net: marvell: prestera: Add Switchdev driver implementation

The following features are supported:

    - VLAN-aware bridge offloading
    - VLAN-unaware bridge offloading
    - FDB offloading (learning, ageing)
    - Switchport configuration

Currently there are some limitations like:

    - Only 1 VLAN-aware bridge instance supported
    - FDB ageing timeout parameter is set globally per device

Co-developed-by: Serhiy Boiko <serhiy.boiko@plvision.eu>
Signed-off-by: Serhiy Boiko <serhiy.boiko@plvision.eu>
Co-developed-by: Serhiy Pshyk <serhiy.pshyk@plvision.eu>
Signed-off-by: Serhiy Pshyk <serhiy.pshyk@plvision.eu>
Co-developed-by: Taras Chornyi <taras.chornyi@plvision.eu>
Signed-off-by: Taras Chornyi <taras.chornyi@plvision.eu>
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 107 insertions, 3 deletions

diff --git a/drivers/net/ethernet/marvell/prestera/prestera_main.c b/drivers/net/ethernet/marvell/prestera/prestera_main.c
index bb51ee5646cd..9bd57b89d1d0 100644
--- a/drivers/net/ethernet/marvell/prestera/prestera_main.c
+++ b/drivers/net/ethernet/marvell/prestera/prestera_main.c
@@ -14,6 +14,7 @@
 #include "prestera_rxtx.h"
 #include "prestera_devlink.h"
 #include "prestera_ethtool.h"
+#include "prestera_switchdev.h"
 
 #define PRESTERA_MTU_DEFAULT	1536
 
@@ -23,6 +24,29 @@
 
 static struct workqueue_struct *prestera_wq;
 
+int prestera_port_pvid_set(struct prestera_port *port, u16 vid)
+{
+	enum prestera_accept_frm_type frm_type;
+	int err;
+
+	frm_type = PRESTERA_ACCEPT_FRAME_TYPE_TAGGED;
+
+	if (vid) {
+		err = prestera_hw_vlan_port_vid_set(port, vid);
+		if (err)
+			return err;
+
+		frm_type = PRESTERA_ACCEPT_FRAME_TYPE_ALL;
+	}
+
+	err = prestera_hw_port_accept_frm_type(port, frm_type);
+	if (err && frm_type == PRESTERA_ACCEPT_FRAME_TYPE_ALL)
+		prestera_hw_vlan_port_vid_set(port, port->pvid);
+
+	port->pvid = vid;
+	return 0;
+}
+
 struct prestera_port *prestera_port_find_by_hwid(struct prestera_switch *sw,
 						 u32 dev_id, u32 hw_id)
 {
@@ -38,8 +62,7 @@ struct prestera_port *prestera_port_find_by_hwid(struct prestera_switch *sw,
 	return port;
 }
 
-static struct prestera_port *prestera_find_port(struct prestera_switch *sw,
-						u32 id)
+struct prestera_port *prestera_find_port(struct prestera_switch *sw, u32 id)
 {
 	struct prestera_port *port = NULL;
 
@@ -261,6 +284,8 @@ static int prestera_port_create(struct prestera_switch *sw, u32 id)
 
 	port = netdev_priv(dev);
 
+	INIT_LIST_HEAD(&port->vlans_list);
+	port->pvid = PRESTERA_DEFAULT_VID;
 	port->dev = dev;
 	port->id = id;
 	port->sw = sw;
@@ -452,6 +477,71 @@ static int prestera_switch_set_base_mac_addr(struct prestera_switch *sw)
 	return prestera_hw_switch_mac_set(sw, sw->base_mac);
 }
 
+bool prestera_netdev_check(const struct net_device *dev)
+{
+	return dev->netdev_ops == &prestera_netdev_ops;
+}
+
+static int prestera_lower_dev_walk(struct net_device *dev, void *data)
+{
+	struct prestera_port **pport = data;
+
+	if (prestera_netdev_check(dev)) {
+		*pport = netdev_priv(dev);
+		return 1;
+	}
+
+	return 0;
+}
+
+struct prestera_port *prestera_port_dev_lower_find(struct net_device *dev)
+{
+	struct prestera_port *port = NULL;
+
+	if (prestera_netdev_check(dev))
+		return netdev_priv(dev);
+
+	netdev_walk_all_lower_dev(dev, prestera_lower_dev_walk, &port);
+
+	return port;
+}
+
+static int prestera_netdev_port_event(struct net_device *dev,
+				      unsigned long event, void *ptr)
+{
+	switch (event) {
+	case NETDEV_PRECHANGEUPPER:
+	case NETDEV_CHANGEUPPER:
+		return prestera_bridge_port_event(dev, event, ptr);
+	default:
+		return 0;
+	}
+}
+
+static int prestera_netdev_event_handler(struct notifier_block *nb,
+					 unsigned long event, void *ptr)
+{
+	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+	int err = 0;
+
+	if (prestera_netdev_check(dev))
+		err = prestera_netdev_port_event(dev, event, ptr);
+
+	return notifier_from_errno(err);
+}
+
+static int prestera_netdev_event_handler_register(struct prestera_switch *sw)
+{
+	sw->netdev_nb.notifier_call = prestera_netdev_event_handler;
+
+	return register_netdevice_notifier(&sw->netdev_nb);
+}
+
+static void prestera_netdev_event_handler_unregister(struct prestera_switch *sw)
+{
+	unregister_netdevice_notifier(&sw->netdev_nb);
+}
+
 static int prestera_switch_init(struct prestera_switch *sw)
 {
 	int err;
@@ -469,10 +559,18 @@ static int prestera_switch_init(struct prestera_switch *sw)
 	if (err)
 		return err;
 
-	err = prestera_rxtx_switch_init(sw);
+	err = prestera_netdev_event_handler_register(sw);
 	if (err)
 		return err;
 
+	err = prestera_switchdev_init(sw);
+	if (err)
+		goto err_swdev_register;
+
+	err = prestera_rxtx_switch_init(sw);
+	if (err)
+		goto err_rxtx_register;
+
 	err = prestera_event_handlers_register(sw);
 	if (err)
 		goto err_handlers_register;
@@ -493,6 +591,10 @@ err_dl_register:
 	prestera_event_handlers_unregister(sw);
 err_handlers_register:
 	prestera_rxtx_switch_fini(sw);
+err_rxtx_register:
+	prestera_switchdev_fini(sw);
+err_swdev_register:
+	prestera_netdev_event_handler_unregister(sw);
 	prestera_hw_switch_fini(sw);
 
 	return err;
@@ -504,6 +606,8 @@ static void prestera_switch_fini(struct prestera_switch *sw)
 	prestera_devlink_unregister(sw);
 	prestera_event_handlers_unregister(sw);
 	prestera_rxtx_switch_fini(sw);
+	prestera_switchdev_fini(sw);
+	prestera_netdev_event_handler_unregister(sw);
 	prestera_hw_switch_fini(sw);
 }