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 | */ | |
79da4721 PW |
17 | static char dmi_empty_string[] = " "; |
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 | ||
52 | static char * __init dmi_string(const struct dmi_header *dm, u8 s) | |
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); | |
65 | else | |
66 | printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len); | |
67 | ||
c3c7120d | 68 | return str; |
1da177e4 LT |
69 | } |
70 | ||
71 | /* | |
72 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
73 | * pointing to completely the wrong place for example | |
74 | */ | |
7fce084a | 75 | static void dmi_table(u8 *buf, int len, int num, |
e7a19c56 JD |
76 | void (*decode)(const struct dmi_header *, void *), |
77 | void *private_data) | |
1da177e4 | 78 | { |
7fce084a | 79 | u8 *data = buf; |
1249c513 | 80 | int i = 0; |
4f705ae3 | 81 | |
1da177e4 | 82 | /* |
4f705ae3 BH |
83 | * Stop when we see all the items the table claimed to have |
84 | * OR we run off the end of the table (also happens) | |
85 | */ | |
1249c513 | 86 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
1855256c JG |
87 | const struct dmi_header *dm = (const struct dmi_header *)data; |
88 | ||
1da177e4 | 89 | /* |
8638545c AC |
90 | * We want to know the total length (formatted area and |
91 | * strings) before decoding to make sure we won't run off the | |
92 | * table in dmi_decode or dmi_string | |
1da177e4 | 93 | */ |
1249c513 AP |
94 | data += dm->length; |
95 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 96 | data++; |
1249c513 | 97 | if (data - buf < len - 1) |
e7a19c56 | 98 | decode(dm, private_data); |
1249c513 | 99 | data += 2; |
1da177e4 LT |
100 | i++; |
101 | } | |
7fce084a JD |
102 | } |
103 | ||
104 | static u32 dmi_base; | |
105 | static u16 dmi_len; | |
106 | static u16 dmi_num; | |
107 | ||
e7a19c56 JD |
108 | static int __init dmi_walk_early(void (*decode)(const struct dmi_header *, |
109 | void *)) | |
7fce084a JD |
110 | { |
111 | u8 *buf; | |
112 | ||
113 | buf = dmi_ioremap(dmi_base, dmi_len); | |
114 | if (buf == NULL) | |
115 | return -1; | |
116 | ||
e7a19c56 | 117 | dmi_table(buf, dmi_len, dmi_num, decode, NULL); |
7fce084a | 118 | |
d114a333 TL |
119 | add_device_randomness(buf, dmi_len); |
120 | ||
7fce084a | 121 | dmi_iounmap(buf, dmi_len); |
1da177e4 LT |
122 | return 0; |
123 | } | |
124 | ||
9f9c9cbb | 125 | static int __init dmi_checksum(const u8 *buf, u8 len) |
1da177e4 | 126 | { |
1249c513 | 127 | u8 sum = 0; |
1da177e4 | 128 | int a; |
4f705ae3 | 129 | |
9f9c9cbb | 130 | for (a = 0; a < len; a++) |
1249c513 AP |
131 | sum += buf[a]; |
132 | ||
133 | return sum == 0; | |
1da177e4 LT |
134 | } |
135 | ||
1da177e4 | 136 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 137 | static LIST_HEAD(dmi_devices); |
4f5c791a | 138 | int dmi_available; |
1da177e4 LT |
139 | |
140 | /* | |
141 | * Save a DMI string | |
142 | */ | |
1855256c | 143 | static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string) |
1da177e4 | 144 | { |
1855256c JG |
145 | const char *d = (const char*) dm; |
146 | char *p; | |
1249c513 | 147 | |
1da177e4 LT |
148 | if (dmi_ident[slot]) |
149 | return; | |
1249c513 | 150 | |
c3c7120d AP |
151 | p = dmi_string(dm, d[string]); |
152 | if (p == NULL) | |
153 | return; | |
154 | ||
155 | dmi_ident[slot] = p; | |
1da177e4 LT |
156 | } |
157 | ||
1855256c | 158 | static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 159 | { |
