From patchwork Wed Jan 20 09:37:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Danielle Ratson X-Patchwork-Id: 12032101 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EFDA5C43332 for ; Wed, 20 Jan 2021 11:21:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B780823331 for ; Wed, 20 Jan 2021 11:21:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388996AbhATLPE (ORCPT ); Wed, 20 Jan 2021 06:15:04 -0500 Received: from hqnvemgate24.nvidia.com ([216.228.121.143]:13479 "EHLO hqnvemgate24.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731541AbhATJim (ORCPT ); Wed, 20 Jan 2021 04:38:42 -0500 Received: from hqmail.nvidia.com (Not Verified[216.228.121.13]) by hqnvemgate24.nvidia.com (using TLS: TLSv1.2, AES256-SHA) id ; Wed, 20 Jan 2021 01:37:37 -0800 Received: from dev-r-vrt-156.mtr.labs.mlnx (172.20.145.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 20 Jan 2021 09:37:34 +0000 From: Danielle Ratson To: CC: , , , , , , , , Danielle Ratson Subject: [PATCH net-next v3 3/7] ethtool: Expose the number of lanes in use Date: Wed, 20 Jan 2021 11:37:09 +0200 Message-ID: <20210120093713.4000363-4-danieller@nvidia.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210120093713.4000363-1-danieller@nvidia.com> References: <20210120093713.4000363-1-danieller@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [172.20.145.6] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1611135457; bh=cvmwaNhfwJDtRkQdpCNkvt73xjNxEE0aYM1xtWcAAG4=; h=From:To:CC:Subject:Date:Message-ID:X-Mailer:In-Reply-To: References:MIME-Version:Content-Transfer-Encoding:Content-Type: X-Originating-IP:X-ClientProxiedBy; b=KgHY+WCzSuTL3LQY2HNZmm5TBQDesIVkub6Addokkky/l1mBaQbaXmM7tZhsLddEO KYPrzXvMGdSicoPtetOG89VMZ58/WaIhYp/nvZ3s6YICKO/l1+cwQ6StOV0FEAtA37 ZGLTGP0z5fjWUqbRlO2SHlOM28XcvobDgSryk9CulCb+al6RHpWrx34Q50Xu5nQcqH bIO8Cl1Ifr4TEI6XPYfA3Bp1l4b0nib4+8p4I5SbtfKmTUgSV1kYApZT9woOfOOwGz yUYpowDLp1EmnsJmG7poTwgN4g5ZlNWVqgA3ORkqJwHCOiMYXon40ynuAdCqfUPAAU pglqqh0T9P0hw== Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Currently, ethtool does not expose how many lanes are used when the link is up. After adding a possibility to advertise or force a specific number of lanes, the lanes in use value can be either the maximum width of the port or below. Extend ethtool to expose the number of lanes currently in use for drivers that support it. For example: $ ethtool -s swp1 speed 100000 lanes 4 $ ethtool -s swp2 speed 100000 lanes 4 $ ip link set swp1 up $ ip link set swp2 up $ ethtool swp1 Settings for swp1: Supported ports: [ FIBRE Backplane ] Supported link modes: 1000baseT/Full 10000baseT/Full 1000baseKX/Full 10000baseKR/Full 10000baseR_FEC 40000baseKR4/Full 40000baseCR4/Full 40000baseSR4/Full 40000baseLR4/Full 25000baseCR/Full 25000baseKR/Full 25000baseSR/Full 50000baseCR2/Full 50000baseKR2/Full 100000baseKR4/Full 100000baseSR4/Full 100000baseCR4/Full 100000baseLR4_ER4/Full 50000baseSR2/Full 10000baseCR/Full 10000baseSR/Full 10000baseLR/Full 10000baseER/Full 50000baseKR/Full 50000baseSR/Full 50000baseCR/Full 50000baseLR_ER_FR/Full 50000baseDR/Full 100000baseKR2/Full 100000baseSR2/Full 100000baseCR2/Full 100000baseLR2_ER2_FR2/Full 100000baseDR2/Full 200000baseKR4/Full 200000baseSR4/Full 200000baseLR4_ER4_FR4/Full 200000baseDR4/Full 200000baseCR4/Full Supported pause frame use: Symmetric Receive-only Supports auto-negotiation: Yes Supported FEC modes: Not reported Advertised link modes: 1000baseT/Full 10000baseT/Full 1000baseKX/Full 1000baseKX/Full 10000baseKR/Full 10000baseR_FEC 40000baseKR4/Full 40000baseCR4/Full 40000baseSR4/Full 40000baseLR4/Full 25000baseCR/Full 25000baseKR/Full 25000baseSR/Full 50000baseCR2/Full 50000baseKR2/Full 100000baseKR4/Full 100000baseSR4/Full 100000baseCR4/Full 100000baseLR4_ER4/Full 50000baseSR2/Full 10000baseCR/Full 10000baseSR/Full 10000baseLR/Full 10000baseER/Full 200000baseKR4/Full 200000baseSR4/Full 200000baseLR4_ER4_FR4/Full 200000baseDR4/Full 200000baseCR4/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Advertised link modes: 100000baseKR4/Full 100000baseSR4/Full 100000baseCR4/Full 100000baseLR4_ER4/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Advertised FEC modes: Not reported Speed: 100000Mb/s Lanes: 4 Duplex: Full Auto-negotiation: on Port: Direct Attach Copper PHYAD: 0 Transceiver: internal Link detected: yes Signed-off-by: Danielle Ratson --- Notes: v3: * Change the condition for supporting the lanes parameter. v2: * Reword commit message. * Since now we get a link mode from driver, instead of each parameter separately, simply derive lanes from it. net/ethtool/linkmodes.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/net/ethtool/linkmodes.c b/net/ethtool/linkmodes.c index caf9111c5270..0c18f8eda63d 100644 --- a/net/ethtool/linkmodes.c +++ b/net/ethtool/linkmodes.c @@ -45,6 +45,9 @@ static int linkmodes_prepare_data(const struct ethnl_req_info *req_base, goto out; } + if (!dev->ethtool_ops->cap_link_lanes_supported) + data->ksettings.lanes = ETHTOOL_LANES_UNKNOWN; + data->peer_empty = bitmap_empty(data->ksettings.link_modes.lp_advertising, __ETHTOOL_LINK_MODE_MASK_NBITS); @@ -65,6 +68,7 @@ static int linkmodes_reply_size(const struct ethnl_req_info *req_base, len = nla_total_size(sizeof(u8)) /* LINKMODES_AUTONEG */ + nla_total_size(sizeof(u32)) /* LINKMODES_SPEED */ + + nla_total_size(sizeof(u32)) /* LINKMODES_LANES */ + nla_total_size(sizeof(u8)) /* LINKMODES_DUPLEX */ + 0; ret = ethnl_bitset_size(ksettings->link_modes.advertising, @@ -122,6 +126,7 @@ static int linkmodes_fill_reply(struct sk_buff *skb, } if (nla_put_u32(skb, ETHTOOL_A_LINKMODES_SPEED, lsettings->speed) || + nla_put_u32(skb, ETHTOOL_A_LINKMODES_LANES, ksettings->lanes) || nla_put_u8(skb, ETHTOOL_A_LINKMODES_DUPLEX, lsettings->duplex)) return -EMSGSIZE;