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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 | ||
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 | ||
0fabfaaf | 193 | enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) |
21f659bf EP |
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 | ||
a7201a6c | 234 | if (!sta->uploaded || !test_sta_flag(sta, WLAN_STA_ASSOC)) |
21f659bf EP |
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; | |
0fabfaaf AN |
267 | case NL80211_IFTYPE_STATION: |
268 | /* | |
269 | * The ap's sta->bandwidth is not set yet at this | |
270 | * point, so take the width from the chandef, but | |
271 | * account also for TDLS peers | |
272 | */ | |
273 | width = max(vif->bss_conf.chandef.width, | |
274 | ieee80211_get_max_required_bw(sdata)); | |
275 | break; | |
21f659bf | 276 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 277 | case NL80211_IFTYPE_NAN: |
21f659bf | 278 | continue; |
21f659bf EP |
279 | case NL80211_IFTYPE_ADHOC: |
280 | case NL80211_IFTYPE_WDS: | |
281 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 282 | case NL80211_IFTYPE_OCB: |
21f659bf EP |
283 | width = vif->bss_conf.chandef.width; |
284 | break; | |
285 | case NL80211_IFTYPE_UNSPECIFIED: | |
286 | case NUM_NL80211_IFTYPES: | |
287 | case NL80211_IFTYPE_MONITOR: | |
288 | case NL80211_IFTYPE_P2P_CLIENT: | |
289 | case NL80211_IFTYPE_P2P_GO: | |
290 | WARN_ON_ONCE(1); | |
291 | } | |
292 | max_bw = max(max_bw, width); | |
293 | } | |
1c37a72c EP |
294 | |
295 | /* use the configured bandwidth in case of monitor interface */ | |
296 | sdata = rcu_dereference(local->monitor_sdata); | |
297 | if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf) | |
298 | max_bw = max(max_bw, conf->def.width); | |
299 | ||
21f659bf EP |
300 | rcu_read_unlock(); |
301 | ||
302 | return max_bw; | |
303 | } | |
304 | ||
305 | /* | |
306 | * recalc the min required chan width of the channel context, which is | |
307 | * the max of min required widths of all the interfaces bound to this | |
308 | * channel context. | |
309 | */ | |
310 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
311 | struct ieee80211_chanctx *ctx) | |
312 | { | |
313 | enum nl80211_chan_width max_bw; | |
314 | struct cfg80211_chan_def min_def; | |
315 | ||
316 | lockdep_assert_held(&local->chanctx_mtx); | |
317 | ||
318 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
319 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || | |
320 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
321 | ctx->conf.radar_enabled) { | |
322 | ctx->conf.min_def = ctx->conf.def; | |
323 | return; | |
324 | } | |
325 | ||
326 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
327 | ||
328 | /* downgrade chandef up to max_bw */ | |
329 | min_def = ctx->conf.def; | |
330 | while (min_def.width > max_bw) | |
331 | ieee80211_chandef_downgrade(&min_def); | |
332 | ||
333 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
334 | return; | |
335 | ||
336 | ctx->conf.min_def = min_def; | |
337 | if (!ctx->driver_present) | |
338 | return; | |
339 | ||
340 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH); | |
341 | } | |
342 | ||
18942d3b | 343 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
344 | struct ieee80211_chanctx *ctx, |
345 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 346 | { |
aa507a7b AN |
347 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) { |
348 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
e89a96f5 | 349 | return; |
aa507a7b | 350 | } |
0aaffa9b | 351 | |
4bf88530 JB |
352 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
353 | ||
354 | ctx->conf.def = *chandef; | |
355 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 356 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
357 | |
358 | if (!local->use_chanctx) { | |
675a0b04 | 359 | local->_oper_chandef = *chandef; |
55de908a JB |
360 | ieee80211_hw_config(local, 0); |
361 | } | |
0aaffa9b | 362 | } |
d01a1e65 MK |
363 | |
364 | static struct ieee80211_chanctx * | |
365 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 366 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
367 | enum ieee80211_chanctx_mode mode) |
368 | { | |
369 | struct ieee80211_chanctx *ctx; | |
370 | ||
371 | lockdep_assert_held(&local->chanctx_mtx); | |
372 | ||
373 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
374 | return NULL; | |
d01a1e65 MK |
375 | |
376 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 377 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 378 | |
5bcae31d MK |
379 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
380 | continue; | |
381 | ||
d01a1e65 MK |
382 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
383 | continue; | |
4bf88530 JB |
384 | |
385 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
386 | if (!compat) | |
d01a1e65 MK |
387 | continue; |
388 | ||
0288157b MK |
389 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
390 | compat); | |
391 | if (!compat) | |
392 | continue; | |
393 | ||
18942d3b | 394 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 395 | |
d01a1e65 MK |
396 | return ctx; |
397 | } | |
398 | ||
399 | return NULL; | |
400 | } | |
401 | ||
5cbc95a7 | 402 | bool ieee80211_is_radar_required(struct ieee80211_local *local) |
e4746851 SW |
403 | { |
404 | struct ieee80211_sub_if_data *sdata; | |
405 | ||
cc901de1 MK |
406 | lockdep_assert_held(&local->mtx); |
407 | ||
e4746851 SW |
408 | rcu_read_lock(); |
409 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
410 | if (sdata->radar_required) { | |
411 | rcu_read_unlock(); | |
412 | return true; | |
413 | } | |
414 | } | |
415 | rcu_read_unlock(); | |
416 | ||
417 | return false; | |
418 | } | |
419 | ||
e7f2337a EP |
420 | static bool |
421 | ieee80211_chanctx_radar_required(struct ieee80211_local *local, | |
422 | struct ieee80211_chanctx *ctx) | |
423 | { | |
424 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
425 | struct ieee80211_sub_if_data *sdata; | |
426 | bool required = false; | |
427 | ||
428 | lockdep_assert_held(&local->chanctx_mtx); | |
429 | lockdep_assert_held(&local->mtx); | |
430 | ||
431 | rcu_read_lock(); | |
432 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
433 | if (!ieee80211_sdata_running(sdata)) | |
434 | continue; | |
435 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
436 | continue; | |
437 | if (!sdata->radar_required) | |
438 | continue; | |
439 | ||
440 | required = true; | |
441 | break; | |
442 | } | |
443 | rcu_read_unlock(); | |
444 | ||
445 | return required; | |
446 | } | |
447 | ||
d01a1e65 | 448 | static struct ieee80211_chanctx * |
ed68ebca MK |
449 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
