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/resource.h> 52 #include <machine/bus.h> 53 #include <sys/rman.h> 54 #include <isa/isavar.h> 55 #include <isa/pnpvar.h> 56 57 #include <contrib/dev/acpica/acpi.h> 58 #include <dev/acpica/acpivar.h> 59 #include <dev/acpica/acpiio.h> 60 #include <contrib/dev/acpica/achware.h> 61 #include <contrib/dev/acpica/acnamesp.h> 62 63 #include "pci_if.h" 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pci_private.h> 66 67 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 68 69 /* Hooks for the ACPI CA debugging infrastructure */ 70 #define _COMPONENT ACPI_BUS 71 ACPI_MODULE_NAME("ACPI") 72 73 static d_open_t acpiopen; 74 static d_close_t acpiclose; 75 static d_ioctl_t acpiioctl; 76 77 static struct cdevsw acpi_cdevsw = { 78 .d_version = D_VERSION, 79 .d_open = acpiopen, 80 .d_close = acpiclose, 81 .d_ioctl = acpiioctl, 82 .d_name = "acpi", 83 }; 84 85 /* Global mutex for locking access to the ACPI subsystem. */ 86 struct mtx acpi_mutex; 87 88 /* Bitmap of device quirks. */ 89 int acpi_quirks; 90 91 static int acpi_modevent(struct module *mod, int event, void *junk); 92 static void acpi_identify(driver_t *driver, device_t parent); 93 static int acpi_probe(device_t dev); 94 static int acpi_attach(device_t dev); 95 static int acpi_suspend(device_t dev); 96 static int acpi_resume(device_t dev); 97 static int acpi_shutdown(device_t dev); 98 static device_t acpi_add_child(device_t bus, int order, const char *name, 99 int unit); 100 static int acpi_print_child(device_t bus, device_t child); 101 static void acpi_probe_nomatch(device_t bus, device_t child); 102 static void acpi_driver_added(device_t dev, driver_t *driver); 103 static int acpi_read_ivar(device_t dev, device_t child, int index, 104 uintptr_t *result); 105 static int acpi_write_ivar(device_t dev, device_t child, int index, 106 uintptr_t value); 107 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 108 static int acpi_sysres_alloc(device_t dev); 109 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type, 110 u_long addr); 111 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 112 int type, int *rid, u_long start, u_long end, 113 u_long count, u_int flags); 114 static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116 static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118 static uint32_t acpi_isa_get_logicalid(device_t dev); 119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130 static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132 static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134 static void acpi_probe_children(device_t bus); 135 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139 static void acpi_shutdown_final(void *arg, int howto); 140 static void acpi_enable_fixed_events(struct acpi_softc *sc); 141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_prep_walk(int sstate); 144 static int acpi_wake_sysctl_walk(device_t dev); 145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146 static void acpi_system_eventhandler_sleep(void *arg, int state); 147 static void acpi_system_eventhandler_wakeup(void *arg, int state); 148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_pm_func(u_long cmd, void *arg, ...); 151 static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156 static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_identify, acpi_identify), 159 DEVMETHOD(device_probe, acpi_probe), 160 DEVMETHOD(device_attach, acpi_attach), 161 DEVMETHOD(device_shutdown, acpi_shutdown), 162 DEVMETHOD(device_detach, bus_generic_detach), 163 DEVMETHOD(device_suspend, acpi_suspend), 164 DEVMETHOD(device_resume, acpi_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_add_child, acpi_add_child), 168 DEVMETHOD(bus_print_child, acpi_print_child), 169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 170 DEVMETHOD(bus_driver_added, acpi_driver_added), 171 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 172 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 177 DEVMETHOD(bus_release_resource, acpi_release_resource), 178 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* ACPI bus */ 187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 191 192 /* PCI emulation */ 193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 194 195 /* ISA emulation */ 196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 197 198 {0, 0} 199 }; 200 201 static driver_t acpi_driver = { 202 "acpi", 203 acpi_methods, 204 sizeof(struct acpi_softc), 205 }; 206 207 static devclass_t acpi_devclass; 208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 209 MODULE_VERSION(acpi, 1); 210 211 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 212 213 /* Local pools for managing system resources for ACPI child devices. */ 214 static struct rman acpi_rman_io, acpi_rman_mem; 215 216 #define ACPI_MINIMUM_AWAKETIME 5 217 218 static const char* sleep_state_names[] = { 219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 220 221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 222 static char acpi_ca_version[12]; 223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 224 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 225 226 /* 227 * Allow override of whether methods execute in parallel or not. 228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 229 * errors for AML that really can't handle parallel method execution. 230 * It is off by default since this breaks recursive methods and 231 * some IBMs use such code. 232 */ 233 static int acpi_serialize_methods; 234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 235 236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 237 static int acpi_do_powerstate = 1; 238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 240 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 241 242 /* Allow users to override quirks. */ 243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 244 245 /* 246 * ACPI can only be loaded as a module by the loader; activating it after 247 * system bootstrap time is not useful, and can be fatal to the system. 248 * It also cannot be unloaded, since the entire system bus heirarchy hangs 249 * off it. 250 */ 251 static int 252 acpi_modevent(struct module *mod, int event, void *junk) 253 { 254 switch (event) { 255 case MOD_LOAD: 256 if (!cold) { 257 printf("The ACPI driver cannot be loaded after boot.\n"); 258 return (EPERM); 259 } 260 break; 261 case MOD_UNLOAD: 262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 263 return (EBUSY); 264 break; 265 default: 266 break; 267 } 268 return (0); 269 } 270 271 /* 272 * Perform early initialization. 273 */ 274 ACPI_STATUS 275 acpi_Startup(void) 276 { 277 static int started = 0; 278 int error, val; 279 280 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 281 282 /* Only run the startup code once. The MADT driver also calls this. */ 283 if (started) 284 return_VALUE (0); 285 started = 1; 286 287 /* Initialise the ACPI mutex */ 288 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 289 290 /* 291 * Set the globals from our tunables. This is needed because ACPI-CA 292 * uses UINT8 for some values and we have no tunable_byte. 293 */ 294 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 295 AcpiGbl_EnableInterpreterSlack = TRUE; 296 297 /* Start up the ACPI CA subsystem. */ 298 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) { 299 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error)); 300 return_VALUE (error); 301 } 302 303 if (ACPI_FAILURE(error = AcpiLoadTables())) { 304 printf("ACPI: table load failed: %s\n", AcpiFormatException(error)); 305 AcpiTerminate(); 306 return_VALUE (error); 307 } 308 309 /* Set up any quirks we have for this system. */ 310 if (acpi_quirks == 0) 311 acpi_table_quirks(&acpi_quirks); 312 313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 315 acpi_quirks &= ~ACPI_Q_BROKEN; 316 if (acpi_quirks & ACPI_Q_BROKEN) { 317 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 318 AcpiTerminate(); 319 return_VALUE (AE_ERROR); 320 } 321 322 return_VALUE (AE_OK); 323 } 324 325 /* 326 * Detect ACPI, perform early initialisation 327 */ 328 static void 329 acpi_identify(driver_t *driver, device_t parent) 330 { 331 device_t child; 332 333 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 334 335 if (!cold) 336 return_VOID; 337 338 /* Check that we haven't been disabled with a hint. */ 339 if (resource_disabled("acpi", 0)) 340 return_VOID; 341 342 /* Make sure we're not being doubly invoked. */ 343 if (device_find_child(parent, "acpi", 0) != NULL) 344 return_VOID; 345 346 /* Initialize ACPI-CA. */ 347 if (ACPI_FAILURE(acpi_Startup())) 348 return_VOID; 349 350 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION); 351 352 /* Attach the actual ACPI device. */ 353 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) { 354 device_printf(parent, "device_identify failed\n"); 355 return_VOID; 356 } 357 } 358 359 /* 360 * Fetch some descriptive data from ACPI to put in our attach message. 361 */ 362 static int 363 acpi_probe(device_t dev) 364 { 365 ACPI_TABLE_HEADER th; 366 char buf[20]; 367 int error; 368 struct sbuf sb; 369 ACPI_STATUS status; 370 371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 372 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 device_printf(dev, "probe failed, other PM system enabled.\n"); 376 return_VALUE (ENXIO); 377 } 378 379 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) { 380 device_printf(dev, "couldn't get XSDT header: %s\n", 381 AcpiFormatException(status)); 382 error = ENXIO; 383 } else { 384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 385 sbuf_bcat(&sb, th.OemId, 6); 386 sbuf_trim(&sb); 387 sbuf_putc(&sb, ' '); 388 sbuf_bcat(&sb, th.OemTableId, 8); 389 sbuf_trim(&sb); 390 sbuf_finish(&sb); 391 device_set_desc_copy(dev, sbuf_data(&sb)); 392 sbuf_delete(&sb); 393 error = 0; 394 } 395 396 return_VALUE (error); 397 } 398 399 static int 400 acpi_attach(device_t dev) 401 { 402 struct acpi_softc *sc; 403 ACPI_STATUS status; 404 int error, state; 405 UINT32 flags; 406 UINT8 TypeA, TypeB; 407 char *env; 408 409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 410 411 sc = device_get_softc(dev); 412 sc->acpi_dev = dev; 413 414 /* Initialize resource manager. */ 415 acpi_rman_io.rm_type = RMAN_ARRAY; 416 acpi_rman_io.rm_start = 0; 417 acpi_rman_io.rm_end = 0xffff; 418 acpi_rman_io.rm_descr = "ACPI I/O ports"; 419 if (rman_init(&acpi_rman_io) != 0) 420 panic("acpi rman_init IO ports failed"); 421 acpi_rman_mem.rm_type = RMAN_ARRAY; 422 acpi_rman_mem.rm_start = 0; 423 acpi_rman_mem.rm_end = ~0ul; 424 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 425 if (rman_init(&acpi_rman_mem) != 0) 426 panic("acpi rman_init memory failed"); 427 428 /* Install the default address space handlers. */ 429 error = ENXIO; 430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 431 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 432 if (ACPI_FAILURE(status)) { 433 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 434 AcpiFormatException(status)); 435 goto out; 436 } 437 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 438 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 439 if (ACPI_FAILURE(status)) { 440 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 441 AcpiFormatException(status)); 442 goto out; 443 } 444 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 445 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 446 if (ACPI_FAILURE(status)) { 447 device_printf(dev, "could not initialise PciConfig handler: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* 453 * Note that some systems (specifically, those with namespace evaluation 454 * issues that require the avoidance of parts of the namespace) must 455 * avoid running _INI and _STA on everything, as well as dodging the final 456 * object init pass. 457 * 458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 459 * 460 * XXX We should arrange for the object init pass after we have attached 461 * all our child devices, but on many systems it works here. 462 */ 463 flags = 0; 464 if (testenv("debug.acpi.avoid")) 465 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 466 467 /* Bring the hardware and basic handlers online. */ 468 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 469 device_printf(dev, "Could not enable ACPI: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 /* 475 * Call the ECDT probe function to provide EC functionality before 476 * the namespace has been evaluated. 