Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b203ffc3 JM |
2 | /* |
3 | * Off-channel operation helpers | |
4 | * | |
5 | * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi> | |
6 | * Copyright 2004, Instant802 Networks, Inc. | |
7 | * Copyright 2005, Devicescape Software, Inc. | |
8 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
9 | * Copyright 2007, Michael Wu <flamingice@sourmilk.net> | |
10 | * Copyright 2009 Johannes Berg <johannes@sipsolutions.net> | |
c6968d4f | 11 | * Copyright (C) 2019, 2022-2023 Intel Corporation |
b203ffc3 | 12 | */ |
bc3b2d7f | 13 | #include <linux/export.h> |
b203ffc3 JM |
14 | #include <net/mac80211.h> |
15 | #include "ieee80211_i.h" | |
2eb278e0 | 16 | #include "driver-ops.h" |
b203ffc3 JM |
17 | |
18 | /* | |
b23b025f BG |
19 | * Tell our hardware to disable PS. |
20 | * Optionally inform AP that we will go to sleep so that it will buffer | |
21 | * the frames while we are doing off-channel work. This is optional | |
22 | * because we *may* be doing work on-operating channel, and want our | |
23 | * hardware unconditionally awake, but still let the AP send us normal frames. | |
b203ffc3 | 24 | */ |
559cef99 | 25 | static void ieee80211_offchannel_ps_enable(struct ieee80211_sub_if_data *sdata) |
b203ffc3 JM |
26 | { |
27 | struct ieee80211_local *local = sdata->local; | |
4730d597 | 28 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
dba0491f | 29 | bool offchannel_ps_enabled = false; |
b203ffc3 JM |
30 | |
31 | /* FIXME: what to do when local->pspolling is true? */ | |
32 | ||
33 | del_timer_sync(&local->dynamic_ps_timer); | |
3bc3c0d7 | 34 | del_timer_sync(&ifmgd->bcn_mon_timer); |
4730d597 LR |
35 | del_timer_sync(&ifmgd->conn_mon_timer); |
36 | ||
9fa659f9 | 37 | wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); |
b203ffc3 JM |
38 | |
39 | if (local->hw.conf.flags & IEEE80211_CONF_PS) { | |
dba0491f | 40 | offchannel_ps_enabled = true; |
b203ffc3 JM |
41 | local->hw.conf.flags &= ~IEEE80211_CONF_PS; |
42 | ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); | |
43 | } | |
44 | ||
dba0491f | 45 | if (!offchannel_ps_enabled || |
30686bf7 | 46 | !ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) |
b203ffc3 JM |
47 | /* |
48 | * If power save was enabled, no need to send a nullfunc | |
49 | * frame because AP knows that we are sleeping. But if the | |
50 | * hardware is creating the nullfunc frame for power save | |
51 | * status (ie. IEEE80211_HW_PS_NULLFUNC_STACK is not | |
52 | * enabled) and power save was enabled, the firmware just | |
53 | * sent a null frame with power save disabled. So we need | |
54 | * to send a new nullfunc frame to inform the AP that we | |
55 | * are again sleeping. | |
56 | */ | |
076cdcb1 | 57 | ieee80211_send_nullfunc(local, sdata, true); |
b203ffc3 JM |
58 | } |
59 | ||
dba0491f | 60 | /* inform AP that we are awake again */ |
b203ffc3 JM |
61 | static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata) |
62 | { | |
63 | struct ieee80211_local *local = sdata->local; | |
64 | ||
65 | if (!local->ps_sdata) | |
076cdcb1 | 66 | ieee80211_send_nullfunc(local, sdata, false); |
dba0491f | 67 | else if (local->hw.conf.dynamic_ps_timeout > 0) { |
b203ffc3 | 68 | /* |
dba0491f LP |
69 | * the dynamic_ps_timer had been running before leaving the |
70 | * operating channel, restart the timer now and send a nullfunc | |
71 | * frame to inform the AP that we are awake so that AP sends | |
72 | * the buffered packets (if any). | |
b203ffc3 | 73 | */ |
076cdcb1 | 74 | ieee80211_send_nullfunc(local, sdata, false); |
b203ffc3 JM |
75 | mod_timer(&local->dynamic_ps_timer, jiffies + |
76 | msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout)); | |
77 | } | |
4730d597 | 78 | |
3bc3c0d7 | 79 | ieee80211_sta_reset_beacon_monitor(sdata); |
4730d597 | 80 | ieee80211_sta_reset_conn_monitor(sdata); |
b203ffc3 JM |
81 | } |
82 | ||
aacde9ee | 83 | void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local) |
b203ffc3 JM |
84 | { |
85 | struct ieee80211_sub_if_data *sdata; | |
86 | ||
be0df01d JB |
87 | lockdep_assert_wiphy(local->hw.wiphy); |
88 | ||
fe57d9f5 JB |
89 | if (WARN_ON(local->use_chanctx)) |
90 | return; | |
91 | ||
b23b025f BG |
92 | /* |
93 | * notify the AP about us leaving the channel and stop all | |
94 | * STA interfaces. | |
95 | */ | |
6c17b77b | 96 | |
9c35d7d2 SF |
97 | /* |
98 | * Stop queues and transmit all frames queued by the driver | |
99 | * before sending nullfunc to enable powersave at the AP. | |
100 | */ | |
445ea4e8 | 101 | ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
102 | IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL, |
103 | false); | |
3b24f4c6 | 104 | ieee80211_flush_queues(local, NULL, false); |
6c17b77b | 105 | |
b203ffc3 JM |
106 | list_for_each_entry(sdata, &local->interfaces, list) { |
