linux-kernel - Re: [PATCH net-next v3 4/5] net: dsa: mv88e6xxx: Add support for bridge port locked mode

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Date:   Sat, 19 Feb 2022 12:00:34 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Hans Schultz <schultz.hans@...il.com>
Cc:     davem@...emloft.net, kuba@...nel.org, netdev@...r.kernel.org,
        Hans Schultz <schultz.hans+netdev@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Roopa Prabhu <roopa@...dia.com>,
        Nikolay Aleksandrov <nikolay@...dia.com>,
        Shuah Khan <shuah@...nel.org>,
        Stephen Suryaputra <ssuryaextr@...il.com>,
        David Ahern <dsahern@...nel.org>,
        Ido Schimmel <idosch@...dia.com>,
        Petr Machata <petrm@...dia.com>,
        Amit Cohen <amcohen@...dia.com>,
        Po-Hsu Lin <po-hsu.lin@...onical.com>,
        Baowen Zheng <baowen.zheng@...igine.com>,
        linux-kernel@...r.kernel.org, bridge@...ts.linux-foundation.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net-next v3 4/5] net: dsa: mv88e6xxx: Add support for
 bridge port locked mode

On Fri, Feb 18, 2022 at 04:51:47PM +0100, Hans Schultz wrote:
> diff --git a/drivers/net/dsa/mv88e6xxx/port.c b/drivers/net/dsa/mv88e6xxx/port.c
> index ab41619a809b..46b7381899a0 100644
> --- a/drivers/net/dsa/mv88e6xxx/port.c
> +++ b/drivers/net/dsa/mv88e6xxx/port.c
> @@ -1234,6 +1234,39 @@ int mv88e6xxx_port_set_mirror(struct mv88e6xxx_chip *chip, int port,
>  	return err;
>  }
>  
> +int mv88e6xxx_port_set_lock(struct mv88e6xxx_chip *chip, int port,
> +			    bool locked)
> +{
> +	u16 reg;
> +	int err;
> +
> +	err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_CTL0, &reg);
> +	if (err)
> +		return err;
> +
> +	reg &= ~MV88E6XXX_PORT_CTL0_SA_FILT_MASK;
> +	if (locked)
> +		reg |= MV88E6XXX_PORT_CTL0_SA_FILT_DROP_ON_LOCK;
> +
> +	err = mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_CTL0, reg);
> +	if (err)
> +		return err;
> +
> +	err = mv88e6xxx_port_read(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, &reg);
> +	if (err)
> +		return err;
> +
> +	reg &= ~MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
> +	if (locked)
> +		reg |= MV88E6XXX_PORT_ASSOC_VECTOR_LOCKED_PORT;
> +
> +	err = mv88e6xxx_port_write(chip, port, MV88E6XXX_PORT_ASSOC_VECTOR, reg);

	return mv88e6xxx_port_write(...);

> +	if (err)
> +		return err;
> +
> +	return 0;
> +}