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freebsd-skq/sys/i386/acpica/acpi_machdep.c
jhb b0b93a3c55 Optimize sx locks to use simple atomic operations for the common cases of 
obtaining and releasing shared and exclusive locks.  The algorithms for
manipulating the lock cookie are very similar to that rwlocks.  This patch
also adds support for exclusive locks using the same algorithm as mutexes.

A new sx_init_flags() function has been added so that optional flags can be
specified to alter a given locks behavior.  The flags include SX_DUPOK,
SX_NOWITNESS, SX_NOPROFILE, and SX_QUITE which are all identical in nature
to the similar flags for mutexes.

Adaptive spinning on select locks may be enabled by enabling the
ADAPTIVE_SX kernel option.  Only locks initialized with the SX_ADAPTIVESPIN
flag via sx_init_flags() will adaptively spin.

The common cases for sx_slock(), sx_sunlock(), sx_xlock(), and sx_xunlock()
are now performed inline in non-debug kernels.  As a result, <sys/sx.h> now
requires <sys/lock.h> to be included prior to <sys/sx.h>.

The new kernel option SX_NOINLINE can be used to disable the aforementioned
inlining in non-debug kernels.

The size of struct sx has changed, so the kernel ABI is probably greatly
disturbed.

MFC after:	1 month
Submitted by:	attilio
Tested by:	kris, pjd
2007-03-31 23:23:42 +00:00

370 lines
8.4 KiB
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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/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>
/*
* APM driver emulation
*/
#include <sys/selinfo.h>
#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 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 struct cdevsw apm_cdevsw = {
.d_version = D_VERSION,
.d_open = apmopen,
.d_close = apmclose,
.d_write = apmwrite,
.d_ioctl = apmioctl,
.d_poll = apmpoll,
.d_name = "apm",
};
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);
}
static int
apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
{
int error = 0;
struct acpi_softc *acpi_sc;
struct apm_info info;
apm_info_old_t aiop;
acpi_sc = devclass_get_softc(devclass_find("acpi"), 0);
switch (cmd) {
case APMIO_SUSPEND:
if ((flag & FWRITE) == 0)
return (EPERM);
if (apm_active)
acpi_SetSleepState(acpi_sc, acpi_sc->acpi_suspend_sx);
else
error = EINVAL;
break;
case APMIO_STANDBY:
if ((flag & FWRITE) == 0)
return (EPERM);
if (apm_active)
acpi_SetSleepState(acpi_sc, acpi_sc->acpi_standby_sx);
else
error = EINVAL;
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)
{
return (0);
}
static void
acpi_capm_init(struct acpi_softc *sc)
{
make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
}
int
acpi_machdep_init(device_t dev)
{
struct acpi_softc *sc;
sc = devclass_get_softc(devclass_find("acpi"), 0);
acpi_capm_init(sc);
acpi_install_wakeup_handler(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(&sc->acpi_sysctl_ctx,
SYSCTL_CHILDREN(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");
}
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