tjh.dev
Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * net/dsa/dsa_priv.h - Hardware switch handling
4 * Copyright (c) 2008-2009 Marvell Semiconductor
5 */
6
7#ifndef __DSA_PRIV_H
8#define __DSA_PRIV_H
9
10#include <linux/if_bridge.h>
11#include <linux/phy.h>
12#include <linux/netdevice.h>
13#include <linux/netpoll.h>
14#include <net/dsa.h>
15#include <net/gro_cells.h>
16
17enum {
18 DSA_NOTIFIER_AGEING_TIME,
19 DSA_NOTIFIER_BRIDGE_JOIN,
20 DSA_NOTIFIER_BRIDGE_LEAVE,
21 DSA_NOTIFIER_FDB_ADD,
22 DSA_NOTIFIER_FDB_DEL,
23 DSA_NOTIFIER_HOST_FDB_ADD,
24 DSA_NOTIFIER_HOST_FDB_DEL,
25 DSA_NOTIFIER_HSR_JOIN,
26 DSA_NOTIFIER_HSR_LEAVE,
27 DSA_NOTIFIER_LAG_CHANGE,
28 DSA_NOTIFIER_LAG_JOIN,
29 DSA_NOTIFIER_LAG_LEAVE,
30 DSA_NOTIFIER_MDB_ADD,
31 DSA_NOTIFIER_MDB_DEL,
32 DSA_NOTIFIER_HOST_MDB_ADD,
33 DSA_NOTIFIER_HOST_MDB_DEL,
34 DSA_NOTIFIER_VLAN_ADD,
35 DSA_NOTIFIER_VLAN_DEL,
36 DSA_NOTIFIER_MTU,
37 DSA_NOTIFIER_TAG_PROTO,
38 DSA_NOTIFIER_MRP_ADD,
39 DSA_NOTIFIER_MRP_DEL,
40 DSA_NOTIFIER_MRP_ADD_RING_ROLE,
41 DSA_NOTIFIER_MRP_DEL_RING_ROLE,
42};
43
44/* DSA_NOTIFIER_AGEING_TIME */
45struct dsa_notifier_ageing_time_info {
46 unsigned int ageing_time;
47};
48
49/* DSA_NOTIFIER_BRIDGE_* */
50struct dsa_notifier_bridge_info {
51 struct net_device *br;
52 int tree_index;
53 int sw_index;
54 int port;
55};
56
57/* DSA_NOTIFIER_FDB_* */
58struct dsa_notifier_fdb_info {
59 int sw_index;
60 int port;
61 const unsigned char *addr;
62 u16 vid;
63};
64
65/* DSA_NOTIFIER_MDB_* */
66struct dsa_notifier_mdb_info {
67 const struct switchdev_obj_port_mdb *mdb;
68 int sw_index;
69 int port;
70};
71
72/* DSA_NOTIFIER_LAG_* */
73struct dsa_notifier_lag_info {
74 struct net_device *lag;
75 int sw_index;
76 int port;
77
78 struct netdev_lag_upper_info *info;
79};
80
81/* DSA_NOTIFIER_VLAN_* */
82struct dsa_notifier_vlan_info {
83 const struct switchdev_obj_port_vlan *vlan;
84 int sw_index;
85 int port;
86 struct netlink_ext_ack *extack;
87};
88
89/* DSA_NOTIFIER_MTU */
90struct dsa_notifier_mtu_info {
91 bool targeted_match;
92 int sw_index;
93 int port;
94 int mtu;
95};
96
97/* DSA_NOTIFIER_TAG_PROTO_* */
98struct dsa_notifier_tag_proto_info {
99 const struct dsa_device_ops *tag_ops;
100};
101
102/* DSA_NOTIFIER_MRP_* */
103struct dsa_notifier_mrp_info {
104 const struct switchdev_obj_mrp *mrp;
105 int sw_index;
106 int port;
107};
108
109/* DSA_NOTIFIER_MRP_* */
110struct dsa_notifier_mrp_ring_role_info {
111 const struct switchdev_obj_ring_role_mrp *mrp;
112 int sw_index;
113 int port;
114};
115
116struct dsa_switchdev_event_work {
117 struct dsa_switch *ds;
118 int port;
119 struct net_device *dev;
120 struct work_struct work;
121 unsigned long event;
122 /* Specific for SWITCHDEV_FDB_ADD_TO_DEVICE and
123 * SWITCHDEV_FDB_DEL_TO_DEVICE
124 */
125 unsigned char addr[ETH_ALEN];
126 u16 vid;
