mac80211: allow drivers to set default uAPSD parameters

mac80211 currently sets uAPSD parameters to have VO AC trigger-
and delivery-enabled, with maximum service period length.

Allow drivers to change these default settings since different
uAPSD client implementations may handle errors differently and
be able to recover from some errors.

Note: some APs may not function correctly if one or all ACs are
trigger- and delivery-enabled, see
http://thread.gmane.org/gmane.linux.kernel.wireless.general/93577.
We retested with this AP and later firmware doesn't have this
bug any more.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 9b536172e27e..23a275a9a3b2 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1534,6 +1534,17 @@ enum ieee80211_hw_flags {
  * @netdev_features: netdev features to be set in each netdev created
  *      from this HW. Note only HW checksum features are currently
  *      compatible with mac80211. Other feature bits will be rejected.
+ *
+ * @uapsd_queues: This bitmap is included in (re)association frame to indicate
+ *      for each access category if it is uAPSD trigger-enabled and delivery-
+ *      enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap.
+ *      Each bit corresponds to different AC. Value '1' in specific bit means
+ *      that corresponding AC is both trigger- and delivery-enabled. '0' means
+ *      neither enabled.
+ *
+ * @uapsd_max_sp_len: maximum number of total buffered frames the WMM AP may
+ *      deliver to a WMM STA during any Service Period triggered by the WMM STA.
+ *      Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values.
  */
 struct ieee80211_hw {
         struct ieee80211_conf conf;
@@ -1559,6 +1570,8 @@ struct ieee80211_hw {
         u8 radiotap_mcs_details;
         u16 radiotap_vht_details;
         netdev_features_t netdev_features;
+        u8 uapsd_queues;
+        u8 uapsd_max_sp_len;
 };
 
 /**