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Commit | Line | Data |
---|---|---|
f444de05 JB |
1 | /* |
2 | * mac80211 - channel management | |
3 | */ | |
4 | ||
0aaffa9b | 5 | #include <linux/nl80211.h> |
3448c005 | 6 | #include <linux/export.h> |
4d76d21b | 7 | #include <linux/rtnetlink.h> |
3117bbdb | 8 | #include <net/cfg80211.h> |
f444de05 | 9 | #include "ieee80211_i.h" |
35f2fce9 | 10 | #include "driver-ops.h" |
f444de05 | 11 | |
c0166da9 MK |
12 | static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local, |
13 | struct ieee80211_chanctx *ctx) | |
14 | { | |
15 | struct ieee80211_sub_if_data *sdata; | |
16 | int num = 0; | |
17 | ||
18 | lockdep_assert_held(&local->chanctx_mtx); | |
19 | ||
20 | list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) | |
21 | num++; | |
22 | ||
23 | return num; | |
24 | } | |
25 | ||
26 | static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local, | |
27 | struct ieee80211_chanctx *ctx) | |
28 | { | |
29 | struct ieee80211_sub_if_data *sdata; | |
30 | int num = 0; | |
31 | ||
32 | lockdep_assert_held(&local->chanctx_mtx); | |
33 | ||
34 | list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) | |
35 | num++; | |
36 | ||
37 | return num; | |
38 | } | |
39 | ||
40 | int ieee80211_chanctx_refcount(struct ieee80211_local *local, | |
41 | struct ieee80211_chanctx *ctx) | |
42 | { | |
43 | return ieee80211_chanctx_num_assigned(local, ctx) + | |
44 | ieee80211_chanctx_num_reserved(local, ctx); | |
45 | } | |
46 | ||
c2b90ad8 MK |
47 | static int ieee80211_num_chanctx(struct ieee80211_local *local) |
48 | { | |
49 | struct ieee80211_chanctx *ctx; | |
50 | int num = 0; | |
51 | ||
52 | lockdep_assert_held(&local->chanctx_mtx); | |
53 | ||
54 | list_for_each_entry(ctx, &local->chanctx_list, list) | |
55 | num++; | |
56 | ||
57 | return num; | |
58 | } | |
59 | ||
60 | static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local) | |
61 | { | |
62 | lockdep_assert_held(&local->chanctx_mtx); | |
63 | return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local); | |
64 | } | |
65 | ||
0288157b MK |
66 | static const struct cfg80211_chan_def * |
67 | ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, | |
68 | struct ieee80211_chanctx *ctx, | |
69 | const struct cfg80211_chan_def *compat) | |
70 | { | |
71 | struct ieee80211_sub_if_data *sdata; | |
72 | ||
73 | lockdep_assert_held(&local->chanctx_mtx); | |
74 | ||
75 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
76 | reserved_chanctx_list) { | |
77 | if (!compat) | |
78 | compat = &sdata->reserved_chandef; | |
79 | ||
80 | compat = cfg80211_chandef_compatible(&sdata->reserved_chandef, | |
81 | compat); | |
82 | if (!compat) | |
83 | break; | |
84 | } | |
85 | ||
86 | return compat; | |
87 | } | |
88 | ||
13f348a8 MK |
89 | static const struct cfg80211_chan_def * |
90 | ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, | |
91 | struct ieee80211_chanctx *ctx, | |
92 | const struct cfg80211_chan_def *compat) | |
93 | { | |
94 | struct ieee80211_sub_if_data *sdata; | |
95 | ||
96 | lockdep_assert_held(&local->chanctx_mtx); | |
97 | ||
98 | list_for_each_entry(sdata, &ctx->assigned_vifs, | |
99 | assigned_chanctx_list) { | |
100 | if (sdata->reserved_chanctx != NULL) | |
101 | continue; | |
102 | ||
103 | if (!compat) | |
104 | compat = &sdata->vif.bss_conf.chandef; | |
105 | ||
106 | compat = cfg80211_chandef_compatible( | |
107 | &sdata->vif.bss_conf.chandef, compat); | |
108 | if (!compat) | |
109 | break; | |
110 | } | |
111 | ||
112 | return compat; | |
113 | } | |
114 | ||
115 | static const struct cfg80211_chan_def * | |
116 | ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, | |
117 | struct ieee80211_chanctx *ctx, | |
118 | const struct cfg80211_chan_def *compat) | |
119 | { | |
120 | lockdep_assert_held(&local->chanctx_mtx); | |
121 | ||
122 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); | |
123 | if (!compat) | |
124 | return NULL; | |
125 | ||
126 | compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); | |
127 | if (!compat) | |
128 | return NULL; | |
129 | ||
130 | return compat; | |
131 | } | |
132 | ||
133 | static bool | |
134 | ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, | |
135 | struct ieee80211_chanctx *ctx, | |
136 | const struct cfg80211_chan_def *def) | |
137 | { | |
138 | lockdep_assert_held(&local->chanctx_mtx); | |
139 | ||
140 | if (ieee80211_chanctx_combined_chandef(local, ctx, def)) | |
141 | return true; | |
142 | ||
143 | if (!list_empty(&ctx->reserved_vifs) && | |
144 | ieee80211_chanctx_reserved_chandef(local, ctx, def)) | |
145 | return true; | |
146 | ||
147 | return false; | |
148 | } | |
149 | ||
150 | static struct ieee80211_chanctx * | |
151 | ieee80211_find_reservation_chanctx(struct ieee80211_local *local, | |
152 | const struct cfg80211_chan_def *chandef, | |
153 | enum ieee80211_chanctx_mode mode) | |
154 | { | |
155 | struct ieee80211_chanctx *ctx; | |
