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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_WAIT4IO,
DEV_STATE_QUIESCE,
/* special states for devices gone not operational */
DEV_STATE_DISCONNECTED,
DEV_STATE_DISCONNECTED_SENSE_ID,
DEV_STATE_CMFCHANGE,
/* 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_recog_done(struct ccw_device *cdev);
int ccw_device_cancel_halt_clear(struct ccw_device *);
int ccw_device_register(struct ccw_device *);
void ccw_device_do_unreg_rereg(void *);
void ccw_device_call_sch_unregister(void *);
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 *);
void retry_set_schib(struct ccw_device *cdev);
#endif
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