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freebsd-nq/sys/dev/acpica/acpi.c
Andriy Gapon 85f95fffd7 hook userland threads suspend + resume into acpi suspend code 
Also, split power_suspend into power_suspend and power_suspend_early.

power_suspend_early is called before the userland is frozen.
power_suspend is called after the userland is frozen.

Currently only VT switching is hooked to power_suspend_early.
This is needed because switching away from X server requires its
cooperation, so obviously X server must not be frozen when that happens.

Freezing userland during ACPI suspend is useful because not all drivers
correctly handle suspension concurrent with other activity.  This is
especially applicable to drivers ported from other operating systems
that suspend all software activity between placing drivers and hardware
into suspended state.
In particular drm2/radeon (radeonkms) depends on the described
procedure.  The driver does not have any internal synchronization
between suspension activities and processing of userland requests.

Many thanks to kib for the code that allows to freeze and thaw all
userland threads.

Note that ideally we also need to park / inhibit (non-special) kernel
threads as well to ensure that they do not call into drivers.

MFC after:	17 days
2015-01-27 17:33:18 +00:00

4000 lines
110 KiB
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/*-
* Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org>
* Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org>
* Copyright (c) 2000, 2001 Michael Smith
* Copyright (c) 2000 BSDi
* 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 "opt_acpi.h"
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/ioccom.h>
#include <sys/reboot.h>
#include <sys/sysctl.h>
#include <sys/ctype.h>
#include <sys/linker.h>
#include <sys/power.h>
#include <sys/sbuf.h>
#include <sys/sched.h>
#include <sys/smp.h>
#include <sys/timetc.h>
#if defined(__i386__) || defined(__amd64__)
#include <machine/pci_cfgreg.h>
#endif
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include <isa/pnpvar.h>
#include <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acnamesp.h>
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
#include <vm/vm_param.h>
static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
/* Hooks for the ACPI CA debugging infrastructure */
#define _COMPONENT ACPI_BUS
ACPI_MODULE_NAME("ACPI")
static d_open_t acpiopen;
static d_close_t acpiclose;
static d_ioctl_t acpiioctl;
static struct cdevsw acpi_cdevsw = {
.d_version = D_VERSION,
.d_open = acpiopen,
.d_close = acpiclose,
.d_ioctl = acpiioctl,
.d_name = "acpi",
};
struct acpi_interface {
ACPI_STRING *data;
int num;
};
/* Global mutex for locking access to the ACPI subsystem. */
struct mtx acpi_mutex;
struct callout acpi_sleep_timer;
/* Bitmap of device quirks. */
int acpi_quirks;
/* Supported sleep states. */
static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
static int acpi_modevent(struct module *mod, int event, void *junk);
static int acpi_probe(device_t dev);
static int acpi_attach(device_t dev);
static int acpi_suspend(device_t dev);
static int acpi_resume(device_t dev);
static int acpi_shutdown(device_t dev);
static device_t acpi_add_child(device_t bus, u_int order, const char *name,
int unit);
static int acpi_print_child(device_t bus, device_t child);
static void acpi_probe_nomatch(device_t bus, device_t child);
static void acpi_driver_added(device_t dev, driver_t *driver);
static int acpi_read_ivar(device_t dev, device_t child, int index,
uintptr_t *result);
static int acpi_write_ivar(device_t dev, device_t child, int index,
uintptr_t value);
static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
static void acpi_reserve_resources(device_t dev);
static int acpi_sysres_alloc(device_t dev);
static int acpi_set_resource(device_t dev, device_t child, int type,
int rid, u_long start, u_long count);
static struct resource *acpi_alloc_resource(device_t bus, device_t child,
int type, int *rid, u_long start, u_long end,
u_long count, u_int flags);
static int acpi_adjust_resource(device_t bus, device_t child, int type,
struct resource *r, u_long start, u_long end);
static int acpi_release_resource(device_t bus, device_t child, int type,
int rid, struct resource *r);
static void acpi_delete_resource(device_t bus, device_t child, int type,
int rid);
static uint32_t acpi_isa_get_logicalid(device_t dev);
static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
ACPI_BUFFER *ret);
static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
void *context, void **retval);
static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
int max_depth, acpi_scan_cb_t user_fn, void *arg);
static int acpi_set_powerstate(device_t child, int state);
static int acpi_isa_pnp_probe(device_t bus, device_t child,
struct isa_pnp_id *ids);
static void acpi_probe_children(device_t bus);
static void acpi_probe_order(ACPI_HANDLE handle, int *order);
static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
void *context, void **status);
static void acpi_sleep_enable(void *arg);
static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
static void acpi_shutdown_final(void *arg, int howto);
static void acpi_enable_fixed_events(struct acpi_softc *sc);
static BOOLEAN acpi_has_hid(ACPI_HANDLE handle);
static void acpi_resync_clock(struct acpi_softc *sc);
static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
static int acpi_wake_prep_walk(int sstate);
static int acpi_wake_sysctl_walk(device_t dev);
static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
static void acpi_system_eventhandler_sleep(void *arg, int state);
static void acpi_system_eventhandler_wakeup(void *arg, int state);
static int acpi_sname2sstate(const char *sname);
static const char *acpi_sstate2sname(int sstate);
static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_pm_func(u_long cmd, void *arg, ...);
static int acpi_child_location_str_method(device_t acdev, device_t child,
char *buf, size_t buflen);
static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
char *buf, size_t buflen);
#if defined(__i386__) || defined(__amd64__)
static void acpi_enable_pcie(void);
#endif
static void acpi_hint_device_unit(device_t acdev, device_t child,
const char *name, int *unitp);
static void acpi_reset_interfaces(device_t dev);
static device_method_t acpi_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, acpi_probe),
DEVMETHOD(device_attach, acpi_attach),
DEVMETHOD(device_shutdown, acpi_shutdown),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_suspend, acpi_suspend),
DEVMETHOD(device_resume, acpi_resume),
/* Bus interface */
DEVMETHOD(bus_add_child, acpi_add_child),
DEVMETHOD(bus_print_child, acpi_print_child),
DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
DEVMETHOD(bus_driver_added, acpi_driver_added),
DEVMETHOD(bus_read_ivar, acpi_read_ivar),
DEVMETHOD(bus_write_ivar, acpi_write_ivar),
DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
DEVMETHOD(bus_set_resource, acpi_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
DEVMETHOD(bus_release_resource, acpi_release_resource),
DEVMETHOD(bus_delete_resource, acpi_delete_resource),
DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
DEVMETHOD(bus_get_domain, acpi_get_domain),
/* ACPI bus */
DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
/* ISA emulation */
DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
DEVMETHOD_END
};
static driver_t acpi_driver = {
"acpi",
acpi_methods,
sizeof(struct acpi_softc),
};
static devclass_t acpi_devclass;
DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
MODULE_VERSION(acpi, 1);
ACPI_SERIAL_DECL(acpi, "ACPI root bus");
/* Local pools for managing system resources for ACPI child devices. */
static struct rman acpi_rman_io, acpi_rman_mem;
#define ACPI_MINIMUM_AWAKETIME 5
/* Holds the description of the acpi0 device. */
static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
static char acpi_ca_version[12];
SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
acpi_ca_version, 0, "Version of Intel ACPI-CA");
/*
* Allow overriding _OSI methods.
*/
static char acpi_install_interface[256];
TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
sizeof(acpi_install_interface));
static char acpi_remove_interface[256];
TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
sizeof(acpi_remove_interface));
/* Allow users to dump Debug objects without ACPI debugger. */
static int acpi_debug_objects;
TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
"Enable Debug objects");
/* Allow the interpreter to ignore common mistakes in BIOS. */
static int acpi_interpreter_slack = 1;
TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
&acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
/* Ignore register widths set by FADT and use default widths instead. */
static int acpi_ignore_reg_width = 1;
TUNABLE_INT("debug.acpi.default_register_width", &acpi_ignore_reg_width);
SYSCTL_INT(_debug_acpi, OID_AUTO, default_register_width, CTLFLAG_RDTUN,
&acpi_ignore_reg_width, 1, "Ignore register widths set by FADT");
#ifdef __amd64__
/* Reset system clock while resuming. XXX Remove once tested. */
static int acpi_reset_clock = 1;
TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
&acpi_reset_clock, 1, "Reset system clock while resuming.");
#endif
/* Allow users to override quirks. */
TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
static int acpi_susp_bounce;
SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
&acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
/*
* ACPI can only be loaded as a module by the loader; activating it after
* system bootstrap time is not useful, and can be fatal to the system.
* It also cannot be unloaded, since the entire system bus hierarchy hangs
* off it.
*/
static int
acpi_modevent(struct module *mod, int event, void *junk)
{
switch (event) {
case MOD_LOAD:
if (!cold) {
printf("The ACPI driver cannot be loaded after boot.\n");
return (EPERM);
}
break;
case MOD_UNLOAD:
if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
return (EBUSY);
break;
default:
break;
}
return (0);
}
/*
* Perform early initialization.
*/
ACPI_STATUS
acpi_Startup(void)
{
static int started = 0;
ACPI_STATUS status;
int val;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/* Only run the startup code once. The MADT driver also calls this. */
if (started)
return_VALUE (AE_OK);
started = 1;
/*
* Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
* if more tables exist.
*/
if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
printf("ACPI: Table initialisation failed: %s\n",
AcpiFormatException(status));
return_VALUE (status);
}
/* Set up any quirks we have for this system. */
if (acpi_quirks == ACPI_Q_OK)
acpi_table_quirks(&acpi_quirks);
/* If the user manually set the disabled hint to 0, force-enable ACPI. */
if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
acpi_quirks &= ~ACPI_Q_BROKEN;
if (acpi_quirks & ACPI_Q_BROKEN) {
printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
status = AE_SUPPORT;
}
return_VALUE (status);
}
/*
* Detect ACPI and perform early initialisation.
*/
int
acpi_identify(void)
{
ACPI_TABLE_RSDP *rsdp;
ACPI_TABLE_HEADER *rsdt;
ACPI_PHYSICAL_ADDRESS paddr;
struct sbuf sb;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (!cold)
return (ENXIO);
/* Check that we haven't been disabled with a hint. */
if (resource_disabled("acpi", 0))
return (ENXIO);
/* Check for other PM systems. */
if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
power_pm_get_type() != POWER_PM_TYPE_ACPI) {
printf("ACPI identify failed, other PM system enabled.\n");
return (ENXIO);
}
/* Initialize root tables. */
if (ACPI_FAILURE(acpi_Startup())) {
printf("ACPI: Try disabling either ACPI or apic support.\n");
return (ENXIO);
}
if ((paddr = AcpiOsGetRootPointer()) == 0 ||
(rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
return (ENXIO);
if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
else
paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
return (ENXIO);
sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
sbuf_trim(&sb);
sbuf_putc(&sb, ' ');
sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
sbuf_trim(&sb);
sbuf_finish(&sb);
sbuf_delete(&sb);
AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
return (0);
}
/*
* Fetch some descriptive data from ACPI to put in our attach message.
*/
static int
acpi_probe(device_t dev)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
device_set_desc(dev, acpi_desc);
return_VALUE (BUS_PROBE_NOWILDCARD);
}
static int
acpi_attach(device_t dev)
{
struct acpi_softc *sc;
ACPI_STATUS status;
int error, state;
UINT32 flags;
UINT8 TypeA, TypeB;
char *env;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
sc = device_get_softc(dev);
sc->acpi_dev = dev;
callout_init(&sc->susp_force_to, TRUE);
error = ENXIO;
/* Initialize resource manager. */
acpi_rman_io.rm_type = RMAN_ARRAY;
acpi_rman_io.rm_start = 0;
acpi_rman_io.rm_end = 0xffff;
acpi_rman_io.rm_descr = "ACPI I/O ports";
if (rman_init(&acpi_rman_io) != 0)
panic("acpi rman_init IO ports failed");
acpi_rman_mem.rm_type = RMAN_ARRAY;
acpi_rman_mem.rm_start = 0;
acpi_rman_mem.rm_end = ~0ul;
acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
if (rman_init(&acpi_rman_mem) != 0)
panic("acpi rman_init memory failed");
/* Initialise the ACPI mutex */
mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
/*
* Set the globals from our tunables. This is needed because ACPI-CA
* uses UINT8 for some values and we have no tunable_byte.
