acpi.c revision 182071
1133833Sdwmalone/*- 2133833Sdwmalone * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3133833Sdwmalone * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4133833Sdwmalone * Copyright (c) 2000, 2001 Michael Smith 5133833Sdwmalone * Copyright (c) 2000 BSDi 6133833Sdwmalone * All rights reserved. 7133833Sdwmalone * 8133833Sdwmalone * Redistribution and use in source and binary forms, with or without 9133833Sdwmalone * modification, are permitted provided that the following conditions 10133833Sdwmalone * are met: 11133833Sdwmalone * 1. Redistributions of source code must retain the above copyright 12133833Sdwmalone * notice, this list of conditions and the following disclaimer. 13133833Sdwmalone * 2. Redistributions in binary form must reproduce the above copyright 14133833Sdwmalone * notice, this list of conditions and the following disclaimer in the 15133833Sdwmalone * documentation and/or other materials provided with the distribution. 16133833Sdwmalone * 17133833Sdwmalone * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18133833Sdwmalone * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19133833Sdwmalone * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20133833Sdwmalone * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21133833Sdwmalone * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22133833Sdwmalone * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23133833Sdwmalone * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24133833Sdwmalone * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25133833Sdwmalone * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26133833Sdwmalone * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27133833Sdwmalone * SUCH DAMAGE. 28133833Sdwmalone */ 29133833Sdwmalone 30133833Sdwmalone#include <sys/cdefs.h> 31133833Sdwmalone__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 182071 2008-08-23 16:38:20Z imp $"); 32133833Sdwmalone 33133833Sdwmalone#include "opt_acpi.h" 34133833Sdwmalone#include <sys/param.h> 35133833Sdwmalone#include <sys/kernel.h> 36133833Sdwmalone#include <sys/proc.h> 37133833Sdwmalone#include <sys/fcntl.h> 38133833Sdwmalone#include <sys/malloc.h> 39133833Sdwmalone#include <sys/module.h> 40133833Sdwmalone#include <sys/bus.h> 41133833Sdwmalone#include <sys/conf.h> 42133833Sdwmalone#include <sys/ioccom.h> 43133833Sdwmalone#include <sys/reboot.h> 44133833Sdwmalone#include <sys/sysctl.h> 45133833Sdwmalone#include <sys/ctype.h> 46133833Sdwmalone#include <sys/linker.h> 47133833Sdwmalone#include <sys/power.h> 48133833Sdwmalone#include <sys/sbuf.h> 49133833Sdwmalone#include <sys/smp.h> 50133833Sdwmalone 51133833Sdwmalone#if defined(__i386__) || defined(__amd64__) 52133833Sdwmalone#include <machine/pci_cfgreg.h> 53133833Sdwmalone#endif 54133833Sdwmalone#include <machine/resource.h> 55133833Sdwmalone#include <machine/bus.h> 56133833Sdwmalone#include <sys/rman.h> 57133833Sdwmalone#include <isa/isavar.h> 58133833Sdwmalone#include <isa/pnpvar.h> 59133833Sdwmalone 60133833Sdwmalone#include <contrib/dev/acpica/acpi.h> 61133833Sdwmalone#include <dev/acpica/acpivar.h> 62133833Sdwmalone#include <dev/acpica/acpiio.h> 63133833Sdwmalone#include <contrib/dev/acpica/achware.h> 64133833Sdwmalone#include <contrib/dev/acpica/acnamesp.h> 65133833Sdwmalone 66133833Sdwmalone#include "pci_if.h" 67133833Sdwmalone#include <dev/pci/pcivar.h> 68133833Sdwmalone#include <dev/pci/pci_private.h> 69133833Sdwmalone 70133833Sdwmalone#include <vm/vm_param.h> 71133833Sdwmalone 72133833SdwmaloneMALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 73133833Sdwmalone 74133833Sdwmalone/* Hooks for the ACPI CA debugging infrastructure */ 75133833Sdwmalone#define _COMPONENT ACPI_BUS 76133833SdwmaloneACPI_MODULE_NAME("ACPI") 77133833Sdwmalone 78133833Sdwmalonestatic d_open_t acpiopen; 79133833Sdwmalonestatic d_close_t acpiclose; 80133833Sdwmalonestatic d_ioctl_t acpiioctl; 81133833Sdwmalone 82133833Sdwmalonestatic struct cdevsw acpi_cdevsw = { 83133833Sdwmalone .d_version = D_VERSION, 84133833Sdwmalone .d_open = acpiopen, 85133833Sdwmalone .d_close = acpiclose, 86133833Sdwmalone .d_ioctl = acpiioctl, 87133833Sdwmalone .d_name = "acpi", 88133833Sdwmalone}; 89133833Sdwmalone 90133833Sdwmalone/* Global mutex for locking access to the ACPI subsystem. */ 91133833Sdwmalonestruct mtx acpi_mutex; 92133833Sdwmalone 93133833Sdwmalone/* Bitmap of device quirks. */ 94133833Sdwmaloneint acpi_quirks; 95133833Sdwmalone 96133833Sdwmalonestatic int acpi_modevent(struct module *mod, int event, void *junk); 97133833Sdwmalonestatic int acpi_probe(device_t dev); 98133833Sdwmalonestatic int acpi_attach(device_t dev); 99133833Sdwmalonestatic int acpi_suspend(device_t dev); 100133833Sdwmalonestatic int acpi_resume(device_t dev); 101133833Sdwmalonestatic int acpi_shutdown(device_t dev); 102133833Sdwmalonestatic device_t acpi_add_child(device_t bus, int order, const char *name, 103133833Sdwmalone int unit); 104133833Sdwmalonestatic int acpi_print_child(device_t bus, device_t child); 105133833Sdwmalonestatic void acpi_probe_nomatch(device_t bus, device_t child); 106133833Sdwmalonestatic void acpi_driver_added(device_t dev, driver_t *driver); 107133833Sdwmalonestatic int acpi_read_ivar(device_t dev, device_t child, int index, 108133833Sdwmalone uintptr_t *result); 109133833Sdwmalonestatic int acpi_write_ivar(device_t dev, device_t child, int index, 110133833Sdwmalone uintptr_t value); 111133833Sdwmalonestatic struct resource_list *acpi_get_rlist(device_t dev, device_t child); 112133833Sdwmalonestatic int acpi_sysres_alloc(device_t dev); 113133833Sdwmalonestatic struct resource *acpi_alloc_resource(device_t bus, device_t child, 114133833Sdwmalone int type, int *rid, u_long start, u_long end, 115133833Sdwmalone u_long count, u_int flags); 116133833Sdwmalonestatic int acpi_release_resource(device_t bus, device_t child, int type, 117133833Sdwmalone int rid, struct resource *r); 118133833Sdwmalonestatic void acpi_delete_resource(device_t bus, device_t child, int type, 119133833Sdwmalone int rid); 120133833Sdwmalonestatic uint32_t acpi_isa_get_logicalid(device_t dev); 121133833Sdwmalonestatic int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 122133833Sdwmalonestatic char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 123133833Sdwmalonestatic ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 124133833Sdwmalone ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 125133833Sdwmalone ACPI_BUFFER *ret); 126133833Sdwmalonestatic int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 127133833Sdwmalone int *dstate); 128133833Sdwmalonestatic ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 129133833Sdwmalone void *context, void **retval); 130133833Sdwmalonestatic ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 131133833Sdwmalone int max_depth, acpi_scan_cb_t user_fn, void *arg); 132133833Sdwmalonestatic int acpi_set_powerstate_method(device_t bus, device_t child, 133133833Sdwmalone int state); 134133833Sdwmalonestatic int acpi_isa_pnp_probe(device_t bus, device_t child, 135133833Sdwmalone struct isa_pnp_id *ids); 136133833Sdwmalonestatic void acpi_probe_children(device_t bus); 137133833Sdwmalonestatic void acpi_probe_order(ACPI_HANDLE handle, int *order); 138133833Sdwmalonestatic ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 139133833Sdwmalone void *context, void **status); 140133833Sdwmalonestatic BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 141133833Sdwmalonestatic ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 142133833Sdwmalonestatic void acpi_shutdown_final(void *arg, int howto); 143133833Sdwmalonestatic void acpi_enable_fixed_events(struct acpi_softc *sc); 144133833Sdwmalonestatic int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 145133833Sdwmalonestatic int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 146133833Sdwmalonestatic int acpi_wake_prep_walk(int sstate); 147133833Sdwmalonestatic int acpi_wake_sysctl_walk(device_t dev); 148133833Sdwmalonestatic int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 149133833Sdwmalonestatic void acpi_system_eventhandler_sleep(void *arg, int state); 150133833Sdwmalonestatic void acpi_system_eventhandler_wakeup(void *arg, int state); 151133833Sdwmalonestatic int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 152133833Sdwmalonestatic int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 153133833Sdwmalonestatic int acpi_pm_func(u_long cmd, void *arg, ...); 154133833Sdwmalonestatic int acpi_child_location_str_method(device_t acdev, device_t child, 155133833Sdwmalone char *buf, size_t buflen); 156133833Sdwmalonestatic int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 157133833Sdwmalone char *buf, size_t buflen); 158133833Sdwmalone#if defined(__i386__) || defined(__amd64__) 159133833Sdwmalonestatic void acpi_enable_pcie(void); 160133833Sdwmalone#endif 161133833Sdwmalone 162133833Sdwmalonestatic device_method_t acpi_methods[] = { 163133833Sdwmalone /* Device interface */ 164133833Sdwmalone DEVMETHOD(device_probe, acpi_probe), 165133833Sdwmalone DEVMETHOD(device_attach, acpi_attach), 166133833Sdwmalone DEVMETHOD(device_shutdown, acpi_shutdown), 167133833Sdwmalone DEVMETHOD(device_detach, bus_generic_detach), 168133833Sdwmalone DEVMETHOD(device_suspend, acpi_suspend), 169133833Sdwmalone DEVMETHOD(device_resume, acpi_resume), 170133833Sdwmalone 171133833Sdwmalone /* Bus interface */ 172133833Sdwmalone DEVMETHOD(bus_add_child, acpi_add_child), 173133833Sdwmalone DEVMETHOD(bus_print_child, acpi_print_child), 174133833Sdwmalone DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 175133833Sdwmalone DEVMETHOD(bus_driver_added, acpi_driver_added), 176133833Sdwmalone DEVMETHOD(bus_read_ivar, acpi_read_ivar), 177133833Sdwmalone DEVMETHOD(bus_write_ivar, acpi_write_ivar), 178133833Sdwmalone DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 179133833Sdwmalone DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 180133833Sdwmalone DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 181133833Sdwmalone DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 182133833Sdwmalone DEVMETHOD(bus_release_resource, acpi_release_resource), 183133833Sdwmalone DEVMETHOD(bus_delete_resource, acpi_delete_resource), 184133833Sdwmalone DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 185133833Sdwmalone DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 186133833Sdwmalone DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 187133833Sdwmalone DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 188133833Sdwmalone DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 189133833Sdwmalone DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 190133833Sdwmalone 191133833Sdwmalone /* ACPI bus */ 192133833Sdwmalone DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 193133833Sdwmalone DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 194133833Sdwmalone DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 195133833Sdwmalone DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 196133833Sdwmalone 197133833Sdwmalone /* PCI emulation */ 198133833Sdwmalone DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 199133833Sdwmalone 200133833Sdwmalone /* ISA emulation */ 201133833Sdwmalone DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 202133833Sdwmalone 203133833Sdwmalone {0, 0} 204133833Sdwmalone}; 205133833Sdwmalone 206133833Sdwmalonestatic driver_t acpi_driver = { 207133833Sdwmalone "acpi", 208133833Sdwmalone acpi_methods, 209133833Sdwmalone sizeof(struct acpi_softc), 210133833Sdwmalone}; 211133833Sdwmalone 212133833Sdwmalonestatic devclass_t acpi_devclass; 213133833SdwmaloneDRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 214133833SdwmaloneMODULE_VERSION(acpi, 1); 215133833Sdwmalone 216133833SdwmaloneACPI_SERIAL_DECL(acpi, "ACPI root bus"); 217133833Sdwmalone 218133833Sdwmalone/* Local pools for managing system resources for ACPI child devices. */ 219133833Sdwmalonestatic struct rman acpi_rman_io, acpi_rman_mem; 220133833Sdwmalone 221133833Sdwmalone#define ACPI_MINIMUM_AWAKETIME 5 222133833Sdwmalone 223133833Sdwmalonestatic const char* sleep_state_names[] = { 224133833Sdwmalone "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 225133833Sdwmalone 226133833Sdwmalone/* Holds the description of the acpi0 device. */ 227133833Sdwmalonestatic char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 228133833Sdwmalone 229133833SdwmaloneSYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 230133833Sdwmalonestatic char acpi_ca_version[12]; 231133833SdwmaloneSYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 232133833Sdwmalone acpi_ca_version, 0, "Version of Intel ACPI-CA"); 233133833Sdwmalone 234133833Sdwmalone/* 235133833Sdwmalone * Allow override of whether methods execute in parallel or not. 236133833Sdwmalone * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 237133833Sdwmalone * errors for AML that really can't handle parallel method execution. 