git.oblomov.eu Git - linux-2.6/blob - 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 /* Local prototypes */
  53
  54 static acpi_status
  55 acpi_ds_init_one_object (
  56         acpi_handle                     obj_handle,
  57         u32                             level,
  58         void                            *context,
  59         void                            **return_value);
  60
  61
  62 /*******************************************************************************
  63  *
  64  * FUNCTION:    acpi_ds_init_one_object
  65  *
  66  * PARAMETERS:  obj_handle      - Node for the object
  67  *              Level           - Current nesting level
  68  *              Context         - Points to a init info struct
  69  *              return_value    - Not used
  70  *
  71  * RETURN:      Status
  72  *
  73  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
  74  *              within the namespace.
  75  *
  76  *              Currently, the only objects that require initialization are:
  77  *              1) Methods
  78  *              2) Operation Regions
  79  *
  80  ******************************************************************************/
  81
  82 static acpi_status
  83 acpi_ds_init_one_object (
  84         acpi_handle                     obj_handle,
  85         u32                             level,
  86         void                            *context,
  87         void                            **return_value)
  88 {
  89         acpi_object_type                type;
  90         acpi_status                     status;
  91         struct acpi_init_walk_info      *info = (struct acpi_init_walk_info *) context;
  92
  93
  94         ACPI_FUNCTION_NAME ("ds_init_one_object");
  95
  96
  97         /*
  98          * We are only interested in objects owned by the table that
  99          * was just loaded
 100          */
 101         if (((struct acpi_namespace_node *) obj_handle)->owner_id !=
 102                         info->table_desc->table_id) {
 103                 return (AE_OK);
 104         }
 105
 106         info->object_count++;
 107
 108         /* And even then, we are only interested in a few object types */
 109
 110         type = acpi_ns_get_type (obj_handle);
 111
 112         switch (type) {
 113         case ACPI_TYPE_REGION:
 114
 115                 status = acpi_ds_initialize_region (obj_handle);
 116                 if (ACPI_FAILURE (status)) {
 117                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 118                                 "Region %p [%4.4s] - Init failure, %s\n",
 119                                 obj_handle, acpi_ut_get_node_name (obj_handle),
 120                                 acpi_format_exception (status)));
 121                 }
 122
 123                 info->op_region_count++;
 124                 break;
 125
 126
 127         case ACPI_TYPE_METHOD:
 128
 129                 info->method_count++;
 130
 131                 /*
 132                  * Print a dot for each method unless we are going to print
 133                  * the entire pathname
 134                  */
 135                 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
 136                         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
 137                 }
 138
 139                 /*
 140                  * Set the execution data width (32 or 64) based upon the
 141                  * revision number of the parent ACPI table.
 142                  * TBD: This is really for possible future support of integer width
 143                  * on a per-table basis. Currently, we just use a global for the width.
 144                  */
 145                 if (info->table_desc->pointer->revision == 1) {
 146                         ((struct acpi_namespace_node *) obj_handle)->flags |= ANOBJ_DATA_WIDTH_32;
 147                 }
 148
 149                 /*
 150                  * Always parse methods to detect errors, we will delete
 151                  * the parse tree below
 152                  */
 153                 status = acpi_ds_parse_method (obj_handle);
 154                 if (ACPI_FAILURE (status)) {
 155                         ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
 156                                 "Method %p [%4.4s] - parse failure, %s\n",
 157                                 obj_handle, acpi_ut_get_node_name (obj_handle),
 158                                 acpi_format_exception (status)));
 159
 160                         /* This parse failed, but we will continue parsing more methods */
 161
 162                         break;
 163                 }
 164
 165                 /*
 166                  * Delete the parse tree.  We simply re-parse the method
 167                  * for every execution since there isn't much overhead
 168                  */
 169                 acpi_ns_delete_namespace_subtree (obj_handle);
 170                 acpi_ns_delete_namespace_by_owner (
 171                         ((struct acpi_namespace_node *) obj_handle)->object->method.owning_id);
 172                 break;
 173
 174
 175         case ACPI_TYPE_DEVICE:
 176
 177                 info->device_count++;
 178                 break;
 179
 180
 181         default:
 182                 break;
 183         }
 184
 185         /*
 186          * We ignore errors from above, and always return OK, since
 187          * we don't want to abort the walk on a single error.
 188          */
 189         return (AE_OK);
 190 }
 191
 192
 193 /*******************************************************************************
 194  *
 195  * FUNCTION:    acpi_ds_initialize_objects
 196  *
 197  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
 198  *              start_node      - Root of subtree to be initialized.
 199  *
 200  * RETURN:      Status
 201  *
 202  * DESCRIPTION: Walk the namespace starting at "start_node" and perform any
 203  *              necessary initialization on the objects found therein
 204  *
 205  ******************************************************************************/
 206
 207 acpi_status
 208 acpi_ds_initialize_objects (
 209         struct acpi_table_desc          *table_desc,
 210         struct acpi_namespace_node      *start_node)
 211 {
 212         acpi_status                     status;
 213         struct acpi_init_walk_info      info;
 214
 215
 216         ACPI_FUNCTION_TRACE ("ds_initialize_objects");
 217
 218
 219         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 220                 "**** Starting initialization of namespace objects ****\n"));
 221         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));
 222
 223         info.method_count   = 0;
 224         info.op_region_count = 0;
 225         info.object_count   = 0;
 226         info.device_count   = 0;
 227         info.table_desc     = table_desc;
 228
 229         /* Walk entire namespace from the supplied root */
 230
 231         status = acpi_walk_namespace (ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
 232                           acpi_ds_init_one_object, &info, NULL);
 233         if (ACPI_FAILURE (status)) {
 234                 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "walk_namespace failed, %s\n",
 235                         acpi_format_exception (status)));
 236         }
 237
 238         ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
 239                 "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
 240                 table_desc->pointer->signature, table_desc->table_id, info.object_count,
 241                 info.device_count, info.method_count, info.op_region_count));
 242
 243         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 244                 "%hd Methods, %hd Regions\n", info.method_count, info.op_region_count));
 245
 246         return_ACPI_STATUS (AE_OK);
 247 }
 248
 249