2008-09-28 11:26:17 +04:00
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/******************************************************************************
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*
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* Module Name: nspredef - Validation of ACPI predefined methods and objects
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*
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*****************************************************************************/
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/*
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2017-02-08 06:00:08 +03:00
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* Copyright (C) 2000 - 2017, Intel Corp.
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2008-09-28 11:26:17 +04:00
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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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2009-08-13 10:30:16 +04:00
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#define ACPI_CREATE_PREDEFINED_TABLE
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2008-09-28 11:26:17 +04:00
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#include <acpi/acpi.h>
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2009-01-09 08:30:03 +03:00
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acpredef.h"
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2008-09-28 11:26:17 +04:00
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nspredef")
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/*******************************************************************************
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*
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* This module validates predefined ACPI objects that appear in the namespace,
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* at the time they are evaluated (via acpi_evaluate_object). The purpose of this
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* validation is to detect problems with BIOS-exposed predefined ACPI objects
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* before the results are returned to the ACPI-related drivers.
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*
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* There are several areas that are validated:
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*
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* 1) The number of input arguments as defined by the method/object in the
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2013-05-30 06:00:01 +04:00
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* ASL is validated against the ACPI specification.
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2008-09-28 11:26:17 +04:00
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* 2) The type of the return object (if any) is validated against the ACPI
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2013-05-30 06:00:01 +04:00
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* specification.
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2008-09-28 11:26:17 +04:00
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* 3) For returned package objects, the count of package elements is
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2013-05-30 06:00:01 +04:00
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* validated, as well as the type of each package element. Nested
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* packages are supported.
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2008-09-28 11:26:17 +04:00
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*
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* For any problems found, a warning message is issued.
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*
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******************************************************************************/
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/* Local prototypes */
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static acpi_status
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2013-05-30 06:00:01 +04:00
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acpi_ns_check_reference(struct acpi_evaluate_info *info,
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2008-09-28 11:26:17 +04:00
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union acpi_operand_object *return_object);
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2013-03-08 13:23:03 +04:00
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static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object);
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2008-09-28 11:26:17 +04:00
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/*******************************************************************************
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*
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2013-05-30 06:00:01 +04:00
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* FUNCTION: acpi_ns_check_return_value
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2008-09-28 11:26:17 +04:00
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*
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2012-07-12 05:40:10 +04:00
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* PARAMETERS: node - Namespace node for the method/object
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2013-05-30 06:00:01 +04:00
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* info - Method execution information block
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2009-06-24 09:38:02 +04:00
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* user_param_count - Number of parameters actually passed
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* return_status - Status from the object evaluation
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2008-11-14 03:44:39 +03:00
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* return_object_ptr - Pointer to the object returned from the
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* evaluation of a method or object
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2008-09-28 11:26:17 +04:00
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*
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* RETURN: Status
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*
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2013-05-30 06:00:01 +04:00
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* DESCRIPTION: Check the value returned from a predefined name.
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2008-09-28 11:26:17 +04:00
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*
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******************************************************************************/
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acpi_status
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2013-05-30 06:00:01 +04:00
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acpi_ns_check_return_value(struct acpi_namespace_node *node,
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struct acpi_evaluate_info *info,
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u32 user_param_count,
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acpi_status return_status,
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union acpi_operand_object **return_object_ptr)
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2008-09-28 11:26:17 +04:00
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{
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2013-05-30 06:00:01 +04:00
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acpi_status status;
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2008-09-28 11:26:17 +04:00
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const union acpi_predefined_info *predefined;
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2008-11-13 06:19:24 +03:00
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/* If not a predefined name, we cannot validate the return object */
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2013-05-30 06:00:53 +04:00
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predefined = info->predefined;
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2008-11-13 06:19:24 +03:00
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if (!predefined) {
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2013-05-30 06:00:01 +04:00
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return (AE_OK);
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2008-11-13 06:19:24 +03:00
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}
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/*
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2009-06-24 09:38:02 +04:00
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* If the method failed or did not actually return an object, we cannot
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* validate the return object
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2008-09-28 11:26:17 +04:00
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*/
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2009-06-24 09:38:02 +04:00
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if ((return_status != AE_OK) && (return_status != AE_CTRL_RETURN_VALUE)) {
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2013-05-30 06:00:01 +04:00
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return (AE_OK);
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2008-11-13 06:19:24 +03:00
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}
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2008-09-28 11:26:17 +04:00
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/*
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2011-07-04 12:24:03 +04:00
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* Return value validation and possible repair.
