1
2
3
4
5#include <linux/nl80211.h>
6#include <linux/export.h>
7#include <linux/rtnetlink.h>
8#include <net/cfg80211.h>
9#include "ieee80211_i.h"
10#include "driver-ops.h"
11
12static 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
26static 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
40int 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
47static 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
60static 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
66static struct ieee80211_chanctx *
67ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata)
68{
69 struct ieee80211_local *local __maybe_unused = sdata->local;
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
80static const struct cfg80211_chan_def *
81ieee80211_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
103static const struct cfg80211_chan_def *
104ieee80211_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
129static const struct cfg80211_chan_def *
130ieee80211_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
147static bool
148ieee80211_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
164static struct ieee80211_chanctx *
165ieee80211_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) {
177 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
178 continue;
179
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
193enum 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
208
209
210
211
212
213
214
215 return NL80211_CHAN_WIDTH_160;
216 default:
217 WARN_ON(1);
218 return NL80211_CHAN_WIDTH_20;
219 }
220}
221
222static enum nl80211_chan_width
223ieee80211_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 || !test_sta_flag(sta, WLAN_STA_ASSOC))
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
244static enum nl80211_chan_width
245ieee80211_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_STATION:
268
269
270
271
272
273 width = max(vif->bss_conf.chandef.width,
274 ieee80211_get_max_required_bw(sdata));
275 break;
276 case NL80211_IFTYPE_P2P_DEVICE:
277 continue;
278 case NL80211_IFTYPE_ADHOC:
279 case NL80211_IFTYPE_WDS:
280 case NL80211_IFTYPE_MESH_POINT:
281 case NL80211_IFTYPE_OCB:
282 width = vif->bss_conf.chandef.width;
283 break;
284 case NL80211_IFTYPE_UNSPECIFIED:
285 case NUM_NL80211_IFTYPES:
286 case NL80211_IFTYPE_MONITOR:
287 case NL80211_IFTYPE_P2P_CLIENT:
288 case NL80211_IFTYPE_P2P_GO:
289 WARN_ON_ONCE(1);
290 }
291 max_bw = max(max_bw, width);
292 }
293
294
295 sdata = rcu_dereference(local->monitor_sdata);
296 if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf)
297 max_bw = max(max_bw, conf->def.width);
298
299 rcu_read_unlock();
300
301 return max_bw;
302}
303
304
305
306
307
308
309void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
310 struct ieee80211_chanctx *ctx)
311{
312 enum nl80211_chan_width max_bw;
313 struct cfg80211_chan_def min_def;
314
315 lockdep_assert_held(&local->chanctx_mtx);
316
317
318 if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 ||
319 ctx->conf.def.width == NL80211_CHAN_WIDTH_10 ||
320 ctx->conf.radar_enabled) {
321 ctx->conf.min_def = ctx->conf.def;
322 return;
323 }
324
325 max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf);
326
327
328 min_def = ctx->conf.def;
329 while (min_def.width > max_bw)
330 ieee80211_chandef_downgrade(&min_def);
331
332 if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def))
333 return;
334
335 ctx->conf.min_def = min_def;
336 if (!ctx->driver_present)
337 return;
338
339 drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH);
340}
341
342static void ieee80211_change_chanctx(struct ieee80211_local *local,
343 struct ieee80211_chanctx *ctx,
344 const struct cfg80211_chan_def *chandef)
345{
346 if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) {
347 ieee80211_recalc_chanctx_min_def(local, ctx);
348 return;
349 }
350
351 WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));
352
353 ctx->conf.def = *chandef;
354 drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH);
355 ieee80211_recalc_chanctx_min_def(local, ctx);
356
357 if (!local->use_chanctx) {
358 local->_oper_chandef = *chandef;
359 ieee80211_hw_config(local, 0);
360 }
361}
362
363static struct ieee80211_chanctx *
364ieee80211_find_chanctx(struct ieee80211_local *local,
365 const struct cfg80211_chan_def *chandef,
366 enum ieee80211_chanctx_mode mode)
367{
368 struct ieee80211_chanctx *ctx;
369
370 lockdep_assert_held(&local->chanctx_mtx);
371
372 if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
373 return NULL;
374
375 list_for_each_entry(ctx, &local->chanctx_list, list) {
376 const struct cfg80211_chan_def *compat;
377
378 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE)
379 continue;
380
381 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
382 continue;
383
384 compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef);
385 if (!compat)
386 continue;
387
388 compat = ieee80211_chanctx_reserved_chandef(local, ctx,
389 compat);
390 if (!compat)
391 continue;
392
393 ieee80211_change_chanctx(local, ctx, compat);
394
395 return ctx;
396 }
397
