qcacmn: Add QCA vendor command to support beacon reporting feature

Add a QCA vendor sub command QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING
to implement beacon reporting feature. Different operations required to
implement this feature can be specified in
QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE.

Userspace requests the driver/firmware to periodically report received
Beacon frames whose BSSID matches the current connected BSS's MAC
address. If userspace requests the driver/firmware to send beacon
reports actively, the driver encapsulates the details of the beacon in
an event and sends it to userspace asynchronously. Otherwise, the driver
will only update the beacon in cfg80211 scan cache but will not send any
event to userspace.

If this command is not issued, the current behavior of the
driver/firmware is to update the cfg80211 scan cache only when there is
a scan issued by the host in progress or whenever there is a change in
IEs of the Beacon frames from the current connected BSS.

The userspace requests the driver/firmware to stop reporting beacons
when reporting is not required anymore. If the driver/firmware is not
able to receive Beacon frames because of other Wi-Fi operations such as
off-channel activities, etc., the driver/firmware sends a pause event to
userspace and stops reporting Beacon frames. The driver/firmware
indicates whether the beacon reporting automatically resumes later by
using the QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_AUTO_RESUMES flag. If
userspace doesn't want the beacon reporting to be resumed automatically,
userspace can send QCA_WLAN_VENDOR_BEACON_REPORTING_OP_STOP command to
the driver to stop beacon reporting.

Change-Id: Iaefecc744ba07bb573a98fd5e6e4705b16f8d2c8
CRs-Fixed: 2446114

os_if/linux/qca_vendor.h

@@ -291,6 +291,51 @@
  *	parameters including Zigbee state and specific WLAN periods to enhance
  *	PTA master. All this parameters are delivered by the NetLink attributes
  *	defined in "enum qca_mpta_helper_vendor_attr".
+ * @QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING: This sub command is used to
+ *	implement Beacon frame reporting feature.
+ *
+ *	Userspace can request the driver/firmware to periodically report
+ *	received Beacon frames whose BSSID is same as the current connected
+ *	BSS's MAC address.
+ *
+ *	In case the STA seamlessly (without sending disconnect indication to
+ *	userspace) roams to a different BSS, Beacon frame reporting will be
+ *	automatically enabled for the Beacon frames whose BSSID is same as the
+ *	MAC address of the new BSS. Beacon reporting will be stopped when the
+ *	STA is disconnected (when the disconnect indication is sent to
+ *	userspace) and need to be explicitly enabled by userspace for next
+ *	connection.
+ *
+ *	When a Beacon frame matching configured conditions is received, and if
+ *	userspace has requested to send asynchronous beacon reports, the
+ *	driver/firmware will encapsulate the details of the Beacon frame in an
+ *	event and send it to userspace along with updating the BSS information
+ *	in cfg80211 scan cache, otherwise driver will only update the cfg80211
+ *	scan cache with the information from the received Beacon frame but
+ *	will not send any active report to userspace.
+ *
+ *	The userspace can request the driver/firmware to stop reporting Beacon
+ *	frames. If the driver/firmware is not able to receive Beacon frames
+ *	due to other Wi-Fi operations such as off-channel activities, etc.,
+ *	the driver/firmware will send a pause event to userspace and stop
+ *	reporting Beacon frames. Whether the beacon reporting will be
+ *	automatically resumed or not by the driver/firmware later will be
+ *	reported to userspace using the
+ *	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_AUTO_RESUMES flag. The beacon
+ *	reporting shall be resumed for all the cases except disconnection
+ *	case as indicated by setting
+ *	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_PAUSE_REASON to
+ *	QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_DISCONNECTED by the
+ *	driver.
+ *
+ *	After QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_PAUSE event is received
+ *	by userspace with QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_AUTO_RESUMES
+ *	flag not set, the next first
+ *	QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO event from the driver
+ *	shall be considered as un-pause event.
+ *
+ *	All the attributes used with this command are defined in
+ *	enum qca_wlan_vendor_attr_beacon_reporting_params.
  */
 
 enum qca_nl80211_vendor_subcmds {
@@ -503,6 +548,7 @@ enum qca_nl80211_vendor_subcmds {
 	QCA_NL80211_VENDOR_SUBCMD_GET_FW_STATE = 177,
 	QCA_NL80211_VENDOR_SUBCMD_PEER_STATS_CACHE_FLUSH = 178,
 	QCA_NL80211_VENDOR_SUBCMD_MPTA_HELPER_CONFIG = 179,
+	QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING = 180,
 };
 
 enum qca_wlan_vendor_tos {
@@ -848,6 +894,7 @@ enum qca_wlan_vendor_attr_get_station_info {
  * @QCA_NL80211_VENDOR_SUBCMD_HANG_REASON_INDEX: hang event reason index
  * @QCA_NL80211_VENDOR_SUBCMD_WLAN_MAC_INFO_INDEX: MAC mode info index
  * @QCA_NL80211_VENDOR_SUBCMD_NAN_EXT_INDEX: NAN Extended index
+ * @QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING_INDEX: Beacon reporting index
  */
 
 enum qca_nl80211_vendor_subcmds_index {
@@ -931,6 +978,7 @@ enum qca_nl80211_vendor_subcmds_index {
 	QCA_NL80211_VENDOR_SUBCMD_THROUGHPUT_CHANGE_EVENT_INDEX,
 	QCA_NL80211_VENDOR_SUBCMD_LINK_PROPERTIES_INDEX,
 	QCA_NL80211_VENDOR_SUBCMD_PEER_STATS_CACHE_FLUSH_INDEX,
+	QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING_INDEX,
 };
 
 /**
@@ -6958,4 +7006,176 @@ enum qca_mpta_helper_vendor_attr {
 	QCA_MPTA_HELPER_VENDOR_ATTR_MAX =
 		QCA_MPTA_HELPER_VENDOR_ATTR_AFTER_LAST - 1
 };
+
+/**
+ * enum qca_wlan_vendor_beacon_reporting_op_types - Defines different types of
+ * operations for which %QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING can be
+ * used. Will be used by %QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE.
+ *
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_OP_START: Sent by userspace to the driver
+ * to request the driver to start reporting Beacon frames.
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_OP_STOP: Sent by userspace to the driver
+ * to request the driver to stop reporting Beacon frames.
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO: Sent by the driver to
+ * userspace to report received Beacon frames.
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_OP_PAUSE: Sent by the driver to userspace
+ * to indicate that the driver is going to pause reporting Beacon frames.
+ */
+enum qca_wlan_vendor_beacon_reporting_op_types {
+	QCA_WLAN_VENDOR_BEACON_REPORTING_OP_START = 0,
+	QCA_WLAN_VENDOR_BEACON_REPORTING_OP_STOP = 1,
+	QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO = 2,
+	QCA_WLAN_VENDOR_BEACON_REPORTING_OP_PAUSE = 3,
+};
+
+/**
+ * enum qca_wlan_vendor_beacon_reporting_pause_reasons - Defines different
+ * types of reasons for which the driver is pausing reporting Beacon frames.
+ * Will be used by %QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_PAUSE_REASON.
+ *
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_UNSPECIFIED: For unspecified
+ * reasons.
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_SCAN_STARTED: When the
+ * driver/firmware is starting a scan.
+ * @QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_DISCONNECTED: When the
+ * driver/firmware disconnects from the ESS and indicates the disconnection to
+ * userspace (non-seamless roaming case). This reason code will be used by the
+ * driver/firmware to indicate stopping of beacon report events. Userspace
+ * will need to start beacon reporting again (if desired) by sending vendor
+ * command QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING with
+ * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE set to
+ * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_START after the next connection is
+ * completed.
+ */
+enum qca_wlan_vendor_beacon_reporting_pause_reasons {
+	QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_UNSPECIFIED = 0,
+	QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_SCAN_STARTED = 1,
+	QCA_WLAN_VENDOR_BEACON_REPORTING_PAUSE_REASON_DISCONNECTED = 2,
+};
+
+/*
+ * enum qca_wlan_vendor_attr_beacon_reporting_params - List of attributes used
+ * in vendor sub-command QCA_NL80211_VENDOR_SUBCMD_BEACON_REPORTING.
+ */
+enum qca_wlan_vendor_attr_beacon_reporting_params {
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_INVALID = 0,
+	/* Specifies the type of operation that the vendor command/event is
+	 * intended for. Possible values for this attribute are defined in
+	 * enum qca_wlan_vendor_beacon_reporting_op_types. u32 attribute.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE = 1,
+	/* Optionally set by userspace to request the driver to report Beacon
+	 * frames using asynchronous vendor events when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_START. NLA_FLAG attribute.
+	 * If this flag is not set, the driver will only update Beacon frames
+	 * in cfg80211 scan cache but not send any vendor events.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_ACTIVE_REPORTING = 2,
+	/* Optionally used by userspace to request the driver/firmware to
+	 * report Beacon frames periodically when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_START.
+	 * u32 attribute, indicates the period of Beacon frames to be reported
+	 * and in the units of beacon interval.
+	 * If this attribute is missing in the command, then the default value
+	 * of 1 will be assumed by driver, i.e., to report every Beacon frame.
+	 * Zero is an invalid value.
+	 * If a valid value is received for this attribute, the driver will
+	 * update the cfg80211 scan cache periodically as per the value
+	 * received in this attribute in addition to updating the cfg80211 scan
+	 * cache when there is significant change in Beacon frame IEs.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_PERIOD = 3,
+	/* Used by the driver to encapsulate the SSID when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO.
+	 * u8 array with a maximum size of 32.
+	 *
+	 * When generating beacon report from non-MBSSID Beacon frame, the SSID
+	 * will be taken from the SSID element of the received Beacon frame.
+	 *
+	 * When generating beacon report from Multiple BSSID Beacon frame and
+	 * if the BSSID of the current connected BSS matches the BSSID of the
+	 * transmitting BSS, the SSID will be taken from the SSID element of
+	 * the received Beacon frame.
+	 *
+	 * When generating beacon report from Multiple BSSID Beacon frame and
+	 * if the BSSID of the current connected BSS matches the BSSID of one
+	 * of the* nontransmitting BSSs, the SSID will be taken from the SSID
+	 * field included in the nontransmitted BSS profile whose derived BSSI
+	 * is same as the BSSID of the current connected BSS. When there is no
+	 * nontransmitted BSS profile whose derived BSSID is same as the BSSID
+	 * of current connected* BSS, this attribute will not be present.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_SSID = 4,
+	/* Used by the driver to encapsulate the BSSID of the AP to which STA
+	 * is currently connected to when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO. u8 array with a
+	 * fixed size of 6 bytes.
+	 *
+	 * When generating beacon report from a Multiple BSSID beacon and the
+	 * current connected BSSID matches one of the nontransmitted BSSIDs in
+	 * a Multiple BSSID set, this BSSID will be that particular
+	 * nontransmitted BSSID and not the transmitted BSSID (i.e., the
+	 * transmitting address of the Beacon frame).
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_BSSID = 5,
+	/* Used by the driver to encapsulate the frequency in MHz on which
+	 * the Beacon frame was received when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is
+	 * set to QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO.
+	 * u32 attribute.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_FREQ = 6,
+	/* Used by the driver to encapsulate the Beacon interval
+	 * when the QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO.
+	 * u16 attribute. The value will be copied from the Beacon frame and
+	 * the units are TUs.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_BI = 7,
+	/* Used by the driver to encapsulate the Timestamp field from the
+	 * Beacon frame when the QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE
+	 * is set to QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO.
+	 * u64 attribute.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_TSF = 8,
+	/* Used by the driver to encapsulate the CLOCK_BOOTTIME when this
+	 * Beacon frame is received in the driver when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO. u64 attribute, in
+	 * the units of nanoseconds. This value is expected to have accuracy of
+	 * about 10 ms.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_BOOTTIME_WHEN_RECEIVED = 9,
+	/* Used by the driver to encapsulate the IEs of the Beacon frame from
+	 * which this event is generated when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_BEACON_INFO. u8 array.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_IES = 10,
+	/* Used by the driver to specify the reason for the driver/firmware to
+	 * pause sending beacons to userspace when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_PAUSE. Possible values are
+	 * defined in enum qca_wlan_vendor_beacon_reporting_pause_reasons, u32
+	 * attribute.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_PAUSE_REASON = 11,
+	/* Used by the driver to specify whether the driver will automatically
+	 * resume reporting beacon events to userspace later (for example after
+	 * the ongoing off-channel activity is completed etc.) when the
+	 * QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_OP_TYPE is set to
+	 * QCA_WLAN_VENDOR_BEACON_REPORTING_OP_PAUSE. NLA_FLAG attribute.
+	 */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_AUTO_RESUMES = 12,
+
+	/* Keep last */
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_LAST,
+	QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_MAX =
+		QCA_WLAN_VENDOR_ATTR_BEACON_REPORTING_LAST - 1
+};
+
 #endif