156 | ||
157 | lockdep_assert_held(&local->chanctx_mtx); | |
158 | ||
159 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
160 | return NULL; | |
161 | ||
162 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
163 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
164 | continue; | |
165 | ||
166 | if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, | |
167 | chandef)) | |
168 | continue; | |
169 | ||
170 | return ctx; | |
171 | } | |
172 | ||
173 | return NULL; | |
174 | } | |
175 | ||
21f659bf EP |
176 | static enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) |
177 | { | |
178 | switch (sta->bandwidth) { | |
179 | case IEEE80211_STA_RX_BW_20: | |
180 | if (sta->ht_cap.ht_supported) | |
181 | return NL80211_CHAN_WIDTH_20; | |
182 | else | |
183 | return NL80211_CHAN_WIDTH_20_NOHT; | |
184 | case IEEE80211_STA_RX_BW_40: | |
185 | return NL80211_CHAN_WIDTH_40; | |
186 | case IEEE80211_STA_RX_BW_80: | |
187 | return NL80211_CHAN_WIDTH_80; | |
188 | case IEEE80211_STA_RX_BW_160: | |
189 | /* | |
190 | * This applied for both 160 and 80+80. since we use | |
191 | * the returned value to consider degradation of | |
192 | * ctx->conf.min_def, we have to make sure to take | |
193 | * the bigger one (NL80211_CHAN_WIDTH_160). | |
194 | * Otherwise we might try degrading even when not | |
195 | * needed, as the max required sta_bw returned (80+80) | |
196 | * might be smaller than the configured bw (160). | |
197 | */ | |
198 | return NL80211_CHAN_WIDTH_160; | |
199 | default: | |
200 | WARN_ON(1); | |
201 | return NL80211_CHAN_WIDTH_20; | |
202 | } | |
203 | } | |
204 | ||
205 | static enum nl80211_chan_width | |
206 | ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata) | |
207 | { | |
208 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
209 | struct sta_info *sta; | |
210 | ||
211 | rcu_read_lock(); | |
212 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
213 | if (sdata != sta->sdata && | |
214 | !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) | |
215 | continue; | |
216 | ||
217 | if (!sta->uploaded) | |
218 | continue; | |
219 | ||
220 | max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); | |
221 | } | |
222 | rcu_read_unlock(); | |
223 | ||
224 | return max_bw; | |
225 | } | |
226 | ||
227 | static enum nl80211_chan_width | |
228 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
229 | struct ieee80211_chanctx_conf *conf) | |
230 | { | |
231 | struct ieee80211_sub_if_data *sdata; | |
232 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
233 | ||
234 | rcu_read_lock(); | |
235 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
236 | struct ieee80211_vif *vif = &sdata->vif; | |
237 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; | |
238 | ||
239 | if (!ieee80211_sdata_running(sdata)) | |
240 | continue; | |
241 | ||
242 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
243 | continue; | |
244 | ||
245 | switch (vif->type) { | |
246 | case NL80211_IFTYPE_AP: | |
247 | case NL80211_IFTYPE_AP_VLAN: | |
248 | width = ieee80211_get_max_required_bw(sdata); | |
249 | break; | |
250 | case NL80211_IFTYPE_P2P_DEVICE: | |
251 | continue; | |
252 | case NL80211_IFTYPE_STATION: | |
253 | case NL80211_IFTYPE_ADHOC: | |
254 | case NL80211_IFTYPE_WDS: | |
255 | case NL80211_IFTYPE_MESH_POINT: | |
256 | width = vif->bss_conf.chandef.width; | |
257 | break; | |
258 | case NL80211_IFTYPE_UNSPECIFIED: | |
259 | case NUM_NL80211_IFTYPES: | |
260 | case NL80211_IFTYPE_MONITOR: | |
261 | case NL80211_IFTYPE_P2P_CLIENT: | |
262 | case NL80211_IFTYPE_P2P_GO: | |
263 | WARN_ON_ONCE(1); | |
264 | } | |
265 | max_bw = max(max_bw, width); | |
266 | } | |
1c37a72c EP |
267 | |
268 | /* use the configured bandwidth in case of monitor interface */ | |
269 | sdata = rcu_dereference(local->monitor_sdata); | |
270 | if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf) | |
271 | max_bw = max(max_bw, conf->def.width); | |
272 | ||
21f659bf EP |
273 | rcu_read_unlock(); |
274 | ||
275 | return max_bw; | |
276 | } | |
277 | ||
278 | /* | |
279 | * recalc the min required chan width of the channel context, which is | |
280 | * the max of min required widths of all the interfaces bound to this | |
281 | * channel context. | |
282 | */ | |
283 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
284 | struct ieee80211_chanctx *ctx) | |
285 | { | |
286 | enum nl80211_chan_width max_bw; | |
287 | struct cfg80211_chan_def min_def; | |
288 | ||
289 | lockdep_assert_held(&local->chanctx_mtx); | |
290 | ||
291 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
292 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || | |
293 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
294 | ctx->conf.radar_enabled) { | |
295 | ctx->conf.min_def = ctx->conf.def; | |
296 | return; | |
297 | } | |
298 | ||
299 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
300 | ||
301 | /* downgrade chandef up to max_bw */ | |
