Commit | Line | Data |
---|---|---|
f444de05 JB |
1 | /* |
2 | * mac80211 - channel management | |
3 | */ | |
4 | ||
0aaffa9b | 5 | #include <linux/nl80211.h> |
3448c005 | 6 | #include <linux/export.h> |
4d76d21b | 7 | #include <linux/rtnetlink.h> |
3117bbdb | 8 | #include <net/cfg80211.h> |
f444de05 | 9 | #include "ieee80211_i.h" |
35f2fce9 | 10 | #include "driver-ops.h" |
f444de05 | 11 | |
c0166da9 MK |
12 | static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local, |
13 | struct ieee80211_chanctx *ctx) | |
14 | { | |
15 | struct ieee80211_sub_if_data *sdata; | |
16 | int num = 0; | |
17 | ||
18 | lockdep_assert_held(&local->chanctx_mtx); | |
19 | ||
20 | list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) | |
21 | num++; | |
22 | ||
23 | return num; | |
24 | } | |
25 | ||
26 | static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local, | |
27 | struct ieee80211_chanctx *ctx) | |
28 | { | |
29 | struct ieee80211_sub_if_data *sdata; | |
30 | int num = 0; | |
31 | ||
32 | lockdep_assert_held(&local->chanctx_mtx); | |
33 | ||
34 | list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) | |
35 | num++; | |
36 | ||
37 | return num; | |
38 | } | |
39 | ||
40 | int ieee80211_chanctx_refcount(struct ieee80211_local *local, | |
41 | struct ieee80211_chanctx *ctx) | |
42 | { | |
43 | return ieee80211_chanctx_num_assigned(local, ctx) + | |
44 | ieee80211_chanctx_num_reserved(local, ctx); | |
45 | } | |
46 | ||
c2b90ad8 MK |
47 | static int ieee80211_num_chanctx(struct ieee80211_local *local) |
48 | { | |
49 | struct ieee80211_chanctx *ctx; | |
50 | int num = 0; | |
51 | ||
52 | lockdep_assert_held(&local->chanctx_mtx); | |
53 | ||
54 | list_for_each_entry(ctx, &local->chanctx_list, list) | |
55 | num++; | |
56 | ||
57 | return num; | |
58 | } | |
59 | ||
60 | static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local) | |
61 | { | |
62 | lockdep_assert_held(&local->chanctx_mtx); | |
63 | return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local); | |
64 | } | |
65 | ||
5bcae31d MK |
66 | static struct ieee80211_chanctx * |
67 | ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata) | |
68 | { | |
1d4cc30c | 69 | struct ieee80211_local *local __maybe_unused = sdata->local; |
5bcae31d MK |
70 | struct ieee80211_chanctx_conf *conf; |
71 | ||
72 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
73 | lockdep_is_held(&local->chanctx_mtx)); | |
74 | if (!conf) | |
75 | return NULL; | |
76 | ||
77 | return container_of(conf, struct ieee80211_chanctx, conf); | |
78 | } | |
79 | ||
0288157b MK |
80 | static const struct cfg80211_chan_def * |
81 | ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, | |
82 | struct ieee80211_chanctx *ctx, | |
83 | const struct cfg80211_chan_def *compat) | |
84 | { | |
85 | struct ieee80211_sub_if_data *sdata; | |
86 | ||
87 | lockdep_assert_held(&local->chanctx_mtx); | |
88 | ||
89 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
90 | reserved_chanctx_list) { | |
91 | if (!compat) | |
92 | compat = &sdata->reserved_chandef; | |
93 | ||
94 | compat = cfg80211_chandef_compatible(&sdata->reserved_chandef, | |
95 | compat); | |
96 | if (!compat) | |
97 | break; | |
98 | } | |
99 | ||
100 | return compat; | |
101 | } | |
102 | ||
13f348a8 MK |
103 | static const struct cfg80211_chan_def * |
104 | ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, | |
105 | struct ieee80211_chanctx *ctx, | |
106 | const struct cfg80211_chan_def *compat) | |
107 | { | |
108 | struct ieee80211_sub_if_data *sdata; | |
109 | ||
110 | lockdep_assert_held(&local->chanctx_mtx); | |
111 | ||
112 | list_for_each_entry(sdata, &ctx->assigned_vifs, | |
113 | assigned_chanctx_list) { | |
114 | if (sdata->reserved_chanctx != NULL) | |
115 | continue; | |
116 | ||
117 | if (!compat) | |
118 | compat = &sdata->vif.bss_conf.chandef; | |
119 | ||
120 | compat = cfg80211_chandef_compatible( | |
121 | &sdata->vif.bss_conf.chandef, compat); | |
122 | if (!compat) | |
123 | break; | |
124 | } | |
125 | ||
126 | return compat; | |
127 | } | |
128 | ||
129 | static const struct cfg80211_chan_def * | |
130 | ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, | |
131 | struct ieee80211_chanctx *ctx, | |
132 | const struct cfg80211_chan_def *compat) | |
133 | { | |
134 | lockdep_assert_held(&local->chanctx_mtx); | |
135 | ||
136 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); | |
137 | if (!compat) | |
138 | return NULL; | |
139 | ||
140 | compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); | |
141 | if (!compat) | |
142 | return NULL; | |
143 | ||
144 | return compat; | |
145 | } | |
146 | ||
147 | static bool | |
148 | ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, | |
149 | struct ieee80211_chanctx *ctx, | |
150 | const struct cfg80211_chan_def *def) | |
151 | { | |
152 | lockdep_assert_held(&local->chanctx_mtx); | |
153 | ||
154 | if (ieee80211_chanctx_combined_chandef(local, ctx, def)) | |
155 | return true; | |
156 | ||
157 | if (!list_empty(&ctx->reserved_vifs) && | |
158 | ieee80211_chanctx_reserved_chandef(local, ctx, def)) | |
159 | return true; | |
160 | ||
161 | return false; | |
162 | } | |
163 | ||
164 | static struct ieee80211_chanctx * | |
165 | ieee80211_find_reservation_chanctx(struct ieee80211_local *local, | |
166 | const struct cfg80211_chan_def *chandef, | |
167 | enum ieee80211_chanctx_mode mode) | |
168 | { | |
169 | struct ieee80211_chanctx *ctx; | |
170 | ||
171 | lockdep_assert_held(&local->chanctx_mtx); | |
172 | ||
173 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
174 | return NULL; | |
175 | ||
176 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
5bcae31d MK |
177 | if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) |
178 | continue; | |
179 | ||
13f348a8 MK |
180 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
181 | continue; | |
182 | ||
183 | if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, | |
184 | chandef)) | |
185 | continue; | |
186 | ||
187 | return ctx; | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
21f659bf EP |
193 | static enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) |
194 | { | |
195 | switch (sta->bandwidth) { | |
196 | case IEEE80211_STA_RX_BW_20: | |
197 | if (sta->ht_cap.ht_supported) | |
198 | return NL80211_CHAN_WIDTH_20; | |
199 | else | |
200 | return NL80211_CHAN_WIDTH_20_NOHT; | |
201 | case IEEE80211_STA_RX_BW_40: | |
202 | return NL80211_CHAN_WIDTH_40; | |
203 | case IEEE80211_STA_RX_BW_80: | |
204 | return NL80211_CHAN_WIDTH_80; | |
205 | case IEEE80211_STA_RX_BW_160: | |
206 | /* | |
207 | * This applied for both 160 and 80+80. since we use | |
208 | * the returned value to consider degradation of | |
209 | * ctx->conf.min_def, we have to make sure to take | |
210 | * the bigger one (NL80211_CHAN_WIDTH_160). | |
211 | * Otherwise we might try degrading even when not | |
212 | * needed, as the max required sta_bw returned (80+80) | |
213 | * might be smaller than the configured bw (160). | |
214 | */ | |
215 | return NL80211_CHAN_WIDTH_160; | |
216 | default: | |
217 | WARN_ON(1); | |
218 | return NL80211_CHAN_WIDTH_20; | |
219 | } | |
220 | } | |
221 | ||
222 | static enum nl80211_chan_width | |
223 | ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata) | |
224 | { | |
