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 #include <sys/smp.h> 50 51 #include <machine/clock.h> 52 #include <machine/resource.h> 53 #include <machine/bus.h> 54 #include <sys/rman.h> 55 #include <isa/isavar.h> 56 #include <isa/pnpvar.h> 57 58 #include <contrib/dev/acpica/acpi.h> 59 #include <dev/acpica/acpivar.h> 60 #include <dev/acpica/acpiio.h> 61 #include <contrib/dev/acpica/achware.h> 62 #include <contrib/dev/acpica/acnamesp.h> 63 64 #include "pci_if.h" 65 #include <dev/pci/pcivar.h> 66 #include <dev/pci/pci_private.h> 67 68 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 69 70 /* Hooks for the ACPI CA debugging infrastructure */ 71 #define _COMPONENT ACPI_BUS 72 ACPI_MODULE_NAME("ACPI") 73 74 static d_open_t acpiopen; 75 static d_close_t acpiclose; 76 static d_ioctl_t acpiioctl; 77 78 static struct cdevsw acpi_cdevsw = { 79 .d_version = D_VERSION, 80 .d_open = acpiopen, 81 .d_close = acpiclose, 82 .d_ioctl = acpiioctl, 83 .d_name = "acpi", 84 }; 85 86 /* Global mutex for locking access to the ACPI subsystem. */ 87 struct mtx acpi_mutex; 88 89 /* Bitmap of device quirks. */ 90 int acpi_quirks; 91 92 static int acpi_modevent(struct module *mod, int event, void *junk); 93 static void acpi_identify(driver_t *driver, device_t parent); 94 static int acpi_probe(device_t dev); 95 static int acpi_attach(device_t dev); 96 static int acpi_suspend(device_t dev); 97 static int acpi_resume(device_t dev); 98 static int acpi_shutdown(device_t dev); 99 static device_t acpi_add_child(device_t bus, int order, const char *name, 100 int unit); 101 static int acpi_print_child(device_t bus, device_t child); 102 static void acpi_probe_nomatch(device_t bus, device_t child); 103 static void acpi_driver_added(device_t dev, driver_t *driver); 104 static int acpi_read_ivar(device_t dev, device_t child, int index, 105 uintptr_t *result); 106 static int acpi_write_ivar(device_t dev, device_t child, int index, 107 uintptr_t value); 108 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 109 static int acpi_sysres_alloc(device_t dev); 110 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type, 111 u_long addr); 112 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 113 int type, int *rid, u_long start, u_long end, 114 u_long count, u_int flags); 115 static int acpi_release_resource(device_t bus, device_t child, int type, 116 int rid, struct resource *r); 117 static void acpi_delete_resource(device_t bus, device_t child, int type, 118 int rid); 119 static uint32_t acpi_isa_get_logicalid(device_t dev); 120 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 121 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 122 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 123 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 124 ACPI_BUFFER *ret); 125 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 126 int *dstate); 127 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 128 void *context, void **retval); 129 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 130 int max_depth, acpi_scan_cb_t user_fn, void *arg); 131 static int acpi_set_powerstate_method(device_t bus, device_t child, 132 int state); 133 static int acpi_isa_pnp_probe(device_t bus, device_t child, 134 struct isa_pnp_id *ids); 135 static void acpi_probe_children(device_t bus); 136 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 137 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 138 void *context, void **status); 139 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 140 static void acpi_shutdown_final(void *arg, int howto); 141 static void acpi_enable_fixed_events(struct acpi_softc *sc); 142 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 144 static int acpi_wake_prep_walk(int sstate); 145 static int acpi_wake_sysctl_walk(device_t dev); 146 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 147 static void acpi_system_eventhandler_sleep(void *arg, int state); 148 static void acpi_system_eventhandler_wakeup(void *arg, int state); 149 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 151 static int acpi_pm_func(u_long cmd, void *arg, ...); 152 static int acpi_child_location_str_method(device_t acdev, device_t child, 153 char *buf, size_t buflen); 154 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 155 char *buf, size_t buflen); 156 157 static device_method_t acpi_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_identify, acpi_identify), 160 DEVMETHOD(device_probe, acpi_probe), 161 DEVMETHOD(device_attach, acpi_attach), 162 DEVMETHOD(device_shutdown, acpi_shutdown), 163 DEVMETHOD(device_detach, bus_generic_detach), 164 DEVMETHOD(device_suspend, acpi_suspend), 165 DEVMETHOD(device_resume, acpi_resume), 166 167 /* Bus interface */ 168 DEVMETHOD(bus_add_child, acpi_add_child), 169 DEVMETHOD(bus_print_child, acpi_print_child), 170 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 171 DEVMETHOD(bus_driver_added, acpi_driver_added), 172 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 173 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 174 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 175 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 176 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 177 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 178 DEVMETHOD(bus_release_resource, acpi_release_resource), 179 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 180 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 181 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 182 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 183 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 184 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 185 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 186 187 /* ACPI bus */ 188 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 189 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 190 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 191 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 192 193 /* PCI emulation */ 194 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 195 196 /* ISA emulation */ 197 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 198 199 {0, 0} 200 }; 201 202 static driver_t acpi_driver = { 203 "acpi", 204 acpi_methods, 205 sizeof(struct acpi_softc), 206 }; 207 208 static devclass_t acpi_devclass; 209 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 210 MODULE_VERSION(acpi, 1); 211 212 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 213 214 /* Local pools for managing system resources for ACPI child devices. */ 215 static struct rman acpi_rman_io, acpi_rman_mem; 216 217 #define ACPI_MINIMUM_AWAKETIME 5 218 219 static const char* sleep_state_names[] = { 220 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 221 222 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging"); 223 static char acpi_ca_version[12]; 224 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 225 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 226 227 /* 228 * Allow override of whether methods execute in parallel or not. 229 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 230 * errors for AML that really can't handle parallel method execution. 231 * It is off by default since this breaks recursive methods and 232 * some IBMs use such code. 233 */ 234 static int acpi_serialize_methods; 235 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 236 237 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 238 static int acpi_do_powerstate = 1; 239 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 240 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 241 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 242 243 /* Allow users to override quirks. */ 244 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 245 246 /* 247 * ACPI can only be loaded as a module by the loader; activating it after 248 * system bootstrap time is not useful, and can be fatal to the system. 249 * It also cannot be unloaded, since the entire system bus heirarchy hangs 250 * off it. 251 */ 252 static int 253 acpi_modevent(struct module *mod, int event, void *junk) 254 { 255 switch (event) { 256 case MOD_LOAD: 257 if (!cold) { 258 printf("The ACPI driver cannot be loaded after boot.\n"); 259 return (EPERM); 260 } 261 break; 262 case MOD_UNLOAD: 263 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 264 return (EBUSY); 265 break; 266 default: 267 break; 268 } 269 return (0); 270 } 271 272 /* 273 * Perform early initialization. 274 */ 275 ACPI_STATUS 276 acpi_Startup(void) 277 { 278 static int started = 0; 279 int error, val; 280 281 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 282 283 /* Only run the startup code once. The MADT driver also calls this. */ 284 if (started) 285 return_VALUE (0); 286 started = 1; 287 288 /* Initialise the ACPI mutex */ 289 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 290 291 /* 292 * Set the globals from our tunables. This is needed because ACPI-CA 293 * uses UINT8 for some values and we have no tunable_byte. 294 */ 295 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 296 AcpiGbl_EnableInterpreterSlack = TRUE; 297 298 /* Start up the ACPI CA subsystem. */ 299 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 300 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 301 return_VALUE (error); 302 } 303 304 if (ACPI_FAILURE(error = AcpiLoadTables())) { 305 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 306 AcpiTerminate(); 307 return_VALUE (error); 308 } 309 310 /* Set up any quirks we have for this system. */ 311 if (acpi_quirks == 0) 312 acpi_table_quirks(&acpi_quirks); 313 314 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 315 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 316 acpi_quirks &= ~ACPI_Q_BROKEN; 317 if (acpi_quirks & ACPI_Q_BROKEN) { 318 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 319 AcpiTerminate(); 320 return_VALUE (AE_ERROR); 321 } 322 323 return_VALUE (AE_OK); 324 } 325 326 /* 327 * Detect ACPI, perform early initialisation 328 */ 329 static void 330 acpi_identify(driver_t *driver, device_t parent) 331 { 332 device_t child; 333 334 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 335 336 if (!cold) 337 return_VOID; 338 339 /* Check that we haven't been disabled with a hint. */ 340 if (resource_disabled("acpi", 0)) 341 return_VOID; 342 343 /* Make sure we're not being doubly invoked. */ 344 if (device_find_child(parent, "acpi", 0) != NULL) 345 return_VOID; 346 347 /* Initialize ACPI-CA. */ 348 if (ACPI_FAILURE(acpi_Startup())) 349 return_VOID; 350 351 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 352 353 /* Attach the actual ACPI device. */ 354 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 355 device_printf(parent, "device_identify failed\n"); 356 return_VOID; 357 } 358 } 359 360 /* 361 * Fetch some descriptive data from ACPI to put in our attach message. 362 */ 363 static int 364 acpi_probe(device_t dev) 365 { 366 ACPI_TABLE_HEADER th; 367 char buf[20]; 368 int error; 369 struct sbuf sb; 370 ACPI_STATUS status; 371 372 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 373 374 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 375 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 376 device_printf(dev, "probe failed, other PM system enabled.