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Commit | Line | Data |
---|---|---|
f444de05 JB |
1 | /* |
2 | * mac80211 - channel management | |
3 | */ | |
4 | ||
0aaffa9b | 5 | #include <linux/nl80211.h> |
3448c005 | 6 | #include <linux/export.h> |
4d76d21b | 7 | #include <linux/rtnetlink.h> |
3117bbdb | 8 | #include <net/cfg80211.h> |
f444de05 | 9 | #include "ieee80211_i.h" |
35f2fce9 | 10 | #include "driver-ops.h" |
f444de05 | 11 | |
c0166da9 MK |
12 | static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local, |
13 | struct ieee80211_chanctx *ctx) | |
14 | { | |
15 | struct ieee80211_sub_if_data *sdata; | |
16 | int num = 0; | |
17 | ||
18 | lockdep_assert_held(&local->chanctx_mtx); | |
19 | ||
20 | list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list) | |
21 | num++; | |
22 | ||
23 | return num; | |
24 | } | |
25 | ||
26 | static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local, | |
27 | struct ieee80211_chanctx *ctx) | |
28 | { | |
29 | struct ieee80211_sub_if_data *sdata; | |
30 | int num = 0; | |
31 | ||
32 | lockdep_assert_held(&local->chanctx_mtx); | |
33 | ||
34 | list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list) | |
35 | num++; | |
36 | ||
37 | return num; | |
38 | } | |
39 | ||
40 | int ieee80211_chanctx_refcount(struct ieee80211_local *local, | |
41 | struct ieee80211_chanctx *ctx) | |
42 | { | |
43 | return ieee80211_chanctx_num_assigned(local, ctx) + | |
44 | ieee80211_chanctx_num_reserved(local, ctx); | |
45 | } | |
46 | ||
c2b90ad8 MK |
47 | static int ieee80211_num_chanctx(struct ieee80211_local *local) |
48 | { | |
49 | struct ieee80211_chanctx *ctx; | |
50 | int num = 0; | |
51 | ||
52 | lockdep_assert_held(&local->chanctx_mtx); | |
53 | ||
54 | list_for_each_entry(ctx, &local->chanctx_list, list) | |
55 | num++; | |
56 | ||
57 | return num; | |
58 | } | |
59 | ||
60 | static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local) | |
61 | { | |
62 | lockdep_assert_held(&local->chanctx_mtx); | |
63 | return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local); | |
64 | } | |
65 | ||
5bcae31d MK |
66 | static struct ieee80211_chanctx * |
67 | ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata) | |
68 | { | |
1d4cc30c | 69 | struct ieee80211_local *local __maybe_unused = sdata->local; |
5bcae31d MK |
70 | struct ieee80211_chanctx_conf *conf; |
71 | ||
72 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
73 | lockdep_is_held(&local->chanctx_mtx)); | |
74 | if (!conf) | |
75 | return NULL; | |
76 | ||
77 | return container_of(conf, struct ieee80211_chanctx, conf); | |
78 | } | |
79 | ||
0288157b MK |
80 | static const struct cfg80211_chan_def * |
81 | ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, | |
82 | struct ieee80211_chanctx *ctx, | |
83 | const struct cfg80211_chan_def *compat) | |
84 | { | |
85 | struct ieee80211_sub_if_data *sdata; | |
86 | ||
87 | lockdep_assert_held(&local->chanctx_mtx); | |
88 | ||
89 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
90 | reserved_chanctx_list) { | |
91 | if (!compat) | |
92 | compat = &sdata->reserved_chandef; | |
93 | ||
94 | compat = cfg80211_chandef_compatible(&sdata->reserved_chandef, | |
95 | compat); | |
96 | if (!compat) | |
97 | break; | |
98 | } | |
99 | ||
100 | return compat; | |
101 | } | |
102 | ||
13f348a8 MK |
103 | static const struct cfg80211_chan_def * |
104 | ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, | |
105 | struct ieee80211_chanctx *ctx, | |
106 | const struct cfg80211_chan_def *compat) | |
107 | { | |
108 | struct ieee80211_sub_if_data *sdata; | |
109 | ||
110 | lockdep_assert_held(&local->chanctx_mtx); | |
111 | ||
112 | list_for_each_entry(sdata, &ctx->assigned_vifs, | |
113 | assigned_chanctx_list) { | |
114 | if (sdata->reserved_chanctx != NULL) | |
115 | continue; | |
116 | ||
117 | if (!compat) | |
118 | compat = &sdata->vif.bss_conf.chandef; | |
119 | ||
120 | compat = cfg80211_chandef_compatible( | |
121 | &sdata->vif.bss_conf.chandef, compat); | |
122 | if (!compat) | |
123 | break; | |
124 | } | |
125 | ||
126 | return compat; | |
127 | } | |
128 | ||
129 | static const struct cfg80211_chan_def * | |
130 | ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, | |
131 | struct ieee80211_chanctx *ctx, | |
132 | const struct cfg80211_chan_def *compat) | |
133 | { | |
134 | lockdep_assert_held(&local->chanctx_mtx); | |
135 | ||
136 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); | |
137 | if (!compat) | |
138 | return NULL; | |
139 | ||
140 | compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); | |
141 | if (!compat) | |
142 | return NULL; | |
143 | ||
144 | return compat; | |
145 | } | |
146 | ||
147 | static bool | |
148 | ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, | |
149 | struct ieee80211_chanctx *ctx, | |
150 | const struct cfg80211_chan_def *def) | |
151 | { | |
152 | lockdep_assert_held(&local->chanctx_mtx); | |
153 | ||
154 | if (ieee80211_chanctx_combined_chandef(local, ctx, def)) | |
155 | return true; | |
156 | ||
157 | if (!list_empty(&ctx->reserved_vifs) && | |
158 | ieee80211_chanctx_reserved_chandef(local, ctx, def)) | |
159 | return true; | |
160 | ||
161 | return false; | |
162 | } | |
163 | ||
164 | static struct ieee80211_chanctx * | |
165 | ieee80211_find_reservation_chanctx(struct ieee80211_local *local, | |
166 | const struct cfg80211_chan_def *chandef, | |
167 | enum ieee80211_chanctx_mode mode) | |
168 | { | |
169 | struct ieee80211_chanctx *ctx; | |
170 | ||
171 | lockdep_assert_held(&local->chanctx_mtx); | |
172 | ||
173 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
174 | return NULL; | |
175 | ||
176 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
5bcae31d MK |
177 | if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) |
178 | continue; | |
179 | ||
13f348a8 MK |
180 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
181 | continue; | |
182 | ||
183 | if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, | |
184 | chandef)) | |
185 | continue; | |
186 | ||
187 | return ctx; | |
188 | } | |
189 | ||
190 | return NULL; | |
191 | } | |
192 | ||
21f659bf EP |
193 | static enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta) |
194 | { | |
195 | switch (sta->bandwidth) { | |
196 | case IEEE80211_STA_RX_BW_20: | |
197 | if (sta->ht_cap.ht_supported) | |
198 | return NL80211_CHAN_WIDTH_20; | |
199 | else | |
200 | return NL80211_CHAN_WIDTH_20_NOHT; | |
201 | case IEEE80211_STA_RX_BW_40: | |
202 | return NL80211_CHAN_WIDTH_40; | |
203 | case IEEE80211_STA_RX_BW_80: | |
204 | return NL80211_CHAN_WIDTH_80; | |
205 | case IEEE80211_STA_RX_BW_160: | |
206 | /* | |
207 | * This applied for both 160 and 80+80. since we use | |
208 | * the returned value to consider degradation of | |
209 | * ctx->conf.min_def, we have to make sure to take | |
210 | * the bigger one (NL80211_CHAN_WIDTH_160). | |
211 | * Otherwise we might try degrading even when not | |
212 | * needed, as the max required sta_bw returned (80+80) | |
213 | * might be smaller than the configured bw (160). | |
214 | */ | |
215 | return NL80211_CHAN_WIDTH_160; | |
216 | default: | |
217 | WARN_ON(1); | |
218 | return NL80211_CHAN_WIDTH_20; | |
219 | } | |
220 | } | |
221 | ||
222 | static enum nl80211_chan_width | |
223 | ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata) | |
224 | { | |
225 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
226 | struct sta_info *sta; | |
227 | ||
