unsigned int pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn, unsigned int max);
unsigned int pciexp_scan_bridge(device_t dev, unsigned int max);
unsigned int pciexp_scan_bus(struct bus *bus, unsigned int min_devfn,
unsigned int max_devfn, unsigned int max);
unsigned int pciexp_scan_bridge(device_t dev, unsigned int max);