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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 | 260 | ieee80211_get_chanctx_vif_max_required_bw(struct ieee80211_sub_if_data *sdata, |
b72a455a JB |
261 | struct ieee80211_chanctx *ctx, |
262 | struct ieee80211_link_data *rsvd_for) | |
21f659bf | 263 | { |
21f659bf | 264 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; |
b4f85443 JB |
265 | struct ieee80211_vif *vif = &sdata->vif; |
266 | int link_id; | |
21f659bf | 267 | |
d8675a63 | 268 | rcu_read_lock(); |
b4f85443 | 269 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
21f659bf | 270 | enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT; |
b72a455a JB |
271 | struct ieee80211_link_data *link = |
272 | rcu_dereference(sdata->link[link_id]); | |
21f659bf | 273 | |
b72a455a | 274 | if (!link) |
21f659bf EP |
275 | continue; |
276 | ||
b72a455a JB |
277 | if (link != rsvd_for && |
278 | rcu_access_pointer(link->conf->chanctx_conf) != &ctx->conf) | |
21f659bf EP |
279 | continue; |
280 | ||
281 | switch (vif->type) { | |
282 | case NL80211_IFTYPE_AP: | |
283 | case NL80211_IFTYPE_AP_VLAN: | |
b4f85443 | 284 | width = ieee80211_get_max_required_bw(sdata, link_id); |
21f659bf | 285 | break; |
0fabfaaf AN |
286 | case NL80211_IFTYPE_STATION: |
287 | /* | |
288 | * The ap's sta->bandwidth is not set yet at this | |
289 | * point, so take the width from the chandef, but | |
290 | * account also for TDLS peers | |
291 | */ | |
b72a455a | 292 | width = max(link->conf->chandef.width, |
b4f85443 | 293 | ieee80211_get_max_required_bw(sdata, link_id)); |
0fabfaaf | 294 | break; |
21f659bf | 295 | case NL80211_IFTYPE_P2P_DEVICE: |
cb3b7d87 | 296 | case NL80211_IFTYPE_NAN: |
21f659bf | 297 | continue; |
21f659bf | 298 | case NL80211_IFTYPE_ADHOC: |
21f659bf | 299 | case NL80211_IFTYPE_MESH_POINT: |
6e0bd6c3 | 300 | case NL80211_IFTYPE_OCB: |
b72a455a | 301 | width = link->conf->chandef.width; |
21f659bf | 302 | break; |
70d9c599 | 303 | case NL80211_IFTYPE_WDS: |
21f659bf EP |
304 | case NL80211_IFTYPE_UNSPECIFIED: |
305 | case NUM_NL80211_IFTYPES: | |
306 | case NL80211_IFTYPE_MONITOR: | |
307 | case NL80211_IFTYPE_P2P_CLIENT: | |
308 | case NL80211_IFTYPE_P2P_GO: | |
309 | WARN_ON_ONCE(1); | |
310 | } | |
b4f85443 JB |
311 | |
312 | max_bw = max(max_bw, width); | |
313 | } | |
d8675a63 | 314 | rcu_read_unlock(); |
b4f85443 JB |
315 | |
316 | return max_bw; | |
317 | } | |
318 | ||
319 | static enum nl80211_chan_width | |
320 | ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local, | |
b72a455a JB |
321 | struct ieee80211_chanctx *ctx, |
322 | struct ieee80211_link_data *rsvd_for) | |
b4f85443 JB |
323 | { |
324 | struct ieee80211_sub_if_data *sdata; | |
325 | enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT; | |
326 | ||
327 | rcu_read_lock(); | |
328 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
329 | enum nl80211_chan_width width; | |
330 | ||
331 | if (!ieee80211_sdata_running(sdata)) | |
332 | continue; | |
333 | ||
b72a455a JB |
334 | width = ieee80211_get_chanctx_vif_max_required_bw(sdata, ctx, |
335 | rsvd_for); | |
b4f85443 | 336 | |
21f659bf EP |
337 | max_bw = max(max_bw, width); |
338 | } | |
1c37a72c EP |
339 | |
340 | /* use the configured bandwidth in case of monitor interface */ | |
341 | sdata = rcu_dereference(local->monitor_sdata); | |
b4f85443 | 342 | if (sdata && |
b72a455a JB |
343 | rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf) == &ctx->conf) |
344 | max_bw = max(max_bw, ctx->conf.def.width); | |
1c37a72c | 345 | |
21f659bf EP |
346 | rcu_read_unlock(); |
347 | ||
348 | return max_bw; | |
349 | } | |
350 | ||
351 | /* | |
352 | * recalc the min required chan width of the channel context, which is | |
353 | * the max of min required widths of all the interfaces bound to this | |
354 | * channel context. | |
355 | */ | |
b72a455a JB |
356 | static u32 |
357 | _ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
358 | struct ieee80211_chanctx *ctx, | |
359 | struct ieee80211_link_data *rsvd_for) | |
21f659bf EP |
360 | { |
361 | enum nl80211_chan_width max_bw; | |
362 | struct cfg80211_chan_def min_def; | |
363 | ||
364 | lockdep_assert_held(&local->chanctx_mtx); | |
365 | ||
df78a0c0 | 366 | /* don't optimize non-20MHz based and radar_enabled confs */ |
21f659bf EP |
367 | if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 || |
368 | ctx->conf.def.width == NL80211_CHAN_WIDTH_10 || | |
df78a0c0 TP |
369 | ctx->conf.def.width == NL80211_CHAN_WIDTH_1 || |
370 | ctx->conf.def.width == NL80211_CHAN_WIDTH_2 || | |
371 | ctx->conf.def.width == NL80211_CHAN_WIDTH_4 || | |
372 | ctx->conf.def.width == NL80211_CHAN_WIDTH_8 || | |
373 | ctx->conf.def.width == NL80211_CHAN_WIDTH_16 || | |
21f659bf EP |
374 | ctx->conf.radar_enabled) { |
375 | ctx->conf.min_def = ctx->conf.def; | |
d6c37509 | 376 | return 0; |
21f659bf EP |
377 | } |
378 | ||
b72a455a | 379 | max_bw = ieee80211_get_chanctx_max_required_bw(local, ctx, rsvd_for); |
21f659bf EP |
380 | |
381 | /* downgrade chandef up to max_bw */ | |
382 | min_def = ctx->conf.def; | |
383 | while (min_def.width > max_bw) | |
384 | ieee80211_chandef_downgrade(&min_def); | |
385 | ||
386 | if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def)) | |
d6c37509 | 387 | return 0; |
21f659bf EP |
388 | |
389 | ctx->conf.min_def = min_def; | |
390 | if (!ctx->driver_present) | |
d6c37509 | 391 | return 0; |
21f659bf | 392 | |
d6c37509 | 393 | return IEEE80211_CHANCTX_CHANGE_MIN_WIDTH; |
21f659bf EP |
394 | } |
395 | ||
d6c37509 | 396 | /* calling this function is assuming that station vif is updated to |
b4f85443 | 397 | * lates changes by calling ieee80211_link_update_chandef |
d6c37509 | 398 | */ |
44b72ca8 | 399 | static void ieee80211_chan_bw_change(struct ieee80211_local *local, |
d6c37509 MG |
400 | struct ieee80211_chanctx *ctx, |
401 | bool narrowed) | |
44b72ca8 IP |
402 | { |
403 | struct sta_info *sta; | |
404 | struct ieee80211_supported_band *sband = | |
405 | local->hw.wiphy->bands[ctx->conf.def.chan->band]; | |
406 | ||
407 | rcu_read_lock(); | |
408 | list_for_each_entry_rcu(sta, &local->sta_list, | |
409 | list) { | |
b4f85443 | 410 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
44b72ca8 | 411 | enum ieee80211_sta_rx_bandwidth new_sta_bw; |
b4f85443 | 412 | unsigned int link_id; |
44b72ca8 IP |
413 | |
414 | if (!ieee80211_sdata_running(sta->sdata)) | |
415 | continue; | |
416 | ||
b4f85443 JB |
417 | for (link_id = 0; link_id < ARRAY_SIZE(sta->sdata->link); link_id++) { |
418 | struct ieee80211_bss_conf *link_conf = | |
d8675a63 | 419 | rcu_dereference(sdata->vif.link_conf[link_id]); |
c71420db | 420 | struct link_sta_info *link_sta; |
b4f85443 JB |
421 | |
422 | if (!link_conf) | |
423 | continue; | |
44b72ca8 | 424 | |
b4f85443 JB |
425 | if (rcu_access_pointer(link_conf->chanctx_conf) != &ctx->conf) |
426 | continue; | |
d6c37509 | 427 | |
c71420db JB |
428 | link_sta = rcu_dereference(sta->link[link_id]); |
429 | if (!link_sta) | |
430 | continue; | |
431 | ||
432 | new_sta_bw = ieee80211_sta_cur_vht_bw(link_sta); | |
44b72ca8 | 433 | |
b4f85443 | 434 | /* nothing change */ |
c71420db | 435 | if (new_sta_bw == link_sta->pub->bandwidth) |
b4f85443 JB |
436 | continue; |
437 | ||
438 | /* vif changed to narrow BW and narrow BW for station wasn't | |
439 | * requested or vise versa */ | |
c71420db | 440 | if ((new_sta_bw < link_sta->pub->bandwidth) == !narrowed) |
b4f85443 | 441 | continue; |
d6c37509 | 442 | |
c71420db | 443 | link_sta->pub->bandwidth = new_sta_bw; |
b4f85443 JB |
444 | rate_control_rate_update(local, sband, sta, link_id, |
445 | IEEE80211_RC_BW_CHANGED); | |
446 | } | |
44b72ca8 IP |
447 | } |
448 | rcu_read_unlock(); | |
449 | } | |
450 | ||
d6c37509 MG |
451 | /* |
452 | * recalc the min required chan width of the channel context, which is | |
453 | * the max of min required widths of all the interfaces bound to this | |
454 | * channel context. | |
455 | */ | |
456 | void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local, | |
b72a455a JB |
457 | struct ieee80211_chanctx *ctx, |
458 | struct ieee80211_link_data *rsvd_for) | |
23a85b45 | 459 | { |
b72a455a | 460 | u32 changed = _ieee80211_recalc_chanctx_min_def(local, ctx, rsvd_for); |
44b72ca8 | 461 | |
d6c37509 | 462 | if (!changed) |
e89a96f5 | 463 | return; |
0aaffa9b | 464 | |
d6c37509 MG |
465 | /* check is BW narrowed */ |
466 | ieee80211_chan_bw_change(local, ctx, true); | |
4bf88530 | 467 | |
d6c37509 MG |
468 | drv_change_chanctx(local, ctx, changed); |
469 | ||
470 | /* check is BW wider */ | |
471 | ieee80211_chan_bw_change(local, ctx, false); | |
472 | } | |
473 | ||