228 | rcu_read_lock(); | |
229 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
230 | if (sdata != sta->sdata && | |
231 | !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) | |
232 | continue; | |
233 | ||
234 | if (!sta->uploaded) | |
235 | continue; | |
236 | ||
237 | max_bw = max(max_bw, ieee80211_get_sta_bw(&sta->sta)); | |
238 | } | |
239 | rcu_read_unlock(); | |
240 | ||
241 | return max_bw; | |
242 | } | |
243 | ||
244 | static enum nl80211_chan_width | |
245 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
246 | struct ieee80211_chanctx_conf *conf) | |
247 | { | |
248 | struct ieee80211_sub_if_data *sdata; | |
249 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
250 | ||
251 | rcu_read_lock(); | |
252 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
253 | struct ieee80211_vif *vif = &sdata->vif; | |
254 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; | |
255 | ||
256 | if (!ieee80211_sdata_running(sdata)) | |
257 | continue; | |
258 | ||
259 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
260 | continue; | |
261 | ||
262 | switch (vif->type) { | |
263 | case NL80211_IFTYPE_AP: | |
264 | case NL80211_IFTYPE_AP_VLAN: | |
265 | width = ieee80211_get_max_required_bw(sdata); | |
266 | break; | |
267 | case NL80211_IFTYPE_P2P_DEVICE: | |
268 | continue; | |
269 | case NL80211_IFTYPE_STATION: | |
270 | case NL80211_IFTYPE_ADHOC: | |
271 | case NL80211_IFTYPE_WDS: | |
272 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 273 | case NL80211_IFTYPE_OCB: |
21f659bf EP |
274 | width = vif->bss_conf.chandef.width; |
275 | break; | |
276 | case NL80211_IFTYPE_UNSPECIFIED: | |
277 | case NUM_NL80211_IFTYPES: | |
278 | case NL80211_IFTYPE_MONITOR: | |
279 | case NL80211_IFTYPE_P2P_CLIENT: | |
280 | case NL80211_IFTYPE_P2P_GO: | |
281 | WARN_ON_ONCE(1); | |
282 | } | |
283 | max_bw = max(max_bw, width); | |
284 | } | |
1c37a72c EP |
285 | |
286 | /* use the configured bandwidth in case of monitor interface */ | |
287 | sdata = rcu_dereference(local->monitor_sdata); | |
288 | if (sdata && rcu_access_pointer(sdata->vif.chanctx_conf) == conf) | |
289 | max_bw = max(max_bw, conf->def.width); | |
290 | ||
21f659bf EP |
291 | rcu_read_unlock(); |
292 | ||
293 | return max_bw; | |
294 | } | |
295 | ||
296 | /* | |
297 | * recalc the min required chan width of the channel context, which is | |
298 | * the max of min required widths of all the interfaces bound to this | |
299 | * channel context. | |
300 | */ | |
301 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
302 | struct ieee80211_chanctx *ctx) | |
303 | { | |
304 | enum nl80211_chan_width max_bw; | |
305 | struct cfg80211_chan_def min_def; | |
306 | ||
307 | lockdep_assert_held(&local->chanctx_mtx); | |
308 | ||
309 | /* don't optimize 5MHz, 10MHz, and radar_enabled confs */ | |
310 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || | |
311 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
312 | ctx->conf.radar_enabled) { | |
313 | ctx->conf.min_def = ctx->conf.def; | |
314 | return; | |
315 | } | |
316 | ||
317 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
318 | ||
319 | /* downgrade chandef up to max_bw */ | |
320 | min_def = ctx->conf.def; | |
321 | while (min_def.width > max_bw) | |
322 | ieee80211_chandef_downgrade(&min_def); | |
323 | ||
324 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
325 | return; | |
326 | ||
327 | ctx->conf.min_def = min_def; | |
328 | if (!ctx->driver_present) | |
329 | return; | |
330 | ||
331 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_MIN_WIDTH); | |
332 | } | |
333 | ||
18942d3b | 334 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
4bf88530 JB |
335 | struct ieee80211_chanctx *ctx, |
336 | const struct cfg80211_chan_def *chandef) | |
23a85b45 | 337 | { |
4bf88530 | 338 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) |
e89a96f5 | 339 | return; |
0aaffa9b | 340 | |
4bf88530 JB |
341 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
342 | ||
343 | ctx->conf.def = *chandef; | |
344 | drv_change_chanctx(local, ctx, IEEE80211_CHANCTX_CHANGE_WIDTH); | |
21f659bf | 345 | ieee80211_recalc_chanctx_min_def(local, ctx); |
55de908a JB |
346 | |
347 | if (!local->use_chanctx) { | |
675a0b04 | 348 | local->_oper_chandef = *chandef; |
55de908a JB |
349 | ieee80211_hw_config(local, 0); |
350 | } | |
0aaffa9b | 351 | } |
d01a1e65 MK |
352 | |
353 | static struct ieee80211_chanctx * | |
354 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 355 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
356 | enum ieee80211_chanctx_mode mode) |
357 | { | |
358 | struct ieee80211_chanctx *ctx; | |
359 | ||
360 | lockdep_assert_held(&local->chanctx_mtx); | |
361 | ||
362 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
363 | return NULL; | |
d01a1e65 MK |
364 | |
365 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 366 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 367 | |
5bcae31d MK |
368 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
369 | continue; | |
370 | ||
d01a1e65 MK |
371 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
372 | continue; | |
4bf88530 JB |
373 | |
374 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
375 | if (!compat) | |
d01a1e65 MK |
376 | continue; |
377 | ||
0288157b MK |
378 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
379 | compat); | |
380 | if (!compat) | |
381 | continue; | |
382 | ||
18942d3b | 383 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 | 384 | |
d01a1e65 MK |
385 | return ctx; |
386 | } | |
387 | ||
388 | return NULL; | |
389 | } | |
390 | ||
e4746851 SW |
391 | static bool ieee80211_is_radar_required(struct ieee80211_local *local) |
392 | { | |
393 | struct ieee80211_sub_if_data *sdata; | |
394 | ||
cc901de1 MK |
395 | lockdep_assert_held(&local->mtx); |
396 | ||
e4746851 SW |
397 | rcu_read_lock(); |
398 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
399 | if (sdata->radar_required) { | |
400 | rcu_read_unlock(); | |
401 | return true; | |
402 | } | |
403 | } | |
404 | rcu_read_unlock(); | |
405 | ||
406 | return false; | |
407 | } | |
408 | ||
d01a1e65 | 409 | static struct ieee80211_chanctx * |
ed68ebca MK |
410 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
411 | const struct cfg80211_chan_def *chandef, | |
412 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
413 | { |
414 | struct ieee80211_chanctx *ctx; | |
415 | ||
416 | lockdep_assert_held(&local->chanctx_mtx); | |
417 | ||
418 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
419 | if (!ctx) | |
ed68ebca | 420 | return NULL; |
d01a1e65 | 421 | |
484298ad | 422 | INIT_LIST_HEAD(&ctx->assigned_vifs); |
e3afb920 | 423 | INIT_LIST_HEAD(&ctx->reserved_vifs); |
4bf88530 | 424 | ctx->conf.def = *chandef; |
04ecd257 JB |
425 | ctx->conf.rx_chains_static = 1; |
426 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 427 | ctx->mode = mode; |
e4746851 | 428 | ctx->conf.radar_enabled = ieee80211_is_radar_required(local); |
21f659bf | 429 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
430 | |
431 | return ctx; | |
432 | } | |
433 | ||
434 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
435 | struct ieee80211_chanctx *ctx) | |
436 | { | |
437 | u32 changed; | |
438 | int err; | |
439 | ||
440 | lockdep_assert_held(&local->mtx); | |
441 | lockdep_assert_held(&local->chanctx_mtx); | |
442 | ||
e4746851 SW |
443 | if (!local->use_chanctx) |
444 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 445 | |
