static void
platform_find_pci_info(struct xf86_platform_device *pd, char *busid)
{
struct pci_slot_match devmatch;
struct pci_device *info;
struct pci_device_iterator *iter;
int ret;
ret = sscanf(busid, "pci:%04x:%02x:%02x.%u",
&devmatch.domain, &devmatch.bus, &devmatch.dev,
&devmatch.func);
if (ret != 4)
return;
iter = pci_slot_match_iterator_create(&devmatch);
info = pci_device_next(iter);
if (info) {
pd->pdev = info;
pci_device_probe(info);
if (pci_device_is_boot_vga(info)) {
primaryBus.type = BUS_PLATFORM;
primaryBus.id.plat = pd;
}
}
pci_iterator_destroy(iter);
}
static struct pci_device*
ati_device_get_primary(void)
{
struct pci_device *device = NULL;
struct pci_device_iterator *device_iter;
device_iter = pci_slot_match_iterator_create(NULL);
while ((device = pci_device_next(device_iter)) != NULL) {
if (xf86IsPrimaryPci(device))
break;
}
pci_iterator_destroy(device_iter);
return device;
}
static struct pci_device *
ati_device_get_indexed(int index)
{
struct pci_device *device = NULL;
struct pci_device_iterator *device_iter;
int count = 0;
device_iter = pci_slot_match_iterator_create(NULL);
while ((device = pci_device_next(device_iter)) != NULL) {
if (device->vendor_id == PCI_VENDOR_ATI) {
if (count == index)
return device;
count++;
}
}
return NULL;
}
static void
pci_userspace_init(void)
{
/* FIXME: add a hook to make rump call this, once and only once */
static int is_init = 0;
if (is_init)
return;
is_init = 1;
if (get_privileged_ports (&master_host, &master_device))
err(1, "get_privileged_ports");
pci_system_init ();
struct pci_device_iterator *dev_iter;
struct pci_device *pci_dev;
dev_iter = pci_slot_match_iterator_create (NULL);
int i = 0;
while ((pci_dev = pci_device_next (dev_iter)) != NULL) {
pci_devices[i++] = pci_dev;
}
}
static int
hwloc_look_pci(struct hwloc_backend *backend)
{
struct hwloc_topology *topology = backend->topology;
struct hwloc_obj *first_obj = NULL, *last_obj = NULL;
int ret;
struct pci_device_iterator *iter;
struct pci_device *pcidev;
#ifdef HWLOC_LINUX_SYS
DIR *dir;
#endif
if (!(hwloc_topology_get_flags(topology) & (HWLOC_TOPOLOGY_FLAG_IO_DEVICES|HWLOC_TOPOLOGY_FLAG_WHOLE_IO)))
return 0;
if (hwloc_get_next_pcidev(topology, NULL)) {
hwloc_debug("%s", "PCI objects already added, ignoring pci backend.\n");
return 0;
}
if (!hwloc_topology_is_thissystem(topology)) {
hwloc_debug("%s", "\nno PCI detection (not thissystem)\n");
return 0;
}
hwloc_debug("%s", "\nScanning PCI buses...\n");
/* initialize PCI scanning */
ret = pci_system_init();
if (ret) {
hwloc_debug("%s", "Can not initialize libpciaccess\n");
return -1;
}
iter = pci_slot_match_iterator_create(NULL);
/* iterate over devices */
for (pcidev = pci_device_next(iter);
pcidev;
pcidev = pci_device_next(iter))
{
const char *vendorname, *devicename, *fullname;
unsigned char config_space_cache[CONFIG_SPACE_CACHESIZE];
struct hwloc_obj *obj;
unsigned os_index;
unsigned domain;
unsigned device_class;
unsigned short tmp16;
char name[128];
unsigned offset;
/* initialize the config space in case we fail to read it (missing permissions, etc). */
memset(config_space_cache, 0xff, CONFIG_SPACE_CACHESIZE);
pci_device_probe(pcidev);
pci_device_cfg_read(pcidev, config_space_cache, 0, CONFIG_SPACE_CACHESIZE, NULL);
/* try to read the domain */
domain = pcidev->domain;
/* try to read the device_class */
device_class = pcidev->device_class >> 8;
/* fixup SR-IOV buggy VF device/vendor IDs */
if (0xffff == pcidev->vendor_id && 0xffff == pcidev->device_id) {
/* SR-IOV puts ffff:ffff in Virtual Function config space.
* The actual VF device ID is stored at a special (dynamic) location in the Physical Function config space.
* VF and PF have the same vendor ID.
*
* libpciaccess just returns ffff:ffff, needs to be fixed.
* linuxpci is OK because sysfs files are already fixed the kernel.
* (pciutils is OK when it uses those Linux sysfs files.)
*
* Reading these files is an easy way to work around the libpciaccess issue on Linux,
* but we have no way to know if this is caused by SR-IOV or not.
*
* TODO:
* If PF has CAP_ID_PCIX or CAP_ID_EXP (offset>0),
* look for extended capability PCI_EXT_CAP_ID_SRIOV (need extended config space (more than 256 bytes)),
* then read the VF device ID after it (PCI_IOV_DID bytes later).
