1 #include <net/mac80211.h>
2 #include <net/rtnetlink.h>
4 #include "ieee80211_i.h"
6 #include "driver-ops.h"
9 /* return value indicates whether the driver should be further notified */
10 static bool ieee80211_quiesce(struct ieee80211_sub_if_data
*sdata
)
12 switch (sdata
->vif
.type
) {
13 case NL80211_IFTYPE_STATION
:
14 ieee80211_sta_quiesce(sdata
);
16 case NL80211_IFTYPE_ADHOC
:
17 ieee80211_ibss_quiesce(sdata
);
19 case NL80211_IFTYPE_MESH_POINT
:
20 ieee80211_mesh_quiesce(sdata
);
22 case NL80211_IFTYPE_AP_VLAN
:
23 case NL80211_IFTYPE_MONITOR
:
24 /* don't tell driver about this */
31 int __ieee80211_suspend(struct ieee80211_hw
*hw
, struct cfg80211_wowlan
*wowlan
)
33 struct ieee80211_local
*local
= hw_to_local(hw
);
34 struct ieee80211_sub_if_data
*sdata
;
37 if (!local
->open_count
)
40 ieee80211_scan_cancel(local
);
42 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
43 mutex_lock(&local
->sta_mtx
);
44 list_for_each_entry(sta
, &local
->sta_list
, list
) {
45 set_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
46 ieee80211_sta_tear_down_BA_sessions(sta
, true);
48 mutex_unlock(&local
->sta_mtx
);
51 ieee80211_stop_queues_by_reason(hw
,
52 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
54 /* flush out all packets */
57 drv_flush(local
, false);
59 local
->quiescing
= true;
60 /* make quiescing visible to timers everywhere */
63 flush_workqueue(local
->workqueue
);
65 /* Don't try to run timers while suspended. */
66 del_timer_sync(&local
->sta_cleanup
);
69 * Note that this particular timer doesn't need to be
70 * restarted at resume.
72 cancel_work_sync(&local
->dynamic_ps_enable_work
);
73 del_timer_sync(&local
->dynamic_ps_timer
);
75 local
->wowlan
= wowlan
&& local
->open_count
;
77 int err
= drv_suspend(local
, wowlan
);
79 local
->quiescing
= false;
80 local
->wowlan
= false;
81 if (hw
->flags
& IEEE80211_HW_AMPDU_AGGREGATION
) {
82 mutex_lock(&local
->sta_mtx
);
83 list_for_each_entry(sta
,
84 &local
->sta_list
, list
) {
85 clear_sta_flag(sta
, WLAN_STA_BLOCK_BA
);
87 mutex_unlock(&local
->sta_mtx
);
89 ieee80211_wake_queues_by_reason(hw
,
90 IEEE80211_QUEUE_STOP_REASON_SUSPEND
);
94 local
->wowlan
= false;
96 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
97 cancel_work_sync(&sdata
->work
);
98 ieee80211_quiesce(sdata
);
105 list_for_each_entry(sdata
, &local
->interfaces
, list
)
106 ieee80211_disable_keys(sdata
);
108 /* tear down aggregation sessions and remove STAs */
109 mutex_lock(&local
->sta_mtx
);
110 list_for_each_entry(sta
, &local
->sta_list
, list
) {
112 enum ieee80211_sta_state state
;
114 state
= sta
->sta_state
;
115 for (; state
> IEEE80211_STA_NOTEXIST
; state
--)
116 WARN_ON(drv_sta_state(local
, sta
->sdata
, sta
,
120 mesh_plink_quiesce(sta
);
122 mutex_unlock(&local
->sta_mtx
);
124 /* remove all interfaces */
125 list_for_each_entry(sdata
, &local
->interfaces
, list
) {
126 cancel_work_sync(&sdata
->work
);
128 if (!ieee80211_quiesce(sdata
))
131 if (!ieee80211_sdata_running(sdata
))
134 /* disable beaconing */
135 ieee80211_bss_info_change_notify(sdata
,
136 BSS_CHANGED_BEACON_ENABLED
);
138 /* the interface is leaving the channel and is removed */
139 ieee80211_vif_release_channel(sdata
);
140 drv_remove_interface(local
, sdata
);
143 sdata
= rtnl_dereference(local
->monitor_sdata
);
145 drv_remove_interface(local
, sdata
);
147 /* stop hardware - this must stop RX */
148 if (local
->open_count
)
149 ieee80211_stop_device(local
);
152 local
->suspended
= true;
153 /* need suspended to be visible before quiescing is false */
155 local
->quiescing
= false;
161 * __ieee80211_resume() is a static inline which just calls
162 * ieee80211_reconfig(), which is also needed for hardware
163 * hang/firmware failure/etc. recovery.