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Lines 6-12
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* Copyright (C) 2000 - 2019, Intel Corp. |
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* Copyright (C) 2000 - 2019, Intel Corp. |
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* |
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* |
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*****************************************************************************/ |
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*****************************************************************************/ |
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#include <linux/moduleparam.h> |
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#include <acpi/acpi.h> |
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "accommon.h" |
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#include "acevents.h" |
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#include "acevents.h" |
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Lines 166-178
static u32 acpi_ev_global_lock_handler(void *context)
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* the global lock appear as a standard mutex on the OS side. |
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* the global lock appear as a standard mutex on the OS side. |
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* |
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* |
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*****************************************************************************/ |
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*****************************************************************************/ |
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static unsigned long lktry,lksuccess,lkfail,lkpending; |
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acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
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acpi_status acpi_ev_acquire_global_lock(u16 timeout) |
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{ |
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{ |
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acpi_cpu_flags flags; |
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acpi_cpu_flags flags; |
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acpi_status status; |
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acpi_status status; |
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u8 acquired = FALSE; |
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u8 acquired = FALSE; |
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unsigned long lkspin=0; |
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ACPI_FUNCTION_TRACE(ev_acquire_global_lock); |
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ACPI_FUNCTION_TRACE(ev_acquire_global_lock); |
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/* |
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/* |
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Lines 209-215
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
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} |
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} |
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flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); |
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flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); |
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ACPI_ERROR((AE_INFO,"the %zu'th grab\n", ++lktry)); |
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do { |
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do { |
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/* Attempt to acquire the actual hardware lock */ |
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/* Attempt to acquire the actual hardware lock */ |
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Lines 219-225
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
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acpi_gbl_global_lock_acquired = TRUE; |
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acpi_gbl_global_lock_acquired = TRUE; |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Acquired hardware Global Lock\n")); |
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"Acquired hardware Global Lock\n")); |
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break; |
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++lksuccess;break; |
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} |
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} |
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/* |
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/* |
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Lines 239-246
acpi_status acpi_ev_acquire_global_lock(u16 timeout)
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*/ |
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*/ |
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status = |
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status = |
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acpi_ex_system_wait_semaphore |
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acpi_ex_system_wait_semaphore |
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(acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER); |
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(acpi_gbl_global_lock_semaphore, 44); |
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if(status==AE_TIME){status=AE_OK;ACPI_ERROR((AE_INFO,"..sema not posted after %zux44ms",++lkspin));if(lkspin>=2){acpi_gbl_global_lock_acquired=1;++lkfail;++lkpending;break;}} |
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flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); |
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flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); |
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} while (ACPI_SUCCESS(status)); |
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} while (ACPI_SUCCESS(status)); |
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Lines 281-287
acpi_status acpi_ev_release_global_lock(void)
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if (acpi_gbl_global_lock_present) { |
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if (acpi_gbl_global_lock_present) { |
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/* Allow any thread to release the lock */ |
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/* Allow any thread to release the lock */ |
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if(lkpending==0){ |
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ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending); |
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ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending); |
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/* |
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/* |
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Lines 294-300
acpi_status acpi_ev_release_global_lock(void)
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(ACPI_BITREG_GLOBAL_LOCK_RELEASE, |
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(ACPI_BITREG_GLOBAL_LOCK_RELEASE, |
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ACPI_ENABLE_EVENT); |
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ACPI_ENABLE_EVENT); |
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} |
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} |
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}else{--lkpending;status=AE_OK;} |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Released hardware Global Lock\n")); |
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"Released hardware Global Lock\n")); |
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} |
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} |
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Lines 306-310
acpi_status acpi_ev_release_global_lock(void)
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acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex); |
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acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex); |
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return_ACPI_STATUS(status); |
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return_ACPI_STATUS(status); |
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} |
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} |
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module_param(lktry,ulong,0444);module_param(lkfail,ulong,0444);module_param(lksuccess,ulong,0444); |
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#endif /* !ACPI_REDUCED_HARDWARE */ |
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#endif /* !ACPI_REDUCED_HARDWARE */ |