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 | ||
5bcae31d MK |
66 | static struct ieee80211_chanctx * |
67 | ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata) | |
68 | { | |
1d4cc30c | 69 | struct ieee80211_local *local __maybe_unused = sdata->local; |
5bcae31d MK |
70 | struct ieee80211_chanctx_conf *conf; |
71 | ||
72 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
73 | lockdep_is_held(&local->chanctx_mtx)); | |
74 | if (!conf) | |
75 | return NULL; | |
76 | ||
77 | return container_of(conf, struct ieee80211_chanctx, conf); | |
78 | } | |
79 | ||
0288157b MK |
80 | static const struct cfg80211_chan_def * |
81 | ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, | |
82 | struct ieee80211_chanctx *ctx, | |
83 | const struct cfg80211_chan_def *compat) | |
84 | { | |
85 | struct ieee80211_sub_if_data *sdata; | |
86 | ||
87 | lockdep_assert_held(&local->chanctx_mtx); | |
88 | ||
89 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
90 | reserved_chanctx_list) { | |
91 | if (!compat) | |
92 | compat = &sdata->reserved_chandef; | |
93 | ||
94 | compat = cfg80211_chandef_compatible(&sdata->reserved_chandef, | |
95 | compat); | |
96 | if (!compat) | |
97 | break; | |
98 | } | |
99 | ||
100 | return compat; | |
101 | } | |
102 | ||
13f348a8 MK |
103 | static const struct cfg80211_chan_def * |
104 | ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, | |
105 | struct ieee80211_chanctx *ctx, | |
106 | const struct cfg80211_chan_def *compat) | |
107 | { | |
108 | struct ieee80211_sub_if_data *sdata; | |
109 | ||
110 | lockdep_assert_held(&local->chanctx_mtx); | |
111 | ||
112 | list_for_each_entry(sdata, &ctx->assigned_vifs, | |
113 | assigned_chanctx_list) { | |
114 | if (sdata->reserved_chanctx != NULL) | |
115 | continue; | |
116 | ||
117 | if (!compat) | |
118 | compat = &sdata->vif.bss_conf.chandef; | |
119 | ||
120 | compat = cfg80211_chandef_compatible( | |
121 | &sdata->vif.bss_conf.chandef, compat); | |
122 | if (!compat) | |
123 | break; | |
124 | } | |
125 | ||
126 | return compat; | |
127 | } | |
128 | ||
129 | static const struct cfg80211_chan_def * | |
130 | ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, | |
131 | struct ieee80211_chanctx *ctx, | |
132 | const struct cfg80211_chan_def *compat) | |
133 | { | |
134 | lockdep_assert_held(&local->chanctx_mtx); | |
135 | ||
136 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); | |
137 | if (!compat) | |
138 | return NULL; | |
139 | ||
140 | compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); | |
141 | if (!compat) | |
142 | return NULL; | |
143 | ||
144 | return compat; | |
145 | } | |
146 | ||
147 | static bool | |
148 | ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, | |
149 | struct ieee80211_chanctx *ctx, | |
150 | const struct cfg80211_chan_def *def) | |
151 | { | |
152 | lockdep_assert_held(&local->chanctx_mtx); | |
153 | ||
154 | if (ieee80211_chanctx_combined_chandef(local, ctx, def)) | |
155 | return true; | |
156 | ||
157 | if (!list_empty(&ctx->reserved_vifs) && | |
158 | ieee80211_chanctx_reserved_chandef(local, ctx, def)) | |
159 | return true; | |
160 | ||
161 | return false; | |
162 | } | |
163 | ||
164 | static struct ieee80211_chanctx * | |
165 | ieee80211_find_reservation_chanctx(struct ieee80211_local *local, | |
166 | const struct cfg80211_chan_def *chandef, | |
167 | enum ieee80211_chanctx_mode mode) | |
168 | { | |
169 | struct ieee80211_chanctx *ctx; | |
170 | ||
171 | lockdep_assert_held(&local->chanctx_mtx); | |
172 | ||
173 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
174 | return NULL; | |
175 | ||
176 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
5bcae31d MK |
177 | if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) |
178 | continue; | |
179 | ||
13f348a8 MK |
180 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
181 | continue; | |
182 | ||
183 | if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, | |
184 | chandef)) | |
185 | continue; | |
186 | ||
187 | return ctx; | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
21f659bf EP |
193 | static enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) |
194 | { | |
195 | switch (sta->bandwidth) { | |
196 | case IEEE80211_STA_RX_BW_20: | |
197 | if (sta->ht_cap.ht_supported) | |
198 | return NL80211_CHAN_WIDTH_20; | |
199 | else | |
200 | return NL80211_CHAN_WIDTH_20_NOHT; | |
201 | case IEEE80211_STA_RX_BW_40: | |
202 | return NL80211_CHAN_WIDTH_40; | |
203 | case IEEE80211_STA_RX_BW_80: | |
204 | return NL80211_CHAN_WIDTH_80; | |
205 | case IEEE80211_STA_RX_BW_160: | |
206 | /* | |
207 | * This applied for both 160 and 80+80. since we use | |
208 | * the returned value to consider degradation of | |
209 | * ctx->conf.min_def, we have to make sure to take | |
210 | * the bigger one (NL80211_CHAN_WIDTH_160). | |
211 | * Otherwise we might try degrading even when not | |
212 | * needed, as the max required sta_bw returned (80+80) | |
213 | * might be smaller than the configured bw (160). | |
214 | */ | |
215 | return NL80211_CHAN_WIDTH_160; | |
216 | default: | |
217 | WARN_ON(1); | |
218 | return NL80211_CHAN_WIDTH_20; | |
219 | } | |
220 | } | |
221 | ||
222 | static enum nl80211_chan_width | |
223 | ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata) | |
224 | { | |
225 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
226 | struct sta_info *sta; | |
227 | ||
228 | rcu_read_lock(); | |
229 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
230 | if (sdata != sta->sdata && | |
231 | !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) | |
232 | continue; | |
233 | ||
234 | if (!sta->uploaded) | |
235 | continue; | |
236 | ||
237 | max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); | |
238 | } | |
239 | rcu_read_unlock(); | |
240 | ||
241 | return max_bw; | |
242 | } | |
243 | ||
244 | static enum nl80211_chan_width | |
245 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
246 | struct ieee80211_chanctx_conf *conf) | |
247 | { | |
248 | struct ieee80211_sub_if_data *sdata; | |
249 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
250 | ||
251 | rcu_read_lock(); | |
252 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
253 | struct ieee80211_vif *vif = &sdata->vif; | |
254 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; | |
255 | ||
256 | if (!ieee80211_sdata_running(sdata)) | |
257 | continue; | |
258 | ||
259 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
260 | continue; | |
261 | ||
262 | switch (vif->type) { | |
263 | case NL80211_IFTYPE_AP: | |
264 | case NL80211_IFTYPE_AP_VLAN: | |
265 | width = ieee80211_get_max_required_bw(sdata); | |
266 | break; | |
267 | case NL80211_IFTYPE_P2P_DEVICE: | |
268 | continue; | |
269 | case NL80211_IFTYPE_STATION: | |
270 | case NL80211_IFTYPE_ADHOC: | |
271 | case NL80211_IFTYPE_WDS: | |
272 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 273 | case NL80211_IFTYPE_OCB: |
21f659bf EP |
274 | width = vif->bss_conf.chandef.width; |
275 | break; | |
276 | case NL80211_IFTYPE_UNSPECIFIED: | |
277 | case NUM_NL80211_IFTYPES: | |
278 | case NL80211_IFTYPE_MONITOR: | |
279 | case NL80211_IFTYPE_P2P_CLIENT: | |
280 | case NL80211_IFTYPE_P2P_GO: | |
281 | WARN_ON_ONCE(1); | |
282 | } | |
283 | max_bw = max(max_bw, width); | |