450 | const struct cfg80211_chan_def *chandef, | |
451 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
452 | { |
453 | struct ieee80211_chanctx *ctx; | |
454 | ||
455 | lockdep_assert_held(&local->chanctx_mtx); | |
456 | ||
457 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
458 | if (!ctx) | |
ed68ebca | 459 | return NULL; |
d01a1e65 | 460 | |
484298ad | 461 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 462 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 463 | ctx->conf.def = *chandef; |
04ecd257 JB |
464 | ctx->conf.rx_chains_static = 1; |
465 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 466 | ctx->mode = mode; |
e7f2337a | 467 | ctx->conf.radar_enabled = false; |
21f659bf | 468 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
469 | |
470 | return ctx; | |
471 | } | |
472 | ||
473 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
474 | struct ieee80211_chanctx *ctx) | |
475 | { | |
476 | u32 changed; | |
477 | int err; | |
478 | ||
479 | lockdep_assert_held(&local->mtx); | |
480 | lockdep_assert_held(&local->chanctx_mtx); | |
481 | ||
e4746851 SW |
482 | if (!local->use_chanctx) |
483 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 484 | |
382a103b JB |
485 | /* turn idle off *before* setting channel -- some drivers need that */ |
486 | changed = ieee80211_idle_off(local); | |
487 | if (changed) | |
488 | ieee80211_hw_config(local, changed); | |
489 | ||
55de908a | 490 | if (!local->use_chanctx) { |
ed68ebca | 491 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 492 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
493 | } else { |
494 | err = drv_add_chanctx(local, ctx); | |
495 | if (err) { | |
382a103b | 496 | ieee80211_recalc_idle(local); |
ed68ebca | 497 | return err; |
55de908a | 498 | } |
35f2fce9 MK |
499 | } |
500 | ||
ed68ebca MK |
501 | return 0; |
502 | } | |
503 | ||
504 | static struct ieee80211_chanctx * | |
505 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
506 | const struct cfg80211_chan_def *chandef, | |
507 | enum ieee80211_chanctx_mode mode) | |
508 | { | |
509 | struct ieee80211_chanctx *ctx; | |
510 | int err; | |
d01a1e65 | 511 | |
ed68ebca MK |
512 | lockdep_assert_held(&local->mtx); |
513 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 514 | |
ed68ebca MK |
515 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
516 | if (!ctx) | |
517 | return ERR_PTR(-ENOMEM); | |
518 | ||
519 | err = ieee80211_add_chanctx(local, ctx); | |
520 | if (err) { | |
521 | kfree(ctx); | |
522 | return ERR_PTR(err); | |
523 | } | |
524 | ||
525 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
526 | return ctx; |
527 | } | |
528 | ||
1f0d54cd MK |
529 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
530 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
531 | { |
532 | lockdep_assert_held(&local->chanctx_mtx); | |
533 | ||
55de908a | 534 | if (!local->use_chanctx) { |
675a0b04 KB |
535 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
536 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
537 | chandef->center_freq1 = chandef->chan->center_freq; | |
538 | chandef->center_freq2 = 0; | |
e4746851 SW |
539 | |
540 | /* NOTE: Disabling radar is only valid here for | |
541 | * single channel context. To be sure, check it ... | |
542 | */ | |
1f0d54cd MK |
543 | WARN_ON(local->hw.conf.radar_enabled && |
544 | !list_empty(&local->chanctx_list)); | |
545 | ||
e4746851 SW |
546 | local->hw.conf.radar_enabled = false; |
547 | ||
9b4816f5 | 548 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
549 | } else { |
550 | drv_remove_chanctx(local, ctx); | |
551 | } | |
35f2fce9 | 552 | |
fd0f979a | 553 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
554 | } |
555 | ||
1f0d54cd MK |
556 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
557 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 558 | { |
d01a1e65 MK |
559 | lockdep_assert_held(&local->chanctx_mtx); |
560 | ||
c0166da9 | 561 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 562 | |
1f0d54cd MK |
563 | list_del_rcu(&ctx->list); |
564 | ieee80211_del_chanctx(local, ctx); | |
565 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
566 | } |
567 | ||
0fabfaaf AN |
568 | void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
569 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
570 | { |
571 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
572 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 573 | const struct cfg80211_chan_def *compat = NULL; |
0fabfaaf | 574 | struct sta_info *sta; |
e89a96f5 MK |
575 | |
576 | lockdep_assert_held(&local->chanctx_mtx); | |
577 | ||
578 | rcu_read_lock(); | |
579 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 580 | |
e89a96f5 MK |
581 | if (!ieee80211_sdata_running(sdata)) |
582 | continue; | |
583 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
584 | continue; | |
0e67c136 FF |
585 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
586 | continue; | |
e89a96f5 | 587 | |
4bf88530 JB |
588 | if (!compat) |
589 | compat = &sdata->vif.bss_conf.chandef; | |
590 | ||
591 | compat = cfg80211_chandef_compatible( | |
592 | &sdata->vif.bss_conf.chandef, compat); | |
a00f4f6e | 593 | if (WARN_ON_ONCE(!compat)) |
4bf88530 | 594 | break; |
e89a96f5 | 595 | } |
0fabfaaf AN |
596 | |
597 | /* TDLS peers can sometimes affect the chandef width */ | |
598 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
599 | if (!sta->uploaded || | |
600 | !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) || | |
601 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
602 | !sta->tdls_chandef.chan) | |
603 | continue; | |
604 | ||
605 | compat = cfg80211_chandef_compatible(&sta->tdls_chandef, | |
606 | compat); | |
607 | if (WARN_ON_ONCE(!compat)) | |
608 | break; | |
609 | } | |
e89a96f5 MK |
610 | rcu_read_unlock(); |
611 | ||
a00f4f6e | 612 | if (!compat) |
4bf88530 | 613 | return; |
e89a96f5 | 614 | |
18942d3b | 615 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
616 | } |
617 | ||
367bbd10 JB |
618 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
619 | struct ieee80211_chanctx *chanctx) | |
620 | { | |
621 | bool radar_enabled; | |
622 | ||
623 | lockdep_assert_held(&local->chanctx_mtx); | |
5cbc95a7 | 624 | /* for ieee80211_is_radar_required */ |
34a3740d | 625 | lockdep_assert_held(&local->mtx); |
367bbd10 | 626 | |
e7f2337a | 627 | radar_enabled = ieee80211_chanctx_radar_required(local, chanctx); |
367bbd10 JB |
628 | |
629 | if (radar_enabled == chanctx->conf.radar_enabled) | |
630 | return; | |
631 | ||
632 | chanctx->conf.radar_enabled = radar_enabled; | |
367bbd10 JB |
633 | |
634 | if (!local->use_chanctx) { | |
635 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
