Comment by loeg

https://github.com/antmicro/wireshark-pcie-dissector

or https://github.com/sora/wireshark-pcie/blob/master/plugins/p...

(The PCIe wire format consists of TLPs and DLLPs. Context: https://xillybus.com/tutorials/pci-express-tlp-pcie-primer-t... )