284 | } | |
1c37a72c EP |
285 | |
286 | /* use the configured bandwidth in case of monitor interface */ | |
287 | sdata = rcu_dereference(local->monitor_sdata); | |
288 | if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf) | |
289 | max_bw = max(max_bw, conf->def.width); | |
290 | ||
21f659bf EP |
291 | rcu_read_unlock(); |
292 | ||
293 | return max_bw; | |
294 | } | |
295 | ||
296 | /* | |
297 | * recalc the min required chan width of the channel context, which is | |
298 | * the max of min required widths of all the interfaces bound to this | |
299 | * channel context. | |
300 | */ | |
301 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
302 | struct ieee80211_chanctx *ctx) | |
303 | { | |
304 | enum nl80211_chan_width max_bw; | |
305 | struct cfg80211_chan_def min_def; | |
306 | ||
307 | lockdep_assert_held(&local->chanctx_mtx); | |
308 | ||
309 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
310 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || | |
311 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
312 | ctx->conf.radar_enabled) { | |
313 | ctx->conf.min_def = ctx->conf.def; | |
314 | return; | |
315 | } | |
316 | ||
317 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
318 | ||
319 | /* downgrade chandef up to max_bw */ | |
320 | min_def = ctx->conf.def; | |
321 | while (min_def.width > max_bw) | |
322 | ieee80211_chandef_downgrade(&min_def); | |
323 | ||
324 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
325 | return; | |
326 | ||
327 | ctx->conf.min_def = min_def; | |
328 | if (!ctx->driver_present) | |
329 | return; | |
330 | ||
331 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH); | |
332 | } | |
333 | ||
18942d3b | 334 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
335 | struct ieee80211_chanctx *ctx, |
336 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 337 | { |
4bf88530 | 338 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) |
e89a96f5 | 339 | return; |
0aaffa9b | 340 | |
4bf88530 JB |
341 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
342 | ||
343 | ctx->conf.def = *chandef; | |
344 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 345 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
346 | |
347 | if (!local->use_chanctx) { | |
675a0b04 | 348 | local->_oper_chandef = *chandef; |
55de908a JB |
349 | ieee80211_hw_config(local, 0); |
350 | } | |
0aaffa9b | 351 | } |
d01a1e65 MK |
352 | |
353 | static struct ieee80211_chanctx * | |
354 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 355 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
356 | enum ieee80211_chanctx_mode mode) |
357 | { | |
358 | struct ieee80211_chanctx *ctx; | |
359 | ||
360 | lockdep_assert_held(&local->chanctx_mtx); | |
361 | ||
362 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
363 | return NULL; | |
d01a1e65 MK |
364 | |
365 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 366 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 367 | |
5bcae31d MK |
368 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
369 | continue; | |
370 | ||
d01a1e65 MK |
371 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
372 | continue; | |
4bf88530 JB |
373 | |
374 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
375 | if (!compat) | |
d01a1e65 MK |
376 | continue; |
377 | ||
0288157b MK |
378 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
379 | compat); | |
380 | if (!compat) | |
381 | continue; | |
382 | ||
18942d3b | 383 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 384 | |
d01a1e65 MK |
385 | return ctx; |
386 | } | |
387 | ||
388 | return NULL; | |
389 | } | |
390 | ||
5cbc95a7 | 391 | bool ieee80211_is_radar_required(struct ieee80211_local *local) |
e4746851 SW |
392 | { |
393 | struct ieee80211_sub_if_data *sdata; | |
394 | ||
cc901de1 MK |
395 | lockdep_assert_held(&local->mtx); |
396 | ||
e4746851 SW |
397 | rcu_read_lock(); |
398 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
399 | if (sdata->radar_required) { | |
400 | rcu_read_unlock(); | |
401 | return true; | |
402 | } | |
403 | } | |
404 | rcu_read_unlock(); | |
405 | ||
406 | return false; | |
407 | } | |
408 | ||
e7f2337a EP |
409 | static bool |
410 | ieee80211_chanctx_radar_required(struct ieee80211_local *local, | |
411 | struct ieee80211_chanctx *ctx) | |
412 | { | |
413 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
414 | struct ieee80211_sub_if_data *sdata; | |
415 | bool required = false; | |
416 | ||
417 | lockdep_assert_held(&local->chanctx_mtx); | |
418 | lockdep_assert_held(&local->mtx); | |
419 | ||
420 | rcu_read_lock(); | |
421 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
422 | if (!ieee80211_sdata_running(sdata)) | |
423 | continue; | |
424 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
425 | continue; | |
426 | if (!sdata->radar_required) | |
427 | continue; | |
428 | ||
429 | required = true; | |
430 | break; | |
431 | } | |
432 | rcu_read_unlock(); | |
433 | ||
434 | return required; | |
435 | } | |
436 | ||
d01a1e65 | 437 | static struct ieee80211_chanctx * |
ed68ebca MK |
438 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
439 | const struct cfg80211_chan_def *chandef, | |
440 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
441 | { |
442 | struct ieee80211_chanctx *ctx; | |
443 | ||
444 | lockdep_assert_held(&local->chanctx_mtx); | |
445 | ||
446 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
447 | if (!ctx) | |
ed68ebca | 448 | return NULL; |
d01a1e65 | 449 | |
484298ad | 450 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 451 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 452 | ctx->conf.def = *chandef; |
04ecd257 JB |
453 | ctx->conf.rx_chains_static = 1; |
454 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 455 | ctx->mode = mode; |
e7f2337a | 456 | ctx->conf.radar_enabled = false; |
21f659bf | 457 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
458 | |
459 | return ctx; | |
460 | } | |
461 | ||
462 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
463 | struct ieee80211_chanctx *ctx) | |
464 | { | |
465 | u32 changed; | |
466 | int err; | |
467 | ||
468 | lockdep_assert_held(&local->mtx); | |
469 | lockdep_assert_held(&local->chanctx_mtx); | |
470 | ||
e4746851 SW |
471 | if (!local->use_chanctx) |
472 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 473 | |
382a103b JB |
474 | /* turn idle off *before* setting channel -- some drivers need that */ |
475 | changed = ieee80211_idle_off(local); | |
476 | if (changed) | |
477 | ieee80211_hw_config(local, changed); | |
478 | ||
55de908a | 479 | if (!local->use_chanctx) { |
ed68ebca | 480 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 481 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
482 | } else { |
483 | err = drv_add_chanctx(local, ctx); | |
484 | if (err) { | |
382a103b | 485 | ieee80211_recalc_idle(local); |
ed68ebca | 486 | return err; |
55de908a | 487 | } |
35f2fce9 MK |
488 | } |
489 | ||
ed68ebca MK |
490 | return 0; |
491 | } | |
492 | ||
493 | static struct ieee80211_chanctx * | |
494 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
495 | const struct cfg80211_chan_def *chandef, | |
496 | enum ieee80211_chanctx_mode mode) | |
497 | { | |
498 | struct ieee80211_chanctx *ctx; | |
499 | int err; | |
