aboutsummaryrefslogtreecommitdiffstats
path: root/net/dsa/switch.c
blob: 73746fa148f11466d03ca81efb8c4e890e836726 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
/*
 * Handling of a single switch chip, part of a switch fabric
 *
 * Copyright (c) 2017 Savoir-faire Linux Inc.
 *	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/netdevice.h>
#include <linux/notifier.h>
#include <net/switchdev.h>

#include "dsa_priv.h"

static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds,
						   unsigned int ageing_time)
{
	int i;

	for (i = 0; i < ds->num_ports; ++i) {
		struct dsa_port *dp = &ds->ports[i];

		if (dp->ageing_time && dp->ageing_time < ageing_time)
			ageing_time = dp->ageing_time;
	}

	return ageing_time;
}

static int dsa_switch_ageing_time(struct dsa_switch *ds,
				  struct dsa_notifier_ageing_time_info *info)
{
	unsigned int ageing_time = info->ageing_time;
	struct switchdev_trans *trans = info->trans;

	if (switchdev_trans_ph_prepare(trans)) {
		if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
			return -ERANGE;
		if (ds->ageing_time_max && ageing_time > ds->ageing_time_max)
			return -ERANGE;
		return 0;
	}

	/* Program the fastest ageing time in case of multiple bridges */
	ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time);

	if (ds->ops->set_ageing_time)
		return ds->ops->set_ageing_time(ds, ageing_time);

	return 0;
}

static int dsa_switch_bridge_join(struct dsa_switch *ds,
				  struct dsa_notifier_bridge_info *info)
{
	if (ds->index == info->sw_index && ds->ops->port_bridge_join)
		return ds->ops->port_bridge_join(ds, info->port, info->br);

	if (ds->index != info->sw_index && ds->ops->crosschip_bridge_join)
		return ds->ops->crosschip_bridge_join(ds, info->sw_index,
						      info->port, info->br);

	return 0;
}

static int dsa_switch_bridge_leave(struct dsa_switch *ds,
				   struct dsa_notifier_bridge_info *info)
{
	if (ds->index == info->sw_index && ds->ops->port_bridge_leave)
		ds->ops->port_bridge_leave(ds, info->port, info->br);

	if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave)
		ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port,
						info->br);

	return 0;
}

static int dsa_switch_fdb_add(struct dsa_switch *ds,
			      struct dsa_notifier_fdb_info *info)
{
	/* Do not care yet about other switch chips of the fabric */
	if (ds->index != info->sw_index)
		return 0;

	if (!ds->ops->port_fdb_add)
		return -EOPNOTSUPP;

	return ds->ops->port_fdb_add(ds, info->port, info->addr,
				     info->vid);
}

static int dsa_switch_fdb_del(struct dsa_switch *ds,
			      struct dsa_notifier_fdb_info *info)
{
	/* Do not care yet about other switch chips of the fabric */
	if (ds->index != info->sw_index)
		return 0;

	if (!ds->ops->port_fdb_del)
		return -EOPNOTSUPP;

	return ds->ops->port_fdb_del(ds, info->port, info->addr,
				     info->vid);
}

static int dsa_switch_mdb_add(struct dsa_switch *ds,
			      struct dsa_notifier_mdb_info *info)
{
	const struct switchdev_obj_port_mdb *mdb = info->mdb;
	struct switchdev_trans *trans = info->trans;
	DECLARE_BITMAP(group, ds->num_ports);
	int port, err;