*/
AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
AcpiGbl_UseDefaultRegisterWidths = acpi_ignore_reg_width ? TRUE : FALSE;
#ifndef ACPI_DEBUG
/*
* Disable all debugging layers and levels.
*/
AcpiDbgLayer = 0;
AcpiDbgLevel = 0;
#endif
/* Start up the ACPI CA subsystem. */
status = AcpiInitializeSubsystem();
if (ACPI_FAILURE(status)) {
device_printf(dev, "Could not initialize Subsystem: %s\n",
AcpiFormatException(status));
goto out;
}
/* Override OS interfaces if the user requested. */
acpi_reset_interfaces(dev);
/* Load ACPI name space. */
status = AcpiLoadTables();
if (ACPI_FAILURE(status)) {
device_printf(dev, "Could not load Namespace: %s\n",
AcpiFormatException(status));
goto out;
}
#if defined(__i386__) || defined(__amd64__)
/* Handle MCFG table if present. */
acpi_enable_pcie();
#endif
/*
* Note that some systems (specifically, those with namespace evaluation
* issues that require the avoidance of parts of the namespace) must
* avoid running _INI and _STA on everything, as well as dodging the final
* object init pass.
*
* For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
*
* XXX We should arrange for the object init pass after we have attached
* all our child devices, but on many systems it works here.
*/
flags = 0;
if (testenv("debug.acpi.avoid"))
flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
/* Bring the hardware and basic handlers online. */
if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
device_printf(dev, "Could not enable ACPI: %s\n",
AcpiFormatException(status));
goto out;
}
/*
* Call the ECDT probe function to provide EC functionality before
* the namespace has been evaluated.
*
* XXX This happens before the sysresource devices have been probed and
* attached so its resources come from nexus0. In practice, this isn't
* a problem but should be addressed eventually.
*/
acpi_ec_ecdt_probe(dev);
/* Bring device objects and regions online. */
if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
device_printf(dev, "Could not initialize ACPI objects: %s\n",
AcpiFormatException(status));
goto out;
}
/*
* Setup our sysctl tree.
*
* XXX: This doesn't check to make sure that none of these fail.
*/
sysctl_ctx_init(&sc->acpi_sysctl_ctx);
sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
device_get_name(dev), CTLFLAG_RD, 0, "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
0, 0, acpi_supported_sleep_state_sysctl, "A", "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
&sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
&sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
&sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
&sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
&sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
"sleep delay in seconds");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
&sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "handle_reboot", CTLFLAG_RW,
&sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
/*
* Default to 1 second before sleeping to give some machines time to
* stabilize.
*/
sc->acpi_sleep_delay = 1;
if (bootverbose)
sc->acpi_verbose = 1;
if ((env = kern_getenv("hw.acpi.verbose")) != NULL) {
if (strcmp(env, "0") != 0)
sc->acpi_verbose = 1;
freeenv(env);
}
/* Only enable reboot by default if the FADT says it is available. */
if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
sc->acpi_handle_reboot = 1;
/* Only enable S4BIOS by default if the FACS says it is available. */
if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
sc->acpi_s4bios = 1;
/* Probe all supported sleep states. */
acpi_sleep_states[ACPI_STATE_S0] = TRUE;
for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
if (ACPI_SUCCESS(AcpiEvaluateObject(ACPI_ROOT_OBJECT,
__DECONST(char *, AcpiGbl_SleepStateNames[state]), NULL, NULL)) &&
ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
acpi_sleep_states[state] = TRUE;
/*
* Dispatch the default sleep state to devices. The lid switch is set
* to UNKNOWN by default to avoid surprising users.
*/
sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
/* Pick the first valid sleep state for the sleep button default. */
sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
if (acpi_sleep_states[state]) {
sc->acpi_sleep_button_sx = state;
break;
}
acpi_enable_fixed_events(sc);
/*
* Scan the namespace and attach/initialise children.
*/
/* Register our shutdown handler. */
EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
SHUTDOWN_PRI_LAST);
/*
* Register our acpi event handlers.
* XXX should be configurable eg. via userland policy manager.
*/
EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
sc, ACPI_EVENT_PRI_LAST);
EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
sc, ACPI_EVENT_PRI_LAST);
/* Flag our initial states. */
sc->acpi_enabled = TRUE;
sc->acpi_sstate = ACPI_STATE_S0;
sc->acpi_sleep_disabled = TRUE;
/* Create the control device */
sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
"acpi");
sc->acpi_dev_t->si_drv1 = sc;
if ((error = acpi_machdep_init(dev)))
goto out;
/* Register ACPI again to pass the correct argument of pm_func. */
power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
if (!acpi_disabled("bus"))
acpi_probe_children(dev);
/* Update all GPEs and enable runtime GPEs. */
status = AcpiUpdateAllGpes();
if (ACPI_FAILURE(status))
device_printf(dev, "Could not update all GPEs: %s\n",
AcpiFormatException(status));
/* Allow sleep request after a while. */
callout_init_mtx(&acpi_sleep_timer, &acpi_mutex, 0);
callout_reset(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME,
acpi_sleep_enable, sc);
error = 0;
out:
return_VALUE (error);
}
static void
acpi_set_power_children(device_t dev, int state)
{
device_t child;
device_t *devlist;
int dstate, i, numdevs;
if (device_get_children(dev, &devlist, &numdevs) != 0)
return;
/*
* Retrieve and set D-state for the sleep state if _SxD is present.
* Skip children who aren't attached since they are handled separately.
*/
for (i = 0; i < numdevs; i++) {
child = devlist[i];
dstate = state;
if (device_is_attached(child) &&
acpi_device_pwr_for_sleep(dev, child, &dstate) == 0)
acpi_set_powerstate(child, dstate);
}
free(devlist, M_TEMP);
}
static int
acpi_suspend(device_t dev)
{
int error;
GIANT_REQUIRED;
error = bus_generic_suspend(dev);
if (error == 0)
acpi_set_power_children(dev, ACPI_STATE_D3);
return (error);
}
static int
acpi_resume(device_t dev)
{
GIANT_REQUIRED;
acpi_set_power_children(dev, ACPI_STATE_D0);
return (bus_generic_resume(dev));
}
static int
acpi_shutdown(device_t dev)
{
GIANT_REQUIRED;
/* Allow children to shutdown first. */
bus_generic_shutdown(dev);
/*
* Enable any GPEs that are able to power-on the system (i.e., RTC).
* Also, disable any that are not valid for this state (most).
*/
acpi_wake_prep_walk(ACPI_STATE_S5);
return (0);
}
/*
* Handle a new device being added
*/
static device_t
acpi_add_child(device_t bus, u_int order, const char *name, int unit)
{
struct acpi_device *ad;
device_t child;
if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
return (NULL);
resource_list_init(&ad->ad_rl);
child = device_add_child_ordered(bus, order, name, unit);
if (child != NULL)
device_set_ivars(child, ad);
else
free(ad, M_ACPIDEV);
return (child);
}
static int
acpi_print_child(device_t bus, device_t child)
{
struct acpi_device *adev = device_get_ivars(child);
struct resource_list *rl = &adev->ad_rl;
int retval = 0;
retval += bus_print_child_header(bus, child);
retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
if (device_get_flags(child))
retval += printf(" flags %#x", device_get_flags(child));
retval += bus_print_child_domain(bus, child);
retval += bus_print_child_footer(bus, child);
return (retval);
}
/*
* If this device is an ACPI child but no one claimed it, attempt
* to power it off. We'll power it back up when a driver is added.
*
* XXX Disabled for now since many necessary devices (like fdc and
* ATA) don't claim the devices we created for them but still expect
* them to be powered up.
*/
static void
acpi_probe_nomatch(device_t bus, device_t child)
{
#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
acpi_set_powerstate(child, ACPI_STATE_D3);
#endif
}
/*
* If a new driver has a chance to probe a child, first power it up.
*
* XXX Disabled for now (see acpi_probe_nomatch for details).
*/
static void
acpi_driver_added(device_t dev, driver_t *driver)
{
device_t child, *devlist;
int i, numdevs;
DEVICE_IDENTIFY(driver, dev);
if (device_get_children(dev, &devlist, &numdevs))
return;
for (i = 0; i < numdevs; i++) {
child = devlist[i];
if (device_get_state(child) == DS_NOTPRESENT) {
#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
acpi_set_powerstate(child, ACPI_STATE_D0);
if (device_probe_and_attach(child) != 0)
acpi_set_powerstate(child, ACPI_STATE_D3);
#else
device_probe_and_attach(child);
#endif
}
}
free(devlist, M_TEMP);
}
/* Location hint for devctl(8) */
static int
acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
size_t buflen)
{
struct acpi_device *dinfo = device_get_ivars(child);
char buf2[32];
int pxm;
if (dinfo->ad_handle) {
snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
if (ACPI_SUCCESS(acpi_GetInteger(dinfo->ad_handle, "_PXM", &pxm))) {
snprintf(buf2, 32, " _PXM=%d", pxm);
strlcat(buf, buf2, buflen);
}
} else {
snprintf(buf, buflen, "unknown");
}
return (0);
}
/* PnP information for devctl(8) */
static int
acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
size_t buflen)
{
struct acpi_device *dinfo = device_get_ivars(child);
ACPI_DEVICE_INFO *adinfo;
if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
snprintf(buf, buflen, "unknown");
return (0);
}
snprintf(buf, buflen, "_HID=%s _UID=%lu",
(adinfo->Valid & ACPI_VALID_HID) ?
adinfo->HardwareId.String : "none",
(adinfo->Valid & ACPI_VALID_UID) ?
strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
AcpiOsFree(adinfo);
return (0);
}
/*
* Handle per-device ivars
*/
static int
acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
struct acpi_device *ad;
if ((ad = device_get_ivars(child)) == NULL) {
device_printf(child, "device has no ivars\n");
return (ENOENT);
}
/* ACPI and ISA compatibility ivars */
switch(index) {
case ACPI_IVAR_HANDLE:
*(ACPI_HANDLE *)result = ad->ad_handle;
break;
case ACPI_IVAR_PRIVATE:
*(void **)result = ad->ad_private;
break;
case ACPI_IVAR_FLAGS:
*(int *)result = ad->ad_flags;
break;
case ISA_IVAR_VENDORID:
case ISA_IVAR_SERIAL:
case ISA_IVAR_COMPATID:
*(int *)result = -1;
break;
case ISA_IVAR_LOGICALID:
*(int *)result = acpi_isa_get_logicalid(child);
break;
default:
return (ENOENT);
}
return (0);
}
static int
acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
{
struct acpi_device *ad;
if ((ad = device_get_ivars(child)) == NULL) {
device_printf(child, "device has no ivars\n");
return (ENOENT);
}
switch(index) {
case ACPI_IVAR_HANDLE:
ad->ad_handle = (ACPI_HANDLE)value;
break;
case ACPI_IVAR_PRIVATE:
ad->ad_private = (void *)value;
break;
case ACPI_IVAR_FLAGS:
ad->ad_flags = (int)value;
break;
default:
panic("bad ivar write request (%d)", index);
return (ENOENT);
}
return (0);
}
/*
* Handle child resource allocation/removal
*/
static struct resource_list *
acpi_get_rlist(device_t dev, device_t child)
{
struct acpi_device *ad;
ad = device_get_ivars(child);
return (&ad->ad_rl);
}
static int
acpi_match_resource_hint(device_t dev, int type, long value)
{
struct acpi_device *ad = device_get_ivars(dev);
struct resource_list *rl = &ad->ad_rl;
struct resource_list_entry *rle;
STAILQ_FOREACH(rle, rl, link) {
if (rle->type != type)
continue;
if (rle->start <= value && rle->end >= value)
return (1);
}
return (0);
}
/*
* Wire device unit numbers based on resource matches in hints.
