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 /* Only enable 64-bit entry point if it makes sense */ 36 #if __SIZEOF_POINTER__ > 4 37 #define HAS_SMBV3 1 38 #endif 39 40 /* 41 * Detect SMBIOS and export information about the SMBIOS into the 42 * environment. 43 * 44 * System Management BIOS Reference Specification, v2.6 Final 45 * http://www.dmtf.org/standards/published_documents/DSP0134_2.6.0.pdf 46 */ 47 48 /* 49 * 2.1.1 SMBIOS Structure Table Entry Point 50 * 51 * "On non-EFI systems, the SMBIOS Entry Point structure, described below, can 52 * be located by application software by searching for the anchor-string on 53 * paragraph (16-byte) boundaries within the physical memory address range 54 * 000F0000h to 000FFFFFh. This entry point encapsulates an intermediate anchor 55 * string that is used by some existing DMI browsers." 56 */ 57 #define SMBIOS_START 0xf0000 58 #define SMBIOS_LENGTH 0x10000 59 #define SMBIOS_STEP 0x10 60 #define SMBIOS_SIG "_SM_" 61 #define SMBIOS3_SIG "_SM3_" 62 #define SMBIOS_DMI_SIG "_DMI_" 63 64 #define SMBIOS_GET8(base, off) (*(uint8_t *)((base) + (off))) 65 #define SMBIOS_GET16(base, off) (*(uint16_t *)((base) + (off))) 66 #define SMBIOS_GET32(base, off) (*(uint32_t *)((base) + (off))) 67 #define SMBIOS_GET64(base, off) (*(uint64_t *)((base) + (off))) 68 69 #define SMBIOS_GETLEN(base) SMBIOS_GET8(base, 0x01) 70 #define SMBIOS_GETSTR(base) ((base) + SMBIOS_GETLEN(base)) 71 72 struct smbios_attr { 73 int probed; 74 caddr_t addr; 75 size_t length; 76 size_t count; 77 int major; 78 int minor; 79 int ver; 80 const char* bios_vendor; 81 const char* maker; 82 const char* product; 83 uint32_t enabled_memory; 84 uint32_t old_enabled_memory; 85 uint8_t enabled_sockets; 86 uint8_t populated_sockets; 87 }; 88 89 static struct smbios_attr smbios; 90 #ifdef HAS_SMBV3 91 static int isv3; 92 #endif 93 94 static uint8_t 95 smbios_checksum(const caddr_t addr, const uint8_t len) 96 { 97 uint8_t sum; 98 int i; 99 100 for (sum = 0, i = 0; i < len; i++) 101 sum += SMBIOS_GET8(addr, i); 102 return (sum); 103 } 104 105 static caddr_t 106 smbios_sigsearch(const caddr_t addr, const uint32_t len) 107 { 108 caddr_t cp; 109 110 /* Search on 16-byte boundaries. */ 111 for (cp = addr; cp < addr + len; cp += SMBIOS_STEP) { 112 /* v2.1, 32-bit Entry point */ 113 if (strncmp(cp, SMBIOS_SIG, sizeof(SMBIOS_SIG) - 1) == 0 && 114 smbios_checksum(cp, SMBIOS_GET8(cp, 0x05)) == 0 && 115 strncmp(cp + 0x10, SMBIOS_DMI_SIG, 5) == 0 && 116 smbios_checksum(cp + 0x10, 0x0f) == 0) 117 return (cp); 118 119 #ifdef HAS_SMBV3 120 /* v3.0, 64-bit Entry point */ 121 if (strncmp(cp, SMBIOS3_SIG, sizeof(SMBIOS3_SIG) - 1) == 0 && 122 smbios_checksum(cp, SMBIOS_GET8(cp, 0x06)) == 0) { 123 isv3 = 1; 124 return (cp); 125 } 126 #endif 127 } 128 return (NULL); 129 } 130 131 static const char* 132 smbios_getstring(caddr_t addr, const int offset) 133 { 134 caddr_t cp; 135 int i, idx; 136 137 idx = SMBIOS_GET8(addr, offset); 138 if (idx != 0) { 139 cp = SMBIOS_GETSTR(addr); 140 for (i = 1; i < idx; i++) 141 cp += strlen(cp) + 1; 142 return cp; 143 } 144 return (NULL); 145 } 146 147 static void 148 smbios_setenv(const char *name, caddr_t addr, const int offset) 149 { 150 const char* val; 151 152 val = smbios_getstring(addr, offset); 153 if (val != NULL) 154 setenv(name, val, 1); 155 } 156 157 #ifdef SMBIOS_SERIAL_NUMBERS 158 159 #define UUID_SIZE 16 160 #define UUID_TYPE uint32_t 161 #define UUID_STEP sizeof(UUID_TYPE) 162 #define UUID_ALL_BITS (UUID_SIZE / UUID_STEP) 163 #define UUID_GET(base, off) (*(UUID_TYPE *)((base) + (off))) 164 165 static void 166 smbios_setuuid(const char *name, const caddr_t addr, const int ver) 167 { 168 char uuid[37]; 169 int byteorder, i, ones, zeros; 170 UUID_TYPE n; 171 uint32_t f1; 172 uint16_t f2, f3; 173 174 for (i = 0, ones = 0, zeros = 0; i < UUID_SIZE; i += UUID_STEP) { 175 n = UUID_GET(addr, i) + 1; 176 if (zeros == 0 && n == 0) 177 ones++; 178 else if (ones == 0 && n == 1) 179 zeros++; 180 else 181 break; 182 } 183 184 if (ones != UUID_ALL_BITS && zeros != UUID_ALL_BITS) { 185 /* 186 * 3.3.2.1 System UUID 187 * 188 * "Although RFC 4122 recommends network byte order for all 189 * fields, the PC industry (including the ACPI, UEFI, and 190 * Microsoft specifications) has consistently used 191 * little-endian byte encoding for the first three fields: 192 * time_low, time_mid, time_hi_and_version. The same encoding, 193 * also known as wire format, should also be used for the 194 * SMBIOS representation of the UUID." 195 * 196 * Note: We use network byte order for backward compatibility 197 * unless SMBIOS version is 2.6+ or little-endian is forced. 198 */ 199 #if defined(SMBIOS_LITTLE_ENDIAN_UUID) 200 byteorder = LITTLE_ENDIAN; 201 #elif defined(SMBIOS_NETWORK_ENDIAN_UUID) 202 byteorder = BIG_ENDIAN; 203 #else 204 byteorder = ver < 0x0206 ? BIG_ENDIAN : LITTLE_ENDIAN; 205 #endif 206 if (byteorder != LITTLE_ENDIAN) { 207 f1 = ntohl(SMBIOS_GET32(addr, 0)); 208 f2 = ntohs(SMBIOS_GET16(addr, 4)); 209 f3 = ntohs(SMBIOS_GET16(addr, 6)); 210 } else { 211 f1 = le32toh(SMBIOS_GET32(addr, 0)); 212 f2 = le16toh(SMBIOS_GET16(addr, 4)); 213 f3 = le16toh(SMBIOS_GET16(addr, 6)); 214 } 215 sprintf(uuid, 216 "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", 217 f1, f2, f3, SMBIOS_GET8(addr, 8), SMBIOS_GET8(addr, 9), 218 SMBIOS_GET8(addr, 10), SMBIOS_GET8(addr, 11), 219 SMBIOS_GET8(addr, 12), SMBIOS_GET8(addr, 13), 220 SMBIOS_GET8(addr, 14), SMBIOS_GET8(addr, 15)); 221 setenv(name, uuid, 1); 222 } 223 } 224 225 #undef UUID_SIZE 226 #undef UUID_TYPE 227 #undef UUID_STEP 228 #undef UUID_ALL_BITS 229 #undef UUID_GET 230 231 #endif 232 233 static const char * 234 smbios_parse_chassis_type(caddr_t addr) 235 { 236 int type; 237 238 type = SMBIOS_GET8(addr, 0x5); 239 switch (type) { 240 case 0x1: 241 return ("Other"); 242 case 0x2: 243 return ("Unknown"); 244 case 0x3: 245 return ("Desktop"); 246 case 0x4: 247 return ("Low Profile Desktop"); 248 case 0x5: 249 return ("Pizza Box"); 250 case 0x6: 251 return ("Mini Tower"); 252 case 0x7: 253 return ("Tower"); 254 case 0x8: 255 return ("Portable"); 256 case 0x9: 257 return ("Laptop"); 258 case 0xA: 259 return ("Notebook"); 260 case 0xB: 261 return ("Hand Held"); 262 case 0xC: 263 return ("Docking Station"); 264 case 0xD: 265 return ("All in One"); 266 case 0xE: 267 return ("Sub Notebook"); 268 case 0xF: 269 return ("Lunch Box"); 270 case 0x10: 271 return ("Space-saving"); 272 case 0x11: 273 return ("Main Server Chassis"); 274 case 0x12: 275 return ("Expansion Chassis"); 276 case 0x13: 277 return ("SubChassis"); 278 case 0x14: 279 return ("Bus Expansion Chassis"); 280 case 0x15: 281 return ("Peripheral Chassis"); 282 case 0x16: 283 return ("RAID Chassis"); 284 case 0x17: 285 return ("Rack Mount Chassis"); 286 case 0x18: 287 return ("Sealed-case PC"); 288 case 0x19: 289 return ("Multi-system chassis"); 290 case 0x1A: 291 return ("Compact PCI"); 292 case 0x1B: 293 return ("Advanced TCA"); 294 case 0x1C: 295 return ("Blade"); 296 case 0x1D: 297 return ("Blade Enclosure"); 298 case 0x1E: 299 return ("Tablet"); 300 case 0x1F: 301 return ("Convertible"); 302 case 0x20: 303 return ("Detachable"); 304 case 0x21: 305 return ("IoT Gateway"); 306 case 0x22: 307 return ("Embedded PC"); 308 case 0x23: 309 return ("Mini PC"); 310 case 0x24: 311 return ("Stick PC"); 312 } 313 314 return ("Undefined"); 315 } 316 317 static caddr_t 318 smbios_parse_table(const caddr_t addr) 319 { 320 caddr_t cp; 321 int proc, size, osize, type; 322 uint8_t bios_minor, bios_major; 323 char buf[16]; 324 325 type = SMBIOS_GET8(addr, 0); /* 3.1.2 Structure Header Format */ 326 switch(type) { 327 case 0: /* 3.3.1 BIOS Information (Type 0) */ 328 smbios_setenv("smbios.bios.vendor", addr, 0x04); 329 smbios_setenv("smbios.bios.version", addr, 0x05); 330 smbios_setenv("smbios.bios.reldate", addr, 0x08); 331 bios_major = SMBIOS_GET8(addr, 0x14); 332 bios_minor = SMBIOS_GET8(addr, 0x15); 333 if (bios_minor != 0xFF && bios_major != 0xFF) { 334 snprintf(buf, sizeof(buf), "%u.%u", 335 bios_major, bios_minor); 336 setenv("smbios.bios.revision", buf, 1); 337 } 338 break; 339 340 case 1: /* 3.3.2 System Information (Type 1) */ 341 smbios_setenv("smbios.system.maker", addr, 0x04); 342 smbios_setenv("smbios.system.product", addr, 0x05); 343 smbios_setenv("smbios.system.version", addr, 0x06); 344 #ifdef SMBIOS_SERIAL_NUMBERS 345 smbios_setenv("smbios.system.serial", addr, 0x07); 346 smbios_setuuid("smbios.system.uuid", addr + 0x08, smbios.ver); 347 #endif 348 if (smbios.major > 2 || 349 (smbios.major == 2 && smbios.minor >= 4)) { 350 smbios_setenv("smbios.system.sku", addr, 0x19); 351 smbios_setenv("smbios.system.family", addr, 0x1a); 352 } 353 break; 354 355 case 2: /* 3.3.3 Base Board (or Module) Information (Type 2) */ 356 smbios_setenv("smbios.planar.maker", addr, 0x04); 357 smbios_setenv("smbios.planar.product", addr, 0x05); 358 smbios_setenv("smbios.planar.version", addr, 0x06); 359 #ifdef SMBIOS_SERIAL_NUMBERS 360 smbios_setenv("smbios.planar.serial", addr, 0x07); 361 smbios_setenv("smbios.planar.tag", addr, 0x08); 362 #endif 363 smbios_setenv("smbios.planar.location", addr, 0x0a); 364 break; 365 366 case 3: /* 3.3.4 System Enclosure or Chassis (Type 3) */ 367 smbios_setenv("smbios.chassis.maker", addr, 0x04); 368 setenv("smbios.chassis.type", smbios_parse_chassis_type(addr), 1); 369 smbios_setenv("smbios.chassis.version", addr, 0x06); 370 #ifdef SMBIOS_SERIAL_NUMBERS 371 smbios_setenv("smbios.chassis.serial", addr, 0x07); 372 smbios_setenv("smbios.chassis.tag", addr, 0x08); 373 #endif 374 break; 375 376 case 4: /* 3.3.5 Processor Information (Type 4) */ 377 /* 378 * Offset 18h: Processor Status 379 * 380 * Bit 7 Reserved, must be 0 381 * Bit 6 CPU Socket Populated 382 * 1 - CPU Socket Populated 383 * 0 - CPU Socket Unpopulated 384 * Bit 5:3 Reserved, must be zero 385 * Bit 2:0 CPU Status 386 * 0h - Unknown 387 * 1h - CPU Enabled 388 * 2h - CPU Disabled by User via BIOS Setup 389 * 3h - CPU Disabled by BIOS (POST Error) 390 * 4h - CPU is Idle, waiting to be enabled 391 * 5-6h - Reserved 392 * 7h - Other 393 */ 394 proc = SMBIOS_GET8(addr, 0x18); 395 if ((proc & 0x07) == 1) 396 smbios.enabled_sockets++; 397 if ((proc & 0x40) != 0) 398 smbios.populated_sockets++; 399 break; 400 401 case 6: /* 3.3.7 Memory Module Information (Type 6, Obsolete) */ 402 /* 403 * Offset 0Ah: Enabled Size 404 * 405 * Bit 7 Bank connection 406 * 1 - Double-bank connection 407 * 0 - Single-bank connection 408 * Bit 6:0 Size (n), where 2**n is the size in MB 409 * 7Dh - Not determinable (Installed Size only) 410 * 7Eh - Module is installed, but no memory 411 * has been enabled 412 * 7Fh - Not installed 413 */ 414 osize = SMBIOS_GET8(addr, 0x0a) & 0x7f; 415 if (osize > 0 && osize < 22) 416 smbios.old_enabled_memory += 1 << (osize + 10); 417 break; 418 419 case 17: /* 3.3.18 Memory Device (Type 17) */ 420 /* 421 * Offset 0Ch: Size 422 * 423 * Bit 15 Granularity 424 * 1 - Value is in kilobytes units 425 * 0 - Value is in megabytes units 426 * Bit 14:0 Size 427 */ 428 size = SMBIOS_GET16(addr, 0x0c); 429 if (size != 0 && size != 0xffff) 430 smbios.enabled_memory += (size & 0x8000) != 0 ? 431 (size & 0x7fff) : (size << 10); 432 break; 433 434 default: /* skip other types */ 435 break; 436 } 437 438 /* Find structure terminator. */ 439 cp = SMBIOS_GETSTR(addr); 440 while (SMBIOS_GET16(cp, 0) != 0) 441 cp++; 442 443 return (cp + 2); 444 } 445 446 static caddr_t 447 smbios_find_struct(int type) 448 { 449 caddr_t dmi; 450 size_t i; 451 452 if (smbios.addr == NULL) 453 return (NULL); 454 455 for (dmi = smbios.addr, i = 0; 456 dmi < smbios.addr + smbios.length && i < smbios.count; i++) { 457 if (SMBIOS_GET8(dmi, 0) == type) 458 return dmi; 459 /* Find structure terminator. */ 460 dmi = SMBIOS_GETSTR(dmi); 461 while (SMBIOS_GET16(dmi, 0) != 0) 462 dmi++; 463 dmi += 2; 464 } 465 466 return (NULL); 467 } 468 469 static void 470 smbios_probe(const caddr_t addr) 471 { 472 caddr_t saddr, info; 473 uintptr_t paddr; 474 int maj_off; 475 int min_off; 476 477 if (smbios.probed) 478 return; 479 smbios.probed = 1; 480 481 /* Search signatures and validate checksums. */ 482 saddr = smbios_sigsearch(addr ? addr : PTOV(SMBIOS_START), 483 SMBIOS_LENGTH); 484 if (saddr == NULL) 485 return; 486 487 #ifdef HAS_SMBV3 488 if (isv3) { 489 smbios.length = SMBIOS_GET32(saddr, 0x0c); /* Structure Table Length */ 490 paddr = SMBIOS_GET64(saddr, 0x10); /* Structure Table Address */ 491 smbios.count = -1; /* not present in V3 */ 492 smbios.ver = 0; /* not present in V3 */ 493 maj_off = 0x07; 494 min_off = 0x08; 495 } else 496 #endif 497 { 498 smbios.length = SMBIOS_GET16(saddr, 0x16); /* Structure Table Length */ 499 paddr = SMBIOS_GET32(saddr, 0x18); /* Structure Table Address */ 500 smbios.count = SMBIOS_GET16(saddr, 0x1c); /* No of SMBIOS Structures */ 501 smbios.ver = SMBIOS_GET8(saddr, 0x1e); /* SMBIOS BCD Revision */ 502 maj_off = 0x06; 503 min_off = 0x07; 504 } 505 506 507 if (smbios.ver != 0) { 508 smbios.major = smbios.ver >> 4; 509 smbios.minor = smbios.ver & 0x0f; 510 if (smbios.major > 9 || smbios.minor > 9) 511 smbios.ver = 0; 512 } 513 if (smbios.ver == 0) { 514 smbios.major = SMBIOS_GET8(saddr, maj_off);/* SMBIOS Major Version */ 515 smbios.minor = SMBIOS_GET8(saddr, min_off);/* SMBIOS Minor Version */ 516 } 517 smbios.ver = (smbios.major << 8) | smbios.minor; 518 smbios.addr = PTOV(paddr); 519 520 /* Get system information from SMBIOS */ 521 info = smbios_find_struct(0x00); 522 if (info != NULL) { 523 smbios.bios_vendor = smbios_getstring(info, 0x04); 524 } 525 info = smbios_find_struct(0x01); 526 if (info != NULL) { 527 smbios.maker = smbios_getstring(info, 0x04); 528 smbios.product = smbios_getstring(info, 0x05); 529 } 530 } 531 532 void 533 smbios_detect(const caddr_t addr) 534 { 535 char buf[16]; 536 caddr_t dmi; 537 size_t i; 538 539 smbios_probe(addr); 540 if (smbios.addr == NULL) 541 return; 542 543 for (dmi = smbios.addr, i = 0; 544 dmi < smbios.addr + smbios.length && i < smbios.count; i++) 545 dmi = smbios_parse_table(dmi); 546 547 sprintf(buf, "%d.%d", smbios.major, smbios.minor); 548 setenv("smbios.version", buf, 1); 549 if (smbios.enabled_memory > 0 || smbios.old_enabled_memory > 0) { 550 sprintf(buf, "%u", smbios.enabled_memory > 0 ? 551 smbios.enabled_memory : smbios.old_enabled_memory); 552 setenv("smbios.memory.enabled", buf, 1); 553 } 554 if (smbios.enabled_sockets > 0) { 555 sprintf(buf, "%u", smbios.enabled_sockets); 556 setenv("smbios.socket.enabled", buf, 1); 557 } 558 if (smbios.populated_sockets > 0) { 559 sprintf(buf, "%u", smbios.populated_sockets); 560 setenv("smbios.socket.populated", buf, 1); 561 } 562 } 563 564 static int 565 smbios_match_str(const char* s1, const char* s2) 566 { 567 return (s1 == NULL || (s2 != NULL && !strcmp(s1, s2))); 568 } 569 570 int 571 smbios_match(const char* bios_vendor, const char* maker, 572 const char* product) 573 { 574 /* XXXRP currently, only called from non-EFI. */ 575 smbios_probe(NULL); 576 return (smbios_match_str(bios_vendor, smbios.bios_vendor) && 577 smbios_match_str(maker, smbios.maker) && 578 smbios_match_str(product, smbios.product)); 579 } 580