mac80211: add basic support for WoWLAN

This adds basic support for the new WoWLAN
configuration in mac80211. The behaviour is
completely offloaded to the driver though,
with two new callbacks (suspend/resume).

Options for the driver include a complete
reconfiguration after wakeup, and exposing
all the triggers it wants to support.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 63f75a06043b..9e5542794b95 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1606,6 +1606,18 @@ enum ieee80211_ampdu_mlme_action {
  *      you should ensure to cancel it on this callback.
  *      Must be implemented and can sleep.
  *
+ * @suspend: Suspend the device; mac80211 itself will quiesce before and
+ *      stop transmitting and doing any other configuration, and then
+ *      ask the device to suspend. This is only invoked when WoWLAN is
+ *      configured, otherwise the device is deconfigured completely and
+ *      reconfigured at resume time.
+ *
+ * @resume: If WoWLAN was configured, this indicates that mac80211 is
+ *      now resuming its operation, after this the device must be fully
+ *      functional again. If this returns an error, the only way out is
+ *      to also unregister the device. If it returns 1, then mac80211
+ *      will also go through the regular complete restart on resume.
+ *
  * @add_interface: Called when a netdevice attached to the hardware is
  *      enabled. Because it is not called for monitor mode devices, @start
  *      and @stop must be implemented.
@@ -1831,6 +1843,10 @@ struct ieee80211_ops {
         void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
         int (*start)(struct ieee80211_hw *hw);
         void (*stop)(struct ieee80211_hw *hw);
+#ifdef CONFIG_PM
+        int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan);
+        int (*resume)(struct ieee80211_hw *hw);
+#endif
         int (*add_interface)(struct ieee80211_hw *hw,
                              struct ieee80211_vif *vif);
         int (*change_interface)(struct ieee80211_hw *hw,