477 * 478 * XXX This happens before the sysresource devices have been probed and 479 * attached so its resources come from nexus0. In practice, this isn't 480 * a problem but should be addressed eventually. 481 */ 482 acpi_ec_ecdt_probe(dev); 483 484 /* Bring device objects and regions online. */ 485 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 486 device_printf(dev, "Could not initialize ACPI objects: %s\n", 487 AcpiFormatException(status)); 488 goto out; 489 } 490 491 /* 492 * Setup our sysctl tree. 493 * 494 * XXX: This doesn't check to make sure that none of these fail. 495 */ 496 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 497 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 498 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 499 device_get_name(dev), CTLFLAG_RD, 0, ""); 500 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 501 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 502 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 503 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 504 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 505 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 506 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 507 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 508 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 509 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 510 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 511 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 512 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 513 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 514 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 515 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 516 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 517 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 518 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 519 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 520 "sleep delay"); 521 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 522 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 523 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 524 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 525 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 526 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 527 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 528 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 529 OID_AUTO, "handle_reboot", CTLFLAG_RW, 530 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 531 532 /* 533 * Default to 1 second before sleeping to give some machines time to 534 * stabilize. 535 */ 536 sc->acpi_sleep_delay = 1; 537 if (bootverbose) 538 sc->acpi_verbose = 1; 539 if ((env = getenv("hw.acpi.verbose")) != NULL) { 540 if (strcmp(env, "0") != 0) 541 sc->acpi_verbose = 1; 542 freeenv(env); 543 } 544 545 /* Only enable S4BIOS by default if the FACS says it is available. */ 546 if (AcpiGbl_FACS->S4Bios_f != 0) 547 sc->acpi_s4bios = 1; 548 549 /* 550 * Dispatch the default sleep state to devices. The lid switch is set 551 * to NONE by default to avoid surprising users. 552 */ 553 sc->acpi_power_button_sx = ACPI_STATE_S5; 554 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 555 sc->acpi_standby_sx = ACPI_STATE_S1; 556 sc->acpi_suspend_sx = ACPI_STATE_S3; 557 558 /* Pick the first valid sleep state for the sleep button default. */ 559 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 560 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 561 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 562 sc->acpi_sleep_button_sx = state; 563 break; 564 } 565 566 acpi_enable_fixed_events(sc); 567 568 /* 569 * Scan the namespace and attach/initialise children. 570 */ 571 572 /* Register our shutdown handler. */ 573 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 574 SHUTDOWN_PRI_LAST); 575 576 /* 577 * Register our acpi event handlers. 578 * XXX should be configurable eg. via userland policy manager. 579 */ 580 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 581 sc, ACPI_EVENT_PRI_LAST); 582 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 583 sc, ACPI_EVENT_PRI_LAST); 584 585 /* Flag our initial states. */ 586 sc->acpi_enabled = 1; 587 sc->acpi_sstate = ACPI_STATE_S0; 588 sc->acpi_sleep_disabled = 0; 589 590 /* Create the control device */ 591 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 592 "acpi"); 593 sc->acpi_dev_t->si_drv1 = sc; 594 595 if ((error = acpi_machdep_init(dev))) 596 goto out; 597 598 /* Register ACPI again to pass the correct argument of pm_func. */ 599 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 600 601 if (!acpi_disabled("bus")) 602 acpi_probe_children(dev); 603 604 error = 0; 605 606 out: 607 return_VALUE (error); 608 } 609 610 static int 611 acpi_suspend(device_t dev) 612 { 613 device_t child, *devlist; 614 int error, i, numdevs, pstate; 615 616 GIANT_REQUIRED; 617 618 /* First give child devices a chance to suspend. */ 619 error = bus_generic_suspend(dev); 620 if (error) 621 return (error); 622 623 /* 624 * Now, set them into the appropriate power state, usually D3. If the 625 * device has an _SxD method for the next sleep state, use that power 626 * state instead. 627 */ 628 device_get_children(dev, &devlist, &numdevs); 629 for (i = 0; i < numdevs; i++) { 630 /* If the device is not attached, we've powered it down elsewhere. */ 631 child = devlist[i]; 632 if (!device_is_attached(child)) 633 continue; 634 635 /* 636 * Default to D3 for all sleep states. The _SxD method is optional 637 * so set the powerstate even if it's absent. 638 */ 639 pstate = PCI_POWERSTATE_D3; 640 error = acpi_device_pwr_for_sleep(device_get_parent(child), 641 child, &pstate); 642 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 643 pci_set_powerstate(child, pstate); 644 } 645 free(devlist, M_TEMP); 646 error = 0; 647 648 return (error); 649 } 650 651 static int 652 acpi_resume(device_t dev) 653 { 654 ACPI_HANDLE handle; 655 int i, numdevs; 656 device_t child, *devlist; 657 658 GIANT_REQUIRED; 659 660 /* 661 * Put all devices in D0 before resuming them. Call _S0D on each one 662 * since some systems expect this. 663 */ 664 device_get_children(dev, &devlist, &numdevs); 665 for (i = 0; i < numdevs; i++) { 666 child = devlist[i]; 667 handle = acpi_get_handle(child); 668 if (handle) 669 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 670 if (device_is_attached(child) && acpi_do_powerstate) 671 pci_set_powerstate(child, PCI_POWERSTATE_D0); 672 } 673 free(devlist, M_TEMP); 674 675 return (bus_generic_resume(dev)); 676 } 677 678 static int 679 acpi_shutdown(device_t dev) 680 { 681 682 GIANT_REQUIRED; 683 684 /* Allow children to shutdown first. */ 685 bus_generic_shutdown(dev); 686 687 /* 688 * Enable any GPEs that are able to power-on the system (i.e., RTC). 689 * Also, disable any that are not valid for this state (most). 690 */ 691 acpi_wake_prep_walk(ACPI_STATE_S5); 692 693 return (0); 694 } 695 696 /* 697 * Handle a new device being added 698 */ 699 static device_t 700 acpi_add_child(device_t bus, int order, const char *name, int unit) 701 { 702 struct acpi_device *ad; 703 device_t child; 704 705 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 706 return (NULL); 707 708 resource_list_init(&ad->ad_rl); 709 710 child = device_add_child_ordered(bus, order, name, unit); 711 if (child != NULL) 712 device_set_ivars(child, ad); 713 else 714 free(ad, M_ACPIDEV); 715 return (child); 716 } 717 718 static int 719 acpi_print_child(device_t bus, device_t child) 720 { 721 struct acpi_device *adev = device_get_ivars(child); 722 struct resource_list *rl = &adev->ad_rl; 723 int retval = 0; 724 725 retval += bus_print_child_header(bus, child); 726 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 727 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 728 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 729 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 730 if (device_get_flags(child)) 731 retval += printf(" flags %#x", device_get_flags(child)); 732 retval += bus_print_child_footer(bus, child); 733 734 return (retval); 735 } 736 737 /* 738 * If this device is an ACPI child but no one claimed it, attempt 739 * to power it off. We'll power it back up when a driver is added. 740 * 741 * XXX Disabled for now since many necessary devices (like fdc and 742 * ATA) don't claim the devices we created for them but still expect 743 * them to be powered up. 744 */ 745 static void 746 acpi_probe_nomatch(device_t bus, device_t child) 747 { 748 749 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 750 } 751 752 /* 753 * If a new driver has a chance to probe a child, first power it up. 754 * 755 * XXX Disabled for now (see acpi_probe_nomatch for details). 756 */ 757 static void 758 acpi_driver_added(device_t dev, driver_t *driver) 759 { 760 device_t child, *devlist; 761 int i, numdevs; 762 763 DEVICE_IDENTIFY(driver, dev); 764 device_get_children(dev, &devlist, &numdevs); 765 for (i = 0; i < numdevs; i++) { 766 child = devlist[i]; 767 if (device_get_state(child) == DS_NOTPRESENT) { 768 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 769 if (device_probe_and_attach(child) != 0) 770 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 771 } 772 } 773 free(devlist, M_TEMP); 774 } 775 776 /* Location hint for devctl(8) */ 777 static int 778 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 779 size_t buflen) 780 { 781 struct acpi_device *dinfo = device_get_ivars(child); 782 783 if (dinfo->ad_handle) 784 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 785 else 786 snprintf(buf, buflen, "unknown"); 787 return (0); 788 } 789 790 /* PnP information for devctl(8) */ 791 static int 792 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 793 size_t buflen) 794 { 795 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 796 ACPI_DEVICE_INFO *adinfo; 797 struct acpi_device *dinfo = device_get_ivars(child); 798 char *end; 799 int error; 800 801 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 802 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 803 if (error) 804 snprintf(buf, buflen, "unknown"); 805 else 806 snprintf(buf, buflen, "_HID=%s _UID=%lu", 807 (adinfo->Valid & ACPI_VALID_HID) ? 