diff options
Diffstat (limited to 'drivers/acpi/namespace/nsalloc.c')
| -rw-r--r-- | drivers/acpi/namespace/nsalloc.c | 544 |
1 files changed, 0 insertions, 544 deletions
diff --git a/drivers/acpi/namespace/nsalloc.c b/drivers/acpi/namespace/nsalloc.c deleted file mode 100644 index cc7a85f8cfe..00000000000 --- a/drivers/acpi/namespace/nsalloc.c +++ /dev/null @@ -1,544 +0,0 @@ -/******************************************************************************* - * - * Module Name: nsalloc - Namespace allocation and deletion utilities - * - ******************************************************************************/ - -/* - * 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("nsalloc") - -/* Local prototypes */ -static void acpi_ns_remove_reference(struct acpi_namespace_node *node); - -/******************************************************************************* - * - * FUNCTION: acpi_ns_create_node - * - * PARAMETERS: Name - Name of the new node (4 char ACPI name) - * - * RETURN: New namespace node (Null on failure) - * - * DESCRIPTION: Create a namespace node - * - ******************************************************************************/ - -struct acpi_namespace_node *acpi_ns_create_node(u32 name) -{ - struct acpi_namespace_node *node; - - ACPI_FUNCTION_TRACE("ns_create_node"); - - node = ACPI_MEM_CALLOCATE(sizeof(struct acpi_namespace_node)); - if (!node) { - return_PTR(NULL); - } - - ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_allocated++); - - node->name.integer = name; - node->reference_count = 1; - ACPI_SET_DESCRIPTOR_TYPE(node, ACPI_DESC_TYPE_NAMED); - - return_PTR(node); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_delete_node - * - * PARAMETERS: Node - Node to be deleted - * - * RETURN: None - * - * DESCRIPTION: Delete a namespace node - * - ******************************************************************************/ - -void acpi_ns_delete_node(struct acpi_namespace_node *node) -{ - struct acpi_namespace_node *parent_node; - struct acpi_namespace_node *prev_node; - struct acpi_namespace_node *next_node; - - ACPI_FUNCTION_TRACE_PTR("ns_delete_node", node); - - parent_node = acpi_ns_get_parent_node(node); - - prev_node = NULL; - next_node = parent_node->child; - - /* Find the node that is the previous peer in the parent's child list */ - - while (next_node != node) { - prev_node = next_node; - next_node = prev_node->peer; - } - - if (prev_node) { - /* Node is not first child, unlink it */ - - prev_node->peer = next_node->peer; - if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { - prev_node->flags |= ANOBJ_END_OF_PEER_LIST; - } - } else { - /* Node is first child (has no previous peer) */ - - if (next_node->flags & ANOBJ_END_OF_PEER_LIST) { - /* No peers at all */ - - parent_node->child = NULL; - } else { /* Link peer list to parent */ - - parent_node->child = next_node->peer; - } - } - - ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); - - /* - * Detach an object if there is one then delete the node - */ - acpi_ns_detach_object(node); - ACPI_MEM_FREE(node); - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_install_node - * - * PARAMETERS: walk_state - Current state of the walk - * parent_node - The parent of the new Node - * Node - The new Node to install - * Type - ACPI object type of the new Node - * - * RETURN: None - * - * DESCRIPTION: Initialize a new namespace node and install it amongst - * its peers. - * - * Note: Current namespace lookup is linear search. This appears - * to be sufficient as namespace searches consume only a small - * fraction of the execution time of the ACPI subsystem. - * - ******************************************************************************/ - -void acpi_ns_install_node(struct acpi_walk_state *walk_state, struct acpi_namespace_node *parent_node, /* Parent */ - struct acpi_namespace_node *node, /* New Child */ - acpi_object_type type) -{ - acpi_owner_id owner_id = 0; - struct acpi_namespace_node *child_node; - - ACPI_FUNCTION_TRACE("ns_install_node"); - - /* - * Get the owner ID from the Walk state - * The owner ID is used to track table deletion and - * deletion of objects created by methods - */ - if (walk_state) { - owner_id = walk_state->owner_id; - } - - /* Link the new entry into the parent and existing children */ - - child_node = parent_node->child; - if (!child_node) { - parent_node->child = node; - node->flags |= ANOBJ_END_OF_PEER_LIST; - node->peer = parent_node; - } else { - while (!