[deliverable/linux.git] / drivers / acpi / utilities / utdelete.c

/*******************************************************************************
 *
 * Module Name: utdelete - object deletion and reference count utilities
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */


#include <acpi/acpi.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acevents.h>
#include <acpi/amlcode.h>

#define _COMPONENT          ACPI_UTILITIES
	 ACPI_MODULE_NAME    ("utdelete")

/* Local prototypes */

static void
acpi_ut_delete_internal_obj (
	union acpi_operand_object       *object);

static void
acpi_ut_update_ref_count (
	union acpi_operand_object       *object,
	u32                             action);


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_internal_obj
 *
 * PARAMETERS:  Object         - Object to be deleted
 *
 * RETURN:      None
 *
 * DESCRIPTION: Low level object deletion, after reference counts have been
 *              updated (All reference counts, including sub-objects!)
 *
 ******************************************************************************/

static void
acpi_ut_delete_internal_obj (
	union acpi_operand_object       *object)
{
	void                            *obj_pointer = NULL;
	union acpi_operand_object       *handler_desc;
	union acpi_operand_object       *second_desc;
	union acpi_operand_object       *next_desc;


	ACPI_FUNCTION_TRACE_PTR ("ut_delete_internal_obj", object);


	if (!object) {
		return_VOID;
	}

	/*
	 * Must delete or free any pointers within the object that are not
	 * actual ACPI objects (for example, a raw buffer pointer).
	 */
	switch (ACPI_GET_OBJECT_TYPE (object)) {
	case ACPI_TYPE_STRING:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
			object, object->string.pointer));

		/* Free the actual string buffer */

		if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
			/* But only if it is NOT a pointer into an ACPI table */

			obj_pointer = object->string.pointer;
		}
		break;


	case ACPI_TYPE_BUFFER:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
			object, object->buffer.pointer));

		/* Free the actual buffer */

		if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
			/* But only if it is NOT a pointer into an ACPI table */

			obj_pointer = object->buffer.pointer;
		}
		break;


	case ACPI_TYPE_PACKAGE:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
			object->package.count));

		/*
		 * Elements of the package are not handled here, they are deleted
		 * separately
		 */

		/* Free the (variable length) element pointer array */

		obj_pointer = object->package.elements;
		break;


	case ACPI_TYPE_DEVICE:

		if (object->device.gpe_block) {
			(void) acpi_ev_delete_gpe_block (object->device.gpe_block);
		}

		/* Walk the handler list for this device */

		handler_desc = object->device.handler;
		while (handler_desc) {
			next_desc = handler_desc->address_space.next;
			acpi_ut_remove_reference (handler_desc);
			handler_desc = next_desc;
		}
		break;


	case ACPI_TYPE_MUTEX:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"***** Mutex %p, Semaphore %p\n",
			object, object->mutex.semaphore));

		acpi_ex_unlink_mutex (object);
		(void) acpi_os_delete_semaphore (object->mutex.semaphore);
		break;


	case ACPI_TYPE_EVENT:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"***** Event %p, Semaphore %p\n",
			object, object->event.semaphore));

		(void) acpi_os_delete_semaphore (object->event.semaphore);
		object->event.semaphore = NULL;
		break;


	case ACPI_TYPE_METHOD:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"***** Method %p\n", object));

		/* Delete the method semaphore if it exists */

		if (object->method.semaphore) {
			(void) acpi_os_delete_semaphore (object->method.semaphore);
			object->method.semaphore = NULL;
		}
		break;


	case ACPI_TYPE_REGION:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"***** Region %p\n", object));

		second_desc = acpi_ns_get_secondary_object (object);
		if (second_desc) {
			/*
			 * Free the region_context if and only if the handler is one of the
			 * default handlers -- and therefore, we created the context object
			 * locally, it was not created by an external caller.
			 */
			handler_desc = object->region.handler;
			if (handler_desc) {
				if (handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
					obj_pointer = second_desc->extra.region_context;
				}

				acpi_ut_remove_reference (handler_desc);
			}

			/* Now we can free the Extra object */

			acpi_ut_delete_object_desc (second_desc);
		}
		break;


	case ACPI_TYPE_BUFFER_FIELD:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"***** Buffer Field %p\n", object));

		second_desc = acpi_ns_get_secondary_object (object);
		if (second_desc) {
			acpi_ut_delete_object_desc (second_desc);
		}
		break;


	default:
		break;
	}

	/* Free any allocated memory (pointer within the object) found above */

	if (obj_pointer) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
				obj_pointer));
		ACPI_MEM_FREE (obj_pointer);
	}

