Subversion Repositories Kolibri OS

/******************************************************************************

 *

 * Module Name: evmisc - Miscellaneous event manager support functions

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2015, Intel Corp.

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include 

#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);

		status = acpi_ev_remove_global_lock_handler();

		if (ACPI_FAILURE(status)) {

			ACPI_ERROR((AE_INFO,

				    "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);

	/* 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 */