setpci.c

   1 /*
   2  *      The PCI Utilities -- Manipulate PCI Configuration Registers
   3  *
   4  *      Copyright (c) 1998--2008 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <stdlib.h>
  12 #include <stdarg.h>
  13 #include <errno.h>
  14
  15 #define PCIUTILS_SETPCI
  16 #include "pciutils.h"
  17
  18 static int force;                       /* Don't complain if no devices match */
  19 static int verbose;                     /* Verbosity level */
  20 static int demo_mode;                   /* Only show */
  21
  22 const char program_name[] = "setpci";
  23
  24 static struct pci_access *pacc;
  25
  26 struct value {
  27   unsigned int value;
  28   unsigned int mask;
  29 };
  30
  31 struct op {
  32   struct op *next;
  33   struct pci_dev **dev_vector;
  34   u16 cap_type;                         /* PCI_CAP_xxx or 0 */
  35   u16 cap_id;
  36   unsigned int addr;
  37   unsigned int width;                   /* Byte width of the access */
  38   unsigned int num_values;              /* Number of values to write; 0=read */
  39   struct value values[0];
  40 };
  41
  42 static struct op *first_op, **last_op = &first_op;
  43 static unsigned int max_values[] = { 0, 0xff, 0xffff, 0, 0xffffffff };
  44
  45 static struct pci_dev **
  46 select_devices(struct pci_filter *filt)
  47 {
  48   struct pci_dev *z, **a, **b;
  49   int cnt = 1;
  50
  51   for (z=pacc->devices; z; z=z->next)
  52     if (pci_filter_match(filt, z))
  53       cnt++;
  54   a = b = xmalloc(sizeof(struct device *) * cnt);
  55   for (z=pacc->devices; z; z=z->next)
  56     if (pci_filter_match(filt, z))
  57       *a++ = z;
  58   *a = NULL;
  59   return b;
  60 }
  61
  62 static void PCI_PRINTF(1,2)
  63 trace(const char *fmt, ...)
  64 {
  65   va_list args;
  66   va_start(args, fmt);
  67   if (verbose)
  68     vprintf(fmt, args);
  69   va_end(args);
  70 }
  71
  72 static void
  73 exec_op(struct op *op, struct pci_dev *dev)
  74 {
  75   const char * const formats[] = { NULL, " %02x", " %04x", NULL, " %08x" };
  76   const char * const mask_formats[] = { NULL, " %02x->(%02x:%02x)->%02x", " %04x->(%04x:%04x)->%04x", NULL, " %08x->(%08x:%08x)->%08x" };
  77   unsigned int i, x, y;
  78   int addr = 0;
  79   int width = op->width;
  80   char slot[16];
  81
  82   sprintf(slot, "%04x:%02x:%02x.%x", dev->domain, dev->bus, dev->dev, dev->func);
  83   trace("%s ", slot);
  84   if (op->cap_type)
  85     {
  86       struct pci_cap *cap;
  87       cap = pci_find_cap(dev, op->cap_id, op->cap_type);
  88       if (cap)
  89         addr = cap->addr;
  90       else
  91         die("%s: %s %04x not found", slot, ((op->cap_type == PCI_CAP_NORMAL) ? "Capability" : "Extended capability"), op->cap_id);
  92       trace(((op->cap_type == PCI_CAP_NORMAL) ? "(cap %02x @%02x) " : "(ecap %04x @%03x) "), op->cap_id, addr);
  93     }
  94   addr += op->addr;
  95   trace("@%02x", addr);
  96
  97   /* We have already checked it when parsing, but addressing relative to capabilities can change the address. */
  98   if (addr & (width-1))
  99     die("%s: Unaligned access of width %d to register %04x", slot, width, addr);
 100   if (addr + width > 0x1000)
 101     die("%s: Access of width %d to register %04x out of range", slot, width, addr);
 102
 103   if (op->num_values)
 104     {
 105       for (i=0; i<op->num_values; i++)
 106         {
 107           if ((op->values[i].mask & max_values[width]) == max_values[width])
 108             {
 109               x = op->values[i].value;
