Commit | Line | Data |
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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 | ||
cd6b4f27 CH |
8 | #include "io_sch.h" |
9 | ||
1da177e4 LT |
10 | /* |
11 | * states of the device statemachine | |
12 | */ | |
13 | enum dev_state { | |
14 | DEV_STATE_NOT_OPER, | |
15 | DEV_STATE_SENSE_PGID, | |
16 | DEV_STATE_SENSE_ID, | |
17 | DEV_STATE_OFFLINE, | |
18 | DEV_STATE_VERIFY, | |
19 | DEV_STATE_ONLINE, | |
20 | DEV_STATE_W4SENSE, | |
21 | DEV_STATE_DISBAND_PGID, | |
22 | DEV_STATE_BOXED, | |
23 | /* states to wait for i/o completion before doing something */ | |
1da177e4 | 24 | DEV_STATE_TIMEOUT_KILL, |
1da177e4 LT |
25 | DEV_STATE_QUIESCE, |
26 | /* special states for devices gone not operational */ | |
27 | DEV_STATE_DISCONNECTED, | |
28 | DEV_STATE_DISCONNECTED_SENSE_ID, | |
29 | DEV_STATE_CMFCHANGE, | |
94bb0633 | 30 | DEV_STATE_CMFUPDATE, |
d7d12ef2 | 31 | DEV_STATE_STEAL_LOCK, |
1da177e4 LT |
32 | /* last element! */ |
33 | NR_DEV_STATES | |
34 | }; | |
35 | ||
36 | /* | |
37 | * asynchronous events of the device statemachine | |
38 | */ | |
39 | enum dev_event { | |
40 | DEV_EVENT_NOTOPER, | |
41 | DEV_EVENT_INTERRUPT, | |
42 | DEV_EVENT_TIMEOUT, | |
43 | DEV_EVENT_VERIFY, | |
44 | /* last element! */ | |
45 | NR_DEV_EVENTS | |
46 | }; | |
47 | ||
48 | struct ccw_device; | |
49 | ||
50 | /* | |
51 | * action called through jumptable | |
52 | */ | |
53 | typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); | |
54 | extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; | |
55 | ||
56 | static inline void | |
57 | dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) | |
58 | { | |
59 | dev_jumptable[cdev->private->state][dev_event](cdev, dev_event); | |
60 | } | |
61 | ||
62 | /* | |
63 | * Delivers 1 if the device state is final. | |
64 | */ | |
65 | static inline int | |
66 | dev_fsm_final_state(struct ccw_device *cdev) | |
67 | { | |
68 | return (cdev->private->state == DEV_STATE_NOT_OPER || | |
69 | cdev->private->state == DEV_STATE_OFFLINE || | |
70 | cdev->private->state == DEV_STATE_ONLINE || | |
71 | cdev->private->state == DEV_STATE_BOXED); | |
72 | } | |
73 | ||
74 | extern struct workqueue_struct *ccw_device_work; | |
40154b82 PO |
75 | extern wait_queue_head_t ccw_device_init_wq; |
76 | extern atomic_t ccw_device_init_count; | |
2f17644d | 77 | int __init io_subchannel_init(void); |
1da177e4 LT |
78 | |
79 | void io_subchannel_recog_done(struct ccw_device *cdev); | |
13952ec1 | 80 | void io_subchannel_init_config(struct subchannel *sch); |
1da177e4 LT |
81 | |
82 | int ccw_device_cancel_halt_clear(struct ccw_device *); | |
83 | ||
d7b5a4c9 | 84 | int ccw_device_is_orphan(struct ccw_device *); |
1da177e4 | 85 | |
736b5db8 | 86 | void ccw_device_recognition(struct ccw_device *); |
1da177e4 LT |
87 | int ccw_device_online(struct ccw_device *); |
88 | int ccw_device_offline(struct ccw_device *); | |
823d494a SO |
89 | void ccw_device_update_sense_data(struct ccw_device *); |
90 | int ccw_device_test_sense_data(struct ccw_device *); | |
c4621a62 | 91 | void ccw_device_schedule_sch_unregister(struct ccw_device *); |
ecf5d9ef | 92 | int ccw_purge_blacklisted(void); |
37de53bb | 93 | void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo); |
1da177e4 LT |
94 | |
95 | /* Function prototypes for device status and basic sense stuff. */ | |
96 | void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); | |
97 | void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); | |
98 | int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); | |
99 | int ccw_device_do_sense(struct ccw_device *, struct irb *); | |
100 | ||
e1f0fbd6 PO |
101 | /* Function prototype for internal request handling. */ |
102 | int lpm_adjust(int lpm, int mask); | |
103 | void ccw_request_start(struct ccw_device *); | |
104 | int ccw_request_cancel(struct ccw_device *cdev); | |
105 | void ccw_request_handler(struct ccw_device *cdev); | |
106 | void ccw_request_timeout(struct ccw_device *cdev); | |
107 | void ccw_request_notoper(struct ccw_device *cdev); | |
108 | ||
1da177e4 LT |
109 | /* Function prototypes for sense id stuff. */ |
110 | void ccw_device_sense_id_start(struct ccw_device *); | |
1da177e4 LT |
111 | void ccw_device_sense_id_done(struct ccw_device *, int); |
112 | ||
113 | /* Function prototypes for path grouping stuff. */ | |
1da177e4 | 114 | void ccw_device_verify_start(struct ccw_device *); |
1da177e4 LT |
115 | void ccw_device_verify_done(struct ccw_device *, int); |
116 | ||
117 | void ccw_device_disband_start(struct ccw_device *); | |
1da177e4 LT |
118 | void ccw_device_disband_done(struct ccw_device *, int); |
119 | ||
d7d12ef2 PO |
120 | void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *); |
121 | void ccw_device_stlck_done(struct ccw_device *, void *, int); | |
122 | ||
1da177e4 LT |
123 | int ccw_device_call_handler(struct ccw_device *); |
124 | ||
125 | int ccw_device_stlck(struct ccw_device *); | |
126 | ||
c820de39 CH |
127 | /* Helper function for machine check handling. */ |
128 | void ccw_device_trigger_reprobe(struct ccw_device *); | |
129 | void ccw_device_kill_io(struct ccw_device *); | |
130 | int ccw_device_notify(struct ccw_device *, int); | |
6afcc775 | 131 | void ccw_device_set_disconnected(struct ccw_device *cdev); |
91c36919 | 132 | void ccw_device_set_notoper(struct ccw_device *cdev); |
c820de39 | 133 | |
1da177e4 LT |
134 | /* qdio needs this. */ |
135 | void ccw_device_set_timeout(struct ccw_device *, int); | |
a8237fc4 | 136 | extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); |
2b67fc46 | 137 | extern struct bus_type ccw_bus_type; |
1da177e4 | 138 | |
94bb0633 | 139 | /* Channel measurement facility related */ |
1da177e4 | 140 | void retry_set_schib(struct ccw_device *cdev); |
94bb0633 CH |
141 | void cmf_retry_copy_block(struct ccw_device *); |
142 | int cmf_reenable(struct ccw_device *); | |
823d494a | 143 | int ccw_set_cmf(struct ccw_device *cdev, int enable); |
a806170e | 144 | extern struct device_attribute dev_attr_cmb_enable; |
1da177e4 | 145 | #endif |