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![Bob Moore](/assets/img/avatar_default.png)
Includes all source headers and signons for the various tools. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
688 lines
21 KiB
C
688 lines
21 KiB
C
/******************************************************************************
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*
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* Module Name: nsrepair - Repair for objects returned by predefined methods
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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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 "accommon.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#include "acpredef.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsrepair")
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/*******************************************************************************
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*
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* This module attempts to repair or convert objects returned by the
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* predefined methods to an object type that is expected, as per the ACPI
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* specification. The need for this code is dictated by the many machines that
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* return incorrect types for the standard predefined methods. Performing these
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* conversions here, in one place, eliminates the need for individual ACPI
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* device drivers to do the same. Note: Most of these conversions are different
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* than the internal object conversion routines used for implicit object
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* conversion.
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*
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* The following conversions can be performed as necessary:
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*
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* Integer -> String
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* Integer -> Buffer
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* String -> Integer
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* String -> Buffer
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* Buffer -> Integer
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* Buffer -> String
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* Buffer -> Package of Integers
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* Package -> Package of one Package
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* An incorrect standalone object is wrapped with required outer package
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*
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* Additional possible repairs:
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* Required package elements that are NULL replaced by Integer/String/Buffer
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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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acpi_ns_convert_to_integer(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object);
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static acpi_status
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acpi_ns_convert_to_string(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object);
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static acpi_status
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acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_repair_object
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*
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* PARAMETERS: data - Pointer to validation data structure
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* expected_btypes - Object types expected
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* package_index - Index of object within parent package (if
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
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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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*
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* RETURN: Status. AE_OK if repair was successful.
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*
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* DESCRIPTION: Attempt to repair/convert a return object of a type that was
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* not expected.
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*
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******************************************************************************/
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acpi_status
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acpi_ns_repair_object(struct acpi_predefined_data *data,
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u32 expected_btypes,
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u32 package_index,
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union acpi_operand_object **return_object_ptr)
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{
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union acpi_operand_object *return_object = *return_object_ptr;
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union acpi_operand_object *new_object;
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acpi_status status;
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ACPI_FUNCTION_NAME(ns_repair_object);
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/*
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* At this point, we know that the type of the returned object was not
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* one of the expected types for this predefined name. Attempt to
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* repair the object by converting it to one of the expected object
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* types for this predefined name.
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*/
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if (expected_btypes & ACPI_RTYPE_INTEGER) {
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status = acpi_ns_convert_to_integer(return_object, &new_object);
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if (ACPI_SUCCESS(status)) {
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goto object_repaired;
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}
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}
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if (expected_btypes & ACPI_RTYPE_STRING) {
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status = acpi_ns_convert_to_string(return_object, &new_object);
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if (ACPI_SUCCESS(status)) {
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goto object_repaired;
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}
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}
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if (expected_btypes & ACPI_RTYPE_BUFFER) {
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status = acpi_ns_convert_to_buffer(return_object, &new_object);
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if (ACPI_SUCCESS(status)) {
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goto object_repaired;
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}
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}
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if (expected_btypes & ACPI_RTYPE_PACKAGE) {
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/*
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* A package is expected. We will wrap the existing object with a
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* new package object. It is often the case that if a variable-length
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* package is required, but there is only a single object needed, the
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* BIOS will return that object instead of wrapping it with a Package
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* object. Note: after the wrapping, the package will be validated
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* for correct contents (expected object type or types).
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*/
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status =
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acpi_ns_wrap_with_package(data, return_object, &new_object);
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if (ACPI_SUCCESS(status)) {
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/*
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* The original object just had its reference count
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* incremented for being inserted into the new package.
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*/
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*return_object_ptr = new_object; /* New Package object */
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data->flags |= ACPI_OBJECT_REPAIRED;
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return (AE_OK);
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}
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}
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/* We cannot repair this object */
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return (AE_AML_OPERAND_TYPE);
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object_repaired:
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/* Object was successfully repaired */
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if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
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/*
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* The original object is a package element. We need to
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* decrement the reference count of the original object,
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* for removing it from the package.
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*
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* However, if the original object was just wrapped with a
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* package object as part of the repair, we don't need to
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* change the reference count.