*/
static void
acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
int *unitp)
{
const char *s;
long value;
int line, matches, unit;
/*
* Iterate over all the hints for the devices with the specified
* name to see if one's resources are a subset of this device.
*/
line = 0;
for (;;) {
if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
break;
/* Must have an "at" for acpi or isa. */
resource_string_value(name, unit, "at", &s);
if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
continue;
/*
* Check for matching resources. We must have at least one match.
* Since I/O and memory resources cannot be shared, if we get a
* match on either of those, ignore any mismatches in IRQs or DRQs.
*
* XXX: We may want to revisit this to be more lenient and wire
* as long as it gets one match.
*/
matches = 0;
if (resource_long_value(name, unit, "port", &value) == 0) {
/*
* Floppy drive controllers are notorious for having a
* wide variety of resources not all of which include the
* first port that is specified by the hint (typically
* 0x3f0) (see the comment above fdc_isa_alloc_resources()
* in fdc_isa.c). However, they do all seem to include
* port + 2 (e.g. 0x3f2) so for a floppy device, look for
* 'value + 2' in the port resources instead of the hint
* value.
*/
if (strcmp(name, "fdc") == 0)
value += 2;
if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
matches++;
else
continue;
}
if (resource_long_value(name, unit, "maddr", &value) == 0) {
if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
matches++;
else
continue;
}
if (matches > 0)
goto matched;
if (resource_long_value(name, unit, "irq", &value) == 0) {
if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
matches++;
else
continue;
}
if (resource_long_value(name, unit, "drq", &value) == 0) {
if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
matches++;
else
continue;
}
matched:
if (matches > 0) {
/* We have a winner! */
*unitp = unit;
break;
}
}
}
/*
* Fech the NUMA domain for the given device.
*
* If a device has a _PXM method, map that to a NUMA domain.
*
* If none is found, then it'll call the parent method.
* If there's no domain, return ENOENT.
*/
int
acpi_get_domain(device_t dev, device_t child, int *domain)
{
#if MAXMEMDOM > 1
ACPI_HANDLE h;
int d, pxm;
h = acpi_get_handle(child);
if ((h != NULL) &&
ACPI_SUCCESS(acpi_GetInteger(h, "_PXM", &pxm))) {
d = acpi_map_pxm_to_vm_domainid(pxm);
if (d < 0)
return (ENOENT);
*domain = d;
return (0);
}
#endif
/* No _PXM node; go up a level */
return (bus_generic_get_domain(dev, child, domain));
}
/*
* Pre-allocate/manage all memory and IO resources. Since rman can't handle
* duplicates, we merge any in the sysresource attach routine.
*/
static int
acpi_sysres_alloc(device_t dev)
{
struct resource *res;
struct resource_list *rl;
struct resource_list_entry *rle;
struct rman *rm;
char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
device_t *children;
int child_count, i;
/*
* Probe/attach any sysresource devices. This would be unnecessary if we
* had multi-pass probe/attach.
*/
if (device_get_children(dev, &children, &child_count) != 0)
return (ENXIO);
for (i = 0; i < child_count; i++) {
if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
device_probe_and_attach(children[i]);
}
free(children, M_TEMP);
rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
STAILQ_FOREACH(rle, rl, link) {
if (rle->res != NULL) {
device_printf(dev, "duplicate resource for %lx\n", rle->start);
continue;
}
/* Only memory and IO resources are valid here. */
switch (rle->type) {
case SYS_RES_IOPORT:
rm = &acpi_rman_io;
break;
case SYS_RES_MEMORY:
rm = &acpi_rman_mem;
break;
default:
continue;
}
/* Pre-allocate resource and add to our rman pool. */
res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
&rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
if (res != NULL) {
rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
rle->res = res;
} else
device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
rle->start, rle->count, rle->type);
}
return (0);
}
static char *pcilink_ids[] = { "PNP0C0F", NULL };
static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
/*
* Reserve declared resources for devices found during attach once system
* resources have been allocated.
*/
static void
acpi_reserve_resources(device_t dev)
{
struct resource_list_entry *rle;
struct resource_list *rl;
struct acpi_device *ad;
struct acpi_softc *sc;
device_t *children;
int child_count, i;
sc = device_get_softc(dev);
if (device_get_children(dev, &children, &child_count) != 0)
return;
for (i = 0; i < child_count; i++) {
ad = device_get_ivars(children[i]);
rl = &ad->ad_rl;
/* Don't reserve system resources. */
if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
continue;
STAILQ_FOREACH(rle, rl, link) {
/*
* Don't reserve IRQ resources. There are many sticky things
* to get right otherwise (e.g. IRQs for psm, atkbd, and HPET
* when using legacy routing).
*/
if (rle->type == SYS_RES_IRQ)
continue;
/*
* Don't reserve the resource if it is already allocated.
* The acpi_ec(4) driver can allocate its resources early
* if ECDT is present.
*/
if (rle->res != NULL)
continue;
/*
* Try to reserve the resource from our parent. If this
* fails because the resource is a system resource, just
* let it be. The resource range is already reserved so
* that other devices will not use it. If the driver
* needs to allocate the resource, then
* acpi_alloc_resource() will sub-alloc from the system
* resource.
*/
resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid,
rle->start, rle->end, rle->count, 0);
}
}
free(children, M_TEMP);
sc->acpi_resources_reserved = 1;
}
static int
acpi_set_resource(device_t dev, device_t child, int type, int rid,
u_long start, u_long count)
{
struct acpi_softc *sc = device_get_softc(dev);
struct acpi_device *ad = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
ACPI_DEVICE_INFO *devinfo;
u_long end;
/* Ignore IRQ resources for PCI link devices. */
if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL)
return (0);
/*
* Ignore most resources for PCI root bridges. Some BIOSes
* incorrectly enumerate the memory ranges they decode as plain
* memory resources instead of as ResourceProducer ranges. Other
* BIOSes incorrectly list system resource entries for I/O ranges
* under the PCI bridge. Do allow the one known-correct case on
* x86 of a PCI bridge claiming the I/O ports used for PCI config
* access.
*/
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
if (ACPI_SUCCESS(AcpiGetObjectInfo(ad->ad_handle, &devinfo))) {
if ((devinfo->Flags & ACPI_PCI_ROOT_BRIDGE) != 0) {
#if defined(__i386__) || defined(__amd64__)
if (!(type == SYS_RES_IOPORT && start == CONF1_ADDR_PORT))
#endif
{
AcpiOsFree(devinfo);
return (0);
}
}
AcpiOsFree(devinfo);
}
}
/* If the resource is already allocated, fail. */
if (resource_list_busy(rl, type, rid))
return (EBUSY);
/* If the resource is already reserved, release it. */
if (resource_list_reserved(rl, type, rid))
resource_list_unreserve(rl, dev, child, type, rid);
/* Add the resource. */
end = (start + count - 1);
resource_list_add(rl, type, rid, start, end, count);
/* Don't reserve resources until the system resources are allocated. */
if (!sc->acpi_resources_reserved)
return (0);
/* Don't reserve system resources. */
if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL)
return (0);
/*
* Don't reserve IRQ resources. There are many sticky things to
* get right otherwise (e.g. IRQs for psm, atkbd, and HPET when
* using legacy routing).
*/
if (type == SYS_RES_IRQ)
return (0);
/*
* Reserve the resource.
*
* XXX: Ignores failure for now. Failure here is probably a
* BIOS/firmware bug?
*/
resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0);
return (0);
}
static struct resource *
acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
ACPI_RESOURCE ares;
struct acpi_device *ad;
struct resource_list_entry *rle;
struct resource_list *rl;
struct resource *res;
int isdefault = (start == 0UL && end == ~0UL);
/*
* First attempt at allocating the resource. For direct children,
* use resource_list_alloc() to handle reserved resources. For
* other devices, pass the request up to our parent.
*/
if (bus == device_get_parent(child)) {
ad = device_get_ivars(child);
rl = &ad->ad_rl;
/*
* Simulate the behavior of the ISA bus for direct children
* devices. That is, if a non-default range is specified for
* a resource that doesn't exist, use bus_set_resource() to
* add the resource before allocating it. Note that these
* resources will not be reserved.
*/
if (!isdefault && resource_list_find(rl, type, *rid) == NULL)
resource_list_add(rl, type, *rid, start, end, count);
res = resource_list_alloc(rl, bus, child, type, rid, start, end, count,
flags);
if (res != NULL && type == SYS_RES_IRQ) {
/*
* Since bus_config_intr() takes immediate effect, we cannot
* configure the interrupt associated with a device when we
* parse the resources but have to defer it until a driver
* actually allocates the interrupt via bus_alloc_resource().
*
* XXX: Should we handle the lookup failing?
*/
if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
acpi_config_intr(child, &ares);
}
/*
* If this is an allocation of the "default" range for a given
* RID, fetch the exact bounds for this resource from the
* resource list entry to try to allocate the range from the
* system resource regions.
*/
if (res == NULL && isdefault) {
rle = resource_list_find(rl, type, *rid);
if (rle != NULL) {
start = rle->start;
end = rle->end;
count = rle->count;
}
}
} else
res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
start, end, count, flags);
/*
* If the first attempt failed and this is an allocation of a
* specific range, try to satisfy the request via a suballocation
* from our system resource regions.
*/
if (res == NULL && start + count - 1 == end)
res = acpi_alloc_sysres(child, type, rid, start, end, count, flags);
return (res);
}
/*
* Attempt to allocate a specific resource range from the system
* resource ranges. Note that we only handle memory and I/O port
* system resources.
*/
struct resource *
acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end,
u_long count, u_int flags)
{
struct rman *rm;
struct resource *res;
switch (type) {
case SYS_RES_IOPORT:
rm = &acpi_rman_io;
break;
case SYS_RES_MEMORY:
rm = &acpi_rman_mem;
break;
default:
return (NULL);
}
KASSERT(start + count - 1 == end, ("wildcard resource range"));
res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
child);
if (res == NULL)
return (NULL);
rman_set_rid(res, *rid);
/* If requested, activate the resource using the parent's method. */
if (flags & RF_ACTIVE)
if (bus_activate_resource(child, type, *rid, res) != 0) {
rman_release_resource(res);
return (NULL);
}
return (res);
}
static int
acpi_is_resource_managed(int type, struct resource *r)
{
/* We only handle memory and IO resources through rman. */
switch (type) {
case SYS_RES_IOPORT:
return (rman_is_region_manager(r, &acpi_rman_io));
case SYS_RES_MEMORY:
return (rman_is_region_manager(r, &acpi_rman_mem));
}
return (0);
}
static int
acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
u_long start, u_long end)
{
if (acpi_is_resource_managed(type, r))
return (rman_adjust_resource(r, start, end));
return (bus_generic_adjust_resource(bus, child, type, r, start, end));
}
static int
acpi_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
int ret;
/*
* If this resource belongs to one of our internal managers,
* deactivate it and release it to the local pool.