225 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
226 | struct sta_info *sta; | |
227 | ||
228 | rcu_read_lock(); | |
229 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
230 | if (sdata != sta->sdata && | |
231 | !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) | |
232 | continue; | |
233 | ||
234 | if (!sta->uploaded) | |
235 | continue; | |
236 | ||
237 | max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); | |
238 | } | |
239 | rcu_read_unlock(); | |
240 | ||
241 | return max_bw; | |
242 | } | |
243 | ||
244 | static enum nl80211_chan_width | |
245 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
246 | struct ieee80211_chanctx_conf *conf) | |
247 | { | |
248 | struct ieee80211_sub_if_data *sdata; | |
249 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
250 | ||
251 | rcu_read_lock(); | |
252 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
253 | struct ieee80211_vif *vif = &sdata->vif; | |
254 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; | |
255 | ||
256 | if (!ieee80211_sdata_running(sdata)) | |
257 | continue; | |
258 | ||
259 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
260 | continue; | |
261 | ||
262 | switch (vif->type) { | |
263 | case NL80211_IFTYPE_AP: | |
264 | case NL80211_IFTYPE_AP_VLAN: | |
265 | width = ieee80211_get_max_required_bw(sdata); | |
266 | break; | |
267 | case NL80211_IFTYPE_P2P_DEVICE: | |
268 | continue; | |
269 | case NL80211_IFTYPE_STATION: | |
270 | case NL80211_IFTYPE_ADHOC: | |
271 | case NL80211_IFTYPE_WDS: | |
272 | case NL80211_IFTYPE_MESH_POINT: | |
273 | width = vif->bss_conf.chandef.width; | |
274 | break; | |
275 | case NL80211_IFTYPE_UNSPECIFIED: | |
276 | case NUM_NL80211_IFTYPES: | |
277 | case NL80211_IFTYPE_MONITOR: | |
278 | case NL80211_IFTYPE_P2P_CLIENT: | |
279 | case NL80211_IFTYPE_P2P_GO: | |
280 | WARN_ON_ONCE(1); | |
281 | } | |
282 | max_bw = max(max_bw, width); | |
283 | } | |
1c37a72c EP |
284 | |
285 | /* use the configured bandwidth in case of monitor interface */ | |
286 | sdata = rcu_dereference(local->monitor_sdata); | |
287 | if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf) | |
288 | max_bw = max(max_bw, conf->def.width); | |
289 | ||
21f659bf EP |
290 | rcu_read_unlock(); |
291 | ||
292 | return max_bw; | |
293 | } | |
294 | ||
295 | /* | |
296 | * recalc the min required chan width of the channel context, which is | |
297 | * the max of min required widths of all the interfaces bound to this | |
298 | * channel context. | |
299 | */ | |
300 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
301 | struct ieee80211_chanctx *ctx) | |
302 | { | |
303 | enum nl80211_chan_width max_bw; | |
304 | struct cfg80211_chan_def min_def; | |
305 | ||
306 | lockdep_assert_held(&local->chanctx_mtx); | |
307 | ||
308 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
309 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || | |
310 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
311 | ctx->conf.radar_enabled) { | |
312 | ctx->conf.min_def = ctx->conf.def; | |
313 | return; | |
314 | } | |
315 | ||
316 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
317 | ||
318 | /* downgrade chandef up to max_bw */ | |
319 | min_def = ctx->conf.def; | |
320 | while (min_def.width > max_bw) | |
321 | ieee80211_chandef_downgrade(&min_def); | |
322 | ||
323 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
324 | return; | |
325 | ||
326 | ctx->conf.min_def = min_def; | |
327 | if (!ctx->driver_present) | |
328 | return; | |
329 | ||
330 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH); | |
331 | } | |
332 | ||
18942d3b | 333 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
334 | struct ieee80211_chanctx *ctx, |
335 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 336 | { |
4bf88530 | 337 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) |
e89a96f5 | 338 | return; |
0aaffa9b | 339 | |
4bf88530 JB |
340 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
341 | ||
342 | ctx->conf.def = *chandef; | |
343 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 344 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
345 | |
346 | if (!local->use_chanctx) { | |
675a0b04 | 347 | local->_oper_chandef = *chandef; |
55de908a JB |
348 | ieee80211_hw_config(local, 0); |
349 | } | |
0aaffa9b | 350 | } |
d01a1e65 MK |
351 | |
352 | static struct ieee80211_chanctx * | |
353 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 354 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
355 | enum ieee80211_chanctx_mode mode) |
356 | { | |
357 | struct ieee80211_chanctx *ctx; | |
358 | ||
359 | lockdep_assert_held(&local->chanctx_mtx); | |
360 | ||
361 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
362 | return NULL; | |
d01a1e65 MK |
363 | |
364 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 365 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 366 | |
5bcae31d MK |
367 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
368 | continue; | |
369 | ||
d01a1e65 MK |
370 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
371 | continue; | |
4bf88530 JB |
372 | |
373 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
374 | if (!compat) | |
d01a1e65 MK |
375 | continue; |
376 | ||
0288157b MK |
377 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
378 | compat); | |
379 | if (!compat) | |
380 | continue; | |
381 | ||
18942d3b | 382 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 383 | |
d01a1e65 MK |
384 | return ctx; |
385 | } | |
386 | ||
387 | return NULL; | |
388 | } | |
389 | ||
e4746851 SW |
390 | static bool ieee80211_is_radar_required(struct ieee80211_local *local) |
391 | { | |
392 | struct ieee80211_sub_if_data *sdata; | |
393 | ||
cc901de1 MK |
394 | lockdep_assert_held(&local->mtx); |
395 | ||
e4746851 SW |
396 | rcu_read_lock(); |
397 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
398 | if (sdata->radar_required) { | |
399 | rcu_read_unlock(); | |
400 | return true; | |
401 | } | |
402 | } | |
403 | rcu_read_unlock(); | |
404 | ||
405 | return false; | |
406 | } | |
407 | ||
d01a1e65 | 408 | static struct ieee80211_chanctx * |
ed68ebca MK |
409 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
410 | const struct cfg80211_chan_def *chandef, | |
411 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
412 | { |
413 | struct ieee80211_chanctx *ctx; | |
414 | ||
415 | lockdep_assert_held(&local->chanctx_mtx); | |
416 | ||
417 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
418 | if (!ctx) | |
ed68ebca | 419 | return NULL; |
d01a1e65 | 420 | |
484298ad | 421 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 422 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 423 | ctx->conf.def = *chandef; |
04ecd257 JB |
424 | ctx->conf.rx_chains_static = 1; |
425 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 426 | ctx->mode = mode; |
e4746851 | 427 | ctx->conf.radar_enabled = ieee80211_is_radar_required(local); |
21f659bf | 428 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
429 | |
430 | return ctx; | |
431 | } | |
432 | ||
433 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
434 | struct ieee80211_chanctx *ctx) | |
435 | { | |
436 | u32 changed; | |
437 | int err; | |
438 | ||
439 | lockdep_assert_held(&local->mtx); | |
440 | lockdep_assert_held(&local->chanctx_mtx); | |