1855256c | 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 LP |
190 | |
191 | dmi_ident[slot] = s; | |
192 | } | |
193 | ||
1855256c | 194 | static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index) |
4f5c791a | 195 | { |
1855256c | 196 | const u8 *d = (u8*) dm + index; |
4f5c791a LP |
197 | char *s; |
198 | ||
199 | if (dmi_ident[slot]) | |
200 | return; | |
201 | ||
202 | s = dmi_alloc(4); | |
203 | if (!s) | |
204 | return; | |
205 | ||
206 | sprintf(s, "%u", *d & 0x7F); | |
207 | dmi_ident[slot] = s; | |
208 | } | |
209 | ||
f3069ae9 JD |
210 | static void __init dmi_save_one_device(int type, const char *name) |
211 | { | |
212 | struct dmi_device *dev; | |
213 | ||
214 | /* No duplicate device */ | |
215 | if (dmi_find_device(type, name, NULL)) | |
216 | return; | |
217 | ||
218 | dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1); | |
219 | if (!dev) { | |
220 | printk(KERN_ERR "dmi_save_one_device: out of memory.\n"); | |
221 | return; | |
222 | } | |
223 | ||
224 | dev->type = type; | |
225 | strcpy((char *)(dev + 1), name); | |
226 | dev->name = (char *)(dev + 1); | |
227 | dev->device_data = NULL; | |
228 | list_add(&dev->list, &dmi_devices); | |
229 | } | |
230 | ||
1855256c | 231 | static void __init dmi_save_devices(const struct dmi_header *dm) |
ebad6a42 AP |
232 | { |
233 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
ebad6a42 AP |
234 | |
235 | for (i = 0; i < count; i++) { | |
1855256c | 236 | const char *d = (char *)(dm + 1) + (i * 2); |
ebad6a42 AP |
237 | |
238 | /* Skip disabled device */ | |
239 | if ((*d & 0x80) == 0) | |
240 | continue; | |
241 | ||
f3069ae9 | 242 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1))); |
2e0c1f6c SM |
243 | } |
244 | } | |
245 | ||
1855256c | 246 | static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm) |
2e0c1f6c SM |
247 | { |
248 | int i, count = *(u8 *)(dm + 1); | |
249 | struct dmi_device *dev; | |
250 | ||
251 | for (i = 1; i <= count; i++) { | |
79da4721 PW |
252 | char *devname = dmi_string(dm, i); |
253 | ||
43fe105a | 254 | if (devname == dmi_empty_string) |
79da4721 | 255 | continue; |
79da4721 | 256 | |
2e0c1f6c SM |
257 | dev = dmi_alloc(sizeof(*dev)); |
258 | if (!dev) { | |
259 | printk(KERN_ERR | |
260 | "dmi_save_oem_strings_devices: out of memory.\n"); | |
261 | break; | |
262 | } | |
263 | ||
264 | dev->type = DMI_DEV_TYPE_OEM_STRING; | |
79da4721 | 265 | dev->name = devname; |
2e0c1f6c | 266 | dev->device_data = NULL; |
ebad6a42 AP |
267 | |
268 | list_add(&dev->list, &dmi_devices); | |
269 | } | |
270 | } | |
271 | ||
1855256c | 272 | static void __init dmi_save_ipmi_device(const struct dmi_header *dm) |
ebad6a42 AP |
273 | { |
274 | struct dmi_device *dev; | |
275 | void * data; | |
276 | ||
e9928674 | 277 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
278 | if (data == NULL) { |
279 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
280 | return; | |
281 | } | |
282 | ||
283 | memcpy(data, dm, dm->length); | |
284 | ||
e9928674 | 285 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
286 | if (!dev) { |
287 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
288 | return; | |
289 | } | |
290 | ||
291 | dev->type = DMI_DEV_TYPE_IPMI; | |
292 | dev->name = "IPMI controller"; | |
293 | dev->device_data = data; | |
294 | ||
abd24df8 | 295 | list_add_tail(&dev->list, &dmi_devices); |
ebad6a42 AP |
296 | } |
297 | ||
911e1c9b N |
298 | static void __init dmi_save_dev_onboard(int instance, int segment, int bus, |
