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0e4148688c
freebsd/sys/dev/acpica/acpi.c
Nate Lawson 0e4148688c Don't forget to pass shutdown events down to children first now that we 
handle them at the bus level too.
2004-06-05 09:56:04 +00:00

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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.
*
* $FreeBSD$
*/
#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/smp.h>
#include <machine/clock.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <isa/isavar.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
#include <contrib/dev/acpica/acnamesp.h>
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_flags = D_NEEDGIANT,
.d_open = acpiopen,
.d_close = acpiclose,
.d_ioctl = acpiioctl,
.d_name = "acpi",
};
#if __FreeBSD_version >= 500000
struct mtx acpi_mutex;
#endif
struct acpi_quirks {
char *OemId;
uint32_t OemRevision;
char *value;
};
#define ACPI_OEM_REV_ANY 0
static struct acpi_quirks acpi_quirks_table[] = {
#ifdef notyet
/* Bad PCI routing table. Used on some SuperMicro boards. */
{ "PTLTD ", 0x06040000, "pci_link" },
#endif
{ NULL, 0, NULL }
};
static int acpi_modevent(struct module *mod, int event, void *junk);
static void acpi_identify(driver_t *driver, device_t parent);
static int acpi_probe(device_t dev);
static int acpi_attach(device_t dev);
static int acpi_shutdown(device_t dev);
static void acpi_quirks_set(void);
static device_t acpi_add_child(device_t bus, int order, const char *name,
int unit);
static int acpi_print_child(device_t bus, device_t child);
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 int acpi_set_resource(device_t dev, device_t child, int type,
int rid, u_long start, u_long count);
static int acpi_get_resource(device_t dev, device_t child, int type,
int rid, u_long *startp, u_long *countp);
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_release_resource(device_t bus, device_t child, int type,
int rid, struct resource *r);
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 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 ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
void *context, void **status);
static void acpi_shutdown_pre_sync(void *arg, int howto);
static void acpi_shutdown_final(void *arg, int howto);
static void acpi_shutdown_poweroff(void *arg);
static void acpi_enable_fixed_events(struct acpi_softc *sc);
static int acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw);
static ACPI_STATUS acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context,
void **status);
static int acpi_wake_limit_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_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
static int acpi_sleep_state_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);
static device_method_t acpi_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, acpi_identify),
DEVMETHOD(device_probe, acpi_probe),
DEVMETHOD(device_attach, acpi_attach),
DEVMETHOD(device_shutdown, acpi_shutdown),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_add_child, acpi_add_child),
DEVMETHOD(bus_print_child, acpi_print_child),
DEVMETHOD(bus_read_ivar, acpi_read_ivar),
DEVMETHOD(bus_write_ivar, acpi_write_ivar),
DEVMETHOD(bus_set_resource, acpi_set_resource),
DEVMETHOD(bus_get_resource, acpi_get_resource),
DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
DEVMETHOD(bus_release_resource, acpi_release_resource),
DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
DEVMETHOD(bus_driver_added, bus_generic_driver_added),
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),
/* ISA emulation */
DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
{0, 0}
};
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);
static const char* sleep_state_names[] = {
"S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, 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 override of whether methods execute in parallel or not.
* Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
* errors for AML that really can't handle parallel method execution.
* It is off by default since this breaks recursive methods and
* some IBMs use such code.
*/
static int acpi_serialize_methods;
TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
/*
* 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 heirarchy 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)
{
#ifdef ACPI_DEBUGGER
char *debugpoint;
#endif
static int error, started = 0;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (started)
return_VALUE (error);
started = 1;
#if __FreeBSD_version >= 500000
/* Initialise the ACPI mutex */
mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
#endif
/*
* Set the globals from our tunables. This is needed because ACPI-CA
* uses UINT8 for some values and we have no tunable_byte.