	/* Now the object can be safely deleted */

	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
			object, acpi_ut_get_object_type_name (object)));

	acpi_ut_delete_object_desc (object);
	return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_delete_internal_object_list
 *
 * PARAMETERS:  obj_list        - Pointer to the list to be deleted
 *
 * RETURN:      None
 *
 * DESCRIPTION: This function deletes an internal object list, including both
 *              simple objects and package objects
 *
 ******************************************************************************/

void
acpi_ut_delete_internal_object_list (
	union acpi_operand_object       **obj_list)
{
	union acpi_operand_object       **internal_obj;


	ACPI_FUNCTION_TRACE ("ut_delete_internal_object_list");


	/* Walk the null-terminated internal list */

	for (internal_obj = obj_list; *internal_obj; internal_obj++) {
		acpi_ut_remove_reference (*internal_obj);
	}

	/* Free the combined parameter pointer list and object array */

	ACPI_MEM_FREE (obj_list);
	return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_update_ref_count
 *
 * PARAMETERS:  Object          - Object whose ref count is to be updated
 *              Action          - What to do
 *
 * RETURN:      New ref count
 *
 * DESCRIPTION: Modify the ref count and return it.
 *
 ******************************************************************************/

static void
acpi_ut_update_ref_count (
	union acpi_operand_object       *object,
	u32                             action)
{
	u16                             count;
	u16                             new_count;


	ACPI_FUNCTION_NAME ("ut_update_ref_count");


	if (!object) {
		return;
	}

	count = object->common.reference_count;
	new_count = count;

	/*
	 * Perform the reference count action
	 * (increment, decrement, or force delete)
	 */
	switch (action) {

	case REF_INCREMENT:

		new_count++;
		object->common.reference_count = new_count;

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"Obj %p Refs=%X, [Incremented]\n",
			object, new_count));
		break;


	case REF_DECREMENT:

		if (count < 1) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
				"Obj %p Refs=%X, can't decrement! (Set to 0)\n",
				object, new_count));

			new_count = 0;
		}
		else {
			new_count--;

			ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
				"Obj %p Refs=%X, [Decremented]\n",
				object, new_count));
		}

		if (ACPI_GET_OBJECT_TYPE (object) == ACPI_TYPE_METHOD) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
				"Method Obj %p Refs=%X, [Decremented]\n",
				object, new_count));
		}

		object->common.reference_count = new_count;
		if (new_count == 0) {
			acpi_ut_delete_internal_obj (object);
		}

		break;


	case REF_FORCE_DELETE:

		ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
			"Obj %p Refs=%X, Force delete! (Set to 0)\n",
			object, count));

		new_count = 0;
		object->common.reference_count = new_count;
		acpi_ut_delete_internal_obj (object);
		break;


	default:

		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown action (%X)\n", action));
		break;
	}

	/*
	 * Sanity check the reference count, for debug purposes only.
	 * (A deleted object will have a huge reference count)
	 */
	if (count > ACPI_MAX_REFERENCE_COUNT) {

		ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
			"**** Warning **** Large Reference Count (%X) in object %p\n\n",
			count, object));
	}

	return;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_update_object_reference
 *
 * PARAMETERS:  Object              - Increment ref count for this object
 *                                    and all sub-objects
 *              Action              - Either REF_INCREMENT or REF_DECREMENT or
 *                                    REF_FORCE_DELETE
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Increment the object reference count
 *
 * Object references are incremented when:
 * 1) An object is attached to a Node (namespace object)
 * 2) An object is copied (all subobjects must be incremented)
 *
 * Object references are decremented when:
 * 1) An object is detached from an Node
 *
 ******************************************************************************/

acpi_status
acpi_ut_update_object_reference (
	union acpi_operand_object       *object,
	u16                             action)
{
	acpi_status                     status = AE_OK;
	union acpi_generic_state        *state_list = NULL;
	union acpi_operand_object       *next_object = NULL;
	union acpi_generic_state        *state;
	acpi_native_uint                i;


