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ACPICA: Add mechanism for early object repairs on a per-name basis 

Adds the framework to allow object repairs very early in the
return object analysis. Enables repairs like string->unicode,
etc. Bob Moore, Lv Zheng.

Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2013-03-08 09:23:03 +00:00 committed by Rafael J. Wysocki
parent 6be58e2f21
commit d5a36100f6
5 changed files with 221 additions and 87 deletions
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15
drivers/acpi/acpica/aclocal.h
View File

@ -363,6 +363,7 @@ struct acpi_predefined_data {
union acpi_operand_object *parent_package;
struct acpi_namespace_node *node;
u32 flags;
u32 return_btype;
u8 node_flags;
};
@ -371,6 +372,20 @@ struct acpi_predefined_data {
#define ACPI_OBJECT_REPAIRED 1
#define ACPI_OBJECT_WRAPPED 2
/* Return object auto-repair info */
typedef acpi_status(*acpi_object_converter) (union acpi_operand_object
*original_object,
union acpi_operand_object
**converted_object);
struct acpi_simple_repair_info {
char name[ACPI_NAME_SIZE];
u32 unexpected_btypes;
u32 package_index;
acpi_object_converter object_converter;
};
/*
* Bitmapped return value types
* Note: the actual data types must be contiguous, a loop in nspredef.c

2
drivers/acpi/acpica/acnamesp.h
View File

@ -289,7 +289,7 @@ acpi_ns_get_attached_data(struct acpi_namespace_node *node,
* predefined methods/objects
*/
acpi_status
acpi_ns_repair_object(struct acpi_predefined_data *data,
acpi_ns_simple_repair(struct acpi_predefined_data *data,
u32 expected_btypes,
u32 package_index,
union acpi_operand_object **return_object_ptr);

141
drivers/acpi/acpica/nspredef.c
View File

@ -78,6 +78,8 @@ acpi_ns_check_reference(struct acpi_predefined_data *data,
static void acpi_ns_get_expected_types(char *buffer, u32 expected_btypes);
static u32 acpi_ns_get_bitmapped_type(union acpi_operand_object *return_object);
/*
* Names for the types that can be returned by the predefined objects.
* Used for warning messages. Must be in the same order as the ACPI_RTYPEs
@ -112,7 +114,6 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
acpi_status return_status,
union acpi_operand_object **return_object_ptr)
{
union acpi_operand_object *return_object = *return_object_ptr;
acpi_status status = AE_OK;
const union acpi_predefined_info *predefined;
char *pathname;
@ -151,25 +152,6 @@ acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
goto cleanup;
}
/*
* If there is no return value, check if we require a return value for
* this predefined name. Either one return value is expected, or none,
* for both methods and other objects.
*
* Exit now if there is no return object. Warning if one was expected.
*/
if (!return_object) {
if ((predefined->info.expected_btypes) &&
(!(predefined->info.expected_btypes & ACPI_RTYPE_NONE))) {
ACPI_WARN_PREDEFINED((AE_INFO, pathname,
ACPI_WARN_ALWAYS,
"Missing expected return value"));
status = AE_AML_NO_RETURN_VALUE;
}
goto cleanup;
}
/*
* Return value validation and possible repair.
*
@ -410,28 +392,12 @@ acpi_ns_check_object_type(struct acpi_predefined_data *data,
{
union acpi_operand_object *return_object = *return_object_ptr;
acpi_status status = AE_OK;