107 | if (!ieee80211_sdata_running(sdata)) | |
108 | continue; | |
109 | ||
708d50ed AB |
110 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || |
111 | sdata->vif.type == NL80211_IFTYPE_NAN) | |
f142c6b9 JB |
112 | continue; |
113 | ||
b23b025f BG |
114 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
115 | set_bit(SDATA_STATE_OFFCHANNEL, &sdata->state); | |
116 | ||
117 | /* Check to see if we should disable beaconing. */ | |
d6a83228 JB |
118 | if (sdata->vif.bss_conf.enable_beacon) { |
119 | set_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, | |
120 | &sdata->state); | |
121 | sdata->vif.bss_conf.enable_beacon = false; | |
7b7090b4 | 122 | ieee80211_link_info_change_notify( |
d8675a63 JB |
123 | sdata, &sdata->deflink, |
124 | BSS_CHANGED_BEACON_ENABLED); | |
d6a83228 | 125 | } |
b203ffc3 | 126 | |
6c17b77b SF |
127 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
128 | sdata->u.mgd.associated) | |
129 | ieee80211_offchannel_ps_enable(sdata); | |
b203ffc3 | 130 | } |
b203ffc3 JM |
131 | } |
132 | ||
aacde9ee | 133 | void ieee80211_offchannel_return(struct ieee80211_local *local) |
b203ffc3 JM |
134 | { |
135 | struct ieee80211_sub_if_data *sdata; | |
136 | ||
be0df01d JB |
137 | lockdep_assert_wiphy(local->hw.wiphy); |
138 | ||
fe57d9f5 JB |
139 | if (WARN_ON(local->use_chanctx)) |
140 | return; | |
141 | ||
b203ffc3 | 142 | list_for_each_entry(sdata, &local->interfaces, list) { |
f142c6b9 JB |
143 | if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE) |
144 | continue; | |
145 | ||
f6e8cb72 EP |
146 | if (sdata->vif.type != NL80211_IFTYPE_MONITOR) |
147 | clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state); | |
148 | ||
b203ffc3 JM |
149 | if (!ieee80211_sdata_running(sdata)) |
150 | continue; | |
151 | ||
152 | /* Tell AP we're back */ | |
aacde9ee SG |
153 | if (sdata->vif.type == NL80211_IFTYPE_STATION && |
154 | sdata->u.mgd.associated) | |
155 | ieee80211_offchannel_ps_disable(sdata); | |
b203ffc3 | 156 | |
d6a83228 JB |
157 | if (test_and_clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED, |
158 | &sdata->state)) { | |
159 | sdata->vif.bss_conf.enable_beacon = true; | |
7b7090b4 | 160 | ieee80211_link_info_change_notify( |
d8675a63 JB |
161 | sdata, &sdata->deflink, |
162 | BSS_CHANGED_BEACON_ENABLED); | |
d6a83228 | 163 | } |
b203ffc3 | 164 | } |
6c17b77b | 165 | |
445ea4e8 | 166 | ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP, |
cca07b00 LC |
167 | IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL, |
168 | false); | |
b203ffc3 | 169 | } |
21f83589 | 170 | |
aaa016cc | 171 | static void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc) |
2eb278e0 | 172 | { |
aaa016cc JB |
173 | /* was never transmitted */ |
174 | if (roc->frame) { | |
175 | cfg80211_mgmt_tx_status(&roc->sdata->wdev, roc->mgmt_tx_cookie, | |
176 | roc->frame->data, roc->frame->len, | |
177 | false, GFP_KERNEL); | |
178 | ieee80211_free_txskb(&roc->sdata->local->hw, roc->frame); | |
179 | } | |
180 | ||
181 | if (!roc->mgmt_tx_cookie) | |
182 | cfg80211_remain_on_channel_expired(&roc->sdata->wdev, | |
183 | roc->cookie, roc->chan, | |
184 | GFP_KERNEL); | |
ddb754aa JP |
185 | else |
186 | cfg80211_tx_mgmt_expired(&roc->sdata->wdev, | |
187 | roc->mgmt_tx_cookie, | |
188 | roc->chan, GFP_KERNEL); | |
aaa016cc JB |
189 | |
190 | list_del(&roc->list); | |
191 | kfree(roc); | |
192 | } | |
193 | ||
194 | static unsigned long ieee80211_end_finished_rocs(struct ieee80211_local *local, | |
195 | unsigned long now) | |
196 | { | |
197 | struct ieee80211_roc_work *roc, *tmp; | |
198 | long remaining_dur_min = LONG_MAX; | |
199 | ||
0cd8080e | 200 | lockdep_assert_wiphy(local->hw.wiphy); |
aaa016cc JB |
201 | |
202 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
203 | long remaining; | |
204 | ||
205 | if (!roc->started) | |
206 | break; | |
207 | ||
208 | remaining = roc->start_time + | |
209 | msecs_to_jiffies(roc->duration) - | |
210 | now; | |
211 | ||
1b894521 IP |
212 | /* In case of HW ROC, it is possible that the HW finished the |
213 | * ROC session before the actual requested time. In such a case | |
214 | * end the ROC session (disregarding the remaining time). | |
215 | */ | |
216 | if (roc->abort || roc->hw_begun || remaining <= 0) | |
aaa016cc JB |
217 | ieee80211_roc_notify_destroy(roc); |
218 | else | |
219 | remaining_dur_min = min(remaining_dur_min, remaining); | |
220 | } | |
221 | ||
222 | return remaining_dur_min; | |
223 | } | |
224 | ||
225 | static bool ieee80211_recalc_sw_work(struct ieee80211_local *local, | |
226 | unsigned long now) | |
227 | { | |
228 | long dur = ieee80211_end_finished_rocs(local, now); | |
229 | ||
230 | if (dur == LONG_MAX) | |
231 | return false; | |
232 | ||
97c19e42 | 233 | wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, dur); |