*/
AcpiGbl_AllMethodsSerialized = (UINT8)acpi_serialize_methods;
/* Start up the ACPI CA subsystem. */
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (!strcmp(debugpoint, "init"))
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
return_VALUE (error);
}
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (!strcmp(debugpoint, "tables"))
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
if (ACPI_FAILURE(error = AcpiLoadTables())) {
printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
return_VALUE(error);
}
/* Set up any quirks we have for this XSDT. */
acpi_quirks_set();
if (acpi_disabled("acpi"))
return_VALUE (AE_ERROR);
return_VALUE (AE_OK);
}
/*
* Detect ACPI, perform early initialisation
*/
static void
acpi_identify(driver_t *driver, device_t parent)
{
device_t child;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (!cold)
return_VOID;
/* Check that we haven't been disabled with a hint. */
if (resource_disabled("acpi", 0))
return_VOID;
/* Make sure we're not being doubly invoked. */
if (device_find_child(parent, "acpi", 0) != NULL)
return_VOID;
/* Initialize ACPI-CA. */
if (ACPI_FAILURE(acpi_Startup()))
return_VOID;
snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION);
/* Attach the actual ACPI device. */
if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
device_printf(parent, "ACPI: could not attach\n");
return_VOID;
}
}
/*
* Fetch some descriptive data from ACPI to put in our attach message
*/
static int
acpi_probe(device_t dev)
{
ACPI_TABLE_HEADER th;
char buf[20];
int error;
struct sbuf sb;
ACPI_STATUS status;
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
power_pm_get_type() != POWER_PM_TYPE_ACPI) {
device_printf(dev, "Other PM system enabled.\n");
return_VALUE(ENXIO);
}
ACPI_LOCK;
if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
device_printf(dev, "couldn't get XSDT header: %s\n",
AcpiFormatException(status));
error = ENXIO;
} else {
sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
sbuf_bcat(&sb, th.OemId, 6);
sbuf_trim(&sb);
sbuf_putc(&sb, ' ');
sbuf_bcat(&sb, th.OemTableId, 8);
sbuf_trim(&sb);
sbuf_finish(&sb);
device_set_desc_copy(dev, sbuf_data(&sb));
sbuf_delete(&sb);
error = 0;
}
ACPI_UNLOCK;
return_VALUE(error);
}
static int
acpi_attach(device_t dev)
{
struct acpi_softc *sc;
ACPI_STATUS status;
int error, state;
UINT32 flags;
UINT8 TypeA, TypeB;
char *env;
#ifdef ACPI_DEBUGGER
char *debugpoint;
#endif
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
ACPI_LOCK;
sc = device_get_softc(dev);
bzero(sc, sizeof(*sc));
sc->acpi_dev = dev;
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (!strcmp(debugpoint, "spaces"))
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
/* Install the default address space handlers. */
error = ENXIO;
status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(status)) {
device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
AcpiFormatException(status));
goto out;
}
status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(status)) {
device_printf(dev, "Could not initialise SystemIO handler: %s\n",
AcpiFormatException(status));
goto out;
}
status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE(status)) {
device_printf(dev, "could not initialise PciConfig handler: %s\n",
AcpiFormatException(status));
goto out;
}
/*
* Bring ACPI fully online.
*
* 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.
*/
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (!strcmp(debugpoint, "enable"))
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
flags = 0;
if (testenv("debug.acpi.avoid"))
flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
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.
*/
acpi_ec_ecdt_probe(dev);
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_RD | CTLFLAG_RW,
&sc->acpi_sleep_delay, 0, "sleep delay");
SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
OID_AUTO, "s4bios", CTLFLAG_RD | 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_RD | 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_poweroff", CTLFLAG_RD | CTLFLAG_RW,
&sc->acpi_disable_on_poweroff, 0, "ACPI subsystem disable on poweroff");
/*
* Default to 1 second before sleeping to give some machines time to
* stabilize.
*/
sc->acpi_sleep_delay = 1;
sc->acpi_disable_on_poweroff = 0;
if (bootverbose)
sc->acpi_verbose = 1;
if ((env = getenv("hw.acpi.verbose")) && strcmp(env, "0")) {
sc->acpi_verbose = 1;
freeenv(env);
}
/* Only enable S4BIOS by default if the FACS says it is available. */
if (AcpiGbl_FACS->S4Bios_f != 0)
sc->acpi_s4bios = 1;
/*
* Dispatch the default sleep state to devices. The lid switch is set
* to NONE by default to avoid surprising users.
*/
sc->acpi_power_button_sx = ACPI_STATE_S5;
sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
sc->acpi_standby_sx = ACPI_STATE_S1;
sc->acpi_suspend_sx = ACPI_STATE_S3;
/* Pick the first valid sleep state for the sleep button default. */
sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
sc->acpi_sleep_button_sx = state;
break;
}
acpi_enable_fixed_events(sc);
/*
* Scan the namespace and attach/initialise children.
*/
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (!strcmp(debugpoint, "probe"))
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
/* Register our shutdown handlers */
EVENTHANDLER_REGISTER(shutdown_pre_sync, acpi_shutdown_pre_sync, sc,
SHUTDOWN_PRI_LAST);
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 = 1;
sc->acpi_sstate = ACPI_STATE_S0;
sc->acpi_sleep_disabled = 0;
/* 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;
#ifdef ACPI_DEBUGGER
debugpoint = getenv("debug.acpi.debugger");
if (debugpoint) {
if (strcmp(debugpoint, "running") == 0)
acpi_EnterDebugger();
freeenv(debugpoint);
}
#endif
#ifdef ACPI_USE_THREADS
if ((error = acpi_task_thread_init()))
goto out;
#endif
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);
error = 0;
out:
ACPI_UNLOCK;
return_VALUE (error);
}
static int
acpi_shutdown(device_t dev)
{
/* Allow children to shutdown first. */
bus_generic_shutdown(dev);
/* Disable all wake GPEs not appropriate for reboot/poweroff. */
acpi_wake_limit_walk(ACPI_STATE_S5);
return (0);
}
static void
acpi_quirks_set()
{
XSDT_DESCRIPTOR *xsdt;
struct acpi_quirks *quirk;
char *env, *tmp;
int len;
/*
* If the user loaded a custom table or disabled "quirks", leave
* the settings alone.
