blob: 153980be4ee64462f12a97563c0143fc59b3eb82 [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>
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -07005#include <linux/ctype.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/dmi.h>
Matt Domsch3ed3bce2006-03-26 01:37:03 -08007#include <linux/efi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008#include <linux/bootmem.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,
Jean Delvaree7a19c562009-03-30 21:46:44 +020071 void (*decode)(const struct dmi_header *, void *),
72 void *private_data)
Linus Torvalds1da177e2005-04-16 15:20:36 -070073{
Jean Delvare7fce0842007-11-03 17:29:20 +010074 u8 *data = buf;
Andrey Panin1249c512005-06-25 14:54:47 -070075 int i = 0;
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -070076
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 /*
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -070078 * Stop when we see all the items the table claimed to have
79 * OR we run off the end of the table (also happens)
80 */
Andrey Panin1249c512005-06-25 14:54:47 -070081 while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
Jeff Garzik18552562007-10-03 15:15:40 -040082 const struct dmi_header *dm = (const struct dmi_header *)data;
83
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 /*
Alan Cox86385452008-11-07 16:03:46 +000085 * We want to know the total length (formatted area and
86 * strings) before decoding to make sure we won't run off the
87 * table in dmi_decode or dmi_string
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 */
Andrey Panin1249c512005-06-25 14:54:47 -070089 data += dm->length;
90 while ((data - buf < len - 1) && (data[0] || data[1]))
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 data++;
Andrey Panin1249c512005-06-25 14:54:47 -070092 if (data - buf < len - 1)
Jean Delvaree7a19c562009-03-30 21:46:44 +020093 decode(dm, private_data);
Andrey Panin1249c512005-06-25 14:54:47 -070094 data += 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 i++;
96 }
Jean Delvare7fce0842007-11-03 17:29:20 +010097}
98
99static u32 dmi_base;
100static u16 dmi_len;
101static u16 dmi_num;
102
Jean Delvaree7a19c562009-03-30 21:46:44 +0200103static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
104 void *))
Jean Delvare7fce0842007-11-03 17:29:20 +0100105{
106 u8 *buf;
107
108 buf = dmi_ioremap(dmi_base, dmi_len);
109 if (buf == NULL)
110 return -1;
111
Jean Delvaree7a19c562009-03-30 21:46:44 +0200112 dmi_table(buf, dmi_len, dmi_num, decode, NULL);
Jean Delvare7fce0842007-11-03 17:29:20 +0100113
114 dmi_iounmap(buf, dmi_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 return 0;
116}
117
Jeff Garzik18552562007-10-03 15:15:40 -0400118static int __init dmi_checksum(const u8 *buf)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
Andrey Panin1249c512005-06-25 14:54:47 -0700120 u8 sum = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 int a;
Bjorn Helgaas4f705ae2006-04-03 17:09:22 -0700122
Andrey Panin1249c512005-06-25 14:54:47 -0700123 for (a = 0; a < 15; a++)
124 sum += buf[a];
125
126 return sum == 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static char *dmi_ident[DMI_STRING_MAX];
Andrey Paninebad6a42005-09-06 15:18:29 -0700130static LIST_HEAD(dmi_devices);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200131int dmi_available;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
133/*
134 * Save a DMI string
135 */
