dsinit.c revision 281075 
1/******************************************************************************
2 *
3 * Module Name: dsinit - Object initialization namespace walk
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2015, Intel Corp.
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 <contrib/dev/acpica/include/acpi.h>
45#include <contrib/dev/acpica/include/accommon.h>
46#include <contrib/dev/acpica/include/acdispat.h>
47#include <contrib/dev/acpica/include/acnamesp.h>
48#include <contrib/dev/acpica/include/actables.h>
49
50#define _COMPONENT          ACPI_DISPATCHER
51        ACPI_MODULE_NAME    ("dsinit")
52
53
54/* Local prototypes */
55
56static ACPI_STATUS
57AcpiDsInitOneObject (
58    ACPI_HANDLE             ObjHandle,
59    UINT32                  Level,
60    void                    *Context,
61    void                    **ReturnValue);
62
63
64/*******************************************************************************
65 *
66 * FUNCTION:    AcpiDsInitOneObject
67 *
68 * PARAMETERS:  ObjHandle       - Node for the object
69 *              Level           - Current nesting level
70 *              Context         - Points to a init info struct
71 *              ReturnValue     - Not used
72 *
73 * RETURN:      Status
74 *
75 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
76 *              within the namespace.
77 *
78 *              Currently, the only objects that require initialization are:
79 *              1) Methods
80 *              2) Operation Regions
81 *
82 ******************************************************************************/
83
84static ACPI_STATUS
85AcpiDsInitOneObject (
86    ACPI_HANDLE             ObjHandle,
87    UINT32                  Level,
88    void                    *Context,
89    void                    **ReturnValue)
90{
91    ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
92    ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
93    ACPI_STATUS             Status;
94    ACPI_OPERAND_OBJECT     *ObjDesc;
95
96
97    ACPI_FUNCTION_ENTRY ();
98
99
100    /*
101     * We are only interested in NS nodes owned by the table that
102     * was just loaded
103     */
104    if (Node->OwnerId != Info->OwnerId)
105    {
106        return (AE_OK);
107    }
108
109    Info->ObjectCount++;
110
111    /* And even then, we are only interested in a few object types */
112
113    switch (AcpiNsGetType (ObjHandle))
114    {
115    case ACPI_TYPE_REGION:
116
117        Status = AcpiDsInitializeRegion (ObjHandle);
118        if (ACPI_FAILURE (Status))
119        {
120            ACPI_EXCEPTION ((AE_INFO, Status,
121                "During Region initialization %p [%4.4s]",
122                ObjHandle, AcpiUtGetNodeName (ObjHandle)));
123        }
124
125        Info->OpRegionCount++;
126        break;
127
128    case ACPI_TYPE_METHOD:
129        /*
130         * Auto-serialization support. We will examine each method that is
131         * NotSerialized to determine if it creates any Named objects. If
132         * it does, it will be marked serialized to prevent problems if
133         * the method is entered by two or more threads and an attempt is
134         * made to create the same named object twice -- which results in
135         * an AE_ALREADY_EXISTS exception and method abort.
136         */
137        Info->MethodCount++;
138        ObjDesc = AcpiNsGetAttachedObject (Node);
139        if (!ObjDesc)
140        {
141            break;
142        }
143
144        /* Ignore if already serialized */
145
146        if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
147        {
148            Info->SerialMethodCount++;
149            break;
150        }
151
152        if (AcpiGbl_AutoSerializeMethods)
153        {
154            /* Parse/scan method and serialize it if necessary */
155
156            AcpiDsAutoSerializeMethod (Node, ObjDesc);
157            if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
158            {
159                /* Method was just converted to Serialized */
160
161                Info->SerialMethodCount++;
162                Info->SerializedMethodCount++;
163                break;
164            }
165        }
166
167        Info->NonSerialMethodCount++;
168        break;
169
170    case ACPI_TYPE_DEVICE:
171
172        Info->DeviceCount++;
173        break;
174
175    default:
176
177        break;
178    }
179
180    /*
181     * We ignore errors from above, and always return OK, since
182     * we don't want to abort the walk on a single error.
183     */
184    return (AE_OK);
185}
186
187
188/*******************************************************************************
189 *
190 * FUNCTION:    AcpiDsInitializeObjects
191 *
192 * PARAMETERS:  TableDesc       - Descriptor for parent ACPI table
193 *              StartNode       - Root of subtree to be initialized.
194 *
195 * RETURN:      Status
196 *
197 * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
198 *              necessary initialization on the objects found therein
199 *
200 ******************************************************************************/
201
202ACPI_STATUS
203AcpiDsInitializeObjects (
204    UINT32                  TableIndex,
205    ACPI_NAMESPACE_NODE     *StartNode)
206{
207    ACPI_STATUS             Status;
208    ACPI_INIT_WALK_INFO     Info;
209    ACPI_TABLE_HEADER       *Table;
210    ACPI_OWNER_ID           OwnerId;
211
212
213    ACPI_FUNCTION_TRACE (DsInitializeObjects);
214
215
216    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
217    if (ACPI_FAILURE (Status))
218    {
219        return_ACPI_STATUS (Status);
220    }
221
222    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
223        "**** Starting initialization of namespace objects ****\n"));
224
225    /* Set all init info to zero */
226
227    ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
228
229    Info.OwnerId = OwnerId;
230    Info.TableIndex = TableIndex;
231
232    /* Walk entire namespace from the supplied root */
233
234    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
235    if (ACPI_FAILURE (Status))
236    {
237        return_ACPI_STATUS (Status);
238    }
239
240    /*
241     * We don't use AcpiWalkNamespace since we do not want to acquire
242     * the namespace reader lock.
243     */
244    Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
245                ACPI_NS_WALK_UNLOCK, AcpiDsInitOneObject, NULL, &Info, NULL);
246    if (ACPI_FAILURE (Status))
247    {
248        ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
249    }
250    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
251
252    Status = AcpiGetTableByIndex (TableIndex, &Table);
253    if (ACPI_FAILURE (Status))
254    {
255        return_ACPI_STATUS (Status);
256    }
257
258    ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
259        "Table [%4.4s] (id %4.4X) - %4u Objects with %3u Devices, "
260        "%3u Regions, %3u Methods (%u/%u/%u Serial/Non/Cvt)\n",
261        Table->Signature, OwnerId, Info.ObjectCount, Info.DeviceCount,
262        Info.OpRegionCount, Info.MethodCount, Info.SerialMethodCount,
263        Info.NonSerialMethodCount, Info.SerializedMethodCount));
264
265    ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "%u Methods, %u Regions\n",
266        Info.MethodCount, Info.OpRegionCount));
267
268    return_ACPI_STATUS (AE_OK);
269}
270