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_TIMEOUT_KILL,
26 /* special states for devices gone not operational */
27 DEV_STATE_DISCONNECTED,
28 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 wait_queue_head_t ccw_device_init_wq;
76 extern atomic_t ccw_device_init_count;
77 int __init io_subchannel_init(void);
79 void io_subchannel_recog_done(struct ccw_device *cdev);
80 void io_subchannel_init_config(struct subchannel *sch);
82 int ccw_device_cancel_halt_clear(struct ccw_device *);
84 int ccw_device_is_orphan(struct ccw_device *);
86 void ccw_device_recognition(struct ccw_device *);
87 int ccw_device_online(struct ccw_device *);
88 int ccw_device_offline(struct ccw_device *);
89 void ccw_device_update_sense_data(struct ccw_device *);
90 int ccw_device_test_sense_data(struct ccw_device *);
91 void ccw_device_schedule_sch_unregister(struct ccw_device *);
92 int ccw_purge_blacklisted(void);
93 void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo);
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 *);
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);
109 /* Function prototypes for sense id stuff. */
110 void ccw_device_sense_id_start(struct ccw_device *);
111 void ccw_device_sense_id_done(struct ccw_device *, int);
113 /* Function prototypes for path grouping stuff. */
114 void ccw_device_verify_start(struct ccw_device *);
115 void ccw_device_verify_done(struct ccw_device *, int);
117 void ccw_device_disband_start(struct ccw_device *);
118 void ccw_device_disband_done(struct ccw_device *, int);
120 void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *);
121 void ccw_device_stlck_done(struct ccw_device *, void *, int);
123 int ccw_device_call_handler(struct ccw_device *);
125 int ccw_device_stlck(struct ccw_device *);
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);
131 void ccw_device_set_disconnected(struct ccw_device *cdev);
132 void ccw_device_set_notoper(struct ccw_device *cdev);
134 /* qdio needs this. */
135 void ccw_device_set_timeout(struct ccw_device *, int);
136 extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *);
137 extern struct bus_type ccw_bus_type;
139 /* Channel measurement facility related */
140 void retry_set_schib(struct ccw_device *cdev);
141 void cmf_retry_copy_block(struct ccw_device *);
142 int cmf_reenable(struct ccw_device *);
143 int ccw_set_cmf(struct ccw_device *cdev, int enable);
144 extern struct device_attribute dev_attr_cmb_enable;