Re: [PATCH net-next 2/2] ice: add support for reading SyncE DPLL state

On Fri, Sep 03, 2021 at 05:14:36PM +0200, Maciej Machnikowski wrote:

Implement SyncE DPLL monitoring for E810-T devices.
Poll loop will periodically check the state of the DPLL and cache it
in the pf structure. State changes will be logged in the system log.

Cached state can be read using the RTM_GETEECSTATE rtnetlink
message.

This seems sub-optimal. My understanding is that this information is of
importance to the user space process that takes care of the ESMC
protocol. It would probably want to receive a notification when the
state of the DPLL/EEC changes as opposed to polling the kernel or poking
into its log.

So I think that whatever netlink-based interface we agree on to
represent the EEC (devlink or something else), should have the ability
to send a notification when the state changes.