netdev - Re: [PATCH net-next v3 2/3] net: dsa: integrate with SWITCHDEV for HW bridging

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Date:	Tue, 24 Feb 2015 21:44:28 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
CC:	davem@...emloft.net, vivien.didelot@...oirfairelinux.com,
	jerome.oufella@...oirfairelinux.com, andrew@...n.ch,
	cphealy@...il.com
Subject: Re: [PATCH net-next v3 2/3] net: dsa: integrate with SWITCHDEV for
 HW bridging

On 02/24/2015 01:15 PM, Florian Fainelli wrote:
> In order to support bridging offloads in DSA switch drivers, select
> NET_SWITCHDEV to get access to the port_stp_update and parent_get_id
> NDOs that we are required to implement.
>
> To facilitate the integratation at the DSA driver level, we implement 3
> types of operations:
>
> - port_join_bridge
> - port_leave_bridge
> - port_stp_update
>
> DSA will resolve which switch ports that are currently bridge port
> members as some Switch hardware/drivers need to know about that to limit
> the register programming to just the relevant registers (especially for
> slow MDIO buses).
>
> We also take care of setting the correct STP state when slave network
> devices are brought up/down while being bridge members.
>
> Finally, when a port is leaving the bridge, we make sure we set in
> BR_STATE_FORWARDING state, otherwise the bridge layer would leave it
> disabled as a result of having left the bridge.
>
> Signed-off-by: Florian Fainelli <f.fainelli@...il.com>

Reviewed-by: Guenter Roeck <linux@...ck-us.net>

And with my code adding support for HW bridging to the mv88e6352 driver:

Tested-by: Guenter Roeck <linux@...ck-us.net>

Guenter

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