127 bool host_addr;
128};
129
130/* DSA_NOTIFIER_HSR_* */
131struct dsa_notifier_hsr_info {
132 struct net_device *hsr;
133 int sw_index;
134 int port;
135};
136
137struct dsa_slave_priv {
138 /* Copy of CPU port xmit for faster access in slave transmit hot path */
139 struct sk_buff * (*xmit)(struct sk_buff *skb,
140 struct net_device *dev);
141
142 struct gro_cells gcells;
143
144 /* DSA port data, such as switch, port index, etc. */
145 struct dsa_port *dp;
146
147#ifdef CONFIG_NET_POLL_CONTROLLER
148 struct netpoll *netpoll;
149#endif
150
151 /* TC context */
152 struct list_head mall_tc_list;
153};
154
155/* dsa.c */
156const struct dsa_device_ops *dsa_tag_driver_get(int tag_protocol);
157void dsa_tag_driver_put(const struct dsa_device_ops *ops);
158const struct dsa_device_ops *dsa_find_tagger_by_name(const char *buf);
159
160bool dsa_schedule_work(struct work_struct *work);
161const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops);
162
163static inline int dsa_tag_protocol_overhead(const struct dsa_device_ops *ops)
164{
165 return ops->needed_headroom + ops->needed_tailroom;
166}
167
168/* master.c */
169int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp);
170void dsa_master_teardown(struct net_device *dev);
171
172static inline struct net_device *dsa_master_find_slave(struct net_device *dev,
173 int device, int port)
174{
175 struct dsa_port *cpu_dp = dev->dsa_ptr;
176 struct dsa_switch_tree *dst = cpu_dp->dst;
177 struct dsa_port *dp;
178
179 list_for_each_entry(dp, &dst->ports, list)
180 if (dp->ds->index == device && dp->index == port &&
181 dp->type == DSA_PORT_TYPE_USER)
182 return dp->slave;
183
184 return NULL;
185}
186
187/* port.c */
188void dsa_port_set_tag_protocol(struct dsa_port *cpu_dp,
189 const struct dsa_device_ops *tag_ops);
190int dsa_port_set_state(struct dsa_port *dp, u8 state);
191int dsa_port_enable_rt(struct dsa_port *dp, struct phy_device *phy);
192int dsa_port_enable(struct dsa_port *dp, struct phy_device *phy);
193void dsa_port_disable_rt(struct dsa_port *dp);
194void dsa_port_disable(struct dsa_port *dp);
195int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br,
196 struct netlink_ext_ack *extack);
197int dsa_port_pre_bridge_leave(struct dsa_port *dp, struct net_device *br,
198 struct netlink_ext_ack *extack);
199void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br);
200int dsa_port_lag_change(struct dsa_port *dp,
201 struct netdev_lag_lower_state_info *linfo);
202int dsa_port_lag_join(struct dsa_port *dp, struct net_device *lag_dev,
203 struct netdev_lag_upper_info *uinfo,
204 struct netlink_ext_ack *extack);
205int dsa_port_pre_lag_leave(struct dsa_port *dp, struct net_device *lag_dev,
206 struct netlink_ext_ack *extack);
207void dsa_port_lag_leave(struct dsa_port *dp, struct net_device *lag_dev);
