1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #ifdef SMP 50 #include <sys/sched.h> 51 #endif 52 #include <sys/smp.h> 53 #include <sys/timetc.h> 54 55 #if defined(__i386__) || defined(__amd64__) 56 #include <machine/pci_cfgreg.h> 57 #endif 58 #include <machine/resource.h> 59 #include <machine/bus.h> 60 #include <sys/rman.h> 61 #include <isa/isavar.h> 62 #include <isa/pnpvar.h> 63 64 #include <contrib/dev/acpica/include/acpi.h> 65 #include <contrib/dev/acpica/include/accommon.h> 66 #include <contrib/dev/acpica/include/acnamesp.h> 67 68 #include <dev/acpica/acpivar.h> 69 #include <dev/acpica/acpiio.h> 70 71 #include "pci_if.h" 72 #include <dev/pci/pcivar.h> 73 #include <dev/pci/pci_private.h> 74 75 #include <vm/vm_param.h> 76 77 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 78 79 /* Hooks for the ACPI CA debugging infrastructure */ 80 #define _COMPONENT ACPI_BUS 81 ACPI_MODULE_NAME("ACPI") 82 83 static d_open_t acpiopen; 84 static d_close_t acpiclose; 85 static d_ioctl_t acpiioctl; 86 87 static struct cdevsw acpi_cdevsw = { 88 .d_version = D_VERSION, 89 .d_open = acpiopen, 90 .d_close = acpiclose, 91 .d_ioctl = acpiioctl, 92 .d_name = "acpi", 93 }; 94 95 /* Global mutex for locking access to the ACPI subsystem. */ 96 struct mtx acpi_mutex; 97 98 /* Bitmap of device quirks. */ 99 int acpi_quirks; 100 101 /* Supported sleep states. */ 102 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT]; 103 104 static int acpi_modevent(struct module *mod, int event, void *junk); 105 static int acpi_probe(device_t dev); 106 static int acpi_attach(device_t dev); 107 static int acpi_suspend(device_t dev); 108 static int acpi_resume(device_t dev); 109 static int acpi_shutdown(device_t dev); 110 static device_t acpi_add_child(device_t bus, int order, const char *name, 111 int unit); 112 static int acpi_print_child(device_t bus, device_t child); 113 static void acpi_probe_nomatch(device_t bus, device_t child); 114 static void acpi_driver_added(device_t dev, driver_t *driver); 115 static int acpi_read_ivar(device_t dev, device_t child, int index, 116 uintptr_t *result); 117 static int acpi_write_ivar(device_t dev, device_t child, int index, 118 uintptr_t value); 119 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 120 static int acpi_sysres_alloc(device_t dev); 121 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 122 int type, int *rid, u_long start, u_long end, 123 u_long count, u_int flags); 124 static int acpi_release_resource(device_t bus, device_t child, int type, 125 int rid, struct resource *r); 126 static void acpi_delete_resource(device_t bus, device_t child, int type, 127 int rid); 128 static uint32_t acpi_isa_get_logicalid(device_t dev); 129 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 130 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 131 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 132 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 133 ACPI_BUFFER *ret); 134 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 135 int *dstate); 136 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 137 void *context, void **retval); 138 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 139 int max_depth, acpi_scan_cb_t user_fn, void *arg); 140 static int acpi_set_powerstate_method(device_t bus, device_t child, 141 int state); 142 static int acpi_isa_pnp_probe(device_t bus, device_t child, 143 struct isa_pnp_id *ids); 144 static void acpi_probe_children(device_t bus); 145 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 146 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 147 void *context, void **status); 148 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 149 static void acpi_sleep_enable(void *arg); 150 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc); 151 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 152 static void acpi_shutdown_final(void *arg, int howto); 153 static void acpi_enable_fixed_events(struct acpi_softc *sc); 154 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 155 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 156 static int acpi_wake_prep_walk(int sstate); 157 static int acpi_wake_sysctl_walk(device_t dev); 158 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 159 static void acpi_system_eventhandler_sleep(void *arg, int state); 160 static void acpi_system_eventhandler_wakeup(void *arg, int state); 161 static int acpi_sname2sstate(const char *sname); 162 static const char *acpi_sstate2sname(int sstate); 163 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 164 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 165 static int acpi_pm_func(u_long cmd, void *arg, ...); 166 static int acpi_child_location_str_method(device_t acdev, device_t child, 167 char *buf, size_t buflen); 168 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 169 char *buf, size_t buflen); 170 #if defined(__i386__) || defined(__amd64__) 171 static void acpi_enable_pcie(void); 172 #endif 173 static void acpi_hint_device_unit(device_t acdev, device_t child, 174 const char *name, int *unitp); 175 176 static device_method_t acpi_methods[] = { 177 /* Device interface */ 178 DEVMETHOD(device_probe, acpi_probe), 179 DEVMETHOD(device_attach, acpi_attach), 180 DEVMETHOD(device_shutdown, acpi_shutdown), 181 DEVMETHOD(device_detach, bus_generic_detach), 182 DEVMETHOD(device_suspend, acpi_suspend), 183 DEVMETHOD(device_resume, acpi_resume), 184 185 /* Bus interface */ 186 DEVMETHOD(bus_add_child, acpi_add_child), 187 DEVMETHOD(bus_print_child, acpi_print_child), 188 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 189 DEVMETHOD(bus_driver_added, acpi_driver_added), 190 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 191 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 192 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 193 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 194 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 195 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 196 DEVMETHOD(bus_release_resource, acpi_release_resource), 197 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 198 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 199 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 200 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 201 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 202 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 203 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 204 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit), 205 206 /* ACPI bus */ 207 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 208 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 209 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 210 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 211 212 /* PCI emulation */ 213 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 214 215 /* ISA emulation */ 216 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 217 218 {0, 0} 219 }; 220 221 static driver_t acpi_driver = { 222 "acpi", 223 acpi_methods, 224 sizeof(struct acpi_softc), 225 }; 226 227 static devclass_t acpi_devclass; 228 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 229 MODULE_VERSION(acpi, 1); 230 231 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 232 233 /* Local pools for managing system resources for ACPI child devices. */ 234 static struct rman acpi_rman_io, acpi_rman_mem; 235 236 #define ACPI_MINIMUM_AWAKETIME 5 237 238 /* Holds the description of the acpi0 device. */ 239 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 240 241 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 242 static char acpi_ca_version[12]; 243 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 244 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 245 246 /* 247 * Allow override of whether methods execute in parallel or not. 248 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 249 * errors for AML that really can't handle parallel method execution. 250 * It is off by default since this breaks recursive methods and 251 * some IBMs use such code. 252 */ 253 static int acpi_serialize_methods; 254 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 255 256 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 257 static int acpi_do_powerstate = 1; 258 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 259 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 260 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 261 262 /* Reset system clock while resuming. XXX Remove once tested. */ 263 static int acpi_reset_clock = 1; 264 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock); 265 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW, 266 &acpi_reset_clock, 1, "Reset system clock while resuming."); 267 268 /* Allow users to override quirks. */ 269 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 270 271 static int acpi_susp_bounce; 272 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 273 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 274 275 /* 276 * ACPI can only be loaded as a module by the loader; activating it after 277 * system bootstrap time is not useful, and can be fatal to the system. 278 * It also cannot be unloaded, since the entire system bus hierarchy hangs 279 * off it. 280 */ 281 static int 282 acpi_modevent(struct module *mod, int event, void *junk) 283 { 284 switch (event) { 285 case MOD_LOAD: 286 if (!cold) { 287 printf("The ACPI driver cannot be loaded after boot.\n"); 288 return (EPERM); 289 } 290 break; 291 case MOD_UNLOAD: 292 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 293 return (EBUSY); 294 break; 295 default: 296 break; 297 } 298 return (0); 299 } 300 301 /* 302 * Perform early initialization. 303 */ 304 ACPI_STATUS 305 acpi_Startup(void) 306 { 307 static int started = 0; 308 ACPI_STATUS status; 309 int val; 310 311 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 312 313 /* Only run the startup code once. The MADT driver also calls this. */ 314 if (started) 315 return_VALUE (AE_OK); 316 started = 1; 317 318 /* 319 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 320 * if more tables exist. 321 */ 322 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 323 printf("ACPI: Table initialisation failed: %s\n", 324 AcpiFormatException(status)); 325 return_VALUE (status); 326 } 327 328 /* Set up any quirks we have for this system. */ 329 if (acpi_quirks == ACPI_Q_OK) 330 acpi_table_quirks(&acpi_quirks); 331 332 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 333 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 334 acpi_quirks &= ~ACPI_Q_BROKEN; 335 if (acpi_quirks & ACPI_Q_BROKEN) { 336 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 337 status = AE_SUPPORT; 338 } 339 340 return_VALUE (status); 341 } 342 343 /* 344 * Detect ACPI and perform early initialisation. 345 */ 346 int 347 acpi_identify(void) 348 { 349 ACPI_TABLE_RSDP *rsdp; 350 ACPI_TABLE_HEADER *rsdt; 351 ACPI_PHYSICAL_ADDRESS paddr; 352 struct sbuf sb; 353 354 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 355 356 if (!cold) 357 return (ENXIO); 358 359 /* Check that we haven't been disabled with a hint. */ 360 if (resource_disabled("acpi", 0)) 361 return (ENXIO); 362 363 /* Check for other PM systems. */ 364 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 365 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 366 printf("ACPI identify failed, other PM system enabled.\n"); 367 return (ENXIO); 368 } 369 370 /* Initialize root tables. */ 371 if (ACPI_FAILURE(acpi_Startup())) { 372 printf("ACPI: Try disabling either ACPI or apic support.\n"); 373 return (ENXIO); 374 } 375 376 if ((paddr = AcpiOsGetRootPointer()) == 0 || 377 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 378 return (ENXIO); 379 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 380 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 381 else 382 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 383 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 384 385 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 386 return (ENXIO); 387 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 388 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 389 sbuf_trim(&sb); 390 sbuf_putc(&sb, ' '); 391 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 392 sbuf_trim(&sb); 393 sbuf_finish(&sb); 394 sbuf_delete(&sb); 395 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 396 397 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 398 399 return (0); 400 } 401 402 /* 403 * Fetch some descriptive data from ACPI to put in our attach message. 