Commit | Line | Data |
---|---|---|
1da177e4 | 1 | #include <linux/types.h> |
1da177e4 LT |
2 | #include <linux/string.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/module.h> | |
8881cdce | 5 | #include <linux/ctype.h> |
1da177e4 | 6 | #include <linux/dmi.h> |
3ed3bce8 | 7 | #include <linux/efi.h> |
1da177e4 | 8 | #include <linux/bootmem.h> |
d114a333 | 9 | #include <linux/random.h> |
f2d3efed | 10 | #include <asm/dmi.h> |
1da177e4 | 11 | |
cb5dd7c1 PJ |
12 | /* |
13 | * DMI stands for "Desktop Management Interface". It is part | |
14 | * of and an antecedent to, SMBIOS, which stands for System | |
15 | * Management BIOS. See further: http://www.dmtf.org/standards | |
16 | */ | |
ffbbb96d | 17 | static const char dmi_empty_string[] = " "; |
79da4721 | 18 | |
f1d8e614 | 19 | static u16 __initdata dmi_ver; |
9a22b6e7 IM |
20 | /* |
21 | * Catch too early calls to dmi_check_system(): | |
22 | */ | |
23 | static int dmi_initialized; | |
24 | ||
c90fe6bc TH |
25 | /* DMI system identification string used during boot */ |
26 | static char dmi_ids_string[128] __initdata; | |
27 | ||
f3069ae9 | 28 | static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s) |
1da177e4 | 29 | { |
1855256c | 30 | const u8 *bp = ((u8 *) dm) + dm->length; |
1249c513 | 31 | |
c3c7120d | 32 | if (s) { |
1da177e4 | 33 | s--; |
c3c7120d AP |
34 | while (s > 0 && *bp) { |
35 | bp += strlen(bp) + 1; | |
36 | s--; | |
37 | } | |
38 | ||
39 | if (*bp != 0) { | |
79da4721 PW |
40 | size_t len = strlen(bp)+1; |
41 | size_t cmp_len = len > 8 ? 8 : len; | |
42 | ||
43 | if (!memcmp(bp, dmi_empty_string, cmp_len)) | |
44 | return dmi_empty_string; | |
f3069ae9 | 45 | return bp; |
c3c7120d | 46 | } |
4f705ae3 | 47 | } |
c3c7120d | 48 | |
f3069ae9 JD |
49 | return ""; |
50 | } | |
51 | ||
ffbbb96d | 52 | static const char * __init dmi_string(const struct dmi_header *dm, u8 s) |
f3069ae9 JD |
53 | { |
54 | const char *bp = dmi_string_nosave(dm, s); | |
55 | char *str; | |
56 | size_t len; | |
57 | ||
58 | if (bp == dmi_empty_string) | |
59 | return dmi_empty_string; | |
60 | ||
61 | len = strlen(bp) + 1; | |
62 | str = dmi_alloc(len); | |
63 | if (str != NULL) | |
64 | strcpy(str, bp); | |
f3069ae9 | 65 | |
c3c7120d | 66 | return str; |
1da177e4 LT |
67 | } |
68 | ||
69 | /* | |
70 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
71 | * pointing to completely the wrong place for example | |
72 | */ | |
7fce084a | 73 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
74 | void (*decode)(const struct dmi_header *, void *), |
75 | void *private_data) | |
1da177e4 | 76 | { |
7fce084a | 77 | u8 *data = buf; |
1249c513 | 78 | int i = 0; |
4f705ae3 | 79 | |
1da177e4 | 80 | /* |
4f705ae3 BH |
81 | * Stop when we see all the items the table claimed to have |
82 | * OR we run off the end of the table (also happens) | |
83 | */ | |
1249c513 | 84 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
85 | const struct dmi_header *dm = (const struct dmi_header *)data; |
86 | ||
1da177e4 | 87 | /* |
8638545c AC |
88 | * We want to know the total length (formatted area and |
89 | * strings) before decoding to make sure we won't run off the | |
90 | * table in dmi_decode or dmi_string | |
1da177e4 | 91 | */ |
1249c513 AP |
92 | data += dm->length; |
93 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 94 | data++; |
1249c513 | 95 | if (data - buf < len - 1) |
e7a19c56 | 96 | decode(dm, private_data); |
1249c513 | 97 | data += 2; |
1da177e4 LT |
98 | i++; |
99 | } | |
7fce084a JD |
100 | } |
101 | ||
102 | static u32 dmi_base; | |
103 | static u16 dmi_len; | |
104 | static u16 dmi_num; | |
105 | ||
e7a19c56 JD |
106 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
107 | void *)) | |
7fce084a JD |
108 | { |
109 | u8 *buf; | |
110 | ||
111 | buf = dmi_ioremap(dmi_base, dmi_len); | |
112 | if (buf == NULL) | |
113 | return -1; | |
114 | ||
e7a19c56 | 115 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 116 | |
d114a333 TL |
117 | add_device_randomness(buf, dmi_len); |
118 | ||
7fce084a | 119 | dmi_iounmap(buf, dmi_len); |
1da177e4 LT |
120 | return 0; |
121 | } | |
122 | ||