238133833Sdwmalone * It is off by default since this breaks recursive methods and 239133833Sdwmalone * some IBMs use such code. 240133833Sdwmalone */ 241133833Sdwmalonestatic int acpi_serialize_methods; 242133833SdwmaloneTUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 243133833Sdwmalone 244133833Sdwmalone/* Power devices off and on in suspend and resume. XXX Remove once tested. */ 245133833Sdwmalonestatic int acpi_do_powerstate = 1; 246133833SdwmaloneTUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 247133833SdwmaloneSYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 248133833Sdwmalone &acpi_do_powerstate, 1, "Turn off devices when suspending."); 249133833Sdwmalone 250133833Sdwmalone/* Allow users to override quirks. */ 251133833SdwmaloneTUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 252133833Sdwmalone 253133833Sdwmalonestatic int acpi_susp_bounce; 254133833SdwmaloneSYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 255133833Sdwmalone &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 256133833Sdwmalone 257133833Sdwmalone/* 258133833Sdwmalone * ACPI can only be loaded as a module by the loader; activating it after 259133833Sdwmalone * system bootstrap time is not useful, and can be fatal to the system. 260133833Sdwmalone * It also cannot be unloaded, since the entire system bus hierarchy hangs 261133833Sdwmalone * off it. 262133833Sdwmalone */ 263133833Sdwmalonestatic int 264133833Sdwmaloneacpi_modevent(struct module *mod, int event, void *junk) 265133833Sdwmalone{ 266133833Sdwmalone switch (event) { 267133833Sdwmalone case MOD_LOAD: 268133833Sdwmalone if (!cold) { 269133833Sdwmalone printf("The ACPI driver cannot be loaded after boot.\n"); 270133833Sdwmalone return (EPERM); 271133833Sdwmalone } 272133833Sdwmalone break; 273133833Sdwmalone case MOD_UNLOAD: 274133833Sdwmalone if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 275133833Sdwmalone return (EBUSY); 276133833Sdwmalone break; 277133833Sdwmalone default: 278133833Sdwmalone break; 279133833Sdwmalone } 280133833Sdwmalone return (0); 281133833Sdwmalone} 282133833Sdwmalone 283133833Sdwmalone/* 284133833Sdwmalone * Perform early initialization. 285133833Sdwmalone */ 286133833SdwmaloneACPI_STATUS 287133833Sdwmaloneacpi_Startup(void) 288133833Sdwmalone{ 289133833Sdwmalone static int started = 0; 290133833Sdwmalone ACPI_STATUS status; 291133833Sdwmalone int val; 292133833Sdwmalone 293133833Sdwmalone ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 294133833Sdwmalone 295133833Sdwmalone /* Only run the startup code once. The MADT driver also calls this. */ 296133833Sdwmalone if (started) 297133833Sdwmalone return_VALUE (AE_OK); 298133833Sdwmalone started = 1; 299133833Sdwmalone 300133833Sdwmalone /* 301133833Sdwmalone * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 302133833Sdwmalone * if more tables exist. 303133833Sdwmalone */ 304133833Sdwmalone if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 305133833Sdwmalone printf("ACPI: Table initialisation failed: %s\n", 306133833Sdwmalone AcpiFormatException(status)); 307133833Sdwmalone return_VALUE (status); 308133833Sdwmalone } 309133833Sdwmalone 310133833Sdwmalone /* Set up any quirks we have for this system. */ 311133833Sdwmalone if (acpi_quirks == ACPI_Q_OK) 312133833Sdwmalone acpi_table_quirks(&acpi_quirks); 313133833Sdwmalone 314133833Sdwmalone /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 315133833Sdwmalone if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 316133833Sdwmalone acpi_quirks &= ~ACPI_Q_BROKEN; 317133833Sdwmalone if (acpi_quirks & ACPI_Q_BROKEN) { 318133833Sdwmalone printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 319133833Sdwmalone status = AE_SUPPORT; 320133833Sdwmalone } 321133833Sdwmalone 322133833Sdwmalone return_VALUE (status); 323133833Sdwmalone} 324133833Sdwmalone 325133833Sdwmalone/* 326133833Sdwmalone * Detect ACPI and perform early initialisation. 327133833Sdwmalone */ 328133833Sdwmaloneint 329133833Sdwmaloneacpi_identify(void) 330133833Sdwmalone{ 331133833Sdwmalone ACPI_TABLE_RSDP *rsdp; 332133833Sdwmalone ACPI_TABLE_HEADER *rsdt; 333133833Sdwmalone ACPI_PHYSICAL_ADDRESS paddr; 334133833Sdwmalone struct sbuf sb; 335133833Sdwmalone 336133833Sdwmalone ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 337133833Sdwmalone 338133833Sdwmalone if (!cold) 339133833Sdwmalone return (ENXIO); 340133833Sdwmalone 341133833Sdwmalone /* Check that we haven't been disabled with a hint. */ 342133833Sdwmalone if (resource_disabled("acpi", 0)) 343133833Sdwmalone return (ENXIO); 344133833Sdwmalone 345133833Sdwmalone /* Check for other PM systems. */ 346133833Sdwmalone if (power_pm_get_type() != POWER_PM_TYPE_NONE && 347133833Sdwmalone power_pm_get_type() != POWER_PM_TYPE_ACPI) { 348133833Sdwmalone printf("ACPI identify failed, other PM system enabled.\n"); 349133833Sdwmalone return (ENXIO); 350133833Sdwmalone } 351133833Sdwmalone 352133833Sdwmalone /* Initialize root tables. */ 353133833Sdwmalone if (ACPI_FAILURE(acpi_Startup())) { 354133833Sdwmalone printf("ACPI: Try disabling either ACPI or apic support.\n"); 355133833Sdwmalone return (ENXIO); 356133833Sdwmalone } 357133833Sdwmalone 358133833Sdwmalone if ((paddr = AcpiOsGetRootPointer()) == 0 || 359133833Sdwmalone (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 360133833Sdwmalone return (ENXIO); 361133833Sdwmalone if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 362133833Sdwmalone paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 363133833Sdwmalone else 364133833Sdwmalone paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 365133833Sdwmalone AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 366133833Sdwmalone 367133833Sdwmalone if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 368133833Sdwmalone return (ENXIO); 369133833Sdwmalone sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 370133833Sdwmalone sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 371133833Sdwmalone sbuf_trim(&sb); 372133833Sdwmalone sbuf_putc(&sb, ' '); 373133833Sdwmalone sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 374133833Sdwmalone sbuf_trim(&sb); 375133833Sdwmalone sbuf_finish(&sb); 376133833Sdwmalone sbuf_delete(&sb); 377133833Sdwmalone AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 378133833Sdwmalone 379133833Sdwmalone snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 380133833Sdwmalone 381133833Sdwmalone return (0); 382133833Sdwmalone} 383133833Sdwmalone 384133833Sdwmalone/* 385133833Sdwmalone * Fetch some descriptive data from ACPI to put in our attach message. 386133833Sdwmalone */ 387static int 388acpi_probe(device_t dev) 389{ 390 391 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 392 393 device_set_desc(dev, acpi_desc); 394 395 return_VALUE (0); 396} 397 398static int 399acpi_attach(device_t dev) 400{ 401 struct acpi_softc *sc; 402 ACPI_TABLE_FACS *facs; 403 ACPI_STATUS status; 404 int error, state; 405 UINT32 flags; 406 UINT8 TypeA, TypeB; 407 char *env; 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 sc = device_get_softc(dev); 412 sc->acpi_dev = dev; 413 callout_init(&sc->susp_force_to, TRUE); 414 415 error = ENXIO; 416 417 /* Initialize resource manager. */ 418 acpi_rman_io.rm_type = RMAN_ARRAY; 419 acpi_rman_io.rm_start = 0; 420 acpi_rman_io.rm_end = 0xffff; 421 acpi_rman_io.rm_descr = "ACPI I/O ports"; 422 if (rman_init(&acpi_rman_io) != 0) 423 panic("acpi rman_init IO ports failed"); 424 acpi_rman_mem.rm_type = RMAN_ARRAY; 425 acpi_rman_mem.rm_start = 0; 426 acpi_rman_mem.rm_end = ~0ul; 427 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 428 if (rman_init(&acpi_rman_mem) != 0) 429 panic("acpi rman_init memory failed"); 430 431 /* Initialise the ACPI mutex */ 432 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 433 434 /* 435 * Set the globals from our tunables. This is needed because ACPI-CA 436 * uses UINT8 for some values and we have no tunable_byte. 437 */ 438 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 439 AcpiGbl_EnableInterpreterSlack = TRUE; 440 441 /* Start up the ACPI CA subsystem. */ 442 status = AcpiInitializeSubsystem(); 443 if (ACPI_FAILURE(status)) { 444 device_printf(dev, "Could not initialize Subsystem: %s\n", 445 AcpiFormatException(status)); 446 goto out; 447 } 448 449 /* Load ACPI name space. */ 450 status = AcpiLoadTables(); 451 if (ACPI_FAILURE(status)) { 452 device_printf(dev, "Could not load Namespace: %s\n", 453 AcpiFormatException(status)); 454 goto out; 455 } 456 457#if defined(__i386__) || defined(__amd64__) 458 /* Handle MCFG table if present. */ 459 acpi_enable_pcie(); 460#endif 461 462 /* Install the default address space handlers. */ 463 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 464 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 465 if (ACPI_FAILURE(status)) { 466 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 467 AcpiFormatException(status)); 468 goto out; 469 } 470 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 471 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 472 if (ACPI_FAILURE(status)) { 473 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 474 AcpiFormatException(status)); 475 goto out; 476 } 477 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 478 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 479 if (ACPI_FAILURE(status)) { 480 device_printf(dev, "could not initialise PciConfig handler: %s\n", 481 AcpiFormatException(status)); 482 goto out; 483 } 484 485 /* 486 * Note that some systems (specifically, those with namespace evaluation 487 * issues that require the avoidance of parts of the namespace) must 488 * avoid running _INI and _STA on everything, as well as dodging the final 489 * object init pass. 490 * 491 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 492 * 493 * XXX We should arrange for the object init pass after we have attached 494 * all our child devices, but on many systems it works here. 495 */ 496 flags = 0; 497 if (testenv("debug.acpi.avoid")) 498 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 499 500 /* Bring the hardware and basic handlers online. */ 501 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 502 device_printf(dev, "Could not enable ACPI: %s\n", 503 AcpiFormatException(status)); 504 goto out; 505 } 506 507 /* 508 * Call the ECDT probe function to provide EC functionality before 509 * the namespace has been evaluated. 510 * 511 * XXX This happens before the sysresource devices have been probed and 512 * attached so its resources come from nexus0. In practice, this isn't 513 * a problem but should be addressed eventually. 514 */ 515 acpi_ec_ecdt_probe(dev); 516 517 /* Bring device objects and regions online. */ 518 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 519 device_printf(dev, "Could not initialize ACPI objects: %s\n", 520 AcpiFormatException(status)); 521 goto out; 522 } 523 524 /* 525 * Setup our sysctl tree. 526 * 527 * XXX: This doesn't check to make sure that none of these fail. 528 */ 529 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 530 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 531 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 532 device_get_name(dev), CTLFLAG_RD, 0, ""); 533 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 534 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 535 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 536 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 537 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 538 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 539 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 540 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 541 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 542 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 543 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 544 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 545 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 546 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 547 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 548 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 549 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 550 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 551 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 552 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 553 "sleep delay"); 554 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 555 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 556 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 557 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 558 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 559 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 560 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 561 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 562 OID_AUTO, "handle_reboot", CTLFLAG_RW, 563 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 564 565 /* 566 * Default to 1 second before sleeping to give some machines time to 567 * stabilize. 568 */ 569 sc->acpi_sleep_delay = 1; 570 if (bootverbose) 571 sc->acpi_verbose = 1; 572 if ((env = getenv("hw.acpi.verbose")) != NULL) { 573 if (strcmp(env, "0") != 0) 574 sc->acpi_verbose = 1; 575 freeenv(env); 576 } 577 578 /* Only enable S4BIOS by default if the FACS says it is available. */ 579 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 580 if (ACPI_FAILURE(status)) { 581 device_printf(dev, "couldn't get FACS: %s\n", 582 AcpiFormatException(status)); 583 error = ENXIO; 584 goto out; 585 } 586 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 587 sc->acpi_s4bios = 1; 588 589 /* 590 * Dispatch the default sleep state to devices. The lid switch is set 591 * to NONE by default to avoid surprising users. 