RE: [PATCH v3 net-next 3/3] net: ena: Add PHC documentation

["Arinzon, David" <darinzon@amazon.com>]

> > +=================
> ======================================================
> > +**phc_cnt**         Number of successful retrieved timestamps (below
> expire timeout).
> > +**phc_exp**         Number of expired retrieved timestamps (above
> expire timeout).
> > +**phc_skp**         Number of skipped get time attempts (during block
> period).
> > +**phc_err**         Number of failed get time attempts (entering into block
> state).
> > +=================
> ======================================================
> 
> I seem to recall we had an unpleasant conversation about using standard
> stats recently. Please tell me where you looked to check if Linux has standard
> stats for packet timestamping. We need to add the right info there.
> --
> pw-bot: cr

Hi Jakub,

Just wanted to clarify that this feature and the associated documentation are specifically intended for reading a HW timestamp,
not for TX/RX packet timestamping.
We reviewed similar drivers that support HW timestamping via `gettime64` and `gettimex64` APIs,
and we couldn't identify any that capture or report statistics related to reading a HW timestamp.
Let us know if further details would be helpful.