299 | int devfn, const char *name) | |
300 | { | |
301 | struct dmi_dev_onboard *onboard_dev; | |
302 | ||
303 | onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1); | |
304 | if (!onboard_dev) { | |
305 | printk(KERN_ERR "dmi_save_dev_onboard: out of memory.\n"); | |
306 | return; | |
307 | } | |
308 | onboard_dev->instance = instance; | |
309 | onboard_dev->segment = segment; | |
310 | onboard_dev->bus = bus; | |
311 | onboard_dev->devfn = devfn; | |
312 | ||
313 | strcpy((char *)&onboard_dev[1], name); | |
314 | onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD; | |
315 | onboard_dev->dev.name = (char *)&onboard_dev[1]; | |
316 | onboard_dev->dev.device_data = onboard_dev; | |
317 | ||
318 | list_add(&onboard_dev->dev.list, &dmi_devices); | |
319 | } | |
320 | ||
b4bd7d59 WVS |
321 | static void __init dmi_save_extended_devices(const struct dmi_header *dm) |
322 | { | |
323 | const u8 *d = (u8*) dm + 5; | |
b4bd7d59 WVS |
324 | |
325 | /* Skip disabled device */ | |
326 | if ((*d & 0x80) == 0) | |
327 | return; | |
328 | ||
911e1c9b N |
329 | dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5), |
330 | dmi_string_nosave(dm, *(d-1))); | |
f3069ae9 | 331 | dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1))); |
b4bd7d59 WVS |
332 | } |
333 | ||
1da177e4 LT |
334 | /* |
335 | * Process a DMI table entry. Right now all we care about are the BIOS | |
336 | * and machine entries. For 2.5 we should pull the smbus controller info | |
337 | * out of here. | |
338 | */ | |
e7a19c56 | 339 | static void __init dmi_decode(const struct dmi_header *dm, void *dummy) |
1da177e4 | 340 | { |
1249c513 | 341 | switch(dm->type) { |
ebad6a42 | 342 | case 0: /* BIOS Information */ |
1249c513 | 343 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 344 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
345 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
346 | break; | |
ebad6a42 | 347 | case 1: /* System Information */ |
1249c513 | 348 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 349 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 350 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 | 351 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
4f5c791a | 352 | dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8); |
1249c513 | 353 | break; |
ebad6a42 | 354 | case 2: /* Base Board Information */ |
1249c513 | 355 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 356 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 | 357 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
4f5c791a LP |
358 | dmi_save_ident(dm, DMI_BOARD_SERIAL, 7); |
359 | dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8); | |
360 | break; | |
361 | case 3: /* Chassis Information */ | |
362 | dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4); | |
363 | dmi_save_type(dm, DMI_CHASSIS_TYPE, 5); | |
364 | dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6); | |
365 | dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7); | |
366 | dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8); | |
1249c513 | 367 | break; |
ebad6a42 AP |
368 | case 10: /* Onboard Devices Information */ |
369 | dmi_save_devices(dm); | |
370 | break; | |
2e0c1f6c SM |
371 | case 11: /* OEM Strings */ |
372 | dmi_save_oem_strings_devices(dm); | |
373 | break; | |
ebad6a42 AP |
374 | case 38: /* IPMI Device Information */ |
375 | dmi_save_ipmi_device(dm); | |
b4bd7d59 WVS |
