2 * Off-channel operation helpers
4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Copyright 2004, Instant802 Networks, Inc.
6 * Copyright 2005, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
15 #include <linux/export.h>
16 #include <net/mac80211.h>
17 #include "ieee80211_i.h"
18 #include "driver-ops.h"
21 * Tell our hardware to disable PS.
22 * Optionally inform AP that we will go to sleep so that it will buffer
23 * the frames while we are doing off-channel work. This is optional
24 * because we *may* be doing work on-operating channel, and want our
25 * hardware unconditionally awake, but still let the AP send us normal frames.
27 static void ieee80211_offchannel_ps_enable(struct ieee80211_sub_if_data *sdata)
29 struct ieee80211_local *local = sdata->local;
30 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
32 local->offchannel_ps_enabled = false;
34 /* FIXME: what to do when local->pspolling is true? */
36 del_timer_sync(&local->dynamic_ps_timer);
37 del_timer_sync(&ifmgd->bcn_mon_timer);
38 del_timer_sync(&ifmgd->conn_mon_timer);
40 cancel_work_sync(&local->dynamic_ps_enable_work);
42 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
43 local->offchannel_ps_enabled = true;
44 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
45 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
48 if (!local->offchannel_ps_enabled ||
49 !ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
51 * If power save was enabled, no need to send a nullfunc
52 * frame because AP knows that we are sleeping. But if the
53 * hardware is creating the nullfunc frame for power save
54 * status (ie. IEEE80211_HW_PS_NULLFUNC_STACK is not
55 * enabled) and power save was enabled, the firmware just
56 * sent a null frame with power save disabled. So we need
57 * to send a new nullfunc frame to inform the AP that we
60 ieee80211_send_nullfunc(local, sdata, true);
63 /* inform AP that we are awake again, unless power save is enabled */
64 static void ieee80211_offchannel_ps_disable(struct ieee80211_sub_if_data *sdata)
66 struct ieee80211_local *local = sdata->local;
69 ieee80211_send_nullfunc(local, sdata, false);
70 else if (local->offchannel_ps_enabled) {
72 * In !IEEE80211_HW_PS_NULLFUNC_STACK case the hardware
73 * will send a nullfunc frame with the powersave bit set
74 * even though the AP already knows that we are sleeping.
75 * This could be avoided by sending a null frame with power
76 * save bit disabled before enabling the power save, but
77 * this doesn't gain anything.
79 * When IEEE80211_HW_PS_NULLFUNC_STACK is enabled, no need
80 * to send a nullfunc frame because AP already knows that
81 * we are sleeping, let's just enable power save mode in
84 /* TODO: Only set hardware if CONF_PS changed?
85 * TODO: Should we set offchannel_ps_enabled to false?
87 local->hw.conf.flags |= IEEE80211_CONF_PS;
88 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
89 } else if (local->hw.conf.dynamic_ps_timeout > 0) {
91 * If IEEE80211_CONF_PS was not set and the dynamic_ps_timer
92 * had been running before leaving the operating channel,
93 * restart the timer now and send a nullfunc frame to inform
94 * the AP that we are awake.
96 ieee80211_send_nullfunc(local, sdata, false);
97 mod_timer(&local->dynamic_ps_timer, jiffies +
98 msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
101 ieee80211_sta_reset_beacon_monitor(sdata);
102 ieee80211_sta_reset_conn_monitor(sdata);
105 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local)
107 struct ieee80211_sub_if_data *sdata;
109 if (WARN_ON(local->use_chanctx))
113 * notify the AP about us leaving the channel and stop all
118 * Stop queues and transmit all frames queued by the driver
119 * before sending nullfunc to enable powersave at the AP.
