316 lines
8.4 KiB
C
316 lines
8.4 KiB
C
|
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
||
|
|
/******************************************************************************
|
||
|
|
*
|
||
|
|
* Module Name: uteval - Object evaluation
|
||
|
|
*
|
||
|
|
* Copyright (C) 2000 - 2018, Intel Corp.
|
||
|
|
*
|
||
|
|
*****************************************************************************/
|
||
|
|
|
||
|
|
#include <acpi/acpi.h>
|
||
|
|
#include "accommon.h"
|
||
|
|
#include "acnamesp.h"
|
||
|
|
|
||
|
|
#define _COMPONENT ACPI_UTILITIES
|
||
|
|
ACPI_MODULE_NAME("uteval")
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_evaluate_object
|
||
|
|
*
|
||
|
|
* PARAMETERS: prefix_node - Starting node
|
||
|
|
* path - Path to object from starting node
|
||
|
|
* expected_return_types - Bitmap of allowed return types
|
||
|
|
* return_desc - Where a return value is stored
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Evaluates a namespace object and verifies the type of the
|
||
|
|
* return object. Common code that simplifies accessing objects
|
||
|
|
* that have required return objects of fixed types.
|
||
|
|
*
|
||
|
|
* NOTE: Internal function, no parameter validation
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ut_evaluate_object(struct acpi_namespace_node *prefix_node,
|
||
|
|
const char *path,
|
||
|
|
u32 expected_return_btypes,
|
||
|
|
union acpi_operand_object **return_desc)
|
||
|
|
{
|
||
|
|
struct acpi_evaluate_info *info;
|
||
|
|
acpi_status status;
|
||
|
|
u32 return_btype;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_evaluate_object);
|
||
|
|
|
||
|
|
/* Allocate the evaluation information block */
|
||
|
|
|
||
|
|
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
|
||
|
|
if (!info) {
|
||
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
||
|
|
}
|
||
|
|
|
||
|
|
info->prefix_node = prefix_node;
|
||
|
|
info->relative_pathname = path;
|
||
|
|
|
||
|
|
/* Evaluate the object/method */
|
||
|
|
|
||
|
|
status = acpi_ns_evaluate(info);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
if (status == AE_NOT_FOUND) {
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
||
|
|
"[%4.4s.%s] was not found\n",
|
||
|
|
acpi_ut_get_node_name(prefix_node),
|
||
|
|
path));
|
||
|
|
} else {
|
||
|
|
ACPI_ERROR_METHOD("Method execution failed",
|
||
|
|
prefix_node, path, status);
|
||
|
|
}
|
||
|
|
|
||
|
|
goto cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Did we get a return object? */
|
||
|
|
|
||
|
|
if (!info->return_object) {
|
||
|
|
if (expected_return_btypes) {
|
||
|
|
ACPI_ERROR_METHOD("No object was returned from",
|
||
|
|
prefix_node, path, AE_NOT_EXIST);
|
||
|
|
|
||
|
|
status = AE_NOT_EXIST;
|
||
|
|
}
|
||
|
|
|
||
|
|
goto cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Map the return object type to the bitmapped type */
|
||
|
|
|
||
|
|
switch ((info->return_object)->common.type) {
|
||
|
|
case ACPI_TYPE_INTEGER:
|
||
|
|
|
||
|
|
return_btype = ACPI_BTYPE_INTEGER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_BUFFER:
|
||
|
|
|
||
|
|
return_btype = ACPI_BTYPE_BUFFER;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_STRING:
|
||
|
|
|
||
|
|
return_btype = ACPI_BTYPE_STRING;
|
||
|
|
break;
|
||
|
|
|
||
|
|
case ACPI_TYPE_PACKAGE:
|
||
|
|
|
||
|
|
return_btype = ACPI_BTYPE_PACKAGE;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
|
||
|
|
return_btype = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((acpi_gbl_enable_interpreter_slack) && (!expected_return_btypes)) {
|
||
|
|
/*
|
||
|
|
* We received a return object, but one was not expected. This can
|
||
|
|
* happen frequently if the "implicit return" feature is enabled.
|
||
|
|
* Just delete the return object and return AE_OK.
|
||
|
|
*/
|
||
|
|
acpi_ut_remove_reference(info->return_object);
|
||
|
|
goto cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Is the return object one of the expected types? */
|
||
|
|
|
||
|
|
if (!(expected_return_btypes & return_btype)) {
|
||
|
|
ACPI_ERROR_METHOD("Return object type is incorrect",
|
||
|
|
prefix_node, path, AE_TYPE);
|
||
|
|
|
||
|
|
ACPI_ERROR((AE_INFO,
|
||
|
|
"Type returned from %s was incorrect: %s, expected Btypes: 0x%X",
|
||
|
|
path,
|
||
|
|
acpi_ut_get_object_type_name(info->return_object),
|
||
|
|
expected_return_btypes));
|
||
|
|
|
||
|
|
/* On error exit, we must delete the return object */
|
||
|
|
|
||
|
|
acpi_ut_remove_reference(info->return_object);
|
||
|
|
status = AE_TYPE;
|
||
|
|
goto cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Object type is OK, return it */
|
||
|
|
|
||
|
|
*return_desc = info->return_object;
|
||
|
|
|
||
|
|
cleanup:
|
||
|
|
ACPI_FREE(info);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_evaluate_numeric_object
|
||
|
|
*
|
||
|
|
* PARAMETERS: object_name - Object name to be evaluated
|
||
|
|
* device_node - Node for the device
|
||
|
|
* value - Where the value is returned
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Evaluates a numeric namespace object for a selected device
|
||
|
|
* and stores result in *Value.