592 */ 593 sc->acpi_power_button_sx = ACPI_STATE_S5; 594 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 595 sc->acpi_standby_sx = ACPI_STATE_S1; 596 sc->acpi_suspend_sx = ACPI_STATE_S3; 597 598 /* Pick the first valid sleep state for the sleep button default. */ 599 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 600 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 601 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 602 sc->acpi_sleep_button_sx = state; 603 break; 604 } 605 606 acpi_enable_fixed_events(sc); 607 608 /* 609 * Scan the namespace and attach/initialise children. 610 */ 611 612 /* Register our shutdown handler. */ 613 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 614 SHUTDOWN_PRI_LAST); 615 616 /* 617 * Register our acpi event handlers. 618 * XXX should be configurable eg. via userland policy manager. 619 */ 620 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 621 sc, ACPI_EVENT_PRI_LAST); 622 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 623 sc, ACPI_EVENT_PRI_LAST); 624 625 /* Flag our initial states. */ 626 sc->acpi_enabled = 1; 627 sc->acpi_sstate = ACPI_STATE_S0; 628 sc->acpi_sleep_disabled = 0; 629 630 /* Create the control device */ 631 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 632 "acpi"); 633 sc->acpi_dev_t->si_drv1 = sc; 634 635 if ((error = acpi_machdep_init(dev))) 636 goto out; 637 638 /* Register ACPI again to pass the correct argument of pm_func. */ 639 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 640 641 if (!acpi_disabled("bus")) 642 acpi_probe_children(dev); 643 644 error = 0; 645 646 out: 647 return_VALUE (error); 648} 649 650static int 651acpi_suspend(device_t dev) 652{ 653 device_t child, *devlist; 654 int error, i, numdevs, pstate; 655 656 GIANT_REQUIRED; 657 658 /* First give child devices a chance to suspend. */ 659 error = bus_generic_suspend(dev); 660 if (error) 661 return (error); 662 663 /* 664 * Now, set them into the appropriate power state, usually D3. If the 665 * device has an _SxD method for the next sleep state, use that power 666 * state instead. 667 */ 668 error = device_get_children(dev, &devlist, &numdevs); 669 if (error) 670 return (error); 671 for (i = 0; i < numdevs; i++) { 672 /* If the device is not attached, we've powered it down elsewhere. */ 673 child = devlist[i]; 674 if (!device_is_attached(child)) 675 continue; 676 677 /* 678 * Default to D3 for all sleep states. The _SxD method is optional 679 * so set the powerstate even if it's absent. 680 */ 681 pstate = PCI_POWERSTATE_D3; 682 error = acpi_device_pwr_for_sleep(device_get_parent(child), 683 child, &pstate); 684 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 685 pci_set_powerstate(child, pstate); 686 } 687 free(devlist, M_TEMP); 688 error = 0; 689 690 return (error); 691} 692 693static int 694acpi_resume(device_t dev) 695{ 696 ACPI_HANDLE handle; 697 int i, numdevs, error; 698 device_t child, *devlist; 699 700 GIANT_REQUIRED; 701 702 /* 703 * Put all devices in D0 before resuming them. Call _S0D on each one 704 * since some systems expect this. 705 */ 706 error = device_get_children(dev, &devlist, &numdevs); 707 if (error) 708 return (error); 709 for (i = 0; i < numdevs; i++) { 710 child = devlist[i]; 711 handle = acpi_get_handle(child); 712 if (handle) 713 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 714 if (device_is_attached(child) && acpi_do_powerstate) 715 pci_set_powerstate(child, PCI_POWERSTATE_D0); 716 } 717 free(devlist, M_TEMP); 718 719 return (bus_generic_resume(dev)); 720} 721 722static int 723acpi_shutdown(device_t dev) 724{ 725 726 GIANT_REQUIRED; 727 728 /* Allow children to shutdown first. */ 729 bus_generic_shutdown(dev); 730 731 /* 732 * Enable any GPEs that are able to power-on the system (i.e., RTC). 733 * Also, disable any that are not valid for this state (most). 734 */ 735 acpi_wake_prep_walk(ACPI_STATE_S5); 736 737 return (0); 738} 739 740/* 741 * Handle a new device being added 742 */ 743static device_t 744acpi_add_child(device_t bus, int order, const char *name, int unit) 745{ 746 struct acpi_device *ad; 747 device_t child; 748 749 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 750 return (NULL); 751 752 resource_list_init(&ad->ad_rl); 753 754 child = device_add_child_ordered(bus, order, name, unit); 755 if (child != NULL) 756 device_set_ivars(child, ad); 757 else 758 free(ad, M_ACPIDEV); 759 return (child); 760} 761 762static int 763acpi_print_child(device_t bus, device_t child) 764{ 765 struct acpi_device *adev = device_get_ivars(child); 766 struct resource_list *rl = &adev->ad_rl; 767 int retval = 0; 768 769 retval += bus_print_child_header(bus, child); 770 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 771 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 772 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 773 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 774 if (device_get_flags(child)) 775 retval += printf(" flags %#x", device_get_flags(child)); 776 retval += bus_print_child_footer(bus, child); 777 778 return (retval); 779} 780 781/* 782 * If this device is an ACPI child but no one claimed it, attempt 783 * to power it off. We'll power it back up when a driver is added. 784 * 785 * XXX Disabled for now since many necessary devices (like fdc and 786 * ATA) don't claim the devices we created for them but still expect 787 * them to be powered up. 788 */ 789static void 790acpi_probe_nomatch(device_t bus, device_t child) 791{ 792 793 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 794} 795 796/* 797 * If a new driver has a chance to probe a child, first power it up. 798 * 799 * XXX Disabled for now (see acpi_probe_nomatch for details). 800 */ 801static void 802acpi_driver_added(device_t dev, driver_t *driver) 803{ 804 device_t child, *devlist; 805 int i, numdevs; 806 807 DEVICE_IDENTIFY(driver, dev); 808 if (device_get_children(dev, &devlist, &numdevs)) 809 return; 810 for (i = 0; i < numdevs; i++) { 811 child = devlist[i]; 812 if (device_get_state(child) == DS_NOTPRESENT) { 813 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 814 if (device_probe_and_attach(child) != 0) 815 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 816 } 817 } 818 free(devlist, M_TEMP); 819} 820 821/* Location hint for devctl(8) */ 822static int 823acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 824 size_t buflen) 825{ 826 struct acpi_device *dinfo = device_get_ivars(child); 827 828 if (dinfo->ad_handle) 829 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 830 else 831 snprintf(buf, buflen, "unknown"); 832 return (0); 833} 834 835/* PnP information for devctl(8) */ 836static int 837acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 838 size_t buflen) 839{ 840 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 841 ACPI_DEVICE_INFO *adinfo; 842 struct acpi_device *dinfo = device_get_ivars(child); 843 char *end; 844 int error; 845 846 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 847 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 848 if (error) 849 snprintf(buf, buflen, "unknown"); 850 else 851 snprintf(buf, buflen, "_HID=%s _UID=%lu", 852 (adinfo->Valid & ACPI_VALID_HID) ? 853 adinfo->HardwareId.Value : "none", 854 (adinfo->Valid & ACPI_VALID_UID) ? 855 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 856 if (adinfo) 857 AcpiOsFree(adinfo); 858 859 return (0); 860} 861 862/* 863 * Handle per-device ivars 864 */ 865static int 866acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 867{ 868 struct acpi_device *ad; 869 870 if ((ad = device_get_ivars(child)) == NULL) { 871 printf("device has no ivars\n"); 872 return (ENOENT); 873 } 874 875 /* ACPI and ISA compatibility ivars */ 876 switch(index) { 877 case ACPI_IVAR_HANDLE: 878 *(ACPI_HANDLE *)result = ad->ad_handle; 879 break; 880 case ACPI_IVAR_MAGIC: 881 *(uintptr_t *)result = ad->ad_magic; 882 break; 883 case ACPI_IVAR_PRIVATE: 884 *(void **)result = ad->ad_private; 885 break; 886 case ACPI_IVAR_FLAGS: 887 *(int *)result = ad->ad_flags; 888 break; 889 case ISA_IVAR_VENDORID: 890 case ISA_IVAR_SERIAL: 891 case ISA_IVAR_COMPATID: 892 *(int *)result = -1; 893 break; 894 case ISA_IVAR_LOGICALID: 895 *(int *)result = acpi_isa_get_logicalid(child); 896 break; 897 default: 898 return (ENOENT); 899 } 900 901 return (0); 902} 903 904static int 905acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 906{ 907 struct acpi_device *ad; 908 909 if ((ad = device_get_ivars(child)) == NULL) { 910 printf("device has no ivars\n"); 911 return (ENOENT); 912 } 913 914 switch(index) { 915 case ACPI_IVAR_HANDLE: 916 ad->ad_handle = (ACPI_HANDLE)value; 917 break; 918 case ACPI_IVAR_MAGIC: 919 ad->ad_magic = (uintptr_t)value; 920 break; 921 case ACPI_IVAR_PRIVATE: 922 ad->ad_private = (void *)value; 923 break; 924 case ACPI_IVAR_FLAGS: 925 ad->ad_flags = (int)value; 926 break; 927 default: 928 panic("bad ivar write request (%d)", index); 929 return (ENOENT); 930 } 931 932 return (0); 933} 934 935/* 936 * Handle child resource allocation/removal 937 */ 938static struct resource_list * 939acpi_get_rlist(device_t dev, device_t child) 940{ 941 struct acpi_device *ad; 942 943 ad = device_get_ivars(child); 944 return (&ad->ad_rl); 945} 946 947/* 948 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 949 * duplicates, we merge any in the sysresource attach routine. 950 */ 951static int 952acpi_sysres_alloc(device_t dev) 953{ 954 struct resource *res; 955 struct resource_list *rl; 956 struct resource_list_entry *rle; 957 struct rman *rm; 958 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 959 device_t *children; 960 int child_count, i; 961 962 /* 963 * Probe/attach any sysresource devices. This would be unnecessary if we 964 * had multi-pass probe/attach. 965 */ 966 if (device_get_children(dev, &children, &child_count) != 0) 967 return (ENXIO); 968 for (i = 0; i < child_count; i++) { 969 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 970 device_probe_and_attach(children[i]); 971 } 972 free(children, M_TEMP); 973 974 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 975 STAILQ_FOREACH(rle, rl, link) { 976 if (rle->res != NULL) { 977 device_printf(dev, "duplicate resource for %lx\n", rle->start); 978 continue; 979 } 980 981 /* Only memory and IO resources are valid here. */ 982 switch (rle->type) { 983 case SYS_RES_IOPORT: 984 rm = &acpi_rman_io; 985 break; 986 case SYS_RES_MEMORY: 987 rm = &acpi_rman_mem; 988 break; 989 default: 990 continue; 991 } 992 993 /* Pre-allocate resource and add to our rman pool. */ 994 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 995 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 996 if (res != NULL) { 997 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 998 rle->res = res; 999 } else 1000 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1001 rle->start, rle->count, rle->type); 1002 } 1003 return (0); 1004} 1005 1006static struct resource * 1007acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1008 u_long start, u_long end, u_long count, u_int flags) 1009{ 1010 ACPI_RESOURCE ares; 1011 struct acpi_device *ad = device_get_ivars(child); 1012 struct resource_list *rl = &ad->ad_rl; 1013 struct resource_list_entry *rle; 1014 struct resource *res; 1015 struct rman *rm; 1016 1017 res = NULL; 1018 1019 /* We only handle memory and IO resources through rman. */ 1020 switch (type) { 1021 case SYS_RES_IOPORT: 1022 rm = &acpi_rman_io; 1023 break; 1024 case SYS_RES_MEMORY: 1025 rm = &acpi_rman_mem; 1026 break; 1027 default: 1028 rm = NULL; 1029 } 1030 1031 ACPI_SERIAL_BEGIN(acpi); 1032 1033 /* 1034 * If this is an allocation of the "default" range for a given RID, and 1035 * we know what the resources for this device are (i.e., they're on the 1036 * child's resource list), use those start/end values. 1037 */ 1038 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1039 rle = resource_list_find(rl, type, *rid); 1040 if (rle == NULL) 1041 goto out; 1042 start = rle->start; 1043 end = rle->end; 1044 count = rle->count; 1045 } 1046 1047 /* 1048 * If this is an allocation of a specific range, see if we can satisfy 1049 * the request from our system resource regions. If we can't, pass the 1050 * request up to the parent. 1051 */ 1052 if (start + count - 1 == end && rm != NULL) 1053 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1054 child); 1055 if (res == NULL) { 1056 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1057 start, end, count, flags); 1058 } else { 1059 rman_set_rid(res, *rid); 1060 1061 /* If requested, activate the resource using the parent's method. */ 1062 if (flags & RF_ACTIVE) 1063 if (bus_activate_resource(child, type, *rid, res) != 0) { 1064 rman_release_resource(res); 1065 res = NULL; 1066 goto out; 1067 } 1068 } 1069 1070 if (res != NULL && device_get_parent(child) == bus) 1071 switch (type) { 1072 case SYS_RES_IRQ: 1073 /* 1074 * Since bus_config_intr() takes immediate effect, we cannot 1075 * configure the interrupt associated with a device when we 1076 * parse the resources but have to defer it until a driver 1077 * actually allocates the interrupt via bus_alloc_resource(). 