	ACPI_FUNCTION_TRACE_PTR ("ut_update_object_reference", object);


	while (object) {
		/* Make sure that this isn't a namespace handle */

		if (ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
				"Object %p is NS handle\n", object));
			return_ACPI_STATUS (AE_OK);
		}

		/*
		 * All sub-objects must have their reference count incremented also.
		 * Different object types have different subobjects.
		 */
		switch (ACPI_GET_OBJECT_TYPE (object)) {
		case ACPI_TYPE_DEVICE:

			acpi_ut_update_ref_count (object->device.system_notify, action);
			acpi_ut_update_ref_count (object->device.device_notify, action);
			break;

		case ACPI_TYPE_PACKAGE:
			/*
			 * We must update all the sub-objects of the package,
			 * each of whom may have their own sub-objects.
			 */
			for (i = 0; i < object->package.count; i++) {
				/*
				 * Push each element onto the stack for later processing.
				 * Note: There can be null elements within the package,
				 * these are simply ignored
				 */
				status = acpi_ut_create_update_state_and_push (
						 object->package.elements[i], action, &state_list);
				if (ACPI_FAILURE (status)) {
					goto error_exit;
				}
			}
			break;

		case ACPI_TYPE_BUFFER_FIELD:

			next_object = object->buffer_field.buffer_obj;
			break;

		case ACPI_TYPE_LOCAL_REGION_FIELD:

			next_object = object->field.region_obj;
			break;

		case ACPI_TYPE_LOCAL_BANK_FIELD:

			next_object = object->bank_field.bank_obj;
			status = acpi_ut_create_update_state_and_push (
					 object->bank_field.region_obj, action, &state_list);
			if (ACPI_FAILURE (status)) {
				goto error_exit;
			}
			break;

		case ACPI_TYPE_LOCAL_INDEX_FIELD:

			next_object = object->index_field.index_obj;
			status = acpi_ut_create_update_state_and_push (
					 object->index_field.data_obj, action, &state_list);
			if (ACPI_FAILURE (status)) {
				goto error_exit;
			}
			break;

		case ACPI_TYPE_LOCAL_REFERENCE:
			/*
			 * The target of an Index (a package, string, or buffer) must track
			 * changes to the ref count of the index.
			 */
			if (object->reference.opcode == AML_INDEX_OP) {
				next_object = object->reference.object;
			}
			break;

		case ACPI_TYPE_REGION:
		default:
			break;/* No subobjects */
		}

		/*
		 * Now we can update the count in the main object.  This can only
		 * happen after we update the sub-objects in case this causes the
		 * main object to be deleted.
		 */
		acpi_ut_update_ref_count (object, action);
		object = NULL;

		/* Move on to the next object to be updated */

		if (next_object) {
			object = next_object;
			next_object = NULL;
		}
		else if (state_list) {
			state = acpi_ut_pop_generic_state (&state_list);
			object = state->update.object;
			acpi_ut_delete_generic_state (state);
		}
	}

	return_ACPI_STATUS (AE_OK);

error_exit:

	ACPI_REPORT_ERROR (("Could not update object reference count, %s\n",
		acpi_format_exception (status)));

	return_ACPI_STATUS (status);
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_add_reference
 *
 * PARAMETERS:  Object          - Object whose reference count is to be
 *                                incremented
 *
 * RETURN:      None
 *
 * DESCRIPTION: Add one reference to an ACPI object
 *
 ******************************************************************************/

void
acpi_ut_add_reference (
	union acpi_operand_object       *object)
{

	ACPI_FUNCTION_TRACE_PTR ("ut_add_reference", object);


	/* Ensure that we have a valid object */

	if (!acpi_ut_valid_internal_object (object)) {
		return_VOID;
	}

	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
		"Obj %p Current Refs=%X [To Be Incremented]\n",
		object, object->common.reference_count));