*/
if (acpi_is_resource_managed(type, r)) {
if (rman_get_flags(r) & RF_ACTIVE) {
ret = bus_deactivate_resource(child, type, rid, r);
if (ret != 0)
return (ret);
}
return (rman_release_resource(r));
}
return (bus_generic_rl_release_resource(bus, child, type, rid, r));
}
static void
acpi_delete_resource(device_t bus, device_t child, int type, int rid)
{
struct resource_list *rl;
rl = acpi_get_rlist(bus, child);
if (resource_list_busy(rl, type, rid)) {
device_printf(bus, "delete_resource: Resource still owned by child"
" (type=%d, rid=%d)\n", type, rid);
return;
}
resource_list_unreserve(rl, bus, child, type, rid);
resource_list_delete(rl, type, rid);
}
/* Allocate an IO port or memory resource, given its GAS. */
int
acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
struct resource **res, u_int flags)
{
int error, res_type;
error = ENOMEM;
if (type == NULL || rid == NULL || gas == NULL || res == NULL)
return (EINVAL);
/* We only support memory and IO spaces. */
switch (gas->SpaceId) {
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
res_type = SYS_RES_MEMORY;
break;
case ACPI_ADR_SPACE_SYSTEM_IO:
res_type = SYS_RES_IOPORT;
break;
default:
return (EOPNOTSUPP);
}
/*
* If the register width is less than 8, assume the BIOS author means
* it is a bit field and just allocate a byte.
*/
if (gas->BitWidth && gas->BitWidth < 8)
gas->BitWidth = 8;
/* Validate the address after we're sure we support the space. */
if (gas->Address == 0 || gas->BitWidth == 0)
return (EINVAL);
bus_set_resource(dev, res_type, *rid, gas->Address,
gas->BitWidth / 8);
*res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
if (*res != NULL) {
*type = res_type;
error = 0;
} else
bus_delete_resource(dev, res_type, *rid);
return (error);
}
/* Probe _HID and _CID for compatible ISA PNP ids. */
static uint32_t
acpi_isa_get_logicalid(device_t dev)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
uint32_t pnpid;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/* Fetch and validate the HID. */
if ((h = acpi_get_handle(dev)) == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return_VALUE (0);
pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
PNP_EISAID(devinfo->HardwareId.String) : 0;
AcpiOsFree(devinfo);
return_VALUE (pnpid);
}
static int
acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_PNP_DEVICE_ID *ids;
ACPI_HANDLE h;
uint32_t *pnpid;
int i, valid;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
pnpid = cids;
/* Fetch and validate the CID */
if ((h = acpi_get_handle(dev)) == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return_VALUE (0);
if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
AcpiOsFree(devinfo);
return_VALUE (0);
}
if (devinfo->CompatibleIdList.Count < count)
count = devinfo->CompatibleIdList.Count;
ids = devinfo->CompatibleIdList.Ids;
for (i = 0, valid = 0; i < count; i++)
if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
strncmp(ids[i].String, "PNP", 3) == 0) {
*pnpid++ = PNP_EISAID(ids[i].String);
valid++;
}
AcpiOsFree(devinfo);
return_VALUE (valid);
}
static char *
acpi_device_id_probe(device_t bus, device_t dev, char **ids)
{
ACPI_HANDLE h;
ACPI_OBJECT_TYPE t;
int i;
h = acpi_get_handle(dev);
if (ids == NULL || h == NULL)
return (NULL);
t = acpi_get_type(dev);
if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
return (NULL);
/* Try to match one of the array of IDs with a HID or CID. */
for (i = 0; ids[i] != NULL; i++) {
if (acpi_MatchHid(h, ids[i]))
return (ids[i]);
}
return (NULL);
}
static ACPI_STATUS
acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
{
ACPI_HANDLE h;
if (dev == NULL)
h = ACPI_ROOT_OBJECT;
else if ((h = acpi_get_handle(dev)) == NULL)
return (AE_BAD_PARAMETER);
return (AcpiEvaluateObject(h, pathname, parameters, ret));
}
int
acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
{
struct acpi_softc *sc;
ACPI_HANDLE handle;
ACPI_STATUS status;
char sxd[8];
handle = acpi_get_handle(dev);
/*
* XXX If we find these devices, don't try to power them down.
* The serial and IRDA ports on my T23 hang the system when
* set to D3 and it appears that such legacy devices may
* need special handling in their drivers.
*/
if (dstate == NULL || handle == NULL ||
acpi_MatchHid(handle, "PNP0500") ||
acpi_MatchHid(handle, "PNP0501") ||
acpi_MatchHid(handle, "PNP0502") ||
acpi_MatchHid(handle, "PNP0510") ||
acpi_MatchHid(handle, "PNP0511"))
return (ENXIO);
/*
* Override next state with the value from _SxD, if present.
* Note illegal _S0D is evaluated because some systems expect this.
*/
sc = device_get_softc(bus);
snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
status = acpi_GetInteger(handle, sxd, dstate);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
device_printf(dev, "failed to get %s on %s: %s\n", sxd,
acpi_name(handle), AcpiFormatException(status));
return (ENXIO);
}
return (0);
}
/* Callback arg for our implementation of walking the namespace. */
struct acpi_device_scan_ctx {
acpi_scan_cb_t user_fn;
void *arg;
ACPI_HANDLE parent;
};
static ACPI_STATUS
acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
{
struct acpi_device_scan_ctx *ctx;
device_t dev, old_dev;
ACPI_STATUS status;
ACPI_OBJECT_TYPE type;
/*
* Skip this device if we think we'll have trouble with it or it is
* the parent where the scan began.
*/
ctx = (struct acpi_device_scan_ctx *)arg;
if (acpi_avoid(h) || h == ctx->parent)
return (AE_OK);
/* If this is not a valid device type (e.g., a method), skip it. */
if (ACPI_FAILURE(AcpiGetType(h, &type)))
return (AE_OK);
if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
return (AE_OK);
/*
* Call the user function with the current device. If it is unchanged
* afterwards, return. Otherwise, we update the handle to the new dev.
*/
old_dev = acpi_get_device(h);
dev = old_dev;
status = ctx->user_fn(h, &dev, level, ctx->arg);
if (ACPI_FAILURE(status) || old_dev == dev)
return (status);
/* Remove the old child and its connection to the handle. */
if (old_dev != NULL) {
device_delete_child(device_get_parent(old_dev), old_dev);
AcpiDetachData(h, acpi_fake_objhandler);
}
/* Recreate the handle association if the user created a device. */
if (dev != NULL)
AcpiAttachData(h, acpi_fake_objhandler, dev);
return (AE_OK);
}
static ACPI_STATUS
acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
acpi_scan_cb_t user_fn, void *arg)
{
ACPI_HANDLE h;
struct acpi_device_scan_ctx ctx;
if (acpi_disabled("children"))
return (AE_OK);
if (dev == NULL)
h = ACPI_ROOT_OBJECT;
else if ((h = acpi_get_handle(dev)) == NULL)
return (AE_BAD_PARAMETER);
ctx.user_fn = user_fn;
ctx.arg = arg;
ctx.parent = h;
return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
acpi_device_scan_cb, NULL, &ctx, NULL));
}
/*
* Even though ACPI devices are not PCI, we use the PCI approach for setting
* device power states since it's close enough to ACPI.
*/
static int
acpi_set_powerstate(device_t child, int state)
{
ACPI_HANDLE h;
ACPI_STATUS status;
h = acpi_get_handle(child);
if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
return (EINVAL);
if (h == NULL)
return (0);
/* Ignore errors if the power methods aren't present. */
status = acpi_pwr_switch_consumer(h, state);
if (ACPI_SUCCESS(status)) {
if (bootverbose)
device_printf(child, "set ACPI power state D%d on %s\n",
state, acpi_name(h));
} else if (status != AE_NOT_FOUND)
device_printf(child,
"failed to set ACPI power state D%d on %s: %s\n", state,
acpi_name(h), AcpiFormatException(status));
return (0);
}
static int
acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
{
int result, cid_count, i;
uint32_t lid, cids[8];
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/*
* ISA-style drivers attached to ACPI may persist and
* probe manually if we return ENOENT. We never want
* that to happen, so don't ever return it.
*/
result = ENXIO;
/* Scan the supplied IDs for a match */
lid = acpi_isa_get_logicalid(child);
cid_count = acpi_isa_get_compatid(child, cids, 8);
while (ids && ids->ip_id) {
if (lid == ids->ip_id) {
result = 0;
goto out;
}
for (i = 0; i < cid_count; i++) {
if (cids[i] == ids->ip_id) {
result = 0;
goto out;
}
}
ids++;
}
out:
if (result == 0 && ids->ip_desc)
device_set_desc(child, ids->ip_desc);
return_VALUE (result);
}
#if defined(__i386__) || defined(__amd64__)
/*
* Look for a MCFG table. If it is present, use the settings for
* domain (segment) 0 to setup PCI config space access via the memory
* map.
*/
static void
acpi_enable_pcie(void)
{
ACPI_TABLE_HEADER *hdr;
ACPI_MCFG_ALLOCATION *alloc, *end;
ACPI_STATUS status;
status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
if (ACPI_FAILURE(status))
return;
end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
while (alloc < end) {
if (alloc->PciSegment == 0) {
pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
alloc->EndBusNumber);
return;
}
alloc++;
}
}
#endif
/*
* Scan all of the ACPI namespace and attach child devices.
*
* We should only expect to find devices in the \_PR, \_TZ, \_SI, and
* \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
* However, in violation of the spec, some systems place their PCI link
* devices in \, so we have to walk the whole namespace. We check the
* type of namespace nodes, so this should be ok.
*/
static void
acpi_probe_children(device_t bus)
{
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/*
* Scan the namespace and insert placeholders for all the devices that
* we find. We also probe/attach any early devices.
*
* Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
* we want to create nodes for all devices, not just those that are
* currently present. (This assumes that we don't want to create/remove
* devices as they appear, which might be smarter.)
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
NULL, bus, NULL);
/* Pre-allocate resources for our rman from any sysresource devices. */
acpi_sysres_alloc(bus);
/* Reserve resources already allocated to children. */
acpi_reserve_resources(bus);
/* Create any static children by calling device identify methods. */
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
bus_generic_probe(bus);
/* Probe/attach all children, created statically and from the namespace. */
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
bus_generic_attach(bus);
/* Attach wake sysctls. */
acpi_wake_sysctl_walk(bus);
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
return_VOID;
}
/*
* Determine the probe order for a given device.
*/
static void
acpi_probe_order(ACPI_HANDLE handle, int *order)
{
ACPI_OBJECT_TYPE type;
/*
* 0. CPUs
* 1. I/O port and memory system resource holders
* 2. Clocks and timers (to handle early accesses)
* 3. Embedded controllers (to handle early accesses)
* 4. PCI Link Devices
*/
AcpiGetType(handle, &type);
if (type == ACPI_TYPE_PROCESSOR)
*order = 0;
else if (acpi_MatchHid(handle, "PNP0C01") ||
acpi_MatchHid(handle, "PNP0C02"))
*order = 1;
else if (acpi_MatchHid(handle, "PNP0100") ||
acpi_MatchHid(handle, "PNP0103") ||
acpi_MatchHid(handle, "PNP0B00"))
*order = 2;
else if (acpi_MatchHid(handle, "PNP0C09"))
*order = 3;
else if (acpi_MatchHid(handle, "PNP0C0F"))
*order = 4;
}
/*
* Evaluate a child device and determine whether we might attach a device to
* it.
*/
static ACPI_STATUS
acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
{
struct acpi_prw_data prw;
ACPI_OBJECT_TYPE type;
ACPI_HANDLE h;
device_t bus, child;
char *handle_str;
int order;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (acpi_disabled("children"))
return_ACPI_STATUS (AE_OK);
/* Skip this device if we think we'll have trouble with it. */
if (acpi_avoid(handle))
return_ACPI_STATUS (AE_OK);
bus = (device_t)context;
if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
handle_str = acpi_name(handle);
switch (type) {
case ACPI_TYPE_DEVICE:
/*
* Since we scan from \, be sure to skip system scope objects.
* \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
* BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
* during the intialization and \_TZ_ is to support Notify() on it.
*/
if (strcmp(handle_str, "\\_SB_") == 0 ||
strcmp(handle_str, "\\_TZ_") == 0)
break;
if (acpi_parse_prw(handle, &prw) == 0)
AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit);
/*
* Ignore devices that do not have a _HID or _CID. They should
* be discovered by other buses (e.g. the PCI bus driver).
*/
if (!acpi_has_hid(handle))
break;
/* FALLTHROUGH */
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_POWER:
/*
* Create a placeholder device for this node. Sort the
* placeholder so that the probe/attach passes will run
* breadth-first. Orders less than ACPI_DEV_BASE_ORDER
* are reserved for special objects (i.e., system
* resources).
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
order = level * 10 + ACPI_DEV_BASE_ORDER;
acpi_probe_order(handle, &order);
child = BUS_ADD_CHILD(bus, order, NULL, -1);
if (child == NULL)
break;
/* Associate the handle with the device_t and vice versa. */
acpi_set_handle(child, handle);
AcpiAttachData(handle, acpi_fake_objhandler, child);
/*
* Check that the device is present. If it's not present,
* leave it disabled (so that we have a device_t attached to
* the handle, but we don't probe it).
*
* XXX PCI link devices sometimes report "present" but not
* "functional" (i.e. if disabled). Go ahead and probe them
* anyway since we may enable them later.
*/
if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
/* Never disable PCI link devices. */
if (acpi_MatchHid(handle, "PNP0C0F"))
break;
/*
* Docking stations should remain enabled since the system
* may be undocked at boot.
*/
if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
break;
device_disable(child);
break;
}
/*
* Get the device's resource settings and attach them.
* Note that if the device has _PRS but no _CRS, we need
* to decide when it's appropriate to try to configure the
* device. Ignore the return value here; it's OK for the
* device not to have any resources.
*/
acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
break;
}
}
return_ACPI_STATUS (AE_OK);
}
/*
* AcpiAttachData() requires an object handler but never uses it. This is a
* placeholder object handler so we can store a device_t in an ACPI_HANDLE.
*/
void
acpi_fake_objhandler(ACPI_HANDLE h, void *data)
{
}
static void
acpi_shutdown_final(void *arg, int howto)
{
struct acpi_softc *sc = (struct acpi_softc *)arg;
register_t intr;
ACPI_STATUS status;
/*
* XXX Shutdown code should only run on the BSP (cpuid 0).
* Some chipsets do not power off the system correctly if called from
* an AP.
*/
if ((howto & RB_POWEROFF) != 0) {
status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
AcpiFormatException(status));
return;
}
device_printf(sc->acpi_dev, "Powering system off\n");
intr = intr_disable();
status = AcpiEnterSleepState(ACPI_STATE_S5);
if (ACPI_FAILURE(status)) {
intr_restore(intr);
device_printf(sc->acpi_dev, "power-off failed - %s\n",
AcpiFormatException(status));
} else {
DELAY(1000000);
intr_restore(intr);
device_printf(sc->acpi_dev, "power-off failed - timeout\n");
}
} else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
/* Reboot using the reset register. */
status = AcpiReset();
if (ACPI_SUCCESS(status)) {
DELAY(1000000);
device_printf(sc->acpi_dev, "reset failed - timeout\n");
} else if (status != AE_NOT_EXIST)
device_printf(sc->acpi_dev, "reset failed - %s\n",
AcpiFormatException(status));
} else if (sc->acpi_do_disable && panicstr == NULL) {
/*
* Only disable ACPI if the user requested. On some systems, writing
* the disable value to SMI_CMD hangs the system.
*/
device_printf(sc->acpi_dev, "Shutting down\n");
AcpiTerminate();
}
}
static void
acpi_enable_fixed_events(struct acpi_softc *sc)
{
static int first_time = 1;
/* Enable and clear fixed events and install handlers. */
if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
acpi_event_power_button_sleep, sc);
if (first_time)
device_printf(sc->acpi_dev, "Power Button (fixed)\n");
}
if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
acpi_event_sleep_button_sleep, sc);
if (first_time)
device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
}
first_time = 0;
}
/*
* Returns true if the device is actually present and should
* be attached to. This requires the present, enabled, UI-visible
* and diagnostics-passed bits to be set.
*/
BOOLEAN
acpi_DeviceIsPresent(device_t dev)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
BOOLEAN present;
if ((h = acpi_get_handle(dev)) == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return (FALSE);
/* If no _STA method, must be present */
present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
AcpiOsFree(devinfo);
return (present);
}
/*
* Returns true if the battery is actually present and inserted.
*/
BOOLEAN
acpi_BatteryIsPresent(device_t dev)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
BOOLEAN present;
if ((h = acpi_get_handle(dev)) == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return (FALSE);
/* If no _STA method, must be present */
present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
AcpiOsFree(devinfo);
return (present);
}
/*
* Returns true if a device has at least one valid device ID.
*/
static BOOLEAN
acpi_has_hid(ACPI_HANDLE h)
{
ACPI_DEVICE_INFO *devinfo;
BOOLEAN ret;
if (h == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return (FALSE);
ret = FALSE;
if ((devinfo->Valid & ACPI_VALID_HID) != 0)
ret = TRUE;
else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
if (devinfo->CompatibleIdList.Count > 0)
ret = TRUE;
AcpiOsFree(devinfo);
return (ret);
}
/*
* Match a HID string against a handle
*/
BOOLEAN
acpi_MatchHid(ACPI_HANDLE h, const char *hid)
{
ACPI_DEVICE_INFO *devinfo;
BOOLEAN ret;
int i;
if (hid == NULL || h == NULL ||
ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
return (FALSE);
ret = FALSE;
if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
strcmp(hid, devinfo->HardwareId.String) == 0)
ret = TRUE;
else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
ret = TRUE;
break;
}
}
AcpiOsFree(devinfo);
return (ret);
}
/*
* Return the handle of a named object within our scope, ie. that of (parent)
* or one if its parents.
*/
ACPI_STATUS
acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
{
ACPI_HANDLE r;
ACPI_STATUS status;
/* Walk back up the tree to the root */
for (;;) {
status = AcpiGetHandle(parent, path, &r);
if (ACPI_SUCCESS(status)) {
*result = r;
return (AE_OK);
}
/* XXX Return error here? */
if (status != AE_NOT_FOUND)
return (AE_OK);
if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
return (AE_NOT_FOUND);
parent = r;
}
}
/*
* Allocate a buffer with a preset data size.
*/
ACPI_BUFFER *
acpi_AllocBuffer(int size)
{
ACPI_BUFFER *buf;
if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
return (NULL);
buf->Length = size;
buf->Pointer = (void *)(buf + 1);
return (buf);
}
ACPI_STATUS
acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
{
ACPI_OBJECT arg1;
ACPI_OBJECT_LIST args;
arg1.Type = ACPI_TYPE_INTEGER;
arg1.Integer.Value = number;
args.Count = 1;
args.Pointer = &arg1;
return (AcpiEvaluateObject(handle, path, &args, NULL));
}
/*
* Evaluate a path that should return an integer.
*/
ACPI_STATUS
acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
{
ACPI_STATUS status;
ACPI_BUFFER buf;
ACPI_OBJECT param;
if (handle == NULL)
handle = ACPI_ROOT_OBJECT;
/*
* Assume that what we've been pointed at is an Integer object, or
* a method that will return an Integer.
*/
buf.Pointer = &param;
buf.Length = sizeof(param);
status = AcpiEvaluateObject(handle, path, NULL, &buf);
if (ACPI_SUCCESS(status)) {
if (param.Type == ACPI_TYPE_INTEGER)
*number = param.Integer.Value;
else
status = AE_TYPE;
}
/*
* In some applications, a method that's expected to return an Integer
* may instead return a Buffer (probably to simplify some internal
* arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
* convert it into an Integer as best we can.
*
* This is a hack.
*/
if (status == AE_BUFFER_OVERFLOW) {
if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
status = AE_NO_MEMORY;
} else {
status = AcpiEvaluateObject(handle, path, NULL, &buf);
if (ACPI_SUCCESS(status))
status = acpi_ConvertBufferToInteger(&buf, number);
AcpiOsFree(buf.Pointer);
}
}
return (status);
}
ACPI_STATUS
acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
{
ACPI_OBJECT *p;
UINT8 *val;
int i;
p = (ACPI_OBJECT *)bufp->Pointer;
if (p->Type == ACPI_TYPE_INTEGER) {
*number = p->Integer.Value;
return (AE_OK);
}
if (p->Type != ACPI_TYPE_BUFFER)
return (AE_TYPE);
if (p->Buffer.Length > sizeof(int))
return (AE_BAD_DATA);
*number = 0;
val = p->Buffer.Pointer;
for (i = 0; i < p->Buffer.Length; i++)
*number += val[i] << (i * 8);
return (AE_OK);
}
/*
* Iterate over the elements of an a package object, calling the supplied
* function for each element.
*
* XXX possible enhancement might be to abort traversal on error.
*/
ACPI_STATUS
acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
{
ACPI_OBJECT *comp;
int i;
if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
return (AE_BAD_PARAMETER);
/* Iterate over components */
i = 0;
comp = pkg->Package.Elements;
for (; i < pkg->Package.Count; i++, comp++)
func(comp, arg);
return (AE_OK);
}
/*
* Find the (index)th resource object in a set.
*/
ACPI_STATUS
acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
{
ACPI_RESOURCE *rp;
int i;
rp = (ACPI_RESOURCE *)buf->Pointer;
i = index;
while (i-- > 0) {
/* Range check */
if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
return (AE_BAD_PARAMETER);
/* Check for terminator */
if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
return (AE_NOT_FOUND);
rp = ACPI_NEXT_RESOURCE(rp);
}
if (resp != NULL)
*resp = rp;
return (AE_OK);
}
/*
* Append an ACPI_RESOURCE to an ACPI_BUFFER.
*
* Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
* provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
* backing block. If the ACPI_RESOURCE is NULL, return an empty set of
* resources.
*/
#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
ACPI_STATUS
acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
{
ACPI_RESOURCE *rp;
void *newp;
/* Initialise the buffer if necessary. */
if (buf->Pointer == NULL) {
buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
return (AE_NO_MEMORY);
rp = (ACPI_RESOURCE *)buf->Pointer;
rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
rp->Length = ACPI_RS_SIZE_MIN;
}
if (res == NULL)
return (AE_OK);
/*
* Scan the current buffer looking for the terminator.
* This will either find the terminator or hit the end
* of the buffer and return an error.
*/
rp = (ACPI_RESOURCE *)buf->Pointer;
for (;;) {
/* Range check, don't go outside the buffer */
if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
return (AE_BAD_PARAMETER);
if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
break;
rp = ACPI_NEXT_RESOURCE(rp);
}
/*
* Check the size of the buffer and expand if required.
*
* Required size is:
* size of existing resources before terminator +
* size of new resource and header +
* size of terminator.
*
* Note that this loop should really only run once, unless
* for some reason we are stuffing a *really* huge resource.
*/
while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
res->Length + ACPI_RS_SIZE_NO_DATA +
ACPI_RS_SIZE_MIN) >= buf->Length) {
if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
return (AE_NO_MEMORY);
bcopy(buf->Pointer, newp, buf->Length);
rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
AcpiOsFree(buf->Pointer);
buf->Pointer = newp;
buf->Length += buf->Length;
}
/* Insert the new resource. */
bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
/* And add the terminator. */
rp = ACPI_NEXT_RESOURCE(rp);
rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
rp->Length = ACPI_RS_SIZE_MIN;
return (AE_OK);
}
/*
* Set interrupt model.
*/
ACPI_STATUS
acpi_SetIntrModel(int model)
{
return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
}
/*
* Walk subtables of a table and call a callback routine for each
* subtable. The caller should provide the first subtable and a
* pointer to the end of the table. This can be used to walk tables
* such as MADT and SRAT that use subtable entries.
