blob: d76adfea5df7c78bb6421a327f417ae3ed210fd6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/types.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07002#include <linux/string.h>
3#include <linux/init.h>
4#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005#include <linux/dmi.h>
Matt Domsch3ed3bce2006-03-26 01:37:03 -08006#include <linux/efi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/bootmem.h>
Andi Kleene9928672006-01-11 22:43:33 +01008#include <linux/slab.h>
Andi Kleenf2d3efe2006-03-25 16:30:22 +01009#include <asm/dmi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010
Paul Jacksoncb5dd7c2008-05-14 08:15:16 -070011/*
12 * DMI stands for "Desktop Management Interface". It is part
13 * of and an antecedent to, SMBIOS, which stands for System
14 * Management BIOS. See further: http://www.dmtf.org/standards
15 */
Parag Warudkar79da4722008-01-30 13:31:59 +010016static char dmi_empty_string[] = " ";
17
Ingo Molnar9a22b6e2008-09-18 12:50:18 +020018/*
19 * Catch too early calls to dmi_check_system():
20 */
21static int dmi_initialized;
22
Jean Delvaref3069ae2008-02-23 15:23:46 -080023static const char * __init dmi_string_nosave(const struct dmi_header *dm, u8 s)
Linus Torvalds1da177e2005-04-16 15:20:36 -070024{
Jeff Garzik18552562007-10-03 15:15:40 -040025 const u8 *bp = ((u8 *) dm) + dm->length;
Andrey Panin1249c512005-06-25 14:54:47 -070026
Andrey Paninc3c71202005-09-06 15:18:28 -070027 if (s) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 s--;
Andrey Paninc3c71202005-09-06 15:18:28 -070029 while (s > 0 && *bp) {
30 bp += strlen(bp) + 1;
31 s--;
32 }
33
34 if (*bp != 0) {
Parag Warudkar79da4722008-01-30 13:31:59 +010035 size_t len = strlen(bp)+1;
36 size_t cmp_len = len > 8 ? 8 : len;
37
38 if (!memcmp(bp, dmi_empty_string, cmp_len))
39 return dmi_empty_string;
Jean Delvaref3069ae2008-02-23 15:23:46 -080040 return bp;
Andrey Paninc3c71202005-09-06 15:18:28 -070041 }
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -070042 }
Andrey Paninc3c71202005-09-06 15:18:28 -070043
Jean Delvaref3069ae2008-02-23 15:23:46 -080044 return "";
45}
46
47static char * __init dmi_string(const struct dmi_header *dm, u8 s)
48{
49 const char *bp = dmi_string_nosave(dm, s);
50 char *str;
51 size_t len;
52
53 if (bp == dmi_empty_string)
54 return dmi_empty_string;
55
56 len = strlen(bp) + 1;
57 str = dmi_alloc(len);
58 if (str != NULL)
59 strcpy(str, bp);
60 else
61 printk(KERN_ERR "dmi_string: cannot allocate %Zu bytes.\n", len);
62
Andrey Paninc3c71202005-09-06 15:18:28 -070063 return str;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064}
65
66/*
67 * We have to be cautious here. We have seen BIOSes with DMI pointers
68 * pointing to completely the wrong place for example
69 */
Jean Delvare7fce0842007-11-03 17:29:20 +010070static void dmi_table(u8 *buf, int len, int num,
71 void (*decode)(const struct dmi_header *))
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Jean Delvare7fce0842007-11-03 17:29:20 +010073 u8 *data = buf;
Andrey Panin1249c512005-06-25 14:54:47 -070074 int i = 0;
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -070075
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 /*
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -070077 * Stop when we see all the items the table claimed to have
78 * OR we run off the end of the table (also happens)
79 */
Andrey Panin1249c512005-06-25 14:54:47 -070080 while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
Jeff Garzik18552562007-10-03 15:15:40 -040081 const struct dmi_header *dm = (const struct dmi_header *)data;
82
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 /*
Alan Cox86385452008-11-07 16:03:46 +000084 * We want to know the total length (formatted area and
85 * strings) before decoding to make sure we won't run off the
