| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| /* |
| * net/dsa/dsa_priv.h - Hardware switch handling |
| * Copyright (c) 2008-2009 Marvell Semiconductor |
| */ |
| |
| #ifndef __DSA_PRIV_H |
| #define __DSA_PRIV_H |
| |
| #include <linux/if_bridge.h> |
| #include <linux/phy.h> |
| #include <linux/netdevice.h> |
| #include <linux/netpoll.h> |
| #include <net/dsa.h> |
| #include <net/gro_cells.h> |
| |
| #define DSA_MAX_NUM_OFFLOADING_BRIDGES BITS_PER_LONG |
| |
| enum { |
| DSA_NOTIFIER_AGEING_TIME, |
| DSA_NOTIFIER_BRIDGE_JOIN, |
| DSA_NOTIFIER_BRIDGE_LEAVE, |
| DSA_NOTIFIER_FDB_ADD, |
| DSA_NOTIFIER_FDB_DEL, |
| DSA_NOTIFIER_HOST_FDB_ADD, |
| DSA_NOTIFIER_HOST_FDB_DEL, |
| DSA_NOTIFIER_HSR_JOIN, |
| DSA_NOTIFIER_HSR_LEAVE, |
| DSA_NOTIFIER_LAG_CHANGE, |
| DSA_NOTIFIER_LAG_JOIN, |
| DSA_NOTIFIER_LAG_LEAVE, |
| DSA_NOTIFIER_MDB_ADD, |
| DSA_NOTIFIER_MDB_DEL, |
| DSA_NOTIFIER_HOST_MDB_ADD, |
| DSA_NOTIFIER_HOST_MDB_DEL, |
| DSA_NOTIFIER_VLAN_ADD, |
| DSA_NOTIFIER_VLAN_DEL, |
| DSA_NOTIFIER_MTU, |
| DSA_NOTIFIER_TAG_PROTO, |
| DSA_NOTIFIER_MRP_ADD, |
| DSA_NOTIFIER_MRP_DEL, |
| DSA_NOTIFIER_MRP_ADD_RING_ROLE, |
| DSA_NOTIFIER_MRP_DEL_RING_ROLE, |
| DSA_NOTIFIER_TAG_8021Q_VLAN_ADD, |
| DSA_NOTIFIER_TAG_8021Q_VLAN_DEL, |
| }; |
| |
| /* DSA_NOTIFIER_AGEING_TIME */ |
| struct dsa_notifier_ageing_time_info { |
| unsigned int ageing_time; |
| }; |
| |
| /* DSA_NOTIFIER_BRIDGE_* */ |
| struct dsa_notifier_bridge_info { |
| struct net_device *br; |
| int tree_index; |
| int sw_index; |
| int port; |
| }; |
| |
| /* DSA_NOTIFIER_FDB_* */ |
| struct dsa_notifier_fdb_info { |
| int sw_index; |
| int port; |
| const unsigned char *addr; |
| u16 vid; |
| }; |
| |
| /* DSA_NOTIFIER_MDB_* */ |
| struct dsa_notifier_mdb_info { |
| const struct switchdev_obj_port_mdb *mdb; |
| int sw_index; |
| int port; |
| }; |
| |
| /* DSA_NOTIFIER_LAG_* */ |
| struct dsa_notifier_lag_info { |
| struct net_device *lag; |
| int sw_index; |
| int port; |
| |
| struct netdev_lag_upper_info *info; |
| }; |
| |
| /* DSA_NOTIFIER_VLAN_* */ |
| struct dsa_notifier_vlan_info { |
| const struct switchdev_obj_port_vlan *vlan; |
| int sw_index; |
| int port; |
| struct netlink_ext_ack *extack; |
| }; |
| |
| /* DSA_NOTIFIER_MTU */ |
| struct dsa_notifier_mtu_info { |
| bool targeted_match; |
| int sw_index; |
| int port; |
| int mtu; |
| }; |
| |
| /* DSA_NOTIFIER_TAG_PROTO_* */ |
| struct dsa_notifier_tag_proto_info { |
| const struct dsa_device_ops *tag_ops; |
| }; |
| |
| /* DSA_NOTIFIER_MRP_* */ |
| struct dsa_notifier_mrp_info { |
| const struct switchdev_obj_mrp *mrp; |
| int sw_index; |
| int port; |
| }; |
| |
| /* DSA_NOTIFIER_MRP_* */ |
| struct dsa_notifier_mrp_ring_role_info { |
| const struct switchdev_obj_ring_role_mrp *mrp; |
| int sw_index; |
| int port; |
| }; |
| |
| /* DSA_NOTIFIER_TAG_8021Q_VLAN_* */ |
| struct dsa_notifier_tag_8021q_vlan_info { |
| int tree_index; |
| int sw_index; |
| int port; |
| u16 vid; |
| }; |
| |
| struct dsa_switchdev_event_work { |
| struct dsa_switch *ds; |
| int port; |
| struct net_device *dev; |
| struct work_struct work; |
| unsigned long event; |
| /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and |
| * SWITCHDEV_FDB_DEL_TO_DEVICE |
| */ |
| unsigned char addr[ETH_ALEN]; |
| u16 vid; |
| bool host_addr; |
| }; |
| |
| /* DSA_NOTIFIER_HSR_* */ |
| struct dsa_notifier_hsr_info { |
| struct net_device *hsr; |
| int sw_index; |
| int port; |
| }; |
| |
| struct dsa_slave_priv { |
| /* Copy of CPU port xmit for faster access in slave transmit hot path */ |
| struct sk_buff * (*xmit)(struct sk_buff *skb, |
| struct net_device *dev); |
| |
| struct gro_cells gcells; |
| |
| /* DSA port data, such as switch, port index, etc. */ |
