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