682 lines
18 KiB
C
682 lines
18 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: utobject - ACPI object create/delete/size/cache routines
|
|
*
|
|
* Copyright (C) 2000 - 2018, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acnamesp.h"
|
|
|
|
#define _COMPONENT ACPI_UTILITIES
|
|
ACPI_MODULE_NAME("utobject")
|
|
|
|
/* Local prototypes */
|
|
static acpi_status
|
|
acpi_ut_get_simple_object_size(union acpi_operand_object *obj,
|
|
acpi_size *obj_length);
|
|
|
|
static acpi_status
|
|
acpi_ut_get_package_object_size(union acpi_operand_object *obj,
|
|
acpi_size *obj_length);
|
|
|
|
static acpi_status
|
|
acpi_ut_get_element_length(u8 object_type,
|
|
union acpi_operand_object *source_object,
|
|
union acpi_generic_state *state, void *context);
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_internal_object_dbg
|
|
*
|
|
* PARAMETERS: module_name - Source file name of caller
|
|
* line_number - Line number of caller
|
|
* component_id - Component type of caller
|
|
* type - ACPI Type of the new object
|
|
*
|
|
* RETURN: A new internal object, null on failure
|
|
*
|
|
* DESCRIPTION: Create and initialize a new internal object.
|
|
*
|
|
* NOTE: We always allocate the worst-case object descriptor because
|
|
* these objects are cached, and we want them to be
|
|
* one-size-satisifies-any-request. This in itself may not be
|
|
* the most memory efficient, but the efficiency of the object
|
|
* cache should more than make up for this!
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *acpi_ut_create_internal_object_dbg(const char
|
|
*module_name,
|
|
u32 line_number,
|
|
u32 component_id,
|
|
acpi_object_type
|
|
type)
|
|
{
|
|
union acpi_operand_object *object;
|
|
union acpi_operand_object *second_object;
|
|
|
|
ACPI_FUNCTION_TRACE_STR(ut_create_internal_object_dbg,
|
|
acpi_ut_get_type_name(type));
|
|
|
|
/* Allocate the raw object descriptor */
|
|
|
|
object =
|
|
acpi_ut_allocate_object_desc_dbg(module_name, line_number,
|
|
component_id);
|
|
if (!object) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
switch (type) {
|
|
case ACPI_TYPE_REGION:
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
|
|
/* These types require a secondary object */
|
|
|
|
second_object =
|
|
acpi_ut_allocate_object_desc_dbg(module_name, line_number,
|
|
component_id);
|
|
if (!second_object) {
|
|
acpi_ut_delete_object_desc(object);
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
second_object->common.type = ACPI_TYPE_LOCAL_EXTRA;
|
|
second_object->common.reference_count = 1;
|
|
|
|
/* Link the second object to the first */
|
|
|
|
object->common.next_object = second_object;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* All others have no secondary object */
|
|
break;
|
|
}
|
|
|
|
/* Save the object type in the object descriptor */
|
|
|
|
object->common.type = (u8) type;
|
|
|
|
/* Init the reference count */
|
|
|
|
object->common.reference_count = 1;
|
|
|
|
/* Any per-type initialization should go here */
|
|
|
|
return_PTR(object);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_package_object
|
|
*
|
|
* PARAMETERS: count - Number of package elements
|
|
*
|
|
* RETURN: Pointer to a new Package object, null on failure
|
|
*
|
|
* DESCRIPTION: Create a fully initialized package object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *acpi_ut_create_package_object(u32 count)
|
|
{
|
|
union acpi_operand_object *package_desc;
|
|
union acpi_operand_object **package_elements;
|
|
|
|
ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count);
|
|
|
|
/* Create a new Package object */
|
|
|
|
package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
|
|
if (!package_desc) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/*
|
|
* Create the element array. Count+1 allows the array to be null
|
|
* terminated.