9f9c9cbb | 123 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 124 | { |
1249c513 | 125 | u8 sum = 0; |
1da177e4 | 126 | int a; |
4f705ae3 | 127 | |
9f9c9cbb | 128 | for (a = 0; a < len; a++) |
1249c513 AP |
129 | sum += buf[a]; |
130 | ||
131 | return sum == 0; | |
1da177e4 LT |
132 | } |
133 | ||
ffbbb96d | 134 | static const char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 135 | static LIST_HEAD(dmi_devices); |
4f5c791a | 136 | int dmi_available; |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Save a DMI string | |
140 | */ | |
02d9c47f JD |
141 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, |
142 | int string) | |
1da177e4 | 143 | { |
02d9c47f | 144 | const char *d = (const char *) dm; |
ffbbb96d | 145 | const char *p; |
1249c513 | 146 | |
1da177e4 LT |
147 | if (dmi_ident[slot]) |
148 | return; | |
1249c513 | 149 | |
c3c7120d AP |
150 | p = dmi_string(dm, d[string]); |
151 | if (p == NULL) | |
152 | return; | |
153 | ||
154 | dmi_ident[slot] = p; | |
1da177e4 LT |
155 | } |
156 | ||
02d9c47f JD |
157 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, |
158 | int index) | |
4f5c791a | 159 | { |
02d9c47f | 160 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
161 | char *s; |
162 | int is_ff = 1, is_00 = 1, i; | |
163 | ||
164 | if (dmi_ident[slot]) | |
165 | return; | |
166 | ||
167 | for (i = 0; i < 16 && (is_ff || is_00); i++) { | |
f1d8e614 ZD |
168 | if (d[i] != 0x00) |
169 | is_00 = 0; | |
170 | if (d[i] != 0xFF) | |
171 | is_ff = 0; | |
4f5c791a LP |
172 | } |
173 | ||
174 | if (is_ff || is_00) | |
175 | return; | |
176 | ||
177 | s = dmi_alloc(16*2+4+1); | |
178 | if (!s) | |
179 | return; | |
180 | ||
f1d8e614 ZD |
181 | /* |
182 | * As of version 2.6 of the SMBIOS specification, the first 3 fields of | |
183 | * the UUID are supposed to be little-endian encoded. The specification | |
184 | * says that this is the defacto standard. | |
185 | */ | |
186 | if (dmi_ver >= 0x0206) | |
187 | sprintf(s, "%pUL", d); | |
188 | else | |
189 | sprintf(s, "%pUB", d); | |
4f5c791a | 190 | |
02d9c47f | 191 | dmi_ident[slot] = s; |
4f5c791a LP |
192 | } |
193 | ||
02d9c47f JD |
194 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, |
195 | int index) | |
4f5c791a | 196 | { |
02d9c47f | 197 | const u8 *d = (u8 *) dm + index; |
4f5c791a LP |
198 | char *s; |
199 | ||
200 | if (dmi_ident[slot]) | |
201 | return; | |
202 | ||
203 | s = dmi_alloc(4); | |
204 | if (!s) | |
205 | return; | |
206 | ||
207 | sprintf(s, "%u", *d & 0x7F); | |
208 | dmi_ident[slot] = s; | |
209 | } | |
210 | ||
f3069ae9 JD |
211 | static void __init dmi_save_one_device(int type, const char *name) |
212 | { | |
213 | struct dmi_device *dev; | |
214 | ||
215 | /* No duplicate device */ | |
216 | if (dmi_find_device(type, name, NULL)) | |
217 | return; | |
218 | ||
219 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
ae797449 | 220 | if (!dev) |
f3069ae9 | 221 | return; |
f3069ae9 JD |
222 | |
223 | dev->type = type; | |
224 | strcpy((char *)(dev + 1), name); | |
225 | dev->name = (char *)(dev + 1); | |
226 | dev->device_data = NULL; | |
227 | list_add(&dev->list, &dmi_devices); | |
228 | } | |
229 | ||
1855256c | 230 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
231 | { |
232 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
233 | |
234 | for (i = 0; i < count; i++) { | |
1855256c | 235 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
236 | |
237 | /* Skip disabled device */ | |
238 | if ((*d & 0x80) == 0) | |
239 | continue; | |
240 | ||
f3069ae9 | 241 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
242 | } |
243 | } | |
244 | ||
1855256c | 245 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
246 | { |
247 | int i, count = *(u8 *)(dm + 1); | |
248 | struct dmi_device *dev; | |
249 | ||
250 | for (i = 1; i <= count; i++) { | |
ffbbb96d | 251 | const char *devname = dmi_string(dm, i); |
79da4721 | 252 | |
43fe105a | 253 | if (devname == dmi_empty_string) |
79da4721 | 254 | continue; |
79da4721 | 255 | |
2e0c1f6c | 256 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 257 | if (!dev) |
2e0c1f6c | 258 | break; |
2e0c1f6c SM |
259 | |
