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