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freebsd-skq/sys/dev/acpica/acpi.c
njl 207d886bed Update the interface for child drivers. Add acpi_scan_children, which 
allows a bus to re-enumerate its child handles and optionally replace
them with new children, arranged to the bus's liking.  (The current device
space is flat with all devices immediately under acpi0).  Add comments
for each interface.
2004-07-15 16:29:08 +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 <isa/pnpvar.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",
};
/* Global mutex for locking access to the ACPI subsystem. */
struct mtx acpi_mutex;
/* Bitmap of device quirks. */
int acpi_quirks;
/* Local pools for managing system resources for ACPI child devices. */
struct rman acpi_rman_io, acpi_rman_mem;
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 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 struct resource_list *acpi_get_rlist(device_t dev, device_t child);
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 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_isa_pnp_probe(device_t bus, device_t child,
struct isa_pnp_id *ids);
static void acpi_probe_children(device_t bus);
static int acpi_probe_order(ACPI_HANDLE handle, int *order);
static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
void *context, void **status);
static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid);
static void acpi_shutdown_final(void *arg, int howto);
static void acpi_enable_fixed_events(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_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_get_resource_list, acpi_get_rlist),
DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
DEVMETHOD(bus_get_resource, bus_generic_rl_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),
/* ACPI bus */
DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
/* 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 started = 0;
int error, val;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (started)
return_VALUE (0);
started = 1;
/* 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_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));
AcpiTerminate();
return_VALUE (error);
}
/* Set up any quirks we have for this system. */
acpi_table_quirks(&acpi_quirks);
/* If the user manually set the disabled hint to 0, override any quirk. */
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");
AcpiTerminate();
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;
/* 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 = "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 = "I/O memory addresses";
if (rman_init(&acpi_rman_mem) != 0)
panic("acpi rman_init memory failed");
#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");
/*
* 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 = 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 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 = 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);
/* Enable any GPEs that are able to power-on the system (i.e., RTC). */
acpi_wake_prep_walk(ACPI_STATE_S5);
return (0);
}
/*
* 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, "handle=%s", acpi_name(dinfo->ad_handle));
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)
{
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 : "none",
(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 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) {
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;
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 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 = device_get_ivars(child);
struct resource_list *rl = &ad->ad_rl;
struct resource_list_entry *rle;
struct resource *res;
struct rman *rm;
/*
* If this is an allocation of the "default" range for a given RID, and
* we know what the resources for this device are (i.e., they're on the
* child's resource list), use those start/end values.
*/
if (start == 0UL && end == ~0UL) {
rle = resource_list_find(rl, type, *rid);
if (rle == NULL)
return (NULL);
start = rle->start;
end = rle->end;
count = rle->count;
}
/* If we don't manage this address, pass the request up to the parent. */
rle = acpi_sysres_find(type, start);
if (rle == NULL) {
res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
start, end, count, flags);
} else {
/* We only handle memory and IO resources through rman. */
switch (type) {
case SYS_RES_IOPORT:
rm = &acpi_rman_io;
break;
case SYS_RES_MEMORY:
rm = &acpi_rman_mem;
break;
default:
panic("acpi_alloc_resource: invalid res type %d", type);
}
/* If we do know it, allocate it from the local pool. */
res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
child);
if (res == NULL)
return (NULL);
/* Copy the bus tag and handle from the pre-allocated resource. */
rman_set_bustag(res, rman_get_bustag(rle->res));
rman_set_bushandle(res, rman_get_start(res));
/* 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);
}
}
if (res != NULL && device_get_parent(child) == bus)
switch (type) {
case 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);
break;
}
return (res);
}
static int
acpi_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
int ret;
/*
* If we know about this address, deactivate it and release it to the
* local pool. If we don't, pass this request up to the parent.
*/
if (acpi_sysres_find(type, rman_get_start(r)) == NULL) {
if (rman_get_flags(r) & RF_ACTIVE) {
ret = bus_deactivate_resource(child, type, rid, r);
if (ret != 0)
return (ret);
}
ret = rman_release_resource(r);
} else
ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
return (ret);
}
/* 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));
}
/* Probe _HID and _CID for compatible ISA PNP ids. */
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 char *
acpi_device_id_probe(device_t bus, device_t dev, char **ids)
{
ACPI_HANDLE h;
int i;
h = acpi_get_handle(dev);
if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
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));
}
/* 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, &ctx, NULL));
}
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;
int i;
static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
ACPI_ASSERTLOCK;
/*
* 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"));
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);
}
}
/* 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 staticly and from the namespace. */
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;
}
/*
* Determine the probe order for a given device and return non-zero if it
* should be attached immediately.
*/
static int
acpi_probe_order(ACPI_HANDLE handle, int *order)
{
int ret;
/*
* 1. I/O port and memory system resource holders
* 2. Embedded controllers (to handle early accesses)
*/
ret = 0;
if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) {
*order = 1;
ret = 1;
} else if (acpi_MatchHid(handle, "PNP0C09")) {
*order = 2;
ret = 1;
}
/* Always probe/attach immediately if we're debugging. */
ACPI_DEBUG_EXEC(ret = 1);
return (ret);
}
/*
* 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;
int order, probe_now;
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);
bus = (device_t)context;
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. Orders
* less than 10 are reserved for special objects (i.e., system
* resources). Larger values are used for all other devices.
*/
ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n",
acpi_name(handle)));
order = (level + 1) * 10;
probe_now = 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).
*/
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 order was overridden, probe/attach now rather than later. */
if (probe_now)
device_probe_and_attach(child);
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, UINT32 fn, void *data)
{
}
static void
acpi_shutdown_final(void *arg, int howto)
{
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)) {
printf("AcpiEnterSleepStatePrep failed - %s\n",
AcpiFormatException(status));
return;
}
printf("Powering system off using ACPI\n");
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");
}
} else {
printf("Shutting down ACPI\n");
AcpiTerminate();
}
}
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 handle
*/
static BOOLEAN
acpi_MatchHid(ACPI_HANDLE h, const char *hid)
{
ACPI_DEVICE_INFO *devinfo;
ACPI_BUFFER buf;
ACPI_STATUS error;
int ret, i;
ACPI_ASSERTLOCK;
ret = FALSE;
if (hid == NULL || h == NULL)
return (ret);
buf.Pointer = NULL;
buf.Length = ACPI_ALLOCATE_BUFFER;
error = AcpiGetObjectInfo(h, &buf);
if (ACPI_FAILURE(error))
return (ret);
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;
/* Enable any GPEs as appropriate and requested by the user. */
acpi_wake_prep_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;
}
}
/* Resume devices, re-enable GPEs and fixed events. */
acpi_wake_prep_walk(state);
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;
/* 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 and get the GPE. */
handle = acpi_get_handle(dev);
if (acpi_parse_prw(handle, &prw) != 0)
return (ENXIO);
flags = acpi_get_flags(dev);
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);
}
acpi_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);
}
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) {
AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
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) {
AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
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, &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)
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);
}
/*
* 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(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
{
return (0);
}
static int
acpiioctl(struct cdev *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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