* Needs access to extended config space (needs root on Linux).
* TODO:
* Add string info attributes in VF and PF objects?
*/
#ifdef HWLOC_LINUX_SYS
/* Workaround for Linux (the kernel returns the VF device/vendor IDs). */
char path[64];
char value[16];
FILE *file;
size_t read;
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/vendor",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
read = fread(value, 1, sizeof(value), file);
fclose(file);
if (read)
/* fixup the pciaccess struct so that pci_device_get_vendor_name() is correct later. */
pcidev->vendor_id = strtoul(value, NULL, 16);
}
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/device",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
read = fread(value, 1, sizeof(value), file);
fclose(file);
if (read)
/* fixup the pciaccess struct so that pci_device_get_device_name() is correct later. */
pcidev->device_id = strtoul(value, NULL, 16);
}
#endif
}
/* might be useful for debugging (note that domain might be truncated) */
os_index = (domain << 20) + (pcidev->bus << 12) + (pcidev->dev << 4) + pcidev->func;
obj = hwloc_alloc_setup_object(HWLOC_OBJ_PCI_DEVICE, os_index);
obj->attr->pcidev.domain = domain;
obj->attr->pcidev.bus = pcidev->bus;
obj->attr->pcidev.dev = pcidev->dev;
obj->attr->pcidev.func = pcidev->func;
obj->attr->pcidev.vendor_id = pcidev->vendor_id;
obj->attr->pcidev.device_id = pcidev->device_id;
obj->attr->pcidev.class_id = device_class;
obj->attr->pcidev.revision = config_space_cache[PCI_REVISION_ID];
obj->attr->pcidev.linkspeed = 0; /* unknown */
offset = hwloc_pci_find_cap(config_space_cache, PCI_CAP_ID_EXP);
if (offset > 0 && offset + 20 /* size of PCI express block up to link status */ <= CONFIG_SPACE_CACHESIZE)
hwloc_pci_find_linkspeed(config_space_cache, offset, &obj->attr->pcidev.linkspeed);
hwloc_pci_prepare_bridge(obj, config_space_cache);
if (obj->type == HWLOC_OBJ_PCI_DEVICE) {
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_VENDOR_ID], sizeof(tmp16));
obj->attr->pcidev.subvendor_id = tmp16;
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_ID], sizeof(tmp16));
obj->attr->pcidev.subdevice_id = tmp16;
} else {
/* TODO:
* bridge must lookup PCI_CAP_ID_SSVID and then look at offset+PCI_SSVID_VENDOR/DEVICE_ID
* cardbus must look at PCI_CB_SUBSYSTEM_VENDOR_ID and PCI_CB_SUBSYSTEM_ID
*/
}
/* get the vendor name */
vendorname = pci_device_get_vendor_name(pcidev);
if (vendorname && *vendorname)
hwloc_obj_add_info(obj, "PCIVendor", vendorname);
/* get the device name */
devicename = pci_device_get_device_name(pcidev);
if (devicename && *devicename)
hwloc_obj_add_info(obj, "PCIDevice", devicename);
/* generate or get the fullname */
snprintf(name, sizeof(name), "%s%s%s",
vendorname ? vendorname : "",
vendorname && devicename ? " " : "",
devicename ? devicename : "");
fullname = name;
if (*name)
obj->name = strdup(name);
hwloc_debug(" %04x:%02x:%02x.%01x %04x %04x:%04x %s\n",
domain, pcidev->bus, pcidev->dev, pcidev->func,
device_class, pcidev->vendor_id, pcidev->device_id,
fullname && *fullname ? fullname : "??");
/* queue the object for now */
if (first_obj)
last_obj->next_sibling = obj;
else
first_obj = obj;
last_obj = obj;
}
/* finalize device scanning */
pci_iterator_destroy(iter);
pci_system_cleanup();
#ifdef HWLOC_LINUX_SYS
dir = opendir("/sys/bus/pci/slots/");
if (dir) {
struct dirent *dirent;
while ((dirent = readdir(dir)) != NULL) {
char path[64];
FILE *file;
if (dirent->d_name[0] == '.')
continue;
snprintf(path, sizeof(path), "/sys/bus/pci/slots/%s/address", dirent->d_name);
file = fopen(path, "r");
if (file) {
unsigned domain, bus, dev;
if (fscanf(file, "%x:%x:%x", &domain, &bus, &dev) == 3) {
hwloc_obj_t obj = first_obj;
while (obj) {
if (obj->attr->pcidev.domain == domain
&& obj->attr->pcidev.bus == bus
&& obj->attr->pcidev.dev == dev
&& obj->attr->pcidev.func == 0) {
hwloc_obj_add_info(obj, "PCISlot", dirent->d_name);
break;
}
obj = obj->next_sibling;
}
}
fclose(file);
}
}
closedir(dir);
}
#endif
return hwloc_insert_pci_device_list(backend, first_obj);
}
void
xf86PciProbe(void)
{
int i = 0, k;
int num = 0;
struct pci_device *info;
struct pci_device_iterator *iter;
struct pci_device **xf86PciVideoInfo = NULL;
if (!xf86scanpci()) {
xf86PciVideoInfo = NULL;
return;
}
iter = pci_slot_match_iterator_create(&xf86IsolateDevice);
while ((info = pci_device_next(iter)) != NULL) {
if (PCIINFOCLASSES(info->device_class)) {
num++;
xf86PciVideoInfo = xnfreallocarray(xf86PciVideoInfo,
num + 1,
sizeof(struct pci_device *));
xf86PciVideoInfo[num] = NULL;
xf86PciVideoInfo[num - 1] = info;
pci_device_probe(info);
if (primaryBus.type == BUS_NONE && pci_device_is_boot_vga(info)) {
primaryBus.type = BUS_PCI;
primaryBus.id.pci = info;
}
info->user_data = 0;
}
}
free(iter);
/* If we haven't found a primary device try a different heuristic */
if (primaryBus.type == BUS_NONE && num) {
for (i = 0; i < num; i++) {
uint16_t command;
info = xf86PciVideoInfo[i];
pci_device_cfg_read_u16(info, &command, 4);
if ((command & PCI_CMD_MEM_ENABLE)
&& ((num == 1) || IS_VGA(info->device_class))) {
if (primaryBus.type == BUS_NONE) {
primaryBus.type = BUS_PCI;
primaryBus.id.pci = info;
}
else {
xf86Msg(X_NOTICE,
"More than one possible primary device found\n");
primaryBus.type ^= (BusType) (-1);
}
}
}
}
/* Print a summary of the video devices found */
for (k = 0; k < num; k++) {
const char *prim = " ";
Bool memdone = FALSE, iodone = FALSE;
info = xf86PciVideoInfo[k];
if (!PCIALWAYSPRINTCLASSES(info->device_class))
continue;
if (xf86IsPrimaryPci(info))
prim = "*";
xf86Msg(X_PROBED, "PCI:%s(%u:%u:%u:%u) %04x:%04x:%04x:%04x ", prim,
info->domain, info->bus, info->dev, info->func,
info->vendor_id, info->device_id,
info->subvendor_id, info->subdevice_id);
xf86ErrorF("rev %d", info->revision);
for (i = 0; i < 6; i++) {
struct pci_mem_region *r = &info->regions[i];
if (r->size && !r->is_IO) {
if (!memdone) {
xf86ErrorF(", Mem @ ");
memdone = TRUE;
}
else
xf86ErrorF(", ");
xf86ErrorF("0x%08lx/%ld", (long) r->base_addr, (long) r->size);
}
}
for (i = 0; i < 6; i++) {
struct pci_mem_region *r = &info->regions[i];
if (r->size && r->is_IO) {
if (!iodone) {
xf86ErrorF(", I/O @ ");
iodone = TRUE;
}
else
xf86ErrorF(", ");
xf86ErrorF("0x%08lx/%ld", (long) r->base_addr, (long) r->size);
}
}
if (info->rom_size) {
xf86ErrorF(", BIOS @ 0x\?\?\?\?\?\?\?\?/%ld",
(long) info->rom_size);
}
xf86ErrorF("\n");
}
free(xf86PciVideoInfo);
}
/* This function is used to provide a workaround for binary drivers that
* don't export their PCI ID's properly. If distros don't end up using this
* feature it can and should be removed because the symbol-based resolution
* scheme should be the primary one */
static void
matchDriverFromFiles (char** matches, uint16_t match_vendor, uint16_t match_chip)
{
DIR *idsdir;
FILE *fp;
struct dirent *direntry;
char *line = NULL;
size_t len;
ssize_t read;
char path_name[256], vendor_str[5], chip_str[5];
uint16_t vendor, chip;
int i, j;
idsdir = opendir(PCI_TXT_IDS_PATH);
if (!idsdir)
return;
xf86Msg(X_INFO, "Scanning %s directory for additional PCI ID's supported by the drivers\n", PCI_TXT_IDS_PATH);
direntry = readdir(idsdir);
/* Read the directory */
while (direntry) {
if (direntry->d_name[0] == '.') {
direntry = readdir(idsdir);
continue;
}
len = strlen(direntry->d_name);
/* A tiny bit of sanity checking. We should probably do better */
if (strncmp(&(direntry->d_name[len-4]), ".ids", 4) == 0) {
/* We need the full path name to open the file */
strncpy(path_name, PCI_TXT_IDS_PATH, 256);
strncat(path_name, "/", 1);
strncat(path_name, direntry->d_name, (256 - strlen(path_name) - 1));
fp = fopen(path_name, "r");
if (fp == NULL) {
xf86Msg(X_ERROR, "Could not open %s for reading. Exiting.\n", path_name);
goto end;
}
