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 <unistd.h>
  14 #include <errno.h>
  15
  16 #define PCIUTILS_SETPCI
  17 #include "pciutils.h"
  18
  19 static int force;                       /* Don't complain if no devices match */
  20 static int verbose;                     /* Verbosity level */
  21 static int demo_mode;                   /* Only show */
  22
  23 const char program_name[] = "setpci";
  24
  25 static struct pci_access *pacc;
  26
  27 struct value {
  28   unsigned int value;
  29   unsigned int mask;
  30 };
  31
  32 struct op {
  33   struct op *next;
  34   struct pci_dev **dev_vector;
  35   u16 cap_type;                         /* PCI_CAP_xxx or 0 */
  36   u16 cap_id;
  37   unsigned int addr;
  38   unsigned int width;                   /* Byte width of the access */
  39   unsigned int num_values;              /* Number of values to write; 0=read */
  40   struct value values[0];
  41 };
  42
  43 static struct op *first_op, **last_op = &first_op;
  44 static unsigned int max_values[] = { 0, 0xff, 0xffff, 0, 0xffffffff };
  45
  46 static struct pci_dev **
  47 select_devices(struct pci_filter *filt)
  48 {
  49   struct pci_dev *z, **a, **b;
  50   int cnt = 1;
  51
  52   for (z=pacc->devices; z; z=z->next)
  53     if (pci_filter_match(filt, z))
  54       cnt++;
  55   a = b = xmalloc(sizeof(struct device *) * cnt);
  56   for (z=pacc->devices; z; z=z->next)
  57     if (pci_filter_match(filt, z))
  58       *a++ = z;
  59   *a = NULL;
  60   return b;
  61 }
  62
  63 static void PCI_PRINTF(1,2)
  64 trace(const char *fmt, ...)
  65 {
  66   va_list args;
  67   va_start(args, fmt);
  68   if (verbose)
  69     vprintf(fmt, args);
  70   va_end(args);
  71 }
  72
  73 static void
  74 exec_op(struct op *op, struct pci_dev *dev)
  75 {
  76   const char * const formats[] = { NULL, " %02x", " %04x", NULL, " %08x" };
  77   const char * const mask_formats[] = { NULL, " %02x->(%02x:%02x)->%02x", " %04x->(%04x:%04x)->%04x", NULL, " %08x->(%08x:%08x)->%08x" };
  78   unsigned int i, x, y;
  79   int addr = 0;
  80   int width = op->width;
  81   char slot[16];
  82
  83   sprintf(slot, "%04x:%02x:%02x.%x", dev->domain, dev->bus, dev->dev, dev->func);
  84   trace("%s ", slot);
  85   if (op->cap_type)
  86     {
  87       struct pci_cap *cap;
  88       cap = pci_find_cap(dev, op->cap_id, op->cap_type);
  89       if (cap)
  90         addr = cap->addr;
  91       else
  92         die("%s: %s %04x not found", slot, ((op->cap_type == PCI_CAP_NORMAL) ? "Capability" : "Extended capability"), op->cap_id);
  93       trace(((op->cap_type == PCI_CAP_NORMAL) ? "(cap %02x @%02x) " : "(ecap %04x @%03x) "), op->cap_id, addr);
  94     }
  95   addr += op->addr;
  96   trace("@%02x", addr);
  97
  98   /* We have already checked it when parsing, but addressing relative to capabilities can change the address. */
  99   if (addr & (width-1))
 100     die("%s: Unaligned access of width %d to register %04x", slot, width, addr);
 101   if (addr + width > 0x1000)
 102     die("%s: Access of width %d to register %04x out of range", slot, width, addr);
 103
 104   if (op->num_values)
 105     {
 106       for (i=0; i<op->num_values; i++)
 107         {
 108           if ((op->values[i].mask & max_values[width]) == max_values[width])
 109             {
 110               x = op->values[i].value;
 111               trace(formats[width], op->values[i].value);
 112             }
 113           else
 114             {
 115               switch (width)
 116                 {
 117                 case 1:
 118                   y = pci_read_byte(dev, addr);
 119                   break;
 120                 case 2:
 121                   y = pci_read_word(dev, addr);
 122                   break;
 123                 default:
 124                   y = pci_read_long(dev, addr);
 125                   break;
 126                 }
 127               x = (y & ~op->values[i].mask) | op->values[i].value;
 128               trace(mask_formats[width], y, op->values[i].value, op->values[i].mask, x);
 129             }
 130           if (!demo_mode)
 131             {
 132               switch (width)
 133                 {
 134                 case 1:
 135                   pci_write_byte(dev, addr, x);
 136                   break;
 137                 case 2:
 138                   pci_write_word(dev, addr, x);
 139                   break;
 140                 default:
 141                   pci_write_long(dev, addr, x);
 142                   break;
 143                 }
 144             }
 145           addr += width;
 146         }
 147       trace("\n");
 148     }
 149   else
 150     {
 151       trace(" = ");
 152       switch (width)
 153         {
 154         case 1:
 155           x = pci_read_byte(dev, addr);
 156           break;
 157         case 2:
 158           x = pci_read_word(dev, addr);
 159           break;
 160         default:
 161           x = pci_read_long(dev, addr);
 162           break;
 163         }
 164       printf(formats[width]+1, x);
 165       putchar('\n');
 166     }
 167 }
 168
 169 static void
 170 execute(struct op *op)
 171 {
 172   struct pci_dev **vec = NULL;
 173   struct pci_dev **pdev, *dev;
 174   struct op *oops;
 175
 176   while (op)
 177     {
 178       pdev = vec = op->dev_vector;
 179       while (dev = *pdev++)
 180         for (oops=op; oops && oops->dev_vector == vec; oops=oops->next)
 181           exec_op(oops, dev);
 182       while (op && op->dev_vector == vec)
 183         op = op->next;
 184     }
 185 }
 186
 187 static void
 188 scan_ops(struct op *op)
 189 {
 190   if (demo_mode)
 191     return;
 192   while (op)
 193     {
 194       if (op->num_values)
 195         pacc->writeable = 1;
 196       op = op->next;
 197     }
 198 }
 199
 200 struct reg_name {
 201   unsigned int cap;
 202   unsigned int offset;
 203   unsigned int width;
 204   const char *name;
 205 };
 206
 207 static const struct reg_name pci_reg_names[] = {
 208   {       0, 0x00, 2, "VENDOR_ID" },
 209   {       0, 0x02, 2, "DEVICE_ID" },
 210   {       0, 0x04, 2, "COMMAND" },
 211   {       0, 0x06, 2, "STATUS" },
 212   {       0, 0x08, 1, "REVISION" },
 213   {       0, 0x09, 1, "CLASS_PROG" },