260 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 261 | dev->name = devname; |
2e0c1f6c | 262 | dev->device_data = NULL; |
ebad6a42 AP |
263 | |
264 | list_add(&dev->list, &dmi_devices); | |
265 | } | |
266 | } | |
267 | ||
1855256c | 268 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
269 | { |
270 | struct dmi_device *dev; | |
02d9c47f | 271 | void *data; |
ebad6a42 | 272 | |
e9928674 | 273 | data = dmi_alloc(dm->length); |
ae797449 | 274 | if (data == NULL) |
ebad6a42 | 275 | return; |
ebad6a42 AP |
276 | |
277 | memcpy(data, dm, dm->length); | |
278 | ||
e9928674 | 279 | dev = dmi_alloc(sizeof(*dev)); |
ae797449 | 280 | if (!dev) |
ebad6a42 | 281 | return; |
ebad6a42 AP |
282 | |
283 | dev->type = DMI_DEV_TYPE_IPMI; | |
284 | dev->name = "IPMI controller"; | |
285 | dev->device_data = data; | |
286 | ||
abd24df8 | 287 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
288 | } |
289 | ||
911e1c9b N |
290 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
291 | int devfn, const char *name) | |
292 | { | |
293 | struct dmi_dev_onboard *onboard_dev; | |
294 | ||
295 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
ae797449 | 296 | if (!onboard_dev) |
911e1c9b | 297 | return; |
ae797449 | 298 | |
911e1c9b N |
299 | onboard_dev->instance = instance; |
300 | onboard_dev->segment = segment; | |
301 | onboard_dev->bus = bus; | |
302 | onboard_dev->devfn = devfn; | |
303 | ||
304 | strcpy((char *)&onboard_dev[1], name); | |
305 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
306 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
307 | onboard_dev->dev.device_data = onboard_dev; | |
308 | ||
309 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
310 | } | |
311 | ||
b4bd7d59 WVS |
312 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
313 | { | |
02d9c47f | 314 | const u8 *d = (u8 *) dm + 5; |
b4bd7d59 WVS |
315 | |
316 | /* Skip disabled device */ | |
317 | if ((*d & 0x80) == 0) | |
318 | return; | |
319 | ||
911e1c9b N |
320 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
321 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 322 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
323 | } |
324 | ||
1da177e4 LT |
325 | /* |
326 | * Process a DMI table entry. Right now all we care about are the BIOS | |
327 | * and machine entries. For 2.5 we should pull the smbus controller info | |
328 | * out of here. | |
329 | */ | |
e7a19c56 | 330 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 331 | { |
02d9c47f | 332 | switch (dm->type) { |
ebad6a42 | 333 | case 0: /* BIOS Information */ |
1249c513 | 334 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 335 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
336 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
337 | break; | |
ebad6a42 | 338 | case 1: /* System Information */ |
1249c513 | 339 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 340 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 341 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 342 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 343 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 344 | break; |
ebad6a42 | 345 | case 2: /* Base Board Information */ |
1249c513 | 346 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 347 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 348 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
349 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
350 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
351 | break; | |
352 | case 3: /* Chassis Information */ | |
353 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
354 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
355 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
356 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
357 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 358 | break; |
ebad6a42 AP |
359 | case 10: /* Onboard Devices Information */ |
360 | dmi_save_devices(dm); | |
361 | break; | |
2e0c1f6c SM |
362 | case 11: /* OEM Strings */ |
363 | dmi_save_oem_strings_devices(dm); | |
364 | break; | |
ebad6a42 AP |
365 | case 38: /* IPMI Device Information */ |
