From patchwork Thu Jan 9 15:15:11 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Russell King (Oracle)" X-Patchwork-Id: 13932883 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [78.32.30.218]) (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 09DE921C167 for ; Thu, 9 Jan 2025 15:16:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=78.32.30.218 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736435774; cv=none; b=GsZgNP9KUnYWFhqqXz3LP7DgEaB7qi4mK+CD/6b0Ms97gqb+JYnMc+nus7FT/rQQxnNkWpfFIXkX16jWwjp/0bQp0Cn/7K8RhlzNWvzpolgT/ZVAfV/HuyjRbbagg0e0G2wxZZdDGis7mYrZBRVBSDU64IS3cf5+QgGgX39tGbI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1736435774; c=relaxed/simple; bh=2/mH/dh+L+INYwLeVhhjKzMuzAKZOx2twcedb9u+1js=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=RRKMOvXwsl5ubKJCiu6hGIGgFC661fcp+8cYY07wgYC044aO+Ov9mkkReRhNpBP3lk8EfxrlXYspeimv6M1XHMI2R7SlgtQ5EZQoueWZFNcOPFNJNeHv0rAbUGmxnNqjKWd31sboWlYKljbL1QTCm8WN0O3P/g1Wf3xmrdunPmI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk; spf=none smtp.mailfrom=armlinux.org.uk; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b=nYLMZl3K; arc=none smtp.client-ip=78.32.30.218 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=armlinux.org.uk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=armlinux.org.uk header.i=@armlinux.org.uk header.b="nYLMZl3K" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:Content-Type:MIME-Version: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=pu7iKMgFtLxoX0yqIz2R3oUnaHmPu6/03Ud8YYLEne4=; b=nYLMZl3Kke+BNNOpQ7d/djHSTH Rf+A2ly5KkGFLUD1NF6skHEPqKTBL4KSq0HsjWD8Rr7SDmczQBAlYzA0sfyAQN3kNDqCI0YWOKWyr x1/qi1ScIsz5dlXoJBeAB/ShUhk86wY08BRnx42MVr64sjC1Z2w9gt5REcQhxxOj8zN+biE6VOVMw JBIDzOrgfF8Qq4xIbwOxL1Jo7aVyiCFgviBPJ2cL1CYd7ka6xDagYKd3yQwkkE9x8tFqvhkXpA0gY SYIIQrwiZO1bjzeNB7VJ3xSSy7vsRObANsYPqmIDAIg9XUrj6Gp2VLTpx7OAljHiIo2nCnBywQt7k EhPwMOpQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:40130) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1tVuFk-0002Cp-0K; Thu, 09 Jan 2025 15:15:20 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.96) (envelope-from ) id 1tVuFb-0007PQ-1c; Thu, 09 Jan 2025 15:15:11 +0000 Date: Thu, 9 Jan 2025 15:15:11 +0000 From: "Russell King (Oracle)" To: Andrew Lunn , Heiner Kallweit Cc: Alexander Couzens , Alexander Duyck , Andrew Lunn , AngeloGioacchino Del Regno , =?utf-8?b?QXLEsW7DpyDDnE5BTA==?= , Claudiu Beznea , Daniel Golle , Daniel Machon , "David S. Miller" , DENG Qingfang , Eric Dumazet , Eric Woudstra , Florian Fainelli , Horatiu Vultur , Ioana Ciornei , Jakub Kicinski , Jose Abreu , kernel-team@meta.com, Lars Povlsen , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Madalin Bucur , Marcin Wojtas , Matthias Brugger , Michal Simek , netdev@vger.kernel.org, Nicolas Ferre , Paolo Abeni , Radhey Shyam Pandey , Sean Anderson , Sean Wang , Steen Hegelund , Taras Chornyi , UNGLinuxDriver@microchip.com, Vladimir Oltean Subject: [PATCH net-next 0/5] net: phylink: fix PCS without autoneg Message-ID: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline Sender: Russell King (Oracle) X-Patchwork-Delegate: kuba@kernel.org Hi, Eric Woudstra reported that a PCS attached using 2500base-X does not see link when phylink is using in-band mode, but autoneg is disabled, despite there being a valid 2500base-X signal being received. We have these settings: act_link_an_mode = MLO_AN_INBAND pcs_neg_mode = PHYLINK_PCS_NEG_INBAND_DISABLED Eric diagnosed it to phylink_decode_c37_word() setting state->link false because the full-duplex bit isn't set in the non-existent link partner advertisement word (which doesn't exist because in-band autoneg is disabled!) The test in phylink_mii_c22_pcs_decode_state() is supposed to catch this state, but since we converted PCS to use neg_mode, testing the Autoneg in the local advertisement is no longer sufficient - we need to be looking at the neg_mode, which currently isn't provided. We need to provide this via the .pcs_get_state() method, and this will require modifying all PCS implementations to add the extra argument to this method. Patch 1 uses the PCS neg_mode in phylink_mac_pcs_get_state() to correct the now obsolute usage of the Autoneg bit in the advertisement. Patch 2 passes neg_mode into the .pcs_get_state() method, and updates all users. Patch 3 adds neg_mode as an argument to the various clause 22 state decoder functions in phylink, modifying drivers to pass the neg_mode through. Patch 4 makes use of phylink_mii_c22_pcs_decode_state() rather than using the Autoneg bit in the advertising field. Patch 5 may be required for Eric's case - it ensures that we report the correct state for interface types that we support only one set of modes for when autoneg is disabled. drivers/net/dsa/b53/b53_serdes.c | 4 +- drivers/net/dsa/mt7530.c | 2 +- drivers/net/dsa/mv88e6xxx/pcs-6185.c | 1 + drivers/net/dsa/mv88e6xxx/pcs-6352.c | 1 + drivers/net/dsa/mv88e6xxx/pcs-639x.c | 5 +- drivers/net/dsa/qca/qca8k-8xxx.c | 2 +- drivers/net/ethernet/cadence/macb_main.c | 3 +- drivers/net/ethernet/freescale/fman/fman_dtsec.c | 4 +- drivers/net/ethernet/marvell/mvneta.c | 2 +- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 + .../net/ethernet/marvell/prestera/prestera_main.c | 1 + drivers/net/ethernet/meta/fbnic/fbnic_phylink.c | 2 +- .../net/ethernet/microchip/lan966x/lan966x_main.h | 2 +- .../ethernet/microchip/lan966x/lan966x_phylink.c | 3 +- .../net/ethernet/microchip/lan966x/lan966x_port.c | 4 +- .../net/ethernet/microchip/sparx5/sparx5_phylink.c | 2 +- drivers/net/ethernet/xilinx/xilinx_axienet_main.c | 3 +- drivers/net/pcs/pcs-lynx.c | 4 +- drivers/net/pcs/pcs-mtk-lynxi.c | 4 +- drivers/net/pcs/pcs-xpcs.c | 7 +-- drivers/net/phy/phylink.c | 60 ++++++++++++++++------ include/linux/phylink.h | 11 ++-- 22 files changed, 87 insertions(+), 42 deletions(-)