636 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
637 | } | |
638 | ||
639 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
640 | } | |
641 | ||
77eeba97 LC |
642 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
643 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 644 | { |
35f2fce9 | 645 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
646 | struct ieee80211_chanctx_conf *conf; |
647 | struct ieee80211_chanctx *curr_ctx = NULL; | |
648 | int ret = 0; | |
d01a1e65 | 649 | |
708d50ed AB |
650 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN)) |
651 | return -ENOTSUPP; | |
652 | ||
77eeba97 LC |
653 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
654 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 655 | |
77eeba97 LC |
656 | if (conf) { |
657 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 658 | |
77eeba97 LC |
659 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
660 | conf = NULL; | |
484298ad | 661 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 662 | } |
5bbe754d | 663 | |
77eeba97 LC |
664 | if (new_ctx) { |
665 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
666 | if (ret) | |
667 | goto out; | |
fd0f979a | 668 | |
77eeba97 | 669 | conf = &new_ctx->conf; |
484298ad MK |
670 | list_add(&sdata->assigned_chanctx_list, |
671 | &new_ctx->assigned_vifs); | |
77eeba97 | 672 | } |
e89a96f5 | 673 | |
77eeba97 LC |
674 | out: |
675 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 676 | |
77eeba97 LC |
677 | sdata->vif.bss_conf.idle = !conf; |
678 | ||
c0166da9 | 679 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
680 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
681 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
682 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
683 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 684 | } |
e89a96f5 | 685 | |
c0166da9 | 686 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
db82d8a9 | 687 | ieee80211_recalc_txpower(sdata, false); |
77eeba97 | 688 | ieee80211_recalc_chanctx_min_def(local, new_ctx); |
04ecd257 | 689 | } |
77eeba97 LC |
690 | |
691 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
692 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
693 | ieee80211_bss_info_change_notify(sdata, | |
694 | BSS_CHANGED_IDLE); | |
695 | ||
17c18bf8 JB |
696 | ieee80211_check_fast_xmit_iface(sdata); |
697 | ||
77eeba97 | 698 | return ret; |
d01a1e65 MK |
699 | } |
700 | ||
04ecd257 JB |
701 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
702 | struct ieee80211_chanctx *chanctx) | |
703 | { | |
704 | struct ieee80211_sub_if_data *sdata; | |
705 | u8 rx_chains_static, rx_chains_dynamic; | |
706 | ||
707 | lockdep_assert_held(&local->chanctx_mtx); | |
708 | ||
709 | rx_chains_static = 1; | |
710 | rx_chains_dynamic = 1; | |
711 | ||
712 | rcu_read_lock(); | |
713 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
714 | u8 needed_static, needed_dynamic; | |
715 | ||
716 | if (!ieee80211_sdata_running(sdata)) | |
717 | continue; | |
718 | ||
719 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
720 | &chanctx->conf) | |
721 | continue; | |
722 | ||
723 | switch (sdata->vif.type) { | |
724 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 725 | case NL80211_IFTYPE_NAN: |
04ecd257 JB |
726 | continue; |
727 | case NL80211_IFTYPE_STATION: | |
728 | if (!sdata->u.mgd.associated) | |
729 | continue; | |
730 | break; | |
731 | case NL80211_IFTYPE_AP_VLAN: | |
732 | continue; | |
733 | case NL80211_IFTYPE_AP: | |
734 | case NL80211_IFTYPE_ADHOC: | |
735 | case NL80211_IFTYPE_WDS: | |
736 | case NL80211_IFTYPE_MESH_POINT: | |
239281f8 | 737 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
738 | break; |
739 | default: | |
740 | WARN_ON_ONCE(1); | |
741 | } | |
742 | ||
743 | switch (sdata->smps_mode) { | |
744 | default: | |
745 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
746 | sdata->smps_mode); | |
747 | /* fall through */ | |
748 | case IEEE80211_SMPS_OFF: | |
749 | needed_static = sdata->needed_rx_chains; | |
750 | needed_dynamic = sdata->needed_rx_chains; | |
751 | break; | |
752 | case IEEE80211_SMPS_DYNAMIC: | |
753 | needed_static = 1; | |
754 | needed_dynamic = sdata->needed_rx_chains; | |
755 | break; | |
756 | case IEEE80211_SMPS_STATIC: | |
757 | needed_static = 1; | |
758 | needed_dynamic = 1; | |
759 | break; | |
760 | } | |
761 | ||
762 | rx_chains_static = max(rx_chains_static, needed_static); | |
763 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
764 | } | |
7b8a9cdd IY |
765 | |
766 | /* Disable SMPS for the monitor interface */ | |
767 | sdata = rcu_dereference(local->monitor_sdata); | |
768 | if (sdata && | |
769 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
770 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
771 | ||
04ecd257 JB |
772 | rcu_read_unlock(); |
773 | ||
774 | if (!local->use_chanctx) { | |
775 | if (rx_chains_static > 1) | |
776 | local->smps_mode = IEEE80211_SMPS_OFF; | |
777 | else if (rx_chains_dynamic > 1) | |
778 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
779 | else | |
780 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
781 | ieee80211_hw_config(local, 0); | |
782 | } | |
783 | ||
784 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
785 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
786 | return; | |
787 | ||
788 | chanctx->conf.rx_chains_static = rx_chains_static; | |
789 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
790 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
791 | } | |
792 | ||
11335a55 LC |
793 | static void |
794 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
795 | bool clear) | |
796 | { | |
33926eb7 | 797 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
798 | struct ieee80211_sub_if_data *vlan; |
799 | struct ieee80211_chanctx_conf *conf; | |
800 | ||
801 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
802 | return; | |
803 | ||
804 | lockdep_assert_held(&local->mtx); | |
805 | ||
806 | /* Check that conf exists, even when clearing this function | |
807 | * must be called with the AP's channel context still there | |
808 | * as it would otherwise cause VLANs to have an invalid | |
809 | * channel context pointer for a while, possibly pointing | |
810 | * to a channel context that has already been freed. | |
811 | */ | |
812 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 813 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
814 | WARN_ON(!conf); |
815 | ||
816 | if (clear) | |
817 | conf = NULL; | |
818 | ||
819 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
820 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
821 | } | |
822 | ||
