isci: uplevel state machine

unify core/sci_base_state.h and core/sci_base_state_machine.[ch] into
state_machine.[ch]

Reported-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/scsi/isci/Makefile

@@ -3,6 +3,7 @@ obj-$(CONFIG_SCSI_ISCI) += isci.o
 isci-objs := init.o phy.o request.o sata.o \
 	     remote_device.o port.o timers.o \
 	     host.o task.o probe_roms.o \
+	     state_machine.o \
 	     remote_node_context.o \
 	     remote_node_table.o \
 	     unsolicited_frame_control.o \
@@ -13,5 +14,4 @@ isci-objs := init.o phy.o request.o sata.o \
 	     core/scic_sds_phy.o \
 	     core/scic_sds_ssp_request.o \
 	     core/scic_sds_smp_request.o \
-	     core/sci_base_state_machine.o \
 	     core/sci_util.o

drivers/scsi/isci/core/scic_sds_phy.c

@@ -56,8 +56,7 @@
 #include <scsi/sas.h>
 #include "sas.h"
 #include "host.h"
-#include "sci_base_state.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "scic_phy.h"
 #include "scic_sds_phy.h"
 #include "scic_sds_port.h"

drivers/scsi/isci/core/scic_sds_phy.h

@@ -59,7 +59,7 @@
 #include "sas.h"
 #include "scic_phy.h"
 #include "registers.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include <scsi/libsas.h>
 
 struct scic_sds_port;

drivers/scsi/isci/core/scic_sds_port.h

@@ -60,7 +60,7 @@
 #include "isci.h"
 #include "sas.h"
 #include "registers.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 
 struct scic_sds_controller;
 struct scic_sds_phy;

drivers/scsi/isci/core/scic_sds_request.h

@@ -58,7 +58,7 @@
 
 #include "isci.h"
 #include "scic_io_request.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "scu_task_context.h"
 #include "scic_sds_stp_request.h"
 #include "sas.h"

drivers/scsi/isci/core/scic_sds_smp_request.c

@@ -54,7 +54,7 @@
  */
 
 #include <scsi/sas.h>
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "remote_device.h"
 #include "scic_sds_request.h"
 #include "scic_sds_smp_request.h"

drivers/scsi/isci/core/scic_sds_ssp_request.c

@@ -54,7 +54,7 @@
  */
 
 #include "host.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "scic_sds_request.h"
 #include "scu_completion_codes.h"
 #include "scu_task_context.h"

drivers/scsi/isci/core/scic_sds_stp_pio_request.h

@@ -56,7 +56,6 @@
 #ifndef _SCIC_SDS_SATA_PIO_REQUEST_H_
 #define _SCIC_SDS_SATA_PIO_REQUEST_H_
 
-#include "sci_base_state.h"
 #include "scic_sds_request.h"
 #include "scu_task_context.h"
 

drivers/scsi/isci/core/scic_sds_stp_request.c

@@ -55,8 +55,7 @@
 
 #include <scsi/sas.h>
 #include "sas.h"
-#include "sci_base_state.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "scic_io_request.h"
 #include "remote_device.h"
 #include "scic_sds_request.h"

drivers/scsi/isci/host.h

@@ -59,7 +59,7 @@
 #include "remote_device.h"
 #include "phy.h"
 #include "pool.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "remote_node_table.h"
 #include "registers.h"
 #include "scu_unsolicited_frame.h"

drivers/scsi/isci/remote_node_context.c

@@ -54,7 +54,7 @@
  */
 
 #include "host.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 #include "scic_sds_port.h"
 #include "remote_device.h"
 #include "remote_node_context.h"

drivers/scsi/isci/remote_node_context.h

@@ -64,8 +64,7 @@
  *
  */
 
-#include "sci_base_state.h"
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 
 /**
  *

drivers/scsi/isci/core/sci_base_state_machine.c → drivers/scsi/isci/state_machine.c

@@ -60,7 +60,7 @@
  *
  */
 
-#include "sci_base_state_machine.h"
+#include "state_machine.h"
 
 static void sci_state_machine_exit_state(struct sci_base_state_machine *sm)
 {
@@ -121,9 +121,6 @@ void sci_base_state_machine_construct(struct sci_base_state_machine *sm,
 void sci_base_state_machine_start(struct sci_base_state_machine *sm)
 {
 	sm->current_state_id = sm->initial_state_id;
-#if defined(SCI_BASE_ENABLE_SUBJECT_NOTIFICATION)
-	sci_base_subject_notify(&sm->parent);
-#endif
 	sci_state_machine_enter_state(sm);
 }
 
@@ -137,9 +134,6 @@ void sci_base_state_machine_stop(
 	struct sci_base_state_machine *sm)
 {
 	sci_state_machine_exit_state(sm);
-#if defined(SCI_BASE_ENABLE_SUBJECT_NOTIFICATION)
-	sci_base_subject_notify(&sm->parent);
-#endif
 }
 
 /**
@@ -158,11 +152,6 @@ void sci_base_state_machine_change_state(
 	sm->previous_state_id = sm->current_state_id;
 	sm->current_state_id = next_state;
 
-#if defined(SCI_BASE_ENABLE_SUBJECT_NOTIFICATION)
-	/* Notify of the state change prior to entering the state. */
-	sci_base_subject_notify(&sm->parent);
-#endif
-
 	sci_state_machine_enter_state(sm);
 }
 

drivers/scsi/isci/core/sci_base_state_machine.h → drivers/scsi/isci/state_machine.h

@@ -56,18 +56,32 @@
 #ifndef _SCI_BASE_STATE_MACHINE_H_
 #define _SCI_BASE_STATE_MACHINE_H_
 
-#include <linux/string.h>
+#include <linux/types.h>
+
+typedef void (*sci_base_state_handler_t)(void);
+
+typedef void (*sci_state_transition_t)(void *base_object);
 
 /**
- * This file contains all structures, constants, or method declarations common
- *    to all state machines defined in SCI.
+ * struct sci_base_state - The base state object abstracts the fields common to
+ *    all state objects defined in SCI.
  *
  *
  */
+struct sci_base_state {
+	/**
+	 * This field is a function pointer that defines the method to be
+	 * invoked when the state is entered.
+	 */
+	sci_state_transition_t enter_state;
 
+	/**
+	 * This field is a function pointer that defines the method to be
+	 * invoked when the state is exited.
+	 */
+	sci_state_transition_t exit_state;
 
-#include "sci_base_state.h"
-
+};
 
 /**
  * SET_STATE_HANDLER() -