86 * table in dmi_decode or dmi_string
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 */
Andrey Panin1249c512005-06-25 14:54:47 -070088 data += dm->length;
89 while ((data - buf < len - 1) && (data[0] || data[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 data++;
Andrey Panin1249c512005-06-25 14:54:47 -070091 if (data - buf < len - 1)
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 decode(dm);
Andrey Panin1249c512005-06-25 14:54:47 -070093 data += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 i++;
95 }
Jean Delvare7fce0842007-11-03 17:29:20 +010096}
97
98static u32 dmi_base;
99static u16 dmi_len;
100static u16 dmi_num;
101
102static int __init dmi_walk_early(void (*decode)(const struct dmi_header *))
103{
104 u8 *buf;
105
106 buf = dmi_ioremap(dmi_base, dmi_len);
107 if (buf == NULL)
108 return -1;
109
110 dmi_table(buf, dmi_len, dmi_num, decode);
111
112 dmi_iounmap(buf, dmi_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 return 0;
114}
115
Jeff Garzik18552562007-10-03 15:15:40 -0400116static int __init dmi_checksum(const u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
Andrey Panin1249c512005-06-25 14:54:47 -0700118 u8 sum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 int a;
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -0700120
Andrey Panin1249c512005-06-25 14:54:47 -0700121 for (a = 0; a < 15; a++)
122 sum += buf[a];
123
124 return sum == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125}
126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127static char *dmi_ident[DMI_STRING_MAX];
Andrey Paninebad6a42005-09-06 15:18:29 -0700128static LIST_HEAD(dmi_devices);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200129int dmi_available;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
131/*
132 * Save a DMI string
133 */
Jeff Garzik18552562007-10-03 15:15:40 -0400134static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
Jeff Garzik18552562007-10-03 15:15:40 -0400136 const char *d = (const char*) dm;
137 char *p;
Andrey Panin1249c512005-06-25 14:54:47 -0700138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 if (dmi_ident[slot])
140 return;
Andrey Panin1249c512005-06-25 14:54:47 -0700141
Andrey Paninc3c71202005-09-06 15:18:28 -0700142 p = dmi_string(dm, d[string]);
143 if (p == NULL)
144 return;
145
146 dmi_ident[slot] = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147}
148
Jeff Garzik18552562007-10-03 15:15:40 -0400149static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index)
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200150{
Jeff Garzik18552562007-10-03 15:15:40 -0400151 const u8 *d = (u8*) dm + index;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200152 char *s;
153 int is_ff = 1, is_00 = 1, i;
154
155 if (dmi_ident[slot])
156 return;
157
158 for (i = 0; i < 16 && (is_ff || is_00); i++) {
159 if(d[i] != 0x00) is_ff = 0;
160 if(d[i] != 0xFF) is_00 = 0;
161 }
162
163 if (is_ff || is_00)
164 return;
165
166 s = dmi_alloc(16*2+4+1);
167 if (!s)
168 return;
169
170 sprintf(s,
171 "%02X%02X%02X%02X-%02X%02X-%02X%02X-%02X%02X-%02X%02X%02X%02X%02X%02X",
172 d[0], d[1], d[2], d[3], d[4], d[5], d[6], d[7],
173 d[8], d[9], d[10], d[11], d[12], d[13], d[14], d[15]);
174
175 dmi_ident[slot] = s;
176}
177
Jeff Garzik18552562007-10-03 15:15:40 -0400178static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index)
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200179{
Jeff Garzik18552562007-10-03 15:15:40 -0400180 const u8 *d = (u8*) dm + index;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200181 char *s;
182
183 if (dmi_ident[slot])
184 return;
185
186 s = dmi_alloc(4);
187 if (!s)
188 return;
189
190 sprintf(s, "%u", *d & 0x7F);
191 dmi_ident[slot] = s;
192}