d01a1e65 | 500 | |
ed68ebca MK |
501 | lockdep_assert_held(&local->mtx); |
502 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 503 | |
ed68ebca MK |
504 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
505 | if (!ctx) | |
506 | return ERR_PTR(-ENOMEM); | |
507 | ||
508 | err = ieee80211_add_chanctx(local, ctx); | |
509 | if (err) { | |
510 | kfree(ctx); | |
511 | return ERR_PTR(err); | |
512 | } | |
513 | ||
514 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
515 | return ctx; |
516 | } | |
517 | ||
1f0d54cd MK |
518 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
519 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
520 | { |
521 | lockdep_assert_held(&local->chanctx_mtx); | |
522 | ||
55de908a | 523 | if (!local->use_chanctx) { |
675a0b04 KB |
524 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
525 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
526 | chandef->center_freq1 = chandef->chan->center_freq; | |
527 | chandef->center_freq2 = 0; | |
e4746851 SW |
528 | |
529 | /* NOTE: Disabling radar is only valid here for | |
530 | * single channel context. To be sure, check it ... | |
531 | */ | |
1f0d54cd MK |
532 | WARN_ON(local->hw.conf.radar_enabled && |
533 | !list_empty(&local->chanctx_list)); | |
534 | ||
e4746851 SW |
535 | local->hw.conf.radar_enabled = false; |
536 | ||
9b4816f5 | 537 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
538 | } else { |
539 | drv_remove_chanctx(local, ctx); | |
540 | } | |
35f2fce9 | 541 | |
fd0f979a | 542 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
543 | } |
544 | ||
1f0d54cd MK |
545 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
546 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 547 | { |
d01a1e65 MK |
548 | lockdep_assert_held(&local->chanctx_mtx); |
549 | ||
c0166da9 | 550 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 551 | |
1f0d54cd MK |
552 | list_del_rcu(&ctx->list); |
553 | ieee80211_del_chanctx(local, ctx); | |
554 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
555 | } |
556 | ||
4bf88530 JB |
557 | static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
558 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
559 | { |
560 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
561 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 562 | const struct cfg80211_chan_def *compat = NULL; |
e89a96f5 MK |
563 | |
564 | lockdep_assert_held(&local->chanctx_mtx); | |
565 | ||
566 | rcu_read_lock(); | |
567 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 568 | |
e89a96f5 MK |
569 | if (!ieee80211_sdata_running(sdata)) |
570 | continue; | |
571 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
572 | continue; | |
0e67c136 FF |
573 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
574 | continue; | |
e89a96f5 | 575 | |
4bf88530 JB |
576 | if (!compat) |
577 | compat = &sdata->vif.bss_conf.chandef; | |
578 | ||
579 | compat = cfg80211_chandef_compatible( | |
580 | &sdata->vif.bss_conf.chandef, compat); | |
a00f4f6e | 581 | if (WARN_ON_ONCE(!compat)) |
4bf88530 | 582 | break; |
e89a96f5 MK |
583 | } |
584 | rcu_read_unlock(); | |
585 | ||
a00f4f6e | 586 | if (!compat) |
4bf88530 | 587 | return; |
e89a96f5 | 588 | |
18942d3b | 589 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
590 | } |
591 | ||
367bbd10 JB |
592 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
593 | struct ieee80211_chanctx *chanctx) | |
594 | { | |
595 | bool radar_enabled; | |
596 | ||
597 | lockdep_assert_held(&local->chanctx_mtx); | |
5cbc95a7 | 598 | /* for ieee80211_is_radar_required */ |
34a3740d | 599 | lockdep_assert_held(&local->mtx); |
367bbd10 | 600 | |
e7f2337a | 601 | radar_enabled = ieee80211_chanctx_radar_required(local, chanctx); |
367bbd10 JB |
602 | |
603 | if (radar_enabled == chanctx->conf.radar_enabled) | |
604 | return; | |
605 | ||
606 | chanctx->conf.radar_enabled = radar_enabled; | |
367bbd10 JB |
607 | |
608 | if (!local->use_chanctx) { | |
609 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
610 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
611 | } | |
612 | ||
613 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
614 | } | |
615 | ||
77eeba97 LC |
616 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
617 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 618 | { |
35f2fce9 | 619 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
620 | struct ieee80211_chanctx_conf *conf; |
621 | struct ieee80211_chanctx *curr_ctx = NULL; | |
622 | int ret = 0; | |
d01a1e65 | 623 | |
77eeba97 LC |
624 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
625 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 626 | |
77eeba97 LC |
627 | if (conf) { |
628 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 629 | |
77eeba97 LC |
630 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
631 | conf = NULL; | |
484298ad | 632 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 633 | } |
5bbe754d | 634 | |
77eeba97 LC |
635 | if (new_ctx) { |
636 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
637 | if (ret) | |
638 | goto out; | |
fd0f979a | 639 | |
77eeba97 | 640 | conf = &new_ctx->conf; |
484298ad MK |
641 | list_add(&sdata->assigned_chanctx_list, |
642 | &new_ctx->assigned_vifs); | |
77eeba97 | 643 | } |
e89a96f5 | 644 | |
77eeba97 LC |
645 | out: |
646 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 647 | |
77eeba97 LC |
648 | sdata->vif.bss_conf.idle = !conf; |
649 | ||
c0166da9 | 650 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
651 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
652 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
653 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
654 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 655 | } |
e89a96f5 | 656 | |
c0166da9 | 657 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
db82d8a9 | 658 | ieee80211_recalc_txpower(sdata, false); |
77eeba97 | 659 | ieee80211_recalc_chanctx_min_def(local, new_ctx); |
04ecd257 | 660 | } |
77eeba97 LC |
661 | |
662 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
663 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
664 | ieee80211_bss_info_change_notify(sdata, | |
665 | BSS_CHANGED_IDLE); | |
666 | ||
667 | return ret; | |
d01a1e65 MK |
668 | } |
669 | ||
04ecd257 JB |
670 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
671 | struct ieee80211_chanctx *chanctx) | |
672 | { | |
673 | struct ieee80211_sub_if_data *sdata; | |
674 | u8 rx_chains_static, rx_chains_dynamic; | |
675 | ||
676 | lockdep_assert_held(&local->chanctx_mtx); | |
677 | ||
678 | rx_chains_static = 1; | |
679 | rx_chains_dynamic = 1; | |
680 | ||
681 | rcu_read_lock(); | |
682 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
683 | u8 needed_static, needed_dynamic; | |
684 | ||
685 | if (!ieee80211_sdata_running(sdata)) | |
686 | continue; | |
687 | ||
688 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
689 | &chanctx->conf) | |
690 | continue; | |
691 | ||
692 | switch (sdata->vif.type) { | |
693 | case NL80211_IFTYPE_P2P_DEVICE: | |
694 | continue; | |
695 | case NL80211_IFTYPE_STATION: | |
696 | if (!sdata->u.mgd.associated) | |
697 | continue; | |
698 | break; | |
699 | case NL80211_IFTYPE_AP_VLAN: | |
700 | continue; | |
701 | case NL80211_IFTYPE_AP: | |