*/
len = 0;
if ((env = getenv("acpi_dsdt_load")) != NULL) {
/* XXX No strcasecmp but this is good enough. */
if (*env == 'Y' || *env == 'y')
goto out;
freeenv(env);
}
if ((env = getenv("debug.acpi.disabled")) != NULL) {
if (strstr("quirks", env) != NULL)
goto out;
len = strlen(env);
}
/*
* Search through our quirk table and concatenate the disabled
* values with whatever we find.
*/
xsdt = AcpiGbl_XSDT;
for (quirk = acpi_quirks_table; quirk->OemId; quirk++) {
if (!strncmp(xsdt->OemId, quirk->OemId, strlen(quirk->OemId)) &&
(xsdt->OemRevision == quirk->OemRevision ||
quirk->OemRevision == ACPI_OEM_REV_ANY)) {
len += strlen(quirk->value) + 2;
if ((tmp = malloc(len, M_TEMP, M_NOWAIT)) == NULL)
goto out;
sprintf(tmp, "%s %s", env ? env : "", quirk->value);
setenv("debug.acpi.disabled", tmp);
free(tmp, M_TEMP);
break;
}
}
out:
if (env)
freeenv(env);
}
/*
* Handle a new device being added
*/
static device_t
acpi_add_child(device_t bus, 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);
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");
retval += bus_print_child_footer(bus, child);
return (retval);
}
/* 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);
if (dinfo->ad_handle)
snprintf(buf, buflen, "path=%s", acpi_name(dinfo->ad_handle));
else
snprintf(buf, buflen, "magic=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)
{
ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
ACPI_DEVICE_INFO *adinfo;
struct acpi_device *dinfo = device_get_ivars(child);
char *end;
int error;
error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
if (error)
snprintf(buf, buflen, "Unknown");
else
snprintf(buf, buflen, "_HID=%s _UID=%lu",
(adinfo->Valid & ACPI_VALID_HID) ?
adinfo->HardwareId.Value : "UNKNOWN",
(adinfo->Valid & ACPI_VALID_UID) ?
strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
if (adinfo)
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) {
printf("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_MAGIC:
*(int *)result = ad->ad_magic;
break;
case ACPI_IVAR_PRIVATE:
*(void **)result = ad->ad_private;
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) {
printf("device has no ivars\n");
return (ENOENT);
}
switch(index) {
case ACPI_IVAR_HANDLE:
ad->ad_handle = (ACPI_HANDLE)value;
break;
case ACPI_IVAR_MAGIC:
ad->ad_magic = (int)value;
break;
case ACPI_IVAR_PRIVATE:
ad->ad_private = (void *)value;
break;
default:
panic("bad ivar write request (%d)", index);
return (ENOENT);
}
return (0);
}
/*
* Handle child resource allocation/removal
*/
static int
acpi_set_resource(device_t dev, device_t child, int type, int rid,
u_long start, u_long count)
{
struct acpi_device *ad = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
resource_list_add(rl, type, rid, start, start + count -1, count);
return(0);
}
static int
acpi_get_resource(device_t dev, device_t child, int type, int rid,
u_long *startp, u_long *countp)
{
struct acpi_device *ad = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
struct resource_list_entry *rle;
rle = resource_list_find(rl, type, rid);
if (!rle)
return(ENOENT);
if (startp)
*startp = rle->start;
if (countp)
*countp = rle->count;
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)
{
struct acpi_device *ad = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
return (resource_list_alloc(rl, bus, child, type, rid, start, end, count,
flags));
}
static int
acpi_release_resource(device_t bus, device_t child, int type, int rid, struct resource *r)
{
struct acpi_device *ad = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
return (resource_list_release(rl, bus, child, type, rid, r));
}
/* Allocate an IO port or memory resource, given its GAS. */
struct resource *
acpi_bus_alloc_gas(device_t dev, int *rid, ACPI_GENERIC_ADDRESS *gas)
{
int type;
if (gas == NULL || !ACPI_VALID_ADDRESS(gas->Address) ||
gas->RegisterBitWidth < 8)
return (NULL);
switch (gas->AddressSpaceId) {
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
type = SYS_RES_MEMORY;
break;
case ACPI_ADR_SPACE_SYSTEM_IO:
type = SYS_RES_IOPORT;
break;
default:
return (NULL);
}
bus_set_resource(dev, type, *rid, gas->Address, gas->RegisterBitWidth / 8);
return (bus_alloc_resource_any(dev, type, rid, RF_ACTIVE));
}
/*
* Handle ISA-like devices probing for a PnP ID to match.