441 | ||
e4746851 SW |
442 | if (!local->use_chanctx) |
443 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 444 | |
382a103b JB |
445 | /* turn idle off *before* setting channel -- some drivers need that */ |
446 | changed = ieee80211_idle_off(local); | |
447 | if (changed) | |
448 | ieee80211_hw_config(local, changed); | |
449 | ||
55de908a | 450 | if (!local->use_chanctx) { |
ed68ebca | 451 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 452 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
453 | } else { |
454 | err = drv_add_chanctx(local, ctx); | |
455 | if (err) { | |
382a103b | 456 | ieee80211_recalc_idle(local); |
ed68ebca | 457 | return err; |
55de908a | 458 | } |
35f2fce9 MK |
459 | } |
460 | ||
ed68ebca MK |
461 | return 0; |
462 | } | |
463 | ||
464 | static struct ieee80211_chanctx * | |
465 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
466 | const struct cfg80211_chan_def *chandef, | |
467 | enum ieee80211_chanctx_mode mode) | |
468 | { | |
469 | struct ieee80211_chanctx *ctx; | |
470 | int err; | |
d01a1e65 | 471 | |
ed68ebca MK |
472 | lockdep_assert_held(&local->mtx); |
473 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 474 | |
ed68ebca MK |
475 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
476 | if (!ctx) | |
477 | return ERR_PTR(-ENOMEM); | |
478 | ||
479 | err = ieee80211_add_chanctx(local, ctx); | |
480 | if (err) { | |
481 | kfree(ctx); | |
482 | return ERR_PTR(err); | |
483 | } | |
484 | ||
485 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
486 | return ctx; |
487 | } | |
488 | ||
1f0d54cd MK |
489 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
490 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
491 | { |
492 | lockdep_assert_held(&local->chanctx_mtx); | |
493 | ||
55de908a | 494 | if (!local->use_chanctx) { |
675a0b04 KB |
495 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
496 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
497 | chandef->center_freq1 = chandef->chan->center_freq; | |
498 | chandef->center_freq2 = 0; | |
e4746851 SW |
499 | |
500 | /* NOTE: Disabling radar is only valid here for | |
501 | * single channel context. To be sure, check it ... | |
502 | */ | |
1f0d54cd MK |
503 | WARN_ON(local->hw.conf.radar_enabled && |
504 | !list_empty(&local->chanctx_list)); | |
505 | ||
e4746851 SW |
506 | local->hw.conf.radar_enabled = false; |
507 | ||
9b4816f5 | 508 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
509 | } else { |
510 | drv_remove_chanctx(local, ctx); | |
511 | } | |
35f2fce9 | 512 | |
fd0f979a | 513 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
514 | } |
515 | ||
1f0d54cd MK |
516 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
517 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 518 | { |
d01a1e65 MK |
519 | lockdep_assert_held(&local->chanctx_mtx); |
520 | ||
c0166da9 | 521 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 522 | |
1f0d54cd MK |
523 | list_del_rcu(&ctx->list); |
524 | ieee80211_del_chanctx(local, ctx); | |
525 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
526 | } |
527 | ||
4bf88530 JB |
528 | static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
529 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
530 | { |
531 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
532 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 533 | const struct cfg80211_chan_def *compat = NULL; |
e89a96f5 MK |
534 | |
535 | lockdep_assert_held(&local->chanctx_mtx); | |
536 | ||
537 | rcu_read_lock(); | |
538 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 539 | |
e89a96f5 MK |
540 | if (!ieee80211_sdata_running(sdata)) |
541 | continue; | |
542 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
543 | continue; | |
544 | ||
4bf88530 JB |
545 | if (!compat) |
546 | compat = &sdata->vif.bss_conf.chandef; | |
547 | ||
548 | compat = cfg80211_chandef_compatible( | |
549 | &sdata->vif.bss_conf.chandef, compat); | |
550 | if (!compat) | |
551 | break; | |
e89a96f5 MK |
552 | } |
553 | rcu_read_unlock(); | |
554 | ||
4bf88530 JB |
555 | if (WARN_ON_ONCE(!compat)) |
556 | return; | |
e89a96f5 | 557 | |
18942d3b | 558 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
559 | } |
560 | ||
367bbd10 JB |
561 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
562 | struct ieee80211_chanctx *chanctx) | |
563 | { | |
564 | bool radar_enabled; | |
565 | ||
566 | lockdep_assert_held(&local->chanctx_mtx); | |
34a3740d JB |
567 | /* for setting local->radar_detect_enabled */ |
568 | lockdep_assert_held(&local->mtx); | |
367bbd10 JB |
569 | |
570 | radar_enabled = ieee80211_is_radar_required(local); | |
571 | ||
572 | if (radar_enabled == chanctx->conf.radar_enabled) | |
573 | return; | |
574 | ||
575 | chanctx->conf.radar_enabled = radar_enabled; | |
576 | local->radar_detect_enabled = chanctx->conf.radar_enabled; | |
577 | ||
578 | if (!local->use_chanctx) { | |
579 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
580 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
581 | } | |
582 | ||
583 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
584 | } | |
585 | ||
77eeba97 LC |
586 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
587 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 588 | { |
35f2fce9 | 589 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
590 | struct ieee80211_chanctx_conf *conf; |
591 | struct ieee80211_chanctx *curr_ctx = NULL; | |
592 | int ret = 0; | |
d01a1e65 | 593 | |
77eeba97 LC |
594 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
595 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 596 | |
77eeba97 LC |
597 | if (conf) { |
598 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 599 | |
77eeba97 LC |
600 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
601 | conf = NULL; | |
484298ad | 602 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 603 | } |
5bbe754d | 604 | |
77eeba97 LC |
605 | if (new_ctx) { |
606 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
607 | if (ret) | |
608 | goto out; | |
fd0f979a | 609 | |
77eeba97 | 610 | conf = &new_ctx->conf; |
484298ad MK |
611 | list_add(&sdata->assigned_chanctx_list, |
612 | &new_ctx->assigned_vifs); | |
77eeba97 | 613 | } |
e89a96f5 | 614 | |
77eeba97 LC |
615 | out: |
616 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 617 | |
77eeba97 LC |
618 | sdata->vif.bss_conf.idle = !conf; |
619 | ||
c0166da9 | 620 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
621 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
622 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
623 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
624 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 625 | } |
e89a96f5 | 626 | |
c0166da9 | 627 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
77eeba97 LC |
628 | ieee80211_recalc_txpower(sdata); |
629 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
04ecd257 | 630 | } |
77eeba97 LC |
631 | |
632 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
633 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
634 | ieee80211_bss_info_change_notify(sdata, | |
635 | BSS_CHANGED_IDLE); | |
636 | ||
637 | return ret; | |
d01a1e65 MK |
638 | } |
639 | ||
640 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) | |
641 | { | |
642 | struct ieee80211_local *local = sdata->local; | |
643 | struct ieee80211_chanctx_conf *conf; | |
644 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 645 | bool use_reserved_switch = false; |
d01a1e65 MK |
646 | |
647 | lockdep_assert_held(&local->chanctx_mtx); | |
648 | ||
649 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
650 | lockdep_is_held(&local->chanctx_mtx)); | |
651 | if (!conf) | |
652 | return; | |
653 | ||
654 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
655 | ||
5bcae31d MK |
656 | if (sdata->reserved_chanctx) { |
657 | if (sdata->reserved_chanctx->replace_state == | |
658 | IEEE80211_CHANCTX_REPLACES_OTHER && | |
659 | ieee80211_chanctx_num_reserved(local, | |
660 | sdata->reserved_chanctx) > 1) | |
661 | use_reserved_switch = true; | |
662 | ||
11335a55 | 663 | ieee80211_vif_unreserve_chanctx(sdata); |
5bcae31d | 664 | } |
11335a55 | 665 | |
77eeba97 | 666 | ieee80211_assign_vif_chanctx(sdata, NULL); |
c0166da9 | 667 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
d01a1e65 | 668 | ieee80211_free_chanctx(local, ctx); |
5bcae31d MK |
669 | |
670 | /* Unreserving may ready an in-place reservation. */ | |
671 | if (use_reserved_switch) | |
672 | ieee80211_vif_use_reserved_switch(local); | |
d01a1e65 MK |
673 | } |
674 | ||
04ecd257 JB |
675 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
676 | struct ieee80211_chanctx *chanctx) | |
677 | { | |
678 | struct ieee80211_sub_if_data *sdata; | |
679 | u8 rx_chains_static, rx_chains_dynamic; | |
680 | ||
681 | lockdep_assert_held(&local->chanctx_mtx); | |
682 | ||
683 | rx_chains_static = 1; | |
684 | rx_chains_dynamic = 1; | |
685 | ||
686 | rcu_read_lock(); | |
687 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
688 | u8 needed_static, needed_dynamic; | |
689 | ||
690 | if (!ieee80211_sdata_running(sdata)) | |
691 | continue; | |
692 | ||
693 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
694 | &chanctx->conf) | |
695 | continue; | |
696 | ||
697 | switch (sdata->vif.type) { | |
698 | case NL80211_IFTYPE_P2P_DEVICE: | |
699 | continue; | |
700 | case NL80211_IFTYPE_STATION: | |
701 | if (!sdata->u.mgd.associated) | |
702 | continue; | |
703 | break; | |
704 | case NL80211_IFTYPE_AP_VLAN: | |
705 | continue; | |
706 | case NL80211_IFTYPE_AP: | |
707 | case NL80211_IFTYPE_ADHOC: | |
708 | case NL80211_IFTYPE_WDS: | |
709 | case NL80211_IFTYPE_MESH_POINT: | |
710 | break; | |
711 | default: | |
712 | WARN_ON_ONCE(1); | |
713 | } | |
714 | ||
715 | switch (sdata->smps_mode) { | |
716 | default: | |
717 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
718 | sdata->smps_mode); | |
719 | /* fall through */ | |
720 | case IEEE80211_SMPS_OFF: | |
721 | needed_static = sdata->needed_rx_chains; | |
722 | needed_dynamic = sdata->needed_rx_chains; | |
723 | break; | |
724 | case IEEE80211_SMPS_DYNAMIC: | |
725 | needed_static = 1; | |
726 | needed_dynamic = sdata->needed_rx_chains; | |
727 | break; | |
728 | case IEEE80211_SMPS_STATIC: | |
729 | needed_static = 1; | |
730 | needed_dynamic = 1; | |
731 | break; | |
732 | } | |
733 | ||
734 | rx_chains_static = max(rx_chains_static, needed_static); | |
735 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
736 | } | |
7b8a9cdd IY |
737 | |
738 | /* Disable SMPS for the monitor interface */ | |
739 | sdata = rcu_dereference(local->monitor_sdata); | |
740 | if (sdata && | |
741 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
742 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
743 | ||
04ecd257 JB |
744 | rcu_read_unlock(); |
745 | ||
746 | if (!local->use_chanctx) { | |
747 | if (rx_chains_static > 1) | |
748 | local->smps_mode = IEEE80211_SMPS_OFF; | |
749 | else if (rx_chains_dynamic > 1) | |
750 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
751 | else | |
752 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
753 | ieee80211_hw_config(local, 0); | |
754 | } | |
755 | ||
756 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
757 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
758 | return; | |
759 | ||
760 | chanctx->conf.rx_chains_static = rx_chains_static; | |
761 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
762 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
763 | } | |
764 | ||
d01a1e65 | 765 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, |
4bf88530 | 766 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
767 | enum ieee80211_chanctx_mode mode) |
768 | { | |
769 | struct ieee80211_local *local = sdata->local; | |
770 | struct ieee80211_chanctx *ctx; | |
73de86a3 | 771 | u8 radar_detect_width = 0; |
d01a1e65 MK |
772 | int ret; |
773 | ||
34a3740d JB |
774 | lockdep_assert_held(&local->mtx); |
775 | ||
55de908a JB |
776 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
777 | ||
d01a1e65 | 778 | mutex_lock(&local->chanctx_mtx); |
73de86a3 LC |
779 | |
780 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
781 | chandef, | |
782 | sdata->wdev.iftype); | |
783 | if (ret < 0) | |
784 | goto out; | |
785 | if (ret > 0) | |
786 | radar_detect_width = BIT(chandef->width); | |
787 | ||
788 | sdata->radar_required = ret; | |
789 | ||
790 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
791 | radar_detect_width); | |
792 | if (ret < 0) | |
793 | goto out; | |
794 | ||
d01a1e65 MK |
795 | __ieee80211_vif_release_channel(sdata); |
796 | ||
4bf88530 | 797 | ctx = ieee80211_find_chanctx(local, chandef, mode); |
d01a1e65 | 798 | if (!ctx) |
4bf88530 | 799 | ctx = ieee80211_new_chanctx(local, chandef, mode); |
d01a1e65 MK |
800 | if (IS_ERR(ctx)) { |
801 | ret = PTR_ERR(ctx); | |
802 | goto out; | |
803 | } | |
804 | ||
4bf88530 | 805 | sdata->vif.bss_conf.chandef = *chandef; |
55de908a | 806 | |
d01a1e65 MK |
807 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); |
808 | if (ret) { | |
809 | /* if assign fails refcount stays the same */ | |
c0166da9 | 810 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
d01a1e65 MK |
811 | ieee80211_free_chanctx(local, ctx); |
812 | goto out; | |
813 | } | |
814 | ||
04ecd257 | 815 | ieee80211_recalc_smps_chanctx(local, ctx); |
164eb02d | 816 | ieee80211_recalc_radar_chanctx(local, ctx); |
d01a1e65 MK |
817 | out: |
818 | mutex_unlock(&local->chanctx_mtx); | |
819 | return ret; | |
820 | } | |
821 | ||
11335a55 LC |
822 | static void |
823 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
824 | bool clear) | |
825 | { | |
33926eb7 | 826 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
827 | struct ieee80211_sub_if_data *vlan; |
828 | struct ieee80211_chanctx_conf *conf; | |
829 | ||
830 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
831 | return; | |
832 | ||
833 | lockdep_assert_held(&local->mtx); | |
834 | ||
835 | /* Check that conf exists, even when clearing this function | |
836 | * must be called with the AP's channel context still there | |
837 | * as it would otherwise cause VLANs to have an invalid | |
838 | * channel context pointer for a while, possibly pointing | |
839 | * to a channel context that has already been freed. | |
840 | */ | |
841 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 842 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
843 | WARN_ON(!conf); |
844 | ||
845 | if (clear) | |
846 | conf = NULL; | |
847 | ||
