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
  30 #ifndef lint
  31 static const char rcsid[] =
  32   "$FreeBSD$";
  33 #endif /* not lint */
  34
  35 #include <sys/types.h>
  36 #include <sys/fcntl.h>
  37
  38 #include <ctype.h>
  39 #include <err.h>
  40 #include <inttypes.h>
  41 #include <stdlib.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include <sys/pciio.h>
  46 #include <sys/queue.h>
  47
  48 #include <dev/pci/pcireg.h>
  49
  50 #include "pathnames.h"
  51 #include "pciconf.h"
  52
  53 struct pci_device_info
  54 {
  55     TAILQ_ENTRY(pci_device_info)        link;
  56     int                                 id;
  57     char                                *desc;
  58 };
  59
  60 struct pci_vendor_info
  61 {
  62     TAILQ_ENTRY(pci_vendor_info)        link;
  63     TAILQ_HEAD(,pci_device_info)        devs;
  64     int                                 id;
  65     char                                *desc;
  66 };
  67
  68 TAILQ_HEAD(,pci_vendor_info)    pci_vendors;
  69
  70 static void list_bars(int fd, struct pci_conf *p);
  71 static void list_devs(int verbose, int bars, int caps, int errors);
  72 static void list_verbose(struct pci_conf *p);
  73 static const char *guess_class(struct pci_conf *p);
  74 static const char *guess_subclass(struct pci_conf *p);
  75 static int load_vendors(void);
  76 static void readit(const char *, const char *, int);
  77 static void writeit(const char *, const char *, const char *, int);
  78 static void chkattached(const char *);
  79
  80 static int exitstatus = 0;
  81
  82 static void
  83 usage(void)
  84 {
  85         fprintf(stderr, "%s\n%s\n%s\n%s\n",
  86                 "usage: pciconf -l [-bcev]",
  87                 "       pciconf -a selector",
  88                 "       pciconf -r [-b | -h] selector addr[:addr2]",
  89                 "       pciconf -w [-b | -h] selector addr value");
  90         exit (1);
  91 }
  92
  93 int
  94 main(int argc, char **argv)
  95 {
  96         int c;
  97         int listmode, readmode, writemode, attachedmode;
  98         int bars, caps, errors, verbose;
  99         int byte, isshort;
 100
 101         listmode = readmode = writemode = attachedmode = 0;
 102         bars = caps = errors = verbose = byte = isshort = 0;
 103
 104         while ((c = getopt(argc, argv, "abcehlrwv")) != -1) {
 105                 switch(c) {
 106                 case 'a':
 107                         attachedmode = 1;
 108                         break;
 109
 110                 case 'b':
 111                         bars = 1;
 112                         byte = 1;
 113                         break;
 114
 115                 case 'c':
 116                         caps = 1;
 117                         break;
 118
 119                 case 'e':
 120                         errors = 1;
 121                         break;
 122
 123                 case 'h':
 124                         isshort = 1;
 125                         break;
 126
 127                 case 'l':
 128                         listmode = 1;
 129                         break;
 130
 131                 case 'r':
 132                         readmode = 1;
 133                         break;
 134
 135                 case 'w':
 136                         writemode = 1;
 137                         break;
 138
 139                 case 'v':
 140                         verbose = 1;
 141                         break;
 142
 143                 default:
 144                         usage();
 145                 }
 146         }
 147
 148         if ((listmode && optind != argc)
 149             || (writemode && optind + 3 != argc)
 150             || (readmode && optind + 2 != argc)
 151             || (attachedmode && optind + 1 != argc))
 152                 usage();
 153
 154         if (listmode) {
 155                 list_devs(verbose, bars, caps, errors);
 156         } else if (attachedmode) {
 157                 chkattached(argv[optind]);
 158         } else if (readmode) {
 159                 readit(argv[optind], argv[optind + 1],
 160                     byte ? 1 : isshort ? 2 : 4);
 161         } else if (writemode) {
 162                 writeit(argv[optind], argv[optind + 1], argv[optind + 2],
 163                     byte ? 1 : isshort ? 2 : 4);
 164         } else {
 165                 usage();
 166         }
 167
 168         return exitstatus;
 169 }
 170
 171 static void
 172 list_devs(int verbose, int bars, int caps, int errors)
 173 {
 174         int fd;
 175         struct pci_conf_io pc;
 176         struct pci_conf conf[255], *p;
 177         int none_count = 0;
 178
 179         if (verbose)
 180                 load_vendors();
 181
 182         fd = open(_PATH_DEVPCI, (caps || errors) ? O_RDWR : O_RDONLY, 0);
 183         if (fd < 0)
 184                 err(1, "%s", _PATH_DEVPCI);
 185
 186         bzero(&pc, sizeof(struct pci_conf_io));
 187         pc.match_buf_len = sizeof(conf);
 188         pc.matches = conf;
 189
 190         do {
 191                 if (ioctl(fd, PCIOCGETCONF, &pc) == -1)
 192                         err(1, "ioctl(PCIOCGETCONF)");
 193
 194                 /*
 195                  * 255 entries should be more than enough for most people,
 196                  * but if someone has more devices, and then changes things
 197                  * around between ioctls, we'll do the cheesy thing and
 198                  * just bail.  The alternative would be to go back to the
 199                  * beginning of the list, and print things twice, which may
 200                  * not be desirable.
