usr.sbin/pciconf/pciconf.c

   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  * $FreeBSD: src/usr.sbin/pciconf/pciconf.c,v 1.11.2.3 2002/09/17 22:09:15 jdp Exp $
  30  * $DragonFly: src/usr.sbin/pciconf/pciconf.c,v 1.6 2005/01/01 22:06:25 cpressey Exp $
  31  */
  32
  33 #include <sys/types.h>
  34 #include <sys/fcntl.h>
  35
  36 #include <err.h>
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41 #include <sys/pciio.h>
  42 #include <sys/queue.h>
  43
  44 #include <bus/pci/pcireg.h>
  45
  46 #include "pathnames.h"
  47
  48 struct pci_device_info
  49 {
  50     TAILQ_ENTRY(pci_device_info)        link;
  51     int                                 id;
  52     char                                *desc;
  53 };
  54
  55 struct pci_vendor_info
  56 {
  57     TAILQ_ENTRY(pci_vendor_info)        link;
  58     TAILQ_HEAD(,pci_device_info)        devs;
  59     int                                 id;
  60     char                                *desc;
  61 };
  62
  63 TAILQ_HEAD(,pci_vendor_info)    pci_vendors;
  64
  65 static void list_devs(int vendors);
  66 static void list_verbose(struct pci_conf *p);
  67 static const char *guess_class(struct pci_conf *p);
  68 static const char *guess_subclass(struct pci_conf *p);
  69 static int load_vendors(void);
  70 static void readit(const char *, const char *, int);
  71 static void writeit(const char *, const char *, const char *, int);
  72 static void chkattached(const char *, int);
  73
  74 static int exitstatus = 0;
  75
  76 static void
  77 usage(void)
  78 {
  79         fprintf(stderr, "%s\n%s\n%s\n%s\n",
  80                 "usage: pciconf -l [-v]",
  81                 "       pciconf -a selector",
  82                 "       pciconf -r [-b | -h] selector addr[:addr2]",
  83                 "       pciconf -w [-b | -h] selector addr value");
  84         exit (1);
  85 }
  86
  87 int
  88 main(int argc, char **argv)
  89 {
  90         int c;
  91         int listmode, readmode, writemode, attachedmode, verbose;
  92         int byte, isshort;
  93
  94         listmode = readmode = writemode = attachedmode = verbose = byte = isshort = 0;
  95
  96         while ((c = getopt(argc, argv, "alrwbhv")) != -1) {
  97                 switch(c) {
  98                 case 'a':
  99                         attachedmode = 1;
 100                         break;
 101
 102                 case 'l':
 103                         listmode = 1;
 104                         break;
 105
 106                 case 'r':
 107                         readmode = 1;
 108                         break;
 109
 110                 case 'w':
 111                         writemode = 1;
 112                         break;
 113
 114                 case 'b':
 115                         byte = 1;
 116                         break;
 117
 118                 case 'h':
 119                         isshort = 1;
 120                         break;
 121
 122                 case 'v':
 123                         verbose = 1;
 124                         break;
 125
 126                 default:
 127                         usage();
 128                 }
 129         }
 130
 131         if ((listmode && optind != argc)
 132             || (writemode && optind + 3 != argc)
 133             || (readmode && optind + 2 != argc)
 134             || (attachedmode && optind + 1 != argc))
 135                 usage();
 136
 137         if (listmode) {
 138                 list_devs(verbose);
 139         } else if(attachedmode) {
 140                 chkattached(argv[optind],
 141                        byte ? 1 : isshort ? 2 : 4);
 142         } else if(readmode) {
 143                 readit(argv[optind], argv[optind + 1],
 144                        byte ? 1 : isshort ? 2 : 4);
 145         } else if(writemode) {
 146                 writeit(argv[optind], argv[optind + 1], argv[optind + 2],
 147                        byte ? 1 : isshort ? 2 : 4);
 148         } else {
 149                 usage();
 150         }
 151
 152         return exitstatus;
 153 }
 154
 155 static void
 156 list_devs(int verbose)
 157 {
 158         int fd;
 159         struct pci_conf_io pc;
 160         struct pci_conf conf[255], *p;
 161         int none_count = 0;
 162
 163         if (verbose)
 164                 load_vendors();
 165
 166         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 167         if (fd < 0)
 168                 err(1, "%s", _PATH_DEVPCI);
 169
 170         bzero(&pc, sizeof(struct pci_conf_io));
 171         pc.match_buf_len = sizeof(conf);
 172         pc.matches = conf;
 173
 174         do {
 175                 if (ioctl(fd, PCIOCGETCONF, &pc) == -1)
 176                         err(1, "ioctl(PCIOCGETCONF)");
 177
 178                 /*
 179                  * 255 entries should be more than enough for most people,
 180                  * but if someone has more devices, and then changes things
 181                  * around between ioctls, we'll do the cheezy thing and
 182                  * just bail.  The alternative would be to go back to the
 183                  * beginning of the list, and print things twice, which may
 184                  * not be desireable.
 185                  */
 186                 if (pc.status == PCI_GETCONF_LIST_CHANGED) {
 187                         warnx("PCI device list changed, please try again");
 188                         exitstatus = 1;
 189                         close(fd);
 190                         return;
 191                 } else if (pc.status ==  PCI_GETCONF_ERROR) {
 192                         warnx("error returned from PCIOCGETCONF ioctl");
 193                         exitstatus = 1;
 194                         close(fd);
 195                         return;
 196                 }
 197                 for (p = conf; p < &conf[pc.num_matches]; p++) {
 198
 199                         printf("%s%d@pci%d:%d:%d:\tclass=0x%06x card=0x%08x "
 200                                "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
 201                                (p->pd_name && *p->pd_name) ? p->pd_name :
 202                                "none",
 203                                (p->pd_name && *p->pd_name) ? (int)p->pd_unit :
 204                                none_count++,
 205                                p->pc_sel.pc_bus, p->pc_sel.pc_dev,
 206                                p->pc_sel.pc_func, (p->pc_class << 16) |
 207                                (p->pc_subclass << 8) | p->pc_progif,
 208                                (p->pc_subdevice << 16) | p->pc_subvendor,
 209                                (p->pc_device << 16) | p->pc_vendor,
 210                                p->pc_revid, p->pc_hdr);
 211                         if (verbose)
 212                                 list_verbose(p);
 213                 }
 214         } while (pc.status == PCI_GETCONF_MORE_DEVS);
 215
 216         close(fd);
 217 }
 218
 219 static void
 220 list_verbose(struct pci_conf *p)
 221 {
 222         struct pci_vendor_info  *vi;
 223         struct pci_device_info  *di;
 224         const char *dp;
 225
 226         TAILQ_FOREACH(vi, &pci_vendors, link) {
 227                 if (vi->id == p->pc_vendor) {
 228                         printf("    vendor   = '%s'\n", vi->desc);
 229                         break;
 230                 }
 231         }
 232         if (vi == NULL) {
 233                 di = NULL;
 234         } else {
 235                 TAILQ_FOREACH(di, &vi->devs, link) {
 236                         if (di->id == p->pc_device) {
 237                                 printf("    device   = '%s'\n", di->desc);
 238                                 break;
 239                         }
 240                 }
 241         }
 242         if ((dp = guess_class(p)) != NULL)
 243                 printf("    class    = %s\n", dp);
 244         if ((dp = guess_subclass(p)) != NULL)
 245                 printf("    subclass = %s\n", dp);
 246 }
 247
 248 /*
 249  * This is a direct cut-and-paste from the table in sys/bus/pci/pcireg.h.
 250  */
 251 static struct
 252 {
 253         int     class;
 254         int     subclass;
 255         const char *desc;
 256 } pci_nomatch_tab[] = {
 257         {PCIC_OLD,              -1,                     "old"},
 258         {PCIC_OLD,              PCIS_OLD_NONVGA,        "non-VGA display device"},
 259         {PCIC_OLD,              PCIS_OLD_VGA,           "VGA-compatible display device"},
 260         {PCIC_STORAGE,          -1,                     "mass storage"},
 261         {PCIC_STORAGE,          PCIS_STORAGE_SCSI,      "SCSI"},
 262         {PCIC_STORAGE,          PCIS_STORAGE_IDE,       "ATA"},
 263         {PCIC_STORAGE,          PCIS_STORAGE_FLOPPY,    "floppy disk"},
 264         {PCIC_STORAGE,          PCIS_STORAGE_IPI,       "IPI"},
 265         {PCIC_STORAGE,          PCIS_STORAGE_RAID,      "RAID"},
 266         {PCIC_STORAGE,          PCIS_STORAGE_ATA,       "ATA"},
 267         {PCIC_STORAGE,          PCIS_STORAGE_SATA,      "SATA"},
 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_NETWORK,          PCIS_NETWORK_ISDN,      "ISDN"},
 274         {PCIC_DISPLAY,          -1,                     "display"},
 275         {PCIC_DISPLAY,          PCIS_DISPLAY_VGA,       "VGA"},
 276         {PCIC_DISPLAY,          PCIS_DISPLAY_XGA,       "XGA"},
 277         {PCIC_DISPLAY,          PCIS_DISPLAY_3D,        "3D"},
 278         {PCIC_MULTIMEDIA,       -1,                     "multimedia"},
 279         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_VIDEO,  "video"},
 280         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_AUDIO,  "audio"},
 281         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_TEL,    "telephony"},
 282         {PCIC_MEMORY,           -1,                     "memory"},
 283         {PCIC_MEMORY,           PCIS_MEMORY_RAM,        "RAM"},
 284         {PCIC_MEMORY,           PCIS_MEMORY_FLASH,      "flash"},
 285         {PCIC_BRIDGE,           -1,                     "bridge"},
 286         {PCIC_BRIDGE,           PCIS_BRIDGE_HOST,       "HOST-PCI"},
 287         {PCIC_BRIDGE,           PCIS_BRIDGE_ISA,        "PCI-ISA"},
 288         {PCIC_BRIDGE,           PCIS_BRIDGE_EISA,       "PCI-EISA"},
 289         {PCIC_BRIDGE,           PCIS_BRIDGE_MCA,        "PCI-MCA"},
 290         {PCIC_BRIDGE,           PCIS_BRIDGE_PCI,        "PCI-PCI"},
 291         {PCIC_BRIDGE,           PCIS_BRIDGE_PCMCIA,     "PCI-PCMCIA"},
 292         {PCIC_BRIDGE,           PCIS_BRIDGE_NUBUS,      "PCI-NuBus"},
 293         {PCIC_BRIDGE,           PCIS_BRIDGE_CARDBUS,    "PCI-CardBus"},
 294         {PCIC_BRIDGE,           PCIS_BRIDGE_INFINI,     "PCI-InfiniBand"},
 295         {PCIC_BRIDGE,           PCIS_BRIDGE_OTHER,      "PCI-unknown"},
 296         {PCIC_SIMPLECOMM,       -1,                     "simple comms"},
 297         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_UART,   "UART"},        /* could detect 16550 */
 298         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_PAR,    "parallel port"},
 299         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MULTSER,"multiport serial"},
 300         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MODEM,  "generic modem"},
 301         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_SMART,  "smartcard"},
 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_BASEPERIPH,       PCIS_BASEPERIPH_HOTPLUG,"PCI Hotplug"},
 308         {PCIC_INPUTDEV,         -1,                     "input device"},
 309         {PCIC_INPUTDEV,         PCIS_INPUTDEV_KEYBOARD, "keyboard"},
 310         {PCIC_INPUTDEV,         PCIS_INPUTDEV_DIGITIZER,"digitizer"},
 311         {PCIC_INPUTDEV,         PCIS_INPUTDEV_MOUSE,    "mouse"},
 312         {PCIC_INPUTDEV,         PCIS_INPUTDEV_SCANNER,  "scanner"},
 313         {PCIC_INPUTDEV,         PCIS_INPUTDEV_GAMEPORT, "gameport"},
 314         {PCIC_DOCKING,          -1,                     "docking station"},
 315         {PCIC_PROCESSOR,        -1,                     "processor"},
 316         {PCIC_SERIALBUS,        -1,                     "serial bus"},
 317         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FW,      "FireWire"},
 318         {PCIC_SERIALBUS,        PCIS_SERIALBUS_ACCESS,  "AccessBus"},
 319         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SSA,     "SSA"},
 320         {PCIC_SERIALBUS,        PCIS_SERIALBUS_USB,     "USB"},
 321         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FC,      "Fibre Channel"},
 322         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SMBUS,   "SMBus"},
 323         {PCIC_SERIALBUS,        PCIS_SERIALBUS_INFINI,  "InfiniBand"},
 324         {PCIC_WIRELESS,         -1,                     "wireless"},
 325         {PCIC_WIRELESS,         PCIS_WIRELESS_IRDA,     "iRDA"},
 326         {PCIC_WIRELESS,         PCIS_WIRELESS_IR,       "consumer IR"},
 327         {PCIC_WIRELESS,         PCIS_WIRELESS_RF,       "RF controller"},
 328         {PCIC_WIRELESS,         PCIS_WIRELESS_BLUETOOTH,"Bluetooth"},
 329         {PCIC_WIRELESS,         PCIS_WIRELESS_BROADBAND,"broadband"},
 330         {PCIC_WIRELESS,         PCIS_WIRELESS_80211A,   "Ethernet (802.11a)"},
 331         {PCIC_WIRELESS,         PCIS_WIRELESS_80211B,   "Ethernet (802.11b)"},
 332         {PCIC_I2O,              -1,                     "I2O"},
 333         {PCIC_I2O,              PCIS_I2O_10,            "I2O 1.0"},
 334         {PCIC_SATELLITE,        -1,                     "satellite"},
 335         {PCIC_CRYPTO,           -1,                     "crypto controller"},
 336         {PCIC_SIGPROC,          -1,                     "signal processing"},
 337         {0, 0,          NULL}
 338 };
 339
 340 static const char *
 341 guess_class(struct pci_conf *p)
 342 {
 343         int     i;
 344
 345         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 346                 if (pci_nomatch_tab[i].class == p->pc_class)
 347                         return(pci_nomatch_tab[i].desc);
 348         }
 349         return(NULL);
 350 }
 351
 352 static const char *
 353 guess_subclass(struct pci_conf *p)
 354 {
 355         int     i;
 356
 357         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 358                 if ((pci_nomatch_tab[i].class == p->pc_class) &&
 359                     (pci_nomatch_tab[i].subclass == p->pc_subclass))
 360                         return(pci_nomatch_tab[i].desc);
 361         }
 362         return(NULL);
 363 }
 364
 365 static int
 366 load_vendors(void)
 367 {
 368         const char *dbf;
 369         FILE *db;
 370         struct pci_vendor_info *cv;
 371         struct pci_device_info *cd;
 372         char buf[100], str[100];
 373         int id, error;
 374
 375         /*
 376          * Locate the database and initialise.
 377          */
 378         TAILQ_INIT(&pci_vendors);
 379         if ((dbf = getenv("PCICONF_VENDOR_DATABASE")) == NULL)
 380                 dbf = _PATH_PCIVDB;
 381         if ((db = fopen(dbf, "r")) == NULL)
 382                 return(1);
 383         cv = NULL;
 384         cd = NULL;
 385         error = 0;
 386
 387         /*
 388          * Scan input lines from the database
 389          */
 390         for (;;) {
 391                 if (fgets(buf, sizeof(buf), db) == NULL)
 392                         break;
 393
 394                 /* Check for vendor entry */
 395                 if ((buf[0] != '\t') && (sscanf(buf, "%04x\t%[^\n]", &id, str) == 2)) {
 396                         if ((id == 0) || (strlen(str) < 1))
 397                                 continue;
 398                         if ((cv = malloc(sizeof(struct pci_vendor_info))) == NULL) {
 399                                 warn("allocating vendor entry");
 400                                 error = 1;
 401                                 break;
 402                         }
 403                         if ((cv->desc = strdup(str)) == NULL) {
 404                                 free(cv);
 405                                 warn("allocating vendor description");
 406                                 error = 1;
 407                                 break;
 408                         }
 409                         cv->id = id;
 410                         TAILQ_INIT(&cv->devs);
 411                         TAILQ_INSERT_TAIL(&pci_vendors, cv, link);
 412                         continue;
 413                 }
 414
 415                 /* Check for device entry */
 416                 if ((buf[0] == '\t') && (sscanf(buf + 1, "%04x\t%[^\n]", &id, str) == 2)) {
 417                         if ((id == 0) || (strlen(str) < 1))
 418                                 continue;
 419                         if (cv == NULL) {
 420                                 warnx("device entry with no vendor!");
 421                                 continue;
 422                         }
 423                         if ((cd = malloc(sizeof(struct pci_device_info))) == NULL) {
 424                                 warn("allocating device entry");
 425                                 error = 1;
 426                                 break;
 427                         }
 428                         if ((cd->desc = strdup(str)) == NULL) {
 429                                 free(cd);
 430                                 warn("allocating device description");
 431                                 error = 1;
 432                                 break;
 433                         }
 434                         cd->id = id;
 435                         TAILQ_INSERT_TAIL(&cv->devs, cd, link);
 436                         continue;
 437                 }
 438
 439                 /* It's a comment or junk, ignore it */
 440         }
 441         if (ferror(db))
 442                 error = 1;
 443         fclose(db);
 444
 445         return(error);
 446 }
 447
 448
 449 static struct pcisel
 450 getsel(const char *str)
 451 {
 452         char *parse_buf, *ep;
 453         struct pcisel sel;
 454
 455         parse_buf = strdup(str);
 456         ep = parse_buf;
 457
 458         if (strncmp(ep, "pci", 3) == 0) {
 459                 ep += 3;
 460                 sel.pc_bus = strtoul(ep, &ep, 0);
 461                 if (!ep || *ep++ != ':')
 462                         errx(1, "cannot parse selector %s", str);
 463                 sel.pc_dev = strtoul(ep, &ep, 0);
 464                 if (!ep || *ep != ':') {
 465                         sel.pc_func = 0;
 466                 } else {
 467                         ep++;
 468                         sel.pc_func = strtoul(ep, &ep, 0);
 469                 }
 470         }
 471         if (*ep == ':')
 472                 ep++;
 473         if (*ep || ep == parse_buf)
 474                 errx(1, "cannot parse selector %s", str);
 475         free(parse_buf);
 476
 477         return sel;
 478 }
 479
 480 static void
 481 readone(int fd, struct pcisel *sel, long reg, int width)
 482 {
 483         struct pci_io pi;
 484
 485         pi.pi_sel = *sel;
 486         pi.pi_reg = reg;
 487         pi.pi_width = width;
 488
 489         if (ioctl(fd, PCIOCREAD, &pi) < 0)
 490                 err(1, "ioctl(PCIOCREAD)");
 491
 492         printf("0x%08x", pi.pi_data);
 493 }
 494
 495 static void
 496 readit(const char *name, const char *reg, int width)
 497 {
 498         long rstart;
 499         long rend;
 500         long r;
 501         char *end;
 502         int i;
 503         int fd;
 504         struct pcisel sel;
 505
 506         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 507         if (fd < 0)
 508                 err(1, "%s", _PATH_DEVPCI);
 509
 510         rend = rstart = strtol(reg, &end, 0);
 511         if (end && *end == ':') {
 512                 end++;
 513                 rend = strtol(end, (char **) 0, 0);
 514         }
 515         sel = getsel(name);
 516         for (i = 1, r = rstart; r <= rend; i++, r += width) {
 517                 readone(fd, &sel, r, width);
 518                 putchar(i % 4 ? ' ' : '\n');
 519         }
 520         if (i % 4 != 1)
 521                 putchar('\n');
 522         close(fd);
 523 }
 524
 525 static void
 526 writeit(const char *name, const char *reg, const char *data, int width)
 527 {
 528         int fd;
 529         struct pci_io pi;
 530
 531         pi.pi_sel = getsel(name);
 532         pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
 533         pi.pi_width = width;
 534         pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
 535
 536         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 537         if (fd < 0)
 538                 err(1, "%s", _PATH_DEVPCI);
 539
 540         if (ioctl(fd, PCIOCWRITE, &pi) < 0)
 541                 err(1, "ioctl(PCIOCWRITE)");
 542 }
 543
 544 static void
 545 chkattached (const char *name, int width)
 546 {
 547         int fd;
 548         struct pci_io pi;
 549
 550         pi.pi_sel = getsel(name);
 551         pi.pi_reg = 0;
 552         pi.pi_width = width;
 553         pi.pi_data = 0;
 554
 555         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 556         if (fd < 0)
 557                 err(1, "%s", _PATH_DEVPCI);
 558
 559         if (ioctl(fd, PCIOCATTACHED, &pi) < 0)
 560                 err(1, "ioctl(PCIOCATTACHED)");
 561
 562         exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */
 563         printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached");
 564 }