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Commit | Line | Data |
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1da177e4 | 1 | #include <linux/types.h> |
1da177e4 LT |
2 | #include <linux/string.h> |
3 | #include <linux/init.h> | |
4 | #include <linux/module.h> | |
1da177e4 LT |
5 | #include <linux/dmi.h> |
6 | #include <linux/bootmem.h> | |
e9928674 | 7 | #include <linux/slab.h> |
1da177e4 | 8 | |
1da177e4 LT |
9 | static char * __init dmi_string(struct dmi_header *dm, u8 s) |
10 | { | |
1249c513 | 11 | u8 *bp = ((u8 *) dm) + dm->length; |
c3c7120d | 12 | char *str = ""; |
1249c513 | 13 | |
c3c7120d | 14 | if (s) { |
1da177e4 | 15 | s--; |
c3c7120d AP |
16 | while (s > 0 && *bp) { |
17 | bp += strlen(bp) + 1; | |
18 | s--; | |
19 | } | |
20 | ||
21 | if (*bp != 0) { | |
e9928674 | 22 | str = dmi_alloc(strlen(bp) + 1); |
c3c7120d AP |
23 | if (str != NULL) |
24 | strcpy(str, bp); | |
25 | else | |
26 | printk(KERN_ERR "dmi_string: out of memory.\n"); | |
27 | } | |
28 | } | |
29 | ||
30 | return str; | |
1da177e4 LT |
31 | } |
32 | ||
33 | /* | |
34 | * We have to be cautious here. We have seen BIOSes with DMI pointers | |
35 | * pointing to completely the wrong place for example | |
36 | */ | |
1249c513 AP |
37 | static int __init dmi_table(u32 base, int len, int num, |
38 | void (*decode)(struct dmi_header *)) | |
1da177e4 | 39 | { |
1249c513 AP |
40 | u8 *buf, *data; |
41 | int i = 0; | |
1da177e4 | 42 | |
e9928674 | 43 | buf = dmi_ioremap(base, len); |
1249c513 | 44 | if (buf == NULL) |
1da177e4 LT |
45 | return -1; |
46 | ||
47 | data = buf; | |
48 | ||
49 | /* | |
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) | |
52 | */ | |
1249c513 AP |
53 | while ((i < num) && (data - buf + sizeof(struct dmi_header)) <= len) { |
54 | struct dmi_header *dm = (struct dmi_header *)data; | |
1da177e4 LT |
55 | /* |
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 | |
59 | */ | |
1249c513 AP |
60 | data += dm->length; |
61 | while ((data - buf < len - 1) && (data[0] || data[1])) | |
1da177e4 | 62 | data++; |
1249c513 | 63 | if (data - buf < len - 1) |
1da177e4 | 64 | decode(dm); |
1249c513 | 65 | data += 2; |
1da177e4 LT |
66 | i++; |
67 | } | |
e9928674 | 68 | dmi_iounmap(buf, len); |
1da177e4 LT |
69 | return 0; |
70 | } | |
71 | ||
1249c513 | 72 | static int __init dmi_checksum(u8 *buf) |
1da177e4 | 73 | { |
1249c513 | 74 | u8 sum = 0; |
1da177e4 LT |
75 | int a; |
76 | ||
1249c513 AP |
77 | for (a = 0; a < 15; a++) |
78 | sum += buf[a]; | |
79 | ||
80 | return sum == 0; | |
1da177e4 LT |
81 | } |
82 | ||
1da177e4 | 83 | static char *dmi_ident[DMI_STRING_MAX]; |
ebad6a42 | 84 | static LIST_HEAD(dmi_devices); |
1da177e4 LT |
85 | |
86 | /* | |
87 | * Save a DMI string | |
88 | */ | |
1da177e4 LT |
89 | static void __init dmi_save_ident(struct dmi_header *dm, int slot, int string) |
90 | { | |
c3c7120d | 91 | char *p, *d = (char*) dm; |
1249c513 | 92 | |
1da177e4 LT |
93 | if (dmi_ident[slot]) |
94 | return; | |
1249c513 | 95 | |
c3c7120d AP |