376 | break; |
377 | case 41: /* Onboard Devices Extended Information */ | |
378 | dmi_save_extended_devices(dm); | |
1da177e4 LT |
379 | } |
380 | } | |
381 | ||
c90fe6bc | 382 | static int __init print_filtered(char *buf, size_t len, const char *info) |
8881cdce | 383 | { |
c90fe6bc | 384 | int c = 0; |
8881cdce BH |
385 | const char *p; |
386 | ||
387 | if (!info) | |
c90fe6bc | 388 | return c; |
8881cdce BH |
389 | |
390 | for (p = info; *p; p++) | |
391 | if (isprint(*p)) | |
c90fe6bc | 392 | c += scnprintf(buf + c, len - c, "%c", *p); |
8881cdce | 393 | else |
c90fe6bc TH |
394 | c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff); |
395 | return c; | |
8881cdce BH |
396 | } |
397 | ||
c90fe6bc | 398 | static void __init dmi_format_ids(char *buf, size_t len) |
8881cdce | 399 | { |
c90fe6bc | 400 | int c = 0; |
84e383b3 NC |
401 | const char *board; /* Board Name is optional */ |
402 | ||
c90fe6bc TH |
403 | c += print_filtered(buf + c, len - c, |
404 | dmi_get_system_info(DMI_SYS_VENDOR)); | |
405 | c += scnprintf(buf + c, len - c, " "); | |
406 | c += print_filtered(buf + c, len - c, | |
407 | dmi_get_system_info(DMI_PRODUCT_NAME)); | |
408 | ||
84e383b3 NC |
409 | board = dmi_get_system_info(DMI_BOARD_NAME); |
410 | if (board) { | |
c90fe6bc TH |
411 | c += scnprintf(buf + c, len - c, "/"); |
412 | c += print_filtered(buf + c, len - c, board); | |
84e383b3 | 413 | } |
c90fe6bc TH |
414 | c += scnprintf(buf + c, len - c, ", BIOS "); |
415 | c += print_filtered(buf + c, len - c, | |
416 | dmi_get_system_info(DMI_BIOS_VERSION)); | |
417 | c += scnprintf(buf + c, len - c, " "); | |
418 | c += print_filtered(buf + c, len - c, | |
419 | dmi_get_system_info(DMI_BIOS_DATE)); | |
8881cdce BH |
420 | } |
421 | ||
d39de28c BH |
422 | /* |
423 | * Check for DMI/SMBIOS headers in the system firmware image. Any | |
424 | * SMBIOS header must start 16 bytes before the DMI header, so take a | |
425 | * 32 byte buffer and check for DMI at offset 16 and SMBIOS at offset | |
426 | * 0. If the DMI header is present, set dmi_ver accordingly (SMBIOS | |
427 | * takes precedence) and return 0. Otherwise return 1. | |
428 | */ | |
79bae42d | 429 | static int __init dmi_present(const u8 *buf) |
1da177e4 | 430 | { |
79bae42d | 431 | int smbios_ver; |
1855256c | 432 | |
79bae42d BH |
433 | if (memcmp(buf, "_SM_", 4) == 0 && |
434 | buf[5] < 32 && dmi_checksum(buf, buf[5])) { | |
435 | smbios_ver = (buf[6] << 8) + buf[7]; | |
436 | ||
437 | /* Some BIOS report weird SMBIOS version, fix that up */ | |
438 | switch (smbios_ver) { | |
439 | case 0x021F: | |
440 | case 0x0221: | |
441 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", | |
442 | smbios_ver & 0xFF, 3); | |
443 | smbios_ver = 0x0203; | |
444 | break; | |
445 | case 0x0233: | |
446 | pr_debug("SMBIOS version fixup(2.%d->2.%d)\n", 51, 6); | |
447 | smbios_ver = 0x0206; | |
448 | break; | |
449 | } | |
450 | } else { | |
451 | smbios_ver = 0; | |
452 | } | |
453 | ||
454 | buf += 16; | |
455 | ||
456 | if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) { | |
7fce084a JD |
457 | dmi_num = (buf[13] << 8) | buf[12]; |
458 | dmi_len = (buf[7] << 8) | buf[6]; | |
459 | dmi_base = (buf[11] << 24) | (buf[10] << 16) | | |
3ed3bce8 | 460 | (buf[9] << 8) | buf[8]; |
61e032fa | 461 | |
8881cdce | 462 | if (dmi_walk_early(dmi_decode) == 0) { |
79bae42d BH |
463 | if (smbios_ver) { |
464 | dmi_ver = smbios_ver; | |
9f9c9cbb ZD |
465 | pr_info("SMBIOS %d.%d present.\n", |