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2009-09-03 05:55:40 +04:00
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*
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2011-07-04 12:24:03 +04:00
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* 1) Don't perform return value validation/repair if this feature
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* has been disabled via a global option.
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*
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* 2) We have a return value, but if one wasn't expected, just exit,
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* this is not a problem. For example, if the "Implicit Return"
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* feature is enabled, methods will always return a value.
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*
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* 3) If the return value can be of any type, then we cannot perform
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* any validation, just exit.
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2008-09-28 11:26:17 +04:00
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*/
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2011-07-04 12:24:03 +04:00
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if (acpi_gbl_disable_auto_repair ||
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(!predefined->info.expected_btypes) ||
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2009-09-03 05:55:40 +04:00
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(predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
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2013-05-30 06:00:01 +04:00
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return (AE_OK);
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2008-09-28 11:26:17 +04:00
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}
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/*
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2009-12-11 10:26:13 +03:00
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* Check that the type of the main return object is what is expected
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* for this predefined name
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2008-09-28 11:26:17 +04:00
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*/
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2013-05-30 06:00:01 +04:00
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status = acpi_ns_check_object_type(info, return_object_ptr,
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2008-09-28 11:26:17 +04:00
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predefined->info.expected_btypes,
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2009-06-24 09:38:02 +04:00
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ACPI_NOT_PACKAGE_ELEMENT);
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2009-12-11 10:26:13 +03:00
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if (ACPI_FAILURE(status)) {
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goto exit;
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}
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2013-08-08 11:29:38 +04:00
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/*
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*
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* 4) If there is no return value and it is optional, just return
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* AE_OK (_WAK).
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*/
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if (!(*return_object_ptr)) {
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goto exit;
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}
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2009-12-11 10:26:13 +03:00
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/*
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* For returned Package objects, check the type of all sub-objects.
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* Note: Package may have been newly created by call above.
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*/
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if ((*return_object_ptr)->common.type == ACPI_TYPE_PACKAGE) {
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2013-05-30 06:00:01 +04:00
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info->parent_package = *return_object_ptr;
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status = acpi_ns_check_package(info, return_object_ptr);
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2009-12-11 10:26:13 +03:00
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if (ACPI_FAILURE(status)) {
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2013-06-08 05:01:01 +04:00
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2013-06-08 05:01:07 +04:00
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/* We might be able to fix some errors */
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2013-06-08 05:01:01 +04:00
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2013-06-08 05:01:07 +04:00
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if ((status != AE_AML_OPERAND_TYPE) &&
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(status != AE_AML_OPERAND_VALUE)) {
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2013-06-08 05:01:01 +04:00
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goto exit;
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}
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2009-12-11 09:53:11 +03:00
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}
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2008-09-28 11:26:17 +04:00
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}
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2009-11-12 04:44:06 +03:00
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/*
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2009-12-11 10:26:13 +03:00
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* The return object was OK, or it was successfully repaired above.
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* Now make some additional checks such as verifying that package
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* objects are sorted correctly (if required) or buffer objects have
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* the correct data width (bytes vs. dwords). These repairs are
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* performed on a per-name basis, i.e., the code is specific to
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* particular predefined names.
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2009-11-12 04:44:06 +03:00
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*/
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2013-05-30 06:00:01 +04:00
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status = acpi_ns_complex_repairs(info, node, status, return_object_ptr);
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2009-11-12 04:44:06 +03:00
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2009-12-11 10:26:13 +03:00
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exit:
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2009-06-24 09:38:02 +04:00
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/*
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* If the object validation failed or if we successfully repaired one
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* or more objects, mark the parent node to suppress further warning
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* messages during the next evaluation of the same method/object.
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*/
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2013-05-30 06:00:01 +04:00
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if (ACPI_FAILURE(status) || (info->return_flags & ACPI_OBJECT_REPAIRED)) {
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2009-06-24 09:38:02 +04:00
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node->flags |= ANOBJ_EVALUATED;
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}
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2008-09-28 11:26:17 +04:00
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_object_type
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*
|
2013-05-30 06:00:01 +04:00
|
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* PARAMETERS: info - Method execution information block
|
2008-11-14 03:44:39 +03:00
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* return_object_ptr - Pointer to the object returned from the
|
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* evaluation of a method or object
|
2008-09-28 11:26:17 +04:00
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* expected_btypes - Bitmap of expected return type(s)
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* package_index - Index of object within parent package (if
|
2009-06-24 09:38:02 +04:00
|
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
|
2008-09-28 11:26:17 +04:00
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check the type of the return object against the expected object
|
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* type(s). Use of Btype allows multiple expected object types.
