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
9int __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 (hw->flags & IEEE80211_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 (hw->flags & IEEE80211_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
171void 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}
179EXPORT_SYMBOL(ieee80211_report_wowlan_wakeup);
180