1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.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 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/device.h> 48 #include <sys/spinlock.h> 49 #include <sys/spinlock2.h> 50 #include <sys/uuid.h> 51 52 #include <sys/rman.h> 53 #include <bus/isa/isavar.h> 54 #include <bus/isa/pnpvar.h> 55 56 #include "acpi.h" 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 #include <dev/acpica/acpiio_mcall.h> 60 #include "achware.h" 61 #include "acnamesp.h" 62 #include "acglobal.h" 63 64 #include "pci_if.h" 65 #include <bus/pci/pci_cfgreg.h> 66 #include <bus/pci/pcivar.h> 67 #include <bus/pci/pci_private.h> 68 69 #include <vm/vm_param.h> 70 71 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPICA debugging infrastructure */ 74 #define _COMPONENT ACPI_BUS 75 ACPI_MODULE_NAME("ACPI"); 76 77 static d_open_t acpiopen; 78 static d_close_t acpiclose; 79 static d_ioctl_t acpiioctl; 80 81 static struct dev_ops acpi_ops = { 82 { "acpi", 0, D_MPSAFE }, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl 86 }; 87 88 struct acpi_interface { 89 ACPI_STRING *data; 90 int num; 91 }; 92 93 /* Global mutex for locking access to the ACPI subsystem. */ 94 struct lock acpi_lock; 95 struct lwkt_token acpi_token = LWKT_TOKEN_INITIALIZER(acpi_token); 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 static int acpi_modevent(struct module *mod, int event, void *junk); 101 static void acpi_identify(driver_t *driver, device_t parent); 102 static int acpi_probe(device_t dev); 103 static int acpi_attach(device_t dev); 104 static int acpi_suspend(device_t dev); 105 static int acpi_resume(device_t dev); 106 static int acpi_shutdown(device_t dev); 107 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 108 int unit); 109 static int acpi_print_child(device_t bus, device_t child); 110 static void acpi_probe_nomatch(device_t bus, device_t child); 111 static void acpi_driver_added(device_t dev, driver_t *driver); 112 static int acpi_read_ivar(device_t dev, device_t child, int index, 113 uintptr_t *result); 114 static int acpi_write_ivar(device_t dev, device_t child, int index, 115 uintptr_t value); 116 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 117 static int acpi_sysres_alloc(device_t dev); 118 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 119 int type, int *rid, u_long start, u_long end, 120 u_long count, u_int flags, int cpuid); 121 static int acpi_release_resource(device_t bus, device_t child, int type, 122 int rid, struct resource *r); 123 static void acpi_delete_resource(device_t bus, device_t child, int type, 124 int rid); 125 static uint32_t acpi_isa_get_logicalid(device_t dev); 126 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 127 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 128 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 129 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 130 ACPI_BUFFER *ret); 131 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 132 int *dstate); 133 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 134 void *context, void **retval); 135 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 136 int max_depth, acpi_scan_cb_t user_fn, void *arg); 137 static int acpi_set_powerstate_method(device_t bus, device_t child, 138 int state); 139 static int acpi_isa_pnp_probe(device_t bus, device_t child, 140 struct isa_pnp_id *ids); 141 static void acpi_probe_children(device_t bus); 142 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 143 static void acpi_disable_not_present(device_t child); 144 static void acpi_reprobe_children(device_t bus, device_t *children, 145 int cnt); 146 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 147 void *context, void **status); 148 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 149 static void acpi_shutdown_final(void *arg, int howto); 150 static void acpi_enable_fixed_events(struct acpi_softc *sc); 151 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 152 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 153 static int acpi_wake_prep_walk(int sstate); 154 static int acpi_wake_sysctl_walk(device_t dev); 155 #ifdef notyet 156 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 157 #endif 158 static void acpi_system_eventhandler_sleep(void *arg, int state); 159 static void acpi_system_eventhandler_wakeup(void *arg, int state); 160 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 161 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 162 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 163 static int acpi_pm_func(u_long cmd, void *arg, ...); 164 static int acpi_child_location_str_method(device_t acdev, device_t child, 165 char *buf, size_t buflen); 166 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 167 char *buf, size_t buflen); 168 static void acpi_enable_pcie(void); 169 static void acpi_reset_interfaces(device_t dev); 170 171 static device_method_t acpi_methods[] = { 172 /* Device interface */ 173 DEVMETHOD(device_identify, acpi_identify), 174 DEVMETHOD(device_probe, acpi_probe), 175 DEVMETHOD(device_attach, acpi_attach), 176 DEVMETHOD(device_shutdown, acpi_shutdown), 177 DEVMETHOD(device_detach, bus_generic_detach), 178 DEVMETHOD(device_suspend, acpi_suspend), 179 DEVMETHOD(device_resume, acpi_resume), 180 181 /* Bus interface */ 182 DEVMETHOD(bus_add_child, acpi_add_child), 183 DEVMETHOD(bus_print_child, acpi_print_child), 184 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 185 DEVMETHOD(bus_driver_added, acpi_driver_added), 186 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 187 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 188 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 189 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 190 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 191 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 192 DEVMETHOD(bus_release_resource, acpi_release_resource), 193 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 194 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 195 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 196 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 197 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 198 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 199 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 200 201 /* ACPI bus */ 202 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 203 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 204 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 205 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 206 207 /* PCI emulation */ 208 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 209 210 /* ISA emulation */ 211 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 212 213 DEVMETHOD_END 214 }; 215 216 static driver_t acpi_driver = { 217 "acpi", 218 acpi_methods, 219 sizeof(struct acpi_softc), 220 .gpri = KOBJ_GPRI_ACPI+2 221 }; 222 223 static devclass_t acpi_devclass; 224 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 225 MODULE_VERSION(acpi, 1); 226 227 ACPI_SERIAL_DECL(acpi, "ACPI serializer"); 228 229 /* Local pools for managing system resources for ACPI child devices. */ 230 static struct rman acpi_rman_io, acpi_rman_mem; 231 232 #define ACPI_MINIMUM_AWAKETIME 5 233 234 static const char* sleep_state_names[] = { 235 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 236 237 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 238 static char acpi_ca_version[12]; 239 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 240 acpi_ca_version, 0, "Version of Intel ACPICA"); 241 242 /* 243 * Allow overriding _OSI methods. 244 */ 245 static char acpi_install_interface[256]; 246 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 247 sizeof(acpi_install_interface)); 248 static char acpi_remove_interface[256]; 249 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 250 sizeof(acpi_remove_interface)); 251 252 /* 253 * Use this tunable to disable the control method auto-serialization 254 * mechanism that was added in 20140214 and superseded the previous 255 * AcpiGbl_SerializeAllMethods global. 256 */ 257 static int acpi_auto_serialize_methods = 1; 258 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 259 260 /* Allow users to dump Debug objects without ACPI debugger. */ 261 static int acpi_debug_objects; 262 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 263 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 264 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 265 "Enable Debug objects."); 266 267 /* Allow ignoring the XSDT. */ 268 static int acpi_ignore_xsdt; 269 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt); 270 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD, 271 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT."); 272 273 /* Allow the interpreter to ignore common mistakes in BIOS. */ 274 static int acpi_interpreter_slack = 1; 275 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 276 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 277 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 278 279 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */ 280 static int acpi_fadt_addr32; 281 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32); 282 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD, 283 &acpi_fadt_addr32, 1, 284 "Prefer 32-bit FADT register addresses over 64-bit ones."); 285 286 /* Prefer 32-bit FACS table addresses over the 64-bit ones. */ 287 static int acpi_facs_addr32 = 1; 288 TUNABLE_INT("debug.acpi.facs_addr32", &acpi_facs_addr32); 289 SYSCTL_INT(_debug_acpi, OID_AUTO, facs_addr32, CTLFLAG_RD, 290 &acpi_facs_addr32, 1, 291 "Prefer 32-bit FACS table addresses over 64-bit ones."); 292 293 static int acpi_group_module_level_code; 294 TUNABLE_INT("debug.acpi.group_module_level_code", &acpi_group_module_level_code); 295 SYSCTL_INT(_debug_acpi, OID_AUTO, group_module_level_code, CTLFLAG_RD, 296 &acpi_group_module_level_code, 1, 297 "Group module-level code."); 298 299 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 300 static int acpi_do_powerstate = 1; 301 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 302 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 303 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 304 305 /* Allow users to override quirks. */ 306 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 307 308 /* Allow to call ACPI methods from userland. */ 309 static int acpi_allow_mcall; 310 TUNABLE_INT("debug.acpi.allow_method_calls", &acpi_allow_mcall); 311 312 static int acpi_susp_bounce; 313 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 314 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 315 316 /* 317 * ACPI can only be loaded as a module by the loader; activating it after 318 * system bootstrap time is not useful, and can be fatal to the system. 319 * It also cannot be unloaded, since the entire system bus heirarchy hangs 320 * off it. 321 */ 322 static int 323 acpi_modevent(struct module *mod, int event, void *junk) 324 { 325 switch (event) { 326 case MOD_LOAD: 327 if (!cold) { 328 kprintf("The ACPI driver cannot be loaded after boot.\n"); 329 return (EPERM); 330 } 331 break; 332 case MOD_UNLOAD: 333 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 334 return (EBUSY); 335 break; 336 default: 337 break; 338 } 339 return (0); 340 } 341 342 /* 343 * Perform early initialization. 344 */ 345 ACPI_STATUS 346 acpi_Startup(void) 347 { 348 static int started = 0; 349 ACPI_STATUS status; 350 int val; 351 352 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 353 354 /* Only run the startup code once. The MADT driver also calls this. */ 355 if (started) 356 return_VALUE (AE_OK); 357 started = 1; 358 359 /* Start up the ACPICA subsystem. */ 360 status = AcpiInitializeSubsystem(); 361 if (ACPI_FAILURE(status)) { 362 kprintf("ACPI: Subsystem initialization failed: %s\n", 363 AcpiFormatException(status)); 364 return_VALUE (status); 365 } 366 367 /* 368 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 369 * if more tables exist. 370 */ 371 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 372 kprintf("ACPI: Table initialization failed: %s\n", 373 AcpiFormatException(status)); 374 return_VALUE (status); 375 } 376 377 /* Set up any quirks we have for this system. */ 378 if (acpi_quirks == ACPI_Q_OK) 379 acpi_table_quirks(&acpi_quirks); 380 381 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 382 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 383 acpi_quirks &= ~ACPI_Q_BROKEN; 384 if (acpi_quirks & ACPI_Q_BROKEN) { 385 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 386 status = AE_SUPPORT; 387 } 388 389 return_VALUE (status); 390 } 391 392 /* 393 * Detect ACPI, perform early initialisation 394 */ 395 static void 396 acpi_identify(driver_t *driver, device_t parent) 397 { 398 device_t child; 399 400 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 401 402 if (!cold) 403 return_VOID; 404 405 /* Check that we haven't been disabled with a hint. */ 406 if (resource_disabled("acpi", 0)) 407 return_VOID; 408 409 /* Make sure we're not being doubly invoked. */ 410 if (device_find_child(parent, "acpi", 0) != NULL) 411 return_VOID; 412 413 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 414 415 /* Initialize root tables. */ 416 if (ACPI_FAILURE(acpi_Startup())) { 417 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 418 return_VOID; 419 } 420 421 /* Attach the actual ACPI device. */ 422 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 423 device_printf(parent, "device_identify failed\n"); 424 return_VOID; 425 } 426 } 427 428 /* 429 * Fetch some descriptive data from ACPI to put in our attach message. 