![Johannes Berg](/assets/img/avatar_default.png)
The initiator/tx doesn't really identify why an aggregation session is stopped, give a reason for stopping that more clearly identifies what's going on. This will help tell the driver clearly what is expected of it. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
231 lines
5.6 KiB
C
231 lines
5.6 KiB
C
#include <net/mac80211.h>
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#include <net/rtnetlink.h>
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#include "ieee80211_i.h"
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#include "mesh.h"
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#include "driver-ops.h"
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#include "led.h"
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/* return value indicates whether the driver should be further notified */
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static void ieee80211_quiesce(struct ieee80211_sub_if_data *sdata)
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{
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_STATION:
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ieee80211_sta_quiesce(sdata);
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break;
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case NL80211_IFTYPE_ADHOC:
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ieee80211_ibss_quiesce(sdata);
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break;
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case NL80211_IFTYPE_MESH_POINT:
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ieee80211_mesh_quiesce(sdata);
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break;
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default:
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break;
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}
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cancel_work_sync(&sdata->work);
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}
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int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
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{
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struct ieee80211_local *local = hw_to_local(hw);
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struct ieee80211_sub_if_data *sdata;
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struct sta_info *sta;
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struct ieee80211_chanctx *ctx;
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if (!local->open_count)
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goto suspend;
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ieee80211_scan_cancel(local);
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if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta, &local->sta_list, list) {
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set_sta_flag(sta, WLAN_STA_BLOCK_BA);
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ieee80211_sta_tear_down_BA_sessions(
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sta, AGG_STOP_LOCAL_REQUEST);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_stop_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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/* flush out all packets */
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synchronize_net();
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drv_flush(local, false);
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local->quiescing = true;
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/* make quiescing visible to timers everywhere */
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mb();
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flush_workqueue(local->workqueue);
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/* Don't try to run timers while suspended. */
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del_timer_sync(&local->sta_cleanup);
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/*
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* Note that this particular timer doesn't need to be
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* restarted at resume.
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*/
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cancel_work_sync(&local->dynamic_ps_enable_work);
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del_timer_sync(&local->dynamic_ps_timer);
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local->wowlan = wowlan && local->open_count;
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if (local->wowlan) {
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int err = drv_suspend(local, wowlan);
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if (err < 0) {
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local->quiescing = false;
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local->wowlan = false;
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if (hw->flags & IEEE80211_HW_AMPDU_AGGREGATION) {
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta,
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&local->sta_list, list) {
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clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
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}
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mutex_unlock(&local->sta_mtx);
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}
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ieee80211_wake_queues_by_reason(hw,
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IEEE80211_QUEUE_STOP_REASON_SUSPEND);
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return err;
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} else if (err > 0) {
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WARN_ON(err != 1);
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local->wowlan = false;
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} else {
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list_for_each_entry(sdata, &local->interfaces, list)
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if (ieee80211_sdata_running(sdata))
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ieee80211_quiesce(sdata);
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goto suspend;
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}
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}
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/* disable keys */
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list_for_each_entry(sdata, &local->interfaces, list)
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ieee80211_disable_keys(sdata);
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/* tear down aggregation sessions and remove STAs */
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mutex_lock(&local->sta_mtx);
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list_for_each_entry(sta, &local->sta_list, list) {
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if (sta->uploaded) {
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enum ieee80211_sta_state state;
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state = sta->sta_state;
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for (; state > IEEE80211_STA_NOTEXIST; state--)
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WARN_ON(drv_sta_state(local, sta->sdata, sta,
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state, state - 1));
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}
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mesh_plink_quiesce(sta);
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}
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mutex_unlock(&local->sta_mtx);
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/* remove all interfaces */
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list_for_each_entry(sdata, &local->interfaces, list) {
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static u8 zero_addr[ETH_ALEN] = {};
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u32 changed = 0;
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if (!ieee80211_sdata_running(sdata))
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continue;
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switch (sdata->vif.type) {
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case NL80211_IFTYPE_AP_VLAN:
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case NL80211_IFTYPE_MONITOR:
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/* skip these */
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continue;
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case NL80211_IFTYPE_STATION:
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if (sdata->vif.bss_conf.assoc)
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changed = BSS_CHANGED_ASSOC |
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BSS_CHANGED_BSSID |
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BSS_CHANGED_IDLE;
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break;
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_MESH_POINT:
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if (sdata->vif.bss_conf.enable_beacon)
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changed = BSS_CHANGED_BEACON_ENABLED;
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break;
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default:
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break;
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}
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ieee80211_quiesce(sdata);
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sdata->suspend_bss_conf = sdata->vif.bss_conf;
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memset(&sdata->vif.bss_conf, 0, sizeof(sdata->vif.bss_conf));
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sdata->vif.bss_conf.idle = true;
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if (sdata->suspend_bss_conf.bssid)
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sdata->vif.bss_conf.bssid = zero_addr;
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/* disable beaconing or remove association */
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ieee80211_bss_info_change_notify(sdata, changed);
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if (sdata->vif.type == NL80211_IFTYPE_AP &&
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rcu_access_pointer(sdata->u.ap.beacon))
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drv_stop_ap(local, sdata);
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if (local->use_chanctx) {
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struct ieee80211_chanctx_conf *conf;
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mutex_lock(&local->chanctx_mtx);
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conf = rcu_dereference_protected(
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sdata->vif.chanctx_conf,
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lockdep_is_held(&local->chanctx_mtx));
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if (conf) {
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ctx = container_of(conf,
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struct ieee80211_chanctx,
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conf);
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drv_unassign_vif_chanctx(local, sdata, ctx);
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}
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mutex_unlock(&local->chanctx_mtx);
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}
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drv_remove_interface(local, sdata);
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}
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sdata = rtnl_dereference(local->monitor_sdata);
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if (sdata) {
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if (local->use_chanctx) {
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struct ieee80211_chanctx_conf *conf;
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mutex_lock(&local->chanctx_mtx);
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conf = rcu_dereference_protected(
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sdata->vif.chanctx_conf,
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lockdep_is_held(&local->chanctx_mtx));
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if (conf) {
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ctx = container_of(conf,
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struct ieee80211_chanctx,
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conf);
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drv_unassign_vif_chanctx(local, sdata, ctx);
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}
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mutex_unlock(&local->chanctx_mtx);
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}
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drv_remove_interface(local, sdata);
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}
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mutex_lock(&local->chanctx_mtx);
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list_for_each_entry(ctx, &local->chanctx_list, list)
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drv_remove_chanctx(local, ctx);
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mutex_unlock(&local->chanctx_mtx);
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/* stop hardware - this must stop RX */
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if (local->open_count)
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ieee80211_stop_device(local);
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suspend:
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local->suspended = true;
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/* need suspended to be visible before quiescing is false */
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barrier();
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local->quiescing = false;
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return 0;
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}
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/*
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* __ieee80211_resume() is a static inline which just calls
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* ieee80211_reconfig(), which is also needed for hardware
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* hang/firmware failure/etc. recovery.
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*/
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