398 return NULL;
399}
400
401bool ieee80211_is_radar_required(struct ieee80211_local *local)
402{
403 struct ieee80211_sub_if_data *sdata;
404
405 lockdep_assert_held(&local->mtx);
406
407 rcu_read_lock();
408 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
409 if (sdata->radar_required) {
410 rcu_read_unlock();
411 return true;
412 }
413 }
414 rcu_read_unlock();
415
416 return false;
417}
418
419static bool
420ieee80211_chanctx_radar_required(struct ieee80211_local *local,
421 struct ieee80211_chanctx *ctx)
422{
423 struct ieee80211_chanctx_conf *conf = &ctx->conf;
424 struct ieee80211_sub_if_data *sdata;
425 bool required = false;
426
427 lockdep_assert_held(&local->chanctx_mtx);
428 lockdep_assert_held(&local->mtx);
429
430 rcu_read_lock();
431 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
432 if (!ieee80211_sdata_running(sdata))
433 continue;
434 if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
435 continue;
436 if (!sdata->radar_required)
437 continue;
438
439 required = true;
440 break;
441 }
442 rcu_read_unlock();
443
444 return required;
445}
446
447static struct ieee80211_chanctx *
448ieee80211_alloc_chanctx(struct ieee80211_local *local,
449 const struct cfg80211_chan_def *chandef,
450 enum ieee80211_chanctx_mode mode)
451{
452 struct ieee80211_chanctx *ctx;
453
454 lockdep_assert_held(&local->chanctx_mtx);
455
456 ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL);
457 if (!ctx)
458 return NULL;
459
460 INIT_LIST_HEAD(&ctx->assigned_vifs);
461 INIT_LIST_HEAD(&ctx->reserved_vifs);
462 ctx->conf.def = *chandef;
463 ctx->conf.rx_chains_static = 1;
464 ctx->conf.rx_chains_dynamic = 1;
465 ctx->mode = mode;
466 ctx->conf.radar_enabled = false;
467 ieee80211_recalc_chanctx_min_def(local, ctx);
468
469 return ctx;
470}
471
472static int ieee80211_add_chanctx(struct ieee80211_local *local,
473 struct ieee80211_chanctx *ctx)
474{
475 u32 changed;
476 int err;
477
478 lockdep_assert_held(&local->mtx);
479 lockdep_assert_held(&local->chanctx_mtx);
480
481 if (!local->use_chanctx)
482 local->hw.conf.radar_enabled = ctx->conf.radar_enabled;
483
484
485 changed = ieee80211_idle_off(local);
486 if (changed)
487 ieee80211_hw_config(local, changed);
488
489 if (!local->use_chanctx) {
490 local->_oper_chandef = ctx->conf.def;
491 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
492 } else {
493 err = drv_add_chanctx(local, ctx);
494 if (err) {
495 ieee80211_recalc_idle(local);
496 return err;
497 }
498 }
499
500 return 0;
501}
502
503static struct ieee80211_chanctx *
504ieee80211_new_chanctx(struct ieee80211_local *local,
505 const struct cfg80211_chan_def *chandef,
506 enum ieee80211_chanctx_mode mode)
507{
508 struct ieee80211_chanctx *ctx;
509 int err;
510
511 lockdep_assert_held(&local->mtx);
512 lockdep_assert_held(&local->chanctx_mtx);
513
514 ctx = ieee80211_alloc_chanctx(local, chandef, mode);
515 if (!ctx)
516 return ERR_PTR(-ENOMEM);
517
518 err = ieee80211_add_chanctx(local, ctx);
519 if (err) {
520 kfree(ctx);
521 return ERR_PTR(err);
522 }
523
524 list_add_rcu(&ctx->list, &local->chanctx_list);
525 return ctx;
526}
527
528static void ieee80211_del_chanctx(struct ieee80211_local *local,
529 struct ieee80211_chanctx *ctx)
530{
531 lockdep_assert_held(&local->chanctx_mtx);
532
533 if (!local->use_chanctx) {
534 struct cfg80211_chan_def *chandef = &local->_oper_chandef;
535 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
536 chandef->center_freq1 = chandef->chan->center_freq;
537 chandef->center_freq2 = 0;
538
539
540
541
542 WARN_ON(local->hw.conf.radar_enabled &&
543 !list_empty(&local->chanctx_list));
544
545 local->hw.conf.radar_enabled = false;
546
547 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
548 } else {
549 drv_remove_chanctx(local, ctx);
550 }
551
552 ieee80211_recalc_idle(local);
553}
554
555static void ieee80211_free_chanctx(struct ieee80211_local *local,
556 struct ieee80211_chanctx *ctx)
557{
558 lockdep_assert_held(&local->chanctx_mtx);
559
560 WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0);
561
562 list_del_rcu(&ctx->list);
563 ieee80211_del_chanctx(local, ctx);
564 kfree_rcu(ctx, rcu_head);
565}
566
567void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
568 struct ieee80211_chanctx *ctx)
569{
570 struct ieee80211_chanctx_conf *conf = &ctx->conf;
571 struct ieee80211_sub_if_data *sdata;
572 const struct cfg80211_chan_def *compat = NULL;
573 struct sta_info *sta;
574
575 lockdep_assert_held(&local->chanctx_mtx);
576
577 rcu_read_lock();
578 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
579
580 if (!ieee80211_sdata_running(sdata))
581 continue;
582 if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf)
583 continue;
584 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
585 continue;
586
587 if (!compat)
588 compat = &sdata->vif.bss_conf.chandef;
589
590 compat = cfg80211_chandef_compatible(
591 &sdata->vif.bss_conf.chandef, compat);
592 if (WARN_ON_ONCE(!compat))
593 break;
594 }
595
596
597 list_for_each_entry_rcu(sta, &local->sta_list, list) {
598 if (!sta->uploaded ||