b72a455a JB |
474 | static void _ieee80211_change_chanctx(struct ieee80211_local *local, |
475 | struct ieee80211_chanctx *ctx, | |
476 | struct ieee80211_chanctx *old_ctx, | |
477 | const struct cfg80211_chan_def *chandef, | |
478 | struct ieee80211_link_data *rsvd_for) | |
d6c37509 MG |
479 | { |
480 | u32 changed; | |
44b72ca8 | 481 | |
5dca295d | 482 | /* expected to handle only 20/40/80/160/320 channel widths */ |
44b72ca8 IP |
483 | switch (chandef->width) { |
484 | case NL80211_CHAN_WIDTH_20_NOHT: | |
485 | case NL80211_CHAN_WIDTH_20: | |
486 | case NL80211_CHAN_WIDTH_40: | |
487 | case NL80211_CHAN_WIDTH_80: | |
488 | case NL80211_CHAN_WIDTH_80P80: | |
489 | case NL80211_CHAN_WIDTH_160: | |
5dca295d | 490 | case NL80211_CHAN_WIDTH_320: |
44b72ca8 IP |
491 | break; |
492 | default: | |
493 | WARN_ON(1); | |
494 | } | |
495 | ||
d6c37509 MG |
496 | /* Check maybe BW narrowed - we do this _before_ calling recalc_chanctx_min_def |
497 | * due to maybe not returning from it, e.g in case new context was added | |
498 | * first time with all parameters up to date. | |
499 | */ | |
500 | ieee80211_chan_bw_change(local, old_ctx, true); | |
501 | ||
502 | if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) { | |
b72a455a | 503 | ieee80211_recalc_chanctx_min_def(local, ctx, rsvd_for); |
d6c37509 MG |
504 | return; |
505 | } | |
44b72ca8 | 506 | |
d6c37509 MG |
507 | WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
508 | ||
509 | ctx->conf.def = *chandef; | |
510 | ||
511 | /* check if min chanctx also changed */ | |
512 | changed = IEEE80211_CHANCTX_CHANGE_WIDTH | | |
b72a455a | 513 | _ieee80211_recalc_chanctx_min_def(local, ctx, rsvd_for); |
d6c37509 | 514 | drv_change_chanctx(local, ctx, changed); |
55de908a JB |
515 | |
516 | if (!local->use_chanctx) { | |
675a0b04 | 517 | local->_oper_chandef = *chandef; |
55de908a JB |
518 | ieee80211_hw_config(local, 0); |
519 | } | |
44b72ca8 | 520 | |
d6c37509 MG |
521 | /* check is BW wider */ |
522 | ieee80211_chan_bw_change(local, old_ctx, false); | |
0aaffa9b | 523 | } |
d01a1e65 | 524 | |
b72a455a JB |
525 | static void ieee80211_change_chanctx(struct ieee80211_local *local, |
526 | struct ieee80211_chanctx *ctx, | |
527 | struct ieee80211_chanctx *old_ctx, | |
528 | const struct cfg80211_chan_def *chandef) | |
529 | { | |
530 | _ieee80211_change_chanctx(local, ctx, old_ctx, chandef, NULL); | |
531 | } | |
532 | ||
d01a1e65 MK |
533 | static struct ieee80211_chanctx * |
534 | ieee80211_find_chanctx(struct ieee80211_local *local, | |
4bf88530 | 535 | const struct cfg80211_chan_def *chandef, |
d01a1e65 MK |
536 | enum ieee80211_chanctx_mode mode) |
537 | { | |
538 | struct ieee80211_chanctx *ctx; | |
539 | ||
540 | lockdep_assert_held(&local->chanctx_mtx); | |
541 | ||
542 | if (mode == IEEE80211_CHANCTX_EXCLUSIVE) | |
543 | return NULL; | |
d01a1e65 MK |
544 | |
545 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
4bf88530 | 546 | const struct cfg80211_chan_def *compat; |
e89a96f5 | 547 | |
5bcae31d MK |
548 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
549 | continue; | |
550 | ||
d01a1e65 MK |
551 | if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
552 | continue; | |
4bf88530 JB |
553 | |
554 | compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); | |
555 | if (!compat) | |
d01a1e65 MK |
556 | continue; |
557 | ||
0288157b MK |
558 | compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
559 | compat); | |
560 | if (!compat) | |
561 | continue; | |
562 | ||
d6c37509 | 563 | ieee80211_change_chanctx(local, ctx, ctx, compat); |
e89a96f5 | 564 | |
d01a1e65 MK |
565 | return ctx; |
566 | } | |
567 | ||
568 | return NULL; | |
569 | } | |
570 | ||
5cbc95a7 | 571 | bool ieee80211_is_radar_required(struct ieee80211_local *local) |
e4746851 SW |
572 | { |
573 | struct ieee80211_sub_if_data *sdata; | |
574 | ||
cc901de1 MK |
575 | lockdep_assert_held(&local->mtx); |
576 | ||
e4746851 SW |
577 | rcu_read_lock(); |
578 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 JB |
579 | unsigned int link_id; |
580 | ||
581 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { | |
d8675a63 JB |
582 | struct ieee80211_link_data *link; |
583 | ||
584 | link = rcu_dereference(sdata->link[link_id]); | |
585 | ||
586 | if (link && link->radar_required) { | |
b4f85443 JB |
587 | rcu_read_unlock(); |
588 | return true; | |
589 | } | |
e4746851 SW |
590 | } |
591 | } | |
592 | rcu_read_unlock(); | |
593 | ||
594 | return false; | |
595 | } | |
596 | ||
e7f2337a EP |
597 | static bool |
598 | ieee80211_chanctx_radar_required(struct ieee80211_local *local, | |
599 | struct ieee80211_chanctx *ctx) | |
600 | { | |
601 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
602 | struct ieee80211_sub_if_data *sdata; | |
603 | bool required = false; | |
604 | ||
605 | lockdep_assert_held(&local->chanctx_mtx); | |
606 | lockdep_assert_held(&local->mtx); | |
607 | ||
608 | rcu_read_lock(); | |
609 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 JB |
610 | unsigned int link_id; |
611 | ||
e7f2337a EP |
612 | if (!ieee80211_sdata_running(sdata)) |
613 | continue; | |
b4f85443 | 614 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
d8675a63 | 615 | struct ieee80211_link_data *link; |
e7f2337a | 616 | |
d8675a63 JB |
617 | link = rcu_dereference(sdata->link[link_id]); |
618 | if (!link) | |
b4f85443 JB |
619 | continue; |
620 | ||
d8675a63 | 621 | if (rcu_access_pointer(link->conf->chanctx_conf) != conf) |
b4f85443 | 622 | continue; |
d8675a63 | 623 | if (!link->radar_required) |
b4f85443 JB |
624 | continue; |
625 | required = true; | |
626 | break; | |
627 | } | |
628 | ||
629 | if (required) | |
630 | break; | |
e7f2337a EP |
631 | } |
632 | rcu_read_unlock(); | |
633 | ||
634 | return required; | |
635 | } | |
636 | ||
d01a1e65 | 637 | static struct ieee80211_chanctx * |
ed68ebca MK |
638 | ieee80211_alloc_chanctx(struct ieee80211_local *local, |
639 | const struct cfg80211_chan_def *chandef, | |
640 | enum ieee80211_chanctx_mode mode) | |
d01a1e65 MK |
641 | { |
642 | struct ieee80211_chanctx *ctx; | |
643 | ||
644 | lockdep_assert_held(&local->chanctx_mtx); | |
645 | ||
646 | ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL); | |
647 | if (!ctx) | |
ed68ebca | 648 | return NULL; |
d01a1e65 | 649 | |
b4f85443 JB |
650 | INIT_LIST_HEAD(&ctx->assigned_links); |
651 | INIT_LIST_HEAD(&ctx->reserved_links); | |
4bf88530 | 652 | ctx->conf.def = *chandef; |
04ecd257 JB |
653 | ctx->conf.rx_chains_static = 1; |
654 | ctx->conf.rx_chains_dynamic = 1; | |
d01a1e65 | 655 | ctx->mode = mode; |
e7f2337a | 656 | ctx->conf.radar_enabled = false; |
b72a455a | 657 | _ieee80211_recalc_chanctx_min_def(local, ctx, NULL); |
ed68ebca MK |
658 | |
659 | return ctx; | |
660 | } | |
661 | ||
662 | static int ieee80211_add_chanctx(struct ieee80211_local *local, | |
663 | struct ieee80211_chanctx *ctx) | |
664 | { | |
665 | u32 changed; | |
666 | int err; | |
667 | ||
668 | lockdep_assert_held(&local->mtx); | |
669 | lockdep_assert_held(&local->chanctx_mtx); | |
670 | ||
e4746851 SW |
671 | if (!local->use_chanctx) |
672 | local->hw.conf.radar_enabled = ctx->conf.radar_enabled; | |
d01a1e65 | 673 | |
382a103b JB |
674 | /* turn idle off *before* setting channel -- some drivers need that */ |
675 | changed = ieee80211_idle_off(local); | |
676 | if (changed) | |
677 | ieee80211_hw_config(local, changed); | |
678 | ||
55de908a | 679 | if (!local->use_chanctx) { |
ed68ebca | 680 | local->_oper_chandef = ctx->conf.def; |
9b4816f5 | 681 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
682 | } else { |
683 | err = drv_add_chanctx(local, ctx); | |
684 | if (err) { | |
382a103b | 685 | ieee80211_recalc_idle(local); |
ed68ebca | 686 | return err; |
55de908a | 687 | } |
35f2fce9 MK |
688 | } |
689 | ||
ed68ebca MK |
690 | return 0; |
691 | } | |
692 | ||
693 | static struct ieee80211_chanctx * | |
694 | ieee80211_new_chanctx(struct ieee80211_local *local, | |
695 | const struct cfg80211_chan_def *chandef, | |
696 | enum ieee80211_chanctx_mode mode) | |
697 | { | |
698 | struct ieee80211_chanctx *ctx; | |
699 | int err; | |
d01a1e65 | 700 | |
ed68ebca MK |
701 | lockdep_assert_held(&local->mtx); |
702 | lockdep_assert_held(&local->chanctx_mtx); | |
d01a1e65 | 703 | |
ed68ebca MK |
704 | ctx = ieee80211_alloc_chanctx(local, chandef, mode); |
705 | if (!ctx) | |
706 | return ERR_PTR(-ENOMEM); | |
707 | ||
708 | err = ieee80211_add_chanctx(local, ctx); | |
709 | if (err) { | |
710 | kfree(ctx); | |
711 | return ERR_PTR(err); | |
712 | } | |
713 | ||
714 | list_add_rcu(&ctx->list, &local->chanctx_list); | |
d01a1e65 MK |
715 | return ctx; |
716 | } | |