 214   {       0, 0x0a, 2, "CLASS_DEVICE" },
 215   {       0, 0x0c, 1, "CACHE_LINE_SIZE" },
 216   {       0, 0x0d, 1, "LATENCY_TIMER" },
 217   {       0, 0x0e, 1, "HEADER_TYPE" },
 218   {       0, 0x0f, 1, "BIST" },
 219   {       0, 0x10, 4, "BASE_ADDRESS_0" },
 220   {       0, 0x14, 4, "BASE_ADDRESS_1" },
 221   {       0, 0x18, 4, "BASE_ADDRESS_2" },
 222   {       0, 0x1c, 4, "BASE_ADDRESS_3" },
 223   {       0, 0x20, 4, "BASE_ADDRESS_4" },
 224   {       0, 0x24, 4, "BASE_ADDRESS_5" },
 225   {       0, 0x28, 4, "CARDBUS_CIS" },
 226   {       0, 0x2c, 4, "SUBSYSTEM_VENDOR_ID" },
 227   {       0, 0x2e, 2, "SUBSYSTEM_ID" },
 228   {       0, 0x30, 4, "ROM_ADDRESS" },
 229   {       0, 0x3c, 1, "INTERRUPT_LINE" },
 230   {       0, 0x3d, 1, "INTERRUPT_PIN" },
 231   {       0, 0x3e, 1, "MIN_GNT" },
 232   {       0, 0x3f, 1, "MAX_LAT" },
 233   {       0, 0x18, 1, "PRIMARY_BUS" },
 234   {       0, 0x19, 1, "SECONDARY_BUS" },
 235   {       0, 0x1a, 1, "SUBORDINATE_BUS" },
 236   {       0, 0x1b, 1, "SEC_LATENCY_TIMER" },
 237   {       0, 0x1c, 1, "IO_BASE" },
 238   {       0, 0x1d, 1, "IO_LIMIT" },
 239   {       0, 0x1e, 2, "SEC_STATUS" },
 240   {       0, 0x20, 2, "MEMORY_BASE" },
 241   {       0, 0x22, 2, "MEMORY_LIMIT" },
 242   {       0, 0x24, 2, "PREF_MEMORY_BASE" },
 243   {       0, 0x26, 2, "PREF_MEMORY_LIMIT" },
 244   {       0, 0x28, 4, "PREF_BASE_UPPER32" },
 245   {       0, 0x2c, 4, "PREF_LIMIT_UPPER32" },
 246   {       0, 0x30, 2, "IO_BASE_UPPER16" },
 247   {       0, 0x32, 2, "IO_LIMIT_UPPER16" },
 248   {       0, 0x38, 4, "BRIDGE_ROM_ADDRESS" },
 249   {       0, 0x3e, 2, "BRIDGE_CONTROL" },
 250   {       0, 0x10, 4, "CB_CARDBUS_BASE" },
 251   {       0, 0x14, 2, "CB_CAPABILITIES" },
 252   {       0, 0x16, 2, "CB_SEC_STATUS" },
 253   {       0, 0x18, 1, "CB_BUS_NUMBER" },
 254   {       0, 0x19, 1, "CB_CARDBUS_NUMBER" },
 255   {       0, 0x1a, 1, "CB_SUBORDINATE_BUS" },
 256   {       0, 0x1b, 1, "CB_CARDBUS_LATENCY" },
 257   {       0, 0x1c, 4, "CB_MEMORY_BASE_0" },
 258   {       0, 0x20, 4, "CB_MEMORY_LIMIT_0" },
 259   {       0, 0x24, 4, "CB_MEMORY_BASE_1" },
 260   {       0, 0x28, 4, "CB_MEMORY_LIMIT_1" },
 261   {       0, 0x2c, 2, "CB_IO_BASE_0" },
 262   {       0, 0x2e, 2, "CB_IO_BASE_0_HI" },
 263   {       0, 0x30, 2, "CB_IO_LIMIT_0" },
 264   {       0, 0x32, 2, "CB_IO_LIMIT_0_HI" },
 265   {       0, 0x34, 2, "CB_IO_BASE_1" },
 266   {       0, 0x36, 2, "CB_IO_BASE_1_HI" },
 267   {       0, 0x38, 2, "CB_IO_LIMIT_1" },
 268   {       0, 0x3a, 2, "CB_IO_LIMIT_1_HI" },
 269   {       0, 0x40, 2, "CB_SUBSYSTEM_VENDOR_ID" },
 270   {       0, 0x42, 2, "CB_SUBSYSTEM_ID" },
 271   {       0, 0x44, 4, "CB_LEGACY_MODE_BASE" },
 272   { 0x10001,    0, 0, "CAP_PM" },
 273   { 0x10002,    0, 0, "CAP_AGP" },
 274   { 0x10003,    0, 0, "CAP_VPD" },
 275   { 0x10004,    0, 0, "CAP_SLOTID" },
 276   { 0x10005,    0, 0, "CAP_MSI" },
 277   { 0x10006,    0, 0, "CAP_CHSWP" },
 278   { 0x10007,    0, 0, "CAP_PCIX" },
 279   { 0x10008,    0, 0, "CAP_HT" },
 280   { 0x10009,    0, 0, "CAP_VNDR" },
 281   { 0x1000a,    0, 0, "CAP_DBG" },
 282   { 0x1000b,    0, 0, "CAP_CCRC" },