366 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
367 | break; |
368 | case 41: /* Onboard Devices Extended Information */ | |
369 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
370 | } |
371 | } | |
372 | ||
c90fe6bc | 373 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 374 | { |
c90fe6bc | 375 | int c = 0; |
8881cdce BH |
376 | const char *p; |
377 | ||
378 | if (!info) | |
c90fe6bc | 379 | return c; |
8881cdce BH |
380 | |
381 | for (p = info; *p; p++) | |
382 | if (isprint(*p)) | |
c90fe6bc | 383 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 384 | else |
c90fe6bc TH |
385 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
386 | return c; | |
8881cdce BH |
387 | } |
388 | ||
c90fe6bc | 389 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 390 | { |
c90fe6bc | 391 | int c = 0; |
84e383b3 NC |
392 | const char *board; /* Board Name is optional */ |
393 | ||
c90fe6bc TH |
394 | c += print_filtered(buf + c, len - c, |
395 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
396 | c += scnprintf(buf + c, len - c, " "); | |
397 | c += print_filtered(buf + c, len - c, | |
398 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
399 | ||
84e383b3 NC |
400 | board = dmi_get_system_info(DMI_BOARD_NAME); |
401 | if (board) { | |
c90fe6bc TH |
402 | c += scnprintf(buf + c, len - c, "/"); |
403 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 404 | } |
c90fe6bc TH |
405 | c += scnprintf(buf + c, len - c, ", BIOS "); |
406 | c += print_filtered(buf + c, len - c, | |
407 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
408 | c += scnprintf(buf + c, len - c, " "); | |
409 | c += print_filtered(buf + c, len - c, | |
410 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
411 | } |
412 | ||
d39de28c BH |
413 | /* |
414 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
415 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
416 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
417 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
418 | * takes precedence) and return 0. Otherwise return 1. | |
419 | */ | |
79bae42d | 420 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 421 | { |
79bae42d | 422 | int smbios_ver; |
1855256c | 423 | |
79bae42d BH |
424 | if (memcmp(buf, "_SM_", 4) == 0 && |
425 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
426 | smbios_ver = (buf[6] << 8) + buf[7]; | |
427 | ||
428 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
429 | switch (smbios_ver) { | |
430 | case 0x021F: | |
431 | case 0x0221: | |
432 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", | |
433 | smbios_ver & 0xFF, 3); | |
434 | smbios_ver = 0x0203; | |
435 | break; | |
436 | case 0x0233: | |
437 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6); | |
438 | smbios_ver = 0x0206; | |
439 | break; | |
440 | } | |
441 | } else { | |
442 | smbios_ver = 0; | |
443 | } | |
444 | ||
445 | buf += 16; | |
446 | ||
447 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
7fce084a JD |
448 | dmi_num = (buf[13] << 8) | buf[12]; |
449 | dmi_len = (buf[7] << 8) | buf[6]; | |
450 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 451 | (buf[9] << 8) | buf[8]; |
61e032fa | 452 | |
8881cdce | 453 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d BH |
454 | if (smbios_ver) { |
455 | dmi_ver = smbios_ver; | |
9f9c9cbb ZD |
456 | pr_info("SMBIOS %d.%d present.\n", |
457 | dmi_ver >> 8, dmi_ver & 0xFF); | |
79bae42d | 458 | } else { |
9f9c9cbb ZD |
459 | dmi_ver = (buf[14] & 0xF0) << 4 | |
460 | (buf[14] & 0x0F); | |
461 | pr_info("Legacy DMI %d.%d present.\n", | |
462 | dmi_ver >> 8, dmi_ver & 0xFF); | |
463 | } | |
c90fe6bc TH |
464 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
465 | printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); | |
3ed3bce8 | 466 | return 0; |
8881cdce | 467 | } |
3ed3bce8 | 468 | } |
61e032fa | 469 | |
a40e7cf8 | 470 | return 1; |
9f9c9cbb ZD |
471 | } |
472 | ||
3ed3bce8 MD |
473 | void __init dmi_scan_machine(void) |
474 | { | |
475 | char __iomem *p, *q; | |
79bae42d | 476 | char buf[32]; |
3ed3bce8 | 477 | |
