--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/* Microchip Sparx5 Switch driver
+ *
+ * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries.
+ */
+
+#include <linux/if_bridge.h>
+#include <net/switchdev.h>
+
+#include "sparx5_main_regs.h"
+#include "sparx5_main.h"
+
+static struct workqueue_struct *sparx5_owq;
+
+struct sparx5_switchdev_event_work {
+ struct work_struct work;
+ struct switchdev_notifier_fdb_info fdb_info;
+ struct net_device *dev;
+ unsigned long event;
+};
+
+static void sparx5_port_attr_bridge_flags(struct sparx5_port *port,
+ struct switchdev_brport_flags flags)
+{
+ if (flags.mask & BR_MCAST_FLOOD)
+ sparx5_pgid_update_mask(port, PGID_MC_FLOOD, true);
+}
+
+static void sparx5_attr_stp_state_set(struct sparx5_port *port,
+ u8 state)
+{
+ struct sparx5 *sparx5 = port->sparx5;
+
+ if (!test_bit(port->portno, sparx5->bridge_mask)) {
+ netdev_err(port->ndev,
+ "Controlling non-bridged port %d?\n", port->portno);
+ return;
+ }
+
+ switch (state) {
+ case BR_STATE_FORWARDING:
+ set_bit(port->portno, sparx5->bridge_fwd_mask);
+ fallthrough;
+ case BR_STATE_LEARNING:
+ set_bit(port->portno, sparx5->bridge_lrn_mask);
+ break;
+
+ default:
+ /* All other states treated as blocking */
+ clear_bit(port->portno, sparx5->bridge_fwd_mask);
+ clear_bit(port->portno, sparx5->bridge_lrn_mask);
+ break;
+ }
+
+ /* apply the bridge_fwd_mask to all the ports */
+ sparx5_update_fwd(sparx5);
+}
+
+static void sparx5_port_attr_ageing_set(struct sparx5_port *port,
+ unsigned long ageing_clock_t)
+{
+ unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock_t);
+ u32 ageing_time = jiffies_to_msecs(ageing_jiffies);
+
+ sparx5_set_ageing(port->sparx5, ageing_time);
+}
+
+static int sparx5_port_attr_set(struct net_device *dev,
+ const struct switchdev_attr *attr,
+ struct netlink_ext_ack *extack)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+
+ switch (attr->id) {
+ case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
+ sparx5_port_attr_bridge_flags(port, attr->u.brport_flags);
+ break;
+ case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
+ sparx5_attr_stp_state_set(port, attr->u.stp_state);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
+ sparx5_port_attr_ageing_set(port, attr->u.ageing_time);
+ break;
+ case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
+ port->vlan_aware = attr->u.vlan_filtering;
+ sparx5_vlan_port_apply(port->sparx5, port);
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int sparx5_port_bridge_join(struct sparx5_port *port,
+ struct net_device *bridge)
+{
+ struct sparx5 *sparx5 = port->sparx5;
+
+ if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
+ /* First bridged port */
+ sparx5->hw_bridge_dev = bridge;
+ else
+ if (sparx5->hw_bridge_dev != bridge)
+ /* This is adding the port to a second bridge, this is
+ * unsupported
+ */
+ return -ENODEV;
+
+ set_bit(port->portno, sparx5->bridge_mask);
+
+ /* Port enters in bridge mode therefor don't need to copy to CPU
+ * frames for multicast in case the bridge is not requesting them
+ */
+ __dev_mc_unsync(port->ndev, sparx5_mc_unsync);
+
+ return 0;
+}
+
+static void sparx5_port_bridge_leave(struct sparx5_port *port,
