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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
f444de05 JB |
2 | /* |
3 | * mac80211 - channel management | |
d0a9123e | 4 | * Copyright 2020 - 2022 Intel Corporation |
f444de05 JB |
5 | */ |
6 | ||
0aaffa9b | 7 | #include <linux/nl80211.h> |
3448c005 | 8 | #include <linux/export.h> |
4d76d21b | 9 | #include <linux/rtnetlink.h> |
3117bbdb | 10 | #include <net/cfg80211.h> |
f444de05 | 11 | #include "ieee80211_i.h" |
35f2fce9 | 12 | #include "driver-ops.h" |
44b72ca8 | 13 | #include "rate.h" |
f444de05 | 14 | |
c0166da9 MK |
15 | static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local, |
16 | struct ieee80211_chanctx *ctx) | |
17 | { | |
b4f85443 | 18 | struct ieee80211_link_data *link; |
c0166da9 MK |
19 | int num = 0; |
20 | ||
21 | lockdep_assert_held(&local->chanctx_mtx); | |
22 | ||
b4f85443 | 23 | list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list) |
c0166da9 MK |
24 | num++; |
25 | ||
26 | return num; | |
27 | } | |
28 | ||
29 | static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local, | |
30 | struct ieee80211_chanctx *ctx) | |
31 | { | |
b4f85443 | 32 | struct ieee80211_link_data *link; |
c0166da9 MK |
33 | int num = 0; |
34 | ||
35 | lockdep_assert_held(&local->chanctx_mtx); | |
36 | ||
b4f85443 | 37 | list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list) |
c0166da9 MK |
38 | num++; |
39 | ||
40 | return num; | |
41 | } | |
42 | ||
43 | int ieee80211_chanctx_refcount(struct ieee80211_local *local, | |
44 | struct ieee80211_chanctx *ctx) | |
45 | { | |
46 | return ieee80211_chanctx_num_assigned(local, ctx) + | |
47 | ieee80211_chanctx_num_reserved(local, ctx); | |
48 | } | |
49 | ||
c2b90ad8 MK |
50 | static int ieee80211_num_chanctx(struct ieee80211_local *local) |
51 | { | |
52 | struct ieee80211_chanctx *ctx; | |
53 | int num = 0; | |
54 | ||
55 | lockdep_assert_held(&local->chanctx_mtx); | |
56 | ||
57 | list_for_each_entry(ctx, &local->chanctx_list, list) | |
58 | num++; | |
59 | ||
60 | return num; | |
61 | } | |
62 | ||
63 | static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local) | |
64 | { | |
65 | lockdep_assert_held(&local->chanctx_mtx); | |
66 | return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local); | |
67 | } | |
68 | ||
5bcae31d | 69 | static struct ieee80211_chanctx * |
d8675a63 | 70 | ieee80211_link_get_chanctx(struct ieee80211_link_data *link) |
5bcae31d | 71 | { |
d8675a63 | 72 | struct ieee80211_local *local __maybe_unused = link->sdata->local; |
5bcae31d MK |
73 | struct ieee80211_chanctx_conf *conf; |
74 | ||
d8675a63 | 75 | conf = rcu_dereference_protected(link->conf->chanctx_conf, |
5bcae31d MK |
76 | lockdep_is_held(&local->chanctx_mtx)); |
77 | if (!conf) | |
78 | return NULL; | |
79 | ||
80 | return container_of(conf, struct ieee80211_chanctx, conf); | |
81 | } | |
82 | ||
0288157b MK |
83 | static const struct cfg80211_chan_def * |
84 | ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local, | |
85 | struct ieee80211_chanctx *ctx, | |
86 | const struct cfg80211_chan_def *compat) | |
87 | { | |
b4f85443 | 88 | struct ieee80211_link_data *link; |
0288157b MK |
89 | |
90 | lockdep_assert_held(&local->chanctx_mtx); | |
91 | ||
b4f85443 | 92 | list_for_each_entry(link, &ctx->reserved_links, |
0288157b MK |
93 | reserved_chanctx_list) { |
94 | if (!compat) | |
b4f85443 | 95 | compat = &link->reserved_chandef; |
0288157b | 96 | |
b4f85443 | 97 | compat = cfg80211_chandef_compatible(&link->reserved_chandef, |
0288157b MK |
98 | compat); |
99 | if (!compat) | |
100 | break; | |
101 | } | |
102 | ||
103 | return compat; | |
104 | } | |
105 | ||
13f348a8 MK |
106 | static const struct cfg80211_chan_def * |
107 | ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local, | |
108 | struct ieee80211_chanctx *ctx, | |
109 | const struct cfg80211_chan_def *compat) | |
110 | { | |
b4f85443 | 111 | struct ieee80211_link_data *link; |
13f348a8 MK |
112 | |
113 | lockdep_assert_held(&local->chanctx_mtx); | |
114 | ||
b4f85443 | 115 | list_for_each_entry(link, &ctx->assigned_links, |
13f348a8 | 116 | assigned_chanctx_list) { |
d8675a63 | 117 | struct ieee80211_bss_conf *link_conf = link->conf; |
b4f85443 JB |
118 | |
119 | if (link->reserved_chanctx) | |
13f348a8 MK |
120 | continue; |
121 | ||
122 | if (!compat) | |
b4f85443 | 123 | compat = &link_conf->chandef; |
13f348a8 MK |
124 | |
125 | compat = cfg80211_chandef_compatible( | |
b4f85443 | 126 | &link_conf->chandef, compat); |
13f348a8 MK |
127 | if (!compat) |
128 | break; | |
129 | } | |
130 | ||
131 | return compat; | |
132 | } | |
133 | ||
134 | static const struct cfg80211_chan_def * | |
135 | ieee80211_chanctx_combined_chandef(struct ieee80211_local *local, | |
136 | struct ieee80211_chanctx *ctx, | |
137 | const struct cfg80211_chan_def *compat) | |
138 | { | |
139 | lockdep_assert_held(&local->chanctx_mtx); | |
140 | ||
141 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat); | |
142 | if (!compat) | |
143 | return NULL; | |
144 | ||
145 | compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat); | |
146 | if (!compat) | |
147 | return NULL; | |
148 | ||
149 | return compat; | |
150 | } | |
151 | ||
152 | static bool | |
153 | ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local, | |
154 | struct ieee80211_chanctx *ctx, | |
155 | const struct cfg80211_chan_def *def) | |
156 | { | |
157 | lockdep_assert_held(&local->chanctx_mtx); | |
158 | ||
159 | if (ieee80211_chanctx_combined_chandef(local, ctx, def)) | |
160 | return true; | |
161 | ||
b4f85443 | 162 | if (!list_empty(&ctx->reserved_links) && |
13f348a8 MK |
163 | ieee80211_chanctx_reserved_chandef(local, ctx, def)) |
164 | return true; | |
165 | ||
166 | return false; | |
167 | } | |
168 | ||
169 | static struct ieee80211_chanctx * | |
170 | ieee80211_find_reservation_chanctx(struct ieee80211_local *local, | |
171 | const struct cfg80211_chan_def *chandef, | |
172 | enum ieee80211_chanctx_mode mode) | |
173 | { | |
174 | struct ieee80211_chanctx *ctx; | |
175 | ||
176 | lockdep_assert_held(&local->chanctx_mtx); | |
177 | ||
178 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
179 | return NULL; | |
180 | ||
181 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
5bcae31d MK |
182 | if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) |
183 | continue; | |
184 | ||
13f348a8 MK |
185 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
186 | continue; | |
187 | ||
188 | if (!ieee80211_chanctx_can_reserve_chandef(local, ctx, | |
189 | chandef)) | |
190 | continue; | |
191 | ||
192 | return ctx; | |
193 | } | |
194 | ||
195 | return NULL; | |
196 | } | |
197 | ||
b4f85443 JB |
198 | static enum nl80211_chan_width ieee80211_get_sta_bw(struct sta_info *sta, |
199 | unsigned int link_id) | |
21f659bf | 200 | { |
c71420db JB |
201 | enum ieee80211_sta_rx_bandwidth width; |
202 | struct link_sta_info *link_sta; | |
203 | ||
204 | link_sta = rcu_dereference(sta->link[link_id]); | |
b4f85443 JB |
205 | |
206 | /* no effect if this STA has no presence on this link */ | |
c71420db | 207 | if (!link_sta) |
b4f85443 | 208 | return NL80211_CHAN_WIDTH_20_NOHT; |
bbf31e88 | 209 | |
c71420db JB |
210 | width = ieee80211_sta_cap_rx_bw(link_sta); |
211 | ||
bbf31e88 | 212 | switch (width) { |
21f659bf | 213 | case IEEE80211_STA_RX_BW_20: |
c71420db | 214 | if (link_sta->pub->ht_cap.ht_supported) |
21f659bf EP |
215 | return NL80211_CHAN_WIDTH_20; |
216 | else | |
217 | return NL80211_CHAN_WIDTH_20_NOHT; | |
218 | case IEEE80211_STA_RX_BW_40: | |
219 | return NL80211_CHAN_WIDTH_40; | |
220 | case IEEE80211_STA_RX_BW_80: | |
221 | return NL80211_CHAN_WIDTH_80; | |
222 | case IEEE80211_STA_RX_BW_160: | |
223 | /* | |
224 | * This applied for both 160 and 80+80. since we use | |
225 | * the returned value to consider degradation of | |
226 | * ctx->conf.min_def, we have to make sure to take | |
227 | * the bigger one (NL80211_CHAN_WIDTH_160). | |
228 | * Otherwise we might try degrading even when not | |
229 | * needed, as the max required sta_bw returned (80+80) | |
230 | * might be smaller than the configured bw (160). | |
231 | */ | |
232 | return NL80211_CHAN_WIDTH_160; | |
5dca295d IP |
233 | case IEEE80211_STA_RX_BW_320: |
234 | return NL80211_CHAN_WIDTH_320; | |
21f659bf EP |
235 | default: |
236 | WARN_ON(1); | |
237 | return NL80211_CHAN_WIDTH_20; | |
238 | } | |
239 | } | |
240 | ||
241 | static enum nl80211_chan_width | |
b4f85443 JB |
242 | ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata, |
243 | unsigned int link_id) | |
21f659bf EP |
244 | { |
245 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
246 | struct sta_info *sta; | |
247 | ||
21f659bf EP |
248 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { |
249 | if (sdata != sta->sdata && | |
250 | !(sta->sdata->bss && sta->sdata->bss == sdata->bss)) | |
251 | continue; | |
252 | ||
b4f85443 | 253 | max_bw = max(max_bw, ieee80211_get_sta_bw(sta, link_id)); |
21f659bf | 254 | } |
21f659bf EP |
255 | |
256 | return max_bw; | |
257 | } | |
258 | ||
259 | static enum nl80211_chan_width | |
b4f85443 JB |
260 | ieee80211_get_chanctx_vif_max_required_bw(struct ieee80211_sub_if_data *sdata, |
261 | struct ieee80211_chanctx_conf *conf) | |
21f659bf | 262 | { |
21f659bf | 263 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; |
b4f85443 JB |
264 | struct ieee80211_vif *vif = &sdata->vif; |
265 | int link_id; | |
21f659bf | 266 | |
d8675a63 | 267 | rcu_read_lock(); |
