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 #include <vm/vm_param.h> 68 69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71 /* Hooks for the ACPI CA debugging infrastructure */ 72 #define _COMPONENT ACPI_BUS 73 ACPI_MODULE_NAME("ACPI") 74 75 static d_open_t acpiopen; 76 static d_close_t acpiclose; 77 static d_ioctl_t acpiioctl; 78 79 static struct cdevsw acpi_cdevsw = { 80 .d_version = D_VERSION, 81 .d_open = acpiopen, 82 .d_close = acpiclose, 83 .d_ioctl = acpiioctl, 84 .d_name = "acpi", 85 }; 86 87 /* Global mutex for locking access to the ACPI subsystem. */ 88 struct mtx acpi_mutex; 89 90 /* Bitmap of device quirks. */ 91 int acpi_quirks; 92 93 static int acpi_modevent(struct module *mod, int event, void *junk); 94 static void acpi_identify(driver_t *driver, device_t parent); 95 static int acpi_probe(device_t dev); 96 static int acpi_attach(device_t dev); 97 static int acpi_suspend(device_t dev); 98 static int acpi_resume(device_t dev); 99 static int acpi_shutdown(device_t dev); 100 static device_t acpi_add_child(device_t bus, int order, const char *name, 101 int unit); 102 static int acpi_print_child(device_t bus, device_t child); 103 static void acpi_probe_nomatch(device_t bus, device_t child); 104 static void acpi_driver_added(device_t dev, driver_t *driver); 105 static int acpi_read_ivar(device_t dev, device_t child, int index, 106 uintptr_t *result); 107 static int acpi_write_ivar(device_t dev, device_t child, int index, 108 uintptr_t value); 109 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 110 static int acpi_sysres_alloc(device_t dev); 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 ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 140 static void acpi_shutdown_final(void *arg, int howto); 141 static void acpi_enable_fixed_events(struct acpi_softc *sc); 142 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 144 static int acpi_wake_prep_walk(int sstate); 145 static int acpi_wake_sysctl_walk(device_t dev); 146 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 147 static void acpi_system_eventhandler_sleep(void *arg, int state); 148 static void acpi_system_eventhandler_wakeup(void *arg, int state); 149 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 151 static int acpi_pm_func(u_long cmd, void *arg, ...); 152 static int acpi_child_location_str_method(device_t acdev, device_t child, 153 char *buf, size_t buflen); 154 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 155 char *buf, size_t buflen); 156 157 static device_method_t acpi_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_identify, acpi_identify), 160 DEVMETHOD(device_probe, acpi_probe), 161 DEVMETHOD(device_attach, acpi_attach), 162 DEVMETHOD(device_shutdown, acpi_shutdown), 163 DEVMETHOD(device_detach, bus_generic_detach), 164 DEVMETHOD(device_suspend, acpi_suspend), 165 DEVMETHOD(device_resume, acpi_resume), 166 167 /* Bus interface */ 168 DEVMETHOD(bus_add_child, acpi_add_child), 169 DEVMETHOD(bus_print_child, acpi_print_child), 170 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 171 DEVMETHOD(bus_driver_added, acpi_driver_added), 172 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 173 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 174 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 175 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 176 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 177 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 178 DEVMETHOD(bus_release_resource, acpi_release_resource), 179 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 180 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 181 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 182 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 183 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 184 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 185 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 186 187 /* ACPI bus */ 188 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 189 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 190 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 191 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 192 193 /* PCI emulation */ 194 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 195 196 /* ISA emulation */ 197 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 198 199 {0, 0} 200 }; 201 202 static driver_t acpi_driver = { 203 "acpi", 204 acpi_methods, 205 sizeof(struct acpi_softc), 206 }; 207 208 static devclass_t acpi_devclass; 209 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 210 MODULE_VERSION(acpi, 1); 211 212 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 213 214 /* Local pools for managing system resources for ACPI child devices. */ 215 static struct rman acpi_rman_io, acpi_rman_mem; 216 217 #define ACPI_MINIMUM_AWAKETIME 5 218 219 static const char* sleep_state_names[] = { 220 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 221 222 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 223 static char acpi_ca_version[12]; 224 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 225 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 226 227 /* 228 * Allow override of whether methods execute in parallel or not. 229 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 230 * errors for AML that really can't handle parallel method execution. 231 * It is off by default since this breaks recursive methods and 232 * some IBMs use such code. 233 */ 234 static int acpi_serialize_methods; 235 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 236 237 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 238 static int acpi_do_powerstate = 1; 239 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 240 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 241 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 242 243 /* Allow users to override quirks. */ 244 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 245 246 static int acpi_susp_bounce; 247 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 248 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 249 250 /* 251 * ACPI can only be loaded as a module by the loader; activating it after 252 * system bootstrap time is not useful, and can be fatal to the system. 253 * It also cannot be unloaded, since the entire system bus heirarchy hangs 254 * off it. 255 */ 256 static int 257 acpi_modevent(struct module *mod, int event, void *junk) 258 { 259 switch (event) { 260 case MOD_LOAD: 261 if (!cold) { 262 printf("The ACPI driver cannot be loaded after boot.\n"); 263 return (EPERM); 264 } 265 break; 266 case MOD_UNLOAD: 267 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 268 return (EBUSY); 269 break; 270 default: 271 break; 272 } 273 return (0); 274 } 275 276 /* 277 * Perform early initialization. 278 */ 279 ACPI_STATUS 280 acpi_Startup(void) 281 { 282 static int started = 0; 283 ACPI_STATUS status; 284 int val; 285 286 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 287 288 /* Only run the startup code once. The MADT driver also calls this. */ 289 if (started) 290 return_VALUE (AE_OK); 291 started = 1; 292 293 /* 294 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 295 * if more tables exist. 296 */ 297 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 298 printf("ACPI: Table initialisation failed: %s\n", 299 AcpiFormatException(status)); 300 return_VALUE (status); 301 } 302 303 /* Set up any quirks we have for this system. */ 304 if (acpi_quirks == ACPI_Q_OK) 305 acpi_table_quirks(&acpi_quirks); 306 307 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 308 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 309 acpi_quirks &= ~ACPI_Q_BROKEN; 310 if (acpi_quirks & ACPI_Q_BROKEN) { 311 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 312 status = AE_SUPPORT; 313 } 314 315 return_VALUE (status); 316 } 317 318 /* 319 * Detect ACPI, perform early initialisation 320 */ 321 static void 322 acpi_identify(driver_t *driver, device_t parent) 323 { 324 device_t child; 325 326 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 327 328 if (!cold) 329 return_VOID; 330 331 /* Check that we haven't been disabled with a hint. */ 332 if (resource_disabled("acpi", 0)) 333 return_VOID; 334 335 /* Make sure we're not being doubly invoked. */ 336 if (device_find_child(parent, "acpi", 0) != NULL) 337 return_VOID; 338 339 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 340 341 /* Initialize root tables. */ 342 if (ACPI_FAILURE(acpi_Startup())) { 343 printf("ACPI: Try disabling either ACPI or apic support.\n"); 344 return_VOID; 345 } 346 347 /* Attach the actual ACPI device. */ 348 if ((child = BUS_ADD_CHILD(parent, 10, "acpi", 0)) == NULL) { 349 device_printf(parent, "device_identify failed\n"); 350 return_VOID; 351 } 352 } 353 354 /* 355 * Fetch some descriptive data from ACPI to put in our attach message. 356 */ 357 static int 358 acpi_probe(device_t dev) 359 { 360 ACPI_TABLE_RSDP *rsdp; 361 ACPI_TABLE_HEADER *rsdt; 362 ACPI_PHYSICAL_ADDRESS paddr; 363 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 364 struct sbuf sb; 365 366 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 367 368 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 369 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 370 device_printf(dev, "probe failed, other PM system enabled.\n"); 371 return_VALUE (ENXIO); 372 } 373 374 if ((paddr = AcpiOsGetRootPointer()) == 0 || 375 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 376 return_VALUE (ENXIO); 377 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 378 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 379 else 380 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 381 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 382 383 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 384 return_VALUE (ENXIO); 385 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 386 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 387 sbuf_trim(&sb); 388 sbuf_putc(&sb, ' '); 389 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 390 sbuf_trim(&sb); 391 sbuf_finish(&sb); 392 device_set_desc_copy(dev, sbuf_data(&sb)); 393 sbuf_delete(&sb); 394 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 395 396 return_VALUE (0); 397 } 398 399 static int 400 acpi_attach(device_t dev) 401 { 402 struct acpi_softc *sc; 403 ACPI_TABLE_FACS *facs; 404 ACPI_STATUS status; 405 int error, state; 406 UINT32 flags; 407 UINT8 TypeA, TypeB; 408 char *env; 409 410 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 411 412 sc = device_get_softc(dev); 413 sc->acpi_dev = dev; 414 callout_init(&sc->susp_force_to, TRUE); 415 416 error = ENXIO; 417 418 /* Initialize resource manager. */ 419 acpi_rman_io.rm_type = RMAN_ARRAY; 420 acpi_rman_io.rm_start = 0; 421 acpi_rman_io.rm_end = 0xffff; 422 acpi_rman_io.rm_descr = "ACPI I/O ports"; 423 if (rman_init(&acpi_rman_io) != 0) 424 panic("acpi rman_init IO ports failed"); 425 acpi_rman_mem.rm_type = RMAN_ARRAY; 426 acpi_rman_mem.rm_start = 0; 427 acpi_rman_mem.rm_end = ~0ul; 428 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 429 if (rman_init(&acpi_rman_mem) != 0) 430 panic("acpi rman_init memory failed"); 431 432 /* Initialise the ACPI mutex */ 433 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 434 435 /* 436 * Set the globals from our tunables. This is needed because ACPI-CA 437 * uses UINT8 for some values and we have no tunable_byte. 438 */ 439 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 440 AcpiGbl_EnableInterpreterSlack = TRUE; 441 442 /* Start up the ACPI CA subsystem. */ 443 status = AcpiInitializeSubsystem(); 444 if (ACPI_FAILURE(status)) { 445 device_printf(dev, "Could not initialize Subsystem: %s\n", 446 AcpiFormatException(status)); 447 goto out; 448 } 449 450 /* Load ACPI name space. */ 451 status = AcpiLoadTables(); 452 if (ACPI_FAILURE(status)) { 453 device_printf(dev, "Could not load Namespace: %s\n", 454 AcpiFormatException(status)); 455 goto out; 456 } 457 458 /* Install the default address space handlers. */ 459 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 460 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 461 if (ACPI_FAILURE(status)) { 462 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 463 AcpiFormatException(status)); 464 goto out; 465 } 466 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 467 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 468 if (ACPI_FAILURE(status)) { 469 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 474 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 475 if (ACPI_FAILURE(status)) { 476 device_printf(dev, "could not initialise PciConfig handler: %s\n", 477 AcpiFormatException(status)); 478 goto out; 479 } 480 481 /* 482 * Note that some systems (specifically, those with namespace evaluation 483 * issues that require the avoidance of parts of the namespace) must 484 * avoid running _INI and _STA on everything, as well as dodging the final 485 * object init pass. 486 * 487 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 488 * 489 * XXX We should arrange for the object init pass after we have attached 490 * all our child devices, but on many systems it works here. 491 */ 492 flags = 0; 493 if (testenv("debug.acpi.avoid")) 494 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 495 496 /* Bring the hardware and basic handlers online. */ 497 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 498 device_printf(dev, "Could not enable ACPI: %s\n", 499 AcpiFormatException(status)); 500 goto out; 501 } 502 503 /* 504 * Call the ECDT probe function to provide EC functionality before 505 * the namespace has been evaluated. 