This might be a long shot, but if there is anyone out there with a system that has one of these in it, running a very recent Linux kernel:

https://www.broadcom.com/products/ethernet-connectivity/network-adapters/100gb-nic-ocp/p2100g

I'm looking for a copy of the output from 'dmesg' on boot and output from "lspci -v" to see exactly how it shows up on the PCI-E bus.