702 | case NL80211_IFTYPE_ADHOC: | |
703 | case NL80211_IFTYPE_WDS: | |
704 | case NL80211_IFTYPE_MESH_POINT: | |
239281f8 | 705 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
706 | break; |
707 | default: | |
708 | WARN_ON_ONCE(1); | |
709 | } | |
710 | ||
711 | switch (sdata->smps_mode) { | |
712 | default: | |
713 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
714 | sdata->smps_mode); | |
715 | /* fall through */ | |
716 | case IEEE80211_SMPS_OFF: | |
717 | needed_static = sdata->needed_rx_chains; | |
718 | needed_dynamic = sdata->needed_rx_chains; | |
719 | break; | |
720 | case IEEE80211_SMPS_DYNAMIC: | |
721 | needed_static = 1; | |
722 | needed_dynamic = sdata->needed_rx_chains; | |
723 | break; | |
724 | case IEEE80211_SMPS_STATIC: | |
725 | needed_static = 1; | |
726 | needed_dynamic = 1; | |
727 | break; | |
728 | } | |
729 | ||
730 | rx_chains_static = max(rx_chains_static, needed_static); | |
731 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
732 | } | |
7b8a9cdd IY |
733 | |
734 | /* Disable SMPS for the monitor interface */ | |
735 | sdata = rcu_dereference(local->monitor_sdata); | |
736 | if (sdata && | |
737 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
738 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
739 | ||
04ecd257 JB |
740 | rcu_read_unlock(); |
741 | ||
742 | if (!local->use_chanctx) { | |
743 | if (rx_chains_static > 1) | |
744 | local->smps_mode = IEEE80211_SMPS_OFF; | |
745 | else if (rx_chains_dynamic > 1) | |
746 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
747 | else | |
748 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
749 | ieee80211_hw_config(local, 0); | |
750 | } | |
751 | ||
752 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
753 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
754 | return; | |
755 | ||
756 | chanctx->conf.rx_chains_static = rx_chains_static; | |
757 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
758 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
759 | } | |
760 | ||
11335a55 LC |
761 | static void |
762 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
763 | bool clear) | |
764 | { | |
33926eb7 | 765 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
766 | struct ieee80211_sub_if_data *vlan; |
767 | struct ieee80211_chanctx_conf *conf; | |
768 | ||
769 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
770 | return; | |
771 | ||
772 | lockdep_assert_held(&local->mtx); | |
773 | ||
774 | /* Check that conf exists, even when clearing this function | |
775 | * must be called with the AP's channel context still there | |
776 | * as it would otherwise cause VLANs to have an invalid | |
777 | * channel context pointer for a while, possibly pointing | |
778 | * to a channel context that has already been freed. | |
779 | */ | |
780 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 781 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
782 | WARN_ON(!conf); |
783 | ||
784 | if (clear) | |
785 | conf = NULL; | |
786 | ||
787 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
788 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
789 | } | |
790 | ||
791 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
792 | bool clear) | |
793 | { | |
794 | struct ieee80211_local *local = sdata->local; | |
795 | ||
796 | mutex_lock(&local->chanctx_mtx); | |
797 | ||
798 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
799 | ||
800 | mutex_unlock(&local->chanctx_mtx); | |
801 | } | |
802 | ||
803 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
804 | { | |
e3afb920 MK |
805 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
806 | ||
11335a55 LC |
807 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
808 | ||
e3afb920 | 809 | if (WARN_ON(!ctx)) |
73da7d5b SW |
810 | return -EINVAL; |
811 | ||
e3afb920 | 812 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
813 | sdata->reserved_chanctx = NULL; |
814 | ||
5bcae31d MK |
815 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
816 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
817 | if (WARN_ON(!ctx->replace_ctx)) | |
818 | return -EINVAL; | |
819 | ||
820 | WARN_ON(ctx->replace_ctx->replace_state != | |
821 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
822 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
823 | ||
824 | ctx->replace_ctx->replace_ctx = NULL; | |
825 | ctx->replace_ctx->replace_state = | |
826 | IEEE80211_CHANCTX_REPLACE_NONE; | |
827 | ||
828 | list_del_rcu(&ctx->list); | |
829 | kfree_rcu(ctx, rcu_head); | |
830 | } else { | |
831 | ieee80211_free_chanctx(sdata->local, ctx); | |
832 | } | |
833 | } | |
e3afb920 | 834 | |
11335a55 LC |
835 | return 0; |
836 | } | |
837 | ||
838 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
839 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
840 | enum ieee80211_chanctx_mode mode, |
841 | bool radar_required) | |
11335a55 LC |
842 | { |
843 | struct ieee80211_local *local = sdata->local; | |
5bcae31d | 844 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 845 | |
5bcae31d | 846 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 847 | |
5bcae31d MK |
848 | curr_ctx = ieee80211_vif_get_chanctx(sdata); |
849 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) | |
850 | return -ENOTSUPP; | |
11335a55 | 851 | |
13f348a8 | 852 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 853 | if (!new_ctx) { |
5bcae31d | 854 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 855 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
856 | if (IS_ERR(new_ctx)) |
857 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 858 | } else { |
5bcae31d MK |
859 | if (!curr_ctx || |
860 | (curr_ctx->replace_state == | |
861 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
862 | !list_empty(&curr_ctx->reserved_vifs)) { | |
863 | /* | |
864 | * Another vif already requested this context | |
865 | * for a reservation. Find another one hoping | |
866 | * all vifs assigned to it will also switch | |
867 | * soon enough. | |
868 | * | |
869 | * TODO: This needs a little more work as some | |
870 | * cases (more than 2 chanctx capable devices) | |
871 | * may fail which could otherwise succeed | |
872 | * provided some channel context juggling was | |
873 | * performed. | |
874 | * | |
875 | * Consider ctx1..3, vif1..6, each ctx has 2 | |
876 | * vifs. vif1 and vif2 from ctx1 request new | |
877 | * different chandefs starting 2 in-place | |
878 | * reserations with ctx4 and ctx5 replacing | |
879 | * ctx1 and ctx2 respectively. Next vif5 and | |
880 | * vif6 from ctx3 reserve ctx4. If vif3 and | |
881 | * vif4 remain on ctx2 as they are then this | |
882 | * fails unless `replace_ctx` from ctx5 is | |
883 | * replaced with ctx3. | |
884 | */ | |
885 | list_for_each_entry(ctx, &local->chanctx_list, | |
886 | list) { | |
887 | if (ctx->replace_state != | |
888 | IEEE80211_CHANCTX_REPLACE_NONE) | |
889 | continue; | |
890 | ||
891 | if (!list_empty(&ctx->reserved_vifs)) | |
892 | continue; | |
893 | ||
894 | curr_ctx = ctx; | |
895 | break; | |
896 | } | |
897 | } | |
898 | ||
899 | /* | |
900 | * If that's true then all available contexts already | |
901 | * have reservations and cannot be used. | |
902 | */ | |
903 | if (!curr_ctx || | |
904 | (curr_ctx->replace_state == | |
