diff options
Diffstat (limited to 'sys/dev/acpica/acpi.c')
| -rw-r--r-- | sys/dev/acpica/acpi.c | 3862 |
1 files changed, 3862 insertions, 0 deletions
diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c new file mode 100644 index 0000000..fc5fec1 --- /dev/null +++ b/sys/dev/acpica/acpi.c @@ -0,0 +1,3862 @@ +/*- + * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> + * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> + * Copyright (c) 2000, 2001 Michael Smith + * Copyright (c) 2000 BSDi + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include "opt_acpi.h" +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/proc.h> +#include <sys/fcntl.h> +#include <sys/malloc.h> +#include <sys/module.h> +#include <sys/bus.h> +#include <sys/conf.h> +#include <sys/ioccom.h> +#include <sys/reboot.h> +#include <sys/sysctl.h> +#include <sys/ctype.h> +#include <sys/linker.h> +#include <sys/power.h> +#include <sys/sbuf.h> +#include <sys/sched.h> +#include <sys/smp.h> +#include <sys/timetc.h> + +#if defined(__i386__) || defined(__amd64__) +#include <machine/pci_cfgreg.h> +#endif +#include <machine/resource.h> +#include <machine/bus.h> +#include <sys/rman.h> +#include <isa/isavar.h> +#include <isa/pnpvar.h> + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acnamesp.h> + +#include <dev/acpica/acpivar.h> +#include <dev/acpica/acpiio.h> + +#include <vm/vm_param.h> + +static MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); + +/* Hooks for the ACPI CA debugging infrastructure */ +#define _COMPONENT ACPI_BUS +ACPI_MODULE_NAME("ACPI") + +static d_open_t acpiopen; +static d_close_t acpiclose; +static d_ioctl_t acpiioctl; + +static struct cdevsw acpi_cdevsw = { + .d_version = D_VERSION, + .d_open = acpiopen, + .d_close = acpiclose, + .d_ioctl = acpiioctl, + .d_name = "acpi", +}; + +struct acpi_interface { + ACPI_STRING *data; + int num; +}; + +/* Global mutex for locking access to the ACPI subsystem. */ +struct mtx acpi_mutex; + +/* Bitmap of device quirks. */ +int acpi_quirks; + +/* Supported sleep states. */ +static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; + +static int acpi_modevent(struct module *mod, int event, void *junk); +static int acpi_probe(device_t dev); +static int acpi_attach(device_t dev); +static int acpi_suspend(device_t dev); +static int acpi_resume(device_t dev); +static int acpi_shutdown(device_t dev); +static device_t acpi_add_child(device_t bus, u_int order, const char *name, + int unit); +static int acpi_print_child(device_t bus, device_t child); +static void acpi_probe_nomatch(device_t bus, device_t child); +static void acpi_driver_added(device_t dev, driver_t *driver); +static int acpi_read_ivar(device_t dev, device_t child, int index, + uintptr_t *result); +static int acpi_write_ivar(device_t dev, device_t child, int index, + uintptr_t value); +static struct resource_list *acpi_get_rlist(device_t dev, device_t child); +static void acpi_reserve_resources(device_t dev); +static int acpi_sysres_alloc(device_t dev); +static int acpi_set_resource(device_t dev, device_t child, int type, + int rid, u_long start, u_long count); +static struct resource *acpi_alloc_resource(device_t bus, device_t child, + int type, int *rid, u_long start, u_long end, + u_long count, u_int flags); +static int acpi_adjust_resource(device_t bus, device_t child, int type, + struct resource *r, u_long start, u_long end); +static int acpi_release_resource(device_t bus, device_t child, int type, + int rid, struct resource *r); +static void acpi_delete_resource(device_t bus, device_t child, int type, + int rid); +static uint32_t acpi_isa_get_logicalid(device_t dev); +static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); +static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); +static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, + ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, + ACPI_BUFFER *ret); +static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, + void *context, void **retval); +static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, + int max_depth, acpi_scan_cb_t user_fn, void *arg); +static int acpi_set_powerstate(device_t child, int state); +static int acpi_isa_pnp_probe(device_t bus, device_t child, + struct isa_pnp_id *ids); +static void acpi_probe_children(device_t bus); +static void acpi_probe_order(ACPI_HANDLE handle, int *order); +static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, + void *context, void **status); +static void acpi_sleep_enable(void *arg); +static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); +static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); +static void acpi_shutdown_final(void *arg, int howto); +static void acpi_enable_fixed_events(struct acpi_softc *sc); +static BOOLEAN acpi_has_hid(ACPI_HANDLE handle); +static void acpi_resync_clock(struct acpi_softc *sc); +static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); +static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); +static int acpi_wake_prep_walk(int sstate); +static int acpi_wake_sysctl_walk(device_t dev); +static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); +static void acpi_system_eventhandler_sleep(void *arg, int state); +static void acpi_system_eventhandler_wakeup(void *arg, int state); +static int acpi_sname2sstate(const char *sname); +static const char *acpi_sstate2sname(int sstate); +static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); +static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); +static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); +static int acpi_pm_func(u_long cmd, void *arg, ...); +static int acpi_child_location_str_method(device_t acdev, device_t child, + char *buf, size_t buflen); +static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, + char *buf, size_t buflen); +#if defined(__i386__) || defined(__amd64__) +static void acpi_enable_pcie(void); +#endif +static void acpi_hint_device_unit(device_t acdev, device_t child, + const char *name, int *unitp); +static void acpi_reset_interfaces(device_t dev); + +static device_method_t acpi_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, acpi_probe), + DEVMETHOD(device_attach, acpi_attach), + DEVMETHOD(device_shutdown, acpi_shutdown), + DEVMETHOD(device_detach, bus_generic_detach), + DEVMETHOD(device_suspend, acpi_suspend), + DEVMETHOD(device_resume, acpi_resume), + + /* Bus interface */ + DEVMETHOD(bus_add_child, acpi_add_child), + DEVMETHOD(bus_print_child, acpi_print_child), + DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), + DEVMETHOD(bus_driver_added, acpi_driver_added), + DEVMETHOD(bus_read_ivar, acpi_read_ivar), + DEVMETHOD(bus_write_ivar, acpi_write_ivar), + DEVMETHOD(bus_get_resource_list, acpi_get_rlist), + DEVMETHOD(bus_set_resource, acpi_set_resource), + DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), + DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), + DEVMETHOD(bus_adjust_resource, acpi_adjust_resource), + DEVMETHOD(bus_release_resource, acpi_release_resource), + DEVMETHOD(bus_delete_resource, acpi_delete_resource), + DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), + DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), + DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), + DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), + DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), + DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), + DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), + + /* ACPI bus */ + DEVMETHOD(acpi_id_probe, acpi_device_id_probe), + DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), + DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), + DEVMETHOD(acpi_scan_children, acpi_device_scan_children), + + /* ISA emulation */ + DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), + + {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); + +ACPI_SERIAL_DECL(acpi, "ACPI root bus"); + +/* Local pools for managing system resources for ACPI child devices. */ +static struct rman acpi_rman_io, acpi_rman_mem; + +#define ACPI_MINIMUM_AWAKETIME 5 + +/* Holds the description of the acpi0 device. */ +static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; + +SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); +static char acpi_ca_version[12]; +SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, + acpi_ca_version, 0, "Version of Intel ACPI-CA"); + +/* + * Allow overriding _OSI methods. + */ +static char acpi_install_interface[256]; +TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, + sizeof(acpi_install_interface)); +static char acpi_remove_interface[256]; +TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, + sizeof(acpi_remove_interface)); + +/* + * Allow 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); + +/* Allow users to dump Debug objects without ACPI debugger. */ +static int acpi_debug_objects; +TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); +SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, + CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", + "Enable Debug objects"); + +/* Allow the interpreter to ignore common mistakes in BIOS. */ +static int acpi_interpreter_slack = 1; +TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); +SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN, + &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); + +#ifdef __amd64__ +/* Reset system clock while resuming. XXX Remove once tested. */ +static int acpi_reset_clock = 1; +TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); +SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, + &acpi_reset_clock, 1, "Reset system clock while resuming."); +#endif + +/* Allow users to override quirks. */ +TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); + +static int acpi_susp_bounce; +SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, + &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); + +/* + * ACPI can only be loaded as a module by the loader; activating it after + * system bootstrap time is not useful, and can be fatal to the system. + * It also cannot be unloaded, since the entire system bus hierarchy hangs + * off it. + */ +static int +acpi_modevent(struct module *mod, int event, void *junk) +{ + switch (event) { + case MOD_LOAD: + if (!cold) { + printf("The ACPI driver cannot be loaded after boot.\n"); + return (EPERM); + } + break; + case MOD_UNLOAD: + if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) + return (EBUSY); + break; + default: + break; + } + return (0); +} + +/* + * Perform early initialization. + */ +ACPI_STATUS +acpi_Startup(void) +{ + static int started = 0; + ACPI_STATUS status; + int val; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + /* Only run the startup code once. The MADT driver also calls this. */ + if (started) + return_VALUE (AE_OK); + started = 1; + + /* + * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing + * if more tables exist. + */ + if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { + printf("ACPI: Table initialisation failed: %s\n", + AcpiFormatException(status)); + return_VALUE (status); + } + + /* Set up any quirks we have for this system. */ + if (acpi_quirks == ACPI_Q_OK) + acpi_table_quirks(&acpi_quirks); + + /* If the user manually set the disabled hint to 0, force-enable ACPI. */ + if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) + acpi_quirks &= ~ACPI_Q_BROKEN; + if (acpi_quirks & ACPI_Q_BROKEN) { + printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); + status = AE_SUPPORT; + } + + return_VALUE (status); +} + +/* + * Detect ACPI and perform early initialisation. + */ +int +acpi_identify(void) +{ + ACPI_TABLE_RSDP *rsdp; + ACPI_TABLE_HEADER *rsdt; + ACPI_PHYSICAL_ADDRESS paddr; + struct sbuf sb; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (!cold) + return (ENXIO); + + /* Check that we haven't been disabled with a hint. */ + if (resource_disabled("acpi", 0)) + return (ENXIO); + + /* Check for other PM systems. */ + if (power_pm_get_type() != POWER_PM_TYPE_NONE && + power_pm_get_type() != POWER_PM_TYPE_ACPI) { + printf("ACPI identify failed, other PM system enabled.