506 * 507 * XXX This happens before the sysresource devices have been probed and 508 * attached so its resources come from nexus0. In practice, this isn't 509 * a problem but should be addressed eventually. 510 */ 511 acpi_ec_ecdt_probe(dev); 512 513 /* Bring device objects and regions online. */ 514 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 515 device_printf(dev, "Could not initialize ACPI objects: %s\n", 516 AcpiFormatException(status)); 517 goto out; 518 } 519 520 /* 521 * Setup our sysctl tree. 522 * 523 * XXX: This doesn't check to make sure that none of these fail. 524 */ 525 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 526 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 527 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 528 device_get_name(dev), CTLFLAG_RD, 0, ""); 529 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 530 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 531 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 532 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 533 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 534 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 535 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 536 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 537 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 538 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 539 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 540 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 541 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 542 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 543 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 544 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 545 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 546 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 547 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 548 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 549 "sleep delay"); 550 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 552 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 553 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 554 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 555 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 556 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 557 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 558 OID_AUTO, "handle_reboot", CTLFLAG_RW, 559 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 560 561 /* 562 * Default to 1 second before sleeping to give some machines time to 563 * stabilize. 564 */ 565 sc->acpi_sleep_delay = 1; 566 if (bootverbose) 567 sc->acpi_verbose = 1; 568 if ((env = getenv("hw.acpi.verbose")) != NULL) { 569 if (strcmp(env, "0") != 0) 570 sc->acpi_verbose = 1; 571 freeenv(env); 572 } 573 574 /* Only enable S4BIOS by default if the FACS says it is available. */ 575 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 576 if (ACPI_FAILURE(status)) { 577 device_printf(dev, "couldn't get FACS: %s\n", 578 AcpiFormatException(status)); 579 error = ENXIO; 580 goto out; 581 } 582 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 583 sc->acpi_s4bios = 1; 584 585 /* 586 * Dispatch the default sleep state to devices. The lid switch is set 587 * to NONE by default to avoid surprising users. 588 */ 589 sc->acpi_power_button_sx = ACPI_STATE_S5; 590 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 591 sc->acpi_standby_sx = ACPI_STATE_S1; 592 sc->acpi_suspend_sx = ACPI_STATE_S3; 593 594 /* Pick the first valid sleep state for the sleep button default. */ 595 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 596 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 597 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 598 sc->acpi_sleep_button_sx = state; 599 break; 600 } 601 602 acpi_enable_fixed_events(sc); 603 604 /* 605 * Scan the namespace and attach/initialise children. 606 */ 607 608 /* Register our shutdown handler. */ 609 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 610 SHUTDOWN_PRI_LAST); 611 612 /* 613 * Register our acpi event handlers. 614 * XXX should be configurable eg. via userland policy manager. 615 */ 616 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 617 sc, ACPI_EVENT_PRI_LAST); 618 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 619 sc, ACPI_EVENT_PRI_LAST); 620 621 /* Flag our initial states. */ 622 sc->acpi_enabled = 1; 623 sc->acpi_sstate = ACPI_STATE_S0; 624 sc->acpi_sleep_disabled = 0; 625 626 /* Create the control device */ 627 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 628 "acpi"); 629 sc->acpi_dev_t->si_drv1 = sc; 630 631 if ((error = acpi_machdep_init(dev))) 632 goto out; 633 634 /* Register ACPI again to pass the correct argument of pm_func. */ 635 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 636 637 if (!acpi_disabled("bus")) 638 acpi_probe_children(dev); 639 640 error = 0; 641 642 out: 643 return_VALUE (error); 644 } 645 646 static int 647 acpi_suspend(device_t dev) 648 { 649 device_t child, *devlist; 650 int error, i, numdevs, pstate; 651 652 GIANT_REQUIRED; 653 654 /* First give child devices a chance to suspend. */ 655 error = bus_generic_suspend(dev); 656 if (error) 657 return (error); 658 659 /* 660 * Now, set them into the appropriate power state, usually D3. If the 661 * device has an _SxD method for the next sleep state, use that power 662 * state instead. 663 */ 664 device_get_children(dev, &devlist, &numdevs); 665 for (i = 0; i < numdevs; i++) { 666 /* If the device is not attached, we've powered it down elsewhere. */ 667 child = devlist[i]; 668 if (!device_is_attached(child)) 669 continue; 670 671 /* 672 * Default to D3 for all sleep states. The _SxD method is optional 673 * so set the powerstate even if it's absent. 674 */ 675 pstate = PCI_POWERSTATE_D3; 676 error = acpi_device_pwr_for_sleep(device_get_parent(child), 677 child, &pstate); 678 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 679 pci_set_powerstate(child, pstate); 680 } 681 free(devlist, M_TEMP); 682 error = 0; 683 684 return (error); 685 } 686 687 static int 688 acpi_resume(device_t dev) 689 { 690 ACPI_HANDLE handle; 691 int i, numdevs; 692 device_t child, *devlist; 693 694 GIANT_REQUIRED; 695 696 /* 697 * Put all devices in D0 before resuming them. Call _S0D on each one 698 * since some systems expect this. 699 */ 700 device_get_children(dev, &devlist, &numdevs); 701 for (i = 0; i < numdevs; i++) { 702 child = devlist[i]; 703 handle = acpi_get_handle(child); 704 if (handle) 705 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 706 if (device_is_attached(child) && acpi_do_powerstate) 707 pci_set_powerstate(child, PCI_POWERSTATE_D0); 708 } 709 free(devlist, M_TEMP); 710 711 return (bus_generic_resume(dev)); 712 } 713 714 static int 715 acpi_shutdown(device_t dev) 716 { 717 718 GIANT_REQUIRED; 719 720 /* Allow children to shutdown first. */ 721 bus_generic_shutdown(dev); 722 723 /* 724 * Enable any GPEs that are able to power-on the system (i.e., RTC). 725 * Also, disable any that are not valid for this state (most). 726 */ 727 acpi_wake_prep_walk(ACPI_STATE_S5); 728 729 return (0); 730 } 731 732 /* 733 * Handle a new device being added 734 */ 735 static device_t 736 acpi_add_child(device_t bus, int order, const char *name, int unit) 737 { 738 struct acpi_device *ad; 739 device_t child; 740 741 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 742 return (NULL); 743 744 resource_list_init(&ad->ad_rl); 745 746 child = device_add_child_ordered(bus, order, name, unit); 747 if (child != NULL) 748 device_set_ivars(child, ad); 749 else 750 free(ad, M_ACPIDEV); 751 return (child); 752 } 753 754 static int 755 acpi_print_child(device_t bus, device_t child) 756 { 757 struct acpi_device *adev = device_get_ivars(child); 758 struct resource_list *rl = &adev->ad_rl; 759 int retval = 0; 760 761 retval += bus_print_child_header(bus, child); 762 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 763 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 764 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 765 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 766 if (device_get_flags(child)) 767 retval += printf(" flags %#x", device_get_flags(child)); 768 retval += bus_print_child_footer(bus, child); 769 770 return (retval); 771 } 772 773 /* 774 * If this device is an ACPI child but no one claimed it, attempt 775 * to power it off. We'll power it back up when a driver is added. 776 * 777 * XXX Disabled for now since many necessary devices (like fdc and 778 * ATA) don't claim the devices we created for them but still expect 779 * them to be powered up. 780 */ 781 static void 782 acpi_probe_nomatch(device_t bus, device_t child) 783 { 784 785 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 786 } 787 788 /* 789 * If a new driver has a chance to probe a child, first power it up. 790 * 791 * XXX Disabled for now (see acpi_probe_nomatch for details). 792 */ 793 static void 794 acpi_driver_added(device_t dev, driver_t *driver) 795 { 796 device_t child, *devlist; 797 int i, numdevs; 798 799 DEVICE_IDENTIFY(driver, dev); 800 device_get_children(dev, &devlist, &numdevs); 801 for (i = 0; i < numdevs; i++) { 802 child = devlist[i]; 803 if (device_get_state(child) == DS_NOTPRESENT) { 804 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 805 if (device_probe_and_attach(child) != 0) 806 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 807 } 808 } 809 free(devlist, M_TEMP); 810 } 811 812 /* Location hint for devctl(8) */ 813 static int 814 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 815 size_t buflen) 816 { 817 struct acpi_device *dinfo = device_get_ivars(child); 818 819 if (dinfo->ad_handle) 820 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 821 else 822 snprintf(buf, buflen, "unknown"); 823 return (0); 824 } 825 826 /* PnP information for devctl(8) */ 827 static int 828 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 829 size_t buflen) 830 { 831 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 832 ACPI_DEVICE_INFO *adinfo; 833 struct acpi_device *dinfo = device_get_ivars(child); 834 char *end; 835 int error; 836 837 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 838 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 839 if (error) 840 snprintf(buf, buflen, "unknown"); 841 else 842 snprintf(buf, buflen, "_HID=%s _UID=%lu", 843 (adinfo->Valid & ACPI_VALID_HID) ? 