netdev - Re: [PATCH iwl-net 04/10] idpf: negotiate PTP capabilies and get PTP clock

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Message-ID: <67368712b301b_350fb529488@willemb.c.googlers.com.notmuch>
Date: Thu, 14 Nov 2024 18:26:10 -0500
From: Willem de Bruijn <willemdebruijn.kernel@...il.com>
To: Milena Olech <milena.olech@...el.com>, 
 intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org, 
 anthony.l.nguyen@...el.com, 
 przemyslaw.kitszel@...el.com, 
 Milena Olech <milena.olech@...el.com>, 
 Alexander Lobakin <aleksander.lobakin@...el.com>
Subject: Re: [PATCH iwl-net 04/10] idpf: negotiate PTP capabilies and get PTP
 clock

Milena Olech wrote:
> PTP capabilities are negotiated using virtchnl command. Add get
> capabilities function, direct access to read the PTP clock time and
> direct access to read the cross timestamp - system time and PTP clock
> time. Set initial PTP capabilities exposed to the stack.
> 
> Reviewed-by: Alexander Lobakin <aleksander.lobakin@...el.com>
> Signed-off-by: Milena Olech <milena.olech@...el.com>

Tested-by: Willem de Bruijn <willemb@...gle.com>

- Brought up a device
- Verified the virtchannel capability negotiation
- Verified /dev/ptp0 becomes availabe
- Read the device clock using clock_gettime(FD_TO_CLOCKID(fd), &ts)
- Verified clock is full 64b (i.e., not a 32b truncated that rolls over)