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 #include "io_sch.h" 9 10 /* 11 * states of the device statemachine 12 */ 13 enum dev_state { 14 DEV_STATE_NOT_OPER, 15 DEV_STATE_SENSE_PGID, 16 DEV_STATE_SENSE_ID, 17 DEV_STATE_OFFLINE, 18 DEV_STATE_VERIFY, 19 DEV_STATE_ONLINE, 20 DEV_STATE_W4SENSE, 21 DEV_STATE_DISBAND_PGID, 22 DEV_STATE_BOXED, 23 /* states to wait for i/o completion before doing something */ 24 DEV_STATE_TIMEOUT_KILL, 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 DEV_STATE_STEAL_LOCK, 32 /* last element! */ 33 NR_DEV_STATES 34 }; 35 36 /* 37 * asynchronous events of the device statemachine 38 */ 39 enum dev_event { 40 DEV_EVENT_NOTOPER, 41 DEV_EVENT_INTERRUPT, 42 DEV_EVENT_TIMEOUT, 43 DEV_EVENT_VERIFY, 44 /* last element! */ 45 NR_DEV_EVENTS 46 }; 47 48 struct ccw_device; 49 50 /* 51 * action called through jumptable 52 */ 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]; 55 56 static inline void 57 dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) 58 { 59 dev_jumptable[cdev->private->state][dev_event](cdev, dev_event); 60 } 61 62 /* 63 * Delivers 1 if the device state is final. 64 */ 65 static inline int 66 dev_fsm_final_state(struct ccw_device *cdev) 67 { 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); 72 } 73 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); 78 79 void io_subchannel_recog_done(struct ccw_device *cdev); 80 void io_subchannel_init_config(struct subchannel *sch); 81 82 int ccw_device_cancel_halt_clear(struct ccw_device *); 83 84 int ccw_device_is_orphan(struct ccw_device *); 85 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); 94 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 *); 100 101 /* 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); 108 109 /* 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); 112 113 /* 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); 116 117 void ccw_device_disband_start(struct ccw_device *); 118 void ccw_device_disband_done(struct ccw_device *, int); 119 120 void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *); 121 void ccw_device_stlck_done(struct ccw_device *, void *, int); 122 123 int ccw_device_call_handler(struct ccw_device *); 124 125 int ccw_device_stlck(struct ccw_device *); 126 127 /* 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); 133 134 /* 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; 138 139 /* 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; 145 #endif 146