808 adinfo->HardwareId.Value : "none", 809 (adinfo->Valid & ACPI_VALID_UID) ? 810 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 811 if (adinfo) 812 AcpiOsFree(adinfo); 813 814 return (0); 815 } 816 817 /* 818 * Handle per-device ivars 819 */ 820 static int 821 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 822 { 823 struct acpi_device *ad; 824 825 if ((ad = device_get_ivars(child)) == NULL) { 826 printf("device has no ivars\n"); 827 return (ENOENT); 828 } 829 830 /* ACPI and ISA compatibility ivars */ 831 switch(index) { 832 case ACPI_IVAR_HANDLE: 833 *(ACPI_HANDLE *)result = ad->ad_handle; 834 break; 835 case ACPI_IVAR_MAGIC: 836 *(int *)result = ad->ad_magic; 837 break; 838 case ACPI_IVAR_PRIVATE: 839 *(void **)result = ad->ad_private; 840 break; 841 case ACPI_IVAR_FLAGS: 842 *(int *)result = ad->ad_flags; 843 break; 844 case ISA_IVAR_VENDORID: 845 case ISA_IVAR_SERIAL: 846 case ISA_IVAR_COMPATID: 847 *(int *)result = -1; 848 break; 849 case ISA_IVAR_LOGICALID: 850 *(int *)result = acpi_isa_get_logicalid(child); 851 break; 852 default: 853 return (ENOENT); 854 } 855 856 return (0); 857 } 858 859 static int 860 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 861 { 862 struct acpi_device *ad; 863 864 if ((ad = device_get_ivars(child)) == NULL) { 865 printf("device has no ivars\n"); 866 return (ENOENT); 867 } 868 869 switch(index) { 870 case ACPI_IVAR_HANDLE: 871 ad->ad_handle = (ACPI_HANDLE)value; 872 break; 873 case ACPI_IVAR_MAGIC: 874 ad->ad_magic = (int)value; 875 break; 876 case ACPI_IVAR_PRIVATE: 877 ad->ad_private = (void *)value; 878 break; 879 case ACPI_IVAR_FLAGS: 880 ad->ad_flags = (int)value; 881 break; 882 default: 883 panic("bad ivar write request (%d)", index); 884 return (ENOENT); 885 } 886 887 return (0); 888 } 889 890 /* 891 * Handle child resource allocation/removal 892 */ 893 static struct resource_list * 894 acpi_get_rlist(device_t dev, device_t child) 895 { 896 struct acpi_device *ad; 897 898 ad = device_get_ivars(child); 899 return (&ad->ad_rl); 900 } 901 902 /* 903 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 904 * duplicates, we merge any in the sysresource attach routine. 905 */ 906 static int 907 acpi_sysres_alloc(device_t dev) 908 { 909 struct resource *res; 910 struct resource_list *rl; 911 struct resource_list_entry *rle; 912 struct rman *rm; 913 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 914 device_t *children; 915 int child_count, i; 916 917 /* 918 * Probe/attach any sysresource devices. This would be unnecessary if we 919 * had multi-pass probe/attach. 920 */ 921 if (device_get_children(dev, &children, &child_count) != 0) 922 return (ENXIO); 923 for (i = 0; i < child_count; i++) { 924 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 925 device_probe_and_attach(children[i]); 926 } 927 free(children, M_TEMP); 928 929 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 930 STAILQ_FOREACH(rle, rl, link) { 931 if (rle->res != NULL) { 932 device_printf(dev, "duplicate resource for %lx\n", rle->start); 933 continue; 934 } 935 936 /* Only memory and IO resources are valid here. */ 937 switch (rle->type) { 938 case SYS_RES_IOPORT: 939 rm = &acpi_rman_io; 940 break; 941 case SYS_RES_MEMORY: 942 rm = &acpi_rman_mem; 943 break; 944 default: 945 continue; 946 } 947 948 /* Pre-allocate resource and add to our rman pool. */ 949 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 950 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 951 if (res != NULL) { 952 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 953 rle->res = res; 954 } else 955 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 956 rle->start, rle->count, rle->type); 957 } 958 return (0); 959 } 960 961 /* Find if we manage a given resource. */ 962 static struct resource_list_entry * 963 acpi_sysres_find(device_t dev, int type, u_long addr) 964 { 965 struct resource_list *rl; 966 struct resource_list_entry *rle; 967 968 ACPI_SERIAL_ASSERT(acpi); 969 970 /* We only consider IO and memory resources for our pool. */ 971 rle = NULL; 972 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY) 973 goto out; 974 975 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 976 STAILQ_FOREACH(rle, rl, link) { 977 if (type == rle->type && addr >= rle->start && 978 addr < rle->start + rle->count) 979 break; 980 } 981 982 out: 983 return (rle); 984 } 985 986 static struct resource * 987 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 988 u_long start, u_long end, u_long count, u_int flags) 989 { 990 ACPI_RESOURCE ares; 991 struct acpi_device *ad = device_get_ivars(child); 992 struct resource_list *rl = &ad->ad_rl; 993 struct resource_list_entry *rle; 994 struct resource *res; 995 struct rman *rm; 996 997 res = NULL; 998 ACPI_SERIAL_BEGIN(acpi); 999 1000 /* 1001 * If this is an allocation of the "default" range for a given RID, and 1002 * we know what the resources for this device are (i.e., they're on the 1003 * child's resource list), use those start/end values. 1004 */ 1005 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1006 rle = resource_list_find(rl, type, *rid); 1007 if (rle == NULL) 1008 goto out; 1009 start = rle->start; 1010 end = rle->end; 1011 count = rle->count; 1012 } 1013 1014 /* If we don't manage this address, pass the request up to the parent. */ 1015 rle = acpi_sysres_find(bus, type, start); 1016 if (rle == NULL) { 1017 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1018 start, end, count, flags); 1019 } else { 1020 1021 /* We only handle memory and IO resources through rman. */ 1022 switch (type) { 1023 case SYS_RES_IOPORT: 1024 rm = &acpi_rman_io; 1025 break; 1026 case SYS_RES_MEMORY: 1027 rm = &acpi_rman_mem; 1028 break; 1029 default: 1030 panic("acpi_alloc_resource: invalid res type %d", type); 1031 } 1032 1033 /* If we do know it, allocate it from the local pool. */ 1034 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1035 child); 1036 if (res == NULL) 1037 goto out; 1038 1039 /* Copy the bus tag and handle from the pre-allocated resource. */ 1040 rman_set_rid(res, *rid); 1041 rman_set_bustag(res, rman_get_bustag(rle->res)); 1042 rman_set_bushandle(res, rman_get_start(res)); 1043 1044 /* If requested, activate the resource using the parent's method. */ 1045 if (flags & RF_ACTIVE) 1046 if (bus_activate_resource(child, type, *rid, res) != 0) { 1047 rman_release_resource(res); 1048 res = NULL; 1049 goto out; 1050 } 1051 } 1052 1053 if (res != NULL && device_get_parent(child) == bus) 1054 switch (type) { 1055 case SYS_RES_IRQ: 1056 /* 1057 * Since bus_config_intr() takes immediate effect, we cannot 1058 * configure the interrupt associated with a device when we 1059 * parse the resources but have to defer it until a driver 1060 * actually allocates the interrupt via bus_alloc_resource(). 1061 * 1062 * XXX: Should we handle the lookup failing? 1063 */ 1064 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1065 acpi_config_intr(child, &ares); 1066 break; 1067 } 1068 1069 out: 1070 ACPI_SERIAL_END(acpi); 1071 return (res); 1072 } 1073 1074 static int 1075 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1076 struct resource *r) 1077 { 1078 int ret; 1079 1080 ACPI_SERIAL_BEGIN(acpi); 1081 1082 /* 1083 * If we know about this address, deactivate it and release it to the 1084 * local pool. If we don't, pass this request up to the parent. 1085 */ 1086 if (acpi_sysres_find(bus, type, rman_get_start(r)) != NULL) { 1087 if (rman_get_flags(r) & RF_ACTIVE) { 1088 ret = bus_deactivate_resource(child, type, rid, r); 1089 if (ret != 0) 1090 goto out; 1091 } 1092 ret = rman_release_resource(r); 1093 } else 1094 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1095 1096 out: 1097 ACPI_SERIAL_END(acpi); 1098 return (ret); 1099 } 1100 1101 static void 1102 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1103 { 1104 struct resource_list *rl; 1105 1106 rl = acpi_get_rlist(bus, child); 1107 resource_list_delete(rl, type, rid); 1108 } 1109 1110 /* Allocate an IO port or memory resource, given its GAS. */ 1111 int 1112 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1113 struct resource **res) 1114 { 1115 int error, res_type; 1116 1117 error = ENOMEM; 1118 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1119 return (EINVAL); 1120 1121 /* We only support memory and IO spaces. */ 1122 switch (gas->AddressSpaceId) { 1123 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1124 res_type = SYS_RES_MEMORY; 1125 break; 1126 case ACPI_ADR_SPACE_SYSTEM_IO: 1127 res_type = SYS_RES_IOPORT; 1128 break; 1129 default: 1130 return (EOPNOTSUPP); 1131 } 1132 1133 /* 1134 * If the register width is less than 8, assume the BIOS author means 1135 * it is a bit field and just allocate a byte. 1136 */ 1137 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8) 1138 gas->RegisterBitWidth = 8; 1139 1140 /* Validate the address after we're sure we support the space. */ 1141 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0) 1142 return (EINVAL); 1143 1144 bus_set_resource(dev, res_type, *rid, gas->Address, 1145 gas->RegisterBitWidth / 8); 1146 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE); 1147 if (*res != NULL) { 1148 *type = res_type; 1149 error = 0; 1150 } else 1151 bus_delete_resource(dev, res_type, *rid); 1152 1153 return (error); 1154 } 1155 1156 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1157 static uint32_t 1158 acpi_isa_get_logicalid(device_t dev) 1159 { 1160 ACPI_DEVICE_INFO *devinfo; 1161 ACPI_BUFFER buf; 1162 ACPI_HANDLE h; 1163 ACPI_STATUS error; 1164 u_int32_t pnpid; 1165 1166 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1167 1168 pnpid = 0; 1169 buf.Pointer = NULL; 1170 buf.Length = ACPI_ALLOCATE_BUFFER; 1171 1172 /* Fetch and validate the HID. */ 1173 if ((h = acpi_get_handle(dev)) == NULL) 1174 goto out; 1175 error = AcpiGetObjectInfo(h, &buf); 1176 if (ACPI_FAILURE(error)) 1177 goto out; 1178 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1179 1180 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1181 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1182 1183 out: 1184 if (buf.Pointer != NULL) 1185 AcpiOsFree(buf.Pointer); 1186 return_VALUE (pnpid); 1187 } 1188 1189 static int 1190 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1191 { 1192 ACPI_DEVICE_INFO *devinfo; 1193 ACPI_BUFFER buf; 1194 ACPI_HANDLE h; 1195 ACPI_STATUS error; 1196 uint32_t *pnpid; 1197 int valid, i; 1198 1199 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1200 1201 pnpid = cids; 1202 valid = 0; 1203 buf.Pointer = NULL; 1204 buf.Length = ACPI_ALLOCATE_BUFFER; 