aaa016cc JB |
234 | return true; |
235 | } | |
236 | ||
237 | static void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc, | |
238 | unsigned long start_time) | |
239 | { | |
aaa016cc | 240 | if (WARN_ON(roc->notified)) |
2eb278e0 JB |
241 | return; |
242 | ||
aaa016cc JB |
243 | roc->start_time = start_time; |
244 | roc->started = true; | |
aaa016cc | 245 | |
2eb278e0 JB |
246 | if (roc->mgmt_tx_cookie) { |
247 | if (!WARN_ON(!roc->frame)) { | |
55de908a | 248 | ieee80211_tx_skb_tid_band(roc->sdata, roc->frame, 7, |
08aca29a | 249 | roc->chan->band); |
2eb278e0 JB |
250 | roc->frame = NULL; |
251 | } | |
252 | } else { | |
50febf6a | 253 | cfg80211_ready_on_channel(&roc->sdata->wdev, roc->cookie, |
42d97a59 JB |
254 | roc->chan, roc->req_duration, |
255 | GFP_KERNEL); | |
2eb278e0 JB |
256 | } |
257 | ||
258 | roc->notified = true; | |
259 | } | |
260 | ||
97c19e42 | 261 | static void ieee80211_hw_roc_start(struct wiphy *wiphy, struct wiphy_work *work) |
21f83589 JB |
262 | { |
263 | struct ieee80211_local *local = | |
264 | container_of(work, struct ieee80211_local, hw_roc_start); | |
aaa016cc | 265 | struct ieee80211_roc_work *roc; |
21f83589 | 266 | |
0cd8080e | 267 | lockdep_assert_wiphy(local->hw.wiphy); |
21f83589 | 268 | |
aaa016cc JB |
269 | list_for_each_entry(roc, &local->roc_list, list) { |
270 | if (!roc->started) | |
271 | break; | |
2eb278e0 | 272 | |
e6a8a3aa | 273 | roc->hw_begun = true; |
aaa016cc | 274 | ieee80211_handle_roc_started(roc, local->hw_roc_start_time); |
2eb278e0 | 275 | } |
21f83589 JB |
276 | } |
277 | ||
278 | void ieee80211_ready_on_channel(struct ieee80211_hw *hw) | |
279 | { | |
280 | struct ieee80211_local *local = hw_to_local(hw); | |
281 | ||
2eb278e0 JB |
282 | local->hw_roc_start_time = jiffies; |
283 | ||
21f83589 JB |
284 | trace_api_ready_on_channel(local); |
285 | ||
97c19e42 | 286 | wiphy_work_queue(hw->wiphy, &local->hw_roc_start); |
21f83589 JB |
287 | } |
288 | EXPORT_SYMBOL_GPL(ieee80211_ready_on_channel); | |
289 | ||
aaa016cc | 290 | static void _ieee80211_start_next_roc(struct ieee80211_local *local) |
21f83589 | 291 | { |
aaa016cc JB |
292 | struct ieee80211_roc_work *roc, *tmp; |
293 | enum ieee80211_roc_type type; | |
294 | u32 min_dur, max_dur; | |
21f83589 | 295 | |
0cd8080e | 296 | lockdep_assert_wiphy(local->hw.wiphy); |
21f83589 | 297 | |
aaa016cc | 298 | if (WARN_ON(list_empty(&local->roc_list))) |
21f83589 | 299 | return; |
21f83589 | 300 | |
2eb278e0 JB |
301 | roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work, |
302 | list); | |
71ecfa18 | 303 | |
aaa016cc | 304 | if (WARN_ON(roc->started)) |
0f6b3f59 JB |
305 | return; |
306 | ||
aaa016cc JB |
307 | min_dur = roc->duration; |
308 | max_dur = roc->duration; | |
309 | type = roc->type; | |
71ecfa18 | 310 | |
aaa016cc JB |
311 | list_for_each_entry(tmp, &local->roc_list, list) { |
312 | if (tmp == roc) | |
313 | continue; | |
314 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
315 | break; | |
316 | max_dur = max(tmp->duration, max_dur); | |
317 | min_dur = min(tmp->duration, min_dur); | |
318 | type = max(tmp->type, type); | |
319 | } | |
2eb278e0 | 320 | |
aaa016cc JB |
321 | if (local->ops->remain_on_channel) { |
322 | int ret = drv_remain_on_channel(local, roc->sdata, roc->chan, | |
323 | max_dur, type); | |
2eb278e0 JB |
324 | |
325 | if (ret) { | |
326 | wiphy_warn(local->hw.wiphy, | |
327 | "failed to start next HW ROC (%d)\n", ret); | |
328 | /* | |
329 | * queue the work struct again to avoid recursion | |
330 | * when multiple failures occur | |
331 | */ | |
aaa016cc JB |
332 | list_for_each_entry(tmp, &local->roc_list, list) { |
333 | if (tmp->sdata != roc->sdata || | |
334 | tmp->chan != roc->chan) | |
335 | break; | |
336 | tmp->started = true; | |
337 | tmp->abort = true; | |
338 | } | |
97c19e42 | 339 | wiphy_work_queue(local->hw.wiphy, &local->hw_roc_done); |
aaa016cc | 340 | return; |
2eb278e0 | 341 | } |
b4b177a5 | 342 | |
aaa016cc JB |
343 | /* we'll notify about the start once the HW calls back */ |
344 | list_for_each_entry(tmp, &local->roc_list, list) { | |
345 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
346 | break; | |
347 | tmp->started = true; | |
348 | } | |
349 | } else { | |
b4b177a5 JB |
350 | /* If actually operating on the desired channel (with at least |
351 | * 20 MHz channel width) don't stop all the operations but still | |
352 | * treat it as though the ROC operation started properly, so | |
353 | * other ROC operations won't interfere with this one. | |
354 | */ | |
355 | roc->on_channel = roc->chan == local->_oper_chandef.chan && | |
356 | local->_oper_chandef.width != NL80211_CHAN_WIDTH_5 && | |
357 | local->_oper_chandef.width != NL80211_CHAN_WIDTH_10; | |
21f83589 | 358 | |
b4b177a5 | 359 | /* start this ROC */ |
2eb278e0 JB |
360 | ieee80211_recalc_idle(local); |
