netdev - Re: [PATCH net-next 2/3] nfp: add support for link auto negotiation

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Message-ID: <20220927011353.GA20766@nj-rack01-04.nji.corigine.com>
Date:   Tue, 27 Sep 2022 09:13:53 +0800
From:   Yinjun Zhang <yinjun.zhang@...igine.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Simon Horman <simon.horman@...igine.com>,
        David Miller <davem@...emloft.net>,
        Paolo Abeni <pabeni@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        oss-drivers <oss-drivers@...igine.com>,
        Fei Qin <fei.qin@...igine.com>
Subject: Re: [PATCH net-next 2/3] nfp: add support for link auto negotiation

On Mon, Sep 26, 2022 at 09:25:47AM -0700, Jakub Kicinski wrote:
> On Sat, 24 Sep 2022 10:45:30 +0800 Yinjun Zhang wrote:
> > On Fri, Sep 23, 2022 at 05:24:10PM -0700, Jakub Kicinski wrote:
> > > > Because the value of sp_indiff depends on the loaded application
> > > > firmware, please ref to previous commit:
> > > > 2b88354d37ca ("nfp: check if application firmware is indifferent to port speed")  
> > > 
> > > AFAICT you check if it's flower, you can check that in the main code,
> > > the app id is just a symbol, right?  
> > 
> > Not only check if it's flower, but also check if it's sp_indiff when
> > it's not flower by parsing the tlv caps.
> 
> Seems bogus. The speed independence is a property of the whole FW image,
> you record it in the pf structure.

It's indeed a per-fw property, but we don't have existing way to expose
per-fw capabilities to driver currently, so use per-vnic tlv caps here.
Maybe define a new fw symbol is a choice, but my concern is it's not
visible to netvf driver.
Any suggestion is welcomed.