1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
588 lines
16 KiB
C
588 lines
16 KiB
C
/******************************************************************************
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*
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* Module Name: evmisc - Miscellaneous event manager support functions
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acevents.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evmisc")
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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
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acpi_ev_is_notify_object (
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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_POWER:
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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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#ifdef ACPI_DEBUG_OUTPUT
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static const char *acpi_notify_value_names[] =
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{
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"Bus Check",
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"Device Check",
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"Device Wake",
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"Eject request",
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"Device Check Light",
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"Frequency Mismatch",
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"Bus Mode Mismatch",
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"Power Fault"
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};
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#endif
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acpi_status
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acpi_ev_queue_notify_request (
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struct acpi_namespace_node *node,
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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_obj = NULL;
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union acpi_generic_state *notify_info;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_NAME ("ev_queue_notify_request");
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/*
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* For value 3 (Ejection Request), some device method may need to be run.
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* For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run.
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* For value 0x80 (Status Change) on the power button or sleep button,
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* initiate soft-off or sleep operation?
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Dispatching Notify(%X) on node %p\n", notify_value, node));
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if (notify_value <= 7) {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: %s\n",
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acpi_notify_value_names[notify_value]));
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}
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else {
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Notify value: 0x%2.2X **Device Specific**\n",
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notify_value));
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}
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/* Get the notify object attached to the NS 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 the notify object, Get the right handler */
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switch (node->type) {
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_THERMAL:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_POWER:
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if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
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handler_obj = obj_desc->common_notify.system_notify;
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}
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else {
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handler_obj = obj_desc->common_notify.device_notify;
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}
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break;
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default:
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/* All other types are not supported */
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return (AE_TYPE);
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}
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}
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/* If there is any handler to run, schedule the dispatcher */
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if ((acpi_gbl_system_notify.handler && (notify_value <= ACPI_MAX_SYS_NOTIFY)) ||
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(acpi_gbl_device_notify.handler && (notify_value > ACPI_MAX_SYS_NOTIFY)) ||
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handler_obj) {
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notify_info = acpi_ut_create_generic_state ();
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if (!notify_info) {
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return (AE_NO_MEMORY);
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}
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notify_info->common.data_type = ACPI_DESC_TYPE_STATE_NOTIFY;
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notify_info->notify.node = node;
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notify_info->notify.value = (u16) notify_value;
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notify_info->notify.handler_obj = handler_obj;
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status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
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acpi_ev_notify_dispatch, notify_info);
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if (ACPI_FAILURE (status)) {
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acpi_ut_delete_generic_state (notify_info);
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}
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}
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if (!handler_obj) {
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/*
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* There is no per-device notify handler for this device.
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* This may or may not be a problem.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"No notify handler for Notify(%4.4s, %X) node %p\n",
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acpi_ut_get_node_name (node), notify_value, node));
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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 passsed 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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void ACPI_SYSTEM_XFACE
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acpi_ev_notify_dispatch (
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void *context)
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{
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union acpi_generic_state *notify_info = (union acpi_generic_state *) context;
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acpi_notify_handler global_handler = NULL;
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void *global_context = NULL;
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union acpi_operand_object *handler_obj;
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ACPI_FUNCTION_ENTRY ();
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/*
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* We will invoke a global notify handler if installed.
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* This is done _before_ we invoke the per-device handler attached to the device.
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*/
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if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) {
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/* Global system notification handler */
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if (acpi_gbl_system_notify.handler) {
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global_handler = acpi_gbl_system_notify.handler;
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global_context = acpi_gbl_system_notify.context;
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}
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}
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else {
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/* Global driver notification handler */
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if (acpi_gbl_device_notify.handler) {
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global_handler = acpi_gbl_device_notify.handler;
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global_context = acpi_gbl_device_notify.context;
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}
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}
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/* Invoke the system handler first, if present */
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if (global_handler) {
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global_handler (notify_info->notify.node, notify_info->notify.value, global_context);
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}
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/* Now invoke the per-device handler, if present */
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handler_obj = notify_info->notify.handler_obj;
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if (handler_obj) {
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handler_obj->notify.handler (notify_info->notify.node, notify_info->notify.value,
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handler_obj->notify.context);
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}
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/* All done with the info object */
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acpi_ut_delete_generic_state (notify_info);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_global_lock_thread
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*
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* PARAMETERS: Context - From thread interface, not used
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*
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* RETURN: None
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*
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* DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the
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* Global Lock. Simply signal all threads that are waiting
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* for the lock.
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*
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******************************************************************************/
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static void ACPI_SYSTEM_XFACE
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acpi_ev_global_lock_thread (
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void *context)
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{
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acpi_status status;
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/* Signal threads that are waiting for the lock */
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if (acpi_gbl_global_lock_thread_count) {
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/* Send sufficient units to the semaphore */
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status = acpi_os_signal_semaphore (acpi_gbl_global_lock_semaphore,
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acpi_gbl_global_lock_thread_count);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_ERROR (("Could not signal Global Lock semaphore\n"));
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_global_lock_handler
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*
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* PARAMETERS: Context - From thread interface, not used
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*
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* RETURN: ACPI_INTERRUPT_HANDLED or ACPI_INTERRUPT_NOT_HANDLED
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*
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* DESCRIPTION: Invoked directly from the SCI handler when a global lock
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* release interrupt occurs. Grab the global lock and queue
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* the global lock thread for execution
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*
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******************************************************************************/
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static u32
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acpi_ev_global_lock_handler (
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void *context)
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{
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u8 acquired = FALSE;
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acpi_status status;
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/*
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* Attempt to get the lock
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* If we don't get it now, it will be marked pending and we will
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* take another interrupt when it becomes free.
