274 lines
7.1 KiB
C
274 lines
7.1 KiB
C
// 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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