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 if (adinfo) 920 AcpiOsFree(adinfo); 921 } 922 return (0); 923 } 924 925 /* 926 * Handle per-device ivars 927 */ 928 static int 929 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 930 { 931 struct acpi_device *ad; 932 933 if ((ad = device_get_ivars(child)) == NULL) { 934 device_printf(child, "device has no ivars\n"); 935 return (ENOENT); 936 } 937 938 /* ACPI and ISA compatibility ivars */ 939 switch(index) { 940 case ACPI_IVAR_HANDLE: 941 *(ACPI_HANDLE *)result = ad->ad_handle; 942 break; 943 case ACPI_IVAR_MAGIC: 944 *result = ad->ad_magic; 945 break; 946 case ACPI_IVAR_PRIVATE: 947 *(void **)result = ad->ad_private; 948 break; 949 case ACPI_IVAR_FLAGS: 950 *(int *)result = ad->ad_flags; 951 break; 952 case ACPI_IVAR_RECHECK: 953 *(int *)result = ad->ad_recheck; 954 break; 955 case ISA_IVAR_VENDORID: 956 case ISA_IVAR_SERIAL: 957 case ISA_IVAR_COMPATID: 958 *(int *)result = -1; 959 break; 960 case ISA_IVAR_LOGICALID: 961 *(int *)result = acpi_isa_get_logicalid(child); 962 break; 963 default: 964 return (ENOENT); 965 } 966 967 return (0); 968 } 969 970 static int 971 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 972 { 973 struct acpi_device *ad; 974 975 if ((ad = device_get_ivars(child)) == NULL) { 976 device_printf(child, "device has no ivars\n"); 977 return (ENOENT); 978 } 979 980 switch(index) { 981 case ACPI_IVAR_HANDLE: 982 ad->ad_handle = (ACPI_HANDLE)value; 983 break; 984 case ACPI_IVAR_MAGIC: 985 ad->ad_magic = value; 986 break; 987 case ACPI_IVAR_PRIVATE: 988 ad->ad_private = (void *)value; 989 break; 990 case ACPI_IVAR_FLAGS: 991 ad->ad_flags = (int)value; 992 break; 993 case ACPI_IVAR_RECHECK: 994 ad->ad_recheck = (int)value; 995 break; 996 default: 997 panic("bad ivar write request (%d)", index); 998 return (ENOENT); 999 } 1000 1001 return (0); 1002 } 1003 1004 /* 1005 * Handle child resource allocation/removal 1006 */ 1007 static struct resource_list * 1008 acpi_get_rlist(device_t dev, device_t child) 1009 { 1010 struct acpi_device *ad; 1011 1012 ad = device_get_ivars(child); 1013 return (&ad->ad_rl); 1014 } 1015 1016 /* 1017 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 1018 * duplicates, we merge any in the sysresource attach routine. 1019 */ 1020 static int 1021 acpi_sysres_alloc(device_t dev) 1022 { 1023 struct resource *res; 1024 struct resource_list *rl; 1025 struct resource_list_entry *rle; 1026 struct rman *rm; 1027 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 1028 device_t *children; 1029 int child_count, i; 1030 /* 1031 * Probe/attach any sysresource devices. This would be unnecessary if we 1032 * had multi-pass probe/attach. 1033 */ 1034 if (device_get_children(dev, &children, &child_count) != 0) 1035 return (ENXIO); 1036 for (i = 0; i < child_count; i++) { 1037 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 1038 device_probe_and_attach(children[i]); 1039 } 1040 kfree(children, M_TEMP); 1041 1042 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 1043 if(!rl) 1044 return 0; 1045 SLIST_FOREACH(rle, rl, link) { 1046 if (rle->res != NULL) { 1047 device_printf(dev, "duplicate resource for %lx\n", rle->start); 1048 continue; 1049 } 1050 1051 /* Only memory and IO resources are valid here. */ 1052 switch (rle->type) { 1053 case SYS_RES_IOPORT: 1054 rm = &acpi_rman_io; 1055 break; 1056 case SYS_RES_MEMORY: 1057 rm = &acpi_rman_mem; 1058 break; 1059 default: 1060 continue; 1061 } 1062 1063 /* Pre-allocate resource and add to our rman pool. */ 1064 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1065 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1066 0, -1); 1067 if (res != NULL) { 1068 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1069 rle->res = res; 1070 } else 1071 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1072 rle->start, rle->count, rle->type); 1073 } 1074 return (0); 1075 } 1076 1077 static struct resource * 1078 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1079 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1080 { 1081 ACPI_RESOURCE ares; 1082 struct acpi_device *ad = device_get_ivars(child); 1083 struct resource_list *rl = &ad->ad_rl; 1084 struct resource_list_entry *rle; 1085 struct resource *res; 1086 struct rman *rm; 1087 1088 res = NULL; 1089 1090 /* We only handle memory and IO resources through rman. */ 1091 switch (type) { 1092 case SYS_RES_IOPORT: 1093 rm = &acpi_rman_io; 1094 break; 1095 case SYS_RES_MEMORY: 1096 rm = &acpi_rman_mem; 1097 break; 1098 default: 1099 rm = NULL; 1100 } 1101 1102 ACPI_SERIAL_BEGIN(acpi); 1103 1104 /* 1105 * If this is an allocation of the "default" range for a given RID, and 1106 * we know what the resources for this device are (i.e., they're on the 1107 * child's resource list), use those start/end values. 1108 */ 1109 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1110 rle = resource_list_find(rl, type, *rid); 1111 if (rle == NULL) 1112 goto out; 1113 start = rle->start; 1114 end = rle->end; 1115 count = rle->count; 1116 cpuid = rle->cpuid; 1117 } 1118 1119 /* 1120 * If this is an allocation of a specific range, see if we can satisfy 1121 * the request from our system resource regions. If we can't, pass the 1122 * request up to the parent. 1123 */ 1124 if (start + count - 1 == end && rm != NULL) 1125 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1126 child); 1127 if (res == NULL) { 1128 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1129 start, end, count, flags, cpuid); 1130 } else { 1131 rman_set_rid(res, *rid); 1132 1133 /* If requested, activate the resource using the parent's method. */ 1134 if (flags & RF_ACTIVE) 1135 if (bus_activate_resource(child, type, *rid, res) != 0) { 1136 rman_release_resource(res); 1137 res = NULL; 1138 goto out; 1139 } 1140 } 1141 1142 if (res != NULL && device_get_parent(child) == bus) 1143 switch (type) { 1144 case SYS_RES_IRQ: 1145 /* 1146 * Since bus_config_intr() takes immediate effect, we cannot 1147 * configure the interrupt associated with a device when we 1148 * parse the resources but have to defer it until a driver 1149 * actually allocates the interrupt via bus_alloc_resource(). 1150 * 1151 * NB: Lookup failure is fine, since the device may add its 1152 * own interrupt resources, e.g. MSI or MSI-X. 1153 */ 1154 if (ACPI_SUCCESS( 1155 acpi_lookup_irq_resource(child, *rid, res, &ares))) { 1156 acpi_config_intr(child, &ares); 1157 } else { 1158 kprintf("irq resource not found\n"); 1159 } 1160 break; 1161 } 1162 1163 out: 1164 ACPI_SERIAL_END(acpi); 1165 return (res); 1166 } 1167 1168 static int 1169 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1170 struct resource *r) 1171 { 1172 struct rman *rm; 1173 int ret; 1174 1175 /* We only handle memory and IO resources through rman. */ 1176 switch (type) { 1177 case SYS_RES_IOPORT: 1178 rm = &acpi_rman_io; 1179 break; 1180 case SYS_RES_MEMORY: 1181 rm = &acpi_rman_mem; 1182 break; 1183 default: 1184 rm = NULL; 1185 } 1186 1187 ACPI_SERIAL_BEGIN(acpi); 1188 1189 /* 1190 * If this resource belongs to one of our internal managers, 1191 * deactivate it and release it to the local pool. If it doesn't, 1192 * pass this request up to the parent. 1193 */ 1194 if (rm != NULL && rman_is_region_manager(r, rm)) { 1195 if (rman_get_flags(r) & RF_ACTIVE) { 1196 ret = bus_deactivate_resource(child, type, rid, r); 1197 if (ret != 0) 1198 goto out; 1199 } 1200 ret = rman_release_resource(r); 1201 } else 1202 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1203 1204 out: 1205 ACPI_SERIAL_END(acpi); 1206 return (ret); 1207 } 1208 1209 static void 1210 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1211 { 1212 struct resource_list *rl; 1213 1214 rl = acpi_get_rlist(bus, child); 1215 resource_list_delete(rl, type, rid); 1216 } 1217 1218 /* Allocate an IO port or memory resource, given its GAS. */ 1219 int 1220 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1221 struct resource **res, u_int flags) 1222 { 1223 int error, res_type; 1224 1225 error = ENOMEM; 1226 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1227 return (EINVAL); 1228 1229 /* We only support memory and IO spaces. */ 1230 switch (gas->SpaceId) { 1231 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1232 res_type = SYS_RES_MEMORY; 1233 break; 1234 case ACPI_ADR_SPACE_SYSTEM_IO: 1235 res_type = SYS_RES_IOPORT; 1236 break; 1237 default: 1238 return (EOPNOTSUPP); 1239 } 1240 1241 /* 1242 * If the register width is less than 8, assume the BIOS author means 1243 * it is a bit field and just allocate a byte. 1244 */ 1245 if (gas->BitWidth && gas->BitWidth < 8) 1246 gas->BitWidth = 8; 1247 1248 /* Validate the address after we're sure we support the space. */ 1249 if (gas->Address == 0 || gas->BitWidth == 0) 1250 return (EINVAL); 1251 1252 bus_set_resource(dev, res_type, *rid, gas->Address, 1253 gas->BitWidth / 8, -1); 1254 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1255 if (*res != NULL) { 1256 *type = res_type; 1257 error = 0; 1258 } else 1259 bus_delete_resource(dev, res_type, *rid); 1260 1261 return (error); 1262 } 1263 1264 ACPI_STATUS 1265 acpi_eval_osc(device_t dev, ACPI_HANDLE handle, const char *uuidstr, 1266 int revision, uint32_t *buf, int count) 1267 { 1268 ACPI_BUFFER retbuf = { ACPI_ALLOCATE_BUFFER, NULL }; 1269 ACPI_OBJECT_LIST arglist; 1270 ACPI_OBJECT arg[4]; 1271 ACPI_OBJECT *retobj; 1272 ACPI_STATUS status; 1273 struct uuid uuid; 1274 uint32_t error; 1275 uint8_t oscuuid[ACPI_UUID_LENGTH]; 1276 int i; 1277 1278 if (parse_uuid(uuidstr, &uuid) != 0) 1279 return (AE_ERROR); 1280 le_uuid_enc(oscuuid, &uuid); 1281 1282 arglist.Pointer = arg; 1283 arglist.Count = 4; 1284 arg[0].Type = ACPI_TYPE_BUFFER; 1285 arg[0].Buffer.Length = ACPI_UUID_LENGTH; 1286 arg[0].Buffer.Pointer = oscuuid; /* UUID */ 1287 arg[1].Type = ACPI_TYPE_INTEGER; 1288 arg[1].Integer.Value = revision; /* revision */ 1289 arg[2].Type = ACPI_TYPE_INTEGER; 1290 arg[2].Integer.Value = count; /* # of cap integers */ 1291 arg[3].Type = ACPI_TYPE_BUFFER; 1292 arg[3].Buffer.Length = count * sizeof(uint32_t); /* capabilities buffer */ 1293 arg[3].Buffer.Pointer = (uint8_t *)buf; 1294 1295 status = AcpiEvaluateObject(handle, "_OSC", &arglist, &retbuf); 1296 if (ACPI_FAILURE(status)) 1297 goto done; 1298 retobj = retbuf.Pointer; 1299 error = ((uint32_t *)retobj->Buffer.Pointer)[0] & ACPI_OSC_ERRMASK; 1300 if (error == 0) 1301 goto done; 1302 status = AE_ERROR; 1303 if (error & ACPI_OSCERR_FAILURE) 1304 device_printf(dev, "_OSC unable to process request\n"); 1305 if (error & ACPI_OSCERR_BADUUID) 1306 device_printf(dev, "_OSC unrecognized UUID (%s)\n", uuidstr); 1307 if (error & ACPI_OSCERR_BADREV) 1308 device_printf(dev, "_OSC unrecognized revision ID (%d)\n", revision); 1309 if (error & ACPI_OSCERR_CAPSMASKED) { 1310 if ((buf[0] & ACPI_OSC_QUERY_SUPPORT) == 0) { 1311 for (i = 1; i < count; i++) { 1312 device_printf(dev, 1313 "_OSC capabilities have been masked: buf[%d]:%#x\n", 1314 i, buf[i] & ~((uint32_t *)retobj->Buffer.Pointer)[i]); 1315 } 1316 status = AE_SUPPORT; 1317 } else { 1318 status = AE_OK; 1319 } 1320 } 1321 if (buf[0] & ACPI_OSC_QUERY_SUPPORT) { 1322 for (i = 0; i < count; i++) 1323 buf[i] = ((uint32_t *)retobj->Buffer.Pointer)[i]; 1324 } 1325 1326 done: 1327 if (retbuf.Pointer != NULL) 1328 AcpiOsFree(retbuf.Pointer); 1329 return (status); 1330 } 1331 1332 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1333 static uint32_t 1334 acpi_isa_get_logicalid(device_t dev) 1335 { 1336 ACPI_DEVICE_INFO *devinfo; 1337 ACPI_HANDLE h; 1338 uint32_t pnpid; 1339 1340 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1341 1342 devinfo = NULL; 1343 pnpid = 0; 1344 1345 /* Fetch and validate the HID. */ 1346 if ((h = acpi_get_handle(dev)) == NULL || 1347 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 1348 goto out; 1349 1350 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1351 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1352 1353 out: 1354 if (devinfo) 1355 AcpiOsFree(devinfo); 1356 return_VALUE (pnpid); 1357 } 1358 1359 static int 1360 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1361 { 1362 ACPI_DEVICE_INFO *devinfo; 1363 ACPI_HANDLE h; 1364 uint32_t *pnpid; 1365 int valid, i; 1366 1367 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1368 1369 devinfo = NULL; 1370 pnpid = cids; 1371 valid = 0; 1372 1373 /* Fetch and validate the CID */ 1374 if ((h = acpi_get_handle(dev)) == NULL || 1375 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)) || 1376 (devinfo->Valid & ACPI_VALID_CID) == 0) 1377 goto out; 1378 1379 if (devinfo->CompatibleIdList.Count < count) 1380 count = devinfo->CompatibleIdList.Count; 1381 for (i = 0; i < count; i++) { 1382 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1383 continue; 1384 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1385 valid++; 1386 } 1387 1388 out: 1389 if (devinfo) 1390 AcpiOsFree(devinfo); 1391 return_VALUE (valid); 1392 } 1393 1394 static char * 1395 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1396 { 1397 ACPI_HANDLE h; 1398 int i; 1399 1400 h = acpi_get_handle(dev); 1401 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1402 return (NULL); 1403 1404 /* Try to match one of the array of IDs with a HID or CID. */ 1405 for (i = 0; ids[i] != NULL; i++) { 1406 if (acpi_MatchHid(h, ids[i])) 1407 return (ids[i]); 1408 } 1409 return (NULL); 1410 } 1411 1412 static ACPI_STATUS 1413 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1414 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1415 { 1416 ACPI_HANDLE h; 1417 1418 if (dev == NULL) 1419 h = ACPI_ROOT_OBJECT; 1420 else if ((h = acpi_get_handle(dev)) == NULL) 1421 return (AE_BAD_PARAMETER); 1422 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1423 } 1424 1425 static int 1426 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1427 { 1428 struct acpi_softc *sc; 1429 ACPI_HANDLE handle; 1430 ACPI_STATUS status; 1431 char sxd[8]; 1432 int error; 1433 1434 sc = device_get_softc(bus); 1435 handle = acpi_get_handle(dev); 1436 1437 /* 1438 * XXX If we find these devices, don't try to power them down. 1439 * The serial and IRDA ports on my T23 hang the system when 1440 * set to D3 and it appears that such legacy devices may 1441 * need special handling in their drivers. 1442 */ 1443 if (handle == NULL || 1444 acpi_MatchHid(handle, "PNP0500") || 1445 acpi_MatchHid(handle, "PNP0501") || 1446 acpi_MatchHid(handle, "PNP0502") || 1447 acpi_MatchHid(handle, "PNP0510") || 1448 acpi_MatchHid(handle, "PNP0511")) 1449 return (ENXIO); 1450 1451 /* 1452 * Override next state with the value from _SxD, if present. If no 1453 * dstate argument was provided, don't fetch the return value. 1454 */ 1455 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1456 if (dstate) 1457 status = acpi_GetInteger(handle, sxd, dstate); 1458 else 1459 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1460 1461 switch (status) { 1462 case AE_OK: 1463 error = 0; 1464 break; 1465 case AE_NOT_FOUND: 1466 error = ESRCH; 1467 break; 1468 default: 1469 error = ENXIO; 1470 break; 1471 } 1472 1473 return (error); 1474 } 1475 1476 /* Callback arg for our implementation of walking the namespace. */ 1477 struct acpi_device_scan_ctx { 1478 acpi_scan_cb_t user_fn; 1479 void *arg; 1480 ACPI_HANDLE parent; 1481 }; 1482 1483 static ACPI_STATUS 1484 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1485 { 1486 struct acpi_device_scan_ctx *ctx; 1487 device_t dev, old_dev; 1488 ACPI_STATUS status; 1489 ACPI_OBJECT_TYPE type; 1490 1491 /* 1492 * Skip this device if we think we'll have trouble with it or it is 1493 * the parent where the scan began. 1494 */ 1495 ctx = (struct acpi_device_scan_ctx *)arg; 1496 if (acpi_avoid(h) || h == ctx->parent) 1497 return (AE_OK); 1498 1499 /* If this is not a valid device type (e.g., a method), skip it. */ 1500 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1501 return (AE_OK); 1502 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1503 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1504 return (AE_OK); 1505 1506 /* 1507 * Call the user function with the current device. If it is unchanged 1508 * afterwards, return. Otherwise, we update the handle to the new dev. 1509 */ 1510 old_dev = acpi_get_device(h); 1511 dev = old_dev; 1512 status = ctx->user_fn(h, &dev, level, ctx->arg); 1513 if (ACPI_FAILURE(status) || old_dev == dev) 1514 return (status); 1515 1516 /* Remove the old child and its connection to the handle. */ 1517 if (old_dev != NULL) { 1518 device_delete_child(device_get_parent(old_dev), old_dev); 1519 AcpiDetachData(h, acpi_fake_objhandler); 1520 } 1521 1522 /* Recreate the handle association if the user created a device. */ 1523 if (dev != NULL) 1524 AcpiAttachData(h, acpi_fake_objhandler, dev); 1525 1526 return (AE_OK); 1527 } 1528 1529 static ACPI_STATUS 1530 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1531 acpi_scan_cb_t user_fn, void *arg) 1532 { 1533 ACPI_HANDLE h; 1534 struct acpi_device_scan_ctx ctx; 1535 1536 if (acpi_disabled("children")) 1537 return (AE_OK); 1538 1539 if (dev == NULL) 1540 h = ACPI_ROOT_OBJECT; 1541 else if ((h = acpi_get_handle(dev)) == NULL) 1542 return (AE_BAD_PARAMETER); 1543 ctx.user_fn = user_fn; 1544 ctx.arg = arg; 1545 ctx.parent = h; 1546 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1547 acpi_device_scan_cb, NULL, &ctx, NULL)); 1548 } 1549 1550 /* 1551 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1552 * device power states since it's close enough to ACPI. 1553 */ 1554 static int 1555 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1556 { 1557 ACPI_HANDLE h; 1558 ACPI_STATUS status; 1559 int error; 1560 1561 error = 0; 1562 h = acpi_get_handle(child); 1563 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1564 return (EINVAL); 1565 if (h == NULL) 1566 return (0); 1567 1568 /* Ignore errors if the power methods aren't present. */ 1569 status = acpi_pwr_switch_consumer(h, state); 1570 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1571 && status != AE_BAD_PARAMETER) 1572 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1573 state, acpi_name(h), AcpiFormatException(status)); 1574 1575 return (error); 1576 } 1577 1578 static int 1579 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1580 { 1581 int result, cid_count, i; 1582 uint32_t lid, cids[8]; 1583 1584 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1585 1586 /* 1587 * ISA-style drivers attached to ACPI may persist and 1588 * probe manually if we return ENOENT. We never want 1589 * that to happen, so don't ever return it. 1590 */ 1591 result = ENXIO; 1592 1593 /* Scan the supplied IDs for a match */ 1594 lid = acpi_isa_get_logicalid(child); 1595 cid_count = acpi_isa_get_compatid(child, cids, 8); 1596 while (ids && ids->ip_id) { 1597 if (lid == ids->ip_id) { 1598 result = 0; 1599 goto out; 1600 } 1601 for (i = 0; i < cid_count; i++) { 1602 if (cids[i] == ids->ip_id) { 1603 result = 0; 1604 goto out; 1605 } 1606 } 1607 ids++; 1608 } 1609 1610 out: 1611 if (result == 0 && ids->ip_desc) 1612 device_set_desc(child, ids->ip_desc); 1613 1614 return_VALUE (result); 1615 } 1616 1617 /* 1618 * Look for a MCFG table. If it is present, use the settings for 1619 * domain (segment) 0 to setup PCI config space access via the memory 1620 * map. 1621 */ 1622 static void 1623 acpi_enable_pcie(void) 1624 { 1625 ACPI_TABLE_HEADER *hdr; 1626 ACPI_MCFG_ALLOCATION *alloc, *end; 1627 ACPI_STATUS status; 1628 1629 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1630 if (ACPI_FAILURE(status)) 1631 return; 1632 1633 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1634 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1635 while (alloc < end) { 1636 if (alloc->PciSegment == 0) { 1637 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1638 alloc->EndBusNumber); 1639 return; 1640 } 1641 alloc++; 1642 } 1643 } 1644 1645 /* 1646 * Scan all of the ACPI namespace and attach child devices. 1647 * 1648 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1649 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1650 * However, in violation of the spec, some systems place their PCI link 1651 * devices in \, so we have to walk the whole namespace. We check the 1652 * type of namespace nodes, so this should be ok. 1653 */ 1654 static void 1655 acpi_probe_children(device_t bus) 1656 { 1657 device_t *children; 1658 int cnt; 1659 1660 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1661 1662 /* 1663 * Scan the namespace and insert placeholders for all the devices that 1664 * we find. We also probe/attach any early devices. 1665 * 1666 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1667 * we want to create nodes for all devices, not just those that are 1668 * currently present. (This assumes that we don't want to create/remove 1669 * devices as they appear, which might be smarter.) 