905 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
906 | !list_empty(&curr_ctx->reserved_vifs)) | |
907 | return -EBUSY; | |
908 | ||
909 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
910 | if (!new_ctx) | |
911 | return -ENOMEM; | |
912 | ||
913 | new_ctx->replace_ctx = curr_ctx; | |
914 | new_ctx->replace_state = | |
915 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
916 | ||
917 | curr_ctx->replace_ctx = new_ctx; | |
918 | curr_ctx->replace_state = | |
919 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
920 | ||
921 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
922 | } |
923 | } | |
924 | ||
e3afb920 | 925 | list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); |
11335a55 LC |
926 | sdata->reserved_chanctx = new_ctx; |
927 | sdata->reserved_chandef = *chandef; | |
09332481 | 928 | sdata->reserved_radar_required = radar_required; |
5bcae31d MK |
929 | sdata->reserved_ready = false; |
930 | ||
931 | return 0; | |
11335a55 LC |
932 | } |
933 | ||
03078de4 MK |
934 | static void |
935 | ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) | |
936 | { | |
937 | switch (sdata->vif.type) { | |
938 | case NL80211_IFTYPE_ADHOC: | |
939 | case NL80211_IFTYPE_AP: | |
940 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 941 | case NL80211_IFTYPE_OCB: |
03078de4 MK |
942 | ieee80211_queue_work(&sdata->local->hw, |
943 | &sdata->csa_finalize_work); | |
944 | break; | |
03078de4 | 945 | case NL80211_IFTYPE_STATION: |
4c3ebc56 MK |
946 | ieee80211_queue_work(&sdata->local->hw, |
947 | &sdata->u.mgd.chswitch_work); | |
948 | break; | |
949 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
950 | case NL80211_IFTYPE_AP_VLAN: |
951 | case NL80211_IFTYPE_WDS: | |
952 | case NL80211_IFTYPE_MONITOR: | |
953 | case NL80211_IFTYPE_P2P_CLIENT: | |
954 | case NL80211_IFTYPE_P2P_GO: | |
955 | case NL80211_IFTYPE_P2P_DEVICE: | |
956 | case NUM_NL80211_IFTYPES: | |
957 | WARN_ON(1); | |
958 | break; | |
959 | } | |
960 | } | |
961 | ||
2967e031 FF |
962 | static void |
963 | ieee80211_vif_update_chandef(struct ieee80211_sub_if_data *sdata, | |
964 | const struct cfg80211_chan_def *chandef) | |
965 | { | |
966 | struct ieee80211_sub_if_data *vlan; | |
967 | ||
968 | sdata->vif.bss_conf.chandef = *chandef; | |
969 | ||
970 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
971 | return; | |
972 | ||
973 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
974 | vlan->vif.bss_conf.chandef = *chandef; | |
975 | } | |
976 | ||
5bcae31d MK |
977 | static int |
978 | ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata) | |
11335a55 LC |
979 | { |
980 | struct ieee80211_local *local = sdata->local; | |
5bcae31d MK |
981 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
982 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
983 | const struct cfg80211_chan_def *chandef; | |
984 | u32 changed = 0; | |
985 | int err; | |
11335a55 LC |
986 | |
987 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 988 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 989 | |
5bcae31d MK |
990 | new_ctx = sdata->reserved_chanctx; |
991 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
11335a55 | 992 | |
5bcae31d MK |
993 | if (WARN_ON(!sdata->reserved_ready)) |
994 | return -EBUSY; | |
73da7d5b | 995 | |
5bcae31d MK |
996 | if (WARN_ON(!new_ctx)) |
997 | return -EINVAL; | |
998 | ||
999 | if (WARN_ON(!old_ctx)) | |
1000 | return -EINVAL; | |
1001 | ||
1002 | if (WARN_ON(new_ctx->replace_state == | |
1003 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1004 | return -EINVAL; | |
1005 | ||
1006 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1007 | &sdata->reserved_chandef); | |
1008 | if (WARN_ON(!chandef)) | |
1009 | return -EINVAL; | |
1010 | ||
1011 | vif_chsw[0].vif = &sdata->vif; | |
1012 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1013 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
1014 | ||
1015 | list_del(&sdata->reserved_chanctx_list); | |
1016 | sdata->reserved_chanctx = NULL; | |
1017 | ||
1018 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1019 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1020 | if (err) { | |
1021 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1022 | ieee80211_free_chanctx(local, new_ctx); | |
1023 | ||
03078de4 | 1024 | goto out; |
73da7d5b SW |
1025 | } |
1026 | ||
5bcae31d MK |
1027 | list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs); |
1028 | rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf); | |
1029 | ||
1030 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1031 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1032 | ||
1033 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) | |
1034 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1035 | |
11335a55 | 1036 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
5bcae31d | 1037 | changed = BSS_CHANGED_BANDWIDTH; |
11335a55 | 1038 | |
2967e031 | 1039 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
11335a55 | 1040 | |
722ddb0d EG |
1041 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1042 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
1043 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
1044 | ||
5bcae31d MK |
1045 | if (changed) |
1046 | ieee80211_bss_info_change_notify(sdata, changed); | |
1047 | ||
03078de4 MK |
1048 | out: |
1049 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1050 | return err; |
1051 | } | |
1052 | ||
1053 | static int | |
1054 | ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata) | |
1055 | { | |
1056 | struct ieee80211_local *local = sdata->local; | |
1057 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1058 | const struct cfg80211_chan_def *chandef; | |
1059 | int err; | |
1060 | ||
1061 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1062 | new_ctx = sdata->reserved_chanctx; | |
1063 | ||
1064 | if (WARN_ON(!sdata->reserved_ready)) | |
1065 | return -EINVAL; | |
1066 | ||
1067 | if (WARN_ON(old_ctx)) | |
1068 | return -EINVAL; | |
1069 | ||
1070 | if (WARN_ON(!new_ctx)) | |
1071 | return -EINVAL; | |
1072 | ||
1073 | if (WARN_ON(new_ctx->replace_state == | |
1074 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1075 | return -EINVAL; | |
1076 | ||
1077 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1078 | &sdata->reserved_chandef); | |
1079 | if (WARN_ON(!chandef)) | |
1080 | return -EINVAL; | |
1081 | ||
e3afb920 | 1082 | list_del(&sdata->reserved_chanctx_list); |
5bcae31d | 1083 | sdata->reserved_chanctx = NULL; |
11335a55 | 1084 | |
5bcae31d MK |
1085 | err = ieee80211_assign_vif_chanctx(sdata, new_ctx); |
1086 | if (err) { | |
1087 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1088 | ieee80211_free_chanctx(local, new_ctx); | |
1089 | ||
1090 | goto out; | |
1091 | } | |
1092 | ||
1093 | out: | |
03078de4 | 1094 | ieee80211_vif_chanctx_reservation_complete(sdata); |
5bcae31d MK |
1095 | return err; |
1096 | } | |
1097 | ||
1098 | static bool | |
1099 | ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata) | |
1100 | { | |
1101 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1102 | ||
1103 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1104 | ||
1105 | new_ctx = sdata->reserved_chanctx; | |
1106 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1107 | ||
1108 | if (!old_ctx) | |
1109 | return false; | |
1110 | ||
1111 | if (WARN_ON(!new_ctx)) | |
1112 | return false; | |
1113 | ||
1114 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1115 | return false; | |
1116 | ||
1117 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1118 | return false; | |
1119 | ||
1120 | return true; | |
1121 | } | |
1122 | ||
1123 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1124 | struct ieee80211_chanctx *new_ctx) | |
1125 | { | |
1126 | const struct cfg80211_chan_def *chandef; | |
1127 | ||
1128 | lockdep_assert_held(&local->mtx); | |
1129 | lockdep_assert_held(&local->chanctx_mtx); | |
1130 | ||
1131 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1132 | if (WARN_ON(!chandef)) | |
1133 | return -EINVAL; | |
1134 | ||
1135 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1136 | local->_oper_chandef = *chandef; | |
1137 | ieee80211_hw_config(local, 0); | |
1138 | ||
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1143 | int n_vifs) | |
1144 | { | |
1145 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
1146 | struct ieee80211_sub_if_data *sdata; | |
1147 | struct ieee80211_chanctx *ctx, *old_ctx; | |
1148 | int i, err; | |
1149 | ||
1150 | lockdep_assert_held(&local->mtx); | |
1151 | lockdep_assert_held(&local->chanctx_mtx); | |
1152 | ||
1153 | vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL); | |
1154 | if (!vif_chsw) | |
1155 | return -ENOMEM; | |
1156 | ||
1157 | i = 0; | |
1158 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1159 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1160 | continue; | |
1161 | ||
1162 | if (WARN_ON(!ctx->replace_ctx)) { | |
1163 | err = -EINVAL; | |
5d52ee81 LC |
1164 | goto out; |
1165 | } | |
11335a55 | 1166 | |
5bcae31d MK |
1167 | list_for_each_entry(sdata, &ctx->reserved_vifs, |
1168 | reserved_chanctx_list) { | |
1169 | if (!ieee80211_vif_has_in_place_reservation( | |
1170 | sdata)) | |
1171 | continue; | |
1172 | ||
1173 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1174 | vif_chsw[i].vif = &sdata->vif; | |
1175 | vif_chsw[i].old_ctx = &old_ctx->conf; | |
1176 | vif_chsw[i].new_ctx = &ctx->conf; | |
1177 | ||
1178 | i++; | |
1179 | } | |
5d52ee81 | 1180 | } |
11335a55 | 1181 | |
5bcae31d MK |
1182 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1183 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1184 | |
11335a55 | 1185 | out: |
5bcae31d MK |
1186 | kfree(vif_chsw); |
1187 | return err; | |
1188 | } | |
1189 | ||
1190 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1191 | { | |
1192 | struct ieee80211_chanctx *ctx; | |
1193 | int err; | |
1194 | ||
1195 | lockdep_assert_held(&local->mtx); | |
1196 | lockdep_assert_held(&local->chanctx_mtx); | |
1197 | ||
1198 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1199 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1200 | continue; | |
1201 | ||
1202 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1203 | continue; | |
1204 | ||
1205 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1206 | err = ieee80211_add_chanctx(local, ctx); | |
1207 | if (err) | |
1208 | goto err; | |
1209 | } | |
1210 | ||
1211 | return 0; | |
1212 | ||
1213 | err: | |
1214 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1215 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1216 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1217 | continue; | |
1218 | ||
1219 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1220 | continue; | |
1221 | ||
1222 | ieee80211_del_chanctx(local, ctx); | |
1223 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1224 | } | |
1225 | ||
1226 | return err; | |
1227 | } | |
1228 | ||
649b2a4d | 1229 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d MK |
1230 | { |
1231 | struct ieee80211_sub_if_data *sdata, *sdata_tmp; | |
1232 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; | |
1233 | struct ieee80211_chanctx *new_ctx = NULL; | |
1234 | int i, err, n_assigned, n_reserved, n_ready; | |
1235 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; | |
1236 | ||
1237 | lockdep_assert_held(&local->mtx); | |
1238 | lockdep_assert_held(&local->chanctx_mtx); | |
1239 | ||
1240 | /* | |
1241 | * If there are 2 independent pairs of channel contexts performing | |
1242 | * cross-switch of their vifs this code will still wait until both are | |
1243 | * ready even though it could be possible to switch one before the | |
1244 | * other is ready. | |
1245 | * | |
1246 | * For practical reasons and code simplicity just do a single huge | |
1247 | * switch. | |
1248 | */ | |
1249 | ||
1250 | /* | |
1251 | * Verify if the reservation is still feasible. | |
1252 | * - if it's not then disconnect | |
1253 | * - if it is but not all vifs necessary are ready then defer | |
1254 | */ | |
1255 | ||
1256 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1257 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1258 | continue; | |
1259 | ||
1260 | if (WARN_ON(!ctx->replace_ctx)) { | |
1261 | err = -EINVAL; | |
1262 | goto err; | |
1263 | } | |
1264 | ||
1265 | if (!local->use_chanctx) | |
1266 | new_ctx = ctx; | |
1267 | ||
1268 | n_ctx++; | |
1269 | ||
1270 | n_assigned = 0; | |
1271 | n_reserved = 0; | |
1272 | n_ready = 0; | |
1273 | ||
1274 | list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs, | |
1275 | assigned_chanctx_list) { | |
1276 | n_assigned++; | |
1277 | if (sdata->reserved_chanctx) { | |
1278 | n_reserved++; | |
1279 | if (sdata->reserved_ready) | |
1280 | n_ready++; | |
1281 | } | |
1282 | } | |
1283 | ||
1284 | if (n_assigned != n_reserved) { | |
1285 | if (n_ready == n_reserved) { | |
1286 | wiphy_info(local->hw.wiphy, | |
1287 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1288 | err = -EBUSY; | |
1289 | goto err; | |
1290 | } | |
1291 | ||
1292 | return -EAGAIN; | |
1293 | } | |
1294 | ||
1295 | ctx->conf.radar_enabled = false; | |
1296 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1297 | reserved_chanctx_list) { | |
1298 | if (ieee80211_vif_has_in_place_reservation(sdata) && | |
1299 | !sdata->reserved_ready) | |
1300 | return -EAGAIN; | |
1301 | ||
1302 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1303 | if (old_ctx) { | |
1304 | if (old_ctx->replace_state == | |
1305 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1306 | n_vifs_switch++; | |
1307 | else | |
1308 | n_vifs_assign++; | |
1309 | } else { | |
1310 | n_vifs_ctxless++; | |
1311 | } | |
1312 | ||
1313 | if (sdata->reserved_radar_required) | |
1314 | ctx->conf.radar_enabled = true; | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | if (WARN_ON(n_ctx == 0) || | |
1319 | WARN_ON(n_vifs_switch == 0 && | |
1320 | n_vifs_assign == 0 && | |
1321 | n_vifs_ctxless == 0) || | |
1322 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1323 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1324 | err = -EINVAL; | |
1325 | goto err; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * All necessary vifs are ready. Perform the switch now depending on | |
1330 | * reservations and driver capabilities. | |
1331 | */ | |
1332 | ||
1333 | if (local->use_chanctx) { | |
1334 | if (n_vifs_switch > 0) { | |
1335 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1336 | if (err) | |
1337 | goto err; | |
