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/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 72 switch (node->type) { 73 case ACPI_TYPE_DEVICE: 74 case ACPI_TYPE_PROCESSOR: 75 case ACPI_TYPE_THERMAL: 76 /* 77 * These are the ONLY objects that can receive ACPI notifications 78 */ 79 return (TRUE); 80 81 default: 82 83 return (FALSE); 84 } 85 } 86 87 /******************************************************************************* 88 * 89 * FUNCTION: acpi_ev_queue_notify_request 90 * 91 * PARAMETERS: node - NS node for the notified object 92 * notify_value - Value from the Notify() request 93 * 94 * RETURN: Status 95 * 96 * DESCRIPTION: Dispatch a device notification event to a previously 97 * installed handler. 98 * 99 ******************************************************************************/ 100 101 acpi_status 102 acpi_ev_queue_notify_request(struct acpi_namespace_node * node, 103 u32 notify_value) 104 { 105 union acpi_operand_object *obj_desc; 106 union acpi_operand_object *handler_list_head = NULL; 107 union acpi_generic_state *info; 108 u8 handler_list_id = 0; 109 acpi_status status = AE_OK; 110 111 ACPI_FUNCTION_NAME(ev_queue_notify_request); 112 113 /* Are Notifies allowed on this object? */ 114 115 if (!acpi_ev_is_notify_object(node)) { 116 return (AE_TYPE); 117 } 118 119 /* Get the correct notify list type (System or Device) */ 120 121 if (notify_value <= ACPI_MAX_SYS_NOTIFY) { 122 handler_list_id = ACPI_SYSTEM_HANDLER_LIST; 123 } else { 124 handler_list_id = ACPI_DEVICE_HANDLER_LIST; 125 } 126 127 /* Get the notify object attached to the namespace Node */ 128 129 obj_desc = acpi_ns_get_attached_object(node); 130 if (obj_desc) { 131 132 /* We have an attached object, Get the correct handler list */ 133 134 handler_list_head = 135 obj_desc->common_notify.notify_list[handler_list_id]; 136 } 137 138 /* 139 * If there is no notify handler (Global or Local) 140 * for this object, just ignore the notify 141 */ 142 if (!acpi_gbl_global_notify[handler_list_id].handler 143 && !handler_list_head) { 144 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 145 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", 146 acpi_ut_get_node_name(node), notify_value, 147 node)); 148 149 return (AE_OK); 150 } 151 152 /* Setup notify info and schedule the notify dispatcher */ 153 154 info = acpi_ut_create_generic_state(); 155 if (!info) { 156 return (AE_NO_MEMORY); 157 } 158 159 info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; 160 161 info->notify.node = node; 162 info->notify.value = (u16)notify_value; 163 info->notify.handler_list_id = handler_list_id; 164 info->notify.handler_list_head = handler_list_head; 165 info->notify.global = &acpi_gbl_global_notify[handler_list_id]; 166 167 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 168 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", 169 acpi_ut_get_node_name(node), 170 acpi_ut_get_type_name(node->type), notify_value, 171 acpi_ut_get_notify_name(notify_value, ACPI_TYPE_ANY), 172 node)); 173 174 status = acpi_os_execute(OSL_NOTIFY_HANDLER, 175 acpi_ev_notify_dispatch, info); 176 if (ACPI_FAILURE(status)) { 177 acpi_ut_delete_generic_state(info); 178 } 179 180 return (status); 181 } 182 183 /******************************************************************************* 184 * 185 * FUNCTION: acpi_ev_notify_dispatch 186 * 187 * PARAMETERS: context - To be passed to the notify handler 188 * 189 * RETURN: None. 190 * 191 * DESCRIPTION: Dispatch a device notification event to a previously 192 * installed handler. 193 * 194 ******************************************************************************/ 195 196 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) 197 { 198 union acpi_generic_state *info = (union acpi_generic_state *)context; 199 union acpi_operand_object *handler_obj; 200 201 ACPI_FUNCTION_ENTRY(); 202 203 /* Invoke a global notify handler if installed */ 204 205 if (info->notify.global->handler) { 206 info->notify.global->handler(info->notify.node, 207 info->notify.value, 208 info->notify.global->context); 209 } 210 211 /* Now invoke the local notify handler(s) if any are installed */ 212 213 handler_obj = info->notify.handler_list_head; 214 while (handler_obj) { 215 handler_obj->notify.handler(info->notify.node, 216 info->notify.value, 217 handler_obj->notify.context); 218 219 handler_obj = 220 handler_obj->notify.next[info->notify.handler_list_id]; 221 } 222 223 /* All done with the info object */ 224 225 acpi_ut_delete_generic_state(info); 226 } 227 228 #if (!ACPI_REDUCED_HARDWARE) 229 /****************************************************************************** 230 * 231 * FUNCTION: acpi_ev_terminate 232 * 233 * PARAMETERS: none 234 * 235 * RETURN: none 236 * 237 * DESCRIPTION: Disable events and free memory allocated for table storage. 238 * 239 ******************************************************************************/ 240 241 void acpi_ev_terminate(void) 242 { 243 u32 i; 244 acpi_status status; 245 246 ACPI_FUNCTION_TRACE(ev_terminate); 247 248 if (acpi_gbl_events_initialized) { 249 /* 250 * Disable all event-related functionality. In all cases, on error, 251 * print a message but obviously we don't abort. 252 */ 253 254 /* Disable all fixed events */ 255 256 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { 257 status = acpi_disable_event(i, 0); 258 if (ACPI_FAILURE(status)) { 259 ACPI_ERROR((AE_INFO, 260 "Could not disable fixed event %u", 261 (u32) i)); 262 } 263 } 264 265 /* Disable all GPEs in all GPE blocks */ 266 267 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); 268 269 status = acpi_ev_remove_global_lock_handler(); 270 if (ACPI_FAILURE(status)) { 271 ACPI_ERROR((AE_INFO, 272 "Could not remove Global Lock handler")); 273 } 274 275 acpi_gbl_events_initialized = FALSE; 276 } 277 278 /* Remove SCI handlers */ 279 280 status = acpi_ev_remove_all_sci_handlers(); 281 if (ACPI_FAILURE(status)) { 282 ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); 283 } 284 285 /* Deallocate all handler objects installed within GPE info structs */ 286 287 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); 288 289 /* Return to original mode if necessary */ 290 291 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { 292 status = acpi_disable(); 293 if (ACPI_FAILURE(status)) { 294 ACPI_WARNING((AE_INFO, "AcpiDisable failed")); 295 } 296 } 297 return_VOID; 298 } 299 300 #endif /* !ACPI_REDUCED_HARDWARE */ 301