1 /******************************************************************************
3 * Module Name: utosi - Support for the _OSI predefined control method
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2013, Intel Corp.
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46 #include <contrib/dev/acpica/include/acpi.h>
47 #include <contrib/dev/acpica/include/accommon.h>
50 #define _COMPONENT ACPI_UTILITIES
51 ACPI_MODULE_NAME ("utosi")
54 * Strings supported by the _OSI predefined control method (which is
55 * implemented internally within this module.)
57 * March 2009: Removed "Linux" as this host no longer wants to respond true
58 * for this string. Basically, the only safe OS strings are windows-related
59 * and in many or most cases represent the only test path within the
60 * BIOS-provided ASL code.
62 * The last element of each entry is used to track the newest version of
63 * Windows that the BIOS has requested.
65 static ACPI_INTERFACE_INFO AcpiDefaultSupportedInterfaces[] =
67 /* Operating System Vendor Strings */
69 {"Windows 2000", NULL, 0, ACPI_OSI_WIN_2000}, /* Windows 2000 */
70 {"Windows 2001", NULL, 0, ACPI_OSI_WIN_XP}, /* Windows XP */
71 {"Windows 2001 SP1", NULL, 0, ACPI_OSI_WIN_XP_SP1}, /* Windows XP SP1 */
72 {"Windows 2001.1", NULL, 0, ACPI_OSI_WINSRV_2003}, /* Windows Server 2003 */
73 {"Windows 2001 SP2", NULL, 0, ACPI_OSI_WIN_XP_SP2}, /* Windows XP SP2 */
74 {"Windows 2001.1 SP1", NULL, 0, ACPI_OSI_WINSRV_2003_SP1}, /* Windows Server 2003 SP1 - Added 03/2006 */
75 {"Windows 2006", NULL, 0, ACPI_OSI_WIN_VISTA}, /* Windows Vista - Added 03/2006 */
76 {"Windows 2006.1", NULL, 0, ACPI_OSI_WINSRV_2008}, /* Windows Server 2008 - Added 09/2009 */
77 {"Windows 2006 SP1", NULL, 0, ACPI_OSI_WIN_VISTA_SP1}, /* Windows Vista SP1 - Added 09/2009 */
78 {"Windows 2006 SP2", NULL, 0, ACPI_OSI_WIN_VISTA_SP2}, /* Windows Vista SP2 - Added 09/2010 */
79 {"Windows 2009", NULL, 0, ACPI_OSI_WIN_7}, /* Windows 7 and Server 2008 R2 - Added 09/2009 */
80 {"Windows 2012", NULL, 0, ACPI_OSI_WIN_8}, /* Windows 8 and Server 2012 - Added 08/2012 */
82 /* Feature Group Strings */
84 {"Extended Address Space Descriptor", NULL, ACPI_OSI_FEATURE, 0},
87 * All "optional" feature group strings (features that are implemented
88 * by the host) should be dynamically modified to VALID by the host via
89 * AcpiInstallInterface or AcpiUpdateInterfaces. Such optional feature
90 * group strings are set as INVALID by default here.
93 {"Module Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
94 {"Processor Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
95 {"3.0 Thermal Model", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
96 {"3.0 _SCP Extensions", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0},
97 {"Processor Aggregator Device", NULL, ACPI_OSI_OPTIONAL_FEATURE, 0}
101 /*******************************************************************************
103 * FUNCTION: AcpiUtInitializeInterfaces
109 * DESCRIPTION: Initialize the global _OSI supported interfaces list
111 ******************************************************************************/
114 AcpiUtInitializeInterfaces (
121 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
122 if (ACPI_FAILURE (Status))
127 AcpiGbl_SupportedInterfaces = AcpiDefaultSupportedInterfaces;
129 /* Link the static list of supported interfaces */
131 for (i = 0; i < (ACPI_ARRAY_LENGTH (AcpiDefaultSupportedInterfaces) - 1); i++)
133 AcpiDefaultSupportedInterfaces[i].Next =
134 &AcpiDefaultSupportedInterfaces[(ACPI_SIZE) i + 1];
137 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
142 /*******************************************************************************
144 * FUNCTION: AcpiUtInterfaceTerminate
150 * DESCRIPTION: Delete all interfaces in the global list. Sets
151 * AcpiGbl_SupportedInterfaces to NULL.
153 ******************************************************************************/
156 AcpiUtInterfaceTerminate (
160 ACPI_INTERFACE_INFO *NextInterface;
163 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
164 if (ACPI_FAILURE (Status))
169 NextInterface = AcpiGbl_SupportedInterfaces;
170 while (NextInterface)
172 AcpiGbl_SupportedInterfaces = NextInterface->Next;
174 if (NextInterface->Flags & ACPI_OSI_DYNAMIC)
176 /* Only interfaces added at runtime can be freed */
178 ACPI_FREE (NextInterface->Name);
179 ACPI_FREE (NextInterface);
183 /* Interface is in static list. Reset it to invalid or valid. */
185 if (NextInterface->Flags & ACPI_OSI_DEFAULT_INVALID)
187 NextInterface->Flags |= ACPI_OSI_INVALID;
191 NextInterface->Flags &= ~ACPI_OSI_INVALID;
195 NextInterface = AcpiGbl_SupportedInterfaces;
198 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
203 /*******************************************************************************
205 * FUNCTION: AcpiUtInstallInterface
207 * PARAMETERS: InterfaceName - The interface to install
211 * DESCRIPTION: Install the interface into the global interface list.
212 * Caller MUST hold AcpiGbl_OsiMutex
214 ******************************************************************************/
217 AcpiUtInstallInterface (
218 ACPI_STRING InterfaceName)
220 ACPI_INTERFACE_INFO *InterfaceInfo;
223 /* Allocate info block and space for the name string */
225 InterfaceInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_INTERFACE_INFO));
228 return (AE_NO_MEMORY);
231 InterfaceInfo->Name = ACPI_ALLOCATE_ZEROED (ACPI_STRLEN (InterfaceName) + 1);
232 if (!InterfaceInfo->Name)
234 ACPI_FREE (InterfaceInfo);
235 return (AE_NO_MEMORY);
238 /* Initialize new info and insert at the head of the global list */
240 ACPI_STRCPY (InterfaceInfo->Name, InterfaceName);
241 InterfaceInfo->Flags = ACPI_OSI_DYNAMIC;
242 InterfaceInfo->Next = AcpiGbl_SupportedInterfaces;
244 AcpiGbl_SupportedInterfaces = InterfaceInfo;
249 /*******************************************************************************
251 * FUNCTION: AcpiUtRemoveInterface
253 * PARAMETERS: InterfaceName - The interface to remove
257 * DESCRIPTION: Remove the interface from the global interface list.
258 * Caller MUST hold AcpiGbl_OsiMutex
260 ******************************************************************************/
263 AcpiUtRemoveInterface (
264 ACPI_STRING InterfaceName)
266 ACPI_INTERFACE_INFO *PreviousInterface;
267 ACPI_INTERFACE_INFO *NextInterface;
270 PreviousInterface = NextInterface = AcpiGbl_SupportedInterfaces;
271 while (NextInterface)
273 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name))
275 /* Found: name is in either the static list or was added at runtime */
277 if (NextInterface->Flags & ACPI_OSI_DYNAMIC)
279 /* Interface was added dynamically, remove and free it */
281 if (PreviousInterface == NextInterface)
283 AcpiGbl_SupportedInterfaces = NextInterface->Next;
287 PreviousInterface->Next = NextInterface->Next;
290 ACPI_FREE (NextInterface->Name);
291 ACPI_FREE (NextInterface);
296 * Interface is in static list. If marked invalid, then it
297 * does not actually exist. Else, mark it invalid.
299 if (NextInterface->Flags & ACPI_OSI_INVALID)
301 return (AE_NOT_EXIST);
304 NextInterface->Flags |= ACPI_OSI_INVALID;
310 PreviousInterface = NextInterface;
311 NextInterface = NextInterface->Next;
314 /* Interface was not found */
316 return (AE_NOT_EXIST);
320 /*******************************************************************************
322 * FUNCTION: AcpiUtUpdateInterfaces
324 * PARAMETERS: Action - Actions to be performed during the
329 * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
330 * strings or/and feature group strings.
331 * Caller MUST hold AcpiGbl_OsiMutex
333 ******************************************************************************/
336 AcpiUtUpdateInterfaces (
339 ACPI_INTERFACE_INFO *NextInterface;
342 NextInterface = AcpiGbl_SupportedInterfaces;
343 while (NextInterface)
345 if (((NextInterface->Flags & ACPI_OSI_FEATURE) &&
346 (Action & ACPI_FEATURE_STRINGS)) ||
347 (!(NextInterface->Flags & ACPI_OSI_FEATURE) &&
348 (Action & ACPI_VENDOR_STRINGS)))
350 if (Action & ACPI_DISABLE_INTERFACES)
352 /* Mark the interfaces as invalid */
354 NextInterface->Flags |= ACPI_OSI_INVALID;
358 /* Mark the interfaces as valid */
360 NextInterface->Flags &= ~ACPI_OSI_INVALID;
364 NextInterface = NextInterface->Next;
371 /*******************************************************************************
373 * FUNCTION: AcpiUtGetInterface
375 * PARAMETERS: InterfaceName - The interface to find
377 * RETURN: ACPI_INTERFACE_INFO if found. NULL if not found.
379 * DESCRIPTION: Search for the specified interface name in the global list.
380 * Caller MUST hold AcpiGbl_OsiMutex
382 ******************************************************************************/
384 ACPI_INTERFACE_INFO *
386 ACPI_STRING InterfaceName)
388 ACPI_INTERFACE_INFO *NextInterface;
391 NextInterface = AcpiGbl_SupportedInterfaces;
392 while (NextInterface)
394 if (!ACPI_STRCMP (InterfaceName, NextInterface->Name))
396 return (NextInterface);
399 NextInterface = NextInterface->Next;
406 /*******************************************************************************
408 * FUNCTION: AcpiUtOsiImplementation
410 * PARAMETERS: WalkState - Current walk state
414 * DESCRIPTION: Implementation of the _OSI predefined control method. When
415 * an invocation of _OSI is encountered in the system AML,
416 * control is transferred to this function.
418 ******************************************************************************/
421 AcpiUtOsiImplementation (
422 ACPI_WALK_STATE *WalkState)
424 ACPI_OPERAND_OBJECT *StringDesc;
425 ACPI_OPERAND_OBJECT *ReturnDesc;
426 ACPI_INTERFACE_INFO *InterfaceInfo;
427 ACPI_INTERFACE_HANDLER InterfaceHandler;
432 ACPI_FUNCTION_TRACE (UtOsiImplementation);
435 /* Validate the string input argument (from the AML caller) */
437 StringDesc = WalkState->Arguments[0].Object;
439 (StringDesc->Common.Type != ACPI_TYPE_STRING))
441 return_ACPI_STATUS (AE_TYPE);
444 /* Create a return object */
446 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
449 return_ACPI_STATUS (AE_NO_MEMORY);
452 /* Default return value is 0, NOT SUPPORTED */
455 Status = AcpiOsAcquireMutex (AcpiGbl_OsiMutex, ACPI_WAIT_FOREVER);
456 if (ACPI_FAILURE (Status))
458 AcpiUtRemoveReference (ReturnDesc);
459 return_ACPI_STATUS (Status);
462 /* Lookup the interface in the global _OSI list */
464 InterfaceInfo = AcpiUtGetInterface (StringDesc->String.Pointer);
466 !(InterfaceInfo->Flags & ACPI_OSI_INVALID))
469 * The interface is supported.
470 * Update the OsiData if necessary. We keep track of the latest
471 * version of Windows that has been requested by the BIOS.
473 if (InterfaceInfo->Value > AcpiGbl_OsiData)
475 AcpiGbl_OsiData = InterfaceInfo->Value;
478 ReturnValue = ACPI_UINT32_MAX;
481 AcpiOsReleaseMutex (AcpiGbl_OsiMutex);
484 * Invoke an optional _OSI interface handler. The host OS may wish
485 * to do some interface-specific handling. For example, warn about
486 * certain interfaces or override the true/false support value.
488 InterfaceHandler = AcpiGbl_InterfaceHandler;
489 if (InterfaceHandler)
491 ReturnValue = InterfaceHandler (
492 StringDesc->String.Pointer, ReturnValue);
495 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO,
496 "ACPI: BIOS _OSI(\"%s\") is %ssupported\n",
497 StringDesc->String.Pointer, ReturnValue == 0 ? "not " : ""));
499 /* Complete the return object */
501 ReturnDesc->Integer.Value = ReturnValue;
502 WalkState->ReturnDesc = ReturnDesc;
503 return_ACPI_STATUS (AE_OK);