 110               trace(formats[width], op->values[i].value);
 111             }
 112           else
 113             {
 114               switch (width)
 115                 {
 116                 case 1:
 117                   y = pci_read_byte(dev, addr);
 118                   break;
 119                 case 2:
 120                   y = pci_read_word(dev, addr);
 121                   break;
 122                 default:
 123                   y = pci_read_long(dev, addr);
 124                   break;
 125                 }
 126               x = (y & ~op->values[i].mask) | op->values[i].value;
 127               trace(mask_formats[width], y, op->values[i].value, op->values[i].mask, x);
 128             }
 129           if (!demo_mode)
 130             {
 131               switch (width)
 132                 {
 133                 case 1:
 134                   pci_write_byte(dev, addr, x);
 135                   break;
 136                 case 2:
 137                   pci_write_word(dev, addr, x);
 138                   break;
 139                 default:
 140                   pci_write_long(dev, addr, x);
 141                   break;
 142                 }
 143             }
 144           addr += width;
 145         }
 146       trace("\n");
 147     }
 148   else
 149     {
 150       trace(" = ");
 151       switch (width)
 152         {
 153         case 1:
 154           x = pci_read_byte(dev, addr);
 155           break;
 156         case 2:
 157           x = pci_read_word(dev, addr);
 158           break;
 159         default:
 160           x = pci_read_long(dev, addr);
 161           break;
 162         }
 163       printf(formats[width]+1, x);
 164       putchar('\n');
 165     }
 166 }
 167
 168 static void
 169 execute(struct op *op)
 170 {
 171   struct pci_dev **vec = NULL;
 172   struct pci_dev **pdev, *dev;
 173   struct op *oops;
 174
 175   while (op)
 176     {
 177       pdev = vec = op->dev_vector;
 178       while (dev = *pdev++)
 179         for (oops=op; oops && oops->dev_vector == vec; oops=oops->next)
 180           exec_op(oops, dev);
 181       while (op && op->dev_vector == vec)
 182         op = op->next;
 183     }
 184 }
 185
 186 static void
 187 scan_ops(struct op *op)
 188 {
 189   if (demo_mode)
 190     return;
 191   while (op)
 192     {
 193       if (op->num_values)
 194         pacc->writeable = 1;
 195       op = op->next;
 196     }
 197 }
 198
 199 struct reg_name {
 200   unsigned int cap;
 201   unsigned int offset;
 202   unsigned int width;
 203   const char *name;
 204 };
 205
 206 static const struct reg_name pci_reg_names[] = {
 207   {       0, 0x00, 2, "VENDOR_ID" },
 208   {       0, 0x02, 2, "DEVICE_ID" },
 209   {       0, 0x04, 2, "COMMAND" },
 210   {       0, 0x06, 2, "STATUS" },
 211   {       0, 0x08, 1, "REVISION" },
 212   {       0, 0x09, 1, "CLASS_PROG" },
 213   {       0, 0x0a, 2, "CLASS_DEVICE" },
 214   {       0, 0x0c, 1, "CACHE_LINE_SIZE" },
 215   {       0, 0x0d, 1, "LATENCY_TIMER" },
 216   {       0, 0x0e, 1, "HEADER_TYPE" },
 217   {       0, 0x0f, 1, "BIST" },
 218   {       0, 0x10, 4, "BASE_ADDRESS_0" },
 219   {       0, 0x14, 4, "BASE_ADDRESS_1" },
 220   {       0, 0x18, 4, "BASE_ADDRESS_2" },
 221   {       0, 0x1c, 4, "BASE_ADDRESS_3" },
 222   {       0, 0x20, 4, "BASE_ADDRESS_4" },
 223   {       0, 0x24, 4, "BASE_ADDRESS_5" },
 224   {       0, 0x28, 4, "CARDBUS_CIS" },
 225   {       0, 0x2c, 2, "SUBSYSTEM_VENDOR_ID" },
 226   {       0, 0x2e, 2, "SUBSYSTEM_ID" },
