drivers/acpi/dispatcher/dsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsinit - Object initialization namespace walk
   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/acdispat.h>
  47 #include <acpi/acnamesp.h>
  48
  49 #define _COMPONENT          ACPI_DISPATCHER
  50          ACPI_MODULE_NAME    ("dsinit")
  51
  52
  53 /*******************************************************************************
  54  *
  55  * FUNCTION:    acpi_ds_init_one_object
  56  *
  57  * PARAMETERS:  obj_handle      - Node
  58  *              Level           - Current nesting level
  59  *              Context         - Points to a init info struct
  60  *              return_value    - Not used
  61  *
  62  * RETURN:      Status
  63  *
  64  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
  65  *              within the namespace.
  66  *
  67  *              Currently, the only objects that require initialization are:
  68  *              1) Methods
  69  *              2) Operation Regions
  70  *
  71  ******************************************************************************/
  72
  73 acpi_status
  74 acpi_ds_init_one_object (
  75         acpi_handle                     obj_handle,
  76         u32                             level,
  77         void                            *context,
  78         void                            **return_value)
  79 {
  80         acpi_object_type                type;
  81         acpi_status                     status;
  82         struct acpi_init_walk_info      *info = (struct acpi_init_walk_info *) context;
  83
  84
  85         ACPI_FUNCTION_NAME ("ds_init_one_object");
  86
  87
  88         /*
  89          * We are only interested in objects owned by the table that
  90          * was just loaded
  91          */
  92         if (((struct acpi_namespace_node *) obj_handle)->owner_id !=
  93                         info->table_desc->table_id) {
  94                 return (AE_OK);
  95         }
  96
  97         info->object_count++;
  98
  99         /* And even then, we are only interested in a few object types */
 100
 101         type = acpi_ns_get_type (obj_handle);
 102
 103         switch (type) {
 104         case ACPI_TYPE_REGION:
 105
 106                 status = acpi_ds_initialize_region (obj_handle);
 107                 if (ACPI_FAILURE (status)) {
 108                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region %p [%4.4s] - Init failure, %s\n",
 109                                 obj_handle, acpi_ut_get_node_name (obj_handle),
 110                                 acpi_format_exception (status)));
 111                 }
 112
 113                 info->op_region_count++;
 114                 break;
 115
 116
 117         case ACPI_TYPE_METHOD:
 118
 119                 info->method_count++;
 120
 121                 /* Print a dot for each method unless we are going to print the entire pathname */
 122
 123                 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
 124                         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 125                 }
 126
 127                 /*
 128                  * Set the execution data width (32 or 64) based upon the
 129                  * revision number of the parent ACPI table.
 130                  * TBD: This is really for possible future support of integer width
 131                  * on a per-table basis. Currently, we just use a global for the width.
 132                  */
 133                 if (info->table_desc->pointer->revision == 1) {
 134                         ((struct acpi_namespace_node *) obj_handle)->flags |= ANOBJ_DATA_WIDTH_32;
 135                 }
 136
 137                 /*
 138                  * Always parse methods to detect errors, we will delete
 139                  * the parse tree below
 140                  */
 141                 status = acpi_ds_parse_method (obj_handle);
 142                 if (ACPI_FAILURE (status)) {
 143                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Method %p [%4.4s] - parse failure, %s\n",
 144                                 obj_handle, acpi_ut_get_node_name (obj_handle),
 145                                 acpi_format_exception (status)));
 146
 147                         /* This parse failed, but we will continue parsing more methods */
 148
 149                         break;
 150                 }
 151
 152                 /*
 153                  * Delete the parse tree.  We simply re-parse the method
 154                  * for every execution since there isn't much overhead
 155                  */
 156                 acpi_ns_delete_namespace_subtree (obj_handle);
 157                 acpi_ns_delete_namespace_by_owner (((struct acpi_namespace_node *) obj_handle)->object->method.owning_id);
 158                 break;
 159
 160
 161         case ACPI_TYPE_DEVICE:
 162
 163                 info->device_count++;
 164                 break;
 165
 166
 167         default:
 168                 break;
 169         }
 170
 171         /*
 172          * We ignore errors from above, and always return OK, since
 173          * we don't want to abort the walk on a single error.
 174          */
 175         return (AE_OK);
 176 }
 177
 178
 179 /*******************************************************************************
 180  *
 181  * FUNCTION:    acpi_ds_initialize_objects
 182  *
 183  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
 184  *              start_node      - Root of subtree to be initialized.
 185  *
 186  * RETURN:      Status
 187  *
 188  * DESCRIPTION: Walk the namespace starting at "start_node" and perform any
 189  *              necessary initialization on the objects found therein
 190  *
 191  ******************************************************************************/
 192
 193 acpi_status
 194 acpi_ds_initialize_objects (
 195         struct acpi_table_desc          *table_desc,
 196         struct acpi_namespace_node      *start_node)
 197 {
 198         acpi_status                     status;
 199         struct acpi_init_walk_info      info;
 200
 201
 202         ACPI_FUNCTION_TRACE ("ds_initialize_objects");
 203
 204
 205         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 206                 "**** Starting initialization of namespace objects ****\n"));
 207         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));
 208
 209         info.method_count   = 0;
 210         info.op_region_count = 0;
 211         info.object_count   = 0;
 212         info.device_count   = 0;
 213         info.table_desc     = table_desc;
 214
 215         /* Walk entire namespace from the supplied root */
 216
 217         status = acpi_walk_namespace (ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
 218                           acpi_ds_init_one_object, &info, NULL);
 219         if (ACPI_FAILURE (status)) {
 220                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed, %s\n",
 221                         acpi_format_exception (status)));
 222         }
 223
 224         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 225                 "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
 226                 table_desc->pointer->signature, table_desc->table_id, info.object_count,
 227                 info.device_count, info.method_count, info.op_region_count));
 228
 229         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 230                 "%hd Methods, %hd Regions\n", info.method_count, info.op_region_count));
 231
 232         return_ACPI_STATUS (AE_OK);
 233 }
 234
 235