Commit | Line | Data |
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1da177e4 LT |
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 |