lspci.c

The PCI Utilities package contains a library for portable access to PCI bus configuration registers

	printf("\tMemory window %d: %08x-%08x%s%s\n", i, base, limit,
	       (cmd & PCI_COMMAND_MEMORY) ? "" : " [disabled]",
	       (brc & (PCI_CB_BRIDGE_CTL_PREFETCH_MEM0 << i)) ? " (prefetchable)" : "");
    }
  for(i=0; i<2; i++)
    {
      int p = 8*i;
      u32 base = get_conf_long(d, PCI_CB_IO_BASE_0 + p);
      u32 limit = get_conf_long(d, PCI_CB_IO_LIMIT_0 + p);
      if (!(base & PCI_IO_RANGE_TYPE_32))
	{
	  base &= 0xffff;
	  limit &= 0xffff;
	}
      base &= PCI_CB_IO_RANGE_MASK;
      limit = (limit & PCI_CB_IO_RANGE_MASK) + 3;
      if (base <= limit || verb)
	printf("\tI/O window %d: %08x-%08x%s\n", i, base, limit,
	       (cmd & PCI_COMMAND_IO) ? "" : " [disabled]");
    }

  if (get_conf_word(d, PCI_CB_SEC_STATUS) & PCI_STATUS_SIG_SYSTEM_ERROR)
    printf("\tSecondary status: SERR\n");
  if (verbose > 1)
    printf("\tBridgeCtl: Parity%c SERR%c ISA%c VGA%c MAbort%c >Reset%c 16bInt%c PostWrite%c\n",
	   FLAG(brc, PCI_CB_BRIDGE_CTL_PARITY),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_SERR),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_ISA),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_VGA),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_MASTER_ABORT),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_CB_RESET),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_16BIT_INT),
	   FLAG(brc, PCI_CB_BRIDGE_CTL_POST_WRITES));

  if (d->config_cached < 128)
    {
      printf("\t<access denied to the rest>\n");
      return;
    }

  exca = get_conf_word(d, PCI_CB_LEGACY_MODE_BASE);
  if (exca)
    printf("\t16-bit legacy interface ports at %04x\n", exca);
}

static void
show_verbose(struct device *d)
{
  struct pci_dev *p = d->dev;
  word status = get_conf_word(d, PCI_STATUS);
  word cmd = get_conf_word(d, PCI_COMMAND);
  word class = p->device_class;
  byte bist = get_conf_byte(d, PCI_BIST);
  byte htype = get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f;
  byte latency = get_conf_byte(d, PCI_LATENCY_TIMER);
  byte cache_line = get_conf_byte(d, PCI_CACHE_LINE_SIZE);
  byte max_lat, min_gnt;
  byte int_pin = get_conf_byte(d, PCI_INTERRUPT_PIN);
  unsigned int irq = p->irq;
  word subsys_v = 0, subsys_d = 0;
  char ssnamebuf[256];

  show_terse(d);

  switch (htype)
    {
    case PCI_HEADER_TYPE_NORMAL:
      if (class == PCI_CLASS_BRIDGE_PCI)
	printf("\t!!! Invalid class %04x for header type %02x\n", class, htype);
      max_lat = get_conf_byte(d, PCI_MAX_LAT);
      min_gnt = get_conf_byte(d, PCI_MIN_GNT);
      subsys_v = get_conf_word(d, PCI_SUBSYSTEM_VENDOR_ID);
      subsys_d = get_conf_word(d, PCI_SUBSYSTEM_ID);
      break;
    case PCI_HEADER_TYPE_BRIDGE:
      if ((class >> 8) != PCI_BASE_CLASS_BRIDGE)
	printf("\t!!! Invalid class %04x for header type %02x\n", class, htype);
      irq = int_pin = min_gnt = max_lat = 0;
      break;
    case PCI_HEADER_TYPE_CARDBUS:
      if ((class >> 8) != PCI_BASE_CLASS_BRIDGE)
	printf("\t!!! Invalid class %04x for header type %02x\n", class, htype);
      min_gnt = max_lat = 0;
      if (d->config_cached >= 128)
	{
	  subsys_v = get_conf_word(d, PCI_CB_SUBSYSTEM_VENDOR_ID);
	  subsys_d = get_conf_word(d, PCI_CB_SUBSYSTEM_ID);
	}
      break;
    default:
      printf("\t!!! Unknown header type %02x\n", htype);
      return;
    }

