ACPICA: Update for mutiple global lock acquisitions by same thread

Allows AcpiAcquireGlobalLock external interface to be called
multiple times by the
 same thread. Allows use of AML fields that require the global
 lock while the running AML is already holding the global lock.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

3 files changed, 23 insertions, 11 deletions

diff --git a/include/acpi/acglobal.h b/include/acpi/acglobal.h
index 47a1fd8f2d8..e91008eaef2 100644
--- a/include/acpi/acglobal.h
+++ b/include/acpi/acglobal.h
@@ -170,10 +170,14 @@ ACPI_EXTERN u8 acpi_gbl_integer_nybble_width;
 ACPI_EXTERN struct acpi_mutex_info acpi_gbl_mutex_info[ACPI_NUM_MUTEX];
 
 /*
- * Global lock semaphore works in conjunction with the actual HW global lock
+ * Global lock mutex is an actual AML mutex object
+ * Global lock semaphore works in conjunction with the HW global lock
  */
-ACPI_EXTERN acpi_mutex acpi_gbl_global_lock_mutex;
+ACPI_EXTERN union acpi_operand_object *acpi_gbl_global_lock_mutex;
 ACPI_EXTERN acpi_semaphore acpi_gbl_global_lock_semaphore;
+ACPI_EXTERN u16 acpi_gbl_global_lock_handle;
+ACPI_EXTERN u8 acpi_gbl_global_lock_acquired;
+ACPI_EXTERN u8 acpi_gbl_global_lock_present;
 
 /*
  * Spinlocks are used for interfaces that can be possibly called at
@@ -215,22 +219,22 @@ ACPI_EXTERN acpi_exception_handler acpi_gbl_exception_handler;
 ACPI_EXTERN acpi_init_handler acpi_gbl_init_handler;
 ACPI_EXTERN struct acpi_walk_state *acpi_gbl_breakpoint_walk;
 
+/* Owner ID support */
+
+ACPI_EXTERN u32 acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS];
+ACPI_EXTERN u8 acpi_gbl_last_owner_id_index;
+ACPI_EXTERN u8 acpi_gbl_next_owner_id_offset;
+
 /* Misc */
 
 ACPI_EXTERN u32 acpi_gbl_original_mode;
 ACPI_EXTERN u32 acpi_gbl_rsdp_original_location;
 ACPI_EXTERN u32 acpi_gbl_ns_lookup_count;
 ACPI_EXTERN u32 acpi_gbl_ps_find_count;
-ACPI_EXTERN u32 acpi_gbl_owner_id_mask[ACPI_NUM_OWNERID_MASKS];
 ACPI_EXTERN u16 acpi_gbl_pm1_enable_register_save;
-ACPI_EXTERN u16 acpi_gbl_global_lock_handle;
-ACPI_EXTERN u8 acpi_gbl_last_owner_id_index;
-ACPI_EXTERN u8 acpi_gbl_next_owner_id_offset;
 ACPI_EXTERN u8 acpi_gbl_debugger_configuration;
-ACPI_EXTERN u8 acpi_gbl_global_lock_acquired;
 ACPI_EXTERN u8 acpi_gbl_step_to_next_call;
 ACPI_EXTERN u8 acpi_gbl_acpi_hardware_present;
-ACPI_EXTERN u8 acpi_gbl_global_lock_present;
 ACPI_EXTERN u8 acpi_gbl_events_initialized;
 ACPI_EXTERN u8 acpi_gbl_system_awake_and_running;
 
diff --git a/include/acpi/acinterp.h b/include/acpi/acinterp.h
index ce7c9d65391..23863886e80 100644
--- a/include/acpi/acinterp.h
+++ b/include/acpi/acinterp.h
@@ -248,9 +248,16 @@ acpi_ex_acquire_mutex(union acpi_operand_object *time_desc,
 		      struct acpi_walk_state *walk_state);
 
 acpi_status
+acpi_ex_acquire_mutex_object(u16 timeout,
+			     union acpi_operand_object *obj_desc,
+			     acpi_thread_id thread_id);
+
+acpi_status
 acpi_ex_release_mutex(union acpi_operand_object *obj_desc,
 		      struct acpi_walk_state *walk_state);
 
+acpi_status acpi_ex_release_mutex_object(union acpi_operand_object *obj_desc);
+
 void acpi_ex_release_all_mutexes(struct acpi_thread_state *thread);
 
 void acpi_ex_unlink_mutex(union acpi_operand_object *obj_desc);
@@ -455,9 +462,9 @@ void acpi_ex_relinquish_interpreter(void);
 
 void acpi_ex_truncate_for32bit_table(union acpi_operand_object *obj_desc);
 
-u8 acpi_ex_acquire_global_lock(u32 rule);
+void acpi_ex_acquire_global_lock(u32 rule);
 
-void acpi_ex_release_global_lock(u8 locked);
+void acpi_ex_release_global_lock(void);
 
 void acpi_ex_eisa_id_to_string(u32 numeric_id, char *out_string);
 
diff --git a/include/acpi/acobject.h b/include/acpi/acobject.h
index 7e1211a8b8f..2461bb9ab3e 100644
--- a/include/acpi/acobject.h
+++ b/include/acpi/acobject.h
@@ -155,8 +155,9 @@ struct acpi_object_event {
 struct acpi_object_mutex {
 	ACPI_OBJECT_COMMON_HEADER u8 sync_level;	/* 0-15, specified in Mutex() call */
 	u16 acquisition_depth;	/* Allow multiple Acquires, same thread */
-	struct acpi_thread_state *owner_thread;	/* Current owner of the mutex */
 	acpi_mutex os_mutex;	/* Actual OS synchronization object */
+	acpi_thread_id thread_id;	/* Current owner of the mutex */
+	struct acpi_thread_state *owner_thread;	/* Current owner of the mutex */
 	union acpi_operand_object *prev;	/* Link for list of acquired mutexes */
 	union acpi_operand_object *next;	/* Link for list of acquired mutexes */
 	struct acpi_namespace_node *node;	/* Containing namespace node */