b4f85443 | 268 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
21f659bf | 269 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; |
b4f85443 | 270 | struct ieee80211_bss_conf *link_conf = |
d8675a63 | 271 | rcu_dereference(sdata->vif.link_conf[link_id]); |
21f659bf | 272 | |
b4f85443 | 273 | if (!link_conf) |
21f659bf EP |
274 | continue; |
275 | ||
b4f85443 | 276 | if (rcu_access_pointer(link_conf->chanctx_conf) != conf) |
21f659bf EP |
277 | continue; |
278 | ||
279 | switch (vif->type) { | |
280 | case NL80211_IFTYPE_AP: | |
281 | case NL80211_IFTYPE_AP_VLAN: | |
b4f85443 | 282 | width = ieee80211_get_max_required_bw(sdata, link_id); |
21f659bf | 283 | break; |
0fabfaaf AN |
284 | case NL80211_IFTYPE_STATION: |
285 | /* | |
286 | * The ap's sta->bandwidth is not set yet at this | |
287 | * point, so take the width from the chandef, but | |
288 | * account also for TDLS peers | |
289 | */ | |
b4f85443 JB |
290 | width = max(link_conf->chandef.width, |
291 | ieee80211_get_max_required_bw(sdata, link_id)); | |
0fabfaaf | 292 | break; |
21f659bf | 293 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 294 | case NL80211_IFTYPE_NAN: |
21f659bf | 295 | continue; |
21f659bf | 296 | case NL80211_IFTYPE_ADHOC: |
21f659bf | 297 | case NL80211_IFTYPE_MESH_POINT: |
6e0bd6c3 | 298 | case NL80211_IFTYPE_OCB: |
b4f85443 | 299 | width = link_conf->chandef.width; |
21f659bf | 300 | break; |
70d9c599 | 301 | case NL80211_IFTYPE_WDS: |
21f659bf EP |
302 | case NL80211_IFTYPE_UNSPECIFIED: |
303 | case NUM_NL80211_IFTYPES: | |
304 | case NL80211_IFTYPE_MONITOR: | |
305 | case NL80211_IFTYPE_P2P_CLIENT: | |
306 | case NL80211_IFTYPE_P2P_GO: | |
307 | WARN_ON_ONCE(1); | |
308 | } | |
b4f85443 JB |
309 | |
310 | max_bw = max(max_bw, width); | |
311 | } | |
d8675a63 | 312 | rcu_read_unlock(); |
b4f85443 JB |
313 | |
314 | return max_bw; | |
315 | } | |
316 | ||
317 | static enum nl80211_chan_width | |
318 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
319 | struct ieee80211_chanctx_conf *conf) | |
320 | { | |
321 | struct ieee80211_sub_if_data *sdata; | |
322 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
323 | ||
324 | rcu_read_lock(); | |
325 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
326 | enum nl80211_chan_width width; | |
327 | ||
328 | if (!ieee80211_sdata_running(sdata)) | |
329 | continue; | |
330 | ||
331 | width = ieee80211_get_chanctx_vif_max_required_bw(sdata, conf); | |
332 | ||
21f659bf EP |
333 | max_bw = max(max_bw, width); |
334 | } | |
1c37a72c EP |
335 | |
336 | /* use the configured bandwidth in case of monitor interface */ | |
337 | sdata = rcu_dereference(local->monitor_sdata); | |
b4f85443 | 338 | if (sdata && |
d8675a63 | 339 | rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf) == conf) |
1c37a72c EP |
340 | max_bw = max(max_bw, conf->def.width); |
341 | ||
21f659bf EP |
342 | rcu_read_unlock(); |
343 | ||
344 | return max_bw; | |
345 | } | |
346 | ||
347 | /* | |
348 | * recalc the min required chan width of the channel context, which is | |
349 | * the max of min required widths of all the interfaces bound to this | |
350 | * channel context. | |
351 | */ | |
d6c37509 MG |
352 | static u32 _ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, |
353 | struct ieee80211_chanctx *ctx) | |
21f659bf EP |
354 | { |
355 | enum nl80211_chan_width max_bw; | |
356 | struct cfg80211_chan_def min_def; | |
357 | ||
358 | lockdep_assert_held(&local->chanctx_mtx); | |
359 | ||
df78a0c0 | 360 | /* don't optimize non-20MHz based and radar_enabled confs */ |
21f659bf EP |
361 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || |
362 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
df78a0c0 TP |
363 | ctx->conf.def.width == NL80211_CHAN_WIDTH_1 || |
364 | ctx->conf.def.width == NL80211_CHAN_WIDTH_2 || | |
365 | ctx->conf.def.width == NL80211_CHAN_WIDTH_4 || | |
366 | ctx->conf.def.width == NL80211_CHAN_WIDTH_8 || | |
367 | ctx->conf.def.width == NL80211_CHAN_WIDTH_16 || | |
21f659bf EP |
368 | ctx->conf.radar_enabled) { |
369 | ctx->conf.min_def = ctx->conf.def; | |
d6c37509 | 370 | return 0; |
21f659bf EP |
371 | } |
372 | ||
373 | max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf); | |
374 | ||
375 | /* downgrade chandef up to max_bw */ | |
376 | min_def = ctx->conf.def; | |
377 | while (min_def.width > max_bw) | |
378 | ieee80211_chandef_downgrade(&min_def); | |
379 | ||
380 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
d6c37509 | 381 | return 0; |
21f659bf EP |
382 | |
383 | ctx->conf.min_def = min_def; | |
384 | if (!ctx->driver_present) | |
d6c37509 | 385 | return 0; |
21f659bf | 386 | |
d6c37509 | 387 | return IEEE80211_CHANCTX_CHANGE_MIN_WIDTH; |
21f659bf EP |
388 | } |
389 | ||
d6c37509 | 390 | /* calling this function is assuming that station vif is updated to |
b4f85443 | 391 | * lates changes by calling ieee80211_link_update_chandef |
d6c37509 | 392 | */ |
44b72ca8 | 393 | static void ieee80211_chan_bw_change(struct ieee80211_local *local, |
d6c37509 MG |
394 | struct ieee80211_chanctx *ctx, |
395 | bool narrowed) | |
44b72ca8 IP |
396 | { |
397 | struct sta_info *sta; | |
398 | struct ieee80211_supported_band *sband = | |
399 | local->hw.wiphy->bands[ctx->conf.def.chan->band]; | |
400 | ||
401 | rcu_read_lock(); | |
402 | list_for_each_entry_rcu(sta, &local->sta_list, | |
403 | list) { | |
b4f85443 | 404 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
44b72ca8 | 405 | enum ieee80211_sta_rx_bandwidth new_sta_bw; |
b4f85443 | 406 | unsigned int link_id; |
44b72ca8 IP |
407 | |
408 | if (!ieee80211_sdata_running(sta->sdata)) | |
409 | continue; | |
410 | ||
b4f85443 JB |
411 | for (link_id = 0; link_id < ARRAY_SIZE(sta->sdata->link); link_id++) { |
412 | struct ieee80211_bss_conf *link_conf = | |
d8675a63 | 413 | rcu_dereference(sdata->vif.link_conf[link_id]); |
c71420db | 414 | struct link_sta_info *link_sta; |
b4f85443 JB |
415 | |
416 | if (!link_conf) | |
417 | continue; | |
44b72ca8 | 418 | |
b4f85443 JB |
419 | if (rcu_access_pointer(link_conf->chanctx_conf) != &ctx->conf) |
420 | continue; | |
d6c37509 | 421 | |
c71420db JB |
422 | link_sta = rcu_dereference(sta->link[link_id]); |
423 | if (!link_sta) | |
424 | continue; | |
425 | ||
426 | new_sta_bw = ieee80211_sta_cur_vht_bw(link_sta); | |
44b72ca8 | 427 | |
b4f85443 | 428 | /* nothing change */ |
c71420db | 429 | if (new_sta_bw == link_sta->pub->bandwidth) |
b4f85443 JB |
430 | continue; |
431 | ||
432 | /* vif changed to narrow BW and narrow BW for station wasn't | |
433 | * requested or vise versa */ | |
c71420db | 434 | if ((new_sta_bw < link_sta->pub->bandwidth) == !narrowed) |
b4f85443 | 435 | continue; |
d6c37509 | 436 | |
c71420db | 437 | link_sta->pub->bandwidth = new_sta_bw; |
b4f85443 JB |
438 | rate_control_rate_update(local, sband, sta, link_id, |
439 | IEEE80211_RC_BW_CHANGED); | |
440 | } | |
44b72ca8 IP |
441 | } |
442 | rcu_read_unlock(); | |
443 | } | |
444 | ||
d6c37509 MG |
445 | /* |
446 | * recalc the min required chan width of the channel context, which is | |
447 | * the max of min required widths of all the interfaces bound to this | |
448 | * channel context. | |
449 | */ | |
450 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
451 | struct ieee80211_chanctx *ctx) | |
23a85b45 | 452 | { |
d6c37509 | 453 | u32 changed = _ieee80211_recalc_chanctx_min_def(local, ctx); |
44b72ca8 | 454 | |
d6c37509 | 455 | if (!changed) |
e89a96f5 | 456 | return; |
0aaffa9b | 457 | |
d6c37509 MG |
458 | /* check is BW narrowed */ |
459 | ieee80211_chan_bw_change(local, ctx, true); | |
4bf88530 | 460 | |
d6c37509 MG |
461 | drv_change_chanctx(local, ctx, changed); |
462 | ||
463 | /* check is BW wider */ | |
464 | ieee80211_chan_bw_change(local, ctx, false); | |
465 | } | |
466 | ||
467 | static void ieee80211_change_chanctx(struct ieee80211_local *local, | |
468 | struct ieee80211_chanctx *ctx, | |
469 | struct ieee80211_chanctx *old_ctx, | |
470 | const struct cfg80211_chan_def *chandef) | |
471 | { | |
472 | u32 changed; | |
44b72ca8 | 473 | |
5dca295d | 474 | /* expected to handle only 20/40/80/160/320 channel widths */ |
44b72ca8 IP |
475 | switch (chandef->width) { |
476 | case NL80211_CHAN_WIDTH_20_NOHT: | |
477 | case NL80211_CHAN_WIDTH_20: | |
478 | case NL80211_CHAN_WIDTH_40: | |
479 | case NL80211_CHAN_WIDTH_80: | |
480 | case NL80211_CHAN_WIDTH_80P80: | |
481 | case NL80211_CHAN_WIDTH_160: | |
5dca295d | 482 | case NL80211_CHAN_WIDTH_320: |
44b72ca8 IP |
483 | break; |
484 | default: | |
485 | WARN_ON(1); | |
486 | } | |
487 | ||
d6c37509 MG |
488 | /* Check maybe BW narrowed - we do this _before_ calling recalc_chanctx_min_def |
489 | * due to maybe not returning from it, e.g in case new context was added | |
490 | * first time with all parameters up to date. | |
491 | */ | |
492 | ieee80211_chan_bw_change(local, old_ctx, true); | |
493 | ||
494 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) { | |
495 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
496 | return; | |
497 | } | |
44b72ca8 | 498 | |
d6c37509 MG |
499 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
500 | ||
501 | ctx->conf.def = *chandef; | |
502 | ||
503 | /* check if min chanctx also changed */ | |
504 | changed = IEEE80211_CHANCTX_CHANGE_WIDTH | | |
505 | _ieee80211_recalc_chanctx_min_def(local, ctx); | |
506 | drv_change_chanctx(local, ctx, changed); | |
55de908a JB |
507 | |
508 | if (!local->use_chanctx) { | |
675a0b04 | 509 | local->_oper_chandef = *chandef; |
55de908a JB |
510 | ieee80211_hw_config(local, 0); |