302 | min_def = ctx->conf.def; | |
303 | while (min_def.width > max_bw) | |
304 | ieee80211_chandef_downgrade(&min_def); | |
305 | ||
306 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
307 | return; | |
308 | ||
309 | ctx->conf.min_def = min_def; | |
310 | if (!ctx->driver_present) | |
311 | return; | |
312 | ||
313 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH); | |
314 | } | |
315 | ||
18942d3b | 316 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
317 | struct ieee80211_chanctx *ctx, |
318 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 319 | { |
4bf88530 | 320 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) |
e89a96f5 | 321 | return; |
0aaffa9b | 322 | |
4bf88530 JB |
323 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
324 | ||
325 | ctx->conf.def = *chandef; | |
326 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 327 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
328 | |
329 | if (!local->use_chanctx) { | |
675a0b04 | 330 | local->_oper_chandef = *chandef; |
55de908a JB |
331 | ieee80211_hw_config(local, 0); |
332 | } | |
0aaffa9b | 333 | } |
d01a1e65 MK |
334 | |
335 | static struct ieee80211_chanctx * | |
336 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 337 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
338 | enum ieee80211_chanctx_mode mode) |
339 | { | |
340 | struct ieee80211_chanctx *ctx; | |
341 | ||
342 | lockdep_assert_held(&local->chanctx_mtx); | |
343 | ||
344 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
345 | return NULL; | |
d01a1e65 MK |
346 | |
347 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 348 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 349 | |
d01a1e65 MK |
350 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
351 | continue; | |
4bf88530 JB |
352 | |
353 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
354 | if (!compat) | |
d01a1e65 MK |
355 | continue; |
356 | ||
0288157b MK |
357 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
358 | compat); | |
359 | if (!compat) | |
360 | continue; | |
361 | ||
18942d3b | 362 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 363 | |
d01a1e65 MK |
364 | return ctx; |
365 | } | |
366 | ||
367 | return NULL; | |
368 | } | |
369 | ||
e4746851 SW |
370 | static bool ieee80211_is_radar_required(struct ieee80211_local *local) |
371 | { | |
372 | struct ieee80211_sub_if_data *sdata; | |
373 | ||
cc901de1 MK |
374 | lockdep_assert_held(&local->mtx); |
375 | ||
e4746851 SW |
376 | rcu_read_lock(); |
377 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
378 | if (sdata->radar_required) { | |
379 | rcu_read_unlock(); | |
380 | return true; | |
381 | } | |
382 | } | |
383 | rcu_read_unlock(); | |
384 | ||
385 | return false; | |
386 | } | |
387 | ||
d01a1e65 | 388 | static struct ieee80211_chanctx * |
ed68ebca MK |
389 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
390 | const struct cfg80211_chan_def *chandef, | |
391 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
392 | { |
393 | struct ieee80211_chanctx *ctx; | |
394 | ||
395 | lockdep_assert_held(&local->chanctx_mtx); | |
396 | ||
397 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
398 | if (!ctx) | |
ed68ebca | 399 | return NULL; |
d01a1e65 | 400 | |
484298ad | 401 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 402 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 403 | ctx->conf.def = *chandef; |
04ecd257 JB |
404 | ctx->conf.rx_chains_static = 1; |
405 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 406 | ctx->mode = mode; |
e4746851 | 407 | ctx->conf.radar_enabled = ieee80211_is_radar_required(local); |
21f659bf | 408 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
409 | |
410 | return ctx; | |
411 | } | |
412 | ||
413 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
414 | struct ieee80211_chanctx *ctx) | |
415 | { | |
416 | u32 changed; | |
417 | int err; | |
418 | ||
419 | lockdep_assert_held(&local->mtx); | |
420 | lockdep_assert_held(&local->chanctx_mtx); | |
421 | ||
e4746851 SW |
422 | if (!local->use_chanctx) |
423 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 424 | |
382a103b JB |
425 | /* turn idle off *before* setting channel -- some drivers need that */ |
426 | changed = ieee80211_idle_off(local); | |
427 | if (changed) | |
428 | ieee80211_hw_config(local, changed); | |
429 | ||
55de908a | 430 | if (!local->use_chanctx) { |
ed68ebca | 431 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 432 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
433 | } else { |
434 | err = drv_add_chanctx(local, ctx); | |
435 | if (err) { | |
382a103b | 436 | ieee80211_recalc_idle(local); |
ed68ebca | 437 | return err; |
55de908a | 438 | } |
35f2fce9 MK |
439 | } |
440 | ||
ed68ebca MK |
441 | return 0; |
442 | } | |
443 | ||
444 | static struct ieee80211_chanctx * | |
445 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
446 | const struct cfg80211_chan_def *chandef, | |