	/* Increment the reference count */

	(void) acpi_ut_update_object_reference (object, REF_INCREMENT);
	return_VOID;
}


/*******************************************************************************
 *
 * FUNCTION:    acpi_ut_remove_reference
 *
 * PARAMETERS:  Object         - Object whose ref count will be decremented
 *
 * RETURN:      None
 *
 * DESCRIPTION: Decrement the reference count of an ACPI internal object
 *
 ******************************************************************************/

void
acpi_ut_remove_reference (
	union acpi_operand_object       *object)
{

	ACPI_FUNCTION_TRACE_PTR ("ut_remove_reference", object);


	/*
	 * Allow a NULL pointer to be passed in, just ignore it.  This saves
	 * each caller from having to check.  Also, ignore NS nodes.
	 *
	 */
	if (!object ||
		(ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED)) {
		return_VOID;
	}

	/* Ensure that we have a valid object */

	if (!acpi_ut_valid_internal_object (object)) {
		return_VOID;
	}

	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
		"Obj %p Current Refs=%X [To Be Decremented]\n",
		object, object->common.reference_count));

	/*
	 * Decrement the reference count, and only actually delete the object
	 * if the reference count becomes 0.  (Must also decrement the ref count
	 * of all subobjects!)
	 */
	(void) acpi_ut_update_object_reference (object, REF_DECREMENT);
	return_VOID;
}
Commit	Line	Data
1da177e4 LT	1	/*******************************************************************************
	2	*
	3	* Module Name: utdelete - object deletion and reference count utilities
	4	*
	5	******************************************************************************/
	6
	7	/*
	8	* Copyright (C) 2000 - 2005, R. Byron Moore
	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
	44
	45	#include <acpi/acpi.h>
	46	#include <acpi/acinterp.h>
	47	#include <acpi/acnamesp.h>
	48	#include <acpi/acevents.h>
	49	#include <acpi/amlcode.h>
	50
	51	#define _COMPONENT ACPI_UTILITIES
	52	ACPI_MODULE_NAME ("utdelete")
	53
44f6c012 RM	54	/* Local prototypes */
	55
	56	static void
	57	acpi_ut_delete_internal_obj (
	58	union acpi_operand_object *object);
	59
	60	static void
	61	acpi_ut_update_ref_count (
	62	union acpi_operand_object *object,
	63	u32 action);
	64
1da177e4 LT	65
	66	/*******************************************************************************
	67	*
	68	* FUNCTION: acpi_ut_delete_internal_obj
	69	*
44f6c012	70	* PARAMETERS: Object - Object to be deleted
1da177e4 LT	71	*
	72	* RETURN: None
	73	*
	74	* DESCRIPTION: Low level object deletion, after reference counts have been
	75	* updated (All reference counts, including sub-objects!)
	76	*
	77	******************************************************************************/
	78
44f6c012	79	static void
1da177e4 LT	80	acpi_ut_delete_internal_obj (
	81	union acpi_operand_object *object)
	82	{
	83	void *obj_pointer = NULL;
	84	union acpi_operand_object *handler_desc;
	85	union acpi_operand_object *second_desc;
	86	union acpi_operand_object *next_desc;
	87
	88
	89	ACPI_FUNCTION_TRACE_PTR ("ut_delete_internal_obj", object);
	90
	91
	92	if (!object) {
	93	return_VOID;
	94	}
	95
	96	/*
	97	* Must delete or free any pointers within the object that are not
	98	* actual ACPI objects (for example, a raw buffer pointer).
	99	*/
	100	switch (ACPI_GET_OBJECT_TYPE (object)) {
	101	case ACPI_TYPE_STRING:
	102
	103	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
	104	object, object->string.pointer));
	105
	106	/* Free the actual string buffer */
	107
	108	if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
	109	/* But only if it is NOT a pointer into an ACPI table */
	110
	111	obj_pointer = object->string.pointer;
	112	}
	113	break;
	114
	115
	116	case ACPI_TYPE_BUFFER:
	117
	118	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