|
|
*/
|
|
package_elements = ACPI_ALLOCATE_ZEROED(((acpi_size)count +
|
|
1) * sizeof(void *));
|
|
if (!package_elements) {
|
|
ACPI_FREE(package_desc);
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
package_desc->package.count = count;
|
|
package_desc->package.elements = package_elements;
|
|
return_PTR(package_desc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_integer_object
|
|
*
|
|
* PARAMETERS: initial_value - Initial value for the integer
|
|
*
|
|
* RETURN: Pointer to a new Integer object, null on failure
|
|
*
|
|
* DESCRIPTION: Create an initialized integer object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *acpi_ut_create_integer_object(u64 initial_value)
|
|
{
|
|
union acpi_operand_object *integer_desc;
|
|
|
|
ACPI_FUNCTION_TRACE(ut_create_integer_object);
|
|
|
|
/* Create and initialize a new integer object */
|
|
|
|
integer_desc = acpi_ut_create_internal_object(ACPI_TYPE_INTEGER);
|
|
if (!integer_desc) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
integer_desc->integer.value = initial_value;
|
|
return_PTR(integer_desc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_buffer_object
|
|
*
|
|
* PARAMETERS: buffer_size - Size of buffer to be created
|
|
*
|
|
* RETURN: Pointer to a new Buffer object, null on failure
|
|
*
|
|
* DESCRIPTION: Create a fully initialized buffer object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
|
|
{
|
|
union acpi_operand_object *buffer_desc;
|
|
u8 *buffer = NULL;
|
|
|
|
ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size);
|
|
|
|
/* Create a new Buffer object */
|
|
|
|
buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
|
|
if (!buffer_desc) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Create an actual buffer only if size > 0 */
|
|
|
|
if (buffer_size > 0) {
|
|
|
|
/* Allocate the actual buffer */
|
|
|
|
buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
|
|
if (!buffer) {
|
|
ACPI_ERROR((AE_INFO, "Could not allocate size %u",
|
|
(u32)buffer_size));
|
|
|
|
acpi_ut_remove_reference(buffer_desc);
|
|
return_PTR(NULL);
|
|
}
|
|
}
|
|
|
|
/* Complete buffer object initialization */
|
|
|
|
buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
|
|
buffer_desc->buffer.pointer = buffer;
|
|
buffer_desc->buffer.length = (u32) buffer_size;
|
|
|
|
/* Return the new buffer descriptor */
|
|
|
|
return_PTR(buffer_desc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_string_object
|
|
*
|
|
* PARAMETERS: string_size - Size of string to be created. Does not
|
|
* include NULL terminator, this is added
|
|
* automatically.
|
|
*
|
|
* RETURN: Pointer to a new String object
|
|
*
|
|
* DESCRIPTION: Create a fully initialized string object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
|
|
{
|
|
union acpi_operand_object *string_desc;
|
|
char *string;
|
|
|
|
ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size);
|
|
|
|
/* Create a new String object */
|
|
|
|
string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING);
|
|
if (!string_desc) {
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/*
|
|
* Allocate the actual string buffer -- (Size + 1) for NULL terminator.
