From: "Clément Léger" <clement.leger@bootlin.com>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: "Andrew Lunn" <andrew@lunn.ch>,
"Vivien Didelot" <vivien.didelot@gmail.com>,
"Florian Fainelli" <f.fainelli@gmail.com>,
"David S . Miller" <davem@davemloft.net>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Geert Uytterhoeven" <geert+renesas@glider.be>,
"Magnus Damm" <magnus.damm@gmail.com>,
"Heiner Kallweit" <hkallweit1@gmail.com>,
"Russell King" <linux@armlinux.org.uk>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Herve Codina" <herve.codina@bootlin.com>,
"Miquèl Raynal" <miquel.raynal@bootlin.com>,
"Milan Stevanovic" <milan.stevanovic@se.com>,
"Jimmy Lalande" <jimmy.lalande@se.com>,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next 08/12] net: dsa: rzn1-a5psw: add FDB support
Date: Thu, 21 Apr 2022 09:38:03 +0200 [thread overview]
Message-ID: <20220421093803.64ad7cc8@fixe.home> (raw)
In-Reply-To: <20220420195214.dnekbfhha53trbke@skbuf>
Le Wed, 20 Apr 2022 22:52:14 +0300,
Vladimir Oltean <olteanv@gmail.com> a écrit :
> > >
> > > Shouldn't this contain something along the lines of a VID, FID, something?
> >
> > This is extracted directly from the datasheet [1]. The switch FDB table
> > does not seems to store the VID with the entries (See page 300).
> >
> > [1]
> > https://www.renesas.com/us/en/document/mah/rzn1d-group-rzn1s-group-rzn1l-group-users-manual-r-engine-and-ethernet-peripherals
>
> Thanks for the link. I see that the switch has a non-partitionable
> lookup table, not even by VLAN. A shame.
>
> This is also in contrast with the software bridge driver, where FDB and
> MDB entries can have independent destinations per VID.
>
> So there's nothing you can do beyond limiting to a single offloaded
> bridge and hoping for the best w.r.t. per-VLAN forwarding destinations.
>
> Note that if you limit to a single bridge does not mean that you can
> declare ds->fdb_isolation = true. Declaring that would opt you into
> unicast and multicast filtering towards the CPU, i.o.w. a method for
> software to only receive the addresses it has expressed an interest in,
> rather than all packets received on standalone ports. The way that is
> implemented in DSA is by adding FDB and MDB entries on the management
> port, and it would break a lot of things without a partitioning scheme
> for the lookup table.
Thanks Vladimir, it confirms what I thought.
--
Clément Léger,
Embedded Linux and Kernel engineer at Bootlin
https://bootlin.com
next prev parent reply other threads:[~2022-04-21 7:40 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 12:22 [PATCH net-next 00/12] add support for Renesas RZ/N1 ethernet subsystem devices Clément Léger
2022-04-14 12:22 ` [PATCH net-next 01/12] net: dsa: add support for Renesas RZ/N1 A5PSW switch tag code Clément Léger
2022-04-14 13:44 ` Vladimir Oltean
2022-04-14 12:22 ` [PATCH net-next 02/12] net: dsa: add Renesas RZ/N1 switch tag driver Clément Léger
2022-04-14 14:22 ` Vladimir Oltean
2022-04-14 14:35 ` Clément Léger
2022-04-14 15:11 ` Vladimir Oltean