717 | ||
1f0d54cd MK |
718 | static void ieee80211_del_chanctx(struct ieee80211_local *local, |
719 | struct ieee80211_chanctx *ctx) | |
d01a1e65 MK |
720 | { |
721 | lockdep_assert_held(&local->chanctx_mtx); | |
722 | ||
55de908a | 723 | if (!local->use_chanctx) { |
675a0b04 | 724 | struct cfg80211_chan_def *chandef = &local->_oper_chandef; |
5e480774 TP |
725 | /* S1G doesn't have 20MHz, so get the correct width for the |
726 | * current channel. | |
727 | */ | |
728 | if (chandef->chan->band == NL80211_BAND_S1GHZ) | |
729 | chandef->width = | |
730 | ieee80211_s1g_channel_width(chandef->chan); | |
731 | else | |
732 | chandef->width = NL80211_CHAN_WIDTH_20_NOHT; | |
675a0b04 | 733 | chandef->center_freq1 = chandef->chan->center_freq; |
b6011960 | 734 | chandef->freq1_offset = chandef->chan->freq_offset; |
675a0b04 | 735 | chandef->center_freq2 = 0; |
e4746851 SW |
736 | |
737 | /* NOTE: Disabling radar is only valid here for | |
738 | * single channel context. To be sure, check it ... | |
739 | */ | |
1f0d54cd MK |
740 | WARN_ON(local->hw.conf.radar_enabled && |
741 | !list_empty(&local->chanctx_list)); | |
742 | ||
e4746851 SW |
743 | local->hw.conf.radar_enabled = false; |
744 | ||
9b4816f5 | 745 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); |
55de908a JB |
746 | } else { |
747 | drv_remove_chanctx(local, ctx); | |
748 | } | |
35f2fce9 | 749 | |
fd0f979a | 750 | ieee80211_recalc_idle(local); |
d01a1e65 MK |
751 | } |
752 | ||
1f0d54cd MK |
753 | static void ieee80211_free_chanctx(struct ieee80211_local *local, |
754 | struct ieee80211_chanctx *ctx) | |
d01a1e65 | 755 | { |
d01a1e65 MK |
756 | lockdep_assert_held(&local->chanctx_mtx); |
757 | ||
c0166da9 | 758 | WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0); |
5bbe754d | 759 | |
1f0d54cd MK |
760 | list_del_rcu(&ctx->list); |
761 | ieee80211_del_chanctx(local, ctx); | |
762 | kfree_rcu(ctx, rcu_head); | |
d01a1e65 MK |
763 | } |
764 | ||
0fabfaaf AN |
765 | void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local, |
766 | struct ieee80211_chanctx *ctx) | |
e89a96f5 MK |
767 | { |
768 | struct ieee80211_chanctx_conf *conf = &ctx->conf; | |
769 | struct ieee80211_sub_if_data *sdata; | |
4bf88530 | 770 | const struct cfg80211_chan_def *compat = NULL; |
0fabfaaf | 771 | struct sta_info *sta; |
e89a96f5 MK |
772 | |
773 | lockdep_assert_held(&local->chanctx_mtx); | |
774 | ||
775 | rcu_read_lock(); | |
776 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
b4f85443 | 777 | int link_id; |
4bf88530 | 778 | |
e89a96f5 MK |
779 | if (!ieee80211_sdata_running(sdata)) |
780 | continue; | |
b4f85443 | 781 | |
0e67c136 FF |
782 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
783 | continue; | |
e89a96f5 | 784 | |
b4f85443 JB |
785 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
786 | struct ieee80211_bss_conf *link_conf = | |
d8675a63 | 787 | rcu_dereference(sdata->vif.link_conf[link_id]); |
4bf88530 | 788 | |
b4f85443 JB |
789 | if (!link_conf) |
790 | continue; | |
791 | ||
792 | if (rcu_access_pointer(link_conf->chanctx_conf) != conf) | |
793 | continue; | |
794 | ||
795 | if (!compat) | |
796 | compat = &link_conf->chandef; | |
797 | ||
798 | compat = cfg80211_chandef_compatible(&link_conf->chandef, | |
799 | compat); | |
800 | if (WARN_ON_ONCE(!compat)) | |
801 | break; | |
802 | } | |
e89a96f5 | 803 | } |
0fabfaaf | 804 | |
05050a2b A |
805 | if (WARN_ON_ONCE(!compat)) { |
806 | rcu_read_unlock(); | |
807 | return; | |
808 | } | |
809 | ||
0fabfaaf AN |
810 | /* TDLS peers can sometimes affect the chandef width */ |
811 | list_for_each_entry_rcu(sta, &local->sta_list, list) { | |
812 | if (!sta->uploaded || | |
813 | !test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) || | |
814 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
815 | !sta->tdls_chandef.chan) | |
816 | continue; | |
817 | ||
818 | compat = cfg80211_chandef_compatible(&sta->tdls_chandef, | |
819 | compat); | |
820 | if (WARN_ON_ONCE(!compat)) | |
821 | break; | |
822 | } | |
e89a96f5 MK |
823 | rcu_read_unlock(); |
824 | ||
a00f4f6e | 825 | if (!compat) |
4bf88530 | 826 | return; |
e89a96f5 | 827 | |
d6c37509 | 828 | ieee80211_change_chanctx(local, ctx, ctx, compat); |
e89a96f5 MK |
829 | } |
830 | ||
367bbd10 JB |
831 | static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local, |
832 | struct ieee80211_chanctx *chanctx) | |
833 | { | |
834 | bool radar_enabled; | |
835 | ||
836 | lockdep_assert_held(&local->chanctx_mtx); | |
5cbc95a7 | 837 | /* for ieee80211_is_radar_required */ |
34a3740d | 838 | lockdep_assert_held(&local->mtx); |
367bbd10 | 839 | |
e7f2337a | 840 | radar_enabled = ieee80211_chanctx_radar_required(local, chanctx); |
367bbd10 JB |
841 | |
842 | if (radar_enabled == chanctx->conf.radar_enabled) | |
843 | return; | |
844 | ||
845 | chanctx->conf.radar_enabled = radar_enabled; | |
367bbd10 JB |
846 | |
847 | if (!local->use_chanctx) { | |
848 | local->hw.conf.radar_enabled = chanctx->conf.radar_enabled; | |
849 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL); | |
850 | } | |
851 | ||
852 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR); | |
853 | } | |
854 | ||
b4f85443 JB |
855 | static int ieee80211_assign_link_chanctx(struct ieee80211_link_data *link, |
856 | struct ieee80211_chanctx *new_ctx) | |
d01a1e65 | 857 | { |
b4f85443 | 858 | struct ieee80211_sub_if_data *sdata = link->sdata; |
35f2fce9 | 859 | struct ieee80211_local *local = sdata->local; |
77eeba97 LC |
860 | struct ieee80211_chanctx_conf *conf; |
861 | struct ieee80211_chanctx *curr_ctx = NULL; | |
862 | int ret = 0; | |
d01a1e65 | 863 | |
708d50ed AB |
864 | if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN)) |
865 | return -ENOTSUPP; | |
866 | ||
d8675a63 | 867 | conf = rcu_dereference_protected(link->conf->chanctx_conf, |
77eeba97 | 868 | lockdep_is_held(&local->chanctx_mtx)); |
d01a1e65 | 869 | |
77eeba97 LC |
870 | if (conf) { |
871 | curr_ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
35f2fce9 | 872 | |
727eff4d | 873 | drv_unassign_vif_chanctx(local, sdata, link->conf, curr_ctx); |
77eeba97 | 874 | conf = NULL; |
b4f85443 | 875 | list_del(&link->assigned_chanctx_list); |
77eeba97 | 876 | } |
5bbe754d | 877 | |
77eeba97 | 878 | if (new_ctx) { |
04312de4 JB |
879 | /* recalc considering the link we'll use it for now */ |
880 | ieee80211_recalc_chanctx_min_def(local, new_ctx, link); | |
881 | ||
727eff4d | 882 | ret = drv_assign_vif_chanctx(local, sdata, link->conf, new_ctx); |
77eeba97 LC |
883 | if (ret) |
884 | goto out; | |
fd0f979a | 885 | |
77eeba97 | 886 | conf = &new_ctx->conf; |
b4f85443 JB |
887 | list_add(&link->assigned_chanctx_list, |
888 | &new_ctx->assigned_links); | |
77eeba97 | 889 | } |
e89a96f5 | 890 | |
77eeba97 | 891 | out: |
d8675a63 | 892 | rcu_assign_pointer(link->conf->chanctx_conf, conf); |
fd0f979a | 893 | |
f276e20b | 894 | sdata->vif.cfg.idle = !conf; |
77eeba97 | 895 | |
c0166da9 | 896 | if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) { |
77eeba97 LC |
897 | ieee80211_recalc_chanctx_chantype(local, curr_ctx); |
898 | ieee80211_recalc_smps_chanctx(local, curr_ctx); | |
899 | ieee80211_recalc_radar_chanctx(local, curr_ctx); | |
b72a455a | 900 | ieee80211_recalc_chanctx_min_def(local, curr_ctx, NULL); |
04ecd257 | 901 | } |
e89a96f5 | 902 | |
c0166da9 | 903 | if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) { |
db82d8a9 | 904 | ieee80211_recalc_txpower(sdata, false); |
b72a455a | 905 | ieee80211_recalc_chanctx_min_def(local, new_ctx, NULL); |
04ecd257 | 906 | } |
77eeba97 LC |
907 | |
908 | if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE && | |
909 | sdata->vif.type != NL80211_IFTYPE_MONITOR) | |
7b7090b4 | 910 | ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_IDLE); |
77eeba97 | 911 | |
17c18bf8 JB |
912 | ieee80211_check_fast_xmit_iface(sdata); |
913 | ||
77eeba97 | 914 | return ret; |
d01a1e65 MK |
915 | } |
916 | ||
04ecd257 JB |
917 | void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local, |
918 | struct ieee80211_chanctx *chanctx) | |
919 | { | |
920 | struct ieee80211_sub_if_data *sdata; | |
921 | u8 rx_chains_static, rx_chains_dynamic; | |
922 | ||
923 | lockdep_assert_held(&local->chanctx_mtx); | |
924 | ||
925 | rx_chains_static = 1; | |
926 | rx_chains_dynamic = 1; | |
927 | ||
928 | rcu_read_lock(); | |
929 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { | |
930 | u8 needed_static, needed_dynamic; | |
b4f85443 | 931 | unsigned int link_id; |
04ecd257 JB |
932 | |
933 | if (!ieee80211_sdata_running(sdata)) | |
934 | continue; | |
935 | ||
04ecd257 | 936 | switch (sdata->vif.type) { |
04ecd257 JB |
937 | case NL80211_IFTYPE_STATION: |