447 | enum ieee80211_chanctx_mode mode) | |
448 | { | |
449 | struct ieee80211_chanctx *ctx; | |
450 | int err; | |
d01a1e65 | 451 | |
ed68ebca MK |
452 | lockdep_assert_held(&local->mtx); |
453 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 454 | |
ed68ebca MK |
455 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
456 | if (!ctx) | |
457 | return ERR_PTR(-ENOMEM); | |
458 | ||
459 | err = ieee80211_add_chanctx(local, ctx); | |
460 | if (err) { | |
461 | kfree(ctx); | |
462 | return ERR_PTR(err); | |
463 | } | |
464 | ||
465 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
466 | return ctx; |
467 | } | |
468 | ||
1f0d54cd MK |
469 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
470 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
471 | { |
472 | lockdep_assert_held(&local->chanctx_mtx); | |
473 | ||
55de908a | 474 | if (!local->use_chanctx) { |
675a0b04 KB |
475 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
476 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
477 | chandef->center_freq1 = chandef->chan->center_freq; | |
478 | chandef->center_freq2 = 0; | |
e4746851 SW |
479 | |
480 | /* NOTE: Disabling radar is only valid here for | |
481 | * single channel context. To be sure, check it ... | |
482 | */ | |
1f0d54cd MK |
483 | WARN_ON(local->hw.conf.radar_enabled && |
484 | !list_empty(&local->chanctx_list)); | |
485 | ||
e4746851 SW |
486 | local->hw.conf.radar_enabled = false; |
487 | ||
9b4816f5 | 488 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
489 | } else { |
490 | drv_remove_chanctx(local, ctx); | |
491 | } | |
35f2fce9 | 492 | |
fd0f979a | 493 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
494 | } |
495 | ||
1f0d54cd MK |
496 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
497 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 498 | { |
d01a1e65 MK |
499 | lockdep_assert_held(&local->chanctx_mtx); |
500 | ||
c0166da9 | 501 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 502 | |
1f0d54cd MK |
503 | list_del_rcu(&ctx->list); |
504 | ieee80211_del_chanctx(local, ctx); | |
505 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
506 | } |
507 | ||
4bf88530 JB |
508 | static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
509 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
510 | { |
511 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
512 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 513 | const struct cfg80211_chan_def *compat = NULL; |
e89a96f5 MK |
514 | |
515 | lockdep_assert_held(&local->chanctx_mtx); | |
516 | ||
517 | rcu_read_lock(); | |
518 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 519 | |
e89a96f5 MK |
520 | if (!ieee80211_sdata_running(sdata)) |
521 | continue; | |
522 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
523 | continue; | |
524 | ||
4bf88530 JB |
525 | if (!compat) |
526 | compat = &sdata->vif.bss_conf.chandef; | |
527 | ||
528 | compat = cfg80211_chandef_compatible( | |
529 | &sdata->vif.bss_conf.chandef, compat); | |
530 | if (!compat) | |
531 | break; | |
e89a96f5 MK |
532 | } |
533 | rcu_read_unlock(); | |
534 | ||
4bf88530 JB |
535 | if (WARN_ON_ONCE(!compat)) |
536 | return; | |
e89a96f5 | 537 | |
18942d3b | 538 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
539 | } |
540 | ||
367bbd10 JB |
541 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
542 | struct ieee80211_chanctx *chanctx) | |
543 | { | |
544 | bool radar_enabled; | |
545 | ||
546 | lockdep_assert_held(&local->chanctx_mtx); | |
34a3740d JB |
547 | /* for setting local->radar_detect_enabled */ |
548 | lockdep_assert_held(&local->mtx); | |
367bbd10 JB |
549 | |
550 | radar_enabled = ieee80211_is_radar_required(local); | |
551 | ||
552 | if (radar_enabled == chanctx->conf.radar_enabled) | |
553 | return; | |
554 | ||
555 | chanctx->conf.radar_enabled = radar_enabled; | |
556 | local->radar_detect_enabled = chanctx->conf.radar_enabled; | |
557 | ||
558 | if (!local->use_chanctx) { | |
559 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
560 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
561 | } | |
562 | ||
563 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
564 | } | |
565 | ||
77eeba97 LC |
566 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
567 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 568 | { |
35f2fce9 | 569 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
570 | struct ieee80211_chanctx_conf *conf; |
571 | struct ieee80211_chanctx *curr_ctx = NULL; | |
572 | int ret = 0; | |
d01a1e65 | 573 | |
77eeba97 LC |
574 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
575 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 576 | |
77eeba97 LC |
577 | if (conf) { |
578 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 579 | |
77eeba97 LC |
580 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
581 | conf = NULL; | |
484298ad | 582 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 583 | } |