(child_node->flags & ANOBJ_END_OF_PEER_LIST)) { - child_node = child_node->peer; - } - - child_node->peer = node; - - /* Clear end-of-list flag */ - - child_node->flags &= ~ANOBJ_END_OF_PEER_LIST; - node->flags |= ANOBJ_END_OF_PEER_LIST; - node->peer = parent_node; - } - - /* Init the new entry */ - - node->owner_id = owner_id; - node->type = (u8) type; - - ACPI_DEBUG_PRINT((ACPI_DB_NAMES, - "%4.4s (%s) [Node %p Owner %X] added to %4.4s (%s) [Node %p]\n", - acpi_ut_get_node_name(node), - acpi_ut_get_type_name(node->type), node, owner_id, - acpi_ut_get_node_name(parent_node), - acpi_ut_get_type_name(parent_node->type), - parent_node)); - - /* - * Increment the reference count(s) of all parents up to - * the root! - */ - while ((node = acpi_ns_get_parent_node(node)) != NULL) { - node->reference_count++; - } - - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_delete_children - * - * PARAMETERS: parent_node - Delete this objects children - * - * RETURN: None. - * - * DESCRIPTION: Delete all children of the parent object. In other words, - * deletes a "scope". - * - ******************************************************************************/ - -void acpi_ns_delete_children(struct acpi_namespace_node *parent_node) -{ - struct acpi_namespace_node *child_node; - struct acpi_namespace_node *next_node; - struct acpi_namespace_node *node; - u8 flags; - - ACPI_FUNCTION_TRACE_PTR("ns_delete_children", parent_node); - - if (!parent_node) { - return_VOID; - } - - /* If no children, all done! */ - - child_node = parent_node->child; - if (!child_node) { - return_VOID; - } - - /* - * Deallocate all children at this level - */ - do { - /* Get the things we need */ - - next_node = child_node->peer; - flags = child_node->flags; - - /* Grandchildren should have all been deleted already */ - - if (child_node->child) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Found a grandchild! P=%p C=%p\n", - parent_node, child_node)); - } - - /* Now we can free this child object */ - - ACPI_MEM_TRACKING(acpi_gbl_ns_node_list->total_freed++); - - ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, - "Object %p, Remaining %X\n", child_node, - acpi_gbl_current_node_count)); - - /* - * Detach an object if there is one, then free the child node - */ - acpi_ns_detach_object(child_node); - - /* - * Decrement the reference count(s) of all parents up to - * the root! (counts were incremented when the node was created) - */ - node = child_node; - while ((node = acpi_ns_get_parent_node(node)) != NULL) { - node->reference_count--; - } - - /* There should be only one reference remaining on this node */ - - if (child_node->reference_count != 1) { - ACPI_REPORT_WARNING(("Existing references (%d) on node being deleted (%p)\n", child_node->reference_count, child_node)); - } - - /* Now we can delete the node */ - - ACPI_MEM_FREE(child_node); - - /* And move on to the next child in the list */ - - child_node = next_node; - - } while (!(flags & ANOBJ_END_OF_PEER_LIST)); - - /* Clear the parent's child pointer */ - - parent_node->child = NULL; - - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_delete_namespace_subtree - * - * PARAMETERS: parent_node - Root of the subtree to be deleted - * - * RETURN: None. - * - * DESCRIPTION: Delete a subtree of the namespace. This includes all objects - * stored within the subtree. - * - ******************************************************************************/ - -void acpi_ns_delete_namespace_subtree(struct acpi_namespace_node *parent_node) -{ - struct acpi_namespace_node *child_node = NULL; - u32 level = 1; - - ACPI_FUNCTION_TRACE("ns_delete_namespace_subtree"); - - if (!parent_node) { - return_VOID; - } - - /* - * Traverse the tree of objects until we bubble back up - * to where we started. - */ - while (level > 0) { - /* Get the next node in this scope (NULL if none) */ - - child_node = acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, - child_node); - if (child_node) { - /* Found a child node - detach any attached object */ - - acpi_ns_detach_object(child_node); - - /* Check if this node has any children */ - - if (acpi_ns_get_next_node - (ACPI_TYPE_ANY, child_node, NULL)) { - /* - * There is at least one child of this node, - * visit the node - */ - level++; - parent_node = child_node; - child_node = NULL; - } - } else { - /* - * No more children of this parent node. - * Move up to the grandparent. - */ - level--; - - /* - * Now delete all of the children of this parent - * all at the same time. - */ - acpi_ns_delete_children(parent_node); - - /* New "last child" is this parent node */ - - child_node = parent_node; - - /* Move up the tree to the grandparent */ - - parent_node = acpi_ns_get_parent_node(parent_node); - } - } - - return_VOID; -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_remove_reference - * - * PARAMETERS: Node - Named node whose reference count is to be - * decremented - * - * RETURN: None. - * - * DESCRIPTION: Remove a Node reference. Decrements the reference count - * of all parent Nodes up to the root. Any node along - * the way that reaches zero references is freed. - * - ******************************************************************************/ - -static void acpi_ns_remove_reference(struct acpi_namespace_node *node) -{ - struct acpi_namespace_node *parent_node; - struct acpi_namespace_node *this_node; - - ACPI_FUNCTION_ENTRY(); - - /* - * Decrement the reference count(s) of this node and all - * nodes up to the root, Delete anything with zero remaining references. - */ - this_node = node; - while (this_node) { - /* Prepare to move up to parent */ - - parent_node = acpi_ns_get_parent_node(this_node); - - /* Decrement the reference count on this node */ - - this_node->reference_count--; - - /* Delete the node if no more references */ - - if (!this_node->reference_count) { - /* Delete all children and delete the node */ - - acpi_ns_delete_children(this_node); - acpi_ns_delete_node(this_node); - } - - this_node = parent_node; - } -} - -/******************************************************************************* - * - * FUNCTION: acpi_ns_delete_namespace_by_owner - * - * PARAMETERS: owner_id - All nodes with this owner will be deleted - * - * RETURN: Status - * - * DESCRIPTION: Delete entries within the namespace that are owned by a - * specific ID. Used to delete entire ACPI tables. All - * reference counts are updated. - * - ******************************************************************************/ - -void acpi_ns_delete_namespace_by_owner(acpi_owner_id owner_id) -{ - struct acpi_namespace_node *child_node; - struct acpi_namespace_node *deletion_node; - u32 level; - struct acpi_namespace_node *parent_node; - - ACPI_FUNCTION_TRACE_U32("ns_delete_namespace_by_owner", owner_id); - - if (owner_id == 0) { - return_VOID; - } - - parent_node = acpi_gbl_root_node; - child_node = NULL; - deletion_node = NULL; - level = 1; - - /* - * Traverse the tree of nodes until we bubble back up - * to where we started. - */ - while (level > 0) { - /* - * Get the next child of this parent node. When child_node is NULL, - * the first child of the parent is returned - */ - child_node = - acpi_ns_get_next_node(ACPI_TYPE_ANY, parent_node, - child_node); - - if (deletion_node) { - acpi_ns_remove_reference(deletion_node); - deletion_node = NULL; - } - - if (child_node) { - if (child_node->owner_id == owner_id) { - /* Found a matching child node - detach any attached object */ - - acpi_ns_detach_object(child_node); - } - - /* Check if this node has any children */ - - if (acpi_ns_get_next_node - (ACPI_TYPE_ANY, child_node, NULL)) { - /* - * There is at least one child of this node, - * visit the node - */ - level++; - parent_node = child_node; - child_node = NULL; - } else if (child_node->owner_id == owner_id) { - deletion_node = child_node; - } - } else { - /* - * No more children of this parent node. - * Move up to the grandparent. - */ - level--; - if (level != 0) { - if (parent_node->owner_id == owner_id) { - deletion_node = parent_node; - } - } - - /* New "last child" is this parent node */ - - child_node = parent_node; - - /* Move up the tree to the grandparent */ - - parent_node = acpi_ns_get_parent_node(parent_node); - } - } - - return_VOID; -} |