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f515f192 VD |
1 | /* |
2 | * Handling of a single switch chip, part of a switch fabric | |
3 | * | |
4333d619 VD |
4 | * Copyright (c) 2017 Savoir-faire Linux Inc. |
5 | * Vivien Didelot <vivien.didelot@savoirfairelinux.com> | |
f515f192 VD |
6 | * |
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. | |
11 | */ | |
12 | ||
13 | #include <linux/netdevice.h> | |
14 | #include <linux/notifier.h> | |
1faabf74 | 15 | #include <net/switchdev.h> |
ea5dd34b VD |
16 | |
17 | #include "dsa_priv.h" | |
f515f192 | 18 | |
1faabf74 VD |
19 | static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds, |
20 | unsigned int ageing_time) | |
21 | { | |
22 | int i; | |
23 | ||
24 | for (i = 0; i < ds->num_ports; ++i) { | |
25 | struct dsa_port *dp = &ds->ports[i]; | |
26 | ||
27 | if (dp->ageing_time && dp->ageing_time < ageing_time) | |
28 | ageing_time = dp->ageing_time; | |
29 | } | |
30 | ||
31 | return ageing_time; | |
32 | } | |
33 | ||
34 | static int dsa_switch_ageing_time(struct dsa_switch *ds, | |
35 | struct dsa_notifier_ageing_time_info *info) | |
36 | { | |
37 | unsigned int ageing_time = info->ageing_time; | |
38 | struct switchdev_trans *trans = info->trans; | |
39 | ||
1faabf74 VD |
40 | if (switchdev_trans_ph_prepare(trans)) { |
41 | if (ds->ageing_time_min && ageing_time < ds->ageing_time_min) | |
42 | return -ERANGE; | |
43 | if (ds->ageing_time_max && ageing_time > ds->ageing_time_max) | |
44 | return -ERANGE; | |
45 | return 0; | |
46 | } | |
47 | ||
48 | /* Program the fastest ageing time in case of multiple bridges */ | |
49 | ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time); | |
50 | ||
51 | if (ds->ops->set_ageing_time) | |
52 | return ds->ops->set_ageing_time(ds, ageing_time); | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
04d3a4c6 VD |
57 | static int dsa_switch_bridge_join(struct dsa_switch *ds, |
58 | struct dsa_notifier_bridge_info *info) | |
59 | { | |
60 | if (ds->index == info->sw_index && ds->ops->port_bridge_join) | |
61 | return ds->ops->port_bridge_join(ds, info->port, info->br); | |
62 | ||
40ef2c93 VD |
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); | |
04d3a4c6 VD |
66 | |
67 | return 0; | |
68 | } | |
69 | ||
70 | static int dsa_switch_bridge_leave(struct dsa_switch *ds, | |
71 | struct dsa_notifier_bridge_info *info) | |
72 | { | |
73 | if (ds->index == info->sw_index && ds->ops->port_bridge_leave) | |
74 | ds->ops->port_bridge_leave(ds, info->port, info->br); | |
75 | ||
40ef2c93 VD |
76 | if (ds->index != info->sw_index && ds->ops->crosschip_bridge_leave) |
77 | ds->ops->crosschip_bridge_leave(ds, info->sw_index, info->port, | |
78 | info->br); | |
04d3a4c6 VD |
79 | |
80 | return 0; | |
81 | } | |
82 | ||
685fb6a4 VD |
83 | static int dsa_switch_fdb_add(struct dsa_switch *ds, |
84 | struct dsa_notifier_fdb_info *info) | |
85 | { | |
685fb6a4 VD |
86 | /* Do not care yet about other switch chips of the fabric */ |
87 | if (ds->index != info->sw_index) | |
88 | return 0; | |
89 | ||
1b6dd556 AS |
90 | if (!ds->ops->port_fdb_add) |
91 | return -EOPNOTSUPP; | |
685fb6a4 | 92 | |
2acf4e6a AS |
93 | return ds->ops->port_fdb_add(ds, info->port, info->addr, |
94 | info->vid); | |
685fb6a4 VD |
95 | } |
96 | ||
97 | static int dsa_switch_fdb_del(struct dsa_switch *ds, | |
98 | struct dsa_notifier_fdb_info *info) | |
99 | { | |
685fb6a4 VD |
100 | /* Do not care yet about other switch chips of the fabric */ |
101 | if (ds->index != info->sw_index) | |
102 | return 0; | |
103 | ||
104 | if (!ds->ops->port_fdb_del) | |
105 | return -EOPNOTSUPP; | |
106 | ||
2acf4e6a AS |
107 | return ds->ops->port_fdb_del(ds, info->port, info->addr, |
108 | info->vid); | |
685fb6a4 VD |
109 | } |
110 | ||
8ae5bcdc VD |
111 | static int dsa_switch_mdb_add(struct dsa_switch *ds, |
112 | struct dsa_notifier_mdb_info *info) | |
113 | { | |
114 | const struct switchdev_obj_port_mdb *mdb = info->mdb; | |
115 | struct switchdev_trans *trans = info->trans; | |
a1a6b7ea VD |
116 | DECLARE_BITMAP(group, ds->num_ports); |
117 | int port, err; | |
8ae5bcdc | 118 | |
a1a6b7ea VD |
119 | /* Build a mask of Multicast group members */ |
120 | bitmap_zero(group, ds->num_ports); | |
121 | if (ds->index == info->sw_index) | |
122 | set_bit(info->port, group); | |
123 | for (port = 0; port < ds->num_ports; port++) | |
124 | if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) | |
125 | set_bit(port, group); | |
8ae5bcdc VD |
126 | |
127 | if (switchdev_trans_ph_prepare(trans)) { | |
128 | if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) | |
129 | return -EOPNOTSUPP; | |
130 | ||
a1a6b7ea VD |
131 | for_each_set_bit(port, group, ds->num_ports) { |
132 | err = ds->ops->port_mdb_prepare(ds, port, mdb, trans); | |
133 | if (err) | |
134 | return err; | |
135 | } | |
b0b38a1c VD |
136 | |
137 | return 0; | |
8ae5bcdc VD |
138 | } |
139 | ||
a1a6b7ea VD |
140 | for_each_set_bit(port, group, ds->num_ports) |
141 | ds->ops->port_mdb_add(ds, port, mdb, trans); | |
8ae5bcdc VD |
142 | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static int dsa_switch_mdb_del(struct dsa_switch *ds, | |
147 | struct dsa_notifier_mdb_info *info) | |
148 | { | |
149 | const struct switchdev_obj_port_mdb *mdb = info->mdb; | |
150 | ||
8ae5bcdc VD |
151 | if (!ds->ops->port_mdb_del) |
152 | return -EOPNOTSUPP; | |
153 | ||
a1a6b7ea VD |
154 | if (ds->index == info->sw_index) |
155 | return ds->ops->port_mdb_del(ds, info->port, mdb); | |
156 | ||
157 | return 0; | |
8ae5bcdc VD |
158 | } |
159 | ||
d0c627b8 VD |
160 | static int dsa_switch_vlan_add(struct dsa_switch *ds, |
161 | struct dsa_notifier_vlan_info *info) | |
162 | { | |
163 | const struct switchdev_obj_port_vlan *vlan = info->vlan; | |
164 | struct switchdev_trans *trans = info->trans; | |
1ca4aa9c VD |
165 | DECLARE_BITMAP(members, ds->num_ports); |
166 | int port, err; | |
d0c627b8 | 167 | |
1ca4aa9c VD |
168 | /* Build a mask of VLAN members */ |
169 | bitmap_zero(members, ds->num_ports); | |
170 | if (ds->index == info->sw_index) | |
171 | set_bit(info->port, members); | |
b2f81d30 VD |
172 | for (port = 0; port < ds->num_ports; port++) |
173 | if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) | |
174 | set_bit(port, members); | |
d0c627b8 VD |
175 | |
176 | if (switchdev_trans_ph_prepare(trans)) { | |
177 | if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) | |
