From nobody Sun Feb 8 16:50:12 2026 Received: from smtpout-03.galae.net (smtpout-03.galae.net [185.246.85.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D29712417FB for ; Sun, 1 Feb 2026 15:13:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.85.4 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769958802; cv=none; b=WVRFoNuke+95A3MNINRJB9SvoE8JEtfHCWuH/UsrIOvn7Lo0qAgLwisg/2pz6v+ug8EcODJ83fDT0rG6eSDCRBWyjlk+jMvD2whq21WCpXyqmWuuHByq0Y0XwR67XaMMpRXhSMIHymmIbbVjTOdyjUEp5IA0ZyR9oFT7HEPRXzM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769958802; c=relaxed/simple; bh=kxYprBgxtxpbPjIF2eIjiXbk7fRIQtp2OGCSGG0bxyU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=iTsTVfaTALy26qQP7VEz4iPzL8mql4daMJEZ0tn6X/kbZZXXhzs8t1CpZBsld0ieNQPWSx8qoOzpsSjITJBWfMhwkH5xy8QRDA8QqWUrtq6PYSfkcGDj6jDTNub0pZVt4q7EHsqehv8SJYaarRSrOdQxafHGmOxRKMWygr5WUrY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=xVX4NnAd; arc=none smtp.client-ip=185.246.85.4 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="xVX4NnAd" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-03.galae.net (Postfix) with ESMTPS id 89ADF4E423A8; Sun, 1 Feb 2026 15:13:19 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 5EEAF60720; Sun, 1 Feb 2026 15:13:19 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 8B300119A88F8; Sun, 1 Feb 2026 16:13:15 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1769958798; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=9VMJCSTaZs0qZ6Spe9WxRX/vem2r/rMxnfYcMsORs4w=; b=xVX4NnAd+KVMRc4UAPQMbhqdCBExBVpjEqV4s8rtjZimi9AUpepP3rOgiYMTECcE6HWb5b ChzebL0SLKnrLt2clOxUCT7apzYAyoUSkNMriVZN+Ce+VUi4d7x9kfahMSNiM8ZnClspcG OmInr92sDBqtthMnoiZgWqpQmaToiAD8Vg2kKztNKzH5ycNU5qSVx5wNB4A2RJQe9DsWe/ +bU+Bcje1z1U0HPxGNcigPYyazWg8uWRK4y2UI6FhMfB/HJsIjdT+6T5HyRzHWRrI6vdNV H/Y2fhFx2tE2LuO/SEU5uKFYVNpMUbOPYGcP2MehKCtUM67gx7ZoaakWaiIxuA== From: Maxime Chevallier To: davem@davemloft.net, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , Heiner Kallweit Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Christophe Leroy , Herve Codina , Florian Fainelli , Vladimir Oltean , =?UTF-8?q?K=C3=B6ry=20Maincent?= , =?UTF-8?q?Marek=20Beh=C3=BAn?= , Oleksij Rempel , =?UTF-8?q?Nicol=C3=B2=20Veronese?= , Simon Horman , mwojtas@chromium.org, Romain Gantois , Daniel Golle , Dimitri Fedrau Subject: [PATCH net-next v3 04/11] net: phylink: Register a phy_port for MAC-driven SFP busses Date: Sun, 1 Feb 2026 16:12:41 +0100 Message-ID: <20260201151249.642015-5-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260201151249.642015-1-maxime.chevallier@bootlin.com> References: <20260201151249.642015-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Content-Type: text/plain; charset="utf-8" phy_port tracks the interfaces that a netdevice feeds into. SFP cages are such ports, but so far we are only tracking the ones that are driven by PHYs acting as media-converters. Let's populate a phy_port for MAC driver SFP cages, handled by phylink. This phy_port represents the SFP cage itself, and not the module that may be plugged into it. It's therefore not an MDI interface, so only the 'interfaces' field is relevant here. The phy_port is only populated for 'NETDEV' phylink instances, as otherwise we don't have any topology to attach the port to. Signed-off-by: Maxime Chevallier --- drivers/net/phy/phylink.c | 53 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c index e1f01d7fc4da..7a07de1d42bb 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -14,6 +14,8 @@ #include #include #include +#include +#include #include #include #include @@ -93,6 +95,7 @@ struct phylink { DECLARE_PHY_INTERFACE_MASK(sfp_interfaces); __ETHTOOL_DECLARE_LINK_MODE_MASK(sfp_support); u8 sfp_port; + struct phy_port *sfp_bus_port; =20 struct eee_config eee_cfg; =20 @@ -1758,6 +1761,46 @@ static void phylink_fixed_poll(struct timer_list *t) =20 static const struct sfp_upstream_ops sfp_phylink_ops; =20 +static int phylink_create_sfp_port(struct phylink *pl) +{ + struct phy_port *port; + int ret =3D 0; + + if (!pl->netdev || !pl->sfp_bus) + return 0; + + port =3D phy_port_alloc(); + if (!port) + return -ENOMEM; + + port->is_sfp =3D true; + port->is_mii =3D true; + port->active =3D true; + + phy_interface_and(port->interfaces, pl->config->supported_interfaces, + phylink_sfp_interfaces); + phy_port_update_supported(port); + + ret =3D phy_link_topo_add_port(pl->netdev, port); + if (ret) + phy_port_destroy(port); + else + pl->sfp_bus_port =3D port; + + return ret; +} + +static void phylink_destroy_sfp_port(struct phylink *pl) +{ + if (pl->netdev && pl->sfp_bus_port) + phy_link_topo_del_port(pl->netdev, pl->sfp_bus_port); + + if (pl->sfp_bus_port) + phy_port_destroy(pl->sfp_bus_port); + + pl->sfp_bus_port =3D NULL; +} + static int phylink_register_sfp(struct phylink *pl, const struct fwnode_handle *fwnode) { @@ -1775,9 +1818,18 @@ static int phylink_register_sfp(struct phylink *pl, =20 pl->sfp_bus =3D bus; =20 + ret =3D phylink_create_sfp_port(pl); + if (ret) { + sfp_bus_put(bus); + return ret; + } + ret =3D sfp_bus_add_upstream(bus, pl, &sfp_phylink_ops); sfp_bus_put(bus); =20 + if (ret) + phylink_destroy_sfp_port(pl); + return ret; } =20 @@ -1939,6 +1991,7 @@ EXPORT_SYMBOL_GPL(phylink_create); void phylink_destroy(struct phylink *pl) { sfp_bus_del_upstream(pl->sfp_bus); + phylink_destroy_sfp_port(pl); if (pl->link_gpio) gpiod_put(pl->link_gpio); =20 --=20 2.49.0