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ACPICA: Add repair for predefined methods that must return sorted lists
This change will repair (by sorting) packages returned by _ALR, _PSS, and _TSS. Drivers can now assume that the packages are correctly sorted. Adds one new file, nsrepair2.c. ACPICA BZ 784. http://www.acpica.org/bugzilla/show_bug.cgi?id=784 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore
Len Brown
parent
419a909dd1
commit
ad5babeed8
@ -28,7 +28,7 @@ acpi-$(ACPI_FUTURE_USAGE) += hwtimer.o
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acpi-y += nsaccess.o nsload.o nssearch.o nsxfeval.o \
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nsalloc.o nseval.o nsnames.o nsutils.o nsxfname.o \
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nsdump.o nsinit.o nsobject.o nswalk.o nsxfobj.o \
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nsparse.o nspredef.o nsrepair.o
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nsparse.o nspredef.o nsrepair.o nsrepair2.o
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acpi-$(ACPI_FUTURE_USAGE) += nsdumpdv.o
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@ -273,7 +273,8 @@ acpi_ns_get_attached_data(struct acpi_namespace_node *node,
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acpi_object_handler handler, void **data);
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/*
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* nsrepair - return object repair for predefined methods/objects
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* nsrepair - General return object repair for all
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* predefined methods/objects
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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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@ -285,6 +286,16 @@ acpi_status
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acpi_ns_repair_package_list(struct acpi_predefined_data *data,
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union acpi_operand_object **obj_desc_ptr);
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/*
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* nsrepair2 - Return object repair for specific
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* predefined methods/objects
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*/
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acpi_status
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acpi_ns_complex_repairs(struct acpi_predefined_data *data,
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struct acpi_namespace_node *node,
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acpi_status validate_status,
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union acpi_operand_object **return_object_ptr);
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/*
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* nssearch - Namespace searching and entry
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*/
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@ -232,6 +232,12 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
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status = acpi_ns_check_package(data, return_object_ptr);
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}
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/*
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* Perform additional, more complicated repairs on a per-name
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* basis.
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*/
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status = acpi_ns_complex_repairs(data, node, status, return_object_ptr);
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check_validation_status:
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/*
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* If the object validation failed or if we successfully repaired one
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540
drivers/acpi/acpica/nsrepair2.c
Normal file
540
drivers/acpi/acpica/nsrepair2.c
Normal file
@ -0,0 +1,540 @@
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/******************************************************************************
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*
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* Module Name: nsrepair2 - Repair for objects returned by specific
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* predefined methods
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2009, 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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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsrepair2")
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/*
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* Information structure and handler for ACPI predefined names that can
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* be repaired on a per-name basis.
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*/
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typedef
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acpi_status(*acpi_repair_function) (struct acpi_predefined_data *data,
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union acpi_operand_object **return_object_ptr);
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typedef struct acpi_repair_info {
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char name[ACPI_NAME_SIZE];
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acpi_repair_function repair_function;
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} acpi_repair_info;
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/* Local prototypes */
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static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
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acpi_namespace_node
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*node);
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static acpi_status
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acpi_ns_repair_ALR(struct acpi_predefined_data *data,
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union acpi_operand_object **return_object_ptr);
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static acpi_status
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acpi_ns_repair_PSS(struct acpi_predefined_data *data,
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union acpi_operand_object **return_object_ptr);
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static acpi_status
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acpi_ns_repair_TSS(struct acpi_predefined_data *data,
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union acpi_operand_object **return_object_ptr);
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static acpi_status
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acpi_ns_check_sorted_list(struct acpi_predefined_data *data,
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union acpi_operand_object *return_object,
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u32 expected_count,
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u32 sort_index,
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u8 sort_direction, char *sort_key_name);
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static acpi_status
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acpi_ns_remove_null_elements(union acpi_operand_object *package);
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static acpi_status
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acpi_ns_sort_list(union acpi_operand_object **elements,
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u32 count, u32 index, u8 sort_direction);
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/* Values for sort_direction above */
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#define ACPI_SORT_ASCENDING 0
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#define ACPI_SORT_DESCENDING 1
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/*
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* This table contains the names of the predefined methods for which we can
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* perform more complex repairs.
