qcacmn: Define QDF API to check if driver unload is in progress

Define a QDF API to check if driver unload is in progress such that
driver unload can be checked from CMN components.

Change-Id: I397b0b6252ed8fd9558f04802cf55fdc61a39d83
CRs-Fixed: 2605656

qdf/inc/qdf_platform.h

@@ -106,6 +106,23 @@ void qdf_register_wmi_send_recv_qmi_callback(qdf_wmi_send_over_qmi_callback
 QDF_STATUS qdf_wmi_send_recv_qmi(void *buf, uint32_t len, void *cb_ctx,
 				 qdf_wmi_recv_qmi_cb wmi_rx_cb);
 
+/**
+ * qdf_is_driver_unloading_callback() - callback to get driver unloading in progress
+ * or not
+ *
+ * Return: true if driver is unloading else false
+ */
+typedef bool (*qdf_is_driver_unloading_callback)(void);
+
+/**
+ * qdf_register_is_driver_unloading_callback() - driver unloading callback
+ * @callback:  driver unloading callback
+ *
+ * Return: None
+ */
+void qdf_register_is_driver_unloading_callback(
+				qdf_is_driver_unloading_callback callback);
+
 /**
  * qdf_register_self_recovery_callback() - register self recovery callback
  * @callback:  self recovery callback
@@ -130,8 +147,8 @@ void __qdf_trigger_self_recovery(enum qdf_hang_reason reason,
 				 const char *func, const uint32_t line);
 
 /**
- * qdf_is_recovering_callback() - callback to get driver recovering in progress
- * or not
+ * qdf_is_recovering_callback() - callback to get driver recovering in
+ * progress or not
  *
  * Return: true if driver is doing recovering else false
  */
@@ -146,6 +163,14 @@ typedef bool (*qdf_is_recovering_callback)(void);
 void qdf_register_recovering_state_query_callback(
 	qdf_is_recovering_callback is_recovering);
 
+/**
+ * qdf_is_driver_unloading() - get driver unloading in progress status
+ * or not
+ *
+ * Return: true if driver is unloading else false
+ */
+bool qdf_is_driver_unloading(void);
+
 /**
  * qdf_is_recovering() - get driver recovering in progress status
  * or not

qdf/src/qdf_platform.c

@@ -26,6 +26,7 @@
  */
 static qdf_self_recovery_callback	self_recovery_cb;
 static qdf_is_fw_down_callback		is_fw_down_cb;
+static qdf_is_driver_unloading_callback is_driver_unloading_cb;
 static qdf_is_recovering_callback	is_recovering_cb;
 static qdf_is_drv_connected_callback    is_drv_connected_cb;
 static qdf_wmi_send_over_qmi_callback _wmi_send_recv_qmi_cb;
@@ -71,6 +72,14 @@ QDF_STATUS qdf_wmi_send_recv_qmi(void *buf, uint32_t len, void *cb_ctx,
 
 qdf_export_symbol(qdf_wmi_send_recv_qmi);
 
+void qdf_register_is_driver_unloading_callback(
+				qdf_is_driver_unloading_callback callback)
+{
+	is_driver_unloading_cb = callback;
+}
+
+qdf_export_symbol(qdf_register_is_driver_unloading_callback);
+
 void qdf_register_self_recovery_callback(qdf_self_recovery_callback callback)
 {
 	self_recovery_cb = callback;
@@ -95,6 +104,15 @@ void qdf_register_recovering_state_query_callback(
 	is_recovering_cb = is_recovering;
 }
 
+bool qdf_is_driver_unloading(void)
+{
+	if (is_driver_unloading_cb)
+		return is_driver_unloading_cb();
+	return false;
+}
+
+qdf_export_symbol(qdf_is_driver_unloading);
+
 bool qdf_is_recovering(void)
 {
 	if (is_recovering_cb)