*/
#define PNP_EISAID(s) \
((((s[0] - '@') & 0x1f) << 2) \
| (((s[1] - '@') & 0x18) >> 3) \
| (((s[1] - '@') & 0x07) << 13) \
| (((s[2] - '@') & 0x1f) << 8) \
| (PNP_HEXTONUM(s[4]) << 16) \
| (PNP_HEXTONUM(s[3]) << 20) \
| (PNP_HEXTONUM(s[6]) << 24) \
| (PNP_HEXTONUM(s[5]) << 28))
static uint32_t
acpi_isa_get_logicalid(device_t dev)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_BUFFER buf;
ACPI_HANDLE h;
ACPI_STATUS error;
u_int32_t pnpid;
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
pnpid = 0;
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
ACPI_LOCK;
/* Fetch and validate the HID. */
if ((h = acpi_get_handle(dev)) == NULL)
goto out;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
goto out;
devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
if ((devinfo->Valid & ACPI_VALID_HID) != 0)
pnpid = PNP_EISAID(devinfo->HardwareId.Value);
out:
if (buf.Pointer != NULL)
AcpiOsFree(buf.Pointer);
ACPI_UNLOCK;
return_VALUE (pnpid);
}
static int
acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_BUFFER buf;
ACPI_HANDLE h;
ACPI_STATUS error;
uint32_t *pnpid;
int valid, i;
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
pnpid = cids;
valid = 0;
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
ACPI_LOCK;
/* Fetch and validate the CID */
if ((h = acpi_get_handle(dev)) == NULL)
goto out;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
goto out;
devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
if ((devinfo->Valid & ACPI_VALID_CID) == 0)
goto out;
if (devinfo->CompatibilityId.Count < count)
count = devinfo->CompatibilityId.Count;
for (i = 0; i < count; i++) {
if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
continue;
*pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
valid++;
}
out:
if (buf.Pointer != NULL)
AcpiOsFree(buf.Pointer);
ACPI_UNLOCK;
return_VALUE (valid);
}
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:
return_VALUE (result);
}
/*
* Scan relevant portions of the ACPI namespace and attach child devices.
*
* Note that we only expect to find devices in the \_PR_, \_TZ_, \_SI_ and
* \_SB_ scopes, and \_PR_ and \_TZ_ become obsolete in the ACPI 2.0 spec.
*/
static void
acpi_probe_children(device_t bus)
{
ACPI_HANDLE parent;
ACPI_STATUS status;
static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
int i;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
ACPI_ASSERTLOCK;
/* Create any static children by calling device identify methods. */
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
bus_generic_probe(bus);
/*
* Scan the namespace and insert placeholders for all the devices that
* we find.
*
* 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"));
for (i = 0; scopes[i] != NULL; i++) {
status = AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent);
if (ACPI_SUCCESS(status)) {
AcpiWalkNamespace(ACPI_TYPE_ANY, parent, 100, acpi_probe_child,
bus, NULL);
}
}
/*
* Scan all of the child devices we have created and let them probe/attach.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
bus_generic_attach(bus);
/*
* Some of these children may have attached others as part of their attach
* process (eg. the root PCI bus driver), so rescan.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second 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;
}
/*
* 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)
{
ACPI_OBJECT_TYPE type;
device_t child, bus = (device_t)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
/* Skip this device if we think we'll have trouble with it. */
if (acpi_avoid(handle))
return_ACPI_STATUS (AE_OK);
if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
switch(type) {
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_POWER:
if (acpi_disabled("children"))
break;
/*
* Create a placeholder device for this node. Sort the placeholder
* so that the probe/attach passes will run breadth-first.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n",
acpi_name(handle)));
child = BUS_ADD_CHILD(bus, level * 10, NULL, -1);
if (child == NULL)
break;
acpi_set_handle(child, handle);
/* Check if the device can generate wake events. */
if (ACPI_SUCCESS(AcpiEvaluateObject(handle, "_PRW", NULL, NULL)))
device_set_flags(child, ACPI_FLAG_WAKE_CAPABLE);
/*
* 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).
*/
if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
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);
/* If we're debugging, probe/attach now rather than later */
ACPI_DEBUG_EXEC(device_probe_and_attach(child));
break;
}
}
return_ACPI_STATUS (AE_OK);
}
static void
acpi_shutdown_pre_sync(void *arg, int howto)
{
struct acpi_softc *sc = arg;
ACPI_ASSERTLOCK;
/*
* Disable all ACPI events before soft off, otherwise the system
* will be turned on again on some laptops.