| struct dsa_port *dp; |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| struct netpoll *netpoll; |
| #endif |
| |
| /* TC context */ |
| struct list_head mall_tc_list; |
| }; |
| |
| /* dsa.c */ |
| const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol); |
| void dsa_tag_driver_put(const struct dsa_device_ops *ops); |
| const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf); |
| |
| bool dsa_schedule_work(struct work_struct *work); |
| void dsa_flush_workqueue(void); |
| const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops); |
| |
| static inline int dsa_tag_protocol_overhead(const struct dsa_device_ops *ops) |
| { |
| return ops->needed_headroom + ops->needed_tailroom; |
| } |
| |
| /* master.c */ |
| int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp); |
| void dsa_master_teardown(struct net_device *dev); |
| |
| static inline struct net_device *dsa_master_find_slave(struct net_device *dev, |
| int device, int port) |
| { |
| struct dsa_port *cpu_dp = dev->dsa_ptr; |
| struct dsa_switch_tree *dst = cpu_dp->dst; |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dp->ds->index == device && dp->index == port && |
| dp->type == DSA_PORT_TYPE_USER) |
| return dp->slave; |
| |
| return NULL; |
| } |
| |
| /* port.c */ |
| bool dsa_port_supports_hwtstamp(struct dsa_port *dp, struct ifreq *ifr); |
| void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp, |
| const struct dsa_device_ops *tag_ops); |
| int dsa_port_set_state(struct dsa_port *dp, u8 state, bool do_fast_age); |
| int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy); |
| int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy); |
| void dsa_port_disable_rt(struct dsa_port *dp); |
| void dsa_port_disable(struct dsa_port *dp); |
| int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br, |
| struct netlink_ext_ack *extack); |
| void dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br); |
| void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br); |
| int dsa_port_lag_change(struct dsa_port *dp, |
| struct netdev_lag_lower_state_info *linfo); |
| int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev, |
| struct netdev_lag_upper_info *uinfo, |
| struct netlink_ext_ack *extack); |
| void dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev); |
| void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev); |
| int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering, |
| struct netlink_ext_ack *extack); |
| bool dsa_port_skip_vlan_configuration(struct dsa_port *dp); |
| int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock); |
| int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu, |
| bool targeted_match); |
| int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid); |
| int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid); |
| int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid); |
| int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid); |
| int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data); |
| int dsa_port_mdb_add(const struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb); |
| int dsa_port_mdb_del(const struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb); |
| int dsa_port_host_mdb_add(const struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb); |
| int dsa_port_host_mdb_del(const struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb); |
| int dsa_port_pre_bridge_flags(const struct dsa_port *dp, |
| struct switchdev_brport_flags flags, |
| struct netlink_ext_ack *extack); |
| int dsa_port_bridge_flags(struct dsa_port *dp, |
| struct switchdev_brport_flags flags, |
| struct netlink_ext_ack *extack); |