 201                  */
 202                 if (pc.status == PCI_GETCONF_LIST_CHANGED) {
 203                         warnx("PCI device list changed, please try again");
 204                         exitstatus = 1;
 205                         close(fd);
 206                         return;
 207                 } else if (pc.status ==  PCI_GETCONF_ERROR) {
 208                         warnx("error returned from PCIOCGETCONF ioctl");
 209                         exitstatus = 1;
 210                         close(fd);
 211                         return;
 212                 }
 213                 for (p = conf; p < &conf[pc.num_matches]; p++) {
 214                         printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
 215                             "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
 216                             (p->pd_name && *p->pd_name) ? p->pd_name :
 217                             "none",
 218                             (p->pd_name && *p->pd_name) ? (int)p->pd_unit :
 219                             none_count++, p->pc_sel.pc_domain,
 220                             p->pc_sel.pc_bus, p->pc_sel.pc_dev,
 221                             p->pc_sel.pc_func, (p->pc_class << 16) |
 222                             (p->pc_subclass << 8) | p->pc_progif,
 223                             (p->pc_subdevice << 16) | p->pc_subvendor,
 224                             (p->pc_device << 16) | p->pc_vendor,
 225                             p->pc_revid, p->pc_hdr);
 226                         if (verbose)
 227                                 list_verbose(p);
 228                         if (bars)
 229                                 list_bars(fd, p);
 230                         if (caps)
 231                                 list_caps(fd, p);
 232                         if (errors)
 233                                 list_errors(fd, p);
 234                 }
 235         } while (pc.status == PCI_GETCONF_MORE_DEVS);
 236
 237         close(fd);
 238 }
 239
 240 static void
 241 list_bars(int fd, struct pci_conf *p)
 242 {
 243         struct pci_bar_io bar;
 244         uint64_t base;
 245         const char *type;
 246         int i, range, max;
 247
 248         switch (p->pc_hdr & PCIM_HDRTYPE) {
 249         case PCIM_HDRTYPE_NORMAL:
 250                 max = PCIR_MAX_BAR_0;
 251                 break;
 252         case PCIM_HDRTYPE_BRIDGE:
 253                 max = PCIR_MAX_BAR_1;
 254                 break;
 255         case PCIM_HDRTYPE_CARDBUS:
 256                 max = PCIR_MAX_BAR_2;
 257                 break;
 258         default:
 259                 return;
 260         }
 261
 262         for (i = 0; i <= max; i++) {
 263                 bar.pbi_sel = p->pc_sel;
 264                 bar.pbi_reg = PCIR_BAR(i);
 265                 if (ioctl(fd, PCIOCGETBAR, &bar) < 0)
 266                         continue;
 267                 if (PCI_BAR_IO(bar.pbi_base)) {
 268                         type = "I/O Port";
 269                         range = 32;
 270                         base = bar.pbi_base & PCIM_BAR_IO_BASE;
 271                 } else {
 272                         if (bar.pbi_base & PCIM_BAR_MEM_PREFETCH)
 273                                 type = "Prefetchable Memory";
 274                         else
 275                                 type = "Memory";
 276                         switch (bar.pbi_base & PCIM_BAR_MEM_TYPE) {
 277                         case PCIM_BAR_MEM_32:
 278                                 range = 32;
 279                                 break;
 280                         case PCIM_BAR_MEM_1MB:
 281                                 range = 20;
 282                                 break;
 283                         case PCIM_BAR_MEM_64:
 284                                 range = 64;
 285                                 break;
 286                         default:
 287                                 range = -1;
 288                         }
 289                         base = bar.pbi_base & ~((uint64_t)0xf);
 290                 }
 291                 printf("    bar   [%02x] = type %s, range %2d, base %#jx, ",
 292                     PCIR_BAR(i), type, range, (uintmax_t)base);
 293                 printf("size %ju, %s\n", (uintmax_t)bar.pbi_length,
 294                     bar.pbi_enabled ? "enabled" : "disabled");
 295         }
 296 }
 297
 298 static void
 299 list_verbose(struct pci_conf *p)
 300 {
 301         struct pci_vendor_info  *vi;
 302         struct pci_device_info  *di;
 303         const char *dp;
 304
 305         TAILQ_FOREACH(vi, &pci_vendors, link) {
 306                 if (vi->id == p->pc_vendor) {
 307                         printf("    vendor     = '%s'\n", vi->desc);
 308                         break;
 309                 }
 310         }
 311         if (vi == NULL) {
 312                 di = NULL;
 313         } else {
 314                 TAILQ_FOREACH(di, &vi->devs, link) {
 315                         if (di->id == p->pc_device) {
 316                                 printf("    device     = '%s'\n", di->desc);
 317                                 break;
 318                         }
 319                 }
 320         }
 321         if ((dp = guess_class(p)) != NULL)
 322                 printf("    class      = %s\n", dp);
 323         if ((dp = guess_subclass(p)) != NULL)
 324                 printf("    subclass   = %s\n", dp);
 325 }
 326
 327 /*
 328  * This is a direct cut-and-paste from the table in sys/dev/pci/pci.c.
 329  */
 330 static struct
 331 {
 332         int     class;
 333         int     subclass;
 334         const char *desc;
 335 } pci_nomatch_tab[] = {
 336         {PCIC_OLD,              -1,                     "old"},
 337         {PCIC_OLD,              PCIS_OLD_NONVGA,        "non-VGA display device"},
 338         {PCIC_OLD,              PCIS_OLD_VGA,           "VGA-compatible display device"},
 339         {PCIC_STORAGE,          -1,                     "mass storage"},
 340         {PCIC_STORAGE,          PCIS_STORAGE_SCSI,      "SCSI"},
 341         {PCIC_STORAGE,          PCIS_STORAGE_IDE,       "ATA"},
 342         {PCIC_STORAGE,          PCIS_STORAGE_FLOPPY,    "floppy disk"},
 343         {PCIC_STORAGE,          PCIS_STORAGE_IPI,       "IPI"},
 344         {PCIC_STORAGE,          PCIS_STORAGE_RAID,      "RAID"},
 345         {PCIC_STORAGE,          PCIS_STORAGE_ATA_ADMA,  "ATA (ADMA)"},
 346         {PCIC_STORAGE,          PCIS_STORAGE_SATA,      "SATA"},
 347         {PCIC_STORAGE,          PCIS_STORAGE_SAS,       "SAS"},
 348         {PCIC_STORAGE,          PCIS_STORAGE_NVM,       "NVM"},
 349         {PCIC_NETWORK,          -1,                     "network"},
 350         {PCIC_NETWORK,          PCIS_NETWORK_ETHERNET,  "ethernet"},
 351         {PCIC_NETWORK,          PCIS_NETWORK_TOKENRING, "token ring"},
 352         {PCIC_NETWORK,          PCIS_NETWORK_FDDI,      "fddi"},
 353         {PCIC_NETWORK,          PCIS_NETWORK_ATM,       "ATM"},
 354         {PCIC_NETWORK,          PCIS_NETWORK_ISDN,      "ISDN"},
 355         {PCIC_DISPLAY,          -1,                     "display"},
 356         {PCIC_DISPLAY,          PCIS_DISPLAY_VGA,       "VGA"},
 357         {PCIC_DISPLAY,          PCIS_DISPLAY_XGA,       "XGA"},
 358         {PCIC_DISPLAY,          PCIS_DISPLAY_3D,        "3D"},
 359         {PCIC_MULTIMEDIA,       -1,                     "multimedia"},
 360         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_VIDEO,  "video"},
 361         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_AUDIO,  "audio"},
 362         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_TELE,   "telephony"},
 363         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_HDA,    "HDA"},
 364         {PCIC_MEMORY,           -1,                     "memory"},
 365         {PCIC_MEMORY,           PCIS_MEMORY_RAM,        "RAM"},
 366         {PCIC_MEMORY,           PCIS_MEMORY_FLASH,      "flash"},
 367         {PCIC_BRIDGE,           -1,                     "bridge"},
 368         {PCIC_BRIDGE,           PCIS_BRIDGE_HOST,       "HOST-PCI"},
 369         {PCIC_BRIDGE,           PCIS_BRIDGE_ISA,        "PCI-ISA"},
 370         {PCIC_BRIDGE,           PCIS_BRIDGE_EISA,       "PCI-EISA"},
 371         {PCIC_BRIDGE,           PCIS_BRIDGE_MCA,        "PCI-MCA"},
 372         {PCIC_BRIDGE,           PCIS_BRIDGE_PCI,        "PCI-PCI"},
 373         {PCIC_BRIDGE,           PCIS_BRIDGE_PCMCIA,     "PCI-PCMCIA"},
 374         {PCIC_BRIDGE,           PCIS_BRIDGE_NUBUS,      "PCI-NuBus"},
 375         {PCIC_BRIDGE,           PCIS_BRIDGE_CARDBUS,    "PCI-CardBus"},
 376         {PCIC_BRIDGE,           PCIS_BRIDGE_RACEWAY,    "PCI-RACEway"},
 377         {PCIC_SIMPLECOMM,       -1,                     "simple comms"},
 378         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_UART,   "UART"},        /* could detect 16550 */
 379         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_PAR,    "parallel port"},
 380         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MULSER, "multiport serial"},
 381         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MODEM,  "generic modem"},
 382         {PCIC_BASEPERIPH,       -1,                     "base peripheral"},
 383         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_PIC,    "interrupt controller"},
 384         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_DMA,    "DMA controller"},
 385         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_TIMER,  "timer"},
 386         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_RTC,    "realtime clock"},
 387         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_PCIHOT, "PCI hot-plug controller"},
 388         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_SDHC,   "SD host controller"},
 389         {PCIC_INPUTDEV,         -1,                     "input device"},
 390         {PCIC_INPUTDEV,         PCIS_INPUTDEV_KEYBOARD, "keyboard"},
 391         {PCIC_INPUTDEV,         PCIS_INPUTDEV_DIGITIZER,"digitizer"},
 392         {PCIC_INPUTDEV,         PCIS_INPUTDEV_MOUSE,    "mouse"},
 393         {PCIC_INPUTDEV,         PCIS_INPUTDEV_SCANNER,  "scanner"},
 394         {PCIC_INPUTDEV,         PCIS_INPUTDEV_GAMEPORT, "gameport"},
 395         {PCIC_DOCKING,          -1,                     "docking station"},
 396         {PCIC_PROCESSOR,        -1,                     "processor"},
 397         {PCIC_SERIALBUS,        -1,                     "serial bus"},
 398         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FW,      "FireWire"},
 399         {PCIC_SERIALBUS,        PCIS_SERIALBUS_ACCESS,  "AccessBus"},
 400         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SSA,     "SSA"},
 401         {PCIC_SERIALBUS,        PCIS_SERIALBUS_USB,     "USB"},
 402         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FC,      "Fibre Channel"},
 403         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SMBUS,   "SMBus"},
 404         {PCIC_WIRELESS,         -1,                     "wireless controller"},
 405         {PCIC_WIRELESS,         PCIS_WIRELESS_IRDA,     "iRDA"},
 406         {PCIC_WIRELESS,         PCIS_WIRELESS_IR,       "IR"},
 407         {PCIC_WIRELESS,         PCIS_WIRELESS_RF,       "RF"},
 408         {PCIC_INTELLIIO,        -1,                     "intelligent I/O controller"},
 409         {PCIC_INTELLIIO,        PCIS_INTELLIIO_I2O,     "I2O"},
 410         {PCIC_SATCOM,           -1,                     "satellite communication"},
 411         {PCIC_SATCOM,           PCIS_SATCOM_TV,         "sat TV"},
 412         {PCIC_SATCOM,           PCIS_SATCOM_AUDIO,      "sat audio"},
 413         {PCIC_SATCOM,           PCIS_SATCOM_VOICE,      "sat voice"},
 414         {PCIC_SATCOM,           PCIS_SATCOM_DATA,       "sat data"},
 415         {PCIC_CRYPTO,           -1,                     "encrypt/decrypt"},
 416         {PCIC_CRYPTO,           PCIS_CRYPTO_NETCOMP,    "network/computer crypto"},
 417         {PCIC_CRYPTO,           PCIS_CRYPTO_NETCOMP,    "entertainment crypto"},
 418         {PCIC_DASP,             -1,                     "dasp"},
 419         {PCIC_DASP,             PCIS_DASP_DPIO,         "DPIO module"},
 420         {0, 0,          NULL}
 421 };
 422
 423 static const char *
 424 guess_class(struct pci_conf *p)
 425 {
 426         int     i;
 427
 428         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 429                 if (pci_nomatch_tab[i].class == p->pc_class)
 430                         return(pci_nomatch_tab[i].desc);
 431         }
 432         return(NULL);
 433 }
 434
 435 static const char *
 436 guess_subclass(struct pci_conf *p)
 437 {
 438         int     i;
 439
 440         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 441                 if ((pci_nomatch_tab[i].class == p->pc_class) &&
 442                     (pci_nomatch_tab[i].subclass == p->pc_subclass))
 443                         return(pci_nomatch_tab[i].desc);
 444         }
 445         return(NULL);
 446 }
 447
 448 static int
 449 load_vendors(void)
 450 {
 451         const char *dbf;
 452         FILE *db;
 453         struct pci_vendor_info *cv;
 454         struct pci_device_info *cd;
 455         char buf[1024], str[1024];
 456         char *ch;
 457         int id, error;
 458
 459         /*
 460          * Locate the database and initialise.
 461          */
 462         TAILQ_INIT(&pci_vendors);
 463         if ((dbf = getenv("PCICONF_VENDOR_DATABASE")) == NULL)
 464                 dbf = _PATH_PCIVDB;
 465         if ((db = fopen(dbf, "r")) == NULL)
 466                 return(1);
 467         cv = NULL;
 468         cd = NULL;
 469         error = 0;
 470
 471         /*
 472          * Scan input lines from the database
 473          */
 474         for (;;) {
 475                 if (fgets(buf, sizeof(buf), db) == NULL)
 476                         break;
 477
 478                 if ((ch = strchr(buf, '#')) != NULL)
 479                         *ch = '\0';
 480                 ch = strchr(buf, '\0') - 1;
 481                 while (ch > buf && isspace(*ch))
 482                         *ch-- = '\0';
 483                 if (ch <= buf)
 484                         continue;
 485
 486                 /* Can't handle subvendor / subdevice entries yet */
 487                 if (buf[0] == '\t' && buf[1] == '\t')
 488                         continue;
 489
 490                 /* Check for vendor entry */
 491                 if (buf[0] != '\t' && sscanf(buf, "%04x %[^\n]", &id, str) == 2) {
 492                         if ((id == 0) || (strlen(str) < 1))
 493                                 continue;
 494                         if ((cv = malloc(sizeof(struct pci_vendor_info))) == NULL) {
 495                                 warn("allocating vendor entry");
 496                                 error = 1;
 497                                 break;
 498                         }
 499                         if ((cv->desc = strdup(str)) == NULL) {
 500                                 free(cv);
 501                                 warn("allocating vendor description");
 502                                 error = 1;
 503                                 break;
 504                         }
 505                         cv->id = id;
 506                         TAILQ_INIT(&cv->devs);
 507                         TAILQ_INSERT_TAIL(&pci_vendors, cv, link);
 508                         continue;
 509                 }
 510
 511                 /* Check for device entry */
 512                 if (buf[0] == '\t' && sscanf(buf + 1, "%04x %[^\n]", &id, str) == 2) {
 513                         if ((id == 0) || (strlen(str) < 1))
 514                                 continue;
 515                         if (cv == NULL) {
 516                                 warnx("device entry with no vendor!");
 517                                 continue;
 518                         }
 519                         if ((cd = malloc(sizeof(struct pci_device_info))) == NULL) {
 520                                 warn("allocating device entry");
 521                                 error = 1;
 522                                 break;
 523                         }
 524                         if ((cd->desc = strdup(str)) == NULL) {
 525                                 free(cd);
 526                                 warn("allocating device description");
 527                                 error = 1;
 528                                 break;
 529                         }
 530                         cd->id = id;
 531                         TAILQ_INSERT_TAIL(&cv->devs, cd, link);
 532                         continue;
 533                 }
 534
 535                 /* It's a comment or junk, ignore it */
 536         }
 537         if (ferror(db))
 538                 error = 1;
 539         fclose(db);
 540
 541         return(error);
 542 }
 543
 544 uint32_t
 545 read_config(int fd, struct pcisel *sel, long reg, int width)
 546 {
 547         struct pci_io pi;
 548
 549         pi.pi_sel = *sel;
 550         pi.pi_reg = reg;
 551         pi.pi_width = width;
 552
 553         if (ioctl(fd, PCIOCREAD, &pi) < 0)
 554                 err(1, "ioctl(PCIOCREAD)");
 555
 556         return (pi.pi_data);
 557 }
 558
 559 static struct pcisel
 560 getsel(const char *str)
 561 {
 562         char *ep = strchr(str, '@');
 563         char *epbase;
 564         struct pcisel sel;
 565         unsigned long selarr[4];
 566         int i;
 567
 568         if (ep == NULL)
 569                 ep = (char *)str;
 570         else
 571                 ep++;
 572
 573         epbase = ep;
 574
 575         if (strncmp(ep, "pci", 3) == 0) {
 576                 ep += 3;
 577                 i = 0;
 578                 do {
 579                         selarr[i++] = strtoul(ep, &ep, 10);
 580                 } while ((*ep == ':' || *ep == '.') && *++ep != '\0' && i < 4);
 581
 582                 if (i > 2)
 583                         sel.pc_func = selarr[--i];
 584                 else
 585                         sel.pc_func = 0;
 586                 sel.pc_dev = selarr[--i];
 587                 sel.pc_bus = selarr[--i];
 588                 if (i > 0)
 589                         sel.pc_domain = selarr[--i];
 590                 else
 591                         sel.pc_domain = 0;
 592         }
 593         if (*ep != '\x0' || ep == epbase)
 594                 errx(1, "cannot parse selector %s", str);
 595         return sel;
 596 }
 597
 598 static void
 599 readone(int fd, struct pcisel *sel, long reg, int width)
 600 {
 601
 602         printf("%0*x", width*2, read_config(fd, sel, reg, width));
 603 }
 604
 605 static void
 606 readit(const char *name, const char *reg, int width)
 607 {
 608         long rstart;
 609         long rend;
 610         long r;
 611         char *end;
 612         int i;
 613         int fd;
 614         struct pcisel sel;
 615
 616         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 617         if (fd < 0)
 618                 err(1, "%s", _PATH_DEVPCI);
 619
 620         rend = rstart = strtol(reg, &end, 0);
 621         if (end && *end == ':') {
 622                 end++;
 623                 rend = strtol(end, (char **) 0, 0);
 624         }
 625         sel = getsel(name);
 626         for (i = 1, r = rstart; r <= rend; i++, r += width) {
 627                 readone(fd, &sel, r, width);
 628                 if (i && !(i % 8))
 629                         putchar(' ');
 630                 putchar(i % (16/width) ? ' ' : '\n');
 631         }
 632         if (i % (16/width) != 1)
 633                 putchar('\n');
 634         close(fd);
 635 }
 636
 637 static void
 638 writeit(const char *name, const char *reg, const char *data, int width)
 639 {
 640         int fd;
 641         struct pci_io pi;
 642
 643         pi.pi_sel = getsel(name);
 644         pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
 645         pi.pi_width = width;
 646         pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
 647
 648         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 649         if (fd < 0)
 650                 err(1, "%s", _PATH_DEVPCI);
 651
 652         if (ioctl(fd, PCIOCWRITE, &pi) < 0)
 653                 err(1, "ioctl(PCIOCWRITE)");
 654 }
 655
 656 static void
 657 chkattached(const char *name)
 658 {
 659         int fd;
 660         struct pci_io pi;
 661
 662         pi.pi_sel = getsel(name);
 663
 664         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 665         if (fd < 0)
 666                 err(1, "%s", _PATH_DEVPCI);
 667
 668         if (ioctl(fd, PCIOCATTACHED, &pi) < 0)
 669                 err(1, "ioctl(PCIOCATTACHED)");
 670
 671         exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */
 672         printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached");
 673 }