Jeff Garzik18552562007-10-03 15:15:40 -0400136static void __init dmi_save_ident(const struct dmi_header *dm, int slot, int string)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
Jeff Garzik18552562007-10-03 15:15:40 -0400138 const char *d = (const char*) dm;
139 char *p;
Andrey Panin1249c512005-06-25 14:54:47 -0700140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 if (dmi_ident[slot])
142 return;
Andrey Panin1249c512005-06-25 14:54:47 -0700143
Andrey Paninc3c71202005-09-06 15:18:28 -0700144 p = dmi_string(dm, d[string]);
145 if (p == NULL)
146 return;
147
148 dmi_ident[slot] = p;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149}
150
Jeff Garzik18552562007-10-03 15:15:40 -0400151static void __init dmi_save_uuid(const struct dmi_header *dm, int slot, int index)
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200152{
Jeff Garzik18552562007-10-03 15:15:40 -0400153 const u8 *d = (u8*) dm + index;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200154 char *s;
155 int is_ff = 1, is_00 = 1, i;
156
157 if (dmi_ident[slot])
158 return;
159
160 for (i = 0; i < 16 && (is_ff || is_00); i++) {
161 if(d[i] != 0x00) is_ff = 0;
162 if(d[i] != 0xFF) is_00 = 0;
163 }
164
165 if (is_ff || is_00)
166 return;
167
168 s = dmi_alloc(16*2+4+1);
169 if (!s)
170 return;
171
Joe Perchesbc058f62009-12-14 18:01:11 -0800172 sprintf(s, "%pUB", d);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200173
174 dmi_ident[slot] = s;
175}
176
Jeff Garzik18552562007-10-03 15:15:40 -0400177static void __init dmi_save_type(const struct dmi_header *dm, int slot, int index)
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200178{
Jeff Garzik18552562007-10-03 15:15:40 -0400179 const u8 *d = (u8*) dm + index;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200180 char *s;
181
182 if (dmi_ident[slot])
183 return;
184
185 s = dmi_alloc(4);
186 if (!s)
187 return;
188
189 sprintf(s, "%u", *d & 0x7F);
190 dmi_ident[slot] = s;
191}
192
Jean Delvaref3069ae2008-02-23 15:23:46 -0800193static void __init dmi_save_one_device(int type, const char *name)
194{
195 struct dmi_device *dev;
196
197 /* No duplicate device */
198 if (dmi_find_device(type, name, NULL))
199 return;
200
201 dev = dmi_alloc(sizeof(*dev) + strlen(name) + 1);
202 if (!dev) {
203 printk(KERN_ERR "dmi_save_one_device: out of memory.\n");
204 return;
205 }
206
207 dev->type = type;
208 strcpy((char *)(dev + 1), name);
209 dev->name = (char *)(dev + 1);
210 dev->device_data = NULL;
211 list_add(&dev->list, &dmi_devices);
212}
213
Jeff Garzik18552562007-10-03 15:15:40 -0400214static void __init dmi_save_devices(const struct dmi_header *dm)
Andrey Paninebad6a42005-09-06 15:18:29 -0700215{
216 int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
Andrey Paninebad6a42005-09-06 15:18:29 -0700217
218 for (i = 0; i < count; i++) {
Jeff Garzik18552562007-10-03 15:15:40 -0400219 const char *d = (char *)(dm + 1) + (i * 2);
Andrey Paninebad6a42005-09-06 15:18:29 -0700220
221 /* Skip disabled device */
222 if ((*d & 0x80) == 0)
223 continue;
224
Jean Delvaref3069ae2008-02-23 15:23:46 -0800225 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d + 1)));
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700226 }
227}
228
Jeff Garzik18552562007-10-03 15:15:40 -0400229static void __init dmi_save_oem_strings_devices(const struct dmi_header *dm)
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700230{
231 int i, count = *(u8 *)(dm + 1);
