1 files changed, 677 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/utobject.c b/drivers/acpi/acpica/utobject.c
new file mode 100644
index 00000000000..fd5ea7543e5
--- /dev/null
+++ b/drivers/acpi/acpica/utobject.c
@@ -0,0 +1,677 @@
+/******************************************************************************
+ *
+ * Module Name: utobject - ACPI object create/delete/size/cache routines
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2008, 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("utobject")
+
+/* Local prototypes */
+static acpi_status
+acpi_ut_get_simple_object_size(union acpi_operand_object *obj,
+                               acpi_size * obj_length);
+
+static acpi_status
+acpi_ut_get_package_object_size(union acpi_operand_object *obj,
+                                acpi_size * obj_length);
+
+static acpi_status
+acpi_ut_get_element_length(u8 object_type,
+                           union acpi_operand_object *source_object,
+                           union acpi_generic_state *state, void *context);
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_create_internal_object_dbg
+ *
+ * PARAMETERS:  module_name         - Source file name of caller
+ *              line_number         - Line number of caller
+ *              component_id        - Component type of caller
+ *              Type                - ACPI Type of the new object
+ *
+ * RETURN:      A new internal object, null on failure
+ *
+ * DESCRIPTION: Create and initialize a new internal object.
+ *
+ * NOTE:        We always allocate the worst-case object descriptor because
+ *              these objects are cached, and we want them to be
+ *              one-size-satisifies-any-request.  This in itself may not be
+ *              the most memory efficient, but the efficiency of the object
+ *              cache should more than make up for this!
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ut_create_internal_object_dbg(const char
+                                                              *module_name,
+                                                              u32 line_number,
+                                                              u32 component_id,
+                                                              acpi_object_type
+                                                              type)
+{
+        union acpi_operand_object *object;
+        union acpi_operand_object *second_object;
+
+        ACPI_FUNCTION_TRACE_STR(ut_create_internal_object_dbg,
+                                acpi_ut_get_type_name(type));
+
+        /* Allocate the raw object descriptor */
+
+        object =
+            acpi_ut_allocate_object_desc_dbg(module_name, line_number,
+                                             component_id);
+        if (!object) {
+                return_PTR(NULL);
+        }
+
+        switch (type) {
+        case ACPI_TYPE_REGION:
+        case ACPI_TYPE_BUFFER_FIELD:
+        case ACPI_TYPE_LOCAL_BANK_FIELD:
+
+                /* These types require a secondary object */
+
+                second_object = acpi_ut_allocate_object_desc_dbg(module_name,
+                                                                 line_number,
+                                                                 component_id);
+                if (!second_object) {
+                        acpi_ut_delete_object_desc(object);
+                        return_PTR(NULL);
+                }
+
+                second_object->common.type = ACPI_TYPE_LOCAL_EXTRA;
+                second_object->common.reference_count = 1;
+
+                /* Link the second object to the first */
+
+                object->common.next_object = second_object;
+                break;
+
+        default:
+                /* All others have no secondary object */
+                break;
+        }
+
+        /* Save the object type in the object descriptor */
+
+        object->common.type = (u8) type;
+
+        /* Init the reference count */
+
+        object->common.reference_count = 1;
+
+        /* Any per-type initialization should go here */
+
+        return_PTR(object);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_create_package_object
+ *
+ * PARAMETERS:  Count               - Number of package elements
+ *
+ * RETURN:      Pointer to a new Package object, null on failure
+ *
+ * DESCRIPTION: Create a fully initialized package object
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ut_create_package_object(u32 count)
+{
+        union acpi_operand_object *package_desc;
+        union acpi_operand_object **package_elements;
+
+        ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count);
+
+        /* Create a new Package object */
+
+        package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
+        if (!package_desc) {
+                return_PTR(NULL);
+        }
+
+        /*
+         * Create the element array. Count+1 allows the array to be null
+         * terminated.