404 */ 405 static int 406 acpi_probe(device_t dev) 407 { 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 device_set_desc(dev, acpi_desc); 412 413 return_VALUE (0); 414 } 415 416 static int 417 acpi_attach(device_t dev) 418 { 419 struct acpi_softc *sc; 420 ACPI_STATUS status; 421 int error, state; 422 UINT32 flags; 423 UINT8 TypeA, TypeB; 424 char *env; 425 426 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 427 428 sc = device_get_softc(dev); 429 sc->acpi_dev = dev; 430 callout_init(&sc->susp_force_to, TRUE); 431 432 error = ENXIO; 433 434 /* Initialize resource manager. */ 435 acpi_rman_io.rm_type = RMAN_ARRAY; 436 acpi_rman_io.rm_start = 0; 437 acpi_rman_io.rm_end = 0xffff; 438 acpi_rman_io.rm_descr = "ACPI I/O ports"; 439 if (rman_init(&acpi_rman_io) != 0) 440 panic("acpi rman_init IO ports failed"); 441 acpi_rman_mem.rm_type = RMAN_ARRAY; 442 acpi_rman_mem.rm_start = 0; 443 acpi_rman_mem.rm_end = ~0ul; 444 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 445 if (rman_init(&acpi_rman_mem) != 0) 446 panic("acpi rman_init memory failed"); 447 448 /* Initialise the ACPI mutex */ 449 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 450 451 /* 452 * Set the globals from our tunables. This is needed because ACPI-CA 453 * uses UINT8 for some values and we have no tunable_byte. 454 */ 455 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 456 AcpiGbl_EnableInterpreterSlack = TRUE; 457 458 /* Start up the ACPI CA subsystem. */ 459 status = AcpiInitializeSubsystem(); 460 if (ACPI_FAILURE(status)) { 461 device_printf(dev, "Could not initialize Subsystem: %s\n", 462 AcpiFormatException(status)); 463 goto out; 464 } 465 466 /* Load ACPI name space. */ 467 status = AcpiLoadTables(); 468 if (ACPI_FAILURE(status)) { 469 device_printf(dev, "Could not load Namespace: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 #if defined(__i386__) || defined(__amd64__) 475 /* Handle MCFG table if present. */ 476 acpi_enable_pcie(); 477 #endif 478 479 /* Install the default address space handlers. */ 480 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 481 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 482 if (ACPI_FAILURE(status)) { 483 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 484 AcpiFormatException(status)); 485 goto out; 486 } 487 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 488 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 489 if (ACPI_FAILURE(status)) { 490 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 491 AcpiFormatException(status)); 492 goto out; 493 } 494 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 495 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 496 if (ACPI_FAILURE(status)) { 497 device_printf(dev, "could not initialise PciConfig handler: %s\n", 498 AcpiFormatException(status)); 499 goto out; 500 } 501 502 /* 503 * Note that some systems (specifically, those with namespace evaluation 504 * issues that require the avoidance of parts of the namespace) must 505 * avoid running _INI and _STA on everything, as well as dodging the final 506 * object init pass. 507 * 508 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 509 * 510 * XXX We should arrange for the object init pass after we have attached 511 * all our child devices, but on many systems it works here. 512 */ 513 flags = 0; 514 if (testenv("debug.acpi.avoid")) 515 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 516 517 /* Bring the hardware and basic handlers online. */ 518 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 519 device_printf(dev, "Could not enable ACPI: %s\n", 520 AcpiFormatException(status)); 521 goto out; 522 } 523 524 /* 525 * Call the ECDT probe function to provide EC functionality before 526 * the namespace has been evaluated. 527 * 528 * XXX This happens before the sysresource devices have been probed and 529 * attached so its resources come from nexus0. In practice, this isn't 530 * a problem but should be addressed eventually. 531 */ 532 acpi_ec_ecdt_probe(dev); 533 534 /* Bring device objects and regions online. */ 535 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 536 device_printf(dev, "Could not initialize ACPI objects: %s\n", 537 AcpiFormatException(status)); 538 goto out; 539 } 540 541 /* 542 * Setup our sysctl tree. 543 * 544 * XXX: This doesn't check to make sure that none of these fail. 545 */ 546 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 547 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 548 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 549 device_get_name(dev), CTLFLAG_RD, 0, ""); 550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 552 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 555 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 557 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 558 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 561 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 567 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 568 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 570 "sleep delay"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 573 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 577 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "handle_reboot", CTLFLAG_RW, 580 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 581 582 /* 583 * Default to 1 second before sleeping to give some machines time to 584 * stabilize. 585 */ 586 sc->acpi_sleep_delay = 1; 587 if (bootverbose) 588 sc->acpi_verbose = 1; 589 if ((env = getenv("hw.acpi.verbose")) != NULL) { 590 if (strcmp(env, "0") != 0) 591 sc->acpi_verbose = 1; 592 freeenv(env); 593 } 594 595 /* Only enable S4BIOS by default if the FACS says it is available. */ 596 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 597 sc->acpi_s4bios = 1; 598 599 /* Probe all supported sleep states. */ 600 acpi_sleep_states[ACPI_STATE_S0] = TRUE; 601 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 602 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 603 acpi_sleep_states[state] = TRUE; 604 605 /* 606 * Dispatch the default sleep state to devices. The lid switch is set 607 * to UNKNOWN by default to avoid surprising users. 608 */ 609 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ? 610 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN; 611 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN; 612 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ? 613 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN; 614 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ? 615 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN; 616 617 /* Pick the first valid sleep state for the sleep button default. */ 618 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN; 619 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 620 if (acpi_sleep_states[state]) { 621 sc->acpi_sleep_button_sx = state; 622 break; 623 } 624 625 acpi_enable_fixed_events(sc); 626 627 /* 628 * Scan the namespace and attach/initialise children. 629 */ 630 631 /* Register our shutdown handler. */ 632 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 633 SHUTDOWN_PRI_LAST); 634 635 /* 636 * Register our acpi event handlers. 637 * XXX should be configurable eg. via userland policy manager. 638 */ 639 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 640 sc, ACPI_EVENT_PRI_LAST); 641 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 642 sc, ACPI_EVENT_PRI_LAST); 643 644 /* Flag our initial states. */ 645 sc->acpi_enabled = TRUE; 646 sc->acpi_sstate = ACPI_STATE_S0; 647 sc->acpi_sleep_disabled = TRUE; 648 649 /* Create the control device */ 650 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 651 "acpi"); 652 sc->acpi_dev_t->si_drv1 = sc; 653 654 if ((error = acpi_machdep_init(dev))) 655 goto out; 656 657 /* Register ACPI again to pass the correct argument of pm_func. */ 658 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 659 660 if (!acpi_disabled("bus")) 661 acpi_probe_children(dev); 662 663 /* Allow sleep request after a while. */ 664 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 665 666 error = 0; 667 668 out: 669 return_VALUE (error); 670 } 671 672 static int 673 acpi_suspend(device_t dev) 674 { 675 device_t child, *devlist; 676 int error, i, numdevs, pstate; 677 678 GIANT_REQUIRED; 679 680 /* First give child devices a chance to suspend. */ 681 error = bus_generic_suspend(dev); 682 if (error) 683 return (error); 684 685 /* 686 * Now, set them into the appropriate power state, usually D3. If the 687 * device has an _SxD method for the next sleep state, use that power 688 * state instead. 689 */ 690 error = device_get_children(dev, &devlist, &numdevs); 691 if (error) 692 return (error); 693 for (i = 0; i < numdevs; i++) { 694 /* If the device is not attached, we've powered it down elsewhere. */ 695 child = devlist[i]; 696 if (!device_is_attached(child)) 697 continue; 698 699 /* 700 * Default to D3 for all sleep states. The _SxD method is optional 701 * so set the powerstate even if it's absent. 702 */ 703 pstate = PCI_POWERSTATE_D3; 704 error = acpi_device_pwr_for_sleep(device_get_parent(child), 705 child, &pstate); 706 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 707 pci_set_powerstate(child, pstate); 708 } 709 free(devlist, M_TEMP); 710 error = 0; 711 712 return (error); 713 } 714 715 static int 716 acpi_resume(device_t dev) 717 { 718 ACPI_HANDLE handle; 719 int i, numdevs, error; 720 device_t child, *devlist; 721 722 GIANT_REQUIRED; 723 724 /* 725 * Put all devices in D0 before resuming them. Call _S0D on each one 726 * since some systems expect this. 727 */ 728 error = device_get_children(dev, &devlist, &numdevs); 729 if (error) 730 return (error); 731 for (i = 0; i < numdevs; i++) { 732 child = devlist[i]; 733 handle = acpi_get_handle(child); 734 if (handle) 735 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 736 if (device_is_attached(child) && acpi_do_powerstate) 737 pci_set_powerstate(child, PCI_POWERSTATE_D0); 738 } 739 free(devlist, M_TEMP); 740 741 return (bus_generic_resume(dev)); 742 } 743 744 static int 745 acpi_shutdown(device_t dev) 746 { 747 748 GIANT_REQUIRED; 749 750 /* Allow children to shutdown first. */ 751 bus_generic_shutdown(dev); 752 753 /* 754 * Enable any GPEs that are able to power-on the system (i.e., RTC). 755 * Also, disable any that are not valid for this state (most). 756 */ 757 acpi_wake_prep_walk(ACPI_STATE_S5); 758 759 return (0); 760 } 761 762 /* 763 * Handle a new device being added 764 */ 765 static device_t 766 acpi_add_child(device_t bus, int order, const char *name, int unit) 767 { 768 struct acpi_device *ad; 769 device_t child; 770 771 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 772 return (NULL); 773 774 resource_list_init(&ad->ad_rl); 775 776 child = device_add_child_ordered(bus, order, name, unit); 777 if (child != NULL) 778 device_set_ivars(child, ad); 779 else 780 free(ad, M_ACPIDEV); 781 return (child); 782 } 783 784 static int 785 acpi_print_child(device_t bus, device_t child) 786 { 787 struct acpi_device *adev = device_get_ivars(child); 788 struct resource_list *rl = &adev->ad_rl; 789 int retval = 0; 790 791 retval += bus_print_child_header(bus, child); 792 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 793 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 794 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 795 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 796 if (device_get_flags(child)) 797 retval += printf(" flags %#x", device_get_flags(child)); 798 retval += bus_print_child_footer(bus, child); 799 800 return (retval); 801 } 802 803 /* 804 * If this device is an ACPI child but no one claimed it, attempt 805 * to power it off. We'll power it back up when a driver is added. 806 * 807 * XXX Disabled for now since many necessary devices (like fdc and 808 * ATA) don't claim the devices we created for them but still expect 809 * them to be powered up. 810 */ 811 static void 812 acpi_probe_nomatch(device_t bus, device_t child) 813 { 814 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 815 pci_set_powerstate(child, PCI_POWERSTATE_D3); 816 #endif 817 } 818 819 /* 820 * If a new driver has a chance to probe a child, first power it up. 821 * 822 * XXX Disabled for now (see acpi_probe_nomatch for details). 823 */ 824 static void 825 acpi_driver_added(device_t dev, driver_t *driver) 826 { 827 device_t child, *devlist; 828 int i, numdevs; 829 830 DEVICE_IDENTIFY(driver, dev); 831 if (device_get_children(dev, &devlist, &numdevs)) 832 return; 833 for (i = 0; i < numdevs; i++) { 834 child = devlist[i]; 835 if (device_get_state(child) == DS_NOTPRESENT) { 836 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER 837 pci_set_powerstate(child, PCI_POWERSTATE_D0); 838 if (device_probe_and_attach(child) != 0) 839 pci_set_powerstate(child, PCI_POWERSTATE_D3); 840 #else 841 device_probe_and_attach(child); 842 #endif 843 } 844 } 845 free(devlist, M_TEMP); 846 } 847 848 /* Location hint for devctl(8) */ 849 static int 850 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 851 size_t buflen) 852 { 853 struct acpi_device *dinfo = device_get_ivars(child); 854 855 if (dinfo->ad_handle) 856 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 857 else 858 snprintf(buf, buflen, "unknown"); 859 return (0); 860 } 861 862 /* PnP information for devctl(8) */ 863 static int 864 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 865 size_t buflen) 866 { 867 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 868 ACPI_DEVICE_INFO *adinfo; 869 struct acpi_device *dinfo = device_get_ivars(child); 870 char *end; 871 int error; 872 873 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 874 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 875 if (error) 876 snprintf(buf, buflen, "unknown"); 877 else 878 snprintf(buf, buflen, "_HID=%s _UID=%lu", 879 (adinfo->Valid & ACPI_VALID_HID) ? 