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 | ||
234 | if (!sta->uploaded) | |
235 | continue; | |
236 | ||
237 | max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); | |
238 | } | |
239 | rcu_read_unlock(); | |
240 | ||
241 | return max_bw; | |
242 | } | |
243 | ||
244 | static enum nl80211_chan_width | |
245 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
246 | struct ieee80211_chanctx_conf *conf) | |
247 | { | |
248 | struct ieee80211_sub_if_data *sdata; | |
249 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
250 | ||
251 | rcu_read_lock(); | |
252 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
253 | struct ieee80211_vif *vif = &sdata->vif; | |
254 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; | |
255 | ||
256 | if (!ieee80211_sdata_running(sdata)) | |
257 | continue; | |
258 | ||
259 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
260 | continue; | |
261 | ||
262 | switch (vif->type) { | |
263 | case NL80211_IFTYPE_AP: | |
264 | case NL80211_IFTYPE_AP_VLAN: | |
265 | width = ieee80211_get_max_required_bw(sdata); | |
266 | break; | |
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 EP |
276 | case NL80211_IFTYPE_P2P_DEVICE: |
277 | continue; | |
21f659bf EP |
278 | case NL80211_IFTYPE_ADHOC: |
279 | case NL80211_IFTYPE_WDS: | |
280 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 281 | case NL80211_IFTYPE_OCB: |
21f659bf EP |
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 | } | |
1c37a72c EP |
293 | |
294 | /* use the configured bandwidth in case of monitor interface */ | |
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 | ||
21f659bf EP |
299 | rcu_read_unlock(); |
300 | ||
301 | return max_bw; | |
302 | } | |
303 | ||
304 | /* | |
305 | * recalc the min required chan width of the channel context, which is | |
306 | * the max of min required widths of all the interfaces bound to this | |
307 | * channel context. | |
308 | */ | |
309 | void 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 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
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 | /* downgrade chandef up to max_bw */ | |
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 | ||
18942d3b | 342 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
343 | struct ieee80211_chanctx *ctx, |
344 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 345 | { |
4bf88530 | 346 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) |
e89a96f5 | 347 | return; |
0aaffa9b | 348 | |
4bf88530 JB |
349 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
350 | ||
351 | ctx->conf.def = *chandef; | |
352 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 353 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
354 | |
355 | if (!local->use_chanctx) { | |
675a0b04 | 356 | local->_oper_chandef = *chandef; |
55de908a JB |
357 | ieee80211_hw_config(local, 0); |
358 | } | |
0aaffa9b | 359 | } |
d01a1e65 MK |
360 | |
361 | static struct ieee80211_chanctx * | |
362 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 363 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
364 | enum ieee80211_chanctx_mode mode) |
365 | { | |
366 | struct ieee80211_chanctx *ctx; | |
367 | ||
368 | lockdep_assert_held(&local->chanctx_mtx); | |
369 | ||
370 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
371 | return NULL; | |
d01a1e65 MK |
372 | |
373 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 374 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 375 | |
5bcae31d MK |
376 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
377 | continue; | |
378 | ||
d01a1e65 MK |
379 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
380 | continue; | |
4bf88530 JB |
381 | |
382 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
383 | if (!compat) | |
d01a1e65 MK |
384 | continue; |
385 | ||
0288157b MK |
386 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
387 | compat); | |
388 | if (!compat) | |
389 | continue; | |
390 | ||
18942d3b | 391 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 392 | |
d01a1e65 MK |
393 | return ctx; |
394 | } | |
395 | ||
396 | return NULL; | |
397 | } | |
398 | ||
5cbc95a7 | 399 | bool ieee80211_is_radar_required(struct ieee80211_local *local) |
e4746851 SW |
400 | { |
401 | struct ieee80211_sub_if_data *sdata; | |
402 | ||
cc901de1 MK |
403 | lockdep_assert_held(&local->mtx); |
404 | ||
e4746851 SW |
405 | rcu_read_lock(); |
406 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
407 | if (sdata->radar_required) { | |
408 | rcu_read_unlock(); | |
409 | return true; | |
410 | } | |
411 | } | |
412 | rcu_read_unlock(); | |
413 | ||
414 | return false; | |
415 | } | |
416 | ||
e7f2337a EP |
417 | static bool |
418 | ieee80211_chanctx_radar_required(struct ieee80211_local *local, | |
419 | struct ieee80211_chanctx *ctx) | |
420 | { | |
421 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
422 | struct ieee80211_sub_if_data *sdata; | |
423 | bool required = false; | |
424 | ||
425 | lockdep_assert_held(&local->chanctx_mtx); | |
426 | lockdep_assert_held(&local->mtx); | |
427 | ||
428 | rcu_read_lock(); | |
429 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
430 | if (!ieee80211_sdata_running(sdata)) | |
431 | continue; | |
432 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
433 | continue; | |
434 | if (!sdata->radar_required) | |
435 | continue; | |
436 | ||
437 | required = true; | |
438 | break; | |
439 | } | |
440 | rcu_read_unlock(); | |
441 | ||
442 | return required; | |
443 | } | |
444 | ||
d01a1e65 | 445 | static struct ieee80211_chanctx * |
ed68ebca MK |
446 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
447 | const struct cfg80211_chan_def *chandef, | |
448 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
449 | { |
450 | struct ieee80211_chanctx *ctx; | |
451 | ||
452 | lockdep_assert_held(&local->chanctx_mtx); | |
453 | ||
454 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
455 | if (!ctx) | |
ed68ebca | 456 | return NULL; |
d01a1e65 | 457 | |
484298ad | 458 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 459 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 460 | ctx->conf.def = *chandef; |
04ecd257 JB |
461 | ctx->conf.rx_chains_static = 1; |
462 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 463 | ctx->mode = mode; |
e7f2337a | 464 | ctx->conf.radar_enabled = false; |
21f659bf | 465 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
466 | |
467 | return ctx; | |
468 | } | |
469 | ||
470 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
