657 lines
19 KiB
C
657 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: nsinit - namespace initialization
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2014, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acdispat.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME ("nsinit")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiNsInitOneObject (
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ACPI_HANDLE ObjHandle,
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UINT32 Level,
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void *Context,
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void **ReturnValue);
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static ACPI_STATUS
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AcpiNsInitOneDevice (
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ACPI_HANDLE ObjHandle,
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UINT32 NestingLevel,
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void *Context,
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void **ReturnValue);
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static ACPI_STATUS
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AcpiNsFindIniMethods (
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ACPI_HANDLE ObjHandle,
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UINT32 NestingLevel,
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void *Context,
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void **ReturnValue);
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInitializeObjects
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the entire namespace and perform any necessary
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* initialization on the objects found therein
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsInitializeObjects (
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void)
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{
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ACPI_STATUS Status;
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ACPI_INIT_WALK_INFO Info;
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ACPI_FUNCTION_TRACE (NsInitializeObjects);
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"**** Starting initialization of namespace objects ****\n"));
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
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"Completing Region/Field/Buffer/Package initialization:\n"));
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/* Set all init info to zero */
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ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
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/* Walk entire namespace from the supplied root */
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Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, AcpiNsInitOneObject, NULL,
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&Info, NULL);
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
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}
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
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" Initialized %u/%u Regions %u/%u Fields %u/%u "
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"Buffers %u/%u Packages (%u nodes)\n",
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Info.OpRegionInit, Info.OpRegionCount,
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Info.FieldInit, Info.FieldCount,
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Info.BufferInit, Info.BufferCount,
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Info.PackageInit, Info.PackageCount, Info.ObjectCount));
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"%u Control Methods found\n%u Op Regions found\n",
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Info.MethodCount, Info.OpRegionCount));
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInitializeDevices
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*
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* PARAMETERS: None
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
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* This means running _INI on all present devices.
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*
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* Note: We install PCI config space handler on region access,
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* not here.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiNsInitializeDevices (
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void)
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{
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ACPI_STATUS Status;
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ACPI_DEVICE_WALK_INFO Info;
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ACPI_FUNCTION_TRACE (NsInitializeDevices);
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/* Init counters */
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Info.DeviceCount = 0;
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Info.Num_STA = 0;
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Info.Num_INI = 0;
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
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"Initializing Device/Processor/Thermal objects "
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"and executing _INI/_STA methods:\n"));
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/* Tree analysis: find all subtrees that contain _INI methods */
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Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, NULL, &Info, NULL);
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if (ACPI_FAILURE (Status))
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{
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goto ErrorExit;
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}
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/* Allocate the evaluation information block */
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Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info.EvaluateInfo)
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{
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Status = AE_NO_MEMORY;
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goto ErrorExit;
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}
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/*
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* Execute the "global" _INI method that may appear at the root. This
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* support is provided for Windows compatibility (Vista+) and is not
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* part of the ACPI specification.
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*/
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Info.EvaluateInfo->PrefixNode = AcpiGbl_RootNode;
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Info.EvaluateInfo->RelativePathname = METHOD_NAME__INI;
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Info.EvaluateInfo->Parameters = NULL;
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Info.EvaluateInfo->Flags = ACPI_IGNORE_RETURN_VALUE;
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Status = AcpiNsEvaluate (Info.EvaluateInfo);
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if (ACPI_SUCCESS (Status))
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{
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Info.Num_INI++;
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}
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/* Walk namespace to execute all _INIs on present devices */
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Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
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ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, NULL, &Info, NULL);
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/*
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* Any _OSI requests should be completed by now. If the BIOS has
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* requested any Windows OSI strings, we will always truncate
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* I/O addresses to 16 bits -- for Windows compatibility.
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*/
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if (AcpiGbl_OsiData >= ACPI_OSI_WIN_2000)
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{
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AcpiGbl_TruncateIoAddresses = TRUE;
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}
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ACPI_FREE (Info.EvaluateInfo);
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if (ACPI_FAILURE (Status))
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{
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goto ErrorExit;
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}
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ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
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" Executed %u _INI methods requiring %u _STA executions "
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"(examined %u objects)\n",
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Info.Num_INI, Info.Num_STA, Info.DeviceCount));
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return_ACPI_STATUS (Status);
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ErrorExit:
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ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInitOneObject
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*
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* PARAMETERS: ObjHandle - Node
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* Level - Current nesting level
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* Context - Points to a init info struct
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* ReturnValue - Not used
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*
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* RETURN: Status
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*
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* DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
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* within the namespace.
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*
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* Currently, the only objects that require initialization are:
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* 1) Methods
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* 2) Op Regions
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsInitOneObject (
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ACPI_HANDLE ObjHandle,
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UINT32 Level,
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void *Context,
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void **ReturnValue)
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{
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ACPI_OBJECT_TYPE Type;
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ACPI_STATUS Status = AE_OK;
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ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
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ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_FUNCTION_NAME (NsInitOneObject);
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Info->ObjectCount++;
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/* And even then, we are only interested in a few object types */
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Type = AcpiNsGetType (ObjHandle);
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (!ObjDesc)
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{
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return (AE_OK);
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}
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/* Increment counters for object types we are looking for */
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switch (Type)
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{
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case ACPI_TYPE_REGION:
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Info->OpRegionCount++;
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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Info->FieldCount++;
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break;
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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Info->FieldCount++;
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break;
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case ACPI_TYPE_BUFFER:
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Info->BufferCount++;
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break;
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case ACPI_TYPE_PACKAGE:
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Info->PackageCount++;
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break;
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default:
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/* No init required, just exit now */
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return (AE_OK);
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}
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/* If the object is already initialized, nothing else to do */
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if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
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{
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return (AE_OK);
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}
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/* Must lock the interpreter before executing AML code */
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AcpiExEnterInterpreter ();
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/*
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* Each of these types can contain executable AML code within the
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* declaration.
