acpi_pcidev_get_tag
pci_chipset_tag_t acpi_pcidev_get_tag(uint16_t, uint16_t,
pc = acpi_pcidev_get_tag(PciId->Segment, PciId->Bus, PciId->Device, PciId->Function);
pc = acpi_pcidev_get_tag(PciId->Segment, PciId->Bus, PciId->Device, PciId->Function);