Question: Proper place for port details?

Some network device drivers are capable of collecting further
information on the link partner, e.g. reporting details on the port
in the adjacent switch. Is there a good place to make these
available outside of the kernel? ethtool gives a bit of information
like the link partner's speed or duplex mode. But is adding further
information about the link partner to ethtool desired, or is there a
better place somewhere else?

Ciao,
Stefan