 227   {       0, 0x30, 4, "ROM_ADDRESS" },
 228   {       0, 0x3c, 1, "INTERRUPT_LINE" },
 229   {       0, 0x3d, 1, "INTERRUPT_PIN" },
 230   {       0, 0x3e, 1, "MIN_GNT" },
 231   {       0, 0x3f, 1, "MAX_LAT" },
 232   {       0, 0x18, 1, "PRIMARY_BUS" },
 233   {       0, 0x19, 1, "SECONDARY_BUS" },
 234   {       0, 0x1a, 1, "SUBORDINATE_BUS" },
 235   {       0, 0x1b, 1, "SEC_LATENCY_TIMER" },
 236   {       0, 0x1c, 1, "IO_BASE" },
 237   {       0, 0x1d, 1, "IO_LIMIT" },
 238   {       0, 0x1e, 2, "SEC_STATUS" },
 239   {       0, 0x20, 2, "MEMORY_BASE" },
 240   {       0, 0x22, 2, "MEMORY_LIMIT" },
 241   {       0, 0x24, 2, "PREF_MEMORY_BASE" },
 242   {       0, 0x26, 2, "PREF_MEMORY_LIMIT" },
 243   {       0, 0x28, 4, "PREF_BASE_UPPER32" },
 244   {       0, 0x2c, 4, "PREF_LIMIT_UPPER32" },
 245   {       0, 0x30, 2, "IO_BASE_UPPER16" },
 246   {       0, 0x32, 2, "IO_LIMIT_UPPER16" },
 247   {       0, 0x38, 4, "BRIDGE_ROM_ADDRESS" },
 248   {       0, 0x3e, 2, "BRIDGE_CONTROL" },
 249   {       0, 0x10, 4, "CB_CARDBUS_BASE" },
 250   {       0, 0x14, 2, "CB_CAPABILITIES" },
 251   {       0, 0x16, 2, "CB_SEC_STATUS" },
 252   {       0, 0x18, 1, "CB_BUS_NUMBER" },
 253   {       0, 0x19, 1, "CB_CARDBUS_NUMBER" },
 254   {       0, 0x1a, 1, "CB_SUBORDINATE_BUS" },
 255   {       0, 0x1b, 1, "CB_CARDBUS_LATENCY" },
 256   {       0, 0x1c, 4, "CB_MEMORY_BASE_0" },
 257   {       0, 0x20, 4, "CB_MEMORY_LIMIT_0" },
 258   {       0, 0x24, 4, "CB_MEMORY_BASE_1" },
 259   {       0, 0x28, 4, "CB_MEMORY_LIMIT_1" },
 260   {       0, 0x2c, 2, "CB_IO_BASE_0" },
 261   {       0, 0x2e, 2, "CB_IO_BASE_0_HI" },
 262   {       0, 0x30, 2, "CB_IO_LIMIT_0" },
 263   {       0, 0x32, 2, "CB_IO_LIMIT_0_HI" },
 264   {       0, 0x34, 2, "CB_IO_BASE_1" },
 265   {       0, 0x36, 2, "CB_IO_BASE_1_HI" },
 266   {       0, 0x38, 2, "CB_IO_LIMIT_1" },
 267   {       0, 0x3a, 2, "CB_IO_LIMIT_1_HI" },
 268   {       0, 0x40, 2, "CB_SUBSYSTEM_VENDOR_ID" },
 269   {       0, 0x42, 2, "CB_SUBSYSTEM_ID" },
 270   {       0, 0x44, 4, "CB_LEGACY_MODE_BASE" },
 271   { 0x10001,    0, 0, "CAP_PM" },
 272   { 0x10002,    0, 0, "CAP_AGP" },
 273   { 0x10003,    0, 0, "CAP_VPD" },
 274   { 0x10004,    0, 0, "CAP_SLOTID" },
 275   { 0x10005,    0, 0, "CAP_MSI" },
 276   { 0x10006,    0, 0, "CAP_CHSWP" },
 277   { 0x10007,    0, 0, "CAP_PCIX" },
 278   { 0x10008,    0, 0, "CAP_HT" },
 279   { 0x10009,    0, 0, "CAP_VNDR" },
 280   { 0x1000a,    0, 0, "CAP_DBG" },
 281   { 0x1000b,    0, 0, "CAP_CCRC" },
 282   { 0x1000c,    0, 0, "CAP_HOTPLUG" },
 283   { 0x1000d,    0, 0, "CAP_SSVID" },
 284   { 0x1000e,    0, 0, "CAP_AGP3" },
 285   { 0x1000f,    0, 0, "CAP_SECURE" },
 286   { 0x10010,    0, 0, "CAP_EXP" },
 287   { 0x10011,    0, 0, "CAP_MSIX" },
 288   { 0x10012,    0, 0, "CAP_SATA" },
 289   { 0x10013,    0, 0, "CAP_AF" },
 290   { 0x20001,    0, 0, "ECAP_AER" },
 291   { 0x20002,    0, 0, "ECAP_VC" },
 292   { 0x20003,    0, 0, "ECAP_DSN" },
 293   { 0x20004,    0, 0, "ECAP_PB" },
 294   { 0x20005,    0, 0, "ECAP_RCLINK" },
 295   { 0x20006,    0, 0, "ECAP_RCILINK" },
 296   { 0x20007,    0, 0, "ECAP_RCECOLL" },
 297   { 0x20008,    0, 0, "ECAP_MFVC" },
 298   { 0x2000a,    0, 0, "ECAP_RBCB" },
 299   { 0x2000b,    0, 0, "ECAP_VNDR" },
 300   { 0x2000d,    0, 0, "ECAP_ACS" },
 301   { 0x2000e,    0, 0, "ECAP_ARI" },
 302   { 0x2000f,    0, 0, "ECAP_ATS" },
 303   { 0x20010,    0, 0, "ECAP_SRIOV" },
 304   { 0x2001d,    0, 0, "ECAP_DPC" },
 305   {       0,    0, 0, NULL }
 306 };
 307
 308 static void
