From patchwork Wed Mar 17 00:35:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 404697 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5C346C43381 for ; Wed, 17 Mar 2021 00:37:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 337BD64F91 for ; Wed, 17 Mar 2021 00:37:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230015AbhCQAgd (ORCPT ); Tue, 16 Mar 2021 20:36:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43626 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229862AbhCQAf6 (ORCPT ); Tue, 16 Mar 2021 20:35:58 -0400 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88AC7C061762; Tue, 16 Mar 2021 17:35:58 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id w34so22683264pga.8; Tue, 16 Mar 2021 17:35:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=RPlS17Li+Ps4JCfS5GMNYek0uWlfFA+sAc6YzpJh9Cw=; b=Rd6NcysyaGLigBirJO7bqgwSWnMb+8Un2nC3GacpJ88IlZ7+uTxYFf8HAnv7q7jCUi V7Lllis5qEDT/E36zGGRdcfD/siYsqT2mH7RwTu0ufYhLheHFygum6PUWfi9V5CXMdQM 5z4W7wyfSTIrybYA0I/kVmcSoo4t8KAgCC/JDCsbazSJRLHslEmZHynl3S+cOYPBCLiA 2ZmyWy+bW7lSYEI6UPQLAI0xWdlB1cCsgxnwPd1W7wz0qSwq5PHNdkXyPQDkxwPPt/Yg ZvQ4ZEB0Frssek/UF5BNcZIzQoZP7uHuBDeAoX7JDnLEeRh8BabNDXfsd9DlCZFKXGDr /JPw== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=RPlS17Li+Ps4JCfS5GMNYek0uWlfFA+sAc6YzpJh9Cw=; b=FY4h2B/R/naPZEprbkLk0NjN3ujQhwkikJDoEk8wV5WFcd94FcgwdNLOScjRU6MfMO 948mcdhaKKVRwbsjvKVuAAcWDIqVL9QpAHrVL8RF8nHxehQqAtv86Xlj6fOxGiLRFm84 riUrdi+ou3gCH72MR52rHZeqcGhqAaOd2/BTjCUddaahruTxCyKkWZPC45oYIIPlIbAQ uDT80t6+It3O2zh83R+8cx+Tq+PgSRmR+Ct/k3l19ONULuVA2EHvIyKL9UfsT9zxUG2d jlK21g0tVKpF/7oXubxX89CU/K1y8yoONxMUGi9pLso7UtolDKOmXVki6+DzfC1+lvgH QZRQ== X-Gm-Message-State: AOAM532JM0WXSRljM+GQh6vZFs3do+drcnbZ+U+DD2qiXVCpfxZZtyfk 5vi6EIHivDIy1Yx7QK2yskbeska3BGw= X-Google-Smtp-Source: ABdhPJyzUSCxTwn/QjijoF2oQvxqkkrGUaFvQxDdskInhKc2XrvV1HRrF0Jl0eHrpFEQdfMBpRtN+w== X-Received: by 2002:a63:ea51:: with SMTP id l17mr325656pgk.117.1615941357729; Tue, 16 Mar 2021 17:35:57 -0700 (PDT) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id k63sm18796512pfd.48.2021.03.16.17.35.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 17:35:57 -0700 (PDT) From: Florian Fainelli To: netdev@vger.kernel.org Cc: Florian Fainelli , Andrew Lunn , Vivien Didelot , Vladimir Oltean , "David S. Miller" , Jakub Kicinski , linux-kernel@vger.kernel.org (open list), stable@vger.kernel.org, gregkh@linuxfoundation.org, sashal@kernel.org Subject: [PATCH stable 5.4] net: dsa: b53: Correct learning for standalone ports Date: Tue, 16 Mar 2021 17:35:47 -0700 Message-Id: <20210317003549.3964522-5-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210317003549.3964522-1-f.fainelli@gmail.com> References: <20210317003549.3964522-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Standalone ports should not have learning enabled since all the frames are always copied to the CPU port. This is particularly important in case an user-facing port intentionally spoofs the CPU port's MAC address. With learning enabled we would end up with the switch having incorrectly learned the address of the CPU port which typically results in a complete break down of network connectivity until the address learned