From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) (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 1FBE5284880 for ; Sun, 27 Sep 2026 22:37:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790548641; cv=none; b=eOFD2p0stuj/9xOzr/54BbOZgkMNMxWyEmpKBc3JVvcJ2d1XMDI6abVMtgNQcP5V0MJ5pQ037r4C90vrVrYUUyGbVGuNd4c+3CzmkMJ9rG9AyabOD/X2ZzdOlA5DtjsNmGq6VbHk7Ov/yGlmWMzxS+CHwajgSnu6hVbKQHiaRxQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790548641; c=relaxed/simple; bh=M68xv6HlU6/MqcTSfEZ0+bgus933krCLokA4of/Bqpc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=aUHxwqpo6kqiZJ0pHz4GXoyHaqfWKZ9oMbY7OSjD2Loe+rFB+E+6c+E+i9xwIkVMcoEqfoT8frgcZsvmHf4V33D2ic2qui8OGIqUiom0aOSjzznGqLqkvt+6GE+8/FNTeOPU2psUmhjjercXOOcDGygYnfAiobX3wo1m0c77Ygc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=gyUScxTm; arc=none smtp.client-ip=192.198.163.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="gyUScxTm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1790548638; x=1822084638; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=M68xv6HlU6/MqcTSfEZ0+bgus933krCLokA4of/Bqpc=; b=gyUScxTmmVlqnYFHcw2gwmEV209+Ur6o2fLIqCiOh4ijzx/DraQRqQ+J iGpIVFNKOBcRQcXOkKKJgXeFuoqL4BRsFBAldBGvIMeSbbi2GFhYnq8kV EmsSwqDCU4Lg9b2ITmn9PsWDZGCYGQjuyvE7LLvdqBndHLB//H2Qdlqgn hf06tuPMthxbPvWDmFoTj56vnglPbmM009oiQFfK5/n0ruWR3M/+Udd+l LNrO1X+9iYwSAXvPD1ePyhC/3YTfzimymtEifP3CmJ4fiM5nSR3DWwrqL f8V85PL54hEAx04FVXnV0p/ty1FJVDMKeIst1Enz4TGXvZBMez56yTcpI A==; X-CSE-ConnectionGUID: McpUC+3pTG2A9LFFYNF8dA== X-CSE-MsgGUID: Lytyzc1NSN+MLSvdssFNKg== X-IronPort-AV: E=McAfee;i="6800,10657,11918"; a="102617780" X-IronPort-AV: E=Sophos;i="6.27,127,1787036400"; d="scan'208";a="102617780" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Sep 2026 15:37:16 -0700 X-CSE-ConnectionGUID: Azm/W2qtTaGxL3vm4UbXUw== X-CSE-MsgGUID: oBsaebCIRHuCXP2YOcFVrQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,127,1787036400"; d="scan'208";a="271365760" Received: from unknown (HELO axxiablr1.gar.corp.intel.com) ([10.190.162.100]) by fmviesa009.fm.intel.com with ESMTP; 27 Sep 2026 15:37:10 -0700 From: Siddaraju DH To: netdev@vger.kernel.org, Andrew Lunn , Maxime Chevallier , Michal Kubecek Cc: Siddaraju DH , Vijay Srinivasan , Balaji Chintalapalle , Shubham Das , Susheela M Doddagoudar , Sridhar Samudrala , Jacob E Keller , Anthony L Nguyen , Magnus Lindberg , Niklas Damberg , Jonas Wirandi , Anjali Singhai , Jesse Brandeburg , David Laight , Eric Joyner , Jakub Kicinski , "David S . Miller" , Eric Dumazet , Paolo Abeni Subject: [RFC PATCH net-next] net: ethtool: add BaseC2C medium & AUI C2C link modes Date: Mon, 28 Sep 2026 04:06:56 +0530 Message-Id: <20260927223656.2528362-1-siddaraju.dh@intel.