880 adinfo->HardwareId.Value : "none", 881 (adinfo->Valid & ACPI_VALID_UID) ? 882 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 883 if (adinfo) 884 AcpiOsFree(adinfo); 885 886 return (0); 887 } 888 889 /* 890 * Handle per-device ivars 891 */ 892 static int 893 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 894 { 895 struct acpi_device *ad; 896 897 if ((ad = device_get_ivars(child)) == NULL) { 898 device_printf(child, "device has no ivars\n"); 899 return (ENOENT); 900 } 901 902 /* ACPI and ISA compatibility ivars */ 903 switch(index) { 904 case ACPI_IVAR_HANDLE: 905 *(ACPI_HANDLE *)result = ad->ad_handle; 906 break; 907 case ACPI_IVAR_MAGIC: 908 *(uintptr_t *)result = ad->ad_magic; 909 break; 910 case ACPI_IVAR_PRIVATE: 911 *(void **)result = ad->ad_private; 912 break; 913 case ACPI_IVAR_FLAGS: 914 *(int *)result = ad->ad_flags; 915 break; 916 case ISA_IVAR_VENDORID: 917 case ISA_IVAR_SERIAL: 918 case ISA_IVAR_COMPATID: 919 *(int *)result = -1; 920 break; 921 case ISA_IVAR_LOGICALID: 922 *(int *)result = acpi_isa_get_logicalid(child); 923 break; 924 default: 925 return (ENOENT); 926 } 927 928 return (0); 929 } 930 931 static int 932 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 933 { 934 struct acpi_device *ad; 935 936 if ((ad = device_get_ivars(child)) == NULL) { 937 device_printf(child, "device has no ivars\n"); 938 return (ENOENT); 939 } 940 941 switch(index) { 942 case ACPI_IVAR_HANDLE: 943 ad->ad_handle = (ACPI_HANDLE)value; 944 break; 945 case ACPI_IVAR_MAGIC: 946 ad->ad_magic = (uintptr_t)value; 947 break; 948 case ACPI_IVAR_PRIVATE: 949 ad->ad_private = (void *)value; 950 break; 951 case ACPI_IVAR_FLAGS: 952 ad->ad_flags = (int)value; 953 break; 954 default: 955 panic("bad ivar write request (%d)", index); 956 return (ENOENT); 957 } 958 959 return (0); 960 } 961 962 /* 963 * Handle child resource allocation/removal 964 */ 965 static struct resource_list * 966 acpi_get_rlist(device_t dev, device_t child) 967 { 968 struct acpi_device *ad; 969 970 ad = device_get_ivars(child); 971 return (&ad->ad_rl); 972 } 973 974 static int 975 acpi_match_resource_hint(device_t dev, int type, long value) 976 { 977 struct acpi_device *ad = device_get_ivars(dev); 978 struct resource_list *rl = &ad->ad_rl; 979 struct resource_list_entry *rle; 980 981 STAILQ_FOREACH(rle, rl, link) { 982 if (rle->type != type) 983 continue; 984 if (rle->start <= value && rle->end >= value) 985 return (1); 986 } 987 return (0); 988 } 989 990 /* 991 * Wire device unit numbers based on resource matches in hints. 992 */ 993 static void 994 acpi_hint_device_unit(device_t acdev, device_t child, const char *name, 995 int *unitp) 996 { 997 const char *s; 998 long value; 999 int line, matches, unit; 1000 1001 /* 1002 * Iterate over all the hints for the devices with the specified 1003 * name to see if one's resources are a subset of this device. 1004 */ 1005 line = 0; 1006 for (;;) { 1007 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0) 1008 break; 1009 1010 /* Must have an "at" for acpi or isa. */ 1011 resource_string_value(name, unit, "at", &s); 1012 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 || 1013 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0)) 1014 continue; 1015 1016 /* 1017 * Check for matching resources. We must have at least one, 1018 * and all resources specified have to match. 1019 * 1020 * XXX: We may want to revisit this to be more lenient and wire 1021 * as long as it gets one match. 1022 */ 1023 matches = 0; 1024 if (resource_long_value(name, unit, "port", &value) == 0) { 1025 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value)) 1026 matches++; 1027 else 1028 continue; 1029 } 1030 if (resource_long_value(name, unit, "maddr", &value) == 0) { 1031 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value)) 1032 matches++; 1033 else 1034 continue; 1035 } 1036 if (resource_long_value(name, unit, "irq", &value) == 0) { 1037 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value)) 1038 matches++; 1039 else 1040 continue; 1041 } 1042 if (resource_long_value(name, unit, "drq", &value) == 0) { 1043 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value)) 1044 matches++; 1045 else 1046 continue; 1047 } 1048 1049 if (matches > 0) { 1050 /* We have a winner! */ 1051 *unitp = unit; 1052 break; 1053 } 1054 } 1055 } 1056 1057 /* 1058 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1059 * duplicates, we merge any in the sysresource attach routine. 1060 */ 1061 static int 1062 acpi_sysres_alloc(device_t dev) 1063 { 1064 struct resource *res; 1065 struct resource_list *rl; 1066 struct resource_list_entry *rle; 1067 struct rman *rm; 1068 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1069 device_t *children; 1070 int child_count, i; 1071 1072 /* 1073 * Probe/attach any sysresource devices. This would be unnecessary if we 1074 * had multi-pass probe/attach. 1075 */ 1076 if (device_get_children(dev, &children, &child_count) != 0) 1077 return (ENXIO); 1078 for (i = 0; i < child_count; i++) { 1079 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1080 device_probe_and_attach(children[i]); 1081 } 1082 free(children, M_TEMP); 1083 1084 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1085 STAILQ_FOREACH(rle, rl, link) { 1086 if (rle->res != NULL) { 1087 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1088 continue; 1089 } 1090 1091 /* Only memory and IO resources are valid here. */ 1092 switch (rle->type) { 1093 case SYS_RES_IOPORT: 1094 rm = &acpi_rman_io; 1095 break; 1096 case SYS_RES_MEMORY: 1097 rm = &acpi_rman_mem; 1098 break; 1099 default: 1100 continue; 1101 } 1102 1103 /* Pre-allocate resource and add to our rman pool. */ 1104 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1105 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 1106 if (res != NULL) { 1107 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1108 rle->res = res; 1109 } else 1110 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1111 rle->start, rle->count, rle->type); 1112 } 1113 return (0); 1114 } 1115 1116 static struct resource * 1117 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1118 u_long start, u_long end, u_long count, u_int flags) 1119 { 1120 ACPI_RESOURCE ares; 1121 struct acpi_device *ad = device_get_ivars(child); 1122 struct resource_list *rl = &ad->ad_rl; 1123 struct resource_list_entry *rle; 1124 struct resource *res; 1125 struct rman *rm; 1126 1127 res = NULL; 1128 1129 /* We only handle memory and IO resources through rman. */ 1130 switch (type) { 1131 case SYS_RES_IOPORT: 1132 rm = &acpi_rman_io; 1133 break; 1134 case SYS_RES_MEMORY: 1135 rm = &acpi_rman_mem; 1136 break; 1137 default: 1138 rm = NULL; 1139 } 1140 1141 ACPI_SERIAL_BEGIN(acpi); 1142 1143 /* 1144 * If this is an allocation of the "default" range for a given RID, and 1145 * we know what the resources for this device are (i.e., they're on the 1146 * child's resource list), use those start/end values. 1147 */ 1148 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1149 rle = resource_list_find(rl, type, *rid); 1150 if (rle == NULL) 1151 goto out; 1152 start = rle->start; 1153 end = rle->end; 1154 count = rle->count; 1155 } 1156 1157 /* 1158 * If this is an allocation of a specific range, see if we can satisfy 1159 * the request from our system resource regions. If we can't, pass the 1160 * request up to the parent. 1161 */ 1162 if (start + count - 1 == end && rm != NULL) 1163 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1164 child); 1165 if (res == NULL) { 1166 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1167 start, end, count, flags); 1168 } else { 1169 rman_set_rid(res, *rid); 1170 1171 /* If requested, activate the resource using the parent's method. */ 1172 if (flags & RF_ACTIVE) 1173 if (bus_activate_resource(child, type, *rid, res) != 0) { 1174 rman_release_resource(res); 1175 res = NULL; 1176 goto out; 1177 } 1178 } 1179 1180 if (res != NULL && device_get_parent(child) == bus) 1181 switch (type) { 1182 case SYS_RES_IRQ: 1183 /* 1184 * Since bus_config_intr() takes immediate effect, we cannot 1185 * configure the interrupt associated with a device when we 1186 * parse the resources but have to defer it until a driver 1187 * actually allocates the interrupt via bus_alloc_resource(). 1188 * 1189 * XXX: Should we handle the lookup failing? 1190 */ 1191 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1192 acpi_config_intr(child, &ares); 1193 break; 1194 } 1195 1196 out: 1197 ACPI_SERIAL_END(acpi); 1198 return (res); 1199 } 1200 1201 static int 1202 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1203 struct resource *r) 1204 { 1205 struct rman *rm; 1206 int ret; 1207 1208 /* We only handle memory and IO resources through rman. */ 1209 switch (type) { 1210 case SYS_RES_IOPORT: 1211 rm = &acpi_rman_io; 1212 break; 1213 case SYS_RES_MEMORY: 1214 rm = &acpi_rman_mem; 1215 break; 1216 default: 1217 rm = NULL; 1218 } 1219 1220 ACPI_SERIAL_BEGIN(acpi); 1221 1222 /* 1223 * If this resource belongs to one of our internal managers, 1224 * deactivate it and release it to the local pool. If it doesn't, 1225 * pass this request up to the parent. 1226 */ 1227 if (rm != NULL && rman_is_region_manager(r, rm)) { 1228 if (rman_get_flags(r) & RF_ACTIVE) { 1229 ret = bus_deactivate_resource(child, type, rid, r); 1230 if (ret != 0) 1231 goto out; 1232 } 1233 ret = rman_release_resource(r); 1234 } else 1235 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1236 1237 out: 1238 ACPI_SERIAL_END(acpi); 1239 return (ret); 1240 } 1241 1242 static void 1243 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1244 { 1245 struct resource_list *rl; 1246 1247 rl = acpi_get_rlist(bus, child); 1248 resource_list_delete(rl, type, rid); 1249 } 1250 1251 /* Allocate an IO port or memory resource, given its GAS. */ 1252 int 1253 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1254 struct resource **res, u_int flags) 1255 { 1256 int error, res_type; 1257 1258 error = ENOMEM; 1259 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1260 return (EINVAL); 1261 1262 /* We only support memory and IO spaces. */ 1263 switch (gas->SpaceId) { 1264 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1265 res_type = SYS_RES_MEMORY; 1266 break; 1267 case ACPI_ADR_SPACE_SYSTEM_IO: 1268 res_type = SYS_RES_IOPORT; 1269 break; 1270 default: 1271 return (EOPNOTSUPP); 1272 } 1273 1274 /* 1275 * If the register width is less than 8, assume the BIOS author means 1276 * it is a bit field and just allocate a byte. 1277 */ 1278 if (gas->BitWidth && gas->BitWidth < 8) 1279 gas->BitWidth = 8; 1280 1281 /* Validate the address after we're sure we support the space. */ 1282 if (gas->Address == 0 || gas->BitWidth == 0) 1283 return (EINVAL); 1284 1285 bus_set_resource(dev, res_type, *rid, gas->Address, 1286 gas->BitWidth / 8); 1287 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1288 if (*res != NULL) { 1289 *type = res_type; 1290 error = 0; 1291 } else 1292 bus_delete_resource(dev, res_type, *rid); 1293 1294 return (error); 1295 } 1296 1297 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1298 static uint32_t 1299 acpi_isa_get_logicalid(device_t dev) 1300 { 1301 ACPI_DEVICE_INFO *devinfo; 1302 ACPI_BUFFER buf; 1303 ACPI_HANDLE h; 1304 ACPI_STATUS error; 1305 u_int32_t pnpid; 1306 1307 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1308 1309 pnpid = 0; 1310 buf.Pointer = NULL; 1311 buf.Length = ACPI_ALLOCATE_BUFFER; 1312 1313 /* Fetch and validate the HID. */ 1314 if ((h = acpi_get_handle(dev)) == NULL) 1315 goto out; 1316 error = AcpiGetObjectInfo(h, &buf); 1317 if (ACPI_FAILURE(error)) 1318 goto out; 1319 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1320 1321 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1322 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1323 1324 out: 1325 if (buf.Pointer != NULL) 1326 AcpiOsFree(buf.Pointer); 1327 return_VALUE (pnpid); 1328 } 1329 1330 static int 1331 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1332 { 1333 ACPI_DEVICE_INFO *devinfo; 1334 ACPI_BUFFER buf; 1335 ACPI_HANDLE h; 1336 ACPI_STATUS error; 1337 uint32_t *pnpid; 1338 int valid, i; 1339 1340 