599 !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) ||
600 !test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
601 !sta->tdls_chandef.chan)
602 continue;
603
604 compat = cfg80211_chandef_compatible(&sta->tdls_chandef,
605 compat);
606 if (WARN_ON_ONCE(!compat))
607 break;
608 }
609 rcu_read_unlock();
610
611 if (!compat)
612 return;
613
614 ieee80211_change_chanctx(local, ctx, compat);
615}
616
617static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
618 struct ieee80211_chanctx *chanctx)
619{
620 bool radar_enabled;
621
622 lockdep_assert_held(&local->chanctx_mtx);
623
624 lockdep_assert_held(&local->mtx);
625
626 radar_enabled = ieee80211_chanctx_radar_required(local, chanctx);
627
628 if (radar_enabled == chanctx->conf.radar_enabled)
629 return;
630
631 chanctx->conf.radar_enabled = radar_enabled;
632
633 if (!local->use_chanctx) {
634 local->hw.conf.radar_enabled = chanctx->conf.radar_enabled;
635 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
636 }
637
638 drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR);
639}
640
641static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata,
642 struct ieee80211_chanctx *new_ctx)
643{
644 struct ieee80211_local *local = sdata->local;
645 struct ieee80211_chanctx_conf *conf;
646 struct ieee80211_chanctx *curr_ctx = NULL;
647 int ret = 0;
648
649 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
650 lockdep_is_held(&local->chanctx_mtx));
651
652 if (conf) {
653 curr_ctx = container_of(conf, struct ieee80211_chanctx, conf);
654
655 drv_unassign_vif_chanctx(local, sdata, curr_ctx);
656 conf = NULL;
657 list_del(&sdata->assigned_chanctx_list);
658 }
659
660 if (new_ctx) {
661 ret = drv_assign_vif_chanctx(local, sdata, new_ctx);
662 if (ret)
663 goto out;
664
665 conf = &new_ctx->conf;
666 list_add(&sdata->assigned_chanctx_list,
667 &new_ctx->assigned_vifs);
668 }
669
670out:
671 rcu_assign_pointer(sdata->vif.chanctx_conf, conf);
672
673 sdata->vif.bss_conf.idle = !conf;
674
675 if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) {
676 ieee80211_recalc_chanctx_chantype(local, curr_ctx);
677 ieee80211_recalc_smps_chanctx(local, curr_ctx);
678 ieee80211_recalc_radar_chanctx(local, curr_ctx);
679 ieee80211_recalc_chanctx_min_def(local, curr_ctx);
680 }
681
682 if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) {
683 ieee80211_recalc_txpower(sdata, false);
684 ieee80211_recalc_chanctx_min_def(local, new_ctx);
685 }
686
687 if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
688 sdata->vif.type != NL80211_IFTYPE_MONITOR)
689 ieee80211_bss_info_change_notify(sdata,
690 BSS_CHANGED_IDLE);
691
692 ieee80211_check_fast_xmit_iface(sdata);
693
694 return ret;
695}
696
697void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
698 struct ieee80211_chanctx *chanctx)
699{
700 struct ieee80211_sub_if_data *sdata;
701 u8 rx_chains_static, rx_chains_dynamic;
702
703 lockdep_assert_held(&local->chanctx_mtx);
704
705 rx_chains_static = 1;
706 rx_chains_dynamic = 1;
707
708 rcu_read_lock();
709 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
710 u8 needed_static, needed_dynamic;
711
712 if (!ieee80211_sdata_running(sdata))
713 continue;
714
715 if (rcu_access_pointer(sdata->vif.chanctx_conf) !=
716 &chanctx->conf)
717 continue;
718
719 switch (sdata->vif.type) {
720 case NL80211_IFTYPE_P2P_DEVICE:
721 continue;
722 case NL80211_IFTYPE_STATION:
723 if (!sdata->u.mgd.associated)
724 continue;
725 break;
726 case NL80211_IFTYPE_AP_VLAN:
727 continue;
728 case NL80211_IFTYPE_AP:
729 case NL80211_IFTYPE_ADHOC:
730 case NL80211_IFTYPE_WDS:
731 case NL80211_IFTYPE_MESH_POINT:
732 case NL80211_IFTYPE_OCB:
733 break;
734 default:
735 WARN_ON_ONCE(1);
736 }
737
738 switch (sdata->smps_mode) {
739 default:
740 WARN_ONCE(1, "Invalid SMPS mode %d\n",
741 sdata->smps_mode);
742
743 case IEEE80211_SMPS_OFF:
744 needed_static = sdata->needed_rx_chains;
745 needed_dynamic = sdata->needed_rx_chains;
746 break;
747 case IEEE80211_SMPS_DYNAMIC:
748 needed_static = 1;
749 needed_dynamic = sdata->needed_rx_chains;
750 break;
751 case IEEE80211_SMPS_STATIC:
752 needed_static = 1;
753 needed_dynamic = 1;
754 break;
755 }
756
757 rx_chains_static = max(rx_chains_static, needed_static);
758 rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic);
759 }
760
761
762 sdata = rcu_dereference(local->monitor_sdata);
763 if (sdata &&
764 rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf)
765 rx_chains_dynamic = rx_chains_static = local->rx_chains;
766
767 rcu_read_unlock();
768
769 if (!local->use_chanctx) {
770 if (rx_chains_static > 1)
771 local->smps_mode = IEEE80211_SMPS_OFF;
772 else if (rx_chains_dynamic > 1)
773 local->smps_mode = IEEE80211_SMPS_DYNAMIC;
774 else
775 local->smps_mode = IEEE80211_SMPS_STATIC;
776 ieee80211_hw_config(local, 0);
777 }
778
779 if (rx_chains_static == chanctx->conf.rx_chains_static &&
780 rx_chains_dynamic == chanctx->conf.rx_chains_dynamic)
781 return;
782
783 chanctx->conf.rx_chains_static = rx_chains_static;
784 chanctx->conf.rx_chains_dynamic = rx_chains_dynamic;
785 drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS);
786}
787
788static void
789__ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
790 bool clear)
791{
792 struct ieee80211_local *local __maybe_unused = sdata->local;
793 struct ieee80211_sub_if_data *vlan;
794 struct ieee80211_chanctx_conf *conf;
795
796 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP))
797 return;
798
799 lockdep_assert_held(&local->mtx);
800
801
802
803
804
805
806
807 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
808 lockdep_is_held(&local->chanctx_mtx));
809 WARN_ON(!conf);
810
811 if (clear)
812 conf = NULL;
813
814 list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
815 rcu_assign_pointer(vlan->vif.chanctx_conf, conf);
816}
817
818void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
819 bool clear)
820{
821 struct ieee80211_local *local = sdata->local;
822
823 mutex_lock(&local->chanctx_mtx);
824
825 __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear);
826
827 mutex_unlock(&local->chanctx_mtx);
828}
829
830int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata)
831{
832 struct ieee80211_chanctx *ctx = sdata->reserved_chanctx;
833
834 lockdep_assert_held(&sdata->local->chanctx_mtx);
835
836 if (WARN_ON(!ctx))
837 return -EINVAL;
838
839 list_del(&sdata->reserved_chanctx_list);
840 sdata->reserved_chanctx = NULL;
841
842 if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) {
843 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) {
844 if (WARN_ON(!ctx->replace_ctx))
845 return -EINVAL;
846
847 WARN_ON(ctx->replace_ctx->replace_state !=
848 IEEE80211_CHANCTX_WILL_BE_REPLACED);
849 WARN_ON(ctx->replace_ctx->replace_ctx != ctx);
850
851 ctx->replace_ctx->replace_ctx = NULL;
852 ctx->replace_ctx->replace_state =
853 IEEE80211_CHANCTX_REPLACE_NONE;
854
855 list_del_rcu(&ctx->list);
856 kfree_rcu(ctx, rcu_head);
857 } else {
858 ieee80211_free_chanctx(sdata->local, ctx);
859 }
860 }
861
862 return 0;
863}
864
865int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
866 const struct cfg80211_chan_def *chandef,
867 enum ieee80211_chanctx_mode mode,
868 bool radar_required)
869{
870 struct ieee80211_local *local = sdata->local;
871 struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx;
872
873 lockdep_assert_held(&local->chanctx_mtx);
874
875 curr_ctx = ieee80211_vif_get_chanctx(sdata);
876 if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx)
877 return -ENOTSUPP;
878
879 new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode);
880 if (!new_ctx) {
881 if (ieee80211_can_create_new_chanctx(local)) {
882 new_ctx = ieee80211_new_chanctx(local, chandef, mode);
883 if (IS_ERR(new_ctx))
884 return PTR_ERR(new_ctx);
885 } else {
886 if (!curr_ctx ||
887 (curr_ctx->replace_state ==
888 IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
889 !list_empty(&curr_ctx->reserved_vifs)) {
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912 list_for_each_entry(ctx, &local->chanctx_list,
913 list) {
914 if (ctx->replace_state !=
915 IEEE80211_CHANCTX_REPLACE_NONE)
916 continue;
917
918 if (!list_empty(&ctx->reserved_vifs))
919 continue;
920
921 curr_ctx = ctx;
922 break;
923 }
924 }
925
926
927
928
929
930 if (!curr_ctx ||
931 (curr_ctx->replace_state ==
932 IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
933 !list_empty(&curr_ctx->reserved_vifs))
934 return -EBUSY;
935
936 new_ctx = ieee80211_alloc_chanctx(local, chandef, mode);
937 if (!new_ctx)
938 return -ENOMEM;
939
940 new_ctx->replace_ctx = curr_ctx;
941 new_ctx->replace_state =
942 IEEE80211_CHANCTX_REPLACES_OTHER;
943
944 curr_ctx->replace_ctx = new_ctx;
945 curr_ctx->replace_state =
946 IEEE80211_CHANCTX_WILL_BE_REPLACED;
947
948 list_add_rcu(&new_ctx->list, &local->chanctx_list);
949 }
950 }
951
952 list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs);
953 sdata->reserved_chanctx = new_ctx;
954 sdata->reserved_chandef = *chandef;
955 sdata->reserved_radar_required = radar_required;
956 sdata->reserved_ready = false;
957
958 return 0;
959}
960
961static void
962ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata)
963{
964 switch (sdata->vif.type) {
965 case NL80211_IFTYPE_ADHOC:
966 case NL80211_IFTYPE_AP:
967 case NL80211_IFTYPE_MESH_POINT:
968 case NL80211_IFTYPE_OCB:
969 ieee80211_queue_work(&sdata->local->hw,
970 &sdata->csa_finalize_work);
971 break;
972 case NL80211_IFTYPE_STATION:
973 ieee80211_queue_work(&sdata->local->hw,
974 &sdata->u.mgd.chswitch_work);
975 break;
976 case NL80211_IFTYPE_UNSPECIFIED:
977 case NL80211_IFTYPE_AP_VLAN:
978 case NL80211_IFTYPE_WDS:
979 case NL80211_IFTYPE_MONITOR:
980 case NL80211_IFTYPE_P2P_CLIENT:
981 case NL80211_IFTYPE_P2P_GO:
982 case NL80211_IFTYPE_P2P_DEVICE:
983 case NUM_NL80211_IFTYPES:
984 WARN_ON(1);
985 break;
986 }
987}
988
989static void
990ieee80211_vif_update_chandef(struct ieee80211_sub_if_data *sdata,
991 const struct cfg80211_chan_def *chandef)
992{
993 struct ieee80211_sub_if_data *vlan;
994
995 sdata->vif.bss_conf.chandef = *chandef;
996
997 if (sdata->vif.type != NL80211_IFTYPE_AP)
998 return;
999
1000 list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
