1 #include <linux/types.h>
2 #include <linux/string.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
7 #include <linux/bootmem.h>
8 #include <linux/slab.h>
11 static char dmi_empty_string[] = " ";
13 static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
15 const u8 *bp = ((u8 *) dm) + dm->length;
19 while (s > 0 && *bp) {
25 size_t len = strlen(bp)+1;
26 size_t cmp_len = len > 8 ? 8 : len;
28 if (!memcmp(bp, dmi_empty_string, cmp_len))
29 return dmi_empty_string;
37 static char * __init dmi_string(const struct dmi_header *dm, u8 s)
39 const char *bp = dmi_string_nosave(dm, s);
43 if (bp == dmi_empty_string)
44 return dmi_empty_string;
51 printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len);
57 * We have to be cautious here. We have seen BIOSes with DMI pointers
58 * pointing to completely the wrong place for example
60 static void dmi_table(u8 *buf, int len, int num,
61 void (*decode)(const struct dmi_header *))
67 * Stop when we see all the items the table claimed to have
68 * OR we run off the end of the table (also happens)
70 while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
71 const struct dmi_header *dm = (const struct dmi_header *)data;
74 * We want to know the total length (formated area and strings)
75 * before decoding to make sure we won't run off the table in
76 * dmi_decode or dmi_string
79 while ((data - buf < len - 1) && (data[0] || data[1]))
81 if (data - buf < len - 1)
92 static int __init dmi_walk_early(void (*decode)(const struct dmi_header *))
96 buf = dmi_ioremap(dmi_base, dmi_len);
100 dmi_table(buf, dmi_len, dmi_num, decode);
102 dmi_iounmap(buf, dmi_len);
106 static int __init dmi_checksum(const u8 *buf)
111 for (a = 0; a < 15; a++)
117 static char *dmi_ident[DMI_STRING_MAX];
118 static LIST_HEAD(dmi_devices);
124 static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string)
126 const char *d = (const char*) dm;
132 p = dmi_string(dm, d[string]);
139 static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index)
141 const u8 *d = (u8*) dm + index;
143 int is_ff = 1, is_00 = 1, i;
148 for (i = 0; i < 16 && (is_ff || is_00); i++) {
149 if(d[i] != 0x00) is_ff = 0;
150 if(d[i] != 0xFF) is_00 = 0;
156 s = dmi_alloc(16*2+4+1);
161 "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
162 d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7],
163 d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]);
168 static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index)
170 const u8 *d = (u8*) dm + index;
180 sprintf(s, "%u", *d & 0x7F);
184 static void __init dmi_save_one_device(int type, const char *name)
186 struct dmi_device *dev;
188 /* No duplicate device */
189 if (dmi_find_device(type, name, NULL))
192 dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
194 printk(KERN_ERR "dmi_save_one_device: out of memory.\n");
199 strcpy((char *)(dev + 1), name);
200 dev->name = (char *)(dev + 1);
201 dev->device_data = NULL;
202 list_add(&dev->list, &dmi_devices);
205 static void __init dmi_save_devices(const struct dmi_header *dm)
207 int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
209 for (i = 0; i < count; i++) {
210 const char *d = (char *)(dm + 1) + (i * 2);
212 /* Skip disabled device */
213 if ((*d & 0x80) == 0)
216 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
220 static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
222 int i, count = *(u8 *)(dm + 1);
223 struct dmi_device *dev;
225 for (i = 1; i <= count; i++) {
226 char *devname = dmi_string(dm, i);
228 if (devname == dmi_empty_string)
231 dev = dmi_alloc(sizeof(*dev));
234 "dmi_save_oem_strings_devices: out of memory.\n");
238 dev->type = DMI_DEV_TYPE_OEM_STRING;
240 dev->device_data = NULL;
242 list_add(&dev->list, &dmi_devices);
246 static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
248 struct dmi_device *dev;
251 data = dmi_alloc(dm->length);
253 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
257 memcpy(data, dm, dm->length);
259 dev = dmi_alloc(sizeof(*dev));
261 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
265 dev->type = DMI_DEV_TYPE_IPMI;
266 dev->name = "IPMI controller";
267 dev->device_data = data;
269 list_add_tail(&dev->list, &dmi_devices);
272 static void __init dmi_save_extended_devices(const struct dmi_header *dm)
274 const u8 *d = (u8*) dm + 5;
276 /* Skip disabled device */
277 if ((*d & 0x80) == 0)
280 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
284 * Process a DMI table entry. Right now all we care about are the BIOS
285 * and machine entries. For 2.5 we should pull the smbus controller info
288 static void __init dmi_decode(const struct dmi_header *dm)
291 case 0: /* BIOS Information */
292 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
293 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
294 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
296 case 1: /* System Information */
297 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
298 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
299 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
300 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
301 dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
303 case 2: /* Base Board Information */
304 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
305 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
306 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
307 dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
308 dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
310 case 3: /* Chassis Information */
311 dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
312 dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
313 dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
314 dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
315 dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
317 case 10: /* Onboard Devices Information */
318 dmi_save_devices(dm);
320 case 11: /* OEM Strings */
321 dmi_save_oem_strings_devices(dm);
323 case 38: /* IPMI Device Information */
324 dmi_save_ipmi_device(dm);
326 case 41: /* Onboard Devices Extended Information */
327 dmi_save_extended_devices(dm);
331 static int __init dmi_present(const char __iomem *p)
335 memcpy_fromio(buf, p, 15);
336 if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
337 dmi_num = (buf[13] << 8) | buf[12];
338 dmi_len = (buf[7] << 8) | buf[6];
339 dmi_base = (buf[11] << 24) | (buf[10] << 16) |
340 (buf[9] << 8) | buf[8];
343 * DMI version 0.0 means that the real version is taken from
344 * the SMBIOS version, which we don't know at this point.
347 printk(KERN_INFO "DMI %d.%d present.\n",
348 buf[14] >> 4, buf[14] & 0xF);
350 printk(KERN_INFO "DMI present.\n");
351 if (dmi_walk_early(dmi_decode) == 0)
357 void __init dmi_scan_machine(void)
363 if (efi.smbios == EFI_INVALID_TABLE_ADDR)
366 /* This is called as a core_initcall() because it isn't
367 * needed during early boot. This also means we can
368 * iounmap the space when we're done with it.
370 p = dmi_ioremap(efi.smbios, 32);
374 rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
383 * no iounmap() for that ioremap(); it would be a no-op, but
384 * it's so early in setup that sucker gets confused into doing
385 * what it shouldn't if we actually call it.
387 p = dmi_ioremap(0xF0000, 0x10000);
391 for (q = p; q < p + 0x10000; q += 16) {
395 dmi_iounmap(p, 0x10000);
399 dmi_iounmap(p, 0x10000);
401 out: printk(KERN_INFO "DMI not present or invalid.\n");
405 * dmi_check_system - check system DMI data
406 * @list: array of dmi_system_id structures to match against
407 * All non-null elements of the list must match
408 * their slot's (field index's) data (i.e., each
409 * list string must be a substring of the specified
410 * DMI slot's string data) to be considered a
413 * Walk the blacklist table running matching functions until someone
414 * returns non zero or we hit the end. Callback function is called for
415 * each successful match. Returns the number of matches.
417 int dmi_check_system(const struct dmi_system_id *list)
420 const struct dmi_system_id *d = list;
423 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
424 int s = d->matches[i].slot;
427 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
433 if (d->callback && d->callback(d))
440 EXPORT_SYMBOL(dmi_check_system);
443 * dmi_get_system_info - return DMI data value
444 * @field: data index (see enum dmi_field)
446 * Returns one DMI data value, can be used to perform
447 * complex DMI data checks.
449 const char *dmi_get_system_info(int field)
451 return dmi_ident[field];
453 EXPORT_SYMBOL(dmi_get_system_info);
457 * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
458 * @str: Case sensitive Name
460 int dmi_name_in_vendors(const char *str)
462 static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
463 DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
464 DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE };
466 for (i = 0; fields[i] != DMI_NONE; i++) {
468 if (dmi_ident[f] && strstr(dmi_ident[f], str))
473 EXPORT_SYMBOL(dmi_name_in_vendors);
476 * dmi_find_device - find onboard device by type/name
477 * @type: device type or %DMI_DEV_TYPE_ANY to match all device types
478 * @name: device name string or %NULL to match all
479 * @from: previous device found in search, or %NULL for new search.
481 * Iterates through the list of known onboard devices. If a device is
482 * found with a matching @vendor and @device, a pointer to its device
483 * structure is returned. Otherwise, %NULL is returned.
484 * A new search is initiated by passing %NULL as the @from argument.
485 * If @from is not %NULL, searches continue from next device.
487 const struct dmi_device * dmi_find_device(int type, const char *name,
488 const struct dmi_device *from)
490 const struct list_head *head = from ? &from->list : &dmi_devices;
493 for(d = head->next; d != &dmi_devices; d = d->next) {
494 const struct dmi_device *dev =
495 list_entry(d, struct dmi_device, list);
497 if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
498 ((name == NULL) || (strcmp(dev->name, name) == 0)))
504 EXPORT_SYMBOL(dmi_find_device);
507 * dmi_get_year - Return year of a DMI date
508 * @field: data index (like dmi_get_system_info)
510 * Returns -1 when the field doesn't exist. 0 when it is broken.
512 int dmi_get_year(int field)
515 const char *s = dmi_get_system_info(field);
526 year = simple_strtoul(s, NULL, 0);
527 if (year && year < 100) { /* 2-digit year */
529 if (year < 1996) /* no dates < spec 1.0 */
537 * dmi_walk - Walk the DMI table and get called back for every record
538 * @decode: Callback function
540 * Returns -1 when the DMI table can't be reached, 0 on success.
542 int dmi_walk(void (*decode)(const struct dmi_header *))
549 buf = ioremap(dmi_base, dmi_len);
553 dmi_table(buf, dmi_len, dmi_num, decode);
558 EXPORT_SYMBOL_GPL(dmi_walk);