a8237fc410
This patch introduces a struct subchannel_id containing the subchannel number (formerly referred to as "irq") and switches code formerly relying on the subchannel number over to it. While we're touching inline assemblies anyway, make sure they have correct memory constraints. Signed-off-by: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
#ifndef S390_DEVICE_H
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#define S390_DEVICE_H
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/*
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* states of the device statemachine
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*/
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enum dev_state {
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DEV_STATE_NOT_OPER,
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DEV_STATE_SENSE_PGID,
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DEV_STATE_SENSE_ID,
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DEV_STATE_OFFLINE,
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DEV_STATE_VERIFY,
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DEV_STATE_ONLINE,
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DEV_STATE_W4SENSE,
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DEV_STATE_DISBAND_PGID,
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DEV_STATE_BOXED,
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/* states to wait for i/o completion before doing something */
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DEV_STATE_CLEAR_VERIFY,
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DEV_STATE_TIMEOUT_KILL,
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DEV_STATE_WAIT4IO,
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DEV_STATE_QUIESCE,
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/* special states for devices gone not operational */
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DEV_STATE_DISCONNECTED,
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DEV_STATE_DISCONNECTED_SENSE_ID,
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DEV_STATE_CMFCHANGE,
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/* last element! */
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NR_DEV_STATES
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};
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/*
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* asynchronous events of the device statemachine
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*/
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enum dev_event {
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DEV_EVENT_NOTOPER,
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DEV_EVENT_INTERRUPT,
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DEV_EVENT_TIMEOUT,
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DEV_EVENT_VERIFY,
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/* last element! */
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NR_DEV_EVENTS
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};
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struct ccw_device;
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/*
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* action called through jumptable
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*/
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typedef void (fsm_func_t)(struct ccw_device *, enum dev_event);
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extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS];
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static inline void
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dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
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{
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dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
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}
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/*
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* Delivers 1 if the device state is final.
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*/
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static inline int
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dev_fsm_final_state(struct ccw_device *cdev)
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{
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return (cdev->private->state == DEV_STATE_NOT_OPER ||
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cdev->private->state == DEV_STATE_OFFLINE ||
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cdev->private->state == DEV_STATE_ONLINE ||
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cdev->private->state == DEV_STATE_BOXED);
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}
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extern struct workqueue_struct *ccw_device_work;
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extern struct workqueue_struct *ccw_device_notify_work;
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void io_subchannel_recog_done(struct ccw_device *cdev);
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int ccw_device_cancel_halt_clear(struct ccw_device *);
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int ccw_device_register(struct ccw_device *);
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void ccw_device_do_unreg_rereg(void *);
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void ccw_device_call_sch_unregister(void *);
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int ccw_device_recognition(struct ccw_device *);
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int ccw_device_online(struct ccw_device *);
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int ccw_device_offline(struct ccw_device *);
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/* Function prototypes for device status and basic sense stuff. */
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void ccw_device_accumulate_irb(struct ccw_device *, struct irb *);
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void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *);
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int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *);
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int ccw_device_do_sense(struct ccw_device *, struct irb *);
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/* Function prototypes for sense id stuff. */
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void ccw_device_sense_id_start(struct ccw_device *);
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void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event);
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void ccw_device_sense_id_done(struct ccw_device *, int);
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/* Function prototypes for path grouping stuff. */
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void ccw_device_sense_pgid_start(struct ccw_device *);
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void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event);
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void ccw_device_sense_pgid_done(struct ccw_device *, int);
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void ccw_device_verify_start(struct ccw_device *);
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void ccw_device_verify_irq(struct ccw_device *, enum dev_event);
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void ccw_device_verify_done(struct ccw_device *, int);
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void ccw_device_disband_start(struct ccw_device *);
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void ccw_device_disband_irq(struct ccw_device *, enum dev_event);
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void ccw_device_disband_done(struct ccw_device *, int);
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int ccw_device_call_handler(struct ccw_device *);
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int ccw_device_stlck(struct ccw_device *);
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/* qdio needs this. */
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void ccw_device_set_timeout(struct ccw_device *, int);
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extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *);
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void retry_set_schib(struct ccw_device *cdev);
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#endif
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