*
* XXX this should probably be restricted to masking some events just
* before powering down, since we may still need ACPI during the
* shutdown process.
*/
if (sc->acpi_disable_on_poweroff)
acpi_Disable(sc);
}
static void
acpi_shutdown_final(void *arg, int howto)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
/*
* If powering off, run the actual shutdown code on each processor.
* It will only perform the shutdown on the BSP. 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)) {
printf("AcpiEnterSleepStatePrep failed - %s\n",
AcpiFormatException(status));
return;
}
printf("Powering system off using ACPI\n");
smp_rendezvous(NULL, acpi_shutdown_poweroff, NULL, NULL);
} else {
printf("Shutting down ACPI\n");
AcpiTerminate();
}
}
/*
* Since this function may be called with locks held or in an unknown
* context, it cannot allocate memory, acquire locks, sleep, etc.
*/
static void
acpi_shutdown_poweroff(void *arg)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
/* Only attempt to power off if this is the BSP (cpuid 0). */
if (PCPU_GET(cpuid) != 0)
return;
ACPI_DISABLE_IRQS();
status = AcpiEnterSleepState(ACPI_STATE_S5);
if (ACPI_FAILURE(status)) {
printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
} else {
DELAY(1000000);
printf("ACPI power-off failed - timeout\n");
}
}
static void
acpi_enable_fixed_events(struct acpi_softc *sc)
{
static int first_time = 1;
ACPI_ASSERTLOCK;
/* Enable and clear fixed events and install handlers. */
if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 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 != NULL && AcpiGbl_FADT->SleepButton == 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;
ACPI_BUFFER buf;
ACPI_STATUS error;
int ret;
ACPI_ASSERTLOCK;
ret = FALSE;
if ((h = acpi_get_handle(dev)) == NULL)
return (FALSE);
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
return (FALSE);
devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
/* If no _STA method, must be present */
if ((devinfo->Valid & ACPI_VALID_STA) == 0)
ret = TRUE;
/* Return true for 'present' and 'functioning' */
if ((devinfo->CurrentStatus & 0x9) == 0x9)
ret = TRUE;
AcpiOsFree(buf.Pointer);
return (ret);
}
/*
* Returns true if the battery is actually present and inserted.
*/
BOOLEAN
acpi_BatteryIsPresent(device_t dev)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
ACPI_BUFFER buf;
ACPI_STATUS error;
int ret;
ACPI_ASSERTLOCK;
ret = FALSE;
if ((h = acpi_get_handle(dev)) == NULL)
return (FALSE);
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
return (FALSE);
devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
/* If no _STA method, must be present */
if ((devinfo->Valid & ACPI_VALID_STA) == 0)
ret = TRUE;
/* Return true for 'present' and 'functioning' */
if ((devinfo->CurrentStatus & 0x19) == 0x19)
ret = TRUE;
AcpiOsFree(buf.Pointer);
return (ret);
}
/*
* Match a HID string against a device
*/
BOOLEAN
acpi_MatchHid(device_t dev, char *hid)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_HANDLE h;
ACPI_BUFFER buf;
ACPI_STATUS error;
int ret, i;
ACPI_ASSERTLOCK;
ret = FALSE;
if (hid == NULL)
return (FALSE);
if ((h = acpi_get_handle(dev)) == NULL)
return (FALSE);
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
return (FALSE);
devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
strcmp(hid, devinfo->HardwareId.Value) == 0)
ret = TRUE;
else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
ret = TRUE;
break;
}
}
}
AcpiOsFree(buf.Pointer);
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;
ACPI_ASSERTLOCK;
/* Walk back up the tree to the root */
for (;;) {
status = AcpiGetHandle(parent, path, &r);
if (ACPI_SUCCESS(status)) {
*result = r;
return (AE_OK);
}
if (status != AE_NOT_FOUND)
return (AE_OK);
if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
return (AE_NOT_FOUND);
parent = r;
}
}
/* Find the difference between two PM tick counts. */
uint32_t
acpi_TimerDelta(uint32_t end, uint32_t start)
{
uint32_t delta;
if (end >= start)
delta = end - start;
else if (AcpiGbl_FADT->TmrValExt == 0)
delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
else
delta = ((0xFFFFFFFF - start) + end + 1);
return (delta);
}
/*
* 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;
ACPI_ASSERTLOCK;
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;
ACPI_ASSERTLOCK;
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->Id == ACPI_RSTYPE_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->Id = ACPI_RSTYPE_END_TAG;
rp->Length = 0;
}
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->Id == ACPI_RSTYPE_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_RESOURCE_LENGTH_NO_DATA +
ACPI_RESOURCE_LENGTH) >= 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_RESOURCE_LENGTH_NO_DATA);
/* And add the terminator. */
rp = ACPI_NEXT_RESOURCE(rp);
rp->Id = ACPI_RSTYPE_END_TAG;
rp->Length = 0;
return (AE_OK);
}
/*
* Set interrupt model.
