iwlwifi: support explicit monitor interface

Support explicit monitor interface to keep
injection working after the HW queue changes.
This also finally enables sniffer mode.

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

drivers/net/wireless/iwlwifi/iwl-agn-rxon.c

@@ -61,6 +61,10 @@ void iwl_connection_init_rx_config(struct iwl_priv *priv,
 						  RXON_FILTER_ACCEPT_GRP_MSK;
 		break;
 
+	case NL80211_IFTYPE_MONITOR:
+		ctx->staging.dev_type = RXON_DEV_TYPE_SNIFFER;
+		break;
+
 	default:
 		IWL_ERR(priv, "Unsupported interface type %d\n",
 			ctx->vif->type);

drivers/net/wireless/iwlwifi/iwl-agn.c

@@ -603,7 +603,7 @@ void iwl_init_context(struct iwl_priv *priv, u32 ucode_flags)
 	priv->contexts[IWL_RXON_CTX_BSS].wep_key_cmd = REPLY_WEPKEY;
 	priv->contexts[IWL_RXON_CTX_BSS].bcast_sta_id = IWLAGN_BROADCAST_ID;
 	priv->contexts[IWL_RXON_CTX_BSS].exclusive_interface_modes =
-		BIT(NL80211_IFTYPE_ADHOC);
+		BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_MONITOR);
 	priv->contexts[IWL_RXON_CTX_BSS].interface_modes =
 		BIT(NL80211_IFTYPE_STATION);
 	priv->contexts[IWL_RXON_CTX_BSS].ap_devtype = RXON_DEV_TYPE_AP;

drivers/net/wireless/iwlwifi/iwl-mac80211.c

@@ -150,6 +150,7 @@ int iwlagn_mac_setup_register(struct iwl_priv *priv,
 		    IEEE80211_HW_QUEUE_CONTROL |
 		    IEEE80211_HW_SUPPORTS_PS |
 		    IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
+		    IEEE80211_HW_WANT_MONITOR_VIF |
 		    IEEE80211_HW_SCAN_WHILE_IDLE;
 
 	hw->offchannel_tx_hw_queue = IWL_AUX_QUEUE;