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 1.30.2.3.2.1 2009/04/15 03:14:26 kensmith Exp $
  30  */
  31
  32 #include <sys/types.h>
  33 #include <sys/fcntl.h>
  34
  35 #include <ctype.h>
  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 #include "pciconf.h"
  48
  49 struct pci_device_info
  50 {
  51     TAILQ_ENTRY(pci_device_info)        link;
  52     int                                 id;
  53     char                                *desc;
  54 };
  55
  56 struct pci_vendor_info
  57 {
  58     TAILQ_ENTRY(pci_vendor_info)        link;
  59     TAILQ_HEAD(,pci_device_info)        devs;
  60     int                                 id;
  61     char                                *desc;
  62 };
  63
  64 TAILQ_HEAD(,pci_vendor_info)    pci_vendors;
  65
  66 static void list_bars(int fd, struct pci_conf *p);
  67 static void list_devs(int verbose, int bars, int caps);
  68 static void list_verbose(struct pci_conf *p);
  69 static const char *guess_class(struct pci_conf *p);
  70 static const char *guess_subclass(struct pci_conf *p);
  71 static int load_vendors(void);
  72 static void readit(const char *, const char *, int);
  73 static void writeit(const char *, const char *, const char *, int);
  74 static void chkattached(const char *);
  75
  76 static int exitstatus = 0;
  77
  78 static void
  79 usage(void)
  80 {
  81         fprintf(stderr, "%s\n%s\n%s\n%s\n",
  82                 "usage: pciconf -l [-bcv]",
  83                 "       pciconf -a selector",
  84                 "       pciconf -r [-b | -h] selector addr[:addr2]",
  85                 "       pciconf -w [-b | -h] selector addr value");
  86         exit (1);
  87 }
  88
  89 int
  90 main(int argc, char **argv)
  91 {
  92         int c;
  93         int listmode, readmode, writemode, attachedmode, bars, caps, verbose;
  94         int byte, isshort;
  95
  96         listmode = readmode = writemode = attachedmode = bars = caps = verbose = byte = isshort = 0;
  97
  98         while ((c = getopt(argc, argv, "abchlrwv")) != -1) {
  99                 switch(c) {
 100                 case 'a':
 101                         attachedmode = 1;
 102                         break;
 103
 104                 case 'b':
 105                         bars = 1;
 106                         byte = 1;
 107                         break;
 108
 109                 case 'c':
 110                         caps = 1;
 111                         break;
 112
 113                 case 'h':
 114                         isshort = 1;
 115                         break;
 116
 117                 case 'l':
 118                         listmode = 1;
 119                         break;
 120
 121                 case 'r':
 122                         readmode = 1;
 123                         break;
 124
 125                 case 'w':
 126                         writemode = 1;
 127                         break;
 128
 129                 case 'v':
 130                         verbose = 1;
 131                         break;
 132
 133                 default:
 134                         usage();
 135                 }
 136         }
 137
 138         if ((listmode && optind != argc)
 139             || (writemode && optind + 3 != argc)
 140             || (readmode && optind + 2 != argc)
 141             || (attachedmode && optind + 1 != argc))
 142                 usage();
 143
 144         if (listmode) {
 145                 list_devs(verbose, bars, caps);
 146         } else if (attachedmode) {
 147                 chkattached(argv[optind]);
 148         } else if (readmode) {
 149                 readit(argv[optind], argv[optind + 1],
 150                     byte ? 1 : isshort ? 2 : 4);
 151         } else if (writemode) {
 152                 writeit(argv[optind], argv[optind + 1], argv[optind + 2],
 153                     byte ? 1 : isshort ? 2 : 4);
 154         } else {
 155                 usage();
 156         }
 157
 158         return exitstatus;
 159 }
 160
 161 static void
 162 list_devs(int verbose, int bars, int caps)
 163 {
 164         int fd;
 165         struct pci_conf_io pc;
 166         struct pci_conf conf[255], *p;
 167         int none_count = 0;
 168
 169         if (verbose)
 170                 load_vendors();
 171
 172         fd = open(_PATH_DEVPCI, caps ? O_RDWR : O_RDONLY, 0);
 173         if (fd < 0)
 174                 err(1, "%s", _PATH_DEVPCI);
 175
 176         bzero(&pc, sizeof(struct pci_conf_io));
 177         pc.match_buf_len = sizeof(conf);
 178         pc.matches = conf;
 179
 180         do {
 181                 if (ioctl(fd, PCIOCGETCONF, &pc) == -1)
 182                         err(1, "ioctl(PCIOCGETCONF)");
 183
 184                 /*
 185                  * 255 entries should be more than enough for most people,
 186                  * but if someone has more devices, and then changes things
 187                  * around between ioctls, we'll do the cheesy thing and
 188                  * just bail.  The alternative would be to go back to the
 189                  * beginning of the list, and print things twice, which may
 190                  * not be desirable.
