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/* $OpenBSD: subr_suspend.c,v 1.12 2022/09/03 18:05:10 kettenis Exp $ */
/*
* Copyright (c) 2005 Thorsten Lockert <tholo@sigmasoft.com>
* Copyright (c) 2005 Jordan Hargrave <jordan@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/reboot.h>
#include <sys/sensors.h>
#include <sys/sysctl.h>
#include <sys/mount.h>
#include <sys/syscallargs.h>
#include <dev/wscons/wsdisplayvar.h>
#ifdef HIBERNATE
#include <sys/hibernate.h>
#endif
#include "softraid.h"
#include "wsdisplay.h"
/* Number of (active) wakeup devices in the system. */
u_int wakeup_devices;
void
device_register_wakeup(struct device *dev)
{
wakeup_devices++;
}
int
sleep_state(void *v, int sleepmode)
{
int error, s;
extern int perflevel;
size_t rndbuflen;
char *rndbuf;
#if NSOFTRAID > 0
extern void sr_quiesce(void);
#endif
top:
error = ENXIO;
rndbuf = NULL;
rndbuflen = 0;
if (sleepmode == SLEEP_SUSPEND && wakeup_devices == 0)
return EOPNOTSUPP;
if (sleep_showstate(v, sleepmode))
return EOPNOTSUPP;
#if NWSDISPLAY > 0
wsdisplay_suspend();
#endif
stop_periodic_resettodr();
#ifdef HIBERNATE
if (sleepmode == SLEEP_HIBERNATE) {
/*
* Discard useless memory to reduce fragmentation,
* and attempt to create a hibernate work area
*/
hibernate_suspend_bufcache();
uvmpd_hibernate();
if (hibernate_alloc()) {
printf("failed to allocate hibernate memory\n");
sleep_abort(v);
error = ENOMEM;
goto fail_hiballoc;
}
}
#endif /* HIBERNATE */
sensor_quiesce();
if (config_suspend_all(DVACT_QUIESCE)) {
sleep_abort(v);
error = EIO;
goto fail_quiesce;
}
vfs_stall(curproc, 1);
#if NSOFTRAID > 0
sr_quiesce();
#endif
bufq_quiesce();
#ifdef MULTIPROCESSOR
sched_stop_secondary_cpus();
KASSERT(CPU_IS_PRIMARY(curcpu()));
sleep_mp();
#endif
#ifdef HIBERNATE
if (sleepmode == SLEEP_HIBERNATE) {
/*
* We've just done various forms of syncing to disk
* churned lots of memory dirty. We don't need to
* save that dirty memory to hibernate, so release it.
*/
hibernate_suspend_bufcache();
uvmpd_hibernate();
}
#endif /* HIBERNATE */
resettodr();
s = splhigh();
intr_disable(); /* PSL_I for resume; PIC/APIC broken until repair */
cold = 2; /* Force other code to delay() instead of tsleep() */
if (config_suspend_all(DVACT_SUSPEND) != 0) {
sleep_abort(v);
error = EDEADLK;
goto fail_suspend;
}
suspend_randomness();
if (sleep_setstate(v)) {
sleep_abort(v);
error = ENOTBLK;
goto fail_pts;
}
if (sleepmode == SLEEP_SUSPEND) {
/*
* XXX
* Flag to disk drivers that they should "power down" the disk
* when we get to DVACT_POWERDOWN.
*/
boothowto |= RB_POWERDOWN;
config_suspend_all(DVACT_POWERDOWN);
boothowto &= ~RB_POWERDOWN;
}
error = gosleep(v);
#ifdef HIBERNATE
if (sleepmode == SLEEP_HIBERNATE) {
uvm_pmr_dirty_everything();
hib_getentropy(&rndbuf, &rndbuflen);
}
#endif /* HIBERNATE */
fail_pts:
config_suspend_all(DVACT_RESUME);
fail_suspend:
cold = 0;
intr_enable();
splx(s);
inittodr(gettime());
sleep_resume(v);
resume_randomness(rndbuf, rndbuflen);
#ifdef MULTIPROCESSOR
resume_mp();
sched_start_secondary_cpus();
#endif
vfs_stall(curproc, 0);
bufq_restart();
fail_quiesce:
config_suspend_all(DVACT_WAKEUP);
sensor_restart();
#ifdef HIBERNATE
if (sleepmode == SLEEP_HIBERNATE) {
hibernate_free();
fail_hiballoc:
hibernate_resume_bufcache();
}
#endif /* HIBERNATE */
start_periodic_resettodr();
#if NWSDISPLAY > 0
wsdisplay_resume();
#endif
sys_sync(curproc, NULL, NULL);
if (cpu_setperf != NULL)
cpu_setperf(perflevel); /* Restore hw.setperf */
if (suspend_finish(v) == EAGAIN)
goto top;
return (error);
}
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