pm.c 3.43 KB
Newer Older
1 2 3 4
#include <net/mac80211.h>
#include <net/rtnetlink.h>

#include "ieee80211_i.h"
5
#include "mesh.h"
6
#include "driver-ops.h"
7 8
#include "led.h"

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
/* return value indicates whether the driver should be further notified */
static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
{
	switch (sdata->vif.type) {
	case NL80211_IFTYPE_STATION:
		ieee80211_sta_quiesce(sdata);
		return true;
	case NL80211_IFTYPE_ADHOC:
		ieee80211_ibss_quiesce(sdata);
		return true;
	case NL80211_IFTYPE_MESH_POINT:
		ieee80211_mesh_quiesce(sdata);
		return true;
	case NL80211_IFTYPE_AP_VLAN:
	case NL80211_IFTYPE_MONITOR:
		/* don't tell driver about this */
		return false;
	default:
		return true;
	}
}

31
int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
32 33 34 35 36
{
	struct ieee80211_local *local = hw_to_local(hw);
	struct ieee80211_sub_if_data *sdata;
	struct sta_info *sta;

37 38 39
	if (!local->open_count)
		goto suspend;

40
	ieee80211_scan_cancel(local);
41

42 43 44
	if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
		mutex_lock(&local->sta_mtx);
		list_for_each_entry(sta, &local->sta_list, list) {
45
			set_sta_flag(sta, WLAN_STA_BLOCK_BA);
46 47 48 49 50
			ieee80211_sta_tear_down_BA_sessions(sta, true);
		}
		mutex_unlock(&local->sta_mtx);
	}

51 52 53
	ieee80211_stop_queues_by_reason(hw,
			IEEE80211_QUEUE_STOP_REASON_SUSPEND);

54 55 56
	/* flush out all packets */
	synchronize_net();

57 58
	drv_flush(local, false);

59 60 61 62
	local->quiescing = true;
	/* make quiescing visible to timers everywhere */
	mb();

63
	flush_workqueue(local->workqueue);
64

65 66 67 68 69 70 71 72 73 74
	/* 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);

75 76 77
	local->wowlan = wowlan && local->open_count;
	if (local->wowlan) {
		int err = drv_suspend(local, wowlan);
78
		if (err < 0) {
79 80
			local->quiescing = false;
			return err;
81 82 83 84 85 86 87 88 89
		} else if (err > 0) {
			WARN_ON(err != 1);
			local->wowlan = false;
		} else {
			list_for_each_entry(sdata, &local->interfaces, list) {
				cancel_work_sync(&sdata->work);
				ieee80211_quiesce(sdata);
			}
			goto suspend;
90 91 92
		}
	}

93 94 95 96
	/* disable keys */
	list_for_each_entry(sdata, &local->interfaces, list)
		ieee80211_disable_keys(sdata);

97 98 99
	/* tear down aggregation sessions and remove STAs */
	mutex_lock(&local->sta_mtx);
	list_for_each_entry(sta, &local->sta_list, list) {
100
		if (sta->uploaded) {
101
			sdata = sta->sdata;
102 103 104 105 106
			if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
				sdata = container_of(sdata->bss,
					     struct ieee80211_sub_if_data,
					     u.ap);

107
			drv_sta_remove(local, sdata, &sta->sta);
108
		}
109 110

		mesh_plink_quiesce(sta);
111
	}
112
	mutex_unlock(&local->sta_mtx);
113 114 115

	/* remove all interfaces */
	list_for_each_entry(sdata, &local->interfaces, list) {
116 117
		cancel_work_sync(&sdata->work);

118
		if (!ieee80211_quiesce(sdata))
119
			continue;
120

121
		if (!ieee80211_sdata_running(sdata))
122
			continue;
123

124 125 126 127
		/* disable beaconing */
		ieee80211_bss_info_change_notify(sdata,
			BSS_CHANGED_BEACON_ENABLED);

128
		drv_remove_interface(local, sdata);
129
	}
130

Johannes Berg's avatar
Johannes Berg committed
131
	/* stop hardware - this must stop RX */
132 133
	if (local->open_count)
		ieee80211_stop_device(local);
Johannes Berg's avatar
Johannes Berg committed
134

135
 suspend:
136
	local->suspended = true;
Johannes Berg's avatar
Johannes Berg committed
137 138
	/* need suspended to be visible before quiescing is false */
	barrier();
139 140
	local->quiescing = false;

141 142 143
	return 0;
}

144 145 146 147 148
/*
 * __ieee80211_resume() is a static inline which just calls
 * ieee80211_reconfig(), which is also needed for hardware
 * hang/firmware failure/etc. recovery.
 */