511 | } | |
44b72ca8 | 512 | |
d6c37509 MG |
513 | /* check is BW wider */ |
514 | ieee80211_chan_bw_change(local, old_ctx, false); | |
0aaffa9b | 515 | } |
d01a1e65 MK |
516 | |
517 | static struct ieee80211_chanctx * | |
518 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 519 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
520 | enum ieee80211_chanctx_mode mode) |
521 | { | |
522 | struct ieee80211_chanctx *ctx; | |
523 | ||
524 | lockdep_assert_held(&local->chanctx_mtx); | |
525 | ||
526 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
527 | return NULL; | |
d01a1e65 MK |
528 | |
529 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 530 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 531 | |
5bcae31d MK |
532 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
533 | continue; | |
534 | ||
d01a1e65 MK |
535 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
536 | continue; | |
4bf88530 JB |
537 | |
538 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
539 | if (!compat) | |
d01a1e65 MK |
540 | continue; |
541 | ||
0288157b MK |
542 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
543 | compat); | |
544 | if (!compat) | |
545 | continue; | |
546 | ||
d6c37509 | 547 | ieee80211_change_chanctx(local, ctx, ctx, compat); |
e89a96f5 | 548 | |
d01a1e65 MK |
549 | return ctx; |
550 | } | |
551 | ||
552 | return NULL; | |
553 | } | |
554 | ||
5cbc95a7 | 555 | bool ieee80211_is_radar_required(struct ieee80211_local *local) |
e4746851 SW |
556 | { |
557 | struct ieee80211_sub_if_data *sdata; | |
558 | ||
cc901de1 MK |
559 | lockdep_assert_held(&local->mtx); |
560 | ||
e4746851 SW |
561 | rcu_read_lock(); |
562 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 JB |
563 | unsigned int link_id; |
564 | ||
565 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { | |
d8675a63 JB |
566 | struct ieee80211_link_data *link; |
567 | ||
568 | link = rcu_dereference(sdata->link[link_id]); | |
569 | ||
570 | if (link && link->radar_required) { | |
b4f85443 JB |
571 | rcu_read_unlock(); |
572 | return true; | |
573 | } | |
e4746851 SW |
574 | } |
575 | } | |
576 | rcu_read_unlock(); | |
577 | ||
578 | return false; | |
579 | } | |
580 | ||
e7f2337a EP |
581 | static bool |
582 | ieee80211_chanctx_radar_required(struct ieee80211_local *local, | |
583 | struct ieee80211_chanctx *ctx) | |
584 | { | |
585 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
586 | struct ieee80211_sub_if_data *sdata; | |
587 | bool required = false; | |
588 | ||
589 | lockdep_assert_held(&local->chanctx_mtx); | |
590 | lockdep_assert_held(&local->mtx); | |
591 | ||
592 | rcu_read_lock(); | |
593 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 JB |
594 | unsigned int link_id; |
595 | ||
e7f2337a EP |
596 | if (!ieee80211_sdata_running(sdata)) |
597 | continue; | |
b4f85443 | 598 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
d8675a63 | 599 | struct ieee80211_link_data *link; |
e7f2337a | 600 | |
d8675a63 JB |
601 | link = rcu_dereference(sdata->link[link_id]); |
602 | if (!link) | |
b4f85443 JB |
603 | continue; |
604 | ||
d8675a63 | 605 | if (rcu_access_pointer(link->conf->chanctx_conf) != conf) |
b4f85443 | 606 | continue; |
d8675a63 | 607 | if (!link->radar_required) |
b4f85443 JB |
608 | continue; |
609 | required = true; | |
610 | break; | |
611 | } | |
612 | ||
613 | if (required) | |
614 | break; | |
e7f2337a EP |
615 | } |
616 | rcu_read_unlock(); | |
617 | ||
618 | return required; | |
619 | } | |
620 | ||
d01a1e65 | 621 | static struct ieee80211_chanctx * |
ed68ebca MK |
622 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
623 | const struct cfg80211_chan_def *chandef, | |
624 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
625 | { |
626 | struct ieee80211_chanctx *ctx; | |
627 | ||
628 | lockdep_assert_held(&local->chanctx_mtx); | |
629 | ||
630 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
631 | if (!ctx) | |
ed68ebca | 632 | return NULL; |
d01a1e65 | 633 | |
b4f85443 JB |
634 | INIT_LIST_HEAD(&ctx->assigned_links); |
635 | INIT_LIST_HEAD(&ctx->reserved_links); | |
4bf88530 | 636 | ctx->conf.def = *chandef; |
04ecd257 JB |
637 | ctx->conf.rx_chains_static = 1; |
638 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 639 | ctx->mode = mode; |
e7f2337a | 640 | ctx->conf.radar_enabled = false; |
21f659bf | 641 | ieee80211_recalc_chanctx_min_def(local, ctx); |
ed68ebca MK |
642 | |
643 | return ctx; | |
644 | } | |
645 | ||
646 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
647 | struct ieee80211_chanctx *ctx) | |
648 | { | |
649 | u32 changed; | |
650 | int err; | |
651 | ||
652 | lockdep_assert_held(&local->mtx); | |
653 | lockdep_assert_held(&local->chanctx_mtx); | |
654 | ||
e4746851 SW |
655 | if (!local->use_chanctx) |
656 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 657 | |
382a103b JB |
658 | /* turn idle off *before* setting channel -- some drivers need that */ |
659 | changed = ieee80211_idle_off(local); | |
660 | if (changed) | |
661 | ieee80211_hw_config(local, changed); | |
662 | ||
55de908a | 663 | if (!local->use_chanctx) { |
ed68ebca | 664 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 665 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
666 | } else { |
667 | err = drv_add_chanctx(local, ctx); | |
668 | if (err) { | |
382a103b | 669 | ieee80211_recalc_idle(local); |
ed68ebca | 670 | return err; |
55de908a | 671 | } |
35f2fce9 MK |
672 | } |
673 | ||
ed68ebca MK |
674 | return 0; |
675 | } | |
676 | ||
677 | static struct ieee80211_chanctx * | |
678 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
679 | const struct cfg80211_chan_def *chandef, | |
680 | enum ieee80211_chanctx_mode mode) | |
681 | { | |
682 | struct ieee80211_chanctx *ctx; | |
683 | int err; | |
d01a1e65 | 684 | |
ed68ebca MK |
685 | lockdep_assert_held(&local->mtx); |
686 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 687 | |
ed68ebca MK |
688 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
689 | if (!ctx) | |
690 | return ERR_PTR(-ENOMEM); | |
691 | ||
692 | err = ieee80211_add_chanctx(local, ctx); | |
693 | if (err) { | |
694 | kfree(ctx); | |
695 | return ERR_PTR(err); | |
696 | } | |
697 | ||
698 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
699 | return ctx; |
700 | } | |
701 | ||
1f0d54cd MK |
702 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
703 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
704 | { |
705 | lockdep_assert_held(&local->chanctx_mtx); | |
706 | ||
55de908a | 707 | if (!local->use_chanctx) { |
675a0b04 | 708 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
5e480774 TP |
709 | /* S1G doesn't have 20MHz, so get the correct width for the |
710 | * current channel. | |
711 | */ | |
712 | if (chandef->chan->band == NL80211_BAND_S1GHZ) | |
713 | chandef->width = | |
714 | ieee80211_s1g_channel_width(chandef->chan); | |
715 | else | |
716 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
675a0b04 | 717 | chandef->center_freq1 = chandef->chan->center_freq; |
b6011960 | 718 | chandef->freq1_offset = chandef->chan->freq_offset; |
675a0b04 | 719 | chandef->center_freq2 = 0; |
e4746851 SW |
720 | |
721 | /* NOTE: Disabling radar is only valid here for | |
722 | * single channel context. To be sure, check it ... | |
723 | */ | |
1f0d54cd MK |
724 | WARN_ON(local->hw.conf.radar_enabled && |
725 | !list_empty(&local->chanctx_list)); | |
726 | ||
e4746851 SW |
727 | local->hw.conf.radar_enabled = false; |
728 | ||
9b4816f5 | 729 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
730 | } else { |
731 | drv_remove_chanctx(local, ctx); | |
732 | } | |
35f2fce9 | 733 | |
fd0f979a | 734 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
735 | } |
736 | ||
1f0d54cd MK |
737 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
738 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 739 | { |
d01a1e65 MK |
740 | lockdep_assert_held(&local->chanctx_mtx); |
741 | ||
c0166da9 | 742 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 743 | |
1f0d54cd MK |
744 | list_del_rcu(&ctx->list); |
745 | ieee80211_del_chanctx(local, ctx); | |
746 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
747 | } |
748 | ||
0fabfaaf AN |
749 | void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
750 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
751 | { |
752 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
753 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 754 | const struct cfg80211_chan_def *compat = NULL; |
0fabfaaf | 755 | struct sta_info *sta; |
e89a96f5 MK |
756 | |
757 | lockdep_assert_held(&local->chanctx_mtx); | |
758 | ||
759 | rcu_read_lock(); | |
760 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 | 761 | int link_id; |
4bf88530 | 762 | |
e89a96f5 MK |
763 | if (!ieee80211_sdata_running(sdata)) |
764 | continue; | |
b4f85443 | 765 | |
0e67c136 FF |
766 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
767 | continue; | |
e89a96f5 | 768 | |
b4f85443 JB |
769 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
770 | struct ieee80211_bss_conf *link_conf = | |
d8675a63 | 771 | rcu_dereference(sdata->vif.link_conf[link_id]); |
4bf88530 | 772 | |
b4f85443 JB |
773 | if (!link_conf) |
774 | continue; | |
775 | ||
776 | if (rcu_access_pointer(link_conf->chanctx_conf) != conf) | |
777 | continue; | |
778 | ||
779 | if (!compat) | |
780 | compat = &link_conf->chandef; | |
781 | ||
782 | compat = cfg80211_chandef_compatible(&link_conf->chandef, | |
783 | compat); | |