466 | dmi_ver >> 8, dmi_ver & 0xFF); | |
79bae42d | 467 | } else { |
9f9c9cbb ZD |
468 | dmi_ver = (buf[14] & 0xF0) << 4 | |
469 | (buf[14] & 0x0F); | |
470 | pr_info("Legacy DMI %d.%d present.\n", | |
471 | dmi_ver >> 8, dmi_ver & 0xFF); | |
472 | } | |
c90fe6bc TH |
473 | dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string)); |
474 | printk(KERN_DEBUG "DMI: %s\n", dmi_ids_string); | |
3ed3bce8 | 475 | return 0; |
8881cdce | 476 | } |
3ed3bce8 | 477 | } |
61e032fa | 478 | |
a40e7cf8 | 479 | return 1; |
9f9c9cbb ZD |
480 | } |
481 | ||
3ed3bce8 MD |
482 | void __init dmi_scan_machine(void) |
483 | { | |
484 | char __iomem *p, *q; | |
79bae42d | 485 | char buf[32]; |
3ed3bce8 | 486 | |
83e68189 | 487 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 488 | if (efi.smbios == EFI_INVALID_TABLE_ADDR) |
9a22b6e7 | 489 | goto error; |
3ed3bce8 | 490 | |
4f5c791a LP |
491 | /* This is called as a core_initcall() because it isn't |
492 | * needed during early boot. This also means we can | |
493 | * iounmap the space when we're done with it. | |
494 | */ | |
b2c99e3c | 495 | p = dmi_ioremap(efi.smbios, 32); |
3ed3bce8 | 496 | if (p == NULL) |
9a22b6e7 | 497 | goto error; |
79bae42d | 498 | memcpy_fromio(buf, p, 32); |
23dd842c | 499 | dmi_iounmap(p, 32); |
79bae42d BH |
500 | |
501 | if (!dmi_present(buf)) { | |
4f5c791a | 502 | dmi_available = 1; |
9a22b6e7 | 503 | goto out; |
4f5c791a | 504 | } |
3ed3bce8 MD |
505 | } |
506 | else { | |
507 | /* | |
508 | * no iounmap() for that ioremap(); it would be a no-op, but | |
509 | * it's so early in setup that sucker gets confused into doing | |
510 | * what it shouldn't if we actually call it. | |
511 | */ | |
512 | p = dmi_ioremap(0xF0000, 0x10000); | |
513 | if (p == NULL) | |
9a22b6e7 | 514 | goto error; |
3ed3bce8 | 515 | |
d39de28c BH |
516 | /* |
517 | * Iterate over all possible DMI header addresses q. | |
518 | * Maintain the 32 bytes around q in buf. On the | |
519 | * first iteration, substitute zero for the | |
520 | * out-of-range bytes so there is no chance of falsely | |
521 | * detecting an SMBIOS header. | |
522 | */ | |
79bae42d | 523 | memset(buf, 0, 16); |
3ed3bce8 | 524 | for (q = p; q < p + 0x10000; q += 16) { |
79bae42d BH |
525 | memcpy_fromio(buf + 16, q, 16); |
526 | if (!dmi_present(buf)) { | |
4f5c791a | 527 | dmi_available = 1; |
0d64484f | 528 | dmi_iounmap(p, 0x10000); |
9a22b6e7 | 529 | goto out; |
4f5c791a | 530 | } |
79bae42d | 531 | memcpy(buf, buf + 16, 16); |
61e032fa | 532 | } |
3212bff3 | 533 | dmi_iounmap(p, 0x10000); |
61e032fa | 534 | } |
9a22b6e7 IM |
535 | error: |
536 | printk(KERN_INFO "DMI not present or invalid.\n"); | |
537 | out: | |
538 | dmi_initialized = 1; | |
1da177e4 LT |
539 | } |
540 | ||
98e5e1bf TH |
541 | /** |
542 | * dmi_set_dump_stack_arch_desc - set arch description for dump_stack() | |
543 | * | |
544 | * Invoke dump_stack_set_arch_desc() with DMI system information so that | |
545 | * DMI identifiers are printed out on task dumps. Arch boot code should | |
546 | * call this function after dmi_scan_machine() if it wants to print out DMI | |
547 | * identifiers on task dumps. | |
548 | */ | |
549 | void __init dmi_set_dump_stack_arch_desc(void) | |
550 | { | |
551 | dump_stack_set_arch_desc("%s", dmi_ids_string); | |
552 | } | |
553 | ||
d7b1956f RW |
554 | /** |
555 | * dmi_matches - check if dmi_system_id structure matches system DMI data | |
556 | * @dmi: pointer to the dmi_system_id structure to check | |
