1 files changed, 440 insertions, 0 deletions
diff --git a/drivers/acpi/namespace/nsobject.c b/drivers/acpi/namespace/nsobject.c
new file mode 100644
index 0000000..15fe09e
--- /dev/null
+++ b/drivers/acpi/namespace/nsobject.c
@@ -0,0 +1,440 @@
+/*******************************************************************************
+ *
+ * Module Name: nsobject - Utilities for objects attached to namespace
+ *                         table entries
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+#include <acpi/acpi.h>
+#include <acpi/acnamesp.h>
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("nsobject")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_attach_object
+ *
+ * PARAMETERS:  Node                - Parent Node
+ *              Object              - Object to be attached
+ *              Type                - Type of object, or ACPI_TYPE_ANY if not
+ *                                    known
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Record the given object as the value associated with the
+ *              name whose acpi_handle is passed.  If Object is NULL
+ *              and Type is ACPI_TYPE_ANY, set the name as having no value.
+ *              Note: Future may require that the Node->Flags field be passed
+ *              as a parameter.
+ *
+ * MUTEX:       Assumes namespace is locked
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ns_attach_object(struct acpi_namespace_node *node,
+		      union acpi_operand_object *object, acpi_object_type type)
+{
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *last_obj_desc;
+	acpi_object_type object_type = ACPI_TYPE_ANY;
+
+	ACPI_FUNCTION_TRACE(ns_attach_object);
+
+	/*
+	 * Parameter validation
+	 */
+	if (!node) {
+
+		/* Invalid handle */
+
+		ACPI_ERROR((AE_INFO, "Null NamedObj handle"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (!object && (ACPI_TYPE_ANY != type)) {
+
+		/* Null object */
+
+		ACPI_ERROR((AE_INFO,
+			    "Null object, but type not ACPI_TYPE_ANY"));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
+
+		/* Not a name handle */
+
+		ACPI_ERROR((AE_INFO, "Invalid handle %p [%s]",
+			    node, acpi_ut_get_descriptor_name(node)));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Check if this object is already attached */
+
+	if (node->object == object) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "Obj %p already installed in NameObj %p\n",
+				  object, node));
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* If null object, we will just install it */
+
+	if (!object) {
+		obj_desc = NULL;
+		object_type = ACPI_TYPE_ANY;
+	}
+
+	/*
+	 * If the source object is a namespace Node with an attached object,
+	 * we will use that (attached) object
+	 */
+	else if ((ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) &&
+		 ((struct acpi_namespace_node *)object)->object) {
+		/*
+		 * Value passed is a name handle and that name has a
+		 * non-null value.  Use that name's value and type.
+		 */
+		obj_desc = ((struct acpi_namespace_node *)object)->object;
+		object_type = ((struct acpi_namespace_node *)object)->type;
+	}
+
+	/*
+	 * Otherwise, we will use the parameter object, but we must type
+	 * it first
+	 */
+	else {
+		obj_desc = (union acpi_operand_object *)object;
+
+		/* Use the given type */
+
+		object_type = type;
+	}
+
+	ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
+			  obj_desc, node, acpi_ut_get_node_name(node)));
+
+	/* Detach an existing attached object if present */
+
+	if (node->object) {
+		acpi_ns_detach_object(node);
+	}
+
+	if (obj_desc) {
+		/*
+		 * Must increment the new value's reference count
+		 * (if it is an internal object)
+		 */
+		acpi_ut_add_reference(obj_desc);
+
+		/*
+		 * Handle objects with multiple descriptors - walk
+		 * to the end of the descriptor list
+		 */
+		last_obj_desc = obj_desc;
+		while (last_obj_desc->common.next_object) {
+			last_obj_desc = last_obj_desc->common.next_object;
+		}
+
+		/* Install the object at the front of the object list */
+
+		last_obj_desc->common.next_object = node->object;
+	}
+
+	node->type = (u8) object_type;
+	node->object = obj_desc;
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_detach_object
+ *
+ * PARAMETERS:  Node           - A Namespace node whose object will be detached
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Detach/delete an object associated with a namespace node.
+ *              if the object is an allocated object, it is freed.
+ *              Otherwise, the field is simply cleared.
+ *
+ ******************************************************************************/
+
+void acpi_ns_detach_object(struct acpi_namespace_node *node)
+{
+	union acpi_operand_object *obj_desc;
+
+	ACPI_FUNCTION_TRACE(ns_detach_object);
+
+	obj_desc = node->object;
+
+	if (!obj_desc ||
+	    (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA)) {
+		return_VOID;
+	}
+
+	/* Clear the entry in all cases */
+
+	node->object = NULL;
+	if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == ACPI_DESC_TYPE_OPERAND) {
+		node->object = obj_desc->common.next_object;
+		if (node->object &&
+		    (ACPI_GET_OBJECT_TYPE(node->object) !=
+		     ACPI_TYPE_LOCAL_DATA)) {
+			node->object = node->object->common.next_object;
+		}
+	}
+
+	/* Reset the node type to untyped */
+
+	node->type = ACPI_TYPE_ANY;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n",
+			  node, acpi_ut_get_node_name(node), obj_desc));
+
+	/* Remove one reference on the object (and all subobjects) */
+
+	acpi_ut_remove_reference(obj_desc);
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_attached_object
+ *
+ * PARAMETERS:  Node             - Namespace node
+ *
+ * RETURN:      Current value of the object field from the Node whose
+ *              handle is passed
+ *
+ * DESCRIPTION: Obtain the object attached to a namespace node.