\n"); 377 return_VALUE (ENXIO); 378 } 379 380 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 381 device_printf(dev, "couldn't get XSDT header: %s\n", 382 AcpiFormatException(status)); 383 error = ENXIO; 384 } else { 385 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 386 sbuf_bcat(&sb, th.OemId, 6); 387 sbuf_trim(&sb); 388 sbuf_putc(&sb, ' '); 389 sbuf_bcat(&sb, th.OemTableId, 8); 390 sbuf_trim(&sb); 391 sbuf_finish(&sb); 392 device_set_desc_copy(dev, sbuf_data(&sb)); 393 sbuf_delete(&sb); 394 error = 0; 395 } 396 397 return_VALUE (error); 398 } 399 400 static int 401 acpi_attach(device_t dev) 402 { 403 struct acpi_softc *sc; 404 ACPI_STATUS status; 405 int error, state; 406 UINT32 flags; 407 UINT8 TypeA, TypeB; 408 char *env; 409 410 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 411 412 sc = device_get_softc(dev); 413 sc->acpi_dev = dev; 414 415 /* Initialize resource manager. */ 416 acpi_rman_io.rm_type = RMAN_ARRAY; 417 acpi_rman_io.rm_start = 0; 418 acpi_rman_io.rm_end = 0xffff; 419 acpi_rman_io.rm_descr = "I/O ports"; 420 if (rman_init(&acpi_rman_io) != 0) 421 panic("acpi rman_init IO ports failed"); 422 acpi_rman_mem.rm_type = RMAN_ARRAY; 423 acpi_rman_mem.rm_start = 0; 424 acpi_rman_mem.rm_end = ~0ul; 425 acpi_rman_mem.rm_descr = "I/O memory addresses"; 426 if (rman_init(&acpi_rman_mem) != 0) 427 panic("acpi rman_init memory failed"); 428 429 /* Install the default address space handlers. */ 430 error = ENXIO; 431 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 432 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 433 if (ACPI_FAILURE(status)) { 434 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 435 AcpiFormatException(status)); 436 goto out; 437 } 438 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 439 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 440 if (ACPI_FAILURE(status)) { 441 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 442 AcpiFormatException(status)); 443 goto out; 444 } 445 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 446 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 447 if (ACPI_FAILURE(status)) { 448 device_printf(dev, "could not initialise PciConfig handler: %s\n", 449 AcpiFormatException(status)); 450 goto out; 451 } 452 453 /* 454 * Note that some systems (specifically, those with namespace evaluation 455 * issues that require the avoidance of parts of the namespace) must 456 * avoid running _INI and _STA on everything, as well as dodging the final 457 * object init pass. 458 * 459 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 460 * 461 * XXX We should arrange for the object init pass after we have attached 462 * all our child devices, but on many systems it works here. 463 */ 464 flags = 0; 465 if (testenv("debug.acpi.avoid")) 466 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 467 468 /* Bring the hardware and basic handlers online. */ 469 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 470 device_printf(dev, "Could not enable ACPI: %s\n", 471 AcpiFormatException(status)); 472 goto out; 473 } 474 475 /* 476 * Call the ECDT probe function to provide EC functionality before 477 * the namespace has been evaluated. 478 * 479 * XXX This happens before the sysresource devices have been probed and 480 * attached so its resources come from nexus0. In practice, this isn't 481 * a problem but should be addressed eventually. 482 */ 483 acpi_ec_ecdt_probe(dev); 484 485 /* Bring device objects and regions online. */ 486 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 487 device_printf(dev, "Could not initialize ACPI objects: %s\n", 488 AcpiFormatException(status)); 489 goto out; 490 } 491 492 /* 493 * Setup our sysctl tree. 494 * 495 * XXX: This doesn't check to make sure that none of these fail. 496 */ 497 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 498 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 499 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 500 device_get_name(dev), CTLFLAG_RD, 0, ""); 501 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 502 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 503 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 504 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 505 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 506 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 507 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 508 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 509 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 510 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 511 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 512 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 513 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 514 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 515 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 516 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 517 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 518 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 519 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 520 OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW, 521 &sc->acpi_sleep_delay, 0, "sleep delay"); 522 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 523 OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW, 524 &sc->acpi_s4bios, 0, "S4BIOS mode"); 525 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 526 OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW, 527 &sc->acpi_verbose, 0, "verbose mode"); 528 529 /* 530 * Default to 1 second before sleeping to give some machines time to 531 * stabilize. 532 */ 533 sc->acpi_sleep_delay = 1; 534 if (bootverbose) 535 sc->acpi_verbose = 1; 536 if ((env = getenv("hw.acpi.verbose")) != NULL) { 537 if (strcmp(env, "0") != 0) 538 sc->acpi_verbose = 1; 539 freeenv(env); 540 } 541 542 /* Only enable S4BIOS by default if the FACS says it is available. */ 543 if (AcpiGbl_FACS->S4Bios_f != 0) 544 sc->acpi_s4bios = 1; 545 546 /* 547 * Dispatch the default sleep state to devices. The lid switch is set 548 * to NONE by default to avoid surprising users. 549 */ 550 sc->acpi_power_button_sx = ACPI_STATE_S5; 551 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 552 sc->acpi_standby_sx = ACPI_STATE_S1; 553 sc->acpi_suspend_sx = ACPI_STATE_S3; 554 555 /* Pick the first valid sleep state for the sleep button default. */ 556 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 557 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 558 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 559 sc->acpi_sleep_button_sx = state; 560 break; 561 } 562 563 acpi_enable_fixed_events(sc); 564 565 /* 566 * Scan the namespace and attach/initialise children. 567 */ 568 569 /* Register our shutdown handler. */ 570 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 571 SHUTDOWN_PRI_LAST); 572 573 /* 574 * Register our acpi event handlers. 575 * XXX should be configurable eg. via userland policy manager. 576 */ 577 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 578 sc, ACPI_EVENT_PRI_LAST); 579 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 580 sc, ACPI_EVENT_PRI_LAST); 581 582 /* Flag our initial states. */ 583 sc->acpi_enabled = 1; 584 sc->acpi_sstate = ACPI_STATE_S0; 585 sc->acpi_sleep_disabled = 0; 586 587 /* Create the control device */ 588 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 589 "acpi"); 590 sc->acpi_dev_t->si_drv1 = sc; 591 592 if ((error = acpi_machdep_init(dev))) 593 goto out; 594 595 /* Register ACPI again to pass the correct argument of pm_func. */ 596 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 597 598 if (!acpi_disabled("bus")) 599 acpi_probe_children(dev); 600 601 error = 0; 602 603 out: 604 return_VALUE (error); 605 } 606 607 static int 608 acpi_suspend(device_t dev) 609 { 610 device_t child, *devlist; 611 int error, i, numdevs, pstate; 612 613 GIANT_REQUIRED; 614 615 /* First give child devices a chance to suspend. */ 616 error = bus_generic_suspend(dev); 617 if (error) 618 return (error); 619 620 /* 621 * Now, set them into the appropriate power state, usually D3. If the 622 * device has an _SxD method for the next sleep state, use that power 623 * state instead. 624 */ 625 device_get_children(dev, &devlist, &numdevs); 626 for (i = 0; i < numdevs; i++) { 627 /* If the device is not attached, we've powered it down elsewhere. */ 628 child = devlist[i]; 629 if (!device_is_attached(child)) 630 continue; 631 632 /* 633 * Default to D3 for all sleep states. The _SxD method is optional 634 * so set the powerstate even if it's absent. 635 */ 636 pstate = PCI_POWERSTATE_D3; 637 error = acpi_device_pwr_for_sleep(device_get_parent(child), 638 child, &pstate); 639 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 640 pci_set_powerstate(child, pstate); 641 } 642 free(devlist, M_TEMP); 643 error = 0; 644 645 return (error); 646 } 647 648 static int 649 acpi_resume(device_t dev) 650 { 651 ACPI_HANDLE handle; 652 int i, numdevs; 653 device_t child, *devlist; 654 655 GIANT_REQUIRED; 656 657 /* 658 * Put all devices in D0 before resuming them. Call _S0D on each one 659 * since some systems expect this. 660 */ 661 device_get_children(dev, &devlist, &numdevs); 662 for (i = 0; i < numdevs; i++) { 663 child = devlist[i]; 664 handle = acpi_get_handle(child); 665 if (handle) 666 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 667 if (device_is_attached(child) && acpi_do_powerstate) 668 pci_set_powerstate(child, PCI_POWERSTATE_D0); 669 } 670 free(devlist, M_TEMP); 671 672 return (bus_generic_resume(dev)); 673 } 674 675 static int 676 acpi_shutdown(device_t dev) 677 { 678 679 GIANT_REQUIRED; 680 681 /* Allow children to shutdown first. */ 682 bus_generic_shutdown(dev); 683 684 /* 685 * Enable any GPEs that are able to power-on the system (i.e., RTC). 686 * Also, disable any that are not valid for this state (most). 687 */ 688 acpi_wake_prep_walk(ACPI_STATE_S5); 689 690 return (0); 691 } 692 693 /* 694 * Handle a new device being added 695 */ 696 static device_t 697 acpi_add_child(device_t bus, int order, const char *name, int unit) 698 { 699 struct acpi_device *ad; 700 device_t child; 701 702 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 703 return (NULL); 704 705 resource_list_init(&ad->ad_rl); 706 707 child = device_add_child_ordered(bus, order, name, unit); 708 if (child != NULL) 709 device_set_ivars(child, ad); 710 else 711 free(ad, M_ACPIDEV); 712 return (child); 713 } 714 715 static int 716 acpi_print_child(device_t bus, device_t child) 717 { 718 struct acpi_device *adev = device_get_ivars(child); 719 struct resource_list *rl = &adev->ad_rl; 720 int retval = 0; 721 722 retval += bus_print_child_header(bus, child); 723 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 724 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 725 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 726 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 727 if (device_get_flags(child)) 728 retval += printf(" flags %#x", device_get_flags(child)); 729 retval += bus_print_child_footer(bus, child); 730 731 return (retval); 732 } 733 734 /* 735 * If this device is an ACPI child but no one claimed it, attempt 736 * to power it off. We'll power it back up when a driver is added. 737 * 738 * XXX Disabled for now since many necessary devices (like fdc and 739 * ATA) don't claim the devices we created for them but still expect 740 * them to be powered up. 741 */ 742 static void 743 acpi_probe_nomatch(device_t bus, device_t child) 744 { 745 746 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 747 } 748 749 /* 750 * If a new driver has a chance to probe a child, first power it up. 751 * 752 * XXX Disabled for now (see acpi_probe_nomatch for details). 753 */ 754 static void 755 acpi_driver_added(device_t dev, driver_t *driver) 756 { 757 device_t child, *devlist; 758 int i, numdevs; 759 760 DEVICE_IDENTIFY(driver, dev); 761 device_get_children(dev, &devlist, &numdevs); 762 for (i = 0; i < numdevs; i++) { 763 child = devlist[i]; 764 if (device_get_state(child) == DS_NOTPRESENT) { 765 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 766 if (device_probe_and_attach(child) != 0) 767 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 768 } 769 } 770 free(devlist, M_TEMP); 771 } 772 773 /* Location hint for devctl(8) */ 774 static int 775 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 776 size_t buflen) 777 { 778 struct acpi_device *dinfo = device_get_ivars(child); 779 780 if (dinfo->ad_handle) 781 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 782 else 783 snprintf(buf, buflen, "unknown"); 784 return (0); 785 } 786 787 /* PnP information for devctl(8) */ 788 static int 789 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 790 size_t buflen) 791 { 792 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 793 ACPI_DEVICE_INFO *adinfo; 794 struct acpi_device *dinfo = device_get_ivars(child); 795 char *end; 796 int error; 797 798 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 799 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 800 if (error) 801 snprintf(buf, buflen, "unknown"); 802 else 803 snprintf(buf, buflen, "_HID=%s _UID=%lu", 804 (adinfo->Valid & ACPI_VALID_HID) ? 805 adinfo->HardwareId.Value : "none", 806 (adinfo->Valid & ACPI_VALID_UID) ? 807 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 808 if (adinfo) 809 AcpiOsFree(adinfo); 810 811 return (0); 812 } 813 814 /* 815 * Handle per-device ivars 816 */ 817 static int 818 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 819 { 820 struct acpi_device *ad; 821 822 if ((ad = device_get_ivars(child)) == NULL) { 823 printf("device has no ivars\n"); 824 return (ENOENT); 825 } 826 827 /* ACPI and ISA compatibility ivars */ 828 switch(index) { 829 case ACPI_IVAR_HANDLE: 830 *(ACPI_HANDLE *)result = ad->ad_handle; 831 break; 832 case ACPI_IVAR_MAGIC: 833 *(int *)result = ad->ad_magic; 834 break; 835 case ACPI_IVAR_PRIVATE: 836 *(void **)result = ad->ad_private; 837 break; 838 case ACPI_IVAR_FLAGS: 839 *(int *)result = ad->ad_flags; 840 break; 841 case ISA_IVAR_VENDORID: 842 case ISA_IVAR_SERIAL: 843 case ISA_IVAR_COMPATID: 844 *(int *)result = -1; 845 break; 846 case ISA_IVAR_LOGICALID: 847 *(int *)result = acpi_isa_get_logicalid(child); 848 break; 849 default: 850 return (ENOENT); 851 } 852 853 return (0); 854 } 855 856 static int 857 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 858 { 859 struct acpi_device *ad; 860 861 if ((ad = device_get_ivars(child)) == NULL) { 862 printf("device has no ivars\n"); 863 return (ENOENT); 864 } 865 866 switch(index) { 867 case ACPI_IVAR_HANDLE: 868 ad->ad_handle = (ACPI_HANDLE)value; 869 break; 870 case ACPI_IVAR_MAGIC: 871 ad->ad_magic = (int)value; 872 break; 873 case ACPI_IVAR_PRIVATE: 874 ad->ad_private = (void *)value; 875 break; 876 case ACPI_IVAR_FLAGS: 877 ad->ad_flags = (int)value; 878 break; 879 default: 880 panic("bad ivar write request (%d)", index); 881 return (ENOENT); 882 } 883 884 return (0); 885 } 886 887 /* 888 * Handle child resource allocation/removal 889 */ 890 static struct resource_list * 891 acpi_get_rlist(device_t dev, device_t child) 892 { 893 struct acpi_device *ad; 894 895 ad = device_get_ivars(child); 896 return (&ad->ad_rl); 897 } 898 899 /* 900 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 901 * duplicates, we merge any in the sysresource attach routine. 902 */ 903 static int 904 acpi_sysres_alloc(device_t dev) 905 { 906 struct resource *res; 907 struct resource_list *rl; 908 struct resource_list_entry *rle; 909 struct rman *rm; 910 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 911 device_t *children; 912 int child_count, i; 913 914 /* 915 * Probe/attach any sysresource devices. This would be unnecessary if we 916 * had multi-pass probe/attach. 917 */ 918 if (device_get_children(dev, &children, &child_count) != 0) 919 return (ENXIO); 920 for (i = 0; i < child_count; i++) { 921 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 922 device_probe_and_attach(children[i]); 923 } 924 free(children, M_TEMP); 925 926 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 927 STAILQ_FOREACH(rle, rl, link) { 928 if (rle->res != NULL) { 929 device_printf(dev, "duplicate resource for %lx\n", rle->start); 930 continue; 931 } 932 933 /* Only memory and IO resources are valid here. */ 934 switch (rle->type) { 935 case SYS_RES_IOPORT: 936 rm = &acpi_rman_io; 937 break; 938 case SYS_RES_MEMORY: 939 rm = &acpi_rman_mem; 940 break; 941 default: 942 continue; 943 } 944 945 /* Pre-allocate resource and add to our rman pool. */ 946 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 947 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 948 if (res != NULL) { 949 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 950 rle->res = res; 951 } else 952 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 953 rle->start, rle->count, rle->type); 954 } 955 return (0); 956 } 957 958 /* Find if we manage a given resource. */ 959 static struct resource_list_entry * 960 acpi_sysres_find(device_t dev, int type, u_long addr) 961 { 962 struct resource_list *rl; 963 struct resource_list_entry *rle; 964 965 ACPI_SERIAL_ASSERT(acpi); 966 967 /* We only consider IO and memory resources for our pool. */ 968 rle = NULL; 969 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 970 goto out; 971 972 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 973 STAILQ_FOREACH(rle, rl, link) { 974 if (type == rle->type && addr >= rle->start && 975 addr < rle->start + rle->count) 976 break; 977 } 978 979 out: 980 return (rle); 981 } 982 983 static struct resource * 984 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 985 u_long start, u_long end, u_long count, u_int flags) 986 { 987 ACPI_RESOURCE ares; 988 struct acpi_device *ad = device_get_ivars(child); 989 struct resource_list *rl = &ad->ad_rl; 990 struct resource_list_entry *rle; 991 struct resource *res; 992 struct rman *rm; 993 994 res = NULL; 995 ACPI_SERIAL_BEGIN(acpi); 996 997 /* 998 * If this is an allocation of the "default" range for a given RID, and 999 * we know what the resources for this device are (i.e., they're on the 1000 * child's resource list), use those start/end values. 1001 */ 1002 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1003 rle = resource_list_find(rl, type, *rid); 1004 if (rle == NULL) 1005 goto out; 1006 start = rle->start; 1007 end = rle->end; 1008 count = rle->count; 1009 } 1010 1011 /* If we don't manage this address, pass the request up to the parent. */ 1012 rle = acpi_sysres_find(bus, type, start); 1013 if (rle == NULL) { 1014 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1015 start, end, count, flags); 1016 } else { 1017 1018 /* We only handle memory and IO resources through rman. */ 1019 switch (type) { 1020 case SYS_RES_IOPORT: 1021 rm = &acpi_rman_io; 1022 break; 1023 case SYS_RES_MEMORY: 1024 rm = &acpi_rman_mem; 1025 break; 1026 default: 1027 panic("acpi_alloc_resource: invalid res type %d", type); 1028 } 1029 1030 /* If we do know it, allocate it from the local pool. */ 1031 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1032 child); 1033 if (res == NULL) 1034 goto out; 1035 1036 /* Copy the bus tag and handle from the pre-allocated resource. */ 1037 rman_set_rid(res, *rid); 1038 rman_set_bustag(res, rman_get_bustag(rle->res)); 1039 rman_set_bushandle(res, rman_get_start(res)); 1040 1041 /* If requested, activate the resource using the parent's method. */ 1042 if (flags & RF_ACTIVE) 1043 if (bus_activate_resource(child, type, *rid, res) != 0) { 1044 rman_release_resource(res); 1045 res = NULL; 1046 goto out; 1047 } 1048 } 1049 1050 if (res != NULL && device_get_parent(child) == bus) 1051 switch (type) { 1052 case SYS_RES_IRQ: 1053 /* 1054 * Since bus_config_intr() takes immediate effect, we cannot 1055 * configure the interrupt associated with a device when we 1056 * parse the resources but have to defer it until a driver 1057 * actually allocates the interrupt via bus_alloc_resource(). 1058 * 1059 * XXX: Should we handle the lookup failing? 1060 */ 1061 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1062 acpi_config_intr(child, &ares); 1063 break; 1064 } 1065 1066 out: 1067 ACPI_SERIAL_END(acpi); 1068 return (res); 1069 } 1070 1071 static int 1072 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1073 struct resource *r) 1074 { 1075 int ret; 1076 1077 ACPI_SERIAL_BEGIN(acpi); 1078 1079 /* 1080 * If we know about this address, deactivate it and release it to the 1081 * local pool. If we don't, pass this request up to the parent. 1082 */ 1083 if (acpi_sysres_find(bus, type, rman_get_start(r)) == NULL) { 1084 if (rman_get_flags(r) & RF_ACTIVE) { 1085 ret = bus_deactivate_resource(child, type, rid, r); 1086 if (ret != 0) 1087 goto out; 1088 } 1089 ret = rman_release_resource(r); 1090 } else 1091 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1092 1093 out: 1094 ACPI_SERIAL_END(acpi); 1095 return (ret); 1096 } 1097 1098 static void 1099 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1100 { 1101 struct resource_list *rl; 1102 1103 rl = acpi_get_rlist(bus, child); 1104 resource_list_delete(rl, type, rid); 1105 } 1106 1107 /* Allocate an IO port or memory resource, given its GAS. */ 1108 int 1109 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1110 struct resource **res) 1111 { 1112 int error, res_type; 1113 1114 error = ENOMEM; 1115 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1116 return (EINVAL); 1117 1118 /* We only support memory and IO spaces. */ 1119 switch (gas->AddressSpaceId) { 1120 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1121 res_type = SYS_RES_MEMORY; 1122 break; 1123 case ACPI_ADR_SPACE_SYSTEM_IO: 1124 res_type = SYS_RES_IOPORT; 1125 break; 1126 default: 1127 return (EOPNOTSUPP); 1128 } 1129 1130 /* 1131 * If the register width is less than 8, assume the BIOS author means 1132 * it is a bit field and just allocate a byte. 1133 */ 1134 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8) 1135 gas->RegisterBitWidth = 8; 1136 1137 /* Validate the address after we're sure we support the space. */ 1138 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0) 1139 return (EINVAL); 1140 1141 bus_set_resource(dev, res_type, *rid, gas->Address, 1142 gas->RegisterBitWidth / 8); 1143 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE); 1144 if (*res != NULL) { 1145 *type = res_type; 1146 error = 0; 1147 } else 1148 bus_delete_resource(dev, res_type, *rid); 1149 1150 return (error); 1151 } 1152 1153 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1154 