1
2#include <linux/types.h>
3#include <linux/string.h>
4#include <linux/init.h>
5#include <linux/module.h>
6#include <linux/ctype.h>
7#include <linux/dmi.h>
8#include <linux/efi.h>
9#include <linux/memblock.h>
10#include <linux/random.h>
11#include <asm/dmi.h>
12#include <asm/unaligned.h>
13
14#ifndef SMBIOS_ENTRY_POINT_SCAN_START
15#define SMBIOS_ENTRY_POINT_SCAN_START 0xF0000
16#endif
17
18struct kobject *dmi_kobj;
19EXPORT_SYMBOL_GPL(dmi_kobj);
20
21
22
23
24
25
26static const char dmi_empty_string[] = "";
27
28static u32 dmi_ver __initdata;
29static u32 dmi_len;
30static u16 dmi_num;
31static u8 smbios_entry_point[32];
32static int smbios_entry_point_size;
33
34
35static char dmi_ids_string[128] __initdata;
36
37static struct dmi_memdev_info {
38 const char *device;
39 const char *bank;
40 u64 size;
41 u16 handle;
42 u8 type;
43} *dmi_memdev;
44static int dmi_memdev_nr;
45
46static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
47{
48 const u8 *bp = ((u8 *) dm) + dm->length;
49 const u8 *nsp;
50
51 if (s) {
52 while (--s > 0 && *bp)
53 bp += strlen(bp) + 1;
54
55
56 nsp = bp;
57 while (*nsp == ' ')
58 nsp++;
59 if (*nsp != '\0')
60 return bp;
61 }
62
63 return dmi_empty_string;
64}
65
66static const char * __init dmi_string(const struct dmi_header *dm, u8 s)
67{
68 const char *bp = dmi_string_nosave(dm, s);
69 char *str;
70 size_t len;
71
72 if (bp == dmi_empty_string)
73 return dmi_empty_string;
74
75 len = strlen(bp) + 1;
76 str = dmi_alloc(len);
77 if (str != NULL)
78 strcpy(str, bp);
79
80 return str;
81}
82
83
84
85
86
87static void dmi_decode_table(u8 *buf,
88 void (*decode)(const struct dmi_header *, void *),
89 void *private_data)
90{
91 u8 *data = buf;
92 int i = 0;
93
94
95
96
97
98
99
100 while ((!dmi_num || i < dmi_num) &&
101 (data - buf + sizeof(struct dmi_header)) <= dmi_len) {
102 const struct dmi_header *dm = (const struct dmi_header *)data;
103
104
105
106
107
108
109 data += dm->length;
110 while ((data - buf < dmi_len - 1) && (data[0] || data[1]))
111 data++;
112 if (data - buf < dmi_len - 1)
113 decode(dm, private_data);
114
115 data += 2;
116 i++;
117
118
119
120
121
122
123
124
125
126 if (!dmi_num && dm->type == DMI_ENTRY_END_OF_TABLE)
127 break;
128 }
129
130
131 if (dmi_len > data - buf)
132 dmi_len = data - buf;
133}
134
135static phys_addr_t dmi_base;
136
137static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
138 void *))
139{
140 u8 *buf;
141 u32 orig_dmi_len = dmi_len;
142
143 buf = dmi_early_remap(dmi_base, orig_dmi_len);
144 if (buf == NULL)
145 return -ENOMEM;
146
147 dmi_decode_table(buf, decode, NULL);
148
149 add_device_randomness(buf, dmi_len);
150
151 dmi_early_unmap(buf, orig_dmi_len);
152 return 0;
153}
154
155static int __init dmi_checksum(const u8 *buf, u8 len)
156{
157 u8 sum = 0;
158 int a;
159
160 for (a = 0; a < len; a++)
161 sum += buf[a];
162
163 return sum == 0;
164}
165
166static const char *dmi_ident[DMI_STRING_MAX];
167static LIST_HEAD(dmi_devices);
168int dmi_available;
169EXPORT_SYMBOL_GPL(dmi_available);
170
171
172
173
174static void __init dmi_save_ident(const struct dmi_header *dm, int slot,
175 int string)
176{
177 const char *d = (const char *) dm;
178 const char *p;
179
180 if (dmi_ident[slot] || dm->length <= string)
181 return;
182
183 p = dmi_string(dm, d[string]);
184 if (p == NULL)
185 return;
186
187 dmi_ident[slot] = p;
188}
189
