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From: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
To: <andrew@lunn.ch>, <netdev@vger.kernel.org>, <olteanv@gmail.com>,
	<robh+dt@kernel.org>
Cc: <UNGLinuxDriver@microchip.com>, <Woojung.Huh@microchip.com>,
	<hkallweit1@gmail.com>, <linux@armlinux.org.uk>,
	<davem@davemloft.net>, <kuba@kernel.org>,
	<linux-kernel@vger.kernel.org>, <vivien.didelot@gmail.com>,
	<f.fainelli@gmail.com>, <devicetree@vger.kernel.org>
Subject: [PATCH v3 net-next 08/10] net: dsa: microchip: add support for port mirror operations
Date: Fri, 23 Jul 2021 23:01:06 +0530	[thread overview]
Message-ID: <20210723173108.459770-9-prasanna.vengateshan@microchip.com> (raw)
In-Reply-To: <20210723173108.459770-1-prasanna.vengateshan@microchip.com>

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 <prasanna.vengateshan@microchip.com>
---
 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 3380a4617725..171c46f37fa4 100644
--- a/drivers/net/dsa/microchip/lan937x_main.c
+++ b/drivers/net/dsa/microchip/lan937x_main.c
@@ -129,6 +129,87 @@ static void lan937x_port_stp_state_set(struct dsa_switch *ds, int port,
 	mutex_unlock(&dev->dev_mutex);
 }
 
+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;
+
+	/* 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 meanwhile 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;
+		}
+	}
+
+	ret = lan937x_port_cfg(dev, mirror->to_local_port, P_MIRROR_CTRL,
+			       PORT_MIRROR_SNIFFER, true);
+	if (ret < 0)
+		return ret;
+
+	ret = lan937x_cfg(dev, S_MIRROR_CTRL, SW_MIRROR_RX_TX, false);
+
+	return ret;
+}
+
+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 phy_interface_t lan937x_get_interface(struct ksz_device *dev, int port)
 {
 	phy_interface_t interface;
@@ -406,6 +487,8 @@ 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


  parent reply	other threads:[~2021-07-23 17:32 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-23 17:30 [PATCH v3 net-next 00/10] net: dsa: microchip: DSA driver support for LAN937x switch Prasanna Vengateshan
2021-07-23 17:30 ` [PATCH v3 net-next 01/10] dt-bindings: net: dsa: dt bindings for microchip lan937x Prasanna Vengateshan
2021-07-26 22:49   ` Rob Herring
2021-07-23 17:31 ` [PATCH v3 net-next 02/10] net: dsa: move mib->cnt_ptr reset code to ksz_common.c Prasanna Vengateshan
2021-07-23 18:53   ` Vladimir Oltean
2021-07-23 17:31 ` [PATCH v3 net-next 03/10] net: phy: Add support for LAN937x T1 phy driver Prasanna Vengateshan
2021-08-11 17:52   ` Prasanna Vengateshan
2021-07-23 17:31 ` [PATCH v3 net-next 04/10] net: dsa: tag_ksz: add tag handling for Microchip LAN937x Prasanna Vengateshan
2021-07-23 19:23   ` Vladimir Oltean
2021-07-23 17:31 ` [PATCH v3 net-next 05/10] net: dsa: microchip: add DSA support for microchip lan937x Prasanna Vengateshan
2021-07-31 15:04   ` Vladimir Oltean
2021-07-31 22:05     ` Andrew Lunn
2021-08-02 21:33       ` Vladimir Oltean
2021-08-03 14:43         ` Andrew Lunn
2021-08-03 15:05           ` Vladimir Oltean
2021-08-02 10:45     ` Prasanna Vengateshan
2021-08-02 12:15       ` Vladimir Oltean
2021-08-02 13:13         ` Andrew Lunn
2021-08-02 13:59           ` Vladimir Oltean
2021-08-02 20:47             ` Andrew Lunn
2021-08-03 16:54             ` Prasanna Vengateshan
2021-08-03 23:54               ` Vladimir Oltean
2021-08-04  9:59                 ` Russell King (Oracle)
2021-08-04 10:46                   ` Vladimir Oltean
2021-08-04 14:28                     ` Prasanna Vengateshan
2021-08-04 14:51                       ` Vladimir Oltean
2021-08-07 15:40                     ` Andrew Lunn
2021-08-07 17:00                       ` Vladimir Oltean
2021-08-11 17:44                       ` Prasanna Vengateshan
2021-08-11 18:23                         ` Andrew Lunn
2021-08-11 20:14                           ` Russell King (Oracle)
2021-08-11 20:20                             ` Vladimir Oltean
2021-08-11 20:22                               ` Andrew Lunn
2021-07-23 17:31 ` [PATCH v3 net-next 06/10] net: dsa: microchip: add support for phylink management Prasanna Vengateshan
2021-07-31 15:27   ` Vladimir Oltean
2021-08-03 17:04     ` Prasanna Vengateshan
2021-07-23 17:31 ` [PATCH v3 net-next 07/10] net: dsa: microchip: add support for ethtool port counters Prasanna Vengateshan
2021-07-23 17:31 ` Prasanna Vengateshan [this message]
2021-07-31 15:24   ` [PATCH v3 net-next 08/10] net: dsa: microchip: add support for port mirror operations Vladimir Oltean
2021-07-23 17:31 ` [PATCH v3 net-next 09/10] net: dsa: microchip: add support for fdb and mdb management Prasanna Vengateshan
2021-07-31 15:19   ` Vladimir Oltean
2021-07-23 17:31 ` [PATCH v3 net-next 10/10] net: dsa: microchip: add support for vlan operations Prasanna Vengateshan
2021-07-31 15:08   ` Vladimir Oltean
2021-08-02 10:48     ` Prasanna Vengateshan

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