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reactos/drivers/bus/acpi/acpica/namespace/nsinit.c

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/******************************************************************************
*
* Module Name: nsinit - namespace initialization
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acevents.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsinit")
/* Local prototypes */
static ACPI_STATUS
AcpiNsInitOneObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_STATUS
AcpiNsInitOneDevice (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue);
static ACPI_STATUS
AcpiNsFindIniMethods (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue);
/*******************************************************************************
*
* FUNCTION: AcpiNsInitializeObjects
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Walk the entire namespace and perform any necessary
* initialization on the objects found therein
*
******************************************************************************/
ACPI_STATUS
AcpiNsInitializeObjects (
void)
{
ACPI_STATUS Status;
ACPI_INIT_WALK_INFO Info;
ACPI_FUNCTION_TRACE (NsInitializeObjects);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Completing Initialization of ACPI Objects\n"));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"**** Starting initialization of namespace objects ****\n"));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Completing Region/Field/Buffer/Package initialization:\n"));
/* Set all init info to zero */
memset (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
/* Walk entire namespace from the supplied root */
Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL,
&Info, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
" Initialized %u/%u Regions %u/%u Fields %u/%u "
"Buffers %u/%u Packages (%u nodes)\n",
Info.OpRegionInit, Info.OpRegionCount,
Info.FieldInit, Info.FieldCount,
Info.BufferInit, Info.BufferCount,
Info.PackageInit, Info.PackageCount, Info.ObjectCount));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%u Control Methods found\n%u Op Regions found\n",
Info.MethodCount, Info.OpRegionCount));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitializeDevices
*
* PARAMETERS: None
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
* This means running _INI on all present devices.
*
* Note: We install PCI config space handler on region access,
* not here.
*
******************************************************************************/
ACPI_STATUS
AcpiNsInitializeDevices (
UINT32 Flags)
{
ACPI_STATUS Status = AE_OK;
ACPI_DEVICE_WALK_INFO Info;
ACPI_HANDLE Handle;
ACPI_FUNCTION_TRACE (NsInitializeDevices);
if (!(Flags & ACPI_NO_DEVICE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Initializing ACPI Devices\n"));
/* Init counters */
Info.DeviceCount = 0;
Info.Num_STA = 0;
Info.Num_INI = 0;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects "
"and executing _INI/_STA methods:\n"));
/* Tree analysis: find all subtrees that contain _INI methods */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Allocate the evaluation information block */
Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info.EvaluateInfo)
{
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/*
* Execute the "global" _INI method that may appear at the root.
* This support is provided for Windows compatibility (Vista+) and
* is not part of the ACPI specification.
*/
Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
Info.EvaluateInfo->Parameters = NULL;
Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info.EvaluateInfo);
if (ACPI_SUCCESS (Status))
{
Info.Num_INI++;
}
/*
* Execute \_SB._INI.
* There appears to be a strict order requirement for \_SB._INI,
* which should be evaluated before any _REG evaluations.
*/
Status = AcpiGetHandle (NULL, "\\_SB", &Handle);
if (ACPI_SUCCESS (Status))
{
memset (Info.EvaluateInfo, 0, sizeof (ACPI_EVALUATE_INFO));
Info.EvaluateInfo->PrefixNode = Handle;
Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
Info.EvaluateInfo->Parameters = NULL;
Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info.EvaluateInfo);
if (ACPI_SUCCESS (Status))
{
Info.Num_INI++;
}
}
}
/*
* Run all _REG methods
*
* Note: Any objects accessed by the _REG methods will be automatically
* initialized, even if they contain executable AML (see the call to
* AcpiNsInitializeObjects below).
*
* Note: According to the ACPI specification, we actually needn't execute
* _REG for SystemMemory/SystemIo operation regions, but for PCI_Config
* operation regions, it is required to evaluate _REG for those on a PCI
* root bus that doesn't contain _BBN object. So this code is kept here
* in order not to break things.
*/
if (!(Flags & ACPI_NO_ADDRESS_SPACE_INIT))
{
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"[Init] Executing _REG OpRegion methods\n"));
Status = AcpiEvInitializeOpRegions ();
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
}
if (!(Flags & ACPI_NO_DEVICE_INIT))
{
/* Walk namespace to execute all _INIs on present devices */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
/*
* Any _OSI requests should be completed by now. If the BIOS has
* requested any Windows OSI strings, we will always truncate
* I/O addresses to 16 bits -- for Windows compatibility.
*/
if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
{
AcpiGbl_TruncateIoAddresses = TRUE;
}
ACPI_FREE (Info.EvaluateInfo);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
" Executed %u _INI methods requiring %u _STA executions "
"(examined %u objects)\n",
Info.Num_INI, Info.Num_STA, Info.DeviceCount));
}
return_ACPI_STATUS (Status);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitOneObject
*
* PARAMETERS: ObjHandle - Node
* Level - Current nesting level
* Context - Points to a init info struct
* ReturnValue - Not used
*
* RETURN: Status
*
* DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
* within the namespace.
*
* Currently, the only objects that require initialization are:
* 1) Methods
* 2) Op Regions
*
******************************************************************************/
static ACPI_STATUS
AcpiNsInitOneObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_OBJECT_TYPE Type;
ACPI_STATUS Status = AE_OK;
ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_FUNCTION_NAME (NsInitOneObject);
Info->ObjectCount++;
/* And even then, we are only interested in a few object types */
Type = AcpiNsGetType (ObjHandle);
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return (AE_OK);
}
/* Increment counters for object types we are looking for */
switch (Type)
{
case ACPI_TYPE_REGION:
Info->OpRegionCount++;
break;
case ACPI_TYPE_BUFFER_FIELD:
Info->FieldCount++;
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
Info->FieldCount++;
break;
case ACPI_TYPE_BUFFER:
Info->BufferCount++;
break;
case ACPI_TYPE_PACKAGE:
Info->PackageCount++;
break;
default:
/* No init required, just exit now */
return (AE_OK);
}
/* If the object is already initialized, nothing else to do */
if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
{
return (AE_OK);
}
/* Must lock the interpreter before executing AML code */
AcpiExEnterInterpreter ();
/*
* Each of these types can contain executable AML code within the
* declaration.
*/
switch (Type)
{
case ACPI_TYPE_REGION:
Info->OpRegionInit++;
Status = AcpiDsGetRegionArguments (ObjDesc);
break;
case ACPI_TYPE_BUFFER_FIELD:
Info->FieldInit++;
Status = AcpiDsGetBufferFieldArguments (ObjDesc);
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
Info->FieldInit++;
Status = AcpiDsGetBankFieldArguments (ObjDesc);
break;
case ACPI_TYPE_BUFFER:
Info->BufferInit++;
Status = AcpiDsGetBufferArguments (ObjDesc);
break;
case ACPI_TYPE_PACKAGE:
Info->PackageInit++;
Status = AcpiDsGetPackageArguments (ObjDesc);
if (ACPI_FAILURE (Status))
{
break;
}
/*
* Resolve all named references in package objects (and all
* sub-packages). This action has been deferred until the entire
* namespace has been loaded, in order to support external and
* forward references from individual package elements (05/2017).
*/
Status = AcpiUtWalkPackageTree (ObjDesc, NULL,
AcpiDsInitPackageElement, NULL);
ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID;
break;
default:
/* No other types can get here */
break;
}
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not execute arguments for [%4.4s] (%s)",
AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
}
/*
* We ignore errors from above, and always return OK, since we don't want
* to abort the walk on any single error.
*/
AcpiExExitInterpreter ();
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsFindIniMethods
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: Called during namespace walk. Finds objects named _INI under
* device/processor/thermal objects, and marks the entire subtree
* with a SUBTREE_HAS_INI flag. This flag is used during the
* subsequent device initialization walk to avoid entire subtrees
* that do not contain an _INI.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsFindIniMethods (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
ACPI_NAMESPACE_NODE *Node;
ACPI_NAMESPACE_NODE *ParentNode;
/* Keep count of device/processor/thermal objects */
Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
if ((Node->Type == ACPI_TYPE_DEVICE) ||
(Node->Type == ACPI_TYPE_PROCESSOR) ||
(Node->Type == ACPI_TYPE_THERMAL))
{
Info->DeviceCount++;
return (AE_OK);
}
/* We are only looking for methods named _INI */
if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI))
{
return (AE_OK);
}
/*
* The only _INI methods that we care about are those that are
* present under Device, Processor, and Thermal objects.
*/
ParentNode = Node->Parent;
switch (ParentNode->Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* Mark parent and bubble up the INI present flag to the root */
while (ParentNode)
{
ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
ParentNode = ParentNode->Parent;
}
break;
default:
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitOneDevice
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: This is called once per device soon after ACPI is enabled
* to initialize each device. It determines if the device is
* present, and if so, calls _INI.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsInitOneDevice (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
UINT32 Flags;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *DeviceNode;
ACPI_FUNCTION_TRACE (NsInitOneDevice);
/* We are interested in Devices, Processors and ThermalZones only */
DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
(DeviceNode->Type != ACPI_TYPE_THERMAL))
{
return_ACPI_STATUS (AE_OK);
}
/*
* Because of an earlier namespace analysis, all subtrees that contain an
* _INI method are tagged.
*
* If this device subtree does not contain any _INI methods, we
* can exit now and stop traversing this entire subtree.
*/
if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
{
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
/*
* Run _STA to determine if this device is present and functioning. We
* must know this information for two important reasons (from ACPI spec):
*
* 1) We can only run _INI if the device is present.
* 2) We must abort the device tree walk on this subtree if the device is
* not present and is not functional (we will not examine the children)
*
* The _STA method is not required to be present under the device, we
* assume the device is present if _STA does not exist.
*/
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
Status = AcpiUtExecute_STA (DeviceNode, &Flags);
if (ACPI_FAILURE (Status))
{
/* Ignore error and move on to next device */
return_ACPI_STATUS (AE_OK);
}
/*
* Flags == -1 means that _STA was not found. In this case, we assume that
* the device is both present and functional.
*
* From the ACPI spec, description of _STA:
*
* "If a device object (including the processor object) does not have an
* _STA object, then OSPM assumes that all of the above bits are set (in
* other words, the device is present, ..., and functioning)"
*/
if (Flags != ACPI_UINT32_MAX)
{
WalkInfo->Num_STA++;
}
/*
* Examine the PRESENT and FUNCTIONING status bits
*
* Note: ACPI spec does not seem to specify behavior for the present but
* not functioning case, so we assume functioning if present.
*/
if (!(Flags & ACPI_STA_DEVICE_PRESENT))
{
/* Device is not present, we must examine the Functioning bit */
if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
{
/*
* Device is not present but is "functioning". In this case,
* we will not run _INI, but we continue to examine the children
* of this device.
*
* From the ACPI spec, description of _STA: (Note - no mention
* of whether to run _INI or not on the device in question)
*
* "_STA may return bit 0 clear (not present) with bit 3 set
* (device is functional). This case is used to indicate a valid
* device for which no device driver should be loaded (for example,
* a bridge device.) Children of this device may be present and
* valid. OSPM should continue enumeration below a device whose
* _STA returns this bit combination"
*/
return_ACPI_STATUS (AE_OK);
}
else
{
/*
* Device is not present and is not functioning. We must abort the
* walk of this subtree immediately -- don't look at the children
* of such a device.
*
* From the ACPI spec, description of _INI:
*
* "If the _STA method indicates that the device is not present,
* OSPM will not run the _INI and will not examine the children
* of the device for _INI methods"
*/
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
}
/*
* The device is present or is assumed present if no _STA exists.
* Run the _INI if it exists (not required to exist)
*
* Note: We know there is an _INI within this subtree, but it may not be
* under this particular device, it may be lower in the branch.
*/
if (!ACPI_COMPARE_NAME (DeviceNode->Name.Ascii, "_SB_") ||
DeviceNode->Parent != AcpiGbl_RootNode)
{
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
memset (Info, 0, sizeof (ACPI_EVALUATE_INFO));
Info->PrefixNode = DeviceNode;
Info->RelativePathname = METHOD_NAME__INI;
Info->Parameters = NULL;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info);
if (ACPI_SUCCESS (Status))
{
WalkInfo->Num_INI++;
}
#ifdef ACPI_DEBUG_OUTPUT
else if (Status != AE_NOT_FOUND)
{
/* Ignore error and move on to next device */
char *ScopeName = AcpiNsGetNormalizedPathname (DeviceNode, TRUE);
ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
ScopeName));
ACPI_FREE (ScopeName);
}
#endif
}
/* Ignore errors from above */
Status = AE_OK;
/*
* The _INI method has been run if present; call the Global Initialization
* Handler for this device.
*/
if (AcpiGbl_InitHandler)
{
Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
}
return_ACPI_STATUS (Status);
}
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