430 */ 431 static int 432 acpi_probe(device_t dev) 433 { 434 ACPI_TABLE_RSDP *rsdp; 435 ACPI_TABLE_HEADER *rsdt; 436 ACPI_PHYSICAL_ADDRESS paddr; 437 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 438 struct sbuf sb; 439 440 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 441 442 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 443 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 444 device_printf(dev, "probe failed, other PM system enabled.\n"); 445 return_VALUE (ENXIO); 446 } 447 448 if ((paddr = AcpiOsGetRootPointer()) == 0 || 449 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 450 return_VALUE (ENXIO); 451 if (acpi_ignore_xsdt == 0 && 452 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 453 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 454 else 455 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 456 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 457 458 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 459 return_VALUE (ENXIO); 460 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 461 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 462 sbuf_trim(&sb); 463 sbuf_putc(&sb, ' '); 464 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 465 sbuf_trim(&sb); 466 sbuf_finish(&sb); 467 device_set_desc_copy(dev, sbuf_data(&sb)); 468 sbuf_delete(&sb); 469 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 470 471 return_VALUE (0); 472 } 473 474 static int 475 acpi_attach(device_t dev) 476 { 477 struct acpi_softc *sc; 478 ACPI_STATUS status; 479 int error, state; 480 UINT32 flags; 481 UINT8 TypeA, TypeB; 482 char *env; 483 484 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 485 486 sc = device_get_softc(dev); 487 sc->acpi_dev = dev; 488 callout_init(&sc->susp_force_to); 489 490 if ((error = acpi_task_thread_init())) { 491 device_printf(dev, "Could not start task thread.\n"); 492 goto out2; 493 } 494 495 error = ENXIO; 496 497 /* Initialize resource manager. */ 498 acpi_rman_io.rm_type = RMAN_ARRAY; 499 acpi_rman_io.rm_start = 0; 500 acpi_rman_io.rm_end = 0xffff; 501 acpi_rman_io.rm_descr = "ACPI I/O ports"; 502 if (rman_init(&acpi_rman_io, -1) != 0) 503 panic("acpi rman_init IO ports failed"); 504 acpi_rman_mem.rm_type = RMAN_ARRAY; 505 acpi_rman_mem.rm_start = 0; 506 acpi_rman_mem.rm_end = ~0ul; 507 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 508 if (rman_init(&acpi_rman_mem, -1) != 0) 509 panic("acpi rman_init memory failed"); 510 511 /* Initialise the ACPI mutex */ 512 ACPI_LOCK_INIT(acpi, "acpi"); 513 ACPI_SERIAL_INIT(acpi); 514 515 ACPI_LOCK(acpi); 516 517 /* 518 * Set the globals from our tunables. This is needed because ACPICA 519 * uses UINT8 for some values and we have no tunable_byte. 520 */ 521 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 522 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE; 523 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 524 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 525 AcpiGbl_ExecuteTablesAsMethods = acpi_group_module_level_code ? 526 FALSE : TRUE; 527 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE; 528 AcpiGbl_Use32BitFacsAddresses = acpi_facs_addr32 ? TRUE : FALSE; 529 530 #ifndef ACPI_DEBUG 531 /* 532 * Disable Debug Object output. 533 */ 534 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 535 #endif 536 537 /* Override OS interfaces if the user requested. */ 538 acpi_reset_interfaces(dev); 539 540 /* Load ACPI name space. */ 541 status = AcpiLoadTables(); 542 if (ACPI_FAILURE(status)) { 543 device_printf(dev, "Could not load Namespace: %s\n", 544 AcpiFormatException(status)); 545 goto out; 546 } 547 548 /* Handle MCFG table if present. */ 549 acpi_enable_pcie(); 550 551 /* 552 * Note that some systems (specifically, those with namespace evaluation 553 * issues that require the avoidance of parts of the namespace) must 554 * avoid running _INI and _STA on everything, as well as dodging the final 555 * object init pass. 556 * 557 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 558 * 559 * XXX We should arrange for the object init pass after we have attached 560 * all our child devices, but on many systems it works here. 561 */ 562 flags = ACPI_FULL_INITIALIZATION; 563 if (ktestenv("debug.acpi.avoid")) 564 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 565 566 /* Bring the hardware and basic handlers online. */ 567 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 568 device_printf(dev, "Could not enable ACPI: %s\n", 569 AcpiFormatException(status)); 570 goto out; 571 } 572 573 /* 574 * Fix up the interrupt timer after enabling ACPI, so that the 575 * interrupt cputimer that choked by ACPI power management could 576 * be resurrected before probing various devices. 577 */ 578 DELAY(5000); 579 cputimer_intr_pmfixup(); 580 581 /* 582 * Call the ECDT probe function to provide EC functionality before 583 * the namespace has been evaluated. 584 * 585 * XXX This happens before the sysresource devices have been probed and 586 * attached so its resources come from nexus0. In practice, this isn't 587 * a problem but should be addressed eventually. 588 */ 589 acpi_ec_ecdt_probe(dev); 590 591 /* Bring device objects and regions online. */ 592 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 593 device_printf(dev, "Could not initialize ACPI objects: %s\n", 594 AcpiFormatException(status)); 595 goto out; 596 } 597 598 /* 599 * Setup our sysctl tree. 600 * 601 * XXX: This doesn't check to make sure that none of these fail. 602 */ 603 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 604 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 605 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 606 device_get_name(dev), CTLFLAG_RD, 0, ""); 607 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 608 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 609 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 610 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 611 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 612 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 613 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 614 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 615 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 616 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 617 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 618 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 619 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 620 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 621 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 622 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 623 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 624 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 625 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 626 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 627 "sleep delay"); 628 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 629 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 630 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 631 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 632 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 633 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 634 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 635 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 636 OID_AUTO, "handle_reboot", CTLFLAG_RW, 637 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 638 639 /* 640 * Default to 1 second before sleeping to give some machines time to 641 * stabilize. 642 */ 643 sc->acpi_sleep_delay = 1; 644 if (bootverbose) 645 sc->acpi_verbose = 1; 646 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 647 if (strcmp(env, "0") != 0) 648 sc->acpi_verbose = 1; 649 kfreeenv(env); 650 } 651 652 /* Only enable reboot by default if the FADT says it is available. */ 653 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 654 sc->acpi_handle_reboot = 1; 655 656 /* Only enable S4BIOS by default if the FACS says it is available. */ 657 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 658 sc->acpi_s4bios = 1; 659 660 /* 661 * Dispatch the default sleep state to devices. The lid switch is set 662 * to NONE by default to avoid surprising users. 663 */ 664 sc->acpi_power_button_sx = ACPI_STATE_S5; 665 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 666 sc->acpi_standby_sx = ACPI_STATE_S1; 667 sc->acpi_suspend_sx = ACPI_STATE_S3; 668 669 /* Pick the first valid sleep state for the sleep button default. */ 670 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 671 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 672 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 673 sc->acpi_sleep_button_sx = state; 674 break; 675 } 676 677 acpi_enable_fixed_events(sc); 678 679 /* 680 * Scan the namespace and attach/initialise children. 681 */ 682 683 /* Register our shutdown handler. */ 684 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 685 SHUTDOWN_PRI_LAST); 686 687 /* 688 * Register our acpi event handlers. 689 * XXX should be configurable eg. via userland policy manager. 690 */ 691 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 692 sc, ACPI_EVENT_PRI_LAST); 693 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 694 sc, ACPI_EVENT_PRI_LAST); 695 696 /* Flag our initial states. */ 697 sc->acpi_enabled = 1; 698 sc->acpi_sstate = ACPI_STATE_S0; 699 sc->acpi_sleep_disabled = 0; 700 /* Create the control device */ 701 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, "acpi"); 702 sc->acpi_dev_t->si_drv1 = sc; 703 704 if ((error = acpi_machdep_init(dev))) 705 goto out; 706 707 /* Register ACPI again to pass the correct argument of pm_func. */ 708 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 709 710 if (!acpi_disabled("bus")) 711 acpi_probe_children(dev); 712 713 /* Update all GPEs and enable runtime GPEs. */ 714 status = AcpiUpdateAllGpes(); 715 if (ACPI_FAILURE(status)) { 716 device_printf(dev, "Could not update all GPEs: %s\n", 717 AcpiFormatException(status)); 718 } 719 720 /* Allow sleep request after a while. */ 721 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 722 723 error = 0; 724 725 out: 726 ACPI_UNLOCK(acpi); 727 out2: 728 cputimer_intr_pmfixup(); 729 acpi_task_thread_schedule(); 730 731 return_VALUE (error); 732 } 733 734 static int 735 acpi_suspend(device_t dev) 736 { 737 device_t child, *devlist; 738 int error, i, numdevs, pstate; 739 740 /* First give child devices a chance to suspend. */ 741 error = bus_generic_suspend(dev); 742 if (error) 743 return (error); 744 745 /* 746 * Now, set them into the appropriate power state, usually D3. If the 747 * device has an _SxD method for the next sleep state, use that power 748 * state instead. 749 */ 750 device_get_children(dev, &devlist, &numdevs); 751 for (i = 0; i < numdevs; i++) { 752 /* If the device is not attached, we've powered it down elsewhere. */ 753 child = devlist[i]; 754 if (!device_is_attached(child)) 755 continue; 756 757 /* 758 * Default to D3 for all sleep states. The _SxD method is optional 759 * so set the powerstate even if it's absent. 760 */ 761 pstate = PCI_POWERSTATE_D3; 762 error = acpi_device_pwr_for_sleep(device_get_parent(child), 763 child, &pstate); 764 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 765 pci_set_powerstate(child, pstate); 766 } 767 kfree(devlist, M_TEMP); 768 error = 0; 769 770 return (error); 771 } 772 773 static int 774 acpi_resume(device_t dev) 775 { 776 ACPI_HANDLE handle; 777 int i, numdevs; 778 device_t child, *devlist; 779 780 /* 781 * Put all devices in D0 before resuming them. Call _S0D on each one 782 * since some systems expect this. 783 */ 784 device_get_children(dev, &devlist, &numdevs); 785 for (i = 0; i < numdevs; i++) { 786 child = devlist[i]; 787 handle = acpi_get_handle(child); 788 if (handle) 789 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 790 if (device_is_attached(child) && acpi_do_powerstate) 791 pci_set_powerstate(child, PCI_POWERSTATE_D0); 792 } 793 kfree(devlist, M_TEMP); 794 795 return (bus_generic_resume(dev)); 796 } 797 798 static int 799 acpi_shutdown(device_t dev) 800 { 801 /* Allow children to shutdown first. */ 802 bus_generic_shutdown(dev); 803 804 /* 805 * Enable any GPEs that are able to power-on the system (i.e., RTC). 806 * Also, disable any that are not valid for this state (most). 807 */ 808 acpi_wake_prep_walk(ACPI_STATE_S5); 809 810 return (0); 811 } 812 813 /* 814 * Handle a new device being added 815 */ 816 static device_t 817 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 818 { 819 struct acpi_device *ad; 820 device_t child; 821 822 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 823 return (NULL); 824 825 resource_list_init(&ad->ad_rl); 826 child = device_add_child_ordered(parent, order, name, unit); 827 if (child != NULL) 828 device_set_ivars(child, ad); 829 else 830 kfree(ad, M_ACPIDEV); 831 return (child); 832 } 833 834 static int 835 acpi_print_child(device_t bus, device_t child) 836 { 837 struct acpi_device *adev = device_get_ivars(child); 838 struct resource_list *rl = &adev->ad_rl; 839 int retval = 0; 840 841 retval += bus_print_child_header(bus, child); 842 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 843 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 844 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 845 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 846 if (device_get_flags(child)) 847 retval += kprintf(" flags %#x", device_get_flags(child)); 848 retval += bus_print_child_footer(bus, child); 849 850 return (retval); 851 } 852 853 /* 854 * If this device is an ACPI child but no one claimed it, attempt 855 * to power it off. We'll power it back up when a driver is added. 856 * 857 * XXX Disabled for now since many necessary devices (like fdc and 858 * ATA) don't claim the devices we created for them but still expect 859 * them to be powered up. 860 */ 861 static void 862 acpi_probe_nomatch(device_t bus, device_t child) 863 { 864 865 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 866 } 867 868 /* 869 * If a new driver has a chance to probe a child, first power it up. 870 * 871 * XXX Disabled for now (see acpi_probe_nomatch for details). 872 */ 873 static void 874 acpi_driver_added(device_t dev, driver_t *driver) 875 { 876 device_t child, *devlist; 877 int i, numdevs; 878 879 DEVICE_IDENTIFY(driver, dev); 880 device_get_children(dev, &devlist, &numdevs); 881 for (i = 0; i < numdevs; i++) { 882 child = devlist[i]; 883 if (device_get_state(child) == DS_NOTPRESENT) { 884 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 885 if (device_probe_and_attach(child) != 0) { 886 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 887 } 888 } 889 } 890 kfree(devlist, M_TEMP); 891 } 892 893 /* Location hint for devctl(8) */ 894 static int 895 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 896 size_t buflen) 897 { 898 struct acpi_device *dinfo = device_get_ivars(child); 899 900 if (dinfo->ad_handle) 901 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 902 else 903 ksnprintf(buf, buflen, "unknown"); 904 return (0); 905 } 906 907 /* PnP information for devctl(8) */ 908 static int 909 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 910 size_t buflen) 911 { 912 ACPI_DEVICE_INFO *adinfo; 913 struct acpi_device *dinfo = device_get_ivars(child); 914 915 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 916 ksnprintf(buf, buflen, "unknown"); 917 } else { 918 ksnprintf(buf, buflen, "_HID=%s _UID=%s", 919 (adinfo->Valid & ACPI_VALID_HID) ? 920 adinfo->HardwareId.String : "none", 921 (adinfo->Valid & ACPI_VALID_UID) ? 922 adinfo->UniqueId.String : "0"); 923 if (adinfo) 924 AcpiOsFree(adinfo); 925 } 926 return (0); 927 } 928 929 /* 930 * Handle per-device ivars 931 */ 932 static int 933 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 934 { 935 struct acpi_device *ad; 936 937 if ((ad = device_get_ivars(child)) == NULL) { 938 device_printf(child, "device has no ivars\n"); 939 return (ENOENT); 940 } 941 942 /* ACPI and ISA compatibility ivars */ 943 switch(index) { 944 case ACPI_IVAR_HANDLE: 945 *(ACPI_HANDLE *)result = ad->ad_handle; 946 break; 947 case ACPI_IVAR_MAGIC: 948 *result = ad->ad_magic; 949 break; 950 case ACPI_IVAR_PRIVATE: 951 *(void **)result = ad->ad_private; 952 break; 953 case ACPI_IVAR_FLAGS: 954 *(int *)result = ad->ad_flags; 955 break; 956 case ACPI_IVAR_RECHECK: 957 *(int *)result = ad->ad_recheck; 958 break; 959 case ISA_IVAR_VENDORID: 960 case ISA_IVAR_SERIAL: 961 case ISA_IVAR_COMPATID: 962 *(int *)result = -1; 963 break; 964 case ISA_IVAR_LOGICALID: 965 *(int *)result = acpi_isa_get_logicalid(child); 966 break; 967 default: 968 return (ENOENT); 969 } 970 971 return (0); 972 } 973 974 static int 975 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 976 { 977 struct acpi_device *ad; 978 979 if ((ad = device_get_ivars(child)) == NULL) { 980 device_printf(child, "device has no ivars\n"); 981 return (ENOENT); 982 } 983 984 switch(index) { 985 case ACPI_IVAR_HANDLE: 986 ad->ad_handle = (ACPI_HANDLE)value; 987 break; 988 case ACPI_IVAR_MAGIC: 989 ad->ad_magic = value; 990 break; 991 case ACPI_IVAR_PRIVATE: 992 ad->ad_private = (void *)value; 993 break; 994 case ACPI_IVAR_FLAGS: 995 ad->ad_flags = (int)value; 996 break; 997 case ACPI_IVAR_RECHECK: 998 ad->ad_recheck = (int)value; 999 break; 1000 default: 1001 panic("bad ivar write request (%d)", index); 1002 return (ENOENT); 1003 } 1004 1005 return (0); 1006 } 1007 1008 /* 1009 * Handle child resource allocation/removal 1010 */ 1011 static struct resource_list * 1012 acpi_get_rlist(device_t dev, device_t child) 1013 { 1014 struct acpi_device *ad; 1015 1016 ad = device_get_ivars(child); 1017 return (&ad->ad_rl); 1018 } 1019 1020 /* 1021 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1022 * duplicates, we merge any in the sysresource attach routine. 1023 */ 1024 static int 1025 acpi_sysres_alloc(device_t dev) 1026 { 1027 struct resource *res; 1028 struct resource_list *rl; 1029 struct resource_list_entry *rle; 1030 struct rman *rm; 1031 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1032 device_t *children; 1033 int child_count, i; 1034 /* 1035 * Probe/attach any sysresource devices. This would be unnecessary if we 1036 * had multi-pass probe/attach. 1037 */ 1038 if (device_get_children(dev, &children, &child_count) != 0) 1039 return (ENXIO); 1040 for (i = 0; i < child_count; i++) { 1041 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1042 device_probe_and_attach(children[i]); 1043 } 1044 kfree(children, M_TEMP); 1045 1046 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1047 if(!rl) 1048 return 0; 1049 SLIST_FOREACH(rle, rl, link) { 1050 if (rle->res != NULL) { 1051 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1052 continue; 1053 } 1054 1055 /* Only memory and IO resources are valid here. */ 1056 switch (rle->type) { 1057 case SYS_RES_IOPORT: 1058 rm = &acpi_rman_io; 1059 break; 1060 case SYS_RES_MEMORY: 1061 rm = &acpi_rman_mem; 1062 break; 1063 default: 1064 continue; 1065 } 1066 1067 /* Pre-allocate resource and add to our rman pool. */ 1068 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1069 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1070 0, -1); 1071 if (res != NULL) { 1072 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1073 rle->res = res; 1074 } else 1075 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1076 rle->start, rle->count, rle->type); 1077 } 1078 return (0); 1079 } 1080 1081 static struct resource * 1082 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1083 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1084 { 1085 ACPI_RESOURCE ares; 1086 struct acpi_device *ad = device_get_ivars(child); 1087 struct resource_list *rl = &ad->ad_rl; 1088 struct resource_list_entry *rle; 1089 struct resource *res; 1090 struct rman *rm; 1091 1092 res = NULL; 1093 1094 /* We only handle memory and IO resources through rman. */ 1095 switch (type) { 1096 case SYS_RES_IOPORT: 1097 rm = &acpi_rman_io; 1098 break; 1099 case SYS_RES_MEMORY: 1100 rm = &acpi_rman_mem; 1101 break; 1102 default: 1103 rm = NULL; 1104 } 1105 1106 ACPI_SERIAL_BEGIN(acpi); 1107 1108 /* 1109 * If this is an allocation of the "default" range for a given RID, and 1110 * we know what the resources for this device are (i.e., they're on the 1111 * child's resource list), use those start/end values. 1112 */ 1113 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1114 rle = resource_list_find(rl, type, *rid); 1115 if (rle == NULL) 1116 goto out; 1117 start = rle->start; 1118 end = rle->end; 1119 count = rle->count; 1120 cpuid = rle->cpuid; 1121 } 1122 1123 /* 1124 * If this is an allocation of a specific range, see if we can satisfy 1125 * the request from our system resource regions. If we can't, pass the 1126 * request up to the parent. 1127 */ 1128 if (start + count - 1 == end && rm != NULL) 1129 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1130 child); 1131 if (res == NULL) { 1132 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1133 start, end, count, flags, cpuid); 1134 } else { 1135 rman_set_rid(res, *rid); 1136 1137 /* If requested, activate the resource using the parent's method. */ 1138 if (flags & RF_ACTIVE) 1139 if (bus_activate_resource(child, type, *rid, res) != 0) { 1140 rman_release_resource(res); 1141 res = NULL; 1142 goto out; 1143 } 1144 } 1145 1146 if (res != NULL && device_get_parent(child) == bus) 1147 switch (type) { 1148 case SYS_RES_IRQ: 1149 /* 1150 * Since bus_config_intr() takes immediate effect, we cannot 1151 * configure the interrupt associated with a device when we 1152 * parse the resources but have to defer it until a driver 1153 * actually allocates the interrupt via bus_alloc_resource(). 1154 * 1155 * NB: Lookup failure is fine, since the device may add its 1156 * own interrupt resources, e.g. MSI or MSI-X. 1157 */ 1158 if (ACPI_SUCCESS( 1159 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1160 acpi_config_intr(child, &ares); 1161 } else { 1162 kprintf("irq resource not found\n"); 1163 } 1164 break; 1165 } 1166 1167 out: 1168 ACPI_SERIAL_END(acpi); 1169 return (res); 1170 } 1171 1172 static int 1173 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1174 struct resource *r) 1175 { 1176 struct rman *rm; 1177 int ret; 1178 1179 /* We only handle memory and IO resources through rman. */ 1180 switch (type) { 1181 case SYS_RES_IOPORT: 1182 rm = &acpi_rman_io; 1183 break; 1184 case SYS_RES_MEMORY: 1185 rm = &acpi_rman_mem; 1186 break; 1187 default: 1188 rm = NULL; 1189 } 1190 1191 ACPI_SERIAL_BEGIN(acpi); 1192 1193 /* 1194 * If this resource belongs to one of our internal managers, 1195 * deactivate it and release it to the local pool. If it doesn't, 1196 * pass this request up to the parent. 1197 */ 1198 if (rm != NULL && rman_is_region_manager(r, rm)) { 1199 if (rman_get_flags(r) & RF_ACTIVE) { 1200 ret = bus_deactivate_resource(child, type, rid, r); 1201 if (ret != 0) 1202 goto out; 1203 } 1204 ret = rman_release_resource(r); 1205 } else 1206 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1207 1208 out: 1209 ACPI_SERIAL_END(acpi); 1210 return (ret); 1211 } 1212 1213 static void 1214 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1215 { 1216 struct resource_list *rl; 1217 1218 rl = acpi_get_rlist(bus, child); 1219 resource_list_delete(rl, type, rid); 1220 } 1221 1222 /* Allocate an IO port or memory resource, given its GAS. */ 1223 int 1224 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1225 struct resource **res, u_int flags) 1226 { 1227 int error, res_type; 1228 1229 error = ENOMEM; 1230 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1231 return (EINVAL); 1232 1233 /* We only support memory and IO spaces. */ 1234 switch (gas->SpaceId) { 1235 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1236 res_type = SYS_RES_MEMORY; 1237 break; 1238 case ACPI_ADR_SPACE_SYSTEM_IO: 1239 res_type = SYS_RES_IOPORT; 1240 break; 1241 default: 1242 return (EOPNOTSUPP); 1243 } 1244 1245 /* 1246 * If the register width is less than 8, assume the BIOS author means 1247 * it is a bit field and just allocate a byte. 1248 */ 1249 if (gas->BitWidth && gas->BitWidth < 8) 1250 gas->BitWidth = 8; 1251 1252 /* Validate the address after we're sure we support the space. */ 1253 if (gas->Address == 0 || gas->BitWidth == 0) 1254 return (EINVAL); 1255 1256 bus_set_resource(dev, res_type, *rid, gas->Address, 1257 gas->BitWidth / 8, -1); 1258 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1259 if (*res != NULL) { 1260 *type = res_type; 1261 error = 0; 1262 } else 1263 bus_delete_resource(dev, res_type, *rid); 1264 1265 return (error); 1266 } 1267 1268 ACPI_STATUS 1269 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1270 int revision, uint32_t *buf, int count) 1271 { 1272 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1273 ACPI_OBJECT_LIST arglist; 1274 ACPI_OBJECT arg[4]; 1275 ACPI_OBJECT *retobj; 1276 ACPI_STATUS status; 1277 struct uuid uuid; 1278 uint32_t error; 1279 uint8_t oscuuid[ACPI_UUID_LENGTH]; 1280 int i; 1281 1282 if (parse_uuid(uuidstr, &uuid) != 0) 1283 return (AE_ERROR); 1284 le_uuid_enc(oscuuid, &uuid); 1285 1286 arglist.Pointer = arg; 1287 arglist.Count = 4; 1288 arg[0].Type = ACPI_TYPE_BUFFER; 1289 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 1290 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1291 arg[1].Type = ACPI_TYPE_INTEGER; 1292 arg[1].Integer.Value = revision; /* revision */ 1293 arg[2].Type = ACPI_TYPE_INTEGER; 1294 arg[2].Integer.Value = count; /* # of cap integers */ 1295 arg[3].Type = ACPI_TYPE_BUFFER; 1296 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1297 arg[3].Buffer.Pointer = (uint8_t *)buf; 1298 1299 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1300 if (ACPI_FAILURE(status)) 1301 goto done; 1302 retobj = retbuf.Pointer; 1303 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSC_ERRMASK; 1304 if (error == 0) 1305 goto done; 1306 status = AE_ERROR; 1307 if (error & ACPI_OSCERR_FAILURE) 1308 device_printf(dev, "_OSC unable to process request\n"); 1309 if (error & ACPI_OSCERR_BADUUID) 1310 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1311 if (error & ACPI_OSCERR_BADREV) 1312 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1313 if (error & ACPI_OSCERR_CAPSMASKED) { 1314 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1315 for (i = 1; i < count; i++) { 1316 device_printf(dev, 1317 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1318 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1319 } 1320 status = AE_SUPPORT; 1321 } else { 1322 status = AE_OK; 1323 } 1324 } 1325 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) { 1326 for (i = 0; i < count; i++) 1327 buf[i] = ((uint32_t *)retobj->Buffer.Pointer)[i]; 1328 } 1329 1330 done: 1331 if (retbuf.Pointer != NULL) 1332 AcpiOsFree(retbuf.Pointer); 1333 return (status); 1334 } 1335 1336 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1337 static uint32_t 1338 acpi_isa_get_logicalid(device_t dev) 1339 { 1340 ACPI_DEVICE_INFO *devinfo; 1341 ACPI_HANDLE h; 1342 uint32_t pnpid; 1343 1344 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1345 1346 devinfo = NULL; 1347 pnpid = 0; 1348 1349 /* Fetch and validate the HID. */ 1350 if ((h = acpi_get_handle(dev)) == NULL || 1351 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1352 goto out; 1353 1354 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1355 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1356 1357 out: 1358 if (devinfo) 1359 AcpiOsFree(devinfo); 1360 return_VALUE (pnpid); 1361 } 1362 1363 static int 1364 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1365 { 1366 ACPI_DEVICE_INFO *devinfo; 1367 ACPI_HANDLE h; 1368 uint32_t *pnpid; 1369 int valid, i; 1370 1371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1372 1373 devinfo = NULL; 1374 pnpid = cids; 1375 valid = 0; 1376 1377 /* Fetch and validate the CID */ 1378 if ((h = acpi_get_handle(dev)) == NULL || 1379 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1380 (devinfo->Valid & ACPI_VALID_CID) == 0) 1381 goto out; 1382 1383 if (devinfo->CompatibleIdList.Count < count) 1384 count = devinfo->CompatibleIdList.Count; 1385 for (i = 0; i < count; i++) { 1386 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1387 continue; 1388 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1389 valid++; 1390 } 1391 1392 out: 1393 if (devinfo) 1394 AcpiOsFree(devinfo); 1395 return_VALUE (valid); 1396 } 1397 1398 static char * 1399 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1400 { 1401 ACPI_HANDLE h; 1402 int i; 1403 1404 h = acpi_get_handle(dev); 1405 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1406 return (NULL); 1407 1408 /* Try to match one of the array of IDs with a HID or CID. */ 1409 for (i = 0; ids[i] != NULL; i++) { 1410 if (acpi_MatchHid(h, ids[i])) 1411 return (ids[i]); 1412 } 1413 return (NULL); 1414 } 1415 1416 static ACPI_STATUS 1417 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1418 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1419 { 1420 ACPI_HANDLE h; 1421 1422 if (dev == NULL) 1423 h = ACPI_ROOT_OBJECT; 1424 else if ((h = acpi_get_handle(dev)) == NULL) 1425 return (AE_BAD_PARAMETER); 1426 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1427 } 1428 1429 static int 1430 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1431 { 1432 struct acpi_softc *sc; 1433 ACPI_HANDLE handle; 1434 ACPI_STATUS status; 1435 char sxd[8]; 1436 int error; 1437 1438 sc = device_get_softc(bus); 1439 handle = acpi_get_handle(dev); 1440 1441 /* 1442 * XXX If we find these devices, don't try to power them down. 1443 * The serial and IRDA ports on my T23 hang the system when 1444 * set to D3 and it appears that such legacy devices may 1445 * need special handling in their drivers. 1446 */ 1447 if (handle == NULL || 1448 acpi_MatchHid(handle, "PNP0500") || 1449 acpi_MatchHid(handle, "PNP0501") || 1450 acpi_MatchHid(handle, "PNP0502") || 1451 acpi_MatchHid(handle, "PNP0510") || 1452 acpi_MatchHid(handle, "PNP0511")) 1453 return (ENXIO); 1454 1455 /* 1456 * Override next state with the value from _SxD, if present. If no 1457 * dstate argument was provided, don't fetch the return value. 1458 */ 1459 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1460 if (dstate) 1461 status = acpi_GetInteger(handle, sxd, dstate); 1462 else 1463 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1464 1465 switch (status) { 1466 case AE_OK: 1467 error = 0; 1468 break; 1469 case AE_NOT_FOUND: 1470 error = ESRCH; 1471 break; 1472 default: 1473 error = ENXIO; 1474 break; 1475 } 1476 1477 return (error); 1478 } 1479 1480 /* Callback arg for our implementation of walking the namespace. */ 1481 struct acpi_device_scan_ctx { 1482 acpi_scan_cb_t user_fn; 1483 void *arg; 1484 ACPI_HANDLE parent; 1485 }; 1486 1487 static ACPI_STATUS 1488 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1489 { 1490 struct acpi_device_scan_ctx *ctx; 1491 device_t dev, old_dev; 1492 ACPI_STATUS status; 1493 ACPI_OBJECT_TYPE type; 1494 1495 /* 1496 * Skip this device if we think we'll have trouble with it or it is 1497 * the parent where the scan began. 1498 */ 1499 ctx = (struct acpi_device_scan_ctx *)arg; 1500 if (acpi_avoid(h) || h == ctx->parent) 1501 return (AE_OK); 1502 1503 /* If this is not a valid device type (e.g., a method), skip it. */ 1504 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1505 return (AE_OK); 1506 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1507 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1508 return (AE_OK); 1509 1510 /* 1511 * Call the user function with the current device. If it is unchanged 1512 * afterwards, return. Otherwise, we update the handle to the new dev. 1513 */ 1514 old_dev = acpi_get_device(h); 1515 dev = old_dev; 1516 status = ctx->user_fn(h, &dev, level, ctx->arg); 1517 if (ACPI_FAILURE(status) || old_dev == dev) 1518 return (status); 1519 1520 /* Remove the old child and its connection to the handle. */ 1521 if (old_dev != NULL) { 1522 device_delete_child(device_get_parent(old_dev), old_dev); 1523 AcpiDetachData(h, acpi_fake_objhandler); 1524 } 1525 1526 /* Recreate the handle association if the user created a device. */ 1527 if (dev != NULL) 1528 AcpiAttachData(h, acpi_fake_objhandler, dev); 1529 1530 return (AE_OK); 1531 } 1532 1533 static ACPI_STATUS 1534 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1535 acpi_scan_cb_t user_fn, void *arg) 1536 { 1537 ACPI_HANDLE h; 1538 struct acpi_device_scan_ctx ctx; 1539 1540 if (acpi_disabled("children")) 1541 return (AE_OK); 1542 1543 if (dev == NULL) 1544 h = ACPI_ROOT_OBJECT; 1545 else if ((h = acpi_get_handle(dev)) == NULL) 1546 return (AE_BAD_PARAMETER); 1547 ctx.user_fn = user_fn; 1548 ctx.arg = arg; 1549 ctx.parent = h; 1550 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1551 acpi_device_scan_cb, NULL, &ctx, NULL)); 1552 } 1553 1554 /* 1555 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1556 * device power states since it's close enough to ACPI. 1557 */ 1558 static int 1559 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1560 { 1561 ACPI_HANDLE h; 1562 ACPI_STATUS status; 1563 int error; 1564 1565 error = 0; 1566 h = acpi_get_handle(child); 1567 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1568 return (EINVAL); 1569 if (h == NULL) 1570 return (0); 1571 1572 /* Ignore errors if the power methods aren't present. */ 1573 status = acpi_pwr_switch_consumer(h, state); 1574 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1575 && status != AE_BAD_PARAMETER) 1576 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1577 state, acpi_name(h), AcpiFormatException(status)); 1578 1579 return (error); 1580 } 1581 1582 static int 1583 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1584 { 1585 int result, cid_count, i; 1586 uint32_t lid, cids[8]; 1587 1588 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1589 1590 /* 1591 * ISA-style drivers attached to ACPI may persist and 1592 * probe manually if we return ENOENT. We never want 1593 * that to happen, so don't ever return it. 1594 */ 1595 result = ENXIO; 1596 1597 /* Scan the supplied IDs for a match */ 1598 lid = acpi_isa_get_logicalid(child); 1599 cid_count = acpi_isa_get_compatid(child, cids, 8); 1600 while (ids && ids->ip_id) { 1601 if (lid == ids->ip_id) { 1602 result = 0; 1603 goto out; 1604 } 1605 for (i = 0; i < cid_count; i++) { 1606 if (cids[i] == ids->ip_id) { 1607 result = 0; 1608 goto out; 1609 } 1610 } 1611 ids++; 1612 } 1613 1614 out: 1615 if (result == 0 && ids->ip_desc) 1616 device_set_desc(child, ids->ip_desc); 1617 1618 return_VALUE (result); 1619 } 1620 1621 /* 1622 * Look for a MCFG table. If it is present, use the settings for 1623 * domain (segment) 0 to setup PCI config space access via the memory 1624 * map. 1625 */ 1626 static void 1627 acpi_enable_pcie(void) 1628 { 1629 ACPI_TABLE_HEADER *hdr; 1630 ACPI_MCFG_ALLOCATION *alloc, *end; 1631 ACPI_STATUS status; 1632 1633 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1634 if (ACPI_FAILURE(status)) 1635 return; 1636 1637 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1638 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1639 while (alloc < end) { 1640 if (alloc->PciSegment == 0) { 1641 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1642 alloc->EndBusNumber); 1643 return; 1644 } 1645 alloc++; 1646 } 1647 } 1648 1649 /* 1650 * Scan all of the ACPI namespace and attach child devices. 1651 * 1652 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1653 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1654 * However, in violation of the spec, some systems place their PCI link 1655 * devices in \, so we have to walk the whole namespace. We check the 1656 * type of namespace nodes, so this should be ok. 1657 */ 1658 static void 1659 acpi_probe_children(device_t bus) 1660 { 1661 device_t *children; 1662 int cnt; 1663 1664 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1665 1666 /* 1667 * Scan the namespace and insert placeholders for all the devices that 1668 * we find. We also probe/attach any early devices. 1669 * 1670 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1671 * we want to create nodes for all devices, not just those that are 1672 * currently present. (This assumes that we don't want to create/remove 1673 * devices as they appear, which might be smarter.) 1674 */ 1675 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1676 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1677 acpi_probe_child, NULL, bus, NULL); 1678 /* This gets us all the children that we added from the ACPI namespace. */ 1679 device_get_children(bus, &children, &cnt); 1680 1681 /* Pre-allocate resources for our rman from any sysresource devices. */ 1682 acpi_sysres_alloc(bus); 1683 /* Create any static children by calling device identify methods. */ 1684 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1685 bus_generic_probe(bus); 1686 1687 /* Probe/attach all children, created staticly and from the namespace. */ 1688 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1689 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+2); 1690 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1691 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+1); 1692 /* Re-check device presence for previously disabled devices. */ 1693 acpi_reprobe_children(bus, children, cnt); 1694 kfree(children, M_TEMP); 1695 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "third bus_generic_attach\n")); 1696 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1697 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fourth bus_generic_attach\n")); 1698 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1699 1700 /* 1701 * Some of these children may have attached others as part of their attach 1702 * process (eg. the root PCI bus driver), so rescan. 1703 */ 1704 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fifth bus_generic_attach\n")); 1705 bus_generic_attach(bus); 1706 1707 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "sixth bus_generic_attach\n")); 1708 bus_generic_attach(bus); 1709 1710 /* Attach wake sysctls. */ 1711 acpi_wake_sysctl_walk(bus); 1712 1713 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1714 return_VOID; 1715 } 1716 1717 /* 1718 * Determine the probe order for a given device. 1719 */ 1720 static void 1721 acpi_probe_order(ACPI_HANDLE handle, int *order) 1722 { 1723 ACPI_OBJECT_TYPE type; 1724 1725 /* 1726 * 1. I/O port and memory system resource holders 1727 * 2. Embedded controllers (to handle early accesses) 1728 * 3. PCI Link Devices 1729 * 100000. CPUs 1730 */ 1731 AcpiGetType(handle, &type); 1732 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1733 *order = 1; 1734 else if (acpi_MatchHid(handle, "PNP0C09")) 1735 *order = 2; 1736 else if (acpi_MatchHid(handle, "PNP0C0F")) 1737 *order = 3; 1738 else if (type == ACPI_TYPE_PROCESSOR) 1739 *order = 100000; 1740 } 1741 1742 /* 1743 * Flag a device as disabled, because it isn't present according to the 1744 * _STA method. We set the recheck instance-variable, to make sure that we 1745 * recheck the device presence at a later point. 1746 */ 1747 static void 1748 acpi_disable_not_present(device_t child) 1749 { 1750 device_disable(child); 1751 acpi_set_recheck(child, 1); 1752 } 1753 1754 /* 1755 * This rechecks the device presence for all the devices which were disabled 1756 * using acpi_disable_not_present(). 1757 */ 1758 static void 1759 acpi_reprobe_children(device_t bus, device_t *children, int cnt) 1760 { 1761 int i; 1762 1763 for (i = 0; i < cnt; i++) { 1764 device_t dev = children[i]; 1765 1766 if (device_is_enabled(dev)) 1767 continue; 1768 1769 if (acpi_get_recheck(dev)) { 1770 if (acpi_DeviceIsPresent(dev)) { 1771 acpi_set_recheck(dev, 0); 1772 device_enable(dev); 1773 /* 1774 * Currently we parse the resources for every 1775 * device at the first time, when we see 1776 * that it is present. 1777 */ 1778 acpi_parse_resources(dev, acpi_get_handle(dev), 1779 &acpi_res_parse_set, NULL); 1780 } 1781 } 1782 } 1783 } 1784 1785 /* 1786 * Evaluate a child device and determine whether we might attach a device to 1787 * it. 1788 */ 1789 static ACPI_STATUS 1790 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1791 { 1792 struct acpi_prw_data prw; 1793 ACPI_OBJECT_TYPE type; 1794 ACPI_HANDLE h; 1795 device_t bus, child; 1796 int order; 1797 char *handle_str; 1798 1799 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1800 1801 if (acpi_disabled("children")) 1802 return_ACPI_STATUS (AE_OK); 1803 1804 /* Skip this device if we think we'll have trouble with it. */ 1805 if (acpi_avoid(handle)) 1806 return_ACPI_STATUS (AE_OK); 1807 1808 bus = (device_t)context; 1809 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1810 handle_str = acpi_name(handle); 1811 switch (type) { 1812 case ACPI_TYPE_DEVICE: 1813 /* 1814 * Since we scan from \, be sure to skip system scope objects. 1815 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1816 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1817 * during the intialization and \_TZ_ is to support Notify() on it. 1818 */ 1819 if (strcmp(handle_str, "\\_SB_") == 0 || 1820 strcmp(handle_str, "\\_TZ_") == 0) 1821 break; 1822 1823 if (acpi_parse_prw(handle, &prw) == 0) 1824 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1825 1826 /* FALLTHROUGH */ 1827 case ACPI_TYPE_PROCESSOR: 1828 case ACPI_TYPE_THERMAL: 1829 case ACPI_TYPE_POWER: 1830 /* 1831 * Create a placeholder device for this node. Sort the 1832 * placeholder so that the probe/attach passes will run 1833 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1834 * are reserved for special objects (i.e., system 1835 * resources). CPU devices have a very high order to 1836 * ensure they are probed after other devices. 1837 */ 1838 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1839 order = level * 10 + 100; 1840 acpi_probe_order(handle, &order); 1841 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1842 if (child == NULL) 1843 break; 1844 1845 /* Associate the handle with the device_t and vice versa. */ 1846 acpi_set_handle(child, handle); 1847 AcpiAttachData(handle, acpi_fake_objhandler, child); 1848 1849 /* 1850 * Check that the device is present. If it's not present, 1851 * leave it disabled (so that we have a device_t attached to 1852 * the handle, but we don't probe it). 1853 * 1854 * XXX PCI link devices sometimes report "present" but not 1855 * "functional" (i.e. if disabled). Go ahead and probe them 1856 * anyway since we may enable them later. 1857 */ 1858 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1859 /* Never disable PCI link devices. */ 1860 if (acpi_MatchHid(handle, "PNP0C0F")) 1861 break; 1862 /* 1863 * Docking stations should remain enabled since the system 1864 * may be undocked at boot. 1865 */ 1866 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1867 break; 1868 1869 acpi_disable_not_present(child); 1870 break; 1871 } 1872 1873 /* 1874 * Get the device's resource settings and attach them. 1875 * Note that if the device has _PRS but no _CRS, we need 1876 * to decide when it's appropriate to try to configure the 1877 * device. Ignore the return value here; it's OK for the 1878 * device not to have any resources. 1879 */ 1880 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1881 break; 1882 } 1883 } 1884 1885 return_ACPI_STATUS (AE_OK); 1886 } 1887 1888 /* 1889 * AcpiAttachData() requires an object handler but never uses it. This is a 1890 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1891 */ 1892 void 1893 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1894 { 1895 } 1896 1897 static void 1898 acpi_shutdown_final(void *arg, int howto) 1899 { 1900 struct acpi_softc *sc; 1901 ACPI_STATUS status; 1902 1903 /* 1904 * XXX Shutdown code should only run on the BSP (cpuid 0). 1905 * Some chipsets do not power off the system correctly if called from 1906 * an AP. 1907 */ 1908 sc = arg; 1909 if ((howto & RB_POWEROFF) != 0) { 1910 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1911 if (ACPI_FAILURE(status)) { 1912 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1913 AcpiFormatException(status)); 1914 return; 1915 } 1916 device_printf(sc->acpi_dev, "Powering system off\n"); 1917 ACPI_DISABLE_IRQS(); 1918 status = AcpiEnterSleepState(ACPI_STATE_S5); 1919 if (ACPI_FAILURE(status)) { 1920 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1921 AcpiFormatException(status)); 1922 } else { 1923 DELAY(1000000); 1924 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1925 } 1926 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1927 /* Reboot using the reset register. */ 1928 status = AcpiReset(); 1929 if (ACPI_FAILURE(status)) { 1930 if (status != AE_NOT_EXIST) 1931 device_printf(sc->acpi_dev, "reset failed - %s\n", 1932 AcpiFormatException(status)); 1933 } else { 1934 DELAY(1000000); 1935 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1936 } 1937 } else if (sc->acpi_do_disable && panicstr == NULL) { 1938 /* 1939 * Only disable ACPI if the user requested. On some systems, writing 1940 * the disable value to SMI_CMD hangs the system. 1941 */ 1942 device_printf(sc->acpi_dev, "Shutting down\n"); 1943 AcpiTerminate(); 1944 } 1945 } 1946 1947 static void 1948 acpi_enable_fixed_events(struct acpi_softc *sc) 1949 { 1950 static int first_time = 1; 1951 1952 /* Enable and clear fixed events and install handlers. */ 1953 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1954 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1955 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1956 acpi_event_power_button_sleep, sc); 1957 if (first_time) 1958 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1959 } 1960 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1961 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1962 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1963 acpi_event_sleep_button_sleep, sc); 1964 if (first_time) 1965 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1966 } 1967 1968 first_time = 0; 1969 } 1970 1971 /* 1972 * Returns true if the device is actually present and should 1973 * be attached to. This requires the present, enabled, UI-visible 1974 * and diagnostics-passed bits to be set. 1975 */ 1976 BOOLEAN 1977 acpi_DeviceIsPresent(device_t dev) 1978 { 1979 ACPI_HANDLE h; 1980 UINT32 s; 1981 ACPI_STATUS status; 1982 1983 h = acpi_get_handle(dev); 1984 if (h == NULL) 1985 return (FALSE); 1986 status = acpi_GetInteger(h, "_STA", &s); 1987 1988 /* If no _STA method, must be present */ 1989 if (ACPI_FAILURE(status)) 1990 return (status == AE_NOT_FOUND ? TRUE : FALSE); 1991 1992 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE); 1993 } 1994 1995 /* 1996 * Returns true if the battery is actually present and inserted. 1997 */ 1998 BOOLEAN 1999 acpi_BatteryIsPresent(device_t dev) 2000 { 2001 ACPI_HANDLE h; 2002 UINT32 s; 2003 ACPI_STATUS status; 2004 2005 h = acpi_get_handle(dev); 2006 if (h == NULL) 2007 return (FALSE); 2008 status = acpi_GetInteger(h, "_STA", &s); 2009 2010 /* If no _STA method, must be present */ 2011 if (ACPI_FAILURE(status)) 2012 return (status == AE_NOT_FOUND ? TRUE : FALSE); 2013 2014 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE); 2015 } 2016 2017 /* 2018 * Match a HID string against a handle 2019 */ 2020 BOOLEAN 2021 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2022 { 2023 ACPI_DEVICE_INFO *devinfo; 2024 int ret, i; 2025 2026 ret = FALSE; 2027 if (hid == NULL || h == NULL || 2028 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2029 return (ret); 2030 2031 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2032 strcmp(hid, devinfo->HardwareId.String) == 0) 2033 ret = TRUE; 2034 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 2035 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2036 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2037 ret = TRUE; 2038 break; 2039 } 2040 } 2041 } 2042 2043 AcpiOsFree(devinfo); 2044 return (ret); 2045 } 2046 2047 /* 2048 * Match a UID string against a handle 2049 */ 2050 BOOLEAN 2051 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 2052 { 2053 ACPI_DEVICE_INFO *devinfo; 2054 int ret; 2055 2056 ret = FALSE; 2057 if (uid == NULL || h == NULL || 2058 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2059 return (ret); 2060 2061 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 2062 strcmp(uid, devinfo->UniqueId.String) == 0) 2063 ret = TRUE; 2064 2065 AcpiOsFree(devinfo); 2066 return (ret); 2067 } 2068 2069 /* 2070 * Return the handle of a named object within our scope, ie. that of (parent) 2071 * or one if its parents. 2072 */ 2073 ACPI_STATUS 2074 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2075 { 2076 ACPI_HANDLE r; 2077 ACPI_STATUS status; 2078 2079 /* Walk back up the tree to the root */ 2080 for (;;) { 2081 status = AcpiGetHandle(parent, path, &r); 2082 if (ACPI_SUCCESS(status)) { 2083 *result = r; 2084 return (AE_OK); 2085 } 2086 /* XXX Return error here? */ 2087 if (status != AE_NOT_FOUND) 2088 return (AE_OK); 2089 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2090 return (AE_NOT_FOUND); 2091 parent = r; 2092 } 2093 } 2094 2095 /* 2096 * Allocate a buffer with a preset data size. 2097 */ 2098 ACPI_BUFFER * 2099 acpi_AllocBuffer(int size) 2100 { 2101 ACPI_BUFFER *buf; 2102 2103 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2104 return (NULL); 2105 buf->Length = size; 2106 buf->Pointer = (void *)(buf + 1); 2107 return (buf); 2108 } 2109 2110 ACPI_STATUS 2111 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2112 { 2113 ACPI_OBJECT arg1; 2114 ACPI_OBJECT_LIST args; 2115 2116 arg1.Type = ACPI_TYPE_INTEGER; 2117 arg1.Integer.Value = number; 2118 args.Count = 1; 2119 args.Pointer = &arg1; 2120 2121 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2122 } 2123 2124 /* 2125 * Evaluate a path that should return an integer. 2126 */ 2127 ACPI_STATUS 2128 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2129 { 2130 ACPI_STATUS status; 2131 ACPI_BUFFER buf; 2132 ACPI_OBJECT param; 2133 2134 if (handle == NULL) 2135 handle = ACPI_ROOT_OBJECT; 2136 2137 /* 2138 * Assume that what we've been pointed at is an Integer object, or 2139 * a method that will return an Integer. 2140 */ 2141 buf.Pointer = ¶m; 2142 buf.Length = sizeof(param); 2143 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2144 if (ACPI_SUCCESS(status)) { 2145 if (param.Type == ACPI_TYPE_INTEGER) 2146 *number = param.Integer.Value; 2147 else 2148 status = AE_TYPE; 2149 } 2150 2151 /* 2152 * In some applications, a method that's expected to return an Integer 2153 * may instead return a Buffer (probably to simplify some internal 2154 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2155 * convert it into an Integer as best we can. 2156 * 2157 * This is a hack. 2158 */ 2159 if (status == AE_BUFFER_OVERFLOW) { 2160 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2161 status = AE_NO_MEMORY; 2162 } else { 2163 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2164 if (ACPI_SUCCESS(status)) 2165 status = acpi_ConvertBufferToInteger(&buf, number); 2166 AcpiOsFree(buf.Pointer); 2167 } 2168 } 2169 return (status); 2170 } 2171 2172 ACPI_STATUS 2173 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2174 { 2175 ACPI_OBJECT *p; 2176 UINT8 *val; 2177 int i; 2178 2179 p = (ACPI_OBJECT *)bufp->Pointer; 2180 if (p->Type == ACPI_TYPE_INTEGER) { 2181 *number = p->Integer.Value; 2182 return (AE_OK); 2183 } 2184 if (p->Type != ACPI_TYPE_BUFFER) 2185 return (AE_TYPE); 2186 if (p->Buffer.Length > sizeof(int)) 2187 return (AE_BAD_DATA); 2188 2189 *number = 0; 2190 val = p->Buffer.Pointer; 2191 for (i = 0; i < p->Buffer.Length; i++) 2192 *number += val[i] << (i * 8); 2193 return (AE_OK); 2194 } 2195 2196 /* 2197 * Iterate over the elements of an a package object, calling the supplied 2198 * function for each element. 2199 * 2200 * XXX possible enhancement might be to abort traversal on error. 2201 */ 2202 ACPI_STATUS 2203 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2204 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2205 { 2206 ACPI_OBJECT *comp; 2207 int i; 2208 2209 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2210 return (AE_BAD_PARAMETER); 2211 2212 /* Iterate over components */ 2213 i = 0; 2214 comp = pkg->Package.Elements; 2215 for (; i < pkg->Package.Count; i++, comp++) 2216 func(comp, arg); 2217 2218 return (AE_OK); 2219 } 2220 2221 /* 2222 * Find the (index)th resource object in a set. 2223 */ 2224 ACPI_STATUS 2225 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2226 { 2227 ACPI_RESOURCE *rp; 2228 int i; 2229 2230 rp = (ACPI_RESOURCE *)buf->Pointer; 2231 i = index; 2232 while (i-- > 0) { 2233 /* Range check */ 2234 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2235 return (AE_BAD_PARAMETER); 2236 2237 /* Check for terminator */ 2238 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2239 return (AE_NOT_FOUND); 2240 rp = ACPI_NEXT_RESOURCE(rp); 2241 } 2242 if (resp != NULL) 2243 *resp = rp; 2244 2245 return (AE_OK); 2246 } 2247 2248 /* 2249 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2250 * 2251 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2252 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2253 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2254 * resources. 2255 */ 2256 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2257 2258 ACPI_STATUS 2259 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2260 { 2261 ACPI_RESOURCE *rp; 2262 void *newp; 2263 2264 /* Initialise the buffer if necessary. */ 2265 if (buf->Pointer == NULL) { 2266 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2267 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2268 return (AE_NO_MEMORY); 2269 rp = (ACPI_RESOURCE *)buf->Pointer; 2270 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2271 rp->Length = ACPI_RS_SIZE_MIN; 2272 } 2273 if (res == NULL) 2274 return (AE_OK); 2275 2276 /* 2277 * Scan the current buffer looking for the terminator. 2278 * This will either find the terminator or hit the end 2279 * of the buffer and return an error. 2280 */ 2281 rp = (ACPI_RESOURCE *)buf->Pointer; 2282 for (;;) { 2283 /* Range check, don't go outside the buffer */ 2284 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2285 return (AE_BAD_PARAMETER); 2286 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2287 break; 2288 rp = ACPI_NEXT_RESOURCE(rp); 2289 } 2290 2291 /* 2292 * Check the size of the buffer and expand if required. 2293 * 2294 * Required size is: 2295 * size of existing resources before terminator + 2296 * size of new resource and header + 2297 * size of terminator. 2298 * 2299 * Note that this loop should really only run once, unless 2300 * for some reason we are stuffing a *really* huge resource. 2301 */ 2302 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2303 res->Length + ACPI_RS_SIZE_NO_DATA + 2304 ACPI_RS_SIZE_MIN) >= buf->Length) { 2305 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2306 return (AE_NO_MEMORY); 2307 bcopy(buf->Pointer, newp, buf->Length); 2308 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2309 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2310 AcpiOsFree(buf->Pointer); 2311 buf->Pointer = newp; 2312 buf->Length += buf->Length; 2313 } 2314 2315 /* Insert the new resource. */ 2316 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2317 2318 /* And add the terminator. */ 2319 rp = ACPI_NEXT_RESOURCE(rp); 2320 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2321 rp->Length = ACPI_RS_SIZE_MIN; 2322 2323 return (AE_OK); 2324 } 2325 2326 /* 2327 * Set interrupt model. 2328 */ 2329 ACPI_STATUS 2330 acpi_SetIntrModel(int model) 2331 { 2332 2333 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2334 } 2335 2336 /* 2337 * DEPRECATED. This interface has serious deficiencies and will be 2338 * removed. 2339 * 2340 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2341 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2342 */ 2343 ACPI_STATUS 2344 acpi_SetSleepState(struct acpi_softc *sc, int state) 2345 { 2346 static int once; 2347 2348 if (!once) { 2349 device_printf(sc->acpi_dev, 2350 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2351 once = 1; 2352 } 2353 return (acpi_EnterSleepState(sc, state)); 2354 } 2355 2356 static void 2357 acpi_sleep_force(void *arg) 2358 { 2359 struct acpi_softc *sc; 2360 2361 sc = arg; 2362 device_printf(sc->acpi_dev, 2363 "suspend request timed out, forcing sleep now\n"); 2364 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2365 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2366 sc->acpi_next_sstate); 2367 } 2368 2369 /* 2370 * Request that the system enter the given suspend state. All /dev/apm 2371 * devices and devd(8) will be notified. Userland then has a chance to 2372 * save state and acknowledge the request. The system sleeps once all 2373 * acks are in. 2374 */ 2375 int 2376 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2377 { 2378 #ifdef notyet 2379 struct apm_clone_data *clone; 2380 #endif 2381 2382 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2383 return (EINVAL); 2384 2385 /* S5 (soft-off) should be entered directly with no waiting. */ 2386 if (state == ACPI_STATE_S5) { 2387 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2388 return (0); 2389 else 2390 return (ENXIO); 2391 } 2392 2393 /* This platform does not support acpi suspend/resume. */ 2394 return (EOPNOTSUPP); 2395 2396 /* If a suspend request is already in progress, just return. */ 2397 ACPI_LOCK(acpi); 2398 if (sc->acpi_next_sstate != 0) { 2399 ACPI_UNLOCK(acpi); 2400 return (0); 2401 } 2402 2403 /* Record the pending state and notify all apm devices. */ 2404 sc->acpi_next_sstate = state; 2405 #if 0 2406 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2407 clone->notify_status = APM_EV_NONE; 2408 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2409 KNOTE(&clone->sel_read.si_note, 0); 2410 } 2411 } 2412 #endif 2413 2414 /* If devd(8) is not running, immediately enter the sleep state. */ 2415 if (devctl_process_running() == FALSE) { 2416 ACPI_UNLOCK(acpi); 2417 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2418 return (0); 2419 } else { 2420 return (ENXIO); 2421 } 2422 } 2423 2424 /* Now notify devd(8) also. */ 2425 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2426 2427 /* 2428 * Set a timeout to fire if userland doesn't ack the suspend request 2429 * in time. This way we still eventually go to sleep if we were 2430 * overheating or running low on battery, even if userland is hung. 2431 * We cancel this timeout once all userland acks are in or the 2432 * suspend request is aborted. 2433 */ 2434 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2435 ACPI_UNLOCK(acpi); 2436 2437 return (0); 2438 } 2439 2440 /* 2441 * Acknowledge (or reject) a pending sleep state. The caller has 2442 * prepared for suspend and is now ready for it to proceed. If the 2443 * error argument is non-zero, it indicates suspend should be cancelled 2444 * and gives an errno value describing why. Once all votes are in, 2445 * we suspend the system. 2446 */ 2447 int 2448 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2449 { 2450 struct acpi_softc *sc; 2451 int ret, sleeping; 2452 2453 /* This platform does not support acpi suspend/resume. */ 2454 return (EOPNOTSUPP); 2455 2456 /* If no pending sleep state, return an error. */ 2457 ACPI_LOCK(acpi); 2458 sc = clone->acpi_sc; 2459 if (sc->acpi_next_sstate == 0) { 2460 ACPI_UNLOCK(acpi); 2461 return (ENXIO); 2462 } 2463 2464 /* Caller wants to abort suspend process. */ 2465 if (error) { 2466 sc->acpi_next_sstate = 0; 2467 callout_stop(&sc->susp_force_to); 2468 device_printf(sc->acpi_dev, 2469 "listener on %s cancelled the pending suspend\n", 2470 devtoname(clone->cdev)); 2471 ACPI_UNLOCK(acpi); 2472 return (0); 2473 } 2474 2475 /* 2476 * Mark this device as acking the suspend request. Then, walk through 2477 * all devices, seeing if they agree yet. We only count devices that 2478 * are writable since read-only devices couldn't ack the request. 2479 */ 2480 clone->notify_status = APM_EV_ACKED; 2481 sleeping = TRUE; 2482 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2483 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2484 clone->notify_status != APM_EV_ACKED) { 2485 sleeping = FALSE; 2486 break; 2487 } 2488 } 2489 2490 /* If all devices have voted "yes", we will suspend now. */ 2491 if (sleeping) 2492 callout_stop(&sc->susp_force_to); 2493 ACPI_UNLOCK(acpi); 2494 ret = 0; 2495 if (sleeping) { 2496 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2497 ret = ENODEV; 2498 } 2499 2500 return (ret); 2501 } 2502 2503 static void 2504 acpi_sleep_enable(void *arg) 2505 { 2506 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2507 } 2508 2509 enum acpi_sleep_state { 2510 ACPI_SS_NONE, 2511 ACPI_SS_GPE_SET, 2512 ACPI_SS_DEV_SUSPEND, 2513 ACPI_SS_SLP_PREP, 2514 ACPI_SS_SLEPT, 2515 }; 2516 2517 /* 2518 * Enter the desired system sleep state. 2519 * 2520 * Currently we support S1-S5 but S4 is only S4BIOS 2521 */ 2522 static ACPI_STATUS 2523 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2524 { 2525 ACPI_STATUS status; 2526 UINT8 TypeA; 2527 UINT8 TypeB; 2528 enum acpi_sleep_state slp_state; 2529 2530 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2531 2532 /* Re-entry once we're suspending is not allowed. */ 2533 status = AE_OK; 2534 ACPI_LOCK(acpi); 2535 if (sc->acpi_sleep_disabled) { 2536 ACPI_UNLOCK(acpi); 2537 device_printf(sc->acpi_dev, 2538 "suspend request ignored (not ready yet)\n"); 2539 return (AE_ERROR); 2540 } 2541 sc->acpi_sleep_disabled = 1; 2542 ACPI_UNLOCK(acpi); 2543 2544 /* 2545 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2546 * drivers need this. 2547 */ 2548 //get_mplock(); 2549 2550 slp_state = ACPI_SS_NONE; 2551 switch (state) { 2552 case ACPI_STATE_S1: 2553 case ACPI_STATE_S2: 2554 case ACPI_STATE_S3: 2555 case ACPI_STATE_S4: 2556 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2557 if (status == AE_NOT_FOUND) { 2558 device_printf(sc->acpi_dev, 2559 "Sleep state S%d not supported by BIOS\n", state); 2560 break; 2561 } else if (ACPI_FAILURE(status)) { 2562 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2563 AcpiFormatException(status)); 2564 break; 2565 } 2566 2567 sc->acpi_sstate = state; 2568 2569 /* Enable any GPEs as appropriate and requested by the user. */ 2570 acpi_wake_prep_walk(state); 2571 slp_state = ACPI_SS_GPE_SET; 2572 2573 /* 2574 * Inform all devices that we are going to sleep. If at least one 2575 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2576 * 2577 * XXX Note that a better two-pass approach with a 'veto' pass 2578 * followed by a "real thing" pass would be better, but the current 2579 * bus interface does not provide for this. 2580 */ 2581 if (DEVICE_SUSPEND(root_bus) != 0) { 2582 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2583 break; 2584 } 2585 slp_state = ACPI_SS_DEV_SUSPEND; 2586 2587 /* If testing device suspend only, back out of everything here. */ 2588 if (acpi_susp_bounce) 2589 break; 2590 2591 status = AcpiEnterSleepStatePrep(state); 2592 if (ACPI_FAILURE(status)) { 2593 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2594 AcpiFormatException(status)); 2595 break; 2596 } 2597 slp_state = ACPI_SS_SLP_PREP; 2598 2599 if (sc->acpi_sleep_delay > 0) 2600 DELAY(sc->acpi_sleep_delay * 1000000); 2601 2602 if (state != ACPI_STATE_S1) { 2603 acpi_sleep_machdep(sc, state); 2604 2605 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2606 if (state == ACPI_STATE_S4) 2607 AcpiEnable(); 2608 } else { 2609 ACPI_DISABLE_IRQS(); 2610 status = AcpiEnterSleepState(state); 2611 if (ACPI_FAILURE(status)) { 2612 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2613 AcpiFormatException(status)); 2614 break; 2615 } 2616 } 2617 slp_state = ACPI_SS_SLEPT; 2618 break; 2619 case ACPI_STATE_S5: 2620 /* 2621 * Shut down cleanly and power off. This will call us back through the 2622 * shutdown handlers. 2623 */ 2624 shutdown_nice(RB_POWEROFF); 2625 break; 2626 case ACPI_STATE_S0: 2627 default: 2628 status = AE_BAD_PARAMETER; 2629 break; 2630 } 2631 2632 /* 2633 * Back out state according to how far along we got in the suspend 2634 * process. This handles both the error and success cases. 2635 */ 2636 sc->acpi_next_sstate = 0; 2637 if (slp_state >= ACPI_SS_GPE_SET) { 2638 acpi_wake_prep_walk(state); 2639 sc->acpi_sstate = ACPI_STATE_S0; 2640 } 2641 if (slp_state >= ACPI_SS_SLP_PREP) 2642 AcpiLeaveSleepState(state); 2643 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2644 DEVICE_RESUME(root_bus); 2645 if (slp_state >= ACPI_SS_SLEPT) 2646 acpi_enable_fixed_events(sc); 2647 2648 /* Allow another sleep request after a while. */ 2649 /* XXX: needs timeout */ 2650 if (state != ACPI_STATE_S5) 2651 acpi_sleep_enable(sc); 2652 2653 /* Run /etc/rc.resume after we are back. */ 2654 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2655 2656 //rel_mplock(); 2657 2658 return_ACPI_STATUS (status); 2659 } 2660 2661 /* Enable or disable the device's GPE. */ 2662 int 2663 acpi_wake_set_enable(device_t dev, int enable) 2664 { 2665 struct acpi_prw_data prw; 2666 ACPI_STATUS status; 2667 int flags; 2668 2669 /* Make sure the device supports waking the system and get the GPE. */ 2670 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2671 return (ENXIO); 2672 2673 flags = acpi_get_flags(dev); 2674 if (enable) { 2675 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2676 ACPI_GPE_ENABLE); 2677 if (ACPI_FAILURE(status)) { 2678 device_printf(dev, "enable wake failed\n"); 2679 return (ENXIO); 2680 } 2681 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2682 } else { 2683 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2684 ACPI_GPE_DISABLE); 2685 if (ACPI_FAILURE(status)) { 2686 device_printf(dev, "disable wake failed\n"); 2687 return (ENXIO); 2688 } 2689 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2690 } 2691 2692 return (0); 2693 } 2694 2695 static int 2696 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2697 { 2698 struct acpi_prw_data prw; 2699 device_t dev; 2700 2701 /* Check that this is a wake-capable device and get its GPE. */ 2702 if (acpi_parse_prw(handle, &prw) != 0) 2703 return (ENXIO); 2704 dev = acpi_get_device(handle); 2705 2706 /* 2707 * The destination sleep state must be less than (i.e., higher power) 2708 * or equal to the value specified by _PRW. If this GPE cannot be 2709 * enabled for the next sleep state, then disable it. If it can and 2710 * the user requested it be enabled, turn on any required power resources 2711 * and set _PSW. 2712 */ 2713 if (sstate > prw.lowest_wake) { 2714 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2715 if (bootverbose) 2716 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2717 acpi_name(handle), sstate); 2718 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2719 acpi_pwr_wake_enable(handle, 1); 2720 acpi_SetInteger(handle, "_PSW", 1); 2721 if (bootverbose) 2722 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2723 acpi_name(handle), sstate); 2724 } 2725 2726 return (0); 2727 } 2728 2729 static int 2730 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2731 { 2732 struct acpi_prw_data prw; 2733 device_t dev; 2734 2735 /* 2736 * Check that this is a wake-capable device and get its GPE. Return 2737 * now if the user didn't enable this device for wake. 2738 */ 2739 if (acpi_parse_prw(handle, &prw) != 0) 2740 return (ENXIO); 2741 dev = acpi_get_device(handle); 2742 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2743 return (0); 2744 2745 /* 2746 * If this GPE couldn't be enabled for the previous sleep state, it was 2747 * disabled before going to sleep so re-enable it. If it was enabled, 2748 * clear _PSW and turn off any power resources it used. 2749 */ 2750 if (sstate > prw.lowest_wake) { 2751 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2752 if (bootverbose) 2753 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2754 } else { 2755 acpi_SetInteger(handle, "_PSW", 0); 2756 acpi_pwr_wake_enable(handle, 0); 2757 if (bootverbose) 2758 device_printf(dev, "run_prep cleaned up for %s\n", 2759 acpi_name(handle)); 2760 } 2761 2762 return (0); 2763 } 2764 2765 static ACPI_STATUS 2766 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2767 { 2768 int sstate; 2769 2770 /* If suspending, run the sleep prep function, otherwise wake. */ 2771 sstate = *(int *)context; 2772 if (AcpiGbl_SystemAwakeAndRunning) 2773 acpi_wake_sleep_prep(handle, sstate); 2774 else 2775 acpi_wake_run_prep(handle, sstate); 2776 return (AE_OK); 2777 } 2778 2779 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2780 static int 2781 acpi_wake_prep_walk(int sstate) 2782 { 2783 ACPI_HANDLE sb_handle; 2784 2785 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2786 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2787 acpi_wake_prep, NULL, &sstate, NULL); 2788 } 2789 return (0); 2790 } 2791 2792 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2793 static int 2794 acpi_wake_sysctl_walk(device_t dev) 2795 { 2796 #ifdef notyet 2797 int error, i, numdevs; 2798 device_t *devlist; 2799 device_t child; 2800 ACPI_STATUS status; 2801 2802 error = device_get_children(dev, &devlist, &numdevs); 2803 if (error != 0 || numdevs == 0) { 2804 if (numdevs == 0) 2805 kfree(devlist, M_TEMP); 2806 return (error); 2807 } 2808 for (i = 0; i < numdevs; i++) { 2809 child = devlist[i]; 2810 acpi_wake_sysctl_walk(child); 2811 if (!device_is_attached(child)) 2812 continue; 2813 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2814 if (ACPI_SUCCESS(status)) { 2815 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2816 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2817 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2818 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2819 } 2820 } 2821 kfree(devlist, M_TEMP); 2822 #endif 2823 2824 return (0); 2825 } 2826 2827 #ifdef notyet 2828 /* Enable or disable wake from userland. */ 2829 static int 2830 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2831 { 2832 int enable, error; 2833 device_t dev; 2834 2835 dev = (device_t)arg1; 2836 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2837 2838 error = sysctl_handle_int(oidp, &enable, 0, req); 2839 if (error != 0 || req->newptr == NULL) 2840 return (error); 2841 if (enable != 0 && enable != 1) 2842 return (EINVAL); 2843 2844 return (acpi_wake_set_enable(dev, enable)); 2845 } 2846 #endif 2847 2848 /* Parse a device's _PRW into a structure. */ 2849 int 2850 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2851 { 2852 ACPI_STATUS status; 2853 ACPI_BUFFER prw_buffer; 2854 ACPI_OBJECT *res, *res2; 2855 int error, i, power_count; 2856 2857 if (h == NULL || prw == NULL) 2858 return (EINVAL); 2859 2860 /* 2861 * The _PRW object (7.2.9) is only required for devices that have the 2862 * ability to wake the system from a sleeping state. 2863 */ 2864 error = EINVAL; 2865 prw_buffer.Pointer = NULL; 2866 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2867 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2868 if (ACPI_FAILURE(status)) 2869 return (ENOENT); 2870 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2871 if (res == NULL) 2872 return (ENOENT); 2873 if (!ACPI_PKG_VALID(res, 2)) 2874 goto out; 2875 2876 /* 2877 * Element 1 of the _PRW object: 2878 * The lowest power system sleeping state that can be entered while still 2879 * providing wake functionality. The sleeping state being entered must 2880 * be less than (i.e., higher power) or equal to this value. 2881 */ 2882 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2883 goto out; 2884 2885 /* 2886 * Element 0 of the _PRW object: 2887 */ 2888 switch (res->Package.Elements[0].Type) { 2889 case ACPI_TYPE_INTEGER: 2890 /* 2891 * If the data type of this package element is numeric, then this 2892 * _PRW package element is the bit index in the GPEx_EN, in the 2893 * GPE blocks described in the FADT, of the enable bit that is 2894 * enabled for the wake event. 2895 */ 2896 prw->gpe_handle = NULL; 2897 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2898 error = 0; 2899 break; 2900 case ACPI_TYPE_PACKAGE: 2901 /* 2902 * If the data type of this package element is a package, then this 2903 * _PRW package element is itself a package containing two 2904 * elements. The first is an object reference to the GPE Block 2905 * device that contains the GPE that will be triggered by the wake 2906 * event. The second element is numeric and it contains the bit 2907 * index in the GPEx_EN, in the GPE Block referenced by the 2908 * first element in the package, of the enable bit that is enabled for 2909 * the wake event. 2910 * 2911 * For example, if this field is a package then it is of the form: 2912 * Package() {\_SB.PCI0.ISA.GPE, 2} 2913 */ 2914 res2 = &res->Package.Elements[0]; 2915 if (!ACPI_PKG_VALID(res2, 2)) 2916 goto out; 2917 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2918 if (prw->gpe_handle == NULL) 2919 goto out; 2920 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2921 goto out; 2922 error = 0; 2923 break; 2924 default: 2925 goto out; 2926 } 2927 2928 /* Elements 2 to N of the _PRW object are power resources. */ 2929 power_count = res->Package.Count - 2; 2930 if (power_count > ACPI_PRW_MAX_POWERRES) { 2931 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2932 power_count = 0; 2933 } 2934 prw->power_res_count = power_count; 2935 for (i = 0; i < power_count; i++) 2936 prw->power_res[i] = res->Package.Elements[i]; 2937 2938 out: 2939 if (prw_buffer.Pointer != NULL) 2940 AcpiOsFree(prw_buffer.Pointer); 2941 return (error); 2942 } 2943 2944 /* 2945 * ACPI Event Handlers 2946 */ 2947 2948 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2949 2950 static void 2951 acpi_system_eventhandler_sleep(void *arg, int state) 2952 { 2953 struct acpi_softc *sc; 2954 int ret; 2955 2956 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2957 2958 sc = arg; 2959 2960 /* Check if button action is disabled. */ 2961 if (state == ACPI_S_STATES_MAX + 1) 2962 return; 2963 2964 /* Request that the system prepare to enter the given suspend state. */ 2965 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2966 if (ret != 0) 2967 device_printf(sc->acpi_dev, 2968 "request to enter state S%d failed (err %d)\n", state, ret); 2969 2970 return_VOID; 2971 } 2972 2973 static void 2974 acpi_system_eventhandler_wakeup(void *arg, int state) 2975 { 2976 2977 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2978 2979 /* Currently, nothing to do for wakeup. */ 2980 2981 return_VOID; 2982 } 2983 2984 /* 2985 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2986 */ 2987 UINT32 2988 acpi_event_power_button_sleep(void *context) 2989 { 2990 struct acpi_softc *sc = (struct acpi_softc *)context; 2991 2992 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2993 2994 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2995 2996 return_VALUE (ACPI_INTERRUPT_HANDLED); 2997 } 2998 2999 UINT32 3000 acpi_event_power_button_wake(void *context) 3001 { 3002 struct acpi_softc *sc = (struct acpi_softc *)context; 3003 3004 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3005 3006 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 3007 3008 return_VALUE (ACPI_INTERRUPT_HANDLED); 3009 } 3010 3011 UINT32 3012 acpi_event_sleep_button_sleep(void *context) 3013 { 3014 struct acpi_softc *sc = (struct acpi_softc *)context; 3015 3016 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3017 3018 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3019 3020 return_VALUE (ACPI_INTERRUPT_HANDLED); 3021 } 3022 3023 UINT32 3024 acpi_event_sleep_button_wake(void *context) 3025 { 3026 struct acpi_softc *sc = (struct acpi_softc *)context; 3027 3028 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3029 3030 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3031 3032 return_VALUE (ACPI_INTERRUPT_HANDLED); 3033 } 3034 3035 /* 3036 * XXX This static buffer is suboptimal. There is no locking so only 3037 * use this for single-threaded callers. 3038 */ 3039 char * 3040 acpi_name(ACPI_HANDLE handle) 3041 { 3042 ACPI_BUFFER buf; 3043 static char data[256]; 3044 3045 buf.Length = sizeof(data); 3046 buf.Pointer = data; 3047 3048 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3049 return (data); 3050 return ("(unknown)"); 3051 } 3052 3053 /* 3054 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3055 * parts of the namespace. 3056 */ 3057 int 3058 acpi_avoid(ACPI_HANDLE handle) 3059 { 3060 char *cp, *env, *np; 3061 int len; 3062 3063 np = acpi_name(handle); 3064 if (*np == '\\') 3065 np++; 3066 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 3067 return (0); 3068 3069 /* Scan the avoid list checking for a match */ 3070 cp = env; 3071 for (;;) { 3072 while (*cp != 0 && isspace(*cp)) 3073 cp++; 3074 if (*cp == 0) 3075 break; 3076 len = 0; 3077 while (cp[len] != 0 && !isspace(cp[len])) 3078 len++; 3079 if (!strncmp(cp, np, len)) { 3080 kfreeenv(env); 3081 return(1); 3082 } 3083 cp += len; 3084 } 3085 kfreeenv(env); 3086 3087 return (0); 3088 } 3089 3090 /* 3091 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3092 */ 3093 int 3094 acpi_disabled(char *subsys) 3095 { 3096 char *cp, *env; 3097 int len; 3098 3099 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3100 return (0); 3101 if (strcmp(env, "all") == 0) { 3102 kfreeenv(env); 3103 return (1); 3104 } 3105 3106 /* Scan the disable list, checking for a match. */ 3107 cp = env; 3108 for (;;) { 3109 while (*cp != '\0' && isspace(*cp)) 3110 cp++; 3111 if (*cp == '\0') 3112 break; 3113 len = 0; 3114 while (cp[len] != '\0' && !isspace(cp[len])) 3115 len++; 3116 if (strncmp(cp, subsys, len) == 0) { 3117 kfreeenv(env); 3118 return (1); 3119 } 3120 cp += len; 3121 } 3122 kfreeenv(env); 3123 3124 return (0); 3125 } 3126 3127 /* 3128 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3129 * components are enabled by default. The ones that are not have to be 3130 * enabled via debug.acpi.enabled. 3131 */ 3132 int 3133 acpi_enabled(char *subsys) 3134 { 3135 char *cp, *env; 3136 int len; 3137 3138 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3139 return (0); 3140 if (strcmp(env, "all") == 0) { 3141 kfreeenv(env); 3142 return (1); 3143 } 3144 3145 /* Scan the enable list, checking for a match. */ 3146 cp = env; 3147 for (;;) { 3148 while (*cp != '\0' && isspace(*cp)) 3149 cp++; 3150 if (*cp == '\0') 3151 break; 3152 len = 0; 3153 while (cp[len] != '\0' && !isspace(cp[len])) 3154 len++; 3155 if (strncmp(cp, subsys, len) == 0) { 3156 kfreeenv(env); 3157 return (1); 3158 } 3159 cp += len; 3160 } 3161 kfreeenv(env); 3162 3163 return (0); 3164 } 3165 3166 /* 3167 * Control interface. 3168 * 3169 * We multiplex ioctls for all participating ACPI devices here. Individual 3170 * drivers wanting to be accessible via /dev/acpi should use the 3171 * register/deregister interface to make their handlers visible. 3172 */ 3173 struct acpi_ioctl_hook 3174 { 3175 TAILQ_ENTRY(acpi_ioctl_hook) link; 3176 u_long cmd; 3177 acpi_ioctl_fn fn; 3178 void *arg; 3179 }; 3180 3181 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3182 static int acpi_ioctl_hooks_initted; 3183 3184 int 3185 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3186 { 3187 struct acpi_ioctl_hook *hp; 3188 3189 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3190 return (ENOMEM); 3191 hp->cmd = cmd; 3192 hp->fn = fn; 3193 hp->arg = arg; 3194 3195 ACPI_LOCK(acpi); 3196 if (acpi_ioctl_hooks_initted == 0) { 3197 TAILQ_INIT(&acpi_ioctl_hooks); 3198 acpi_ioctl_hooks_initted = 1; 3199 } 3200 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3201 ACPI_UNLOCK(acpi); 3202 3203 return (0); 3204 } 3205 3206 void 3207 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3208 { 3209 struct acpi_ioctl_hook *hp; 3210 3211 ACPI_LOCK(acpi); 3212 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3213 if (hp->cmd == cmd && hp->fn == fn) 3214 break; 3215 3216 if (hp != NULL) { 3217 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3218 kfree(hp, M_ACPIDEV); 3219 } 3220 ACPI_UNLOCK(acpi); 3221 } 3222 3223 static int 3224 acpiopen(struct dev_open_args *ap) 3225 { 3226 return (0); 3227 } 3228 3229 static int 3230 acpiclose(struct dev_close_args *ap) 3231 { 3232 return (0); 3233 } 3234 3235 static int 3236 acpiioctl(struct dev_ioctl_args *ap) 3237 { 3238 struct acpi_softc *sc; 3239 struct acpi_ioctl_hook *hp; 3240 int error, state; 3241 3242 error = 0; 3243 hp = NULL; 3244 sc = ap->a_head.a_dev->si_drv1; 3245 3246 /* 3247 * Scan the list of registered ioctls, looking for handlers. 3248 */ 3249 lwkt_gettoken(&acpi_token); 3250 ACPI_LOCK(acpi); 3251 if (acpi_ioctl_hooks_initted) { 3252 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3253 if (hp->cmd == ap->a_cmd) 3254 break; 3255 } 3256 } 3257 ACPI_UNLOCK(acpi); 3258 if (hp) { 3259 error = hp->fn(ap->a_cmd, ap->a_data, hp->arg); 3260 lwkt_reltoken(&acpi_token); 3261 return error; 3262 } 3263 3264 /* 3265 * Core ioctls are not permitted for non-writable user. 3266 * Currently, other ioctls just fetch information. 3267 * Not changing system behavior. 3268 */ 3269 if ((ap->a_fflag & FWRITE) == 0) { 3270 lwkt_reltoken(&acpi_token); 3271 return (EPERM); 3272 } 3273 3274 /* Core system ioctls. */ 3275 switch (ap->a_cmd) { 3276 case ACPIIO_REQSLPSTATE: 3277 state = *(int *)ap->a_data; 3278 if (state != ACPI_STATE_S5) 3279 error = acpi_ReqSleepState(sc, state); 3280 else { 3281 device_printf(sc->acpi_dev, 3282 "power off via acpi ioctl not supported\n"); 3283 error = ENXIO; 3284 } 3285 break; 3286 case ACPIIO_ACKSLPSTATE: 3287 error = EOPNOTSUPP; 3288 #if 0 /* notyet */ 3289 error = *(int *)ap->a_data; 3290 error = acpi_AckSleepState(sc->acpi_clone, error); 3291 #endif 3292 break; 3293 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3294 error = EINVAL; 3295 state = *(int *)ap->a_data; 3296 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3297 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3298 error = 0; 3299 break; 3300 case ACPIIO_DO_MCALL: 3301 if (acpi_allow_mcall == 1) { 3302 struct acpi_mcall_ioctl_arg *params; 3303 ACPI_BUFFER result = { ACPI_ALLOCATE_BUFFER, NULL }; 3304 ACPI_OBJECT *resobj; 3305 3306 error = EINVAL; 3307 params = (struct acpi_mcall_ioctl_arg *)ap->a_data; 3308 params->retval = AcpiEvaluateObject(NULL, params->path, 3309 ¶ms->args, &result); 3310 if (ACPI_SUCCESS(params->retval) && result.Pointer != NULL && 3311 params->result.Pointer != NULL) { 3312 params->result.Length = min(params->result.Length, 3313 result.Length); 3314 copyout(result.Pointer, params->result.Pointer, 3315 params->result.Length); 3316 params->reslen = result.Length; 3317 if (result.Length >= sizeof(ACPI_OBJECT)) { 3318 resobj = (ACPI_OBJECT *)params->result.Pointer; 3319 switch (resobj->Type) { 3320 case ACPI_TYPE_STRING: 3321 resobj->String.Pointer = (char *) 3322 ((UINT8 *)(resobj->String.Pointer) - 3323 (UINT8 *)result.Pointer + 3324 (UINT8 *)resobj); 3325 break; 3326 case ACPI_TYPE_BUFFER: 3327 resobj->Buffer.Pointer -= (UINT8 *)result.Pointer - 3328 (UINT8 *)resobj; 3329 break; 3330 } 3331 } 3332 error = 0; 3333 } 3334 if (result.Pointer != NULL) 3335 AcpiOsFree(result.Pointer); 3336 } else { 3337 device_printf(sc->acpi_dev, 3338 "debug.acpi.allow_method_calls must be set\n"); 3339 error = ENXIO; 3340 } 3341 break; 3342 default: 3343 error = ENXIO; 3344 break; 3345 } 3346 lwkt_reltoken(&acpi_token); 3347 3348 return (error); 3349 } 3350 3351 static int 3352 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3353 { 3354 int error; 3355 struct sbuf sb; 3356 UINT8 state, TypeA, TypeB; 3357 3358 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3359 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3360 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3361 sbuf_printf(&sb, "S%d ", state); 3362 sbuf_trim(&sb); 3363 sbuf_finish(&sb); 3364 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3365 sbuf_delete(&sb); 3366 return (error); 3367 } 3368 3369 static int 3370 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3371 { 3372 char sleep_state[10]; 3373 int error; 3374 u_int new_state, old_state; 3375 3376 old_state = *(u_int *)oidp->oid_arg1; 3377 if (old_state > ACPI_S_STATES_MAX + 1) 3378 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3379 else 3380 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3381 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3382 if (error == 0 && req->newptr != NULL) { 3383 new_state = ACPI_STATE_S0; 3384 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3385 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3386 break; 3387 if (new_state <= ACPI_S_STATES_MAX + 1) { 3388 if (new_state != old_state) 3389 *(u_int *)oidp->oid_arg1 = new_state; 3390 } else 3391 error = EINVAL; 3392 } 3393 3394 return (error); 3395 } 3396 3397 /* Inform devctl(4) when we receive a Notify. */ 3398 void 3399 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3400 { 3401 char notify_buf[16]; 3402 ACPI_BUFFER handle_buf; 3403 ACPI_STATUS status; 3404 3405 if (subsystem == NULL) 3406 return; 3407 3408 handle_buf.Pointer = NULL; 3409 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3410 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3411 if (ACPI_FAILURE(status)) 3412 return; 3413 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3414 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3415 AcpiOsFree(handle_buf.Pointer); 3416 } 3417 3418 #ifdef ACPI_DEBUG 3419 /* 3420 * Support for parsing debug options from the kernel environment. 3421 * 3422 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3423 * by specifying the names of the bits in the debug.acpi.layer and 3424 * debug.acpi.level environment variables. Bits may be unset by 3425 * prefixing the bit name with !. 3426 */ 3427 struct debugtag 3428 { 3429 char *name; 3430 UINT32 value; 3431 }; 3432 3433 static struct debugtag dbg_layer[] = { 3434 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3435 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3436 {"ACPI_EVENTS", ACPI_EVENTS}, 3437 {"ACPI_TABLES", ACPI_TABLES}, 3438 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3439 {"ACPI_PARSER", ACPI_PARSER}, 3440 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3441 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3442 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3443 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3444 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3445 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3446 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3447 3448 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3449 {"ACPI_BATTERY", ACPI_BATTERY}, 3450 {"ACPI_BUS", ACPI_BUS}, 3451 {"ACPI_BUTTON", ACPI_BUTTON}, 3452 {"ACPI_EC", ACPI_EC}, 3453 {"ACPI_FAN", ACPI_FAN}, 3454 {"ACPI_POWERRES", ACPI_POWERRES}, 3455 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3456 {"ACPI_THERMAL", ACPI_THERMAL}, 3457 {"ACPI_TIMER", ACPI_TIMER}, 3458 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3459 {NULL, 0} 3460 }; 3461 3462 static struct debugtag dbg_level[] = { 3463 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3464 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3465 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3466 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3467 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3468 3469 /* Trace verbosity level 1 [Standard Trace Level] */ 3470 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3471 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3472 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3473 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3474 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3475 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3476 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3477 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3478 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3479 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3480 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3481 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3482 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3483 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3484 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3485 3486 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3487 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3488 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3489 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3490 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3491 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3492 3493 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3494 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3495 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3496 {"ACPI_LV_IO", ACPI_LV_IO}, 3497 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3498 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3499 3500 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3501 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3502 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3503 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3504 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3505 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3506 {NULL, 0} 3507 }; 3508 3509 static void 3510 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3511 { 3512 char *ep; 3513 int i, l; 3514 int set; 3515 3516 while (*cp) { 3517 if (isspace(*cp)) { 3518 cp++; 3519 continue; 3520 } 3521 ep = cp; 3522 while (*ep && !isspace(*ep)) 3523 ep++; 3524 if (*cp == '!') { 3525 set = 0; 3526 cp++; 3527 if (cp == ep) 3528 continue; 3529 } else { 3530 set = 1; 3531 } 3532 l = ep - cp; 3533 for (i = 0; tag[i].name != NULL; i++) { 3534 if (!strncmp(cp, tag[i].name, l)) { 3535 if (set) 3536 *flag |= tag[i].value; 3537 else 3538 *flag &= ~tag[i].value; 3539 } 3540 } 3541 cp = ep; 3542 } 3543 } 3544 3545 static void 3546 acpi_set_debugging(void *junk) 3547 { 3548 char *layer, *level; 3549 3550 if (cold) { 3551 AcpiDbgLayer = 0; 3552 AcpiDbgLevel = 0; 3553 } 3554 3555 layer = kgetenv("debug.acpi.layer"); 3556 level = kgetenv("debug.acpi.level"); 3557 if (layer == NULL && level == NULL) 3558 return; 3559 3560 kprintf("ACPI set debug"); 3561 if (layer != NULL) { 3562 if (strcmp("NONE", layer) != 0) 3563 kprintf(" layer '%s'", layer); 3564 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3565 kfreeenv(layer); 3566 } 3567 if (level != NULL) { 3568 if (strcmp("NONE", level) != 0) 3569 kprintf(" level '%s'", level); 3570 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3571 kfreeenv(level); 3572 } 3573 kprintf("\n"); 3574 } 3575 3576 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3577 NULL); 3578 3579 static int 3580 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3581 { 3582 int error, *dbg; 3583 struct debugtag *tag; 3584 struct sbuf sb; 3585 3586 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3587 return (ENOMEM); 3588 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3589 tag = &dbg_layer[0]; 3590 dbg = &AcpiDbgLayer; 3591 } else { 3592 tag = &dbg_level[0]; 3593 dbg = &AcpiDbgLevel; 3594 } 3595 3596 /* Get old values if this is a get request. */ 3597 ACPI_SERIAL_BEGIN(acpi); 3598 if (*dbg == 0) { 3599 sbuf_cpy(&sb, "NONE"); 3600 } else if (req->newptr == NULL) { 3601 for (; tag->name != NULL; tag++) { 3602 if ((*dbg & tag->value) == tag->value) 3603 sbuf_printf(&sb, "%s ", tag->name); 3604 } 3605 } 3606 sbuf_trim(&sb); 3607 sbuf_finish(&sb); 3608 3609 /* Copy out the old values to the user. */ 3610 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3611 sbuf_delete(&sb); 3612 3613 /* If the user is setting a string, parse it. */ 3614 if (error == 0 && req->newptr != NULL) { 3615 *dbg = 0; 3616 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3617 acpi_set_debugging(NULL); 3618 } 3619 ACPI_SERIAL_END(acpi); 3620 3621 return (error); 3622 } 3623 3624 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3625 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3626 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3627 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3628 #endif /* ACPI_DEBUG */ 3629 3630 static int 3631 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3632 { 3633 int error; 3634 int old; 3635 3636 old = acpi_debug_objects; 3637 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3638 if (error != 0 || req->newptr == NULL) 3639 return (error); 3640 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3641 return (0); 3642 3643 ACPI_SERIAL_BEGIN(acpi); 3644 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3645 ACPI_SERIAL_END(acpi); 3646 3647 return (0); 3648 } 3649 3650 3651 static int 3652 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3653 { 3654 char *p; 3655 size_t len; 3656 int i, j; 3657 3658 p = str; 3659 while (isspace(*p) || *p == ',') 3660 p++; 3661 len = strlen(p); 3662 if (len == 0) 3663 return (0); 3664 p = kstrdup(p, M_TEMP); 3665 for (i = 0; i < len; i++) 3666 if (p[i] == ',') 3667 p[i] = '\0'; 3668 i = j = 0; 3669 while (i < len) 3670 if (isspace(p[i]) || p[i] == '\0') 3671 i++; 3672 else { 3673 i += strlen(p + i) + 1; 3674 j++; 3675 } 3676 if (j == 0) { 3677 kfree(p, M_TEMP); 3678 return (0); 3679 } 3680 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3681 iface->num = j; 3682 i = j = 0; 3683 while (i < len) 3684 if (isspace(p[i]) || p[i] == '\0') 3685 i++; 3686 else { 3687 iface->data[j] = p + i; 3688 i += strlen(p + i) + 1; 3689 j++; 3690 } 3691 3692 return (j); 3693 } 3694 3695 static void 3696 acpi_free_interfaces(struct acpi_interface *iface) 3697 { 3698 kfree(iface->data[0], M_TEMP); 3699 kfree(iface->data, M_TEMP); 3700 } 3701 3702 static void 3703 acpi_reset_interfaces(device_t dev) 3704 { 3705 struct acpi_interface list; 3706 ACPI_STATUS status; 3707 int i; 3708 3709 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3710 for (i = 0; i < list.num; i++) { 3711 status = AcpiInstallInterface(list.data[i]); 3712 if (ACPI_FAILURE(status)) 3713 device_printf(dev, 3714 "failed to install _OSI(\"%s\"): %s\n", 3715 list.data[i], AcpiFormatException(status)); 3716 else if (bootverbose) 3717 device_printf(dev, "installed _OSI(\"%s\")\n", 3718 list.data[i]); 3719 } 3720 acpi_free_interfaces(&list); 3721 } 3722 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3723 for (i = 0; i < list.num; i++) { 3724 status = AcpiRemoveInterface(list.data[i]); 3725 if (ACPI_FAILURE(status)) 3726 device_printf(dev, 3727 "failed to remove _OSI(\"%s\"): %s\n", 3728 list.data[i], AcpiFormatException(status)); 3729 else if (bootverbose) 3730 device_printf(dev, "removed _OSI(\"%s\")\n", 3731 list.data[i]); 3732 } 3733 acpi_free_interfaces(&list); 3734 } 3735 } 3736 3737 static int 3738 acpi_pm_func(u_long cmd, void *arg, ...) 3739 { 3740 int state, acpi_state; 3741 int error; 3742 struct acpi_softc *sc; 3743 __va_list ap; 3744 3745 error = 0; 3746 switch (cmd) { 3747 case POWER_CMD_SUSPEND: 3748 sc = (struct acpi_softc *)arg; 3749 if (sc == NULL) { 3750 error = EINVAL; 3751 goto out; 3752 } 3753 3754 __va_start(ap, arg); 3755 state = __va_arg(ap, int); 3756 __va_end(ap); 3757 3758 switch (state) { 3759 case POWER_SLEEP_STATE_STANDBY: 3760 acpi_state = sc->acpi_standby_sx; 3761 break; 3762 case POWER_SLEEP_STATE_SUSPEND: 3763 acpi_state = sc->acpi_suspend_sx; 3764 break; 3765 case POWER_SLEEP_STATE_HIBERNATE: 3766 acpi_state = ACPI_STATE_S4; 3767 break; 3768 default: 3769 error = EINVAL; 3770 goto out; 3771 } 3772 3773 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3774 error = ENXIO; 3775 break; 3776 default: 3777 error = EINVAL; 3778 goto out; 3779 } 3780 3781 out: 3782 return (error); 3783 } 3784 3785 static void 3786 acpi_pm_register(void *arg) 3787 { 3788 if (!cold || resource_disabled("acpi", 0)) 3789 return; 3790 3791 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3792 } 3793 3794 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3795