2022-04-14 16:18 ` Clément Léger
2022-04-14 16:23 ` Russell King (Oracle)
2022-04-15 7:23 ` Clément Léger
2022-04-14 22:50 ` Andrew Lunn
2022-04-14 12:22 ` [PATCH net-next 03/12] dt-bindings: net: pcs: add bindings for Renesas RZ/N1 MII converter Clément Léger
2022-04-14 18:59 ` Rob Herring
2022-04-19 13:43 ` Rob Herring
2022-04-19 15:00 ` Clément Léger
2022-04-20 20:11 ` Rob Herring
2022-04-21 7:35 ` Clément Léger
2022-04-14 12:22 ` [PATCH net-next 04/12] net: pcs: add Renesas MII converter driver Clément Léger
2022-04-14 12:49 ` Russell King (Oracle)
2022-04-14 15:14 ` Clément Léger
2022-04-20 13:25 ` Geert Uytterhoeven
2022-04-14 12:22 ` [PATCH net-next 05/12] dt-bindings: net: dsa: add bindings for Renesas RZ/N1 Advanced 5 port switch Clément Léger
2022-04-14 18:59 ` Rob Herring
2022-04-27 12:20 ` Geert Uytterhoeven
2022-04-27 12:56 ` Clément Léger
2022-04-14 12:22 ` [PATCH net-next 06/12] net: dsa: rzn1-a5psw: add Renesas RZ/N1 advanced 5 port switch driver Clément Léger
2022-04-14 13:02 ` Russell King (Oracle)
2022-04-15 8:40 ` Clément Léger
2022-04-15 8:52 ` Russell King (Oracle)
2022-04-14 14:47 ` Vladimir Oltean
2022-04-14 17:51 ` Andrew Lunn
2022-04-15 9:34 ` Clément Léger
2022-04-15 10:55 ` Vladimir Oltean
2022-04-15 11:02 ` Russell King (Oracle)
2022-04-15 11:14 ` Vladimir Oltean
2022-04-15 11:23 ` Russell King (Oracle)
2022-04-15 12:01 ` Vladimir Oltean
2022-04-15 11:05 ` Vladimir Oltean
2022-04-15 12:31 ` Clément Léger
2022-04-15 12:28 ` Clément Léger
2022-04-15 12:41 ` Vladimir Oltean
2022-04-14 17:55 ` Andrew Lunn
2022-04-15 12:33 ` Clément Léger
2022-04-14 12:22 ` [PATCH net-next 07/12] net: dsa: rzn1-a5psw: add statistics support Clément Léger
2022-04-14 17:34 ` Vladimir Oltean
2022-04-15 12:42 ` Clément Léger
2022-04-14 23:16 ` Andrew Lunn
2022-04-15 12:04 ` Clément Léger
2022-04-15 13:37 ` Andrew Lunn
2022-04-15 13:44 ` Clément Léger
2022-04-14 12:22 ` [PATCH net-next 08/12] net: dsa: rzn1-a5psw: add FDB support Clément Léger
2022-04-14 17:51 ` Vladimir Oltean
2022-04-20 8:16 ` Clément Léger
2022-04-20 19:52 ` Vladimir Oltean
2022-04-21 7:38 ` Clément Léger [this message]
2022-04-14 12:22 ` [PATCH net-next 09/12] ARM: dts: r9a06g032: describe MII converter Clément Léger
2022-04-14 23:22 ` Andrew Lunn
2022-04-15 8:24 ` Clément Léger
2022-04-15 14:16 ` Andrew Lunn
2022-04-15 14:38 ` Clément Léger
2022-04-15 15:12 ` Andrew Lunn
2022-04-15 15:29 ` Clément Léger
2022-04-15 16:19 ` Andrew Lunn
2022-04-15 16:45 ` Clément Léger
2022-04-16 13:48 ` Andrew Lunn
2022-04-19 9:03 ` Clément Léger
2022-04-19 12:57 ` Andrew Lunn
2022-04-20 20:16 ` Rob Herring
2022-04-14 12:22 ` [PATCH net-next 10/12] ARM: dts: r9a06g032: describe GMAC2 Clément Léger
2022-04-21 9:31 ` Geert Uytterhoeven
2022-04-14 12:22 ` [PATCH net-next 11/12] ARM: dts: r9a06g032: describe switch Clément Léger
2022-04-21 9:34 ` Geert Uytterhoeven
2022-04-14 12:22 ` [PATCH net-next 12/12] MAINTAINERS: add Renesas RZ/N1 switch related driver entry Clément Léger
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