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From:   Horatiu Vultur <horatiu.vultur@microchip.com>
To:     <linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>
CC:     <davem@davemloft.net>, <edumazet@google.com>, <kuba@kernel.org>,
        <pabeni@redhat.com>, <vladimir.oltean@nxp.com>,
        Horatiu Vultur <horatiu.vultur@microchip.com>
Subject: [PATCH net-next v2 6/7] net: lan966x: Extend FDB to support also lag
Date:   Mon, 27 Jun 2022 22:13:29 +0200
Message-ID: <20220627201330.45219-7-horatiu.vultur@microchip.com>
In-Reply-To: <20220627201330.45219-1-horatiu.vultur@microchip.com>
References: <20220627201330.45219-1-horatiu.vultur@microchip.com>
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Offload FDB entries when the original device is a lag interface. Because
all the ports under the lag have the same chip id, which is the chip id
of first port, then add the entries only for the first port.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 .../ethernet/microchip/lan966x/lan966x_fdb.c  | 31 +++++++++++++++++++
 .../ethernet/microchip/lan966x/lan966x_lag.c  | 16 ++++++++++
 .../ethernet/microchip/lan966x/lan966x_main.h |  7 +++++
 3 files changed, 54 insertions(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c b/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c
index 2e186e9d9893..154efbd0c319 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_fdb.c
@@ -194,6 +194,35 @@ static void lan966x_fdb_bridge_event_work(struct lan966x_fdb_event_work *fdb_wor
 	}
 }
 
+static void lan966x_fdb_lag_event_work(struct lan966x_fdb_event_work *fdb_work)
+{
+	struct switchdev_notifier_fdb_info *fdb_info;
+	struct lan966x_port *port;
+	struct lan966x *lan966x;
+
+	if (!lan966x_lag_first_port(fdb_work->orig_dev, fdb_work->dev))
+		return;
+
+	lan966x = fdb_work->lan966x;
+	port = netdev_priv(fdb_work->dev);
+	fdb_info = &fdb_work->fdb_info;
+
+	switch (fdb_work->event) {
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+		if (!fdb_info->added_by_user)
+			break;
+		lan966x_lag_mac_add_entry(lan966x, port, fdb_info->addr,
+					  fdb_info->vid);
+		break;
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+		if (!fdb_info->added_by_user)
+			break;
+		lan966x_lag_mac_del_entry(lan966x, fdb_info->addr,
+					  fdb_info->vid);
+		break;
+	}
+}
+
 static void lan966x_fdb_event_work(struct work_struct *work)
 {
 	struct lan966x_fdb_event_work *fdb_work =
@@ -203,6 +232,8 @@ static void lan966x_fdb_event_work(struct work_struct *work)
 		lan966x_fdb_port_event_work(fdb_work);
 	else if (netif_is_bridge_master(fdb_work->orig_dev))
 		lan966x_fdb_bridge_event_work(fdb_work);
+	else if (netif_is_lag_master(fdb_work->orig_dev))
+		lan966x_fdb_lag_event_work(fdb_work);
 
 	kfree(fdb_work->fdb_info.addr);
 	dev_put(fdb_work->orig_dev);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c b/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c
index 0da398e51aa3..dd372a6497bb 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_lag.c
@@ -290,3 +290,19 @@ u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond)
 
 	return mask;
 }
+
+void lan966x_lag_mac_del_entry(struct lan966x *lan966x,
+			       const unsigned char *addr,
+			       u16 vid)
+{
+	lan966x_mac_del_entry(lan966x, addr, vid);
+}
+
+int lan966x_lag_mac_add_entry(struct lan966x *lan966x,
+			      struct lan966x_port *port,
+			      const unsigned char *addr,
+			      u16 vid)
+{
+	lan966x_mac_del_entry(lan966x, addr, vid);
+	return lan966x_mac_add_entry(lan966x, port, addr, vid);
+}
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 23ddabea8d70..1d7fe0e2a243 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -425,6 +425,13 @@ int lan966x_lag_netdev_changeupper(struct net_device *dev,
 				   struct netdev_notifier_changeupper_info *info);
 bool lan966x_lag_first_port(struct net_device *lag, struct net_device *dev);
 u32 lan966x_lag_get_mask(struct lan966x *lan966x, struct net_device *bond);
+void lan966x_lag_mac_del_entry(struct lan966x *lan966x,
+			       const unsigned char *addr,
+			       u16 vid);
+int lan966x_lag_mac_add_entry(struct lan966x *lan966x,
+			      struct lan966x_port *port,
+			      const unsigned char *addr,
+			      u16 vid);
 
 int lan966x_port_changeupper(struct net_device *dev,
 			     struct net_device *brport_dev,
-- 
2.33.0