qcacmn: Add support for audio transport switch vendor command

Based on the new requirement, add support for vendor command
to switch the audio transport bearer.

Change-Id: I85e61dfbcec55bad7685f143d7128654e47b66f3
CRs-Fixed: 3585196

os_if/linux/qca_vendor.h

@@ -792,6 +792,39 @@
  *
  *	Uses the attributes defined in
  *	enum qca_wlan_vendor_attr_tdls_disc_rsp_ext.
+ *
+ * @QCA_NL80211_VENDOR_SUBCMD_AUDIO_TRANSPORT_SWITCH: This vendor subcommand is
+ *	used to configure and indicate the audio transport switch in both
+ *	command and event paths. This is used when two or more audio transports
+ *	(ex: WLAN and bluetooth) are available between peers.
+ *
+ *	If the driver needs to perform operations like scan, connection,
+ *	roaming, RoC etc. and AP concurrency policy is set to either
+ *	QCA_WLAN_CONCURRENT_AP_POLICY_GAMING_AUDIO or
+ *	QCA_WLAN_CONCURRENT_AP_POLICY_LOSSLESS_AUDIO_STREAMING, the driver sends
+ *	audio transport switch event to userspace. Userspace application upon
+ *	receiving the event, can try to switch to requested audio transport.
+ *	The userspace uses this command to send the status of transport
+ *	switching (either confirm or reject) to the driver using this
+ *	subcommand. The driver continues with the pending operation either upon
+ *	receiving the command from userspace or after waiting for timeout since
+ *	sending the event to userspace. The driver can request userspace to
+ *	switch to WLAN upon availability of WLAN audio transport once after the
+ *	concurrent operations are completed.
+ *
+ *	Userspace can also request audio transport switch from non-WLAN to WLAN
+ *	using this subcommand to the driver. The driver can accept or reject
+ *	depending on other concurrent operations in progress. The driver returns
+ *	success if it can allow audio transport when it receives the command or
+ *	appropriate kernel error code otherwise. Userspace indicates the audio
+ *	transport switch from WLAN to non-WLAN using this subcommand and the
+ *	driver can do other concurrent operations without needing to send any
+ *	event to userspace. This subcommand is used by userspace only when the
+ *	driver advertises support for
+ *	QCA_WLAN_VENDOR_FEATURE_ENHANCED_AUDIO_EXPERIENCE_OVER_WLAN.
+ *
+ *	The attributes used with this command are defined in enum
+ *	qca_wlan_vendor_attr_audio_transport_switch.
  */
 
 enum qca_nl80211_vendor_subcmds {
@@ -1053,6 +1086,7 @@ enum qca_nl80211_vendor_subcmds {
 	QCA_NL80211_VENDOR_SUBCMD_TID_TO_LINK_MAP = 229,
 	QCA_NL80211_VENDOR_SUBCMD_LINK_RECONFIG = 230,
 	QCA_NL80211_VENDOR_SUBCMD_TDLS_DISC_RSP_EXT = 231,
+	QCA_NL80211_VENDOR_SUBCMD_AUDIO_TRANSPORT_SWITCH = 232,
 };
 
 enum qca_wlan_vendor_tos {
@@ -16852,4 +16886,64 @@ enum qca_wlan_vendor_opm_mode {
 	QCA_WLAN_VENDOR_OPM_MODE_USER_DEFINED = 2,
 };
 
+/* enum qca_wlan_audio_transport_switch_type - Represents the possible transport
+ * switch types.
+ *
+ * @QCA_WLAN_AUDIO_TRANSPORT_SWITCH_TYPE_NON_WLAN: Request to route audio data
+ * via non-WLAN transport (ex: bluetooth).
+ *
+ * @QCA_WLAN_AUDIO_TRANSPORT_SWITCH_TYPE_WLAN: Request to route audio data via
+ * WLAN transport.
+ */
+enum qca_wlan_audio_transport_switch_type {
+	QCA_WLAN_AUDIO_TRANSPORT_SWITCH_TYPE_NON_WLAN = 0,
+	QCA_WLAN_AUDIO_TRANSPORT_SWITCH_TYPE_WLAN = 1,
+};
+
+/**
+ * enum qca_wlan_audio_transport_switch_status - Represents the status of audio
+ * transport switch request.
+ *
+ * @QCA_WLAN_AUDIO_TRANSPORT_SWITCH_STATUS_REJECTED: Request to switch transport
+ * has been rejected. For ex: when transport switch is requested from WLAN
+ * to non-WLAN transport, user space modules and peers would evaluate the switch
+ * request and may not be ready for switch and hence switch to non-WLAN transport
+ * gets rejected.
+ *
+ * @QCA_WLAN_AUDIO_TRANSPORT_SWITCH_STATUS_COMPLETED: Request to switch transport
+ * has been completed. This is sent only in command path. Ex: when host driver
+ * had requested for audio transport switch and userspace modules as well as
+ * peers are ready for the switch, userspace module switches the transport and
+ * sends subcommand with status completed to host driver.
+ */
+enum qca_wlan_audio_transport_switch_status {
+	QCA_WLAN_AUDIO_TRANSPORT_SWITCH_STATUS_REJECTED = 0,
+	QCA_WLAN_AUDIO_TRANSPORT_SWITCH_STATUS_COMPLETED = 1,
+};
+
+/**
+ * enum qca_wlan_vendor_attr_audio_transport_switch - Attributes used by
+ * %QCA_NL80211_VENDOR_SUBCMD_AUDIO_TRANSPORT_SWITCH vendor command.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_TYPE: u8 attribute. Indicates
+ * the transport switch type from one of the values in enum
+ * qca_wlan_audio_transport_switch_type. This is mandatory param in both
+ * command and event path. This attribute is included in both requests and
+ * responses.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_STATUS: u8 attribute. Indicates
+ * the transport switch status from one of the values in enum
+ * qca_wlan_audio_transport_switch_status. This is optional param and used in
+ * both command and event path. This attribute must not be included in requests.
+ */
+enum qca_wlan_vendor_attr_audio_transport_switch {
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_INVALID = 0,
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_TYPE = 1,
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_STATUS = 2,
+	/* keep last */
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_AFTER_LAST,
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_MAX =
+	QCA_WLAN_VENDOR_ATTR_AUDIO_TRANSPORT_SWITCH_AFTER_LAST - 1,
+};
+
 #endif