1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/device.h> 48 #include <sys/spinlock.h> 49 #include <sys/spinlock2.h> 50 #include <sys/uuid.h> 51 52 #include <sys/rman.h> 53 #include <bus/isa/isavar.h> 54 #include <bus/isa/pnpvar.h> 55 56 #include "acpi.h" 57 #include <dev/acpica/acpivar.h> 58 #include <dev/acpica/acpiio.h> 59 #include <dev/acpica/acpiio_mcall.h> 60 #include "achware.h" 61 #include "acnamesp.h" 62 #include "acglobal.h" 63 64 #include "pci_if.h" 65 #include <bus/pci/pci_cfgreg.h> 66 #include <bus/pci/pcivar.h> 67 #include <bus/pci/pci_private.h> 68 69 #include <vm/vm_param.h> 70 71 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 72 73 /* Hooks for the ACPICA debugging infrastructure */ 74 #define _COMPONENT ACPI_BUS 75 ACPI_MODULE_NAME("ACPI"); 76 77 static d_open_t acpiopen; 78 static d_close_t acpiclose; 79 static d_ioctl_t acpiioctl; 80 81 static struct dev_ops acpi_ops = { 82 { "acpi", 0, D_MPSAFE }, 83 .d_open = acpiopen, 84 .d_close = acpiclose, 85 .d_ioctl = acpiioctl 86 }; 87 88 struct acpi_interface { 89 ACPI_STRING *data; 90 int num; 91 }; 92 93 /* Global mutex for locking access to the ACPI subsystem. */ 94 struct lock acpi_lock; 95 struct lwkt_token acpi_token = LWKT_TOKEN_INITIALIZER(acpi_token); 96 97 /* Bitmap of device quirks. */ 98 int acpi_quirks; 99 100 static int acpi_modevent(struct module *mod, int event, void *junk); 101 static void acpi_identify(driver_t *driver, device_t parent); 102 static int acpi_probe(device_t dev); 103 static int acpi_attach(device_t dev); 104 static int acpi_suspend(device_t dev); 105 static int acpi_resume(device_t dev); 106 static int acpi_shutdown(device_t dev); 107 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 108 int unit); 109 static int acpi_print_child(device_t bus, device_t child); 110 static void acpi_probe_nomatch(device_t bus, device_t child); 111 static void acpi_driver_added(device_t dev, driver_t *driver); 112 static int acpi_read_ivar(device_t dev, device_t child, int index, 113 uintptr_t *result); 114 static int acpi_write_ivar(device_t dev, device_t child, int index, 115 uintptr_t value); 116 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 117 static int acpi_sysres_alloc(device_t dev); 118 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 119 int type, int *rid, u_long start, u_long end, 120 u_long count, u_int flags, int cpuid); 121 static int acpi_release_resource(device_t bus, device_t child, int type, 122 int rid, struct resource *r); 123 static void acpi_delete_resource(device_t bus, device_t child, int type, 124 int rid); 125 static uint32_t acpi_isa_get_logicalid(device_t dev); 126 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 127 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 128 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 129 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 130 ACPI_BUFFER *ret); 131 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 132 int *dstate); 133 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 134 void *context, void **retval); 135 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 136 int max_depth, acpi_scan_cb_t user_fn, void *arg); 137 static int acpi_set_powerstate_method(device_t bus, device_t child, 138 int state); 139 static int acpi_isa_pnp_probe(device_t bus, device_t child, 140 struct isa_pnp_id *ids); 141 static void acpi_probe_children(device_t bus); 142 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 143 static void acpi_disable_not_present(device_t child); 144 static void acpi_reprobe_children(device_t bus, device_t *children, 145 int cnt); 146 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 147 void *context, void **status); 148 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 149 static void acpi_shutdown_final(void *arg, int howto); 150 static void acpi_enable_fixed_events(struct acpi_softc *sc); 151 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 152 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 153 static int acpi_wake_prep_walk(int sstate); 154 static int acpi_wake_sysctl_walk(device_t dev); 155 #ifdef notyet 156 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 157 #endif 158 static void acpi_system_eventhandler_sleep(void *arg, int state); 159 static void acpi_system_eventhandler_wakeup(void *arg, int state); 160 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 161 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 162 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS); 163 static int acpi_pm_func(u_long cmd, void *arg, ...); 164 static int acpi_child_location_str_method(device_t acdev, device_t child, 165 char *buf, size_t buflen); 166 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 167 char *buf, size_t buflen); 168 static void acpi_enable_pcie(void); 169 static void acpi_reset_interfaces(device_t dev); 170 171 static device_method_t acpi_methods[] = { 172 /* Device interface */ 173 DEVMETHOD(device_identify, acpi_identify), 174 DEVMETHOD(device_probe, acpi_probe), 175 DEVMETHOD(device_attach, acpi_attach), 176 DEVMETHOD(device_shutdown, acpi_shutdown), 177 DEVMETHOD(device_detach, bus_generic_detach), 178 DEVMETHOD(device_suspend, acpi_suspend), 179 DEVMETHOD(device_resume, acpi_resume), 180 181 /* Bus interface */ 182 DEVMETHOD(bus_add_child, acpi_add_child), 183 DEVMETHOD(bus_print_child, acpi_print_child), 184 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 185 DEVMETHOD(bus_driver_added, acpi_driver_added), 186 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 187 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 188 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 189 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 190 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 191 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 192 DEVMETHOD(bus_release_resource, acpi_release_resource), 193 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 194 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 195 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 196 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 197 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 198 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 199 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 200 201 /* ACPI bus */ 202 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 203 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 204 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 205 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 206 207 /* PCI emulation */ 208 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 209 210 /* ISA emulation */ 211 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 212 213 DEVMETHOD_END 214 }; 215 216 static driver_t acpi_driver = { 217 "acpi", 218 acpi_methods, 219 sizeof(struct acpi_softc), 220 .gpri = KOBJ_GPRI_ACPI+2 221 }; 222 223 static devclass_t acpi_devclass; 224 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 225 MODULE_VERSION(acpi, 1); 226 227 ACPI_SERIAL_DECL(acpi, "ACPI serializer"); 228 229 /* Local pools for managing system resources for ACPI child devices. */ 230 static struct rman acpi_rman_io, acpi_rman_mem; 231 232 #define ACPI_MINIMUM_AWAKETIME 5 233 234 static const char* sleep_state_names[] = { 235 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 236 237 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 238 static char acpi_ca_version[12]; 239 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 240 acpi_ca_version, 0, "Version of Intel ACPICA"); 241 242 /* 243 * Allow overriding _OSI methods. 244 */ 245 static char acpi_install_interface[256]; 246 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 247 sizeof(acpi_install_interface)); 248 static char acpi_remove_interface[256]; 249 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 250 sizeof(acpi_remove_interface)); 251 252 /* 253 * Use this tunable to disable the control method auto-serialization 254 * mechanism that was added in 20140214 and superseded the previous 255 * AcpiGbl_SerializeAllMethods global. 256 */ 257 static int acpi_auto_serialize_methods = 1; 258 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 259 260 /* Allow users to dump Debug objects without ACPI debugger. */ 261 static int acpi_debug_objects; 262 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 263 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 264 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 265 "Enable Debug objects."); 266 267 /* Allow ignoring the XSDT. */ 268 static int acpi_ignore_xsdt; 269 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt); 270 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD, 271 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT."); 272 273 /* Allow the interpreter to ignore common mistakes in BIOS. */ 274 static int acpi_interpreter_slack = 1; 275 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 276 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 277 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 278 279 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */ 280 static int acpi_fadt_addr32; 281 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32); 282 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD, 283 &acpi_fadt_addr32, 1, 284 "Prefer 32-bit FADT register addresses over 64-bit ones."); 285 286 /* Prefer 32-bit FACS table addresses over the 64-bit ones. */ 287 static int acpi_facs_addr32 = 1; 288 TUNABLE_INT("debug.acpi.facs_addr32", &acpi_facs_addr32); 289 SYSCTL_INT(_debug_acpi, OID_AUTO, facs_addr32, CTLFLAG_RD, 290 &acpi_facs_addr32, 1, 291 "Prefer 32-bit FACS table addresses over 64-bit ones."); 292 293 static int acpi_group_module_level_code; 294 TUNABLE_INT("debug.acpi.group_module_level_code", &acpi_group_module_level_code); 295 SYSCTL_INT(_debug_acpi, OID_AUTO, group_module_level_code, CTLFLAG_RD, 296 &acpi_group_module_level_code, 1, 297 "Group module-level code."); 298 299 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 300 static int acpi_do_powerstate = 1; 301 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 302 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 303 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 304 305 /* Allow users to override quirks. */ 306 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 307 308 /* Allow to call ACPI methods from userland. */ 309 static int acpi_allow_mcall; 310 TUNABLE_INT("debug.acpi.allow_method_calls", &acpi_allow_mcall); 311 312 static int acpi_susp_bounce; 313 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 314 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 315 316 /* 317 * ACPI can only be loaded as a module by the loader; activating it after 318 * system bootstrap time is not useful, and can be fatal to the system. 319 * It also cannot be unloaded, since the entire system bus heirarchy hangs 320 * off it. 321 */ 322 static int 323 acpi_modevent(struct module *mod, int event, void *junk) 324 { 325 switch (event) { 326 case MOD_LOAD: 327 if (!cold) { 328 kprintf("The ACPI driver cannot be loaded after boot.\n"); 329 return (EPERM); 330 } 331 break; 332 case MOD_UNLOAD: 333 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 334 return (EBUSY); 335 break; 336 default: 337 break; 338 } 339 return (0); 340 } 341 342 /* 343 * Perform early initialization. 344 */ 345 ACPI_STATUS 346 acpi_Startup(void) 347 { 348 static int started = 0; 349 ACPI_STATUS status; 350 int val; 351 352 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 353 354 /* Only run the startup code once. The MADT driver also calls this. */ 355 if (started) 356 return_VALUE (AE_OK); 357 started = 1; 358 359 /* Start up the ACPICA subsystem. */ 360 status = AcpiInitializeSubsystem(); 361 if (ACPI_FAILURE(status)) { 362 kprintf("ACPI: Subsystem initialization failed: %s\n", 363 AcpiFormatException(status)); 364 return_VALUE (status); 365 } 366 367 /* 368 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 369 * if more tables exist. 370 */ 371 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 372 kprintf("ACPI: Table initialization failed: %s\n", 373 AcpiFormatException(status)); 374 return_VALUE (status); 375 } 376 377 /* Set up any quirks we have for this system. */ 378 if (acpi_quirks == ACPI_Q_OK) 379 acpi_table_quirks(&acpi_quirks); 380 381 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 382 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 383 acpi_quirks &= ~ACPI_Q_BROKEN; 384 if (acpi_quirks & ACPI_Q_BROKEN) { 385 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 386 status = AE_SUPPORT; 387 } 388 389 return_VALUE (status); 390 } 391 392 /* 393 * Detect ACPI, perform early initialisation 394 */ 395 static void 396 acpi_identify(driver_t *driver, device_t parent) 397 { 398 device_t child; 399 400 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 401 402 if (!cold) 403 return_VOID; 404 405 /* Check that we haven't been disabled with a hint. */ 406 if (resource_disabled("acpi", 0)) 407 return_VOID; 408 409 /* Make sure we're not being doubly invoked. */ 410 if (device_find_child(parent, "acpi", 0) != NULL) 411 return_VOID; 412 413 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 414 415 /* Initialize root tables. */ 416 if (ACPI_FAILURE(acpi_Startup())) { 417 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 418 return_VOID; 419 } 420 421 /* Attach the actual ACPI device. */ 422 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 423 device_printf(parent, "device_identify failed\n"); 424 return_VOID; 425 } 426 } 427 428 /* 429 * Fetch some descriptive data from ACPI to put in our attach message. 430 */ 431 static int 432 acpi_probe(device_t dev) 433 { 434 ACPI_TABLE_RSDP *rsdp; 435 ACPI_TABLE_HEADER *rsdt; 436 ACPI_PHYSICAL_ADDRESS paddr; 437 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 438 struct sbuf sb; 439 440 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 441 442 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 443 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 444 device_printf(dev, "probe failed, other PM system enabled.\n"); 445 return_VALUE (ENXIO); 446 } 447 448 if ((paddr = AcpiOsGetRootPointer()) == 0 || 449 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 450 return_VALUE (ENXIO); 451 if (acpi_ignore_xsdt == 0 && 452 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 453 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 454 else 455 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 456 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 457 458 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 459 return_VALUE (ENXIO); 460 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 461 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 462 sbuf_trim(&sb); 463 sbuf_putc(&sb, ' '); 464 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 465 sbuf_trim(&sb); 466 sbuf_finish(&sb); 467 device_set_desc_copy(dev, sbuf_data(&sb)); 468 sbuf_delete(&sb); 469 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 470 471 return_VALUE (0); 472 } 473 474 static int 475 acpi_attach(device_t dev) 476 { 477 struct acpi_softc *sc; 478 ACPI_STATUS status; 479 int error, state; 480 UINT32 flags; 481 UINT8 TypeA, TypeB; 482 char *env; 483 484 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 485 486 sc = device_get_softc(dev); 487 sc->acpi_dev = dev; 488 callout_init(&sc->susp_force_to); 489 490 if ((error = acpi_task_thread_init())) { 491 device_printf(dev, "Could not start task thread.\n"); 492 goto out2; 493 } 494 495 error = ENXIO; 496 497 /* Initialize resource manager. */ 498 acpi_rman_io.rm_type = RMAN_ARRAY; 499 acpi_rman_io.rm_start = 0; 500 acpi_rman_io.rm_end = 0xffff; 501 acpi_rman_io.rm_descr = "ACPI I/O ports"; 502 if (rman_init(&acpi_rman_io, -1) != 0) 503 panic("acpi rman_init IO ports failed"); 504 acpi_rman_mem.rm_type = RMAN_ARRAY; 505 acpi_rman_mem.rm_start = 0; 506 acpi_rman_mem.rm_end = ~0ul; 507 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 508 if (rman_init(&acpi_rman_mem, -1) != 0) 509 panic("acpi rman_init memory failed"); 510 511 /* Initialise the ACPI mutex */ 512 ACPI_LOCK_INIT(acpi, "acpi"); 513 ACPI_SERIAL_INIT(acpi); 514 515 ACPI_LOCK(acpi); 516 517 /* 518 * Set the globals from our tunables. This is needed because ACPICA 519 * uses UINT8 for some values and we have no tunable_byte. 520 */ 521 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 522 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE; 523 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 524 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 525 AcpiGbl_ExecuteTablesAsMethods = acpi_group_module_level_code ? 526 FALSE : TRUE; 527 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE; 528 AcpiGbl_Use32BitFacsAddresses = acpi_facs_addr32 ? TRUE : FALSE; 529 530 #ifndef ACPI_DEBUG 531 /* 532 * Disable Debug Object output. 533 */ 534 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 535 #endif 536 537 /* Override OS interfaces if the user requested. */ 538 acpi_reset_interfaces(dev); 539 540 /* Load ACPI name space. */ 541 status = AcpiLoadTables(); 542 if (ACPI_FAILURE(status)) { 543 device_printf(dev, "Could not load Namespace: %s\n", 544 AcpiFormatException(status)); 545 goto out; 546 } 547 548 /* Handle MCFG table if present. */ 549 acpi_enable_pcie(); 550 551 /* 552 * Note that some systems (specifically, those with namespace evaluation 553 * issues that require the avoidance of parts of the namespace) must 554 * avoid running _INI and _STA on everything, as well as dodging the final 555 * object init pass. 556 * 557 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 558 * 559 * XXX We should arrange for the object init pass after we have attached 560 * all our child devices, but on many systems it works here. 561 */ 562 flags = ACPI_FULL_INITIALIZATION; 563 if (ktestenv("debug.acpi.avoid")) 564 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 565 566 /* Bring the hardware and basic handlers online. */ 567 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 568 device_printf(dev, "Could not enable ACPI: %s\n", 569 AcpiFormatException(status)); 570 goto out; 571 } 572 573 /* 574 * Fix up the interrupt timer after enabling ACPI, so that the 575 * interrupt cputimer that choked by ACPI power management could 576 * be resurrected before probing various devices. 577 */ 578 DELAY(5000); 579 cputimer_intr_pmfixup(); 580 581 /* 582 * Call the ECDT probe function to provide EC functionality before 583 * the namespace has been evaluated. 584 * 585 * XXX This happens before the sysresource devices have been probed and 586 * attached so its resources come from nexus0. In practice, this isn't 587 * a problem but should be addressed eventually. 588 */ 589 acpi_ec_ecdt_probe(dev); 590 591 /* Bring device objects and regions online. */ 592 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 593 device_printf(dev, "Could not initialize ACPI objects: %s\n", 594 AcpiFormatException(status)); 595 goto out; 596 } 597 598 /* 599 * Setup our sysctl tree. 600 * 601 * XXX: This doesn't check to make sure that none of these fail. 602 */ 603 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 604 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 605 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 606 device_get_name(dev), CTLFLAG_RD, 0, ""); 607 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 608 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 609 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 610 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 611 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 612 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 613 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 614 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 615 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 616 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 617 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 618 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 619 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 620 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 621 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 622 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 623 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 624 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 625 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 626 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 627 "sleep delay"); 628 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 629 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 630 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 631 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 632 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 633 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 634 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 635 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 636 OID_AUTO, "handle_reboot", CTLFLAG_RW, 637 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 638 639 /* 640 * Default to 1 second before sleeping to give some machines time to 641 * stabilize. 642 */ 643 sc->acpi_sleep_delay = 1; 644 if (bootverbose) 645 sc->acpi_verbose = 1; 646 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 647 if (strcmp(env, "0") != 0) 648 sc->acpi_verbose = 1; 649 kfreeenv(env); 650 } 651 652 /* Only enable reboot by default if the FADT says it is available. */ 653 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 654 sc->acpi_handle_reboot = 1; 655 656 /* Only enable S4BIOS by default if the FACS says it is available. */ 657 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 658 sc->acpi_s4bios = 1; 659 660 /* 661 * Dispatch the default sleep state to devices. The lid switch is set 662 * to NONE by default to avoid surprising users. 663 */ 664 sc->acpi_power_button_sx = ACPI_STATE_S5; 665 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 666 sc->acpi_standby_sx = ACPI_STATE_S1; 667 sc->acpi_suspend_sx = ACPI_STATE_S3; 668 669 /* Pick the first valid sleep state for the sleep button default. */ 670 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 671 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 672 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 673 sc->acpi_sleep_button_sx = state; 674 break; 675 } 676 677 acpi_enable_fixed_events(sc); 678 679 /* 680 * Scan the namespace and attach/initialise children. 681 */ 682 683 /* Register our shutdown handler. */ 684 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 685 SHUTDOWN_PRI_LAST); 686 687 /* 688 * Register our acpi event handlers. 689 * XXX should be configurable eg. via userland policy manager. 690 */ 691 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 692 sc, ACPI_EVENT_PRI_LAST); 693 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 694 sc, ACPI_EVENT_PRI_LAST); 695 696 /* Flag our initial states. */ 697 sc->acpi_enabled = 1; 698 sc->acpi_sstate = ACPI_STATE_S0; 699 sc->acpi_sleep_disabled = 0; 700 /* Create the control device */ 701 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, "acpi"); 702 sc->acpi_dev_t->si_drv1 = sc; 703 704 if ((error = acpi_machdep_init(dev))) 705 goto out; 706 707 /* Register ACPI again to pass the correct argument of pm_func. */ 708 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 709 710 if (!acpi_disabled("bus")) 711 acpi_probe_children(dev); 712 713 /* Update all GPEs and enable runtime GPEs. */ 714 status = AcpiUpdateAllGpes(); 715 if (ACPI_FAILURE(status)) { 716 device_printf(dev, "Could not update all GPEs: %s\n", 717 AcpiFormatException(status)); 718 } 719 720 /* Allow sleep request after a while. */ 721 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 722 723 error = 0; 724 725 out: 726 ACPI_UNLOCK(acpi); 727 out2: 728 cputimer_intr_pmfixup(); 729 acpi_task_thread_schedule(); 730 731 return_VALUE (error); 732 } 733 734 static int 735 acpi_suspend(device_t dev) 736 { 737 device_t child, *devlist; 738 int error, i, numdevs, pstate; 739 740 /* First give child devices a chance to suspend. */ 741 error = bus_generic_suspend(dev); 742 if (error) 743 return (error); 744 745 /* 746 * Now, set them into the appropriate power state, usually D3. If the 747 * device has an _SxD method for the next sleep state, use that power 748 * state instead. 749 */ 750 device_get_children(dev, &devlist, &numdevs); 751 for (i = 0; i < numdevs; i++) { 752 /* If the device is not attached, we've powered it down elsewhere. */ 753 child = devlist[i]; 754 if (!device_is_attached(child)) 755 continue; 756 757 /* 758 * Default to D3 for all sleep states. The _SxD method is optional 759 * so set the powerstate even if it's absent. 760 */ 761 pstate = PCI_POWERSTATE_D3; 762 error = acpi_device_pwr_for_sleep(device_get_parent(child), 763 child, &pstate); 764 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 765 pci_set_powerstate(child, pstate); 766 } 767 kfree(devlist, M_TEMP); 768 error = 0; 769 770 return (error); 771 } 772 773 static int 774 acpi_resume(device_t dev) 775 { 776 ACPI_HANDLE handle; 777 int i, numdevs; 778 device_t child, *devlist; 779 780 /* 781 * Put all devices in D0 before resuming them. Call _S0D on each one 782 * since some systems expect this. 783 */ 784 device_get_children(dev, &devlist, &numdevs); 785 for (i = 0; i < numdevs; i++) { 786 child = devlist[i]; 787 handle = acpi_get_handle(child); 788 if (handle) 789 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 790 if (device_is_attached(child) && acpi_do_powerstate) 791 pci_set_powerstate(child, PCI_POWERSTATE_D0); 792 } 793 kfree(devlist, M_TEMP); 794 795 return (bus_generic_resume(dev)); 796 } 797 798 static int 799 acpi_shutdown(device_t dev) 800 { 801 /* Allow children to shutdown first. */ 802 bus_generic_shutdown(dev); 803 804 /* 805 * Enable any GPEs that are able to power-on the system (i.e., RTC). 806 * Also, disable any that are not valid for this state (most). 807 */ 808 acpi_wake_prep_walk(ACPI_STATE_S5); 809 810 return (0); 811 } 812 813 /* 814 * Handle a new device being added 815 */ 816 static device_t 817 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 818 { 819 struct acpi_device *ad; 820 device_t child; 821 822 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 823 return (NULL); 824 825 resource_list_init(&ad->ad_rl); 826 child = device_add_child_ordered(parent, order, name, unit); 827 if (child != NULL) 828 device_set_ivars(child, ad); 829 else 830 kfree(ad, M_ACPIDEV); 831 return (child); 832 } 833 834 static int 835 acpi_print_child(device_t bus, device_t child) 836 { 837 struct acpi_device *adev = device_get_ivars(child); 838 struct resource_list *rl = &adev->ad_rl; 839 int retval = 0; 840 841 retval += bus_print_child_header(bus, child); 842 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 843 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 844 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 845 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 846 if (device_get_flags(child)) 847 retval += kprintf(" flags %#x", device_get_flags(child)); 848 retval += bus_print_child_footer(bus, child); 849 850 return (retval); 851 } 852 853 /* 854 * If this device is an ACPI child but no one claimed it, attempt 855 * to power it off. We'll power it back up when a driver is added. 856 * 857 * XXX Disabled for now since many necessary devices (like fdc and 858 * ATA) don't claim the devices we created for them but still expect 859 * them to be powered up. 860 */ 861 static void 862 acpi_probe_nomatch(device_t bus, device_t child) 863 { 864 865 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 866 } 867 868 /* 869 * If a new driver has a chance to probe a child, first power it up. 870 * 871 * XXX Disabled for now (see acpi_probe_nomatch for details). 872 */ 873 static void 874 acpi_driver_added(device_t dev, driver_t *driver) 875 { 876 device_t child, *devlist; 877 int i, numdevs; 878 879 DEVICE_IDENTIFY(driver, dev); 880 device_get_children(dev, &devlist, &numdevs); 881 for (i = 0; i < numdevs; i++) { 882 child = devlist[i]; 883 if (device_get_state(child) == DS_NOTPRESENT) { 884 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 885 if (device_probe_and_attach(child) != 0) { 886 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 887 } 888 } 889 } 890 kfree(devlist, M_TEMP); 891 } 892 893 /* Location hint for devctl(8) */ 894 static int 895 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 896 size_t buflen) 897 { 898 struct acpi_device *dinfo = device_get_ivars(child); 899 900 if (dinfo->ad_handle) 901 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 902 else 903 ksnprintf(buf, buflen, "unknown"); 904 return (0); 905 } 906 907 /* PnP information for devctl(8) */ 908 static int 909 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 910 size_t buflen) 911 { 912 ACPI_DEVICE_INFO *adinfo; 913 struct acpi_device *dinfo = device_get_ivars(child); 914 915 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 916 ksnprintf(buf, buflen, "unknown"); 917 } else { 918 ksnprintf(buf, buflen, "_HID=%s _UID=%s", 919 (adinfo->Valid & ACPI_VALID_HID) ? 920 adinfo->HardwareId.String : "none", 921 (adinfo->Valid & ACPI_VALID_UID) ? 922 adinfo->UniqueId.String : "0"); 923 if (adinfo) 924 AcpiOsFree(adinfo); 925 } 926 return (0); 927 } 928 929 /* 930 * Handle per-device ivars 931 */ 932 static int 933 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 934 { 935 struct acpi_device *ad; 936 937 if ((ad = device_get_ivars(child)) == NULL) { 938 device_printf(child, "device has no ivars\n"); 939 return (ENOENT); 940 } 941 942 /* ACPI and ISA compatibility ivars */ 943 switch(index) { 944 case ACPI_IVAR_HANDLE: 945 *(ACPI_HANDLE *)result = ad->ad_handle; 946 break; 947 case ACPI_IVAR_MAGIC: 948 *result = ad->ad_magic; 949 break; 950 case ACPI_IVAR_PRIVATE: 951 *(void **)result = ad->ad_private; 952 break; 953 case ACPI_IVAR_FLAGS: 954 *(int *)result = ad->ad_flags; 955 break; 956 case ACPI_IVAR_RECHECK: 957 *(int *)result = ad->ad_recheck; 958 break; 959 case ISA_IVAR_VENDORID: 960 case ISA_IVAR_SERIAL: 961 case ISA_IVAR_COMPATID: 962 *(int *)result = -1; 963 break; 964 case ISA_IVAR_LOGICALID: 965 *(int *)result = acpi_isa_get_logicalid(child); 966 break; 967 default: 968 return (ENOENT); 969 } 970 971 return (0); 972 } 973 974 static int 975 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 976 { 977 struct acpi_device *ad; 978 979 if ((ad = device_get_ivars(child)) == NULL) { 980 device_printf(child, "device has no ivars\n"); 981 return (ENOENT); 982 } 983 984 switch(index) { 985 case ACPI_IVAR_HANDLE: 986 ad->ad_handle = (ACPI_HANDLE)value; 987 break; 988 case ACPI_IVAR_MAGIC: 989 ad->ad_magic = value; 990 break; 991 case ACPI_IVAR_PRIVATE: 992 ad->ad_private = (void *)value; 993 break; 994 case ACPI_IVAR_FLAGS: 995 ad->ad_flags = (int)value; 996 break; 997 case ACPI_IVAR_RECHECK: 998 ad->ad_recheck = (int)value; 999 break; 1000 default: 1001 panic("bad ivar write request (%d)", index); 1002 return (ENOENT); 1003 } 1004 1005 return (0); 1006 } 1007 1008 /* 1009 * Handle child resource allocation/removal 1010 */ 1011 static struct resource_list * 1012 acpi_get_rlist(device_t dev, device_t child) 1013 { 1014 struct acpi_device *ad; 1015 1016 ad = device_get_ivars(child); 1017 return (&ad->ad_rl); 1018 } 1019 1020 /* 1021 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1022 * duplicates, we merge any in the sysresource attach routine. 1023 */ 1024 static int 1025 acpi_sysres_alloc(device_t dev) 1026 { 1027 struct resource *res; 1028 struct resource_list *rl; 1029 struct resource_list_entry *rle; 1030 struct rman *rm; 1031 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1032 device_t *children; 1033 int child_count, i; 1034 /* 1035 * Probe/attach any sysresource devices. This would be unnecessary if we 1036 * had multi-pass probe/attach. 1037 */ 1038 if (device_get_children(dev, &children, &child_count) != 0) 1039 return (ENXIO); 1040 for (i = 0; i < child_count; i++) { 1041 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1042 device_probe_and_attach(children[i]); 1043 } 1044 kfree(children, M_TEMP); 1045 1046 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1047 if(!rl) 1048 return 0; 1049 SLIST_FOREACH(rle, rl, link) { 1050 if (rle->res != NULL) { 1051 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1052 continue; 1053 } 1054 1055 /* Only memory and IO resources are valid here. */ 1056 switch (rle->type) { 1057 case SYS_RES_IOPORT: 1058 rm = &acpi_rman_io; 1059 break; 1060 case SYS_RES_MEMORY: 1061 rm = &acpi_rman_mem; 1062 break; 1063 default: 1064 continue; 1065 } 1066 1067 /* Pre-allocate resource and add to our rman pool. */ 1068 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1069 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1070 0, -1); 1071 if (res != NULL) { 1072 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1073 rle->res = res; 1074 } else 1075 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1076 rle->start, rle->count, rle->type); 1077 } 1078 return (0); 1079 } 1080 1081 static struct resource * 1082 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1083 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1084 { 1085 ACPI_RESOURCE ares; 1086 struct acpi_device *ad = device_get_ivars(child); 1087 struct resource_list *rl = &ad->ad_rl; 1088 struct resource_list_entry *rle; 1089 struct resource *res; 1090 struct rman *rm; 1091 1092 res = NULL; 1093 1094 /* We only handle memory and IO resources through rman. */ 1095 switch (type) { 1096 case SYS_RES_IOPORT: 1097 rm = &acpi_rman_io; 1098 break; 1099 case SYS_RES_MEMORY: 1100 rm = &acpi_rman_mem; 1101 break; 1102 default: 1103 rm = NULL; 1104 } 1105 1106 ACPI_SERIAL_BEGIN(acpi); 1107 1108 /* 1109 * If this is an allocation of the "default" range for a given RID, and 1110 * we know what the resources for this device are (i.e., they're on the 1111 * child's resource list), use those start/end values. 1112 */ 1113 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1114 rle = resource_list_find(rl, type, *rid); 1115 if (rle == NULL) 1116 goto out; 1117 start = rle->start; 1118 end = rle->end; 1119 count = rle->count; 1120 cpuid = rle->cpuid; 1121 } 1122 1123 /* 1124 * If this is an allocation of a specific range, see if we can satisfy 1125 * the request from our system resource regions. If we can't, pass the 1126 * request up to the parent. 1127 */ 1128 if (start + count - 1 == end && rm != NULL) 1129 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1130 child); 1131 if (res == NULL) { 1132 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1133 start, end, count, flags, cpuid); 1134 } else { 1135 rman_set_rid(res, *rid); 1136 1137 /* If requested, activate the resource using the parent's method. */ 1138 if (flags & RF_ACTIVE) 1139 if (bus_activate_resource(child, type, *rid, res) != 0) { 1140 rman_release_resource(res); 1141 res = NULL; 1142 goto out; 1143 } 1144 } 1145 1146 if (res != NULL && device_get_parent(child) == bus) 1147 switch (type) { 1148 case SYS_RES_IRQ: 1149 /* 1150 * Since bus_config_intr() takes immediate effect, we cannot 1151 * configure the interrupt associated with a device when we 1152 * parse the resources but have to defer it until a driver 1153 * actually allocates the interrupt via bus_alloc_resource(). 1154 * 1155 * NB: Lookup failure is fine, since the device may add its 1156 * own interrupt resources, e.g. MSI or MSI-X. 1157 */ 1158 if (ACPI_SUCCESS( 1159 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1160 acpi_config_intr(child, &ares); 1161 } else { 1162 kprintf("irq resource not found\n"); 1163 } 1164 break; 1165 } 1166 1167 out: 1168 ACPI_SERIAL_END(acpi); 1169 return (res); 1170 } 1171 1172 static int 1173 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1174 struct resource *r) 1175 { 1176 struct rman *rm; 1177 int ret; 1178 1179 /* We only handle memory and IO resources through rman. */ 1180 switch (type) { 1181 case SYS_RES_IOPORT: 1182 rm = &acpi_rman_io; 1183 break; 1184 case SYS_RES_MEMORY: 1185 rm = &acpi_rman_mem; 1186 break; 1187 default: 1188 rm = NULL; 1189 } 1190 1191 ACPI_SERIAL_BEGIN(acpi); 1192 1193 /* 1194 * If this resource belongs to one of our internal managers, 1195 * deactivate it and release it to the local pool. If it doesn't, 1196 * pass this request up to the parent. 1197 */ 1198 if (rm != NULL && rman_is_region_manager(r, rm)) { 1199 if (rman_get_flags(r) & RF_ACTIVE) { 1200 ret = bus_deactivate_resource(child, type, rid, r); 1201 if (ret != 0) 1202 goto out; 1203 } 1204 ret = rman_release_resource(r); 1205 } else 1206 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1207 1208 out: 1209 ACPI_SERIAL_END(acpi); 1210 return (ret); 1211 } 1212 1213 static void 1214 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1215 { 1216 struct resource_list *rl; 1217 1218 rl = acpi_get_rlist(bus, child); 1219 resource_list_delete(rl, type, rid); 1220 } 1221 1222 /* Allocate an IO port or memory resource, given its GAS. */ 1223 int 1224 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1225 struct resource **res, u_int flags) 1226 { 1227 int error, res_type; 1228 1229 error = ENOMEM; 1230 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1231 return (EINVAL); 1232 1233 /* We only support memory and IO spaces. */ 1234 switch (gas->SpaceId) { 1235 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1236 res_type = SYS_RES_MEMORY; 1237 break; 1238 case ACPI_ADR_SPACE_SYSTEM_IO: 1239 res_type = SYS_RES_IOPORT; 1240 break; 1241 default: 1242 return (EOPNOTSUPP); 1243 } 1244 1245 /* 1246 * If the register width is less than 8, assume the BIOS author means 1247 * it is a bit field and just allocate a byte. 1248 */ 1249 if (gas->BitWidth && gas->BitWidth < 8) 1250 gas->BitWidth = 8; 1251 1252 /* Validate the address after we're sure we support the space. */ 1253 if (gas->Address == 0 || gas->BitWidth == 0) 1254 return (EINVAL); 1255 1256 bus_set_resource(dev, res_type, *rid, gas->Address, 1257 gas->BitWidth / 8, -1); 1258 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1259 if (*res != NULL) { 1260 *type = res_type; 1261 error = 0; 1262 } else 1263 bus_delete_resource(dev, res_type, *rid); 1264 1265 return (error); 1266 } 1267 1268 ACPI_STATUS 1269 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1270 int revision, uint32_t *buf, int count) 1271 { 1272 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1273 ACPI_OBJECT_LIST arglist; 1274 ACPI_OBJECT arg[4]; 1275 ACPI_OBJECT *retobj; 1276 ACPI_STATUS status; 1277 struct uuid uuid; 1278 uint32_t error; 1279 uint8_t oscuuid[ACPI_UUID_LENGTH]; 1280 int i; 1281 1282 if (parse_uuid(uuidstr, &uuid) != 0) 1283 return (AE_ERROR); 1284 le_uuid_enc(oscuuid, &uuid); 1285 1286 arglist.Pointer = arg; 1287 arglist.Count = 4; 1288 arg[0].Type = ACPI_TYPE_BUFFER; 1289 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 1290 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1291 arg[1].Type = ACPI_TYPE_INTEGER; 1292 arg[1].Integer.Value = revision; /* revision */ 1293 arg[2].Type = ACPI_TYPE_INTEGER; 1294 arg[2].Integer.Value = count; /* # of cap integers */ 1295 arg[3].Type = ACPI_TYPE_BUFFER; 1296 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1297 arg[3].Buffer.Pointer = (uint8_t *)buf; 1298 1299 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1300 if (ACPI_FAILURE(status)) 1301 goto done; 1302 retobj = retbuf.Pointer; 1303 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSC_ERRMASK; 1304 if (error == 0) 1305 goto done; 1306 status = AE_ERROR; 1307 if (error & ACPI_OSCERR_FAILURE) 1308 device_printf(dev, "_OSC unable to process request\n"); 1309 if (error & ACPI_OSCERR_BADUUID) 1310 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1311 if (error & ACPI_OSCERR_BADREV) 1312 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1313 if (error & ACPI_OSCERR_CAPSMASKED) { 1314 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1315 for (i = 1; i < count; i++) { 1316 device_printf(dev, 1317 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1318 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1319 } 1320 status = AE_SUPPORT; 1321 } else { 1322 status = AE_OK; 1323 } 1324 } 1325 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) { 1326 for (i = 0; i < count; i++) 1327 buf[i] = ((uint32_t *)retobj->Buffer.Pointer)[i]; 1328 } 1329 1330 done: 1331 if (retbuf.Pointer != NULL) 1332 AcpiOsFree(retbuf.Pointer); 1333 return (status); 1334 } 1335 1336 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1337 static uint32_t 1338 acpi_isa_get_logicalid(device_t dev) 1339 { 1340 ACPI_DEVICE_INFO *devinfo; 1341 ACPI_HANDLE h; 1342 uint32_t pnpid; 1343 1344 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1345 1346 devinfo = NULL; 1347 pnpid = 0; 1348 1349 /* Fetch and validate the HID. */ 1350 if ((h = acpi_get_handle(dev)) == NULL || 1351 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1352 goto out; 1353 1354 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1355 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1356 1357 out: 1358 if (devinfo) 1359 AcpiOsFree(devinfo); 1360 return_VALUE (pnpid); 1361 } 1362 1363 static int 1364 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1365 { 1366 ACPI_DEVICE_INFO *devinfo; 1367 ACPI_HANDLE h; 1368 uint32_t *pnpid; 1369 int valid, i; 1370 1371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1372 1373 devinfo = NULL; 1374 pnpid = cids; 1375 valid = 0; 1376 1377 /* Fetch and validate the CID */ 1378 if ((h = acpi_get_handle(dev)) == NULL || 1379 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1380 (devinfo->Valid & ACPI_VALID_CID) == 0) 1381 goto out; 1382 1383 if (devinfo->CompatibleIdList.Count < count) 1384 count = devinfo->CompatibleIdList.Count; 1385 for (i = 0; i < count; i++) { 1386 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1387 continue; 1388 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1389 valid++; 1390 } 1391 1392 out: 1393 if (devinfo) 1394 AcpiOsFree(devinfo); 1395 return_VALUE (valid); 1396 } 1397 1398 static char * 1399 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1400 { 1401 ACPI_HANDLE h; 1402 int i; 1403 1404 h = acpi_get_handle(dev); 1405 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1406 return (NULL); 1407 1408 /* Try to match one of the array of IDs with a HID or CID. */ 1409 for (i = 0; ids[i] != NULL; i++) { 1410 if (acpi_MatchHid(h, ids[i])) 1411 return (ids[i]); 1412 } 1413 return (NULL); 1414 } 1415 1416 static ACPI_STATUS 1417 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1418 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1419 { 1420 ACPI_HANDLE h; 1421 1422 if (dev == NULL) 1423 h = ACPI_ROOT_OBJECT; 1424 else if ((h = acpi_get_handle(dev)) == NULL) 1425 return (AE_BAD_PARAMETER); 1426 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1427 } 1428 1429 static int 1430 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1431 { 1432 struct acpi_softc *sc; 1433 ACPI_HANDLE handle; 1434 ACPI_STATUS status; 1435 char sxd[8]; 1436 int error; 1437 1438 sc = device_get_softc(bus); 1439 handle = acpi_get_handle(dev); 1440 1441 /* 1442 * XXX If we find these devices, don't try to power them down. 1443 * The serial and IRDA ports on my T23 hang the system when 1444 * set to D3 and it appears that such legacy devices may 1445 * need special handling in their drivers. 1446 */ 1447 if (handle == NULL || 1448 acpi_MatchHid(handle, "PNP0500") || 1449 acpi_MatchHid(handle, "PNP0501") || 1450 acpi_MatchHid(handle, "PNP0502") || 1451 acpi_MatchHid(handle, "PNP0510") || 1452 acpi_MatchHid(handle, "PNP0511")) 1453 return (ENXIO); 1454 1455 /* 1456 * Override next state with the value from _SxD, if present. If no 1457 * dstate argument was provided, don't fetch the return value. 1458 */ 1459 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1460 if (dstate) 1461 status = acpi_GetInteger(handle, sxd, dstate); 1462 else 1463 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1464 1465 switch (status) { 1466 case AE_OK: 1467 error = 0; 1468 break; 1469 case AE_NOT_FOUND: 1470 error = ESRCH; 1471 break; 1472 default: 1473 error = ENXIO; 1474 break; 1475 } 1476 1477 return (error); 1478 } 1479 1480 /* Callback arg for our implementation of walking the namespace. */ 1481 struct acpi_device_scan_ctx { 1482 acpi_scan_cb_t user_fn; 1483 void *arg; 1484 ACPI_HANDLE parent; 1485 }; 1486 1487 static ACPI_STATUS 1488 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1489 { 1490 struct acpi_device_scan_ctx *ctx; 1491 device_t dev, old_dev; 1492 ACPI_STATUS status; 1493 ACPI_OBJECT_TYPE type; 1494 1495 /* 1496 * Skip this device if we think we'll have trouble with it or it is 1497 * the parent where the scan began. 1498 */ 1499 ctx = (struct acpi_device_scan_ctx *)arg; 1500 if (acpi_avoid(h) || h == ctx->parent) 1501 return (AE_OK); 1502 1503 /* If this is not a valid device type (e.g., a method), skip it. */ 1504 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1505 return (AE_OK); 1506 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1507 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1508 return (AE_OK); 1509 1510 /* 1511 * Call the user function with the current device. If it is unchanged 1512 * afterwards, return. Otherwise, we update the handle to the new dev. 1513 */ 1514 old_dev = acpi_get_device(h); 1515 dev = old_dev; 1516 status = ctx->user_fn(h, &dev, level, ctx->arg); 1517 if (ACPI_FAILURE(status) || old_dev == dev) 1518 return (status); 1519 1520 /* Remove the old child and its connection to the handle. */ 1521 if (old_dev != NULL) { 1522 device_delete_child(device_get_parent(old_dev), old_dev); 1523 AcpiDetachData(h, acpi_fake_objhandler); 1524 } 1525 1526 /* Recreate the handle association if the user created a device. */ 1527 if (dev != NULL) 1528 AcpiAttachData(h, acpi_fake_objhandler, dev); 1529 1530 return (AE_OK); 1531 } 1532 1533 static ACPI_STATUS 1534 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1535 acpi_scan_cb_t user_fn, void *arg) 1536 { 1537 ACPI_HANDLE h; 1538 struct acpi_device_scan_ctx ctx; 1539 1540 if (acpi_disabled("children")) 1541 return (AE_OK); 1542 1543 if (dev == NULL) 1544 h = ACPI_ROOT_OBJECT; 1545 else if ((h = acpi_get_handle(dev)) == NULL) 1546 return (AE_BAD_PARAMETER); 1547 ctx.user_fn = user_fn; 1548 ctx.arg = arg; 1549 ctx.parent = h; 1550 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1551 acpi_device_scan_cb, NULL, &ctx, NULL)); 1552 } 1553 1554 /* 1555 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1556 * device power states since it's close enough to ACPI. 1557 */ 1558 static int 1559 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1560 { 1561 ACPI_HANDLE h; 1562 ACPI_STATUS status; 1563 int error; 1564 1565 error = 0; 1566 h = acpi_get_handle(child); 1567 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1568 return (EINVAL); 1569 if (h == NULL) 1570 return (0); 1571 1572 /* Ignore errors if the power methods aren't present. */ 1573 status = acpi_pwr_switch_consumer(h, state); 1574 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1575 && status != AE_BAD_PARAMETER) 1576 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1577 state, acpi_name(h), AcpiFormatException(status)); 1578 1579 return (error); 1580 } 1581 1582 static int 1583 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1584 { 1585 int result, cid_count, i; 1586 uint32_t lid, cids[8]; 1587 1588 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1589 1590 /* 1591 * ISA-style drivers attached to ACPI may persist and 1592 * probe manually if we return ENOENT. We never want 1593 * that to happen, so don't ever return it. 1594 */ 1595 result = ENXIO; 1596 1597 /* Scan the supplied IDs for a match */ 1598 lid = acpi_isa_get_logicalid(child); 1599 cid_count = acpi_isa_get_compatid(child, cids, 8); 1600 while (ids && ids->ip_id) { 1601 if (lid == ids->ip_id) { 1602 result = 0; 1603 goto out; 1604 } 1605 for (i = 0; i < cid_count; i++) { 1606 if (cids[i] == ids->ip_id) { 1607 result = 0; 1608 goto out; 1609 } 1610 } 1611 ids++; 1612 } 1613 1614 out: 1615 if (result == 0 && ids->ip_desc) 1616 device_set_desc(child, ids->ip_desc); 1617 1618 return_VALUE (result); 1619 } 1620 1621 /* 1622 * Look for a MCFG table. If it is present, use the settings for 1623 * domain (segment) 0 to setup PCI config space access via the memory 1624 * map. 1625 */ 1626 static void 1627 acpi_enable_pcie(void) 1628 { 1629 ACPI_TABLE_HEADER *hdr; 1630 ACPI_MCFG_ALLOCATION *alloc, *end; 1631 ACPI_STATUS status; 1632 1633 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1634 if (ACPI_FAILURE(status)) 1635 return; 1636 1637 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1638 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1639 while (alloc < end) { 1640 if (alloc->PciSegment == 0) { 1641 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1642 alloc->EndBusNumber); 1643 return; 1644 } 1645 alloc++; 1646 } 1647 } 1648 1649 /* 1650 * Scan all of the ACPI namespace and attach child devices. 1651 * 1652 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1653 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1654 * However, in violation of the spec, some systems place their PCI link 1655 * devices in \, so we have to walk the whole namespace. We check the 1656 * type of namespace nodes, so this should be ok. 1657 */ 1658 static void 1659 acpi_probe_children(device_t bus) 1660 { 1661 device_t *children; 1662 int cnt; 1663 1664 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1665 1666 /* 1667 * Scan the namespace and insert placeholders for all the devices that 1668 * we find. We also probe/attach any early devices. 1669 * 1670 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1671 * we want to create nodes for all devices, not just those that are 1672 * currently present. (This assumes that we don't want to create/remove 1673 * devices as they appear, which might be smarter.) 1674 */ 1675 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1676 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1677 acpi_probe_child, NULL, bus, NULL); 1678 /* This gets us all the children that we added from the ACPI namespace. */ 1679 device_get_children(bus, &children, &cnt); 1680 1681 /* Pre-allocate resources for our rman from any sysresource devices. */ 1682 acpi_sysres_alloc(bus); 1683 /* Create any static children by calling device identify methods. */ 1684 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1685 bus_generic_probe(bus); 1686 1687 /* Probe/attach all children, created staticly and from the namespace. */ 1688 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1689 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+2); 1690 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1691 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+1); 1692 /* Re-check device presence for previously disabled devices. */ 1693 acpi_reprobe_children(bus, children, cnt); 1694 kfree(children, M_TEMP); 1695 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "third bus_generic_attach\n")); 1696 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1697 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fourth bus_generic_attach\n")); 1698 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1699 1700 /* 1701 * Some of these children may have attached others as part of their attach 1702 * process (eg. the root PCI bus driver), so rescan. 1703 */ 1704 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fifth bus_generic_attach\n")); 1705 bus_generic_attach(bus); 1706 1707 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "sixth bus_generic_attach\n")); 1708 bus_generic_attach(bus); 1709 1710 /* Attach wake sysctls. */ 1711 acpi_wake_sysctl_walk(bus); 1712 1713 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1714 return_VOID; 1715 } 1716 1717 /* 1718 * Determine the probe order for a given device. 1719 */ 1720 static void 1721 acpi_probe_order(ACPI_HANDLE handle, int *order) 1722 { 1723 ACPI_OBJECT_TYPE type; 1724 1725 /* 1726 * 1. I/O port and memory system resource holders 1727 * 2. Embedded controllers (to handle early accesses) 1728 * 3. PCI Link Devices 1729 * 100000. CPUs 1730 */ 1731 AcpiGetType(handle, &type); 1732 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1733 *order = 1; 1734 else if (acpi_MatchHid(handle, "PNP0C09")) 1735 *order = 2; 1736 else if (acpi_MatchHid(handle, "PNP0C0F")) 1737 *order = 3; 1738 else if (type == ACPI_TYPE_PROCESSOR) 1739 *order = 100000; 1740 } 1741 1742 /* 1743 * Flag a device as disabled, because it isn't present according to the 1744 * _STA method. We set the recheck instance-variable, to make sure that we 1745 * recheck the device presence at a later point. 1746 */ 1747 static void 1748 acpi_disable_not_present(device_t child) 1749 { 1750 device_disable(child); 1751 acpi_set_recheck(child, 1); 1752 } 1753 1754 /* 1755 * This rechecks the device presence for all the devices which were disabled 1756 * using acpi_disable_not_present(). 1757 */ 1758 static void 1759 acpi_reprobe_children(device_t bus, device_t *children, int cnt) 1760 { 1761 int i; 1762 1763 for (i = 0; i < cnt; i++) { 1764 device_t dev = children[i]; 1765 1766 if (device_is_enabled(dev)) 1767 continue; 1768 1769 if (acpi_get_recheck(dev)) { 1770 if (acpi_DeviceIsPresent(dev)) { 1771 acpi_set_recheck(dev, 0); 1772 device_enable(dev); 1773 /* 1774 * Currently we parse the resources for every 1775 * device at the first time, when we see 1776 * that it is present. 1777 */ 1778 acpi_parse_resources(dev, acpi_get_handle(dev), 1779 &acpi_res_parse_set, NULL); 1780 } 1781 } 1782 } 1783 } 1784 1785 /* 1786 * Evaluate a child device and determine whether we might attach a device to 1787 * it. 1788 */ 1789 static ACPI_STATUS 1790 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1791 { 1792 struct acpi_prw_data prw; 1793 ACPI_OBJECT_TYPE type; 1794 ACPI_HANDLE h; 1795 device_t bus, child; 1796 int order; 1797 char *handle_str; 1798 1799 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1800 1801 if (acpi_disabled("children")) 1802 return_ACPI_STATUS (AE_OK); 1803 1804 /* Skip this device if we think we'll have trouble with it. */ 1805 if (acpi_avoid(handle)) 1806 return_ACPI_STATUS (AE_OK); 1807 1808 bus = (device_t)context; 1809 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1810 handle_str = acpi_name(handle); 1811 switch (type) { 1812 case ACPI_TYPE_DEVICE: 1813 /* 1814 * Since we scan from \, be sure to skip system scope objects. 1815 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1816 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1817 * during the intialization and \_TZ_ is to support Notify() on it. 1818 */ 1819 if (strcmp(handle_str, "\\_SB_") == 0 || 1820 strcmp(handle_str, "\\_TZ_") == 0) 1821 break; 1822 1823 if (acpi_parse_prw(handle, &prw) == 0) 1824 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1825 1826 /* FALLTHROUGH */ 1827 case ACPI_TYPE_PROCESSOR: 1828 case ACPI_TYPE_THERMAL: 1829 case ACPI_TYPE_POWER: 1830 /* 1831 * Create a placeholder device for this node. Sort the 1832 * placeholder so that the probe/attach passes will run 1833 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1834 * are reserved for special objects (i.e., system 1835 * resources). CPU devices have a very high order to 1836 * ensure they are probed after other devices. 1837 */ 1838 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1839 order = level * 10 + 100; 1840 acpi_probe_order(handle, &order); 1841 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1842 if (child == NULL) 1843 break; 1844 1845 /* Associate the handle with the device_t and vice versa. */ 1846 acpi_set_handle(child, handle); 1847 AcpiAttachData(handle, acpi_fake_objhandler, child); 1848 1849 /* 1850 * Check that the device is present. If it's not present, 1851 * leave it disabled (so that we have a device_t attached to 1852 * the handle, but we don't probe it). 1853 * 1854 * XXX PCI link devices sometimes report "present" but not 1855 * "functional" (i.e. if disabled). Go ahead and probe them 1856 * anyway since we may enable them later. 1857 */ 1858 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1859 /* Never disable PCI link devices. */ 1860 if (acpi_MatchHid(handle, "PNP0C0F")) 1861 break; 1862 /* 1863 * Docking stations should remain enabled since the system 1864 * may be undocked at boot. 1865 */ 1866 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1867 break; 1868 1869 acpi_disable_not_present(child); 1870 break; 1871 } 1872 1873 /* 1874 * Get the device's resource settings and attach them. 1875 * Note that if the device has _PRS but no _CRS, we need 1876 * to decide when it's appropriate to try to configure the 1877 * device. Ignore the return value here; it's OK for the 1878 * device not to have any resources. 1879 */ 1880 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1881 break; 1882 } 1883 } 1884 1885 return_ACPI_STATUS (AE_OK); 1886 } 1887 1888 /* 1889 * AcpiAttachData() requires an object handler but never uses it. This is a 1890 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1891 */ 1892 void 1893 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1894 { 1895 } 1896 1897 static void 1898 acpi_shutdown_final(void *arg, int howto) 1899 { 1900 struct acpi_softc *sc; 1901 ACPI_STATUS status; 1902 1903 /* 1904 * XXX Shutdown code should only run on the BSP (cpuid 0). 1905 * Some chipsets do not power off the system correctly if called from 1906 * an AP. 1907 */ 1908 sc = arg; 1909 if ((howto & RB_POWEROFF) != 0) { 1910 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1911 if (ACPI_FAILURE(status)) { 1912 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1913 AcpiFormatException(status)); 1914 return; 1915 } 1916 device_printf(sc->acpi_dev, "Powering system off\n"); 1917 ACPI_DISABLE_IRQS(); 1918 status = AcpiEnterSleepState(ACPI_STATE_S5); 1919 if (ACPI_FAILURE(status)) { 1920 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1921 AcpiFormatException(status)); 1922 } else { 1923 DELAY(1000000); 1924 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1925 } 1926 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1927 /* Reboot using the reset register. */ 1928 status = AcpiReset(); 1929 if (ACPI_FAILURE(status)) { 1930 if (status != AE_NOT_EXIST) 1931 device_printf(sc->acpi_dev, "reset failed - %s\n", 1932 AcpiFormatException(status)); 1933 } else { 1934 DELAY(1000000); 1935 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1936 } 1937 } else if (sc->acpi_do_disable && panicstr == NULL) { 1938 /* 1939 * Only disable ACPI if the user requested. On some systems, writing 1940 * the disable value to SMI_CMD hangs the system. 1941 */ 1942 device_printf(sc->acpi_dev, "Shutting down\n"); 1943 AcpiTerminate(); 1944 } 1945 } 1946 1947 static void 1948 acpi_enable_fixed_events(struct acpi_softc *sc) 1949 { 1950 static int first_time = 1; 1951 1952 /* Enable and clear fixed events and install handlers. */ 1953 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1954 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1955 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1956 acpi_event_power_button_sleep, sc); 1957 if (first_time) 1958 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1959 } 1960 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1961 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1962 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1963 acpi_event_sleep_button_sleep, sc); 1964 if (first_time) 1965 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1966 } 1967 1968 first_time = 0; 1969 } 1970 1971 /* 1972 * Returns true if the device is actually present and should 1973 * be attached to. This requires the present, enabled, UI-visible 1974 * and diagnostics-passed bits to be set. 1975 */ 1976 BOOLEAN 1977 acpi_DeviceIsPresent(device_t dev) 1978 { 1979 ACPI_HANDLE h; 1980 UINT32 s; 1981 ACPI_STATUS status; 1982 1983 h = acpi_get_handle(dev); 1984 if (h == NULL) 1985 return (FALSE); 1986 status = acpi_GetInteger(h, "_STA", &s); 1987 1988 /* 1989 * If no _STA method or if it failed, then assume that 1990 * the device is present. 1991 */ 1992 if (ACPI_FAILURE(status)) 1993 return (TRUE); 1994 1995 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE); 1996 } 1997 1998 /* 1999 * Returns true if the battery is actually present and inserted. 2000 */ 2001 BOOLEAN 2002 acpi_BatteryIsPresent(device_t dev) 2003 { 2004 ACPI_HANDLE h; 2005 UINT32 s; 2006 ACPI_STATUS status; 2007 2008 h = acpi_get_handle(dev); 2009 if (h == NULL) 2010 return (FALSE); 2011 status = acpi_GetInteger(h, "_STA", &s); 2012 2013 /* 2014 * If no _STA method or if it failed, then assume that 2015 * the device is present. 2016 */ 2017 if (ACPI_FAILURE(status)) 2018 return (TRUE); 2019 2020 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE); 2021 } 2022 2023 /* 2024 * Match a HID string against a handle 2025 */ 2026 BOOLEAN 2027 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2028 { 2029 ACPI_DEVICE_INFO *devinfo; 2030 int ret, i; 2031 2032 ret = FALSE; 2033 if (hid == NULL || h == NULL || 2034 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2035 return (ret); 2036 2037 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2038 strcmp(hid, devinfo->HardwareId.String) == 0) 2039 ret = TRUE; 2040 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 2041 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2042 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2043 ret = TRUE; 2044 break; 2045 } 2046 } 2047 } 2048 2049 AcpiOsFree(devinfo); 2050 return (ret); 2051 } 2052 2053 /* 2054 * Match a UID string against a handle 2055 */ 2056 BOOLEAN 2057 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 2058 { 2059 ACPI_DEVICE_INFO *devinfo; 2060 int ret; 2061 2062 ret = FALSE; 2063 if (uid == NULL || h == NULL || 2064 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2065 return (ret); 2066 2067 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 2068 strcmp(uid, devinfo->UniqueId.String) == 0) 2069 ret = TRUE; 2070 2071 AcpiOsFree(devinfo); 2072 return (ret); 2073 } 2074 2075 /* 2076 * Return the handle of a named object within our scope, ie. that of (parent) 2077 * or one if its parents. 2078 */ 2079 ACPI_STATUS 2080 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2081 { 2082 ACPI_HANDLE r; 2083 ACPI_STATUS status; 2084 2085 /* Walk back up the tree to the root */ 2086 for (;;) { 2087 status = AcpiGetHandle(parent, path, &r); 2088 if (ACPI_SUCCESS(status)) { 2089 *result = r; 2090 return (AE_OK); 2091 } 2092 /* XXX Return error here? */ 2093 if (status != AE_NOT_FOUND) 2094 return (AE_OK); 2095 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2096 return (AE_NOT_FOUND); 2097 parent = r; 2098 } 2099 } 2100 2101 /* 2102 * Allocate a buffer with a preset data size. 2103 */ 2104 ACPI_BUFFER * 2105 acpi_AllocBuffer(int size) 2106 { 2107 ACPI_BUFFER *buf; 2108 2109 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2110 return (NULL); 2111 buf->Length = size; 2112 buf->Pointer = (void *)(buf + 1); 2113 return (buf); 2114 } 2115 2116 ACPI_STATUS 2117 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2118 { 2119 ACPI_OBJECT arg1; 2120 ACPI_OBJECT_LIST args; 2121 2122 arg1.Type = ACPI_TYPE_INTEGER; 2123 arg1.Integer.Value = number; 2124 args.Count = 1; 2125 args.Pointer = &arg1; 2126 2127 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2128 } 2129 2130 /* 2131 * Evaluate a path that should return an integer. 2132 */ 2133 ACPI_STATUS 2134 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2135 { 2136 ACPI_STATUS status; 2137 ACPI_BUFFER buf; 2138 ACPI_OBJECT param; 2139 2140 if (handle == NULL) 2141 handle = ACPI_ROOT_OBJECT; 2142 2143 /* 2144 * Assume that what we've been pointed at is an Integer object, or 2145 * a method that will return an Integer. 2146 */ 2147 buf.Pointer = ¶m; 2148 buf.Length = sizeof(param); 2149 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2150 if (ACPI_SUCCESS(status)) { 2151 if (param.Type == ACPI_TYPE_INTEGER) 2152 *number = param.Integer.Value; 2153 else 2154 status = AE_TYPE; 2155 } 2156 2157 /* 2158 * In some applications, a method that's expected to return an Integer 2159 * may instead return a Buffer (probably to simplify some internal 2160 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2161 * convert it into an Integer as best we can. 2162 * 2163 * This is a hack. 2164 */ 2165 if (status == AE_BUFFER_OVERFLOW) { 2166 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2167 status = AE_NO_MEMORY; 2168 } else { 2169 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2170 if (ACPI_SUCCESS(status)) 2171 status = acpi_ConvertBufferToInteger(&buf, number); 2172 AcpiOsFree(buf.Pointer); 2173 } 2174 } 2175 return (status); 2176 } 2177 2178 ACPI_STATUS 2179 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2180 { 2181 ACPI_OBJECT *p; 2182 UINT8 *val; 2183 int i; 2184 2185 p = (ACPI_OBJECT *)bufp->Pointer; 2186 if (p->Type == ACPI_TYPE_INTEGER) { 2187 *number = p->Integer.Value; 2188 return (AE_OK); 2189 } 2190 if (p->Type != ACPI_TYPE_BUFFER) 2191 return (AE_TYPE); 2192 if (p->Buffer.Length > sizeof(int)) 2193 return (AE_BAD_DATA); 2194 2195 *number = 0; 2196 val = p->Buffer.Pointer; 2197 for (i = 0; i < p->Buffer.Length; i++) 2198 *number += val[i] << (i * 8); 2199 return (AE_OK); 2200 } 2201 2202 /* 2203 * Iterate over the elements of an a package object, calling the supplied 2204 * function for each element. 2205 * 2206 * XXX possible enhancement might be to abort traversal on error. 2207 */ 2208 ACPI_STATUS 2209 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2210 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2211 { 2212 ACPI_OBJECT *comp; 2213 int i; 2214 2215 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2216 return (AE_BAD_PARAMETER); 2217 2218 /* Iterate over components */ 2219 i = 0; 2220 comp = pkg->Package.Elements; 2221 for (; i < pkg->Package.Count; i++, comp++) 2222 func(comp, arg); 2223 2224 return (AE_OK); 2225 } 2226 2227 /* 2228 * Find the (index)th resource object in a set. 2229 */ 2230 ACPI_STATUS 2231 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2232 { 2233 ACPI_RESOURCE *rp; 2234 int i; 2235 2236 rp = (ACPI_RESOURCE *)buf->Pointer; 2237 i = index; 2238 while (i-- > 0) { 2239 /* Range check */ 2240 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2241 return (AE_BAD_PARAMETER); 2242 2243 /* Check for terminator */ 2244 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2245 return (AE_NOT_FOUND); 2246 rp = ACPI_NEXT_RESOURCE(rp); 2247 } 2248 if (resp != NULL) 2249 *resp = rp; 2250 2251 return (AE_OK); 2252 } 2253 2254 /* 2255 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2256 * 2257 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2258 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2259 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2260 * resources. 2261 */ 2262 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2263 2264 ACPI_STATUS 2265 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2266 { 2267 ACPI_RESOURCE *rp; 2268 void *newp; 2269 2270 /* Initialise the buffer if necessary. */ 2271 if (buf->Pointer == NULL) { 2272 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2273 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2274 return (AE_NO_MEMORY); 2275 rp = (ACPI_RESOURCE *)buf->Pointer; 2276 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2277 rp->Length = ACPI_RS_SIZE_MIN; 2278 } 2279 if (res == NULL) 2280 return (AE_OK); 2281 2282 /* 2283 * Scan the current buffer looking for the terminator. 2284 * This will either find the terminator or hit the end 2285 * of the buffer and return an error. 2286 */ 2287 rp = (ACPI_RESOURCE *)buf->Pointer; 2288 for (;;) { 2289 /* Range check, don't go outside the buffer */ 2290 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2291 return (AE_BAD_PARAMETER); 2292 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2293 break; 2294 rp = ACPI_NEXT_RESOURCE(rp); 2295 } 2296 2297 /* 2298 * Check the size of the buffer and expand if required. 2299 * 2300 * Required size is: 2301 * size of existing resources before terminator + 2302 * size of new resource and header + 2303 * size of terminator. 2304 * 2305 * Note that this loop should really only run once, unless 2306 * for some reason we are stuffing a *really* huge resource. 2307 */ 2308 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2309 res->Length + ACPI_RS_SIZE_NO_DATA + 2310 ACPI_RS_SIZE_MIN) >= buf->Length) { 2311 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2312 return (AE_NO_MEMORY); 2313 bcopy(buf->Pointer, newp, buf->Length); 2314 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2315 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2316 AcpiOsFree(buf->Pointer); 2317 buf->Pointer = newp; 2318 buf->Length += buf->Length; 2319 } 2320 2321 /* Insert the new resource. */ 2322 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2323 2324 /* And add the terminator. */ 2325 rp = ACPI_NEXT_RESOURCE(rp); 2326 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2327 rp->Length = ACPI_RS_SIZE_MIN; 2328 2329 return (AE_OK); 2330 } 2331 2332 /* 2333 * Set interrupt model. 2334 */ 2335 ACPI_STATUS 2336 acpi_SetIntrModel(int model) 2337 { 2338 2339 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2340 } 2341 2342 /* 2343 * DEPRECATED. This interface has serious deficiencies and will be 2344 * removed. 2345 * 2346 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2347 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2348 */ 2349 ACPI_STATUS 2350 acpi_SetSleepState(struct acpi_softc *sc, int state) 2351 { 2352 static int once; 2353 2354 if (!once) { 2355 device_printf(sc->acpi_dev, 2356 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2357 once = 1; 2358 } 2359 return (acpi_EnterSleepState(sc, state)); 2360 } 2361 2362 static void 2363 acpi_sleep_force(void *arg) 2364 { 2365 struct acpi_softc *sc; 2366 2367 sc = arg; 2368 device_printf(sc->acpi_dev, 2369 "suspend request timed out, forcing sleep now\n"); 2370 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2371 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2372 sc->acpi_next_sstate); 2373 } 2374 2375 /* 2376 * Request that the system enter the given suspend state. All /dev/apm 2377 * devices and devd(8) will be notified. Userland then has a chance to 2378 * save state and acknowledge the request. The system sleeps once all 2379 * acks are in. 2380 */ 2381 int 2382 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2383 { 2384 #ifdef notyet 2385 struct apm_clone_data *clone; 2386 #endif 2387 2388 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2389 return (EINVAL); 2390 2391 /* S5 (soft-off) should be entered directly with no waiting. */ 2392 if (state == ACPI_STATE_S5) { 2393 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2394 return (0); 2395 else 2396 return (ENXIO); 2397 } 2398 2399 /* This platform does not support acpi suspend/resume. */ 2400 return (EOPNOTSUPP); 2401 2402 /* If a suspend request is already in progress, just return. */ 2403 ACPI_LOCK(acpi); 2404 if (sc->acpi_next_sstate != 0) { 2405 ACPI_UNLOCK(acpi); 2406 return (0); 2407 } 2408 2409 /* Record the pending state and notify all apm devices. */ 2410 sc->acpi_next_sstate = state; 2411 #if 0 2412 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2413 clone->notify_status = APM_EV_NONE; 2414 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2415 KNOTE(&clone->sel_read.si_note, 0); 2416 } 2417 } 2418 #endif 2419 2420 /* If devd(8) is not running, immediately enter the sleep state. */ 2421 if (devctl_process_running() == FALSE) { 2422 ACPI_UNLOCK(acpi); 2423 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2424 return (0); 2425 } else { 2426 return (ENXIO); 2427 } 2428 } 2429 2430 /* Now notify devd(8) also. */ 2431 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2432 2433 /* 2434 * Set a timeout to fire if userland doesn't ack the suspend request 2435 * in time. This way we still eventually go to sleep if we were 2436 * overheating or running low on battery, even if userland is hung. 2437 * We cancel this timeout once all userland acks are in or the 2438 * suspend request is aborted. 2439 */ 2440 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2441 ACPI_UNLOCK(acpi); 2442 2443 return (0); 2444 } 2445 2446 /* 2447 * Acknowledge (or reject) a pending sleep state. The caller has 2448 * prepared for suspend and is now ready for it to proceed. If the 2449 * error argument is non-zero, it indicates suspend should be cancelled 2450 * and gives an errno value describing why. Once all votes are in, 2451 * we suspend the system. 2452 */ 2453 int 2454 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2455 { 2456 struct acpi_softc *sc; 2457 int ret, sleeping; 2458 2459 /* This platform does not support acpi suspend/resume. */ 2460 return (EOPNOTSUPP); 2461 2462 /* If no pending sleep state, return an error. */ 2463 ACPI_LOCK(acpi); 2464 sc = clone->acpi_sc; 2465 if (sc->acpi_next_sstate == 0) { 2466 ACPI_UNLOCK(acpi); 2467 return (ENXIO); 2468 } 2469 2470 /* Caller wants to abort suspend process. */ 2471 if (error) { 2472 sc->acpi_next_sstate = 0; 2473 callout_stop(&sc->susp_force_to); 2474 device_printf(sc->acpi_dev, 2475 "listener on %s cancelled the pending suspend\n", 2476 devtoname(clone->cdev)); 2477 ACPI_UNLOCK(acpi); 2478 return (0); 2479 } 2480 2481 /* 2482 * Mark this device as acking the suspend request. Then, walk through 2483 * all devices, seeing if they agree yet. We only count devices that 2484 * are writable since read-only devices couldn't ack the request. 2485 */ 2486 clone->notify_status = APM_EV_ACKED; 2487 sleeping = TRUE; 2488 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2489 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2490 clone->notify_status != APM_EV_ACKED) { 2491 sleeping = FALSE; 2492 break; 2493 } 2494 } 2495 2496 /* If all devices have voted "yes", we will suspend now. */ 2497 if (sleeping) 2498 callout_stop(&sc->susp_force_to); 2499 ACPI_UNLOCK(acpi); 2500 ret = 0; 2501 if (sleeping) { 2502 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2503 ret = ENODEV; 2504 } 2505 2506 return (ret); 2507 } 2508 2509 static void 2510 acpi_sleep_enable(void *arg) 2511 { 2512 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2513 } 2514 2515 enum acpi_sleep_state { 2516 ACPI_SS_NONE, 2517 ACPI_SS_GPE_SET, 2518 ACPI_SS_DEV_SUSPEND, 2519 ACPI_SS_SLP_PREP, 2520 ACPI_SS_SLEPT, 2521 }; 2522 2523 /* 2524 * Enter the desired system sleep state. 2525 * 2526 * Currently we support S1-S5 but S4 is only S4BIOS 2527 */ 2528 static ACPI_STATUS 2529 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2530 { 2531 ACPI_STATUS status; 2532 UINT8 TypeA; 2533 UINT8 TypeB; 2534 enum acpi_sleep_state slp_state; 2535 2536 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2537 2538 /* Re-entry once we're suspending is not allowed. */ 2539 status = AE_OK; 2540 ACPI_LOCK(acpi); 2541 if (sc->acpi_sleep_disabled) { 2542 ACPI_UNLOCK(acpi); 2543 device_printf(sc->acpi_dev, 2544 "suspend request ignored (not ready yet)\n"); 2545 return (AE_ERROR); 2546 } 2547 sc->acpi_sleep_disabled = 1; 2548 ACPI_UNLOCK(acpi); 2549 2550 /* 2551 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2552 * drivers need this. 2553 */ 2554 //get_mplock(); 2555 2556 slp_state = ACPI_SS_NONE; 2557 switch (state) { 2558 case ACPI_STATE_S1: 2559 case ACPI_STATE_S2: 2560 case ACPI_STATE_S3: 2561 case ACPI_STATE_S4: 2562 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2563 if (status == AE_NOT_FOUND) { 2564 device_printf(sc->acpi_dev, 2565 "Sleep state S%d not supported by BIOS\n", state); 2566 break; 2567 } else if (ACPI_FAILURE(status)) { 2568 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2569 AcpiFormatException(status)); 2570 break; 2571 } 2572 2573 sc->acpi_sstate = state; 2574 2575 /* Enable any GPEs as appropriate and requested by the user. */ 2576 acpi_wake_prep_walk(state); 2577 slp_state = ACPI_SS_GPE_SET; 2578 2579 /* 2580 * Inform all devices that we are going to sleep. If at least one 2581 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2582 * 2583 * XXX Note that a better two-pass approach with a 'veto' pass 2584 * followed by a "real thing" pass would be better, but the current 2585 * bus interface does not provide for this. 2586 */ 2587 if (DEVICE_SUSPEND(root_bus) != 0) { 2588 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2589 break; 2590 } 2591 slp_state = ACPI_SS_DEV_SUSPEND; 2592 2593 /* If testing device suspend only, back out of everything here. */ 2594 if (acpi_susp_bounce) 2595 break; 2596 2597 status = AcpiEnterSleepStatePrep(state); 2598 if (ACPI_FAILURE(status)) { 2599 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2600 AcpiFormatException(status)); 2601 break; 2602 } 2603 slp_state = ACPI_SS_SLP_PREP; 2604 2605 if (sc->acpi_sleep_delay > 0) 2606 DELAY(sc->acpi_sleep_delay * 1000000); 2607 2608 if (state != ACPI_STATE_S1) { 2609 acpi_sleep_machdep(sc, state); 2610 2611 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2612 if (state == ACPI_STATE_S4) 2613 AcpiEnable(); 2614 } else { 2615 ACPI_DISABLE_IRQS(); 2616 status = AcpiEnterSleepState(state); 2617 if (ACPI_FAILURE(status)) { 2618 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2619 AcpiFormatException(status)); 2620 break; 2621 } 2622 } 2623 slp_state = ACPI_SS_SLEPT; 2624 break; 2625 case ACPI_STATE_S5: 2626 /* 2627 * Shut down cleanly and power off. This will call us back through the 2628 * shutdown handlers. 2629 */ 2630 shutdown_nice(RB_POWEROFF); 2631 break; 2632 case ACPI_STATE_S0: 2633 default: 2634 status = AE_BAD_PARAMETER; 2635 break; 2636 } 2637 2638 /* 2639 * Back out state according to how far along we got in the suspend 2640 * process. This handles both the error and success cases. 2641 */ 2642 sc->acpi_next_sstate = 0; 2643 if (slp_state >= ACPI_SS_GPE_SET) { 2644 acpi_wake_prep_walk(state); 2645 sc->acpi_sstate = ACPI_STATE_S0; 2646 } 2647 if (slp_state >= ACPI_SS_SLP_PREP) 2648 AcpiLeaveSleepState(state); 2649 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2650 DEVICE_RESUME(root_bus); 2651 if (slp_state >= ACPI_SS_SLEPT) 2652 acpi_enable_fixed_events(sc); 2653 2654 /* Allow another sleep request after a while. */ 2655 /* XXX: needs timeout */ 2656 if (state != ACPI_STATE_S5) 2657 acpi_sleep_enable(sc); 2658 2659 /* Run /etc/rc.resume after we are back. */ 2660 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2661 2662 //rel_mplock(); 2663 2664 return_ACPI_STATUS (status); 2665 } 2666 2667 /* Enable or disable the device's GPE. */ 2668 int 2669 acpi_wake_set_enable(device_t dev, int enable) 2670 { 2671 struct acpi_prw_data prw; 2672 ACPI_STATUS status; 2673 int flags; 2674 2675 /* Make sure the device supports waking the system and get the GPE. */ 2676 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2677 return (ENXIO); 2678 2679 flags = acpi_get_flags(dev); 2680 if (enable) { 2681 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2682 ACPI_GPE_ENABLE); 2683 if (ACPI_FAILURE(status)) { 2684 device_printf(dev, "enable wake failed\n"); 2685 return (ENXIO); 2686 } 2687 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2688 } else { 2689 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2690 ACPI_GPE_DISABLE); 2691 if (ACPI_FAILURE(status)) { 2692 device_printf(dev, "disable wake failed\n"); 2693 return (ENXIO); 2694 } 2695 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2696 } 2697 2698 return (0); 2699 } 2700 2701 static int 2702 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2703 { 2704 struct acpi_prw_data prw; 2705 device_t dev; 2706 2707 /* Check that this is a wake-capable device and get its GPE. */ 2708 if (acpi_parse_prw(handle, &prw) != 0) 2709 return (ENXIO); 2710 dev = acpi_get_device(handle); 2711 2712 /* 2713 * The destination sleep state must be less than (i.e., higher power) 2714 * or equal to the value specified by _PRW. If this GPE cannot be 2715 * enabled for the next sleep state, then disable it. If it can and 2716 * the user requested it be enabled, turn on any required power resources 2717 * and set _PSW. 2718 */ 2719 if (sstate > prw.lowest_wake) { 2720 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2721 if (bootverbose) 2722 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2723 acpi_name(handle), sstate); 2724 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2725 acpi_pwr_wake_enable(handle, 1); 2726 acpi_SetInteger(handle, "_PSW", 1); 2727 if (bootverbose) 2728 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2729 acpi_name(handle), sstate); 2730 } 2731 2732 return (0); 2733 } 2734 2735 static int 2736 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2737 { 2738 struct acpi_prw_data prw; 2739 device_t dev; 2740 2741 /* 2742 * Check that this is a wake-capable device and get its GPE. Return 2743 * now if the user didn't enable this device for wake. 2744 */ 2745 if (acpi_parse_prw(handle, &prw) != 0) 2746 return (ENXIO); 2747 dev = acpi_get_device(handle); 2748 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2749 return (0); 2750 2751 /* 2752 * If this GPE couldn't be enabled for the previous sleep state, it was 2753 * disabled before going to sleep so re-enable it. If it was enabled, 2754 * clear _PSW and turn off any power resources it used. 2755 */ 2756 if (sstate > prw.lowest_wake) { 2757 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2758 if (bootverbose) 2759 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2760 } else { 2761 acpi_SetInteger(handle, "_PSW", 0); 2762 acpi_pwr_wake_enable(handle, 0); 2763 if (bootverbose) 2764 device_printf(dev, "run_prep cleaned up for %s\n", 2765 acpi_name(handle)); 2766 } 2767 2768 return (0); 2769 } 2770 2771 static ACPI_STATUS 2772 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2773 { 2774 int sstate; 2775 2776 /* If suspending, run the sleep prep function, otherwise wake. */ 2777 sstate = *(int *)context; 2778 if (AcpiGbl_SystemAwakeAndRunning) 2779 acpi_wake_sleep_prep(handle, sstate); 2780 else 2781 acpi_wake_run_prep(handle, sstate); 2782 return (AE_OK); 2783 } 2784 2785 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2786 static int 2787 acpi_wake_prep_walk(int sstate) 2788 { 2789 ACPI_HANDLE sb_handle; 2790 2791 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2792 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2793 acpi_wake_prep, NULL, &sstate, NULL); 2794 } 2795 return (0); 2796 } 2797 2798 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2799 static int 2800 acpi_wake_sysctl_walk(device_t dev) 2801 { 2802 #ifdef notyet 2803 int error, i, numdevs; 2804 device_t *devlist; 2805 device_t child; 2806 ACPI_STATUS status; 2807 2808 error = device_get_children(dev, &devlist, &numdevs); 2809 if (error != 0 || numdevs == 0) { 2810 if (numdevs == 0) 2811 kfree(devlist, M_TEMP); 2812 return (error); 2813 } 2814 for (i = 0; i < numdevs; i++) { 2815 child = devlist[i]; 2816 acpi_wake_sysctl_walk(child); 2817 if (!device_is_attached(child)) 2818 continue; 2819 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2820 if (ACPI_SUCCESS(status)) { 2821 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2822 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2823 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2824 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2825 } 2826 } 2827 kfree(devlist, M_TEMP); 2828 #endif 2829 2830 return (0); 2831 } 2832 2833 #ifdef notyet 2834 /* Enable or disable wake from userland. */ 2835 static int 2836 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2837 { 2838 int enable, error; 2839 device_t dev; 2840 2841 dev = (device_t)arg1; 2842 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2843 2844 error = sysctl_handle_int(oidp, &enable, 0, req); 2845 if (error != 0 || req->newptr == NULL) 2846 return (error); 2847 if (enable != 0 && enable != 1) 2848 return (EINVAL); 2849 2850 return (acpi_wake_set_enable(dev, enable)); 2851 } 2852 #endif 2853 2854 /* Parse a device's _PRW into a structure. */ 2855 int 2856 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2857 { 2858 ACPI_STATUS status; 2859 ACPI_BUFFER prw_buffer; 2860 ACPI_OBJECT *res, *res2; 2861 int error, i, power_count; 2862 2863 if (h == NULL || prw == NULL) 2864 return (EINVAL); 2865 2866 /* 2867 * The _PRW object (7.2.9) is only required for devices that have the 2868 * ability to wake the system from a sleeping state. 2869 */ 2870 error = EINVAL; 2871 prw_buffer.Pointer = NULL; 2872 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2873 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2874 if (ACPI_FAILURE(status)) 2875 return (ENOENT); 2876 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2877 if (res == NULL) 2878 return (ENOENT); 2879 if (!ACPI_PKG_VALID(res, 2)) 2880 goto out; 2881 2882 /* 2883 * Element 1 of the _PRW object: 2884 * The lowest power system sleeping state that can be entered while still 2885 * providing wake functionality. The sleeping state being entered must 2886 * be less than (i.e., higher power) or equal to this value. 2887 */ 2888 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2889 goto out; 2890 2891 /* 2892 * Element 0 of the _PRW object: 2893 */ 2894 switch (res->Package.Elements[0].Type) { 2895 case ACPI_TYPE_INTEGER: 2896 /* 2897 * If the data type of this package element is numeric, then this 2898 * _PRW package element is the bit index in the GPEx_EN, in the 2899 * GPE blocks described in the FADT, of the enable bit that is 2900 * enabled for the wake event. 2901 */ 2902 prw->gpe_handle = NULL; 2903 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2904 error = 0; 2905 break; 2906 case ACPI_TYPE_PACKAGE: 2907 /* 2908 * If the data type of this package element is a package, then this 2909 * _PRW package element is itself a package containing two 2910 * elements. The first is an object reference to the GPE Block 2911 * device that contains the GPE that will be triggered by the wake 2912 * event. The second element is numeric and it contains the bit 2913 * index in the GPEx_EN, in the GPE Block referenced by the 2914 * first element in the package, of the enable bit that is enabled for 2915 * the wake event. 2916 * 2917 * For example, if this field is a package then it is of the form: 2918 * Package() {\_SB.PCI0.ISA.GPE, 2} 2919 */ 2920 res2 = &res->Package.Elements[0]; 2921 if (!ACPI_PKG_VALID(res2, 2)) 2922 goto out; 2923 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2924 if (prw->gpe_handle == NULL) 2925 goto out; 2926 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2927 goto out; 2928 error = 0; 2929 break; 2930 default: 2931 goto out; 2932 } 2933 2934 /* Elements 2 to N of the _PRW object are power resources. */ 2935 power_count = res->Package.Count - 2; 2936 if (power_count > ACPI_PRW_MAX_POWERRES) { 2937 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2938 power_count = 0; 2939 } 2940 prw->power_res_count = power_count; 2941 for (i = 0; i < power_count; i++) 2942 prw->power_res[i] = res->Package.Elements[i]; 2943 2944 out: 2945 if (prw_buffer.Pointer != NULL) 2946 AcpiOsFree(prw_buffer.Pointer); 2947 return (error); 2948 } 2949 2950 /* 2951 * ACPI Event Handlers 2952 */ 2953 2954 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2955 2956 static void 2957 acpi_system_eventhandler_sleep(void *arg, int state) 2958 { 2959 struct acpi_softc *sc; 2960 int ret; 2961 2962 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2963 2964 sc = arg; 2965 2966 /* Check if button action is disabled. */ 2967 if (state == ACPI_S_STATES_MAX + 1) 2968 return; 2969 2970 /* Request that the system prepare to enter the given suspend state. */ 2971 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2972 if (ret != 0) 2973 device_printf(sc->acpi_dev, 2974 "request to enter state S%d failed (err %d)\n", state, ret); 2975 2976 return_VOID; 2977 } 2978 2979 static void 2980 acpi_system_eventhandler_wakeup(void *arg, int state) 2981 { 2982 2983 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2984 2985 /* Currently, nothing to do for wakeup. */ 2986 2987 return_VOID; 2988 } 2989 2990 /* 2991 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2992 */ 2993 UINT32 2994 acpi_event_power_button_sleep(void *context) 2995 { 2996 struct acpi_softc *sc = (struct acpi_softc *)context; 2997 2998 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2999 3000 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 3001 3002 return_VALUE (ACPI_INTERRUPT_HANDLED); 3003 } 3004 3005 UINT32 3006 acpi_event_power_button_wake(void *context) 3007 { 3008 struct acpi_softc *sc = (struct acpi_softc *)context; 3009 3010 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3011 3012 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 3013 3014 return_VALUE (ACPI_INTERRUPT_HANDLED); 3015 } 3016 3017 UINT32 3018 acpi_event_sleep_button_sleep(void *context) 3019 { 3020 struct acpi_softc *sc = (struct acpi_softc *)context; 3021 3022 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3023 3024 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3025 3026 return_VALUE (ACPI_INTERRUPT_HANDLED); 3027 } 3028 3029 UINT32 3030 acpi_event_sleep_button_wake(void *context) 3031 { 3032 struct acpi_softc *sc = (struct acpi_softc *)context; 3033 3034 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3035 3036 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3037 3038 return_VALUE (ACPI_INTERRUPT_HANDLED); 3039 } 3040 3041 /* 3042 * XXX This static buffer is suboptimal. There is no locking so only 3043 * use this for single-threaded callers. 3044 */ 3045 char * 3046 acpi_name(ACPI_HANDLE handle) 3047 { 3048 ACPI_BUFFER buf; 3049 static char data[256]; 3050 3051 buf.Length = sizeof(data); 3052 buf.Pointer = data; 3053 3054 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3055 return (data); 3056 return ("(unknown)"); 3057 } 3058 3059 /* 3060 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3061 * parts of the namespace. 3062 */ 3063 int 3064 acpi_avoid(ACPI_HANDLE handle) 3065 { 3066 char *cp, *env, *np; 3067 int len; 3068 3069 np = acpi_name(handle); 3070 if (*np == '\\') 3071 np++; 3072 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 3073 return (0); 3074 3075 /* Scan the avoid list checking for a match */ 3076 cp = env; 3077 for (;;) { 3078 while (*cp != 0 && isspace(*cp)) 3079 cp++; 3080 if (*cp == 0) 3081 break; 3082 len = 0; 3083 while (cp[len] != 0 && !isspace(cp[len])) 3084 len++; 3085 if (!strncmp(cp, np, len)) { 3086 kfreeenv(env); 3087 return(1); 3088 } 3089 cp += len; 3090 } 3091 kfreeenv(env); 3092 3093 return (0); 3094 } 3095 3096 /* 3097 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3098 */ 3099 int 3100 acpi_disabled(char *subsys) 3101 { 3102 char *cp, *env; 3103 int len; 3104 3105 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3106 return (0); 3107 if (strcmp(env, "all") == 0) { 3108 kfreeenv(env); 3109 return (1); 3110 } 3111 3112 /* Scan the disable list, checking for a match. */ 3113 cp = env; 3114 for (;;) { 3115 while (*cp != '\0' && isspace(*cp)) 3116 cp++; 3117 if (*cp == '\0') 3118 break; 3119 len = 0; 3120 while (cp[len] != '\0' && !isspace(cp[len])) 3121 len++; 3122 if (strncmp(cp, subsys, len) == 0) { 3123 kfreeenv(env); 3124 return (1); 3125 } 3126 cp += len; 3127 } 3128 kfreeenv(env); 3129 3130 return (0); 3131 } 3132 3133 /* 3134 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3135 * components are enabled by default. The ones that are not have to be 3136 * enabled via debug.acpi.enabled. 3137 */ 3138 int 3139 acpi_enabled(char *subsys) 3140 { 3141 char *cp, *env; 3142 int len; 3143 3144 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3145 return (0); 3146 if (strcmp(env, "all") == 0) { 3147 kfreeenv(env); 3148 return (1); 3149 } 3150 3151 /* Scan the enable list, checking for a match. */ 3152 cp = env; 3153 for (;;) { 3154 while (*cp != '\0' && isspace(*cp)) 3155 cp++; 3156 if (*cp == '\0') 3157 break; 3158 len = 0; 3159 while (cp[len] != '\0' && !isspace(cp[len])) 3160 len++; 3161 if (strncmp(cp, subsys, len) == 0) { 3162 kfreeenv(env); 3163 return (1); 3164 } 3165 cp += len; 3166 } 3167 kfreeenv(env); 3168 3169 return (0); 3170 } 3171 3172 /* 3173 * Control interface. 3174 * 3175 * We multiplex ioctls for all participating ACPI devices here. Individual 3176 * drivers wanting to be accessible via /dev/acpi should use the 3177 * register/deregister interface to make their handlers visible. 3178 */ 3179 struct acpi_ioctl_hook 3180 { 3181 TAILQ_ENTRY(acpi_ioctl_hook) link; 3182 u_long cmd; 3183 acpi_ioctl_fn fn; 3184 void *arg; 3185 }; 3186 3187 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3188 static int acpi_ioctl_hooks_initted; 3189 3190 int 3191 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3192 { 3193 struct acpi_ioctl_hook *hp; 3194 3195 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3196 return (ENOMEM); 3197 hp->cmd = cmd; 3198 hp->fn = fn; 3199 hp->arg = arg; 3200 3201 ACPI_LOCK(acpi); 3202 if (acpi_ioctl_hooks_initted == 0) { 3203 TAILQ_INIT(&acpi_ioctl_hooks); 3204 acpi_ioctl_hooks_initted = 1; 3205 } 3206 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3207 ACPI_UNLOCK(acpi); 3208 3209 return (0); 3210 } 3211 3212 void 3213 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3214 { 3215 struct acpi_ioctl_hook *hp; 3216 3217 ACPI_LOCK(acpi); 3218 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3219 if (hp->cmd == cmd && hp->fn == fn) 3220 break; 3221 3222 if (hp != NULL) { 3223 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3224 kfree(hp, M_ACPIDEV); 3225 } 3226 ACPI_UNLOCK(acpi); 3227 } 3228 3229 static int 3230 acpiopen(struct dev_open_args *ap) 3231 { 3232 return (0); 3233 } 3234 3235 static int 3236 acpiclose(struct dev_close_args *ap) 3237 { 3238 return (0); 3239 } 3240 3241 static int 3242 acpiioctl(struct dev_ioctl_args *ap) 3243 { 3244 struct acpi_softc *sc; 3245 struct acpi_ioctl_hook *hp; 3246 int error, state; 3247 3248 error = 0; 3249 hp = NULL; 3250 sc = ap->a_head.a_dev->si_drv1; 3251 3252 /* 3253 * Scan the list of registered ioctls, looking for handlers. 3254 */ 3255 lwkt_gettoken(&acpi_token); 3256 ACPI_LOCK(acpi); 3257 if (acpi_ioctl_hooks_initted) { 3258 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3259 if (hp->cmd == ap->a_cmd) 3260 break; 3261 } 3262 } 3263 ACPI_UNLOCK(acpi); 3264 if (hp) { 3265 error = hp->fn(ap->a_cmd, ap->a_data, hp->arg); 3266 lwkt_reltoken(&acpi_token); 3267 return error; 3268 } 3269 3270 /* 3271 * Core ioctls are not permitted for non-writable user. 3272 * Currently, other ioctls just fetch information. 3273 * Not changing system behavior. 3274 */ 3275 if ((ap->a_fflag & FWRITE) == 0) { 3276 lwkt_reltoken(&acpi_token); 3277 return (EPERM); 3278 } 3279 3280 /* Core system ioctls. */ 3281 switch (ap->a_cmd) { 3282 case ACPIIO_REQSLPSTATE: 3283 state = *(int *)ap->a_data; 3284 if (state != ACPI_STATE_S5) 3285 error = acpi_ReqSleepState(sc, state); 3286 else { 3287 device_printf(sc->acpi_dev, 3288 "power off via acpi ioctl not supported\n"); 3289 error = ENXIO; 3290 } 3291 break; 3292 case ACPIIO_ACKSLPSTATE: 3293 error = EOPNOTSUPP; 3294 #if 0 /* notyet */ 3295 error = *(int *)ap->a_data; 3296 error = acpi_AckSleepState(sc->acpi_clone, error); 3297 #endif 3298 break; 3299 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3300 error = EINVAL; 3301 state = *(int *)ap->a_data; 3302 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3303 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3304 error = 0; 3305 break; 3306 case ACPIIO_DO_MCALL: 3307 if (acpi_allow_mcall == 1) { 3308 struct acpi_mcall_ioctl_arg *params; 3309 ACPI_BUFFER result = { ACPI_ALLOCATE_BUFFER, NULL }; 3310 ACPI_OBJECT *resobj; 3311 3312 error = EINVAL; 3313 params = (struct acpi_mcall_ioctl_arg *)ap->a_data; 3314 params->retval = AcpiEvaluateObject(NULL, params->path, 3315 ¶ms->args, &result); 3316 if (ACPI_SUCCESS(params->retval) && result.Pointer != NULL && 3317 params->result.Pointer != NULL) { 3318 params->result.Length = min(params->result.Length, 3319 result.Length); 3320 copyout(result.Pointer, params->result.Pointer, 3321 params->result.Length); 3322 params->reslen = result.Length; 3323 if (result.Length >= sizeof(ACPI_OBJECT)) { 3324 resobj = (ACPI_OBJECT *)params->result.Pointer; 3325 switch (resobj->Type) { 3326 case ACPI_TYPE_STRING: 3327 resobj->String.Pointer = (char *) 3328 ((UINT8 *)(resobj->String.Pointer) - 3329 (UINT8 *)result.Pointer + 3330 (UINT8 *)resobj); 3331 break; 3332 case ACPI_TYPE_BUFFER: 3333 resobj->Buffer.Pointer -= (UINT8 *)result.Pointer - 3334 (UINT8 *)resobj; 3335 break; 3336 } 3337 } 3338 error = 0; 3339 } 3340 if (result.Pointer != NULL) 3341 AcpiOsFree(result.Pointer); 3342 } else { 3343 device_printf(sc->acpi_dev, 3344 "debug.acpi.allow_method_calls must be set\n"); 3345 error = ENXIO; 3346 } 3347 break; 3348 default: 3349 error = ENXIO; 3350 break; 3351 } 3352 lwkt_reltoken(&acpi_token); 3353 3354 return (error); 3355 } 3356 3357 static int 3358 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3359 { 3360 int error; 3361 struct sbuf sb; 3362 UINT8 state, TypeA, TypeB; 3363 3364 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3365 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3366 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3367 sbuf_printf(&sb, "S%d ", state); 3368 sbuf_trim(&sb); 3369 sbuf_finish(&sb); 3370 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3371 sbuf_delete(&sb); 3372 return (error); 3373 } 3374 3375 static int 3376 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3377 { 3378 char sleep_state[10]; 3379 int error; 3380 u_int new_state, old_state; 3381 3382 old_state = *(u_int *)oidp->oid_arg1; 3383 if (old_state > ACPI_S_STATES_MAX + 1) 3384 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3385 else 3386 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3387 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3388 if (error == 0 && req->newptr != NULL) { 3389 new_state = ACPI_STATE_S0; 3390 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3391 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3392 break; 3393 if (new_state <= ACPI_S_STATES_MAX + 1) { 3394 if (new_state != old_state) 3395 *(u_int *)oidp->oid_arg1 = new_state; 3396 } else 3397 error = EINVAL; 3398 } 3399 3400 return (error); 3401 } 3402 3403 /* Inform devctl(4) when we receive a Notify. */ 3404 void 3405 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3406 { 3407 char notify_buf[16]; 3408 ACPI_BUFFER handle_buf; 3409 ACPI_STATUS status; 3410 3411 if (subsystem == NULL) 3412 return; 3413 3414 handle_buf.Pointer = NULL; 3415 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3416 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3417 if (ACPI_FAILURE(status)) 3418 return; 3419 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3420 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3421 AcpiOsFree(handle_buf.Pointer); 3422 } 3423 3424 #ifdef ACPI_DEBUG 3425 /* 3426 * Support for parsing debug options from the kernel environment. 3427 * 3428 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3429 * by specifying the names of the bits in the debug.acpi.layer and 3430 * debug.acpi.level environment variables. Bits may be unset by 3431 * prefixing the bit name with !. 3432 */ 3433 struct debugtag 3434 { 3435 char *name; 3436 UINT32 value; 3437 }; 3438 3439 static struct debugtag dbg_layer[] = { 3440 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3441 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3442 {"ACPI_EVENTS", ACPI_EVENTS}, 3443 {"ACPI_TABLES", ACPI_TABLES}, 3444 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3445 {"ACPI_PARSER", ACPI_PARSER}, 3446 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3447 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3448 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3449 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3450 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3451 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3452 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3453 3454 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3455 {"ACPI_BATTERY", ACPI_BATTERY}, 3456 {"ACPI_BUS", ACPI_BUS}, 3457 {"ACPI_BUTTON", ACPI_BUTTON}, 3458 {"ACPI_EC", ACPI_EC}, 3459 {"ACPI_FAN", ACPI_FAN}, 3460 {"ACPI_POWERRES", ACPI_POWERRES}, 3461 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3462 {"ACPI_THERMAL", ACPI_THERMAL}, 3463 {"ACPI_TIMER", ACPI_TIMER}, 3464 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3465 {NULL, 0} 3466 }; 3467 3468 static struct debugtag dbg_level[] = { 3469 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3470 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3471 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3472 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3473 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3474 3475 /* Trace verbosity level 1 [Standard Trace Level] */ 3476 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3477 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3478 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3479 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3480 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3481 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3482 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3483 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3484 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3485 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3486 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3487 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3488 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3489 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3490 {"ACPI_LV_EVALUATION", ACPI_LV_EVALUATION}, 3491 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3492 3493 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3494 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3495 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3496 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3497 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3498 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3499 3500 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3501 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3502 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3503 {"ACPI_LV_IO", ACPI_LV_IO}, 3504 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3505 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3506 3507 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3508 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3509 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3510 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3511 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3512 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3513 {NULL, 0} 3514 }; 3515 3516 static void 3517 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3518 { 3519 char *ep; 3520 int i, l; 3521 int set; 3522 3523 while (*cp) { 3524 if (isspace(*cp)) { 3525 cp++; 3526 continue; 3527 } 3528 ep = cp; 3529 while (*ep && !isspace(*ep)) 3530 ep++; 3531 if (*cp == '!') { 3532 set = 0; 3533 cp++; 3534 if (cp == ep) 3535 continue; 3536 } else { 3537 set = 1; 3538 } 3539 l = ep - cp; 3540 for (i = 0; tag[i].name != NULL; i++) { 3541 if (!strncmp(cp, tag[i].name, l)) { 3542 if (set) 3543 *flag |= tag[i].value; 3544 else 3545 *flag &= ~tag[i].value; 3546 } 3547 } 3548 cp = ep; 3549 } 3550 } 3551 3552 static void 3553 acpi_set_debugging(void *junk) 3554 { 3555 char *layer, *level; 3556 3557 if (cold) { 3558 AcpiDbgLayer = 0; 3559 AcpiDbgLevel = 0; 3560 } 3561 3562 layer = kgetenv("debug.acpi.layer"); 3563 level = kgetenv("debug.acpi.level"); 3564 if (layer == NULL && level == NULL) 3565 return; 3566 3567 kprintf("ACPI set debug"); 3568 if (layer != NULL) { 3569 if (strcmp("NONE", layer) != 0) 3570 kprintf(" layer '%s'", layer); 3571 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3572 kfreeenv(layer); 3573 } 3574 if (level != NULL) { 3575 if (strcmp("NONE", level) != 0) 3576 kprintf(" level '%s'", level); 3577 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3578 kfreeenv(level); 3579 } 3580 kprintf("\n"); 3581 } 3582 3583 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3584 NULL); 3585 3586 static int 3587 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3588 { 3589 int error, *dbg; 3590 struct debugtag *tag; 3591 struct sbuf sb; 3592 3593 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3594 return (ENOMEM); 3595 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3596 tag = &dbg_layer[0]; 3597 dbg = &AcpiDbgLayer; 3598 } else { 3599 tag = &dbg_level[0]; 3600 dbg = &AcpiDbgLevel; 3601 } 3602 3603 /* Get old values if this is a get request. */ 3604 ACPI_SERIAL_BEGIN(acpi); 3605 if (*dbg == 0) { 3606 sbuf_cpy(&sb, "NONE"); 3607 } else if (req->newptr == NULL) { 3608 for (; tag->name != NULL; tag++) { 3609 if ((*dbg & tag->value) == tag->value) 3610 sbuf_printf(&sb, "%s ", tag->name); 3611 } 3612 } 3613 sbuf_trim(&sb); 3614 sbuf_finish(&sb); 3615 3616 /* Copy out the old values to the user. */ 3617 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3618 sbuf_delete(&sb); 3619 3620 /* If the user is setting a string, parse it. */ 3621 if (error == 0 && req->newptr != NULL) { 3622 *dbg = 0; 3623 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3624 acpi_set_debugging(NULL); 3625 } 3626 ACPI_SERIAL_END(acpi); 3627 3628 return (error); 3629 } 3630 3631 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3632 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3633 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3634 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3635 #endif /* ACPI_DEBUG */ 3636 3637 static int 3638 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3639 { 3640 int error; 3641 int old; 3642 3643 old = acpi_debug_objects; 3644 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3645 if (error != 0 || req->newptr == NULL) 3646 return (error); 3647 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3648 return (0); 3649 3650 ACPI_SERIAL_BEGIN(acpi); 3651 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3652 ACPI_SERIAL_END(acpi); 3653 3654 return (0); 3655 } 3656 3657 3658 static int 3659 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3660 { 3661 char *p; 3662 size_t len; 3663 int i, j; 3664 3665 p = str; 3666 while (isspace(*p) || *p == ',') 3667 p++; 3668 len = strlen(p); 3669 if (len == 0) 3670 return (0); 3671 p = kstrdup(p, M_TEMP); 3672 for (i = 0; i < len; i++) 3673 if (p[i] == ',') 3674 p[i] = '\0'; 3675 i = j = 0; 3676 while (i < len) 3677 if (isspace(p[i]) || p[i] == '\0') 3678 i++; 3679 else { 3680 i += strlen(p + i) + 1; 3681 j++; 3682 } 3683 if (j == 0) { 3684 kfree(p, M_TEMP); 3685 return (0); 3686 } 3687 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3688 iface->num = j; 3689 i = j = 0; 3690 while (i < len) 3691 if (isspace(p[i]) || p[i] == '\0') 3692 i++; 3693 else { 3694 iface->data[j] = p + i; 3695 i += strlen(p + i) + 1; 3696 j++; 3697 } 3698 3699 return (j); 3700 } 3701 3702 static void 3703 acpi_free_interfaces(struct acpi_interface *iface) 3704 { 3705 kfree(iface->data[0], M_TEMP); 3706 kfree(iface->data, M_TEMP); 3707 } 3708 3709 static void 3710 acpi_reset_interfaces(device_t dev) 3711 { 3712 struct acpi_interface list; 3713 ACPI_STATUS status; 3714 int i; 3715 3716 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3717 for (i = 0; i < list.num; i++) { 3718 status = AcpiInstallInterface(list.data[i]); 3719 if (ACPI_FAILURE(status)) 3720 device_printf(dev, 3721 "failed to install _OSI(\"%s\"): %s\n", 3722 list.data[i], AcpiFormatException(status)); 3723 else if (bootverbose) 3724 device_printf(dev, "installed _OSI(\"%s\")\n", 3725 list.data[i]); 3726 } 3727 acpi_free_interfaces(&list); 3728 } 3729 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3730 for (i = 0; i < list.num; i++) { 3731 status = AcpiRemoveInterface(list.data[i]); 3732 if (ACPI_FAILURE(status)) 3733 device_printf(dev, 3734 "failed to remove _OSI(\"%s\"): %s\n", 3735 list.data[i], AcpiFormatException(status)); 3736 else if (bootverbose) 3737 device_printf(dev, "removed _OSI(\"%s\")\n", 3738 list.data[i]); 3739 } 3740 acpi_free_interfaces(&list); 3741 } 3742 } 3743 3744 static int 3745 acpi_pm_func(u_long cmd, void *arg, ...) 3746 { 3747 int state, acpi_state; 3748 int error; 3749 struct acpi_softc *sc; 3750 __va_list ap; 3751 3752 error = 0; 3753 switch (cmd) { 3754 case POWER_CMD_SUSPEND: 3755 sc = (struct acpi_softc *)arg; 3756 if (sc == NULL) { 3757 error = EINVAL; 3758 goto out; 3759 } 3760 3761 __va_start(ap, arg); 3762 state = __va_arg(ap, int); 3763 __va_end(ap); 3764 3765 switch (state) { 3766 case POWER_SLEEP_STATE_STANDBY: 3767 acpi_state = sc->acpi_standby_sx; 3768 break; 3769 case POWER_SLEEP_STATE_SUSPEND: 3770 acpi_state = sc->acpi_suspend_sx; 3771 break; 3772 case POWER_SLEEP_STATE_HIBERNATE: 3773 acpi_state = ACPI_STATE_S4; 3774 break; 3775 default: 3776 error = EINVAL; 3777 goto out; 3778 } 3779 3780 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3781 error = ENXIO; 3782 break; 3783 default: 3784 error = EINVAL; 3785 goto out; 3786 } 3787 3788 out: 3789 return (error); 3790 } 3791 3792 static void 3793 acpi_pm_register(void *arg) 3794 { 3795 if (!cold || resource_disabled("acpi", 0)) 3796 return; 3797 3798 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3799 } 3800 3801 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3802