ACPICA: Split all internal Global Lock functions to new file - evglock

These functions were moved from evmisc.c

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 0 insertions, 309 deletions

diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c
index 69a3b4aa862..d0b33184442 100644
--- a/drivers/acpi/acpica/evmisc.c
+++ b/drivers/acpi/acpica/evmisc.c
@@ -45,7 +45,6 @@
 #include "accommon.h"
 #include "acevents.h"
 #include "acnamesp.h"
-#include "acinterp.h"
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evmisc")
@@ -53,10 +52,6 @@ ACPI_MODULE_NAME("evmisc")
 /* Local prototypes */
 static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context);
 
-static u32 acpi_ev_global_lock_handler(void *context);
-
-static acpi_status acpi_ev_remove_global_lock_handler(void);
-
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ev_is_notify_object
@@ -275,310 +270,6 @@ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)
 	acpi_ut_delete_generic_state(notify_info);
 }
 
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_global_lock_handler
- *
- * PARAMETERS:  Context         - From thread interface, not used
- *
- * RETURN:      ACPI_INTERRUPT_HANDLED
- *
- * DESCRIPTION: Invoked directly from the SCI handler when a global lock
- *              release interrupt occurs. If there is actually a pending
- *              request for the lock, signal the waiting thread.
- *
- ******************************************************************************/
-
-static u32 acpi_ev_global_lock_handler(void *context)
-{
-	acpi_status status;
-	acpi_cpu_flags flags;
-
-	flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
-
-	/*
-	 * If a request for the global lock is not actually pending,
-	 * we are done. This handles "spurious" global lock interrupts
-	 * which are possible (and have been seen) with bad BIOSs.
-	 */
-	if (!acpi_gbl_global_lock_pending) {
-		goto cleanup_and_exit;
-	}
-
-	/*
-	 * Send a unit to the global lock semaphore. The actual acquisition
-	 * of the global lock will be performed by the waiting thread.
-	 */
-	status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1);
-	if (ACPI_FAILURE(status)) {
-		ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore"));
-	}
-
-	acpi_gbl_global_lock_pending = FALSE;
-
-cleanup_and_exit:
-
-	acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
-	return (ACPI_INTERRUPT_HANDLED);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_init_global_lock_handler
- *
- * PARAMETERS:  None
- *
- * 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_FUNCTION_TRACE(ev_init_global_lock_handler);
-
-	/* Attempt installation of the global lock handler */
-
-	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_STATUS will fail (the GBL_ENABLE 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.
-	 */
-	acpi_gbl_global_lock_present = FALSE;
-	if (status == AE_NO_HARDWARE_RESPONSE) {
-		ACPI_ERROR((AE_INFO,
-			    "No response from Global Lock hardware, disabling lock"));
-
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock);
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	acpi_gbl_global_lock_pending = FALSE;
-	acpi_gbl_global_lock_present = TRUE;
-	return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_remove_global_lock_handler
- *
- * PARAMETERS:  None
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Remove the handler for the Global Lock
- *
- ******************************************************************************/
-
-static acpi_status acpi_ev_remove_global_lock_handler(void)
-{
-	acpi_status status;
-
-	ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler);
-
-	acpi_gbl_global_lock_present = FALSE;
-	status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL,
-						 acpi_ev_global_lock_handler);
-
-	return_ACPI_STATUS(status);
-}
-
-/******************************************************************************
- *
- * FUNCTION:    acpi_ev_acquire_global_lock
- *
- * PARAMETERS:  Timeout         - Max time to wait for the lock, in millisec.
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Attempt to gain ownership of the Global Lock.
- *
- * MUTEX:       Interpreter must be locked
- *
- * Note: The original implementation allowed multiple threads to "acquire" the
- * Global Lock, and the OS would hold the lock until the last thread had
- * released it. However, this could potentially starve the BIOS out of the
- * lock, especially in the case where there is a tight handshake between the
- * Embedded Controller driver and the BIOS. Therefore, this implementation
- * allows only one thread to acquire the HW Global Lock at a time, and makes
- * the global lock appear as a standard mutex on the OS side.
- *
- *****************************************************************************/
-static acpi_thread_id acpi_ev_global_lock_thread_id;
-static int acpi_ev_global_lock_acquired;
-
-acpi_status acpi_ev_acquire_global_lock(u16 timeout)
-{
-	acpi_cpu_flags flags;
-	acpi_status status;
-	u8 acquired = FALSE;
-
-	ACPI_FUNCTION_TRACE(ev_acquire_global_lock);
-
-	/*
-	 * Only one thread can acquire the GL at a time, the global_lock_mutex
-	 * enforces this. This interface releases the interpreter if we must wait.
-	 */
-	status = acpi_ex_system_wait_mutex(
-			acpi_gbl_global_lock_mutex->mutex.os_mutex, 0);
-	if (status == AE_TIME) {
-		if (acpi_ev_global_lock_thread_id == acpi_os_get_thread_id()) {
-			acpi_ev_global_lock_acquired++;
-			return AE_OK;
-		}
-	}
-
-	if (ACPI_FAILURE(status)) {
-		status = acpi_ex_system_wait_mutex(
-				acpi_gbl_global_lock_mutex->mutex.os_mutex,
-				timeout);
-	}
-	if (ACPI_FAILURE(status)) {
-		return_ACPI_STATUS(status);
-	}
-
-	acpi_ev_global_lock_thread_id = acpi_os_get_thread_id();
-	acpi_ev_global_lock_acquired++;
-
-	/*
-	 * Update the global lock handle and check for wraparound. The handle is
-	 * only used for the external global lock interfaces, but it is updated
-	 * here to properly handle the case where a single thread may acquire the
-	 * lock via both the AML and the acpi_acquire_global_lock interfaces. The
-	 * handle is therefore updated on the first acquire from a given thread
-	 * regardless of where the acquisition request originated.
-	 */
-	acpi_gbl_global_lock_handle++;
-	if (acpi_gbl_global_lock_handle == 0) {
-		acpi_gbl_global_lock_handle = 1;
-	}
-
-	/*
-	 * Make sure that a global lock actually exists. If not, just
-	 * treat the lock as a standard mutex.
-	 */
-	if (!acpi_gbl_global_lock_present) {
-		acpi_gbl_global_lock_acquired = TRUE;
-		return_ACPI_STATUS(AE_OK);
-	}
-
-	flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
-
-	do {
-
-		/* Attempt to acquire the actual hardware lock */
-
-		ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired);
-		if (acquired) {
-			acpi_gbl_global_lock_acquired = TRUE;
-			ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
-					  "Acquired hardware Global Lock\n"));
-			break;
-		}
-
-		/*
-		 * Did not get the lock. The pending bit was set above, and
-		 * we must now wait until we receive the global lock
-		 * released interrupt.
-		 */
-		acpi_gbl_global_lock_pending = TRUE;
-		acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
-
-		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
-				  "Waiting for hardware Global Lock\n"));
-
-		/*
-		 * Wait for handshake with the global lock interrupt handler.
-		 * This interface releases the interpreter if we must wait.
-		 */
-		status =
-		    acpi_ex_system_wait_semaphore
-		    (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER);
-
-		flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock);
-
-	} while (ACPI_SUCCESS(status));
-
-	acpi_gbl_global_lock_pending = FALSE;
-	acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags);
-
-	return_ACPI_STATUS(status);
-}
-
-/*******************************************************************************
- *
- * FUNCTION:    acpi_ev_release_global_lock
- *
- * PARAMETERS:  None
- *
- * RETURN:      Status
- *
- * DESCRIPTION: Releases ownership of the Global Lock.
- *
- ******************************************************************************/
-
-acpi_status acpi_ev_release_global_lock(void)
-{
-	u8 pending = FALSE;
-	acpi_status status = AE_OK;
-
-	ACPI_FUNCTION_TRACE(ev_release_global_lock);
-
-	/* Lock must be already acquired */
-
-	if (!acpi_gbl_global_lock_acquired) {
-		ACPI_WARNING((AE_INFO,
-			      "Cannot release the ACPI Global Lock, it has not been acquired"));
-		return_ACPI_STATUS(AE_NOT_ACQUIRED);
-	}
-
-	acpi_ev_global_lock_acquired--;
-	if (acpi_ev_global_lock_acquired > 0) {
-		return AE_OK;
-	}
-
-	if (acpi_gbl_global_lock_present) {
-
-		/* Allow any thread to release the lock */
-
-		ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending);
-
-		/*
-		 * If the pending bit was set, we must write GBL_RLS to the control
-		 * register
-		 */
-		if (pending) {
-			status =
-			    acpi_write_bit_register
-			    (ACPI_BITREG_GLOBAL_LOCK_RELEASE,
-			     ACPI_ENABLE_EVENT);
-		}
-
-		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
-				  "Released hardware Global Lock\n"));
-	}
-
-	acpi_gbl_global_lock_acquired = FALSE;
-
-	/* Release the local GL mutex */
-	acpi_ev_global_lock_thread_id = 0;
-	acpi_ev_global_lock_acquired = 0;
-	acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex);
-	return_ACPI_STATUS(status);
-}
-
 /******************************************************************************
  *
  * FUNCTION:    acpi_ev_terminate