*/
void
acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
void *arg)
{
ACPI_SUBTABLE_HEADER *entry;
for (entry = first; (void *)entry < end; ) {
/* Avoid an infinite loop if we hit a bogus entry. */
if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
return;
handler(entry, arg);
entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
}
}
/*
* DEPRECATED. This interface has serious deficiencies and will be
* removed.
*
* Immediately enter the sleep state. In the old model, acpiconf(8) ran
* rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
*/
ACPI_STATUS
acpi_SetSleepState(struct acpi_softc *sc, int state)
{
static int once;
if (!once) {
device_printf(sc->acpi_dev,
"warning: acpi_SetSleepState() deprecated, need to update your software\n");
once = 1;
}
return (acpi_EnterSleepState(sc, state));
}
#if defined(__amd64__) || defined(__i386__)
static void
acpi_sleep_force_task(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
sc->acpi_next_sstate);
}
static void
acpi_sleep_force(void *arg)
{
struct acpi_softc *sc = (struct acpi_softc *)arg;
device_printf(sc->acpi_dev,
"suspend request timed out, forcing sleep now\n");
/*
* XXX Suspending from callout causes freezes in DEVICE_SUSPEND().
* Suspend from acpi_task thread instead.
*/
if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_sleep_force_task, sc)))
device_printf(sc->acpi_dev, "AcpiOsExecute() for sleeping failed\n");
}
#endif
/*
* Request that the system enter the given suspend state. All /dev/apm
* devices and devd(8) will be notified. Userland then has a chance to
* save state and acknowledge the request. The system sleeps once all
* acks are in.
*/
int
acpi_ReqSleepState(struct acpi_softc *sc, int state)
{
#if defined(__amd64__) || defined(__i386__)
struct apm_clone_data *clone;
ACPI_STATUS status;
if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
return (EINVAL);
if (!acpi_sleep_states[state])
return (EOPNOTSUPP);
/* If a suspend request is already in progress, just return. */
if (sc->acpi_next_sstate != 0) {
return (0);
}
/* Wait until sleep is enabled. */
while (sc->acpi_sleep_disabled) {
AcpiOsSleep(1000);
}
ACPI_LOCK(acpi);
sc->acpi_next_sstate = state;
/* S5 (soft-off) should be entered directly with no waiting. */
if (state == ACPI_STATE_S5) {
ACPI_UNLOCK(acpi);
status = acpi_EnterSleepState(sc, state);
return (ACPI_SUCCESS(status) ? 0 : ENXIO);
}
/* Record the pending state and notify all apm devices. */
STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
clone->notify_status = APM_EV_NONE;
if ((clone->flags & ACPI_EVF_DEVD) == 0) {
selwakeuppri(&clone->sel_read, PZERO);
KNOTE_LOCKED(&clone->sel_read.si_note, 0);
}
}
/* If devd(8) is not running, immediately enter the sleep state. */
if (!devctl_process_running()) {
ACPI_UNLOCK(acpi);
status = acpi_EnterSleepState(sc, state);
return (ACPI_SUCCESS(status) ? 0 : ENXIO);
}
/*
* Set a timeout to fire if userland doesn't ack the suspend request
* in time. This way we still eventually go to sleep if we were
* overheating or running low on battery, even if userland is hung.
* We cancel this timeout once all userland acks are in or the
* suspend request is aborted.
*/
callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
ACPI_UNLOCK(acpi);
/* Now notify devd(8) also. */
acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
return (0);
#else
/* This platform does not support acpi suspend/resume. */
return (EOPNOTSUPP);
#endif
}
/*
* Acknowledge (or reject) a pending sleep state. The caller has
* prepared for suspend and is now ready for it to proceed. If the
* error argument is non-zero, it indicates suspend should be cancelled
* and gives an errno value describing why. Once all votes are in,
* we suspend the system.
*/
int
acpi_AckSleepState(struct apm_clone_data *clone, int error)
{
#if defined(__amd64__) || defined(__i386__)
struct acpi_softc *sc;
int ret, sleeping;
/* If no pending sleep state, return an error. */
ACPI_LOCK(acpi);
sc = clone->acpi_sc;
if (sc->acpi_next_sstate == 0) {
ACPI_UNLOCK(acpi);
return (ENXIO);
}
/* Caller wants to abort suspend process. */
if (error) {
sc->acpi_next_sstate = 0;
callout_stop(&sc->susp_force_to);
device_printf(sc->acpi_dev,
"listener on %s cancelled the pending suspend\n",
devtoname(clone->cdev));
ACPI_UNLOCK(acpi);
return (0);
}
/*
* Mark this device as acking the suspend request. Then, walk through
* all devices, seeing if they agree yet. We only count devices that
* are writable since read-only devices couldn't ack the request.
*/
sleeping = TRUE;
clone->notify_status = APM_EV_ACKED;
STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
clone->notify_status != APM_EV_ACKED) {
sleeping = FALSE;
break;
}
}
/* If all devices have voted "yes", we will suspend now. */
if (sleeping)
callout_stop(&sc->susp_force_to);
ACPI_UNLOCK(acpi);
ret = 0;
if (sleeping) {
if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
ret = ENODEV;
}
return (ret);
#else
/* This platform does not support acpi suspend/resume. */
return (EOPNOTSUPP);
#endif
}
static void
acpi_sleep_enable(void *arg)
{
struct acpi_softc *sc = (struct acpi_softc *)arg;
ACPI_LOCK_ASSERT(acpi);
/* Reschedule if the system is not fully up and running. */
if (!AcpiGbl_SystemAwakeAndRunning) {
callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
return;
}
sc->acpi_sleep_disabled = FALSE;
}
static ACPI_STATUS
acpi_sleep_disable(struct acpi_softc *sc)
{
ACPI_STATUS status;
/* Fail if the system is not fully up and running. */
if (!AcpiGbl_SystemAwakeAndRunning)
return (AE_ERROR);
ACPI_LOCK(acpi);
status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
sc->acpi_sleep_disabled = TRUE;
ACPI_UNLOCK(acpi);
return (status);
}
enum acpi_sleep_state {
ACPI_SS_NONE,
ACPI_SS_GPE_SET,
ACPI_SS_DEV_SUSPEND,
ACPI_SS_SLP_PREP,
ACPI_SS_SLEPT,
};
/*
* Enter the desired system sleep state.
*
* Currently we support S1-S5 but S4 is only S4BIOS
*/
static ACPI_STATUS
acpi_EnterSleepState(struct acpi_softc *sc, int state)
{
register_t intr;
ACPI_STATUS status;
ACPI_EVENT_STATUS power_button_status;
enum acpi_sleep_state slp_state;
int sleep_result;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
return_ACPI_STATUS (AE_BAD_PARAMETER);
if (!acpi_sleep_states[state]) {
device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
state);
return (AE_SUPPORT);
}
/* Re-entry once we're suspending is not allowed. */
status = acpi_sleep_disable(sc);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev,
"suspend request ignored (not ready yet)\n");
return (status);
}
if (state == ACPI_STATE_S5) {
/*
* Shut down cleanly and power off. This will call us back through the
* shutdown handlers.
*/
shutdown_nice(RB_POWEROFF);
return_ACPI_STATUS (AE_OK);
}
EVENTHANDLER_INVOKE(power_suspend_early);
stop_all_proc();
EVENTHANDLER_INVOKE(power_suspend);
if (smp_started) {
thread_lock(curthread);
sched_bind(curthread, 0);
thread_unlock(curthread);
}
/*
* Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
* drivers need this.
*/
mtx_lock(&Giant);
slp_state = ACPI_SS_NONE;
sc->acpi_sstate = state;
/* Enable any GPEs as appropriate and requested by the user. */
acpi_wake_prep_walk(state);
slp_state = ACPI_SS_GPE_SET;
/*
* Inform all devices that we are going to sleep. If at least one
* device fails, DEVICE_SUSPEND() automatically resumes the tree.
*
* XXX Note that a better two-pass approach with a 'veto' pass
* followed by a "real thing" pass would be better, but the current
* bus interface does not provide for this.
*/
if (DEVICE_SUSPEND(root_bus) != 0) {
device_printf(sc->acpi_dev, "device_suspend failed\n");
goto backout;
}
slp_state = ACPI_SS_DEV_SUSPEND;
/* If testing device suspend only, back out of everything here. */
if (acpi_susp_bounce)
goto backout;
status = AcpiEnterSleepStatePrep(state);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
AcpiFormatException(status));
goto backout;
}
slp_state = ACPI_SS_SLP_PREP;
if (sc->acpi_sleep_delay > 0)
DELAY(sc->acpi_sleep_delay * 1000000);
intr = intr_disable();
if (state != ACPI_STATE_S1) {
sleep_result = acpi_sleep_machdep(sc, state);
acpi_wakeup_machdep(sc, state, sleep_result, 0);
/*
* XXX According to ACPI specification SCI_EN bit should be restored
* by ACPI platform (BIOS, firmware) to its pre-sleep state.
* Unfortunately some BIOSes fail to do that and that leads to
* unexpected and serious consequences during wake up like a system
* getting stuck in SMI handlers.
* This hack is picked up from Linux, which claims that it follows
* Windows behavior.
*/
if (sleep_result == 1 && state != ACPI_STATE_S4)
AcpiWriteBitRegister(ACPI_BITREG_SCI_ENABLE, ACPI_ENABLE_EVENT);
AcpiLeaveSleepStatePrep(state);
if (sleep_result == 1 && state == ACPI_STATE_S3) {
/*
* Prevent mis-interpretation of the wakeup by power button
* as a request for power off.
* Ideally we should post an appropriate wakeup event,
* perhaps using acpi_event_power_button_wake or alike.
*
* Clearing of power button status after wakeup is mandated
* by ACPI specification in section "Fixed Power Button".
*
* XXX As of ACPICA 20121114 AcpiGetEventStatus provides
* status as 0/1 corressponding to inactive/active despite
* its type being ACPI_EVENT_STATUS. In other words,
* we should not test for ACPI_EVENT_FLAG_SET for time being.
*/
if (ACPI_SUCCESS(AcpiGetEventStatus(ACPI_EVENT_POWER_BUTTON,
&power_button_status)) && power_button_status != 0) {
AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
device_printf(sc->acpi_dev,
"cleared fixed power button status\n");
}
}
intr_restore(intr);
/* call acpi_wakeup_machdep() again with interrupt enabled */
acpi_wakeup_machdep(sc, state, sleep_result, 1);
if (sleep_result == -1)
goto backout;
/* Re-enable ACPI hardware on wakeup from sleep state 4. */
if (state == ACPI_STATE_S4)
AcpiEnable();
} else {
status = AcpiEnterSleepState(state);
AcpiLeaveSleepStatePrep(state);
intr_restore(intr);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
AcpiFormatException(status));
goto backout;
}
}
slp_state = ACPI_SS_SLEPT;
/*
* Back out state according to how far along we got in the suspend
* process. This handles both the error and success cases.
*/
backout:
if (slp_state >= ACPI_SS_GPE_SET) {
acpi_wake_prep_walk(state);
sc->acpi_sstate = ACPI_STATE_S0;
}
if (slp_state >= ACPI_SS_DEV_SUSPEND)
DEVICE_RESUME(root_bus);
if (slp_state >= ACPI_SS_SLP_PREP)
AcpiLeaveSleepState(state);
if (slp_state >= ACPI_SS_SLEPT) {
acpi_resync_clock(sc);
acpi_enable_fixed_events(sc);
}
sc->acpi_next_sstate = 0;
mtx_unlock(&Giant);
if (smp_started) {
thread_lock(curthread);
sched_unbind(curthread);
thread_unlock(curthread);
}
resume_all_proc();
EVENTHANDLER_INVOKE(power_resume);
/* Allow another sleep request after a while. */
callout_schedule(&acpi_sleep_timer, hz * ACPI_MINIMUM_AWAKETIME);
/* Run /etc/rc.resume after we are back. */
if (devctl_process_running())
acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
return_ACPI_STATUS (status);
}
static void
acpi_resync_clock(struct acpi_softc *sc)
{
#ifdef __amd64__
if (!acpi_reset_clock)
return;
/*
* Warm up timecounter again and reset system clock.
*/
(void)timecounter->tc_get_timecount(timecounter);
(void)timecounter->tc_get_timecount(timecounter);
inittodr(time_second + sc->acpi_sleep_delay);
#endif
}
/* Enable or disable the device's wake GPE. */
int
acpi_wake_set_enable(device_t dev, int enable)
{
struct acpi_prw_data prw;
ACPI_STATUS status;
int flags;
/* Make sure the device supports waking the system and get the GPE. */
if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
return (ENXIO);
flags = acpi_get_flags(dev);
if (enable) {
status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
ACPI_GPE_ENABLE);
if (ACPI_FAILURE(status)) {
device_printf(dev, "enable wake failed\n");
return (ENXIO);
}
acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
} else {
status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit,
ACPI_GPE_DISABLE);
if (ACPI_FAILURE(status)) {
device_printf(dev, "disable wake failed\n");
return (ENXIO);
}
acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
}
return (0);
}
static int
acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
{
struct acpi_prw_data prw;
device_t dev;
/* Check that this is a wake-capable device and get its GPE. */
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
dev = acpi_get_device(handle);
/*
* The destination sleep state must be less than (i.e., higher power)
* or equal to the value specified by _PRW. If this GPE cannot be
* enabled for the next sleep state, then disable it. If it can and
* the user requested it be enabled, turn on any required power resources
* and set _PSW.
*/
if (sstate > prw.lowest_wake) {
AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
if (bootverbose)
device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
acpi_name(handle), sstate);
} else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
acpi_pwr_wake_enable(handle, 1);
acpi_SetInteger(handle, "_PSW", 1);
if (bootverbose)
device_printf(dev, "wake_prep enabled for %s (S%d)\n",
acpi_name(handle), sstate);
}
return (0);
}
static int
acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
{
struct acpi_prw_data prw;
device_t dev;
/*
* Check that this is a wake-capable device and get its GPE. Return
* now if the user didn't enable this device for wake.
*/
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
dev = acpi_get_device(handle);
if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
return (0);
/*
* If this GPE couldn't be enabled for the previous sleep state, it was
* disabled before going to sleep so re-enable it. If it was enabled,
* clear _PSW and turn off any power resources it used.
*/
if (sstate > prw.lowest_wake) {
AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
if (bootverbose)
device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
} else {
acpi_SetInteger(handle, "_PSW", 0);
acpi_pwr_wake_enable(handle, 0);
if (bootverbose)
device_printf(dev, "run_prep cleaned up for %s\n",
acpi_name(handle));
}
return (0);
}
static ACPI_STATUS
acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
{
int sstate;
/* If suspending, run the sleep prep function, otherwise wake. */
sstate = *(int *)context;
if (AcpiGbl_SystemAwakeAndRunning)
acpi_wake_sleep_prep(handle, sstate);
else
acpi_wake_run_prep(handle, sstate);
return (AE_OK);
}
/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
static int
acpi_wake_prep_walk(int sstate)
{
ACPI_HANDLE sb_handle;
if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
acpi_wake_prep, NULL, &sstate, NULL);
return (0);
}
/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
static int
acpi_wake_sysctl_walk(device_t dev)
{
int error, i, numdevs;
device_t *devlist;
device_t child;
ACPI_STATUS status;
error = device_get_children(dev, &devlist, &numdevs);
if (error != 0 || numdevs == 0) {
if (numdevs == 0)
free(devlist, M_TEMP);
return (error);
}
for (i = 0; i < numdevs; i++) {
child = devlist[i];
acpi_wake_sysctl_walk(child);
if (!device_is_attached(child))
continue;
status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
if (ACPI_SUCCESS(status)) {
SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
"wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
acpi_wake_set_sysctl, "I", "Device set to wake the system");
}
}
free(devlist, M_TEMP);
return (0);
}
/* Enable or disable wake from userland. */
static int
acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
{
int enable, error;
device_t dev;
dev = (device_t)arg1;
enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
error = sysctl_handle_int(oidp, &enable, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (enable != 0 && enable != 1)
return (EINVAL);
return (acpi_wake_set_enable(dev, enable));
}
/* Parse a device's _PRW into a structure. */
int
acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
{
ACPI_STATUS status;
ACPI_BUFFER prw_buffer;
ACPI_OBJECT *res, *res2;
int error, i, power_count;
if (h == NULL || prw == NULL)
return (EINVAL);
/*
* The _PRW object (7.2.9) is only required for devices that have the
* ability to wake the system from a sleeping state.
*/
error = EINVAL;
prw_buffer.Pointer = NULL;
prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
if (ACPI_FAILURE(status))
return (ENOENT);
res = (ACPI_OBJECT *)prw_buffer.Pointer;
if (res == NULL)
return (ENOENT);
if (!ACPI_PKG_VALID(res, 2))
goto out;
/*
* Element 1 of the _PRW object:
* The lowest power system sleeping state that can be entered while still
* providing wake functionality. The sleeping state being entered must
* be less than (i.e., higher power) or equal to this value.
*/
if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
goto out;
/*
* Element 0 of the _PRW object:
*/
switch (res->Package.Elements[0].Type) {
case ACPI_TYPE_INTEGER:
/*
* If the data type of this package element is numeric, then this
* _PRW package element is the bit index in the GPEx_EN, in the
* GPE blocks described in the FADT, of the enable bit that is
* enabled for the wake event.
*/
prw->gpe_handle = NULL;
prw->gpe_bit = res->Package.Elements[0].Integer.Value;
error = 0;
break;
case ACPI_TYPE_PACKAGE:
/*
* If the data type of this package element is a package, then this
* _PRW package element is itself a package containing two
* elements. The first is an object reference to the GPE Block
* device that contains the GPE that will be triggered by the wake
* event. The second element is numeric and it contains the bit
* index in the GPEx_EN, in the GPE Block referenced by the
* first element in the package, of the enable bit that is enabled for
* the wake event.
*
* For example, if this field is a package then it is of the form:
* Package() {\_SB.PCI0.ISA.GPE, 2}
*/
res2 = &res->Package.Elements[0];
if (!ACPI_PKG_VALID(res2, 2))
goto out;
prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
if (prw->gpe_handle == NULL)
goto out;
if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
goto out;
error = 0;
break;
default:
goto out;
}
/* Elements 2 to N of the _PRW object are power resources. */
power_count = res->Package.Count - 2;
if (power_count > ACPI_PRW_MAX_POWERRES) {
printf("ACPI device %s has too many power resources\n", acpi_name(h));
power_count = 0;
}
prw->power_res_count = power_count;
for (i = 0; i < power_count; i++)
prw->power_res[i] = res->Package.Elements[i];
out:
if (prw_buffer.Pointer != NULL)
AcpiOsFree(prw_buffer.Pointer);
return (error);
}
/*
* ACPI Event Handlers
*/
/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
static void
acpi_system_eventhandler_sleep(void *arg, int state)
{
struct acpi_softc *sc = (struct acpi_softc *)arg;
int ret;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
/* Check if button action is disabled or unknown. */
if (state == ACPI_STATE_UNKNOWN)
return;
/* Request that the system prepare to enter the given suspend state. */
ret = acpi_ReqSleepState(sc, state);
if (ret != 0)
device_printf(sc->acpi_dev,
"request to enter state S%d failed (err %d)\n", state, ret);
return_VOID;
}
static void
acpi_system_eventhandler_wakeup(void *arg, int state)
{
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
/* Currently, nothing to do for wakeup. */
return_VOID;
}
/*
* ACPICA Event Handlers (FixedEvent, also called from button notify handler)
*/
static void
acpi_invoke_sleep_eventhandler(void *context)
{
EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context);
}
static void
acpi_invoke_wake_eventhandler(void *context)
{
EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context);
}
UINT32
acpi_event_power_button_sleep(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx)))
return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
return_VALUE (ACPI_INTERRUPT_HANDLED);
}
UINT32
acpi_event_power_button_wake(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx)))
return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
return_VALUE (ACPI_INTERRUPT_HANDLED);
}
UINT32
acpi_event_sleep_button_sleep(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx)))
return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
return_VALUE (ACPI_INTERRUPT_HANDLED);
}
UINT32
acpi_event_sleep_button_wake(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER,
acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx)))
return_VALUE (ACPI_INTERRUPT_NOT_HANDLED);
return_VALUE (ACPI_INTERRUPT_HANDLED);
}
/*
* XXX This static buffer is suboptimal. There is no locking so only
* use this for single-threaded callers.
*/
char *
acpi_name(ACPI_HANDLE handle)
{
ACPI_BUFFER buf;
static char data[256];
buf.Length = sizeof(data);
buf.Pointer = data;
if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
return (data);
return ("(unknown)");
}
/*
* Debugging/bug-avoidance. Avoid trying to fetch info on various
* parts of the namespace.
*/
int
acpi_avoid(ACPI_HANDLE handle)
{
char *cp, *env, *np;
int len;
np = acpi_name(handle);
if (*np == '\\')
np++;
if ((env = kern_getenv("debug.acpi.avoid")) == NULL)
return (0);
/* Scan the avoid list checking for a match */
cp = env;
for (;;) {
while (*cp != 0 && isspace(*cp))
cp++;
if (*cp == 0)
break;
len = 0;
while (cp[len] != 0 && !isspace(cp[len]))
len++;
if (!strncmp(cp, np, len)) {
freeenv(env);
return(1);
}
cp += len;
}
freeenv(env);
return (0);
}
/*
* Debugging/bug-avoidance. Disable ACPI subsystem components.
*/
int
acpi_disabled(char *subsys)
{
char *cp, *env;
int len;
if ((env = kern_getenv("debug.acpi.disabled")) == NULL)
return (0);
if (strcmp(env, "all") == 0) {
freeenv(env);
return (1);
}
/* Scan the disable list, checking for a match. */
cp = env;
for (;;) {
while (*cp != '\0' && isspace(*cp))
cp++;
if (*cp == '\0')
break;
len = 0;
while (cp[len] != '\0' && !isspace(cp[len]))
len++;
if (strncmp(cp, subsys, len) == 0) {
freeenv(env);
return (1);
}
cp += len;
}
freeenv(env);
return (0);
}
/*
* Control interface.
*
* We multiplex ioctls for all participating ACPI devices here. Individual
* drivers wanting to be accessible via /dev/acpi should use the
* register/deregister interface to make their handlers visible.
*/
struct acpi_ioctl_hook
{
TAILQ_ENTRY(acpi_ioctl_hook) link;
u_long cmd;
acpi_ioctl_fn fn;
void *arg;
};
static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
static int acpi_ioctl_hooks_initted;
int
acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
{
struct acpi_ioctl_hook *hp;
if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
return (ENOMEM);
hp->cmd = cmd;
hp->fn = fn;
hp->arg = arg;
ACPI_LOCK(acpi);
if (acpi_ioctl_hooks_initted == 0) {
TAILQ_INIT(&acpi_ioctl_hooks);
acpi_ioctl_hooks_initted = 1;
}
TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
ACPI_UNLOCK(acpi);
return (0);
}
void
acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
{
struct acpi_ioctl_hook *hp;
ACPI_LOCK(acpi);
TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
if (hp->cmd == cmd && hp->fn == fn)
break;
if (hp != NULL) {
TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
free(hp, M_ACPIDEV);
}
ACPI_UNLOCK(acpi);
}
static int
acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
{
return (0);
}
static int
acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
return (0);
}
static int
acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
struct acpi_softc *sc;
struct acpi_ioctl_hook *hp;
int error, state;
error = 0;
hp = NULL;
sc = dev->si_drv1;
/*
* Scan the list of registered ioctls, looking for handlers.
