cfg80211: enable dynack through nl80211

Enable ACK timeout estimation algorithm (dynack) using mac80211
set_coverage_class API. Dynack is activated passing coverage class equals to -1
to lower drivers and it is automatically disabled setting valid value for
coverage class.
Define NL80211_ATTR_WIPHY_DYN_ACK flag attribute to enable dynack from
userspace. In order to activate dynack NL80211_FEATURE_ACKTO_ESTIMATION feature
flag must be set by lower drivers to indicate dynack capability.

Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index de69d3df5e55..29c4399e08b9 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1605,6 +1605,12 @@ enum nl80211_commands {
  *      association request. In addition, it must also set the RRM capability
  *      flag in the association request's Capability Info field.
  *
+ * @NL80211_ATTR_WIPHY_DYN_ACK: flag attribute used to enable ACK timeout
+ *      estimation algorithm (dynack). In order to activate dynack
+ *      %NL80211_FEATURE_ACKTO_ESTIMATION feature flag must be set by lower
+ *      drivers to indicate dynack capability. Dynack is automatically disabled
+ *      setting valid value for coverage class.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1949,6 +1955,8 @@ enum nl80211_attrs {
 
         NL80211_ATTR_USE_RRM,
 
+        NL80211_ATTR_WIPHY_DYN_ACK,
+
         /* add attributes here, update the policy in nl80211.c */
 
         __NL80211_ATTR_AFTER_LAST,
@@ -3991,6 +3999,9 @@ enum nl80211_ap_sme_features {
  *      current tx power value into the TPC Report IE in the spectrum
  *      management TPC Report action frame, and in the Radio Measurement Link
  *      Measurement Report action frame.
+ * @NL80211_FEATURE_ACKTO_ESTIMATION: This driver supports dynamic ACK timeout
+ *      estimation (dynack). %NL80211_ATTR_WIPHY_DYN_ACK flag attribute is used
+ *      to enable dynack.
  */
 enum nl80211_feature_flags {
         NL80211_FEATURE_SK_TX_STATUS                    = 1 << 0,
@@ -4016,6 +4027,7 @@ enum nl80211_feature_flags {
         NL80211_FEATURE_WFA_TPC_IE_IN_PROBES            = 1 << 20,
         NL80211_FEATURE_QUIET                           = 1 << 21,
         NL80211_FEATURE_TX_POWER_INSERTION              = 1 << 22,
+        NL80211_FEATURE_ACKTO_ESTIMATION                = 1 << 23,
 };
 
 /**