\n"); + return (ENXIO); + } + + /* Initialize root tables. */ + if (ACPI_FAILURE(acpi_Startup())) { + printf("ACPI: Try disabling either ACPI or apic support.\n"); + return (ENXIO); + } + + if ((paddr = AcpiOsGetRootPointer()) == 0 || + (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) + return (ENXIO); + if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) + paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; + else + paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; + AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); + + if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) + return (ENXIO); + sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); + sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); + sbuf_trim(&sb); + sbuf_putc(&sb, ' '); + sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); + sbuf_trim(&sb); + sbuf_finish(&sb); + sbuf_delete(&sb); + AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); + + snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); + + return (0); +} + +/* + * Fetch some descriptive data from ACPI to put in our attach message. + */ +static int +acpi_probe(device_t dev) +{ + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + device_set_desc(dev, acpi_desc); + + return_VALUE (0); +} + +static int +acpi_attach(device_t dev) +{ + struct acpi_softc *sc; + ACPI_STATUS status; + int error, state; + UINT32 flags; + UINT8 TypeA, TypeB; + char *env; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + sc = device_get_softc(dev); + sc->acpi_dev = dev; + callout_init(&sc->susp_force_to, TRUE); + + error = ENXIO; + + /* Initialize resource manager. */ + acpi_rman_io.rm_type = RMAN_ARRAY; + acpi_rman_io.rm_start = 0; + acpi_rman_io.rm_end = 0xffff; + acpi_rman_io.rm_descr = "ACPI I/O ports"; + if (rman_init(&acpi_rman_io) != 0) + panic("acpi rman_init IO ports failed"); + acpi_rman_mem.rm_type = RMAN_ARRAY; + acpi_rman_mem.rm_start = 0; + acpi_rman_mem.rm_end = ~0ul; + acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; + if (rman_init(&acpi_rman_mem) != 0) + panic("acpi rman_init memory failed"); + + /* Initialise the ACPI mutex */ + mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); + + /* + * Set the globals from our tunables. This is needed because ACPI-CA + * uses UINT8 for some values and we have no tunable_byte. + */ + AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE; + AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; + AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; + +#ifndef ACPI_DEBUG + /* + * Disable all debugging layers and levels. + */ + AcpiDbgLayer = 0; + AcpiDbgLevel = 0; +#endif + + /* Start up the ACPI CA subsystem. */ + status = AcpiInitializeSubsystem(); + if (ACPI_FAILURE(status)) { + device_printf(dev, "Could not initialize Subsystem: %s\n", + AcpiFormatException(status)); + goto out; + } + + /* Override OS interfaces if the user requested. */ + acpi_reset_interfaces(dev); + + /* Load ACPI name space. */ + status = AcpiLoadTables(); + if (ACPI_FAILURE(status)) { + device_printf(dev, "Could not load Namespace: %s\n", + AcpiFormatException(status)); + goto out; + } + +#if defined(__i386__) || defined(__amd64__) + /* Handle MCFG table if present. */ + acpi_enable_pcie(); +#endif + + /* + * Note that some systems (specifically, those with namespace evaluation + * issues that require the avoidance of parts of the namespace) must + * avoid running _INI and _STA on everything, as well as dodging the final + * object init pass. + * + * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). + * + * XXX We should arrange for the object init pass after we have attached + * all our child devices, but on many systems it works here. + */ + flags = 0; + if (testenv("debug.acpi.avoid")) + flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; + + /* Bring the hardware and basic handlers online. */ + if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { + device_printf(dev, "Could not enable ACPI: %s\n", + AcpiFormatException(status)); + goto out; + } + + /* + * Call the ECDT probe function to provide EC functionality before + * the namespace has been evaluated. + * + * XXX This happens before the sysresource devices have been probed and + * attached so its resources come from nexus0. In practice, this isn't + * a problem but should be addressed eventually. + */ + acpi_ec_ecdt_probe(dev); + + /* Bring device objects and regions online. */ + if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { + device_printf(dev, "Could not initialize ACPI objects: %s\n", + AcpiFormatException(status)); + goto out; + } + + /* + * Setup our sysctl tree. + * + * XXX: This doesn't check to make sure that none of these fail. + */ + sysctl_ctx_init(&sc->acpi_sysctl_ctx); + sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, + SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, + device_get_name(dev), CTLFLAG_RD, 0, ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, + 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, + &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, + &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, + &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, + &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, + &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); + SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, + "sleep delay in seconds"); + SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); + SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); + SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "disable_on_reboot", CTLFLAG_RW, + &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); + SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), + OID_AUTO, "handle_reboot", CTLFLAG_RW, + &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); + + /* + * Default to 1 second before sleeping to give some machines time to + * stabilize. + */ + sc->acpi_sleep_delay = 1; + if (bootverbose) + sc->acpi_verbose = 1; + if ((env = getenv("hw.acpi.verbose")) != NULL) { + if (strcmp(env, "0") != 0) + sc->acpi_verbose = 1; + freeenv(env); + } + + /* Only enable reboot by default if the FADT says it is available. */ + if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) + sc->acpi_handle_reboot = 1; + + /* Only enable S4BIOS by default if the FACS says it is available. */ + if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) + sc->acpi_s4bios = 1; + + /* Probe all supported sleep states. */ + acpi_sleep_states[ACPI_STATE_S0] = TRUE; + for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) + if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) + acpi_sleep_states[state] = TRUE; + + /* + * Dispatch the default sleep state to devices. The lid switch is set + * to UNKNOWN by default to avoid surprising users. + */ + sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? + ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; + sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; + sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? + ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; + sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? + ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; + + /* Pick the first valid sleep state for the sleep button default. */ + sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; + for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) + if (acpi_sleep_states[state]) { + sc->acpi_sleep_button_sx = state; + break; + } + + acpi_enable_fixed_events(sc); + + /* + * Scan the namespace and attach/initialise children. + */ + + /* Register our shutdown handler. */ + EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, + SHUTDOWN_PRI_LAST); + + /* + * Register our acpi event handlers. + * XXX should be configurable eg. via userland policy manager. + */ + EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, + sc, ACPI_EVENT_PRI_LAST); + EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, + sc, ACPI_EVENT_PRI_LAST); + + /* Flag our initial states. */ + sc->acpi_enabled = TRUE; + sc->acpi_sstate = ACPI_STATE_S0; + sc->acpi_sleep_disabled = TRUE; + + /* Create the control device */ + sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, + "acpi"); + sc->acpi_dev_t->si_drv1 = sc; + + if ((error = acpi_machdep_init(dev))) + goto out; + + /* Register ACPI again to pass the correct argument of pm_func. */ + power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); + + if (!acpi_disabled("bus")) + acpi_probe_children(dev); + + /* Update all GPEs and enable runtime GPEs. */ + status = AcpiUpdateAllGpes(); + if (ACPI_FAILURE(status)) + device_printf(dev, "Could not update all GPEs: %s\n", + AcpiFormatException(status)); + + /* Allow sleep request after a while. */ + timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); + + error = 0; + + out: + return_VALUE (error); +} + +static void +acpi_set_power_children(device_t dev, int state) +{ + device_t child, parent; + device_t *devlist; + struct pci_devinfo *dinfo; + int dstate, i, numdevs; + + if (device_get_children(dev, &devlist, &numdevs) != 0) + return; + + /* + * Retrieve and set D-state for the sleep state if _SxD is present. + * Skip children who aren't attached since they are handled separately. + */ + parent = device_get_parent(dev); + for (i = 0; i < numdevs; i++) { + child = devlist[i]; + dinfo = device_get_ivars(child); + dstate = state; + if (device_is_attached(child) && + acpi_device_pwr_for_sleep(parent, dev, &dstate) == 0) + acpi_set_powerstate(child, dstate); + } + free(devlist, M_TEMP); +} + +static int +acpi_suspend(device_t dev) +{ + int error; + + GIANT_REQUIRED; + + error = bus_generic_suspend(dev); + if (error == 0) + acpi_set_power_children(dev, ACPI_STATE_D3); + + return (error); +} + +static int +acpi_resume(device_t dev) +{ + + GIANT_REQUIRED; + + acpi_set_power_children(dev, ACPI_STATE_D0); + + return (bus_generic_resume(dev)); +} + +static int +acpi_shutdown(device_t dev) +{ + + GIANT_REQUIRED; + + /* Allow children to shutdown first. */ + bus_generic_shutdown(dev); + + /* + * Enable any GPEs that are able to power-on the system (i.e., RTC). + * Also, disable any that are not valid for this state (most). + */ + acpi_wake_prep_walk(ACPI_STATE_S5); + + return (0); +} + +/* + * Handle a new device being added + */ +static device_t +acpi_add_child(device_t bus, u_int order, const char *name, int unit) +{ + struct acpi_device *ad; + device_t child; + + if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) + return (NULL); + + resource_list_init(&ad->ad_rl); + + child = device_add_child_ordered(bus, order, name, unit); + if (child != NULL) + device_set_ivars(child, ad); + else + free(ad, M_ACPIDEV); + return (child); +} + +static int +acpi_print_child(device_t bus, device_t child) +{ + struct acpi_device *adev = device_get_ivars(child); + struct resource_list *rl = &adev->ad_rl; + int retval = 0; + + retval += bus_print_child_header(bus, child); + retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); + retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); + retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); + retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); + if (device_get_flags(child)) + retval += printf(" flags %#x", device_get_flags(child)); + retval += bus_print_child_footer(bus, child); + + return (retval); +} + +/* + * If this device is an ACPI child but no one claimed it, attempt + * to power it off. We'll power it back up when a driver is added. + * + * XXX Disabled for now since many necessary devices (like fdc and + * ATA) don't claim the devices we created for them but still expect + * them to be powered up. + */ +static void +acpi_probe_nomatch(device_t bus, device_t child) +{ +#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER + acpi_set_powerstate(child, ACPI_STATE_D3); +#endif +} + +/* + * If a new