static uint32_t 1155 acpi_isa_get_logicalid(device_t dev) 1156 { 1157 ACPI_DEVICE_INFO *devinfo; 1158 ACPI_BUFFER buf; 1159 ACPI_HANDLE h; 1160 ACPI_STATUS error; 1161 u_int32_t pnpid; 1162 1163 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1164 1165 pnpid = 0; 1166 buf.Pointer = NULL; 1167 buf.Length = ACPI_ALLOCATE_BUFFER; 1168 1169 /* Fetch and validate the HID. */ 1170 if ((h = acpi_get_handle(dev)) == NULL) 1171 goto out; 1172 error = AcpiGetObjectInfo(h, &buf); 1173 if (ACPI_FAILURE(error)) 1174 goto out; 1175 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1176 1177 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1178 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1179 1180 out: 1181 if (buf.Pointer != NULL) 1182 AcpiOsFree(buf.Pointer); 1183 return_VALUE (pnpid); 1184 } 1185 1186 static int 1187 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1188 { 1189 ACPI_DEVICE_INFO *devinfo; 1190 ACPI_BUFFER buf; 1191 ACPI_HANDLE h; 1192 ACPI_STATUS error; 1193 uint32_t *pnpid; 1194 int valid, i; 1195 1196 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1197 1198 pnpid = cids; 1199 valid = 0; 1200 buf.Pointer = NULL; 1201 buf.Length = ACPI_ALLOCATE_BUFFER; 1202 1203 /* Fetch and validate the CID */ 1204 if ((h = acpi_get_handle(dev)) == NULL) 1205 goto out; 1206 error = AcpiGetObjectInfo(h, &buf); 1207 if (ACPI_FAILURE(error)) 1208 goto out; 1209 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1210 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1211 goto out; 1212 1213 if (devinfo->CompatibilityId.Count < count) 1214 count = devinfo->CompatibilityId.Count; 1215 for (i = 0; i < count; i++) { 1216 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1217 continue; 1218 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1219 valid++; 1220 } 1221 1222 out: 1223 if (buf.Pointer != NULL) 1224 AcpiOsFree(buf.Pointer); 1225 return_VALUE (valid); 1226 } 1227 1228 static char * 1229 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1230 { 1231 ACPI_HANDLE h; 1232 int i; 1233 1234 h = acpi_get_handle(dev); 1235 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1236 return (NULL); 1237 1238 /* Try to match one of the array of IDs with a HID or CID. */ 1239 for (i = 0; ids[i] != NULL; i++) { 1240 if (acpi_MatchHid(h, ids[i])) 1241 return (ids[i]); 1242 } 1243 return (NULL); 1244 } 1245 1246 static ACPI_STATUS 1247 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1248 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1249 { 1250 ACPI_HANDLE h; 1251 1252 if (dev == NULL) 1253 h = ACPI_ROOT_OBJECT; 1254 else if ((h = acpi_get_handle(dev)) == NULL) 1255 return (AE_BAD_PARAMETER); 1256 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1257 } 1258 1259 static int 1260 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1261 { 1262 struct acpi_softc *sc; 1263 ACPI_HANDLE handle; 1264 ACPI_STATUS status; 1265 char sxd[8]; 1266 int error; 1267 1268 sc = device_get_softc(bus); 1269 handle = acpi_get_handle(dev); 1270 1271 /* 1272 * XXX If we find these devices, don't try to power them down. 1273 * The serial and IRDA ports on my T23 hang the system when 1274 * set to D3 and it appears that such legacy devices may 1275 * need special handling in their drivers. 1276 */ 1277 if (handle == NULL || 1278 acpi_MatchHid(handle, "PNP0500") || 1279 acpi_MatchHid(handle, "PNP0501") || 1280 acpi_MatchHid(handle, "PNP0502") || 1281 acpi_MatchHid(handle, "PNP0510") || 1282 acpi_MatchHid(handle, "PNP0511")) 1283 return (ENXIO); 1284 1285 /* 1286 * Override next state with the value from _SxD, if present. If no 1287 * dstate argument was provided, don't fetch the return value. 1288 */ 1289 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1290 if (dstate) 1291 status = acpi_GetInteger(handle, sxd, dstate); 1292 else 1293 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1294 1295 switch (status) { 1296 case AE_OK: 1297 error = 0; 1298 break; 1299 case AE_NOT_FOUND: 1300 error = ESRCH; 1301 break; 1302 default: 1303 error = ENXIO; 1304 break; 1305 } 1306 1307 return (error); 1308 } 1309 1310 /* Callback arg for our implementation of walking the namespace. */ 1311 struct acpi_device_scan_ctx { 1312 acpi_scan_cb_t user_fn; 1313 void *arg; 1314 ACPI_HANDLE parent; 1315 }; 1316 1317 static ACPI_STATUS 1318 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1319 { 1320 struct acpi_device_scan_ctx *ctx; 1321 device_t dev, old_dev; 1322 ACPI_STATUS status; 1323 ACPI_OBJECT_TYPE type; 1324 1325 /* 1326 * Skip this device if we think we'll have trouble with it or it is 1327 * the parent where the scan began. 1328 */ 1329 ctx = (struct acpi_device_scan_ctx *)arg; 1330 if (acpi_avoid(h) || h == ctx->parent) 1331 return (AE_OK); 1332 1333 /* If this is not a valid device type (e.g., a method), skip it. */ 1334 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1335 return (AE_OK); 1336 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1337 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1338 return (AE_OK); 1339 1340 /* 1341 * Call the user function with the current device. If it is unchanged 1342 * afterwards, return. Otherwise, we update the handle to the new dev. 1343 */ 1344 old_dev = acpi_get_device(h); 1345 dev = old_dev; 1346 status = ctx->user_fn(h, &dev, level, ctx->arg); 1347 if (ACPI_FAILURE(status) || old_dev == dev) 1348 return (status); 1349 1350 /* Remove the old child and its connection to the handle. */ 1351 if (old_dev != NULL) { 1352 device_delete_child(device_get_parent(old_dev), old_dev); 1353 AcpiDetachData(h, acpi_fake_objhandler); 1354 } 1355 1356 /* Recreate the handle association if the user created a device. */ 1357 if (dev != NULL) 1358 AcpiAttachData(h, acpi_fake_objhandler, dev); 1359 1360 return (AE_OK); 1361 } 1362 1363 static ACPI_STATUS 1364 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1365 acpi_scan_cb_t user_fn, void *arg) 1366 { 1367 ACPI_HANDLE h; 1368 struct acpi_device_scan_ctx ctx; 1369 1370 if (acpi_disabled("children")) 1371 return (AE_OK); 1372 1373 if (dev == NULL) 1374 h = ACPI_ROOT_OBJECT; 1375 else if ((h = acpi_get_handle(dev)) == NULL) 1376 return (AE_BAD_PARAMETER); 1377 ctx.user_fn = user_fn; 1378 ctx.arg = arg; 1379 ctx.parent = h; 1380 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1381 acpi_device_scan_cb, &ctx, NULL)); 1382 } 1383 1384 /* 1385 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1386 * device power states since it's close enough to ACPI. 1387 */ 1388 static int 1389 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1390 { 1391 ACPI_HANDLE h; 1392 ACPI_STATUS status; 1393 int error; 1394 1395 error = 0; 1396 h = acpi_get_handle(child); 1397 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1398 return (EINVAL); 1399 if (h == NULL) 1400 return (0); 1401 1402 /* Ignore errors if the power methods aren't present. */ 1403 status = acpi_pwr_switch_consumer(h, state); 1404 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1405 && status != AE_BAD_PARAMETER) 1406 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1407 state, acpi_name(h), AcpiFormatException(status)); 1408 1409 return (error); 1410 } 1411 1412 static int 1413 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1414 { 1415 int result, cid_count, i; 1416 uint32_t lid, cids[8]; 1417 1418 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1419 1420 /* 1421 * ISA-style drivers attached to ACPI may persist and 1422 * probe manually if we return ENOENT. We never want 1423 * that to happen, so don't ever return it. 1424 */ 1425 result = ENXIO; 1426 1427 /* Scan the supplied IDs for a match */ 1428 lid = acpi_isa_get_logicalid(child); 1429 cid_count = acpi_isa_get_compatid(child, cids, 8); 1430 while (ids && ids->ip_id) { 1431 if (lid == ids->ip_id) { 1432 result = 0; 1433 goto out; 1434 } 1435 for (i = 0; i < cid_count; i++) { 1436 if (cids[i] == ids->ip_id) { 1437 result = 0; 1438 goto out; 1439 } 1440 } 1441 ids++; 1442 } 1443 1444 out: 1445 if (result == 0 && ids->ip_desc) 1446 device_set_desc(child, ids->ip_desc); 1447 1448 return_VALUE (result); 1449 } 1450 1451 /* 1452 * Scan all of the ACPI namespace and attach child devices. 1453 * 1454 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1455 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1456 * However, in violation of the spec, some systems place their PCI link 1457 * devices in \, so we have to walk the whole namespace. We check the 1458 * type of namespace nodes, so this should be ok. 1459 */ 1460 static void 1461 acpi_probe_children(device_t bus) 1462 { 1463 1464 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1465 1466 /* 1467 * Scan the namespace and insert placeholders for all the devices that 1468 * we find. We also probe/attach any early devices. 1469 * 1470 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1471 * we want to create nodes for all devices, not just those that are 1472 * currently present. (This assumes that we don't want to create/remove 1473 * devices as they appear, which might be smarter.) 1474 */ 1475 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1476 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1477 bus, NULL); 1478 1479 /* Pre-allocate resources for our rman from any sysresource devices. */ 1480 acpi_sysres_alloc(bus); 1481 1482 /* Create any static children by calling device identify methods. */ 1483 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1484 bus_generic_probe(bus); 1485 1486 /* Probe/attach all children, created staticly and from the namespace. */ 1487 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1488 bus_generic_attach(bus); 1489 1490 /* 1491 * Some of these children may have attached others as part of their attach 1492 * process (eg. the root PCI bus driver), so rescan. 1493 */ 1494 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1495 bus_generic_attach(bus); 1496 1497 /* Attach wake sysctls. */ 1498 acpi_wake_sysctl_walk(bus); 1499 1500 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1501 return_VOID; 1502 } 1503 1504 /* 1505 * Determine the probe order for a given device and return non-zero if it 1506 * should be attached immediately. 1507 */ 1508 static int 1509 acpi_probe_order(ACPI_HANDLE handle, int *order) 1510 { 1511 1512 /* 1513 * 1. I/O port and memory system resource holders 1514 * 2. Embedded controllers (to handle early accesses) 1515 * 3. PCI Link Devices 1516 */ 1517 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1518 *order = 1; 1519 else if (acpi_MatchHid(handle, "PNP0C09")) 1520 *order = 2; 1521 else if (acpi_MatchHid(handle, "PNP0C0F")) 1522 *order = 3; 1523 return (0); 1524 } 1525 1526 /* 1527 * Evaluate a child device and determine whether we might attach a device to 1528 * it. 1529 */ 1530 static ACPI_STATUS 1531 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1532 { 1533 ACPI_OBJECT_TYPE type; 1534 ACPI_HANDLE h; 1535 device_t bus, child; 1536 int order; 1537 char *handle_str, **search; 1538 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1539 1540 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1541 1542 /* Skip this device if we think we'll have trouble with it. */ 1543 if (acpi_avoid(handle)) 1544 return_ACPI_STATUS (AE_OK); 1545 1546 bus = (device_t)context; 1547 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1548 switch (type) { 1549 case ACPI_TYPE_DEVICE: 1550 case ACPI_TYPE_PROCESSOR: 1551 case ACPI_TYPE_THERMAL: 1552 case ACPI_TYPE_POWER: 1553 if (acpi_disabled("children")) 1554 break; 1555 1556 /* 1557 * Since we scan from \, be sure to skip system scope objects. 