1 #ifndef S390_DEVICE_H 2 #define S390_DEVICE_H 3 4 #include <asm/ccwdev.h> 5 #include <asm/atomic.h> 6 #include <linux/wait.h> 7 8 /* 9 * states of the device statemachine 10 */ 11 enum 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, 30 DEV_STATE_CMFUPDATE, 31 /* last element! */ 32 NR_DEV_STATES 33 }; 34 35 /* 36 * asynchronous events of the device statemachine 37 */ 38 enum 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 47 struct ccw_device; 48 49 /* 50 * action called through jumptable 51 */ 52 typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); 53 extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; 54 55 static inline void 56 dev_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 */ 64 static inline int 65 dev_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 73 extern struct workqueue_struct *ccw_device_work; 74 extern struct workqueue_struct *ccw_device_notify_work; 75 extern wait_queue_head_t ccw_device_init_wq; 76 extern atomic_t ccw_device_init_count; 77 78 void io_subchannel_recog_done(struct ccw_device *cdev); 79 80 int ccw_device_cancel_halt_clear(struct ccw_device *); 81 82 int ccw_device_register(struct ccw_device *); 83 void ccw_device_do_unreg_rereg(void *); 84 void ccw_device_call_sch_unregister(void *); 85 86 int ccw_device_recognition(struct ccw_device *); 87 int ccw_device_online(struct ccw_device *); 88 int ccw_device_offline(struct ccw_device *); 89 90 /* Function prototypes for device status and basic sense stuff. */ 91 void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); 92 void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); 93 int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); 94 int ccw_device_do_sense(struct ccw_device *, struct irb *); 95 96 /* Function prototypes for sense id stuff. */ 97 void ccw_device_sense_id_start(struct ccw_device *); 98 void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event); 99 void ccw_device_sense_id_done(struct ccw_device *, int); 100 101 /* Function prototypes for path grouping stuff. */ 102 void ccw_device_sense_pgid_start(struct ccw_device *); 103 void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event); 104 void ccw_device_sense_pgid_done(struct ccw_device *, int); 105 106 void ccw_device_verify_start(struct ccw_device *); 107 void ccw_device_verify_irq(struct ccw_device *, enum dev_event); 108 void ccw_device_verify_done(struct ccw_device *, int); 109 110 void ccw_device_disband_start(struct ccw_device *); 111 void ccw_device_disband_irq(struct ccw_device *, enum dev_event); 112 void ccw_device_disband_done(struct ccw_device *, int); 113 114 int ccw_device_call_handler(struct ccw_device *); 115 116 int ccw_device_stlck(struct ccw_device *); 117 118 /* qdio needs this. */ 119 void ccw_device_set_timeout(struct ccw_device *, int); 120 extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); 121 122 /* Channel measurement facility related */ 123 void retry_set_schib(struct ccw_device *cdev); 124 void cmf_retry_copy_block(struct ccw_device *); 125 int cmf_reenable(struct ccw_device *); 126 #endif 127