1 #include <linux/types.h>
2 #include <linux/string.h>
3 #include <linux/init.h>
4 #include <linux/module.h>
6 #include <linux/bootmem.h>
9 static char * __init dmi_string(struct dmi_header *dm, u8 s)
11 u8 *bp = ((u8 *) dm) + dm->length;
16 while (s > 0 && *bp) {
22 str = alloc_bootmem(strlen(bp) + 1);
26 printk(KERN_ERR "dmi_string: out of memory.\n");
34 * We have to be cautious here. We have seen BIOSes with DMI pointers
35 * pointing to completely the wrong place for example
37 static int __init dmi_table(u32 base, int len, int num,
38 void (*decode)(struct dmi_header *))
43 buf = bt_ioremap(base, len);
50 * Stop when we see all the items the table claimed to have
51 * OR we run off the end of the table (also happens)
53 while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) {
54 struct dmi_header *dm = (struct dmi_header *)data;
56 * We want to know the total length (formated area and strings)
57 * before decoding to make sure we won't run off the table in
58 * dmi_decode or dmi_string
61 while ((data - buf < len - 1) && (data[0] || data[1]))
63 if (data - buf < len - 1)
72 static int __init dmi_checksum(u8 *buf)
77 for (a = 0; a < 15; a++)
83 static char *dmi_ident[DMI_STRING_MAX];
84 static LIST_HEAD(dmi_devices);
89 static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string)
91 char *p, *d = (char*) dm;
96 p = dmi_string(dm, d[string]);
103 static void __init dmi_save_devices(struct dmi_header *dm)
105 int i, count = (dm->length - sizeof(struct dmi_header)) / 2;
106 struct dmi_device *dev;
108 for (i = 0; i < count; i++) {
109 char *d = ((char *) dm) + (i * 2);
111 /* Skip disabled device */
112 if ((*d & 0x80) == 0)
115 dev = alloc_bootmem(sizeof(*dev));
117 printk(KERN_ERR "dmi_save_devices: out of memory.\n");
121 dev->type = *d++ & 0x7f;
122 dev->name = dmi_string(dm, *d);
123 dev->device_data = NULL;
125 list_add(&dev->list, &dmi_devices);
129 static void __init dmi_save_ipmi_device(struct dmi_header *dm)
131 struct dmi_device *dev;
134 data = alloc_bootmem(dm->length);
136 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
140 memcpy(data, dm, dm->length);
142 dev = alloc_bootmem(sizeof(*dev));
144 printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n");
148 dev->type = DMI_DEV_TYPE_IPMI;
149 dev->name = "IPMI controller";
150 dev->device_data = data;
152 list_add(&dev->list, &dmi_devices);
156 * Process a DMI table entry. Right now all we care about are the BIOS
157 * and machine entries. For 2.5 we should pull the smbus controller info
160 static void __init dmi_decode(struct dmi_header *dm)
163 case 0: /* BIOS Information */
164 dmi_save_ident(dm, DMI_BIOS_VENDOR, 4);
165 dmi_save_ident(dm, DMI_BIOS_VERSION, 5);
166 dmi_save_ident(dm, DMI_BIOS_DATE, 8);
168 case 1: /* System Information */
169 dmi_save_ident(dm, DMI_SYS_VENDOR, 4);
170 dmi_save_ident(dm, DMI_PRODUCT_NAME, 5);
171 dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6);
172 dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7);
174 case 2: /* Base Board Information */
175 dmi_save_ident(dm, DMI_BOARD_VENDOR, 4);
176 dmi_save_ident(dm, DMI_BOARD_NAME, 5);
177 dmi_save_ident(dm, DMI_BOARD_VERSION, 6);
179 case 10: /* Onboard Devices Information */
180 dmi_save_devices(dm);
182 case 38: /* IPMI Device Information */
183 dmi_save_ipmi_device(dm);
187 void __init dmi_scan_machine(void)
193 * no iounmap() for that ioremap(); it would be a no-op, but it's
194 * so early in setup that sucker gets confused into doing what
195 * it shouldn't if we actually call it.
197 p = ioremap(0xF0000, 0x10000);
201 for (q = p; q < p + 0x10000; q += 16) {
202 memcpy_fromio(buf, q, 15);
203 if ((memcmp(buf, "_DMI_", 5) == 0) && dmi_checksum(buf)) {
204 u16 num = (buf[13] << 8) | buf[12];
205 u16 len = (buf[7] << 8) | buf[6];
206 u32 base = (buf[11] << 24) | (buf[10] << 16) |
207 (buf[9] << 8) | buf[8];
210 * DMI version 0.0 means that the real version is taken from
211 * the SMBIOS version, which we don't know at this point.
214 printk(KERN_INFO "DMI %d.%d present.\n",
215 buf[14] >> 4, buf[14] & 0xF);
217 printk(KERN_INFO "DMI present.\n");
219 if (dmi_table(base,len, num, dmi_decode) == 0)
224 out: printk(KERN_INFO "DMI not present.\n");
229 * dmi_check_system - check system DMI data
230 * @list: array of dmi_system_id structures to match against
232 * Walk the blacklist table running matching functions until someone
233 * returns non zero or we hit the end. Callback function is called for
234 * each successfull match. Returns the number of matches.
236 int dmi_check_system(struct dmi_system_id *list)
239 struct dmi_system_id *d = list;
242 for (i = 0; i < ARRAY_SIZE(d->matches); i++) {
243 int s = d->matches[i].slot;
246 if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr))
252 if (d->callback && d->callback(d))
259 EXPORT_SYMBOL(dmi_check_system);
262 * dmi_get_system_info - return DMI data value
263 * @field: data index (see enum dmi_filed)
265 * Returns one DMI data value, can be used to perform
266 * complex DMI data checks.
268 char *dmi_get_system_info(int field)
270 return dmi_ident[field];
272 EXPORT_SYMBOL(dmi_get_system_info);
275 * dmi_find_device - find onboard device by type/name
276 * @type: device type or %DMI_DEV_TYPE_ANY to match all device types
277 * @desc: device name string or %NULL to match all
278 * @from: previous device found in search, or %NULL for new search.
280 * Iterates through the list of known onboard devices. If a device is
281 * found with a matching @vendor and @device, a pointer to its device
282 * structure is returned. Otherwise, %NULL is returned.
283 * A new search is initiated by passing %NULL to the @from argument.
284 * If @from is not %NULL, searches continue from next device.
286 struct dmi_device * dmi_find_device(int type, const char *name,
287 struct dmi_device *from)
289 struct list_head *d, *head = from ? &from->list : &dmi_devices;
291 for(d = head->next; d != &dmi_devices; d = d->next) {
292 struct dmi_device *dev = list_entry(d, struct dmi_device, list);
294 if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) &&
295 ((name == NULL) || (strcmp(dev->name, name) == 0)))
301 EXPORT_SYMBOL(dmi_find_device);