netdev - Re: [PATCH net-next 00/11] mlxsw: extend line card model by devices and info

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Date:   Wed, 27 Apr 2022 09:37:47 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Jakub Kicinski <kuba@...nel.org>, Ido Schimmel <idosch@...sch.org>,
        Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org,
        davem@...emloft.net, pabeni@...hat.com, jiri@...dia.com,
        petrm@...dia.com, dsahern@...il.com, mlxsw@...dia.com
Subject: Re: [PATCH net-next 00/11] mlxsw: extend line card model by devices
 and info

Tue, Apr 26, 2022 at 05:24:41PM CEST, andrew@...n.ch wrote:
>> Does not make sense to me at all. Line cards are detachable PHY sets in
>> essence, very basic functionality. They does not have buffers, health
>> and params, I don't think so. 
>
>Ido recently added support to ethtool to upgrade the flash in SFPs.
>They are far from simple devices. Some of the GPON ones have linux
>running in them, that you can log in to.
>
>The real question is, can you do everything you need to do via
>existing uAPIs like ethtool and hwmon.

No, it does not fit. Ethtool works with netdevices which are
instantiated for separate port. The disconnection between what we can do
with netdev as a handle and how the devices are modeled was the reason
for devlink introduction in the past.

>
>	Andrew