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*/
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switch (Type)
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{
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case ACPI_TYPE_REGION:
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Info->OpRegionInit++;
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Status = AcpiDsGetRegionArguments (ObjDesc);
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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Info->FieldInit++;
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Status = AcpiDsGetBufferFieldArguments (ObjDesc);
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break;
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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Info->FieldInit++;
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Status = AcpiDsGetBankFieldArguments (ObjDesc);
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break;
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case ACPI_TYPE_BUFFER:
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Info->BufferInit++;
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Status = AcpiDsGetBufferArguments (ObjDesc);
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break;
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case ACPI_TYPE_PACKAGE:
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Info->PackageInit++;
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Status = AcpiDsGetPackageArguments (ObjDesc);
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break;
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default:
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/* No other types can get here */
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break;
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}
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"Could not execute arguments for [%4.4s] (%s)",
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AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
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}
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/*
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* We ignore errors from above, and always return OK, since we don't want
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* to abort the walk on any single error.
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*/
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AcpiExExitInterpreter ();
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsFindIniMethods
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*
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* PARAMETERS: ACPI_WALK_CALLBACK
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: Called during namespace walk. Finds objects named _INI under
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* device/processor/thermal objects, and marks the entire subtree
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* with a SUBTREE_HAS_INI flag. This flag is used during the
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* subsequent device initialization walk to avoid entire subtrees
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* that do not contain an _INI.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsFindIniMethods (
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ACPI_HANDLE ObjHandle,
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UINT32 NestingLevel,
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void *Context,
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void **ReturnValue)
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{
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ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
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ACPI_NAMESPACE_NODE *Node;
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ACPI_NAMESPACE_NODE *ParentNode;
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/* Keep count of device/processor/thermal objects */
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Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
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if ((Node->Type == ACPI_TYPE_DEVICE) ||
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(Node->Type == ACPI_TYPE_PROCESSOR) ||
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(Node->Type == ACPI_TYPE_THERMAL))
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{
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Info->DeviceCount++;
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return (AE_OK);
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}
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/* We are only looking for methods named _INI */
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if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI))
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{
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return (AE_OK);
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}
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/*
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* The only _INI methods that we care about are those that are
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* present under Device, Processor, and Thermal objects.
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*/
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ParentNode = Node->Parent;
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switch (ParentNode->Type)
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{
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/* Mark parent and bubble up the INI present flag to the root */
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while (ParentNode)
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{
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ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
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ParentNode = ParentNode->Parent;
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}
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break;
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default:
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break;
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}
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return (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiNsInitOneDevice
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*
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* PARAMETERS: ACPI_WALK_CALLBACK
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*
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* RETURN: ACPI_STATUS
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*
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* DESCRIPTION: This is called once per device soon after ACPI is enabled
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* to initialize each device. It determines if the device is
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* present, and if so, calls _INI.
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiNsInitOneDevice (
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ACPI_HANDLE ObjHandle,
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UINT32 NestingLevel,
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void *Context,
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void **ReturnValue)
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{
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ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
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ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
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UINT32 Flags;
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *DeviceNode;
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ACPI_FUNCTION_TRACE (NsInitOneDevice);
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/* We are interested in Devices, Processors and ThermalZones only */
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DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
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if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
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(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
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(DeviceNode->Type != ACPI_TYPE_THERMAL))
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Because of an earlier namespace analysis, all subtrees that contain an
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* _INI method are tagged.
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*
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* If this device subtree does not contain any _INI methods, we
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* can exit now and stop traversing this entire subtree.
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*/
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if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
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{
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return_ACPI_STATUS (AE_CTRL_DEPTH);
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}
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/*
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* Run _STA to determine if this device is present and functioning. We
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* must know this information for two important reasons (from ACPI spec):
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*
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* 1) We can only run _INI if the device is present.
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* 2) We must abort the device tree walk on this subtree if the device is
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* not present and is not functional (we will not examine the children)
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*
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* The _STA method is not required to be present under the device, we
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* assume the device is present if _STA does not exist.
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*/
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ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
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ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
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Status = AcpiUtExecute_STA (DeviceNode, &Flags);
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if (ACPI_FAILURE (Status))
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{
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/* Ignore error and move on to next device */
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Flags == -1 means that _STA was not found. In this case, we assume that
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* the device is both present and functional.
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*
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* From the ACPI spec, description of _STA:
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*
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* "If a device object (including the processor object) does not have an
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* _STA object, then OSPM assumes that all of the above bits are set (in
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* other words, the device is present, ..., and functioning)"
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*/
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if (Flags != ACPI_UINT32_MAX)
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{
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WalkInfo->Num_STA++;
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}
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/*
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* Examine the PRESENT and FUNCTIONING status bits
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*
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* Note: ACPI spec does not seem to specify behavior for the present but
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* not functioning case, so we assume functioning if present.
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*/
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if (!(Flags & ACPI_STA_DEVICE_PRESENT))
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{
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/* Device is not present, we must examine the Functioning bit */
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if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
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{
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/*
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* Device is not present but is "functioning". In this case,
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* we will not run _INI, but we continue to examine the children
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* of this device.
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*
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* From the ACPI spec, description of _STA: (Note - no mention
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* 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.
|
|
*/
|
|
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
|
|
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
|
|
|
|
ACPI_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 = AcpiNsGetExternalPathname (Info->Node);
|
|
|
|
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);
|
|
}
|