823 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
824 | bool clear) | |
825 | { | |
826 | struct ieee80211_local *local = sdata->local; | |
827 | ||
828 | mutex_lock(&local->chanctx_mtx); | |
829 | ||
830 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
831 | ||
832 | mutex_unlock(&local->chanctx_mtx); | |
833 | } | |
834 | ||
835 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
836 | { | |
e3afb920 MK |
837 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
838 | ||
11335a55 LC |
839 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
840 | ||
e3afb920 | 841 | if (WARN_ON(!ctx)) |
73da7d5b SW |
842 | return -EINVAL; |
843 | ||
e3afb920 | 844 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
845 | sdata->reserved_chanctx = NULL; |
846 | ||
5bcae31d MK |
847 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
848 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
849 | if (WARN_ON(!ctx->replace_ctx)) | |
850 | return -EINVAL; | |
851 | ||
852 | WARN_ON(ctx->replace_ctx->replace_state != | |
853 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
854 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
855 | ||
856 | ctx->replace_ctx->replace_ctx = NULL; | |
857 | ctx->replace_ctx->replace_state = | |
858 | IEEE80211_CHANCTX_REPLACE_NONE; | |
859 | ||
860 | list_del_rcu(&ctx->list); | |
861 | kfree_rcu(ctx, rcu_head); | |
862 | } else { | |
863 | ieee80211_free_chanctx(sdata->local, ctx); | |
864 | } | |
865 | } | |
e3afb920 | 866 | |
11335a55 LC |
867 | return 0; |
868 | } | |
869 | ||
870 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
871 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
872 | enum ieee80211_chanctx_mode mode, |
873 | bool radar_required) | |
11335a55 LC |
874 | { |
875 | struct ieee80211_local *local = sdata->local; | |
5bcae31d | 876 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 877 | |
5bcae31d | 878 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 879 | |
5bcae31d MK |
880 | curr_ctx = ieee80211_vif_get_chanctx(sdata); |
881 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) | |
882 | return -ENOTSUPP; | |
11335a55 | 883 | |
13f348a8 | 884 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 885 | if (!new_ctx) { |
5bcae31d | 886 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 887 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
888 | if (IS_ERR(new_ctx)) |
889 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 890 | } else { |
5bcae31d MK |
891 | if (!curr_ctx || |
892 | (curr_ctx->replace_state == | |
893 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
894 | !list_empty(&curr_ctx->reserved_vifs)) { | |
895 | /* | |
896 | * Another vif already requested this context | |
897 | * for a reservation. Find another one hoping | |
898 | * all vifs assigned to it will also switch | |
899 | * soon enough. | |
900 | * | |
901 | * TODO: This needs a little more work as some | |
902 | * cases (more than 2 chanctx capable devices) | |
903 | * may fail which could otherwise succeed | |
904 | * provided some channel context juggling was | |
905 | * performed. | |
906 | * | |
907 | * Consider ctx1..3, vif1..6, each ctx has 2 | |
908 | * vifs. vif1 and vif2 from ctx1 request new | |
909 | * different chandefs starting 2 in-place | |
910 | * reserations with ctx4 and ctx5 replacing | |
911 | * ctx1 and ctx2 respectively. Next vif5 and | |
912 | * vif6 from ctx3 reserve ctx4. If vif3 and | |
913 | * vif4 remain on ctx2 as they are then this | |
914 | * fails unless `replace_ctx` from ctx5 is | |
915 | * replaced with ctx3. | |
916 | */ | |
917 | list_for_each_entry(ctx, &local->chanctx_list, | |
918 | list) { | |
919 | if (ctx->replace_state != | |
920 | IEEE80211_CHANCTX_REPLACE_NONE) | |
921 | continue; | |
922 | ||
923 | if (!list_empty(&ctx->reserved_vifs)) | |
924 | continue; | |
925 | ||
926 | curr_ctx = ctx; | |
927 | break; | |
928 | } | |
929 | } | |
930 | ||
931 | /* | |
932 | * If that's true then all available contexts already | |
933 | * have reservations and cannot be used. | |
934 | */ | |
935 | if (!curr_ctx || | |
936 | (curr_ctx->replace_state == | |
937 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
938 | !list_empty(&curr_ctx->reserved_vifs)) | |
939 | return -EBUSY; | |
940 | ||
941 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
942 | if (!new_ctx) | |
943 | return -ENOMEM; | |
944 | ||
945 | new_ctx->replace_ctx = curr_ctx; | |
946 | new_ctx->replace_state = | |
947 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
948 | ||
949 | curr_ctx->replace_ctx = new_ctx; | |
950 | curr_ctx->replace_state = | |
951 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
952 | ||
953 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
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; |
5bcae31d MK |
961 | sdata->reserved_ready = false; |
962 | ||
963 | return 0; | |
11335a55 LC |
964 | } |
965 | ||
03078de4 MK |
966 | static void |
967 | ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) | |
968 | { | |
969 | switch (sdata->vif.type) { | |
970 | case NL80211_IFTYPE_ADHOC: | |
971 | case NL80211_IFTYPE_AP: | |
972 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 973 | case NL80211_IFTYPE_OCB: |
03078de4 MK |
974 | ieee80211_queue_work(&sdata->local->hw, |
975 | &sdata->csa_finalize_work); | |
976 | break; | |
03078de4 | 977 | case NL80211_IFTYPE_STATION: |
4c3ebc56 MK |
978 | ieee80211_queue_work(&sdata->local->hw, |
979 | &sdata->u.mgd.chswitch_work); | |
980 | break; | |
981 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
982 | case NL80211_IFTYPE_AP_VLAN: |
983 | case NL80211_IFTYPE_WDS: | |
984 | case NL80211_IFTYPE_MONITOR: | |
985 | case NL80211_IFTYPE_P2P_CLIENT: | |
986 | case NL80211_IFTYPE_P2P_GO: | |
987 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 988 | case NL80211_IFTYPE_NAN: |
03078de4 MK |
989 | case NUM_NL80211_IFTYPES: |
990 | WARN_ON(1); | |
991 | break; | |
992 | } | |
993 | } | |
994 | ||
2967e031 FF |
995 | static void |
996 | ieee80211_vif_update_chandef(struct ieee80211_sub_if_data *sdata, | |
997 | const struct cfg80211_chan_def *chandef) | |
998 | { | |
999 | struct ieee80211_sub_if_data *vlan; | |
1000 | ||
1001 | sdata->vif.bss_conf.chandef = *chandef; | |
1002 | ||
1003 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1004 | return; | |
1005 | ||
1006 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
1007 | vlan->vif.bss_conf.chandef = *chandef; | |
1008 | } | |
1009 | ||
5bcae31d MK |
1010 | static int |
1011 | ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata) | |
11335a55 LC |
1012 | { |
1013 | struct ieee80211_local *local = sdata->local; | |
5bcae31d MK |
