--- /dev/null
+/*******************************************************************************
+ *
+ * Module Name: nsxfobj - Public interfaces to the ACPI subsystem
+ * ACPI Object oriented interfaces
+ *
+ ******************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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.
+ */
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+
+#define _COMPONENT ACPI_NAMESPACE
+ACPI_MODULE_NAME("nsxfobj")
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_type
+ *
+ * PARAMETERS: handle - Handle of object whose type is desired
+ * ret_type - Where the type will be placed
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: This routine returns the type associatd with a particular handle
+ *
+ ******************************************************************************/
+acpi_status acpi_get_type(acpi_handle handle, acpi_object_type * ret_type)
+{
+ struct acpi_namespace_node *node;
+ acpi_status status;
+
+ /* Parameter Validation */
+
+ if (!ret_type) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /*
+ * Special case for the predefined Root Node
+ * (return type ANY)
+ */
+ if (handle == ACPI_ROOT_OBJECT) {
+ *ret_type = ACPI_TYPE_ANY;
+ return (AE_OK);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Convert and validate the handle */
+
+ node = acpi_ns_validate_handle(handle);
+ if (!node) {
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (AE_BAD_PARAMETER);
+ }
+
+ *ret_type = node->type;
+
+ status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_type)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_parent
+ *
+ * PARAMETERS: handle - Handle of object whose parent is desired
+ * ret_handle - Where the parent handle will be placed
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Returns a handle to the parent of the object represented by
+ * Handle.
+ *
+ ******************************************************************************/
+acpi_status acpi_get_parent(acpi_handle handle, acpi_handle * ret_handle)
+{
+ struct acpi_namespace_node *node;
+ struct acpi_namespace_node *parent_node;
+ acpi_status status;
+
+ if (!ret_handle) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /* Special case for the predefined Root Node (no parent) */
+
+ if (handle == ACPI_ROOT_OBJECT) {
+ return (AE_NULL_ENTRY);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Convert and validate the handle */
+
+ node = acpi_ns_validate_handle(handle);
+ if (!node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+
+ /* Get the parent entry */
+
+ parent_node = node->parent;
+ *ret_handle = ACPI_CAST_PTR(acpi_handle, parent_node);
+
+ /* Return exception if parent is null */
+
+ if (!parent_node) {
+ status = AE_NULL_ENTRY;
+ }
+
+unlock_and_exit:
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_parent)
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_next_object
+ *
+ * PARAMETERS: type - Type of object to be searched for
+ * parent - Parent object whose children we are getting
+ * last_child - Previous child that was found.
+ * The NEXT child will be returned
+ * ret_handle - Where handle to the next object is placed
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Return the next peer object within the namespace. If Handle is
+ * valid, Scope is ignored. Otherwise, the first object within
+ * Scope is returned.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_get_next_object(acpi_object_type type,
+ acpi_handle parent,
+ acpi_handle child, acpi_handle * ret_handle)
+{
+ acpi_status status;
+ struct acpi_namespace_node *node;
+ struct acpi_namespace_node *parent_node = NULL;
+ struct acpi_namespace_node *child_node = NULL;
+
+ /* Parameter validation */
+
+ if (type > ACPI_TYPE_EXTERNAL_MAX) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* If null handle, use the parent */
+
+ if (!child) {
+
+ /* Start search at the beginning of the specified scope */
+
+ parent_node = acpi_ns_validate_handle(parent);
+ if (!parent_node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+ } else {
+ /* Non-null handle, ignore the parent */
+ /* Convert and validate the handle */
+
+ child_node = acpi_ns_validate_handle(child);
+ if (!child_node) {
+ status = AE_BAD_PARAMETER;
+ goto unlock_and_exit;
+ }
+ }
+
+ /* Internal function does the real work */
+
+ node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
+ if (!node) {
+ status = AE_NOT_FOUND;
+ goto unlock_and_exit;
+ }
+
+ if (ret_handle) {
+ *ret_handle = ACPI_CAST_PTR(acpi_handle, node);
+ }
+
+unlock_and_exit:
+
+ (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+ return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_next_object)
Code Review / kvmfornfv.git / blobdiff