1 /****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #include "acpi.h" 45 #include "accommon.h" 46 #include "acevents.h" 47 #include "acnamesp.h" 48 49 #define _COMPONENT ACPI_EVENTS 50 ACPI_MODULE_NAME ("evmisc") 51 52 53 /* Local prototypes */ 54 55 static void ACPI_SYSTEM_XFACE 56 AcpiEvNotifyDispatch ( 57 void *Context); 58 59 60 /******************************************************************************* 61 * 62 * FUNCTION: AcpiEvIsNotifyObject 63 * 64 * PARAMETERS: Node - Node to check 65 * 66 * RETURN: TRUE if notifies allowed on this object 67 * 68 * DESCRIPTION: Check type of node for a object that supports notifies. 69 * 70 * TBD: This could be replaced by a flag bit in the node. 71 * 72 ******************************************************************************/ 73 74 BOOLEAN 75 AcpiEvIsNotifyObject ( 76 ACPI_NAMESPACE_NODE *Node) 77 { 78 79 switch (Node->Type) 80 { 81 case ACPI_TYPE_DEVICE: 82 case ACPI_TYPE_PROCESSOR: 83 case ACPI_TYPE_THERMAL: 84 /* 85 * These are the ONLY objects that can receive ACPI notifications 86 */ 87 return (TRUE); 88 89 default: 90 91 return (FALSE); 92 } 93 } 94 95 96 /******************************************************************************* 97 * 98 * FUNCTION: AcpiEvQueueNotifyRequest 99 * 100 * PARAMETERS: Node - NS node for the notified object 101 * NotifyValue - Value from the Notify() request 102 * 103 * RETURN: Status 104 * 105 * DESCRIPTION: Dispatch a device notification event to a previously 106 * installed handler. 107 * 108 ******************************************************************************/ 109 110 ACPI_STATUS 111 AcpiEvQueueNotifyRequest ( 112 ACPI_NAMESPACE_NODE *Node, 113 UINT32 NotifyValue) 114 { 115 ACPI_OPERAND_OBJECT *ObjDesc; 116 ACPI_OPERAND_OBJECT *HandlerListHead = NULL; 117 ACPI_GENERIC_STATE *Info; 118 UINT8 HandlerListId = 0; 119 ACPI_STATUS Status = AE_OK; 120 121 122 ACPI_FUNCTION_NAME (EvQueueNotifyRequest); 123 124 125 /* Are Notifies allowed on this object? */ 126 127 if (!AcpiEvIsNotifyObject (Node)) 128 { 129 return (AE_TYPE); 130 } 131 132 /* Get the correct notify list type (System or Device) */ 133 134 if (NotifyValue <= ACPI_MAX_SYS_NOTIFY) 135 { 136 HandlerListId = ACPI_SYSTEM_HANDLER_LIST; 137 } 138 else 139 { 140 HandlerListId = ACPI_DEVICE_HANDLER_LIST; 141 } 142 143 /* Get the notify object attached to the namespace Node */ 144 145 ObjDesc = AcpiNsGetAttachedObject (Node); 146 if (ObjDesc) 147 { 148 /* We have an attached object, Get the correct handler list */ 149 150 HandlerListHead = ObjDesc->CommonNotify.NotifyList[HandlerListId]; 151 } 152 153 /* 154 * If there is no notify handler (Global or Local) 155 * for this object, just ignore the notify 156 */ 157 if (!AcpiGbl_GlobalNotify[HandlerListId].Handler && !HandlerListHead) 158 { 159 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 160 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", 161 AcpiUtGetNodeName (Node), NotifyValue, Node)); 162 163 return (AE_OK); 164 } 165 166 /* Setup notify info and schedule the notify dispatcher */ 167 168 Info = AcpiUtCreateGenericState (); 169 if (!Info) 170 { 171 return (AE_NO_MEMORY); 172 } 173 174 Info->Common.DescriptorType = ACPI_DESC_TYPE_STATE_NOTIFY; 175 176 Info->Notify.Node = Node; 177 Info->Notify.Value = (UINT16) NotifyValue; 178 Info->Notify.HandlerListId = HandlerListId; 179 Info->Notify.HandlerListHead = HandlerListHead; 180 Info->Notify.Global = &AcpiGbl_GlobalNotify[HandlerListId]; 181 182 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 183 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", 184 