lspci.c

   1 /*
   2  *      $Id: lspci.c,v 1.27 1999/07/07 11:23:04 mj Exp $
   3  *
   4  *      Linux PCI Utilities -- List All PCI Devices
   5  *
   6  *      Copyright (c) 1997--1999 Martin Mares <mj@atrey.karlin.mff.cuni.cz>
   7  *
   8  *      Can be freely distributed and used under the terms of the GNU GPL.
   9  */
  10
  11 #include <stdio.h>
  12 #include <string.h>
  13 #include <stdlib.h>
  14 #include <stdarg.h>
  15 #include <unistd.h>
  16
  17 #include "pciutils.h"
  18
  19 /* Options */
  20
  21 static int verbose;                     /* Show detailed information */
  22 static int buscentric_view;             /* Show bus addresses/IRQ's instead of CPU-visible ones */
  23 static int show_hex;                    /* Show contents of config space as hexadecimal numbers */
  24 static struct pci_filter filter;        /* Device filter */
  25 static int show_tree;                   /* Show bus tree */
  26 static int machine_readable;            /* Generate machine-readable output */
  27 static int map_mode;                    /* Bus mapping mode enabled */
  28
  29 static char options[] = "nvbxs:d:ti:mgM" GENERIC_OPTIONS ;
  30
  31 static char help_msg[] = "\
  32 Usage: lspci [<switches>]\n\
  33 \n\
  34 -v\t\tBe verbose\n\
  35 -n\t\tShow numeric ID's\n\
  36 -b\t\tBus-centric view (PCI addresses and IRQ's instead of those seen by the CPU)\n\
  37 -x\t\tShow hex-dump of config space\n\
  38 -s [[<bus>]:][<slot>][.[<func>]]\tShow only devices in selected slots\n\
  39 -d [<vendor>]:[<device>]\tShow only selected devices\n\
  40 -t\t\tShow bus tree\n\
  41 -m\t\tProduce machine-readable output\n\
  42 -i <file>\tUse specified ID database instead of %s\n\
  43 -M\t\tEnable `bus mapping' mode (dangerous; root only)\n"
  44 GENERIC_HELP
  45 ;
  46
  47 /* Communication with libpci */
  48
  49 static struct pci_access *pacc;
  50
  51 /* Format strings used for IRQ numbers and memory addresses */
  52
  53 #ifdef ARCH_SPARC64
  54 #define IRQ_FORMAT "%08x"
  55 #else
  56 #define IRQ_FORMAT "%d"
  57 #endif
  58
  59 #ifdef HAVE_64BIT_ADDRESS
  60 #ifdef HAVE_LONG_ADDRESS
  61 #define ADDR_FORMAT "%016Lx"
  62 #else
  63 #define ADDR_FORMAT "%016lx"
  64 #endif
  65 #else
  66 #define ADDR_FORMAT "%08lx"
  67 #endif
  68
  69 #ifdef ARCH_SPARC64
  70 #define IO_FORMAT "%016Lx"
  71 #elif defined(HAVE_64BIT_ADDRESS)
  72 #define IO_FORMAT "%04Lx"
  73 #else
  74 #define IO_FORMAT "%04lx"
  75 #endif
  76
  77 /* Our view of the PCI bus */
  78
  79 struct device {
  80   struct device *next;
  81   struct pci_dev *dev;
  82   unsigned int config_cnt;
  83   byte config[256];
  84 };
  85
  86 static struct device *first_dev;
  87
  88 static struct device *
  89 scan_device(struct pci_dev *p)
  90 {
  91   int how_much = (show_hex > 2) ? 256 : 64;
  92   struct device *d;
  93
  94   if (!pci_filter_match(&filter, p))
  95     return NULL;
  96   d = xmalloc(sizeof(struct device));
  97   bzero(d, sizeof(*d));
  98   d->dev = p;
  99   if (!pci_read_block(p, 0, d->config, how_much))
 100     die("Unable to read %d bytes of configuration space.", how_much);
 101   if (how_much < 128 && (d->config[PCI_HEADER_TYPE] & 0x7f) == PCI_HEADER_TYPE_CARDBUS)
 102     {
 103       /* For cardbus bridges, we need to fetch 64 bytes more to get the full standard header... */
 104       if (!pci_read_block(p, 0, d->config+64, 64))
 105         die("Unable to read cardbus bridge extension data.");
 106       how_much = 128;
 107     }
 108   d->config_cnt = how_much;
 109   pci_setup_cache(p, d->config, d->config_cnt);
 110   pci_fill_info(p, PCI_FILL_IDENT | PCI_FILL_IRQ | PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES);
 111   return d;
 112 }
 113
 114 static void
 115 scan_devices(void)
 116 {
 117   struct device *d;
 118   struct pci_dev *p;
 119
 120   pci_scan_bus(pacc);
 121   for(p=pacc->devices; p; p=p->next)
 122     if (d = scan_device(p))
 123       {
 124         d->next = first_dev;
 125         first_dev = d;
 126       }
 127 }
 128
 129 static int
 130 check_root(void)
 131 {
 132   static int is_root = -1;
 133
 134   if (is_root < 0)
 135     is_root = !geteuid();
 136   return is_root;
 137 }
 138
 139 static int
 140 config_fetch(struct device *d, unsigned int pos, unsigned int len)
 141 {
 142   if (pos + len < d->config_cnt)
 143     return 1;
 144   if (pacc->method != PCI_ACCESS_DUMP && !check_root())
 145     return 0;
 146   return pci_read_block(d->dev, pos, d->config + pos, len);
 147 }
 148
 149 /* Config space accesses */
 150
 151 static inline byte
 152 get_conf_byte(struct device *d, unsigned int pos)
 153 {
 154   return d->config[pos];
 155 }
 156
 157 static word
 158 get_conf_word(struct device *d, unsigned int pos)
 159 {
 160   return d->config[pos] | (d->config[pos+1] << 8);
 161 }
 162
 163 static u32
 164 get_conf_long(struct device *d, unsigned int pos)
 165 {
 166   return d->config[pos] |
 167     (d->config[pos+1] << 8) |
 168     (d->config[pos+2] << 16) |
 169     (d->config[pos+3] << 24);
 170 }
 171
 172 /* Sorting */
 173
 174 static int
 175 compare_them(const void *A, const void *B)
 176 {
 177   const struct pci_dev *a = (*(const struct device **)A)->dev;
 178   const struct pci_dev *b = (*(const struct device **)B)->dev;
 179
 180   if (a->bus < b->bus)
 181     return -1;
 182   if (a->bus > b->bus)
 183     return 1;
 184   if (a->dev < b->dev)
 185     return -1;
 186   if (a->dev > b->dev)
 187     return 1;
 188   if (a->func < b->func)
 189     return -1;
 190   if (a->func > b->func)
 191     return 1;
 192   return 0;
 193 }
 194
 195 static void
 196 sort_them(void)
 197 {
 198   struct device **index, **h, **last_dev;