1670 */ 1671 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1672 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1673 acpi_probe_child, NULL, bus, NULL); 1674 /* This gets us all the children that we added from the ACPI namespace. */ 1675 device_get_children(bus, &children, &cnt); 1676 1677 /* Pre-allocate resources for our rman from any sysresource devices. */ 1678 acpi_sysres_alloc(bus); 1679 /* Create any static children by calling device identify methods. */ 1680 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1681 bus_generic_probe(bus); 1682 1683 /* Probe/attach all children, created staticly and from the namespace. */ 1684 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1685 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+2); 1686 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1687 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI+1); 1688 /* Re-check device presence for previously disabled devices. */ 1689 acpi_reprobe_children(bus, children, cnt); 1690 kfree(children, M_TEMP); 1691 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "third bus_generic_attach\n")); 1692 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1693 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fourth bus_generic_attach\n")); 1694 bus_generic_attach_gpri(bus, KOBJ_GPRI_ACPI); 1695 1696 /* 1697 * Some of these children may have attached others as part of their attach 1698 * process (eg. the root PCI bus driver), so rescan. 1699 */ 1700 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "fifth bus_generic_attach\n")); 1701 bus_generic_attach(bus); 1702 1703 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "sixth bus_generic_attach\n")); 1704 bus_generic_attach(bus); 1705 1706 /* Attach wake sysctls. */ 1707 acpi_wake_sysctl_walk(bus); 1708 1709 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1710 return_VOID; 1711 } 1712 1713 /* 1714 * Determine the probe order for a given device. 1715 */ 1716 static void 1717 acpi_probe_order(ACPI_HANDLE handle, int *order) 1718 { 1719 ACPI_OBJECT_TYPE type; 1720 1721 /* 1722 * 1. I/O port and memory system resource holders 1723 * 2. Embedded controllers (to handle early accesses) 1724 * 3. PCI Link Devices 1725 * 100000. CPUs 1726 */ 1727 AcpiGetType(handle, &type); 1728 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1729 *order = 1; 1730 else if (acpi_MatchHid(handle, "PNP0C09")) 1731 *order = 2; 1732 else if (acpi_MatchHid(handle, "PNP0C0F")) 1733 *order = 3; 1734 else if (type == ACPI_TYPE_PROCESSOR) 1735 *order = 100000; 1736 } 1737 1738 /* 1739 * Flag a device as disabled, because it isn't present according to the 1740 * _STA method. We set the recheck instance-variable, to make sure that we 1741 * recheck the device presence at a later point. 1742 */ 1743 static void 1744 acpi_disable_not_present(device_t child) 1745 { 1746 device_disable(child); 1747 acpi_set_recheck(child, 1); 1748 } 1749 1750 /* 1751 * This rechecks the device presence for all the devices which were disabled 1752 * using acpi_disable_not_present(). 1753 */ 1754 static void 1755 acpi_reprobe_children(device_t bus, device_t *children, int cnt) 1756 { 1757 int i; 1758 1759 for (i = 0; i < cnt; i++) { 1760 device_t dev = children[i]; 1761 1762 if (device_is_enabled(dev)) 1763 continue; 1764 1765 if (acpi_get_recheck(dev)) { 1766 if (acpi_DeviceIsPresent(dev)) { 1767 acpi_set_recheck(dev, 0); 1768 device_enable(dev); 1769 /* 1770 * Currently we parse the resources for every 1771 * device at the first time, when we see 1772 * that it is present. 1773 */ 1774 acpi_parse_resources(dev, acpi_get_handle(dev), 1775 &acpi_res_parse_set, NULL); 1776 } 1777 } 1778 } 1779 } 1780 1781 /* 1782 * Evaluate a child device and determine whether we might attach a device to 1783 * it. 1784 */ 1785 static ACPI_STATUS 1786 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1787 { 1788 struct acpi_prw_data prw; 1789 ACPI_OBJECT_TYPE type; 1790 ACPI_HANDLE h; 1791 device_t bus, child; 1792 int order; 1793 char *handle_str; 1794 1795 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1796 1797 if (acpi_disabled("children")) 1798 return_ACPI_STATUS (AE_OK); 1799 1800 /* Skip this device if we think we'll have trouble with it. */ 1801 if (acpi_avoid(handle)) 1802 return_ACPI_STATUS (AE_OK); 1803 1804 bus = (device_t)context; 1805 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1806 handle_str = acpi_name(handle); 1807 switch (type) { 1808 case ACPI_TYPE_DEVICE: 1809 /* 1810 * Since we scan from \, be sure to skip system scope objects. 1811 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1812 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1813 * during the intialization and \_TZ_ is to support Notify() on it. 1814 */ 1815 if (strcmp(handle_str, "\\_SB_") == 0 || 1816 strcmp(handle_str, "\\_TZ_") == 0) 1817 break; 1818 1819 if (acpi_parse_prw(handle, &prw) == 0) 1820 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1821 1822 /* FALLTHROUGH */ 1823 case ACPI_TYPE_PROCESSOR: 1824 case ACPI_TYPE_THERMAL: 1825 case ACPI_TYPE_POWER: 1826 /* 1827 * Create a placeholder device for this node. Sort the 1828 * placeholder so that the probe/attach passes will run 1829 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1830 * are reserved for special objects (i.e., system 1831 * resources). CPU devices have a very high order to 1832 * ensure they are probed after other devices. 1833 */ 1834 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1835 order = level * 10 + 100; 1836 acpi_probe_order(handle, &order); 1837 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1838 if (child == NULL) 1839 break; 1840 1841 /* Associate the handle with the device_t and vice versa. */ 1842 acpi_set_handle(child, handle); 1843 AcpiAttachData(handle, acpi_fake_objhandler, child); 1844 1845 /* 1846 * Check that the device is present. If it's not present, 1847 * leave it disabled (so that we have a device_t attached to 1848 * the handle, but we don't probe it). 1849 * 1850 * XXX PCI link devices sometimes report "present" but not 1851 * "functional" (i.e. if disabled). Go ahead and probe them 1852 * anyway since we may enable them later. 1853 */ 1854 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1855 /* Never disable PCI link devices. */ 1856 if (acpi_MatchHid(handle, "PNP0C0F")) 1857 break; 1858 /* 1859 * Docking stations should remain enabled since the system 1860 * may be undocked at boot. 1861 */ 1862 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1863 break; 1864 1865 acpi_disable_not_present(child); 1866 break; 1867 } 1868 1869 /* 1870 * Get the device's resource settings and attach them. 1871 * Note that if the device has _PRS but no _CRS, we need 1872 * to decide when it's appropriate to try to configure the 1873 * device. Ignore the return value here; it's OK for the 1874 * device not to have any resources. 1875 */ 1876 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1877 break; 1878 } 1879 } 1880 1881 return_ACPI_STATUS (AE_OK); 1882 } 1883 1884 /* 1885 * AcpiAttachData() requires an object handler but never uses it. This is a 1886 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1887 */ 1888 void 1889 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1890 { 1891 } 1892 1893 static void 1894 acpi_shutdown_final(void *arg, int howto) 1895 { 1896 struct acpi_softc *sc; 1897 ACPI_STATUS status; 1898 1899 /* 1900 * XXX Shutdown code should only run on the BSP (cpuid 0). 1901 * Some chipsets do not power off the system correctly if called from 1902 * an AP. 1903 */ 1904 sc = arg; 1905 if ((howto & RB_POWEROFF) != 0) { 1906 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1907 if (ACPI_FAILURE(status)) { 1908 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 1909 AcpiFormatException(status)); 1910 return; 1911 } 1912 device_printf(sc->acpi_dev, "Powering system off\n"); 1913 ACPI_DISABLE_IRQS(); 1914 status = AcpiEnterSleepState(ACPI_STATE_S5); 1915 if (ACPI_FAILURE(status)) { 1916 device_printf(sc->acpi_dev, "power-off failed - %s\n", 1917 AcpiFormatException(status)); 1918 } else { 1919 DELAY(1000000); 1920 device_printf(sc->acpi_dev, "power-off failed - timeout\n"); 1921 } 1922 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1923 /* Reboot using the reset register. */ 1924 status = AcpiReset(); 1925 if (ACPI_FAILURE(status)) { 1926 if (status != AE_NOT_EXIST) 1927 device_printf(sc->acpi_dev, "reset failed - %s\n", 1928 AcpiFormatException(status)); 1929 } else { 1930 DELAY(1000000); 1931 device_printf(sc->acpi_dev, "reset failed - timeout\n"); 1932 } 1933 } else if (sc->acpi_do_disable && panicstr == NULL) { 1934 /* 1935 * Only disable ACPI if the user requested. On some systems, writing 1936 * the disable value to SMI_CMD hangs the system. 1937 */ 1938 device_printf(sc->acpi_dev, "Shutting down\n"); 1939 AcpiTerminate(); 1940 } 1941 } 1942 1943 static void 1944 acpi_enable_fixed_events(struct acpi_softc *sc) 1945 { 1946 static int first_time = 1; 1947 1948 /* Enable and clear fixed events and install handlers. */ 1949 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1950 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1951 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1952 acpi_event_power_button_sleep, sc); 1953 if (first_time) 1954 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1955 } 1956 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1957 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1958 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1959 acpi_event_sleep_button_sleep, sc); 1960 if (first_time) 1961 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1962 } 1963 1964 first_time = 0; 1965 } 1966 1967 /* 1968 * Returns true if the device is actually present and should 1969 * be attached to. This requires the present, enabled, UI-visible 1970 * and diagnostics-passed bits to be set. 1971 */ 1972 BOOLEAN 1973 acpi_DeviceIsPresent(device_t dev) 1974 { 1975 ACPI_HANDLE h; 1976 UINT32 s; 1977 ACPI_STATUS status; 1978 1979 h = acpi_get_handle(dev); 1980 if (h == NULL) 1981 return (FALSE); 1982 status = acpi_GetInteger(h, "_STA", &s); 1983 1984 /* 1985 * If no _STA method or if it failed, then assume that 1986 * the device is present. 