	119	object, object->buffer.pointer));
	120
	121	/* Free the actual buffer */
	122
	123	if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
	124	/* But only if it is NOT a pointer into an ACPI table */
	125
	126	obj_pointer = object->buffer.pointer;
	127	}
	128	break;
	129
	130
	131	case ACPI_TYPE_PACKAGE:
	132
	133	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
	134	object->package.count));
	135
	136	/*
	137	* Elements of the package are not handled here, they are deleted
	138	* separately
	139	*/
	140
	141	/* Free the (variable length) element pointer array */
	142
	143	obj_pointer = object->package.elements;
144	break;
145
146
147	case ACPI_TYPE_DEVICE:
148
149	if (object->device.gpe_block) {
150	(void) acpi_ev_delete_gpe_block (object->device.gpe_block);
151	}
152
153	/* Walk the handler list for this device */
154
155	handler_desc = object->device.handler;
156	while (handler_desc) {
157	next_desc = handler_desc->address_space.next;
158	acpi_ut_remove_reference (handler_desc);
159	handler_desc = next_desc;
160	}
161	break;
162
163
164	case ACPI_TYPE_MUTEX:
165
44f6c012 RM	166	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	167	"***** Mutex %p, Semaphore %p\n",
1da177e4 LT	168	object, object->mutex.semaphore));
	169
	170	acpi_ex_unlink_mutex (object);
	171	(void) acpi_os_delete_semaphore (object->mutex.semaphore);
	172	break;
	173
	174
	175	case ACPI_TYPE_EVENT:
	176
44f6c012 RM	177	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	178	"***** Event %p, Semaphore %p\n",
1da177e4 LT	179	object, object->event.semaphore));
	180
	181	(void) acpi_os_delete_semaphore (object->event.semaphore);
	182	object->event.semaphore = NULL;
	183	break;
	184
	185
	186	case ACPI_TYPE_METHOD:
	187
44f6c012 RM	188	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	189	"***** Method %p\n", object));
1da177e4 LT	190
	191	/* Delete the method semaphore if it exists */
	192
	193	if (object->method.semaphore) {
	194	(void) acpi_os_delete_semaphore (object->method.semaphore);
	195	object->method.semaphore = NULL;
	196	}
	197	break;
	198
	199
	200	case ACPI_TYPE_REGION:
	201
44f6c012 RM	202	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	203	"***** Region %p\n", object));
1da177e4 LT	204
	205	second_desc = acpi_ns_get_secondary_object (object);
	206	if (second_desc) {
	207	/*
	208	* Free the region_context if and only if the handler is one of the
	209	* default handlers -- and therefore, we created the context object
	210	* locally, it was not created by an external caller.
	211	*/
	212	handler_desc = object->region.handler;
	213	if (handler_desc) {
	214	if (handler_desc->address_space.hflags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
	215	obj_pointer = second_desc->extra.region_context;
	216	}
	217
	218	acpi_ut_remove_reference (handler_desc);
	219	}
	220
	221	/* Now we can free the Extra object */
	222
	223	acpi_ut_delete_object_desc (second_desc);
	224	}
	225	break;
	226
	227
	228	case ACPI_TYPE_BUFFER_FIELD:
	229
44f6c012 RM	230	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	231	"***** Buffer Field %p\n", object));
1da177e4 LT	232
	233	second_desc = acpi_ns_get_secondary_object (object);
	234	if (second_desc) {
	235	acpi_ut_delete_object_desc (second_desc);
	236	}
	237	break;
	238
	239
	240	default:
	241	break;
	242	}
	243
	244	/* Free any allocated memory (pointer within the object) found above */
	245
	246	if (obj_pointer) {
	247	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
	248	obj_pointer));
	249	ACPI_MEM_FREE (obj_pointer);
	250	}
	251
	252	/* Now the object can be safely deleted */
	253
	254	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
	255	object, acpi_ut_get_object_type_name (object)));
	256
	257	acpi_ut_delete_object_desc (object);
	258	return_VOID;
	259	}
	260