 191                  */
 192                 if (pc.status == PCI_GETCONF_LIST_CHANGED) {
 193                         warnx("PCI device list changed, please try again");
 194                         exitstatus = 1;
 195                         close(fd);
 196                         return;
 197                 } else if (pc.status ==  PCI_GETCONF_ERROR) {
 198                         warnx("error returned from PCIOCGETCONF ioctl");
 199                         exitstatus = 1;
 200                         close(fd);
 201                         return;
 202                 }
 203                 for (p = conf; p < &conf[pc.num_matches]; p++) {
 204                         printf("%s%d@pci%d:%d:%d:%d:\tclass=0x%06x card=0x%08x "
 205                             "chip=0x%08x rev=0x%02x hdr=0x%02x\n",
 206                             (p->pd_name && *p->pd_name) ? p->pd_name :
 207                             "none",
 208                             (p->pd_name && *p->pd_name) ? (int)p->pd_unit :
 209                             none_count++, p->pc_sel.pc_domain,
 210                             p->pc_sel.pc_bus, p->pc_sel.pc_dev,
 211                             p->pc_sel.pc_func, (p->pc_class << 16) |
 212                             (p->pc_subclass << 8) | p->pc_progif,
 213                             (p->pc_subdevice << 16) | p->pc_subvendor,
 214                             (p->pc_device << 16) | p->pc_vendor,
 215                             p->pc_revid, p->pc_hdr);
 216                         if (verbose)
 217                                 list_verbose(p);
 218                         if (bars)
 219                                 list_bars(fd, p);
 220                         if (caps)
 221                                 list_caps(fd, p);
 222                 }
 223         } while (pc.status == PCI_GETCONF_MORE_DEVS);
 224
 225         close(fd);
 226 }
 227
 228 static void
 229 list_bars(int fd, struct pci_conf *p)
 230 {
 231         struct pci_bar_io bar;
 232         uint64_t base;
 233         const char *type;
 234         int i, range, max;
 235
 236         switch (p->pc_hdr & PCIM_HDRTYPE) {
 237         case PCIM_HDRTYPE_NORMAL:
 238                 max = PCIR_MAX_BAR_0;
 239                 break;
 240         case PCIM_HDRTYPE_BRIDGE:
 241                 max = PCIR_MAX_BAR_1;
 242                 break;
 243         case PCIM_HDRTYPE_CARDBUS:
 244                 max = PCIR_MAX_BAR_2;
 245                 break;
 246         default:
 247                 return;
 248         }
 249
 250         for (i = 0; i <= max; i++) {
 251                 bar.pbi_sel = p->pc_sel;
 252                 bar.pbi_reg = PCIR_BAR(i);
 253                 if (ioctl(fd, PCIOCGETBAR, &bar) < 0)
 254                         continue;
 255                 if (PCI_BAR_IO(bar.pbi_base)) {
 256                         type = "I/O Port";
 257                         range = 32;
 258                         base = bar.pbi_base & PCIM_BAR_IO_BASE;
 259                 } else {
 260                         if (bar.pbi_base & PCIM_BAR_MEM_PREFETCH)
 261                                 type = "Prefetchable Memory";
 262                         else
 263                                 type = "Memory";
 264                         switch (bar.pbi_base & PCIM_BAR_MEM_TYPE) {
 265                         case PCIM_BAR_MEM_32:
 266                                 range = 32;
 267                                 break;
 268                         case PCIM_BAR_MEM_1MB:
 269                                 range = 20;
 270                                 break;
 271                         case PCIM_BAR_MEM_64:
 272                                 range = 64;
 273                                 break;
 274                         default:
 275                                 range = -1;
 276                         }
 277                         base = bar.pbi_base & ~((uint64_t)0xf);
 278                 }
 279                 printf("    bar   [%02x] = type %s, range %2d, base %#jx, ",
 280                     PCIR_BAR(i), type, range, (uintmax_t)base);
 281                 printf("size %2d, %s\n", (int)bar.pbi_length,
 282                     bar.pbi_enabled ? "enabled" : "disabled");
 283         }
 284 }
 285
 286 static void
 287 list_verbose(struct pci_conf *p)
 288 {
 289         struct pci_vendor_info  *vi;
 290         struct pci_device_info  *di;
 291         const char *dp;
 292
 293         TAILQ_FOREACH(vi, &pci_vendors, link) {
 294                 if (vi->id == p->pc_vendor) {
 295                         printf("    vendor     = '%s'\n", vi->desc);
 296                         break;
 297                 }
 298         }
 299         if (vi == NULL) {
 300                 di = NULL;
 301         } else {
 302                 TAILQ_FOREACH(di, &vi->devs, link) {
 303                         if (di->id == p->pc_device) {
 304                                 printf("    device     = '%s'\n", di->desc);
 305                                 break;
 306                         }
 307                 }
 308         }
 309         if ((dp = guess_class(p)) != NULL)
 310                 printf("    class      = %s\n", dp);
 311         if ((dp = guess_subclass(p)) != NULL)
 312                 printf("    subclass   = %s\n", dp);
 313 }
 314
 315 /*
 316  * This is a direct cut-and-paste from the table in sys/bus/pci/pcireg.h.