361 | ||
b4b177a5 JB |
362 | if (!roc->on_channel) { |
363 | ieee80211_offchannel_stop_vifs(local); | |
364 | ||
365 | local->tmp_channel = roc->chan; | |
366 | ieee80211_hw_config(local, 0); | |
367 | } | |
2eb278e0 | 368 | |
97c19e42 JB |
369 | wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, |
370 | msecs_to_jiffies(min_dur)); | |
aaa016cc JB |
371 | |
372 | /* tell userspace or send frame(s) */ | |
373 | list_for_each_entry(tmp, &local->roc_list, list) { | |
374 | if (tmp->sdata != roc->sdata || tmp->chan != roc->chan) | |
375 | break; | |
376 | ||
377 | tmp->on_channel = roc->on_channel; | |
378 | ieee80211_handle_roc_started(tmp, jiffies); | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
383 | void ieee80211_start_next_roc(struct ieee80211_local *local) | |
384 | { | |
385 | struct ieee80211_roc_work *roc; | |
386 | ||
0cd8080e | 387 | lockdep_assert_wiphy(local->hw.wiphy); |
aaa016cc JB |
388 | |
389 | if (list_empty(&local->roc_list)) { | |
390 | ieee80211_run_deferred_scan(local); | |
391 | return; | |
392 | } | |
393 | ||
470f4d61 EP |
394 | /* defer roc if driver is not started (i.e. during reconfig) */ |
395 | if (local->in_reconfig) | |
396 | return; | |
397 | ||
aaa016cc JB |
398 | roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work, |
399 | list); | |
400 | ||
401 | if (WARN_ON_ONCE(roc->started)) | |
402 | return; | |
403 | ||
404 | if (local->ops->remain_on_channel) { | |
405 | _ieee80211_start_next_roc(local); | |
406 | } else { | |
407 | /* delay it a bit */ | |
97c19e42 JB |
408 | wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, |
409 | round_jiffies_relative(HZ / 2)); | |
aaa016cc JB |
410 | } |
411 | } | |
412 | ||
413 | static void __ieee80211_roc_work(struct ieee80211_local *local) | |
414 | { | |
415 | struct ieee80211_roc_work *roc; | |
416 | bool on_channel; | |
417 | ||
0cd8080e | 418 | lockdep_assert_wiphy(local->hw.wiphy); |
aaa016cc JB |
419 | |
420 | if (WARN_ON(local->ops->remain_on_channel)) | |
421 | return; | |
2eb278e0 | 422 | |
aaa016cc JB |
423 | roc = list_first_entry_or_null(&local->roc_list, |
424 | struct ieee80211_roc_work, list); | |
425 | if (!roc) | |
426 | return; | |
2eb278e0 | 427 | |
aaa016cc JB |
428 | if (!roc->started) { |
429 | WARN_ON(local->use_chanctx); | |
430 | _ieee80211_start_next_roc(local); | |
2eb278e0 | 431 | } else { |
b4b177a5 | 432 | on_channel = roc->on_channel; |
aaa016cc JB |
433 | if (ieee80211_recalc_sw_work(local, jiffies)) |
434 | return; | |
2eb278e0 | 435 | |
aaa016cc JB |
436 | /* careful - roc pointer became invalid during recalc */ |
437 | ||
438 | if (!on_channel) { | |
3b24f4c6 | 439 | ieee80211_flush_queues(local, NULL, false); |
2eb278e0 JB |
440 | |
441 | local->tmp_channel = NULL; | |
442 | ieee80211_hw_config(local, 0); | |
443 | ||
aacde9ee | 444 | ieee80211_offchannel_return(local); |
2eb278e0 JB |
445 | } |
446 | ||
447 | ieee80211_recalc_idle(local); | |
aaa016cc | 448 | ieee80211_start_next_roc(local); |
2eb278e0 | 449 | } |
aaa016cc | 450 | } |
2eb278e0 | 451 | |
97c19e42 | 452 | static void ieee80211_roc_work(struct wiphy *wiphy, struct wiphy_work *work) |
aaa016cc JB |
453 | { |
454 | struct ieee80211_local *local = | |
455 | container_of(work, struct ieee80211_local, roc_work.work); | |
456 | ||
0cd8080e JB |
457 | lockdep_assert_wiphy(local->hw.wiphy); |
458 | ||
aaa016cc | 459 | __ieee80211_roc_work(local); |
2eb278e0 JB |
460 | } |
461 | ||
97c19e42 | 462 | static void ieee80211_hw_roc_done(struct wiphy *wiphy, struct wiphy_work *work) |
2eb278e0 JB |
463 | { |
464 | struct ieee80211_local *local = | |
465 | container_of(work, struct ieee80211_local, hw_roc_done); | |
2eb278e0 | 466 | |
0cd8080e | 467 | lockdep_assert_wiphy(local->hw.wiphy); |
2eb278e0 | 468 | |
aaa016cc | 469 | ieee80211_end_finished_rocs(local, jiffies); |
2eb278e0 JB |
470 | |
471 | /* if there's another roc, start it now */ | |
472 | ieee80211_start_next_roc(local); | |
21f83589 JB |
473 | } |
474 | ||
475 | void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw) | |
476 | { | |
477 | struct ieee80211_local *local = hw_to_local(hw); | |
478 | ||
479 | trace_api_remain_on_channel_expired(local); | |
480 | ||
97c19e42 | 481 | wiphy_work_queue(hw->wiphy, &local->hw_roc_done); |
21f83589 JB |
482 | } |
483 | EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired); | |
484 | ||
aaa016cc JB |
485 | static bool |
486 | ieee80211_coalesce_hw_started_roc(struct ieee80211_local *local, | |
487 | struct ieee80211_roc_work *new_roc, | |
488 | struct ieee80211_roc_work *cur_roc) | |
a2fcfccb JB |
489 | { |
490 | unsigned long now = jiffies; | |
aaa016cc JB |
491 | unsigned long remaining; |
492 | ||
493 | if (WARN_ON(!cur_roc->started)) | |
494 | return false; | |
a2fcfccb | 495 | |
aaa016cc JB |
496 | /* if it was scheduled in the hardware, but not started yet, |
