net/mac80211/offchannel.c

27 	struct ieee80211_local *local = sdata->local;
31 	/* FIXME: what to do when local->pspolling is true? */
33 	del_timer_sync(&local->dynamic_ps_timer);
37 	wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work);
39 	if (local->hw.conf.flags & IEEE80211_CONF_PS) {
41 		local->hw.conf.flags &= ~IEEE80211_CONF_PS;
42 		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
46 	    !ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK))
57 		ieee80211_send_nullfunc(local, sdata, true);
63 	struct ieee80211_local *local = sdata->local;
65 	if (!local->ps_sdata)
66 		ieee80211_send_nullfunc(local, sdata, false);
67 	else if (local->hw.conf.dynamic_ps_timeout > 0) {
74 		ieee80211_send_nullfunc(local, sdata, false);
75 		mod_timer(&local->dynamic_ps_timer, jiffies +
76 			  msecs_to_jiffies(local->hw.conf.dynamic_ps_timeout));
83 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local)
87 	lockdep_assert_wiphy(local->hw.wiphy);
89 	if (WARN_ON(!local->emulate_chanctx))
101 	ieee80211_stop_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
104 	ieee80211_flush_queues(local, NULL, false);
106 	list_for_each_entry(sdata, &local->interfaces, list) {
133 void ieee80211_offchannel_return(struct ieee80211_local *local)
137 	lockdep_assert_wiphy(local->hw.wiphy);
139 	if (WARN_ON(!local->emulate_chanctx))
142 	list_for_each_entry(sdata, &local->interfaces, list) {
166 	ieee80211_wake_queues_by_reason(&local->hw, IEEE80211_MAX_QUEUE_MAP,
178 		ieee80211_free_txskb(&roc->sdata->local->hw, roc->frame);
194 static unsigned long ieee80211_end_finished_rocs(struct ieee80211_local *local,
200 	lockdep_assert_wiphy(local->hw.wiphy);
202 	list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
225 static bool ieee80211_recalc_sw_work(struct ieee80211_local *local,
228 	long dur = ieee80211_end_finished_rocs(local, now);
233 	wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, dur);
263 	struct ieee80211_local *local =
267 	lockdep_assert_wiphy(local->hw.wiphy);
269 	list_for_each_entry(roc, &local->roc_list, list) {
274 		ieee80211_handle_roc_started(roc, local->hw_roc_start_time);
280 	struct ieee80211_local *local = hw_to_local(hw);
282 	local->hw_roc_start_time = jiffies;
284 	trace_api_ready_on_channel(local);
286 	wiphy_work_queue(hw->wiphy, &local->hw_roc_start);
290 static void _ieee80211_start_next_roc(struct ieee80211_local *local)
296 	lockdep_assert_wiphy(local->hw.wiphy);
298 	if (WARN_ON(list_empty(&local->roc_list)))
301 	roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
311 	list_for_each_entry(tmp, &local->roc_list, list) {
321 	if (local->ops->remain_on_channel) {
322 		int ret = drv_remain_on_channel(local, roc->sdata, roc->chan,
326 			wiphy_warn(local->hw.wiphy,
332 			list_for_each_entry(tmp, &local->roc_list, list) {
339 			wiphy_work_queue(local->hw.wiphy, &local->hw_roc_done);
344 		list_for_each_entry(tmp, &local->roc_list, list) {
358 		roc->on_channel = roc->chan == local->hw.conf.chandef.chan &&
359 				  local->hw.conf.chandef.width != NL80211_CHAN_WIDTH_5 &&
360 				  local->hw.conf.chandef.width != NL80211_CHAN_WIDTH_10;
363 		ieee80211_recalc_idle(local);
366 			ieee80211_offchannel_stop_vifs(local);
368 			local->tmp_channel = roc->chan;
369 			ieee80211_hw_conf_chan(local);
372 		wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work,
376 		list_for_each_entry(tmp, &local->roc_list, list) {
386 void ieee80211_start_next_roc(struct ieee80211_local *local)
390 	lockdep_assert_wiphy(local->hw.wiphy);
392 	if (list_empty(&local->roc_list)) {
393 		ieee80211_run_deferred_scan(local);
398 	if (local->in_reconfig)
401 	roc = list_first_entry(&local->roc_list, struct ieee80211_roc_work,
407 	if (local->ops->remain_on_channel) {
408 		_ieee80211_start_next_roc(local);
411 		wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work,
416 static void __ieee80211_roc_work(struct ieee80211_local *local)
421 	lockdep_assert_wiphy(local->hw.wiphy);
423 	if (WARN_ON(local->ops->remain_on_channel))
