Merge tag 'drm-next-2018-11-02' of git://anongit.freedesktop.org/drm/drm
[linux-2.6-microblaze.git] / include / net / switchdev.h
1 /*
2  * include/net/switchdev.h - Switch device API
3  * Copyright (c) 2014-2015 Jiri Pirko <jiri@resnulli.us>
4  * Copyright (c) 2014-2015 Scott Feldman <sfeldma@gmail.com>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  */
11 #ifndef _LINUX_SWITCHDEV_H_
12 #define _LINUX_SWITCHDEV_H_
13
14 #include <linux/netdevice.h>
15 #include <linux/notifier.h>
16 #include <linux/list.h>
17 #include <net/ip_fib.h>
18
19 #define SWITCHDEV_F_NO_RECURSE          BIT(0)
20 #define SWITCHDEV_F_SKIP_EOPNOTSUPP     BIT(1)
21 #define SWITCHDEV_F_DEFER               BIT(2)
22
23 struct switchdev_trans_item {
24         struct list_head list;
25         void *data;
26         void (*destructor)(const void *data);
27 };
28
29 struct switchdev_trans {
30         struct list_head item_list;
31         bool ph_prepare;
32 };
33
34 static inline bool switchdev_trans_ph_prepare(struct switchdev_trans *trans)
35 {
36         return trans && trans->ph_prepare;
37 }
38
39 static inline bool switchdev_trans_ph_commit(struct switchdev_trans *trans)
40 {
41         return trans && !trans->ph_prepare;
42 }
43
44 enum switchdev_attr_id {
45         SWITCHDEV_ATTR_ID_UNDEFINED,
46         SWITCHDEV_ATTR_ID_PORT_PARENT_ID,
47         SWITCHDEV_ATTR_ID_PORT_STP_STATE,
48         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS,
49         SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS_SUPPORT,
50         SWITCHDEV_ATTR_ID_PORT_MROUTER,
51         SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME,
52         SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING,
53         SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED,
54         SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
55 };
56
57 struct switchdev_attr {
58         struct net_device *orig_dev;
59         enum switchdev_attr_id id;
60         u32 flags;
61         void *complete_priv;
62         void (*complete)(struct net_device *dev, int err, void *priv);
63         union {
64                 struct netdev_phys_item_id ppid;        /* PORT_PARENT_ID */
65                 u8 stp_state;                           /* PORT_STP_STATE */
66                 unsigned long brport_flags;             /* PORT_BRIDGE_FLAGS */
67                 unsigned long brport_flags_support;     /* PORT_BRIDGE_FLAGS_SUPPORT */
68                 bool mrouter;                           /* PORT_MROUTER */
69                 clock_t ageing_time;                    /* BRIDGE_AGEING_TIME */
70                 bool vlan_filtering;                    /* BRIDGE_VLAN_FILTERING */
71                 bool mc_disabled;                       /* MC_DISABLED */
72         } u;
73 };
74
75 enum switchdev_obj_id {
76         SWITCHDEV_OBJ_ID_UNDEFINED,
77         SWITCHDEV_OBJ_ID_PORT_VLAN,
78         SWITCHDEV_OBJ_ID_PORT_MDB,
79         SWITCHDEV_OBJ_ID_HOST_MDB,
80 };
81
82 struct switchdev_obj {
83         struct net_device *orig_dev;
84         enum switchdev_obj_id id;
85         u32 flags;
86         void *complete_priv;
87         void (*complete)(struct net_device *dev, int err, void *priv);
88 };
89
90 /* SWITCHDEV_OBJ_ID_PORT_VLAN */
91 struct switchdev_obj_port_vlan {
92         struct switchdev_obj obj;
93         u16 flags;
94         u16 vid_begin;
95         u16 vid_end;
96 };
97
98 #define SWITCHDEV_OBJ_PORT_VLAN(obj) \
99         container_of(obj, struct switchdev_obj_port_vlan, obj)
100
101 /* SWITCHDEV_OBJ_ID_PORT_MDB */
102 struct switchdev_obj_port_mdb {
103         struct switchdev_obj obj;
104         unsigned char addr[ETH_ALEN];
105         u16 vid;
106 };
107
108 #define SWITCHDEV_OBJ_PORT_MDB(obj) \
109         container_of(obj, struct switchdev_obj_port_mdb, obj)
110
111 void switchdev_trans_item_enqueue(struct switchdev_trans *trans,
112                                   void *data, void (*destructor)(void const *),
113                                   struct switchdev_trans_item *tritem);
114 void *switchdev_trans_item_dequeue(struct switchdev_trans *trans);
115
116 typedef int switchdev_obj_dump_cb_t(struct switchdev_obj *obj);
117
118 /**
119  * struct switchdev_ops - switchdev operations
120  *
121  * @switchdev_port_attr_get: Get a port attribute (see switchdev_attr).