1558 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1559 */ 1560 handle_str = acpi_name(handle); 1561 for (search = scopes; *search != NULL; search++) { 1562 if (strcmp(handle_str, *search) == 0) 1563 break; 1564 } 1565 if (*search != NULL) 1566 break; 1567 1568 /* 1569 * Create a placeholder device for this node. Sort the placeholder 1570 * so that the probe/attach passes will run breadth-first. Orders 1571 * less than 10 are reserved for special objects (i.e., system 1572 * resources). Larger values are used for all other devices. 1573 */ 1574 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1575 order = (level + 1) * 10; 1576 acpi_probe_order(handle, &order); 1577 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1578 if (child == NULL) 1579 break; 1580 1581 /* Associate the handle with the device_t and vice versa. */ 1582 acpi_set_handle(child, handle); 1583 AcpiAttachData(handle, acpi_fake_objhandler, child); 1584 1585 /* 1586 * Check that the device is present. If it's not present, 1587 * leave it disabled (so that we have a device_t attached to 1588 * the handle, but we don't probe it). 1589 * 1590 * XXX PCI link devices sometimes report "present" but not 1591 * "functional" (i.e. if disabled). Go ahead and probe them 1592 * anyway since we may enable them later. 1593 */ 1594 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1595 /* Never disable PCI link devices. */ 1596 if (acpi_MatchHid(handle, "PNP0C0F")) 1597 break; 1598 /* 1599 * Docking stations should remain enabled since the system 1600 * may be undocked at boot. 1601 */ 1602 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1603 break; 1604 1605 device_disable(child); 1606 break; 1607 } 1608 1609 /* 1610 * Get the device's resource settings and attach them. 1611 * Note that if the device has _PRS but no _CRS, we need 1612 * to decide when it's appropriate to try to configure the 1613 * device. Ignore the return value here; it's OK for the 1614 * device not to have any resources. 1615 */ 1616 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1617 break; 1618 } 1619 } 1620 1621 return_ACPI_STATUS (AE_OK); 1622 } 1623 1624 /* 1625 * AcpiAttachData() requires an object handler but never uses it. This is a 1626 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1627 */ 1628 void 1629 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1630 { 1631 } 1632 1633 static void 1634 acpi_shutdown_final(void *arg, int howto) 1635 { 1636 ACPI_STATUS status; 1637 1638 /* 1639 * XXX Shutdown code should only run on the BSP (cpuid 0). 1640 * Some chipsets do not power off the system correctly if called from 1641 * an AP. 1642 */ 1643 if ((howto & RB_POWEROFF) != 0) { 1644 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1645 if (ACPI_FAILURE(status)) { 1646 printf("AcpiEnterSleepStatePrep failed - %s\n", 1647 AcpiFormatException(status)); 1648 return; 1649 } 1650 printf("Powering system off using ACPI\n"); 1651 ACPI_DISABLE_IRQS(); 1652 status = AcpiEnterSleepState(ACPI_STATE_S5); 1653 if (ACPI_FAILURE(status)) { 1654 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1655 } else { 1656 DELAY(1000000); 1657 printf("ACPI power-off failed - timeout\n"); 1658 } 1659 } else if ((howto & RB_AUTOBOOT) != 0 && AcpiGbl_FADT->ResetRegSup) { 1660 status = AcpiHwLowLevelWrite( 1661 AcpiGbl_FADT->ResetRegister.RegisterBitWidth, 1662 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister); 1663 if (ACPI_FAILURE(status)) { 1664 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1665 } else { 1666 DELAY(1000000); 1667 printf("ACPI reset failed - timeout\n"); 1668 } 1669 } else if (panicstr == NULL) { 1670 printf("Shutting down ACPI\n"); 1671 AcpiTerminate(); 1672 } 1673 } 1674 1675 static void 1676 acpi_enable_fixed_events(struct acpi_softc *sc) 1677 { 1678 static int first_time = 1; 1679 1680 /* Enable and clear fixed events and install handlers. */ 1681 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1682 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1683 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1684 acpi_event_power_button_sleep, sc); 1685 if (first_time) 1686 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1687 } 1688 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1689 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1690 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1691 acpi_event_sleep_button_sleep, sc); 1692 if (first_time) 1693 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1694 } 1695 1696 first_time = 0; 1697 } 1698 1699 /* 1700 * Returns true if the device is actually present and should 1701 * be attached to. This requires the present, enabled, UI-visible 1702 * and diagnostics-passed bits to be set. 1703 */ 1704 BOOLEAN 1705 acpi_DeviceIsPresent(device_t dev) 1706 { 1707 ACPI_DEVICE_INFO *devinfo; 1708 ACPI_HANDLE h; 1709 ACPI_BUFFER buf; 1710 ACPI_STATUS error; 1711 int ret; 1712 1713 ret = FALSE; 1714 if ((h = acpi_get_handle(dev)) == NULL) 1715 return (FALSE); 1716 buf.Pointer = NULL; 1717 buf.Length = ACPI_ALLOCATE_BUFFER; 1718 error = AcpiGetObjectInfo(h, &buf); 1719 if (ACPI_FAILURE(error)) 1720 return (FALSE); 1721 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1722 1723 /* If no _STA method, must be present */ 1724 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1725 ret = TRUE; 1726 1727 /* Return true for 'present' and 'functioning' */ 1728 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1729 ret = TRUE; 1730 1731 AcpiOsFree(buf.Pointer); 1732 return (ret); 1733 } 1734 1735 /* 1736 * Returns true if the battery is actually present and inserted. 1737 */ 1738 BOOLEAN 1739 acpi_BatteryIsPresent(device_t dev) 1740 { 1741 ACPI_DEVICE_INFO *devinfo; 1742 ACPI_HANDLE h; 1743 ACPI_BUFFER buf; 1744 ACPI_STATUS error; 1745 int ret; 1746 1747 ret = FALSE; 1748 if ((h = acpi_get_handle(dev)) == NULL) 1749 return (FALSE); 1750 buf.Pointer = NULL; 1751 buf.Length = ACPI_ALLOCATE_BUFFER; 1752 error = AcpiGetObjectInfo(h, &buf); 1753 if (ACPI_FAILURE(error)) 1754 return (FALSE); 1755 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1756 1757 /* If no _STA method, must be present */ 1758 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1759 ret = TRUE; 1760 1761 /* Return true for 'present', 'battery present', and 'functioning' */ 1762 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1763 ret = TRUE; 1764 1765 AcpiOsFree(buf.Pointer); 1766 return (ret); 1767 } 1768 1769 /* 1770 * Match a HID string against a handle 1771 */ 1772 static BOOLEAN 1773 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1774 { 1775 ACPI_DEVICE_INFO *devinfo; 1776 ACPI_BUFFER buf; 1777 ACPI_STATUS error; 1778 int ret, i; 1779 1780 ret = FALSE; 1781 if (hid == NULL || h == NULL) 1782 return (ret); 1783 buf.Pointer = NULL; 1784 buf.Length = ACPI_ALLOCATE_BUFFER; 1785 error = AcpiGetObjectInfo(h, &buf); 1786 if (ACPI_FAILURE(error)) 1787 return (ret); 1788 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1789 1790 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1791 strcmp(hid, devinfo->HardwareId.Value) == 0) 1792 ret = TRUE; 1793 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1794 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1795 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1796 ret = TRUE; 1797 break; 1798 } 1799 } 1800 } 1801 1802 AcpiOsFree(buf.Pointer); 1803 return (ret); 1804 } 1805 1806 /* 1807 * Return the handle of a named object within our scope, ie. that of (parent) 1808 * or one if its parents. 1809 */ 1810 ACPI_STATUS 1811 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1812 { 1813 ACPI_HANDLE r; 1814 ACPI_STATUS status; 1815 1816 /* Walk back up the tree to the root */ 1817 for (;;) { 1818 status = AcpiGetHandle(parent, path, &r); 1819 if (ACPI_SUCCESS(status)) { 1820 *result = r; 1821 return (AE_OK); 1822 } 1823 /* XXX Return error here? */ 1824 if (status != AE_NOT_FOUND) 1825 return (AE_OK); 1826 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1827 return (AE_NOT_FOUND); 1828 parent = r; 1829 } 1830 } 1831 1832 /* Find the difference between two PM tick counts. */ 1833 uint32_t 1834 acpi_TimerDelta(uint32_t end, uint32_t start) 1835 { 1836 uint32_t delta; 1837 1838 if (end >= start) 1839 delta = end - start; 1840 else if (AcpiGbl_FADT->TmrValExt == 0) 1841 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1842 else 1843 delta = ((0xFFFFFFFF - start) + end + 1); 1844 return (delta); 1845 } 1846 1847 /* 1848 * Allocate a buffer with a preset data size. 1849 */ 1850 ACPI_BUFFER * 1851 acpi_AllocBuffer(int size) 1852 { 1853 ACPI_BUFFER *buf; 1854 1855 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1856 return (NULL); 1857 buf->Length = size; 1858 buf->Pointer = (void *)(buf + 1); 1859 return (buf); 1860 } 1861 1862 ACPI_STATUS 1863 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1864 { 1865 ACPI_OBJECT arg1; 1866 ACPI_OBJECT_LIST args; 1867 1868 arg1.Type = ACPI_TYPE_INTEGER; 1869 arg1.Integer.Value = number; 1870 args.Count = 1; 1871 args.Pointer = &arg1; 1872 1873 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1874 } 1875 1876 /* 1877 * Evaluate a path that should return an integer. 1878 */ 1879 ACPI_STATUS 1880 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1881 { 1882 ACPI_STATUS status; 1883 ACPI_BUFFER buf; 1884 ACPI_OBJECT param; 1885 1886 if (handle == NULL) 1887 handle = ACPI_ROOT_OBJECT; 1888 1889 /* 1890 * Assume that what we've been pointed at is an Integer object, or 1891 * a method that will return an Integer. 1892 */ 1893 buf.Pointer = ¶m; 1894 buf.Length = sizeof(param); 1895 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1896 if (ACPI_SUCCESS(status)) { 1897 if (param.Type == ACPI_TYPE_INTEGER) 1898 *number = param.Integer.Value; 1899 else 1900 status = AE_TYPE; 1901 } 1902 1903 /* 1904 * In some applications, a method that's expected to return an Integer 1905 * may instead return a Buffer (probably to simplify some internal 1906 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1907 * convert it into an Integer as best we can. 1908 * 1909 * This is a hack. 1910 */ 1911 if (status == AE_BUFFER_OVERFLOW) { 1912 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1913 status = AE_NO_MEMORY; 1914 } else { 1915 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1916 if (ACPI_SUCCESS(status)) 1917 status = acpi_ConvertBufferToInteger(&buf, number); 1918 AcpiOsFree(buf.Pointer); 1919 } 1920 } 1921 return (status); 1922 } 1923 1924 ACPI_STATUS 1925 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1926 { 1927 ACPI_OBJECT *p; 1928 UINT8 *val; 1929 int i; 1930 1931 p = (ACPI_OBJECT *)bufp->Pointer; 1932 if (p->Type == ACPI_TYPE_INTEGER) { 1933 *number = p->Integer.Value; 1934 return (AE_OK); 1935 } 1936 if (p->Type != ACPI_TYPE_BUFFER) 1937 return (AE_TYPE); 1938 if (p->Buffer.Length > sizeof(int)) 1939 return (AE_BAD_DATA); 1940 1941 *number = 0; 1942 val = p->Buffer.Pointer; 1943 for (i = 0; i < p->Buffer.Length; i++) 1944 *number += val[i] << (i * 8); 1945 return (AE_OK); 1946 } 1947 1948 /* 1949 * Iterate over the elements of an a package object, calling the supplied 1950 * function for each element. 