From patchwork Thu Feb 25 01:09:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Florian Fainelli X-Patchwork-Id: 387651 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=-15.7 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 1FD00C43381 for ; Thu, 25 Feb 2021 01:11:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D865A64EF1 for ; Thu, 25 Feb 2021 01:11:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236652AbhBYBL1 (ORCPT ); Wed, 24 Feb 2021 20:11:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236574AbhBYBLN (ORCPT ); Wed, 24 Feb 2021 20:11:13 -0500 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D64E3C061788; Wed, 24 Feb 2021 17:10:32 -0800 (PST) Received: by mail-pg1-x52d.google.com with SMTP id t26so2706678pgv.3; Wed, 24 Feb 2021 17:10:32 -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:in-reply-to:references :mime-version:content-transfer-encoding; bh=qn8SZDJKXCoDJ6V5gGIw/cUX0UQvy0+2ld8Bo3gRLP0=; b=Igj+3CU8JKTay3BIHvRxiOVu51wtUDXdMSMeItN/gDX1BCayADsPQJpnWUlbQc2Yp+ P+2t15L7qaLpFqI/St7K0nrP6a2qEnA1h4n4ppEmWvtHF3p20Iu7mB3nRn2PfFgDpK+t tQ0n6z+0cAJLdY6ktxC/F4EOJsRkNbo2BNkaQIWwy+x5qAdiaWT5Drpi2ttXmFEhIgaN WMIx//D5tOrudOL8WvaGctVSk+dHYIaCCtB51tfWj5GOSk+YxTuQZbYDx2HDTdXLIXD7 34+b5MulPaGZzwgem7mYNJ53z/4+zu3R3qVE7KFZdmFoIbWLmQh+RO3PwfAtA/Wl7Pff pd6Q== 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=qn8SZDJKXCoDJ6V5gGIw/cUX0UQvy0+2ld8Bo3gRLP0=; b=qisDn93m0vPmJbNj8ECI2DtUCZvA42STgMpqorNYfkAlhn9aP/GMDpwSW23wsLixbB odwkyS02j+plm8oljI8Jw8moFIroFZMkgr1Y0F9tpVfo+Dz5BqrarkVBYRHjO5ZcynAg F4YMuc9z4LtZB4DfntzYnhbm0UAFFY2rYFHrd72K396ilkvkaRs+sUTe9QVFAOw9FNCE Xqp6rSgjdogpch+R459NYKvzIvd/sg22zJGvW2HaA976sNgGfN7KzMuNJipxXcDJA/Hz ggcavHDod/BNi5m6jZbdktNOVMLEfBCf9nf0ShEv+jywHtl0+6mEiHwrKKAQvZ8mZaGy MQRA== X-Gm-Message-State: AOAM531ul9nNiIzed6S2M9ILHQKsJw+mwbcFBiNx5PQ0mH1zdSmhkNO9 uL4wjo1KF79h3o+iwOJXlXFXjfix+Tg= X-Google-Smtp-Source: ABdhPJxy0CaISeM6CdrjriR2tHCcggBizb4CjlXhhHZhSveKdo8zbTNxIL9ffKugLohJkeQjMfUzMg== X-Received: by 2002:a63:2bc4:: with SMTP id r187mr588323pgr.131.1614215431851; Wed, 24 Feb 2021 17:10:31 -0800 (PST) Received: from stbirv-lnx-3.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id z11sm3503010pgk.65.2021.02.24.17.10.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 24 Feb 2021 17:10:31 -0800 (PST) From: Florian Fainelli To: netdev@vger.kernel.org Cc: Florian Fainelli , Andrew Lunn , Vivien Didelot , "David S. Miller" , linux-kernel@vger.kernel.org (open list), stable@vger.kernel.org, gregkh@linuxfoundation.org, olteanv@gmail.com, sashal@kernel.org Subject: [PATCH stable-5.8.y] net: dsa: b53: Correct learning for standalone ports Date: Wed, 24 Feb 2021 17:09:53 -0800 Message-Id: <20210225010956.946545-5-f.fainelli@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210225010956.946545-1-f.fainelli@gmail.com> References: <20210225010853.946338-1-f.fainelli@gmail.com> <20210225010956.946545-1-f.fainelli@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@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 | 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 86869337223a..5559dec0fbca 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -512,6 +512,19 @@ 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; @@ -525,6 +538,7 @@ 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); @@ -658,6 +672,7 @@ 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) @@ -1797,6 +1812,8 @@ 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); @@ -1844,6 +1861,7 @@ 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 946e41f020a5..4d8f0c9c4d97 100644 --- a/drivers/net/dsa/bcm_sf2.c +++ b/drivers/net/dsa/bcm_sf2.c @@ -172,23 +172,10 @@ 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 */