122  *
123  * @switchdev_port_attr_set: Set a port attribute (see switchdev_attr).
124  *
125  * @switchdev_port_obj_add: Add an object to port (see switchdev_obj_*).
126  *
127  * @switchdev_port_obj_del: Delete an object from port (see switchdev_obj_*).
128  */
129 struct switchdev_ops {
130         int     (*switchdev_port_attr_get)(struct net_device *dev,
131                                            struct switchdev_attr *attr);
132         int     (*switchdev_port_attr_set)(struct net_device *dev,
133                                            const struct switchdev_attr *attr,
134                                            struct switchdev_trans *trans);
135         int     (*switchdev_port_obj_add)(struct net_device *dev,
136                                           const struct switchdev_obj *obj,
137                                           struct switchdev_trans *trans);
138         int     (*switchdev_port_obj_del)(struct net_device *dev,
139                                           const struct switchdev_obj *obj);
140 };
141
142 enum switchdev_notifier_type {
143         SWITCHDEV_FDB_ADD_TO_BRIDGE = 1,
144         SWITCHDEV_FDB_DEL_TO_BRIDGE,
145         SWITCHDEV_FDB_ADD_TO_DEVICE,
146         SWITCHDEV_FDB_DEL_TO_DEVICE,
147         SWITCHDEV_FDB_OFFLOADED,
148
149         SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE,
150         SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE,
151         SWITCHDEV_VXLAN_FDB_OFFLOADED,
152 };
153
154 struct switchdev_notifier_info {
155         struct net_device *dev;
156 };
157
158 struct switchdev_notifier_fdb_info {
159         struct switchdev_notifier_info info; /* must be first */
160         const unsigned char *addr;
161         u16 vid;
162         u8 added_by_user:1,
163            offloaded:1;
164 };
165
166 static inline struct net_device *
167 switchdev_notifier_info_to_dev(const struct switchdev_notifier_info *info)
168 {
169         return info->dev;
170 }
171
172 #ifdef CONFIG_NET_SWITCHDEV
173
174 void switchdev_deferred_process(void);
175 int switchdev_port_attr_get(struct net_device *dev,
176                             struct switchdev_attr *attr);
177 int switchdev_port_attr_set(struct net_device *dev,
178                             const struct switchdev_attr *attr);
179 int switchdev_port_obj_add(struct net_device *dev,
180                            const struct switchdev_obj *obj);
181 int switchdev_port_obj_del(struct net_device *dev,
182                            const struct switchdev_obj *obj);
183 int register_switchdev_notifier(struct notifier_block *nb);
184 int unregister_switchdev_notifier(struct notifier_block *nb);
185 int call_switchdev_notifiers(unsigned long val, struct net_device *dev,
186                              struct switchdev_notifier_info *info);
187 void switchdev_port_fwd_mark_set(struct net_device *dev,
188                                  struct net_device *group_dev,
189                                  bool joining);
190
191 bool switchdev_port_same_parent_id(struct net_device *a,
192                                    struct net_device *b);
193
194 #define SWITCHDEV_SET_OPS(netdev, ops) ((netdev)->switchdev_ops = (ops))
195 #else
196
197 static inline void switchdev_deferred_process(void)
198 {
199 }
200
201 static inline int switchdev_port_attr_get(struct net_device *dev,
202                                           struct switchdev_attr *attr)
203 {
204         return -EOPNOTSUPP;
205 }
206
207 static inline int switchdev_port_attr_set(struct net_device *dev,
208                                           const struct switchdev_attr *attr)
209 {
210         return -EOPNOTSUPP;
211 }
212
213 static inline int switchdev_port_obj_add(struct net_device *dev,
214                                          const struct switchdev_obj *obj)
215 {
216         return -EOPNOTSUPP;
217 }
218
219 static inline int switchdev_port_obj_del(struct net_device *dev,
220                                          const struct switchdev_obj *obj)
221 {
222         return -EOPNOTSUPP;
223 }
224
225 static inline int register_switchdev_notifier(struct notifier_block *nb)
226 {
227         return 0;
228 }
229
230 static inline int unregister_switchdev_notifier(struct notifier_block *nb)
231 {
232         return 0;
233 }
234
235 static inline int call_switchdev_notifiers(unsigned long val,
236                                            struct net_device *dev,
237                                            struct switchdev_notifier_info *info)
238 {
239         return NOTIFY_DONE;
240 }
241
242 static inline bool switchdev_port_same_parent_id(struct net_device *a,
243                                                  struct net_device *b)
244 {
245         return false;
246 }
247
248 #define SWITCHDEV_SET_OPS(netdev, ops) do {} while (0)
249
250 #endif
251
252 #endif /* _LINUX_SWITCHDEV_H_ */