190static void __init dmi_save_release(const struct dmi_header *dm, int slot,
191 int index)
192{
193 const u8 *minor, *major;
194 char *s;
195
196
197 if (dmi_ident[slot] || dm->length < index)
198 return;
199
200 minor = (u8 *) dm + index;
201 major = (u8 *) dm + index - 1;
202
203
204
205
206 if (*major == 0xFF && *minor == 0xFF)
207 return;
208
209 s = dmi_alloc(8);
210 if (!s)
211 return;
212
213 sprintf(s, "%u.%u", *major, *minor);
214
215 dmi_ident[slot] = s;
216}
217
218static void __init dmi_save_uuid(const struct dmi_header *dm, int slot,
219 int index)
220{
221 const u8 *d;
222 char *s;
223 int is_ff = 1, is_00 = 1, i;
224
225 if (dmi_ident[slot] || dm->length < index + 16)
226 return;
227
228 d = (u8 *) dm + index;
229 for (i = 0; i < 16 && (is_ff || is_00); i++) {
230 if (d[i] != 0x00)
231 is_00 = 0;
232 if (d[i] != 0xFF)
233 is_ff = 0;
234 }
235
236 if (is_ff || is_00)
237 return;
238
239 s = dmi_alloc(16*2+4+1);
240 if (!s)
241 return;
242
243
244
245
246
247
248 if (dmi_ver >= 0x020600)
249 sprintf(s, "%pUl", d);
250 else
251 sprintf(s, "%pUb", d);
252
253 dmi_ident[slot] = s;
254}
255
256static void __init dmi_save_type(const struct dmi_header *dm, int slot,
257 int index)
258{
259 const u8 *d;
260 char *s;
261
262 if (dmi_ident[slot] || dm->length <= index)
263 return;
264
265 s = dmi_alloc(4);
266 if (!s)
267 return;
268
269 d = (u8 *) dm + index;
270 sprintf(s, "%u", *d & 0x7F);
271 dmi_ident[slot] = s;
272}
273
274static void __init dmi_save_one_device(int type, const char *name)
275{
276 struct dmi_device *dev;
277
278
279 if (dmi_find_device(type, name, NULL))
280 return;
281
282 dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
283 if (!dev)
284 return;
285
286 dev->type = type;
287 strcpy((char *)(dev + 1), name);
288 dev->name = (char *)(dev + 1);
289 dev->device_data = NULL;
290 list_add(&dev->list, &dmi_devices);
291}
292
293static void __init dmi_save_devices(const struct dmi_header *dm)
294{
295 int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
296
297 for (i = 0; i < count; i++) {
298 const char *d = (char *)(dm + 1) + (i * 2);
299
300
301 if ((*d & 0x80) == 0)
302 continue;
303
304 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
305 }
306}
307
308static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
309{
310 int i, count;
311 struct dmi_device *dev;
312
313 if (dm->length < 0x05)
314 return;
315
316 count = *(u8 *)(dm + 1);
317 for (i = 1; i <= count; i++) {
318 const char *devname = dmi_string(dm, i);
319
320 if (devname == dmi_empty_string)
321 continue;
322
323 dev = dmi_alloc(sizeof(*dev));
324 if (!dev)
325 break;
326
327 dev->type = DMI_DEV_TYPE_OEM_STRING;
328 dev->name = devname;
329 dev->device_data = NULL;
330
331 list_add(&dev->list, &dmi_devices);
332 }
333}
334
335static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
336{
337 struct dmi_device *dev;
338 void *data;
339
340 data = dmi_alloc(dm->length);
341 if (data == NULL)
342 return;
343
344 memcpy(data, dm, dm->length);
345
346 dev = dmi_alloc(sizeof(*dev));
347 if (!dev)
348 return;
349
350 dev->type = DMI_DEV_TYPE_IPMI;
351 dev->name = "IPMI controller";
352 dev->device_data = data;
353
354 list_add_tail(&dev->list, &dmi_devices);
355}
356
357static void __init dmi_save_dev_pciaddr(int instance, int segment, int bus,
358 int devfn, const char *name, int type)
359{
360 struct dmi_dev_onboard *dev;
361
362
363 if (type == DMI_DEV_TYPE_DEV_SLOT &&