557 | */ | |
558 | static bool dmi_matches(const struct dmi_system_id *dmi) | |
559 | { | |
560 | int i; | |
561 | ||
562 | WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n"); | |
563 | ||
564 | for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) { | |
565 | int s = dmi->matches[i].slot; | |
566 | if (s == DMI_NONE) | |
75757507 | 567 | break; |
5017b285 JN |
568 | if (dmi_ident[s]) { |
569 | if (!dmi->matches[i].exact_match && | |
570 | strstr(dmi_ident[s], dmi->matches[i].substr)) | |
571 | continue; | |
572 | else if (dmi->matches[i].exact_match && | |
573 | !strcmp(dmi_ident[s], dmi->matches[i].substr)) | |
574 | continue; | |
575 | } | |
576 | ||
d7b1956f RW |
577 | /* No match */ |
578 | return false; | |
579 | } | |
580 | return true; | |
581 | } | |
582 | ||
75757507 DT |
583 | /** |
584 | * dmi_is_end_of_table - check for end-of-table marker | |
585 | * @dmi: pointer to the dmi_system_id structure to check | |
586 | */ | |
587 | static bool dmi_is_end_of_table(const struct dmi_system_id *dmi) | |
588 | { | |
589 | return dmi->matches[0].slot == DMI_NONE; | |
590 | } | |
591 | ||
1da177e4 LT |
592 | /** |
593 | * dmi_check_system - check system DMI data | |
594 | * @list: array of dmi_system_id structures to match against | |
b0ef371e RD |
595 | * All non-null elements of the list must match |
596 | * their slot's (field index's) data (i.e., each | |
597 | * list string must be a substring of the specified | |
598 | * DMI slot's string data) to be considered a | |
599 | * successful match. | |
1da177e4 LT |
600 | * |
601 | * Walk the blacklist table running matching functions until someone | |
602 | * returns non zero or we hit the end. Callback function is called for | |
b0ef371e | 603 | * each successful match. Returns the number of matches. |
1da177e4 | 604 | */ |
1855256c | 605 | int dmi_check_system(const struct dmi_system_id *list) |
1da177e4 | 606 | { |
d7b1956f RW |
607 | int count = 0; |
608 | const struct dmi_system_id *d; | |
609 | ||
75757507 | 610 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
611 | if (dmi_matches(d)) { |
612 | count++; | |
613 | if (d->callback && d->callback(d)) | |
614 | break; | |
1da177e4 | 615 | } |
1da177e4 LT |
616 | |
617 | return count; | |
618 | } | |
1da177e4 LT |
619 | EXPORT_SYMBOL(dmi_check_system); |
620 | ||
d7b1956f RW |
621 | /** |
622 | * dmi_first_match - find dmi_system_id structure matching system DMI data | |
623 | * @list: array of dmi_system_id structures to match against | |
624 | * All non-null elements of the list must match | |
625 | * their slot's (field index's) data (i.e., each | |
626 | * list string must be a substring of the specified | |
627 | * DMI slot's string data) to be considered a | |
628 | * successful match. | |
629 | * | |
630 | * Walk the blacklist table until the first match is found. Return the | |
631 | * pointer to the matching entry or NULL if there's no match. | |
632 | */ | |
633 | const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list) | |
634 | { | |
635 | const struct dmi_system_id *d; | |
636 | ||
75757507 | 637 | for (d = list; !dmi_is_end_of_table(d); d++) |
d7b1956f RW |
638 | if (dmi_matches(d)) |
639 | return d; | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | EXPORT_SYMBOL(dmi_first_match); | |
644 | ||
1da177e4 LT |
645 | /** |
646 | * dmi_get_system_info - return DMI data value | |
b0ef371e | 647 | * @field: data index (see enum dmi_field) |
