mac80211: add spectrum capabilities

This patch add spectrum capability and required information
elements to association request providing AP has requested it and
it is supported by the driver

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Assaf Krauss <assaf.krauss@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

include/net/mac80211.h

@@ -710,6 +710,10 @@ enum ieee80211_tkip_key_type {
  * @IEEE80211_HW_NOISE_DBM:
  *	Hardware can provide noise (radio interference) values in units dBm,
  *      decibel difference from one milliwatt.
+ *
+ * @IEEE80211_HW_SPECTRUM_MGMT:
+ * 	Hardware supports spectrum management defined in 802.11h
+ * 	Measurement, Channel Switch, Quieting, TPC
  */
 enum ieee80211_hw_flags {
 	IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE		= 1<<0,
@@ -721,6 +725,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_SIGNAL_DB				= 1<<6,
 	IEEE80211_HW_SIGNAL_DBM				= 1<<7,
 	IEEE80211_HW_NOISE_DBM				= 1<<8,
+	IEEE80211_HW_SPECTRUM_MGMT			= 1<<9,
 };
 
 /**

net/mac80211/mlme.c

@@ -747,6 +747,10 @@ static void ieee80211_send_assoc(struct net_device *dev,
 		 * b-only mode) */
 		rates_len = ieee80211_compatible_rates(bss, sband, &rates);
 
+		if ((bss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
+		    (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
+			capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
+
 		ieee80211_rx_bss_put(dev, bss);
 	} else {
 		rates = ~0;
@@ -814,6 +818,26 @@ static void ieee80211_send_assoc(struct net_device *dev,
 		}
 	}
 
+	if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
+		/* 1. power capabilities */
+		pos = skb_put(skb, 4);
+		*pos++ = WLAN_EID_PWR_CAPABILITY;
+		*pos++ = 2;
+		*pos++ = 0; /* min tx power */
+		*pos++ = local->hw.conf.channel->max_power; /* max tx power */
+
+		/* 2. supported channels */
+		/* TODO: get this in reg domain format */
+		pos = skb_put(skb, 2 * sband->n_channels + 2);
+		*pos++ = WLAN_EID_SUPPORTED_CHANNELS;
+		*pos++ = 2 * sband->n_channels;
+		for (i = 0; i < sband->n_channels; i++) {
+			*pos++ = ieee80211_frequency_to_channel(
+					sband->channels[i].center_freq);
+			*pos++ = 1; /* one channel in the subband*/
+		}
+	}
+
 	if (ifsta->extra_ie) {
 		pos = skb_put(skb, ifsta->extra_ie_len);
 		memcpy(pos, ifsta->extra_ie, ifsta->extra_ie_len);