nl80211: add rate flags for 5/10 Mhz channels

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 316f34b..e3a39fc 100644 (file)
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -188,6 +188,8 @@ struct ieee80211_channel {
  *     when used with 802.11g (on the 2.4 GHz band); filled by the
  *     core code when registering the wiphy.
  * @IEEE80211_RATE_ERP_G: This is an ERP rate in 802.11g mode.
+ * @IEEE80211_RATE_SUPPORTS_5MHZ: Rate can be used in 5 MHz mode
+ * @IEEE80211_RATE_SUPPORTS_10MHZ: Rate can be used in 10 MHz mode
  */
 enum ieee80211_rate_flags {
        IEEE80211_RATE_SHORT_PREAMBLE   = 1<<0,
@@ -195,6 +197,8 @@ enum ieee80211_rate_flags {
        IEEE80211_RATE_MANDATORY_B      = 1<<2,
        IEEE80211_RATE_MANDATORY_G      = 1<<3,
        IEEE80211_RATE_ERP_G            = 1<<4,
+       IEEE80211_RATE_SUPPORTS_5MHZ    = 1<<5,
+       IEEE80211_RATE_SUPPORTS_10MHZ   = 1<<6,
 };
 
 /**
@@ -432,6 +436,30 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
                             const struct cfg80211_chan_def *chandef,
                             u32 prohibited_flags);
 
+/**
+ * ieee80211_chandef_rate_flags - returns rate flags for a channel
+ *
+ * In some channel types, not all rates may be used - for example CCK
+ * rates may not be used in 5/10 MHz channels.
+ *
+ * @chandef: channel definition for the channel
+ *
+ * Returns: rate flags which apply for this channel
+ */
+static inline enum ieee80211_rate_flags
+ieee80211_chandef_rate_flags(struct cfg80211_chan_def *chandef)
+{
+       switch (chandef->width) {
+       case NL80211_CHAN_WIDTH_5:
+               return IEEE80211_RATE_SUPPORTS_5MHZ;
+       case NL80211_CHAN_WIDTH_10:
+               return IEEE80211_RATE_SUPPORTS_10MHZ;
+       default:
+               break;
+       }
+       return 0;
+}
+
 /**
  * enum survey_info_flags - survey information flags
  *