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