Commit | Line | Data |
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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 | { | |
3169241f | 86 | int port = dsa_towards_port(ds, info->sw_index, info->port); |
685fb6a4 | 87 | |
1b6dd556 AS |
88 | if (!ds->ops->port_fdb_add) |
89 | return -EOPNOTSUPP; | |
685fb6a4 | 90 | |
3169241f | 91 | return ds->ops->port_fdb_add(ds, port, info->addr, info->vid); |
685fb6a4 VD |
92 | } |
93 | ||
94 | static int dsa_switch_fdb_del(struct dsa_switch *ds, | |
95 | struct dsa_notifier_fdb_info *info) | |
96 | { | |
3169241f | 97 | int port = dsa_towards_port(ds, info->sw_index, info->port); |
685fb6a4 VD |
98 | |
99 | if (!ds->ops->port_fdb_del) | |
100 | return -EOPNOTSUPP; | |
101 | ||
3169241f | 102 | return ds->ops->port_fdb_del(ds, port, info->addr, info->vid); |
685fb6a4 VD |
103 | } |
104 | ||
e6db98db VD |
105 | static int |
106 | dsa_switch_mdb_prepare_bitmap(struct dsa_switch *ds, | |
107 | const struct switchdev_obj_port_mdb *mdb, | |
108 | const unsigned long *bitmap) | |
109 | { | |
110 | int port, err; | |
111 | ||
112 | if (!ds->ops->port_mdb_prepare || !ds->ops->port_mdb_add) | |
113 | return -EOPNOTSUPP; | |
114 | ||
115 | for_each_set_bit(port, bitmap, ds->num_ports) { | |
116 | err = ds->ops->port_mdb_prepare(ds, port, mdb); | |
117 | if (err) | |
118 | return err; | |
119 | } | |
120 | ||
121 | return 0; | |
122 | } | |
123 | ||
124 | static void dsa_switch_mdb_add_bitmap(struct dsa_switch *ds, | |
125 | const struct switchdev_obj_port_mdb *mdb, | |
126 | const unsigned long *bitmap) | |
127 | { | |
128 | int port; | |
129 | ||
130 | for_each_set_bit(port, bitmap, ds->num_ports) | |
131 | ds->ops->port_mdb_add(ds, port, mdb); | |
132 | } | |
133 | ||
8ae5bcdc VD |
134 | static int dsa_switch_mdb_add(struct dsa_switch *ds, |
135 | struct dsa_notifier_mdb_info *info) | |
136 | { | |
137 | const struct switchdev_obj_port_mdb *mdb = info->mdb; | |
138 | struct switchdev_trans *trans = info->trans; | |
e6db98db | 139 | int port; |
8ae5bcdc | 140 | |
a1a6b7ea | 141 | /* Build a mask of Multicast group members */ |
0015b80a | 142 | bitmap_zero(ds->bitmap, ds->num_ports); |
a1a6b7ea | 143 | if (ds->index == info->sw_index) |
0015b80a | 144 | set_bit(info->port, ds->bitmap); |
a1a6b7ea | 145 | for (port = 0; port < ds->num_ports; port++) |
ae45102c | 146 | if (dsa_is_dsa_port(ds, port)) |
0015b80a | 147 | set_bit(port, ds->bitmap); |
8ae5bcdc | 148 | |
e6db98db | 149 | if (switchdev_trans_ph_prepare(trans)) |
0015b80a | 150 | return dsa_switch_mdb_prepare_bitmap(ds, mdb, ds->bitmap); |
8ae5bcdc | 151 | |
0015b80a | 152 | dsa_switch_mdb_add_bitmap(ds, mdb, ds->bitmap); |
8ae5bcdc VD |
153 | |
154 | return 0; | |
155 | } | |
156 | ||
157 | static int dsa_switch_mdb_del(struct dsa_switch *ds, | |
158 | struct dsa_notifier_mdb_info *info) | |
159 | { | |
160 | const struct switchdev_obj_port_mdb *mdb = info->mdb; | |
161 | ||
8ae5bcdc VD |
162 | if (!ds->ops->port_mdb_del) |
163 | return -EOPNOTSUPP; | |
164 | ||
a1a6b7ea VD |
165 | if (ds->index == info->sw_index) |
166 | return ds->ops->port_mdb_del(ds, info->port, mdb); | |
167 | ||
168 | return 0; | |
8ae5bcdc VD |
169 | } |
170 | ||
9c428c59 VD |
171 | static int |
172 | dsa_switch_vlan_prepare_bitmap(struct dsa_switch *ds, | |
173 | const struct switchdev_obj_port_vlan *vlan, | |
174 | const unsigned long *bitmap) | |
175 | { | |
176 | int port, err; | |
177 | ||
178 | if (!ds->ops->port_vlan_prepare || !ds->ops->port_vlan_add) | |
179 | return -EOPNOTSUPP; | |
180 | ||
181 | for_each_set_bit(port, bitmap, ds->num_ports) { | |
182 | err = ds->ops->port_vlan_prepare(ds, port, vlan); | |
183 | if (err) | |
184 | return err; | |
185 | } | |
186 | ||
187 | return 0; | |
188 | } | |
189 | ||
190 | static void | |
191 | dsa_switch_vlan_add_bitmap(struct dsa_switch *ds, | |
192 | const struct switchdev_obj_port_vlan *vlan, | |
