diff options
Diffstat (limited to 'drivers/acpi/utilities/utdelete.c')
| -rw-r--r-- | drivers/acpi/utilities/utdelete.c | 723 |
1 files changed, 0 insertions, 723 deletions
diff --git a/drivers/acpi/utilities/utdelete.c b/drivers/acpi/utilities/utdelete.c deleted file mode 100644 index bc540302268..00000000000 --- a/drivers/acpi/utilities/utdelete.c +++ /dev/null @@ -1,723 +0,0 @@ -/******************************************************************************* - * - * 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; - u32 i; - union acpi_generic_state *state_list = NULL; - union acpi_generic_state *state; - union acpi_operand_object *tmp; - - ACPI_FUNCTION_TRACE_PTR ("ut_update_object_reference", object); - - - /* Ignore a null object ptr */ - - if (!object) { - return_ACPI_STATUS (AE_OK); - } - - /* 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); - } - - state = acpi_ut_create_update_state (object, action); - - while (state) { - object = state->update.object; - action = state->update.value; - acpi_ut_delete_generic_state (state); - - /* - * 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: - - tmp = object->device.system_notify; - if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->device.system_notify = NULL; - acpi_ut_update_ref_count (tmp, action); - - tmp = object->device.device_notify; - if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->device.device_notify = NULL; - acpi_ut_update_ref_count (tmp, 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, etc. - */ - 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; - } - - tmp = object->package.elements[i]; - if (tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->package.elements[i] = NULL; - } - break; - - - case ACPI_TYPE_BUFFER_FIELD: - - status = acpi_ut_create_update_state_and_push ( - object->buffer_field.buffer_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->buffer_field.buffer_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->buffer_field.buffer_obj = NULL; - break; - - - case ACPI_TYPE_LOCAL_REGION_FIELD: - - status = acpi_ut_create_update_state_and_push ( - object->field.region_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->field.region_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->field.region_obj = NULL; - break; - - - case ACPI_TYPE_LOCAL_BANK_FIELD: - - status = acpi_ut_create_update_state_and_push ( - object->bank_field.bank_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->bank_field.bank_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->bank_field.bank_obj = NULL; - - status = acpi_ut_create_update_state_and_push ( - object->bank_field.region_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->bank_field.region_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->bank_field.region_obj = NULL; - break; - - - case ACPI_TYPE_LOCAL_INDEX_FIELD: - - status = acpi_ut_create_update_state_and_push ( - object->index_field.index_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->index_field.index_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->index_field.index_obj = NULL; - - status = acpi_ut_create_update_state_and_push ( - object->index_field.data_obj, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - - tmp = object->index_field.data_obj; - if ( tmp && (tmp->common.reference_count <= 1) && action == REF_DECREMENT) - object->index_field.data_obj = NULL; - 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) { - status = acpi_ut_create_update_state_and_push ( - object->reference.object, action, &state_list); - if (ACPI_FAILURE (status)) { - goto error_exit; - } - } - break; - - - case ACPI_TYPE_REGION: - default: - - /* No subobjects */ - break; - } - - /* - * 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); - - /* Move on to the next object to be updated */ - - state = acpi_ut_pop_generic_state (&state_list); - } - - 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; -} - - |