938 | if (!sdata->u.mgd.associated) | |
939 | continue; | |
940 | break; | |
04ecd257 JB |
941 | case NL80211_IFTYPE_AP: |
942 | case NL80211_IFTYPE_ADHOC: | |
04ecd257 | 943 | case NL80211_IFTYPE_MESH_POINT: |
239281f8 | 944 | case NL80211_IFTYPE_OCB: |
04ecd257 JB |
945 | break; |
946 | default: | |
b4f85443 | 947 | continue; |
04ecd257 JB |
948 | } |
949 | ||
b4f85443 | 950 | for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { |
d8675a63 | 951 | struct ieee80211_link_data *link; |
b4f85443 | 952 | |
d8675a63 JB |
953 | link = rcu_dereference(sdata->link[link_id]); |
954 | ||
955 | if (!link) | |
b4f85443 JB |
956 | continue; |
957 | ||
d8675a63 | 958 | if (rcu_access_pointer(link->conf->chanctx_conf) != &chanctx->conf) |
b4f85443 JB |
959 | continue; |
960 | ||
961 | switch (link->smps_mode) { | |
962 | default: | |
963 | WARN_ONCE(1, "Invalid SMPS mode %d\n", | |
964 | link->smps_mode); | |
965 | fallthrough; | |
966 | case IEEE80211_SMPS_OFF: | |
967 | needed_static = link->needed_rx_chains; | |
968 | needed_dynamic = link->needed_rx_chains; | |
969 | break; | |
970 | case IEEE80211_SMPS_DYNAMIC: | |
971 | needed_static = 1; | |
972 | needed_dynamic = link->needed_rx_chains; | |
973 | break; | |
974 | case IEEE80211_SMPS_STATIC: | |
975 | needed_static = 1; | |
976 | needed_dynamic = 1; | |
977 | break; | |
978 | } | |
04ecd257 | 979 | |
b4f85443 JB |
980 | rx_chains_static = max(rx_chains_static, needed_static); |
981 | rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic); | |
982 | } | |
04ecd257 | 983 | } |
7b8a9cdd IY |
984 | |
985 | /* Disable SMPS for the monitor interface */ | |
986 | sdata = rcu_dereference(local->monitor_sdata); | |
987 | if (sdata && | |
d8675a63 | 988 | rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf) == &chanctx->conf) |
7b8a9cdd IY |
989 | rx_chains_dynamic = rx_chains_static = local->rx_chains; |
990 | ||
04ecd257 JB |
991 | rcu_read_unlock(); |
992 | ||
993 | if (!local->use_chanctx) { | |
994 | if (rx_chains_static > 1) | |
995 | local->smps_mode = IEEE80211_SMPS_OFF; | |
996 | else if (rx_chains_dynamic > 1) | |
997 | local->smps_mode = IEEE80211_SMPS_DYNAMIC; | |
998 | else | |
999 | local->smps_mode = IEEE80211_SMPS_STATIC; | |
1000 | ieee80211_hw_config(local, 0); | |
1001 | } | |
1002 | ||
1003 | if (rx_chains_static == chanctx->conf.rx_chains_static && | |
1004 | rx_chains_dynamic == chanctx->conf.rx_chains_dynamic) | |
1005 | return; | |
1006 | ||
1007 | chanctx->conf.rx_chains_static = rx_chains_static; | |
1008 | chanctx->conf.rx_chains_dynamic = rx_chains_dynamic; | |
1009 | drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS); | |
1010 | } | |
1011 | ||
11335a55 | 1012 | static void |
b4f85443 JB |
1013 | __ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link, |
1014 | bool clear) | |
11335a55 | 1015 | { |
b4f85443 JB |
1016 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1017 | unsigned int link_id = link->link_id; | |
d8675a63 | 1018 | struct ieee80211_bss_conf *link_conf = link->conf; |
33926eb7 | 1019 | struct ieee80211_local *local __maybe_unused = sdata->local; |
11335a55 LC |
1020 | struct ieee80211_sub_if_data *vlan; |
1021 | struct ieee80211_chanctx_conf *conf; | |
1022 | ||
1023 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP)) | |
1024 | return; | |
1025 | ||
1026 | lockdep_assert_held(&local->mtx); | |
1027 | ||
1028 | /* Check that conf exists, even when clearing this function | |
1029 | * must be called with the AP's channel context still there | |
1030 | * as it would otherwise cause VLANs to have an invalid | |
1031 | * channel context pointer for a while, possibly pointing | |
1032 | * to a channel context that has already been freed. | |
1033 | */ | |
b4f85443 | 1034 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
33926eb7 | 1035 | lockdep_is_held(&local->chanctx_mtx)); |
11335a55 LC |
1036 | WARN_ON(!conf); |
1037 | ||
1038 | if (clear) | |
1039 | conf = NULL; | |
1040 | ||
d8675a63 JB |
1041 | rcu_read_lock(); |
1042 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { | |
1043 | struct ieee80211_bss_conf *vlan_conf; | |
1044 | ||
1045 | vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); | |
1046 | if (WARN_ON(!vlan_conf)) | |
1047 | continue; | |
1048 | ||
1049 | rcu_assign_pointer(vlan_conf->chanctx_conf, conf); | |
1050 | } | |
1051 | rcu_read_unlock(); | |
11335a55 LC |
1052 | } |
1053 | ||
b4f85443 JB |
1054 | void ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link, |
1055 | bool clear) | |
11335a55 | 1056 | { |
b4f85443 | 1057 | struct ieee80211_local *local = link->sdata->local; |
11335a55 LC |
1058 | |
1059 | mutex_lock(&local->chanctx_mtx); | |
1060 | ||
b4f85443 | 1061 | __ieee80211_link_copy_chanctx_to_vlans(link, clear); |
11335a55 LC |
1062 | |
1063 | mutex_unlock(&local->chanctx_mtx); | |
1064 | } | |
1065 | ||
b4f85443 | 1066 | int ieee80211_link_unreserve_chanctx(struct ieee80211_link_data *link) |
11335a55 | 1067 | { |
b4f85443 JB |
1068 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1069 | struct ieee80211_chanctx *ctx = link->reserved_chanctx; | |
e3afb920 | 1070 | |
11335a55 LC |
1071 | lockdep_assert_held(&sdata->local->chanctx_mtx); |
1072 | ||
e3afb920 | 1073 | if (WARN_ON(!ctx)) |
73da7d5b SW |
1074 | return -EINVAL; |
1075 | ||
b4f85443 JB |
1076 | list_del(&link->reserved_chanctx_list); |
1077 | link->reserved_chanctx = NULL; | |
11335a55 | 1078 | |
5bcae31d MK |
1079 | if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) { |
1080 | if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1081 | if (WARN_ON(!ctx->replace_ctx)) | |
1082 | return -EINVAL; | |
1083 | ||
1084 | WARN_ON(ctx->replace_ctx->replace_state != | |
1085 | IEEE80211_CHANCTX_WILL_BE_REPLACED); | |
1086 | WARN_ON(ctx->replace_ctx->replace_ctx != ctx); | |
1087 | ||
1088 | ctx->replace_ctx->replace_ctx = NULL; | |
1089 | ctx->replace_ctx->replace_state = | |
1090 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1091 | ||
1092 | list_del_rcu(&ctx->list); | |
1093 | kfree_rcu(ctx, rcu_head); | |
1094 | } else { | |
1095 | ieee80211_free_chanctx(sdata->local, ctx); | |
1096 | } | |
1097 | } | |
e3afb920 | 1098 | |
11335a55 LC |
1099 | return 0; |
1100 | } | |
1101 | ||
b4f85443 JB |
1102 | int ieee80211_link_reserve_chanctx(struct ieee80211_link_data *link, |
1103 | const struct cfg80211_chan_def *chandef, | |
1104 | enum ieee80211_chanctx_mode mode, | |
1105 | bool radar_required) | |
11335a55 | 1106 | { |
b4f85443 | 1107 | struct ieee80211_sub_if_data *sdata = link->sdata; |
11335a55 | 1108 | struct ieee80211_local *local = sdata->local; |
5bcae31d | 1109 | struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx; |
11335a55 | 1110 | |
5bcae31d | 1111 | lockdep_assert_held(&local->chanctx_mtx); |
73da7d5b | 1112 | |
b4f85443 | 1113 | curr_ctx = ieee80211_link_get_chanctx(link); |
5bcae31d MK |
1114 | if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx) |
1115 | return -ENOTSUPP; | |
11335a55 | 1116 | |
13f348a8 | 1117 | new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode); |
11335a55 | 1118 | if (!new_ctx) { |
5bcae31d | 1119 | if (ieee80211_can_create_new_chanctx(local)) { |
5d52ee81 | 1120 | new_ctx = ieee80211_new_chanctx(local, chandef, mode); |
5bcae31d MK |
1121 | if (IS_ERR(new_ctx)) |
1122 | return PTR_ERR(new_ctx); | |
c2b90ad8 | 1123 | } else { |
5bcae31d MK |
1124 | if (!curr_ctx || |
1125 | (curr_ctx->replace_state == | |
1126 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
b4f85443 | 1127 | !list_empty(&curr_ctx->reserved_links)) { |
5bcae31d | 1128 | /* |
b4f85443 | 1129 | * Another link already requested this context |
5bcae31d | 1130 | * for a reservation. Find another one hoping |
b4f85443 | 1131 | * all links assigned to it will also switch |
5bcae31d MK |
1132 | * soon enough. |
1133 | * | |
1134 | * TODO: This needs a little more work as some | |
1135 | * cases (more than 2 chanctx capable devices) | |
1136 | * may fail which could otherwise succeed | |
1137 | * provided some channel context juggling was | |
1138 | * performed. | |
1139 | * | |
b4f85443 JB |
1140 | * Consider ctx1..3, link1..6, each ctx has 2 |
1141 | * links. link1 and link2 from ctx1 request new | |
5bcae31d MK |
1142 | * different chandefs starting 2 in-place |
1143 | * reserations with ctx4 and ctx5 replacing | |
b4f85443 JB |
1144 | * ctx1 and ctx2 respectively. Next link5 and |
1145 | * link6 from ctx3 reserve ctx4. If link3 and | |
1146 | * link4 remain on ctx2 as they are then this | |
5bcae31d MK |
1147 | * fails unless `replace_ctx` from ctx5 is |
1148 | * replaced with ctx3. | |
1149 | */ | |
1150 | list_for_each_entry(ctx, &local->chanctx_list, | |