1da177e4 LT |
648 | * |
649 | * Returns one DMI data value, can be used to perform | |
650 | * complex DMI data checks. | |
651 | */ | |
1855256c | 652 | const char *dmi_get_system_info(int field) |
1da177e4 LT |
653 | { |
654 | return dmi_ident[field]; | |
655 | } | |
e70c9d5e | 656 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 | 657 | |
fd8cd7e1 | 658 | /** |
c2bacfc4 RD |
659 | * dmi_name_in_serial - Check if string is in the DMI product serial information |
660 | * @str: string to check for | |
fd8cd7e1 AK |
661 | */ |
662 | int dmi_name_in_serial(const char *str) | |
663 | { | |
664 | int f = DMI_PRODUCT_SERIAL; | |
665 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
666 | return 1; | |
667 | return 0; | |
668 | } | |
a1bae672 AK |
669 | |
670 | /** | |
66e13e66 | 671 | * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name |
a1bae672 AK |
672 | * @str: Case sensitive Name |
673 | */ | |
1855256c | 674 | int dmi_name_in_vendors(const char *str) |
a1bae672 | 675 | { |
66e13e66 | 676 | static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE }; |
a1bae672 AK |
677 | int i; |
678 | for (i = 0; fields[i] != DMI_NONE; i++) { | |
679 | int f = fields[i]; | |
680 | if (dmi_ident[f] && strstr(dmi_ident[f], str)) | |
681 | return 1; | |
682 | } | |
683 | return 0; | |
684 | } | |
685 | EXPORT_SYMBOL(dmi_name_in_vendors); | |
686 | ||
ebad6a42 AP |
687 | /** |
688 | * dmi_find_device - find onboard device by type/name | |
689 | * @type: device type or %DMI_DEV_TYPE_ANY to match all device types | |
b0ef371e | 690 | * @name: device name string or %NULL to match all |
ebad6a42 AP |
691 | * @from: previous device found in search, or %NULL for new search. |
692 | * | |
693 | * Iterates through the list of known onboard devices. If a device is | |
694 | * found with a matching @vendor and @device, a pointer to its device | |
695 | * structure is returned. Otherwise, %NULL is returned. | |
b0ef371e | 696 | * A new search is initiated by passing %NULL as the @from argument. |
ebad6a42 AP |
697 | * If @from is not %NULL, searches continue from next device. |
698 | */ | |
1855256c JG |
699 | const struct dmi_device * dmi_find_device(int type, const char *name, |
700 | const struct dmi_device *from) | |
ebad6a42 | 701 | { |
1855256c JG |
702 | const struct list_head *head = from ? &from->list : &dmi_devices; |
703 | struct list_head *d; | |
ebad6a42 AP |
704 | |
705 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
1855256c JG |
706 | const struct dmi_device *dev = |
707 | list_entry(d, struct dmi_device, list); | |
ebad6a42 AP |
708 | |
709 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
710 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
711 | return dev; | |
712 | } | |
713 | ||
714 | return NULL; | |
715 | } | |
716 | EXPORT_SYMBOL(dmi_find_device); | |
f083a329 AK |
717 | |
718 | /** | |
3e5cd1f2 TH |
719 | * dmi_get_date - parse a DMI date |
720 | * @field: data index (see enum dmi_field) | |
721 | * @yearp: optional out parameter for the year | |
722 | * @monthp: optional out parameter for the month | |
723 | * @dayp: optional out parameter for the day | |
f083a329 | 724 | * |
3e5cd1f2 TH |
725 | * The date field is assumed to be in the form resembling |
726 | * [mm[/dd]]/yy[yy] and the result is stored in the out | |
727 | * parameters any or all of which can be omitted. | |
728 | * | |
729 | * If the field doesn't exist, all out parameters are set to zero | |