*/
ACPI_STATUS
acpi_SetIntrModel(int model)
{
return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
}
#define ACPI_MINIMUM_AWAKETIME 5
static void
acpi_sleep_enable(void *arg)
{
((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
}
/*
* Set the system sleep state
*
* Currently we support S1-S5 but S4 is only S4BIOS
*/
ACPI_STATUS
acpi_SetSleepState(struct acpi_softc *sc, int state)
{
ACPI_STATUS status = AE_OK;
UINT8 TypeA;
UINT8 TypeB;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
ACPI_ASSERTLOCK;
/* Avoid reentry if already attempting to suspend. */
if (sc->acpi_sstate != ACPI_STATE_S0)
return_ACPI_STATUS (AE_BAD_PARAMETER);
/* We recently woke up so don't suspend again for a while. */
if (sc->acpi_sleep_disabled)
return_ACPI_STATUS (AE_OK);
switch (state) {
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
case ACPI_STATE_S4:
status = AcpiGetSleepTypeData((UINT8)state, &TypeA, &TypeB);
if (status == AE_NOT_FOUND) {
device_printf(sc->acpi_dev,
"Sleep state S%d not supported by BIOS\n", state);
break;
} else if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
AcpiFormatException(status));
break;
}
sc->acpi_sstate = state;
sc->acpi_sleep_disabled = 1;
/* Disable all wake GPEs not appropriate for this state. */
acpi_wake_limit_walk(state);
/* Inform all devices that we are going to sleep. */
if (DEVICE_SUSPEND(root_bus) != 0) {
/*
* Re-wake the system.
*
* 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.
*/
DEVICE_RESUME(root_bus);
return_ACPI_STATUS (AE_ERROR);
}
status = AcpiEnterSleepStatePrep(state);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
AcpiFormatException(status));
break;
}
if (sc->acpi_sleep_delay > 0)
DELAY(sc->acpi_sleep_delay * 1000000);
if (state != ACPI_STATE_S1) {
acpi_sleep_machdep(sc, state);
/* AcpiEnterSleepState() may be incomplete, unlock if locked. */
if (AcpiGbl_MutexInfo[ACPI_MTX_HARDWARE].OwnerId !=
ACPI_MUTEX_NOT_ACQUIRED) {
AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
}
/* Re-enable ACPI hardware on wakeup from sleep state 4. */
if (state == ACPI_STATE_S4)
AcpiEnable();
} else {
status = AcpiEnterSleepState((UINT8)state);
if (ACPI_FAILURE(status)) {
device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
AcpiFormatException(status));
break;
}
}
AcpiLeaveSleepState((UINT8)state);
DEVICE_RESUME(root_bus);
sc->acpi_sstate = ACPI_STATE_S0;
acpi_enable_fixed_events(sc);
break;
case ACPI_STATE_S5:
/*
* Shut down cleanly and power off. This will call us back through the
* shutdown handlers.
*/
shutdown_nice(RB_POWEROFF);
break;
case ACPI_STATE_S0:
default:
status = AE_BAD_PARAMETER;
break;
}
/* Disable a second sleep request for a short period */
if (sc->acpi_sleep_disabled)
timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
return_ACPI_STATUS (status);
}
/* Initialize a device's wake GPE. */
int
acpi_wake_init(device_t dev, int type)
{
struct acpi_prw_data prw;
/* Check that the device can wake the system. */
if ((device_get_flags(dev) & ACPI_FLAG_WAKE_CAPABLE) == 0)
return (ENXIO);
/* Evaluate _PRW to find the GPE. */
if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
return (ENXIO);
/* Set the requested type for the GPE (runtime, wake, or both). */
if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
device_printf(dev, "set GPE type failed\n");
return (ENXIO);
}
return (0);
}
/* Enable or disable the device's wake GPE. */
int
acpi_wake_set_enable(device_t dev, int enable)
{
struct acpi_prw_data prw;
ACPI_HANDLE handle;
ACPI_STATUS status;
int flags;
/* Make sure the device supports waking the system. */
flags = device_get_flags(dev);
handle = acpi_get_handle(dev);
if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
return (ENXIO);
/* Evaluate _PRW to find the GPE. */
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
if (enable) {
status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
if (ACPI_FAILURE(status)) {
device_printf(dev, "enable wake failed\n");
return (ENXIO);
}
device_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
} else {
status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
if (ACPI_FAILURE(status)) {
device_printf(dev, "disable wake failed\n");
return (ENXIO);
}
device_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
}
return (0);
}
/* Configure a device's GPE appropriately for the new sleep state. */
int
acpi_wake_sleep_prep(device_t dev, int sstate)
{
struct acpi_prw_data prw;
ACPI_HANDLE handle;
int flags;
/* Check that this is an ACPI device and get its GPE. */
flags = device_get_flags(dev);
handle = acpi_get_handle(dev);
if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
return (ENXIO);
/* Evaluate _PRW to find the GPE. */
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
/*
* TBD: All Power Resources referenced by elements 2 through N
* of the _PRW object are put into the ON state.
