wireless: implement basic rate helper function

[firefly-linux-kernel-4.4.55.git] / include / net / wireless.h

diff --git a/include/net/wireless.h b/include/net/wireless.h
index 41294c5f6f8ffc9a7db3b046dc191c738bae4528..17d4b582cf346a9370dbbb1fb99c37173e33c69a 100644 (file)
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -340,6 +340,22 @@ ieee80211_get_channel(struct wiphy *wiphy, int freq)
        return __ieee80211_get_channel(wiphy, freq);
 }
 
+/**
+ * ieee80211_get_response_rate - get basic rate for a given rate
+ *
+ * @sband: the band to look for rates in
+ * @basic_rates: bitmap of basic rates
+ * @bitrate: the bitrate for which to find the basic rate
+ *
+ * This function returns the basic rate corresponding to a given
+ * bitrate, that is the next lower bitrate contained in the basic
+ * rate map, which is, for this function, given as a bitmap of
+ * indices of rates in the band's bitrate table.
+ */
+struct ieee80211_rate *
+ieee80211_get_response_rate(struct ieee80211_supported_band *sband,
+                           u64 basic_rates, int bitrate);
+
 /**
  * regulatory_hint - driver hint to the wireless core a regulatory domain
  * @wiphy: the wireless device giving the hint (used only for reporting