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1341 1342 pnpid = cids; 1343 valid = 0; 1344 buf.Pointer = NULL; 1345 buf.Length = ACPI_ALLOCATE_BUFFER; 1346 1347 /* Fetch and validate the CID */ 1348 if ((h = acpi_get_handle(dev)) == NULL) 1349 goto out; 1350 error = AcpiGetObjectInfo(h, &buf); 1351 if (ACPI_FAILURE(error)) 1352 goto out; 1353 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1354 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1355 goto out; 1356 1357 if (devinfo->CompatibilityId.Count < count) 1358 count = devinfo->CompatibilityId.Count; 1359 for (i = 0; i < count; i++) { 1360 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1361 continue; 1362 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1363 valid++; 1364 } 1365 1366 out: 1367 if (buf.Pointer != NULL) 1368 AcpiOsFree(buf.Pointer); 1369 return_VALUE (valid); 1370 } 1371 1372 static char * 1373 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1374 { 1375 ACPI_HANDLE h; 1376 int i; 1377 1378 h = acpi_get_handle(dev); 1379 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1380 return (NULL); 1381 1382 /* Try to match one of the array of IDs with a HID or CID. */ 1383 for (i = 0; ids[i] != NULL; i++) { 1384 if (acpi_MatchHid(h, ids[i])) 1385 return (ids[i]); 1386 } 1387 return (NULL); 1388 } 1389 1390 static ACPI_STATUS 1391 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1392 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1393 { 1394 ACPI_HANDLE h; 1395 1396 if (dev == NULL) 1397 h = ACPI_ROOT_OBJECT; 1398 else if ((h = acpi_get_handle(dev)) == NULL) 1399 return (AE_BAD_PARAMETER); 1400 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1401 } 1402 1403 static int 1404 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1405 { 1406 struct acpi_softc *sc; 1407 ACPI_HANDLE handle; 1408 ACPI_STATUS status; 1409 char sxd[8]; 1410 int error; 1411 1412 sc = device_get_softc(bus); 1413 handle = acpi_get_handle(dev); 1414 1415 /* 1416 * XXX If we find these devices, don't try to power them down. 1417 * The serial and IRDA ports on my T23 hang the system when 1418 * set to D3 and it appears that such legacy devices may 1419 * need special handling in their drivers. 1420 */ 1421 if (handle == NULL || 1422 acpi_MatchHid(handle, "PNP0500") || 1423 acpi_MatchHid(handle, "PNP0501") || 1424 acpi_MatchHid(handle, "PNP0502") || 1425 acpi_MatchHid(handle, "PNP0510") || 1426 acpi_MatchHid(handle, "PNP0511")) 1427 return (ENXIO); 1428 1429 /* 1430 * Override next state with the value from _SxD, if present. If no 1431 * dstate argument was provided, don't fetch the return value. 1432 */ 1433 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1434 if (dstate) 1435 status = acpi_GetInteger(handle, sxd, dstate); 1436 else 1437 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1438 1439 switch (status) { 1440 case AE_OK: 1441 error = 0; 1442 break; 1443 case AE_NOT_FOUND: 1444 error = ESRCH; 1445 break; 1446 default: 1447 error = ENXIO; 1448 break; 1449 } 1450 1451 return (error); 1452 } 1453 1454 /* Callback arg for our implementation of walking the namespace. */ 1455 struct acpi_device_scan_ctx { 1456 acpi_scan_cb_t user_fn; 1457 void *arg; 1458 ACPI_HANDLE parent; 1459 }; 1460 1461 static ACPI_STATUS 1462 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1463 { 1464 struct acpi_device_scan_ctx *ctx; 1465 device_t dev, old_dev; 1466 ACPI_STATUS status; 1467 ACPI_OBJECT_TYPE type; 1468 1469 /* 1470 * Skip this device if we think we'll have trouble with it or it is 1471 * the parent where the scan began. 1472 */ 1473 ctx = (struct acpi_device_scan_ctx *)arg; 1474 if (acpi_avoid(h) || h == ctx->parent) 1475 return (AE_OK); 1476 1477 /* If this is not a valid device type (e.g., a method), skip it. */ 1478 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1479 return (AE_OK); 1480 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1481 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1482 return (AE_OK); 1483 1484 /* 1485 * Call the user function with the current device. If it is unchanged 1486 * afterwards, return. Otherwise, we update the handle to the new dev. 1487 */ 1488 old_dev = acpi_get_device(h); 1489 dev = old_dev; 1490 status = ctx->user_fn(h, &dev, level, ctx->arg); 1491 if (ACPI_FAILURE(status) || old_dev == dev) 1492 return (status); 1493 1494 /* Remove the old child and its connection to the handle. */ 1495 if (old_dev != NULL) { 1496 device_delete_child(device_get_parent(old_dev), old_dev); 1497 AcpiDetachData(h, acpi_fake_objhandler); 1498 } 1499 1500 /* Recreate the handle association if the user created a device. */ 1501 if (dev != NULL) 1502 AcpiAttachData(h, acpi_fake_objhandler, dev); 1503 1504 return (AE_OK); 1505 } 1506 1507 static ACPI_STATUS 1508 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1509 acpi_scan_cb_t user_fn, void *arg) 1510 { 1511 ACPI_HANDLE h; 1512 struct acpi_device_scan_ctx ctx; 1513 1514 if (acpi_disabled("children")) 1515 return (AE_OK); 1516 1517 if (dev == NULL) 1518 h = ACPI_ROOT_OBJECT; 1519 else if ((h = acpi_get_handle(dev)) == NULL) 1520 return (AE_BAD_PARAMETER); 1521 ctx.user_fn = user_fn; 1522 ctx.arg = arg; 1523 ctx.parent = h; 1524 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1525 acpi_device_scan_cb, &ctx, NULL)); 1526 } 1527 1528 /* 1529 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1530 * device power states since it's close enough to ACPI. 1531 */ 1532 static int 1533 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1534 { 1535 ACPI_HANDLE h; 1536 ACPI_STATUS status; 1537 int error; 1538 1539 error = 0; 1540 h = acpi_get_handle(child); 1541 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX) 1542 return (EINVAL); 1543 if (h == NULL) 1544 return (0); 1545 1546 /* Ignore errors if the power methods aren't present. */ 1547 status = acpi_pwr_switch_consumer(h, state); 1548 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1549 && status != AE_BAD_PARAMETER) 1550 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1551 state, acpi_name(h), AcpiFormatException(status)); 1552 1553 return (error); 1554 } 1555 1556 static int 1557 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1558 { 1559 int result, cid_count, i; 1560 uint32_t lid, cids[8]; 1561 1562 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1563 1564 /* 1565 * ISA-style drivers attached to ACPI may persist and 1566 * probe manually if we return ENOENT. We never want 1567 * that to happen, so don't ever return it. 1568 */ 1569 result = ENXIO; 1570 1571 /* Scan the supplied IDs for a match */ 1572 lid = acpi_isa_get_logicalid(child); 1573 cid_count = acpi_isa_get_compatid(child, cids, 8); 1574 while (ids && ids->ip_id) { 1575 if (lid == ids->ip_id) { 1576 result = 0; 1577 goto out; 1578 } 1579 for (i = 0; i < cid_count; i++) { 1580 if (cids[i] == ids->ip_id) { 1581 result = 0; 1582 goto out; 1583 } 1584 } 1585 ids++; 1586 } 1587 1588 out: 1589 if (result == 0 && ids->ip_desc) 1590 device_set_desc(child, ids->ip_desc); 1591 1592 return_VALUE (result); 1593 } 1594 1595 #if defined(__i386__) || defined(__amd64__) 1596 /* 1597 * Look for a MCFG table. If it is present, use the settings for 1598 * domain (segment) 0 to setup PCI config space access via the memory 1599 * map. 1600 */ 1601 static void 1602 acpi_enable_pcie(void) 1603 { 1604 ACPI_TABLE_HEADER *hdr; 1605 ACPI_MCFG_ALLOCATION *alloc, *end; 1606 ACPI_STATUS status; 1607 1608 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1609 if (ACPI_FAILURE(status)) 1610 return; 1611 1612 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1613 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1614 while (alloc < end) { 1615 if (alloc->PciSegment == 0) { 1616 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1617 alloc->EndBusNumber); 1618 return; 1619 } 1620 alloc++; 1621 } 1622 } 1623 #endif 1624 1625 /* 1626 * Scan all of the ACPI namespace and attach child devices. 1627 * 1628 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1629 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1630 * However, in violation of the spec, some systems place their PCI link 1631 * devices in \, so we have to walk the whole namespace. We check the 1632 * type of namespace nodes, so this should be ok. 1633 */ 1634 static void 1635 acpi_probe_children(device_t bus) 1636 { 1637 1638 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1639 1640 /* 1641 * Scan the namespace and insert placeholders for all the devices that 1642 * we find. We also probe/attach any early devices. 1643 * 1644 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1645 * we want to create nodes for all devices, not just those that are 1646 * currently present. (This assumes that we don't want to create/remove 1647 * devices as they appear, which might be smarter.) 1648 */ 1649 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1650 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1651 bus, NULL); 1652 1653 /* Pre-allocate resources for our rman from any sysresource devices. */ 1654 acpi_sysres_alloc(bus); 1655 1656 /* Create any static children by calling device identify methods. */ 1657 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1658 bus_generic_probe(bus); 1659 1660 /* Probe/attach all children, created staticly and from the namespace. */ 1661 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1662 bus_generic_attach(bus); 1663 1664 /* 1665 * Some of these children may have attached others as part of their attach 1666 * process (eg. the root PCI bus driver), so rescan. 1667 */ 1668 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1669 bus_generic_attach(bus); 1670 1671 /* Attach wake sysctls. */ 1672 acpi_wake_sysctl_walk(bus); 1673 1674 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1675 return_VOID; 1676 } 1677 1678 /* 1679 * Determine the probe order for a given device. 1680 */ 1681 static void 1682 acpi_probe_order(ACPI_HANDLE handle, int *order) 1683 { 1684 ACPI_OBJECT_TYPE type; 1685 1686 /* 1687 * 1. I/O port and memory system resource holders 1688 * 2. Embedded controllers (to handle early accesses) 1689 * 3. PCI Link Devices 1690 * 100000. CPUs 1691 */ 1692 AcpiGetType(handle, &type); 1693 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1694 *order = 1; 1695 else if (acpi_MatchHid(handle, "PNP0C09")) 1696 *order = 2; 1697 else if (acpi_MatchHid(handle, "PNP0C0F")) 1698 *order = 3; 1699 else if (type == ACPI_TYPE_PROCESSOR) 1700 *order = 100000; 1701 } 1702 1703 /* 1704 * Evaluate a child device and determine whether we might attach a device to 1705 * it. 1706 */ 1707 static ACPI_STATUS 1708 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1709 { 1710 ACPI_OBJECT_TYPE type; 1711 ACPI_HANDLE h; 1712 device_t bus, child; 1713 int order; 1714 char *handle_str, **search; 1715 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1716 1717 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1718 1719 /* Skip this device if we think we'll have trouble with it. */ 1720 if (acpi_avoid(handle)) 1721 return_ACPI_STATUS (AE_OK); 1722 1723 bus = (device_t)context; 1724 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1725 switch (type) { 1726 case ACPI_TYPE_DEVICE: 1727 case ACPI_TYPE_PROCESSOR: 1728 case ACPI_TYPE_THERMAL: 1729 case ACPI_TYPE_POWER: 1730 if (acpi_disabled("children")) 1731 break; 1732 1733 /* 1734 * Since we scan from \, be sure to skip system scope objects. 1735 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1736 */ 1737 handle_str = acpi_name(handle); 1738 for (search = scopes; *search != NULL; search++) { 1739 if (strcmp(handle_str, *search) == 0) 1740 break; 1741 } 1742 if (*search != NULL) 1743 break; 1744 1745 /* 1746 * Create a placeholder device for this node. Sort the 1747 * placeholder so that the probe/attach passes will run 1748 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1749 * are reserved for special objects (i.e., system 1750 * resources). CPU devices have a very high order to 1751 * ensure they are probed after other devices. 1752 */ 1753 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1754 order = level * 10 + 100; 1755 acpi_probe_order(handle, &order); 1756 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1757 if (child == NULL) 1758 break; 1759 1760 /* Associate the handle with the device_t and vice versa. */ 1761 acpi_set_handle(child, handle); 1762 AcpiAttachData(handle, acpi_fake_objhandler, child); 1763 1764 /* 1765 * Check that the device is present. If it's not present, 1766 * leave it disabled (so that we have a device_t attached to 1767 * the handle, but we don't probe it). 1768 * 1769 * XXX PCI link devices sometimes report "present" but not 1770 * "functional" (i.e. if disabled). Go ahead and probe them 1771 * anyway since we may enable them later. 