2017-11-01 14:08:43 +00:00
|
|
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
2012-10-09 08:47:31 +00:00
|
|
|
#ifndef _UAPIS390_CMB_H
|
|
|
|
|
#define _UAPIS390_CMB_H
|
|
|
|
|
|
|
|
|
|
#include <linux/types.h>
|
|
|
|
|
|
|
|
|
|
/**
|
|
|
|
|
* struct cmbdata - channel measurement block data for user space
|
|
|
|
|
* @size: size of the stored data
|
|
|
|
|
* @elapsed_time: time since last sampling
|
|
|
|
|
* @ssch_rsch_count: number of ssch and rsch
|
|
|
|
|
* @sample_count: number of samples
|
|
|
|
|
* @device_connect_time: time of device connect
|
|
|
|
|
* @function_pending_time: time of function pending
|
|
|
|
|
* @device_disconnect_time: time of device disconnect
|
|
|
|
|
* @control_unit_queuing_time: time of control unit queuing
|
|
|
|
|
* @device_active_only_time: time of device active only
|
|
|
|
|
* @device_busy_time: time of device busy (ext. format)
|
|
|
|
|
* @initial_command_response_time: initial command response time (ext. format)
|
|
|
|
|
*
|
|
|
|
|
* All values are stored as 64 bit for simplicity, especially
|
|
|
|
|
* in 32 bit emulation mode. All time values are normalized to
|
|
|
|
|
* nanoseconds.
|
|
|
|
|
* Currently, two formats are known, which differ by the size of
|
|
|
|
|
* this structure, i.e. the last two members are only set when
|
|
|
|
|
* the extended channel measurement facility (first shipped in
|
|
|
|
|
* z990 machines) is activated.
|
|
|
|
|
* Potentially, more fields could be added, which would result in a
|
|
|
|
|
* new ioctl number.
|
|
|
|
|
*/
|
|
|
|
|
struct cmbdata {
|
|
|
|
|
__u64 size;
|
|
|
|
|
__u64 elapsed_time;
|
|
|
|
|
/* basic and exended format: */
|
|
|
|
|
__u64 ssch_rsch_count;
|
|
|
|
|
__u64 sample_count;
|
|
|
|
|
__u64 device_connect_time;
|
|
|
|
|
__u64 function_pending_time;
|
|
|
|
|
__u64 device_disconnect_time;
|
|
|
|
|
__u64 control_unit_queuing_time;
|
|
|
|
|
__u64 device_active_only_time;
|
|
|
|
|
/* extended format only: */
|
|
|
|
|
__u64 device_busy_time;
|
|
|
|
|
__u64 initial_command_response_time;
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
/* enable channel measurement */
|
|
|
|
|
#define BIODASDCMFENABLE _IO(DASD_IOCTL_LETTER, 32)
|
|
|
|
|
/* enable channel measurement */
|
|
|
|
|
#define BIODASDCMFDISABLE _IO(DASD_IOCTL_LETTER, 33)
|
|
|
|
|
/* read channel measurement data */
|
|
|
|
|
#define BIODASDREADALLCMB _IOWR(DASD_IOCTL_LETTER, 33, struct cmbdata)
|
|
|
|
|
|
|
|
|
|
#endif /* _UAPIS390_CMB_H */
|
