mirror of
https://github.com/reactos/reactos.git
synced 2024-09-20 09:40:52 +00:00
440 lines
11 KiB
C
440 lines
11 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evmisc - ACPI device notification handler dispatch
|
|
* and ACPI Global Lock support
|
|
* $Revision: 1.1 $
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000, 2001 R. Byron Moore
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <acpi.h>
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
MODULE_NAME ("evmisc")
|
|
|
|
|
|
/**************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_queue_notify_request
|
|
*
|
|
* PARAMETERS:
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Dispatch a device notification event to a previously
|
|
* installed handler.
|
|
*
|
|
*************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
acpi_ev_queue_notify_request (
|
|
ACPI_NAMESPACE_NODE *node,
|
|
u32 notify_value)
|
|
{
|
|
ACPI_OPERAND_OBJECT *obj_desc;
|
|
ACPI_OPERAND_OBJECT *handler_obj = NULL;
|
|
ACPI_GENERIC_STATE *notify_info;
|
|
ACPI_STATUS status = AE_OK;
|
|
|
|
|
|
/*
|
|
* For value 1 (Ejection Request), some device method may need to be run.
|
|
* For value 2 (Device Wake) if _PRW exists, the _PS0 method may need to be run.
|
|
* For value 0x80 (Status Change) on the power button or sleep button,
|
|
* initiate soft-off or sleep operation?
|
|
*/
|
|
|
|
switch (notify_value) {
|
|
case 0:
|
|
break;
|
|
|
|
case 1:
|
|
break;
|
|
|
|
case 2:
|
|
break;
|
|
|
|
case 0x80:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
/*
|
|
* Get the notify object attached to the device Node
|
|
*/
|
|
|
|
obj_desc = acpi_ns_get_attached_object ((ACPI_HANDLE) node);
|
|
if (obj_desc) {
|
|
|
|
/* We have the notify object, Get the right handler */
|
|
|
|
switch (node->type) {
|
|
case ACPI_TYPE_DEVICE:
|
|
if (notify_value <= MAX_SYS_NOTIFY) {
|
|
handler_obj = obj_desc->device.sys_handler;
|
|
}
|
|
else {
|
|
handler_obj = obj_desc->device.drv_handler;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_THERMAL:
|
|
if (notify_value <= MAX_SYS_NOTIFY) {
|
|
handler_obj = obj_desc->thermal_zone.sys_handler;
|
|
}
|
|
else {
|
|
handler_obj = obj_desc->thermal_zone.drv_handler;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/* If there is any handler to run, schedule the dispatcher */
|
|
|
|
if ((acpi_gbl_sys_notify.handler && (notify_value <= MAX_SYS_NOTIFY)) ||
|
|
(acpi_gbl_drv_notify.handler && (notify_value > MAX_SYS_NOTIFY)) ||
|
|
handler_obj) {
|
|
|
|
notify_info = acpi_cm_create_generic_state ();
|
|
if (!notify_info) {
|
|
return (AE_NO_MEMORY);
|
|
}
|
|
|
|
notify_info->notify.node = node;
|
|
notify_info->notify.value = (u16) notify_value;
|
|
notify_info->notify.handler_obj = handler_obj;
|
|
|
|
status = acpi_os_queue_for_execution (OSD_PRIORITY_HIGH,
|
|
acpi_ev_notify_dispatch, notify_info);
|
|
if (ACPI_FAILURE (status)) {
|
|
acpi_cm_delete_generic_state (notify_info);
|
|
}
|
|
}
|
|
|
|
if (!handler_obj) {
|
|
/* There is no per-device notify handler for this device */
|
|
|
|
}
|
|
|
|
|
|
return (status);
|
|
}
|
|
|
|
|
|
/**************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_notify_dispatch
|
|
*
|
|
* PARAMETERS:
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Dispatch a device notification event to a previously
|
|
* installed handler.