1338 | } | |
1339 | ||
1340 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1341 | err = ieee80211_chsw_switch_ctxs(local); | |
1342 | if (err) | |
1343 | goto err; | |
1344 | } | |
1345 | } else { | |
1346 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1347 | if (err) | |
1348 | goto err; | |
1349 | } | |
1350 | ||
1351 | /* | |
1352 | * Update all structures, values and pointers to point to new channel | |
1353 | * context(s). | |
1354 | */ | |
1355 | ||
1356 | i = 0; | |
1357 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1358 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1359 | continue; | |
1360 | ||
1361 | if (WARN_ON(!ctx->replace_ctx)) { | |
1362 | err = -EINVAL; | |
1363 | goto err; | |
1364 | } | |
1365 | ||
1366 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1367 | reserved_chanctx_list) { | |
1368 | u32 changed = 0; | |
1369 | ||
1370 | if (!ieee80211_vif_has_in_place_reservation(sdata)) | |
1371 | continue; | |
1372 | ||
1373 | rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); | |
1374 | ||
1375 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1376 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, | |
1377 | false); | |
1378 | ||
1379 | sdata->radar_required = sdata->reserved_radar_required; | |
1380 | ||
1381 | if (sdata->vif.bss_conf.chandef.width != | |
1382 | sdata->reserved_chandef.width) | |
1383 | changed = BSS_CHANGED_BANDWIDTH; | |
1384 | ||
2967e031 | 1385 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
5bcae31d MK |
1386 | if (changed) |
1387 | ieee80211_bss_info_change_notify(sdata, | |
1388 | changed); | |
1389 | ||
db82d8a9 | 1390 | ieee80211_recalc_txpower(sdata, false); |
5bcae31d MK |
1391 | } |
1392 | ||
1393 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1394 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1395 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1396 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1397 | ||
1398 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1399 | reserved_chanctx_list) { | |
1400 | if (ieee80211_vif_get_chanctx(sdata) != ctx) | |
1401 | continue; | |
1402 | ||
1403 | list_del(&sdata->reserved_chanctx_list); | |
1404 | list_move(&sdata->assigned_chanctx_list, | |
47e4df94 | 1405 | &ctx->assigned_vifs); |
5bcae31d | 1406 | sdata->reserved_chanctx = NULL; |
03078de4 MK |
1407 | |
1408 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1409 | } |
1410 | ||
1411 | /* | |
1412 | * This context might have been a dependency for an already | |
1413 | * ready re-assign reservation interface that was deferred. Do | |
1414 | * not propagate error to the caller though. The in-place | |
1415 | * reservation for originally requested interface has already | |
1416 | * succeeded at this point. | |
1417 | */ | |
1418 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1419 | reserved_chanctx_list) { | |
1420 | if (WARN_ON(ieee80211_vif_has_in_place_reservation( | |
1421 | sdata))) | |
1422 | continue; | |
1423 | ||
1424 | if (WARN_ON(sdata->reserved_chanctx != ctx)) | |
1425 | continue; | |
1426 | ||
1427 | if (!sdata->reserved_ready) | |
1428 | continue; | |
1429 | ||
1430 | if (ieee80211_vif_get_chanctx(sdata)) | |
1431 | err = ieee80211_vif_use_reserved_reassign( | |
1432 | sdata); | |
1433 | else | |
1434 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1435 | ||
1436 | if (err) { | |
1437 | sdata_info(sdata, | |
1438 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1439 | err); | |
1440 | ieee80211_vif_unreserve_chanctx(sdata); | |
1441 | cfg80211_stop_iface(local->hw.wiphy, | |
1442 | &sdata->wdev, | |
1443 | GFP_KERNEL); | |
1444 | } | |
1445 | } | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * Finally free old contexts | |
1450 | */ | |
1451 | ||
1452 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1453 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1454 | continue; | |
1455 | ||
1456 | ctx->replace_ctx->replace_ctx = NULL; | |
1457 | ctx->replace_ctx->replace_state = | |
1458 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1459 | ||
1460 | list_del_rcu(&ctx->list); | |
1461 | kfree_rcu(ctx, rcu_head); | |
1462 | } | |
1463 | ||
1464 | return 0; | |
1465 | ||
1466 | err: | |
1467 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1468 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1469 | continue; | |
1470 | ||
1471 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
03078de4 | 1472 | reserved_chanctx_list) { |
5bcae31d | 1473 | ieee80211_vif_unreserve_chanctx(sdata); |
03078de4 MK |
1474 | ieee80211_vif_chanctx_reservation_complete(sdata); |
1475 | } | |
5bcae31d MK |
1476 | } |
1477 | ||
1478 | return err; | |
1479 | } | |
1480 | ||
649b2a4d JB |
1481 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1482 | { | |
1483 | struct ieee80211_local *local = sdata->local; | |
1484 | struct ieee80211_chanctx_conf *conf; | |
1485 | struct ieee80211_chanctx *ctx; | |
1486 | bool use_reserved_switch = false; | |
1487 | ||
1488 | lockdep_assert_held(&local->chanctx_mtx); | |
1489 | ||
1490 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1491 | lockdep_is_held(&local->chanctx_mtx)); | |
1492 | if (!conf) | |
1493 | return; | |
1494 | ||
1495 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1496 | ||
1497 | if (sdata->reserved_chanctx) { | |
1498 | if (sdata->reserved_chanctx->replace_state == | |
1499 | IEEE80211_CHANCTX_REPLACES_OTHER && | |
1500 | ieee80211_chanctx_num_reserved(local, | |
1501 | sdata->reserved_chanctx) > 1) | |
1502 | use_reserved_switch = true; | |
1503 | ||
1504 | ieee80211_vif_unreserve_chanctx(sdata); | |
1505 | } | |
1506 | ||
1507 | ieee80211_assign_vif_chanctx(sdata, NULL); | |
1508 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1509 | ieee80211_free_chanctx(local, ctx); | |
1510 | ||
104f5a62 EP |
1511 | sdata->radar_required = false; |
1512 | ||
649b2a4d JB |
1513 | /* Unreserving may ready an in-place reservation. */ |
1514 | if (use_reserved_switch) | |
1515 | ieee80211_vif_use_reserved_switch(local); | |
1516 | } | |
1517 | ||
1518 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, | |
1519 | const struct cfg80211_chan_def *chandef, | |
1520 | enum ieee80211_chanctx_mode mode) | |
1521 | { | |
1522 | struct ieee80211_local *local = sdata->local; | |
1523 | struct ieee80211_chanctx *ctx; | |
1524 | u8 radar_detect_width = 0; | |
1525 | int ret; | |
1526 | ||
1527 | lockdep_assert_held(&local->mtx); | |
1528 | ||
1529 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); | |
1530 | ||
1531 | mutex_lock(&local->chanctx_mtx); | |
1532 | ||
1533 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1534 | chandef, | |
1535 | sdata->wdev.iftype); | |
1536 | if (ret < 0) | |
1537 | goto out; | |
1538 | if (ret > 0) | |
1539 | radar_detect_width = BIT(chandef->width); | |
1540 | ||
1541 | sdata->radar_required = ret; | |
1542 | ||
1543 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1544 | radar_detect_width); | |
1545 | if (ret < 0) | |
1546 | goto out; | |
1547 | ||
1548 | __ieee80211_vif_release_channel(sdata); | |
1549 | ||
1550 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1551 | if (!ctx) | |
1552 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1553 | if (IS_ERR(ctx)) { | |
1554 | ret = PTR_ERR(ctx); | |