+         */
+        package_elements = ACPI_ALLOCATE_ZEROED(((acpi_size) count +
+                                                 1) * sizeof(void *));
+        if (!package_elements) {
+                acpi_ut_remove_reference(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
+ *
+ * PARAMETERS:  buffer_size            - Size of buffer to be created
+ *
+ * RETURN:      Pointer to a new Buffer object, null on failure
+ *
+ * DESCRIPTION: Create a fully initialized buffer object
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
+{
+        union acpi_operand_object *buffer_desc;
+        u8 *buffer = NULL;
+
+        ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size);
+
+        /* Create a new Buffer object */
+
+        buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
+        if (!buffer_desc) {
+                return_PTR(NULL);
+        }
+
+        /* Create an actual buffer only if size > 0 */
+
+        if (buffer_size > 0) {
+
+                /* Allocate the actual buffer */
+
+                buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
+                if (!buffer) {
+                        ACPI_ERROR((AE_INFO, "Could not allocate size %X",
+                                    (u32) buffer_size));
+                        acpi_ut_remove_reference(buffer_desc);
+                        return_PTR(NULL);
+                }
+        }
+
+        /* Complete buffer object initialization */
+
+        buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
+        buffer_desc->buffer.pointer = buffer;
+        buffer_desc->buffer.length = (u32) buffer_size;
+
+        /* Return the new buffer descriptor */
+
+        return_PTR(buffer_desc);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_create_string_object
+ *
+ * PARAMETERS:  string_size         - Size of string to be created. Does not
+ *                                    include NULL terminator, this is added
+ *                                    automatically.
+ *
+ * RETURN:      Pointer to a new String object
+ *
+ * DESCRIPTION: Create a fully initialized string object
+ *
+ ******************************************************************************/
+
+union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
+{
+        union acpi_operand_object *string_desc;
+        char *string;
+
+        ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size);
+
+        /* Create a new String object */
+
+        string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING);
+        if (!string_desc) {
+                return_PTR(NULL);
+        }
+
+        /*
+         * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
+         * NOTE: Zero-length strings are NULL terminated
+         */
+        string = ACPI_ALLOCATE_ZEROED(string_size + 1);
+        if (!string) {
+                ACPI_ERROR((AE_INFO, "Could not allocate size %X",
+                            (u32) string_size));
+                acpi_ut_remove_reference(string_desc);
+                return_PTR(NULL);
+        }
+
+        /* Complete string object initialization */
+
+        string_desc->string.pointer = string;
+        string_desc->string.length = (u32) string_size;
+
+        /* Return the new string descriptor */
+
+        return_PTR(string_desc);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_valid_internal_object
+ *
+ * PARAMETERS:  Object              - Object to be validated
+ *
+ * RETURN:      TRUE if object is valid, FALSE otherwise
+ *
+ * DESCRIPTION: Validate a pointer to be a union acpi_operand_object
+ *
+ ******************************************************************************/
+
+u8 acpi_ut_valid_internal_object(void *object)
+{
+
+        ACPI_FUNCTION_NAME(ut_valid_internal_object);
+
+        /* Check for a null pointer */
+
+        if (!object) {
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "**** Null Object Ptr\n"));
+                return (FALSE);
+        }
+
+        /* Check the descriptor type field */
+
+        switch (ACPI_GET_DESCRIPTOR_TYPE(object)) {
+        case ACPI_DESC_TYPE_OPERAND:
+
+                /* The object appears to be a valid union acpi_operand_object    */
+
+                return (TRUE);
+
+        default:
+                ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+                                  "%p is not not an ACPI operand obj [%s]\n",
+                                  object, acpi_ut_get_descriptor_name(object)));
+                break;
+        }
+
+        return (FALSE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_allocate_object_desc_dbg
+ *
+ * PARAMETERS:  module_name         - Caller's module name (for error output)
+ *              line_number         - Caller's line number (for error output)
+ *              component_id        - Caller's component ID (for error output)
+ *
+ * RETURN:      Pointer to newly allocated object descriptor.  Null on error
+ *
+ * DESCRIPTION: Allocate a new object descriptor.  Gracefully handle
+ *              error conditions.
