diff options
Diffstat (limited to 'usr/src/common/acpica/namespace/nsalloc.c')
| -rw-r--r-- | usr/src/common/acpica/namespace/nsalloc.c | 595 |
1 files changed, 595 insertions, 0 deletions
diff --git a/usr/src/common/acpica/namespace/nsalloc.c b/usr/src/common/acpica/namespace/nsalloc.c new file mode 100644 index 0000000000..72a974f5b4 --- /dev/null +++ b/usr/src/common/acpica/namespace/nsalloc.c @@ -0,0 +1,595 @@ +/******************************************************************************* + * + * Module Name: nsalloc - Namespace allocation and deletion utilities + * + ******************************************************************************/ + +/* + * Copyright (C) 2000 - 2016, 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.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); + + + /* 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 %X] 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; +} |