linux-kernel - Re: [net-next PATCH 0/8] configuration support for switch headers & phy

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Message-ID: <CA+sq2CfvscPPNTq4PR-6hjYhQuj=u2nmLa0Jq2cKRNCA-PypGQ@mail.gmail.com>
Date:   Thu, 25 Mar 2021 18:32:12 +0530
From:   Sunil Kovvuri <sunil.kovvuri@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Hariprasad Kelam <hkelam@...vell.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Sunil Kovvuri Goutham <sgoutham@...vell.com>,
        Linu Cherian <lcherian@...vell.com>,
        Geethasowjanya Akula <gakula@...vell.com>,
        Jerin Jacob Kollanukkaran <jerinj@...vell.com>,
        Subbaraya Sundeep Bhatta <sbhatta@...vell.com>
Subject: Re: [net-next PATCH 0/8] configuration support for switch headers & phy

On Thu, Mar 25, 2021 at 6:20 PM Andrew Lunn <andrew@...n.ch> wrote:
>
> > > So you completely skipped how this works with mv88e6xxx or
> > > prestera. If you need this private flag for some out of mainline
> > > Marvell SDK, it is very unlikely to be accepted.
> > >
> > >         Andrew
> >
> > What we are trying to do here has no dependency on DSA drivers and
> > neither impacts that functionality.
>
> So this is an indirect way of saying: Yes, this is for some out of
> mainline Marvell SDK.
>
> > Here we are just notifying the HW to parse the packets properly.
>
> But the correct way for this to happen is probably some kernel
> internal API between the MAC and the DSA driver. Mainline probably has
> no need for this private flag.
>
>    Andrew

Didn't get why you say so.
HW expects some info from SW to do the packet parsing properly and
this is specific to this hardware.
How can we generalize this ?
It's not just the DSA tags, the requirement is also for packets with
Higig header ie when system is connected to a switch
which appends Higig2 header to all pkts.

Thanks,
Sunil.