1151 | list) { | |
1152 | if (ctx->replace_state != | |
1153 | IEEE80211_CHANCTX_REPLACE_NONE) | |
1154 | continue; | |
1155 | ||
b4f85443 | 1156 | if (!list_empty(&ctx->reserved_links)) |
5bcae31d MK |
1157 | continue; |
1158 | ||
1159 | curr_ctx = ctx; | |
1160 | break; | |
1161 | } | |
1162 | } | |
1163 | ||
1164 | /* | |
1165 | * If that's true then all available contexts already | |
1166 | * have reservations and cannot be used. | |
1167 | */ | |
1168 | if (!curr_ctx || | |
1169 | (curr_ctx->replace_state == | |
1170 | IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
b4f85443 | 1171 | !list_empty(&curr_ctx->reserved_links)) |
5bcae31d MK |
1172 | return -EBUSY; |
1173 | ||
1174 | new_ctx = ieee80211_alloc_chanctx(local, chandef, mode); | |
1175 | if (!new_ctx) | |
1176 | return -ENOMEM; | |
1177 | ||
1178 | new_ctx->replace_ctx = curr_ctx; | |
1179 | new_ctx->replace_state = | |
1180 | IEEE80211_CHANCTX_REPLACES_OTHER; | |
1181 | ||
1182 | curr_ctx->replace_ctx = new_ctx; | |
1183 | curr_ctx->replace_state = | |
1184 | IEEE80211_CHANCTX_WILL_BE_REPLACED; | |
1185 | ||
1186 | list_add_rcu(&new_ctx->list, &local->chanctx_list); | |
11335a55 LC |
1187 | } |
1188 | } | |
1189 | ||
b4f85443 JB |
1190 | list_add(&link->reserved_chanctx_list, &new_ctx->reserved_links); |
1191 | link->reserved_chanctx = new_ctx; | |
1192 | link->reserved_chandef = *chandef; | |
1193 | link->reserved_radar_required = radar_required; | |
1194 | link->reserved_ready = false; | |
5bcae31d MK |
1195 | |
1196 | return 0; | |
11335a55 LC |
1197 | } |
1198 | ||
03078de4 | 1199 | static void |
b4f85443 | 1200 | ieee80211_link_chanctx_reservation_complete(struct ieee80211_link_data *link) |
03078de4 | 1201 | { |
b4f85443 JB |
1202 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1203 | ||
03078de4 MK |
1204 | switch (sdata->vif.type) { |
1205 | case NL80211_IFTYPE_ADHOC: | |
1206 | case NL80211_IFTYPE_AP: | |
1207 | case NL80211_IFTYPE_MESH_POINT: | |
6e0bd6c3 | 1208 | case NL80211_IFTYPE_OCB: |
03078de4 | 1209 | ieee80211_queue_work(&sdata->local->hw, |
b4f85443 | 1210 | &link->csa_finalize_work); |
03078de4 | 1211 | break; |
03078de4 | 1212 | case NL80211_IFTYPE_STATION: |
ec3252bf JB |
1213 | wiphy_delayed_work_queue(sdata->local->hw.wiphy, |
1214 | &link->u.mgd.chswitch_work, 0); | |
4c3ebc56 MK |
1215 | break; |
1216 | case NL80211_IFTYPE_UNSPECIFIED: | |
03078de4 MK |
1217 | case NL80211_IFTYPE_AP_VLAN: |
1218 | case NL80211_IFTYPE_WDS: | |
1219 | case NL80211_IFTYPE_MONITOR: | |
1220 | case NL80211_IFTYPE_P2P_CLIENT: | |
1221 | case NL80211_IFTYPE_P2P_GO: | |
1222 | case NL80211_IFTYPE_P2P_DEVICE: | |
cb3b7d87 | 1223 | case NL80211_IFTYPE_NAN: |
03078de4 MK |
1224 | case NUM_NL80211_IFTYPES: |
1225 | WARN_ON(1); | |
1226 | break; | |
1227 | } | |
1228 | } | |
1229 | ||
2967e031 | 1230 | static void |
b4f85443 JB |
1231 | ieee80211_link_update_chandef(struct ieee80211_link_data *link, |
1232 | const struct cfg80211_chan_def *chandef) | |
2967e031 | 1233 | { |
b4f85443 JB |
1234 | struct ieee80211_sub_if_data *sdata = link->sdata; |
1235 | unsigned int link_id = link->link_id; | |
2967e031 FF |
1236 | struct ieee80211_sub_if_data *vlan; |
1237 | ||
d8675a63 | 1238 | link->conf->chandef = *chandef; |
2967e031 FF |
1239 | |
1240 | if (sdata->vif.type != NL80211_IFTYPE_AP) | |
1241 | return; | |
1242 | ||
d8675a63 JB |
1243 | rcu_read_lock(); |
1244 | list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { | |
1245 | struct ieee80211_bss_conf *vlan_conf; | |
1246 | ||
1247 | vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); | |
1248 | if (WARN_ON(!vlan_conf)) | |
1249 | continue; | |
1250 | ||
1251 | vlan_conf->chandef = *chandef; | |
1252 | } | |
1253 | rcu_read_unlock(); | |
2967e031 FF |
1254 | } |
1255 | ||
5bcae31d | 1256 | static int |
b4f85443 | 1257 | ieee80211_link_use_reserved_reassign(struct ieee80211_link_data *link) |
11335a55 | 1258 | { |
b4f85443 | 1259 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1260 | struct ieee80211_bss_conf *link_conf = link->conf; |
11335a55 | 1261 | struct ieee80211_local *local = sdata->local; |
5bcae31d MK |
1262 | struct ieee80211_vif_chanctx_switch vif_chsw[1] = {}; |
1263 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1264 | const struct cfg80211_chan_def *chandef; | |
15ddba5f | 1265 | u64 changed = 0; |
5bcae31d | 1266 | int err; |
11335a55 LC |
1267 | |
1268 | lockdep_assert_held(&local->mtx); | |
5bcae31d | 1269 | lockdep_assert_held(&local->chanctx_mtx); |
11335a55 | 1270 | |
b4f85443 JB |
1271 | new_ctx = link->reserved_chanctx; |
1272 | old_ctx = ieee80211_link_get_chanctx(link); | |
11335a55 | 1273 | |
b4f85443 | 1274 | if (WARN_ON(!link->reserved_ready)) |
5bcae31d | 1275 | return -EBUSY; |
73da7d5b | 1276 | |
5bcae31d MK |
1277 | if (WARN_ON(!new_ctx)) |
1278 | return -EINVAL; | |
1279 | ||
1280 | if (WARN_ON(!old_ctx)) | |
1281 | return -EINVAL; | |
1282 | ||
1283 | if (WARN_ON(new_ctx->replace_state == | |
1284 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1285 | return -EINVAL; | |
1286 | ||
1287 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
b4f85443 | 1288 | &link->reserved_chandef); |
5bcae31d MK |
1289 | if (WARN_ON(!chandef)) |
1290 | return -EINVAL; | |
1291 | ||
b4f85443 | 1292 | if (link_conf->chandef.width != link->reserved_chandef.width) |
d6c37509 | 1293 | changed = BSS_CHANGED_BANDWIDTH; |
44b72ca8 | 1294 | |
b4f85443 | 1295 | ieee80211_link_update_chandef(link, &link->reserved_chandef); |
bf45a242 | 1296 | |
b72a455a | 1297 | _ieee80211_change_chanctx(local, new_ctx, old_ctx, chandef, link); |
44b72ca8 | 1298 | |
5bcae31d MK |
1299 | vif_chsw[0].vif = &sdata->vif; |
1300 | vif_chsw[0].old_ctx = &old_ctx->conf; | |
1301 | vif_chsw[0].new_ctx = &new_ctx->conf; | |
727eff4d | 1302 | vif_chsw[0].link_conf = link->conf; |
5bcae31d | 1303 | |
b4f85443 JB |
1304 | list_del(&link->reserved_chanctx_list); |
1305 | link->reserved_chanctx = NULL; | |
5bcae31d MK |
1306 | |
1307 | err = drv_switch_vif_chanctx(local, vif_chsw, 1, | |
1308 | CHANCTX_SWMODE_REASSIGN_VIF); | |
1309 | if (err) { | |
1310 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1311 | ieee80211_free_chanctx(local, new_ctx); | |
1312 | ||
03078de4 | 1313 | goto out; |
73da7d5b SW |
1314 | } |
1315 | ||
b4f85443 JB |
1316 | list_move(&link->assigned_chanctx_list, &new_ctx->assigned_links); |
1317 | rcu_assign_pointer(link_conf->chanctx_conf, &new_ctx->conf); | |
5bcae31d MK |
1318 | |
1319 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
b4f85443 | 1320 | __ieee80211_link_copy_chanctx_to_vlans(link, false); |
5bcae31d | 1321 | |
17c18bf8 JB |
1322 | ieee80211_check_fast_xmit_iface(sdata); |
1323 | ||
5bcae31d MK |
1324 | if (ieee80211_chanctx_refcount(local, old_ctx) == 0) |
1325 | ieee80211_free_chanctx(local, old_ctx); | |
73da7d5b | 1326 | |
b72a455a | 1327 | ieee80211_recalc_chanctx_min_def(local, new_ctx, NULL); |
722ddb0d EG |
1328 | ieee80211_recalc_smps_chanctx(local, new_ctx); |
1329 | ieee80211_recalc_radar_chanctx(local, new_ctx); | |
722ddb0d | 1330 | |
5bcae31d | 1331 | if (changed) |
d8675a63 | 1332 | ieee80211_link_info_change_notify(sdata, link, changed); |
5bcae31d | 1333 | |
03078de4 | 1334 | out: |
b4f85443 | 1335 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1336 | return err; |
1337 | } | |
1338 | ||
1339 | static int | |
b4f85443 | 1340 | ieee80211_link_use_reserved_assign(struct ieee80211_link_data *link) |
5bcae31d | 1341 | { |
b4f85443 | 1342 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1343 | struct ieee80211_local *local = sdata->local; |
1344 | struct ieee80211_chanctx *old_ctx, *new_ctx; | |
1345 | const struct cfg80211_chan_def *chandef; | |
1346 | int err; | |
1347 | ||
d8675a63 | 1348 | old_ctx = ieee80211_link_get_chanctx(link); |
b4f85443 | 1349 | new_ctx = link->reserved_chanctx; |
5bcae31d | 1350 | |
b4f85443 | 1351 | if (WARN_ON(!link->reserved_ready)) |
5bcae31d MK |
1352 | return -EINVAL; |
1353 | ||
1354 | if (WARN_ON(old_ctx)) | |
1355 | return -EINVAL; | |
1356 | ||
1357 | if (WARN_ON(!new_ctx)) | |
1358 | return -EINVAL; | |
1359 | ||
1360 | if (WARN_ON(new_ctx->replace_state == | |
1361 | IEEE80211_CHANCTX_REPLACES_OTHER)) | |
1362 | return -EINVAL; | |
1363 | ||
1364 | chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx, | |
b4f85443 | 1365 | &link->reserved_chandef); |
5bcae31d MK |
1366 | if (WARN_ON(!chandef)) |
1367 | return -EINVAL; | |
1368 | ||
d6c37509 | 1369 | ieee80211_change_chanctx(local, new_ctx, new_ctx, chandef); |
bf45a242 | 1370 | |
b4f85443 JB |
1371 | list_del(&link->reserved_chanctx_list); |
1372 | link->reserved_chanctx = NULL; | |