232 struct dmi_device *dev;
233
234 for (i = 1; i <= count; i++) {
Parag Warudkar79da4722008-01-30 13:31:59 +0100235 char *devname = dmi_string(dm, i);
236
Jean Delvare43fe1052008-02-23 15:23:55 -0800237 if (devname == dmi_empty_string)
Parag Warudkar79da4722008-01-30 13:31:59 +0100238 continue;
Parag Warudkar79da4722008-01-30 13:31:59 +0100239
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700240 dev = dmi_alloc(sizeof(*dev));
241 if (!dev) {
242 printk(KERN_ERR
243 "dmi_save_oem_strings_devices: out of memory.\n");
244 break;
245 }
246
247 dev->type = DMI_DEV_TYPE_OEM_STRING;
Parag Warudkar79da4722008-01-30 13:31:59 +0100248 dev->name = devname;
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700249 dev->device_data = NULL;
Andrey Paninebad6a42005-09-06 15:18:29 -0700250
251 list_add(&dev->list, &dmi_devices);
252 }
253}
254
Jeff Garzik18552562007-10-03 15:15:40 -0400255static void __init dmi_save_ipmi_device(const struct dmi_header *dm)
Andrey Paninebad6a42005-09-06 15:18:29 -0700256{
257 struct dmi_device *dev;
258 void * data;
259
Andi Kleene9928672006-01-11 22:43:33 +0100260 data = dmi_alloc(dm->length);
Andrey Paninebad6a42005-09-06 15:18:29 -0700261 if (data == NULL) {
262 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
263 return;
264 }
265
266 memcpy(data, dm, dm->length);
267
Andi Kleene9928672006-01-11 22:43:33 +0100268 dev = dmi_alloc(sizeof(*dev));
Andrey Paninebad6a42005-09-06 15:18:29 -0700269 if (!dev) {
270 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
271 return;
272 }
273
274 dev->type = DMI_DEV_TYPE_IPMI;
275 dev->name = "IPMI controller";
276 dev->device_data = data;
277
Carol Hebertabd24df2008-04-04 14:30:03 -0700278 list_add_tail(&dev->list, &dmi_devices);
Andrey Paninebad6a42005-09-06 15:18:29 -0700279}
280
Narendra K911e1c92010-07-26 05:56:50 -0500281static void __init dmi_save_dev_onboard(int instance, int segment, int bus,
282 int devfn, const char *name)
283{
284 struct dmi_dev_onboard *onboard_dev;
285
286 onboard_dev = dmi_alloc(sizeof(*onboard_dev) + strlen(name) + 1);
287 if (!onboard_dev) {
288 printk(KERN_ERR "dmi_save_dev_onboard: out of memory.\n");
289 return;
290 }
291 onboard_dev->instance = instance;
292 onboard_dev->segment = segment;
293 onboard_dev->bus = bus;
294 onboard_dev->devfn = devfn;
295
296 strcpy((char *)&onboard_dev[1], name);
297 onboard_dev->dev.type = DMI_DEV_TYPE_DEV_ONBOARD;
298 onboard_dev->dev.name = (char *)&onboard_dev[1];
299 onboard_dev->dev.device_data = onboard_dev;
300
301 list_add(&onboard_dev->dev.list, &dmi_devices);
302}
303
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800304static void __init dmi_save_extended_devices(const struct dmi_header *dm)
305{
306 const u8 *d = (u8*) dm + 5;
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800307
308 /* Skip disabled device */
309 if ((*d & 0x80) == 0)
310 return;
311
Narendra K911e1c92010-07-26 05:56:50 -0500312 dmi_save_dev_onboard(*(d+1), *(u16 *)(d+2), *(d+4), *(d+5),
313 dmi_string_nosave(dm, *(d-1)));
Jean Delvaref3069ae2008-02-23 15:23:46 -0800314 dmi_save_one_device(*d & 0x7f, dmi_string_nosave(dm, *(d - 1)));
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800315}
316
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 * Process a DMI table entry. Right now all we care about are the BIOS
319 * and machine entries. For 2.5 we should pull the smbus controller info
320 * out of here.