5bbe754d | 584 | |
77eeba97 LC |
585 | if (new_ctx) { |
586 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
587 | if (ret) | |
588 | goto out; | |
fd0f979a | 589 | |
77eeba97 | 590 | conf = &new_ctx->conf; |
484298ad MK |
591 | list_add(&sdata->assigned_chanctx_list, |
592 | &new_ctx->assigned_vifs); | |
77eeba97 | 593 | } |
e89a96f5 | 594 | |
77eeba97 LC |
595 | out: |
596 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 597 | |
77eeba97 LC |
598 | sdata->vif.bss_conf.idle = !conf; |
599 | ||
c0166da9 | 600 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
601 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
602 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
603 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
604 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 605 | } |
e89a96f5 | 606 | |
c0166da9 | 607 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
77eeba97 LC |
608 | ieee80211_recalc_txpower(sdata); |
609 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
04ecd257 | 610 | } |
77eeba97 LC |
611 | |
612 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
613 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
614 | ieee80211_bss_info_change_notify(sdata, | |
615 | BSS_CHANGED_IDLE); | |
616 | ||
617 | return ret; | |
d01a1e65 MK |
618 | } |
619 | ||
620 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) | |
621 | { | |
622 | struct ieee80211_local *local = sdata->local; | |
623 | struct ieee80211_chanctx_conf *conf; | |
624 | struct ieee80211_chanctx *ctx; | |
625 | ||
626 | lockdep_assert_held(&local->chanctx_mtx); | |
627 | ||
628 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
629 | lockdep_is_held(&local->chanctx_mtx)); | |
630 | if (!conf) | |
631 | return; | |
632 | ||
633 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
634 | ||
11335a55 LC |
635 | if (sdata->reserved_chanctx) |
636 | ieee80211_vif_unreserve_chanctx(sdata); | |
637 | ||
77eeba97 | 638 | ieee80211_assign_vif_chanctx(sdata, NULL); |
c0166da9 | 639 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
d01a1e65 MK |
640 | ieee80211_free_chanctx(local, ctx); |
641 | } | |
642 | ||
04ecd257 JB |
643 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
644 | struct ieee80211_chanctx *chanctx) | |
645 | { | |
646 | struct ieee80211_sub_if_data *sdata; | |
647 | u8 rx_chains_static, rx_chains_dynamic; | |
648 | ||
649 | lockdep_assert_held(&local->chanctx_mtx); | |
650 | ||
651 | rx_chains_static = 1; | |
652 | rx_chains_dynamic = 1; | |
653 | ||
654 | rcu_read_lock(); | |
655 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
656 | u8 needed_static, needed_dynamic; | |
657 | ||
658 | if (!ieee80211_sdata_running(sdata)) | |
659 | continue; | |
660 | ||
661 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
662 | &chanctx->conf) | |
663 | continue; | |
664 | ||
665 | switch (sdata->vif.type) { | |
666 | case NL80211_IFTYPE_P2P_DEVICE: | |
667 | continue; | |
668 | case NL80211_IFTYPE_STATION: | |
669 | if (!sdata->u.mgd.associated) | |
670 | continue; | |
671 | break; | |
672 | case NL80211_IFTYPE_AP_VLAN: | |
673 | continue; | |
674 | case NL80211_IFTYPE_AP: | |
675 | case NL80211_IFTYPE_ADHOC: | |
676 | case NL80211_IFTYPE_WDS: | |
677 | case NL80211_IFTYPE_MESH_POINT: | |
678 | break; | |
679 | default: | |
680 | WARN_ON_ONCE(1); | |
681 | } | |
682 | ||
683 | switch (sdata->smps_mode) { | |
684 | default: | |
685 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
686 | sdata->smps_mode); | |
687 | /* fall through */ | |
688 | case IEEE80211_SMPS_OFF: | |
689 | needed_static = sdata->needed_rx_chains; | |
690 | needed_dynamic = sdata->needed_rx_chains; | |
691 | break; | |
692 | case IEEE80211_SMPS_DYNAMIC: | |
693 | needed_static = 1; | |
694 | needed_dynamic = sdata->needed_rx_chains; | |
695 | break; | |
696 | case IEEE80211_SMPS_STATIC: | |
697 | needed_static = 1; | |
698 | needed_dynamic = 1; | |
699 | break; | |
700 | } | |
701 | ||
702 | rx_chains_static = max(rx_chains_static, needed_static); | |
703 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
704 | } | |
7b8a9cdd IY |
705 | |
706 | /* Disable SMPS for the monitor interface */ | |
707 | sdata = rcu_dereference(local->monitor_sdata); | |
708 | if (sdata && | |
709 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
710 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
711 | ||
04ecd257 JB |
712 | rcu_read_unlock(); |
713 | ||
714 | if (!local->use_chanctx) { | |
715 | if (rx_chains_static > 1) | |
716 | local->smps_mode = IEEE80211_SMPS_OFF; | |
717 | else if (rx_chains_dynamic > 1) | |
718 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
719 | else | |
720 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
721 | ieee80211_hw_config(local, 0); | |
722 | } | |
723 | ||
724 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
725 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
726 | return; | |
