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