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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/s390/cio/device.h | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/s390/cio/device.h')
-rw-r--r-- | drivers/s390/cio/device.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.h b/drivers/s390/cio/device.h new file mode 100644 index 0000000..a3aa056 --- /dev/null +++ b/drivers/s390/cio/device.h @@ -0,0 +1,115 @@ +#ifndef S390_DEVICE_H +#define S390_DEVICE_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_CLEAR_VERIFY, + DEV_STATE_TIMEOUT_KILL, + DEV_STATE_WAIT4IO, + DEV_STATE_QUIESCE, + /* special states for devices gone not operational */ + DEV_STATE_DISCONNECTED, + DEV_STATE_DISCONNECTED_SENSE_ID, + DEV_STATE_CMFCHANGE, + /* 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) +{ + dev_jumptable[cdev->private->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 struct workqueue_struct *ccw_device_work; +extern struct workqueue_struct *ccw_device_notify_work; + +void io_subchannel_recog_done(struct ccw_device *cdev); + +int ccw_device_cancel_halt_clear(struct ccw_device *); + +int ccw_device_register(struct ccw_device *); +void ccw_device_do_unreg_rereg(void *); +void ccw_device_call_sch_unregister(void *); + +int ccw_device_recognition(struct ccw_device *); +int ccw_device_online(struct ccw_device *); +int ccw_device_offline(struct ccw_device *); + +/* 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 prototypes for sense id stuff. */ +void ccw_device_sense_id_start(struct ccw_device *); +void ccw_device_sense_id_irq(struct ccw_device *, enum dev_event); +void ccw_device_sense_id_done(struct ccw_device *, int); + +/* Function prototypes for path grouping stuff. */ +void ccw_device_sense_pgid_start(struct ccw_device *); +void ccw_device_sense_pgid_irq(struct ccw_device *, enum dev_event); +void ccw_device_sense_pgid_done(struct ccw_device *, int); + +void ccw_device_verify_start(struct ccw_device *); +void ccw_device_verify_irq(struct ccw_device *, enum dev_event); +void ccw_device_verify_done(struct ccw_device *, int); + +void ccw_device_disband_start(struct ccw_device *); +void ccw_device_disband_irq(struct ccw_device *, enum dev_event); +void ccw_device_disband_done(struct ccw_device *, int); + +int ccw_device_call_handler(struct ccw_device *); + +int ccw_device_stlck(struct ccw_device *); + +/* qdio needs this. */ +void ccw_device_set_timeout(struct ccw_device *, int); + +void retry_set_schib(struct ccw_device *cdev); +#endif |