How does lspci find out physical slot number of a PCI device?

What are PCIe Slots in PC? pcie slot function For years, PCI has been a versatile, functional way to connect sound, video and network cards to a motherboard In addition, a x16 PCIe slot pcie slot sizes Workstation class systems offer a x16 slot for graphics and a x4 slot for higher-end PCI Express peripheral devices, while the server class

pcie x 16 slot PCIe expansion slot definitions Slot, Type, Form factor, Connector link width, Negotiable link width, Supported expansion board 1 PCIe FlexibleLOM