321 */
Jean Delvaree7a19c562009-03-30 21:46:44 +0200322static void __init dmi_decode(const struct dmi_header *dm, void *dummy)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323{
Andrey Panin1249c512005-06-25 14:54:47 -0700324 switch(dm->type) {
Andrey Paninebad6a42005-09-06 15:18:29 -0700325 case 0: /* BIOS Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700326 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700327 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700328 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
329 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700330 case 1: /* System Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700331 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700332 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700333 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
Andrey Panin1249c512005-06-25 14:54:47 -0700334 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200335 dmi_save_uuid(dm, DMI_PRODUCT_UUID, 8);
Andrey Panin1249c512005-06-25 14:54:47 -0700336 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700337 case 2: /* Base Board Information */
Andrey Panin1249c512005-06-25 14:54:47 -0700338 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
Andrey Panin1249c512005-06-25 14:54:47 -0700339 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
Andrey Panin1249c512005-06-25 14:54:47 -0700340 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200341 dmi_save_ident(dm, DMI_BOARD_SERIAL, 7);
342 dmi_save_ident(dm, DMI_BOARD_ASSET_TAG, 8);
343 break;
344 case 3: /* Chassis Information */
345 dmi_save_ident(dm, DMI_CHASSIS_VENDOR, 4);
346 dmi_save_type(dm, DMI_CHASSIS_TYPE, 5);
347 dmi_save_ident(dm, DMI_CHASSIS_VERSION, 6);
348 dmi_save_ident(dm, DMI_CHASSIS_SERIAL, 7);
349 dmi_save_ident(dm, DMI_CHASSIS_ASSET_TAG, 8);
Andrey Panin1249c512005-06-25 14:54:47 -0700350 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700351 case 10: /* Onboard Devices Information */
352 dmi_save_devices(dm);
353 break;
Shem Multinymous2e0c1f62006-09-29 01:59:37 -0700354 case 11: /* OEM Strings */
355 dmi_save_oem_strings_devices(dm);
356 break;
Andrey Paninebad6a42005-09-06 15:18:29 -0700357 case 38: /* IPMI Device Information */
358 dmi_save_ipmi_device(dm);
Wim Van Sebroeckb4bd7d52008-02-08 04:20:58 -0800359 break;
360 case 41: /* Onboard Devices Extended Information */
361 dmi_save_extended_devices(dm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
363}
364
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700365static void __init print_filtered(const char *info)
366{
367 const char *p;
368
369 if (!info)
370 return;
371
372 for (p = info; *p; p++)
373 if (isprint(*p))
374 printk(KERN_CONT "%c", *p);
375 else
376 printk(KERN_CONT "\\x%02x", *p & 0xff);
377}
378
379static void __init dmi_dump_ids(void)
380{
Naga Chumbalkar84e383b2011-02-14 22:47:17 +0000381 const char *board; /* Board Name is optional */
382
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700383 printk(KERN_DEBUG "DMI: ");
Naga Chumbalkar84e383b2011-02-14 22:47:17 +0000384 print_filtered(dmi_get_system_info(DMI_SYS_VENDOR));
385 printk(KERN_CONT " ");
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700386 print_filtered(dmi_get_system_info(DMI_PRODUCT_NAME));
Naga Chumbalkar84e383b2011-02-14 22:47:17 +0000387 board = dmi_get_system_info(DMI_BOARD_NAME);
388 if (board) {
389 printk(KERN_CONT "/");
390 print_filtered(board);
391 }
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700392 printk(KERN_CONT ", BIOS ");
393 print_filtered(dmi_get_system_info(DMI_BIOS_VERSION));
394 printk(KERN_CONT " ");
395 print_filtered(dmi_get_system_info(DMI_BIOS_DATE));
396 printk(KERN_CONT "\n");
397}
398
Jeff Garzik18552562007-10-03 15:15:40 -0400399static int __init dmi_present(const char __iomem *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400{
Andrey Panin61e032fa2005-09-06 15:18:26 -0700401 u8 buf[15];
Jeff Garzik18552562007-10-03 15:15:40 -0400402
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800403 memcpy_fromio(buf, p, 15);
404 if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
Jean Delvare7fce0842007-11-03 17:29:20 +0100405 dmi_num = (buf[13] << 8) | buf[12];
406 dmi_len = (buf[7] << 8) | buf[6];
407 dmi_base = (buf[11] << 24) | (buf[10] << 16) |
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800408 (buf[9] << 8) | buf[8];
409
410 /*
411 * DMI version 0.0 means that the real version is taken from
412 * the SMBIOS version, which we don't know at this point.