u32 return_btype;
char type_buffer[48]; /* Room for 5 types */
/*
* If we get a NULL return_object here, it is a NULL package element.
* Since all extraneous NULL package elements were removed earlier by a
* call to acpi_ns_remove_null_elements, this is an unexpected NULL element.
* We will attempt to repair it.
*/
if (!return_object) {
status = acpi_ns_repair_null_element(data, expected_btypes,
package_index,
return_object_ptr);
if (ACPI_SUCCESS(status)) {
return (AE_OK); /* Repair was successful */
}
goto type_error_exit;
}
/* A Namespace node should not get here, but make sure */
if (ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
if (return_object &&
ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
"Invalid return type - Found a Namespace node [%4.4s] type %s",
return_object->node.name.ascii,
@ -448,53 +414,25 @@ acpi_ns_check_object_type(struct acpi_predefined_data *data,
* from all of the predefined names (including elements of returned
* packages)
*/
switch (return_object->common.type) {
case ACPI_TYPE_INTEGER:
return_btype = ACPI_RTYPE_INTEGER;
break;
data->return_btype = acpi_ns_get_bitmapped_type(return_object);
if (data->return_btype == ACPI_RTYPE_ANY) {
case ACPI_TYPE_BUFFER:
return_btype = ACPI_RTYPE_BUFFER;
break;
case ACPI_TYPE_STRING:
return_btype = ACPI_RTYPE_STRING;
break;
case ACPI_TYPE_PACKAGE:
return_btype = ACPI_RTYPE_PACKAGE;
break;
case ACPI_TYPE_LOCAL_REFERENCE:
return_btype = ACPI_RTYPE_REFERENCE;
break;
default:
/* Not one of the supported objects, must be incorrect */
goto type_error_exit;
}
/* Is the object one of the expected types? */
if (return_btype & expected_btypes) {
/* For reference objects, check that the reference type is correct */
if (return_object->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
status = acpi_ns_check_reference(data, return_object);
}
/* For reference objects, check that the reference type is correct */
if ((data->return_btype & expected_btypes) == ACPI_RTYPE_REFERENCE) {
status = acpi_ns_check_reference(data, return_object);
return (status);
}
/* Type mismatch -- attempt repair of the returned object */
/* Attempt simple repair of the returned object if necessary */
status = acpi_ns_repair_object(data, expected_btypes,
status = acpi_ns_simple_repair(data, expected_btypes,
package_index, return_object_ptr);
if (ACPI_SUCCESS(status)) {
return (AE_OK); /* Repair was successful */
}
return (status);
type_error_exit:
@ -556,6 +494,61 @@ acpi_ns_check_reference(struct acpi_predefined_data *data,
return (AE_AML_OPERAND_TYPE);
}
/*******************************************************************************
*
* 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:
return_btype = ACPI_RTYPE_INTEGER;
break;
case ACPI_TYPE_BUFFER:
return_btype = ACPI_RTYPE_BUFFER;
break;
case ACPI_TYPE_STRING:
return_btype = ACPI_RTYPE_STRING;
break;
case ACPI_TYPE_PACKAGE:
return_btype = ACPI_RTYPE_PACKAGE;
break;
case ACPI_TYPE_LOCAL_REFERENCE:
return_btype = ACPI_RTYPE_REFERENCE;
break;
default:
/* Not one of the supported objects, must be incorrect */
return_btype = ACPI_RTYPE_ANY;
break;
}
return (return_btype);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_get_expected_types

