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 return (status); 1276 } else { 1277 retobj = retbuf.Pointer; 1278 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & 1279 ~ACPI_OSC_QUERY_SUPPORT; 1280 if (error & ACPI_OSCERR_OSCFAIL) { 1281 device_printf(dev, "_OSC unable to process request\n"); 1282 status = AE_ERROR; 1283 } 1284 if (error & ACPI_OSCERR_UUID) { 1285 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1286 status = AE_ERROR; 1287 } 1288 if (error & ACPI_OSCERR_REVISION) { 1289 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", 1290 revision); 1291 status = AE_ERROR; 1292 } 1293 if (error & ACPI_OSCERR_CAPSMASKED) { 1294 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) 1295 goto done; 1296 for (i = 1; i < count; i++) { 1297 device_printf(dev, 1298 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1299 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1300 } 1301 status = AE_SUPPORT; 1302 } 1303 } 1304 1305 done: 1306 AcpiOsFree(retbuf.Pointer); 1307 return (status); 1308 } 1309 1310 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1311 static uint32_t 1312 acpi_isa_get_logicalid(device_t dev) 1313 { 1314 ACPI_DEVICE_INFO *devinfo; 1315 ACPI_HANDLE h; 1316 uint32_t pnpid; 1317 1318 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1319 1320 devinfo = NULL; 1321 pnpid = 0; 1322 1323 /* Fetch and validate the HID. */ 1324 if ((h = acpi_get_handle(dev)) == NULL || 1325 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1326 goto out; 1327 1328 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1329 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1330 1331 out: 1332 if (devinfo) 1333 AcpiOsFree(devinfo); 1334 return_VALUE (pnpid); 1335 } 1336 1337 static int 1338 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1339 { 1340 ACPI_DEVICE_INFO *devinfo; 1341 ACPI_HANDLE h; 1342 uint32_t *pnpid; 1343 int valid, i; 1344 1345 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1346 1347 devinfo = NULL; 1348 pnpid = cids; 1349 valid = 0; 1350 1351 /* Fetch and validate the CID */ 1352 if ((h = acpi_get_handle(dev)) == NULL || 1353 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1354 (devinfo->Valid & ACPI_VALID_CID) == 0) 1355 goto out; 1356 1357 if (devinfo->CompatibleIdList.Count < count) 1358 count = devinfo->CompatibleIdList.Count; 1359 for (i = 0; i < count; i++) { 1360 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1361 continue; 1362 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1363 valid++; 1364 } 1365 1366 out: 1367 if (devinfo) 1368 AcpiOsFree(devinfo); 1369 return_VALUE (valid); 1370 } 1371 1372 static char * 1373 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1374 { 1375 ACPI_HANDLE h; 1376 int i; 1377 1378 h = acpi_get_handle(dev); 1379 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1380 return (NULL); 1381 1382 /* Try to match one of the array of IDs with a HID or CID. */ 1383 for (i = 0; ids[i] != NULL; i++) { 1384 if (acpi_MatchHid(h, ids[i])) 1385 return (ids[i]); 1386 } 1387 return (NULL); 1388 } 1389 1390 static ACPI_STATUS 1391 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1392 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1393 { 1394 ACPI_HANDLE h; 1395 1396 if (dev == NULL) 1397 h = ACPI_ROOT_OBJECT; 1398 else if ((h = acpi_get_handle(dev)) == NULL) 1399 return (AE_BAD_PARAMETER); 1400 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1401 } 1402 1403 static int 1404 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1405 { 1406 struct acpi_softc *sc; 1407 ACPI_HANDLE handle; 1408 ACPI_STATUS status; 1409 char sxd[8]; 1410 int error; 1411 1412 sc = device_get_softc(bus); 1413 handle = acpi_get_handle(dev); 1414 1415 /* 1416 * XXX If we find these devices, don't try to power them down. 1417 * The serial and IRDA ports on my T23 hang the system when 1418 * set to D3 and it appears that such legacy devices may 1419 * need special handling in their drivers. 1420 */ 1421 if (handle == NULL || 1422 acpi_MatchHid(handle, "PNP0500") || 1423 acpi_MatchHid(handle, "PNP0501") || 1424 acpi_MatchHid(handle, "PNP0502") || 1425 acpi_MatchHid(handle, "PNP0510") || 1426 acpi_MatchHid(handle, "PNP0511")) 1427 return (ENXIO); 1428 1429 /* 1430 * Override next state with the value from _SxD, if present. If no 1431 * dstate argument was provided, don't fetch the return value. 1432 */ 1433 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1434 if (dstate) 1435 status = acpi_GetInteger(handle, sxd, dstate); 1436 else 1437 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1438 1439 switch (status) { 1440 case AE_OK: 1441 error = 0; 1442 break; 1443 case AE_NOT_FOUND: 1444 error = ESRCH; 1445 break; 1446 default: 1447 error = ENXIO; 1448 break; 1449 } 1450 1451 return (error); 1452 } 1453 1454 /* Callback arg for our implementation of walking the namespace. */ 1455 struct acpi_device_scan_ctx { 1456 acpi_scan_cb_t user_fn; 1457 void *arg; 1458 ACPI_HANDLE parent; 1459 }; 1460 1461 static ACPI_STATUS 1462 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1463 { 1464 struct acpi_device_scan_ctx *ctx; 1465 device_t dev, old_dev; 1466 ACPI_STATUS status; 1467 ACPI_OBJECT_TYPE type; 1468 1469 /* 1470 * Skip this device if we think we'll have trouble with it or it is 1471 * the parent where the scan began. 1472 */ 1473 ctx = (struct acpi_device_scan_ctx *)arg; 1474 if (acpi_avoid(h) || h == ctx->parent) 1475 return (AE_OK); 1476 1477 /* If this is not a valid device type (e.g., a method), skip it. */ 1478 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1479 return (AE_OK); 1480 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1481 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1482 return (AE_OK); 1483 1484 /* 1485 * Call the user function with the current device. If it is unchanged 1486 * afterwards, return. Otherwise, we update the handle to the new dev. 1487 */ 1488 old_dev = acpi_get_device(h); 1489 dev = old_dev; 1490 status = ctx->user_fn(h, &dev, level, ctx->arg); 1491 if (ACPI_FAILURE(status) || old_dev == dev) 1492 return (status); 1493 1494 /* Remove the old child and its connection to the handle. */ 1495 if (old_dev != NULL) { 1496 device_delete_child(device_get_parent(old_dev), old_dev); 1497 AcpiDetachData(h, acpi_fake_objhandler); 1498 } 1499 1500 /* Recreate the handle association if the user created a device. */ 1501 if (dev != NULL) 1502 AcpiAttachData(h, acpi_fake_objhandler, dev); 1503 1504 return (AE_OK); 1505 } 1506 1507 static ACPI_STATUS 1508 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1509 acpi_scan_cb_t user_fn, void *arg) 1510 { 1511 ACPI_HANDLE h; 1512 struct acpi_device_scan_ctx ctx; 1513 1514 if (acpi_disabled("children")) 1515 return (AE_OK); 1516 1517 if (dev == NULL) 1518 h = ACPI_ROOT_OBJECT; 1519 else if ((h = acpi_get_handle(dev)) == NULL) 1520 return (AE_BAD_PARAMETER); 1521 ctx.user_fn = user_fn; 1522 ctx.arg = arg; 1523 ctx.parent = h; 1524 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1525 acpi_device_scan_cb, NULL, &ctx, NULL)); 1526 } 1527 1528 /* 1529 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1530 * device power states since it's close enough to ACPI. 1531 */ 1532 static int 1533 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1534 { 1535 ACPI_HANDLE h; 1536 ACPI_STATUS status; 1537 int error; 1538 1539 error = 0; 1540 h = acpi_get_handle(child); 1541 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1542 return (EINVAL); 1543 if (h == NULL) 1544 return (0); 1545 1546 /* Ignore errors if the power methods aren't present. */ 1547 status = acpi_pwr_switch_consumer(h, state); 1548 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1549 && status != AE_BAD_PARAMETER) 1550 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1551 state, acpi_name(h), AcpiFormatException(status)); 1552 1553 return (error); 1554 } 1555 1556 static int 1557 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1558 { 1559 int result, cid_count, i; 1560 uint32_t lid, cids[8]; 1561 1562 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1563 1564 /* 1565 * ISA-style drivers attached to ACPI may persist and 1566 * probe manually if we return ENOENT. We never want 1567 * that to happen, so don't ever return it. 1568 */ 1569 result = ENXIO; 1570 1571 /* Scan the supplied IDs for a match */ 1572 lid = acpi_isa_get_logicalid(child); 1573 cid_count = acpi_isa_get_compatid(child, cids, 8); 1574 while (ids && ids->ip_id) { 1575 if (lid == ids->ip_id) { 1576 result = 0; 1577 goto out; 1578 } 1579 for (i = 0; i < cid_count; i++) { 1580 if (cids[i] == ids->ip_id) { 1581 result = 0; 1582 goto out; 1583 } 1584 } 1585 ids++; 1586 } 1587 1588 out: 1589 if (result == 0 && ids->ip_desc) 1590 device_set_desc(child, ids->ip_desc); 1591 1592 return_VALUE (result); 1593 } 1594 1595 /* 1596 * Look for a MCFG table. If it is present, use the settings for 1597 * domain (segment) 0 to setup PCI config space access via the memory 1598 * map. 1599 */ 1600 static void 1601 acpi_enable_pcie(void) 1602 { 1603 ACPI_TABLE_HEADER *hdr; 1604 ACPI_MCFG_ALLOCATION *alloc, *end; 1605 ACPI_STATUS status; 1606 1607 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1608 if (ACPI_FAILURE(status)) 1609 return; 1610 1611 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1612 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1613 while (alloc < end) { 1614 if (alloc->PciSegment == 0) { 1615 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1616 alloc->EndBusNumber); 1617 return; 1618 } 1619 alloc++; 1620 } 1621 } 1622 1623 /* 1624 * Scan all of the ACPI namespace and attach child devices. 