+ *
+ ******************************************************************************/
+
+void *acpi_ut_allocate_object_desc_dbg(const char *module_name,
+                                       u32 line_number, u32 component_id)
+{
+        union acpi_operand_object *object;
+
+        ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg);
+
+        object = acpi_os_acquire_object(acpi_gbl_operand_cache);
+        if (!object) {
+                ACPI_ERROR((module_name, line_number,
+                            "Could not allocate an object descriptor"));
+
+                return_PTR(NULL);
+        }
+
+        /* Mark the descriptor type */
+
+        memset(object, 0, sizeof(union acpi_operand_object));
+        ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND);
+
+        ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
+                          object, (u32) sizeof(union acpi_operand_object)));
+
+        return_PTR(object);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_delete_object_desc
+ *
+ * PARAMETERS:  Object          - An Acpi internal object to be deleted
+ *
+ * RETURN:      None.
+ *
+ * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
+ *
+ ******************************************************************************/
+
+void acpi_ut_delete_object_desc(union acpi_operand_object *object)
+{
+        ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object);
+
+        /* Object must be a union acpi_operand_object    */
+
+        if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
+                ACPI_ERROR((AE_INFO,
+                            "%p is not an ACPI Operand object [%s]", object,
+                            acpi_ut_get_descriptor_name(object)));
+                return_VOID;
+        }
+
+        (void)acpi_os_release_object(acpi_gbl_operand_cache, object);
+        return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_simple_object_size
+ *
+ * PARAMETERS:  internal_object    - An ACPI operand object
+ *              obj_length         - Where the length is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to determine the space required to
+ *              contain a simple object for return to an external user.
+ *
+ *              The length includes the object structure plus any additional
+ *              needed space.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
+                               acpi_size * obj_length)
+{
+        acpi_size length;
+        acpi_size size;
+        acpi_status status = AE_OK;
+
+        ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);
+
+        /*
+         * Handle a null object (Could be a uninitialized package
+         * element -- which is legal)
+         */
+        if (!internal_object) {
+                *obj_length = sizeof(union acpi_object);
+                return_ACPI_STATUS(AE_OK);
+        }
+
+        /* Start with the length of the Acpi object */
+
+        length = sizeof(union acpi_object);
+
+        if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {
+
+                /* Object is a named object (reference), just return the length */
+
+                *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
+                return_ACPI_STATUS(status);
+        }
+
+        /*
+         * The final length depends on the object type
+         * Strings and Buffers are packed right up against the parent object and
+         * must be accessed bytewise or there may be alignment problems on
+         * certain processors
+         */
+        switch (ACPI_GET_OBJECT_TYPE(internal_object)) {
+        case ACPI_TYPE_STRING:
+
+                length += (acpi_size) internal_object->string.length + 1;
+                break;
+
+        case ACPI_TYPE_BUFFER:
+
+                length += (acpi_size) internal_object->buffer.length;
+                break;
+
+        case ACPI_TYPE_INTEGER:
+        case ACPI_TYPE_PROCESSOR:
+        case ACPI_TYPE_POWER:
+
+                /* No extra data for these types */
+
+                break;
+
+        case ACPI_TYPE_LOCAL_REFERENCE:
+
+                switch (internal_object->reference.class) {
+                case ACPI_REFCLASS_NAME:
+
+                        /*
+                         * Get the actual length of the full pathname to this object.
+                         * The reference will be converted to the pathname to the object
+                         */
+                        size =
+                            acpi_ns_get_pathname_length(internal_object->
+                                                        reference.node);
+                        if (!size) {
+                                return_ACPI_STATUS(AE_BAD_PARAMETER);
+                        }
+
+                        length += ACPI_ROUND_UP_TO_NATIVE_WORD(size);
+                        break;
+
+                default:
+
+                        /*
+                         * No other reference opcodes are supported.
+                         * Notably, Locals and Args are not supported, but this may be
+                         * required eventually.
