drivers/acpi/dispatcher/dsinit.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dsinit - Object initialization namespace walk
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2006, 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 #include <acpi/acpi.h>
  45 #include <acpi/acdispat.h>
  46 #include <acpi/acnamesp.h>
  47
  48 #define _COMPONENT          ACPI_DISPATCHER
  49 ACPI_MODULE_NAME("dsinit")
  50
  51 /* Local prototypes */
  52 static acpi_status
  53 acpi_ds_init_one_object(acpi_handle obj_handle,
  54                         u32 level, void *context, void **return_value);
  55
  56 /*******************************************************************************
  57  *
  58  * FUNCTION:    acpi_ds_init_one_object
  59  *
  60  * PARAMETERS:  obj_handle      - Node for the object
  61  *              Level           - Current nesting level
  62  *              Context         - Points to a init info struct
  63  *              return_value    - Not used
  64  *
  65  * RETURN:      Status
  66  *
  67  * DESCRIPTION: Callback from acpi_walk_namespace. Invoked for every object
  68  *              within the namespace.
  69  *
  70  *              Currently, the only objects that require initialization are:
  71  *              1) Methods
  72  *              2) Operation Regions
  73  *
  74  ******************************************************************************/
  75
  76 static acpi_status
  77 acpi_ds_init_one_object(acpi_handle obj_handle,
  78                         u32 level, void *context, void **return_value)
  79 {
  80         struct acpi_init_walk_info *info =
  81             (struct acpi_init_walk_info *)context;
  82         struct acpi_namespace_node *node =
  83             (struct acpi_namespace_node *)obj_handle;
  84         acpi_object_type type;
  85         acpi_status status;
  86
  87         ACPI_FUNCTION_ENTRY();
  88
  89         /*
  90          * We are only interested in NS nodes owned by the table that
  91          * was just loaded
  92          */
  93         if (node->owner_id != info->table_desc->owner_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_EXCEPTION((AE_INFO, status,
 109                                         "During Region initialization %p [%4.4s]",
 110                                         obj_handle,
 111                                         acpi_ut_get_node_name(obj_handle)));
 112                 }
 113
 114                 info->op_region_count++;
 115                 break;
 116
 117         case ACPI_TYPE_METHOD:
 118
 119                 /*
 120                  * Set the execution data width (32 or 64) based upon the
 121                  * revision number of the parent ACPI table.
 122                  * TBD: This is really for possible future support of integer width
 123                  * on a per-table basis. Currently, we just use a global for the width.
 124                  */
 125                 if (info->table_desc->pointer->revision == 1) {
 126                         node->flags |= ANOBJ_DATA_WIDTH_32;
 127                 }
 128 #ifdef ACPI_INIT_PARSE_METHODS
 129                 /*
 130                  * Note 11/2005: Removed this code to parse all methods during table
 131                  * load because it causes problems if there are any errors during the
 132                  * parse. Also, it seems like overkill and we probably don't want to
 133                  * abort a table load because of an issue with a single method.
 134                  */
 135
 136                 /*
 137                  * Print a dot for each method unless we are going to print
 138                  * the entire pathname
 139                  */
 140                 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
 141                         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "."));
 142                 }
 143
 144                 /*
 145                  * Always parse methods to detect errors, we will delete
 146                  * the parse tree below
 147                  */
 148                 status = acpi_ds_parse_method(obj_handle);
 149                 if (ACPI_FAILURE(status)) {
 150                         ACPI_ERROR((AE_INFO,
 151                                     "Method %p [%4.4s] - parse failure, %s",
 152                                     obj_handle,
 153                                     acpi_ut_get_node_name(obj_handle),
 154                                     acpi_format_exception(status)));
 155
 156                         /* This parse failed, but we will continue parsing more methods */
 157                 }
 158 #endif
 159                 info->method_count++;
 160                 break;
 161
 162         case ACPI_TYPE_DEVICE:
 163
 164                 info->device_count++;
 165                 break;
 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  * FUNCTION:    acpi_ds_initialize_objects
 181  *
 182  * PARAMETERS:  table_desc      - Descriptor for parent ACPI table
 183  *              start_node      - Root of subtree to be initialized.
 184  *
 185  * RETURN:      Status
 186  *
 187  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
 188  *              necessary initialization on the objects found therein
 189  *
 190  ******************************************************************************/
 191
 192 acpi_status
 193 acpi_ds_initialize_objects(struct acpi_table_desc * table_desc,
 194                            struct acpi_namespace_node * start_node)
 195 {
 196         acpi_status status;
 197         struct acpi_init_walk_info info;
 198
 199         ACPI_FUNCTION_TRACE(ds_initialize_objects);
 200
 201         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 202                           "**** Starting initialization of namespace objects ****\n"));
 203         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT, "Parsing all Control Methods:"));
 204
 205         info.method_count = 0;
 206         info.op_region_count = 0;
 207         info.object_count = 0;
 208         info.device_count = 0;
 209         info.table_desc = table_desc;
 210
 211         /* Walk entire namespace from the supplied root */
 212
 213         status = acpi_walk_namespace(ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
 214                                      acpi_ds_init_one_object, &info, NULL);
 215         if (ACPI_FAILURE(status)) {
 216                 ACPI_EXCEPTION((AE_INFO, status, "During WalkNamespace"));
 217         }
 218
 219         ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
 220                               "\nTable [%4.4s](id %4.4X) - %hd Objects with %hd Devices %hd Methods %hd Regions\n",
 221                               table_desc->pointer->signature,
 222                               table_desc->owner_id, info.object_count,
 223                               info.device_count, info.method_count,
 224                               info.op_region_count));
 225
 226         ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
 227                           "%hd Methods, %hd Regions\n", info.method_count,
 228                           info.op_region_count));
 229
 230         return_ACPI_STATUS(AE_OK);
 231 }