1625 * 1626 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1627 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1628 * However, in violation of the spec, some systems place their PCI link 1629 * devices in \, so we have to walk the whole namespace. We check the 1630 * type of namespace nodes, so this should be ok. 1631 */ 1632 static void 1633 acpi_probe_children(device_t bus) 1634 { 1635 1636 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1637 1638 /* 1639 * Scan the namespace and insert placeholders for all the devices that 1640 * we find. We also probe/attach any early devices. 1641 * 1642 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1643 * we want to create nodes for all devices, not just those that are 1644 * currently present. (This assumes that we don't want to create/remove 1645 * devices as they appear, which might be smarter.) 1646 */ 1647 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1648 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1649 acpi_probe_child, NULL, bus, NULL); 1650 1651 /* Pre-allocate resources for our rman from any sysresource devices. */ 1652 acpi_sysres_alloc(bus); 1653 /* Create any static children by calling device identify methods. */ 1654 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1655 bus_generic_probe(bus); 1656 1657 /* Probe/attach all children, created staticly and from the namespace. */ 1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1659 bus_generic_attach(bus); 1660 1661 /* 1662 * Some of these children may have attached others as part of their attach 1663 * process (eg. the root PCI bus driver), so rescan. 1664 */ 1665 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1666 bus_generic_attach(bus); 1667 1668 /* Attach wake sysctls. */ 1669 acpi_wake_sysctl_walk(bus); 1670 1671 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1672 return_VOID; 1673 } 1674 1675 /* 1676 * Determine the probe order for a given device. 1677 */ 1678 static void 1679 acpi_probe_order(ACPI_HANDLE handle, int *order) 1680 { 1681 ACPI_OBJECT_TYPE type; 1682 1683 /* 1684 * 1. I/O port and memory system resource holders 1685 * 2. Embedded controllers (to handle early accesses) 1686 * 3. PCI Link Devices 1687 * 100000. CPUs 1688 */ 1689 AcpiGetType(handle, &type); 1690 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1691 *order = 1; 1692 else if (acpi_MatchHid(handle, "PNP0C09")) 1693 *order = 2; 1694 else if (acpi_MatchHid(handle, "PNP0C0F")) 1695 *order = 3; 1696 else if (type == ACPI_TYPE_PROCESSOR) 1697 *order = 100000; 1698 } 1699 1700 /* 1701 * Evaluate a child device and determine whether we might attach a device to 1702 * it. 1703 */ 1704 static ACPI_STATUS 1705 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1706 { 1707 struct acpi_prw_data prw; 1708 ACPI_OBJECT_TYPE type; 1709 ACPI_HANDLE h; 1710 device_t bus, child; 1711 int order; 1712 char *handle_str; 1713 1714 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1715 1716 if (acpi_disabled("children")) 1717 return_ACPI_STATUS (AE_OK); 1718 1719 /* Skip this device if we think we'll have trouble with it. */ 1720 if (acpi_avoid(handle)) 1721 return_ACPI_STATUS (AE_OK); 1722 1723 bus = (device_t)context; 1724 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1725 handle_str = acpi_name(handle); 1726 switch (type) { 1727 case ACPI_TYPE_DEVICE: 1728 /* 1729 * Since we scan from \, be sure to skip system scope objects. 1730 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1731 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1732 * during the intialization and \_TZ_ is to support Notify() on it. 1733 */ 1734 if (strcmp(handle_str, "\\_SB_") == 0 || 1735 strcmp(handle_str, "\\_TZ_") == 0) 1736 break; 1737 1738 if (acpi_parse_prw(handle, &prw) == 0) 1739 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1740 1741 /* FALLTHROUGH */ 1742 case ACPI_TYPE_PROCESSOR: 1743 case ACPI_TYPE_THERMAL: 1744 case ACPI_TYPE_POWER: 1745 /* 1746 * Create a placeholder device for this node. Sort the 1747 * placeholder so that the probe/attach passes will run 1748 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1749 * are reserved for special objects (i.e., system 1750 * resources). CPU devices have a very high order to 1751 * ensure they are probed after other devices. 1752 */ 1753 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1754 order = level * 10 + 100; 1755 acpi_probe_order(handle, &order); 1756 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1757 if (child == NULL) 1758 break; 1759 1760 /* Associate the handle with the device_t and vice versa. */ 1761 acpi_set_handle(child, handle); 1762 AcpiAttachData(handle, acpi_fake_objhandler, child); 1763 1764 /* 1765 * Check that the device is present. If it's not present, 1766 * leave it disabled (so that we have a device_t attached to 1767 * the handle, but we don't probe it). 1768 * 1769 * XXX PCI link devices sometimes report "present" but not 1770 * "functional" (i.e. if disabled). Go ahead and probe them 1771 * anyway since we may enable them later. 1772 */ 1773 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1774 /* Never disable PCI link devices. */ 1775 if (acpi_MatchHid(handle, "PNP0C0F")) 1776 break; 1777 /* 1778 * Docking stations should remain enabled since the system 1779 * may be undocked at boot. 1780 */ 1781 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1782 break; 1783 1784 device_disable(child); 1785 break; 1786 } 1787 1788 /* 1789 * Get the device's resource settings and attach them. 1790 * Note that if the device has _PRS but no _CRS, we need 1791 * to decide when it's appropriate to try to configure the 1792 * device. Ignore the return value here; it's OK for the 1793 * device not to have any resources. 1794 */ 1795 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1796 break; 1797 } 1798 } 1799 1800 return_ACPI_STATUS (AE_OK); 1801 } 1802 1803 /* 1804 * AcpiAttachData() requires an object handler but never uses it. This is a 1805 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1806 */ 1807 void 1808 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1809 { 1810 } 1811 1812 static void 1813 acpi_shutdown_final(void *arg, int howto) 1814 { 1815 struct acpi_softc *sc; 1816 ACPI_STATUS status; 1817 1818 /* 1819 * XXX Shutdown code should only run on the BSP (cpuid 0). 1820 * Some chipsets do not power off the system correctly if called from 1821 * an AP. 1822 */ 1823 sc = arg; 1824 if ((howto & RB_POWEROFF) != 0) { 1825 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1826 if (ACPI_FAILURE(status)) { 1827 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1828 AcpiFormatException(status)); 1829 return; 1830 } 1831 device_printf(sc->acpi_dev, "Powering system off\n"); 1832 ACPI_DISABLE_IRQS(); 1833 status = AcpiEnterSleepState(ACPI_STATE_S5); 1834 if (ACPI_FAILURE(status)) { 1835 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1836 AcpiFormatException(status)); 1837 } else { 1838 DELAY(1000000); 1839 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1840 } 1841 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1842 /* Reboot using the reset register. */ 1843 status = AcpiReset(); 1844 if (ACPI_FAILURE(status)) { 1845 if (status != AE_NOT_EXIST) 1846 device_printf(sc->acpi_dev, "reset failed - %s\n", 1847 AcpiFormatException(status)); 1848 } else { 1849 DELAY(1000000); 1850 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1851 } 1852 } else if (sc->acpi_do_disable && panicstr == NULL) { 1853 /* 1854 * Only disable ACPI if the user requested. On some systems, writing 1855 * the disable value to SMI_CMD hangs the system. 