| int dsa_port_vlan_add(struct dsa_port *dp, |
| const struct switchdev_obj_port_vlan *vlan, |
| struct netlink_ext_ack *extack); |
| int dsa_port_vlan_del(struct dsa_port *dp, |
| const struct switchdev_obj_port_vlan *vlan); |
| int dsa_port_mrp_add(const struct dsa_port *dp, |
| const struct switchdev_obj_mrp *mrp); |
| int dsa_port_mrp_del(const struct dsa_port *dp, |
| const struct switchdev_obj_mrp *mrp); |
| int dsa_port_mrp_add_ring_role(const struct dsa_port *dp, |
| const struct switchdev_obj_ring_role_mrp *mrp); |
| int dsa_port_mrp_del_ring_role(const struct dsa_port *dp, |
| const struct switchdev_obj_ring_role_mrp *mrp); |
| int dsa_port_link_register_of(struct dsa_port *dp); |
| void dsa_port_link_unregister_of(struct dsa_port *dp); |
| int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr); |
| void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr); |
| int dsa_port_tag_8021q_vlan_add(struct dsa_port *dp, u16 vid, bool broadcast); |
| void dsa_port_tag_8021q_vlan_del(struct dsa_port *dp, u16 vid, bool broadcast); |
| extern const struct phylink_mac_ops dsa_port_phylink_mac_ops; |
| |
| static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp, |
| const struct net_device *dev) |
| { |
| return dsa_port_to_bridge_port(dp) == dev; |
| } |
| |
| static inline bool dsa_port_offloads_bridge(struct dsa_port *dp, |
| const struct net_device *bridge_dev) |
| { |
| /* DSA ports connected to a bridge, and event was emitted |
| * for the bridge. |
| */ |
| return dp->bridge_dev == bridge_dev; |
| } |
| |
| /* Returns true if any port of this tree offloads the given net_device */ |
| static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst, |
| const struct net_device *dev) |
| { |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dsa_port_offloads_bridge_port(dp, dev)) |
| return true; |
| |
| return false; |
| } |
| |
| /* Returns true if any port of this tree offloads the given bridge */ |
| static inline bool dsa_tree_offloads_bridge(struct dsa_switch_tree *dst, |
| const struct net_device *bridge_dev) |
| { |
| struct dsa_port *dp; |
| |
| list_for_each_entry(dp, &dst->ports, list) |
| if (dsa_port_offloads_bridge(dp, bridge_dev)) |
| return true; |
| |
| return false; |
| } |
| |
| /* slave.c */ |
| extern const struct dsa_device_ops notag_netdev_ops; |
| extern struct notifier_block dsa_slave_switchdev_notifier; |
| extern struct notifier_block dsa_slave_switchdev_blocking_notifier; |
| |
| void dsa_slave_mii_bus_init(struct dsa_switch *ds); |
| int dsa_slave_create(struct dsa_port *dp); |
| void dsa_slave_destroy(struct net_device *slave_dev); |
| int dsa_slave_suspend(struct net_device *slave_dev); |
| int dsa_slave_resume(struct net_device *slave_dev); |
| int dsa_slave_register_notifier(void); |
| void dsa_slave_unregister_notifier(void); |
| void dsa_slave_setup_tagger(struct net_device *slave); |
| int dsa_slave_change_mtu(struct net_device *dev, int new_mtu); |
| int dsa_slave_manage_vlan_filtering(struct net_device *dev, |
| bool vlan_filtering); |
| |
| static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev) |
| { |
| struct dsa_slave_priv *p = netdev_priv(dev); |
| |
| return p->dp; |
| } |
| |
| static inline struct net_device * |
| dsa_slave_to_master(const struct net_device *dev) |
| { |
| struct dsa_port *dp = dsa_slave_to_port(dev); |
| |
| return dp->cpu_dp->master; |
| } |
| |
| /* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged |
| * frames as untagged, since the bridge will not untag them. |
| */ |
| static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb) |
| { |
| struct dsa_port *dp = dsa_slave_to_port(skb->dev); |
| struct net_device *br = dp->bridge_dev; |
| struct net_device *dev = skb->dev; |
