1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * net/dsa/dsa_priv.h - Hardware switch handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
10 #include <linux/if_bridge.h>
11 #include <linux/phy.h>
12 #include <linux/netdevice.h>
13 #include <linux/netpoll.h>
15 #include <net/gro_cells.h>
18 DSA_NOTIFIER_AGEING_TIME,
19 DSA_NOTIFIER_BRIDGE_JOIN,
20 DSA_NOTIFIER_BRIDGE_LEAVE,
23 DSA_NOTIFIER_HSR_JOIN,
24 DSA_NOTIFIER_HSR_LEAVE,
25 DSA_NOTIFIER_LAG_CHANGE,
26 DSA_NOTIFIER_LAG_JOIN,
27 DSA_NOTIFIER_LAG_LEAVE,
30 DSA_NOTIFIER_VLAN_ADD,
31 DSA_NOTIFIER_VLAN_DEL,
33 DSA_NOTIFIER_TAG_PROTO,
36 /* DSA_NOTIFIER_AGEING_TIME */
37 struct dsa_notifier_ageing_time_info {
38 unsigned int ageing_time;
41 /* DSA_NOTIFIER_BRIDGE_* */
42 struct dsa_notifier_bridge_info {
43 struct net_device *br;
49 /* DSA_NOTIFIER_FDB_* */
50 struct dsa_notifier_fdb_info {
53 const unsigned char *addr;
57 /* DSA_NOTIFIER_MDB_* */
58 struct dsa_notifier_mdb_info {
59 const struct switchdev_obj_port_mdb *mdb;
64 /* DSA_NOTIFIER_LAG_* */
65 struct dsa_notifier_lag_info {
66 struct net_device *lag;
70 struct netdev_lag_upper_info *info;
73 /* DSA_NOTIFIER_VLAN_* */
74 struct dsa_notifier_vlan_info {
75 const struct switchdev_obj_port_vlan *vlan;
80 /* DSA_NOTIFIER_MTU */
81 struct dsa_notifier_mtu_info {
82 bool propagate_upstream;
88 /* DSA_NOTIFIER_TAG_PROTO_* */
89 struct dsa_notifier_tag_proto_info {
90 const struct dsa_device_ops *tag_ops;
93 struct dsa_switchdev_event_work {
94 struct dsa_switch *ds;
96 struct work_struct work;
98 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
99 * SWITCHDEV_FDB_DEL_TO_DEVICE
101 unsigned char addr[ETH_ALEN];
105 /* DSA_NOTIFIER_HSR_* */
106 struct dsa_notifier_hsr_info {
107 struct net_device *hsr;
112 struct dsa_slave_priv {
113 /* Copy of CPU port xmit for faster access in slave transmit hot path */
114 struct sk_buff * (*xmit)(struct sk_buff *skb,
115 struct net_device *dev);
117 struct gro_cells gcells;
119 /* DSA port data, such as switch, port index, etc. */
122 #ifdef CONFIG_NET_POLL_CONTROLLER
123 struct netpoll *netpoll;
127 struct list_head mall_tc_list;
131 const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
132 void dsa_tag_driver_put(const struct dsa_device_ops *ops);
133 const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf);
135 bool dsa_schedule_work(struct work_struct *work);
136 const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
139 int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
140 void dsa_master_teardown(struct net_device *dev);
142 static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
143 int device, int port)
145 struct dsa_port *cpu_dp = dev->dsa_ptr;
146 struct dsa_switch_tree *dst = cpu_dp->dst;
149 list_for_each_entry(dp, &dst->ports, list)
150 if (dp->ds->index == device && dp->index == port &&
151 dp->type == DSA_PORT_TYPE_USER)
158 void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
159 const struct dsa_device_ops *tag_ops);
160 int dsa_port_set_state(struct dsa_port *dp, u8 state);
161 int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
162 int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
163 void dsa_port_disable_rt(struct dsa_port *dp);
164 void dsa_port_disable(struct dsa_port *dp);
165 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br);
166 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
167 int dsa_port_lag_change(struct dsa_port *dp,
168 struct netdev_lag_lower_state_info *linfo);
169 int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
170 struct netdev_lag_upper_info *uinfo);
171 void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
172 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering);
173 bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
174 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
175 int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
176 bool propagate_upstream);
177 int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
179 int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
181 int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
182 int dsa_port_mdb_add(const struct dsa_port *dp,
183 const struct switchdev_obj_port_mdb *mdb);
184 int dsa_port_mdb_del(const struct dsa_port *dp,
185 const struct switchdev_obj_port_mdb *mdb);
186 int dsa_port_pre_bridge_flags(const struct dsa_port *dp, unsigned long flags);
187 int dsa_port_bridge_flags(const struct dsa_port *dp, unsigned long flags);
188 int dsa_port_mrouter(struct dsa_port *dp, bool mrouter);
189 int dsa_port_vlan_add(struct dsa_port *dp,
190 const struct switchdev_obj_port_vlan *vlan);
191 int dsa_port_vlan_del(struct dsa_port *dp,
192 const struct switchdev_obj_port_vlan *vlan);
193 int dsa_port_link_register_of(struct dsa_port *dp);
194 void dsa_port_link_unregister_of(struct dsa_port *dp);
195 int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
196 void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
197 extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
199 static inline bool dsa_port_offloads_netdev(struct dsa_port *dp,
200 struct net_device *dev)
202 /* Switchdev offloading can be configured on: */
204 if (dev == dp->slave)
205 /* DSA ports directly connected to a bridge, and event
206 * was emitted for the ports themselves.