1001 vlan->vif.bss_conf.chandef = *chandef;
1002}
1003
1004static int
1005ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata)
1006{
1007 struct ieee80211_local *local = sdata->local;
1008 struct ieee80211_vif_chanctx_switch vif_chsw[1] = {};
1009 struct ieee80211_chanctx *old_ctx, *new_ctx;
1010 const struct cfg80211_chan_def *chandef;
1011 u32 changed = 0;
1012 int err;
1013
1014 lockdep_assert_held(&local->mtx);
1015 lockdep_assert_held(&local->chanctx_mtx);
1016
1017 new_ctx = sdata->reserved_chanctx;
1018 old_ctx = ieee80211_vif_get_chanctx(sdata);
1019
1020 if (WARN_ON(!sdata->reserved_ready))
1021 return -EBUSY;
1022
1023 if (WARN_ON(!new_ctx))
1024 return -EINVAL;
1025
1026 if (WARN_ON(!old_ctx))
1027 return -EINVAL;
1028
1029 if (WARN_ON(new_ctx->replace_state ==
1030 IEEE80211_CHANCTX_REPLACES_OTHER))
1031 return -EINVAL;
1032
1033 chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx,
1034 &sdata->reserved_chandef);
1035 if (WARN_ON(!chandef))
1036 return -EINVAL;
1037
1038 ieee80211_change_chanctx(local, new_ctx, chandef);
1039
1040 vif_chsw[0].vif = &sdata->vif;
1041 vif_chsw[0].old_ctx = &old_ctx->conf;
1042 vif_chsw[0].new_ctx = &new_ctx->conf;
1043
1044 list_del(&sdata->reserved_chanctx_list);
1045 sdata->reserved_chanctx = NULL;
1046
1047 err = drv_switch_vif_chanctx(local, vif_chsw, 1,
1048 CHANCTX_SWMODE_REASSIGN_VIF);
1049 if (err) {
1050 if (ieee80211_chanctx_refcount(local, new_ctx) == 0)
1051 ieee80211_free_chanctx(local, new_ctx);
1052
1053 goto out;
1054 }
1055
1056 list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs);
1057 rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf);
1058
1059 if (sdata->vif.type == NL80211_IFTYPE_AP)
1060 __ieee80211_vif_copy_chanctx_to_vlans(sdata, false);
1061
1062 ieee80211_check_fast_xmit_iface(sdata);
1063
1064 if (ieee80211_chanctx_refcount(local, old_ctx) == 0)
1065 ieee80211_free_chanctx(local, old_ctx);
1066
1067 if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width)
1068 changed = BSS_CHANGED_BANDWIDTH;
1069
1070 ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef);
1071
1072 ieee80211_recalc_smps_chanctx(local, new_ctx);
1073 ieee80211_recalc_radar_chanctx(local, new_ctx);
1074 ieee80211_recalc_chanctx_min_def(local, new_ctx);
1075
1076 if (changed)
1077 ieee80211_bss_info_change_notify(sdata, changed);
1078
1079out:
1080 ieee80211_vif_chanctx_reservation_complete(sdata);
1081 return err;
1082}
1083
1084static int
1085ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata)
1086{
1087 struct ieee80211_local *local = sdata->local;
1088 struct ieee80211_chanctx *old_ctx, *new_ctx;
1089 const struct cfg80211_chan_def *chandef;
1090 int err;
1091
1092 old_ctx = ieee80211_vif_get_chanctx(sdata);
1093 new_ctx = sdata->reserved_chanctx;
1094
1095 if (WARN_ON(!sdata->reserved_ready))
1096 return -EINVAL;
1097
1098 if (WARN_ON(old_ctx))
1099 return -EINVAL;
1100
1101 if (WARN_ON(!new_ctx))
1102 return -EINVAL;
1103
1104 if (WARN_ON(new_ctx->replace_state ==
1105 IEEE80211_CHANCTX_REPLACES_OTHER))
1106 return -EINVAL;
1107
1108 chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx,
1109 &sdata->reserved_chandef);
1110 if (WARN_ON(!chandef))
1111 return -EINVAL;
1112
1113 ieee80211_change_chanctx(local, new_ctx, chandef);
1114
1115 list_del(&sdata->reserved_chanctx_list);
1116 sdata->reserved_chanctx = NULL;
1117
1118 err = ieee80211_assign_vif_chanctx(sdata, new_ctx);
1119 if (err) {
1120 if (ieee80211_chanctx_refcount(local, new_ctx) == 0)
1121 ieee80211_free_chanctx(local, new_ctx);
1122
1123 goto out;
1124 }
1125
1126out:
1127 ieee80211_vif_chanctx_reservation_complete(sdata);
1128 return err;
1129}
1130
1131static bool
1132ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata)
1133{
1134 struct ieee80211_chanctx *old_ctx, *new_ctx;
1135
1136 lockdep_assert_held(&sdata->local->chanctx_mtx);
1137
1138 new_ctx = sdata->reserved_chanctx;
1139 old_ctx = ieee80211_vif_get_chanctx(sdata);
1140
1141 if (!old_ctx)
1142 return false;
1143
1144 if (WARN_ON(!new_ctx))
1145 return false;
1146
1147 if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED)
1148 return false;
1149
1150 if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1151 return false;
1152
1153 return true;
1154}
1155
1156static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local,
1157 struct ieee80211_chanctx *new_ctx)
1158{
1159 const struct cfg80211_chan_def *chandef;
1160
1161 lockdep_assert_held(&local->mtx);
1162 lockdep_assert_held(&local->chanctx_mtx);
1163
1164 chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL);
1165 if (WARN_ON(!chandef))
1166 return -EINVAL;
1167
1168 local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled;
1169 local->_oper_chandef = *chandef;
1170 ieee80211_hw_config(local, 0);
1171
1172 return 0;
1173}
1174
1175static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local,
1176 int n_vifs)
1177{
1178 struct ieee80211_vif_chanctx_switch *vif_chsw;
1179 struct ieee80211_sub_if_data *sdata;
1180 struct ieee80211_chanctx *ctx, *old_ctx;
1181 int i, err;