727 | ||
728 | chanctx->conf.rx_chains_static = rx_chains_static; | |
729 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
730 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
731 | } | |
732 | ||
d01a1e65 | 733 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, |
4bf88530 | 734 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
735 | enum ieee80211_chanctx_mode mode) |
736 | { | |
737 | struct ieee80211_local *local = sdata->local; | |
738 | struct ieee80211_chanctx *ctx; | |
73de86a3 | 739 | u8 radar_detect_width = 0; |
d01a1e65 MK |
740 | int ret; |
741 | ||
34a3740d JB |
742 | lockdep_assert_held(&local->mtx); |
743 | ||
55de908a JB |
744 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
745 | ||
d01a1e65 | 746 | mutex_lock(&local->chanctx_mtx); |
73de86a3 LC |
747 | |
748 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
749 | chandef, | |
750 | sdata->wdev.iftype); | |
751 | if (ret < 0) | |
752 | goto out; | |
753 | if (ret > 0) | |
754 | radar_detect_width = BIT(chandef->width); | |
755 | ||
756 | sdata->radar_required = ret; | |
757 | ||
758 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
759 | radar_detect_width); | |
760 | if (ret < 0) | |
761 | goto out; | |
762 | ||
d01a1e65 MK |
763 | __ieee80211_vif_release_channel(sdata); |
764 | ||
4bf88530 | 765 | ctx = ieee80211_find_chanctx(local, chandef, mode); |
d01a1e65 | 766 | if (!ctx) |
4bf88530 | 767 | ctx = ieee80211_new_chanctx(local, chandef, mode); |
d01a1e65 MK |
768 | if (IS_ERR(ctx)) { |
769 | ret = PTR_ERR(ctx); | |
770 | goto out; | |
771 | } | |
772 | ||
4bf88530 | 773 | sdata->vif.bss_conf.chandef = *chandef; |
55de908a | 774 | |
d01a1e65 MK |
775 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); |
776 | if (ret) { | |
777 | /* if assign fails refcount stays the same */ | |
c0166da9 | 778 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
d01a1e65 MK |
779 | ieee80211_free_chanctx(local, ctx); |
780 | goto out; | |
781 | } | |
782 | ||
04ecd257 | 783 | ieee80211_recalc_smps_chanctx(local, ctx); |
164eb02d | 784 | ieee80211_recalc_radar_chanctx(local, ctx); |
d01a1e65 MK |
785 | out: |
786 | mutex_unlock(&local->chanctx_mtx); | |
787 | return ret; | |
788 | } | |
789 | ||
33ffd952 LC |
790 | static int __ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, |
791 | struct ieee80211_chanctx *ctx, | |
792 | u32 *changed) | |
73da7d5b SW |
793 | { |
794 | struct ieee80211_local *local = sdata->local; | |
33787fc4 | 795 | const struct cfg80211_chan_def *chandef = &sdata->csa_chandef; |
73da7d5b SW |
796 | u32 chanctx_changed = 0; |
797 | ||
73da7d5b SW |
798 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, |
799 | IEEE80211_CHAN_DISABLED)) | |
800 | return -EINVAL; | |
801 | ||
c0166da9 | 802 | if (ieee80211_chanctx_refcount(local, ctx) != 1) |
33ffd952 | 803 | return -EINVAL; |
73da7d5b SW |
804 | |
805 | if (sdata->vif.bss_conf.chandef.width != chandef->width) { | |
806 | chanctx_changed = IEEE80211_CHANCTX_CHANGE_WIDTH; | |
807 | *changed |= BSS_CHANGED_BANDWIDTH; | |
808 | } | |
809 | ||
810 | sdata->vif.bss_conf.chandef = *chandef; | |
811 | ctx->conf.def = *chandef; | |
812 | ||
813 | chanctx_changed |= IEEE80211_CHANCTX_CHANGE_CHANNEL; | |
814 | drv_change_chanctx(local, ctx, chanctx_changed); | |
815 | ||
73da7d5b SW |
816 | ieee80211_recalc_chanctx_chantype(local, ctx); |
817 | ieee80211_recalc_smps_chanctx(local, ctx); | |
818 | ieee80211_recalc_radar_chanctx(local, ctx); | |
21f659bf | 819 | ieee80211_recalc_chanctx_min_def(local, ctx); |
73da7d5b | 820 | |
33ffd952 LC |
821 | return 0; |
822 | } | |
823 | ||
73da7d5b | 824 | int ieee80211_vif_change_channel(struct ieee80211_sub_if_data *sdata, |
73da7d5b SW |
825 | u32 *changed) |
826 | { | |
827 | struct ieee80211_local *local = sdata->local; | |
828 | struct ieee80211_chanctx_conf *conf; | |
829 | struct ieee80211_chanctx *ctx; | |
830 | int ret; | |
73da7d5b | 831 | |
34a3740d JB |
832 | lockdep_assert_held(&local->mtx); |
833 | ||
73da7d5b SW |
834 | /* should never be called if not performing a channel switch. */ |
835 | if (WARN_ON(!sdata->vif.csa_active)) | |
836 | return -EINVAL; | |
837 | ||
33ffd952 LC |
838 | mutex_lock(&local->chanctx_mtx); |
839 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
840 | lockdep_is_held(&local->chanctx_mtx)); | |
841 | if (!conf) { | |
842 | ret = -EINVAL; | |
843 | goto out; | |
844 | } | |
845 | ||
846 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
847 | ||
848 | ret = __ieee80211_vif_change_channel(sdata, ctx, changed); | |
73da7d5b SW |
849 | out: |
850 | mutex_unlock(&local->chanctx_mtx); | |
851 | return ret; | |
852 | } | |
853 | ||
11335a55 LC |
854 | static void |
855 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
856 | bool clear) | |
857 | { | |
33926eb7 | 858 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
859 | struct ieee80211_sub_if_data *vlan; |
860 | struct ieee80211_chanctx_conf *conf; | |