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*/
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ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
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if (acquired) {
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/* Got the lock, now wake all threads waiting for it */
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acpi_gbl_global_lock_acquired = TRUE;
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/* Run the Global Lock thread which will signal all waiting threads */
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status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
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acpi_ev_global_lock_thread, context);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_ERROR (("Could not queue Global Lock thread, %s\n",
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acpi_format_exception (status)));
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return (ACPI_INTERRUPT_NOT_HANDLED);
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}
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}
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return (ACPI_INTERRUPT_HANDLED);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_init_global_lock_handler
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for the global lock release event
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*
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******************************************************************************/
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acpi_status
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acpi_ev_init_global_lock_handler (void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE ("ev_init_global_lock_handler");
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acpi_gbl_global_lock_present = TRUE;
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status = acpi_install_fixed_event_handler (ACPI_EVENT_GLOBAL,
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acpi_ev_global_lock_handler, NULL);
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/*
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* If the global lock does not exist on this platform, the attempt
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* to enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick)
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* Map to AE_OK, but mark global lock as not present.
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* Any attempt to actually use the global lock will be flagged
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* with an error.
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*/
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if (status == AE_NO_HARDWARE_RESPONSE) {
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acpi_gbl_global_lock_present = FALSE;
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status = AE_OK;
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}
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return_ACPI_STATUS (status);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_ev_acquire_global_lock
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*
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* PARAMETERS: Timeout - Max time to wait for the lock, in millisec.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Attempt to gain ownership of the Global Lock.
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*
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*****************************************************************************/
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acpi_status
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acpi_ev_acquire_global_lock (
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u16 timeout)
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{
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acpi_status status = AE_OK;
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u8 acquired = FALSE;
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ACPI_FUNCTION_TRACE ("ev_acquire_global_lock");
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#ifndef ACPI_APPLICATION
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/* Make sure that we actually have a global lock */
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if (!acpi_gbl_global_lock_present) {
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return_ACPI_STATUS (AE_NO_GLOBAL_LOCK);
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}
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#endif
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/* One more thread wants the global lock */
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acpi_gbl_global_lock_thread_count++;
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/* If we (OS side vs. BIOS side) have the hardware lock already, we are done */
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if (acpi_gbl_global_lock_acquired) {
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return_ACPI_STATUS (AE_OK);
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}
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/* We must acquire the actual hardware lock */
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ACPI_ACQUIRE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, acquired);
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if (acquired) {
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/* We got the lock */
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Acquired the HW Global Lock\n"));
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acpi_gbl_global_lock_acquired = TRUE;
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* Did not get the lock. The pending bit was set above, and we must now
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* wait until we get the global lock released interrupt.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Waiting for the HW Global Lock\n"));
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/*
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* Acquire the global lock semaphore first.
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* Since this wait will block, we must release the interpreter
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*/
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status = acpi_ex_system_wait_semaphore (acpi_gbl_global_lock_semaphore,
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timeout);
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_release_global_lock
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Releases ownership of the Global Lock.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_release_global_lock (void)
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{
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u8 pending = FALSE;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE ("ev_release_global_lock");
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if (!acpi_gbl_global_lock_thread_count) {
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ACPI_REPORT_WARNING(("Cannot release HW Global Lock, it has not been acquired\n"));
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return_ACPI_STATUS (AE_NOT_ACQUIRED);
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}
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/* One fewer thread has the global lock */
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acpi_gbl_global_lock_thread_count--;
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if (acpi_gbl_global_lock_thread_count) {
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/* There are still some threads holding the lock, cannot release */
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* No more threads holding lock, we can do the actual hardware
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* release
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*/
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ACPI_RELEASE_GLOBAL_LOCK (acpi_gbl_common_fACS.global_lock, pending);
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acpi_gbl_global_lock_acquired = FALSE;
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/*
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* If the pending bit was set, we must write GBL_RLS to the control
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* register
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*/
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if (pending) {
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status = acpi_set_register (ACPI_BITREG_GLOBAL_LOCK_RELEASE, 1, ACPI_MTX_LOCK);
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}
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return_ACPI_STATUS (status);
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}
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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
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acpi_ev_terminate (void)
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{
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acpi_native_uint 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.
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* In all cases, on error, 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 ((u32) i, 0);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not disable fixed event %d\n", (u32) i));
|
|
}
|
|
}
|
|
|
|
/* Disable all GPEs in all GPE blocks */
|
|
|
|
status = acpi_ev_walk_gpe_list (acpi_hw_disable_gpe_block, ACPI_NOT_ISR);
|
|
|
|
/* Remove SCI handler */
|
|
|
|
status = acpi_ev_remove_sci_handler ();
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not remove SCI handler\n"));
|
|
}
|
|
}
|
|
|
|
/* Deallocate all handler objects installed within GPE info structs */
|
|
|
|
status = acpi_ev_walk_gpe_list (acpi_ev_delete_gpe_handlers, ACPI_NOT_ISR);
|
|
|
|
/* Return to original mode if necessary */
|
|
|
|
if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
|
|
status = acpi_disable ();
|
|
if (ACPI_FAILURE (status)) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "acpi_disable failed\n"));
|
|
}
|
|
}
|
|
return_VOID;
|
|
}
|
|
|