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