 199   int cnt;
 200   struct device *d;
 201
 202   cnt = 0;
 203   for(d=first_dev; d; d=d->next)
 204     cnt++;
 205   h = index = alloca(sizeof(struct device *) * cnt);
 206   for(d=first_dev; d; d=d->next)
 207     *h++ = d;
 208   qsort(index, cnt, sizeof(struct device *), compare_them);
 209   last_dev = &first_dev;
 210   h = index;
 211   while (cnt--)
 212     {
 213       *last_dev = *h;
 214       last_dev = &(*h)->next;
 215       h++;
 216     }
 217   *last_dev = NULL;
 218 }
 219
 220 /* Normal output */
 221
 222 #define FLAG(x,y) ((x & y) ? '+' : '-')
 223
 224 static void
 225 show_terse(struct device *d)
 226 {
 227   int c;
 228   struct pci_dev *p = d->dev;
 229   byte classbuf[128], devbuf[128];
 230
 231   printf("%02x:%02x.%x %s: %s",
 232          p->bus,
 233          p->dev,
 234          p->func,
 235          pci_lookup_name(pacc, classbuf, sizeof(classbuf),
 236                          PCI_LOOKUP_CLASS,
 237                          get_conf_word(d, PCI_CLASS_DEVICE), 0),
 238          pci_lookup_name(pacc, devbuf, sizeof(devbuf),
 239                          PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
 240                          p->vendor_id, p->device_id));
 241   if (c = get_conf_byte(d, PCI_REVISION_ID))
 242     printf(" (rev %02x)", c);
 243   if (verbose && (c = get_conf_byte(d, PCI_CLASS_PROG)))
 244     printf(" (prog-if %02x)", c);
 245   putchar('\n');
 246 }
 247
 248 static void
 249 show_size(pciaddr_t x)
 250 {
 251   printf(" [size=");
 252   if (x < 1024)
 253     printf("%d", (int) x);
 254   else if (x < 1048576)
 255     printf("%dK", (int)(x / 1024));
 256   else if (x < 0x80000000)
 257     printf("%dM", (int)(x / 1048576));
 258   else
 259     printf(ADDR_FORMAT, x);
 260   putchar(']');
 261 }
 262
 263 static void
 264 show_bases(struct device *d, int cnt)
 265 {
 266   struct pci_dev *p = d->dev;
 267   word cmd = get_conf_word(d, PCI_COMMAND);
 268   int i;
 269
 270   for(i=0; i<cnt; i++)
 271     {
 272       pciaddr_t pos = p->base_addr[i];
 273       pciaddr_t len = (p->known_fields & PCI_FILL_SIZES) ? p->size[i] : 0;
 274       u32 flg = get_conf_long(d, PCI_BASE_ADDRESS_0 + 4*i);
 275       if (flg == 0xffffffff)
 276         flg = 0;
 277       if (!pos && !flg && !len)
 278         continue;
 279       if (verbose > 1)
 280         printf("\tRegion %d: ", i);
 281       else
 282         putchar('\t');
 283       if (pos && !flg)                  /* Reported by the OS, but not by the device */
 284         {
 285           printf("[virtual] ");
 286           flg = pos;
 287         }
 288       if (flg & PCI_BASE_ADDRESS_SPACE_IO)
 289         {
 290           pciaddr_t a = pos & PCI_BASE_ADDRESS_IO_MASK;
 291           printf("I/O ports at ");
 292           if (a)
 293             printf(IO_FORMAT, a);
 294           else if (flg & PCI_BASE_ADDRESS_IO_MASK)
 295             printf("<ignored>");
 296           else
 297             printf("<unassigned>");
 298           if (!(cmd & PCI_COMMAND_IO))
 299             printf(" [disabled]");
 300         }
 301       else
 302         {
 303           int t = flg & PCI_BASE_ADDRESS_MEM_TYPE_MASK;
 304           pciaddr_t a = pos & PCI_ADDR_MEM_MASK;
 305           int done = 0;
 306           u32 z = 0;
 307
 308           printf("Memory at ");
 309           if (t == PCI_BASE_ADDRESS_MEM_TYPE_64)
 310             {
 311               if (i >= cnt - 1)
 312                 {
 313                   printf("<invalid-64bit-slot>");
 314                   done = 1;
 315                 }
 316               else
 317                 {
 318                   i++;
 319                   z = get_conf_long(d, PCI_BASE_ADDRESS_0 + 4*i);
 320                   if (buscentric_view)
 321                     {
 322                       if (a || z)
 323                         printf("%08x" ADDR_FORMAT, z, a);
 324                       else
 325                         printf("<unassigned>");
 326                       done = 1;
 327                     }
 328                 }
 329             }
 330           if (!done)
 331             {
 332               if (a)
 333                 printf(ADDR_FORMAT, a);
 334               else
 335                 printf(((flg & PCI_BASE_ADDRESS_MEM_MASK) || z) ? "<ignored>" : "<unassigned>");
 336             }
 337           printf(" (%s, %sprefetchable)",
 338                  (t == PCI_BASE_ADDRESS_MEM_TYPE_32) ? "32-bit" :
 339                  (t == PCI_BASE_ADDRESS_MEM_TYPE_64) ? "64-bit" :
 340                  (t == PCI_BASE_ADDRESS_MEM_TYPE_1M) ? "low-1M" : "type 3",
 341                  (flg & PCI_BASE_ADDRESS_MEM_PREFETCH) ? "" : "non-");
 342           if (!(cmd & PCI_COMMAND_MEMORY))
 343             printf(" [disabled]");
 344         }
 345       if (len)
 346         show_size(len);
 347       putchar('\n');
 348     }
 349 }
 350
 351 static void
 352 show_pm(struct device *d, int where, int cap)
 353 {
 354   int t;
 355
 356   printf("Power Management version %d\n", cap & PCI_PM_CAP_VER_MASK);
 357   if (verbose < 2)
 358     return;
 359   printf("\t\tFlags: PMEClk%c AuxPwr%c DSI%c D1%c D2%c PME%c\n",
 360          FLAG(cap, PCI_PM_CAP_PME_CLOCK),
 361          FLAG(cap, PCI_PM_CAP_AUX_POWER),
 362          FLAG(cap, PCI_PM_CAP_DSI),
 363          FLAG(cap, PCI_PM_CAP_D1),
 364          FLAG(cap, PCI_PM_CAP_D2),
 365          FLAG(cap, PCI_PM_CAP_PME));
 366   config_fetch(d, where + PCI_PM_CTRL, PCI_PM_SIZEOF - PCI_PM_CTRL);
 367   t = get_conf_word(d, where + PCI_PM_CTRL);
 368   printf("\t\tStatus: D%d PME-Enable%c DSel=%x DScale=%x PME%c\n",
 369          t & PCI_PM_CTRL_STATE_MASK,
 370          FLAG(t, PCI_PM_CTRL_PME_ENABLE),
 371          (t & PCI_PM_CTRL_DATA_SEL_MASK) >> 9,
 372          (t & PCI_PM_CTRL_DATA_SCALE_MASK) >> 13,
 373          FLAG(t, PCI_PM_CTRL_PME_STATUS));
 374 }
 375
 376 static void
 377 show_agp(struct device *d, int where, int cap)
 378 {
 379   u32 t;
 380
 381   t = cap & 0xff;
 382   printf("AGP version %x.%x\n", cap/16, cap%16);
 383   if (verbose < 2)
 384     return;
 385   config_fetch(d, where + PCI_AGP_STATUS, PCI_AGP_SIZEOF - PCI_AGP_STATUS);
 386   t = get_conf_long(d, where + PCI_AGP_STATUS);
 387   printf("\t\tStatus: RQ=%d SBA%c 64bit%c FW%c Rate=%s%s%s\n",
 388          (t & PCI_AGP_STATUS_RQ_MASK) >> 24U,
 389          FLAG(t, PCI_AGP_STATUS_SBA),
 390          FLAG(t, PCI_AGP_STATUS_64BIT),
 391          FLAG(t, PCI_AGP_STATUS_FW),
 392          (t & PCI_AGP_STATUS_RATE4) ? "4" : "",
 393          (t & PCI_AGP_STATUS_RATE2) ? "2" : "",
 394          (t & PCI_AGP_STATUS_RATE1) ? "1" : "");
 395   t = get_conf_long(d, where + PCI_AGP_COMMAND);
 396   printf("\t\tCommand: RQ=%d SBA%c AGP%c 64bit%c FW%c Rate=%s%s%s\n",
 397          (t & PCI_AGP_COMMAND_RQ_MASK) >> 24U,
 398          FLAG(t, PCI_AGP_COMMAND_SBA),
 399          FLAG(t, PCI_AGP_COMMAND_AGP),
 400          FLAG(t, PCI_AGP_COMMAND_64BIT),
 401          FLAG(t, PCI_AGP_COMMAND_FW),
 402          (t & PCI_AGP_COMMAND_RATE4) ? "4" : "",
 403          (t & PCI_AGP_COMMAND_RATE2) ? "2" : "",
 404          (t & PCI_AGP_COMMAND_RATE1) ? "1" : "");
 405 }
 406
 407 static void
 408 show_rom(struct device *d)
 409 {
 410   struct pci_dev *p = d->dev;
 411   pciaddr_t rom = p->rom_base_addr;
 412   pciaddr_t len = (p->known_fields & PCI_FILL_SIZES) ? p->rom_size : 0;
 413
 414   if (!rom && !len)
 415     return;
 416   printf("\tExpansion ROM at ");
 417   if (rom & PCI_ROM_ADDRESS_MASK)
 418     printf(ADDR_FORMAT, rom & PCI_ROM_ADDRESS_MASK);
 419   else
 420     printf("<unassigned>");
 421   if (!(rom & PCI_ROM_ADDRESS_ENABLE))
 422     printf(" [disabled]");
 423   show_size(len);
 424   putchar('\n');
 425 }
 426
 427 static void
 428 show_msi(struct device *d, int where, int cap)
 429 {
 430   int is64;
 431   u32 t;
 432   u16 w;
 433
 434   printf("Message Signalled Interrupts: 64bit%c Queue=%d/%d Enable%c\n",
 435          FLAG(cap, PCI_MSI_FLAGS_64BIT),
 436          (cap & PCI_MSI_FLAGS_QSIZE) >> 4,
 437          (cap & PCI_MSI_FLAGS_QMASK) >> 1,
 438          FLAG(cap, PCI_MSI_FLAGS_ENABLE));
 439   if (verbose < 2)
 440     return;
 441   is64 = cap & PCI_MSI_FLAGS_64BIT;
 442   config_fetch(d, where + PCI_MSI_ADDRESS_LO, (is64 ? PCI_MSI_DATA_64 : PCI_MSI_DATA_32) + 2 - PCI_MSI_ADDRESS_LO);
 443   printf("\t\tAddress: ");
 444   if (is64)
 445     {
 446       t = get_conf_long(d, where + PCI_MSI_ADDRESS_HI);
 447       w = get_conf_word(d, where + PCI_MSI_DATA_64);
 448       printf("%08x", t);
 449     }
 450   else
 451     w = get_conf_word(d, where + PCI_MSI_DATA_32);
 452   t = get_conf_long(d, where + PCI_MSI_ADDRESS_LO);
 453   printf("%08x  Data: %04x\n", t, w);
 454 }
 455
 456 static void
 457 show_slotid(int cap)
 458 {
 459   int esr = cap & 0xff;
 460   int chs = cap >> 8;
 461
 462   printf("Slot ID: %d slots, First%c, chassis %02x\n",
 463          esr & PCI_SID_ESR_NSLOTS,
 464          FLAG(esr, PCI_SID_ESR_FIC),
 465          chs);
 466 }
 467
 468 static void
 469 show_caps(struct device *d)
 470 {
 471   if (get_conf_word(d, PCI_STATUS) & PCI_STATUS_CAP_LIST)
 472     {
 473       int where = get_conf_byte(d, PCI_CAPABILITY_LIST) & ~3;
 474       while (where)
 475         {
 476           int id, next, cap;
 477           printf("\tCapabilities: ");
 478           if (!config_fetch(d, where, 4))
 479             {
 480               puts("<available only to root>");
 481               break;
 482             }
 483           id = get_conf_byte(d, where + PCI_CAP_LIST_ID);
 484           next = get_conf_byte(d, where + PCI_CAP_LIST_NEXT) & ~3;
 485           cap = get_conf_word(d, where + PCI_CAP_FLAGS);
 486           printf("[%02x] ", where);
 487           if (id == 0xff)
 488             {
 489               printf("<chain broken>\n");
 490               break;
 491             }
 492           switch (id)
 493             {
 494             case PCI_CAP_ID_PM:
 495               show_pm(d, where, cap);
 496               break;
 497             case PCI_CAP_ID_AGP:
 498               show_agp(d, where, cap);
 499               break;
 500             case PCI_CAP_ID_VPD:
 501               printf("Vital Product Data\n");
 502               break;
 503             case PCI_CAP_ID_SLOTID:
 504               show_slotid(cap);
 505               break;
 506             case PCI_CAP_ID_MSI:
 507               show_msi(d, where, cap);
 508               break;
 509             default:
 510               printf("#%02x [%04x]\n", id, cap);
 511             }
 512           where = next;
 513         }
 514     }
 515 }
 516
 517 static void
 518 show_htype0(struct device *d)
 519 {
 520   show_bases(d, 6);
 521   show_rom(d);
 522   show_caps(d);
 523 }
 524
 525 static void
 526 show_htype1(struct device *d)
 527 {
 528   u32 io_base = get_conf_byte(d, PCI_IO_BASE);
 529   u32 io_limit = get_conf_byte(d, PCI_IO_LIMIT);
 530   u32 io_type = io_base & PCI_IO_RANGE_TYPE_MASK;
 531   u32 mem_base = get_conf_word(d, PCI_MEMORY_BASE);
 532   u32 mem_limit = get_conf_word(d, PCI_MEMORY_LIMIT);
 533   u32 mem_type = mem_base & PCI_MEMORY_RANGE_TYPE_MASK;
 534   u32 pref_base = get_conf_word(d, PCI_PREF_MEMORY_BASE);
 535   u32 pref_limit = get_conf_word(d, PCI_PREF_MEMORY_LIMIT);
 536   u32 pref_type = pref_base & PCI_PREF_RANGE_TYPE_MASK;
 537   word brc = get_conf_word(d, PCI_BRIDGE_CONTROL);
 538
 539   show_bases(d, 2);