1182
1183 lockdep_assert_held(&local->mtx);
1184 lockdep_assert_held(&local->chanctx_mtx);
1185
1186 vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL);
1187 if (!vif_chsw)
1188 return -ENOMEM;
1189
1190 i = 0;
1191 list_for_each_entry(ctx, &local->chanctx_list, list) {
1192 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1193 continue;
1194
1195 if (WARN_ON(!ctx->replace_ctx)) {
1196 err = -EINVAL;
1197 goto out;
1198 }
1199
1200 list_for_each_entry(sdata, &ctx->reserved_vifs,
1201 reserved_chanctx_list) {
1202 if (!ieee80211_vif_has_in_place_reservation(
1203 sdata))
1204 continue;
1205
1206 old_ctx = ieee80211_vif_get_chanctx(sdata);
1207 vif_chsw[i].vif = &sdata->vif;
1208 vif_chsw[i].old_ctx = &old_ctx->conf;
1209 vif_chsw[i].new_ctx = &ctx->conf;
1210
1211 i++;
1212 }
1213 }
1214
1215 err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs,
1216 CHANCTX_SWMODE_SWAP_CONTEXTS);
1217
1218out:
1219 kfree(vif_chsw);
1220 return err;
1221}
1222
1223static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local)
1224{
1225 struct ieee80211_chanctx *ctx;
1226 int err;
1227
1228 lockdep_assert_held(&local->mtx);
1229 lockdep_assert_held(&local->chanctx_mtx);
1230
1231 list_for_each_entry(ctx, &local->chanctx_list, list) {
1232 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1233 continue;
1234
1235 if (!list_empty(&ctx->replace_ctx->assigned_vifs))
1236 continue;
1237
1238 ieee80211_del_chanctx(local, ctx->replace_ctx);
1239 err = ieee80211_add_chanctx(local, ctx);
1240 if (err)
1241 goto err;
1242 }
1243
1244 return 0;
1245
1246err:
1247 WARN_ON(ieee80211_add_chanctx(local, ctx));
1248 list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) {
1249 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1250 continue;
1251
1252 if (!list_empty(&ctx->replace_ctx->assigned_vifs))
1253 continue;
1254
1255 ieee80211_del_chanctx(local, ctx);
1256 WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx));
1257 }
1258
1259 return err;
1260}
1261
1262static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local)
1263{
1264 struct ieee80211_sub_if_data *sdata, *sdata_tmp;
1265 struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx;
1266 struct ieee80211_chanctx *new_ctx = NULL;
1267 int i, err, n_assigned, n_reserved, n_ready;
1268 int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0;
1269
1270 lockdep_assert_held(&local->mtx);
1271 lockdep_assert_held(&local->chanctx_mtx);
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289 list_for_each_entry(ctx, &local->chanctx_list, list) {
1290 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1291 continue;
1292
1293 if (WARN_ON(!ctx->replace_ctx)) {
1294 err = -EINVAL;
1295 goto err;
1296 }
1297
1298 if (!local->use_chanctx)
1299 new_ctx = ctx;
1300
1301 n_ctx++;
1302
1303 n_assigned = 0;
1304 n_reserved = 0;
1305 n_ready = 0;
1306
1307 list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs,
1308 assigned_chanctx_list) {
1309 n_assigned++;
1310 if (sdata->reserved_chanctx) {
1311 n_reserved++;
1312 if (sdata->reserved_ready)
1313 n_ready++;
1314 }
1315 }
1316
1317 if (n_assigned != n_reserved) {
1318 if (n_ready == n_reserved) {
1319 wiphy_info(local->hw.wiphy,
1320 "channel context reservation cannot be finalized because some interfaces aren't switching\n");
1321 err = -EBUSY;
1322 goto err;
1323 }
1324
1325 return -EAGAIN;
1326 }
1327
1328 ctx->conf.radar_enabled = false;
1329 list_for_each_entry(sdata, &ctx->reserved_vifs,
1330 reserved_chanctx_list) {
1331 if (ieee80211_vif_has_in_place_reservation(sdata) &&
1332 !sdata->reserved_ready)
1333 return -EAGAIN;
1334
1335 old_ctx = ieee80211_vif_get_chanctx(sdata);
1336 if (old_ctx) {
1337 if (old_ctx->replace_state ==
1338 IEEE80211_CHANCTX_WILL_BE_REPLACED)
1339 n_vifs_switch++;
1340 else
1341 n_vifs_assign++;
1342 } else {
1343 n_vifs_ctxless++;
1344 }
1345
1346 if (sdata->reserved_radar_required)
1347 ctx->conf.radar_enabled = true;
1348 }
1349 }
1350
1351 if (WARN_ON(n_ctx == 0) ||
1352 WARN_ON(n_vifs_switch == 0 &&
1353 n_vifs_assign == 0 &&
1354 n_vifs_ctxless == 0) ||
1355 WARN_ON(n_ctx > 1 && !local->use_chanctx) ||
1356 WARN_ON(!new_ctx && !local->use_chanctx)) {
1357 err = -EINVAL;
1358 goto err;
1359 }
1360
1361
1362
1363
1364
1365
1366 if (local->use_chanctx) {
1367 if (n_vifs_switch > 0) {
1368 err = ieee80211_chsw_switch_vifs(local, n_vifs_switch);
1369 if (err)
1370 goto err;
1371 }
1372
1373 if (n_vifs_assign > 0 || n_vifs_ctxless > 0) {
1374 err = ieee80211_chsw_switch_ctxs(local);
1375 if (err)
1376 goto err;
1377 }
1378 } else {
1379 err = ieee80211_chsw_switch_hwconf(local, new_ctx);
1380 if (err)
1381 goto err;
1382 }
1383
1384
1385
1386
1387
1388
1389 i = 0;
1390 list_for_each_entry(ctx, &local->chanctx_list, list) {
1391 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1392 continue;
1393
1394 if (WARN_ON(!ctx->replace_ctx)) {
1395 err = -EINVAL;
1396 goto err;
1397 }
1398
1399 list_for_each_entry(sdata, &ctx->reserved_vifs,
1400 reserved_chanctx_list) {
1401 u32 changed = 0;
1402
1403 if (!ieee80211_vif_has_in_place_reservation(sdata))