96 | p = dmi_string(dm, d[string]); |
97 | if (p == NULL) | |
98 | return; | |
99 | ||
100 | dmi_ident[slot] = p; | |
1da177e4 LT |
101 | } |
102 | ||
ebad6a42 AP |
103 | static void __init dmi_save_devices(struct dmi_header *dm) |
104 | { | |
105 | int i, count = (dm->length - sizeof(struct dmi_header)) / 2; | |
106 | struct dmi_device *dev; | |
107 | ||
108 | for (i = 0; i < count; i++) { | |
109 | char *d = ((char *) dm) + (i * 2); | |
110 | ||
111 | /* Skip disabled device */ | |
112 | if ((*d & 0x80) == 0) | |
113 | continue; | |
114 | ||
e9928674 | 115 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
116 | if (!dev) { |
117 | printk(KERN_ERR "dmi_save_devices: out of memory.\n"); | |
118 | break; | |
119 | } | |
120 | ||
121 | dev->type = *d++ & 0x7f; | |
122 | dev->name = dmi_string(dm, *d); | |
123 | dev->device_data = NULL; | |
124 | ||
125 | list_add(&dev->list, &dmi_devices); | |
126 | } | |
127 | } | |
128 | ||
129 | static void __init dmi_save_ipmi_device(struct dmi_header *dm) | |
130 | { | |
131 | struct dmi_device *dev; | |
132 | void * data; | |
133 | ||
e9928674 | 134 | data = dmi_alloc(dm->length); |
ebad6a42 AP |
135 | if (data == NULL) { |
136 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
137 | return; | |
138 | } | |
139 | ||
140 | memcpy(data, dm, dm->length); | |
141 | ||
e9928674 | 142 | dev = dmi_alloc(sizeof(*dev)); |
ebad6a42 AP |
143 | if (!dev) { |
144 | printk(KERN_ERR "dmi_save_ipmi_device: out of memory.\n"); | |
145 | return; | |
146 | } | |
147 | ||
148 | dev->type = DMI_DEV_TYPE_IPMI; | |
149 | dev->name = "IPMI controller"; | |
150 | dev->device_data = data; | |
151 | ||
152 | list_add(&dev->list, &dmi_devices); | |
153 | } | |
154 | ||
1da177e4 LT |
155 | /* |
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 | |
158 | * out of here. | |
159 | */ | |
1da177e4 LT |
160 | static void __init dmi_decode(struct dmi_header *dm) |
161 | { | |
1249c513 | 162 | switch(dm->type) { |
ebad6a42 | 163 | case 0: /* BIOS Information */ |
1249c513 | 164 | dmi_save_ident(dm, DMI_BIOS_VENDOR, 4); |
1249c513 | 165 | dmi_save_ident(dm, DMI_BIOS_VERSION, 5); |
1249c513 AP |
166 | dmi_save_ident(dm, DMI_BIOS_DATE, 8); |
167 | break; | |
ebad6a42 | 168 | case 1: /* System Information */ |
1249c513 | 169 | dmi_save_ident(dm, DMI_SYS_VENDOR, 4); |
1249c513 | 170 | dmi_save_ident(dm, DMI_PRODUCT_NAME, 5); |
1249c513 | 171 | dmi_save_ident(dm, DMI_PRODUCT_VERSION, 6); |
1249c513 AP |
172 | dmi_save_ident(dm, DMI_PRODUCT_SERIAL, 7); |
173 | break; | |
ebad6a42 | 174 | case 2: /* Base Board Information */ |
1249c513 | 175 | dmi_save_ident(dm, DMI_BOARD_VENDOR, 4); |
1249c513 | 176 | dmi_save_ident(dm, DMI_BOARD_NAME, 5); |
1249c513 AP |
177 | dmi_save_ident(dm, DMI_BOARD_VERSION, 6); |
178 | break; | |
ebad6a42 AP |
179 | case 10: /* Onboard Devices Information */ |
180 | dmi_save_devices(dm); | |
181 | break; | |
182 | case 38: /* IPMI Device Information */ | |
183 | dmi_save_ipmi_device(dm); | |
1da177e4 LT |
184 | } |
185 | } | |
186 | ||