121 ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
122 IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
124 ieee80211_flush_queues(local, NULL, false);
126 mutex_lock(&local->iflist_mtx);
127 list_for_each_entry(sdata, &local->interfaces, list) {
128 if (!ieee80211_sdata_running(sdata))
131 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
134 if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
135 set_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
137 /* Check to see if we should disable beaconing. */
138 if (sdata->vif.bss_conf.enable_beacon) {
139 set_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
141 sdata->vif.bss_conf.enable_beacon = false;
142 ieee80211_bss_info_change_notify(
143 sdata, BSS_CHANGED_BEACON_ENABLED);
146 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
147 sdata->u.mgd.associated)
148 ieee80211_offchannel_ps_enable(sdata);
150 mutex_unlock(&local->iflist_mtx);
153 void ieee80211_offchannel_return(struct ieee80211_local *local)
155 struct ieee80211_sub_if_data *sdata;
157 if (WARN_ON(local->use_chanctx))
160 mutex_lock(&local->iflist_mtx);
161 list_for_each_entry(sdata, &local->interfaces, list) {
162 if (sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE)
165 if (sdata->vif.type != NL80211_IFTYPE_MONITOR)
166 clear_bit(SDATA_STATE_OFFCHANNEL, &sdata->state);
168 if (!ieee80211_sdata_running(sdata))
171 /* Tell AP we're back */
172 if (sdata->vif.type == NL80211_IFTYPE_STATION &&
173 sdata->u.mgd.associated)
174 ieee80211_offchannel_ps_disable(sdata);
176 if (test_and_clear_bit(SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
178 sdata->vif.bss_conf.enable_beacon = true;
179 ieee80211_bss_info_change_notify(
180 sdata, BSS_CHANGED_BEACON_ENABLED);
183 mutex_unlock(&local->iflist_mtx);
185 ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
186 IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
190 static void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc)
192 /* was never transmitted */
194 cfg80211_mgmt_tx_status(&roc->sdata->wdev, roc->mgmt_tx_cookie,
195 roc->frame->data, roc->frame->len,
197 ieee80211_free_txskb(&roc->sdata->local->hw, roc->frame);
200 if (!roc->mgmt_tx_cookie)
201 cfg80211_remain_on_channel_expired(&roc->sdata->wdev,
202 roc->cookie, roc->chan,
205 list_del(&roc->list);
209 static unsigned long ieee80211_end_finished_rocs(struct ieee80211_local *local,
212 struct ieee80211_roc_work *roc, *tmp;
213 long remaining_dur_min = LONG_MAX;
215 lockdep_assert_held(&local->mtx);
217 list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
223 remaining = roc->start_time +
224 msecs_to_jiffies(roc->duration) -
227 /* In case of HW ROC, it is possible that the HW finished the
228 * ROC session before the actual requested time. In such a case
229 * end the ROC session (disregarding the remaining time).
231 if (roc->abort || roc->hw_begun || remaining <= 0)
232 ieee80211_roc_notify_destroy(roc);
234 remaining_dur_min = min(remaining_dur_min, remaining);
237 return remaining_dur_min;
240 static bool ieee80211_recalc_sw_work(struct ieee80211_local *local,
243 long dur = ieee80211_end_finished_rocs(local, now);
248 mod_delayed_work(local->workqueue, &local->roc_work, dur);
252 static void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc,
253 unsigned long start_time)
255 if (WARN_ON(roc->notified))
258 roc->start_time = start_time;
261 if (roc->mgmt_tx_cookie) {
262 if (!WARN_ON(!roc->frame)) {
263 ieee80211_tx_skb_tid_band(roc->sdata, roc->frame, 7,
268 cfg80211_ready_on_channel(&roc->sdata->wdev, roc->cookie,
269 roc->chan, roc->req_duration,
273 roc->notified = true;
276 static void ieee80211_hw_roc_start(struct work_struct *work)
278 struct ieee80211_local *local =
279 container_of(work, struct ieee80211_local, hw_roc_start);
280 struct ieee80211_roc_work *roc;
282 mutex_lock(&local->mtx);
284 list_for_each_entry(roc, &local->roc_list, list) {
288 roc->hw_begun = true;
289 ieee80211_handle_roc_started(roc, local->hw_roc_start_time);
292 mutex_unlock(&local->mtx);
