| // SPDX-License-Identifier: GPL-2.0+ |
| |
| #include <linux/if_bridge.h> |
| #include <net/switchdev.h> |
| |
| #include "lan966x_main.h" |
| |
| 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_set_mcast_flood(struct lan966x_port *port, |
| bool enabled) |
| { |
| u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_MC)); |
| |
| val = ANA_PGID_PGID_GET(val); |
| if (enabled) |
| 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 void lan966x_port_set_ucast_flood(struct lan966x_port *port, |
| bool enabled) |
| { |
| u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_UC)); |
| |
| val = ANA_PGID_PGID_GET(val); |
| if (enabled) |
| 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_UC)); |
| } |
| |
| static void lan966x_port_set_bcast_flood(struct lan966x_port *port, |
| bool enabled) |
| { |
| u32 val = lan_rd(port->lan966x, ANA_PGID(PGID_BC)); |
| |
| val = ANA_PGID_PGID_GET(val); |
| if (enabled) |
| 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_BC)); |
| } |
| |
| static void lan966x_port_set_learning(struct lan966x_port *port, bool enabled) |
| { |
| lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(enabled), |
| ANA_PORT_CFG_LEARN_ENA, |
| port->lan966x, ANA_PORT_CFG(port->chip_port)); |
| |
| port->learn_ena = enabled; |
| } |
| |
| static void lan966x_port_bridge_flags(struct lan966x_port *port, |
| struct switchdev_brport_flags flags) |
| { |
| if (flags.mask & BR_MCAST_FLOOD) |
| lan966x_port_set_mcast_flood(port, |
| !!(flags.val & BR_MCAST_FLOOD)); |
| |
| if (flags.mask & BR_FLOOD) |
| lan966x_port_set_ucast_flood(port, |
| !!(flags.val & BR_FLOOD)); |
| |
| if (flags.mask & BR_BCAST_FLOOD) |
| lan966x_port_set_bcast_flood(port, |
| !!(flags.val & BR_BCAST_FLOOD)); |
| |
| if (flags.mask & BR_LEARNING) |
| lan966x_port_set_learning(port, |
| !!(flags.val & BR_LEARNING)); |
| } |
| |
| static int lan966x_port_pre_bridge_flags(struct lan966x_port *port, |
| struct switchdev_brport_flags flags) |
| { |
| if (flags.mask & ~(BR_MCAST_FLOOD | BR_FLOOD | BR_BCAST_FLOOD | |
| BR_LEARNING)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static void lan966x_update_fwd_mask(struct lan966x *lan966x) |
| { |
| int i; |
| |
| for (i = 0; i < lan966x->num_phys_ports; i++) { |
| struct lan966x_port *port = lan966x->ports[i]; |
| unsigned long mask = 0; |
| |
| if (port && lan966x->bridge_fwd_mask & BIT(i)) |
| mask = lan966x->bridge_fwd_mask & ~BIT(i); |
| |
| mask |= BIT(CPU_PORT); |
| |
| lan_wr(ANA_PGID_PGID_SET(mask), |
| lan966x, ANA_PGID(PGID_SRC + i)); |
| } |
| } |
| |
| static void lan966x_port_stp_state_set(struct lan966x_port *port, u8 state) |
| { |
| struct lan966x *lan966x = port->lan966x; |
| bool learn_ena = false; |
| |
| if ((state == BR_STATE_FORWARDING || state == BR_STATE_LEARNING) && |
| port->learn_ena) |
| learn_ena = true; |
| |
| if (state == BR_STATE_FORWARDING) |
| lan966x->bridge_fwd_mask |= BIT(port->chip_port); |
| else |
| lan966x->bridge_fwd_mask &= ~BIT(port->chip_port); |
| |
| lan_rmw(ANA_PORT_CFG_LEARN_ENA_SET(learn_ena), |
| ANA_PORT_CFG_LEARN_ENA, |
| lan966x, ANA_PORT_CFG(port->chip_port)); |
| |
| lan966x_update_fwd_mask(lan966x); |
| } |
| |
| static void lan966x_port_ageing_set(struct lan966x_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) / 1000; |
| |
| lan966x_mac_set_ageing(port->lan966x, ageing_time); |
| } |
| |
