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