1772 */ 1773 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1774 /* Never disable PCI link devices. */ 1775 if (acpi_MatchHid(handle, "PNP0C0F")) 1776 break; 1777 /* 1778 * Docking stations should remain enabled since the system 1779 * may be undocked at boot. 1780 */ 1781 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1782 break; 1783 1784 device_disable(child); 1785 break; 1786 } 1787 1788 /* 1789 * Get the device's resource settings and attach them. 1790 * Note that if the device has _PRS but no _CRS, we need 1791 * to decide when it's appropriate to try to configure the 1792 * device. Ignore the return value here; it's OK for the 1793 * device not to have any resources. 1794 */ 1795 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1796 break; 1797 } 1798 } 1799 1800 return_ACPI_STATUS (AE_OK); 1801 } 1802 1803 /* 1804 * AcpiAttachData() requires an object handler but never uses it. This is a 1805 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1806 */ 1807 void 1808 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1809 { 1810 } 1811 1812 static void 1813 acpi_shutdown_final(void *arg, int howto) 1814 { 1815 struct acpi_softc *sc = (struct acpi_softc *)arg; 1816 ACPI_STATUS status; 1817 1818 /* 1819 * XXX Shutdown code should only run on the BSP (cpuid 0). 1820 * Some chipsets do not power off the system correctly if called from 1821 * an AP. 1822 */ 1823 if ((howto & RB_POWEROFF) != 0) { 1824 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1825 if (ACPI_FAILURE(status)) { 1826 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1827 AcpiFormatException(status)); 1828 return; 1829 } 1830 device_printf(sc->acpi_dev, "Powering system off\n"); 1831 ACPI_DISABLE_IRQS(); 1832 status = AcpiEnterSleepState(ACPI_STATE_S5); 1833 if (ACPI_FAILURE(status)) 1834 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1835 AcpiFormatException(status)); 1836 else { 1837 DELAY(1000000); 1838 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1839 } 1840 } else if ((howto & RB_HALT) == 0 && 1841 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1842 sc->acpi_handle_reboot) { 1843 /* Reboot using the reset register. */ 1844 status = AcpiWrite( 1845 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1846 if (ACPI_FAILURE(status)) 1847 device_printf(sc->acpi_dev, "reset failed - %s\n", 1848 AcpiFormatException(status)); 1849 else { 1850 DELAY(1000000); 1851 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1852 } 1853 } else if (sc->acpi_do_disable && panicstr == NULL) { 1854 /* 1855 * Only disable ACPI if the user requested. On some systems, writing 1856 * the disable value to SMI_CMD hangs the system. 1857 */ 1858 device_printf(sc->acpi_dev, "Shutting down\n"); 1859 AcpiTerminate(); 1860 } 1861 } 1862 1863 static void 1864 acpi_enable_fixed_events(struct acpi_softc *sc) 1865 { 1866 static int first_time = 1; 1867 1868 /* Enable and clear fixed events and install handlers. */ 1869 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1870 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1871 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1872 acpi_event_power_button_sleep, sc); 1873 if (first_time) 1874 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1875 } 1876 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1877 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1878 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1879 acpi_event_sleep_button_sleep, sc); 1880 if (first_time) 1881 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1882 } 1883 1884 first_time = 0; 1885 } 1886 1887 /* 1888 * Returns true if the device is actually present and should 1889 * be attached to. This requires the present, enabled, UI-visible 1890 * and diagnostics-passed bits to be set. 1891 */ 1892 BOOLEAN 1893 acpi_DeviceIsPresent(device_t dev) 1894 { 1895 ACPI_DEVICE_INFO *devinfo; 1896 ACPI_HANDLE h; 1897 ACPI_BUFFER buf; 1898 ACPI_STATUS error; 1899 int ret; 1900 1901 ret = FALSE; 1902 if ((h = acpi_get_handle(dev)) == NULL) 1903 return (FALSE); 1904 buf.Pointer = NULL; 1905 buf.Length = ACPI_ALLOCATE_BUFFER; 1906 error = AcpiGetObjectInfo(h, &buf); 1907 if (ACPI_FAILURE(error)) 1908 return (FALSE); 1909 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1910 1911 /* If no _STA method, must be present */ 1912 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1913 ret = TRUE; 1914 1915 /* Return true for 'present' and 'functioning' */ 1916 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1917 ret = TRUE; 1918 1919 AcpiOsFree(buf.Pointer); 1920 return (ret); 1921 } 1922 1923 /* 1924 * Returns true if the battery is actually present and inserted. 1925 */ 1926 BOOLEAN 1927 acpi_BatteryIsPresent(device_t dev) 1928 { 1929 ACPI_DEVICE_INFO *devinfo; 1930 ACPI_HANDLE h; 1931 ACPI_BUFFER buf; 1932 ACPI_STATUS error; 1933 int ret; 1934 1935 ret = FALSE; 1936 if ((h = acpi_get_handle(dev)) == NULL) 1937 return (FALSE); 1938 buf.Pointer = NULL; 1939 buf.Length = ACPI_ALLOCATE_BUFFER; 1940 error = AcpiGetObjectInfo(h, &buf); 1941 if (ACPI_FAILURE(error)) 1942 return (FALSE); 1943 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1944 1945 /* If no _STA method, must be present */ 1946 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1947 ret = TRUE; 1948 1949 /* Return true for 'present', 'battery present', and 'functioning' */ 1950 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1951 ret = TRUE; 1952 1953 AcpiOsFree(buf.Pointer); 1954 return (ret); 1955 } 1956 1957 /* 1958 * Match a HID string against a handle 1959 */ 1960 static BOOLEAN 1961 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1962 { 1963 ACPI_DEVICE_INFO *devinfo; 1964 ACPI_BUFFER buf; 1965 ACPI_STATUS error; 1966 int ret, i; 1967 1968 ret = FALSE; 1969 if (hid == NULL || h == NULL) 1970 return (ret); 1971 buf.Pointer = NULL; 1972 buf.Length = ACPI_ALLOCATE_BUFFER; 1973 error = AcpiGetObjectInfo(h, &buf); 1974 if (ACPI_FAILURE(error)) 1975 return (ret); 1976 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1977 1978 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1979 strcmp(hid, devinfo->HardwareId.Value) == 0) 1980 ret = TRUE; 1981 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1982 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1983 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1984 ret = TRUE; 1985 break; 1986 } 1987 } 1988 } 1989 1990 AcpiOsFree(buf.Pointer); 1991 return (ret); 1992 } 1993 1994 /* 1995 * Return the handle of a named object within our scope, ie. that of (parent) 1996 * or one if its parents. 1997 */ 1998 ACPI_STATUS 1999 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2000 { 2001 ACPI_HANDLE r; 2002 ACPI_STATUS status; 2003 2004 /* Walk back up the tree to the root */ 2005 for (;;) { 2006 status = AcpiGetHandle(parent, path, &r); 2007 if (ACPI_SUCCESS(status)) { 2008 *result = r; 2009 return (AE_OK); 2010 } 2011 /* XXX Return error here? */ 2012 if (status != AE_NOT_FOUND) 2013 return (AE_OK); 2014 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2015 return (AE_NOT_FOUND); 2016 parent = r; 2017 } 2018 } 2019 2020 /* Find the difference between two PM tick counts. */ 2021 uint32_t 2022 acpi_TimerDelta(uint32_t end, uint32_t start) 2023 { 2024 uint32_t delta; 2025 2026 if (end >= start) 2027 delta = end - start; 2028 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 2029 delta = ((0xFFFFFFFF - start) + end + 1); 2030 else 2031 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 2032 return (delta); 2033 } 2034 2035 /* 2036 * Allocate a buffer with a preset data size. 2037 */ 2038 ACPI_BUFFER * 2039 acpi_AllocBuffer(int size) 2040 { 2041 ACPI_BUFFER *buf; 2042 2043 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2044 return (NULL); 2045 buf->Length = size; 2046 buf->Pointer = (void *)(buf + 1); 2047 return (buf); 2048 } 2049 2050 ACPI_STATUS 2051 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2052 { 2053 ACPI_OBJECT arg1; 2054 ACPI_OBJECT_LIST args; 2055 2056 arg1.Type = ACPI_TYPE_INTEGER; 2057 arg1.Integer.Value = number; 2058 args.Count = 1; 2059 args.Pointer = &arg1; 2060 2061 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2062 } 2063 2064 /* 2065 * Evaluate a path that should return an integer. 2066 */ 2067 ACPI_STATUS 2068 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2069 { 2070 ACPI_STATUS status; 2071 ACPI_BUFFER buf; 2072 ACPI_OBJECT param; 2073 2074 if (handle == NULL) 2075 handle = ACPI_ROOT_OBJECT; 2076 2077 /* 2078 * Assume that what we've been pointed at is an Integer object, or 2079 * a method that will return an Integer. 2080 */ 2081 buf.Pointer = ¶m; 2082 buf.Length = sizeof(param); 2083 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2084 if (ACPI_SUCCESS(status)) { 2085 if (param.Type == ACPI_TYPE_INTEGER) 2086 *number = param.Integer.Value; 2087 else 2088 status = AE_TYPE; 2089 } 2090 2091 /* 2092 * In some applications, a method that's expected to return an Integer 2093 * may instead return a Buffer (probably to simplify some internal 2094 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2095 * convert it into an Integer as best we can. 2096 * 2097 * This is a hack. 2098 */ 2099 if (status == AE_BUFFER_OVERFLOW) { 2100 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2101 status = AE_NO_MEMORY; 2102 } else { 2103 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2104 if (ACPI_SUCCESS(status)) 2105 status = acpi_ConvertBufferToInteger(&buf, number); 2106 AcpiOsFree(buf.Pointer); 2107 } 2108 } 2109 return (status); 2110 } 2111 2112 ACPI_STATUS 2113 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2114 { 2115 ACPI_OBJECT *p; 2116 UINT8 *val; 2117 int i; 2118 2119 p = (ACPI_OBJECT *)bufp->Pointer; 2120 if (p->Type == ACPI_TYPE_INTEGER) { 2121 *number = p->Integer.Value; 2122 return (AE_OK); 2123 } 2124 if (p->Type != ACPI_TYPE_BUFFER) 2125 return (AE_TYPE); 2126 if (p->Buffer.Length > sizeof(int)) 2127 return (AE_BAD_DATA); 2128 2129 *number = 0; 2130 val = p->Buffer.Pointer; 2131 for (i = 0; i < p->Buffer.Length; i++) 2132 *number += val[i] << (i * 8); 2133 return (AE_OK); 2134 } 2135 2136 /* 2137 * Iterate over the elements of an a package object, calling the supplied 2138 * function for each element. 2139 * 2140 * XXX possible enhancement might be to abort traversal on error. 2141 */ 2142 ACPI_STATUS 2143 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2144 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2145 { 2146 ACPI_OBJECT *comp; 2147 int i; 2148 2149 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2150 return (AE_BAD_PARAMETER); 2151 2152 /* Iterate over components */ 2153 i = 0; 2154 comp = pkg->Package.Elements; 2155 for (; i < pkg->Package.Count; i++, comp++) 2156 func(comp, arg); 2157 2158 return (AE_OK); 2159 } 2160 2161 /* 2162 * Find the (index)th resource object in a set. 2163 */ 2164 ACPI_STATUS 2165 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2166 { 2167 ACPI_RESOURCE *rp; 2168 int i; 2169 2170 rp = (ACPI_RESOURCE *)buf->Pointer; 2171 i = index; 2172 while (i-- > 0) { 2173 /* Range check */ 2174 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2175 return (AE_BAD_PARAMETER); 2176 2177 /* Check for terminator */ 2178 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2179 return (AE_NOT_FOUND); 2180 rp = ACPI_NEXT_RESOURCE(rp); 2181 } 2182 if (resp != NULL) 2183 *resp = rp; 2184 2185 return (AE_OK); 2186 } 2187 2188 /* 2189 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2190 * 2191 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2192 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2193 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2194 * resources. 2195 */ 2196 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2197 2198 ACPI_STATUS 2199 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2200 { 2201 ACPI_RESOURCE *rp; 2202 void *newp; 2203 2204 /* Initialise the buffer if necessary. */ 2205 if (buf->Pointer == NULL) { 2206 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2207 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2208 return (AE_NO_MEMORY); 2209 rp = (ACPI_RESOURCE *)buf->Pointer; 2210 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2211 rp->Length = 0; 2212 } 2213 if (res == NULL) 2214 return (AE_OK); 2215 2216 /* 2217 * Scan the current buffer looking for the terminator. 2218 * This will either find the terminator or hit the end 2219 * of the buffer and return an error. 2220 */ 2221 rp = (ACPI_RESOURCE *)buf->Pointer; 2222 for (;;) { 2223 /* Range check, don't go outside the buffer */ 2224 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2225 return (AE_BAD_PARAMETER); 2226 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2227 break; 2228 rp = ACPI_NEXT_RESOURCE(rp); 2229 } 2230 2231 /* 2232 * Check the size of the buffer and expand if required. 2233 * 2234 * Required size is: 2235 * size of existing resources before terminator + 2236 * size of new resource and header + 2237 * size of terminator. 