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freebsd-dev/sys/i386/acpica/acpi_machdep.c
John Baldwin 5217af301c Rework how the nexus(4) device works on x86 to better handle the idea of 
different "platforms" on x86 machines.  The existing code already handles
having two platforms: ACPI and legacy.  However, the existing approach was
rather hardcoded and difficult to extend.  These changes take the approach
that each x86 hardware platform should provide its own nexus(4) driver (it
can inherit most of its behavior from the default legacy nexus(4) driver)
which is responsible for probing for the platform and performing
appropriate platform-specific setup during attach (such as adding a
platform-specific bus device).  This does mean changing the x86 platform
busses to no longer use an identify routine for probing, but to move that
logic into their matching nexus(4) driver instead.
- Make the default nexus(4) driver in nexus.c on i386 and amd64 handle the
  legacy platform.  It's probe routine now returns BUS_PROBE_GENERIC so it
  can be overriden.
- Expose a nexus_init_resources() routine which initializes the various
  resource managers so that subclassed nexus(4) drivers can invoke it from
  their attach routine.
- The legacy nexus(4) driver explicitly adds a legacy0 device in its
  attach routine.
- The ACPI driver no longer contains an new-bus identify method.  Instead
  it exposes a public function (acpi_identify()) which is a probe routine
  that the MD nexus(4) drivers can use to probe for ACPI.  All of the
  probe logic in acpi_probe() is now moved into acpi_identify() and
  acpi_probe() is just a stub.
- On i386 and amd64, an ACPI-specific nexus(4) driver checks for ACPI via
  acpi_identify() and claims the nexus0 device if the probe succeeds.  It
  then explicitly adds an acpi0 device in its attach routine.
- The legacy(4) driver no longer knows anything about the acpi0 device.
- On ia64 if acpi_identify() fails you basically end up with no devices.
  This matches the previous behavior where the old acpi_identify() would
  fail to add an acpi0 device again leaving you with no devices.

Discussed with:	imp
Silence on:	arch@
2008-03-13 20:39:04 +00:00

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/*-
* Copyright (c) 2001 Mitsuru IWASAKI
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/condvar.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/poll.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <contrib/dev/acpica/acpi.h>
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
#include <machine/nexusvar.h>
/*
* APM driver emulation
*/
#include <machine/apm_bios.h>
#include <machine/pc/bios.h>
#include <i386/bios/apm.h>
SYSCTL_DECL(_debug_acpi);
uint32_t acpi_resume_beep;
TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep);
SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep,
0, "Beep the PC speaker when resuming");
uint32_t acpi_reset_video;
TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video);
static int intr_model = ACPI_INTR_PIC;
static int apm_active;
static struct clonedevs *apm_clones;
MALLOC_DEFINE(M_APMDEV, "apmdev", "APM device emulation");
static d_open_t apmopen;
static d_close_t apmclose;
static d_write_t apmwrite;
static d_ioctl_t apmioctl;
static d_poll_t apmpoll;
static d_kqfilter_t apmkqfilter;
static void apmreadfiltdetach(struct knote *kn);
static int apmreadfilt(struct knote *kn, long hint);
static struct filterops apm_readfiltops =
{ 1, NULL, apmreadfiltdetach, apmreadfilt };
static struct cdevsw apm_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_TRACKCLOSE,
.d_open = apmopen,
.d_close = apmclose,
.d_write = apmwrite,
.d_ioctl = apmioctl,
.d_poll = apmpoll,
.d_name = "apm",
.d_kqfilter = apmkqfilter
};
static int
acpi_capm_convert_battstate(struct acpi_battinfo *battp)
{
int state;
state = APM_UNKNOWN;
if (battp->state & ACPI_BATT_STAT_DISCHARG) {
if (battp->cap >= 50)
state = 0; /* high */
else
state = 1; /* low */
}
if (battp->state & ACPI_BATT_STAT_CRITICAL)
state = 2; /* critical */
if (battp->state & ACPI_BATT_STAT_CHARGING)
state = 3; /* charging */
/* If still unknown, determine it based on the battery capacity. */
if (state == APM_UNKNOWN) {
if (battp->cap >= 50)
state = 0; /* high */
else
state = 1; /* low */
}
return (state);
}
static int
acpi_capm_convert_battflags(struct acpi_battinfo *battp)
{
int flags;
flags = 0;
if (battp->cap >= 50)
flags |= APM_BATT_HIGH;
else {
if (battp->state & ACPI_BATT_STAT_CRITICAL)
flags |= APM_BATT_CRITICAL;
else
flags |= APM_BATT_LOW;
}
if (battp->state & ACPI_BATT_STAT_CHARGING)
flags |= APM_BATT_CHARGING;
if (battp->state == ACPI_BATT_STAT_NOT_PRESENT)
flags = APM_BATT_NOT_PRESENT;
return (flags);
}
static int
acpi_capm_get_info(apm_info_t aip)
{
int acline;
struct acpi_battinfo batt;
aip->ai_infoversion = 1;
aip->ai_major = 1;
aip->ai_minor = 2;
aip->ai_status = apm_active;
aip->ai_capabilities= 0xff00; /* unknown */
if (acpi_acad_get_acline(&acline))
aip->ai_acline = APM_UNKNOWN; /* unknown */
else
aip->ai_acline = acline; /* on/off */
if (acpi_battery_get_battinfo(NULL, &batt) != 0) {
aip->ai_batt_stat = APM_UNKNOWN;
aip->ai_batt_life = APM_UNKNOWN;
aip->ai_batt_time = -1; /* unknown */
aip->ai_batteries = ~0U; /* unknown */
} else {
aip->ai_batt_stat = acpi_capm_convert_battstate(&batt);
aip->ai_batt_life = batt.cap;
aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
aip->ai_batteries = acpi_battery_get_units();
}
return (0);
}
static int
acpi_capm_get_pwstatus(apm_pwstatus_t app)
{
device_t dev;
int acline, unit, error;
struct acpi_battinfo batt;
if (app->ap_device != PMDV_ALLDEV &&
(app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
return (1);
if (app->ap_device == PMDV_ALLDEV)
error = acpi_battery_get_battinfo(NULL, &batt);
else {
unit = app->ap_device - PMDV_BATT0;
dev = devclass_get_device(devclass_find("battery"), unit);
if (dev != NULL)
error = acpi_battery_get_battinfo(dev, &batt);
else
error = ENXIO;
}
if (error)
return (1);
app->ap_batt_stat = acpi_capm_convert_battstate(&batt);
app->ap_batt_flag = acpi_capm_convert_battflags(&batt);
app->ap_batt_life = batt.cap;
app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60;
if (acpi_acad_get_acline(&acline))
app->ap_acline = APM_UNKNOWN;
else
app->ap_acline = acline; /* on/off */
return (0);
}
/* Create single-use devices for /dev/apm and /dev/apmctl. */
static void
apm_clone(void *arg, struct ucred *cred, char *name, int namelen,
struct cdev **dev)
{
int ctl_dev, unit;
if (*dev != NULL)
return;
if (strcmp(name, "apmctl") == 0)
ctl_dev = TRUE;
else if (strcmp(name, "apm") == 0)
ctl_dev = FALSE;
else
return;
/* Always create a new device and unit number. */
unit = -1;
if (clone_create(&apm_clones, &apm_cdevsw, &unit, dev, 0)) {
if (ctl_dev) {
*dev = make_dev(&apm_cdevsw, unit2minor(unit),
UID_ROOT, GID_OPERATOR, 0660, "apmctl%d", unit);
} else {
*dev = make_dev(&apm_cdevsw, unit2minor(unit),
UID_ROOT, GID_OPERATOR, 0664, "apm%d", unit);
}
if (*dev != NULL) {
dev_ref(*dev);
(*dev)->si_flags |= SI_CHEAPCLONE;
}
}
}
/* Create a struct for tracking per-device suspend notification. */
static struct apm_clone_data *
apm_create_clone(struct cdev *dev, struct acpi_softc *acpi_sc)
{
struct apm_clone_data *clone;
clone = malloc(sizeof(*clone), M_APMDEV, M_WAITOK);
clone->cdev = dev;
clone->acpi_sc = acpi_sc;
clone->notify_status = APM_EV_NONE;
bzero(&clone->sel_read, sizeof(clone->sel_read));
knlist_init(&clone->sel_read.si_note, &acpi_mutex, NULL, NULL, NULL);
/*
* The acpi device is always managed by devd(8) and is considered
* writable (i.e., ack is required to allow suspend to proceed.)
*/
if (strcmp("acpi", devtoname(dev)) == 0)
clone->flags = ACPI_EVF_DEVD | ACPI_EVF_WRITE;
else
clone->flags = ACPI_EVF_NONE;
ACPI_LOCK(acpi);
STAILQ_INSERT_TAIL(&acpi_sc->apm_cdevs, clone, entries);
ACPI_UNLOCK(acpi);
return (clone);
}
static int
apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
struct acpi_softc *acpi_sc;
struct apm_clone_data *clone;
acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
clone = apm_create_clone(dev, acpi_sc);
dev->si_drv1 = clone;
/* If the device is opened for write, record that. */
if ((flag & FWRITE) != 0)
clone->flags |= ACPI_EVF_WRITE;
return (0);
}
static int
apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
struct apm_clone_data *clone;
struct acpi_softc *acpi_sc;
clone = dev->si_drv1;
acpi_sc = clone->acpi_sc;
/* We are about to lose a reference so check if suspend should occur */
if (acpi_sc->acpi_next_sstate != 0 &&
clone->notify_status != APM_EV_ACKED)
acpi_AckSleepState(clone, 0);
/* Remove this clone's data from the list and free it. */
ACPI_LOCK(acpi);
STAILQ_REMOVE(&acpi_sc->apm_cdevs, clone, apm_clone_data, entries);
knlist_destroy(&clone->sel_read.si_note);
ACPI_UNLOCK(acpi);
free(clone, M_APMDEV);
destroy_dev_sched(dev);
return (0);
}
static int
apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
{
int error;
struct apm_clone_data *clone;
struct acpi_softc *acpi_sc;
struct apm_info info;
struct apm_event_info *ev_info;
apm_info_old_t aiop;
error = 0;
clone = dev->si_drv1;
acpi_sc = clone->acpi_sc;
switch (cmd) {
case APMIO_SUSPEND:
if ((flag & FWRITE) == 0)
return (EPERM);
if (acpi_sc->acpi_next_sstate == 0) {
if (acpi_sc->acpi_suspend_sx != ACPI_STATE_S5) {
error = acpi_ReqSleepState(acpi_sc,
acpi_sc->acpi_suspend_sx);
} else {
printf(
"power off via apm suspend not supported\n");
error = ENXIO;
}
} else
error = acpi_AckSleepState(clone, 0);
break;
case APMIO_STANDBY:
if ((flag & FWRITE) == 0)
return (EPERM);
if (acpi_sc->acpi_next_sstate == 0) {
if (acpi_sc->acpi_standby_sx != ACPI_STATE_S5) {
error = acpi_ReqSleepState(acpi_sc,
acpi_sc->acpi_standby_sx);
} else {
printf(
"power off via apm standby not supported\n");
error = ENXIO;
}
} else
error = acpi_AckSleepState(clone, 0);
break;
case APMIO_NEXTEVENT:
printf("apm nextevent start\n");
ACPI_LOCK(acpi);
if (acpi_sc->acpi_next_sstate != 0 && clone->notify_status ==
APM_EV_NONE) {
ev_info = (struct apm_event_info *)addr;
if (acpi_sc->acpi_next_sstate <= ACPI_STATE_S3)
ev_info->type = PMEV_STANDBYREQ;
else
ev_info->type = PMEV_SUSPENDREQ;
ev_info->index = 0;
clone->notify_status = APM_EV_NOTIFIED;
printf("apm event returning %d\n", ev_info->type);
} else
error = EAGAIN;
ACPI_UNLOCK(acpi);
break;
case APMIO_GETINFO_OLD:
if (acpi_capm_get_info(&info))
error = ENXIO;
aiop = (apm_info_old_t)addr;
aiop->ai_major = info.ai_major;
aiop->ai_minor = info.ai_minor;
aiop->ai_acline = info.ai_acline;
aiop->ai_batt_stat = info.ai_batt_stat;
aiop->ai_batt_life = info.ai_batt_life;
aiop->ai_status = info.ai_status;
break;
case APMIO_GETINFO:
if (acpi_capm_get_info((apm_info_t)addr))
error = ENXIO;
break;
case APMIO_GETPWSTATUS:
if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr))
error = ENXIO;
break;
case APMIO_ENABLE:
if ((flag & FWRITE) == 0)
return (EPERM);
apm_active = 1;
break;
case APMIO_DISABLE:
if ((flag & FWRITE) == 0)
return (EPERM);
apm_active = 0;
break;
case APMIO_HALTCPU:
break;
case APMIO_NOTHALTCPU:
break;
case APMIO_DISPLAY:
if ((flag & FWRITE) == 0)
return (EPERM);
break;
case APMIO_BIOS:
if ((flag & FWRITE) == 0)
return (EPERM);
bzero(addr, sizeof(struct apm_bios_arg));
break;
default:
error = EINVAL;
break;
}
return (error);
}
static int
apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
{
return (uio->uio_resid);
}
static int
apmpoll(struct cdev *dev, int events, d_thread_t *td)
{
struct apm_clone_data *clone;
int revents;
revents = 0;
ACPI_LOCK(acpi);
clone = dev->si_drv1;
if (clone->acpi_sc->acpi_next_sstate)
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(td, &clone->sel_read);
ACPI_UNLOCK(acpi);
return (revents);
}
static int
apmkqfilter(struct cdev *dev, struct knote *kn)
{
struct apm_clone_data *clone;
ACPI_LOCK(acpi);
clone = dev->si_drv1;
kn->kn_hook = clone;
kn->kn_fop = &apm_readfiltops;
knlist_add(&clone->sel_read.si_note, kn, 0);
ACPI_UNLOCK(acpi);
return (0);
}
static void
apmreadfiltdetach(struct knote *kn)
{
struct apm_clone_data *clone;
ACPI_LOCK(acpi);
clone = kn->kn_hook;
knlist_remove(&clone->sel_read.si_note, kn, 0);
ACPI_UNLOCK(acpi);
}
static int
apmreadfilt(struct knote *kn, long hint)
{
struct apm_clone_data *clone;
int sleeping;
ACPI_LOCK(acpi);
clone = kn->kn_hook;
sleeping = clone->acpi_sc->acpi_next_sstate ? 1 : 0;
ACPI_UNLOCK(acpi);
return (sleeping);
}
int
acpi_machdep_init(device_t dev)
{
struct acpi_softc *acpi_sc;
acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
/* Create a clone for /dev/acpi also. */
STAILQ_INIT(&acpi_sc->apm_cdevs);
acpi_sc->acpi_clone = apm_create_clone(acpi_sc->acpi_dev_t, acpi_sc);
clone_setup(&apm_clones);
EVENTHANDLER_REGISTER(dev_clone, apm_clone, 0, 1000);
acpi_install_wakeup_handler(acpi_sc);
if (intr_model == ACPI_INTR_PIC)
BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt,
INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW);
else
acpi_SetIntrModel(intr_model);
SYSCTL_ADD_UINT(&acpi_sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO,
"reset_video", CTLFLAG_RW, &acpi_reset_video, 0,
"Call the VESA reset BIOS vector on the resume path");
return (0);
}
void
acpi_SetDefaultIntrModel(int model)
{
intr_model = model;
}
/* Check BIOS date. If 1998 or older, disable ACPI. */
int
acpi_machdep_quirks(int *quirks)
{
char *va;
int year;
/* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */
va = pmap_mapbios(0xffff0, 16);
sscanf(va + 11, "%2d", &year);
pmap_unmapbios((vm_offset_t)va, 16);
/*
* Date must be >= 1/1/1999 or we don't trust ACPI. Note that this
* check must be changed by my 114th birthday.
*/
if (year > 90 && year < 99)
*quirks = ACPI_Q_BROKEN;
return (0);
}
void
acpi_cpu_c1()
{
__asm __volatile("sti; hlt");
}
/*
* ACPI nexus(4) driver.
*/
static int
nexus_acpi_probe(device_t dev)
{
int error;
error = acpi_identify();
if (error)
return (error);
return (BUS_PROBE_DEFAULT);
}
static int
nexus_acpi_attach(device_t dev)
{
nexus_init_resources();
bus_generic_probe(dev);
if (BUS_ADD_CHILD(dev, 10, "acpi", 0) == NULL)
panic("failed to add acpi0 device");
return (bus_generic_attach(dev));
}
static device_method_t nexus_acpi_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_acpi_probe),
DEVMETHOD(device_attach, nexus_acpi_attach),
{ 0, 0 }
};
DEFINE_CLASS_1(nexus, nexus_acpi_driver, nexus_acpi_methods, 1, nexus_driver);
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus_acpi, root, nexus_acpi_driver, nexus_devclass, 0, 0);
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