844 adinfo->HardwareId.Value : "none", 845 (adinfo->Valid & ACPI_VALID_UID) ? 846 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 847 if (adinfo) 848 AcpiOsFree(adinfo); 849 850 return (0); 851 } 852 853 /* 854 * Handle per-device ivars 855 */ 856 static int 857 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 858 { 859 struct acpi_device *ad; 860 861 if ((ad = device_get_ivars(child)) == NULL) { 862 printf("device has no ivars\n"); 863 return (ENOENT); 864 } 865 866 /* ACPI and ISA compatibility ivars */ 867 switch(index) { 868 case ACPI_IVAR_HANDLE: 869 *(ACPI_HANDLE *)result = ad->ad_handle; 870 break; 871 case ACPI_IVAR_MAGIC: 872 *(uintptr_t *)result = ad->ad_magic; 873 break; 874 case ACPI_IVAR_PRIVATE: 875 *(void **)result = ad->ad_private; 876 break; 877 case ACPI_IVAR_FLAGS: 878 *(int *)result = ad->ad_flags; 879 break; 880 case ISA_IVAR_VENDORID: 881 case ISA_IVAR_SERIAL: 882 case ISA_IVAR_COMPATID: 883 *(int *)result = -1; 884 break; 885 case ISA_IVAR_LOGICALID: 886 *(int *)result = acpi_isa_get_logicalid(child); 887 break; 888 default: 889 return (ENOENT); 890 } 891 892 return (0); 893 } 894 895 static int 896 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 897 { 898 struct acpi_device *ad; 899 900 if ((ad = device_get_ivars(child)) == NULL) { 901 printf("device has no ivars\n"); 902 return (ENOENT); 903 } 904 905 switch(index) { 906 case ACPI_IVAR_HANDLE: 907 ad->ad_handle = (ACPI_HANDLE)value; 908 break; 909 case ACPI_IVAR_MAGIC: 910 ad->ad_magic = (uintptr_t)value; 911 break; 912 case ACPI_IVAR_PRIVATE: 913 ad->ad_private = (void *)value; 914 break; 915 case ACPI_IVAR_FLAGS: 916 ad->ad_flags = (int)value; 917 break; 918 default: 919 panic("bad ivar write request (%d)", index); 920 return (ENOENT); 921 } 922 923 return (0); 924 } 925 926 /* 927 * Handle child resource allocation/removal 928 */ 929 static struct resource_list * 930 acpi_get_rlist(device_t dev, device_t child) 931 { 932 struct acpi_device *ad; 933 934 ad = device_get_ivars(child); 935 return (&ad->ad_rl); 936 } 937 938 /* 939 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 940 * duplicates, we merge any in the sysresource attach routine. 941 */ 942 static int 943 acpi_sysres_alloc(device_t dev) 944 { 945 struct resource *res; 946 struct resource_list *rl; 947 struct resource_list_entry *rle; 948 struct rman *rm; 949 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 950 device_t *children; 951 int child_count, i; 952 953 /* 954 * Probe/attach any sysresource devices. This would be unnecessary if we 955 * had multi-pass probe/attach. 956 */ 957 if (device_get_children(dev, &children, &child_count) != 0) 958 return (ENXIO); 959 for (i = 0; i < child_count; i++) { 960 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 961 device_probe_and_attach(children[i]); 962 } 963 free(children, M_TEMP); 964 965 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 966 STAILQ_FOREACH(rle, rl, link) { 967 if (rle->res != NULL) { 968 device_printf(dev, "duplicate resource for %lx\n", rle->start); 969 continue; 970 } 971 972 /* Only memory and IO resources are valid here. */ 973 switch (rle->type) { 974 case SYS_RES_IOPORT: 975 rm = &acpi_rman_io; 976 break; 977 case SYS_RES_MEMORY: 978 rm = &acpi_rman_mem; 979 break; 980 default: 981 continue; 982 } 983 984 /* Pre-allocate resource and add to our rman pool. */ 985 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 986 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 987 if (res != NULL) { 988 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 989 rle->res = res; 990 } else 991 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 992 rle->start, rle->count, rle->type); 993 } 994 return (0); 995 } 996 997 static struct resource * 998 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 999 u_long start, u_long end, u_long count, u_int flags) 1000 { 1001 ACPI_RESOURCE ares; 1002 struct acpi_device *ad = device_get_ivars(child); 1003 struct resource_list *rl = &ad->ad_rl; 1004 struct resource_list_entry *rle; 1005 struct resource *res; 1006 struct rman *rm; 1007 1008 res = NULL; 1009 1010 /* We only handle memory and IO resources through rman. */ 1011 switch (type) { 1012 case SYS_RES_IOPORT: 1013 rm = &acpi_rman_io; 1014 break; 1015 case SYS_RES_MEMORY: 1016 rm = &acpi_rman_mem; 1017 break; 1018 default: 1019 rm = NULL; 1020 } 1021 1022 ACPI_SERIAL_BEGIN(acpi); 1023 1024 /* 1025 * If this is an allocation of the "default" range for a given RID, and 1026 * we know what the resources for this device are (i.e., they're on the 1027 * child's resource list), use those start/end values. 1028 */ 1029 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1030 rle = resource_list_find(rl, type, *rid); 1031 if (rle == NULL) 1032 goto out; 1033 start = rle->start; 1034 end = rle->end; 1035 count = rle->count; 1036 } 1037 1038 /* 1039 * If this is an allocation of a specific range, see if we can satisfy 1040 * the request from our system resource regions. If we can't, pass the 1041 * request up to the parent. 1042 */ 1043 if (start + count - 1 == end && rm != NULL) 1044 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1045 child); 1046 if (res == NULL) { 1047 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1048 start, end, count, flags); 1049 } else { 1050 rman_set_rid(res, *rid); 1051 1052 /* If requested, activate the resource using the parent's method. */ 1053 if (flags & RF_ACTIVE) 1054 if (bus_activate_resource(child, type, *rid, res) != 0) { 1055 rman_release_resource(res); 1056 res = NULL; 1057 goto out; 1058 } 1059 } 1060 1061 if (res != NULL && device_get_parent(child) == bus) 1062 switch (type) { 1063 case SYS_RES_IRQ: 1064 /* 1065 * Since bus_config_intr() takes immediate effect, we cannot 1066 * configure the interrupt associated with a device when we 1067 * parse the resources but have to defer it until a driver 1068 * actually allocates the interrupt via bus_alloc_resource(). 1069 * 1070 * XXX: Should we handle the lookup failing? 1071 */ 1072 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1073 acpi_config_intr(child, &ares); 1074 break; 1075 } 1076 1077 out: 1078 ACPI_SERIAL_END(acpi); 1079 return (res); 1080 } 1081 1082 static int 1083 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1084 struct resource *r) 1085 { 1086 struct rman *rm; 1087 int ret; 1088 1089 /* We only handle memory and IO resources through rman. */ 1090 switch (type) { 1091 case SYS_RES_IOPORT: 1092 rm = &acpi_rman_io; 1093 break; 1094 case SYS_RES_MEMORY: 1095 rm = &acpi_rman_mem; 1096 break; 1097 default: 1098 rm = NULL; 1099 } 1100 1101 ACPI_SERIAL_BEGIN(acpi); 1102 1103 /* 1104 * If this resource belongs to one of our internal managers, 1105 * deactivate it and release it to the local pool. If it doesn't, 1106 * pass this request up to the parent. 1107 */ 1108 if (rm != NULL && rman_is_region_manager(r, rm)) { 1109 if (rman_get_flags(r) & RF_ACTIVE) { 1110 ret = bus_deactivate_resource(child, type, rid, r); 1111 if (ret != 0) 1112 goto out; 1113 } 1114 ret = rman_release_resource(r); 1115 } else 1116 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1117 1118 out: 1119 ACPI_SERIAL_END(acpi); 1120 return (ret); 1121 } 1122 1123 static void 1124 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1125 { 1126 struct resource_list *rl; 1127 1128 rl = acpi_get_rlist(bus, child); 1129 resource_list_delete(rl, type, rid); 1130 } 1131 1132 /* Allocate an IO port or memory resource, given its GAS. */ 1133 int 1134 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1135 struct resource **res, u_int flags) 1136 { 1137 int error, res_type; 1138 1139 error = ENOMEM; 1140 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1141 return (EINVAL); 1142 1143 /* We only support memory and IO spaces. */ 1144 switch (gas->SpaceId) { 1145 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1146 res_type = SYS_RES_MEMORY; 1147 break; 1148 case ACPI_ADR_SPACE_SYSTEM_IO: 1149 res_type = SYS_RES_IOPORT; 1150 break; 1151 default: 1152 return (EOPNOTSUPP); 1153 } 1154 1155 /* 1156 * If the register width is less than 8, assume the BIOS author means 1157 * it is a bit field and just allocate a byte. 1158 */ 1159 if (gas->BitWidth && gas->BitWidth < 8) 1160 gas->BitWidth = 8; 1161 1162 /* Validate the address after we're sure we support the space. */ 1163 if (gas->Address == 0 || gas->BitWidth == 0) 1164 return (EINVAL); 1165 1166 bus_set_resource(dev, res_type, *rid, gas->Address, 1167 gas->BitWidth / 8); 1168 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1169 if (*res != NULL) { 1170 *type = res_type; 1171 error = 0; 1172 } else 1173 bus_delete_resource(dev, res_type, *rid); 1174 1175 return (error); 1176 } 1177 1178 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1179 static uint32_t 1180 acpi_isa_get_logicalid(device_t dev) 1181 { 1182 ACPI_DEVICE_INFO *devinfo; 1183 ACPI_BUFFER buf; 1184 ACPI_HANDLE h; 1185 ACPI_STATUS error; 1186 u_int32_t pnpid; 1187 1188 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1189 1190 pnpid = 0; 1191 buf.Pointer = NULL; 1192 buf.Length = ACPI_ALLOCATE_BUFFER; 1193 1194 /* Fetch and validate the HID. */ 1195 if ((h = acpi_get_handle(dev)) == NULL) 1196 goto out; 1197 error = AcpiGetObjectInfo(h, &buf); 1198 if (ACPI_FAILURE(error)) 1199 goto out; 1200 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1201 1202 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1203 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1204 1205 out: 1206 if (buf.Pointer != NULL) 1207 AcpiOsFree(buf.Pointer); 1208 return_VALUE (pnpid); 1209 } 1210 1211 static int 1212 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1213 { 1214 ACPI_DEVICE_INFO *devinfo; 1215 ACPI_BUFFER buf; 1216 ACPI_HANDLE h; 1217 ACPI_STATUS error; 1218 uint32_t *pnpid; 1219 int valid, i; 1220 1221 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1222 1223 pnpid = cids; 1224 valid = 0; 1225 buf.Pointer = NULL; 1226 buf.Length = ACPI_ALLOCATE_BUFFER; 1227 1228 /* Fetch and validate the CID */ 1229 if ((h = acpi_get_handle(dev)) == NULL) 1230 goto out; 1231 error = AcpiGetObjectInfo(h, &buf); 1232 if (ACPI_FAILURE(error)) 1233 goto out; 1234 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1235 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1236 goto out; 1237 1238 if (devinfo->CompatibilityId.Count < count) 1239 count = devinfo->CompatibilityId.Count; 1240 for (i = 0; i < count; i++) { 1241 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1242 continue; 1243 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1244 valid++; 1245 } 1246 1247 out: 1248 if (buf.Pointer != NULL) 1249 AcpiOsFree(buf.Pointer); 1250 return_VALUE (valid); 1251 } 1252 1253 static char * 1254 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1255 { 1256 ACPI_HANDLE h; 1257 int i; 1258 1259 h = acpi_get_handle(dev); 1260 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1261 return (NULL); 1262 1263 /* Try to match one of the array of IDs with a HID or CID. */ 1264 for (i = 0; ids[i] != NULL; i++) { 1265 if (acpi_MatchHid(h, ids[i])) 1266 return (ids[i]); 1267 } 1268 return (NULL); 1269 } 1270 1271 static ACPI_STATUS 1272 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1273 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1274 { 1275 ACPI_HANDLE h; 1276 1277 if (dev == NULL) 1278 h = ACPI_ROOT_OBJECT; 1279 else if ((h = acpi_get_handle(dev)) == NULL) 1280 return (AE_BAD_PARAMETER); 1281 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1282 } 1283 1284 static int 1285 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1286 { 1287 struct acpi_softc *sc; 1288 ACPI_HANDLE handle; 1289 ACPI_STATUS status; 1290 char sxd[8]; 1291 int error; 1292 1293 sc = device_get_softc(bus); 1294 handle = acpi_get_handle(dev); 1295 1296 /* 1297 * XXX If we find these devices, don't try to power them down. 1298 * The serial and IRDA ports on my T23 hang the system when 1299 * set to D3 and it appears that such legacy devices may 1300 * need special handling in their drivers. 1301 */ 1302 if (handle == NULL || 1303 acpi_MatchHid(handle, "PNP0500") || 1304 acpi_MatchHid(handle, "PNP0501") || 1305 acpi_MatchHid(handle, "PNP0502") || 1306 acpi_MatchHid(handle, "PNP0510") || 1307 acpi_MatchHid(handle, "PNP0511")) 1308 return (ENXIO); 1309 1310 /* 1311 * Override next state with the value from _SxD, if present. If no 1312 * dstate argument was provided, don't fetch the return value. 1313 */ 1314 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1315 if (dstate) 1316 status = acpi_GetInteger(handle, sxd, dstate); 1317 else 1318 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1319 1320 switch (status) { 1321 case AE_OK: 1322 error = 0; 1323 break; 1324 case AE_NOT_FOUND: 1325 error = ESRCH; 1326 break; 1327 default: 1328 error = ENXIO; 1329 break; 1330 } 1331 1332 return (error); 1333 } 1334 1335 /* Callback arg for our implementation of walking the namespace. */ 1336 struct acpi_device_scan_ctx { 1337 acpi_scan_cb_t user_fn; 1338 void *arg; 1339 ACPI_HANDLE parent; 1340 }; 1341 1342 static ACPI_STATUS 1343 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1344 { 1345 struct acpi_device_scan_ctx *ctx; 1346 device_t dev, old_dev; 1347 ACPI_STATUS status; 1348 ACPI_OBJECT_TYPE type; 1349 1350 /* 1351 * Skip this device if we think we'll have trouble with it or it is 1352 * the parent where the scan began. 1353 */ 1354 ctx = (struct acpi_device_scan_ctx *)arg; 1355 if (acpi_avoid(h) || h == ctx->parent) 1356 return (AE_OK); 1357 1358 /* If this is not a valid device type (e.g., a method), skip it. */ 1359 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1360 return (AE_OK); 1361 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1362 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1363 return (AE_OK); 1364 1365 /* 1366 * Call the user function with the current device. If it is unchanged 1367 * afterwards, return. Otherwise, we update the handle to the new dev. 1368 */ 1369 old_dev = acpi_get_device(h); 1370 dev = old_dev; 1371 status = ctx->user_fn(h, &dev, level, ctx->arg); 1372 if (ACPI_FAILURE(status) || old_dev == dev) 1373 return (status); 1374 1375 /* Remove the old child and its connection to the handle. */ 1376 if (old_dev != NULL) { 1377 device_delete_child(device_get_parent(old_dev), old_dev); 1378 AcpiDetachData(h, acpi_fake_objhandler); 1379 } 1380 1381 /* Recreate the handle association if the user created a device. */ 1382 if (dev != NULL) 1383 AcpiAttachData(h, acpi_fake_objhandler, dev); 1384 1385 return (AE_OK); 1386 } 1387 1388 static ACPI_STATUS 1389 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1390 acpi_scan_cb_t user_fn, void *arg) 1391 { 1392 ACPI_HANDLE h; 1393 struct acpi_device_scan_ctx ctx; 1394 1395 if (acpi_disabled("children")) 1396 return (AE_OK); 1397 1398 if (dev == NULL) 1399 h = ACPI_ROOT_OBJECT; 1400 else if ((h = acpi_get_handle(dev)) == NULL) 1401 return (AE_BAD_PARAMETER); 1402 ctx.user_fn = user_fn; 1403 ctx.arg = arg; 1404 ctx.parent = h; 1405 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1406 acpi_device_scan_cb, &ctx, NULL)); 1407 } 1408 1409 /* 1410 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1411 * device power states since it's close enough to ACPI. 1412 */ 1413 static int 1414 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1415 { 1416 ACPI_HANDLE h; 1417 ACPI_STATUS status; 1418 int error; 1419 1420 error = 0; 1421 h = acpi_get_handle(child); 1422 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1423 return (EINVAL); 1424 if (h == NULL) 1425 return (0); 1426 1427 /* Ignore errors if the power methods aren't present. */ 1428 status = acpi_pwr_switch_consumer(h, state); 1429 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1430 && status != AE_BAD_PARAMETER) 1431 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1432 state, acpi_name(h), AcpiFormatException(status)); 1433 1434 return (error); 1435 } 1436 1437 static int 1438 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1439 { 1440 int result, cid_count, i; 1441 uint32_t lid, cids[8]; 1442 1443 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1444 1445 /* 1446 * ISA-style drivers attached to ACPI may persist and 1447 * probe manually if we return ENOENT. We never want 1448 * that to happen, so don't ever return it. 1449 */ 1450 result = ENXIO; 1451 1452 /* Scan the supplied IDs for a match */ 1453 lid = acpi_isa_get_logicalid(child); 1454 cid_count = acpi_isa_get_compatid(child, cids, 8); 1455 while (ids && ids->ip_id) { 1456 if (lid == ids->ip_id) { 1457 result = 0; 1458 goto out; 1459 } 1460 for (i = 0; i < cid_count; i++) { 1461 if (cids[i] == ids->ip_id) { 1462 result = 0; 1463 goto out; 1464 } 1465 } 1466 ids++; 1467 } 1468 1469 out: 1470 if (result == 0 && ids->ip_desc) 1471 device_set_desc(child, ids->ip_desc); 1472 1473 return_VALUE (result); 1474 } 1475 1476 /* 1477 * Scan all of the ACPI namespace and attach child devices. 1478 * 1479 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1480 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1481 * However, in violation of the spec, some systems place their PCI link 1482 * devices in \, so we have to walk the whole namespace. We check the 1483 * type of namespace nodes, so this should be ok. 1484 */ 1485 static void 1486 acpi_probe_children(device_t bus) 1487 { 1488 1489 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1490 1491 /* 1492 * Scan the namespace and insert placeholders for all the devices that 1493 * we find. We also probe/attach any early devices. 1494 * 1495 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1496 * we want to create nodes for all devices, not just those that are 1497 * currently present. (This assumes that we don't want to create/remove 1498 * devices as they appear, which might be smarter.) 1499 */ 1500 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1501 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1502 bus, NULL); 1503 1504 /* Pre-allocate resources for our rman from any sysresource devices. */ 1505 acpi_sysres_alloc(bus); 1506 1507 /* Create any static children by calling device identify methods. */ 1508 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1509 bus_generic_probe(bus); 1510 1511 /* Probe/attach all children, created staticly and from the namespace. */ 1512 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1513 bus_generic_attach(bus); 1514 1515 /* 1516 * Some of these children may have attached others as part of their attach 1517 * process (eg. the root PCI bus driver), so rescan. 1518 */ 1519 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1520 bus_generic_attach(bus); 1521 1522 /* Attach wake sysctls. */ 1523 acpi_wake_sysctl_walk(bus); 1524 1525 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1526 return_VOID; 1527 } 1528 1529 /* 1530 * Determine the probe order for a given device and return non-zero if it 1531 * should be attached immediately. 1532 */ 1533 static int 1534 acpi_probe_order(ACPI_HANDLE handle, int *order) 1535 { 1536 1537 /* 1538 * 1. I/O port and memory system resource holders 1539 * 2. Embedded controllers (to handle early accesses) 1540 * 3. PCI Link Devices 1541 */ 1542 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1543 *order = 1; 1544 else if (acpi_MatchHid(handle, "PNP0C09")) 1545 *order = 2; 1546 else if (acpi_MatchHid(handle, "PNP0C0F")) 1547 *order = 3; 1548 return (0); 1549 } 1550 1551 /* 1552 * Evaluate a child device and determine whether we might attach a device to 1553 * it. 1554 */ 1555 static ACPI_STATUS 1556 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1557 { 1558 ACPI_OBJECT_TYPE type; 1559 ACPI_HANDLE h; 1560 device_t bus, child; 1561 int order; 1562 char *handle_str, **search; 1563 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1564 1565 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1566 1567 /* Skip this device if we think we'll have trouble with it. */ 1568 if (acpi_avoid(handle)) 1569 return_ACPI_STATUS (AE_OK); 1570 1571 bus = (device_t)context; 1572 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1573 switch (type) { 1574 case ACPI_TYPE_DEVICE: 1575 case ACPI_TYPE_PROCESSOR: 1576 case ACPI_TYPE_THERMAL: 1577 case ACPI_TYPE_POWER: 1578 if (acpi_disabled("children")) 1579 break; 1580 1581 /* 1582 * Since we scan from \, be sure to skip system scope objects. 1583 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1584 */ 1585 handle_str = acpi_name(handle); 1586 for (search = scopes; *search != NULL; search++) { 1587 if (strcmp(handle_str, *search) == 0) 1588 break; 1589 } 1590 if (*search != NULL) 1591 break; 1592 1593 /* 1594 * Create a placeholder device for this node. Sort the placeholder 1595 * so that the probe/attach passes will run breadth-first. Orders 1596 * less than ACPI_DEV_BASE_ORDER are reserved for special objects 1597 * (i.e., system resources). Larger values are used for all other 1598 * devices. 1599 */ 1600 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1601 order = (level + 1) * ACPI_DEV_BASE_ORDER; 1602 acpi_probe_order(handle, &order); 1603 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1604 if (child == NULL) 1605 break; 1606 1607 /* Associate the handle with the device_t and vice versa. */ 1608 acpi_set_handle(child, handle); 1609 AcpiAttachData(handle, acpi_fake_objhandler, child); 1610 1611 /* 1612 * Check that the device is present. If it's not present, 1613 * leave it disabled (so that we have a device_t attached to 1614 * the handle, but we don't probe it). 1615 * 1616 * XXX PCI link devices sometimes report "present" but not 1617 * "functional" (i.e. if disabled). Go ahead and probe them 1618 * anyway since we may enable them later. 1619 */ 1620 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1621 /* Never disable PCI link devices. */ 1622 if (acpi_MatchHid(handle, "PNP0C0F")) 1623 break; 1624 /* 1625 * Docking stations should remain enabled since the system 1626 * may be undocked at boot. 1627 */ 1628 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1629 break; 1630 1631 device_disable(child); 1632 break; 1633 } 1634 1635 /* 1636 * Get the device's resource settings and attach them. 1637 * Note that if the device has _PRS but no _CRS, we need 1638 * to decide when it's appropriate to try to configure the 1639 * device. Ignore the return value here; it's OK for the 1640 * device not to have any resources. 1641 */ 1642 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1643 break; 1644 } 1645 } 1646 1647 return_ACPI_STATUS (AE_OK); 1648 } 1649 1650 /* 1651 * AcpiAttachData() requires an object handler but never uses it. This is a 1652 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1653 */ 1654 void 1655 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1656 { 1657 } 1658 1659 static void 1660 acpi_shutdown_final(void *arg, int howto) 1661 { 1662 struct acpi_softc *sc; 1663 ACPI_STATUS status; 1664 1665 /* 1666 * XXX Shutdown code should only run on the BSP (cpuid 0). 1667 * Some chipsets do not power off the system correctly if called from 1668 * an AP. 1669 */ 1670 sc = arg; 1671 if ((howto & RB_POWEROFF) != 0) { 1672 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1673 if (ACPI_FAILURE(status)) { 1674 printf("AcpiEnterSleepStatePrep failed - %s\n", 1675 AcpiFormatException(status)); 1676 return; 1677 } 1678 printf("Powering system off using ACPI\n"); 1679 ACPI_DISABLE_IRQS(); 1680 status = AcpiEnterSleepState(ACPI_STATE_S5); 1681 if (ACPI_FAILURE(status)) { 1682 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1683 } else { 1684 DELAY(1000000); 1685 printf("ACPI power-off failed - timeout\n"); 1686 } 1687 } else if ((howto & RB_HALT) == 0 && 1688 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1689 sc->acpi_handle_reboot) { 1690 /* Reboot using the reset register. */ 1691 status = AcpiHwLowLevelWrite( 1692 AcpiGbl_FADT.ResetRegister.BitWidth, 1693 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1694 if (ACPI_FAILURE(status)) { 1695 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1696 } else { 1697 DELAY(1000000); 1698 printf("ACPI reset failed - timeout\n"); 1699 } 1700 } else if (sc->acpi_do_disable && panicstr == NULL) { 1701 /* 1702 * Only disable ACPI if the user requested. On some systems, writing 1703 * the disable value to SMI_CMD hangs the system. 1704 */ 1705 printf("Shutting down ACPI\n"); 1706 AcpiTerminate(); 1707 } 1708 } 1709 1710 static void 1711 acpi_enable_fixed_events(struct acpi_softc *sc) 1712 { 1713 static int first_time = 1; 1714 1715 /* Enable and clear fixed events and install handlers. */ 1716 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1717 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1718 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1719 acpi_event_power_button_sleep, sc); 1720 if (first_time) 1721 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1722 } 1723 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1724 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1725 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1726 acpi_event_sleep_button_sleep, sc); 1727 if (first_time) 1728 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1729 } 1730 1731 first_time = 0; 1732 } 1733 1734 /* 1735 * Returns true if the device is actually present and should 1736 * be attached to. This requires the present, enabled, UI-visible 1737 * and diagnostics-passed bits to be set. 1738 */ 1739 BOOLEAN 1740 acpi_DeviceIsPresent(device_t dev) 1741 { 1742 ACPI_DEVICE_INFO *devinfo; 1743 ACPI_HANDLE h; 1744 ACPI_BUFFER buf; 1745 ACPI_STATUS error; 1746 int ret; 1747 1748 ret = FALSE; 1749 if ((h = acpi_get_handle(dev)) == NULL) 1750 return (FALSE); 1751 buf.Pointer = NULL; 1752 buf.Length = ACPI_ALLOCATE_BUFFER; 1753 error = AcpiGetObjectInfo(h, &buf); 1754 if (ACPI_FAILURE(error)) 1755 return (FALSE); 1756 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1757 1758 /* If no _STA method, must be present */ 1759 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1760 ret = TRUE; 1761 1762 /* Return true for 'present' and 'functioning' */ 1763 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1764 ret = TRUE; 1765 1766 AcpiOsFree(buf.Pointer); 1767 return (ret); 1768 } 1769 1770 /* 1771 * Returns true if the battery is actually present and inserted. 1772 */ 1773 BOOLEAN 1774 acpi_BatteryIsPresent(device_t dev) 1775 { 1776 ACPI_DEVICE_INFO *devinfo; 1777 ACPI_HANDLE h; 1778 ACPI_BUFFER buf; 1779 ACPI_STATUS error; 1780 int ret; 1781 1782 ret = FALSE; 1783 if ((h = acpi_get_handle(dev)) == NULL) 1784 return (FALSE); 1785 buf.Pointer = NULL; 1786 buf.Length = ACPI_ALLOCATE_BUFFER; 1787 error = AcpiGetObjectInfo(h, &buf); 1788 if (ACPI_FAILURE(error)) 1789 return (FALSE); 1790 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1791 1792 /* If no _STA method, must be present */ 1793 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1794 ret = TRUE; 1795 1796 /* Return true for 'present', 'battery present', and 'functioning' */ 1797 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1798 ret = TRUE; 1799 1800 AcpiOsFree(buf.Pointer); 1801 return (ret); 1802 } 1803 1804 /* 1805 * Match a HID string against a handle 1806 */ 1807 static BOOLEAN 1808 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1809 { 1810 ACPI_DEVICE_INFO *devinfo; 1811 ACPI_BUFFER buf; 1812 ACPI_STATUS error; 1813 int ret, i; 1814 1815 ret = FALSE; 1816 if (hid == NULL || h == NULL) 1817 return (ret); 1818 buf.Pointer = NULL; 1819 buf.Length = ACPI_ALLOCATE_BUFFER; 1820 error = AcpiGetObjectInfo(h, &buf); 1821 if (ACPI_FAILURE(error)) 1822 return (ret); 1823 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1824 1825 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1826 strcmp(hid, devinfo->HardwareId.Value) == 0) 1827 ret = TRUE; 1828 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1829 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1830 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1831 ret = TRUE; 1832 break; 1833 } 1834 } 1835 } 1836 1837 AcpiOsFree(buf.Pointer); 1838 return (ret); 1839 } 1840 1841 /* 1842 * Return the handle of a named object within our scope, ie. that of (parent) 1843 * or one if its parents. 1844 */ 1845 ACPI_STATUS 1846 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1847 { 1848 ACPI_HANDLE r; 1849 ACPI_STATUS status; 1850 1851 /* Walk back up the tree to the root */ 1852 for (;;) { 1853 status = AcpiGetHandle(parent, path, &r); 1854 if (ACPI_SUCCESS(status)) { 1855 *result = r; 1856 return (AE_OK); 1857 } 1858 /* XXX Return error here? */ 1859 if (status != AE_NOT_FOUND) 1860 return (AE_OK); 1861 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1862 return (AE_NOT_FOUND); 1863 parent = r; 1864 } 1865 } 1866 1867 /* Find the difference between two PM tick counts. */ 1868 uint32_t 1869 acpi_TimerDelta(uint32_t end, uint32_t start) 1870 { 1871 uint32_t delta; 1872 1873 if (end >= start) 1874 delta = end - start; 1875 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1876 delta = ((0xFFFFFFFF - start) + end + 1); 1877 else 1878 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1879 return (delta); 1880 } 1881 1882 /* 1883 * Allocate a buffer with a preset data size. 1884 */ 1885 ACPI_BUFFER * 1886 acpi_AllocBuffer(int size) 1887 { 1888 ACPI_BUFFER *buf; 1889 1890 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1891 return (NULL); 1892 buf->Length = size; 1893 buf->Pointer = (void *)(buf + 1); 1894 return (buf); 1895 } 1896 1897 ACPI_STATUS 1898 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1899 { 1900 ACPI_OBJECT arg1; 1901 ACPI_OBJECT_LIST args; 1902 1903 arg1.Type = ACPI_TYPE_INTEGER; 1904 arg1.Integer.Value = number; 1905 args.Count = 1; 1906 args.Pointer = &arg1; 1907 1908 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1909 } 1910 1911 /* 1912 * Evaluate a path that should return an integer. 1913 */ 1914 ACPI_STATUS 1915 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1916 { 1917 ACPI_STATUS status; 1918 ACPI_BUFFER buf; 1919 ACPI_OBJECT param; 1920 1921 if (handle == NULL) 1922 handle = ACPI_ROOT_OBJECT; 1923 1924 /* 1925 * Assume that what we've been pointed at is an Integer object, or 1926 * a method that will return an Integer. 1927 */ 1928 buf.Pointer = ¶m; 1929 buf.Length = sizeof(param); 1930 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1931 if (ACPI_SUCCESS(status)) { 1932 if (param.Type == ACPI_TYPE_INTEGER) 1933 *number = param.Integer.Value; 1934 else 1935 status = AE_TYPE; 1936 } 1937 1938 /* 1939 * In some applications, a method that's expected to return an Integer 1940 * may instead return a Buffer (probably to simplify some internal 1941 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1942 * convert it into an Integer as best we can. 1943 * 1944 * This is a hack. 1945 */ 1946 if (status == AE_BUFFER_OVERFLOW) { 1947 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1948 status = AE_NO_MEMORY; 1949 } else { 1950 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1951 if (ACPI_SUCCESS(status)) 1952 status = acpi_ConvertBufferToInteger(&buf, number); 1953 AcpiOsFree(buf.Pointer); 1954 } 1955 } 1956 return (status); 1957 } 1958 1959 ACPI_STATUS 1960 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1961 { 1962 ACPI_OBJECT *p; 1963 UINT8 *val; 1964 int i; 1965 1966 p = (ACPI_OBJECT *)bufp->Pointer; 1967 if (p->Type == ACPI_TYPE_INTEGER) { 1968 *number = p->Integer.Value; 1969 return (AE_OK); 1970 } 1971 if (p->Type != ACPI_TYPE_BUFFER) 1972 return (AE_TYPE); 1973 if (p->Buffer.Length > sizeof(int)) 1974 return (AE_BAD_DATA); 1975 1976 *number = 0; 1977 val = p->Buffer.Pointer; 1978 for (i = 0; i < p->Buffer.Length; i++) 1979 *number += val[i] << (i * 8); 1980 return (AE_OK); 1981 } 1982 1983 /* 1984 * Iterate over the elements of an a package object, calling the supplied 1985 * function for each element. 1986 * 1987 * XXX possible enhancement might be to abort traversal on error. 1988 */ 1989 ACPI_STATUS 1990 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1991 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1992 { 1993 ACPI_OBJECT *comp; 1994 int i; 1995 1996 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1997 return (AE_BAD_PARAMETER); 1998 1999 /* Iterate over components */ 2000 i = 0; 2001 comp = pkg->Package.Elements; 2002 for (; i < pkg->Package.Count; i++, comp++) 2003 func(comp, arg); 2004 2005 return (AE_OK); 2006 } 2007 2008 /* 2009 * Find the (index)th resource object in a set. 2010 */ 2011 ACPI_STATUS 2012 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2013 { 2014 ACPI_RESOURCE *rp; 2015 int i; 2016 2017 rp = (ACPI_RESOURCE *)buf->Pointer; 2018 i = index; 2019 while (i-- > 0) { 2020 /* Range check */ 2021 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2022 return (AE_BAD_PARAMETER); 2023 2024 /* Check for terminator */ 2025 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2026 return (AE_NOT_FOUND); 2027 rp = ACPI_NEXT_RESOURCE(rp); 2028 } 2029 if (resp != NULL) 2030 *resp = rp; 2031 2032 return (AE_OK); 2033 } 2034 2035 /* 2036 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2037 * 2038 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2039 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2040 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2041 * resources. 2042 */ 2043 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2044 2045 ACPI_STATUS 2046 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2047 { 2048 ACPI_RESOURCE *rp; 2049 void *newp; 2050 2051 /* Initialise the buffer if necessary. */ 2052 if (buf->Pointer == NULL) { 2053 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2054 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2055 return (AE_NO_MEMORY); 2056 rp = (ACPI_RESOURCE *)buf->Pointer; 2057 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2058 rp->Length = 0; 2059 } 2060 if (res == NULL) 2061 return (AE_OK); 2062 2063 /* 2064 * Scan the current buffer looking for the terminator. 2065 * This will either find the terminator or hit the end 2066 * of the buffer and return an error. 2067 */ 2068 rp = (ACPI_RESOURCE *)buf->Pointer; 2069 for (;;) { 2070 /* Range check, don't go outside the buffer */ 2071 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2072 return (AE_BAD_PARAMETER); 2073 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2074 break; 2075 rp = ACPI_NEXT_RESOURCE(rp); 2076 } 2077 2078 /* 2079 * Check the size of the buffer and expand if required. 2080 * 2081 * Required size is: 2082 * size of existing resources before terminator + 2083 * size of new resource and header + 2084 * size of terminator. 2085 * 2086 * Note that this loop should really only run once, unless 2087 * for some reason we are stuffing a *really* huge resource. 2088 */ 2089 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2090 res->Length + ACPI_RS_SIZE_NO_DATA + 2091 ACPI_RS_SIZE_MIN) >= buf->Length) { 2092 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2093 return (AE_NO_MEMORY); 2094 bcopy(buf->Pointer, newp, buf->Length); 2095 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2096 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2097 AcpiOsFree(buf->Pointer); 2098 buf->Pointer = newp; 2099 buf->Length += buf->Length; 2100 } 2101 2102 /* Insert the new resource. */ 2103 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2104 2105 /* And add the terminator. */ 2106 rp = ACPI_NEXT_RESOURCE(rp); 2107 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2108 rp->Length = 0; 2109 2110 return (AE_OK); 2111 } 2112 2113 /* 2114 * Set interrupt model. 2115 */ 2116 ACPI_STATUS 2117 acpi_SetIntrModel(int model) 2118 { 2119 2120 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2121 } 2122 2123 /* 2124 * DEPRECATED. This interface has serious deficiencies and will be 2125 * removed. 2126 * 2127 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2128 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2129 */ 2130 ACPI_STATUS 2131 acpi_SetSleepState(struct acpi_softc *sc, int state) 2132 { 2133 static int once; 2134 2135 if (!once) { 2136 printf( 2137 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2138 once = 1; 2139 } 2140 return (acpi_EnterSleepState(sc, state)); 2141 } 2142 2143 static void 2144 acpi_sleep_force(void *arg) 2145 { 2146 struct acpi_softc *sc; 2147 2148 printf("acpi: suspend request timed out, forcing sleep now\n"); 2149 sc = arg; 2150 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2151 printf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2152 } 2153 2154 /* 2155 * Request that the system enter the given suspend state. All /dev/apm 2156 * devices and devd(8) will be notified. Userland then has a chance to 2157 * save state and acknowledge the request. The system sleeps once all 2158 * acks are in. 2159 */ 2160 int 2161 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2162 { 2163 struct apm_clone_data *clone; 2164 2165 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2166 return (EINVAL); 2167 2168 /* S5 (soft-off) should be entered directly with no waiting. */ 2169 if (state == ACPI_STATE_S5) { 2170 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2171 return (0); 2172 else 2173 return (ENXIO); 2174 } 2175 2176 #if !defined(__i386__) 2177 /* This platform does not support acpi suspend/resume. */ 2178 return (EOPNOTSUPP); 2179 #endif 2180 2181 /* If a suspend request is already in progress, just return. */ 2182 ACPI_LOCK(acpi); 2183 if (sc->acpi_next_sstate != 0) { 2184 ACPI_UNLOCK(acpi); 2185 return (0); 2186 } 2187 2188 /* Record the pending state and notify all apm devices. */ 2189 sc->acpi_next_sstate = state; 2190 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2191 clone->notify_status = APM_EV_NONE; 2192 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2193 selwakeuppri(&clone->sel_read, PZERO); 2194 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2195 } 2196 } 2197 2198 /* If devd(8) is not running, immediately enter the sleep state. */ 2199 if (devctl_process_running() == FALSE) { 2200 ACPI_UNLOCK(acpi); 2201 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2202 return (0); 2203 } else { 2204 return (ENXIO); 2205 } 2206 } 2207 2208 /* Now notify devd(8) also. */ 2209 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2210 2211 /* 2212 * Set a timeout to fire if userland doesn't ack the suspend request 2213 * in time. This way we still eventually go to sleep if we were 2214 * overheating or running low on battery, even if userland is hung. 2215 * We cancel this timeout once all userland acks are in or the 2216 * suspend request is aborted. 2217 */ 2218 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2219 ACPI_UNLOCK(acpi); 2220 return (0); 2221 } 2222 2223 /* 2224 * Acknowledge (or reject) a pending sleep state. The caller has 2225 * prepared for suspend and is now ready for it to proceed. If the 2226 * error argument is non-zero, it indicates suspend should be cancelled 2227 * and gives an errno value describing why. Once all votes are in, 2228 * we suspend the system. 2229 */ 2230 int 2231 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2232 { 2233 struct acpi_softc *sc; 2234 int ret, sleeping; 2235 2236 #if !defined(__i386__) 2237 /* This platform does not support acpi suspend/resume. */ 2238 return (EOPNOTSUPP); 2239 #endif 2240 2241 /* If no pending sleep state, return an error. */ 2242 ACPI_LOCK(acpi); 2243 sc = clone->acpi_sc; 2244 if (sc->acpi_next_sstate == 0) { 2245 ACPI_UNLOCK(acpi); 2246 return (ENXIO); 2247 } 2248 2249 /* Caller wants to abort suspend process. */ 2250 if (error) { 2251 sc->acpi_next_sstate = 0; 2252 callout_stop(&sc->susp_force_to); 2253 printf("acpi: listener on %s cancelled the pending suspend\n", 2254 devtoname(clone->cdev)); 2255 ACPI_UNLOCK(acpi); 2256 return (0); 2257 } 2258 2259 /* 2260 * Mark this device as acking the suspend request. Then, walk through 2261 * all devices, seeing if they agree yet. We only count devices that 2262 * are writable since read-only devices couldn't ack the request. 2263 */ 2264 clone->notify_status = APM_EV_ACKED; 2265 sleeping = TRUE; 2266 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2267 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2268 clone->notify_status != APM_EV_ACKED) { 2269 sleeping = FALSE; 2270 break; 2271 } 2272 } 2273 2274 /* If all devices have voted "yes", we will suspend now. */ 2275 if (sleeping) 2276 callout_stop(&sc->susp_force_to); 2277 ACPI_UNLOCK(acpi); 2278 ret = 0; 2279 if (sleeping) { 2280 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2281 ret = ENODEV; 2282 } 2283 2284 return (ret); 2285 } 2286 2287 static void 2288 acpi_sleep_enable(void *arg) 2289 { 2290 2291 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2292 } 2293 2294 enum acpi_sleep_state { 2295 ACPI_SS_NONE, 2296 ACPI_SS_GPE_SET, 2297 ACPI_SS_DEV_SUSPEND, 2298 ACPI_SS_SLP_PREP, 2299 ACPI_SS_SLEPT, 2300 }; 2301 2302 /* 2303 * Enter the desired system sleep state. 2304 * 2305 * Currently we support S1-S5 but S4 is only S4BIOS 2306 */ 2307 static ACPI_STATUS 2308 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2309 { 2310 ACPI_STATUS status; 2311 UINT8 TypeA; 2312 UINT8 TypeB; 2313 enum acpi_sleep_state slp_state; 2314 2315 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2316 2317 /* Re-entry once we're suspending is not allowed. */ 2318 status = AE_OK; 2319 ACPI_LOCK(acpi); 2320 if (sc->acpi_sleep_disabled) { 2321 ACPI_UNLOCK(acpi); 2322 printf("acpi: suspend request ignored (not ready yet)\n"); 2323 return (AE_ERROR); 2324 } 2325 sc->acpi_sleep_disabled = 1; 2326 ACPI_UNLOCK(acpi); 2327 2328 /* 2329 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2330 * drivers need this. 2331 */ 2332 mtx_lock(&Giant); 2333 slp_state = ACPI_SS_NONE; 2334 switch (state) { 2335 case ACPI_STATE_S1: 2336 case ACPI_STATE_S2: 2337 case ACPI_STATE_S3: 2338 case ACPI_STATE_S4: 2339 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2340 if (status == AE_NOT_FOUND) { 2341 device_printf(sc->acpi_dev, 2342 "Sleep state S%d not supported by BIOS\n", state); 2343 break; 2344 } else if (ACPI_FAILURE(status)) { 2345 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2346 AcpiFormatException(status)); 2347 break; 2348 } 2349 2350 sc->acpi_sstate = state; 2351 2352 /* Enable any GPEs as appropriate and requested by the user. */ 2353 acpi_wake_prep_walk(state); 2354 slp_state = ACPI_SS_GPE_SET; 2355 2356 /* 2357 * Inform all devices that we are going to sleep. If at least one 2358 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2359 * 2360 * XXX Note that a better two-pass approach with a 'veto' pass 2361 * followed by a "real thing" pass would be better, but the current 2362 * bus interface does not provide for this. 2363 */ 2364 if (DEVICE_SUSPEND(root_bus) != 0) { 2365 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2366 break; 2367 } 2368 slp_state = ACPI_SS_DEV_SUSPEND; 2369 2370 /* If testing device suspend only, back out of everything here. */ 2371 if (acpi_susp_bounce) 2372 break; 2373 2374 status = AcpiEnterSleepStatePrep(state); 2375 if (ACPI_FAILURE(status)) { 2376 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2377 AcpiFormatException(status)); 2378 break; 2379 } 2380 slp_state = ACPI_SS_SLP_PREP; 2381 2382 if (sc->acpi_sleep_delay > 0) 2383 DELAY(sc->acpi_sleep_delay * 1000000); 2384 2385 if (state != ACPI_STATE_S1) { 2386 acpi_sleep_machdep(sc, state); 2387 2388 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2389 if (state == ACPI_STATE_S4) 2390 AcpiEnable(); 2391 } else { 2392 ACPI_DISABLE_IRQS(); 2393 status = AcpiEnterSleepState(state); 2394 if (ACPI_FAILURE(status)) { 2395 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2396 AcpiFormatException(status)); 2397 break; 2398 } 2399 } 2400 slp_state = ACPI_SS_SLEPT; 2401 break; 2402 case ACPI_STATE_S5: 2403 /* 2404 * Shut down cleanly and power off. This will call us back through the 2405 * shutdown handlers. 2406 */ 2407 shutdown_nice(RB_POWEROFF); 2408 break; 2409 case ACPI_STATE_S0: 2410 default: 2411 status = AE_BAD_PARAMETER; 2412 break; 2413 } 2414 2415 /* 2416 * Back out state according to how far along we got in the suspend 2417 * process. This handles both the error and success cases. 2418 */ 2419 sc->acpi_next_sstate = 0; 2420 if (slp_state >= ACPI_SS_GPE_SET) { 2421 acpi_wake_prep_walk(state); 2422 sc->acpi_sstate = ACPI_STATE_S0; 2423 } 2424 if (slp_state >= ACPI_SS_SLP_PREP) 2425 AcpiLeaveSleepState(state); 2426 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2427 DEVICE_RESUME(root_bus); 2428 if (slp_state >= ACPI_SS_SLEPT) 2429 acpi_enable_fixed_events(sc); 2430 2431 /* Allow another sleep request after a while. */ 2432 if (state != ACPI_STATE_S5) 2433 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2434 2435 /* Run /etc/rc.resume after we are back. */ 2436 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2437 2438 mtx_unlock(&Giant); 2439 return_ACPI_STATUS (status); 2440 } 2441 2442 /* Initialize a device's wake GPE. */ 2443 int 2444 acpi_wake_init(device_t dev, int type) 2445 { 2446 struct acpi_prw_data prw; 2447 2448 /* Evaluate _PRW to find the GPE. */ 2449 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2450 return (ENXIO); 2451 2452 /* Set the requested type for the GPE (runtime, wake, or both). */ 2453 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2454 device_printf(dev, "set GPE type failed\n"); 2455 return (ENXIO); 2456 } 2457 2458 return (0); 2459 } 2460 2461 /* Enable or disable the device's wake GPE. */ 2462 int 2463 acpi_wake_set_enable(device_t dev, int enable) 2464 { 2465 struct acpi_prw_data prw; 2466 ACPI_STATUS status; 2467 int flags; 2468 2469 /* Make sure the device supports waking the system and get the GPE. */ 2470 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2471 return (ENXIO); 2472 2473 flags = acpi_get_flags(dev); 2474 if (enable) { 2475 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2476 if (ACPI_FAILURE(status)) { 2477 device_printf(dev, "enable wake failed\n"); 2478 return (ENXIO); 2479 } 2480 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2481 } else { 2482 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2483 if (ACPI_FAILURE(status)) { 2484 device_printf(dev, "disable wake failed\n"); 2485 return (ENXIO); 2486 } 2487 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2488 } 2489 2490 return (0); 2491 } 2492 2493 static int 2494 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2495 { 2496 struct acpi_prw_data prw; 2497 device_t dev; 2498 2499 /* Check that this is a wake-capable device and get its GPE. */ 2500 if (acpi_parse_prw(handle, &prw) != 0) 2501 return (ENXIO); 2502 dev = acpi_get_device(handle); 2503 2504 /* 2505 * The destination sleep state must be less than (i.e., higher power) 2506 * or equal to the value specified by _PRW. If this GPE cannot be 2507 * enabled for the next sleep state, then disable it. If it can and 2508 * the user requested it be enabled, turn on any required power resources 2509 * and set _PSW. 2510 */ 2511 if (sstate > prw.lowest_wake) { 2512 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2513 if (bootverbose) 2514 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2515 acpi_name(handle), sstate); 2516 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2517 acpi_pwr_wake_enable(handle, 1); 2518 acpi_SetInteger(handle, "_PSW", 1); 2519 if (bootverbose) 2520 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2521 acpi_name(handle), sstate); 2522 } 2523 2524 return (0); 2525 } 2526 2527 static int 2528 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2529 { 2530 struct acpi_prw_data prw; 2531 device_t dev; 2532 2533 /* 2534 * Check that this is a wake-capable device and get its GPE. Return 2535 * now if the user didn't enable this device for wake. 2536 */ 2537 if (acpi_parse_prw(handle, &prw) != 0) 2538 return (ENXIO); 2539 dev = acpi_get_device(handle); 2540 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2541 return (0); 2542 2543 /* 2544 * If this GPE couldn't be enabled for the previous sleep state, it was 2545 * disabled before going to sleep so re-enable it. If it was enabled, 2546 * clear _PSW and turn off any power resources it used. 2547 */ 2548 if (sstate > prw.lowest_wake) { 2549 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2550 if (bootverbose) 2551 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2552 } else { 2553 acpi_SetInteger(handle, "_PSW", 0); 2554 acpi_pwr_wake_enable(handle, 0); 2555 if (bootverbose) 2556 device_printf(dev, "run_prep cleaned up for %s\n", 2557 acpi_name(handle)); 2558 } 2559 2560 return (0); 2561 } 2562 2563 static ACPI_STATUS 2564 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2565 { 2566 int sstate; 2567 2568 /* If suspending, run the sleep prep function, otherwise wake. */ 2569 sstate = *(int *)context; 2570 if (AcpiGbl_SystemAwakeAndRunning) 2571 acpi_wake_sleep_prep(handle, sstate); 2572 else 2573 acpi_wake_run_prep(handle, sstate); 2574 return (AE_OK); 2575 } 2576 2577 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2578 static int 2579 acpi_wake_prep_walk(int sstate) 2580 { 2581 ACPI_HANDLE sb_handle; 2582 2583 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2584 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2585 acpi_wake_prep, &sstate, NULL); 2586 return (0); 2587 } 2588 2589 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2590 static int 2591 acpi_wake_sysctl_walk(device_t dev) 2592 { 2593 int error, i, numdevs; 2594 device_t *devlist; 2595 device_t child; 2596 ACPI_STATUS status; 2597 2598 error = device_get_children(dev, &devlist, &numdevs); 2599 if (error != 0 || numdevs == 0) { 2600 if (numdevs == 0) 2601 free(devlist, M_TEMP); 2602 return (error); 2603 } 2604 for (i = 0; i < numdevs; i++) { 2605 child = devlist[i]; 2606 acpi_wake_sysctl_walk(child); 2607 if (!device_is_attached(child)) 2608 continue; 2609 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2610 if (ACPI_SUCCESS(status)) { 2611 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2612 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2613 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2614 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2615 } 2616 } 2617 free(devlist, M_TEMP); 2618 2619 return (0); 2620 } 2621 2622 /* Enable or disable wake from userland. */ 2623 static int 2624 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2625 { 2626 int enable, error; 2627 device_t dev; 2628 2629 dev = (device_t)arg1; 2630 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2631 2632 error = sysctl_handle_int(oidp, &enable, 0, req); 2633 if (error != 0 || req->newptr == NULL) 2634 return (error); 2635 if (enable != 0 && enable != 1) 2636 return (EINVAL); 2637 2638 return (acpi_wake_set_enable(dev, enable)); 2639 } 2640 2641 /* Parse a device's _PRW into a structure. */ 2642 int 2643 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2644 { 2645 ACPI_STATUS status; 2646 ACPI_BUFFER prw_buffer; 2647 ACPI_OBJECT *res, *res2; 2648 int error, i, power_count; 2649 2650 if (h == NULL || prw == NULL) 2651 return (EINVAL); 2652 2653 /* 2654 * The _PRW object (7.2.9) is only required for devices that have the 2655 * ability to wake the system from a sleeping state. 2656 */ 2657 error = EINVAL; 2658 prw_buffer.Pointer = NULL; 2659 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2660 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2661 if (ACPI_FAILURE(status)) 2662 return (ENOENT); 2663 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2664 if (res == NULL) 2665 return (ENOENT); 2666 if (!ACPI_PKG_VALID(res, 2)) 2667 goto out; 2668 2669 /* 2670 * Element 1 of the _PRW object: 2671 * The lowest power system sleeping state that can be entered while still 2672 * providing wake functionality. The sleeping state being entered must 2673 * be less than (i.e., higher power) or equal to this value. 2674 */ 2675 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2676 goto out; 2677 2678 /* 2679 * Element 0 of the _PRW object: 2680 */ 2681 switch (res->Package.Elements[0].Type) { 2682 case ACPI_TYPE_INTEGER: 2683 /* 2684 * If the data type of this package element is numeric, then this 2685 * _PRW package element is the bit index in the GPEx_EN, in the 2686 * GPE blocks described in the FADT, of the enable bit that is 2687 * enabled for the wake event. 2688 */ 2689 prw->gpe_handle = NULL; 2690 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2691 error = 0; 2692 break; 2693 case ACPI_TYPE_PACKAGE: 2694 /* 2695 * If the data type of this package element is a package, then this 2696 * _PRW package element is itself a package containing two 2697 * elements. The first is an object reference to the GPE Block 2698 * device that contains the GPE that will be triggered by the wake 2699 * event. The second element is numeric and it contains the bit 2700 * index in the GPEx_EN, in the GPE Block referenced by the 2701 * first element in the package, of the enable bit that is enabled for 2702 * the wake event. 2703 * 2704 * For example, if this field is a package then it is of the form: 2705 * Package() {\_SB.PCI0.ISA.GPE, 2} 2706 */ 2707 res2 = &res->Package.Elements[0]; 2708 if (!ACPI_PKG_VALID(res2, 2)) 2709 goto out; 2710 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2711 if (prw->gpe_handle == NULL) 2712 goto out; 2713 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2714 goto out; 2715 error = 0; 2716 break; 2717 default: 2718 goto out; 2719 } 2720 2721 /* Elements 2 to N of the _PRW object are power resources. */ 2722 power_count = res->Package.Count - 2; 2723 if (power_count > ACPI_PRW_MAX_POWERRES) { 2724 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2725 power_count = 0; 2726 } 2727 prw->power_res_count = power_count; 2728 for (i = 0; i < power_count; i++) 2729 prw->power_res[i] = res->Package.Elements[i]; 2730 2731 out: 2732 if (prw_buffer.Pointer != NULL) 2733 AcpiOsFree(prw_buffer.Pointer); 2734 return (error); 2735 } 2736 2737 /* 2738 * ACPI Event Handlers 2739 */ 2740 2741 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2742 2743 static void 2744 acpi_system_eventhandler_sleep(void *arg, int state) 2745 { 2746 int ret; 2747 2748 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2749 2750 /* Check if button action is disabled. */ 2751 if (state == ACPI_S_STATES_MAX + 1) 2752 return; 2753 2754 /* Request that the system prepare to enter the given suspend state. */ 2755 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2756 if (ret != 0) 2757 printf("acpi: request to enter state S%d failed (err %d)\n", 2758 state, ret); 2759 2760 return_VOID; 2761 } 2762 2763 static void 2764 acpi_system_eventhandler_wakeup(void *arg, int state) 2765 { 2766 2767 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2768 2769 /* Currently, nothing to do for wakeup. */ 2770 2771 return_VOID; 2772 } 2773 2774 /* 2775 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2776 */ 2777 UINT32 2778 acpi_event_power_button_sleep(void *context) 2779 { 2780 struct acpi_softc *sc = (struct acpi_softc *)context; 2781 2782 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2783 2784 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2785 2786 return_VALUE (ACPI_INTERRUPT_HANDLED); 2787 } 2788 2789 UINT32 2790 acpi_event_power_button_wake(void *context) 2791 { 2792 struct acpi_softc *sc = (struct acpi_softc *)context; 2793 2794 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2795 2796 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2797 2798 return_VALUE (ACPI_INTERRUPT_HANDLED); 2799 } 2800 2801 UINT32 2802 acpi_event_sleep_button_sleep(void *context) 2803 { 2804 struct acpi_softc *sc = (struct acpi_softc *)context; 2805 2806 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2807 2808 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2809 2810 return_VALUE (ACPI_INTERRUPT_HANDLED); 2811 } 2812 2813 UINT32 2814 acpi_event_sleep_button_wake(void *context) 2815 { 2816 struct acpi_softc *sc = (struct acpi_softc *)context; 2817 2818 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2819 2820 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2821 2822 return_VALUE (ACPI_INTERRUPT_HANDLED); 2823 } 2824 2825 /* 2826 * XXX This static buffer is suboptimal. There is no locking so only 2827 * use this for single-threaded callers. 2828 */ 2829 char * 2830 acpi_name(ACPI_HANDLE handle) 2831 { 2832 ACPI_BUFFER buf; 2833 static char data[256]; 2834 2835 buf.Length = sizeof(data); 2836 buf.Pointer = data; 2837 2838 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2839 return (data); 2840 return ("(unknown)"); 2841 } 2842 2843 /* 2844 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2845 * parts of the namespace. 2846 */ 2847 int 2848 acpi_avoid(ACPI_HANDLE handle) 2849 { 2850 char *cp, *env, *np; 2851 int len; 2852 2853 np = acpi_name(handle); 2854 if (*np == '\\') 2855 np++; 2856 if ((env = getenv("debug.acpi.avoid")) == NULL) 2857 return (0); 2858 2859 /* Scan the avoid list checking for a match */ 2860 cp = env; 2861 for (;;) { 2862 while (*cp != 0 && isspace(*cp)) 2863 cp++; 2864 if (*cp == 0) 2865 break; 2866 len = 0; 2867 while (cp[len] != 0 && !isspace(cp[len])) 2868 len++; 2869 if (!strncmp(cp, np, len)) { 2870 freeenv(env); 2871 return(1); 2872 } 2873 cp += len; 2874 } 2875 freeenv(env); 2876 2877 return (0); 2878 } 2879 2880 /* 2881 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2882 */ 2883 int 2884 acpi_disabled(char *subsys) 2885 { 2886 char *cp, *env; 2887 int len; 2888 2889 if ((env = getenv("debug.acpi.disabled")) == NULL) 2890 return (0); 2891 if (strcmp(env, "all") == 0) { 2892 freeenv(env); 2893 return (1); 2894 } 2895 2896 /* Scan the disable list, checking for a match. */ 2897 cp = env; 2898 for (;;) { 2899 while (*cp != '\0' && isspace(*cp)) 2900 cp++; 2901 if (*cp == '\0') 2902 break; 2903 len = 0; 2904 while (cp[len] != '\0' && !isspace(cp[len])) 2905 len++; 2906 if (strncmp(cp, subsys, len) == 0) { 2907 freeenv(env); 2908 return (1); 2909 } 2910 cp += len; 2911 } 2912 freeenv(env); 2913 2914 return (0); 2915 } 2916 2917 /* 2918 * Control interface. 2919 * 2920 * We multiplex ioctls for all participating ACPI devices here. Individual 2921 * drivers wanting to be accessible via /dev/acpi should use the 2922 * register/deregister interface to make their handlers visible. 2923 */ 2924 struct acpi_ioctl_hook 2925 { 2926 TAILQ_ENTRY(acpi_ioctl_hook) link; 2927 u_long cmd; 2928 acpi_ioctl_fn fn; 2929 void *arg; 2930 }; 2931 2932 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2933 static int acpi_ioctl_hooks_initted; 2934 2935 int 2936 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2937 { 2938 struct acpi_ioctl_hook *hp; 2939 2940 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2941 return (ENOMEM); 2942 hp->cmd = cmd; 2943 hp->fn = fn; 2944 hp->arg = arg; 2945 2946 ACPI_LOCK(acpi); 2947 if (acpi_ioctl_hooks_initted == 0) { 2948 TAILQ_INIT(&acpi_ioctl_hooks); 2949 acpi_ioctl_hooks_initted = 1; 2950 } 2951 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2952 ACPI_UNLOCK(acpi); 2953 2954 return (0); 2955 } 2956 2957 void 2958 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2959 { 2960 struct acpi_ioctl_hook *hp; 2961 2962 ACPI_LOCK(acpi); 2963 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2964 if (hp->cmd == cmd && hp->fn == fn) 2965 break; 2966 2967 if (hp != NULL) { 2968 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2969 free(hp, M_ACPIDEV); 2970 } 2971 ACPI_UNLOCK(acpi); 2972 } 2973 2974 static int 2975 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2976 { 2977 return (0); 2978 } 2979 2980 static int 2981 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2982 { 2983 return (0); 2984 } 2985 2986 static int 2987 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2988 { 2989 struct acpi_softc *sc; 2990 struct acpi_ioctl_hook *hp; 2991 int error, state; 2992 2993 error = 0; 2994 hp = NULL; 2995 sc = dev->si_drv1; 2996 2997 /* 2998 * Scan the list of registered ioctls, looking for handlers. 2999 */ 3000 ACPI_LOCK(acpi); 3001 if (acpi_ioctl_hooks_initted) 3002 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3003 if (hp->cmd == cmd) 3004 break; 3005 } 3006 ACPI_UNLOCK(acpi); 3007 if (hp) 3008 return (hp->fn(cmd, addr, hp->arg)); 3009 3010 /* 3011 * Core ioctls are not permitted for non-writable user. 3012 * Currently, other ioctls just fetch information. 3013 * Not changing system behavior. 3014 */ 3015 if ((flag & FWRITE) == 0) 3016 return (EPERM); 3017 3018 /* Core system ioctls. */ 3019 switch (cmd) { 3020 case ACPIIO_REQSLPSTATE: 3021 state = *(int *)addr; 3022 if (state != ACPI_STATE_S5) 3023 error = acpi_ReqSleepState(sc, state); 3024 else { 3025 printf("power off via acpi ioctl not supported\n"); 3026 error = ENXIO; 3027 } 3028 break; 3029 case ACPIIO_ACKSLPSTATE: 3030 error = *(int *)addr; 3031 error = acpi_AckSleepState(sc->acpi_clone, error); 3032 break; 3033 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3034 error = EINVAL; 3035 state = *(int *)addr; 3036 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3037 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3038 error = 0; 3039 break; 3040 default: 3041 error = ENXIO; 3042 break; 3043 } 3044 3045 return (error); 3046 } 3047 3048 static int 3049 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3050 { 3051 int error; 3052 struct sbuf sb; 3053 UINT8 state, TypeA, TypeB; 3054 3055 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3056 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3057 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3058 sbuf_printf(&sb, "S%d ", state); 3059 sbuf_trim(&sb); 3060 sbuf_finish(&sb); 3061 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3062 sbuf_delete(&sb); 3063 return (error); 3064 } 3065 3066 static int 3067 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3068 { 3069 char sleep_state[10]; 3070 int error; 3071 u_int new_state, old_state; 3072 3073 old_state = *(u_int *)oidp->oid_arg1; 3074 if (old_state > ACPI_S_STATES_MAX + 1) 3075 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3076 else 3077 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3078 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3079 if (error == 0 && req->newptr != NULL) { 3080 new_state = ACPI_STATE_S0; 3081 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3082 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3083 break; 3084 if (new_state <= ACPI_S_STATES_MAX + 1) { 3085 if (new_state != old_state) 3086 *(u_int *)oidp->oid_arg1 = new_state; 3087 } else 3088 error = EINVAL; 3089 } 3090 3091 return (error); 3092 } 3093 3094 /* Inform devctl(4) when we receive a Notify. */ 3095 void 3096 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3097 { 3098 char notify_buf[16]; 3099 ACPI_BUFFER handle_buf; 3100 ACPI_STATUS status; 3101 3102 if (subsystem == NULL) 3103 return; 3104 3105 handle_buf.Pointer = NULL; 3106 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3107 status = AcpiNsHandleToPathname(h, &handle_buf); 3108 if (ACPI_FAILURE(status)) 3109 return; 3110 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3111 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3112 AcpiOsFree(handle_buf.Pointer); 3113 } 3114 3115 #ifdef ACPI_DEBUG 3116 /* 3117 * Support for parsing debug options from the kernel environment. 3118 * 3119 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3120 * by specifying the names of the bits in the debug.acpi.layer and 3121 * debug.acpi.level environment variables. Bits may be unset by 3122 * prefixing the bit name with !. 3123 */ 3124 struct debugtag 3125 { 3126 char *name; 3127 UINT32 value; 3128 }; 3129 3130 static struct debugtag dbg_layer[] = { 3131 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3132 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3133 {"ACPI_EVENTS", ACPI_EVENTS}, 3134 {"ACPI_TABLES", ACPI_TABLES}, 3135 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3136 {"ACPI_PARSER", ACPI_PARSER}, 3137 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3138 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3139 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3140 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3141 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3142 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3143 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3144 3145 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3146 {"ACPI_BATTERY", ACPI_BATTERY}, 3147 {"ACPI_BUS", ACPI_BUS}, 3148 {"ACPI_BUTTON", ACPI_BUTTON}, 3149 {"ACPI_EC", ACPI_EC}, 3150 {"ACPI_FAN", ACPI_FAN}, 3151 {"ACPI_POWERRES", ACPI_POWERRES}, 3152 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3153 {"ACPI_THERMAL", ACPI_THERMAL}, 3154 {"ACPI_TIMER", ACPI_TIMER}, 3155 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3156 {NULL, 0} 3157 }; 3158 3159 static struct debugtag dbg_level[] = { 3160 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 3161 {"ACPI_LV_WARN", ACPI_LV_WARN}, 3162 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3163 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3164 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3165 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3166 3167 /* Trace verbosity level 1 [Standard Trace Level] */ 3168 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3169 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3170 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3171 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3172 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3173 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3174 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3175 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3176 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3177 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3178 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3179 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3180 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3181 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3182 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3183 3184 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3185 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3186 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3187 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3188 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3189 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3190 3191 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3192 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3193 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3194 {"ACPI_LV_IO", ACPI_LV_IO}, 3195 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3196 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3197 3198 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3199 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3200 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3201 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3202 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3203 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3204 {NULL, 0} 3205 }; 3206 3207 static void 3208 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3209 { 3210 char *ep; 3211 int i, l; 3212 int set; 3213 3214 while (*cp) { 3215 if (isspace(*cp)) { 3216 cp++; 3217 continue; 3218 } 3219 ep = cp; 3220 while (*ep && !isspace(*ep)) 3221 ep++; 3222 if (*cp == '!') { 3223 set = 0; 3224 cp++; 3225 if (cp == ep) 3226 continue; 3227 } else { 3228 set = 1; 3229 } 3230 l = ep - cp; 3231 for (i = 0; tag[i].name != NULL; i++) { 3232 if (!strncmp(cp, tag[i].name, l)) { 3233 if (set) 3234 *flag |= tag[i].value; 3235 else 3236 *flag &= ~tag[i].value; 3237 } 3238 } 3239 cp = ep; 3240 } 3241 } 3242 3243 static void 3244 acpi_set_debugging(void *junk) 3245 { 3246 char *layer, *level; 3247 3248 if (cold) { 3249 AcpiDbgLayer = 0; 3250 AcpiDbgLevel = 0; 3251 } 3252 3253 layer = getenv("debug.acpi.layer"); 3254 level = getenv("debug.acpi.level"); 3255 if (layer == NULL && level == NULL) 3256 return; 3257 3258 printf("ACPI set debug"); 3259 if (layer != NULL) { 3260 if (strcmp("NONE", layer) != 0) 3261 printf(" layer '%s'", layer); 3262 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3263 freeenv(layer); 3264 } 3265 if (level != NULL) { 3266 if (strcmp("NONE", level) != 0) 3267 printf(" level '%s'", level); 3268 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3269 freeenv(level); 3270 } 3271 printf("\n"); 3272 } 3273 3274 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3275 NULL); 3276 3277 static int 3278 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3279 { 3280 int error, *dbg; 3281 struct debugtag *tag; 3282 struct sbuf sb; 3283 3284 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3285 return (ENOMEM); 3286 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3287 tag = &dbg_layer[0]; 3288 dbg = &AcpiDbgLayer; 3289 } else { 3290 tag = &dbg_level[0]; 3291 dbg = &AcpiDbgLevel; 3292 } 3293 3294 /* Get old values if this is a get request. */ 3295 ACPI_SERIAL_BEGIN(acpi); 3296 if (*dbg == 0) { 3297 sbuf_cpy(&sb, "NONE"); 3298 } else if (req->newptr == NULL) { 3299 for (; tag->name != NULL; tag++) { 3300 if ((*dbg & tag->value) == tag->value) 3301 sbuf_printf(&sb, "%s ", tag->name); 3302 } 3303 } 3304 sbuf_trim(&sb); 3305 sbuf_finish(&sb); 3306 3307 /* Copy out the old values to the user. */ 3308 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3309 sbuf_delete(&sb); 3310 3311 /* If the user is setting a string, parse it. */ 3312 if (error == 0 && req->newptr != NULL) { 3313 *dbg = 0; 3314 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3315 acpi_set_debugging(NULL); 3316 } 3317 ACPI_SERIAL_END(acpi); 3318 3319 return (error); 3320 } 3321 3322 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3323 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3324 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3325 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3326 #endif /* ACPI_DEBUG */ 3327 3328 static int 3329 acpi_pm_func(u_long cmd, void *arg, ...) 3330 { 3331 int state, acpi_state; 3332 int error; 3333 struct acpi_softc *sc; 3334 va_list ap; 3335 3336 error = 0; 3337 switch (cmd) { 3338 case POWER_CMD_SUSPEND: 3339 sc = (struct acpi_softc *)arg; 3340 if (sc == NULL) { 3341 error = EINVAL; 3342 goto out; 3343 } 3344 3345 va_start(ap, arg); 3346 state = va_arg(ap, int); 3347 va_end(ap); 3348 3349 switch (state) { 3350 case POWER_SLEEP_STATE_STANDBY: 3351 acpi_state = sc->acpi_standby_sx; 3352 break; 3353 case POWER_SLEEP_STATE_SUSPEND: 3354 acpi_state = sc->acpi_suspend_sx; 3355 break; 3356 case POWER_SLEEP_STATE_HIBERNATE: 3357 acpi_state = ACPI_STATE_S4; 3358 break; 3359 default: 3360 error = EINVAL; 3361 goto out; 3362 } 3363 3364 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3365 error = ENXIO; 3366 break; 3367 default: 3368 error = EINVAL; 3369 goto out; 3370 } 3371 3372 out: 3373 return (error); 3374 } 3375 3376 static void 3377 acpi_pm_register(void *arg) 3378 { 3379 if (!cold || resource_disabled("acpi", 0)) 3380 return; 3381 3382 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3383 } 3384 3385 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3386