11335a55 | 1373 | |
b4f85443 | 1374 | err = ieee80211_assign_link_chanctx(link, new_ctx); |
5bcae31d MK |
1375 | if (err) { |
1376 | if (ieee80211_chanctx_refcount(local, new_ctx) == 0) | |
1377 | ieee80211_free_chanctx(local, new_ctx); | |
1378 | ||
1379 | goto out; | |
1380 | } | |
1381 | ||
1382 | out: | |
b4f85443 | 1383 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1384 | return err; |
1385 | } | |
1386 | ||
1387 | static bool | |
b4f85443 | 1388 | ieee80211_link_has_in_place_reservation(struct ieee80211_link_data *link) |
5bcae31d | 1389 | { |
b4f85443 | 1390 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1391 | struct ieee80211_chanctx *old_ctx, *new_ctx; |
1392 | ||
1393 | lockdep_assert_held(&sdata->local->chanctx_mtx); | |
1394 | ||
b4f85443 JB |
1395 | new_ctx = link->reserved_chanctx; |
1396 | old_ctx = ieee80211_link_get_chanctx(link); | |
5bcae31d MK |
1397 | |
1398 | if (!old_ctx) | |
1399 | return false; | |
1400 | ||
1401 | if (WARN_ON(!new_ctx)) | |
1402 | return false; | |
1403 | ||
1404 | if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1405 | return false; | |
1406 | ||
1407 | if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1408 | return false; | |
1409 | ||
1410 | return true; | |
1411 | } | |
1412 | ||
1413 | static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local, | |
1414 | struct ieee80211_chanctx *new_ctx) | |
1415 | { | |
1416 | const struct cfg80211_chan_def *chandef; | |
1417 | ||
1418 | lockdep_assert_held(&local->mtx); | |
1419 | lockdep_assert_held(&local->chanctx_mtx); | |
1420 | ||
1421 | chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL); | |
1422 | if (WARN_ON(!chandef)) | |
1423 | return -EINVAL; | |
1424 | ||
1425 | local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled; | |
1426 | local->_oper_chandef = *chandef; | |
1427 | ieee80211_hw_config(local, 0); | |
1428 | ||
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local, | |
1433 | int n_vifs) | |
1434 | { | |
1435 | struct ieee80211_vif_chanctx_switch *vif_chsw; | |
b4f85443 | 1436 | struct ieee80211_link_data *link; |
5bcae31d MK |
1437 | struct ieee80211_chanctx *ctx, *old_ctx; |
1438 | int i, err; | |
1439 | ||
1440 | lockdep_assert_held(&local->mtx); | |
1441 | lockdep_assert_held(&local->chanctx_mtx); | |
1442 | ||
6396bb22 | 1443 | vif_chsw = kcalloc(n_vifs, sizeof(vif_chsw[0]), GFP_KERNEL); |
5bcae31d MK |
1444 | if (!vif_chsw) |
1445 | return -ENOMEM; | |
1446 | ||
1447 | i = 0; | |
1448 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1449 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1450 | continue; | |
1451 | ||
1452 | if (WARN_ON(!ctx->replace_ctx)) { | |
1453 | err = -EINVAL; | |
5d52ee81 LC |
1454 | goto out; |
1455 | } | |
11335a55 | 1456 | |
b4f85443 | 1457 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1458 | reserved_chanctx_list) { |
b4f85443 | 1459 | if (!ieee80211_link_has_in_place_reservation(link)) |
5bcae31d MK |
1460 | continue; |
1461 | ||
b4f85443 JB |
1462 | old_ctx = ieee80211_link_get_chanctx(link); |
1463 | vif_chsw[i].vif = &link->sdata->vif; | |
5bcae31d MK |
1464 | vif_chsw[i].old_ctx = &old_ctx->conf; |
1465 | vif_chsw[i].new_ctx = &ctx->conf; | |
727eff4d | 1466 | vif_chsw[i].link_conf = link->conf; |
5bcae31d MK |
1467 | |
1468 | i++; | |
1469 | } | |
5d52ee81 | 1470 | } |
11335a55 | 1471 | |
5bcae31d MK |
1472 | err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs, |
1473 | CHANCTX_SWMODE_SWAP_CONTEXTS); | |
73da7d5b | 1474 | |
11335a55 | 1475 | out: |
5bcae31d MK |
1476 | kfree(vif_chsw); |
1477 | return err; | |
1478 | } | |
1479 | ||
1480 | static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local) | |
1481 | { | |
1482 | struct ieee80211_chanctx *ctx; | |
1483 | int err; | |
1484 | ||
1485 | lockdep_assert_held(&local->mtx); | |
1486 | lockdep_assert_held(&local->chanctx_mtx); | |
1487 | ||
1488 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
1489 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1490 | continue; | |
1491 | ||
b4f85443 | 1492 | if (!list_empty(&ctx->replace_ctx->assigned_links)) |
5bcae31d MK |
1493 | continue; |
1494 | ||
1495 | ieee80211_del_chanctx(local, ctx->replace_ctx); | |
1496 | err = ieee80211_add_chanctx(local, ctx); | |
1497 | if (err) | |
1498 | goto err; | |
1499 | } | |
1500 | ||
1501 | return 0; | |
1502 | ||
1503 | err: | |
1504 | WARN_ON(ieee80211_add_chanctx(local, ctx)); | |
1505 | list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) { | |
1506 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) | |
1507 | continue; | |
1508 | ||
b4f85443 | 1509 | if (!list_empty(&ctx->replace_ctx->assigned_links)) |
5bcae31d MK |
1510 | continue; |
1511 | ||
1512 | ieee80211_del_chanctx(local, ctx); | |
1513 | WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx)); | |
1514 | } | |
1515 | ||
1516 | return err; | |
1517 | } | |
1518 | ||
649b2a4d | 1519 | static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local) |
5bcae31d | 1520 | { |
5bcae31d MK |
1521 | struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx; |
1522 | struct ieee80211_chanctx *new_ctx = NULL; | |
b7f2405c | 1523 | int err, n_assigned, n_reserved, n_ready; |
5bcae31d MK |
1524 | int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0; |
1525 | ||
1526 | lockdep_assert_held(&local->mtx); | |
1527 | lockdep_assert_held(&local->chanctx_mtx); | |
1528 | ||
1529 | /* | |
1530 | * If there are 2 independent pairs of channel contexts performing | |
1531 | * cross-switch of their vifs this code will still wait until both are | |
1532 | * ready even though it could be possible to switch one before the | |
1533 | * other is ready. | |
1534 | * | |
1535 | * For practical reasons and code simplicity just do a single huge | |
1536 | * switch. | |
1537 | */ | |
1538 | ||
1539 | /* | |
1540 | * Verify if the reservation is still feasible. | |
1541 | * - if it's not then disconnect | |
1542 | * - if it is but not all vifs necessary are ready then defer | |
1543 | */ | |
1544 | ||
1545 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
b4f85443 JB |
1546 | struct ieee80211_link_data *link; |
1547 | ||
5bcae31d MK |
1548 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1549 | continue; | |
1550 | ||
1551 | if (WARN_ON(!ctx->replace_ctx)) { | |
1552 | err = -EINVAL; | |
1553 | goto err; | |
1554 | } | |
1555 | ||
1556 | if (!local->use_chanctx) | |
1557 | new_ctx = ctx; | |
1558 | ||
1559 | n_ctx++; | |
1560 | ||
1561 | n_assigned = 0; | |
1562 | n_reserved = 0; | |
1563 | n_ready = 0; | |
1564 | ||
b4f85443 | 1565 | list_for_each_entry(link, &ctx->replace_ctx->assigned_links, |
5bcae31d MK |
1566 | assigned_chanctx_list) { |
1567 | n_assigned++; | |
b4f85443 | 1568 | if (link->reserved_chanctx) { |
5bcae31d | 1569 | n_reserved++; |
b4f85443 | 1570 | if (link->reserved_ready) |
5bcae31d MK |
1571 | n_ready++; |
1572 | } | |
1573 | } | |
1574 | ||
1575 | if (n_assigned != n_reserved) { | |
1576 | if (n_ready == n_reserved) { | |
1577 | wiphy_info(local->hw.wiphy, | |
1578 | "channel context reservation cannot be finalized because some interfaces aren't switching\n"); | |
1579 | err = -EBUSY; | |
1580 | goto err; | |
1581 | } | |
1582 | ||
1583 | return -EAGAIN; | |
1584 | } | |
1585 | ||
1586 | ctx->conf.radar_enabled = false; | |
b4f85443 | 1587 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1588 | reserved_chanctx_list) { |
b4f85443 JB |
1589 | if (ieee80211_link_has_in_place_reservation(link) && |
1590 | !link->reserved_ready) | |
5bcae31d MK |
1591 | return -EAGAIN; |
1592 | ||
b4f85443 | 1593 | old_ctx = ieee80211_link_get_chanctx(link); |
5bcae31d MK |
1594 | if (old_ctx) { |
1595 | if (old_ctx->replace_state == | |
1596 | IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1597 | n_vifs_switch++; | |
1598 | else | |
1599 | n_vifs_assign++; | |
1600 | } else { | |
1601 | n_vifs_ctxless++; | |
1602 | } | |
1603 | ||
b4f85443 | 1604 | if (link->reserved_radar_required) |
5bcae31d MK |
1605 | ctx->conf.radar_enabled = true; |
1606 | } | |
1607 | } | |
1608 | ||
1609 | if (WARN_ON(n_ctx == 0) || | |
1610 | WARN_ON(n_vifs_switch == 0 && | |
1611 | n_vifs_assign == 0 && | |
1612 | n_vifs_ctxless == 0) || | |
1613 | WARN_ON(n_ctx > 1 && !local->use_chanctx) || | |
1614 | WARN_ON(!new_ctx && !local->use_chanctx)) { | |
1615 | err = -EINVAL; | |
1616 | goto err; | |
1617 | } | |
1618 | ||
1619 | /* | |
1620 | * All necessary vifs are ready. Perform the switch now depending on | |
1621 | * reservations and driver capabilities. | |
1622 | */ | |
1623 | ||
1624 | if (local->use_chanctx) { | |
1625 | if (n_vifs_switch > 0) { | |