1205 1206 /* Fetch and validate the CID */ 1207 if ((h = acpi_get_handle(dev)) == NULL) 1208 goto out; 1209 error = AcpiGetObjectInfo(h, &buf); 1210 if (ACPI_FAILURE(error)) 1211 goto out; 1212 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1213 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1214 goto out; 1215 1216 if (devinfo->CompatibilityId.Count < count) 1217 count = devinfo->CompatibilityId.Count; 1218 for (i = 0; i < count; i++) { 1219 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1220 continue; 1221 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1222 valid++; 1223 } 1224 1225 out: 1226 if (buf.Pointer != NULL) 1227 AcpiOsFree(buf.Pointer); 1228 return_VALUE (valid); 1229 } 1230 1231 static char * 1232 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1233 { 1234 ACPI_HANDLE h; 1235 int i; 1236 1237 h = acpi_get_handle(dev); 1238 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1239 return (NULL); 1240 1241 /* Try to match one of the array of IDs with a HID or CID. */ 1242 for (i = 0; ids[i] != NULL; i++) { 1243 if (acpi_MatchHid(h, ids[i])) 1244 return (ids[i]); 1245 } 1246 return (NULL); 1247 } 1248 1249 static ACPI_STATUS 1250 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1251 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1252 { 1253 ACPI_HANDLE h; 1254 1255 if (dev == NULL) 1256 h = ACPI_ROOT_OBJECT; 1257 else if ((h = acpi_get_handle(dev)) == NULL) 1258 return (AE_BAD_PARAMETER); 1259 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1260 } 1261 1262 static int 1263 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1264 { 1265 struct acpi_softc *sc; 1266 ACPI_HANDLE handle; 1267 ACPI_STATUS status; 1268 char sxd[8]; 1269 int error; 1270 1271 sc = device_get_softc(bus); 1272 handle = acpi_get_handle(dev); 1273 1274 /* 1275 * XXX If we find these devices, don't try to power them down. 1276 * The serial and IRDA ports on my T23 hang the system when 1277 * set to D3 and it appears that such legacy devices may 1278 * need special handling in their drivers. 1279 */ 1280 if (handle == NULL || 1281 acpi_MatchHid(handle, "PNP0500") || 1282 acpi_MatchHid(handle, "PNP0501") || 1283 acpi_MatchHid(handle, "PNP0502") || 1284 acpi_MatchHid(handle, "PNP0510") || 1285 acpi_MatchHid(handle, "PNP0511")) 1286 return (ENXIO); 1287 1288 /* 1289 * Override next state with the value from _SxD, if present. If no 1290 * dstate argument was provided, don't fetch the return value. 1291 */ 1292 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1293 if (dstate) 1294 status = acpi_GetInteger(handle, sxd, dstate); 1295 else 1296 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1297 1298 switch (status) { 1299 case AE_OK: 1300 error = 0; 1301 break; 1302 case AE_NOT_FOUND: 1303 error = ESRCH; 1304 break; 1305 default: 1306 error = ENXIO; 1307 break; 1308 } 1309 1310 return (error); 1311 } 1312 1313 /* Callback arg for our implementation of walking the namespace. */ 1314 struct acpi_device_scan_ctx { 1315 acpi_scan_cb_t user_fn; 1316 void *arg; 1317 ACPI_HANDLE parent; 1318 }; 1319 1320 static ACPI_STATUS 1321 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1322 { 1323 struct acpi_device_scan_ctx *ctx; 1324 device_t dev, old_dev; 1325 ACPI_STATUS status; 1326 ACPI_OBJECT_TYPE type; 1327 1328 /* 1329 * Skip this device if we think we'll have trouble with it or it is 1330 * the parent where the scan began. 1331 */ 1332 ctx = (struct acpi_device_scan_ctx *)arg; 1333 if (acpi_avoid(h) || h == ctx->parent) 1334 return (AE_OK); 1335 1336 /* If this is not a valid device type (e.g., a method), skip it. */ 1337 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1338 return (AE_OK); 1339 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1340 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1341 return (AE_OK); 1342 1343 /* 1344 * Call the user function with the current device. If it is unchanged 1345 * afterwards, return. Otherwise, we update the handle to the new dev. 1346 */ 1347 old_dev = acpi_get_device(h); 1348 dev = old_dev; 1349 status = ctx->user_fn(h, &dev, level, ctx->arg); 1350 if (ACPI_FAILURE(status) || old_dev == dev) 1351 return (status); 1352 1353 /* Remove the old child and its connection to the handle. */ 1354 if (old_dev != NULL) { 1355 device_delete_child(device_get_parent(old_dev), old_dev); 1356 AcpiDetachData(h, acpi_fake_objhandler); 1357 } 1358 1359 /* Recreate the handle association if the user created a device. */ 1360 if (dev != NULL) 1361 AcpiAttachData(h, acpi_fake_objhandler, dev); 1362 1363 return (AE_OK); 1364 } 1365 1366 static ACPI_STATUS 1367 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1368 acpi_scan_cb_t user_fn, void *arg) 1369 { 1370 ACPI_HANDLE h; 1371 struct acpi_device_scan_ctx ctx; 1372 1373 if (acpi_disabled("children")) 1374 return (AE_OK); 1375 1376 if (dev == NULL) 1377 h = ACPI_ROOT_OBJECT; 1378 else if ((h = acpi_get_handle(dev)) == NULL) 1379 return (AE_BAD_PARAMETER); 1380 ctx.user_fn = user_fn; 1381 ctx.arg = arg; 1382 ctx.parent = h; 1383 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1384 acpi_device_scan_cb, &ctx, NULL)); 1385 } 1386 1387 /* 1388 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1389 * device power states since it's close enough to ACPI. 1390 */ 1391 static int 1392 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1393 { 1394 ACPI_HANDLE h; 1395 ACPI_STATUS status; 1396 int error; 1397 1398 error = 0; 1399 h = acpi_get_handle(child); 1400 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1401 return (EINVAL); 1402 if (h == NULL) 1403 return (0); 1404 1405 /* Ignore errors if the power methods aren't present. */ 1406 status = acpi_pwr_switch_consumer(h, state); 1407 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1408 && status != AE_BAD_PARAMETER) 1409 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1410 state, acpi_name(h), AcpiFormatException(status)); 1411 1412 return (error); 1413 } 1414 1415 static int 1416 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1417 { 1418 int result, cid_count, i; 1419 uint32_t lid, cids[8]; 1420 1421 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1422 1423 /* 1424 * ISA-style drivers attached to ACPI may persist and 1425 * probe manually if we return ENOENT. We never want 1426 * that to happen, so don't ever return it. 1427 */ 1428 result = ENXIO; 1429 1430 /* Scan the supplied IDs for a match */ 1431 lid = acpi_isa_get_logicalid(child); 1432 cid_count = acpi_isa_get_compatid(child, cids, 8); 1433 while (ids && ids->ip_id) { 1434 if (lid == ids->ip_id) { 1435 result = 0; 1436 goto out; 1437 } 1438 for (i = 0; i < cid_count; i++) { 1439 if (cids[i] == ids->ip_id) { 1440 result = 0; 1441 goto out; 1442 } 1443 } 1444 ids++; 1445 } 1446 1447 out: 1448 if (result == 0 && ids->ip_desc) 1449 device_set_desc(child, ids->ip_desc); 1450 1451 return_VALUE (result); 1452 } 1453 1454 /* 1455 * Scan all of the ACPI namespace and attach child devices. 1456 * 1457 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1458 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1459 * However, in violation of the spec, some systems place their PCI link 1460 * devices in \, so we have to walk the whole namespace. We check the 1461 * type of namespace nodes, so this should be ok. 1462 */ 1463 static void 1464 acpi_probe_children(device_t bus) 1465 { 1466 1467 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1468 1469 /* 1470 * Scan the namespace and insert placeholders for all the devices that 1471 * we find. We also probe/attach any early devices. 1472 * 1473 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1474 * we want to create nodes for all devices, not just those that are 1475 * currently present. (This assumes that we don't want to create/remove 1476 * devices as they appear, which might be smarter.) 1477 */ 1478 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1479 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1480 bus, NULL); 1481 1482 /* Pre-allocate resources for our rman from any sysresource devices. */ 1483 acpi_sysres_alloc(bus); 1484 1485 /* Create any static children by calling device identify methods. */ 1486 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1487 bus_generic_probe(bus); 1488 1489 /* Probe/attach all children, created staticly and from the namespace. */ 1490 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1491 bus_generic_attach(bus); 1492 1493 /* 1494 * Some of these children may have attached others as part of their attach 1495 * process (eg. the root PCI bus driver), so rescan. 1496 */ 1497 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1498 bus_generic_attach(bus); 1499 1500 /* Attach wake sysctls. */ 1501 acpi_wake_sysctl_walk(bus); 1502 1503 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1504 return_VOID; 1505 } 1506 1507 /* 1508 * Determine the probe order for a given device and return non-zero if it 1509 * should be attached immediately. 1510 */ 1511 static int 1512 acpi_probe_order(ACPI_HANDLE handle, int *order) 1513 { 1514 1515 /* 1516 * 1. I/O port and memory system resource holders 1517 * 2. Embedded controllers (to handle early accesses) 1518 * 3. PCI Link Devices 1519 */ 1520 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1521 *order = 1; 1522 else if (acpi_MatchHid(handle, "PNP0C09")) 1523 *order = 2; 1524 else if (acpi_MatchHid(handle, "PNP0C0F")) 1525 *order = 3; 1526 return (0); 1527 } 1528 1529 /* 1530 * Evaluate a child device and determine whether we might attach a device to 1531 * it. 1532 */ 1533 static ACPI_STATUS 1534 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1535 { 1536 ACPI_OBJECT_TYPE type; 1537 ACPI_HANDLE h; 1538 device_t bus, child; 1539 int order; 1540 char *handle_str, **search; 1541 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1542 1543 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1544 1545 /* Skip this device if we think we'll have trouble with it. */ 1546 if (acpi_avoid(handle)) 1547 return_ACPI_STATUS (AE_OK); 1548 1549 bus = (device_t)context; 1550 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1551 switch (type) { 1552 case ACPI_TYPE_DEVICE: 1553 case ACPI_TYPE_PROCESSOR: 1554 case ACPI_TYPE_THERMAL: 1555 case ACPI_TYPE_POWER: 1556 if (acpi_disabled("children")) 1557 break; 1558 1559 /* 1560 * Since we scan from \, be sure to skip system scope objects. 1561 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1562 */ 1563 handle_str = acpi_name(handle); 1564 for (search = scopes; *search != NULL; search++) { 1565 if (strcmp(handle_str, *search) == 0) 1566 break; 1567 } 1568 if (*search != NULL) 1569 break; 1570 1571 /* 1572 * Create a placeholder device for this node. Sort the placeholder 1573 * so that the probe/attach passes will run breadth-first. Orders 1574 * less than 10 are reserved for special objects (i.e., system 1575 * resources). Larger values are used for all other devices. 