utxfmutex.c revision 1.1.1.1.10.3
1 1.1.1.1.10.2 tls /******************************************************************************* 2 1.1.1.1.10.2 tls * 3 1.1.1.1.10.2 tls * Module Name: utxfmutex - external AML mutex access functions 4 1.1.1.1.10.2 tls * 5 1.1.1.1.10.2 tls ******************************************************************************/ 6 1.1.1.1.10.2 tls 7 1.1.1.1.10.2 tls /* 8 1.1.1.1.10.3 jdolecek * Copyright (C) 2000 - 2017, Intel Corp. 9 1.1.1.1.10.2 tls * All rights reserved. 10 1.1.1.1.10.2 tls * 11 1.1.1.1.10.2 tls * Redistribution and use in source and binary forms, with or without 12 1.1.1.1.10.2 tls * modification, are permitted provided that the following conditions 13 1.1.1.1.10.2 tls * are met: 14 1.1.1.1.10.2 tls * 1. Redistributions of source code must retain the above copyright 15 1.1.1.1.10.2 tls * notice, this list of conditions, and the following disclaimer, 16 1.1.1.1.10.2 tls * without modification. 17 1.1.1.1.10.2 tls * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 1.1.1.1.10.2 tls * substantially similar to the "NO WARRANTY" disclaimer below 19 1.1.1.1.10.2 tls * ("Disclaimer") and any redistribution must be conditioned upon 20 1.1.1.1.10.2 tls * including a substantially similar Disclaimer requirement for further 21 1.1.1.1.10.2 tls * binary redistribution. 22 1.1.1.1.10.2 tls * 3. Neither the names of the above-listed copyright holders nor the names 23 1.1.1.1.10.2 tls * of any contributors may be used to endorse or promote products derived 24 1.1.1.1.10.2 tls * from this software without specific prior written permission. 25 1.1.1.1.10.2 tls * 26 1.1.1.1.10.2 tls * Alternatively, this software may be distributed under the terms of the 27 1.1.1.1.10.2 tls * GNU General Public License ("GPL") version 2 as published by the Free 28 1.1.1.1.10.2 tls * Software Foundation. 29 1.1.1.1.10.2 tls * 30 1.1.1.1.10.2 tls * NO WARRANTY 31 1.1.1.1.10.2 tls * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 1.1.1.1.10.2 tls * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 1.1.1.1.10.2 tls * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 1.1.1.1.10.2 tls * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 1.1.1.1.10.2 tls * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.1.1.1.10.2 tls * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.1.1.1.10.2 tls * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.1.1.1.10.2 tls * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 1.1.1.1.10.2 tls * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 1.1.1.1.10.2 tls * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 1.1.1.1.10.2 tls * POSSIBILITY OF SUCH DAMAGES. 42 1.1.1.1.10.2 tls */ 43 1.1.1.1.10.2 tls 44 1.1.1.1.10.2 tls #include "acpi.h" 45 1.1.1.1.10.2 tls #include "accommon.h" 46 1.1.1.1.10.2 tls #include "acnamesp.h" 47 1.1.1.1.10.2 tls 48 1.1.1.1.10.2 tls 49 1.1.1.1.10.2 tls #define _COMPONENT ACPI_UTILITIES 50 1.1.1.1.10.2 tls ACPI_MODULE_NAME ("utxfmutex") 51 1.1.1.1.10.2 tls 52 1.1.1.1.10.2 tls 53 1.1.1.1.10.2 tls /* Local prototypes */ 54 1.1.1.1.10.2 tls 55 1.1.1.1.10.2 tls static ACPI_STATUS 56 1.1.1.1.10.2 tls AcpiUtGetMutexObject ( 57 1.1.1.1.10.2 tls ACPI_HANDLE Handle, 58 1.1.1.1.10.2 tls ACPI_STRING Pathname, 59 1.1.1.1.10.2 tls ACPI_OPERAND_OBJECT **RetObj); 60 1.1.1.1.10.2 tls 61 1.1.1.1.10.2 tls 62 