mac80211: add MCS information to radiotap

This adds the MCS information we currently get
from the drivers into radiotap.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/include/net/ieee80211_radiotap.h b/include/net/ieee80211_radiotap.h
index af49f8ab7f81..b0be5fb9de19 100644
--- a/include/net/ieee80211_radiotap.h
+++ b/include/net/ieee80211_radiotap.h
@@ -178,6 +178,11 @@ struct ieee80211_radiotap_header {
  *
  *     Number of unicast retries a transmitted frame used.
  *
+ * IEEE80211_RADIOTAP_MCS       u8, u8, u8              unitless
+ *
+ *     Contains a bitmap of known fields/flags, the flags, and
+ *     the MCS index.
+ *
  */
 enum ieee80211_radiotap_type {
         IEEE80211_RADIOTAP_TSFT = 0,
@@ -199,6 +204,8 @@ enum ieee80211_radiotap_type {
         IEEE80211_RADIOTAP_RTS_RETRIES = 16,
         IEEE80211_RADIOTAP_DATA_RETRIES = 17,
 
+        IEEE80211_RADIOTAP_MCS = 19,
+
         /* valid in every it_present bitmap, even vendor namespaces */
         IEEE80211_RADIOTAP_RADIOTAP_NAMESPACE = 29,
         IEEE80211_RADIOTAP_VENDOR_NAMESPACE = 30,
@@ -245,6 +252,24 @@ enum ieee80211_radiotap_type {
 #define IEEE80211_RADIOTAP_F_TX_CTS     0x0002  /* used cts 'protection' */
 #define IEEE80211_RADIOTAP_F_TX_RTS     0x0004  /* used rts/cts handshake */
 
+
+/* For IEEE80211_RADIOTAP_MCS */
+#define IEEE80211_RADIOTAP_MCS_HAVE_BW          0x01
+#define IEEE80211_RADIOTAP_MCS_HAVE_MCS         0x02
+#define IEEE80211_RADIOTAP_MCS_HAVE_GI          0x04
+#define IEEE80211_RADIOTAP_MCS_HAVE_FMT         0x08
+#define IEEE80211_RADIOTAP_MCS_HAVE_FEC         0x10
+
+#define IEEE80211_RADIOTAP_MCS_BW_MASK          0x03
+#define         IEEE80211_RADIOTAP_MCS_BW_20    0
+#define         IEEE80211_RADIOTAP_MCS_BW_40    1
+#define         IEEE80211_RADIOTAP_MCS_BW_20L   2
+#define         IEEE80211_RADIOTAP_MCS_BW_20U   3
+#define IEEE80211_RADIOTAP_MCS_SGI              0x04
+#define IEEE80211_RADIOTAP_MCS_FMT_GF           0x08
+#define IEEE80211_RADIOTAP_MCS_FEC_LDPC         0x10
+
+
 /* Ugly macro to convert literal channel numbers into their mhz equivalents
  * There are certianly some conditions that will break this (like feeding it '30')
  * but they shouldn't arise since nothing talks on channel 30. */