1078 * 1079 * XXX: Should we handle the lookup failing? 1080 */ 1081 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1082 acpi_config_intr(child, &ares); 1083 break; 1084 } 1085 1086out: 1087 ACPI_SERIAL_END(acpi); 1088 return (res); 1089} 1090 1091static int 1092acpi_release_resource(device_t bus, device_t child, int type, int rid, 1093 struct resource *r) 1094{ 1095 struct rman *rm; 1096 int ret; 1097 1098 /* We only handle memory and IO resources through rman. */ 1099 switch (type) { 1100 case SYS_RES_IOPORT: 1101 rm = &acpi_rman_io; 1102 break; 1103 case SYS_RES_MEMORY: 1104 rm = &acpi_rman_mem; 1105 break; 1106 default: 1107 rm = NULL; 1108 } 1109 1110 ACPI_SERIAL_BEGIN(acpi); 1111 1112 /* 1113 * If this resource belongs to one of our internal managers, 1114 * deactivate it and release it to the local pool. If it doesn't, 1115 * pass this request up to the parent. 1116 */ 1117 if (rm != NULL && rman_is_region_manager(r, rm)) { 1118 if (rman_get_flags(r) & RF_ACTIVE) { 1119 ret = bus_deactivate_resource(child, type, rid, r); 1120 if (ret != 0) 1121 goto out; 1122 } 1123 ret = rman_release_resource(r); 1124 } else 1125 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1126 1127out: 1128 ACPI_SERIAL_END(acpi); 1129 return (ret); 1130} 1131 1132static void 1133acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1134{ 1135 struct resource_list *rl; 1136 1137 rl = acpi_get_rlist(bus, child); 1138 resource_list_delete(rl, type, rid); 1139} 1140 1141/* Allocate an IO port or memory resource, given its GAS. */ 1142int 1143acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1144 struct resource **res, u_int flags) 1145{ 1146 int error, res_type; 1147 1148 error = ENOMEM; 1149 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1150 return (EINVAL); 1151 1152 /* We only support memory and IO spaces. */ 1153 switch (gas->SpaceId) { 1154 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1155 res_type = SYS_RES_MEMORY; 1156 break; 1157 case ACPI_ADR_SPACE_SYSTEM_IO: 1158 res_type = SYS_RES_IOPORT; 1159 break; 1160 default: 1161 return (EOPNOTSUPP); 1162 } 1163 1164 /* 1165 * If the register width is less than 8, assume the BIOS author means 1166 * it is a bit field and just allocate a byte. 1167 */ 1168 if (gas->BitWidth && gas->BitWidth < 8) 1169 gas->BitWidth = 8; 1170 1171 /* Validate the address after we're sure we support the space. */ 1172 if (gas->Address == 0 || gas->BitWidth == 0) 1173 return (EINVAL); 1174 1175 bus_set_resource(dev, res_type, *rid, gas->Address, 1176 gas->BitWidth / 8); 1177 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1178 if (*res != NULL) { 1179 *type = res_type; 1180 error = 0; 1181 } else 1182 bus_delete_resource(dev, res_type, *rid); 1183 1184 return (error); 1185} 1186 1187/* Probe _HID and _CID for compatible ISA PNP ids. */ 1188static uint32_t 1189acpi_isa_get_logicalid(device_t dev) 1190{ 1191 ACPI_DEVICE_INFO *devinfo; 1192 ACPI_BUFFER buf; 1193 ACPI_HANDLE h; 1194 ACPI_STATUS error; 1195 u_int32_t pnpid; 1196 1197 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1198 1199 pnpid = 0; 1200 buf.Pointer = NULL; 1201 buf.Length = ACPI_ALLOCATE_BUFFER; 1202 1203 /* Fetch and validate the HID. */ 1204 if ((h = acpi_get_handle(dev)) == NULL) 1205 goto out; 1206 error = AcpiGetObjectInfo(h, &buf); 1207 if (ACPI_FAILURE(error)) 1208 goto out; 1209 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1210 1211 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1212 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1213 1214out: 1215 if (buf.Pointer != NULL) 1216 AcpiOsFree(buf.Pointer); 1217 return_VALUE (pnpid); 1218} 1219 1220static int 1221acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1222{ 1223 ACPI_DEVICE_INFO *devinfo; 1224 ACPI_BUFFER buf; 1225 ACPI_HANDLE h; 1226 ACPI_STATUS error; 1227 uint32_t *pnpid; 1228 int valid, i; 1229 1230 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1231 1232 pnpid = cids; 1233 valid = 0; 1234 buf.Pointer = NULL; 1235 buf.Length = ACPI_ALLOCATE_BUFFER; 1236 1237 /* Fetch and validate the CID */ 1238 if ((h = acpi_get_handle(dev)) == NULL) 1239 goto out; 1240 error = AcpiGetObjectInfo(h, &buf); 1241 if (ACPI_FAILURE(error)) 1242 goto out; 1243 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1244 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1245 goto out; 1246 1247 if (devinfo->CompatibilityId.Count < count) 1248 count = devinfo->CompatibilityId.Count; 1249 for (i = 0; i < count; i++) { 1250 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1251 continue; 1252 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1253 valid++; 1254 } 1255 1256out: 1257 if (buf.Pointer != NULL) 1258 AcpiOsFree(buf.Pointer); 1259 return_VALUE (valid); 1260} 1261 1262static char * 1263acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1264{ 1265 ACPI_HANDLE h; 1266 int i; 1267 1268 h = acpi_get_handle(dev); 1269 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1270 return (NULL); 1271 1272 /* Try to match one of the array of IDs with a HID or CID. */ 1273 for (i = 0; ids[i] != NULL; i++) { 1274 if (acpi_MatchHid(h, ids[i])) 1275 return (ids[i]); 1276 } 1277 return (NULL); 1278} 1279 1280static ACPI_STATUS 1281acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1282 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1283{ 1284 ACPI_HANDLE h; 1285 1286 if (dev == NULL) 1287 h = ACPI_ROOT_OBJECT; 1288 else if ((h = acpi_get_handle(dev)) == NULL) 1289 return (AE_BAD_PARAMETER); 1290 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1291} 1292 1293static int 1294acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1295{ 1296 struct acpi_softc *sc; 1297 ACPI_HANDLE handle; 1298 ACPI_STATUS status; 1299 char sxd[8]; 1300 int error; 1301 1302 sc = device_get_softc(bus); 1303 handle = acpi_get_handle(dev); 1304 1305 /* 1306 * XXX If we find these devices, don't try to power them down. 1307 * The serial and IRDA ports on my T23 hang the system when 1308 * set to D3 and it appears that such legacy devices may 1309 * need special handling in their drivers. 1310 */ 1311 if (handle == NULL || 1312 acpi_MatchHid(handle, "PNP0500") || 1313 acpi_MatchHid(handle, "PNP0501") || 1314 acpi_MatchHid(handle, "PNP0502") || 1315 acpi_MatchHid(handle, "PNP0510") || 1316 acpi_MatchHid(handle, "PNP0511")) 1317 return (ENXIO); 1318 1319 /* 1320 * Override next state with the value from _SxD, if present. If no 1321 * dstate argument was provided, don't fetch the return value. 1322 */ 1323 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1324 if (dstate) 1325 status = acpi_GetInteger(handle, sxd, dstate); 1326 else 1327 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1328 1329 switch (status) { 1330 case AE_OK: 1331 error = 0; 1332 break; 1333 case AE_NOT_FOUND: 1334 error = ESRCH; 1335 break; 1336 default: 1337 error = ENXIO; 1338 break; 1339 } 1340 1341 return (error); 1342} 1343 1344/* Callback arg for our implementation of walking the namespace. */ 1345struct acpi_device_scan_ctx { 1346 acpi_scan_cb_t user_fn; 1347 void *arg; 1348 ACPI_HANDLE parent; 1349}; 1350 1351static ACPI_STATUS 1352acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1353{ 1354 struct acpi_device_scan_ctx *ctx; 1355 device_t dev, old_dev; 1356 ACPI_STATUS status; 1357 ACPI_OBJECT_TYPE type; 1358 1359 /* 1360 * Skip this device if we think we'll have trouble with it or it is 1361 * the parent where the scan began. 1362 */ 1363 ctx = (struct acpi_device_scan_ctx *)arg; 1364 if (acpi_avoid(h) || h == ctx->parent) 1365 return (AE_OK); 1366 1367 /* If this is not a valid device type (e.g., a method), skip it. */ 1368 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1369 return (AE_OK); 1370 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1371 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1372 return (AE_OK); 1373 1374 /* 1375 * Call the user function with the current device. If it is unchanged 1376 * afterwards, return. Otherwise, we update the handle to the new dev. 1377 */ 1378 old_dev = acpi_get_device(h); 1379 dev = old_dev; 1380 status = ctx->user_fn(h, &dev, level, ctx->arg); 1381 if (ACPI_FAILURE(status) || old_dev == dev) 1382 return (status); 1383 1384 /* Remove the old child and its connection to the handle. */ 1385 if (old_dev != NULL) { 1386 device_delete_child(device_get_parent(old_dev), old_dev); 1387 AcpiDetachData(h, acpi_fake_objhandler); 1388 } 1389 1390 /* Recreate the handle association if the user created a device. */ 1391 if (dev != NULL) 1392 AcpiAttachData(h, acpi_fake_objhandler, dev); 1393 1394 return (AE_OK); 1395} 1396 1397static ACPI_STATUS 1398acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1399 acpi_scan_cb_t user_fn, void *arg) 1400{ 1401 ACPI_HANDLE h; 1402 struct acpi_device_scan_ctx ctx; 1403 1404 if (acpi_disabled("children")) 1405 return (AE_OK); 1406 1407 if (dev == NULL) 1408 h = ACPI_ROOT_OBJECT; 1409 else if ((h = acpi_get_handle(dev)) == NULL) 1410 return (AE_BAD_PARAMETER); 1411 ctx.user_fn = user_fn; 1412 ctx.arg = arg; 1413 ctx.parent = h; 1414 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1415 acpi_device_scan_cb, &ctx, NULL)); 1416} 1417 1418/* 1419 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1420 * device power states since it's close enough to ACPI. 1421 */ 1422static int 1423acpi_set_powerstate_method(device_t bus, device_t child, int state) 1424{ 1425 ACPI_HANDLE h; 1426 ACPI_STATUS status; 1427 int error; 1428 1429 error = 0; 1430 h = acpi_get_handle(child); 1431 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1432 return (EINVAL); 1433 if (h == NULL) 1434 return (0); 1435 1436 /* Ignore errors if the power methods aren't present. */ 1437 status = acpi_pwr_switch_consumer(h, state); 1438 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1439 && status != AE_BAD_PARAMETER) 1440 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1441 state, acpi_name(h), AcpiFormatException(status)); 1442 1443 return (error); 1444} 1445 1446static int 1447acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1448{ 1449 int result, cid_count, i; 1450 uint32_t lid, cids[8]; 1451 1452 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1453 1454 /* 1455 * ISA-style drivers attached to ACPI may persist and 1456 * probe manually if we return ENOENT. We never want 1457 * that to happen, so don't ever return it. 1458 */ 1459 result = ENXIO; 1460 1461 /* Scan the supplied IDs for a match */ 1462 lid = acpi_isa_get_logicalid(child); 1463 cid_count = acpi_isa_get_compatid(child, cids, 8); 1464 while (ids && ids->ip_id) { 1465 if (lid == ids->ip_id) { 1466 result = 0; 1467 goto out; 1468 } 1469 for (i = 0; i < cid_count; i++) { 1470 if (cids[i] == ids->ip_id) { 1471 result = 0; 1472 goto out; 1473 } 1474 } 1475 ids++; 1476 } 1477 1478 out: 1479 if (result == 0 && ids->ip_desc) 1480 device_set_desc(child, ids->ip_desc); 1481 1482 return_VALUE (result); 1483} 1484 1485#if defined(__i386__) || defined(__amd64__) 1486/* 1487 * Look for a MCFG table. If it is present, use the settings for 1488 * domain (segment) 0 to setup PCI config space access via the memory 1489 * map. 1490 */ 1491static void 1492acpi_enable_pcie(void) 1493{ 1494 ACPI_TABLE_HEADER *hdr; 1495 ACPI_MCFG_ALLOCATION *alloc, *end; 1496 ACPI_STATUS status; 1497 1498 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1499 if (ACPI_FAILURE(status)) 1500 return; 1501 1502 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1503 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1504 while (alloc < end) { 1505 if (alloc->PciSegment == 0) { 1506 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1507 alloc->EndBusNumber); 1508 return; 1509 } 1510 alloc++; 1511 } 1512} 1513#endif 1514 1515/* 1516 * Scan all of the ACPI namespace and attach child devices. 1517 * 1518 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1519 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1520 * However, in violation of the spec, some systems place their PCI link 1521 * devices in \, so we have to walk the whole namespace. We check the 1522 * type of namespace nodes, so this should be ok. 1523 */ 1524static void 1525acpi_probe_children(device_t bus) 1526{ 1527 1528 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1529 1530 /* 1531 * Scan the namespace and insert placeholders for all the devices that 1532 * we find. We also probe/attach any early devices. 1533 * 1534 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1535 * we want to create nodes for all devices, not just those that are 1536 * currently present. (This assumes that we don't want to create/remove 1537 * devices as they appear, which might be smarter.) 1538 */ 1539 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1540 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1541 bus, NULL); 1542 1543 /* Pre-allocate resources for our rman from any sysresource devices. */ 1544 acpi_sysres_alloc(bus); 1545 1546 /* Create any static children by calling device identify methods. */ 1547 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1548 bus_generic_probe(bus); 1549 1550 /* Probe/attach all children, created staticly and from the namespace. */ 1551 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1552 bus_generic_attach(bus); 1553 1554 /* 1555 * Some of these children may have attached others as part of their attach 1556 * process (eg. the root PCI bus driver), so rescan. 