1404 continue;
1405
1406 rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf);
1407
1408 if (sdata->vif.type == NL80211_IFTYPE_AP)
1409 __ieee80211_vif_copy_chanctx_to_vlans(sdata,
1410 false);
1411
1412 ieee80211_check_fast_xmit_iface(sdata);
1413
1414 sdata->radar_required = sdata->reserved_radar_required;
1415
1416 if (sdata->vif.bss_conf.chandef.width !=
1417 sdata->reserved_chandef.width)
1418 changed = BSS_CHANGED_BANDWIDTH;
1419
1420 ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef);
1421 if (changed)
1422 ieee80211_bss_info_change_notify(sdata,
1423 changed);
1424
1425 ieee80211_recalc_txpower(sdata, false);
1426 }
1427
1428 ieee80211_recalc_chanctx_chantype(local, ctx);
1429 ieee80211_recalc_smps_chanctx(local, ctx);
1430 ieee80211_recalc_radar_chanctx(local, ctx);
1431 ieee80211_recalc_chanctx_min_def(local, ctx);
1432
1433 list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs,
1434 reserved_chanctx_list) {
1435 if (ieee80211_vif_get_chanctx(sdata) != ctx)
1436 continue;
1437
1438 list_del(&sdata->reserved_chanctx_list);
1439 list_move(&sdata->assigned_chanctx_list,
1440 &ctx->assigned_vifs);
1441 sdata->reserved_chanctx = NULL;
1442
1443 ieee80211_vif_chanctx_reservation_complete(sdata);
1444 }
1445
1446
1447
1448
1449
1450
1451
1452
1453 list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs,
1454 reserved_chanctx_list) {
1455 if (WARN_ON(ieee80211_vif_has_in_place_reservation(
1456 sdata)))
1457 continue;
1458
1459 if (WARN_ON(sdata->reserved_chanctx != ctx))
1460 continue;
1461
1462 if (!sdata->reserved_ready)
1463 continue;
1464
1465 if (ieee80211_vif_get_chanctx(sdata))
1466 err = ieee80211_vif_use_reserved_reassign(
1467 sdata);
1468 else
1469 err = ieee80211_vif_use_reserved_assign(sdata);
1470
1471 if (err) {
1472 sdata_info(sdata,
1473 "failed to finalize (re-)assign reservation (err=%d)\n",
1474 err);
1475 ieee80211_vif_unreserve_chanctx(sdata);
1476 cfg80211_stop_iface(local->hw.wiphy,
1477 &sdata->wdev,
1478 GFP_KERNEL);
1479 }
1480 }
1481 }
1482
1483
1484
1485
1486
1487 list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) {
1488 if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED)
1489 continue;
1490
1491 ctx->replace_ctx->replace_ctx = NULL;
1492 ctx->replace_ctx->replace_state =
1493 IEEE80211_CHANCTX_REPLACE_NONE;
1494
1495 list_del_rcu(&ctx->list);
1496 kfree_rcu(ctx, rcu_head);
1497 }
1498
1499 return 0;
1500
1501err:
1502 list_for_each_entry(ctx, &local->chanctx_list, list) {
1503 if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
1504 continue;
1505
1506 list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs,
1507 reserved_chanctx_list) {
1508 ieee80211_vif_unreserve_chanctx(sdata);
1509 ieee80211_vif_chanctx_reservation_complete(sdata);
1510 }
1511 }
1512
1513 return err;
1514}
1515
1516static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
1517{
1518 struct ieee80211_local *local = sdata->local;
1519 struct ieee80211_chanctx_conf *conf;
1520 struct ieee80211_chanctx *ctx;
1521 bool use_reserved_switch = false;
1522
1523 lockdep_assert_held(&local->chanctx_mtx);
1524
1525 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1526 lockdep_is_held(&local->chanctx_mtx));
1527 if (!conf)
1528 return;
1529
1530 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1531
1532 if (sdata->reserved_chanctx) {
1533 if (sdata->reserved_chanctx->replace_state ==
1534 IEEE80211_CHANCTX_REPLACES_OTHER &&
1535 ieee80211_chanctx_num_reserved(local,
1536 sdata->reserved_chanctx) > 1)
1537 use_reserved_switch = true;
1538
1539 ieee80211_vif_unreserve_chanctx(sdata);
1540 }
1541
1542 ieee80211_assign_vif_chanctx(sdata, NULL);
1543 if (ieee80211_chanctx_refcount(local, ctx) == 0)
1544 ieee80211_free_chanctx(local, ctx);
1545
1546 sdata->radar_required = false;
1547
1548
1549 if (use_reserved_switch)
1550 ieee80211_vif_use_reserved_switch(local);
1551}
1552
1553int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
1554 const struct cfg80211_chan_def *chandef,
1555 enum ieee80211_chanctx_mode mode)
1556{
1557 struct ieee80211_local *local = sdata->local;
1558 struct ieee80211_chanctx *ctx;
1559 u8 radar_detect_width = 0;
1560 int ret;
1561
1562 lockdep_assert_held(&local->mtx);
1563
1564 WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
1565
1566 mutex_lock(&local->chanctx_mtx);
1567
1568 ret = cfg80211_chandef_dfs_required(local->hw.wiphy,
1569 chandef,
1570 sdata->wdev.iftype);
1571 if (ret < 0)
1572 goto out;
1573 if (ret > 0)
1574 radar_detect_width = BIT(chandef->width);
1575
1576 sdata->radar_required = ret;
1577
1578 ret = ieee80211_check_combinations(sdata, chandef, mode,
1579 radar_detect_width);
1580 if (ret < 0)
1581 goto out;
1582
1583 __ieee80211_vif_release_channel(sdata);
1584
1585 ctx = ieee80211_find_chanctx(local, chandef, mode);
1586 if (!ctx)
1587 ctx = ieee80211_new_chanctx(local, chandef, mode);
1588 if (IS_ERR(ctx)) {
1589 ret = PTR_ERR(ctx);
1590 goto out;
1591 }
1592
1593 ieee80211_vif_update_chandef(sdata, chandef);
1594
1595 ret = ieee80211_assign_vif_chanctx(sdata, ctx);
