From patchwork Wed Mar 17 00:35:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 12144381 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=-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=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 6F17EC433E9 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 4596064F9B for ; Wed, 17 Mar 2021 00:37:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230037AbhCQAge (ORCPT ); Tue, 16 Mar 2021 20:36:34 -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 S229877AbhCQAf7 (ORCPT ); Tue, 16 Mar 2021 20:35:59 -0400 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C8EA8C061762; Tue, 16 Mar 2021 17:35:59 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id c17so6400018pfv.12; Tue, 16 Mar 2021 17:35:59 -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=+QAzmdz2J3myHOyB8tlALQV+gjhvFNmvosUKr/OQ9fw=; b=gW2OGB6PbKlM7xt6W4OIp4mG6QIYwUlZLzQE1kraE6HVRP8/l1gK9OCL6GdJwu2jSI eT/h5kLd3Gs7AXl1fdRIa7RUWQ0v+6iV4rrtv9kt8kzYGtG5jBO6NMGuzj1MxaE1yFj+ YD3Z2wAkgdRwYLLsBxVslFKenymCoAAiPEsAKkdPvfv58ahimnSfP5jAquvOohNHGVNQ 3RY5yrU7dF4ZgYVJJpEL15svPenn0tpAXD1+N4VKF3BUg4uW1UAs0fY1pCNadAS2ZwoM fB2KpO7xT9smCyg62JVQibDFie8tD4ppq9SGjFBWhtggjY2FOyRyaazfuISNKJ3QsIwA ygaw== 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=+QAzmdz2J3myHOyB8tlALQV+gjhvFNmvosUKr/OQ9fw=; b=OzLK2mw6esGe4q7Hp2ansC9PC/QTZoQtFQQdgKeahayAlyGe1a8BhWF2m2eHVnAL8h LaavkWFFl0Wd143g1RMZjFAk5c85qLLoBA20VFF6rKWDa992ccGbGZzZWIn9ZqPCwH/u A0lVkS5VL3CTr5nbEOWP5RHYLynGhA++fYYzocJU5p0CKt69TtQadJKZMONXEiwPHOV7 q/C1u+VxQ/MB75IqbjSM0wKjFluo2iQSiDJ3siOZRtLD7xpKIR8gLiC1TQoOQtxu8CEN vQcYjpwFZZ+T0TlFwmtNBkYu+WeqitJ1CSOBF6zx0ePLJb4ujp1fjp8M+D1vL27y6uxf PV1A== X-Gm-Message-State: AOAM531iP/kPiGwKOgJEWx/r8+Jiz4Lb6G5uztpD2T9ldMWDeFopGhZt p7n5GnmsKeCrbXtT6ydXMrKYly/OlHE= X-Google-Smtp-Source: ABdhPJzL6E3KKO10jvhVD05f8r6U6PdabinnP4QTKZDMjUUvlQXOfD5Sz2MjMkrq6K9JHsphRm5OFA== X-Received: by 2002:a63:4709:: with SMTP id u9mr334008pga.250.1615941358997; Tue, 16 Mar 2021 17:35:58 -0700 (PDT) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id k63sm18796512pfd.48.2021.03.16.17.35.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 17:35:58 -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 5.10] net: dsa: b53: Correct learning for standalone ports Date: Tue, 16 Mar 2021 17:35:48 -0700 Message-Id: <20210317003549.3964522-6-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 X-Patchwork-Delegate: kuba@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 | 15 +-------------- 3 files changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index 95c7fa171e35..f504b6858ed2 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -510,6 +510,19 @@ 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; @@ -523,6 +536,7 @@ int b53_enable_port(struct dsa_switch *ds, int port, struct phy_device *phy) cpu_port = dsa_to_port(ds, 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); @@ -656,6 +670,7 @@ 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) @@ -1839,6 +1854,8 @@ 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); @@ -1886,6 +1903,7 @@ 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 445226720ff2..edb0a1027b38 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -222,23 +222,10 @@ 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)) { + if (priv->brcm_tag_mask & BIT(port)) b53_brcm_hdr_setup(ds, port); - /* Disable learning on ASP port */ - if (port == 7) { - reg = core_readl(priv, CORE_DIS_LEARN); - reg |= BIT(port); - core_writel(priv, reg, CORE_DIS_LEARN); - } - } - /* Configure Traffic Class to QoS mapping, allow each priority to map * to a different queue number */