 540   printf("\tBus: primary=%02x, secondary=%02x, subordinate=%02x, sec-latency=%d\n",
 541          get_conf_byte(d, PCI_PRIMARY_BUS),
 542          get_conf_byte(d, PCI_SECONDARY_BUS),
 543          get_conf_byte(d, PCI_SUBORDINATE_BUS),
 544          get_conf_byte(d, PCI_SEC_LATENCY_TIMER));
 545
 546   if (io_type != (io_limit & PCI_IO_RANGE_TYPE_MASK) ||
 547       (io_type != PCI_IO_RANGE_TYPE_16 && io_type != PCI_IO_RANGE_TYPE_32))
 548     printf("\t!!! Unknown I/O range types %x/%x\n", io_base, io_limit);
 549   else
 550     {
 551       io_base = (io_base & PCI_IO_RANGE_MASK) << 8;
 552       io_limit = (io_limit & PCI_IO_RANGE_MASK) << 8;
 553       if (io_type == PCI_IO_RANGE_TYPE_32)
 554         {
 555           io_base |= (get_conf_word(d, PCI_IO_BASE_UPPER16) << 16);
 556           io_limit |= (get_conf_word(d, PCI_IO_LIMIT_UPPER16) << 16);
 557         }
 558       if (io_base)
 559         printf("\tI/O behind bridge: %08x-%08x\n", io_base, io_limit+0xfff);
 560     }
 561
 562   if (mem_type != (mem_limit & PCI_MEMORY_RANGE_TYPE_MASK) ||
 563       mem_type)
 564     printf("\t!!! Unknown memory range types %x/%x\n", mem_base, mem_limit);
 565   else if (mem_base)
 566     {
 567       mem_base = (mem_base & PCI_MEMORY_RANGE_MASK) << 16;
 568       mem_limit = (mem_limit & PCI_MEMORY_RANGE_MASK) << 16;
 569       printf("\tMemory behind bridge: %08x-%08x\n", mem_base, mem_limit + 0xfffff);
 570     }
 571
 572   if (pref_type != (pref_limit & PCI_PREF_RANGE_TYPE_MASK) ||
 573       (pref_type != PCI_PREF_RANGE_TYPE_32 && pref_type != PCI_PREF_RANGE_TYPE_64))
 574     printf("\t!!! Unknown prefetchable memory range types %x/%x\n", pref_base, pref_limit);
 575   else if (pref_base)
 576     {
 577       pref_base = (pref_base & PCI_PREF_RANGE_MASK) << 16;
 578       pref_limit = (pref_limit & PCI_PREF_RANGE_MASK) << 16;
 579       if (pref_type == PCI_PREF_RANGE_TYPE_32)
 580         printf("\tPrefetchable memory behind bridge: %08x-%08x\n", pref_base, pref_limit + 0xfffff);
 581       else
 582         printf("\tPrefetchable memory behind bridge: %08x%08x-%08x%08x\n",
 583                get_conf_long(d, PCI_PREF_BASE_UPPER32),
 584                pref_base,
 585                get_conf_long(d, PCI_PREF_LIMIT_UPPER32),
 586                pref_limit);
 587     }
 588
 589   if (get_conf_word(d, PCI_SEC_STATUS) & PCI_STATUS_SIG_SYSTEM_ERROR)
 590     printf("\tSecondary status: SERR\n");
 591
 592   show_rom(d);
 593
 594   if (verbose > 1)
 595     printf("\tBridgeCtl: Parity%c SERR%c NoISA%c VGA%c MAbort%c >Reset%c FastB2B%c\n",
 596            FLAG(brc, PCI_BRIDGE_CTL_PARITY),
 597            FLAG(brc, PCI_BRIDGE_CTL_SERR),
 598            FLAG(brc, PCI_BRIDGE_CTL_NO_ISA),
 599            FLAG(brc, PCI_BRIDGE_CTL_VGA),
 600            FLAG(brc, PCI_BRIDGE_CTL_MASTER_ABORT),
 601            FLAG(brc, PCI_BRIDGE_CTL_BUS_RESET),
 602            FLAG(brc, PCI_BRIDGE_CTL_FAST_BACK));
 603
 604   show_caps(d);
 605 }
 606
 607 static void
 608 show_htype2(struct device *d)
 609 {
 610   int i;
 611   word cmd = get_conf_word(d, PCI_COMMAND);
 612   word brc = get_conf_word(d, PCI_CB_BRIDGE_CONTROL);
 613   word exca = get_conf_word(d, PCI_CB_LEGACY_MODE_BASE);
 614
 615   show_bases(d, 1);
 616   printf("\tBus: primary=%02x, secondary=%02x, subordinate=%02x, sec-latency=%d\n",
 617          get_conf_byte(d, PCI_CB_PRIMARY_BUS),
 618          get_conf_byte(d, PCI_CB_CARD_BUS),
 619          get_conf_byte(d, PCI_CB_SUBORDINATE_BUS),
 620          get_conf_byte(d, PCI_CB_LATENCY_TIMER));
 621   for(i=0; i<2; i++)
 622     {
 623       int p = 8*i;
 624       u32 base = get_conf_long(d, PCI_CB_MEMORY_BASE_0 + p);
 625       u32 limit = get_conf_long(d, PCI_CB_MEMORY_LIMIT_0 + p);
 626       if (limit > base)
 627         printf("Memory window %d: %08x-%08x%s%s\n", i, base, limit,
 628                (cmd & PCI_COMMAND_MEMORY) ? "" : " [disabled]",
 629                (brc & (PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 << i)) ? " (prefetchable)" : "");
 630     }
 631   for(i=0; i<2; i++)
 632     {
 633       int p = 8*i;
 634       u32 base = get_conf_long(d, PCI_CB_IO_BASE_0 + p);
 635       u32 limit = get_conf_long(d, PCI_CB_IO_LIMIT_0 + p);
 636       if (!(base & PCI_IO_RANGE_TYPE_32))
 637         {
 638           base &= 0xffff;
 639           limit &= 0xffff;
 640         }
 641       base &= PCI_CB_IO_RANGE_MASK;
 642       if (!base)
 643         continue;
 644       limit = (limit & PCI_CB_IO_RANGE_MASK) + 3;
 645       printf("I/O window %d: %08x-%08x%s\n", i, base, limit,
 646              (cmd & PCI_COMMAND_IO) ? "" : " [disabled]");
 647     }
 648
 649   if (get_conf_word(d, PCI_CB_SEC_STATUS) & PCI_STATUS_SIG_SYSTEM_ERROR)
 650     printf("\tSecondary status: SERR\n");
 651   if (verbose > 1)
 652     printf("\tBridgeCtl: Parity%c SERR%c ISA%c VGA%c MAbort%c >Reset%c 16bInt%c PostWrite%c\n",
 653            FLAG(brc, PCI_CB_BRIDGE_CTL_PARITY),
 654            FLAG(brc, PCI_CB_BRIDGE_CTL_SERR),
 655            FLAG(brc, PCI_CB_BRIDGE_CTL_ISA),
 656            FLAG(brc, PCI_CB_BRIDGE_CTL_VGA),
 657            FLAG(brc, PCI_CB_BRIDGE_CTL_MASTER_ABORT),
 658            FLAG(brc, PCI_CB_BRIDGE_CTL_CB_RESET),
 659            FLAG(brc, PCI_CB_BRIDGE_CTL_16BIT_INT),
 660            FLAG(brc, PCI_CB_BRIDGE_CTL_POST_WRITES));
 661   if (exca)
 662     printf("\t16-bit legacy interface ports at %04x\n", exca);
 663 }
 664
 665 static void
 666 show_verbose(struct device *d)
 667 {
 668   struct pci_dev *p = d->dev;
 669   word status = get_conf_word(d, PCI_STATUS);
 670   word cmd = get_conf_word(d, PCI_COMMAND);
 671   word class = get_conf_word(d, PCI_CLASS_DEVICE);
