Release 4.11 drivers/acpi/acpica/exsystem.c
/******************************************************************************
*
* Module Name: exsystem - Interface to OS services
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2017, 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 <acpi/acpi.h>
#include "accommon.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exsystem")
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_wait_semaphore
*
* PARAMETERS: semaphore - Semaphore to wait on
* timeout - Max time to wait
*
* RETURN: Status
*
* DESCRIPTION: Implements a semaphore wait with a check to see if the
* semaphore is available immediately. If it is not, the
* interpreter is released before waiting.
*
******************************************************************************/
acpi_status acpi_ex_system_wait_semaphore(acpi_semaphore semaphore, u16 timeout)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ex_system_wait_semaphore);
status = acpi_os_wait_semaphore(semaphore, 1, ACPI_DO_NOT_WAIT);
if (ACPI_SUCCESS(status)) {
return_ACPI_STATUS(status);
}
if (status == AE_TIME) {
/* We must wait, so unlock the interpreter */
acpi_ex_exit_interpreter();
status = acpi_os_wait_semaphore(semaphore, 1, timeout);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"*** Thread awake after blocking, %s\n",
acpi_format_exception(status)));
/* Reacquire the interpreter */
acpi_ex_enter_interpreter();
}
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 55 | 61.11% | 1 | 11.11% |
| Linus Torvalds | 27 | 30.00% | 2 | 22.22% |
| Robert Moore | 3 | 3.33% | 2 | 22.22% |
| Lv Zheng | 2 | 2.22% | 1 | 11.11% |
| Andy Grover | 2 | 2.22% | 2 | 22.22% |
| Len Brown | 1 | 1.11% | 1 | 11.11% |
| Total | 90 | 100.00% | 9 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_wait_mutex
*
* PARAMETERS: mutex - Mutex to wait on
* timeout - Max time to wait
*
* RETURN: Status
*
* DESCRIPTION: Implements a mutex wait with a check to see if the
* mutex is available immediately. If it is not, the
* interpreter is released before waiting.
*
******************************************************************************/
acpi_status acpi_ex_system_wait_mutex(acpi_mutex mutex, u16 timeout)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ex_system_wait_mutex);
status = acpi_os_acquire_mutex(mutex, ACPI_DO_NOT_WAIT);
if (ACPI_SUCCESS(status)) {
return_ACPI_STATUS(status);
}
if (status == AE_TIME) {
/* We must wait, so unlock the interpreter */
acpi_ex_exit_interpreter();
status = acpi_os_acquire_mutex(mutex, timeout);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"*** Thread awake after blocking, %s\n",
acpi_format_exception(status)));
/* Reacquire the interpreter */
acpi_ex_enter_interpreter();
}
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Robert Moore | 84 | 97.67% | 1 | 50.00% |
| Lv Zheng | 2 | 2.33% | 1 | 50.00% |
| Total | 86 | 100.00% | 2 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_do_stall
*
* PARAMETERS: how_long - The amount of time to stall,
* in microseconds
*
* RETURN: Status
*
* DESCRIPTION: Suspend running thread for specified amount of time.
* Note: ACPI specification requires that Stall() does not
* relinquish the processor, and delays longer than 100 usec
* should use Sleep() instead. We allow stalls up to 255 usec
* for compatibility with other interpreters and existing BIOSs.
*
******************************************************************************/
acpi_status acpi_ex_system_do_stall(u32 how_long)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_ENTRY();
if (how_long > 255) { /* 255 microseconds */
/*
* Longer than 255 usec, this is an error
*
* (ACPI specifies 100 usec as max, but this gives some slack in
* order to support existing BIOSs)
*/
ACPI_ERROR((AE_INFO,
"Time parameter is too large (%u)", how_long));
status = AE_AML_OPERAND_VALUE;
} else {
acpi_os_stall(how_long);
}
return (status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 24 | 44.44% | 1 | 11.11% |
| Andy Grover | 14 | 25.93% | 2 | 22.22% |
| Len Brown | 9 | 16.67% | 2 | 22.22% |
| Robert Moore | 4 | 7.41% | 2 | 22.22% |
| Linus Torvalds | 3 | 5.56% | 2 | 22.22% |
| Total | 54 | 100.00% | 9 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_do_sleep
*
* PARAMETERS: how_long - The amount of time to sleep,
* in milliseconds
*
* RETURN: None
*
* DESCRIPTION: Sleep the running thread for specified amount of time.
*
******************************************************************************/
acpi_status acpi_ex_system_do_sleep(u64 how_long)
{
ACPI_FUNCTION_ENTRY();
/* Since this thread will sleep, we must release the interpreter */
acpi_ex_exit_interpreter();
/*
* For compatibility with other ACPI implementations and to prevent
* accidental deep sleeps, limit the sleep time to something reasonable.
*/
if (how_long > ACPI_MAX_SLEEP) {
how_long = ACPI_MAX_SLEEP;
}
acpi_os_sleep(how_long);
/* And now we must get the interpreter again */
acpi_ex_enter_interpreter();
return (AE_OK);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 16 | 38.10% | 1 | 11.11% |
| Robert Moore | 15 | 35.71% | 3 | 33.33% |
| Andy Grover | 5 | 11.90% | 1 | 11.11% |
| Linus Torvalds | 2 | 4.76% | 1 | 11.11% |
| Len Brown | 2 | 4.76% | 2 | 22.22% |
| Lv Zheng | 2 | 4.76% | 1 | 11.11% |
| Total | 42 | 100.00% | 9 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_signal_event
*
* PARAMETERS: obj_desc - The object descriptor for this op
*
* RETURN: Status
*
* DESCRIPTION: Provides an access point to perform synchronization operations
* within the AML.
*
******************************************************************************/
acpi_status acpi_ex_system_signal_event(union acpi_operand_object * obj_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(ex_system_signal_event);
if (obj_desc) {
status =
acpi_os_signal_semaphore(obj_desc->event.os_semaphore, 1);
}
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 29 | 65.91% | 1 | 12.50% |
| Linus Torvalds | 10 | 22.73% | 2 | 25.00% |
| Andy Grover | 2 | 4.55% | 2 | 25.00% |
| Robert Moore | 2 | 4.55% | 2 | 25.00% |
| Len Brown | 1 | 2.27% | 1 | 12.50% |
| Total | 44 | 100.00% | 8 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_wait_event
*
* PARAMETERS: time_desc - The 'time to delay' object descriptor
* obj_desc - The object descriptor for this op
*
* RETURN: Status
*
* DESCRIPTION: Provides an access point to perform synchronization operations
* within the AML. This operation is a request to wait for an
* event.
*
******************************************************************************/
acpi_status
acpi_ex_system_wait_event(union acpi_operand_object *time_desc,
union acpi_operand_object *obj_desc)
{
acpi_status status = AE_OK;
ACPI_FUNCTION_TRACE(ex_system_wait_event);
if (obj_desc) {
status =
acpi_ex_system_wait_semaphore(obj_desc->event.os_semaphore,
(u16) time_desc->integer.
value);
}
return_ACPI_STATUS(status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 36 | 64.29% | 2 | 20.00% |
| Linus Torvalds | 14 | 25.00% | 3 | 30.00% |
| Andy Grover | 4 | 7.14% | 3 | 30.00% |
| Robert Moore | 2 | 3.57% | 2 | 20.00% |
| Total | 56 | 100.00% | 10 | 100.00% |
/*******************************************************************************
*
* FUNCTION: acpi_ex_system_reset_event
*
* PARAMETERS: obj_desc - The object descriptor for this op
*
* RETURN: Status
*
* DESCRIPTION: Reset an event to a known state.
*
******************************************************************************/
acpi_status acpi_ex_system_reset_event(union acpi_operand_object *obj_desc)
{
acpi_status status = AE_OK;
acpi_semaphore temp_semaphore;
ACPI_FUNCTION_ENTRY();
/*
* We are going to simply delete the existing semaphore and
* create a new one!
*/
status =
acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0, &temp_semaphore);
if (ACPI_SUCCESS(status)) {
(void)acpi_os_delete_semaphore(obj_desc->event.os_semaphore);
obj_desc->event.os_semaphore = temp_semaphore;
}
return (status);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 52 | 76.47% | 1 | 12.50% |
| Linus Torvalds | 7 | 10.29% | 2 | 25.00% |
| Andy Grover | 5 | 7.35% | 3 | 37.50% |
| Robert Moore | 3 | 4.41% | 1 | 12.50% |
| Len Brown | 1 | 1.47% | 1 | 12.50% |
| Total | 68 | 100.00% | 8 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Linus Torvalds (pre-git) | 221 | 47.42% | 2 | 7.14% |
| Robert Moore | 123 | 26.39% | 11 | 39.29% |
| Linus Torvalds | 65 | 13.95% | 3 | 10.71% |
| Andy Grover | 34 | 7.30% | 6 | 21.43% |
| Len Brown | 16 | 3.43% | 4 | 14.29% |
| Lv Zheng | 6 | 1.29% | 1 | 3.57% |
| Patrick Mochel | 1 | 0.21% | 1 | 3.57% |
| Total | 466 | 100.00% | 28 | 100.00% |
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