1626 | err = ieee80211_chsw_switch_vifs(local, n_vifs_switch); | |
1627 | if (err) | |
1628 | goto err; | |
1629 | } | |
1630 | ||
1631 | if (n_vifs_assign > 0 || n_vifs_ctxless > 0) { | |
1632 | err = ieee80211_chsw_switch_ctxs(local); | |
1633 | if (err) | |
1634 | goto err; | |
1635 | } | |
1636 | } else { | |
1637 | err = ieee80211_chsw_switch_hwconf(local, new_ctx); | |
1638 | if (err) | |
1639 | goto err; | |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | * Update all structures, values and pointers to point to new channel | |
1644 | * context(s). | |
1645 | */ | |
5bcae31d | 1646 | list_for_each_entry(ctx, &local->chanctx_list, list) { |
b4f85443 JB |
1647 | struct ieee80211_link_data *link, *link_tmp; |
1648 | ||
5bcae31d MK |
1649 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1650 | continue; | |
1651 | ||
1652 | if (WARN_ON(!ctx->replace_ctx)) { | |
1653 | err = -EINVAL; | |
1654 | goto err; | |
1655 | } | |
1656 | ||
b4f85443 | 1657 | list_for_each_entry(link, &ctx->reserved_links, |
5bcae31d | 1658 | reserved_chanctx_list) { |
b4f85443 | 1659 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1660 | struct ieee80211_bss_conf *link_conf = link->conf; |
15ddba5f | 1661 | u64 changed = 0; |
5bcae31d | 1662 | |
b4f85443 | 1663 | if (!ieee80211_link_has_in_place_reservation(link)) |
5bcae31d MK |
1664 | continue; |
1665 | ||
b4f85443 | 1666 | rcu_assign_pointer(link_conf->chanctx_conf, |
d0a9123e | 1667 | &ctx->conf); |
5bcae31d MK |
1668 | |
1669 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
b4f85443 JB |
1670 | __ieee80211_link_copy_chanctx_to_vlans(link, |
1671 | false); | |
5bcae31d | 1672 | |
17c18bf8 JB |
1673 | ieee80211_check_fast_xmit_iface(sdata); |
1674 | ||
b4f85443 | 1675 | link->radar_required = link->reserved_radar_required; |
5bcae31d | 1676 | |
b4f85443 | 1677 | if (link_conf->chandef.width != link->reserved_chandef.width) |
5bcae31d MK |
1678 | changed = BSS_CHANGED_BANDWIDTH; |
1679 | ||
b4f85443 | 1680 | ieee80211_link_update_chandef(link, &link->reserved_chandef); |
5bcae31d | 1681 | if (changed) |
b4f85443 | 1682 | ieee80211_link_info_change_notify(sdata, |
d8675a63 | 1683 | link, |
7b7090b4 | 1684 | changed); |
5bcae31d | 1685 | |
db82d8a9 | 1686 | ieee80211_recalc_txpower(sdata, false); |
5bcae31d MK |
1687 | } |
1688 | ||
1689 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1690 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1691 | ieee80211_recalc_radar_chanctx(local, ctx); | |
b72a455a | 1692 | ieee80211_recalc_chanctx_min_def(local, ctx, NULL); |
5bcae31d | 1693 | |
b4f85443 | 1694 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
5bcae31d | 1695 | reserved_chanctx_list) { |
b4f85443 | 1696 | if (ieee80211_link_get_chanctx(link) != ctx) |
5bcae31d MK |
1697 | continue; |
1698 | ||
b4f85443 JB |
1699 | list_del(&link->reserved_chanctx_list); |
1700 | list_move(&link->assigned_chanctx_list, | |
1701 | &ctx->assigned_links); | |
1702 | link->reserved_chanctx = NULL; | |
03078de4 | 1703 | |
b4f85443 | 1704 | ieee80211_link_chanctx_reservation_complete(link); |
5bcae31d MK |
1705 | } |
1706 | ||
1707 | /* | |
1708 | * This context might have been a dependency for an already | |
1709 | * ready re-assign reservation interface that was deferred. Do | |
1710 | * not propagate error to the caller though. The in-place | |
1711 | * reservation for originally requested interface has already | |
1712 | * succeeded at this point. | |
1713 | */ | |
b4f85443 | 1714 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
5bcae31d | 1715 | reserved_chanctx_list) { |
b4f85443 | 1716 | if (WARN_ON(ieee80211_link_has_in_place_reservation(link))) |
5bcae31d MK |
1717 | continue; |
1718 | ||
b4f85443 | 1719 | if (WARN_ON(link->reserved_chanctx != ctx)) |
5bcae31d MK |
1720 | continue; |
1721 | ||
b4f85443 | 1722 | if (!link->reserved_ready) |
5bcae31d MK |
1723 | continue; |
1724 | ||
b4f85443 JB |
1725 | if (ieee80211_link_get_chanctx(link)) |
1726 | err = ieee80211_link_use_reserved_reassign(link); | |
5bcae31d | 1727 | else |
b4f85443 | 1728 | err = ieee80211_link_use_reserved_assign(link); |
5bcae31d MK |
1729 | |
1730 | if (err) { | |
b4f85443 JB |
1731 | link_info(link, |
1732 | "failed to finalize (re-)assign reservation (err=%d)\n", | |
1733 | err); | |
1734 | ieee80211_link_unreserve_chanctx(link); | |
5bcae31d | 1735 | cfg80211_stop_iface(local->hw.wiphy, |
b4f85443 | 1736 | &link->sdata->wdev, |
5bcae31d MK |
1737 | GFP_KERNEL); |
1738 | } | |
1739 | } | |
1740 | } | |
1741 | ||
1742 | /* | |
1743 | * Finally free old contexts | |
1744 | */ | |
1745 | ||
1746 | list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) { | |
1747 | if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED) | |
1748 | continue; | |
1749 | ||
1750 | ctx->replace_ctx->replace_ctx = NULL; | |
1751 | ctx->replace_ctx->replace_state = | |
1752 | IEEE80211_CHANCTX_REPLACE_NONE; | |
1753 | ||
1754 | list_del_rcu(&ctx->list); | |
1755 | kfree_rcu(ctx, rcu_head); | |
1756 | } | |
1757 | ||
1758 | return 0; | |
1759 | ||
1760 | err: | |
1761 | list_for_each_entry(ctx, &local->chanctx_list, list) { | |
b4f85443 JB |
1762 | struct ieee80211_link_data *link, *link_tmp; |
1763 | ||
5bcae31d MK |
1764 | if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER) |
1765 | continue; | |
1766 | ||
b4f85443 | 1767 | list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links, |
03078de4 | 1768 | reserved_chanctx_list) { |
b4f85443 JB |
1769 | ieee80211_link_unreserve_chanctx(link); |
1770 | ieee80211_link_chanctx_reservation_complete(link); | |
03078de4 | 1771 | } |
5bcae31d MK |
1772 | } |
1773 | ||
1774 | return err; | |
1775 | } | |
1776 | ||
b4f85443 | 1777 | static void __ieee80211_link_release_channel(struct ieee80211_link_data *link) |
649b2a4d | 1778 | { |
b4f85443 | 1779 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1780 | struct ieee80211_bss_conf *link_conf = link->conf; |
649b2a4d JB |
1781 | struct ieee80211_local *local = sdata->local; |
1782 | struct ieee80211_chanctx_conf *conf; | |
1783 | struct ieee80211_chanctx *ctx; | |
1784 | bool use_reserved_switch = false; | |
1785 | ||
1786 | lockdep_assert_held(&local->chanctx_mtx); | |
1787 | ||
b4f85443 | 1788 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
649b2a4d JB |
1789 | lockdep_is_held(&local->chanctx_mtx)); |
1790 | if (!conf) | |
1791 | return; | |
1792 | ||
1793 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1794 | ||
b4f85443 JB |
1795 | if (link->reserved_chanctx) { |
1796 | if (link->reserved_chanctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER && | |
1797 | ieee80211_chanctx_num_reserved(local, link->reserved_chanctx) > 1) | |
649b2a4d JB |
1798 | use_reserved_switch = true; |
1799 | ||
b4f85443 | 1800 | ieee80211_link_unreserve_chanctx(link); |
649b2a4d JB |
1801 | } |
1802 | ||
b4f85443 | 1803 | ieee80211_assign_link_chanctx(link, NULL); |
649b2a4d JB |
1804 | if (ieee80211_chanctx_refcount(local, ctx) == 0) |
1805 | ieee80211_free_chanctx(local, ctx); | |
1806 | ||
b4f85443 | 1807 | link->radar_required = false; |
104f5a62 | 1808 | |
649b2a4d JB |
1809 | /* Unreserving may ready an in-place reservation. */ |
1810 | if (use_reserved_switch) | |
1811 | ieee80211_vif_use_reserved_switch(local); | |
1812 | } | |
1813 | ||
b4f85443 JB |
1814 | int ieee80211_link_use_channel(struct ieee80211_link_data *link, |
1815 | const struct cfg80211_chan_def *chandef, | |
1816 | enum ieee80211_chanctx_mode mode) | |
649b2a4d | 1817 | { |
b4f85443 | 1818 | struct ieee80211_sub_if_data *sdata = link->sdata; |
649b2a4d JB |
1819 | struct ieee80211_local *local = sdata->local; |
1820 | struct ieee80211_chanctx *ctx; | |
1821 | u8 radar_detect_width = 0; | |
1822 | int ret; | |
1823 | ||
1824 | lockdep_assert_held(&local->mtx); | |
1825 | ||
efe9c2bf JB |
1826 | if (sdata->vif.active_links && |
1827 | !(sdata->vif.active_links & BIT(link->link_id))) { | |
1828 | ieee80211_link_update_chandef(link, chandef); | |
1829 | return 0; | |
1830 | } | |
1831 | ||
649b2a4d JB |
1832 | mutex_lock(&local->chanctx_mtx); |
1833 | ||
1834 | ret = cfg80211_chandef_dfs_required(local->hw.wiphy, | |
1835 | chandef, | |
1836 | sdata->wdev.iftype); | |
1837 | if (ret < 0) | |
1838 | goto out; | |
1839 | if (ret > 0) | |
1840 | radar_detect_width = BIT(chandef->width); | |
1841 | ||
d8675a63 | 1842 | link->radar_required = ret; |
649b2a4d JB |
1843 | |
1844 | ret = ieee80211_check_combinations(sdata, chandef, mode, | |
1845 | radar_detect_width); | |
1846 | if (ret < 0) | |
1847 | goto out; | |
1848 | ||
b4f85443 | 1849 | __ieee80211_link_release_channel(link); |
649b2a4d JB |
1850 | |
1851 | ctx = ieee80211_find_chanctx(local, chandef, mode); | |