861 | ||
862 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
863 | return; | |
864 | ||
865 | lockdep_assert_held(&local->mtx); | |
866 | ||
867 | /* Check that conf exists, even when clearing this function | |
868 | * must be called with the AP's channel context still there | |
869 | * as it would otherwise cause VLANs to have an invalid | |
870 | * channel context pointer for a while, possibly pointing | |
871 | * to a channel context that has already been freed. | |
872 | */ | |
873 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 874 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
875 | WARN_ON(!conf); |
876 | ||
877 | if (clear) | |
878 | conf = NULL; | |
879 | ||
880 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
881 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
882 | } | |
883 | ||
884 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
885 | bool clear) | |
886 | { | |
887 | struct ieee80211_local *local = sdata->local; | |
888 | ||
889 | mutex_lock(&local->chanctx_mtx); | |
890 | ||
891 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
892 | ||
893 | mutex_unlock(&local->chanctx_mtx); | |
894 | } | |
895 | ||
896 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
897 | { | |
e3afb920 MK |
898 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
899 | ||
11335a55 LC |
900 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
901 | ||
e3afb920 | 902 | if (WARN_ON(!ctx)) |
73da7d5b SW |
903 | return -EINVAL; |
904 | ||
e3afb920 | 905 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
906 | sdata->reserved_chanctx = NULL; |
907 | ||
c0166da9 | 908 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) |
e3afb920 MK |
909 | ieee80211_free_chanctx(sdata->local, ctx); |
910 | ||
11335a55 LC |
911 | return 0; |
912 | } | |
913 | ||
914 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
915 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
916 | enum ieee80211_chanctx_mode mode, |
917 | bool radar_required) | |
11335a55 LC |
918 | { |
919 | struct ieee80211_local *local = sdata->local; | |
920 | struct ieee80211_chanctx_conf *conf; | |
921 | struct ieee80211_chanctx *new_ctx, *curr_ctx; | |
922 | int ret = 0; | |
923 | ||
73da7d5b | 924 | mutex_lock(&local->chanctx_mtx); |
11335a55 | 925 | |
73da7d5b SW |
926 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
927 | lockdep_is_held(&local->chanctx_mtx)); | |
928 | if (!conf) { | |
929 | ret = -EINVAL; | |
930 | goto out; | |
931 | } | |
932 | ||
11335a55 LC |
933 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); |
934 | ||
13f348a8 | 935 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 936 | if (!new_ctx) { |
c0166da9 | 937 | if (ieee80211_chanctx_refcount(local, curr_ctx) == 1 && |
5d52ee81 LC |
938 | (local->hw.flags & IEEE80211_HW_CHANGE_RUNNING_CHANCTX)) { |
939 | /* if we're the only users of the chanctx and | |
940 | * the driver supports changing a running | |
941 | * context, reserve our current context | |
942 | */ | |
943 | new_ctx = curr_ctx; | |
c2b90ad8 | 944 | } else if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 LC |
945 | /* create a new context and reserve it */ |
946 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); | |
947 | if (IS_ERR(new_ctx)) { | |
948 | ret = PTR_ERR(new_ctx); | |
949 | goto out; | |
950 | } | |
c2b90ad8 MK |
951 | } else { |
952 | ret = -EBUSY; | |
953 | goto out; | |
11335a55 LC |
954 | } |
955 | } | |
956 | ||
e3afb920 | 957 | list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); |
11335a55 LC |
958 | sdata->reserved_chanctx = new_ctx; |
959 | sdata->reserved_chandef = *chandef; | |
09332481 | 960 | sdata->reserved_radar_required = radar_required; |
11335a55 LC |
961 | out: |
962 | mutex_unlock(&local->chanctx_mtx); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata, | |
967 | u32 *changed) | |
968 | { | |
969 | struct ieee80211_local *local = sdata->local; | |
970 | struct ieee80211_chanctx *ctx; | |
971 | struct ieee80211_chanctx *old_ctx; | |
972 | struct ieee80211_chanctx_conf *conf; | |
973 | int ret; | |
974 | u32 tmp_changed = *changed; | |
975 | ||
976 | /* TODO: need to recheck if the chandef is usable etc.? */ | |
977 | ||
978 | lockdep_assert_held(&local->mtx); | |
979 | ||
980 | mutex_lock(&local->chanctx_mtx); | |
981 | ||
982 | ctx = sdata->reserved_chanctx; | |
983 | if (WARN_ON(!ctx)) { | |
73da7d5b SW |
984 | ret = -EINVAL; |
985 | goto out; | |
986 | } | |
987 | ||
11335a55 LC |
988 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
989 | lockdep_is_held(&local->chanctx_mtx)); | |
990 | if (!conf) { | |
991 | ret = -EINVAL; | |
992 | goto out; | |
73da7d5b SW |
993 | } |
994 | ||
11335a55 | 995 | old_ctx = container_of(conf, struct ieee80211_chanctx, conf); |
73da7d5b | 996 | |
11335a55 LC |
997 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
998 | tmp_changed |= BSS_CHANGED_BANDWIDTH; | |
999 | ||
1000 | sdata->vif.bss_conf.chandef = sdata->reserved_chandef; | |