848 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
849 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
850 | } | |
851 | ||
852 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
853 | bool clear) | |
854 | { | |
855 | struct ieee80211_local *local = sdata->local; | |
856 | ||
857 | mutex_lock(&local->chanctx_mtx); | |
858 | ||
859 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
860 | ||
861 | mutex_unlock(&local->chanctx_mtx); | |
862 | } | |
863 | ||
864 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
865 | { | |
e3afb920 MK |
866 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
867 | ||
11335a55 LC |
868 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
869 | ||
e3afb920 | 870 | if (WARN_ON(!ctx)) |
73da7d5b SW |
871 | return -EINVAL; |
872 | ||
e3afb920 | 873 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
874 | sdata->reserved_chanctx = NULL; |
875 | ||
5bcae31d MK |
876 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
877 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
878 | if (WARN_ON(!ctx->replace_ctx)) | |
879 | return -EINVAL; | |
880 | ||
881 | WARN_ON(ctx->replace_ctx->replace_state != | |
882 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
883 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
884 | ||
885 | ctx->replace_ctx->replace_ctx = NULL; | |
886 | ctx->replace_ctx->replace_state = | |
887 | IEEE80211_CHANCTX_REPLACE_NONE; | |
888 | ||
889 | list_del_rcu(&ctx->list); | |
890 | kfree_rcu(ctx, rcu_head); | |
891 | } else { | |
892 | ieee80211_free_chanctx(sdata->local, ctx); | |
893 | } | |
894 | } | |
e3afb920 | 895 | |
11335a55 LC |
896 | return 0; |
897 | } | |
898 | ||
899 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
900 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
901 | enum ieee80211_chanctx_mode mode, |
902 | bool radar_required) | |
11335a55 LC |
903 | { |
904 | struct ieee80211_local *local = sdata->local; | |
5bcae31d | 905 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 906 | |
5bcae31d | 907 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 908 | |
5bcae31d MK |
909 | curr_ctx = ieee80211_vif_get_chanctx(sdata); |
910 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) | |
911 | return -ENOTSUPP; | |
11335a55 | 912 | |
13f348a8 | 913 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 914 | if (!new_ctx) { |
5bcae31d | 915 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 916 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
917 | if (IS_ERR(new_ctx)) |
918 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 919 | } else { |
5bcae31d MK |
920 | if (!curr_ctx || |
921 | (curr_ctx->replace_state == | |
922 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
923 | !list_empty(&curr_ctx->reserved_vifs)) { | |
924 | /* | |
925 | * Another vif already requested this context | |
926 | * for a reservation. Find another one hoping | |
927 | * all vifs assigned to it will also switch | |
928 | * soon enough. | |
929 | * | |
930 | * TODO: This needs a little more work as some | |
931 | * cases (more than 2 chanctx capable devices) | |
932 | * may fail which could otherwise succeed | |
933 | * provided some channel context juggling was | |
934 | * performed. | |
935 | * | |
936 | * Consider ctx1..3, vif1..6, each ctx has 2 | |
937 | * vifs. vif1 and vif2 from ctx1 request new | |
938 | * different chandefs starting 2 in-place | |
939 | * reserations with ctx4 and ctx5 replacing | |
940 | * ctx1 and ctx2 respectively. Next vif5 and | |
941 | * vif6 from ctx3 reserve ctx4. If vif3 and | |
942 | * vif4 remain on ctx2 as they are then this | |
943 | * fails unless `replace_ctx` from ctx5 is | |
944 | * replaced with ctx3. | |
945 | */ | |
946 | list_for_each_entry(ctx, &local->chanctx_list, | |
947 | list) { | |
948 | if (ctx->replace_state != | |
949 | IEEE80211_CHANCTX_REPLACE_NONE) | |
950 | continue; | |
951 | ||
952 | if (!list_empty(&ctx->reserved_vifs)) | |
953 | continue; | |
954 | ||
955 | curr_ctx = ctx; | |
956 | break; | |
957 | } | |
958 | } | |
959 | ||
960 | /* | |
961 | * If that's true then all available contexts already | |
962 | * have reservations and cannot be used. | |
963 | */ | |
964 | if (!curr_ctx || | |
965 | (curr_ctx->replace_state == | |
966 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
967 | !list_empty(&curr_ctx->reserved_vifs)) | |
968 | return -EBUSY; | |
969 | ||
970 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
971 | if (!new_ctx) | |
972 | return -ENOMEM; | |
973 | ||
974 | new_ctx->replace_ctx = curr_ctx; | |
975 | new_ctx->replace_state = | |
976 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
977 | ||
978 | curr_ctx->replace_ctx = new_ctx; | |
979 | curr_ctx->replace_state = | |
980 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
981 | ||
982 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
983 | } |
984 | } | |
985 | ||
e3afb920 | 986 | list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); |
11335a55 LC |
987 | sdata->reserved_chanctx = new_ctx; |
988 | sdata->reserved_chandef = *chandef; | |
09332481 | 989 | sdata->reserved_radar_required = radar_required; |
5bcae31d MK |
990 | sdata->reserved_ready = false; |
991 | ||
992 | return 0; | |
11335a55 LC |
993 | } |
994 | ||
03078de4 MK |
995 | static void |
996 | ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) | |
997 | { | |
998 | switch (sdata->vif.type) { | |
999 | case NL80211_IFTYPE_ADHOC: | |
1000 | case NL80211_IFTYPE_AP: | |
1001 | case NL80211_IFTYPE_MESH_POINT: | |
1002 | ieee80211_queue_work(&sdata->local->hw, | |
1003 | &sdata->csa_finalize_work); | |
1004 | break; | |
03078de4 | 1005 | case NL80211_IFTYPE_STATION: |
4c3ebc56 MK |
1006 | ieee80211_queue_work(&sdata->local->hw, |
1007 | &sdata->u.mgd.chswitch_work); | |
1008 | break; | |
1009 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
1010 | case NL80211_IFTYPE_AP_VLAN: |
1011 | case NL80211_IFTYPE_WDS: | |
1012 | case NL80211_IFTYPE_MONITOR: | |
1013 | case NL80211_IFTYPE_P2P_CLIENT: | |
1014 | case NL80211_IFTYPE_P2P_GO: | |
1015 | case NL80211_IFTYPE_P2P_DEVICE: | |
1016 | case NUM_NL80211_IFTYPES: | |
1017 | WARN_ON(1); | |
1018 | break; | |
1019 | } | |
1020 | } | |
1021 | ||
5bcae31d MK |
1022 | static int |
1023 | ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata) | |
11335a55 LC |
1024 | { |
1025 | struct ieee80211_local *local = sdata->local; | |
5bcae31d MK |
1026 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
1027 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1028 | const struct cfg80211_chan_def *chandef; | |
1029 | u32 changed = 0; | |
1030 | int err; | |
11335a55 LC |
1031 | |
1032 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 1033 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 1034 | |
5bcae31d MK |
1035 | new_ctx = sdata->reserved_chanctx; |
1036 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
11335a55 | 1037 | |
5bcae31d MK |
1038 | if (WARN_ON(!sdata->reserved_ready)) |
1039 | return -EBUSY; | |
73da7d5b | 1040 | |
5bcae31d MK |
1041 | if (WARN_ON(!new_ctx)) |
1042 | return -EINVAL; | |
1043 | ||
1044 | if (WARN_ON(!old_ctx)) | |
1045 | return -EINVAL; | |
1046 | ||
1047 | if (WARN_ON(new_ctx->replace_state == | |
1048 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1049 | return -EINVAL; | |