784 | if (WARN_ON_ONCE(!compat)) | |
785 | break; | |
786 | } | |
e89a96f5 | 787 | } |
0fabfaaf AN |
788 | |
789 | /* TDLS peers can sometimes affect the chandef width */ | |
790 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
791 | if (!sta->uploaded || | |
792 | !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) || | |
793 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
794 | !sta->tdls_chandef.chan) | |
795 | continue; | |
796 | ||
797 | compat = cfg80211_chandef_compatible(&sta->tdls_chandef, | |
798 | compat); | |
799 | if (WARN_ON_ONCE(!compat)) | |
800 | break; | |
801 | } | |
e89a96f5 MK |
802 | rcu_read_unlock(); |
803 | ||
a00f4f6e | 804 | if (!compat) |
4bf88530 | 805 | return; |
e89a96f5 | 806 | |
d6c37509 | 807 | ieee80211_change_chanctx(local, ctx, ctx, compat); |
e89a96f5 MK |
808 | } |
809 | ||
367bbd10 JB |
810 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
811 | struct ieee80211_chanctx *chanctx) | |
812 | { | |
813 | bool radar_enabled; | |
814 | ||
815 | lockdep_assert_held(&local->chanctx_mtx); | |
5cbc95a7 | 816 | /* for ieee80211_is_radar_required */ |
34a3740d | 817 | lockdep_assert_held(&local->mtx); |
367bbd10 | 818 | |
e7f2337a | 819 | radar_enabled = ieee80211_chanctx_radar_required(local, chanctx); |
367bbd10 JB |
820 | |
821 | if (radar_enabled == chanctx->conf.radar_enabled) | |
822 | return; | |
823 | ||
824 | chanctx->conf.radar_enabled = radar_enabled; | |
367bbd10 JB |
825 | |
826 | if (!local->use_chanctx) { | |
827 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
828 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
829 | } | |
830 | ||
831 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
832 | } | |
833 | ||
b4f85443 JB |
834 | static int ieee80211_assign_link_chanctx(struct ieee80211_link_data *link, |
835 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 836 | { |
b4f85443 | 837 | struct ieee80211_sub_if_data *sdata = link->sdata; |
35f2fce9 | 838 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
839 | struct ieee80211_chanctx_conf *conf; |
840 | struct ieee80211_chanctx *curr_ctx = NULL; | |
841 | int ret = 0; | |
d01a1e65 | 842 | |
708d50ed AB |
843 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN)) |
844 | return -ENOTSUPP; | |
845 | ||
d8675a63 | 846 | conf = rcu_dereference_protected(link->conf->chanctx_conf, |
77eeba97 | 847 | lockdep_is_held(&local->chanctx_mtx)); |
d01a1e65 | 848 | |
77eeba97 LC |
849 | if (conf) { |
850 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 851 | |
727eff4d | 852 | drv_unassign_vif_chanctx(local, sdata, link->conf, curr_ctx); |
77eeba97 | 853 | conf = NULL; |
b4f85443 | 854 | list_del(&link->assigned_chanctx_list); |
77eeba97 | 855 | } |
5bbe754d | 856 | |
77eeba97 | 857 | if (new_ctx) { |
727eff4d | 858 | ret = drv_assign_vif_chanctx(local, sdata, link->conf, new_ctx); |
77eeba97 LC |
859 | if (ret) |
860 | goto out; | |
fd0f979a | 861 | |
77eeba97 | 862 | conf = &new_ctx->conf; |
b4f85443 JB |
863 | list_add(&link->assigned_chanctx_list, |
864 | &new_ctx->assigned_links); | |
77eeba97 | 865 | } |
e89a96f5 | 866 | |
77eeba97 | 867 | out: |
d8675a63 | 868 | rcu_assign_pointer(link->conf->chanctx_conf, conf); |
fd0f979a | 869 | |
f276e20b | 870 | sdata->vif.cfg.idle = !conf; |
77eeba97 | 871 | |
c0166da9 | 872 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
873 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
874 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
875 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
876 | ieee80211_recalc_chanctx_min_def(local, curr_ctx); | |
04ecd257 | 877 | } |
e89a96f5 | 878 | |
c0166da9 | 879 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
db82d8a9 | 880 | ieee80211_recalc_txpower(sdata, false); |
77eeba97 | 881 | ieee80211_recalc_chanctx_min_def(local, new_ctx); |
04ecd257 | 882 | } |
77eeba97 LC |
883 | |
884 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
885 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
7b7090b4 | 886 | ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_IDLE); |
77eeba97 | 887 | |
17c18bf8 JB |
888 | ieee80211_check_fast_xmit_iface(sdata); |
889 | ||
77eeba97 | 890 | return ret; |
d01a1e65 MK |
891 | } |
892 | ||
04ecd257 JB |
893 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
894 | struct ieee80211_chanctx *chanctx) | |
895 | { | |
896 | struct ieee80211_sub_if_data *sdata; | |
897 | u8 rx_chains_static, rx_chains_dynamic; | |
898 | ||
899 | lockdep_assert_held(&local->chanctx_mtx); | |
900 | ||
901 | rx_chains_static = 1; | |
902 | rx_chains_dynamic = 1; | |
903 | ||
904 | rcu_read_lock(); | |
905 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
906 | u8 needed_static, needed_dynamic; | |
b4f85443 | 907 | unsigned int link_id; |
04ecd257 JB |
908 | |
909 | if (!ieee80211_sdata_running(sdata)) | |
910 | continue; | |
911 | ||
04ecd257 | 912 | switch (sdata->vif.type) { |
04ecd257 JB |
913 | case NL80211_IFTYPE_STATION: |
914 | if (!sdata->u.mgd.associated) | |
915 | continue; | |
916 | break; | |
04ecd257 JB |
917 | case NL80211_IFTYPE_AP: |
918 | case NL80211_IFTYPE_ADHOC: | |
04ecd257 | 919 | case NL80211_IFTYPE_MESH_POINT: |
239281f8 | 920 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
921 | break; |
922 | default: | |
b4f85443 | 923 | continue; |
04ecd257 JB |
924 | } |
925 | ||
b4f85443 | 926 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
d8675a63 | 927 | struct ieee80211_link_data *link; |
b4f85443 | 928 | |
d8675a63 JB |
929 | link = rcu_dereference(sdata->link[link_id]); |
930 | ||
931 | if (!link) | |
b4f85443 JB |
932 | continue; |
933 | ||
d8675a63 | 934 | if (rcu_access_pointer(link->conf->chanctx_conf) != &chanctx->conf) |
b4f85443 JB |
935 | continue; |
936 | ||
937 | switch (link->smps_mode) { | |
938 | default: | |
939 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
940 | link->smps_mode); | |
941 | fallthrough; | |
942 | case IEEE80211_SMPS_OFF: | |
943 | needed_static = link->needed_rx_chains; | |
944 | needed_dynamic = link->needed_rx_chains; | |
945 | break; | |
946 | case IEEE80211_SMPS_DYNAMIC: | |
947 | needed_static = 1; | |
948 | needed_dynamic = link->needed_rx_chains; | |
949 | break; | |
950 | case IEEE80211_SMPS_STATIC: | |
951 | needed_static = 1; | |
952 | needed_dynamic = 1; | |
953 | break; | |
954 | } | |
04ecd257 | 955 | |
b4f85443 JB |
956 | rx_chains_static = max(rx_chains_static, needed_static); |
957 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
958 | } | |
04ecd257 | 959 | } |
7b8a9cdd IY |
960 | |
961 | /* Disable SMPS for the monitor interface */ | |
962 | sdata = rcu_dereference(local->monitor_sdata); | |
963 | if (sdata && | |
d8675a63 | 964 | rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf) == &chanctx->conf) |
7b8a9cdd IY |
965 | rx_chains_dynamic = rx_chains_static = local->rx_chains; |
966 | ||
04ecd257 JB |
967 | rcu_read_unlock(); |
968 | ||
969 | if (!local->use_chanctx) { | |
970 | if (rx_chains_static > 1) | |
971 | local->smps_mode = IEEE80211_SMPS_OFF; | |
972 | else if (rx_chains_dynamic > 1) | |
973 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
974 | else | |
975 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
976 | ieee80211_hw_config(local, 0); | |
977 | } | |
978 | ||
979 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
980 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
981 | return; | |
982 | ||
983 | chanctx->conf.rx_chains_static = rx_chains_static; | |
984 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
985 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
986 | } | |
987 | ||
11335a55 | 988 | static void |
b4f85443 JB |
989 | __ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link, |
990 | bool clear) | |
11335a55 | 991 | { |
b4f85443 JB |
992 | struct ieee80211_sub_if_data *sdata = link->sdata; |
993 | unsigned int link_id = link->link_id; | |
d8675a63 | 994 | struct ieee80211_bss_conf *link_conf = link->conf; |
33926eb7 | 995 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
996 | struct ieee80211_sub_if_data *vlan; |
997 | struct ieee80211_chanctx_conf *conf; | |
998 | ||
999 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
1000 | return; | |
1001 | ||
1002 | lockdep_assert_held(&local->mtx); | |
1003 | ||
1004 | /* Check that conf exists, even when clearing this function | |
1005 | * must be called with the AP's channel context still there | |
1006 | * as it would otherwise cause VLANs to have an invalid | |
1007 | * channel context pointer for a while, possibly pointing | |
1008 | * to a channel context that has already been freed. | |
1009 | */ | |
b4f85443 | 1010 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
33926eb7 | 1011 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
1012 | WARN_ON(!conf); |
1013 | ||
1014 | if (clear) | |
1015 | conf = NULL; | |
1016 | ||
d8675a63 JB |
1017 | rcu_read_lock(); |
1018 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { | |
1019 | struct ieee80211_bss_conf *vlan_conf; | |
1020 | ||
1021 | vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); | |
1022 | if (WARN_ON(!vlan_conf)) | |
1023 | continue; | |
1024 | ||
1025 | rcu_assign_pointer(vlan_conf->chanctx_conf, conf); | |
1026 | } | |
1027 | rcu_read_unlock(); | |
11335a55 LC |
1028 | } |
1029 | ||
b4f85443 JB |
1030 | void ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link, |
1031 | bool clear) | |
11335a55 | 1032 | { |
b4f85443 | 1033 | struct ieee80211_local *local = link->sdata->local; |
11335a55 LC |
1034 | |