1001 | ||
5d52ee81 | 1002 | /* unref our reservation */ |
11335a55 | 1003 | sdata->reserved_chanctx = NULL; |
09332481 | 1004 | sdata->radar_required = sdata->reserved_radar_required; |
e3afb920 | 1005 | list_del(&sdata->reserved_chanctx_list); |
11335a55 | 1006 | |
5d52ee81 LC |
1007 | if (old_ctx == ctx) { |
1008 | /* This is our own context, just change it */ | |
1009 | ret = __ieee80211_vif_change_channel(sdata, old_ctx, | |
1010 | &tmp_changed); | |
1011 | if (ret) | |
1012 | goto out; | |
1013 | } else { | |
1014 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); | |
c0166da9 | 1015 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) |
5d52ee81 LC |
1016 | ieee80211_free_chanctx(local, old_ctx); |
1017 | if (ret) { | |
1018 | /* if assign fails refcount stays the same */ | |
c0166da9 | 1019 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
5d52ee81 LC |
1020 | ieee80211_free_chanctx(local, ctx); |
1021 | goto out; | |
1022 | } | |
11335a55 | 1023 | |
5d52ee81 LC |
1024 | if (sdata->vif.type == NL80211_IFTYPE_AP) |
1025 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1026 | } | |
11335a55 LC |
1027 | |
1028 | *changed = tmp_changed; | |
73da7d5b | 1029 | |
73da7d5b SW |
1030 | ieee80211_recalc_chanctx_chantype(local, ctx); |
1031 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1032 | ieee80211_recalc_radar_chanctx(local, ctx); | |
21f659bf | 1033 | ieee80211_recalc_chanctx_min_def(local, ctx); |
11335a55 | 1034 | out: |
73da7d5b SW |
1035 | mutex_unlock(&local->chanctx_mtx); |
1036 | return ret; | |
1037 | } | |
1038 | ||
2c9b7359 JB |
1039 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1040 | const struct cfg80211_chan_def *chandef, | |
1041 | u32 *changed) | |
1042 | { | |
1043 | struct ieee80211_local *local = sdata->local; | |
1044 | struct ieee80211_chanctx_conf *conf; | |
1045 | struct ieee80211_chanctx *ctx; | |
1046 | int ret; | |
1047 | ||
1048 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1049 | IEEE80211_CHAN_DISABLED)) | |
1050 | return -EINVAL; | |
1051 | ||
1052 | mutex_lock(&local->chanctx_mtx); | |
1053 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1054 | ret = 0; | |
1055 | goto out; | |
1056 | } | |
1057 | ||
1058 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1059 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1060 | ret = -EINVAL; | |
1061 | goto out; | |
1062 | } | |
1063 | ||
1064 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1065 | lockdep_is_held(&local->chanctx_mtx)); | |
1066 | if (!conf) { | |
1067 | ret = -EINVAL; | |
1068 | goto out; | |
1069 | } | |
1070 | ||
1071 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1072 | if (!cfg80211_chandef_compatible(&conf->def, chandef)) { | |
1073 | ret = -EINVAL; | |
1074 | goto out; | |
1075 | } | |
1076 | ||
1077 | sdata->vif.bss_conf.chandef = *chandef; | |
1078 | ||
1079 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1080 | ||
1081 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1082 | ret = 0; | |
1083 | out: | |
1084 | mutex_unlock(&local->chanctx_mtx); | |
1085 | return ret; | |
1086 | } | |
1087 | ||
d01a1e65 MK |
1088 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1089 | { | |
55de908a JB |
1090 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1091 | ||
34a3740d JB |
1092 | lockdep_assert_held(&sdata->local->mtx); |
1093 | ||
d01a1e65 MK |
1094 | mutex_lock(&sdata->local->chanctx_mtx); |
1095 | __ieee80211_vif_release_channel(sdata); | |
1096 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1097 | } | |
3448c005 | 1098 | |
4d76d21b JB |
1099 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1100 | { | |
1101 | struct ieee80211_local *local = sdata->local; | |
1102 | struct ieee80211_sub_if_data *ap; | |
1103 | struct ieee80211_chanctx_conf *conf; | |
1104 | ||
1105 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1106 | return; | |
1107 | ||
1108 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1109 | ||
1110 | mutex_lock(&local->chanctx_mtx); | |
1111 | ||
1112 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1113 | lockdep_is_held(&local->chanctx_mtx)); | |
1114 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1115 | mutex_unlock(&local->chanctx_mtx); | |
1116 | } | |
1117 | ||
3448c005 JB |
1118 | void ieee80211_iter_chan_contexts_atomic( |
1119 | struct ieee80211_hw *hw, | |
1120 | void (*iter)(struct ieee80211_hw *hw, | |
1121 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1122 | void *data), | |
1123 | void *iter_data) | |
1124 | { | |
1125 | struct ieee80211_local *local = hw_to_local(hw); | |
1126 | struct ieee80211_chanctx *ctx; | |
1127 | ||
1128 | rcu_read_lock(); | |
1129 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1130 | if (ctx->driver_present) |
1131 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1132 | rcu_read_unlock(); |
1133 | } | |
1134 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |