netdev - Re: [net-next V2 11/14] ethtool: Add support for low latency RS FEC

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Date:   Sun, 26 Jan 2020 09:13:10 +0000
From:   Aya Levin <ayal@...lanox.com>
To:     Andrew Lunn <andrew@...n.ch>, Jakub Kicinski <kuba@...nel.org>
CC:     Saeed Mahameed <saeedm@...lanox.com>,
        "David S. Miller" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Eran Ben Elisha <eranbe@...lanox.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Michal Kubecek <mkubecek@...e.cz>
Subject: Re: [net-next V2 11/14] ethtool: Add support for low latency RS FEC



On 1/25/2020 11:05 PM, Andrew Lunn wrote:
> On Sat, Jan 25, 2020 at 11:40:37AM -0800, Jakub Kicinski wrote:
>> On Sat, 25 Jan 2020 05:11:52 +0000, Saeed Mahameed wrote:
>>> From: Aya Levin <ayal@...lanox.com>
>>>
>>> Add support for low latency Reed Solomon FEC as LLRS.
>>>
>>> Signed-off-by: Aya Levin <ayal@...lanox.com>
>>> Reviewed-by: Eran Ben Elisha <eranbe@...lanox.com>
>>> Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
>>
>> This is kind of buried in the midst of the driver patches.
>> It'd preferably be a small series of its own.
>> Let's at least try to CC PHY folk now.
> 
> Thanks Jakuv
> 
>> Is this from some standard?
> 
> A reference would be good.
https://25gethernet.org/
25G consortium
> 
> I assume the existing ETHTOOL_LINK_MODE_FEC_RS_BIT is for Clause 91.
It is for both Clause91 and for Cluase 134 for 50GBASE-R PHYs
> What clause does this LLRS refer to?
The LL-FEC  is defined in the document titled "Low Latency Reed Solomon
Forward Error Correction", in https://25gethernet.org/
> 
> Thanks
> 	Andrew
>