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*
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* _ALR: Sort the list ascending by ambient_illuminance if necessary
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* _PSS: Sort the list descending by Power if necessary
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* _TSS: Sort the list descending by Power if necessary
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*/
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static const struct acpi_repair_info acpi_ns_repairable_names[] = {
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{"_ALR", acpi_ns_repair_ALR},
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{"_PSS", acpi_ns_repair_PSS},
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{"_TSS", acpi_ns_repair_TSS},
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{{0, 0, 0, 0}, NULL} /* Table terminator */
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};
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/******************************************************************************
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*
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* FUNCTION: acpi_ns_complex_repairs
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* Node - Namespace node for the method/object
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* validate_status - Original status of earlier validation
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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. If name is not
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* matched, validate_status is returned.
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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_complex_repairs(struct acpi_predefined_data *data,
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struct acpi_namespace_node *node,
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acpi_status validate_status,
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union acpi_operand_object **return_object_ptr)
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{
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const struct acpi_repair_info *predefined;
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acpi_status status;
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/* Check if this name is in the list of repairable names */
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predefined = acpi_ns_match_repairable_name(node);
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if (!predefined) {
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return (validate_status);
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}
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status = predefined->repair_function(data, return_object_ptr);
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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_match_repairable_name
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*
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* PARAMETERS: Node - Namespace node for the method/object
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*
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* RETURN: Pointer to entry in repair table. NULL indicates not found.
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*
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* DESCRIPTION: Check an object name against the repairable object list.
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*
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*****************************************************************************/
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static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
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acpi_namespace_node
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*node)
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{
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const struct acpi_repair_info *this_name;
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/* Search info table for a repairable predefined method/object name */
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this_name = acpi_ns_repairable_names;
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while (this_name->repair_function) {
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if (ACPI_COMPARE_NAME(node->name.ascii, this_name->name)) {
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return (this_name);
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}
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this_name++;
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}
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return (NULL); /* Not found */
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_ns_repair_ALR
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*
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* PARAMETERS: Data - Pointer to validation data structure
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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 object is OK or was repaired successfully
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*
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* DESCRIPTION: Repair for the _ALR object. If necessary, sort the object list
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* ascending by the ambient illuminance values.
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*
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*****************************************************************************/
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static acpi_status
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acpi_ns_repair_ALR(struct acpi_predefined_data *data,
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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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acpi_status status;
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status = acpi_ns_check_sorted_list(data, return_object, 2, 1,
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ACPI_SORT_ASCENDING,
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"AmbientIlluminance");
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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_repair_TSS
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*
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* PARAMETERS: Data - Pointer to validation data structure
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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 object is OK or was repaired successfully
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*
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* DESCRIPTION: Repair for the _TSS object. If necessary, sort the object list
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* descending by the power dissipation values.
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*
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*****************************************************************************/
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static acpi_status
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acpi_ns_repair_TSS(struct acpi_predefined_data *data,
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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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acpi_status status;
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status = acpi_ns_check_sorted_list(data, return_object, 5, 1,
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ACPI_SORT_DESCENDING,
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"PowerDissipation");
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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_repair_PSS
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*
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* PARAMETERS: Data - Pointer to validation data structure
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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 object is OK or was repaired successfully
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*
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* DESCRIPTION: Repair for the _PSS object. If necessary, sort the object list
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* by the CPU frequencies. Check that the power dissipation values
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* are all proportional to CPU frequency (i.e., sorting by
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* frequency should be the same as sorting by power.)
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*
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*****************************************************************************/
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static acpi_status
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acpi_ns_repair_PSS(struct acpi_predefined_data *data,
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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 **outer_elements;
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u32 outer_element_count;
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union acpi_operand_object **elements;
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union acpi_operand_object *obj_desc;
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u32 previous_value;
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acpi_status status;
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u32 i;
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/*
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* Entries (sub-packages) in the _PSS Package must be sorted by power
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* dissipation, in descending order. If it appears that the list is
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* incorrectly sorted, sort it. We sort by cpu_frequency, since this
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* should be proportional to the power.
