netdev - Re: [PATCH net-next 0/5][pull request] add v2 FW logging for ice driver

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Message-ID: <20230214180712.53fc8ba2@kernel.org>
Date:   Tue, 14 Feb 2023 18:07:12 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Jacob Keller <jacob.e.keller@...el.com>
Cc:     Paul M Stillwell Jr <paul.m.stillwell.jr@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        <davem@...emloft.net>, <pabeni@...hat.com>, <edumazet@...gle.com>,
        <netdev@...r.kernel.org>, <jiri@...dia.com>, <idosch@...sch.org>
Subject: Re: [PATCH net-next 0/5][pull request] add v2 FW logging for ice
 driver

On Tue, 14 Feb 2023 17:33:25 -0800 Jacob Keller wrote:
> > Yes, I know, all NICs are generic IO devices now. While the only
> > example of what can go wrong we heard so far is a link flap...
> > 
> > Reimplementing a similar API in devlink with a backward compat
> > is definitely an option.
> 
> Sure. Well the interface is more of a way for firmware team to get
> debugging information out of the firmware. Its sort of like a "print"
> debugging, where information about the state of firmware during
> different activities can be recorded.
> 
> The idea is that when a problem is detected by a user, they can enable
> firmware logging to capture this data and then that can aid us in
> determining what really went wrong.
> 
> It isn't a "we detected a problem" interface. It's a "here's a bunch of
> debugging logging you asked for!" interface.

Yes, none of this sounds very usable in production. So maybe just put
the basic interface in debugfs and keep the per-module etc. whetevers
in the out of tree driver? That seems like a level of granularity
useful for development.