210 if (dp->bridge_dev == dev)
211 /* DSA ports connected to a bridge, and event was emitted
216 if (dp->lag_dev == dev)
217 /* DSA ports connected to a bridge via a LAG */
223 /* Returns true if any port of this tree offloads the given net_device */
224 static inline bool dsa_tree_offloads_netdev(struct dsa_switch_tree *dst,
225 struct net_device *dev)
229 list_for_each_entry(dp, &dst->ports, list)
230 if (dsa_port_offloads_netdev(dp, dev))
237 extern const struct dsa_device_ops notag_netdev_ops;
238 void dsa_slave_mii_bus_init(struct dsa_switch *ds);
239 int dsa_slave_create(struct dsa_port *dp);
240 void dsa_slave_destroy(struct net_device *slave_dev);
241 int dsa_slave_suspend(struct net_device *slave_dev);
242 int dsa_slave_resume(struct net_device *slave_dev);
243 int dsa_slave_register_notifier(void);
244 void dsa_slave_unregister_notifier(void);
245 void dsa_slave_setup_tagger(struct net_device *slave);
246 int dsa_slave_change_mtu(struct net_device *dev, int new_mtu);
248 static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev)
250 struct dsa_slave_priv *p = netdev_priv(dev);
255 static inline struct net_device *
256 dsa_slave_to_master(const struct net_device *dev)
258 struct dsa_port *dp = dsa_slave_to_port(dev);
260 return dp->cpu_dp->master;
263 /* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
264 * frames as untagged, since the bridge will not untag them.
266 static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb)
268 struct dsa_port *dp = dsa_slave_to_port(skb->dev);
269 struct net_device *br = dp->bridge_dev;
270 struct net_device *dev = skb->dev;
271 struct net_device *upper_dev;
272 u16 vid, pvid, proto;
275 if (!br || br_vlan_enabled(br))
278 err = br_vlan_get_proto(br, &proto);
282 /* Move VLAN tag from data to hwaccel */
283 if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) {
284 skb = skb_vlan_untag(skb);
289 if (!skb_vlan_tag_present(skb))
292 vid = skb_vlan_tag_get_id(skb);
294 /* We already run under an RCU read-side critical section since
295 * we are called from netif_receive_skb_list_internal().
297 err = br_vlan_get_pvid_rcu(dev, &pvid);
304 /* The sad part about attempting to untag from DSA is that we
305 * don't know, unless we check, if the skb will end up in
306 * the bridge's data path - br_allowed_ingress() - or not.
307 * For example, there might be an 8021q upper for the
308 * default_pvid of the bridge, which will steal VLAN-tagged traffic
309 * from the bridge's data path. This is a configuration that DSA
310 * supports because vlan_filtering is 0. In that case, we should
311 * definitely keep the tag, to make sure it keeps working.
313 upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid);
317 __vlan_hwaccel_clear_tag(skb);
323 int dsa_switch_register_notifier(struct dsa_switch *ds);
324 void dsa_switch_unregister_notifier(struct dsa_switch *ds);
327 void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag);
328 void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag);
329 int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v);
330 int dsa_broadcast(unsigned long e, void *v);
331 int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
332 struct net_device *master,
333 const struct dsa_device_ops *tag_ops,
334 const struct dsa_device_ops *old_tag_ops);
336 extern struct list_head dsa_tree_list;