iwlwifi: Extended Key ID support for mvm and dvm

All iwlwifi cards below the 22000 series are able to handle multiple
keyids per STA and allow the selection of the encryption key per MPDU.

These are therefore fully compatible with the Extended Key ID support
implementation in mac80211.

Enable Extended Key ID support for all dvm cards and the mvm cards not
using the incompatible new Tx API introduced for the 22000 series.
Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
Link: https://lore.kernel.org/r/20190819180540.2855-1-alexander@wetzel-home.deSigned-off-by: Luca Coelho <luciano.coelho@intel.com>

drivers/net/wireless/intel/iwlwifi/dvm/mac80211.c

@@ -200,6 +200,7 @@ int iwlagn_mac_setup_register(struct iwl_priv *priv,
 	iwl_leds_init(priv);
 
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
+	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_EXT_KEY_ID);
 
 	ret = ieee80211_register_hw(priv->hw);
 	if (ret) {

drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c

@@ -543,6 +543,14 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 
 	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
 	wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_VHT_IBSS);
+
+	/* The new Tx API does not allow to pass the key or keyid of a MPDU to
+	 * the hw, preventing us to control which key(id) to use per MPDU.
+	 * Till that's fixed we can't use Extended Key ID for the newer cards.
+	 */
+	if (!iwl_mvm_has_new_tx_api(mvm))
+		wiphy_ext_feature_set(hw->wiphy,
+				      NL80211_EXT_FEATURE_EXT_KEY_ID);
 	hw->wiphy->features |= NL80211_FEATURE_HT_IBSS;
 
 	hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;