netdev - Re: [RFC PATCH v2] net: ethtool: add support for forward error correction modes

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Message-ID: <MWHPR12MB1600C9C8528A929DD0404943C85B0@MWHPR12MB1600.namprd12.prod.outlook.com>
Date:   Wed, 15 Feb 2017 17:38:07 +0000
From:   Casey Leedom <leedom@...lsio.com>
To:     Vidya Sagar Ravipati <vidya@...ulusnetworks.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linville@...driver.com" <linville@...driver.com>,
        "jeffrey.t.kirsher@...el.com" <jeffrey.t.kirsher@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>
CC:     "roopa@...ulusnetworks.com" <roopa@...ulusnetworks.com>,
        "dustin@...ulusnetworks.com" <dustin@...ulusnetworks.com>,
        "odedw@...lanox.com" <odedw@...lanox.com>,
        "ariela@...lanox.com" <ariela@...lanox.com>,
        "Yuval.Mintz@...gic.com" <Yuval.Mintz@...gic.com>,
        "galp@...lanox.com" <galp@...lanox.com>,
        "vidya.chowdary@...il.com" <vidya.chowdary@...il.com>
Subject: Re: [RFC PATCH  v2] net: ethtool: add support for forward error
 correction modes

  Vidya and I have been in communication on how to support Forward Error Correction Management on Links.  My own thoughts are that we should consider using the new Get/Set Link Ksettiongs API because FEC is a low-level Link parameter which is either negotiated at the same time as Link Speed if Auto-Negotiation is in use, or must be set identically on both Link Peers is AN is not in use.  I'm not convinced that FEC Management should use a separate ethtool/Kernel Driver API ala Pause Frame settings.

  I'm hoping to meet with Vidya and his collaborators at Cumulus Networks in the very near term to hash these issues out.

Casey