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