From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 927BA2BEC5A for ; Wed, 17 Sep 2025 09:35:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758101749; cv=none; b=J7lLx6lBFc9tFFU+Cg0iQKUHus5UStpZMk0BTGynnbeiHbSHHug+bsalqSDvq/3+mG6WgiqOhE0f4L4uvTwUTz12SfPTrQJxwncM4qftSb2JZlIVQfr9NMdp7WH3ryuvHHuRNkb0Key8fClSegAqeJ5beyz2bxrAqVMbPE5uzMw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758101749; c=relaxed/simple; bh=HuRldwBM6nzFFA0zmpZrhXm4aliMRw2d/I0OOP4HU5c=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=coUHBzsNNvUk0HoVtZFQTZJiHmQHNYHi2Cfu/lAR47CmfV8XJWEb9n9TzPXcxOg9Yopq6Muokkml+uiJL8eG7mf6vhdUiUhyLPTKt8nxYBh964vVNNLDfqS6E7ofIQU8xep4+oHIzLI3h4w/ZJEZEB9pr7WFEC9FjbN2W6eVRBY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Hsxf45wp; arc=none smtp.client-ip=209.85.128.43 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Hsxf45wp" Received: by mail-wm1-f43.google.com with SMTP id 5b1f17b1804b1-45de5a7a080so4663035e9.2 for ; Wed, 17 Sep 2025 02:35:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1758101746; x=1758706546; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=2kOKVRqVF/Jape5mVrAokP6dL8C+/K6JTCB2Gbup70E=; b=Hsxf45wpjRYhq/81Wznx03QSJgInsoRpA2xMDca/BB2FYbxN8/lxvmGC4byySccjvX tzCU3vPJM0Gi4/vekBKRLE6TFnCDXVuiRc5S39I9YZvcQfbHopb3VHYE6FzTQRmeV3XS ygl7XI1F8vnYtHO05JwNfkve6ZdK9Ij3qimCRODmIpqPXiIp/SipSmPrSJalO3R+2VOb chdsoWvRQ3d/pW5ubQoaMzj1d6AboKP/VhUIWv865WPdg3gprBAjM8ey8PyjsOyDADJ1 RZ9Lc15tVPOyZ6R63uE8UfaTWzQu4cCJarPkBvnvdLo9gUhlce19FRGS+2vHLgwXr5GW hJ4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758101746; x=1758706546; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=2kOKVRqVF/Jape5mVrAokP6dL8C+/K6JTCB2Gbup70E=; b=giT3V8uNXr/rLGSWm6XiJrnvsUtvh0pwmbCcnAe3ok988qZoXE99QEkYPC9b11Ylz8 Mjaeot6QByD/kTSXtDmZcnwEUPOvNxbRys1Oco/q3SIq3903YmdqMNdEnGBG2wGVHyZM jlmTZ8zuzWXOEeB9KIC1C/CBredG0AKIC76UiD/3zRFpmuzeNHH00baiV8vOZn25KPtL m7PCpQKcni53E3deed8/7UdLbR+3m3o3SrlDahFmNhGuFLFc2vZvbFI5Kt4r2CC6d86n jZQlGjmjtefqJWLqFSt6nfv2y6yek1vYvBtNk0DboEMRML3RYU+Yvae63qfFs9/6vIpU d3hQ== X-Forwarded-Encrypted: i=1; AJvYcCUj4r3AC6Od5s+hL+ChwZ4WeRZrGr7XglZ98/wbWgxnbBSf2de3WmBjm37EwY46dW8z7K57+Rvumj6h@vger.kernel.org X-Gm-Message-State: AOJu0YwKAkOmM5c5ue0qDupJf9po2gKwDptGXWC3k1DX8P2BoIDJI0Jo IghggO9IPVyPSbB+UdRWBGmnMRdzXAPNcLwv3L6cj3aw3zoJ2aG75xOy X-Gm-Gg: ASbGncuxeERfoz/gdX0w0oQ3ThlhceIEdSyugI+Fz+3EojejPCHmb89MGzyUzHpNhXY wxEdP4vtTv0KJWIYCO+MTSQ5VarEJuxSt3qEOMQlgan7WxMR+nrH0SJSpqYPp3vTnm3RXC+m1lk A8tjYv2YI8/PPWHPf8ng+rUZIgBtB1fOapNRCiBUtthvqgdXYtVI5G4WBnIwd4SGYE6yiksqKNm Z9E8UO4ebuufMzGb7QiL8S6Abc8LMt5zejw7XGeuT0/v7qH53Cl+5c4MYoMPun3gloxlvP0vzKp HSU1/T+ryiPCJr0FbbzyULAEhl9NwH6z+Jbo9veU1JCo9D+me+47T4hn7usreecFuFnfRnO2f4A a6YlX4oV8WgiSknM= X-Google-Smtp-Source: AGHT+IEKahjLn3hsskZUX8TpZV7OWQwmwyggAkHLtboEKsU7Lmkmo3zfNysZqXWAk/VpjouU5E9mvw== X-Received: by 2002:a05:600c:3b27:b0:45c:b565:11f4 with SMTP id 5b1f17b1804b1-462024536a4mr7576795e9.1.1758101745594; Wed, 17 Sep 2025 02:35:45 -0700 (PDT) Received: from skbuf ([2a02:2f04:d005:3b00:8bcc:b603:fee7:a273]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-461394f6081sm29238745e9.20.2025.09.17.02.35.