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=-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 0C204C4361B for ; Wed, 17 Mar 2021 00:37:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C45A064FCF for ; Wed, 17 Mar 2021 00:37:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229986AbhCQAgc (ORCPT ); Tue, 16 Mar 2021 20:36:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229673AbhCQAf5 (ORCPT ); Tue, 16 Mar 2021 20:35:57 -0400 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 528E6C061762; Tue, 16 Mar 2021 17:35:57 -0700 (PDT) Received: by mail-pj1-x1030.google.com with SMTP id kr3-20020a17090b4903b02900c096fc01deso379458pjb.4; Tue, 16 Mar 2021 17:35:57 -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=W5XSGEch+BExuGKBr4lniyKuRe4W+F14wv8bY0zf9vw=; b=o49xPUcycAdIU3UZTR9C0V5NHty4BrllDRb41RpwR1XRxj25mRhE+OA1GRZG0bQVuP DrYf+VS5U0LEBIit0AEQt6nOeOdVKURwDUhe7Upfx+qDocg+mCkmLtKqAuxHV2Fj8Iqm IwqwCO/MiJtZk6uyv7FUrBq8hm8DVpPxuAk3flJ+Y95bjJGacHGQ+H+tl5CjximSZUh1 skEboOfZdH4o4CR75a1kc5IzkNWoMytRPAYDpaQzjmIYYmwNDK1AV4PmM0LXJbiNn1aH +lUCONhp/5V4mrLJehRppsPSXox1mCAQ6/aELGyYdf0FFaJZIKVtlayOpONHCCQQXufw Nj5Q== 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=W5XSGEch+BExuGKBr4lniyKuRe4W+F14wv8bY0zf9vw=; b=SWXM5+/5wzX4LGJnHtMcOmsr9aC0GkkIZubA2VGRrxqR0uOPgKqEb63fs2mOg4ak/L t+99JEI9NNjj18wfAXH2vJJ493ewOCGOLDF4ZYEIPRmvMH2k25z9Uj+FnwKMFwAxEObb b4IoqEgnu+cMpscjcp3a4UoimDjZaeZ0HpF1hiVs9+dBswRo5yC3GAfXrlD8y3OkCeTF eKcu09qXPbAn32wIMGTWTM/gZ8kz3kpwcGqngArcYE8iemdS9hIBwDawztNV9S/ePk3d rJl9WQWkArtuco5aj6JwTPwgErICvEldEoni3mujg6XQy0fMYaIM69laxa1XYKTVOQly iOeA== X-Gm-Message-State: AOAM533kEmrD6xfGd0Qut6oVMagZUsJO0jrf5BBvipAG2DVBEjSxHU2c CICcLctIIBh/O1DdJaP4Xm3t2JfFXpQ= X-Google-Smtp-Source: ABdhPJxiNXacj538T1k4LGiJ3ZZq2WNc9ocJnstGCFlEqMZVjiL3o/jJq8OHp1XMqlfbcuWOEC2oaQ== X-Received: by 2002:a17:90a:8a0f:: with SMTP id w15mr1609270pjn.200.1615941356456; Tue, 16 Mar 2021 17:35:56 -0700 (PDT) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id k63sm18796512pfd.48.2021.03.16.17.35.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 17:35:56 -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 4.19] net: dsa: b53: Correct learning for standalone ports Date: Tue, 16 Mar 2021 17:35:46 -0700 Message-Id: <20210317003549.3964522-4-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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 | 19 +++++++++++++++++++ drivers/net/dsa/b53/b53_regs.h | 1 + drivers/net/dsa/bcm_sf2.c | 5 ----- 3 files changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 335ce1e84904..7eaeab65d39f 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -507,12 +507,27 @@ 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; unsigned int cpu_port = ds->ports[port].cpu_dp->index; u16 pvlan; + b53_port_set_learning(dev, port, false); + /* Clear the Rx and Tx disable bits and set to no spanning tree */ b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), 0); @@ -620,6 +635,7 @@ static void b53_enable_cpu_port(struct b53_device *dev, int port) b53_write8(dev, B53_CTRL_PAGE, B53_PORT_CTRL(port), port_ctrl); b53_brcm_hdr_setup(dev->ds, port); + b53_port_set_learning(dev, port, false); } static void b53_enable_mib(struct b53_device *dev) @@ -1517,6 +1533,8 @@ 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); @@ -1564,6 +1582,7 @@ 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 613f03f9d9ec..e9fe3897bd9c 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -173,11 +173,6 @@ 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); -- 2.25.1