acpi: add walk_namespace bus and device method

Change-Id: I03fa43e0ba9b37f6db43f6ff16bbca892684cc49
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2446
Reviewed-by: Adrien Destugues <[email protected]>

headers/os/drivers/ACPI.h

@@ -174,6 +174,9 @@ typedef void (*acpi_notify_handler)(acpi_handle device, uint32 value,
 typedef acpi_status (*acpi_walk_resources_callback)(acpi_resource* resource,
 	void* context);
 
+typedef acpi_status (*acpi_walk_callback) (acpi_handle object, uint32 nestingLevel,
+	void *context, void** returnValue);
+
 
 struct acpi_module_info {
 	module_info info;
@@ -240,6 +243,12 @@ struct acpi_module_info {
 					char *result, size_t length, void **_counter);
 	status_t	(*get_next_object)(uint32 objectType, acpi_handle parent,
 					acpi_handle* currentChild);
+	status_t	(*walk_namespace)(acpi_handle busDeviceHandle,
+					uint32 objectType, uint32 maxDepth,
+					acpi_walk_callback descendingCallback,
+					acpi_walk_callback ascendingCallback, void* context,
+					void** returnValue);
+
 	status_t	(*get_device)(const char *hid, uint32 index, char *result,
 					size_t resultLength);
 
@@ -337,6 +346,11 @@ typedef struct acpi_device_module_info {
 	uint32		(*get_object_type)(acpi_device device);
 	status_t	(*get_object)(acpi_device device, const char *path,
 					acpi_object_type **_returnValue);
+	status_t	(*walk_namespace)(acpi_device device,
+					uint32 objectType, uint32 maxDepth,
+					acpi_walk_callback descendingCallback,
+					acpi_walk_callback ascendingCallback,
+					void* context, void** returnValue);
 
 	/* Control method execution and data acquisition */
 	status_t	(*evaluate_method)(acpi_device device, const char *method,

src/add-ons/kernel/bus_managers/acpi/ACPIPrivate.h

@@ -221,6 +221,10 @@ status_t get_object(const char* path, acpi_object_type** _returnValue);
 status_t get_object_typed(const char* path, acpi_object_type** _returnValue,
 	uint32 object_type);
 status_t ns_handle_to_pathname(acpi_handle targetHandle, acpi_data* buffer);
+status_t walk_namespace(acpi_handle busDeviceHandle, uint32 objectType,
+	uint32 maxDepth, acpi_walk_callback descendingCallback,
+	acpi_walk_callback ascendingCallback, void* context, void** returnValue);
+
 
 status_t evaluate_object(acpi_handle handle, const char* object,
 	acpi_objects* args, acpi_object_type* returnValue, size_t bufferLength);

src/add-ons/kernel/bus_managers/acpi/BusManager.cpp

@@ -733,6 +733,17 @@ walk_resources(acpi_handle busDeviceHandle, char* method,
 }
 
 
+status_t
+walk_namespace(acpi_handle busDeviceHandle, uint32 objectType,
+	uint32 maxDepth, acpi_walk_callback descendingCallback,
+	acpi_walk_callback ascendingCallback, void* context, void** returnValue)
+{
+	return AcpiWalkNamespace(objectType, busDeviceHandle, maxDepth,
+		(ACPI_WALK_CALLBACK)descendingCallback,
+		(ACPI_WALK_CALLBACK)ascendingCallback, context, returnValue);
+}
+
+
 status_t
 prepare_sleep_state(uint8 state, void (*wakeFunc)(void), size_t size)
 {
@@ -866,6 +877,7 @@ struct acpi_module_info gACPIModule = {
 	remove_fixed_event_handler,
 	get_next_entry,
 	get_next_object,
+	walk_namespace,
 	get_device,
 	get_device_info,
 	get_object_type,

src/add-ons/kernel/bus_managers/acpi/Device.cpp

@@ -84,6 +84,16 @@ acpi_walk_resources(acpi_device device, char *method,
 }
 
 
+static status_t
+acpi_walk_namespace(acpi_device device, uint32 objectType, uint32 maxDepth,
+	acpi_walk_callback descendingCallback,
+	acpi_walk_callback ascendingCallback, void* context, void** returnValue)
+{
+	return walk_namespace(device->handle, objectType, maxDepth,
+		descendingCallback, ascendingCallback, context, returnValue);
+}
+
+
 static status_t
 acpi_device_init_driver(device_node *node, void **cookie)
 {
@@ -162,6 +172,7 @@ acpi_device_module_info gACPIDeviceModule = {
 	acpi_remove_address_space_handler,
 	acpi_get_object_type,
 	acpi_get_object,
+	acpi_walk_namespace,
 	acpi_evaluate_method,
 	acpi_walk_resources
 };