730 | * and false is returned. Otherwise, true is returned with any | |
731 | * invalid part of date set to zero. | |
732 | * | |
733 | * On return, year, month and day are guaranteed to be in the | |
734 | * range of [0,9999], [0,12] and [0,31] respectively. | |
f083a329 | 735 | */ |
3e5cd1f2 | 736 | bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp) |
f083a329 | 737 | { |
3e5cd1f2 TH |
738 | int year = 0, month = 0, day = 0; |
739 | bool exists; | |
740 | const char *s, *y; | |
02c24fa8 | 741 | char *e; |
f083a329 | 742 | |
3e5cd1f2 TH |
743 | s = dmi_get_system_info(field); |
744 | exists = s; | |
745 | if (!exists) | |
746 | goto out; | |
f083a329 | 747 | |
3e5cd1f2 TH |
748 | /* |
749 | * Determine year first. We assume the date string resembles | |
750 | * mm/dd/yy[yy] but the original code extracted only the year | |
751 | * from the end. Keep the behavior in the spirit of no | |
752 | * surprises. | |
753 | */ | |
754 | y = strrchr(s, '/'); | |
755 | if (!y) | |
756 | goto out; | |
757 | ||
758 | y++; | |
759 | year = simple_strtoul(y, &e, 10); | |
760 | if (y != e && year < 100) { /* 2-digit year */ | |
f083a329 AK |
761 | year += 1900; |
762 | if (year < 1996) /* no dates < spec 1.0 */ | |
763 | year += 100; | |
764 | } | |
3e5cd1f2 TH |
765 | if (year > 9999) /* year should fit in %04d */ |
766 | year = 0; | |
767 | ||
768 | /* parse the mm and dd */ | |
769 | month = simple_strtoul(s, &e, 10); | |
770 | if (s == e || *e != '/' || !month || month > 12) { | |
771 | month = 0; | |
772 | goto out; | |
773 | } | |
f083a329 | 774 | |
3e5cd1f2 TH |
775 | s = e + 1; |
776 | day = simple_strtoul(s, &e, 10); | |
777 | if (s == y || s == e || *e != '/' || day > 31) | |
778 | day = 0; | |
779 | out: | |
780 | if (yearp) | |
781 | *yearp = year; | |
782 | if (monthp) | |
783 | *monthp = month; | |
784 | if (dayp) | |
785 | *dayp = day; | |
786 | return exists; | |
f083a329 | 787 | } |
3e5cd1f2 | 788 | EXPORT_SYMBOL(dmi_get_date); |
7fce084a JD |
789 | |
790 | /** | |
791 | * dmi_walk - Walk the DMI table and get called back for every record | |
792 | * @decode: Callback function | |
e7a19c56 | 793 | * @private_data: Private data to be passed to the callback function |
7fce084a JD |
794 | * |
795 | * Returns -1 when the DMI table can't be reached, 0 on success. | |
796 | */ | |
e7a19c56 JD |
797 | int dmi_walk(void (*decode)(const struct dmi_header *, void *), |
798 | void *private_data) | |
7fce084a JD |
799 | { |
800 | u8 *buf; | |
801 | ||
802 | if (!dmi_available) | |
803 | return -1; | |
804 | ||
805 | buf = ioremap(dmi_base, dmi_len); | |
806 | if (buf == NULL) | |
807 | return -1; | |
808 | ||
e7a19c56 | 809 | dmi_table(buf, dmi_len, dmi_num, decode, private_data); |
7fce084a JD |
810 | |
811 | iounmap(buf); | |
812 | return 0; | |
813 | } | |
814 | EXPORT_SYMBOL_GPL(dmi_walk); | |
d61c72e5 JS |
815 | |
816 | /** | |
817 | * dmi_match - compare a string to the dmi field (if exists) | |
c2bacfc4 RD |
818 | * @f: DMI field identifier |
819 | * @str: string to compare the DMI field to | |
d61c72e5 JS |
820 | * |
821 | * Returns true if the requested field equals to the str (including NULL). | |
822 | */ | |
823 | bool dmi_match(enum dmi_field f, const char *str) | |
824 | { | |
825 | const char *info = dmi_get_system_info(f); | |
826 | ||
827 | if (info == NULL || str == NULL) | |
828 | return info == str; | |
829 | ||
830 | return !strcmp(info, str); | |
831 | } | |
832 | EXPORT_SYMBOL_GPL(dmi_match); |