Commit | Line | Data |
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1da177e4 LT |
1 | #ifndef S390_DEVICE_H |
2 | #define S390_DEVICE_H | |
3 | ||
40154b82 | 4 | #include <asm/ccwdev.h> |
60063497 | 5 | #include <linux/atomic.h> |
40154b82 | 6 | #include <linux/wait.h> |
76e6fb4b | 7 | #include <linux/notifier.h> |
de400d6b | 8 | #include <linux/kernel_stat.h> |
cd6b4f27 CH |
9 | #include "io_sch.h" |
10 | ||
1da177e4 LT |
11 | /* |
12 | * states of the device statemachine | |
13 | */ | |
14 | enum dev_state { | |
15 | DEV_STATE_NOT_OPER, | |
16 | DEV_STATE_SENSE_PGID, | |
17 | DEV_STATE_SENSE_ID, | |
18 | DEV_STATE_OFFLINE, | |
19 | DEV_STATE_VERIFY, | |
20 | DEV_STATE_ONLINE, | |
21 | DEV_STATE_W4SENSE, | |
22 | DEV_STATE_DISBAND_PGID, | |
23 | DEV_STATE_BOXED, | |
24 | /* states to wait for i/o completion before doing something */ | |
1da177e4 | 25 | DEV_STATE_TIMEOUT_KILL, |
1da177e4 LT |
26 | DEV_STATE_QUIESCE, |
27 | /* special states for devices gone not operational */ | |
28 | DEV_STATE_DISCONNECTED, | |
29 | DEV_STATE_DISCONNECTED_SENSE_ID, | |
30 | DEV_STATE_CMFCHANGE, | |
94bb0633 | 31 | DEV_STATE_CMFUPDATE, |
d7d12ef2 | 32 | DEV_STATE_STEAL_LOCK, |
1da177e4 LT |
33 | /* last element! */ |
34 | NR_DEV_STATES | |
35 | }; | |
36 | ||
37 | /* | |
38 | * asynchronous events of the device statemachine | |
39 | */ | |
40 | enum dev_event { | |
41 | DEV_EVENT_NOTOPER, | |
42 | DEV_EVENT_INTERRUPT, | |
43 | DEV_EVENT_TIMEOUT, | |
44 | DEV_EVENT_VERIFY, | |
45 | /* last element! */ | |
46 | NR_DEV_EVENTS | |
47 | }; | |
48 | ||
49 | struct ccw_device; | |
50 | ||
51 | /* | |
52 | * action called through jumptable | |
53 | */ | |
54 | typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); | |
55 | extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; | |
56 | ||
57 | static inline void | |
58 | dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) | |
59 | { | |
de400d6b PO |
60 | int state = cdev->private->state; |
61 | ||
62 | if (dev_event == DEV_EVENT_INTERRUPT) { | |
63 | if (state == DEV_STATE_ONLINE) | |
420f42ec | 64 | inc_irq_stat(cdev->private->int_class); |
de400d6b PO |
65 | else if (state != DEV_STATE_CMFCHANGE && |
66 | state != DEV_STATE_CMFUPDATE) | |
420f42ec | 67 | inc_irq_stat(IRQIO_CIO); |
de400d6b PO |
68 | } |
69 | dev_jumptable[state][dev_event](cdev, dev_event); | |
1da177e4 LT |
70 | } |
71 | ||
72 | /* | |
73 | * Delivers 1 if the device state is final. | |
74 | */ | |
75 | static inline int | |
76 | dev_fsm_final_state(struct ccw_device *cdev) | |
77 | { | |
78 | return (cdev->private->state == DEV_STATE_NOT_OPER || | |
79 | cdev->private->state == DEV_STATE_OFFLINE || | |
80 | cdev->private->state == DEV_STATE_ONLINE || | |
81 | cdev->private->state == DEV_STATE_BOXED); | |
82 | } | |
83 | ||
40154b82 PO |
84 | extern wait_queue_head_t ccw_device_init_wq; |
85 | extern atomic_t ccw_device_init_count; | |
2f17644d | 86 | int __init io_subchannel_init(void); |
1da177e4 LT |
87 | |
88 | void io_subchannel_recog_done(struct ccw_device *cdev); | |
13952ec1 | 89 | void io_subchannel_init_config(struct subchannel *sch); |
1da177e4 LT |
90 | |
91 | int ccw_device_cancel_halt_clear(struct ccw_device *); | |
92 | ||
d7b5a4c9 | 93 | int ccw_device_is_orphan(struct ccw_device *); |
1da177e4 | 94 | |
736b5db8 | 95 | void ccw_device_recognition(struct ccw_device *); |
1da177e4 LT |
96 | int ccw_device_online(struct ccw_device *); |
97 | int ccw_device_offline(struct ccw_device *); | |
823d494a SO |
98 | void ccw_device_update_sense_data(struct ccw_device *); |
99 | int ccw_device_test_sense_data(struct ccw_device *); | |
c4621a62 | 100 | void ccw_device_schedule_sch_unregister(struct ccw_device *); |
ecf5d9ef | 101 | int ccw_purge_blacklisted(void); |
37de53bb | 102 | void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo); |
b7a610f7 | 103 | struct ccw_device *get_ccwdev_by_dev_id(struct ccw_dev_id *dev_id); |
1da177e4 LT |
104 | |
105 | /* Function prototypes for device status and basic sense stuff. */ | |
106 | void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); | |
107 | void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); | |
108 | int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); | |
109 | int ccw_device_do_sense(struct ccw_device *, struct irb *); | |
110 | ||
e1f0fbd6 PO |
111 | /* Function prototype for internal request handling. */ |
112 | int lpm_adjust(int lpm, int mask); | |
113 | void ccw_request_start(struct ccw_device *); | |
114 | int ccw_request_cancel(struct ccw_device *cdev); | |
115 | void ccw_request_handler(struct ccw_device *cdev); | |
116 | void ccw_request_timeout(struct ccw_device *cdev); | |
117 | void ccw_request_notoper(struct ccw_device *cdev); | |
118 | ||
1da177e4 LT |
119 | /* Function prototypes for sense id stuff. */ |
120 | void ccw_device_sense_id_start(struct ccw_device *); | |
1da177e4 LT |
121 | void ccw_device_sense_id_done(struct ccw_device *, int); |
122 | ||
123 | /* Function prototypes for path grouping stuff. */ | |
1da177e4 | 124 | void ccw_device_verify_start(struct ccw_device *); |
1da177e4 LT |
125 | void ccw_device_verify_done(struct ccw_device *, int); |
126 | ||
127 | void ccw_device_disband_start(struct ccw_device *); | |
1da177e4 LT |
128 | void ccw_device_disband_done(struct ccw_device *, int); |
129 | ||
d7d12ef2 PO |
130 | void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *); |
131 | void ccw_device_stlck_done(struct ccw_device *, void *, int); | |
132 | ||
1da177e4 LT |
133 | int ccw_device_call_handler(struct ccw_device *); |
134 | ||
135 | int ccw_device_stlck(struct ccw_device *); | |
136 | ||
c820de39 CH |
137 | /* Helper function for machine check handling. */ |
138 | void ccw_device_trigger_reprobe(struct ccw_device *); | |
139 | void ccw_device_kill_io(struct ccw_device *); | |
140 | int ccw_device_notify(struct ccw_device *, int); | |
6afcc775 | 141 | void ccw_device_set_disconnected(struct ccw_device *cdev); |
91c36919 | 142 | void ccw_device_set_notoper(struct ccw_device *cdev); |
c820de39 | 143 | |
1da177e4 LT |
144 | void ccw_device_set_timeout(struct ccw_device *, int); |
145 | ||
94bb0633 | 146 | /* Channel measurement facility related */ |
1da177e4 | 147 | void retry_set_schib(struct ccw_device *cdev); |
94bb0633 CH |
148 | void cmf_retry_copy_block(struct ccw_device *); |
149 | int cmf_reenable(struct ccw_device *); | |
823d494a | 150 | int ccw_set_cmf(struct ccw_device *cdev, int enable); |
a806170e | 151 | extern struct device_attribute dev_attr_cmb_enable; |
1da177e4 | 152 | #endif |