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32d18aa566
freebsd-nq/sys/dev/acpica/acpi.c
Mike Smith 32d18aa566 Allow the ACPI subsystem to be disabled with a hint. 
Avoid fully initialising the ACPI namespace if we are attempting to avoid
parts of it.  This is a workaround for some systems that still crash
the interpreter.

Implement the ISA_IVAR_LOGICALID for ISA compatibility.  Implement stubs
for other PnP ID-related ivars.
2001-09-07 02:57:29 +00:00

1832 lines
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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/lock.h>
#include <sys/malloc.h>
#include <sys/mutex.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 <machine/clock.h>
#include <machine/resource.h>
#include <isa/isavar.h>
#include "acpi.h"
#include <dev/acpica/acpivar.h>
#include <dev/acpica/acpiio.h>
MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
/*
* Hooks for the ACPI CA debugging infrastructure
*/
#define _COMPONENT ACPI_BUS
MODULE_NAME("ACPI")
/*
* Character device
*/
static d_open_t acpiopen;
static d_close_t acpiclose;
static d_ioctl_t acpiioctl;
#define CDEV_MAJOR 152
static struct cdevsw acpi_cdevsw = {
acpiopen,
acpiclose,
noread,
nowrite,
acpiioctl,
nopoll,
nommap,
nostrategy,
"acpi",
CDEV_MAJOR,
nodump,
nopsize,
0
};
static const char* sleep_state_names[] = {
"S0", "S1", "S2", "S3", "S4", "S5", "S4B" };
/* this has to be static, as the softc is gone when we need it */
static int acpi_off_state = ACPI_STATE_S5;
struct mtx acpi_mutex;
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 device_t acpi_add_child(device_t bus, int order, const char *name, int unit);
static int acpi_print_resources(struct resource_list *rl, const char *name, int type,
const char *format);
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 u_int32_t acpi_isa_get_logicalid(device_t dev);
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_enable_fixed_events(struct acpi_softc *sc);
static void acpi_system_eventhandler_sleep(void *arg, int state);
static void acpi_system_eventhandler_wakeup(void *arg, int state);
static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
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, bus_generic_shutdown),
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_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),
};
devclass_t acpi_devclass;
DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
MODULE_VERSION(acpi, 100);
SYSCTL_INT(_debug, OID_AUTO, acpi_debug_layer, CTLFLAG_RW, &AcpiDbgLayer, 0, "");
SYSCTL_INT(_debug, OID_AUTO, acpi_debug_level, CTLFLAG_RW, &AcpiDbgLevel, 0, "");
static int acpi_ca_version = ACPI_CA_VERSION;
SYSCTL_INT(_debug, OID_AUTO, acpi_ca_version, CTLFLAG_RD, &acpi_ca_version, 0, "");
/*
* 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)
return(EPERM);
break;
case MOD_UNLOAD:
return(EBUSY);
default:
break;
}
return(0);
}
/*
* Detect ACPI, perform early initialisation
*/
static void
acpi_identify(driver_t *driver, device_t parent)
{
device_t child;
int error;
#ifdef ENABLE_DEBUGGER
char *debugpoint = getenv("debug.acpi.debugger");
#endif
FUNCTION_TRACE(__func__);
if(!cold){
printf("Don't load this driver from userland!!\n");
return ;
}
/*
* Check that we haven't been disabled with a hint.
*/
if (!resource_int_value("acpi", 0, "disabled", &error) &&
(error != 0))
return_VOID;
/*
* Make sure we're not being doubly invoked.
*/
if (device_find_child(parent, "acpi", 0) != NULL)
return_VOID;
/* initialise the ACPI mutex */
mtx_init(&acpi_mutex, "ACPI global lock", MTX_DEF);
/*
* Start up the ACPI CA subsystem.