382a103b JB |
446 | /* turn idle off *before* setting channel -- some drivers need that */ |
447 | changed = ieee80211_idle_off(local); | |
448 | if (changed) | |
449 | ieee80211_hw_config(local, changed); | |
450 | ||
55de908a | 451 | if (!local->use_chanctx) { |
ed68ebca | 452 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 453 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
454 | } else { |
455 | err = drv_add_chanctx(local, ctx); | |
456 | if (err) { | |
382a103b | 457 | ieee80211_recalc_idle(local); |
ed68ebca | 458 | return err; |
55de908a | 459 | } |
35f2fce9 MK |
460 | } |
461 | ||
ed68ebca MK |
462 | return 0; |
463 | } | |
464 | ||
465 | static struct ieee80211_chanctx * | |
466 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
467 | const struct cfg80211_chan_def *chandef, | |
468 | enum ieee80211_chanctx_mode mode) | |
469 | { | |
470 | struct ieee80211_chanctx *ctx; | |
471 | int err; | |
d01a1e65 | 472 | |
ed68ebca MK |
473 | lockdep_assert_held(&local->mtx); |
474 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 475 | |
ed68ebca MK |
476 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
477 | if (!ctx) | |
478 | return ERR_PTR(-ENOMEM); | |
479 | ||
480 | err = ieee80211_add_chanctx(local, ctx); | |
481 | if (err) { | |
482 | kfree(ctx); | |
483 | return ERR_PTR(err); | |
484 | } | |
485 | ||
486 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
487 | return ctx; |
488 | } | |
489 | ||
1f0d54cd MK |
490 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
491 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
492 | { |
493 | lockdep_assert_held(&local->chanctx_mtx); | |
494 | ||
55de908a | 495 | if (!local->use_chanctx) { |
675a0b04 KB |
496 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
497 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
498 | chandef->center_freq1 = chandef->chan->center_freq; | |
499 | chandef->center_freq2 = 0; | |
e4746851 SW |
500 | |
501 | /* NOTE: Disabling radar is only valid here for | |
502 | * single channel context. To be sure, check it ... | |
503 | */ | |
1f0d54cd MK |
504 | WARN_ON(local->hw.conf.radar_enabled && |
505 | !list_empty(&local->chanctx_list)); | |
506 | ||
e4746851 SW |
507 | local->hw.conf.radar_enabled = false; |
508 | ||
9b4816f5 | 509 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
510 | } else { |
511 | drv_remove_chanctx(local, ctx); | |
512 | } | |
35f2fce9 | 513 | |
fd0f979a | 514 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
515 | } |
516 | ||
1f0d54cd MK |
517 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
518 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 519 | { |
d01a1e65 MK |
520 | lockdep_assert_held(&local->chanctx_mtx); |
521 | ||
c0166da9 | 522 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 523 | |
1f0d54cd MK |
524 | list_del_rcu(&ctx->list); |
525 | ieee80211_del_chanctx(local, ctx); | |
526 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
527 | } |
528 | ||
4bf88530 JB |
529 | static void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
530 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
531 | { |
532 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
533 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 534 | const struct cfg80211_chan_def *compat = NULL; |
e89a96f5 MK |
535 | |
536 | lockdep_assert_held(&local->chanctx_mtx); | |
537 | ||
538 | rcu_read_lock(); | |
539 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
4bf88530 | 540 | |
e89a96f5 MK |
541 | if (!ieee80211_sdata_running(sdata)) |
542 | continue; | |
543 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != conf) | |
544 | continue; | |
0e67c136 FF |
545 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
546 | continue; | |
e89a96f5 | 547 | |
4bf88530 JB |
548 | if (!compat) |
549 | compat = &sdata->vif.bss_conf.chandef; | |
550 | ||
551 | compat = cfg80211_chandef_compatible( | |
552 | &sdata->vif.bss_conf.chandef, compat); | |
a00f4f6e | 553 | if (WARN_ON_ONCE(!compat)) |
4bf88530 | 554 | break; |
e89a96f5 MK |
555 | } |
556 | rcu_read_unlock(); | |
557 | ||
a00f4f6e | 558 | if (!compat) |
4bf88530 | 559 | return; |
e89a96f5 | 560 | |
18942d3b | 561 | ieee80211_change_chanctx(local, ctx, compat); |
e89a96f5 MK |
562 | } |
563 | ||
367bbd10 JB |
564 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
565 | struct ieee80211_chanctx *chanctx) | |
566 | { | |
567 | bool radar_enabled; | |
568 | ||
569 | lockdep_assert_held(&local->chanctx_mtx); | |
34a3740d JB |
570 | /* for setting local->radar_detect_enabled */ |
571 | lockdep_assert_held(&local->mtx); | |
367bbd10 JB |
572 | |
573 | radar_enabled = ieee80211_is_radar_required(local); | |
574 | ||
575 | if (radar_enabled == chanctx->conf.radar_enabled) | |
576 | return; | |
577 | ||
578 | chanctx->conf.radar_enabled = radar_enabled; | |
579 | local->radar_detect_enabled = chanctx->conf.radar_enabled; | |
580 | ||
581 | if (!local->use_chanctx) { | |
582 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
583 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
584 | } | |
585 | ||
586 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
587 | } | |
588 | ||
77eeba97 LC |
589 | static int ieee80211_assign_vif_chanctx(struct ieee80211_sub_if_data *sdata, |
590 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 591 | { |
35f2fce9 | 592 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
593 | struct ieee80211_chanctx_conf *conf; |
594 | struct ieee80211_chanctx *curr_ctx = NULL; | |
595 | int ret = 0; | |
d01a1e65 | 596 | |
77eeba97 LC |
597 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, |
598 | lockdep_is_held(&local->chanctx_mtx)); | |
d01a1e65 | 599 | |
77eeba97 LC |
600 | if (conf) { |
601 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 602 | |
77eeba97 LC |
603 | drv_unassign_vif_chanctx(local, sdata, curr_ctx); |
604 | conf = NULL; | |
484298ad | 605 | list_del(&sdata->assigned_chanctx_list); |
77eeba97 | 606 | } |
5bbe754d | 607 | |
77eeba97 LC |
608 | if (new_ctx) { |
609 | ret = drv_assign_vif_chanctx(local, sdata, new_ctx); | |
610 | if (ret) | |
611 | goto out; | |
fd0f979a | 612 | |
77eeba97 | 613 | conf = &new_ctx->conf; |
484298ad MK |
614 | list_add(&sdata->assigned_chanctx_list, |
615 | &new_ctx->assigned_vifs); | |
77eeba97 | 616 | } |
e89a96f5 | 617 | |
77eeba97 LC |
618 | out: |
619 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
fd0f979a | 620 | |
77eeba97 LC |
621 | sdata->vif.bss_conf.idle = !conf; |
622 | ||
c0166da9 | 623 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
624 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
625 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
626 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
627 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 628 | } |
e89a96f5 | 629 | |
c0166da9 | 630 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
77eeba97 LC |
631 | ieee80211_recalc_txpower(sdata); |
632 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
04ecd257 | 633 | } |
77eeba97 LC |
634 | |
635 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
636 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
637 | ieee80211_bss_info_change_notify(sdata, | |
638 | BSS_CHANGED_IDLE); | |
639 | ||
640 | return ret; | |
d01a1e65 MK |
641 | } |
642 | ||
04ecd257 JB |
643 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
644 | struct ieee80211_chanctx *chanctx) | |
645 | { | |
