1 /****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 ***************************************************************************** 115 * 116 * Alternatively, you may choose to be licensed under the terms of the 117 * following license: 118 * 119 * Redistribution and use in source and binary forms, with or without 120 * modification, are permitted provided that the following conditions 121 * are met: 122 * 1. Redistributions of source code must retain the above copyright 123 * notice, this list of conditions, and the following disclaimer, 124 * without modification. 125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 126 * substantially similar to the "NO WARRANTY" disclaimer below 127 * ("Disclaimer") and any redistribution must be conditioned upon 128 * including a substantially similar Disclaimer requirement for further 129 * binary redistribution. 130 * 3. Neither the names of the above-listed copyright holders nor the names 131 * of any contributors may be used to endorse or promote products derived 132 * from this software without specific prior written permission. 133 * 134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 145 * 146 * Alternatively, you may choose to be licensed under the terms of the 147 * GNU General Public License ("GPL") version 2 as published by the Free 148 * Software Foundation. 149 * 150 *****************************************************************************/ 151 152 #include "acpi.h" 153 #include "accommon.h" 154 #include "acevents.h" 155 #include "acnamesp.h" 156 157 #define _COMPONENT ACPI_EVENTS 158 ACPI_MODULE_NAME ("evmisc") 159 160 161 /* Local prototypes */ 162 163 static void ACPI_SYSTEM_XFACE 164 AcpiEvNotifyDispatch ( 165 void *Context); 166 167 168 /******************************************************************************* 169 * 170 * FUNCTION: AcpiEvIsNotifyObject 171 * 172 * PARAMETERS: Node - Node to check 173 * 174 * RETURN: TRUE if notifies allowed on this object 175 * 176 * DESCRIPTION: Check type of node for a object that supports notifies. 177 * 178 * TBD: This could be replaced by a flag bit in the node. 179 * 180 ******************************************************************************/ 181 182 BOOLEAN 183 AcpiEvIsNotifyObject ( 184 ACPI_NAMESPACE_NODE *Node) 185 { 186 187 switch (Node->Type) 188 { 189 case ACPI_TYPE_DEVICE: 190 case ACPI_TYPE_PROCESSOR: 191 case ACPI_TYPE_THERMAL: 192 /* 193 * These are the ONLY objects that can receive ACPI notifications 194 */ 195 return (TRUE); 196 197 default: 198 199 return (FALSE); 200 } 201 } 202 203 204 /******************************************************************************* 205 * 206 * FUNCTION: AcpiEvQueueNotifyRequest 207 * 208 * PARAMETERS: Node - NS node for the notified object 209 * NotifyValue - Value from the Notify() request 210 * 211 * RETURN: Status 212 * 213 * DESCRIPTION: Dispatch a device notification event to a previously 214 * installed handler. 215 * 216 ******************************************************************************/ 217 218 ACPI_STATUS 219 AcpiEvQueueNotifyRequest ( 220 ACPI_NAMESPACE_NODE *Node, 221 UINT32 NotifyValue) 222 { 223 ACPI_OPERAND_OBJECT *ObjDesc; 224 ACPI_OPERAND_OBJECT *HandlerListHead = NULL; 225 ACPI_GENERIC_STATE *Info; 226 UINT8 HandlerListId = 0; 227 ACPI_STATUS Status = AE_OK; 228 229 230 ACPI_FUNCTION_NAME (EvQueueNotifyRequest); 231 232 233 /* Are Notifies allowed on this object? */ 234 235 if (!AcpiEvIsNotifyObject (Node)) 236 { 237 return (AE_TYPE); 238 } 239 240 /* Get the correct notify list type (System or Device) */ 241 242 if (NotifyValue <= ACPI_MAX_SYS_NOTIFY) 243 { 244 HandlerListId = ACPI_SYSTEM_HANDLER_LIST; 245 } 246 else 247 { 248 HandlerListId = ACPI_DEVICE_HANDLER_LIST; 249 } 250 251 /* Get the notify object attached to the namespace Node */ 252 253 ObjDesc = AcpiNsGetAttachedObject (Node); 254 if (ObjDesc) 255 { 256 /* We have an attached object, Get the correct handler list */ 257 258 HandlerListHead = ObjDesc->CommonNotify.NotifyList[HandlerListId]; 259 } 260 261 /* 262 * If there is no notify handler (Global or Local) 263 * for this object, just ignore the notify 264 */ 265 if (!AcpiGbl_GlobalNotify[HandlerListId].Handler && !HandlerListHead) 266 { 267 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 268 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", 269 AcpiUtGetNodeName (Node), NotifyValue, Node)); 270 271 return (AE_OK); 272 } 273 274 /* Setup notify info and schedule the notify dispatcher */ 275 276 Info = AcpiUtCreateGenericState (); 277 if (!Info) 278 { 279 return (AE_NO_MEMORY); 280 } 281 282 Info->Common.DescriptorType = ACPI_DESC_TYPE_STATE_NOTIFY; 283 284 Info->Notify.Node = Node; 285 Info->Notify.Value = (UINT16) NotifyValue; 286 Info->Notify.HandlerListId = HandlerListId; 287 Info->Notify.HandlerListHead = HandlerListHead; 288 Info->Notify.Global = &AcpiGbl_GlobalNotify[HandlerListId]; 289 290 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 291 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", 292 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type), 293 NotifyValue, AcpiUtGetNotifyName (NotifyValue, ACPI_TYPE_ANY), Node)); 294 295 Status = AcpiOsExecute (OSL_NOTIFY_HANDLER, 296 AcpiEvNotifyDispatch, Info); 297 if (ACPI_FAILURE (Status)) 298 { 299 AcpiUtDeleteGenericState (Info); 300 } 301 302 return (Status); 303 } 304 305 306 /******************************************************************************* 307 * 308 * FUNCTION: AcpiEvNotifyDispatch 309 * 310 * PARAMETERS: Context - To be passed to the notify handler 311 * 312 * RETURN: None. 313 * 314 * DESCRIPTION: Dispatch a device notification event to a previously 315 * installed handler. 316 * 317 ******************************************************************************/ 318 319 static void ACPI_SYSTEM_XFACE 320 AcpiEvNotifyDispatch ( 321 void *Context) 322 { 323 ACPI_GENERIC_STATE *Info = (ACPI_GENERIC_STATE *) Context; 324 ACPI_OPERAND_OBJECT *HandlerObj; 325 326 327 ACPI_FUNCTION_ENTRY (); 328 329 330 /* Invoke a global notify handler if installed */ 331 332 if (Info->Notify.Global->Handler) 333 { 334 Info->Notify.Global->Handler (Info->Notify.Node, 335 Info->Notify.Value, 336 Info->Notify.Global->Context); 337 } 338 339 /* Now invoke the local notify handler(s) if any are installed */ 340 341 HandlerObj = Info->Notify.HandlerListHead; 342 while (HandlerObj) 343 { 344 HandlerObj->Notify.Handler (Info->Notify.Node, 345 Info->Notify.Value, 346 HandlerObj->Notify.Context); 347 348 HandlerObj = HandlerObj->Notify.Next[Info->Notify.HandlerListId]; 349 } 350 351 /* All done with the info object */ 352 353 AcpiUtDeleteGenericState (Info); 354 } 355 356 357 #if (!ACPI_REDUCED_HARDWARE) 358 /****************************************************************************** 359 * 360 * FUNCTION: AcpiEvTerminate 361 * 362 * PARAMETERS: none 363 * 364 * RETURN: none 365 * 366 * DESCRIPTION: Disable events and free memory allocated for table storage. 367 * 368 ******************************************************************************/ 369 370 void 371 AcpiEvTerminate ( 372 void) 373 { 374 UINT32 i; 375 ACPI_STATUS Status; 376 377 378 ACPI_FUNCTION_TRACE (EvTerminate); 379 380 381 if (AcpiGbl_EventsInitialized) 382 { 383 /* 384 * Disable all event-related functionality. In all cases, on error, 385 * print a message but obviously we don't abort. 386 */ 387 388 /* Disable all fixed events */ 389 390 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 391 { 392 Status = AcpiDisableEvent (i, 0); 393 if (ACPI_FAILURE (Status)) 394 { 395 ACPI_ERROR ((AE_INFO, 396 "Could not disable fixed event %u", (UINT32) i)); 397 } 398 } 399 400 /* Disable all GPEs in all GPE blocks */ 401 402 Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL); 403 404 Status = AcpiEvRemoveGlobalLockHandler (); 405 if (ACPI_FAILURE(Status)) 406 { 407 ACPI_ERROR ((AE_INFO, 408 "Could not remove Global Lock handler")); 409 } 410 411 AcpiGbl_EventsInitialized = FALSE; 412 } 413 414 /* Remove SCI handlers */ 415 416 Status = AcpiEvRemoveAllSciHandlers (); 417 if (ACPI_FAILURE(Status)) 418 { 419 ACPI_ERROR ((AE_INFO, 420 "Could not remove SCI handler")); 421 } 422 423 /* Deallocate all handler objects installed within GPE info structs */ 424 425 Status = AcpiEvWalkGpeList (AcpiEvDeleteGpeHandlers, NULL); 426 427 /* Return to original mode if necessary */ 428 429 if (AcpiGbl_OriginalMode == ACPI_SYS_MODE_LEGACY) 430 { 431 Status = AcpiDisable (); 432 if (ACPI_FAILURE (Status)) 433 { 434 ACPI_WARNING ((AE_INFO, "AcpiDisable failed")); 435 } 436 } 437 return_VOID; 438 } 439 440 #endif /* !ACPI_REDUCED_HARDWARE */ 441