 309 dump_registers(void)
 310 {
 311   const struct reg_name *r;
 312
 313   printf("cap pos w name\n");
 314   for (r = pci_reg_names; r->name; r++)
 315     {
 316       if (r->cap >= 0x20000)
 317         printf("%04x", r->cap - 0x20000);
 318       else if (r->cap)
 319         printf("  %02x", r->cap - 0x10000);
 320       else
 321         printf("    ");
 322       printf(" %02x %c %s\n", r->offset, "-BW?L"[r->width], r->name);
 323     }
 324 }
 325
 326 static void NONRET
 327 usage(void)
 328 {
 329   fprintf(stderr,
 330 "Usage: setpci [<options>] (<device>+ <reg>[=<values>]*)*\n"
 331 "\n"
 332 "General options:\n"
 333 "-f\t\tDon't complain if there's nothing to do\n"
 334 "-v\t\tBe verbose\n"
 335 "-D\t\tList changes, don't commit them\n"
 336 "--dumpregs\tDump all known register names and exit\n"
 337 "\n"
 338 "PCI access options:\n"
 339 GENERIC_HELP
 340 "\n"
 341 "Setting commands:\n"
 342 "<device>:\t-s [[[<domain>]:][<bus>]:][<slot>][.[<func>]]\n"
 343 "\t\t-d [<vendor>]:[<device>]\n"
 344 "<reg>:\t\t<base>[+<offset>][.(B|W|L)]\n"
 345 "<base>:\t\t<address>\n"
 346 "\t\t<named-register>\n"
 347 "\t\t[E]CAP_<capability-name>\n"
 348 "\t\t[E]CAP<capability-number>\n"
 349 "<values>:\t<value>[,<value>...]\n"
 350 "<value>:\t<hex>\n"
 351 "\t\t<hex>:<mask>\n");
 352   exit(0);
 353 }
 354
 355 static void NONRET PCI_PRINTF(1,2)
 356 parse_err(const char *msg, ...)
 357 {
 358   va_list args;
 359   va_start(args, msg);
 360   fprintf(stderr, "setpci: ");
 361   vfprintf(stderr, msg, args);
 362   fprintf(stderr, ".\nTry `setpci --help' for more information.\n");
 363   exit(1);
 364 }
 365
 366 static int
 367 parse_options(int argc, char **argv)
 368 {
 369   const char opts[] = GENERIC_OPTIONS;
 370   int i=1;
 371
 372   if (argc == 2)
 373     {
 374       if (!strcmp(argv[1], "--help"))
 375         usage();
 376       if (!strcmp(argv[1], "--version"))
 377         {
 378           puts("setpci version " PCIUTILS_VERSION);
 379           exit(0);
 380         }
 381       if (!strcmp(argv[1], "--dumpregs"))
 382         {
 383           dump_registers();
 384           exit(0);
 385         }
 386     }
 387
 388   while (i < argc && argv[i][0] == '-')
 389     {
 390       char *c = argv[i++] + 1;
 391       char *d = c;
 392       char *e;
 393       while (*c)
 394         switch (*c)
 395           {
 396           case 0:
 397             break;
 398           case 'v':
 399             verbose++;
 400             c++;
 401             break;
 402           case 'f':
 403             force++;
 404             c++;
 405             break;
 406           case 'D':
 407             demo_mode++;
 408             c++;
 409             break;
 410           default:
 411             if (e = strchr(opts, *c))
 412               {
 413                 char *arg;
 414                 c++;
 415                 if (e[1] == ':')
 416                   {
 417                     if (*c)
 418                       arg = c;
 419                     else if (i < argc)
 420                       arg = argv[i++];
 421                     else
 422                       parse_err("Option -%c requires an argument", *e);
 423                     c = "";
 424                   }
 425                 else
 426                   arg = NULL;
 427                 if (!parse_generic_option(*e, pacc, arg))
 428                   parse_err("Unable to parse option -%c", *e);
 429               }
 430             else
 431               {
 432                 if (c != d)