2238 * 2239 * Note that this loop should really only run once, unless 2240 * for some reason we are stuffing a *really* huge resource. 2241 */ 2242 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2243 res->Length + ACPI_RS_SIZE_NO_DATA + 2244 ACPI_RS_SIZE_MIN) >= buf->Length) { 2245 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2246 return (AE_NO_MEMORY); 2247 bcopy(buf->Pointer, newp, buf->Length); 2248 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2249 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2250 AcpiOsFree(buf->Pointer); 2251 buf->Pointer = newp; 2252 buf->Length += buf->Length; 2253 } 2254 2255 /* Insert the new resource. */ 2256 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2257 2258 /* And add the terminator. */ 2259 rp = ACPI_NEXT_RESOURCE(rp); 2260 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2261 rp->Length = 0; 2262 2263 return (AE_OK); 2264 } 2265 2266 /* 2267 * Set interrupt model. 2268 */ 2269 ACPI_STATUS 2270 acpi_SetIntrModel(int model) 2271 { 2272 2273 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2274 } 2275 2276 /* 2277 * DEPRECATED. This interface has serious deficiencies and will be 2278 * removed. 2279 * 2280 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2281 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2282 */ 2283 ACPI_STATUS 2284 acpi_SetSleepState(struct acpi_softc *sc, int state) 2285 { 2286 static int once; 2287 2288 if (!once) { 2289 device_printf(sc->acpi_dev, 2290 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2291 once = 1; 2292 } 2293 return (acpi_EnterSleepState(sc, state)); 2294 } 2295 2296 #if defined(__amd64__) || defined(__i386__) 2297 static void 2298 acpi_sleep_force(void *arg) 2299 { 2300 struct acpi_softc *sc = (struct acpi_softc *)arg; 2301 2302 device_printf(sc->acpi_dev, 2303 "suspend request timed out, forcing sleep now\n"); 2304 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2305 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2306 sc->acpi_next_sstate); 2307 } 2308 #endif 2309 2310 /* 2311 * Request that the system enter the given suspend state. All /dev/apm 2312 * devices and devd(8) will be notified. Userland then has a chance to 2313 * save state and acknowledge the request. The system sleeps once all 2314 * acks are in. 2315 */ 2316 int 2317 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2318 { 2319 #if defined(__i386__) 2320 struct apm_clone_data *clone; 2321 #endif 2322 2323 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2324 return (EINVAL); 2325 if (!acpi_sleep_states[state]) 2326 return (EOPNOTSUPP); 2327 2328 /* S5 (soft-off) should be entered directly with no waiting. */ 2329 if (state == ACPI_STATE_S5) { 2330 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2331 return (0); 2332 else 2333 return (ENXIO); 2334 } 2335 2336 #if defined(__amd64__) || defined(__i386__) 2337 /* If a suspend request is already in progress, just return. */ 2338 ACPI_LOCK(acpi); 2339 if (sc->acpi_next_sstate != 0) { 2340 ACPI_UNLOCK(acpi); 2341 return (0); 2342 } 2343 2344 /* Record the pending state and notify all apm devices. */ 2345 sc->acpi_next_sstate = state; 2346 #if defined(__i386__) 2347 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2348 clone->notify_status = APM_EV_NONE; 2349 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2350 selwakeuppri(&clone->sel_read, PZERO); 2351 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2352 } 2353 } 2354 #endif 2355 2356 /* If devd(8) is not running, immediately enter the sleep state. */ 2357 if (!devctl_process_running()) { 2358 ACPI_UNLOCK(acpi); 2359 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2360 return (0); 2361 } else { 2362 return (ENXIO); 2363 } 2364 } 2365 2366 /* 2367 * Set a timeout to fire if userland doesn't ack the suspend request 2368 * in time. This way we still eventually go to sleep if we were 2369 * overheating or running low on battery, even if userland is hung. 2370 * We cancel this timeout once all userland acks are in or the 2371 * suspend request is aborted. 2372 */ 2373 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2374 ACPI_UNLOCK(acpi); 2375 2376 /* Now notify devd(8) also. */ 2377 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2378 2379 return (0); 2380 #else 2381 /* This platform does not support acpi suspend/resume. */ 2382 return (EOPNOTSUPP); 2383 #endif 2384 } 2385 2386 /* 2387 * Acknowledge (or reject) a pending sleep state. The caller has 2388 * prepared for suspend and is now ready for it to proceed. If the 2389 * error argument is non-zero, it indicates suspend should be cancelled 2390 * and gives an errno value describing why. Once all votes are in, 2391 * we suspend the system. 2392 */ 2393 int 2394 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2395 { 2396 #if defined(__amd64__) || defined(__i386__) 2397 struct acpi_softc *sc; 2398 int ret, sleeping; 2399 2400 /* If no pending sleep state, return an error. */ 2401 ACPI_LOCK(acpi); 2402 sc = clone->acpi_sc; 2403 if (sc->acpi_next_sstate == 0) { 2404 ACPI_UNLOCK(acpi); 2405 return (ENXIO); 2406 } 2407 2408 /* Caller wants to abort suspend process. */ 2409 if (error) { 2410 sc->acpi_next_sstate = 0; 2411 callout_stop(&sc->susp_force_to); 2412 device_printf(sc->acpi_dev, 2413 "listener on %s cancelled the pending suspend\n", 2414 devtoname(clone->cdev)); 2415 ACPI_UNLOCK(acpi); 2416 return (0); 2417 } 2418 2419 /* 2420 * Mark this device as acking the suspend request. Then, walk through 2421 * all devices, seeing if they agree yet. We only count devices that 2422 * are writable since read-only devices couldn't ack the request. 2423 */ 2424 sleeping = TRUE; 2425 #if defined(__i386__) 2426 clone->notify_status = APM_EV_ACKED; 2427 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2428 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2429 clone->notify_status != APM_EV_ACKED) { 2430 sleeping = FALSE; 2431 break; 2432 } 2433 } 2434 #endif 2435 2436 /* If all devices have voted "yes", we will suspend now. */ 2437 if (sleeping) 2438 callout_stop(&sc->susp_force_to); 2439 ACPI_UNLOCK(acpi); 2440 ret = 0; 2441 if (sleeping) { 2442 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2443 ret = ENODEV; 2444 } 2445 return (ret); 2446 #else 2447 /* This platform does not support acpi suspend/resume. */ 2448 return (EOPNOTSUPP); 2449 #endif 2450 } 2451 2452 static void 2453 acpi_sleep_enable(void *arg) 2454 { 2455 struct acpi_softc *sc = (struct acpi_softc *)arg; 2456 2457 /* Reschedule if the system is not fully up and running. */ 2458 if (!AcpiGbl_SystemAwakeAndRunning) { 2459 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2460 return; 2461 } 2462 2463 ACPI_LOCK(acpi); 2464 sc->acpi_sleep_disabled = FALSE; 2465 ACPI_UNLOCK(acpi); 2466 } 2467 2468 static ACPI_STATUS 2469 acpi_sleep_disable(struct acpi_softc *sc) 2470 { 2471 ACPI_STATUS status; 2472 2473 /* Fail if the system is not fully up and running. */ 2474 if (!AcpiGbl_SystemAwakeAndRunning) 2475 return (AE_ERROR); 2476 2477 ACPI_LOCK(acpi); 2478 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK; 2479 sc->acpi_sleep_disabled = TRUE; 2480 ACPI_UNLOCK(acpi); 2481 2482 return (status); 2483 } 2484 2485 enum acpi_sleep_state { 2486 ACPI_SS_NONE, 2487 ACPI_SS_GPE_SET, 2488 ACPI_SS_DEV_SUSPEND, 2489 ACPI_SS_SLP_PREP, 2490 ACPI_SS_SLEPT, 2491 }; 2492 2493 /* 2494 * Enter the desired system sleep state. 2495 * 2496 * Currently we support S1-S5 but S4 is only S4BIOS 2497 */ 2498 static ACPI_STATUS 2499 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2500 { 2501 ACPI_STATUS status; 2502 enum acpi_sleep_state slp_state; 2503 2504 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2505 2506 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX) 2507 return_ACPI_STATUS (AE_BAD_PARAMETER); 2508 if (!acpi_sleep_states[state]) { 2509 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n", 2510 state); 2511 return (AE_SUPPORT); 2512 } 2513 2514 /* Re-entry once we're suspending is not allowed. */ 2515 status = acpi_sleep_disable(sc); 2516 if (ACPI_FAILURE(status)) { 2517 device_printf(sc->acpi_dev, 2518 "suspend request ignored (not ready yet)\n"); 2519 return (status); 2520 } 2521 2522 if (state == ACPI_STATE_S5) { 2523 /* 2524 * Shut down cleanly and power off. This will call us back through the 2525 * shutdown handlers. 2526 */ 2527 shutdown_nice(RB_POWEROFF); 2528 return_ACPI_STATUS (AE_OK); 2529 } 2530 2531 #ifdef SMP 2532 thread_lock(curthread); 2533 sched_bind(curthread, 0); 2534 thread_unlock(curthread); 2535 #endif 2536 2537 /* 2538 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2539 * drivers need this. 2540 */ 2541 mtx_lock(&Giant); 2542 2543 slp_state = ACPI_SS_NONE; 2544 2545 sc->acpi_sstate = state; 2546 2547 /* Enable any GPEs as appropriate and requested by the user. */ 2548 acpi_wake_prep_walk(state); 2549 slp_state = ACPI_SS_GPE_SET; 2550 2551 /* 2552 * Inform all devices that we are going to sleep. If at least one 2553 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2554 * 2555 * XXX Note that a better two-pass approach with a 'veto' pass 2556 * followed by a "real thing" pass would be better, but the current 2557 * bus interface does not provide for this. 2558 */ 2559 if (DEVICE_SUSPEND(root_bus) != 0) { 2560 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2561 goto backout; 2562 } 2563 slp_state = ACPI_SS_DEV_SUSPEND; 2564 2565 /* If testing device suspend only, back out of everything here. */ 2566 if (acpi_susp_bounce) 2567 goto backout; 2568 2569 status = AcpiEnterSleepStatePrep(state); 2570 if (ACPI_FAILURE(status)) { 2571 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2572 AcpiFormatException(status)); 2573 goto backout; 2574 } 2575 slp_state = ACPI_SS_SLP_PREP; 2576 2577 if (sc->acpi_sleep_delay > 0) 2578 DELAY(sc->acpi_sleep_delay * 1000000); 2579 2580 if (state != ACPI_STATE_S1) { 2581 acpi_sleep_machdep(sc, state); 2582 2583 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2584 if (state == ACPI_STATE_S4) 2585 AcpiEnable(); 2586 } else { 2587 ACPI_DISABLE_IRQS(); 2588 status = AcpiEnterSleepState(state); 2589 if (ACPI_FAILURE(status)) { 2590 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2591 AcpiFormatException(status)); 2592 goto backout; 2593 } 2594 } 2595 slp_state = ACPI_SS_SLEPT; 2596 2597 /* 2598 * Back out state according to how far along we got in the suspend 2599 * process. This handles both the error and success cases. 2600 */ 2601 backout: 2602 sc->acpi_next_sstate = 0; 2603 if (slp_state >= ACPI_SS_GPE_SET) { 2604 acpi_wake_prep_walk(state); 2605 sc->acpi_sstate = ACPI_STATE_S0; 2606 } 2607 if (slp_state >= ACPI_SS_SLP_PREP) 2608 AcpiLeaveSleepState(state); 2609 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2610 DEVICE_RESUME(root_bus); 2611 if (slp_state >= ACPI_SS_SLEPT) 2612 acpi_enable_fixed_events(sc); 2613 2614 mtx_unlock(&Giant); 2615 2616 #ifdef SMP 2617 thread_lock(curthread); 2618 sched_unbind(curthread); 2619 thread_unlock(curthread); 2620 #endif 2621 2622 /* Allow another sleep request after a while. */ 2623 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2624 2625 /* Run /etc/rc.resume after we are back. */ 2626 if (devctl_process_running()) 2627 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2628 2629 return_ACPI_STATUS (status); 2630 } 2631 2632 void 2633 acpi_resync_clock(struct acpi_softc *sc) 2634 { 2635 2636 if (!acpi_reset_clock) 2637 return; 2638 2639 /* 2640 * Warm up timecounter again and reset system clock. 