|
|
* NOTE: Zero-length strings are NULL terminated
|
|
*/
|
|
string = ACPI_ALLOCATE_ZEROED(string_size + 1);
|
|
if (!string) {
|
|
ACPI_ERROR((AE_INFO, "Could not allocate size %u",
|
|
(u32)string_size));
|
|
|
|
acpi_ut_remove_reference(string_desc);
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Complete string object initialization */
|
|
|
|
string_desc->string.pointer = string;
|
|
string_desc->string.length = (u32) string_size;
|
|
|
|
/* Return the new string descriptor */
|
|
|
|
return_PTR(string_desc);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_valid_internal_object
|
|
*
|
|
* PARAMETERS: object - Object to be validated
|
|
*
|
|
* RETURN: TRUE if object is valid, FALSE otherwise
|
|
*
|
|
* DESCRIPTION: Validate a pointer to be of type union acpi_operand_object
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_ut_valid_internal_object(void *object)
|
|
{
|
|
|
|
ACPI_FUNCTION_NAME(ut_valid_internal_object);
|
|
|
|
/* Check for a null pointer */
|
|
|
|
if (!object) {
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
|
|
return (FALSE);
|
|
}
|
|
|
|
/* Check the descriptor type field */
|
|
|
|
switch (ACPI_GET_DESCRIPTOR_TYPE(object)) {
|
|
case ACPI_DESC_TYPE_OPERAND:
|
|
|
|
/* The object appears to be a valid union acpi_operand_object */
|
|
|
|
return (TRUE);
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"%p is not an ACPI operand obj [%s]\n",
|
|
object, acpi_ut_get_descriptor_name(object)));
|
|
break;
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_allocate_object_desc_dbg
|
|
*
|
|
* PARAMETERS: module_name - Caller's module name (for error output)
|
|
* line_number - Caller's line number (for error output)
|
|
* component_id - Caller's component ID (for error output)
|
|
*
|
|
* RETURN: Pointer to newly allocated object descriptor. Null on error
|
|
*
|
|
* DESCRIPTION: Allocate a new object descriptor. Gracefully handle
|
|
* error conditions.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void *acpi_ut_allocate_object_desc_dbg(const char *module_name,
|
|
u32 line_number, u32 component_id)
|
|
{
|
|
union acpi_operand_object *object;
|
|
|
|
ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg);
|
|
|
|
object = acpi_os_acquire_object(acpi_gbl_operand_cache);
|
|
if (!object) {
|
|
ACPI_ERROR((module_name, line_number,
|
|
"Could not allocate an object descriptor"));
|
|
|
|
return_PTR(NULL);
|
|
}
|
|
|
|
/* Mark the descriptor type */
|
|
|
|
ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND);
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
|
|
object, (u32) sizeof(union acpi_operand_object)));
|
|
|
|
return_PTR(object);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_delete_object_desc
|
|
*
|
|
* PARAMETERS: object - An Acpi internal object to be deleted
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ut_delete_object_desc(union acpi_operand_object *object)
|
|
{
|
|
ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object);
|
|
|
|
/* Object must be of type union acpi_operand_object */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"%p is not an ACPI Operand object [%s]", object,
|
|
acpi_ut_get_descriptor_name(object)));
|
|
return_VOID;
|
|
}
|
|
|
|
(void)acpi_os_release_object(acpi_gbl_operand_cache, object);
|
|
return_VOID;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_simple_object_size
|
|
*
|
|
* PARAMETERS: internal_object - An ACPI operand object
|
|
* obj_length - Where the length is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain a simple object for return to an external user.
|
|
*
|
|
* The length includes the object structure plus any additional
|
|
* needed space.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_size length;
|
|
acpi_size size;
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);
|
|
|
|
/* Start with the length of the (external) Acpi object */
|
|
|
|
length = sizeof(union acpi_object);
|
|
|
|
/* A NULL object is allowed, can be a legal uninitialized package element */
|
|
|
|
if (!internal_object) {
|
|
/*
|
|
* Object is NULL, just return the length of union acpi_object
|
|
* (A NULL union acpi_object is an object of all zeroes.)
|
|
*/
|
|
*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* A Namespace Node should never appear here */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {
|
|
|
|
/* A namespace node should never get here */
|
|
|
|
ACPI_ERROR((AE_INFO,
|
|
"Received a namespace node [%4.4s] "
|
|
"where an operand object is required",
|
|
ACPI_CAST_PTR(struct acpi_namespace_node,
|
|
internal_object)->name.ascii));
|
|
return_ACPI_STATUS(AE_AML_INTERNAL);
|
|
}
|
|
|
|
/*
|
|
* The final length depends on the object type
|
|
* Strings and Buffers are packed right up against the parent object and
|
|
* must be accessed bytewise or there may be alignment problems on
|
|
* certain processors
|
|
*/
|
|
switch (internal_object->common.type) {
|
|
case ACPI_TYPE_STRING:
|
|
|
|
length += (acpi_size)internal_object->string.length + 1;
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
length += (acpi_size)internal_object->buffer.length;
|
|
break;
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
case ACPI_TYPE_PROCESSOR:
|
|
case ACPI_TYPE_POWER:
|
|
|
|
/* No extra data for these types */
|
|
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
|
|
switch (internal_object->reference.class) {
|
|
case ACPI_REFCLASS_NAME:
|
|
/*
|
|
* Get the actual length of the full pathname to this object.