1014 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
1015 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1016 | const struct cfg80211_chan_def *chandef; | |
1017 | u32 changed = 0; | |
1018 | int err; | |
11335a55 LC |
1019 | |
1020 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 1021 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 1022 | |
5bcae31d MK |
1023 | new_ctx = sdata->reserved_chanctx; |
1024 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
11335a55 | 1025 | |
5bcae31d MK |
1026 | if (WARN_ON(!sdata->reserved_ready)) |
1027 | return -EBUSY; | |
73da7d5b | 1028 | |
5bcae31d MK |
1029 | if (WARN_ON(!new_ctx)) |
1030 | return -EINVAL; | |
1031 | ||
1032 | if (WARN_ON(!old_ctx)) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | if (WARN_ON(new_ctx->replace_state == | |
1036 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1037 | return -EINVAL; | |
1038 | ||
1039 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1040 | &sdata->reserved_chandef); | |
1041 | if (WARN_ON(!chandef)) | |
1042 | return -EINVAL; | |
1043 | ||
bf45a242 AO |
1044 | ieee80211_change_chanctx(local, new_ctx, chandef); |
1045 | ||
5bcae31d MK |
1046 | vif_chsw[0].vif = &sdata->vif; |
1047 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1048 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
1049 | ||
1050 | list_del(&sdata->reserved_chanctx_list); | |
1051 | sdata->reserved_chanctx = NULL; | |
1052 | ||
1053 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1054 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1055 | if (err) { | |
1056 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1057 | ieee80211_free_chanctx(local, new_ctx); | |
1058 | ||
03078de4 | 1059 | goto out; |
73da7d5b SW |
1060 | } |
1061 | ||
5bcae31d MK |
1062 | list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs); |
1063 | rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf); | |
1064 | ||
1065 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1066 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1067 | ||
17c18bf8 JB |
1068 | ieee80211_check_fast_xmit_iface(sdata); |
1069 | ||
5bcae31d MK |
1070 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) |
1071 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1072 | |
11335a55 | 1073 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
5bcae31d | 1074 | changed = BSS_CHANGED_BANDWIDTH; |
11335a55 | 1075 | |
2967e031 | 1076 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
11335a55 | 1077 | |
722ddb0d EG |
1078 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1079 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
1080 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
1081 | ||
5bcae31d MK |
1082 | if (changed) |
1083 | ieee80211_bss_info_change_notify(sdata, changed); | |
1084 | ||
03078de4 MK |
1085 | out: |
1086 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1087 | return err; |
1088 | } | |
1089 | ||
1090 | static int | |
1091 | ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata) | |
1092 | { | |
1093 | struct ieee80211_local *local = sdata->local; | |
1094 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1095 | const struct cfg80211_chan_def *chandef; | |
1096 | int err; | |
1097 | ||
1098 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1099 | new_ctx = sdata->reserved_chanctx; | |
1100 | ||
1101 | if (WARN_ON(!sdata->reserved_ready)) | |
1102 | return -EINVAL; | |
1103 | ||
1104 | if (WARN_ON(old_ctx)) | |
1105 | return -EINVAL; | |
1106 | ||
1107 | if (WARN_ON(!new_ctx)) | |
1108 | return -EINVAL; | |
1109 | ||
1110 | if (WARN_ON(new_ctx->replace_state == | |
1111 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1112 | return -EINVAL; | |
1113 | ||
1114 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1115 | &sdata->reserved_chandef); | |
1116 | if (WARN_ON(!chandef)) | |
1117 | return -EINVAL; | |
1118 | ||
bf45a242 AO |
1119 | ieee80211_change_chanctx(local, new_ctx, chandef); |
1120 | ||
e3afb920 | 1121 | list_del(&sdata->reserved_chanctx_list); |
5bcae31d | 1122 | sdata->reserved_chanctx = NULL; |
11335a55 | 1123 | |
5bcae31d MK |
1124 | err = ieee80211_assign_vif_chanctx(sdata, new_ctx); |
1125 | if (err) { | |
1126 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1127 | ieee80211_free_chanctx(local, new_ctx); | |
1128 | ||
1129 | goto out; | |
1130 | } | |
1131 | ||
1132 | out: | |
03078de4 | 1133 | ieee80211_vif_chanctx_reservation_complete(sdata); |
5bcae31d MK |
1134 | return err; |
1135 | } | |
1136 | ||
1137 | static bool | |
1138 | ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata) | |
1139 | { | |
1140 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1141 | ||
1142 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1143 | ||
1144 | new_ctx = sdata->reserved_chanctx; | |
1145 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1146 | ||
1147 | if (!old_ctx) | |
1148 | return false; | |
1149 | ||
1150 | if (WARN_ON(!new_ctx)) | |
1151 | return false; | |
1152 | ||
1153 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1154 | return false; | |
1155 | ||
1156 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1157 | return false; | |
1158 | ||
1159 | return true; | |
1160 | } | |
1161 | ||
1162 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1163 | struct ieee80211_chanctx *new_ctx) | |
1164 | { | |
1165 | const struct cfg80211_chan_def *chandef; | |
1166 | ||
1167 | lockdep_assert_held(&local->mtx); | |
1168 | lockdep_assert_held(&local->chanctx_mtx); | |
1169 | ||
1170 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1171 | if (WARN_ON(!chandef)) | |
1172 | return -EINVAL; | |
1173 | ||
1174 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1175 | local->_oper_chandef = *chandef; | |
1176 | ieee80211_hw_config(local, 0); | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | ||
1181 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1182 | int n_vifs) | |
1183 | { | |
1184 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
1185 | struct ieee80211_sub_if_data *sdata; | |
1186 | struct ieee80211_chanctx *ctx, *old_ctx; | |
1187 | int i, err; | |
1188 | ||
1189 | lockdep_assert_held(&local->mtx); | |
1190 | lockdep_assert_held(&local->chanctx_mtx); | |
1191 | ||
1192 | vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL); | |
1193 | if (!vif_chsw) | |
1194 | return -ENOMEM; | |
1195 | ||
1196 | i = 0; | |
1197 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1198 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1199 | continue; | |
1200 | ||
1201 | if (WARN_ON(!ctx->replace_ctx)) { | |
1202 | err = -EINVAL; | |
5d52ee81 LC |
1203 | goto out; |
1204 | } | |
11335a55 | 1205 | |
5bcae31d MK |
1206 | list_for_each_entry(sdata, &ctx->reserved_vifs, |
1207 | reserved_chanctx_list) { | |
1208 | if (!ieee80211_vif_has_in_place_reservation( | |
1209 | sdata)) | |
1210 | continue; | |
1211 | ||
1212 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1213 | vif_chsw[i].vif = &sdata->vif; | |
1214 | vif_chsw[i].old_ctx = &old_ctx->conf; | |
1215 | vif_chsw[i].new_ctx = &ctx->conf; | |
1216 | ||
1217 | i++; | |
1218 | } | |
5d52ee81 | 1219 | } |
11335a55 | 1220 | |
5bcae31d MK |
1221 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1222 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1223 | |
11335a55 | 1224 | out: |
5bcae31d MK |
1225 | kfree(vif_chsw); |
1226 | return err; | |
1227 | } | |
1228 | ||
1229 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1230 | { | |
1231 | struct ieee80211_chanctx *ctx; | |
1232 | int err; | |
1233 | ||
1234 | lockdep_assert_held(&local->mtx); | |
1235 | lockdep_assert_held(&local->chanctx_mtx); | |
1236 | ||
1237 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1238 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1239 | continue; | |
1240 | ||
1241 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1242 | continue; | |
1243 | ||
1244 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1245 | err = ieee80211_add_chanctx(local, ctx); | |
1246 | if (err) | |
1247 | goto err; | |
1248 | } | |
1249 | ||
1250 | return 0; | |
1251 | ||
1252 | err: | |
1253 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1254 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1255 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1256 | continue; | |
1257 | ||
1258 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1259 | continue; | |
1260 | ||
1261 | ieee80211_del_chanctx(local, ctx); | |
1262 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1263 | } | |
1264 | ||
1265 | return err; | |
1266 | } | |
1267 | ||
649b2a4d | 1268 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d MK |
1269 | { |
1270 | struct ieee80211_sub_if_data *sdata, *sdata_tmp; | |
1271 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; | |
1272 | struct ieee80211_chanctx *new_ctx = NULL; | |
1273 | int i, err, n_assigned, n_reserved, n_ready; | |
1274 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; | |
1275 | ||
1276 | lockdep_assert_held(&local->mtx); | |
1277 | lockdep_assert_held(&local->chanctx_mtx); | |
1278 | ||
1279 | /* | |
1280 | * If there are 2 independent pairs of channel contexts performing | |
1281 | * cross-switch of their vifs this code will still wait until both are | |
1282 | * ready even though it could be possible to switch one before the | |
1283 | * other is ready. | |
1284 | * | |
1285 | * For practical reasons and code simplicity just do a single huge | |
1286 | * switch. | |
1287 | */ | |
1288 | ||
1289 | /* | |
1290 | * Verify if the reservation is still feasible. | |
1291 | * - if it's not then disconnect | |
1292 | * - if it is but not all vifs necessary are ready then defer | |
1293 | */ | |
1294 | ||
1295 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1296 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1297 | continue; | |
1298 | ||
1299 | if (WARN_ON(!ctx->replace_ctx)) { | |
1300 | err = -EINVAL; | |
1301 | goto err; | |
1302 | } | |
1303 | ||
1304 | if (!local->use_chanctx) | |
1305 | new_ctx = ctx; | |
1306 | ||
1307 | n_ctx++; | |
1308 | ||
1309 | n_assigned = 0; | |
1310 | n_reserved = 0; | |
1311 | n_ready = 0; | |
1312 | ||
1313 | list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs, | |
1314 | assigned_chanctx_list) { | |
1315 | n_assigned++; | |
1316 | if (sdata->reserved_chanctx) { | |
1317 | n_reserved++; | |
1318 | if (sdata->reserved_ready) | |
1319 | n_ready++; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | if (n_assigned != n_reserved) { | |
1324 | if (n_ready == n_reserved) { | |
1325 | wiphy_info(local->hw.wiphy, | |
1326 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1327 | err = -EBUSY; | |
1328 | goto err; | |
1329 | } | |
1330 | ||
1331 | return -EAGAIN; | |
1332 | } | |
1333 | ||
1334 | ctx->conf.radar_enabled = false; | |
1335 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1336 | reserved_chanctx_list) { | |
1337 | if (ieee80211_vif_has_in_place_reservation(sdata) && | |
1338 | !sdata->reserved_ready) | |
1339 | return -EAGAIN; | |
1340 | ||
1341 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1342 | if (old_ctx) { | |
1343 | if (old_ctx->replace_state == | |
1344 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1345 | n_vifs_switch++; | |
1346 | else | |
1347 | n_vifs_assign++; | |
1348 | } else { | |
1349 | n_vifs_ctxless++; | |
1350 | } | |
1351 | ||
1352 | if (sdata->reserved_radar_required) | |
1353 | ctx->conf.radar_enabled = true; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | if (WARN_ON(n_ctx == 0) || | |
1358 | WARN_ON(n_vifs_switch == 0 && | |
1359 | n_vifs_assign == 0 && | |
1360 | n_vifs_ctxless == 0) || | |
1361 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1362 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1363 | err = -EINVAL; | |
1364 | goto err; | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * All necessary vifs are ready. Perform the switch now depending on | |
1369 | * reservations and driver capabilities. | |
1370 | */ | |
1371 | ||
1372 | if (local->use_chanctx) { | |
1373 | if (n_vifs_switch > 0) { | |
1374 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1375 | if (err) | |
1376 | goto err; | |
1377 | } | |
1378 | ||
1379 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1380 | err = ieee80211_chsw_switch_ctxs(local); | |
1381 | if (err) | |
1382 | goto err; | |
1383 | } | |
1384 | } else { | |
1385 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1386 | if (err) | |
1387 | goto err; | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * Update all structures, values and pointers to point to new channel | |
1392 | * context(s). | |
1393 | */ | |
1394 | ||
1395 | i = 0; | |
1396 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1397 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1398 | continue; | |
1399 | ||
1400 | if (WARN_ON(!ctx->replace_ctx)) { | |
1401 | err = -EINVAL; | |
1402 | goto err; | |
1403 | } | |
1404 | ||
1405 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1406 | reserved_chanctx_list) { | |
1407 | u32 changed = 0; | |
1408 | ||
1409 | if (!ieee80211_vif_has_in_place_reservation(sdata)) | |
1410 | continue; | |
1411 | ||
1412 | rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); | |
1413 | ||
1414 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1415 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, | |
1416 | false); | |
1417 | ||
17c18bf8 JB |
