1 /****************************************************************************** 2 * 3 * Module Name: evgpeutil - GPE utilities 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" 155 156 #define _COMPONENT ACPI_EVENTS 157 ACPI_MODULE_NAME ("evgpeutil") 158 159 160 #if (!ACPI_REDUCED_HARDWARE) /* Entire module */ 161 /******************************************************************************* 162 * 163 * FUNCTION: AcpiEvWalkGpeList 164 * 165 * PARAMETERS: GpeWalkCallback - Routine called for each GPE block 166 * Context - Value passed to callback 167 * 168 * RETURN: Status 169 * 170 * DESCRIPTION: Walk the GPE lists. 171 * 172 ******************************************************************************/ 173 174 ACPI_STATUS 175 AcpiEvWalkGpeList ( 176 ACPI_GPE_CALLBACK GpeWalkCallback, 177 void *Context) 178 { 179 ACPI_GPE_BLOCK_INFO *GpeBlock; 180 ACPI_GPE_XRUPT_INFO *GpeXruptInfo; 181 ACPI_STATUS Status = AE_OK; 182 ACPI_CPU_FLAGS Flags; 183 184 185 ACPI_FUNCTION_TRACE (EvWalkGpeList); 186 187 188 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 189 190 /* Walk the interrupt level descriptor list */ 191 192 GpeXruptInfo = AcpiGbl_GpeXruptListHead; 193 while (GpeXruptInfo) 194 { 195 /* Walk all Gpe Blocks attached to this interrupt level */ 196 197 GpeBlock = GpeXruptInfo->GpeBlockListHead; 198 while (GpeBlock) 199 { 200 /* One callback per GPE block */ 201 202 Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context); 203 if (ACPI_FAILURE (Status)) 204 { 205 if (Status == AE_CTRL_END) /* Callback abort */ 206 { 207 Status = AE_OK; 208 } 209 goto UnlockAndExit; 210 } 211 212 GpeBlock = GpeBlock->Next; 213 } 214 215 GpeXruptInfo = GpeXruptInfo->Next; 216 } 217 218 UnlockAndExit: 219 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 220 return_ACPI_STATUS (Status); 221 } 222 223 224 /******************************************************************************* 225 * 226 * FUNCTION: AcpiEvGetGpeDevice 227 * 228 * PARAMETERS: GPE_WALK_CALLBACK 229 * 230 * RETURN: Status 231 * 232 * DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE 233 * block device. NULL if the GPE is one of the FADT-defined GPEs. 234 * 235 ******************************************************************************/ 236 237 ACPI_STATUS 238 AcpiEvGetGpeDevice ( 239 ACPI_GPE_XRUPT_INFO *GpeXruptInfo, 240 ACPI_GPE_BLOCK_INFO *GpeBlock, 241 void *Context) 242 { 243 ACPI_GPE_DEVICE_INFO *Info = Context; 244 245 246 /* Increment Index by the number of GPEs in this block */ 247 248 Info->NextBlockBaseIndex += GpeBlock->GpeCount; 249 250 if (Info->Index < Info->NextBlockBaseIndex) 251 { 252 /* 253 * The GPE index is within this block, get the node. Leave the node 254 * NULL for the FADT-defined GPEs 255 */ 256 if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE) 257 { 258 Info->GpeDevice = GpeBlock->Node; 259 } 260 261 Info->Status = AE_OK; 262 return (AE_CTRL_END); 263 } 264 265 return (AE_OK); 266 } 267 268 269 /******************************************************************************* 270 * 271 * FUNCTION: AcpiEvGetGpeXruptBlock 272 * 273 * PARAMETERS: InterruptNumber - Interrupt for a GPE block 274 * GpeXruptBlock - Where the block is returned 275 * 276 * RETURN: Status 277 * 278 * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt 279 * block per unique interrupt level used for GPEs. Should be 280 * called only when the GPE lists are semaphore locked and not 281 * subject to change. 282 * 283 ******************************************************************************/ 284 285 ACPI_STATUS 286 AcpiEvGetGpeXruptBlock ( 287 UINT32 InterruptNumber, 288 ACPI_GPE_XRUPT_INFO **GpeXruptBlock) 289 { 290 ACPI_GPE_XRUPT_INFO *NextGpeXrupt; 291 ACPI_GPE_XRUPT_INFO *GpeXrupt; 292 ACPI_STATUS Status; 293 ACPI_CPU_FLAGS Flags; 294 295 296 ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock); 297 298 299 /* No need for lock since we are not changing any list elements here */ 300 301 NextGpeXrupt = AcpiGbl_GpeXruptListHead; 302 while (NextGpeXrupt) 303 { 304 if (NextGpeXrupt->InterruptNumber == InterruptNumber) 305 { 306 *GpeXruptBlock = NextGpeXrupt; 307 return_ACPI_STATUS (AE_OK); 308 } 309 310 NextGpeXrupt = NextGpeXrupt->Next; 311 } 312 313 /* Not found, must allocate a new xrupt descriptor */ 314 315 GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO)); 316 if (!GpeXrupt) 317 { 318 return_ACPI_STATUS (AE_NO_MEMORY); 319 } 320 321 GpeXrupt->InterruptNumber = InterruptNumber; 322 323 /* Install new interrupt descriptor with spin lock */ 324 325 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 326 if (AcpiGbl_GpeXruptListHead) 327 { 328 NextGpeXrupt = AcpiGbl_GpeXruptListHead; 329 while (NextGpeXrupt->Next) 330 { 331 NextGpeXrupt = NextGpeXrupt->Next; 332 } 333 334 NextGpeXrupt->Next = GpeXrupt; 335 GpeXrupt->Previous = NextGpeXrupt; 336 } 337 else 338 { 339 AcpiGbl_GpeXruptListHead = GpeXrupt; 340 } 341 342 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 343 344 /* Install new interrupt handler if not SCI_INT */ 345 346 if (InterruptNumber != AcpiGbl_FADT.SciInterrupt) 347 { 348 Status = AcpiOsInstallInterruptHandler (InterruptNumber, 349 AcpiEvGpeXruptHandler, GpeXrupt); 350 if (ACPI_FAILURE (Status)) 351 { 352 ACPI_EXCEPTION ((AE_INFO, Status, 353 "Could not install GPE interrupt handler at level 0x%X", 354 InterruptNumber)); 355 return_ACPI_STATUS (Status); 356 } 357 } 358 359 *GpeXruptBlock = GpeXrupt; 360 return_ACPI_STATUS (AE_OK); 361 } 362 363 364 /******************************************************************************* 365 * 366 * FUNCTION: AcpiEvDeleteGpeXrupt 367 * 368 * PARAMETERS: GpeXrupt - A GPE interrupt info block 369 * 370 * RETURN: Status 371 * 372 * DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated 373 * interrupt handler if not the SCI interrupt. 374 * 375 ******************************************************************************/ 376 377 ACPI_STATUS 378 AcpiEvDeleteGpeXrupt ( 379 ACPI_GPE_XRUPT_INFO *GpeXrupt) 380 { 381 ACPI_STATUS Status; 382 ACPI_CPU_FLAGS Flags; 383 384 385 ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt); 386 387 388 /* We never want to remove the SCI interrupt handler */ 389 390 if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt) 391 { 392 GpeXrupt->GpeBlockListHead = NULL; 393 return_ACPI_STATUS (AE_OK); 394 } 395 396 /* Disable this interrupt */ 397 398 Status = AcpiOsRemoveInterruptHandler ( 399 GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler); 400 if (ACPI_FAILURE (Status)) 401 { 402 return_ACPI_STATUS (Status); 403 } 404 405 /* Unlink the interrupt block with lock */ 406 407 Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock); 408 if (GpeXrupt->Previous) 409 { 410 GpeXrupt->Previous->Next = GpeXrupt->Next; 411 } 412 else 413 { 414 /* No previous, update list head */ 415 416 AcpiGbl_GpeXruptListHead = GpeXrupt->Next; 417 } 418 419 if (GpeXrupt->Next) 420 { 421 GpeXrupt->Next->Previous = GpeXrupt->Previous; 422 } 423 AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags); 424 425 /* Free the block */ 426 427 ACPI_FREE (GpeXrupt); 428 return_ACPI_STATUS (AE_OK); 429 } 430 431 432 /******************************************************************************* 433 * 434 * FUNCTION: AcpiEvDeleteGpeHandlers 435 * 436 * PARAMETERS: GpeXruptInfo - GPE Interrupt info 437 * GpeBlock - Gpe Block info 438 * 439 * RETURN: Status 440 * 441 * DESCRIPTION: Delete all Handler objects found in the GPE data structs. 442 * Used only prior to termination. 443 * 444 ******************************************************************************/ 445 446 ACPI_STATUS 447 AcpiEvDeleteGpeHandlers ( 448 ACPI_GPE_XRUPT_INFO *GpeXruptInfo, 449 ACPI_GPE_BLOCK_INFO *GpeBlock, 450 void *Context) 451 { 452 ACPI_GPE_EVENT_INFO *GpeEventInfo; 453 ACPI_GPE_NOTIFY_INFO *Notify; 454 ACPI_GPE_NOTIFY_INFO *Next; 455 UINT32 i; 456 UINT32 j; 457 458 459 ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers); 460 461 462 /* Examine each GPE Register within the block */ 463 464 for (i = 0; i < GpeBlock->RegisterCount; i++) 465 { 466 /* Now look at the individual GPEs in this byte register */ 467 468 for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) 469 { 470 GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i * 471 ACPI_GPE_REGISTER_WIDTH) + j]; 472 473 if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == 474 ACPI_GPE_DISPATCH_HANDLER) || 475 (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == 476 ACPI_GPE_DISPATCH_RAW_HANDLER)) 477 { 478 /* Delete an installed handler block */ 479 480 ACPI_FREE (GpeEventInfo->Dispatch.Handler); 481 GpeEventInfo->Dispatch.Handler = NULL; 482 GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; 483 } 484 else if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) == 485 ACPI_GPE_DISPATCH_NOTIFY) 486 { 487 /* Delete the implicit notification device list */ 488 489 Notify = GpeEventInfo->Dispatch.NotifyList; 490 while (Notify) 491 { 492 Next = Notify->Next; 493 ACPI_FREE (Notify); 494 Notify = Next; 495 } 496 497 GpeEventInfo->Dispatch.NotifyList = NULL; 498 GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; 499 } 500 } 501 } 502 503 return_ACPI_STATUS (AE_OK); 504 } 505 506 #endif /* !ACPI_REDUCED_HARDWARE */ 507