1 /*- 2 * Copyright (c) 2005-2009 Jung-uk Kim <jkim@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <stand.h> 31 #include <sys/endian.h> 32 33 #define PTOV(x) ptov(x) 34 35 /* 36 * Detect SMBIOS and export information about the SMBIOS into the 37 * environment. 38 * 39 * System Management BIOS Reference Specification, v2.6 Final 40 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf 41 */ 42 43 /* 44 * 2.1.1 SMBIOS Structure Table Entry Point 45 * 46 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can 47 * be located by application software by searching for the anchor-string on 48 * paragraph (16-byte) boundaries within the physical memory address range 49 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor 50 * string that is used by some existing DMI browsers." 51 */ 52 #define SMBIOS_START 0xf0000 53 #define SMBIOS_LENGTH 0x10000 54 #define SMBIOS_STEP 0x10 55 #define SMBIOS_SIG "_SM_" 56 #define SMBIOS_DMI_SIG "_DMI_" 57 58 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off))) 59 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off))) 60 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off))) 61 62 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) 63 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) 64 65 struct smbios_attr { 66 int probed; 67 caddr_t addr; 68 size_t length; 69 size_t count; 70 int major; 71 int minor; 72 int ver; 73 const char* bios_vendor; 74 const char* maker; 75 const char* product; 76 uint32_t enabled_memory; 77 uint32_t old_enabled_memory; 78 uint8_t enabled_sockets; 79 uint8_t populated_sockets; 80 }; 81 82 static struct smbios_attr smbios; 83 84 static uint8_t 85 smbios_checksum(const caddr_t addr, const uint8_t len) 86 { 87 uint8_t sum; 88 int i; 89 90 for (sum = 0, i = 0; i < len; i++) 91 sum += SMBIOS_GET8(addr, i); 92 return (sum); 93 } 94 95 static caddr_t 96 smbios_sigsearch(const caddr_t addr, const uint32_t len) 97 { 98 caddr_t cp; 99 100 /* Search on 16-byte boundaries. */ 101 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) 102 if (strncmp(cp, SMBIOS_SIG, 4) == 0 && 103 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && 104 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 && 105 smbios_checksum(cp + 0x10, 0x0f) == 0) 106 return (cp); 107 return (NULL); 108 } 109 110 static const char* 111 smbios_getstring(caddr_t addr, const int offset) 112 { 113 caddr_t cp; 114 int i, idx; 115 116 idx = SMBIOS_GET8(addr, offset); 117 if (idx != 0) { 118 cp = SMBIOS_GETSTR(addr); 119 for (i = 1; i < idx; i++) 120 cp += strlen(cp) + 1; 121 return cp; 122 } 123 return (NULL); 124 } 125 126 static void 127 smbios_setenv(const char *name, caddr_t addr, const int offset) 128 { 129 const char* val; 130 131 val = smbios_getstring(addr, offset); 132 if (val != NULL) 133 setenv(name, val, 1); 134 } 135 136 #ifdef SMBIOS_SERIAL_NUMBERS 137 138 #define UUID_SIZE 16 139 #define UUID_TYPE uint32_t 140 #define UUID_STEP sizeof(UUID_TYPE) 141 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) 142 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off))) 143 144 static void 145 smbios_setuuid(const char *name, const caddr_t addr, const int ver) 146 { 147 char uuid[37]; 148 int byteorder, i, ones, zeros; 149 UUID_TYPE n; 150 uint32_t f1; 151 uint16_t f2, f3; 152 153 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { 154 n = UUID_GET(addr, i) + 1; 155 if (zeros == 0 && n == 0) 156 ones++; 157 else if (ones == 0 && n == 1) 158 zeros++; 159 else 160 break; 161 } 162 163 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { 164 /* 165 * 3.3.2.1 System UUID 166 * 167 * "Although RFC 4122 recommends network byte order for all 168 * fields, the PC industry (including the ACPI, UEFI, and 169 * Microsoft specifications) has consistently used 170 * little-endian byte encoding for the first three fields: 171 * time_low, time_mid, time_hi_and_version. The same encoding, 172 * also known as wire format, should also be used for the 173 * SMBIOS representation of the UUID." 174 * 175 * Note: We use network byte order for backward compatibility 176 * unless SMBIOS version is 2.6+ or little-endian is forced. 177 */ 178 #if defined(SMBIOS_LITTLE_ENDIAN_UUID) 179 byteorder = LITTLE_ENDIAN; 180 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID) 181 byteorder = BIG_ENDIAN; 182 #else 183 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN; 184 #endif 185 if (byteorder != LITTLE_ENDIAN) { 186 f1 = ntohl(SMBIOS_GET32(addr, 0)); 187 f2 = ntohs(SMBIOS_GET16(addr, 4)); 188 f3 = ntohs(SMBIOS_GET16(addr, 6)); 189 } else { 190 f1 = le32toh(SMBIOS_GET32(addr, 0)); 191 f2 = le16toh(SMBIOS_GET16(addr, 4)); 192 f3 = le16toh(SMBIOS_GET16(addr, 6)); 193 } 194 sprintf(uuid, 195 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 196 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), 197 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), 198 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), 199 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); 200 setenv(name, uuid, 1); 201 } 202 } 203 204 #undef UUID_SIZE 205 #undef UUID_TYPE 206 #undef UUID_STEP 207 #undef UUID_ALL_BITS 208 #undef UUID_GET 209 210 #endif 211 212 static const char * 213 smbios_parse_chassis_type(caddr_t addr) 214 { 215 int type; 216 217 type = SMBIOS_GET8(addr, 0x5); 218 switch (type) { 219 case 0x1: 220 return ("Other"); 221 case 0x2: 222 return ("Unknown"); 223 case 0x3: 224 return ("Desktop"); 225 case 0x4: 226 return ("Low Profile Desktop"); 227 case 0x5: 228 return ("Pizza Box"); 229 case 0x6: 230 return ("Mini Tower"); 231 case 0x7: 232 return ("Tower"); 233 case 0x8: 234 return ("Portable"); 235 case 0x9: 236 return ("Laptop"); 237 case 0xA: 238 return ("Notebook"); 239 case 0xB: 240 return ("Hand Held"); 241 case 0xC: 242 return ("Docking Station"); 243 case 0xD: 244 return ("All in One"); 245 case 0xE: 246 return ("Sub Notebook"); 247 case 0xF: 248 return ("Lunch Box"); 249 case 0x10: 250 return ("Space-saving"); 251 case 0x11: 252 return ("Main Server Chassis"); 253 case 0x12: 254 return ("Expansion Chassis"); 255 case 0x13: 256 return ("SubChassis"); 257 case 0x14: 258 return ("Bus Expansion Chassis"); 259 case 0x15: 260 return ("Peripheral Chassis"); 261 case 0x16: 262 return ("RAID Chassis"); 263 case 0x17: 264 return ("Rack Mount Chassis"); 265 case 0x18: 266 return ("Sealed-case PC"); 267 case 0x19: 268 return ("Multi-system chassis"); 269 case 0x1A: 270 return ("Compact PCI"); 271 case 0x1B: 272 return ("Advanced TCA"); 273 case 0x1C: 274 return ("Blade"); 275 case 0x1D: 276 return ("Blade Enclosure"); 277 case 0x1E: 278 return ("Tablet"); 279 case 0x1F: 280 return ("Convertible"); 281 case 0x20: 282 return ("Detachable"); 283 case 0x21: 284 return ("IoT Gateway"); 285 case 0x22: 286 return ("Embedded PC"); 287 case 0x23: 288 return ("Mini PC"); 289 case 0x24: 290 return ("Stick PC"); 291 } 292 293 return ("Undefined"); 294 } 295 296 static caddr_t 297 smbios_parse_table(const caddr_t addr) 298 { 299 caddr_t cp; 300 int proc, size, osize, type; 301 uint8_t bios_minor, bios_major; 302 char buf[16]; 303 304 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ 305 switch(type) { 306 case 0: /* 3.3.1 BIOS Information (Type 0) */ 307 smbios_setenv("smbios.bios.vendor", addr, 0x04); 308 smbios_setenv("smbios.bios.version", addr, 0x05); 309 smbios_setenv("smbios.bios.reldate", addr, 0x08); 310 bios_major = SMBIOS_GET8(addr, 0x14); 311 bios_minor = SMBIOS_GET8(addr, 0x15); 312 if (bios_minor != 0xFF && bios_major != 0xFF) { 313 snprintf(buf, sizeof(buf), "%u.