 283   { 0x1000c,    0, 0, "CAP_HOTPLUG" },
 284   { 0x1000d,    0, 0, "CAP_SSVID" },
 285   { 0x1000e,    0, 0, "CAP_AGP3" },
 286   { 0x1000f,    0, 0, "CAP_SECURE" },
 287   { 0x10010,    0, 0, "CAP_EXP" },
 288   { 0x10011,    0, 0, "CAP_MSIX" },
 289   { 0x10012,    0, 0, "CAP_SATA" },
 290   { 0x10013,    0, 0, "CAP_AF" },
 291   { 0x20001,    0, 0, "ECAP_AER" },
 292   { 0x20002,    0, 0, "ECAP_VC" },
 293   { 0x20003,    0, 0, "ECAP_DSN" },
 294   { 0x20004,    0, 0, "ECAP_PB" },
 295   { 0x20005,    0, 0, "ECAP_RCLINK" },
 296   { 0x20006,    0, 0, "ECAP_RCILINK" },
 297   { 0x20007,    0, 0, "ECAP_RCECOLL" },
 298   { 0x20008,    0, 0, "ECAP_MFVC" },
 299   { 0x2000a,    0, 0, "ECAP_RBCB" },
 300   { 0x2000b,    0, 0, "ECAP_VNDR" },
 301   { 0x2000d,    0, 0, "ECAP_ACS" },
 302   { 0x2000e,    0, 0, "ECAP_ARI" },
 303   { 0x2000f,    0, 0, "ECAP_ATS" },
 304   { 0x20010,    0, 0, "ECAP_SRIOV" },
 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
 486   if (!*c)
 487     return -1;
 488   errno = 0;
 489   unsigned long int l = strtoul(c, &stop, 16);
 490   if (errno)
 491     return -1;
 492   if ((l & ~0U) != l)
 493     return -1;
 494   *resp = l;
 495   if (*stop)
 496     {
 497       if (stopp)
 498         *stopp = stop;
 499       return 0;
 500     }
 501   else
 502     {
 503       if (stopp)
 504         *stopp = NULL;
 505       return 1;
 506     }
 507 }
 508
 509 static void parse_register(struct op *op, char *base)
 510 {
 511   const struct reg_name *r;
 512   unsigned int cap;
 513
 514   op->cap_type = op->cap_id = 0;
 515   if (parse_x32(base, NULL, &op->addr) > 0)
 516     return;
 517   else if (r = parse_reg_name(base))
 518     {
 519       switch (r->cap & 0xff0000)
 520         {
 521         case 0x10000:
 522           op->cap_type = PCI_CAP_NORMAL;
 523           break;
 524         case 0x20000:
 525           op->cap_type = PCI_CAP_EXTENDED;
 526           break;
 527         }
 528       op->cap_id = r->cap & 0xffff;
 529       op->addr = r->offset;
 530       if (r->width && !op->width)
 531         op->width = r->width;
 532       return;
 533     }
 534   else if (!strncasecmp(base, "CAP", 3))
 535     {
 536       if (parse_x32(base+3, NULL, &cap) > 0 && cap < 0x100)
 537         {
 538           op->cap_type = PCI_CAP_NORMAL;
 539           op->cap_id = cap;
 540           op->addr = 0;
 541           return;
 542         }
 543     }
 544   else if (!strncasecmp(base, "ECAP", 4))
 545     {
 546       if (parse_x32(base+4, NULL, &cap) > 0 && cap < 0x1000)
 547         {
 548           op->cap_type = PCI_CAP_EXTENDED;
 549           op->cap_id = cap;
 550           op->addr = 0;
 551           return;
 552         }
 553     }
 554   parse_err("Unknown register \"%s\"", base);
 555 }
 556
 557 static void parse_op(char *c, struct pci_dev **selected_devices)
 558 {
 559   char *base, *offset, *width, *value;
 560   char *e, *f;
 561   int n, j;
 562   struct op *op;
 563
 564   /* Split the argument */
 565   base = xstrdup(c);
 566   if (value = strchr(base, '='))
 567     *value++ = 0;
 568   if (width = strchr(base, '.'))