364 segment == 0xFFFF && bus == 0xFF && devfn == 0xFF)
365 return;
366
367 dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
368 if (!dev)
369 return;
370
371 dev->instance = instance;
372 dev->segment = segment;
373 dev->bus = bus;
374 dev->devfn = devfn;
375
376 strcpy((char *)&dev[1], name);
377 dev->dev.type = type;
378 dev->dev.name = (char *)&dev[1];
379 dev->dev.device_data = dev;
380
381 list_add(&dev->dev.list, &dmi_devices);
382}
383
384static void __init dmi_save_extended_devices(const struct dmi_header *dm)
385{
386 const char *name;
387 const u8 *d = (u8 *)dm;
388
389 if (dm->length < 0x0B)
390 return;
391
392
393 if ((d[0x5] & 0x80) == 0)
394 return;
395
396 name = dmi_string_nosave(dm, d[0x4]);
397 dmi_save_dev_pciaddr(d[0x6], *(u16 *)(d + 0x7), d[0x9], d[0xA], name,
398 DMI_DEV_TYPE_DEV_ONBOARD);
399 dmi_save_one_device(d[0x5] & 0x7f, name);
400}
401
402static void __init dmi_save_system_slot(const struct dmi_header *dm)
403{
404 const u8 *d = (u8 *)dm;
405
406
407 if (dm->length < 0x11)
408 return;
409 dmi_save_dev_pciaddr(*(u16 *)(d + 0x9), *(u16 *)(d + 0xD), d[0xF],
410 d[0x10], dmi_string_nosave(dm, d[0x4]),
411 DMI_DEV_TYPE_DEV_SLOT);
412}
413
414static void __init count_mem_devices(const struct dmi_header *dm, void *v)
415{
416 if (dm->type != DMI_ENTRY_MEM_DEVICE)
417 return;
418 dmi_memdev_nr++;
419}
420
421static void __init save_mem_devices(const struct dmi_header *dm, void *v)
422{
423 const char *d = (const char *)dm;
424 static int nr;
425 u64 bytes;
426 u16 size;
427
428 if (dm->type != DMI_ENTRY_MEM_DEVICE || dm->length < 0x13)
429 return;
430 if (nr >= dmi_memdev_nr) {
431 pr_warn(FW_BUG "Too many DIMM entries in SMBIOS table\n");
432 return;
433 }
434 dmi_memdev[nr].handle = get_unaligned(&dm->handle);
435 dmi_memdev[nr].device = dmi_string(dm, d[0x10]);
436 dmi_memdev[nr].bank = dmi_string(dm, d[0x11]);
437 dmi_memdev[nr].type = d[0x12];
438
439 size = get_unaligned((u16 *)&d[0xC]);
440 if (size == 0)
441 bytes = 0;
442 else if (size == 0xffff)
443 bytes = ~0ull;
444 else if (size & 0x8000)
445 bytes = (u64)(size & 0x7fff) << 10;
446 else if (size != 0x7fff || dm->length < 0x20)
447 bytes = (u64)size << 20;
448 else
449 bytes = (u64)get_unaligned((u32 *)&d[0x1C]) << 20;
450
451 dmi_memdev[nr].size = bytes;
452 nr++;
453}
454
455static void __init dmi_memdev_walk(void)
456{
457 if (dmi_walk_early(count_mem_devices) == 0 && dmi_memdev_nr) {
458 dmi_memdev = dmi_alloc(sizeof(*dmi_memdev) * dmi_memdev_nr);
459 if (dmi_memdev)
460 dmi_walk_early(save_mem_devices);
461 }
462}
463
464
465
466
467
468
469static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
470{
471 switch (dm->type) {
472 case 0:
473 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
474 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
475 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
476 dmi_save_release(dm, DMI_BIOS_RELEASE, 21);
477 dmi_save_release(dm, DMI_EC_FIRMWARE_RELEASE, 23);
478 break;
479 case 1:
480 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
481 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
482 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
483 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
484 dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
485 dmi_save_ident(dm, DMI_PRODUCT_SKU, 25);
486 dmi_save_ident(dm, DMI_PRODUCT_FAMILY, 26);
487 break;
488 case 2:
489 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
490 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
491 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
492 dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
493 dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
494 break;
495 case 3:
496 dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
497 dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
498 dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
499 dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
500 dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
501 break;
502 case 9:
503 dmi_save_system_slot(dm);
504 break;
505 case 10:
506 dmi_save_devices(dm);
507 break;
508 case 11:
509 dmi_save_oem_strings_devices(dm);
510 break;
511 case 38:
512 dmi_save_ipmi_device(dm);
513 break;
514 case 41:
515 dmi_save_extended_devices(dm);
516 }
517}
518
519static int __init print_filtered(char *buf, size_t len, const char *info)
520{
521 int c = 0;
522 const char *p;
523
524 if (!info)
525 return c;
526
527 for (p = info; *p; p++)
528 if (isprint(*p))
529 c += scnprintf(buf + c, len - c, "%c", *p);
530 else
531 c += scnprintf(buf + c, len - c, "\\x%02x", *p & 0xff);
532 return c;
533}
534
535static void __init dmi_format_ids(char *buf, size_t len)
536{
537 int c = 0;
538 const char *board;
539
540 c += print_filtered(buf + c, len - c,
541 dmi_get_system_info(DMI_SYS_VENDOR));
542 c += scnprintf(buf + c, len - c, " ");
543 c += print_filtered(buf + c, len - c,
544 dmi_get_system_info(DMI_PRODUCT_NAME));
545
546 board = dmi_get_system_info(DMI_BOARD_NAME);
547 if (board) {
548 c += scnprintf(buf + c, len - c, "/");
549 c += print_filtered(buf + c, len - c, board);
550 }
551 c += scnprintf(buf + c, len - c, ", BIOS ");
552 c += print_filtered(buf + c, len - c,
553 dmi_get_system_info(DMI_BIOS_VERSION));
554 c += scnprintf(buf + c, len - c, " ");
555 c += print_filtered(buf + c, len - c,
556 dmi_get_system_info(DMI_BIOS_DATE));
557}
558
559
560
561
562
563
564
565
566static int __init dmi_present(const u8 *buf)
567{
568 u32 smbios_ver;
569
570 if (memcmp(buf, "_SM_", 4) == 0 &&
571 buf[5] < 32 && dmi_checksum(buf, buf[5])) {
572 smbios_ver = get_unaligned_be16(buf + 6);
573 smbios_entry_point_size = buf[5];
574 memcpy(smbios_entry_point, buf, smbios_entry_point_size);
575
576
577 switch (smbios_ver) {
578 case 0x021F:
579 case 0x0221:
580 pr_debug("SMBIOS version fixup (2.%d->2.%d)\n",
581 smbios_ver & 0xFF, 3);
582 smbios_ver = 0x0203;
583 break;
584 case 0x0233:
585 pr_debug("SMBIOS version fixup (2.%d->2.%d)\n", 51, 6);
586 smbios_ver = 0x0206;
587 break;
588 }
589 } else {
590 smbios_ver = 0;
591 }
592
593 buf += 16;
594
595 if (memcmp(buf, "_DMI_", 5) == 0 && dmi_checksum(buf, 15)) {
596 if (smbios_ver)
597 dmi_ver = smbios_ver;
598 else
599 dmi_ver = (buf[14] & 0xF0) << 4 | (buf[14] & 0x0F);
600 dmi_ver <<= 8;
601 dmi_num = get_unaligned_le16(buf + 12);
602 dmi_len = get_unaligned_le16(buf + 6);
603 dmi_base = get_unaligned_le32(buf + 8);
604
605 if (dmi_walk_early(dmi_decode) == 0) {
606 if (smbios_ver) {
607 pr_info("SMBIOS %d.%d present.\n",
608 dmi_ver >> 16, (dmi_ver >> 8) & 0xFF);
609 } else {
610 smbios_entry_point_size = 15;
611 memcpy(smbios_entry_point, buf,
612 smbios_entry_point_size);
613 pr_info("Legacy DMI %d.%d present.\n",
614 dmi_ver >> 16, (dmi_ver >> 8) & 0xFF);
615 }
616 dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