+ struct net_device *bridge)
+{
+ struct sparx5 *sparx5 = port->sparx5;
+
+ clear_bit(port->portno, sparx5->bridge_mask);
+ if (bitmap_empty(sparx5->bridge_mask, SPX5_PORTS))
+ sparx5->hw_bridge_dev = NULL;
+
+ /* Clear bridge vlan settings before updating the port settings */
+ port->vlan_aware = 0;
+ port->pvid = NULL_VID;
+ port->vid = NULL_VID;
+
+ /* Port enters in host more therefore restore mc list */
+ __dev_mc_sync(port->ndev, sparx5_mc_sync, sparx5_mc_unsync);
+}
+
+static int sparx5_port_changeupper(struct net_device *dev,
+ struct netdev_notifier_changeupper_info *info)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+ int err = 0;
+
+ if (netif_is_bridge_master(info->upper_dev)) {
+ if (info->linking)
+ err = sparx5_port_bridge_join(port, info->upper_dev);
+ else
+ sparx5_port_bridge_leave(port, info->upper_dev);
+
+ sparx5_vlan_port_apply(port->sparx5, port);
+ }
+
+ return err;
+}
+
+static int sparx5_port_add_addr(struct net_device *dev, bool up)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+ struct sparx5 *sparx5 = port->sparx5;
+ u16 vid = port->pvid;
+
+ if (up)
+ sparx5_mact_learn(sparx5, PGID_CPU, port->ndev->dev_addr, vid);
+ else
+ sparx5_mact_forget(sparx5, port->ndev->dev_addr, vid);
+
+ return 0;
+}
+
+static int sparx5_netdevice_port_event(struct net_device *dev,
+ struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ int err = 0;
+
+ if (!sparx5_netdevice_check(dev))
+ return 0;
+
+ switch (event) {
+ case NETDEV_CHANGEUPPER:
+ err = sparx5_port_changeupper(dev, ptr);
+ break;
+ case NETDEV_PRE_UP:
+ err = sparx5_port_add_addr(dev, true);
+ break;
+ case NETDEV_DOWN:
+ err = sparx5_port_add_addr(dev, false);
+ break;
+ }
+
+ return err;
+}
+
+static int sparx5_netdevice_event(struct notifier_block *nb,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+ int ret = 0;
+
+ ret = sparx5_netdevice_port_event(dev, nb, event, ptr);
+
+ return notifier_from_errno(ret);
+}
+
+static void sparx5_switchdev_bridge_fdb_event_work(struct work_struct *work)
+{
+ struct sparx5_switchdev_event_work *switchdev_work =
+ container_of(work, struct sparx5_switchdev_event_work, work);
+ struct net_device *dev = switchdev_work->dev;
+ struct switchdev_notifier_fdb_info *fdb_info;
+ struct sparx5_port *port;
+ struct sparx5 *sparx5;
+
+ rtnl_lock();
+ if (!sparx5_netdevice_check(dev))
+ goto out;
+
+ port = netdev_priv(dev);
+ sparx5 = port->sparx5;
+
+ fdb_info = &switchdev_work->fdb_info;
+
+ switch (switchdev_work->event) {
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ if (!fdb_info->added_by_user)
+ break;
+ sparx5_add_mact_entry(sparx5, port, fdb_info->addr,
+ fdb_info->vid);
+ break;
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ if (!fdb_info->added_by_user)
+ break;
+ sparx5_del_mact_entry(sparx5, fdb_info->addr, fdb_info->vid);
+ break;
+ }
+
+out:
+ rtnl_unlock();
+ kfree(switchdev_work->fdb_info.addr);
+ kfree(switchdev_work);
+ dev_put(dev);
+}
+
+static void sparx5_schedule_work(struct work_struct *work)
+{
+ queue_work(sparx5_owq, work);
+}
+
+static int sparx5_switchdev_event(struct notifier_block *unused,
+ unsigned long event, void *ptr)
+{
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+ struct sparx5_switchdev_event_work *switchdev_work;
+ struct switchdev_notifier_fdb_info *fdb_info;
+ struct switchdev_notifier_info *info = ptr;
+ int err;
+
+ switch (event) {
+ case SWITCHDEV_PORT_ATTR_SET:
+ err = switchdev_handle_port_attr_set(dev, ptr,
+ sparx5_netdevice_check,
+ sparx5_port_attr_set);
+ return notifier_from_errno(err);
+ case SWITCHDEV_FDB_ADD_TO_DEVICE:
+ fallthrough;
+ case SWITCHDEV_FDB_DEL_TO_DEVICE:
+ switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
+ if (!switchdev_work)
+ return NOTIFY_BAD;
+
+ switchdev_work->dev = dev;
+ switchdev_work->event = event;
+
+ fdb_info = container_of(info,
+ struct switchdev_notifier_fdb_info,
+ info);
+ INIT_WORK(&switchdev_work->work,
+ sparx5_switchdev_bridge_fdb_event_work);
+ memcpy(&switchdev_work->fdb_info, ptr,
+ sizeof(switchdev_work->fdb_info));
+ switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
+ if (!switchdev_work->fdb_info.addr)
+ goto err_addr_alloc;
+
+ ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
+ fdb_info->addr);
+ dev_hold(dev);
+
+ sparx5_schedule_work(&switchdev_work->work);
+ break;
+ }
+
+ return NOTIFY_DONE;
+err_addr_alloc:
+ kfree(switchdev_work);
+ return NOTIFY_BAD;
+}
+
+static void sparx5_sync_port_dev_addr(struct sparx5 *sparx5,
+ struct sparx5_port *port,
+ u16 vid, bool add)
+{
+ if (!port ||
+ !test_bit(port->portno, sparx5->bridge_mask))
+ return; /* Skip null/host interfaces */
+
+ /* Bridge connects to vid? */
+ if (add) {
+ /* Add port MAC address from the VLAN */
+ sparx5_mact_learn(sparx5, PGID_CPU,
+ port->ndev->dev_addr, vid);
+ } else {
+ /* Control port addr visibility depending on
+ * port VLAN connectivity.
+ */
+ if (test_bit(port->portno, sparx5->vlan_mask[vid]))
+ sparx5_mact_learn(sparx5, PGID_CPU,
+ port->ndev->dev_addr, vid);
+ else
+ sparx5_mact_forget(sparx5,
+ port->ndev->dev_addr, vid);
+ }
+}
+
+static void sparx5_sync_bridge_dev_addr(struct net_device *dev,
+ struct sparx5 *sparx5,
+ u16 vid, bool add)
+{
+ int i;
+
+ /* First, handle bridge address'es */
+ if (add) {
+ sparx5_mact_learn(sparx5, PGID_CPU, dev->dev_addr,
+ vid);
+ sparx5_mact_learn(sparx5, PGID_BCAST, dev->broadcast,
+ vid);
+ } else {
+ sparx5_mact_forget(sparx5, dev->dev_addr, vid);
+ sparx5_mact_forget(sparx5, dev->broadcast, vid);
+ }
+
+ /* Now look at bridged ports */
+ for (i = 0; i < SPX5_PORTS; i++)
+ sparx5_sync_port_dev_addr(sparx5, sparx5->ports[i], vid, add);
+}
+
+static int sparx5_handle_port_vlan_add(struct net_device *dev,
+ struct notifier_block *nb,
+ const struct switchdev_obj_port_vlan *v)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+
+ if (netif_is_bridge_master(dev)) {
+ if (v->flags & BRIDGE_VLAN_INFO_BRENTRY) {
+ struct sparx5 *sparx5 =
+ container_of(nb, struct sparx5,
+ switchdev_blocking_nb);
+
+ sparx5_sync_bridge_dev_addr(dev, sparx5, v->vid, true);
+ }
+ return 0;
+ }
+
+ if (!sparx5_netdevice_check(dev))
+ return -EOPNOTSUPP;
+
+ return sparx5_vlan_vid_add(port, v->vid,
+ v->flags & BRIDGE_VLAN_INFO_PVID,
+ v->flags & BRIDGE_VLAN_INFO_UNTAGGED);
+}
+
+static int sparx5_handle_port_obj_add(struct net_device *dev,
+ struct notifier_block *nb,
+ struct switchdev_notifier_port_obj_info *info)
+{