 569     *width++ = 0;
 570   if (offset = strchr(base, '+'))
 571     *offset++ = 0;
 572
 573   /* Look for setting of values and count how many */
 574   n = 0;
 575   if (value)
 576     {
 577       if (!*value)
 578         parse_err("Missing value");
 579       n++;
 580       for (e=value; *e; e++)
 581         if (*e == ',')
 582           n++;
 583     }
 584
 585   /* Allocate the operation */
 586   op = xmalloc(sizeof(struct op) + n*sizeof(struct value));
 587   op->dev_vector = selected_devices;
 588   op->num_values = n;
 589
 590   /* What is the width suffix? */
 591   if (width)
 592     {
 593       if (width[1])
 594         parse_err("Invalid width \"%s\"", width);
 595       switch (*width & 0xdf)
 596         {
 597         case 'B':
 598           op->width = 1; break;
 599         case 'W':
 600           op->width = 2; break;
 601         case 'L':
 602           op->width = 4; break;
 603         default:
 604           parse_err("Invalid width \"%c\"", *width);
 605         }
 606     }
 607   else
 608     op->width = 0;
 609
 610   /* Find the register */
 611   parse_register(op, base);
 612   if (!op->width)
 613     parse_err("Missing width");
 614
 615   /* Add offset */
 616   if (offset)
 617     {
 618       unsigned int off;
 619       if (parse_x32(offset, NULL, &off) <= 0 || off >= 0x1000)
 620         parse_err("Invalid offset \"%s\"", offset);
 621       op->addr += off;
 622     }
 623
 624   /* Check range */
 625   if (op->addr >= 0x1000 || op->addr + op->width*(n ? n : 1) > 0x1000)
 626     parse_err("Register number %02x out of range", op->addr);
 627   if (op->addr & (op->width - 1))
 628     parse_err("Unaligned register address %02x", op->addr);
 629
 630   /* Parse the values */
 631   for (j=0; j<n; j++)
 632     {
 633       unsigned int ll, lim;
 634       e = strchr(value, ',');
 635       if (e)
 636         *e++ = 0;
 637       if (parse_x32(value, &f, &ll) < 0 || f && *f != ':')
 638         parse_err("Invalid value \"%s\"", value);
 639       lim = max_values[op->width];
 640       if (ll > lim && ll < ~0UL - lim)
 641         parse_err("Value \"%s\" is out of range", value);
 642       op->values[j].value = ll;
 643       if (f && *f == ':')
 644         {
 645           if (parse_x32(f+1, NULL, &ll) <= 0)
 646             parse_err("Invalid mask \"%s\"", f+1);
 647           if (ll > lim && ll < ~0UL - lim)
 648             parse_err("Mask \"%s\" is out of range", f+1);
 649           op->values[j].mask = ll;
 650           op->values[j].value &= ll;
 651         }
 652       else
 653         op->values[j].mask = ~0U;
 654       value = e;
 655     }
 656
 657   *last_op = op;
 658   last_op = &op->next;
 659   op->next = NULL;
 660 }
 661
 662 static void parse_ops(int argc, char **argv, int i)
 663 {
 664   enum { STATE_INIT, STATE_GOT_FILTER, STATE_GOT_OP } state = STATE_INIT;
 665   struct pci_filter filter;
 666   struct pci_dev **selected_devices = NULL;
 667
 668   while (i < argc)
 669     {
 670       char *c = argv[i++];
 671
 672       if (*c == '-')
 673         {
 674           if (state != STATE_GOT_FILTER)
 675             pci_filter_init(pacc, &filter);
 676           i = parse_filter(argc, argv, i-1, &filter);
 677           state = STATE_GOT_FILTER;
 678         }
 679       else
 680         {
 681           if (state == STATE_INIT)
 682             parse_err("Filter specification expected");
 683           if (state == STATE_GOT_FILTER)
 684             selected_devices = select_devices(&filter);
 685           if (!selected_devices[0] && !force)
 686             fprintf(stderr, "setpci: Warning: No devices selected for \"%s\".\n", c);
 687           parse_op(c, selected_devices);
 688           state = STATE_GOT_OP;
 689         }
 690     }
 691   if (state == STATE_INIT)
 692     parse_err("No operation specified");
 693 }
 694
 695 int
 696 main(int argc, char **argv)
 697 {
 698   int i;
 699
 700   pacc = pci_alloc();
 701   pacc->error = die;
 702   i = parse_options(argc, argv);
 703
 704   pci_init(pacc);
 705   pci_scan_bus(pacc);
 706
 707   parse_ops(argc, argv, i);
 708   scan_ops(first_op);
 709   execute(first_op);
 710
 711   return 0;
 712 }