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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5F297C433F5 for ; Fri, 29 Oct 2021 05:24:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 441396108F for ; Fri, 29 Oct 2021 05:24:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231940AbhJ2F0z (ORCPT ); Fri, 29 Oct 2021 01:26:55 -0400 Received: from esa.microchip.iphmx.com ([68.232.154.123]:26423 "EHLO esa.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231860AbhJ2F0v (ORCPT ); Fri, 29 Oct 2021 01:26:51 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1635485063; x=1667021063; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=dUJwYyrBnhPvbLG5UOOFyUnvs9mK5GKXzIPJLO0+BtY=; b=E3fWhg4+fPaKxPdo6PIlVUqTK93JobIhxRr9cOJH5qJwV/hxuUrPX9Rk AxK7qqWepQv22spdwCXZUID6+B8zhi0E2y85bsReoZ6ysg/W+XYNCjty6 oeqwMiqPpMXRJ6SljQ7by9YH6GYtNpgGNymAndS8QdVcIykSZysssLXQm oHeE+agVVA9iHfV+LY1wWMFuJX4fhImgtOfFYtzIXth8nuy08kxeOVQtL ExbjnSZCyQnjwXtAb4Un/p6zp2Ayl4mbRcIiYJPnASUQM6LrTIobj6RpR A/V8xr4iGMjUvT5I+22UPGM4ttTWMBX0s5oREpHGdzB+NXeVmE+GCFeWw g==; IronPort-SDR: rjYkt/cr9t4A3xIVl0bjJIQ1vLHb8ZjqvJt/sfKAGtRtI5nC6bZ45L01RkRXdOtuHkTKoqnWxG 1Tiv1WAbu+UPo7g+NKIfi/CAFpR30PS24zuYfS4rPC5KslIMpbX53rDMOmiE5ZAwrIBQZd9YT7 Qp6QlUesVcGeyZevbXh5McepxfCQVWz78i1HAJn8A7jUvDnTLDcdXsGflI7tNwCXBJg1dAphdn WSPpCfJsDrDIKcrXY6FqfoRF+gRCtRJ89pETbzZew10Q4plI4F2+soDidAnPgT1UcjAPRbme5Y PMXvemO/zMOTqoFspc5OS1Mk X-IronPort-AV: E=Sophos;i="5.87,191,1631602800"; d="scan'208";a="74669138" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 28 Oct 2021 22:24:22 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.14; Thu, 28 Oct 2021 22:24:22 -0700 Received: from CHE-LT-I21427LX.microchip.com (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2176.14 via Frontend Transport; Thu, 28 Oct 2021 22:24:13 -0700 From: Prasanna Vengateshan To: , , , CC: , , , , , , , , , Subject: [PATCH v6 net-next 08/10] net: dsa: microchip: add support for port mirror operations Date: Fri, 29 Oct 2021 10:52:54 +0530 Message-ID: <20211029052256.144739-9-prasanna.vengateshan@microchip.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20211029052256.144739-1-prasanna.vengateshan@microchip.com> References: <20211029052256.144739-1-prasanna.vengateshan@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain 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 --- drivers/net/dsa/microchip/lan937x_main.c | 84 ++++++++++++++++++++++++ 1 file changed, 84 insertions(+) diff --git a/drivers/net/dsa/microchip/lan937x_main.c b/drivers/net/dsa/microchip/lan937x_main.c index 0976a95851c0..ebc50cdc4a2d 100644 --- a/drivers/net/dsa/microchip/lan937x_main.c +++ b/drivers/net/dsa/microchip/lan937x_main.c @@ -125,6 +125,88 @@ 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 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) { + dev_err(dev->dev, + "Delete existing rules towards %s & try\n", + dsa_to_port(ds, p)->name); + 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; @@ -448,6 +530,8 @@ 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_validate = lan937x_phylink_validate, -- 2.27.0