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1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.02/******************************************************************************3 *4 * Module Name: evmisc - Miscellaneous event manager support functions5 *6 * Copyright (C) 2000 - 2023, Intel Corp.7 *8 *****************************************************************************/9 10#include <acpi/acpi.h>11#include "accommon.h"12#include "acevents.h"13#include "acnamesp.h"14 15#define _COMPONENT ACPI_EVENTS16ACPI_MODULE_NAME("evmisc")17 18/* Local prototypes */19static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context);20 21/*******************************************************************************22 *23 * FUNCTION: acpi_ev_is_notify_object24 *25 * PARAMETERS: node - Node to check26 *27 * RETURN: TRUE if notifies allowed on this object28 *29 * DESCRIPTION: Check type of node for a object that supports notifies.30 *31 * TBD: This could be replaced by a flag bit in the node.32 *33 ******************************************************************************/34 35u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node)36{37 38 switch (node->type) {39 case ACPI_TYPE_DEVICE:40 case ACPI_TYPE_PROCESSOR:41 case ACPI_TYPE_THERMAL:42 /*43 * These are the ONLY objects that can receive ACPI notifications44 */45 return (TRUE);46 47 default:48 49 return (FALSE);50 }51}52 53/*******************************************************************************54 *55 * FUNCTION: acpi_ev_queue_notify_request56 *57 * PARAMETERS: node - NS node for the notified object58 * notify_value - Value from the Notify() request59 *60 * RETURN: Status61 *62 * DESCRIPTION: Dispatch a device notification event to a previously63 * installed handler.64 *65 ******************************************************************************/66 67acpi_status68acpi_ev_queue_notify_request(struct acpi_namespace_node *node, u32 notify_value)69{70 union acpi_operand_object *obj_desc;71 union acpi_operand_object *handler_list_head = NULL;72 union acpi_generic_state *info;73 u8 handler_list_id = 0;74 acpi_status status = AE_OK;75 76 ACPI_FUNCTION_NAME(ev_queue_notify_request);77 78 /* Are Notifies allowed on this object? */79 80 if (!acpi_ev_is_notify_object(node)) {81 return (AE_TYPE);82 }83 84 /* Get the correct notify list type (System or Device) */85 86 if (notify_value <= ACPI_MAX_SYS_NOTIFY) {87 handler_list_id = ACPI_SYSTEM_HANDLER_LIST;88 } else {89 handler_list_id = ACPI_DEVICE_HANDLER_LIST;90 }91 92 /* Get the notify object attached to the namespace Node */93 94 obj_desc = acpi_ns_get_attached_object(node);95 if (obj_desc) {96 97 /* We have an attached object, Get the correct handler list */98 99 handler_list_head =100 obj_desc->common_notify.notify_list[handler_list_id];101 }102 103 /*104 * If there is no notify handler (Global or Local)105 * for this object, just ignore the notify106 */107 if (!acpi_gbl_global_notify[handler_list_id].handler108 && !handler_list_head) {109 ACPI_DEBUG_PRINT((ACPI_DB_INFO,110 "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n",111 acpi_ut_get_node_name(node), notify_value,112 node));113 114 return (AE_OK);115 }116 117 /* Setup notify info and schedule the notify dispatcher */118 119 info = acpi_ut_create_generic_state();120 if (!info) {121 return (AE_NO_MEMORY);122 }123 124 info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY;125 126 info->notify.node = node;127 info->notify.value = (u16)notify_value;128 info->notify.handler_list_id = handler_list_id;129 info->notify.handler_list_head = handler_list_head;130 info->notify.global = &acpi_gbl_global_notify[handler_list_id];131 132 ACPI_DEBUG_PRINT((ACPI_DB_INFO,133 "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n",134 acpi_ut_get_node_name(node),135 acpi_ut_get_type_name(node->type), notify_value,136 acpi_ut_get_notify_name(notify_value, ACPI_TYPE_ANY),137 node));138 139 status = acpi_os_execute(OSL_NOTIFY_HANDLER,140 acpi_ev_notify_dispatch, info);141 if (ACPI_FAILURE(status)) {142 acpi_ut_delete_generic_state(info);143 }144 145 return (status);146}147 148/*******************************************************************************149 *150 * FUNCTION: acpi_ev_notify_dispatch151 *152 * PARAMETERS: context - To be passed to the notify handler153 *154 * RETURN: None.155 *156 * DESCRIPTION: Dispatch a device notification event to a previously157 * installed handler.158 *159 ******************************************************************************/160 161static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)162{163 union acpi_generic_state *info = (union acpi_generic_state *)context;164 union acpi_operand_object *handler_obj;165 166 ACPI_FUNCTION_ENTRY();167 168 /* Invoke a global notify handler if installed */169 170 if (info->notify.global->handler) {171 info->notify.global->handler(info->notify.node,172 info->notify.value,173 info->notify.global->context);174 }175 176 /* Now invoke the local notify handler(s) if any are installed */177 178 handler_obj = info->notify.handler_list_head;179 while (handler_obj) {180 handler_obj->notify.handler(info->notify.node,181 info->notify.value,182 handler_obj->notify.context);183 184 handler_obj =185 handler_obj->notify.next[info->notify.handler_list_id];186 }187 188 /* All done with the info object */189 190 acpi_ut_delete_generic_state(info);191}192 193#if (!ACPI_REDUCED_HARDWARE)194/******************************************************************************195 *196 * FUNCTION: acpi_ev_terminate197 *198 * PARAMETERS: none199 *200 * RETURN: none201 *202 * DESCRIPTION: Disable events and free memory allocated for table storage.203 *204 ******************************************************************************/205 206void acpi_ev_terminate(void)207{208 u32 i;209 acpi_status status;210 211 ACPI_FUNCTION_TRACE(ev_terminate);212 213 if (acpi_gbl_events_initialized) {214 /*215 * Disable all event-related functionality. In all cases, on error,216 * print a message but obviously we don't abort.217 */218 219 /* Disable all fixed events */220 221 for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {222 status = acpi_disable_event(i, 0);223 if (ACPI_FAILURE(status)) {224 ACPI_ERROR((AE_INFO,225 "Could not disable fixed event %u",226 (u32) i));227 }228 }229 230 /* Disable all GPEs in all GPE blocks */231 232 status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);233 if (ACPI_FAILURE(status)) {234 ACPI_EXCEPTION((AE_INFO, status,235 "Could not disable GPEs in GPE block"));236 }237 238 status = acpi_ev_remove_global_lock_handler();239 if (ACPI_FAILURE(status)) {240 ACPI_EXCEPTION((AE_INFO, status,241 "Could not remove Global Lock handler"));242 }243 244 acpi_gbl_events_initialized = FALSE;245 }246 247 /* Remove SCI handlers */248 249 status = acpi_ev_remove_all_sci_handlers();250 if (ACPI_FAILURE(status)) {251 ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));252 }253 254 /* Deallocate all handler objects installed within GPE info structs */255 256 status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL);257 if (ACPI_FAILURE(status)) {258 ACPI_EXCEPTION((AE_INFO, status,259 "Could not delete GPE handlers"));260 }261 262 /* Return to original mode if necessary */263 264 if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {265 status = acpi_disable();266 if (ACPI_FAILURE(status)) {267 ACPI_WARNING((AE_INFO, "AcpiDisable failed"));268 }269 }270 return_VOID;271}272 273#endif /* !ACPI_REDUCED_HARDWARE */274