295 void ieee80211_ready_on_channel(struct ieee80211_hw *hw)
297 struct ieee80211_local *local = hw_to_local(hw);
299 local->hw_roc_start_time = jiffies;
301 trace_api_ready_on_channel(local);
303 ieee80211_queue_work(hw, &local->hw_roc_start);
305 EXPORT_SYMBOL_GPL(ieee80211_ready_on_channel);
307 static void _ieee80211_start_next_roc(struct ieee80211_local *local)
309 struct ieee80211_roc_work *roc, *tmp;
310 enum ieee80211_roc_type type;
311 u32 min_dur, max_dur;
313 lockdep_assert_held(&local->mtx);
315 if (WARN_ON(list_empty(&local->roc_list)))
318 roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
321 if (WARN_ON(roc->started))
324 min_dur = roc->duration;
325 max_dur = roc->duration;
328 list_for_each_entry(tmp, &local->roc_list, list) {
331 if (tmp->sdata != roc->sdata || tmp->chan != roc->chan)
333 max_dur = max(tmp->duration, max_dur);
334 min_dur = min(tmp->duration, min_dur);
335 type = max(tmp->type, type);
338 if (local->ops->remain_on_channel) {
339 int ret = drv_remain_on_channel(local, roc->sdata, roc->chan,
343 wiphy_warn(local->hw.wiphy,
344 "failed to start next HW ROC (%d)\n", ret);
346 * queue the work struct again to avoid recursion
347 * when multiple failures occur
349 list_for_each_entry(tmp, &local->roc_list, list) {
350 if (tmp->sdata != roc->sdata ||
351 tmp->chan != roc->chan)
356 ieee80211_queue_work(&local->hw, &local->hw_roc_done);
360 /* we'll notify about the start once the HW calls back */
361 list_for_each_entry(tmp, &local->roc_list, list) {
362 if (tmp->sdata != roc->sdata || tmp->chan != roc->chan)
367 /* If actually operating on the desired channel (with at least
368 * 20 MHz channel width) don't stop all the operations but still
369 * treat it as though the ROC operation started properly, so
370 * other ROC operations won't interfere with this one.
372 roc->on_channel = roc->chan == local->_oper_chandef.chan &&
373 local->_oper_chandef.width != NL80211_CHAN_WIDTH_5 &&
374 local->_oper_chandef.width != NL80211_CHAN_WIDTH_10;
377 ieee80211_recalc_idle(local);
379 if (!roc->on_channel) {
380 ieee80211_offchannel_stop_vifs(local);
382 local->tmp_channel = roc->chan;
383 ieee80211_hw_config(local, 0);
386 ieee80211_queue_delayed_work(&local->hw, &local->roc_work,
387 msecs_to_jiffies(min_dur));
389 /* tell userspace or send frame(s) */
390 list_for_each_entry(tmp, &local->roc_list, list) {
391 if (tmp->sdata != roc->sdata || tmp->chan != roc->chan)
394 tmp->on_channel = roc->on_channel;
395 ieee80211_handle_roc_started(tmp, jiffies);
400 void ieee80211_start_next_roc(struct ieee80211_local *local)
402 struct ieee80211_roc_work *roc;
404 lockdep_assert_held(&local->mtx);
406 if (list_empty(&local->roc_list)) {
407 ieee80211_run_deferred_scan(local);
411 /* defer roc if driver is not started (i.e. during reconfig) */
412 if (local->in_reconfig)
415 roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
418 if (WARN_ON_ONCE(roc->started))
421 if (local->ops->remain_on_channel) {
422 _ieee80211_start_next_roc(local);
425 ieee80211_queue_delayed_work(&local->hw, &local->roc_work,
426 round_jiffies_relative(HZ/2));
430 static void __ieee80211_roc_work(struct ieee80211_local *local)
432 struct ieee80211_roc_work *roc;
435 lockdep_assert_held(&local->mtx);
437 if (WARN_ON(local->ops->remain_on_channel))
440 roc = list_first_entry_or_null(&local->roc_list,
441 struct ieee80211_roc_work, list);
446 WARN_ON(local->use_chanctx);
447 _ieee80211_start_next_roc(local);
449 on_channel = roc->on_channel;
450 if (ieee80211_recalc_sw_work(local, jiffies))
453 /* careful - roc pointer became invalid during recalc */
456 ieee80211_flush_queues(local, NULL, false);
458 local->tmp_channel = NULL;
459 ieee80211_hw_config(local, 0);
461 ieee80211_offchannel_return(local);
464 ieee80211_recalc_idle(local);
465 ieee80211_start_next_roc(local);
469 static void ieee80211_roc_work(struct work_struct *work)
471 struct ieee80211_local *local =
472 container_of(work, struct ieee80211_local, roc_work.work);
474 mutex_lock(&local->mtx);