413 */
414 if (buf[14] != 0)
415 printk(KERN_INFO "DMI %d.%d present.\n",
416 buf[14] >> 4, buf[14] & 0xF);
417 else
418 printk(KERN_INFO "DMI present.\n");
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700419 if (dmi_walk_early(dmi_decode) == 0) {
420 dmi_dump_ids();
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800421 return 0;
Bjorn Helgaas8881cdc2010-10-27 15:32:59 -0700422 }
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800423 }
424 return 1;
425}
426
427void __init dmi_scan_machine(void)
428{
Andrey Panin61e032fa2005-09-06 15:18:26 -0700429 char __iomem *p, *q;
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800430 int rc;
Andrey Panin61e032fa2005-09-06 15:18:26 -0700431
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800432 if (efi_enabled) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800433 if (efi.smbios == EFI_INVALID_TABLE_ADDR)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200434 goto error;
Andrey Panin61e032fa2005-09-06 15:18:26 -0700435
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200436 /* This is called as a core_initcall() because it isn't
437 * needed during early boot. This also means we can
438 * iounmap the space when we're done with it.
439 */
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800440 p = dmi_ioremap(efi.smbios, 32);
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800441 if (p == NULL)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200442 goto error;
Andrey Panin61e032fa2005-09-06 15:18:26 -0700443
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800444 rc = dmi_present(p + 0x10); /* offset of _DMI_ string */
Tolentino, Matthew E23dd8422006-03-26 01:37:09 -0800445 dmi_iounmap(p, 32);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200446 if (!rc) {
447 dmi_available = 1;
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200448 goto out;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200449 }
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800450 }
451 else {
452 /*
453 * no iounmap() for that ioremap(); it would be a no-op, but
454 * it's so early in setup that sucker gets confused into doing
455 * what it shouldn't if we actually call it.
456 */
457 p = dmi_ioremap(0xF0000, 0x10000);
458 if (p == NULL)
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200459 goto error;
Andrey Panin61e032fa2005-09-06 15:18:26 -0700460
Matt Domsch3ed3bce2006-03-26 01:37:03 -0800461 for (q = p; q < p + 0x10000; q += 16) {
462 rc = dmi_present(q);
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200463 if (!rc) {
464 dmi_available = 1;
Ingo Molnar0d644842008-01-30 13:33:09 +0100465 dmi_iounmap(p, 0x10000);
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200466 goto out;
Lennart Poettering4f5c7912007-05-08 22:07:02 +0200467 }
Andrey Panin61e032fa2005-09-06 15:18:26 -0700468 }
Yinghai Lu3212bff2008-01-30 13:33:32 +0100469 dmi_iounmap(p, 0x10000);
Andrey Panin61e032fa2005-09-06 15:18:26 -0700470 }
Ingo Molnar9a22b6e2008-09-18 12:50:18 +0200471 error:
472 printk(KERN_INFO "DMI not present or invalid.\n");
473 out:
474 dmi_initialized = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475}
476
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477/**
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100478 * dmi_matches - check if dmi_system_id structure matches system DMI data
479 * @dmi: pointer to the dmi_system_id structure to check
480 */
481static bool dmi_matches(const struct dmi_system_id *dmi)
482{
483 int i;
484
485 WARN(!dmi_initialized, KERN_ERR "dmi check: not initialized yet.\n");