471 | struct ieee80211_chanctx *ctx) | |
472 | { | |
473 | u32 changed; | |
474 | int err; | |
475 | ||
476 | lockdep_assert_held(&local->mtx); | |
477 | lockdep_assert_held(&local->chanctx_mtx); | |
478 | ||
e4746851 SW |
479 | if (!local->use_chanctx) |
480 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 481 | |
382a103b JB |
482 | /* turn idle off *before* setting channel -- some drivers need that */ |
483 | changed = ieee80211_idle_off(local); | |
484 | if (changed) | |
485 | ieee80211_hw_config(local, changed); | |
486 | ||
55de908a | 487 | if (!local->use_chanctx) { |
ed68ebca | 488 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 489 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
490 | } else { |
491 | err = drv_add_chanctx(local, ctx); | |
492 | if (err) { | |
382a103b | 493 | ieee80211_recalc_idle(local); |
ed68ebca | 494 | return err; |
55de908a | 495 | } |
35f2fce9 MK |
496 | } |
497 | ||
ed68ebca MK |
498 | return 0; |
499 | } | |
500 | ||
501 | static struct ieee80211_chanctx * | |
502 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
503 | const struct cfg80211_chan_def *chandef, | |
504 | enum ieee80211_chanctx_mode mode) | |
505 | { | |
506 | struct ieee80211_chanctx *ctx; | |
507 | int err; | |
d01a1e65 | 508 | |
ed68ebca MK |
509 | lockdep_assert_held(&local->mtx); |
510 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 511 | |
ed68ebca MK |
512 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
513 | if (!ctx) | |
514 | return ERR_PTR(-ENOMEM); | |
515 | ||
516 | err = ieee80211_add_chanctx(local, ctx); | |
517 | if (err) { | |
518 | kfree(ctx); | |
519 | return ERR_PTR(err); | |
520 | } | |
521 | ||
522 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
523 | return ctx; |
524 | } | |
525 | ||
1f0d54cd MK |
526 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
527 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
528 | { |
529 | lockdep_assert_held(&local->chanctx_mtx); | |
530 | ||
55de908a | 531 | if (!local->use_chanctx) { |
675a0b04 KB |
532 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
533 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
534 | chandef->center_freq1 = chandef->chan->center_freq; | |
535 | chandef->center_freq2 = 0; | |
e4746851 SW |
536 | |
537 | /* NOTE: Disabling radar is only valid here for | |
538 | * single channel context. To be sure, check it ... | |
539 | */ | |
1f0d54cd MK |
540 | WARN_ON(local->hw.conf.radar_enabled && |
541 | !list_empty(&local->chanctx_list)); | |
542 | ||
e4746851 SW |
543 | local->hw.conf.radar_enabled = false; |
544 | ||
9b4816f5 | 545 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
546 | } else { |
547 | drv_remove_chanctx(local, ctx); | |
548 | } | |
35f2fce9 | 549 | |
fd0f979a | 550 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
551 | } |
552 | ||
1f0d54cd MK |
553 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
554 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 555 | { |
d01a1e65 MK |
556 | lockdep_assert_held(&local->chanctx_mtx); |
557 | ||
c0166da9 | 558 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 559 | |
1f0d54cd MK |
560 | list_del_rcu(&ctx->list); |
561 | ieee80211_del_chanctx(local, ctx); | |
562 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
563 | } |
564 | ||
0fabfaaf AN |
565 | void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
566 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
567 | { |
568 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
569 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 570 | const struct cfg80211_chan_def *compat = NULL; |
0fabfaaf | 571 | struct sta_info *sta; |
e89a96f5 MK |
572 | |
573 | lockdep_assert_held(&local->chanctx_mtx); | |
574 | ||
575 | rcu_read_lock(); | |
576 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 577 | |
e89a96f5 MK |
578 | if (!ieee80211_sdata_running(sdata)) |
579 | continue; | |
580 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
581 | continue; | |
0e67c136 FF |
582 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
583 | continue; | |
e89a96f5 | 584 | |
4bf88530 JB |
585 | if (!compat) |
586 | compat = &sdata->vif.bss_conf.chandef; | |
587 | ||
588 | compat = cfg80211_chandef_compatible( | |
589 | &sdata->vif.bss_conf.chandef, compat); | |
a00f4f6e | 590 | if (WARN_ON_ONCE(!compat)) |
4bf88530 | 591 | break; |
e89a96f5 | 592 | } |
0fabfaaf AN |
593 | |
594 | /* TDLS peers can sometimes affect the chandef width */ | |
595 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
596 | if (!sta->uploaded || | |
597 | !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) || | |
598 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
599 | !sta->tdls_chandef.chan) | |
600 | continue; | |
601 | ||
602 | compat = cfg80211_chandef_compatible(&sta->tdls_chandef, | |
603 | compat); | |
604 | if (WARN_ON_ONCE(!compat)) | |
605 | break; | |
606 | } | |
e89a96f5 MK |
607 | rcu_read_unlock(); |
608 | ||
a00f4f6e | 609 | if (!compat) |
4bf88530 | 610 | return; |
e89a96f5 | 611 | |
18942d3b | 612 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
613 | } |
614 | ||
367bbd10 JB |
615 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
616 | struct ieee80211_chanctx *chanctx) | |
617 | { | |
618 | bool radar_enabled; | |
619 | ||
620 | lockdep_assert_held(&local->chanctx_mtx); | |
5cbc95a7 | 621 | /* for ieee80211_is_radar_required */ |
34a3740d | 622 | lockdep_assert_held(&local->mtx); |
367bbd10 | 623 | |
e7f2337a | 624 | radar_enabled = ieee80211_chanctx_radar_required(local, chanctx); |
367bbd10 JB |
625 | |
626 | if (radar_enabled == chanctx->conf.radar_enabled) | |
627 | return; | |
628 | ||
629 | chanctx->conf.radar_enabled = radar_enabled; | |
367bbd10 JB |
630 | |
631 | if (!local->use_chanctx) { | |
632 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
633 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
634 | } | |
635 | ||
636 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
637 | } | |
638 | ||
77eeba97 LC |
639 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
640 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 641 | { |
35f2fce9 | 642 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
643 | struct ieee80211_chanctx_conf *conf; |
644 | struct ieee80211_chanctx *curr_ctx = NULL; | |
645 | int ret = 0; | |
d01a1e65 | 646 | |
77eeba97 LC |
647 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
648 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 649 | |
77eeba97 LC |
650 | if (conf) { |
651 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 652 | |