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 17 Sep 2025 02:35:44 -0700 (PDT) Date: Wed, 17 Sep 2025 12:35:41 +0300 From: Vladimir Oltean To: Christian Marangi Cc: Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Heiner Kallweit , Russell King , Simon Horman , "Chester A. Unal" , Daniel Golle , DENG Qingfang , Sean Wang , Matthias Brugger , AngeloGioacchino Del Regno , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [net-next PATCH v18 4/8] net: dsa: tag_mtk: add Airoha variant usage of this TAG Message-ID: <20250917093541.laeswsgzunu3avzp@skbuf> References: <20250915104545.1742-1-ansuelsmth@gmail.com> <20250915104545.1742-1-ansuelsmth@gmail.com> <20250915104545.1742-5-ansuelsmth@gmail.com> <20250915104545.1742-5-ansuelsmth@gmail.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250915104545.1742-5-ansuelsmth@gmail.com> <20250915104545.1742-5-ansuelsmth@gmail.com> On Mon, Sep 15, 2025 at 12:45:40PM +0200, Christian Marangi wrote: > Add variant of the MTK TAG for Airoha Switch and comments about difference > between Airoha AN8855 and Mediatek tag bitmap. > > Airoha AN8855 doesn't support controlling SA learning and Leaky VLAN > from tag. Although these bits are not used (and even not defined for > Leaky VLAN), it's worth to add comments for these difference to prevent > any kind of regression in the future if ever these bits will be used. > > Rework the makefile, config and tag driver to better report to > external tool (like libpcap) the usage of this variant with a dedicated > "Airoha" name. > > Signed-off-by: Christian Marangi > --- > include/net/dsa.h | 2 ++ > net/dsa/Kconfig | 11 +++++++++++ > net/dsa/Makefile | 2 +- > net/dsa/tag_mtk.c | 36 +++++++++++++++++++++++++++++++++--- > 4 files changed, 47 insertions(+), 4 deletions(-) > > diff --git a/include/net/dsa.h b/include/net/dsa.h > index d73ea0880066..bf03493e64ab 100644 > --- a/include/net/dsa.h > +++ b/include/net/dsa.h > @@ -55,6 +55,7 @@ struct tc_action; > #define DSA_TAG_PROTO_LAN937X_VALUE 27 > #define DSA_TAG_PROTO_VSC73XX_8021Q_VALUE 28 > #define DSA_TAG_PROTO_BRCM_LEGACY_FCS_VALUE 29 > +#define DSA_TAG_PROTO_AIROHA_VALUE 30 > > enum dsa_tag_protocol { > DSA_TAG_PROTO_NONE = DSA_TAG_PROTO_NONE_VALUE, > @@ -69,6 +70,7 @@ enum dsa_tag_protocol { > DSA_TAG_PROTO_KSZ9893 = DSA_TAG_PROTO_KSZ9893_VALUE, > DSA_TAG_PROTO_LAN9303 = DSA_TAG_PROTO_LAN9303_VALUE, > DSA_TAG_PROTO_MTK = DSA_TAG_PROTO_MTK_VALUE, > + DSA_TAG_PROTO_AIROHA = DSA_TAG_PROTO_AIROHA_VALUE, > DSA_TAG_PROTO_QCA = DSA_TAG_PROTO_QCA_VALUE, > DSA_TAG_PROTO_TRAILER = DSA_TAG_PROTO_TRAILER_VALUE, > DSA_TAG_PROTO_8021Q = DSA_TAG_PROTO_8021Q_VALUE, > diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig > index 869cbe57162f..7d63ecda25c8 100644 > --- a/net/dsa/Kconfig > +++ b/net/dsa/Kconfig > @@ -98,12 +98,23 @@ config NET_DSA_TAG_EDSA > Say Y or M if you want to enable support for tagging frames for the > Marvell switches which use EtherType DSA headers. > > +config NET_DSA_TAG_MTK_COMMON > + tristate > + > config NET_DSA_TAG_MTK > tristate "Tag driver for Mediatek switches" > + select NET_DSA_TAG_MTK_COMMON > help > Say Y or M if you want to enable support for tagging frames for > Mediatek switches. > > +config NET_DSA_TAG_AIROHA > + tristate "Tag driver for Airoha switches" > + select NET_DSA_TAG_MTK_COMMON > + help > + Say Y or M if you want to enable support for tagging frames for > + Airoha switches. > + > config