| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /****************************************************************************** |
| * |
| * Module Name: evmisc - Miscellaneous event manager support functions |
| * |
| * Copyright (C) 2000 - 2022, Intel Corp. |
| * |
| *****************************************************************************/ |
| |
| #include <acpi/acpi.h> |
| #include "accommon.h" |
| #include "acevents.h" |
| #include "acnamesp.h" |
| |
| #define _COMPONENT ACPI_EVENTS |
| ACPI_MODULE_NAME("evmisc") |
| |
| /* Local prototypes */ |
| static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ev_is_notify_object |
| * |
| * PARAMETERS: node - Node to check |
| * |
| * RETURN: TRUE if notifies allowed on this object |
| * |
| * DESCRIPTION: Check type of node for a object that supports notifies. |
| * |
| * TBD: This could be replaced by a flag bit in the node. |
| * |
| ******************************************************************************/ |
| |
| u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node) |
| { |
| |
| switch (node->type) { |
| case ACPI_TYPE_DEVICE: |
| case ACPI_TYPE_PROCESSOR: |
| case ACPI_TYPE_THERMAL: |
| /* |
| * These are the ONLY objects that can receive ACPI notifications |
| */ |
| return (TRUE); |
| |
| default: |
| |
| return (FALSE); |
| } |
| } |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ev_queue_notify_request |
| * |
| * PARAMETERS: node - NS node for the notified object |
| * notify_value - Value from the Notify() request |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Dispatch a device notification event to a previously |
| * installed handler. |
| * |
| ******************************************************************************/ |
| |
| acpi_status |
| acpi_ev_queue_notify_request(struct acpi_namespace_node *node, u32 notify_value) |
| { |
| union acpi_operand_object *obj_desc; |
| union acpi_operand_object *handler_list_head = NULL; |
| union acpi_generic_state *info; |
| u8 handler_list_id = 0; |
| acpi_status status = AE_OK; |
| |
| ACPI_FUNCTION_NAME(ev_queue_notify_request); |
| |
| /* Are Notifies allowed on this object? */ |
| |
| if (!acpi_ev_is_notify_object(node)) { |
| return (AE_TYPE); |
| } |
| |
| /* Get the correct notify list type (System or Device) */ |
| |
| if (notify_value <= ACPI_MAX_SYS_NOTIFY) { |
| handler_list_id = ACPI_SYSTEM_HANDLER_LIST; |
| } else { |
| handler_list_id = ACPI_DEVICE_HANDLER_LIST; |
| } |
| |
| /* Get the notify object attached to the namespace Node */ |
| |
| obj_desc = acpi_ns_get_attached_object(node); |
| if (obj_desc) { |
| |
| /* We have an attached object, Get the correct handler list */ |
| |
| handler_list_head = |
| obj_desc->common_notify.notify_list[handler_list_id]; |
| } |
| |
| /* |
| * If there is no notify handler (Global or Local) |
| * for this object, just ignore the notify |
| */ |
| if (!acpi_gbl_global_notify[handler_list_id].handler |
| && !handler_list_head) { |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "No notify handler for Notify, ignoring (%4.4s, %X) node %p\n", |
| acpi_ut_get_node_name(node), notify_value, |
| node)); |
| |
| return (AE_OK); |
| } |
| |
| /* Setup notify info and schedule the notify dispatcher */ |
| |
| info = acpi_ut_create_generic_state(); |
| if (!info) { |
| return (AE_NO_MEMORY); |
| } |
| |
| info->common.descriptor_type = ACPI_DESC_TYPE_STATE_NOTIFY; |
| |
| info->notify.node = node; |
| info->notify.value = (u16)notify_value; |
| info->notify.handler_list_id = handler_list_id; |
| info->notify.handler_list_head = handler_list_head; |
| info->notify.global = &acpi_gbl_global_notify[handler_list_id]; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| "Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n", |
| acpi_ut_get_node_name(node), |
| acpi_ut_get_type_name(node->type), notify_value, |
| acpi_ut_get_notify_name(notify_value, ACPI_TYPE_ANY), |
| node)); |
| |
| status = acpi_os_execute(OSL_NOTIFY_HANDLER, |
| acpi_ev_notify_dispatch, info); |
| if (ACPI_FAILURE(status)) { |
| acpi_ut_delete_generic_state(info); |
| } |
| |
| return (status); |
| } |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: acpi_ev_notify_dispatch |
| * |
| * PARAMETERS: context - To be passed to the notify handler |
| * |
| * RETURN: None. |
| * |
| * DESCRIPTION: Dispatch a device notification event to a previously |
| * installed handler. |
| * |
| ******************************************************************************/ |
| |
| static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) |
| { |
| union acpi_generic_state *info = (union acpi_generic_state *)context; |
| union acpi_operand_object *handler_obj; |
| |
| ACPI_FUNCTION_ENTRY(); |
| |
| /* Invoke a global notify handler if installed */ |
| |
| if (info->notify.global->handler) { |
| info->notify.global->handler(info->notify.node, |
| info->notify.value, |
| info->notify.global->context); |
| } |
| |
| /* Now invoke the local notify handler(s) if any are installed */ |
| |
| handler_obj = info->notify.handler_list_head; |
| while (handler_obj) { |
| handler_obj->notify.handler(info->notify.node, |
| info->notify.value, |
| handler_obj->notify.context); |
| |
| handler_obj = |
| handler_obj->notify.next[info->notify.handler_list_id]; |
| } |
| |
| /* All done with the info object */ |
| |
| acpi_ut_delete_generic_state(info); |
| } |
| |
| #if (!ACPI_REDUCED_HARDWARE) |
| /****************************************************************************** |
| * |
| * FUNCTION: acpi_ev_terminate |
| * |
| * PARAMETERS: none |
| * |
| * RETURN: none |
| * |
| * DESCRIPTION: Disable events and free memory allocated for table storage. |
| * |
| ******************************************************************************/ |
| |
| void acpi_ev_terminate(void) |
| { |
| u32 i; |
| acpi_status status; |
| |
| ACPI_FUNCTION_TRACE(ev_terminate); |
| |
| if (acpi_gbl_events_initialized) { |
| /* |
| * Disable all event-related functionality. In all cases, on error, |
| * print a message but obviously we don't abort. |
| */ |
| |
| /* Disable all fixed events */ |
| |
| for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) { |
| status = acpi_disable_event(i, 0); |
| if (ACPI_FAILURE(status)) { |
| ACPI_ERROR((AE_INFO, |
| "Could not disable fixed event %u", |
| (u32) i)); |
| } |
| } |
| |
| /* Disable all GPEs in all GPE blocks */ |
| |
| status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Could not disable GPEs in GPE block")); |
| } |
| |
| status = acpi_ev_remove_global_lock_handler(); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Could not remove Global Lock handler")); |
| } |
| |
| acpi_gbl_events_initialized = FALSE; |
| } |
| |
| /* Remove SCI handlers */ |
| |
| status = acpi_ev_remove_all_sci_handlers(); |
| if (ACPI_FAILURE(status)) { |
| ACPI_ERROR((AE_INFO, "Could not remove SCI handler")); |
| } |
| |
| /* Deallocate all handler objects installed within GPE info structs */ |
| |
| status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL); |
| if (ACPI_FAILURE(status)) { |
| ACPI_EXCEPTION((AE_INFO, status, |
| "Could not delete GPE handlers")); |
| } |
| |
| /* Return to original mode if necessary */ |
| |
| if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) { |
| status = acpi_disable(); |
| if (ACPI_FAILURE(status)) { |
| ACPI_WARNING((AE_INFO, "AcpiDisable failed")); |
| } |
| } |
| return_VOID; |
| } |
| |
| #endif /* !ACPI_REDUCED_HARDWARE */ |