 672   byte bist = get_conf_byte(d, PCI_BIST);
 673   byte htype = get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f;
 674   byte latency = get_conf_byte(d, PCI_LATENCY_TIMER);
 675   byte cache_line = get_conf_byte(d, PCI_CACHE_LINE_SIZE);
 676   byte max_lat, min_gnt;
 677   byte int_pin = get_conf_byte(d, PCI_INTERRUPT_PIN);
 678   unsigned int irq = p->irq;
 679   word subsys_v, subsys_d;
 680   char ssnamebuf[256];
 681
 682   show_terse(d);
 683
 684   switch (htype)
 685     {
 686     case PCI_HEADER_TYPE_NORMAL:
 687       if (class == PCI_CLASS_BRIDGE_PCI)
 688         {
 689         badhdr:
 690           printf("\t!!! Header type %02x doesn't match class code %04x\n", htype, class);
 691           return;
 692         }
 693       max_lat = get_conf_byte(d, PCI_MAX_LAT);
 694       min_gnt = get_conf_byte(d, PCI_MIN_GNT);
 695       subsys_v = get_conf_word(d, PCI_SUBSYSTEM_VENDOR_ID);
 696       subsys_d = get_conf_word(d, PCI_SUBSYSTEM_ID);
 697       break;
 698     case PCI_HEADER_TYPE_BRIDGE:
 699       if (class != PCI_CLASS_BRIDGE_PCI)
 700         goto badhdr;
 701       irq = int_pin = min_gnt = max_lat = 0;
 702       subsys_v = subsys_d = 0;
 703       break;
 704     case PCI_HEADER_TYPE_CARDBUS:
 705       if ((class >> 8) != PCI_BASE_CLASS_BRIDGE)
 706         goto badhdr;
 707       min_gnt = max_lat = 0;
 708       subsys_v = get_conf_word(d, PCI_CB_SUBSYSTEM_VENDOR_ID);
 709       subsys_d = get_conf_word(d, PCI_CB_SUBSYSTEM_ID);
 710       break;
 711     default:
 712       printf("\t!!! Unknown header type %02x\n", htype);
 713       return;
 714     }
 715
 716   if (verbose && subsys_v && subsys_v != 0xffff)
 717     printf("\tSubsystem: %s\n",
 718            pci_lookup_name(pacc, ssnamebuf, sizeof(ssnamebuf),
 719                            PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
 720                            subsys_v, subsys_d));
 721
 722   if (verbose > 1)
 723     {
 724       printf("\tControl: I/O%c Mem%c BusMaster%c SpecCycle%c MemWINV%c VGASnoop%c ParErr%c Stepping%c SERR%c FastB2B%c\n",
 725              FLAG(cmd, PCI_COMMAND_IO),
 726              FLAG(cmd, PCI_COMMAND_MEMORY),
 727              FLAG(cmd, PCI_COMMAND_MASTER),
 728              FLAG(cmd, PCI_COMMAND_SPECIAL),
 729              FLAG(cmd, PCI_COMMAND_INVALIDATE),
 730              FLAG(cmd, PCI_COMMAND_VGA_PALETTE),
 731              FLAG(cmd, PCI_COMMAND_PARITY),
 732              FLAG(cmd, PCI_COMMAND_WAIT),
 733              FLAG(cmd, PCI_COMMAND_SERR),
 734              FLAG(cmd, PCI_COMMAND_FAST_BACK));
 735       printf("\tStatus: Cap%c 66Mhz%c UDF%c FastB2B%c ParErr%c DEVSEL=%s >TAbort%c <TAbort%c <MAbort%c >SERR%c <PERR%c\n",
 736              FLAG(status, PCI_STATUS_CAP_LIST),
 737              FLAG(status, PCI_STATUS_66MHZ),
 738              FLAG(status, PCI_STATUS_UDF),
 739              FLAG(status, PCI_STATUS_FAST_BACK),
 740              FLAG(status, PCI_STATUS_PARITY),
 741              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_SLOW) ? "slow" :
 742              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_MEDIUM) ? "medium" :
 743              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_FAST) ? "fast" : "??",
 744              FLAG(status, PCI_STATUS_SIG_TARGET_ABORT),
 745              FLAG(status, PCI_STATUS_REC_TARGET_ABORT),
 746              FLAG(status, PCI_STATUS_REC_MASTER_ABORT),
 747              FLAG(status, PCI_STATUS_SIG_SYSTEM_ERROR),
 748              FLAG(status, PCI_STATUS_DETECTED_PARITY));
 749       if (cmd & PCI_COMMAND_MASTER)
 750         {
 751           printf("\tLatency: ");
 752           if (min_gnt)
 753             printf("%d min, ", min_gnt);
 754           if (max_lat)
 755             printf("%d max, ", max_lat);
 756           printf("%d set", latency);
 757           if (cache_line)
 758             printf(", cache line size %02x", cache_line);
 759           putchar('\n');
 760         }
 761       if (int_pin || irq)
 762         printf("\tInterrupt: pin %c routed to IRQ " IRQ_FORMAT "\n",
 763                (int_pin ? 'A' + int_pin - 1 : '?'), irq);
 764     }
 765   else
 766     {
 767       printf("\tFlags: ");
 768       if (cmd & PCI_COMMAND_MASTER)
 769         printf("bus master, ");
 770       if (cmd & PCI_COMMAND_VGA_PALETTE)
 771         printf("VGA palette snoop, ");
 772       if (cmd & PCI_COMMAND_WAIT)
 773         printf("stepping, ");
 774       if (cmd & PCI_COMMAND_FAST_BACK)
 775         printf("fast Back2Back, ");
 776       if (status & PCI_STATUS_66MHZ)
 777         printf("66Mhz, ");
 778       if (status & PCI_STATUS_UDF)
 779         printf("user-definable features, ");
 780       printf("%s devsel",
 781              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_SLOW) ? "slow" :
 782              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_MEDIUM) ? "medium" :
 783              ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_FAST) ? "fast" : "??");
 784       if (cmd & PCI_COMMAND_MASTER)
 785         printf(", latency %d", latency);
 786       if (irq)
 787         printf(", IRQ " IRQ_FORMAT, irq);
 788       putchar('\n');
 789     }
 790
 791   if (bist & PCI_BIST_CAPABLE)
 792     {
 793       if (bist & PCI_BIST_START)
 794         printf("\tBIST is running\n");
 795       else
 796         printf("\tBIST result: %02x\n", bist & PCI_BIST_CODE_MASK);
 797     }
 798
 799   switch (htype)
 800     {
 801     case PCI_HEADER_TYPE_NORMAL:
 802       show_htype0(d);
 803       break;
 804     case PCI_HEADER_TYPE_BRIDGE:
 805       show_htype1(d);
 806       break;
 807     case PCI_HEADER_TYPE_CARDBUS:
 808       show_htype2(d);