646 | struct ieee80211_sub_if_data *sdata; | |
647 | u8 rx_chains_static, rx_chains_dynamic; | |
648 | ||
649 | lockdep_assert_held(&local->chanctx_mtx); | |
650 | ||
651 | rx_chains_static = 1; | |
652 | rx_chains_dynamic = 1; | |
653 | ||
654 | rcu_read_lock(); | |
655 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
656 | u8 needed_static, needed_dynamic; | |
657 | ||
658 | if (!ieee80211_sdata_running(sdata)) | |
659 | continue; | |
660 | ||
661 | if (rcu_access_pointer(sdata->vif.chanctx_conf) != | |
662 | &chanctx->conf) | |
663 | continue; | |
664 | ||
665 | switch (sdata->vif.type) { | |
666 | case NL80211_IFTYPE_P2P_DEVICE: | |
667 | continue; | |
668 | case NL80211_IFTYPE_STATION: | |
669 | if (!sdata->u.mgd.associated) | |
670 | continue; | |
671 | break; | |
672 | case NL80211_IFTYPE_AP_VLAN: | |
673 | continue; | |
674 | case NL80211_IFTYPE_AP: | |
675 | case NL80211_IFTYPE_ADHOC: | |
676 | case NL80211_IFTYPE_WDS: | |
677 | case NL80211_IFTYPE_MESH_POINT: | |
239281f8 | 678 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
679 | break; |
680 | default: | |
681 | WARN_ON_ONCE(1); | |
682 | } | |
683 | ||
684 | switch (sdata->smps_mode) { | |
685 | default: | |
686 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
687 | sdata->smps_mode); | |
688 | /* fall through */ | |
689 | case IEEE80211_SMPS_OFF: | |
690 | needed_static = sdata->needed_rx_chains; | |
691 | needed_dynamic = sdata->needed_rx_chains; | |
692 | break; | |
693 | case IEEE80211_SMPS_DYNAMIC: | |
694 | needed_static = 1; | |
695 | needed_dynamic = sdata->needed_rx_chains; | |
696 | break; | |
697 | case IEEE80211_SMPS_STATIC: | |
698 | needed_static = 1; | |
699 | needed_dynamic = 1; | |
700 | break; | |
701 | } | |
702 | ||
703 | rx_chains_static = max(rx_chains_static, needed_static); | |
704 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
705 | } | |
7b8a9cdd IY |
706 | |
707 | /* Disable SMPS for the monitor interface */ | |
708 | sdata = rcu_dereference(local->monitor_sdata); | |
709 | if (sdata && | |
710 | rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf) | |
711 | rx_chains_dynamic = rx_chains_static = local->rx_chains; | |
712 | ||
04ecd257 JB |
713 | rcu_read_unlock(); |
714 | ||
715 | if (!local->use_chanctx) { | |
716 | if (rx_chains_static > 1) | |
717 | local->smps_mode = IEEE80211_SMPS_OFF; | |
718 | else if (rx_chains_dynamic > 1) | |
719 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
720 | else | |
721 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
722 | ieee80211_hw_config(local, 0); | |
723 | } | |
724 | ||
725 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
726 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
727 | return; | |
728 | ||
729 | chanctx->conf.rx_chains_static = rx_chains_static; | |
730 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
731 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
732 | } | |
733 | ||
11335a55 LC |
734 | static void |
735 | __ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
736 | bool clear) | |
737 | { | |
33926eb7 | 738 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
739 | struct ieee80211_sub_if_data *vlan; |
740 | struct ieee80211_chanctx_conf *conf; | |
741 | ||
742 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
743 | return; | |
744 | ||
745 | lockdep_assert_held(&local->mtx); | |
746 | ||
747 | /* Check that conf exists, even when clearing this function | |
748 | * must be called with the AP's channel context still there | |
749 | * as it would otherwise cause VLANs to have an invalid | |
750 | * channel context pointer for a while, possibly pointing | |
751 | * to a channel context that has already been freed. | |
752 | */ | |
753 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
33926eb7 | 754 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
755 | WARN_ON(!conf); |
756 | ||
757 | if (clear) | |
758 | conf = NULL; | |
759 | ||
760 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
761 | rcu_assign_pointer(vlan->vif.chanctx_conf, conf); | |
762 | } | |
763 | ||
764 | void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata, | |
765 | bool clear) | |
766 | { | |
767 | struct ieee80211_local *local = sdata->local; | |
768 | ||
769 | mutex_lock(&local->chanctx_mtx); | |
770 | ||
771 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, clear); | |
772 | ||
773 | mutex_unlock(&local->chanctx_mtx); | |
774 | } | |
775 | ||
776 | int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata) | |
777 | { | |
e3afb920 MK |
778 | struct ieee80211_chanctx *ctx = sdata->reserved_chanctx; |
779 | ||
11335a55 LC |
780 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
781 | ||
e3afb920 | 782 | if (WARN_ON(!ctx)) |
73da7d5b SW |
783 | return -EINVAL; |
784 | ||
e3afb920 | 785 | list_del(&sdata->reserved_chanctx_list); |
11335a55 LC |
786 | sdata->reserved_chanctx = NULL; |
787 | ||
5bcae31d MK |
788 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
789 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
790 | if (WARN_ON(!ctx->replace_ctx)) | |
791 | return -EINVAL; | |
792 | ||
793 | WARN_ON(ctx->replace_ctx->replace_state != | |
794 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
795 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
796 | ||
797 | ctx->replace_ctx->replace_ctx = NULL; | |
798 | ctx->replace_ctx->replace_state = | |
799 | IEEE80211_CHANCTX_REPLACE_NONE; | |
800 | ||
801 | list_del_rcu(&ctx->list); | |
802 | kfree_rcu(ctx, rcu_head); | |
803 | } else { | |
804 | ieee80211_free_chanctx(sdata->local, ctx); | |
805 | } | |
806 | } | |
e3afb920 | 807 | |
11335a55 LC |
808 | return 0; |
809 | } | |
810 | ||
811 | int ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata, | |
812 | const struct cfg80211_chan_def *chandef, | |
09332481 MK |
813 | enum ieee80211_chanctx_mode mode, |
814 | bool radar_required) | |
11335a55 LC |
815 | { |
816 | struct ieee80211_local *local = sdata->local; | |
5bcae31d | 817 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 818 | |
5bcae31d | 819 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 820 | |
5bcae31d MK |
821 | curr_ctx = ieee80211_vif_get_chanctx(sdata); |
822 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) | |
823 | return -ENOTSUPP; | |
11335a55 | 824 | |
13f348a8 | 825 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 826 | if (!new_ctx) { |
5bcae31d | 827 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 828 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
829 | if (IS_ERR(new_ctx)) |
830 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 831 | } else { |
5bcae31d MK |
832 | if (!curr_ctx || |
833 | (curr_ctx->replace_state == | |
834 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
835 | !list_empty(&curr_ctx->reserved_vifs)) { | |
836 | /* | |
837 | * Another vif already requested this context | |
838 | * for a reservation. Find another one hoping | |
839 | * all vifs assigned to it will also switch | |
840 | * soon enough. | |
841 | * | |
842 | * TODO: This needs a little more work as some | |
843 | * cases (more than 2 chanctx capable devices) | |
844 | * may fail which could otherwise succeed | |
845 | * provided some channel context juggling was | |
846 | * performed. | |
847 | * | |
848 | * Consider ctx1..3, vif1..6, each ctx has 2 | |
849 | * vifs. vif1 and vif2 from ctx1 request new | |
850 | * different chandefs starting 2 in-place | |
851 | * reserations with ctx4 and ctx5 replacing | |
