linux-kernel - Re: [RFC net-next 2/2] net: dsa: mt7530: trap packets from standalone ports to the CPU

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Date:   Fri, 30 Jul 2021 00:11:45 +0800
From:   DENG Qingfang <dqfext@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev <netdev@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC net-next 2/2] net: dsa: mt7530: trap packets from standalone
 ports to the CPU

On Thu, Jul 29, 2021 at 11:28 PM Vladimir Oltean <olteanv@...il.com> wrote:
> Actually, on second thought...
> If MT7530 supports 8 FIDs and it has 7 ports, then you can assign one
> FID to each standalone port or VLAN-unaware bridge it is a member of.

The problem is, there is no way to do that..

According to the reference manual:
Filter ID is learned automatically from VLAN Table. 0 is the default value if
VLAN Table is not applicable.

So it is always 0 in VLAN-unaware mode.