| struct net_device *upper_dev; |
| u16 vid, pvid, proto; |
| int err; |
| |
| if (!br || br_vlan_enabled(br)) |
| return skb; |
| |
| err = br_vlan_get_proto(br, &proto); |
| if (err) |
| return skb; |
| |
| /* Move VLAN tag from data to hwaccel */ |
| if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) { |
| skb = skb_vlan_untag(skb); |
| if (!skb) |
| return NULL; |
| } |
| |
| if (!skb_vlan_tag_present(skb)) |
| return skb; |
| |
| vid = skb_vlan_tag_get_id(skb); |
| |
| /* We already run under an RCU read-side critical section since |
| * we are called from netif_receive_skb_list_internal(). |
| */ |
| err = br_vlan_get_pvid_rcu(dev, &pvid); |
| if (err) |
| return skb; |
| |
| if (vid != pvid) |
| return skb; |
| |
| /* The sad part about attempting to untag from DSA is that we |
| * don't know, unless we check, if the skb will end up in |
| * the bridge's data path - br_allowed_ingress() - or not. |
| * For example, there might be an 8021q upper for the |
| * default_pvid of the bridge, which will steal VLAN-tagged traffic |
| * from the bridge's data path. This is a configuration that DSA |
| * supports because vlan_filtering is 0. In that case, we should |
| * definitely keep the tag, to make sure it keeps working. |
| */ |
| upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid); |
| if (upper_dev) |
| return skb; |
| |
| __vlan_hwaccel_clear_tag(skb); |
| |
| return skb; |
| } |
| |
| /* For switches without hardware support for DSA tagging to be able |
| * to support termination through the bridge. |
| */ |
| static inline struct net_device * |
| dsa_find_designated_bridge_port_by_vid(struct net_device *master, u16 vid) |
| { |
| struct dsa_port *cpu_dp = master->dsa_ptr; |
| struct dsa_switch_tree *dst = cpu_dp->dst; |
| struct bridge_vlan_info vinfo; |
| struct net_device *slave; |
| struct dsa_port *dp; |
| int err; |
| |
| list_for_each_entry(dp, &dst->ports, list) { |
| if (dp->type != DSA_PORT_TYPE_USER) |
| continue; |
| |
| if (!dp->bridge_dev) |
| continue; |
| |
| if (dp->stp_state != BR_STATE_LEARNING && |
| dp->stp_state != BR_STATE_FORWARDING) |
| continue; |
| |
| /* Since the bridge might learn this packet, keep the CPU port |
| * affinity with the port that will be used for the reply on |
| * xmit. |
| */ |
| if (dp->cpu_dp != cpu_dp) |
| continue; |
| |
| slave = dp->slave; |
| |
| err = br_vlan_get_info_rcu(slave, vid, &vinfo); |
| if (err) |
| continue; |
| |
| return slave; |
| } |
| |
| return NULL; |
| } |
| |
| /* If the ingress port offloads the bridge, we mark the frame as autonomously |
| * forwarded by hardware, so the software bridge doesn't forward in twice, back |
| * to us, because we already did. However, if we're in fallback mode and we do |
| * software bridging, we are not offloading it, therefore the dp->bridge_dev |
| * pointer is not populated, and flooding needs to be done by software (we are |
| * effectively operating in standalone ports mode). |
| */ |
| static inline void dsa_default_offload_fwd_mark(struct sk_buff *skb) |
| { |
| struct dsa_port *dp = dsa_slave_to_port(skb->dev); |
| |
| skb->offload_fwd_mark = !!(dp->bridge_dev); |
| } |
| |
| /* Helper for removing DSA header tags from packets in the RX path. |
| * Must not be called before skb_pull(len). |
| * skb->data |
| * | |
| * v |
| * | | | | | | | | | | | | | | | | | | | |
| * +-----------------------+-----------------------+---------------+-------+ |
| * | Destination MAC | Source MAC | DSA header | EType | |
| * +-----------------------+-----------------------+---------------+-------+ |
| * | | |
| * <----- len -----> <----- len -----> |
| * | |
| * >>>>>>> v |
| * >>>>>>> | | | | | | | | | | | | | | | |