852 | * ctx1 and ctx2 respectively. Next vif5 and | |
853 | * vif6 from ctx3 reserve ctx4. If vif3 and | |
854 | * vif4 remain on ctx2 as they are then this | |
855 | * fails unless `replace_ctx` from ctx5 is | |
856 | * replaced with ctx3. | |
857 | */ | |
858 | list_for_each_entry(ctx, &local->chanctx_list, | |
859 | list) { | |
860 | if (ctx->replace_state != | |
861 | IEEE80211_CHANCTX_REPLACE_NONE) | |
862 | continue; | |
863 | ||
864 | if (!list_empty(&ctx->reserved_vifs)) | |
865 | continue; | |
866 | ||
867 | curr_ctx = ctx; | |
868 | break; | |
869 | } | |
870 | } | |
871 | ||
872 | /* | |
873 | * If that's true then all available contexts already | |
874 | * have reservations and cannot be used. | |
875 | */ | |
876 | if (!curr_ctx || | |
877 | (curr_ctx->replace_state == | |
878 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
879 | !list_empty(&curr_ctx->reserved_vifs)) | |
880 | return -EBUSY; | |
881 | ||
882 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
883 | if (!new_ctx) | |
884 | return -ENOMEM; | |
885 | ||
886 | new_ctx->replace_ctx = curr_ctx; | |
887 | new_ctx->replace_state = | |
888 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
889 | ||
890 | curr_ctx->replace_ctx = new_ctx; | |
891 | curr_ctx->replace_state = | |
892 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
893 | ||
894 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
895 | } |
896 | } | |
897 | ||
e3afb920 | 898 | list_add(&sdata->reserved_chanctx_list, &new_ctx->reserved_vifs); |
11335a55 LC |
899 | sdata->reserved_chanctx = new_ctx; |
900 | sdata->reserved_chandef = *chandef; | |
09332481 | 901 | sdata->reserved_radar_required = radar_required; |
5bcae31d MK |
902 | sdata->reserved_ready = false; |
903 | ||
904 | return 0; | |
11335a55 LC |
905 | } |
906 | ||
03078de4 MK |
907 | static void |
908 | ieee80211_vif_chanctx_reservation_complete(struct ieee80211_sub_if_data *sdata) | |
909 | { | |
910 | switch (sdata->vif.type) { | |
911 | case NL80211_IFTYPE_ADHOC: | |
912 | case NL80211_IFTYPE_AP: | |
913 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 914 | case NL80211_IFTYPE_OCB: |
03078de4 MK |
915 | ieee80211_queue_work(&sdata->local->hw, |
916 | &sdata->csa_finalize_work); | |
917 | break; | |
03078de4 | 918 | case NL80211_IFTYPE_STATION: |
4c3ebc56 MK |
919 | ieee80211_queue_work(&sdata->local->hw, |
920 | &sdata->u.mgd.chswitch_work); | |
921 | break; | |
922 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
923 | case NL80211_IFTYPE_AP_VLAN: |
924 | case NL80211_IFTYPE_WDS: | |
925 | case NL80211_IFTYPE_MONITOR: | |
926 | case NL80211_IFTYPE_P2P_CLIENT: | |
927 | case NL80211_IFTYPE_P2P_GO: | |
928 | case NL80211_IFTYPE_P2P_DEVICE: | |
929 | case NUM_NL80211_IFTYPES: | |
930 | WARN_ON(1); | |
931 | break; | |
932 | } | |
933 | } | |
934 | ||
2967e031 FF |
935 | static void |
936 | ieee80211_vif_update_chandef(struct ieee80211_sub_if_data *sdata, | |
937 | const struct cfg80211_chan_def *chandef) | |
938 | { | |
939 | struct ieee80211_sub_if_data *vlan; | |
940 | ||
941 | sdata->vif.bss_conf.chandef = *chandef; | |
942 | ||
943 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
944 | return; | |
945 | ||
946 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) | |
947 | vlan->vif.bss_conf.chandef = *chandef; | |
948 | } | |
949 | ||
5bcae31d MK |
950 | static int |
951 | ieee80211_vif_use_reserved_reassign(struct ieee80211_sub_if_data *sdata) | |
11335a55 LC |
952 | { |
953 | struct ieee80211_local *local = sdata->local; | |
5bcae31d MK |
954 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
955 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
956 | const struct cfg80211_chan_def *chandef; | |
957 | u32 changed = 0; | |
958 | int err; | |
11335a55 LC |
959 | |
960 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 961 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 962 | |
5bcae31d MK |
963 | new_ctx = sdata->reserved_chanctx; |
964 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
11335a55 | 965 | |
5bcae31d MK |
966 | if (WARN_ON(!sdata->reserved_ready)) |
967 | return -EBUSY; | |
73da7d5b | 968 | |
5bcae31d MK |
969 | if (WARN_ON(!new_ctx)) |
970 | return -EINVAL; | |
971 | ||
972 | if (WARN_ON(!old_ctx)) | |
973 | return -EINVAL; | |
974 | ||
975 | if (WARN_ON(new_ctx->replace_state == | |
976 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
977 | return -EINVAL; | |
978 | ||
979 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
980 | &sdata->reserved_chandef); | |
981 | if (WARN_ON(!chandef)) | |
982 | return -EINVAL; | |
983 | ||
984 | vif_chsw[0].vif = &sdata->vif; | |
985 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
986 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
987 | ||
988 | list_del(&sdata->reserved_chanctx_list); | |
989 | sdata->reserved_chanctx = NULL; | |
990 | ||
991 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
992 | CHANCTX_SWMODE_REASSIGN_VIF); | |
993 | if (err) { | |
994 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
995 | ieee80211_free_chanctx(local, new_ctx); | |
996 | ||
03078de4 | 997 | goto out; |
73da7d5b SW |
998 | } |
999 | ||
5bcae31d MK |
1000 | list_move(&sdata->assigned_chanctx_list, &new_ctx->assigned_vifs); |
1001 | rcu_assign_pointer(sdata->vif.chanctx_conf, &new_ctx->conf); | |
1002 | ||
1003 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1004 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, false); | |
1005 | ||
1006 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) | |
1007 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1008 | |
11335a55 | 1009 | if (sdata->vif.bss_conf.chandef.width != sdata->reserved_chandef.width) |
5bcae31d | 1010 | changed = BSS_CHANGED_BANDWIDTH; |
11335a55 | 1011 | |
2967e031 | 1012 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
11335a55 | 1013 | |
722ddb0d EG |
1014 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1015 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
1016 | ieee80211_recalc_chanctx_min_def(local, new_ctx); | |
1017 | ||
5bcae31d MK |
1018 | if (changed) |
1019 | ieee80211_bss_info_change_notify(sdata, changed); | |
1020 | ||
03078de4 MK |
1021 | out: |
1022 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1023 | return err; |
1024 | } | |
1025 | ||
1026 | static int | |
1027 | ieee80211_vif_use_reserved_assign(struct ieee80211_sub_if_data *sdata) | |
1028 | { | |
1029 | struct ieee80211_local *local = sdata->local; | |
1030 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1031 | const struct cfg80211_chan_def *chandef; | |
1032 | int err; | |
1033 | ||
1034 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1035 | new_ctx = sdata->reserved_chanctx; | |
1036 | ||
1037 | if (WARN_ON(!sdata->reserved_ready)) | |
1038 | return -EINVAL; | |
1039 | ||
1040 | if (WARN_ON(old_ctx)) | |
1041 | return -EINVAL; | |
1042 | ||
1043 | if (WARN_ON(!new_ctx)) | |
1044 | return -EINVAL; | |
1045 | ||
1046 | if (WARN_ON(new_ctx->replace_state == | |
1047 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1048 | return -EINVAL; | |
1049 | ||
1050 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
1051 | &sdata->reserved_chandef); | |
1052 | if (WARN_ON(!chandef)) | |
1053 | return -EINVAL; | |
1054 | ||
e3afb920 | 1055 | list_del(&sdata->reserved_chanctx_list); |
5bcae31d | 1056 | sdata->reserved_chanctx = NULL; |
11335a55 | 1057 | |
5bcae31d MK |
1058 | err = ieee80211_assign_vif_chanctx(sdata, new_ctx); |
