linux-kernel - [PATCH net-next v6 8/9] net: lan966x: Extend switchdev bridge flags

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Message-ID: <20211217121017.282481-9-horatiu.vultur@microchip.com>
Date:   Fri, 17 Dec 2021 13:10:16 +0100
From:   Horatiu Vultur <horatiu.vultur@...rochip.com>
To:     <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <davem@...emloft.net>, <kuba@...nel.org>, <robh+dt@...nel.org>,
        <UNGLinuxDriver@...rochip.com>, <linux@...linux.org.uk>,
        <f.fainelli@...il.com>, <vivien.didelot@...il.com>,
        <vladimir.oltean@....com>, <andrew@...n.ch>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next v6 8/9] net: lan966x: Extend switchdev bridge flags

Currently allow a port to be part or not of the multicast flooding mask.
By implementing the switchdev calls SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS
and SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS.

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 .../microchip/lan966x/lan966x_switchdev.c     | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
index cef9e690fb82..af227b33cb3f 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.c
@@ -9,6 +9,34 @@ static struct notifier_block lan966x_netdevice_nb __read_mostly;
 static struct notifier_block lan966x_switchdev_nb __read_mostly;
 static struct notifier_block lan966x_switchdev_blocking_nb __read_mostly;
 
+static void lan966x_port_bridge_flags(struct lan966x_port *port,
+				      struct switchdev_brport_flags flags)
+{
+	u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_MC));
+
+	val = ANA_PGID_PGID_GET(val);
+
+	if (flags.mask & BR_MCAST_FLOOD) {
+		if (flags.val & BR_MCAST_FLOOD)
+			val |= BIT(port->chip_port);
+		else
+			val &= ~BIT(port->chip_port);
+	}
+
+	lan_rmw(ANA_PGID_PGID_SET(val),
+		ANA_PGID_PGID,
+		port->lan966x, ANA_PGID(PGID_MC));
+}
+
+static int lan966x_port_pre_bridge_flags(struct lan966x_port *port,
+					 struct switchdev_brport_flags flags)
+{
+	if (flags.mask & ~BR_MCAST_FLOOD)
+		return -EINVAL;
+
+	return 0;
+}
+
 static void lan966x_update_fwd_mask(struct lan966x *lan966x)
 {
 	int i;
@@ -67,6 +95,12 @@ static int lan966x_port_attr_set(struct net_device *dev, const void *ctx,
 		return 0;
 
 	switch (attr->id) {
+	case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
+		lan966x_port_bridge_flags(port, attr->u.brport_flags);
+		break;
+	case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
+		err = lan966x_port_pre_bridge_flags(port, attr->u.brport_flags);
+		break;
 	case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
 		lan966x_port_stp_state_set(port, attr->u.stp_state);
 		break;
-- 
2.33.0