1035 | mutex_lock(&local->chanctx_mtx); | |
1036 | ||
b4f85443 | 1037 | __ieee80211_link_copy_chanctx_to_vlans(link, clear); |
11335a55 LC |
1038 | |
1039 | mutex_unlock(&local->chanctx_mtx); | |
1040 | } | |
1041 | ||
b4f85443 | 1042 | int ieee80211_link_unreserve_chanctx(struct ieee80211_link_data *link) |
11335a55 | 1043 | { |
b4f85443 JB |
1044 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1045 | struct ieee80211_chanctx *ctx = link->reserved_chanctx; | |
e3afb920 | 1046 | |
11335a55 LC |
1047 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
1048 | ||
e3afb920 | 1049 | if (WARN_ON(!ctx)) |
73da7d5b SW |
1050 | return -EINVAL; |
1051 | ||
b4f85443 JB |
1052 | list_del(&link->reserved_chanctx_list); |
1053 | link->reserved_chanctx = NULL; | |
11335a55 | 1054 | |
5bcae31d MK |
1055 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
1056 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1057 | if (WARN_ON(!ctx->replace_ctx)) | |
1058 | return -EINVAL; | |
1059 | ||
1060 | WARN_ON(ctx->replace_ctx->replace_state != | |
1061 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
1062 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
1063 | ||
1064 | ctx->replace_ctx->replace_ctx = NULL; | |
1065 | ctx->replace_ctx->replace_state = | |
1066 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1067 | ||
1068 | list_del_rcu(&ctx->list); | |
1069 | kfree_rcu(ctx, rcu_head); | |
1070 | } else { | |
1071 | ieee80211_free_chanctx(sdata->local, ctx); | |
1072 | } | |
1073 | } | |
e3afb920 | 1074 | |
11335a55 LC |
1075 | return 0; |
1076 | } | |
1077 | ||
b4f85443 JB |
1078 | int ieee80211_link_reserve_chanctx(struct ieee80211_link_data *link, |
1079 | const struct cfg80211_chan_def *chandef, | |
1080 | enum ieee80211_chanctx_mode mode, | |
1081 | bool radar_required) | |
11335a55 | 1082 | { |
b4f85443 | 1083 | struct ieee80211_sub_if_data *sdata = link->sdata; |
11335a55 | 1084 | struct ieee80211_local *local = sdata->local; |
5bcae31d | 1085 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 1086 | |
5bcae31d | 1087 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 1088 | |
b4f85443 | 1089 | curr_ctx = ieee80211_link_get_chanctx(link); |
5bcae31d MK |
1090 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) |
1091 | return -ENOTSUPP; | |
11335a55 | 1092 | |
13f348a8 | 1093 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 1094 | if (!new_ctx) { |
5bcae31d | 1095 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 1096 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
1097 | if (IS_ERR(new_ctx)) |
1098 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 1099 | } else { |
5bcae31d MK |
1100 | if (!curr_ctx || |
1101 | (curr_ctx->replace_state == | |
1102 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
b4f85443 | 1103 | !list_empty(&curr_ctx->reserved_links)) { |
5bcae31d | 1104 | /* |
b4f85443 | 1105 | * Another link already requested this context |
5bcae31d | 1106 | * for a reservation. Find another one hoping |
b4f85443 | 1107 | * all links assigned to it will also switch |
5bcae31d MK |
1108 | * soon enough. |
1109 | * | |
1110 | * TODO: This needs a little more work as some | |
1111 | * cases (more than 2 chanctx capable devices) | |
1112 | * may fail which could otherwise succeed | |
1113 | * provided some channel context juggling was | |
1114 | * performed. | |
1115 | * | |
b4f85443 JB |
1116 | * Consider ctx1..3, link1..6, each ctx has 2 |
1117 | * links. link1 and link2 from ctx1 request new | |
5bcae31d MK |
1118 | * different chandefs starting 2 in-place |
1119 | * reserations with ctx4 and ctx5 replacing | |
b4f85443 JB |
1120 | * ctx1 and ctx2 respectively. Next link5 and |
1121 | * link6 from ctx3 reserve ctx4. If link3 and | |
1122 | * link4 remain on ctx2 as they are then this | |
5bcae31d MK |
1123 | * fails unless `replace_ctx` from ctx5 is |
1124 | * replaced with ctx3. | |
1125 | */ | |
1126 | list_for_each_entry(ctx, &local->chanctx_list, | |
1127 | list) { | |
1128 | if (ctx->replace_state != | |
1129 | IEEE80211_CHANCTX_REPLACE_NONE) | |
1130 | continue; | |
1131 | ||
b4f85443 | 1132 | if (!list_empty(&ctx->reserved_links)) |
5bcae31d MK |
1133 | continue; |
1134 | ||
1135 | curr_ctx = ctx; | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * If that's true then all available contexts already | |
1142 | * have reservations and cannot be used. | |
1143 | */ | |
1144 | if (!curr_ctx || | |
1145 | (curr_ctx->replace_state == | |
1146 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
b4f85443 | 1147 | !list_empty(&curr_ctx->reserved_links)) |
5bcae31d MK |
1148 | return -EBUSY; |
1149 | ||
1150 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
1151 | if (!new_ctx) | |
1152 | return -ENOMEM; | |
1153 | ||
1154 | new_ctx->replace_ctx = curr_ctx; | |
1155 | new_ctx->replace_state = | |
1156 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
1157 | ||
1158 | curr_ctx->replace_ctx = new_ctx; | |
1159 | curr_ctx->replace_state = | |
1160 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
1161 | ||
1162 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
1163 | } |
1164 | } | |
1165 | ||
b4f85443 JB |
1166 | list_add(&link->reserved_chanctx_list, &new_ctx->reserved_links); |
1167 | link->reserved_chanctx = new_ctx; | |
1168 | link->reserved_chandef = *chandef; | |
1169 | link->reserved_radar_required = radar_required; | |
1170 | link->reserved_ready = false; | |
5bcae31d MK |
1171 | |
1172 | return 0; | |
11335a55 LC |
1173 | } |
1174 | ||
03078de4 | 1175 | static void |
b4f85443 | 1176 | ieee80211_link_chanctx_reservation_complete(struct ieee80211_link_data *link) |
03078de4 | 1177 | { |
b4f85443 JB |
1178 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1179 | ||
03078de4 MK |
1180 | switch (sdata->vif.type) { |
1181 | case NL80211_IFTYPE_ADHOC: | |
1182 | case NL80211_IFTYPE_AP: | |
1183 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 1184 | case NL80211_IFTYPE_OCB: |
03078de4 | 1185 | ieee80211_queue_work(&sdata->local->hw, |
b4f85443 | 1186 | &link->csa_finalize_work); |
03078de4 | 1187 | break; |
03078de4 | 1188 | case NL80211_IFTYPE_STATION: |
4c3ebc56 | 1189 | ieee80211_queue_work(&sdata->local->hw, |
5bd5666d | 1190 | &link->u.mgd.chswitch_work); |
4c3ebc56 MK |
1191 | break; |
1192 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
1193 | case NL80211_IFTYPE_AP_VLAN: |
1194 | case NL80211_IFTYPE_WDS: | |
1195 | case NL80211_IFTYPE_MONITOR: | |
1196 | case NL80211_IFTYPE_P2P_CLIENT: | |
1197 | case NL80211_IFTYPE_P2P_GO: | |
1198 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 1199 | case NL80211_IFTYPE_NAN: |
03078de4 MK |
1200 | case NUM_NL80211_IFTYPES: |
1201 | WARN_ON(1); | |
1202 | break; | |
1203 | } | |
1204 | } | |
1205 | ||
2967e031 | 1206 | static void |
b4f85443 JB |
1207 | ieee80211_link_update_chandef(struct ieee80211_link_data *link, |
1208 | const struct cfg80211_chan_def *chandef) | |
2967e031 | 1209 | { |
b4f85443 JB |
1210 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1211 | unsigned int link_id = link->link_id; | |
2967e031 FF |
1212 | struct ieee80211_sub_if_data *vlan; |
1213 | ||
d8675a63 | 1214 | link->conf->chandef = *chandef; |
2967e031 FF |
1215 | |
1216 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1217 | return; | |
1218 | ||
d8675a63 JB |
1219 | rcu_read_lock(); |
1220 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { | |
1221 | struct ieee80211_bss_conf *vlan_conf; | |
1222 | ||
1223 | vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); | |
1224 | if (WARN_ON(!vlan_conf)) | |
1225 | continue; | |
1226 | ||
1227 | vlan_conf->chandef = *chandef; | |
1228 | } | |
1229 | rcu_read_unlock(); | |
2967e031 FF |
1230 | } |
1231 | ||
5bcae31d | 1232 | static int |
b4f85443 | 1233 | ieee80211_link_use_reserved_reassign(struct ieee80211_link_data *link) |
11335a55 | 1234 | { |
b4f85443 | 1235 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1236 | struct ieee80211_bss_conf *link_conf = link->conf; |
11335a55 | 1237 | struct ieee80211_local *local = sdata->local; |
5bcae31d MK |
1238 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
1239 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1240 | const struct cfg80211_chan_def *chandef; | |
1241 | u32 changed = 0; | |
1242 | int err; | |
11335a55 LC |
1243 | |
1244 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 1245 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 1246 | |
b4f85443 JB |
1247 | new_ctx = link->reserved_chanctx; |
1248 | old_ctx = ieee80211_link_get_chanctx(link); | |
11335a55 | 1249 | |
b4f85443 | 1250 | if (WARN_ON(!link->reserved_ready)) |
5bcae31d | 1251 | return -EBUSY; |
73da7d5b | 1252 | |
5bcae31d MK |
1253 | if (WARN_ON(!new_ctx)) |
1254 | return -EINVAL; | |
1255 | ||
1256 | if (WARN_ON(!old_ctx)) | |
1257 | return -EINVAL; | |
1258 | ||
1259 | if (WARN_ON(new_ctx->replace_state == | |
1260 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1261 | return -EINVAL; | |
1262 | ||
1263 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
b4f85443 | 1264 | &link->reserved_chandef); |
5bcae31d MK |
1265 | if (WARN_ON(!chandef)) |
1266 | return -EINVAL; | |
1267 | ||
b4f85443 | 1268 | if (link_conf->chandef.width != link->reserved_chandef.width) |
d6c37509 | 1269 | changed = BSS_CHANGED_BANDWIDTH; |
44b72ca8 | 1270 | |
b4f85443 | 1271 | ieee80211_link_update_chandef(link, &link->reserved_chandef); |
bf45a242 | 1272 | |
d6c37509 | 1273 | ieee80211_change_chanctx(local, new_ctx, old_ctx, chandef); |