83e68189 | 478 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 479 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 480 | goto error; |
3ed3bce8 | 481 | |
4f5c791a LP |
482 | /* This is called as a core_initcall() because it isn't |
483 | * needed during early boot. This also means we can | |
484 | * iounmap the space when we're done with it. | |
485 | */ | |
b2c99e3c | 486 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 487 | if (p == NULL) |
9a22b6e7 | 488 | goto error; |
79bae42d | 489 | memcpy_fromio(buf, p, 32); |
23dd842c | 490 | dmi_iounmap(p, 32); |
79bae42d BH |
491 | |
492 | if (!dmi_present(buf)) { | |
4f5c791a | 493 | dmi_available = 1; |
9a22b6e7 | 494 | goto out; |
4f5c791a | 495 | } |
02d9c47f | 496 | } else { |
3ed3bce8 MD |
497 | p = dmi_ioremap(0xF0000, 0x10000); |
498 | if (p == NULL) | |
9a22b6e7 | 499 | goto error; |
3ed3bce8 | 500 | |
d39de28c BH |
501 | /* |
502 | * Iterate over all possible DMI header addresses q. | |
503 | * Maintain the 32 bytes around q in buf. On the | |
504 | * first iteration, substitute zero for the | |
505 | * out-of-range bytes so there is no chance of falsely | |
506 | * detecting an SMBIOS header. | |
507 | */ | |
79bae42d | 508 | memset(buf, 0, 16); |
3ed3bce8 | 509 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d BH |
510 | memcpy_fromio(buf + 16, q, 16); |
511 | if (!dmi_present(buf)) { | |
4f5c791a | 512 | dmi_available = 1; |
0d64484f | 513 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 514 | goto out; |
4f5c791a | 515 | } |
79bae42d | 516 | memcpy(buf, buf + 16, 16); |
61e032fa | 517 | } |
3212bff3 | 518 | dmi_iounmap(p, 0x10000); |
61e032fa | 519 | } |
9a22b6e7 | 520 | error: |
02d9c47f | 521 | pr_info("DMI not present or invalid.\n"); |
9a22b6e7 IM |
522 | out: |
523 | dmi_initialized = 1; | |
1da177e4 LT |
524 | } |
525 | ||
98e5e1bf TH |
526 | /** |
527 | * dmi_set_dump_stack_arch_desc - set arch description for dump_stack() | |
528 | * | |
529 | * Invoke dump_stack_set_arch_desc() with DMI system information so that | |
530 | * DMI identifiers are printed out on task dumps. Arch boot code should | |
531 | * call this function after dmi_scan_machine() if it wants to print out DMI | |
532 | * identifiers on task dumps. | |
533 | */ | |
534 | void __init dmi_set_dump_stack_arch_desc(void) | |
535 | { | |
536 | dump_stack_set_arch_desc("%s", dmi_ids_string); | |
537 | } | |
538 | ||
d7b1956f RW |
539 | /** |
540 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
541 | * @dmi: pointer to the dmi_system_id structure to check | |
542 | */ | |
543 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
544 | { | |
545 | int i; | |
546 | ||
547 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
548 | ||
549 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
550 | int s = dmi->matches[i].slot; | |
551 | if (s == DMI_NONE) | |
75757507 | 552 | break; |
5017b285 JN |
553 | if (dmi_ident[s]) { |
554 | if (!dmi->matches[i].exact_match && | |
555 | strstr(dmi_ident[s], dmi->matches[i].substr)) | |
556 | continue; | |
557 | else if (dmi->matches[i].exact_match && | |
558 | !strcmp(dmi_ident[s], dmi->matches[i].substr)) | |
559 | continue; | |
560 | } | |
561 | ||
d7b1956f RW |
562 | /* No match */ |
563 | return false; | |
564 | } | |
565 | return true; | |
566 | } | |
567 | ||
75757507 DT |
568 | /** |
569 | * dmi_is_end_of_table - check for end-of-table marker | |
570 | * @dmi: pointer to the dmi_system_id structure to check | |
571 | */ | |
572 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
573 | { | |
574 | return dmi->matches[0].slot == DMI_NONE; | |
575 | } | |
576 | ||
1da177e4 LT |
577 | /** |
578 | * dmi_check_system - check system DMI data | |
579 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
580 | * All non-null elements of the list must match |
581 | * their slot's (field index's) data (i.e., each | |
582 | * list string must be a substring of the specified | |
583 | * DMI slot's string data) to be considered a | |
584 | * successful match. | |
1da177e4 LT |
585 | * |
586 | * Walk the blacklist table running matching functions until someone | |
587 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 588 | * each successful match. Returns the number of matches. |
1da177e4 | 589 | */ |
1855256c | 590 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 591 | { |
d7b1956f RW |
592 | int count = 0; |
593 | const struct dmi_system_id *d; | |
594 | ||
75757507 | 595 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
596 | if (dmi_matches(d)) { |
597 | count++; | |
598 | if (d->callback && d->callback(d)) | |
599 | break; | |
1da177e4 | 600 | } |
1da177e4 LT |
601 | |
602 | return count; | |
603 | } | |
1da177e4 LT |
604 | EXPORT_SYMBOL(dmi_check_system); |
605 | ||
d7b1956f RW |
606 | /** |
607 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
608 | * @list: array of dmi_system_id structures to match against | |
609 | * All non-null elements of the list must match | |
610 | * their slot's (field index's) data (i.e., each | |
611 | * list string must be a substring of the specified | |
612 | * DMI slot's string data) to be considered a | |
613 | * successful match. | |
614 | * | |
615 | * Walk the blacklist table until the first match is found. Return the | |
616 | * pointer to the matching entry or NULL if there's no match. | |
617 | */ | |
618 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
619 | { | |
620 | const struct dmi_system_id *d; | |
621 | ||
75757507 | 622 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
623 | if (dmi_matches(d)) |
624 | return d; | |
625 | ||
626 | return NULL; | |
627 | } | |
628 | EXPORT_SYMBOL(dmi_first_match); | |
629 | ||
1da177e4 LT |
630 | /** |
631 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 632 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
633 | * |
634 | * Returns one DMI data value, can be used to perform | |
635 | * complex DMI data checks. | |
636 | */ | |
1855256c | 637 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
638 | { |
639 | return dmi_ident[field]; | |
640 | } | |
e70c9d5e | 641 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 642 | |
fd8cd7e1 | 643 | /** |
c2bacfc4 RD |
644 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
645 | * @str: string to check for | |
fd8cd7e1 AK |
646 | */ |
647 | int dmi_name_in_serial(const char *str) | |
648 | { | |
649 | int f = DMI_PRODUCT_SERIAL; | |
650 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
651 | return 1; | |
652 | return 0; | |
653 | } | |
a1bae672 AK |
654 | |
655 | /** | |
66e13e66 | 656 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
02d9c47f | 657 | * @str: Case sensitive Name |
a1bae672 | 658 | */ |
1855256c | 659 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 660 | { |
66e13e66 | 661 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
662 | int i; |
663 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
664 | int f = fields[i]; | |
665 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
666 | return 1; | |
667 | } | |
668 | return 0; | |
669 | } | |
670 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
671 | ||
ebad6a42 AP |
672 | /** |
673 | * dmi_find_device - find onboard device by type/name | |
674 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 675 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
676 | * @from: previous device found in search, or %NULL for new search. |
677 | * | |
678 | * Iterates through the list of known onboard devices. If a device is | |
679 | * found with a matching @vendor and @device, a pointer to its device | |
680 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 681 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
682 | * If @from is not %NULL, searches continue from next device. |
683 | */ | |
02d9c47f | 684 | const struct dmi_device *dmi_find_device(int type, const char *name, |
1855256c | 685 | const struct dmi_device *from) |
ebad6a42 | 686 | { |
1855256c JG |
687 | const struct list_head *head = from ? &from->list : &dmi_devices; |
688 | struct list_head *d; | |
ebad6a42 | 689 | |
02d9c47f | 690 | for (d = head->next; d != &dmi_devices; d = d->next) { |
1855256c JG |
691 | const struct dmi_device *dev = |
692 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
693 | |
694 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
