/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
 73acpi_status
 74acpi_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
193acpi_status
194acpi_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