617 pr_info("DMI: %s\n", dmi_ids_string);
618 return 0;
619 }
620 }
621
622 return 1;
623}
624
625
626
627
628
629static int __init dmi_smbios3_present(const u8 *buf)
630{
631 if (memcmp(buf, "_SM3_", 5) == 0 &&
632 buf[6] < 32 && dmi_checksum(buf, buf[6])) {
633 dmi_ver = get_unaligned_be32(buf + 6) & 0xFFFFFF;
634 dmi_num = 0;
635 dmi_len = get_unaligned_le32(buf + 12);
636 dmi_base = get_unaligned_le64(buf + 16);
637 smbios_entry_point_size = buf[6];
638 memcpy(smbios_entry_point, buf, smbios_entry_point_size);
639
640 if (dmi_walk_early(dmi_decode) == 0) {
641 pr_info("SMBIOS %d.%d.%d present.\n",
642 dmi_ver >> 16, (dmi_ver >> 8) & 0xFF,
643 dmi_ver & 0xFF);
644 dmi_format_ids(dmi_ids_string, sizeof(dmi_ids_string));
645 pr_info("DMI: %s\n", dmi_ids_string);
646 return 0;
647 }
648 }
649 return 1;
650}
651
652static void __init dmi_scan_machine(void)
653{
654 char __iomem *p, *q;
655 char buf[32];
656
657 if (efi_enabled(EFI_CONFIG_TABLES)) {
658
659
660
661
662
663
664
665
666
667
668
669
670
671 if (efi.smbios3 != EFI_INVALID_TABLE_ADDR) {
672 p = dmi_early_remap(efi.smbios3, 32);
673 if (p == NULL)
674 goto error;
675 memcpy_fromio(buf, p, 32);
676 dmi_early_unmap(p, 32);
677
678 if (!dmi_smbios3_present(buf)) {
679 dmi_available = 1;
680 return;
681 }
682 }
683 if (efi.smbios == EFI_INVALID_TABLE_ADDR)
684 goto error;
685
686
687
688
689
690 p = dmi_early_remap(efi.smbios, 32);
691 if (p == NULL)
692 goto error;
693 memcpy_fromio(buf, p, 32);
694 dmi_early_unmap(p, 32);
695
696 if (!dmi_present(buf)) {
697 dmi_available = 1;
698 return;
699 }
700 } else if (IS_ENABLED(CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK)) {
701 p = dmi_early_remap(SMBIOS_ENTRY_POINT_SCAN_START, 0x10000);
702 if (p == NULL)
703 goto error;
704
705
706
707
708
709 memcpy_fromio(buf, p, 16);
710 for (q = p + 16; q < p + 0x10000; q += 16) {
711 memcpy_fromio(buf + 16, q, 16);
712 if (!dmi_smbios3_present(buf)) {
713 dmi_available = 1;
714 dmi_early_unmap(p, 0x10000);
715 return;
716 }
717 memcpy(buf, buf + 16, 16);
718 }
719
720
721
722
723
724
725
726
727 memset(buf, 0, 16);
728 for (q = p; q < p + 0x10000; q += 16) {
729 memcpy_fromio(buf + 16, q, 16);
730 if (!dmi_present(buf)) {
731 dmi_available = 1;
732 dmi_early_unmap(p, 0x10000);
733 return;
734 }
735 memcpy(buf, buf + 16, 16);
736 }
737 dmi_early_unmap(p, 0x10000);
738 }
739 error:
740 pr_info("DMI not present or invalid.\n");
741}
742
743static ssize_t raw_table_read(struct file *file, struct kobject *kobj,
744 struct bin_attribute *attr, char *buf,
745 loff_t pos, size_t count)
746{
747 memcpy(buf, attr->private + pos, count);
748 return count;
749}
750
751static BIN_ATTR(smbios_entry_point, S_IRUSR, raw_table_read, NULL, 0);
752static BIN_ATTR(DMI, S_IRUSR, raw_table_read, NULL, 0);
753
754static int __init dmi_init(void)
755{
756 struct kobject *tables_kobj;
757 u8 *dmi_table;
758 int ret = -ENOMEM;
759
760 if (!dmi_available)
761 return 0;
762
763
764
765
766
767
768 dmi_kobj = kobject_create_and_add("dmi", firmware_kobj);
769 if (!dmi_kobj)
770 goto err;
771
772 tables_kobj = kobject_create_and_add("tables", dmi_kobj);
773 if (!tables_kobj)
774 goto err;
775
776 dmi_table = dmi_remap(dmi_base, dmi_len);
777 if (!dmi_table)
778 goto err_tables;
779
780 bin_attr_smbios_entry_point.size = smbios_entry_point_size;
781 bin_attr_smbios_entry_point.private = smbios_entry_point;