208int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
209 struct netlink_ext_ack *extack);
210bool dsa_port_skip_vlan_configuration(struct dsa_port *dp);
211int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock);
212int dsa_port_mtu_change(struct dsa_port *dp, int new_mtu,
213 bool targeted_match);
214int dsa_port_fdb_add(struct dsa_port *dp, const unsigned char *addr,
215 u16 vid);
216int dsa_port_fdb_del(struct dsa_port *dp, const unsigned char *addr,
217 u16 vid);
218int dsa_port_host_fdb_add(struct dsa_port *dp, const unsigned char *addr,
219 u16 vid);
220int dsa_port_host_fdb_del(struct dsa_port *dp, const unsigned char *addr,
221 u16 vid);
222int dsa_port_fdb_dump(struct dsa_port *dp, dsa_fdb_dump_cb_t *cb, void *data);
223int dsa_port_mdb_add(const struct dsa_port *dp,
224 const struct switchdev_obj_port_mdb *mdb);
225int dsa_port_mdb_del(const struct dsa_port *dp,
226 const struct switchdev_obj_port_mdb *mdb);
227int dsa_port_host_mdb_add(const struct dsa_port *dp,
228 const struct switchdev_obj_port_mdb *mdb);
229int dsa_port_host_mdb_del(const struct dsa_port *dp,
230 const struct switchdev_obj_port_mdb *mdb);
231int dsa_port_pre_bridge_flags(const struct dsa_port *dp,
232 struct switchdev_brport_flags flags,
233 struct netlink_ext_ack *extack);
234int dsa_port_bridge_flags(const struct dsa_port *dp,
235 struct switchdev_brport_flags flags,
236 struct netlink_ext_ack *extack);
237int dsa_port_mrouter(struct dsa_port *dp, bool mrouter,
238 struct netlink_ext_ack *extack);
239int dsa_port_vlan_add(struct dsa_port *dp,
240 const struct switchdev_obj_port_vlan *vlan,
241 struct netlink_ext_ack *extack);
242int dsa_port_vlan_del(struct dsa_port *dp,
243 const struct switchdev_obj_port_vlan *vlan);
244int dsa_port_mrp_add(const struct dsa_port *dp,
245 const struct switchdev_obj_mrp *mrp);
246int dsa_port_mrp_del(const struct dsa_port *dp,
247 const struct switchdev_obj_mrp *mrp);
248int dsa_port_mrp_add_ring_role(const struct dsa_port *dp,
249 const struct switchdev_obj_ring_role_mrp *mrp);
250int dsa_port_mrp_del_ring_role(const struct dsa_port *dp,
251 const struct switchdev_obj_ring_role_mrp *mrp);
252int dsa_port_link_register_of(struct dsa_port *dp);
253void dsa_port_link_unregister_of(struct dsa_port *dp);
254int dsa_port_hsr_join(struct dsa_port *dp, struct net_device *hsr);
255void dsa_port_hsr_leave(struct dsa_port *dp, struct net_device *hsr);
256extern const struct phylink_mac_ops dsa_port_phylink_mac_ops;
257
258static inline bool dsa_port_offloads_bridge_port(struct dsa_port *dp,
259 struct net_device *dev)
260{
261 return dsa_port_to_bridge_port(dp) == dev;
262}
263
264static inline bool dsa_port_offloads_bridge(struct dsa_port *dp,
265 struct net_device *bridge_dev)
266{
267 /* DSA ports connected to a bridge, and event was emitted
268 * for the bridge.