497 | * we can only combine if the older one had a longer duration | |
498 | */ | |
499 | if (!cur_roc->hw_begun && new_roc->duration > cur_roc->duration) | |
a2fcfccb JB |
500 | return false; |
501 | ||
aaa016cc JB |
502 | remaining = cur_roc->start_time + |
503 | msecs_to_jiffies(cur_roc->duration) - | |
504 | now; | |
505 | ||
a2fcfccb JB |
506 | /* if it doesn't fit entirely, schedule a new one */ |
507 | if (new_roc->duration > jiffies_to_msecs(remaining)) | |
508 | return false; | |
509 | ||
aaa016cc JB |
510 | /* add just after the current one so we combine their finish later */ |
511 | list_add(&new_roc->list, &cur_roc->list); | |
512 | ||
513 | /* if the existing one has already begun then let this one also | |
514 | * begin, otherwise they'll both be marked properly by the work | |
515 | * struct that runs once the driver notifies us of the beginning | |
516 | */ | |
e6a8a3aa JB |
517 | if (cur_roc->hw_begun) { |
518 | new_roc->hw_begun = true; | |
aaa016cc | 519 | ieee80211_handle_roc_started(new_roc, now); |
e6a8a3aa | 520 | } |
a2fcfccb | 521 | |
a2fcfccb JB |
522 | return true; |
523 | } | |
524 | ||
525 | static int ieee80211_start_roc_work(struct ieee80211_local *local, | |
526 | struct ieee80211_sub_if_data *sdata, | |
527 | struct ieee80211_channel *channel, | |
528 | unsigned int duration, u64 *cookie, | |
529 | struct sk_buff *txskb, | |
530 | enum ieee80211_roc_type type) | |
531 | { | |
532 | struct ieee80211_roc_work *roc, *tmp; | |
aaa016cc | 533 | bool queued = false, combine_started = true; |
a2fcfccb JB |
534 | int ret; |
535 | ||
0cd8080e | 536 | lockdep_assert_wiphy(local->hw.wiphy); |
a2fcfccb | 537 | |
b6011960 TP |
538 | if (channel->freq_offset) |
539 | /* this may work, but is untested */ | |
540 | return -EOPNOTSUPP; | |
541 | ||
a2fcfccb JB |
542 | if (local->use_chanctx && !local->ops->remain_on_channel) |
543 | return -EOPNOTSUPP; | |
544 | ||
545 | roc = kzalloc(sizeof(*roc), GFP_KERNEL); | |
546 | if (!roc) | |
547 | return -ENOMEM; | |
548 | ||
549 | /* | |
550 | * If the duration is zero, then the driver | |
551 | * wouldn't actually do anything. Set it to | |
552 | * 10 for now. | |
553 | * | |
554 | * TODO: cancel the off-channel operation | |
555 | * when we get the SKB's TX status and | |
556 | * the wait time was zero before. | |
557 | */ | |
558 | if (!duration) | |
559 | duration = 10; | |
560 | ||
561 | roc->chan = channel; | |
562 | roc->duration = duration; | |
563 | roc->req_duration = duration; | |
564 | roc->frame = txskb; | |
565 | roc->type = type; | |
566 | roc->sdata = sdata; | |
a2fcfccb JB |
567 | |
568 | /* | |
569 | * cookie is either the roc cookie (for normal roc) | |
570 | * or the SKB (for mgmt TX) | |
571 | */ | |
572 | if (!txskb) { | |
573 | roc->cookie = ieee80211_mgmt_tx_cookie(local); | |
574 | *cookie = roc->cookie; | |
575 | } else { | |
576 | roc->mgmt_tx_cookie = *cookie; | |
577 | } | |
578 | ||
aaa016cc JB |
579 | /* if there's no need to queue, handle it immediately */ |
580 | if (list_empty(&local->roc_list) && | |
581 | !local->scanning && !ieee80211_is_radar_required(local)) { | |
582 | /* if not HW assist, just queue & schedule work */ | |
583 | if (!local->ops->remain_on_channel) { | |
584 | list_add_tail(&roc->list, &local->roc_list); | |
97c19e42 JB |
585 | wiphy_delayed_work_queue(local->hw.wiphy, |
586 | &local->roc_work, 0); | |
aaa016cc JB |
587 | } else { |
588 | /* otherwise actually kick it off here | |
589 | * (for error handling) | |
590 | */ | |
591 | ret = drv_remain_on_channel(local, sdata, channel, | |
592 | duration, type); | |
593 | if (ret) { | |
594 | kfree(roc); | |
595 | return ret; | |
596 | } | |
597 | roc->started = true; | |
598 | list_add_tail(&roc->list, &local->roc_list); | |
599 | } | |
a2fcfccb | 600 | |
aaa016cc | 601 | return 0; |
a2fcfccb JB |
602 | } |
603 | ||
aaa016cc | 604 | /* otherwise handle queueing */ |
a2fcfccb | 605 | |
a2fcfccb JB |
606 | list_for_each_entry(tmp, &local->roc_list, list) { |
607 | if (tmp->chan != channel || tmp->sdata != sdata) | |
608 | continue; | |
609 | ||
610 | /* | |
aaa016cc JB |
611 | * Extend this ROC if possible: If it hasn't started, add |
612 | * just after the new one to combine. | |
a2fcfccb JB |
613 | */ |
614 | if (!tmp->started) { | |
aaa016cc | 615 | list_add(&roc->list, &tmp->list); |
a2fcfccb JB |
616 | queued = true; |
617 | break; | |
618 | } | |
619 | ||
aaa016cc JB |
620 | if (!combine_started) |
621 | continue; | |
a2fcfccb | 622 | |
aaa016cc JB |
623 | if (!local->ops->remain_on_channel) { |
624 | /* If there's no hardware remain-on-channel, and | |
625 | * doing so won't push us over the maximum r-o-c | |
626 | * we allow, then we can just add the new one to | |
627 | * the list and mark it as having started now. | |
628 | * If it would push over the limit, don't try to | |
629 | * combine with other started ones (that haven't | |
630 | * been running as long) but potentially sort it | |
631 | * with others that had the same fate. | |
a2fcfccb | 632 | */ |
aaa016cc JB |
633 | unsigned long now = jiffies; |
634 | u32 elapsed = jiffies_to_msecs(now - tmp->start_time); | |
635 | struct wiphy *wiphy = local->hw.wiphy; | |
636 | u32 max_roc = wiphy->max_remain_on_channel_duration; | |
a2fcfccb | 637 | |
aaa016cc JB |
638 | if (elapsed + roc->duration > max_roc) { |
639 | combine_started = false; | |
640 | continue; | |
641 | } | |
a2fcfccb | 642 | |
aaa016cc JB |
643 | list_add(&roc->list, &tmp->list); |
644 | queued = true; | |
645 | roc->on_channel = tmp->on_channel; | |
646 | ieee80211_handle_roc_started(roc, now); | |
e9db4557 | 647 | ieee80211_recalc_sw_work(local, now); |
aaa016cc | 648 | break; |
a2fcfccb | 649 | } |
aaa016cc JB |
650 | |
651 | queued = ieee80211_coalesce_hw_started_roc(local, roc, tmp); | |
652 | if (queued) | |
653 | break; | |
654 | /* if it wasn't queued, perhaps it can be combined with | |
655 | * another that also couldn't get combined previously, | |
656 | * but no need to check for already started ones, since | |
657 | * that can't work. | |
658 | */ | |
659 | combine_started = false; | |
a2fcfccb JB |
660 | } |
661 | ||
a2fcfccb JB |
662 | if (!queued) |
663 | list_add_tail(&roc->list, &local->roc_list); | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev, | |
669 | struct ieee80211_channel *chan, | |
670 | unsigned int duration, u64 *cookie) | |
671 | { | |
672 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
673 | struct ieee80211_local *local = sdata->local; | |
a2fcfccb | 674 | |
0cd8080e | 675 | lockdep_assert_wiphy(local->hw.wiphy); |
a2fcfccb | 676 | |
0cd8080e JB |
677 | return ieee80211_start_roc_work(local, sdata, chan, |
678 | duration, cookie, NULL, | |
679 | IEEE80211_ROC_TYPE_NORMAL); | |
a2fcfccb JB |
680 | } |
681 | ||
682 | static int ieee80211_cancel_roc(struct ieee80211_local *local, | |
683 | u64 cookie, bool mgmt_tx) | |
684 | { | |
685 | struct ieee80211_roc_work *roc, *tmp, *found = NULL; | |
686 | int ret; | |
687 | ||
0cd8080e JB |
688 | lockdep_assert_wiphy(local->hw.wiphy); |
689 | ||
7d37fcd4 JB |
690 | if (!cookie) |
691 | return -ENOENT; | |
692 | ||
97c19e42 | 693 | wiphy_work_flush(local->hw.wiphy, &local->hw_roc_start); |
6e46d8ce | 694 | |
a2fcfccb | 695 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { |
a2fcfccb JB |
696 | if (!mgmt_tx && roc->cookie != cookie) |
697 | continue; | |
698 | else if (mgmt_tx && roc->mgmt_tx_cookie != cookie) | |
699 | continue; | |
700 | ||
701 | found = roc; | |
702 | break; | |
703 | } | |
704 | ||
705 | if (!found) { | |
a2fcfccb JB |
706 | return -ENOENT; |
707 | } | |
708 | ||
aaa016cc JB |
709 | if (!found->started) { |
710 | ieee80211_roc_notify_destroy(found); | |
711 | goto out_unlock; | |
712 | } | |
a2fcfccb JB |
713 | |
714 | if (local->ops->remain_on_channel) { | |
5db4c4b9 | 715 | ret = drv_cancel_remain_on_channel(local, roc->sdata); |
aaa016cc | 716 | if (WARN_ON_ONCE(ret)) { |
aaa016cc | 717 | return ret; |
a2fcfccb JB |
718 | } |
719 | ||
aaa016cc JB |
720 | /* TODO: |
721 | * if multiple items were combined here then we really shouldn't | |
722 | * cancel them all - we should wait for as much time as needed | |
723 | * for the longest remaining one, and only then cancel ... | |
724 | */ | |
725 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { | |
726 | if (!roc->started) | |
727 | break; | |
728 | if (roc == found) | |
729 | found = NULL; | |
730 | ieee80211_roc_notify_destroy(roc); | |
731 | } | |
a2fcfccb | 732 | |
aaa016cc JB |
733 | /* that really must not happen - it was started */ |
734 | WARN_ON(found); | |
a2fcfccb | 735 | |
aaa016cc | 736 | ieee80211_start_next_roc(local); |
a2fcfccb | 737 | } else { |
aaa016cc | 738 | /* go through work struct to return to the operating channel */ |
a2fcfccb | 739 | found->abort = true; |
97c19e42 | 740 | wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, 0); |
a2fcfccb JB |
741 | } |
742 | ||
aaa016cc | 743 | out_unlock: |
aaa016cc | 744 | |
a2fcfccb JB |
745 | return 0; |
746 | } | |
747 | ||
748 | int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy, | |
749 | struct wireless_dev *wdev, u64 cookie) | |
750 | { | |
751 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
752 | struct ieee80211_local *local = sdata->local; | |
753 | ||
754 | return ieee80211_cancel_roc(local, cookie, false); | |
755 | } | |
756 | ||
757 | int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev, | |
758 | struct cfg80211_mgmt_tx_params *params, u64 *cookie) | |
759 | { | |
760 | struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev); | |
761 | struct ieee80211_local *local = sdata->local; | |
