device.h revision a806170e29c5468b1d641a22518243bdf1b8d58b
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 */ 13enum 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_CLEAR_VERIFY, 25 DEV_STATE_TIMEOUT_KILL, 26 DEV_STATE_QUIESCE, 27 /* special states for devices gone not operational */ 28 DEV_STATE_DISCONNECTED, 29 DEV_STATE_DISCONNECTED_SENSE_ID, 30 DEV_STATE_CMFCHANGE, 31 DEV_STATE_CMFUPDATE, 32 /* last element! */ 33 NR_DEV_STATES 34}; 35 36/* 37 * asynchronous events of the device statemachine 38 */ 39enum 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 48struct ccw_device; 49 50/* 51 * action called through jumptable 52 */ 53typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); 54extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; 55 56static inline void 57dev_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 */ 65static inline int 66dev_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 74extern struct workqueue_struct *ccw_device_work; 75extern struct workqueue_struct *ccw_device_notify_work; 76extern wait_queue_head_t ccw_device_init_wq; 77extern atomic_t ccw_device_init_count; 78 79void io_subchannel_recog_done(struct ccw_device *cdev); 80 81int ccw_device_cancel_halt_clear(struct ccw_device *); 82 83void ccw_device_do_unreg_rereg(struct work_struct *); 84void ccw_device_move_to_orphanage(struct work_struct *); 85int ccw_device_is_orphan(struct ccw_device *); 86 87int ccw_device_recognition(struct ccw_device *); 88int ccw_device_online(struct ccw_device *); 89int ccw_device_offline(struct ccw_device *); 90 91void ccw_device_schedule_recovery(void); 92 93/* Function prototypes for device status and basic sense stuff. */ 94void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); 95void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); 96int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); 97int ccw_device_do_sense(struct ccw_device *, struct irb *); 98 99/* Function prototypes for sense id stuff. */ 100void ccw_device_sense_id_start(struct ccw_device *); 101void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event); 102void ccw_device_sense_id_done(struct ccw_device *, int); 103 104/* Function prototypes for path grouping stuff. */ 105void ccw_device_sense_pgid_start(struct ccw_device *); 106void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event); 107void ccw_device_sense_pgid_done(struct ccw_device *, int); 108 109void ccw_device_verify_start(struct ccw_device *); 110void ccw_device_verify_irq(struct ccw_device *, enum dev_event); 111void ccw_device_verify_done(struct ccw_device *, int); 112 113void ccw_device_disband_start(struct ccw_device *); 114void ccw_device_disband_irq(struct ccw_device *, enum dev_event); 115void ccw_device_disband_done(struct ccw_device *, int); 116 117int ccw_device_call_handler(struct ccw_device *); 118 119int ccw_device_stlck(struct ccw_device *); 120 121/* qdio needs this. */ 122void ccw_device_set_timeout(struct ccw_device *, int); 123extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); 124extern struct bus_type ccw_bus_type; 125 126/* Channel measurement facility related */ 127void retry_set_schib(struct ccw_device *cdev); 128void cmf_retry_copy_block(struct ccw_device *); 129int cmf_reenable(struct ccw_device *); 130extern struct device_attribute dev_attr_cmb_enable; 131#endif 132