475 __ieee80211_roc_work(local);
476 mutex_unlock(&local->mtx);
479 static void ieee80211_hw_roc_done(struct work_struct *work)
481 struct ieee80211_local *local =
482 container_of(work, struct ieee80211_local, hw_roc_done);
484 mutex_lock(&local->mtx);
486 ieee80211_end_finished_rocs(local, jiffies);
488 /* if there's another roc, start it now */
489 ieee80211_start_next_roc(local);
491 mutex_unlock(&local->mtx);
494 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw)
496 struct ieee80211_local *local = hw_to_local(hw);
498 trace_api_remain_on_channel_expired(local);
500 ieee80211_queue_work(hw, &local->hw_roc_done);
502 EXPORT_SYMBOL_GPL(ieee80211_remain_on_channel_expired);
505 ieee80211_coalesce_hw_started_roc(struct ieee80211_local *local,
506 struct ieee80211_roc_work *new_roc,
507 struct ieee80211_roc_work *cur_roc)
509 unsigned long now = jiffies;
510 unsigned long remaining;
512 if (WARN_ON(!cur_roc->started))
515 /* if it was scheduled in the hardware, but not started yet,
516 * we can only combine if the older one had a longer duration
518 if (!cur_roc->hw_begun && new_roc->duration > cur_roc->duration)
521 remaining = cur_roc->start_time +
522 msecs_to_jiffies(cur_roc->duration) -
525 /* if it doesn't fit entirely, schedule a new one */
526 if (new_roc->duration > jiffies_to_msecs(remaining))
529 /* add just after the current one so we combine their finish later */
530 list_add(&new_roc->list, &cur_roc->list);
532 /* if the existing one has already begun then let this one also
533 * begin, otherwise they'll both be marked properly by the work
534 * struct that runs once the driver notifies us of the beginning
536 if (cur_roc->hw_begun) {
537 new_roc->hw_begun = true;
538 ieee80211_handle_roc_started(new_roc, now);
544 static int ieee80211_start_roc_work(struct ieee80211_local *local,
545 struct ieee80211_sub_if_data *sdata,
546 struct ieee80211_channel *channel,
547 unsigned int duration, u64 *cookie,
548 struct sk_buff *txskb,
549 enum ieee80211_roc_type type)
551 struct ieee80211_roc_work *roc, *tmp;
552 bool queued = false, combine_started = true;
555 lockdep_assert_held(&local->mtx);
557 if (local->use_chanctx && !local->ops->remain_on_channel)
560 roc = kzalloc(sizeof(*roc), GFP_KERNEL);
565 * If the duration is zero, then the driver
566 * wouldn't actually do anything. Set it to
569 * TODO: cancel the off-channel operation
570 * when we get the SKB's TX status and
571 * the wait time was zero before.
577 roc->duration = duration;
578 roc->req_duration = duration;
584 * cookie is either the roc cookie (for normal roc)
585 * or the SKB (for mgmt TX)
588 roc->cookie = ieee80211_mgmt_tx_cookie(local);
589 *cookie = roc->cookie;
591 roc->mgmt_tx_cookie = *cookie;
594 /* if there's no need to queue, handle it immediately */
595 if (list_empty(&local->roc_list) &&
596 !local->scanning && !ieee80211_is_radar_required(local)) {
597 /* if not HW assist, just queue & schedule work */
598 if (!local->ops->remain_on_channel) {
599 list_add_tail(&roc->list, &local->roc_list);
600 ieee80211_queue_delayed_work(&local->hw,
601 &local->roc_work, 0);
603 /* otherwise actually kick it off here
604 * (for error handling)
606 ret = drv_remain_on_channel(local, sdata, channel,
613 list_add_tail(&roc->list, &local->roc_list);
619 /* otherwise handle queueing */
621 list_for_each_entry(tmp, &local->roc_list, list) {
622 if (tmp->chan != channel || tmp->sdata != sdata)
626 * Extend this ROC if possible: If it hasn't started, add
627 * just after the new one to combine.
630 list_add(&roc->list, &tmp->list);
635 if (!combine_started)
638 if (!local->ops->remain_on_channel) {
639 /* If there's no hardware remain-on-channel, and
640 * doing so won't push us over the maximum r-o-c
641 * we allow, then we can just add the new one to
642 * the list and mark it as having started now.
643 * If it would push over the limit, don't try to
644 * combine with other started ones (that haven't
645 * been running as long) but potentially sort it
646 * with others that had the same fate.
648 unsigned long now = jiffies;
649 u32 elapsed = jiffies_to_msecs(now - tmp->start_time);
650 struct wiphy *wiphy = local->hw.wiphy;
651 u32 max_roc = wiphy->max_remain_on_channel_duration;
653 if (elapsed + roc->duration > max_roc) {
654 combine_started = false;
658 list_add(&roc->list, &tmp->list);
660 roc->on_channel = tmp->on_channel;
661 ieee80211_handle_roc_started(roc, now);
662 ieee80211_recalc_sw_work(local, now);
666 queued = ieee80211_coalesce_hw_started_roc(local, roc, tmp);
669 /* if it wasn't queued, perhaps it can be combined with
670 * another that also couldn't get combined previously,
671 * but no need to check for already started ones, since
674 combine_started = false;
678 list_add_tail(&roc->list, &local->roc_list);
683 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
684 struct ieee80211_channel *chan,
685 unsigned int duration, u64 *cookie)
687 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
688 struct ieee80211_local *local = sdata->local;
691 mutex_lock(&local->mtx);
692 ret = ieee80211_start_roc_work(local, sdata, chan,
693 duration, cookie, NULL,
694 IEEE80211_ROC_TYPE_NORMAL);
695 mutex_unlock(&local->mtx);
700 static int ieee80211_cancel_roc(struct ieee80211_local *local,
701 u64 cookie, bool mgmt_tx)
703 struct ieee80211_roc_work *roc, *tmp, *found = NULL;
709 mutex_lock(&local->mtx);
710 list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
711 if (!mgmt_tx && roc->cookie != cookie)
713 else if (mgmt_tx && roc->mgmt_tx_cookie != cookie)
721 mutex_unlock(&local->mtx);
725 if (!found->started) {
726 ieee80211_roc_notify_destroy(found);
730 if (local->ops->remain_on_channel) {
731 ret = drv_cancel_remain_on_channel(local);
732 if (WARN_ON_ONCE(ret)) {
733 mutex_unlock(&local->mtx);
738 * if multiple items were combined here then we really shouldn't
739 * cancel them all - we should wait for as much time as needed
740 * for the longest remaining one, and only then cancel ...
742 list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
747 ieee80211_roc_notify_destroy(roc);
750 /* that really must not happen - it was started */
753 ieee80211_start_next_roc(local);
755 /* go through work struct to return to the operating channel */
757 mod_delayed_work(local->workqueue, &local->roc_work, 0);
761 mutex_unlock(&local->mtx);
766 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
767 struct wireless_dev *wdev, u64 cookie)
769 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
770 struct ieee80211_local *local = sdata->local;
772 return ieee80211_cancel_roc(local, cookie, false);
775 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
776 struct cfg80211_mgmt_tx_params *params, u64 *cookie)
778 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
779 struct ieee80211_local *local = sdata->local;
781 struct sta_info *sta;
782 const struct ieee80211_mgmt *mgmt = (void *)params->buf;
783 bool need_offchan = false;
788 if (params->dont_wait_for_ack)
789 flags = IEEE80211_TX_CTL_NO_ACK;
791 flags = IEEE80211_TX_INTFL_NL80211_FRAME_TX |
792 IEEE80211_TX_CTL_REQ_TX_STATUS;
795 flags |= IEEE80211_TX_CTL_NO_CCK_RATE;
797 switch (sdata->vif.type) {
798 case NL80211_IFTYPE_ADHOC:
799 if (!sdata->vif.bss_conf.ibss_joined)
802 #ifdef CONFIG_MAC80211_MESH
803 case NL80211_IFTYPE_MESH_POINT:
804 if (ieee80211_vif_is_mesh(&sdata->vif) &&
805 !sdata->u.mesh.mesh_id_len)
809 case NL80211_IFTYPE_AP:
810 case NL80211_IFTYPE_AP_VLAN:
811 case NL80211_IFTYPE_P2P_GO:
812 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
813 !ieee80211_vif_is_mesh(&sdata->vif) &&
814 !rcu_access_pointer(sdata->bss->beacon))
816 if (!ieee80211_is_action(mgmt->frame_control) ||
817 mgmt->u.action.category == WLAN_CATEGORY_PUBLIC ||
818 mgmt->u.action.category == WLAN_CATEGORY_SELF_PROTECTED ||
819 mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT)