1059 | if (err) { | |
1060 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1061 | ieee80211_free_chanctx(local, new_ctx); | |
1062 | ||
1063 | goto out; | |
1064 | } | |
1065 | ||
1066 | out: | |
03078de4 | 1067 | ieee80211_vif_chanctx_reservation_complete(sdata); |
5bcae31d MK |
1068 | return err; |
1069 | } | |
1070 | ||
1071 | static bool | |
1072 | ieee80211_vif_has_in_place_reservation(struct ieee80211_sub_if_data *sdata) | |
1073 | { | |
1074 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1075 | ||
1076 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1077 | ||
1078 | new_ctx = sdata->reserved_chanctx; | |
1079 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1080 | ||
1081 | if (!old_ctx) | |
1082 | return false; | |
1083 | ||
1084 | if (WARN_ON(!new_ctx)) | |
1085 | return false; | |
1086 | ||
1087 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1088 | return false; | |
1089 | ||
1090 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1091 | return false; | |
1092 | ||
1093 | return true; | |
1094 | } | |
1095 | ||
1096 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1097 | struct ieee80211_chanctx *new_ctx) | |
1098 | { | |
1099 | const struct cfg80211_chan_def *chandef; | |
1100 | ||
1101 | lockdep_assert_held(&local->mtx); | |
1102 | lockdep_assert_held(&local->chanctx_mtx); | |
1103 | ||
1104 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1105 | if (WARN_ON(!chandef)) | |
1106 | return -EINVAL; | |
1107 | ||
1108 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1109 | local->_oper_chandef = *chandef; | |
1110 | ieee80211_hw_config(local, 0); | |
1111 | ||
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1116 | int n_vifs) | |
1117 | { | |
1118 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
1119 | struct ieee80211_sub_if_data *sdata; | |
1120 | struct ieee80211_chanctx *ctx, *old_ctx; | |
1121 | int i, err; | |
1122 | ||
1123 | lockdep_assert_held(&local->mtx); | |
1124 | lockdep_assert_held(&local->chanctx_mtx); | |
1125 | ||
1126 | vif_chsw = kzalloc(sizeof(vif_chsw[0]) * n_vifs, GFP_KERNEL); | |
1127 | if (!vif_chsw) | |
1128 | return -ENOMEM; | |
1129 | ||
1130 | i = 0; | |
1131 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1132 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1133 | continue; | |
1134 | ||
1135 | if (WARN_ON(!ctx->replace_ctx)) { | |
1136 | err = -EINVAL; | |
5d52ee81 LC |
1137 | goto out; |
1138 | } | |
11335a55 | 1139 | |
5bcae31d MK |
1140 | list_for_each_entry(sdata, &ctx->reserved_vifs, |
1141 | reserved_chanctx_list) { | |
1142 | if (!ieee80211_vif_has_in_place_reservation( | |
1143 | sdata)) | |
1144 | continue; | |
1145 | ||
1146 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1147 | vif_chsw[i].vif = &sdata->vif; | |
1148 | vif_chsw[i].old_ctx = &old_ctx->conf; | |
1149 | vif_chsw[i].new_ctx = &ctx->conf; | |
1150 | ||
1151 | i++; | |
1152 | } | |
5d52ee81 | 1153 | } |
11335a55 | 1154 | |
5bcae31d MK |
1155 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1156 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1157 | |
11335a55 | 1158 | out: |
5bcae31d MK |
1159 | kfree(vif_chsw); |
1160 | return err; | |
1161 | } | |
1162 | ||
1163 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1164 | { | |
1165 | struct ieee80211_chanctx *ctx; | |
1166 | int err; | |
1167 | ||
1168 | lockdep_assert_held(&local->mtx); | |
1169 | lockdep_assert_held(&local->chanctx_mtx); | |
1170 | ||
1171 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1172 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1173 | continue; | |
1174 | ||
1175 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1176 | continue; | |
1177 | ||
1178 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1179 | err = ieee80211_add_chanctx(local, ctx); | |
1180 | if (err) | |
1181 | goto err; | |
1182 | } | |
1183 | ||
1184 | return 0; | |
1185 | ||
1186 | err: | |
1187 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1188 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1189 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1190 | continue; | |
1191 | ||
1192 | if (!list_empty(&ctx->replace_ctx->assigned_vifs)) | |
1193 | continue; | |
1194 | ||
1195 | ieee80211_del_chanctx(local, ctx); | |
1196 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1197 | } | |
1198 | ||
1199 | return err; | |
1200 | } | |
1201 | ||
649b2a4d | 1202 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d MK |
1203 | { |
1204 | struct ieee80211_sub_if_data *sdata, *sdata_tmp; | |
1205 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; | |
1206 | struct ieee80211_chanctx *new_ctx = NULL; | |
1207 | int i, err, n_assigned, n_reserved, n_ready; | |
1208 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; | |
1209 | ||
1210 | lockdep_assert_held(&local->mtx); | |
1211 | lockdep_assert_held(&local->chanctx_mtx); | |
1212 | ||
1213 | /* | |
1214 | * If there are 2 independent pairs of channel contexts performing | |
1215 | * cross-switch of their vifs this code will still wait until both are | |
1216 | * ready even though it could be possible to switch one before the | |
1217 | * other is ready. | |
1218 | * | |
1219 | * For practical reasons and code simplicity just do a single huge | |
1220 | * switch. | |
1221 | */ | |
1222 | ||
1223 | /* | |
1224 | * Verify if the reservation is still feasible. | |
1225 | * - if it's not then disconnect | |
1226 | * - if it is but not all vifs necessary are ready then defer | |
1227 | */ | |
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 (WARN_ON(!ctx->replace_ctx)) { | |
1234 | err = -EINVAL; | |
1235 | goto err; | |
1236 | } | |
1237 | ||
1238 | if (!local->use_chanctx) | |
1239 | new_ctx = ctx; | |
1240 | ||
1241 | n_ctx++; | |
1242 | ||
1243 | n_assigned = 0; | |
1244 | n_reserved = 0; | |
1245 | n_ready = 0; | |
1246 | ||
1247 | list_for_each_entry(sdata, &ctx->replace_ctx->assigned_vifs, | |
1248 | assigned_chanctx_list) { | |
1249 | n_assigned++; | |
1250 | if (sdata->reserved_chanctx) { | |
1251 | n_reserved++; | |
1252 | if (sdata->reserved_ready) | |
1253 | n_ready++; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | if (n_assigned != n_reserved) { | |
1258 | if (n_ready == n_reserved) { | |
1259 | wiphy_info(local->hw.wiphy, | |
1260 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1261 | err = -EBUSY; | |
1262 | goto err; | |
1263 | } | |
1264 | ||
1265 | return -EAGAIN; | |
1266 | } | |
1267 | ||
1268 | ctx->conf.radar_enabled = false; | |
1269 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1270 | reserved_chanctx_list) { | |
1271 | if (ieee80211_vif_has_in_place_reservation(sdata) && | |
1272 | !sdata->reserved_ready) | |
1273 | return -EAGAIN; | |
1274 | ||
1275 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1276 | if (old_ctx) { | |
1277 | if (old_ctx->replace_state == | |
1278 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1279 | n_vifs_switch++; | |
1280 | else | |
1281 | n_vifs_assign++; | |
1282 | } else { | |
1283 | n_vifs_ctxless++; | |
1284 | } | |
1285 | ||
1286 | if (sdata->reserved_radar_required) | |
1287 | ctx->conf.radar_enabled = true; | |
1288 | } | |
1289 | } | |
1290 | ||
1291 | if (WARN_ON(n_ctx == 0) || | |
1292 | WARN_ON(n_vifs_switch == 0 && | |
1293 | n_vifs_assign == 0 && | |
1294 | n_vifs_ctxless == 0) || | |
1295 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1296 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1297 | err = -EINVAL; | |
