~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/net/mac80211/pm.c

Version: ~ [ linux-5.2 ] ~ [ linux-5.1.16 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.57 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.132 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.184 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.184 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.69 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-3.9.11 ] ~ [ linux-3.8.13 ] ~ [ linux-3.7.10 ] ~ [ linux-3.6.11 ] ~ [ linux-3.5.7 ] ~ [ linux-3.4.113 ] ~ [ linux-3.3.8 ] ~ [ linux-3.2.102 ] ~ [ linux-3.1.10 ] ~ [ linux-3.0.101 ] ~ [ linux-2.6.39.4 ] ~ [ linux-2.6.38.8 ] ~ [ linux-2.6.37.6 ] ~ [ linux-2.6.36.4 ] ~ [ linux-2.6.35.14 ] ~ [ linux-2.6.34.15 ] ~ [ linux-2.6.33.20 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  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 /* return value indicates whether the driver should be further notified */
 10 static bool ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
 11 {
 12         switch (sdata->vif.type) {
 13         case NL80211_IFTYPE_STATION:
 14                 ieee80211_sta_quiesce(sdata);
 15                 return true;
 16         case NL80211_IFTYPE_ADHOC:
 17                 ieee80211_ibss_quiesce(sdata);
 18                 return true;
 19         case NL80211_IFTYPE_MESH_POINT:
 20                 ieee80211_mesh_quiesce(sdata);
 21                 return true;
 22         case NL80211_IFTYPE_AP_VLAN:
 23         case NL80211_IFTYPE_MONITOR:
 24                 /* don't tell driver about this */
 25                 return false;
 26         default:
 27                 return true;
 28         }
 29 }
 30 
 31 int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 32 {
 33         struct ieee80211_local *local = hw_to_local(hw);
 34         struct ieee80211_sub_if_data *sdata;
 35         struct sta_info *sta;
 36 
 37         if (!local->open_count)
 38                 goto suspend;
 39 
 40         ieee80211_scan_cancel(local);
 41 
 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);
 47                 }
 48                 mutex_unlock(&local->sta_mtx);
 49         }
 50 
 51         ieee80211_stop_queues_by_reason(hw,
 52                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 53 
 54         /* flush out all packets */
 55         synchronize_net();
 56 
 57         drv_flush(local, false);
 58 
 59         local->quiescing = true;
 60         /* make quiescing visible to timers everywhere */
 61         mb();
 62 
 63         flush_workqueue(local->workqueue);
 64 
 65         /* Don't try to run timers while suspended. */
 66         del_timer_sync(&local->sta_cleanup);
 67 
 68          /*
 69          * Note that this particular timer doesn't need to be
 70          * restarted at resume.
 71          */
 72         cancel_work_sync(&local->dynamic_ps_enable_work);
 73         del_timer_sync(&local->dynamic_ps_timer);
 74 
 75         local->wowlan = wowlan && local->open_count;
 76         if (local->wowlan) {
 77                 int err = drv_suspend(local, wowlan);
 78                 if (err < 0) {
 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);
 86                                 }
 87                                 mutex_unlock(&local->sta_mtx);
 88                         }
 89                         ieee80211_wake_queues_by_reason(hw,
 90                                         IEEE80211_QUEUE_STOP_REASON_SUSPEND);
 91                         return err;
 92                 } else if (err > 0) {
 93                         WARN_ON(err != 1);
 94                         local->wowlan = false;
 95                 } else {
 96                         list_for_each_entry(sdata, &local->interfaces, list) {
 97                                 cancel_work_sync(&sdata->work);
 98                                 ieee80211_quiesce(sdata);
 99                         }
100                         goto suspend;
101                 }
102         }
103 
104         /* disable keys */
105         list_for_each_entry(sdata, &local->interfaces, list)
106                 ieee80211_disable_keys(sdata);
107 
108         /* tear down aggregation sessions and remove STAs */
109         mutex_lock(&local->sta_mtx);
110         list_for_each_entry(sta, &local->sta_list, list) {
111                 if (sta->uploaded) {
112                         enum ieee80211_sta_state state;
113 
114                         state = sta->sta_state;
115                         for (; state > IEEE80211_STA_NOTEXIST; state--)
116                                 WARN_ON(drv_sta_state(local, sta->sdata, sta,
117                                                       state, state - 1));
118                 }
119 
120                 mesh_plink_quiesce(sta);
121         }
122         mutex_unlock(&local->sta_mtx);
123 
124         /* remove all interfaces */
125         list_for_each_entry(sdata, &local->interfaces, list) {
126                 cancel_work_sync(&sdata->work);
127 
128                 if (!ieee80211_quiesce(sdata))
129                         continue;
130 
131                 if (!ieee80211_sdata_running(sdata))
132                         continue;
133 
134                 /* disable beaconing */
135                 ieee80211_bss_info_change_notify(sdata,
136                         BSS_CHANGED_BEACON_ENABLED);
137 
138                 drv_remove_interface(local, sdata);
139         }
140 
141         sdata = rtnl_dereference(local->monitor_sdata);
142         if (sdata)
143                 drv_remove_interface(local, sdata);
144 
145         /* stop hardware - this must stop RX */
146         if (local->open_count)
147                 ieee80211_stop_device(local);
148 
149  suspend:
150         local->suspended = true;
151         /* need suspended to be visible before quiescing is false */
152         barrier();
153         local->quiescing = false;
154 
155         return 0;
156 }
157 
158 /*
159  * __ieee80211_resume() is a static inline which just calls
160  * ieee80211_reconfig(), which is also needed for hardware
161  * hang/firmware failure/etc. recovery.
162  */
163 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp