1 /****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2013, 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), node)); 171 172 status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, 173 info); 174 if (ACPI_FAILURE(status)) { 175 acpi_ut_delete_generic_state(info); 176 } 177 178 return (status); 179 } 180 181 /******************************************************************************* 182 * 183 * FUNCTION: acpi_ev_notify_dispatch 184 * 185 * PARAMETERS: context - To be passed to the notify handler 186 * 187 * RETURN: None. 188 * 189 * DESCRIPTION: Dispatch a device notification event to a previously 190 * installed handler. 191 * 192 ******************************************************************************/ 193 194 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) 195 { 196 union acpi_generic_state *info = (union acpi_generic_state *)context; 197 union acpi_operand_object *handler_obj; 198 199 ACPI_FUNCTION_ENTRY(); 200 201 /* Invoke a global notify handler if installed */ 202 203 if (info->notify.global->handler) { 204 info->notify.global->handler(info->notify.node, 205 info->notify.value, 206 info->notify.global->context); 207 } 208 209 /* Now invoke the local notify handler(s) if any are installed */ 210 211 handler_obj = info->notify.handler_list_head; 212 while (handler_obj) { 213 handler_obj->notify.handler(info->notify.node, 214 info->notify.value, 215 handler_obj->notify.context); 216 217 handler_obj = 218 handler_obj->notify.next[info->notify.handler_list_id]; 219 } 220 221 /* All done with the info object */ 222 223 acpi_ut_delete_generic_state(info); 224 } 225 226 #if (!ACPI_REDUCED_HARDWARE) 227 /****************************************************************************** 228 * 229 * FUNCTION: acpi_ev_terminate 230 * 231 * PARAMETERS: none 232 * 233 * RETURN: none 234 * 235 * DESCRIPTION: Disable events and free memory allocated for table storage. 236 * 237 ******************************************************************************/ 238 239 void acpi_ev_terminate(void) 240 { 241 u32 i; 242 acpi_status status; 243 244 ACPI_FUNCTION_TRACE(ev_terminate); 245 246 if (acpi_gbl_events_initialized) { 247 /* 248 * Disable all event-related functionality. In all cases, on error, 249 * print a message but obviously we don't abort. 250 */ 251 252 /* Disable all fixed events */ 253 254 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { 255 status = acpi_disable_event(i, 0); 256 if (ACPI_FAILURE(status)) { 257 ACPI_ERROR((AE_INFO, 258 "Could not disable fixed event %u", 259 (u32) i)); 260 } 261 } 262 263 /* Disable all GPEs in all GPE blocks */ 264 265 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); 266 267 status = acpi_ev_remove_global_lock_handler(); 268 if (ACPI_FAILURE(status)) { 269 ACPI_ERROR((AE_INFO, 270 "Could not remove Global Lock handler")); 271 } 272 273 acpi_gbl_events_initialized = FALSE; 274 } 275 276 /* Remove SCI handlers */ 277 278 status = acpi_ev_remove_all_sci_handlers(); 279 if (ACPI_FAILURE(status)) { 280 ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); 281 } 282 283 /* Deallocate all handler objects installed within GPE info structs */ 284 285 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); 286 287 /* Return to original mode if necessary */ 288 289 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { 290 status = acpi_disable(); 291 if (ACPI_FAILURE(status)) { 292 ACPI_WARNING((AE_INFO, "AcpiDisable failed")); 293 } 294 } 295 return_VOID; 296 } 297 298 #endif /* !ACPI_REDUCED_HARDWARE */ 299