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*
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******************************************************************************/
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|
|
2013-01-11 16:08:51 +04:00
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acpi_status
|
2013-05-30 06:00:01 +04:00
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acpi_ns_check_object_type(struct acpi_evaluate_info *info,
|
2008-11-14 03:44:39 +03:00
|
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union acpi_operand_object **return_object_ptr,
|
2008-09-28 11:26:17 +04:00
|
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u32 expected_btypes, u32 package_index)
|
|
|
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{
|
2008-11-14 03:44:39 +03:00
|
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union acpi_operand_object *return_object = *return_object_ptr;
|
2008-09-28 11:26:17 +04:00
|
|
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acpi_status status = AE_OK;
|
2015-10-19 05:24:58 +03:00
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char type_buffer[96]; /* Room for 10 types */
|
2008-09-28 11:26:17 +04:00
|
|
|
|
|
|
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/* A Namespace node should not get here, but make sure */
|
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
if (return_object &&
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ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
|
2013-05-30 06:00:01 +04:00
|
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
|
|
|
info->node_flags,
|
2009-06-24 09:38:02 +04:00
|
|
|
"Invalid return type - Found a Namespace node [%4.4s] type %s",
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|
|
|
return_object->node.name.ascii,
|
|
|
|
acpi_ut_get_type_name(return_object->node.
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|
|
|
type)));
|
2008-09-28 11:26:17 +04:00
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
|
|
|
|
* The bitmapped type allows multiple possible return types.
|
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|
|
*
|
|
|
|
* Note, the cases below must handle all of the possible types returned
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|
|
|
* from all of the predefined names (including elements of returned
|
|
|
|
* packages)
|
|
|
|
*/
|
2013-05-30 06:00:01 +04:00
|
|
|
info->return_btype = acpi_ns_get_bitmapped_type(return_object);
|
|
|
|
if (info->return_btype == ACPI_RTYPE_ANY) {
|
2008-09-28 11:26:17 +04:00
|
|
|
|
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|
|
/* Not one of the supported objects, must be incorrect */
|
|
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|
goto type_error_exit;
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|
|
|
}
|
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
/* For reference objects, check that the reference type is correct */
|
2010-01-21 04:08:31 +03:00
|
|
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|
2013-05-30 06:00:01 +04:00
|
|
|
if ((info->return_btype & expected_btypes) == ACPI_RTYPE_REFERENCE) {
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|
|
|
status = acpi_ns_check_reference(info, return_object);
|
2010-01-21 04:08:31 +03:00
|
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return (status);
|
2008-09-28 11:26:17 +04:00
|
|
|
}
|
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
/* Attempt simple repair of the returned object if necessary */
|
2008-09-28 11:26:17 +04:00
|
|
|
|
2013-05-30 06:00:01 +04:00
|
|
|
status = acpi_ns_simple_repair(info, expected_btypes,
|
2010-01-21 04:08:31 +03:00
|
|
|
package_index, return_object_ptr);
|
2013-05-30 06:00:01 +04:00
|
|
|
if (ACPI_SUCCESS(status)) {
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|
|
|
return (AE_OK); /* Successful repair */
|
|
|
|
}
|
2008-09-28 11:26:17 +04:00
|
|
|
|
2013-10-29 05:30:02 +04:00
|
|
|
type_error_exit:
|
2008-09-28 11:26:17 +04:00
|
|
|
|
|
|
|
/* Create a string with all expected types for this predefined object */
|
|
|
|
|
2013-04-12 04:24:22 +04:00
|
|
|
acpi_ut_get_expected_return_types(type_buffer, expected_btypes);
|
2008-09-28 11:26:17 +04:00
|
|
|
|
2013-08-08 11:29:38 +04:00
|
|
|
if (!return_object) {
|
|
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
|
|
|
info->node_flags,
|
|