1298 | goto err; | |
1299 | } | |
1300 | ||
1301 | /* | |
1302 | * All necessary vifs are ready. Perform the switch now depending on | |
1303 | * reservations and driver capabilities. | |
1304 | */ | |
1305 | ||
1306 | if (local->use_chanctx) { | |
1307 | if (n_vifs_switch > 0) { | |
1308 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1309 | if (err) | |
1310 | goto err; | |
1311 | } | |
1312 | ||
1313 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1314 | err = ieee80211_chsw_switch_ctxs(local); | |
1315 | if (err) | |
1316 | goto err; | |
1317 | } | |
1318 | } else { | |
1319 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1320 | if (err) | |
1321 | goto err; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Update all structures, values and pointers to point to new channel | |
1326 | * context(s). | |
1327 | */ | |
1328 | ||
1329 | i = 0; | |
1330 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1331 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1332 | continue; | |
1333 | ||
1334 | if (WARN_ON(!ctx->replace_ctx)) { | |
1335 | err = -EINVAL; | |
1336 | goto err; | |
1337 | } | |
1338 | ||
1339 | list_for_each_entry(sdata, &ctx->reserved_vifs, | |
1340 | reserved_chanctx_list) { | |
1341 | u32 changed = 0; | |
1342 | ||
1343 | if (!ieee80211_vif_has_in_place_reservation(sdata)) | |
1344 | continue; | |
1345 | ||
1346 | rcu_assign_pointer(sdata->vif.chanctx_conf, &ctx->conf); | |
1347 | ||
1348 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
1349 | __ieee80211_vif_copy_chanctx_to_vlans(sdata, | |
1350 | false); | |
1351 | ||
1352 | sdata->radar_required = sdata->reserved_radar_required; | |
1353 | ||
1354 | if (sdata->vif.bss_conf.chandef.width != | |
1355 | sdata->reserved_chandef.width) | |
1356 | changed = BSS_CHANGED_BANDWIDTH; | |
1357 | ||
2967e031 | 1358 | ieee80211_vif_update_chandef(sdata, &sdata->reserved_chandef); |
5bcae31d MK |
1359 | if (changed) |
1360 | ieee80211_bss_info_change_notify(sdata, | |
1361 | changed); | |
1362 | ||
1363 | ieee80211_recalc_txpower(sdata); | |
1364 | } | |
1365 | ||
1366 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1367 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1368 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1369 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1370 | ||
1371 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1372 | reserved_chanctx_list) { | |
1373 | if (ieee80211_vif_get_chanctx(sdata) != ctx) | |
1374 | continue; | |
1375 | ||
1376 | list_del(&sdata->reserved_chanctx_list); | |
1377 | list_move(&sdata->assigned_chanctx_list, | |
47e4df94 | 1378 | &ctx->assigned_vifs); |
5bcae31d | 1379 | sdata->reserved_chanctx = NULL; |
03078de4 MK |
1380 | |
1381 | ieee80211_vif_chanctx_reservation_complete(sdata); | |
5bcae31d MK |
1382 | } |
1383 | ||
1384 | /* | |
1385 | * This context might have been a dependency for an already | |
1386 | * ready re-assign reservation interface that was deferred. Do | |
1387 | * not propagate error to the caller though. The in-place | |
1388 | * reservation for originally requested interface has already | |
1389 | * succeeded at this point. | |
1390 | */ | |
1391 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
1392 | reserved_chanctx_list) { | |
1393 | if (WARN_ON(ieee80211_vif_has_in_place_reservation( | |
1394 | sdata))) | |
1395 | continue; | |
1396 | ||
1397 | if (WARN_ON(sdata->reserved_chanctx != ctx)) | |
1398 | continue; | |
1399 | ||
1400 | if (!sdata->reserved_ready) | |
1401 | continue; | |
1402 | ||
1403 | if (ieee80211_vif_get_chanctx(sdata)) | |
1404 | err = ieee80211_vif_use_reserved_reassign( | |
1405 | sdata); | |
1406 | else | |
1407 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1408 | ||
1409 | if (err) { | |
1410 | sdata_info(sdata, | |
1411 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1412 | err); | |
1413 | ieee80211_vif_unreserve_chanctx(sdata); | |
1414 | cfg80211_stop_iface(local->hw.wiphy, | |
1415 | &sdata->wdev, | |
1416 | GFP_KERNEL); | |
1417 | } | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Finally free old contexts | |
1423 | */ | |
1424 | ||
1425 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1426 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1427 | continue; | |
1428 | ||
1429 | ctx->replace_ctx->replace_ctx = NULL; | |
1430 | ctx->replace_ctx->replace_state = | |
1431 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1432 | ||
1433 | list_del_rcu(&ctx->list); | |
1434 | kfree_rcu(ctx, rcu_head); | |
1435 | } | |
1436 | ||
1437 | return 0; | |
1438 | ||
1439 | err: | |
1440 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1441 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1442 | continue; | |
1443 | ||
1444 | list_for_each_entry_safe(sdata, sdata_tmp, &ctx->reserved_vifs, | |
03078de4 | 1445 | reserved_chanctx_list) { |
5bcae31d | 1446 | ieee80211_vif_unreserve_chanctx(sdata); |
03078de4 MK |
1447 | ieee80211_vif_chanctx_reservation_complete(sdata); |
1448 | } | |
5bcae31d MK |
1449 | } |
1450 | ||
1451 | return err; | |
1452 | } | |
1453 | ||
649b2a4d JB |
1454 | static void __ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1455 | { | |
1456 | struct ieee80211_local *local = sdata->local; | |
1457 | struct ieee80211_chanctx_conf *conf; | |
1458 | struct ieee80211_chanctx *ctx; | |
1459 | bool use_reserved_switch = false; | |
1460 | ||
1461 | lockdep_assert_held(&local->chanctx_mtx); | |
1462 | ||
1463 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1464 | lockdep_is_held(&local->chanctx_mtx)); | |
1465 | if (!conf) | |
1466 | return; | |
1467 | ||
1468 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1469 | ||
1470 | if (sdata->reserved_chanctx) { | |
1471 | if (sdata->reserved_chanctx->replace_state == | |
1472 | IEEE80211_CHANCTX_REPLACES_OTHER && | |
1473 | ieee80211_chanctx_num_reserved(local, | |
1474 | sdata->reserved_chanctx) > 1) | |
1475 | use_reserved_switch = true; | |
1476 | ||
1477 | ieee80211_vif_unreserve_chanctx(sdata); | |
1478 | } | |
1479 | ||
1480 | ieee80211_assign_vif_chanctx(sdata, NULL); | |
1481 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1482 | ieee80211_free_chanctx(local, ctx); | |
1483 | ||
1484 | /* Unreserving may ready an in-place reservation. */ | |
1485 | if (use_reserved_switch) | |
1486 | ieee80211_vif_use_reserved_switch(local); | |
1487 | } | |
1488 | ||
1489 | int ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata, | |
1490 | const struct cfg80211_chan_def *chandef, | |
1491 | enum ieee80211_chanctx_mode mode) | |
1492 | { | |
1493 | struct ieee80211_local *local = sdata->local; | |
1494 | struct ieee80211_chanctx *ctx; | |
1495 | u8 radar_detect_width = 0; | |
1496 | int ret; | |
1497 | ||
1498 | lockdep_assert_held(&local->mtx); | |
1499 | ||
1500 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); | |
1501 | ||
1502 | mutex_lock(&local->chanctx_mtx); | |
1503 | ||
1504 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1505 | chandef, | |
1506 | sdata->wdev.iftype); | |
1507 | if (ret < 0) | |
1508 | goto out; | |
1509 | if (ret > 0) | |
1510 | radar_detect_width = BIT(chandef->width); | |
1511 | ||
1512 | sdata->radar_required = ret; | |
1513 | ||
1514 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1515 | radar_detect_width); | |
1516 | if (ret < 0) | |
1517 | goto out; | |
1518 | ||
1519 | __ieee80211_vif_release_channel(sdata); | |
1520 | ||