/* Read the file */
#ifdef __GLIBC__
while ((read = getline(&line, &len, fp)) != -1) {
#else
while ((line = fgetln(fp, &len)) != (char *)NULL) {
#endif /* __GLIBC __ */
xchomp(line);
if (isdigit(line[0])) {
strncpy(vendor_str, line, 4);
vendor_str[4] = '\0';
vendor = (int)strtol(vendor_str, NULL, 16);
if ((strlen(&line[4])) == 0) {
chip_str[0] = '\0';
chip = -1;
} else {
/* Handle trailing whitespace */
if (isspace(line[4])) {
chip_str[0] = '\0';
chip = -1;
} else {
/* Ok, it's a real ID */
strncpy(chip_str, &line[4], 4);
chip_str[4] = '\0';
chip = (int)strtol(chip_str, NULL, 16);
}
}
if (vendor == match_vendor && chip == match_chip ) {
i = 0;
while (matches[i]) {
i++;
}
matches[i] = (char*)xalloc(sizeof(char) * strlen(direntry->d_name) - 3);
if (!matches[i]) {
xf86Msg(X_ERROR, "Could not allocate space for the module name. Exiting.\n");
goto end;
}
/* hack off the .ids suffix. This should guard
* against other problems, but it will end up
* taking off anything after the first '.' */
for (j = 0; j < (strlen(direntry->d_name) - 3) ; j++) {
if (direntry->d_name[j] == '.') {
matches[i][j] = '\0';
break;
} else {
matches[i][j] = direntry->d_name[j];
}
}
xf86Msg(X_INFO, "Matched %s from file name %s\n", matches[i], direntry->d_name);
}
} else {
/* TODO Handle driver overrides here */
}
}
fclose(fp);
}
direntry = readdir(idsdir);
}
end:
xfree(line);
closedir(idsdir);
}
#endif /* __linux__ */
static void
listPossibleVideoDrivers(char *matches[], int nmatches)
{
struct pci_device * info = NULL;
struct pci_device_iterator *iter;
int i;
for (i = 0 ; i < nmatches ; i++) {
matches[i] = NULL;
}
i = 0;
#ifdef sun
/* Check for driver type based on /dev/fb type and if valid, use
it instead of PCI bus probe results */
if (xf86Info.consoleFd >= 0) {
struct vis_identifier visid;
const char *cp;
extern char xf86SolarisFbDev[PATH_MAX];
int iret;
SYSCALL(iret = ioctl(xf86Info.consoleFd, VIS_GETIDENTIFIER, &visid));
if (iret < 0) {
int fbfd;
fbfd = open(xf86SolarisFbDev, O_RDONLY);
if (fbfd >= 0) {
SYSCALL(iret = ioctl(fbfd, VIS_GETIDENTIFIER, &visid));
close(fbfd);
}
}
if (iret < 0) {
xf86Msg(X_WARNING,
"could not get frame buffer identifier from %s\n",
xf86SolarisFbDev);
} else {
xf86Msg(X_PROBED, "console driver: %s\n", visid.name);
/* Special case from before the general case was set */
if (strcmp(visid.name, "NVDAnvda") == 0) {
matches[i++] = xnfstrdup("nvidia");
}
/* General case - split into vendor name (initial all-caps
prefix) & driver name (rest of the string). */
if (strcmp(visid.name, "SUNWtext") != 0) {
for (cp = visid.name; (*cp != '\0') && isupper(*cp); cp++) {
/* find end of all uppercase vendor section */
}
if ((cp != visid.name) && (*cp != '\0')) {
char *driverName = xnfstrdup(cp);
char *vendorName = xnfstrdup(visid.name);
vendorName[cp - visid.name] = '\0';
matches[i++] = vendorName;
matches[i++] = driverName;
}
}
}
}
#endif
#ifdef __sparc__
{
char *sbusDriver = sparcDriverName();
if (sbusDriver)
matches[i++] = xnfstrdup(sbusDriver);
}
#endif
/* Find the primary device, and get some information about it. */
iter = pci_slot_match_iterator_create(NULL);
while ((info = pci_device_next(iter)) != NULL) {
if (xf86IsPrimaryPci(info)) {
break;
}
}
pci_iterator_destroy(iter);
if (!info) {
ErrorF("Primary device is not PCI\n");
}
#ifdef __linux__
else {
matchDriverFromFiles(matches, info->vendor_id, info->device_id);
}
#endif /* __linux__ */
for (i = 0; (i < nmatches) && (matches[i]); i++) {
/* find end of matches list */
}
if ((info != NULL) && (i < nmatches)) {
i += videoPtrToDriverList(info, &(matches[i]), nmatches - i);
}
/* Fallback to platform default hardware */
if (i < (nmatches - 1)) {
#if defined(__i386__) || defined(__amd64__) || defined(__hurd__)
matches[i++] = xnfstrdup("vesa");
#elif defined(__sparc__) && !defined(sun)
matches[i++] = xnfstrdup("sunffb");
#endif
}
/* Fallback to platform default frame buffer driver */
if (i < (nmatches - 1)) {
#if !defined(__linux__) && defined(__sparc__)
matches[i++] = xnfstrdup("wsfb");
#else
matches[i++] = xnfstrdup("fbdev");
#endif
}
}
/* copy a screen section and enter the desired driver
* and insert it at i in the list of screens */
static Bool
copyScreen(confScreenPtr oscreen, GDevPtr odev, int i, char *driver)
{
GDevPtr cptr = NULL;
