Messages in this thread | | | Date | Mon, 29 Aug 2022 14:30:29 +0200 | From | Andrew Lunn <> | Subject | Re: [PATCH net-next] net: phy: micrel: Adding SQI support for lan8814 phy |
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> Yes Channel 0 is correct. > > > Again this is the first time I hear about SQI but it puzzles me that > > it only evaluate one pair in this case. So as a user who reads this > > SQI might be misleaded. > > > > Yeah, It needs uAPI extension.
I think the current uAPI actually allows it, sort of. You can have multiple instances of a netlink property in a netlink message. So simply add 2 or 4 ETHTOOL_A_LINKSTATE_SQI properties. The existing user space tools will likely just print the first value it finds. Newer versions can walk the messages and print them all.
The alternative is to add a new nest, like i did for cable test results:
+-+-------------------------------------------+--------+---------------------+ | | ``ETHTOOL_A_CABLE_NEST_RESULT`` | nested | cable test result | +-+-+-----------------------------------------+--------+---------------------+ | | | ``ETHTOOL_A_CABLE_RESULTS_PAIR`` | u8 | pair number | +-+-+-----------------------------------------+--------+---------------------+ | | | ``ETHTOOL_A_CABLE_RESULTS_CODE`` | u8 | result code | +-+-+-----------------------------------------+--------+---------------------+
You can then explicitly indicate which cable pair the SQI value corresponds to. In order to keep backwards compatibility, you would still need to provide ETHTOOL_A_LINKSTATE_SQI, and then additionally have these nests.
Andrew
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