/******************************************************************************* * * Module Name: nsalloc - Namespace allocation and deletion utilities * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nsalloc") /******************************************************************************* * * FUNCTION: AcpiNsCreateNode * * PARAMETERS: Name - Name of the new node (4 char ACPI name) * * RETURN: New namespace node (Null on failure) * * DESCRIPTION: Create a namespace node * ******************************************************************************/ ACPI_NAMESPACE_NODE * AcpiNsCreateNode ( UINT32 Name) { ACPI_NAMESPACE_NODE *Node; #ifdef ACPI_DBG_TRACK_ALLOCATIONS UINT32 Temp; #endif ACPI_FUNCTION_TRACE (NsCreateNode); Node = AcpiOsAcquireObject (AcpiGbl_NamespaceCache); if (!Node) { return_PTR (NULL); } ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalAllocated++); #ifdef ACPI_DBG_TRACK_ALLOCATIONS Temp = AcpiGbl_NsNodeList->TotalAllocated - AcpiGbl_NsNodeList->TotalFreed; if (Temp > AcpiGbl_NsNodeList->MaxOccupied) { AcpiGbl_NsNodeList->MaxOccupied = Temp; } #endif Node->Name.Integer = Name; ACPI_SET_DESCRIPTOR_TYPE (Node, ACPI_DESC_TYPE_NAMED); return_PTR (Node); } /******************************************************************************* * * FUNCTION: AcpiNsDeleteNode * * PARAMETERS: Node - Node to be deleted * * RETURN: None * * DESCRIPTION: Delete a namespace node. All node deletions must come through * here. Detaches any attached objects, including any attached * data. If a handler is associated with attached data, it is * invoked before the node is deleted. * ******************************************************************************/ void AcpiNsDeleteNode ( ACPI_NAMESPACE_NODE *Node) { ACPI_OPERAND_OBJECT *ObjDesc; ACPI_OPERAND_OBJECT *NextDesc; ACPI_FUNCTION_NAME (NsDeleteNode); if (!Node) { return_VOID; } /* Detach an object if there is one */ AcpiNsDetachObject (Node); /* * Delete an attached data object list if present (objects that were * attached via AcpiAttachData). Note: After any normal object is * detached above, the only possible remaining object(s) are data * objects, in a linked list. */ ObjDesc = Node->Object; while (ObjDesc && (ObjDesc->Common.Type == ACPI_TYPE_LOCAL_DATA)) { /* Invoke the attached data deletion handler if present */ if (ObjDesc->Data.Handler) { ObjDesc->Data.Handler (Node, ObjDesc->Data.Pointer); } NextDesc = ObjDesc->Common.NextObject; AcpiUtRemoveReference (ObjDesc); ObjDesc = NextDesc; } /* Special case for the statically allocated root node */ if (Node == AcpiGbl_RootNode) { return; } /* Now we can delete the node */ (void) AcpiOsReleaseObject (AcpiGbl_NamespaceCache, Node); ACPI_MEM_TRACKING (AcpiGbl_NsNodeList->TotalFreed++); ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Node %p, Remaining %X\n", Node, AcpiGbl_CurrentNodeCount)); } /******************************************************************************* * * FUNCTION: AcpiNsRemoveNode * * PARAMETERS: Node - Node to be removed/deleted * * RETURN: None * * DESCRIPTION: Remove (unlink) and delete a namespace node * ******************************************************************************/ void AcpiNsRemoveNode ( ACPI_NAMESPACE_NODE *Node) { ACPI_NAMESPACE_NODE *ParentNode; ACPI_NAMESPACE_NODE *PrevNode; ACPI_NAMESPACE_NODE *NextNode; ACPI_FUNCTION_TRACE_PTR (NsRemoveNode, Node); ParentNode = Node->Parent; PrevNode = NULL; NextNode = ParentNode->Child; /* Find the node that is the previous peer in the parent's child list */ while (NextNode != Node) { PrevNode = NextNode; NextNode = NextNode->Peer; } if (PrevNode) { /* Node is not first child, unlink it */ PrevNode->Peer = Node->Peer; } else { /* * Node is first child (has no previous peer). * Link peer list to parent */ ParentNode->Child = Node->Peer; } /* Delete the node and any attached objects */ AcpiNsDeleteNode (Node); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiNsInstallNode * * PARAMETERS: WalkState - Current state of the walk * ParentNode - 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 AcpiNsInstallNode ( ACPI_WALK_STATE *WalkState, ACPI_NAMESPACE_NODE *ParentNode, /* Parent */ ACPI_NAMESPACE_NODE *Node, /* New Child*/ ACPI_OBJECT_TYPE Type) { ACPI_OWNER_ID OwnerId = 0; ACPI_NAMESPACE_NODE *ChildNode; ACPI_FUNCTION_TRACE (NsInstallNode); if (WalkState) { /* * Get the owner ID from the Walk state. The owner ID is used to * track table deletion and deletion of objects created by methods. */ OwnerId = WalkState->OwnerId; if ((WalkState->MethodDesc) && (ParentNode != WalkState->MethodNode)) { /* * A method is creating a new node that is not a child of the * method (it is non-local). Mark the executing method as having * modified the namespace. This is used for cleanup when the * method exits. */ WalkState->MethodDesc->Method.InfoFlags |= ACPI_METHOD_MODIFIED_NAMESPACE; } } /* Link the new entry into the parent and existing children */ Node->Peer = NULL; Node->Parent = ParentNode; ChildNode = ParentNode->Child; if (!ChildNode) { ParentNode->Child = Node; } else { /* Add node to the end of the peer list */ while (ChildNode->Peer) { ChildNode = ChildNode->Peer; } ChildNode->Peer = Node; } /* Init the new entry */ Node->OwnerId = OwnerId; Node->Type = (UINT8) Type; ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%4.4s (%s) [Node %p Owner %3.3X] added to %4.4s (%s) [Node %p]\n", AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type), Node, OwnerId, AcpiUtGetNodeName (ParentNode), AcpiUtGetTypeName (ParentNode->Type), ParentNode)); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiNsDeleteChildren * * PARAMETERS: ParentNode - Delete this objects children * * RETURN: None. * * DESCRIPTION: Delete all children of the parent object. In other words, * deletes a "scope". * ******************************************************************************/ void AcpiNsDeleteChildren ( ACPI_NAMESPACE_NODE *ParentNode) { ACPI_NAMESPACE_NODE *NextNode; ACPI_NAMESPACE_NODE *NodeToDelete; ACPI_FUNCTION_TRACE_PTR (NsDeleteChildren, ParentNode); if (!ParentNode) { return_VOID; } /* Deallocate all children at this level */ NextNode = ParentNode->Child; while (NextNode) { /* Grandchildren should have all been deleted already */ if (NextNode->Child) { ACPI_ERROR ((AE_INFO, "Found a grandchild! P=%p C=%p", ParentNode, NextNode)); } /* * Delete this child node and move on to the next child in the list. * No need to unlink the node since we are deleting the entire branch. */ NodeToDelete = NextNode; NextNode = NextNode->Peer; AcpiNsDeleteNode (NodeToDelete); } /* Clear the parent's child pointer */ ParentNode->Child = NULL; return_VOID; } /******************************************************************************* * * FUNCTION: AcpiNsDeleteNamespaceSubtree * * PARAMETERS: ParentNode - 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 AcpiNsDeleteNamespaceSubtree ( ACPI_NAMESPACE_NODE *ParentNode) { ACPI_NAMESPACE_NODE *ChildNode = NULL; UINT32 Level = 1; ACPI_STATUS Status; ACPI_FUNCTION_TRACE (NsDeleteNamespaceSubtree); if (!ParentNode) { return_VOID; } /* Lock namespace for possible update */ Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { 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) */ ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode); if (ChildNode) { /* Found a child node - detach any attached object */ AcpiNsDetachObject (ChildNode); /* Check if this node has any children */ if (ChildNode->Child) { /* * There is at least one child of this node, * visit the node */ Level++; ParentNode = ChildNode; ChildNode = 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. */ AcpiNsDeleteChildren (ParentNode); /* New "last child" is this parent node */ ChildNode = ParentNode; /* Move up the tree to the grandparent */ ParentNode = ParentNode->Parent; } } (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_VOID; } /******************************************************************************* * * FUNCTION: AcpiNsDeleteNamespaceByOwner * * PARAMETERS: OwnerId - 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. * * MUTEX: Locks namespace during deletion walk. * ******************************************************************************/ void AcpiNsDeleteNamespaceByOwner ( ACPI_OWNER_ID OwnerId) { ACPI_NAMESPACE_NODE *ChildNode; ACPI_NAMESPACE_NODE *DeletionNode; ACPI_NAMESPACE_NODE *ParentNode; UINT32 Level; ACPI_STATUS Status; ACPI_FUNCTION_TRACE_U32 (NsDeleteNamespaceByOwner, OwnerId); if (OwnerId == 0) { return_VOID; } /* Lock namespace for possible update */ Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_VOID; } DeletionNode = NULL; ParentNode = AcpiGbl_RootNode; ChildNode = 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 ChildNode is NULL, * the first child of the parent is returned */ ChildNode = AcpiNsGetNextNode (ParentNode, ChildNode); if (DeletionNode) { AcpiNsDeleteChildren (DeletionNode); AcpiNsRemoveNode (DeletionNode); DeletionNode = NULL; } if (ChildNode) { if (ChildNode->OwnerId == OwnerId) { /* Found a matching child node - detach any attached object */ AcpiNsDetachObject (ChildNode); } /* Check if this node has any children */ if (ChildNode->Child) { /* * There is at least one child of this node, * visit the node */ Level++; ParentNode = ChildNode; ChildNode = NULL; } else if (ChildNode->OwnerId == OwnerId) { DeletionNode = ChildNode; } } else { /* * No more children of this parent node. * Move up to the grandparent. */ Level--; if (Level != 0) { if (ParentNode->OwnerId == OwnerId) { DeletionNode = ParentNode; } } /* New "last child" is this parent node */ ChildNode = ParentNode; /* Move up the tree to the grandparent */ ParentNode = ParentNode->Parent; } } (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return_VOID; }