695 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
696 | return dev; | |
697 | } | |
698 | ||
699 | return NULL; | |
700 | } | |
701 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
702 | |
703 | /** | |
3e5cd1f2 TH |
704 | * dmi_get_date - parse a DMI date |
705 | * @field: data index (see enum dmi_field) | |
706 | * @yearp: optional out parameter for the year | |
707 | * @monthp: optional out parameter for the month | |
708 | * @dayp: optional out parameter for the day | |
f083a329 | 709 | * |
3e5cd1f2 TH |
710 | * The date field is assumed to be in the form resembling |
711 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
712 | * parameters any or all of which can be omitted. | |
713 | * | |
714 | * If the field doesn't exist, all out parameters are set to zero | |
715 | * and false is returned. Otherwise, true is returned with any | |
716 | * invalid part of date set to zero. | |
717 | * | |
718 | * On return, year, month and day are guaranteed to be in the | |
719 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 720 | */ |
3e5cd1f2 | 721 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 722 | { |
3e5cd1f2 TH |
723 | int year = 0, month = 0, day = 0; |
724 | bool exists; | |
725 | const char *s, *y; | |
02c24fa8 | 726 | char *e; |
f083a329 | 727 | |
3e5cd1f2 TH |
728 | s = dmi_get_system_info(field); |
729 | exists = s; | |
730 | if (!exists) | |
731 | goto out; | |
f083a329 | 732 | |
3e5cd1f2 TH |
733 | /* |
734 | * Determine year first. We assume the date string resembles | |
735 | * mm/dd/yy[yy] but the original code extracted only the year | |
736 | * from the end. Keep the behavior in the spirit of no | |
737 | * surprises. | |
738 | */ | |
739 | y = strrchr(s, '/'); | |
740 | if (!y) | |
741 | goto out; | |
742 | ||
743 | y++; | |
744 | year = simple_strtoul(y, &e, 10); | |
745 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
746 | year += 1900; |
747 | if (year < 1996) /* no dates < spec 1.0 */ | |
748 | year += 100; | |
749 | } | |
3e5cd1f2 TH |
750 | if (year > 9999) /* year should fit in %04d */ |
751 | year = 0; | |
752 | ||
753 | /* parse the mm and dd */ | |
754 | month = simple_strtoul(s, &e, 10); | |
755 | if (s == e || *e != '/' || !month || month > 12) { | |
756 | month = 0; | |
757 | goto out; | |
758 | } | |
f083a329 | 759 | |
3e5cd1f2 TH |
760 | s = e + 1; |
761 | day = simple_strtoul(s, &e, 10); | |
762 | if (s == y || s == e || *e != '/' || day > 31) | |
763 | day = 0; | |
764 | out: | |
765 | if (yearp) | |
766 | *yearp = year; | |
767 | if (monthp) | |
768 | *monthp = month; | |
769 | if (dayp) | |
770 | *dayp = day; | |
771 | return exists; | |
f083a329 | 772 | } |
3e5cd1f2 | 773 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
774 | |
775 | /** | |
776 | * dmi_walk - Walk the DMI table and get called back for every record | |
777 | * @decode: Callback function | |
e7a19c56 | 778 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
779 | * |
780 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
781 | */ | |
e7a19c56 JD |
782 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
783 | void *private_data) | |
7fce084a JD |
784 | { |
785 | u8 *buf; | |
786 | ||
787 | if (!dmi_available) | |
788 | return -1; | |
789 | ||
790 | buf = ioremap(dmi_base, dmi_len); | |
791 | if (buf == NULL) | |
792 | return -1; | |
793 | ||
e7a19c56 | 794 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a JD |
795 | |
796 | iounmap(buf); | |
797 | return 0; | |
798 | } | |
799 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
800 | |
801 | /** | |
802 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
803 | * @f: DMI field identifier |
804 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
805 | * |
806 | * Returns true if the requested field equals to the str (including NULL). | |
807 | */ | |
808 | bool dmi_match(enum dmi_field f, const char *str) | |
809 | { | |
810 | const char *info = dmi_get_system_info(f); | |
811 | ||
812 | if (info == NULL || str == NULL) | |
813 | return info == str; | |
814 | ||
815 | return !strcmp(info, str); | |
816 | } | |
817 | EXPORT_SYMBOL_GPL(dmi_match); |