5ee00dbd | 762 | struct sk_buff *skb; |
e1e68b14 | 763 | struct sta_info *sta = NULL; |
a2fcfccb JB |
764 | const struct ieee80211_mgmt *mgmt = (void *)params->buf; |
765 | bool need_offchan = false; | |
e1e68b14 JB |
766 | bool mlo_sta = false; |
767 | int link_id = -1; | |
a2fcfccb JB |
768 | u32 flags; |
769 | int ret; | |
770 | u8 *data; | |
771 | ||
0cd8080e JB |
772 | lockdep_assert_wiphy(local->hw.wiphy); |
773 | ||
a2fcfccb JB |
774 | if (params->dont_wait_for_ack) |
775 | flags = IEEE80211_TX_CTL_NO_ACK; | |
776 | else | |
777 | flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX | | |
778 | IEEE80211_TX_CTL_REQ_TX_STATUS; | |
779 | ||
780 | if (params->no_cck) | |
781 | flags |= IEEE80211_TX_CTL_NO_CCK_RATE; | |
782 | ||
783 | switch (sdata->vif.type) { | |
784 | case NL80211_IFTYPE_ADHOC: | |
f276e20b | 785 | if (!sdata->vif.cfg.ibss_joined) |
a2fcfccb | 786 | need_offchan = true; |
a2fcfccb | 787 | #ifdef CONFIG_MAC80211_MESH |
fc0561dc | 788 | fallthrough; |
a2fcfccb JB |
789 | case NL80211_IFTYPE_MESH_POINT: |
790 | if (ieee80211_vif_is_mesh(&sdata->vif) && | |
791 | !sdata->u.mesh.mesh_id_len) | |
792 | need_offchan = true; | |
a2fcfccb | 793 | #endif |
fc0561dc | 794 | fallthrough; |
a2fcfccb JB |
795 | case NL80211_IFTYPE_AP: |
796 | case NL80211_IFTYPE_AP_VLAN: | |
797 | case NL80211_IFTYPE_P2P_GO: | |
798 | if (sdata->vif.type != NL80211_IFTYPE_ADHOC && | |
799 | !ieee80211_vif_is_mesh(&sdata->vif) && | |
bfd8403a | 800 | !sdata->bss->active) |
a2fcfccb | 801 | need_offchan = true; |
e1e68b14 JB |
802 | |
803 | rcu_read_lock(); | |
804 | sta = sta_info_get_bss(sdata, mgmt->da); | |
805 | mlo_sta = sta && sta->sta.mlo; | |
806 | ||
a2fcfccb JB |
807 | if (!ieee80211_is_action(mgmt->frame_control) || |
808 | mgmt->u.action.category == WLAN_CATEGORY_PUBLIC || | |
809 | mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED || | |
e1e68b14 JB |
810 | mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { |
811 | rcu_read_unlock(); | |
a2fcfccb | 812 | break; |
e1e68b14 JB |
813 | } |
814 | ||
815 | if (!sta) { | |
816 | rcu_read_unlock(); | |
a2fcfccb | 817 | return -ENOLINK; |
e1e68b14 JB |
818 | } |
819 | if (params->link_id >= 0 && | |
820 | !(sta->sta.valid_links & BIT(params->link_id))) { | |
821 | rcu_read_unlock(); | |
822 | return -ENOLINK; | |
823 | } | |
824 | link_id = params->link_id; | |
825 | rcu_read_unlock(); | |
a2fcfccb JB |
826 | break; |
827 | case NL80211_IFTYPE_STATION: | |
828 | case NL80211_IFTYPE_P2P_CLIENT: | |
a2fcfccb JB |
829 | if (!sdata->u.mgd.associated || |
830 | (params->offchan && params->wait && | |
831 | local->ops->remain_on_channel && | |
563fe446 | 832 | memcmp(sdata->vif.cfg.ap_addr, mgmt->bssid, ETH_ALEN))) { |
a2fcfccb | 833 | need_offchan = true; |
563fe446 IP |
834 | } else if (sdata->u.mgd.associated && |
835 | ether_addr_equal(sdata->vif.cfg.ap_addr, mgmt->da)) { | |
836 | sta = sta_info_get_bss(sdata, mgmt->da); | |
837 | mlo_sta = sta && sta->sta.mlo; | |
838 | } | |
a2fcfccb JB |
839 | break; |
840 | case NL80211_IFTYPE_P2P_DEVICE: | |
841 | need_offchan = true; | |
842 | break; | |
cb3b7d87 | 843 | case NL80211_IFTYPE_NAN: |
a2fcfccb JB |
844 | default: |
845 | return -EOPNOTSUPP; | |
846 | } | |
847 | ||
848 | /* configurations requiring offchan cannot work if no channel has been | |
849 | * specified | |
850 | */ | |
851 | if (need_offchan && !params->chan) | |
852 | return -EINVAL; | |
853 | ||
a2fcfccb | 854 | /* Check if the operating channel is the requested channel */ |
e1e68b14 JB |
855 | if (!params->chan && mlo_sta) { |
856 | need_offchan = false; | |
857 | } else if (!need_offchan) { | |
54283409 AO |
858 | struct ieee80211_chanctx_conf *chanctx_conf = NULL; |
859 | int i; | |
a2fcfccb JB |
860 | |
861 | rcu_read_lock(); | |
54283409 AO |
862 | /* Check all the links first */ |
863 | for (i = 0; i < ARRAY_SIZE(sdata->vif.link_conf); i++) { | |
d8675a63 JB |
864 | struct ieee80211_bss_conf *conf; |
865 | ||
866 | conf = rcu_dereference(sdata->vif.link_conf[i]); | |
867 | if (!conf) | |
54283409 AO |
868 | continue; |
869 | ||
d8675a63 | 870 | chanctx_conf = rcu_dereference(conf->chanctx_conf); |
54283409 AO |
871 | if (!chanctx_conf) |
872 | continue; | |
873 | ||
e1e68b14 JB |
874 | if (mlo_sta && params->chan == chanctx_conf->def.chan && |
875 | ether_addr_equal(sdata->vif.addr, mgmt->sa)) { | |
876 | link_id = i; | |
877 | break; | |
878 | } | |
879 | ||
d8675a63 | 880 | if (ether_addr_equal(conf->addr, mgmt->sa)) |
54283409 AO |
881 | break; |
882 | ||
883 | chanctx_conf = NULL; | |
884 | } | |
a2fcfccb JB |
885 | |
886 | if (chanctx_conf) { | |
887 | need_offchan = params->chan && | |
888 | (params->chan != | |
889 | chanctx_conf->def.chan); | |
a2fcfccb JB |
890 | } else { |
891 | need_offchan = true; | |
892 | } | |
893 | rcu_read_unlock(); | |