*/
ACPI_LOCK(acpi);
if (acpi_ioctl_hooks_initted)
TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
if (hp->cmd == cmd)
break;
}
ACPI_UNLOCK(acpi);
if (hp)
return (hp->fn(cmd, addr, hp->arg));
/*
* Core ioctls are not permitted for non-writable user.
* Currently, other ioctls just fetch information.
* Not changing system behavior.
*/
if ((flag & FWRITE) == 0)
return (EPERM);
/* Core system ioctls. */
switch (cmd) {
case ACPIIO_REQSLPSTATE:
state = *(int *)addr;
if (state != ACPI_STATE_S5)
return (acpi_ReqSleepState(sc, state));
device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
error = EOPNOTSUPP;
break;
case ACPIIO_ACKSLPSTATE:
error = *(int *)addr;
error = acpi_AckSleepState(sc->acpi_clone, error);
break;
case ACPIIO_SETSLPSTATE: /* DEPRECATED */
state = *(int *)addr;
if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
return (EINVAL);
if (!acpi_sleep_states[state])
return (EOPNOTSUPP);
if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
error = ENXIO;
break;
default:
error = ENXIO;
break;
}
return (error);
}
static int
acpi_sname2sstate(const char *sname)
{
int sstate;
if (toupper(sname[0]) == 'S') {
sstate = sname[1] - '0';
if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
sname[2] == '\0')
return (sstate);
} else if (strcasecmp(sname, "NONE") == 0)
return (ACPI_STATE_UNKNOWN);
return (-1);
}
static const char *
acpi_sstate2sname(int sstate)
{
static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
return (snames[sstate]);
else if (sstate == ACPI_STATE_UNKNOWN)
return ("NONE");
return (NULL);
}
static int
acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
{
int error;
struct sbuf sb;
UINT8 state;
sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
if (acpi_sleep_states[state])
sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
sbuf_trim(&sb);
sbuf_finish(&sb);
error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
sbuf_delete(&sb);
return (error);
}
static int
acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
{
char sleep_state[10];
int error, new_state, old_state;
old_state = *(int *)oidp->oid_arg1;
strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
if (error == 0 && req->newptr != NULL) {
new_state = acpi_sname2sstate(sleep_state);
if (new_state < ACPI_STATE_S1)
return (EINVAL);
if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
return (EOPNOTSUPP);
if (new_state != old_state)
*(int *)oidp->oid_arg1 = new_state;
}
return (error);
}
/* Inform devctl(4) when we receive a Notify. */
void
acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
{
char notify_buf[16];
ACPI_BUFFER handle_buf;
ACPI_STATUS status;
if (subsystem == NULL)
return;
handle_buf.Pointer = NULL;
handle_buf.Length = ACPI_ALLOCATE_BUFFER;
status = AcpiNsHandleToPathname(h, &handle_buf);
if (ACPI_FAILURE(status))
return;
snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
AcpiOsFree(handle_buf.Pointer);
}
#ifdef ACPI_DEBUG
/*
* Support for parsing debug options from the kernel environment.
*
* Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
* by specifying the names of the bits in the debug.acpi.layer and
* debug.acpi.level environment variables. Bits may be unset by
* prefixing the bit name with !.
*/
struct debugtag
{
char *name;
UINT32 value;
};
static struct debugtag dbg_layer[] = {
{"ACPI_UTILITIES", ACPI_UTILITIES},
{"ACPI_HARDWARE", ACPI_HARDWARE},
{"ACPI_EVENTS", ACPI_EVENTS},
{"ACPI_TABLES", ACPI_TABLES},
{"ACPI_NAMESPACE", ACPI_NAMESPACE},
{"ACPI_PARSER", ACPI_PARSER},
{"ACPI_DISPATCHER", ACPI_DISPATCHER},
{"ACPI_EXECUTER", ACPI_EXECUTER},
{"ACPI_RESOURCES", ACPI_RESOURCES},
{"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
{"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
{"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
{"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
{"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
{"ACPI_BATTERY", ACPI_BATTERY},
{"ACPI_BUS", ACPI_BUS},
{"ACPI_BUTTON", ACPI_BUTTON},
{"ACPI_EC", ACPI_EC},
{"ACPI_FAN", ACPI_FAN},
{"ACPI_POWERRES", ACPI_POWERRES},
{"ACPI_PROCESSOR", ACPI_PROCESSOR},
{"ACPI_THERMAL", ACPI_THERMAL},
{"ACPI_TIMER", ACPI_TIMER},
{"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
{NULL, 0}
};
static struct debugtag dbg_level[] = {
{"ACPI_LV_INIT", ACPI_LV_INIT},
{"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
{"ACPI_LV_INFO", ACPI_LV_INFO},
{"ACPI_LV_REPAIR", ACPI_LV_REPAIR},
{"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
/* Trace verbosity level 1 [Standard Trace Level] */
{"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
{"ACPI_LV_PARSE", ACPI_LV_PARSE},
{"ACPI_LV_LOAD", ACPI_LV_LOAD},
{"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
{"ACPI_LV_EXEC", ACPI_LV_EXEC},
{"ACPI_LV_NAMES", ACPI_LV_NAMES},
{"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
{"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
{"ACPI_LV_TABLES", ACPI_LV_TABLES},
{"ACPI_LV_VALUES", ACPI_LV_VALUES},
{"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
{"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
{"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
{"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
{"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
/* Trace verbosity level 2 [Function tracing and memory allocation] */
{"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
{"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
{"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
{"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
{"ACPI_LV_ALL", ACPI_LV_ALL},
/* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
{"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
{"ACPI_LV_THREADS", ACPI_LV_THREADS},
{"ACPI_LV_IO", ACPI_LV_IO},
{"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
{"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
/* Exceptionally verbose output -- also used in the global "DebugLevel" */
{"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
{"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
{"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
{"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
{"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
{NULL, 0}
};
static void
acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
{
char *ep;
int i, l;
int set;
while (*cp) {
if (isspace(*cp)) {
cp++;
continue;
}
ep = cp;
while (*ep && !isspace(*ep))
ep++;
if (*cp == '!') {
set = 0;
cp++;
if (cp == ep)
continue;
} else {
set = 1;
}
l = ep - cp;
for (i = 0; tag[i].name != NULL; i++) {
if (!strncmp(cp, tag[i].name, l)) {
if (set)
*flag |= tag[i].value;
else
*flag &= ~tag[i].value;
}
}
cp = ep;
}
}
static void
acpi_set_debugging(void *junk)
{
char *layer, *level;
if (cold) {
AcpiDbgLayer = 0;
AcpiDbgLevel = 0;
}
layer = kern_getenv("debug.acpi.layer");
level = kern_getenv("debug.acpi.level");
if (layer == NULL && level == NULL)
return;
printf("ACPI set debug");
if (layer != NULL) {
if (strcmp("NONE", layer) != 0)
printf(" layer '%s'", layer);
acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
freeenv(layer);
}
if (level != NULL) {
if (strcmp("NONE", level) != 0)
printf(" level '%s'", level);
acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
freeenv(level);
}
printf("\n");
}
SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
NULL);
static int
acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
{
int error, *dbg;
struct debugtag *tag;
struct sbuf sb;
char temp[128];
if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
return (ENOMEM);
if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
tag = &dbg_layer[0];
dbg = &AcpiDbgLayer;
} else {
tag = &dbg_level[0];
dbg = &AcpiDbgLevel;
}
/* Get old values if this is a get request. */
ACPI_SERIAL_BEGIN(acpi);
if (*dbg == 0) {
sbuf_cpy(&sb, "NONE");
} else if (req->newptr == NULL) {
for (; tag->name != NULL; tag++) {
if ((*dbg & tag->value) == tag->value)
sbuf_printf(&sb, "%s ", tag->name);
}
}
sbuf_trim(&sb);
sbuf_finish(&sb);
strlcpy(temp, sbuf_data(&sb), sizeof(temp));
sbuf_delete(&sb);
error = sysctl_handle_string(oidp, temp, sizeof(temp), req);
/* Check for error or no change */
if (error == 0 && req->newptr != NULL) {
*dbg = 0;
kern_setenv((char *)oidp->oid_arg1, temp);
acpi_set_debugging(NULL);
}
ACPI_SERIAL_END(acpi);
return (error);
}
SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
"debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
"debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
#endif /* ACPI_DEBUG */
static int
acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
{
int error;
int old;
old = acpi_debug_objects;
error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
if (error != 0 || req->newptr == NULL)
return (error);
if (old == acpi_debug_objects || (old && acpi_debug_objects))
return (0);
ACPI_SERIAL_BEGIN(acpi);
AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
ACPI_SERIAL_END(acpi);
return (0);
}
static int
acpi_parse_interfaces(char *str, struct acpi_interface *iface)
{
char *p;
size_t len;
int i, j;
p = str;
while (isspace(*p) || *p == ',')
p++;
len = strlen(p);
if (len == 0)
return (0);
p = strdup(p, M_TEMP);
for (i = 0; i < len; i++)
if (p[i] == ',')
p[i] = '\0';
i = j = 0;
while (i < len)
if (isspace(p[i]) || p[i] == '\0')
i++;
else {
i += strlen(p + i) + 1;
j++;
}
if (j == 0) {
free(p, M_TEMP);
return (0);
}
iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
iface->num = j;
i = j = 0;
while (i < len)
if (isspace(p[i]) || p[i] == '\0')
i++;
else {
iface->data[j] = p + i;
i += strlen(p + i) + 1;
j++;
}
return (j);
}
static void
acpi_free_interfaces(struct acpi_interface *iface)
{
free(iface->data[0], M_TEMP);
free(iface->data, M_TEMP);
}
static void
acpi_reset_interfaces(device_t dev)
{
struct acpi_interface list;
ACPI_STATUS status;
int i;
if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
for (i = 0; i < list.num; i++) {
status = AcpiInstallInterface(list.data[i]);
if (ACPI_FAILURE(status))
device_printf(dev,
"failed to install _OSI(\"%s\"): %s\n",
list.data[i], AcpiFormatException(status));
else if (bootverbose)
device_printf(dev, "installed _OSI(\"%s\")\n",
list.data[i]);
}
acpi_free_interfaces(&list);
}
if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
for (i = 0; i < list.num; i++) {
status = AcpiRemoveInterface(list.data[i]);
if (ACPI_FAILURE(status))
device_printf(dev,
"failed to remove _OSI(\"%s\"): %s\n",
list.data[i], AcpiFormatException(status));
else if (bootverbose)
device_printf(dev, "removed _OSI(\"%s\")\n",
list.data[i]);
}
acpi_free_interfaces(&list);
}
}
static int
acpi_pm_func(u_long cmd, void *arg, ...)
{
int state, acpi_state;
int error;
struct acpi_softc *sc;
va_list ap;
error = 0;
switch (cmd) {
case POWER_CMD_SUSPEND:
sc = (struct acpi_softc *)arg;
if (sc == NULL) {
error = EINVAL;
goto out;
}
va_start(ap, arg);
state = va_arg(ap, int);
va_end(ap);
switch (state) {
case POWER_SLEEP_STATE_STANDBY:
acpi_state = sc->acpi_standby_sx;
break;
case POWER_SLEEP_STATE_SUSPEND:
acpi_state = sc->acpi_suspend_sx;
break;
case POWER_SLEEP_STATE_HIBERNATE:
acpi_state = ACPI_STATE_S4;
break;
default:
error = EINVAL;
goto out;
}
if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
error = ENXIO;
break;
default:
error = EINVAL;
goto out;
}
out:
return (error);
}
static void
acpi_pm_register(void *arg)
{
if (!cold || resource_disabled("acpi", 0))
return;
power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
}
SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
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