| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #ifndef S390_DEVICE_H |
| 2 | #define S390_DEVICE_H |
| 3 | |
| 4 | /* |
| 5 | * states of the device statemachine |
| 6 | */ |
| 7 | enum dev_state { |
| 8 | DEV_STATE_NOT_OPER, |
| 9 | DEV_STATE_SENSE_PGID, |
| 10 | DEV_STATE_SENSE_ID, |
| 11 | DEV_STATE_OFFLINE, |
| 12 | DEV_STATE_VERIFY, |
| 13 | DEV_STATE_ONLINE, |
| 14 | DEV_STATE_W4SENSE, |
| 15 | DEV_STATE_DISBAND_PGID, |
| 16 | DEV_STATE_BOXED, |
| 17 | /* states to wait for i/o completion before doing something */ |
| 18 | DEV_STATE_CLEAR_VERIFY, |
| 19 | DEV_STATE_TIMEOUT_KILL, |
| 20 | DEV_STATE_WAIT4IO, |
| 21 | DEV_STATE_QUIESCE, |
| 22 | /* special states for devices gone not operational */ |
| 23 | DEV_STATE_DISCONNECTED, |
| 24 | DEV_STATE_DISCONNECTED_SENSE_ID, |
| 25 | DEV_STATE_CMFCHANGE, |
| 26 | /* last element! */ |
| 27 | NR_DEV_STATES |
| 28 | }; |
| 29 | |
| 30 | /* |
| 31 | * asynchronous events of the device statemachine |
| 32 | */ |
| 33 | enum dev_event { |
| 34 | DEV_EVENT_NOTOPER, |
| 35 | DEV_EVENT_INTERRUPT, |
| 36 | DEV_EVENT_TIMEOUT, |
| 37 | DEV_EVENT_VERIFY, |
| 38 | /* last element! */ |
| 39 | NR_DEV_EVENTS |
| 40 | }; |
| 41 | |
| 42 | struct ccw_device; |
| 43 | |
| 44 | /* |
| 45 | * action called through jumptable |
| 46 | */ |
| 47 | typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); |
| 48 | extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; |
| 49 | |
| 50 | static inline void |
| 51 | dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) |
| 52 | { |
| 53 | dev_jumptable[cdev->private->state][dev_event](cdev, dev_event); |
| 54 | } |
| 55 | |
| 56 | /* |
| 57 | * Delivers 1 if the device state is final. |
| 58 | */ |
| 59 | static inline int |
| 60 | dev_fsm_final_state(struct ccw_device *cdev) |
| 61 | { |
| 62 | return (cdev->private->state == DEV_STATE_NOT_OPER || |
| 63 | cdev->private->state == DEV_STATE_OFFLINE || |
| 64 | cdev->private->state == DEV_STATE_ONLINE || |
| 65 | cdev->private->state == DEV_STATE_BOXED); |
| 66 | } |
| 67 | |
| 68 | extern struct workqueue_struct *ccw_device_work; |
| 69 | extern struct workqueue_struct *ccw_device_notify_work; |
| 70 | |
| 71 | void io_subchannel_recog_done(struct ccw_device *cdev); |
| 72 | |
| 73 | int ccw_device_cancel_halt_clear(struct ccw_device *); |
| 74 | |
| 75 | int ccw_device_register(struct ccw_device *); |
| 76 | void ccw_device_do_unreg_rereg(void *); |
| 77 | void ccw_device_call_sch_unregister(void *); |
| 78 | |
| 79 | int ccw_device_recognition(struct ccw_device *); |
| 80 | int ccw_device_online(struct ccw_device *); |
| 81 | int ccw_device_offline(struct ccw_device *); |
| 82 | |
| 83 | /* Function prototypes for device status and basic sense stuff. */ |
| 84 | void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); |
| 85 | void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); |
| 86 | int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); |
| 87 | int ccw_device_do_sense(struct ccw_device *, struct irb *); |
| 88 | |
| 89 | /* Function prototypes for sense id stuff. */ |
| 90 | void ccw_device_sense_id_start(struct ccw_device *); |
| 91 | void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event); |
| 92 | void ccw_device_sense_id_done(struct ccw_device *, int); |
| 93 | |
| 94 | /* Function prototypes for path grouping stuff. */ |
| 95 | void ccw_device_sense_pgid_start(struct ccw_device *); |
| 96 | void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event); |
| 97 | void ccw_device_sense_pgid_done(struct ccw_device *, int); |
| 98 | |
| 99 | void ccw_device_verify_start(struct ccw_device *); |
| 100 | void ccw_device_verify_irq(struct ccw_device *, enum dev_event); |
| 101 | void ccw_device_verify_done(struct ccw_device *, int); |
| 102 | |
| 103 | void ccw_device_disband_start(struct ccw_device *); |
| 104 | void ccw_device_disband_irq(struct ccw_device *, enum dev_event); |
| 105 | void ccw_device_disband_done(struct ccw_device *, int); |
| 106 | |
| 107 | int ccw_device_call_handler(struct ccw_device *); |
| 108 | |
| 109 | int ccw_device_stlck(struct ccw_device *); |
| 110 | |
| 111 | /* qdio needs this. */ |
| 112 | void ccw_device_set_timeout(struct ccw_device *, int); |
| 113 | |
| 114 | void retry_set_schib(struct ccw_device *cdev); |
| 115 | #endif |