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From:   Horatiu Vultur <horatiu.vultur@microchip.com>
To:     <roopa@cumulusnetworks.com>, <nikolay@cumulusnetworks.com>,
        <davem@davemloft.net>, <UNGLinuxDriver@microchip.com>,
        <alexandre.belloni@bootlin.com>, <allan.nielsen@microchip.com>,
        <andrew@lunn.ch>, <f.fainelli@gmail.com>, <netdev@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <bridge@lists.linux-foundation.org>
CC:     Horatiu Vultur <horatiu.vultur@microchip.com>
Subject: [PATCH v2 3/3] net: mscc: Implement promisc mode.
Date:   Mon, 26 Aug 2019 10:11:15 +0200
Message-ID: <1566807075-775-4-git-send-email-horatiu.vultur@microchip.com>
In-Reply-To: <1566807075-775-1-git-send-email-horatiu.vultur@microchip.com>
References: <1566807075-775-1-git-send-email-horatiu.vultur@microchip.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Before when a port was added to a bridge then the port was added in
promisc mode. But because of the patches:
commit e6300374f3be6 ("net: Add NETIF_HW_BR_CAP feature")
commit 764866d46cc81 ("net: mscc: Use NETIF_F_HW_BR_CAP")'

The port is not needed to be in promisc mode to be part of the bridge.
So it is possible to togle the promisc mode of the port even if it is or
not part of the bridge.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 drivers/net/ethernet/mscc/ocelot.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 7d7c94b..8a18eef 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -691,6 +691,25 @@ static void ocelot_set_rx_mode(struct net_device *dev)
 	__dev_mc_sync(dev, ocelot_mc_sync, ocelot_mc_unsync);
 }
 
+static void ocelot_change_rx_flags(struct net_device *dev, int flags)
+{
+	struct ocelot_port *port = netdev_priv(dev);
+	struct ocelot *ocelot = port->ocelot;
+	u32 val;
+
+	if (!(flags & IFF_PROMISC))
+		return;
+
+	val = ocelot_read_gix(ocelot, ANA_PORT_CPU_FWD_CFG,
+			      port->chip_port);
+	if (dev->flags & IFF_PROMISC)
+		val |= ANA_PORT_CPU_FWD_CFG_CPU_SRC_COPY_ENA;
+	else
+		val &= ~(ANA_PORT_CPU_FWD_CFG_CPU_SRC_COPY_ENA);
+
+	ocelot_write_gix(ocelot, val, ANA_PORT_CPU_FWD_CFG, port->chip_port);
+}
+
 static int ocelot_port_get_phys_port_name(struct net_device *dev,
 					  char *buf, size_t len)
 {
@@ -1070,6 +1089,7 @@ static const struct net_device_ops ocelot_port_netdev_ops = {
 	.ndo_stop			= ocelot_port_stop,
 	.ndo_start_xmit			= ocelot_port_xmit,
 	.ndo_set_rx_mode		= ocelot_set_rx_mode,
+	.ndo_change_rx_flags		= ocelot_change_rx_flags,
 	.ndo_get_phys_port_name		= ocelot_port_get_phys_port_name,
 	.ndo_set_mac_address		= ocelot_port_set_mac_address,
 	.ndo_get_stats64		= ocelot_get_stats64,
-- 
2.7.4