 317  */
 318 static struct
 319 {
 320         int     class;
 321         int     subclass;
 322         const char *desc;
 323 } pci_nomatch_tab[] = {
 324         {PCIC_OLD,              -1,                     "old"},
 325         {PCIC_OLD,              PCIS_OLD_NONVGA,        "non-VGA display device"},
 326         {PCIC_OLD,              PCIS_OLD_VGA,           "VGA-compatible display device"},
 327         {PCIC_STORAGE,          -1,                     "mass storage"},
 328         {PCIC_STORAGE,          PCIS_STORAGE_SCSI,      "SCSI"},
 329         {PCIC_STORAGE,          PCIS_STORAGE_IDE,       "ATA"},
 330         {PCIC_STORAGE,          PCIS_STORAGE_FLOPPY,    "floppy disk"},
 331         {PCIC_STORAGE,          PCIS_STORAGE_IPI,       "IPI"},
 332         {PCIC_STORAGE,          PCIS_STORAGE_RAID,      "RAID"},
 333         {PCIC_STORAGE,          PCIS_STORAGE_ATA_ADMA,  "ATA (ADMA)"},
 334         {PCIC_STORAGE,          PCIS_STORAGE_SATA,      "SATA"},
 335         {PCIC_STORAGE,          PCIS_STORAGE_SAS,       "SAS"},
 336         {PCIC_NETWORK,          -1,                     "network"},
 337         {PCIC_NETWORK,          PCIS_NETWORK_ETHERNET,  "ethernet"},
 338         {PCIC_NETWORK,          PCIS_NETWORK_TOKENRING, "token ring"},
 339         {PCIC_NETWORK,          PCIS_NETWORK_FDDI,      "fddi"},
 340         {PCIC_NETWORK,          PCIS_NETWORK_ATM,       "ATM"},
 341         {PCIC_NETWORK,          PCIS_NETWORK_ISDN,      "ISDN"},
 342         {PCIC_DISPLAY,          -1,                     "display"},
 343         {PCIC_DISPLAY,          PCIS_DISPLAY_VGA,       "VGA"},
 344         {PCIC_DISPLAY,          PCIS_DISPLAY_XGA,       "XGA"},
 345         {PCIC_DISPLAY,          PCIS_DISPLAY_3D,        "3D"},
 346         {PCIC_MULTIMEDIA,       -1,                     "multimedia"},
 347         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_VIDEO,  "video"},
 348         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_AUDIO,  "audio"},
 349         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_TELE,   "telephony"},
 350         {PCIC_MULTIMEDIA,       PCIS_MULTIMEDIA_HDA,    "HDA"},
 351         {PCIC_MEMORY,           -1,                     "memory"},
 352         {PCIC_MEMORY,           PCIS_MEMORY_RAM,        "RAM"},
 353         {PCIC_MEMORY,           PCIS_MEMORY_FLASH,      "flash"},
 354         {PCIC_BRIDGE,           -1,                     "bridge"},
 355         {PCIC_BRIDGE,           PCIS_BRIDGE_HOST,       "HOST-PCI"},
 356         {PCIC_BRIDGE,           PCIS_BRIDGE_ISA,        "PCI-ISA"},
 357         {PCIC_BRIDGE,           PCIS_BRIDGE_EISA,       "PCI-EISA"},
 358         {PCIC_BRIDGE,           PCIS_BRIDGE_MCA,        "PCI-MCA"},
 359         {PCIC_BRIDGE,           PCIS_BRIDGE_PCI,        "PCI-PCI"},
 360         {PCIC_BRIDGE,           PCIS_BRIDGE_PCMCIA,     "PCI-PCMCIA"},
 361         {PCIC_BRIDGE,           PCIS_BRIDGE_NUBUS,      "PCI-NuBus"},
 362         {PCIC_BRIDGE,           PCIS_BRIDGE_CARDBUS,    "PCI-CardBus"},
 363         {PCIC_BRIDGE,           PCIS_BRIDGE_RACEWAY,    "PCI-RACEway"},
 364         {PCIC_SIMPLECOMM,       -1,                     "simple comms"},
 365         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_UART,   "UART"},        /* could detect 16550 */
 366         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_PAR,    "parallel port"},
 367         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MULSER, "multiport serial"},
 368         {PCIC_SIMPLECOMM,       PCIS_SIMPLECOMM_MODEM,  "generic modem"},
 369         {PCIC_BASEPERIPH,       -1,                     "base peripheral"},
 370         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_PIC,    "interrupt controller"},
 371         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_DMA,    "DMA controller"},
 372         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_TIMER,  "timer"},
 373         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_RTC,    "realtime clock"},
 374         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_PCIHOT, "PCI hot-plug controller"},
 375         {PCIC_BASEPERIPH,       PCIS_BASEPERIPH_SDHC,   "SD host controller"},
 376         {PCIC_INPUTDEV,         -1,                     "input device"},
 377         {PCIC_INPUTDEV,         PCIS_INPUTDEV_KEYBOARD, "keyboard"},
 378         {PCIC_INPUTDEV,         PCIS_INPUTDEV_DIGITIZER,"digitizer"},
 379         {PCIC_INPUTDEV,         PCIS_INPUTDEV_MOUSE,    "mouse"},
 380         {PCIC_INPUTDEV,         PCIS_INPUTDEV_SCANNER,  "scanner"},
 381         {PCIC_INPUTDEV,         PCIS_INPUTDEV_GAMEPORT, "gameport"},
 382         {PCIC_DOCKING,          -1,                     "docking station"},
 383         {PCIC_PROCESSOR,        -1,                     "processor"},
 384         {PCIC_SERIALBUS,        -1,                     "serial bus"},
 385         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FW,      "FireWire"},
 386         {PCIC_SERIALBUS,        PCIS_SERIALBUS_ACCESS,  "AccessBus"},
 387         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SSA,     "SSA"},
 388         {PCIC_SERIALBUS,        PCIS_SERIALBUS_USB,     "USB"},
 389         {PCIC_SERIALBUS,        PCIS_SERIALBUS_FC,      "Fibre Channel"},
 390         {PCIC_SERIALBUS,        PCIS_SERIALBUS_SMBUS,   "SMBus"},
 391         {PCIC_WIRELESS,         -1,                     "wireless controller"},
 392         {PCIC_WIRELESS,         PCIS_WIRELESS_IRDA,     "iRDA"},
 393         {PCIC_WIRELESS,         PCIS_WIRELESS_IR,       "IR"},
 394         {PCIC_WIRELESS,         PCIS_WIRELESS_RF,       "RF"},
 395         {PCIC_INTELLIIO,        -1,                     "intelligent I/O controller"},
 396         {PCIC_INTELLIIO,        PCIS_INTELLIIO_I2O,     "I2O"},
 397         {PCIC_SATCOM,           -1,                     "satellite communication"},
 398         {PCIC_SATCOM,           PCIS_SATCOM_TV,         "sat TV"},
 399         {PCIC_SATCOM,           PCIS_SATCOM_AUDIO,      "sat audio"},
 400         {PCIC_SATCOM,           PCIS_SATCOM_VOICE,      "sat voice"},
 401         {PCIC_SATCOM,           PCIS_SATCOM_DATA,       "sat data"},
 402         {PCIC_CRYPTO,           -1,                     "encrypt/decrypt"},
 403         {PCIC_CRYPTO,           PCIS_CRYPTO_NETCOMP,    "network/computer crypto"},
 404         {PCIC_CRYPTO,           PCIS_CRYPTO_NETCOMP,    "entertainment crypto"},
 405         {PCIC_DASP,             -1,                     "dasp"},
 406         {PCIC_DASP,             PCIS_DASP_DPIO,         "DPIO module"},
 407         {0, 0,          NULL}
 408 };
 409
 410 static const char *
 411 guess_class(struct pci_conf *p)
 412 {
 413         int     i;
 414
 415         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 416                 if (pci_nomatch_tab[i].class == p->pc_class)
 417                         return(pci_nomatch_tab[i].desc);
 418         }
 419         return(NULL);
 420 }
 421
 422 static const char *
 423 guess_subclass(struct pci_conf *p)
 424 {
 425         int     i;
 426
 427         for (i = 0; pci_nomatch_tab[i].desc != NULL; i++) {
 428                 if ((pci_nomatch_tab[i].class == p->pc_class) &&
 429                     (pci_nomatch_tab[i].subclass == p->pc_subclass))
 430                         return(pci_nomatch_tab[i].desc);
 431         }
 432         return(NULL);
 433 }
 434
 435 static int
 436 load_vendors(void)
 437 {
 438         const char *dbf;
 439         FILE *db;
 440         struct pci_vendor_info *cv;
 441         struct pci_device_info *cd;
 442         char buf[1024], str[1024];
 443         char *ch;