%u", 314 bios_major, bios_minor); 315 setenv("smbios.bios.revision", buf, 1); 316 } 317 break; 318 319 case 1: /* 3.3.2 System Information (Type 1) */ 320 smbios_setenv("smbios.system.maker", addr, 0x04); 321 smbios_setenv("smbios.system.product", addr, 0x05); 322 smbios_setenv("smbios.system.version", addr, 0x06); 323 #ifdef SMBIOS_SERIAL_NUMBERS 324 smbios_setenv("smbios.system.serial", addr, 0x07); 325 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver); 326 #endif 327 if (smbios.major > 2 || 328 (smbios.major == 2 && smbios.minor >= 4)) { 329 smbios_setenv("smbios.system.sku", addr, 0x19); 330 smbios_setenv("smbios.system.family", addr, 0x1a); 331 } 332 break; 333 334 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ 335 smbios_setenv("smbios.planar.maker", addr, 0x04); 336 smbios_setenv("smbios.planar.product", addr, 0x05); 337 smbios_setenv("smbios.planar.version", addr, 0x06); 338 #ifdef SMBIOS_SERIAL_NUMBERS 339 smbios_setenv("smbios.planar.serial", addr, 0x07); 340 smbios_setenv("smbios.planar.tag", addr, 0x08); 341 #endif 342 smbios_setenv("smbios.planar.location", addr, 0x0a); 343 break; 344 345 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ 346 smbios_setenv("smbios.chassis.maker", addr, 0x04); 347 setenv("smbios.chassis.type", smbios_parse_chassis_type(addr), 1); 348 smbios_setenv("smbios.chassis.version", addr, 0x06); 349 #ifdef SMBIOS_SERIAL_NUMBERS 350 smbios_setenv("smbios.chassis.serial", addr, 0x07); 351 smbios_setenv("smbios.chassis.tag", addr, 0x08); 352 #endif 353 break; 354 355 case 4: /* 3.3.5 Processor Information (Type 4) */ 356 /* 357 * Offset 18h: Processor Status 358 * 359 * Bit 7 Reserved, must be 0 360 * Bit 6 CPU Socket Populated 361 * 1 - CPU Socket Populated 362 * 0 - CPU Socket Unpopulated 363 * Bit 5:3 Reserved, must be zero 364 * Bit 2:0 CPU Status 365 * 0h - Unknown 366 * 1h - CPU Enabled 367 * 2h - CPU Disabled by User via BIOS Setup 368 * 3h - CPU Disabled by BIOS (POST Error) 369 * 4h - CPU is Idle, waiting to be enabled 370 * 5-6h - Reserved 371 * 7h - Other 372 */ 373 proc = SMBIOS_GET8(addr, 0x18); 374 if ((proc & 0x07) == 1) 375 smbios.enabled_sockets++; 376 if ((proc & 0x40) != 0) 377 smbios.populated_sockets++; 378 break; 379 380 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ 381 /* 382 * Offset 0Ah: Enabled Size 383 * 384 * Bit 7 Bank connection 385 * 1 - Double-bank connection 386 * 0 - Single-bank connection 387 * Bit 6:0 Size (n), where 2**n is the size in MB 388 * 7Dh - Not determinable (Installed Size only) 389 * 7Eh - Module is installed, but no memory 390 * has been enabled 391 * 7Fh - Not installed 392 */ 393 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; 394 if (osize > 0 && osize < 22) 395 smbios.old_enabled_memory += 1 << (osize + 10); 396 break; 397 398 case 17: /* 3.3.18 Memory Device (Type 17) */ 399 /* 400 * Offset 0Ch: Size 401 * 402 * Bit 15 Granularity 403 * 1 - Value is in kilobytes units 404 * 0 - Value is in megabytes units 405 * Bit 14:0 Size 406 */ 407 size = SMBIOS_GET16(addr, 0x0c); 408 if (size != 0 && size != 0xffff) 409 smbios.enabled_memory += (size & 0x8000) != 0 ? 