2 * Handling of a single switch chip, part of a switch fabric
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/netdevice.h>
14 #include <linux/notifier.h>
15 #include <net/switchdev.h>
19 static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds,
20 unsigned int ageing_time)
24 for (i = 0; i < ds->num_ports; ++i) {
25 struct dsa_port *dp = &ds->ports[i];
27 if (dp->ageing_time && dp->ageing_time < ageing_time)
28 ageing_time = dp->ageing_time;
34 static int dsa_switch_ageing_time(struct dsa_switch *ds,
35 struct dsa_notifier_ageing_time_info *info)
37 unsigned int ageing_time = info->ageing_time;
38 struct switchdev_trans *trans = info->trans;
40 if (switchdev_trans_ph_prepare(trans)) {
41 if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
43 if (ds->ageing_time_max && ageing_time > ds->ageing_time_max)
48 /* Program the fastest ageing time in case of multiple bridges */
49 ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time);
51 if (ds->ops->set_ageing_time)
52 return ds->ops->set_ageing_time(ds, ageing_time);
57 static int dsa_switch_bridge_join(struct dsa_switch *ds,
58 struct dsa_notifier_bridge_info *info)
60 if (ds->index == info->sw_index && ds->ops->port_bridge_join)
61 return ds->ops->port_bridge_join(ds, info->port, info->br);
63 if (ds->index != info->sw_index && ds->ops->crosschip_bridge_join)
64 return ds->ops->crosschip_bridge_join(ds, info->sw_index,
65 info->port, info->br);
70 static int dsa_switch_bridge_leave(struct dsa_switch *ds,
71 struct dsa_notifier_bridge_info *info)
73 if (ds->index == info->sw_index && ds->ops->port_bridge_leave)
74 ds->ops->port_bridge_leave(ds, info->port, info->br);
76 if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave)
77 ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port,
83 static int dsa_switch_fdb_add(struct dsa_switch *ds,
84 struct dsa_notifier_fdb_info *info)
86 const struct switchdev_obj_port_fdb *fdb = info->fdb;
87 struct switchdev_trans *trans = info->trans;
89 /* Do not care yet about other switch chips of the fabric */
90 if (ds->index != info->sw_index)
93 if (switchdev_trans_ph_prepare(trans)) {
94 if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add)
97 return ds->ops->port_fdb_prepare(ds, info->port, fdb, trans);
100 ds->ops->port_fdb_add(ds, info->port, fdb, trans);
105 static int dsa_switch_fdb_del(struct dsa_switch *ds,
106 struct dsa_notifier_fdb_info *info)
108 const struct switchdev_obj_port_fdb *fdb = info->fdb;
110 /* Do not care yet about other switch chips of the fabric */
111 if (ds->index != info->sw_index)
114 if (!ds->ops->port_fdb_del)
117 return ds->ops->port_fdb_del(ds, info->port, fdb);
120 static int dsa_switch_mdb_add(struct dsa_switch *ds,
121 struct dsa_notifier_mdb_info *info)
123 const struct switchdev_obj_port_mdb *mdb = info->mdb;
124 struct switchdev_trans *trans = info->trans;
125 DECLARE_BITMAP(group, ds->num_ports);
128 /* Build a mask of Multicast group members */
129 bitmap_zero(group, ds->num_ports);
130 if (ds->index == info->sw_index)
131 set_bit(info->port, group);
132 for (port = 0; port < ds->num_ports; port++)
133 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
134 set_bit(port, group);
136 if (switchdev_trans_ph_prepare(trans)) {
137 if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
140 for_each_set_bit(port, group, ds->num_ports) {
141 err = ds->ops->port_mdb_prepare(ds, port, mdb, trans);
147 for_each_set_bit(port, group, ds->num_ports)
148 ds->ops->port_mdb_add(ds, port, mdb, trans);
153 static int dsa_switch_mdb_del(struct dsa_switch *ds,
154 struct dsa_notifier_mdb_info *info)
156 const struct switchdev_obj_port_mdb *mdb = info->mdb;
158 if (!ds->ops->port_mdb_del)
161 if (ds->index == info->sw_index)
162 return ds->ops->port_mdb_del(ds, info->port, mdb);
167 static int dsa_switch_vlan_add(struct dsa_switch *ds,
168 struct dsa_notifier_vlan_info *info)
170 const struct switchdev_obj_port_vlan *vlan = info->vlan;
171 struct switchdev_trans *trans = info->trans;
172 DECLARE_BITMAP(members, ds->num_ports);
175 /* Build a mask of VLAN members */
176 bitmap_zero(members, ds->num_ports);
177 if (ds->index == info->sw_index)
178 set_bit(info->port, members);
179 for (port = 0; port < ds->num_ports; port++)
180 if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
181 set_bit(port, members);
183 if (switchdev_trans_ph_prepare(trans)) {
184 if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
187 for_each_set_bit(port, members, ds->num_ports) {
188 err = ds->ops->port_vlan_prepare(ds, port, vlan, trans);
194 for_each_set_bit(port, members, ds->num_ports)
195 ds->ops->port_vlan_add(ds, port, vlan, trans);
200 static int dsa_switch_vlan_del(struct dsa_switch *ds,
201 struct dsa_notifier_vlan_info *info)
203 const struct switchdev_obj_port_vlan *vlan = info->vlan;
205 if (!ds->ops->port_vlan_del)
208 if (ds->index == info->sw_index)
209 return ds->ops->port_vlan_del(ds, info->port, vlan);
214 static int dsa_switch_event(struct notifier_block *nb,
215 unsigned long event, void *info)
217 struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
221 case DSA_NOTIFIER_AGEING_TIME:
222 err = dsa_switch_ageing_time(ds, info);
224 case DSA_NOTIFIER_BRIDGE_JOIN:
225 err = dsa_switch_bridge_join(ds, info);
227 case DSA_NOTIFIER_BRIDGE_LEAVE:
228 err = dsa_switch_bridge_leave(ds, info);
230 case DSA_NOTIFIER_FDB_ADD:
231 err = dsa_switch_fdb_add(ds, info);
233 case DSA_NOTIFIER_FDB_DEL:
234 err = dsa_switch_fdb_del(ds, info);
236 case DSA_NOTIFIER_MDB_ADD:
237 err = dsa_switch_mdb_add(ds, info);
239 case DSA_NOTIFIER_MDB_DEL:
240 err = dsa_switch_mdb_del(ds, info);
242 case DSA_NOTIFIER_VLAN_ADD:
243 err = dsa_switch_vlan_add(ds, info);
245 case DSA_NOTIFIER_VLAN_DEL:
246 err = dsa_switch_vlan_del(ds, info);
253 /* Non-switchdev operations cannot be rolled back. If a DSA driver
254 * returns an error during the chained call, switch chips may be in an
255 * inconsistent state.
258 dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
261 return notifier_from_errno(err);
264 int dsa_switch_register_notifier(struct dsa_switch *ds)
266 ds->nb.notifier_call = dsa_switch_event;
268 return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
271 void dsa_switch_unregister_notifier(struct dsa_switch *ds)
275 err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb);
277 dev_err(ds->dev, "failed to unregister notifier (%d)\n", err);