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#ifndef S390_DEVICE_H
#define S390_DEVICE_H
 
#include <asm/ccwdev.h>
#include <asm/atomic.h>
#include <linux/wait.h>
 
/*
 * states of the device statemachine
 */
enum dev_state {
	DEV_STATE_NOT_OPER,
	DEV_STATE_SENSE_PGID,
	DEV_STATE_SENSE_ID,
	DEV_STATE_OFFLINE,
	DEV_STATE_VERIFY,
	DEV_STATE_ONLINE,
	DEV_STATE_W4SENSE,
	DEV_STATE_DISBAND_PGID,
	DEV_STATE_BOXED,
	/* states to wait for i/o completion before doing something */
	DEV_STATE_CLEAR_VERIFY,
	DEV_STATE_TIMEOUT_KILL,
	DEV_STATE_QUIESCE,
	/* special states for devices gone not operational */
	DEV_STATE_DISCONNECTED,
	DEV_STATE_DISCONNECTED_SENSE_ID,
	DEV_STATE_CMFCHANGE,
	DEV_STATE_CMFUPDATE,
	/* last element! */
	NR_DEV_STATES
};
 
/*
 * asynchronous events of the device statemachine
 */
enum dev_event {
	DEV_EVENT_NOTOPER,
	DEV_EVENT_INTERRUPT,
	DEV_EVENT_TIMEOUT,
	DEV_EVENT_VERIFY,
	/* last element! */
	NR_DEV_EVENTS
};
 
struct ccw_device;
 
/*
 * action called through jumptable
 */
typedef void (fsm_func_t)(struct ccw_device *, enum dev_event);
extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS];
 
static inline void
dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
{
	dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
}
 
/*
 * Delivers 1 if the device state is final.
 */
static inline int
dev_fsm_final_state(struct ccw_device *cdev)
{
	return (cdev->private->state == DEV_STATE_NOT_OPER ||
		cdev->private->state == DEV_STATE_OFFLINE ||
		cdev->private->state == DEV_STATE_ONLINE ||
		cdev->private->state == DEV_STATE_BOXED);
}
 
extern struct workqueue_struct *ccw_device_work;
extern struct workqueue_struct *ccw_device_notify_work;
extern wait_queue_head_t ccw_device_init_wq;
extern atomic_t ccw_device_init_count;
 
void io_subchannel_irq (struct device *pdev);
void io_subchannel_recog_done(struct ccw_device *cdev);
 
int ccw_device_cancel_halt_clear(struct ccw_device *);
 
void ccw_device_do_unreg_rereg(struct work_struct *);
void ccw_device_move_to_orphanage(struct work_struct *);
int ccw_device_is_orphan(struct ccw_device *);
 
int ccw_device_recognition(struct ccw_device *);
int ccw_device_online(struct ccw_device *);
int ccw_device_offline(struct ccw_device *);
 
/* Function prototypes for device status and basic sense stuff. */
void ccw_device_accumulate_irb(struct ccw_device *, struct irb *);
void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *);
int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *);
int ccw_device_do_sense(struct ccw_device *, struct irb *);
 
/* Function prototypes for sense id stuff. */
void ccw_device_sense_id_start(struct ccw_device *);
void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event);
void ccw_device_sense_id_done(struct ccw_device *, int);
 
/* Function prototypes for path grouping stuff. */
void ccw_device_sense_pgid_start(struct ccw_device *);
void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event);
void ccw_device_sense_pgid_done(struct ccw_device *, int);
 
void ccw_device_verify_start(struct ccw_device *);
void ccw_device_verify_irq(struct ccw_device *, enum dev_event);
void ccw_device_verify_done(struct ccw_device *, int);
 
void ccw_device_disband_start(struct ccw_device *);
void ccw_device_disband_irq(struct ccw_device *, enum dev_event);
void ccw_device_disband_done(struct ccw_device *, int);
 
int ccw_device_call_handler(struct ccw_device *);
 
int ccw_device_stlck(struct ccw_device *);
 
/* qdio needs this. */
void ccw_device_set_timeout(struct ccw_device *, int);
extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *);
extern struct bus_type ccw_bus_type;
 
/* Channel measurement facility related */
void retry_set_schib(struct ccw_device *cdev);
void cmf_retry_copy_block(struct ccw_device *);
int cmf_reenable(struct ccw_device *);
#endif