xf86ConfigLayout.screens[i].screen = xnfcalloc(1, sizeof(confScreenRec));
if(!xf86ConfigLayout.screens[i].screen)
return FALSE;
memcpy(xf86ConfigLayout.screens[i].screen, oscreen, sizeof(confScreenRec));
cptr = xcalloc(1, sizeof(GDevRec));
if (!cptr)
return FALSE;
memcpy(cptr, odev, sizeof(GDevRec));
cptr->identifier = Xprintf("Autoconfigured Video Device %s", driver);
cptr->driver = driver;
/* now associate the new driver entry with the new screen entry */
xf86ConfigLayout.screens[i].screen->device = cptr;
cptr->myScreenSection = xf86ConfigLayout.screens[i].screen;
return TRUE;
}
static int
hwloc_look_pci(struct hwloc_backend *backend)
{
struct hwloc_topology *topology = backend->topology;
struct hwloc_obj *first_obj = NULL, *last_obj = NULL;
#ifdef HWLOC_HAVE_LIBPCIACCESS
int ret;
struct pci_device_iterator *iter;
struct pci_device *pcidev;
#else /* HWLOC_HAVE_PCIUTILS */
struct pci_access *pciaccess;
struct pci_dev *pcidev;
#endif
if (!(hwloc_topology_get_flags(topology) & (HWLOC_TOPOLOGY_FLAG_IO_DEVICES|HWLOC_TOPOLOGY_FLAG_WHOLE_IO)))
return 0;
if (hwloc_get_next_pcidev(topology, NULL)) {
hwloc_debug("%s", "PCI objects already added, ignoring pci backend.\n");
return 0;
}
if (!hwloc_topology_is_thissystem(topology)) {
hwloc_debug("%s", "\nno PCI detection (not thissystem)\n");
return 0;
}
hwloc_debug("%s", "\nScanning PCI buses...\n");
/* initialize PCI scanning */
#ifdef HWLOC_HAVE_LIBPCIACCESS
ret = pci_system_init();
if (ret) {
hwloc_debug("%s", "Can not initialize libpciaccess\n");
return -1;
}
iter = pci_slot_match_iterator_create(NULL);
#else /* HWLOC_HAVE_PCIUTILS */
pciaccess = pci_alloc();
pciaccess->error = hwloc_pci_error;
pciaccess->warning = hwloc_pci_warning;
if (setjmp(err_buf)) {
pci_cleanup(pciaccess);
return -1;
}
pci_init(pciaccess);
pci_scan_bus(pciaccess);
#endif
/* iterate over devices */
#ifdef HWLOC_HAVE_LIBPCIACCESS
for (pcidev = pci_device_next(iter);
pcidev;
pcidev = pci_device_next(iter))
#else /* HWLOC_HAVE_PCIUTILS */
for (pcidev = pciaccess->devices;
pcidev;
pcidev = pcidev->next)
#endif
{
const char *vendorname, *devicename, *fullname;
unsigned char config_space_cache[CONFIG_SPACE_CACHESIZE];
struct hwloc_obj *obj;
unsigned os_index;
unsigned domain;
unsigned device_class;
unsigned short tmp16;
char name[128];
unsigned offset;
#ifdef HWLOC_HAVE_PCI_FIND_CAP
struct pci_cap *cap;
#endif
/* initialize the config space in case we fail to read it (missing permissions, etc). */
memset(config_space_cache, 0xff, CONFIG_SPACE_CACHESIZE);
#ifdef HWLOC_HAVE_LIBPCIACCESS
pci_device_probe(pcidev);
pci_device_cfg_read(pcidev, config_space_cache, 0, CONFIG_SPACE_CACHESIZE, NULL);
#else /* HWLOC_HAVE_PCIUTILS */
pci_read_block(pcidev, 0, config_space_cache, CONFIG_SPACE_CACHESIZE); /* doesn't even tell how much it actually reads */
#endif
/* try to read the domain */
#if (defined HWLOC_HAVE_LIBPCIACCESS) || (defined HWLOC_HAVE_PCIDEV_DOMAIN)
domain = pcidev->domain;
#else
domain = 0; /* default domain number */
#endif
/* try to read the device_class */
#ifdef HWLOC_HAVE_LIBPCIACCESS
device_class = pcidev->device_class >> 8;
#else /* HWLOC_HAVE_PCIUTILS */
#ifdef HWLOC_HAVE_PCIDEV_DEVICE_CLASS
device_class = pcidev->device_class;
#else
device_class = config_space_cache[PCI_CLASS_DEVICE] | (config_space_cache[PCI_CLASS_DEVICE+1] << 8);
#endif
#endif
/* might be useful for debugging (note that domain might be truncated) */
os_index = (domain << 20) + (pcidev->bus << 12) + (pcidev->dev << 4) + pcidev->func;
obj = hwloc_alloc_setup_object(HWLOC_OBJ_PCI_DEVICE, os_index);
obj->attr->pcidev.domain = domain;
obj->attr->pcidev.bus = pcidev->bus;
obj->attr->pcidev.dev = pcidev->dev;
obj->attr->pcidev.func = pcidev->func;
obj->attr->pcidev.vendor_id = pcidev->vendor_id;
obj->attr->pcidev.device_id = pcidev->device_id;
obj->attr->pcidev.class_id = device_class;
obj->attr->pcidev.revision = config_space_cache[PCI_REVISION_ID];
obj->attr->pcidev.linkspeed = 0; /* unknown */
#ifdef HWLOC_HAVE_PCI_FIND_CAP
cap = pci_find_cap(pcidev, PCI_CAP_ID_EXP, PCI_CAP_NORMAL);
offset = cap ? cap->addr : 0;
#else
offset = hwloc_pci_find_cap(config_space_cache, PCI_CAP_ID_EXP);
#endif /* HWLOC_HAVE_PCI_FIND_CAP */
if (0xffff == pcidev->vendor_id && 0xffff == pcidev->device_id) {
/* SR-IOV puts ffff:ffff in Virtual Function config space.
