1 files changed, 19 insertions, 0 deletions

diff --git a/drivers/scsi/isci/isci.h b/drivers/scsi/isci/isci.h
index 2fe5557d859..80cfb45f8da 100644
--- a/drivers/scsi/isci/isci.h
+++ b/drivers/scsi/isci/isci.h
@@ -57,6 +57,7 @@
 #define __ISCI_H__
 
 #include <linux/interrupt.h>
+#include <linux/types.h>
 
 #define DRV_NAME "isci"
 #define SCI_PCI_BAR_COUNT 2
@@ -584,4 +585,22 @@ static inline void sci_del_timer(struct sci_timer *tmr)
         del_timer(&tmr->timer);
 }
 
+struct sci_base_state_machine {
+        const struct sci_base_state *state_table;
+        u32 initial_state_id;
+        u32 current_state_id;
+        u32 previous_state_id;
+};
+
+typedef void (*sci_state_transition_t)(struct sci_base_state_machine *sm);
+
+struct sci_base_state {
+        sci_state_transition_t enter_state;     /* Called on state entry */
+        sci_state_transition_t exit_state;      /* Called on state exit */
+};
+
+extern void sci_init_sm(struct sci_base_state_machine *sm,
+                        const struct sci_base_state *state_table,
+                        u32 initial_state);
+extern void sci_change_state(struct sci_base_state_machine *sm, u32 next_state);
 #endif  /* __ISCI_H__ */