1557 */ 1558 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1559 bus_generic_attach(bus); 1560 1561 /* Attach wake sysctls. */ 1562 acpi_wake_sysctl_walk(bus); 1563 1564 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1565 return_VOID; 1566} 1567 1568/* 1569 * Determine the probe order for a given device. 1570 */ 1571static void 1572acpi_probe_order(ACPI_HANDLE handle, int *order) 1573{ 1574 ACPI_OBJECT_TYPE type; 1575 1576 /* 1577 * 1. I/O port and memory system resource holders 1578 * 2. Embedded controllers (to handle early accesses) 1579 * 3. PCI Link Devices 1580 * 100000. CPUs 1581 */ 1582 AcpiGetType(handle, &type); 1583 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1584 *order = 1; 1585 else if (acpi_MatchHid(handle, "PNP0C09")) 1586 *order = 2; 1587 else if (acpi_MatchHid(handle, "PNP0C0F")) 1588 *order = 3; 1589 else if (type == ACPI_TYPE_PROCESSOR) 1590 *order = 100000; 1591} 1592 1593/* 1594 * Evaluate a child device and determine whether we might attach a device to 1595 * it. 1596 */ 1597static ACPI_STATUS 1598acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1599{ 1600 ACPI_OBJECT_TYPE type; 1601 ACPI_HANDLE h; 1602 device_t bus, child; 1603 int order; 1604 char *handle_str, **search; 1605 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1606 1607 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1608 1609 /* Skip this device if we think we'll have trouble with it. */ 1610 if (acpi_avoid(handle)) 1611 return_ACPI_STATUS (AE_OK); 1612 1613 bus = (device_t)context; 1614 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1615 switch (type) { 1616 case ACPI_TYPE_DEVICE: 1617 case ACPI_TYPE_PROCESSOR: 1618 case ACPI_TYPE_THERMAL: 1619 case ACPI_TYPE_POWER: 1620 if (acpi_disabled("children")) 1621 break; 1622 1623 /* 1624 * Since we scan from \, be sure to skip system scope objects. 1625 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1626 */ 1627 handle_str = acpi_name(handle); 1628 for (search = scopes; *search != NULL; search++) { 1629 if (strcmp(handle_str, *search) == 0) 1630 break; 1631 } 1632 if (*search != NULL) 1633 break; 1634 1635 /* 1636 * Create a placeholder device for this node. Sort the 1637 * placeholder so that the probe/attach passes will run 1638 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1639 * are reserved for special objects (i.e., system 1640 * resources). CPU devices have a very high order to 1641 * ensure they are probed after other devices. 1642 */ 1643 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1644 order = level * 10 + 100; 1645 acpi_probe_order(handle, &order); 1646 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1647 if (child == NULL) 1648 break; 1649 1650 /* Associate the handle with the device_t and vice versa. */ 1651 acpi_set_handle(child, handle); 1652 AcpiAttachData(handle, acpi_fake_objhandler, child); 1653 1654 /* 1655 * Check that the device is present. If it's not present, 1656 * leave it disabled (so that we have a device_t attached to 1657 * the handle, but we don't probe it). 1658 * 1659 * XXX PCI link devices sometimes report "present" but not 1660 * "functional" (i.e. if disabled). Go ahead and probe them 1661 * anyway since we may enable them later. 1662 */ 1663 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1664 /* Never disable PCI link devices. */ 1665 if (acpi_MatchHid(handle, "PNP0C0F")) 1666 break; 1667 /* 1668 * Docking stations should remain enabled since the system 1669 * may be undocked at boot. 1670 */ 1671 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1672 break; 1673 1674 device_disable(child); 1675 break; 1676 } 1677 1678 /* 1679 * Get the device's resource settings and attach them. 1680 * Note that if the device has _PRS but no _CRS, we need 1681 * to decide when it's appropriate to try to configure the 1682 * device. Ignore the return value here; it's OK for the 1683 * device not to have any resources. 1684 */ 1685 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1686 break; 1687 } 1688 } 1689 1690 return_ACPI_STATUS (AE_OK); 1691} 1692 1693/* 1694 * AcpiAttachData() requires an object handler but never uses it. This is a 1695 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1696 */ 1697void 1698acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1699{ 1700} 1701 1702static void 1703acpi_shutdown_final(void *arg, int howto) 1704{ 1705 struct acpi_softc *sc; 1706 ACPI_STATUS status; 1707 1708 /* 1709 * XXX Shutdown code should only run on the BSP (cpuid 0). 1710 * Some chipsets do not power off the system correctly if called from 1711 * an AP. 1712 */ 1713 sc = arg; 1714 if ((howto & RB_POWEROFF) != 0) { 1715 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1716 if (ACPI_FAILURE(status)) { 1717 printf("AcpiEnterSleepStatePrep failed - %s\n", 1718 AcpiFormatException(status)); 1719 return; 1720 } 1721 printf("Powering system off using ACPI\n"); 1722 ACPI_DISABLE_IRQS(); 1723 status = AcpiEnterSleepState(ACPI_STATE_S5); 1724 if (ACPI_FAILURE(status)) { 1725 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1726 } else { 1727 DELAY(1000000); 1728 printf("ACPI power-off failed - timeout\n"); 1729 } 1730 } else if ((howto & RB_HALT) == 0 && 1731 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1732 sc->acpi_handle_reboot) { 1733 /* Reboot using the reset register. */ 1734 status = AcpiHwLowLevelWrite( 1735 AcpiGbl_FADT.ResetRegister.BitWidth, 1736 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1737 if (ACPI_FAILURE(status)) { 1738 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1739 } else { 1740 DELAY(1000000); 1741 printf("ACPI reset failed - timeout\n"); 1742 } 1743 } else if (sc->acpi_do_disable && panicstr == NULL) { 1744 /* 1745 * Only disable ACPI if the user requested. On some systems, writing 1746 * the disable value to SMI_CMD hangs the system. 1747 */ 1748 printf("Shutting down ACPI\n"); 1749 AcpiTerminate(); 1750 } 1751} 1752 1753static void 1754acpi_enable_fixed_events(struct acpi_softc *sc) 1755{ 1756 static int first_time = 1; 1757 1758 /* Enable and clear fixed events and install handlers. */ 1759 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1760 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1761 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1762 acpi_event_power_button_sleep, sc); 1763 if (first_time) 1764 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1765 } 1766 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1767 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1768 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1769 acpi_event_sleep_button_sleep, sc); 1770 if (first_time) 1771 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1772 } 1773 1774 first_time = 0; 1775} 1776 1777/* 1778 * Returns true if the device is actually present and should 1779 * be attached to. This requires the present, enabled, UI-visible 1780 * and diagnostics-passed bits to be set. 1781 */ 1782BOOLEAN 1783acpi_DeviceIsPresent(device_t dev) 1784{ 1785 ACPI_DEVICE_INFO *devinfo; 1786 ACPI_HANDLE h; 1787 ACPI_BUFFER buf; 1788 ACPI_STATUS error; 1789 int ret; 1790 1791 ret = FALSE; 1792 if ((h = acpi_get_handle(dev)) == NULL) 1793 return (FALSE); 1794 buf.Pointer = NULL; 1795 buf.Length = ACPI_ALLOCATE_BUFFER; 1796 error = AcpiGetObjectInfo(h, &buf); 1797 if (ACPI_FAILURE(error)) 1798 return (FALSE); 1799 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1800 1801 /* If no _STA method, must be present */ 1802 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1803 ret = TRUE; 1804 1805 /* Return true for 'present' and 'functioning' */ 1806 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1807 ret = TRUE; 1808 1809 AcpiOsFree(buf.Pointer); 1810 return (ret); 1811} 1812 1813/* 1814 * Returns true if the battery is actually present and inserted. 1815 */ 1816BOOLEAN 1817acpi_BatteryIsPresent(device_t dev) 1818{ 1819 ACPI_DEVICE_INFO *devinfo; 1820 ACPI_HANDLE h; 1821 ACPI_BUFFER buf; 1822 ACPI_STATUS error; 1823 int ret; 1824 1825 ret = FALSE; 1826 if ((h = acpi_get_handle(dev)) == NULL) 1827 return (FALSE); 1828 buf.Pointer = NULL; 1829 buf.Length = ACPI_ALLOCATE_BUFFER; 1830 error = AcpiGetObjectInfo(h, &buf); 1831 if (ACPI_FAILURE(error)) 1832 return (FALSE); 1833 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1834 1835 /* If no _STA method, must be present */ 1836 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1837 ret = TRUE; 1838 1839 /* Return true for 'present', 'battery present', and 'functioning' */ 1840 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1841 ret = TRUE; 1842 1843 AcpiOsFree(buf.Pointer); 1844 return (ret); 1845} 1846 1847/* 1848 * Match a HID string against a handle 1849 */ 1850static BOOLEAN 1851acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1852{ 1853 ACPI_DEVICE_INFO *devinfo; 1854 ACPI_BUFFER buf; 1855 ACPI_STATUS error; 1856 int ret, i; 1857 1858 ret = FALSE; 1859 if (hid == NULL || h == NULL) 1860 return (ret); 1861 buf.Pointer = NULL; 1862 buf.Length = ACPI_ALLOCATE_BUFFER; 1863 error = AcpiGetObjectInfo(h, &buf); 1864 if (ACPI_FAILURE(error)) 1865 return (ret); 1866 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1867 1868 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1869 strcmp(hid, devinfo->HardwareId.Value) == 0) 1870 ret = TRUE; 1871 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1872 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1873 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1874 ret = TRUE; 1875 break; 1876 } 1877 } 1878 } 1879 1880 AcpiOsFree(buf.Pointer); 1881 return (ret); 1882} 1883 1884/* 1885 * Return the handle of a named object within our scope, ie. that of (parent) 1886 * or one if its parents. 1887 */ 1888ACPI_STATUS 1889acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1890{ 1891 ACPI_HANDLE r; 1892 ACPI_STATUS status; 1893 1894 /* Walk back up the tree to the root */ 1895 for (;;) { 1896 status = AcpiGetHandle(parent, path, &r); 1897 if (ACPI_SUCCESS(status)) { 1898 *result = r; 1899 return (AE_OK); 1900 } 1901 /* XXX Return error here? */ 1902 if (status != AE_NOT_FOUND) 1903 return (AE_OK); 1904 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1905 return (AE_NOT_FOUND); 1906 parent = r; 1907 } 1908} 1909 1910/* Find the difference between two PM tick counts. */ 1911uint32_t 1912acpi_TimerDelta(uint32_t end, uint32_t start) 1913{ 1914 uint32_t delta; 1915 1916 if (end >= start) 1917 delta = end - start; 1918 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1919 delta = ((0xFFFFFFFF - start) + end + 1); 1920 else 1921 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1922 return (delta); 1923} 1924 1925/* 1926 * Allocate a buffer with a preset data size. 1927 */ 1928ACPI_BUFFER * 1929acpi_AllocBuffer(int size) 1930{ 1931 ACPI_BUFFER *buf; 1932 1933 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1934 return (NULL); 1935 buf->Length = size; 1936 buf->Pointer = (void *)(buf + 1); 1937 return (buf); 1938} 1939 1940ACPI_STATUS 1941acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1942{ 1943 ACPI_OBJECT arg1; 1944 ACPI_OBJECT_LIST args; 1945 1946 arg1.Type = ACPI_TYPE_INTEGER; 1947 arg1.Integer.Value = number; 1948 args.Count = 1; 1949 args.Pointer = &arg1; 1950 1951 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1952} 1953 1954/* 1955 * Evaluate a path that should return an integer. 1956 */ 1957ACPI_STATUS 1958acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1959{ 1960 ACPI_STATUS status; 1961 ACPI_BUFFER buf; 1962 ACPI_OBJECT param; 1963 1964 if (handle == NULL) 1965 handle = ACPI_ROOT_OBJECT; 1966 1967 /* 1968 * Assume that what we've been pointed at is an Integer object, or 1969 * a method that will return an Integer. 1970 */ 1971 buf.Pointer = ¶m; 1972 buf.Length = sizeof(param); 1973 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1974 if (ACPI_SUCCESS(status)) { 1975 if (param.Type == ACPI_TYPE_INTEGER) 1976 *number = param.Integer.Value; 1977 else 1978 status = AE_TYPE; 1979 } 1980 1981 /* 1982 * In some applications, a method that's expected to return an Integer 1983 * may instead return a Buffer (probably to simplify some internal 1984 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1985 * convert it into an Integer as best we can. 1986 * 1987 * This is a hack. 1988 */ 1989 if (status == AE_BUFFER_OVERFLOW) { 1990 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1991 status = AE_NO_MEMORY; 1992 } else { 1993 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1994 if (ACPI_SUCCESS(status)) 1995 status = acpi_ConvertBufferToInteger(&buf, number); 1996 AcpiOsFree(buf.Pointer); 1997 } 1998 } 1999 return (status); 2000} 2001 2002ACPI_STATUS 2003acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2004{ 2005 ACPI_OBJECT *p; 2006 UINT8 *val; 2007 int i; 2008 2009 p = (ACPI_OBJECT *)bufp->Pointer; 2010 if (p->Type == ACPI_TYPE_INTEGER) { 2011 *number = p->Integer.Value; 2012 return (AE_OK); 2013 } 2014 if (p->Type != ACPI_TYPE_BUFFER) 2015 return (AE_TYPE); 2016 if (p->Buffer.Length > sizeof(int)) 2017 return (AE_BAD_DATA); 2018 2019 *number = 0; 2020 val = p->Buffer.Pointer; 2021 for (i = 0; i < p->Buffer.Length; i++) 2022 *number += val[i] << (i * 8); 2023 return (AE_OK); 2024} 2025 2026/* 2027 * Iterate over the elements of an a package object, calling the supplied 2028 * function for each element. 2029 * 2030 * XXX possible enhancement might be to abort traversal on error. 2031 */ 2032ACPI_STATUS 2033acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2034 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2035{ 2036 ACPI_OBJECT *comp; 2037 int i; 2038 2039 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2040 return (AE_BAD_PARAMETER); 2041 2042 /* Iterate over components */ 2043 i = 0; 2044 comp = pkg->Package.Elements; 2045 for (; i < pkg->Package.Count; i++, comp++) 2046 func(comp, arg); 2047 2048 return (AE_OK); 2049} 2050 2051/* 2052 * Find the (index)th resource object in a set. 2053 */ 2054ACPI_STATUS 2055acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2056{ 2057 ACPI_RESOURCE *rp; 2058 int i; 2059 2060 rp = (ACPI_RESOURCE *)buf->Pointer; 2061 i = index; 2062 while (i-- > 0) { 2063 /* Range check */ 2064 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2065 return (AE_BAD_PARAMETER); 2066 2067 /* Check for terminator */ 2068 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2069 return (AE_NOT_FOUND); 2070 rp = ACPI_NEXT_RESOURCE(rp); 2071 } 2072 if (resp != NULL) 2073 *resp = rp; 2074 2075 return (AE_OK); 2076} 2077 2078/* 2079 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2080 * 2081 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2082 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2083 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2084 * resources. 2085 */ 2086#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2087 2088ACPI_STATUS 2089acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2090{ 2091 ACPI_RESOURCE *rp; 2092 void *newp; 2093 2094 /* Initialise the buffer if necessary. */ 2095 if (buf->Pointer == NULL) { 2096 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2097 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2098 return (AE_NO_MEMORY); 2099 rp = (ACPI_RESOURCE *)buf->Pointer; 2100 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2101 rp->Length = 0; 2102 } 2103 if (res == NULL) 2104 return (AE_OK); 2105 2106 /* 2107 * Scan the current buffer looking for the terminator. 2108 * This will either find the terminator or hit the end 2109 * of the buffer and return an error. 2110 */ 2111 rp = (ACPI_RESOURCE *)buf->Pointer; 2112 for (;;) { 2113 /* Range check, don't go outside the buffer */ 2114 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2115 return (AE_BAD_PARAMETER); 2116 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2117 break; 2118 rp = ACPI_NEXT_RESOURCE(rp); 2119 } 2120 2121 /* 2122 * Check the size of the buffer and expand if required. 2123 * 2124 * Required size is: 2125 * size of existing resources before terminator + 2126 * size of new resource and header + 2127 * size of terminator. 2128 * 2129 * Note that this loop should really only run once, unless 2130 * for some reason we are stuffing a *really* huge resource. 2131 */ 2132 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2133 res->Length + ACPI_RS_SIZE_NO_DATA + 2134 ACPI_RS_SIZE_MIN) >= buf->Length) { 2135 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2136 return (AE_NO_MEMORY); 2137 bcopy(buf->Pointer, newp, buf->Length); 2138 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2139 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2140 AcpiOsFree(buf->Pointer); 2141 buf->Pointer = newp; 2142 buf->Length += buf->Length; 2143 } 2144 2145 /* Insert the new resource. */ 2146 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2147 2148 /* And add the terminator. */ 2149 rp = ACPI_NEXT_RESOURCE(rp); 2150 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2151 rp->Length = 0; 2152 2153 return (AE_OK); 2154} 2155 2156/* 2157 * Set interrupt model. 2158 */ 2159ACPI_STATUS 2160acpi_SetIntrModel(int model) 2161{ 2162 2163 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2164} 2165 2166/* 2167 * DEPRECATED. This interface has serious deficiencies and will be 2168 * removed. 2169 * 2170 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2171 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2172 */ 2173ACPI_STATUS 2174acpi_SetSleepState(struct acpi_softc *sc, int state) 2175{ 2176 static int once; 2177 2178 if (!once) { 2179 printf( 2180"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2181 once = 1; 2182 } 2183 return (acpi_EnterSleepState(sc, state)); 2184} 2185 2186static void 2187acpi_sleep_force(void *arg) 2188{ 2189 struct acpi_softc *sc; 2190 2191 printf("acpi: suspend request timed out, forcing sleep now\n"); 2192 sc = arg; 2193 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2194 printf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2195} 2196 2197/* 2198 * Request that the system enter the given suspend state. All /dev/apm 2199 * devices and devd(8) will be notified. Userland then has a chance to 2200 * save state and acknowledge the request. The system sleeps once all 2201 * acks are in. 2202 */ 2203int 2204acpi_ReqSleepState(struct acpi_softc *sc, int state) 2205{ 2206 struct apm_clone_data *clone; 2207 2208 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2209 return (EINVAL); 2210 2211 /* S5 (soft-off) should be entered directly with no waiting. */ 2212 if (state == ACPI_STATE_S5) { 2213 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2214 return (0); 2215 else 2216 return (ENXIO); 2217 } 2218 2219#if !defined(__i386__) 2220 /* This platform does not support acpi suspend/resume. */ 2221 return (EOPNOTSUPP); 2222#endif 2223 2224 /* If a suspend request is already in progress, just return. */ 2225 ACPI_LOCK(acpi); 2226 if (sc->acpi_next_sstate != 0) { 2227 ACPI_UNLOCK(acpi); 2228 return (0); 2229 } 2230 2231 /* Record the pending state and notify all apm devices. */ 2232 sc->acpi_next_sstate = state; 2233 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2234 clone->notify_status = APM_EV_NONE; 2235 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2236 selwakeuppri(&clone->sel_read, PZERO); 2237 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2238 } 2239 } 2240 2241 /* If devd(8) is not running, immediately enter the sleep state. */ 2242 if (devctl_process_running() == FALSE) { 2243 ACPI_UNLOCK(acpi); 2244 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2245 return (0); 2246 } else { 2247 return (ENXIO); 2248 } 2249 } 2250 2251 /* Now notify devd(8) also. */ 2252 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2253 2254 /* 2255 * Set a timeout to fire if userland doesn't ack the suspend request 2256 * in time. This way we still eventually go to sleep if we were 2257 * overheating or running low on battery, even if userland is hung. 2258 * We cancel this timeout once all userland acks are in or the 2259 * suspend request is aborted. 2260 */ 2261 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2262 ACPI_UNLOCK(acpi); 2263 return (0); 2264} 2265 2266/* 2267 * Acknowledge (or reject) a pending sleep state. The caller has 2268 * prepared for suspend and is now ready for it to proceed. If the 2269 * error argument is non-zero, it indicates suspend should be cancelled 2270 * and gives an errno value describing why. Once all votes are in, 2271 * we suspend the system. 2272 */ 2273int 2274acpi_AckSleepState(struct apm_clone_data *clone, int error) 2275{ 2276 struct acpi_softc *sc; 2277 int ret, sleeping; 2278 2279#if !defined(__i386__) 2280 /* This platform does not support acpi suspend/resume. */ 2281 return (EOPNOTSUPP); 2282#endif 2283 2284 /* If no pending sleep state, return an error. */ 2285 ACPI_LOCK(acpi); 2286 sc = clone->acpi_sc; 2287 if (sc->acpi_next_sstate == 0) { 2288 ACPI_UNLOCK(acpi); 2289 return (ENXIO); 2290 } 2291 2292 /* Caller wants to abort suspend process. */ 2293 if (error) { 2294 sc->acpi_next_sstate = 0; 2295 callout_stop(&sc->susp_force_to); 2296 printf("acpi: listener on %s cancelled the pending suspend\n", 2297 devtoname(clone->cdev)); 2298 ACPI_UNLOCK(acpi); 2299 return (0); 2300 } 2301 2302 /* 2303 * Mark this device as acking the suspend request. Then, walk through 2304 * all devices, seeing if they agree yet. We only count devices that 2305 * are writable since read-only devices couldn't ack the request. 2306 */ 2307 clone->notify_status = APM_EV_ACKED; 2308 sleeping = TRUE; 2309 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2310 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2311 clone->notify_status != APM_EV_ACKED) { 2312 sleeping = FALSE; 2313 break; 2314 } 2315 } 2316 2317 /* If all devices have voted "yes", we will suspend now. */ 2318 if (sleeping) 2319 callout_stop(&sc->susp_force_to); 2320 ACPI_UNLOCK(acpi); 2321 ret = 0; 2322 if (sleeping) { 2323 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2324 ret = ENODEV; 2325 } 2326 2327 return (ret); 2328} 2329 2330static void 2331acpi_sleep_enable(void *arg) 2332{ 2333 2334 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2335} 2336 2337enum acpi_sleep_state { 2338 ACPI_SS_NONE, 2339 ACPI_SS_GPE_SET, 2340 ACPI_SS_DEV_SUSPEND, 2341 ACPI_SS_SLP_PREP, 2342 ACPI_SS_SLEPT, 2343}; 2344 2345/* 2346 * Enter the desired system sleep state. 2347 * 2348 * Currently we support S1-S5 but S4 is only S4BIOS 2349 */ 2350static ACPI_STATUS 2351acpi_EnterSleepState(struct acpi_softc *sc, int state) 2352{ 2353 ACPI_STATUS status; 2354 UINT8 TypeA; 2355 UINT8 TypeB; 2356 enum acpi_sleep_state slp_state; 2357 2358 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2359 2360 /* Re-entry once we're suspending is not allowed. */ 2361 status = AE_OK; 2362 ACPI_LOCK(acpi); 2363 if (sc->acpi_sleep_disabled) { 2364 ACPI_UNLOCK(acpi); 2365 printf("acpi: suspend request ignored (not ready yet)\n"); 2366 return (AE_ERROR); 2367 } 2368 sc->acpi_sleep_disabled = 1; 2369 ACPI_UNLOCK(acpi); 2370 2371 /* 2372 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2373 * drivers need this. 2374 */ 2375 mtx_lock(&Giant); 2376 slp_state = ACPI_SS_NONE; 2377 switch (state) { 2378 case ACPI_STATE_S1: 2379 case ACPI_STATE_S2: 2380 case ACPI_STATE_S3: 2381 case ACPI_STATE_S4: 2382 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2383 if (status == AE_NOT_FOUND) { 2384 device_printf(sc->acpi_dev, 2385 "Sleep state S%d not supported by BIOS\n", state); 2386 break; 2387 } else if (ACPI_FAILURE(status)) { 2388 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2389 AcpiFormatException(status)); 2390 break; 2391 } 2392 2393 sc->acpi_sstate = state; 2394 2395 /* Enable any GPEs as appropriate and requested by the user. */ 2396 acpi_wake_prep_walk(state); 2397 slp_state = ACPI_SS_GPE_SET; 2398 2399 /* 2400 * Inform all devices that we are going to sleep. If at least one 2401 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2402 * 2403 * XXX Note that a better two-pass approach with a 'veto' pass 2404 * followed by a "real thing" pass would be better, but the current 2405 * bus interface does not provide for this. 2406 */ 2407 if (DEVICE_SUSPEND(root_bus) != 0) { 2408 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2409 break; 2410 } 2411 slp_state = ACPI_SS_DEV_SUSPEND; 2412 2413 /* If testing device suspend only, back out of everything here. */ 2414 if (acpi_susp_bounce) 2415 break; 2416 2417 status = AcpiEnterSleepStatePrep(state); 2418 if (ACPI_FAILURE(status)) { 2419 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2420 AcpiFormatException(status)); 2421 break; 2422 } 2423 slp_state = ACPI_SS_SLP_PREP; 2424 2425 if (sc->acpi_sleep_delay > 0) 2426 DELAY(sc->acpi_sleep_delay * 1000000); 2427 2428 if (state != ACPI_STATE_S1) { 2429 acpi_sleep_machdep(sc, state); 2430 2431 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2432 if (state == ACPI_STATE_S4) 2433 AcpiEnable(); 2434 } else { 2435 ACPI_DISABLE_IRQS(); 2436 status = AcpiEnterSleepState(state); 2437 if (ACPI_FAILURE(status)) { 2438 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2439 AcpiFormatException(status)); 2440 break; 2441 } 2442 } 2443 slp_state = ACPI_SS_SLEPT; 2444 break; 2445 case ACPI_STATE_S5: 2446 /* 2447 * Shut down cleanly and power off. This will call us back through the 2448 * shutdown handlers. 2449 */ 2450 shutdown_nice(RB_POWEROFF); 2451 break; 2452 case ACPI_STATE_S0: 2453 default: 2454 status = AE_BAD_PARAMETER; 2455 break; 2456 } 2457 2458 /* 2459 * Back out state according to how far along we got in the suspend 2460 * process. This handles both the error and success cases. 