44b72ca8 | 1274 | |
5bcae31d MK |
1275 | vif_chsw[0].vif = &sdata->vif; |
1276 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1277 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
727eff4d | 1278 | vif_chsw[0].link_conf = link->conf; |
5bcae31d | 1279 | |
b4f85443 JB |
1280 | list_del(&link->reserved_chanctx_list); |
1281 | link->reserved_chanctx = NULL; | |
5bcae31d MK |
1282 | |
1283 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1284 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1285 | if (err) { | |
1286 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1287 | ieee80211_free_chanctx(local, new_ctx); | |
1288 | ||
03078de4 | 1289 | goto out; |
73da7d5b SW |
1290 | } |
1291 | ||
b4f85443 JB |
1292 | list_move(&link->assigned_chanctx_list, &new_ctx->assigned_links); |
1293 | rcu_assign_pointer(link_conf->chanctx_conf, &new_ctx->conf); | |
5bcae31d MK |
1294 | |
1295 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
b4f85443 | 1296 | __ieee80211_link_copy_chanctx_to_vlans(link, false); |
5bcae31d | 1297 | |
17c18bf8 JB |
1298 | ieee80211_check_fast_xmit_iface(sdata); |
1299 | ||
5bcae31d MK |
1300 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) |
1301 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1302 | |
d6c37509 | 1303 | ieee80211_recalc_chanctx_min_def(local, new_ctx); |
722ddb0d EG |
1304 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1305 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
722ddb0d | 1306 | |
5bcae31d | 1307 | if (changed) |
d8675a63 | 1308 | ieee80211_link_info_change_notify(sdata, link, changed); |
5bcae31d | 1309 | |
03078de4 | 1310 | out: |
b4f85443 | 1311 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1312 | return err; |
1313 | } | |
1314 | ||
1315 | static int | |
b4f85443 | 1316 | ieee80211_link_use_reserved_assign(struct ieee80211_link_data *link) |
5bcae31d | 1317 | { |
b4f85443 | 1318 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1319 | struct ieee80211_local *local = sdata->local; |
1320 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1321 | const struct cfg80211_chan_def *chandef; | |
1322 | int err; | |
1323 | ||
d8675a63 | 1324 | old_ctx = ieee80211_link_get_chanctx(link); |
b4f85443 | 1325 | new_ctx = link->reserved_chanctx; |
5bcae31d | 1326 | |
b4f85443 | 1327 | if (WARN_ON(!link->reserved_ready)) |
5bcae31d MK |
1328 | return -EINVAL; |
1329 | ||
1330 | if (WARN_ON(old_ctx)) | |
1331 | return -EINVAL; | |
1332 | ||
1333 | if (WARN_ON(!new_ctx)) | |
1334 | return -EINVAL; | |
1335 | ||
1336 | if (WARN_ON(new_ctx->replace_state == | |
1337 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1338 | return -EINVAL; | |
1339 | ||
1340 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
b4f85443 | 1341 | &link->reserved_chandef); |
5bcae31d MK |
1342 | if (WARN_ON(!chandef)) |
1343 | return -EINVAL; | |
1344 | ||
d6c37509 | 1345 | ieee80211_change_chanctx(local, new_ctx, new_ctx, chandef); |
bf45a242 | 1346 | |
b4f85443 JB |
1347 | list_del(&link->reserved_chanctx_list); |
1348 | link->reserved_chanctx = NULL; | |
11335a55 | 1349 | |
b4f85443 | 1350 | err = ieee80211_assign_link_chanctx(link, new_ctx); |
5bcae31d MK |
1351 | if (err) { |
1352 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1353 | ieee80211_free_chanctx(local, new_ctx); | |
1354 | ||
1355 | goto out; | |
1356 | } | |
1357 | ||
1358 | out: | |
b4f85443 | 1359 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1360 | return err; |
1361 | } | |
1362 | ||
1363 | static bool | |
b4f85443 | 1364 | ieee80211_link_has_in_place_reservation(struct ieee80211_link_data *link) |
5bcae31d | 1365 | { |
b4f85443 | 1366 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1367 | struct ieee80211_chanctx *old_ctx, *new_ctx; |
1368 | ||
1369 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1370 | ||
b4f85443 JB |
1371 | new_ctx = link->reserved_chanctx; |
1372 | old_ctx = ieee80211_link_get_chanctx(link); | |
5bcae31d MK |
1373 | |
1374 | if (!old_ctx) | |
1375 | return false; | |
1376 | ||
1377 | if (WARN_ON(!new_ctx)) | |
1378 | return false; | |
1379 | ||
1380 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1381 | return false; | |
1382 | ||
1383 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1384 | return false; | |
1385 | ||
1386 | return true; | |
1387 | } | |
1388 | ||
1389 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1390 | struct ieee80211_chanctx *new_ctx) | |
1391 | { | |
1392 | const struct cfg80211_chan_def *chandef; | |
1393 | ||
1394 | lockdep_assert_held(&local->mtx); | |
1395 | lockdep_assert_held(&local->chanctx_mtx); | |
1396 | ||
1397 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1398 | if (WARN_ON(!chandef)) | |
1399 | return -EINVAL; | |
1400 | ||
1401 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1402 | local->_oper_chandef = *chandef; | |
1403 | ieee80211_hw_config(local, 0); | |
1404 | ||
1405 | return 0; | |
1406 | } | |
1407 | ||
1408 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1409 | int n_vifs) | |
1410 | { | |
1411 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
b4f85443 | 1412 | struct ieee80211_link_data *link; |
5bcae31d MK |
1413 | struct ieee80211_chanctx *ctx, *old_ctx; |
1414 | int i, err; | |
1415 | ||
1416 | lockdep_assert_held(&local->mtx); | |
1417 | lockdep_assert_held(&local->chanctx_mtx); | |
1418 | ||
6396bb22 | 1419 | vif_chsw = kcalloc(n_vifs, sizeof(vif_chsw[0]), GFP_KERNEL); |
5bcae31d MK |
1420 | if (!vif_chsw) |
1421 | return -ENOMEM; | |
1422 | ||
1423 | i = 0; | |
1424 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1425 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1426 | continue; | |
1427 | ||
1428 | if (WARN_ON(!ctx->replace_ctx)) { | |
1429 | err = -EINVAL; | |
5d52ee81 LC |
1430 | goto out; |
1431 | } | |
11335a55 | 1432 | |
b4f85443 | 1433 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1434 | reserved_chanctx_list) { |
b4f85443 | 1435 | if (!ieee80211_link_has_in_place_reservation(link)) |
5bcae31d MK |
1436 | continue; |
1437 | ||
b4f85443 JB |
1438 | old_ctx = ieee80211_link_get_chanctx(link); |
1439 | vif_chsw[i].vif = &link->sdata->vif; | |
5bcae31d MK |
1440 | vif_chsw[i].old_ctx = &old_ctx->conf; |
1441 | vif_chsw[i].new_ctx = &ctx->conf; | |
727eff4d | 1442 | vif_chsw[i].link_conf = link->conf; |
5bcae31d MK |
1443 | |
1444 | i++; | |
1445 | } | |
5d52ee81 | 1446 | } |
11335a55 | 1447 | |
5bcae31d MK |
1448 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1449 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1450 | |
11335a55 | 1451 | out: |
5bcae31d MK |
1452 | kfree(vif_chsw); |
1453 | return err; | |
1454 | } | |
1455 | ||
1456 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1457 | { | |
1458 | struct ieee80211_chanctx *ctx; | |
1459 | int err; | |
1460 | ||
1461 | lockdep_assert_held(&local->mtx); | |
1462 | lockdep_assert_held(&local->chanctx_mtx); | |
1463 | ||
1464 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1465 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1466 | continue; | |
1467 | ||
b4f85443 | 1468 | if (!list_empty(&ctx->replace_ctx->assigned_links)) |
5bcae31d MK |
1469 | continue; |
1470 | ||
1471 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1472 | err = ieee80211_add_chanctx(local, ctx); | |
1473 | if (err) | |
1474 | goto err; | |
1475 | } | |
1476 | ||
1477 | return 0; | |
1478 | ||
1479 | err: | |
1480 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1481 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1482 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1483 | continue; | |
1484 | ||
b4f85443 | 1485 | if (!list_empty(&ctx->replace_ctx->assigned_links)) |
5bcae31d MK |
1486 | continue; |
1487 | ||
1488 | ieee80211_del_chanctx(local, ctx); | |
1489 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1490 | } | |
1491 | ||
1492 | return err; | |
1493 | } | |
1494 | ||
649b2a4d | 1495 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d | 1496 | { |
5bcae31d MK |
1497 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; |
1498 | struct ieee80211_chanctx *new_ctx = NULL; | |
b7f2405c | 1499 | int err, n_assigned, n_reserved, n_ready; |
5bcae31d MK |
1500 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; |
1501 | ||
1502 | lockdep_assert_held(&local->mtx); | |
1503 | lockdep_assert_held(&local->chanctx_mtx); | |
1504 | ||
1505 | /* | |
1506 | * If there are 2 independent pairs of channel contexts performing | |
1507 | * cross-switch of their vifs this code will still wait until both are | |
1508 | * ready even though it could be possible to switch one before the | |
1509 | * other is ready. | |
1510 | * | |
1511 | * For practical reasons and code simplicity just do a single huge | |
1512 | * switch. | |
1513 | */ | |
1514 | ||
1515 | /* | |
1516 | * Verify if the reservation is still feasible. | |
1517 | * - if it's not then disconnect | |
1518 | * - if it is but not all vifs necessary are ready then defer | |
1519 | */ | |
1520 | ||
1521 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
b4f85443 JB |
1522 | struct ieee80211_link_data *link; |
1523 | ||
5bcae31d MK |
1524 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1525 | continue; | |
1526 | ||
1527 | if (WARN_ON(!ctx->replace_ctx)) { | |
1528 | err = -EINVAL; | |
1529 | goto err; | |
1530 | } | |
1531 | ||
1532 | if (!local->use_chanctx) | |
1533 | new_ctx = ctx; | |
1534 | ||
1535 | n_ctx++; | |
1536 | ||
1537 | n_assigned = 0; | |
1538 | n_reserved = 0; | |