1852 | if (!ctx) | |
1853 | ctx = ieee80211_new_chanctx(local, chandef, mode); | |
1854 | if (IS_ERR(ctx)) { | |
1855 | ret = PTR_ERR(ctx); | |
1856 | goto out; | |
1857 | } | |
1858 | ||
b4f85443 | 1859 | ieee80211_link_update_chandef(link, chandef); |
649b2a4d | 1860 | |
b4f85443 | 1861 | ret = ieee80211_assign_link_chanctx(link, ctx); |
649b2a4d JB |
1862 | if (ret) { |
1863 | /* if assign fails refcount stays the same */ | |
1864 | if (ieee80211_chanctx_refcount(local, ctx) == 0) | |
1865 | ieee80211_free_chanctx(local, ctx); | |
1866 | goto out; | |
1867 | } | |
1868 | ||
1869 | ieee80211_recalc_smps_chanctx(local, ctx); | |
1870 | ieee80211_recalc_radar_chanctx(local, ctx); | |
1871 | out: | |
104f5a62 | 1872 | if (ret) |
b4f85443 | 1873 | link->radar_required = false; |
104f5a62 | 1874 | |
649b2a4d JB |
1875 | mutex_unlock(&local->chanctx_mtx); |
1876 | return ret; | |
1877 | } | |
1878 | ||
b4f85443 | 1879 | int ieee80211_link_use_reserved_context(struct ieee80211_link_data *link) |
5bcae31d | 1880 | { |
b4f85443 | 1881 | struct ieee80211_sub_if_data *sdata = link->sdata; |
5bcae31d MK |
1882 | struct ieee80211_local *local = sdata->local; |
1883 | struct ieee80211_chanctx *new_ctx; | |
1884 | struct ieee80211_chanctx *old_ctx; | |
1885 | int err; | |
1886 | ||
1887 | lockdep_assert_held(&local->mtx); | |
1888 | lockdep_assert_held(&local->chanctx_mtx); | |
1889 | ||
b4f85443 JB |
1890 | new_ctx = link->reserved_chanctx; |
1891 | old_ctx = ieee80211_link_get_chanctx(link); | |
5bcae31d MK |
1892 | |
1893 | if (WARN_ON(!new_ctx)) | |
1894 | return -EINVAL; | |
1895 | ||
1896 | if (WARN_ON(new_ctx->replace_state == | |
1897 | IEEE80211_CHANCTX_WILL_BE_REPLACED)) | |
1898 | return -EINVAL; | |
1899 | ||
b4f85443 | 1900 | if (WARN_ON(link->reserved_ready)) |
5bcae31d MK |
1901 | return -EINVAL; |
1902 | ||
b4f85443 | 1903 | link->reserved_ready = true; |
5bcae31d MK |
1904 | |
1905 | if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) { | |
1906 | if (old_ctx) | |
b4f85443 | 1907 | return ieee80211_link_use_reserved_reassign(link); |
5bcae31d | 1908 | |
b4f85443 | 1909 | return ieee80211_link_use_reserved_assign(link); |
5bcae31d MK |
1910 | } |
1911 | ||
1912 | /* | |
1913 | * In-place reservation may need to be finalized now either if: | |
1914 | * a) sdata is taking part in the swapping itself and is the last one | |
1915 | * b) sdata has switched with a re-assign reservation to an existing | |
1916 | * context readying in-place switching of old_ctx | |
1917 | * | |
1918 | * In case of (b) do not propagate the error up because the requested | |
1919 | * sdata already switched successfully. Just spill an extra warning. | |
1920 | * The ieee80211_vif_use_reserved_switch() already stops all necessary | |
1921 | * interfaces upon failure. | |
1922 | */ | |
1923 | if ((old_ctx && | |
1924 | old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) || | |
1925 | new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) { | |
1926 | err = ieee80211_vif_use_reserved_switch(local); | |
1927 | if (err && err != -EAGAIN) { | |
1928 | if (new_ctx->replace_state == | |
1929 | IEEE80211_CHANCTX_REPLACES_OTHER) | |
1930 | return err; | |
1931 | ||
1932 | wiphy_info(local->hw.wiphy, | |
1933 | "depending in-place reservation failed (err=%d)\n", | |
1934 | err); | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | return 0; | |
73da7d5b SW |
1939 | } |
1940 | ||
b4f85443 JB |
1941 | int ieee80211_link_change_bandwidth(struct ieee80211_link_data *link, |
1942 | const struct cfg80211_chan_def *chandef, | |
aa87cd8b | 1943 | u64 *changed) |
2c9b7359 | 1944 | { |
b4f85443 | 1945 | struct ieee80211_sub_if_data *sdata = link->sdata; |
d8675a63 | 1946 | struct ieee80211_bss_conf *link_conf = link->conf; |
2c9b7359 JB |
1947 | struct ieee80211_local *local = sdata->local; |
1948 | struct ieee80211_chanctx_conf *conf; | |
1949 | struct ieee80211_chanctx *ctx; | |
5bcae31d | 1950 | const struct cfg80211_chan_def *compat; |
2c9b7359 JB |
1951 | int ret; |
1952 | ||
1953 | if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef, | |
1954 | IEEE80211_CHAN_DISABLED)) | |
1955 | return -EINVAL; | |
1956 | ||
1957 | mutex_lock(&local->chanctx_mtx); | |
b4f85443 | 1958 | if (cfg80211_chandef_identical(chandef, &link_conf->chandef)) { |
2c9b7359 JB |
1959 | ret = 0; |
1960 | goto out; | |
1961 | } | |
1962 | ||
1963 | if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT || | |
b4f85443 | 1964 | link_conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT) { |
2c9b7359 JB |
1965 | ret = -EINVAL; |
1966 | goto out; | |
1967 | } | |
1968 | ||
b4f85443 | 1969 | conf = rcu_dereference_protected(link_conf->chanctx_conf, |
2c9b7359 JB |
1970 | lockdep_is_held(&local->chanctx_mtx)); |
1971 | if (!conf) { | |
1972 | ret = -EINVAL; | |
1973 | goto out; | |
1974 | } | |
1975 | ||
1976 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
5bcae31d MK |
1977 | |
1978 | compat = cfg80211_chandef_compatible(&conf->def, chandef); | |
1979 | if (!compat) { | |
2c9b7359 JB |
1980 | ret = -EINVAL; |
1981 | goto out; | |
1982 | } | |
1983 | ||
5bcae31d MK |
1984 | switch (ctx->replace_state) { |
1985 | case IEEE80211_CHANCTX_REPLACE_NONE: | |
1986 | if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) { | |
1987 | ret = -EBUSY; | |
1988 | goto out; | |
1989 | } | |
1990 | break; | |
1991 | case IEEE80211_CHANCTX_WILL_BE_REPLACED: | |
d070f913 | 1992 | /* TODO: Perhaps the bandwidth change could be treated as a |
5bcae31d MK |
1993 | * reservation itself? */ |
1994 | ret = -EBUSY; | |
1995 | goto out; | |
1996 | case IEEE80211_CHANCTX_REPLACES_OTHER: | |
1997 | /* channel context that is going to replace another channel | |
1998 | * context doesn't really exist and shouldn't be assigned | |
1999 | * anywhere yet */ | |
2000 | WARN_ON(1); | |
2001 | break; | |
2002 | } | |
2003 | ||
b4f85443 | 2004 | ieee80211_link_update_chandef(link, chandef); |
2c9b7359 JB |
2005 | |
2006 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
2007 | ||
2008 | *changed |= BSS_CHANGED_BANDWIDTH; | |
2009 | ret = 0; | |
2010 | out: | |
2011 | mutex_unlock(&local->chanctx_mtx); | |
2012 | return ret; | |
2013 | } | |
2014 | ||
b4f85443 | 2015 | void ieee80211_link_release_channel(struct ieee80211_link_data *link) |
d01a1e65 | 2016 | { |
b4f85443 JB |
2017 | struct ieee80211_sub_if_data *sdata = link->sdata; |
2018 | ||
d01a1e65 | 2019 | mutex_lock(&sdata->local->chanctx_mtx); |
939c4c7e JB |
2020 | if (rcu_access_pointer(link->conf->chanctx_conf)) { |
2021 | lockdep_assert_held(&sdata->local->mtx); | |
2022 | __ieee80211_link_release_channel(link); | |
2023 | } | |
d01a1e65 MK |
2024 | mutex_unlock(&sdata->local->chanctx_mtx); |
2025 | } | |
3448c005 | 2026 | |
b4f85443 | 2027 | void ieee80211_link_vlan_copy_chanctx(struct ieee80211_link_data *link) |
4d76d21b | 2028 | { |
b4f85443 JB |
2029 | struct ieee80211_sub_if_data *sdata = link->sdata; |
2030 | unsigned int link_id = link->link_id; | |
d8675a63 JB |
2031 | struct ieee80211_bss_conf *link_conf = link->conf; |
2032 | struct ieee80211_bss_conf *ap_conf; | |
4d76d21b JB |
2033 | struct ieee80211_local *local = sdata->local; |
2034 | struct ieee80211_sub_if_data *ap; | |
2035 | struct ieee80211_chanctx_conf *conf; | |
2036 | ||
2037 | if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss)) | |
2038 | return; | |
2039 | ||
2040 | ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap); | |
2041 | ||
2042 | mutex_lock(&local->chanctx_mtx); | |
2043 | ||
d8675a63 JB |
2044 | rcu_read_lock(); |
2045 | ap_conf = rcu_dereference(ap->vif.link_conf[link_id]); | |
2046 | conf = rcu_dereference_protected(ap_conf->chanctx_conf, | |
4d76d21b | 2047 | lockdep_is_held(&local->chanctx_mtx)); |
b4f85443 | 2048 | rcu_assign_pointer(link_conf->chanctx_conf, conf); |
d8675a63 | 2049 | rcu_read_unlock(); |
4d76d21b JB |
2050 | mutex_unlock(&local->chanctx_mtx); |
2051 | } | |
2052 | ||
3448c005 JB |
2053 | void ieee80211_iter_chan_contexts_atomic( |
2054 | struct ieee80211_hw *hw, | |
2055 | void (*iter)(struct ieee80211_hw *hw, | |
2056 | struct ieee80211_chanctx_conf *chanctx_conf, | |
2057 | void *data), | |
2058 | void *iter_data) | |
2059 | { | |
2060 | struct ieee80211_local *local = hw_to_local(hw); | |
2061 | struct ieee80211_chanctx *ctx; | |
2062 | ||
2063 | rcu_read_lock(); | |
2064 | list_for_each_entry_rcu(ctx, &local->chanctx_list, list) | |
8a61af65 JB |
2065 | if (ctx->driver_present) |
2066 | iter(hw, &ctx->conf, iter_data); | |
3448c005 JB |
2067 | rcu_read_unlock(); |
2068 | } | |
2069 | EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic); |