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