894 | } | |
895 | ||
896 | if (need_offchan && !params->offchan) { | |
897 | ret = -EBUSY; | |
898 | goto out_unlock; | |
899 | } | |
900 | ||
901 | skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len); | |
902 | if (!skb) { | |
903 | ret = -ENOMEM; | |
904 | goto out_unlock; | |
905 | } | |
906 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
907 | ||
59ae1d12 | 908 | data = skb_put_data(skb, params->buf, params->len); |
a2fcfccb JB |
909 | |
910 | /* Update CSA counters */ | |
d0a9123e | 911 | if (sdata->vif.bss_conf.csa_active && |
a2fcfccb JB |
912 | (sdata->vif.type == NL80211_IFTYPE_AP || |
913 | sdata->vif.type == NL80211_IFTYPE_MESH_POINT || | |
914 | sdata->vif.type == NL80211_IFTYPE_ADHOC) && | |
915 | params->n_csa_offsets) { | |
916 | int i; | |
917 | struct beacon_data *beacon = NULL; | |
918 | ||
919 | rcu_read_lock(); | |
920 | ||
921 | if (sdata->vif.type == NL80211_IFTYPE_AP) | |
bfd8403a | 922 | beacon = rcu_dereference(sdata->deflink.u.ap.beacon); |
a2fcfccb JB |
923 | else if (sdata->vif.type == NL80211_IFTYPE_ADHOC) |
924 | beacon = rcu_dereference(sdata->u.ibss.presp); | |
925 | else if (ieee80211_vif_is_mesh(&sdata->vif)) | |
926 | beacon = rcu_dereference(sdata->u.mesh.beacon); | |
927 | ||
928 | if (beacon) | |
929 | for (i = 0; i < params->n_csa_offsets; i++) | |
930 | data[params->csa_offsets[i]] = | |
8552a434 | 931 | beacon->cntdwn_current_counter; |
a2fcfccb JB |
932 | |
933 | rcu_read_unlock(); | |
934 | } | |
935 | ||
936 | IEEE80211_SKB_CB(skb)->flags = flags; | |
937 | ||
938 | skb->dev = sdata->dev; | |
939 | ||
940 | if (!params->dont_wait_for_ack) { | |
941 | /* make a copy to preserve the frame contents | |
942 | * in case of encryption. | |
943 | */ | |
5ee00dbd JB |
944 | ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_KERNEL); |
945 | if (ret) { | |
a2fcfccb JB |
946 | kfree_skb(skb); |
947 | goto out_unlock; | |
948 | } | |
949 | } else { | |
950 | /* Assign a dummy non-zero cookie, it's not sent to | |
951 | * userspace in this case but we rely on its value | |
952 | * internally in the need_offchan case to distinguish | |
953 | * mgmt-tx from remain-on-channel. | |
954 | */ | |
955 | *cookie = 0xffffffff; | |
956 | } | |
957 | ||
958 | if (!need_offchan) { | |
e1e68b14 | 959 | ieee80211_tx_skb_tid(sdata, skb, 7, link_id); |
a2fcfccb JB |
960 | ret = 0; |
961 | goto out_unlock; | |
962 | } | |
963 | ||
964 | IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN | | |
965 | IEEE80211_TX_INTFL_OFFCHAN_TX_OK; | |
966 | if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) | |
967 | IEEE80211_SKB_CB(skb)->hw_queue = | |
968 | local->hw.offchannel_tx_hw_queue; | |
969 | ||
970 | /* This will handle all kinds of coalescing and immediate TX */ | |
971 | ret = ieee80211_start_roc_work(local, sdata, params->chan, | |
972 | params->wait, cookie, skb, | |
973 | IEEE80211_ROC_TYPE_MGMT_TX); | |
974 | if (ret) | |
975 | ieee80211_free_txskb(&local->hw, skb); | |
976 | out_unlock: | |
a2fcfccb JB |
977 | return ret; |
978 | } | |
979 | ||
980 | int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy, | |
981 | struct wireless_dev *wdev, u64 cookie) | |
982 | { | |
983 | struct ieee80211_local *local = wiphy_priv(wiphy); | |
984 | ||
985 | return ieee80211_cancel_roc(local, cookie, true); | |
986 | } | |
987 | ||
2eb278e0 | 988 | void ieee80211_roc_setup(struct ieee80211_local *local) |
21f83589 | 989 | { |
97c19e42 JB |
990 | wiphy_work_init(&local->hw_roc_start, ieee80211_hw_roc_start); |
991 | wiphy_work_init(&local->hw_roc_done, ieee80211_hw_roc_done); | |
992 | wiphy_delayed_work_init(&local->roc_work, ieee80211_roc_work); | |
2eb278e0 JB |
993 | INIT_LIST_HEAD(&local->roc_list); |
994 | } | |
995 | ||
c8f994ee JB |
996 | void ieee80211_roc_purge(struct ieee80211_local *local, |
997 | struct ieee80211_sub_if_data *sdata) | |
2eb278e0 | 998 | { |
2eb278e0 | 999 | struct ieee80211_roc_work *roc, *tmp; |
aaa016cc | 1000 | bool work_to_do = false; |
2eb278e0 | 1001 | |
0cd8080e JB |
1002 | lockdep_assert_wiphy(local->hw.wiphy); |
1003 | ||
2eb278e0 | 1004 | list_for_each_entry_safe(roc, tmp, &local->roc_list, list) { |
c8f994ee | 1005 | if (sdata && roc->sdata != sdata) |
2eb278e0 JB |
1006 | continue; |
1007 | ||
aaa016cc JB |
1008 | if (roc->started) { |
1009 | if (local->ops->remain_on_channel) { | |
1010 | /* can race, so ignore return value */ | |
c6968d4f | 1011 | drv_cancel_remain_on_channel(local, roc->sdata); |
aaa016cc JB |
1012 | ieee80211_roc_notify_destroy(roc); |
1013 | } else { | |
1014 | roc->abort = true; | |
1015 | work_to_do = true; | |
1016 | } | |
2eb278e0 | 1017 | } else { |
aaa016cc | 1018 | ieee80211_roc_notify_destroy(roc); |
2eb278e0 JB |
1019 | } |
1020 | } | |
aaa016cc JB |
1021 | if (work_to_do) |
1022 | __ieee80211_roc_work(local); | |
21f83589 | 1023 | } |