1856 */ 1857 device_printf(sc->acpi_dev, "Shutting down\n"); 1858 AcpiTerminate(); 1859 } 1860 } 1861 1862 static void 1863 acpi_enable_fixed_events(struct acpi_softc *sc) 1864 { 1865 static int first_time = 1; 1866 1867 /* Enable and clear fixed events and install handlers. */ 1868 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1869 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1870 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1871 acpi_event_power_button_sleep, sc); 1872 if (first_time) 1873 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1874 } 1875 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1876 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1877 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1878 acpi_event_sleep_button_sleep, sc); 1879 if (first_time) 1880 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1881 } 1882 1883 first_time = 0; 1884 } 1885 1886 /* 1887 * Returns true if the device is actually present and should 1888 * be attached to. This requires the present, enabled, UI-visible 1889 * and diagnostics-passed bits to be set. 1890 */ 1891 BOOLEAN 1892 acpi_DeviceIsPresent(device_t dev) 1893 { 1894 ACPI_DEVICE_INFO *devinfo; 1895 ACPI_HANDLE h; 1896 int ret; 1897 1898 ret = FALSE; 1899 if ((h = acpi_get_handle(dev)) == NULL || 1900 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1901 return (FALSE); 1902 1903 /* If no _STA method, must be present */ 1904 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1905 ret = TRUE; 1906 1907 /* Return true for 'present' and 'functioning' */ 1908 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1909 ret = TRUE; 1910 1911 AcpiOsFree(devinfo); 1912 return (ret); 1913 } 1914 1915 /* 1916 * Returns true if the battery is actually present and inserted. 1917 */ 1918 BOOLEAN 1919 acpi_BatteryIsPresent(device_t dev) 1920 { 1921 ACPI_DEVICE_INFO *devinfo; 1922 ACPI_HANDLE h; 1923 int ret; 1924 1925 ret = FALSE; 1926 if ((h = acpi_get_handle(dev)) == NULL || 1927 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1928 return (FALSE); 1929 1930 /* If no _STA method, must be present */ 1931 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1932 ret = TRUE; 1933 1934 /* Return true for 'present', 'battery present', and 'functioning' */ 1935 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1936 ret = TRUE; 1937 1938 AcpiOsFree(devinfo); 1939 return (ret); 1940 } 1941 1942 /* 1943 * Match a HID string against a handle 1944 */ 1945 BOOLEAN 1946 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1947 { 1948 ACPI_DEVICE_INFO *devinfo; 1949 int ret, i; 1950 1951 ret = FALSE; 1952 if (hid == NULL || h == NULL || 1953 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1954 return (ret); 1955 1956 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1957 strcmp(hid, devinfo->HardwareId.String) == 0) 1958 ret = TRUE; 1959 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1960 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1961 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1962 ret = TRUE; 1963 break; 1964 } 1965 } 1966 } 1967 1968 AcpiOsFree(devinfo); 1969 return (ret); 1970 } 1971 1972 /* 1973 * Return the handle of a named object within our scope, ie. that of (parent) 1974 * or one if its parents. 1975 */ 1976 ACPI_STATUS 1977 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1978 { 1979 ACPI_HANDLE r; 1980 ACPI_STATUS status; 1981 1982 /* Walk back up the tree to the root */ 1983 for (;;) { 1984 status = AcpiGetHandle(parent, path, &r); 1985 if (ACPI_SUCCESS(status)) { 1986 *result = r; 1987 return (AE_OK); 1988 } 1989 /* XXX Return error here? */ 1990 if (status != AE_NOT_FOUND) 1991 return (AE_OK); 1992 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1993 return (AE_NOT_FOUND); 1994 parent = r; 1995 } 1996 } 1997 1998 /* 1999 * Allocate a buffer with a preset data size. 2000 */ 2001 ACPI_BUFFER * 2002 acpi_AllocBuffer(int size) 2003 { 2004 ACPI_BUFFER *buf; 2005 2006 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2007 return (NULL); 2008 buf->Length = size; 2009 buf->Pointer = (void *)(buf + 1); 2010 return (buf); 2011 } 2012 2013 ACPI_STATUS 2014 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2015 { 2016 ACPI_OBJECT arg1; 2017 ACPI_OBJECT_LIST args; 2018 2019 arg1.Type = ACPI_TYPE_INTEGER; 2020 arg1.Integer.Value = number; 2021 args.Count = 1; 2022 args.Pointer = &arg1; 2023 2024 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2025 } 2026 2027 /* 2028 * Evaluate a path that should return an integer. 2029 */ 2030 ACPI_STATUS 2031 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2032 { 2033 ACPI_STATUS status; 2034 ACPI_BUFFER buf; 2035 ACPI_OBJECT param; 2036 2037 if (handle == NULL) 2038 handle = ACPI_ROOT_OBJECT; 2039 2040 /* 2041 * Assume that what we've been pointed at is an Integer object, or 2042 * a method that will return an Integer. 2043 */ 2044 buf.Pointer = ¶m; 2045 buf.Length = sizeof(param); 2046 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2047 if (ACPI_SUCCESS(status)) { 2048 if (param.Type == ACPI_TYPE_INTEGER) 2049 *number = param.Integer.Value; 2050 else 2051 status = AE_TYPE; 2052 } 2053 2054 /* 2055 * In some applications, a method that's expected to return an Integer 2056 * may instead return a Buffer (probably to simplify some internal 2057 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2058 * convert it into an Integer as best we can. 2059 * 2060 * This is a hack. 2061 */ 2062 if (status == AE_BUFFER_OVERFLOW) { 2063 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2064 status = AE_NO_MEMORY; 2065 } else { 2066 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2067 if (ACPI_SUCCESS(status)) 2068 status = acpi_ConvertBufferToInteger(&buf, number); 2069 AcpiOsFree(buf.Pointer); 2070 } 2071 } 2072 return (status); 2073 } 2074 2075 ACPI_STATUS 2076 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2077 { 2078 ACPI_OBJECT *p; 2079 UINT8 *val; 2080 int i; 2081 2082 p = (ACPI_OBJECT *)bufp->Pointer; 2083 if (p->Type == ACPI_TYPE_INTEGER) { 2084 *number = p->Integer.Value; 2085 return (AE_OK); 2086 } 2087 if (p->Type != ACPI_TYPE_BUFFER) 2088 return (AE_TYPE); 2089 if (p->Buffer.Length > sizeof(int)) 2090 return (AE_BAD_DATA); 2091 2092 *number = 0; 2093 val = p->Buffer.Pointer; 2094 for (i = 0; i < p->Buffer.Length; i++) 2095 *number += val[i] << (i * 8); 2096 return (AE_OK); 2097 } 2098 2099 /* 2100 * Iterate over the elements of an a package object, calling the supplied 2101 * function for each element. 2102 * 2103 * XXX possible enhancement might be to abort traversal on error. 2104 */ 2105 ACPI_STATUS 2106 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2107 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2108 { 2109 ACPI_OBJECT *comp; 2110 int i; 2111 2112 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2113 return (AE_BAD_PARAMETER); 2114 2115 /* Iterate over components */ 2116 i = 0; 2117 comp = pkg->Package.Elements; 2118 for (; i < pkg->Package.Count; i++, comp++) 2119 func(comp, arg); 2120 2121 return (AE_OK); 2122 } 2123 2124 /* 2125 * Find the (index)th resource object in a set. 2126 */ 2127 ACPI_STATUS 2128 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2129 { 2130 ACPI_RESOURCE *rp; 2131 int i; 2132 2133 rp = (ACPI_RESOURCE *)buf->Pointer; 2134 i = index; 2135 while (i-- > 0) { 2136 /* Range check */ 2137 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2138 return (AE_BAD_PARAMETER); 2139 2140 /* Check for terminator */ 2141 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2142 return (AE_NOT_FOUND); 2143 rp = ACPI_NEXT_RESOURCE(rp); 2144 } 2145 if (resp != NULL) 2146 *resp = rp; 2147 2148 return (AE_OK); 2149 } 2150 2151 /* 2152 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2153 * 2154 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2155 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2156 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2157 * resources. 