ages out and gets re-learned, from the correct port this time. There was no control of the BR_LEARNING flag until upstream commit 4098ced4680a485c5953f60ac63dff19f3fb3d42 ("Merge branch 'brport-flags'") which is why we default to enabling learning when the ports gets added as a bridge member. Fixes: 967dd82ffc52 ("net: dsa: b53: Add support for Broadcom RoboSwitch") Signed-off-by: Florian Fainelli --- drivers/net/dsa/b53/b53_common.c | 18 ++++++++++++++++++ drivers/net/dsa/b53/b53_regs.h | 1 + drivers/net/dsa/bcm_sf2.c | 5 ----- 3 files changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 0b1223f360d9..f35757b63ea7 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -514,6 +514,19 @@ void b53_imp_vlan_setup(struct dsa_switch *ds, int cpu_port) } EXPORT_SYMBOL(b53_imp_vlan_setup); +static void b53_port_set_learning(struct b53_device *dev, int port, + bool learning) +{ + u16 reg; + + b53_read16(dev, B53_CTRL_PAGE, B53_DIS_LEARNING, ®); + if (learning) + reg &= ~BIT(port); + else + reg |= BIT(port); + b53_write16(dev, B53_CTRL_PAGE, B53_DIS_LEARNING, reg); +} + int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy) { struct b53_device *dev = ds->priv; @@ -527,6 +540,7 @@ int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy) cpu_port = ds->ports[port].cpu_dp->index; b53_br_egress_floods(ds, port, true, true); + b53_port_set_learning(dev, port, false); if (dev->ops->irq_enable) ret = dev->ops->irq_enable(dev, port); @@ -645,6 +659,7 @@ static void b53_enable_cpu_port(struct b53_device *dev, int port) b53_brcm_hdr_setup(dev->ds, port); b53_br_egress_floods(dev->ds, port, true, true); + b53_port_set_learning(dev, port, false); } static void b53_enable_mib(struct b53_device *dev) @@ -1704,6 +1719,8 @@ int b53_br_join(struct dsa_switch *ds, int port, struct net_device *br) b53_write16(dev, B53_PVLAN_PAGE, B53_PVLAN_PORT_MASK(port), pvlan); dev->ports[port].vlan_ctl_mask = pvlan; + b53_port_set_learning(dev, port, true); + return 0; } EXPORT_SYMBOL(b53_br_join); @@ -1751,6 +1768,7 @@ void b53_br_leave(struct dsa_switch *ds, int port, struct net_device *br) vl->untag |= BIT(port) | BIT(cpu_port); b53_set_vlan_entry(dev, pvid, vl); } + b53_port_set_learning(dev, port, false); } EXPORT_SYMBOL(b53_br_leave); diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h index c90985c294a2..b2c539a42154 100644 --- a/drivers/net/dsa/b53/b53_regs.h +++ b/drivers/net/dsa/b53/b53_regs.h @@ -115,6 +115,7 @@ #define B53_UC_FLOOD_MASK 0x32 #define B53_MC_FLOOD_MASK 0x34 #define B53_IPMC_FLOOD_MASK 0x36 +#define B53_DIS_LEARNING 0x3c /* * Override Ports 0-7 State on devices with xMII interfaces (8 bit) diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c index 6dd29bad1609..ca425c15953b 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -172,11 +172,6 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port, reg &= ~P_TXQ_PSM_VDD(port); core_writel(priv, reg, CORE_MEM_PSM_VDD_CTRL); - /* Enable learning */ - reg = core_readl(priv, CORE_DIS_LEARN); - reg &= ~BIT(port); - core_writel(priv, reg, CORE_DIS_LEARN); - /* Enable Broadcom tags for that port if requested */ if (priv->brcm_tag_mask & BIT(port)) b53_brcm_hdr_setup(ds, port);