1050 | ||
1051 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1052 | &sdata->reserved_chandef); | |
1053 | if (WARN_ON(!chandef)) | |
1054 | return -EINVAL; | |
1055 | ||
1056 | vif_chsw[0].vif = &sdata->vif; | |
1057 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1058 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
1059 | ||
1060 | list_del(&sdata->reserved_chanctx_list); | |
1061 | sdata->reserved_chanctx = NULL; | |
1062 | ||
1063 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1064 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1065 | if (err) { | |
1066 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1067 | ieee80211_free_chanctx(local, new_ctx); | |
1068 | ||
03078de4 | 1069 | goto out; |
73da7d5b SW |
1070 | } |
1071 | ||
5bcae31d MK |
1072 | list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs); |
1073 | rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf); | |
1074 | ||
1075 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1076 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1077 | ||
1078 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) | |
1079 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1080 | |
11335a55 | 1081 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
5bcae31d | 1082 | changed = BSS_CHANGED_BANDWIDTH; |
11335a55 LC |
1083 | |
1084 | sdata->vif.bss_conf.chandef = sdata->reserved_chandef; | |
1085 | ||
5bcae31d MK |
1086 | if (changed) |
1087 | ieee80211_bss_info_change_notify(sdata, changed); | |
1088 | ||
03078de4 MK |
1089 | out: |
1090 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1091 | return err; |
1092 | } | |
1093 | ||
1094 | static int | |
1095 | ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata) | |
1096 | { | |
1097 | struct ieee80211_local *local = sdata->local; | |
1098 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1099 | const struct cfg80211_chan_def *chandef; | |
1100 | int err; | |
1101 | ||
1102 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1103 | new_ctx = sdata->reserved_chanctx; | |
1104 | ||
1105 | if (WARN_ON(!sdata->reserved_ready)) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | if (WARN_ON(old_ctx)) | |
1109 | return -EINVAL; | |
1110 | ||
1111 | if (WARN_ON(!new_ctx)) | |
1112 | return -EINVAL; | |
1113 | ||
1114 | if (WARN_ON(new_ctx->replace_state == | |
1115 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1119 | &sdata->reserved_chandef); | |
1120 | if (WARN_ON(!chandef)) | |
1121 | return -EINVAL; | |
1122 | ||
e3afb920 | 1123 | list_del(&sdata->reserved_chanctx_list); |
5bcae31d | 1124 | sdata->reserved_chanctx = NULL; |
11335a55 | 1125 | |
5bcae31d MK |
1126 | err = ieee80211_assign_vif_chanctx(sdata, new_ctx); |
1127 | if (err) { | |
1128 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1129 | ieee80211_free_chanctx(local, new_ctx); | |
1130 | ||
1131 | goto out; | |
1132 | } | |
1133 | ||
1134 | out: | |
03078de4 | 1135 | ieee80211_vif_chanctx_reservation_complete(sdata); |
5bcae31d MK |
1136 | return err; |
1137 | } | |
1138 | ||
1139 | static bool | |
1140 | ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata) | |
1141 | { | |
1142 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1143 | ||
1144 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1145 | ||
1146 | new_ctx = sdata->reserved_chanctx; | |
1147 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1148 | ||
1149 | if (!old_ctx) | |
1150 | return false; | |
1151 | ||
1152 | if (WARN_ON(!new_ctx)) | |
1153 | return false; | |
1154 | ||
1155 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1156 | return false; | |
1157 | ||
1158 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1159 | return false; | |
1160 | ||
1161 | return true; | |
1162 | } | |
1163 | ||
1164 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1165 | struct ieee80211_chanctx *new_ctx) | |
1166 | { | |
1167 | const struct cfg80211_chan_def *chandef; | |
1168 | ||
1169 | lockdep_assert_held(&local->mtx); | |
1170 | lockdep_assert_held(&local->chanctx_mtx); | |
1171 | ||
1172 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1173 | if (WARN_ON(!chandef)) | |
1174 | return -EINVAL; | |
1175 | ||
1176 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1177 | local->_oper_chandef = *chandef; | |
1178 | ieee80211_hw_config(local, 0); | |
1179 | ||
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1184 | int n_vifs) | |
1185 | { | |
1186 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
1187 | struct ieee80211_sub_if_data *sdata; | |
1188 | struct ieee80211_chanctx *ctx, *old_ctx; | |
1189 | int i, err; | |
1190 | ||
1191 | lockdep_assert_held(&local->mtx); | |
1192 | lockdep_assert_held(&local->chanctx_mtx); | |
1193 | ||
1194 | vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL); | |
1195 | if (!vif_chsw) | |
1196 | return -ENOMEM; | |
1197 | ||
1198 | i = 0; | |
1199 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1200 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1201 | continue; | |
1202 | ||
1203 | if (WARN_ON(!ctx->replace_ctx)) { | |
1204 | err = -EINVAL; | |
5d52ee81 LC |
1205 | goto out; |
1206 | } | |
11335a55 | 1207 | |
5bcae31d MK |
1208 | list_for_each_entry(sdata, &ctx->reserved_vifs, |
1209 | reserved_chanctx_list) { | |
1210 | if (!ieee80211_vif_has_in_place_reservation( | |
1211 | sdata)) | |
1212 | continue; | |
1213 | ||
1214 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1215 | vif_chsw[i].vif = &sdata->vif; | |
1216 | vif_chsw[i].old_ctx = &old_ctx->conf; | |
1217 | vif_chsw[i].new_ctx = &ctx->conf; | |
1218 | ||
1219 | i++; | |
1220 | } | |
5d52ee81 | 1221 | } |
11335a55 | 1222 | |
5bcae31d MK |
1223 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1224 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1225 | |
11335a55 | 1226 | out: |
5bcae31d MK |
1227 | kfree(vif_chsw); |
1228 | return err; | |
1229 | } | |
1230 | ||
1231 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1232 | { | |
1233 | struct ieee80211_chanctx *ctx; | |
1234 | int err; | |
1235 | ||
1236 | lockdep_assert_held(&local->mtx); | |
1237 | lockdep_assert_held(&local->chanctx_mtx); | |
1238 | ||
1239 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1240 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1241 | continue; | |
1242 | ||
1243 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1244 | continue; | |
1245 | ||
1246 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1247 | err = ieee80211_add_chanctx(local, ctx); | |
1248 | if (err) | |
1249 | goto err; | |
1250 | } | |
1251 | ||
1252 | return 0; | |
1253 | ||
1254 | err: | |
1255 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1256 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1257 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1258 | continue; | |
1259 | ||
1260 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1261 | continue; | |
1262 | ||
1263 | ieee80211_del_chanctx(local, ctx); | |
1264 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1265 | } | |
1266 | ||
1267 | return err; | |
1268 | } | |
1269 | ||
1270 | int | |
1271 | ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) | |
1272 | { | |
1273 | struct ieee80211_sub_if_data *sdata, *sdata_tmp; | |
