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NetBSD/sys/dev/sysmon/sysmon_power.c

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/* $NetBSD: sysmon_power.c,v 1.57 2015/12/14 01:08:47 pgoyette Exp $ */
/*-
* Copyright (c) 2007 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Copyright (c) 2003 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Power management framework for sysmon.
*
* We defer to a power management daemon running in userspace, since
* power management is largely a policy issue. This merely provides
* for power management event notification to that daemon.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sysmon_power.c,v 1.57 2015/12/14 01:08:47 pgoyette Exp $");
#ifdef _KERNEL_OPT
#include "opt_compat_netbsd.h"
#endif
#include <sys/param.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/vnode.h>
#include <sys/condvar.h>
#include <sys/mutex.h>
#include <sys/kmem.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/rndsource.h>
#include <sys/module.h>
#include <sys/once.h>
#include <dev/sysmon/sysmonvar.h>
#include <prop/proplib.h>
MODULE(MODULE_CLASS_DRIVER, sysmon_power, "sysmon");
/*
* Singly linked list for dictionaries to be stored/sent.
*/
struct power_event_dictionary {
SIMPLEQ_ENTRY(power_event_dictionary) pev_dict_head;
prop_dictionary_t dict;
int flags;
};
struct power_event_description {
int type;
const char *desc;
};
/*
* Available events for power switches.
*/
static const struct power_event_description pswitch_event_desc[] = {
{ PSWITCH_EVENT_PRESSED, "pressed" },
{ PSWITCH_EVENT_RELEASED, "released" },
{ -1, NULL }
};
/*
* Available script names for power switches.
*/
static const struct power_event_description pswitch_type_desc[] = {
{ PSWITCH_TYPE_POWER, "power_button" },
{ PSWITCH_TYPE_SLEEP, "sleep_button" },
{ PSWITCH_TYPE_LID, "lid_switch" },
{ PSWITCH_TYPE_RESET, "reset_button" },
{ PSWITCH_TYPE_ACADAPTER, "acadapter" },
{ PSWITCH_TYPE_HOTKEY, "hotkey_button" },
{ PSWITCH_TYPE_RADIO, "radio_button" },
{ -1, NULL }
};
/*
* Available events for envsys(4).
*/
static const struct power_event_description penvsys_event_desc[] = {
{ PENVSYS_EVENT_NORMAL, "normal" },
{ PENVSYS_EVENT_CRITICAL, "critical" },
{ PENVSYS_EVENT_CRITOVER, "critical-over" },
{ PENVSYS_EVENT_CRITUNDER, "critical-under" },
{ PENVSYS_EVENT_WARNOVER, "warning-over" },
{ PENVSYS_EVENT_WARNUNDER, "warning-under" },
{ PENVSYS_EVENT_BATT_CRIT, "critical-capacity" },
{ PENVSYS_EVENT_BATT_WARN, "warning-capacity" },
{ PENVSYS_EVENT_BATT_HIGH, "high-capacity" },
{ PENVSYS_EVENT_BATT_MAX, "maximum-capacity" },
{ PENVSYS_EVENT_STATE_CHANGED, "state-changed" },
{ PENVSYS_EVENT_LOW_POWER, "low-power" },
{ -1, NULL }
};
/*
* Available script names for envsys(4).
*/
static const struct power_event_description penvsys_type_desc[] = {
{ PENVSYS_TYPE_BATTERY, "sensor_battery" },
{ PENVSYS_TYPE_DRIVE, "sensor_drive" },
{ PENVSYS_TYPE_FAN, "sensor_fan" },
{ PENVSYS_TYPE_INDICATOR, "sensor_indicator" },
{ PENVSYS_TYPE_POWER, "sensor_power" },
{ PENVSYS_TYPE_RESISTANCE, "sensor_resistance" },
{ PENVSYS_TYPE_TEMP, "sensor_temperature" },
{ PENVSYS_TYPE_VOLTAGE, "sensor_voltage" },
{ -1, NULL }
};
#define SYSMON_MAX_POWER_EVENTS 32
#define SYSMON_POWER_DICTIONARY_BUSY 0x01
#define SYSMON_POWER_DICTIONARY_READY 0x02
static power_event_t sysmon_power_event_queue[SYSMON_MAX_POWER_EVENTS];
static int sysmon_power_event_queue_head;
static int sysmon_power_event_queue_tail;
static int sysmon_power_event_queue_count;
static krndsource_t sysmon_rndsource;
static SIMPLEQ_HEAD(, power_event_dictionary) pev_dict_list =
SIMPLEQ_HEAD_INITIALIZER(pev_dict_list);
static struct selinfo sysmon_power_event_queue_selinfo;
static struct lwp *sysmon_power_daemon;
static kmutex_t sysmon_power_event_queue_mtx;
static kcondvar_t sysmon_power_event_queue_cv;
static char sysmon_power_type[32];
static int sysmon_power_make_dictionary(prop_dictionary_t, void *, int, int);
static int sysmon_power_daemon_task(struct power_event_dictionary *,
void *, int);
static void sysmon_power_destroy_dictionary(struct power_event_dictionary *);
static struct sysmon_opvec sysmon_power_opvec = {
sysmonopen_power, sysmonclose_power, sysmonioctl_power,
sysmonread_power, sysmonpoll_power, sysmonkqfilter_power
};
#define SYSMON_NEXT_EVENT(x) (((x) + 1) % SYSMON_MAX_POWER_EVENTS)
ONCE_DECL(once_power);
static int
power_preinit(void)
{
mutex_init(&sysmon_power_event_queue_mtx, MUTEX_DEFAULT, IPL_NONE);
cv_init(&sysmon_power_event_queue_cv, "smpower");
return 0;
}
/*
* sysmon_power_init:
*
* Initializes the mutexes and condition variables in the
* boot process via module initialization process.
*/
int
sysmon_power_init(void)
{
int error;
(void)RUN_ONCE(&once_power, power_preinit);
selinit(&sysmon_power_event_queue_selinfo);
rnd_attach_source(&sysmon_rndsource, "system-power",
RND_TYPE_POWER, RND_FLAG_DEFAULT);
error = sysmon_attach_minor(SYSMON_MINOR_POWER, &sysmon_power_opvec);
return error;
}
int
sysmon_power_fini(void)
{
int error;
if (sysmon_power_daemon != NULL)
error = EBUSY;
else
error = sysmon_attach_minor(SYSMON_MINOR_POWER, NULL);
if (error == 0) {
rnd_detach_source(&sysmon_rndsource);
seldestroy(&sysmon_power_event_queue_selinfo);
cv_destroy(&sysmon_power_event_queue_cv);
mutex_destroy(&sysmon_power_event_queue_mtx);
}
return error;
}
/*
* sysmon_queue_power_event:
*
* Enqueue a power event for the power management daemon. Returns
* non-zero if we were able to enqueue a power event.
*/
static int
sysmon_queue_power_event(power_event_t *pev)
{
KASSERT(mutex_owned(&sysmon_power_event_queue_mtx));
if (sysmon_power_event_queue_count == SYSMON_MAX_POWER_EVENTS)
return 0;
sysmon_power_event_queue[sysmon_power_event_queue_head] = *pev;
sysmon_power_event_queue_head =
SYSMON_NEXT_EVENT(sysmon_power_event_queue_head);
sysmon_power_event_queue_count++;
return 1;
}
/*
* sysmon_get_power_event:
*
* Get a power event from the queue. Returns non-zero if there
* is an event available.
*/
static int
sysmon_get_power_event(power_event_t *pev)
{
KASSERT(mutex_owned(&sysmon_power_event_queue_mtx));
if (sysmon_power_event_queue_count == 0)
return 0;
*pev = sysmon_power_event_queue[sysmon_power_event_queue_tail];
sysmon_power_event_queue_tail =
SYSMON_NEXT_EVENT(sysmon_power_event_queue_tail);
sysmon_power_event_queue_count--;
return 1;
}
/*
* sysmon_power_event_queue_flush:
*
* Flush the event queue, and reset all state.
*/
static void
sysmon_power_event_queue_flush(void)
{
KASSERT(mutex_owned(&sysmon_power_event_queue_mtx));
sysmon_power_event_queue_head = 0;
sysmon_power_event_queue_tail = 0;
sysmon_power_event_queue_count = 0;
}
/*
* sysmon_power_daemon_task:
*
* Assign required power event members and sends a signal
* to the process to notify that an event was enqueued successfully.
*/
static int
sysmon_power_daemon_task(struct power_event_dictionary *ped,
void *pev_data, int event)
{
power_event_t pev;
int rv, error = 0;
if (!ped || !ped->dict || !pev_data)
return EINVAL;
mutex_enter(&sysmon_power_event_queue_mtx);
switch (event) {
/*
* Power switch events.
*/
case PSWITCH_EVENT_PRESSED:
case PSWITCH_EVENT_RELEASED:
{
struct sysmon_pswitch *pswitch =
(struct sysmon_pswitch *)pev_data;
pev.pev_type = POWER_EVENT_SWITCH_STATE_CHANGE;
#ifdef COMPAT_40
pev.pev_switch.psws_state = event;
pev.pev_switch.psws_type = pswitch->smpsw_type;
if (pswitch->smpsw_name) {
(void)strlcpy(pev.pev_switch.psws_name,
pswitch->smpsw_name,
sizeof(pev.pev_switch.psws_name));
}
#endif
error = sysmon_power_make_dictionary(ped->dict,
pswitch,
event,
pev.pev_type);
if (error) {
mutex_exit(&sysmon_power_event_queue_mtx);
goto out;
}
break;
}
/*
* ENVSYS events.
*/
case PENVSYS_EVENT_NORMAL:
case PENVSYS_EVENT_CRITICAL:
case PENVSYS_EVENT_CRITUNDER:
case PENVSYS_EVENT_CRITOVER:
case PENVSYS_EVENT_WARNUNDER:
case PENVSYS_EVENT_WARNOVER:
case PENVSYS_EVENT_BATT_CRIT:
case PENVSYS_EVENT_BATT_WARN:
case PENVSYS_EVENT_BATT_HIGH:
case PENVSYS_EVENT_BATT_MAX:
case PENVSYS_EVENT_STATE_CHANGED:
case PENVSYS_EVENT_LOW_POWER:
{
struct penvsys_state *penvsys =
(struct penvsys_state *)pev_data;
pev.pev_type = POWER_EVENT_ENVSYS_STATE_CHANGE;
error = sysmon_power_make_dictionary(ped->dict,
penvsys,
event,
pev.pev_type);
if (error) {
mutex_exit(&sysmon_power_event_queue_mtx);
goto out;
}
break;
}
default:
error = ENOTTY;
mutex_exit(&sysmon_power_event_queue_mtx);
goto out;
}
/*
* Enqueue the event.
*/
rv = sysmon_queue_power_event(&pev);
if (rv == 0) {
printf("%s: WARNING: state change event %d lost; "
"queue full\n", __func__, pev.pev_type);
mutex_exit(&sysmon_power_event_queue_mtx);
error = EINVAL;
goto out;
} else {
/*
* Notify the daemon that an event is ready and its
* dictionary is ready to be fetched.
*/
ped->flags |= SYSMON_POWER_DICTIONARY_READY;
SIMPLEQ_INSERT_TAIL(&pev_dict_list, ped, pev_dict_head);
cv_broadcast(&sysmon_power_event_queue_cv);
mutex_exit(&sysmon_power_event_queue_mtx);
selnotify(&sysmon_power_event_queue_selinfo, 0, 0);
}
out:
return error;
}
/*
* sysmonopen_power:
*
* Open the system monitor device.
*/
int
sysmonopen_power(dev_t dev, int flag, int mode, struct lwp *l)
{
int error = 0;
mutex_enter(&sysmon_power_event_queue_mtx);
if (sysmon_power_daemon != NULL)
error = EBUSY;
else {
sysmon_power_daemon = l;
sysmon_power_event_queue_flush();
}
mutex_exit(&sysmon_power_event_queue_mtx);
return error;
}
/*
* sysmonclose_power:
*
* Close the system monitor device.
*/
int
sysmonclose_power(dev_t dev, int flag, int mode, struct lwp *l)
{
int count;
mutex_enter(&sysmon_power_event_queue_mtx);
count = sysmon_power_event_queue_count;
sysmon_power_daemon = NULL;
sysmon_power_event_queue_flush();
mutex_exit(&sysmon_power_event_queue_mtx);
if (count)
printf("WARNING: %d power event%s lost by exiting daemon\n",
count, count > 1 ? "s" : "");
return 0;
}
/*
* sysmonread_power:
*
* Read the system monitor device.
*/
int
sysmonread_power(dev_t dev, struct uio *uio, int flags)
{
power_event_t pev;
int rv;
/* We only allow one event to be read at a time. */
if (uio->uio_resid != POWER_EVENT_MSG_SIZE)
return EINVAL;
mutex_enter(&sysmon_power_event_queue_mtx);
for (;;) {
if (sysmon_get_power_event(&pev)) {
rv = uiomove(&pev, POWER_EVENT_MSG_SIZE, uio);
break;
}
if (flags & IO_NDELAY) {
rv = EWOULDBLOCK;
break;
}
cv_wait(&sysmon_power_event_queue_cv,
&sysmon_power_event_queue_mtx);
}
mutex_exit(&sysmon_power_event_queue_mtx);
return rv;
}
/*
* sysmonpoll_power:
*
* Poll the system monitor device.
*/
int
sysmonpoll_power(dev_t dev, int events, struct lwp *l)
{
int revents;
revents = events & (POLLOUT | POLLWRNORM);
/* Attempt to save some work. */
if ((events & (POLLIN | POLLRDNORM)) == 0)
return revents;
mutex_enter(&sysmon_power_event_queue_mtx);
if (sysmon_power_event_queue_count)
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(l, &sysmon_power_event_queue_selinfo);
mutex_exit(&sysmon_power_event_queue_mtx);
return revents;
}
static void
filt_sysmon_power_rdetach(struct knote *kn)
{
mutex_enter(&sysmon_power_event_queue_mtx);
SLIST_REMOVE(&sysmon_power_event_queue_selinfo.sel_klist,
kn, knote, kn_selnext);
mutex_exit(&sysmon_power_event_queue_mtx);
}
static int
filt_sysmon_power_read(struct knote *kn, long hint)
{
mutex_enter(&sysmon_power_event_queue_mtx);
kn->kn_data = sysmon_power_event_queue_count;
mutex_exit(&sysmon_power_event_queue_mtx);
return kn->kn_data > 0;
}
static const struct filterops sysmon_power_read_filtops =
{ 1, NULL, filt_sysmon_power_rdetach, filt_sysmon_power_read };
static const struct filterops sysmon_power_write_filtops =
{ 1, NULL, filt_sysmon_power_rdetach, filt_seltrue };
/*
* sysmonkqfilter_power:
*
* Kqueue filter for the system monitor device.
*/
int
sysmonkqfilter_power(dev_t dev, struct knote *kn)
{
struct klist *klist;
switch (kn->kn_filter) {
case EVFILT_READ:
klist = &sysmon_power_event_queue_selinfo.sel_klist;
kn->kn_fop = &sysmon_power_read_filtops;
break;
case EVFILT_WRITE:
klist = &sysmon_power_event_queue_selinfo.sel_klist;
kn->kn_fop = &sysmon_power_write_filtops;
break;
default:
return EINVAL;
}
mutex_enter(&sysmon_power_event_queue_mtx);
SLIST_INSERT_HEAD(klist, kn, kn_selnext);
mutex_exit(&sysmon_power_event_queue_mtx);
return 0;
}
/*
* sysmonioctl_power:
*
* Perform a power management control request.
*/
int
sysmonioctl_power(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
{
int error = 0;
switch (cmd) {
case POWER_IOC_GET_TYPE:
case POWER_IOC_GET_TYPE_WITH_LOSSAGE:
{
struct power_type *power_type = (void *) data;
(void)strlcpy(power_type->power_type,
sysmon_power_type,
sizeof(power_type->power_type));
break;
}
case POWER_EVENT_RECVDICT:
{
struct plistref *plist = (struct plistref *)data;
struct power_event_dictionary *ped;
/*
* Get the first dictionary enqueued and mark it
* as busy.
*/
mutex_enter(&sysmon_power_event_queue_mtx);
ped = SIMPLEQ_FIRST(&pev_dict_list);
if (!ped || !ped->dict) {
mutex_exit(&sysmon_power_event_queue_mtx);
error = ENOTSUP;
break;
}
if ((ped->flags & SYSMON_POWER_DICTIONARY_READY) == 0) {
mutex_exit(&sysmon_power_event_queue_mtx);
error = EINVAL;
break;
}
if (ped->flags & SYSMON_POWER_DICTIONARY_BUSY) {
mutex_exit(&sysmon_power_event_queue_mtx);
error = EBUSY;
break;
}
ped->flags |= SYSMON_POWER_DICTIONARY_BUSY;
mutex_exit(&sysmon_power_event_queue_mtx);
/*
* Send it now.
*/
error = prop_dictionary_copyout_ioctl(plist,
cmd,
ped->dict);
/*
* Remove the dictionary now that we don't need it.
*/
mutex_enter(&sysmon_power_event_queue_mtx);
ped->flags &= ~SYSMON_POWER_DICTIONARY_BUSY;
ped->flags &= ~SYSMON_POWER_DICTIONARY_READY;
SIMPLEQ_REMOVE_HEAD(&pev_dict_list, pev_dict_head);
mutex_exit(&sysmon_power_event_queue_mtx);
sysmon_power_destroy_dictionary(ped);
break;
}
default:
error = ENOTTY;
}
return error;
}
/*
* sysmon_power_make_dictionary:
*
* Adds the properties for an event in a dictionary.
*/
int
sysmon_power_make_dictionary(prop_dictionary_t dict, void *power_data,
int event, int type)
{
int i;
KASSERT(mutex_owned(&sysmon_power_event_queue_mtx));
switch (type) {
/*
* create the dictionary for a power switch event.
*/
case POWER_EVENT_SWITCH_STATE_CHANGE:
{
const struct power_event_description *peevent =
pswitch_event_desc;
const struct power_event_description *petype =
pswitch_type_desc;
struct sysmon_pswitch *smpsw =
(struct sysmon_pswitch *)power_data;
const char *pwrtype = "pswitch";
#define SETPROP(key, str) \
do { \
if ((str) != NULL && !prop_dictionary_set_cstring(dict, \
(key), \
(str))) { \
printf("%s: failed to set %s\n", __func__, (str)); \
return EINVAL; \
} \
} while (/* CONSTCOND */ 0)
SETPROP("driver-name", smpsw->smpsw_name);
for (i = 0; peevent[i].type != -1; i++)
if (peevent[i].type == event)
break;
SETPROP("powerd-event-name", peevent[i].desc);
for (i = 0; petype[i].type != -1; i++)
if (petype[i].type == smpsw->smpsw_type)
break;
SETPROP("powerd-script-name", petype[i].desc);
SETPROP("power-type", pwrtype);
break;
}
/*
* create a dictionary for power envsys event.
*/
case POWER_EVENT_ENVSYS_STATE_CHANGE:
{
const struct power_event_description *peevent =
penvsys_event_desc;
const struct power_event_description *petype =
penvsys_type_desc;
struct penvsys_state *pes =
(struct penvsys_state *)power_data;
const char *pwrtype = "envsys";
SETPROP("driver-name", pes->pes_dvname);
SETPROP("sensor-name", pes->pes_sensname);
SETPROP("state-description", pes->pes_statedesc);
for (i = 0; peevent[i].type != -1; i++)
if (peevent[i].type == event)
break;
SETPROP("powerd-event-name", peevent[i].desc);
for (i = 0; petype[i].type != -1; i++)
if (petype[i].type == pes->pes_type)
break;
SETPROP("powerd-script-name", petype[i].desc);
SETPROP("power-type", pwrtype);
break;
}
default:
return ENOTSUP;
}
return 0;
}
/*
* sysmon_power_destroy_dictionary:
*
* Destroys a power_event_dictionary object and all its
* properties in the dictionary.
*/
static void
sysmon_power_destroy_dictionary(struct power_event_dictionary *ped)
{
prop_object_iterator_t iter;
prop_object_t obj;
KASSERT(ped != NULL);
KASSERT((ped->flags & SYSMON_POWER_DICTIONARY_BUSY) == 0);
iter = prop_dictionary_iterator(ped->dict);
if (iter == NULL)
return;
while ((obj = prop_object_iterator_next(iter)) != NULL) {
prop_dictionary_remove(ped->dict,
prop_dictionary_keysym_cstring_nocopy(obj));
prop_object_iterator_reset(iter);
}
prop_object_iterator_release(iter);
prop_object_release(ped->dict);
kmem_free(ped, sizeof(*ped));
}
/*
* sysmon_power_settype:
*
* Sets the back-end power management type. This information can
* be used by the power management daemon.
*/
void
sysmon_power_settype(const char *type)
{
/*
* Don't bother locking this; it's going to be set
* during autoconfiguration, and then only read from
* then on.
*/
(void)strlcpy(sysmon_power_type, type, sizeof(sysmon_power_type));
}
#define PENVSYS_SHOWSTATE(str) \
do { \
printf("%s: %s limit on '%s'\n", \
pes->pes_dvname, (str), pes->pes_sensname); \
} while (/* CONSTCOND */ 0)
/*
* sysmon_penvsys_event:
*
* Puts an event onto the sysmon power queue and sends the
* appropriate event if the daemon is running, otherwise a
* message is shown.
*/
void
sysmon_penvsys_event(struct penvsys_state *pes, int event)
{
struct power_event_dictionary *ped;
const char *mystr = NULL;
KASSERT(pes != NULL);
rnd_add_uint32(&sysmon_rndsource, pes->pes_type);
if (sysmon_power_daemon != NULL) {
/*
* Create a dictionary for the new event.
*/
ped = kmem_zalloc(sizeof(*ped), KM_NOSLEEP);
if (!ped)
return;
ped->dict = prop_dictionary_create();
if (sysmon_power_daemon_task(ped, pes, event) == 0)
return;
/* We failed */
prop_object_release(ped->dict);
kmem_free(ped, sizeof(*ped));
}
switch (pes->pes_type) {
case PENVSYS_TYPE_BATTERY:
switch (event) {
case PENVSYS_EVENT_LOW_POWER:
printf("sysmon: LOW POWER! SHUTTING DOWN.\n");
cpu_reboot(RB_POWERDOWN, NULL);
break;
case PENVSYS_EVENT_STATE_CHANGED:
printf("%s: state changed on '%s' to '%s'\n",
pes->pes_dvname, pes->pes_sensname,
pes->pes_statedesc);
break;
case PENVSYS_EVENT_BATT_CRIT:
mystr = "critical capacity";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_BATT_WARN:
mystr = "warning capacity";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_BATT_HIGH:
mystr = "high capacity";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_BATT_MAX:
mystr = "maximum capacity";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_NORMAL:
printf("%s: normal capacity on '%s'\n",
pes->pes_dvname, pes->pes_sensname);
break;
}
break;
case PENVSYS_TYPE_FAN:
case PENVSYS_TYPE_INDICATOR:
case PENVSYS_TYPE_TEMP:
case PENVSYS_TYPE_POWER:
case PENVSYS_TYPE_RESISTANCE:
case PENVSYS_TYPE_VOLTAGE:
switch (event) {
case PENVSYS_EVENT_CRITICAL:
mystr = "critical";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_CRITOVER:
mystr = "critical over";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_CRITUNDER:
mystr = "critical under";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_WARNOVER:
mystr = "warning over";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_WARNUNDER:
mystr = "warning under";
PENVSYS_SHOWSTATE(mystr);
break;
case PENVSYS_EVENT_NORMAL:
printf("%s: normal state on '%s'\n",
pes->pes_dvname, pes->pes_sensname);
break;
default:
printf("%s: unknown event\n", __func__);
}
break;
case PENVSYS_TYPE_DRIVE:
switch (event) {
case PENVSYS_EVENT_STATE_CHANGED:
printf("%s: state changed on '%s' to '%s'\n",
pes->pes_dvname, pes->pes_sensname,
pes->pes_statedesc);
break;
case PENVSYS_EVENT_NORMAL:
printf("%s: normal state on '%s' (%s)\n",
pes->pes_dvname, pes->pes_sensname,
pes->pes_statedesc);
break;
}
break;
default:
printf("%s: unknown power type\n", __func__);
break;
}
}
/*
* sysmon_pswitch_register:
*
* Register a power switch device.
*/
int
sysmon_pswitch_register(struct sysmon_pswitch *smpsw)
{
(void)RUN_ONCE(&once_power, power_preinit);
return 0;
}
/*
* sysmon_pswitch_unregister:
*
* Unregister a power switch device.
*/
void
sysmon_pswitch_unregister(struct sysmon_pswitch *smpsw)
{
/* nada */
}
/*
* sysmon_pswitch_event:
*
* Register an event on a power switch device.
*/
void
sysmon_pswitch_event(struct sysmon_pswitch *smpsw, int event)
{
struct power_event_dictionary *ped = NULL;
KASSERT(smpsw != NULL);
/*
* For pnp specific events, we don't care if the power daemon
* is running or not
*/
if (smpsw->smpsw_type == PSWITCH_TYPE_LID) {
switch (event) {
case PSWITCH_EVENT_PRESSED:
pmf_event_inject(NULL, PMFE_CHASSIS_LID_CLOSE);
break;
case PSWITCH_EVENT_RELEASED:
pmf_event_inject(NULL, PMFE_CHASSIS_LID_OPEN);
break;
default:
break;
}
}
if (sysmon_power_daemon != NULL) {
/*
* Create a new dictionary for the event.
*/
ped = kmem_zalloc(sizeof(*ped), KM_NOSLEEP);
if (!ped)
return;
ped->dict = prop_dictionary_create();
if (sysmon_power_daemon_task(ped, smpsw, event) == 0)
return;
/* We failed */
prop_object_release(ped->dict);
kmem_free(ped, sizeof(*ped));
}
switch (smpsw->smpsw_type) {
case PSWITCH_TYPE_POWER:
if (event != PSWITCH_EVENT_PRESSED) {
/* just ignore it */
return;
}
/*
* Attempt a somewhat graceful shutdown of the system,
* as if the user has issued a reboot(2) call with
* RB_POWERDOWN.
*/
printf("%s: power button pressed, shutting down!\n",
smpsw->smpsw_name);
cpu_reboot(RB_POWERDOWN, NULL);
break;
case PSWITCH_TYPE_RESET:
if (event != PSWITCH_EVENT_PRESSED) {
/* just ignore it */
return;
}
/*
* Attempt a somewhat graceful reboot of the system,
* as if the user had issued a reboot(2) call.
*/
printf("%s: reset button pressed, rebooting!\n",
smpsw->smpsw_name);
cpu_reboot(0, NULL);
break;
case PSWITCH_TYPE_SLEEP:
if (event != PSWITCH_EVENT_PRESSED) {
/* just ignore it */
return;
}
/*
* Try to enter a "sleep" state.
*/
/* XXX */
printf("%s: sleep button pressed.\n", smpsw->smpsw_name);
break;
case PSWITCH_TYPE_HOTKEY:
/*
* Eat up the event, there's nothing we can do
*/
break;
case PSWITCH_TYPE_LID:
switch (event) {
case PSWITCH_EVENT_PRESSED:
/*
* Try to enter a "standby" state.
*/
/* XXX */
printf("%s: lid closed.\n", smpsw->smpsw_name);
break;
case PSWITCH_EVENT_RELEASED:
/*
* Come out of "standby" state.
*/
/* XXX */
printf("%s: lid opened.\n", smpsw->smpsw_name);
break;
default:
printf("%s: unknown lid switch event: %d\n",
smpsw->smpsw_name, event);
}
break;
case PSWITCH_TYPE_ACADAPTER:
switch (event) {
case PSWITCH_EVENT_PRESSED:
/*
* Come out of power-save state.
*/
aprint_normal("%s: AC adapter online.\n",
smpsw->smpsw_name);
break;
case PSWITCH_EVENT_RELEASED:
/*
* Try to enter a power-save state.
*/
aprint_normal("%s: AC adapter offline.\n",
smpsw->smpsw_name);
break;
}
break;
}
}
static
int
sysmon_power_modcmd(modcmd_t cmd, void *arg)
{
int ret;
switch (cmd) {
case MODULE_CMD_INIT:
ret = sysmon_power_init();
break;
case MODULE_CMD_FINI:
ret = sysmon_power_fini();
break;
case MODULE_CMD_STAT:
default:
ret = ENOTTY;
}
return ret;
}
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