linux-kernel - Re: [PATCH net 2/2] net: dsa: mt7530: fix port mirroring for MT7988 SoC switch

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Date: Sun, 14 Apr 2024 04:41:16 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: arinc.unal@...nc9.com
Cc: DENG Qingfang <dqfext@...il.com>, Sean Wang <sean.wang@...iatek.com>,
	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>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Holger Stadali <hs@...x.de>,
	Bartel Eerdekens <bartel.eerdekens@...stell8.be>,
	mithat.guner@...ont.com, erkin.bozoglu@...ont.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH net 2/2] net: dsa: mt7530: fix port mirroring for MT7988
 SoC switch

On Sat, Apr 13, 2024 at 04:01:40PM +0300, Arınç ÜNAL via B4 Relay wrote:
> From: Arınç ÜNAL <arinc.unal@...nc9.com>
> 
> The "MT7988A Wi-Fi 7 Generation Router Platform: Datasheet (Open Version)
> v0.1" document shows bits 16 to 18 as the MIRROR_PORT field of the CPU
> forward control register. Currently, the MT7530 DSA subdriver configures
> bits 0 to 2 of the CPU forward control register which breaks the port
> mirroring feature for the MT7988 SoC switch.
> 
> Fix this by using the MT7531_MIRROR_PORT_GET() and MT7531_MIRROR_PORT_SET()
> macros which utilise the correct bits.
> 
> Fixes: 110c18bfed41 ("net: dsa: mt7530: introduce driver for MT7988 built-in switch")
> Signed-off-by: Arınç ÜNAL <arinc.unal@...nc9.com>

Acked-by: Daniel Golle <daniel@...rotopia.org>

> ---
>  drivers/net/dsa/mt7530.c | 10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
> index b84e1845fa02..8090390edaf9 100644
> --- a/drivers/net/dsa/mt7530.c
> +++ b/drivers/net/dsa/mt7530.c
> @@ -1883,14 +1883,16 @@ mt7530_port_vlan_del(struct dsa_switch *ds, int port,
>  
>  static int mt753x_mirror_port_get(unsigned int id, u32 val)
>  {
> -	return (id == ID_MT7531) ? MT7531_MIRROR_PORT_GET(val) :
> -				   MIRROR_PORT(val);
> +	return (id == ID_MT7531 || id == ID_MT7988) ?
> +		       MT7531_MIRROR_PORT_GET(val) :
> +		       MIRROR_PORT(val);
>  }
>  
>  static int mt753x_mirror_port_set(unsigned int id, u32 val)
>  {
> -	return (id == ID_MT7531) ? MT7531_MIRROR_PORT_SET(val) :
> -				   MIRROR_PORT(val);
> +	return (id == ID_MT7531 || id == ID_MT7988) ?
> +		       MT7531_MIRROR_PORT_SET(val) :
> +		       MIRROR_PORT(val);
>  }
>  
>  static int mt753x_port_mirror_add(struct dsa_switch *ds, int port,
> 
> -- 
> 2.40.1
> 
>