  if (subsys_v && subsys_v != 0xffff)
    printf("\tSubsystem: %s\n",
	   pci_lookup_name(pacc, ssnamebuf, sizeof(ssnamebuf),
			   PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR | PCI_LOOKUP_DEVICE,
			   p->vendor_id, p->device_id, subsys_v, subsys_d));

  if (verbose > 1)
    {
      printf("\tControl: I/O%c Mem%c BusMaster%c SpecCycle%c MemWINV%c VGASnoop%c ParErr%c Stepping%c SERR%c FastB2B%c DisINTx%c\n",
	     FLAG(cmd, PCI_COMMAND_IO),
	     FLAG(cmd, PCI_COMMAND_MEMORY),
	     FLAG(cmd, PCI_COMMAND_MASTER),
	     FLAG(cmd, PCI_COMMAND_SPECIAL),
	     FLAG(cmd, PCI_COMMAND_INVALIDATE),
	     FLAG(cmd, PCI_COMMAND_VGA_PALETTE),
	     FLAG(cmd, PCI_COMMAND_PARITY),
	     FLAG(cmd, PCI_COMMAND_WAIT),
	     FLAG(cmd, PCI_COMMAND_SERR),
	     FLAG(cmd, PCI_COMMAND_FAST_BACK),
	     FLAG(cmd, PCI_COMMAND_DISABLE_INTx));
      printf("\tStatus: Cap%c 66MHz%c UDF%c FastB2B%c ParErr%c DEVSEL=%s >TAbort%c <TAbort%c <MAbort%c >SERR%c <PERR%c INTx%c\n",
	     FLAG(status, PCI_STATUS_CAP_LIST),
	     FLAG(status, PCI_STATUS_66MHZ),
	     FLAG(status, PCI_STATUS_UDF),
	     FLAG(status, PCI_STATUS_FAST_BACK),
	     FLAG(status, PCI_STATUS_PARITY),
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_SLOW) ? "slow" :
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_MEDIUM) ? "medium" :
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_FAST) ? "fast" : "??",
	     FLAG(status, PCI_STATUS_SIG_TARGET_ABORT),
	     FLAG(status, PCI_STATUS_REC_TARGET_ABORT),
	     FLAG(status, PCI_STATUS_REC_MASTER_ABORT),
	     FLAG(status, PCI_STATUS_SIG_SYSTEM_ERROR),
	     FLAG(status, PCI_STATUS_DETECTED_PARITY),
	     FLAG(status, PCI_STATUS_INTx));
      if (cmd & PCI_COMMAND_MASTER)
	{
	  printf("\tLatency: %d", latency);
	  if (min_gnt || max_lat)
	    {
	      printf(" (");
	      if (min_gnt)
		printf("%dns min", min_gnt*250);
	      if (min_gnt && max_lat)
		printf(", ");
	      if (max_lat)
		printf("%dns max", max_lat*250);
	      putchar(')');
	    }
	  if (cache_line)
	    printf(", Cache Line Size: %d bytes", cache_line * 4);
	  putchar('\n');
	}
      if (int_pin || irq)
	printf("\tInterrupt: pin %c routed to IRQ " PCIIRQ_FMT "\n",
	       (int_pin ? 'A' + int_pin - 1 : '?'), irq);
    }
  else
    {
      printf("\tFlags: ");
      if (cmd & PCI_COMMAND_MASTER)
	printf("bus master, ");
      if (cmd & PCI_COMMAND_VGA_PALETTE)
	printf("VGA palette snoop, ");
      if (cmd & PCI_COMMAND_WAIT)
	printf("stepping, ");
      if (cmd & PCI_COMMAND_FAST_BACK)
	printf("fast Back2Back, ");
      if (status & PCI_STATUS_66MHZ)
	printf("66MHz, ");
      if (status & PCI_STATUS_UDF)
	printf("user-definable features, ");
      printf("%s devsel",
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_SLOW) ? "slow" :
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_MEDIUM) ? "medium" :
	     ((status & PCI_STATUS_DEVSEL_MASK) == PCI_STATUS_DEVSEL_FAST) ? "fast" : "??");
      if (cmd & PCI_COMMAND_MASTER)
	printf(", latency %d", latency);
      if (irq)
	printf(", IRQ " PCIIRQ_FMT, irq);
      putchar('\n');
    }

