qcacmn: Add supporting functions for extended capabilities IE

Add structures and supporting function get bit field value of extended
capabilities IE bit field.

Change-Id: Iff915320d71473310e2cbc0188508061b14a40f1
CRs-Fixed: 2296592

umac/cmn_services/cmn_defs/inc/wlan_cmn_ieee80211.h

@@ -1088,6 +1088,18 @@ struct wlan_esp_ie {
 	struct wlan_esp_info esp_info_AC_VO;
 } qdf_packed;
 
+/**
+ * struct wlan_ext_cap_ie - struct for extended capabilities information
+ * @ext_cap_id: Extended capabilities id
+ * @ext_cap_len: Extended capabilities IE len
+ * @ext_caps: Variable length extended capabilities information
+ */
+struct wlan_ext_cap_ie {
+	uint8_t ext_cap_id;
+	uint8_t ext_cap_len;
+	uint8_t ext_caps[];
+} qdf_packed;
+
 /**
  * struct oce_reduced_wan_metrics: struct for oce wan metrics
  * @downlink_av_cap: Download available capacity

umac/scan/dispatcher/inc/wlan_scan_public_structs.h

@@ -1376,4 +1376,16 @@ enum scan_config {
 	SCAN_CFG_DISABLE_SCAN_COMMAND_TIMEOUT,
 	SCAN_CFG_DROP_BCN_ON_CHANNEL_MISMATCH,
 };
+
+/**
+ * enum ext_cap_bit_field - Extended capabilities bit field
+ * @BSS_2040_COEX_MGMT_SUPPORT: 20/40 BSS Coexistence Management Support field
+ * @OBSS_NARROW_BW_RU_IN_ULOFDMA_TOLERENT_SUPPORT: OBSS Narrow  Bandwidth RU
+ *     in UL OFDMA  Tolerance Support
+ */
+enum ext_cap_bit_field {
+	BSS_2040_COEX_MGMT_SUPPORT = 0,
+	OBSS_NARROW_BW_RU_IN_ULOFDMA_TOLERENT_SUPPORT = 79,
+};
+
 #endif

umac/scan/dispatcher/inc/wlan_scan_utils_api.h

@@ -1308,6 +1308,42 @@ util_scan_entry_extcaps(struct scan_cache_entry *scan_entry)
 	return scan_entry->ie_list.extcaps;
 }
 
+/**
+ * util_scan_entry_get_extcap() - function to read extended capability field ie
+ * @scan_entry: scan entry
+ * @extcap_bit_field: extended capability bit field
+ * @extcap_value: pointer to fill extended capability field value
+ *
+ * API, function to read extended capability field
+ *
+ * Return: QDF_STATUS_SUCCESS if extended capability field is found
+ *         QDF_STATUS_E_NOMEM if extended capability field is not found
+ */
+static inline QDF_STATUS
+util_scan_entry_get_extcap(struct scan_cache_entry *scan_entry,
+			   enum ext_cap_bit_field extcap_bit_field,
+			   uint8_t *extcap_value)
+{
+	struct wlan_ext_cap_ie *ext_cap =
+		(struct wlan_ext_cap_ie *)util_scan_entry_extcaps(scan_entry);
+
+	uint8_t ext_caps_byte = (extcap_bit_field >> 3);
+	uint8_t ext_caps_bit_pos = extcap_bit_field & 0x7;
+
+	*extcap_value = 0;
+
+	if (!ext_cap)
+		return QDF_STATUS_E_NULL_VALUE;
+
+	if (ext_cap->ext_cap_len < ext_caps_byte)
+		return QDF_STATUS_E_NULL_VALUE;
+
+	*extcap_value =
+		((ext_cap->ext_caps[ext_caps_byte] >> ext_caps_bit_pos) & 0x1);
+
+	return QDF_STATUS_SUCCESS;
+}
+
 /**
  * util_scan_entry_athcaps() - function to read ath caps vendor ie
  * @scan_entry: scan entry