193
Jean Delvaref3069ae2008-02-23 15:23:46 -0800194static void __init dmi_save_one_device(int type, const char *name)
195{
196 struct dmi_device *dev;
197
198 /* No duplicate device */
199 if (dmi_find_device(type, name, NULL))
200 return;
201
202 dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
203 if (!dev) {
204 printk(KERN_ERR "dmi_save_one_device: out of memory.\n");
205 return;
206 }
207
208 dev->type = type;
209 strcpy((char *)(dev + 1), name);
210 dev->name = (char *)(dev + 1);
211 dev->device_data = NULL;
212 list_add(&dev->list, &dmi_devices);
213}
214
Jeff Garzik18552562007-10-03 15:15:40 -0400215static void __init dmi_save_devices(const struct dmi_header *dm)
Andrey Paninebad6a42005-09-06 15:18:29 -0700216{
217 int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
Andrey Paninebad6a42005-09-06 15:18:29 -0700218
219 for (i = 0; i < count; i++) {
Jeff Garzik18552562007-10-03 15:15:40 -0400220 const char *d = (char *)(dm + 1) + (i * 2);
Andrey Paninebad6a42005-09-06 15:18:29 -0700221
222 /* Skip disabled device */
223 if ((*d & 0x80) == 0)
224 continue;
225
Jean Delvaref3069ae2008-02-23 15:23:46 -0800226 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700227 }
228}
229
Jeff Garzik18552562007-10-03 15:15:40 -0400230static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700231{
232 int i, count = *(u8 *)(dm + 1);
233 struct dmi_device *dev;
234
235 for (i = 1; i <= count; i++) {
Parag Warudkar79da4722008-01-30 13:31:59 +0100236 char *devname = dmi_string(dm, i);
237
Jean Delvare43fe1052008-02-23 15:23:55 -0800238 if (devname == dmi_empty_string)
Parag Warudkar79da4722008-01-30 13:31:59 +0100239 continue;
Parag Warudkar79da4722008-01-30 13:31:59 +0100240
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700241 dev = dmi_alloc(sizeof(*dev));
242 if (!dev) {
243 printk(KERN_ERR
244 "dmi_save_oem_strings_devices: out of memory.\n");
245 break;
246 }
247
248 dev->type = DMI_DEV_TYPE_OEM_STRING;
Parag Warudkar79da4722008-01-30 13:31:59 +0100249 dev->name = devname;
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700250 dev->device_data = NULL;
Andrey Paninebad6a42005-09-06 15:18:29 -0700251
252 list_add(&dev->list, &dmi_devices);
253 }
254}
255
Jeff Garzik18552562007-10-03 15:15:40 -0400256static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
Andrey Paninebad6a42005-09-06 15:18:29 -0700257{
258 struct dmi_device *dev;
259 void * data;
260
Andi Kleene9928672006-01-11 22:43:33 +0100261 data = dmi_alloc(dm->length);
Andrey Paninebad6a42005-09-06 15:18:29 -0700262 if (data == NULL) {
263 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
264 return;
265 }
266
267 memcpy(data, dm, dm->length);
268
Andi Kleene9928672006-01-11 22:43:33 +0100269 dev = dmi_alloc(sizeof(*dev));
Andrey Paninebad6a42005-09-06 15:18:29 -0700270 if (!dev) {
271 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
272 return;
273 }
274
275 dev->type = DMI_DEV_TYPE_IPMI;
276 dev->name = "IPMI controller";
277 dev->device_data = data;
278
Carol Hebertabd24df2008-04-04 14:30:03 -0700279 list_add_tail(&dev->list, &dmi_devices);
Andrey Paninebad6a42005-09-06 15:18:29 -0700280}
281
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800282static void __init dmi_save_extended_devices(const struct dmi_header *dm)
283{
284 const u8 *d = (u8*) dm + 5;
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800285
286 /* Skip disabled device */
287 if ((*d & 0x80) == 0)
288 return;
289
Jean Delvaref3069ae2008-02-23 15:23:46 -0800290 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800291}
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 * Process a DMI table entry. Right now all we care about are the BIOS
295 * and machine entries. For 2.5 we should pull the smbus controller info
296 * out of here.
297 */
Jeff Garzik18552562007-10-03 15:15:40 -0400298static void __init dmi_decode(const struct dmi_header *dm)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299{
Andrey Panin1249c512005-06-25 14:54:47 -0700300 switch(dm->type) {
Andrey Paninebad6a42005-09-06 15:18:29 -0700301 case 0: /* BIOS Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700302 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700303 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700304 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
305 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700306 case 1: /* System Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700307 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700308 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700309 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
Andrey Panin1249c512005-06-25 14:54:47 -0700310 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200311 dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
Andrey Panin1249c512005-06-25 14:54:47 -0700312 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700313 case 2: /* Base Board Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700314 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700315 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700316 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200317 dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
318 dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
319 break;
320 case 3: /* Chassis Information */
321 dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
322 dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
323 dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
324 dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
325 dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
Andrey Panin1249c512005-06-25 14:54:47 -0700326 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700327 case 10: /* Onboard Devices Information */
328 dmi_save_devices(dm);
329 break;
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700330 case 11: /* OEM Strings */
331 dmi_save_oem_strings_devices(dm);
332 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700333 case 38: /* IPMI Device Information */
334 dmi_save_ipmi_device(dm);
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800335 break;
336 case 41: /* Onboard Devices Extended Information */
337 dmi_save_extended_devices(dm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
339}
340
Jeff Garzik18552562007-10-03 15:15:40 -0400341static int __init dmi_present(const char __iomem *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342{
Andrey Panin61e032f2005-09-06 15:18:26 -0700343 u8 buf[15];
Jeff Garzik18552562007-10-03 15:15:40 -0400344
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800345 memcpy_fromio(buf, p, 15);
346 if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
Jean Delvare7fce0842007-11-03 17:29:20 +0100347 dmi_num = (buf[13] << 8) | buf[12];
348 dmi_len = (buf[7] << 8) | buf[6];
349 dmi_base = (buf[11] << 24) | (buf[10] << 16) |
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800350 (buf[9] << 8) | buf[8];
351
352 /*
353 * DMI version 0.0 means that the real version is taken from
354 * the SMBIOS version, which we don't know at this point.
355 */
356 if (buf[14] != 0)
357 printk(KERN_INFO "DMI %d.%d present.\n",
358 buf[14] >> 4, buf[14] & 0xF);
359 else
360 printk(KERN_INFO "DMI present.\n");
Jean Delvare7fce0842007-11-03 17:29:20 +0100361 if (dmi_walk_early(dmi_decode) == 0)
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800362 return 0;
363 }
364 return 1;
365}
366
367void __init dmi_scan_machine(void)
368{
Andrey Panin61e032f2005-09-06 15:18:26 -0700369 char __iomem *p, *q;
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800370 int rc;
Andrey Panin61e032f2005-09-06 15:18:26 -0700371
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800372 if (efi_enabled) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800373 if (efi.smbios == EFI_INVALID_TABLE_ADDR)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200374 goto error;
Andrey Panin61e032f2005-09-06 15:18:26 -0700375
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200376 /* This is called as a core_initcall() because it isn't
377 * needed during early boot. This also means we can
378 * iounmap the space when we're done with it.
379 */
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800380 p = dmi_ioremap(efi.smbios, 32);
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800381 if (p == NULL)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200382 goto error;
Andrey Panin61e032f2005-09-06 15:18:26 -0700383
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800384 rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
Tolentino, Matthew E23dd8422006-03-26 01:37:09 -0800385 dmi_iounmap(p, 32);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200386 if (!rc) {
387 dmi_available = 1;
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200388 goto out;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200389 }
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800390 }
391 else {
392 /*
393 * no iounmap() for that ioremap(); it would be a no-op, but
394 * it's so early in setup that sucker gets confused into doing
395 * what it shouldn't if we actually call it.