782 ret = sysfs_create_bin_file(tables_kobj, &bin_attr_smbios_entry_point);
783 if (ret)
784 goto err_unmap;
785
786 bin_attr_DMI.size = dmi_len;
787 bin_attr_DMI.private = dmi_table;
788 ret = sysfs_create_bin_file(tables_kobj, &bin_attr_DMI);
789 if (!ret)
790 return 0;
791
792 sysfs_remove_bin_file(tables_kobj,
793 &bin_attr_smbios_entry_point);
794 err_unmap:
795 dmi_unmap(dmi_table);
796 err_tables:
797 kobject_del(tables_kobj);
798 kobject_put(tables_kobj);
799 err:
800 pr_err("dmi: Firmware registration failed.\n");
801
802 return ret;
803}
804subsys_initcall(dmi_init);
805
806
807
808
809
810
811
812
813
814void __init dmi_setup(void)
815{
816 dmi_scan_machine();
817 if (!dmi_available)
818 return;
819
820 dmi_memdev_walk();
821 dump_stack_set_arch_desc("%s", dmi_ids_string);
822}
823
824
825
826
827
828static bool dmi_matches(const struct dmi_system_id *dmi)
829{
830 int i;
831
832 for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) {
833 int s = dmi->matches[i].slot;
834 if (s == DMI_NONE)
835 break;
836 if (s == DMI_OEM_STRING) {
837
838 const struct dmi_device *valid;
839
840 valid = dmi_find_device(DMI_DEV_TYPE_OEM_STRING,
841 dmi->matches[i].substr, NULL);
842 if (valid)
843 continue;
844 } else if (dmi_ident[s]) {
845 if (dmi->matches[i].exact_match) {
846 if (!strcmp(dmi_ident[s],
847 dmi->matches[i].substr))
848 continue;
849 } else {
850 if (strstr(dmi_ident[s],
851 dmi->matches[i].substr))
852 continue;
853 }
854 }
855
856
857 return false;
858 }
859 return true;
860}
861
862
863
864
865
866static bool dmi_is_end_of_table(const struct dmi_system_id *dmi)
867{
868 return dmi->matches[0].slot == DMI_NONE;
869}
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886int dmi_check_system(const struct dmi_system_id *list)
887{
888 int count = 0;
889 const struct dmi_system_id *d;
890
891 for (d = list; !dmi_is_end_of_table(d); d++)
892 if (dmi_matches(d)) {
893 count++;
894 if (d->callback && d->callback(d))
895 break;
896 }
897
898 return count;
899}
900EXPORT_SYMBOL(dmi_check_system);
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list)
917{
918 const struct dmi_system_id *d;
919
920 for (d = list; !dmi_is_end_of_table(d); d++)
921 if (dmi_matches(d))
922 return d;
923
924 return NULL;
925}
926EXPORT_SYMBOL(dmi_first_match);
927
928
929
930
931
932
933
934
935const char *dmi_get_system_info(int field)
936{
937 return dmi_ident[field];
938}
939EXPORT_SYMBOL(dmi_get_system_info);
940
941
942
943
944
945int dmi_name_in_serial(const char *str)
946{
947 int f = DMI_PRODUCT_SERIAL;
948 if (dmi_ident[f] && strstr(dmi_ident[f], str))
949 return 1;
950 return 0;
951}
952
953
954
955
956
957int dmi_name_in_vendors(const char *str)
958{
959 static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE };
960 int i;
961 for (i = 0; fields[i] != DMI_NONE; i++) {
962 int f = fields[i];
963 if (dmi_ident[f] && strstr(dmi_ident[f], str))
964 return 1;
965 }
966 return 0;
967}
968EXPORT_SYMBOL(dmi_name_in_vendors);
969
970
971
972
973
974
975
976
977
978
979
980
981
982const struct dmi_device *dmi_find_device(int type, const char *name,
983 const struct dmi_device *from)
984{
985 const struct list_head *head = from ? &from->list : &dmi_devices;
986 struct list_head *d;
987
988 for (d = head->next; d != &dmi_devices; d = d->next) {
989 const struct dmi_device *dev =
990 list_entry(d, struct dmi_device, list);
991
992 if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