*/
#ifdef ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "init"))
acpi_EnterDebugger();
#endif
if ((error = AcpiInitializeSubsystem()) != AE_OK) {
printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
return_VOID;
}
#ifdef ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "tables"))
acpi_EnterDebugger();
#endif
if ((error = AcpiLoadTables()) != AE_OK) {
printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
return_VOID;
}
/*
* 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];
ACPI_STATUS status;
int error;
FUNCTION_TRACE(__func__);
ACPI_LOCK;
if ((status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th)) != AE_OK) {
device_printf(dev, "couldn't get XSDT header: %s\n", AcpiFormatException(status));
error = ENXIO;
} else {
sprintf(buf, "%.6s %.8s", th.OemId, th.OemTableId);
device_set_desc_copy(dev, buf);
error = 0;
}
ACPI_UNLOCK;
return_VALUE(error);
}
static int
acpi_attach(device_t dev)
{
struct acpi_softc *sc;
ACPI_STATUS status;
int error;
UINT32 flags;
#ifdef ENABLE_DEBUGGER
char *debugpoint = getenv("debug.acpi.debugger");
#endif
FUNCTION_TRACE(__func__);
ACPI_LOCK;
sc = device_get_softc(dev);
bzero(sc, sizeof(*sc));
sc->acpi_dev = dev;
acpi_install_wakeup_handler(sc);
#ifdef ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "spaces"))
acpi_EnterDebugger();
#endif
/*
* Install the default address space handlers.
*/
error = ENXIO;
if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_MEMORY,
ACPI_DEFAULT_HANDLER,
NULL, NULL)) != AE_OK) {
device_printf(dev, "could not initialise SystemMemory handler: %s\n", AcpiFormatException(status));
goto out;
}
if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_SYSTEM_IO,
ACPI_DEFAULT_HANDLER,
NULL, NULL)) != AE_OK) {
device_printf(dev, "could not initialise SystemIO handler: %s\n", AcpiFormatException(status));
goto out;
}
if ((status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_DEFAULT_HANDLER,
NULL, NULL)) != AE_OK) {
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 ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "enable"))
acpi_EnterDebugger();
#endif
flags = 0;
if (getenv("debug.acpi.disable") != NULL)
flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
if ((status = AcpiEnableSubsystem(flags)) != AE_OK) {
device_printf(dev, "could not enable ACPI: %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, "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", "");
/*
* Dispatch the default sleep state to devices.
* TBD: should be configured from userland policy manager.
*/
sc->acpi_power_button_sx = ACPI_POWER_BUTTON_DEFAULT_SX;
sc->acpi_sleep_button_sx = ACPI_SLEEP_BUTTON_DEFAULT_SX;
sc->acpi_lid_switch_sx = ACPI_LID_SWITCH_DEFAULT_SX;
acpi_enable_fixed_events(sc);
/*
* Scan the namespace and attach/initialise children.
*/
#ifdef ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "probe"))
acpi_EnterDebugger();
#endif
if (!acpi_disabled("bus"))
acpi_probe_children(dev);
/*
* 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;
/*
* Create the control device
*/
sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, 0, 5, 0660, "acpi");
sc->acpi_dev_t->si_drv1 = sc;
#ifdef ENABLE_DEBUGGER
if (debugpoint && !strcmp(debugpoint, "running"))
acpi_EnterDebugger();
#endif
error = 0;
out:
ACPI_UNLOCK;
return_VALUE(error);
}
/*
* 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)) == NULL)
return(NULL);
bzero(ad, sizeof(*ad));
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);
}
/*
* Print child device resource usage
*/
static int
acpi_print_resources(struct resource_list *rl, const char *name, int type, const char *format)
{
struct resource_list_entry *rle;
int printed, retval;
printed = 0;
retval = 0;
if (!SLIST_FIRST(rl))
return(0);
/* Yes, this is kinda cheating */
SLIST_FOREACH(rle, rl, link) {
if (rle->type == type) {
if (printed == 0)
retval += printf(" %s ", name);
else if (printed > 0)
retval += printf(",");
printed++;
retval += printf(format, rle->start);
if (rle->count > 1) {
retval += printf("-");
retval += printf(format, rle->start +
rle->count - 1);
}
}
}
return(retval);
}
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 += acpi_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx");
retval += acpi_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx");
retval += acpi_print_resources(rl, "irq", SYS_RES_IRQ, "%ld");
retval += bus_print_child_footer(bus, child);
return(retval);
}
/*
* 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);