*/
/*
* If the user requested that this device wake the system and the next
* sleep state is valid for this GPE, enable it and the device's wake
* capability. The sleep state must be less than (i.e., higher power)
* or equal to the value specified by _PRW. Return early, leaving
* the appropriate power resources enabled.
*/
if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0 &&
sstate <= prw.lowest_wake) {
if (bootverbose)
device_printf(dev, "wake_prep enabled gpe %#x for state %d\n",
prw.gpe_bit, sstate);
AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
acpi_SetInteger(handle, "_PSW", 1);
return (0);
}
/*
* If the device wake was disabled or this sleep state is too low for
* this device, disable its wake capability and GPE.
*/
AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
acpi_SetInteger(handle, "_PSW", 0);
if (bootverbose)
device_printf(dev, "wake_prep disabled gpe %#x for state %d\n",
prw.gpe_bit, sstate);
/*
* TBD: All Power Resources referenced by elements 2 through N
* of the _PRW object are put into the OFF state.
*/
return (0);
}
/* Re-enable GPEs after wake. */
int
acpi_wake_run_prep(device_t dev)
{
struct acpi_prw_data prw;
ACPI_HANDLE handle;
int flags;
/* Check that this is an ACPI device and get its GPE. */
flags = device_get_flags(dev);
handle = acpi_get_handle(dev);
if ((flags & ACPI_FLAG_WAKE_CAPABLE) == 0 || handle == NULL)
return (ENXIO);
/* Evaluate _PRW to find the GPE. */
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
/*
* TBD: Be sure all Power Resources referenced by elements 2 through N
* of the _PRW object are in the ON state.
*/
/* Disable wake capability and if the user requested, enable the GPE. */
acpi_SetInteger(handle, "_PSW", 0);
if ((flags & ACPI_FLAG_WAKE_ENABLED) != 0)
AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
return (0);
}
static ACPI_STATUS
acpi_wake_limit(ACPI_HANDLE h, UINT32 level, void *context, void **status)
{
struct acpi_prw_data prw;
int *sstate;
/* It's ok not to have _PRW if the device can't wake the system. */
if (acpi_parse_prw(h, &prw) != 0)
return (AE_OK);
sstate = (int *)context;
if (*sstate > prw.lowest_wake)
AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
return (AE_OK);
}
/* Walk all system devices, disabling them if necessary for sstate. */
static int
acpi_wake_limit_walk(int sstate)
{
ACPI_HANDLE sb_handle;
if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
AcpiWalkNamespace(ACPI_TYPE_ANY, sb_handle, 100,
acpi_wake_limit, &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;
error = device_get_children(dev, &devlist, &numdevs);
if (error != 0 || numdevs == 0)
return (error);
for (i = 0; i < numdevs; i++) {
child = devlist[i];
if (!device_is_attached(child))
continue;
if (device_get_flags(child) & ACPI_FLAG_WAKE_CAPABLE) {
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");
}
acpi_wake_sysctl_walk(child);
}
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 = (device_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. */
static 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;
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;
}
/* XXX No power resource handling yet. */
prw->power_res = NULL;
out:
if (prw_buffer.Pointer != NULL)
AcpiOsFree(prw_buffer.Pointer);
return (error);
}
/*
* Enable/Disable ACPI
*/
ACPI_STATUS
acpi_Enable(struct acpi_softc *sc)
{
ACPI_STATUS status;
u_int32_t flags;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
ACPI_ASSERTLOCK;
flags = ACPI_NO_ADDRESS_SPACE_INIT | ACPI_NO_HARDWARE_INIT |
ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
if (!sc->acpi_enabled)
status = AcpiEnableSubsystem(flags);
else
status = AE_OK;
if (status == AE_OK)
sc->acpi_enabled = 1;
return_ACPI_STATUS (status);
}
ACPI_STATUS
acpi_Disable(struct acpi_softc *sc)
{
ACPI_STATUS status;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
ACPI_ASSERTLOCK;
if (sc->acpi_enabled)
status = AcpiDisable();
else
status = AE_OK;
if (status == AE_OK)
sc->acpi_enabled = 0;
return_ACPI_STATUS (status);
}
/*
* ACPI Event Handlers
*/
/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
static void
acpi_system_eventhandler_sleep(void *arg, int state)
{
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
ACPI_LOCK;
if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
acpi_SetSleepState((struct acpi_softc *)arg, state);
ACPI_UNLOCK;
return_VOID;
}
static void
acpi_system_eventhandler_wakeup(void *arg, int state)
{
ACPI_LOCK_DECL;
ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
/* Well, what to do? :-) */
ACPI_LOCK;
ACPI_UNLOCK;
return_VOID;
}
/*
* ACPICA Event Handlers (FixedEvent, also called from button notify handler)
*/
UINT32
acpi_event_power_button_sleep(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
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__);
EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
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__);
EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
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__);
EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
return_VALUE (ACPI_INTERRUPT_HANDLED);
}
/*
* XXX This is kinda ugly, and should not be here.
*/
struct acpi_staticbuf {
ACPI_BUFFER buffer;
char data[512];
};
char *
acpi_name(ACPI_HANDLE handle)
{
static struct acpi_staticbuf buf;
ACPI_ASSERTLOCK;
buf.buffer.Length = 512;
buf.buffer.Pointer = &buf.data[0];
if (ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer)))
return (buf.buffer.Pointer);
return ("(unknown path)");
}
/*
* 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 = 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 = 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;
/*
* Register an ioctl handler.
*/
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;
if (acpi_ioctl_hooks_initted == 0) {
TAILQ_INIT(&acpi_ioctl_hooks);
acpi_ioctl_hooks_initted = 1;
}
TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
return (0);
}
/*
* Deregister an ioctl handler.
*/
void
acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
{
struct acpi_ioctl_hook *hp;
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);
}
}
static int
acpiopen(dev_t dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
acpiclose(dev_t dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
{
struct acpi_softc *sc;
struct acpi_ioctl_hook *hp;
int error, xerror, state;
ACPI_LOCK_DECL;
ACPI_LOCK;
error = state = 0;
sc = dev->si_drv1;
/*
* Scan the list of registered ioctls, looking for handlers.
*/
if (acpi_ioctl_hooks_initted) {
TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
if (hp->cmd == cmd) {
xerror = hp->fn(cmd, addr, hp->arg);
if (xerror != 0)
error = xerror;
goto out;
}
}
}
/*
* 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_ENABLE:
if (ACPI_FAILURE(acpi_Enable(sc)))
error = ENXIO;
break;
case ACPIIO_DISABLE:
if (ACPI_FAILURE(acpi_Disable(sc)))
error = ENXIO;
break;
case ACPIIO_SETSLPSTATE:
if (!sc->acpi_enabled) {
error = ENXIO;
break;
}
state = *(int *)addr;
if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) {
if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
error = EINVAL;
} else {
error = EINVAL;
}
break;
default:
if (error == 0)
error = EINVAL;
break;
}
out:
ACPI_UNLOCK;
return (error);
}
static int
acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
{
char sleep_state[4];
char buf[16];
int error;
UINT8 state, TypeA, TypeB;
buf[0] = '\0';
for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) {
if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
sprintf(sleep_state, "S%d ", state);
strcat(buf, sleep_state);
}
}
error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
return (error);
}
static int
acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
{
char sleep_state[10];
int error;
u_int new_state, old_state;
old_state = *(u_int *)oidp->oid_arg1;
if (old_state > ACPI_S_STATES_MAX + 1) {
strcpy(sleep_state, "unknown");
} else {
bzero(sleep_state, sizeof(sleep_state));
strncpy(sleep_state, sleep_state_names[old_state],
sizeof(sleep_state_names[old_state]));
}
error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
if (error == 0 && req->newptr != NULL) {
new_state = ACPI_STATE_S0;
for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) {
if (strncmp(sleep_state, sleep_state_names[new_state],
sizeof(sleep_state)) == 0)
break;
}
if (new_state <= ACPI_S_STATES_MAX + 1) {
if (new_state != old_state)
*(u_int *)oidp->oid_arg1 = new_state;
} else {
error = EINVAL;
}
}
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_ERROR", ACPI_LV_ERROR},
{"ACPI_LV_WARN", ACPI_LV_WARN},
{"ACPI_LV_INIT", ACPI_LV_INIT},
{"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
{"ACPI_LV_INFO", ACPI_LV_INFO},
{"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 = getenv("debug.acpi.layer");
level = 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;
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. */
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);
/* Copy out the old values to the user. */
error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
sbuf_delete(&sb);
/* If the user is setting a string, parse it. */
if (error == 0 && req->newptr != NULL) {
*dbg = 0;
setenv((char *)oidp->oid_arg1, (char *)req->newptr);
acpi_set_debugging(NULL);
}
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
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;
}
acpi_SetSleepState(sc, acpi_state);
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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