driver has a chance to probe a child, first power it up. + * + * XXX Disabled for now (see acpi_probe_nomatch for details). + */ +static void +acpi_driver_added(device_t dev, driver_t *driver) +{ + device_t child, *devlist; + int i, numdevs; + + DEVICE_IDENTIFY(driver, dev); + if (device_get_children(dev, &devlist, &numdevs)) + return; + for (i = 0; i < numdevs; i++) { + child = devlist[i]; + if (device_get_state(child) == DS_NOTPRESENT) { +#ifdef ACPI_ENABLE_POWERDOWN_NODRIVER + acpi_set_powerstate(child, ACPI_STATE_D0); + if (device_probe_and_attach(child) != 0) + acpi_set_powerstate(child, ACPI_STATE_D3); +#else + device_probe_and_attach(child); +#endif + } + } + free(devlist, M_TEMP); +} + +/* Location hint for devctl(8) */ +static int +acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, + size_t buflen) +{ + struct acpi_device *dinfo = device_get_ivars(child); + + 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) +{ + struct acpi_device *dinfo = device_get_ivars(child); + ACPI_DEVICE_INFO *adinfo; + + if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { + snprintf(buf, buflen, "unknown"); + return (0); + } + + snprintf(buf, buflen, "_HID=%s _UID=%lu", + (adinfo->Valid & ACPI_VALID_HID) ? + adinfo->HardwareId.String : "none", + (adinfo->Valid & ACPI_VALID_UID) ? + strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL); + AcpiOsFree(adinfo); + + return (0); +} + +/* + * Handle per-device ivars + */ +static int +acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) +{ + struct acpi_device *ad; + + if ((ad = device_get_ivars(child)) == NULL) { + device_printf(child, "device has no ivars\n"); + return (ENOENT); + } + + /* ACPI and ISA compatibility ivars */ + switch(index) { + case ACPI_IVAR_HANDLE: + *(ACPI_HANDLE *)result = ad->ad_handle; + break; + case ACPI_IVAR_PRIVATE: + *(void **)result = ad->ad_private; + break; + case ACPI_IVAR_FLAGS: + *(int *)result = ad->ad_flags; + break; + case ISA_IVAR_VENDORID: + case ISA_IVAR_SERIAL: + case ISA_IVAR_COMPATID: + *(int *)result = -1; + break; + case ISA_IVAR_LOGICALID: + *(int *)result = acpi_isa_get_logicalid(child); + break; + default: + return (ENOENT); + } + + return (0); +} + +static int +acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) +{ + struct acpi_device *ad; + + if ((ad = device_get_ivars(child)) == NULL) { + device_printf(child, "device has no ivars\n"); + return (ENOENT); + } + + switch(index) { + case ACPI_IVAR_HANDLE: + ad->ad_handle = (ACPI_HANDLE)value; + break; + case ACPI_IVAR_PRIVATE: + ad->ad_private = (void *)value; + break; + case ACPI_IVAR_FLAGS: + ad->ad_flags = (int)value; + break; + default: + panic("bad ivar write request (%d)", index); + return (ENOENT); + } + + return (0); +} + +/* + * Handle child resource allocation/removal + */ +static struct resource_list * +acpi_get_rlist(device_t dev, device_t child) +{ + struct acpi_device *ad; + + ad = device_get_ivars(child); + return (&ad->ad_rl); +} + +static int +acpi_match_resource_hint(device_t dev, int type, long value) +{ + struct acpi_device *ad = device_get_ivars(dev); + struct resource_list *rl = &ad->ad_rl; + struct resource_list_entry *rle; + + STAILQ_FOREACH(rle, rl, link) { + if (rle->type != type) + continue; + if (rle->start <= value && rle->end >= value) + return (1); + } + return (0); +} + +/* + * Wire device unit numbers based on resource matches in hints. + */ +static void +acpi_hint_device_unit(device_t acdev, device_t child, const char *name, + int *unitp) +{ + const char *s; + long value; + int line, matches, unit; + + /* + * Iterate over all the hints for the devices with the specified + * name to see if one's resources are a subset of this device. + */ + line = 0; + for (;;) { + if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) + break; + + /* Must have an "at" for acpi or isa. */ + resource_string_value(name, unit, "at", &s); + if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || + strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) + continue; + + /* + * Check for matching resources. We must have at least one match. + * Since I/O and memory resources cannot be shared, if we get a + * match on either of those, ignore any mismatches in IRQs or DRQs. + * + * XXX: We may want to revisit this to be more lenient and wire + * as long as it gets one match. + */ + matches = 0; + if (resource_long_value(name, unit, "port", &value) == 0) { + /* + * Floppy drive controllers are notorious for having a + * wide variety of resources not all of which include the + * first port that is specified by the hint (typically + * 0x3f0) (see the comment above fdc_isa_alloc_resources() + * in fdc_isa.c). However, they do all seem to include + * port + 2 (e.g. 0x3f2) so for a floppy device, look for + * 'value + 2' in the port resources instead of the hint + * value. + */ + if (strcmp(name, "fdc") == 0) + value += 2; + if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) + matches++; + else + continue; + } + if (resource_long_value(name, unit, "maddr", &value) == 0) { + if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) + matches++; + else + continue; + } + if (matches > 0) + goto matched; + if (resource_long_value(name, unit, "irq", &value) == 0) { + if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) + matches++; + else + continue; + } + if (resource_long_value(name, unit, "drq", &value) == 0) { + if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) + matches++; + else + continue; + } + + matched: + if (matches > 0) { + /* We have a winner! */ + *unitp = unit; + break; + } + } +} + +/* + * Pre-allocate/manage all memory and IO resources. Since rman can't handle + * duplicates, we merge any in the sysresource attach routine. + */ +static int +acpi_sysres_alloc(device_t dev) +{ + struct resource *res; + struct resource_list *rl; + struct resource_list_entry *rle; + struct rman *rm; + char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; + device_t *children; + int child_count, i; + + /* + * Probe/attach any sysresource devices. This would be unnecessary if we + * had multi-pass probe/attach. + */ + if (device_get_children(dev, &children, &child_count) != 0) + return (ENXIO); + for (i = 0; i < child_count; i++) { + if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) + device_probe_and_attach(children[i]); + } + free(children, M_TEMP); + + rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); + STAILQ_FOREACH(rle, rl, link) { + if (rle->res != NULL) { + device_printf(dev, "duplicate resource for %lx\n", rle->start); + continue; + } + + /* Only memory and IO resources are valid here. */ + switch (rle->type) { + case SYS_RES_IOPORT: + rm = &acpi_rman_io; + break; + case SYS_RES_MEMORY: + rm = &acpi_rman_mem; + break; + default: + continue; + } + + /* Pre-allocate resource and add to our rman pool. */ + res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, + &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); + if (res != NULL) { + rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); + rle->res = res; + } else + device_printf(dev, "reservation of %lx, %lx (%d) failed\n", + rle->start, rle->count, rle->type); + } + return (0); +} + +static char *pcilink_ids[] = { "PNP0C0F", NULL }; +static char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; + +/* + * Reserve declared resources for devices found during attach once system + * resources have been allocated. + */ +static void +acpi_reserve_resources(device_t dev) +{ + struct resource_list_entry *rle; + struct resource_list *rl; + struct acpi_device *ad; + struct acpi_softc *sc; + device_t *children; + int child_count, i; + + sc = device_get_softc(dev); + if (device_get_children(dev, &children, &child_count) != 0) + return; + for (i = 0; i < child_count; i++) { + ad = device_get_ivars(children[i]); + rl = &ad->ad_rl; + + /* Don't reserve system resources. */ + if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) + continue; + + STAILQ_FOREACH(rle, rl, link) { + /* + * Don't reserve IRQ resources. There are many sticky things + * to get right otherwise (e.g. IRQs for psm, atkbd, and HPET + * when using legacy routing). + */ + if (rle->type == SYS_RES_IRQ) + continue; + + /* + * Don't reserve the resource if it is already allocated. + * The acpi_ec(4) driver can allocate its resources early + * if ECDT is present. + */ + if (rle->res != NULL) + continue; + + /* + * Try to reserve the resource from our parent. If this + * fails because the resource is a system resource, just + * let it be. The resource range is already reserved so + * that other devices will not use it. If the driver + * needs to allocate the resource, then + * acpi_alloc_resource() will sub-alloc from the system + * resource. + */ + resource_list_reserve(rl, dev, children[i], rle->type, &rle->rid, + rle->start, rle->end, rle->count, 0); + } + } + free(children, M_TEMP); + sc->acpi_resources_reserved = 1; +} + +static int +acpi_set_resource(device_t dev, device_t child, int type, int rid, + u_long start, u_long count) +{ + struct acpi_softc *sc = device_get_softc(dev); + struct acpi_device *ad = device_get_ivars(child); + struct resource_list *rl = &ad->ad_rl; + u_long end; + + /* Ignore IRQ resources for PCI link devices. */ + if (type == SYS_RES_IRQ && ACPI_ID_PROBE(dev, child, pcilink_ids) != NULL) + return (0); + + /* If the resource is already allocated, fail. */ + if (resource_list_busy(rl, type, rid)) + return (EBUSY); + + /* If the resource is already reserved, release it. */ + if (resource_list_reserved(rl, type, rid)) + resource_list_unreserve(rl, dev, child, type, rid); + + /* Add the resource. */ + end = (start + count - 1); + resource_list_add(rl, type, rid, start, end, count); + + /* Don't reserve resources until the system resources are allocated. */ + if (!sc->acpi_resources_reserved) + return (0); + + /* Don't reserve system resources. */ + if (ACPI_ID_PROBE(dev, child, sysres_ids) != NULL) + return (0); + + /* + * Don't reserve IRQ resources. There are many sticky things to + * get right otherwise (e.g. IRQs for psm, atkbd, and HPET when + * using legacy routing). + */ + if (type == SYS_RES_IRQ) + return (0); + + /* + * Reserve the resource. + * + * XXX: Ignores failure for now. Failure here is probably a + * BIOS/firmware bug? + */ + resource_list_reserve(rl, dev, child, type, &rid, start, end, count, 0); + return (0); +} + +static struct resource * +acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, + u_long start, u_long end, u_long count, u_int flags) +{ + ACPI_RESOURCE ares; + struct acpi_device *ad; + struct resource_list_entry *rle; + struct resource_list *rl; + struct resource *res; + int isdefault = (start == 0UL && end == ~0UL); + + /* + * First attempt at allocating the resource. For direct children, + * use resource_list_alloc() to handle reserved resources. For + * other devices, pass the request up to our parent. + */ + if (bus == device_get_parent(child)) { + ad = device_get_ivars(child); + rl = &ad->ad_rl; + + /* + * Simulate the behavior of the ISA bus for direct children + * devices. That is, if a non-default range is specified for + * a resource that doesn't exist, use bus_set_resource() to + * add the resource before allocating it. Note that these + * resources will not be reserved. + */ + if (!isdefault && resource_list_find(rl, type, *rid) == NULL) + resource_list_add(rl, type, *rid, start, end, count); + res = resource_list_alloc(rl, bus, child, type, rid, start, end, count, + flags); + if (res != NULL && type == SYS_RES_IRQ) { + /* + * Since bus_config_intr() takes immediate effect, we cannot + * configure the interrupt associated with a device when we + * parse the resources but have to defer it until a driver + * actually allocates the interrupt via bus_alloc_resource(). + * + * XXX: Should we handle the lookup failing? + */ + if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) + acpi_config_intr(child, &ares); + } + + /* + * If this is an allocation of the "default" range for a given + * RID, fetch the