| static int lan966x_port_attr_set(struct net_device *dev, const void *ctx, |
| const struct switchdev_attr *attr, |
| struct netlink_ext_ack *extack) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| int err = 0; |
| |
| if (ctx && ctx != port) |
| 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; |
| case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME: |
| lan966x_port_ageing_set(port, attr->u.ageing_time); |
| break; |
| case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING: |
| lan966x_vlan_port_set_vlan_aware(port, attr->u.vlan_filtering); |
| lan966x_vlan_port_apply(port); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int lan966x_port_bridge_join(struct lan966x_port *port, |
| struct net_device *bridge, |
| struct netlink_ext_ack *extack) |
| { |
| struct switchdev_brport_flags flags = {0}; |
| struct lan966x *lan966x = port->lan966x; |
| struct net_device *dev = port->dev; |
| int err; |
| |
| if (!lan966x->bridge_mask) { |
| lan966x->bridge = bridge; |
| } else { |
| if (lan966x->bridge != bridge) { |
| NL_SET_ERR_MSG_MOD(extack, "Not allow to add port to different bridge"); |
| return -ENODEV; |
| } |
| } |
| |
| err = switchdev_bridge_port_offload(dev, dev, port, |
| &lan966x_switchdev_nb, |
| &lan966x_switchdev_blocking_nb, |
| false, extack); |
| if (err) |
| return err; |
| |
| lan966x->bridge_mask |= BIT(port->chip_port); |
| |
| flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD; |
| flags.val = flags.mask; |
| lan966x_port_bridge_flags(port, flags); |
| |
| return 0; |
| } |
| |
| static void lan966x_port_bridge_leave(struct lan966x_port *port, |
| struct net_device *bridge) |
| { |
| struct switchdev_brport_flags flags = {0}; |
| struct lan966x *lan966x = port->lan966x; |
| |
| flags.mask = BR_LEARNING | BR_FLOOD | BR_MCAST_FLOOD | BR_BCAST_FLOOD; |
| flags.val = flags.mask & ~BR_LEARNING; |
| lan966x_port_bridge_flags(port, flags); |
| |
| lan966x->bridge_mask &= ~BIT(port->chip_port); |
| |
| if (!lan966x->bridge_mask) |
| lan966x->bridge = NULL; |
| |
| /* Set the port back to host mode */ |
| lan966x_vlan_port_set_vlan_aware(port, false); |
| lan966x_vlan_port_set_vid(port, HOST_PVID, false, false); |
| lan966x_vlan_port_apply(port); |
| } |
| |
| static int lan966x_port_changeupper(struct net_device *dev, |
| struct netdev_notifier_changeupper_info *info) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| struct netlink_ext_ack *extack; |
| int err = 0; |
| |
| extack = netdev_notifier_info_to_extack(&info->info); |
| |
| if (netif_is_bridge_master(info->upper_dev)) { |
| if (info->linking) |
| err = lan966x_port_bridge_join(port, info->upper_dev, |
| extack); |
| else |
| lan966x_port_bridge_leave(port, info->upper_dev); |
| } |
| |
| return err; |
| } |
| |
| static int lan966x_port_prechangeupper(struct net_device *dev, |
| struct netdev_notifier_changeupper_info *info) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| |
| if (netif_is_bridge_master(info->upper_dev) && !info->linking) |
| switchdev_bridge_port_unoffload(port->dev, port, |
| &lan966x_switchdev_nb, |
| &lan966x_switchdev_blocking_nb); |
| |
| return NOTIFY_DONE; |
| } |
| |
| static int lan966x_foreign_bridging_check(struct net_device *bridge, |
| struct netlink_ext_ack *extack) |
| { |
| struct lan966x *lan966x = NULL; |
| bool has_foreign = false; |
| struct net_device *dev; |
| struct list_head *iter; |
| |