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*/
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status = acpi_ns_check_sorted_list(data, return_object, 6, 0,
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ACPI_SORT_DESCENDING,
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"CpuFrequency");
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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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* We now know the list is correctly sorted by CPU frequency. Check if
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* the power dissipation values are proportional.
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*/
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previous_value = ACPI_UINT32_MAX;
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outer_elements = return_object->package.elements;
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outer_element_count = return_object->package.count;
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for (i = 0; i < outer_element_count; i++) {
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elements = (*outer_elements)->package.elements;
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obj_desc = elements[1]; /* Index1 = power_dissipation */
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if ((u32) obj_desc->integer.value > previous_value) {
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ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
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data->node_flags,
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"SubPackage[%u,%u] - suspicious power dissipation values",
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i - 1, i));
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}
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previous_value = (u32) obj_desc->integer.value;
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outer_elements++;
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}
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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_check_sorted_list
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*
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* PARAMETERS: Data - Pointer to validation data structure
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* return_object - Pointer to the top-level returned object
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* expected_count - Minimum length of each sub-package
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* sort_index - Sub-package entry to sort on
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* sort_direction - Ascending or descending
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* sort_key_name - Name of the sort_index field
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*
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* RETURN: Status. AE_OK if the list is valid and is sorted correctly or
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* has been repaired by sorting the list.
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*
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* DESCRIPTION: Check if the package list is valid and sorted correctly by the
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* sort_index. If not, then sort the list.
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*
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*****************************************************************************/
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static acpi_status
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acpi_ns_check_sorted_list(struct acpi_predefined_data *data,
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union acpi_operand_object *return_object,
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u32 expected_count,
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u32 sort_index,
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u8 sort_direction, char *sort_key_name)
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{
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u32 outer_element_count;
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union acpi_operand_object **outer_elements;
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union acpi_operand_object **elements;
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union acpi_operand_object *obj_desc;
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u32 i;
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u32 previous_value;
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acpi_status status;
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/* The top-level object must be a package */
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if (return_object->common.type != ACPI_TYPE_PACKAGE) {
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return (AE_AML_OPERAND_TYPE);
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}
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/*
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* Detect any NULL package elements and remove them from the
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* package.
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*
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* TBD: We may want to do this for all predefined names that
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* return a variable-length package of packages.
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*/
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status = acpi_ns_remove_null_elements(return_object);
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if (status == AE_NULL_ENTRY) {
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ACPI_INFO_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
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"NULL elements removed from package"));
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/* Exit if package is now zero length */
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if (!return_object->package.count) {
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return (AE_NULL_ENTRY);
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}
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}
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outer_elements = return_object->package.elements;
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outer_element_count = return_object->package.count;
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if (!outer_element_count) {
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return (AE_AML_PACKAGE_LIMIT);
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}
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previous_value = 0;
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if (sort_direction == ACPI_SORT_DESCENDING) {
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previous_value = ACPI_UINT32_MAX;
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}
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/* Examine each subpackage */
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for (i = 0; i < outer_element_count; i++) {
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/* Each element of the top-level package must also be a package */
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if ((*outer_elements)->common.type != ACPI_TYPE_PACKAGE) {
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return (AE_AML_OPERAND_TYPE);
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}
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/* Each sub-package must have the minimum length */
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if ((*outer_elements)->package.count < expected_count) {
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return (AE_AML_PACKAGE_LIMIT);
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}
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elements = (*outer_elements)->package.elements;
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obj_desc = elements[sort_index];
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if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
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return (AE_AML_OPERAND_TYPE);
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}
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/*
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* The list must be sorted in the specified order. If we detect a
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* discrepancy, issue a warning and sort the entire list
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*/
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if (((sort_direction == ACPI_SORT_ASCENDING) &&
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(obj_desc->integer.value < previous_value)) ||
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((sort_direction == ACPI_SORT_DESCENDING) &&
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(obj_desc->integer.value > previous_value))) {
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status =
|
||||
acpi_ns_sort_list(return_object->package.elements,
|
||||
outer_element_count, sort_index,
|
||||
sort_direction);
|
||||
if (ACPI_FAILURE(status)) {
|
||||
return (status);
|
||||
}
|
||||
|
||||
data->flags |= ACPI_OBJECT_REPAIRED;
|
||||
|
||||
ACPI_INFO_PREDEFINED((AE_INFO, data->pathname,
|
||||
data->node_flags,
|
||||
"Repaired unsorted list - now sorted by %s",
|
||||
sort_key_name));
|
||||
return (AE_OK);
|
||||
}
|
||||
|
||||
previous_value = (u32) obj_desc->integer.value;
|
||||
outer_elements++;
|
||||
}
|
||||
|
||||
return (AE_OK);
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
*
|
||||
* FUNCTION: acpi_ns_remove_null_elements
|
||||
*
|
||||
* PARAMETERS: obj_desc - A Package object
|
||||
*
|
||||
* RETURN: Status. AE_NULL_ENTRY means that one or more elements were
|
||||
* removed.