486
487 for (i = 0; i < ARRAY_SIZE(dmi->matches); i++) {
488 int s = dmi->matches[i].slot;
489 if (s == DMI_NONE)
Dmitry Torokhov75757502009-12-04 10:24:19 -0800490 break;
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100491 if (dmi_ident[s]
492 && strstr(dmi_ident[s], dmi->matches[i].substr))
493 continue;
494 /* No match */
495 return false;
496 }
497 return true;
498}
499
500/**
Dmitry Torokhov75757502009-12-04 10:24:19 -0800501 * dmi_is_end_of_table - check for end-of-table marker
502 * @dmi: pointer to the dmi_system_id structure to check
503 */
504static bool dmi_is_end_of_table(const struct dmi_system_id *dmi)
505{
506 return dmi->matches[0].slot == DMI_NONE;
507}
508
509/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 * dmi_check_system - check system DMI data
511 * @list: array of dmi_system_id structures to match against
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700512 * All non-null elements of the list must match
513 * their slot's (field index's) data (i.e., each
514 * list string must be a substring of the specified
515 * DMI slot's string data) to be considered a
516 * successful match.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 *
518 * Walk the blacklist table running matching functions until someone
519 * returns non zero or we hit the end. Callback function is called for
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700520 * each successful match. Returns the number of matches.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 */
Jeff Garzik18552562007-10-03 15:15:40 -0400522int dmi_check_system(const struct dmi_system_id *list)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523{
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100524 int count = 0;
525 const struct dmi_system_id *d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526
Dmitry Torokhov75757502009-12-04 10:24:19 -0800527 for (d = list; !dmi_is_end_of_table(d); d++)
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100528 if (dmi_matches(d)) {
529 count++;
530 if (d->callback && d->callback(d))
531 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533
534 return count;
535}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536EXPORT_SYMBOL(dmi_check_system);
537
538/**
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100539 * dmi_first_match - find dmi_system_id structure matching system DMI data
540 * @list: array of dmi_system_id structures to match against
541 * All non-null elements of the list must match
542 * their slot's (field index's) data (i.e., each
543 * list string must be a substring of the specified
544 * DMI slot's string data) to be considered a
545 * successful match.
546 *
547 * Walk the blacklist table until the first match is found. Return the
548 * pointer to the matching entry or NULL if there's no match.
549 */
550const struct dmi_system_id *dmi_first_match(const struct dmi_system_id *list)
551{
552 const struct dmi_system_id *d;
553
Dmitry Torokhov75757502009-12-04 10:24:19 -0800554 for (d = list; !dmi_is_end_of_table(d); d++)
Rafael J. Wysockid7b19562009-01-19 20:55:50 +0100555 if (dmi_matches(d))
556 return d;
557
558 return NULL;
559}
560EXPORT_SYMBOL(dmi_first_match);
561
562/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 * dmi_get_system_info - return DMI data value
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700564 * @field: data index (see enum dmi_field)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 *
566 * Returns one DMI data value, can be used to perform
567 * complex DMI data checks.
