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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef S390_DEVICE_H
2#define S390_DEVICE_H
3
Peter Oberparleiter40154b82006-06-29 14:57:03 +02004#include <asm/ccwdev.h>
5#include <asm/atomic.h>
6#include <linux/wait.h>
7
Linus Torvalds1da177e2005-04-16 15:20:36 -07008/*
9 * states of the device statemachine
10 */
11enum 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,
24 DEV_STATE_WAIT4IO,
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,
Cornelia Huck94bb0632006-06-29 15:08:41 +020030 DEV_STATE_CMFUPDATE,
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 /* last element! */
32 NR_DEV_STATES
33};
34
35/*
36 * asynchronous events of the device statemachine
37 */
38enum dev_event {
39 DEV_EVENT_NOTOPER,
40 DEV_EVENT_INTERRUPT,
41 DEV_EVENT_TIMEOUT,
42 DEV_EVENT_VERIFY,
43 /* last element! */
44 NR_DEV_EVENTS
45};
46
47struct ccw_device;
48
49/*
50 * action called through jumptable
51 */
52typedef void (fsm_func_t)(struct ccw_device *, enum dev_event);
53extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS];
54
55static inline void
56dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
57{
58 dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
59}
60
61/*
62 * Delivers 1 if the device state is final.
63 */
64static inline int
65dev_fsm_final_state(struct ccw_device *cdev)
66{
67 return (cdev->private->state == DEV_STATE_NOT_OPER ||
68 cdev->private->state == DEV_STATE_OFFLINE ||
69 cdev->private->state == DEV_STATE_ONLINE ||
70 cdev->private->state == DEV_STATE_BOXED);
71}
72
73extern struct workqueue_struct *ccw_device_work;
74extern struct workqueue_struct *ccw_device_notify_work;
Peter Oberparleiter40154b82006-06-29 14:57:03 +020075extern wait_queue_head_t ccw_device_init_wq;
76extern atomic_t ccw_device_init_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
78void io_subchannel_recog_done(struct ccw_device *cdev);
79
80int ccw_device_cancel_halt_clear(struct ccw_device *);
81
82int ccw_device_register(struct ccw_device *);
83void ccw_device_do_unreg_rereg(void *);
84void ccw_device_call_sch_unregister(void *);
85
86int ccw_device_recognition(struct ccw_device *);
87int ccw_device_online(struct ccw_device *);
88int ccw_device_offline(struct ccw_device *);
89
90/* Function prototypes for device status and basic sense stuff. */
91void ccw_device_accumulate_irb(struct ccw_device *, struct irb *);
92void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *);
93int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *);
94int ccw_device_do_sense(struct ccw_device *, struct irb *);
95
96/* Function prototypes for sense id stuff. */
97void ccw_device_sense_id_start(struct ccw_device *);
98void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event);
99void ccw_device_sense_id_done(struct ccw_device *, int);
100
101/* Function prototypes for path grouping stuff. */
102void ccw_device_sense_pgid_start(struct ccw_device *);
103void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event);
104void ccw_device_sense_pgid_done(struct ccw_device *, int);
105
106void ccw_device_verify_start(struct ccw_device *);
107void ccw_device_verify_irq(struct ccw_device *, enum dev_event);
108void ccw_device_verify_done(struct ccw_device *, int);
109
110void ccw_device_disband_start(struct ccw_device *);
111void ccw_device_disband_irq(struct ccw_device *, enum dev_event);
112void ccw_device_disband_done(struct ccw_device *, int);
113
114int ccw_device_call_handler(struct ccw_device *);
115
116int ccw_device_stlck(struct ccw_device *);
117
118/* qdio needs this. */
119void ccw_device_set_timeout(struct ccw_device *, int);
Cornelia Hucka8237fc2006-01-06 00:19:21 -0800120extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Cornelia Huck94bb0632006-06-29 15:08:41 +0200122/* Channel measurement facility related */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123void retry_set_schib(struct ccw_device *cdev);
Cornelia Huck94bb0632006-06-29 15:08:41 +0200124void cmf_retry_copy_block(struct ccw_device *);
125int cmf_reenable(struct ccw_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126#endif