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*/
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if (!(data->flags & ACPI_OBJECT_WRAPPED)) {
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new_object->common.reference_count =
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return_object->common.reference_count;
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if (return_object->common.reference_count > 1) {
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return_object->common.reference_count--;
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}
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}
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ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
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"%s: Converted %s to expected %s at Package index %u\n",
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data->pathname,
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acpi_ut_get_object_type_name(return_object),
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acpi_ut_get_object_type_name(new_object),
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package_index));
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} else {
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ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
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"%s: Converted %s to expected %s\n",
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data->pathname,
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acpi_ut_get_object_type_name(return_object),
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acpi_ut_get_object_type_name(new_object)));
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}
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/* Delete old object, install the new return object */
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acpi_ut_remove_reference(return_object);
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*return_object_ptr = new_object;
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data->flags |= ACPI_OBJECT_REPAIRED;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_convert_to_integer
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*
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* PARAMETERS: original_object - Object to be converted
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* return_object - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a String/Buffer object to an Integer.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_convert_to_integer(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object)
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{
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union acpi_operand_object *new_object;
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acpi_status status;
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u64 value = 0;
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u32 i;
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switch (original_object->common.type) {
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case ACPI_TYPE_STRING:
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/* String-to-Integer conversion */
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status = acpi_ut_strtoul64(original_object->string.pointer,
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ACPI_ANY_BASE, &value);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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case ACPI_TYPE_BUFFER:
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/* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
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if (original_object->buffer.length > 8) {
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return (AE_AML_OPERAND_TYPE);
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}
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/* Extract each buffer byte to create the integer */
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for (i = 0; i < original_object->buffer.length; i++) {
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value |=
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((u64) original_object->buffer.
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pointer[i] << (i * 8));
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}
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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new_object = acpi_ut_create_integer_object(value);
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if (!new_object) {
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return (AE_NO_MEMORY);
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}
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*return_object = new_object;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_convert_to_string
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*
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* PARAMETERS: original_object - Object to be converted
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* return_object - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a Integer/Buffer object to a String.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_convert_to_string(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object)
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{
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union acpi_operand_object *new_object;
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acpi_size length;
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acpi_status status;
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switch (original_object->common.type) {
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case ACPI_TYPE_INTEGER:
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/*
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* Integer-to-String conversion. Commonly, convert
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* an integer of value 0 to a NULL string. The last element of
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* _BIF and _BIX packages occasionally need this fix.
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*/
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if (original_object->integer.value == 0) {
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/* Allocate a new NULL string object */
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new_object = acpi_ut_create_string_object(0);
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if (!new_object) {
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return (AE_NO_MEMORY);
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}
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} else {
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status =
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acpi_ex_convert_to_string(original_object,
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&new_object,
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ACPI_IMPLICIT_CONVERT_HEX);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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break;
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case ACPI_TYPE_BUFFER:
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/*
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* Buffer-to-String conversion. Use a to_string
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* conversion, no transform performed on the buffer data. The best
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* example of this is the _BIF method, where the string data from
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* the battery is often (incorrectly) returned as buffer object(s).
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*/
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length = 0;
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while ((length < original_object->buffer.length) &&
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(original_object->buffer.pointer[length])) {
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length++;
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}
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/* Allocate a new string object */
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new_object = acpi_ut_create_string_object(length);
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if (!new_object) {
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return (AE_NO_MEMORY);
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}
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/*
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* Copy the raw buffer data with no transform. String is already NULL
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* terminated at Length+1.
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*/
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ACPI_MEMCPY(new_object->string.pointer,
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original_object->buffer.pointer, length);
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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*return_object = new_object;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_convert_to_buffer
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*
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* PARAMETERS: original_object - Object to be converted
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* return_object - Where the new converted object is returned
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*
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* RETURN: Status. AE_OK if conversion was successful.
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*
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* DESCRIPTION: Attempt to convert a Integer/String/Package object to a Buffer.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
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union acpi_operand_object **return_object)
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{
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union acpi_operand_object *new_object;
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acpi_status status;
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union acpi_operand_object **elements;
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u32 *dword_buffer;
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u32 count;
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u32 i;
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switch (original_object->common.type) {
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case ACPI_TYPE_INTEGER:
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/*
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* Integer-to-Buffer conversion.
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* Convert the Integer to a packed-byte buffer. _MAT and other
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* objects need this sometimes, if a read has been performed on a
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* Field object that is less than or equal to the global integer
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* size (32 or 64 bits).