exact bounds for this resource from the + * resource list entry to try to allocate the range from the + * system resource regions. + */ + if (res == NULL && isdefault) { + rle = resource_list_find(rl, type, *rid); + if (rle != NULL) { + start = rle->start; + end = rle->end; + count = rle->count; + } + } + } else + res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, + start, end, count, flags); + + /* + * If the first attempt failed and this is an allocation of a + * specific range, try to satisfy the request via a suballocation + * from our system resource regions. + */ + if (res == NULL && start + count - 1 == end) + res = acpi_alloc_sysres(child, type, rid, start, end, count, flags); + return (res); +} + +/* + * Attempt to allocate a specific resource range from the system + * resource ranges. Note that we only handle memory and I/O port + * system resources. + */ +struct resource * +acpi_alloc_sysres(device_t child, int type, int *rid, u_long start, u_long end, + u_long count, u_int flags) +{ + struct rman *rm; + struct resource *res; + + switch (type) { + case SYS_RES_IOPORT: + rm = &acpi_rman_io; + break; + case SYS_RES_MEMORY: + rm = &acpi_rman_mem; + break; + default: + return (NULL); + } + + KASSERT(start + count - 1 == end, ("wildcard resource range")); + res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, + child); + if (res == NULL) + return (NULL); + + rman_set_rid(res, *rid); + + /* If requested, activate the resource using the parent's method. */ + if (flags & RF_ACTIVE) + if (bus_activate_resource(child, type, *rid, res) != 0) { + rman_release_resource(res); + return (NULL); + } + + return (res); +} + +static int +acpi_is_resource_managed(int type, struct resource *r) +{ + + /* We only handle memory and IO resources through rman. */ + switch (type) { + case SYS_RES_IOPORT: + return (rman_is_region_manager(r, &acpi_rman_io)); + case SYS_RES_MEMORY: + return (rman_is_region_manager(r, &acpi_rman_mem)); + } + return (0); +} + +static int +acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r, + u_long start, u_long end) +{ + + if (acpi_is_resource_managed(type, r)) + return (rman_adjust_resource(r, start, end)); + return (bus_generic_adjust_resource(bus, child, type, r, start, end)); +} + +static int +acpi_release_resource(device_t bus, device_t child, int type, int rid, + struct resource *r) +{ + int ret; + + /* + * If this resource belongs to one of our internal managers, + * deactivate it and release it to the local pool. + */ + if (acpi_is_resource_managed(type, r)) { + if (rman_get_flags(r) & RF_ACTIVE) { + ret = bus_deactivate_resource(child, type, rid, r); + if (ret != 0) + return (ret); + } + return (rman_release_resource(r)); + } + + return (bus_generic_rl_release_resource(bus, child, type, rid, r)); +} + +static void +acpi_delete_resource(device_t bus, device_t child, int type, int rid) +{ + struct resource_list *rl; + + rl = acpi_get_rlist(bus, child); + if (resource_list_busy(rl, type, rid)) { + device_printf(bus, "delete_resource: Resource still owned by child" + " (type=%d, rid=%d)\n", type, rid); + return; + } + resource_list_unreserve(rl, bus, child, type, rid); + resource_list_delete(rl, type, rid); +} + +/* Allocate an IO port or memory resource, given its GAS. */ +int +acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, + struct resource **res, u_int flags) +{ + int error, res_type; + + error = ENOMEM; + if (type == NULL || rid == NULL || gas == NULL || res == NULL) + return (EINVAL); + + /* We only support memory and IO spaces. */ + switch (gas->SpaceId) { + case ACPI_ADR_SPACE_SYSTEM_MEMORY: + res_type = SYS_RES_MEMORY; + break; + case ACPI_ADR_SPACE_SYSTEM_IO: + res_type = SYS_RES_IOPORT; + break; + default: + return (EOPNOTSUPP); + } + + /* + * If the register width is less than 8, assume the BIOS author means + * it is a bit field and just allocate a byte. + */ + if (gas->BitWidth && gas->BitWidth < 8) + gas->BitWidth = 8; + + /* Validate the address after we're sure we support the space. */ + if (gas->Address == 0 || gas->BitWidth == 0) + return (EINVAL); + + bus_set_resource(dev, res_type, *rid, gas->Address, + gas->BitWidth / 8); + *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); + if (*res != NULL) { + *type = res_type; + error = 0; + } else + bus_delete_resource(dev, res_type, *rid); + + return (error); +} + +/* Probe _HID and _CID for compatible ISA PNP ids. */ +static uint32_t +acpi_isa_get_logicalid(device_t dev) +{ + ACPI_DEVICE_INFO *devinfo; + ACPI_HANDLE h; + uint32_t pnpid; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + /* Fetch and validate the HID. */ + if ((h = acpi_get_handle(dev)) == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return_VALUE (0); + + pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 && + devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ? + PNP_EISAID(devinfo->HardwareId.String) : 0; + AcpiOsFree(devinfo); + + return_VALUE (pnpid); +} + +static int +acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) +{ + ACPI_DEVICE_INFO *devinfo; + ACPI_DEVICE_ID *ids; + ACPI_HANDLE h; + uint32_t *pnpid; + int i, valid; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + pnpid = cids; + + /* Fetch and validate the CID */ + if ((h = acpi_get_handle(dev)) == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return_VALUE (0); + + if ((devinfo->Valid & ACPI_VALID_CID) == 0) { + AcpiOsFree(devinfo); + return_VALUE (0); + } + + if (devinfo->CompatibleIdList.Count < count) + count = devinfo->CompatibleIdList.Count; + ids = devinfo->CompatibleIdList.Ids; + for (i = 0, valid = 0; i < count; i++) + if (ids[i].Length >= ACPI_EISAID_STRING_SIZE && + strncmp(ids[i].String, "PNP", 3) == 0) { + *pnpid++ = PNP_EISAID(ids[i].String); + valid++; + } + AcpiOsFree(devinfo); + + return_VALUE (valid); +} + +static char * +acpi_device_id_probe(device_t bus, device_t dev, char **ids) +{ + ACPI_HANDLE h; + ACPI_OBJECT_TYPE t; + int i; + + h = acpi_get_handle(dev); + if (ids == NULL || h == NULL) + return (NULL); + t = acpi_get_type(dev); + if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR) + return (NULL); + + /* Try to match one of the array of IDs with a HID or CID. */ + for (i = 0; ids[i] != NULL; i++) { + if (acpi_MatchHid(h, ids[i])) + return (ids[i]); + } + return (NULL); +} + +static ACPI_STATUS +acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, + ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) +{ + ACPI_HANDLE h; + + if (dev == NULL) + h = ACPI_ROOT_OBJECT; + else if ((h = acpi_get_handle(dev)) == NULL) + return (AE_BAD_PARAMETER); + return (AcpiEvaluateObject(h, pathname, parameters, ret)); +} + +int +acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) +{ + struct acpi_softc *sc; + ACPI_HANDLE handle; + ACPI_STATUS status; + char sxd[8]; + + handle = acpi_get_handle(dev); + + /* + * XXX If we find these devices, don't try to power them down. + * The serial and IRDA ports on my T23 hang the system when + * set to D3 and it appears that such legacy devices may + * need special handling in their drivers. + */ + if (dstate == NULL || handle == NULL || + acpi_MatchHid(handle, "PNP0500") || + acpi_MatchHid(handle, "PNP0501") || + acpi_MatchHid(handle, "PNP0502") || + acpi_MatchHid(handle, "PNP0510") || + acpi_MatchHid(handle, "PNP0511")) + return (ENXIO); + + /* + * Override next state with the value from _SxD, if present. + * Note illegal _S0D is evaluated because some systems expect this. + */ + sc = device_get_softc(bus); + snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); + status = acpi_GetInteger(handle, sxd, dstate); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + device_printf(dev, "failed to get %s on %s: %s\n", sxd, + acpi_name(handle), AcpiFormatException(status)); + return (ENXIO); + } + + return (0); +} + +/* Callback arg for our implementation of walking the namespace. */ +struct acpi_device_scan_ctx { + acpi_scan_cb_t user_fn; + void *arg; + ACPI_HANDLE parent; +}; + +static ACPI_STATUS +acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) +{ + struct acpi_device_scan_ctx *ctx; + device_t dev, old_dev; + ACPI_STATUS status; + ACPI_OBJECT_TYPE type; + + /* + * Skip this device if we think we'll have trouble with it or it is + * the parent where the scan began. + */ + ctx = (struct acpi_device_scan_ctx *)arg; + if (acpi_avoid(h) || h == ctx->parent) + return (AE_OK); + + /* If this is not a valid device type (e.g., a method), skip it. */ + if (ACPI_FAILURE(AcpiGetType(h, &type))) + return (AE_OK); + if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && + type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) + return (AE_OK); + + /* + * Call the user function with the current device. If it is unchanged + * afterwards, return. Otherwise, we update the handle to the new dev. + */ + old_dev = acpi_get_device(h); + dev = old_dev; + status = ctx->user_fn(h, &dev, level, ctx->arg); + if (ACPI_FAILURE(status) || old_dev == dev) + return (status); + + /* Remove the old child and its connection to the handle. */ + if (old_dev != NULL) { + device_delete_child(device_get_parent(old_dev), old_dev); + AcpiDetachData(h, acpi_fake_objhandler); + } + + /* Recreate the handle association if the user created a device. */ + if (dev != NULL) + AcpiAttachData(h, acpi_fake_objhandler, dev); + + return (AE_OK); +} + +static ACPI_STATUS +acpi_device_scan_children(device_t bus, device_t dev, int max_depth, + acpi_scan_cb_t user_fn, void *arg) +{ + ACPI_HANDLE h; + struct acpi_device_scan_ctx ctx; + + if (acpi_disabled("children")) + return (AE_OK); + + if (dev == NULL) + h = ACPI_ROOT_OBJECT; + else if ((h = acpi_get_handle(dev)) == NULL) + return (AE_BAD_PARAMETER); + ctx.user_fn = user_fn; + ctx.arg = arg; + ctx.parent = h; + return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, + acpi_device_scan_cb, NULL, &ctx, NULL)); +} + +/* + * Even though ACPI devices are not PCI, we use the PCI approach for setting + * device power states since it's close enough to ACPI. + */ +static int +acpi_set_powerstate(device_t child, int state) +{ + ACPI_HANDLE h; + ACPI_STATUS status; + + h = acpi_get_handle(child); + if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) + return (EINVAL); + if (h == NULL) + return (0); + + /* Ignore errors if the power methods aren't present. */ + status = acpi_pwr_switch_consumer(h, state); + if (ACPI_SUCCESS(status)) { + if (bootverbose) + device_printf(child, "set ACPI power state D%d on %s\n", + state, acpi_name(h)); + } else if (status != AE_NOT_FOUND) + device_printf(child, + "failed to set ACPI power state D%d on %s: %s\n", state, + acpi_name(h), AcpiFormatException(status)); + + return (0); +} + +static int +acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) +{ + int result, cid_count, i; + uint32_t lid, cids[8]; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + /* + * ISA-style drivers attached to ACPI may persist and + * probe manually if we return ENOENT. We never want + * that to happen, so don't ever return it. + */ + result = ENXIO; + + /* Scan the supplied IDs for a match */ + lid = acpi_isa_get_logicalid(child); + cid_count = acpi_isa_get_compatid(child, cids, 8); + while (ids && ids->ip_id) { + if (lid == ids->ip_id) { + result = 0; + goto out; + } + for (i = 0; i < cid_count; i++) { + if (cids[i] == ids->ip_id) { + result = 0; + goto out; + } + } + ids++; + } + + out: + if (result == 0 && ids->ip_desc) + device_set_desc(child, ids->ip_desc); + + return_VALUE (result); +} + +#if defined(__i386__) || defined(__amd64__) +/* + * Look for a MCFG table. If it is present, use the settings for + * domain (segment) 0 to setup PCI config space access via the memory + * map. + */ +static void +acpi_enable_pcie(void) +{ + ACPI_TABLE_HEADER *hdr; + ACPI_MCFG_ALLOCATION *alloc, *end; + ACPI_STATUS status; + + status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); + if (ACPI_FAILURE(status)) + return; + + end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); + alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); + while (alloc < end) { + if (alloc->PciSegment == 0) { + pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, + alloc->EndBusNumber); + return; + } + alloc++; + } +} +#endif + +/* + * Scan all of the ACPI namespace and attach child devices. + * + * We should only expect to find devices in the \_PR, \_TZ, \_SI, and + * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. + * However, in violation of the spec, some systems place their PCI link + * devices in \, so we have to walk the whole namespace. We check the + * type of namespace nodes, so this should be ok. + */ +static void +acpi_probe_children(device_t bus) +{ + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + /* + * Scan the namespace and insert placeholders for all the devices that + * we find. We also probe/attach any early devices. + * + * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because + * we want to create nodes for all devices, not just those that are + * currently present. (This assumes that we don't want to create/remove + * devices as they appear, which might be smarter.) + */ + ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); + AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, + NULL, bus, NULL); + + /* Pre-allocate resources for our rman from any sysresource devices. */ + acpi_sysres_alloc(bus); + + /* Reserve resources already allocated to children. */ + acpi_reserve_resources(bus); + + /* Create any static children by calling device identify methods. */ + ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); + bus_generic_probe(bus); + + /* Probe/attach all children, created statically and from the namespace. */ + ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n")); + bus_generic_attach(bus); + + /* Attach wake sysctls. */ + acpi_wake_sysctl_walk(bus); + + ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); + return_VOID; +} + +/* + * Determine the probe order for a given device. + */ +static void +acpi_probe_order(ACPI_HANDLE handle, int *order) +{ + ACPI_OBJECT_TYPE type; + + /* + * 0. CPUs + * 1. I/O port and memory system resource holders + * 2. Clocks and timers (to handle early accesses) + * 3. Embedded controllers (to handle early accesses) + * 4. PCI Link Devices + */ + AcpiGetType(handle, &type); + if (type == ACPI_TYPE_PROCESSOR) + *order = 0; + else if (acpi_MatchHid(handle, "PNP0C01") || + acpi_MatchHid(handle, "PNP0C02")) + *order = 1; + else if (acpi_MatchHid(handle, "PNP0100") || + acpi_MatchHid(handle, "PNP0103") || + acpi_MatchHid(handle, "PNP0B00")) + *order = 2; + else if (acpi_MatchHid(handle, "PNP0C09")) + *order = 3; + else if (acpi_MatchHid(handle, "PNP0C0F")) + *order = 4; +} + +/* + * Evaluate a child device and determine whether we might attach a device to + * it. + */ +static ACPI_STATUS +acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) +{ + struct acpi_prw_data prw; + ACPI_OBJECT_TYPE type; + ACPI_HANDLE h; + device_t bus, child; + char *handle_str; + int order; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (acpi_disabled("children")) + return_ACPI_STATUS (AE_OK); + + /* Skip this device if we think we'll have trouble with it. */ + if (acpi_avoid(handle)) + return_ACPI_STATUS (AE_OK); + + bus = (device_t)context; + if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { + handle_str = acpi_name(handle); + switch (type) { + case ACPI_TYPE_DEVICE: + /* + * Since we scan from \, be sure to skip system scope objects. + * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around + * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run + * during the intialization and \_TZ_ is to support Notify() on it. + */ + if (strcmp(handle_str, "\\_SB_") == 0 || + strcmp(handle_str, "\\_TZ_") == 0) + break; + if (acpi_parse_prw(handle, &prw) == 0) + AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); + + /* + * Ignore devices that do not have a _HID or _CID. They should + * be discovered by other buses (e.g. the PCI bus driver). + */ + if (!acpi_has_hid(handle)) + break; + /* FALLTHROUGH */ + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + case ACPI_TYPE_POWER: + /* + * Create a placeholder device for this node. Sort the + * placeholder so that the probe/attach passes will run + * breadth-first. Orders less than ACPI_DEV_BASE_ORDER + * are reserved for special objects (i.e., system + * resources). + */ + ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); + order = level * 10 + ACPI_DEV_BASE_ORDER; + acpi_probe_order(handle, &order); + child = BUS_ADD_CHILD(bus, order, NULL, -1); + if (child == NULL) + break; + + /* Associate the handle with the device_t and vice versa. */ + acpi_set_handle(child, handle); + AcpiAttachData(handle, acpi_fake_objhandler, child); + + /* + * Check that the device is present. If it's not present, + * leave it disabled (so that we have a device_t attached to + * the handle, but we don't probe it). + * + * XXX PCI link devices sometimes report "present" but not + * "functional" (i.e. if disabled). Go ahead and probe them + * anyway since we may enable them later. + */ + if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { + /* Never disable PCI link devices. */ + if (acpi_MatchHid(handle, "PNP0C0F")) + break; + /* + * Docking stations should remain enabled since the system + * may be undocked at boot. + */ + if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) + break; + + device_disable(child); + break; + } + + /* + * Get the device's resource settings and attach them. + * Note that if the device has _PRS but no _CRS, we need + * to decide when it's appropriate to try to configure the + * device. Ignore the return value here; it's OK for the + * device not to have any resources. + */ + acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); + break; + } + } + + return_ACPI_STATUS (AE_OK); +} + +/* + * AcpiAttachData() requires an object handler but never uses it. This is a + * placeholder object handler so we can store a device_t in an ACPI_HANDLE. + */ +void +acpi_fake_objhandler(ACPI_HANDLE h, void *data) +{ +} + +static void +acpi_shutdown_final(void *arg, int howto) +{ + struct acpi_softc *sc = (struct acpi_softc *)arg; + ACPI_STATUS status; + + /* + * XXX Shutdown code should only run on the BSP (cpuid 0). + * Some chipsets do not power off the system correctly if called from + * an AP. + */ + if ((howto & RB_POWEROFF) != 0) { + status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); + if (ACPI_FAILURE(status)) { + device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", + AcpiFormatException(status)); + return; + } + device_printf(sc->acpi_dev, "Powering system off\n"); + ACPI_DISABLE_IRQS(); + status = AcpiEnterSleepState(ACPI_STATE_S5); + if (ACPI_FAILURE(status)) + device_printf(sc->acpi_dev, "power-off failed - %s\n", + AcpiFormatException(status)); + else { + DELAY(1000000); + device_printf(sc->acpi_dev, "power-off failed - timeout\n"); + } + } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { + /* Reboot using the reset register. */ + status = AcpiReset(); + if (ACPI_SUCCESS(status)) { + DELAY(1000000); + device_printf(sc->acpi_dev, "reset failed - timeout\n"); + } else if (status != AE_NOT_EXIST) + device_printf(sc->acpi_dev, "reset failed - %s\n", + AcpiFormatException(status)); + } else if (sc->acpi_do_disable && panicstr == NULL) { + /* + * Only disable ACPI if the user requested. On some systems, writing + * the disable value to SMI_CMD hangs the system. + */ + device_printf(sc->acpi_dev, "Shutting down\n"); + AcpiTerminate(); + } +} + +static void +acpi_enable_fixed_events(struct acpi_softc *sc) +{ + static int first_time = 1; + + /* Enable and clear fixed events and install handlers. */ + if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { + AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); + AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, + acpi_event_power_button_sleep, sc); + if (first_time) + device_printf(sc->acpi_dev, "Power Button (fixed)\n"); + } + if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { + AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); + AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, + acpi_event_sleep_button_sleep, sc); + if (first_time) + device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); + } + + first_time = 0; +} + +/* + * Returns true if the device is actually present and should + * be attached to. This requires the present, enabled, UI-visible + * and diagnostics-passed bits to be set. + */ +BOOLEAN +acpi_DeviceIsPresent(device_t dev) +{ + ACPI_DEVICE_INFO *devinfo; + ACPI_HANDLE h; + BOOLEAN present; + + if ((h = acpi_get_handle(dev)) == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return (FALSE); + + /* If no _STA method, must be present */ + present = (devinfo->Valid & ACPI_VALID_STA) == 0 || + ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; + + AcpiOsFree(devinfo); + return (present); +} + +/* + * Returns true if the battery is actually present and inserted. + */ +BOOLEAN +acpi_BatteryIsPresent(device_t dev) +{ + ACPI_DEVICE_INFO *devinfo; + ACPI_HANDLE h; + BOOLEAN present; + + if ((h = acpi_get_handle(dev)) == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return (FALSE); + + /* If no _STA method, must be present */ + present = (devinfo->Valid & ACPI_VALID_STA) == 0 || + ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE; + + AcpiOsFree(devinfo); + return (present); +} + +/* + * Returns true if a device has at least one valid device ID. + */ +static BOOLEAN +acpi_has_hid(ACPI_HANDLE h) +{ + ACPI_DEVICE_INFO *devinfo; + BOOLEAN ret; + + if (h == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return (FALSE); + + ret = FALSE; + if ((devinfo->Valid & ACPI_VALID_HID) != 0) + ret = TRUE; + else if ((devinfo->Valid & ACPI_VALID_CID) != 0) + if (devinfo->CompatibleIdList.Count > 0) + ret = TRUE; + + AcpiOsFree(devinfo); + return (ret); +} + +/* + * Match a HID string against a handle + */ +BOOLEAN +acpi_MatchHid(ACPI_HANDLE h, const char *hid) +{ + ACPI_DEVICE_INFO *devinfo; + BOOLEAN ret; + int i; + + if (hid == NULL || h == NULL || + ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) + return (FALSE); + + ret = FALSE; + if ((devinfo->Valid & ACPI_VALID_HID) != 0 && + strcmp(hid, devinfo->HardwareId.String) == 0) + ret = TRUE; + else if ((devinfo->Valid & ACPI_VALID_CID) != 0) + for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { + if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { + ret = TRUE; + break; + } + } + + AcpiOsFree(devinfo); + return (ret); +} + +/* + * Return the handle of a named object within our scope, ie. that of (parent) + * or one if its parents. + */ +ACPI_STATUS +acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) +{ + ACPI_HANDLE r; + ACPI_STATUS status; + + /* Walk back up the tree to the root */ + for (;;) { + status = AcpiGetHandle(parent, path, &r); + if (ACPI_SUCCESS(status)) { + *result = r; + return (AE_OK); + } + /* XXX Return error here? */ + if (status != AE_NOT_FOUND) + return (AE_OK); + if (ACPI_FAILURE(AcpiGetParent(parent, &r))) + return (AE_NOT_FOUND); + parent = r; + } +} + +/* + * Allocate a buffer with a preset data size. + */ +ACPI_BUFFER * +acpi_AllocBuffer(int size) +{ + ACPI_BUFFER *buf; + + if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) + return (NULL); + buf->Length = size; + buf->Pointer = (void *)(buf + 1); + return (buf); +} + +ACPI_STATUS +acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) +{ + ACPI_OBJECT arg1; + ACPI_OBJECT_LIST args; + + arg1.Type = ACPI_TYPE_INTEGER; + arg1.Integer.Value = number; + args.Count = 1; + args.Pointer = &arg1; + + return (AcpiEvaluateObject(handle, path, &args, NULL)); +} + +/* + * Evaluate a path that should return an integer. + */ +ACPI_STATUS +acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) +{ + ACPI_STATUS status; + ACPI_BUFFER buf; + ACPI_OBJECT param; + + if (handle == NULL) + handle = ACPI_ROOT_OBJECT; + + /* + * Assume that what we've been pointed at is an Integer object, or + * a method that will return an Integer. + */ + buf.Pointer = ¶m; + buf.Length = sizeof(param); + status = AcpiEvaluateObject(handle, path, NULL, &buf); + if (ACPI_SUCCESS(status)) { + if (param.Type == ACPI_TYPE_INTEGER) + *number = param.Integer.Value; + else + status = AE_TYPE; + } + + /* + * In some applications, a method that's expected to return an Integer + * may instead return a Buffer (probably to simplify some internal + * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, + * convert it into an Integer as best we can. + * + * This is a hack. + */ + if (status == AE_BUFFER_OVERFLOW) { + if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { + status = AE_NO_MEMORY; + } else { + status = AcpiEvaluateObject(handle, path, NULL, &buf); + if (ACPI_SUCCESS(status)) + status = acpi_ConvertBufferToInteger(&buf, number); + AcpiOsFree(buf.Pointer); + } + } + return (status); +} + +ACPI_STATUS +acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) +{ + ACPI_OBJECT *p; + UINT8 *val; + int i; + + p = (ACPI_OBJECT *)bufp->Pointer; + if (p->Type == ACPI_TYPE_INTEGER) { + *number = p->Integer.Value; + return (AE_OK); + } + if (p->Type != ACPI_TYPE_BUFFER) + return (AE_TYPE); + if (p->Buffer.Length > sizeof(int)) + return (AE_BAD_DATA); + + *number = 0; + val = p->Buffer.Pointer; + for (i = 0; i < p->Buffer.Length; i++) + *number += val[i] << (i * 8); + return (AE_OK); +} + +/* + * Iterate over the elements of an a package object, calling the supplied + * function for each element. + * + * XXX possible enhancement might be to abort traversal on error. + */ +ACPI_STATUS +acpi_ForeachPackageObject(ACPI_OBJECT *pkg, + void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) +{ + ACPI_OBJECT *comp; + int i; + + if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) + return (AE_BAD_PARAMETER); + + /* Iterate over components */ + i = 0; + comp = pkg->Package.Elements; + for (; i < pkg->Package.Count; i++, comp++) + func(comp, arg); + + return (AE_OK); +} + +/* + * Find the (index)th resource object in a set. + */ +ACPI_STATUS +acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) +{ + ACPI_RESOURCE *rp; + int i; + + rp = (ACPI_RESOURCE *)buf->Pointer; + i = index; + while (i-- > 0) { + /* Range check */ + if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) + return (AE_BAD_PARAMETER); + + /* Check for terminator */ + if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) + return (AE_NOT_FOUND); + rp = ACPI_NEXT_RESOURCE(rp); + } + if (resp != NULL) + *resp = rp; + + return (AE_OK); +} + +/* + * Append an ACPI_RESOURCE to an ACPI_BUFFER. + * + * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER + * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible + * backing block. If the ACPI_RESOURCE is NULL, return an empty set of + * resources. + */ +#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 + +ACPI_STATUS +acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) +{ + ACPI_RESOURCE *rp; + void *newp; + + /* Initialise the buffer if necessary. */ + if (buf->Pointer == NULL) { + buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; + if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) + return (AE_NO_MEMORY); + rp = (ACPI_RESOURCE *)buf->Pointer; + rp->Type = ACPI_RESOURCE_TYPE_END_TAG; + rp->Length = 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->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) + break; + rp = ACPI_NEXT_RESOURCE(rp); + } + + /* + * Check the size of the buffer and expand if required. + * + * Required size is: + * size of existing resources before terminator + + * size of new resource and header + + * size of terminator. + * + * Note that this loop should really only run once, unless + * for some reason we are stuffing a *really* huge resource. + */ + while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + + res->Length + ACPI_RS_SIZE_NO_DATA + + ACPI_RS_SIZE_MIN) >= buf->Length) { + if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) + return (AE_NO_MEMORY); + bcopy(buf->Pointer, newp, buf->Length); + rp = (ACPI_RESOURCE *)((u_int8_t *)newp + + ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); + AcpiOsFree(buf->Pointer); + buf->Pointer = newp; + buf->Length += buf->Length; + } + + /* Insert the new resource. */ + bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); + + /* And add the terminator. */ + rp = ACPI_NEXT_RESOURCE(rp); + rp->Type = ACPI_RESOURCE_TYPE_END_TAG; + rp->Length = 0; + + return (AE_OK); +} + +/* + * Set interrupt model. + */ +ACPI_STATUS +acpi_SetIntrModel(int model) +{ + + return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); +} + +/* + * Walk subtables of a table and call a callback routine for each + * subtable. The caller should provide the first subtable and a + * pointer to the end of the table. This can be used to walk tables + * such as MADT and SRAT that use subtable entries. + */ +void +acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler, + void *arg) +{ + ACPI_SUBTABLE_HEADER *entry; + + for (entry = first; (void *)entry < end; ) { + /* Avoid an infinite loop if we hit a bogus entry. */ + if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER)) + return; + + handler(entry, arg); + entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length); + } +} + +/* + * DEPRECATED. This interface has serious deficiencies and will be + * removed. + * + * Immediately enter the sleep state. In the old model, acpiconf(8) ran + * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. + */ +ACPI_STATUS +acpi_SetSleepState(struct acpi_softc *sc, int state) +{ + static int once; + + if (!once) { + device_printf(sc->acpi_dev, +"warning: acpi_SetSleepState() deprecated, need to update your software\n"); + once = 1; + } + return (acpi_EnterSleepState(sc, state)); +} + +#if defined(__amd64__) || defined(__i386__) +static void +acpi_sleep_force(void *arg) +{ + struct acpi_softc *sc = (struct acpi_softc *)arg; + + device_printf(sc->acpi_dev, + "suspend request timed out, forcing sleep now\n"); + if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) + device_printf(sc->acpi_dev, "force sleep state S%d failed\n", + sc->acpi_next_sstate); +} +#endif + +/* + * Request that the system enter the given suspend state. All /dev/apm + * devices and devd(8) will be notified. Userland then has a chance to + * save state and acknowledge the request. The system sleeps once all + * acks are in. + */ +int +acpi_ReqSleepState(struct acpi_softc *sc, int state) +{ +#if defined(__amd64__) || defined(__i386__) + struct apm_clone_data *clone; + ACPI_STATUS status; + + if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) + return (EINVAL); + if (!acpi_sleep_states[state]) + return (EOPNOTSUPP); + + ACPI_LOCK(acpi); + + /* If a suspend request is already in progress, just return. */ + if (sc->acpi_next_sstate != 0) { + ACPI_UNLOCK(acpi); + return (0); + } + + /* S5 (soft-off) should be entered directly with no waiting. */ + if (state == ACPI_STATE_S5) { + ACPI_UNLOCK(acpi); + status = acpi_EnterSleepState(sc, state); + return (ACPI_SUCCESS(status) ? 0 : ENXIO); + } + + /* Record the pending state and notify all apm devices. */ + sc->acpi_next_sstate = state; + STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { + clone->notify_status = APM_EV_NONE; + if ((clone->flags & ACPI_EVF_DEVD) == 0) { + selwakeuppri(&clone->sel_read, PZERO); + KNOTE_LOCKED(&clone->sel_read.si_note, 0); + } + } + + /* If devd(8) is not running, immediately enter the sleep state. */ + if (!devctl_process_running()) { + ACPI_UNLOCK(acpi); + status = acpi_EnterSleepState(sc, state); + return (ACPI_SUCCESS(status) ? 0 : ENXIO); + } + + /* + * Set a timeout to fire if userland doesn't ack the suspend request + * in time. This way we still eventually go to sleep if we were + * overheating or running low on battery, even if userland is hung. + * We cancel this timeout once all userland acks are in or the + * suspend request is aborted. + */ + callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); + ACPI_UNLOCK(acpi); + + /* Now notify devd(8) also. */ + acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); + + return (0); +#else + /* This platform does not support acpi suspend/resume. */ + return (EOPNOTSUPP); +#endif +} + +/* + * Acknowledge (or reject) a pending sleep state. The caller has + * prepared for suspend and is now ready for it to proceed. If the + * error argument is non-zero, it indicates suspend should be cancelled + * and gives an errno value describing why. Once all votes are in, + * we suspend the system. + */ +int +acpi_AckSleepState(struct apm_clone_data *clone, int error) +{ +#if defined(__amd64__) || defined(__i386__) + struct acpi_softc *sc; + int ret, sleeping; + + /* If no pending sleep state, return an error. */ + ACPI_LOCK(acpi); + sc = clone->acpi_sc; + if (sc->acpi_next_sstate == 0) { + ACPI_UNLOCK(acpi); + return (ENXIO); + } + + /* Caller wants to abort suspend process. */ + if (error) { + sc->acpi_next_sstate = 0; + callout_stop(&sc->susp_force_to); + device_printf(sc->acpi_dev, + "listener on %s cancelled the pending suspend\n", + devtoname(clone->cdev)); + ACPI_UNLOCK(acpi); + return (0); + } + + /* + * Mark this device as acking the suspend request. Then, walk through + * all devices, seeing if they agree yet. We only count devices that + * are writable since read-only devices couldn't ack the request. + */ + sleeping = TRUE; + clone->notify_status = APM_EV_ACKED; + STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { + if ((clone->flags & ACPI_EVF_WRITE) != 0 && + clone->notify_status != APM_EV_ACKED) { + sleeping = FALSE; + break; + } + } + + /* If all devices have voted "yes", we will suspend now. */ + if (sleeping) + callout_stop(&sc->susp_force_to); + ACPI_UNLOCK(acpi); + ret = 0; + if (sleeping) { + if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) + ret = ENODEV; + } + return (ret); +#else + /* This platform does not support acpi suspend/resume. */ + return (EOPNOTSUPP); +#endif +} + +static void +acpi_sleep_enable(void *arg) +{ + struct acpi_softc *sc = (struct acpi_softc *)arg; + + /* Reschedule if the system is not fully up and running. */ + if (!AcpiGbl_SystemAwakeAndRunning) { + timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); + return; + } + + ACPI_LOCK(acpi); + sc->acpi_sleep_disabled = FALSE; + ACPI_UNLOCK(acpi); +} + +static ACPI_STATUS +acpi_sleep_disable(struct acpi_softc *sc) +{ + ACPI_STATUS status; + + /* Fail if the system is not fully up and running. */ + if (!AcpiGbl_SystemAwakeAndRunning) + return (AE_ERROR); + + ACPI_LOCK(acpi); + status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; + sc->acpi_sleep_disabled = TRUE; + ACPI_UNLOCK(acpi); + + return (status); +} + +enum acpi_sleep_state { + ACPI_SS_NONE, + ACPI_SS_GPE_SET, + ACPI_SS_DEV_SUSPEND, + ACPI_SS_SLP_PREP, + ACPI_SS_SLEPT, +}; + +/* + * Enter the desired system sleep state. + * + * Currently we support S1-S5 but S4 is only S4BIOS + */ +static ACPI_STATUS +acpi_EnterSleepState(struct acpi_softc *sc, int state) +{ + ACPI_STATUS status; + enum acpi_sleep_state slp_state; + + ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); + + if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) + return_ACPI_STATUS (AE_BAD_PARAMETER); + if (!acpi_sleep_states[state]) { + device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", + state); + return (AE_SUPPORT); + } + + /* Re-entry once we're suspending is not allowed. */ + status = acpi_sleep_disable(sc); + if (ACPI_FAILURE(status)) { + device_printf(sc->acpi_dev, + "suspend request ignored (not ready yet)\n"); + return (status); + } + + if (state == ACPI_STATE_S5) { + /* + * Shut down cleanly and power off. This will call us back through the + * shutdown handlers. + */ + shutdown_nice(RB_POWEROFF); + return_ACPI_STATUS (AE_OK); + } + + EVENTHANDLER_INVOKE(power_suspend); + + if (smp_started) { + thread_lock(curthread); + sched_bind(curthread, 0); + thread_unlock(curthread); + } + + /* + * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE + * drivers need this. + */ + mtx_lock(&Giant); + + slp_state = ACPI_SS_NONE; + + sc->acpi_sstate = state; + + /* Enable any GPEs as appropriate and requested by the user. */ + acpi_wake_prep_walk(state); + slp_state = ACPI_SS_GPE_SET; + + /* + * Inform all devices that we are going to sleep. If at least one + * device fails, DEVICE_SUSPEND() automatically resumes the tree. + * + * XXX Note that a better two-pass approach with a 'veto' pass + * followed by a "real thing" pass would be better, but the current + * bus interface does not provide for this. + */ + if (DEVICE_SUSPEND(root_bus) != 0) { + device_printf(sc->acpi_dev, "device_suspend failed\n"); + goto backout; + } + slp_state = ACPI_SS_DEV_SUSPEND; + + /* If testing device suspend only, back out of everything here. */ + if (acpi_susp_bounce) + goto backout; + + status = AcpiEnterSleepStatePrep(state); + if (ACPI_FAILURE(status)) { + device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", + AcpiFormatException(status)); + goto backout; + } + slp_state = ACPI_SS_SLP_PREP; + + if (sc->acpi_sleep_delay > 0) + DELAY(sc->acpi_sleep_delay * 1000000); + + if (state != ACPI_STATE_S1) { + if (acpi_sleep_machdep(sc, state)) + goto backout; + + /* Re-enable ACPI hardware on wakeup from sleep state 4. */ + if (state == ACPI_STATE_S4) + AcpiEnable(); + } else { + ACPI_DISABLE_IRQS(); + status = AcpiEnterSleepState(state); + if (ACPI_FAILURE(status)) { + device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", + AcpiFormatException(status)); + goto backout; + } + } + slp_state = ACPI_SS_SLEPT; + + /* + * Back out state according to how far along we got in the suspend + * process. This handles both the error and success cases. + */ +backout: + if (slp_state >= ACPI_SS_GPE_SET) { + acpi_wake_prep_walk(state); + sc->acpi_sstate = ACPI_STATE_S0; + } + if (slp_state >= ACPI_SS_SLP_PREP) { + AcpiLeaveSleepStatePrep(state); + AcpiLeaveSleepState(state); + } + if (slp_state >= ACPI_SS_DEV_SUSPEND) + DEVICE_RESUME(root_bus); + if (slp_state >= ACPI_SS_SLEPT) { + acpi_resync_clock(sc); + acpi_enable_fixed_events(sc); + } + sc->acpi_next_sstate = 0; + + mtx_unlock(&Giant); + + if (smp_started) { + thread_lock(curthread); + sched_unbind(curthread); + thread_unlock(curthread); + } + + EVENTHANDLER_INVOKE(power_resume); + + /* Allow another sleep request after a while. */ + timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); + + /* Run /etc/rc.resume after we are back. */ + if (devctl_process_running()) + acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); + + return_ACPI_STATUS (status); +} + +static void +acpi_resync_clock(struct acpi_softc *sc) +{ +#ifdef __amd64__ + if (!acpi_reset_clock) + return; + + /* + * Warm up timecounter again and reset system clock. + */ + (void)timecounter->tc_get_timecount(timecounter); + (void)timecounter->tc_get_timecount(timecounter); + inittodr(time_second + sc->acpi_sleep_delay); +#endif +} + +/* Enable or disable the device's wake GPE. */ +int +acpi_wake_set_enable(device_t dev, int enable) +{ + struct acpi_prw_data prw; + ACPI_STATUS status; + int flags; + + /* Make sure the device supports waking the system and get the GPE. */ + if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) + return (ENXIO); + + flags = acpi_get_flags(dev); + if (enable) { + status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, + ACPI_GPE_ENABLE); + if (ACPI_FAILURE(status)) { + device_printf(dev, "enable wake failed\n"); + return (ENXIO); + } + acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); + } else { + status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, + ACPI_GPE_DISABLE); + if (ACPI_FAILURE(status)) { + device_printf(dev, "disable wake failed\n"); + return (ENXIO); + } + acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); + } + + return (0); +} + +static int +acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) +{ + struct acpi_prw_data prw; + device_t dev; + + /* Check that this is a wake-capable device and get its GPE. */ + if (acpi_parse_prw(handle, &prw) != 0) + return (ENXIO); + dev = acpi_get_device(handle); + + /* + * The destination sleep state must be less than (i.e., higher power) + * or equal to the value specified by _PRW. If this GPE cannot be + * enabled for the next sleep state, then disable it. If it can and + * the user requested it be enabled, turn on any required power resources + * and set _PSW. + */ + if (sstate > prw.lowest_wake) { + AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); + if (bootverbose) + device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", + acpi_name(handle), sstate); + } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { + acpi_pwr_wake_enable(handle, 1); + acpi_SetInteger(handle, "_PSW", 1); + if (bootverbose) + device_printf(dev, "wake_prep enabled for %s (S%d)\n", + acpi_name(handle), sstate); + } + + return (0); +} + +static int +acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) +{ + struct acpi_prw_data prw; + device_t dev; + + /* + * Check that this is a wake-capable device and get its GPE. Return + * now if the user didn't enable this device for wake. + */ + if (acpi_parse_prw(handle, &prw) != 0) + return (ENXIO); + dev = acpi_get_device(handle); + if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) + return (0); + + /* + * If this GPE couldn't be enabled for the previous sleep state, it was + * disabled before going to sleep so re-enable it. If it was enabled, + * clear _PSW and turn off any power resources it used. + */ + if (sstate > prw.lowest_wake) { + AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); + if (bootverbose) + device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); + } else { + acpi_SetInteger(handle, "_PSW", 0); + acpi_pwr_wake_enable(handle, 0); + if (bootverbose) + device_printf(dev, "run_prep cleaned up for %s\n", + acpi_name(handle)); + } + + return (0); +} + +static ACPI_STATUS +acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) +{ + int sstate; + + /* If suspending, run the sleep prep function, otherwise wake. */ + sstate = *(int *)context; + if (AcpiGbl_SystemAwakeAndRunning) + acpi_wake_sleep_prep(handle, sstate); + else + acpi_wake_run_prep(handle, sstate); + return (AE_OK); +} + +/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ +static int +acpi_wake_prep_walk(int sstate) +{ + ACPI_HANDLE sb_handle; + + if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) + AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, + acpi_wake_prep, NULL, &sstate, NULL); + return (0); +} + +/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ +static int +acpi_wake_sysctl_walk(device_t dev) +{ + int error, i, numdevs; + device_t *devlist; + device_t child; + ACPI_STATUS status; + + error = device_get_children(dev, &devlist, &numdevs); + if (error != 0 || numdevs == 0) { + if (numdevs == 0) + free(devlist, M_TEMP); + return (error); + } + for (i = 0; i < numdevs; i++) { + child = devlist[i]; + acpi_wake_sysctl_walk(child); + if (!device_is_attached(child)) + continue; + status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); + if (ACPI_SUCCESS(status)) { + SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), + SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, + "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, + acpi_wake_set_sysctl, "I", "Device set to wake the system"); + } + } + free(devlist, M_TEMP); + + return (0); +} + +/* Enable or disable wake from userland. */ +static int +acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) +{ + int enable, error; + device_t dev; + + dev = (device_t)arg1; + enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; + + error = sysctl_handle_int(oidp, &enable, 0, req); + if (error != 0 || req->newptr == NULL) + return (error); + if (enable != 0 && enable != 1) + return (EINVAL); + + return (acpi_wake_set_enable(dev, enable)); +} + +/* Parse a device's _PRW into a structure. */ +int +acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) +{ + ACPI_STATUS status; + ACPI_BUFFER prw_buffer; + ACPI_OBJECT *res, *res2; + int error, i, power_count; + + if (h == NULL || prw == NULL) + return (EINVAL); + + /* + * The _PRW object (7.2.9) is only required for devices that have the + * ability to wake the system from a sleeping state. + */ + error = EINVAL; + prw_buffer.Pointer = NULL; + prw_buffer.Length = ACPI_ALLOCATE_BUFFER; + status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); + if (ACPI_FAILURE(status)) + return (ENOENT); + res = (ACPI_OBJECT *)prw_buffer.Pointer; + if (res == NULL) + return (ENOENT); + if (!ACPI_PKG_VALID(res, 2)) + goto out; + + /* + * Element 1 of the _PRW object: + * The lowest power system sleeping state that can be entered while still + * providing wake functionality. The sleeping state being entered must + * be less than (i.e., higher power) or equal to this value. + */ + if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) + goto out; + + /* + * Element 0 of the _PRW object: + */ + switch (res->Package.Elements[0].Type) { + case ACPI_TYPE_INTEGER: + /* + * If the data type of this package element is numeric, then this + * _PRW package element is the bit index in the GPEx_EN, in the + * GPE blocks described in the FADT, of the enable bit that is + * enabled for the wake event. + */ + prw->gpe_handle = NULL; + prw->gpe_bit = res->Package.Elements[0].Integer.Value; + error = 0; + break; + case ACPI_TYPE_PACKAGE: + /* + * If the data type of this package element is a package, then this + * _PRW package element is itself a package containing two + * elements. The first is an object reference to the GPE Block + * device that contains the GPE that will be triggered by the wake + * event. The second element is numeric and it contains the bit + * index in the GPEx_EN, in the GPE Block referenced by the + * first element in the package, of the enable bit that is enabled for + * the wake event. + * + * For example, if this field is a package then it is of the form: + * Package() {\_SB.PCI0.ISA.GPE, 2} + */ + res2 = &res->Package.Elements[0]; + if (!ACPI_PKG_VALID(res2, 2)) + goto out; + prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); + if (prw->gpe_handle == NULL) + goto out; + if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) + goto out; + error = 0; + break; + default: + goto out; + } + + /* Elements 2 to N of the _PRW object are power resources. */ + power_count = res->Package.Count - 2; + if (power_count > ACPI_PRW_MAX_POWERRES) { + printf("ACPI device %s has too many power resources\n", acpi_name(h)); + power_count = 0; + } + prw->power_res_count = power_count; + for (i = 0; i < power_count; i++) + prw->power_res[i] = res->Package.Elements[i]; + +out: + if (prw_buffer.Pointer != NULL) + AcpiOsFree(prw_buffer.Pointer); + return (error); +} + +/* + * ACPI Event Handlers + */ + +/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ + +static void +acpi_system_eventhandler_sleep(void *arg, int state) +{ + struct acpi_softc *sc = (struct acpi_softc *)arg; + int ret; + + ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); + + /* Check if button action is disabled or unknown. */ + if (state == ACPI_STATE_UNKNOWN) + return; + + /* Request that the system prepare to enter the given suspend state. */ + ret = acpi_ReqSleepState(sc, state); + if (ret != 0) + device_printf(sc->acpi_dev, + "request to enter state S%d failed (err %d)\n", state, ret); + + return_VOID; +} + +static void +acpi_system_eventhandler_wakeup(void *arg, int state) +{ + + ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); + + /* Currently, nothing to do for wakeup. */ + + return_VOID; +} + +/* + * ACPICA Event Handlers (FixedEvent, also called from button notify handler) + */ +static void +acpi_invoke_sleep_eventhandler(void *context) +{ + + EVENTHANDLER_INVOKE(acpi_sleep_event, *(int *)context); +} + +static void +acpi_invoke_wake_eventhandler(void *context) +{ + + EVENTHANDLER_INVOKE(acpi_wakeup_event, *(int *)context); +} + +UINT32 +acpi_event_power_button_sleep(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, + acpi_invoke_sleep_eventhandler, &sc->acpi_power_button_sx))) + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + return_VALUE (ACPI_INTERRUPT_HANDLED); +} + +UINT32 +acpi_event_power_button_wake(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, + acpi_invoke_wake_eventhandler, &sc->acpi_power_button_sx))) + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + return_VALUE (ACPI_INTERRUPT_HANDLED); +} + +UINT32 +acpi_event_sleep_button_sleep(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, + acpi_invoke_sleep_eventhandler, &sc->acpi_sleep_button_sx))) + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + return_VALUE (ACPI_INTERRUPT_HANDLED); +} + +UINT32 +acpi_event_sleep_button_wake(void *context) +{ + struct acpi_softc *sc = (struct acpi_softc *)context; + + ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); + + if (ACPI_FAILURE(AcpiOsExecute(OSL_NOTIFY_HANDLER, + acpi_invoke_wake_eventhandler, &sc->acpi_sleep_button_sx))) + return_VALUE (ACPI_INTERRUPT_NOT_HANDLED); + return_VALUE (ACPI_INTERRUPT_HANDLED); +} + +/* + * XXX This static buffer is suboptimal. There is no locking so only + * use this for single-threaded callers. + */ +char * +acpi_name(ACPI_HANDLE handle) +{ + ACPI_BUFFER buf; + static char data[256]; + + buf.Length = sizeof(data); + buf.Pointer = data; + + if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) + return (data); + return ("(unknown)"); +} + +/* + * Debugging/bug-avoidance. Avoid trying to fetch info on various + * parts of the namespace. + */ +int +acpi_avoid(ACPI_HANDLE handle) +{ + char *cp, *env, *np; + int len; + + np = acpi_name(handle); + if (*np == '\\') + np++; + if ((env = 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; + +int +acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) +{ + struct acpi_ioctl_hook *hp; + + if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) + return (ENOMEM); + hp->cmd = cmd; + hp->fn = fn; + hp->arg = arg; + + ACPI_LOCK(acpi); + if (acpi_ioctl_hooks_initted == 0) { + TAILQ_INIT(&acpi_ioctl_hooks); + acpi_ioctl_hooks_initted = 1; + } + TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); + ACPI_UNLOCK(acpi); + + return (0); +} + +void +acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) +{ + struct acpi_ioctl_hook *hp; + + ACPI_LOCK(acpi); + TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) + if (hp->cmd == cmd && hp->fn == fn) + break; + + if (hp != NULL) { + TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); + free(hp, M_ACPIDEV); + } + ACPI_UNLOCK(acpi); +} + +static int +acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) +{ + return (0); +} + +static int +acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) +{ + return (0); +} + +static int +acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) +{ + struct acpi_softc *sc; + struct acpi_ioctl_hook *hp; + int error, state; + + error = 0; + hp = NULL; + sc = dev->si_drv1; + + /* + * Scan the list of registered ioctls, looking for handlers. + */ + ACPI_LOCK(acpi); + if (acpi_ioctl_hooks_initted) + TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { + if (hp->cmd == cmd) + break; + } + ACPI_UNLOCK(acpi); + if (hp) + return (hp->fn(cmd, addr, hp->arg)); + + /* + * Core ioctls are not permitted for non-writable user. + * Currently, other ioctls just fetch information. + * Not changing system behavior. + */ + if ((flag & FWRITE) == 0) + return (EPERM); + + /* Core system ioctls. */ + switch (cmd) { + case ACPIIO_REQSLPSTATE: + state = *(int *)addr; + if (state != ACPI_STATE_S5) + return (acpi_ReqSleepState(sc, state)); + device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); + error = EOPNOTSUPP; + break; + case ACPIIO_ACKSLPSTATE: + error = *(int *)addr; + error = acpi_AckSleepState(sc->acpi_clone, error); + break; + case ACPIIO_SETSLPSTATE: /* DEPRECATED */ + state = *(int *)addr; + if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) + return (EINVAL); + if (!acpi_sleep_states[state]) + return (EOPNOTSUPP); + if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) + error = ENXIO; + break; + default: + error = ENXIO; + break; + } + + return (error); +} + +static int +acpi_sname2sstate(const char *sname) +{ + int sstate; + + if (toupper(sname[0]) == 'S') { + sstate = sname[1] - '0'; + if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && + sname[2] == '\0') + return (sstate); + } else if (strcasecmp(sname, "NONE") == 0) + return (ACPI_STATE_UNKNOWN); + return (-1); +} + +static const char * +acpi_sstate2sname(int sstate) +{ + static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; + + if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) + return (snames[sstate]); + else if (sstate == ACPI_STATE_UNKNOWN) + return ("NONE"); + return (NULL); +} + +static int +acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) +{ + int error; + struct sbuf sb; + UINT8 state; + + sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); + for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) + if (acpi_sleep_states[state]) + sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); + sbuf_trim(&sb); + sbuf_finish(&sb); + error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); + sbuf_delete(&sb); + return (error); +} + +static int +acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) +{ + char sleep_state[10]; + int error, new_state, old_state; + + old_state = *(int *)oidp->oid_arg1; + strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); + error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); + if (error == 0 && req->newptr != NULL) { + new_state = acpi_sname2sstate(sleep_state); + if (new_state < ACPI_STATE_S1) + return (EINVAL); + if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) + return (EOPNOTSUPP); + if (new_state != old_state) + *(int *)oidp->oid_arg1 = new_state; + } + return (error); +} + +/* Inform devctl(4) when we receive a Notify. */ +void +acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) +{ + char notify_buf[16]; + ACPI_BUFFER handle_buf; + ACPI_STATUS status; + + if (subsystem == NULL) + return; + + handle_buf.Pointer = NULL; + handle_buf.Length = ACPI_ALLOCATE_BUFFER; + status = AcpiNsHandleToPathname(h, &handle_buf); + if (ACPI_FAILURE(status)) + return; + snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); + devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); + AcpiOsFree(handle_buf.Pointer); +} + +#ifdef ACPI_DEBUG +/* + * Support for parsing debug options from the kernel environment. + * + * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers + * by specifying the names of the bits in the debug.acpi.layer and + * debug.acpi.level environment variables. Bits may be unset by + * prefixing the bit name with !. + */ +struct debugtag +{ + char *name; + UINT32 value; +}; + +static struct debugtag dbg_layer[] = { + {"ACPI_UTILITIES", ACPI_UTILITIES}, + {"ACPI_HARDWARE", ACPI_HARDWARE}, + {"ACPI_EVENTS", ACPI_EVENTS}, + {"ACPI_TABLES", ACPI_TABLES}, + {"ACPI_NAMESPACE", ACPI_NAMESPACE}, + {"ACPI_PARSER", ACPI_PARSER}, + {"ACPI_DISPATCHER", ACPI_DISPATCHER}, + {"ACPI_EXECUTER", ACPI_EXECUTER}, + {"ACPI_RESOURCES", ACPI_RESOURCES}, + {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, + {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, + {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, + {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, + + {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, + {"ACPI_BATTERY", ACPI_BATTERY}, + {"ACPI_BUS", ACPI_BUS}, + {"ACPI_BUTTON", ACPI_BUTTON}, + {"ACPI_EC", ACPI_EC}, + {"ACPI_FAN", ACPI_FAN}, + {"ACPI_POWERRES", ACPI_POWERRES}, + {"ACPI_PROCESSOR", ACPI_PROCESSOR}, + {"ACPI_THERMAL", ACPI_THERMAL}, + {"ACPI_TIMER", ACPI_TIMER}, + {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, + {NULL, 0} +}; + +static struct debugtag dbg_level[] = { + {"ACPI_LV_INIT", ACPI_LV_INIT}, + {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, + {"ACPI_LV_INFO", ACPI_LV_INFO}, + {"ACPI_LV_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. */ + ACPI_SERIAL_BEGIN(acpi); + if (*dbg == 0) { + sbuf_cpy(&sb, "NONE"); + } else if (req->newptr == NULL) { + for (; tag->name != NULL; tag++) { + if ((*dbg & tag->value) == tag->value) + sbuf_printf(&sb, "%s ", tag->name); + } + } + sbuf_trim(&sb); + sbuf_finish(&sb); + + /* 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); + } + ACPI_SERIAL_END(acpi); + + return (error); +} + +SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, + "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); +SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, + "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); +#endif /* ACPI_DEBUG */ + +static int +acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) +{ + int error; + int old; + + old = acpi_debug_objects; + error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); + if (error != 0 || req->newptr == NULL) + return (error); + if (old == acpi_debug_objects || (old && acpi_debug_objects)) + return (0); + + ACPI_SERIAL_BEGIN(acpi); + AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; + ACPI_SERIAL_END(acpi); + + return (0); +} + +static int +acpi_parse_interfaces(char *str, struct acpi_interface *iface) +{ + char *p; + size_t len; + int i, j; + + p = str; + while (isspace(*p) || *p == ',') + p++; + len = strlen(p); + if (len == 0) + return (0); + p = strdup(p, M_TEMP); + for (i = 0; i < len; i++) + if (p[i] == ',') + p[i] = '\0'; + i = j = 0; + while (i < len) + if (isspace(p[i]) || p[i] == '\0') + i++; + else { + i += strlen(p + i) + 1; + j++; + } + if (j == 0) { + free(p, M_TEMP); + return (0); + } + iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); + iface->num = j; + i = j = 0; + while (i < len) + if (isspace(p[i]) || p[i] == '\0') + i++; + else { + iface->data[j] = p + i; + i += strlen(p + i) + 1; + j++; + } + + return (j); +} + +static void +acpi_free_interfaces(struct acpi_interface *iface) +{ + + free(iface->data[0], M_TEMP); + free(iface->data, M_TEMP); +} + +static void +acpi_reset_interfaces(device_t dev) +{ + struct acpi_interface list; + ACPI_STATUS status; + int i; + + if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { + for (i = 0; i < list.num; i++) { + status = AcpiInstallInterface(list.data[i]); + if (ACPI_FAILURE(status)) + device_printf(dev, + "failed to install _OSI(\"%s\"): %s\n", + list.data[i], AcpiFormatException(status)); + else if (bootverbose) + device_printf(dev, "installed _OSI(\"%s\")\n", + list.data[i]); + } + acpi_free_interfaces(&list); + } + if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { + for (i = 0; i < list.num; i++) { + status = AcpiRemoveInterface(list.data[i]); + if (ACPI_FAILURE(status)) + device_printf(dev, + "failed to remove _OSI(\"%s\"): %s\n", + list.data[i], AcpiFormatException(status)); + else if (bootverbose) + device_printf(dev, "removed _OSI(\"%s\")\n", + list.data[i]); + } + acpi_free_interfaces(&list); + } +} + +static int +acpi_pm_func(u_long cmd, void *arg, ...) +{ + int state, acpi_state; + int error; + struct acpi_softc *sc; + va_list ap; + + error = 0; + switch (cmd) { + case POWER_CMD_SUSPEND: + sc = (struct acpi_softc *)arg; + if (sc == NULL) { + error = EINVAL; + goto out; + } + + va_start(ap, arg); + state = va_arg(ap, int); + va_end(ap); + + switch (state) { + case POWER_SLEEP_STATE_STANDBY: + acpi_state = sc->acpi_standby_sx; + break; + case POWER_SLEEP_STATE_SUSPEND: + acpi_state = sc->acpi_suspend_sx; + break; + case POWER_SLEEP_STATE_HIBERNATE: + acpi_state = ACPI_STATE_S4; + break; + default: + error = EINVAL; + goto out; + } + + if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) + error = ENXIO; + break; + default: + error = EINVAL; + goto out; + } + +out: + return (error); +} + +static void +acpi_pm_register(void *arg) +{ + if (!cold || resource_disabled("acpi", 0)) + return; + + power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); +} + +SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); |