77eeba97 LC |
653 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
654 | conf = NULL; | |
484298ad | 655 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 656 | } |
5bbe754d | 657 | |
77eeba97 LC |
658 | if (new_ctx) { |
659 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
660 | if (ret) | |
661 | goto out; | |
fd0f979a | 662 | |
77eeba97 | 663 | conf = &new_ctx->conf; |
484298ad MK |
664 | list_add(&sdata->assigned_chanctx_list, |
665 | &new_ctx->assigned_vifs); | |
77eeba97 | 666 | } |
e89a96f5 | 667 | |
77eeba97 LC |
668 | out: |
669 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 670 | |
77eeba97 LC |
671 | sdata->vif.bss_conf.idle = !conf; |
672 | ||
c0166da9 | 673 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
674 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
675 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
676 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
677 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 678 | } |
e89a96f5 | 679 | |
c0166da9 | 680 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
db82d8a9 | 681 | ieee80211_recalc_txpower(sdata, false); |
77eeba97 | 682 | ieee80211_recalc_chanctx_min_def(local, new_ctx); |
04ecd257 | 683 | } |
77eeba97 LC |
684 | |
685 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
686 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
687 | ieee80211_bss_info_change_notify(sdata, | |
688 | BSS_CHANGED_IDLE); | |
689 | ||
17c18bf8 JB |
690 | ieee80211_check_fast_xmit_iface(sdata); |
691 | ||
77eeba97 | 692 | return ret; |
d01a1e65 MK |
693 | } |
694 | ||
04ecd257 JB |
695 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
696 | struct ieee80211_chanctx *chanctx) | |
697 | { | |
698 | struct ieee80211_sub_if_data *sdata; | |
699 | u8 rx_chains_static, rx_chains_dynamic; | |
700 | ||
701 | lockdep_assert_held(&local->chanctx_mtx); | |
702 | ||
703 | rx_chains_static = 1; | |
704 | rx_chains_dynamic = 1; | |
705 | ||
706 | rcu_read_lock(); | |
707 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
708 | u8 needed_static, needed_dynamic; | |
709 | ||
710 | if (!ieee80211_sdata_running(sdata)) | |
711 | continue; | |
712 | ||
713 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
714 | &chanctx->conf) | |
715 | continue; | |
716 | ||
717 | switch (sdata->vif.type) { | |
718 | case NL80211_IFTYPE_P2P_DEVICE: | |
719 | continue; | |
720 | case NL80211_IFTYPE_STATION: | |
721 | if (!sdata->u.mgd.associated) | |
722 | continue; | |
723 | break; | |
724 | case NL80211_IFTYPE_AP_VLAN: | |
725 | continue; | |
726 | case NL80211_IFTYPE_AP: | |
727 | case NL80211_IFTYPE_ADHOC: | |
728 | case NL80211_IFTYPE_WDS: | |
729 | case NL80211_IFTYPE_MESH_POINT: | |
239281f8 | 730 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
731 | break; |
732 | default: | |
733 | WARN_ON_ONCE(1); | |
734 | } | |
735 | ||
736 | switch (sdata->smps_mode) { | |
737 | default: | |
738 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
739 | sdata->smps_mode); | |
740 | /* fall through */ | |
741 | case IEEE80211_SMPS_OFF: | |
742 | needed_static = sdata->needed_rx_chains; | |
743 | needed_dynamic = sdata->needed_rx_chains; | |
744 | break; | |
745 | case IEEE80211_SMPS_DYNAMIC: | |
746 | needed_static = 1; | |
747 | needed_dynamic = sdata->needed_rx_chains; | |
748 | break; | |
749 | case IEEE80211_SMPS_STATIC: | |
750 | needed_static = 1; | |
751 | needed_dynamic = 1; | |
752 | break; | |
753 | } | |
754 | ||
755 | rx_chains_static = max(rx_chains_static, needed_static); | |
756 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
757 | } | |
7b8a9cdd IY |
758 | |
759 | /* Disable SMPS for the monitor interface */ | |
760 | sdata = rcu_dereference(local->monitor_sdata); | |
761 | if (sdata && | |
762 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
763 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
764 | ||
04ecd257 JB |
765 | rcu_read_unlock(); |
766 | ||
767 | if (!local->use_chanctx) { | |
768 | if (rx_chains_static > 1) | |
769 | local->smps_mode = IEEE80211_SMPS_OFF; | |
770 | else if (rx_chains_dynamic > 1) | |
771 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
772 | else | |
773 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
774 | ieee80211_hw_config(local, 0); | |
775 | } | |
776 | ||
777 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
778 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
779 | return; | |
780 | ||
781 | chanctx->conf.rx_chains_static = rx_chains_static; | |
782 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
783 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
784 | } | |
785 | ||
11335a55 LC |
786 | static void |
787 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
788 | bool clear) | |
789 | { | |
33926eb7 | 790 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
791 | struct ieee80211_sub_if_data *vlan; |
792 | struct ieee80211_chanctx_conf *conf; | |
793 | ||
794 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
795 | return; | |
796 | ||
797 | lockdep_assert_held(&local->mtx); | |
798 | ||
799 | /* Check that conf exists, even when clearing this function | |
800 | * must be called with the AP's channel context still there | |
801 | * as it would otherwise cause VLANs to have an invalid | |
802 | * channel context pointer for a while, possibly pointing | |
803 | * to a channel context that has already been freed. | |
804 | */ | |
805 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 806 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
807 | WARN_ON(!conf); |
808 | ||
809 | if (clear) | |
810 | conf = NULL; | |
811 | ||
812 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
813 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
814 | } | |
815 | ||
816 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
817 | bool clear) | |
818 | { | |
819 | struct ieee80211_local *local = sdata->local; | |
820 | ||
821 | mutex_lock(&local->chanctx_mtx); | |
822 | ||
823 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
824 | ||
825 | mutex_unlock(&local->chanctx_mtx); | |
826 | } | |
827 | ||
828 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
829 | { | |
e3afb920 MK |
830 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
831 | ||
11335a55 LC |
832 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
833 | ||
e3afb920 | 834 | if (WARN_ON(!ctx)) |
73da7d5b SW |
835 | return -EINVAL; |
836 | ||
e3afb920 | 837 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
838 | sdata->reserved_chanctx = NULL; |
839 | ||
5bcae31d MK |
