![Bob Moore](/assets/img/avatar_default.png)
Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers that do not allow the initialization of address pointers within packed structures - even though the hardware itself may support misaligned transfers. Some of the debug data structures are packed by default to minimize size. Added an error message for the case where acpi_os_get_thread_id() returns zero. A non-zero value is required by the core ACPICA code to ensure the proper operation of AML mutexes and recursive control methods. The DSDT is now the only ACPI table that determines whether the AML interpreter is in 32-bit or 64-bit mode. Not really a functional change, but the hooks for per-table 32/64 switching have been removed from the code. A clarification to the ACPI specification is forthcoming in ACPI 3.0B. Fixed a possible leak of an Owner ID in the error path of tbinstal.c acpi_tb_init_table_descriptor() and migrated all table OwnerID deletion to a single place in acpi_tb_uninstall_table() to correct possible leaks when using the acpi_tb_delete_tables_by_type() interface (with assistance from Lance Ortiz.) Fixed a problem with Serialized control methods where the semaphore associated with the method could be over-signaled after multiple method invocations. Fixed two issues with the locking of the internal namespace data structure. Both the Unload() operator and acpi_unload_table() interface now lock the namespace during the namespace deletion associated with the table unload (with assistance from Linn Crosetto.) Fixed problem reports (Valery Podrezov) integrated: - Eliminate unnecessary memory allocation for CreateXxxxField http://bugzilla.kernel.org/show_bug.cgi?id=5426 Fixed problem reports (Fiodor Suietov) integrated: - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369) - On Address Space handler deletion, needless deactivation call (BZ 374) - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 375) - Possible memory leak, Notify sub-objects of Processor, Power, ThermalZone (BZ 376) - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378) - Minimum Length of RSDT should be validated (BZ 379) - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no Handler (BZ (380) - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type loaded (BZ 381) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
254 lines
7.6 KiB
C
254 lines
7.6 KiB
C
/******************************************************************************
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*
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* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
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* Address Spaces.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2006, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acevents.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evxfregn")
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/*******************************************************************************
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*
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* FUNCTION: acpi_install_address_space_handler
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*
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* PARAMETERS: Device - Handle for the device
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* space_id - The address space ID
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* Handler - Address of the handler
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* Setup - Address of the setup function
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* Context - Value passed to the handler on each access
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for all op_regions of a given space_id.
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*
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******************************************************************************/
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acpi_status
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acpi_install_address_space_handler(acpi_handle device,
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acpi_adr_space_type space_id,
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acpi_adr_space_handler handler,
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acpi_adr_space_setup setup, void *context)
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{
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struct acpi_namespace_node *node;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_install_address_space_handler);
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/* Parameter validation */
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if (!device) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node(device);
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if (!node) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Install the handler for all Regions for this Space ID */
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status =
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acpi_ev_install_space_handler(node, space_id, handler, setup,
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context);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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/* Run all _REG methods for this address space */
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status = acpi_ev_execute_reg_methods(node, space_id);
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_install_address_space_handler)
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/*******************************************************************************
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*
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* FUNCTION: acpi_remove_address_space_handler
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*
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* PARAMETERS: Device - Handle for the device
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* space_id - The address space ID
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a previously installed handler.
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*
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******************************************************************************/
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acpi_status
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acpi_remove_address_space_handler(acpi_handle device,
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acpi_adr_space_type space_id,
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acpi_adr_space_handler handler)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *handler_obj;
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union acpi_operand_object *region_obj;
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union acpi_operand_object **last_obj_ptr;
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struct acpi_namespace_node *node;
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_remove_address_space_handler);
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/* Parameter validation */
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if (!device) {
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Convert and validate the device handle */
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node = acpi_ns_map_handle_to_node(device);
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if (!node ||
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((node->type != ACPI_TYPE_DEVICE) &&
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(node->type != ACPI_TYPE_PROCESSOR) &&
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(node->type != ACPI_TYPE_THERMAL) &&
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(node != acpi_gbl_root_node))) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Make sure the internal object exists */
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obj_desc = acpi_ns_get_attached_object(node);
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if (!obj_desc) {
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status = AE_NOT_EXIST;
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goto unlock_and_exit;
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}
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/* Find the address handler the user requested */
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handler_obj = obj_desc->device.handler;
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last_obj_ptr = &obj_desc->device.handler;
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while (handler_obj) {
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/* We have a handler, see if user requested this one */
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if (handler_obj->address_space.space_id == space_id) {
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/* Handler must be the same as the installed handler */
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if (handler_obj->address_space.handler != handler) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Matched space_id, first dereference this in the Regions */
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Removing address handler %p(%p) for region %s on Device %p(%p)\n",
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handler_obj, handler,
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acpi_ut_get_region_name(space_id),
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node, obj_desc));
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region_obj = handler_obj->address_space.region_list;
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/* Walk the handler's region list */
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while (region_obj) {
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/*
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* First disassociate the handler from the region.
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*
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* NOTE: this doesn't mean that the region goes away
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* The region is just inaccessible as indicated to
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* the _REG method
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*/
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acpi_ev_detach_region(region_obj, TRUE);
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/*
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* Walk the list: Just grab the head because the
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* detach_region removed the previous head.
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*/
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region_obj =
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handler_obj->address_space.region_list;
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}
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/* Remove this Handler object from the list */
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*last_obj_ptr = handler_obj->address_space.next;
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/* Now we can delete the handler object */
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acpi_ut_remove_reference(handler_obj);
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goto unlock_and_exit;
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}
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/* Walk the linked list of handlers */
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last_obj_ptr = &handler_obj->address_space.next;
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handler_obj = handler_obj->address_space.next;
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}
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/* The handler does not exist */
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ACPI_DEBUG_PRINT((ACPI_DB_OPREGION,
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"Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
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handler, acpi_ut_get_region_name(space_id), space_id,
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node, obj_desc));
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status = AE_NOT_EXIST;
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_remove_address_space_handler)
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