| * >>>>>>> +-----------------------+-----------------------+-------+ |
| * >>>>>>> | Destination MAC | Source MAC | EType | |
| * +-----------------------+-----------------------+-------+ |
| * ^ |
| * | |
| * skb->data |
| */ |
| static inline void dsa_strip_etype_header(struct sk_buff *skb, int len) |
| { |
| memmove(skb->data - ETH_HLEN, skb->data - ETH_HLEN - len, 2 * ETH_ALEN); |
| } |
| |
| /* Helper for creating space for DSA header tags in TX path packets. |
| * Must not be called before skb_push(len). |
| * |
| * Before: |
| * |
| * <<<<<<< | | | | | | | | | | | | | | | |
| * ^ <<<<<<< +-----------------------+-----------------------+-------+ |
| * | <<<<<<< | Destination MAC | Source MAC | EType | |
| * | +-----------------------+-----------------------+-------+ |
| * <----- len -----> |
| * | |
| * | |
| * skb->data |
| * |
| * After: |
| * |
| * | | | | | | | | | | | | | | | | | | | |
| * +-----------------------+-----------------------+---------------+-------+ |
| * | Destination MAC | Source MAC | DSA header | EType | |
| * +-----------------------+-----------------------+---------------+-------+ |
| * ^ | | |
| * | <----- len -----> |
| * skb->data |
| */ |
| static inline void dsa_alloc_etype_header(struct sk_buff *skb, int len) |
| { |
| memmove(skb->data, skb->data + len, 2 * ETH_ALEN); |
| } |
| |
| /* On RX, eth_type_trans() on the DSA master pulls ETH_HLEN bytes starting from |
| * skb_mac_header(skb), which leaves skb->data pointing at the first byte after |
| * what the DSA master perceives as the EtherType (the beginning of the L3 |
| * protocol). Since DSA EtherType header taggers treat the EtherType as part of |
| * the DSA tag itself, and the EtherType is 2 bytes in length, the DSA header |
| * is located 2 bytes behind skb->data. Note that EtherType in this context |
| * means the first 2 bytes of the DSA header, not the encapsulated EtherType |
| * that will become visible after the DSA header is stripped. |
| */ |
| static inline void *dsa_etype_header_pos_rx(struct sk_buff *skb) |
| { |
| return skb->data - 2; |
| } |
| |
| /* On TX, skb->data points to skb_mac_header(skb), which means that EtherType |
| * header taggers start exactly where the EtherType is (the EtherType is |
| * treated as part of the DSA header). |
| */ |
| static inline void *dsa_etype_header_pos_tx(struct sk_buff *skb) |
| { |
| return skb->data + 2 * ETH_ALEN; |
| } |
| |
| /* switch.c */ |
| int dsa_switch_register_notifier(struct dsa_switch *ds); |
| void dsa_switch_unregister_notifier(struct dsa_switch *ds); |
| |
| /* dsa2.c */ |
| void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag); |
| void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag); |
| int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v); |
| int dsa_broadcast(unsigned long e, void *v); |
| int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst, |
| struct net_device *master, |
| const struct dsa_device_ops *tag_ops, |
| const struct dsa_device_ops *old_tag_ops); |
| int dsa_bridge_num_get(const struct net_device *bridge_dev, int max); |
| void dsa_bridge_num_put(const struct net_device *bridge_dev, int bridge_num); |
| |
| /* tag_8021q.c */ |
| int dsa_tag_8021q_bridge_join(struct dsa_switch *ds, |
| struct dsa_notifier_bridge_info *info); |
| int dsa_tag_8021q_bridge_leave(struct dsa_switch *ds, |
| struct dsa_notifier_bridge_info *info); |
| int dsa_switch_tag_8021q_vlan_add(struct dsa_switch *ds, |
| struct dsa_notifier_tag_8021q_vlan_info *info); |
| int dsa_switch_tag_8021q_vlan_del(struct dsa_switch *ds, |
| struct dsa_notifier_tag_8021q_vlan_info *info); |
| |
| extern struct list_head dsa_tree_list; |
| |
| #endif |