}
switch(index) {
/* ACPI ivars */
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;
/* ISA compatibility */
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:
panic("bad ivar read request (%d)\n", index);
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) {
/* ACPI ivars */
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)\n", 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));
}
/*
* 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 u_int32_t
acpi_isa_get_logicalid(device_t dev)
{
ACPI_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
u_int32_t pnpid;
FUNCTION_TRACE(__func__);
pnpid = 0;
ACPI_LOCK;
/* fetch and validate the HID */
if ((h = acpi_get_handle(dev)) == NULL)
goto out;
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
goto out;
if (!(devinfo.Valid & ACPI_VALID_HID))
goto out;
pnpid = PNP_EISAID(devinfo.HardwareId);
out:
ACPI_UNLOCK;
return_VALUE(pnpid);
}
static int
acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
{
int result;
u_int32_t pnpid;
FUNCTION_TRACE(__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 */
pnpid = acpi_isa_get_logicalid(child);
while (ids && ids->ip_id) {
if (pnpid == 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;
static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI", "\\_SB_", NULL};
int i;
FUNCTION_TRACE(__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++)
if ((AcpiGetHandle(ACPI_ROOT_OBJECT, scopes[i], &parent)) == AE_OK)
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);
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;
FUNCTION_TRACE(__func__);
/*
* Skip this device if we think we'll have trouble with it.
*/
if (acpi_avoid(handle))
return_ACPI_STATUS(AE_OK);
if (AcpiGetType(handle, &type) == AE_OK) {
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);
/*
* 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);
/* if we're debugging, probe/attach now rather than later */
DEBUG_EXEC(device_probe_and_attach(child));
break;
}
}
return_ACPI_STATUS(AE_OK);
}
static void
acpi_shutdown_pre_sync(void *arg, int howto)
{
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.
*/
acpi_Disable((struct acpi_softc *)arg);
}
static void
acpi_shutdown_final(void *arg, int howto)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
if (howto & RB_POWEROFF) {
printf("Power system off using ACPI...\n");
if ((status = AcpiEnterSleepState(acpi_off_state)) != AE_OK) {
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;
#define MSGFORMAT "%s button is handled as a fixed feature programming model.\n"
ACPI_ASSERTLOCK;
/* Enable and clear fixed events and install handlers. */
if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->PwrButton == 0)) {
AcpiEnableEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
AcpiClearEvent(ACPI_EVENT_POWER_BUTTON, ACPI_EVENT_FIXED);
AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
acpi_eventhandler_power_button_for_sleep, sc);
if (first_time) {
device_printf(sc->acpi_dev, MSGFORMAT, "power");
}
}
if ((AcpiGbl_FADT != NULL) && (AcpiGbl_FADT->SleepButton == 0)) {
AcpiEnableEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON, ACPI_EVENT_FIXED);
AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
acpi_eventhandler_sleep_button_for_sleep, sc);
if (first_time) {
device_printf(sc->acpi_dev, MSGFORMAT, "sleep");
}
}
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_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
ACPI_ASSERTLOCK;
if ((h = acpi_get_handle(dev)) == NULL)
return(FALSE);
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
return(FALSE);
/* XXX 0xf is probably not appropriate */
if ((devinfo.Valid & ACPI_VALID_HID) && (devinfo.CurrentStatus & 0xf))
return(TRUE);
return(FALSE);
}
/*
* Match a HID string against a device
*/
BOOLEAN
acpi_MatchHid(device_t dev, char *hid)
{
ACPI_HANDLE h;
ACPI_DEVICE_INFO devinfo;
ACPI_STATUS error;
ACPI_ASSERTLOCK;
if (hid == NULL)
return(FALSE);
if ((h = acpi_get_handle(dev)) == NULL)
return(FALSE);
if ((error = AcpiGetObjectInfo(h, &devinfo)) != AE_OK)
return(FALSE);
if ((devinfo.Valid & ACPI_VALID_HID) && !strcmp(hid, devinfo.HardwareId))
return(TRUE);
return(FALSE);
}
/*
* 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 (status == AE_OK) {
*result = r;
return(AE_OK);
}
if (status != AE_NOT_FOUND)
return(AE_OK);
if (AcpiGetParent(parent, &r) != AE_OK)
return(AE_NOT_FOUND);
parent = r;
}
}
/*
* Allocate a buffer with a preset data size.
*/
ACPI_BUFFER *
acpi_AllocBuffer(int size)
{
ACPI_BUFFER *buf;
if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
return(NULL);
buf->Length = size;
buf->Pointer = (void *)(buf + 1);
return(buf);
}
/*
* Perform the tedious double-get procedure required for fetching something into
* an ACPI_BUFFER that has not been initialised.
*/
ACPI_STATUS
acpi_GetIntoBuffer(ACPI_HANDLE handle, ACPI_STATUS (*func)(ACPI_HANDLE, ACPI_BUFFER *), ACPI_BUFFER *buf)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
buf->Length = 0;
buf->Pointer = NULL;
if ((status = func(handle, buf)) != AE_BUFFER_OVERFLOW)
return(status);
if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL)
return(AE_NO_MEMORY);
return(func(handle, buf));
}
/*
* Perform the tedious double-get procedure required for fetching a table into
* an ACPI_BUFFER that has not been initialised.
*/
ACPI_STATUS
acpi_GetTableIntoBuffer(ACPI_TABLE_TYPE table, UINT32 instance, ACPI_BUFFER *buf)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
buf->Length = 0;
buf->Pointer = NULL;
if ((status = AcpiGetTable(table, instance, buf)) != AE_BUFFER_OVERFLOW)
return(status);
if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL)
return(AE_NO_MEMORY);
return(AcpiGetTable(table, instance, buf));
}
/*
* Perform the tedious double-evaluate procedure for evaluating something into
* an ACPI_BUFFER that has not been initialised. Note that this evaluates
* twice, so avoid applying this to things that may have side-effects.
*
* This is like AcpiEvaluateObject with automatic buffer allocation.
*/
ACPI_STATUS
acpi_EvaluateIntoBuffer(ACPI_HANDLE object, ACPI_STRING pathname, ACPI_OBJECT_LIST *params,
ACPI_BUFFER *buf)
{
ACPI_STATUS status;
ACPI_ASSERTLOCK;
buf->Length = 0;
buf->Pointer = NULL;
if ((status = AcpiEvaluateObject(object, pathname, params, buf)) != AE_BUFFER_OVERFLOW)
return(status);
if ((buf->Pointer = AcpiOsCallocate(buf->Length)) == NULL)
return(AE_NO_MEMORY);
return(AcpiEvaluateObject(object, pathname, params, buf));
}
/*
* Evaluate a path that should return an integer.
*/
ACPI_STATUS
acpi_EvaluateInteger(ACPI_HANDLE handle, char *path, int *number)
{
ACPI_STATUS error;
ACPI_BUFFER buf;
ACPI_OBJECT param, *p;
int i;
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);
if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) {
if (param.Type == ACPI_TYPE_INTEGER) {
*number = param.Integer.Value;
} else {
error = 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 (error == AE_BUFFER_OVERFLOW) {
if ((buf.Pointer = AcpiOsCallocate(buf.Length)) == NULL) {
error = AE_NO_MEMORY;
} else {
if ((error = AcpiEvaluateObject(handle, path, NULL, &buf)) == AE_OK) {
p = (ACPI_OBJECT *)buf.Pointer;
if (p->Type != ACPI_TYPE_BUFFER) {
error = AE_TYPE;
} else {
if (p->Buffer.Length > sizeof(int)) {
error = AE_BAD_DATA;
} else {
*number = 0;
for (i = 0; i < p->Buffer.Length; i++)
*number += (*(p->Buffer.Pointer + i) << (i * 8));
}
}
}
}
AcpiOsFree(buf.Pointer);
}
return(error);
}
/*
* 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 */
for (i = 0, comp = pkg->Package.Elements; 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_RESOURCE_NEXT(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_RESOURCE_NEXT(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_RESOURCE_NEXT(rp);
rp->Id = ACPI_RSTYPE_END_TAG;
rp->Length = 0;
return(AE_OK);
}
/*
* Set the system sleep state
*
* Currently we only support S1 and S5
*/
ACPI_STATUS
acpi_SetSleepState(struct acpi_softc *sc, int state)
{
ACPI_STATUS status = AE_OK;
UINT16 Count;
UINT8 TypeA;
UINT8 TypeB;
FUNCTION_TRACE_U32(__func__, state);
ACPI_ASSERTLOCK;
switch (state) {
case ACPI_STATE_S0: /* XXX only for testing */
status = AcpiEnterSleepState((UINT8)state);
if (status != AE_OK) {
device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
}
break;
case ACPI_STATE_S1:
case ACPI_STATE_S2:
case ACPI_STATE_S3:
case ACPI_STATE_S4:
status = AcpiHwObtainSleepTypeRegisterData((UINT8)state, &TypeA, &TypeB);
if (status != AE_OK) {
device_printf(sc->acpi_dev, "AcpiHwObtainSleepTypeRegisterData failed - %s\n", AcpiFormatException(status));
break;
}
/*
* 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);
}
sc->acpi_sstate = state;
if (state != ACPI_STATE_S1) {
acpi_sleep_machdep(sc, state);
/* AcpiEnterSleepState() maybe incompleted, unlock here. */
AcpiUtReleaseMutex(ACPI_MTX_HARDWARE);
/* Re-enable ACPI hardware on wakeup from sleep state 4. */
if (state >= ACPI_STATE_S4) {
acpi_Disable(sc);
acpi_Enable(sc);
}
} else {
status = AcpiEnterSleepState((UINT8)state);
if (status != AE_OK) {
device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", AcpiFormatException(status));
break;
}
/* wait for the WAK_STS bit */
Count = 0;
while (!(AcpiHwRegisterBitAccess(ACPI_READ, ACPI_MTX_LOCK, WAK_STS))) {
AcpiOsSleep(0, 1);
/*
* Some BIOSes don't set WAK_STS at all,
* give up waiting for wakeup if we time out.
*/
if (Count > 1000) {
break; /* giving up */
}
Count++;
}
}
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;
default:
status = AE_BAD_PARAMETER;
break;
}
return_ACPI_STATUS(status);
}
/*
* Enable/Disable ACPI
*/
ACPI_STATUS
acpi_Enable(struct acpi_softc *sc)
{
ACPI_STATUS status;
u_int32_t flags;
FUNCTION_TRACE(__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;
FUNCTION_TRACE(__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)
{
FUNCTION_TRACE_U32(__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)
{
FUNCTION_TRACE_U32(__func__, state);
/* Well, what to do? :-) */
ACPI_LOCK;
ACPI_UNLOCK;
return_VOID;
}
/*
* ACPICA Event Handlers (FixedEvent, also called from button notify handler)
*/
UINT32
acpi_eventhandler_power_button_for_sleep(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
FUNCTION_TRACE(__func__);
EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
return_VALUE(INTERRUPT_HANDLED);
}
UINT32
acpi_eventhandler_power_button_for_wakeup(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
FUNCTION_TRACE(__func__);
EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
return_VALUE(INTERRUPT_HANDLED);
}
UINT32
acpi_eventhandler_sleep_button_for_sleep(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
FUNCTION_TRACE(__func__);
EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
return_VALUE(INTERRUPT_HANDLED);
}
UINT32
acpi_eventhandler_sleep_button_for_wakeup(void *context)
{
struct acpi_softc *sc = (struct acpi_softc *)context;
FUNCTION_TRACE(__func__);
EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
return_VALUE(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 (AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf.buffer) == AE_OK)
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, *np;
int len;
np = acpi_name(handle);
if (*np == '\\')
np++;
if ((cp = getenv("debug.acpi.avoid")) == NULL)
return(0);
/* scan the avoid list checking for a match */
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))
return(1);
cp += len;
}
return(0);
}
/*
* Debugging/bug-avoidance. Disable ACPI subsystem components.