|
||
|
|
*
|
||
|
|
* NOTE: Internal function, no parameter validation
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ut_evaluate_numeric_object(const char *object_name,
|
||
|
|
struct acpi_namespace_node *device_node,
|
||
|
|
u64 *value)
|
||
|
|
{
|
||
|
|
union acpi_operand_object *obj_desc;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_evaluate_numeric_object);
|
||
|
|
|
||
|
|
status = acpi_ut_evaluate_object(device_node, object_name,
|
||
|
|
ACPI_BTYPE_INTEGER, &obj_desc);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the returned Integer */
|
||
|
|
|
||
|
|
*value = obj_desc->integer.value;
|
||
|
|
|
||
|
|
/* On exit, we must delete the return object */
|
||
|
|
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_execute_STA
|
||
|
|
*
|
||
|
|
* PARAMETERS: device_node - Node for the device
|
||
|
|
* flags - Where the status flags are returned
|
||
|
|
*
|
||
|
|
* RETURN: Status
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Executes _STA for selected device and stores results in
|
||
|
|
* *Flags. If _STA does not exist, then the device is assumed
|
||
|
|
* to be present/functional/enabled (as per the ACPI spec).
|
||
|
|
*
|
||
|
|
* NOTE: Internal function, no parameter validation
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ut_execute_STA(struct acpi_namespace_node *device_node, u32 * flags)
|
||
|
|
{
|
||
|
|
union acpi_operand_object *obj_desc;
|
||
|
|
acpi_status status;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_execute_STA);
|
||
|
|
|
||
|
|
status = acpi_ut_evaluate_object(device_node, METHOD_NAME__STA,
|
||
|
|
ACPI_BTYPE_INTEGER, &obj_desc);
|
||
|
|
if (ACPI_FAILURE(status)) {
|
||
|
|
if (AE_NOT_FOUND == status) {
|
||
|
|
/*
|
||
|
|
* if _STA does not exist, then (as per the ACPI specification),
|
||
|
|
* the returned flags will indicate that the device is present,
|
||
|
|
* functional, and enabled.
|
||
|
|
*/
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
||
|
|
"_STA on %4.4s was not found, assuming device is present\n",
|
||
|
|
acpi_ut_get_node_name(device_node)));
|
||
|
|
|
||
|
|
*flags = ACPI_UINT32_MAX;
|
||
|
|
status = AE_OK;
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Extract the status flags */
|
||
|
|
|
||
|
|
*flags = (u32) obj_desc->integer.value;
|
||
|
|
|
||
|
|
/* On exit, we must delete the return object */
|
||
|
|
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
return_ACPI_STATUS(status);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*******************************************************************************
|
||
|
|
*
|
||
|
|
* FUNCTION: acpi_ut_execute_power_methods
|
||
|
|
*
|
||
|
|
* PARAMETERS: device_node - Node for the device
|
||
|
|
* method_names - Array of power method names
|
||
|
|
* method_count - Number of methods to execute
|
||
|
|
* out_values - Where the power method values are returned
|
||
|
|
*
|
||
|
|
* RETURN: Status, out_values
|
||
|
|
*
|
||
|
|
* DESCRIPTION: Executes the specified power methods for the device and returns
|
||
|
|
* the result(s).
|
||
|
|
*
|
||
|
|
* NOTE: Internal function, no parameter validation
|
||
|
|
*
|
||
|
|
******************************************************************************/
|
||
|
|
|
||
|
|
acpi_status
|
||
|
|
acpi_ut_execute_power_methods(struct acpi_namespace_node *device_node,
|
||
|
|
const char **method_names,
|
||
|
|
u8 method_count, u8 *out_values)
|
||
|
|
{
|
||
|
|
union acpi_operand_object *obj_desc;
|
||
|
|
acpi_status status;
|
||
|
|
acpi_status final_status = AE_NOT_FOUND;
|
||
|
|
u32 i;
|
||
|
|
|
||
|
|
ACPI_FUNCTION_TRACE(ut_execute_power_methods);
|
||
|
|
|
||
|
|
for (i = 0; i < method_count; i++) {
|
||
|
|
/*
|
||
|
|
* Execute the power method (_sx_d or _sx_w). The only allowable
|
||
|
|
* return type is an Integer.
|
||
|
|
*/
|
||
|
|
status = acpi_ut_evaluate_object(device_node,
|
||
|
|
ACPI_CAST_PTR(char,
|
||
|
|
method_names[i]),
|
||
|
|
ACPI_BTYPE_INTEGER, &obj_desc);
|
||
|
|
if (ACPI_SUCCESS(status)) {
|
||
|
|
out_values[i] = (u8)obj_desc->integer.value;
|
||
|
|
|
||
|
|
/* Delete the return object */
|
||
|
|
|
||
|
|
acpi_ut_remove_reference(obj_desc);
|
||
|
|
final_status = AE_OK; /* At least one value is valid */
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
out_values[i] = ACPI_UINT8_MAX;
|
||
|
|
if (status == AE_NOT_FOUND) {
|
||
|
|
continue; /* Ignore if not found */
|
||
|
|
}
|
||
|
|
|
||
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
||
|
|
"Failed %s on Device %4.4s, %s\n",
|
||
|
|
ACPI_CAST_PTR(char, method_names[i]),
|
||
|
|
acpi_ut_get_node_name(device_node),
|
||
|
|
acpi_format_exception(status)));
|
||
|
|
}
|
||
|
|
|
||
|
|
return_ACPI_STATUS(final_status);
|
||
|
|
}
|