1987 */ 1988 if (ACPI_FAILURE(status)) 1989 return (TRUE); 1990 1991 return (ACPI_DEVICE_PRESENT(s) ? TRUE : FALSE); 1992 } 1993 1994 /* 1995 * Returns true if the battery is actually present and inserted. 1996 */ 1997 BOOLEAN 1998 acpi_BatteryIsPresent(device_t dev) 1999 { 2000 ACPI_HANDLE h; 2001 UINT32 s; 2002 ACPI_STATUS status; 2003 2004 h = acpi_get_handle(dev); 2005 if (h == NULL) 2006 return (FALSE); 2007 status = acpi_GetInteger(h, "_STA", &s); 2008 2009 /* 2010 * If no _STA method or if it failed, then assume that 2011 * the device is present. 2012 */ 2013 if (ACPI_FAILURE(status)) 2014 return (TRUE); 2015 2016 return (ACPI_BATTERY_PRESENT(s) ? TRUE : FALSE); 2017 } 2018 2019 /* 2020 * Match a HID string against a handle 2021 */ 2022 BOOLEAN 2023 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 2024 { 2025 ACPI_DEVICE_INFO *devinfo; 2026 int ret, i; 2027 2028 ret = FALSE; 2029 if (hid == NULL || h == NULL || 2030 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2031 return (ret); 2032 2033 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 2034 strcmp(hid, devinfo->HardwareId.String) == 0) 2035 ret = TRUE; 2036 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 2037 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 2038 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 2039 ret = TRUE; 2040 break; 2041 } 2042 } 2043 } 2044 2045 AcpiOsFree(devinfo); 2046 return (ret); 2047 } 2048 2049 /* 2050 * Match a UID string against a handle 2051 */ 2052 BOOLEAN 2053 acpi_MatchUid(ACPI_HANDLE h, const char *uid) 2054 { 2055 ACPI_DEVICE_INFO *devinfo; 2056 int ret; 2057 2058 ret = FALSE; 2059 if (uid == NULL || h == NULL || 2060 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo))) 2061 return (ret); 2062 2063 if ((devinfo->Valid & ACPI_VALID_UID) != 0 && 2064 strcmp(uid, devinfo->UniqueId.String) == 0) 2065 ret = TRUE; 2066 2067 AcpiOsFree(devinfo); 2068 return (ret); 2069 } 2070 2071 /* 2072 * Return the handle of a named object within our scope, ie. that of (parent) 2073 * or one if its parents. 2074 */ 2075 ACPI_STATUS 2076 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 2077 { 2078 ACPI_HANDLE r; 2079 ACPI_STATUS status; 2080 2081 /* Walk back up the tree to the root */ 2082 for (;;) { 2083 status = AcpiGetHandle(parent, path, &r); 2084 if (ACPI_SUCCESS(status)) { 2085 *result = r; 2086 return (AE_OK); 2087 } 2088 /* XXX Return error here? */ 2089 if (status != AE_NOT_FOUND) 2090 return (AE_OK); 2091 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 2092 return (AE_NOT_FOUND); 2093 parent = r; 2094 } 2095 } 2096 2097 /* 2098 * Allocate a buffer with a preset data size. 2099 */ 2100 ACPI_BUFFER * 2101 acpi_AllocBuffer(int size) 2102 { 2103 ACPI_BUFFER *buf; 2104 2105 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 2106 return (NULL); 2107 buf->Length = size; 2108 buf->Pointer = (void *)(buf + 1); 2109 return (buf); 2110 } 2111 2112 ACPI_STATUS 2113 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 2114 { 2115 ACPI_OBJECT arg1; 2116 ACPI_OBJECT_LIST args; 2117 2118 arg1.Type = ACPI_TYPE_INTEGER; 2119 arg1.Integer.Value = number; 2120 args.Count = 1; 2121 args.Pointer = &arg1; 2122 2123 return (AcpiEvaluateObject(handle, path, &args, NULL)); 2124 } 2125 2126 /* 2127 * Evaluate a path that should return an integer. 2128 */ 2129 ACPI_STATUS 2130 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 2131 { 2132 ACPI_STATUS status; 2133 ACPI_BUFFER buf; 2134 ACPI_OBJECT param; 2135 2136 if (handle == NULL) 2137 handle = ACPI_ROOT_OBJECT; 2138 2139 /* 2140 * Assume that what we've been pointed at is an Integer object, or 2141 * a method that will return an Integer. 2142 */ 2143 buf.Pointer = ¶m; 2144 buf.Length = sizeof(param); 2145 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2146 if (ACPI_SUCCESS(status)) { 2147 if (param.Type == ACPI_TYPE_INTEGER) 2148 *number = param.Integer.Value; 2149 else 2150 status = AE_TYPE; 2151 } 2152 2153 /* 2154 * In some applications, a method that's expected to return an Integer 2155 * may instead return a Buffer (probably to simplify some internal 2156 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 2157 * convert it into an Integer as best we can. 2158 * 2159 * This is a hack. 2160 */ 2161 if (status == AE_BUFFER_OVERFLOW) { 2162 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 2163 status = AE_NO_MEMORY; 2164 } else { 2165 status = AcpiEvaluateObject(handle, path, NULL, &buf); 2166 if (ACPI_SUCCESS(status)) 2167 status = acpi_ConvertBufferToInteger(&buf, number); 2168 AcpiOsFree(buf.Pointer); 2169 } 2170 } 2171 return (status); 2172 } 2173 2174 ACPI_STATUS 2175 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 2176 { 2177 ACPI_OBJECT *p; 2178 UINT8 *val; 2179 int i; 2180 2181 p = (ACPI_OBJECT *)bufp->Pointer; 2182 if (p->Type == ACPI_TYPE_INTEGER) { 2183 *number = p->Integer.Value; 2184 return (AE_OK); 2185 } 2186 if (p->Type != ACPI_TYPE_BUFFER) 2187 return (AE_TYPE); 2188 if (p->Buffer.Length > sizeof(int)) 2189 return (AE_BAD_DATA); 2190 2191 *number = 0; 2192 val = p->Buffer.Pointer; 2193 for (i = 0; i < p->Buffer.Length; i++) 2194 *number += val[i] << (i * 8); 2195 return (AE_OK); 2196 } 2197 2198 /* 2199 * Iterate over the elements of an a package object, calling the supplied 2200 * function for each element. 2201 * 2202 * XXX possible enhancement might be to abort traversal on error. 2203 */ 2204 ACPI_STATUS 2205 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2206 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2207 { 2208 ACPI_OBJECT *comp; 2209 int i; 2210 2211 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2212 return (AE_BAD_PARAMETER); 2213 2214 /* Iterate over components */ 2215 i = 0; 2216 comp = pkg->Package.Elements; 2217 for (; i < pkg->Package.Count; i++, comp++) 2218 func(comp, arg); 2219 2220 return (AE_OK); 2221 } 2222 2223 /* 2224 * Find the (index)th resource object in a set. 2225 */ 2226 ACPI_STATUS 2227 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2228 { 2229 ACPI_RESOURCE *rp; 2230 int i; 2231 2232 rp = (ACPI_RESOURCE *)buf->Pointer; 2233 i = index; 2234 while (i-- > 0) { 2235 /* Range check */ 2236 if (rp > (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2237 return (AE_BAD_PARAMETER); 2238 2239 /* Check for terminator */ 2240 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2241 return (AE_NOT_FOUND); 2242 rp = ACPI_NEXT_RESOURCE(rp); 2243 } 2244 if (resp != NULL) 2245 *resp = rp; 2246 2247 return (AE_OK); 2248 } 2249 2250 /* 2251 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2252 * 2253 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2254 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2255 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2256 * resources. 2257 */ 2258 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2259 2260 ACPI_STATUS 2261 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2262 { 2263 ACPI_RESOURCE *rp; 2264 void *newp; 2265 2266 /* Initialise the buffer if necessary. */ 2267 if (buf->Pointer == NULL) { 2268 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2269 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2270 return (AE_NO_MEMORY); 2271 rp = (ACPI_RESOURCE *)buf->Pointer; 2272 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2273 rp->Length = ACPI_RS_SIZE_MIN; 2274 } 2275 if (res == NULL) 2276 return (AE_OK); 2277 2278 /* 2279 * Scan the current buffer looking for the terminator. 2280 * This will either find the terminator or hit the end 2281 * of the buffer and return an error. 2282 */ 2283 rp = (ACPI_RESOURCE *)buf->Pointer; 2284 for (;;) { 2285 /* Range check, don't go outside the buffer */ 2286 if (rp >= (ACPI_RESOURCE *)((uint8_t *)buf->Pointer + buf->Length)) 2287 return (AE_BAD_PARAMETER); 2288 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2289 break; 2290 rp = ACPI_NEXT_RESOURCE(rp); 2291 } 2292 2293 /* 2294 * Check the size of the buffer and expand if required. 2295 * 2296 * Required size is: 2297 * size of existing resources before terminator + 2298 * size of new resource and header + 2299 * size of terminator. 2300 * 2301 * Note that this loop should really only run once, unless 2302 * for some reason we are stuffing a *really* huge resource. 2303 */ 2304 while ((((uint8_t *)rp - (uint8_t *)buf->Pointer) + 2305 res->Length + ACPI_RS_SIZE_NO_DATA + 2306 ACPI_RS_SIZE_MIN) >= buf->Length) { 2307 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2308 return (AE_NO_MEMORY); 2309 bcopy(buf->Pointer, newp, buf->Length); 2310 rp = (ACPI_RESOURCE *)((uint8_t *)newp + 2311 ((uint8_t *)rp - (uint8_t *)buf->Pointer)); 2312 AcpiOsFree(buf->Pointer); 2313 buf->Pointer = newp; 2314 buf->Length += buf->Length; 2315 } 2316 2317 /* Insert the new resource. */ 2318 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2319 2320 /* And add the terminator. */ 2321 rp = ACPI_NEXT_RESOURCE(rp); 2322 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2323 rp->Length = ACPI_RS_SIZE_MIN; 2324 2325 return (AE_OK); 2326 } 2327 2328 /* 2329 * Set interrupt model. 2330 */ 2331 ACPI_STATUS 2332 acpi_SetIntrModel(int model) 2333 { 2334 2335 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2336 } 2337 2338 /* 2339 * DEPRECATED. This interface has serious deficiencies and will be 2340 * removed. 