2641 */ 2642 (void)timecounter->tc_get_timecount(timecounter); 2643 (void)timecounter->tc_get_timecount(timecounter); 2644 inittodr(time_second + sc->acpi_sleep_delay); 2645 } 2646 2647 /* Initialize a device's wake GPE. */ 2648 int 2649 acpi_wake_init(device_t dev, int type) 2650 { 2651 struct acpi_prw_data prw; 2652 2653 /* Evaluate _PRW to find the GPE. */ 2654 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2655 return (ENXIO); 2656 2657 /* Set the requested type for the GPE (runtime, wake, or both). */ 2658 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2659 device_printf(dev, "set GPE type failed\n"); 2660 return (ENXIO); 2661 } 2662 2663 return (0); 2664 } 2665 2666 /* Enable or disable the device's wake GPE. */ 2667 int 2668 acpi_wake_set_enable(device_t dev, int enable) 2669 { 2670 struct acpi_prw_data prw; 2671 ACPI_STATUS status; 2672 int flags; 2673 2674 /* Make sure the device supports waking the system and get the GPE. */ 2675 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2676 return (ENXIO); 2677 2678 flags = acpi_get_flags(dev); 2679 if (enable) { 2680 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2681 if (ACPI_FAILURE(status)) { 2682 device_printf(dev, "enable wake failed\n"); 2683 return (ENXIO); 2684 } 2685 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2686 } else { 2687 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2688 if (ACPI_FAILURE(status)) { 2689 device_printf(dev, "disable wake failed\n"); 2690 return (ENXIO); 2691 } 2692 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2693 } 2694 2695 return (0); 2696 } 2697 2698 static int 2699 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2700 { 2701 struct acpi_prw_data prw; 2702 device_t dev; 2703 2704 /* Check that this is a wake-capable device and get its GPE. */ 2705 if (acpi_parse_prw(handle, &prw) != 0) 2706 return (ENXIO); 2707 dev = acpi_get_device(handle); 2708 2709 /* 2710 * The destination sleep state must be less than (i.e., higher power) 2711 * or equal to the value specified by _PRW. If this GPE cannot be 2712 * enabled for the next sleep state, then disable it. If it can and 2713 * the user requested it be enabled, turn on any required power resources 2714 * and set _PSW. 2715 */ 2716 if (sstate > prw.lowest_wake) { 2717 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2718 if (bootverbose) 2719 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2720 acpi_name(handle), sstate); 2721 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2722 acpi_pwr_wake_enable(handle, 1); 2723 acpi_SetInteger(handle, "_PSW", 1); 2724 if (bootverbose) 2725 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2726 acpi_name(handle), sstate); 2727 } 2728 2729 return (0); 2730 } 2731 2732 static int 2733 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2734 { 2735 struct acpi_prw_data prw; 2736 device_t dev; 2737 2738 /* 2739 * Check that this is a wake-capable device and get its GPE. Return 2740 * now if the user didn't enable this device for wake. 2741 */ 2742 if (acpi_parse_prw(handle, &prw) != 0) 2743 return (ENXIO); 2744 dev = acpi_get_device(handle); 2745 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2746 return (0); 2747 2748 /* 2749 * If this GPE couldn't be enabled for the previous sleep state, it was 2750 * disabled before going to sleep so re-enable it. If it was enabled, 2751 * clear _PSW and turn off any power resources it used. 2752 */ 2753 if (sstate > prw.lowest_wake) { 2754 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2755 if (bootverbose) 2756 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2757 } else { 2758 acpi_SetInteger(handle, "_PSW", 0); 2759 acpi_pwr_wake_enable(handle, 0); 2760 if (bootverbose) 2761 device_printf(dev, "run_prep cleaned up for %s\n", 2762 acpi_name(handle)); 2763 } 2764 2765 return (0); 2766 } 2767 2768 static ACPI_STATUS 2769 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2770 { 2771 int sstate; 2772 2773 /* If suspending, run the sleep prep function, otherwise wake. */ 2774 sstate = *(int *)context; 2775 if (AcpiGbl_SystemAwakeAndRunning) 2776 acpi_wake_sleep_prep(handle, sstate); 2777 else 2778 acpi_wake_run_prep(handle, sstate); 2779 return (AE_OK); 2780 } 2781 2782 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2783 static int 2784 acpi_wake_prep_walk(int sstate) 2785 { 2786 ACPI_HANDLE sb_handle; 2787 2788 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2789 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2790 acpi_wake_prep, &sstate, NULL); 2791 return (0); 2792 } 2793 2794 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2795 static int 2796 acpi_wake_sysctl_walk(device_t dev) 2797 { 2798 int error, i, numdevs; 2799 device_t *devlist; 2800 device_t child; 2801 ACPI_STATUS status; 2802 2803 error = device_get_children(dev, &devlist, &numdevs); 2804 if (error != 0 || numdevs == 0) { 2805 if (numdevs == 0) 2806 free(devlist, M_TEMP); 2807 return (error); 2808 } 2809 for (i = 0; i < numdevs; i++) { 2810 child = devlist[i]; 2811 acpi_wake_sysctl_walk(child); 2812 if (!device_is_attached(child)) 2813 continue; 2814 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2815 if (ACPI_SUCCESS(status)) { 2816 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2817 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2818 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2819 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2820 } 2821 } 2822 free(devlist, M_TEMP); 2823 2824 return (0); 2825 } 2826 2827 /* Enable or disable wake from userland. */ 2828 static int 2829 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2830 { 2831 int enable, error; 2832 device_t dev; 2833 2834 dev = (device_t)arg1; 2835 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2836 2837 error = sysctl_handle_int(oidp, &enable, 0, req); 2838 if (error != 0 || req->newptr == NULL) 2839 return (error); 2840 if (enable != 0 && enable != 1) 2841 return (EINVAL); 2842 2843 return (acpi_wake_set_enable(dev, enable)); 2844 } 2845 2846 /* Parse a device's _PRW into a structure. */ 2847 int 2848 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2849 { 2850 ACPI_STATUS status; 2851 ACPI_BUFFER prw_buffer; 2852 ACPI_OBJECT *res, *res2; 2853 int error, i, power_count; 2854 2855 if (h == NULL || prw == NULL) 2856 return (EINVAL); 2857 2858 /* 2859 * The _PRW object (7.2.9) is only required for devices that have the 2860 * ability to wake the system from a sleeping state. 2861 */ 2862 error = EINVAL; 2863 prw_buffer.Pointer = NULL; 2864 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2865 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2866 if (ACPI_FAILURE(status)) 2867 return (ENOENT); 2868 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2869 if (res == NULL) 2870 return (ENOENT); 2871 if (!ACPI_PKG_VALID(res, 2)) 2872 goto out; 2873 2874 /* 2875 * Element 1 of the _PRW object: 2876 * The lowest power system sleeping state that can be entered while still 2877 * providing wake functionality. The sleeping state being entered must 2878 * be less than (i.e., higher power) or equal to this value. 2879 */ 2880 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2881 goto out; 2882 2883 /* 2884 * Element 0 of the _PRW object: 2885 */ 2886 switch (res->Package.Elements[0].Type) { 2887 case ACPI_TYPE_INTEGER: 2888 /* 2889 * If the data type of this package element is numeric, then this 2890 * _PRW package element is the bit index in the GPEx_EN, in the 2891 * GPE blocks described in the FADT, of the enable bit that is 2892 * enabled for the wake event. 2893 */ 2894 prw->gpe_handle = NULL; 2895 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2896 error = 0; 2897 break; 2898 case ACPI_TYPE_PACKAGE: 2899 /* 2900 * If the data type of this package element is a package, then this 2901 * _PRW package element is itself a package containing two 2902 * elements. The first is an object reference to the GPE Block 2903 * device that contains the GPE that will be triggered by the wake 2904 * event. The second element is numeric and it contains the bit 2905 * index in the GPEx_EN, in the GPE Block referenced by the 2906 * first element in the package, of the enable bit that is enabled for 2907 * the wake event. 2908 * 2909 * For example, if this field is a package then it is of the form: 2910 * Package() {\_SB.PCI0.ISA.GPE, 2} 2911 */ 2912 res2 = &res->Package.Elements[0]; 2913 if (!ACPI_PKG_VALID(res2, 2)) 2914 goto out; 2915 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2916 if (prw->gpe_handle == NULL) 2917 goto out; 2918 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2919 goto out; 2920 error = 0; 2921 break; 2922 default: 2923 goto out; 2924 } 2925 2926 /* Elements 2 to N of the _PRW object are power resources. */ 2927 power_count = res->Package.Count - 2; 2928 if (power_count > ACPI_PRW_MAX_POWERRES) { 2929 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2930 power_count = 0; 2931 } 2932 prw->power_res_count = power_count; 2933 for (i = 0; i < power_count; i++) 2934 prw->power_res[i] = res->Package.Elements[i]; 2935 2936 out: 2937 if (prw_buffer.Pointer != NULL) 2938 AcpiOsFree(prw_buffer.Pointer); 2939 return (error); 2940 } 2941 2942 /* 2943 * ACPI Event Handlers 2944 */ 2945 2946 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2947 2948 static void 2949 acpi_system_eventhandler_sleep(void *arg, int state) 2950 { 2951 struct acpi_softc *sc = (struct acpi_softc *)arg; 2952 int ret; 2953 2954 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2955 2956 /* Check if button action is disabled or unknown. */ 2957 if (state == ACPI_STATE_UNKNOWN) 2958 return; 2959 2960 /* Request that the system prepare to enter the given suspend state. */ 2961 ret = acpi_ReqSleepState(sc, state); 2962 if (ret != 0) 2963 device_printf(sc->acpi_dev, 2964 "request to enter state S%d failed (err %d)\n", state, ret); 2965 2966 return_VOID; 2967 } 2968 2969 static void 2970 acpi_system_eventhandler_wakeup(void *arg, int state) 2971 { 2972 2973 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2974 2975 /* Currently, nothing to do for wakeup. */ 2976 2977 return_VOID; 2978 } 2979 2980 /* 2981 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2982 */ 2983 UINT32 2984 acpi_event_power_button_sleep(void *context) 2985 { 2986 struct acpi_softc *sc = (struct acpi_softc *)context; 2987 2988 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2989 2990 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2991 2992 return_VALUE (ACPI_INTERRUPT_HANDLED); 2993 } 2994 2995 UINT32 2996 acpi_event_power_button_wake(void *context) 2997 { 2998 struct acpi_softc *sc = (struct acpi_softc *)context; 2999 3000 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3001 3002 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 3003 3004 return_VALUE (ACPI_INTERRUPT_HANDLED); 3005 } 3006 3007 UINT32 3008 acpi_event_sleep_button_sleep(void *context) 3009 { 3010 struct acpi_softc *sc = (struct acpi_softc *)context; 3011 3012 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3013 3014 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3015 3016 return_VALUE (ACPI_INTERRUPT_HANDLED); 3017 } 3018 3019 UINT32 3020 acpi_event_sleep_button_wake(void *context) 3021 { 3022 struct acpi_softc *sc = (struct acpi_softc *)context; 3023 3024 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3025 3026 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3027 3028 return_VALUE (ACPI_INTERRUPT_HANDLED); 3029 } 3030 3031 /* 3032 * XXX This static buffer is suboptimal. There is no locking so only 3033 * use this for single-threaded callers. 3034 */ 3035 char * 3036 acpi_name(ACPI_HANDLE handle) 3037 { 3038 ACPI_BUFFER buf; 3039 static char data[256]; 3040 3041 buf.Length = sizeof(data); 3042 buf.Pointer = data; 3043 3044 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3045 return (data); 3046 return ("(unknown)"); 3047 } 3048 3049 /* 3050 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3051 * parts of the namespace. 3052 */ 3053 int 3054 acpi_avoid(ACPI_HANDLE handle) 3055 { 3056 char *cp, *env, *np; 3057 int len; 3058 3059 np = acpi_name(handle); 3060 if (*np == '\\') 3061 np++; 3062 if ((env = getenv("debug.acpi.avoid")) == NULL) 3063 return (0); 3064 3065 /* Scan the avoid list checking for a match */ 3066 cp = env; 3067 for (;;) { 3068 while (*cp != 0 && isspace(*cp)) 3069 cp++; 3070 if (*cp == 0) 3071 break; 3072 len = 0; 3073 while (cp[len] != 0 && !isspace(cp[len])) 3074 len++; 3075 if (!strncmp(cp, np, len)) { 3076 freeenv(env); 3077 return(1); 3078 } 3079 cp += len; 3080 } 3081 freeenv(env); 3082 3083 return (0); 3084 } 3085 3086 /* 3087 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3088 */ 3089 int 3090 acpi_disabled(char *subsys) 3091 { 3092 char *cp, *env; 3093 int len; 3094 3095 if ((env = getenv("debug.acpi.disabled")) == NULL) 3096 return (0); 3097 if (strcmp(env, "all") == 0) { 3098 freeenv(env); 3099 return (1); 3100 } 3101 3102 /* Scan the disable list, checking for a match. */ 3103 cp = env; 3104 for (;;) { 3105 while (*cp != '\0' && isspace(*cp)) 3106 cp++; 3107 if (*cp == '\0') 3108 break; 3109 len = 0; 3110 while (cp[len] != '\0' && !isspace(cp[len])) 3111 len++; 3112 if (strncmp(cp, subsys, len) == 0) { 3113 freeenv(env); 3114 return (1); 3115 } 3116 cp += len; 3117 } 3118 freeenv(env); 3119 3120 return (0); 3121 } 3122 3123 /* 3124 * Control interface. 3125 * 3126 * We multiplex ioctls for all participating ACPI devices here. Individual 3127 * drivers wanting to be accessible via /dev/acpi should use the 3128 * register/deregister interface to make their handlers visible. 