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit IEEE 802.3 defines a family of chip-to-chip (C2C) Attachment Unit Interfaces (AUI) and SFF-8418 defines the 10 Gb/s SFI equivalent. These are electrical interfaces between two ICs on the same board, with a fully specified lane count, signalling rate and modulation. Add a new BaseC2C link medium (ETHTOOL_LINK_MEDIUM_BASEC2C) and the following C2C link modes, that will use the BaseC2C medium: ========================================================== Link mode Interface #Lane Specification ========================================================== 10Gb/s per lane (NRZ, 10.3125 GBd) 10000baseC2C/Full 10G SFI C2C 1 SFF-8418 25Gb/s per lane (NRZ, 25.78125 GBd) 25000baseC2C/Full 25GAUI C2C 1 IEEE 802.3-2018 Annex 109A 50000baseC2C2/Full LAUI-2 C2C 2 IEEE 802.3-2022 Annex 135B 100000baseC2C4/Full CAUI-4 C2C 4 IEEE 802.3-2018 Annex 83D 50Gb/s per lane (PAM4, 26.5625 GBd) 50000baseC2C/Full 50GAUI-1 C2C 1 IEEE 802.3-2022 Annex 135F 100000baseC2C2/Full 100GAUI-2 C2C 2 IEEE 802.3-2022 Annex 135F 200000baseC2C4/Full 200GAUI-4 C2C 4 IEEE 802.3-2022 Annex 120D 100Gb/s per lane (PAM4, 53.125 GBd) 100000baseC2C/Full 100GAUI-1 C2C 1 IEEE 802.3ck Annex 120F 200000baseC2C2/Full 200GAUI-2 C2C 2 IEEE 802.3ck Annex 120F 400000baseC2C4/Full 400GAUI-4 C2C 4 IEEE 802.3ck Annex 120F All new modes will use the BaseC2C medium. Link: https://lore.kernel.org/netdev/SN7PR11MB6900FFD91358B67F27D981A19ACC2@SN7PR11MB6900.namprd11.prod.outlook.com/T/#u Signed-off-by: Siddaraju DH --- include/linux/ethtool.h | 1 + include/uapi/linux/ethtool.h | 11 +++++++++++ net/ethtool/common.c | 24 ++++++++++++++++++++++++ 3 files changed, 36 insertions(+) diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h index c4c9ce0..4c9dac8 100644 --- a/include/linux/ethtool.h +++ b/include/linux/ethtool.h @@ -247,6 +247,7 @@ enum ethtool_link_medium { ETHTOOL_LINK_MEDIUM_BASEF, ETHTOOL_LINK_MEDIUM_BASEV, ETHTOOL_LINK_MEDIUM_BASEMLD, + ETHTOOL_LINK_MEDIUM_BASEC2C, ETHTOOL_LINK_MEDIUM_NONE, __ETHTOOL_LINK_MEDIUM_LAST, diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h index 986d70c..8cc956e 100644 --- a/include/uapi/linux/ethtool.h +++ b/include/uapi/linux/ethtool.h @@ -2103,6 +2103,17 @@ enum ethtool_link_mode_bit_indices { ETHTOOL_LINK_MODE_1600000baseKR8_Full_BIT = 122, ETHTOOL_LINK_MODE_1600000baseDR8_Full_BIT = 123, ETHTOOL_LINK_MODE_1600000baseDR8_2_Full_BIT = 124, + /* Chip-to-chip Attachment Unit Interfaces (AUI C2C) */ + ETHTOOL_LINK_MODE_10000baseC2C_Full_BIT = 125, /* 10G-SFI-C2C SFF-8418 */ + ETHTOOL_LINK_MODE_25000baseC2C_Full_BIT = 126, + ETHTOOL_LINK_MODE_50000baseC2C2_Full_BIT = 127, + ETHTOOL_LINK_MODE_100000baseC2C4_Full_BIT = 128, + ETHTOOL_LINK_MODE_50000baseC2C_Full_BIT = 129, + ETHTOOL_LINK_MODE_100000baseC2C2_Full_BIT = 130, + ETHTOOL_LINK_MODE_200000baseC2C4_Full_BIT = 131, + ETHTOOL_LINK_MODE_100000baseC2C_Full_BIT = 132, + ETHTOOL_LINK_MODE_200000baseC2C2_Full_BIT = 133, + ETHTOOL_LINK_MODE_400000baseC2C4_Full_BIT = 134, /* must be last entry */ __ETHTOOL_LINK_MODE_MASK_NBITS diff --git a/net/ethtool/common.c b/net/ethtool/common.c index b4e766e..96350db 100644 --- a/net/ethtool/common.c +++ b/net/ethtool/common.c @@ -242,6 +242,16 @@ const char link_mode_names[][ETH_GSTRING_LEN] = { __DEFINE_LINK_MODE_NAME(1600000, KR8, Full), __DEFINE_LINK_MODE_NAME(1600000, DR8, Full), __DEFINE_LINK_MODE_NAME(1600000, DR8_2, Full), + __DEFINE_LINK_MODE_NAME(10000, C2C, Full), + __DEFINE_LINK_MODE_NAME(25000, C2C, Full), + __DEFINE_LINK_MODE_NAME(50000, C2C2, Full), + __DEFINE_LINK_MODE_NAME(100000, C2C4, Full), + __DEFINE_LINK_MODE_NAME(50000, C2C, Full), + __DEFINE_LINK_MODE_NAME(100000, C2C2, Full), + __DEFINE_LINK_MODE_NAME(200000, C2C4, Full), + __DEFINE_LINK_MODE_NAME(100000, C2C, Full), + __DEFINE_LINK_MODE_NAME(200000, C2C2, Full), + __DEFINE_LINK_MODE_NAME(400000, C2C4, Full), }; static_assert(ARRAY_SIZE(link_mode_names) == __ETHTOOL_LINK_MODE_MASK_NBITS); @@ -289,6 +299,9 @@ static_assert(ARRAY_SIZE(link_mode_names) == __ETHTOOL_LINK_MODE_MASK_NBITS); #define __LINK_MODE_LANES_VR8 8 #define __LINK_MODE_LANES_DR8_2 8 #define __LINK_MODE_LANES_T1BRR 1 +#define __LINK_MODE_LANES_C2C 1 +#define __LINK_MODE_LANES_C2C2 2 +#define __LINK_MODE_LANES_C2C4 4 #define __DEFINE_LINK_MODE_PARAMS_PAIRS(_speed, _type, _min_pairs, _pairs, _duplex, _medium) \ [ETHTOOL_LINK_MODE(_speed, _type, _duplex)] = { \ @@ -469,6 +482,16 @@ const struct link_mode_info link_mode_params[] = { __DEFINE_LINK_MODE_PARAMS(1600000, KR8, Full, K), __DEFINE_LINK_MODE_PARAMS(1600000, DR8, Full, D), __DEFINE_LINK_MODE_PARAMS(1600000, DR8_2, Full, D), + __DEFINE_LINK_MODE_PARAMS(10000, C2C, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(25000, C2C, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(50000, C2C2, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(100000, C2C4, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(50000, C2C, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(100000, C2C2, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(200000, C2C4, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(100000, C2C, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(200000, C2C2, Full, C2C), + __DEFINE_LINK_MODE_PARAMS(400000, C2C4, Full, C2C), }; static_assert(ARRAY_SIZE(link_mode_params) == __ETHTOOL_LINK_MODE_MASK_NBITS); EXPORT_SYMBOL_GPL(link_mode_params); @@ -484,6 +507,7 @@ static const char ethtool_link_medium_names[][ETH_GSTRING_LEN] = { [ETHTOOL_LINK_MEDIUM_BASEF] = "BaseF", [ETHTOOL_LINK_MEDIUM_BASEV] = "BaseV", [ETHTOOL_LINK_MEDIUM_BASEMLD] = "BaseMLD", + [ETHTOOL_LINK_MEDIUM_BASEC2C] = "BaseC2C", [ETHTOOL_LINK_MEDIUM_NONE] = "None", }; static_assert(ARRAY_SIZE(ethtool_link_medium_names) == __ETHTOOL_LINK_MEDIUM_LAST); -- 2.25.1