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1da177e4 LT |
1 | #ifndef S390_DEVICE_H |
2 | #define S390_DEVICE_H | |
3 | ||
40154b82 PO |
4 | #include <asm/ccwdev.h> |
5 | #include <asm/atomic.h> | |
6 | #include <linux/wait.h> | |
7 | ||
1da177e4 LT |
8 | /* |
9 | * states of the device statemachine | |
10 | */ | |
11 | enum dev_state { | |
12 | DEV_STATE_NOT_OPER, | |
13 | DEV_STATE_SENSE_PGID, | |
14 | DEV_STATE_SENSE_ID, | |
15 | DEV_STATE_OFFLINE, | |
16 | DEV_STATE_VERIFY, | |
17 | DEV_STATE_ONLINE, | |
18 | DEV_STATE_W4SENSE, | |
19 | DEV_STATE_DISBAND_PGID, | |
20 | DEV_STATE_BOXED, | |
21 | /* states to wait for i/o completion before doing something */ | |
22 | DEV_STATE_CLEAR_VERIFY, | |
23 | DEV_STATE_TIMEOUT_KILL, | |
1da177e4 LT |
24 | DEV_STATE_QUIESCE, |
25 | /* special states for devices gone not operational */ | |
26 | DEV_STATE_DISCONNECTED, | |
27 | DEV_STATE_DISCONNECTED_SENSE_ID, | |
28 | DEV_STATE_CMFCHANGE, | |
94bb0633 | 29 | DEV_STATE_CMFUPDATE, |
1da177e4 LT |
30 | /* last element! */ |
31 | NR_DEV_STATES | |
32 | }; | |
33 | ||
34 | /* | |
35 | * asynchronous events of the device statemachine | |
36 | */ | |
37 | enum dev_event { | |
38 | DEV_EVENT_NOTOPER, | |
39 | DEV_EVENT_INTERRUPT, | |
40 | DEV_EVENT_TIMEOUT, | |
41 | DEV_EVENT_VERIFY, | |
42 | /* last element! */ | |
43 | NR_DEV_EVENTS | |
44 | }; | |
45 | ||
46 | struct ccw_device; | |
47 | ||
48 | /* | |
49 | * action called through jumptable | |
50 | */ | |
51 | typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); | |
52 | extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; | |
53 | ||
54 | static inline void | |
55 | dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) | |
56 | { | |
57 | dev_jumptable[cdev->private->state][dev_event](cdev, dev_event); | |
58 | } | |
59 | ||
60 | /* | |
61 | * Delivers 1 if the device state is final. | |
62 | */ | |
63 | static inline int | |
64 | dev_fsm_final_state(struct ccw_device *cdev) | |
65 | { | |
66 | return (cdev->private->state == DEV_STATE_NOT_OPER || | |
67 | cdev->private->state == DEV_STATE_OFFLINE || | |
68 | cdev->private->state == DEV_STATE_ONLINE || | |
69 | cdev->private->state == DEV_STATE_BOXED); | |
70 | } | |
71 | ||
72 | extern struct workqueue_struct *ccw_device_work; | |
73 | extern struct workqueue_struct *ccw_device_notify_work; | |
40154b82 PO |
74 | extern wait_queue_head_t ccw_device_init_wq; |
75 | extern atomic_t ccw_device_init_count; | |
1da177e4 LT |
76 | |
77 | void io_subchannel_recog_done(struct ccw_device *cdev); | |
78 | ||
79 | int ccw_device_cancel_halt_clear(struct ccw_device *); | |
80 | ||
c1637532 MS |
81 | void ccw_device_do_unreg_rereg(struct work_struct *); |
82 | void ccw_device_call_sch_unregister(struct work_struct *); | |
d7b5a4c9 CH |
83 | void ccw_device_move_to_orphanage(struct work_struct *); |
84 | int ccw_device_is_orphan(struct ccw_device *); | |
1da177e4 LT |
85 | |
86 | int ccw_device_recognition(struct ccw_device *); | |
87 | int ccw_device_online(struct ccw_device *); | |
88 | int ccw_device_offline(struct ccw_device *); | |
89 | ||
90 | /* Function prototypes for device status and basic sense stuff. */ | |
91 | void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); | |
92 | void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); | |
93 | int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); | |
94 | int ccw_device_do_sense(struct ccw_device *, struct irb *); | |
95 | ||
96 | /* Function prototypes for sense id stuff. */ | |
97 | void ccw_device_sense_id_start(struct ccw_device *); | |
98 | void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event); | |
99 | void ccw_device_sense_id_done(struct ccw_device *, int); | |
100 | ||
101 | /* Function prototypes for path grouping stuff. */ | |
102 | void ccw_device_sense_pgid_start(struct ccw_device *); | |
103 | void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event); | |
104 | void ccw_device_sense_pgid_done(struct ccw_device *, int); | |
105 | ||
106 | void ccw_device_verify_start(struct ccw_device *); | |
107 | void ccw_device_verify_irq(struct ccw_device *, enum dev_event); | |
108 | void ccw_device_verify_done(struct ccw_device *, int); | |
109 | ||
110 | void ccw_device_disband_start(struct ccw_device *); | |
111 | void ccw_device_disband_irq(struct ccw_device *, enum dev_event); | |
112 | void ccw_device_disband_done(struct ccw_device *, int); | |
113 | ||
114 | int ccw_device_call_handler(struct ccw_device *); | |
115 | ||
116 | int ccw_device_stlck(struct ccw_device *); | |
117 | ||
118 | /* qdio needs this. */ | |
119 | void ccw_device_set_timeout(struct ccw_device *, int); | |
a8237fc4 | 120 | extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); |
1da177e4 | 121 | |
94bb0633 | 122 | /* Channel measurement facility related */ |
1da177e4 | 123 | void retry_set_schib(struct ccw_device *cdev); |
94bb0633 CH |
124 | void cmf_retry_copy_block(struct ccw_device *); |
125 | int cmf_reenable(struct ccw_device *); | |
1da177e4 | 126 | #endif |