4 #include <asm/ccwdev.h>
5 #include <asm/atomic.h>
6 #include <linux/wait.h>
11 * states of the device statemachine
21 DEV_STATE_DISBAND_PGID,
23 /* states to wait for i/o completion before doing something */
24 DEV_STATE_CLEAR_VERIFY,
25 DEV_STATE_TIMEOUT_KILL,
27 /* special states for devices gone not operational */
28 DEV_STATE_DISCONNECTED,
29 DEV_STATE_DISCONNECTED_SENSE_ID,
37 * asynchronous events of the device statemachine
51 * action called through jumptable
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];
57 dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event)
59 dev_jumptable[cdev->private->state][dev_event](cdev, dev_event);
63 * Delivers 1 if the device state is final.
66 dev_fsm_final_state(struct ccw_device *cdev)
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);
74 extern struct workqueue_struct *ccw_device_work;
75 extern struct workqueue_struct *ccw_device_notify_work;
76 extern wait_queue_head_t ccw_device_init_wq;
77 extern atomic_t ccw_device_init_count;
79 void io_subchannel_recog_done(struct ccw_device *cdev);
81 int ccw_device_cancel_halt_clear(struct ccw_device *);
83 void ccw_device_do_unreg_rereg(struct work_struct *);
84 void ccw_device_move_to_orphanage(struct work_struct *);
85 int ccw_device_is_orphan(struct ccw_device *);
87 int ccw_device_recognition(struct ccw_device *);
88 int ccw_device_online(struct ccw_device *);
89 int ccw_device_offline(struct ccw_device *);
91 /* Function prototypes for device status and basic sense stuff. */
92 void ccw_device_accumulate_irb(struct ccw_device *, struct irb *);
93 void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *);
94 int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *);
95 int ccw_device_do_sense(struct ccw_device *, struct irb *);
97 /* Function prototypes for sense id stuff. */
98 void ccw_device_sense_id_start(struct ccw_device *);
99 void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event);
100 void ccw_device_sense_id_done(struct ccw_device *, int);
102 /* Function prototypes for path grouping stuff. */
103 void ccw_device_sense_pgid_start(struct ccw_device *);
104 void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event);
105 void ccw_device_sense_pgid_done(struct ccw_device *, int);
107 void ccw_device_verify_start(struct ccw_device *);
108 void ccw_device_verify_irq(struct ccw_device *, enum dev_event);
109 void ccw_device_verify_done(struct ccw_device *, int);
111 void ccw_device_disband_start(struct ccw_device *);
112 void ccw_device_disband_irq(struct ccw_device *, enum dev_event);
113 void ccw_device_disband_done(struct ccw_device *, int);
115 int ccw_device_call_handler(struct ccw_device *);
117 int ccw_device_stlck(struct ccw_device *);
119 /* Helper function for machine check handling. */
120 void ccw_device_trigger_reprobe(struct ccw_device *);
121 void ccw_device_kill_io(struct ccw_device *);
122 int ccw_device_notify(struct ccw_device *, int);
124 /* qdio needs this. */
125 void ccw_device_set_timeout(struct ccw_device *, int);
126 extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *);
127 extern struct bus_type ccw_bus_type;
129 /* Channel measurement facility related */
130 void retry_set_schib(struct ccw_device *cdev);
131 void cmf_retry_copy_block(struct ccw_device *);
132 int cmf_reenable(struct ccw_device *);
133 extern struct device_attribute dev_attr_cmb_enable;