	/* Build a mask of Multicast group members */
	bitmap_zero(group, ds->num_ports);
	if (ds->index == info->sw_index)
		set_bit(info->port, group);
	for (port = 0; port < ds->num_ports; port++)
		if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
			set_bit(port, group);

	if (switchdev_trans_ph_prepare(trans)) {
		if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add)
			return -EOPNOTSUPP;

		for_each_set_bit(port, group, ds->num_ports) {
			err = ds->ops->port_mdb_prepare(ds, port, mdb, trans);
			if (err)
				return err;
		}

		return 0;
	}

	for_each_set_bit(port, group, ds->num_ports)
		ds->ops->port_mdb_add(ds, port, mdb, trans);

	return 0;
}

static int dsa_switch_mdb_del(struct dsa_switch *ds,
			      struct dsa_notifier_mdb_info *info)
{
	const struct switchdev_obj_port_mdb *mdb = info->mdb;

	if (!ds->ops->port_mdb_del)
		return -EOPNOTSUPP;

	if (ds->index == info->sw_index)
		return ds->ops->port_mdb_del(ds, info->port, mdb);

	return 0;
}

static int dsa_switch_vlan_add(struct dsa_switch *ds,
			       struct dsa_notifier_vlan_info *info)
{
	const struct switchdev_obj_port_vlan *vlan = info->vlan;
	struct switchdev_trans *trans = info->trans;
	DECLARE_BITMAP(members, ds->num_ports);
	int port, err;

	/* Build a mask of VLAN members */
	bitmap_zero(members, ds->num_ports);
	if (ds->index == info->sw_index)
		set_bit(info->port, members);
	for (port = 0; port < ds->num_ports; port++)
		if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port))
			set_bit(port, members);

	if (switchdev_trans_ph_prepare(trans)) {
		if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add)
			return -EOPNOTSUPP;

		for_each_set_bit(port, members, ds->num_ports) {
			err = ds->ops->port_vlan_prepare(ds, port, vlan, trans);
			if (err)
				return err;
		}
	}

	for_each_set_bit(port, members, ds->num_ports)
		ds->ops->port_vlan_add(ds, port, vlan, trans);

	return 0;
}

static int dsa_switch_vlan_del(struct dsa_switch *ds,
			       struct dsa_notifier_vlan_info *info)
{
	const struct switchdev_obj_port_vlan *vlan = info->vlan;

	if (!ds->ops->port_vlan_del)
		return -EOPNOTSUPP;

	if (ds->index == info->sw_index)
		return ds->ops->port_vlan_del(ds, info->port, vlan);

	return 0;
}

static int dsa_switch_event(struct notifier_block *nb,
			    unsigned long event, void *info)
{
	struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb);
	int err;

	switch (event) {
	case DSA_NOTIFIER_AGEING_TIME:
		err = dsa_switch_ageing_time(ds, info);
		break;
	case DSA_NOTIFIER_BRIDGE_JOIN:
		err = dsa_switch_bridge_join(ds, info);
		break;
	case DSA_NOTIFIER_BRIDGE_LEAVE:
		err = dsa_switch_bridge_leave(ds, info);
		break;
	case DSA_NOTIFIER_FDB_ADD:
		err = dsa_switch_fdb_add(ds, info);
		break;
	case DSA_NOTIFIER_FDB_DEL:
		err = dsa_switch_fdb_del(ds, info);
		break;
	case DSA_NOTIFIER_MDB_ADD:
		err = dsa_switch_mdb_add(ds, info);
		break;
	case DSA_NOTIFIER_MDB_DEL:
		err = dsa_switch_mdb_del(ds, info);
		break;
	case DSA_NOTIFIER_VLAN_ADD:
		err = dsa_switch_vlan_add(ds, info);
		break;
	case DSA_NOTIFIER_VLAN_DEL:
		err = dsa_switch_vlan_del(ds, info);
		break;
	default:
		err = -EOPNOTSUPP;
		break;
	}

	/* Non-switchdev operations cannot be rolled back. If a DSA driver
	 * returns an error during the chained call, switch chips may be in an
	 * inconsistent state.
	 */
	if (err)
		dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n",
			event, err);

	return notifier_from_errno(err);
}

int dsa_switch_register_notifier(struct dsa_switch *ds)
{
	ds->nb.notifier_call = dsa_switch_event;

	return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
}

void dsa_switch_unregister_notifier(struct dsa_switch *ds)
{
	int err;

	err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb);
	if (err)
		dev_err(ds->dev, "failed to unregister notifier (%d)\n", err);
}

Privacy Policy