2341 * 2342 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2343 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2344 */ 2345 ACPI_STATUS 2346 acpi_SetSleepState(struct acpi_softc *sc, int state) 2347 { 2348 static int once; 2349 2350 if (!once) { 2351 device_printf(sc->acpi_dev, 2352 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2353 once = 1; 2354 } 2355 return (acpi_EnterSleepState(sc, state)); 2356 } 2357 2358 static void 2359 acpi_sleep_force(void *arg) 2360 { 2361 struct acpi_softc *sc; 2362 2363 sc = arg; 2364 device_printf(sc->acpi_dev, 2365 "suspend request timed out, forcing sleep now\n"); 2366 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2367 device_printf(sc->acpi_dev, "force sleep state S%d failed\n", 2368 sc->acpi_next_sstate); 2369 } 2370 2371 /* 2372 * Request that the system enter the given suspend state. All /dev/apm 2373 * devices and devd(8) will be notified. Userland then has a chance to 2374 * save state and acknowledge the request. The system sleeps once all 2375 * acks are in. 2376 */ 2377 int 2378 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2379 { 2380 #ifdef notyet 2381 struct apm_clone_data *clone; 2382 #endif 2383 2384 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2385 return (EINVAL); 2386 2387 /* S5 (soft-off) should be entered directly with no waiting. */ 2388 if (state == ACPI_STATE_S5) { 2389 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2390 return (0); 2391 else 2392 return (ENXIO); 2393 } 2394 2395 /* This platform does not support acpi suspend/resume. */ 2396 return (EOPNOTSUPP); 2397 2398 /* If a suspend request is already in progress, just return. */ 2399 ACPI_LOCK(acpi); 2400 if (sc->acpi_next_sstate != 0) { 2401 ACPI_UNLOCK(acpi); 2402 return (0); 2403 } 2404 2405 /* Record the pending state and notify all apm devices. */ 2406 sc->acpi_next_sstate = state; 2407 #if 0 2408 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2409 clone->notify_status = APM_EV_NONE; 2410 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2411 KNOTE(&clone->sel_read.si_note, 0); 2412 } 2413 } 2414 #endif 2415 2416 /* If devd(8) is not running, immediately enter the sleep state. */ 2417 if (devctl_process_running() == FALSE) { 2418 ACPI_UNLOCK(acpi); 2419 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2420 return (0); 2421 } else { 2422 return (ENXIO); 2423 } 2424 } 2425 2426 /* Now notify devd(8) also. */ 2427 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2428 2429 /* 2430 * Set a timeout to fire if userland doesn't ack the suspend request 2431 * in time. This way we still eventually go to sleep if we were 2432 * overheating or running low on battery, even if userland is hung. 2433 * We cancel this timeout once all userland acks are in or the 2434 * suspend request is aborted. 2435 */ 2436 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2437 ACPI_UNLOCK(acpi); 2438 2439 return (0); 2440 } 2441 2442 /* 2443 * Acknowledge (or reject) a pending sleep state. The caller has 2444 * prepared for suspend and is now ready for it to proceed. If the 2445 * error argument is non-zero, it indicates suspend should be cancelled 2446 * and gives an errno value describing why. Once all votes are in, 2447 * we suspend the system. 2448 */ 2449 int 2450 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2451 { 2452 struct acpi_softc *sc; 2453 int ret, sleeping; 2454 2455 /* This platform does not support acpi suspend/resume. */ 2456 return (EOPNOTSUPP); 2457 2458 /* If no pending sleep state, return an error. */ 2459 ACPI_LOCK(acpi); 2460 sc = clone->acpi_sc; 2461 if (sc->acpi_next_sstate == 0) { 2462 ACPI_UNLOCK(acpi); 2463 return (ENXIO); 2464 } 2465 2466 /* Caller wants to abort suspend process. */ 2467 if (error) { 2468 sc->acpi_next_sstate = 0; 2469 callout_stop(&sc->susp_force_to); 2470 device_printf(sc->acpi_dev, 2471 "listener on %s cancelled the pending suspend\n", 2472 devtoname(clone->cdev)); 2473 ACPI_UNLOCK(acpi); 2474 return (0); 2475 } 2476 2477 /* 2478 * Mark this device as acking the suspend request. Then, walk through 2479 * all devices, seeing if they agree yet. We only count devices that 2480 * are writable since read-only devices couldn't ack the request. 2481 */ 2482 clone->notify_status = APM_EV_ACKED; 2483 sleeping = TRUE; 2484 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2485 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2486 clone->notify_status != APM_EV_ACKED) { 2487 sleeping = FALSE; 2488 break; 2489 } 2490 } 2491 2492 /* If all devices have voted "yes", we will suspend now. */ 2493 if (sleeping) 2494 callout_stop(&sc->susp_force_to); 2495 ACPI_UNLOCK(acpi); 2496 ret = 0; 2497 if (sleeping) { 2498 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2499 ret = ENODEV; 2500 } 2501 2502 return (ret); 2503 } 2504 2505 static void 2506 acpi_sleep_enable(void *arg) 2507 { 2508 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2509 } 2510 2511 enum acpi_sleep_state { 2512 ACPI_SS_NONE, 2513 ACPI_SS_GPE_SET, 2514 ACPI_SS_DEV_SUSPEND, 2515 ACPI_SS_SLP_PREP, 2516 ACPI_SS_SLEPT, 2517 }; 2518 2519 /* 2520 * Enter the desired system sleep state. 2521 * 2522 * Currently we support S1-S5 but S4 is only S4BIOS 2523 */ 2524 static ACPI_STATUS 2525 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2526 { 2527 ACPI_STATUS status; 2528 UINT8 TypeA; 2529 UINT8 TypeB; 2530 enum acpi_sleep_state slp_state; 2531 2532 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2533 2534 /* Re-entry once we're suspending is not allowed. */ 2535 status = AE_OK; 2536 ACPI_LOCK(acpi); 2537 if (sc->acpi_sleep_disabled) { 2538 ACPI_UNLOCK(acpi); 2539 device_printf(sc->acpi_dev, 2540 "suspend request ignored (not ready yet)\n"); 2541 return (AE_ERROR); 2542 } 2543 sc->acpi_sleep_disabled = 1; 2544 ACPI_UNLOCK(acpi); 2545 2546 /* 2547 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2548 * drivers need this. 2549 */ 2550 //get_mplock(); 2551 2552 slp_state = ACPI_SS_NONE; 2553 switch (state) { 2554 case ACPI_STATE_S1: 2555 case ACPI_STATE_S2: 2556 case ACPI_STATE_S3: 2557 case ACPI_STATE_S4: 2558 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2559 if (status == AE_NOT_FOUND) { 2560 device_printf(sc->acpi_dev, 2561 "Sleep state S%d not supported by BIOS\n", state); 2562 break; 2563 } else if (ACPI_FAILURE(status)) { 2564 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2565 AcpiFormatException(status)); 2566 break; 2567 } 2568 2569 sc->acpi_sstate = state; 2570 2571 /* Enable any GPEs as appropriate and requested by the user. */ 2572 acpi_wake_prep_walk(state); 2573 slp_state = ACPI_SS_GPE_SET; 2574 2575 /* 2576 * Inform all devices that we are going to sleep. If at least one 2577 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2578 * 2579 * XXX Note that a better two-pass approach with a 'veto' pass 2580 * followed by a "real thing" pass would be better, but the current 2581 * bus interface does not provide for this. 2582 */ 2583 if (DEVICE_SUSPEND(root_bus) != 0) { 2584 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2585 break; 2586 } 2587 slp_state = ACPI_SS_DEV_SUSPEND; 2588 2589 /* If testing device suspend only, back out of everything here. */ 2590 if (acpi_susp_bounce) 2591 break; 2592 2593 status = AcpiEnterSleepStatePrep(state); 2594 if (ACPI_FAILURE(status)) { 2595 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2596 AcpiFormatException(status)); 2597 break; 2598 } 2599 slp_state = ACPI_SS_SLP_PREP; 2600 2601 if (sc->acpi_sleep_delay > 0) 2602 DELAY(sc->acpi_sleep_delay * 1000000); 2603 2604 if (state != ACPI_STATE_S1) { 2605 acpi_sleep_machdep(sc, state); 2606 2607 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2608 if (state == ACPI_STATE_S4) 2609 AcpiEnable(); 2610 } else { 2611 ACPI_DISABLE_IRQS(); 2612 status = AcpiEnterSleepState(state); 2613 if (ACPI_FAILURE(status)) { 2614 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2615 AcpiFormatException(status)); 2616 break; 2617 } 2618 } 2619 slp_state = ACPI_SS_SLEPT; 2620 break; 2621 case ACPI_STATE_S5: 2622 /* 2623 * Shut down cleanly and power off. This will call us back through the 2624 * shutdown handlers. 2625 */ 2626 shutdown_nice(RB_POWEROFF); 2627 break; 2628 case ACPI_STATE_S0: 2629 default: 2630 status = AE_BAD_PARAMETER; 2631 break; 2632 } 2633 2634 /* 2635 * Back out state according to how far along we got in the suspend 2636 * process. This handles both the error and success cases. 2637 */ 2638 sc->acpi_next_sstate = 0; 2639 if (slp_state >= ACPI_SS_GPE_SET) { 2640 acpi_wake_prep_walk(state); 2641 sc->acpi_sstate = ACPI_STATE_S0; 2642 } 2643 if (slp_state >= ACPI_SS_SLP_PREP) 2644 AcpiLeaveSleepState(state); 2645 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2646 DEVICE_RESUME(root_bus); 2647 if (slp_state >= ACPI_SS_SLEPT) 2648 acpi_enable_fixed_events(sc); 2649 2650 /* Allow another sleep request after a while. */ 2651 /* XXX: needs timeout */ 2652 if (state != ACPI_STATE_S5) 2653 acpi_sleep_enable(sc); 2654 2655 /* Run /etc/rc.resume after we are back. */ 2656 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2657 2658 //rel_mplock(); 2659 2660 return_ACPI_STATUS (status); 2661 } 2662 2663 /* Enable or disable the device's GPE. */ 2664 int 2665 acpi_wake_set_enable(device_t dev, int enable) 2666 { 2667 struct acpi_prw_data prw; 2668 ACPI_STATUS status; 2669 int flags; 2670 2671 /* Make sure the device supports waking the system and get the GPE. */ 2672 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2673 return (ENXIO); 2674 2675 flags = acpi_get_flags(dev); 2676 if (enable) { 2677 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2678 ACPI_GPE_ENABLE); 2679 if (ACPI_FAILURE(status)) { 2680 device_printf(dev, "enable wake failed\n"); 2681 return (ENXIO); 2682 } 2683 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2684 } else { 2685 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2686 ACPI_GPE_DISABLE); 2687 if (ACPI_FAILURE(status)) { 2688 device_printf(dev, "disable wake failed\n"); 2689 return (ENXIO); 2690 } 2691 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2692 } 2693 2694 return (0); 2695 } 2696 2697 static int 2698 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2699 { 2700 struct acpi_prw_data prw; 2701 device_t dev; 2702 2703 /* Check that this is a wake-capable device and get its GPE. */ 2704 if (acpi_parse_prw(handle, &prw) != 0) 2705 return (ENXIO); 2706 dev = acpi_get_device(handle); 2707 2708 /* 2709 * The destination sleep state must be less than (i.e., higher power) 2710 * or equal to the value specified by _PRW. If this GPE cannot be 2711 * enabled for the next sleep state, then disable it. If it can and 2712 * the user requested it be enabled, turn on any required power resources 2713 * and set _PSW. 2714 */ 2715 if (sstate > prw.lowest_wake) { 2716 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2717 if (bootverbose) 2718 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2719 acpi_name(handle), sstate); 2720 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2721 acpi_pwr_wake_enable(handle, 1); 2722 acpi_SetInteger(handle, "_PSW", 1); 2723 if (bootverbose) 2724 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2725 acpi_name(handle), sstate); 2726 } 2727 2728 return (0); 2729 } 2730 2731 static int 2732 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2733 { 2734 struct acpi_prw_data prw; 2735 device_t dev; 2736 2737 /* 2738 * Check that this is a wake-capable device and get its GPE. Return 2739 * now if the user didn't enable this device for wake. 2740 */ 2741 if (acpi_parse_prw(handle, &prw) != 0) 2742 return (ENXIO); 2743 dev = acpi_get_device(handle); 2744 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2745 return (0); 2746 2747 /* 2748 * If this GPE couldn't be enabled for the previous sleep state, it was 2749 * disabled before going to sleep so re-enable it. If it was enabled, 2750 * clear _PSW and turn off any power resources it used. 2751 */ 2752 if (sstate > prw.lowest_wake) { 2753 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2754 if (bootverbose) 2755 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2756 } else { 2757 acpi_SetInteger(handle, "_PSW", 0); 2758 acpi_pwr_wake_enable(handle, 0); 2759 if (bootverbose) 2760 device_printf(dev, "run_prep cleaned up for %s\n", 2761 acpi_name(handle)); 2762 } 2763 2764 return (0); 2765 } 2766 2767 static ACPI_STATUS 2768 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2769 { 2770 int sstate; 2771 2772 /* If suspending, run the sleep prep function, otherwise wake. */ 2773 sstate = *(int *)context; 2774 if (AcpiGbl_SystemAwakeAndRunning) 2775 acpi_wake_sleep_prep(handle, sstate); 2776 else 2777 acpi_wake_run_prep(handle, sstate); 2778 return (AE_OK); 2779 } 2780 2781 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2782 static int 2783 acpi_wake_prep_walk(int sstate) 2784 { 2785 ACPI_HANDLE sb_handle; 2786 2787 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2788 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2789 acpi_wake_prep, NULL, &sstate, NULL); 2790 } 2791 return (0); 2792 } 2793 2794 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2795 static int 2796 acpi_wake_sysctl_walk(device_t dev) 2797 { 2798 #ifdef notyet 2799 int error, i, numdevs; 2800 device_t *devlist; 2801 device_t child; 2802 ACPI_STATUS status; 2803 2804 error = device_get_children(dev, &devlist, &numdevs); 2805 if (error != 0 || numdevs == 0) { 2806 if (numdevs == 0) 2807 kfree(devlist, M_TEMP); 2808 return (error); 2809 } 2810 for (i = 0; i < numdevs; i++) { 2811 child = devlist[i]; 2812 acpi_wake_sysctl_walk(child); 2813 if (!device_is_attached(child)) 2814 continue; 2815 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2816 if (ACPI_SUCCESS(status)) { 2817 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2818 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2819 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2820 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2821 } 2822 } 2823 kfree(devlist, M_TEMP); 2824 #endif 2825 2826 return (0); 2827 } 2828 2829 #ifdef notyet 2830 /* Enable or disable wake from userland. */ 2831 static int 2832 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2833 { 2834 int enable, error; 2835 device_t dev; 2836 2837 dev = (device_t)arg1; 2838 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2839 2840 error = sysctl_handle_int(oidp, &enable, 0, req); 2841 if (error != 0 || req->newptr == NULL) 2842 return (error); 2843 if (enable != 0 && enable != 1) 2844 return (EINVAL); 2845 2846 return (acpi_wake_set_enable(dev, enable)); 2847 } 2848 #endif 2849 2850 /* Parse a device's _PRW into a structure. */ 2851 int 2852 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2853 { 2854 ACPI_STATUS status; 2855 ACPI_BUFFER prw_buffer; 2856 ACPI_OBJECT *res, *res2; 2857 int error, i, power_count; 2858 2859 if (h == NULL || prw == NULL) 2860 return (EINVAL); 2861 2862 /* 2863 * The _PRW object (7.2.9) is only required for devices that have the 2864 * ability to wake the system from a sleeping state. 2865 */ 2866 error = EINVAL; 2867 prw_buffer.Pointer = NULL; 2868 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2869 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2870 if (ACPI_FAILURE(status)) 2871 return (ENOENT); 2872 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2873 if (res == NULL) 2874 return (ENOENT); 2875 if (!ACPI_PKG_VALID(res, 2)) 2876 goto out; 2877 2878 /* 2879 * Element 1 of the _PRW object: 2880 * The lowest power system sleeping state that can be entered while still 2881 * providing wake functionality. The sleeping state being entered must 2882 * be less than (i.e., higher power) or equal to this value. 2883 */ 2884 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2885 goto out; 2886 2887 /* 2888 * Element 0 of the _PRW object: 2889 */ 2890 switch (res->Package.Elements[0].Type) { 2891 case ACPI_TYPE_INTEGER: 2892 /* 2893 * If the data type of this package element is numeric, then this 2894 * _PRW package element is the bit index in the GPEx_EN, in the 2895 * GPE blocks described in the FADT, of the enable bit that is 2896 * enabled for the wake event. 2897 */ 2898 prw->gpe_handle = NULL; 2899 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2900 error = 0; 2901 break; 2902 case ACPI_TYPE_PACKAGE: 2903 /* 2904 * If the data type of this package element is a package, then this 2905 * _PRW package element is itself a package containing two 2906 * elements. The first is an object reference to the GPE Block 2907 * device that contains the GPE that will be triggered by the wake 2908 * event. The second element is numeric and it contains the bit 2909 * index in the GPEx_EN, in the GPE Block referenced by the 2910 * first element in the package, of the enable bit that is enabled for 2911 * the wake event. 2912 * 2913 * For example, if this field is a package then it is of the form: 2914 * Package() {\_SB.PCI0.ISA.GPE, 2} 2915 */ 2916 res2 = &res->Package.Elements[0]; 2917 if (!ACPI_PKG_VALID(res2, 2)) 2918 goto out; 2919 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2920 if (prw->gpe_handle == NULL) 2921 goto out; 2922 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2923 goto out; 2924 error = 0; 2925 break; 2926 default: 2927 goto out; 2928 } 2929 2930 /* Elements 2 to N of the _PRW object are power resources. */ 2931 power_count = res->Package.Count - 2; 2932 if (power_count > ACPI_PRW_MAX_POWERRES) { 2933 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2934 power_count = 0; 2935 } 2936 prw->power_res_count = power_count; 2937 for (i = 0; i < power_count; i++) 2938 prw->power_res[i] = res->Package.Elements[i]; 2939 2940 out: 2941 if (prw_buffer.Pointer != NULL) 2942 AcpiOsFree(prw_buffer.Pointer); 2943 return (error); 2944 } 2945 2946 /* 2947 * ACPI Event Handlers 2948 */ 2949 2950 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2951 2952 static void 2953 acpi_system_eventhandler_sleep(void *arg, int state) 2954 { 2955 struct acpi_softc *sc; 2956 int ret; 2957 2958 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2959 2960 sc = arg; 2961 2962 /* Check if button action is disabled. */ 2963 if (state == ACPI_S_STATES_MAX + 1) 2964 return; 2965 2966 /* Request that the system prepare to enter the given suspend state. */ 2967 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2968 if (ret != 0) 2969 device_printf(sc->acpi_dev, 2970 "request to enter state S%d failed (err %d)\n", state, ret); 2971 2972 return_VOID; 2973 } 2974 2975 static void 2976 acpi_system_eventhandler_wakeup(void *arg, int state) 2977 { 2978 2979 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2980 2981 /* Currently, nothing to do for wakeup. */ 2982 2983 return_VOID; 2984 } 2985 2986 /* 2987 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2988 */ 2989 UINT32 2990 acpi_event_power_button_sleep(void *context) 2991 { 2992 struct acpi_softc *sc = (struct acpi_softc *)context; 2993 2994 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2995 2996 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2997 2998 return_VALUE (ACPI_INTERRUPT_HANDLED); 2999 } 3000 3001 UINT32 3002 acpi_event_power_button_wake(void *context) 3003 { 3004 struct acpi_softc *sc = (struct acpi_softc *)context; 3005 3006 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3007 3008 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 3009 3010 return_VALUE (ACPI_INTERRUPT_HANDLED); 3011 } 3012 3013 UINT32 3014 acpi_event_sleep_button_sleep(void *context) 3015 { 3016 struct acpi_softc *sc = (struct acpi_softc *)context; 3017 3018 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3019 3020 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 3021 3022 return_VALUE (ACPI_INTERRUPT_HANDLED); 3023 } 3024 3025 UINT32 3026 acpi_event_sleep_button_wake(void *context) 3027 { 3028 struct acpi_softc *sc = (struct acpi_softc *)context; 3029 3030 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 3031 3032 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 3033 3034 return_VALUE (ACPI_INTERRUPT_HANDLED); 3035 } 3036 3037 /* 3038 * XXX This static buffer is suboptimal. There is no locking so only 3039 * use this for single-threaded callers. 3040 */ 3041 char * 3042 acpi_name(ACPI_HANDLE handle) 3043 { 3044 ACPI_BUFFER buf; 3045 static char data[256]; 3046 3047 buf.Length = sizeof(data); 3048 buf.Pointer = data; 3049 3050 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 3051 return (data); 3052 return ("(unknown)"); 3053 } 3054 3055 /* 3056 * Debugging/bug-avoidance. Avoid trying to fetch info on various 3057 * parts of the namespace. 3058 */ 3059 int 3060 acpi_avoid(ACPI_HANDLE handle) 3061 { 3062 char *cp, *env, *np; 3063 int len; 3064 3065 np = acpi_name(handle); 3066 if (*np == '\\') 3067 np++; 3068 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 3069 return (0); 3070 3071 /* Scan the avoid list checking for a match */ 3072 cp = env; 3073 for (;;) { 3074 while (*cp != 0 && isspace(*cp)) 3075 cp++; 3076 if (*cp == 0) 3077 break; 3078 len = 0; 3079 while (cp[len] != 0 && !isspace(cp[len])) 3080 len++; 3081 if (!strncmp(cp, np, len)) { 3082 kfreeenv(env); 3083 return(1); 3084 } 3085 cp += len; 3086 } 3087 kfreeenv(env); 3088 3089 return (0); 3090 } 3091 3092 /* 3093 * Debugging/bug-avoidance. Disable ACPI subsystem components. 3094 */ 3095 int 3096 acpi_disabled(char *subsys) 3097 { 3098 char *cp, *env; 3099 int len; 3100 3101 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 3102 return (0); 3103 if (strcmp(env, "all") == 0) { 3104 kfreeenv(env); 3105 return (1); 3106 } 3107 3108 /* Scan the disable list, checking for a match. */ 3109 cp = env; 3110 for (;;) { 3111 while (*cp != '\0' && isspace(*cp)) 3112 cp++; 3113 if (*cp == '\0') 3114 break; 3115 len = 0; 3116 while (cp[len] != '\0' && !isspace(cp[len])) 3117 len++; 3118 if (strncmp(cp, subsys, len) == 0) { 3119 kfreeenv(env); 3120 return (1); 3121 } 3122 cp += len; 3123 } 3124 kfreeenv(env); 3125 3126 return (0); 3127 } 3128 3129 /* 3130 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 3131 * components are enabled by default. The ones that are not have to be 3132 * enabled via debug.acpi.enabled. 3133 */ 3134 int 3135 acpi_enabled(char *subsys) 3136 { 3137 char *cp, *env; 3138 int len; 3139 3140 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 3141 return (0); 3142 if (strcmp(env, "all") == 0) { 3143 kfreeenv(env); 3144 return (1); 3145 } 3146 3147 /* Scan the enable list, checking for a match. */ 3148 cp = env; 3149 for (;;) { 3150 while (*cp != '\0' && isspace(*cp)) 3151 cp++; 3152 if (*cp == '\0') 3153 break; 3154 len = 0; 3155 while (cp[len] != '\0' && !isspace(cp[len])) 3156 len++; 3157 if (strncmp(cp, subsys, len) == 0) { 3158 kfreeenv(env); 3159 return (1); 3160 } 3161 cp += len; 3162 } 3163 kfreeenv(env); 3164 3165 return (0); 3166 } 3167 3168 /* 3169 * Control interface. 3170 * 3171 * We multiplex ioctls for all participating ACPI devices here. Individual 3172 * drivers wanting to be accessible via /dev/acpi should use the 3173 * register/deregister interface to make their handlers visible. 3174 */ 3175 struct acpi_ioctl_hook 3176 { 3177 TAILQ_ENTRY(acpi_ioctl_hook) link; 3178 u_long cmd; 3179 acpi_ioctl_fn fn; 3180 void *arg; 3181 }; 3182 3183 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 3184 static int acpi_ioctl_hooks_initted; 3185 3186 int 3187 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 3188 { 3189 struct acpi_ioctl_hook *hp; 3190 3191 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 3192 return (ENOMEM); 3193 hp->cmd = cmd; 3194 hp->fn = fn; 3195 hp->arg = arg; 3196 3197 ACPI_LOCK(acpi); 3198 if (acpi_ioctl_hooks_initted == 0) { 3199 TAILQ_INIT(&acpi_ioctl_hooks); 3200 acpi_ioctl_hooks_initted = 1; 3201 } 3202 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3203 ACPI_UNLOCK(acpi); 3204 3205 return (0); 3206 } 3207 3208 void 3209 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3210 { 3211 struct acpi_ioctl_hook *hp; 3212 3213 ACPI_LOCK(acpi); 3214 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3215 if (hp->cmd == cmd && hp->fn == fn) 3216 break; 3217 3218 if (hp != NULL) { 3219 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3220 kfree(hp, M_ACPIDEV); 3221 } 3222 ACPI_UNLOCK(acpi); 3223 } 3224 3225 static int 3226 acpiopen(struct dev_open_args *ap) 3227 { 3228 return (0); 3229 } 3230 3231 static int 3232 acpiclose(struct dev_close_args *ap) 3233 { 3234 return (0); 3235 } 3236 3237 static void 3238 acpi_free_object_list(ACPI_OBJECT_LIST *list) 3239 { 3240 for (int i = 0; i < list->Count; i++) { 3241 switch (list->Pointer[i].Type) { 3242 case ACPI_TYPE_STRING: 3243 AcpiOsFree(list->Pointer[i].String.Pointer); 3244 break; 3245 case ACPI_TYPE_BUFFER: 3246 AcpiOsFree(list->Pointer[i].Buffer.Pointer); 3247 break; 3248 default: 3249 break; 3250 } 3251 } 3252 AcpiOsFree(list); 3253 } 3254 3255 static ACPI_OBJECT_LIST * 3256 acpi_copyin_object_list(ACPI_OBJECT_LIST *src) 3257 { 3258 ACPI_OBJECT_LIST *dest; 3259 BOOLEAN failed; 3260 3261 if (src->Count > 7) 3262 return NULL; 3263 3264 dest = AcpiOsAllocate(sizeof(ACPI_OBJECT_LIST) + sizeof(ACPI_OBJECT) * src->Count); 3265 if (!dest) 3266 return NULL; 3267 3268 dest->Count = src->Count; 3269 dest->Pointer = (ACPI_OBJECT *)(dest + 1); 3270 if (copyin(src->Pointer, dest->Pointer, sizeof(ACPI_OBJECT) * dest->Count)) { 3271 AcpiOsFree(dest); 3272 return NULL; 3273 } 3274 3275 failed = FALSE; 3276 3277 for (int i = 0; i < dest->Count; i++) { 3278 switch (dest->Pointer[i].Type) { 3279 case ACPI_TYPE_INTEGER: 3280 break; 3281 case ACPI_TYPE_STRING: { 3282 void *v = AcpiOsAllocate(dest->Pointer[i].String.Length); 3283 if (!v || copyin(dest->Pointer[i].String.Pointer, v, dest->Pointer[i].String.Length)) 3284 failed = TRUE; 3285 dest->Pointer[i].String.Pointer = v; 3286 break; 3287 } 3288 case ACPI_TYPE_BUFFER: { 3289 void *v = AcpiOsAllocate(dest->Pointer[i].Buffer.Length); 3290 if (!v || copyin(dest->Pointer[i].Buffer.Pointer, v, dest->Pointer[i].Buffer.Length)) 3291 failed = TRUE; 3292 dest->Pointer[i].String.Pointer = v; 3293 break; 3294 } 3295 default: 3296 failed = TRUE; 3297 break; 3298 } 3299 } 3300 3301 if (failed) { 3302 acpi_free_object_list(dest); 3303 dest = NULL; 3304 } 3305 3306 return dest; 3307 } 3308 3309 static int 3310 acpi_call_ioctl(caddr_t addr) 3311 { 3312 struct acpi_mcall_ioctl_arg *params; 3313 ACPI_OBJECT_LIST *args; 3314 ACPI_BUFFER result; 3315 char path[256]; 3316 3317 result.Length = ACPI_ALLOCATE_BUFFER; 3318 result.Pointer = NULL; 3319 3320 params = (struct acpi_mcall_ioctl_arg *)addr; 3321 args = acpi_copyin_object_list(¶ms->args); 3322 if (!args) 3323 return EINVAL; 3324 if (copyinstr(params->path, path, sizeof(path), NULL)) 3325 return EINVAL; 3326 params->retval = AcpiEvaluateObject(NULL, path, args, &result); 3327 if (ACPI_SUCCESS(params->retval)) { 3328 if (result.Pointer != NULL) { 3329 if (params->result.Pointer != NULL) { 3330 params->result.Length = min(params->result.Length, 3331 result.Length); 3332 if (result.Length >= sizeof(ACPI_OBJECT)) { 3333 acpi_call_fixup_pointers((ACPI_OBJECT *)result.Pointer, 3334 params->result.Pointer); 3335 } 3336 copyout(result.Pointer, params->result.Pointer, 3337 params->result.Length); 3338 params->reslen = result.Length; 3339 } 3340 AcpiOsFree(result.Pointer); 3341 } 3342 } 3343 acpi_free_object_list(args); 3344 3345 return (0); 3346 } 3347 3348 void 3349 acpi_call_fixup_pointers(ACPI_OBJECT *p, UINT8 *dest) 3350 { 3351 switch (p->Type) { 3352 case ACPI_TYPE_STRING: 3353 p->String.Pointer += dest - (UINT8 *)p; 3354 break; 3355 case ACPI_TYPE_BUFFER: 3356 p->Buffer.Pointer += dest - (UINT8 *)p; 3357 break; 3358 } 3359 } 3360 3361 static int 3362 acpiioctl(struct dev_ioctl_args *ap) 3363 { 3364 struct acpi_softc *sc; 3365 struct acpi_ioctl_hook *hp; 3366 int error, state; 3367 3368 error = 0; 3369 hp = NULL; 3370 sc = ap->a_head.a_dev->si_drv1; 3371 3372 /* 3373 * Scan the list of registered ioctls, looking for handlers. 3374 */ 3375 lwkt_gettoken(&acpi_token); 3376 ACPI_LOCK(acpi); 3377 if (acpi_ioctl_hooks_initted) { 3378 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3379 if (hp->cmd == ap->a_cmd) 3380 break; 3381 } 3382 } 3383 ACPI_UNLOCK(acpi); 3384 if (hp) { 3385 error = hp->fn(ap->a_cmd, ap->a_data, hp->arg); 3386 lwkt_reltoken(&acpi_token); 3387 return error; 3388 } 3389 3390 /* 3391 * Core ioctls are not permitted for non-writable user. 3392 * Currently, other ioctls just fetch information. 3393 * Not changing system behavior. 3394 */ 3395 if ((ap->a_fflag & FWRITE) == 0) { 3396 lwkt_reltoken(&acpi_token); 3397 return (EPERM); 3398 } 3399 3400 /* Core system ioctls. */ 3401 switch (ap->a_cmd) { 3402 case ACPIIO_REQSLPSTATE: 3403 state = *(int *)ap->a_data; 3404 if (state != ACPI_STATE_S5) 3405 error = acpi_ReqSleepState(sc, state); 3406 else { 3407 device_printf(sc->acpi_dev, 3408 "power off via acpi ioctl not supported\n"); 3409 error = ENXIO; 3410 } 3411 break; 3412 case ACPIIO_ACKSLPSTATE: 3413 error = EOPNOTSUPP; 3414 #if 0 /* notyet */ 3415 error = *(int *)ap->a_data; 3416 error = acpi_AckSleepState(sc->acpi_clone, error); 3417 #endif 3418 break; 3419 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3420 error = EINVAL; 3421 state = *(int *)ap->a_data; 3422 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3423 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3424 error = 0; 3425 break; 3426 case ACPIIO_DO_MCALL: 3427 if (acpi_allow_mcall == 1) { 3428 error = acpi_call_ioctl(ap->a_data); 3429 } else { 3430 device_printf(sc->acpi_dev, 3431 "debug.acpi.allow_method_calls must be set\n"); 3432 error = ENXIO; 3433 } 3434 break; 3435 default: 3436 error = ENXIO; 3437 break; 3438 } 3439 lwkt_reltoken(&acpi_token); 3440 3441 return (error); 3442 } 3443 3444 static int 3445 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3446 { 3447 int error; 3448 struct sbuf sb; 3449 UINT8 state, TypeA, TypeB; 3450 3451 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3452 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3453 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3454 sbuf_printf(&sb, "S%d ", state); 3455 sbuf_trim(&sb); 3456 sbuf_finish(&sb); 3457 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3458 sbuf_delete(&sb); 3459 return (error); 3460 } 3461 3462 static int 3463 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3464 { 3465 char sleep_state[10]; 3466 int error; 3467 u_int new_state, old_state; 3468 3469 old_state = *(u_int *)oidp->oid_arg1; 3470 if (old_state > ACPI_S_STATES_MAX + 1) 3471 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3472 else 3473 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3474 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3475 if (error == 0 && req->newptr != NULL) { 3476 new_state = ACPI_STATE_S0; 3477 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3478 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3479 break; 3480 if (new_state <= ACPI_S_STATES_MAX + 1) { 3481 if (new_state != old_state) 3482 *(u_int *)oidp->oid_arg1 = new_state; 3483 } else 3484 error = EINVAL; 3485 } 3486 3487 return (error); 3488 } 3489 3490 /* Inform devctl(4) when we receive a Notify. */ 3491 void 3492 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3493 { 3494 char notify_buf[16]; 3495 ACPI_BUFFER handle_buf; 3496 ACPI_STATUS status; 3497 3498 if (subsystem == NULL) 3499 return; 3500 3501 handle_buf.Pointer = NULL; 3502 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3503 status = AcpiNsHandleToPathname(h, &handle_buf, FALSE); 3504 if (ACPI_FAILURE(status)) 3505 return; 3506 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3507 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3508 AcpiOsFree(handle_buf.Pointer); 3509 } 3510 3511 #ifdef ACPI_DEBUG 3512 /* 3513 * Support for parsing debug options from the kernel environment. 3514 * 3515 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3516 * by specifying the names of the bits in the debug.acpi.layer and 3517 * debug.acpi.level environment variables. Bits may be unset by 3518 * prefixing the bit name with !. 3519 */ 3520 struct debugtag 3521 { 3522 char *name; 3523 UINT32 value; 3524 }; 3525 3526 static struct debugtag dbg_layer[] = { 3527 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3528 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3529 {"ACPI_EVENTS", ACPI_EVENTS}, 3530 {"ACPI_TABLES", ACPI_TABLES}, 3531 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3532 {"ACPI_PARSER", ACPI_PARSER}, 3533 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3534 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3535 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3536 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3537 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3538 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3539 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3540 3541 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3542 {"ACPI_BATTERY", ACPI_BATTERY}, 3543 {"ACPI_BUS", ACPI_BUS}, 3544 {"ACPI_BUTTON", ACPI_BUTTON}, 3545 {"ACPI_EC", ACPI_EC}, 3546 {"ACPI_FAN", ACPI_FAN}, 3547 {"ACPI_POWERRES", ACPI_POWERRES}, 3548 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3549 {"ACPI_THERMAL", ACPI_THERMAL}, 3550 {"ACPI_TIMER", ACPI_TIMER}, 3551 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3552 {NULL, 0} 3553 }; 3554 3555 static struct debugtag dbg_level[] = { 3556 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3557 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3558 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3559 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3560 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3561 3562 /* Trace verbosity level 1 [Standard Trace Level] */ 3563 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3564 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3565 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3566 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3567 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3568 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3569 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3570 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3571 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3572 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3573 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3574 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3575 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3576 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3577 {"ACPI_LV_EVALUATION", ACPI_LV_EVALUATION}, 3578 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3579 3580 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3581 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3582 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3583 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3584 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3585 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3586 3587 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3588 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3589 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3590 {"ACPI_LV_IO", ACPI_LV_IO}, 3591 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3592 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3593 3594 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3595 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3596 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3597 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3598 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3599 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3600 {NULL, 0} 3601 }; 3602 3603 static void 3604 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3605 { 3606 char *ep; 3607 int i, l; 3608 int set; 3609 3610 while (*cp) { 3611 if (isspace(*cp)) { 3612 cp++; 3613 continue; 3614 } 3615 ep = cp; 3616 while (*ep && !isspace(*ep)) 3617 ep++; 3618 if (*cp == '!') { 3619 set = 0; 3620 cp++; 3621 if (cp == ep) 3622 continue; 3623 } else { 3624 set = 1; 3625 } 3626 l = ep - cp; 3627 for (i = 0; tag[i].name != NULL; i++) { 3628 if (!strncmp(cp, tag[i].name, l)) { 3629 if (set) 3630 *flag |= tag[i].value; 3631 else 3632 *flag &= ~tag[i].value; 3633 } 3634 } 3635 cp = ep; 3636 } 3637 } 3638 3639 static void 3640 acpi_set_debugging(void *junk) 3641 { 3642 char *layer, *level; 3643 3644 if (cold) { 3645 AcpiDbgLayer = 0; 3646 AcpiDbgLevel = 0; 3647 } 3648 3649 layer = kgetenv("debug.acpi.layer"); 3650 level = kgetenv("debug.acpi.level"); 3651 if (layer == NULL && level == NULL) 3652 return; 3653 3654 kprintf("ACPI set debug"); 3655 if (layer != NULL) { 3656 if (strcmp("NONE", layer) != 0) 3657 kprintf(" layer '%s'", layer); 3658 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3659 kfreeenv(layer); 3660 } 3661 if (level != NULL) { 3662 if (strcmp("NONE", level) != 0) 3663 kprintf(" level '%s'", level); 3664 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3665 kfreeenv(level); 3666 } 3667 kprintf("\n"); 3668 } 3669 3670 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3671 NULL); 3672 3673 static int 3674 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3675 { 3676 int error, *dbg; 3677 struct debugtag *tag; 3678 struct sbuf sb; 3679 3680 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3681 return (ENOMEM); 3682 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3683 tag = &dbg_layer[0]; 3684 dbg = &AcpiDbgLayer; 3685 } else { 3686 tag = &dbg_level[0]; 3687 dbg = &AcpiDbgLevel; 3688 } 3689 3690 /* Get old values if this is a get request. */ 3691 ACPI_SERIAL_BEGIN(acpi); 3692 if (*dbg == 0) { 3693 sbuf_cpy(&sb, "NONE"); 3694 } else if (req->newptr == NULL) { 3695 for (; tag->name != NULL; tag++) { 3696 if ((*dbg & tag->value) == tag->value) 3697 sbuf_printf(&sb, "%s ", tag->name); 3698 } 3699 } 3700 sbuf_trim(&sb); 3701 sbuf_finish(&sb); 3702 3703 /* Copy out the old values to the user. */ 3704 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3705 sbuf_delete(&sb); 3706 3707 /* If the user is setting a string, parse it. */ 3708 if (error == 0 && req->newptr != NULL) { 3709 *dbg = 0; 3710 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3711 acpi_set_debugging(NULL); 3712 } 3713 ACPI_SERIAL_END(acpi); 3714 3715 return (error); 3716 } 3717 3718 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3719 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3720 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3721 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3722 #endif /* ACPI_DEBUG */ 3723 3724 static int 3725 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS) 3726 { 3727 int error; 3728 int old; 3729 3730 old = acpi_debug_objects; 3731 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req); 3732 if (error != 0 || req->newptr == NULL) 3733 return (error); 3734 if (old == acpi_debug_objects || (old && acpi_debug_objects)) 3735 return (0); 3736 3737 ACPI_SERIAL_BEGIN(acpi); 3738 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE; 3739 ACPI_SERIAL_END(acpi); 3740 3741 return (0); 3742 } 3743 3744 3745 static int 3746 acpi_parse_interfaces(char *str, struct acpi_interface *iface) 3747 { 3748 char *p; 3749 size_t len; 3750 int i, j; 3751 3752 p = str; 3753 while (isspace(*p) || *p == ',') 3754 p++; 3755 len = strlen(p); 3756 if (len == 0) 3757 return (0); 3758 p = kstrdup(p, M_TEMP); 3759 for (i = 0; i < len; i++) 3760 if (p[i] == ',') 3761 p[i] = '\0'; 3762 i = j = 0; 3763 while (i < len) 3764 if (isspace(p[i]) || p[i] == '\0') 3765 i++; 3766 else { 3767 i += strlen(p + i) + 1; 3768 j++; 3769 } 3770 if (j == 0) { 3771 kfree(p, M_TEMP); 3772 return (0); 3773 } 3774 iface->data = kmalloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK); 3775 iface->num = j; 3776 i = j = 0; 3777 while (i < len) 3778 if (isspace(p[i]) || p[i] == '\0') 3779 i++; 3780 else { 3781 iface->data[j] = p + i; 3782 i += strlen(p + i) + 1; 3783 j++; 3784 } 3785 3786 return (j); 3787 } 3788 3789 static void 3790 acpi_free_interfaces(struct acpi_interface *iface) 3791 { 3792 kfree(iface->data[0], M_TEMP); 3793 kfree(iface->data, M_TEMP); 3794 } 3795 3796 static void 3797 acpi_reset_interfaces(device_t dev) 3798 { 3799 struct acpi_interface list; 3800 ACPI_STATUS status; 3801 int i; 3802 3803 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) { 3804 for (i = 0; i < list.num; i++) { 3805 status = AcpiInstallInterface(list.data[i]); 3806 if (ACPI_FAILURE(status)) 3807 device_printf(dev, 3808 "failed to install _OSI(\"%s\"): %s\n", 3809 list.data[i], AcpiFormatException(status)); 3810 else if (bootverbose) 3811 device_printf(dev, "installed _OSI(\"%s\")\n", 3812 list.data[i]); 3813 } 3814 acpi_free_interfaces(&list); 3815 } 3816 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) { 3817 for (i = 0; i < list.num; i++) { 3818 status = AcpiRemoveInterface(list.data[i]); 3819 if (ACPI_FAILURE(status)) 3820 device_printf(dev, 3821 "failed to remove _OSI(\"%s\"): %s\n", 3822 list.data[i], AcpiFormatException(status)); 3823 else if (bootverbose) 3824 device_printf(dev, "removed _OSI(\"%s\")\n", 3825 list.data[i]); 3826 } 3827 acpi_free_interfaces(&list); 3828 } 3829 } 3830 3831 static int 3832 acpi_pm_func(u_long cmd, void *arg, ...) 3833 { 3834 int state, acpi_state; 3835 int error; 3836 struct acpi_softc *sc; 3837 __va_list ap; 3838 3839 error = 0; 3840 switch (cmd) { 3841 case POWER_CMD_SUSPEND: 3842 sc = (struct acpi_softc *)arg; 3843 if (sc == NULL) { 3844 error = EINVAL; 3845 goto out; 3846 } 3847 3848 __va_start(ap, arg); 3849 state = __va_arg(ap, int); 3850 __va_end(ap); 3851 3852 switch (state) { 3853 case POWER_SLEEP_STATE_STANDBY: 3854 acpi_state = sc->acpi_standby_sx; 3855 break; 3856 case POWER_SLEEP_STATE_SUSPEND: 3857 acpi_state = sc->acpi_suspend_sx; 3858 break; 3859 case POWER_SLEEP_STATE_HIBERNATE: 3860 acpi_state = ACPI_STATE_S4; 3861 break; 3862 default: 3863 error = EINVAL; 3864 goto out; 3865 } 3866 3867 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3868 error = ENXIO; 3869 break; 3870 default: 3871 error = EINVAL; 3872 goto out; 3873 } 3874 3875 out: 3876 return (error); 3877 } 3878 3879 static void 3880 acpi_pm_register(void *arg) 3881 { 3882 if (!cold || resource_disabled("acpi", 0)) 3883 return; 3884 3885 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3886 } 3887 3888 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3889