1555 | goto out; | |
1556 | } | |
1557 | ||
2967e031 | 1558 | ieee80211_vif_update_chandef(sdata, chandef); |
649b2a4d JB |
1559 | |
1560 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); | |
1561 | if (ret) { | |
1562 | /* if assign fails refcount stays the same */ | |
1563 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1564 | ieee80211_free_chanctx(local, ctx); | |
1565 | goto out; | |
1566 | } | |
1567 | ||
1568 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1569 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1570 | out: | |
104f5a62 EP |
1571 | if (ret) |
1572 | sdata->radar_required = false; | |
1573 | ||
649b2a4d JB |
1574 | mutex_unlock(&local->chanctx_mtx); |
1575 | return ret; | |
1576 | } | |
1577 | ||
5bcae31d MK |
1578 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata) |
1579 | { | |
1580 | struct ieee80211_local *local = sdata->local; | |
1581 | struct ieee80211_chanctx *new_ctx; | |
1582 | struct ieee80211_chanctx *old_ctx; | |
1583 | int err; | |
1584 | ||
1585 | lockdep_assert_held(&local->mtx); | |
1586 | lockdep_assert_held(&local->chanctx_mtx); | |
1587 | ||
1588 | new_ctx = sdata->reserved_chanctx; | |
1589 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1590 | ||
1591 | if (WARN_ON(!new_ctx)) | |
1592 | return -EINVAL; | |
1593 | ||
1594 | if (WARN_ON(new_ctx->replace_state == | |
1595 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1596 | return -EINVAL; | |
1597 | ||
1598 | if (WARN_ON(sdata->reserved_ready)) | |
1599 | return -EINVAL; | |
1600 | ||
1601 | sdata->reserved_ready = true; | |
1602 | ||
1603 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1604 | if (old_ctx) | |
1605 | err = ieee80211_vif_use_reserved_reassign(sdata); | |
1606 | else | |
1607 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1608 | ||
1609 | if (err) | |
1610 | return err; | |
1611 | } | |
1612 | ||
1613 | /* | |
1614 | * In-place reservation may need to be finalized now either if: | |
1615 | * a) sdata is taking part in the swapping itself and is the last one | |
1616 | * b) sdata has switched with a re-assign reservation to an existing | |
1617 | * context readying in-place switching of old_ctx | |
1618 | * | |
1619 | * In case of (b) do not propagate the error up because the requested | |
1620 | * sdata already switched successfully. Just spill an extra warning. | |
1621 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1622 | * interfaces upon failure. | |
1623 | */ | |
1624 | if ((old_ctx && | |
1625 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1626 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1627 | err = ieee80211_vif_use_reserved_switch(local); | |
1628 | if (err && err != -EAGAIN) { | |
1629 | if (new_ctx->replace_state == | |
1630 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1631 | return err; | |
1632 | ||
1633 | wiphy_info(local->hw.wiphy, | |
1634 | "depending in-place reservation failed (err=%d)\n", | |
1635 | err); | |
1636 | } | |
1637 | } | |
1638 | ||
1639 | return 0; | |
73da7d5b SW |
1640 | } |
1641 | ||
2c9b7359 JB |
1642 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1643 | const struct cfg80211_chan_def *chandef, | |
1644 | u32 *changed) | |
1645 | { | |
1646 | struct ieee80211_local *local = sdata->local; | |
1647 | struct ieee80211_chanctx_conf *conf; | |
1648 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1649 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1650 | int ret; |
1651 | ||
1652 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1653 | IEEE80211_CHAN_DISABLED)) | |
1654 | return -EINVAL; | |
1655 | ||
1656 | mutex_lock(&local->chanctx_mtx); | |
1657 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1658 | ret = 0; | |
1659 | goto out; | |
1660 | } | |
1661 | ||
1662 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1663 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1664 | ret = -EINVAL; | |
1665 | goto out; | |
1666 | } | |
1667 | ||
1668 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1669 | lockdep_is_held(&local->chanctx_mtx)); | |
1670 | if (!conf) { | |
1671 | ret = -EINVAL; | |
1672 | goto out; | |
1673 | } | |
1674 | ||
1675 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1676 | |
1677 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1678 | if (!compat) { | |
2c9b7359 JB |
1679 | ret = -EINVAL; |
1680 | goto out; | |
1681 | } | |
1682 | ||
5bcae31d MK |
1683 | switch (ctx->replace_state) { |
1684 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1685 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1686 | ret = -EBUSY; | |
1687 | goto out; | |
1688 | } | |
1689 | break; | |
1690 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1691 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1692 | * reservation itself? */ |
1693 | ret = -EBUSY; | |
1694 | goto out; | |
1695 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1696 | /* channel context that is going to replace another channel | |
1697 | * context doesn't really exist and shouldn't be assigned | |
1698 | * anywhere yet */ | |
1699 | WARN_ON(1); | |
1700 | break; | |
1701 | } | |
1702 | ||
2967e031 | 1703 | ieee80211_vif_update_chandef(sdata, chandef); |
2c9b7359 JB |
1704 | |
1705 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1706 | ||
1707 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1708 | ret = 0; | |
1709 | out: | |
1710 | mutex_unlock(&local->chanctx_mtx); | |
1711 | return ret; | |
1712 | } | |
1713 | ||
d01a1e65 MK |
1714 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1715 | { | |
55de908a JB |
1716 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1717 | ||
34a3740d JB |
1718 | lockdep_assert_held(&sdata->local->mtx); |
1719 | ||
d01a1e65 MK |
1720 | mutex_lock(&sdata->local->chanctx_mtx); |
1721 | __ieee80211_vif_release_channel(sdata); | |
1722 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1723 | } | |
3448c005 | 1724 | |
4d76d21b JB |
1725 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1726 | { | |
1727 | struct ieee80211_local *local = sdata->local; | |
1728 | struct ieee80211_sub_if_data *ap; | |
1729 | struct ieee80211_chanctx_conf *conf; | |
1730 | ||
1731 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1732 | return; | |
1733 | ||
1734 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1735 | ||
1736 | mutex_lock(&local->chanctx_mtx); | |
1737 | ||
1738 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1739 | lockdep_is_held(&local->chanctx_mtx)); | |
1740 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1741 | mutex_unlock(&local->chanctx_mtx); | |
1742 | } | |
1743 | ||
3448c005 JB |
1744 | void ieee80211_iter_chan_contexts_atomic( |
1745 | struct ieee80211_hw *hw, | |
1746 | void (*iter)(struct ieee80211_hw *hw, | |
1747 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1748 | void *data), | |
1749 | void *iter_data) | |
1750 | { | |
1751 | struct ieee80211_local *local = hw_to_local(hw); | |
1752 | struct ieee80211_chanctx *ctx; | |
1753 | ||
1754 | rcu_read_lock(); | |
1755 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1756 | if (ctx->driver_present) |
1757 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1758 | rcu_read_unlock(); |
1759 | } | |
1760 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |