tbxface.c revision 240716 
1/******************************************************************************
2 *
3 * Module Name: tbxface - ACPI table oriented external interfaces
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2012, 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 __TBXFACE_C__
45
46#include <contrib/dev/acpica/include/acpi.h>
47#include <contrib/dev/acpica/include/accommon.h>
48#include <contrib/dev/acpica/include/actables.h>
49
50#define _COMPONENT          ACPI_TABLES
51        ACPI_MODULE_NAME    ("tbxface")
52
53
54/*******************************************************************************
55 *
56 * FUNCTION:    AcpiAllocateRootTable
57 *
58 * PARAMETERS:  InitialTableCount   - Size of InitialTableArray, in number of
59 *                                    ACPI_TABLE_DESC structures
60 *
61 * RETURN:      Status
62 *
63 * DESCRIPTION: Allocate a root table array. Used by iASL compiler and
64 *              AcpiInitializeTables.
65 *
66 ******************************************************************************/
67
68ACPI_STATUS
69AcpiAllocateRootTable (
70    UINT32                  InitialTableCount)
71{
72
73    AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
74    AcpiGbl_RootTableList.Flags = ACPI_ROOT_ALLOW_RESIZE;
75
76    return (AcpiTbResizeRootTableList ());
77}
78
79
80/*******************************************************************************
81 *
82 * FUNCTION:    AcpiInitializeTables
83 *
84 * PARAMETERS:  InitialTableArray   - Pointer to an array of pre-allocated
85 *                                    ACPI_TABLE_DESC structures. If NULL, the
86 *                                    array is dynamically allocated.
87 *              InitialTableCount   - Size of InitialTableArray, in number of
88 *                                    ACPI_TABLE_DESC structures
89 *              AllowRealloc        - Flag to tell Table Manager if resize of
90 *                                    pre-allocated array is allowed. Ignored
91 *                                    if InitialTableArray is NULL.
92 *
93 * RETURN:      Status
94 *
95 * DESCRIPTION: Initialize the table manager, get the RSDP and RSDT/XSDT.
96 *
97 * NOTE:        Allows static allocation of the initial table array in order
98 *              to avoid the use of dynamic memory in confined environments
99 *              such as the kernel boot sequence where it may not be available.
100 *
101 *              If the host OS memory managers are initialized, use NULL for
102 *              InitialTableArray, and the table will be dynamically allocated.
103 *
104 ******************************************************************************/
105
106ACPI_STATUS
107AcpiInitializeTables (
108    ACPI_TABLE_DESC         *InitialTableArray,
109    UINT32                  InitialTableCount,
110    BOOLEAN                 AllowResize)
111{
112    ACPI_PHYSICAL_ADDRESS   RsdpAddress;
113    ACPI_STATUS             Status;
114
115
116    ACPI_FUNCTION_TRACE (AcpiInitializeTables);
117
118
119    /*
120     * Set up the Root Table Array
121     * Allocate the table array if requested
122     */
123    if (!InitialTableArray)
124    {
125        Status = AcpiAllocateRootTable (InitialTableCount);
126        if (ACPI_FAILURE (Status))
127        {
128            return_ACPI_STATUS (Status);
129        }
130    }
131    else
132    {
133        /* Root Table Array has been statically allocated by the host */
134
135        ACPI_MEMSET (InitialTableArray, 0,
136            (ACPI_SIZE) InitialTableCount * sizeof (ACPI_TABLE_DESC));
137
138        AcpiGbl_RootTableList.Tables = InitialTableArray;
139        AcpiGbl_RootTableList.MaxTableCount = InitialTableCount;
140        AcpiGbl_RootTableList.Flags = ACPI_ROOT_ORIGIN_UNKNOWN;
141        if (AllowResize)
142        {
143            AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE;
144        }
145    }
146
147    /* Get the address of the RSDP */
148
149    RsdpAddress = AcpiOsGetRootPointer ();
150    if (!RsdpAddress)
151    {
152        return_ACPI_STATUS (AE_NOT_FOUND);
153    }
154
155    /*
156     * Get the root table (RSDT or XSDT) and extract all entries to the local
157     * Root Table Array. This array contains the information of the RSDT/XSDT
158     * in a common, more useable format.
159     */
160    Status = AcpiTbParseRootTable (RsdpAddress);
161    return_ACPI_STATUS (Status);
162}
163
164ACPI_EXPORT_SYMBOL (AcpiInitializeTables)
165
166
167/*******************************************************************************
168 *
169 * FUNCTION:    AcpiReallocateRootTable
170 *
171 * PARAMETERS:  None
172 *
173 * RETURN:      Status
174 *
175 * DESCRIPTION: Reallocate Root Table List into dynamic memory. Copies the
176 *              root list from the previously provided scratch area. Should
177 *              be called once dynamic memory allocation is available in the
178 *              kernel.
179 *
180 ******************************************************************************/
181
182ACPI_STATUS
183AcpiReallocateRootTable (
184    void)
185{
186    ACPI_STATUS             Status;
187
188
189    ACPI_FUNCTION_TRACE (AcpiReallocateRootTable);
190
191
192    /*
193     * Only reallocate the root table if the host provided a static buffer
194     * for the table array in the call to AcpiInitializeTables.
195     */
196    if (AcpiGbl_RootTableList.Flags & ACPI_ROOT_ORIGIN_ALLOCATED)
197    {
198        return_ACPI_STATUS (AE_SUPPORT);
199    }
200
201    AcpiGbl_RootTableList.Flags |= ACPI_ROOT_ALLOW_RESIZE;
202
203    Status = AcpiTbResizeRootTableList ();
204    return_ACPI_STATUS (Status);
205}
206
207ACPI_EXPORT_SYMBOL (AcpiReallocateRootTable)
208
209
210/*******************************************************************************
211 *
212 * FUNCTION:    AcpiGetTableHeader
213 *
214 * PARAMETERS:  Signature           - ACPI signature of needed table
215 *              Instance            - Which instance (for SSDTs)
216 *              OutTableHeader      - The pointer to the table header to fill
217 *
218 * RETURN:      Status and pointer to mapped table header
219 *
220 * DESCRIPTION: Finds an ACPI table header.
221 *
222 * NOTE:        Caller is responsible in unmapping the header with
223 *              AcpiOsUnmapMemory
224 *
225 ******************************************************************************/
226
227ACPI_STATUS
228AcpiGetTableHeader (
229    char                    *Signature,
230    UINT32                  Instance,
231    ACPI_TABLE_HEADER       *OutTableHeader)
232{
233    UINT32                  i;
234    UINT32                  j;
235    ACPI_TABLE_HEADER       *Header;
236
237
238    /* Parameter validation */
239
240    if (!Signature || !OutTableHeader)
241    {
242        return (AE_BAD_PARAMETER);
243    }
244
245    /* Walk the root table list */
246
247    for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
248    {
249        if (!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
250                    Signature))
251        {
252            continue;
253        }
254
255        if (++j < Instance)
256        {
257            continue;
258        }
259
260        if (!AcpiGbl_RootTableList.Tables[i].Pointer)
261        {
262            if ((AcpiGbl_RootTableList.Tables[i].Flags &
263                    ACPI_TABLE_ORIGIN_MASK) ==
264                ACPI_TABLE_ORIGIN_MAPPED)
265            {
266                Header = AcpiOsMapMemory (
267                            AcpiGbl_RootTableList.Tables[i].Address,
268                            sizeof (ACPI_TABLE_HEADER));
269                if (!Header)
270                {
271                    return AE_NO_MEMORY;
272                }
273
274                ACPI_MEMCPY (OutTableHeader, Header, sizeof(ACPI_TABLE_HEADER));
275                AcpiOsUnmapMemory (Header, sizeof(ACPI_TABLE_HEADER));
276            }
277            else
278            {
279                return AE_NOT_FOUND;
280            }
281        }
282        else
283        {
284            ACPI_MEMCPY (OutTableHeader,
285                AcpiGbl_RootTableList.Tables[i].Pointer,
286                sizeof(ACPI_TABLE_HEADER));
287        }
288
289        return (AE_OK);
290    }
291
292    return (AE_NOT_FOUND);
293}
294
295ACPI_EXPORT_SYMBOL (AcpiGetTableHeader)
296
297
298/*******************************************************************************
299 *
300 * FUNCTION:    AcpiGetTable
301 *
302 * PARAMETERS:  Signature           - ACPI signature of needed table
303 *              Instance            - Which instance (for SSDTs)
304 *              OutTable            - Where the pointer to the table is returned
305 *
306 * RETURN:      Status and pointer to table
307 *
308 * DESCRIPTION: Finds and verifies an ACPI table.
309 *
310 ******************************************************************************/
311
312ACPI_STATUS
313AcpiGetTable (
314    char                    *Signature,
315    UINT32                  Instance,
316    ACPI_TABLE_HEADER       **OutTable)
317{
318    UINT32                  i;
319    UINT32                  j;
320    ACPI_STATUS             Status;
321
322
323    /* Parameter validation */
324
325    if (!Signature || !OutTable)
326    {
327        return (AE_BAD_PARAMETER);
328    }
329
330    /* Walk the root table list */
331
332    for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
333    {
334        if (!ACPI_COMPARE_NAME (&(AcpiGbl_RootTableList.Tables[i].Signature),
335                Signature))
336        {
337            continue;
338        }
339
340        if (++j < Instance)
341        {
342            continue;
343        }
344
345        Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
346        if (ACPI_SUCCESS (Status))
347        {
348            *OutTable = AcpiGbl_RootTableList.Tables[i].Pointer;
349        }
350
351        return (Status);
352    }
353
354    return (AE_NOT_FOUND);
355}
356
357ACPI_EXPORT_SYMBOL (AcpiGetTable)
358
359
360/*******************************************************************************
361 *
362 * FUNCTION:    AcpiGetTableByIndex
363 *
364 * PARAMETERS:  TableIndex          - Table index
365 *              Table               - Where the pointer to the table is returned
366 *
367 * RETURN:      Status and pointer to the table
368 *
369 * DESCRIPTION: Obtain a table by an index into the global table list.
370 *
371 ******************************************************************************/
372
373ACPI_STATUS
374AcpiGetTableByIndex (
375    UINT32                  TableIndex,
376    ACPI_TABLE_HEADER       **Table)
377{
378    ACPI_STATUS             Status;
379
380
381    ACPI_FUNCTION_TRACE (AcpiGetTableByIndex);
382
383
384    /* Parameter validation */
385
386    if (!Table)
387    {
388        return_ACPI_STATUS (AE_BAD_PARAMETER);
389    }
390
391    (void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
392
393    /* Validate index */
394
395    if (TableIndex >= AcpiGbl_RootTableList.CurrentTableCount)
396    {
397        (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
398        return_ACPI_STATUS (AE_BAD_PARAMETER);
399    }
400
401    if (!AcpiGbl_RootTableList.Tables[TableIndex].Pointer)
402    {
403        /* Table is not mapped, map it */
404
405        Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[TableIndex]);
406        if (ACPI_FAILURE (Status))
407        {
408            (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
409            return_ACPI_STATUS (Status);
410        }
411    }
412
413    *Table = AcpiGbl_RootTableList.Tables[TableIndex].Pointer;
414    (void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
415    return_ACPI_STATUS (AE_OK);
416}
417
418ACPI_EXPORT_SYMBOL (AcpiGetTableByIndex)
419
420
421/*******************************************************************************
422 *
423 * FUNCTION:    AcpiInstallTableHandler
424 *
425 * PARAMETERS:  Handler         - Table event handler
426 *              Context         - Value passed to the handler on each event
427 *
428 * RETURN:      Status
429 *
430 * DESCRIPTION: Install table event handler
431 *
432 ******************************************************************************/
433
434ACPI_STATUS
435AcpiInstallTableHandler (
436    ACPI_TABLE_HANDLER      Handler,
437    void                    *Context)
438{
439    ACPI_STATUS             Status;
440
441
442    ACPI_FUNCTION_TRACE (AcpiInstallTableHandler);
443
444
445    if (!Handler)
446    {
447        return_ACPI_STATUS (AE_BAD_PARAMETER);
448    }
449
450    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
451    if (ACPI_FAILURE (Status))
452    {
453        return_ACPI_STATUS (Status);
454    }
455
456    /* Don't allow more than one handler */
457
458    if (AcpiGbl_TableHandler)
459    {
460        Status = AE_ALREADY_EXISTS;
461        goto Cleanup;
462    }
463
464    /* Install the handler */
465
466    AcpiGbl_TableHandler = Handler;
467    AcpiGbl_TableHandlerContext = Context;
468
469Cleanup:
470    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
471    return_ACPI_STATUS (Status);
472}
473
474ACPI_EXPORT_SYMBOL (AcpiInstallTableHandler)
475
476
477/*******************************************************************************
478 *
479 * FUNCTION:    AcpiRemoveTableHandler
480 *
481 * PARAMETERS:  Handler         - Table event handler that was installed
482 *                                previously.
483 *
484 * RETURN:      Status
485 *
486 * DESCRIPTION: Remove table event handler
487 *
488 ******************************************************************************/
489
490ACPI_STATUS
491AcpiRemoveTableHandler (
492    ACPI_TABLE_HANDLER      Handler)
493{
494    ACPI_STATUS             Status;
495
496
497    ACPI_FUNCTION_TRACE (AcpiRemoveTableHandler);
498
499
500    Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
501    if (ACPI_FAILURE (Status))
502    {
503        return_ACPI_STATUS (Status);
504    }
505
506    /* Make sure that the installed handler is the same */
507
508    if (!Handler ||
509        Handler != AcpiGbl_TableHandler)
510    {
511        Status = AE_BAD_PARAMETER;
512        goto Cleanup;
513    }
514
515    /* Remove the handler */
516
517    AcpiGbl_TableHandler = NULL;
518
519Cleanup:
520    (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
521    return_ACPI_STATUS (Status);
522}
523
524ACPI_EXPORT_SYMBOL (AcpiRemoveTableHandler)
525
526