1521 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1522 | if (!ctx) | |
1523 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1524 | if (IS_ERR(ctx)) { | |
1525 | ret = PTR_ERR(ctx); | |
1526 | goto out; | |
1527 | } | |
1528 | ||
2967e031 | 1529 | ieee80211_vif_update_chandef(sdata, chandef); |
649b2a4d JB |
1530 | |
1531 | ret = ieee80211_assign_vif_chanctx(sdata, ctx); | |
1532 | if (ret) { | |
1533 | /* if assign fails refcount stays the same */ | |
1534 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1535 | ieee80211_free_chanctx(local, ctx); | |
1536 | goto out; | |
1537 | } | |
1538 | ||
1539 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1540 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1541 | out: | |
1542 | mutex_unlock(&local->chanctx_mtx); | |
1543 | return ret; | |
1544 | } | |
1545 | ||
5bcae31d MK |
1546 | int ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata) |
1547 | { | |
1548 | struct ieee80211_local *local = sdata->local; | |
1549 | struct ieee80211_chanctx *new_ctx; | |
1550 | struct ieee80211_chanctx *old_ctx; | |
1551 | int err; | |
1552 | ||
1553 | lockdep_assert_held(&local->mtx); | |
1554 | lockdep_assert_held(&local->chanctx_mtx); | |
1555 | ||
1556 | new_ctx = sdata->reserved_chanctx; | |
1557 | old_ctx = ieee80211_vif_get_chanctx(sdata); | |
1558 | ||
1559 | if (WARN_ON(!new_ctx)) | |
1560 | return -EINVAL; | |
1561 | ||
1562 | if (WARN_ON(new_ctx->replace_state == | |
1563 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1564 | return -EINVAL; | |
1565 | ||
1566 | if (WARN_ON(sdata->reserved_ready)) | |
1567 | return -EINVAL; | |
1568 | ||
1569 | sdata->reserved_ready = true; | |
1570 | ||
1571 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1572 | if (old_ctx) | |
1573 | err = ieee80211_vif_use_reserved_reassign(sdata); | |
1574 | else | |
1575 | err = ieee80211_vif_use_reserved_assign(sdata); | |
1576 | ||
1577 | if (err) | |
1578 | return err; | |
1579 | } | |
1580 | ||
1581 | /* | |
1582 | * In-place reservation may need to be finalized now either if: | |
1583 | * a) sdata is taking part in the swapping itself and is the last one | |
1584 | * b) sdata has switched with a re-assign reservation to an existing | |
1585 | * context readying in-place switching of old_ctx | |
1586 | * | |
1587 | * In case of (b) do not propagate the error up because the requested | |
1588 | * sdata already switched successfully. Just spill an extra warning. | |
1589 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1590 | * interfaces upon failure. | |
1591 | */ | |
1592 | if ((old_ctx && | |
1593 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1594 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1595 | err = ieee80211_vif_use_reserved_switch(local); | |
1596 | if (err && err != -EAGAIN) { | |
1597 | if (new_ctx->replace_state == | |
1598 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1599 | return err; | |
1600 | ||
1601 | wiphy_info(local->hw.wiphy, | |
1602 | "depending in-place reservation failed (err=%d)\n", | |
1603 | err); | |
1604 | } | |
1605 | } | |
1606 | ||
1607 | return 0; | |
73da7d5b SW |
1608 | } |
1609 | ||
2c9b7359 JB |
1610 | int ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata, |
1611 | const struct cfg80211_chan_def *chandef, | |
1612 | u32 *changed) | |
1613 | { | |
1614 | struct ieee80211_local *local = sdata->local; | |
1615 | struct ieee80211_chanctx_conf *conf; | |
1616 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1617 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1618 | int ret; |
1619 | ||
1620 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1621 | IEEE80211_CHAN_DISABLED)) | |
1622 | return -EINVAL; | |
1623 | ||
1624 | mutex_lock(&local->chanctx_mtx); | |
1625 | if (cfg80211_chandef_identical(chandef, &sdata->vif.bss_conf.chandef)) { | |
1626 | ret = 0; | |
1627 | goto out; | |
1628 | } | |
1629 | ||
1630 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
1631 | sdata->vif.bss_conf.chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { | |
1632 | ret = -EINVAL; | |
1633 | goto out; | |
1634 | } | |
1635 | ||
1636 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1637 | lockdep_is_held(&local->chanctx_mtx)); | |
1638 | if (!conf) { | |
1639 | ret = -EINVAL; | |
1640 | goto out; | |
1641 | } | |
1642 | ||
1643 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1644 | |
1645 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1646 | if (!compat) { | |
2c9b7359 JB |
1647 | ret = -EINVAL; |
1648 | goto out; | |
1649 | } | |
1650 | ||
5bcae31d MK |
1651 | switch (ctx->replace_state) { |
1652 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1653 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1654 | ret = -EBUSY; | |
1655 | goto out; | |
1656 | } | |
1657 | break; | |
1658 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1659 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1660 | * reservation itself? */ |
1661 | ret = -EBUSY; | |
1662 | goto out; | |
1663 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1664 | /* channel context that is going to replace another channel | |
1665 | * context doesn't really exist and shouldn't be assigned | |
1666 | * anywhere yet */ | |
1667 | WARN_ON(1); | |
1668 | break; | |
1669 | } | |
1670 | ||
2967e031 | 1671 | ieee80211_vif_update_chandef(sdata, chandef); |
2c9b7359 JB |
1672 | |
1673 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1674 | ||
1675 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1676 | ret = 0; | |
1677 | out: | |
1678 | mutex_unlock(&local->chanctx_mtx); | |
1679 | return ret; | |
1680 | } | |
1681 | ||
d01a1e65 MK |
1682 | void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata) |
1683 | { | |
55de908a JB |
1684 | WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev)); |
1685 | ||
34a3740d JB |
1686 | lockdep_assert_held(&sdata->local->mtx); |
1687 | ||
d01a1e65 MK |
1688 | mutex_lock(&sdata->local->chanctx_mtx); |
1689 | __ieee80211_vif_release_channel(sdata); | |
1690 | mutex_unlock(&sdata->local->chanctx_mtx); | |
1691 | } | |
3448c005 | 1692 | |
4d76d21b JB |
1693 | void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata) |
1694 | { | |
1695 | struct ieee80211_local *local = sdata->local; | |
1696 | struct ieee80211_sub_if_data *ap; | |
1697 | struct ieee80211_chanctx_conf *conf; | |
1698 | ||
1699 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
1700 | return; | |
1701 | ||
1702 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
1703 | ||
1704 | mutex_lock(&local->chanctx_mtx); | |
1705 | ||
1706 | conf = rcu_dereference_protected(ap->vif.chanctx_conf, | |
1707 | lockdep_is_held(&local->chanctx_mtx)); | |
1708 | rcu_assign_pointer(sdata->vif.chanctx_conf, conf); | |
1709 | mutex_unlock(&local->chanctx_mtx); | |
1710 | } | |
1711 | ||
3448c005 JB |
1712 | void ieee80211_iter_chan_contexts_atomic( |
1713 | struct ieee80211_hw *hw, | |
1714 | void (*iter)(struct ieee80211_hw *hw, | |
1715 | struct ieee80211_chanctx_conf *chanctx_conf, | |
1716 | void *data), | |
1717 | void *iter_data) | |
1718 | { | |
1719 | struct ieee80211_local *local = hw_to_local(hw); | |
1720 | struct ieee80211_chanctx *ctx; | |
1721 | ||
1722 | rcu_read_lock(); | |
1723 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
1724 | if (ctx->driver_present) |
1725 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
1726 | rcu_read_unlock(); |
1727 | } | |
1728 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |