netdev - Re: [net-next PATCH] net: dsa: qca8k: add support for port_change

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Date: Tue, 20 Jun 2023 13:22:57 +0200
From: Christian Marangi <ansuelsmth@...il.com>
To: Andrew Lunn <andrew@...n.ch>, Florian Fainelli <f.fainelli@...il.com>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH] net: dsa: qca8k: add support for
 port_change_master

On Tue, Jun 20, 2023 at 08:37:47AM +0200, Christian Marangi wrote:
> Add support for port_change_master to permit assigning an alternative
> CPU port if the switch have both CPU port connected or create a LAG on
> both CPU port and assign the LAG as DSA master.
> 
> On port change master request, we check if the master is a LAG.
> With LAG we compose the cpu_port_mask with the CPU port in the LAG, if
> master is a simple dsa_port, we derive the index.
> 
> Finally we apply the new cpu_port_mask to the LOOKUP MEMBER to permit
> the port to receive packet by the new CPU port setup for the port and
> we reenable the target port previously disabled.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  drivers/net/dsa/qca/qca8k-8xxx.c | 54 ++++++++++++++++++++++++++++++++
>  drivers/net/dsa/qca/qca8k.h      |  1 +
>  2 files changed, 55 insertions(+)
>

Please ignore I notice some problem and I have to test this further.