*/
int
acpi_disabled(char *subsys)
{
char *cp;
int len;
if ((cp = getenv("debug.acpi.disable")) == NULL)
return(0);
if (!strcmp(cp, "all"))
return(1);
/* scan the disable list checking for a match */
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))
return(1);
cp += len;
}
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;
int (* fn)(u_long cmd, caddr_t addr, void *arg);
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, int (* fn)(u_long cmd, caddr_t addr, void *arg), 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, int (* fn)(u_long cmd, caddr_t addr, void *arg))
{
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, struct proc *p)
{
return(0);
}
static int
acpiclose(dev_t dev, int flag, int fmt, struct proc *p)
{
return(0);
}
static int
acpiioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p)
{
struct acpi_softc *sc;
struct acpi_ioctl_hook *hp;
int error, xerror, state;
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 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) {
acpi_SetSleepState(sc, state);
} else {
error = EINVAL;
}
break;
default:
if (error == 0)
error = EINVAL;
break;
}
out:
ACPI_UNLOCK;
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) {
strcpy(sleep_state, "unknown");
} else {
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) {
for (new_state = ACPI_STATE_S0; new_state <= ACPI_S_STATES_MAX; new_state++) {
if (strncmp(sleep_state, sleep_state_names[new_state],
sizeof(sleep_state)) == 0)
break;
}
if ((new_state != old_state) && (new_state <= ACPI_S_STATES_MAX)) {
*(u_int *)oidp->oid_arg1 = new_state;
} else {
error = EINVAL;
}
}
return(error);
}
#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_DEBUGGER", ACPI_DEBUGGER},
{"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
{"ACPI_BUS", ACPI_BUS},
{"ACPI_SYSTEM", ACPI_SYSTEM},
{"ACPI_POWER", ACPI_POWER},
{"ACPI_EC", ACPI_EC},
{"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
{"ACPI_BATTERY", ACPI_BATTERY},
{"ACPI_BUTTON", ACPI_BUTTON},
{"ACPI_PROCESSOR", ACPI_PROCESSOR},
{"ACPI_THERMAL", ACPI_THERMAL},
{"ACPI_FAN", ACPI_FAN},
{"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
{NULL, 0}
};
static struct debugtag dbg_level[] = {
{"ACPI_LV_OK", ACPI_LV_OK},
{"ACPI_LV_INFO", ACPI_LV_INFO},
{"ACPI_LV_WARN", ACPI_LV_WARN},
{"ACPI_LV_ERROR", ACPI_LV_ERROR},
{"ACPI_LV_FATAL", ACPI_LV_FATAL},
{"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
{"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
{"ACPI_LV_THREADS", ACPI_LV_THREADS},
{"ACPI_LV_PARSE", ACPI_LV_PARSE},
{"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
{"ACPI_LV_LOAD", ACPI_LV_LOAD},
{"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_FUNCTIONS", ACPI_LV_FUNCTIONS},
{"ACPI_LV_VALUES", ACPI_LV_VALUES},
{"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
{"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
{"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
{"ACPI_LV_IO", ACPI_LV_IO},
{"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
{"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
{"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
{"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
{"ACPI_LV_INIT", ACPI_LV_INIT},
{"ACPI_LV_ALL", ACPI_LV_ALL},
{"ACPI_DB_AML_DISASSEMBLE", ACPI_DB_AML_DISASSEMBLE},
{"ACPI_DB_VERBOSE_INFO", ACPI_DB_VERBOSE_INFO},
{"ACPI_DB_FULL_TABLES", ACPI_DB_FULL_TABLES},
{"ACPI_DB_EVENTS", ACPI_DB_EVENTS},
{"ACPI_DB_VERBOSE", ACPI_DB_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;
}
printf("ACPI_DEBUG: set '%s'\n", tag[i].name);
}
}
cp = ep;
}
}
static void
acpi_set_debugging(void *junk)
{
char *cp;
AcpiDbgLayer = 0;
AcpiDbgLevel = 0;
if ((cp = getenv("debug.acpi.layer")) != NULL)
acpi_parse_debug(cp, &dbg_layer[0], &AcpiDbgLayer);
if ((cp = getenv("debug.acpi.level")) != NULL)
acpi_parse_debug(cp, &dbg_level[0], &AcpiDbgLevel);
printf("ACPI debug layer 0x%x debug level 0x%x\n", AcpiDbgLayer, AcpiDbgLevel);
}
SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, NULL);
#endif
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