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 /* 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 wait_queue_head_t ccw_device_init_wq; 75 extern atomic_t ccw_device_init_count; 76 int __init io_subchannel_init(void); 77 78 void io_subchannel_recog_done(struct ccw_device *cdev); 79 void io_subchannel_init_config(struct subchannel *sch); 80 81 int ccw_device_cancel_halt_clear(struct ccw_device *); 82 83 int ccw_device_is_orphan(struct ccw_device *); 84 85 void ccw_device_recognition(struct ccw_device *); 86 int ccw_device_online(struct ccw_device *); 87 int ccw_device_offline(struct ccw_device *); 88 void ccw_device_update_sense_data(struct ccw_device *); 89 int ccw_device_test_sense_data(struct ccw_device *); 90 void ccw_device_schedule_sch_unregister(struct ccw_device *); 91 int ccw_purge_blacklisted(void); 92 void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo); 93 94 /* Function prototypes for device status and basic sense stuff. */ 95 void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); 96 void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); 97 int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); 98 int ccw_device_do_sense(struct ccw_device *, struct irb *); 99 100 /* Function prototype for internal request handling. */ 101 int lpm_adjust(int lpm, int mask); 102 void ccw_request_start(struct ccw_device *); 103 int ccw_request_cancel(struct ccw_device *cdev); 104 void ccw_request_handler(struct ccw_device *cdev); 105 void ccw_request_timeout(struct ccw_device *cdev); 106 void ccw_request_notoper(struct ccw_device *cdev); 107 108 /* Function prototypes for sense id stuff. */ 109 void ccw_device_sense_id_start(struct ccw_device *); 110 void ccw_device_sense_id_done(struct ccw_device *, int); 111 112 /* Function prototypes for path grouping stuff. */ 113 void ccw_device_sense_pgid_start(struct ccw_device *); 114 void ccw_device_sense_pgid_done(struct ccw_device *, int); 115 116 void ccw_device_verify_start(struct ccw_device *); 117 void ccw_device_verify_done(struct ccw_device *, int); 118 119 void ccw_device_disband_start(struct ccw_device *); 120 void ccw_device_disband_done(struct ccw_device *, int); 121 122 int ccw_device_call_handler(struct ccw_device *); 123 124 int ccw_device_stlck(struct ccw_device *); 125 126 /* Helper function for machine check handling. */ 127 void ccw_device_trigger_reprobe(struct ccw_device *); 128 void ccw_device_kill_io(struct ccw_device *); 129 int ccw_device_notify(struct ccw_device *, int); 130 void ccw_device_set_disconnected(struct ccw_device *cdev); 131 void ccw_device_set_notoper(struct ccw_device *cdev); 132 133 /* qdio needs this. */ 134 void ccw_device_set_timeout(struct ccw_device *, int); 135 extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); 136 extern struct bus_type ccw_bus_type; 137 138 /* Channel measurement facility related */ 139 void retry_set_schib(struct ccw_device *cdev); 140 void cmf_retry_copy_block(struct ccw_device *); 141 int cmf_reenable(struct ccw_device *); 142 int ccw_set_cmf(struct ccw_device *cdev, int enable); 143 extern struct device_attribute dev_attr_cmb_enable; 144 #endif 145