1 /******************************************************************************
2  *
3  * Module Name: dsinit - Object initialization namespace walk
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2011, 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 #define __DSINIT_C__
45 
46 #include "acpi.h"
47 #include "accommon.h"
48 #include "acdispat.h"
49 #include "acnamesp.h"
50 #include "actables.h"
51 
52 #define _COMPONENT          ACPI_DISPATCHER
53         ACPI_MODULE_NAME    ("dsinit")
54 
55 /* Local prototypes */
56 
57 static ACPI_STATUS
58 AcpiDsInitOneObject (
59     ACPI_HANDLE             ObjHandle,
60     UINT32                  Level,
61     void                    *Context,
62     void                    **ReturnValue);
63 
64 
65 /*******************************************************************************
66  *
67  * FUNCTION:    AcpiDsInitOneObject
68  *
69  * PARAMETERS:  ObjHandle       - Node for the object
70  *              Level           - Current nesting level
71  *              Context         - Points to a init info struct
72  *              ReturnValue     - Not used
73  *
74  * RETURN:      Status
75  *
76  * DESCRIPTION: Callback from AcpiWalkNamespace.  Invoked for every object
77  *              within the namespace.
78  *
79  *              Currently, the only objects that require initialization are:
80  *              1) Methods
81  *              2) Operation Regions
82  *
83  ******************************************************************************/
84 
85 static ACPI_STATUS
86 AcpiDsInitOneObject (
87     ACPI_HANDLE             ObjHandle,
88     UINT32                  Level,
89     void                    *Context,
90     void                    **ReturnValue)
91 {
92     ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
93     ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
94     ACPI_OBJECT_TYPE        Type;
95     ACPI_STATUS             Status;
96 
97 
98     ACPI_FUNCTION_ENTRY ();
99 
100 
101     /*
102      * We are only interested in NS nodes owned by the table that
103      * was just loaded
104      */
105     if (Node->OwnerId != Info->OwnerId)
106     {
107         return (AE_OK);
108     }
109 
110     Info->ObjectCount++;
111 
112     /* And even then, we are only interested in a few object types */
113 
114     Type = AcpiNsGetType (ObjHandle);
115 
116     switch (Type)
117     {
118     case ACPI_TYPE_REGION:
119 
120         Status = AcpiDsInitializeRegion (ObjHandle);
121         if (ACPI_FAILURE (Status))
122         {
123             ACPI_EXCEPTION ((AE_INFO, Status,
124                 "During Region initialization %p [%4.4s]",
125                 ObjHandle, AcpiUtGetNodeName (ObjHandle)));
126         }
127 
128         Info->OpRegionCount++;
129         break;
130 
131 
132     case ACPI_TYPE_METHOD:
133 
134         Info->MethodCount++;
135         break;
136 
137 
138     case ACPI_TYPE_DEVICE:
139 
140         Info->DeviceCount++;
141         break;
142 
143 
144     default:
145         break;
146     }
147 
148     /*
149      * We ignore errors from above, and always return OK, since
150      * we don't want to abort the walk on a single error.
151      */
152     return (AE_OK);
153 }
154 
155 
156 /*******************************************************************************
157  *
158  * FUNCTION:    AcpiDsInitializeObjects
159  *
160  * PARAMETERS:  TableDesc       - Descriptor for parent ACPI table
161  *              StartNode       - Root of subtree to be initialized.
162  *
163  * RETURN:      Status
164  *
165  * DESCRIPTION: Walk the namespace starting at "StartNode" and perform any
166  *              necessary initialization on the objects found therein
167  *
168  ******************************************************************************/
169 
170 ACPI_STATUS
171 AcpiDsInitializeObjects (
172     UINT32                  TableIndex,
173     ACPI_NAMESPACE_NODE     *StartNode)
174 {
175     ACPI_STATUS             Status;
176     ACPI_INIT_WALK_INFO     Info;
177     ACPI_TABLE_HEADER       *Table;
178     ACPI_OWNER_ID           OwnerId;
179 
180 
181     ACPI_FUNCTION_TRACE (DsInitializeObjects);
182 
183 
184     Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
185     if (ACPI_FAILURE (Status))
186     {
187         return_ACPI_STATUS (Status);
188     }
189 
190     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
191         "**** Starting initialization of namespace objects ****\n"));
192     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "Parsing all Control Methods:"));
193 
194     /* Set all init info to zero */
195 
196     ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
197 
198     Info.OwnerId = OwnerId;
199     Info.TableIndex = TableIndex;
200 
201     /* Walk entire namespace from the supplied root */
202 
203     Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
204     if (ACPI_FAILURE (Status))
205     {
206         return_ACPI_STATUS (Status);
207     }
208 
209     /*
210      * We don't use AcpiWalkNamespace since we do not want to acquire
211      * the namespace reader lock.
212      */
213     Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, StartNode, ACPI_UINT32_MAX,
214                 ACPI_NS_WALK_UNLOCK, AcpiDsInitOneObject, NULL, &Info, NULL);
215     if (ACPI_FAILURE (Status))
216     {
217         ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
218     }
219     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
220 
221     Status = AcpiGetTableByIndex (TableIndex, &Table);
222     if (ACPI_FAILURE (Status))
223     {
224         return_ACPI_STATUS (Status);
225     }
226 
227     ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
228         "\nTable [%4.4s](id %4.4X) - %u Objects with %u Devices %u Methods %u Regions\n",
229         Table->Signature, OwnerId, Info.ObjectCount,
230         Info.DeviceCount, Info.MethodCount, Info.OpRegionCount));
231 
232     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
233         "%u Methods, %u Regions\n", Info.MethodCount, Info.OpRegionCount));
234 
235     return_ACPI_STATUS (AE_OK);
236 }
237 
238 
239