mac80211: support hw scan while idle

Currently, mac80211 goes to idle-off before starting a scan.
However, some devices that implement hw scan might not
need going idle-off in order to perform a hw scan, and
thus saving some energy and simplifying their state machine.

(Note that this is also the case for sched scan - it
currently doesn't make mac80211 go idle-off)

Add a new flag to indicate support for hw scan while idle.

Signed-off-by: Eliad Peller <eliad@wizery.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 922313f0b39b..cbff4f94a200 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1164,6 +1164,10 @@ enum sta_notify_cmd {
  * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session
  *      setup strictly in HW. mac80211 should not attempt to do this in
  *      software.
+ *
+ * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while
+ *      being idle (i.e. mac80211 doesn't have to go idle-off during the
+ *      the scan).
  */
 enum ieee80211_hw_flags {
         IEEE80211_HW_HAS_RATE_CONTROL                   = 1<<0,
@@ -1190,6 +1194,7 @@ enum ieee80211_hw_flags {
         IEEE80211_HW_SUPPORTS_PER_STA_GTK               = 1<<21,
         IEEE80211_HW_AP_LINK_PS                         = 1<<22,
         IEEE80211_HW_TX_AMPDU_SETUP_IN_HW               = 1<<23,
+        IEEE80211_HW_SCAN_WHILE_IDLE                    = 1<<24,
 };
 
 /**