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ns_get_attached_object(struct
+						       acpi_namespace_node
+						       *node)
+{
+	ACPI_FUNCTION_TRACE_PTR(ns_get_attached_object, node);
+
+	if (!node) {
+		ACPI_WARNING((AE_INFO, "Null Node ptr"));
+		return_PTR(NULL);
+	}
+
+	if (!node->object ||
+	    ((ACPI_GET_DESCRIPTOR_TYPE(node->object) != ACPI_DESC_TYPE_OPERAND)
+	     && (ACPI_GET_DESCRIPTOR_TYPE(node->object) !=
+		 ACPI_DESC_TYPE_NAMED))
+	    || (ACPI_GET_OBJECT_TYPE(node->object) == ACPI_TYPE_LOCAL_DATA)) {
+		return_PTR(NULL);
+	}
+
+	return_PTR(node->object);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_secondary_object
+ *
+ * PARAMETERS:  Node             - Namespace node
+ *
+ * RETURN:      Current value of the object field from the Node whose
+ *              handle is passed.
+ *
+ * DESCRIPTION: Obtain a secondary object associated with a namespace node.
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ns_get_secondary_object(union
+							acpi_operand_object
+							*obj_desc)
+{
+	ACPI_FUNCTION_TRACE_PTR(ns_get_secondary_object, obj_desc);
+
+	if ((!obj_desc) ||
+	    (ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) ||
+	    (!obj_desc->common.next_object) ||
+	    (ACPI_GET_OBJECT_TYPE(obj_desc->common.next_object) ==
+	     ACPI_TYPE_LOCAL_DATA)) {
+		return_PTR(NULL);
+	}
+
+	return_PTR(obj_desc->common.next_object);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_attach_data
+ *
+ * PARAMETERS:  Node            - Namespace node
+ *              Handler         - Handler to be associated with the data
+ *              Data            - Data to be attached
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Low-level attach data.  Create and attach a Data object.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_attach_data(struct acpi_namespace_node *node,
+		    acpi_object_handler handler, void *data)
+{
+	union acpi_operand_object *prev_obj_desc;
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *data_desc;
+
+	/* We only allow one attachment per handler */
+
+	prev_obj_desc = NULL;
+	obj_desc = node->object;
+	while (obj_desc) {
+		if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
+		    (obj_desc->data.handler == handler)) {
+			return (AE_ALREADY_EXISTS);
+		}
+
+		prev_obj_desc = obj_desc;
+		obj_desc = obj_desc->common.next_object;
+	}
+
+	/* Create an internal object for the data */
+
+	data_desc = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_DATA);
+	if (!data_desc) {
+		return (AE_NO_MEMORY);
+	}
+
+	data_desc->data.handler = handler;
+	data_desc->data.pointer = data;
+
+	/* Install the data object */
+
+	if (prev_obj_desc) {
+		prev_obj_desc->common.next_object = data_desc;
+	} else {
+		node->object = data_desc;
+	}
+
+	return (AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_detach_data
+ *
+ * PARAMETERS:  Node            - Namespace node
+ *              Handler         - Handler associated with the data
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Low-level detach data.  Delete the data node, but the caller
+ *              is responsible for the actual data.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_detach_data(struct acpi_namespace_node * node,
+		    acpi_object_handler handler)
+{
+	union acpi_operand_object *obj_desc;
+	union acpi_operand_object *prev_obj_desc;
+
+	prev_obj_desc = NULL;
+	obj_desc = node->object;
+	while (obj_desc) {
+		if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
+		    (obj_desc->data.handler == handler)) {
+			if (prev_obj_desc) {
+				prev_obj_desc->common.next_object =
+				    obj_desc->common.next_object;
+			} else {
+				node->object = obj_desc->common.next_object;
+			}
+
+			acpi_ut_remove_reference(obj_desc);
+			return (AE_OK);
+		}
+
+		prev_obj_desc = obj_desc;
+		obj_desc = obj_desc->common.next_object;
+	}
+
+	return (AE_NOT_FOUND);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_attached_data
+ *
+ * PARAMETERS:  Node            - Namespace node
+ *              Handler         - Handler associated with the data
+ *              Data            - Where the data is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Low level interface to obtain data previously associated with
+ *              a namespace node.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_get_attached_data(struct acpi_namespace_node * node,
+			  acpi_object_handler handler, void **data)
+{
+	union acpi_operand_object *obj_desc;
+
+	obj_desc = node->object;
+	while (obj_desc) {
+		if ((ACPI_GET_OBJECT_TYPE(obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
+		    (obj_desc->data.handler == handler)) {
+			*data = obj_desc->data.pointer;
+			return (AE_OK);
+		}
+
+		obj_desc = obj_desc->common.next_object;
+	}
+
+	return (AE_NOT_FOUND);
+}