From patchwork Fri Mar 25 16:53:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prasanna Vengateshan X-Patchwork-Id: 554495 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75C6EC433F5 for ; Fri, 25 Mar 2022 16:55:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349625AbiCYQ4x (ORCPT ); Fri, 25 Mar 2022 12:56:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377081AbiCYQ4a (ORCPT ); Fri, 25 Mar 2022 12:56:30 -0400 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 890DAE615E; Fri, 25 Mar 2022 09:54:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1648227284; x=1679763284; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MVoKun0f6EUeOWvz5e2xJ3Ag+ZUi3FPzc4l1bOHwOSA=; b=bvAbG3l60P9atn5M72oTAah8bxJi5gBJMnw1liD8edczaWAH2DOD5m5s kv4lq9IBP8YS/66Vy4WA1V275VnVrzpXT5ejpFkHNIQ02qe2Y6W4GoK7+ RwnucIegXxu+qMc1nn7EcyXO6ebCF+ThYoKX+sKSX1eQByDWyJ1PEeLig gkzobvfCt6RARy8LXokl287YN1gPLaQZJqwKcbjLCa/ENGLGxbsh69XXp ZiyboFD2caduADYViFXwtnV73siejx5914/UtjJPT5Yuf4UZhhKcFJriy 3gSNxH8Hrc+zfrR4VGVqySqwzX/O4PgAngOgJFX+X+WlSF0LrGw+zPIJQ g==; X-IronPort-AV: E=Sophos;i="5.90,209,1643698800"; d="scan'208";a="167146027" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa1.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 25 Mar 2022 09:54:43 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Fri, 25 Mar 2022 09:54:42 -0700 Received: from CHE-LT-I21427LX.microchip.com (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2375.17 via Frontend Transport; Fri, 25 Mar 2022 09:54:36 -0700 From: Prasanna Vengateshan To: , , , CC: , , , , , , , , , , Subject: [RFC PATCH v11 net-next 08/10] net: dsa: microchip: add support for port mirror operations Date: Fri, 25 Mar 2022 22:23:39 +0530 Message-ID: <20220325165341.791013-9-prasanna.vengateshan@microchip.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220325165341.791013-1-prasanna.vengateshan@microchip.com> References: <20220325165341.791013-1-prasanna.vengateshan@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Added support for port_mirror_add() and port_mirror_del operations Sniffing is limited to one port & alert the user if any new sniffing port is selected Signed-off-by: Prasanna Vengateshan Reviewed-by: Vladimir Oltean Reviewed-by: Florian Fainelli --- drivers/net/dsa/microchip/lan937x_main.c | 83 ++++++++++++++++++++++++ 1 file changed, 83 insertions(+) diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c index 51640234dda6..504b9a4edea2 100644 --- a/drivers/net/dsa/microchip/lan937x_main.c +++ b/drivers/net/dsa/microchip/lan937x_main.c @@ -98,6 +98,87 @@ static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port, ksz_update_port_member(dev, port); } +static int lan937x_port_mirror_add(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror, + bool ingress, struct netlink_ext_ack *extack) +{ + struct ksz_device *dev = ds->priv; + int ret, p; + u8 data; + + /* Limit to one sniffer port + * Check if any of the port is already set for sniffing + * If yes, instruct the user to remove the previous entry & exit + */ + for (p = 0; p < dev->port_cnt; p++) { + /* Skip the current sniffing port */ + if (p == mirror->to_local_port) + continue; + + ret = lan937x_pread8(dev, p, P_MIRROR_CTRL, &data); + if (ret < 0) + return ret; + + if (data & PORT_MIRROR_SNIFFER) { + NL_SET_ERR_MSG_MOD(extack, + "Sniffer port is already configured, delete existing rules & retry"); + return -EBUSY; + } + } + + /* Configure ingress/egress mirroring */ + if (ingress) + ret = lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, + true); + else + ret = lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, + true); + if (ret < 0) + return ret; + + /* Configure sniffer port as other ports do not have + * PORT_MIRROR_SNIFFER is set + */ + ret = lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL, + PORT_MIRROR_SNIFFER, true); + if (ret < 0) + return ret; + + return lan937x_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false); +} + +static void lan937x_port_mirror_del(struct dsa_switch *ds, int port, + struct dsa_mall_mirror_tc_entry *mirror) +{ + struct ksz_device *dev = ds->priv; + bool in_use = false; + u8 data; + int p; + + /* clear ingress/egress mirroring port */ + if (mirror->ingress) + lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_RX, + false); + else + lan937x_port_cfg(dev, port, P_MIRROR_CTRL, PORT_MIRROR_TX, + false); + + /* Check if any of the port is still referring to sniffer port */ + for (p = 0; p < dev->port_cnt; p++) { + lan937x_pread8(dev, p, P_MIRROR_CTRL, &data); + + if ((data & (PORT_MIRROR_RX | PORT_MIRROR_TX))) { + in_use = true; + break; + } + } + + /* delete sniffing if there are no other mirroring rule exist */ + if (!in_use) + lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL, + PORT_MIRROR_SNIFFER, false); +} + static void lan937x_config_cpu_port(struct dsa_switch *ds) { struct ksz_device *dev = ds->priv; @@ -485,6 +566,8 @@ const struct dsa_switch_ops lan937x_switch_ops = { .port_bridge_leave = ksz_port_bridge_leave, .port_stp_state_set = lan937x_port_stp_state_set, .port_fast_age = ksz_port_fast_age, + .port_mirror_add = lan937x_port_mirror_add, + .port_mirror_del = lan937x_port_mirror_del, .port_max_mtu = lan937x_get_max_mtu, .port_change_mtu = lan937x_change_mtu, .phylink_get_caps = lan937x_phylink_get_caps,