396 */
397 p = dmi_ioremap(0xF0000, 0x10000);
398 if (p == NULL)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200399 goto error;
Andrey Panin61e032f2005-09-06 15:18:26 -0700400
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800401 for (q = p; q < p + 0x10000; q += 16) {
402 rc = dmi_present(q);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200403 if (!rc) {
404 dmi_available = 1;
Ingo Molnar0d644842008-01-30 13:33:09 +0100405 dmi_iounmap(p, 0x10000);
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200406 goto out;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200407 }
Andrey Panin61e032f2005-09-06 15:18:26 -0700408 }
Yinghai Lu3212bff2008-01-30 13:33:32 +0100409 dmi_iounmap(p, 0x10000);
Andrey Panin61e032f2005-09-06 15:18:26 -0700410 }
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200411 error:
412 printk(KERN_INFO "DMI not present or invalid.\n");
413 out:
414 dmi_initialized = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415}
416
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417/**
418 * dmi_check_system - check system DMI data
419 * @list: array of dmi_system_id structures to match against
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700420 * All non-null elements of the list must match
421 * their slot's (field index's) data (i.e., each
422 * list string must be a substring of the specified
423 * DMI slot's string data) to be considered a
424 * successful match.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 *
426 * Walk the blacklist table running matching functions until someone
427 * returns non zero or we hit the end. Callback function is called for
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700428 * each successful match. Returns the number of matches.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 */
Jeff Garzik18552562007-10-03 15:15:40 -0400430int dmi_check_system(const struct dmi_system_id *list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431{
432 int i, count = 0;
Jeff Garzik18552562007-10-03 15:15:40 -0400433 const struct dmi_system_id *d = list;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200435 WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
436
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 while (d->ident) {
438 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
439 int s = d->matches[i].slot;
440 if (s == DMI_NONE)
441 continue;
442 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
443 continue;
444 /* No match */
445 goto fail;
446 }
Robert Love640e8032005-09-06 15:18:30 -0700447 count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 if (d->callback && d->callback(d))
449 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450fail: d++;
451 }
452
453 return count;
454}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455EXPORT_SYMBOL(dmi_check_system);
456
457/**
458 * dmi_get_system_info - return DMI data value
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700459 * @field: data index (see enum dmi_field)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 *
461 * Returns one DMI data value, can be used to perform
462 * complex DMI data checks.
463 */
Jeff Garzik18552562007-10-03 15:15:40 -0400464const char *dmi_get_system_info(int field)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465{
466 return dmi_ident[field];
467}
Dmitry Torokhove70c9d52005-06-25 14:54:25 -0700468EXPORT_SYMBOL(dmi_get_system_info);
Andrey Paninebad6a42005-09-06 15:18:29 -0700469
Alok Katariafd8cd7e2008-11-03 15:50:38 -0800470/**
Randy Dunlapc2bacfc2009-01-06 14:41:40 -0800471 * dmi_name_in_serial - Check if string is in the DMI product serial information
472 * @str: string to check for
Alok Katariafd8cd7e2008-11-03 15:50:38 -0800473 */
474int dmi_name_in_serial(const char *str)
475{
476 int f = DMI_PRODUCT_SERIAL;
477 if (dmi_ident[f] && strstr(dmi_ident[f], str))
478 return 1;
479 return 0;
480}
Andi Kleena1bae672006-10-21 18:37:02 +0200481
482/**
483 * dmi_name_in_vendors - Check if string is anywhere in the DMI vendor information.
484 * @str: Case sensitive Name
485 */
Jeff Garzik18552562007-10-03 15:15:40 -0400486int dmi_name_in_vendors(const char *str)
Andi Kleena1bae672006-10-21 18:37:02 +0200487{
488 static int fields[] = { DMI_BIOS_VENDOR, DMI_BIOS_VERSION, DMI_SYS_VENDOR,
489 DMI_PRODUCT_NAME, DMI_PRODUCT_VERSION, DMI_BOARD_VENDOR,
490 DMI_BOARD_NAME, DMI_BOARD_VERSION, DMI_NONE };
491 int i;
492 for (i = 0; fields[i] != DMI_NONE; i++) {
493 int f = fields[i];
494 if (dmi_ident[f] && strstr(dmi_ident[f], str))
495 return 1;
496 }
497 return 0;
498}
499EXPORT_SYMBOL(dmi_name_in_vendors);
500
Andrey Paninebad6a42005-09-06 15:18:29 -0700501/**
502 * dmi_find_device - find onboard device by type/name
503 * @type: device type or %DMI_DEV_TYPE_ANY to match all device types
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700504 * @name: device name string or %NULL to match all
Andrey Paninebad6a42005-09-06 15:18:29 -0700505 * @from: previous device found in search, or %NULL for new search.
