pciconf.c revision 133268
1/* 2 * Copyright 1996 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#ifndef lint 31static const char rcsid[] = 32 "$FreeBSD: head/usr.sbin/pciconf/pciconf.c 133268 2004-08-07 14:37:49Z le $"; 33#endif /* not lint */ 34 35#include <sys/types.h> 36#include <sys/fcntl.h> 37 38#include <err.h> 39#include <stdlib.h> 40#include <stdio.h> 41#include <string.h> 42#include <unistd.h> 43#include <sys/pciio.h> 44#include <sys/queue.h> 45 46#include <dev/pci/pcireg.h> 47 48#include "pathnames.h" 49 50struct pci_device_info 51{ 52 TAILQ_ENTRY(pci_device_info) link; 53 int id; 54 char *desc; 55}; 56 57struct pci_vendor_info 58{ 59 TAILQ_ENTRY(pci_vendor_info) link; 60 TAILQ_HEAD(,pci_device_info) devs; 61 int id; 62 char *desc; 63}; 64 65TAILQ_HEAD(,pci_vendor_info) pci_vendors; 66 67static void dobar(const char *); 68static void list_devs(int vendors); 69static void list_verbose(struct pci_conf *p); 70static char *guess_class(struct pci_conf *p); 71static char *guess_subclass(struct pci_conf *p); 72static int load_vendors(void); 73static void readit(const char *, const char *, int); 74static void writeit(const char *, const char *, const char *, int); 75static void chkattached(const char *, int); 76 77static int exitstatus = 0; 78 79static void 80usage() 81{ 82 fprintf(stderr, "%s\n%s\n%s\n%s\n", 83 "usage: pciconf -l [-v]", 84 " pciconf -a selector", 85 " pciconf -r [-b | -h] selector addr[:addr2]", 86 " pciconf -w [-b | -h] selector addr value"); 87 exit (1); 88} 89 90int 91main(int argc, char **argv) 92{ 93 int c; 94 int listmode, readmode, writemode, attachedmode, barmode, verbose; 95 int byte, isshort; 96 97 barmode = listmode = readmode = writemode = attachedmode = verbose = byte = isshort = 0; 98 99 while ((c = getopt(argc, argv, "aBbhlrwv")) != -1) { 100 switch(c) { 101 case 'a': 102 attachedmode = 1; 103 break; 104 105 case 'B': 106 barmode = 1; 107 break; 108 109 case 'b': 110 byte = 1; 111 break; 112 113 case 'h': 114 isshort = 1; 115 break; 116 117 case 'l': 118 listmode = 1; 119 break; 120 121 case 'r': 122 readmode = 1; 123 break; 124 125 case 'w': 126 writemode = 1; 127 break; 128 129 case 'v': 130 verbose = 1; 131 break; 132 133 default: 134 usage(); 135 } 136 } 137 138 if ((listmode && optind != argc) 139 || (writemode && optind + 3 != argc) 140 || (readmode && optind + 2 != argc) 141 || (attachedmode && optind + 1 != argc) 142 || (barmode && optind + 1 != argc)) 143 usage(); 144 145 if (listmode) { 146 list_devs(verbose); 147 } else if (attachedmode) { 148 chkattached(argv[optind], 149 byte ? 1 : isshort ? 2 : 4); 150 } else if (readmode) { 151 readit(argv[optind], argv[optind + 1], 152 byte ? 1 : isshort ? 2 : 4); 153 } else if (writemode) { 154 writeit(argv[optind], argv[optind + 1], argv[optind + 2], 155 byte ? 1 : isshort ? 2 : 4); 156 } else if (barmode) { 157 } else { 158 usage(); 159 } 160 161 return exitstatus; 162} 163 164static void 165list_devs(int verbose) 166{ 167 int fd; 168 struct pci_conf_io pc; 169 struct pci_conf conf[255], *p; 170 int none_count = 0; 171 172 if (verbose) 173 load_vendors(); 174 175 fd = open(_PATH_DEVPCI, O_RDONLY, 0); 176 if (fd < 0) 177 err(1, "%s", _PATH_DEVPCI); 178 179 bzero(&pc, sizeof(struct pci_conf_io)); 180 pc.match_buf_len = sizeof(conf); 181 pc.matches = conf; 182 183 do { 184 if (ioctl(fd, PCIOCGETCONF, &pc) == -1) 185 err(1, "ioctl(PCIOCGETCONF)"); 186 187 /* 188 * 255 entries should be more than enough for most people, 189 * but if someone has more devices, and then changes things 190 * around between ioctls, we'll do the cheezy thing and 191 * just bail. The alternative would be to go back to the 192 * beginning of the list, and print things twice, which may 193 * not be desireable. 194 */ 195 if (pc.status == PCI_GETCONF_LIST_CHANGED) { 196 warnx("PCI device list changed, please try again"); 197 exitstatus = 1; 198 close(fd); 199 return; 200 } else if (pc.status == PCI_GETCONF_ERROR) { 201 warnx("error returned from PCIOCGETCONF ioctl"); 202 exitstatus = 1; 203 close(fd); 204 return; 205 } 206 for (p = conf; p < &conf[pc.num_matches]; p++) { 207 208 printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08x " 209 "chip=0x%08x rev=0x%02x hdr=0x%02x\n", 210 (p->pd_name && *p->pd_name) ? p->pd_name : 211 "none", 212 (p->pd_name && *p->pd_name) ? (int)p->pd_unit : 213 none_count++, 214 p->pc_sel.pc_bus, p->pc_sel.pc_dev, 215 p->pc_sel.pc_func, (p->pc_class << 16) | 216 (p->pc_subclass << 8) | p->pc_progif, 217 (p->pc_subdevice << 16) | p->pc_subvendor, 218 (p->pc_device << 16) | p->pc_vendor, 219 p->pc_revid, p->pc_hdr); 220 if (verbose) 221 list_verbose(p); 222 } 223 } while (pc.status == PCI_GETCONF_MORE_DEVS); 224 225 close(fd); 226} 227 228static void 229list_verbose(struct pci_conf *p) 230{ 231 struct pci_vendor_info *vi; 232 struct pci_device_info *di; 233 char *dp; 234 235 TAILQ_FOREACH(vi, &pci_vendors, link) { 236 if (vi->id == p->pc_vendor) { 237 printf(" vendor = '%s'\n", vi->desc); 238 break; 239 } 240 } 241 if (vi == NULL) { 242 di = NULL; 243 } else { 244 TAILQ_FOREACH(di, &vi->devs, link) { 245 if (di->id == p->pc_device) { 246 printf(" device = '%s'\n", di->desc); 247 break; 248 } 249 } 250 } 251 if ((dp = guess_class(p)) != NULL) 252 printf(" class = %s\n", dp); 253 if ((dp = guess_subclass(p)) != NULL) 254 printf(" subclass = %s\n", dp); 255} 256 257/* 258 * This is a direct cut-and-paste from the table in sys/dev/pci/pci.c. 259 */ 260static struct 261{ 262 int class; 263 int subclass; 264 char *desc; 265} pci_nomatch_tab[] = { 266 {PCIC_OLD, -1, "old"}, 267 {PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"}, 268 {PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"}, 269 {PCIC_STORAGE, -1, "mass storage"}, 270 {PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"}, 271 {PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"}, 272 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"}, 273 {PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"}, 274 {PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"}, 275 {PCIC_NETWORK, -1, "network"}, 276 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"}, 277 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"}, 278 {PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"}, 279 {PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"}, 280 {PCIC_DISPLAY, -1, "display"}, 281 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"}, 282 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"}, 283 {PCIC_MULTIMEDIA, -1, "multimedia"}, 284 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"}, 285 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"}, 286 {PCIC_MEMORY, -1, "memory"}, 287 {PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"}, 288 {PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"}, 289 {PCIC_BRIDGE, -1, "bridge"}, 290 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"}, 291 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"}, 292 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"}, 293 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"}, 294 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"}, 295 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"}, 296 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"}, 297 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"}, 298 {PCIC_BRIDGE, PCIS_BRIDGE_OTHER, "PCI-unknown"}, 299 {PCIC_SIMPLECOMM, -1, "simple comms"}, 300 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */ 301 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"}, 302 {PCIC_BASEPERIPH, -1, "base peripheral"}, 303 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"}, 304 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"}, 305 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"}, 306 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"}, 307 {PCIC_INPUTDEV, -1, "input device"}, 308 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"}, 309 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"}, 310 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"}, 311 {PCIC_DOCKING, -1, "docking station"}, 312 {PCIC_PROCESSOR, -1, "processor"}, 313 {PCIC_SERIALBUS, -1, "serial bus"}, 314 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"}, 315 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"}, 316 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"}, 317 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"}, 318 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"}, 319 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"}, 320 {0, 0, NULL} 321}; 322 323static char * 324guess_class(struct pci_conf *p) 325{ 326 int i; 327 328 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 329 if (pci_nomatch_tab[i].class == p->pc_class) 330 return(pci_nomatch_tab[i].desc); 331 } 332 return(NULL); 333} 334 335static char * 336guess_subclass(struct pci_conf *p) 337{ 338 int i; 339 340 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 341 if ((pci_nomatch_tab[i].class == p->pc_class) && 342 (pci_nomatch_tab[i].subclass == p->pc_subclass)) 343 return(pci_nomatch_tab[i].desc); 344 } 345 return(NULL); 346} 347 348static int 349load_vendors(void) 350{ 351 char *dbf; 352 FILE *db; 353 struct pci_vendor_info *cv; 354 struct pci_device_info *cd; 355 char buf[100], str[100]; 356 int id, error; 357 358 /* 359 * Locate the database and initialise. 360 */ 361 TAILQ_INIT(&pci_vendors); 362 if ((dbf = getenv("PCICONF_VENDOR_DATABASE")) == NULL) 363 dbf = _PATH_PCIVDB; 364 if ((db = fopen(dbf, "r")) == NULL) 365 return(1); 366 cv = NULL; 367 cd = NULL; 368 error = 0; 369 370 /* 371 * Scan input lines from the database 372 */ 373 for (;;) { 374 if (fgets(buf, sizeof(buf), db) == NULL) 375 break; 376 377 /* Check for vendor entry */ 378 if ((buf[0] != '\t') && (sscanf(buf, "%04x\t%[^\n]", &id, str) == 2)) { 379 if ((id == 0) || (strlen(str) < 1)) 380 continue; 381 if ((cv = malloc(sizeof(struct pci_vendor_info))) == NULL) { 382 warn("allocating vendor entry"); 383 error = 1; 384 break; 385 } 386 if ((cv->desc = strdup(str)) == NULL) { 387 free(cv); 388 warn("allocating vendor description"); 389 error = 1; 390 break; 391 } 392 cv->id = id; 393 TAILQ_INIT(&cv->devs); 394 TAILQ_INSERT_TAIL(&pci_vendors, cv, link); 395 continue; 396 } 397 398 /* Check for device entry */ 399 if ((buf[0] == '\t') && (sscanf(buf + 1, "%04x\t%[^\n]", &id, str) == 2)) { 400 if ((id == 0) || (strlen(str) < 1)) 401 continue; 402 if (cv == NULL) { 403 warnx("device entry with no vendor!"); 404 continue; 405 } 406 if ((cd = malloc(sizeof(struct pci_device_info))) == NULL) { 407 warn("allocating device entry"); 408 error = 1; 409 break; 410 } 411 if ((cd->desc = strdup(str)) == NULL) { 412 free(cd); 413 warn("allocating device description"); 414 error = 1; 415 break; 416 } 417 cd->id = id; 418 TAILQ_INSERT_TAIL(&cv->devs, cd, link); 419 continue; 420 } 421 422 /* It's a comment or junk, ignore it */ 423 } 424 if (ferror(db)) 425 error = 1; 426 fclose(db); 427 428 return(error); 429} 430 431 432static struct pcisel 433getsel(const char *str) 434{ 435 char *ep = strchr(str, '@'); 436 char *epbase; 437 struct pcisel sel; 438 439 if (ep == NULL) 440 ep = (char *)str; 441 else 442 ep++; 443 444 epbase = ep; 445 446 if (strncmp(ep, "pci", 3) == 0) { 447 ep += 3; 448 sel.pc_bus = strtoul(ep, &ep, 0); 449 if (!ep || *ep++ != ':') 450 errx(1, "cannot parse selector %s", str); 451 sel.pc_dev = strtoul(ep, &ep, 0); 452 if (!ep || *ep != ':') { 453 sel.pc_func = 0; 454 } else { 455 ep++; 456 sel.pc_func = strtoul(ep, &ep, 0); 457 } 458 if (*ep == ':') 459 ep++; 460 } 461 if (*ep != '\x0' || ep == epbase) 462 errx(1, "cannot parse selector %s", str); 463 return sel; 464} 465 466static void 467readone(int fd, struct pcisel *sel, long reg, int width) 468{ 469 struct pci_io pi; 470 471 pi.pi_sel = *sel; 472 pi.pi_reg = reg; 473 pi.pi_width = width; 474 475 if (ioctl(fd, PCIOCREAD, &pi) < 0) 476 err(1, "ioctl(PCIOCREAD)"); 477 478 printf("%0*x", width*2, pi.pi_data); 479} 480 481static void 482dobar(const char *name) 483{ 484#define NBAR 6 485 long rstart = 0x10; 486 long rend = 0x24; 487 long r; 488 char *end; 489 int i; 490 int fd; 491 uint32_t bars[NBAR]; 492 struct pcisel sel; 493 struct pci_io pi; 494 495 496 fd = open(_PATH_DEVPCI, O_RDWR, 0); 497 if (fd < 0) 498 err(1, "%s", _PATH_DEVPCI); 499 500 /* 501 * Read in the bars 502 */ 503 sel = getsel(name); 504 for (i = 0, r = rstart; r <= rend; i++, r += 4) { 505 pi.pi_sel = sel; 506 pi.pi_reg = r; 507 pi.pi_width = 4; 508 if (ioctl(fd, PCIOCREAD, &pi) < 0) 509 err(1, "ioctl(PCIOCREAD)"); 510 bars[i++] = pi.pi_data; 511 } 512 513 /* 514 * Print the bars 515 */ 516 for (i = 0; i < NBAR; i++) { 517 if (bars[i] == 0) 518 continue; 519 if (bars[i] & 1) { 520 /* I/O bar */ 521 } else { 522 /* Memory bar */ 523 } 524 } 525 526 close(fd); 527} 528 529static void 530readit(const char *name, const char *reg, int width) 531{ 532 long rstart; 533 long rend; 534 long r; 535 char *end; 536 int i; 537 int fd; 538 struct pcisel sel; 539 540 fd = open(_PATH_DEVPCI, O_RDWR, 0); 541 if (fd < 0) 542 err(1, "%s", _PATH_DEVPCI); 543 544 rend = rstart = strtol(reg, &end, 0); 545 if (end && *end == ':') { 546 end++; 547 rend = strtol(end, (char **) 0, 0); 548 } 549 sel = getsel(name); 550 for (i = 1, r = rstart; r <= rend; i++, r += width) { 551 readone(fd, &sel, r, width); 552 if (i && !(i % 8)) putchar(' '); 553 putchar(i % (16/width) ? ' ' : '\n'); 554 } 555 if (i % (16/width) != 1) 556 putchar('\n'); 557 close(fd); 558} 559 560static void 561writeit(const char *name, const char *reg, const char *data, int width) 562{ 563 int fd; 564 struct pci_io pi; 565 566 pi.pi_sel = getsel(name); 567 pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */ 568 pi.pi_width = width; 569 pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */ 570 571 fd = open(_PATH_DEVPCI, O_RDWR, 0); 572 if (fd < 0) 573 err(1, "%s", _PATH_DEVPCI); 574 575 if (ioctl(fd, PCIOCWRITE, &pi) < 0) 576 err(1, "ioctl(PCIOCWRITE)"); 577} 578 579static void 580chkattached (const char *name, int width) 581{ 582 int fd; 583 struct pci_io pi; 584 585 pi.pi_sel = getsel(name); 586 pi.pi_reg = 0; 587 pi.pi_width = width; 588 pi.pi_data = 0; 589 590 fd = open(_PATH_DEVPCI, O_RDWR, 0); 591 if (fd < 0) 592 err(1, "%s", _PATH_DEVPCI); 593 594 if (ioctl(fd, PCIOCATTACHED, &pi) < 0) 595 err(1, "ioctl(PCIOCATTACHED)"); 596 597 exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */ 598 printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached"); 599} 600