437 lines
13 KiB
C
437 lines
13 KiB
C
/*******************************************************************************
|
|
*
|
|
* Module Name: nsobject - Utilities for objects attached to namespace
|
|
* table entries
|
|
*
|
|
******************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2005, R. Byron Moore
|
|
* 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_REPORT_ERROR(("ns_attach_object: Null named_obj handle\n"));
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (!object && (ACPI_TYPE_ANY != type)) {
|
|
/* Null object */
|
|
|
|
ACPI_REPORT_ERROR(("ns_attach_object: Null object, but type not ACPI_TYPE_ANY\n"));
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(node) != ACPI_DESC_TYPE_NAMED) {
|
|
/* Not a name handle */
|
|
|
|
ACPI_REPORT_ERROR(("ns_attach_object: Invalid handle %p [%s]\n",
|
|
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 name_obj %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_DEBUG_PRINT((ACPI_DB_WARN, "Null Node ptr\n"));
|
|
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);
|
|
}
|