| if (!netif_is_bridge_master(bridge)) |
| return 0; |
| |
| netdev_for_each_lower_dev(bridge, dev, iter) { |
| if (lan966x_netdevice_check(dev)) { |
| struct lan966x_port *port = netdev_priv(dev); |
| |
| if (lan966x) { |
| /* Bridge already has at least one port of a |
| * lan966x switch inside it, check that it's |
| * the same instance of the driver. |
| */ |
| if (port->lan966x != lan966x) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Bridging between multiple lan966x switches disallowed"); |
| return -EINVAL; |
| } |
| } else { |
| /* This is the first lan966x port inside this |
| * bridge |
| */ |
| lan966x = port->lan966x; |
| } |
| } else { |
| has_foreign = true; |
| } |
| |
| if (lan966x && has_foreign) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Bridging lan966x ports with foreign interfaces disallowed"); |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int lan966x_bridge_check(struct net_device *dev, |
| struct netdev_notifier_changeupper_info *info) |
| { |
| return lan966x_foreign_bridging_check(info->upper_dev, |
| info->info.extack); |
| } |
| |
| static int lan966x_netdevice_port_event(struct net_device *dev, |
| struct notifier_block *nb, |
| unsigned long event, void *ptr) |
| { |
| int err = 0; |
| |
| if (!lan966x_netdevice_check(dev)) { |
| if (event == NETDEV_CHANGEUPPER) |
| return lan966x_bridge_check(dev, ptr); |
| return 0; |
| } |
| |
| switch (event) { |
| case NETDEV_PRECHANGEUPPER: |
| err = lan966x_port_prechangeupper(dev, ptr); |
| break; |
| case NETDEV_CHANGEUPPER: |
| err = lan966x_bridge_check(dev, ptr); |
| if (err) |
| return err; |
| |
| err = lan966x_port_changeupper(dev, ptr); |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int lan966x_netdevice_event(struct notifier_block *nb, |
| unsigned long event, void *ptr) |
| { |
| struct net_device *dev = netdev_notifier_info_to_dev(ptr); |
| int ret; |
| |
| ret = lan966x_netdevice_port_event(dev, nb, event, ptr); |
| |
| return notifier_from_errno(ret); |
| } |
| |
| static bool lan966x_foreign_dev_check(const struct net_device *dev, |
| const struct net_device *foreign_dev) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| struct lan966x *lan966x = port->lan966x; |
| |
| if (netif_is_bridge_master(foreign_dev)) |
| if (lan966x->bridge != foreign_dev) |
| return true; |
| |
| return false; |
| } |
| |
| static int lan966x_switchdev_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_ATTR_SET: |
| err = switchdev_handle_port_attr_set(dev, ptr, |
| lan966x_netdevice_check, |
| lan966x_port_attr_set); |
| return notifier_from_errno(err); |
| case SWITCHDEV_FDB_ADD_TO_DEVICE: |
| case SWITCHDEV_FDB_DEL_TO_DEVICE: |
| err = switchdev_handle_fdb_event_to_device(dev, event, ptr, |
| lan966x_netdevice_check, |
| lan966x_foreign_dev_check, |
| lan966x_handle_fdb, |
| NULL); |
| return notifier_from_errno(err); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static int lan966x_handle_port_vlan_add(struct lan966x_port *port, |
| const struct switchdev_obj *obj) |
| { |
| const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj); |
| struct lan966x *lan966x = port->lan966x; |
| |
| /* When adding a port to a vlan, we get a callback for the port but |
| * also for the bridge. When get the callback for the bridge just bail |
| * out. Then when the bridge is added to the vlan, then we get a |
| * callback here but in this case the flags has set: |