840 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
841 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
842 | if (WARN_ON(!ctx->replace_ctx)) | |
843 | return -EINVAL; | |
844 | ||
845 | WARN_ON(ctx->replace_ctx->replace_state != | |
846 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
847 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
848 | ||
849 | ctx->replace_ctx->replace_ctx = NULL; | |
850 | ctx->replace_ctx->replace_state = | |
851 | IEEE80211_CHANCTX_REPLACE_NONE; | |
852 | ||
853 | list_del_rcu(&ctx->list); | |
854 | kfree_rcu(ctx, rcu_head); | |
855 | } else { | |
856 | ieee80211_free_chanctx(sdata->local, ctx); | |
857 | } | |
858 | } | |
e3afb920 | 859 | |
11335a55 LC |
860 | return 0; |
861 | } | |
862 | ||
863 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
864 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
865 | enum ieee80211_chanctx_mode mode, |
866 | bool radar_required) | |
11335a55 LC |
867 | { |
868 | struct ieee80211_local *local = sdata->local; | |
5bcae31d | 869 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 870 | |
5bcae31d | 871 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 872 | |
5bcae31d MK |
873 | curr_ctx = ieee80211_vif_get_chanctx(sdata); |
874 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) | |
875 | return -ENOTSUPP; | |
11335a55 | 876 | |
13f348a8 | 877 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 878 | if (!new_ctx) { |
5bcae31d | 879 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 880 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
881 | if (IS_ERR(new_ctx)) |
882 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 883 | } else { |
5bcae31d MK |
884 | if (!curr_ctx || |
885 | (curr_ctx->replace_state == | |
886 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
887 | !list_empty(&curr_ctx->reserved_vifs)) { | |
888 | /* | |
889 | * Another vif already requested this context | |
890 | * for a reservation. Find another one hoping | |
891 | * all vifs assigned to it will also switch | |
892 | * soon enough. | |
893 | * | |
894 | * TODO: This needs a little more work as some | |
895 | * cases (more than 2 chanctx capable devices) | |
896 | * may fail which could otherwise succeed | |
897 | * provided some channel context juggling was | |
898 | * performed. | |
899 | * | |
900 | * Consider ctx1..3, vif1..6, each ctx has 2 | |
901 | * vifs. vif1 and vif2 from ctx1 request new | |
902 | * different chandefs starting 2 in-place | |
903 | * reserations with ctx4 and ctx5 replacing | |
904 | * ctx1 and ctx2 respectively. Next vif5 and | |
905 | * vif6 from ctx3 reserve ctx4. If vif3 and | |
906 | * vif4 remain on ctx2 as they are then this | |
907 | * fails unless `replace_ctx` from ctx5 is | |
908 | * replaced with ctx3. | |
909 | */ | |
910 | list_for_each_entry(ctx, &local->chanctx_list, | |
911 | list) { | |
912 | if (ctx->replace_state != | |
913 | IEEE80211_CHANCTX_REPLACE_NONE) | |
914 | continue; | |
915 | ||
916 | if (!list_empty(&ctx->reserved_vifs)) | |
917 | continue; | |
918 | ||
919 | curr_ctx = ctx; | |
920 | break; | |
921 | } | |
922 | } | |
923 | ||
924 | /* | |
925 | * If that's true then all available contexts already | |
926 | * have reservations and cannot be used. | |
927 | */ | |
928 | if (!curr_ctx || | |
929 | (curr_ctx->replace_state == | |
930 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
931 | !list_empty(&curr_ctx->reserved_vifs)) | |
932 | return -EBUSY; | |
933 | ||
934 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
935 | if (!new_ctx) | |
936 | return -ENOMEM; | |
937 | ||
938 | new_ctx->replace_ctx = curr_ctx; | |
939 | new_ctx->replace_state = | |
940 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
941 | ||
942 | curr_ctx->replace_ctx = new_ctx; | |
943 | curr_ctx->replace_state = | |
944 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
945 | ||
946 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
947 | } |
948 | } | |
949 | ||
e3afb920 | 950 | list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); |
11335a55 LC |
951 | sdata->reserved_chanctx = new_ctx; |
952 | sdata->reserved_chandef = *chandef; | |
09332481 | 953 | sdata->reserved_radar_required = radar_required; |
5bcae31d MK |
954 | sdata->reserved_ready = false; |
955 | ||
956 | return 0; | |
11335a55 LC |
957 | } |
958 | ||
03078de4 MK |
959 | static void |
960 | ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) | |
961 | { | |
962 | switch (sdata->vif.type) { | |
963 | case NL80211_IFTYPE_ADHOC: | |
964 | case NL80211_IFTYPE_AP: | |
965 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 966 | case NL80211_IFTYPE_OCB: |
03078de4 MK |
967 | ieee80211_queue_work(&sdata->local->hw, |
968 | &sdata->csa_finalize_work); | |
969 | break; | |
03078de4 | 970 | case NL80211_IFTYPE_STATION: |
4c3ebc56 MK |
971 | ieee80211_queue_work(&sdata->local->hw, |
972 | &sdata->u.mgd.chswitch_work); | |
973 | break; | |
974 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
975 | case NL80211_IFTYPE_AP_VLAN: |
976 | case NL80211_IFTYPE_WDS: | |
977 | case NL80211_IFTYPE_MONITOR: | |
978 | case NL80211_IFTYPE_P2P_CLIENT: | |
979 | case NL80211_IFTYPE_P2P_GO: | |
980 | case NL80211_IFTYPE_P2P_DEVICE: | |
981 | case NUM_NL80211_IFTYPES: | |
982 | WARN_ON(1); | |
983 | break; | |
984 | } | |
985 | } | |
986 | ||
2967e031 FF |
987 | static void |
988 | ieee80211_vif_update_chandef(struct ieee80211_sub_if_data *sdata, | |
989 | const struct cfg80211_chan_def *chandef) | |
990 | { | |
991 | struct ieee80211_sub_if_data *vlan; | |
992 | ||
993 | sdata->vif.bss_conf.chandef = *chandef; | |
994 | ||
995 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
996 | return; | |
997 | ||
998 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
999 | vlan->vif.bss_conf.chandef = *chandef; | |
1000 | } | |
1001 | ||
5bcae31d MK |
1002 | static int |
1003 | ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata) | |
11335a55 LC |
1004 | { |
1005 | struct ieee80211_local *local = sdata->local; | |
5bcae31d MK |
1006 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
1007 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1008 | const struct cfg80211_chan_def *chandef; | |
1009 | u32 changed = 0; | |
1010 | int err; | |
11335a55 LC |
1011 | |
1012 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 1013 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 1014 | |
5bcae31d MK |
1015 | new_ctx = sdata->reserved_chanctx; |
1016 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
11335a55 | 1017 | |
5bcae31d MK |