2158 */ 2159 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2160 2161 ACPI_STATUS 2162 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2163 { 2164 ACPI_RESOURCE *rp; 2165 void *newp; 2166 2167 /* Initialise the buffer if necessary. */ 2168 if (buf->Pointer == NULL) { 2169 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2170 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2171 return (AE_NO_MEMORY); 2172 rp = (ACPI_RESOURCE *)buf->Pointer; 2173 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2174 rp->Length = ACPI_RS_SIZE_MIN; 2175 } 2176 if (res == NULL) 2177 return (AE_OK); 2178 2179 /* 2180 * Scan the current buffer looking for the terminator. 2181 * This will either find the terminator or hit the end 2182 * of the buffer and return an error. 2183 */ 2184 rp = (ACPI_RESOURCE *)buf->Pointer; 2185 for (;;) { 2186 /* Range check, don't go outside the buffer */ 2187 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2188 return (AE_BAD_PARAMETER); 2189 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2190 break; 2191 rp = ACPI_NEXT_RESOURCE(rp); 2192 } 2193 2194 /* 2195 * Check the size of the buffer and expand if required. 2196 * 2197 * Required size is: 2198 * size of existing resources before terminator + 2199 * size of new resource and header + 2200 * size of terminator. 2201 * 2202 * Note that this loop should really only run once, unless 2203 * for some reason we are stuffing a *really* huge resource. 2204 */ 2205 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2206 res->Length + ACPI_RS_SIZE_NO_DATA + 2207 ACPI_RS_SIZE_MIN) >= buf->Length) { 2208 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2209 return (AE_NO_MEMORY); 2210 bcopy(buf->Pointer, newp, buf->Length); 2211 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2212 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2213 AcpiOsFree(buf->Pointer); 2214 buf->Pointer = newp; 2215 buf->Length += buf->Length; 2216 } 2217 2218 /* Insert the new resource. */ 2219 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2220 2221 /* And add the terminator. */ 2222 rp = ACPI_NEXT_RESOURCE(rp); 2223 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2224 rp->Length = ACPI_RS_SIZE_MIN; 2225 2226 return (AE_OK); 2227 } 2228 2229 /* 2230 * Set interrupt model. 2231 */ 2232 ACPI_STATUS 2233 acpi_SetIntrModel(int model) 2234 { 2235 2236 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2237 } 2238 2239 /* 2240 * DEPRECATED. This interface has serious deficiencies and will be 2241 * removed. 2242 * 2243 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2244 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2245 */ 2246 ACPI_STATUS 2247 acpi_SetSleepState(struct acpi_softc *sc, int state) 2248 { 2249 static int once; 2250 2251 if (!once) { 2252 device_printf(sc->acpi_dev, 2253 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2254 once = 1; 2255 } 2256 return (acpi_EnterSleepState(sc, state)); 2257 } 2258 2259 static void 2260 acpi_sleep_force(void *arg) 2261 { 2262 struct acpi_softc *sc; 2263 2264 sc = arg; 2265 device_printf(sc->acpi_dev, 2266 "suspend request timed out, forcing sleep now\n"); 2267 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2268 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2269 sc->acpi_next_sstate); 2270 } 2271 2272 /* 2273 * Request that the system enter the given suspend state. All /dev/apm 2274 * devices and devd(8) will be notified. Userland then has a chance to 2275 * save state and acknowledge the request. The system sleeps once all 2276 * acks are in. 2277 */ 2278 int 2279 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2280 { 2281 #ifdef notyet 2282 struct apm_clone_data *clone; 2283 #endif 2284 2285 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2286 return (EINVAL); 2287 2288 /* S5 (soft-off) should be entered directly with no waiting. */ 2289 if (state == ACPI_STATE_S5) { 2290 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2291 return (0); 2292 else 2293 return (ENXIO); 2294 } 2295 2296 /* This platform does not support acpi suspend/resume. */ 2297 return (EOPNOTSUPP); 2298 2299 /* If a suspend request is already in progress, just return. */ 2300 ACPI_LOCK(acpi); 2301 if (sc->acpi_next_sstate != 0) { 2302 ACPI_UNLOCK(acpi); 2303 return (0); 2304 } 2305 2306 /* Record the pending state and notify all apm devices. */ 2307 sc->acpi_next_sstate = state; 2308 #if 0 2309 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2310 clone->notify_status = APM_EV_NONE; 2311 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2312 KNOTE(&clone->sel_read.si_note, 0); 2313 } 2314 } 2315 #endif 2316 2317 /* If devd(8) is not running, immediately enter the sleep state. */ 2318 if (devctl_process_running() == FALSE) { 2319 ACPI_UNLOCK(acpi); 2320 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2321 return (0); 2322 } else { 2323 return (ENXIO); 2324 } 2325 } 2326 2327 /* Now notify devd(8) also. */ 2328 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2329 2330 /* 2331 * Set a timeout to fire if userland doesn't ack the suspend request 2332 * in time. This way we still eventually go to sleep if we were 2333 * overheating or running low on battery, even if userland is hung. 2334 * We cancel this timeout once all userland acks are in or the 2335 * suspend request is aborted. 2336 */ 2337 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2338 ACPI_UNLOCK(acpi); 2339 return (0); 2340 } 2341 2342 /* 2343 * Acknowledge (or reject) a pending sleep state. The caller has 2344 * prepared for suspend and is now ready for it to proceed. If the 2345 * error argument is non-zero, it indicates suspend should be cancelled 2346 * and gives an errno value describing why. Once all votes are in, 2347 * we suspend the system. 2348 */ 2349 int 2350 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2351 { 2352 struct acpi_softc *sc; 2353 int ret, sleeping; 2354 2355 /* This platform does not support acpi suspend/resume. */ 2356 return (EOPNOTSUPP); 2357 2358 /* If no pending sleep state, return an error. */ 2359 ACPI_LOCK(acpi); 2360 sc = clone->acpi_sc; 2361 if (sc->acpi_next_sstate == 0) { 2362 ACPI_UNLOCK(acpi); 2363 return (ENXIO); 2364 } 2365 2366 /* Caller wants to abort suspend process. */ 2367 if (error) { 2368 sc->acpi_next_sstate = 0; 2369 callout_stop(&sc->susp_force_to); 2370 device_printf(sc->acpi_dev, 2371 "listener on %s cancelled the pending suspend\n", 2372 devtoname(clone->cdev)); 2373 ACPI_UNLOCK(acpi); 2374 return (0); 2375 } 2376 2377 /* 2378 * Mark this device as acking the suspend request. Then, walk through 2379 * all devices, seeing if they agree yet. We only count devices that 2380 * are writable since read-only devices couldn't ack the request. 2381 */ 2382 clone->notify_status = APM_EV_ACKED; 2383 sleeping = TRUE; 2384 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2385 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2386 clone->notify_status != APM_EV_ACKED) { 2387 sleeping = FALSE; 2388 break; 2389 } 2390 } 2391 2392 /* If all devices have voted "yes", we will suspend now. */ 2393 if (sleeping) 2394 callout_stop(&sc->susp_force_to); 2395 ACPI_UNLOCK(acpi); 2396 ret = 0; 2397 if (sleeping) { 2398 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2399 ret = ENODEV; 2400 } 2401 2402 return (ret); 2403 } 2404 2405 static void 2406 acpi_sleep_enable(void *arg) 2407 { 2408 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2409 } 2410 2411 enum acpi_sleep_state { 2412 ACPI_SS_NONE, 2413 ACPI_SS_GPE_SET, 2414 ACPI_SS_DEV_SUSPEND, 2415 ACPI_SS_SLP_PREP, 2416 ACPI_SS_SLEPT, 2417 }; 2418 2419 /* 2420 * Enter the desired system sleep state. 2421 * 2422 * Currently we support S1-S5 but S4 is only S4BIOS 2423 */ 2424 static ACPI_STATUS 2425 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2426 { 2427 ACPI_STATUS status; 2428 UINT8 TypeA; 2429 UINT8 TypeB; 2430 enum acpi_sleep_state slp_state; 2431 2432 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2433 2434 /* Re-entry once we're suspending is not allowed. */ 2435 status = AE_OK; 2436 ACPI_LOCK(acpi); 2437 if (sc->acpi_sleep_disabled) { 2438 ACPI_UNLOCK(acpi); 2439 device_printf(sc->acpi_dev, 2440 "suspend request ignored (not ready yet)\n"); 2441 return (AE_ERROR); 2442 } 2443 sc->acpi_sleep_disabled = 1; 2444 ACPI_UNLOCK(acpi); 2445 2446 /* 2447 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2448 * drivers need this. 2449 */ 2450 //get_mplock(); 2451 slp_state = ACPI_SS_NONE; 2452 switch (state) { 2453 case ACPI_STATE_S1: 2454 case ACPI_STATE_S2: 2455 case ACPI_STATE_S3: 2456 case ACPI_STATE_S4: 2457 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2458 if (status == AE_NOT_FOUND) { 2459 device_printf(sc->acpi_dev, 2460 "Sleep state S%d not supported by BIOS\n", state); 2461 break; 2462 } else if (ACPI_FAILURE(status)) { 2463 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2464 AcpiFormatException(status)); 2465 break; 2466 } 2467 2468 sc->acpi_sstate = state; 2469 2470 /* Enable any GPEs as appropriate and requested by the user. */ 2471 acpi_wake_prep_walk(state); 2472 slp_state = ACPI_SS_GPE_SET; 2473 2474 /* 2475 * Inform all devices that we are going to sleep. If at least one 2476 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2477 * 2478 * XXX Note that a better two-pass approach with a 'veto' pass 2479 * followed by a "real thing" pass would be better, but the current 2480 * bus interface does not provide for this. 2481 */ 2482 if (DEVICE_SUSPEND(root_bus) != 0) { 2483 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2484 break; 2485 } 2486 slp_state = ACPI_SS_DEV_SUSPEND; 2487 2488 /* If testing device suspend only, back out of everything here. */ 2489 if (acpi_susp_bounce) 2490 break; 2491 2492 status = AcpiEnterSleepStatePrep(state); 2493 if (ACPI_FAILURE(status)) { 2494 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2495 AcpiFormatException(status)); 2496 break; 2497 } 2498 slp_state = ACPI_SS_SLP_PREP; 2499 2500 if (sc->acpi_sleep_delay > 0) 2501 DELAY(sc->acpi_sleep_delay * 1000000); 2502 2503 if (state != ACPI_STATE_S1) { 2504 acpi_sleep_machdep(sc, state); 2505 2506 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2507 if (state == ACPI_STATE_S4) 2508 AcpiEnable(); 2509 } else { 2510 ACPI_DISABLE_IRQS(); 2511 status = AcpiEnterSleepState(state); 2512 if (ACPI_FAILURE(status)) { 2513 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2514 AcpiFormatException(status)); 2515 break; 2516 } 2517 } 2518 slp_state = ACPI_SS_SLEPT; 2519 break; 2520 case ACPI_STATE_S5: 2521 /* 2522 * Shut down cleanly and power off. This will call us back through the 2523 * shutdown handlers. 2524 */ 2525 shutdown_nice(RB_POWEROFF); 2526 break; 2527 case ACPI_STATE_S0: 2528 default: 2529 status = AE_BAD_PARAMETER; 2530 break; 2531 } 2532 2533 /* 2534 * Back out state according to how far along we got in the suspend 2535 * process. This handles both the error and success cases. 2536 */ 2537 sc->acpi_next_sstate = 0; 2538 if (slp_state >= ACPI_SS_GPE_SET) { 2539 acpi_wake_prep_walk(state); 2540 sc->acpi_sstate = ACPI_STATE_S0; 2541 } 2542 if (slp_state >= ACPI_SS_SLP_PREP) 2543 AcpiLeaveSleepState(state); 2544 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2545 DEVICE_RESUME(root_bus); 2546 if (slp_state >= ACPI_SS_SLEPT) 2547 acpi_enable_fixed_events(sc); 2548 2549 /* Allow another sleep request after a while. */ 2550 /* XXX: needs timeout */ 2551 if (state != ACPI_STATE_S5) 2552 acpi_sleep_enable(sc); 2553 2554 /* Run /etc/rc.resume after we are back. */ 2555 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2556 2557 //rel_mplock(); 2558 return_ACPI_STATUS (status); 2559 } 2560 2561 /* Enable or disable the device's GPE. */ 2562 int 2563 acpi_wake_set_enable(device_t dev, int enable) 2564 { 2565 struct acpi_prw_data prw; 2566 ACPI_STATUS status; 2567 int flags; 2568 2569 /* Make sure the device supports waking the system and get the GPE. */ 2570 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2571 return (ENXIO); 2572 2573 flags = acpi_get_flags(dev); 2574 if (enable) { 2575 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2576 ACPI_GPE_ENABLE); 2577 if (ACPI_FAILURE(status)) { 2578 device_printf(dev, "enable wake failed\n"); 2579 return (ENXIO); 2580 } 2581 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2582 } else { 2583 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2584 ACPI_GPE_DISABLE); 2585 if (ACPI_FAILURE(status)) { 2586 device_printf(dev, "disable wake failed\n"); 2587 return (ENXIO); 2588 } 2589 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2590 } 2591 2592 return (0); 2593 } 2594 2595 static int 2596 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2597 { 2598 struct acpi_prw_data prw; 2599 device_t dev; 2600 2601 /* Check that this is a wake-capable device and get its GPE. */ 2602 if (acpi_parse_prw(handle, &prw) != 0) 2603 return (ENXIO); 2604 dev = acpi_get_device(handle); 2605 2606 /* 2607 * The destination sleep state must be less than (i.e., higher power) 2608 * or equal to the value specified by _PRW. If this GPE cannot be 2609 * enabled for the next sleep state, then disable it. If it can and 2610 * the user requested it be enabled, turn on any required power resources 2611 * and set _PSW. 2612 */ 2613 if (sstate > prw.lowest_wake) { 2614 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2615 if (bootverbose) 2616 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2617 acpi_name(handle), sstate); 2618 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2619 acpi_pwr_wake_enable(handle, 1); 2620 acpi_SetInteger(handle, "_PSW", 1); 2621 if (bootverbose) 2622 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2623 acpi_name(handle), sstate); 2624 } 2625 2626 return (0); 2627 } 2628 2629 static int 2630 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2631 { 2632 struct acpi_prw_data prw; 2633 device_t dev; 2634 2635 /* 2636 * Check that this is a wake-capable device and get its GPE. Return 2637 * now if the user didn't enable this device for wake. 2638 */ 2639 if (acpi_parse_prw(handle, &prw) != 0) 2640 return (ENXIO); 2641 dev = acpi_get_device(handle); 2642 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2643 return (0); 2644 2645 /* 2646 * If this GPE couldn't be enabled for the previous sleep state, it was 2647 * disabled before going to sleep so re-enable it. If it was enabled, 2648 * clear _PSW and turn off any power resources it used. 2649 */ 2650 if (sstate > prw.lowest_wake) { 2651 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2652 if (bootverbose) 2653 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2654 } else { 2655 acpi_SetInteger(handle, "_PSW", 0); 2656 acpi_pwr_wake_enable(handle, 0); 2657 if (bootverbose) 2658 device_printf(dev, "run_prep cleaned up for %s\n", 2659 acpi_name(handle)); 2660 } 2661 2662 return (0); 2663 } 2664 2665 static ACPI_STATUS 2666 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2667 { 2668 int sstate; 2669 2670 /* If suspending, run the sleep prep function, otherwise wake. */ 2671 sstate = *(int *)context; 2672 if (AcpiGbl_SystemAwakeAndRunning) 2673 acpi_wake_sleep_prep(handle, sstate); 2674 else 2675 acpi_wake_run_prep(handle, sstate); 2676 return (AE_OK); 2677 } 2678 2679 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2680 static int 2681 acpi_wake_prep_walk(int sstate) 2682 { 2683 ACPI_HANDLE sb_handle; 2684 2685 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2686 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2687 acpi_wake_prep, NULL, &sstate, NULL); 2688 } 2689 return (0); 2690 } 2691 2692 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2693 static int 2694 acpi_wake_sysctl_walk(device_t dev) 2695 { 2696 #ifdef notyet 2697 int error, i, numdevs; 2698 device_t *devlist; 2699 device_t child; 2700 ACPI_STATUS status; 2701 2702 error = device_get_children(dev, &devlist, &numdevs); 2703 if (error != 0 || numdevs == 0) { 2704 if (numdevs == 0) 2705 kfree(devlist, M_TEMP); 2706 return (error); 2707 } 2708 for (i = 0; i < numdevs; i++) { 2709 child = devlist[i]; 2710 acpi_wake_sysctl_walk(child); 2711 if (!device_is_attached(child)) 2712 continue; 2713 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2714 if (ACPI_SUCCESS(status)) { 2715 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2716 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2717 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2718 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2719 } 2720 } 2721 kfree(devlist, M_TEMP); 2722 #endif 2723 2724 return (0); 2725 } 2726 2727 #ifdef notyet 2728 /* Enable or disable wake from userland. */ 2729 static int 2730 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2731 { 2732 int enable, error; 2733 device_t dev; 2734 2735 dev = (device_t)arg1; 2736 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2737 2738 error = sysctl_handle_int(oidp, &enable, 0, req); 2739 if (error != 0 || req->newptr == NULL) 2740 return (error); 2741 if (enable != 0 && enable != 1) 2742 return (EINVAL); 2743 2744 return (acpi_wake_set_enable(dev, enable)); 2745 } 2746 #endif 2747 2748 /* Parse a device's _PRW into a structure. */ 2749 int 2750 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2751 { 2752 ACPI_STATUS status; 2753 ACPI_BUFFER prw_buffer; 2754 ACPI_OBJECT *res, *res2; 2755 int error, i, power_count; 2756 2757 if (h == NULL || prw == NULL) 2758 return (EINVAL); 2759 2760 /* 2761 * The _PRW object (7.2.9) is only required for devices that have the 2762 * ability to wake the system from a sleeping state. 2763 */ 2764 error = EINVAL; 2765 prw_buffer.Pointer = NULL; 2766 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2767 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2768 if (ACPI_FAILURE(status)) 2769 return (ENOENT); 2770 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2771 if (res == NULL) 2772 return (ENOENT); 2773 if (!ACPI_PKG_VALID(res, 2)) 2774 goto out; 2775 2776 /* 2777 * Element 1 of the _PRW object: 2778 * The lowest power system sleeping state that can be entered while still 2779 * providing wake functionality. The sleeping state being entered must 2780 * be less than (i.e., higher power) or equal to this value. 2781 */ 2782 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2783 goto out; 2784 2785 /* 2786 * Element 0 of the _PRW object: 2787 */ 2788 switch (res->Package.Elements[0].Type) { 2789 case ACPI_TYPE_INTEGER: 2790 /* 2791 * If the data type of this package element is numeric, then this 2792 * _PRW package element is the bit index in the GPEx_EN, in the 2793 * GPE blocks described in the FADT, of the enable bit that is 2794 * enabled for the wake event. 2795 */ 2796 prw->gpe_handle = NULL; 2797 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2798 error = 0; 2799 break; 2800 case ACPI_TYPE_PACKAGE: 2801 /* 2802 * If the data type of this package element is a package, then this 2803 * _PRW package element is itself a package containing two 2804 * elements. The first is an object reference to the GPE Block 2805 * device that contains the GPE that will be triggered by the wake 2806 * event. The second element is numeric and it contains the bit 2807 * index in the GPEx_EN, in the GPE Block referenced by the 2808 * first element in the package, of the enable bit that is enabled for 2809 * the wake event. 2810 * 2811 * For example, if this field is a package then it is of the form: 2812 * Package() {\_SB.PCI0.ISA.GPE, 2} 2813 */ 2814 res2 = &res->Package.Elements[0]; 2815 if (!ACPI_PKG_VALID(res2, 2)) 2816 goto out; 2817 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2818 if (prw->gpe_handle == NULL) 2819 goto out; 2820 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2821 goto out; 2822 error = 0; 2823 break; 2824 default: 2825 goto out; 2826 } 2827 2828 /* Elements 2 to N of the _PRW object are power resources. */ 2829 power_count = res->Package.Count - 2; 2830 if (power_count > ACPI_PRW_MAX_POWERRES) { 2831 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2832 power_count = 0; 2833 } 2834 prw->power_res_count = power_count; 2835 for (i = 0; i < power_count; i++) 2836 prw->power_res[i] = res->Package.Elements[i]; 2837 2838 out: 2839 if (prw_buffer.Pointer != NULL) 2840 AcpiOsFree(prw_buffer.Pointer); 2841 return (error); 2842 } 2843 2844 /* 2845 * ACPI Event Handlers 2846 */ 2847 2848 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2849 2850 static void 2851 acpi_system_eventhandler_sleep(void *arg, int state) 2852 { 2853 struct acpi_softc *sc; 2854 int ret; 2855 2856 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2857 2858 sc = arg; 2859 2860 /* Check if button action is disabled. */ 2861 if (state == ACPI_S_STATES_MAX + 1) 2862 return; 2863 2864 /* Request that the system prepare to enter the given suspend state. */ 2865 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2866 if (ret != 0) 2867 device_printf(sc->acpi_dev, 2868 "request to enter state S%d failed (err %d)\n", state, ret); 2869 2870 return_VOID; 2871 } 2872 2873 static void 2874 acpi_system_eventhandler_wakeup(void *arg, int state) 2875 { 2876 2877 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2878 2879 /* Currently, nothing to do for wakeup. */ 2880 2881 return_VOID; 2882 } 2883 2884 /* 2885 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2886 */ 2887 UINT32 2888 acpi_event_power_button_sleep(void *context) 2889 { 2890 struct acpi_softc *sc = (struct acpi_softc *)context; 2891 2892 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2893 2894 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2895 2896 return_VALUE (ACPI_INTERRUPT_HANDLED); 2897 } 2898 2899 UINT32 2900 acpi_event_power_button_wake(void *context) 2901 { 2902 struct acpi_softc *sc = (struct acpi_softc *)context; 2903 2904 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2905 2906 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2907 2908 return_VALUE (ACPI_INTERRUPT_HANDLED); 2909 } 2910 2911 UINT32 2912 acpi_event_sleep_button_sleep(void *context) 2913 { 2914 struct acpi_softc *sc = (struct acpi_softc *)context; 2915 2916 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2917 2918 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2919 2920 return_VALUE (ACPI_INTERRUPT_HANDLED); 2921 } 2922 2923 UINT32 2924 acpi_event_sleep_button_wake(void *context) 2925 { 2926 struct acpi_softc *sc = (struct acpi_softc *)context; 2927 2928 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2929 2930 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2931 2932 return_VALUE (ACPI_INTERRUPT_HANDLED); 2933 } 2934 2935 /* 2936 * XXX This static buffer is suboptimal. There is no locking so only 2937 * use this for single-threaded callers. 2938 */ 2939 char * 2940 acpi_name(ACPI_HANDLE handle) 2941 { 2942 ACPI_BUFFER buf; 2943 static char data[256]; 2944 2945 buf.Length = sizeof(data); 2946 buf.Pointer = data; 2947 2948 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2949 return (data); 2950 return ("(unknown)"); 2951 } 2952 2953 /* 2954 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2955 * parts of the namespace. 2956 */ 2957 int 2958 acpi_avoid(ACPI_HANDLE handle) 2959 { 2960 char *cp, *env, *np; 2961 int len; 2962 2963 np = acpi_name(handle); 2964 if (*np == '\\') 2965 np++; 2966 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2967 return (0); 2968 2969 /* Scan the avoid list checking for a match */ 2970 cp = env; 2971 for (;;) { 2972 while (*cp != 0 && isspace(*cp)) 2973 cp++; 2974 if (*cp == 0) 2975 break; 2976 len = 0; 2977 while (cp[len] != 0 && !isspace(cp[len])) 2978 len++; 2979 if (!strncmp(cp, np, len)) { 2980 kfreeenv(env); 2981 return(1); 2982 } 2983 cp += len; 2984 } 2985 kfreeenv(env); 2986 2987 return (0); 2988 } 2989 2990 /* 2991 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2992 */ 2993 int 2994 acpi_disabled(char *subsys) 2995 { 2996 char *cp, *env; 2997 int len; 2998 2999 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3000 return (0); 3001 if (strcmp(env, "all") == 0) { 3002 kfreeenv(env); 3003 return (1); 3004 } 3005 3006 /* Scan the disable list, checking for a match. */ 3007 cp = env; 3008 for (;;) { 3009 while (*cp != '\0' && isspace(*cp)) 3010 cp++; 3011 if (*cp == '\0') 3012 break; 3013 len = 0; 3014 while (cp[len] != '\0' && !isspace(cp[len])) 3015 len++; 3016 if (strncmp(cp, subsys, len) == 0) { 3017 kfreeenv(env); 3018 return (1); 3019 } 3020 cp += len; 3021 } 3022 kfreeenv(env); 3023 3024 return (0); 3025 } 3026 3027 /* 3028 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3029 * components are enabled by default. The ones that are not have to be 3030 * enabled via debug.acpi.enabled. 3031 */ 3032 int 3033 acpi_enabled(char *subsys) 3034 { 3035 char *cp, *env; 3036 int len; 3037 3038 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3039 return (0); 3040 if (strcmp(env, "all") == 0) { 3041 kfreeenv(env); 3042 return (1); 3043 } 3044 3045 /* Scan the enable list, checking for a match. */ 3046 cp = env; 3047 for (;;) { 3048 while (*cp != '\0' && isspace(*cp)) 3049 cp++; 3050 if (*cp == '\0') 3051 break; 3052 len = 0; 3053 while (cp[len] != '\0' && !isspace(cp[len])) 3054 len++; 3055 if (strncmp(cp, subsys, len) == 0) { 3056 kfreeenv(env); 3057 return (1); 3058 } 3059 cp += len; 3060 } 3061 kfreeenv(env); 3062 3063 return (0); 3064 } 3065 3066 /* 3067 * Control interface. 3068 * 3069 * We multiplex ioctls for all participating ACPI devices here. Individual 3070 * drivers wanting to be accessible via /dev/acpi should use the 3071 * register/deregister interface to make their handlers visible. 3072 */ 3073 struct acpi_ioctl_hook 3074 { 3075 TAILQ_ENTRY(acpi_ioctl_hook) link; 3076 u_long cmd; 3077 acpi_ioctl_fn fn; 3078 void *arg; 3079 }; 3080 3081 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3082 static int acpi_ioctl_hooks_initted; 3083 3084 int 3085 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3086 { 3087 struct acpi_ioctl_hook *hp; 3088 3089 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3090 return (ENOMEM); 3091 hp->cmd = cmd; 3092 hp->fn = fn; 3093 hp->arg = arg; 3094 3095 ACPI_LOCK(acpi); 3096 if (acpi_ioctl_hooks_initted == 0) { 3097 TAILQ_INIT(&acpi_ioctl_hooks); 3098 acpi_ioctl_hooks_initted = 1; 3099 } 3100 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3101 ACPI_UNLOCK(acpi); 3102 3103 return (0); 3104 } 3105 3106 void 3107 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3108 { 3109 struct acpi_ioctl_hook *hp; 3110 3111 ACPI_LOCK(acpi); 3112 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3113 if (hp->cmd == cmd && hp->fn == fn) 3114 break; 3115 3116 if (hp != NULL) { 3117 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3118 kfree(hp, M_ACPIDEV); 3119 } 3120 ACPI_UNLOCK(acpi); 3121 } 3122 3123 static int 3124 acpiopen(struct dev_open_args *ap) 3125 { 3126 return (0); 3127 } 3128 3129 static int 3130 acpiclose(struct dev_close_args *ap) 3131 { 3132 return (0); 3133 } 3134 3135 static int 3136 acpiioctl(struct dev_ioctl_args *ap) 3137 { 3138 struct acpi_softc *sc; 3139 struct acpi_ioctl_hook *hp; 3140 int error, state; 3141 3142 error = 0; 3143 hp = NULL; 3144 sc = ap->a_head.a_dev->si_drv1; 3145 3146 /* 3147 * Scan the list of registered ioctls, looking for handlers. 3148 */ 3149 ACPI_LOCK(acpi); 3150 if (acpi_ioctl_hooks_initted) 3151 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3152 if (hp->cmd == ap->a_cmd) 3153 break; 3154 } 3155 ACPI_UNLOCK(acpi); 3156 if (hp) 3157 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3158 3159 /* 3160 * Core ioctls are not permitted for non-writable user. 3161 * Currently, other ioctls just fetch information. 3162 * Not changing system behavior. 3163 */ 3164 if ((ap->a_fflag & FWRITE) == 0) 3165 return (EPERM); 3166 3167 /* Core system ioctls. */ 3168 switch (ap->a_cmd) { 3169 case ACPIIO_REQSLPSTATE: 3170 state = *(int *)ap->a_data; 3171 if (state != ACPI_STATE_S5) 3172 error = acpi_ReqSleepState(sc, state); 3173 else { 3174 device_printf(sc->acpi_dev, 3175 "power off via acpi ioctl not supported\n"); 3176 error = ENXIO; 3177 } 3178 break; 3179 case ACPIIO_ACKSLPSTATE: 3180 error = EOPNOTSUPP; 3181 #if 0 /* notyet */ 3182 error = *(int *)ap->a_data; 3183 error = acpi_AckSleepState(sc->acpi_clone, error); 3184 #endif 3185 break; 3186 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3187 error = EINVAL; 3188 state = *(int *)ap->a_data; 3189 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3190 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3191 error = 0; 3192 break; 3193 case ACPIIO_DO_MCALL: 3194 if (acpi_allow_mcall == 1) { 3195 struct acpi_mcall_ioctl_arg *params; 3196 ACPI_BUFFER result = { ACPI_ALLOCATE_BUFFER, NULL }; 3197 ACPI_OBJECT *resobj; 3198 3199 error = EINVAL; 3200 params = (struct acpi_mcall_ioctl_arg *)ap->a_data; 3201 params->retval = AcpiEvaluateObject(NULL, params->path, 3202 ¶ms->args, &result); 3203 if (ACPI_SUCCESS(params->retval) && result.Pointer != NULL && 3204 params->result.Pointer != NULL) { 3205 params->result.Length = min(params->result.Length, 3206 result.Length); 3207 copyout(result.Pointer, params->result.Pointer, 3208 params->result.Length); 3209 params->reslen = result.Length; 3210 if (result.Length >= sizeof(ACPI_OBJECT)) { 3211 resobj = (ACPI_OBJECT *)params->result.Pointer; 3212 switch (resobj->Type) { 3213 case ACPI_TYPE_STRING: 3214 resobj->String.Pointer = (char *) 3215 ((UINT8 *)(resobj->String.Pointer) - 3216 (UINT8 *)result.Pointer + 3217 (UINT8 *)resobj); 3218 break; 3219 case ACPI_TYPE_BUFFER: 3220 resobj->Buffer.Pointer -= (UINT8 *)result.Pointer - 3221 (UINT8 *)resobj; 3222 break; 3223 } 3224 } 3225 error = 0; 3226 } 3227 if (result.Pointer != NULL) 3228 AcpiOsFree(result.Pointer); 3229 } else { 3230 device_printf(sc->acpi_dev, 3231 "debug.acpi.allow_method_calls must be set\n"); 3232 error = ENXIO; 3233 } 3234 break; 3235 default: 3236 error = ENXIO; 3237 break; 3238 } 3239 return (error); 3240 } 3241 3242 static int 3243 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3244 { 3245 int error; 3246 struct sbuf sb; 3247 UINT8 state, TypeA, TypeB; 3248 3249 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3250 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3251 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3252 sbuf_printf(&sb, "S%d ", state); 3253 sbuf_trim(&sb); 3254 sbuf_finish(&sb); 3255 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3256 sbuf_delete(&sb); 3257 return (error); 3258 } 3259 3260 static int 3261 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3262 { 3263 char sleep_state[10]; 3264 int error; 3265 u_int new_state, old_state; 3266 3267 old_state = *(u_int *)oidp->oid_arg1; 3268 if (old_state > ACPI_S_STATES_MAX + 1) 3269 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3270 else 3271 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3272 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3273 if (error == 0 && req->newptr != NULL) { 3274 new_state = ACPI_STATE_S0; 3275 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3276 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3277 break; 3278 if (new_state <= ACPI_S_STATES_MAX + 1) { 3279 if (new_state != old_state) 3280 *(u_int *)oidp->oid_arg1 = new_state; 3281 } else 3282 error = EINVAL; 3283 } 3284 3285 return (error); 3286 } 3287 3288 /* Inform devctl(4) when we receive a Notify. */ 3289 void 3290 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3291 { 3292 char notify_buf[16]; 3293 ACPI_BUFFER handle_buf; 3294 ACPI_STATUS status; 3295 3296 if (subsystem == NULL) 3297 return; 3298 3299 handle_buf.Pointer = NULL; 3300 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3301 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3302 if (ACPI_FAILURE(status)) 3303 return; 3304 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3305 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3306 AcpiOsFree(handle_buf.Pointer); 3307 } 3308 3309 #ifdef ACPI_DEBUG 3310 /* 3311 * Support for parsing debug options from the kernel environment. 3312 * 3313 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3314 * by specifying the names of the bits in the debug.acpi.layer and 3315 * debug.acpi.level environment variables. Bits may be unset by 3316 * prefixing the bit name with !. 3317 */ 3318 struct debugtag 3319 { 3320 char *name; 3321 UINT32 value; 3322 }; 3323 3324 static struct debugtag dbg_layer[] = { 3325 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3326 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3327 {"ACPI_EVENTS", ACPI_EVENTS}, 3328 {"ACPI_TABLES", ACPI_TABLES}, 3329 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3330 {"ACPI_PARSER", ACPI_PARSER}, 3331 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3332 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3333 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3334 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3335 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3336 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3337 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3338 3339 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3340 {"ACPI_BATTERY", ACPI_BATTERY}, 3341 {"ACPI_BUS", ACPI_BUS}, 3342 {"ACPI_BUTTON", ACPI_BUTTON}, 3343 {"ACPI_EC", ACPI_EC}, 3344 {"ACPI_FAN", ACPI_FAN}, 3345 {"ACPI_POWERRES", ACPI_POWERRES}, 3346 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3347 {"ACPI_THERMAL", ACPI_THERMAL}, 3348 {"ACPI_TIMER", ACPI_TIMER}, 3349 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3350 {NULL, 0} 3351 }; 3352 3353 static struct debugtag dbg_level[] = { 3354 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3355 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3356 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3357 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3358 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3359 3360 /* Trace verbosity level 1 [Standard Trace Level] */ 3361 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3362 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3363 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3364 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3365 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3366 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3367 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3368 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3369 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3370 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3371 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3372 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3373 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3374 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3375 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3376 3377 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3378 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3379 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3380 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3381 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3382 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3383 3384 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3385 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3386 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3387 {"ACPI_LV_IO", ACPI_LV_IO}, 3388 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3389 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3390 3391 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3392 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3393 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3394 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3395 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3396 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3397 {NULL, 0} 3398 }; 3399 3400 static void 3401 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3402 { 3403 char *ep; 3404 int i, l; 3405 int set; 3406 3407 while (*cp) { 3408 if (isspace(*cp)) { 3409 cp++; 3410 continue; 3411 } 3412 ep = cp; 3413 while (*ep && !isspace(*ep)) 3414 ep++; 3415 if (*cp == '!') { 3416 set = 0; 3417 cp++; 3418 if (cp == ep) 3419 continue; 3420 } else { 3421 set = 1; 3422 } 3423 l = ep - cp; 3424 for (i = 0; tag[i].name != NULL; i++) { 3425 if (!strncmp(cp, tag[i].name, l)) { 3426 if (set) 3427 *flag |= tag[i].value; 3428 else 3429 *flag &= ~tag[i].value; 3430 } 3431 } 3432 cp = ep; 3433 } 3434 } 3435 3436 static void 3437 acpi_set_debugging(void *junk) 3438 { 3439 char *layer, *level; 3440 3441 if (cold) { 3442 AcpiDbgLayer = 0; 3443 AcpiDbgLevel = 0; 3444 } 3445 3446 layer = kgetenv("debug.acpi.layer"); 3447 level = kgetenv("debug.acpi.level"); 3448 if (layer == NULL && level == NULL) 3449 return; 3450 3451 kprintf("ACPI set debug"); 3452 if (layer != NULL) { 3453 if (strcmp("NONE", layer) != 0) 3454 kprintf(" layer '%s'", layer); 3455 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3456 kfreeenv(layer); 3457 } 3458 if (level != NULL) { 3459 if (strcmp("NONE", level) != 0) 3460 kprintf(" level '%s'", level); 3461 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3462 kfreeenv(level); 3463 } 3464 kprintf("\n"); 3465 } 3466 3467 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3468 NULL); 3469 3470 static int 3471 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3472 { 3473 int error, *dbg; 3474 struct debugtag *tag; 3475 struct sbuf sb; 3476 3477 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3478 return (ENOMEM); 3479 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3480 tag = &dbg_layer[0]; 3481 dbg = &AcpiDbgLayer; 3482 } else { 3483 tag = &dbg_level[0]; 3484 dbg = &AcpiDbgLevel; 3485 } 3486 3487 /* Get old values if this is a get request. */ 3488 ACPI_SERIAL_BEGIN(acpi); 3489 if (*dbg == 0) { 3490 sbuf_cpy(&sb, "NONE"); 3491 } else if (req->newptr == NULL) { 3492 for (; tag->name != NULL; tag++) { 3493 if ((*dbg & tag->value) == tag->value) 3494 sbuf_printf(&sb, "%s ", tag->name); 3495 } 3496 } 3497 sbuf_trim(&sb); 3498 sbuf_finish(&sb); 3499 3500 /* Copy out the old values to the user. */ 3501 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3502 sbuf_delete(&sb); 3503 3504 /* If the user is setting a string, parse it. */ 3505 if (error == 0 && req->newptr != NULL) { 3506 *dbg = 0; 3507 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3508 acpi_set_debugging(NULL); 3509 } 3510 ACPI_SERIAL_END(acpi); 3511 3512 return (error); 3513 } 3514 3515 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3516 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3517 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3518 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3519 #endif /* ACPI_DEBUG */ 3520 3521 static int 3522 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3523 { 3524 int error; 3525 int old; 3526 3527 old = acpi_debug_objects; 3528 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3529 if (error != 0 || req->newptr == NULL) 3530 return (error); 3531 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3532 return (0); 3533 3534 ACPI_SERIAL_BEGIN(acpi); 3535 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3536 ACPI_SERIAL_END(acpi); 3537 3538 return (0); 3539 } 3540 3541 3542 static int 3543 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3544 { 3545 char *p; 3546 size_t len; 3547 int i, j; 3548 3549 p = str; 3550 while (isspace(*p) || *p == ',') 3551 p++; 3552 len = strlen(p); 3553 if (len == 0) 3554 return (0); 3555 p = kstrdup(p, M_TEMP); 3556 for (i = 0; i < len; i++) 3557 if (p[i] == ',') 3558 p[i] = '\0'; 3559 i = j = 0; 3560 while (i < len) 3561 if (isspace(p[i]) || p[i] == '\0') 3562 i++; 3563 else { 3564 i += strlen(p + i) + 1; 3565 j++; 3566 } 3567 if (j == 0) { 3568 kfree(p, M_TEMP); 3569 return (0); 3570 } 3571 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3572 iface->num = j; 3573 i = j = 0; 3574 while (i < len) 3575 if (isspace(p[i]) || p[i] == '\0') 3576 i++; 3577 else { 3578 iface->data[j] = p + i; 3579 i += strlen(p + i) + 1; 3580 j++; 3581 } 3582 3583 return (j); 3584 } 3585 3586 static void 3587 acpi_free_interfaces(struct acpi_interface *iface) 3588 { 3589 kfree(iface->data[0], M_TEMP); 3590 kfree(iface->data, M_TEMP); 3591 } 3592 3593 static void 3594 acpi_reset_interfaces(device_t dev) 3595 { 3596 struct acpi_interface list; 3597 ACPI_STATUS status; 3598 int i; 3599 3600 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3601 for (i = 0; i < list.num; i++) { 3602 status = AcpiInstallInterface(list.data[i]); 3603 if (ACPI_FAILURE(status)) 3604 device_printf(dev, 3605 "failed to install _OSI(\"%s\"): %s\n", 3606 list.data[i], AcpiFormatException(status)); 3607 else if (bootverbose) 3608 device_printf(dev, "installed _OSI(\"%s\")\n", 3609 list.data[i]); 3610 } 3611 acpi_free_interfaces(&list); 3612 } 3613 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3614 for (i = 0; i < list.num; i++) { 3615 status = AcpiRemoveInterface(list.data[i]); 3616 if (ACPI_FAILURE(status)) 3617 device_printf(dev, 3618 "failed to remove _OSI(\"%s\"): %s\n", 3619 list.data[i], AcpiFormatException(status)); 3620 else if (bootverbose) 3621 device_printf(dev, "removed _OSI(\"%s\")\n", 3622 list.data[i]); 3623 } 3624 acpi_free_interfaces(&list); 3625 } 3626 } 3627 3628 static int 3629 acpi_pm_func(u_long cmd, void *arg, ...) 3630 { 3631 int state, acpi_state; 3632 int error; 3633 struct acpi_softc *sc; 3634 va_list ap; 3635 3636 error = 0; 3637 switch (cmd) { 3638 case POWER_CMD_SUSPEND: 3639 sc = (struct acpi_softc *)arg; 3640 if (sc == NULL) { 3641 error = EINVAL; 3642 goto out; 3643 } 3644 3645 va_start(ap, arg); 3646 state = va_arg(ap, int); 3647 va_end(ap); 3648 3649 switch (state) { 3650 case POWER_SLEEP_STATE_STANDBY: 3651 acpi_state = sc->acpi_standby_sx; 3652 break; 3653 case POWER_SLEEP_STATE_SUSPEND: 3654 acpi_state = sc->acpi_suspend_sx; 3655 break; 3656 case POWER_SLEEP_STATE_HIBERNATE: 3657 acpi_state = ACPI_STATE_S4; 3658 break; 3659 default: 3660 error = EINVAL; 3661 goto out; 3662 } 3663 3664 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3665 error = ENXIO; 3666 break; 3667 default: 3668 error = EINVAL; 3669 goto out; 3670 } 3671 3672 out: 3673 return (error); 3674 } 3675 3676 static void 3677 acpi_pm_register(void *arg) 3678 { 3679 if (!cold || resource_disabled("acpi", 0)) 3680 return; 3681 3682 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3683 } 3684 3685 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3686