mac80211: Add MIC space only for TX key option

Add a key flag to indicates that the device only needs
MIC space and not a real MIC.
In such cases, keep the MIC zeroed for ease of debug.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 2ee4af25256d..906e90223066 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1552,6 +1552,9 @@ struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif);
  * @IEEE80211_KEY_FLAG_RESERVE_TAILROOM: This flag should be set by the
  *      driver for a key to indicate that sufficient tailroom must always
  *      be reserved for ICV or MIC, even when HW encryption is enabled.
+ * @IEEE80211_KEY_FLAG_PUT_MIC_SPACE: This flag should be set by the driver for
+ *      a TKIP key if it only requires MIC space. Do not set together with
+ *      @IEEE80211_KEY_FLAG_GENERATE_MMIC on the same key.
  */
 enum ieee80211_key_flags {
         IEEE80211_KEY_FLAG_GENERATE_IV_MGMT     = BIT(0),
@@ -1562,6 +1565,7 @@ enum ieee80211_key_flags {
         IEEE80211_KEY_FLAG_PUT_IV_SPACE         = BIT(5),
         IEEE80211_KEY_FLAG_RX_MGMT              = BIT(6),
         IEEE80211_KEY_FLAG_RESERVE_TAILROOM     = BIT(7),
+        IEEE80211_KEY_FLAG_PUT_MIC_SPACE        = BIT(8),
 };
 
 /**
@@ -1593,8 +1597,8 @@ struct ieee80211_key_conf {
         u8 icv_len;
         u8 iv_len;
         u8 hw_key_idx;
-        u8 flags;
         s8 keyidx;
+        u16 flags;
         u8 keylen;
         u8 key[0];
 };