 444         int id, error;
 445
 446         /*
 447          * Locate the database and initialise.
 448          */
 449         TAILQ_INIT(&pci_vendors);
 450         if ((dbf = getenv("PCICONF_VENDOR_DATABASE")) == NULL)
 451                 dbf = _PATH_PCIVDB;
 452         if ((db = fopen(dbf, "r")) == NULL)
 453                 return(1);
 454         cv = NULL;
 455         cd = NULL;
 456         error = 0;
 457
 458         /*
 459          * Scan input lines from the database
 460          */
 461         for (;;) {
 462                 if (fgets(buf, sizeof(buf), db) == NULL)
 463                         break;
 464
 465                 if ((ch = strchr(buf, '#')) != NULL)
 466                         *ch = '\0';
 467                 ch = strchr(buf, '\0') - 1;
 468                 while (ch > buf && isspace(*ch))
 469                         *ch-- = '\0';
 470                 if (ch <= buf)
 471                         continue;
 472
 473                 /* Can't handle subvendor / subdevice entries yet */
 474                 if (buf[0] == '\t' && buf[1] == '\t')
 475                         continue;
 476
 477                 /* Check for vendor entry */
 478                 if (buf[0] != '\t' && sscanf(buf, "%04x %[^\n]", &id, str) == 2) {
 479                         if ((id == 0) || (strlen(str) < 1))
 480                                 continue;
 481                         if ((cv = malloc(sizeof(struct pci_vendor_info))) == NULL) {
 482                                 warn("allocating vendor entry");
 483                                 error = 1;
 484                                 break;
 485                         }
 486                         if ((cv->desc = strdup(str)) == NULL) {
 487                                 free(cv);
 488                                 warn("allocating vendor description");
 489                                 error = 1;
 490                                 break;
 491                         }
 492                         cv->id = id;
 493                         TAILQ_INIT(&cv->devs);
 494                         TAILQ_INSERT_TAIL(&pci_vendors, cv, link);
 495                         continue;
 496                 }
 497
 498                 /* Check for device entry */
 499                 if (buf[0] == '\t' && sscanf(buf + 1, "%04x %[^\n]", &id, str) == 2) {
 500                         if ((id == 0) || (strlen(str) < 1))
 501                                 continue;
 502                         if (cv == NULL) {
 503                                 warnx("device entry with no vendor!");
 504                                 continue;
 505                         }
 506                         if ((cd = malloc(sizeof(struct pci_device_info))) == NULL) {
 507                                 warn("allocating device entry");
 508                                 error = 1;
 509                                 break;
 510                         }
 511                         if ((cd->desc = strdup(str)) == NULL) {
 512                                 free(cd);
 513                                 warn("allocating device description");
 514                                 error = 1;
 515                                 break;
 516                         }
 517                         cd->id = id;
 518                         TAILQ_INSERT_TAIL(&cv->devs, cd, link);
 519                         continue;
 520                 }
 521
 522                 /* It's a comment or junk, ignore it */
 523         }
 524         if (ferror(db))
 525                 error = 1;
 526         fclose(db);
 527
 528         return(error);
 529 }
 530
 531 uint32_t
 532 read_config(int fd, struct pcisel *sel, long reg, int width)
 533 {
 534         struct pci_io pi;
 535
 536         pi.pi_sel = *sel;
 537         pi.pi_reg = reg;
 538         pi.pi_width = width;
 539
 540         if (ioctl(fd, PCIOCREAD, &pi) < 0)
 541                 err(1, "ioctl(PCIOCREAD)");
 542
 543         return (pi.pi_data);
 544 }
 545
 546 static struct pcisel
 547 getsel(const char *str)
 548 {
 549         char *ep = strchr(str, '@');
 550         char *epbase;
 551         struct pcisel sel = {0,0,0,0};
 552         unsigned long selarr[4];
 553         int i;
 554
 555         if (ep == NULL)
 556                 ep = __DECONST(char *, str);
 557         else
 558                 ep++;
 559
 560         epbase = ep;
 561
 562         if (strncmp(ep, "pci", 3) == 0) {
 563                 ep += 3;
 564                 i = 0;
 565                 do {
 566                         selarr[i++] = strtoul(ep, &ep, 10);
 567                 } while ((*ep == ':' || *ep == '.') && *++ep != '\0' && i < 4);
 568
 569                 if (i > 2)
 570                         sel.pc_func = selarr[--i];
 571                 else
 572                         sel.pc_func = 0;
 573                 sel.pc_dev = selarr[--i];
 574                 sel.pc_bus = selarr[--i];
 575                 if (i > 0)
 576                         sel.pc_domain = selarr[--i];
 577                 else
 578                         sel.pc_domain = 0;
 579         }
 580         if (*ep != '\x0' || ep == epbase)
 581                 errx(1, "cannot parse selector %s", str);
 582         return sel;
 583 }
 584
 585 static void
 586 readone(int fd, struct pcisel *sel, long reg, int width)
 587 {
 588
 589         printf("%0*x", width*2, read_config(fd, sel, reg, width));
 590 }
 591
 592 static void
 593 readit(const char *name, const char *reg, int width)
 594 {
 595         long rstart;
 596         long rend;
 597         long r;
 598         char *end;
 599         int i;
 600         int fd;
 601         struct pcisel sel;
 602
 603         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 604         if (fd < 0)
 605                 err(1, "%s", _PATH_DEVPCI);
 606
 607         rend = rstart = strtol(reg, &end, 0);
 608         if (end && *end == ':') {
 609                 end++;
 610                 rend = strtol(end, (char **) 0, 0);
 611         }
 612         sel = getsel(name);
 613         for (i = 1, r = rstart; r <= rend; i++, r += width) {
 614                 readone(fd, &sel, r, width);
 615                 if (i && !(i % 8))
 616                         putchar(' ');
 617                 putchar(i % (16/width) ? ' ' : '\n');
 618         }
 619         if (i % (16/width) != 1)
 620                 putchar('\n');
 621         close(fd);
 622 }
 623
 624 static void
 625 writeit(const char *name, const char *reg, const char *data, int width)
 626 {
 627         int fd;
 628         struct pci_io pi;
 629
 630         pi.pi_sel = getsel(name);
 631         pi.pi_reg = strtoul(reg, (char **)0, 0); /* XXX error check */
 632         pi.pi_width = width;
 633         pi.pi_data = strtoul(data, (char **)0, 0); /* XXX error check */
 634
 635         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 636         if (fd < 0)
 637                 err(1, "%s", _PATH_DEVPCI);
 638
 639         if (ioctl(fd, PCIOCWRITE, &pi) < 0)
 640                 err(1, "ioctl(PCIOCWRITE)");
 641 }
 642
 643 static void
 644 chkattached(const char *name)
 645 {
 646         int fd;
 647         struct pci_io pi;
 648
 649         pi.pi_sel = getsel(name);
 650
 651         fd = open(_PATH_DEVPCI, O_RDWR, 0);
 652         if (fd < 0)
 653                 err(1, "%s", _PATH_DEVPCI);
 654
 655         if (ioctl(fd, PCIOCATTACHED, &pi) < 0)
 656                 err(1, "ioctl(PCIOCATTACHED)");
 657
 658         exitstatus = pi.pi_data ? 0 : 2; /* exit(2), if NOT attached */
 659         printf("%s: %s%s\n", name, pi.pi_data == 0 ? "not " : "", "attached");
 660 }