134
drivers/acpi/acpica/nsrepair.c
View File

@ -46,6 +46,7 @@
#include "acnamesp.h"
#include "acinterp.h"
#include "acpredef.h"
#include "amlresrc.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME("nsrepair")
@ -71,6 +72,11 @@ ACPI_MODULE_NAME("nsrepair")
* Buffer -> String
* Buffer -> Package of Integers
* Package -> Package of one Package
*
* Additional conversions that are available:
* Convert a null return or zero return value to an end_tag descriptor
* Convert an ASCII string to a Unicode buffer
*
* An incorrect standalone object is wrapped with required outer package
*
* Additional possible repairs:
@ -90,9 +96,26 @@ static acpi_status
acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
union acpi_operand_object **return_object);
static const struct acpi_simple_repair_info *acpi_ns_match_simple_repair(struct
acpi_namespace_node
*node,
u32
return_btype,
u32
package_index);
/*
* Special but simple repairs for some names.
*
* 2nd argument: Unexpected types that can be repaired
*/
static const struct acpi_simple_repair_info acpi_object_repair_info[] = {
{{0, 0, 0, 0}, 0, 0, NULL} /* Table terminator */
};
/*******************************************************************************
*
* FUNCTION: acpi_ns_repair_object
* FUNCTION: acpi_ns_simple_repair
*
* PARAMETERS: data - Pointer to validation data structure
* expected_btypes - Object types expected
@ -110,16 +133,54 @@ acpi_ns_convert_to_buffer(union acpi_operand_object *original_object,
******************************************************************************/
acpi_status
acpi_ns_repair_object(struct acpi_predefined_data *data,
acpi_ns_simple_repair(struct acpi_predefined_data *data,
u32 expected_btypes,
u32 package_index,
union acpi_operand_object **return_object_ptr)
{
union acpi_operand_object *return_object = *return_object_ptr;
union acpi_operand_object *new_object;
union acpi_operand_object *new_object = NULL;
acpi_status status;
const struct acpi_simple_repair_info *predefined;
ACPI_FUNCTION_NAME(ns_repair_object);
ACPI_FUNCTION_NAME(ns_simple_repair);
/*
* Special repairs for certain names that are in the repair table.
* Check if this name is in the list of repairable names.
*/
predefined = acpi_ns_match_simple_repair(data->node,
data->return_btype,
package_index);
if (predefined) {
if (!return_object) {
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
ACPI_WARN_ALWAYS,
"Missing expected return value"));
}
status =
predefined->object_converter(return_object, &new_object);
if (ACPI_FAILURE(status)) {
/* A fatal error occurred during a conversion */
ACPI_EXCEPTION((AE_INFO, status,
"During return object analysis"));
return (status);
}
if (new_object) {
goto object_repaired;
}
}
/*
* Do not perform simple object repair unless the return type is not
* expected.
*/
if (data->return_btype & expected_btypes) {
return (AE_OK);
}
/*
* At this point, we know that the type of the returned object was not
@ -127,6 +188,24 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
* repair the object by converting it to one of the expected object
* types for this predefined name.
*/
/*
* If there is no return value, check if we require a return value for
* this predefined name. Either one return value is expected, or none,
* for both methods and other objects.
*
* Exit now if there is no return object. Warning if one was expected.
*/
if (!return_object) {
if (expected_btypes && (!(expected_btypes & ACPI_RTYPE_NONE))) {
ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
ACPI_WARN_ALWAYS,
"Missing expected return value"));
return (AE_AML_NO_RETURN_VALUE);
}
}
if (expected_btypes & ACPI_RTYPE_INTEGER) {
status = acpi_ns_convert_to_integer(return_object, &new_object);
if (ACPI_SUCCESS(status)) {
@ -216,6 +295,53 @@ acpi_ns_repair_object(struct acpi_predefined_data *data,
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: acpi_ns_match_simple_repair
*
* PARAMETERS: node - Namespace node for the method/object
* return_btype - Object type that was returned
* package_index - Index of object within parent package (if
* applicable - ACPI_NOT_PACKAGE_ELEMENT
* otherwise)
*
* RETURN: Pointer to entry in repair table. NULL indicates not found.
*
* DESCRIPTION: Check an object name against the repairable object list.
*
*****************************************************************************/
static const struct acpi_simple_repair_info *acpi_ns_match_simple_repair(struct
acpi_namespace_node
*node,
u32
return_btype,
u32
package_index)
{
const struct acpi_simple_repair_info *this_name;
/* Search info table for a repairable predefined method/object name */
this_name = acpi_object_repair_info;
while (this_name->object_converter) {
if (ACPI_COMPARE_NAME(node->name.ascii, this_name->name)) {
/* Check if we can actually repair this name/type combination */
if ((return_btype & this_name->unexpected_btypes) &&
(package_index == this_name->package_index)) {
return (this_name);
}
return (NULL);
}
this_name++;
}
return (NULL); /* Name was not found in the repair table */
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_convert_to_integer

16
drivers/acpi/acpica/nsrepair2.c
View File

@ -66,9 +66,9 @@ typedef struct acpi_repair_info {
/* Local prototypes */
static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
acpi_namespace_node
*node);
static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct
acpi_namespace_node
*node);
static acpi_status
acpi_ns_repair_ALR(struct acpi_predefined_data *data,
@ -175,7 +175,7 @@ acpi_ns_complex_repairs(struct acpi_predefined_data *data,
/* Check if this name is in the list of repairable names */
predefined = acpi_ns_match_repairable_name(node);
predefined = acpi_ns_match_complex_repair(node);
if (!predefined) {
return (validate_status);
}
@ -186,7 +186,7 @@ acpi_ns_complex_repairs(struct acpi_predefined_data *data,
/******************************************************************************
*
* FUNCTION: acpi_ns_match_repairable_name
* FUNCTION: acpi_ns_match_complex_repair
*
* PARAMETERS: node - Namespace node for the method/object
*
@ -196,9 +196,9 @@ acpi_ns_complex_repairs(struct acpi_predefined_data *data,
*
*****************************************************************************/
static const struct acpi_repair_info *acpi_ns_match_repairable_name(struct
acpi_namespace_node
*node)
static const struct acpi_repair_info *acpi_ns_match_complex_repair(struct
acpi_namespace_node
*node)
{
const struct acpi_repair_info *this_name;