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*/
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status =
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acpi_ex_convert_to_buffer(original_object, &new_object);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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case ACPI_TYPE_STRING:
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/* String-to-Buffer conversion. Simple data copy */
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new_object =
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acpi_ut_create_buffer_object(original_object->string.
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length);
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if (!new_object) {
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return (AE_NO_MEMORY);
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}
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ACPI_MEMCPY(new_object->buffer.pointer,
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original_object->string.pointer,
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original_object->string.length);
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* This case is often seen for predefined names that must return a
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* Buffer object with multiple DWORD integers within. For example,
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* _FDE and _GTM. The Package can be converted to a Buffer.
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*/
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/* All elements of the Package must be integers */
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elements = original_object->package.elements;
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count = original_object->package.count;
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for (i = 0; i < count; i++) {
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if ((!*elements) ||
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((*elements)->common.type != ACPI_TYPE_INTEGER)) {
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return (AE_AML_OPERAND_TYPE);
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}
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elements++;
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}
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/* Create the new buffer object to replace the Package */
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new_object = acpi_ut_create_buffer_object(ACPI_MUL_4(count));
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if (!new_object) {
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return (AE_NO_MEMORY);
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}
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/* Copy the package elements (integers) to the buffer as DWORDs */
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elements = original_object->package.elements;
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dword_buffer = ACPI_CAST_PTR(u32, new_object->buffer.pointer);
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for (i = 0; i < count; i++) {
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*dword_buffer = (u32) (*elements)->integer.value;
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dword_buffer++;
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elements++;
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}
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break;
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default:
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return (AE_AML_OPERAND_TYPE);
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}
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*return_object = new_object;
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_repair_null_element
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*
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* PARAMETERS: data - Pointer to validation data structure
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* expected_btypes - Object types expected
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* package_index - Index of object within parent package (if
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* applicable - ACPI_NOT_PACKAGE_ELEMENT
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* otherwise)
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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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*
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* RETURN: Status. AE_OK if repair was successful.
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*
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* DESCRIPTION: Attempt to repair a NULL element of a returned Package object.
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*
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******************************************************************************/
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acpi_status
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acpi_ns_repair_null_element(struct acpi_predefined_data *data,
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u32 expected_btypes,
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u32 package_index,
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union acpi_operand_object **return_object_ptr)
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{
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union acpi_operand_object *return_object = *return_object_ptr;
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union acpi_operand_object *new_object;
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ACPI_FUNCTION_NAME(ns_repair_null_element);
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/* No repair needed if return object is non-NULL */
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if (return_object) {
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return (AE_OK);
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}
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/*
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* Attempt to repair a NULL element of a Package object. This applies to
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* predefined names that return a fixed-length package and each element
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* is required. It does not apply to variable-length packages where NULL
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* elements are allowed, especially at the end of the package.
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*/
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if (expected_btypes & ACPI_RTYPE_INTEGER) {
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/* Need an integer - create a zero-value integer */
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new_object = acpi_ut_create_integer_object((u64)0);
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} else if (expected_btypes & ACPI_RTYPE_STRING) {
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/* Need a string - create a NULL string */
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new_object = acpi_ut_create_string_object(0);
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} else if (expected_btypes & ACPI_RTYPE_BUFFER) {
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/* Need a buffer - create a zero-length buffer */
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new_object = acpi_ut_create_buffer_object(0);
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} else {
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/* Error for all other expected types */
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return (AE_AML_OPERAND_TYPE);
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}
|
|
|
|
if (!new_object) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Set the reference count according to the parent Package object */
|
|
|
|
new_object->common.reference_count =
|
|
data->parent_package->common.reference_count;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
|
|
"%s: Converted NULL package element to expected %s at index %u\n",
|
|
data->pathname,
|
|
acpi_ut_get_object_type_name(new_object),
|
|
package_index));
|
|
|
|
*return_object_ptr = new_object;
|
|
data->flags |= ACPI_OBJECT_REPAIRED;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_remove_null_elements
|
|
*
|
|
* PARAMETERS: data - Pointer to validation data structure
|
|
* package_type - An acpi_return_package_types value
|
|
* obj_desc - A Package object
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Remove all NULL package elements from packages that contain
|
|
* a variable number of sub-packages. For these types of
|
|
* packages, NULL elements can be safely removed.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
void
|
|
acpi_ns_remove_null_elements(struct acpi_predefined_data *data,
|
|
u8 package_type,
|
|
union acpi_operand_object *obj_desc)
|
|
{
|
|
union acpi_operand_object **source;
|
|
union acpi_operand_object **dest;
|
|
u32 count;
|
|
u32 new_count;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_NAME(ns_remove_null_elements);
|
|
|
|
/*
|
|
* We can safely remove all NULL elements from these package types:
|
|
* PTYPE1_VAR packages contain a variable number of simple data types.