187 | void __init dmi_scan_machine(void) | |
188 | { | |
61e032fa AP |
189 | u8 buf[15]; |
190 | char __iomem *p, *q; | |
191 | ||
192 | /* | |
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. | |
196 | */ | |
197 | p = ioremap(0xF0000, 0x10000); | |
198 | if (p == NULL) | |
199 | goto out; | |
200 | ||
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]; | |
208 | ||
209 | /* | |
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. | |
212 | */ | |
213 | if (buf[14] != 0) | |
214 | printk(KERN_INFO "DMI %d.%d present.\n", | |
215 | buf[14] >> 4, buf[14] & 0xF); | |
216 | else | |
217 | printk(KERN_INFO "DMI present.\n"); | |
218 | ||
61e032fa AP |
219 | if (dmi_table(base,len, num, dmi_decode) == 0) |
220 | return; | |
221 | } | |
222 | } | |
223 | ||
e9928674 | 224 | out: printk(KERN_INFO "DMI not present or invalid.\n"); |
1da177e4 LT |
225 | } |
226 | ||
227 | ||
228 | /** | |
229 | * dmi_check_system - check system DMI data | |
230 | * @list: array of dmi_system_id structures to match against | |
231 | * | |
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. | |
235 | */ | |
236 | int dmi_check_system(struct dmi_system_id *list) | |
237 | { | |
238 | int i, count = 0; | |
239 | struct dmi_system_id *d = list; | |
240 | ||
241 | while (d->ident) { | |
242 | for (i = 0; i < ARRAY_SIZE(d->matches); i++) { | |
243 | int s = d->matches[i].slot; | |
244 | if (s == DMI_NONE) | |
245 | continue; | |
246 | if (dmi_ident[s] && strstr(dmi_ident[s], d->matches[i].substr)) | |
247 | continue; | |
248 | /* No match */ | |
249 | goto fail; | |
250 | } | |
640e8033 | 251 | count++; |
1da177e4 LT |
252 | if (d->callback && d->callback(d)) |
253 | break; | |
1da177e4 LT |
254 | fail: d++; |
255 | } | |
256 | ||
257 | return count; | |
258 | } | |
1da177e4 LT |
259 | EXPORT_SYMBOL(dmi_check_system); |
260 | ||
261 | /** | |
262 | * dmi_get_system_info - return DMI data value | |
263 | * @field: data index (see enum dmi_filed) | |
264 | * | |
265 | * Returns one DMI data value, can be used to perform | |
266 | * complex DMI data checks. | |
267 | */ | |
e70c9d5e | 268 | char *dmi_get_system_info(int field) |
1da177e4 LT |
269 | { |
270 | return dmi_ident[field]; | |
271 | } | |
e70c9d5e | 272 | EXPORT_SYMBOL(dmi_get_system_info); |
ebad6a42 AP |
273 | |
274 | /** | |
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. | |
279 | * | |
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. | |
285 | */ | |
286 | struct dmi_device * dmi_find_device(int type, const char *name, | |
287 | struct dmi_device *from) | |
288 | { | |
289 | struct list_head *d, *head = from ? &from->list : &dmi_devices; | |
290 | ||
291 | for(d = head->next; d != &dmi_devices; d = d->next) { | |
292 | struct dmi_device *dev = list_entry(d, struct dmi_device, list); | |
293 | ||
294 | if (((type == DMI_DEV_TYPE_ANY) || (dev->type == type)) && | |
295 | ((name == NULL) || (strcmp(dev->name, name) == 0))) | |
296 | return dev; | |
297 | } | |
298 | ||
299 | return NULL; | |
300 | } | |
301 | EXPORT_SYMBOL(dmi_find_device); |