1539 | n_ready = 0; | |
1540 | ||
b4f85443 | 1541 | list_for_each_entry(link, &ctx->replace_ctx->assigned_links, |
5bcae31d MK |
1542 | assigned_chanctx_list) { |
1543 | n_assigned++; | |
b4f85443 | 1544 | if (link->reserved_chanctx) { |
5bcae31d | 1545 | n_reserved++; |
b4f85443 | 1546 | if (link->reserved_ready) |
5bcae31d MK |
1547 | n_ready++; |
1548 | } | |
1549 | } | |
1550 | ||
1551 | if (n_assigned != n_reserved) { | |
1552 | if (n_ready == n_reserved) { | |
1553 | wiphy_info(local->hw.wiphy, | |
1554 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1555 | err = -EBUSY; | |
1556 | goto err; | |
1557 | } | |
1558 | ||
1559 | return -EAGAIN; | |
1560 | } | |
1561 | ||
1562 | ctx->conf.radar_enabled = false; | |
b4f85443 | 1563 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1564 | reserved_chanctx_list) { |
b4f85443 JB |
1565 | if (ieee80211_link_has_in_place_reservation(link) && |
1566 | !link->reserved_ready) | |
5bcae31d MK |
1567 | return -EAGAIN; |
1568 | ||
b4f85443 | 1569 | old_ctx = ieee80211_link_get_chanctx(link); |
5bcae31d MK |
1570 | if (old_ctx) { |
1571 | if (old_ctx->replace_state == | |
1572 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1573 | n_vifs_switch++; | |
1574 | else | |
1575 | n_vifs_assign++; | |
1576 | } else { | |
1577 | n_vifs_ctxless++; | |
1578 | } | |
1579 | ||
b4f85443 | 1580 | if (link->reserved_radar_required) |
5bcae31d MK |
1581 | ctx->conf.radar_enabled = true; |
1582 | } | |
1583 | } | |
1584 | ||
1585 | if (WARN_ON(n_ctx == 0) || | |
1586 | WARN_ON(n_vifs_switch == 0 && | |
1587 | n_vifs_assign == 0 && | |
1588 | n_vifs_ctxless == 0) || | |
1589 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1590 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1591 | err = -EINVAL; | |
1592 | goto err; | |
1593 | } | |
1594 | ||
1595 | /* | |
1596 | * All necessary vifs are ready. Perform the switch now depending on | |
1597 | * reservations and driver capabilities. | |
1598 | */ | |
1599 | ||
1600 | if (local->use_chanctx) { | |
1601 | if (n_vifs_switch > 0) { | |
1602 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1603 | if (err) | |
1604 | goto err; | |
1605 | } | |
1606 | ||
1607 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1608 | err = ieee80211_chsw_switch_ctxs(local); | |
1609 | if (err) | |
1610 | goto err; | |
1611 | } | |
1612 | } else { | |
1613 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1614 | if (err) | |
1615 | goto err; | |
1616 | } | |
1617 | ||
1618 | /* | |
1619 | * Update all structures, values and pointers to point to new channel | |
1620 | * context(s). | |
1621 | */ | |
5bcae31d | 1622 | list_for_each_entry(ctx, &local->chanctx_list, list) { |
b4f85443 JB |
1623 | struct ieee80211_link_data *link, *link_tmp; |
1624 | ||
5bcae31d MK |
1625 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1626 | continue; | |
1627 | ||
1628 | if (WARN_ON(!ctx->replace_ctx)) { | |
1629 | err = -EINVAL; | |
1630 | goto err; | |
1631 | } | |
1632 | ||
b4f85443 | 1633 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1634 | reserved_chanctx_list) { |
b4f85443 | 1635 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1636 | struct ieee80211_bss_conf *link_conf = link->conf; |
5bcae31d MK |
1637 | u32 changed = 0; |
1638 | ||
b4f85443 | 1639 | if (!ieee80211_link_has_in_place_reservation(link)) |
5bcae31d MK |
1640 | continue; |
1641 | ||
b4f85443 | 1642 | rcu_assign_pointer(link_conf->chanctx_conf, |
d0a9123e | 1643 | &ctx->conf); |
5bcae31d MK |
1644 | |
1645 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
b4f85443 JB |
1646 | __ieee80211_link_copy_chanctx_to_vlans(link, |
1647 | false); | |
5bcae31d | 1648 | |
17c18bf8 JB |
1649 | ieee80211_check_fast_xmit_iface(sdata); |
1650 | ||
b4f85443 | 1651 | link->radar_required = link->reserved_radar_required; |
5bcae31d | 1652 | |
b4f85443 | 1653 | if (link_conf->chandef.width != link->reserved_chandef.width) |
5bcae31d MK |
1654 | changed = BSS_CHANGED_BANDWIDTH; |
1655 | ||
b4f85443 | 1656 | ieee80211_link_update_chandef(link, &link->reserved_chandef); |
5bcae31d | 1657 | if (changed) |
b4f85443 | 1658 | ieee80211_link_info_change_notify(sdata, |
d8675a63 | 1659 | link, |
7b7090b4 | 1660 | changed); |
5bcae31d | 1661 | |
db82d8a9 | 1662 | ieee80211_recalc_txpower(sdata, false); |
5bcae31d MK |
1663 | } |
1664 | ||
1665 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1666 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1667 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1668 | ieee80211_recalc_chanctx_min_def(local, ctx); | |
1669 | ||
b4f85443 | 1670 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
5bcae31d | 1671 | reserved_chanctx_list) { |
b4f85443 | 1672 | if (ieee80211_link_get_chanctx(link) != ctx) |
5bcae31d MK |
1673 | continue; |
1674 | ||
b4f85443 JB |
1675 | list_del(&link->reserved_chanctx_list); |
1676 | list_move(&link->assigned_chanctx_list, | |
1677 | &ctx->assigned_links); | |
1678 | link->reserved_chanctx = NULL; | |
03078de4 | 1679 | |
b4f85443 | 1680 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1681 | } |
1682 | ||
1683 | /* | |
1684 | * This context might have been a dependency for an already | |
1685 | * ready re-assign reservation interface that was deferred. Do | |
1686 | * not propagate error to the caller though. The in-place | |
1687 | * reservation for originally requested interface has already | |
1688 | * succeeded at this point. | |
1689 | */ | |
b4f85443 | 1690 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
5bcae31d | 1691 | reserved_chanctx_list) { |
b4f85443 | 1692 | if (WARN_ON(ieee80211_link_has_in_place_reservation(link))) |
5bcae31d MK |
1693 | continue; |
1694 | ||
b4f85443 | 1695 | if (WARN_ON(link->reserved_chanctx != ctx)) |
5bcae31d MK |
1696 | continue; |
1697 | ||
b4f85443 | 1698 | if (!link->reserved_ready) |
5bcae31d MK |
1699 | continue; |
1700 | ||
b4f85443 JB |
1701 | if (ieee80211_link_get_chanctx(link)) |
1702 | err = ieee80211_link_use_reserved_reassign(link); | |
5bcae31d | 1703 | else |
b4f85443 | 1704 | err = ieee80211_link_use_reserved_assign(link); |
5bcae31d MK |
1705 | |
1706 | if (err) { | |
b4f85443 JB |
1707 | link_info(link, |
1708 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1709 | err); | |
1710 | ieee80211_link_unreserve_chanctx(link); | |
5bcae31d | 1711 | cfg80211_stop_iface(local->hw.wiphy, |
b4f85443 | 1712 | &link->sdata->wdev, |
5bcae31d MK |
1713 | GFP_KERNEL); |
1714 | } | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * Finally free old contexts | |
1720 | */ | |
1721 | ||
1722 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1723 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1724 | continue; | |
1725 | ||
1726 | ctx->replace_ctx->replace_ctx = NULL; | |
1727 | ctx->replace_ctx->replace_state = | |
1728 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1729 | ||
1730 | list_del_rcu(&ctx->list); | |
1731 | kfree_rcu(ctx, rcu_head); | |
1732 | } | |
1733 | ||
1734 | return 0; | |
1735 | ||
1736 | err: | |
1737 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
b4f85443 JB |
1738 | struct ieee80211_link_data *link, *link_tmp; |
1739 | ||
5bcae31d MK |
1740 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1741 | continue; | |
1742 | ||
b4f85443 | 1743 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
03078de4 | 1744 | reserved_chanctx_list) { |
b4f85443 JB |
1745 | ieee80211_link_unreserve_chanctx(link); |
1746 | ieee80211_link_chanctx_reservation_complete(link); | |
03078de4 | 1747 | } |
5bcae31d MK |
1748 | } |
1749 | ||
1750 | return err; | |
1751 | } | |
1752 | ||
b4f85443 | 1753 | static void __ieee80211_link_release_channel(struct ieee80211_link_data *link) |
649b2a4d | 1754 | { |
b4f85443 | 1755 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1756 | struct ieee80211_bss_conf *link_conf = link->conf; |
649b2a4d JB |
1757 | struct ieee80211_local *local = sdata->local; |
1758 | struct ieee80211_chanctx_conf *conf; | |
1759 | struct ieee80211_chanctx *ctx; | |
1760 | bool use_reserved_switch = false; | |
1761 | ||
1762 | lockdep_assert_held(&local->chanctx_mtx); | |
1763 | ||
b4f85443 | 1764 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
649b2a4d JB |
1765 | lockdep_is_held(&local->chanctx_mtx)); |
1766 | if (!conf) | |
1767 | return; | |
1768 | ||
1769 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1770 | ||
b4f85443 JB |
1771 | if (link->reserved_chanctx) { |
1772 | if (link->reserved_chanctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && | |
1773 | ieee80211_chanctx_num_reserved(local, link->reserved_chanctx) > 1) | |
649b2a4d JB |
1774 | use_reserved_switch = true; |
1775 | ||
b4f85443 | 1776 | ieee80211_link_unreserve_chanctx(link); |
649b2a4d JB |
1777 | } |
1778 | ||
b4f85443 | 1779 | ieee80211_assign_link_chanctx(link, NULL); |
649b2a4d JB |
1780 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
1781 | ieee80211_free_chanctx(local, ctx); | |
1782 | ||
b4f85443 | 1783 | link->radar_required = false; |
104f5a62 | 1784 | |
649b2a4d JB |
1785 | /* Unreserving may ready an in-place reservation. */ |
1786 | if (use_reserved_switch) | |
1787 | ieee80211_vif_use_reserved_switch(local); | |
1788 | } | |
1789 | ||
b4f85443 JB |
1790 | int ieee80211_link_use_channel(struct ieee80211_link_data *link, |
1791 | const struct cfg80211_chan_def *chandef, | |
1792 | enum ieee80211_chanctx_mode mode) | |
649b2a4d | 1793 | { |
b4f85443 | 1794 | struct ieee80211_sub_if_data *sdata = link->sdata; |
649b2a4d JB |