|
|
"Expected return object of type %s",
|
|
|
|
type_buffer));
|
|
|
|
} else if (package_index == ACPI_NOT_PACKAGE_ELEMENT) {
|
2013-05-30 06:00:01 +04:00
|
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
|
|
|
info->node_flags,
|
2009-06-24 09:38:02 +04:00
|
|
|
"Return type mismatch - found %s, expected %s",
|
|
|
|
acpi_ut_get_object_type_name
|
|
|
|
(return_object), type_buffer));
|
2008-09-28 11:26:17 +04:00
|
|
|
} else {
|
2013-05-30 06:00:01 +04:00
|
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
|
|
|
|
info->node_flags,
|
2009-06-24 09:38:02 +04:00
|
|
|
"Return Package type mismatch at index %u - "
|
|
|
|
"found %s, expected %s", package_index,
|
|
|
|
acpi_ut_get_object_type_name
|
|
|
|
(return_object), type_buffer));
|
2008-09-28 11:26:17 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ns_check_reference
|
|
|
|
*
|
2013-05-30 06:00:01 +04:00
|
|
|
* PARAMETERS: info - Method execution information block
|
2008-09-28 11:26:17 +04:00
|
|
|
* return_object - Object returned from the evaluation of a
|
|
|
|
* method or object
|
|
|
|
*
|
|
|
|
* RETURN: Status
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Check a returned reference object for the correct reference
|
|
|
|
* type. The only reference type that can be returned from a
|
|
|
|
* predefined method is a named reference. All others are invalid.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
static acpi_status
|
2013-05-30 06:00:01 +04:00
|
|
|
acpi_ns_check_reference(struct acpi_evaluate_info *info,
|
2008-09-28 11:26:17 +04:00
|
|
|
union acpi_operand_object *return_object)
|
|
|
|
{
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check the reference object for the correct reference type (opcode).
|
|
|
|
* The only type of reference that can be converted to an union acpi_object is
|
|
|
|
* a reference to a named object (reference class: NAME)
|
|
|
|
*/
|
|
|
|
if (return_object->reference.class == ACPI_REFCLASS_NAME) {
|
|
|
|
return (AE_OK);
|
|
|
|
}
|
|
|
|
|
2013-05-30 06:00:01 +04:00
|
|
|
ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname, info->node_flags,
|
2009-06-24 09:38:02 +04:00
|
|
|
"Return type mismatch - unexpected reference object type [%s] %2.2X",
|
|
|
|
acpi_ut_get_reference_name(return_object),
|
|
|
|
return_object->reference.class));
|
2008-09-28 11:26:17 +04:00
|
|
|
|
|
|
|
return (AE_AML_OPERAND_TYPE);
|
|
|
|
}
|
2008-11-14 03:44:39 +03:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
/*******************************************************************************
|
|
|
|
*
|
|
|
|
* FUNCTION: acpi_ns_get_bitmapped_type
|
|
|
|
*
|
|
|
|
* PARAMETERS: return_object - Object returned from method/obj evaluation
|
|
|
|
*
|
|
|
|
* RETURN: Object return type. ACPI_RTYPE_ANY indicates that the object
|
|
|
|
* type is not supported. ACPI_RTYPE_NONE indicates that no
|
|
|
|
* object was returned (return_object is NULL).
|
|
|
|
*
|
|
|
|
* DESCRIPTION: Convert object type into a bitmapped object return type.
|
|
|
|
*
|
|
|
|
******************************************************************************/
|
|
|
|
|
|
|
|
static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object)
|
|
|
|
{
|
|
|
|
u32 return_btype;
|
|
|
|
|
|
|
|
if (!return_object) {
|
|
|
|
return (ACPI_RTYPE_NONE);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Map acpi_object_type to internal bitmapped type */
|
|
|
|
|
|
|
|
switch (return_object->common.type) {
|
|
|
|
case ACPI_TYPE_INTEGER:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
return_btype = ACPI_RTYPE_INTEGER;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_TYPE_BUFFER:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
return_btype = ACPI_RTYPE_BUFFER;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_TYPE_STRING:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
return_btype = ACPI_RTYPE_STRING;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
return_btype = ACPI_RTYPE_PACKAGE;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
return_btype = ACPI_RTYPE_REFERENCE;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
2013-06-08 04:58:14 +04:00
|
|
|
|
2013-03-08 13:23:03 +04:00
|
|
|
/* Not one of the supported objects, must be incorrect */
|
|
|
|
|
|
|
|
return_btype = ACPI_RTYPE_ANY;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
return (return_btype);
|
|
|
|
}
|