1 /****************************************************************************** 2 * 3 * Module Name: evmisc - Miscellaneous event manager support functions 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2012, 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 return (FALSE); 82 } 83 } 84 85 /******************************************************************************* 86 * 87 * FUNCTION: acpi_ev_queue_notify_request 88 * 89 * PARAMETERS: node - NS node for the notified object 90 * notify_value - Value from the Notify() request 91 * 92 * RETURN: Status 93 * 94 * DESCRIPTION: Dispatch a device notification event to a previously 95 * installed handler. 96 * 97 ******************************************************************************/ 98 99 acpi_status 100 acpi_ev_queue_notify_request(struct acpi_namespace_node * node, 101 u32 notify_value) 102 { 103 union acpi_operand_object *obj_desc; 104 union acpi_operand_object *handler_list_head = NULL; 105 union acpi_generic_state *info; 106 u8 handler_list_id = 0; 107 acpi_status status = AE_OK; 108 109 ACPI_FUNCTION_NAME(ev_queue_notify_request); 110 111 /* Are Notifies allowed on this object? */ 112 113 if (!acpi_ev_is_notify_object(node)) { 114 return (AE_TYPE); 115 } 116 117 /* Get the correct notify list type (System or Device) */ 118 119 if (notify_value <= ACPI_MAX_SYS_NOTIFY) { 120 handler_list_id = ACPI_SYSTEM_HANDLER_LIST; 121 } else { 122 handler_list_id = ACPI_DEVICE_HANDLER_LIST; 123 } 124 125 /* Get the notify object attached to the namespace Node */ 126 127 obj_desc = acpi_ns_get_attached_object(node); 128 if (obj_desc) { 129 130 /* We have an attached object, Get the correct handler list */ 131 132 handler_list_head = 133 obj_desc->common_notify.notify_list[handler_list_id]; 134 } 135 136 /* 137 * If there is no notify handler (Global or Local) 138 * for this object, just ignore the notify 139 */ 140 if (!acpi_gbl_global_notify[handler_list_id].handler 141 && !handler_list_head) { 142 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 143 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", 144 acpi_ut_get_node_name(node), notify_value, 145 node)); 146 147 return (AE_OK); 148 } 149 150 /* Setup notify info and schedule the notify dispatcher */ 151 152 info = acpi_ut_create_generic_state(); 153 if (!info) { 154 return (AE_NO_MEMORY); 155 } 156 157 info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; 158 159 info->notify.node = node; 160 info->notify.value = (u16)notify_value; 161 info->notify.handler_list_id = handler_list_id; 162 info->notify.handler_list_head = handler_list_head; 163 info->notify.global = &acpi_gbl_global_notify[handler_list_id]; 164 165 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 166 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", 167 acpi_ut_get_node_name(node), 168 acpi_ut_get_type_name(node->type), notify_value, 169 acpi_ut_get_notify_name(notify_value), node)); 170 171 status = acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch, 172 info); 173 if (ACPI_FAILURE(status)) { 174 acpi_ut_delete_generic_state(info); 175 } 176 177 return (status); 178 } 179 180 /******************************************************************************* 181 * 182 * FUNCTION: acpi_ev_notify_dispatch 183 * 184 * PARAMETERS: context - To be passed to the notify handler 185 * 186 * RETURN: None. 187 * 188 * DESCRIPTION: Dispatch a device notification event to a previously 189 * installed handler. 190 * 191 ******************************************************************************/ 192 193 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) 194 { 195 union acpi_generic_state *info = (union acpi_generic_state *)context; 196 union acpi_operand_object *handler_obj; 197 198 ACPI_FUNCTION_ENTRY(); 199 200 /* Invoke a global notify handler if installed */ 201 202 if (info->notify.global->handler) { 203 info->notify.global->handler(info->notify.node, 204 info->notify.value, 205 info->notify.global->context); 206 } 207 208 /* Now invoke the local notify handler(s) if any are installed */ 209 210 handler_obj = info->notify.handler_list_head; 211 while (handler_obj) { 212 handler_obj->notify.handler(info->notify.node, 213 info->notify.value, 214 handler_obj->notify.context); 215 216 handler_obj = 217 handler_obj->notify.next[info->notify.handler_list_id]; 218 } 219 220 /* All done with the info object */ 221 222 acpi_ut_delete_generic_state(info); 223 } 224 225 #if (!ACPI_REDUCED_HARDWARE) 226 /****************************************************************************** 227 * 228 * FUNCTION: acpi_ev_terminate 229 * 230 * PARAMETERS: none 231 * 232 * RETURN: none 233 * 234 * DESCRIPTION: Disable events and free memory allocated for table storage. 235 * 236 ******************************************************************************/ 237 238 void acpi_ev_terminate(void) 239 { 240 u32 i; 241 acpi_status status; 242 243 ACPI_FUNCTION_TRACE(ev_terminate); 244 245 if (acpi_gbl_events_initialized) { 246 /* 247 * Disable all event-related functionality. In all cases, on error, 248 * print a message but obviously we don't abort. 249 */ 250 251 /* Disable all fixed events */ 252 253 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { 254 status = acpi_disable_event(i, 0); 255 if (ACPI_FAILURE(status)) { 256 ACPI_ERROR((AE_INFO, 257 "Could not disable fixed event %u", 258 (u32) i)); 259 } 260 } 261 262 /* Disable all GPEs in all GPE blocks */ 263 264 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); 265 266 /* Remove SCI handler */ 267 268 status = acpi_ev_remove_sci_handler(); 269 if (ACPI_FAILURE(status)) { 270 ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); 271 } 272 273 status = acpi_ev_remove_global_lock_handler(); 274 if (ACPI_FAILURE(status)) { 275 ACPI_ERROR((AE_INFO, 276 "Could not remove Global Lock handler")); 277 } 278 } 279 280 /* Deallocate all handler objects installed within GPE info structs */ 281 282 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); 283 284 /* Return to original mode if necessary */ 285 286 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { 287 status = acpi_disable(); 288 if (ACPI_FAILURE(status)) { 289 ACPI_WARNING((AE_INFO, "AcpiDisable failed")); 290 } 291 } 292 return_VOID; 293 } 294 295 #endif /* !ACPI_REDUCED_HARDWARE */ 296