+ const struct switchdev_obj *obj = info->obj;
+ int err;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = sparx5_handle_port_vlan_add(dev, nb,
+ SWITCHDEV_OBJ_PORT_VLAN(obj));
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ info->handled = true;
+ return err;
+}
+
+static int sparx5_handle_port_vlan_del(struct net_device *dev,
+ struct notifier_block *nb,
+ u16 vid)
+{
+ struct sparx5_port *port = netdev_priv(dev);
+ int ret;
+
+ /* Master bridge? */
+ if (netif_is_bridge_master(dev)) {
+ struct sparx5 *sparx5 =
+ container_of(nb, struct sparx5,
+ switchdev_blocking_nb);
+
+ sparx5_sync_bridge_dev_addr(dev, sparx5, vid, false);
+ return 0;
+ }
+
+ if (!sparx5_netdevice_check(dev))
+ return -EOPNOTSUPP;
+
+ ret = sparx5_vlan_vid_del(port, vid);
+ if (ret)
+ return ret;
+
+ /* Delete the port MAC address with the matching VLAN information */
+ sparx5_mact_forget(port->sparx5, port->ndev->dev_addr, vid);
+
+ return 0;
+}
+
+static int sparx5_handle_port_obj_del(struct net_device *dev,
+ struct notifier_block *nb,
+ struct switchdev_notifier_port_obj_info *info)
+{
+ const struct switchdev_obj *obj = info->obj;
+ int err;
+
+ switch (obj->id) {
+ case SWITCHDEV_OBJ_ID_PORT_VLAN:
+ err = sparx5_handle_port_vlan_del(dev, nb,
+ SWITCHDEV_OBJ_PORT_VLAN(obj)->vid);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ break;
+ }
+
+ info->handled = true;
+ return err;
+}
+
+static int sparx5_switchdev_blocking_event(struct notifier_block *nb,
+ unsigned long event,
+ void *ptr)
+{
+ struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
+ int err;
+
+ switch (event) {
+ case SWITCHDEV_PORT_OBJ_ADD:
+ err = sparx5_handle_port_obj_add(dev, nb, ptr);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_OBJ_DEL:
+ err = sparx5_handle_port_obj_del(dev, nb, ptr);
+ return notifier_from_errno(err);
+ case SWITCHDEV_PORT_ATTR_SET:
+ err = switchdev_handle_port_attr_set(dev, ptr,
+ sparx5_netdevice_check,
+ sparx5_port_attr_set);
+ return notifier_from_errno(err);
+ }
+
+ return NOTIFY_DONE;
+}
+
+int sparx5_register_notifier_blocks(struct sparx5 *s5)
+{
+ int err;
+
+ s5->netdevice_nb.notifier_call = sparx5_netdevice_event;
+ err = register_netdevice_notifier(&s5->netdevice_nb);
+ if (err)
+ return err;
+
+ s5->switchdev_nb.notifier_call = sparx5_switchdev_event;
+ err = register_switchdev_notifier(&s5->switchdev_nb);
+ if (err)
+ goto err_switchdev_nb;
+
+ s5->switchdev_blocking_nb.notifier_call = sparx5_switchdev_blocking_event;
+ err = register_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
+ if (err)
+ goto err_switchdev_blocking_nb;
+
+ sparx5_owq = alloc_ordered_workqueue("sparx5_order", 0);
+ if (!sparx5_owq)
+ goto err_switchdev_blocking_nb;
+
+ return 0;
+
+err_switchdev_blocking_nb:
+ unregister_switchdev_notifier(&s5->switchdev_nb);
+err_switchdev_nb:
+ unregister_netdevice_notifier(&s5->netdevice_nb);
+
+ return err;
+}
+
+void sparx5_unregister_notifier_blocks(struct sparx5 *s5)
+{
+ destroy_workqueue(sparx5_owq);
+
+ unregister_switchdev_blocking_notifier(&s5->switchdev_blocking_nb);
+ unregister_switchdev_notifier(&s5->switchdev_nb);
+ unregister_netdevice_notifier(&s5->netdevice_nb);
+}
projects / linux-2.6-microblaze.git / commitdiff