1418 | ieee80211_check_fast_xmit_iface(sdata); |
1419 | ||
5bcae31d MK |
1420 | sdata->radar_required = sdata->reserved_radar_required; |
1421 | ||
1422 | if (sdata->vif.bss_conf.chandef.width != | |
1423 | sdata->reserved_chandef.width) | |
1424 | changed = BSS_CHANGED_BANDWIDTH; | |
1425 | ||
2967e031 | 1426 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
5bcae31d MK |
1427 | if (changed) |
1428 | ieee80211_bss_info_change_notify(sdata, | |
1429 | changed); | |
1430 | ||
db82d8a9 | 1431 | ieee80211_recalc_txpower(sdata, false); |
5bcae31d MK |
1432 | } |
1433 | ||
1434 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1435 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1436 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1437 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1438 | ||
1439 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1440 | reserved_chanctx_list) { | |
1441 | if (ieee80211_vif_get_chanctx(sdata) != ctx) | |
1442 | continue; | |
1443 | ||
1444 | list_del(&sdata->reserved_chanctx_list); | |
1445 | list_move(&sdata->assigned_chanctx_list, | |
47e4df94 | 1446 | &ctx->assigned_vifs); |
5bcae31d | 1447 | sdata->reserved_chanctx = NULL; |
03078de4 MK |
1448 | |
1449 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1450 | } |
1451 | ||
1452 | /* | |
1453 | * This context might have been a dependency for an already | |
1454 | * ready re-assign reservation interface that was deferred. Do | |
1455 | * not propagate error to the caller though. The in-place | |
1456 | * reservation for originally requested interface has already | |
1457 | * succeeded at this point. | |
1458 | */ | |
1459 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1460 | reserved_chanctx_list) { | |
1461 | if (WARN_ON(ieee80211_vif_has_in_place_reservation( | |
1462 | sdata))) | |
1463 | continue; | |
1464 | ||
1465 | if (WARN_ON(sdata->reserved_chanctx != ctx)) | |
1466 | continue; | |
1467 | ||
1468 | if (!sdata->reserved_ready) | |
1469 | continue; | |
1470 | ||
1471 | if (ieee80211_vif_get_chanctx(sdata)) | |
1472 | err = ieee80211_vif_use_reserved_reassign( | |
1473 | sdata); | |
1474 | else | |
1475 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1476 | ||
1477 | if (err) { | |
1478 | sdata_info(sdata, | |
1479 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1480 | err); | |
1481 | ieee80211_vif_unreserve_chanctx(sdata); | |
1482 | cfg80211_stop_iface(local->hw.wiphy, | |
1483 | &sdata->wdev, | |
1484 | GFP_KERNEL); | |
1485 | } | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | /* | |
1490 | * Finally free old contexts | |
1491 | */ | |
1492 | ||
1493 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1494 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1495 | continue; | |
1496 | ||
1497 | ctx->replace_ctx->replace_ctx = NULL; | |
1498 | ctx->replace_ctx->replace_state = | |
1499 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1500 | ||
1501 | list_del_rcu(&ctx->list); | |
1502 | kfree_rcu(ctx, rcu_head); | |
1503 | } | |
1504 | ||
1505 | return 0; | |
1506 | ||
1507 | err: | |
1508 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1509 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1510 | continue; | |
1511 | ||
1512 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
03078de4 | 1513 | reserved_chanctx_list) { |
5bcae31d | 1514 | ieee80211_vif_unreserve_chanctx(sdata); |
03078de4 MK |
1515 | ieee80211_vif_chanctx_reservation_complete(sdata); |
1516 | } | |
5bcae31d MK |
1517 | } |
1518 | ||
1519 | return err; | |
1520 | } | |
1521 | ||
649b2a4d JB |
1522 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1523 | { | |
1524 | struct ieee80211_local *local = sdata->local; | |
1525 | struct ieee80211_chanctx_conf *conf; | |
1526 | struct ieee80211_chanctx *ctx; | |
1527 | bool use_reserved_switch = false; | |
1528 | ||
1529 | lockdep_assert_held(&local->chanctx_mtx); | |
1530 | ||
1531 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1532 | lockdep_is_held(&local->chanctx_mtx)); | |
1533 | if (!conf) | |
1534 | return; | |
1535 | ||
1536 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1537 | ||
1538 | if (sdata->reserved_chanctx) { | |
1539 | if (sdata->reserved_chanctx->replace_state == | |
1540 | IEEE80211_CHANCTX_REPLACES_OTHER && | |
1541 | ieee80211_chanctx_num_reserved(local, | |
1542 | sdata->reserved_chanctx) > 1) | |
1543 | use_reserved_switch = true; | |
1544 | ||
1545 | ieee80211_vif_unreserve_chanctx(sdata); | |
1546 | } | |
1547 | ||
1548 | ieee80211_assign_vif_chanctx(sdata, NULL); | |
1549 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1550 | ieee80211_free_chanctx(local, ctx); | |
1551 | ||
104f5a62 EP |
1552 | sdata->radar_required = false; |
1553 | ||
649b2a4d JB |
1554 | /* Unreserving may ready an in-place reservation. */ |
1555 | if (use_reserved_switch) | |
1556 | ieee80211_vif_use_reserved_switch(local); | |
1557 | } | |
1558 | ||
1559 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, | |
1560 | const struct cfg80211_chan_def *chandef, | |
1561 | enum ieee80211_chanctx_mode mode) | |
1562 | { | |
1563 | struct ieee80211_local *local = sdata->local; | |
1564 | struct ieee80211_chanctx *ctx; | |
1565 | u8 radar_detect_width = 0; | |
1566 | int ret; | |
1567 | ||
1568 | lockdep_assert_held(&local->mtx); | |
1569 | ||
1570 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); | |
1571 | ||
1572 | mutex_lock(&local->chanctx_mtx); | |
1573 | ||
1574 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1575 | chandef, | |
1576 | sdata->wdev.iftype); | |
1577 | if (ret < 0) | |
1578 | goto out; | |
1579 | if (ret > 0) | |
1580 | radar_detect_width = BIT(chandef->width); | |
1581 | ||
1582 | sdata->radar_required = ret; | |
1583 | ||
1584 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1585 | radar_detect_width); | |
1586 | if (ret < 0) | |
1587 | goto out; | |
1588 | ||
1589 | __ieee80211_vif_release_channel(sdata); | |
1590 | ||
1591 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1592 | if (!ctx) | |
1593 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1594 | if (IS_ERR(ctx)) { | |
1595 | ret = PTR_ERR(ctx); | |
1596 | goto out; | |
1597 | } | |
1598 | ||
2967e031 | 1599 | ieee80211_vif_update_chandef(sdata, chandef); |
649b2a4d JB |
1600 | |
1601 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); | |
1602 | if (ret) { | |
1603 | /* if assign fails refcount stays the same */ | |
1604 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1605 | ieee80211_free_chanctx(local, ctx); | |
1606 | goto out; | |
1607 | } | |
1608 | ||
1609 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1610 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1611 | out: | |
