pciconf.c revision 77533
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 77533 2001-05-31 18:31:43Z imp $"; 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 list_devs(int vendors); 68static void list_verbose(struct pci_conf *p); 69static char *guess_class(struct pci_conf *p); 70static char *guess_subclass(struct pci_conf *p); 71static int load_vendors(void); 72static void readit(const char *, const char *, int); 73static void writeit(const char *, const char *, const char *, int); 74static void chkattached(const char *, int); 75 76static int exitstatus = 0; 77 78static void 79usage() 80{ 81 fprintf(stderr, "%s\n%s\n%s\n%s\n", 82 "usage: pciconf -l [-v]", 83 " pciconf -a sel", 84 " pciconf -r [-b | -h] sel addr[:addr]", 85 " pciconf -w [-b | -h] sel addr [value]"); 86 exit (1); 87} 88 89int 90main(int argc, char **argv) 91{ 92 int c; 93 int listmode, readmode, writemode, attachedmode, verbose; 94 int byte, isshort; 95 96 listmode = readmode = writemode = attachedmode = verbose = byte = isshort = 0; 97 98 while ((c = getopt(argc, argv, "alrwbhv")) != -1) { 99 switch(c) { 100 case 'a': 101 attachedmode = 1; 102 break; 103 104 case 'l': 105 listmode = 1; 106 break; 107 108 case 'r': 109 readmode = 1; 110 break; 111 112 case 'w': 113 writemode = 1; 114 break; 115 116 case 'b': 117 byte = 1; 118 break; 119 120 case 'h': 121 isshort = 1; 122 break; 123 124 case 'v': 125 verbose = 1; 126 break; 127 128 default: 129 usage(); 130 } 131 } 132 133 if ((listmode && optind != argc) 134 || (writemode && optind + 3 != argc) 135 || (readmode && optind + 2 != argc) 136 || (attachedmode && optind + 1 != argc)) 137 usage(); 138 139 if (listmode) { 140 list_devs(verbose); 141 } else if (attachedmode) { 142 chkattached(argv[optind], 143 byte ? 1 : isshort ? 2 : 4); 144 } else if (readmode) { 145 readit(argv[optind], argv[optind + 1], 146 byte ? 1 : isshort ? 2 : 4); 147 } else if (writemode) { 148 writeit(argv[optind], argv[optind + 1], argv[optind + 2], 149 byte ? 1 : isshort ? 2 : 4); 150 } else { 151 usage(); 152 } 153 154 return exitstatus; 155} 156 157static void 158list_devs(int verbose) 159{ 160 int fd; 161 struct pci_conf_io pc; 162 struct pci_conf conf[255], *p; 163 int none_count = 0; 164 165 if (verbose) 166 load_vendors(); 167 168 fd = open(_PATH_DEVPCI, O_RDWR, 0); 169 if (fd < 0) 170 err(1, "%s", _PATH_DEVPCI); 171 172 bzero(&pc, sizeof(struct pci_conf_io)); 173 pc.match_buf_len = sizeof(conf); 174 pc.matches = conf; 175 176 do { 177 if (ioctl(fd, PCIOCGETCONF, &pc) == -1) 178 err(1, "ioctl(PCIOCGETCONF)"); 179 180 /* 181 * 255 entries should be more than enough for most people, 182 * but if someone has more devices, and then changes things 183 * around between ioctls, we'll do the cheezy thing and 184 * just bail. The alternative would be to go back to the 185 * beginning of the list, and print things twice, which may 186 * not be desireable. 187 */ 188 if (pc.status == PCI_GETCONF_LIST_CHANGED) { 189 warnx("PCI device list changed, please try again"); 190 exitstatus = 1; 191 close(fd); 192 return; 193 } else if (pc.status == PCI_GETCONF_ERROR) { 194 warnx("error returned from PCIOCGETCONF ioctl"); 195 exitstatus = 1; 196 close(fd); 197 return; 198 } 199 for (p = conf; p < &conf[pc.num_matches]; p++) { 200 201 printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08x " 202 "chip=0x%08x rev=0x%02x hdr=0x%02x\n", 203 (p->pd_name && *p->pd_name) ? p->pd_name : 204 "none", 205 (p->pd_name && *p->pd_name) ? (int)p->pd_unit : 206 none_count++, 207 p->pc_sel.pc_bus, p->pc_sel.pc_dev, 208 p->pc_sel.pc_func, (p->pc_class << 16) | 209 (p->pc_subclass << 8) | p->pc_progif, 210 (p->pc_subdevice << 16) | p->pc_subvendor, 211 (p->pc_device << 16) | p->pc_vendor, 212 p->pc_revid, p->pc_hdr); 213 if (verbose) 214 list_verbose(p); 215 } 216 } while (pc.status == PCI_GETCONF_MORE_DEVS); 217 218 close(fd); 219} 220 221static void 222list_verbose(struct pci_conf *p) 223{ 224 struct pci_vendor_info *vi; 225 struct pci_device_info *di; 226 char *dp; 227 228 TAILQ_FOREACH(vi, &pci_vendors, link) { 229 if (vi->id == p->pc_vendor) { 230 printf(" vendor = '%s'\n", vi->desc); 231 break; 232 } 233 } 234 if (vi == NULL) { 235 di = NULL; 236 } else { 237 TAILQ_FOREACH(di, &vi->devs, link) { 238 if (di->id == p->pc_device) { 239 printf(" device = '%s'\n", di->desc); 240 break; 241 } 242 } 243 } 244 if ((dp = guess_class(p)) != NULL) 245 printf(" class = %s\n", dp); 246 if ((dp = guess_subclass(p)) != NULL) 247 printf(" subclass = %s\n", dp); 248} 249 250/* 251 * This is a direct cut-and-paste from the table in sys/dev/pci/pci.c. 252 */ 253static struct 254{ 255 int class; 256 int subclass; 257 char *desc; 258} pci_nomatch_tab[] = { 259 {PCIC_OLD, -1, "old"}, 260 {PCIC_OLD, PCIS_OLD_NONVGA, "non-VGA display device"}, 261 {PCIC_OLD, PCIS_OLD_VGA, "VGA-compatible display device"}, 262 {PCIC_STORAGE, -1, "mass storage"}, 263 {PCIC_STORAGE, PCIS_STORAGE_SCSI, "SCSI"}, 264 {PCIC_STORAGE, PCIS_STORAGE_IDE, "ATA"}, 265 {PCIC_STORAGE, PCIS_STORAGE_FLOPPY, "floppy disk"}, 266 {PCIC_STORAGE, PCIS_STORAGE_IPI, "IPI"}, 267 {PCIC_STORAGE, PCIS_STORAGE_RAID, "RAID"}, 268 {PCIC_NETWORK, -1, "network"}, 269 {PCIC_NETWORK, PCIS_NETWORK_ETHERNET, "ethernet"}, 270 {PCIC_NETWORK, PCIS_NETWORK_TOKENRING, "token ring"}, 271 {PCIC_NETWORK, PCIS_NETWORK_FDDI, "fddi"}, 272 {PCIC_NETWORK, PCIS_NETWORK_ATM, "ATM"}, 273 {PCIC_DISPLAY, -1, "display"}, 274 {PCIC_DISPLAY, PCIS_DISPLAY_VGA, "VGA"}, 275 {PCIC_DISPLAY, PCIS_DISPLAY_XGA, "XGA"}, 276 {PCIC_MULTIMEDIA, -1, "multimedia"}, 277 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_VIDEO, "video"}, 278 {PCIC_MULTIMEDIA, PCIS_MULTIMEDIA_AUDIO, "audio"}, 279 {PCIC_MEMORY, -1, "memory"}, 280 {PCIC_MEMORY, PCIS_MEMORY_RAM, "RAM"}, 281 {PCIC_MEMORY, PCIS_MEMORY_FLASH, "flash"}, 282 {PCIC_BRIDGE, -1, "bridge"}, 283 {PCIC_BRIDGE, PCIS_BRIDGE_HOST, "HOST-PCI"}, 284 {PCIC_BRIDGE, PCIS_BRIDGE_ISA, "PCI-ISA"}, 285 {PCIC_BRIDGE, PCIS_BRIDGE_EISA, "PCI-EISA"}, 286 {PCIC_BRIDGE, PCIS_BRIDGE_MCA, "PCI-MCA"}, 287 {PCIC_BRIDGE, PCIS_BRIDGE_PCI, "PCI-PCI"}, 288 {PCIC_BRIDGE, PCIS_BRIDGE_PCMCIA, "PCI-PCMCIA"}, 289 {PCIC_BRIDGE, PCIS_BRIDGE_NUBUS, "PCI-NuBus"}, 290 {PCIC_BRIDGE, PCIS_BRIDGE_CARDBUS, "PCI-CardBus"}, 291 {PCIC_BRIDGE, PCIS_BRIDGE_OTHER, "PCI-unknown"}, 292 {PCIC_SIMPLECOMM, -1, "simple comms"}, 293 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_UART, "UART"}, /* could detect 16550 */ 294 {PCIC_SIMPLECOMM, PCIS_SIMPLECOMM_PAR, "parallel port"}, 295 {PCIC_BASEPERIPH, -1, "base peripheral"}, 296 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_PIC, "interrupt controller"}, 297 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_DMA, "DMA controller"}, 298 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_TIMER, "timer"}, 299 {PCIC_BASEPERIPH, PCIS_BASEPERIPH_RTC, "realtime clock"}, 300 {PCIC_INPUTDEV, -1, "input device"}, 301 {PCIC_INPUTDEV, PCIS_INPUTDEV_KEYBOARD, "keyboard"}, 302 {PCIC_INPUTDEV, PCIS_INPUTDEV_DIGITIZER,"digitizer"}, 303 {PCIC_INPUTDEV, PCIS_INPUTDEV_MOUSE, "mouse"}, 304 {PCIC_DOCKING, -1, "docking station"}, 305 {PCIC_PROCESSOR, -1, "processor"}, 306 {PCIC_SERIALBUS, -1, "serial bus"}, 307 {PCIC_SERIALBUS, PCIS_SERIALBUS_FW, "FireWire"}, 308 {PCIC_SERIALBUS, PCIS_SERIALBUS_ACCESS, "AccessBus"}, 309 {PCIC_SERIALBUS, PCIS_SERIALBUS_SSA, "SSA"}, 310 {PCIC_SERIALBUS, PCIS_SERIALBUS_USB, "USB"}, 311 {PCIC_SERIALBUS, PCIS_SERIALBUS_FC, "Fibre Channel"}, 312 {PCIC_SERIALBUS, PCIS_SERIALBUS_SMBUS, "SMBus"}, 313 {0, 0, NULL} 314}; 315 316static char * 317guess_class(struct pci_conf *p) 318{ 319 int i; 320 321 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 322 if (pci_nomatch_tab[i].class == p->pc_class) 323 return(pci_nomatch_tab[i].desc); 324 } 325 return(NULL); 326} 327 328static char * 329guess_subclass(struct pci_conf *p) 330{ 331 int i; 332 333 for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) { 334 if ((pci_nomatch_tab[i].class == p->pc_class) && 335 (pci_nomatch_tab[i].subclass == p->pc_subclass)) 336 return(pci_nomatch_tab[i].desc); 337 } 338 return(NULL); 339} 340 341static int 342load_vendors(void) 343{ 344 char *dbf; 345 FILE *db; 346 struct pci_vendor_info *cv; 347 struct pci_device_info *cd; 348 char buf[100], str[100]; 349 int id, error; 350 351 /* 352 * Locate the database and initialise. 353 */ 354 TAILQ_INIT(&pci_vendors); 355 if ((dbf = getenv("PCICONF_VENDOR_DATABASE")) == NULL) 356 dbf = _PATH_PCIVDB; 357 if ((db = fopen(dbf, "r")) == NULL) 358 return(1); 359 cv = NULL; 360 cd = NULL; 361 error = 0; 362 363 /* 364 * Scan input lines from the database 365 */ 366 for (;;) { 367 if (fgets(buf, sizeof(buf), db) == NULL) 368 break; 369 370 /* Check for vendor entry */ 371 if ((buf[0] != '\t') && (sscanf(buf, "%04x\t%[^\n]", &id, str) == 2)) { 372 if ((id == 0) || (strlen(str) < 1)) 373 continue; 374 if ((cv = malloc(sizeof(struct pci_vendor_info))) == NULL) { 375 warn("allocating vendor entry"); 376 error = 1; 377 break; 378 } 379 if ((cv->desc = strdup(str)) == NULL) { 380 free(cv); 381 warn("allocating vendor description"); 382 error = 1; 383 break; 384 } 385 cv->id = id; 386 TAILQ_INIT(&cv->devs); 387 TAILQ_INSERT_TAIL(&pci_vendors, cv, link); 388 continue; 389 } 390 391 /* Check for device entry */ 392 if ((buf[0] == '\t') && (sscanf(buf + 1, "%04x\t%[^\n]", &id, str) == 2)) { 393 if ((id == 0) || (strlen(str) < 1)) 394 continue; 395 if (cv == NULL) { 396 warnx("device entry with no vendor!"); 397 continue; 398 } 399 if ((cd = malloc(sizeof(struct pci_device_info))) == NULL) { 400 warn("allocating device entry"); 401 error = 1; 402 break; 403 } 404 if ((cd->desc = strdup(str)) == NULL) { 405 free(cd); 406 warn("allocating device description"); 407 error = 1; 408 break; 409 } 410 cd->id = id; 411 TAILQ_INSERT_TAIL(&cv->devs, cd, link); 412 continue; 413 } 414 415 /* It's a comment or junk, ignore it */ 416 } 417 if (ferror(db)) 418 error = 1; 419 fclose(db); 420 421 return(error); 422} 423 424 425static struct pcisel 426getsel(const char *str) 427{ 428 char *ep = (char*) str; 429 struct pcisel sel; 430 431 if (strncmp(ep, "pci", 3) == 0) { 432 ep += 3; 433 sel.pc_bus = strtoul(ep, &ep, 0); 434 if (!ep || *ep++ != ':') 435 errx(1, "cannot parse selector %s", str); 436 sel.pc_dev = strtoul(ep, &ep, 0); 437 if (!ep || *ep != ':') { 438 sel.pc_func = 0; 439 } else { 440 ep++; 441 sel.pc_func = strtoul(ep, &ep, 0); 442 } 443 } 444 if (*ep == ':') 445 ep++; 446 if (*ep || ep == str) 447 errx(1, "cannot parse selector %s", str); 448 return sel; 449} 450 451static void 452readone(int fd, struct pcisel *sel, long reg, int width) 453{ 454 struct pci_io pi; 455 456 pi.pi_sel = *sel; 457 pi.pi_reg = reg; 458 pi.pi_width = width; 459 460 if (ioctl(fd, PCIOCREAD, &pi) < 0) 461 err(1, "ioctl(PCIOCREAD)"); 462 463 printf("0x%08x", pi.pi_data); 464} 465 466static void 467readit(const char *name, const char *reg, int width) 468{ 469 long rstart; 470 long rend; 471 long r; 472 char *end; 473 int i; 474 int fd; 475 struct pcisel sel; 476 477 fd = open(_PATH_DEVPCI, O_RDWR, 0); 478 if (fd < 0) 479 err(1, "%s", _PATH_DEVPCI); 480 481 rend = rstart = strtol(reg, &end, 0); 482 if (end && *end == ':') { 483 end++; 484 rend = strtol(end, (char **) 0, 0); 485 } 486 sel = getsel(name); 487 for (i = 1, r = rstart; r <= rend; i++, r += width) { 488 readone(fd, &sel, r, width); 489 putchar(i % 4 ? ' ' : '\n'); 490 } 491 if (i % 4 != 1) 492 putchar('\n'); 493 close(fd); 494} 495 496static void 497writeit(const char *name, const char *reg, const char *data, int width) 498{ 499 int fd; 500 struct pci_io pi; 501 502 pi.pi_sel = getsel(name); 503 pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */ 504 pi.pi_width = width; 505 pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */ 506 507 fd = open(_PATH_DEVPCI, O_RDWR, 0); 508 if (fd < 0) 509 err(1, "%s", _PATH_DEVPCI); 510 511 if (ioctl(fd, PCIOCWRITE, &pi) < 0) 512 err(1, "ioctl(PCIOCWRITE)"); 513} 514 515static void 516chkattached (const char *name, int width) 517{ 518 int fd; 519 struct pci_io pi; 520 521 pi.pi_sel = getsel(name); 522 pi.pi_reg = 0; 523 pi.pi_width = width; 524 pi.pi_data = 0; 525 526 fd = open(_PATH_DEVPCI, O_RDWR, 0); 527 if (fd < 0) 528 err(1, "%s", _PATH_DEVPCI); 529 530 if (ioctl(fd, PCIOCATTACHED, &pi) < 0) 531 err(1, "ioctl(PCIOCATTACHED)"); 532 533 exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */ 534 printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached"); 535} 536