netdev - RE: [PATCH v5 net-next 0/4] Add ethtool interface for RClocks

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Message-ID: <DM6PR11MB465758ECC87273A56CA2826F9B789@DM6PR11MB4657.namprd11.prod.outlook.com>
Date:   Fri, 17 Dec 2021 00:01:43 +0000
From:   "Kubalewski, Arkadiusz" <arkadiusz.kubalewski@...el.com>
To:     Vadim Fedorenko <vfedorenko@...ek.ru>,
        "Machnikowski, Maciej" <maciej.machnikowski@...el.com>,
        Jakub Kicinski <kuba@...nel.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>,
        "Byagowi, Ahmad" <abyagowi@...com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "idosch@...sch.org" <idosch@...sch.org>,
        "mkubecek@...e.cz" <mkubecek@...e.cz>,
        "saeed@...nel.org" <saeed@...nel.org>,
        "michael.chan@...adcom.com" <michael.chan@...adcom.com>,
        "petrm@...dia.com" <petrm@...dia.com>
Subject: RE: [PATCH v5 net-next 0/4] Add ethtool interface for RClocks

>On 15.12.2021 12:14, Kubalewski, Arkadiusz wrote:
>>> -----Original Message-----
>>> From: Machnikowski, Maciej <maciej.machnikowski@...el.com>
>>> Sent: poniedziałek, 13 grudnia 2021 09:54
>>> To: Jakub Kicinski <kuba@...nel.org>
>>> Cc: netdev@...r.kernel.org; intel-wired-lan@...ts.osuosl.org; Kubalewski, Arkadiusz <arkadiusz.kubalewski@...el.com>; richardcochran@...il.com; Byagowi, Ahmad <abyagowi@...com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; davem@...emloft.net; linux-kselftest@...r.kernel.org; idosch@...sch.org; mkubecek@...e.cz; saeed@...nel.org; michael.chan@...adcom.com; petrm@...dia.com; Vadim Fedorenko <vfedorenko@...ek.ru>
>>> Subject: RE: [PATCH v5 net-next 0/4] Add ethtool interface for RClocks
>>>
>>>> -----Original Message-----
>>>> From: Jakub Kicinski <kuba@...nel.org>
>>>> Sent: Friday, December 10, 2021 5:17 PM
>>>> To: Machnikowski, Maciej <maciej.machnikowski@...el.com>
>>>> Cc: netdev@...r.kernel.org; intel-wired-lan@...ts.osuosl.org;
>>>> Kubalewski, Arkadiusz <arkadiusz.kubalewski@...el.com>;
>>>> richardcochran@...il.com; Byagowi, Ahmad <abyagowi@...com>; Nguyen,
>>>> Anthony L <anthony.l.nguyen@...el.com>; davem@...emloft.net; linux-
>>>> kselftest@...r.kernel.org; idosch@...sch.org; mkubecek@...e.cz;
>>>> saeed@...nel.org; michael.chan@...adcom.com; petrm@...dia.com; Vadim
>>>> Fedorenko <vfedorenko@...ek.ru>
>>>> Subject: Re: [PATCH v5 net-next 0/4] Add ethtool interface for RClocks
>>>>
>>>> On Fri, 10 Dec 2021 14:45:46 +0100 Maciej Machnikowski wrote:
>>>>> Synchronous Ethernet networks use a physical layer clock to
>>>>> syntonize the frequency across different network elements.
>>>>>
>>>>> Basic SyncE node defined in the ITU-T G.8264 consist of an Ethernet
>>>>> Equipment Clock (EEC) and have the ability to synchronize to
>>>>> reference frequency sources.
>>>>>
>>>>> This patch series is a prerequisite for EEC object and adds ability
>>>>> to enable recovered clocks in the physical layer of the netdev object.
>>>>> Recovered clocks can be used as one of the reference signal by the EEC.
>>>>>
>>>>> Further work is required to add the DPLL subsystem, link it to the
>>>>> netdev object and create API to read the EEC DPLL state.
>>>>
>>>> You missed CCing Vadim. I guess Ccing the right people may be right up
>>>> there with naming things as the hardest things in SW development..
>>>>
>>>> Anyway, Vadim - do you have an ETA on the first chunk of the PLL work?
>>>
>>> Sounds about right :) thanks for adding Vadim!
>>>
>> 
>> Good day Vadim,
>> 
>> Can we help on the new PLL interfaces?
>> I can start some works related to that, although would need a guidance
>> from the expert.
>> Where to place it?
>> What in-kernel interfaces to use?
>> Any other high level tips that could be useful?
>> Or if you already started some work, could you please share some
>> information?
>> 
>Hi!
>
>I'm going to publish RFC till the end of the week and we will be able to
>continue discussion via this mailing list. I think that netlink is a good
>option for in-kernel interface and is easy to implement.
>

Oh, that sounds great!
Thank you!