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ACPICA: Support for external package objects as method arguments
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Implemented support to allow Package objects to be passed as
method arguments to the acpi_evaluate_object interface. Previously,
this would return an AE_NOT_IMPLEMENTED exception.

Signed-off-by: Bob Moore <[email protected]>
Signed-off-by: Len Brown <[email protected]>
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@acpibob @lenb
acpibob authored and lenb committed Jun 2, 2007
1 parent 8ff6f48 commit 6287ee3
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Showing 3 changed files with 94 additions and 70 deletions.
120 changes: 50 additions & 70 deletions drivers/acpi/utilities/utcopy.c
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,10 @@ static acpi_status
acpi_ut_copy_esimple_to_isimple(union acpi_object *user_obj,
union acpi_operand_object **return_obj);

static acpi_status
acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object,
union acpi_operand_object **internal_object);

static acpi_status
acpi_ut_copy_simple_object(union acpi_operand_object *source_desc,
union acpi_operand_object *dest_desc);
Expand Down Expand Up @@ -518,77 +522,73 @@ acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object,
return_ACPI_STATUS(AE_NO_MEMORY);
}

#ifdef ACPI_FUTURE_IMPLEMENTATION
/* Code to convert packages that are parameters to control methods */

/*******************************************************************************
*
* FUNCTION: acpi_ut_copy_epackage_to_ipackage
*
* PARAMETERS: *internal_object - Pointer to the object we are returning
* *Buffer - Where the object is returned
* *space_used - Where the length of the object is returned
* PARAMETERS: external_object - The external object to be converted
* internal_object - Where the internal object is returned
*
* RETURN: Status
*
* DESCRIPTION: This function is called to place a package object in a user
* buffer. A package object by definition contains other objects.
*
* The buffer is assumed to have sufficient space for the object.
* The caller must have verified the buffer length needed using the
* acpi_ut_get_object_size function before calling this function.
* DESCRIPTION: Copy an external package object to an internal package.
* Handles nested packages.
*
******************************************************************************/

static acpi_status
acpi_ut_copy_epackage_to_ipackage(union acpi_operand_object *internal_object,
u8 * buffer, u32 * space_used)
acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object,
union acpi_operand_object **internal_object)
{
u8 *free_space;
union acpi_object *external_object;
u32 length = 0;
u32 this_index;
u32 object_space = 0;
union acpi_operand_object *this_internal_obj;
union acpi_object *this_external_obj;
acpi_status status = AE_OK;
union acpi_operand_object *package_object;
union acpi_operand_object **package_elements;
acpi_native_uint i;

ACPI_FUNCTION_TRACE(ut_copy_epackage_to_ipackage);

/*
* First package at head of the buffer
*/
external_object = (union acpi_object *)buffer;
/* Create the package object */

/*
* Free space begins right after the first package
*/
free_space = buffer + sizeof(union acpi_object);
package_object =
acpi_ut_create_package_object(external_object->package.count);
if (!package_object) {
return_ACPI_STATUS(AE_NO_MEMORY);
}

external_object->type = ACPI_GET_OBJECT_TYPE(internal_object);
external_object->package.count = internal_object->package.count;
external_object->package.elements = (union acpi_object *)free_space;
package_elements = package_object->package.elements;

/*
* Build an array of ACPI_OBJECTS in the buffer
* and move the free space past it
* Recursive implementation. Probably ok, since nested external packages
* as parameters should be very rare.
*/
free_space +=
external_object->package.count * sizeof(union acpi_object);
for (i = 0; i < external_object->package.count; i++) {
status =
acpi_ut_copy_eobject_to_iobject(&external_object->package.
elements[i],
&package_elements[i]);
if (ACPI_FAILURE(status)) {

/* Call walk_package */
/* Truncate package and delete it */

}
package_object->package.count = i;
package_elements[i] = NULL;
acpi_ut_remove_reference(package_object);
return_ACPI_STATUS(status);
}
}

#endif /* Future implementation */
*internal_object = package_object;
return_ACPI_STATUS(status);
}

/*******************************************************************************
*
* FUNCTION: acpi_ut_copy_eobject_to_iobject
*
* PARAMETERS: *internal_object - The external object to be converted
* *buffer_ptr - Where the internal object is returned
* PARAMETERS: external_object - The external object to be converted
* internal_object - Where the internal object is returned
*
* RETURN: Status - the status of the call
* RETURN: Status - the status of the call
*
* DESCRIPTION: Converts an external object to an internal object.
*
Expand All @@ -603,16 +603,10 @@ acpi_ut_copy_eobject_to_iobject(union acpi_object *external_object,
ACPI_FUNCTION_TRACE(ut_copy_eobject_to_iobject);

if (external_object->type == ACPI_TYPE_PACKAGE) {
/*
* Packages as external input to control methods are not supported,
*/
ACPI_ERROR((AE_INFO,
"Packages as parameters not implemented!"));

return_ACPI_STATUS(AE_NOT_IMPLEMENTED);
}

else {
status =
acpi_ut_copy_epackage_to_ipackage(external_object,
internal_object);
} else {
/*
* Build a simple object (no nested objects)
*/
Expand Down Expand Up @@ -803,33 +797,19 @@ acpi_ut_copy_ielement_to_ielement(u8 object_type,
* Create and build the package object
*/
target_object =
acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
acpi_ut_create_package_object(source_object->package.count);
if (!target_object) {
return (AE_NO_MEMORY);
}

target_object->package.count = source_object->package.count;
target_object->common.flags = source_object->common.flags;

/*
* Create the object array
*/
target_object->package.elements =
ACPI_ALLOCATE_ZEROED(((acpi_size) source_object->package.
count + 1) * sizeof(void *));
if (!target_object->package.elements) {
status = AE_NO_MEMORY;
goto error_exit;
}
/* Pass the new package object back to the package walk routine */

/*
* Pass the new package object back to the package walk routine
*/
state->pkg.this_target_obj = target_object;

/*
* Store the object pointer in the parent package object
*/
/* Store the object pointer in the parent package object */

*this_target_ptr = target_object;
break;

Expand Down
42 changes: 42 additions & 0 deletions drivers/acpi/utilities/utobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -144,6 +144,48 @@ union acpi_operand_object *acpi_ut_create_internal_object_dbg(char *module_name,
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_buffer_object
Expand Down
2 changes: 2 additions & 0 deletions include/acpi/acutils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -390,6 +390,8 @@ void acpi_ut_delete_object_desc(union acpi_operand_object *object);

u8 acpi_ut_valid_internal_object(void *object);

union acpi_operand_object *acpi_ut_create_package_object(u32 count);

union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size);

union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size);
Expand Down

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