1596 if (ret) {
1597
1598 if (ieee80211_chanctx_refcount(local, ctx) == 0)
1599 ieee80211_free_chanctx(local, ctx);
1600 goto out;
1601 }
1602
1603 ieee80211_recalc_smps_chanctx(local, ctx);
1604 ieee80211_recalc_radar_chanctx(local, ctx);
1605 out:
1606 if (ret)
1607 sdata->radar_required = false;
1608
1609 mutex_unlock(&local->chanctx_mtx);
1610 return ret;
1611}
1612
1613int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata)
1614{
1615 struct ieee80211_local *local = sdata->local;
1616 struct ieee80211_chanctx *new_ctx;
1617 struct ieee80211_chanctx *old_ctx;
1618 int err;
1619
1620 lockdep_assert_held(&local->mtx);
1621 lockdep_assert_held(&local->chanctx_mtx);
1622
1623 new_ctx = sdata->reserved_chanctx;
1624 old_ctx = ieee80211_vif_get_chanctx(sdata);
1625
1626 if (WARN_ON(!new_ctx))
1627 return -EINVAL;
1628
1629 if (WARN_ON(new_ctx->replace_state ==
1630 IEEE80211_CHANCTX_WILL_BE_REPLACED))
1631 return -EINVAL;
1632
1633 if (WARN_ON(sdata->reserved_ready))
1634 return -EINVAL;
1635
1636 sdata->reserved_ready = true;
1637
1638 if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) {
1639 if (old_ctx)
1640 err = ieee80211_vif_use_reserved_reassign(sdata);
1641 else
1642 err = ieee80211_vif_use_reserved_assign(sdata);
1643
1644 if (err)
1645 return err;
1646 }
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659 if ((old_ctx &&
1660 old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
1661 new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) {
1662 err = ieee80211_vif_use_reserved_switch(local);
1663 if (err && err != -EAGAIN) {
1664 if (new_ctx->replace_state ==
1665 IEEE80211_CHANCTX_REPLACES_OTHER)
1666 return err;
1667
1668 wiphy_info(local->hw.wiphy,
1669 "depending in-place reservation failed (err=%d)\n",
1670 err);
1671 }
1672 }
1673
1674 return 0;
1675}
1676
1677int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
1678 const struct cfg80211_chan_def *chandef,
1679 u32 *changed)
1680{
1681 struct ieee80211_local *local = sdata->local;
1682 struct ieee80211_chanctx_conf *conf;
1683 struct ieee80211_chanctx *ctx;
1684 const struct cfg80211_chan_def *compat;
1685 int ret;
1686
1687 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
1688 IEEE80211_CHAN_DISABLED))
1689 return -EINVAL;
1690
1691 mutex_lock(&local->chanctx_mtx);
1692 if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) {
1693 ret = 0;
1694 goto out;
1695 }
1696
1697 if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT ||
1698 sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) {
1699 ret = -EINVAL;
1700 goto out;
1701 }
1702
1703 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1704 lockdep_is_held(&local->chanctx_mtx));
1705 if (!conf) {
1706 ret = -EINVAL;
1707 goto out;
1708 }
1709
1710 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1711
1712 compat = cfg80211_chandef_compatible(&conf->def, chandef);
1713 if (!compat) {
1714 ret = -EINVAL;
1715 goto out;
1716 }
1717
1718 switch (ctx->replace_state) {
1719 case IEEE80211_CHANCTX_REPLACE_NONE:
1720 if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) {
1721 ret = -EBUSY;
1722 goto out;
1723 }
1724 break;
1725 case IEEE80211_CHANCTX_WILL_BE_REPLACED:
1726
1727
1728 ret = -EBUSY;
1729 goto out;
1730 case IEEE80211_CHANCTX_REPLACES_OTHER:
1731
1732
1733
1734 WARN_ON(1);
1735 break;
1736 }
1737
1738 ieee80211_vif_update_chandef(sdata, chandef);
1739
1740 ieee80211_recalc_chanctx_chantype(local, ctx);
1741
1742 *changed |= BSS_CHANGED_BANDWIDTH;
1743 ret = 0;
1744 out:
1745 mutex_unlock(&local->chanctx_mtx);
1746 return ret;
1747}
1748
1749void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata)
1750{
1751 WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
1752
1753 lockdep_assert_held(&sdata->local->mtx);
1754
1755 mutex_lock(&sdata->local->chanctx_mtx);
1756 __ieee80211_vif_release_channel(sdata);
1757 mutex_unlock(&sdata->local->chanctx_mtx);
1758}
1759
1760void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata)
1761{
1762 struct ieee80211_local *local = sdata->local;
1763 struct ieee80211_sub_if_data *ap;
1764 struct ieee80211_chanctx_conf *conf;
1765
1766 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss))
1767 return;
1768
1769 ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
1770
1771 mutex_lock(&local->chanctx_mtx);
1772
1773 conf = rcu_dereference_protected(ap->vif.chanctx_conf,
1774 lockdep_is_held(&local->chanctx_mtx));
1775 rcu_assign_pointer(sdata->vif.chanctx_conf, conf);
1776 mutex_unlock(&local->chanctx_mtx);
1777}
1778
1779void ieee80211_iter_chan_contexts_atomic(
1780 struct ieee80211_hw *hw,
1781 void (*iter)(struct ieee80211_hw *hw,
1782 struct ieee80211_chanctx_conf *chanctx_conf,
1783 void *data),
1784 void *iter_data)
1785{
1786 struct ieee80211_local *local = hw_to_local(hw);
1787 struct ieee80211_chanctx *ctx;
1788
1789 rcu_read_lock();
1790 list_for_each_entry_rcu(ctx, &local->chanctx_list, list)
1791 if (ctx->driver_present)
1792 iter(hw, &ctx->conf, iter_data);
1793 rcu_read_unlock();
1794}
1795EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic);
1796