426 	roc = list_first_entry_or_null(&local->roc_list,
432 		WARN_ON(!local->emulate_chanctx);
433 		_ieee80211_start_next_roc(local);
436 		if (ieee80211_recalc_sw_work(local, jiffies))
442 			ieee80211_flush_queues(local, NULL, false);
444 			local->tmp_channel = NULL;
445 			ieee80211_hw_conf_chan(local);
447 			ieee80211_offchannel_return(local);
450 		ieee80211_recalc_idle(local);
451 		ieee80211_start_next_roc(local);
457 	struct ieee80211_local *local =
460 	lockdep_assert_wiphy(local->hw.wiphy);
462 	__ieee80211_roc_work(local);
467 	struct ieee80211_local *local =
470 	lockdep_assert_wiphy(local->hw.wiphy);
472 	ieee80211_end_finished_rocs(local, jiffies);
475 	ieee80211_start_next_roc(local);
480 	struct ieee80211_local *local = hw_to_local(hw);
482 	trace_api_remain_on_channel_expired(local);
484 	wiphy_work_queue(hw->wiphy, &local->hw_roc_done);
489 ieee80211_coalesce_hw_started_roc(struct ieee80211_local *local,
528 static int ieee80211_start_roc_work(struct ieee80211_local *local,
539 	lockdep_assert_wiphy(local->hw.wiphy);
545 	if (!local->emulate_chanctx && !local->ops->remain_on_channel)
576 		roc->cookie = ieee80211_mgmt_tx_cookie(local);
583 	if (list_empty(&local->roc_list) &&
584 	    !local->scanning && !ieee80211_is_radar_required(local)) {
586 		if (!local->ops->remain_on_channel) {
587 			list_add_tail(&roc->list, &local->roc_list);
588 			wiphy_delayed_work_queue(local->hw.wiphy,
589 						 &local->roc_work, 0);
594 			ret = drv_remain_on_channel(local, sdata, channel,
601 			list_add_tail(&roc->list, &local->roc_list);
609 	list_for_each_entry(tmp, &local->roc_list, list) {
626 		if (!local->ops->remain_on_channel) {
638 			struct wiphy *wiphy = local->hw.wiphy;
650 			ieee80211_recalc_sw_work(local, now);
654 		queued = ieee80211_coalesce_hw_started_roc(local, roc, tmp);
666 		list_add_tail(&roc->list, &local->roc_list);
676 	struct ieee80211_local *local = sdata->local;
678 	lockdep_assert_wiphy(local->hw.wiphy);
680 	return ieee80211_start_roc_work(local, sdata, chan,
685 static int ieee80211_cancel_roc(struct ieee80211_local *local,
691 	lockdep_assert_wiphy(local->hw.wiphy);
696 	wiphy_work_flush(local->hw.wiphy, &local->hw_roc_start);
698 	list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
717 	if (local->ops->remain_on_channel) {
718 		ret = drv_cancel_remain_on_channel(local, roc->sdata);
738 		wiphy_work_cancel(local->hw.wiphy, &local->hw_roc_done);
745 		list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
756 		ieee80211_start_next_roc(local);
760 		wiphy_delayed_work_queue(local->hw.wiphy, &local->roc_work, 0);
772 	struct ieee80211_local *local = sdata->local;
774 	return ieee80211_cancel_roc(local, cookie, false);
781 	struct ieee80211_local *local = sdata->local;
792 	lockdep_assert_wiphy(local->hw.wiphy);
851 		     local->ops->remain_on_channel &&
921 	skb = dev_alloc_skb(local->hw.extra_tx_headroom + params->len);
926 	skb_reserve(skb, local->hw.extra_tx_headroom);
964 		ret = ieee80211_attach_ack_skb(local, skb, cookie, GFP_KERNEL);
986 	if (ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
988 			local->hw.offchannel_tx_hw_queue;
991 	ret = ieee80211_start_roc_work(local, sdata, params->chan,
995 		ieee80211_free_txskb(&local->hw, skb);
1003 	struct ieee80211_local *local = wiphy_priv(wiphy);
1005 	return ieee80211_cancel_roc(local, cookie, true);
1008 void ieee80211_roc_setup(struct ieee80211_local *local)
1010 	wiphy_work_init(&local->hw_roc_start, ieee80211_hw_roc_start);
1011 	wiphy_work_init(&local->hw_roc_done, ieee80211_hw_roc_done);
1012 	wiphy_delayed_work_init(&local->roc_work, ieee80211_roc_work);
1013 	INIT_LIST_HEAD(&local->roc_list);
1016 void ieee80211_roc_purge(struct ieee80211_local *local,
1022 	lockdep_assert_wiphy(local->hw.wiphy);
1024 	list_for_each_entry_safe(roc, tmp, &local->roc_list, list) {
1029 			if (local->ops->remain_on_channel) {
1031 				drv_cancel_remain_on_channel(local, roc->sdata);
1042 		__ieee80211_roc_work(local);