2 * Handling of a single switch port
4 * Copyright (c) 2017 Savoir-faire Linux Inc.
5 * Vivien Didelot <vivien.didelot@savoirfairelinux.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
13 #include <linux/if_bridge.h>
14 #include <linux/notifier.h>
18 static int dsa_port_notify(struct dsa_port *dp, unsigned long e, void *v)
20 struct raw_notifier_head *nh = &dp->ds->dst->nh;
23 err = raw_notifier_call_chain(nh, e, v);
25 return notifier_to_errno(err);
28 int dsa_port_set_state(struct dsa_port *dp, u8 state,
29 struct switchdev_trans *trans)
31 struct dsa_switch *ds = dp->ds;
34 if (switchdev_trans_ph_prepare(trans))
35 return ds->ops->port_stp_state_set ? 0 : -EOPNOTSUPP;
37 if (ds->ops->port_stp_state_set)
38 ds->ops->port_stp_state_set(ds, port, state);
40 if (ds->ops->port_fast_age) {
41 /* Fast age FDB entries or flush appropriate forwarding database
42 * for the given port, if we are moving it from Learning or
43 * Forwarding state, to Disabled or Blocking or Listening state.
46 if ((dp->stp_state == BR_STATE_LEARNING ||
47 dp->stp_state == BR_STATE_FORWARDING) &&
48 (state == BR_STATE_DISABLED ||
49 state == BR_STATE_BLOCKING ||
50 state == BR_STATE_LISTENING))
51 ds->ops->port_fast_age(ds, port);
54 dp->stp_state = state;
59 void dsa_port_set_state_now(struct dsa_port *dp, u8 state)
63 err = dsa_port_set_state(dp, state, NULL);
65 pr_err("DSA: failed to set STP state %u (%d)\n", state, err);
68 int dsa_port_bridge_join(struct dsa_port *dp, struct net_device *br)
70 struct dsa_notifier_bridge_info info = {
71 .sw_index = dp->ds->index,
77 /* Here the port is already bridged. Reflect the current configuration
78 * so that drivers can program their chips accordingly.
82 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_JOIN, &info);
84 /* The bridging is rolled back on error */
86 dp->bridge_dev = NULL;
91 void dsa_port_bridge_leave(struct dsa_port *dp, struct net_device *br)
93 struct dsa_notifier_bridge_info info = {
94 .sw_index = dp->ds->index,
100 /* Here the port is already unbridged. Reflect the current configuration
101 * so that drivers can program their chips accordingly.
103 dp->bridge_dev = NULL;
105 err = dsa_port_notify(dp, DSA_NOTIFIER_BRIDGE_LEAVE, &info);
107 pr_err("DSA: failed to notify DSA_NOTIFIER_BRIDGE_LEAVE\n");
109 /* Port left the bridge, put in BR_STATE_DISABLED by the bridge layer,
110 * so allow it to be in BR_STATE_FORWARDING to be kept functional
112 dsa_port_set_state_now(dp, BR_STATE_FORWARDING);
115 int dsa_port_vlan_filtering(struct dsa_port *dp, bool vlan_filtering,
116 struct switchdev_trans *trans)
118 struct dsa_switch *ds = dp->ds;
120 /* bridge skips -EOPNOTSUPP, so skip the prepare phase */
121 if (switchdev_trans_ph_prepare(trans))
124 if (ds->ops->port_vlan_filtering)
125 return ds->ops->port_vlan_filtering(ds, dp->index,
131 int dsa_port_ageing_time(struct dsa_port *dp, clock_t ageing_clock,
132 struct switchdev_trans *trans)
134 unsigned long ageing_jiffies = clock_t_to_jiffies(ageing_clock);
135 unsigned int ageing_time = jiffies_to_msecs(ageing_jiffies);
136 struct dsa_notifier_ageing_time_info info = {
137 .ageing_time = ageing_time,
138 .sw_index = dp->ds->index,
142 if (switchdev_trans_ph_prepare(trans))
143 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
145 dp->ageing_time = ageing_time;
147 return dsa_port_notify(dp, DSA_NOTIFIER_AGEING_TIME, &info);
150 int dsa_port_fdb_add(struct dsa_port *dp,
151 const struct switchdev_obj_port_fdb *fdb,
152 struct switchdev_trans *trans)
154 struct dsa_notifier_fdb_info info = {
155 .sw_index = dp->ds->index,
161 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
164 int dsa_port_fdb_del(struct dsa_port *dp,
165 const struct switchdev_obj_port_fdb *fdb)
167 struct dsa_notifier_fdb_info info = {
168 .sw_index = dp->ds->index,
173 return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
176 int dsa_port_fdb_dump(struct dsa_port *dp, struct switchdev_obj_port_fdb *fdb,
177 switchdev_obj_dump_cb_t *cb)
179 struct dsa_switch *ds = dp->ds;
181 if (ds->ops->port_fdb_dump)
182 return ds->ops->port_fdb_dump(ds, dp->index, fdb, cb);
187 int dsa_port_mdb_add(struct dsa_port *dp,
188 const struct switchdev_obj_port_mdb *mdb,
189 struct switchdev_trans *trans)
191 struct dsa_switch *ds = dp->ds;
193 if (switchdev_trans_ph_prepare(trans)) {
194 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
197 return ds->ops->port_mdb_prepare(ds, dp->index, mdb, trans);
200 ds->ops->port_mdb_add(ds, dp->index, mdb, trans);
205 int dsa_port_mdb_del(struct dsa_port *dp,
206 const struct switchdev_obj_port_mdb *mdb)
208 struct dsa_switch *ds = dp->ds;
210 if (ds->ops->port_mdb_del)
211 return ds->ops->port_mdb_del(ds, dp->index, mdb);
216 int dsa_port_mdb_dump(struct dsa_port *dp, struct switchdev_obj_port_mdb *mdb,
217 switchdev_obj_dump_cb_t *cb)
219 struct dsa_switch *ds = dp->ds;
221 if (ds->ops->port_mdb_dump)
222 return ds->ops->port_mdb_dump(ds, dp->index, mdb, cb);
227 int dsa_port_vlan_add(struct dsa_port *dp,
228 const struct switchdev_obj_port_vlan *vlan,
229 struct switchdev_trans *trans)
231 struct dsa_switch *ds = dp->ds;
233 if (switchdev_trans_ph_prepare(trans)) {
234 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
237 return ds->ops->port_vlan_prepare(ds, dp->index, vlan, trans);
240 ds->ops->port_vlan_add(ds, dp->index, vlan, trans);
245 int dsa_port_vlan_del(struct dsa_port *dp,
246 const struct switchdev_obj_port_vlan *vlan)
248 struct dsa_switch *ds = dp->ds;
250 if (!ds->ops->port_vlan_del)
253 return ds->ops->port_vlan_del(ds, dp->index, vlan);
256 int dsa_port_vlan_dump(struct dsa_port *dp,
257 struct switchdev_obj_port_vlan *vlan,
258 switchdev_obj_dump_cb_t *cb)
260 struct dsa_switch *ds = dp->ds;
262 if (ds->ops->port_vlan_dump)
263 return ds->ops->port_vlan_dump(ds, dp->index, vlan, cb);