993 ((name == NULL) || (strcmp(dev->name, name) == 0)))
994 return dev;
995 }
996
997 return NULL;
998}
999EXPORT_SYMBOL(dmi_find_device);
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
1020{
1021 int year = 0, month = 0, day = 0;
1022 bool exists;
1023 const char *s, *y;
1024 char *e;
1025
1026 s = dmi_get_system_info(field);
1027 exists = s;
1028 if (!exists)
1029 goto out;
1030
1031
1032
1033
1034
1035
1036
1037 y = strrchr(s, '/');
1038 if (!y)
1039 goto out;
1040
1041 y++;
1042 year = simple_strtoul(y, &e, 10);
1043 if (y != e && year < 100) {
1044 year += 1900;
1045 if (year < 1996)
1046 year += 100;
1047 }
1048 if (year > 9999)
1049 year = 0;
1050
1051
1052 month = simple_strtoul(s, &e, 10);
1053 if (s == e || *e != '/' || !month || month > 12) {
1054 month = 0;
1055 goto out;
1056 }
1057
1058 s = e + 1;
1059 day = simple_strtoul(s, &e, 10);
1060 if (s == y || s == e || *e != '/' || day > 31)
1061 day = 0;
1062out:
1063 if (yearp)
1064 *yearp = year;
1065 if (monthp)
1066 *monthp = month;
1067 if (dayp)
1068 *dayp = day;
1069 return exists;
1070}
1071EXPORT_SYMBOL(dmi_get_date);
1072
1073
1074
1075
1076
1077
1078
1079
1080int dmi_get_bios_year(void)
1081{
1082 bool exists;
1083 int year;
1084
1085 exists = dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL);
1086 if (!exists)
1087 return -ENODATA;
1088
1089 return year ? year : -ERANGE;
1090}
1091EXPORT_SYMBOL(dmi_get_bios_year);
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101int dmi_walk(void (*decode)(const struct dmi_header *, void *),
1102 void *private_data)
1103{
1104 u8 *buf;
1105
1106 if (!dmi_available)
1107 return -ENXIO;
1108
1109 buf = dmi_remap(dmi_base, dmi_len);
1110 if (buf == NULL)
1111 return -ENOMEM;
1112
1113 dmi_decode_table(buf, decode, private_data);
1114
1115 dmi_unmap(buf);
1116 return 0;
1117}
1118EXPORT_SYMBOL_GPL(dmi_walk);
1119
1120
1121
1122
1123
1124
1125
1126
1127bool dmi_match(enum dmi_field f, const char *str)
1128{
1129 const char *info = dmi_get_system_info(f);
1130
1131 if (info == NULL || str == NULL)
1132 return info == str;
1133
1134 return !strcmp(info, str);
1135}
1136EXPORT_SYMBOL_GPL(dmi_match);
1137
1138void dmi_memdev_name(u16 handle, const char **bank, const char **device)
1139{
1140 int n;
1141
1142 if (dmi_memdev == NULL)
1143 return;
1144
1145 for (n = 0; n < dmi_memdev_nr; n++) {
1146 if (handle == dmi_memdev[n].handle) {
1147 *bank = dmi_memdev[n].bank;
1148 *device = dmi_memdev[n].device;
1149 break;
1150 }
1151 }
1152}
1153EXPORT_SYMBOL_GPL(dmi_memdev_name);
1154
1155u64 dmi_memdev_size(u16 handle)
1156{
1157 int n;
1158
1159 if (dmi_memdev) {
1160 for (n = 0; n < dmi_memdev_nr; n++) {
1161 if (handle == dmi_memdev[n].handle)
1162 return dmi_memdev[n].size;
1163 }
1164 }
1165 return ~0ull;
1166}
1167EXPORT_SYMBOL_GPL(dmi_memdev_size);
1168
1169
1170
1171
1172
1173
1174
1175
1176u8 dmi_memdev_type(u16 handle)
1177{
1178 int n;
1179
1180 if (dmi_memdev) {
1181 for (n = 0; n < dmi_memdev_nr; n++) {
1182 if (handle == dmi_memdev[n].handle)
1183 return dmi_memdev[n].type;
1184 }
1185 }
1186 return 0x0;
1187}
1188EXPORT_SYMBOL_GPL(dmi_memdev_type);
1189
1190
1191
1192
1193
1194
1195
1196
1197u16 dmi_memdev_handle(int slot)
1198{
1199 if (dmi_memdev && slot >= 0 && slot < dmi_memdev_nr)
1200 return dmi_memdev[slot].handle;
1201
1202 return 0xffff;
1203}
1204EXPORT_SYMBOL_GPL(dmi_memdev_handle);
1205