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mac80211: add radar detection command/event

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Add command to trigger radar detection in the driver/FW.
Once radar detection is started it should continuously
monitor for radars as long as the channel active.
If radar is detected usermode notified with 'radar
detected' event.

Scanning and remain on channel functionality must be disabled
while doing radar detection/scanning, and vice versa.

Based on original patch by Victor Goldenshtein <victorg@ti.com>

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Simon Wunderlich
2013-02-08 18:16:20 +01:00
committed by Johannes Berg
parent 04f39047af
commit 164eb02d07
11 changed files with 204 additions and 1 deletions
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46
net/mac80211/util.c
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@@ -2133,3 +2133,49 @@ u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
return ts;
}
void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
{
struct ieee80211_sub_if_data *sdata;
mutex_lock(&local->iflist_mtx);
list_for_each_entry(sdata, &local->interfaces, list) {
cancel_delayed_work_sync(&sdata->dfs_cac_timer_work);
if (sdata->wdev.cac_started) {
ieee80211_vif_release_channel(sdata);
cfg80211_cac_event(sdata->dev,
NL80211_RADAR_CAC_ABORTED,
GFP_KERNEL);
}
}
mutex_unlock(&local->iflist_mtx);
}
void ieee80211_dfs_radar_detected_work(struct work_struct *work)
{
struct ieee80211_local *local =
container_of(work, struct ieee80211_local, radar_detected_work);
struct cfg80211_chan_def chandef;
ieee80211_dfs_cac_cancel(local);
if (local->use_chanctx)
/* currently not handled */
WARN_ON(1);
else {
cfg80211_chandef_create(&chandef, local->hw.conf.channel,
local->hw.conf.channel_type);
cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
}
}
void ieee80211_radar_detected(struct ieee80211_hw *hw)
{
struct ieee80211_local *local = hw_to_local(hw);
trace_api_radar_detected(local);
ieee80211_queue_work(hw, &local->radar_detected_work);
}
EXPORT_SYMBOL(ieee80211_radar_detected);