193 | const unsigned long *bitmap) | |
194 | { | |
195 | int port; | |
196 | ||
197 | for_each_set_bit(port, bitmap, ds->num_ports) | |
198 | ds->ops->port_vlan_add(ds, port, vlan); | |
199 | } | |
200 | ||
d0c627b8 VD |
201 | static int dsa_switch_vlan_add(struct dsa_switch *ds, |
202 | struct dsa_notifier_vlan_info *info) | |
203 | { | |
204 | const struct switchdev_obj_port_vlan *vlan = info->vlan; | |
205 | struct switchdev_trans *trans = info->trans; | |
9c428c59 | 206 | int port; |
d0c627b8 | 207 | |
1ca4aa9c | 208 | /* Build a mask of VLAN members */ |
0015b80a | 209 | bitmap_zero(ds->bitmap, ds->num_ports); |
1ca4aa9c | 210 | if (ds->index == info->sw_index) |
0015b80a | 211 | set_bit(info->port, ds->bitmap); |
b2f81d30 VD |
212 | for (port = 0; port < ds->num_ports; port++) |
213 | if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) | |
0015b80a | 214 | set_bit(port, ds->bitmap); |
d0c627b8 | 215 | |
9c428c59 | 216 | if (switchdev_trans_ph_prepare(trans)) |
0015b80a | 217 | return dsa_switch_vlan_prepare_bitmap(ds, vlan, ds->bitmap); |
d0c627b8 | 218 | |
0015b80a | 219 | dsa_switch_vlan_add_bitmap(ds, vlan, ds->bitmap); |
d0c627b8 VD |
220 | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static int dsa_switch_vlan_del(struct dsa_switch *ds, | |
225 | struct dsa_notifier_vlan_info *info) | |
226 | { | |
227 | const struct switchdev_obj_port_vlan *vlan = info->vlan; | |
228 | ||
d0c627b8 VD |
229 | if (!ds->ops->port_vlan_del) |
230 | return -EOPNOTSUPP; | |
231 | ||
1ca4aa9c VD |
232 | if (ds->index == info->sw_index) |
233 | return ds->ops->port_vlan_del(ds, info->port, vlan); | |
234 | ||
235 | return 0; | |
d0c627b8 VD |
236 | } |
237 | ||
f515f192 VD |
238 | static int dsa_switch_event(struct notifier_block *nb, |
239 | unsigned long event, void *info) | |
240 | { | |
241 | struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb); | |
242 | int err; | |
243 | ||
244 | switch (event) { | |
1faabf74 VD |
245 | case DSA_NOTIFIER_AGEING_TIME: |
246 | err = dsa_switch_ageing_time(ds, info); | |
247 | break; | |
04d3a4c6 VD |
248 | case DSA_NOTIFIER_BRIDGE_JOIN: |
249 | err = dsa_switch_bridge_join(ds, info); | |
250 | break; | |
251 | case DSA_NOTIFIER_BRIDGE_LEAVE: | |
252 | err = dsa_switch_bridge_leave(ds, info); | |
253 | break; | |
685fb6a4 VD |
254 | case DSA_NOTIFIER_FDB_ADD: |
255 | err = dsa_switch_fdb_add(ds, info); | |
256 | break; | |
257 | case DSA_NOTIFIER_FDB_DEL: | |
258 | err = dsa_switch_fdb_del(ds, info); | |
259 | break; | |
8ae5bcdc VD |
260 | case DSA_NOTIFIER_MDB_ADD: |
261 | err = dsa_switch_mdb_add(ds, info); | |
262 | break; | |
263 | case DSA_NOTIFIER_MDB_DEL: | |
264 | err = dsa_switch_mdb_del(ds, info); | |
265 | break; | |
d0c627b8 VD |
266 | case DSA_NOTIFIER_VLAN_ADD: |
267 | err = dsa_switch_vlan_add(ds, info); | |
268 | break; | |
269 | case DSA_NOTIFIER_VLAN_DEL: | |
270 | err = dsa_switch_vlan_del(ds, info); | |
271 | break; | |
f515f192 VD |
272 | default: |
273 | err = -EOPNOTSUPP; | |
274 | break; | |
275 | } | |
276 | ||
277 | /* Non-switchdev operations cannot be rolled back. If a DSA driver | |
278 | * returns an error during the chained call, switch chips may be in an | |
279 | * inconsistent state. | |
280 | */ | |
281 | if (err) | |
282 | dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n", | |
283 | event, err); | |
284 | ||
285 | return notifier_from_errno(err); | |
286 | } | |
287 | ||
288 | int dsa_switch_register_notifier(struct dsa_switch *ds) | |
289 | { | |
290 | ds->nb.notifier_call = dsa_switch_event; | |
291 | ||
292 | return raw_notifier_chain_register(&ds->dst->nh, &ds->nb); | |
293 | } | |
294 | ||
295 | void dsa_switch_unregister_notifier(struct dsa_switch *ds) | |
296 | { | |
297 | int err; | |
298 | ||
299 | err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb); | |
300 | if (err) | |
301 | dev_err(ds->dev, "failed to unregister notifier (%d)\n", err); | |
302 | } |