* The actual VF device ID is stored at a special (dynamic) location in the Physical Function config space.
* VF and PF have the same vendor ID.
*
* libpciaccess just returns ffff:ffff, needs to be fixed.
* linuxpci is OK because sysfs files are already fixed the kernel.
* pciutils is OK when it uses those Linux sysfs files.
*
* Reading these files is an easy way to work around the libpciaccess issue on Linux,
* but we have no way to know if this is caused by SR-IOV or not.
*
* TODO:
* If PF has CAP_ID_PCIX or CAP_ID_EXP (offset>0),
* look for extended capability PCI_EXT_CAP_ID_SRIOV (need extended config space (more than 256 bytes)),
* then read the VF device ID after it (PCI_IOV_DID bytes later).
* Needs access to extended config space (needs root on Linux).
* TODO:
* Add string info attributes in VF and PF objects?
*/
#ifdef HWLOC_LINUX_SYS
/* Workaround for Linux (the kernel returns the VF device/vendor IDs). */
char path[64];
char value[16];
FILE *file;
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/vendor",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
fread(value, sizeof(value), 1, file);
fclose(file);
obj->attr->pcidev.vendor_id = strtoul(value, NULL, 16);
}
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/device",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
fread(value, sizeof(value), 1, file);
fclose(file);
obj->attr->pcidev.device_id = strtoul(value, NULL, 16);
}
#endif
}
if (offset > 0 && offset + 20 /* size of PCI express block up to link status */ <= CONFIG_SPACE_CACHESIZE)
hwloc_pci_find_linkspeed(config_space_cache, offset, &obj->attr->pcidev.linkspeed);
hwloc_pci_prepare_bridge(obj, config_space_cache);
if (obj->type == HWLOC_OBJ_PCI_DEVICE) {
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_VENDOR_ID], sizeof(tmp16));
obj->attr->pcidev.subvendor_id = tmp16;
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_ID], sizeof(tmp16));
obj->attr->pcidev.subdevice_id = tmp16;
} else {
/* TODO:
* bridge must lookup PCI_CAP_ID_SSVID and then look at offset+PCI_SSVID_VENDOR/DEVICE_ID
* cardbus must look at PCI_CB_SUBSYSTEM_VENDOR_ID and PCI_CB_SUBSYSTEM_ID
*/
}
/* starting from pciutils 2.2, pci_lookup_name() takes a variable number
* of arguments, and supports the PCI_LOOKUP_NO_NUMBERS flag.
*/
/* get the vendor name */
#ifdef HWLOC_HAVE_LIBPCIACCESS
vendorname = pci_device_get_vendor_name(pcidev);
#else /* HWLOC_HAVE_PCIUTILS */
vendorname = pci_lookup_name(pciaccess, name, sizeof(name),
#if HAVE_DECL_PCI_LOOKUP_NO_NUMBERS
PCI_LOOKUP_VENDOR|PCI_LOOKUP_NO_NUMBERS,
pcidev->vendor_id
#else
PCI_LOOKUP_VENDOR,
pcidev->vendor_id, 0, 0, 0
#endif
);
#endif /* HWLOC_HAVE_PCIUTILS */
if (vendorname && *vendorname)
hwloc_obj_add_info(obj, "PCIVendor", vendorname);
/* get the device name */
#ifdef HWLOC_HAVE_LIBPCIACCESS
devicename = pci_device_get_device_name(pcidev);
#else /* HWLOC_HAVE_PCIUTILS */
devicename = pci_lookup_name(pciaccess, name, sizeof(name),
#if HAVE_DECL_PCI_LOOKUP_NO_NUMBERS
PCI_LOOKUP_DEVICE|PCI_LOOKUP_NO_NUMBERS,
pcidev->vendor_id, pcidev->device_id
#else
PCI_LOOKUP_DEVICE,
pcidev->vendor_id, pcidev->device_id, 0, 0
#endif
);
#endif /* HWLOC_HAVE_PCIUTILS */
if (devicename && *devicename)
hwloc_obj_add_info(obj, "PCIDevice", devicename);
/* generate or get the fullname */
#ifdef HWLOC_HAVE_LIBPCIACCESS
snprintf(name, sizeof(name), "%s%s%s",
vendorname ? vendorname : "",
vendorname && devicename ? " " : "",
devicename ? devicename : "");
fullname = name;
if (*name)
obj->name = strdup(name);
#else /* HWLOC_HAVE_PCIUTILS */
fullname = pci_lookup_name(pciaccess, name, sizeof(name),
#if HAVE_DECL_PCI_LOOKUP_NO_NUMBERS
PCI_LOOKUP_VENDOR|PCI_LOOKUP_DEVICE|PCI_LOOKUP_NO_NUMBERS,
pcidev->vendor_id, pcidev->device_id
#else
PCI_LOOKUP_VENDOR|PCI_LOOKUP_DEVICE,
pcidev->vendor_id, pcidev->device_id, 0, 0
#endif
);
if (fullname && *fullname)
obj->name = strdup(fullname);
#endif /* HWLOC_HAVE_PCIUTILS */
hwloc_debug(" %04x:%02x:%02x.%01x %04x %04x:%04x %s\n",
domain, pcidev->bus, pcidev->dev, pcidev->func,
device_class, pcidev->vendor_id, pcidev->device_id,
fullname && *fullname ? fullname : "??");
/* queue the object for now */
if (first_obj)
last_obj->next_sibling = obj;
else
first_obj = obj;
last_obj = obj;
}
/* finalize device scanning */
#ifdef HWLOC_HAVE_LIBPCIACCESS
pci_iterator_destroy(iter);
pci_system_cleanup();
#else /* HWLOC_HAVE_PCIUTILS */
pci_cleanup(pciaccess);
#endif
return hwloc_insert_pci_device_list(backend, first_obj);
}
static int
hwloc_look_pci(struct hwloc_backend *backend)
{
struct hwloc_topology *topology = backend->topology;
enum hwloc_type_filter_e pfilter, bfilter;
struct hwloc_obj *tree = NULL, *tmp;
int ret;
struct pci_device_iterator *iter;
struct pci_device *pcidev;
hwloc_topology_get_type_filter(topology, HWLOC_OBJ_PCI_DEVICE, &pfilter);
hwloc_topology_get_type_filter(topology, HWLOC_OBJ_BRIDGE, &bfilter);
if (bfilter == HWLOC_TYPE_FILTER_KEEP_NONE
&& pfilter == HWLOC_TYPE_FILTER_KEEP_NONE)
return 0;
/* don't do anything if another backend attached PCI already
* (they are attached to root until later in the core discovery)
*/
tmp = hwloc_get_root_obj(topology)->io_first_child;
while (tmp) {
if (tmp->type == HWLOC_OBJ_PCI_DEVICE
|| (tmp->type == HWLOC_OBJ_BRIDGE && tmp->attr->bridge.downstream_type == HWLOC_OBJ_BRIDGE_PCI)) {
hwloc_debug("%s", "PCI objects already added, ignoring linuxpci backend.\n");
return 0;
}
tmp = tmp->next_sibling;
}
hwloc_debug("%s", "\nScanning PCI buses...\n");
/* initialize PCI scanning */
ret = pci_system_init();
if (ret) {
hwloc_debug("%s", "Can not initialize libpciaccess\n");
return -1;
}
iter = pci_slot_match_iterator_create(NULL);
/* iterate over devices */
for (pcidev = pci_device_next(iter);
pcidev;
pcidev = pci_device_next(iter))
{
const char *vendorname, *devicename;
unsigned char config_space_cache[CONFIG_SPACE_CACHESIZE];
hwloc_obj_type_t type;
struct hwloc_obj *obj;
unsigned domain;
unsigned device_class;
unsigned short tmp16;
unsigned offset;
/* initialize the config space in case we fail to read it (missing permissions, etc). */
memset(config_space_cache, 0xff, CONFIG_SPACE_CACHESIZE);
pci_device_probe(pcidev);
pci_device_cfg_read(pcidev, config_space_cache, 0, CONFIG_SPACE_CACHESIZE, NULL);
/* try to read the domain */
domain = pcidev->domain;
/* try to read the device_class */
device_class = pcidev->device_class >> 8;
/* bridge or pci dev? */
type = hwloc_pcidisc_check_bridge_type(device_class, config_space_cache);
/* filtered? */
if (type == HWLOC_OBJ_PCI_DEVICE) {
enum hwloc_type_filter_e filter;
hwloc_topology_get_type_filter(topology, HWLOC_OBJ_PCI_DEVICE, &filter);
if (filter == HWLOC_TYPE_FILTER_KEEP_NONE)
continue;
if (filter == HWLOC_TYPE_FILTER_KEEP_IMPORTANT
&& !hwloc_filter_check_pcidev_subtype_important(device_class))
continue;
} else if (type == HWLOC_OBJ_BRIDGE) {
enum hwloc_type_filter_e filter;
hwloc_topology_get_type_filter(topology, HWLOC_OBJ_BRIDGE, &filter);
if (filter == HWLOC_TYPE_FILTER_KEEP_NONE)
continue;
/* HWLOC_TYPE_FILTER_KEEP_IMPORTANT filtered later in the core */
}
/* fixup SR-IOV buggy VF device/vendor IDs */
if (0xffff == pcidev->vendor_id && 0xffff == pcidev->device_id) {
/* SR-IOV puts ffff:ffff in Virtual Function config space.
* The actual VF device ID is stored at a special (dynamic) location in the Physical Function config space.
* VF and PF have the same vendor ID.
*
* libpciaccess just returns ffff:ffff, needs to be fixed.
* linuxpci is OK because sysfs files are already fixed in the kernel.
* (pciutils is OK when it uses those Linux sysfs files.)
*
* Reading these files is an easy way to work around the libpciaccess issue on Linux,
* but we have no way to know if this is caused by SR-IOV or not.
*
* TODO:
* If PF has CAP_ID_PCIX or CAP_ID_EXP (offset>0),
* look for extended capability PCI_EXT_CAP_ID_SRIOV (need extended config space (more than 256 bytes)),
* then read the VF device ID after it (PCI_IOV_DID bytes later).
* Needs access to extended config space (needs root on Linux).
* TODO:
* Add string info attributes in VF and PF objects?
*/
#ifdef HWLOC_LINUX_SYS
/* Workaround for Linux (the kernel returns the VF device/vendor IDs). */
char path[64];
char value[16];
FILE *file;
size_t read;
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/vendor",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
read = fread(value, 1, sizeof(value), file);
fclose(file);
if (read)
/* fixup the pciaccess struct so that pci_device_get_vendor_name() is correct later. */
pcidev->vendor_id = strtoul(value, NULL, 16);
}
snprintf(path, sizeof(path), "/sys/bus/pci/devices/%04x:%02x:%02x.%01x/device",
domain, pcidev->bus, pcidev->dev, pcidev->func);
file = fopen(path, "r");
if (file) {
read = fread(value, 1, sizeof(value), file);
fclose(file);
if (read)
/* fixup the pciaccess struct so that pci_device_get_device_name() is correct later. */
pcidev->device_id = strtoul(value, NULL, 16);
}
#endif
}
obj = hwloc_alloc_setup_object(topology, type, HWLOC_UNKNOWN_INDEX);
obj->attr->pcidev.domain = domain;
obj->attr->pcidev.bus = pcidev->bus;
obj->attr->pcidev.dev = pcidev->dev;
obj->attr->pcidev.func = pcidev->func;
obj->attr->pcidev.vendor_id = pcidev->vendor_id;
obj->attr->pcidev.device_id = pcidev->device_id;
obj->attr->pcidev.class_id = device_class;
obj->attr->pcidev.revision = config_space_cache[PCI_REVISION_ID];
obj->attr->pcidev.linkspeed = 0; /* unknown */
offset = hwloc_pcidisc_find_cap(config_space_cache, PCI_CAP_ID_EXP);
if (offset > 0 && offset + 20 /* size of PCI express block up to link status */ <= CONFIG_SPACE_CACHESIZE)
hwloc_pcidisc_find_linkspeed(config_space_cache, offset, &obj->attr->pcidev.linkspeed);
if (type == HWLOC_OBJ_BRIDGE) {
if (hwloc_pcidisc_setup_bridge_attr(obj, config_space_cache) < 0)
continue;
}
if (obj->type == HWLOC_OBJ_PCI_DEVICE) {
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_VENDOR_ID], sizeof(tmp16));
obj->attr->pcidev.subvendor_id = tmp16;
memcpy(&tmp16, &config_space_cache[PCI_SUBSYSTEM_ID], sizeof(tmp16));
obj->attr->pcidev.subdevice_id = tmp16;
} else {
/* TODO:
* bridge must lookup PCI_CAP_ID_SSVID and then look at offset+PCI_SSVID_VENDOR/DEVICE_ID
* cardbus must look at PCI_CB_SUBSYSTEM_VENDOR_ID and PCI_CB_SUBSYSTEM_ID
*/
}
/* get the vendor name */
vendorname = pci_device_get_vendor_name(pcidev);
if (vendorname && *vendorname)
hwloc_obj_add_info(obj, "PCIVendor", vendorname);
/* get the device name */
devicename = pci_device_get_device_name(pcidev);
if (devicename && *devicename)
hwloc_obj_add_info(obj, "PCIDevice", devicename);
hwloc_debug(" %04x:%02x:%02x.%01x %04x %04x:%04x %s %s\n",
domain, pcidev->bus, pcidev->dev, pcidev->func,
device_class, pcidev->vendor_id, pcidev->device_id,
vendorname && *vendorname ? vendorname : "??",
devicename && *devicename ? devicename : "??");
hwloc_pcidisc_tree_insert_by_busid(&tree, obj);
}
/* finalize device scanning */
pci_iterator_destroy(iter);
pci_system_cleanup();
hwloc_pcidisc_tree_attach(topology, tree);
return 0;
}
