ieee80211: definitions for reduced neighbor reports

Add the necessary definitions to parse reduced neighbor
report elements.
Signed-off-by: Tova Mussai <tova.mussai@intel.com>
[change struct name, remove IEEE80211_MIN_AP_NEIGHBOR_INFO_SIZE]
Link: https://lore.kernel.org/r/20200528213443.4f9154461c06.I518d9898ad982f838112ea9ca14a20d6bbb16394@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

include/linux/ieee80211.h

@@ -2754,6 +2754,8 @@ enum ieee80211_eid {
 	WLAN_EID_QUIET_CHANNEL = 198,
 	WLAN_EID_OPMODE_NOTIF = 199,
 
+	WLAN_EID_REDUCED_NEIGHBOR_REPORT = 201,
+
 	WLAN_EID_S1G_BCN_COMPAT = 213,
 	WLAN_EID_S1G_SHORT_BCN_INTERVAL = 214,
 	WLAN_EID_S1G_CAPABILITIES = 217,
@@ -3675,4 +3677,30 @@ static inline bool for_each_element_completed(const struct element *element,
 #define WLAN_RSNX_CAPA_PROTECTED_TWT BIT(4)
 #define WLAN_RSNX_CAPA_SAE_H2E BIT(5)
 
+/*
+ * reduced neighbor report, based on Draft P802.11ax_D5.0,
+ * section 9.4.2.170
+ */
+#define IEEE80211_AP_INFO_TBTT_HDR_TYPE				0x03
+#define IEEE80211_AP_INFO_TBTT_HDR_FILTERED			0x04
+#define IEEE80211_AP_INFO_TBTT_HDR_COLOC			0x08
+#define IEEE80211_AP_INFO_TBTT_HDR_COUNT			0xF0
+#define IEEE80211_TBTT_INFO_OFFSET_BSSID_BSS_PARAM		8
+#define IEEE80211_TBTT_INFO_OFFSET_BSSID_SSSID_BSS_PARAM	12
+
+#define IEEE80211_RNR_TBTT_PARAMS_OCT_RECOMMENDED		0x01
+#define IEEE80211_RNR_TBTT_PARAMS_SAME_SSID			0x02
+#define IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID			0x04
+#define IEEE80211_RNR_TBTT_PARAMS_TRANSMITTED_BSSID		0x08
+#define IEEE80211_RNR_TBTT_PARAMS_COLOC_ESS			0x10
+#define IEEE80211_RNR_TBTT_PARAMS_PROBE_ACTIVE			0x20
+#define IEEE80211_RNR_TBTT_PARAMS_COLOC_AP			0x40
+
+struct ieee80211_neighbor_ap_info {
+       u8 tbtt_info_hdr;
+       u8 tbtt_info_len;
+       u8 op_class;
+       u8 channel;
+} __packed;
+
 #endif /* LINUX_IEEE80211_H */