|
|
* PTYPE2 packages contain a variable number of sub-packages.
|
|
*/
|
|
switch (package_type) {
|
|
case ACPI_PTYPE1_VAR:
|
|
case ACPI_PTYPE2:
|
|
case ACPI_PTYPE2_COUNT:
|
|
case ACPI_PTYPE2_PKG_COUNT:
|
|
case ACPI_PTYPE2_FIXED:
|
|
case ACPI_PTYPE2_MIN:
|
|
case ACPI_PTYPE2_REV_FIXED:
|
|
case ACPI_PTYPE2_FIX_VAR:
|
|
break;
|
|
|
|
default:
|
|
case ACPI_PTYPE1_FIXED:
|
|
case ACPI_PTYPE1_OPTION:
|
|
return;
|
|
}
|
|
|
|
count = obj_desc->package.count;
|
|
new_count = count;
|
|
|
|
source = obj_desc->package.elements;
|
|
dest = source;
|
|
|
|
/* Examine all elements of the package object, remove nulls */
|
|
|
|
for (i = 0; i < count; i++) {
|
|
if (!*source) {
|
|
new_count--;
|
|
} else {
|
|
*dest = *source;
|
|
dest++;
|
|
}
|
|
source++;
|
|
}
|
|
|
|
/* Update parent package if any null elements were removed */
|
|
|
|
if (new_count < count) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
|
|
"%s: Found and removed %u NULL elements\n",
|
|
data->pathname, (count - new_count)));
|
|
|
|
/* NULL terminate list and update the package count */
|
|
|
|
*dest = NULL;
|
|
obj_desc->package.count = new_count;
|
|
}
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ns_wrap_with_package
|
|
*
|
|
* PARAMETERS: data - Pointer to validation data structure
|
|
* original_object - Pointer to the object to repair.
|
|
* obj_desc_ptr - The new package object is returned here
|
|
*
|
|
* RETURN: Status, new object in *obj_desc_ptr
|
|
*
|
|
* DESCRIPTION: Repair a common problem with objects that are defined to
|
|
* return a variable-length Package of sub-objects. If there is
|
|
* only one sub-object, some BIOS code mistakenly simply declares
|
|
* the single object instead of a Package with one sub-object.
|
|
* This function attempts to repair this error by wrapping a
|
|
* Package object around the original object, creating the
|
|
* correct and expected Package with one sub-object.
|
|
*
|
|
* Names that can be repaired in this manner include:
|
|
* _ALR, _CSD, _HPX, _MLS, _PLD, _PRT, _PSS, _TRT, _TSS,
|
|
* _BCL, _DOD, _FIX, _Sx
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ns_wrap_with_package(struct acpi_predefined_data *data,
|
|
union acpi_operand_object *original_object,
|
|
union acpi_operand_object **obj_desc_ptr)
|
|
{
|
|
union acpi_operand_object *pkg_obj_desc;
|
|
|
|
ACPI_FUNCTION_NAME(ns_wrap_with_package);
|
|
|
|
/*
|
|
* Create the new outer package and populate it. The new package will
|
|
* have a single element, the lone sub-object.
|
|
*/
|
|
pkg_obj_desc = acpi_ut_create_package_object(1);
|
|
if (!pkg_obj_desc) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
pkg_obj_desc->package.elements[0] = original_object;
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
|
|
"%s: Wrapped %s with expected Package object\n",
|
|
data->pathname,
|
|
acpi_ut_get_object_type_name(original_object)));
|
|
|
|
/* Return the new object in the object pointer */
|
|
|
|
*obj_desc_ptr = pkg_obj_desc;
|
|
data->flags |= ACPI_OBJECT_REPAIRED | ACPI_OBJECT_WRAPPED;
|
|
return (AE_OK);
|
|
}
|