1.1.1.1.10.2 tls /******************************************************************************* 63 1.1.1.1.10.2 tls * 64 1.1.1.1.10.2 tls * FUNCTION: AcpiUtGetMutexObject 65 1.1.1.1.10.2 tls * 66 1.1.1.1.10.2 tls * PARAMETERS: Handle - Mutex or prefix handle (optional) 67 1.1.1.1.10.2 tls * Pathname - Mutex pathname (optional) 68 1.1.1.1.10.2 tls * RetObj - Where the mutex object is returned 69 1.1.1.1.10.2 tls * 70 1.1.1.1.10.2 tls * RETURN: Status 71 1.1.1.1.10.2 tls * 72 1.1.1.1.10.2 tls * DESCRIPTION: Get an AML mutex object. The mutex node is pointed to by 73 1.1.1.1.10.2 tls * Handle:Pathname. Either Handle or Pathname can be NULL, but 74 1.1.1.1.10.2 tls * not both. 75 1.1.1.1.10.2 tls * 76 1.1.1.1.10.2 tls ******************************************************************************/ 77 1.1.1.1.10.2 tls 78 1.1.1.1.10.2 tls static ACPI_STATUS 79 1.1.1.1.10.2 tls AcpiUtGetMutexObject ( 80 1.1.1.1.10.2 tls ACPI_HANDLE Handle, 81 1.1.1.1.10.2 tls ACPI_STRING Pathname, 82 1.1.1.1.10.2 tls ACPI_OPERAND_OBJECT **RetObj) 83 1.1.1.1.10.2 tls { 84 1.1.1.1.10.2 tls ACPI_NAMESPACE_NODE *MutexNode; 85 1.1.1.1.10.2 tls ACPI_OPERAND_OBJECT *MutexObj; 86 1.1.1.1.10.2 tls ACPI_STATUS Status; 87 1.1.1.1.10.2 tls 88 1.1.1.1.10.2 tls 89 1.1.1.1.10.2 tls /* Parameter validation */ 90 1.1.1.1.10.2 tls 91 1.1.1.1.10.2 tls if (!RetObj || (!Handle && !Pathname)) 92 1.1.1.1.10.2 tls { 93 1.1.1.1.10.2 tls return (AE_BAD_PARAMETER); 94 1.1.1.1.10.2 tls } 95 1.1.1.1.10.2 tls 96 1.1.1.1.10.2 tls /* Get a the namespace node for the mutex */ 97 1.1.1.1.10.2 tls 98 1.1.1.1.10.2 tls MutexNode = Handle; 99 1.1.1.1.10.2 tls if (Pathname != NULL) 100 1.1.1.1.10.2 tls { 101 1.1.1.1.10.3 jdolecek Status = AcpiGetHandle ( 102 1.1.1.1.10.3 jdolecek Handle, Pathname, ACPI_CAST_PTR (ACPI_HANDLE, &MutexNode)); 103 1.1.1.1.10.2 tls if (ACPI_FAILURE (Status)) 104 1.1.1.1.10.2 tls { 105 1.1.1.1.10.2 tls return (Status); 106 1.1.1.1.10.2 tls } 107 1.1.1.1.10.2 tls } 108 1.1.1.1.10.2 tls 109 1.1.1.1.10.2 tls /* Ensure that we actually have a Mutex object */ 110 1.1.1.1.10.2 tls 111 1.1.1.1.10.2 tls if (!MutexNode || 112 1.1.1.1.10.2 tls (MutexNode->Type != ACPI_TYPE_MUTEX)) 113 1.1.1.1.10.2 tls { 114 1.1.1.1.10.2 tls return (AE_TYPE); 115 1.1.1.1.10.2 tls } 116 1.1.1.1.10.2 tls 117 1.1.1.1.10.2 tls /* Get the low-level mutex object */ 118 1.1.1.1.10.2 tls 119 1.1.1.1.10.2 tls MutexObj = AcpiNsGetAttachedObject (MutexNode); 120 1.1.1.1.10.2 tls if (!MutexObj) 121 1.1.1.1.10.2 tls { 122 1.1.1.1.10.2 tls return (AE_NULL_OBJECT); 123 1.1.1.1.10.2 tls } 124 1.1.1.1.10.2 tls 125 1.1.1.1.10.2 tls *RetObj = MutexObj; 126 1.1.1.1.10.2 tls return (AE_OK); 127 1.1.1.1.10.2 tls } 128 1.1.1.1.10.2 tls 129 1.1.1.1.10.2 tls 130 1.1.1.1.10.2 tls /******************************************************************************* 131 1.1.1.1.10.2 tls * 132 1.1.1.1.10.2 tls * FUNCTION: AcpiAcquireMutex 133 1.1.1.1.10.2 tls * 134 1.1.1.1.10.2 tls * PARAMETERS: Handle - Mutex or prefix handle (optional) 135 1.1.1.1.10.2 tls * Pathname - Mutex pathname (optional) 136 1.1.1.1.10.2 tls * Timeout - Max time to wait for the lock (millisec) 137 1.1.1.1.10.2 tls * 138 1.1.1.1.10.2 tls * RETURN: Status 139 1.1.1.1.10.2 tls * 140 1.1.1.1.10.2 tls * DESCRIPTION: Acquire an AML mutex. This is a device driver interface to 141 1.1.1.1.10.2 tls * AML mutex objects, and allows for transaction locking between 142 1.1.1.1.10.2 tls * drivers and AML code. The mutex node is pointed to by 143 1.1.1.1.10.2 tls * Handle:Pathname. Either Handle or Pathname can be NULL, but 144 1.1.1.1.10.2 tls * not both. 145 1.1.1.1.10.2 tls * 146 1.1.1.1.10.2 tls ******************************************************************************/ 147 1.1.1.1.10.2 tls 148 1.1.1.1.10.2 tls ACPI_STATUS 149 1.1.1.1.10.2 tls AcpiAcquireMutex ( 150 1.1.1.1.10.2 tls ACPI_HANDLE Handle, 151 1.1.1.1.10.2 tls ACPI_STRING Pathname, 152 1.1.1.1.10.2 tls UINT16 Timeout) 153 1.1.1.1.10.2 tls { 154 1.1.1.1.10.2 tls ACPI_STATUS Status; 155 1.1.1.1.10.2 tls ACPI_OPERAND_OBJECT *MutexObj; 156 1.1.1.1.10.2 tls 157 1.1.1.1.10.2 tls 158 1.1.1.1.10.2 tls /* Get the low-level mutex associated with Handle:Pathname */ 159 1.1.1.1.10.2 tls 160 1.1.1.1.10.2 tls Status = AcpiUtGetMutexObject (Handle, Pathname, &MutexObj); 161 1.1.1.1.10.2 tls if (ACPI_FAILURE (Status)) 162 1.1.1.1.10.2 tls { 163 1.1.1.1.10.2 tls return (Status); 164 1.1.1.1.10.2 tls } 165 1.1.1.1.10.2 tls 166 1.1.1.1.10.2 tls /* Acquire the OS mutex */ 167 1.1.1.1.10.2 tls 168 1.1.1.1.10.2 tls Status = AcpiOsAcquireMutex (MutexObj->Mutex.OsMutex, Timeout); 169 1.1.1.1.10.2 tls return (Status); 170 1.1.1.1.10.2 tls } 171 1.1.1.1.10.2 tls 172 1.1.1.1.10.3 jdolecek ACPI_EXPORT_SYMBOL (AcpiAcquireMutex) 173 1.1.1.1.10.3 jdolecek 174 1.1.1.1.10.2 tls 175 1.1.1.1.10.2 tls /******************************************************************************* 176 1.1.1.1.10.2 tls * 177 1.1.1.1.10.2 tls * FUNCTION: AcpiReleaseMutex 178 1.1.1.1.10.2 tls * 179 1.1.1.1.10.2 tls * PARAMETERS: Handle - Mutex or prefix handle (optional) 180 1.1.1.1.10.2 tls * Pathname - Mutex pathname (optional) 181 1.1.1.1.10.2 tls * 182 1.1.1.1.10.2 tls * RETURN: Status 183 1.1.1.1.10.2 tls * 184 1.1.1.1.10.2 tls * DESCRIPTION: Release an AML mutex. This is a device driver interface to 185 1.1.1.1.10.2 tls * AML mutex objects, and allows for transaction locking between 186 1.1.1.1.10.2 tls * drivers and AML code. The mutex node is pointed to by 187 1.1.1.1.10.2 tls * Handle:Pathname. Either Handle or Pathname can be NULL, but 188 1.1.1.1.10.2 tls * not both. 189 1.1.1.1.10.2 tls * 190 1.1.1.1.10.2 tls ******************************************************************************/ 191 1.1.1.1.10.2 tls 192 1.1.1.1.10.2 tls ACPI_STATUS 193 1.1.1.1.10.2 tls AcpiReleaseMutex ( 194 1.1.1.1.10.2 tls ACPI_HANDLE Handle, 195 1.1.1.1.10.2 tls ACPI_STRING Pathname) 196 1.1.1.1.10.2 tls { 197 1.1.1.1.10.2 tls ACPI_STATUS Status; 198 1.1.1.1.10.2 tls ACPI_OPERAND_OBJECT *MutexObj; 199 1.1.1.1.10.2 tls 200 1.1.1.1.10.2 tls 201 1.1.1.1.10.2 tls /* Get the low-level mutex associated with Handle:Pathname */ 202 1.1.1.1.10.2 tls 203 1.1.1.1.10.2 tls Status = AcpiUtGetMutexObject (Handle, Pathname, &MutexObj); 204 1.1.1.1.10.2 tls if (ACPI_FAILURE (Status)) 205 1.1.1.1.10.2 tls { 206 1.1.1.1.10.2 tls return (Status); 207 1.1.1.1.10.2 tls } 208 1.1.1.1.10.2 tls 209 1.1.1.1.10.2 tls /* Release the OS mutex */ 210 1.1.1.1.10.2 tls 211 1.1.1.1.10.2 tls AcpiOsReleaseMutex (MutexObj->Mutex.OsMutex); 212 1.1.1.1.10.2 tls return (AE_OK); 213 1.1.1.1.10.2 tls } 214 1.1.1.1.10.3 jdolecek 215 1.1.1.1.10.3 jdolecek ACPI_EXPORT_SYMBOL (AcpiReleaseMutex) 216
Indexes created Fri Oct 03 17:10:05 GMT 2025