104f5a62 EP |
1612 | if (ret) |
1613 | sdata->radar_required = false; | |
1614 | ||
649b2a4d JB |
1615 | mutex_unlock(&local->chanctx_mtx); |
1616 | return ret; | |
1617 | } | |
1618 | ||
5bcae31d MK |
1619 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata) |
1620 | { | |
1621 | struct ieee80211_local *local = sdata->local; | |
1622 | struct ieee80211_chanctx *new_ctx; | |
1623 | struct ieee80211_chanctx *old_ctx; | |
1624 | int err; | |
1625 | ||
1626 | lockdep_assert_held(&local->mtx); | |
1627 | lockdep_assert_held(&local->chanctx_mtx); | |
1628 | ||
1629 | new_ctx = sdata->reserved_chanctx; | |
1630 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1631 | ||
1632 | if (WARN_ON(!new_ctx)) | |
1633 | return -EINVAL; | |
1634 | ||
1635 | if (WARN_ON(new_ctx->replace_state == | |
1636 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1637 | return -EINVAL; | |
1638 | ||
1639 | if (WARN_ON(sdata->reserved_ready)) | |
1640 | return -EINVAL; | |
1641 | ||
1642 | sdata->reserved_ready = true; | |
1643 | ||
1644 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1645 | if (old_ctx) | |
1646 | err = ieee80211_vif_use_reserved_reassign(sdata); | |
1647 | else | |
1648 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1649 | ||
1650 | if (err) | |
1651 | return err; | |
1652 | } | |
1653 | ||
1654 | /* | |
1655 | * In-place reservation may need to be finalized now either if: | |
1656 | * a) sdata is taking part in the swapping itself and is the last one | |
1657 | * b) sdata has switched with a re-assign reservation to an existing | |
1658 | * context readying in-place switching of old_ctx | |
1659 | * | |
1660 | * In case of (b) do not propagate the error up because the requested | |
1661 | * sdata already switched successfully. Just spill an extra warning. | |
1662 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1663 | * interfaces upon failure. | |
1664 | */ | |
1665 | if ((old_ctx && | |
1666 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1667 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1668 | err = ieee80211_vif_use_reserved_switch(local); | |
1669 | if (err && err != -EAGAIN) { | |
1670 | if (new_ctx->replace_state == | |
1671 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1672 | return err; | |
1673 | ||
1674 | wiphy_info(local->hw.wiphy, | |
1675 | "depending in-place reservation failed (err=%d)\n", | |
1676 | err); | |
1677 | } | |
1678 | } | |
1679 | ||
1680 | return 0; | |
73da7d5b SW |
1681 | } |
1682 | ||
2c9b7359 JB |
1683 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1684 | const struct cfg80211_chan_def *chandef, | |
1685 | u32 *changed) | |
1686 | { | |
1687 | struct ieee80211_local *local = sdata->local; | |
1688 | struct ieee80211_chanctx_conf *conf; | |
1689 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1690 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1691 | int ret; |
1692 | ||
1693 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1694 | IEEE80211_CHAN_DISABLED)) | |
1695 | return -EINVAL; | |
1696 | ||
1697 | mutex_lock(&local->chanctx_mtx); | |
1698 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1699 | ret = 0; | |
1700 | goto out; | |
1701 | } | |
1702 | ||
1703 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1704 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1705 | ret = -EINVAL; | |
1706 | goto out; | |
1707 | } | |
1708 | ||
1709 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1710 | lockdep_is_held(&local->chanctx_mtx)); | |
1711 | if (!conf) { | |
1712 | ret = -EINVAL; | |
1713 | goto out; | |
1714 | } | |
1715 | ||
1716 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1717 | |
1718 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1719 | if (!compat) { | |
2c9b7359 JB |
1720 | ret = -EINVAL; |
1721 | goto out; | |
1722 | } | |
1723 | ||
5bcae31d MK |
1724 | switch (ctx->replace_state) { |
1725 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1726 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1727 | ret = -EBUSY; | |
1728 | goto out; | |
1729 | } | |
1730 | break; | |
1731 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1732 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1733 | * reservation itself? */ |
1734 | ret = -EBUSY; | |
1735 | goto out; | |
1736 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1737 | /* channel context that is going to replace another channel | |
1738 | * context doesn't really exist and shouldn't be assigned | |
1739 | * anywhere yet */ | |
1740 | WARN_ON(1); | |
1741 | break; | |
1742 | } | |
1743 | ||
2967e031 | 1744 | ieee80211_vif_update_chandef(sdata, chandef); |
2c9b7359 JB |
1745 | |
1746 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1747 | ||
1748 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1749 | ret = 0; | |
1750 | out: | |
1751 | mutex_unlock(&local->chanctx_mtx); | |
1752 | return ret; | |
1753 | } | |
1754 | ||
d01a1e65 MK |
1755 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1756 | { | |
55de908a JB |
1757 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1758 | ||
34a3740d JB |
1759 | lockdep_assert_held(&sdata->local->mtx); |
1760 | ||
d01a1e65 MK |
1761 | mutex_lock(&sdata->local->chanctx_mtx); |
1762 | __ieee80211_vif_release_channel(sdata); | |
1763 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1764 | } | |
3448c005 | 1765 | |
4d76d21b JB |
1766 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1767 | { | |
1768 | struct ieee80211_local *local = sdata->local; | |
1769 | struct ieee80211_sub_if_data *ap; | |
1770 | struct ieee80211_chanctx_conf *conf; | |
1771 | ||
1772 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1773 | return; | |
1774 | ||
1775 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1776 | ||
1777 | mutex_lock(&local->chanctx_mtx); | |
1778 | ||
1779 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1780 | lockdep_is_held(&local->chanctx_mtx)); | |
1781 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1782 | mutex_unlock(&local->chanctx_mtx); | |
1783 | } | |
1784 | ||
3448c005 JB |
1785 | void ieee80211_iter_chan_contexts_atomic( |
1786 | struct ieee80211_hw *hw, | |
1787 | void (*iter)(struct ieee80211_hw *hw, | |
1788 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1789 | void *data), | |
1790 | void *iter_data) | |
1791 | { | |
1792 | struct ieee80211_local *local = hw_to_local(hw); | |
1793 | struct ieee80211_chanctx *ctx; | |
1794 | ||
1795 | rcu_read_lock(); | |
1796 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1797 | if (ctx->driver_present) |
1798 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1799 | rcu_read_unlock(); |
1800 | } | |
1801 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |