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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#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 */

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Kbuild File 321 B 0644
auxvec.h File 214 B 0644
bitsperlong.h File 293 B 0644
bpf_perf_event.h File 226 B 0644
byteorder.h File 188 B 0644
chpid.h File 456 B 0644
chsc.h File 2.96 KB 0644
clp.h File 549 B 0644
cmb.h File 1.87 KB 0644
dasd.h File 12.4 KB 0644
debug.h File 857 B 0644
guarded_storage.h File 1.18 KB 0644
hypfs.h File 1.35 KB 0644
ioctls.h File 191 B 0644
ipcbuf.h File 738 B 0644
kvm.h File 7.73 KB 0644
kvm_para.h File 224 B 0644
kvm_perf.h File 474 B 0644
monwriter.h File 939 B 0644
msgbuf.h File 1.14 KB 0644
perf_regs.h File 887 B 0644
pkey.h File 4.35 KB 0644
posix_types.h File 1.4 KB 0644
ptrace.h File 11.39 KB 0644
qeth.h File 3.05 KB 0644
schid.h File 332 B 0644
sclp_ctl.h File 465 B 0644
sembuf.h File 864 B 0644
setup.h File 292 B 0644
shmbuf.h File 1.34 KB 0644
sie.h File 9.25 KB 0644
sigcontext.h File 1.73 KB 0644
siginfo.h File 302 B 0644
signal.h File 3.26 KB 0644
socket.h File 2.24 KB 0644
stat.h File 2.9 KB 0644
statfs.h File 1.03 KB 0644
sthyi.h File 178 B 0644
tape390.h File 2.76 KB 0644
termios.h File 1.14 KB 0644
types.h File 525 B 0644
ucontext.h File 1.18 KB 0644
unistd.h File 12.32 KB 0644
virtio-ccw.h File 444 B 0644
vmcp.h File 737 B 0644
vtoc.h File 7.36 KB 0644
zcrypt.h File 10.94 KB 0644