From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (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 75FC349B1E0 for ; Wed, 9 Sep 2026 09:39:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788946798; cv=none; b=W4CaLAbs0cUD2Nm9M+ne/e0p7odCWFDtWqCFMlFs1b1x5D1maGf7xxJKShTAwUiCB8MQmdPBnouBzcLo1N3xqN3oOBaA26/2XHneCDYjVsFS1GDLUwm2Pwmfm/ZO8BgceoIADoXnj07UyK3W94sKLV3m/QnqbR8Wqp3yqP+S+80= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788946798; c=relaxed/simple; bh=q8syqySWiH+8Yv5J2OJgmyU2V5Gvl+xUuxrGiiadBMo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=fjngQfYp1bu8Vtkl71SjLT4H19ZpWqIPHngsYywwxu/YxvYLaxN1XsN1ORaHRBjzktreMRXVmEWHtl0HxSBYFC4FEwgaZ8ayqzGwS8PPGgZ2LR2MUZlNrYfYFi/VVUhZeIwsJC30jgf6+SAPuhA0u+Qq+sFvcJc683rTxFsfiXk= 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=BI9OnJFY; arc=none smtp.client-ip=185.246.84.56 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="BI9OnJFY" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 039F81A1A7D; Wed, 9 Sep 2026 09:39:55 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id CA95460448; Wed, 9 Sep 2026 09:39:54 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 003CC11C7AF7F; Wed, 9 Sep 2026 11:39:50 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1788946793; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=djF07LBbe1E5mTvU7TPS/wHgSJ+GUxxW8gl5fasZef4=; b=BI9OnJFYZiEk/KO5Ih23RPSCkaeyGujfDyPyVhL+pYHZ8gAndTlBN4VhZwbSkAf+06YkdJ fZb6V5BVbwpjccUSV52DpRvHhIwlEF32xkOHTCK9H87kCOeMABwrTpj6jP2EkGVTlmocOU M8IXb5aZ+zMGmvfPtD9ixPI+XGDnU7K8h6mS4otXGrSmdsffYLqk7wIUdf8G+aqlITZZwE cz+6AaI+If3sfRVhWtfVRj5pcI7enBk7oV3UYpQCkDC8VUv38+PNCpj+7YxdS70yPXza6T b+pky/zRCe1b8lWNyopzRVMGBbnh2venFIPaLqkULdKHhqIxa2h/wJbJWDmPzg== 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 , Frank Wunderlich , Pietro Ameruoso Subject: [PATCH net-next v17 10/10] Documentation: networking: Update the phy_port infrastructure description Date: Wed, 9 Sep 2026 11:39:11 +0200 Message-ID: <20260909093912.1290810-11-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909093912.1290810-1-maxime.chevallier@bootlin.com> References: <20260909093912.1290810-1-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: 8bit X-Last-TLS-Session-Version: TLSv1.3 With SFP now properly supported with phy_port, add some details in the documentation. Fix a typo along the way (driver -> driven). Signed-off-by: Maxime Chevallier --- Documentation/networking/phy-port.rst | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/Documentation/networking/phy-port.rst b/Documentation/networking/phy-port.rst index 6e28d9094bce..2a9b1ec93b70 100644 --- a/Documentation/networking/phy-port.rst +++ b/Documentation/networking/phy-port.rst @@ -99,13 +99,29 @@ will eventually be able to report its own ksettings:: (_____)-----| Port | +------+ +SFP ports +========= + +SFP interfaces involve 2 distinct components, each represented by +a :c:type:`struct phy_port ` instance : + + - The SFP cage itself is a :c:type:`struct phy_port `. It's special + in that it's not an MDI interface, but rather a hot-pluggable MII. + The :c:type:`struct phy_port ` associated to it lists the different + MII interfaces we can use on the cage. + + - The SFP module, when inserted, will also be associated to a + :c:type:`struct phy_port `, that represents the various linkmodes + that it gives access to. The module's :c:type:`struct phy_port ` + doesn't supersede the cage's port, it references it through + the :c:type:`struct phy_port ` :c:member:`upstream_port` field. + Next steps ========== -As of writing this documentation, only ports controlled by PHY devices are -supported. The next steps will be to add the Netlink API to expose these -to userspace and add support for raw ports (controlled by some firmware, and directly -managed by the NIC driver). +As of writing this documentation, the port's presence and information can only +be queried, and it's not possible to change any of the port's settings or select +which one should be used. Another parallel task is the introduction of a MII muxing framework to allow the -control of non-PHY driver multi-port setups. +control of non-PHY driven multi-port setups. -- 2.55.0