568 */
Jeff Garzik18552562007-10-03 15:15:40 -0400569const char *dmi_get_system_info(int field)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570{
571 return dmi_ident[field];
572}
Dmitry Torokhove70c9d52005-06-25 14:54:25 -0700573EXPORT_SYMBOL(dmi_get_system_info);
Andrey Paninebad6a42005-09-06 15:18:29 -0700574
Alok Katariafd8cd7e2008-11-03 15:50:38 -0800575/**
Randy Dunlapc2bacfc2009-01-06 14:41:40 -0800576 * dmi_name_in_serial - Check if string is in the DMI product serial information
577 * @str: string to check for
Alok Katariafd8cd7e2008-11-03 15:50:38 -0800578 */
579int dmi_name_in_serial(const char *str)
580{
581 int f = DMI_PRODUCT_SERIAL;
582 if (dmi_ident[f] && strstr(dmi_ident[f], str))
583 return 1;
584 return 0;
585}
Andi Kleena1bae672006-10-21 18:37:02 +0200586
587/**
Jean Delvare66e13e62011-11-15 14:36:09 -0800588 * dmi_name_in_vendors - Check if string is in the DMI system or board vendor name
Andi Kleena1bae672006-10-21 18:37:02 +0200589 * @str: Case sensitive Name
590 */
Jeff Garzik18552562007-10-03 15:15:40 -0400591int dmi_name_in_vendors(const char *str)
Andi Kleena1bae672006-10-21 18:37:02 +0200592{
Jean Delvare66e13e62011-11-15 14:36:09 -0800593 static int fields[] = { DMI_SYS_VENDOR, DMI_BOARD_VENDOR, DMI_NONE };
Andi Kleena1bae672006-10-21 18:37:02 +0200594 int i;
595 for (i = 0; fields[i] != DMI_NONE; i++) {
596 int f = fields[i];
597 if (dmi_ident[f] && strstr(dmi_ident[f], str))
598 return 1;
599 }
600 return 0;
601}
602EXPORT_SYMBOL(dmi_name_in_vendors);
603
Andrey Paninebad6a42005-09-06 15:18:29 -0700604/**
605 * dmi_find_device - find onboard device by type/name
606 * @type: device type or %DMI_DEV_TYPE_ANY to match all device types
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700607 * @name: device name string or %NULL to match all
Andrey Paninebad6a42005-09-06 15:18:29 -0700608 * @from: previous device found in search, or %NULL for new search.
609 *
610 * Iterates through the list of known onboard devices. If a device is
611 * found with a matching @vendor and @device, a pointer to its device
612 * structure is returned. Otherwise, %NULL is returned.
Randy Dunlapb0ef3712006-06-25 05:49:18 -0700613 * A new search is initiated by passing %NULL as the @from argument.
Andrey Paninebad6a42005-09-06 15:18:29 -0700614 * If @from is not %NULL, searches continue from next device.
615 */
Jeff Garzik18552562007-10-03 15:15:40 -0400616const struct dmi_device * dmi_find_device(int type, const char *name,
617 const struct dmi_device *from)
Andrey Paninebad6a42005-09-06 15:18:29 -0700618{
Jeff Garzik18552562007-10-03 15:15:40 -0400619 const struct list_head *head = from ? &from->list : &dmi_devices;
620 struct list_head *d;
Andrey Paninebad6a42005-09-06 15:18:29 -0700621
622 for(d = head->next; d != &dmi_devices; d = d->next) {
Jeff Garzik18552562007-10-03 15:15:40 -0400623 const struct dmi_device *dev =
624 list_entry(d, struct dmi_device, list);
Andrey Paninebad6a42005-09-06 15:18:29 -0700625
626 if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
627 ((name == NULL) || (strcmp(dev->name, name) == 0)))
628 return dev;
629 }
630
631 return NULL;
632}
633EXPORT_SYMBOL(dmi_find_device);
Andi Kleenf083a322006-03-25 16:30:19 +0100634
635/**
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900636 * dmi_get_date - parse a DMI date
637 * @field: data index (see enum dmi_field)
638 * @yearp: optional out parameter for the year
639 * @monthp: optional out parameter for the month
640 * @dayp: optional out parameter for the day
Andi Kleenf083a322006-03-25 16:30:19 +0100641 *
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900642 * The date field is assumed to be in the form resembling
643 * [mm[/dd]]/yy[yy] and the result is stored in the out
644 * parameters any or all of which can be omitted.
645 *
646 * If the field doesn't exist, all out parameters are set to zero
647 * and false is returned. Otherwise, true is returned with any
648 * invalid part of date set to zero.
649 *
650 * On return, year, month and day are guaranteed to be in the
651 * range of [0,9999], [0,12] and [0,31] respectively.
Andi Kleenf083a322006-03-25 16:30:19 +0100652 */
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900653bool dmi_get_date(int field, int *yearp, int *monthp, int *dayp)
Andi Kleenf083a322006-03-25 16:30:19 +0100654{
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900655 int year = 0, month = 0, day = 0;
656 bool exists;
657 const char *s, *y;
Tejun Heo02c24fa2009-08-16 21:01:22 +0900658 char *e;
Andi Kleenf083a322006-03-25 16:30:19 +0100659
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900660 s = dmi_get_system_info(field);
661 exists = s;
662 if (!exists)
663 goto out;
Andi Kleenf083a322006-03-25 16:30:19 +0100664
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900665 /*
666 * Determine year first. We assume the date string resembles
667 * mm/dd/yy[yy] but the original code extracted only the year
668 * from the end. Keep the behavior in the spirit of no
669 * surprises.
670 */
671 y = strrchr(s, '/');
672 if (!y)
673 goto out;
674
675 y++;
676 year = simple_strtoul(y, &e, 10);
677 if (y != e && year < 100) { /* 2-digit year */
Andi Kleenf083a322006-03-25 16:30:19 +0100678 year += 1900;
679 if (year < 1996) /* no dates < spec 1.0 */
680 year += 100;
681 }
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900682 if (year > 9999) /* year should fit in %04d */
683 year = 0;
Andi Kleenf083a322006-03-25 16:30:19 +0100684
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900685 /* parse the mm and dd */
686 month = simple_strtoul(s, &e, 10);
687 if (s == e || *e != '/' || !month || month > 12) {
688 month = 0;
689 goto out;
690 }
691
692 s = e + 1;
693 day = simple_strtoul(s, &e, 10);
694 if (s == y || s == e || *e != '/' || day > 31)
695 day = 0;
696out:
697 if (yearp)
698 *yearp = year;
699 if (monthp)
700 *monthp = month;
701 if (dayp)
702 *dayp = day;
703 return exists;
Andi Kleenf083a322006-03-25 16:30:19 +0100704}
Tejun Heo3e5cd1f2009-08-16 21:02:36 +0900705EXPORT_SYMBOL(dmi_get_date);
Jean Delvare7fce0842007-11-03 17:29:20 +0100706
707/**
708 * dmi_walk - Walk the DMI table and get called back for every record
709 * @decode: Callback function
Jean Delvaree7a19c562009-03-30 21:46:44 +0200710 * @private_data: Private data to be passed to the callback function
Jean Delvare7fce0842007-11-03 17:29:20 +0100711 *
712 * Returns -1 when the DMI table can't be reached, 0 on success.
713 */
Jean Delvaree7a19c562009-03-30 21:46:44 +0200714int dmi_walk(void (*decode)(const struct dmi_header *, void *),
715 void *private_data)
Jean Delvare7fce0842007-11-03 17:29:20 +0100716{
717 u8 *buf;
718
719 if (!dmi_available)
720 return -1;
721
722 buf = ioremap(dmi_base, dmi_len);
723 if (buf == NULL)
724 return -1;
725
Jean Delvaree7a19c562009-03-30 21:46:44 +0200726 dmi_table(buf, dmi_len, dmi_num, decode, private_data);
Jean Delvare7fce0842007-11-03 17:29:20 +0100727
728 iounmap(buf);
729 return 0;
730}
731EXPORT_SYMBOL_GPL(dmi_walk);
Jiri Slabyd61c72e2008-12-10 14:07:21 +0100732
733/**
734 * dmi_match - compare a string to the dmi field (if exists)
Randy Dunlapc2bacfc2009-01-06 14:41:40 -0800735 * @f: DMI field identifier
736 * @str: string to compare the DMI field to
Jiri Slabyd61c72e2008-12-10 14:07:21 +0100737 *
738 * Returns true if the requested field equals to the str (including NULL).
739 */
740bool dmi_match(enum dmi_field f, const char *str)
741{
742 const char *info = dmi_get_system_info(f);
743
744 if (info == NULL || str == NULL)
745 return info == str;
746
747 return !strcmp(info, str);
748}
749EXPORT_SYMBOL_GPL(dmi_match);