2461 */ 2462 sc->acpi_next_sstate = 0; 2463 if (slp_state >= ACPI_SS_GPE_SET) { 2464 acpi_wake_prep_walk(state); 2465 sc->acpi_sstate = ACPI_STATE_S0; 2466 } 2467 if (slp_state >= ACPI_SS_SLP_PREP) 2468 AcpiLeaveSleepState(state); 2469 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2470 DEVICE_RESUME(root_bus); 2471 if (slp_state >= ACPI_SS_SLEPT) 2472 acpi_enable_fixed_events(sc); 2473 2474 /* Allow another sleep request after a while. */ 2475 if (state != ACPI_STATE_S5) 2476 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2477 2478 /* Run /etc/rc.resume after we are back. */ 2479 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2480 2481 mtx_unlock(&Giant); 2482 return_ACPI_STATUS (status); 2483} 2484 2485/* Initialize a device's wake GPE. */ 2486int 2487acpi_wake_init(device_t dev, int type) 2488{ 2489 struct acpi_prw_data prw; 2490 2491 /* Evaluate _PRW to find the GPE. */ 2492 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2493 return (ENXIO); 2494 2495 /* Set the requested type for the GPE (runtime, wake, or both). */ 2496 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2497 device_printf(dev, "set GPE type failed\n"); 2498 return (ENXIO); 2499 } 2500 2501 return (0); 2502} 2503 2504/* Enable or disable the device's wake GPE. */ 2505int 2506acpi_wake_set_enable(device_t dev, int enable) 2507{ 2508 struct acpi_prw_data prw; 2509 ACPI_STATUS status; 2510 int flags; 2511 2512 /* Make sure the device supports waking the system and get the GPE. */ 2513 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2514 return (ENXIO); 2515 2516 flags = acpi_get_flags(dev); 2517 if (enable) { 2518 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2519 if (ACPI_FAILURE(status)) { 2520 device_printf(dev, "enable wake failed\n"); 2521 return (ENXIO); 2522 } 2523 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2524 } else { 2525 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2526 if (ACPI_FAILURE(status)) { 2527 device_printf(dev, "disable wake failed\n"); 2528 return (ENXIO); 2529 } 2530 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2531 } 2532 2533 return (0); 2534} 2535 2536static int 2537acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2538{ 2539 struct acpi_prw_data prw; 2540 device_t dev; 2541 2542 /* Check that this is a wake-capable device and get its GPE. */ 2543 if (acpi_parse_prw(handle, &prw) != 0) 2544 return (ENXIO); 2545 dev = acpi_get_device(handle); 2546 2547 /* 2548 * The destination sleep state must be less than (i.e., higher power) 2549 * or equal to the value specified by _PRW. If this GPE cannot be 2550 * enabled for the next sleep state, then disable it. If it can and 2551 * the user requested it be enabled, turn on any required power resources 2552 * and set _PSW. 2553 */ 2554 if (sstate > prw.lowest_wake) { 2555 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2556 if (bootverbose) 2557 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2558 acpi_name(handle), sstate); 2559 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2560 acpi_pwr_wake_enable(handle, 1); 2561 acpi_SetInteger(handle, "_PSW", 1); 2562 if (bootverbose) 2563 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2564 acpi_name(handle), sstate); 2565 } 2566 2567 return (0); 2568} 2569 2570static int 2571acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2572{ 2573 struct acpi_prw_data prw; 2574 device_t dev; 2575 2576 /* 2577 * Check that this is a wake-capable device and get its GPE. Return 2578 * now if the user didn't enable this device for wake. 2579 */ 2580 if (acpi_parse_prw(handle, &prw) != 0) 2581 return (ENXIO); 2582 dev = acpi_get_device(handle); 2583 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2584 return (0); 2585 2586 /* 2587 * If this GPE couldn't be enabled for the previous sleep state, it was 2588 * disabled before going to sleep so re-enable it. If it was enabled, 2589 * clear _PSW and turn off any power resources it used. 2590 */ 2591 if (sstate > prw.lowest_wake) { 2592 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2593 if (bootverbose) 2594 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2595 } else { 2596 acpi_SetInteger(handle, "_PSW", 0); 2597 acpi_pwr_wake_enable(handle, 0); 2598 if (bootverbose) 2599 device_printf(dev, "run_prep cleaned up for %s\n", 2600 acpi_name(handle)); 2601 } 2602 2603 return (0); 2604} 2605 2606static ACPI_STATUS 2607acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2608{ 2609 int sstate; 2610 2611 /* If suspending, run the sleep prep function, otherwise wake. */ 2612 sstate = *(int *)context; 2613 if (AcpiGbl_SystemAwakeAndRunning) 2614 acpi_wake_sleep_prep(handle, sstate); 2615 else 2616 acpi_wake_run_prep(handle, sstate); 2617 return (AE_OK); 2618} 2619 2620/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2621static int 2622acpi_wake_prep_walk(int sstate) 2623{ 2624 ACPI_HANDLE sb_handle; 2625 2626 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2627 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2628 acpi_wake_prep, &sstate, NULL); 2629 return (0); 2630} 2631 2632/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2633static int 2634acpi_wake_sysctl_walk(device_t dev) 2635{ 2636 int error, i, numdevs; 2637 device_t *devlist; 2638 device_t child; 2639 ACPI_STATUS status; 2640 2641 error = device_get_children(dev, &devlist, &numdevs); 2642 if (error != 0 || numdevs == 0) { 2643 if (numdevs == 0) 2644 free(devlist, M_TEMP); 2645 return (error); 2646 } 2647 for (i = 0; i < numdevs; i++) { 2648 child = devlist[i]; 2649 acpi_wake_sysctl_walk(child); 2650 if (!device_is_attached(child)) 2651 continue; 2652 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2653 if (ACPI_SUCCESS(status)) { 2654 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2655 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2656 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2657 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2658 } 2659 } 2660 free(devlist, M_TEMP); 2661 2662 return (0); 2663} 2664 2665/* Enable or disable wake from userland. */ 2666static int 2667acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2668{ 2669 int enable, error; 2670 device_t dev; 2671 2672 dev = (device_t)arg1; 2673 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2674 2675 error = sysctl_handle_int(oidp, &enable, 0, req); 2676 if (error != 0 || req->newptr == NULL) 2677 return (error); 2678 if (enable != 0 && enable != 1) 2679 return (EINVAL); 2680 2681 return (acpi_wake_set_enable(dev, enable)); 2682} 2683 2684/* Parse a device's _PRW into a structure. */ 2685int 2686acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2687{ 2688 ACPI_STATUS status; 2689 ACPI_BUFFER prw_buffer; 2690 ACPI_OBJECT *res, *res2; 2691 int error, i, power_count; 2692 2693 if (h == NULL || prw == NULL) 2694 return (EINVAL); 2695 2696 /* 2697 * The _PRW object (7.2.9) is only required for devices that have the 2698 * ability to wake the system from a sleeping state. 2699 */ 2700 error = EINVAL; 2701 prw_buffer.Pointer = NULL; 2702 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2703 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2704 if (ACPI_FAILURE(status)) 2705 return (ENOENT); 2706 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2707 if (res == NULL) 2708 return (ENOENT); 2709 if (!ACPI_PKG_VALID(res, 2)) 2710 goto out; 2711 2712 /* 2713 * Element 1 of the _PRW object: 2714 * The lowest power system sleeping state that can be entered while still 2715 * providing wake functionality. The sleeping state being entered must 2716 * be less than (i.e., higher power) or equal to this value. 2717 */ 2718 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2719 goto out; 2720 2721 /* 2722 * Element 0 of the _PRW object: 2723 */ 2724 switch (res->Package.Elements[0].Type) { 2725 case ACPI_TYPE_INTEGER: 2726 /* 2727 * If the data type of this package element is numeric, then this 2728 * _PRW package element is the bit index in the GPEx_EN, in the 2729 * GPE blocks described in the FADT, of the enable bit that is 2730 * enabled for the wake event. 2731 */ 2732 prw->gpe_handle = NULL; 2733 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2734 error = 0; 2735 break; 2736 case ACPI_TYPE_PACKAGE: 2737 /* 2738 * If the data type of this package element is a package, then this 2739 * _PRW package element is itself a package containing two 2740 * elements. The first is an object reference to the GPE Block 2741 * device that contains the GPE that will be triggered by the wake 2742 * event. The second element is numeric and it contains the bit 2743 * index in the GPEx_EN, in the GPE Block referenced by the 2744 * first element in the package, of the enable bit that is enabled for 2745 * the wake event. 2746 * 2747 * For example, if this field is a package then it is of the form: 2748 * Package() {\_SB.PCI0.ISA.GPE, 2} 2749 */ 2750 res2 = &res->Package.Elements[0]; 2751 if (!ACPI_PKG_VALID(res2, 2)) 2752 goto out; 2753 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2754 if (prw->gpe_handle == NULL) 2755 goto out; 2756 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2757 goto out; 2758 error = 0; 2759 break; 2760 default: 2761 goto out; 2762 } 2763 2764 /* Elements 2 to N of the _PRW object are power resources. */ 2765 power_count = res->Package.Count - 2; 2766 if (power_count > ACPI_PRW_MAX_POWERRES) { 2767 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2768 power_count = 0; 2769 } 2770 prw->power_res_count = power_count; 2771 for (i = 0; i < power_count; i++) 2772 prw->power_res[i] = res->Package.Elements[i]; 2773 2774out: 2775 if (prw_buffer.Pointer != NULL) 2776 AcpiOsFree(prw_buffer.Pointer); 2777 return (error); 2778} 2779 2780/* 2781 * ACPI Event Handlers 2782 */ 2783 2784/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2785 2786static void 2787acpi_system_eventhandler_sleep(void *arg, int state) 2788{ 2789 int ret; 2790 2791 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2792 2793 /* Check if button action is disabled. */ 2794 if (state == ACPI_S_STATES_MAX + 1) 2795 return; 2796 2797 /* Request that the system prepare to enter the given suspend state. */ 2798 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2799 if (ret != 0) 2800 printf("acpi: request to enter state S%d failed (err %d)\n", 2801 state, ret); 2802 2803 return_VOID; 2804} 2805 2806static void 2807acpi_system_eventhandler_wakeup(void *arg, int state) 2808{ 2809 2810 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2811 2812 /* Currently, nothing to do for wakeup. */ 2813 2814 return_VOID; 2815} 2816 2817/* 2818 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2819 */ 2820UINT32 2821acpi_event_power_button_sleep(void *context) 2822{ 2823 struct acpi_softc *sc = (struct acpi_softc *)context; 2824 2825 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2826 2827 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2828 2829 return_VALUE (ACPI_INTERRUPT_HANDLED); 2830} 2831 2832UINT32 2833acpi_event_power_button_wake(void *context) 2834{ 2835 struct acpi_softc *sc = (struct acpi_softc *)context; 2836 2837 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2838 2839 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2840 2841 return_VALUE (ACPI_INTERRUPT_HANDLED); 2842} 2843 2844UINT32 2845acpi_event_sleep_button_sleep(void *context) 2846{ 2847 struct acpi_softc *sc = (struct acpi_softc *)context; 2848 2849 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2850 2851 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2852 2853 return_VALUE (ACPI_INTERRUPT_HANDLED); 2854} 2855 2856UINT32 2857acpi_event_sleep_button_wake(void *context) 2858{ 2859 struct acpi_softc *sc = (struct acpi_softc *)context; 2860 2861 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2862 2863 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2864 2865 return_VALUE (ACPI_INTERRUPT_HANDLED); 2866} 2867 2868/* 2869 * XXX This static buffer is suboptimal. There is no locking so only 2870 * use this for single-threaded callers. 2871 */ 2872char * 2873acpi_name(ACPI_HANDLE handle) 2874{ 2875 ACPI_BUFFER buf; 2876 static char data[256]; 2877 2878 buf.Length = sizeof(data); 2879 buf.Pointer = data; 2880 2881 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2882 return (data); 2883 return ("(unknown)"); 2884} 2885 2886/* 2887 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2888 * parts of the namespace. 2889 */ 2890int 2891acpi_avoid(ACPI_HANDLE handle) 2892{ 2893 char *cp, *env, *np; 2894 int len; 2895 2896 np = acpi_name(handle); 2897 if (*np == '\\') 2898 np++; 2899 if ((env = getenv("debug.acpi.avoid")) == NULL) 2900 return (0); 2901 2902 /* Scan the avoid list checking for a match */ 2903 cp = env; 2904 for (;;) { 2905 while (*cp != 0 && isspace(*cp)) 2906 cp++; 2907 if (*cp == 0) 2908 break; 2909 len = 0; 2910 while (cp[len] != 0 && !isspace(cp[len])) 2911 len++; 2912 if (!strncmp(cp, np, len)) { 2913 freeenv(env); 2914 return(1); 2915 } 2916 cp += len; 2917 } 2918 freeenv(env); 2919 2920 return (0); 2921} 2922 2923/* 2924 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2925 */ 2926int 2927acpi_disabled(char *subsys) 2928{ 2929 char *cp, *env; 2930 int len; 2931 2932 if ((env = getenv("debug.acpi.disabled")) == NULL) 2933 return (0); 2934 if (strcmp(env, "all") == 0) { 2935 freeenv(env); 2936 return (1); 2937 } 2938 2939 /* Scan the disable list, checking for a match. */ 2940 cp = env; 2941 for (;;) { 2942 while (*cp != '\0' && isspace(*cp)) 2943 cp++; 2944 if (*cp == '\0') 2945 break; 2946 len = 0; 2947 while (cp[len] != '\0' && !isspace(cp[len])) 2948 len++; 2949 if (strncmp(cp, subsys, len) == 0) { 2950 freeenv(env); 2951 return (1); 2952 } 2953 cp += len; 2954 } 2955 freeenv(env); 2956 2957 return (0); 2958} 2959 2960/* 2961 * Control interface. 