178 | return -EOPNOTSUPP; | |
179 | ||
1ca4aa9c VD |
180 | for_each_set_bit(port, members, ds->num_ports) { |
181 | err = ds->ops->port_vlan_prepare(ds, port, vlan, trans); | |
182 | if (err) | |
183 | return err; | |
184 | } | |
2118df93 VD |
185 | |
186 | return 0; | |
d0c627b8 VD |
187 | } |
188 | ||
1ca4aa9c VD |
189 | for_each_set_bit(port, members, ds->num_ports) |
190 | ds->ops->port_vlan_add(ds, port, vlan, trans); | |
d0c627b8 VD |
191 | |
192 | return 0; | |
193 | } | |
194 | ||
195 | static int dsa_switch_vlan_del(struct dsa_switch *ds, | |
196 | struct dsa_notifier_vlan_info *info) | |
197 | { | |
198 | const struct switchdev_obj_port_vlan *vlan = info->vlan; | |
199 | ||
d0c627b8 VD |
200 | if (!ds->ops->port_vlan_del) |
201 | return -EOPNOTSUPP; | |
202 | ||
1ca4aa9c VD |
203 | if (ds->index == info->sw_index) |
204 | return ds->ops->port_vlan_del(ds, info->port, vlan); | |
205 | ||
206 | return 0; | |
d0c627b8 VD |
207 | } |
208 | ||
f515f192 VD |
209 | static int dsa_switch_event(struct notifier_block *nb, |
210 | unsigned long event, void *info) | |
211 | { | |
212 | struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb); | |
213 | int err; | |
214 | ||
215 | switch (event) { | |
1faabf74 VD |
216 | case DSA_NOTIFIER_AGEING_TIME: |
217 | err = dsa_switch_ageing_time(ds, info); | |
218 | break; | |
04d3a4c6 VD |
219 | case DSA_NOTIFIER_BRIDGE_JOIN: |
220 | err = dsa_switch_bridge_join(ds, info); | |
221 | break; | |
222 | case DSA_NOTIFIER_BRIDGE_LEAVE: | |
223 | err = dsa_switch_bridge_leave(ds, info); | |
224 | break; | |
685fb6a4 VD |
225 | case DSA_NOTIFIER_FDB_ADD: |
226 | err = dsa_switch_fdb_add(ds, info); | |
227 | break; | |
228 | case DSA_NOTIFIER_FDB_DEL: | |
229 | err = dsa_switch_fdb_del(ds, info); | |
230 | break; | |
8ae5bcdc VD |
231 | case DSA_NOTIFIER_MDB_ADD: |
232 | err = dsa_switch_mdb_add(ds, info); | |
233 | break; | |
234 | case DSA_NOTIFIER_MDB_DEL: | |
235 | err = dsa_switch_mdb_del(ds, info); | |
236 | break; | |
d0c627b8 VD |
237 | case DSA_NOTIFIER_VLAN_ADD: |
238 | err = dsa_switch_vlan_add(ds, info); | |
239 | break; | |
240 | case DSA_NOTIFIER_VLAN_DEL: | |
241 | err = dsa_switch_vlan_del(ds, info); | |
242 | break; | |
f515f192 VD |
243 | default: |
244 | err = -EOPNOTSUPP; | |
245 | break; | |
246 | } | |
247 | ||
248 | /* Non-switchdev operations cannot be rolled back. If a DSA driver | |
249 | * returns an error during the chained call, switch chips may be in an | |
250 | * inconsistent state. | |
251 | */ | |
252 | if (err) | |
253 | dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n", | |
254 | event, err); | |
255 | ||
256 | return notifier_from_errno(err); | |
257 | } | |
258 | ||
259 | int dsa_switch_register_notifier(struct dsa_switch *ds) | |
260 | { | |
261 | ds->nb.notifier_call = dsa_switch_event; | |
262 | ||
263 | return raw_notifier_chain_register(&ds->dst->nh, &ds->nb); | |
264 | } | |
265 | ||
266 | void dsa_switch_unregister_notifier(struct dsa_switch *ds) | |
267 | { | |
268 | int err; | |
269 | ||
270 | err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb); | |
271 | if (err) | |
272 | dev_err(ds->dev, "failed to unregister notifier (%d)\n", err); | |
273 | } |