1795 | struct ieee80211_local *local = sdata->local; |
1796 | struct ieee80211_chanctx *ctx; | |
1797 | u8 radar_detect_width = 0; | |
1798 | int ret; | |
1799 | ||
1800 | lockdep_assert_held(&local->mtx); | |
1801 | ||
efe9c2bf JB |
1802 | if (sdata->vif.active_links && |
1803 | !(sdata->vif.active_links & BIT(link->link_id))) { | |
1804 | ieee80211_link_update_chandef(link, chandef); | |
1805 | return 0; | |
1806 | } | |
1807 | ||
649b2a4d JB |
1808 | mutex_lock(&local->chanctx_mtx); |
1809 | ||
1810 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1811 | chandef, | |
1812 | sdata->wdev.iftype); | |
1813 | if (ret < 0) | |
1814 | goto out; | |
1815 | if (ret > 0) | |
1816 | radar_detect_width = BIT(chandef->width); | |
1817 | ||
d8675a63 | 1818 | link->radar_required = ret; |
649b2a4d JB |
1819 | |
1820 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1821 | radar_detect_width); | |
1822 | if (ret < 0) | |
1823 | goto out; | |
1824 | ||
b4f85443 | 1825 | __ieee80211_link_release_channel(link); |
649b2a4d JB |
1826 | |
1827 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1828 | if (!ctx) | |
1829 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1830 | if (IS_ERR(ctx)) { | |
1831 | ret = PTR_ERR(ctx); | |
1832 | goto out; | |
1833 | } | |
1834 | ||
b4f85443 | 1835 | ieee80211_link_update_chandef(link, chandef); |
649b2a4d | 1836 | |
b4f85443 | 1837 | ret = ieee80211_assign_link_chanctx(link, ctx); |
649b2a4d JB |
1838 | if (ret) { |
1839 | /* if assign fails refcount stays the same */ | |
1840 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1841 | ieee80211_free_chanctx(local, ctx); | |
1842 | goto out; | |
1843 | } | |
1844 | ||
1845 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1846 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1847 | out: | |
104f5a62 | 1848 | if (ret) |
b4f85443 | 1849 | link->radar_required = false; |
104f5a62 | 1850 | |
649b2a4d JB |
1851 | mutex_unlock(&local->chanctx_mtx); |
1852 | return ret; | |
1853 | } | |
1854 | ||
b4f85443 | 1855 | int ieee80211_link_use_reserved_context(struct ieee80211_link_data *link) |
5bcae31d | 1856 | { |
b4f85443 | 1857 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1858 | struct ieee80211_local *local = sdata->local; |
1859 | struct ieee80211_chanctx *new_ctx; | |
1860 | struct ieee80211_chanctx *old_ctx; | |
1861 | int err; | |
1862 | ||
1863 | lockdep_assert_held(&local->mtx); | |
1864 | lockdep_assert_held(&local->chanctx_mtx); | |
1865 | ||
b4f85443 JB |
1866 | new_ctx = link->reserved_chanctx; |
1867 | old_ctx = ieee80211_link_get_chanctx(link); | |
5bcae31d MK |
1868 | |
1869 | if (WARN_ON(!new_ctx)) | |
1870 | return -EINVAL; | |
1871 | ||
1872 | if (WARN_ON(new_ctx->replace_state == | |
1873 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1874 | return -EINVAL; | |
1875 | ||
b4f85443 | 1876 | if (WARN_ON(link->reserved_ready)) |
5bcae31d MK |
1877 | return -EINVAL; |
1878 | ||
b4f85443 | 1879 | link->reserved_ready = true; |
5bcae31d MK |
1880 | |
1881 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1882 | if (old_ctx) | |
b4f85443 | 1883 | return ieee80211_link_use_reserved_reassign(link); |
5bcae31d | 1884 | |
b4f85443 | 1885 | return ieee80211_link_use_reserved_assign(link); |
5bcae31d MK |
1886 | } |
1887 | ||
1888 | /* | |
1889 | * In-place reservation may need to be finalized now either if: | |
1890 | * a) sdata is taking part in the swapping itself and is the last one | |
1891 | * b) sdata has switched with a re-assign reservation to an existing | |
1892 | * context readying in-place switching of old_ctx | |
1893 | * | |
1894 | * In case of (b) do not propagate the error up because the requested | |
1895 | * sdata already switched successfully. Just spill an extra warning. | |
1896 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1897 | * interfaces upon failure. | |
1898 | */ | |
1899 | if ((old_ctx && | |
1900 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1901 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1902 | err = ieee80211_vif_use_reserved_switch(local); | |
1903 | if (err && err != -EAGAIN) { | |
1904 | if (new_ctx->replace_state == | |
1905 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1906 | return err; | |
1907 | ||
1908 | wiphy_info(local->hw.wiphy, | |
1909 | "depending in-place reservation failed (err=%d)\n", | |
1910 | err); | |
1911 | } | |
1912 | } | |
1913 | ||
1914 | return 0; | |
73da7d5b SW |
1915 | } |
1916 | ||
b4f85443 JB |
1917 | int ieee80211_link_change_bandwidth(struct ieee80211_link_data *link, |
1918 | const struct cfg80211_chan_def *chandef, | |
aa87cd8b | 1919 | u64 *changed) |
2c9b7359 | 1920 | { |
b4f85443 | 1921 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1922 | struct ieee80211_bss_conf *link_conf = link->conf; |
2c9b7359 JB |
1923 | struct ieee80211_local *local = sdata->local; |
1924 | struct ieee80211_chanctx_conf *conf; | |
1925 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1926 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1927 | int ret; |
1928 | ||
1929 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1930 | IEEE80211_CHAN_DISABLED)) | |
1931 | return -EINVAL; | |
1932 | ||
1933 | mutex_lock(&local->chanctx_mtx); | |
b4f85443 | 1934 | if (cfg80211_chandef_identical(chandef, &link_conf->chandef)) { |
2c9b7359 JB |
1935 | ret = 0; |
1936 | goto out; | |
1937 | } | |
1938 | ||
1939 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
b4f85443 | 1940 | link_conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { |
2c9b7359 JB |
1941 | ret = -EINVAL; |
1942 | goto out; | |
1943 | } | |
1944 | ||
b4f85443 | 1945 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
2c9b7359 JB |
1946 | lockdep_is_held(&local->chanctx_mtx)); |
1947 | if (!conf) { | |
1948 | ret = -EINVAL; | |
1949 | goto out; | |
1950 | } | |
1951 | ||
1952 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1953 | |
1954 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1955 | if (!compat) { | |
2c9b7359 JB |
1956 | ret = -EINVAL; |
1957 | goto out; | |
1958 | } | |
1959 | ||
5bcae31d MK |
1960 | switch (ctx->replace_state) { |
1961 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1962 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1963 | ret = -EBUSY; | |
1964 | goto out; | |
1965 | } | |
1966 | break; | |
1967 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1968 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1969 | * reservation itself? */ |
1970 | ret = -EBUSY; | |
1971 | goto out; | |
1972 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1973 | /* channel context that is going to replace another channel | |
1974 | * context doesn't really exist and shouldn't be assigned | |
1975 | * anywhere yet */ | |
1976 | WARN_ON(1); | |
1977 | break; | |
1978 | } | |
1979 | ||
b4f85443 | 1980 | ieee80211_link_update_chandef(link, chandef); |
2c9b7359 JB |
1981 | |
1982 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1983 | ||
1984 | *changed |= BSS_CHANGED_BANDWIDTH; | |
1985 | ret = 0; | |
1986 | out: | |
1987 | mutex_unlock(&local->chanctx_mtx); | |
1988 | return ret; | |
1989 | } | |
1990 | ||
b4f85443 | 1991 | void ieee80211_link_release_channel(struct ieee80211_link_data *link) |
d01a1e65 | 1992 | { |
b4f85443 JB |
1993 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1994 | ||
d01a1e65 | 1995 | mutex_lock(&sdata->local->chanctx_mtx); |
939c4c7e JB |
1996 | if (rcu_access_pointer(link->conf->chanctx_conf)) { |
1997 | lockdep_assert_held(&sdata->local->mtx); | |
1998 | __ieee80211_link_release_channel(link); | |
1999 | } | |
d01a1e65 MK |
2000 | mutex_unlock(&sdata->local->chanctx_mtx); |
2001 | } | |
3448c005 | 2002 | |
b4f85443 | 2003 | void ieee80211_link_vlan_copy_chanctx(struct ieee80211_link_data *link) |
4d76d21b | 2004 | { |
b4f85443 JB |
2005 | struct ieee80211_sub_if_data *sdata = link->sdata; |
2006 | unsigned int link_id = link->link_id; | |
d8675a63 JB |
2007 | struct ieee80211_bss_conf *link_conf = link->conf; |
2008 | struct ieee80211_bss_conf *ap_conf; | |
4d76d21b JB |
2009 | struct ieee80211_local *local = sdata->local; |
2010 | struct ieee80211_sub_if_data *ap; | |
2011 | struct ieee80211_chanctx_conf *conf; | |
2012 | ||
2013 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
2014 | return; | |
2015 | ||
2016 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
2017 | ||
2018 | mutex_lock(&local->chanctx_mtx); | |
2019 | ||
d8675a63 JB |
2020 | rcu_read_lock(); |
2021 | ap_conf = rcu_dereference(ap->vif.link_conf[link_id]); | |
2022 | conf = rcu_dereference_protected(ap_conf->chanctx_conf, | |
4d76d21b | 2023 | lockdep_is_held(&local->chanctx_mtx)); |
b4f85443 | 2024 | rcu_assign_pointer(link_conf->chanctx_conf, conf); |
d8675a63 | 2025 | rcu_read_unlock(); |
4d76d21b JB |
2026 | mutex_unlock(&local->chanctx_mtx); |
2027 | } | |
2028 | ||
3448c005 JB |
2029 | void ieee80211_iter_chan_contexts_atomic( |
2030 | struct ieee80211_hw *hw, | |
2031 | void (*iter)(struct ieee80211_hw *hw, | |
2032 | struct ieee80211_chanctx_conf *chanctx_conf, | |
2033 | void *data), | |
2034 | void *iter_data) | |
2035 | { | |
2036 | struct ieee80211_local *local = hw_to_local(hw); | |
2037 | struct ieee80211_chanctx *ctx; | |
2038 | ||
2039 | rcu_read_lock(); | |
2040 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
2041 | if (ctx->driver_present) |
2042 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
2043 | rcu_read_unlock(); |
2044 | } | |
2045 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |