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 static void acpi_call_fixup_pointers(ACPI_OBJECT *p, UINT8 *orig); 171 static int acpi_call_ioctl(caddr_t addr); 172 static ACPI_OBJECT_LIST *acpi_copyin_object_list(ACPI_OBJECT_LIST *src); 173 static void acpi_free_object_list(ACPI_OBJECT_LIST *list); 174 175 static device_method_t acpi_methods[] = { 176 /* Device interface */ 177 DEVMETHOD(device_identify, acpi_identify), 178 DEVMETHOD(device_probe, acpi_probe), 179 DEVMETHOD(device_attach, acpi_attach), 180 DEVMETHOD(device_shutdown, acpi_shutdown), 181 DEVMETHOD(device_detach, bus_generic_detach), 182 DEVMETHOD(device_suspend, acpi_suspend), 183 DEVMETHOD(device_resume, acpi_resume), 184 185 /* Bus interface */ 186 DEVMETHOD(bus_add_child, acpi_add_child), 187 DEVMETHOD(bus_print_child, acpi_print_child), 188 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 189 DEVMETHOD(bus_driver_added, acpi_driver_added), 190 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 191 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 192 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 193 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 194 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 195 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 196 DEVMETHOD(bus_release_resource, acpi_release_resource), 197 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 198 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 199 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 200 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 201 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 202 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 203 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 204 205 /* ACPI bus */ 206 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 207 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 208 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 209 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 210 211 /* PCI emulation */ 212 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 213 214 /* ISA emulation */ 215 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 216 217 DEVMETHOD_END 218 }; 219 220 static driver_t acpi_driver = { 221 "acpi", 222 acpi_methods, 223 sizeof(struct acpi_softc), 224 .gpri = KOBJ_GPRI_ACPI+2 225 }; 226 227 static devclass_t acpi_devclass; 228 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 229 MODULE_VERSION(acpi, 1); 230 231 ACPI_SERIAL_DECL(acpi, "ACPI serializer"); 232 233 /* Local pools for managing system resources for ACPI child devices. */ 234 static struct rman acpi_rman_io, acpi_rman_mem; 235 236 #define ACPI_MINIMUM_AWAKETIME 5 237 238 static const char* sleep_state_names[] = { 239 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 240 241 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 242 static char acpi_ca_version[12]; 243 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 244 acpi_ca_version, 0, "Version of Intel ACPICA"); 245 246 /* 247 * Allow overriding _OSI methods. 248 */ 249 static char acpi_install_interface[256]; 250 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface, 251 sizeof(acpi_install_interface)); 252 static char acpi_remove_interface[256]; 253 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface, 254 sizeof(acpi_remove_interface)); 255 256 /* 257 * Use this tunable to disable the control method auto-serialization 258 * mechanism that was added in 20140214 and superseded the previous 259 * AcpiGbl_SerializeAllMethods global. 260 */ 261 static int acpi_auto_serialize_methods = 1; 262 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 263 264 /* Allow users to dump Debug objects without ACPI debugger. */ 265 static int acpi_debug_objects; 266 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects); 267 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects, 268 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I", 269 "Enable Debug objects."); 270 271 /* Allow ignoring the XSDT. */ 272 static int acpi_ignore_xsdt; 273 TUNABLE_INT("debug.acpi.ignore_xsdt", &acpi_ignore_xsdt); 274 SYSCTL_INT(_debug_acpi, OID_AUTO, ignore_xsdt, CTLFLAG_RD, 275 &acpi_ignore_xsdt, 1, "Ignore the XSDT, forcing the use of the RSDT."); 276 277 /* Allow the interpreter to ignore common mistakes in BIOS. */ 278 static int acpi_interpreter_slack = 1; 279 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack); 280 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RD, 281 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode."); 282 283 /* Allow preferring 32-bit FADT register addresses over the 64-bit ones. */ 284 static int acpi_fadt_addr32; 285 TUNABLE_INT("debug.acpi.fadt_addr32", &acpi_fadt_addr32); 286 SYSCTL_INT(_debug_acpi, OID_AUTO, fadt_addr32, CTLFLAG_RD, 287 &acpi_fadt_addr32, 1, 288 "Prefer 32-bit FADT register addresses over 64-bit ones."); 289 290 /* Prefer 32-bit FACS table addresses over the 64-bit ones. */ 291 static int acpi_facs_addr32 = 1; 292 TUNABLE_INT("debug.acpi.facs_addr32", &acpi_facs_addr32); 293 SYSCTL_INT(_debug_acpi, OID_AUTO, facs_addr32, CTLFLAG_RD, 294 &acpi_facs_addr32, 1, 295 "Prefer 32-bit FACS table addresses over 64-bit ones."); 296 297 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 298 static int acpi_do_powerstate = 1; 299 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 300 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 301 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 302 303 /* Allow users to override quirks. */ 304 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 305 306 /* Allow to call ACPI methods from userland. */ 307 static int acpi_allow_mcall; 308 TUNABLE_INT("debug.acpi.allow_method_calls", &acpi_allow_mcall); 309 310 static int acpi_susp_bounce; 311 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 312 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 313 314 /* 315 * ACPI can only be loaded as a module by the loader; activating it after 316 * system bootstrap time is not useful, and can be fatal to the system. 317 * It also cannot be unloaded, since the entire system bus heirarchy hangs 318 * off it. 319 */ 320 static int 321 acpi_modevent(struct module *mod, int event, void *junk) 322 { 323 switch (event) { 324 case MOD_LOAD: 325 if (!cold) { 326 kprintf("The ACPI driver cannot be loaded after boot.\n"); 327 return (EPERM); 328 } 329 break; 330 case MOD_UNLOAD: 331 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 332 return (EBUSY); 333 break; 334 default: 335 break; 336 } 337 return (0); 338 } 339 340 /* 341 * Perform early initialization. 342 */ 343 ACPI_STATUS 344 acpi_Startup(void) 345 { 346 static int started = 0; 347 ACPI_STATUS status; 348 int val; 349 350 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 351 352 /* Only run the startup code once. The MADT driver also calls this. */ 353 if (started) 354 return_VALUE (AE_OK); 355 started = 1; 356 357 /* Start up the ACPICA subsystem. */ 358 status = AcpiInitializeSubsystem(); 359 if (ACPI_FAILURE(status)) { 360 kprintf("ACPI: Subsystem initialization failed: %s\n", 361 AcpiFormatException(status)); 362 return_VALUE (status); 363 } 364 365 /* 366 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 367 * if more tables exist. 368 */ 369 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 370 kprintf("ACPI: Table initialization failed: %s\n", 371 AcpiFormatException(status)); 372 return_VALUE (status); 373 } 374 375 /* Set up any quirks we have for this system. */ 376 if (acpi_quirks == ACPI_Q_OK) 377 acpi_table_quirks(&acpi_quirks); 378 379 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 380 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 381 acpi_quirks &= ~ACPI_Q_BROKEN; 382 if (acpi_quirks & ACPI_Q_BROKEN) { 383 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 384 status = AE_SUPPORT; 385 } 386 387 return_VALUE (status); 388 } 389 390 /* 391 * Detect ACPI, perform early initialisation 392 */ 393 static void 394 acpi_identify(driver_t *driver, device_t parent) 395 { 396 device_t child; 397 398 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 399 400 if (!cold) 401 return_VOID; 402 403 /* Check that we haven't been disabled with a hint. */ 404 if (resource_disabled("acpi", 0)) 405 return_VOID; 406 407 /* Make sure we're not being doubly invoked. */ 408 if (device_find_child(parent, "acpi", 0) != NULL) 409 return_VOID; 410 411 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 412 413 /* Initialize root tables. */ 414 if (ACPI_FAILURE(acpi_Startup())) { 415 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 416 return_VOID; 417 } 418 419 /* Attach the actual ACPI device. */ 420 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 421 device_printf(parent, "device_identify failed\n"); 422 return_VOID; 423 } 424 } 425 426 /* 427 * Fetch some descriptive data from ACPI to put in our attach message. 428 */ 429 static int 430 acpi_probe(device_t dev) 431 { 432 ACPI_TABLE_RSDP *rsdp; 433 ACPI_TABLE_HEADER *rsdt; 434 ACPI_PHYSICAL_ADDRESS paddr; 435 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 436 struct sbuf sb; 437 438 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 439 440 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 441 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 442 device_printf(dev, "probe failed, other PM system enabled.\n"); 443 return_VALUE (ENXIO); 444 } 445 446 if ((paddr = AcpiOsGetRootPointer()) == 0 || 447 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 448 return_VALUE (ENXIO); 449 if (acpi_ignore_xsdt == 0 && 450 rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 451 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 452 else 453 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 454 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 455 456 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 457 return_VALUE (ENXIO); 458 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 459 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 460 sbuf_trim(&sb); 461 sbuf_putc(&sb, ' '); 462 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 463 sbuf_trim(&sb); 464 sbuf_finish(&sb); 465 device_set_desc_copy(dev, sbuf_data(&sb)); 466 sbuf_delete(&sb); 467 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 468 469 return_VALUE (0); 470 } 471 472 static int 473 acpi_attach(device_t dev) 474 { 475 struct acpi_softc *sc; 476 ACPI_STATUS status; 477 int error, state; 478 UINT32 flags; 479 UINT8 TypeA, TypeB; 480 char *env; 481 482 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 483 484 sc = device_get_softc(dev); 485 sc->acpi_dev = dev; 486 callout_init(&sc->susp_force_to); 487 488 if ((error = acpi_task_thread_init())) { 489 device_printf(dev, "Could not start task thread.\n"); 490 goto out2; 491 } 492 493 error = ENXIO; 494 495 /* Initialize resource manager. */ 496 acpi_rman_io.rm_type = RMAN_ARRAY; 497 acpi_rman_io.rm_start = 0; 498 acpi_rman_io.rm_end = 0xffff; 499 acpi_rman_io.rm_descr = "ACPI I/O ports"; 500 if (rman_init(&acpi_rman_io, -1) != 0) 501 panic("acpi rman_init IO ports failed"); 502 acpi_rman_mem.rm_type = RMAN_ARRAY; 503 acpi_rman_mem.rm_start = 0; 504 acpi_rman_mem.rm_end = ~0ul; 505 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 506 if (rman_init(&acpi_rman_mem, -1) != 0) 507 panic("acpi rman_init memory failed"); 508 509 /* Initialise the ACPI mutex */ 510 ACPI_LOCK_INIT(acpi, "acpi"); 511 ACPI_SERIAL_INIT(acpi); 512 513 ACPI_LOCK(acpi); 514 515 /* 516 * Set the globals from our tunables. This is needed because ACPICA 517 * uses UINT8 for some values and we have no tunable_byte. 518 */ 519 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods ? TRUE : FALSE; 520 AcpiGbl_DoNotUseXsdt = acpi_ignore_xsdt ? TRUE : FALSE; 521 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 522 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE; 523 AcpiGbl_Use32BitFadtAddresses = acpi_fadt_addr32 ? TRUE : FALSE; 524 AcpiGbl_Use32BitFacsAddresses = acpi_facs_addr32 ? TRUE : FALSE; 525 526 #ifndef ACPI_DEBUG 527 /* 528 * Disable Debug Object output. 529 */ 530 AcpiDbgLevel &= ~ACPI_LV_DEBUG_OBJECT; 531 #endif 532 533 /* Override OS interfaces if the user requested. */ 534 acpi_reset_interfaces(dev); 535 536 /* Load ACPI name space. */ 537 status = AcpiLoadTables(); 538 if (ACPI_FAILURE(status)) { 539 device_printf(dev, "Could not load Namespace: %s\n", 540 AcpiFormatException(status)); 541 goto out; 542 } 543 544 /* Handle MCFG table if present. */ 545 acpi_enable_pcie(); 546 547 /* 548 * Note that some systems (specifically, those with namespace evaluation 549 * issues that require the avoidance of parts of the namespace) must 550 * avoid running _INI and _STA on everything, as well as dodging the final 551 * object init pass. 552 * 553 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 554 * 555 * XXX We should arrange for the object init pass after we have attached 556 * all our child devices, but on many systems it works here. 557 */ 558 flags = ACPI_FULL_INITIALIZATION; 559 if (ktestenv("debug.acpi.avoid")) 560 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 561 562 /* Bring the hardware and basic handlers online. */ 563 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 564 device_printf(dev, "Could not enable ACPI: %s\n", 565 AcpiFormatException(status)); 566 goto out; 567 } 568 569 /* 570 * Fix up the interrupt timer after enabling ACPI, so that the 571 * interrupt cputimer that choked by ACPI power management could 572 * be resurrected before probing various devices. 573 */ 574 DELAY(5000); 575 cputimer_intr_pmfixup(); 576 577 /* 578 * Call the ECDT probe function to provide EC functionality before 579 * the namespace has been evaluated. 580 * 581 * XXX This happens before the sysresource devices have been probed and 582 * attached so its resources come from nexus0. In practice, this isn't 583 * a problem but should be addressed eventually. 584 */ 585 acpi_ec_ecdt_probe(dev); 586 587 /* Bring device objects and regions online. */ 588 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 589 device_printf(dev, "Could not initialize ACPI objects: %s\n", 590 AcpiFormatException(status)); 591 goto out; 592 } 593 594 /* 595 * Setup our sysctl tree. 596 * 597 * XXX: This doesn't check to make sure that none of these fail. 598 */ 599 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 600 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 601 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 602 device_get_name(dev), CTLFLAG_RD, 0, ""); 603 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 604 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 605 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 606 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 607 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 608 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 609 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 610 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 611 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 612 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 613 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 614 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 615 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 616 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 617 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 618 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 619 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 620 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 621 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 622 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 623 "sleep delay"); 624 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 625 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 626 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 627 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 628 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 629 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 630 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 631 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 632 OID_AUTO, "handle_reboot", CTLFLAG_RW, 633 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 634 635 /* 636 * Default to 1 second before sleeping to give some machines time to 637 * stabilize. 638 */ 639 sc->acpi_sleep_delay = 1; 640 if (bootverbose) 641 sc->acpi_verbose = 1; 642 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 643 if (strcmp(env, "0") != 0) 644 sc->acpi_verbose = 1; 645 kfreeenv(env); 646 } 647 648 /* Only enable reboot by default if the FADT says it is available. */ 649 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 650 sc->acpi_handle_reboot = 1; 651 652 /* Only enable S4BIOS by default if the FACS says it is available. */ 653 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 654 sc->acpi_s4bios = 1; 655 656 /* 657 * Dispatch the default sleep state to devices. The lid switch is set 658 * to NONE by default to avoid surprising users. 659 */ 660 sc->acpi_power_button_sx = ACPI_STATE_S5; 661 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 662 sc->acpi_standby_sx = ACPI_STATE_S1; 663 sc->acpi_suspend_sx = ACPI_STATE_S3; 664 665 /* Pick the first valid sleep state for the sleep button default. */ 666 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 667 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 668 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 669 sc->acpi_sleep_button_sx = state; 670 break; 671 } 672 673 acpi_enable_fixed_events(sc); 674 675 /* 676 * Scan the namespace and attach/initialise children. 677 */ 678 679 /* Register our shutdown handler. */ 680 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 681 SHUTDOWN_PRI_LAST); 682 683 /* 684 * Register our acpi event handlers. 685 * XXX should be configurable eg. via userland policy manager. 686 */ 687 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 688 sc, ACPI_EVENT_PRI_LAST); 689 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 690 sc, ACPI_EVENT_PRI_LAST); 691 692 /* Flag our initial states. */ 693 sc->acpi_enabled = 1; 694 sc->acpi_sstate = ACPI_STATE_S0; 695 sc->acpi_sleep_disabled = 0; 696 /* Create the control device */ 697 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, "acpi"); 698 sc->acpi_dev_t->si_drv1 = sc; 699 700 if ((error = acpi_machdep_init(dev))) 701 goto out; 702 703 /* Register ACPI again to pass the correct argument of pm_func. */ 704 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 705 706 if (!acpi_disabled("bus")) 707 acpi_probe_children(dev); 708 709 /* Update all GPEs and enable runtime GPEs. */ 710 status = AcpiUpdateAllGpes(); 711 if (ACPI_FAILURE(status)) { 712 device_printf(dev, "Could not update all GPEs: %s\n", 713 AcpiFormatException(status)); 714 } 715 716 /* Allow sleep request after a while. */ 717 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 718 719 error = 0; 720 721 out: 722 ACPI_UNLOCK(acpi); 723 out2: 724 cputimer_intr_pmfixup(); 725 acpi_task_thread_schedule(); 726 727 return_VALUE (error); 728 } 729 730 static int 731 acpi_suspend(device_t dev) 732 { 733 device_t child, *devlist; 734 int error, i, numdevs, pstate; 735 736 /* First give child devices a chance to suspend. */ 737 error = bus_generic_suspend(dev); 738 if (error) 739 return (error); 740 741 /* 742 * Now, set them into the appropriate power state, usually D3. If the 743 * device has an _SxD method for the next sleep state, use that power 744 * state instead. 745 */ 746 device_get_children(dev, &devlist, &numdevs); 747 for (i = 0; i < numdevs; i++) { 748 /* If the device is not attached, we've powered it down elsewhere. */ 749 child = devlist[i]; 750 if (!device_is_attached(child)) 751 continue; 752 753 /* 754 * Default to D3 for all sleep states. The _SxD method is optional 755 * so set the powerstate even if it's absent. 756 */ 757 pstate = PCI_POWERSTATE_D3; 758 error = acpi_device_pwr_for_sleep(device_get_parent(child), 759 child, &pstate); 760 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 761 pci_set_powerstate(child, pstate); 762 } 763 kfree(devlist, M_TEMP); 764 error = 0; 765 766 return (error); 767 } 768 769 static int 770 acpi_resume(device_t dev) 771 { 772 ACPI_HANDLE handle; 773 int i, numdevs; 774 device_t child, *devlist; 775 776 /* 777 * Put all devices in D0 before resuming them. Call _S0D on each one 778 * since some systems expect this. 779 */ 780 device_get_children(dev, &devlist, &numdevs); 781 for (i = 0; i < numdevs; i++) { 782 child = devlist[i]; 783 handle = acpi_get_handle(child); 784 if (handle) 785 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 786 if (device_is_attached(child) && acpi_do_powerstate) 787 pci_set_powerstate(child, PCI_POWERSTATE_D0); 788 } 789 kfree(devlist, M_TEMP); 790 791 return (bus_generic_resume(dev)); 792 } 793 794 static int 795 acpi_shutdown(device_t dev) 796 { 797 /* Allow children to shutdown first. */ 798 bus_generic_shutdown(dev); 799 800 /* 801 * Enable any GPEs that are able to power-on the system (i.e., RTC). 802 * Also, disable any that are not valid for this state (most). 803 */ 804 acpi_wake_prep_walk(ACPI_STATE_S5); 805 806 return (0); 807 } 808 809 /* 810 * Handle a new device being added 811 */ 812 static device_t 813 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 814 { 815 struct acpi_device *ad; 816 device_t child; 817 818 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 819 return (NULL); 820 821 resource_list_init(&ad->ad_rl); 822 child = device_add_child_ordered(parent, order, name, unit); 823 if (child != NULL) 824 device_set_ivars(child, ad); 825 else 826 kfree(ad, M_ACPIDEV); 827 return (child); 828 } 829 830 static int 831 acpi_print_child(device_t bus, device_t child) 832 { 833 struct acpi_device *adev = device_get_ivars(child); 834 struct resource_list *rl = &adev->ad_rl; 835 int retval = 0; 836 837 retval += bus_print_child_header(bus, child); 838 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 839 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 840 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 841 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 842 if (device_get_flags(child)) 843 retval += kprintf(" flags %#x", device_get_flags(child)); 844 retval += bus_print_child_footer(bus, child); 845 846 return (retval); 847 } 848 849 /* 850 * If this device is an ACPI child but no one claimed it, attempt 851 * to power it off. We'll power it back up when a driver is added. 852 * 853 * XXX Disabled for now since many necessary devices (like fdc and 854 * ATA) don't claim the devices we created for them but still expect 855 * them to be powered up. 856 */ 857 static void 858 acpi_probe_nomatch(device_t bus, device_t child) 859 { 860 861 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 862 } 863 864 /* 865 * If a new driver has a chance to probe a child, first power it up. 866 * 867 * XXX Disabled for now (see acpi_probe_nomatch for details). 868 */ 869 static void 870 acpi_driver_added(device_t dev, driver_t *driver) 871 { 872 device_t child, *devlist; 873 int i, numdevs; 874 875 DEVICE_IDENTIFY(driver, dev); 876 device_get_children(dev, &devlist, &numdevs); 877 for (i = 0; i < numdevs; i++) { 878 child = devlist[i]; 879 if (device_get_state(child) == DS_NOTPRESENT) { 880 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 881 if (device_probe_and_attach(child) != 0) { 882 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 883 } 884 } 885 } 886 kfree(devlist, M_TEMP); 887 } 888 889 /* Location hint for devctl(8) */ 890 static int 891 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 892 size_t buflen) 893 { 894 struct acpi_device *dinfo = device_get_ivars(child); 895 896 if (dinfo->ad_handle) 897 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 898 else 899 ksnprintf(buf, buflen, "unknown"); 900 return (0); 901 } 902 903 /* PnP information for devctl(8) */ 904 static int 905 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 906 size_t buflen) 907 { 908 ACPI_DEVICE_INFO *adinfo; 909 struct acpi_device *dinfo = device_get_ivars(child); 910 911 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) { 912 ksnprintf(buf, buflen, "unknown"); 913 } else { 914 ksnprintf(buf, buflen, "_HID=%s _UID=%s", 915 (adinfo->Valid & ACPI_VALID_HID) ? 916 adinfo->HardwareId.String : "none", 917 (adinfo->Valid & ACPI_VALID_UID) ? 918 adinfo->UniqueId.String : "0"); 919 AcpiOsFree(adinfo); 920 } 921 return (0); 922 } 923 924 /* 925 * Handle per-device ivars 926 */ 927 static int 928 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 929 { 930 struct acpi_device *ad; 931 932 if ((ad = device_get_ivars(child)) == NULL) { 933 device_printf(child, "device has no ivars\n"); 934 return (ENOENT); 935 } 936 937 /* ACPI and ISA compatibility ivars */ 938 switch(index) { 939 case ACPI_IVAR_HANDLE: 940 *(ACPI_HANDLE *)result = ad->ad_handle; 941 break; 942 case ACPI_IVAR_MAGIC: 943 *result = ad->ad_magic; 944 break; 945 case ACPI_IVAR_PRIVATE: 946 *(void **)result = ad->ad_private; 947 break; 948 case ACPI_IVAR_FLAGS: 949 *(int *)result = ad->ad_flags; 950 break; 951 case ACPI_IVAR_RECHECK: 952 *(int *)result = ad->ad_recheck; 953 break; 954 case ISA_IVAR_VENDORID: 955 case ISA_IVAR_SERIAL: 956 case ISA_IVAR_COMPATID: 957 *(int *)result = -1; 958 break; 959 case ISA_IVAR_LOGICALID: 960 *(int *)result = acpi_isa_get_logicalid(child); 961 break; 962 default: 963 return (ENOENT); 964 } 965 966 return (0); 967 } 968 969 static int 970 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 971 { 972 struct acpi_device *ad; 973 974 if ((ad = device_get_ivars(child)) == NULL) { 975 device_printf(child, "device has no ivars\n"); 976 return (ENOENT); 977 } 978 979 switch(index) { 980 case ACPI_IVAR_HANDLE: 981 ad->ad_handle = (ACPI_HANDLE)value; 982 break; 983 case ACPI_IVAR_MAGIC: 984 ad->ad_magic = value; 985 break; 986 case ACPI_IVAR_PRIVATE: 987 ad->ad_private = (void *)value; 988 break; 989 case ACPI_IVAR_FLAGS: 990 ad->ad_flags = (int)value; 991 break; 992 case ACPI_IVAR_RECHECK: 993 ad->ad_recheck = (int)value; 994 break; 995 default: 996 panic("bad ivar write request (%d)", index); 997 return (ENOENT); 998 } 999 1000 return (0); 1001 } 1002 1003 /* 1004 * Handle child resource allocation/removal 1005 */ 1006 static struct resource_list * 1007 acpi_get_rlist(device_t dev, device_t child) 1008 { 1009 struct acpi_device *ad; 1010 1011 ad = device_get_ivars(child); 1012 return (&ad->ad_rl); 1013 } 1014 1015 /* 1016 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1017 * duplicates, we merge any in the sysresource attach routine. 1018 */ 1019 static int 1020 acpi_sysres_alloc(device_t dev) 1021 { 1022 struct resource *res; 1023 struct resource_list *rl; 1024 struct resource_list_entry *rle; 1025 struct rman *rm; 1026 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1027 device_t *children; 1028 int child_count, i; 1029 /* 1030 * Probe/attach any sysresource devices. This would be unnecessary if we 1031 * had multi-pass probe/attach. 1032 */ 1033 if (device_get_children(dev, &children, &child_count) != 0) 1034 return (ENXIO); 1035 for (i = 0; i < child_count; i++) { 1036 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1037 device_probe_and_attach(children[i]); 1038 } 1039 kfree(children, M_TEMP); 1040 1041 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1042 if(!rl) 1043 return 0; 1044 SLIST_FOREACH(rle, rl, link) { 1045 if (rle->res != NULL) { 1046 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1047 continue; 1048 } 1049 1050 /* Only memory and IO resources are valid here. */ 1051 switch (rle->type) { 1052 case SYS_RES_IOPORT: 1053 rm = &acpi_rman_io; 1054 break; 1055 case SYS_RES_MEMORY: 1056 rm = &acpi_rman_mem; 1057 break; 1058 default: 1059 continue; 1060 } 1061 1062 /* Pre-allocate resource and add to our rman pool. */ 1063 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1064 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1065 0, -1); 1066 if (res != NULL) { 1067 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1068 rle->res = res; 1069 } else 1070 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1071 rle->start, rle->count, rle->type); 1072 } 1073 return (0); 1074 } 1075 1076 static struct resource * 1077 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1078 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1079 { 1080 ACPI_RESOURCE ares; 1081 struct acpi_device *ad = device_get_ivars(child); 1082 struct resource_list *rl = &ad->ad_rl; 1083 struct resource_list_entry *rle; 1084 struct resource *res; 1085 struct rman *rm; 1086 1087 res = NULL; 1088 1089 /* We only handle memory and IO resources through rman. */ 1090 switch (type) { 1091 case SYS_RES_IOPORT: 1092 rm = &acpi_rman_io; 1093 break; 1094 case SYS_RES_MEMORY: 1095 rm = &acpi_rman_mem; 1096 break; 1097 default: 1098 rm = NULL; 1099 } 1100 1101 ACPI_SERIAL_BEGIN(acpi); 1102 1103 /* 1104 * If this is an allocation of the "default" range for a given RID, and 1105 * we know what the resources for this device are (i.e., they're on the 1106 * child's resource list), use those start/end values. 1107 */ 1108 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1109 rle = resource_list_find(rl, type, *rid); 1110 if (rle == NULL) 1111 goto out; 1112 start = rle->start; 1113 end = rle->end; 1114 count = rle->count; 1115 cpuid = rle->cpuid; 1116 } 1117 1118 /* 1119 * If this is an allocation of a specific range, see if we can satisfy 1120 * the request from our system resource regions. If we can't, pass the 1121 * request up to the parent. 1122 */ 1123 if (start + count - 1 == end && rm != NULL) 1124 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1125 child); 1126 if (res == NULL) { 1127 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1128 start, end, count, flags, cpuid); 1129 } else { 1130 rman_set_rid(res, *rid); 1131 1132 /* If requested, activate the resource using the parent's method. */ 1133 if (flags & RF_ACTIVE) 1134 if (bus_activate_resource(child, type, *rid, res) != 0) { 1135 rman_release_resource(res); 1136 res = NULL; 1137 goto out; 1138 } 1139 } 1140 1141 if (res != NULL && device_get_parent(child) == bus) 1142 switch (type) { 1143 case SYS_RES_IRQ: 1144 /* 1145 * Since bus_config_intr() takes immediate effect, we cannot 1146 * configure the interrupt associated with a device when we 1147 * parse the resources but have to defer it until a driver 1148 * actually allocates the interrupt via bus_alloc_resource(). 1149 * 1150 * NB: Lookup failure is fine, since the device may add its 1151 * own interrupt resources, e.g. MSI or MSI-X. 1152 */ 1153 if (ACPI_SUCCESS( 1154 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1155 acpi_config_intr(child, &ares); 1156 } else { 1157 kprintf("irq resource not found\n"); 1158 } 1159 break; 1160 } 1161 1162 out: 1163 ACPI_SERIAL_END(acpi); 1164 return (res); 1165 } 1166 1167 static int 1168 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1169 struct resource *r) 1170 { 1171 struct rman *rm; 1172 int ret; 1173 1174 /* We only handle memory and IO resources through rman. */ 1175 switch (type) { 1176 case SYS_RES_IOPORT: 1177 rm = &acpi_rman_io; 1178 break; 1179 case SYS_RES_MEMORY: 1180 rm = &acpi_rman_mem; 1181 break; 1182 default: 1183 rm = NULL; 1184 } 1185 1186 ACPI_SERIAL_BEGIN(acpi); 1187 1188 /* 1189 * If this resource belongs to one of our internal managers, 1190 * deactivate it and release it to the local pool. If it doesn't, 1191 * pass this request up to the parent. 1192 */ 1193 if (rm != NULL && rman_is_region_manager(r, rm)) { 1194 if (rman_get_flags(r) & RF_ACTIVE) { 1195 ret = bus_deactivate_resource(child, type, rid, r); 1196 if (ret != 0) 1197 goto out; 1198 } 1199 ret = rman_release_resource(r); 1200 } else 1201 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1202 1203 out: 1204 ACPI_SERIAL_END(acpi); 1205 return (ret); 1206 } 1207 1208 static void 1209 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1210 { 1211 struct resource_list *rl; 1212 1213 rl = acpi_get_rlist(bus, child); 1214 resource_list_delete(rl, type, rid); 1215 } 1216 1217 /* Allocate an IO port or memory resource, given its GAS. */ 1218 int 1219 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1220 struct resource **res, u_int flags) 1221 { 1222 int error, res_type; 1223 1224 error = ENOMEM; 1225 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1226 return (EINVAL); 1227 1228 /* We only support memory and IO spaces. */ 1229 switch (gas->SpaceId) { 1230 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1231 res_type = SYS_RES_MEMORY; 1232 break; 1233 case ACPI_ADR_SPACE_SYSTEM_IO: 1234 res_type = SYS_RES_IOPORT; 1235 break; 1236 default: 1237 return (EOPNOTSUPP); 1238 } 1239 1240 /* 1241 * If the register width is less than 8, assume the BIOS author means 1242 * it is a bit field and just allocate a byte. 1243 */ 1244 if (gas->BitWidth && gas->BitWidth < 8) 1245 gas->BitWidth = 8; 1246 1247 /* Validate the address after we're sure we support the space. */ 1248 if (gas->Address == 0 || gas->BitWidth == 0) 1249 return (EINVAL); 1250 1251 bus_set_resource(dev, res_type, *rid, gas->Address, 1252 gas->BitWidth / 8, -1); 1253 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1254 if (*res != NULL) { 1255 *type = res_type; 1256 error = 0; 1257 } else 1258 bus_delete_resource(dev, res_type, *rid); 1259 1260 return (error); 1261 } 1262 1263 ACPI_STATUS 1264 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1265 int revision, uint32_t *buf, int count) 1266 { 1267 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1268 ACPI_OBJECT_LIST arglist; 1269 ACPI_OBJECT arg[4]; 1270 ACPI_OBJECT *retobj; 1271 ACPI_STATUS status; 1272 struct uuid uuid; 1273 uint32_t error; 1274 uint8_t oscuuid[ACPI_UUID_LENGTH]; 1275 int i; 1276 1277 if (parse_uuid(uuidstr, &uuid) != 0) 1278 return (AE_ERROR); 1279 le_uuid_enc(oscuuid, &uuid); 1280 1281 arglist.Pointer = arg; 1282 arglist.Count = 4; 1283 arg[0].Type = ACPI_TYPE_BUFFER; 1284 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 1285 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1286 arg[1].Type = ACPI_TYPE_INTEGER; 1287 arg[1].Integer.Value = revision; /* revision */ 1288 arg[2].Type = ACPI_TYPE_INTEGER; 1289 arg[2].Integer.Value = count; /* # of cap integers */ 1290 arg[3].Type = ACPI_TYPE_BUFFER; 1291 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1292 arg[3].Buffer.Pointer = (uint8_t *)buf; 1293 1294 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1295 if (ACPI_FAILURE(status)) 1296 goto done; 1297 retobj = retbuf.Pointer; 1298 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSC_ERRMASK; 1299 if (error == 0) 1300 goto done; 1301 status = AE_ERROR; 1302 if (error & ACPI_OSCERR_FAILURE) 1303 device_printf(dev, "_OSC unable to process request\n"); 1304 if (error & ACPI_OSCERR_BADUUID) 1305 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1306 if (error & ACPI_OSCERR_BADREV) 1307 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1308 if (error & ACPI_OSCERR_CAPSMASKED) { 1309 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1310 for (i = 1; i < count; i++) { 1311 device_printf(dev, 1312 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1313 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1314 } 1315 status = AE_SUPPORT; 1316 } else { 1317 status = AE_OK; 1318 } 1319 } 1320 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) { 1321 for (i = 0; i < count; i++) 1322 buf[i] = ((uint32_t *)retobj->Buffer.Pointer)[i]; 1323 } 1324 1325 done: 1326 if (retbuf.Pointer != NULL) 1327 AcpiOsFree(retbuf.Pointer); 1328 return (status); 1329 } 1330 1331 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1332 static uint32_t 1333 acpi_isa_get_logicalid(device_t dev) 1334 { 1335 ACPI_DEVICE_INFO *devinfo; 1336 ACPI_HANDLE h; 1337 uint32_t pnpid; 1338 1339 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1340 1341 devinfo = NULL; 1342 pnpid = 0; 1343 1344 /* Fetch and validate the HID. */ 1345 if ((h = acpi_get_handle(dev)) == NULL || 1346 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1347 goto out; 1348 1349 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1350 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1351 1352 out: 1353 if (devinfo) 1354 AcpiOsFree(devinfo); 1355 return_VALUE (pnpid); 1356 } 1357 1358 static int 1359 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1360 { 1361 ACPI_DEVICE_INFO *devinfo; 1362 ACPI_HANDLE h; 1363 uint32_t *pnpid; 1364 int valid, i; 1365 1366 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1367 1368 devinfo = NULL; 1369 pnpid = cids; 1370 valid = 0; 1371 1372 /* Fetch and validate the CID */ 1373 if ((h = acpi_get_handle(dev)) == NULL || 1374 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1375 (devinfo->Valid & ACPI_VALID_CID) == 0) 1376 goto out; 1377 1378 if (devinfo->CompatibleIdList.Count < count) 1379 count = devinfo->CompatibleIdList.Count; 1380 for (i = 0; i < count; i++) { 1381 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1382 continue; 1383 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1384 valid++; 1385 } 1386 1387 out: 1388 if (devinfo) 1389 AcpiOsFree(devinfo); 1390 return_VALUE (valid); 1391 } 1392 1393 static char * 1394 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1395 { 1396 ACPI_HANDLE h; 1397 int i; 1398 1399 h = acpi_get_handle(dev); 1400 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1401 return (NULL); 1402 1403 /* Try to match one of the array of IDs with a HID or CID. */ 1404 for (i = 0; ids[i] != NULL; i++) { 1405 if (acpi_MatchHid(h, ids[i])) 1406 return (ids[i]); 1407 } 1408 return (NULL); 1409 } 1410 1411 static ACPI_STATUS 1412 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1413 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1414 { 1415 ACPI_HANDLE h; 1416 1417 if (dev == NULL) 1418 h = ACPI_ROOT_OBJECT; 1419 else if ((h = acpi_get_handle(dev)) == NULL) 1420 return (AE_BAD_PARAMETER); 1421 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1422 } 1423 1424 static int 1425 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1426 { 1427 struct acpi_softc *sc; 1428 ACPI_HANDLE handle; 1429 ACPI_STATUS status; 1430 char sxd[8]; 1431 int error; 1432 1433 sc = device_get_softc(bus); 1434 handle = acpi_get_handle(dev); 1435 1436 /* 1437 * XXX If we find these devices, don't try to power them down. 1438 * The serial and IRDA ports on my T23 hang the system when 1439 * set to D3 and it appears that such legacy devices may 1440 * need special handling in their drivers. 1441 */ 1442 if (handle == NULL || 1443 acpi_MatchHid(handle, "PNP0500") || 1444 acpi_MatchHid(handle, "PNP0501") || 1445 acpi_MatchHid(handle, "PNP0502") || 1446 acpi_MatchHid(handle, "PNP0510") || 1447 acpi_MatchHid(handle, "PNP0511")) 1448 return (ENXIO); 1449 1450 /* 1451 * Override next state with the value from _SxD, if present. If no 1452 * dstate argument was provided, don't fetch the return value. 1453 */ 1454 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1455 if (dstate) 1456 status = acpi_GetInteger(handle, sxd, dstate); 1457 else 1458 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1459 1460 switch (status) { 1461 case AE_OK: 1462 error = 0; 1463 break; 1464 case AE_NOT_FOUND: 1465 error = ESRCH; 1466 break; 1467 default: 1468 error = ENXIO; 1469 break; 1470 } 1471 1472 return (error); 1473 } 1474 1475 /* Callback arg for our implementation of walking the namespace. */ 1476 struct acpi_device_scan_ctx { 1477 acpi_scan_cb_t user_fn; 1478 void *arg; 1479 ACPI_HANDLE parent; 1480 }; 1481 1482 static ACPI_STATUS 1483 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1484 { 1485 struct acpi_device_scan_ctx *ctx; 1486 device_t dev, old_dev; 1487 ACPI_STATUS status; 1488 ACPI_OBJECT_TYPE type; 1489 1490 /* 1491 * Skip this device if we think we'll have trouble with it or it is 1492 * the parent where the scan began. 1493 */ 1494 ctx = (struct acpi_device_scan_ctx *)arg; 1495 if (acpi_avoid(h) || h == ctx->parent) 1496 return (AE_OK); 1497 1498 /* If this is not a valid device type (e.g., a method), skip it. */ 1499 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1500 return (AE_OK); 1501 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1502 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1503 return (AE_OK); 1504 1505 /* 1506 * Call the user function with the current device. If it is unchanged 1507 * afterwards, return. Otherwise, we update the handle to the new dev. 1508 */ 1509 old_dev = acpi_get_device(h); 1510 dev = old_dev; 1511 status = ctx->user_fn(h, &dev, level, ctx->arg); 1512 if (ACPI_FAILURE(status) || old_dev == dev) 1513 return (status); 1514 1515 /* Remove the old child and its connection to the handle. */ 1516 if (old_dev != NULL) { 1517 device_delete_child(device_get_parent(old_dev), old_dev); 1518 AcpiDetachData(h, acpi_fake_objhandler); 1519 } 1520 1521 /* Recreate the handle association if the user created a device. */ 1522 if (dev != NULL) 1523 AcpiAttachData(h, acpi_fake_objhandler, dev); 1524 1525 return (AE_OK); 1526 } 1527 1528 static ACPI_STATUS 1529 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1530 acpi_scan_cb_t user_fn, void *arg) 1531 { 1532 ACPI_HANDLE h; 1533 struct acpi_device_scan_ctx ctx; 1534 1535 if (acpi_disabled("children")) 1536 return (AE_OK); 1537 1538 if (dev == NULL) 1539 h = ACPI_ROOT_OBJECT; 1540 else if ((h = acpi_get_handle(dev)) == NULL) 1541 return (AE_BAD_PARAMETER); 1542 ctx.user_fn = user_fn; 1543 ctx.arg = arg; 1544 ctx.parent = h; 1545 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1546 acpi_device_scan_cb, NULL, &ctx, NULL)); 1547 } 1548 1549 /* 1550 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1551 * device power states since it's close enough to ACPI. 1552 */ 1553 static int 1554 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1555 { 1556 ACPI_HANDLE h; 1557 ACPI_STATUS status; 1558 int error; 1559 1560 error = 0; 1561 h = acpi_get_handle(child); 1562 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1563 return (EINVAL); 1564 if (h == NULL) 1565 return (0); 1566 1567 /* Ignore errors if the power methods aren't present. */ 1568 status = acpi_pwr_switch_consumer(h, state); 1569 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1570 && status != AE_BAD_PARAMETER) 1571 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1572 state, acpi_name(h), AcpiFormatException(status)); 1573 1574 return (error); 1575 } 1576 1577 static int 1578 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1579 { 1580 int result, cid_count, i; 1581 uint32_t lid, cids[8]; 1582 1583 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1584 1585 /* 1586 * ISA-style drivers attached to ACPI may persist and 1587 * probe manually if we return ENOENT. We never want 1588 * that to happen, so don't ever return it. 1589 */ 1590 result = ENXIO; 1591 1592 /* Scan the supplied IDs for a match */ 1593 lid = acpi_isa_get_logicalid(child); 1594 cid_count = acpi_isa_get_compatid(child, cids, 8); 1595 while (ids && ids->ip_id) { 1596 if (lid == ids->ip_id) { 1597 result = 0; 1598 goto out; 1599 } 1600 for (i = 0; i < cid_count; i++) { 1601 if (cids[i] == ids->ip_id) { 1602 result = 0; 1603 goto out; 1604 } 1605 } 1606 ids++; 1607 } 1608 1609 out: 1610 if (result == 0 && ids->ip_desc) 1611 device_set_desc(child, ids->ip_desc); 1612 1613 return_VALUE (result); 1614 } 1615 1616 /* 1617 * Look for a MCFG table. If it is present, use the settings for 1618 * domain (segment) 0 to setup PCI config space access via the memory 1619 * map. 1620 */ 1621 static void 1622 acpi_enable_pcie(void) 1623 { 1624 ACPI_TABLE_HEADER *hdr; 1625 ACPI_MCFG_ALLOCATION *alloc, *end; 1626 ACPI_STATUS status; 1627 1628 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1629 if (ACPI_FAILURE(status)) 1630 return; 1631 1632 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1633 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1634 while (alloc < end) { 1635 if (alloc->PciSegment == 0) { 1636 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1637 alloc->EndBusNumber); 1638 return; 1639 } 1640 alloc++; 1641 } 1642 } 1643 1644 /* 1645 * Scan all of the ACPI namespace and attach child devices. 1646 * 1647 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1648 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1649 * However, in violation of the spec, some systems place their PCI link 1650 * devices in \, so we have to walk the whole namespace. We check the 1651 * type of namespace nodes, so this should be ok. 1652 */ 1653 static void 1654 acpi_probe_children(device_t bus) 1655 { 1656 device_t *children; 1657 int cnt; 1658 1659 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1660 1661 /* 1662 * Scan the namespace and insert placeholders for all the devices that 1663 * we find. We also probe/attach any early devices. 1664 * 1665 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1666 * we want to create nodes for all devices, not just those that are 1667 * currently present. (This assumes that we don't want to create/remove 1668 * devices as they appear, which might be smarter.) 1669 */ 1670 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1671 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1672 acpi_probe_child, NULL, bus, NULL); 1673 /* This gets us all the children that we added from the ACPI namespace. */ 1674 device_get_children(bus, &children, &cnt); 1675 1676 /* Pre-allocate resources for our rman from any sysresource devices. */ 1677 acpi_sysres_alloc(bus); 1678 /* Create any static children by calling device identify methods. */ 1679 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1680 bus_generic_probe(bus); 1681 1682 /* Probe/attach all children, created staticly and from the namespace. */ 1683 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1684 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+2); 1685 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1686 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+1); 1687 /* Re-check device presence for previously disabled devices. */ 1688 acpi_reprobe_children(bus, children, cnt); 1689 kfree(children, M_TEMP); 1690 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "third bus_generic_attach\n")); 1691 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1692 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fourth bus_generic_attach\n")); 1693 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1694 1695 /* 1696 * Some of these children may have attached others as part of their attach 1697 * process (eg. the root PCI bus driver), so rescan. 1698 */ 1699 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fifth bus_generic_attach\n")); 1700 bus_generic_attach(bus); 1701 1702 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "sixth bus_generic_attach\n")); 1703 bus_generic_attach(bus); 1704 1705 /* Attach wake sysctls. */ 1706 acpi_wake_sysctl_walk(bus); 1707 1708 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1709 return_VOID; 1710 } 1711 1712 /* 1713 * Determine the probe order for a given device. 1714 */ 1715 static void 1716 acpi_probe_order(ACPI_HANDLE handle, int *order) 1717 { 1718 ACPI_OBJECT_TYPE type; 1719 1720 /* 1721 * 1. I/O port and memory system resource holders 1722 * 2. Embedded controllers (to handle early accesses) 1723 * 3. PCI Link Devices 1724 * 100000. CPUs 1725 */ 1726 AcpiGetType(handle, &type); 1727 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1728 *order = 1; 1729 else if (acpi_MatchHid(handle, "PNP0C09")) 1730 *order = 2; 1731 else if (acpi_MatchHid(handle, "PNP0C0F")) 1732 *order = 3; 1733 else if (type == ACPI_TYPE_PROCESSOR) 1734 *order = 100000; 1735 } 1736 1737 /* 1738 * Flag a device as disabled, because it isn't present according to the 1739 * _STA method. We set the recheck instance-variable, to make sure that we 1740 * recheck the device presence at a later point. 1741 */ 1742 static void 1743 acpi_disable_not_present(device_t child) 1744 { 1745 device_disable(child); 1746 acpi_set_recheck(child, 1); 1747 } 1748 1749 /* 1750 * This rechecks the device presence for all the devices which were disabled 1751 * using acpi_disable_not_present(). 1752 */ 1753 static void 1754 acpi_reprobe_children(device_t bus, device_t *children, int cnt) 1755 { 1756 int i; 1757 1758 for (i = 0; i < cnt; i++) { 1759 device_t dev = children[i]; 1760 1761 if (device_is_enabled(dev)) 1762 continue; 1763 1764 if (acpi_get_recheck(dev)) { 1765 if (acpi_DeviceIsPresent(dev)) { 1766 acpi_set_recheck(dev, 0); 1767 device_enable(dev); 1768 /* 1769 * Currently we parse the resources for every 1770 * device at the first time, when we see 1771 * that it is present. 1772 */ 1773 acpi_parse_resources(dev, acpi_get_handle(dev), 1774 &acpi_res_parse_set, NULL); 1775 } 1776 } 1777 } 1778 } 1779 1780 /* 1781 * Evaluate a child device and determine whether we might attach a device to 1782 * it. 1783 */ 1784 static ACPI_STATUS 1785 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1786 { 1787 struct acpi_prw_data prw; 1788 ACPI_OBJECT_TYPE type; 1789 ACPI_HANDLE h; 1790 device_t bus, child; 1791 int order; 1792 char *handle_str; 1793 1794 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1795 1796 if (acpi_disabled("children")) 1797 return_ACPI_STATUS (AE_OK); 1798 1799 /* Skip this device if we think we'll have trouble with it. */ 1800 if (acpi_avoid(handle)) 1801 return_ACPI_STATUS (AE_OK); 1802 1803 bus = (device_t)context; 1804 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1805 handle_str = acpi_name(handle); 1806 switch (type) { 1807 case ACPI_TYPE_DEVICE: 1808 /* 1809 * Since we scan from \, be sure to skip system scope objects. 1810 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1811 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1812 * during the intialization and \_TZ_ is to support Notify() on it. 1813 */ 1814 if (strcmp(handle_str, "\\_SB_") == 0 || 1815 strcmp(handle_str, "\\_TZ_") == 0) 1816 break; 1817 1818 if (acpi_parse_prw(handle, &prw) == 0) 1819 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1820 1821 /* FALLTHROUGH */ 1822 case ACPI_TYPE_PROCESSOR: 1823 case ACPI_TYPE_THERMAL: 1824 case ACPI_TYPE_POWER: 1825 /* 1826 * Create a placeholder device for this node. Sort the 1827 * placeholder so that the probe/attach passes will run 1828 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1829 * are reserved for special objects (i.e., system 1830 * resources). CPU devices have a very high order to 1831 * ensure they are probed after other devices. 1832 */ 1833 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1834 order = level * 10 + 100; 1835 acpi_probe_order(handle, &order); 1836 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1837 if (child == NULL) 1838 break; 1839 1840 /* Associate the handle with the device_t and vice versa. */ 1841 acpi_set_handle(child, handle); 1842 AcpiAttachData(handle, acpi_fake_objhandler, child); 1843 1844 /* 1845 * Check that the device is present. If it's not present, 1846 * leave it disabled (so that we have a device_t attached to 1847 * the handle, but we don't probe it). 1848 * 1849 * XXX PCI link devices sometimes report "present" but not 1850 * "functional" (i.e. if disabled). Go ahead and probe them 1851 * anyway since we may enable them later. 1852 */ 1853 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1854 /* Never disable PCI link devices. */ 1855 if (acpi_MatchHid(handle, "PNP0C0F")) 1856 break; 1857 /* 1858 * Docking stations should remain enabled since the system 1859 * may be undocked at boot. 1860 */ 1861 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1862 break; 1863 1864 acpi_disable_not_present(child); 1865 break; 1866 } 1867 1868 /* 1869 * Get the device's resource settings and attach them. 1870 * Note that if the device has _PRS but no _CRS, we need 1871 * to decide when it's appropriate to try to configure the 1872 * device. Ignore the return value here; it's OK for the 1873 * device not to have any resources. 1874 */ 1875 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1876 break; 1877 } 1878 } 1879 1880 return_ACPI_STATUS (AE_OK); 1881 } 1882 1883 /* 1884 * AcpiAttachData() requires an object handler but never uses it. This is a 1885 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1886 */ 1887 void 1888 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1889 { 1890 } 1891 1892 static void 1893 acpi_shutdown_final(void *arg, int howto) 1894 { 1895 struct acpi_softc *sc; 1896 ACPI_STATUS status; 1897 1898 /* 1899 * XXX Shutdown code should only run on the BSP (cpuid 0). 1900 * Some chipsets do not power off the system correctly if called from 1901 * an AP. 1902 */ 1903 sc = arg; 1904 if ((howto & RB_POWEROFF) != 0) { 1905 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1906 if (ACPI_FAILURE(status)) { 1907 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1908 AcpiFormatException(status)); 1909 return; 1910 } 1911 device_printf(sc->acpi_dev, "Powering system off\n"); 1912 ACPI_DISABLE_IRQS(); 1913 status = AcpiEnterSleepState(ACPI_STATE_S5); 1914 if (ACPI_FAILURE(status)) { 1915 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1916 AcpiFormatException(status)); 1917 } else { 1918 DELAY(1000000); 1919 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1920 } 1921 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1922 /* Reboot using the reset register. */ 1923 status = AcpiReset(); 1924 if (ACPI_FAILURE(status)) { 1925 if (status != AE_NOT_EXIST) 1926 device_printf(sc->acpi_dev, "reset failed - %s\n", 1927 AcpiFormatException(status)); 1928 } else { 1929 DELAY(1000000); 1930 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1931 } 1932 } else if (sc->acpi_do_disable && panicstr == NULL) { 1933 /* 1934 * Only disable ACPI if the user requested. On some systems, writing 1935 * the disable value to SMI_CMD hangs the system. 1936 */ 1937 device_printf(sc->acpi_dev, "Shutting down\n"); 1938 AcpiTerminate(); 1939 } 1940 } 1941 1942 static void 1943 acpi_enable_fixed_events(struct acpi_softc *sc) 1944 { 1945 static int first_time = 1; 1946 1947 /* Enable and clear fixed events and install handlers. */ 1948 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1949 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1950 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1951 acpi_event_power_button_sleep, sc); 1952 if (first_time) 1953 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1954 } 1955 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1956 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1957 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1958 acpi_event_sleep_button_sleep, sc); 1959 if (first_time) 1960 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1961 } 1962 1963 first_time = 0; 1964 } 1965 1966 /* 1967 * Returns true if the device is actually present and should 1968 * be attached to. This requires the present, enabled, UI-visible 1969 * and diagnostics-passed bits to be set. 1970 */ 1971 BOOLEAN 1972 acpi_DeviceIsPresent(device_t dev) 1973 { 1974 ACPI_HANDLE h; 1975 UINT32 s; 1976 ACPI_STATUS status; 1977 1978 h = acpi_get_handle(dev); 1979 if (h == NULL) 1980 return (FALSE); 1981 status = acpi_GetInteger(h, "_STA", &s); 1982 1983 /* 1984 * If no _STA method or if it failed, then assume that 1985 * the device is present. 1986 */ 1987 if (ACPI_FAILURE(status)) 1988 return (TRUE); 1989 1990 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE); 1991 } 1992 1993 /* 1994 * Returns true if the battery is actually present and inserted. 1995 */ 1996 BOOLEAN 1997 acpi_BatteryIsPresent(device_t dev) 1998 { 1999 ACPI_HANDLE h; 2000 UINT32 s; 2001 ACPI_STATUS status; 2002 2003 h = acpi_get_handle(dev); 2004 if (h == NULL) 2005 return (FALSE); 2006 status = acpi_GetInteger(h, "_STA", &s); 2007 2008 /* 2009 * If no _STA method or if it failed, then assume that 2010 * the device is present. 2011 */ 2012 if (ACPI_FAILURE(status)) 2013 return (TRUE); 2014 2015 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE); 2016 } 2017 2018 /* 2019 * Match a HID string against a handle 2020 */ 2021 BOOLEAN 2022 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2023 { 2024 ACPI_DEVICE_INFO *devinfo; 2025 int ret, i; 2026 2027 ret = FALSE; 2028 if (hid == NULL || h == NULL || 2029 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2030 return (ret); 2031 2032 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2033 strcmp(hid, devinfo->HardwareId.String) == 0) 2034 ret = TRUE; 2035 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 2036 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2037 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2038 ret = TRUE; 2039 break; 2040 } 2041 } 2042 } 2043 2044 AcpiOsFree(devinfo); 2045 return (ret); 2046 } 2047 2048 /* 2049 * Match a UID string against a handle 2050 */ 2051 BOOLEAN 2052 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 2053 { 2054 ACPI_DEVICE_INFO *devinfo; 2055 int ret; 2056 2057 ret = FALSE; 2058 if (uid == NULL || h == NULL || 2059 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2060 return (ret); 2061 2062 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 2063 strcmp(uid, devinfo->UniqueId.String) == 0) 2064 ret = TRUE; 2065 2066 AcpiOsFree(devinfo); 2067 return (ret); 2068 } 2069 2070 /* 2071 * Return the handle of a named object within our scope, ie. that of (parent) 2072 * or one if its parents. 2073 */ 2074 ACPI_STATUS 2075 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2076 { 2077 ACPI_HANDLE r; 2078 ACPI_STATUS status; 2079 2080 /* Walk back up the tree to the root */ 2081 for (;;) { 2082 status = AcpiGetHandle(parent, path, &r); 2083 if (ACPI_SUCCESS(status)) { 2084 *result = r; 2085 return (AE_OK); 2086 } 2087 /* XXX Return error here? */ 2088 if (status != AE_NOT_FOUND) 2089 return (AE_OK); 2090 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2091 return (AE_NOT_FOUND); 2092 parent = r; 2093 } 2094 } 2095 2096 /* 2097 * Allocate a buffer with a preset data size. 2098 */ 2099 ACPI_BUFFER * 2100 acpi_AllocBuffer(int size) 2101 { 2102 ACPI_BUFFER *buf; 2103 2104 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2105 return (NULL); 2106 buf->Length = size; 2107 buf->Pointer = (void *)(buf + 1); 2108 return (buf); 2109 } 2110 2111 ACPI_STATUS 2112 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2113 { 2114 ACPI_OBJECT arg1; 2115 ACPI_OBJECT_LIST args; 2116 2117 arg1.Type = ACPI_TYPE_INTEGER; 2118 arg1.Integer.Value = number; 2119 args.Count = 1; 2120 args.Pointer = &arg1; 2121 2122 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2123 } 2124 2125 /* 2126 * Evaluate a path that should return an integer. 2127 */ 2128 ACPI_STATUS 2129 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2130 { 2131 ACPI_STATUS status; 2132 ACPI_BUFFER buf; 2133 ACPI_OBJECT param; 2134 2135 if (handle == NULL) 2136 handle = ACPI_ROOT_OBJECT; 2137 2138 /* 2139 * Assume that what we've been pointed at is an Integer object, or 2140 * a method that will return an Integer. 2141 */ 2142 buf.Pointer = ¶m; 2143 buf.Length = sizeof(param); 2144 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2145 if (ACPI_SUCCESS(status)) { 2146 if (param.Type == ACPI_TYPE_INTEGER) 2147 *number = param.Integer.Value; 2148 else 2149 status = AE_TYPE; 2150 } 2151 2152 /* 2153 * In some applications, a method that's expected to return an Integer 2154 * may instead return a Buffer (probably to simplify some internal 2155 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2156 * convert it into an Integer as best we can. 2157 * 2158 * This is a hack. 2159 */ 2160 if (status == AE_BUFFER_OVERFLOW) { 2161 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2162 status = AE_NO_MEMORY; 2163 } else { 2164 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2165 if (ACPI_SUCCESS(status)) 2166 status = acpi_ConvertBufferToInteger(&buf, number); 2167 AcpiOsFree(buf.Pointer); 2168 } 2169 } 2170 return (status); 2171 } 2172 2173 ACPI_STATUS 2174 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2175 { 2176 ACPI_OBJECT *p; 2177 UINT8 *val; 2178 int i; 2179 2180 p = (ACPI_OBJECT *)bufp->Pointer; 2181 if (p->Type == ACPI_TYPE_INTEGER) { 2182 *number = p->Integer.Value; 2183 return (AE_OK); 2184 } 2185 if (p->Type != ACPI_TYPE_BUFFER) 2186 return (AE_TYPE); 2187 if (p->Buffer.Length > sizeof(int)) 2188 return (AE_BAD_DATA); 2189 2190 *number = 0; 2191 val = p->Buffer.Pointer; 2192 for (i = 0; i < p->Buffer.Length; i++) 2193 *number += val[i] << (i * 8); 2194 return (AE_OK); 2195 } 2196 2197 /* 2198 * Iterate over the elements of an a package object, calling the supplied 2199 * function for each element. 2200 * 2201 * XXX possible enhancement might be to abort traversal on error. 2202 */ 2203 ACPI_STATUS 2204 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2205 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2206 { 2207 ACPI_OBJECT *comp; 2208 int i; 2209 2210 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2211 return (AE_BAD_PARAMETER); 2212 2213 /* Iterate over components */ 2214 i = 0; 2215 comp = pkg->Package.Elements; 2216 for (; i < pkg->Package.Count; i++, comp++) 2217 func(comp, arg); 2218 2219 return (AE_OK); 2220 } 2221 2222 /* 2223 * Find the (index)th resource object in a set. 2224 */ 2225 ACPI_STATUS 2226 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2227 { 2228 ACPI_RESOURCE *rp; 2229 int i; 2230 2231 rp = (ACPI_RESOURCE *)buf->Pointer; 2232 i = index; 2233 while (i-- > 0) { 2234 /* Range check */ 2235 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2236 return (AE_BAD_PARAMETER); 2237 2238 /* Check for terminator */ 2239 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2240 return (AE_NOT_FOUND); 2241 rp = ACPI_NEXT_RESOURCE(rp); 2242 } 2243 if (resp != NULL) 2244 *resp = rp; 2245 2246 return (AE_OK); 2247 } 2248 2249 /* 2250 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2251 * 2252 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2253 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2254 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2255 * resources. 2256 */ 2257 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2258 2259 ACPI_STATUS 2260 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2261 { 2262 ACPI_RESOURCE *rp; 2263 void *newp; 2264 2265 /* Initialise the buffer if necessary. */ 2266 if (buf->Pointer == NULL) { 2267 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2268 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2269 return (AE_NO_MEMORY); 2270 rp = (ACPI_RESOURCE *)buf->Pointer; 2271 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2272 rp->Length = ACPI_RS_SIZE_MIN; 2273 } 2274 if (res == NULL) 2275 return (AE_OK); 2276 2277 /* 2278 * Scan the current buffer looking for the terminator. 2279 * This will either find the terminator or hit the end 2280 * of the buffer and return an error. 2281 */ 2282 rp = (ACPI_RESOURCE *)buf->Pointer; 2283 for (;;) { 2284 /* Range check, don't go outside the buffer */ 2285 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2286 return (AE_BAD_PARAMETER); 2287 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2288 break; 2289 rp = ACPI_NEXT_RESOURCE(rp); 2290 } 2291 2292 /* 2293 * Check the size of the buffer and expand if required. 2294 * 2295 * Required size is: 2296 * size of existing resources before terminator + 2297 * size of new resource and header + 2298 * size of terminator. 2299 * 2300 * Note that this loop should really only run once, unless 2301 * for some reason we are stuffing a *really* huge resource. 2302 */ 2303 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2304 res->Length + ACPI_RS_SIZE_NO_DATA + 2305 ACPI_RS_SIZE_MIN) >= buf->Length) { 2306 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2307 return (AE_NO_MEMORY); 2308 bcopy(buf->Pointer, newp, buf->Length); 2309 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2310 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2311 AcpiOsFree(buf->Pointer); 2312 buf->Pointer = newp; 2313 buf->Length += buf->Length; 2314 } 2315 2316 /* Insert the new resource. */ 2317 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2318 2319 /* And add the terminator. */ 2320 rp = ACPI_NEXT_RESOURCE(rp); 2321 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2322 rp->Length = ACPI_RS_SIZE_MIN; 2323 2324 return (AE_OK); 2325 } 2326 2327 /* 2328 * Set interrupt model. 2329 */ 2330 ACPI_STATUS 2331 acpi_SetIntrModel(int model) 2332 { 2333 2334 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2335 } 2336 2337 /* 2338 * DEPRECATED. This interface has serious deficiencies and will be 2339 * removed. 2340 * 2341 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2342 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2343 */ 2344 ACPI_STATUS 2345 acpi_SetSleepState(struct acpi_softc *sc, int state) 2346 { 2347 static int once; 2348 2349 if (!once) { 2350 device_printf(sc->acpi_dev, 2351 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2352 once = 1; 2353 } 2354 return (acpi_EnterSleepState(sc, state)); 2355 } 2356 2357 static void 2358 acpi_sleep_force(void *arg) 2359 { 2360 struct acpi_softc *sc; 2361 2362 sc = arg; 2363 device_printf(sc->acpi_dev, 2364 "suspend request timed out, forcing sleep now\n"); 2365 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2366 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2367 sc->acpi_next_sstate); 2368 } 2369 2370 /* 2371 * Request that the system enter the given suspend state. All /dev/apm 2372 * devices and devd(8) will be notified. Userland then has a chance to 2373 * save state and acknowledge the request. The system sleeps once all 2374 * acks are in. 2375 */ 2376 int 2377 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2378 { 2379 #ifdef notyet 2380 struct apm_clone_data *clone; 2381 #endif 2382 2383 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2384 return (EINVAL); 2385 2386 /* S5 (soft-off) should be entered directly with no waiting. */ 2387 if (state == ACPI_STATE_S5) { 2388 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2389 return (0); 2390 else 2391 return (ENXIO); 2392 } 2393 2394 /* This platform does not support acpi suspend/resume. */ 2395 return (EOPNOTSUPP); 2396 2397 /* If a suspend request is already in progress, just return. */ 2398 ACPI_LOCK(acpi); 2399 if (sc->acpi_next_sstate != 0) { 2400 ACPI_UNLOCK(acpi); 2401 return (0); 2402 } 2403 2404 /* Record the pending state and notify all apm devices. */ 2405 sc->acpi_next_sstate = state; 2406 #if 0 2407 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2408 clone->notify_status = APM_EV_NONE; 2409 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2410 KNOTE(&clone->sel_read.si_note, 0); 2411 } 2412 } 2413 #endif 2414 2415 /* If devd(8) is not running, immediately enter the sleep state. */ 2416 if (devctl_process_running() == FALSE) { 2417 ACPI_UNLOCK(acpi); 2418 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2419 return (0); 2420 } else { 2421 return (ENXIO); 2422 } 2423 } 2424 2425 /* Now notify devd(8) also. */ 2426 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2427 2428 /* 2429 * Set a timeout to fire if userland doesn't ack the suspend request 2430 * in time. This way we still eventually go to sleep if we were 2431 * overheating or running low on battery, even if userland is hung. 2432 * We cancel this timeout once all userland acks are in or the 2433 * suspend request is aborted. 2434 */ 2435 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2436 ACPI_UNLOCK(acpi); 2437 2438 return (0); 2439 } 2440 2441 /* 2442 * Acknowledge (or reject) a pending sleep state. The caller has 2443 * prepared for suspend and is now ready for it to proceed. If the 2444 * error argument is non-zero, it indicates suspend should be cancelled 2445 * and gives an errno value describing why. Once all votes are in, 2446 * we suspend the system. 2447 */ 2448 int 2449 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2450 { 2451 struct acpi_softc *sc; 2452 int ret, sleeping; 2453 2454 /* This platform does not support acpi suspend/resume. */ 2455 return (EOPNOTSUPP); 2456 2457 /* If no pending sleep state, return an error. */ 2458 ACPI_LOCK(acpi); 2459 sc = clone->acpi_sc; 2460 if (sc->acpi_next_sstate == 0) { 2461 ACPI_UNLOCK(acpi); 2462 return (ENXIO); 2463 } 2464 2465 /* Caller wants to abort suspend process. */ 2466 if (error) { 2467 sc->acpi_next_sstate = 0; 2468 callout_stop(&sc->susp_force_to); 2469 device_printf(sc->acpi_dev, 2470 "listener on %s cancelled the pending suspend\n", 2471 devtoname(clone->cdev)); 2472 ACPI_UNLOCK(acpi); 2473 return (0); 2474 } 2475 2476 /* 2477 * Mark this device as acking the suspend request. Then, walk through 2478 * all devices, seeing if they agree yet. We only count devices that 2479 * are writable since read-only devices couldn't ack the request. 2480 */ 2481 clone->notify_status = APM_EV_ACKED; 2482 sleeping = TRUE; 2483 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2484 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2485 clone->notify_status != APM_EV_ACKED) { 2486 sleeping = FALSE; 2487 break; 2488 } 2489 } 2490 2491 /* If all devices have voted "yes", we will suspend now. */ 2492 if (sleeping) 2493 callout_stop(&sc->susp_force_to); 2494 ACPI_UNLOCK(acpi); 2495 ret = 0; 2496 if (sleeping) { 2497 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2498 ret = ENODEV; 2499 } 2500 2501 return (ret); 2502 } 2503 2504 static void 2505 acpi_sleep_enable(void *arg) 2506 { 2507 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2508 } 2509 2510 enum acpi_sleep_state { 2511 ACPI_SS_NONE, 2512 ACPI_SS_GPE_SET, 2513 ACPI_SS_DEV_SUSPEND, 2514 ACPI_SS_SLP_PREP, 2515 ACPI_SS_SLEPT, 2516 }; 2517 2518 /* 2519 * Enter the desired system sleep state. 2520 * 2521 * Currently we support S1-S5 but S4 is only S4BIOS 2522 */ 2523 static ACPI_STATUS 2524 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2525 { 2526 ACPI_STATUS status; 2527 UINT8 TypeA; 2528 UINT8 TypeB; 2529 enum acpi_sleep_state slp_state; 2530 2531 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2532 2533 /* Re-entry once we're suspending is not allowed. */ 2534 status = AE_OK; 2535 ACPI_LOCK(acpi); 2536 if (sc->acpi_sleep_disabled) { 2537 ACPI_UNLOCK(acpi); 2538 device_printf(sc->acpi_dev, 2539 "suspend request ignored (not ready yet)\n"); 2540 return (AE_ERROR); 2541 } 2542 sc->acpi_sleep_disabled = 1; 2543 ACPI_UNLOCK(acpi); 2544 2545 /* 2546 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2547 * drivers need this. 2548 */ 2549 //get_mplock(); 2550 2551 slp_state = ACPI_SS_NONE; 2552 switch (state) { 2553 case ACPI_STATE_S1: 2554 case ACPI_STATE_S2: 2555 case ACPI_STATE_S3: 2556 case ACPI_STATE_S4: 2557 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2558 if (status == AE_NOT_FOUND) { 2559 device_printf(sc->acpi_dev, 2560 "Sleep state S%d not supported by BIOS\n", state); 2561 break; 2562 } else if (ACPI_FAILURE(status)) { 2563 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2564 AcpiFormatException(status)); 2565 break; 2566 } 2567 2568 sc->acpi_sstate = state; 2569 2570 /* Enable any GPEs as appropriate and requested by the user. */ 2571 acpi_wake_prep_walk(state); 2572 slp_state = ACPI_SS_GPE_SET; 2573 2574 /* 2575 * Inform all devices that we are going to sleep. If at least one 2576 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2577 * 2578 * XXX Note that a better two-pass approach with a 'veto' pass 2579 * followed by a "real thing" pass would be better, but the current 2580 * bus interface does not provide for this. 2581 */ 2582 if (DEVICE_SUSPEND(root_bus) != 0) { 2583 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2584 break; 2585 } 2586 slp_state = ACPI_SS_DEV_SUSPEND; 2587 2588 /* If testing device suspend only, back out of everything here. */ 2589 if (acpi_susp_bounce) 2590 break; 2591 2592 status = AcpiEnterSleepStatePrep(state); 2593 if (ACPI_FAILURE(status)) { 2594 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2595 AcpiFormatException(status)); 2596 break; 2597 } 2598 slp_state = ACPI_SS_SLP_PREP; 2599 2600 if (sc->acpi_sleep_delay > 0) 2601 DELAY(sc->acpi_sleep_delay * 1000000); 2602 2603 if (state != ACPI_STATE_S1) { 2604 acpi_sleep_machdep(sc, state); 2605 2606 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2607 if (state == ACPI_STATE_S4) 2608 AcpiEnable(); 2609 } else { 2610 ACPI_DISABLE_IRQS(); 2611 status = AcpiEnterSleepState(state); 2612 if (ACPI_FAILURE(status)) { 2613 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2614 AcpiFormatException(status)); 2615 break; 2616 } 2617 } 2618 slp_state = ACPI_SS_SLEPT; 2619 break; 2620 case ACPI_STATE_S5: 2621 /* 2622 * Shut down cleanly and power off. This will call us back through the 2623 * shutdown handlers. 2624 */ 2625 shutdown_nice(RB_POWEROFF); 2626 break; 2627 case ACPI_STATE_S0: 2628 default: 2629 status = AE_BAD_PARAMETER; 2630 break; 2631 } 2632 2633 /* 2634 * Back out state according to how far along we got in the suspend 2635 * process. This handles both the error and success cases. 2636 */ 2637 sc->acpi_next_sstate = 0; 2638 if (slp_state >= ACPI_SS_GPE_SET) { 2639 acpi_wake_prep_walk(state); 2640 sc->acpi_sstate = ACPI_STATE_S0; 2641 } 2642 if (slp_state >= ACPI_SS_SLP_PREP) 2643 AcpiLeaveSleepState(state); 2644 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2645 DEVICE_RESUME(root_bus); 2646 if (slp_state >= ACPI_SS_SLEPT) 2647 acpi_enable_fixed_events(sc); 2648 2649 /* Allow another sleep request after a while. */ 2650 /* XXX: needs timeout */ 2651 if (state != ACPI_STATE_S5) 2652 acpi_sleep_enable(sc); 2653 2654 /* Run /etc/rc.resume after we are back. */ 2655 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2656 2657 //rel_mplock(); 2658 2659 return_ACPI_STATUS (status); 2660 } 2661 2662 /* Enable or disable the device's GPE. */ 2663 int 2664 acpi_wake_set_enable(device_t dev, int enable) 2665 { 2666 struct acpi_prw_data prw; 2667 ACPI_STATUS status; 2668 int flags; 2669 2670 /* Make sure the device supports waking the system and get the GPE. */ 2671 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2672 return (ENXIO); 2673 2674 flags = acpi_get_flags(dev); 2675 if (enable) { 2676 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2677 ACPI_GPE_ENABLE); 2678 if (ACPI_FAILURE(status)) { 2679 device_printf(dev, "enable wake failed\n"); 2680 return (ENXIO); 2681 } 2682 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2683 } else { 2684 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2685 ACPI_GPE_DISABLE); 2686 if (ACPI_FAILURE(status)) { 2687 device_printf(dev, "disable wake failed\n"); 2688 return (ENXIO); 2689 } 2690 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2691 } 2692 2693 return (0); 2694 } 2695 2696 static int 2697 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2698 { 2699 struct acpi_prw_data prw; 2700 device_t dev; 2701 2702 /* Check that this is a wake-capable device and get its GPE. */ 2703 if (acpi_parse_prw(handle, &prw) != 0) 2704 return (ENXIO); 2705 dev = acpi_get_device(handle); 2706 2707 /* 2708 * The destination sleep state must be less than (i.e., higher power) 2709 * or equal to the value specified by _PRW. If this GPE cannot be 2710 * enabled for the next sleep state, then disable it. If it can and 2711 * the user requested it be enabled, turn on any required power resources 2712 * and set _PSW. 2713 */ 2714 if (sstate > prw.lowest_wake) { 2715 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2716 if (bootverbose) 2717 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2718 acpi_name(handle), sstate); 2719 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2720 acpi_pwr_wake_enable(handle, 1); 2721 acpi_SetInteger(handle, "_PSW", 1); 2722 if (bootverbose) 2723 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2724 acpi_name(handle), sstate); 2725 } 2726 2727 return (0); 2728 } 2729 2730 static int 2731 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2732 { 2733 struct acpi_prw_data prw; 2734 device_t dev; 2735 2736 /* 2737 * Check that this is a wake-capable device and get its GPE. Return 2738 * now if the user didn't enable this device for wake. 2739 */ 2740 if (acpi_parse_prw(handle, &prw) != 0) 2741 return (ENXIO); 2742 dev = acpi_get_device(handle); 2743 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2744 return (0); 2745 2746 /* 2747 * If this GPE couldn't be enabled for the previous sleep state, it was 2748 * disabled before going to sleep so re-enable it. If it was enabled, 2749 * clear _PSW and turn off any power resources it used. 2750 */ 2751 if (sstate > prw.lowest_wake) { 2752 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2753 if (bootverbose) 2754 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2755 } else { 2756 acpi_SetInteger(handle, "_PSW", 0); 2757 acpi_pwr_wake_enable(handle, 0); 2758 if (bootverbose) 2759 device_printf(dev, "run_prep cleaned up for %s\n", 2760 acpi_name(handle)); 2761 } 2762 2763 return (0); 2764 } 2765 2766 static ACPI_STATUS 2767 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2768 { 2769 int sstate; 2770 2771 /* If suspending, run the sleep prep function, otherwise wake. */ 2772 sstate = *(int *)context; 2773 if (AcpiGbl_SystemAwakeAndRunning) 2774 acpi_wake_sleep_prep(handle, sstate); 2775 else 2776 acpi_wake_run_prep(handle, sstate); 2777 return (AE_OK); 2778 } 2779 2780 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2781 static int 2782 acpi_wake_prep_walk(int sstate) 2783 { 2784 ACPI_HANDLE sb_handle; 2785 2786 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2787 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2788 acpi_wake_prep, NULL, &sstate, NULL); 2789 } 2790 return (0); 2791 } 2792 2793 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2794 static int 2795 acpi_wake_sysctl_walk(device_t dev) 2796 { 2797 #ifdef notyet 2798 int error, i, numdevs; 2799 device_t *devlist; 2800 device_t child; 2801 ACPI_STATUS status; 2802 2803 error = device_get_children(dev, &devlist, &numdevs); 2804 if (error != 0 || numdevs == 0) { 2805 if (numdevs == 0) 2806 kfree(devlist, M_TEMP); 2807 return (error); 2808 } 2809 for (i = 0; i < numdevs; i++) { 2810 child = devlist[i]; 2811 acpi_wake_sysctl_walk(child); 2812 if (!device_is_attached(child)) 2813 continue; 2814 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2815 if (ACPI_SUCCESS(status)) { 2816 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2817 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2818 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2819 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2820 } 2821 } 2822 kfree(devlist, M_TEMP); 2823 #endif 2824 2825 return (0); 2826 } 2827 2828 #ifdef notyet 2829 /* Enable or disable wake from userland. */ 2830 static int 2831 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2832 { 2833 int enable, error; 2834 device_t dev; 2835 2836 dev = (device_t)arg1; 2837 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2838 2839 error = sysctl_handle_int(oidp, &enable, 0, req); 2840 if (error != 0 || req->newptr == NULL) 2841 return (error); 2842 if (enable != 0 && enable != 1) 2843 return (EINVAL); 2844 2845 return (acpi_wake_set_enable(dev, enable)); 2846 } 2847 #endif 2848 2849 /* Parse a device's _PRW into a structure. */ 2850 int 2851 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2852 { 2853 ACPI_STATUS status; 2854 ACPI_BUFFER prw_buffer; 2855 ACPI_OBJECT *res, *res2; 2856 int error, i, power_count; 2857 2858 if (h == NULL || prw == NULL) 2859 return (EINVAL); 2860 2861 /* 2862 * The _PRW object (7.2.9) is only required for devices that have the 2863 * ability to wake the system from a sleeping state. 2864 */ 2865 error = EINVAL; 2866 prw_buffer.Pointer = NULL; 2867 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2868 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2869 if (ACPI_FAILURE(status)) 2870 return (ENOENT); 2871 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2872 if (res == NULL) 2873 return (ENOENT); 2874 if (!ACPI_PKG_VALID(res, 2)) 2875 goto out; 2876 2877 /* 2878 * Element 1 of the _PRW object: 2879 * The lowest power system sleeping state that can be entered while still 2880 * providing wake functionality. The sleeping state being entered must 2881 * be less than (i.e., higher power) or equal to this value. 2882 */ 2883 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2884 goto out; 2885 2886 /* 2887 * Element 0 of the _PRW object: 2888 */ 2889 switch (res->Package.Elements[0].Type) { 2890 case ACPI_TYPE_INTEGER: 2891 /* 2892 * If the data type of this package element is numeric, then this 2893 * _PRW package element is the bit index in the GPEx_EN, in the 2894 * GPE blocks described in the FADT, of the enable bit that is 2895 * enabled for the wake event. 2896 */ 2897 prw->gpe_handle = NULL; 2898 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2899 error = 0; 2900 break; 2901 case ACPI_TYPE_PACKAGE: 2902 /* 2903 * If the data type of this package element is a package, then this 2904 * _PRW package element is itself a package containing two 2905 * elements. The first is an object reference to the GPE Block 2906 * device that contains the GPE that will be triggered by the wake 2907 * event. The second element is numeric and it contains the bit 2908 * index in the GPEx_EN, in the GPE Block referenced by the 2909 * first element in the package, of the enable bit that is enabled for 2910 * the wake event. 2911 * 2912 * For example, if this field is a package then it is of the form: 2913 * Package() {\_SB.PCI0.ISA.GPE, 2} 2914 */ 2915 res2 = &res->Package.Elements[0]; 2916 if (!ACPI_PKG_VALID(res2, 2)) 2917 goto out; 2918 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2919 if (prw->gpe_handle == NULL) 2920 goto out; 2921 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2922 goto out; 2923 error = 0; 2924 break; 2925 default: 2926 goto out; 2927 } 2928 2929 /* Elements 2 to N of the _PRW object are power resources. */ 2930 power_count = res->Package.Count - 2; 2931 if (power_count > ACPI_PRW_MAX_POWERRES) { 2932 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2933 power_count = 0; 2934 } 2935 prw->power_res_count = power_count; 2936 for (i = 0; i < power_count; i++) 2937 prw->power_res[i] = res->Package.Elements[i]; 2938 2939 out: 2940 if (prw_buffer.Pointer != NULL) 2941 AcpiOsFree(prw_buffer.Pointer); 2942 return (error); 2943 } 2944 2945 /* 2946 * ACPI Event Handlers 2947 */ 2948 2949 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2950 2951 static void 2952 acpi_system_eventhandler_sleep(void *arg, int state) 2953 { 2954 struct acpi_softc *sc; 2955 int ret; 2956 2957 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2958 2959 sc = arg; 2960 2961 /* Check if button action is disabled. */ 2962 if (state == ACPI_S_STATES_MAX + 1) 2963 return; 2964 2965 /* Request that the system prepare to enter the given suspend state. */ 2966 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2967 if (ret != 0) 2968 device_printf(sc->acpi_dev, 2969 "request to enter state S%d failed (err %d)\n", state, ret); 2970 2971 return_VOID; 2972 } 2973 2974 static void 2975 acpi_system_eventhandler_wakeup(void *arg, int state) 2976 { 2977 2978 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2979 2980 /* Currently, nothing to do for wakeup. */ 2981 2982 return_VOID; 2983 } 2984 2985 /* 2986 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2987 */ 2988 UINT32 2989 acpi_event_power_button_sleep(void *context) 2990 { 2991 struct acpi_softc *sc = (struct acpi_softc *)context; 2992 2993 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2994 2995 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2996 2997 return_VALUE (ACPI_INTERRUPT_HANDLED); 2998 } 2999 3000 UINT32 3001 acpi_event_power_button_wake(void *context) 3002 { 3003 struct acpi_softc *sc = (struct acpi_softc *)context; 3004 3005 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3006 3007 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 3008 3009 return_VALUE (ACPI_INTERRUPT_HANDLED); 3010 } 3011 3012 UINT32 3013 acpi_event_sleep_button_sleep(void *context) 3014 { 3015 struct acpi_softc *sc = (struct acpi_softc *)context; 3016 3017 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3018 3019 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3020 3021 return_VALUE (ACPI_INTERRUPT_HANDLED); 3022 } 3023 3024 UINT32 3025 acpi_event_sleep_button_wake(void *context) 3026 { 3027 struct acpi_softc *sc = (struct acpi_softc *)context; 3028 3029 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3030 3031 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3032 3033 return_VALUE (ACPI_INTERRUPT_HANDLED); 3034 } 3035 3036 /* 3037 * XXX This static buffer is suboptimal. There is no locking so only 3038 * use this for single-threaded callers. 3039 */ 3040 char * 3041 acpi_name(ACPI_HANDLE handle) 3042 { 3043 ACPI_BUFFER buf; 3044 static char data[256]; 3045 3046 buf.Length = sizeof(data); 3047 buf.Pointer = data; 3048 3049 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3050 return (data); 3051 return ("(unknown)"); 3052 } 3053 3054 /* 3055 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3056 * parts of the namespace. 3057 */ 3058 int 3059 acpi_avoid(ACPI_HANDLE handle) 3060 { 3061 char *cp, *env, *np; 3062 int len; 3063 3064 np = acpi_name(handle); 3065 if (*np == '\\') 3066 np++; 3067 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 3068 return (0); 3069 3070 /* Scan the avoid list checking for a match */ 3071 cp = env; 3072 for (;;) { 3073 while (*cp != 0 && isspace(*cp)) 3074 cp++; 3075 if (*cp == 0) 3076 break; 3077 len = 0; 3078 while (cp[len] != 0 && !isspace(cp[len])) 3079 len++; 3080 if (!strncmp(cp, np, len)) { 3081 kfreeenv(env); 3082 return(1); 3083 } 3084 cp += len; 3085 } 3086 kfreeenv(env); 3087 3088 return (0); 3089 } 3090 3091 /* 3092 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3093 */ 3094 int 3095 acpi_disabled(char *subsys) 3096 { 3097 char *cp, *env; 3098 int len; 3099 3100 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3101 return (0); 3102 if (strcmp(env, "all") == 0) { 3103 kfreeenv(env); 3104 return (1); 3105 } 3106 3107 /* Scan the disable list, checking for a match. */ 3108 cp = env; 3109 for (;;) { 3110 while (*cp != '\0' && isspace(*cp)) 3111 cp++; 3112 if (*cp == '\0') 3113 break; 3114 len = 0; 3115 while (cp[len] != '\0' && !isspace(cp[len])) 3116 len++; 3117 if (strncmp(cp, subsys, len) == 0) { 3118 kfreeenv(env); 3119 return (1); 3120 } 3121 cp += len; 3122 } 3123 kfreeenv(env); 3124 3125 return (0); 3126 } 3127 3128 /* 3129 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3130 * components are enabled by default. The ones that are not have to be 3131 * enabled via debug.acpi.enabled. 3132 */ 3133 int 3134 acpi_enabled(char *subsys) 3135 { 3136 char *cp, *env; 3137 int len; 3138 3139 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3140 return (0); 3141 if (strcmp(env, "all") == 0) { 3142 kfreeenv(env); 3143 return (1); 3144 } 3145 3146 /* Scan the enable list, checking for a match. */ 3147 cp = env; 3148 for (;;) { 3149 while (*cp != '\0' && isspace(*cp)) 3150 cp++; 3151 if (*cp == '\0') 3152 break; 3153 len = 0; 3154 while (cp[len] != '\0' && !isspace(cp[len])) 3155 len++; 3156 if (strncmp(cp, subsys, len) == 0) { 3157 kfreeenv(env); 3158 return (1); 3159 } 3160 cp += len; 3161 } 3162 kfreeenv(env); 3163 3164 return (0); 3165 } 3166 3167 /* 3168 * Control interface. 3169 * 3170 * We multiplex ioctls for all participating ACPI devices here. Individual 3171 * drivers wanting to be accessible via /dev/acpi should use the 3172 * register/deregister interface to make their handlers visible. 3173 */ 3174 struct acpi_ioctl_hook 3175 { 3176 TAILQ_ENTRY(acpi_ioctl_hook) link; 3177 u_long cmd; 3178 acpi_ioctl_fn fn; 3179 void *arg; 3180 }; 3181 3182 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3183 static int acpi_ioctl_hooks_initted; 3184 3185 int 3186 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3187 { 3188 struct acpi_ioctl_hook *hp; 3189 3190 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3191 return (ENOMEM); 3192 hp->cmd = cmd; 3193 hp->fn = fn; 3194 hp->arg = arg; 3195 3196 ACPI_LOCK(acpi); 3197 if (acpi_ioctl_hooks_initted == 0) { 3198 TAILQ_INIT(&acpi_ioctl_hooks); 3199 acpi_ioctl_hooks_initted = 1; 3200 } 3201 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3202 ACPI_UNLOCK(acpi); 3203 3204 return (0); 3205 } 3206 3207 void 3208 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3209 { 3210 struct acpi_ioctl_hook *hp; 3211 3212 ACPI_LOCK(acpi); 3213 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3214 if (hp->cmd == cmd && hp->fn == fn) 3215 break; 3216 3217 if (hp != NULL) { 3218 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3219 kfree(hp, M_ACPIDEV); 3220 } 3221 ACPI_UNLOCK(acpi); 3222 } 3223 3224 static int 3225 acpiopen(struct dev_open_args *ap) 3226 { 3227 return (0); 3228 } 3229 3230 static int 3231 acpiclose(struct dev_close_args *ap) 3232 { 3233 return (0); 3234 } 3235 3236 static void 3237 acpi_free_object_list(ACPI_OBJECT_LIST *list) 3238 { 3239 for (int i = 0; i < list->Count; i++) { 3240 switch (list->Pointer[i].Type) { 3241 case ACPI_TYPE_STRING: 3242 AcpiOsFree(list->Pointer[i].String.Pointer); 3243 break; 3244 case ACPI_TYPE_BUFFER: 3245 AcpiOsFree(list->Pointer[i].Buffer.Pointer); 3246 break; 3247 default: 3248 break; 3249 } 3250 } 3251 AcpiOsFree(list); 3252 } 3253 3254 static ACPI_OBJECT_LIST * 3255 acpi_copyin_object_list(ACPI_OBJECT_LIST *src) 3256 { 3257 ACPI_OBJECT_LIST *dest; 3258 BOOLEAN failed; 3259 3260 if (src->Count > 7) 3261 return NULL; 3262 3263 dest = AcpiOsAllocate(sizeof(ACPI_OBJECT_LIST) + sizeof(ACPI_OBJECT) * src->Count); 3264 if (!dest) 3265 return NULL; 3266 3267 dest->Count = src->Count; 3268 dest->Pointer = (ACPI_OBJECT *)(dest + 1); 3269 if (copyin(src->Pointer, dest->Pointer, sizeof(ACPI_OBJECT) * dest->Count)) { 3270 AcpiOsFree(dest); 3271 return NULL; 3272 } 3273 3274 failed = FALSE; 3275 3276 for (int i = 0; i < dest->Count; i++) { 3277 switch (dest->Pointer[i].Type) { 3278 case ACPI_TYPE_INTEGER: 3279 break; 3280 case ACPI_TYPE_STRING: { 3281 void *v = AcpiOsAllocate(dest->Pointer[i].String.Length); 3282 if (!v || copyin(dest->Pointer[i].String.Pointer, v, dest->Pointer[i].String.Length)) 3283 failed = TRUE; 3284 dest->Pointer[i].String.Pointer = v; 3285 break; 3286 } 3287 case ACPI_TYPE_BUFFER: { 3288 void *v = AcpiOsAllocate(dest->Pointer[i].Buffer.Length); 3289 if (!v || copyin(dest->Pointer[i].Buffer.Pointer, v, dest->Pointer[i].Buffer.Length)) 3290 failed = TRUE; 3291 dest->Pointer[i].String.Pointer = v; 3292 break; 3293 } 3294 default: 3295 failed = TRUE; 3296 break; 3297 } 3298 } 3299 3300 if (failed) { 3301 acpi_free_object_list(dest); 3302 dest = NULL; 3303 } 3304 3305 return dest; 3306 } 3307 3308 static int 3309 acpi_call_ioctl(caddr_t addr) 3310 { 3311 struct acpi_mcall_ioctl_arg *params; 3312 ACPI_OBJECT_LIST *args; 3313 ACPI_BUFFER result; 3314 char path[256]; 3315 3316 result.Length = ACPI_ALLOCATE_BUFFER; 3317 result.Pointer = NULL; 3318 3319 params = (struct acpi_mcall_ioctl_arg *)addr; 3320 args = acpi_copyin_object_list(¶ms->args); 3321 if (!args) 3322 return EINVAL; 3323 if (copyinstr(params->path, path, sizeof(path), NULL)) 3324 return EINVAL; 3325 params->retval = AcpiEvaluateObject(NULL, path, args, &result); 3326 if (ACPI_SUCCESS(params->retval)) { 3327 if (result.Pointer != NULL) { 3328 if (params->result.Pointer != NULL) { 3329 params->result.Length = min(params->result.Length, 3330 result.Length); 3331 if (result.Length >= sizeof(ACPI_OBJECT)) { 3332 acpi_call_fixup_pointers((ACPI_OBJECT *)result.Pointer, 3333 params->result.Pointer); 3334 } 3335 copyout(result.Pointer, params->result.Pointer, 3336 params->result.Length); 3337 params->reslen = result.Length; 3338 } 3339 AcpiOsFree(result.Pointer); 3340 } 3341 } 3342 acpi_free_object_list(args); 3343 3344 return (0); 3345 } 3346 3347 void 3348 acpi_call_fixup_pointers(ACPI_OBJECT *p, UINT8 *dest) 3349 { 3350 switch (p->Type) { 3351 case ACPI_TYPE_STRING: 3352 p->String.Pointer += dest - (UINT8 *)p; 3353 break; 3354 case ACPI_TYPE_BUFFER: 3355 p->Buffer.Pointer += dest - (UINT8 *)p; 3356 break; 3357 } 3358 } 3359 3360 static int 3361 acpiioctl(struct dev_ioctl_args *ap) 3362 { 3363 struct acpi_softc *sc; 3364 struct acpi_ioctl_hook *hp; 3365 int error, state; 3366 3367 error = 0; 3368 hp = NULL; 3369 sc = ap->a_head.a_dev->si_drv1; 3370 3371 /* 3372 * Scan the list of registered ioctls, looking for handlers. 3373 */ 3374 lwkt_gettoken(&acpi_token); 3375 ACPI_LOCK(acpi); 3376 if (acpi_ioctl_hooks_initted) { 3377 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3378 if (hp->cmd == ap->a_cmd) 3379 break; 3380 } 3381 } 3382 ACPI_UNLOCK(acpi); 3383 if (hp) { 3384 error = hp->fn(ap->a_cmd, ap->a_data, hp->arg); 3385 lwkt_reltoken(&acpi_token); 3386 return error; 3387 } 3388 3389 /* 3390 * Core ioctls are not permitted for non-writable user. 3391 * Currently, other ioctls just fetch information. 3392 * Not changing system behavior. 3393 */ 3394 if ((ap->a_fflag & FWRITE) == 0) { 3395 lwkt_reltoken(&acpi_token); 3396 return (EPERM); 3397 } 3398 3399 /* Core system ioctls. */ 3400 switch (ap->a_cmd) { 3401 case ACPIIO_REQSLPSTATE: 3402 state = *(int *)ap->a_data; 3403 if (state != ACPI_STATE_S5) 3404 error = acpi_ReqSleepState(sc, state); 3405 else { 3406 device_printf(sc->acpi_dev, 3407 "power off via acpi ioctl not supported\n"); 3408 error = ENXIO; 3409 } 3410 break; 3411 case ACPIIO_ACKSLPSTATE: 3412 error = EOPNOTSUPP; 3413 #if 0 /* notyet */ 3414 error = *(int *)ap->a_data; 3415 error = acpi_AckSleepState(sc->acpi_clone, error); 3416 #endif 3417 break; 3418 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3419 error = EINVAL; 3420 state = *(int *)ap->a_data; 3421 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3422 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3423 error = 0; 3424 break; 3425 case ACPIIO_DO_MCALL: 3426 if (acpi_allow_mcall == 1) { 3427 error = acpi_call_ioctl(ap->a_data); 3428 } else { 3429 device_printf(sc->acpi_dev, 3430 "debug.acpi.allow_method_calls tunable must be set\n"); 3431 error = ENXIO; 3432 } 3433 break; 3434 default: 3435 error = ENXIO; 3436 break; 3437 } 3438 lwkt_reltoken(&acpi_token); 3439 3440 return (error); 3441 } 3442 3443 static int 3444 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3445 { 3446 int error; 3447 struct sbuf sb; 3448 UINT8 state, TypeA, TypeB; 3449 3450 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3451 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3452 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3453 sbuf_printf(&sb, "S%d ", state); 3454 sbuf_trim(&sb); 3455 sbuf_finish(&sb); 3456 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3457 sbuf_delete(&sb); 3458 return (error); 3459 } 3460 3461 static int 3462 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3463 { 3464 char sleep_state[10]; 3465 int error; 3466 u_int new_state, old_state; 3467 3468 old_state = *(u_int *)oidp->oid_arg1; 3469 if (old_state > ACPI_S_STATES_MAX + 1) 3470 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3471 else 3472 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3473 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3474 if (error == 0 && req->newptr != NULL) { 3475 new_state = ACPI_STATE_S0; 3476 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3477 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3478 break; 3479 if (new_state <= ACPI_S_STATES_MAX + 1) { 3480 if (new_state != old_state) 3481 *(u_int *)oidp->oid_arg1 = new_state; 3482 } else 3483 error = EINVAL; 3484 } 3485 3486 return (error); 3487 } 3488 3489 /* Inform devctl(4) when we receive a Notify. */ 3490 void 3491 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3492 { 3493 char notify_buf[16]; 3494 ACPI_BUFFER handle_buf; 3495 ACPI_STATUS status; 3496 3497 if (subsystem == NULL) 3498 return; 3499 3500 handle_buf.Pointer = NULL; 3501 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3502 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3503 if (ACPI_FAILURE(status)) 3504 return; 3505 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3506 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3507 AcpiOsFree(handle_buf.Pointer); 3508 } 3509 3510 #ifdef ACPI_DEBUG 3511 /* 3512 * Support for parsing debug options from the kernel environment. 3513 * 3514 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3515 * by specifying the names of the bits in the debug.acpi.layer and 3516 * debug.acpi.level environment variables. Bits may be unset by 3517 * prefixing the bit name with !. 3518 */ 3519 struct debugtag 3520 { 3521 char *name; 3522 UINT32 value; 3523 }; 3524 3525 static struct debugtag dbg_layer[] = { 3526 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3527 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3528 {"ACPI_EVENTS", ACPI_EVENTS}, 3529 {"ACPI_TABLES", ACPI_TABLES}, 3530 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3531 {"ACPI_PARSER", ACPI_PARSER}, 3532 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3533 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3534 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3535 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3536 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3537 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3538 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3539 3540 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3541 {"ACPI_BATTERY", ACPI_BATTERY}, 3542 {"ACPI_BUS", ACPI_BUS}, 3543 {"ACPI_BUTTON", ACPI_BUTTON}, 3544 {"ACPI_EC", ACPI_EC}, 3545 {"ACPI_FAN", ACPI_FAN}, 3546 {"ACPI_POWERRES", ACPI_POWERRES}, 3547 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3548 {"ACPI_THERMAL", ACPI_THERMAL}, 3549 {"ACPI_TIMER", ACPI_TIMER}, 3550 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3551 {NULL, 0} 3552 }; 3553 3554 static struct debugtag dbg_level[] = { 3555 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3556 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3557 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3558 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3559 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3560 3561 /* Trace verbosity level 1 [Standard Trace Level] */ 3562 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3563 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3564 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3565 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3566 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3567 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3568 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3569 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3570 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3571 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3572 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3573 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3574 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3575 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3576 {"ACPI_LV_EVALUATION", ACPI_LV_EVALUATION}, 3577 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3578 3579 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3580 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3581 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3582 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3583 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3584 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3585 3586 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3587 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3588 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3589 {"ACPI_LV_IO", ACPI_LV_IO}, 3590 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3591 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3592 3593 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3594 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3595 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3596 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3597 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3598 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3599 {NULL, 0} 3600 }; 3601 3602 static void 3603 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3604 { 3605 char *ep; 3606 int i, l; 3607 int set; 3608 3609 while (*cp) { 3610 if (isspace(*cp)) { 3611 cp++; 3612 continue; 3613 } 3614 ep = cp; 3615 while (*ep && !isspace(*ep)) 3616 ep++; 3617 if (*cp == '!') { 3618 set = 0; 3619 cp++; 3620 if (cp == ep) 3621 continue; 3622 } else { 3623 set = 1; 3624 } 3625 l = ep - cp; 3626 for (i = 0; tag[i].name != NULL; i++) { 3627 if (!strncmp(cp, tag[i].name, l)) { 3628 if (set) 3629 *flag |= tag[i].value; 3630 else 3631 *flag &= ~tag[i].value; 3632 } 3633 } 3634 cp = ep; 3635 } 3636 } 3637 3638 static void 3639 acpi_set_debugging(void *junk) 3640 { 3641 char *layer, *level; 3642 3643 if (cold) { 3644 AcpiDbgLayer = 0; 3645 AcpiDbgLevel = 0; 3646 } 3647 3648 layer = kgetenv("debug.acpi.layer"); 3649 level = kgetenv("debug.acpi.level"); 3650 if (layer == NULL && level == NULL) 3651 return; 3652 3653 kprintf("ACPI set debug"); 3654 if (layer != NULL) { 3655 if (strcmp("NONE", layer) != 0) 3656 kprintf(" layer '%s'", layer); 3657 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3658 kfreeenv(layer); 3659 } 3660 if (level != NULL) { 3661 if (strcmp("NONE", level) != 0) 3662 kprintf(" level '%s'", level); 3663 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3664 kfreeenv(level); 3665 } 3666 kprintf("\n"); 3667 } 3668 3669 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3670 NULL); 3671 3672 static int 3673 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3674 { 3675 int error, *dbg; 3676 struct debugtag *tag; 3677 struct sbuf sb; 3678 3679 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3680 return (ENOMEM); 3681 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3682 tag = &dbg_layer[0]; 3683 dbg = &AcpiDbgLayer; 3684 } else { 3685 tag = &dbg_level[0]; 3686 dbg = &AcpiDbgLevel; 3687 } 3688 3689 /* Get old values if this is a get request. */ 3690 ACPI_SERIAL_BEGIN(acpi); 3691 if (*dbg == 0) { 3692 sbuf_cpy(&sb, "NONE"); 3693 } else if (req->newptr == NULL) { 3694 for (; tag->name != NULL; tag++) { 3695 if ((*dbg & tag->value) == tag->value) 3696 sbuf_printf(&sb, "%s ", tag->name); 3697 } 3698 } 3699 sbuf_trim(&sb); 3700 sbuf_finish(&sb); 3701 3702 /* Copy out the old values to the user. */ 3703 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3704 sbuf_delete(&sb); 3705 3706 /* If the user is setting a string, parse it. */ 3707 if (error == 0 && req->newptr != NULL) { 3708 *dbg = 0; 3709 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3710 acpi_set_debugging(NULL); 3711 } 3712 ACPI_SERIAL_END(acpi); 3713 3714 return (error); 3715 } 3716 3717 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3718 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3719 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3720 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3721 #endif /* ACPI_DEBUG */ 3722 3723 static int 3724 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3725 { 3726 int error; 3727 int old; 3728 3729 old = acpi_debug_objects; 3730 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3731 if (error != 0 || req->newptr == NULL) 3732 return (error); 3733 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3734 return (0); 3735 3736 ACPI_SERIAL_BEGIN(acpi); 3737 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3738 ACPI_SERIAL_END(acpi); 3739 3740 return (0); 3741 } 3742 3743 3744 static int 3745 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3746 { 3747 char *p; 3748 size_t len; 3749 int i, j; 3750 3751 p = str; 3752 while (isspace(*p) || *p == ',') 3753 p++; 3754 len = strlen(p); 3755 if (len == 0) 3756 return (0); 3757 p = kstrdup(p, M_TEMP); 3758 for (i = 0; i < len; i++) 3759 if (p[i] == ',') 3760 p[i] = '\0'; 3761 i = j = 0; 3762 while (i < len) 3763 if (isspace(p[i]) || p[i] == '\0') 3764 i++; 3765 else { 3766 i += strlen(p + i) + 1; 3767 j++; 3768 } 3769 if (j == 0) { 3770 kfree(p, M_TEMP); 3771 return (0); 3772 } 3773 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3774 iface->num = j; 3775 i = j = 0; 3776 while (i < len) 3777 if (isspace(p[i]) || p[i] == '\0') 3778 i++; 3779 else { 3780 iface->data[j] = p + i; 3781 i += strlen(p + i) + 1; 3782 j++; 3783 } 3784 3785 return (j); 3786 } 3787 3788 static void 3789 acpi_free_interfaces(struct acpi_interface *iface) 3790 { 3791 kfree(iface->data[0], M_TEMP); 3792 kfree(iface->data, M_TEMP); 3793 } 3794 3795 static void 3796 acpi_reset_interfaces(device_t dev) 3797 { 3798 struct acpi_interface list; 3799 ACPI_STATUS status; 3800 int i; 3801 3802 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3803 for (i = 0; i < list.num; i++) { 3804 status = AcpiInstallInterface(list.data[i]); 3805 if (ACPI_FAILURE(status)) 3806 device_printf(dev, 3807 "failed to install _OSI(\"%s\"): %s\n", 3808 list.data[i], AcpiFormatException(status)); 3809 else if (bootverbose) 3810 device_printf(dev, "installed _OSI(\"%s\")\n", 3811 list.data[i]); 3812 } 3813 acpi_free_interfaces(&list); 3814 } 3815 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3816 for (i = 0; i < list.num; i++) { 3817 status = AcpiRemoveInterface(list.data[i]); 3818 if (ACPI_FAILURE(status)) 3819 device_printf(dev, 3820 "failed to remove _OSI(\"%s\"): %s\n", 3821 list.data[i], AcpiFormatException(status)); 3822 else if (bootverbose) 3823 device_printf(dev, "removed _OSI(\"%s\")\n", 3824 list.data[i]); 3825 } 3826 acpi_free_interfaces(&list); 3827 } 3828 } 3829 3830 static int 3831 acpi_pm_func(u_long cmd, void *arg, ...) 3832 { 3833 int state, acpi_state; 3834 int error; 3835 struct acpi_softc *sc; 3836 __va_list ap; 3837 3838 error = 0; 3839 switch (cmd) { 3840 case POWER_CMD_SUSPEND: 3841 sc = (struct acpi_softc *)arg; 3842 if (sc == NULL) { 3843 error = EINVAL; 3844 goto out; 3845 } 3846 3847 __va_start(ap, arg); 3848 state = __va_arg(ap, int); 3849 __va_end(ap); 3850 3851 switch (state) { 3852 case POWER_SLEEP_STATE_STANDBY: 3853 acpi_state = sc->acpi_standby_sx; 3854 break; 3855 case POWER_SLEEP_STATE_SUSPEND: 3856 acpi_state = sc->acpi_suspend_sx; 3857 break; 3858 case POWER_SLEEP_STATE_HIBERNATE: 3859 acpi_state = ACPI_STATE_S4; 3860 break; 3861 default: 3862 error = EINVAL; 3863 goto out; 3864 } 3865 3866 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3867 error = ENXIO; 3868 break; 3869 default: 3870 error = EINVAL; 3871 goto out; 3872 } 3873 3874 out: 3875 return (error); 3876 } 3877 3878 static void 3879 acpi_pm_register(void *arg) 3880 { 3881 if (!cold || resource_disabled("acpi", 0)) 3882 return; 3883 3884 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3885 } 3886 3887 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3888