822 sta = sta_info_get(sdata, mgmt->da);
827 case NL80211_IFTYPE_STATION:
828 case NL80211_IFTYPE_P2P_CLIENT:
830 if (!sdata->u.mgd.associated ||
831 (params->offchan && params->wait &&
832 local->ops->remain_on_channel &&
833 memcmp(sdata->u.mgd.associated->bssid,
834 mgmt->bssid, ETH_ALEN)))
838 case NL80211_IFTYPE_P2P_DEVICE:
845 /* configurations requiring offchan cannot work if no channel has been
848 if (need_offchan && !params->chan)
851 mutex_lock(&local->mtx);
853 /* Check if the operating channel is the requested channel */
855 struct ieee80211_chanctx_conf *chanctx_conf;
858 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
861 need_offchan = params->chan &&
863 chanctx_conf->def.chan);
864 } else if (!params->chan) {
874 if (need_offchan && !params->offchan) {
879 skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
884 skb_reserve(skb, local->hw.extra_tx_headroom);
886 data = skb_put(skb, params->len);
887 memcpy(data, params->buf, params->len);
889 /* Update CSA counters */
890 if (sdata->vif.csa_active &&
891 (sdata->vif.type == NL80211_IFTYPE_AP ||
892 sdata->vif.type == NL80211_IFTYPE_MESH_POINT ||
893 sdata->vif.type == NL80211_IFTYPE_ADHOC) &&
894 params->n_csa_offsets) {
896 struct beacon_data *beacon = NULL;
900 if (sdata->vif.type == NL80211_IFTYPE_AP)
901 beacon = rcu_dereference(sdata->u.ap.beacon);
902 else if (sdata->vif.type == NL80211_IFTYPE_ADHOC)
903 beacon = rcu_dereference(sdata->u.ibss.presp);
904 else if (ieee80211_vif_is_mesh(&sdata->vif))
905 beacon = rcu_dereference(sdata->u.mesh.beacon);
908 for (i = 0; i < params->n_csa_offsets; i++)
909 data[params->csa_offsets[i]] =
910 beacon->csa_current_counter;
915 IEEE80211_SKB_CB(skb)->flags = flags;
917 skb->dev = sdata->dev;
919 if (!params->dont_wait_for_ack) {
920 /* make a copy to preserve the frame contents
921 * in case of encryption.
923 ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_KERNEL);
929 /* Assign a dummy non-zero cookie, it's not sent to
930 * userspace in this case but we rely on its value
931 * internally in the need_offchan case to distinguish
932 * mgmt-tx from remain-on-channel.
934 *cookie = 0xffffffff;
938 ieee80211_tx_skb(sdata, skb);
943 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_TX_OFFCHAN |
944 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
945 if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
946 IEEE80211_SKB_CB(skb)->hw_queue =
947 local->hw.offchannel_tx_hw_queue;
949 /* This will handle all kinds of coalescing and immediate TX */
950 ret = ieee80211_start_roc_work(local, sdata, params->chan,
951 params->wait, cookie, skb,
952 IEEE80211_ROC_TYPE_MGMT_TX);
954 ieee80211_free_txskb(&local->hw, skb);
956 mutex_unlock(&local->mtx);
960 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
961 struct wireless_dev *wdev, u64 cookie)
963 struct ieee80211_local *local = wiphy_priv(wiphy);
965 return ieee80211_cancel_roc(local, cookie, true);
968 void ieee80211_roc_setup(struct ieee80211_local *local)
970 INIT_WORK(&local->hw_roc_start, ieee80211_hw_roc_start);
971 INIT_WORK(&local->hw_roc_done, ieee80211_hw_roc_done);
972 INIT_DELAYED_WORK(&local->roc_work, ieee80211_roc_work);
973 INIT_LIST_HEAD(&local->roc_list);
976 void ieee80211_roc_purge(struct ieee80211_local *local,
977 struct ieee80211_sub_if_data *sdata)
979 struct ieee80211_roc_work *roc, *tmp;
980 bool work_to_do = false;
982 mutex_lock(&local->mtx);
983 list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
984 if (sdata && roc->sdata != sdata)
988 if (local->ops->remain_on_channel) {
989 /* can race, so ignore return value */
990 drv_cancel_remain_on_channel(local);
991 ieee80211_roc_notify_destroy(roc);
997 ieee80211_roc_notify_destroy(roc);
1001 __ieee80211_roc_work(local);
1002 mutex_unlock(&local->mtx);