| * BRIDGE_VLAN_INFO_BRENTRY. In this case it means that the CPU |
| * port is added to the vlan, so the broadcast frames and unicast frames |
| * with dmac of the bridge should be foward to CPU. |
| */ |
| if (netif_is_bridge_master(obj->orig_dev) && |
| !(v->flags & BRIDGE_VLAN_INFO_BRENTRY)) |
| return 0; |
| |
| if (!netif_is_bridge_master(obj->orig_dev)) |
| lan966x_vlan_port_add_vlan(port, v->vid, |
| v->flags & BRIDGE_VLAN_INFO_PVID, |
| v->flags & BRIDGE_VLAN_INFO_UNTAGGED); |
| else |
| lan966x_vlan_cpu_add_vlan(lan966x, v->vid); |
| |
| return 0; |
| } |
| |
| static int lan966x_handle_port_obj_add(struct net_device *dev, const void *ctx, |
| const struct switchdev_obj *obj, |
| struct netlink_ext_ack *extack) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| int err; |
| |
| if (ctx && ctx != port) |
| return 0; |
| |
| switch (obj->id) { |
| case SWITCHDEV_OBJ_ID_PORT_VLAN: |
| err = lan966x_handle_port_vlan_add(port, obj); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int lan966x_handle_port_vlan_del(struct lan966x_port *port, |
| const struct switchdev_obj *obj) |
| { |
| const struct switchdev_obj_port_vlan *v = SWITCHDEV_OBJ_PORT_VLAN(obj); |
| struct lan966x *lan966x = port->lan966x; |
| |
| if (!netif_is_bridge_master(obj->orig_dev)) |
| lan966x_vlan_port_del_vlan(port, v->vid); |
| else |
| lan966x_vlan_cpu_del_vlan(lan966x, v->vid); |
| |
| return 0; |
| } |
| |
| static int lan966x_handle_port_obj_del(struct net_device *dev, const void *ctx, |
| const struct switchdev_obj *obj) |
| { |
| struct lan966x_port *port = netdev_priv(dev); |
| int err; |
| |
| if (ctx && ctx != port) |
| return 0; |
| |
| switch (obj->id) { |
| case SWITCHDEV_OBJ_ID_PORT_VLAN: |
| err = lan966x_handle_port_vlan_del(port, obj); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| return err; |
| } |
| |
| static int lan966x_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 = switchdev_handle_port_obj_add(dev, ptr, |
| lan966x_netdevice_check, |
| lan966x_handle_port_obj_add); |
| return notifier_from_errno(err); |
| case SWITCHDEV_PORT_OBJ_DEL: |
| err = switchdev_handle_port_obj_del(dev, ptr, |
| lan966x_netdevice_check, |
| lan966x_handle_port_obj_del); |
| return notifier_from_errno(err); |
| case SWITCHDEV_PORT_ATTR_SET: |
| err = switchdev_handle_port_attr_set(dev, ptr, |
| lan966x_netdevice_check, |
| lan966x_port_attr_set); |
| return notifier_from_errno(err); |
| } |
| |
| return NOTIFY_DONE; |
| } |
| |
| static struct notifier_block lan966x_netdevice_nb __read_mostly = { |
| .notifier_call = lan966x_netdevice_event, |
| }; |
| |
| static struct notifier_block lan966x_switchdev_nb __read_mostly = { |
| .notifier_call = lan966x_switchdev_event, |
| }; |
| |
| static struct notifier_block lan966x_switchdev_blocking_nb __read_mostly = { |
| .notifier_call = lan966x_switchdev_blocking_event, |
| }; |
| |
| void lan966x_register_notifier_blocks(void) |
| { |
| register_netdevice_notifier(&lan966x_netdevice_nb); |
| register_switchdev_notifier(&lan966x_switchdev_nb); |
| register_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb); |
| } |
| |
| void lan966x_unregister_notifier_blocks(void) |
| { |
| unregister_switchdev_blocking_notifier(&lan966x_switchdev_blocking_nb); |
| unregister_switchdev_notifier(&lan966x_switchdev_nb); |
| unregister_netdevice_notifier(&lan966x_netdevice_nb); |
| } |