 433                   parse_err("Invalid or misplaced option -%c", *c);
 434                 return i-1;
 435               }
 436           }
 437     }
 438
 439   return i;
 440 }
 441
 442 static int parse_filter(int argc, char **argv, int i, struct pci_filter *filter)
 443 {
 444   char *c = argv[i++];
 445   char *d;
 446
 447   if (!c[1] || !strchr("sd", c[1]))
 448     parse_err("Invalid option -%c", c[1]);
 449   if (c[2])
 450     d = (c[2] == '=') ? c+3 : c+2;
 451   else if (i < argc)
 452     d = argv[i++];
 453   else
 454     parse_err("Option -%c requires an argument", c[1]);
 455   switch (c[1])
 456     {
 457     case 's':
 458       if (d = pci_filter_parse_slot(filter, d))
 459         parse_err("Unable to parse filter -s %s", d);
 460       break;
 461     case 'd':
 462       if (d = pci_filter_parse_id(filter, d))
 463         parse_err("Unable to parse filter -d %s", d);
 464       break;
 465     default:
 466       parse_err("Unknown filter option -%c", c[1]);
 467     }
 468
 469   return i;
 470 }
 471
 472 static const struct reg_name *parse_reg_name(char *name)
 473 {
 474   const struct reg_name *r;
 475
 476   for (r = pci_reg_names; r->name; r++)
 477     if (!strcasecmp(r->name, name))
 478       return r;
 479   return NULL;
 480 }
 481
 482 static int parse_x32(char *c, char **stopp, unsigned int *resp)
 483 {
 484   char *stop;
 485   unsigned long int l;
 486
 487   if (!*c)
 488     return -1;
 489   errno = 0;
 490   l = strtoul(c, &stop, 16);
 491   if (errno)
 492     return -1;
 493   if ((l & ~0U) != l)
 494     return -1;
 495   *resp = l;
 496   if (*stop)
 497     {
 498       if (stopp)
 499         *stopp = stop;
 500       return 0;
 501     }
 502   else
 503     {
 504       if (stopp)
 505         *stopp = NULL;
 506       return 1;
 507     }
 508 }
 509
 510 static void parse_register(struct op *op, char *base)
 511 {
 512   const struct reg_name *r;
 513   unsigned int cap;
 514
 515   op->cap_type = op->cap_id = 0;
 516   if (parse_x32(base, NULL, &op->addr) > 0)
 517     return;
 518   else if (r = parse_reg_name(base))
 519     {
 520       switch (r->cap & 0xff0000)
 521         {
 522         case 0x10000:
 523           op->cap_type = PCI_CAP_NORMAL;
 524           break;
 525         case 0x20000:
 526           op->cap_type = PCI_CAP_EXTENDED;
 527           break;
 528         }
 529       op->cap_id = r->cap & 0xffff;
 530       op->addr = r->offset;
 531       if (r->width && !op->width)
 532         op->width = r->width;
 533       return;
 534     }
 535   else if (!strncasecmp(base, "CAP", 3))
 536     {
 537       if (parse_x32(base+3, NULL, &cap) > 0 && cap < 0x100)
 538         {
 539           op->cap_type = PCI_CAP_NORMAL;
 540           op->cap_id = cap;
 541           op->addr = 0;
 542           return;
 543         }
 544     }
 545   else if (!strncasecmp(base, "ECAP", 4))
 546     {
 547       if (parse_x32(base+4, NULL, &cap) > 0 && cap < 0x1000)
 548         {
 549           op->cap_type = PCI_CAP_EXTENDED;
 550           op->cap_id = cap;
 551           op->addr = 0;
 552           return;
 553         }
 554     }
 555   parse_err("Unknown register \"%s\"", base);
 556 }
 557
 558 static void parse_op(char *c, struct pci_dev **selected_devices)
 559 {
 560   char *base, *offset, *width, *value;
 561   char *e, *f;
 562   int n, j;
 563   struct op *op;
 564
 565   /* Split the argument */
 566   base = xstrdup(c);
 567   if (value = strchr(base, '='))
 568     *value++ = 0;
 569   if (width = strchr(base, '.'))