1951 * 1952 * XXX possible enhancement might be to abort traversal on error. 1953 */ 1954 ACPI_STATUS 1955 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1956 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1957 { 1958 ACPI_OBJECT *comp; 1959 int i; 1960 1961 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1962 return (AE_BAD_PARAMETER); 1963 1964 /* Iterate over components */ 1965 i = 0; 1966 comp = pkg->Package.Elements; 1967 for (; i < pkg->Package.Count; i++, comp++) 1968 func(comp, arg); 1969 1970 return (AE_OK); 1971 } 1972 1973 /* 1974 * Find the (index)th resource object in a set. 1975 */ 1976 ACPI_STATUS 1977 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1978 { 1979 ACPI_RESOURCE *rp; 1980 int i; 1981 1982 rp = (ACPI_RESOURCE *)buf->Pointer; 1983 i = index; 1984 while (i-- > 0) { 1985 /* Range check */ 1986 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1987 return (AE_BAD_PARAMETER); 1988 1989 /* Check for terminator */ 1990 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 1991 return (AE_NOT_FOUND); 1992 rp = ACPI_NEXT_RESOURCE(rp); 1993 } 1994 if (resp != NULL) 1995 *resp = rp; 1996 1997 return (AE_OK); 1998 } 1999 2000 /* 2001 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2002 * 2003 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2004 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2005 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2006 * resources. 2007 */ 2008 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2009 2010 ACPI_STATUS 2011 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2012 { 2013 ACPI_RESOURCE *rp; 2014 void *newp; 2015 2016 /* Initialise the buffer if necessary. */ 2017 if (buf->Pointer == NULL) { 2018 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2019 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2020 return (AE_NO_MEMORY); 2021 rp = (ACPI_RESOURCE *)buf->Pointer; 2022 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2023 rp->Length = 0; 2024 } 2025 if (res == NULL) 2026 return (AE_OK); 2027 2028 /* 2029 * Scan the current buffer looking for the terminator. 2030 * This will either find the terminator or hit the end 2031 * of the buffer and return an error. 2032 */ 2033 rp = (ACPI_RESOURCE *)buf->Pointer; 2034 for (;;) { 2035 /* Range check, don't go outside the buffer */ 2036 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2037 return (AE_BAD_PARAMETER); 2038 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2039 break; 2040 rp = ACPI_NEXT_RESOURCE(rp); 2041 } 2042 2043 /* 2044 * Check the size of the buffer and expand if required. 2045 * 2046 * Required size is: 2047 * size of existing resources before terminator + 2048 * size of new resource and header + 2049 * size of terminator. 2050 * 2051 * Note that this loop should really only run once, unless 2052 * for some reason we are stuffing a *really* huge resource. 2053 */ 2054 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2055 res->Length + ACPI_RS_SIZE_NO_DATA + 2056 ACPI_RS_SIZE_MIN) >= buf->Length) { 2057 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2058 return (AE_NO_MEMORY); 2059 bcopy(buf->Pointer, newp, buf->Length); 2060 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2061 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2062 AcpiOsFree(buf->Pointer); 2063 buf->Pointer = newp; 2064 buf->Length += buf->Length; 2065 } 2066 2067 /* Insert the new resource. */ 2068 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2069 2070 /* And add the terminator. */ 2071 rp = ACPI_NEXT_RESOURCE(rp); 2072 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2073 rp->Length = 0; 2074 2075 return (AE_OK); 2076 } 2077 2078 /* 2079 * Set interrupt model. 2080 */ 2081 ACPI_STATUS 2082 acpi_SetIntrModel(int model) 2083 { 2084 2085 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2086 } 2087 2088 static void 2089 acpi_sleep_enable(void *arg) 2090 { 2091 2092 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2093 } 2094 2095 enum acpi_sleep_state { 2096 ACPI_SS_NONE, 2097 ACPI_SS_GPE_SET, 2098 ACPI_SS_DEV_SUSPEND, 2099 ACPI_SS_SLP_PREP, 2100 ACPI_SS_SLEPT, 2101 }; 2102 2103 /* 2104 * Set the system sleep state 2105 * 2106 * Currently we support S1-S5 but S4 is only S4BIOS 2107 */ 2108 ACPI_STATUS 2109 acpi_SetSleepState(struct acpi_softc *sc, int state) 2110 { 2111 ACPI_STATUS status; 2112 UINT8 TypeA; 2113 UINT8 TypeB; 2114 enum acpi_sleep_state slp_state; 2115 2116 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2117 2118 status = AE_OK; 2119 ACPI_LOCK(acpi); 2120 if (sc->acpi_sleep_disabled) { 2121 if (sc->acpi_sstate != ACPI_STATE_S0) 2122 status = AE_ERROR; 2123 ACPI_UNLOCK(acpi); 2124 printf("acpi: suspend request ignored (not ready yet)\n"); 2125 return (status); 2126 } 2127 sc->acpi_sleep_disabled = 1; 2128 ACPI_UNLOCK(acpi); 2129 2130 /* 2131 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2132 * drivers need this. 2133 */ 2134 mtx_lock(&Giant); 2135 slp_state = ACPI_SS_NONE; 2136 switch (state) { 2137 case ACPI_STATE_S1: 2138 case ACPI_STATE_S2: 2139 case ACPI_STATE_S3: 2140 case ACPI_STATE_S4: 2141 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2142 if (status == AE_NOT_FOUND) { 2143 device_printf(sc->acpi_dev, 2144 "Sleep state S%d not supported by BIOS\n", state); 2145 break; 2146 } else if (ACPI_FAILURE(status)) { 2147 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2148 AcpiFormatException(status)); 2149 break; 2150 } 2151 2152 sc->acpi_sstate = state; 2153 2154 /* Enable any GPEs as appropriate and requested by the user. */ 2155 acpi_wake_prep_walk(state); 2156 slp_state = ACPI_SS_GPE_SET; 2157 2158 /* 2159 * Inform all devices that we are going to sleep. If at least one 2160 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2161 * 2162 * XXX Note that a better two-pass approach with a 'veto' pass 2163 * followed by a "real thing" pass would be better, but the current 2164 * bus interface does not provide for this. 2165 */ 2166 if (DEVICE_SUSPEND(root_bus) != 0) { 2167 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2168 break; 2169 } 2170 slp_state = ACPI_SS_DEV_SUSPEND; 2171 2172 status = AcpiEnterSleepStatePrep(state); 2173 if (ACPI_FAILURE(status)) { 2174 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2175 AcpiFormatException(status)); 2176 break; 2177 } 2178 slp_state = ACPI_SS_SLP_PREP; 2179 2180 if (sc->acpi_sleep_delay > 0) 2181 DELAY(sc->acpi_sleep_delay * 1000000); 2182 2183 if (state != ACPI_STATE_S1) { 2184 acpi_sleep_machdep(sc, state); 2185 2186 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2187 if (state == ACPI_STATE_S4) 2188 AcpiEnable(); 2189 } else { 2190 ACPI_DISABLE_IRQS(); 2191 status = AcpiEnterSleepState(state); 2192 if (ACPI_FAILURE(status)) { 2193 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2194 AcpiFormatException(status)); 2195 break; 2196 } 2197 } 2198 slp_state = ACPI_SS_SLEPT; 2199 break; 2200 case ACPI_STATE_S5: 2201 /* 2202 * Shut down cleanly and power off. This will call us back through the 2203 * shutdown handlers. 2204 */ 2205 shutdown_nice(RB_POWEROFF); 2206 break; 2207 case ACPI_STATE_S0: 2208 default: 2209 status = AE_BAD_PARAMETER; 2210 break; 2211 } 2212 2213 /* 2214 * Back out state according to how far along we got in the suspend 2215 * process. This handles both the error and success cases. 2216 */ 2217 if (slp_state >= ACPI_SS_GPE_SET) { 2218 acpi_wake_prep_walk(state); 2219 sc->acpi_sstate = ACPI_STATE_S0; 2220 } 2221 if (slp_state >= ACPI_SS_SLP_PREP) 2222 AcpiLeaveSleepState(state); 2223 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2224 DEVICE_RESUME(root_bus); 2225 if (slp_state >= ACPI_SS_SLEPT) 2226 acpi_enable_fixed_events(sc); 2227 2228 /* Allow another sleep request after a while. */ 2229 if (state != ACPI_STATE_S5) 2230 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2231 2232 mtx_unlock(&Giant); 2233 return_ACPI_STATUS (status); 2234 } 2235 2236 /* Initialize a device's wake GPE. */ 2237 int 2238 acpi_wake_init(device_t dev, int type) 2239 { 2240 struct acpi_prw_data prw; 2241 2242 /* Evaluate _PRW to find the GPE. */ 2243 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2244 return (ENXIO); 2245 2246 /* Set the requested type for the GPE (runtime, wake, or both). */ 2247 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2248 device_printf(dev, "set GPE type failed\n"); 2249 return (ENXIO); 2250 } 2251 2252 return (0); 2253 } 2254 2255 /* Enable or disable the device's wake GPE. */ 2256 int 2257 acpi_wake_set_enable(device_t dev, int enable) 2258 { 2259 struct acpi_prw_data prw; 2260 ACPI_HANDLE handle; 2261 ACPI_STATUS status; 2262 int flags; 2263 2264 /* Make sure the device supports waking the system and get the GPE. */ 2265 handle = acpi_get_handle(dev); 2266 if (acpi_parse_prw(handle, &prw) != 0) 2267 return (ENXIO); 2268 2269 flags = acpi_get_flags(dev); 2270 if (enable) { 2271 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2272 if (ACPI_FAILURE(status)) { 2273 device_printf(dev, "enable wake failed\n"); 2274 return (ENXIO); 2275 } 2276 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2277 } else { 2278 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2279 if (ACPI_FAILURE(status)) { 2280 device_printf(dev, "disable wake failed\n"); 2281 return (ENXIO); 2282 } 2283 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2284 } 2285 2286 return (0); 2287 } 2288 2289 static int 2290 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2291 { 2292 struct acpi_prw_data prw; 2293 device_t dev; 2294 2295 /* Check that this is a wake-capable device and get its GPE. */ 2296 if (acpi_parse_prw(handle, &prw) != 0) 2297 return (ENXIO); 2298 dev = acpi_get_device(handle); 2299 2300 /* 2301 * The destination sleep state must be less than (i.e., higher power) 2302 * or equal to the value specified by _PRW. If this GPE cannot be 2303 * enabled for the next sleep state, then disable it. If it can and 2304 * the user requested it be enabled, turn on any required power resources 2305 * and set _PSW. 2306 */ 2307 if (sstate > prw.lowest_wake) { 2308 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2309 if (bootverbose) 2310 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2311 acpi_name(handle), sstate); 2312 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2313 acpi_pwr_wake_enable(handle, 1); 2314 acpi_SetInteger(handle, "_PSW", 1); 2315 if (bootverbose) 2316 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2317 acpi_name(handle), sstate); 2318 } 2319 2320 return (0); 2321 } 2322 2323 static int 2324 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2325 { 2326 struct acpi_prw_data prw; 2327 device_t dev; 2328 2329 /* 2330 * Check that this is a wake-capable device and get its GPE. Return 2331 * now if the user didn't enable this device for wake. 2332 */ 2333 if (acpi_parse_prw(handle, &prw) != 0) 2334 return (ENXIO); 2335 dev = acpi_get_device(handle); 2336 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2337 return (0); 2338 2339 /* 2340 * If this GPE couldn't be enabled for the previous sleep state, it was 2341 * disabled before going to sleep