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Diffstat (limited to 'drivers/acpi/acpica/utcopy.c')
| -rw-r--r-- | drivers/acpi/acpica/utcopy.c | 1011 |
1 files changed, 1011 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c new file mode 100644 index 000000000..c37ec5035 --- /dev/null +++ b/drivers/acpi/acpica/utcopy.c @@ -0,0 +1,1011 @@ +/****************************************************************************** + * + * Module Name: utcopy - Internal to external object translation utilities + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2015, Intel Corp. + * 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 "accommon.h" +#include "acnamesp.h" + + +#define _COMPONENT ACPI_UTILITIES +ACPI_MODULE_NAME("utcopy") + +/* Local prototypes */ +static acpi_status +acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object, + union acpi_object *external_object, + u8 * data_space, acpi_size * buffer_space_used); + +static acpi_status +acpi_ut_copy_ielement_to_ielement(u8 object_type, + union acpi_operand_object *source_object, + union acpi_generic_state *state, + void *context); + +static acpi_status +acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object, + u8 * buffer, acpi_size * space_used); + +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); + +static acpi_status +acpi_ut_copy_ielement_to_eelement(u8 object_type, + union acpi_operand_object *source_object, + union acpi_generic_state *state, + void *context); + +static acpi_status +acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj, + union acpi_operand_object *dest_obj, + struct acpi_walk_state *walk_state); + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_isimple_to_esimple + * + * PARAMETERS: internal_object - Source object to be copied + * external_object - Where to return the copied object + * data_space - Where object data is returned (such as + * buffer and string data) + * buffer_space_used - Length of data_space that was used + * + * RETURN: Status + * + * DESCRIPTION: This function is called to copy a simple internal object to + * an external object. + * + * The data_space buffer is assumed to have sufficient space for + * the object. + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_isimple_to_esimple(union acpi_operand_object *internal_object, + union acpi_object *external_object, + u8 * data_space, acpi_size * buffer_space_used) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ut_copy_isimple_to_esimple); + + *buffer_space_used = 0; + + /* + * Check for NULL object case (could be an uninitialized + * package element) + */ + if (!internal_object) { + return_ACPI_STATUS(AE_OK); + } + + /* Always clear the external object */ + + ACPI_MEMSET(external_object, 0, sizeof(union acpi_object)); + + /* + * In general, the external object will be the same type as + * the internal object + */ + external_object->type = internal_object->common.type; + + /* However, only a limited number of external types are supported */ + + switch (internal_object->common.type) { + case ACPI_TYPE_STRING: + + external_object->string.pointer = (char *)data_space; + external_object->string.length = internal_object->string.length; + *buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size) + internal_object-> + string. + length + 1); + + ACPI_MEMCPY((void *)data_space, + (void *)internal_object->string.pointer, + (acpi_size) internal_object->string.length + 1); + break; + + case ACPI_TYPE_BUFFER: + + external_object->buffer.pointer = data_space; + external_object->buffer.length = internal_object->buffer.length; + *buffer_space_used = + ACPI_ROUND_UP_TO_NATIVE_WORD(internal_object->string. + length); + + ACPI_MEMCPY((void *)data_space, + (void *)internal_object->buffer.pointer, + internal_object->buffer.length); + break; + + case ACPI_TYPE_INTEGER: + + external_object->integer.value = internal_object->integer.value; + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + + /* This is an object reference. */ + + switch (internal_object->reference.class) { + case ACPI_REFCLASS_NAME: + /* + * For namepath, return the object handle ("reference") + * We are referring to the namespace node + */ + external_object->reference.handle = + internal_object->reference.node; + external_object->reference.actual_type = + acpi_ns_get_type(internal_object->reference.node); + break; + + default: + + /* All other reference types are unsupported */ + + return_ACPI_STATUS(AE_TYPE); + } + break; + + case ACPI_TYPE_PROCESSOR: + + external_object->processor.proc_id = + internal_object->processor.proc_id; + external_object->processor.pblk_address = + internal_object->processor.address; + external_object->processor.pblk_length = + internal_object->processor.length; + break; + + case ACPI_TYPE_POWER: + + external_object->power_resource.system_level = + internal_object->power_resource.system_level; + + external_object->power_resource.resource_order = + internal_object->power_resource.resource_order; + break; + + default: + /* + * There is no corresponding external object type + */ + ACPI_ERROR((AE_INFO, + "Unsupported object type, cannot convert to external object: %s", + acpi_ut_get_type_name(internal_object->common. + type))); + + return_ACPI_STATUS(AE_SUPPORT); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_ielement_to_eelement + * + * PARAMETERS: acpi_pkg_callback + * + * RETURN: Status + * + * DESCRIPTION: Copy one package element to another package element + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_ielement_to_eelement(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; + u32 this_index; + union acpi_object *target_object; + + ACPI_FUNCTION_ENTRY(); + + this_index = state->pkg.index; + target_object = (union acpi_object *) + &((union acpi_object *)(state->pkg.dest_object))->package. + elements[this_index]; + + switch (object_type) { + case ACPI_COPY_TYPE_SIMPLE: + /* + * This is a simple or null object + */ + status = acpi_ut_copy_isimple_to_esimple(source_object, + target_object, + info->free_space, + &object_space); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + case ACPI_COPY_TYPE_PACKAGE: + /* + * Build the package object + */ + target_object->type = ACPI_TYPE_PACKAGE; + target_object->package.count = source_object->package.count; + target_object->package.elements = + ACPI_CAST_PTR(union acpi_object, info->free_space); + + /* + * Pass the new package object back to the package walk routine + */ + state->pkg.this_target_obj = target_object; + + /* + * Save space for the array of objects (Package elements) + * update the buffer length counter + */ + object_space = ACPI_ROUND_UP_TO_NATIVE_WORD((acpi_size) + target_object-> + package.count * + sizeof(union + acpi_object)); + break; + + default: + + return (AE_BAD_PARAMETER); + } + + info->free_space += object_space; + info->length += object_space; + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_ipackage_to_epackage + * + * PARAMETERS: internal_object - Pointer to the object we are returning + * buffer - Where the object is returned + * space_used - Where the object length 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. + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_ipackage_to_epackage(union acpi_operand_object *internal_object, + u8 * buffer, acpi_size * space_used) +{ + union acpi_object *external_object; + acpi_status status; + struct acpi_pkg_info info; + + ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_epackage); + + /* + * First package at head of the buffer + */ + external_object = ACPI_CAST_PTR(union acpi_object, buffer); + + /* + * Free space begins right after the first package + */ + info.length = ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); + info.free_space = + buffer + ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); + info.object_space = 0; + info.num_packages = 1; + + external_object->type = internal_object->common.type; + external_object->package.count = internal_object->package.count; + external_object->package.elements = ACPI_CAST_PTR(union acpi_object, + info.free_space); + + /* + * Leave room for an array of ACPI_OBJECTS in the buffer + * and move the free space past it + */ + info.length += (acpi_size) external_object->package.count * + ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); + info.free_space += external_object->package.count * + ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)); + + status = acpi_ut_walk_package_tree(internal_object, external_object, + acpi_ut_copy_ielement_to_eelement, + &info); + + *space_used = info.length; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_iobject_to_eobject + * + * PARAMETERS: internal_object - The internal object to be converted + * ret_buffer - Where the object is returned + * + * RETURN: Status + * + * DESCRIPTION: This function is called to build an API object to be returned + * to the caller. + * + ******************************************************************************/ + +acpi_status +acpi_ut_copy_iobject_to_eobject(union acpi_operand_object *internal_object, + struct acpi_buffer *ret_buffer) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ut_copy_iobject_to_eobject); + + if (internal_object->common.type == ACPI_TYPE_PACKAGE) { + /* + * Package object: Copy all subobjects (including + * nested packages) + */ + status = acpi_ut_copy_ipackage_to_epackage(internal_object, + ret_buffer->pointer, + &ret_buffer->length); + } else { + /* + * Build a simple object (no nested objects) + */ + status = acpi_ut_copy_isimple_to_esimple(internal_object, + ACPI_CAST_PTR(union + acpi_object, + ret_buffer-> + pointer), + ACPI_ADD_PTR(u8, + ret_buffer-> + pointer, + ACPI_ROUND_UP_TO_NATIVE_WORD + (sizeof + (union + acpi_object))), + &ret_buffer->length); + /* + * build simple does not include the object size in the length + * so we add it in here + */ + ret_buffer->length += sizeof(union acpi_object); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_esimple_to_isimple + * + * PARAMETERS: external_object - The external object to be converted + * ret_internal_object - Where the internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: This function copies an external object to an internal one. + * NOTE: Pointers can be copied, we don't need to copy data. + * (The pointers have to be valid in our address space no matter + * what we do with them!) + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_esimple_to_isimple(union acpi_object *external_object, + union acpi_operand_object **ret_internal_object) +{ + union acpi_operand_object *internal_object; + + ACPI_FUNCTION_TRACE(ut_copy_esimple_to_isimple); + + /* + * Simple types supported are: String, Buffer, Integer + */ + switch (external_object->type) { + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_LOCAL_REFERENCE: + + internal_object = acpi_ut_create_internal_object((u8) + external_object-> + type); + if (!internal_object) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + break; + + case ACPI_TYPE_ANY: /* This is the case for a NULL object */ + + *ret_internal_object = NULL; + return_ACPI_STATUS(AE_OK); + + default: + + /* All other types are not supported */ + + ACPI_ERROR((AE_INFO, + "Unsupported object type, cannot convert to internal object: %s", + acpi_ut_get_type_name(external_object->type))); + + return_ACPI_STATUS(AE_SUPPORT); + } + + /* Must COPY string and buffer contents */ + + switch (external_object->type) { + case ACPI_TYPE_STRING: + + internal_object->string.pointer = + ACPI_ALLOCATE_ZEROED((acpi_size) + external_object->string.length + 1); + + if (!internal_object->string.pointer) { + goto error_exit; + } + + ACPI_MEMCPY(internal_object->string.pointer, + external_object->string.pointer, + external_object->string.length); + + internal_object->string.length = external_object->string.length; + break; + + case ACPI_TYPE_BUFFER: + + internal_object->buffer.pointer = + ACPI_ALLOCATE_ZEROED(external_object->buffer.length); + if (!internal_object->buffer.pointer) { + goto error_exit; + } + + ACPI_MEMCPY(internal_object->buffer.pointer, + external_object->buffer.pointer, + external_object->buffer.length); + + internal_object->buffer.length = external_object->buffer.length; + + /* Mark buffer data valid */ + + internal_object->buffer.flags |= AOPOBJ_DATA_VALID; + break; + + case ACPI_TYPE_INTEGER: + + internal_object->integer.value = external_object->integer.value; + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + + /* An incoming reference is defined to be a namespace node */ + + internal_object->reference.class = ACPI_REFCLASS_REFOF; + internal_object->reference.object = + external_object->reference.handle; + break; + + default: + + /* Other types can't get here */ + + break; + } + + *ret_internal_object = internal_object; + return_ACPI_STATUS(AE_OK); + +error_exit: + acpi_ut_remove_reference(internal_object); + return_ACPI_STATUS(AE_NO_MEMORY); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_epackage_to_ipackage + * + * PARAMETERS: external_object - The external object to be converted + * internal_object - Where the internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Copy an external package object to an internal package. + * Handles nested packages. + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_epackage_to_ipackage(union acpi_object *external_object, + union acpi_operand_object **internal_object) +{ + acpi_status status = AE_OK; + union acpi_operand_object *package_object; + union acpi_operand_object **package_elements; + u32 i; + + ACPI_FUNCTION_TRACE(ut_copy_epackage_to_ipackage); + + /* Create the package object */ + + package_object = + acpi_ut_create_package_object(external_object->package.count); + if (!package_object) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + package_elements = package_object->package.elements; + + /* + * Recursive implementation. Probably ok, since nested external packages + * as parameters should be very rare. + */ + 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)) { + + /* Truncate package and delete it */ + + package_object->package.count = i; + package_elements[i] = NULL; + acpi_ut_remove_reference(package_object); + return_ACPI_STATUS(status); + } + } + + /* Mark package data valid */ + + package_object->package.flags |= AOPOBJ_DATA_VALID; + + *internal_object = package_object; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_eobject_to_iobject + * + * PARAMETERS: external_object - The external object to be converted + * internal_object - Where the internal object is returned + * + * RETURN: Status + * + * DESCRIPTION: Converts an external object to an internal object. + * + ******************************************************************************/ + +acpi_status +acpi_ut_copy_eobject_to_iobject(union acpi_object *external_object, + union acpi_operand_object **internal_object) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ut_copy_eobject_to_iobject); + + if (external_object->type == ACPI_TYPE_PACKAGE) { + status = + acpi_ut_copy_epackage_to_ipackage(external_object, + internal_object); + } else { + /* + * Build a simple object (no nested objects) + */ + status = + acpi_ut_copy_esimple_to_isimple(external_object, + internal_object); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_simple_object + * + * PARAMETERS: source_desc - The internal object to be copied + * dest_desc - New target object + * + * RETURN: Status + * + * DESCRIPTION: Simple copy of one internal object to another. Reference count + * of the destination object is preserved. + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_simple_object(union acpi_operand_object *source_desc, + union acpi_operand_object *dest_desc) +{ + u16 reference_count; + union acpi_operand_object *next_object; + acpi_status status; + acpi_size copy_size; + + /* Save fields from destination that we don't want to overwrite */ + + reference_count = dest_desc->common.reference_count; + next_object = dest_desc->common.next_object; + + /* + * Copy the entire source object over the destination object. + * Note: Source can be either an operand object or namespace node. + */ + copy_size = sizeof(union acpi_operand_object); + if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_NAMED) { + copy_size = sizeof(struct acpi_namespace_node); + } + + ACPI_MEMCPY(ACPI_CAST_PTR(char, dest_desc), + ACPI_CAST_PTR(char, source_desc), copy_size); + + /* Restore the saved fields */ + + dest_desc->common.reference_count = reference_count; + dest_desc->common.next_object = next_object; + + /* New object is not static, regardless of source */ + + dest_desc->common.flags &= ~AOPOBJ_STATIC_POINTER; + + /* Handle the objects with extra data */ + + switch (dest_desc->common.type) { + case ACPI_TYPE_BUFFER: + /* + * Allocate and copy the actual buffer if and only if: + * 1) There is a valid buffer pointer + * 2) The buffer has a length > 0 + */ + if ((source_desc->buffer.pointer) && + (source_desc->buffer.length)) { + dest_desc->buffer.pointer = + ACPI_ALLOCATE(source_desc->buffer.length); + if (!dest_desc->buffer.pointer) { + return (AE_NO_MEMORY); + } + + /* Copy the actual buffer data */ + + ACPI_MEMCPY(dest_desc->buffer.pointer, + source_desc->buffer.pointer, + source_desc->buffer.length); + } + break; + + case ACPI_TYPE_STRING: + /* + * Allocate and copy the actual string if and only if: + * 1) There is a valid string pointer + * (Pointer to a NULL string is allowed) + */ + if (source_desc->string.pointer) { + dest_desc->string.pointer = + ACPI_ALLOCATE((acpi_size) source_desc->string. + length + 1); + if (!dest_desc->string.pointer) { + return (AE_NO_MEMORY); + } + + /* Copy the actual string data */ + + ACPI_MEMCPY(dest_desc->string.pointer, + source_desc->string.pointer, + (acpi_size) source_desc->string.length + 1); + } + break; + + case ACPI_TYPE_LOCAL_REFERENCE: + /* + * We copied the reference object, so we now must add a reference + * to the object pointed to by the reference + * + * DDBHandle reference (from Load/load_table) is a special reference, + * it does not have a Reference.Object, so does not need to + * increase the reference count + */ + if (source_desc->reference.class == ACPI_REFCLASS_TABLE) { + break; + } + + acpi_ut_add_reference(source_desc->reference.object); + break; + + case ACPI_TYPE_REGION: + /* + * We copied the Region Handler, so we now must add a reference + */ + if (dest_desc->region.handler) { + acpi_ut_add_reference(dest_desc->region.handler); + } + break; + + /* + * For Mutex and Event objects, we cannot simply copy the underlying + * OS object. We must create a new one. + */ + case ACPI_TYPE_MUTEX: + + status = acpi_os_create_mutex(&dest_desc->mutex.os_mutex); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + case ACPI_TYPE_EVENT: + + status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, + &dest_desc->event. + os_semaphore); + if (ACPI_FAILURE(status)) { + return (status); + } + break; + + default: + + /* Nothing to do for other simple objects */ + + break; + } + + return (AE_OK); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_ielement_to_ielement + * + * PARAMETERS: acpi_pkg_callback + * + * RETURN: Status + * + * DESCRIPTION: Copy one package element to another package element + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_ielement_to_ielement(u8 object_type, + union acpi_operand_object *source_object, + union acpi_generic_state *state, + void *context) +{ + acpi_status status = AE_OK; + u32 this_index; + union acpi_operand_object **this_target_ptr; + union acpi_operand_object *target_object; + + ACPI_FUNCTION_ENTRY(); + + this_index = state->pkg.index; + this_target_ptr = (union acpi_operand_object **) + &state->pkg.dest_object->package.elements[this_index]; + + switch (object_type) { + case ACPI_COPY_TYPE_SIMPLE: + + /* A null source object indicates a (legal) null package element */ + + if (source_object) { + /* + * This is a simple object, just copy it + */ + target_object = + acpi_ut_create_internal_object(source_object-> + common.type); + if (!target_object) { + return (AE_NO_MEMORY); + } + + status = + acpi_ut_copy_simple_object(source_object, + target_object); + if (ACPI_FAILURE(status)) { + goto error_exit; + } + + *this_target_ptr = target_object; + } else { + /* Pass through a null element */ + + *this_target_ptr = NULL; + } + break; + + case ACPI_COPY_TYPE_PACKAGE: + /* + * This object is a package - go down another nesting level + * Create and build the package object + */ + target_object = + acpi_ut_create_package_object(source_object->package.count); + if (!target_object) { + return (AE_NO_MEMORY); + } + + target_object->common.flags = source_object->common.flags; + + /* 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 */ + + *this_target_ptr = target_object; + break; + + default: + + return (AE_BAD_PARAMETER); + } + + return (status); + +error_exit: + acpi_ut_remove_reference(target_object); + return (status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_ipackage_to_ipackage + * + * PARAMETERS: source_obj - Pointer to the source package object + * dest_obj - Where the internal object is returned + * walk_state - Current Walk state descriptor + * + * RETURN: Status + * + * DESCRIPTION: This function is called to copy an internal package object + * into another internal package object. + * + ******************************************************************************/ + +static acpi_status +acpi_ut_copy_ipackage_to_ipackage(union acpi_operand_object *source_obj, + union acpi_operand_object *dest_obj, + struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ut_copy_ipackage_to_ipackage); + + dest_obj->common.type = source_obj->common.type; + dest_obj->common.flags = source_obj->common.flags; + dest_obj->package.count = source_obj->package.count; + + /* + * Create the object array and walk the source package tree + */ + dest_obj->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) + source_obj->package. + count + + 1) * sizeof(void *)); + if (!dest_obj->package.elements) { + ACPI_ERROR((AE_INFO, "Package allocation failure")); + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* + * Copy the package element-by-element by walking the package "tree". + * This handles nested packages of arbitrary depth. + */ + status = acpi_ut_walk_package_tree(source_obj, dest_obj, + acpi_ut_copy_ielement_to_ielement, + walk_state); + if (ACPI_FAILURE(status)) { + + /* On failure, delete the destination package object */ + + acpi_ut_remove_reference(dest_obj); + } + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ut_copy_iobject_to_iobject + * + * PARAMETERS: source_desc - The internal object to be copied + * dest_desc - Where the copied object is returned + * walk_state - Current walk state + * + * RETURN: Status + * + * DESCRIPTION: Copy an internal object to a new internal object + * + ******************************************************************************/ + +acpi_status +acpi_ut_copy_iobject_to_iobject(union acpi_operand_object *source_desc, + union acpi_operand_object **dest_desc, + struct acpi_walk_state *walk_state) +{ + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ut_copy_iobject_to_iobject); + + /* Create the top level object */ + + *dest_desc = acpi_ut_create_internal_object(source_desc->common.type); + if (!*dest_desc) { + return_ACPI_STATUS(AE_NO_MEMORY); + } + + /* Copy the object and possible subobjects */ + + if (source_desc->common.type == ACPI_TYPE_PACKAGE) { + status = + acpi_ut_copy_ipackage_to_ipackage(source_desc, *dest_desc, + walk_state); + } else { + status = acpi_ut_copy_simple_object(source_desc, *dest_desc); + } + + /* Delete the allocated object if copy failed */ + + if (ACPI_FAILURE(status)) { + acpi_ut_remove_reference(*dest_desc); + } + + return_ACPI_STATUS(status); +} |