nl80211: add support for mcs masks

Allow to set mcs masks through nl80211. We also allow to set MCS
rates but no legacy rates (and vice versa).

Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 5 insertions, 2 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 4f98fae13307..ad56e21a9f10 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1475,6 +1475,7 @@ enum nl80211_attrs {
 #define NL80211_ATTR_FEATURE_FLAGS NL80211_ATTR_FEATURE_FLAGS
 
 #define NL80211_MAX_SUPP_RATES                  32
+#define NL80211_MAX_SUPP_HT_RATES               77
 #define NL80211_MAX_SUPP_REG_RULES              32
 #define NL80211_TKIP_DATA_OFFSET_ENCR_KEY       0
 #define NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY     16
@@ -2405,12 +2406,15 @@ enum nl80211_key_attributes {
  *      in an array of rates as defined in IEEE 802.11 7.3.2.2 (u8 values with
  *      1 = 500 kbps) but without the IE length restriction (at most
  *      %NL80211_MAX_SUPP_RATES in a single array).
+ * @NL80211_TXRATE_MCS: HT (MCS) rates allowed for TX rate selection
+ *      in an array of MCS numbers.
  * @__NL80211_TXRATE_AFTER_LAST: internal
  * @NL80211_TXRATE_MAX: highest TX rate attribute
  */
 enum nl80211_tx_rate_attributes {
         __NL80211_TXRATE_INVALID,
         NL80211_TXRATE_LEGACY,
+        NL80211_TXRATE_MCS,
 
         /* keep last */
         __NL80211_TXRATE_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 5bb3ed4f99f5..2964205332f4 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1232,8 +1232,7 @@ enum wiphy_params_flags {
 struct cfg80211_bitrate_mask {
         struct {
                 u32 legacy;
-                /* TODO: add support for masking MCS rates; e.g.: */
-                /* u8 mcs[IEEE80211_HT_MCS_MASK_LEN]; */
+                u8 mcs[IEEE80211_HT_MCS_MASK_LEN];
         } control[IEEE80211_NUM_BANDS];
 };
 /**