netdev - Re: [PATCH net-next 1/3] net: ethtool: add support for forward error correction modes

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Message-ID: <20170627032239.05cdc462@cakuba.netronome.com>
Date:   Tue, 27 Jun 2017 03:22:39 -0700
From:   Jakub Kicinski <kubakici@...pl>
To:     Roopa Prabhu <roopa@...ulusnetworks.com>
Cc:     davem@...emloft.net, linville@...driver.com,
        netdev@...r.kernel.org, vidya.chowdary@...il.com,
        dustin@...ulusnetworks.com, olson@...ulusnetworks.com,
        leedom@...lsio.com, manojmalviya@...lsio.com, santosh@...lsio.com,
        yuval.mintz@...gic.com, odedw@...lanox.com, ariela@...lanox.com,
        galp@...lanox.com, jeffrey.t.kirsher@...el.com
Subject: Re: [PATCH net-next 1/3] net: ethtool: add support for forward
 error correction modes

On Sat, 24 Jun 2017 12:19:43 -0700, Roopa Prabhu wrote:
> Encoding: Types of encoding
> Off    :  Turning off any encoding
> RS     :  enforcing RS-FEC encoding on supported speeds
> BaseR  :  enforcing Base R encoding on supported speeds
> Auto   :  IEEE defaults for the speed/medium combination

Just to be sure - does auto mean autonegotiate as defined by IEEE or
some presets?  IIUC there is a notion of different length cables
defaulting to different strength of FEC in 25GE?

Thank you for doing this work!