269 */
270 return dp->bridge_dev == bridge_dev;
271}
272
273/* Returns true if any port of this tree offloads the given net_device */
274static inline bool dsa_tree_offloads_bridge_port(struct dsa_switch_tree *dst,
275 struct net_device *dev)
276{
277 struct dsa_port *dp;
278
279 list_for_each_entry(dp, &dst->ports, list)
280 if (dsa_port_offloads_bridge_port(dp, dev))
281 return true;
282
283 return false;
284}
285
286/* slave.c */
287extern const struct dsa_device_ops notag_netdev_ops;
288extern struct notifier_block dsa_slave_switchdev_notifier;
289extern struct notifier_block dsa_slave_switchdev_blocking_notifier;
290
291void dsa_slave_mii_bus_init(struct dsa_switch *ds);
292int dsa_slave_create(struct dsa_port *dp);
293void dsa_slave_destroy(struct net_device *slave_dev);
294int dsa_slave_suspend(struct net_device *slave_dev);
295int dsa_slave_resume(struct net_device *slave_dev);
296int dsa_slave_register_notifier(void);
297void dsa_slave_unregister_notifier(void);
298void dsa_slave_setup_tagger(struct net_device *slave);
299int dsa_slave_change_mtu(struct net_device *dev, int new_mtu);
300
301static inline struct dsa_port *dsa_slave_to_port(const struct net_device *dev)
302{
303 struct dsa_slave_priv *p = netdev_priv(dev);
304
305 return p->dp;
306}
307
308static inline struct net_device *
309dsa_slave_to_master(const struct net_device *dev)
310{
311 struct dsa_port *dp = dsa_slave_to_port(dev);
312
313 return dp->cpu_dp->master;
314}
315
316/* If under a bridge with vlan_filtering=0, make sure to send pvid-tagged
317 * frames as untagged, since the bridge will not untag them.
318 */
319static inline struct sk_buff *dsa_untag_bridge_pvid(struct sk_buff *skb)
320{
321 struct dsa_port *dp = dsa_slave_to_port(skb->dev);
322 struct net_device *br = dp->bridge_dev;
323 struct net_device *dev = skb->dev;
324 struct net_device *upper_dev;
325 u16 vid, pvid, proto;
326 int err;
327
328 if (!br || br_vlan_enabled(br))
329 return skb;
330
331 err = br_vlan_get_proto(br, &proto);
332 if (err)
333 return skb;
334
335 /* Move VLAN tag from data to hwaccel */
336 if (!skb_vlan_tag_present(skb) && skb->protocol == htons(proto)) {
337 skb = skb_vlan_untag(skb);
338 if (!skb)
339 return NULL;
340 }
341
342 if (!skb_vlan_tag_present(skb))
343 return skb;
344
345 vid = skb_vlan_tag_get_id(skb);
346
347 /* We already run under an RCU read-side critical section since
348 * we are called from netif_receive_skb_list_internal().
349 */
350 err = br_vlan_get_pvid_rcu(dev, &pvid);
351 if (err)
352 return skb;
353
354 if (vid != pvid)
355 return skb;
356
357 /* The sad part about attempting to untag from DSA is that we
358 * don't know, unless we check, if the skb will end up in
359 * the bridge's data path - br_allowed_ingress() - or not.
360 * For example, there might be an 8021q upper for the
361 * default_pvid of the bridge, which will steal VLAN-tagged traffic
362 * from the bridge's data path. This is a configuration that DSA
363 * supports because vlan_filtering is 0. In that case, we should
364 * definitely keep the tag, to make sure it keeps working.
365 */
366 upper_dev = __vlan_find_dev_deep_rcu(br, htons(proto), vid);
367 if (upper_dev)
368 return skb;
369
370 __vlan_hwaccel_clear_tag(skb);
371
372 return skb;
373}
374
375/* switch.c */
376int dsa_switch_register_notifier(struct dsa_switch *ds);
377void dsa_switch_unregister_notifier(struct dsa_switch *ds);
378
379/* dsa2.c */
380void dsa_lag_map(struct dsa_switch_tree *dst, struct net_device *lag);
381void dsa_lag_unmap(struct dsa_switch_tree *dst, struct net_device *lag);
382int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v);
383int dsa_broadcast(unsigned long e, void *v);
384int dsa_tree_change_tag_proto(struct dsa_switch_tree *dst,
385 struct net_device *master,
386 const struct dsa_device_ops *tag_ops,
387 const struct dsa_device_ops *old_tag_ops);
388
389extern struct list_head dsa_tree_list;
390
391#endif