netdev - Re: [patch net-next 00/11] mlxsw: Implement dev info and dev flash for line cards

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Message-ID: <Yrqogz8U+BxtFWiu@nanopsycho>
Date:   Tue, 28 Jun 2022 09:06:43 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Shannon Nelson <snelson@...sando.io>,
        Ido Schimmel <idosch@...dia.com>, netdev@...r.kernel.org,
        davem@...emloft.net, petrm@...dia.com, pabeni@...hat.com,
        edumazet@...gle.com, mlxsw@...dia.com
Subject: Re: [patch net-next 00/11] mlxsw: Implement dev info and dev flash
 for line cards

Mon, Jun 27, 2022 at 08:52:09PM CEST, kuba@...nel.org wrote:
>On Mon, 27 Jun 2022 11:38:50 -0700 Shannon Nelson wrote:
>> >> Can you encode the base device's PCI info into the auxiliary device's id  
>> > 
>> > Would look odd to he PCI BDF in auxdev addsess, wouldn't it?  
>> 
>> Sure, it looks a little odd to see something like mycore.app.1281, but 
>> it does afford the auxiliary driver, and any other observer, a way to 
>> figure out which device it is representing.  This also works nicely when 
>> trying to associate an auxiliary driver instance for a VF with the 
>> matching VF PCI driver instance.
>
>I'd personally not mind divorcing devlink from bus devices a little
>more. On one hand we have cases like this where there's naturally no

How exactly do you envision to do this? There is a good reason to have
the handle based on bus/name, as it is constant and predictable.


>bus device, on the other we have multi-link PCI devices which want to
>straddle NUMA nodes but otherwise are just a logical unit.