1576 */ 1577 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1578 order = (level + 1) * 10; 1579 acpi_probe_order(handle, &order); 1580 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1581 if (child == NULL) 1582 break; 1583 1584 /* Associate the handle with the device_t and vice versa. */ 1585 acpi_set_handle(child, handle); 1586 AcpiAttachData(handle, acpi_fake_objhandler, child); 1587 1588 /* 1589 * Check that the device is present. If it's not present, 1590 * leave it disabled (so that we have a device_t attached to 1591 * the handle, but we don't probe it). 1592 * 1593 * XXX PCI link devices sometimes report "present" but not 1594 * "functional" (i.e. if disabled). Go ahead and probe them 1595 * anyway since we may enable them later. 1596 */ 1597 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1598 /* Never disable PCI link devices. */ 1599 if (acpi_MatchHid(handle, "PNP0C0F")) 1600 break; 1601 /* 1602 * Docking stations should remain enabled since the system 1603 * may be undocked at boot. 1604 */ 1605 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1606 break; 1607 1608 device_disable(child); 1609 break; 1610 } 1611 1612 /* 1613 * Get the device's resource settings and attach them. 1614 * Note that if the device has _PRS but no _CRS, we need 1615 * to decide when it's appropriate to try to configure the 1616 * device. Ignore the return value here; it's OK for the 1617 * device not to have any resources. 1618 */ 1619 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1620 break; 1621 } 1622 } 1623 1624 return_ACPI_STATUS (AE_OK); 1625 } 1626 1627 /* 1628 * AcpiAttachData() requires an object handler but never uses it. This is a 1629 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1630 */ 1631 void 1632 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1633 { 1634 } 1635 1636 static void 1637 acpi_shutdown_final(void *arg, int howto) 1638 { 1639 struct acpi_softc *sc; 1640 ACPI_STATUS status; 1641 1642 /* 1643 * XXX Shutdown code should only run on the BSP (cpuid 0). 1644 * Some chipsets do not power off the system correctly if called from 1645 * an AP. 1646 */ 1647 sc = arg; 1648 if ((howto & RB_POWEROFF) != 0) { 1649 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1650 if (ACPI_FAILURE(status)) { 1651 printf("AcpiEnterSleepStatePrep failed - %s\n", 1652 AcpiFormatException(status)); 1653 return; 1654 } 1655 printf("Powering system off using ACPI\n"); 1656 ACPI_DISABLE_IRQS(); 1657 status = AcpiEnterSleepState(ACPI_STATE_S5); 1658 if (ACPI_FAILURE(status)) { 1659 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1660 } else { 1661 DELAY(1000000); 1662 printf("ACPI power-off failed - timeout\n"); 1663 } 1664 } else if ((howto & RB_HALT) == 0 && AcpiGbl_FADT->ResetRegSup && 1665 sc->acpi_handle_reboot) { 1666 /* Reboot using the reset register. */ 1667 status = AcpiHwLowLevelWrite( 1668 AcpiGbl_FADT->ResetRegister.RegisterBitWidth, 1669 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister); 1670 if (ACPI_FAILURE(status)) { 1671 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1672 } else { 1673 DELAY(1000000); 1674 printf("ACPI reset failed - timeout\n"); 1675 } 1676 } else if (sc->acpi_do_disable && panicstr == NULL) { 1677 /* 1678 * Only disable ACPI if the user requested. On some systems, writing 1679 * the disable value to SMI_CMD hangs the system. 1680 */ 1681 printf("Shutting down ACPI\n"); 1682 AcpiTerminate(); 1683 } 1684 } 1685 1686 static void 1687 acpi_enable_fixed_events(struct acpi_softc *sc) 1688 { 1689 static int first_time = 1; 1690 1691 /* Enable and clear fixed events and install handlers. */ 1692 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) { 1693 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1694 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1695 acpi_event_power_button_sleep, sc); 1696 if (first_time) 1697 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1698 } 1699 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) { 1700 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1701 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1702 acpi_event_sleep_button_sleep, sc); 1703 if (first_time) 1704 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1705 } 1706 1707 first_time = 0; 1708 } 1709 1710 /* 1711 * Returns true if the device is actually present and should 1712 * be attached to. This requires the present, enabled, UI-visible 1713 * and diagnostics-passed bits to be set. 1714 */ 1715 BOOLEAN 1716 acpi_DeviceIsPresent(device_t dev) 1717 { 1718 ACPI_DEVICE_INFO *devinfo; 1719 ACPI_HANDLE h; 1720 ACPI_BUFFER buf; 1721 ACPI_STATUS error; 1722 int ret; 1723 1724 ret = FALSE; 1725 if ((h = acpi_get_handle(dev)) == NULL) 1726 return (FALSE); 1727 buf.Pointer = NULL; 1728 buf.Length = ACPI_ALLOCATE_BUFFER; 1729 error = AcpiGetObjectInfo(h, &buf); 1730 if (ACPI_FAILURE(error)) 1731 return (FALSE); 1732 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1733 1734 /* If no _STA method, must be present */ 1735 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1736 ret = TRUE; 1737 1738 /* Return true for 'present' and 'functioning' */ 1739 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1740 ret = TRUE; 1741 1742 AcpiOsFree(buf.Pointer); 1743 return (ret); 1744 } 1745 1746 /* 1747 * Returns true if the battery is actually present and inserted. 1748 */ 1749 BOOLEAN 1750 acpi_BatteryIsPresent(device_t dev) 1751 { 1752 ACPI_DEVICE_INFO *devinfo; 1753 ACPI_HANDLE h; 1754 ACPI_BUFFER buf; 1755 ACPI_STATUS error; 1756 int ret; 1757 1758 ret = FALSE; 1759 if ((h = acpi_get_handle(dev)) == NULL) 1760 return (FALSE); 1761 buf.Pointer = NULL; 1762 buf.Length = ACPI_ALLOCATE_BUFFER; 1763 error = AcpiGetObjectInfo(h, &buf); 1764 if (ACPI_FAILURE(error)) 1765 return (FALSE); 1766 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1767 1768 /* If no _STA method, must be present */ 1769 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1770 ret = TRUE; 1771 1772 /* Return true for 'present', 'battery present', and 'functioning' */ 1773 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1774 ret = TRUE; 1775 1776 AcpiOsFree(buf.Pointer); 1777 return (ret); 1778 } 1779 1780 /* 1781 * Match a HID string against a handle 1782 */ 1783 static BOOLEAN 1784 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1785 { 1786 ACPI_DEVICE_INFO *devinfo; 1787 ACPI_BUFFER buf; 1788 ACPI_STATUS error; 1789 int ret, i; 1790 1791 ret = FALSE; 1792 if (hid == NULL || h == NULL) 1793 return (ret); 1794 buf.Pointer = NULL; 1795 buf.Length = ACPI_ALLOCATE_BUFFER; 1796 error = AcpiGetObjectInfo(h, &buf); 1797 if (ACPI_FAILURE(error)) 1798 return (ret); 1799 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1800 1801 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1802 strcmp(hid, devinfo->HardwareId.Value) == 0) 1803 ret = TRUE; 1804 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1805 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1806 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1807 ret = TRUE; 1808 break; 1809 } 1810 } 1811 } 1812 1813 AcpiOsFree(buf.Pointer); 1814 return (ret); 1815 } 1816 1817 /* 1818 * Return the handle of a named object within our scope, ie. that of (parent) 1819 * or one if its parents. 1820 */ 1821 ACPI_STATUS 1822 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1823 { 1824 ACPI_HANDLE r; 1825 ACPI_STATUS status; 1826 1827 /* Walk back up the tree to the root */ 1828 for (;;) { 1829 status = AcpiGetHandle(parent, path, &r); 1830 if (ACPI_SUCCESS(status)) { 1831 *result = r; 1832 return (AE_OK); 1833 } 1834 /* XXX Return error here? */ 1835 if (status != AE_NOT_FOUND) 1836 return (AE_OK); 1837 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1838 return (AE_NOT_FOUND); 1839 parent = r; 1840 } 1841 } 1842 1843 /* Find the difference between two PM tick counts. */ 1844 uint32_t 1845 acpi_TimerDelta(uint32_t end, uint32_t start) 1846 { 1847 uint32_t delta; 1848 1849 if (end >= start) 1850 delta = end - start; 1851 else if (AcpiGbl_FADT->TmrValExt == 0) 1852 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1853 else 1854 delta = ((0xFFFFFFFF - start) + end + 1); 1855 return (delta); 1856 } 1857 1858 /* 1859 * Allocate a buffer with a preset data size. 1860 */ 1861 ACPI_BUFFER * 1862 acpi_AllocBuffer(int size) 1863 { 1864 ACPI_BUFFER *buf; 1865 1866 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1867 return (NULL); 1868 buf->Length = size; 1869 buf->Pointer = (void *)(buf + 1); 1870 return (buf); 1871 } 1872 1873 ACPI_STATUS 1874 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1875 { 1876 ACPI_OBJECT arg1; 1877 ACPI_OBJECT_LIST args; 1878 1879 arg1.Type = ACPI_TYPE_INTEGER; 1880 arg1.Integer.Value = number; 1881 args.Count = 1; 1882 args.Pointer = &arg1; 1883 1884 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1885 } 1886 1887 /* 1888 * Evaluate a path that should return an integer. 1889 */ 1890 ACPI_STATUS 1891 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1892 { 1893 ACPI_STATUS status; 1894 ACPI_BUFFER buf; 1895 ACPI_OBJECT param; 1896 1897 if (handle == NULL) 1898 handle = ACPI_ROOT_OBJECT; 1899 1900 /* 1901 * Assume that what we've been pointed at is an Integer object, or 1902 * a method that will return an Integer. 1903 */ 1904 buf.Pointer = ¶m; 1905 buf.Length = sizeof(param); 1906 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1907 if (ACPI_SUCCESS(status)) { 1908 if (param.Type == ACPI_TYPE_INTEGER) 1909 *number = param.Integer.Value; 1910 else 1911 status = AE_TYPE; 1912 } 1913 1914 /* 1915 * In some applications, a method that's expected to return an Integer 1916 * may instead return a Buffer (probably to simplify some internal 1917 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1918 * convert it into an Integer as best we can. 1919 * 1920 * This is a hack. 1921 */ 1922 if (status == AE_BUFFER_OVERFLOW) { 1923 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1924 status = AE_NO_MEMORY; 1925 } else { 1926 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1927 if (ACPI_SUCCESS(status)) 1928 status = acpi_ConvertBufferToInteger(&buf, number); 1929 AcpiOsFree(buf.Pointer); 1930 } 1931 } 1932 return (status); 1933 } 1934 1935 ACPI_STATUS 1936 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1937 { 1938 ACPI_OBJECT *p; 1939 UINT8 *val; 1940 int i; 1941 1942 p = (ACPI_OBJECT *)bufp->Pointer; 1943 if (p->Type == ACPI_TYPE_INTEGER) { 1944 *number = p->Integer.Value; 1945 return (AE_OK); 1946 } 1947 if (p->Type != ACPI_TYPE_BUFFER) 1948 return (AE_TYPE); 1949 if (p->Buffer.Length > sizeof(int)) 1950 return (AE_BAD_DATA); 1951 1952 *number = 0; 1953 val = p->Buffer.Pointer; 1954 for (i = 0; i < p->Buffer.Length; i++) 1955 *number += val[i] << (i * 8); 1956 return (AE_OK); 1957 } 1958 1959 /* 1960 * Iterate over the elements of an a package object, calling the supplied 1961 * function for each element. 1962 * 1963 * XXX possible enhancement might be to abort traversal on error. 1964 */ 1965 ACPI_STATUS 1966 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1967 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1968 { 1969 ACPI_OBJECT *comp; 1970 int i; 1971 1972 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1973 return (AE_BAD_PARAMETER); 1974 1975 /* Iterate over components */ 1976 i = 0; 1977 comp = pkg->Package.Elements; 1978 for (; i < pkg->Package.Count; i++, comp++) 1979 func(comp, arg); 1980 1981 return (AE_OK); 1982 } 1983 1984 /* 1985 * Find the (index)th resource object in a set. 1986 */ 1987 ACPI_STATUS 1988 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 1989 { 1990 ACPI_RESOURCE *rp; 1991 int i; 1992 1993 rp = (ACPI_RESOURCE *)buf->Pointer; 1994 i = index; 1995 while (i-- > 0) { 1996 /* Range check */ 1997 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 1998 return (AE_BAD_PARAMETER); 1999 2000 /* Check for terminator */ 2001 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2002 return (AE_NOT_FOUND); 2003 rp = ACPI_NEXT_RESOURCE(rp); 2004 } 2005 if (resp != NULL) 2006 *resp = rp; 2007 2008 return (AE_OK); 2009 } 2010 2011 /* 2012 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2013 * 2014 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2015 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2016 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2017 * resources. 2018 */ 2019 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2020 2021 ACPI_STATUS 2022 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2023 { 2024 ACPI_RESOURCE *rp; 2025 void *newp; 2026 2027 /* Initialise the buffer if necessary. */ 2028 if (buf->Pointer == NULL) { 2029 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2030 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2031 return (AE_NO_MEMORY); 2032 rp = (ACPI_RESOURCE *)buf->Pointer; 2033 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2034 rp->Length = 0; 2035 } 2036 if (res == NULL) 2037 return (AE_OK); 2038 2039 /* 2040 * Scan the current buffer looking for the terminator. 2041 * This will either find the terminator or hit the end 2042 * of the buffer and return an error. 2043 */ 2044 rp = (ACPI_RESOURCE *)buf->Pointer; 2045 for (;;) { 2046 /* Range check, don't go outside the buffer */ 2047 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2048 return (AE_BAD_PARAMETER); 2049 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2050 break; 2051 rp = ACPI_NEXT_RESOURCE(rp); 2052 } 2053 2054 /* 2055 * Check the size of the buffer and expand if required. 2056 * 2057 * Required size is: 2058 * size of existing resources before terminator + 2059 * size of new resource and header + 2060 * size of terminator. 2061 * 2062 * Note that this loop should really only run once, unless 2063 * for some reason we are stuffing a *really* huge resource. 2064 */ 2065 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2066 res->Length + ACPI_RS_SIZE_NO_DATA + 2067 ACPI_RS_SIZE_MIN) >= buf->Length) { 2068 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2069 return (AE_NO_MEMORY); 2070 bcopy(buf->Pointer, newp, buf->Length); 2071 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2072 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2073 AcpiOsFree(buf->Pointer); 2074 buf->Pointer = newp; 2075 buf->Length += buf->Length; 2076 } 2077 2078 /* Insert the new resource. */ 2079 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2080 2081 /* And add the terminator. */ 2082 rp = ACPI_NEXT_RESOURCE(rp); 2083 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2084 rp->Length = 0; 2085 2086 return (AE_OK); 2087 } 2088 2089 /* 2090 * Set interrupt model. 2091 */ 2092 ACPI_STATUS 2093 acpi_SetIntrModel(int model) 2094 { 2095 2096 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2097 } 2098 2099 static void 2100 acpi_sleep_enable(void *arg) 2101 { 2102 2103 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2104 } 2105 2106 enum acpi_sleep_state { 2107 ACPI_SS_NONE, 2108 ACPI_SS_GPE_SET, 2109 ACPI_SS_DEV_SUSPEND, 2110 ACPI_SS_SLP_PREP, 2111 ACPI_SS_SLEPT, 2112 }; 2113 2114 /* 2115 * Set the system sleep state 2116 * 2117 * Currently we support S1-S5 but S4 is only S4BIOS 2118 */ 2119 ACPI_STATUS 2120 acpi_SetSleepState(struct acpi_softc *sc, int state) 2121 { 2122 ACPI_STATUS status; 2123 UINT8 TypeA; 2124 UINT8 TypeB; 2125 enum acpi_sleep_state slp_state; 2126 2127 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2128 2129 status = AE_OK; 2130 ACPI_LOCK(acpi); 2131 if (sc->acpi_sleep_disabled) { 2132 if (sc->acpi_sstate != ACPI_STATE_S0) 2133 status = AE_ERROR; 2134 ACPI_UNLOCK(acpi); 2135 printf("acpi: suspend request ignored (not ready yet)\n"); 2136 return (status); 2137 } 2138 sc->acpi_sleep_disabled = 1; 2139 ACPI_UNLOCK(acpi); 2140 2141 /* 2142 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2143 * drivers need this. 2144 */ 2145 mtx_lock(&Giant); 2146 slp_state = ACPI_SS_NONE; 2147 switch (state) { 2148 case ACPI_STATE_S1: 2149 case ACPI_STATE_S2: 2150 case ACPI_STATE_S3: 2151 case ACPI_STATE_S4: 2152 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2153 if (status == AE_NOT_FOUND) { 2154 device_printf(sc->acpi_dev, 2155 "Sleep state S%d not supported by BIOS\n", state); 2156 break; 2157 } else if (ACPI_FAILURE(status)) { 2158 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2159 AcpiFormatException(status)); 2160 break; 2161 } 2162 2163 sc->acpi_sstate = state; 2164 2165 /* Enable any GPEs as appropriate and requested by the user. */ 2166 acpi_wake_prep_walk(state); 2167 slp_state = ACPI_SS_GPE_SET; 2168 2169 /* 2170 * Inform all devices that we are going to sleep. If at least one 2171 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2172 * 2173 * XXX Note that a better two-pass approach with a 'veto' pass 2174 * followed by a "real thing" pass would be better, but the current 2175 * bus interface does not provide for this. 2176 */ 2177 if (DEVICE_SUSPEND(root_bus) != 0) { 2178 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2179 break; 2180 } 2181 slp_state = ACPI_SS_DEV_SUSPEND; 2182 2183 status = AcpiEnterSleepStatePrep(state); 2184 if (ACPI_FAILURE(status)) { 2185 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2186 AcpiFormatException(status)); 2187 break; 2188 } 2189 slp_state = ACPI_SS_SLP_PREP; 2190 2191 if (sc->acpi_sleep_delay > 0) 2192 DELAY(sc->acpi_sleep_delay * 1000000); 2193 2194 if (state != ACPI_STATE_S1) { 2195 acpi_sleep_machdep(sc, state); 2196 2197 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2198 if (state == ACPI_STATE_S4) 2199 AcpiEnable(); 2200 } else { 2201 ACPI_DISABLE_IRQS(); 2202 status = AcpiEnterSleepState(state); 2203 if (ACPI_FAILURE(status)) { 2204 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2205 AcpiFormatException(status)); 2206 break; 2207 } 2208 } 2209 slp_state = ACPI_SS_SLEPT; 2210 break; 2211 case ACPI_STATE_S5: 2212 /* 2213 * Shut down cleanly and power off. This will call us back through the 2214 * shutdown handlers. 2215 */ 2216 shutdown_nice(RB_POWEROFF); 2217 break; 2218 case ACPI_STATE_S0: 2219 default: 2220 status = AE_BAD_PARAMETER; 2221 break; 2222 } 2223 2224 /* 2225 * Back out state according to how far along we got in the suspend 2226 * process. This handles both the error and success cases. 2227 */ 2228 if (slp_state >= ACPI_SS_GPE_SET) { 2229 acpi_wake_prep_walk(state); 2230 sc->acpi_sstate = ACPI_STATE_S0; 2231 } 2232 if (slp_state >= ACPI_SS_SLP_PREP) 2233 AcpiLeaveSleepState(state); 2234 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2235 DEVICE_RESUME(root_bus); 2236 if (slp_state >= ACPI_SS_SLEPT) 2237 acpi_enable_fixed_events(sc); 2238 2239 /* Allow another sleep request after a while. */ 2240 if (state != ACPI_STATE_S5) 2241 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2242 2243 mtx_unlock(&Giant); 2244 return_ACPI_STATUS (status); 2245 } 2246 2247 /* Initialize a device's wake GPE. */ 2248 int 2249 acpi_wake_init(device_t dev, int type) 2250 { 2251 struct acpi_prw_data prw; 2252 2253 /* Evaluate _PRW to find the GPE. */ 2254 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2255 return (ENXIO); 2256 2257 /* Set the requested type for the GPE (runtime, wake, or both). */ 2258 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2259 device_printf(dev, "set GPE type failed\n"); 2260 return (ENXIO); 2261 } 2262 2263 return (0); 2264 } 2265 2266 /* Enable or disable the device's wake GPE. */ 2267 int 2268 acpi_wake_set_enable(device_t dev, int enable) 2269 { 2270 struct acpi_prw_data prw; 2271 ACPI_HANDLE handle; 2272 ACPI_STATUS status; 2273 int flags; 2274 2275 /* Make sure the device supports waking the system and get the GPE. */ 2276 handle = acpi_get_handle(dev); 2277 if (acpi_parse_prw(handle, &prw) != 0) 2278 return (ENXIO); 2279 2280 flags = acpi_get_flags(dev); 2281 if (enable) { 2282 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2283 if (ACPI_FAILURE(status)) { 2284 device_printf(dev, "enable wake failed\n"); 2285 return (ENXIO); 2286 } 2287 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2288 } else { 2289 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2290 if (ACPI_FAILURE(status)) { 2291 device_printf(dev, "disable wake failed\n"); 2292 return (ENXIO); 2293 } 2294 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2295 } 2296 2297 return (0); 2298 } 2299 2300 static int 2301 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2302 { 2303 struct acpi_prw_data prw; 2304 device_t dev; 2305 2306 /* Check that this is a wake-capable device and get its GPE. */ 2307 if (acpi_parse_prw(handle, &prw) != 0) 2308 return (ENXIO); 2309 dev = acpi_get_device(handle); 2310 2311 /* 2312 * The destination sleep state must be less than (i.e., higher power) 2313 * or equal to the value specified by _PRW. If this GPE cannot be 2314 * enabled for the next sleep state, then disable it. If it can and 2315 * the user requested it be enabled, turn on any required power resources 2316 * and set _PSW. 2317 */ 2318 if (sstate > prw.lowest_wake) { 2319 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2320 if (bootverbose) 2321 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2322 acpi_name(handle), sstate); 2323 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2324 acpi_pwr_wake_enable(handle, 1); 2325 acpi_SetInteger(handle, "_PSW", 1); 2326 if (bootverbose) 2327 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2328 acpi_name(handle), sstate); 2329 } 2330 2331 return (0); 2332 } 2333 2334 static int 2335 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2336 { 2337 struct acpi_prw_data prw; 2338 device_t dev; 2339 2340 /* 2341 * Check that this is a wake-capable device and get its GPE. Return 2342 * now if the user didn't enable this device for wake. 2343 */ 2344 if (acpi_parse_prw(handle, &prw) != 0) 2345 return (ENXIO); 2346 dev = acpi_get_device(handle); 2347 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2348 return (0); 2349 2350 /* 2351 * If this GPE couldn't be enabled for the previous sleep state, it was 2352 * disabled before going to sleep so re-enable it. If it was enabled, 2353 * clear _PSW and turn off any power resources it used. 2354 */ 2355 if (sstate > prw.lowest_wake) { 2356 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2357 if (bootverbose) 2358 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2359 } else { 2360 acpi_SetInteger(handle, "_PSW", 0); 2361 acpi_pwr_wake_enable(handle, 0); 2362 if (bootverbose) 2363 device_printf(dev, "run_prep cleaned up for %s\n", 2364 acpi_name(handle)); 2365 } 2366 2367 return (0); 2368 } 2369 2370 static ACPI_STATUS 2371 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2372 { 2373 int sstate; 2374 2375 /* If suspending, run the sleep prep function, otherwise wake. */ 2376 sstate = *(int *)context; 2377 if (AcpiGbl_SystemAwakeAndRunning) 2378 acpi_wake_sleep_prep(handle, sstate); 2379 else 2380 acpi_wake_run_prep(handle, sstate); 2381 return (AE_OK); 2382 } 2383 2384 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2385 static int 2386 acpi_wake_prep_walk(int sstate) 2387 { 2388 ACPI_HANDLE sb_handle; 2389 2390 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2391 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2392 acpi_wake_prep, &sstate, NULL); 2393 return (0); 2394 } 2395 2396 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2397 static int 2398 acpi_wake_sysctl_walk(device_t dev) 2399 { 2400 int error, i, numdevs; 2401 device_t *devlist; 2402 device_t child; 2403 ACPI_STATUS status; 2404 2405 error = device_get_children(dev, &devlist, &numdevs); 2406 if (error != 0 || numdevs == 0) { 2407 if (numdevs == 0) 2408 free(devlist, M_TEMP); 2409 return (error); 2410 } 2411 for (i = 0; i < numdevs; i++) { 2412 child = devlist[i]; 2413 acpi_wake_sysctl_walk(child); 2414 if (!device_is_attached(child)) 2415 continue; 2416 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2417 if (ACPI_SUCCESS(status)) { 2418 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2419 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2420 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2421 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2422 } 2423 } 2424 free(devlist, M_TEMP); 2425 2426 return (0); 2427 } 2428 2429 /* Enable or disable wake from userland. */ 2430 static int 2431 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2432 { 2433 int enable, error; 2434 device_t dev; 2435 2436 dev = (device_t)arg1; 2437 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2438 2439 error = sysctl_handle_int(oidp, &enable, 0, req); 2440 if (error != 0 || req->newptr == NULL) 2441 return (error); 2442 if (enable != 0 && enable != 1) 2443 return (EINVAL); 2444 2445 return (acpi_wake_set_enable(dev, enable)); 2446 } 2447 2448 /* Parse a device's _PRW into a structure. */ 2449 int 2450 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2451 { 2452 ACPI_STATUS status; 2453 ACPI_BUFFER prw_buffer; 2454 ACPI_OBJECT *res, *res2; 2455 int error, i, power_count; 2456 2457 if (h == NULL || prw == NULL) 2458 return (EINVAL); 2459 2460 /* 2461 * The _PRW object (7.2.9) is only required for devices that have the 2462 * ability to wake the system from a sleeping state. 2463 */ 2464 error = EINVAL; 2465 prw_buffer.Pointer = NULL; 2466 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2467 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2468 if (ACPI_FAILURE(status)) 2469 return (ENOENT); 2470 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2471 if (res == NULL) 2472 return (ENOENT); 2473 if (!ACPI_PKG_VALID(res, 2)) 2474 goto out; 2475 2476 /* 2477 * Element 1 of the _PRW object: 2478 * The lowest power system sleeping state that can be entered while still 2479 * providing wake functionality. The sleeping state being entered must 2480 * be less than (i.e., higher power) or equal to this value. 2481 */ 2482 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2483 goto out; 2484 2485 /* 2486 * Element 0 of the _PRW object: 2487 */ 2488 switch (res->Package.Elements[0].Type) { 2489 case ACPI_TYPE_INTEGER: 2490 /* 2491 * If the data type of this package element is numeric, then this 2492 * _PRW package element is the bit index in the GPEx_EN, in the 2493 * GPE blocks described in the FADT, of the enable bit that is 2494 * enabled for the wake event. 2495 */ 2496 prw->gpe_handle = NULL; 2497 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2498 error = 0; 2499 break; 2500 case ACPI_TYPE_PACKAGE: 2501 /* 2502 * If the data type of this package element is a package, then this 2503 * _PRW package element is itself a package containing two 2504 * elements. The first is an object reference to the GPE Block 2505 * device that contains the GPE that will be triggered by the wake 2506 * event. The second element is numeric and it contains the bit 2507 * index in the GPEx_EN, in the GPE Block referenced by the 2508 * first element in the package, of the enable bit that is enabled for 2509 * the wake event. 2510 * 2511 * For example, if this field is a package then it is of the form: 2512 * Package() {\_SB.PCI0.ISA.GPE, 2} 2513 */ 2514 res2 = &res->Package.Elements[0]; 2515 if (!ACPI_PKG_VALID(res2, 2)) 2516 goto out; 2517 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2518 if (prw->gpe_handle == NULL) 2519 goto out; 2520 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2521 goto out; 2522 error = 0; 2523 break; 2524 default: 2525 goto out; 2526 } 2527 2528 /* Elements 2 to N of the _PRW object are power resources. */ 2529 power_count = res->Package.Count - 2; 2530 if (power_count > ACPI_PRW_MAX_POWERRES) { 2531 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2532 power_count = 0; 2533 } 2534 prw->power_res_count = power_count; 2535 for (i = 0; i < power_count; i++) 2536 prw->power_res[i] = res->Package.Elements[i]; 2537 2538 out: 2539 if (prw_buffer.Pointer != NULL) 2540 AcpiOsFree(prw_buffer.Pointer); 2541 return (error); 2542 } 2543 2544 /* 2545 * ACPI Event Handlers 2546 */ 2547 2548 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2549 2550 static void 2551 acpi_system_eventhandler_sleep(void *arg, int state) 2552 { 2553 2554 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2555 2556 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2557 acpi_SetSleepState((struct acpi_softc *)arg, state); 2558 2559 return_VOID; 2560 } 2561 2562 static void 2563 acpi_system_eventhandler_wakeup(void *arg, int state) 2564 { 2565 2566 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2567 2568 /* Currently, nothing to do for wakeup. */ 2569 2570 return_VOID; 2571 } 2572 2573 /* 2574 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2575 */ 2576 UINT32 2577 acpi_event_power_button_sleep(void *context) 2578 { 2579 struct acpi_softc *sc = (struct acpi_softc *)context; 2580 2581 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2582 2583 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2584 2585 return_VALUE (ACPI_INTERRUPT_HANDLED); 2586 } 2587 2588 UINT32 2589 acpi_event_power_button_wake(void *context) 2590 { 2591 struct acpi_softc *sc = (struct acpi_softc *)context; 2592 2593 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2594 2595 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2596 2597 return_VALUE (ACPI_INTERRUPT_HANDLED); 2598 } 2599 2600 UINT32 2601 acpi_event_sleep_button_sleep(void *context) 2602 { 2603 struct acpi_softc *sc = (struct acpi_softc *)context; 2604 2605 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2606 2607 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2608 2609 return_VALUE (ACPI_INTERRUPT_HANDLED); 2610 } 2611 2612 UINT32 2613 acpi_event_sleep_button_wake(void *context) 2614 { 2615 struct acpi_softc *sc = (struct acpi_softc *)context; 2616 2617 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2618 2619 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2620 2621 return_VALUE (ACPI_INTERRUPT_HANDLED); 2622 } 2623 2624 /* 2625 * XXX This static buffer is suboptimal. There is no locking so only 2626 * use this for single-threaded callers. 2627 */ 2628 char * 2629 acpi_name(ACPI_HANDLE handle) 2630 { 2631 ACPI_BUFFER buf; 2632 static char data[256]; 2633 2634 buf.Length = sizeof(data); 2635 buf.Pointer = data; 2636 2637 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2638 return (data); 2639 return ("(unknown)"); 2640 } 2641 2642 /* 2643 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2644 * parts of the namespace. 2645 */ 2646 int 2647 acpi_avoid(ACPI_HANDLE handle) 2648 { 2649 char *cp, *env, *np; 2650 int len; 2651 2652 np = acpi_name(handle); 2653 if (*np == '\\') 2654 np++; 2655 if ((env = getenv("debug.acpi.avoid")) == NULL) 2656 return (0); 2657 2658 /* Scan the avoid list checking for a match */ 2659 cp = env; 2660 for (;;) { 2661 while (*cp != 0 && isspace(*cp)) 2662 cp++; 2663 if (*cp == 0) 2664 break; 2665 len = 0; 2666 while (cp[len] != 0 && !isspace(cp[len])) 2667 len++; 2668 if (!strncmp(cp, np, len)) { 2669 freeenv(env); 2670 return(1); 2671 } 2672 cp += len; 2673 } 2674 freeenv(env); 2675 2676 return (0); 2677 } 2678 2679 /* 2680 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2681 */ 2682 int 2683 acpi_disabled(char *subsys) 2684 { 2685 char *cp, *env; 2686 int len; 2687 2688 if ((env = getenv("debug.acpi.disabled")) == NULL) 2689 return (0); 2690 if (strcmp(env, "all") == 0) { 2691 freeenv(env); 2692 return (1); 2693 } 2694 2695 /* Scan the disable list, checking for a match. */ 2696 cp = env; 2697 for (;;) { 2698 while (*cp != '\0' && isspace(*cp)) 2699 cp++; 2700 if (*cp == '\0') 2701 break; 2702 len = 0; 2703 while (cp[len] != '\0' && !isspace(cp[len])) 2704 len++; 2705 if (strncmp(cp, subsys, len) == 0) { 2706 freeenv(env); 2707 return (1); 2708 } 2709 cp += len; 2710 } 2711 freeenv(env); 2712 2713 return (0); 2714 } 2715 2716 /* 2717 * Control interface. 2718 * 2719 * We multiplex ioctls for all participating ACPI devices here. Individual 2720 * drivers wanting to be accessible via /dev/acpi should use the 2721 * register/deregister interface to make their handlers visible. 2722 */ 2723 struct acpi_ioctl_hook 2724 { 2725 TAILQ_ENTRY(acpi_ioctl_hook) link; 2726 u_long cmd; 2727 acpi_ioctl_fn fn; 2728 void *arg; 2729 }; 2730 2731 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2732 static int acpi_ioctl_hooks_initted; 2733 2734 int 2735 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2736 { 2737 struct acpi_ioctl_hook *hp; 2738 2739 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2740 return (ENOMEM); 2741 hp->cmd = cmd; 2742 hp->fn = fn; 2743 hp->arg = arg; 2744 2745 ACPI_LOCK(acpi); 2746 if (acpi_ioctl_hooks_initted == 0) { 2747 TAILQ_INIT(&acpi_ioctl_hooks); 2748 acpi_ioctl_hooks_initted = 1; 2749 } 2750 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2751 ACPI_UNLOCK(acpi); 2752 2753 return (0); 2754 } 2755 2756 void 2757 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2758 { 2759 struct acpi_ioctl_hook *hp; 2760 2761 ACPI_LOCK(acpi); 2762 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2763 if (hp->cmd == cmd && hp->fn == fn) 2764 break; 2765 2766 if (hp != NULL) { 2767 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2768 free(hp, M_ACPIDEV); 2769 } 2770 ACPI_UNLOCK(acpi); 2771 } 2772 2773 static int 2774 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2775 { 2776 return (0); 2777 } 2778 2779 static int 2780 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2781 { 2782 return (0); 2783 } 2784 2785 static int 2786 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2787 { 2788 struct acpi_softc *sc; 2789 struct acpi_ioctl_hook *hp; 2790 int error, state; 2791 2792 error = 0; 2793 hp = NULL; 2794 sc = dev->si_drv1; 2795 2796 /* 2797 * Scan the list of registered ioctls, looking for handlers. 2798 */ 2799 ACPI_LOCK(acpi); 2800 if (acpi_ioctl_hooks_initted) 2801 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2802 if (hp->cmd == cmd) 2803 break; 2804 } 2805 ACPI_UNLOCK(acpi); 2806 if (hp) 2807 return (hp->fn(cmd, addr, hp->arg)); 2808 2809 /* 2810 * Core ioctls are not permitted for non-writable user. 2811 * Currently, other ioctls just fetch information. 2812 * Not changing system behavior. 2813 */ 2814 if ((flag & FWRITE) == 0) 2815 return (EPERM); 2816 2817 /* Core system ioctls. */ 2818 switch (cmd) { 2819 case ACPIIO_SETSLPSTATE: 2820 error = EINVAL; 2821 state = *(int *)addr; 2822 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2823 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2824 error = 0; 2825 break; 2826 default: 2827 error = ENXIO; 2828 break; 2829 } 2830 2831 return (error); 2832 } 2833 2834 static int 2835 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2836 { 2837 int error; 2838 struct sbuf sb; 2839 UINT8 state, TypeA, TypeB; 2840 2841 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2842 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2843 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2844 sbuf_printf(&sb, "S%d ", state); 2845 sbuf_trim(&sb); 2846 sbuf_finish(&sb); 2847 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2848 sbuf_delete(&sb); 2849 return (error); 2850 } 2851 2852 static int 2853 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2854 { 2855 char sleep_state[10]; 2856 int error; 2857 u_int new_state, old_state; 2858 2859 old_state = *(u_int *)oidp->oid_arg1; 2860 if (old_state > ACPI_S_STATES_MAX + 1) 2861 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2862 else 2863 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2864 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2865 if (error == 0 && req->newptr != NULL) { 2866 new_state = ACPI_STATE_S0; 2867 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2868 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2869 break; 2870 if (new_state <= ACPI_S_STATES_MAX + 1) { 2871 if (new_state != old_state) 2872 *(u_int *)oidp->oid_arg1 = new_state; 2873 } else 2874 error = EINVAL; 2875 } 2876 2877 return (error); 2878 } 2879 2880 /* Inform devctl(4) when we receive a Notify. */ 2881 void 2882 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2883 { 2884 char notify_buf[16]; 2885 ACPI_BUFFER handle_buf; 2886 ACPI_STATUS status; 2887 2888 if (subsystem == NULL) 2889 return; 2890 2891 handle_buf.Pointer = NULL; 2892 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2893 status = AcpiNsHandleToPathname(h, &handle_buf); 2894 if (ACPI_FAILURE(status)) 2895 return; 2896 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2897 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2898 AcpiOsFree(handle_buf.Pointer); 2899 } 2900 2901 #ifdef ACPI_DEBUG 2902 /* 2903 * Support for parsing debug options from the kernel environment. 2904 * 2905 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2906 * by specifying the names of the bits in the debug.acpi.layer and 2907 * debug.acpi.level environment variables. Bits may be unset by 2908 * prefixing the bit name with !. 2909 */ 2910 struct debugtag 2911 { 2912 char *name; 2913 UINT32 value; 2914 }; 2915 2916 static struct debugtag dbg_layer[] = { 2917 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2918 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2919 {"ACPI_EVENTS", ACPI_EVENTS}, 2920 {"ACPI_TABLES", ACPI_TABLES}, 2921 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2922 {"ACPI_PARSER", ACPI_PARSER}, 2923 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2924 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2925 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2926 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2927 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2928 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2929 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2930 2931 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2932 {"ACPI_BATTERY", ACPI_BATTERY}, 2933 {"ACPI_BUS", ACPI_BUS}, 2934 {"ACPI_BUTTON", ACPI_BUTTON}, 2935 {"ACPI_EC", ACPI_EC}, 2936 {"ACPI_FAN", ACPI_FAN}, 2937 {"ACPI_POWERRES", ACPI_POWERRES}, 2938 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2939 {"ACPI_THERMAL", ACPI_THERMAL}, 2940 {"ACPI_TIMER", ACPI_TIMER}, 2941 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2942 {NULL, 0} 2943 }; 2944 2945 static struct debugtag dbg_level[] = { 2946 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2947 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2948 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2949 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2950 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2951 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2952 2953 /* Trace verbosity level 1 [Standard Trace Level] */ 2954 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2955 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2956 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2957 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2958 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2959 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2960 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2961 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2962 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2963 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2964 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2965 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2966 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2967 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2968 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2969 2970 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2971 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2972 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2973 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2974 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2975 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2976 2977 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2978 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2979 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2980 {"ACPI_LV_IO", ACPI_LV_IO}, 2981 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2982 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2983 2984 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 2985 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 2986 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 2987 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 2988 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 2989 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 2990 {NULL, 0} 2991 }; 2992 2993 static void 2994 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 2995 { 2996 char *ep; 2997 int i, l; 2998 int set; 2999 3000 while (*cp) { 3001 if (isspace(*cp)) { 3002 cp++; 3003 continue; 3004 } 3005 ep = cp; 3006 while (*ep && !isspace(*ep)) 3007 ep++; 3008 if (*cp == '!') { 3009 set = 0; 3010 cp++; 3011 if (cp == ep) 3012 continue; 3013 } else { 3014 set = 1; 3015 } 3016 l = ep - cp; 3017 for (i = 0; tag[i].name != NULL; i++) { 3018 if (!strncmp(cp, tag[i].name, l)) { 3019 if (set) 3020 *flag |= tag[i].value; 3021 else 3022 *flag &= ~tag[i].value; 3023 } 3024 } 3025 cp = ep; 3026 } 3027 } 3028 3029 static void 3030 acpi_set_debugging(void *junk) 3031 { 3032 char *layer, *level; 3033 3034 if (cold) { 3035 AcpiDbgLayer = 0; 3036 AcpiDbgLevel = 0; 3037 } 3038 3039 layer = getenv("debug.acpi.layer"); 3040 level = getenv("debug.acpi.level"); 3041 if (layer == NULL && level == NULL) 3042 return; 3043 3044 printf("ACPI set debug"); 3045 if (layer != NULL) { 3046 if (strcmp("NONE", layer) != 0) 3047 printf(" layer '%s'", layer); 3048 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3049 freeenv(layer); 3050 } 3051 if (level != NULL) { 3052 if (strcmp("NONE", level) != 0) 3053 printf(" level '%s'", level); 3054 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3055 freeenv(level); 3056 } 3057 printf("\n"); 3058 } 3059 3060 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3061 NULL); 3062 3063 static int 3064 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3065 { 3066 int error, *dbg; 3067 struct debugtag *tag; 3068 struct sbuf sb; 3069 3070 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3071 return (ENOMEM); 3072 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3073 tag = &dbg_layer[0]; 3074 dbg = &AcpiDbgLayer; 3075 } else { 3076 tag = &dbg_level[0]; 3077 dbg = &AcpiDbgLevel; 3078 } 3079 3080 /* Get old values if this is a get request. */ 3081 ACPI_SERIAL_BEGIN(acpi); 3082 if (*dbg == 0) { 3083 sbuf_cpy(&sb, "NONE"); 3084 } else if (req->newptr == NULL) { 3085 for (; tag->name != NULL; tag++) { 3086 if ((*dbg & tag->value) == tag->value) 3087 sbuf_printf(&sb, "%s ", tag->name); 3088 } 3089 } 3090 sbuf_trim(&sb); 3091 sbuf_finish(&sb); 3092 3093 /* Copy out the old values to the user. */ 3094 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3095 sbuf_delete(&sb); 3096 3097 /* If the user is setting a string, parse it. */ 3098 if (error == 0 && req->newptr != NULL) { 3099 *dbg = 0; 3100 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3101 acpi_set_debugging(NULL); 3102 } 3103 ACPI_SERIAL_END(acpi); 3104 3105 return (error); 3106 } 3107 3108 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3109 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3110 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3111 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3112 #endif /* ACPI_DEBUG */ 3113 3114 static int 3115 acpi_pm_func(u_long cmd, void *arg, ...) 3116 { 3117 int state, acpi_state; 3118 int error; 3119 struct acpi_softc *sc; 3120 va_list ap; 3121 3122 error = 0; 3123 switch (cmd) { 3124 case POWER_CMD_SUSPEND: 3125 sc = (struct acpi_softc *)arg; 3126 if (sc == NULL) { 3127 error = EINVAL; 3128 goto out; 3129 } 3130 3131 va_start(ap, arg); 3132 state = va_arg(ap, int); 3133 va_end(ap); 3134 3135 switch (state) { 3136 case POWER_SLEEP_STATE_STANDBY: 3137 acpi_state = sc->acpi_standby_sx; 3138 break; 3139 case POWER_SLEEP_STATE_SUSPEND: 3140 acpi_state = sc->acpi_suspend_sx; 3141 break; 3142 case POWER_SLEEP_STATE_HIBERNATE: 3143 acpi_state = ACPI_STATE_S4; 3144 break; 3145 default: 3146 error = EINVAL; 3147 goto out; 3148 } 3149 3150 acpi_SetSleepState(sc, acpi_state); 3151 break; 3152 default: 3153 error = EINVAL; 3154 goto out; 3155 } 3156 3157 out: 3158 return (error); 3159 } 3160 3161 static void 3162 acpi_pm_register(void *arg) 3163 { 3164 if (!cold || resource_disabled("acpi", 0)) 3165 return; 3166 3167 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3168 } 3169 3170 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3171