+                         */
+                        ACPI_ERROR((AE_INFO,
+                                    "Cannot convert to external object - "
+                                    "unsupported Reference Class [%s] %X in object %p",
+                                    acpi_ut_get_reference_name(internal_object),
+                                    internal_object->reference.class,
+                                    internal_object));
+                        status = AE_TYPE;
+                        break;
+                }
+                break;
+
+        default:
+
+                ACPI_ERROR((AE_INFO, "Cannot convert to external object - "
+                            "unsupported type [%s] %X in object %p",
+                            acpi_ut_get_object_type_name(internal_object),
+                            ACPI_GET_OBJECT_TYPE(internal_object),
+                            internal_object));
+                status = AE_TYPE;
+                break;
+        }
+
+        /*
+         * Account for the space required by the object rounded up to the next
+         * multiple of the machine word size.  This keeps each object aligned
+         * on a machine word boundary. (preventing alignment faults on some
+         * machines.)
+         */
+        *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_element_length
+ *
+ * PARAMETERS:  acpi_pkg_callback
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Get the length of one package element.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_get_element_length(u8 object_type,
+                           union acpi_operand_object *source_object,
+                           union acpi_generic_state *state, void *context)
+{
+        acpi_status status = AE_OK;
+        struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
+        acpi_size object_space;
+
+        switch (object_type) {
+        case ACPI_COPY_TYPE_SIMPLE:
+
+                /*
+                 * Simple object - just get the size (Null object/entry is handled
+                 * here also) and sum it into the running package length
+                 */
+                status =
+                    acpi_ut_get_simple_object_size(source_object,
+                                                   &object_space);
+                if (ACPI_FAILURE(status)) {
+                        return (status);
+                }
+
+                info->length += object_space;
+                break;
+
+        case ACPI_COPY_TYPE_PACKAGE:
+
+                /* Package object - nothing much to do here, let the walk handle it */
+
+                info->num_packages++;
+                state->pkg.this_target_obj = NULL;
+                break;
+
+        default:
+
+                /* No other types allowed */
+
+                return (AE_BAD_PARAMETER);
+        }
+
+        return (status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_package_object_size
+ *
+ * PARAMETERS:  internal_object     - An ACPI internal object
+ *              obj_length          - Where the length is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to determine the space required to
+ *              contain a package object for return to an external user.
+ *
+ *              This is moderately complex since a package contains other
+ *              objects including packages.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_ut_get_package_object_size(union acpi_operand_object *internal_object,
+                                acpi_size * obj_length)
+{
+        acpi_status status;
+        struct acpi_pkg_info info;
+
+        ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object);
+
+        info.length = 0;
+        info.object_space = 0;
+        info.num_packages = 1;
+
+        status = acpi_ut_walk_package_tree(internal_object, NULL,
+                                           acpi_ut_get_element_length, &info);
+        if (ACPI_FAILURE(status)) {
+                return_ACPI_STATUS(status);
+        }
+
+        /*
+         * We have handled all of the objects in all levels of the package.
+         * just add the length of the package objects themselves.
+         * Round up to the next machine word.
+         */
+        info.length += ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) *
+            (acpi_size) info.num_packages;
+
+        /* Return the total package length */
+
+        *obj_length = info.length;
+        return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ut_get_object_size
+ *
+ * PARAMETERS:  internal_object     - An ACPI internal object
+ *              obj_length          - Where the length will be returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: This function is called to determine the space required to
+ *              contain an object for return to an API user.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ut_get_object_size(union acpi_operand_object *internal_object,
+                        acpi_size * obj_length)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_ENTRY();
+
+        if ((ACPI_GET_DESCRIPTOR_TYPE(internal_object) ==
+             ACPI_DESC_TYPE_OPERAND)
+            && (ACPI_GET_OBJECT_TYPE(internal_object) == ACPI_TYPE_PACKAGE)) {
+                status =
+                    acpi_ut_get_package_object_size(internal_object,
+                                                    obj_length);
+        } else {
+                status =
+                    acpi_ut_get_simple_object_size(internal_object, obj_length);
+        }
+
+        return (status);
+}