1018 | if (WARN_ON(!sdata->reserved_ready)) |
1019 | return -EBUSY; | |
73da7d5b | 1020 | |
5bcae31d MK |
1021 | if (WARN_ON(!new_ctx)) |
1022 | return -EINVAL; | |
1023 | ||
1024 | if (WARN_ON(!old_ctx)) | |
1025 | return -EINVAL; | |
1026 | ||
1027 | if (WARN_ON(new_ctx->replace_state == | |
1028 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1029 | return -EINVAL; | |
1030 | ||
1031 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1032 | &sdata->reserved_chandef); | |
1033 | if (WARN_ON(!chandef)) | |
1034 | return -EINVAL; | |
1035 | ||
bf45a242 AO |
1036 | ieee80211_change_chanctx(local, new_ctx, chandef); |
1037 | ||
5bcae31d MK |
1038 | vif_chsw[0].vif = &sdata->vif; |
1039 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1040 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
1041 | ||
1042 | list_del(&sdata->reserved_chanctx_list); | |
1043 | sdata->reserved_chanctx = NULL; | |
1044 | ||
1045 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1046 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1047 | if (err) { | |
1048 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1049 | ieee80211_free_chanctx(local, new_ctx); | |
1050 | ||
03078de4 | 1051 | goto out; |
73da7d5b SW |
1052 | } |
1053 | ||
5bcae31d MK |
1054 | list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs); |
1055 | rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf); | |
1056 | ||
1057 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1058 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1059 | ||
17c18bf8 JB |
1060 | ieee80211_check_fast_xmit_iface(sdata); |
1061 | ||
5bcae31d MK |
1062 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) |
1063 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1064 | |
11335a55 | 1065 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
5bcae31d | 1066 | changed = BSS_CHANGED_BANDWIDTH; |
11335a55 | 1067 | |
2967e031 | 1068 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
11335a55 | 1069 | |
722ddb0d EG |
1070 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1071 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
1072 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
1073 | ||
5bcae31d MK |
1074 | if (changed) |
1075 | ieee80211_bss_info_change_notify(sdata, changed); | |
1076 | ||
03078de4 MK |
1077 | out: |
1078 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1079 | return err; |
1080 | } | |
1081 | ||
1082 | static int | |
1083 | ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata) | |
1084 | { | |
1085 | struct ieee80211_local *local = sdata->local; | |
1086 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1087 | const struct cfg80211_chan_def *chandef; | |
1088 | int err; | |
1089 | ||
1090 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1091 | new_ctx = sdata->reserved_chanctx; | |
1092 | ||
1093 | if (WARN_ON(!sdata->reserved_ready)) | |
1094 | return -EINVAL; | |
1095 | ||
1096 | if (WARN_ON(old_ctx)) | |
1097 | return -EINVAL; | |
1098 | ||
1099 | if (WARN_ON(!new_ctx)) | |
1100 | return -EINVAL; | |
1101 | ||
1102 | if (WARN_ON(new_ctx->replace_state == | |
1103 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1104 | return -EINVAL; | |
1105 | ||
1106 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1107 | &sdata->reserved_chandef); | |
1108 | if (WARN_ON(!chandef)) | |
1109 | return -EINVAL; | |
1110 | ||
bf45a242 AO |
1111 | ieee80211_change_chanctx(local, new_ctx, chandef); |
1112 | ||
e3afb920 | 1113 | list_del(&sdata->reserved_chanctx_list); |
5bcae31d | 1114 | sdata->reserved_chanctx = NULL; |
11335a55 | 1115 | |
5bcae31d MK |
1116 | err = ieee80211_assign_vif_chanctx(sdata, new_ctx); |
1117 | if (err) { | |
1118 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1119 | ieee80211_free_chanctx(local, new_ctx); | |
1120 | ||
1121 | goto out; | |
1122 | } | |
1123 | ||
1124 | out: | |
03078de4 | 1125 | ieee80211_vif_chanctx_reservation_complete(sdata); |
5bcae31d MK |
1126 | return err; |
1127 | } | |
1128 | ||
1129 | static bool | |
1130 | ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata) | |
1131 | { | |
1132 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1133 | ||
1134 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1135 | ||
1136 | new_ctx = sdata->reserved_chanctx; | |
1137 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1138 | ||
1139 | if (!old_ctx) | |
1140 | return false; | |
1141 | ||
1142 | if (WARN_ON(!new_ctx)) | |
1143 | return false; | |
1144 | ||
1145 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1146 | return false; | |
1147 | ||
1148 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1149 | return false; | |
1150 | ||
1151 | return true; | |
1152 | } | |
1153 | ||
1154 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1155 | struct ieee80211_chanctx *new_ctx) | |
1156 | { | |
1157 | const struct cfg80211_chan_def *chandef; | |
1158 | ||
1159 | lockdep_assert_held(&local->mtx); | |
1160 | lockdep_assert_held(&local->chanctx_mtx); | |
1161 | ||
1162 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1163 | if (WARN_ON(!chandef)) | |
1164 | return -EINVAL; | |
1165 | ||
1166 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1167 | local->_oper_chandef = *chandef; | |
1168 | ieee80211_hw_config(local, 0); | |
1169 | ||
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1174 | int n_vifs) | |
1175 | { | |
1176 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
1177 | struct ieee80211_sub_if_data *sdata; | |
1178 | struct ieee80211_chanctx *ctx, *old_ctx; | |
1179 | int i, err; | |
1180 | ||
1181 | lockdep_assert_held(&local->mtx); | |
1182 | lockdep_assert_held(&local->chanctx_mtx); | |
1183 | ||
1184 | vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL); | |
1185 | if (!vif_chsw) | |
1186 | return -ENOMEM; | |
1187 | ||
1188 | i = 0; | |
1189 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1190 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1191 | continue; | |
1192 | ||
1193 | if (WARN_ON(!ctx->replace_ctx)) { | |
1194 | err = -EINVAL; | |
5d52ee81 LC |
1195 | goto out; |
1196 | } | |
11335a55 | 1197 | |
5bcae31d MK |
1198 | list_for_each_entry(sdata, &ctx->reserved_vifs, |
1199 | reserved_chanctx_list) { | |
1200 | if (!ieee80211_vif_has_in_place_reservation( | |
1201 | sdata)) | |
1202 | continue; | |
1203 | ||
1204 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1205 | vif_chsw[i].vif = &sdata->vif; | |
1206 | vif_chsw[i].old_ctx = &old_ctx->conf; | |
1207 | vif_chsw[i].new_ctx = &ctx->conf; | |
1208 | ||
1209 | i++; | |
1210 | } | |