 809       break;
 810     }
 811 }
 812
 813 static void
 814 show_hex_dump(struct device *d)
 815 {
 816   unsigned int i;
 817
 818   for(i=0; i<d->config_cnt; i++)
 819     {
 820       if (! (i & 15))
 821         printf("%02x:", i);
 822       printf(" %02x", get_conf_byte(d, i));
 823       if ((i & 15) == 15)
 824         putchar('\n');
 825     }
 826 }
 827
 828 static void
 829 show_machine(struct device *d)
 830 {
 831   struct pci_dev *p = d->dev;
 832   int c;
 833   word sv_id=0, sd_id=0;
 834   char classbuf[128], vendbuf[128], devbuf[128], svbuf[128], sdbuf[128];
 835
 836   switch (get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f)
 837     {
 838     case PCI_HEADER_TYPE_NORMAL:
 839       sv_id = get_conf_word(d, PCI_SUBSYSTEM_VENDOR_ID);
 840       sd_id = get_conf_word(d, PCI_SUBSYSTEM_ID);
 841       break;
 842     case PCI_HEADER_TYPE_CARDBUS:
 843       sv_id = get_conf_word(d, PCI_CB_SUBSYSTEM_VENDOR_ID);
 844       sd_id = get_conf_word(d, PCI_CB_SUBSYSTEM_ID);
 845       break;
 846     }
 847
 848   if (verbose)
 849     {
 850       printf("Device:\t%02x:%02x.%x\n", p->bus, p->dev, p->func);
 851       printf("Class:\t%s\n",
 852              pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS, get_conf_word(d, PCI_CLASS_DEVICE), 0));
 853       printf("Vendor:\t%s\n",
 854              pci_lookup_name(pacc, vendbuf, sizeof(vendbuf), PCI_LOOKUP_VENDOR, p->vendor_id, p->device_id));
 855       printf("Device:\t%s\n",
 856              pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, p->vendor_id, p->device_id));
 857       if (sv_id && sv_id != 0xffff)
 858         {
 859           printf("SVendor:\t%s\n",
 860                  pci_lookup_name(pacc, svbuf, sizeof(svbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR, sv_id, sd_id));
 861           printf("SDevice:\t%s\n",
 862                  pci_lookup_name(pacc, sdbuf, sizeof(sdbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE, sv_id, sd_id));
 863         }
 864       if (c = get_conf_byte(d, PCI_REVISION_ID))
 865         printf("Rev:\t%02x\n", c);
 866       if (c = get_conf_byte(d, PCI_CLASS_PROG))
 867         printf("ProgIf:\t%02x\n", c);
 868     }
 869   else
 870     {
 871       printf("%02x:%02x.%x ", p->bus, p->dev, p->func);
 872       printf("\"%s\" \"%s\" \"%s\"",
 873              pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS,
 874                              get_conf_word(d, PCI_CLASS_DEVICE), 0),
 875              pci_lookup_name(pacc, vendbuf, sizeof(vendbuf), PCI_LOOKUP_VENDOR,
 876                              p->vendor_id, p->device_id),
 877              pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE,
 878                              p->vendor_id, p->device_id));
 879       if (c = get_conf_byte(d, PCI_REVISION_ID))
 880         printf(" -r%02x", c);
 881       if (c = get_conf_byte(d, PCI_CLASS_PROG))
 882         printf(" -p%02x", c);
 883       if (sv_id && sv_id != 0xffff)
 884         printf(" \"%s\" \"%s\"",
 885                pci_lookup_name(pacc, svbuf, sizeof(svbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR, sv_id, sd_id),
 886                pci_lookup_name(pacc, sdbuf, sizeof(sdbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE, sv_id, sd_id));
 887       else
 888         printf(" \"\" \"\"");
 889       putchar('\n');
 890     }
 891 }
 892
 893 static void
 894 show_device(struct device *d)
 895 {
 896   if (machine_readable)
 897     show_machine(d);
 898   else if (verbose)
 899     show_verbose(d);
 900   else
 901     show_terse(d);
 902   if (show_hex)
 903     show_hex_dump(d);
 904   if (verbose || show_hex)
 905     putchar('\n');
 906 }
 907
 908 static void
 909 show(void)
 910 {
 911   struct device *d;
 912
 913   for(d=first_dev; d; d=d->next)
 914     show_device(d);
 915 }
 916
 917 /* Tree output */
 918
 919 struct bridge {
 920   struct bridge *chain;                 /* Single-linked list of bridges */
 921   struct bridge *next, *child;          /* Tree of bridges */
 922   struct bus *first_bus;                /* List of busses connected to this bridge */
 923   unsigned int primary, secondary, subordinate; /* Bus numbers */
 924   struct device *br_dev;
 925 };
 926
 927 struct bus {
 928   unsigned int number;
 929   struct bus *sibling;
 930   struct device *first_dev, **last_dev;
 931 };
 932
 933 static struct bridge host_bridge = { NULL, NULL, NULL, NULL, ~0, 0, ~0, NULL };
 934
 935 static struct bus *
 936 find_bus(struct bridge *b, unsigned int n)
 937 {
 938   struct bus *bus;
 939
 940   for(bus=b->first_bus; bus; bus=bus->sibling)
 941     if (bus->number == n)
 942       break;
 943   return bus;
 944 }
 945
 946 static struct bus *
 947 new_bus(struct bridge *b, unsigned int n)
 948 {
 949   struct bus *bus = xmalloc(sizeof(struct bus));
 950
 951   bus = xmalloc(sizeof(struct bus));
 952   bus->number = n;
 953   bus->sibling = b->first_bus;
 954   bus->first_dev = NULL;
 955   bus->last_dev = &bus->first_dev;
 956   b->first_bus = bus;
 957   return bus;
 958 }
 959
 960 static void
 961 insert_dev(struct device *d, struct bridge *b)
 962 {
 963   struct pci_dev *p = d->dev;
 964   struct bus *bus;
 965
 966   if (! (bus = find_bus(b, p->bus)))
 967     {
 968       struct bridge *c;
 969       for(c=b->child; c; c=c->next)
 970         if (c->secondary <= p->bus && p->bus <= c->subordinate)
 971           return insert_dev(d, c);
 972       bus = new_bus(b, p->bus);
 973     }
 974   /* Simple insertion at the end _does_ guarantee the correct order as the
 975    * original device list was sorted by (bus, devfn) lexicographically
 976    * and all devices on the new list have the same bus number.