410 (size & 0x7fff) : (size << 10); 411 break; 412 413 default: /* skip other types */ 414 break; 415 } 416 417 /* Find structure terminator. */ 418 cp = SMBIOS_GETSTR(addr); 419 while (SMBIOS_GET16(cp, 0) != 0) 420 cp++; 421 422 return (cp + 2); 423 } 424 425 static caddr_t 426 smbios_find_struct(int type) 427 { 428 caddr_t dmi; 429 size_t i; 430 431 if (smbios.addr == NULL) 432 return (NULL); 433 434 for (dmi = smbios.addr, i = 0; 435 dmi < smbios.addr + smbios.length && i < smbios.count; i++) { 436 if (SMBIOS_GET8(dmi, 0) == type) 437 return dmi; 438 /* Find structure terminator. */ 439 dmi = SMBIOS_GETSTR(dmi); 440 while (SMBIOS_GET16(dmi, 0) != 0) 441 dmi++; 442 dmi += 2; 443 } 444 445 return (NULL); 446 } 447 448 static void 449 smbios_probe(const caddr_t addr) 450 { 451 caddr_t saddr, info; 452 uintptr_t paddr; 453 454 if (smbios.probed) 455 return; 456 smbios.probed = 1; 457 458 /* Search signatures and validate checksums. */ 459 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START), 460 SMBIOS_LENGTH); 461 if (saddr == NULL) 462 return; 463 464 smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */ 465 paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */ 466 smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */ 467 smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */ 468 469 if (smbios.ver != 0) { 470 smbios.major = smbios.ver >> 4; 471 smbios.minor = smbios.ver & 0x0f; 472 if (smbios.major > 9 || smbios.minor > 9) 473 smbios.ver = 0; 474 } 475 if (smbios.ver == 0) { 476 smbios.major = SMBIOS_GET8(saddr, 0x06);/* SMBIOS Major Version */ 477 smbios.minor = SMBIOS_GET8(saddr, 0x07);/* SMBIOS Minor Version */ 478 } 479 smbios.ver = (smbios.major << 8) | smbios.minor; 480 smbios.addr = PTOV(paddr); 481 482 /* Get system information from SMBIOS */ 483 info = smbios_find_struct(0x00); 484 if (info != NULL) { 485 smbios.bios_vendor = smbios_getstring(info, 0x04); 486 } 487 info = smbios_find_struct(0x01); 488 if (info != NULL) { 489 smbios.maker = smbios_getstring(info, 0x04); 490 smbios.product = smbios_getstring(info, 0x05); 491 } 492 } 493 494 void 495 smbios_detect(const caddr_t addr) 496 { 497 char buf[16]; 498 caddr_t dmi; 499 size_t i; 500 501 smbios_probe(addr); 502 if (smbios.addr == NULL) 503 return; 504 505 for (dmi = smbios.addr, i = 0; 506 dmi < smbios.addr + smbios.length && i < smbios.count; i++) 507 dmi = smbios_parse_table(dmi); 508 509 sprintf(buf, "%d.%d", smbios.major, smbios.minor); 510 setenv("smbios.version", buf, 1); 511 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) { 512 sprintf(buf, "%u", smbios.enabled_memory > 0 ? 513 smbios.enabled_memory : smbios.old_enabled_memory); 514 setenv("smbios.memory.enabled", buf, 1); 515 } 516 if (smbios.enabled_sockets > 0) { 517 sprintf(buf, "%u", smbios.enabled_sockets); 518 setenv("smbios.socket.enabled", buf, 1); 519 } 520 if (smbios.populated_sockets > 0) { 521 sprintf(buf, "%u", smbios.populated_sockets); 522 setenv("smbios.socket.populated", buf, 1); 523 } 524 } 525 526 static int 527 smbios_match_str(const char* s1, const char* s2) 528 { 529 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2))); 530 } 531 532 int 533 smbios_match(const char* bios_vendor, const char* maker, 534 const char* product) 535 { 536 /* XXXRP currently, only called from non-EFI. */ 537 smbios_probe(NULL); 538 return (smbios_match_str(bios_vendor, smbios.bios_vendor) && 539 smbios_match_str(maker, smbios.maker) && 540 smbios_match_str(product, smbios.product)); 541 } 542