|
|
*
|
|
*************************************************************************/
|
|
|
|
void
|
|
acpi_ev_notify_dispatch (
|
|
void *context)
|
|
{
|
|
ACPI_GENERIC_STATE *notify_info = (ACPI_GENERIC_STATE *) context;
|
|
NOTIFY_HANDLER global_handler = NULL;
|
|
void *global_context = NULL;
|
|
ACPI_OPERAND_OBJECT *handler_obj;
|
|
|
|
|
|
/*
|
|
* We will invoke a global notify handler if installed.
|
|
* This is done _before_ we invoke the per-device handler attached to the device.
|
|
*/
|
|
|
|
if (notify_info->notify.value <= MAX_SYS_NOTIFY) {
|
|
/* Global system notification handler */
|
|
|
|
if (acpi_gbl_sys_notify.handler) {
|
|
global_handler = acpi_gbl_sys_notify.handler;
|
|
global_context = acpi_gbl_sys_notify.context;
|
|
}
|
|
}
|
|
|
|
else {
|
|
/* Global driver notification handler */
|
|
|
|
if (acpi_gbl_drv_notify.handler) {
|
|
global_handler = acpi_gbl_drv_notify.handler;
|
|
global_context = acpi_gbl_drv_notify.context;
|
|
}
|
|
}
|
|
|
|
|
|
/* Invoke the system handler first, if present */
|
|
|
|
if (global_handler) {
|
|
global_handler (notify_info->notify.node, notify_info->notify.value, global_context);
|
|
}
|
|
|
|
/* Now invoke the per-device handler, if present */
|
|
|
|
handler_obj = notify_info->notify.handler_obj;
|
|
if (handler_obj) {
|
|
handler_obj->notify_handler.handler (notify_info->notify.node, notify_info->notify.value,
|
|
handler_obj->notify_handler.context);
|
|
}
|
|
|
|
|
|
/* All done with the info object */
|
|
|
|
acpi_cm_delete_generic_state (notify_info);
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_global_lock_thread
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Invoked by SCI interrupt handler upon acquisition of the
|
|
* Global Lock. Simply signal all threads that are waiting
|
|
* for the lock.
|
|
*
|
|
**************************************************************************/
|
|
|
|
static void
|
|
acpi_ev_global_lock_thread (
|
|
void *context)
|
|
{
|
|
|
|
/* Signal threads that are waiting for the lock */
|
|
|
|
if (acpi_gbl_global_lock_thread_count) {
|
|
/* Send sufficient units to the semaphore */
|
|
|
|
acpi_os_signal_semaphore (acpi_gbl_global_lock_semaphore,
|
|
acpi_gbl_global_lock_thread_count);
|
|
}
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_global_lock_handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Invoked directly from the SCI handler when a global lock
|
|
* release interrupt occurs. Grab the global lock and queue
|
|
* the global lock thread for execution
|
|
*
|
|
**************************************************************************/
|
|
|
|
static u32
|
|
acpi_ev_global_lock_handler (
|
|
void *context)
|
|
{
|
|
u8 acquired = FALSE;
|
|
void *global_lock;
|
|
|
|
|
|
/*
|
|
* Attempt to get the lock
|
|
* If we don't get it now, it will be marked pending and we will
|
|
* take another interrupt when it becomes free.
|
|
*/
|
|
|
|
global_lock = acpi_gbl_FACS->global_lock;
|
|
ACPI_ACQUIRE_GLOBAL_LOCK (global_lock, acquired);
|
|
if (acquired) {
|
|
/* Got the lock, now wake all threads waiting for it */
|
|
|
|
acpi_gbl_global_lock_acquired = TRUE;
|
|
|
|
/* Run the Global Lock thread which will signal all waiting threads */
|
|
|
|
acpi_os_queue_for_execution (OSD_PRIORITY_HIGH, acpi_ev_global_lock_thread,
|
|
context);
|
|
}
|
|
|
|
return (INTERRUPT_HANDLED);
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_init_global_lock_handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for the global lock release event
|
|
*
|
|
**************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
acpi_ev_init_global_lock_handler (void)
|
|
{
|
|
ACPI_STATUS status;
|
|
|
|
|
|
acpi_gbl_global_lock_present = TRUE;
|
|
status = acpi_install_fixed_event_handler (ACPI_EVENT_GLOBAL,
|
|
acpi_ev_global_lock_handler, NULL);
|
|
|
|
/*
|
|
* If the global lock does not exist on this platform, the attempt
|
|
* to enable GBL_STS will fail (the GBL_EN bit will not stick)
|
|
* Map to AE_OK, but mark global lock as not present.
|
|
* Any attempt to actually use the global lock will be flagged
|
|
* with an error.
|
|
*/
|
|
if (status == AE_NO_HARDWARE_RESPONSE) {
|
|
acpi_gbl_global_lock_present = FALSE;
|
|
status = AE_OK;
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_acquire_global_lock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Attempt to gain ownership of the Global Lock.
|
|
*
|
|
**************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
acpi_ev_acquire_global_lock(void)
|
|
{
|
|
ACPI_STATUS status = AE_OK;
|
|
u8 acquired = FALSE;
|
|
void *global_lock;
|
|
|
|
|
|
/* Make sure that we actually have a global lock */
|
|
|
|
if (!acpi_gbl_global_lock_present) {
|
|
return (AE_NO_GLOBAL_LOCK);
|
|
}
|
|
|
|
/* One more thread wants the global lock */
|
|
|
|
acpi_gbl_global_lock_thread_count++;
|
|
|
|
|
|
/* If we (OS side) have the hardware lock already, we are done */
|
|
|
|
if (acpi_gbl_global_lock_acquired) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Only if the FACS is valid */
|
|
|
|
if (!acpi_gbl_FACS) {
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/* We must acquire the actual hardware lock */
|
|
|
|
global_lock = acpi_gbl_FACS->global_lock;
|
|
ACPI_ACQUIRE_GLOBAL_LOCK (global_lock, acquired);
|
|
if (acquired) {
|
|
/* We got the lock */
|
|
|
|
acpi_gbl_global_lock_acquired = TRUE;
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*
|
|
* Did not get the lock. The pending bit was set above, and we must now
|
|
* wait until we get the global lock released interrupt.
|
|
*/
|
|
|
|
/*
|
|
* Acquire the global lock semaphore first.
|
|
* Since this wait will block, we must release the interpreter
|
|
*/
|
|
|
|
status = acpi_aml_system_wait_semaphore (acpi_gbl_global_lock_semaphore,
|
|
ACPI_UINT32_MAX);
|
|
|
|
return (status);
|
|
}
|
|
|
|
|
|
/***************************************************************************
|
|
*
|
|
* FUNCTION: Acpi_ev_release_global_lock
|
|
*
|
|
* DESCRIPTION: Releases ownership of the Global Lock.
|
|
*
|
|
**************************************************************************/
|
|
|
|
void
|
|
acpi_ev_release_global_lock (void)
|
|
{
|
|
u8 pending = FALSE;
|
|
void *global_lock;
|
|
|
|
|
|
if (!acpi_gbl_global_lock_thread_count) {
|
|
REPORT_WARNING(("Global Lock has not be acquired, cannot release\n"));
|
|
return;
|
|
}
|
|
|
|
/* One fewer thread has the global lock */
|
|
|
|
acpi_gbl_global_lock_thread_count--;
|
|
|
|
/* Have all threads released the lock? */
|
|
|
|
if (!acpi_gbl_global_lock_thread_count) {
|
|
/*
|
|
* No more threads holding lock, we can do the actual hardware
|
|
* release
|
|
*/
|
|
|
|
global_lock = acpi_gbl_FACS->global_lock;
|
|
ACPI_RELEASE_GLOBAL_LOCK (global_lock, pending);
|
|
acpi_gbl_global_lock_acquired = FALSE;
|
|
|
|
/*
|
|
* If the pending bit was set, we must write GBL_RLS to the control
|
|
* register
|
|
*/
|
|
if (pending) {
|
|
acpi_hw_register_bit_access (ACPI_WRITE, ACPI_MTX_LOCK,
|
|
GBL_RLS, 1);
|
|
}
|
|
}
|
|
|
|
return;
|
|
}
|