 977    */
 978   *bus->last_dev = d;
 979   bus->last_dev = &d->next;
 980   d->next = NULL;
 981 }
 982
 983 static void
 984 grow_tree(void)
 985 {
 986   struct device *d, *d2;
 987   struct bridge **last_br, *b;
 988
 989   /* Build list of bridges */
 990
 991   last_br = &host_bridge.chain;
 992   for(d=first_dev; d; d=d->next)
 993     {
 994       word class = get_conf_word(d, PCI_CLASS_DEVICE);
 995       byte ht = get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f;
 996       if (class == PCI_CLASS_BRIDGE_PCI &&
 997           (ht == PCI_HEADER_TYPE_BRIDGE || ht == PCI_HEADER_TYPE_CARDBUS))
 998         {
 999           b = xmalloc(sizeof(struct bridge));
1000           if (ht == PCI_HEADER_TYPE_BRIDGE)
1001             {
1002               b->primary = get_conf_byte(d, PCI_CB_PRIMARY_BUS);
1003               b->secondary = get_conf_byte(d, PCI_CB_CARD_BUS);
1004               b->subordinate = get_conf_byte(d, PCI_CB_SUBORDINATE_BUS);
1005             }
1006           else
1007             {
1008               b->primary = get_conf_byte(d, PCI_PRIMARY_BUS);
1009               b->secondary = get_conf_byte(d, PCI_SECONDARY_BUS);
1010               b->subordinate = get_conf_byte(d, PCI_SUBORDINATE_BUS);
1011             }
1012           *last_br = b;
1013           last_br = &b->chain;
1014           b->next = b->child = NULL;
1015           b->first_bus = NULL;
1016           b->br_dev = d;
1017         }
1018     }
1019   *last_br = NULL;
1020
1021   /* Create a bridge tree */
1022
1023   for(b=&host_bridge; b; b=b->chain)
1024     {
1025       struct bridge *c, *best;
1026       best = NULL;
1027       for(c=&host_bridge; c; c=c->chain)
1028         if (c != b && b->primary >= c->secondary && b->primary <= c->subordinate &&
1029             (!best || best->subordinate - best->primary > c->subordinate - c->primary))
1030           best = c;
1031       if (best)
1032         {
1033           b->next = best->child;
1034           best->child = b;
1035         }
1036     }
1037
1038   /* Insert secondary bus for each bridge */
1039
1040   for(b=&host_bridge; b; b=b->chain)
1041     if (!find_bus(b, b->secondary))
1042       new_bus(b, b->secondary);
1043
1044   /* Create bus structs and link devices */
1045
1046   for(d=first_dev; d;)
1047     {
1048       d2 = d->next;
1049       insert_dev(d, &host_bridge);
1050       d = d2;
1051     }
1052 }
1053
1054 static void
1055 print_it(byte *line, byte *p)
1056 {
1057   *p++ = '\n';
1058   *p = 0;
1059   fputs(line, stdout);
1060   for(p=line; *p; p++)
1061     if (*p == '+' || *p == '|')
1062       *p = '|';
1063     else
1064       *p = ' ';
1065 }
1066
1067 static void show_tree_bridge(struct bridge *, byte *, byte *);
1068
1069 static void
1070 show_tree_dev(struct device *d, byte *line, byte *p)
1071 {
1072   struct pci_dev *q = d->dev;
1073   struct bridge *b;
1074   char namebuf[256];
1075
1076   p += sprintf(p, "%02x.%x", q->dev, q->func);
1077   for(b=&host_bridge; b; b=b->chain)
1078     if (b->br_dev == d)
1079       {
1080         if (b->secondary == b->subordinate)
1081           p += sprintf(p, "-[%02x]-", b->secondary);
1082         else
1083           p += sprintf(p, "-[%02x-%02x]-", b->secondary, b->subordinate);
1084         show_tree_bridge(b, line, p);
1085         return;
1086       }
1087   if (verbose)
1088     p += sprintf(p, "  %s",
1089                  pci_lookup_name(pacc, namebuf, sizeof(namebuf),
1090                                  PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
1091                                  q->vendor_id, q->device_id));
1092   print_it(line, p);
1093 }
1094
1095 static void
1096 show_tree_bus(struct bus *b, byte *line, byte *p)
1097 {
1098   if (!b->first_dev)
1099     print_it(line, p);
1100   else if (!b->first_dev->next)
1101     {
1102       *p++ = '-';
1103       *p++ = '-';
1104       show_tree_dev(b->first_dev, line, p);
1105     }
1106   else
1107     {
1108       struct device *d = b->first_dev;
1109       while (d->next)
1110         {
1111           p[0] = '+';
1112           p[1] = '-';
1113           show_tree_dev(d, line, p+2);
1114           d = d->next;
1115         }
1116       p[0] = '\\';
1117       p[1] = '-';
1118       show_tree_dev(d, line, p+2);
1119     }
1120 }
1121
1122 static void
1123 show_tree_bridge(struct bridge *b, byte *line, byte *p)
1124 {
1125   *p++ = '-';
1126   if (!b->first_bus->sibling)
1127     {
1128       if (b == &host_bridge)
1129         p += sprintf(p, "[%02x]-", b->first_bus->number);
1130       show_tree_bus(b->first_bus, line, p);
1131     }
1132   else
1133     {
1134       struct bus *u = b->first_bus;
1135       byte *k;
1136
1137       while (u->sibling)
1138         {
1139           k = p + sprintf(p, "+-[%02x]-", u->number);
1140           show_tree_bus(u, line, k);
1141           u = u->sibling;
1142         }
1143       k = p + sprintf(p, "\\-[%02x]-", u->number);
1144       show_tree_bus(u, line, k);
1145     }
1146 }
1147
1148 static void
1149 show_forest(void)
1150 {
1151   char line[256];
1152
1153   grow_tree();
1154   show_tree_bridge(&host_bridge, line, line);
1155 }
1156
1157 /* Bus mapping mode */
1158
1159 struct bus_bridge {
1160   struct bus_bridge *next;
1161   byte this, dev, func, first, last, bug;
1162 };
1163
1164 struct bus_info {
1165   byte exists;
1166   byte guestbook;
1167   struct bus_bridge *bridges, *via;
1168 };
1169
1170 static struct bus_info *bus_info;
1171
1172 static void
1173 map_bridge(struct bus_info *bi, struct device *d, int np, int ns, int nl)
1174 {
1175   struct bus_bridge *b = xmalloc(sizeof(struct bus_bridge));
1176   struct pci_dev *p = d->dev;
1177
1178   b->next = bi->bridges;
1179   bi->bridges = b;
1180   b->this = get_conf_byte(d, np);
1181   b->dev = p->dev;
1182   b->func = p->func;
1183   b->first = get_conf_byte(d, ns);
1184   b->last = get_conf_byte(d, nl);
1185   printf("## %02x.%02x:%d is a bridge from %02x to %02x-%02x\n",
1186          p->bus, p->dev, p->func, b->this, b->first, b->last);
1187   if (b->this != p->bus)
1188     printf("!!! Bridge points to invalid primary bus.\n");
1189   if (b->first > b->last)
1190     {
1191       printf("!!! Bridge points to invalid bus range.\n");
1192       b->last = b->first;
1193     }
1194 }
1195
1196 static void
1197 do_map_bus(int bus)
1198 {
1199   int dev, func;
1200   int verbose = pacc->debugging;
1201   struct bus_info *bi = bus_info + bus;
1202   struct device *d;
1203
1204   if (verbose)
1205     printf("Mapping bus %02x\n", bus);
1206   for(dev = 0; dev < 32; dev++)
1207     if (filter.slot < 0 || filter.slot == dev)
1208       {
1209         int func_limit = 1;
1210         for(func = 0; func < func_limit; func++)
1211           if (filter.func < 0 || filter.func == func)
1212             {
1213               struct pci_dev *p = pci_get_dev(pacc, bus, dev, func);
1214               u16 vendor = pci_read_word(p, PCI_VENDOR_ID);
1215               if (vendor && vendor != 0xffff)
1216                 {
1217                   if (!func && (pci_read_byte(p, PCI_HEADER_TYPE) & 0x80))
1218                     func_limit = 8;
1219                   if (verbose)
1220                     printf("Discovered device %02x:%02x.%d\n", bus, dev, func);
1221                   bi->exists = 1;
1222                   if (d = scan_device(p))
1223                     {
1224                       show_device(d);
1225                       switch (get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f)
1226                         {
1227                         case PCI_HEADER_TYPE_BRIDGE:
1228                           map_bridge(bi, d, PCI_PRIMARY_BUS, PCI_SECONDARY_BUS, PCI_SUBORDINATE_BUS);
1229                           break;
1230                         case PCI_HEADER_TYPE_CARDBUS:
1231                           map_bridge(bi, d, PCI_CB_PRIMARY_BUS, PCI_CB_CARD_BUS, PCI_CB_SUBORDINATE_BUS);
1232                           break;
1233                         }
1234                       free(d);
1235                     }
1236                   else if (verbose)
1237                     printf("But it was filtered out.\n");
1238                 }
1239               pci_free_dev(p);
1240             }
1241       }
1242 }
1243
1244 static void
1245 do_map_bridges(int bus, int min, int max)
1246 {
1247   struct bus_info *bi = bus_info + bus;
1248   struct bus_bridge *b;
1249
1250   bi->guestbook = 1;
1251   for(b=bi->bridges; b; b=b->next)
1252     {
1253       if (bus_info[b->first].guestbook)
1254         b->bug = 1;
1255       else if (b->first < min || b->last > max)
1256         b->bug = 2;
1257       else
1258         {
1259           bus_info[b->first].via = b;
1260           do_map_bridges(b->first, b->first, b->last);
1261         }
1262     }
1263 }
1264
1265 static void
1266 map_bridges(void)
1267 {
1268   int i;
1269
1270   printf("\nSummary of buses:\n\n");
1271   for(i=0; i<256; i++)
1272     if (bus_info[i].exists && !bus_info[i].guestbook)
1273       do_map_bridges(i, 0, 255);
1274   for(i=0; i<256; i++)
1275     {
1276       struct bus_info *bi = bus_info + i;
1277       struct bus_bridge *b = bi->via;
1278
1279       if (bi->exists)
1280         {
1281           printf("%02x: ", i);
1282           if (b)
1283             printf("Entered via %02x:%02x.%d\n", b->this, b->dev, b->func);
1284           else if (!i)
1285             printf("Primary host bus\n");
1286           else
1287             printf("Secondary host bus (?)\n");
1288         }
1289       for(b=bi->bridges; b; b=b->next)
1290         {
1291           printf("\t%02x.%d Bridge to %02x-%02x", b->dev, b->func, b->first, b->last);
1292           switch (b->bug)
1293             {
1294             case 1:
1295               printf(" <overlap bug>");
1296               break;
1297             case 2:
1298               printf(" <crossing bug>");
1299               break;
1300             }
1301           putchar('\n');
1302         }
1303     }
1304 }
1305
1306 static void
1307 map_the_bus(void)
1308 {
1309   if (pacc->method == PCI_ACCESS_PROC_BUS_PCI ||
1310       pacc->method == PCI_ACCESS_DUMP)
1311     printf("WARNING: Bus mapping can be reliable only with direct hardware access enabled.\n\n");
1312   else if (!check_root())
1313     die("Only root can map the bus.");
1314   bus_info = xmalloc(sizeof(struct bus_info) * 256);
1315   bzero(bus_info, sizeof(struct bus_info) * 256);
1316   if (filter.bus >= 0)
1317     do_map_bus(filter.bus);
1318   else
1319     {
1320       int bus;
1321       for(bus=0; bus<256; bus++)
1322         do_map_bus(bus);
1323     }
1324   map_bridges();
1325 }
1326
1327 /* Main */
1328
1329 int
1330 main(int argc, char **argv)
1331 {
1332   int i;
1333   char *msg;
1334
1335   if (argc == 2 && !strcmp(argv[1], "--version"))
1336     {
1337       puts("lspci version " PCIUTILS_VERSION);
1338       return 0;
1339     }
1340
1341   pacc = pci_alloc();
1342   pacc->error = die;
1343   pci_filter_init(pacc, &filter);
1344
1345   while ((i = getopt(argc, argv, options)) != -1)
1346     switch (i)
1347       {
1348       case 'n':
1349         pacc->numeric_ids = 1;
1350         break;
1351       case 'v':
1352         verbose++;
1353         break;
1354       case 'b':
1355         pacc->buscentric = 1;
1356         buscentric_view = 1;
1357         break;
1358       case 's':
1359         if (msg = pci_filter_parse_slot(&filter, optarg))
1360           die("-f: %s", msg);
1361         break;
1362       case 'd':
1363         if (msg = pci_filter_parse_id(&filter, optarg))
1364           die("-d: %s", msg);
1365         break;
1366       case 'x':
1367         show_hex++;
1368         break;
1369       case 't':
1370         show_tree++;
1371         break;
1372       case 'i':
1373         pacc->id_file_name = optarg;
1374         break;
1375       case 'm':
1376         machine_readable++;
1377         break;
1378       case 'M':
1379         map_mode++;
1380         break;
1381       default:
1382         if (parse_generic_option(i, pacc, optarg))
1383           break;
1384       bad:
1385         fprintf(stderr, help_msg, pacc->id_file_name);
1386         return 1;
1387       }
1388   if (optind < argc)
1389     goto bad;
1390
1391   pci_init(pacc);
1392   if (map_mode)
1393     map_the_bus();
1394   else
1395     {
1396       scan_devices();
1397       sort_them();
1398       if (show_tree)
1399         show_forest();
1400       else
1401         show();
1402     }
1403   pci_cleanup(pacc);
1404
1405   return 0;
1406 }