#ifndef S390_DEVICE_H #define S390_DEVICE_H #include <asm/ccwdev.h> #include <linux/atomic.h> #include <linux/wait.h> #include <linux/notifier.h> #include <linux/kernel_stat.h> #include "io_sch.h" /* * states of the device statemachine */ enum dev_state { DEV_STATE_NOT_OPER, DEV_STATE_SENSE_PGID, DEV_STATE_SENSE_ID, DEV_STATE_OFFLINE, DEV_STATE_VERIFY, DEV_STATE_ONLINE, DEV_STATE_W4SENSE, DEV_STATE_DISBAND_PGID, DEV_STATE_BOXED, /* states to wait for i/o completion before doing something */ DEV_STATE_TIMEOUT_KILL, DEV_STATE_QUIESCE, /* special states for devices gone not operational */ DEV_STATE_DISCONNECTED, DEV_STATE_DISCONNECTED_SENSE_ID, DEV_STATE_CMFCHANGE, DEV_STATE_CMFUPDATE, DEV_STATE_STEAL_LOCK, /* last element! */ NR_DEV_STATES }; /* * asynchronous events of the device statemachine */ enum dev_event { DEV_EVENT_NOTOPER, DEV_EVENT_INTERRUPT, DEV_EVENT_TIMEOUT, DEV_EVENT_VERIFY, /* last element! */ NR_DEV_EVENTS }; struct ccw_device; /* * action called through jumptable */ typedef void (fsm_func_t)(struct ccw_device *, enum dev_event); extern fsm_func_t *dev_jumptable[NR_DEV_STATES][NR_DEV_EVENTS]; static inline void dev_fsm_event(struct ccw_device *cdev, enum dev_event dev_event) { int state = cdev->private->state; if (dev_event == DEV_EVENT_INTERRUPT) { if (state == DEV_STATE_ONLINE) kstat_cpu(smp_processor_id()). irqs[cdev->private->int_class]++; else if (state != DEV_STATE_CMFCHANGE && state != DEV_STATE_CMFUPDATE) kstat_cpu(smp_processor_id()).irqs[IOINT_CIO]++; } dev_jumptable[state][dev_event](cdev, dev_event); } /* * Delivers 1 if the device state is final. */ static inline int dev_fsm_final_state(struct ccw_device *cdev) { return (cdev->private->state == DEV_STATE_NOT_OPER || cdev->private->state == DEV_STATE_OFFLINE || cdev->private->state == DEV_STATE_ONLINE || cdev->private->state == DEV_STATE_BOXED); } extern wait_queue_head_t ccw_device_init_wq; extern atomic_t ccw_device_init_count; int __init io_subchannel_init(void); void io_subchannel_recog_done(struct ccw_device *cdev); void io_subchannel_init_config(struct subchannel *sch); int ccw_device_cancel_halt_clear(struct ccw_device *); int ccw_device_is_orphan(struct ccw_device *); void ccw_device_recognition(struct ccw_device *); int ccw_device_online(struct ccw_device *); int ccw_device_offline(struct ccw_device *); void ccw_device_update_sense_data(struct ccw_device *); int ccw_device_test_sense_data(struct ccw_device *); void ccw_device_schedule_sch_unregister(struct ccw_device *); int ccw_purge_blacklisted(void); void ccw_device_sched_todo(struct ccw_device *cdev, enum cdev_todo todo); /* Function prototypes for device status and basic sense stuff. */ void ccw_device_accumulate_irb(struct ccw_device *, struct irb *); void ccw_device_accumulate_basic_sense(struct ccw_device *, struct irb *); int ccw_device_accumulate_and_sense(struct ccw_device *, struct irb *); int ccw_device_do_sense(struct ccw_device *, struct irb *); /* Function prototype for internal request handling. */ int lpm_adjust(int lpm, int mask); void ccw_request_start(struct ccw_device *); int ccw_request_cancel(struct ccw_device *cdev); void ccw_request_handler(struct ccw_device *cdev); void ccw_request_timeout(struct ccw_device *cdev); void ccw_request_notoper(struct ccw_device *cdev); /* Function prototypes for sense id stuff. */ void ccw_device_sense_id_start(struct ccw_device *); void ccw_device_sense_id_done(struct ccw_device *, int); /* Function prototypes for path grouping stuff. */ void ccw_device_verify_start(struct ccw_device *); void ccw_device_verify_done(struct ccw_device *, int); void ccw_device_disband_start(struct ccw_device *); void ccw_device_disband_done(struct ccw_device *, int); void ccw_device_stlck_start(struct ccw_device *, void *, void *, void *); void ccw_device_stlck_done(struct ccw_device *, void *, int); int ccw_device_call_handler(struct ccw_device *); int ccw_device_stlck(struct ccw_device *); /* Helper function for machine check handling. */ void ccw_device_trigger_reprobe(struct ccw_device *); void ccw_device_kill_io(struct ccw_device *); int ccw_device_notify(struct ccw_device *, int); void ccw_device_set_disconnected(struct ccw_device *cdev); void ccw_device_set_notoper(struct ccw_device *cdev); /* qdio needs this. */ void ccw_device_set_timeout(struct ccw_device *, int); extern struct subchannel_id ccw_device_get_subchannel_id(struct ccw_device *); /* Channel measurement facility related */ void retry_set_schib(struct ccw_device *cdev); void cmf_retry_copy_block(struct ccw_device *); int cmf_reenable(struct ccw_device *); int ccw_set_cmf(struct ccw_device *cdev, int enable); extern struct device_attribute dev_attr_cmb_enable; #endif