1 /****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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/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 /* Local prototypes */ 53 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); 54 55 /******************************************************************************* 56 * 57 * FUNCTION: acpi_ev_is_notify_object 58 * 59 * PARAMETERS: node - Node to check 60 * 61 * RETURN: TRUE if notifies allowed on this object 62 * 63 * DESCRIPTION: Check type of node for a object that supports notifies. 64 * 65 * TBD: This could be replaced by a flag bit in the node. 66 * 67 ******************************************************************************/ 68 69 u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) 70 { 71 switch (node->type) { 72 case ACPI_TYPE_DEVICE: 73 case ACPI_TYPE_PROCESSOR: 74 case ACPI_TYPE_THERMAL: 75 /* 76 * These are the ONLY objects that can receive ACPI notifications 77 */ 78 return (TRUE); 79 80 default: 81 82 return (FALSE); 83 } 84 } 85 86 /******************************************************************************* 87 * 88 * FUNCTION: acpi_ev_queue_notify_request 89 * 90 * PARAMETERS: node - NS node for the notified object 91 * notify_value - Value from the Notify() request 92 * 93 * RETURN: Status 94 * 95 * DESCRIPTION: Dispatch a device notification event to a previously 96 * installed handler. 97 * 98 ******************************************************************************/ 99 100 acpi_status 101 acpi_ev_queue_notify_request(struct acpi_namespace_node * node, 102 u32 notify_value) 103 { 104 union acpi_operand_object *obj_desc; 105 union acpi_operand_object *handler_list_head = NULL; 106 union acpi_generic_state *info; 107 u8 handler_list_id = 0; 108 acpi_status status = AE_OK; 109 110 ACPI_FUNCTION_NAME(ev_queue_notify_request); 111 112 /* Are Notifies allowed on this object? */ 113 114 if (!acpi_ev_is_notify_object(node)) { 115 return (AE_TYPE); 116 } 117 118 /* Get the correct notify list type (System or Device) */ 119 120 if (notify_value <= ACPI_MAX_SYS_NOTIFY) { 121 handler_list_id = ACPI_SYSTEM_HANDLER_LIST; 122 } else { 123 handler_list_id = ACPI_DEVICE_HANDLER_LIST; 124 } 125 126 /* Get the notify object attached to the namespace Node */ 127 128 obj_desc = acpi_ns_get_attached_object(node); 129 if (obj_desc) { 130 131 /* We have an attached object, Get the correct handler list */ 132 133 handler_list_head = 134 obj_desc->common_notify.notify_list[handler_list_id]; 135 } 136 137 /* 138 * If there is no notify handler (Global or Local) 139 * for this object, just ignore the notify 140 */ 141 if (!acpi_gbl_global_notify[handler_list_id].handler 142 && !handler_list_head) { 143 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 144 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", 145 acpi_ut_get_node_name(node), notify_value, 146 node)); 147 148 return (AE_OK); 149 } 150 151 /* Setup notify info and schedule the notify dispatcher */ 152 153 info = acpi_ut_create_generic_state(); 154 if (!info) { 155 return (AE_NO_MEMORY); 156 } 157 158 info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; 159 160 info->notify.node = node; 161 info->notify.value = (u16)notify_value; 162 info->notify.handler_list_id = handler_list_id; 163 info->notify.handler_list_head = handler_list_head; 164 info->notify.global = &acpi_gbl_global_notify[handler_list_id]; 165 166 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 167 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", 168 acpi_ut_get_node_name(node), 169 acpi_ut_get_type_name(node->type), notify_value, 170 acpi_ut_get_notify_name(notify_value, ACPI_TYPE_ANY), 171 node)); 172 173 status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, 174 info); 175 if (ACPI_FAILURE(status)) { 176 acpi_ut_delete_generic_state(info); 177 } 178 179 return (status); 180 } 181 182 /******************************************************************************* 183 * 184 * FUNCTION: acpi_ev_notify_dispatch 185 * 186 * PARAMETERS: context - To be passed to the notify handler 187 * 188 * RETURN: None. 189 * 190 * DESCRIPTION: Dispatch a device notification event to a previously 191 * installed handler. 192 * 193 ******************************************************************************/ 194 195 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) 196 { 197 union acpi_generic_state *info = (union acpi_generic_state *)context; 198 union acpi_operand_object *handler_obj; 199 200 ACPI_FUNCTION_ENTRY(); 201 202 /* Invoke a global notify handler if installed */ 203 204 if (info->notify.global->handler) { 205 info->notify.global->handler(info->notify.node, 206 info->notify.value, 207 info->notify.global->context); 208 } 209 210 /* Now invoke the local notify handler(s) if any are installed */ 211 212 handler_obj = info->notify.handler_list_head; 213 while (handler_obj) { 214 handler_obj->notify.handler(info->notify.node, 215 info->notify.value, 216 handler_obj->notify.context); 217 218 handler_obj = 219 handler_obj->notify.next[info->notify.handler_list_id]; 220 } 221 222 /* All done with the info object */ 223 224 acpi_ut_delete_generic_state(info); 225 } 226 227 #if (!ACPI_REDUCED_HARDWARE) 228 /****************************************************************************** 229 * 230 * FUNCTION: acpi_ev_terminate 231 * 232 * PARAMETERS: none 233 * 234 * RETURN: none 235 * 236 * DESCRIPTION: Disable events and free memory allocated for table storage. 237 * 238 ******************************************************************************/ 239 240 void acpi_ev_terminate(void) 241 { 242 u32 i; 243 acpi_status status; 244 245 ACPI_FUNCTION_TRACE(ev_terminate); 246 247 if (acpi_gbl_events_initialized) { 248 /* 249 * Disable all event-related functionality. In all cases, on error, 250 * print a message but obviously we don't abort. 251 */ 252 253 /* Disable all fixed events */ 254 255 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { 256 status = acpi_disable_event(i, 0); 257 if (ACPI_FAILURE(status)) { 258 ACPI_ERROR((AE_INFO, 259 "Could not disable fixed event %u", 260 (u32) i)); 261 } 262 } 263 264 /* Disable all GPEs in all GPE blocks */ 265 266 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); 267 268 status = acpi_ev_remove_global_lock_handler(); 269 if (ACPI_FAILURE(status)) { 270 ACPI_ERROR((AE_INFO, 271 "Could not remove Global Lock handler")); 272 } 273 274 acpi_gbl_events_initialized = FALSE; 275 } 276 277 /* Remove SCI handlers */ 278 279 status = acpi_ev_remove_all_sci_handlers(); 280 if (ACPI_FAILURE(status)) { 281 ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); 282 } 283 284 /* Deallocate all handler objects installed within GPE info structs */ 285 286 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); 287 288 /* Return to original mode if necessary */ 289 290 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { 291 status = acpi_disable(); 292 if (ACPI_FAILURE(status)) { 293 ACPI_WARNING((AE_INFO, "AcpiDisable failed")); 294 } 295 } 296 return_VOID; 297 } 298 299 #endif /* !ACPI_REDUCED_HARDWARE */ 300