5d52ee81 | 1211 | } |
11335a55 | 1212 | |
5bcae31d MK |
1213 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1214 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1215 | |
11335a55 | 1216 | out: |
5bcae31d MK |
1217 | kfree(vif_chsw); |
1218 | return err; | |
1219 | } | |
1220 | ||
1221 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1222 | { | |
1223 | struct ieee80211_chanctx *ctx; | |
1224 | int err; | |
1225 | ||
1226 | lockdep_assert_held(&local->mtx); | |
1227 | lockdep_assert_held(&local->chanctx_mtx); | |
1228 | ||
1229 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1230 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1231 | continue; | |
1232 | ||
1233 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1234 | continue; | |
1235 | ||
1236 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1237 | err = ieee80211_add_chanctx(local, ctx); | |
1238 | if (err) | |
1239 | goto err; | |
1240 | } | |
1241 | ||
1242 | return 0; | |
1243 | ||
1244 | err: | |
1245 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1246 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1247 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1248 | continue; | |
1249 | ||
1250 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1251 | continue; | |
1252 | ||
1253 | ieee80211_del_chanctx(local, ctx); | |
1254 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1255 | } | |
1256 | ||
1257 | return err; | |
1258 | } | |
1259 | ||
649b2a4d | 1260 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d MK |
1261 | { |
1262 | struct ieee80211_sub_if_data *sdata, *sdata_tmp; | |
1263 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; | |
1264 | struct ieee80211_chanctx *new_ctx = NULL; | |
1265 | int i, err, n_assigned, n_reserved, n_ready; | |
1266 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; | |
1267 | ||
1268 | lockdep_assert_held(&local->mtx); | |
1269 | lockdep_assert_held(&local->chanctx_mtx); | |
1270 | ||
1271 | /* | |
1272 | * If there are 2 independent pairs of channel contexts performing | |
1273 | * cross-switch of their vifs this code will still wait until both are | |
1274 | * ready even though it could be possible to switch one before the | |
1275 | * other is ready. | |
1276 | * | |
1277 | * For practical reasons and code simplicity just do a single huge | |
1278 | * switch. | |
1279 | */ | |
1280 | ||
1281 | /* | |
1282 | * Verify if the reservation is still feasible. | |
1283 | * - if it's not then disconnect | |
1284 | * - if it is but not all vifs necessary are ready then defer | |
1285 | */ | |
1286 | ||
1287 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1288 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1289 | continue; | |
1290 | ||
1291 | if (WARN_ON(!ctx->replace_ctx)) { | |
1292 | err = -EINVAL; | |
1293 | goto err; | |
1294 | } | |
1295 | ||
1296 | if (!local->use_chanctx) | |
1297 | new_ctx = ctx; | |
1298 | ||
1299 | n_ctx++; | |
1300 | ||
1301 | n_assigned = 0; | |
1302 | n_reserved = 0; | |
1303 | n_ready = 0; | |
1304 | ||
1305 | list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs, | |
1306 | assigned_chanctx_list) { | |
1307 | n_assigned++; | |
1308 | if (sdata->reserved_chanctx) { | |
1309 | n_reserved++; | |
1310 | if (sdata->reserved_ready) | |
1311 | n_ready++; | |
1312 | } | |
1313 | } | |
1314 | ||
1315 | if (n_assigned != n_reserved) { | |
1316 | if (n_ready == n_reserved) { | |
1317 | wiphy_info(local->hw.wiphy, | |
1318 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1319 | err = -EBUSY; | |
1320 | goto err; | |
1321 | } | |
1322 | ||
1323 | return -EAGAIN; | |
1324 | } | |
1325 | ||
1326 | ctx->conf.radar_enabled = false; | |
1327 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1328 | reserved_chanctx_list) { | |
1329 | if (ieee80211_vif_has_in_place_reservation(sdata) && | |
1330 | !sdata->reserved_ready) | |
1331 | return -EAGAIN; | |
1332 | ||
1333 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1334 | if (old_ctx) { | |
1335 | if (old_ctx->replace_state == | |
1336 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1337 | n_vifs_switch++; | |
1338 | else | |
1339 | n_vifs_assign++; | |
1340 | } else { | |
1341 | n_vifs_ctxless++; | |
1342 | } | |
1343 | ||
1344 | if (sdata->reserved_radar_required) | |
1345 | ctx->conf.radar_enabled = true; | |
1346 | } | |
1347 | } | |
1348 | ||
1349 | if (WARN_ON(n_ctx == 0) || | |
1350 | WARN_ON(n_vifs_switch == 0 && | |
1351 | n_vifs_assign == 0 && | |
1352 | n_vifs_ctxless == 0) || | |
1353 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1354 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1355 | err = -EINVAL; | |
1356 | goto err; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * All necessary vifs are ready. Perform the switch now depending on | |
1361 | * reservations and driver capabilities. | |
1362 | */ | |
1363 | ||
1364 | if (local->use_chanctx) { | |
1365 | if (n_vifs_switch > 0) { | |
1366 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1367 | if (err) | |
1368 | goto err; | |
1369 | } | |
1370 | ||
1371 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1372 | err = ieee80211_chsw_switch_ctxs(local); | |
1373 | if (err) | |
1374 | goto err; | |
1375 | } | |
1376 | } else { | |
1377 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1378 | if (err) | |
1379 | goto err; | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Update all structures, values and pointers to point to new channel | |
1384 | * context(s). | |
1385 | */ | |
1386 | ||
1387 | i = 0; | |
1388 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1389 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1390 | continue; | |
1391 | ||
1392 | if (WARN_ON(!ctx->replace_ctx)) { | |
1393 | err = -EINVAL; | |
1394 | goto err; | |
1395 | } | |
1396 | ||
1397 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1398 | reserved_chanctx_list) { | |
1399 | u32 changed = 0; | |
1400 | ||
1401 | if (!ieee80211_vif_has_in_place_reservation(sdata)) | |
1402 | continue; | |
1403 | ||
1404 | rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); | |
1405 | ||
1406 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1407 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, | |
1408 | false); | |
1409 | ||
17c18bf8 JB |
1410 | ieee80211_check_fast_xmit_iface(sdata); |
1411 | ||
5bcae31d MK |
1412 | sdata->radar_required = sdata->reserved_radar_required; |
1413 | ||
1414 | if (sdata->vif.bss_conf.chandef.width != | |
1415 | sdata->reserved_chandef.width) | |
1416 | changed = BSS_CHANGED_BANDWIDTH; | |
1417 | ||