2962 * 2963 * We multiplex ioctls for all participating ACPI devices here. Individual 2964 * drivers wanting to be accessible via /dev/acpi should use the 2965 * register/deregister interface to make their handlers visible. 2966 */ 2967struct acpi_ioctl_hook 2968{ 2969 TAILQ_ENTRY(acpi_ioctl_hook) link; 2970 u_long cmd; 2971 acpi_ioctl_fn fn; 2972 void *arg; 2973}; 2974 2975static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2976static int acpi_ioctl_hooks_initted; 2977 2978int 2979acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2980{ 2981 struct acpi_ioctl_hook *hp; 2982 2983 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2984 return (ENOMEM); 2985 hp->cmd = cmd; 2986 hp->fn = fn; 2987 hp->arg = arg; 2988 2989 ACPI_LOCK(acpi); 2990 if (acpi_ioctl_hooks_initted == 0) { 2991 TAILQ_INIT(&acpi_ioctl_hooks); 2992 acpi_ioctl_hooks_initted = 1; 2993 } 2994 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2995 ACPI_UNLOCK(acpi); 2996 2997 return (0); 2998} 2999 3000void 3001acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3002{ 3003 struct acpi_ioctl_hook *hp; 3004 3005 ACPI_LOCK(acpi); 3006 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3007 if (hp->cmd == cmd && hp->fn == fn) 3008 break; 3009 3010 if (hp != NULL) { 3011 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3012 free(hp, M_ACPIDEV); 3013 } 3014 ACPI_UNLOCK(acpi); 3015} 3016 3017static int 3018acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 3019{ 3020 return (0); 3021} 3022 3023static int 3024acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 3025{ 3026 return (0); 3027} 3028 3029static int 3030acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 3031{ 3032 struct acpi_softc *sc; 3033 struct acpi_ioctl_hook *hp; 3034 int error, state; 3035 3036 error = 0; 3037 hp = NULL; 3038 sc = dev->si_drv1; 3039 3040 /* 3041 * Scan the list of registered ioctls, looking for handlers. 3042 */ 3043 ACPI_LOCK(acpi); 3044 if (acpi_ioctl_hooks_initted) 3045 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3046 if (hp->cmd == cmd) 3047 break; 3048 } 3049 ACPI_UNLOCK(acpi); 3050 if (hp) 3051 return (hp->fn(cmd, addr, hp->arg)); 3052 3053 /* 3054 * Core ioctls are not permitted for non-writable user. 3055 * Currently, other ioctls just fetch information. 3056 * Not changing system behavior. 3057 */ 3058 if ((flag & FWRITE) == 0) 3059 return (EPERM); 3060 3061 /* Core system ioctls. */ 3062 switch (cmd) { 3063 case ACPIIO_REQSLPSTATE: 3064 state = *(int *)addr; 3065 if (state != ACPI_STATE_S5) 3066 error = acpi_ReqSleepState(sc, state); 3067 else { 3068 printf("power off via acpi ioctl not supported\n"); 3069 error = ENXIO; 3070 } 3071 break; 3072 case ACPIIO_ACKSLPSTATE: 3073 error = *(int *)addr; 3074 error = acpi_AckSleepState(sc->acpi_clone, error); 3075 break; 3076 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3077 error = EINVAL; 3078 state = *(int *)addr; 3079 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3080 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3081 error = 0; 3082 break; 3083 default: 3084 error = ENXIO; 3085 break; 3086 } 3087 3088 return (error); 3089} 3090 3091static int 3092acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3093{ 3094 int error; 3095 struct sbuf sb; 3096 UINT8 state, TypeA, TypeB; 3097 3098 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3099 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3100 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3101 sbuf_printf(&sb, "S%d ", state); 3102 sbuf_trim(&sb); 3103 sbuf_finish(&sb); 3104 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3105 sbuf_delete(&sb); 3106 return (error); 3107} 3108 3109static int 3110acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3111{ 3112 char sleep_state[10]; 3113 int error; 3114 u_int new_state, old_state; 3115 3116 old_state = *(u_int *)oidp->oid_arg1; 3117 if (old_state > ACPI_S_STATES_MAX + 1) 3118 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3119 else 3120 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3121 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3122 if (error == 0 && req->newptr != NULL) { 3123 new_state = ACPI_STATE_S0; 3124 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3125 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3126 break; 3127 if (new_state <= ACPI_S_STATES_MAX + 1) { 3128 if (new_state != old_state) 3129 *(u_int *)oidp->oid_arg1 = new_state; 3130 } else 3131 error = EINVAL; 3132 } 3133 3134 return (error); 3135} 3136 3137/* Inform devctl(4) when we receive a Notify. */ 3138void 3139acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3140{ 3141 char notify_buf[16]; 3142 ACPI_BUFFER handle_buf; 3143 ACPI_STATUS status; 3144 3145 if (subsystem == NULL) 3146 return; 3147 3148 handle_buf.Pointer = NULL; 3149 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3150 status = AcpiNsHandleToPathname(h, &handle_buf); 3151 if (ACPI_FAILURE(status)) 3152 return; 3153 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3154 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3155 AcpiOsFree(handle_buf.Pointer); 3156} 3157 3158#ifdef ACPI_DEBUG 3159/* 3160 * Support for parsing debug options from the kernel environment. 3161 * 3162 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3163 * by specifying the names of the bits in the debug.acpi.layer and 3164 * debug.acpi.level environment variables. Bits may be unset by 3165 * prefixing the bit name with !. 3166 */ 3167struct debugtag 3168{ 3169 char *name; 3170 UINT32 value; 3171}; 3172 3173static struct debugtag dbg_layer[] = { 3174 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3175 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3176 {"ACPI_EVENTS", ACPI_EVENTS}, 3177 {"ACPI_TABLES", ACPI_TABLES}, 3178 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3179 {"ACPI_PARSER", ACPI_PARSER}, 3180 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3181 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3182 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3183 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3184 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3185 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3186 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3187 3188 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3189 {"ACPI_BATTERY", ACPI_BATTERY}, 3190 {"ACPI_BUS", ACPI_BUS}, 3191 {"ACPI_BUTTON", ACPI_BUTTON}, 3192 {"ACPI_EC", ACPI_EC}, 3193 {"ACPI_FAN", ACPI_FAN}, 3194 {"ACPI_POWERRES", ACPI_POWERRES}, 3195 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3196 {"ACPI_THERMAL", ACPI_THERMAL}, 3197 {"ACPI_TIMER", ACPI_TIMER}, 3198 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3199 {NULL, 0} 3200}; 3201 3202static struct debugtag dbg_level[] = { 3203 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 3204 {"ACPI_LV_WARN", ACPI_LV_WARN}, 3205 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3206 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3207 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3208 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3209 3210 /* Trace verbosity level 1 [Standard Trace Level] */ 3211 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3212 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3213 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3214 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3215 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3216 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3217 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3218 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3219 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3220 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3221 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3222 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3223 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3224 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3225 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3226 3227 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3228 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3229 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3230 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3231 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3232 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3233 3234 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3235 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3236 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3237 {"ACPI_LV_IO", ACPI_LV_IO}, 3238 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3239 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3240 3241 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3242 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3243 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3244 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3245 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3246 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3247 {NULL, 0} 3248}; 3249 3250static void 3251acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3252{ 3253 char *ep; 3254 int i, l; 3255 int set; 3256 3257 while (*cp) { 3258 if (isspace(*cp)) { 3259 cp++; 3260 continue; 3261 } 3262 ep = cp; 3263 while (*ep && !isspace(*ep)) 3264 ep++; 3265 if (*cp == '!') { 3266 set = 0; 3267 cp++; 3268 if (cp == ep) 3269 continue; 3270 } else { 3271 set = 1; 3272 } 3273 l = ep - cp; 3274 for (i = 0; tag[i].name != NULL; i++) { 3275 if (!strncmp(cp, tag[i].name, l)) { 3276 if (set) 3277 *flag |= tag[i].value; 3278 else 3279 *flag &= ~tag[i].value; 3280 } 3281 } 3282 cp = ep; 3283 } 3284} 3285 3286static void 3287acpi_set_debugging(void *junk) 3288{ 3289 char *layer, *level; 3290 3291 if (cold) { 3292 AcpiDbgLayer = 0; 3293 AcpiDbgLevel = 0; 3294 } 3295 3296 layer = getenv("debug.acpi.layer"); 3297 level = getenv("debug.acpi.level"); 3298 if (layer == NULL && level == NULL) 3299 return; 3300 3301 printf("ACPI set debug"); 3302 if (layer != NULL) { 3303 if (strcmp("NONE", layer) != 0) 3304 printf(" layer '%s'", layer); 3305 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3306 freeenv(layer); 3307 } 3308 if (level != NULL) { 3309 if (strcmp("NONE", level) != 0) 3310 printf(" level '%s'", level); 3311 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3312 freeenv(level); 3313 } 3314 printf("\n"); 3315} 3316 3317SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3318 NULL); 3319 3320static int 3321acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3322{ 3323 int error, *dbg; 3324 struct debugtag *tag; 3325 struct sbuf sb; 3326 3327 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3328 return (ENOMEM); 3329 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3330 tag = &dbg_layer[0]; 3331 dbg = &AcpiDbgLayer; 3332 } else { 3333 tag = &dbg_level[0]; 3334 dbg = &AcpiDbgLevel; 3335 } 3336 3337 /* Get old values if this is a get request. */ 3338 ACPI_SERIAL_BEGIN(acpi); 3339 if (*dbg == 0) { 3340 sbuf_cpy(&sb, "NONE"); 3341 } else if (req->newptr == NULL) { 3342 for (; tag->name != NULL; tag++) { 3343 if ((*dbg & tag->value) == tag->value) 3344 sbuf_printf(&sb, "%s ", tag->name); 3345 } 3346 } 3347 sbuf_trim(&sb); 3348 sbuf_finish(&sb); 3349 3350 /* Copy out the old values to the user. */ 3351 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3352 sbuf_delete(&sb); 3353 3354 /* If the user is setting a string, parse it. */ 3355 if (error == 0 && req->newptr != NULL) { 3356 *dbg = 0; 3357 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3358 acpi_set_debugging(NULL); 3359 } 3360 ACPI_SERIAL_END(acpi); 3361 3362 return (error); 3363} 3364 3365SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3366 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3367SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3368 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3369#endif /* ACPI_DEBUG */ 3370 3371static int 3372acpi_pm_func(u_long cmd, void *arg, ...) 3373{ 3374 int state, acpi_state; 3375 int error; 3376 struct acpi_softc *sc; 3377 va_list ap; 3378 3379 error = 0; 3380 switch (cmd) { 3381 case POWER_CMD_SUSPEND: 3382 sc = (struct acpi_softc *)arg; 3383 if (sc == NULL) { 3384 error = EINVAL; 3385 goto out; 3386 } 3387 3388 va_start(ap, arg); 3389 state = va_arg(ap, int); 3390 va_end(ap); 3391 3392 switch (state) { 3393 case POWER_SLEEP_STATE_STANDBY: 3394 acpi_state = sc->acpi_standby_sx; 3395 break; 3396 case POWER_SLEEP_STATE_SUSPEND: 3397 acpi_state = sc->acpi_suspend_sx; 3398 break; 3399 case POWER_SLEEP_STATE_HIBERNATE: 3400 acpi_state = ACPI_STATE_S4; 3401 break; 3402 default: 3403 error = EINVAL; 3404 goto out; 3405 } 3406 3407 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3408 error = ENXIO; 3409 break; 3410 default: 3411 error = EINVAL; 3412 goto out; 3413 } 3414 3415out: 3416 return (error); 3417} 3418 3419static void 3420acpi_pm_register(void *arg) 3421{ 3422 if (!cold || resource_disabled("acpi", 0)) 3423 return; 3424 3425 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3426} 3427 3428SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3429