3129 */ 3130 struct acpi_ioctl_hook 3131 { 3132 TAILQ_ENTRY(acpi_ioctl_hook) link; 3133 u_long cmd; 3134 acpi_ioctl_fn fn; 3135 void *arg; 3136 }; 3137 3138 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3139 static int acpi_ioctl_hooks_initted; 3140 3141 int 3142 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3143 { 3144 struct acpi_ioctl_hook *hp; 3145 3146 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3147 return (ENOMEM); 3148 hp->cmd = cmd; 3149 hp->fn = fn; 3150 hp->arg = arg; 3151 3152 ACPI_LOCK(acpi); 3153 if (acpi_ioctl_hooks_initted == 0) { 3154 TAILQ_INIT(&acpi_ioctl_hooks); 3155 acpi_ioctl_hooks_initted = 1; 3156 } 3157 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3158 ACPI_UNLOCK(acpi); 3159 3160 return (0); 3161 } 3162 3163 void 3164 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3165 { 3166 struct acpi_ioctl_hook *hp; 3167 3168 ACPI_LOCK(acpi); 3169 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3170 if (hp->cmd == cmd && hp->fn == fn) 3171 break; 3172 3173 if (hp != NULL) { 3174 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3175 free(hp, M_ACPIDEV); 3176 } 3177 ACPI_UNLOCK(acpi); 3178 } 3179 3180 static int 3181 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td) 3182 { 3183 return (0); 3184 } 3185 3186 static int 3187 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td) 3188 { 3189 return (0); 3190 } 3191 3192 static int 3193 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 3194 { 3195 struct acpi_softc *sc; 3196 struct acpi_ioctl_hook *hp; 3197 int error, state; 3198 3199 error = 0; 3200 hp = NULL; 3201 sc = dev->si_drv1; 3202 3203 /* 3204 * Scan the list of registered ioctls, looking for handlers. 3205 */ 3206 ACPI_LOCK(acpi); 3207 if (acpi_ioctl_hooks_initted) 3208 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3209 if (hp->cmd == cmd) 3210 break; 3211 } 3212 ACPI_UNLOCK(acpi); 3213 if (hp) 3214 return (hp->fn(cmd, addr, hp->arg)); 3215 3216 /* 3217 * Core ioctls are not permitted for non-writable user. 3218 * Currently, other ioctls just fetch information. 3219 * Not changing system behavior. 3220 */ 3221 if ((flag & FWRITE) == 0) 3222 return (EPERM); 3223 3224 /* Core system ioctls. */ 3225 switch (cmd) { 3226 case ACPIIO_REQSLPSTATE: 3227 state = *(int *)addr; 3228 if (state != ACPI_STATE_S5) 3229 return (acpi_ReqSleepState(sc, state)); 3230 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n"); 3231 error = EOPNOTSUPP; 3232 break; 3233 case ACPIIO_ACKSLPSTATE: 3234 error = *(int *)addr; 3235 error = acpi_AckSleepState(sc->acpi_clone, error); 3236 break; 3237 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3238 state = *(int *)addr; 3239 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX) 3240 return (EINVAL); 3241 if (!acpi_sleep_states[state]) 3242 return (EOPNOTSUPP); 3243 if (ACPI_FAILURE(acpi_SetSleepState(sc, state))) 3244 error = ENXIO; 3245 break; 3246 default: 3247 error = ENXIO; 3248 break; 3249 } 3250 3251 return (error); 3252 } 3253 3254 static int 3255 acpi_sname2sstate(const char *sname) 3256 { 3257 int sstate; 3258 3259 if (toupper(sname[0]) == 'S') { 3260 sstate = sname[1] - '0'; 3261 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 && 3262 sname[2] == '\0') 3263 return (sstate); 3264 } else if (strcasecmp(sname, "NONE") == 0) 3265 return (ACPI_STATE_UNKNOWN); 3266 return (-1); 3267 } 3268 3269 static const char * 3270 acpi_sstate2sname(int sstate) 3271 { 3272 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" }; 3273 3274 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5) 3275 return (snames[sstate]); 3276 else if (sstate == ACPI_STATE_UNKNOWN) 3277 return ("NONE"); 3278 return (NULL); 3279 } 3280 3281 static int 3282 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3283 { 3284 int error; 3285 struct sbuf sb; 3286 UINT8 state; 3287 3288 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3289 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++) 3290 if (acpi_sleep_states[state]) 3291 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state)); 3292 sbuf_trim(&sb); 3293 sbuf_finish(&sb); 3294 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3295 sbuf_delete(&sb); 3296 return (error); 3297 } 3298 3299 static int 3300 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3301 { 3302 char sleep_state[10]; 3303 int error, new_state, old_state; 3304 3305 old_state = *(int *)oidp->oid_arg1; 3306 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state)); 3307 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3308 if (error == 0 && req->newptr != NULL) { 3309 new_state = acpi_sname2sstate(sleep_state); 3310 if (new_state < ACPI_STATE_S1) 3311 return (EINVAL); 3312 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state]) 3313 return (EOPNOTSUPP); 3314 if (new_state != old_state) 3315 *(int *)oidp->oid_arg1 = new_state; 3316 } 3317 return (error); 3318 } 3319 3320 /* Inform devctl(4) when we receive a Notify. */ 3321 void 3322 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3323 { 3324 char notify_buf[16]; 3325 ACPI_BUFFER handle_buf; 3326 ACPI_STATUS status; 3327 3328 if (subsystem == NULL) 3329 return; 3330 3331 handle_buf.Pointer = NULL; 3332 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3333 status = AcpiNsHandleToPathname(h, &handle_buf); 3334 if (ACPI_FAILURE(status)) 3335 return; 3336 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3337 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3338 AcpiOsFree(handle_buf.Pointer); 3339 } 3340 3341 #ifdef ACPI_DEBUG 3342 /* 3343 * Support for parsing debug options from the kernel environment. 3344 * 3345 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3346 * by specifying the names of the bits in the debug.acpi.layer and 3347 * debug.acpi.level environment variables. Bits may be unset by 3348 * prefixing the bit name with !. 3349 */ 3350 struct debugtag 3351 { 3352 char *name; 3353 UINT32 value; 3354 }; 3355 3356 static struct debugtag dbg_layer[] = { 3357 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3358 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3359 {"ACPI_EVENTS", ACPI_EVENTS}, 3360 {"ACPI_TABLES", ACPI_TABLES}, 3361 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3362 {"ACPI_PARSER", ACPI_PARSER}, 3363 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3364 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3365 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3366 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3367 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3368 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3369 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3370 3371 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3372 {"ACPI_BATTERY", ACPI_BATTERY}, 3373 {"ACPI_BUS", ACPI_BUS}, 3374 {"ACPI_BUTTON", ACPI_BUTTON}, 3375 {"ACPI_EC", ACPI_EC}, 3376 {"ACPI_FAN", ACPI_FAN}, 3377 {"ACPI_POWERRES", ACPI_POWERRES}, 3378 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3379 {"ACPI_THERMAL", ACPI_THERMAL}, 3380 {"ACPI_TIMER", ACPI_TIMER}, 3381 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3382 {NULL, 0} 3383 }; 3384 3385 static struct debugtag dbg_level[] = { 3386 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3387 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3388 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3389 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3390 3391 /* Trace verbosity level 1 [Standard Trace Level] */ 3392 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3393 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3394 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3395 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3396 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3397 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3398 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3399 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3400 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3401 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3402 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3403 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3404 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3405 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3406 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3407 3408 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3409 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3410 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3411 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3412 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3413 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3414 3415 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3416 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3417 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3418 {"ACPI_LV_IO", ACPI_LV_IO}, 3419 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3420 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3421 3422 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3423 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3424 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3425 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3426 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3427 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3428 {NULL, 0} 3429 }; 3430 3431 static void 3432 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3433 { 3434 char *ep; 3435 int i, l; 3436 int set; 3437 3438 while (*cp) { 3439 if (isspace(*cp)) { 3440 cp++; 3441 continue; 3442 } 3443 ep = cp; 3444 while (*ep && !isspace(*ep)) 3445 ep++; 3446 if (*cp == '!') { 3447 set = 0; 3448 cp++; 3449 if (cp == ep) 3450 continue; 3451 } else { 3452 set = 1; 3453 } 3454 l = ep - cp; 3455 for (i = 0; tag[i].name != NULL; i++) { 3456 if (!strncmp(cp, tag[i].name, l)) { 3457 if (set) 3458 *flag |= tag[i].value; 3459 else 3460 *flag &= ~tag[i].value; 3461 } 3462 } 3463 cp = ep; 3464 } 3465 } 3466 3467 static void 3468 acpi_set_debugging(void *junk) 3469 { 3470 char *layer, *level; 3471 3472 if (cold) { 3473 AcpiDbgLayer = 0; 3474 AcpiDbgLevel = 0; 3475 } 3476 3477 layer = getenv("debug.acpi.layer"); 3478 level = getenv("debug.acpi.level"); 3479 if (layer == NULL && level == NULL) 3480 return; 3481 3482 printf("ACPI set debug"); 3483 if (layer != NULL) { 3484 if (strcmp("NONE", layer) != 0) 3485 printf(" layer '%s'", layer); 3486 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3487 freeenv(layer); 3488 } 3489 if (level != NULL) { 3490 if (strcmp("NONE", level) != 0) 3491 printf(" level '%s'", level); 3492 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3493 freeenv(level); 3494 } 3495 printf("\n"); 3496 } 3497 3498 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3499 NULL); 3500 3501 static int 3502 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3503 { 3504 int error, *dbg; 3505 struct debugtag *tag; 3506 struct sbuf sb; 3507 3508 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3509 return (ENOMEM); 3510 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3511 tag = &dbg_layer[0]; 3512 dbg = &AcpiDbgLayer; 3513 } else { 3514 tag = &dbg_level[0]; 3515 dbg = &AcpiDbgLevel; 3516 } 3517 3518 /* Get old values if this is a get request. */ 3519 ACPI_SERIAL_BEGIN(acpi); 3520 if (*dbg == 0) { 3521 sbuf_cpy(&sb, "NONE"); 3522 } else if (req->newptr == NULL) { 3523 for (; tag->name != NULL; tag++) { 3524 if ((*dbg & tag->value) == tag->value) 3525 sbuf_printf(&sb, "%s ", tag->name); 3526 } 3527 } 3528 sbuf_trim(&sb); 3529 sbuf_finish(&sb); 3530 3531 /* Copy out the old values to the user. */ 3532 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3533 sbuf_delete(&sb); 3534 3535 /* If the user is setting a string, parse it. */ 3536 if (error == 0 && req->newptr != NULL) { 3537 *dbg = 0; 3538 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3539 acpi_set_debugging(NULL); 3540 } 3541 ACPI_SERIAL_END(acpi); 3542 3543 return (error); 3544 } 3545 3546 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3547 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3548 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3549 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3550 #endif /* ACPI_DEBUG */ 3551 3552 static int 3553 acpi_pm_func(u_long cmd, void *arg, ...) 3554 { 3555 int state, acpi_state; 3556 int error; 3557 struct acpi_softc *sc; 3558 va_list ap; 3559 3560 error = 0; 3561 switch (cmd) { 3562 case POWER_CMD_SUSPEND: 3563 sc = (struct acpi_softc *)arg; 3564 if (sc == NULL) { 3565 error = EINVAL; 3566 goto out; 3567 } 3568 3569 va_start(ap, arg); 3570 state = va_arg(ap, int); 3571 va_end(ap); 3572 3573 switch (state) { 3574 case POWER_SLEEP_STATE_STANDBY: 3575 acpi_state = sc->acpi_standby_sx; 3576 break; 3577 case POWER_SLEEP_STATE_SUSPEND: 3578 acpi_state = sc->acpi_suspend_sx; 3579 break; 3580 case POWER_SLEEP_STATE_HIBERNATE: 3581 acpi_state = ACPI_STATE_S4; 3582 break; 3583 default: 3584 error = EINVAL; 3585 goto out; 3586 } 3587 3588 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3589 error = ENXIO; 3590 break; 3591 default: 3592 error = EINVAL; 3593 goto out; 3594 } 3595 3596 out: 3597 return (error); 3598 } 3599 3600 static void 3601 acpi_pm_register(void *arg) 3602 { 3603 if (!cold || resource_disabled("acpi", 0)) 3604 return; 3605 3606 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3607 } 3608 3609 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3610