|
|
* The reference will be converted to the pathname to the object
|
|
*/
|
|
size =
|
|
acpi_ns_get_pathname_length(internal_object->
|
|
reference.node);
|
|
if (!size) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
length += ACPI_ROUND_UP_TO_NATIVE_WORD(size);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* No other reference opcodes are supported.
|
|
* Notably, Locals and Args are not supported, but this may be
|
|
* required eventually.
|
|
*/
|
|
ACPI_ERROR((AE_INFO,
|
|
"Cannot convert to external object - "
|
|
"unsupported Reference Class [%s] 0x%X in object %p",
|
|
acpi_ut_get_reference_name(internal_object),
|
|
internal_object->reference.class,
|
|
internal_object));
|
|
status = AE_TYPE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
|
|
"unsupported type [%s] 0x%X in object %p",
|
|
acpi_ut_get_object_type_name(internal_object),
|
|
internal_object->common.type, internal_object));
|
|
status = AE_TYPE;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Account for the space required by the object rounded up to the next
|
|
* multiple of the machine word size. This keeps each object aligned
|
|
* on a machine word boundary. (preventing alignment faults on some
|
|
* machines.)
|
|
*/
|
|
*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_element_length
|
|
*
|
|
* PARAMETERS: acpi_pkg_callback
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get the length of one package element.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ut_get_element_length(u8 object_type,
|
|
union acpi_operand_object *source_object,
|
|
union acpi_generic_state *state, void *context)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
|
|
acpi_size object_space;
|
|
|
|
switch (object_type) {
|
|
case ACPI_COPY_TYPE_SIMPLE:
|
|
/*
|
|
* Simple object - just get the size (Null object/entry is handled
|
|
* here also) and sum it into the running package length
|
|
*/
|
|
status =
|
|
acpi_ut_get_simple_object_size(source_object,
|
|
&object_space);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
info->length += object_space;
|
|
break;
|
|
|
|
case ACPI_COPY_TYPE_PACKAGE:
|
|
|
|
/* Package object - nothing much to do here, let the walk handle it */
|
|
|
|
info->num_packages++;
|
|
state->pkg.this_target_obj = NULL;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* No other types allowed */
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_package_object_size
|
|
*
|
|
* PARAMETERS: internal_object - An ACPI internal object
|
|
* obj_length - Where the length is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain a package object for return to an external user.
|
|
*
|
|
* This is moderately complex since a package contains other
|
|
* objects including packages.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ut_get_package_object_size(union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_pkg_info info;
|
|
|
|
ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object);
|
|
|
|
info.length = 0;
|
|
info.object_space = 0;
|
|
info.num_packages = 1;
|
|
|
|
status =
|
|
acpi_ut_walk_package_tree(internal_object, NULL,
|
|
acpi_ut_get_element_length, &info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* We have handled all of the objects in all levels of the package.
|
|
* just add the length of the package objects themselves.
|
|
* Round up to the next machine word.
|
|
*/
|
|
info.length +=
|
|
ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) *
|
|
(acpi_size)info.num_packages;
|
|
|
|
/* Return the total package length */
|
|
|
|
*obj_length = info.length;
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_object_size
|
|
*
|
|
* PARAMETERS: internal_object - An ACPI internal object
|
|
* obj_length - Where the length will be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain an object for return to an API user.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_object_size(union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
if ((ACPI_GET_DESCRIPTOR_TYPE(internal_object) ==
|
|
ACPI_DESC_TYPE_OPERAND) &&
|
|
(internal_object->common.type == ACPI_TYPE_PACKAGE)) {
|
|
status =
|
|
acpi_ut_get_package_object_size(internal_object,
|
|
obj_length);
|
|
} else {
|
|
status =
|
|
acpi_ut_get_simple_object_size(internal_object, obj_length);
|
|
}
|
|
|
|
return (status);
|
|
}
|