506 *
507 * Iterates through the list of known onboard devices. If a device is
508 * found with a matching @vendor and @device, a pointer to its device
509 * structure is returned. Otherwise, %NULL is returned.
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700510 * A new search is initiated by passing %NULL as the @from argument.
Andrey Paninebad6a42005-09-06 15:18:29 -0700511 * If @from is not %NULL, searches continue from next device.
512 */
Jeff Garzik18552562007-10-03 15:15:40 -0400513const struct dmi_device * dmi_find_device(int type, const char *name,
514 const struct dmi_device *from)
Andrey Paninebad6a42005-09-06 15:18:29 -0700515{
Jeff Garzik18552562007-10-03 15:15:40 -0400516 const struct list_head *head = from ? &from->list : &dmi_devices;
517 struct list_head *d;
Andrey Paninebad6a42005-09-06 15:18:29 -0700518
519 for(d = head->next; d != &dmi_devices; d = d->next) {
Jeff Garzik18552562007-10-03 15:15:40 -0400520 const struct dmi_device *dev =
521 list_entry(d, struct dmi_device, list);
Andrey Paninebad6a42005-09-06 15:18:29 -0700522
523 if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
524 ((name == NULL) || (strcmp(dev->name, name) == 0)))
525 return dev;
526 }
527
528 return NULL;
529}
530EXPORT_SYMBOL(dmi_find_device);
Andi Kleenf083a322006-03-25 16:30:19 +0100531
532/**
533 * dmi_get_year - Return year of a DMI date
534 * @field: data index (like dmi_get_system_info)
535 *
536 * Returns -1 when the field doesn't exist. 0 when it is broken.
537 */
538int dmi_get_year(int field)
539{
540 int year;
Jeff Garzik18552562007-10-03 15:15:40 -0400541 const char *s = dmi_get_system_info(field);
Andi Kleenf083a322006-03-25 16:30:19 +0100542
543 if (!s)
544 return -1;
545 if (*s == '\0')
546 return 0;
547 s = strrchr(s, '/');
548 if (!s)
549 return 0;
550
551 s += 1;
552 year = simple_strtoul(s, NULL, 0);
553 if (year && year < 100) { /* 2-digit year */
554 year += 1900;
555 if (year < 1996) /* no dates < spec 1.0 */
556 year += 100;
557 }
558
559 return year;
560}
Jean Delvare7fce0842007-11-03 17:29:20 +0100561
562/**
563 * dmi_walk - Walk the DMI table and get called back for every record
564 * @decode: Callback function
565 *
566 * Returns -1 when the DMI table can't be reached, 0 on success.
567 */
568int dmi_walk(void (*decode)(const struct dmi_header *))
569{
570 u8 *buf;
571
572 if (!dmi_available)
573 return -1;
574
575 buf = ioremap(dmi_base, dmi_len);
576 if (buf == NULL)
577 return -1;
578
579 dmi_table(buf, dmi_len, dmi_num, decode);
580
581 iounmap(buf);
582 return 0;
583}
584EXPORT_SYMBOL_GPL(dmi_walk);
Jiri Slabyd61c72e2008-12-10 14:07:21 +0100585
586/**
587 * dmi_match - compare a string to the dmi field (if exists)
Randy Dunlapc2bacfc2009-01-06 14:41:40 -0800588 * @f: DMI field identifier
589 * @str: string to compare the DMI field to
Jiri Slabyd61c72e2008-12-10 14:07:21 +0100590 *
591 * Returns true if the requested field equals to the str (including NULL).
592 */
593bool dmi_match(enum dmi_field f, const char *str)
594{
595 const char *info = dmi_get_system_info(f);
596
597 if (info == NULL || str == NULL)
598 return info == str;
599
600 return !strcmp(info, str);
601}
602EXPORT_SYMBOL_GPL(dmi_match);