2967e031 | 1418 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
5bcae31d MK |
1419 | if (changed) |
1420 | ieee80211_bss_info_change_notify(sdata, | |
1421 | changed); | |
1422 | ||
db82d8a9 | 1423 | ieee80211_recalc_txpower(sdata, false); |
5bcae31d MK |
1424 | } |
1425 | ||
1426 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1427 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1428 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1429 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1430 | ||
1431 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1432 | reserved_chanctx_list) { | |
1433 | if (ieee80211_vif_get_chanctx(sdata) != ctx) | |
1434 | continue; | |
1435 | ||
1436 | list_del(&sdata->reserved_chanctx_list); | |
1437 | list_move(&sdata->assigned_chanctx_list, | |
47e4df94 | 1438 | &ctx->assigned_vifs); |
5bcae31d | 1439 | sdata->reserved_chanctx = NULL; |
03078de4 MK |
1440 | |
1441 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1442 | } |
1443 | ||
1444 | /* | |
1445 | * This context might have been a dependency for an already | |
1446 | * ready re-assign reservation interface that was deferred. Do | |
1447 | * not propagate error to the caller though. The in-place | |
1448 | * reservation for originally requested interface has already | |
1449 | * succeeded at this point. | |
1450 | */ | |
1451 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1452 | reserved_chanctx_list) { | |
1453 | if (WARN_ON(ieee80211_vif_has_in_place_reservation( | |
1454 | sdata))) | |
1455 | continue; | |
1456 | ||
1457 | if (WARN_ON(sdata->reserved_chanctx != ctx)) | |
1458 | continue; | |
1459 | ||
1460 | if (!sdata->reserved_ready) | |
1461 | continue; | |
1462 | ||
1463 | if (ieee80211_vif_get_chanctx(sdata)) | |
1464 | err = ieee80211_vif_use_reserved_reassign( | |
1465 | sdata); | |
1466 | else | |
1467 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1468 | ||
1469 | if (err) { | |
1470 | sdata_info(sdata, | |
1471 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1472 | err); | |
1473 | ieee80211_vif_unreserve_chanctx(sdata); | |
1474 | cfg80211_stop_iface(local->hw.wiphy, | |
1475 | &sdata->wdev, | |
1476 | GFP_KERNEL); | |
1477 | } | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | * Finally free old contexts | |
1483 | */ | |
1484 | ||
1485 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1486 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1487 | continue; | |
1488 | ||
1489 | ctx->replace_ctx->replace_ctx = NULL; | |
1490 | ctx->replace_ctx->replace_state = | |
1491 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1492 | ||
1493 | list_del_rcu(&ctx->list); | |
1494 | kfree_rcu(ctx, rcu_head); | |
1495 | } | |
1496 | ||
1497 | return 0; | |
1498 | ||
1499 | err: | |
1500 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1501 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1502 | continue; | |
1503 | ||
1504 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
03078de4 | 1505 | reserved_chanctx_list) { |
5bcae31d | 1506 | ieee80211_vif_unreserve_chanctx(sdata); |
03078de4 MK |
1507 | ieee80211_vif_chanctx_reservation_complete(sdata); |
1508 | } | |
5bcae31d MK |
1509 | } |
1510 | ||
1511 | return err; | |
1512 | } | |
1513 | ||
649b2a4d JB |
1514 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1515 | { | |
1516 | struct ieee80211_local *local = sdata->local; | |
1517 | struct ieee80211_chanctx_conf *conf; | |
1518 | struct ieee80211_chanctx *ctx; | |
1519 | bool use_reserved_switch = false; | |
1520 | ||
1521 | lockdep_assert_held(&local->chanctx_mtx); | |
1522 | ||
1523 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1524 | lockdep_is_held(&local->chanctx_mtx)); | |
1525 | if (!conf) | |
1526 | return; | |
1527 | ||
1528 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1529 | ||
1530 | if (sdata->reserved_chanctx) { | |
1531 | if (sdata->reserved_chanctx->replace_state == | |
1532 | IEEE80211_CHANCTX_REPLACES_OTHER && | |
1533 | ieee80211_chanctx_num_reserved(local, | |
1534 | sdata->reserved_chanctx) > 1) | |
1535 | use_reserved_switch = true; | |
1536 | ||
1537 | ieee80211_vif_unreserve_chanctx(sdata); | |
1538 | } | |
1539 | ||
1540 | ieee80211_assign_vif_chanctx(sdata, NULL); | |
1541 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1542 | ieee80211_free_chanctx(local, ctx); | |
1543 | ||
104f5a62 EP |
1544 | sdata->radar_required = false; |
1545 | ||
649b2a4d JB |
1546 | /* Unreserving may ready an in-place reservation. */ |
1547 | if (use_reserved_switch) | |
1548 | ieee80211_vif_use_reserved_switch(local); | |
1549 | } | |
1550 | ||
1551 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, | |
1552 | const struct cfg80211_chan_def *chandef, | |
1553 | enum ieee80211_chanctx_mode mode) | |
1554 | { | |
1555 | struct ieee80211_local *local = sdata->local; | |
1556 | struct ieee80211_chanctx *ctx; | |
1557 | u8 radar_detect_width = 0; | |
1558 | int ret; | |
1559 | ||
1560 | lockdep_assert_held(&local->mtx); | |
1561 | ||
1562 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); | |
1563 | ||
1564 | mutex_lock(&local->chanctx_mtx); | |
1565 | ||
1566 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1567 | chandef, | |
1568 | sdata->wdev.iftype); | |
1569 | if (ret < 0) | |
1570 | goto out; | |
1571 | if (ret > 0) | |
1572 | radar_detect_width = BIT(chandef->width); | |
1573 | ||
1574 | sdata->radar_required = ret; | |
1575 | ||
1576 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1577 | radar_detect_width); | |
1578 | if (ret < 0) | |
1579 | goto out; | |
1580 | ||
1581 | __ieee80211_vif_release_channel(sdata); | |
1582 | ||
1583 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1584 | if (!ctx) | |
1585 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1586 | if (IS_ERR(ctx)) { | |
1587 | ret = PTR_ERR(ctx); | |
1588 | goto out; | |
1589 | } | |
1590 | ||
2967e031 | 1591 | ieee80211_vif_update_chandef(sdata, chandef); |
649b2a4d JB |
1592 | |
1593 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); | |
1594 | if (ret) { | |
1595 | /* if assign fails refcount stays the same */ | |
1596 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1597 | ieee80211_free_chanctx(local, ctx); | |
1598 | goto out; | |
1599 | } | |
1600 | ||
1601 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1602 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1603 | out: | |
104f5a62 EP |
1604 | if (ret) |
1605 | sdata->radar_required = false; | |
1606 | ||
649b2a4d JB |
1607 | mutex_unlock(&local->chanctx_mtx); |
1608 | return ret; | |
