isci: additional state machine cleanup

Additional state machine cleanups:

 o Remove static functions sci_state_machine_exit_state() and
   sci_state_machine_enter_state()
 o Combines sci_base_state_machine_construct() and
   sci_base_state_machine_start() into a single function,
   sci_init_sm()
 o Remove sci_base_state_machine_stop() which is unused.
 o Kill state_machine.[ch]

Signed-off-by: Edmund Nadolski <edmund.nadolski@intel.com>
[fixed too large to inline functions]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

1 files changed, 34 insertions, 5 deletions

diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c
index 81ee64c0a4b7..f502882a2e17 100644
--- a/drivers/scsi/isci/host.c
+++ b/drivers/scsi/isci/host.c
@@ -197,6 +197,39 @@
  */
 #define COMPLETION_QUEUE_CYCLE_BIT(x) ((x) & 0x80000000)
 
+/* Init the state machine and call the state entry function (if any) */
+void sci_init_sm(struct sci_base_state_machine *sm,
+                 const struct sci_base_state *state_table, u32 initial_state)
+{
+        sci_state_transition_t handler;
+
+        sm->initial_state_id    = initial_state;
+        sm->previous_state_id   = initial_state;
+        sm->current_state_id    = initial_state;
+        sm->state_table         = state_table;
+
+        handler = sm->state_table[initial_state].enter_state;
+        if (handler)
+                handler(sm);
+}
+
+/* Call the state exit fn, update the current state, call the state entry fn */
+void sci_change_state(struct sci_base_state_machine *sm, u32 next_state)
+{
+        sci_state_transition_t handler;
+
+        handler = sm->state_table[sm->current_state_id].exit_state;
+        if (handler)
+                handler(sm);
+
+        sm->previous_state_id = sm->current_state_id;
+        sm->current_state_id = next_state;
+
+        handler = sm->state_table[sm->current_state_id].enter_state;
+        if (handler)
+                handler(sm);
+}
+
 static bool scic_sds_controller_completion_queue_has_entries(
         struct scic_sds_controller *scic)
 {
@@ -1807,11 +1840,7 @@ static enum sci_status scic_controller_construct(struct scic_sds_controller *sci
         struct isci_host *ihost = scic_to_ihost(scic);
         u8 i;
 
-        sci_base_state_machine_construct(&scic->sm,
-                                         scic_sds_controller_state_table,
-                                         SCIC_INITIAL);
-
-        sci_base_state_machine_start(&scic->sm);
+        sci_init_sm(&scic->sm, scic_sds_controller_state_table, SCIC_INITIAL);
 
         scic->scu_registers = scu_base;
         scic->smu_registers = smu_base;