linux_dsm_epyc7002/drivers/s390/cio/device.h
Peter Oberparleiter de400d6b78 [S390] fix mismatch in summation of I/O IRQ statistics
Current IRQ statistics support does not show detail counts for I/O
interrupts which are processed internally only. The result is a
summation count which is way off such as this one:

           CPU0       CPU1       CPU2
I/O:       1331        710        442
[...]
QAI:         15         16         16   [I/O] QDIO Adapter Interrupt
QDI:          1          0          0   [I/O] QDIO Interrupt
DAS:        706        645        381   [I/O] DASD
C15:         26         10          0   [I/O] 3215
C70:          0          0          0   [I/O] 3270
TAP:          0          0          0   [I/O] Tape
VMR:          0          0          0   [I/O] Unit Record Devices
LCS:          0          0          0   [I/O] LCS
CLW:          0          0          0   [I/O] CLAW
CTC:          0          0          0   [I/O] CTC
APB:          0          0          0   [I/O] AP Bus

Fix this by moving I/O interrupt accounting into the common I/O layer.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2011-10-30 15:16:15 +01:00

155 lines
4.7 KiB
C

#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