so re-enable it. If it was enabled, 2342 * clear _PSW and turn off any power resources it used. 2343 */ 2344 if (sstate > prw.lowest_wake) { 2345 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2346 if (bootverbose) 2347 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2348 } else { 2349 acpi_SetInteger(handle, "_PSW", 0); 2350 acpi_pwr_wake_enable(handle, 0); 2351 if (bootverbose) 2352 device_printf(dev, "run_prep cleaned up for %s\n", 2353 acpi_name(handle)); 2354 } 2355 2356 return (0); 2357 } 2358 2359 static ACPI_STATUS 2360 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2361 { 2362 int sstate; 2363 2364 /* If suspending, run the sleep prep function, otherwise wake. */ 2365 sstate = *(int *)context; 2366 if (AcpiGbl_SystemAwakeAndRunning) 2367 acpi_wake_sleep_prep(handle, sstate); 2368 else 2369 acpi_wake_run_prep(handle, sstate); 2370 return (AE_OK); 2371 } 2372 2373 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2374 static int 2375 acpi_wake_prep_walk(int sstate) 2376 { 2377 ACPI_HANDLE sb_handle; 2378 2379 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2380 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2381 acpi_wake_prep, &sstate, NULL); 2382 return (0); 2383 } 2384 2385 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2386 static int 2387 acpi_wake_sysctl_walk(device_t dev) 2388 { 2389 int error, i, numdevs; 2390 device_t *devlist; 2391 device_t child; 2392 ACPI_STATUS status; 2393 2394 error = device_get_children(dev, &devlist, &numdevs); 2395 if (error != 0 || numdevs == 0) { 2396 if (numdevs == 0) 2397 free(devlist, M_TEMP); 2398 return (error); 2399 } 2400 for (i = 0; i < numdevs; i++) { 2401 child = devlist[i]; 2402 acpi_wake_sysctl_walk(child); 2403 if (!device_is_attached(child)) 2404 continue; 2405 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2406 if (ACPI_SUCCESS(status)) { 2407 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2408 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2409 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2410 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2411 } 2412 } 2413 free(devlist, M_TEMP); 2414 2415 return (0); 2416 } 2417 2418 /* Enable or disable wake from userland. */ 2419 static int 2420 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2421 { 2422 int enable, error; 2423 device_t dev; 2424 2425 dev = (device_t)arg1; 2426 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2427 2428 error = sysctl_handle_int(oidp, &enable, 0, req); 2429 if (error != 0 || req->newptr == NULL) 2430 return (error); 2431 if (enable != 0 && enable != 1) 2432 return (EINVAL); 2433 2434 return (acpi_wake_set_enable(dev, enable)); 2435 } 2436 2437 /* Parse a device's _PRW into a structure. */ 2438 int 2439 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2440 { 2441 ACPI_STATUS status; 2442 ACPI_BUFFER prw_buffer; 2443 ACPI_OBJECT *res, *res2; 2444 int error, i, power_count; 2445 2446 if (h == NULL || prw == NULL) 2447 return (EINVAL); 2448 2449 /* 2450 * The _PRW object (7.2.9) is only required for devices that have the 2451 * ability to wake the system from a sleeping state. 2452 */ 2453 error = EINVAL; 2454 prw_buffer.Pointer = NULL; 2455 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2456 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2457 if (ACPI_FAILURE(status)) 2458 return (ENOENT); 2459 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2460 if (res == NULL) 2461 return (ENOENT); 2462 if (!ACPI_PKG_VALID(res, 2)) 2463 goto out; 2464 2465 /* 2466 * Element 1 of the _PRW object: 2467 * The lowest power system sleeping state that can be entered while still 2468 * providing wake functionality. The sleeping state being entered must 2469 * be less than (i.e., higher power) or equal to this value. 2470 */ 2471 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2472 goto out; 2473 2474 /* 2475 * Element 0 of the _PRW object: 2476 */ 2477 switch (res->Package.Elements[0].Type) { 2478 case ACPI_TYPE_INTEGER: 2479 /* 2480 * If the data type of this package element is numeric, then this 2481 * _PRW package element is the bit index in the GPEx_EN, in the 2482 * GPE blocks described in the FADT, of the enable bit that is 2483 * enabled for the wake event. 2484 */ 2485 prw->gpe_handle = NULL; 2486 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2487 error = 0; 2488 break; 2489 case ACPI_TYPE_PACKAGE: 2490 /* 2491 * If the data type of this package element is a package, then this 2492 * _PRW package element is itself a package containing two 2493 * elements. The first is an object reference to the GPE Block 2494 * device that contains the GPE that will be triggered by the wake 2495 * event. The second element is numeric and it contains the bit 2496 * index in the GPEx_EN, in the GPE Block referenced by the 2497 * first element in the package, of the enable bit that is enabled for 2498 * the wake event. 2499 * 2500 * For example, if this field is a package then it is of the form: 2501 * Package() {\_SB.PCI0.ISA.GPE, 2} 2502 */ 2503 res2 = &res->Package.Elements[0]; 2504 if (!ACPI_PKG_VALID(res2, 2)) 2505 goto out; 2506 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2507 if (prw->gpe_handle == NULL) 2508 goto out; 2509 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2510 goto out; 2511 error = 0; 2512 break; 2513 default: 2514 goto out; 2515 } 2516 2517 /* Elements 2 to N of the _PRW object are power resources. */ 2518 power_count = res->Package.Count - 2; 2519 if (power_count > ACPI_PRW_MAX_POWERRES) { 2520 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2521 power_count = 0; 2522 } 2523 prw->power_res_count = power_count; 2524 for (i = 0; i < power_count; i++) 2525 prw->power_res[i] = res->Package.Elements[i]; 2526 2527 out: 2528 if (prw_buffer.Pointer != NULL) 2529 AcpiOsFree(prw_buffer.Pointer); 2530 return (error); 2531 } 2532 2533 /* 2534 * ACPI Event Handlers 2535 */ 2536 2537 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2538 2539 static void 2540 acpi_system_eventhandler_sleep(void *arg, int state) 2541 { 2542 2543 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2544 2545 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2546 acpi_SetSleepState((struct acpi_softc *)arg, state); 2547 2548 return_VOID; 2549 } 2550 2551 static void 2552 acpi_system_eventhandler_wakeup(void *arg, int state) 2553 { 2554 2555 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2556 2557 /* Currently, nothing to do for wakeup. */ 2558 2559 return_VOID; 2560 } 2561 2562 /* 2563 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2564 */ 2565 UINT32 2566 acpi_event_power_button_sleep(void *context) 2567 { 2568 struct acpi_softc *sc = (struct acpi_softc *)context; 2569 2570 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2571 2572 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2573 2574 return_VALUE (ACPI_INTERRUPT_HANDLED); 2575 } 2576 2577 UINT32 2578 acpi_event_power_button_wake(void *context) 2579 { 2580 struct acpi_softc *sc = (struct acpi_softc *)context; 2581 2582 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2583 2584 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2585 2586 return_VALUE (ACPI_INTERRUPT_HANDLED); 2587 } 2588 2589 UINT32 2590 acpi_event_sleep_button_sleep(void *context) 2591 { 2592 struct acpi_softc *sc = (struct acpi_softc *)context; 2593 2594 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2595 2596 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2597 2598 return_VALUE (ACPI_INTERRUPT_HANDLED); 2599 } 2600 2601 UINT32 2602 acpi_event_sleep_button_wake(void *context) 2603 { 2604 struct acpi_softc *sc = (struct acpi_softc *)context; 2605 2606 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2607 2608 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2609 2610 return_VALUE (ACPI_INTERRUPT_HANDLED); 2611 } 2612 2613 /* 2614 * XXX This static buffer is suboptimal. There is no locking so only 2615 * use this for single-threaded callers. 2616 */ 2617 char * 2618 acpi_name(ACPI_HANDLE handle) 2619 { 2620 ACPI_BUFFER buf; 2621 static char data[256]; 2622 2623 buf.Length = sizeof(data); 2624 buf.Pointer = data; 2625 2626 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2627 return (data); 2628 return ("(unknown)"); 2629 } 2630 2631 /* 2632 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2633 * parts of the namespace. 2634 */ 2635 int 2636 acpi_avoid(ACPI_HANDLE handle) 2637 { 2638 char *cp, *env, *np; 2639 int len; 2640 2641 np = acpi_name(handle); 2642 if (*np == '\\') 2643 np++; 2644 if ((env = getenv("debug.acpi.avoid")) == NULL) 2645 return (0); 2646 2647 /* Scan the avoid list checking for a match */ 2648 cp = env; 2649 for (;;) { 2650 while (*cp != 0 && isspace(*cp)) 2651 cp++; 2652 if (*cp == 0) 2653 break; 2654 len = 0; 2655 while (cp[len] != 0 && !isspace(cp[len])) 2656 len++; 2657 if (!strncmp(cp, np, len)) { 2658 freeenv(env); 2659 return(1); 2660 } 2661 cp += len; 2662 } 2663 freeenv(env); 2664 2665 return (0); 2666 } 2667 2668 /* 2669 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2670 */ 2671 int 2672 acpi_disabled(char *subsys) 2673 { 2674 char *cp, *env; 2675 int len; 2676 2677 if ((env = getenv("debug.acpi.disabled")) == NULL) 2678 return (0); 2679 if (strcmp(env, "all") == 0) { 2680 freeenv(env); 2681 return (1); 2682 } 2683 2684 /* Scan the disable list, checking for a match. */ 2685 cp = env; 2686 for (;;) { 2687 while (*cp != '\0' && isspace(*cp)) 2688 cp++; 2689 if (*cp == '\0') 2690 break; 2691 len = 0; 2692 while (cp[len] != '\0' && !isspace(cp[len])) 2693 len++; 2694 if (strncmp(cp, subsys, len) == 0) { 2695 freeenv(env); 2696 return (1); 2697 } 2698 cp += len; 2699 } 2700 freeenv(env); 2701 2702 return (0); 2703 } 2704 2705 /* 2706 * Control interface. 2707 * 2708 * We multiplex ioctls for all participating ACPI devices here. Individual 2709 * drivers wanting to be accessible via /dev/acpi should use the 2710 * register/deregister interface to make their handlers visible. 2711 */ 2712 struct acpi_ioctl_hook 2713 { 2714 TAILQ_ENTRY(acpi_ioctl_hook) link; 2715 u_long cmd; 2716 acpi_ioctl_fn fn; 2717 void *arg; 2718 }; 2719 2720 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2721 static int acpi_ioctl_hooks_initted; 2722 2723 int 2724 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2725 { 2726 struct acpi_ioctl_hook *hp; 2727 2728 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2729 return (ENOMEM); 2730 hp->cmd = cmd; 2731 hp->fn = fn; 2732 hp->arg = arg; 2733 2734 ACPI_LOCK(acpi); 2735 if (acpi_ioctl_hooks_initted == 0) { 2736 TAILQ_INIT(&acpi_ioctl_hooks); 2737 acpi_ioctl_hooks_initted = 1; 2738 } 2739 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2740 ACPI_UNLOCK(acpi); 2741 2742 return (0); 2743 } 2744 2745 void 2746 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2747 { 2748 struct acpi_ioctl_hook *hp; 2749 2750 ACPI_LOCK(acpi); 2751 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2752 if (hp->cmd == cmd && hp->fn == fn) 2753 break; 2754 2755 if (hp != NULL) { 2756 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2757 free(hp, M_ACPIDEV); 2758 } 2759 ACPI_UNLOCK(acpi); 2760 } 2761 2762 static int 2763 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2764 { 2765 return (0); 2766 } 2767 2768 static int 2769 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2770 { 2771 return (0); 2772 } 2773 2774 static int 2775 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2776 { 2777 struct acpi_softc *sc; 2778 struct acpi_ioctl_hook *hp; 2779 int error, state; 2780 2781 error = 0; 2782 hp = NULL; 2783 sc = dev->si_drv1; 2784 2785 /* 2786 * Scan the list of registered ioctls, looking for handlers. 