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type), 185 NotifyValue, AcpiUtGetNotifyName (NotifyValue, ACPI_TYPE_ANY), Node)); 186 187 Status = AcpiOsExecute (OSL_NOTIFY_HANDLER, 188 AcpiEvNotifyDispatch, Info); 189 if (ACPI_FAILURE (Status)) 190 { 191 AcpiUtDeleteGenericState (Info); 192 } 193 194 return (Status); 195 } 196 197 198 /******************************************************************************* 199 * 200 * FUNCTION: AcpiEvNotifyDispatch 201 * 202 * PARAMETERS: Context - To be passed to the notify handler 203 * 204 * RETURN: None. 205 * 206 * DESCRIPTION: Dispatch a device notification event to a previously 207 * installed handler. 208 * 209 ******************************************************************************/ 210 211 static void ACPI_SYSTEM_XFACE 212 AcpiEvNotifyDispatch ( 213 void *Context) 214 { 215 ACPI_GENERIC_STATE *Info = (ACPI_GENERIC_STATE *) Context; 216 ACPI_OPERAND_OBJECT *HandlerObj; 217 218 219 ACPI_FUNCTION_ENTRY (); 220 221 222 /* Invoke a global notify handler if installed */ 223 224 if (Info->Notify.Global->Handler) 225 { 226 Info->Notify.Global->Handler (Info->Notify.Node, 227 Info->Notify.Value, 228 Info->Notify.Global->Context); 229 } 230 231 /* Now invoke the local notify handler(s) if any are installed */ 232 233 HandlerObj = Info->Notify.HandlerListHead; 234 while (HandlerObj) 235 { 236 HandlerObj->Notify.Handler (Info->Notify.Node, 237 Info->Notify.Value, 238 HandlerObj->Notify.Context); 239 240 HandlerObj = HandlerObj->Notify.Next[Info->Notify.HandlerListId]; 241 } 242 243 /* All done with the info object */ 244 245 AcpiUtDeleteGenericState (Info); 246 } 247 248 249 #if (!ACPI_REDUCED_HARDWARE) 250 /****************************************************************************** 251 * 252 * FUNCTION: AcpiEvTerminate 253 * 254 * PARAMETERS: none 255 * 256 * RETURN: none 257 * 258 * DESCRIPTION: Disable events and free memory allocated for table storage. 259 * 260 ******************************************************************************/ 261 262 void 263 AcpiEvTerminate ( 264 void) 265 { 266 UINT32 i; 267 ACPI_STATUS Status; 268 269 270 ACPI_FUNCTION_TRACE (EvTerminate); 271 272 273 if (AcpiGbl_EventsInitialized) 274 { 275 /* 276 * Disable all event-related functionality. In all cases, on error, 277 * print a message but obviously we don't abort. 278 */ 279 280 /* Disable all fixed events */ 281 282 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) 283 { 284 Status = AcpiDisableEvent (i, 0); 285 if (ACPI_FAILURE (Status)) 286 { 287 ACPI_ERROR ((AE_INFO, 288 "Could not disable fixed event %u", (UINT32) i)); 289 } 290 } 291 292 /* Disable all GPEs in all GPE blocks */ 293 294 Status = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL); 295 296 Status = AcpiEvRemoveGlobalLockHandler (); 297 if (ACPI_FAILURE(Status)) 298 { 299 ACPI_ERROR ((AE_INFO, 300 "Could not remove Global Lock handler")); 301 } 302 303 AcpiGbl_EventsInitialized = FALSE; 304 } 305 306 /* Remove SCI handlers */ 307 308 Status = AcpiEvRemoveAllSciHandlers (); 309 if (ACPI_FAILURE(Status)) 310 { 311 ACPI_ERROR ((AE_INFO, 312 "Could not remove SCI handler")); 313 } 314 315 /* Deallocate all handler objects installed within GPE info structs */ 316 317 Status = AcpiEvWalkGpeList (AcpiEvDeleteGpeHandlers, NULL); 318 319 /* Return to original mode if necessary */ 320 321 if (AcpiGbl_OriginalMode == ACPI_SYS_MODE_LEGACY) 322 { 323 Status = AcpiDisable (); 324 if (ACPI_FAILURE (Status)) 325 { 326 ACPI_WARNING ((AE_INFO, "AcpiDisable failed")); 327 } 328 } 329 return_VOID; 330 } 331 332 #endif /* !ACPI_REDUCED_HARDWARE */ 333