 570     *width++ = 0;
 571   if (offset = strchr(base, '+'))
 572     *offset++ = 0;
 573
 574   /* Look for setting of values and count how many */
 575   n = 0;
 576   if (value)
 577     {
 578       if (!*value)
 579         parse_err("Missing value");
 580       n++;
 581       for (e=value; *e; e++)
 582         if (*e == ',')
 583           n++;
 584     }
 585
 586   /* Allocate the operation */
 587   op = xmalloc(sizeof(struct op) + n*sizeof(struct value));
 588   op->dev_vector = selected_devices;
 589   op->num_values = n;
 590
 591   /* What is the width suffix? */
 592   if (width)
 593     {
 594       if (width[1])
 595         parse_err("Invalid width \"%s\"", width);
 596       switch (*width & 0xdf)
 597         {
 598         case 'B':
 599           op->width = 1; break;
 600         case 'W':
 601           op->width = 2; break;
 602         case 'L':
 603           op->width = 4; break;
 604         default:
 605           parse_err("Invalid width \"%c\"", *width);
 606         }
 607     }
 608   else
 609     op->width = 0;
 610
 611   /* Find the register */
 612   parse_register(op, base);
 613   if (!op->width)
 614     parse_err("Missing width");
 615
 616   /* Add offset */
 617   if (offset)
 618     {
 619       unsigned int off;
 620       if (parse_x32(offset, NULL, &off) <= 0 || off >= 0x1000)
 621         parse_err("Invalid offset \"%s\"", offset);
 622       op->addr += off;
 623     }
 624
 625   /* Check range */
 626   if (op->addr >= 0x1000 || op->addr + op->width*(n ? n : 1) > 0x1000)
 627     parse_err("Register number %02x out of range", op->addr);
 628   if (op->addr & (op->width - 1))
 629     parse_err("Unaligned register address %02x", op->addr);
 630
 631   /* Parse the values */
 632   for (j=0; j<n; j++)
 633     {
 634       unsigned int ll, lim;
 635       e = strchr(value, ',');
 636       if (e)
 637         *e++ = 0;
 638       if (parse_x32(value, &f, &ll) < 0 || f && *f != ':')
 639         parse_err("Invalid value \"%s\"", value);
 640       lim = max_values[op->width];
 641       if (ll > lim && ll < ~0U - lim)
 642         parse_err("Value \"%s\" is out of range", value);
 643       op->values[j].value = ll;
 644       if (f && *f == ':')
 645         {
 646           if (parse_x32(f+1, NULL, &ll) <= 0)
 647             parse_err("Invalid mask \"%s\"", f+1);
 648           if (ll > lim && ll < ~0U - lim)
 649             parse_err("Mask \"%s\" is out of range", f+1);
 650           op->values[j].mask = ll;
 651           op->values[j].value &= ll;
 652         }
 653       else
 654         op->values[j].mask = ~0U;
 655       value = e;
 656     }
 657
 658   *last_op = op;
 659   last_op = &op->next;
 660   op->next = NULL;
 661 }
 662
 663 static void parse_ops(int argc, char **argv, int i)
 664 {
 665   enum { STATE_INIT, STATE_GOT_FILTER, STATE_GOT_OP } state = STATE_INIT;
 666   struct pci_filter filter;
 667   struct pci_dev **selected_devices = NULL;
 668
 669   while (i < argc)
 670     {
 671       char *c = argv[i++];
 672
 673       if (*c == '-')
 674         {
 675           if (state != STATE_GOT_FILTER)
 676             pci_filter_init(pacc, &filter);
 677           i = parse_filter(argc, argv, i-1, &filter);
 678           state = STATE_GOT_FILTER;
 679         }
 680       else
 681         {
 682           if (state == STATE_INIT)
 683             parse_err("Filter specification expected");
 684           if (state == STATE_GOT_FILTER)
 685             selected_devices = select_devices(&filter);
 686           if (!selected_devices[0] && !force)
 687             fprintf(stderr, "setpci: Warning: No devices selected for \"%s\".\n", c);
 688           parse_op(c, selected_devices);
 689           state = STATE_GOT_OP;
 690         }
 691     }
 692   if (state == STATE_INIT)
 693     parse_err("No operation specified");
 694 }
 695
 696 int
 697 main(int argc, char **argv)
 698 {
 699   int i;
 700
 701   pacc = pci_alloc();
 702   pacc->error = die;
 703   i = parse_options(argc, argv);
 704
 705   pci_init(pacc);
 706   pci_scan_bus(pacc);
 707
 708   parse_ops(argc, argv, i);
 709   scan_ops(first_op);
 710   execute(first_op);
 711
 712   return 0;
 713 }