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b=WOhs+UknWDnRTs/K6H+DNs0ElTRI5p15wW1eoN94RTLcSU0l6hiEtOA0G6efJz+0W+JPRx MAXJYvKzY3zrMBV6aT8gGGiU0YMOHKfm33TJWYlXeFbXa2tFqZFeQDSXuYWeRdQ92qVUCG 84AobJKjrjY1NwTlU+QQdCwIgj45vlmkj3yyB1iTvUMZdwYb34T+TJ6RgswWPzr7eLEYqG TKXb6Sv3VkSj753quEdNVpD8tQTsgOqPSrwj8qBV54tlnKLFrOpHMNS0MkfA68G7p4qHVP RRAHm0447lYNeMmRPhkWsQtp5+mYVF7z2cUWtAgCZ0oDbbCAdDFAogXMiUpDQA== From: Maxime Chevallier To: davem@davemloft.net Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , 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, Antoine Tenart , devicetree@vger.kernel.org, Conor Dooley , Krzysztof Kozlowski , Rob Herring , Romain Gantois , Daniel Golle , Dimitri Fedrau Subject: [PATCH net-next v8 02/15] net: ethtool: common: Indicate that BaseT works on up to 4 lanes Date: Thu, 10 Jul 2025 15:45:19 +0200 Message-ID: <20250710134533.596123-3-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250710134533.596123-1-maxime.chevallier@bootlin.com> References: <20250710134533.596123-1-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-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdefgdegtdehlecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfitefpfffkpdcuggftfghnshhusghstghrihgsvgenuceurghilhhouhhtmecufedtudenucesvcftvggtihhpihgvnhhtshculddquddttddmnecujfgurhephffvvefufffkofgjfhgggfestdekredtredttdenucfhrhhomhepofgrgihimhgvucevhhgvvhgrlhhlihgvrhcuoehmrgigihhmvgdrtghhvghvrghllhhivghrsegsohhothhlihhnrdgtohhmqeenucggtffrrghtthgvrhhnpeevgedtffelffelveeuleelgfejfeevvdejhfehgeefgfffvdefteegvedutefftdenucfkphepvdgrtddumegtsgduleemkegugeehmeegledttdemieehieekmedvlegsudemlegvfhehmegvkegtjeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepihhnvghtpedvrgdtudemtggsudelmeekugegheemgeeltddtmeeiheeikeemvdelsgdumeelvghfheemvgektgejpdhhvghlohepfhgvughorhgrrdhhohhmvgdpmhgrihhlfhhrohhmpehmrgigihhmvgdrtghhvghvrghllhhivghrsegsohhothhlihhnrdgtohhmpdhnsggprhgtphhtthhopeefuddprhgtphhtthhopegurghvvghmsegurghvvghmlhhofhhtrdhnvghtpdhrtghpthhtohepmhgrgihimhgvrdgthhgvvhgrlhhlihgvrhessghoohhtlhhinhdrtghomhdprhgtphhtthhopehnvghtuggvvhesvhhgvghrrdhkv ghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdgrrhhmqdhmshhmsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepthhhohhmrghsrdhpvghtrgiiiihonhhisegsohhothhlihhnrdgtohhmpdhrtghpthhtoheprghnughrvgifsehluhhnnhdrtghhpdhrtghpthhtohepkhhusggrsehkvghrnhgvlhdrohhrgh X-GND-Sasl: maxime.chevallier@bootlin.com Content-Type: text/plain; charset="utf-8" The way BaseT modes (Ethernet over twisted copper pairs) are represented in the kernel are through the following modes : ETHTOOL_LINK_MODE_10baseT_Half ETHTOOL_LINK_MODE_10baseT_Full ETHTOOL_LINK_MODE_100baseT_Half ETHTOOL_LINK_MODE_100baseT_Full ETHTOOL_LINK_MODE_1000baseT_Half ETHTOOL_LINK_MODE_1000baseT_Full ETHTOOL_LINK_MODE_2500baseT_Full ETHTOOL_LINK_MODE_5000baseT_Full ETHTOOL_LINK_MODE_10000baseT_Full ETHTOOL_LINK_MODE_100baseT1_Full ETHTOOL_LINK_MODE_1000baseT1_Full ETHTOOL_LINK_MODE_10baseT1L_Full ETHTOOL_LINK_MODE_10baseT1S_Full ETHTOOL_LINK_MODE_10baseT1S_Half ETHTOOL_LINK_MODE_10baseT1S_P2MP_Half ETHTOOL_LINK_MODE_10baseT1BRR_Full The baseT1* modes explicitly specify that they work on a single, unshielded twister copper pair. However, the other modes do not state the number of pairs that are used to carry the link. 10 and 100BaseT use 2 twisted copper pairs, while 1GBaseT and higher use 4 pairs. although 10 and 100BaseT use 2 pairs, they can work on a Cat3/4/5+ cables that contain 4 pairs. Change the number of pairs associated to BaseT modes to indicate the allowable number of pairs for BaseT. Further commits will then refine the minimum number of pairs required for the linkmode to work. BaseT1 modes aren't affected by this commit. Signed-off-by: Maxime Chevallier --- net/ethtool/common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ethtool/common.c b/net/ethtool/common.c index d62dc56f2f5b..17ee0efc7bc3 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -267,7 +267,7 @@ static_assert(ARRAY_SIZE(link_mode_names) =3D=3D __ETHT= OOL_LINK_MODE_MASK_NBITS); #define __LINK_MODE_LANES_LR8_ER8_FR8 8 #define __LINK_MODE_LANES_LRM 1 #define __LINK_MODE_LANES_MLD2 2 -#define __LINK_MODE_LANES_T 1 +#define __LINK_MODE_LANES_T 4 #define __LINK_MODE_LANES_T1 1 #define __LINK_MODE_LANES_X 1 #define __LINK_MODE_LANES_FX 1 --=20 2.49.0