind a 32-bit entry point, we have | |
123 | * seen OEM structures behind the end-of-table marker on | |
124 | * some systems, so don't trust it. | |
ce204e9a | 125 | */ |
17cd5bd5 | 126 | if (!dmi_num && dm->type == DMI_ENTRY_END_OF_TABLE) |
ce204e9a | 127 | break; |
1da177e4 | 128 | } |
6e0ad59e JD |
129 | |
130 | /* Trim DMI table length if needed */ | |
131 | if (dmi_len > data - buf) | |
132 | dmi_len = data - buf; | |
7fce084a JD |
133 | } |
134 | ||
fc430262 | 135 | static phys_addr_t dmi_base; |
7fce084a | 136 | |
e7a19c56 JD |
137 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
138 | void *)) | |
7fce084a JD |
139 | { |
140 | u8 *buf; | |
6e0ad59e | 141 | u32 orig_dmi_len = dmi_len; |
7fce084a | 142 | |
6e0ad59e | 143 | buf = dmi_early_remap(dmi_base, orig_dmi_len); |
7fce084a | 144 | if (buf == NULL) |
c9268200 | 145 | return -ENOMEM; |
7fce084a | 146 | |
eb4c5ea5 | 147 | dmi_decode_table(buf, decode, NULL); |
7fce084a | 148 | |
d114a333 TL |
149 | add_device_randomness(buf, dmi_len); |
150 | ||
6e0ad59e | 151 | dmi_early_unmap(buf, orig_dmi_len); |
1da177e4 LT |
152 | return 0; |
153 | } | |
154 | ||
9f9c9cbb | 155 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 156 | { |
1249c513 | 157 | u8 sum = 0; |
1da177e4 | 158 | int a; |
4f705ae3 | 159 | |
9f9c9cbb | 160 | for (a = 0; a < len; a++) |
1249c513 AP |
161 | sum += buf[a]; |
162 | ||
163 | return sum == 0; | |
1da177e4 LT |
164 | } |
165 | ||
ffbbb96d | 166 | static const char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 167 | static LIST_HEAD(dmi_devices); |
4f5c791a | 168 | int dmi_available; |
1da177e4 LT |
169 | |
170 | /* | |
171 | * Save a DMI string | |
172 | */ | |
02d9c47f JD |
173 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, |
174 | int string) | |
1da177e4 | 175 | { |
02d9c47f | 176 | const char *d = (const char *) dm; |
ffbbb96d | 177 | const char *p; |
1249c513 | 178 | |
a814c359 | 179 | if (dmi_ident[slot] || dm->length <= string) |
1da177e4 | 180 | return; |
1249c513 | 181 | |
c3c7120d AP |
182 | p = dmi_string(dm, d[string]); |
183 | if (p == NULL) | |
184 | return; | |
185 | ||
186 | dmi_ident[slot] = p; | |
1da177e4 LT |
187 | } |
188 | ||
f5152f4d EV |
189 | static void __init dmi_save_release(const struct dmi_header *dm, int slot, |
190 | int index) | |
191 | { | |
192 | const u8 *minor, *major; | |
193 | char *s; | |
194 | ||
195 | /* If the table doesn't have the field, let's return */ | |
196 | if (dmi_ident[slot] || dm->length < index) | |
197 | return; | |
198 | ||
199 | minor = (u8 *) dm + index; | |
200 | major = (u8 *) dm + index - 1; | |
201 | ||
202 | /* As per the spec, if the system doesn't support this field, | |
203 | * the value is FF | |
204 | */ | |
205 | if (*major == 0xFF && *minor == 0xFF) | |
206 | return; | |
207 | ||
208 | s = dmi_alloc(8); | |
209 | if (!s) | |
210 | return; | |
211 | ||
212 | sprintf(s, "%u.%u", *major, *minor); | |
213 | ||
214 | dmi_ident[slot] = s; | |
215 | } | |
216 | ||
02d9c47f JD |
217 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, |
218 | int index) | |
4f5c791a | 219 | { |
a814c359 | 220 | const u8 *d; |
4f5c791a LP |
221 | char *s; |
222 | int is_ff = 1, is_00 = 1, i; | |
223 | ||
90fe6f8f | 224 | if (dmi_ident[slot] || dm->length < index + 16) |
4f5c791a LP |
225 | return; |
226 | ||
a814c359 | 227 | d = (u8 *) dm + index; |
4f5c791a | 228 | for (i = 0; i < 16 && (is_ff || is_00); i++) { |
f1d8e614 ZD |
229 | if (d[i] != 0x00) |
230 | is_00 = 0; | |
231 | if (d[i] != 0xFF) | |
232 | is_ff = 0; | |
4f5c791a LP |
233 | } |
234 | ||
235 | if (is_ff || is_00) | |
236 | return; | |
237 | ||
238 | s = dmi_alloc(16*2+4+1); | |
239 | if (!s) | |
240 | return; | |
241 | ||
f1d8e614 ZD |
242 | /* |
243 | * As of version 2.6 of the SMBIOS specification, the first 3 fields of | |
244 | * the UUID are supposed to be little-endian encoded. The specification | |
245 | * says that this is the defacto standard. | |
246 | */ | |
95be58df | 247 | if (dmi_ver >= 0x020600) |
712ff254 | 248 | sprintf(s, "%pUl", d); |
f1d8e614 | 249 | else |
712ff254 | 250 | sprintf(s, "%pUb", d); |
4f5c791a | 251 | |
02d9c47f | 252 | dmi_ident[slot] = s; |
4f5c791a LP |
253 | } |
254 | ||
02d9c47f JD |
255 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, |
256 | int index) | |
4f5c791a | 257 | { |
a814c359 | 258 | const u8 *d; |
4f5c791a LP |
259 | char *s; |
260 | ||
a814c359 | 261 | if (dmi_ident[slot] || dm->length <= index) |
4f5c791a LP |
262 | return; |
263 | ||
264 | s = dmi_alloc(4); | |
265 | if (!s) | |
266 | return; | |
267 | ||
a814c359 | 268 | d = (u8 *) dm + index; |
4f5c791a LP |
269 | sprintf(s, "%u", *d & 0x7F); |
270 | dmi_ident[slot] = s; | |
271 | } | |
272 | ||
f3069ae9 JD |
273 | static void __init dmi_save_one_device(int type, const char *name) |
274 | { | |
275 | struct dmi_device *dev; | |
276 | ||
277 | /* No duplicate device */ | |
278 | if (dmi_find_device(type, name, NULL)) | |
279 | return; | |
280 | ||
281 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
ae797449 | 282 | if (!dev) |
f3069ae9 | 283 | return; |
f3069ae9 JD |
284 | |
285 | dev->type = type; | |
286 | strcpy((char *)(dev + 1), name); | |
287 | dev->name = (char *)(dev + 1); | |
288 | dev->device_data = NULL; | |
289 | list_add(&dev->list, &dmi_devices); | |
290 | } | |
291 | ||
1855256c | 292 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
293 | { |
294 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
295 | |
296 | for (i = 0; i < count; i++) { | |
1855256c | 297 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
298 | |
299 | /* Skip disabled device */ | |
300 | if ((*d & 0x80) == 0) | |
301 | continue; | |
302 | ||
f3069ae9 | 303 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
304 | } |
305 | } | |
306 | ||
1855256c | 307 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c | 308 | { |
a814c359 | 309 | int i, count; |
2e0c1f6c SM |
310 | struct dmi_device *dev; |
311 | ||
a814c359 JD |
312 | if (dm->length < 0x05) |
313 | return; | |
314 | ||
315 | count = *(u8 *)(dm + 1); | |
2e0c1f6c | 316 | for (i = 1; i <= count; i++) { |
ffbbb96d | 317 | const char *devname = dmi_string(dm, i); |
79da4721 | 318 | |
43fe105a | 319 | if (devname == dmi_empty_string) |
79da4721 | 320 | continue; |
79da4721 | 321 | |
2e0c1f6c | 322 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 323 | if (!dev) |
2e0c1f6c | 324 | break; |
2e0c1f6c SM |
325 | |
326 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 327 | dev->name = devname; |
2e0c1f6c | 328 | dev->device_data = NULL; |
ebad6a42 AP |
329 | |
330 | list_add(&dev->list, &dmi_devices); | |
331 | } | |
332 | } | |
333 | ||
1855256c | 334 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
335 | { |
336 | struct dmi_device *dev; | |
02d9c47f | 337 | void *data; |
ebad6a42 | 338 | |
e9928674 | 339 | data = dmi_alloc(dm->length); |
ae797449 | 340 | if (data == NULL) |
ebad6a42 | 341 | return; |
ebad6a42 AP |
342 | |
343 | memcpy(data, dm, dm->length); | |
344 | ||
e9928674 | 345 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 346 | if (!dev) |
ebad6a42 | 347 | return; |
ebad6a42 AP |
348 | |
349 | dev->type = DMI_DEV_TYPE_IPMI; | |
350 | dev->name = "IPMI controller"; | |
351 | dev->device_data = data; | |
352 | ||
abd24df8 | 353 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
354 | } |
355 | ||
e5b6c151 JH |
356 | static void __init dmi_save_dev_pciaddr(int instance, int segment, int bus, |
357 | int devfn, const char *name, int type) | |
911e1c9b | 358 | { |
e5b6c151 | 359 | struct dmi_dev_onboard *dev; |
911e1c9b | 360 | |
e5b6c151 JH |
361 | /* Ignore invalid values */ |
362 | if (type == DMI_DEV_TYPE_DEV_SLOT && | |
363 | segment == 0xFFFF && bus == 0xFF && devfn == 0xFF) | |
911e1c9b | 364 | return; |
ae797449 | 365 | |
e5b6c151 JH |
366 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); |
367 | if (!dev) | |
368 | return; | |
911e1c9b | 369 | |
e5b6c151 JH |
370 | dev->instance = instance; |
371 | dev->segment = segment; | |
372 | dev->bus = bus; | |
373 | dev->devfn = devfn; | |
911e1c9b | 374 | |
e5b6c151 JH |
375 | strcpy((char *)&dev[1], name); |
376 | dev->dev.type = type; | |
377 | dev->dev.name = (char *)&dev[1]; | |
378 | dev->dev.device_data = dev; | |
379 | ||
380 | list_add(&dev->dev.list, &dmi_devices); | |
911e1c9b N |
381 | } |
382 | ||
b4bd7d59 WVS |
383 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
384 | { | |
96e23943 | 385 | const char *name; |
45b98257 | 386 | const u8 *d = (u8 *)dm; |
b4bd7d59 | 387 | |
a814c359 JD |
388 | if (dm->length < 0x0B) |
389 | return; | |
390 | ||
b4bd7d59 | 391 | /* Skip disabled device */ |
45b98257 | 392 | if ((d[0x5] & 0x80) == 0) |
b4bd7d59 WVS |
393 | return; |
394 | ||
45b98257 | 395 | name = dmi_string_nosave(dm, d[0x4]); |
e5b6c151 JH |
396 | dmi_save_dev_pciaddr(d[0x6], *(u16 *)(d + 0x7), d[0x9], d[0xA], name, |
397 | DMI_DEV_TYPE_DEV_ONBOARD); | |
45b98257 | 398 | dmi_save_one_device(d[0x5] & 0x7f, name); |
b4bd7d59 WVS |
399 | } |
400 | ||
e5b6c151 JH |
401 | static void __init dmi_save_system_slot(const struct dmi_header *dm) |
402 | { | |
403 | const u8 *d = (u8 *)dm; | |
404 | ||
405 | /* Need SMBIOS 2.6+ structure */ | |
406 | if (dm->length < 0x11) | |
407 | return; | |
408 | dmi_save_dev_pciaddr(*(u16 *)(d + 0x9), *(u16 *)(d + 0xD), d[0xF], | |
409 | d[0x10], dmi_string_nosave(dm, d[0x4]), | |
410 | DMI_DEV_TYPE_DEV_SLOT); | |
411 | } | |
412 | ||
dd6dad42 CG |
413 | static void __init count_mem_devices(const struct dmi_header *dm, void *v) |
414 | { | |
415 | if (dm->type != DMI_ENTRY_MEM_DEVICE) | |
416 | return; | |
417 | dmi_memdev_nr++; | |
418 | } | |
419 | ||
420 | static void __init save_mem_devices(const struct dmi_header *dm, void *v) | |
421 | { | |
422 | const char *d = (const char *)dm; | |
423 | static int nr; | |
6deae96b TL |
424 | u64 bytes; |
425 | u16 size; | |
dd6dad42 | 426 | |
9e0afe39 | 427 | if (dm->type != DMI_ENTRY_MEM_DEVICE || dm->length < 0x13) |
dd6dad42 CG |
428 | return; |
429 | if (nr >= dmi_memdev_nr) { | |
430 | pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n"); | |
431 | return; | |
432 | } | |
0841c04d | 433 | dmi_memdev[nr].handle = get_unaligned(&dm->handle); |
dd6dad42 CG |
434 | dmi_memdev[nr].device = dmi_string(dm, d[0x10]); |
435 | dmi_memdev[nr].bank = dmi_string(dm, d[0x11]); | |
9e0afe39 | 436 | dmi_memdev[nr].type = d[0x12]; |
6deae96b TL |
437 | |
438 | size = get_unaligned((u16 *)&d[0xC]); | |
439 | if (size == 0) | |
440 | bytes = 0; | |
441 | else if (size == 0xffff) | |
442 | bytes = ~0ull; | |
443 | else if (size & 0x8000) | |
444 | bytes = (u64)(size & 0x7fff) << 10; | |
81dde26d | 445 | else if (size != 0x7fff || dm->length < 0x20) |
6deae96b TL |
446 | bytes = (u64)size << 20; |
447 | else | |
448 | bytes = (u64)get_unaligned((u32 *)&d[0x1C]) << 20; | |
449 | ||
450 | dmi_memdev[nr].size = bytes; | |
dd6dad42 CG |
451 | nr++; |
452 | } | |
453 | ||
0fca0812 | 454 | static void __init dmi_memdev_walk(void) |
dd6dad42 | 455 | { |
dd6dad42 CG |
456 | if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) { |
457 | dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr); | |
458 | if (dmi_memdev) | |
459 | dmi_walk_early(save_mem_devices); | |
460 | } | |
461 | } | |
462 | ||
1da177e4 LT |
463 | /* |
464 | * Process a DMI table entry. Right now all we care about are the BIOS | |
465 | * and machine entries. For 2.5 we should pull the smbus controller info | |
466 | * out of here. | |
467 | */ | |
e7a19c56 | 468 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 469 | { |
02d9c47f | 470 | switch (dm->type) { |
ebad6a42 | 471 | case 0: /* BIOS Information */ |
1249c513 | 472 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 473 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 | 474 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
f5152f4d EV |
475 | dmi_save_release(dm, DMI_BIOS_RELEASE, 21); |
476 | dmi_save_release(dm, DMI_EC_FIRMWARE_RELEASE, 23); | |
1249c513 | 477 | break; |
ebad6a42 | 478 | case 1: /* System Information */ |
1249c513 | 479 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 480 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 481 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 482 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 483 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
b23908d3 | 484 | dmi_save_ident(dm, DMI_PRODUCT_SKU, 25); |
c61872c9 | 485 | dmi_save_ident(dm, DMI_PRODUCT_FAMILY, 26); |
1249c513 | 486 | break; |
ebad6a42 | 487 | case 2: /* Base Board Information */ |
1249c513 | 488 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 489 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 490 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
491 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
492 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
493 | break; | |
494 | case 3: /* Chassis Information */ | |
495 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
496 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
497 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
498 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
499 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 500 | break; |
e5b6c151 JH |
501 | case 9: /* System Slots */ |
502 | dmi_save_system_slot(dm); | |
503 | break; | |
ebad6a42 AP |
504 | case 10: /* Onboard Devices Information */ |
505 | dmi_save_devices(dm); | |
506 | break; | |
2e0c1f6c SM |
507 | case 11: /* OEM Strings */ |
508 | dmi_save_oem_strings_devices(dm); | |
509 | break; | |
ebad6a42 AP |
510 | case 38: /* IPMI Device Information */ |
511 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
512 | break; |
513 | case 41: /* Onboard Devices Extended Information */ | |
514 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
515 | } |
516 | } | |
517 | ||
c90fe6bc | 518 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 519 | { |
c90fe6bc | 520 | int c = 0; |
8881cdce BH |
521 | const char *p; |
522 | ||
523 | if (!info) | |
c90fe6bc | 524 | return c; |
8881cdce BH |
525 | |
526 | for (p = info; *p; p++) | |
527 | if (isprint(*p)) | |
c90fe6bc | 528 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 529 | else |
c90fe6bc TH |
530 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
531 | return c; | |
8881cdce BH |
532 | } |
533 | ||
c90fe6bc | 534 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 535 | { |
c90fe6bc | 536 | int c = 0; |
84e383b3 NC |
537 | const char *board; /* Board Name is optional */ |
538 | ||
c90fe6bc TH |
539 | c += print_filtered(buf + c, len - c, |
540 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
541 | c += scnprintf(buf + c, len - c, " "); | |
542 | c += print_filtered(buf + c, len - c, | |
543 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
544 | ||
84e383b3 NC |
545 | board = dmi_get_system_info(DMI_BOARD_NAME); |
546 | if (board) { | |
c90fe6bc TH |
547 | c += scnprintf(buf + c, len - c, "/"); |
548 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 549 | } |
c90fe6bc TH |
550 | c += scnprintf(buf + c, len - c, ", BIOS "); |
551 | c += print_filtered(buf + c, len - c, | |
552 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
553 | c += scnprintf(buf + c, len - c, " "); | |
554 | c += print_filtered(buf + c, len - c, | |
555 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
556 | } |
557 | ||
d39de28c BH |
558 | /* |
559 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
560 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
561 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
562 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
563 | * takes precedence) and return 0. Otherwise return 1. | |
564 | */ | |
79bae42d | 565 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 566 | { |
95be58df | 567 | u32 smbios_ver; |
1855256c | 568 | |
79bae42d BH |
569 | if (memcmp(buf, "_SM_", 4) == 0 && |
570 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
fc430262 | 571 | smbios_ver = get_unaligned_be16(buf + 6); |
d7f96f97 IK |
572 | smbios_entry_point_size = buf[5]; |
573 | memcpy(smbios_entry_point, buf, smbios_entry_point_size); | |
79bae42d BH |
574 | |
575 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
576 | switch (smbios_ver) { | |
577 | case 0x021F: | |
578 | case 0x0221: | |
d1d8704c | 579 | pr_debug("SMBIOS version fixup (2.%d->2.%d)\n", |
79bae42d BH |
580 | smbios_ver & 0xFF, 3); |
581 | smbios_ver = 0x0203; | |
582 | break; | |
583 | case 0x0233: | |
d1d8704c | 584 | pr_debug("SMBIOS version fixup (2.%d->2.%d)\n", 51, 6); |
79bae42d BH |
585 | smbios_ver = 0x0206; |
586 | break; | |
587 | } | |
588 | } else { | |
589 | smbios_ver = 0; | |
590 | } | |
591 | ||
592 | buf += 16; | |
593 | ||
594 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
5c1ac56b JD |
595 | if (smbios_ver) |
596 | dmi_ver = smbios_ver; | |
597 | else | |
598 | dmi_ver = (buf[14] & 0xF0) << 4 | (buf[14] & 0x0F); | |
ff4319dc | 599 | dmi_ver <<= 8; |
fc430262 AB |
600 | dmi_num = get_unaligned_le16(buf + 12); |
601 | dmi_len = get_unaligned_le16(buf + 6); | |
602 | dmi_base = get_unaligned_le32(buf + 8); | |
61e032fa | 603 | |
8881cdce | 604 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d | 605 | if (smbios_ver) { |
c2493045 | 606 | pr_info("SMBIOS %d.%d present.\n", |
ff4319dc | 607 | dmi_ver >> 16, (dmi_ver >> 8) & 0xFF); |
79bae42d | 608 | } else { |
d7f96f97 IK |
609 | smbios_entry_point_size = 15; |
610 | memcpy(smbios_entry_point, buf, | |
611 | smbios_entry_point_size); | |
9f9c9cbb | 612 | pr_info("Legacy DMI %d.%d present.\n", |
ff4319dc | 613 | dmi_ver >> 16, (dmi_ver >> 8) & 0xFF); |
9f9c9cbb | 614 | } |
c90fe6bc | 615 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
d4af49f8 | 616 | pr_info("DMI: %s\n", dmi_ids_string); |
3ed3bce8 | 617 | return 0; |
8881cdce | 618 | } |
3ed3bce8 | 619 | } |
61e032fa | 620 | |
a40e7cf8 | 621 | return 1; |
9f9c9cbb ZD |
622 | } |
623 | ||
fc430262 AB |
624 | /* |
625 | * Check for the SMBIOS 3.0 64-bit entry point signature. Unlike the legacy | |
626 | * 32-bit entry point, there is no embedded DMI header (_DMI_) in here. | |
627 | */ | |
628 | static int __init dmi_smbios3_present(const u8 *buf) | |
629 | { | |
630 | if (memcmp(buf, "_SM3_", 5) == 0 && | |
631 | buf[6] < 32 && dmi_checksum(buf, buf[6])) { | |
d1d8704c | 632 | dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF; |
bfbaafae | 633 | dmi_num = 0; /* No longer specified */ |
fc430262 AB |
634 | dmi_len = get_unaligned_le32(buf + 12); |
635 | dmi_base = get_unaligned_le64(buf + 16); | |
d7f96f97 IK |
636 | smbios_entry_point_size = buf[6]; |
637 | memcpy(smbios_entry_point, buf, smbios_entry_point_size); | |
fc430262 | 638 | |
fc430262 | 639 | if (dmi_walk_early(dmi_decode) == 0) { |
95be58df IK |
640 | pr_info("SMBIOS %d.%d.%d present.\n", |
641 | dmi_ver >> 16, (dmi_ver >> 8) & 0xFF, | |
642 | dmi_ver & 0xFF); | |
fc430262 | 643 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
d4af49f8 | 644 | pr_info("DMI: %s\n", dmi_ids_string); |
fc430262 AB |
645 | return 0; |
646 | } | |
647 | } | |
648 | return 1; | |
649 | } | |
650 | ||
0fca0812 | 651 | static void __init dmi_scan_machine(void) |
3ed3bce8 MD |
652 | { |
653 | char __iomem *p, *q; | |
79bae42d | 654 | char buf[32]; |
3ed3bce8 | 655 | |
83e68189 | 656 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
fc430262 AB |
657 | /* |
658 | * According to the DMTF SMBIOS reference spec v3.0.0, it is | |
659 | * allowed to define both the 64-bit entry point (smbios3) and | |
660 | * the 32-bit entry point (smbios), in which case they should | |
661 | * either both point to the same SMBIOS structure table, or the | |
662 | * table pointed to by the 64-bit entry point should contain a | |
663 | * superset of the table contents pointed to by the 32-bit entry | |
664 | * point (section 5.2) | |
665 | * This implies that the 64-bit entry point should have | |
666 | * precedence if it is defined and supported by the OS. If we | |
667 | * have the 64-bit entry point, but fail to decode it, fall | |
668 | * back to the legacy one (if available) | |
669 | */ | |
670 | if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) { | |
671 | p = dmi_early_remap(efi.smbios3, 32); | |
672 | if (p == NULL) | |
673 | goto error; | |
674 | memcpy_fromio(buf, p, 32); | |
675 | dmi_early_unmap(p, 32); | |
676 | ||
677 | if (!dmi_smbios3_present(buf)) { | |
678 | dmi_available = 1; | |
7117794f | 679 | return; |
fc430262 AB |
680 | } |
681 | } | |
b2c99e3c | 682 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 683 | goto error; |
3ed3bce8 | 684 | |
4f5c791a LP |
685 | /* This is called as a core_initcall() because it isn't |
686 | * needed during early boot. This also means we can | |
687 | * iounmap the space when we're done with it. | |
688 | */ | |
cf074402 | 689 | p = dmi_early_remap(efi.smbios, 32); |
3ed3bce8 | 690 | if (p == NULL) |
9a22b6e7 | 691 | goto error; |
79bae42d | 692 | memcpy_fromio(buf, p, 32); |
cf074402 | 693 | dmi_early_unmap(p, 32); |
79bae42d BH |
694 | |
695 | if (!dmi_present(buf)) { | |
4f5c791a | 696 | dmi_available = 1; |
7117794f | 697 | return; |
4f5c791a | 698 | } |
cf074402 | 699 | } else if (IS_ENABLED(CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK)) { |
3da27a4e | 700 | p = dmi_early_remap(SMBIOS_ENTRY_POINT_SCAN_START, 0x10000); |
3ed3bce8 | 701 | if (p == NULL) |
9a22b6e7 | 702 | goto error; |
3ed3bce8 | 703 | |
c9aba143 JD |
704 | /* |
705 | * Same logic as above, look for a 64-bit entry point | |
706 | * first, and if not found, fall back to 32-bit entry point. | |
707 | */ | |
708 | memcpy_fromio(buf, p, 16); | |
709 | for (q = p + 16; q < p + 0x10000; q += 16) { | |
710 | memcpy_fromio(buf + 16, q, 16); | |
711 | if (!dmi_smbios3_present(buf)) { | |
712 | dmi_available = 1; | |
713 | dmi_early_unmap(p, 0x10000); | |
7117794f | 714 | return; |
c9aba143 JD |
715 | } |
716 | memcpy(buf, buf + 16, 16); | |
717 | } | |
718 | ||
d39de28c BH |
719 | /* |
720 | * Iterate over all possible DMI header addresses q. | |
721 | * Maintain the 32 bytes around q in buf. On the | |
722 | * first iteration, substitute zero for the | |
723 | * out-of-range bytes so there is no chance of falsely | |
724 | * detecting an SMBIOS header. | |
725 | */ | |
79bae42d | 726 | memset(buf, 0, 16); |
3ed3bce8 | 727 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d | 728 | memcpy_fromio(buf + 16, q, 16); |
c9aba143 | 729 | if (!dmi_present(buf)) { |
4f5c791a | 730 | dmi_available = 1; |
cf074402 | 731 | dmi_early_unmap(p, 0x10000); |
7117794f | 732 | return; |
4f5c791a | 733 | } |
79bae42d | 734 | memcpy(buf, buf + 16, 16); |
61e032fa | 735 | } |
cf074402 | 736 | dmi_early_unmap(p, 0x10000); |
61e032fa | 737 | } |
9a22b6e7 | 738 | error: |
02d9c47f | 739 | pr_info("DMI not present or invalid.\n"); |
1da177e4 LT |
740 | } |
741 | ||
d7f96f97 IK |
742 | static ssize_t raw_table_read(struct file *file, struct kobject *kobj, |
743 | struct bin_attribute *attr, char *buf, | |
744 | loff_t pos, size_t count) | |
745 | { | |
746 | memcpy(buf, attr->private + pos, count); | |
747 | return count; | |
748 | } | |
749 | ||
750 | static BIN_ATTR(smbios_entry_point, S_IRUSR, raw_table_read, NULL, 0); | |
751 | static BIN_ATTR(DMI, S_IRUSR, raw_table_read, NULL, 0); | |
752 | ||
753 | static int __init dmi_init(void) | |
754 | { | |
755 | struct kobject *tables_kobj; | |
756 | u8 *dmi_table; | |
757 | int ret = -ENOMEM; | |
758 | ||
a81114d0 AB |
759 | if (!dmi_available) |
760 | return 0; | |
d7f96f97 IK |
761 | |
762 | /* | |
763 | * Set up dmi directory at /sys/firmware/dmi. This entry should stay | |
764 | * even after farther error, as it can be used by other modules like | |
765 | * dmi-sysfs. | |
766 | */ | |
767 | dmi_kobj = kobject_create_and_add("dmi", firmware_kobj); | |
768 | if (!dmi_kobj) | |
769 | goto err; | |
770 | ||
771 | tables_kobj = kobject_create_and_add("tables", dmi_kobj); | |
772 | if (!tables_kobj) | |
773 | goto err; | |
774 | ||
775 | dmi_table = dmi_remap(dmi_base, dmi_len); | |
776 | if (!dmi_table) | |
777 | goto err_tables; | |
778 | ||
779 | bin_attr_smbios_entry_point.size = smbios_entry_point_size; | |
780 | bin_attr_smbios_entry_point.private = smbios_entry_point; | |
781 | ret = sysfs_create_bin_file(tables_kobj, &bin_attr_smbios_entry_point); | |
782 | if (ret) | |
783 | goto err_unmap; | |
784 | ||
785 | bin_attr_DMI.size = dmi_len; | |
786 | bin_attr_DMI.private = dmi_table; | |
787 | ret = sysfs_create_bin_file(tables_kobj, &bin_attr_DMI); | |
788 | if (!ret) | |
789 | return 0; | |
790 | ||
791 | sysfs_remove_bin_file(tables_kobj, | |
792 | &bin_attr_smbios_entry_point); | |
793 | err_unmap: | |
794 | dmi_unmap(dmi_table); | |
795 | err_tables: | |
796 | kobject_del(tables_kobj); | |
797 | kobject_put(tables_kobj); | |
798 | err: | |
799 | pr_err("dmi: Firmware registration failed.\n"); | |
800 | ||
801 | return ret; | |
802 | } | |
803 | subsys_initcall(dmi_init); | |
804 | ||
98e5e1bf | 805 | /** |
0fca0812 | 806 | * dmi_setup - scan and setup DMI system information |
98e5e1bf | 807 | * |
0fca0812 RR |
808 | * Scan the DMI system information. This setups DMI identifiers |
809 | * (dmi_system_id) for printing it out on task dumps and prepares | |
810 | * DIMM entry information (dmi_memdev_info) from the SMBIOS table | |
811 | * for using this when reporting memory errors. | |
98e5e1bf | 812 | */ |
0fca0812 | 813 | void __init dmi_setup(void) |
98e5e1bf | 814 | { |
0fca0812 RR |
815 | dmi_scan_machine(); |
816 | if (!dmi_available) | |
817 | return; | |
818 | ||
819 | dmi_memdev_walk(); | |
98e5e1bf TH |
820 | dump_stack_set_arch_desc("%s", dmi_ids_string); |
821 | } | |
822 | ||
d7b1956f RW |
823 | /** |
824 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
825 | * @dmi: pointer to the dmi_system_id structure to check | |
826 | */ | |
827 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
828 | { | |
829 | int i; | |
830 | ||
d7b1956f RW |
831 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { |
832 | int s = dmi->matches[i].slot; | |
833 | if (s == DMI_NONE) | |
75757507 | 834 | break; |
de40614d AH |
835 | if (s == DMI_OEM_STRING) { |
836 | /* DMI_OEM_STRING must be exact match */ | |
837 | const struct dmi_device *valid; | |
838 | ||
839 | valid = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, | |
840 | dmi->matches[i].substr, NULL); | |
841 | if (valid) | |
842 | continue; | |
843 | } else if (dmi_ident[s]) { | |
8cf4e6a0 JD |
844 | if (dmi->matches[i].exact_match) { |
845 | if (!strcmp(dmi_ident[s], | |
846 | dmi->matches[i].substr)) | |
847 | continue; | |
848 | } else { | |
849 | if (strstr(dmi_ident[s], | |
850 | dmi->matches[i].substr)) | |
851 | continue; | |
852 | } | |
5017b285 JN |
853 | } |
854 | ||
d7b1956f RW |
855 | /* No match */ |
856 | return false; | |
857 | } | |
858 | return true; | |
859 | } | |
860 | ||
75757507 DT |
861 | /** |
862 | * dmi_is_end_of_table - check for end-of-table marker | |
863 | * @dmi: pointer to the dmi_system_id structure to check | |
864 | */ | |
865 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
866 | { | |
867 | return dmi->matches[0].slot == DMI_NONE; | |
868 | } | |
869 | ||
1da177e4 LT |
870 | /** |
871 | * dmi_check_system - check system DMI data | |
872 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
873 | * All non-null elements of the list must match |
874 | * their slot's (field index's) data (i.e., each | |
875 | * list string must be a substring of the specified | |
876 | * DMI slot's string data) to be considered a | |
877 | * successful match. | |
1da177e4 LT |
878 | * |
879 | * Walk the blacklist table running matching functions until someone | |
880 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 881 | * each successful match. Returns the number of matches. |
7117794f | 882 | * |
0fca0812 | 883 | * dmi_setup must be called before this function is called. |
1da177e4 | 884 | */ |
1855256c | 885 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 886 | { |
d7b1956f RW |
887 | int count = 0; |
888 | const struct dmi_system_id *d; | |
889 | ||
75757507 | 890 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
891 | if (dmi_matches(d)) { |
892 | count++; | |
893 | if (d->callback && d->callback(d)) | |
894 | break; | |
1da177e4 | 895 | } |
1da177e4 LT |
896 | |
897 | return count; | |
898 | } | |
1da177e4 LT |
899 | EXPORT_SYMBOL(dmi_check_system); |
900 | ||
d7b1956f RW |
901 | /** |
902 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
903 | * @list: array of dmi_system_id structures to match against | |
904 | * All non-null elements of the list must match | |
905 | * their slot's (field index's) data (i.e., each | |
906 | * list string must be a substring of the specified | |
907 | * DMI slot's string data) to be considered a | |
908 | * successful match. | |
909 | * | |
910 | * Walk the blacklist table until the first match is found. Return the | |
911 | * pointer to the matching entry or NULL if there's no match. | |
7117794f | 912 | * |
0fca0812 | 913 | * dmi_setup must be called before this function is called. |
d7b1956f RW |
914 | */ |
915 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
916 | { | |
917 | const struct dmi_system_id *d; | |
918 | ||
75757507 | 919 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
920 | if (dmi_matches(d)) |
921 | return d; | |
922 | ||
923 | return NULL; | |
924 | } | |
925 | EXPORT_SYMBOL(dmi_first_match); | |
926 | ||
1da177e4 LT |
927 | /** |
928 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 929 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
930 | * |
931 | * Returns one DMI data value, can be used to perform | |
932 | * complex DMI data checks. | |
933 | */ | |
1855256c | 934 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
935 | { |
936 | return dmi_ident[field]; | |
937 | } | |
e70c9d5e | 938 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 939 | |
fd8cd7e1 | 940 | /** |
c2bacfc4 RD |
941 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
942 | * @str: string to check for | |
fd8cd7e1 AK |
943 | */ |
944 | int dmi_name_in_serial(const char *str) | |
945 | { | |
946 | int f = DMI_PRODUCT_SERIAL; | |
947 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
948 | return 1; | |
949 | return 0; | |
950 | } | |
a1bae672 AK |
951 | |
952 | /** | |
66e13e66 | 953 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
02d9c47f | 954 | * @str: Case sensitive Name |
a1bae672 | 955 | */ |
1855256c | 956 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 957 | { |
66e13e66 | 958 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
959 | int i; |
960 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
961 | int f = fields[i]; | |
962 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
963 | return 1; | |
964 | } | |
965 | return 0; | |
966 | } | |
967 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
968 | ||
ebad6a42 AP |
969 | /** |
970 | * dmi_find_device - find onboard device by type/name | |
971 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 972 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
973 | * @from: previous device found in search, or %NULL for new search. |
974 | * | |
975 | * Iterates through the list of known onboard devices. If a device is | |
bfab8b48 | 976 | * found with a matching @type and @name, a pointer to its device |
ebad6a42 | 977 | * structure is returned. Otherwise, %NULL is returned. |
b0ef371e | 978 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
979 | * If @from is not %NULL, searches continue from next device. |
980 | */ | |
02d9c47f | 981 | const struct dmi_device *dmi_find_device(int type, const char *name, |
1855256c | 982 | const struct dmi_device *from) |
ebad6a42 | 983 | { |
1855256c JG |
984 | const struct list_head *head = from ? &from->list : &dmi_devices; |
985 | struct list_head *d; | |
ebad6a42 | 986 | |
02d9c47f | 987 | for (d = head->next; d != &dmi_devices; d = d->next) { |
1855256c JG |
988 | const struct dmi_device *dev = |
989 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
990 | |
991 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
992 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
993 | return dev; | |
994 | } | |
995 | ||
996 | return NULL; | |
997 | } | |
998 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
999 | |
1000 | /** | |
3e5cd1f2 TH |
1001 | * dmi_get_date - parse a DMI date |
1002 | * @field: data index (see enum dmi_field) | |
1003 | * @yearp: optional out parameter for the year | |
1004 | * @monthp: optional out parameter for the month | |
1005 | * @dayp: optional out parameter for the day | |
f083a329 | 1006 | * |
3e5cd1f2 TH |
1007 | * The date field is assumed to be in the form resembling |
1008 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
1009 | * parameters any or all of which can be omitted. | |
1010 | * | |
1011 | * If the field doesn't exist, all out parameters are set to zero | |
1012 | * and false is returned. Otherwise, true is returned with any | |
1013 | * invalid part of date set to zero. | |
1014 | * | |
1015 | * On return, year, month and day are guaranteed to be in the | |
1016 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 1017 | */ |
3e5cd1f2 | 1018 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 1019 | { |
3e5cd1f2 TH |
1020 | int year = 0, month = 0, day = 0; |
1021 | bool exists; | |
1022 | const char *s, *y; | |
02c24fa8 | 1023 | char *e; |
f083a329 | 1024 | |
3e5cd1f2 TH |
1025 | s = dmi_get_system_info(field); |
1026 | exists = s; | |
1027 | if (!exists) | |
1028 | goto out; | |
f083a329 | 1029 | |
3e5cd1f2 TH |
1030 | /* |
1031 | * Determine year first. We assume the date string resembles | |
1032 | * mm/dd/yy[yy] but the original code extracted only the year | |
1033 | * from the end. Keep the behavior in the spirit of no | |
1034 | * surprises. | |
1035 | */ | |
1036 | y = strrchr(s, '/'); | |
1037 | if (!y) | |
1038 | goto out; | |
1039 | ||
1040 | y++; | |
1041 | year = simple_strtoul(y, &e, 10); | |
1042 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
1043 | year += 1900; |
1044 | if (year < 1996) /* no dates < spec 1.0 */ | |
1045 | year += 100; | |
1046 | } | |
3e5cd1f2 TH |
1047 | if (year > 9999) /* year should fit in %04d */ |
1048 | year = 0; | |
1049 | ||
1050 | /* parse the mm and dd */ | |
1051 | month = simple_strtoul(s, &e, 10); | |
1052 | if (s == e || *e != '/' || !month || month > 12) { | |
1053 | month = 0; | |
1054 | goto out; | |
1055 | } | |
f083a329 | 1056 | |
3e5cd1f2 TH |
1057 | s = e + 1; |
1058 | day = simple_strtoul(s, &e, 10); | |
1059 | if (s == y || s == e || *e != '/' || day > 31) | |
1060 | day = 0; | |
1061 | out: | |
1062 | if (yearp) | |
1063 | *yearp = year; | |
1064 | if (monthp) | |
1065 | *monthp = month; | |
1066 | if (dayp) | |
1067 | *dayp = day; | |
1068 | return exists; | |
f083a329 | 1069 | } |
3e5cd1f2 | 1070 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a | 1071 | |
3af34525 AS |
1072 | /** |
1073 | * dmi_get_bios_year - get a year out of DMI_BIOS_DATE field | |
1074 | * | |
1075 | * Returns year on success, -ENXIO if DMI is not selected, | |
1076 | * or a different negative error code if DMI field is not present | |
1077 | * or not parseable. | |
1078 | */ | |
1079 | int dmi_get_bios_year(void) | |
1080 | { | |
1081 | bool exists; | |
1082 | int year; | |
1083 | ||
1084 | exists = dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL); | |
1085 | if (!exists) | |
1086 | return -ENODATA; | |
1087 | ||
1088 | return year ? year : -ERANGE; | |
1089 | } | |
1090 | EXPORT_SYMBOL(dmi_get_bios_year); | |
1091 | ||
7fce084a JD |
1092 | /** |
1093 | * dmi_walk - Walk the DMI table and get called back for every record | |
1094 | * @decode: Callback function | |
e7a19c56 | 1095 | * @private_data: Private data to be passed to the callback function |
7fce084a | 1096 | * |
c9268200 AL |
1097 | * Returns 0 on success, -ENXIO if DMI is not selected or not present, |
1098 | * or a different negative error code if DMI walking fails. | |
7fce084a | 1099 | */ |
e7a19c56 JD |
1100 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
1101 | void *private_data) | |
7fce084a JD |
1102 | { |
1103 | u8 *buf; | |
1104 | ||
1105 | if (!dmi_available) | |
c9268200 | 1106 | return -ENXIO; |
7fce084a | 1107 | |
cf074402 | 1108 | buf = dmi_remap(dmi_base, dmi_len); |
7fce084a | 1109 | if (buf == NULL) |
c9268200 | 1110 | return -ENOMEM; |
7fce084a | 1111 | |
eb4c5ea5 | 1112 | dmi_decode_table(buf, decode, private_data); |
7fce084a | 1113 | |
cf074402 | 1114 | dmi_unmap(buf); |
7fce084a JD |
1115 | return 0; |
1116 | } | |
1117 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
1118 | |
1119 | /** | |
1120 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
1121 | * @f: DMI field identifier |
1122 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
1123 | * |
1124 | * Returns true if the requested field equals to the str (including NULL). | |
1125 | */ | |
1126 | bool dmi_match(enum dmi_field f, const char *str) | |
1127 | { | |
1128 | const char *info = dmi_get_system_info(f); | |
1129 | ||
1130 | if (info == NULL || str == NULL) | |
1131 | return info == str; | |
1132 | ||
1133 | return !strcmp(info, str); | |
1134 | } | |
1135 | EXPORT_SYMBOL_GPL(dmi_match); | |
dd6dad42 CG |
1136 | |
1137 | void dmi_memdev_name(u16 handle, const char **bank, const char **device) | |
1138 | { | |
1139 | int n; | |
1140 | ||
1141 | if (dmi_memdev == NULL) | |
1142 | return; | |
1143 | ||
1144 | for (n = 0; n < dmi_memdev_nr; n++) { | |
1145 | if (handle == dmi_memdev[n].handle) { | |
1146 | *bank = dmi_memdev[n].bank; | |
1147 | *device = dmi_memdev[n].device; | |
1148 | break; | |
1149 | } | |
1150 | } | |
1151 | } | |
1152 | EXPORT_SYMBOL_GPL(dmi_memdev_name); | |
6deae96b TL |
1153 | |
1154 | u64 dmi_memdev_size(u16 handle) | |
1155 | { | |
1156 | int n; | |
1157 | ||
1158 | if (dmi_memdev) { | |
1159 | for (n = 0; n < dmi_memdev_nr; n++) { | |
1160 | if (handle == dmi_memdev[n].handle) | |
1161 | return dmi_memdev[n].size; | |
1162 | } | |
1163 | } | |
1164 | return ~0ull; | |
1165 | } | |
1166 | EXPORT_SYMBOL_GPL(dmi_memdev_size); | |
9e0afe39 JD |
1167 | |
1168 | /** | |
1169 | * dmi_memdev_type - get the memory type | |
1170 | * @handle: DMI structure handle | |
1171 | * | |
1172 | * Return the DMI memory type of the module in the slot associated with the | |
1173 | * given DMI handle, or 0x0 if no such DMI handle exists. | |
1174 | */ | |
1175 | u8 dmi_memdev_type(u16 handle) | |
1176 | { | |
1177 | int n; | |
1178 | ||
1179 | if (dmi_memdev) { | |
1180 | for (n = 0; n < dmi_memdev_nr; n++) { | |
1181 | if (handle == dmi_memdev[n].handle) | |
1182 | return dmi_memdev[n].type; | |
1183 | } | |
1184 | } | |
1185 | return 0x0; /* Not a valid value */ | |
1186 | } | |
1187 | EXPORT_SYMBOL_GPL(dmi_memdev_type); | |
7c237880 JD |
1188 | |
1189 | /** | |
1190 | * dmi_memdev_handle - get the DMI handle of a memory slot | |
1191 | * @slot: slot number | |
1192 | * | |
1193 | * Return the DMI handle associated with a given memory slot, or %0xFFFF | |
1194 | * if there is no such slot. | |
1195 | */ | |
1196 | u16 dmi_memdev_handle(int slot) | |
1197 | { | |
1198 | if (dmi_memdev && slot >= 0 && slot < dmi_memdev_nr) | |
1199 | return dmi_memdev[slot].handle; | |
1200 | ||
1201 | return 0xffff; /* Not a valid value */ | |
1202 | } | |
1203 | EXPORT_SYMBOL_GPL(dmi_memdev_handle); |