1274 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; | |
1275 | struct ieee80211_chanctx *new_ctx = NULL; | |
1276 | int i, err, n_assigned, n_reserved, n_ready; | |
1277 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; | |
1278 | ||
1279 | lockdep_assert_held(&local->mtx); | |
1280 | lockdep_assert_held(&local->chanctx_mtx); | |
1281 | ||
1282 | /* | |
1283 | * If there are 2 independent pairs of channel contexts performing | |
1284 | * cross-switch of their vifs this code will still wait until both are | |
1285 | * ready even though it could be possible to switch one before the | |
1286 | * other is ready. | |
1287 | * | |
1288 | * For practical reasons and code simplicity just do a single huge | |
1289 | * switch. | |
1290 | */ | |
1291 | ||
1292 | /* | |
1293 | * Verify if the reservation is still feasible. | |
1294 | * - if it's not then disconnect | |
1295 | * - if it is but not all vifs necessary are ready then defer | |
1296 | */ | |
1297 | ||
1298 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1299 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1300 | continue; | |
1301 | ||
1302 | if (WARN_ON(!ctx->replace_ctx)) { | |
1303 | err = -EINVAL; | |
1304 | goto err; | |
1305 | } | |
1306 | ||
1307 | if (!local->use_chanctx) | |
1308 | new_ctx = ctx; | |
1309 | ||
1310 | n_ctx++; | |
1311 | ||
1312 | n_assigned = 0; | |
1313 | n_reserved = 0; | |
1314 | n_ready = 0; | |
1315 | ||
1316 | list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs, | |
1317 | assigned_chanctx_list) { | |
1318 | n_assigned++; | |
1319 | if (sdata->reserved_chanctx) { | |
1320 | n_reserved++; | |
1321 | if (sdata->reserved_ready) | |
1322 | n_ready++; | |
1323 | } | |
1324 | } | |
1325 | ||
1326 | if (n_assigned != n_reserved) { | |
1327 | if (n_ready == n_reserved) { | |
1328 | wiphy_info(local->hw.wiphy, | |
1329 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1330 | err = -EBUSY; | |
1331 | goto err; | |
1332 | } | |
1333 | ||
1334 | return -EAGAIN; | |
1335 | } | |
1336 | ||
1337 | ctx->conf.radar_enabled = false; | |
1338 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1339 | reserved_chanctx_list) { | |
1340 | if (ieee80211_vif_has_in_place_reservation(sdata) && | |
1341 | !sdata->reserved_ready) | |
1342 | return -EAGAIN; | |
1343 | ||
1344 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1345 | if (old_ctx) { | |
1346 | if (old_ctx->replace_state == | |
1347 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1348 | n_vifs_switch++; | |
1349 | else | |
1350 | n_vifs_assign++; | |
1351 | } else { | |
1352 | n_vifs_ctxless++; | |
1353 | } | |
1354 | ||
1355 | if (sdata->reserved_radar_required) | |
1356 | ctx->conf.radar_enabled = true; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | if (WARN_ON(n_ctx == 0) || | |
1361 | WARN_ON(n_vifs_switch == 0 && | |
1362 | n_vifs_assign == 0 && | |
1363 | n_vifs_ctxless == 0) || | |
1364 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1365 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1366 | err = -EINVAL; | |
1367 | goto err; | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | * All necessary vifs are ready. Perform the switch now depending on | |
1372 | * reservations and driver capabilities. | |
1373 | */ | |
1374 | ||
1375 | if (local->use_chanctx) { | |
1376 | if (n_vifs_switch > 0) { | |
1377 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1378 | if (err) | |
1379 | goto err; | |
1380 | } | |
1381 | ||
1382 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1383 | err = ieee80211_chsw_switch_ctxs(local); | |
1384 | if (err) | |
1385 | goto err; | |
1386 | } | |
1387 | } else { | |
1388 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1389 | if (err) | |
1390 | goto err; | |
1391 | } | |
1392 | ||
1393 | /* | |
1394 | * Update all structures, values and pointers to point to new channel | |
1395 | * context(s). | |
1396 | */ | |
1397 | ||
1398 | i = 0; | |
1399 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1400 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1401 | continue; | |
1402 | ||
1403 | if (WARN_ON(!ctx->replace_ctx)) { | |
1404 | err = -EINVAL; | |
1405 | goto err; | |
1406 | } | |
1407 | ||
1408 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1409 | reserved_chanctx_list) { | |
1410 | u32 changed = 0; | |
1411 | ||
1412 | if (!ieee80211_vif_has_in_place_reservation(sdata)) | |
1413 | continue; | |
1414 | ||
1415 | rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); | |
1416 | ||
1417 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1418 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, | |
1419 | false); | |
1420 | ||
1421 | sdata->radar_required = sdata->reserved_radar_required; | |
1422 | ||
1423 | if (sdata->vif.bss_conf.chandef.width != | |
1424 | sdata->reserved_chandef.width) | |
1425 | changed = BSS_CHANGED_BANDWIDTH; | |
1426 | ||
1427 | sdata->vif.bss_conf.chandef = sdata->reserved_chandef; | |
1428 | if (changed) | |
1429 | ieee80211_bss_info_change_notify(sdata, | |
1430 | changed); | |
1431 | ||
1432 | ieee80211_recalc_txpower(sdata); | |
1433 | } | |
1434 | ||
1435 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1436 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1437 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1438 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1439 | ||
1440 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1441 | reserved_chanctx_list) { | |
1442 | if (ieee80211_vif_get_chanctx(sdata) != ctx) | |
1443 | continue; | |
1444 | ||
1445 | list_del(&sdata->reserved_chanctx_list); | |
1446 | list_move(&sdata->assigned_chanctx_list, | |
1447 | &new_ctx->assigned_vifs); | |
1448 | sdata->reserved_chanctx = NULL; | |
03078de4 MK |
1449 | |
1450 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1451 | } |
1452 | ||
1453 | /* | |
1454 | * This context might have been a dependency for an already | |
1455 | * ready re-assign reservation interface that was deferred. Do | |
1456 | * not propagate error to the caller though. The in-place | |
1457 | * reservation for originally requested interface has already | |
1458 | * succeeded at this point. | |
1459 | */ | |
1460 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1461 | reserved_chanctx_list) { | |
1462 | if (WARN_ON(ieee80211_vif_has_in_place_reservation( | |
1463 | sdata))) | |
1464 | continue; | |
1465 | ||
1466 | if (WARN_ON(sdata->reserved_chanctx != ctx)) | |
1467 | continue; | |
1468 | ||
1469 | if (!sdata->reserved_ready) | |
1470 | continue; | |
1471 | ||
1472 | if (ieee80211_vif_get_chanctx(sdata)) | |
1473 | err = ieee80211_vif_use_reserved_reassign( | |
1474 | sdata); | |
1475 | else | |
1476 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1477 | ||
1478 | if (err) { | |
1479 | sdata_info(sdata, | |
1480 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1481 | err); | |
1482 | ieee80211_vif_unreserve_chanctx(sdata); | |
1483 | cfg80211_stop_iface(local->hw.wiphy, | |
1484 | &sdata->wdev, | |
1485 | GFP_KERNEL); | |
1486 | } | |
1487 | } | |
1488 | } | |
1489 | ||
1490 | /* | |
1491 | * Finally free old contexts | |
1492 | */ | |
1493 | ||
1494 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1495 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1496 | continue; | |
1497 | ||