2787 */ 2788 ACPI_LOCK(acpi); 2789 if (acpi_ioctl_hooks_initted) 2790 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2791 if (hp->cmd == cmd) 2792 break; 2793 } 2794 ACPI_UNLOCK(acpi); 2795 if (hp) 2796 return (hp->fn(cmd, addr, hp->arg)); 2797 2798 /* 2799 * Core ioctls are not permitted for non-writable user. 2800 * Currently, other ioctls just fetch information. 2801 * Not changing system behavior. 2802 */ 2803 if ((flag & FWRITE) == 0) 2804 return (EPERM); 2805 2806 /* Core system ioctls. */ 2807 switch (cmd) { 2808 case ACPIIO_SETSLPSTATE: 2809 error = EINVAL; 2810 state = *(int *)addr; 2811 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2812 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2813 error = 0; 2814 break; 2815 default: 2816 error = ENXIO; 2817 break; 2818 } 2819 2820 return (error); 2821 } 2822 2823 static int 2824 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2825 { 2826 int error; 2827 struct sbuf sb; 2828 UINT8 state, TypeA, TypeB; 2829 2830 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2831 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2832 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2833 sbuf_printf(&sb, "S%d ", state); 2834 sbuf_trim(&sb); 2835 sbuf_finish(&sb); 2836 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2837 sbuf_delete(&sb); 2838 return (error); 2839 } 2840 2841 static int 2842 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2843 { 2844 char sleep_state[10]; 2845 int error; 2846 u_int new_state, old_state; 2847 2848 old_state = *(u_int *)oidp->oid_arg1; 2849 if (old_state > ACPI_S_STATES_MAX + 1) 2850 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2851 else 2852 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2853 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2854 if (error == 0 && req->newptr != NULL) { 2855 new_state = ACPI_STATE_S0; 2856 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2857 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2858 break; 2859 if (new_state <= ACPI_S_STATES_MAX + 1) { 2860 if (new_state != old_state) 2861 *(u_int *)oidp->oid_arg1 = new_state; 2862 } else 2863 error = EINVAL; 2864 } 2865 2866 return (error); 2867 } 2868 2869 /* Inform devctl(4) when we receive a Notify. */ 2870 void 2871 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2872 { 2873 char notify_buf[16]; 2874 ACPI_BUFFER handle_buf; 2875 ACPI_STATUS status; 2876 2877 if (subsystem == NULL) 2878 return; 2879 2880 handle_buf.Pointer = NULL; 2881 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2882 status = AcpiNsHandleToPathname(h, &handle_buf); 2883 if (ACPI_FAILURE(status)) 2884 return; 2885 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2886 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2887 AcpiOsFree(handle_buf.Pointer); 2888 } 2889 2890 #ifdef ACPI_DEBUG 2891 /* 2892 * Support for parsing debug options from the kernel environment. 2893 * 2894 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2895 * by specifying the names of the bits in the debug.acpi.layer and 2896 * debug.acpi.level environment variables. Bits may be unset by 2897 * prefixing the bit name with !. 2898 */ 2899 struct debugtag 2900 { 2901 char *name; 2902 UINT32 value; 2903 }; 2904 2905 static struct debugtag dbg_layer[] = { 2906 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2907 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2908 {"ACPI_EVENTS", ACPI_EVENTS}, 2909 {"ACPI_TABLES", ACPI_TABLES}, 2910 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2911 {"ACPI_PARSER", ACPI_PARSER}, 2912 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2913 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2914 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2915 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2916 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2917 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2918 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2919 2920 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2921 {"ACPI_BATTERY", ACPI_BATTERY}, 2922 {"ACPI_BUS", ACPI_BUS}, 2923 {"ACPI_BUTTON", ACPI_BUTTON}, 2924 {"ACPI_EC", ACPI_EC}, 2925 {"ACPI_FAN", ACPI_FAN}, 2926 {"ACPI_POWERRES", ACPI_POWERRES}, 2927 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2928 {"ACPI_THERMAL", ACPI_THERMAL}, 2929 {"ACPI_TIMER", ACPI_TIMER}, 2930 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2931 {NULL, 0} 2932 }; 2933 2934 static struct debugtag dbg_level[] = { 2935 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2936 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2937 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2938 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2939 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2940 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2941 2942 /* Trace verbosity level 1 [Standard Trace Level] */ 2943 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2944 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2945 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2946 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2947 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2948 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2949 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2950 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2951 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2952 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2953 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2954 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2955 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2956 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2957 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2958 2959 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2960 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2961 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2962 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2963 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2964 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2965 2966 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2967 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2968 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2969 {"ACPI_LV_IO", ACPI_LV_IO}, 2970 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2971 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2972 2973 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2974 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2975 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2976 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2977 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2978 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2979 {NULL, 0} 2980 }; 2981 2982 static void 2983 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2984 { 2985 char *ep; 2986 int i, l; 2987 int set; 2988 2989 while (*cp) { 2990 if (isspace(*cp)) { 2991 cp++; 2992 continue; 2993 } 2994 ep = cp; 2995 while (*ep && !isspace(*ep)) 2996 ep++; 2997 if (*cp == '!') { 2998 set = 0; 2999 cp++; 3000 if (cp == ep) 3001 continue; 3002 } else { 3003 set = 1; 3004 } 3005 l = ep - cp; 3006 for (i = 0; tag[i].name != NULL; i++) { 3007 if (!strncmp(cp, tag[i].name, l)) { 3008 if (set) 3009 *flag |= tag[i].value; 3010 else 3011 *flag &= ~tag[i].value; 3012 } 3013 } 3014 cp = ep; 3015 } 3016 } 3017 3018 static void 3019 acpi_set_debugging(void *junk) 3020 { 3021 char *layer, *level; 3022 3023 if (cold) { 3024 AcpiDbgLayer = 0; 3025 AcpiDbgLevel = 0; 3026 } 3027 3028 layer = getenv("debug.acpi.layer"); 3029 level = getenv("debug.acpi.level"); 3030 if (layer == NULL && level == NULL) 3031 return; 3032 3033 printf("ACPI set debug"); 3034 if (layer != NULL) { 3035 if (strcmp("NONE", layer) != 0) 3036 printf(" layer '%s'", layer); 3037 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3038 freeenv(layer); 3039 } 3040 if (level != NULL) { 3041 if (strcmp("NONE", level) != 0) 3042 printf(" level '%s'", level); 3043 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3044 freeenv(level); 3045 } 3046 printf("\n"); 3047 } 3048 3049 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3050 NULL); 3051 3052 static int 3053 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3054 { 3055 int error, *dbg; 3056 struct debugtag *tag; 3057 struct sbuf sb; 3058 3059 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3060 return (ENOMEM); 3061 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3062 tag = &dbg_layer[0]; 3063 dbg = &AcpiDbgLayer; 3064 } else { 3065 tag = &dbg_level[0]; 3066 dbg = &AcpiDbgLevel; 3067 } 3068 3069 /* Get old values if this is a get request. */ 3070 ACPI_SERIAL_BEGIN(acpi); 3071 if (*dbg == 0) { 3072 sbuf_cpy(&sb, "NONE"); 3073 } else if (req->newptr == NULL) { 3074 for (; tag->name != NULL; tag++) { 3075 if ((*dbg & tag->value) == tag->value) 3076 sbuf_printf(&sb, "%s ", tag->name); 3077 } 3078 } 3079 sbuf_trim(&sb); 3080 sbuf_finish(&sb); 3081 3082 /* Copy out the old values to the user. */ 3083 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3084 sbuf_delete(&sb); 3085 3086 /* If the user is setting a string, parse it. */ 3087 if (error == 0 && req->newptr != NULL) { 3088 *dbg = 0; 3089 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3090 acpi_set_debugging(NULL); 3091 } 3092 ACPI_SERIAL_END(acpi); 3093 3094 return (error); 3095 } 3096 3097 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3098 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3099 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3100 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3101 #endif /* ACPI_DEBUG */ 3102 3103 static int 3104 acpi_pm_func(u_long cmd, void *arg, ...) 3105 { 3106 int state, acpi_state; 3107 int error; 3108 struct acpi_softc *sc; 3109 va_list ap; 3110 3111 error = 0; 3112 switch (cmd) { 3113 case POWER_CMD_SUSPEND: 3114 sc = (struct acpi_softc *)arg; 3115 if (sc == NULL) { 3116 error = EINVAL; 3117 goto out; 3118 } 3119 3120 va_start(ap, arg); 3121 state = va_arg(ap, int); 3122 va_end(ap); 3123 3124 switch (state) { 3125 case POWER_SLEEP_STATE_STANDBY: 3126 acpi_state = sc->acpi_standby_sx; 3127 break; 3128 case POWER_SLEEP_STATE_SUSPEND: 3129 acpi_state = sc->acpi_suspend_sx; 3130 break; 3131 case POWER_SLEEP_STATE_HIBERNATE: 3132 acpi_state = ACPI_STATE_S4; 3133 break; 3134 default: 3135 error = EINVAL; 3136 goto out; 3137 } 3138 3139 acpi_SetSleepState(sc, acpi_state); 3140 break; 3141 default: 3142 error = EINVAL; 3143 goto out; 3144 } 3145 3146 out: 3147 return (error); 3148 } 3149 3150 static void 3151 acpi_pm_register(void *arg) 3152 { 3153 if (!cold || resource_disabled("acpi", 0)) 3154 return; 3155 3156 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3157 } 3158 3159 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3160