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