NET_DSA_TAG_KSZ > tristate "Tag driver for Microchip 8795/937x/9477/9893 families of switches" > help > diff --git a/net/dsa/Makefile b/net/dsa/Makefile > index 555c07cfeb71..7aba189a715c 100644 > --- a/net/dsa/Makefile > +++ b/net/dsa/Makefile > @@ -27,7 +27,7 @@ obj-$(CONFIG_NET_DSA_TAG_GSWIP) += tag_gswip.o > obj-$(CONFIG_NET_DSA_TAG_HELLCREEK) += tag_hellcreek.o > obj-$(CONFIG_NET_DSA_TAG_KSZ) += tag_ksz.o > obj-$(CONFIG_NET_DSA_TAG_LAN9303) += tag_lan9303.o > -obj-$(CONFIG_NET_DSA_TAG_MTK) += tag_mtk.o > +obj-$(CONFIG_NET_DSA_TAG_MTK_COMMON) += tag_mtk.o > obj-$(CONFIG_NET_DSA_TAG_NONE) += tag_none.o > obj-$(CONFIG_NET_DSA_TAG_OCELOT) += tag_ocelot.o > obj-$(CONFIG_NET_DSA_TAG_OCELOT_8021Q) += tag_ocelot_8021q.o > diff --git a/net/dsa/tag_mtk.c b/net/dsa/tag_mtk.c > index b670e3c53e91..32befcbdf4be 100644 > --- a/net/dsa/tag_mtk.c > +++ b/net/dsa/tag_mtk.c > @@ -11,6 +11,7 @@ > #include "tag.h" > > #define MTK_NAME "mtk" > +#define AIROHA_NAME "airoha" > > #define MTK_HDR_LEN 4 > #define MTK_HDR_XMIT_UNTAGGED 0 > @@ -18,6 +19,9 @@ > #define MTK_HDR_XMIT_TAGGED_TPID_88A8 2 > #define MTK_HDR_RECV_SOURCE_PORT_MASK GENMASK(2, 0) > #define MTK_HDR_XMIT_DP_BIT_MASK GENMASK(5, 0) > +/* AN8855 doesn't support SA_DIS and Leaky VLAN > + * control in tag as these bits doesn't exist. > + */ > #define MTK_HDR_XMIT_SA_DIS BIT(6) > > static struct sk_buff *mtk_tag_xmit(struct sk_buff *skb, > @@ -94,6 +98,7 @@ static struct sk_buff *mtk_tag_rcv(struct sk_buff *skb, struct net_device *dev) > return skb; > } > > +#if IS_ENABLED(CONFIG_NET_DSA_TAG_MTK) > static const struct dsa_device_ops mtk_netdev_ops = { > .name = MTK_NAME, > .proto = DSA_TAG_PROTO_MTK, > @@ -102,8 +107,33 @@ static const struct dsa_device_ops mtk_netdev_ops = { > .needed_headroom = MTK_HDR_LEN, > }; > > -MODULE_DESCRIPTION("DSA tag driver for Mediatek switches"); > -MODULE_LICENSE("GPL"); > +DSA_TAG_DRIVER(mtk_netdev_ops); > MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_MTK, MTK_NAME); > +#endif > > -module_dsa_tag_driver(mtk_netdev_ops); > +#if IS_ENABLED(CONFIG_NET_DSA_TAG_AIROHA) > +static const struct dsa_device_ops airoha_netdev_ops = { > + .name = AIROHA_NAME, > + .proto = DSA_TAG_PROTO_AIROHA, > + .xmit = mtk_tag_xmit, > + .rcv = mtk_tag_rcv, > + .needed_headroom = MTK_HDR_LEN, > +}; > + > +DSA_TAG_DRIVER(airoha_netdev_ops); > +MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_AIROHA, AIROHA_NAME); > +#endif > + > +static struct dsa_tag_driver *dsa_tag_driver_array[] = { > +#if IS_ENABLED(CONFIG_NET_DSA_TAG_MTK) > + &DSA_TAG_DRIVER_NAME(mtk_netdev_ops), > +#endif > +#if IS_ENABLED(CONFIG_NET_DSA_TAG_AIROHA) > + &DSA_TAG_DRIVER_NAME(airoha_netdev_ops), > +#endif Unless the few tens of bytes saved matter on OpenWRT, I think this is overkill (and you went too far with my previous suggestion). Two Kconfig options are unnecessary from a maintainance point of view (and config NET_DSA_AN8855 isn't even selecting the correct one!). I suggest you register both tag drivers as part of CONFIG_NET_DSA_TAG_MTK, at least until the differences increase to justify a new option. > +}; > + > +module_dsa_tag_drivers(dsa_tag_driver_array); > + > +MODULE_DESCRIPTION("DSA tag driver for Mediatek switches"); > +MODULE_LICENSE("GPL"); > -- > 2.51.0 >