	261
	262	/*******************************************************************************
	263	*
	264	* FUNCTION: acpi_ut_delete_internal_object_list
	265	*
44f6c012	266	* PARAMETERS: obj_list - Pointer to the list to be deleted
1da177e4 LT	267	*
	268	* RETURN: None
	269	*
	270	* DESCRIPTION: This function deletes an internal object list, including both
	271	* simple objects and package objects
	272	*
	273	******************************************************************************/
	274
	275	void
	276	acpi_ut_delete_internal_object_list (
	277	union acpi_operand_object **obj_list)
	278	{
	279	union acpi_operand_object **internal_obj;
	280
	281
	282	ACPI_FUNCTION_TRACE ("ut_delete_internal_object_list");
	283
	284
	285	/* Walk the null-terminated internal list */
	286
	287	for (internal_obj = obj_list; *internal_obj; internal_obj++) {
	288	acpi_ut_remove_reference (*internal_obj);
	289	}
	290
	291	/* Free the combined parameter pointer list and object array */
	292
	293	ACPI_MEM_FREE (obj_list);
	294	return_VOID;
	295	}
	296
	297
	298	/*******************************************************************************
	299	*
	300	* FUNCTION: acpi_ut_update_ref_count
	301	*
44f6c012	302	* PARAMETERS: Object - Object whose ref count is to be updated
1da177e4 LT	303	* Action - What to do
	304	*
	305	* RETURN: New ref count
	306	*
	307	* DESCRIPTION: Modify the ref count and return it.
	308	*
	309	******************************************************************************/
	310
	311	static void
	312	acpi_ut_update_ref_count (
	313	union acpi_operand_object *object,
	314	u32 action)
	315	{
	316	u16 count;
	317	u16 new_count;
	318
	319
	320	ACPI_FUNCTION_NAME ("ut_update_ref_count");
	321
	322
	323	if (!object) {
	324	return;
	325	}
	326
	327	count = object->common.reference_count;
	328	new_count = count;
	329
	330	/*
44f6c012 RM	331	* Perform the reference count action
44f6c012 RM	332	* (increment, decrement, or force delete)
1da177e4 LT	333	*/
	334	switch (action) {
	335
	336	case REF_INCREMENT:
	337
	338	new_count++;
	339	object->common.reference_count = new_count;
	340
44f6c012 RM	341	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	342	"Obj %p Refs=%X, [Incremented]\n",
1da177e4 LT	343	object, new_count));
	344	break;
	345
	346
	347	case REF_DECREMENT:
	348
	349	if (count < 1) {
44f6c012 RM	350	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	351	"Obj %p Refs=%X, can't decrement! (Set to 0)\n",
1da177e4 LT	352	object, new_count));
	353
	354	new_count = 0;
	355	}
	356	else {
	357	new_count--;
	358
44f6c012 RM	359	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	360	"Obj %p Refs=%X, [Decremented]\n",
1da177e4 LT	361	object, new_count));
	362	}
	363
	364	if (ACPI_GET_OBJECT_TYPE (object) == ACPI_TYPE_METHOD) {
44f6c012 RM	365	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	366	"Method Obj %p Refs=%X, [Decremented]\n",
1da177e4 LT	367	object, new_count));
	368	}
	369
	370	object->common.reference_count = new_count;
	371	if (new_count == 0) {
	372	acpi_ut_delete_internal_obj (object);
	373	}
	374
	375	break;
	376
	377
	378	case REF_FORCE_DELETE:
	379
44f6c012 RM	380	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
44f6c012 RM	381	"Obj %p Refs=%X, Force delete! (Set to 0)\n",
1da177e4 LT	382	object, count));
	383
	384	new_count = 0;
	385	object->common.reference_count = new_count;
	386	acpi_ut_delete_internal_obj (object);
	387	break;
	388
	389
	390	default:
	391
	392	ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unknown action (%X)\n", action));
	393	break;
	394	}
	395
	396	/*
	397	* Sanity check the reference count, for debug purposes only.
	398	* (A deleted object will have a huge reference count)
	399	*/
	400	if (count > ACPI_MAX_REFERENCE_COUNT) {
	401
	402	ACPI_DEBUG_PRINT ((ACPI_DB_WARN,
	403	"** Warning ** Large Reference Count (%X) in object %p\n\n",
	404	count, object));
	405	}
	406
	407	return;
	408	}
	409
	410
	411	/*******************************************************************************
	412	*
	413	* FUNCTION: acpi_ut_update_object_reference
	414	*
44f6c012	415	* PARAMETERS: Object - Increment ref count for this object
1da177e4 LT	416	* and all sub-objects
	417	* Action - Either REF_INCREMENT or REF_DECREMENT or
	418	* REF_FORCE_DELETE
	419	*
	420	* RETURN: Status
	421	*
	422	* DESCRIPTION: Increment the object reference count
	423	*
	424	* Object references are incremented when:
	425	* 1) An object is attached to a Node (namespace object)
	426	* 2) An object is copied (all subobjects must be incremented)
	427	*
	428	* Object references are decremented when:
	429	* 1) An object is detached from an Node
	430	*
	431	******************************************************************************/
	432
	433	acpi_status
	434	acpi_ut_update_object_reference (
	435	union acpi_operand_object *object,
	436	u16 action)
	437	{
f9f4601f RM	438	acpi_status status = AE_OK;
	439	union acpi_generic_state *state_list = NULL;
	440	union acpi_operand_object *next_object = NULL;
	441	union acpi_generic_state *state;
	442	acpi_native_uint i;
4c3ffbd7	443
1da177e4 LT	444
	445	ACPI_FUNCTION_TRACE_PTR ("ut_update_object_reference", object);
	446
	447
f9f4601f RM	448	while (object) {
f9f4601f RM	449	/* Make sure that this isn't a namespace handle */
1da177e4	450
f9f4601f RM	451	if (ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED) {
	452	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
	453	"Object %p is NS handle\n", object));
	454	return_ACPI_STATUS (AE_OK);
	455	}
1da177e4 LT	456
	457	/*
	458	* All sub-objects must have their reference count incremented also.
	459	* Different object types have different subobjects.
	460	*/
	461	switch (ACPI_GET_OBJECT_TYPE (object)) {
	462	case ACPI_TYPE_DEVICE:
	463
4c3ffbd7 DSL	464	acpi_ut_update_ref_count (object->device.system_notify, action);
4c3ffbd7 DSL	465	acpi_ut_update_ref_count (object->device.device_notify, action);
1da177e4 LT	466	break;
1da177e4 LT	467
1da177e4	468	case ACPI_TYPE_PACKAGE:
1da177e4	469	/*
f9f4601f RM	470	* We must update all the sub-objects of the package,
f9f4601f RM	471	* each of whom may have their own sub-objects.
1da177e4 LT	472	*/
	473	for (i = 0; i < object->package.count; i++) {
	474	/*
	475	* Push each element onto the stack for later processing.
	476	* Note: There can be null elements within the package,
	477	* these are simply ignored
	478	*/
	479	status = acpi_ut_create_update_state_and_push (
	480	object->package.elements[i], action, &state_list);
	481	if (ACPI_FAILURE (status)) {
	482	goto error_exit;
	483	}
1da177e4 LT	484	}
	485	break;
	486
1da177e4 LT	487	case ACPI_TYPE_BUFFER_FIELD:
1da177e4 LT	488
f9f4601f	489	next_object = object->buffer_field.buffer_obj;
1da177e4 LT	490	break;
1da177e4 LT	491
1da177e4 LT	492	case ACPI_TYPE_LOCAL_REGION_FIELD:
1da177e4 LT	493
f9f4601f RM	494	next_object = object->field.region_obj;
f9f4601f RM	495	break;
1da177e4 LT	496
	497	case ACPI_TYPE_LOCAL_BANK_FIELD:
	498
f9f4601f	499	next_object = object->bank_field.bank_obj;
1da177e4 LT	500	status = acpi_ut_create_update_state_and_push (
	501	object->bank_field.region_obj, action, &state_list);
	502	if (ACPI_FAILURE (status)) {
	503	goto error_exit;
	504	}
1da177e4 LT	505	break;
1da177e4 LT	506
1da177e4 LT	507	case ACPI_TYPE_LOCAL_INDEX_FIELD:
1da177e4 LT	508
f9f4601f	509	next_object = object->index_field.index_obj;
1da177e4 LT	510	status = acpi_ut_create_update_state_and_push (
	511	object->index_field.data_obj, action, &state_list);
	512	if (ACPI_FAILURE (status)) {
	513	goto error_exit;
	514	}
1da177e4 LT	515	break;
1da177e4 LT	516
1da177e4	517	case ACPI_TYPE_LOCAL_REFERENCE:
1da177e4 LT	518	/*
	519	* The target of an Index (a package, string, or buffer) must track
	520	* changes to the ref count of the index.
	521	*/
	522	if (object->reference.opcode == AML_INDEX_OP) {
f9f4601f	523	next_object = object->reference.object;
1da177e4 LT	524	}
	525	break;
	526
1da177e4 LT	527	case ACPI_TYPE_REGION:
1da177e4 LT	528	default:
f9f4601f	529	break;/* No subobjects */
1da177e4 LT	530	}
	531
	532	/*
	533	* Now we can update the count in the main object. This can only
	534	* happen after we update the sub-objects in case this causes the
	535	* main object to be deleted.
	536	*/
	537	acpi_ut_update_ref_count (object, action);
f9f4601f	538	object = NULL;
1da177e4 LT	539
	540	/* Move on to the next object to be updated */
	541
f9f4601f RM	542	if (next_object) {
	543	object = next_object;
	544	next_object = NULL;
	545	}
	546	else if (state_list) {
	547	state = acpi_ut_pop_generic_state (&state_list);
	548	object = state->update.object;
	549	acpi_ut_delete_generic_state (state);
	550	}
1da177e4 LT	551	}
	552
	553	return_ACPI_STATUS (AE_OK);
	554
1da177e4 LT	555	error_exit:
	556
	557	ACPI_REPORT_ERROR (("Could not update object reference count, %s\n",
	558	acpi_format_exception (status)));
	559
	560	return_ACPI_STATUS (status);
	561	}
	562
	563
	564	/*******************************************************************************
	565	*
	566	* FUNCTION: acpi_ut_add_reference
	567	*
44f6c012 RM	568	* PARAMETERS: Object - Object whose reference count is to be
44f6c012 RM	569	* incremented
1da177e4 LT	570	*
	571	* RETURN: None
	572	*
	573	* DESCRIPTION: Add one reference to an ACPI object
	574	*
	575	******************************************************************************/
	576
	577	void
	578	acpi_ut_add_reference (
	579	union acpi_operand_object *object)
	580	{
	581
	582	ACPI_FUNCTION_TRACE_PTR ("ut_add_reference", object);
	583
	584
	585	/* Ensure that we have a valid object */
	586
	587	if (!acpi_ut_valid_internal_object (object)) {
	588	return_VOID;
	589	}
	590
	591	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
	592	"Obj %p Current Refs=%X [To Be Incremented]\n",
	593	object, object->common.reference_count));
	594
	595	/* Increment the reference count */
	596
	597	(void) acpi_ut_update_object_reference (object, REF_INCREMENT);
	598	return_VOID;
	599	}
	600
	601
	602	/*******************************************************************************
	603	*
	604	* FUNCTION: acpi_ut_remove_reference
	605	*
44f6c012	606	* PARAMETERS: Object - Object whose ref count will be decremented
1da177e4 LT	607	*
	608	* RETURN: None
	609	*
	610	* DESCRIPTION: Decrement the reference count of an ACPI internal object
	611	*
	612	******************************************************************************/
	613
	614	void
	615	acpi_ut_remove_reference (
	616	union acpi_operand_object *object)
	617	{
	618
	619	ACPI_FUNCTION_TRACE_PTR ("ut_remove_reference", object);
	620
	621
	622	/*
	623	* Allow a NULL pointer to be passed in, just ignore it. This saves
	624	* each caller from having to check. Also, ignore NS nodes.
	625	*
	626	*/
	627	if (!object \|\|
	628	(ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED)) {
	629	return_VOID;
	630	}
	631
	632	/* Ensure that we have a valid object */
	633
	634	if (!acpi_ut_valid_internal_object (object)) {
	635	return_VOID;
	636	}
	637
	638	ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
	639	"Obj %p Current Refs=%X [To Be Decremented]\n",
	640	object, object->common.reference_count));
	641
	642	/*
	643	* Decrement the reference count, and only actually delete the object
	644	* if the reference count becomes 0. (Must also decrement the ref count
	645	* of all subobjects!)
	646	*/
	647	(void) acpi_ut_update_object_reference (object, REF_DECREMENT);
	648	return_VOID;
	649	}
	650
	651