1498 | ctx->replace_ctx->replace_ctx = NULL; | |
1499 | ctx->replace_ctx->replace_state = | |
1500 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1501 | ||
1502 | list_del_rcu(&ctx->list); | |
1503 | kfree_rcu(ctx, rcu_head); | |
1504 | } | |
1505 | ||
1506 | return 0; | |
1507 | ||
1508 | err: | |
1509 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1510 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1511 | continue; | |
1512 | ||
1513 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
03078de4 | 1514 | reserved_chanctx_list) { |
5bcae31d | 1515 | ieee80211_vif_unreserve_chanctx(sdata); |
03078de4 MK |
1516 | ieee80211_vif_chanctx_reservation_complete(sdata); |
1517 | } | |
5bcae31d MK |
1518 | } |
1519 | ||
1520 | return err; | |
1521 | } | |
1522 | ||
1523 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata) | |
1524 | { | |
1525 | struct ieee80211_local *local = sdata->local; | |
1526 | struct ieee80211_chanctx *new_ctx; | |
1527 | struct ieee80211_chanctx *old_ctx; | |
1528 | int err; | |
1529 | ||
1530 | lockdep_assert_held(&local->mtx); | |
1531 | lockdep_assert_held(&local->chanctx_mtx); | |
1532 | ||
1533 | new_ctx = sdata->reserved_chanctx; | |
1534 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1535 | ||
1536 | if (WARN_ON(!new_ctx)) | |
1537 | return -EINVAL; | |
1538 | ||
1539 | if (WARN_ON(new_ctx->replace_state == | |
1540 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1541 | return -EINVAL; | |
1542 | ||
1543 | if (WARN_ON(sdata->reserved_ready)) | |
1544 | return -EINVAL; | |
1545 | ||
1546 | sdata->reserved_ready = true; | |
1547 | ||
1548 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1549 | if (old_ctx) | |
1550 | err = ieee80211_vif_use_reserved_reassign(sdata); | |
1551 | else | |
1552 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1553 | ||
1554 | if (err) | |
1555 | return err; | |
1556 | } | |
1557 | ||
1558 | /* | |
1559 | * In-place reservation may need to be finalized now either if: | |
1560 | * a) sdata is taking part in the swapping itself and is the last one | |
1561 | * b) sdata has switched with a re-assign reservation to an existing | |
1562 | * context readying in-place switching of old_ctx | |
1563 | * | |
1564 | * In case of (b) do not propagate the error up because the requested | |
1565 | * sdata already switched successfully. Just spill an extra warning. | |
1566 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1567 | * interfaces upon failure. | |
1568 | */ | |
1569 | if ((old_ctx && | |
1570 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1571 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1572 | err = ieee80211_vif_use_reserved_switch(local); | |
1573 | if (err && err != -EAGAIN) { | |
1574 | if (new_ctx->replace_state == | |
1575 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1576 | return err; | |
1577 | ||
1578 | wiphy_info(local->hw.wiphy, | |
1579 | "depending in-place reservation failed (err=%d)\n", | |
1580 | err); | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | return 0; | |
73da7d5b SW |
1585 | } |
1586 | ||
2c9b7359 JB |
1587 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1588 | const struct cfg80211_chan_def *chandef, | |
1589 | u32 *changed) | |
1590 | { | |
1591 | struct ieee80211_local *local = sdata->local; | |
1592 | struct ieee80211_chanctx_conf *conf; | |
1593 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1594 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1595 | int ret; |
1596 | ||
1597 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1598 | IEEE80211_CHAN_DISABLED)) | |
1599 | return -EINVAL; | |
1600 | ||
1601 | mutex_lock(&local->chanctx_mtx); | |
1602 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1603 | ret = 0; | |
1604 | goto out; | |
1605 | } | |
1606 | ||
1607 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1608 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1609 | ret = -EINVAL; | |
1610 | goto out; | |
1611 | } | |
1612 | ||
1613 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1614 | lockdep_is_held(&local->chanctx_mtx)); | |
1615 | if (!conf) { | |
1616 | ret = -EINVAL; | |
1617 | goto out; | |
1618 | } | |
1619 | ||
1620 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1621 | |
1622 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1623 | if (!compat) { | |
2c9b7359 JB |
1624 | ret = -EINVAL; |
1625 | goto out; | |
1626 | } | |
1627 | ||
5bcae31d MK |
1628 | switch (ctx->replace_state) { |
1629 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1630 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1631 | ret = -EBUSY; | |
1632 | goto out; | |
1633 | } | |
1634 | break; | |
1635 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
1636 | /* TODO: Perhaps the bandwith change could be treated as a | |
1637 | * reservation itself? */ | |
1638 | ret = -EBUSY; | |
1639 | goto out; | |
1640 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1641 | /* channel context that is going to replace another channel | |
1642 | * context doesn't really exist and shouldn't be assigned | |
1643 | * anywhere yet */ | |
1644 | WARN_ON(1); | |
1645 | break; | |
1646 | } | |
1647 | ||
2c9b7359 JB |
1648 | sdata->vif.bss_conf.chandef = *chandef; |
1649 | ||
1650 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1651 | ||
1652 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1653 | ret = 0; | |
1654 | out: | |
1655 | mutex_unlock(&local->chanctx_mtx); | |
1656 | return ret; | |
1657 | } | |
1658 | ||
d01a1e65 MK |
1659 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1660 | { | |
55de908a JB |
1661 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1662 | ||
34a3740d JB |
1663 | lockdep_assert_held(&sdata->local->mtx); |
1664 | ||
d01a1e65 MK |
1665 | mutex_lock(&sdata->local->chanctx_mtx); |
1666 | __ieee80211_vif_release_channel(sdata); | |
1667 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1668 | } | |
3448c005 | 1669 | |
4d76d21b JB |
1670 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1671 | { | |
1672 | struct ieee80211_local *local = sdata->local; | |
1673 | struct ieee80211_sub_if_data *ap; | |
1674 | struct ieee80211_chanctx_conf *conf; | |
1675 | ||
1676 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1677 | return; | |
1678 | ||
1679 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1680 | ||
1681 | mutex_lock(&local->chanctx_mtx); | |
1682 | ||
1683 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1684 | lockdep_is_held(&local->chanctx_mtx)); | |
1685 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1686 | mutex_unlock(&local->chanctx_mtx); | |
1687 | } | |
1688 | ||
3448c005 JB |
1689 | void ieee80211_iter_chan_contexts_atomic( |
1690 | struct ieee80211_hw *hw, | |
1691 | void (*iter)(struct ieee80211_hw *hw, | |
1692 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1693 | void *data), | |
1694 | void *iter_data) | |
1695 | { | |
1696 | struct ieee80211_local *local = hw_to_local(hw); | |
1697 | struct ieee80211_chanctx *ctx; | |
1698 | ||
1699 | rcu_read_lock(); | |
1700 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1701 | if (ctx->driver_present) |
1702 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1703 | rcu_read_unlock(); |
1704 | } | |
1705 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |