linux/drivers/acpi/acpica/evmisc.c

// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
 *
 * Module Name: evmisc - Miscellaneous event manager support functions
 *
 * Copyright (C) 2000 - 2023, Intel Corp.
 *
 *****************************************************************************/

#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"

#define _COMPONENT …
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)
{ … }

/*******************************************************************************
 *
 * 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)
{ … }

/*******************************************************************************
 *
 * 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)
{ … }

#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 */