|
||||
*
|
||||
* DESCRIPTION: Remove all NULL package elements and update the package count.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
static acpi_status
|
||||
acpi_ns_remove_null_elements(union acpi_operand_object *obj_desc)
|
||||
{
|
||||
union acpi_operand_object **source;
|
||||
union acpi_operand_object **dest;
|
||||
acpi_status status = AE_OK;
|
||||
u32 count;
|
||||
u32 new_count;
|
||||
u32 i;
|
||||
|
||||
count = obj_desc->package.count;
|
||||
new_count = count;
|
||||
|
||||
source = obj_desc->package.elements;
|
||||
dest = source;
|
||||
|
||||
/* Examine all elements of the package object */
|
||||
|
||||
for (i = 0; i < count; i++) {
|
||||
if (!*source) {
|
||||
status = AE_NULL_ENTRY;
|
||||
new_count--;
|
||||
} else {
|
||||
*dest = *source;
|
||||
dest++;
|
||||
}
|
||||
source++;
|
||||
}
|
||||
|
||||
if (status == AE_NULL_ENTRY) {
|
||||
|
||||
/* NULL terminate list and update the package count */
|
||||
|
||||
*dest = NULL;
|
||||
obj_desc->package.count = new_count;
|
||||
}
|
||||
|
||||
return (status);
|
||||
}
|
||||
|
||||
/******************************************************************************
|
||||
*
|
||||
* FUNCTION: acpi_ns_sort_list
|
||||
*
|
||||
* PARAMETERS: Elements - Package object element list
|
||||
* Count - Element count for above
|
||||
* Index - Sort by which package element
|
||||
* sort_direction - Ascending or Descending sort
|
||||
*
|
||||
* RETURN: Status
|
||||
*
|
||||
* DESCRIPTION: Sort the objects that are in a package element list.
|
||||
*
|
||||
* NOTE: Assumes that all NULL elements have been removed from the package.
|
||||
*
|
||||
*****************************************************************************/
|
||||
|
||||
static acpi_status
|
||||
acpi_ns_sort_list(union acpi_operand_object **elements,
|
||||
u32 count, u32 index, u8 sort_direction)
|
||||
{
|
||||
union acpi_operand_object *obj_desc1;
|
||||
union acpi_operand_object *obj_desc2;
|
||||
union acpi_operand_object *temp_obj;
|
||||
u32 i;
|
||||
u32 j;
|
||||
|
||||
/* Simple bubble sort */
|
||||
|
||||
for (i = 1; i < count; i++) {
|
||||
for (j = (count - 1); j >= i; j--) {
|
||||
obj_desc1 = elements[j - 1]->package.elements[index];
|
||||
obj_desc2 = elements[j]->package.elements[index];
|
||||
|
||||
if (((sort_direction == ACPI_SORT_ASCENDING) &&
|
||||
(obj_desc1->integer.value >
|
||||
obj_desc2->integer.value))
|
||||
|| ((sort_direction == ACPI_SORT_DESCENDING)
|
||||
&& (obj_desc1->integer.value <
|
||||
obj_desc2->integer.value))) {
|
||||
temp_obj = elements[j - 1];
|
||||
elements[j - 1] = elements[j];
|
||||
elements[j] = temp_obj;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return (AE_OK);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user