static int
sysfs_detect(struct pci_access *a)
{
if (access(sysfs_name(a), R_OK))
{
a->debug("...cannot open %s", sysfs_name(a));
return 0;
}
a->debug("...using %s", sysfs_name(a));
return 1;
}
static void
sysfs_obj_name(struct pci_dev *d, char *object, char *buf)
{
int n = snprintf(buf, OBJNAMELEN, "%s/devices/%04x:%02x:%02x.%d/%s",
sysfs_name(d->access), d->domain, d->bus, d->dev, d->func, object);
if (n < 0 || n >= OBJNAMELEN)
d->access->error("File name too long");
}
static void sysfs_scan(struct pci_access *a)
{
char dirname[1024];
DIR *dir;
struct dirent *entry;
int n;
n = snprintf(dirname, sizeof(dirname), "%s/devices", sysfs_name(a));
if (n < 0 || n >= (int) sizeof(dirname))
a->error("Directory name too long");
dir = opendir(dirname);
if (!dir)
a->error("Cannot open %s", dirname);
while ((entry = readdir(dir)))
{
struct pci_dev *d;
unsigned int dom, bus, dev, func;
/* ".", ".." or a special non-device perhaps */
if (entry->d_name[0] == '.')
continue;
d = pci_alloc_dev(a);
if (sscanf(entry->d_name, "%x:%x:%x.%d", &dom, &bus, &dev, &func) < 4)
a->error("sysfs_scan: Couldn't parse entry name %s", entry->d_name);
d->domain = dom;
d->bus = bus;
d->dev = dev;
d->func = func;
if (!a->buscentric)
{
sysfs_get_resources(d);
d->irq = sysfs_get_value(d, "irq");
d->known_fields = PCI_FILL_IRQ | PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES;
#if 0
/*
* We prefer reading these from the config registers, it's faster.
* However, it would be possible and maybe even useful to hack the kernel
* to believe that some device has a different ID. If you do it, just
* enable this piece of code. --mj
*/
d->vendor_id = sysfs_get_value(d, "vendor");
d->device_id = sysfs_get_value(d, "device");
d->known_fields |= PCI_FILL_IDENT;
#endif
}
pci_link_dev(a, d);
}
closedir(dir);
}
static void sysfs_scan(struct pci_access *a)
{
char dirname[1024];
DIR *dir;
struct dirent *entry;
int n;
n = snprintf(dirname, sizeof(dirname), "%s/devices", sysfs_name(a));
if (n < 0 || n >= (int) sizeof(dirname))
a->error("Directory name too long");
dir = opendir(dirname);
if (!dir)
a->error("Cannot open %s", dirname);
while ((entry = readdir(dir)))
{
struct pci_dev *d;
unsigned int dom, bus, dev, func;
/* ".", ".." or a special non-device perhaps */
if (entry->d_name[0] == '.')
continue;
d = pci_alloc_dev(a);
if (sscanf(entry->d_name, "%x:%x:%x.%d", &dom, &bus, &dev, &func) < 4)
a->error("sysfs_scan: Couldn't parse entry name %s", entry->d_name);
d->domain = dom;
d->bus = bus;
d->dev = dev;
d->func = func;
if (!a->buscentric)
{
sysfs_get_resources(d);
d->irq = sysfs_get_value(d, "irq");
/*
* We could read these faster from the config registers, but we want to give
* the kernel a chance to fix up ID's and especially classes of broken devices.
*/
d->vendor_id = sysfs_get_value(d, "vendor");
d->device_id = sysfs_get_value(d, "device");
d->device_class = sysfs_get_value(d, "class") >> 8;
d->known_fields = PCI_FILL_IDENT | PCI_FILL_CLASS | PCI_FILL_IRQ | PCI_FILL_BASES | PCI_FILL_ROM_BASE | PCI_FILL_SIZES;
}
pci_link_dev(a, d);
}