1609 | } | |
1610 | ||
5bcae31d MK |
1611 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata) |
1612 | { | |
1613 | struct ieee80211_local *local = sdata->local; | |
1614 | struct ieee80211_chanctx *new_ctx; | |
1615 | struct ieee80211_chanctx *old_ctx; | |
1616 | int err; | |
1617 | ||
1618 | lockdep_assert_held(&local->mtx); | |
1619 | lockdep_assert_held(&local->chanctx_mtx); | |
1620 | ||
1621 | new_ctx = sdata->reserved_chanctx; | |
1622 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1623 | ||
1624 | if (WARN_ON(!new_ctx)) | |
1625 | return -EINVAL; | |
1626 | ||
1627 | if (WARN_ON(new_ctx->replace_state == | |
1628 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1629 | return -EINVAL; | |
1630 | ||
1631 | if (WARN_ON(sdata->reserved_ready)) | |
1632 | return -EINVAL; | |
1633 | ||
1634 | sdata->reserved_ready = true; | |
1635 | ||
1636 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1637 | if (old_ctx) | |
1638 | err = ieee80211_vif_use_reserved_reassign(sdata); | |
1639 | else | |
1640 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1641 | ||
1642 | if (err) | |
1643 | return err; | |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | * In-place reservation may need to be finalized now either if: | |
1648 | * a) sdata is taking part in the swapping itself and is the last one | |
1649 | * b) sdata has switched with a re-assign reservation to an existing | |
1650 | * context readying in-place switching of old_ctx | |
1651 | * | |
1652 | * In case of (b) do not propagate the error up because the requested | |
1653 | * sdata already switched successfully. Just spill an extra warning. | |
1654 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1655 | * interfaces upon failure. | |
1656 | */ | |
1657 | if ((old_ctx && | |
1658 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1659 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1660 | err = ieee80211_vif_use_reserved_switch(local); | |
1661 | if (err && err != -EAGAIN) { | |
1662 | if (new_ctx->replace_state == | |
1663 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1664 | return err; | |
1665 | ||
1666 | wiphy_info(local->hw.wiphy, | |
1667 | "depending in-place reservation failed (err=%d)\n", | |
1668 | err); | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | return 0; | |
73da7d5b SW |
1673 | } |
1674 | ||
2c9b7359 JB |
1675 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1676 | const struct cfg80211_chan_def *chandef, | |
1677 | u32 *changed) | |
1678 | { | |
1679 | struct ieee80211_local *local = sdata->local; | |
1680 | struct ieee80211_chanctx_conf *conf; | |
1681 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1682 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1683 | int ret; |
1684 | ||
1685 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1686 | IEEE80211_CHAN_DISABLED)) | |
1687 | return -EINVAL; | |
1688 | ||
1689 | mutex_lock(&local->chanctx_mtx); | |
1690 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1691 | ret = 0; | |
1692 | goto out; | |
1693 | } | |
1694 | ||
1695 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1696 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1697 | ret = -EINVAL; | |
1698 | goto out; | |
1699 | } | |
1700 | ||
1701 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1702 | lockdep_is_held(&local->chanctx_mtx)); | |
1703 | if (!conf) { | |
1704 | ret = -EINVAL; | |
1705 | goto out; | |
1706 | } | |
1707 | ||
1708 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1709 | |
1710 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1711 | if (!compat) { | |
2c9b7359 JB |
1712 | ret = -EINVAL; |
1713 | goto out; | |
1714 | } | |
1715 | ||
5bcae31d MK |
1716 | switch (ctx->replace_state) { |
1717 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1718 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1719 | ret = -EBUSY; | |
1720 | goto out; | |
1721 | } | |
1722 | break; | |
1723 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1724 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1725 | * reservation itself? */ |
1726 | ret = -EBUSY; | |
1727 | goto out; | |
1728 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1729 | /* channel context that is going to replace another channel | |
1730 | * context doesn't really exist and shouldn't be assigned | |
1731 | * anywhere yet */ | |
1732 | WARN_ON(1); | |
1733 | break; | |
1734 | } | |
1735 | ||
2967e031 | 1736 | ieee80211_vif_update_chandef(sdata, chandef); |
2c9b7359 JB |
1737 | |
1738 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1739 | ||
1740 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1741 | ret = 0; | |
1742 | out: | |
1743 | mutex_unlock(&local->chanctx_mtx); | |
1744 | return ret; | |
1745 | } | |
1746 | ||
d01a1e65 MK |
1747 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1748 | { | |
55de908a JB |
1749 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1750 | ||
34a3740d JB |
1751 | lockdep_assert_held(&sdata->local->mtx); |
1752 | ||
d01a1e65 MK |
1753 | mutex_lock(&sdata->local->chanctx_mtx); |
1754 | __ieee80211_vif_release_channel(sdata); | |
1755 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1756 | } | |
3448c005 | 1757 | |
4d76d21b JB |
1758 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1759 | { | |
1760 | struct ieee80211_local *local = sdata->local; | |
1761 | struct ieee80211_sub_if_data *ap; | |
1762 | struct ieee80211_chanctx_conf *conf; | |
1763 | ||
1764 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1765 | return; | |
1766 | ||
1767 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1768 | ||
1769 | mutex_lock(&local->chanctx_mtx); | |
1770 | ||
1771 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1772 | lockdep_is_held(&local->chanctx_mtx)); | |
1773 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1774 | mutex_unlock(&local->chanctx_mtx); | |
1775 | } | |
1776 | ||
3448c005 JB |
1777 | void ieee80211_iter_chan_contexts_atomic( |
1778 | struct ieee80211_hw *hw, | |
1779 | void (*iter)(struct ieee80211_hw *hw, | |
1780 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1781 | void *data), | |
1782 | void *iter_data) | |
1783 | { | |
1784 | struct ieee80211_local *local = hw_to_local(hw); | |
1785 | struct ieee80211_chanctx *ctx; | |
1786 | ||
1787 | rcu_read_lock(); | |
1788 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1789 | if (ctx->driver_present) |
1790 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1791 | rcu_read_unlock(); |
1792 | } | |
1793 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |