netdev - RE: [RFC v5 net-next 2/5] rtnetlink: Add new RTM_GETEECSTATE message to get SyncE status

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Message-ID: <PH0PR11MB495191854BF5470E9BF223F5EA859@PH0PR11MB4951.namprd11.prod.outlook.com>
Date:   Wed, 27 Oct 2021 13:16:22 +0000
From:   "Machnikowski, Maciej" <maciej.machnikowski@...el.com>
To:     Ido Schimmel <idosch@...sch.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "richardcochran@...il.com" <richardcochran@...il.com>,
        "abyagowi@...com" <abyagowi@...com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "mkubecek@...e.cz" <mkubecek@...e.cz>,
        "saeed@...nel.org" <saeed@...nel.org>,
        "michael.chan@...adcom.com" <michael.chan@...adcom.com>
Subject: RE: [RFC v5 net-next 2/5] rtnetlink: Add new RTM_GETEECSTATE message
 to get SyncE status



> -----Original Message-----
> From: Ido Schimmel <idosch@...sch.org>
> Sent: Wednesday, October 27, 2021 9:10 AM
> To: Machnikowski, Maciej <maciej.machnikowski@...el.com>
> Subject: Re: [RFC v5 net-next 2/5] rtnetlink: Add new RTM_GETEECSTATE
> message to get SyncE status
> 
> On Tue, Oct 26, 2021 at 07:31:43PM +0200, Maciej Machnikowski wrote:
> > +/* SyncE section */
> > +
> > +enum if_eec_state {
> > +	IF_EEC_STATE_INVALID = 0,
> > +	IF_EEC_STATE_FREERUN,
> > +	IF_EEC_STATE_LOCKED,
> > +	IF_EEC_STATE_LOCKED_HO_ACQ,
> 
> Is this referring to "Locked mode, acquiring holdover: This is a
> temporary mode, when coming from free-run, to acquire holdover
> memory."
> ?

Locked HO ACQ means locked and holdover acquired. It's the state that
allows transferring to the holdover state. Locked means that we locked
our frequency and started acquiring the holdover memory.
 
> It seems ice isn't using it, so maybe drop it? Can be added later in
> case we have a driver that can report it

I'll update the driver in the next revision
 
> There is also "Locked mode, holdover acquired: This is a steady state
> mode, entered when holdover memory is acquired." But I assume that's
> "IF_EEC_STATE_LOCKED"
> 
> > +	IF_EEC_STATE_HOLDOVER,
> > +};