[deliverable/linux.git] / net / mac80211 / pm.c

#include <net/mac80211.h>
#include <net/rtnetlink.h>

#include "ieee80211_i.h"
#include "mesh.h"
#include "driver-ops.h"
#include "led.h"

int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;

	if (!local->open_count)
		goto suspend;

	ieee80211_scan_cancel(local);

	ieee80211_dfs_cac_cancel(local);

	ieee80211_roc_purge(local, NULL);

	ieee80211_del_virtual_monitor(local);

	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
		mutex_lock(&local->sta_mtx);
		list_for_each_entry(sta, &local->sta_list, list) {
			set_sta_flag(sta, WLAN_STA_BLOCK_BA);
			ieee80211_sta_tear_down_BA_sessions(
					sta, AGG_STOP_LOCAL_REQUEST);
		}
		mutex_unlock(&local->sta_mtx);
	}

	ieee80211_stop_queues_by_reason(hw,
					IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
					false);

	/* flush out all packets */
	synchronize_net();

	ieee80211_flush_queues(local, NULL, true);

	local->quiescing = true;
	/* make quiescing visible to timers everywhere */
	mb();

	flush_workqueue(local->workqueue);

	/* Don't try to run timers while suspended. */
	del_timer_sync(&local->sta_cleanup);

	 /*
	 * Note that this particular timer doesn't need to be
	 * restarted at resume.
	 */
	cancel_work_sync(&local->dynamic_ps_enable_work);
	del_timer_sync(&local->dynamic_ps_timer);

	local->wowlan = wowlan;
	if (local->wowlan) {
		int err;

		/* Drivers don't expect to suspend while some operations like
		 * authenticating or associating are in progress. It doesn't
		 * make sense anyway to accept that, since the authentication
		 * or association would never finish since the driver can't do
		 * that on its own.
		 * Thus, clean up in-progress auth/assoc first.
		 */
		list_for_each_entry(sdata, &local->interfaces, list) {
			if (!ieee80211_sdata_running(sdata))
				continue;
			if (sdata->vif.type != NL80211_IFTYPE_STATION)
				continue;
			ieee80211_mgd_quiesce(sdata);
		}

		err = drv_suspend(local, wowlan);
		if (err < 0) {
			local->quiescing = false;
			local->wowlan = false;
			if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
				mutex_lock(&local->sta_mtx);
				list_for_each_entry(sta,
						    &local->sta_list, list) {
					clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
				}
				mutex_unlock(&local->sta_mtx);
			}
			ieee80211_wake_queues_by_reason(hw,
					IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
					false);
			return err;
		} else if (err > 0) {
			WARN_ON(err != 1);
			/* cfg80211 will call back into mac80211 to disconnect
			 * all interfaces, allow that to proceed properly
			 */
			ieee80211_wake_queues_by_reason(hw,
					IEEE80211_MAX_QUEUE_MAP,
					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
					false);
			return err;
		} else {
			goto suspend;
		}
	}

	/* remove all interfaces that were created in the driver */
	list_for_each_entry(sdata, &local->interfaces, list) {
		if (!ieee80211_sdata_running(sdata))
			continue;
		switch (sdata->vif.type) {
		case NL80211_IFTYPE_AP_VLAN:
		case NL80211_IFTYPE_MONITOR:
			continue;
		case NL80211_IFTYPE_STATION:
			ieee80211_mgd_quiesce(sdata);
			break;
		case NL80211_IFTYPE_WDS:
			/* tear down aggregation sessions and remove STAs */
			mutex_lock(&local->sta_mtx);
			sta = sdata->u.wds.sta;
			if (sta && sta->uploaded) {
				enum ieee80211_sta_state state;

				state = sta->sta_state;
				for (; state > IEEE80211_STA_NOTEXIST; state--)
					WARN_ON(drv_sta_state(local, sta->sdata,
							      sta, state,
							      state - 1));
			}
			mutex_unlock(&local->sta_mtx);
			break;
		default:
			break;
		}

		drv_remove_interface(local, sdata);
	}

	/*
	 * We disconnected on all interfaces before suspend, all channel
	 * contexts should be released.
	 */
	WARN_ON(!list_empty(&local->chanctx_list));

	/* stop hardware - this must stop RX */
	if (local->open_count)
		ieee80211_stop_device(local);

 suspend:
	local->suspended = true;
	/* need suspended to be visible before quiescing is false */
	barrier();
	local->quiescing = false;

	return 0;
}

/*
 * __ieee80211_resume() is a static inline which just calls
 * ieee80211_reconfig(), which is also needed for hardware
 * hang/firmware failure/etc. recovery.
 */

void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
				    struct cfg80211_wowlan_wakeup *wakeup,
				    gfp_t gfp)
{
	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);

	cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
}
EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
Commit	Line	Data
	1	#include <net/mac80211.h>
	2	#include <net/rtnetlink.h>
	3
	4	#include "ieee80211_i.h"
	5	#include "mesh.h"
	6	#include "driver-ops.h"
	7	#include "led.h"
	8
	9	int __ieee80211_suspend(struct ieee80211_hw hw, struct cfg80211_wowlan wowlan)
	10	{
	11	struct ieee80211_local *local = hw_to_local(hw);
	12	struct ieee80211_sub_if_data *sdata;
	13	struct sta_info *sta;
	14
	15	if (!local->open_count)
	16	goto suspend;
	17
	18	ieee80211_scan_cancel(local);
	19
	20	ieee80211_dfs_cac_cancel(local);
	21
	22	ieee80211_roc_purge(local, NULL);
	23
	24	ieee80211_del_virtual_monitor(local);
	25
	26	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
	27	mutex_lock(&local->sta_mtx);
	28	list_for_each_entry(sta, &local->sta_list, list) {
	29	set_sta_flag(sta, WLAN_STA_BLOCK_BA);
	30	ieee80211_sta_tear_down_BA_sessions(
	31	sta, AGG_STOP_LOCAL_REQUEST);
	32	}
	33	mutex_unlock(&local->sta_mtx);
	34	}
	35
	36	ieee80211_stop_queues_by_reason(hw,
	37	IEEE80211_MAX_QUEUE_MAP,
	38	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
	39	false);
	40
	41	/* flush out all packets */
	42	synchronize_net();
	43
	44	ieee80211_flush_queues(local, NULL, true);
	45
	46	local->quiescing = true;
	47	/* make quiescing visible to timers everywhere */
	48	mb();
	49
	50	flush_workqueue(local->workqueue);
	51
	52	/* Don't try to run timers while suspended. */
	53	del_timer_sync(&local->sta_cleanup);
	54
	55	/*
	56	* Note that this particular timer doesn't need to be
	57	* restarted at resume.
	58	*/
	59	cancel_work_sync(&local->dynamic_ps_enable_work);
	60	del_timer_sync(&local->dynamic_ps_timer);
	61
	62	local->wowlan = wowlan;
	63	if (local->wowlan) {
	64	int err;
	65
	66	/* Drivers don't expect to suspend while some operations like
	67	* authenticating or associating are in progress. It doesn't
	68	* make sense anyway to accept that, since the authentication
	69	* or association would never finish since the driver can't do
	70	* that on its own.
	71	* Thus, clean up in-progress auth/assoc first.
	72	*/
	73	list_for_each_entry(sdata, &local->interfaces, list) {
	74	if (!ieee80211_sdata_running(sdata))
	75	continue;
	76	if (sdata->vif.type != NL80211_IFTYPE_STATION)
	77	continue;
	78	ieee80211_mgd_quiesce(sdata);
	79	}
	80
	81	err = drv_suspend(local, wowlan);
	82	if (err < 0) {
	83	local->quiescing = false;
	84	local->wowlan = false;
	85	if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
	86	mutex_lock(&local->sta_mtx);
	87	list_for_each_entry(sta,
	88	&local->sta_list, list) {
	89	clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
	90	}
	91	mutex_unlock(&local->sta_mtx);
	92	}
	93	ieee80211_wake_queues_by_reason(hw,
	94	IEEE80211_MAX_QUEUE_MAP,
	95	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
	96	false);
	97	return err;
	98	} else if (err > 0) {
	99	WARN_ON(err != 1);
	100	/* cfg80211 will call back into mac80211 to disconnect
	101	* all interfaces, allow that to proceed properly
	102	*/
	103	ieee80211_wake_queues_by_reason(hw,
	104	IEEE80211_MAX_QUEUE_MAP,
	105	IEEE80211_QUEUE_STOP_REASON_SUSPEND,
	106	false);
	107	return err;
	108	} else {
	109	goto suspend;
	110	}
	111	}
	112
	113	/* remove all interfaces that were created in the driver */
	114	list_for_each_entry(sdata, &local->interfaces, list) {
	115	if (!ieee80211_sdata_running(sdata))
	116	continue;
	117	switch (sdata->vif.type) {
	118	case NL80211_IFTYPE_AP_VLAN:
	119	case NL80211_IFTYPE_MONITOR:
	120	continue;
	121	case NL80211_IFTYPE_STATION:
	122	ieee80211_mgd_quiesce(sdata);
	123	break;
	124	case NL80211_IFTYPE_WDS:
	125	/* tear down aggregation sessions and remove STAs */
	126	mutex_lock(&local->sta_mtx);
	127	sta = sdata->u.wds.sta;
	128	if (sta && sta->uploaded) {
	129	enum ieee80211_sta_state state;
	130
	131	state = sta->sta_state;
	132	for (; state > IEEE80211_STA_NOTEXIST; state--)
	133	WARN_ON(drv_sta_state(local, sta->sdata,
	134	sta, state,
	135	state - 1));
	136	}
	137	mutex_unlock(&local->sta_mtx);
	138	break;
	139	default:
	140	break;
	141	}
	142
	143	drv_remove_interface(local, sdata);
	144	}
	145
	146	/*
	147	* We disconnected on all interfaces before suspend, all channel
	148	* contexts should be released.
	149	*/
	150	WARN_ON(!list_empty(&local->chanctx_list));
	151
	152	/* stop hardware - this must stop RX */
	153	if (local->open_count)
	154	ieee80211_stop_device(local);
	155
	156	suspend:
	157	local->suspended = true;
	158	/* need suspended to be visible before quiescing is false */
	159	barrier();
	160	local->quiescing = false;
	161
	162	return 0;
	163	}
	164
	165	/*
	166	* __ieee80211_resume() is a static inline which just calls
	167	* ieee80211_reconfig(), which is also needed for hardware
	168	* hang/firmware failure/etc. recovery.
	169	*/
	170
	171	void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif,
	172	struct cfg80211_wowlan_wakeup *wakeup,
	173	gfp_t gfp)
	174	{
	175	struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
	176
	177	cfg80211_report_wowlan_wakeup(&sdata->wdev, wakeup, gfp);
	178	}
	179	EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);