  if (bist & PCI_BIST_CAPABLE)
    {
      if (bist & PCI_BIST_START)
	printf("\tBIST is running\n");
      else
	printf("\tBIST result: %02x\n", bist & PCI_BIST_CODE_MASK);
    }

  switch (htype)
    {
    case PCI_HEADER_TYPE_NORMAL:
      show_htype0(d);
      break;
    case PCI_HEADER_TYPE_BRIDGE:
      show_htype1(d);
      break;
    case PCI_HEADER_TYPE_CARDBUS:
      show_htype2(d);
      break;
    }
}

/*** Machine-readable dumps ***/

static void
show_hex_dump(struct device *d)
{
  unsigned int i, cnt;

  cnt = d->config_cached;
  if (opt_hex >= 3 && config_fetch(d, cnt, 256-cnt))
    {
      cnt = 256;
      if (opt_hex >= 4 && config_fetch(d, 256, 4096-256))
	cnt = 4096;
    }

  for(i=0; i<cnt; i++)
    {
      if (! (i & 15))
	printf("%02x:", i);
      printf(" %02x", get_conf_byte(d, i));
      if ((i & 15) == 15)
	putchar('\n');
    }
}

static void
print_shell_escaped(char *c)
{
  printf(" \"");
  while (*c)
    {
      if (*c == '"' || *c == '\\')
	putchar('\\');
      putchar(*c++);
    }
  putchar('"');
}

static void
show_machine(struct device *d)
{
  struct pci_dev *p = d->dev;
  int c;
  word sv_id=0, sd_id=0;
  char classbuf[128], vendbuf[128], devbuf[128], svbuf[128], sdbuf[128];

  switch (get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f)
    {
    case PCI_HEADER_TYPE_NORMAL:
      sv_id = get_conf_word(d, PCI_SUBSYSTEM_VENDOR_ID);
      sd_id = get_conf_word(d, PCI_SUBSYSTEM_ID);
      break;
    case PCI_HEADER_TYPE_CARDBUS:
      if (d->config_cached >= 128)
	{
	  sv_id = get_conf_word(d, PCI_CB_SUBSYSTEM_VENDOR_ID);
	  sd_id = get_conf_word(d, PCI_CB_SUBSYSTEM_ID);
	}
      break;
    }

  if (verbose)
    {
      printf((opt_machine >= 2) ? "Slot:\t" : "Device:\t");
      show_slot_name(d);
      putchar('\n');
      printf("Class:\t%s\n",
	     pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS, p->device_class));
      printf("Vendor:\t%s\n",
	     pci_lookup_name(pacc, vendbuf, sizeof(vendbuf), PCI_LOOKUP_VENDOR, p->vendor_id, p->device_id));
      printf("Device:\t%s\n",
	     pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, p->vendor_id, p->device_id));
      if (sv_id && sv_id != 0xffff)
	{
	  printf("SVendor:\t%s\n",
		 pci_lookup_name(pacc, svbuf, sizeof(svbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR, sv_id));
	  printf("SDevice:\t%s\n",
		 pci_lookup_name(pacc, sdbuf, sizeof(sdbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE, p->vendor_id, p->device_id, sv_id, sd_id));
	}
      if (c = get_conf_byte(d, PCI_REVISION_ID))
	printf("Rev:\t%02x\n", c);
      if (c = get_conf_byte(d, PCI_CLASS_PROG))
	printf("ProgIf:\t%02x\n", c);
    }
  else
    {
      show_slot_name(d);
      print_shell_escaped(pci_lookup_name(pacc, classbuf, sizeof(classbuf), PCI_LOOKUP_CLASS, p->device_class));
      print_shell_escaped(pci_lookup_name(pacc, vendbuf, sizeof(vendbuf), PCI_LOOKUP_VENDOR, p->vendor_id, p->device_id));
      print_shell_escaped(pci_lookup_name(pacc, devbuf, sizeof(devbuf), PCI_LOOKUP_DEVICE, p->vendor_id, p->device_id));
      if (c = get_conf_byte(d, PCI_REVISION_ID))
	printf(" -r%02x", c);
      if (c = get_conf_byte(d, PCI_CLASS_PROG))
	printf(" -p%02x", c);
      if (sv_id && sv_id != 0xffff)
	{
	  print_shell_escaped(pci_lookup_name(pacc, svbuf, sizeof(svbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_VENDOR, sv_id));
	  print_shell_escaped(pci_lookup_name(pacc, sdbuf, sizeof(sdbuf), PCI_LOOKUP_SUBSYSTEM | PCI_LOOKUP_DEVICE, p->vendor_id, p->device_id, sv_id, sd_id));
	}
      else
	printf(" \"\" \"\"");
      putchar('\n');
    }
}

/*** Main show function ***/

static void
show_device(struct device *d)
{
  if (opt_machine)
    show_machine(d);
  else if (verbose)
    show_verbose(d);
  else
    show_terse(d);
  if (opt_hex)
    show_hex_dump(d);
  if (verbose || opt_hex)
    putchar('\n');
}

static void
show(void)
{
  struct device *d;

  for(d=first_dev; d; d=d->next)
    show_device(d);
}

/*** Tree output ***/

struct bridge {
  struct bridge *chain;			/* Single-linked list of bridges */
  struct bridge *next, *child;		/* Tree of bridges */
  struct bus *first_bus;		/* List of buses connected to this bridge */
  unsigned int domain;
  unsigned int primary, secondary, subordinate;	/* Bus numbers */
  struct device *br_dev;
};

struct bus {
  unsigned int domain;
  unsigned int number;
  struct bus *sibling;
  struct device *first_dev, **last_dev;
};

static struct bridge host_bridge = { NULL, NULL, NULL, NULL, 0, ~0, 0, ~0, NULL };

static struct bus *
find_bus(struct bridge *b, unsigned int domain, unsigned int n)
{
  struct bus *bus;

  for(bus=b->first_bus; bus; bus=bus->sibling)
    if (bus->domain == domain && bus->number == n)
      break;
  return bus;
}

static struct bus *
new_bus(struct bridge *b, unsigned int domain, unsigned int n)
{
  struct bus *bus = xmalloc(sizeof(struct bus));
  bus->domain = domain;
  bus->number = n;
  bus->sibling = b->first_bus;
  bus->first_dev = NULL;
  bus->last_dev = &bus->first_dev;
  b->first_bus = bus;
  return bus;
}

static void
insert_dev(struct device *d, struct bridge *b)
{
  struct pci_dev *p = d->dev;
  struct bus *bus;

  if (! (bus = find_bus(b, p->domain, p->bus)))
    {
      struct bridge *c;
      for(c=b->child; c; c=c->next)
	if (c->domain == p->domain && c->secondary <= p->bus && p->bus <= c->subordinate)
          {
            insert_dev(d, c);
            return;
          }
      bus = new_bus(b, p->domain, p->bus);
    }
  /* Simple insertion at the end _does_ guarantee the correct order as the
   * original device list was sorted by (domain, bus, devfn) lexicographically
   * and all devices on the new list have the same bus number.
   */
  *bus->last_dev = d;
  bus->last_dev = &d->next;
  d->next = NULL;
}

static void
grow_tree(void)
{
  struct device *d, *d2;
  struct bridge **last_br, *b;

  /* Build list of bridges */

  last_br = &host_bridge.chain;
  for(d=first_dev; d; d=d->next)
    {
      word class = d->dev->device_class;
      byte ht = get_conf_byte(d, PCI_HEADER_TYPE) & 0x7f;
      if (class == PCI_CLASS_BRIDGE_PCI &&
	  (ht == PCI_HEADER_TYPE_BRIDGE || ht == PCI_HEADER_TYPE_CARDBUS))
	{
	  b = xmalloc(sizeof(struct bridge));
	  b->domain = d->dev->domain;
	  if (ht == PCI_HEADER_TYPE_BRIDGE)
	    {
	      b->primary = get_conf_byte(d, PCI_PRIMARY_BUS);
	      b->secondary = get_conf_byte(d, PCI_SECONDARY_BUS);
	      b->subordinate = get_conf_byte(d, PCI_SUBORDINATE_BUS);
	    }
	  else
	    {
	      b->primary = get_conf_byte(d, PCI_CB_PRIMARY_BUS);
	      b->secondary = get_conf_byte(d, PCI_CB_CARD_BUS);
	      b->subordin