From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 BB189C433FE for ; Fri, 4 Dec 2020 10:30:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7807322A85 for ; Fri, 4 Dec 2020 10:30:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726330AbgLDKaj (ORCPT ); Fri, 4 Dec 2020 05:30:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726014AbgLDKaj (ORCPT ); Fri, 4 Dec 2020 05:30:39 -0500 Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0C5E8C0613D1; Fri, 4 Dec 2020 02:29:59 -0800 (PST) Received: by mail-lj1-x242.google.com with SMTP id s9so5985930ljo.11; Fri, 04 Dec 2020 02:29:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=So8nR/+TGOHKI8YuGPoCpAuJbgXY1+7Z6aKdtfAcFRs=; b=aJR/VMmcsWYVZOQD4ndCpzEUaMvKQnZGCRIe/JmGPbpOmT3hVOVYoy8Kp4NLuwG1/X oYIM8zSHpYPvyRC3n9QJFIbxj74IrvZACRHpIs65+ms63Ce6UJVvgZee45AB1ybyTFFC puD3GSKvXm1+UcZ+e5TL9AwmPMpJz8Cwz0/jOL3cbmeEU4choM1EEl041tJs/i2/TjJW 3Qcn+zTid6JC0bEz7LRa62Jt2EnlX4aekHk/ntoFLGd1hYGWAi1iks2nXJUWMxewtAmA o5LDAjOYjZn2HK3IsUn4p1nYiVIAx5aNvPeVlZgClge2Z2aa0laim+B/QlXZDtJodvsS Ms4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=So8nR/+TGOHKI8YuGPoCpAuJbgXY1+7Z6aKdtfAcFRs=; b=rPFDboyi2121x81fpqaoulgmuIcfvDqrckuSXGTSh1h59Riezr82GgAs0CQh+mp458 IFmypOt+lPGnA3HEEzBVEKY7MDUVDyt+LOFn8MYKhVFJwlBc17bLcDIHichAEdf3fK9+ 2PX/qchpjvhx8Zq5/ef9tTTLkN5QrCCMcqyB6S05NvFVGtiLtKhKyj6useyMERFQCYXW zBF8LJXatPmsiVzwAv8jogKj5nyfv93PXotPEUYK6Ak0QYX6tNxvF4OwSP3PJis2ZjGO S/3XUoMxTuHrgvelPFrz3pRY9izhWEzrgC3LBHEAncW4030Mf5XurDjvtYfr6gXtBVx3 R+4A== X-Gm-Message-State: AOAM5308oNbIAE3tWwvDQ0H7VWGmltT0WphmnEBCbtQ+hAxemB56v9eT VimCdr2CKQht59z9T0r1TRc= X-Google-Smtp-Source: ABdhPJwCkpGmh1eFASP0RSM302qX2ny3ITLPlqR8xshLeF7KBQx5UWSO2wPReK01NvP9zJCD4pYJwQ== X-Received: by 2002:a2e:9718:: with SMTP id r24mr3253682lji.20.1607077797549; Fri, 04 Dec 2020 02:29:57 -0800 (PST) Received: from localhost.localdomain (87-205-71-93.adsl.inetia.pl. [87.205.71.93]) by smtp.gmail.com with ESMTPSA id d9sm62738lfj.228.2020.12.04.02.29.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Dec 2020 02:29:56 -0800 (PST) From: alardam@gmail.com X-Google-Original-From: marekx.majtyka@intel.com To: magnus.karlsson@intel.com, bjorn.topel@intel.com, andrii.nakryiko@gmail.com, kuba@kernel.org, ast@kernel.org, daniel@iogearbox.net, netdev@vger.kernel.org, davem@davemloft.net, john.fastabend@gmail.com, hawk@kernel.org, toke@redhat.com Cc: maciej.fijalkowski@intel.com, jonathan.lemon@gmail.com, bpf@vger.kernel.org, jeffrey.t.kirsher@intel.com, maciejromanfijalkowski@gmail.com, intel-wired-lan@lists.osuosl.org, Marek Majtyka Subject: [PATCH v2 bpf 0/5] New netdev feature flags for XDP Date: Fri, 4 Dec 2020 11:28:56 +0100 Message-Id: <20201204102901.109709-1-marekx.majtyka@intel.com> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org From: Marek Majtyka Implement support for checking if a netdev has native XDP and AF_XDP zero copy support. Previously, there was no way to do this other than to try to create an AF_XDP socket on the interface or load an XDP program and see if it worked. This commit changes this by extending existing netdev_features in the following way: * xdp - full XDP support (XDP_{TX, PASS, DROP, ABORT, REDIRECT}) * af-xdp-zc - AF_XDP zero copy support NICs supporting these features are updated by turning the corresponding netdev feature flags on. NOTE: Only the compilation check was performed for: - ice, - igb, - mlx5, - mlx4. - bnxt, - dpaa2, - mvmeta, - mvpp2, - qede, - sfc, - netsec, - cpsw, - xen, - netronome - ena - virtio_net. Libbpf library is extended in order to provide a simple API for gathering information about XDP supported capabilities of a netdev. This API utilizes netlink interface towards kernel. With this function it is possible to get xsk supported options for netdev beforehand. The new API is used in core xsk code as well as in the xdpsock sample. These new flags also solve the problem with strict recognition of zero copy support. The problem is that there are drivers out there that only support XDP partially, so it is possible to successfully load the XDP program in native mode, but it will still not be able to support zero-copy as it does not have XDP_REDIRECT support. With af-xdp-zc flag the check is possible and trivial. Changes since v1: * Replace netdev_feature flags variable with a bitmap of XDP-specific properties. New kernel and uapi interfaces are added to handle access to the XDP netdev properties bitmap. [Toke] * Set more fine grained XPD properties for netdevs when necessary. [Toke] * Extend ethtool netlink interface in order to get access to the XDP bitmap (XDP_PROPERTIES_GET). [Toke] * Removed the libbpf patches for now. --- Marek Majtyka (5): net: ethtool: add xdp properties flag set drivers/net: turn XDP properties on xsk: add usage of xdp properties flags xsk: add check for full support of XDP in bind ethtool: provide xdp info with XDP_PROPERTIES_GET .../networking/netdev-xdp-properties.rst | 42 ++++++++ drivers/net/ethernet/amazon/ena/ena_netdev.c | 2 + drivers/net/ethernet/broadcom/bnxt/bnxt.c | 1 + .../net/ethernet/freescale/dpaa2/dpaa2-eth.c | 1 + drivers/net/ethernet/intel/i40e/i40e_main.c | 3 + drivers/net/ethernet/intel/ice/ice_main.c | 4 + drivers/net/ethernet/intel/igb/igb_main.c | 2 + drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 3 + drivers/net/ethernet/marvell/mvneta.c | 3 + .../net/ethernet/marvell/mvpp2/mvpp2_main.c | 3 + .../net/ethernet/mellanox/mlx4/en_netdev.c | 2 + .../net/ethernet/mellanox/mlx5/core/en_main.c | 3 + .../ethernet/netronome/nfp/nfp_net_common.c | 5 + drivers/net/ethernet/qlogic/qede/qede_main.c | 2 + drivers/net/ethernet/sfc/efx.c | 2 + drivers/net/ethernet/socionext/netsec.c | 2 + drivers/net/ethernet/ti/cpsw.c | 3 + drivers/net/ethernet/ti/cpsw_new.c | 2 + drivers/net/tun.c | 4 + drivers/net/veth.c | 2 + drivers/net/virtio_net.c | 2 + drivers/net/xen-netfront.c | 2 + include/linux/netdevice.h | 2 + include/linux/xdp_properties.h | 53 +++++++++++ include/net/xdp.h | 95 +++++++++++++++++++ include/net/xdp_sock_drv.h | 10 ++ include/uapi/linux/ethtool.h | 1 + include/uapi/linux/ethtool_netlink.h | 14 +++ include/uapi/linux/if_xdp.h | 1 + include/uapi/linux/xdp_properties.h | 32 +++++++ net/ethtool/Makefile | 2 +- net/ethtool/common.c | 11 +++ net/ethtool/common.h | 4 + net/ethtool/netlink.c | 38 +++++--- net/ethtool/netlink.h | 2 + net/ethtool/strset.c | 5 + net/ethtool/xdp.c | 76 +++++++++++++++ net/xdp/xsk.c | 4 +- net/xdp/xsk_buff_pool.c | 20 +++- tools/include/uapi/linux/if_xdp.h | 1 + tools/lib/bpf/xsk.c | 3 + 41 files changed, 449 insertions(+), 20 deletions(-) create mode 100644 Documentation/networking/netdev-xdp-properties.rst create mode 100644 include/linux/xdp_properties.h create mode 100644 include/uapi/linux/xdp_properties.h create mode 100644 net/ethtool/xdp.c base-commit: eceae70bdeaeb6b8ceb662983cf663ff352fbc96 -- 2.27.0