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_QUIESCE, 25 /* special states for devices gone not operational */ 26 DEV_STATE_DISCONNECTED, 27 DEV_STATE_DISCONNECTED_SENSE_ID, 28 DEV_STATE_CMFCHANGE, 29 DEV_STATE_CMFUPDATE, 30 /* last element! */ 31 NR_DEV_STATES 32 }; 33 34 /* 35 * asynchronous events of the device statemachine 36 */ 37 enum dev_event { 38 DEV_EVENT_NOTOPER, 39 DEV_EVENT_INTERRUPT, 40 DEV_EVENT_TIMEOUT, 41 DEV_EVENT_VERIFY, 42 /* last element! */ 43 NR_DEV_EVENTS 44 }; 45 46 struct ccw_device; 47 48 /* 49 * action called through jumptable 50 */ 51 typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); 52 extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; 53 54 static inline void 55 dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) 56 { 57 dev_jumptable[cdev->private->state][dev_event](cdev, dev_event); 58 } 59 60 /* 61 * Delivers 1 if the device state is final. 62 */ 63 static inline int 64 dev_fsm_final_state(struct ccw_device *cdev) 65 { 66 return (cdev->private->state == DEV_STATE_NOT_OPER || 67 cdev->private->state == DEV_STATE_OFFLINE || 68 cdev->private->state == DEV_STATE_ONLINE || 69 cdev->private->state == DEV_STATE_BOXED); 70 } 71 72 extern struct workqueue_struct *ccw_device_work; 73 extern struct workqueue_struct *ccw_device_notify_work; 74 extern wait_queue_head_t ccw_device_init_wq; 75 extern atomic_t ccw_device_init_count; 76 77 void io_subchannel_irq (struct device *pdev); 78 void io_subchannel_recog_done(struct ccw_device *cdev); 79 80 int ccw_device_cancel_halt_clear(struct ccw_device *); 81 82 void ccw_device_do_unreg_rereg(struct work_struct *); 83 void ccw_device_call_sch_unregister(struct work_struct *); 84 void ccw_device_move_to_orphanage(struct work_struct *); 85 int ccw_device_is_orphan(struct ccw_device *); 86 87 int ccw_device_recognition(struct ccw_device *); 88 int ccw_device_online(struct ccw_device *); 89 int ccw_device_offline(struct ccw_device *); 90 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 *); 96 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); 101 102 /* 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); 106 107 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); 110 111 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); 114 115 int ccw_device_call_handler(struct ccw_device *); 116 117 int ccw_device_stlck(struct ccw_device *); 118 119 /* qdio needs this. */ 120 void ccw_device_set_timeout(struct ccw_device *, int); 121 extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); 122 extern struct bus_type ccw_bus_type; 123 124 /* Channel measurement facility related */ 125 void retry_set_schib(struct ccw_device *cdev); 126 void cmf_retry_copy_block(struct ccw_device *); 127 int cmf_reenable(struct ccw_device *); 128 #endif 129