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 51 #include <sys/rman.h> 52 #include <bus/isa/isavar.h> 53 #include <bus/isa/pnpvar.h> 54 55 #include "acpi.h" 56 #include <dev/acpica/acpivar.h> 57 #include <dev/acpica/acpiio.h> 58 #include "achware.h" 59 #include "acnamesp.h" 60 #include "acglobal.h" 61 62 #include "pci_if.h" 63 #include <bus/pci/pci_cfgreg.h> 64 #include <bus/pci/pcivar.h> 65 #include <bus/pci/pci_private.h> 66 67 #include <vm/vm_param.h> 68 69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71 #define GIANT_REQUIRED 72 #define mtx_lock(a) 73 #define mtx_unlock(a) 74 /* Hooks for the ACPI CA debugging infrastructure */ 75 #define _COMPONENT ACPI_BUS 76 ACPI_MODULE_NAME("ACPI") 77 78 static d_open_t acpiopen; 79 static d_close_t acpiclose; 80 static d_ioctl_t acpiioctl; 81 82 static struct dev_ops acpi_ops = { 83 { "acpi", 0, 0 }, 84 .d_open = acpiopen, 85 .d_close = acpiclose, 86 .d_ioctl = acpiioctl 87 }; 88 89 /* Global mutex for locking access to the ACPI subsystem. */ 90 struct lock acpi_lock; 91 /* Bitmap of device quirks. */ 92 int acpi_quirks; 93 94 static int acpi_modevent(struct module *mod, int event, void *junk); 95 static void acpi_identify(driver_t *driver, device_t parent); 96 static int acpi_probe(device_t dev); 97 static int acpi_attach(device_t dev); 98 static int acpi_suspend(device_t dev); 99 static int acpi_resume(device_t dev); 100 static int acpi_shutdown(device_t dev); 101 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 102 int unit); 103 static int acpi_print_child(device_t bus, device_t child); 104 static void acpi_probe_nomatch(device_t bus, device_t child); 105 static void acpi_driver_added(device_t dev, driver_t *driver); 106 static int acpi_read_ivar(device_t dev, device_t child, int index, 107 uintptr_t *result); 108 static int acpi_write_ivar(device_t dev, device_t child, int index, 109 uintptr_t value); 110 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 111 static int acpi_sysres_alloc(device_t dev); 112 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 113 int type, int *rid, u_long start, u_long end, 114 u_long count, u_int flags, int cpuid); 115 static int acpi_release_resource(device_t bus, device_t child, int type, 116 int rid, struct resource *r); 117 static void acpi_delete_resource(device_t bus, device_t child, int type, 118 int rid); 119 static uint32_t acpi_isa_get_logicalid(device_t dev); 120 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 121 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 122 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 123 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 124 ACPI_BUFFER *ret); 125 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 126 int *dstate); 127 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 128 void *context, void **retval); 129 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 130 int max_depth, acpi_scan_cb_t user_fn, void *arg); 131 static int acpi_set_powerstate_method(device_t bus, device_t child, 132 int state); 133 static int acpi_isa_pnp_probe(device_t bus, device_t child, 134 struct isa_pnp_id *ids); 135 static void acpi_probe_children(device_t bus); 136 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 137 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 138 void *context, void **status); 139 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 140 static void acpi_shutdown_final(void *arg, int howto); 141 static void acpi_enable_fixed_events(struct acpi_softc *sc); 142 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 144 static int acpi_wake_prep_walk(int sstate); 145 static int acpi_wake_sysctl_walk(device_t dev); 146 #ifdef notyet 147 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 148 #endif 149 static void acpi_system_eventhandler_sleep(void *arg, int state); 150 static void acpi_system_eventhandler_wakeup(void *arg, int state); 151 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 152 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 153 static int acpi_pm_func(u_long cmd, void *arg, ...); 154 static int acpi_child_location_str_method(device_t acdev, device_t child, 155 char *buf, size_t buflen); 156 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 157 char *buf, size_t buflen); 158 static void acpi_enable_pcie(void); 159 160 static device_method_t acpi_methods[] = { 161 /* Device interface */ 162 DEVMETHOD(device_identify, acpi_identify), 163 DEVMETHOD(device_probe, acpi_probe), 164 DEVMETHOD(device_attach, acpi_attach), 165 DEVMETHOD(device_shutdown, acpi_shutdown), 166 DEVMETHOD(device_detach, bus_generic_detach), 167 DEVMETHOD(device_suspend, acpi_suspend), 168 DEVMETHOD(device_resume, acpi_resume), 169 170 /* Bus interface */ 171 DEVMETHOD(bus_add_child, acpi_add_child), 172 DEVMETHOD(bus_print_child, acpi_print_child), 173 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 174 DEVMETHOD(bus_driver_added, acpi_driver_added), 175 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 176 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 177 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 178 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 179 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 180 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 181 DEVMETHOD(bus_release_resource, acpi_release_resource), 182 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 183 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 184 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 185 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 186 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 187 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 188 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 189 190 /* ACPI bus */ 191 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 192 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 193 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 194 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 195 196 /* PCI emulation */ 197 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 198 199 /* ISA emulation */ 200 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 201 202 DEVMETHOD_END 203 }; 204 205 static driver_t acpi_driver = { 206 "acpi", 207 acpi_methods, 208 sizeof(struct acpi_softc), 209 }; 210 211 static devclass_t acpi_devclass; 212 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 213 MODULE_VERSION(acpi, 1); 214 215 ACPI_SERIAL_DECL(acpi, "ACPI serializer") 216 217 /* Local pools for managing system resources for ACPI child devices. */ 218 static struct rman acpi_rman_io, acpi_rman_mem; 219 220 #define ACPI_MINIMUM_AWAKETIME 5 221 222 static const char* sleep_state_names[] = { 223 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 224 225 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 226 static char acpi_ca_version[12]; 227 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 228 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 229 230 /* 231 * Allow override of whether methods execute in parallel or not. 232 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 233 * errors for AML that really can't handle parallel method execution. 234 * It is off by default since this breaks recursive methods and 235 * some IBMs use such code. 236 */ 237 static int acpi_serialize_methods; 238 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 239 240 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 241 static int acpi_do_powerstate = 1; 242 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 243 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 244 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 245 246 /* Allow users to override quirks. */ 247 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 248 249 static int acpi_susp_bounce; 250 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 251 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 252 253 /* 254 * ACPI can only be loaded as a module by the loader; activating it after 255 * system bootstrap time is not useful, and can be fatal to the system. 256 * It also cannot be unloaded, since the entire system bus heirarchy hangs 257 * off it. 258 */ 259 static int 260 acpi_modevent(struct module *mod, int event, void *junk) 261 { 262 switch (event) { 263 case MOD_LOAD: 264 if (!cold) { 265 kprintf("The ACPI driver cannot be loaded after boot.\n"); 266 return (EPERM); 267 } 268 break; 269 case MOD_UNLOAD: 270 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 271 return (EBUSY); 272 break; 273 default: 274 break; 275 } 276 return (0); 277 } 278 279 /* 280 * Perform early initialization. 281 */ 282 ACPI_STATUS 283 acpi_Startup(void) 284 { 285 static int started = 0; 286 ACPI_STATUS status; 287 int val; 288 289 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 290 291 /* Only run the startup code once. The MADT driver also calls this. */ 292 if (started) 293 return_VALUE (AE_OK); 294 started = 1; 295 296 /* 297 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 298 * if more tables exist. 299 */ 300 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 301 kprintf("ACPI: Table initialisation failed: %s\n", 302 AcpiFormatException(status)); 303 return_VALUE (status); 304 } 305 306 /* Set up any quirks we have for this system. */ 307 #ifdef notyet 308 if (acpi_quirks == ACPI_Q_OK) 309 acpi_table_quirks(&acpi_quirks); 310 #endif 311 312 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 313 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 314 acpi_quirks &= ~ACPI_Q_BROKEN; 315 if (acpi_quirks & ACPI_Q_BROKEN) { 316 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 317 status = AE_SUPPORT; 318 } 319 320 return_VALUE (status); 321 } 322 323 /* 324 * Detect ACPI, perform early initialisation 325 */ 326 static void 327 acpi_identify(driver_t *driver, device_t parent) 328 { 329 device_t child; 330 331 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 332 333 if (!cold) 334 return_VOID; 335 336 /* Check that we haven't been disabled with a hint. */ 337 if (resource_disabled("acpi", 0)) 338 return_VOID; 339 340 /* Make sure we're not being doubly invoked. */ 341 if (device_find_child(parent, "acpi", 0) != NULL) 342 return_VOID; 343 344 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 345 346 /* Initialize root tables. */ 347 if (ACPI_FAILURE(acpi_Startup())) { 348 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 349 return_VOID; 350 } 351 352 /* Attach the actual ACPI device. */ 353 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 354 device_printf(parent, "device_identify failed\n"); 355 return_VOID; 356 } 357 } 358 359 /* 360 * Fetch some descriptive data from ACPI to put in our attach message. 361 */ 362 static int 363 acpi_probe(device_t dev) 364 { 365 ACPI_TABLE_RSDP *rsdp; 366 ACPI_TABLE_HEADER *rsdt; 367 ACPI_PHYSICAL_ADDRESS paddr; 368 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 369 struct sbuf sb; 370 371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 372 373 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 374 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 375 device_printf(dev, "probe failed, other PM system enabled.\n"); 376 return_VALUE (ENXIO); 377 } 378 379 if ((paddr = AcpiOsGetRootPointer()) == 0 || 380 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 381 return_VALUE (ENXIO); 382 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 383 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 384 else 385 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 386 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 387 388 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 389 return_VALUE (ENXIO); 390 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 391 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 392 sbuf_trim(&sb); 393 sbuf_putc(&sb, ' '); 394 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 395 sbuf_trim(&sb); 396 sbuf_finish(&sb); 397 device_set_desc_copy(dev, sbuf_data(&sb)); 398 sbuf_delete(&sb); 399 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 400 401 return_VALUE (0); 402 } 403 404 static int 405 acpi_attach(device_t dev) 406 { 407 struct acpi_softc *sc; 408 ACPI_STATUS status; 409 int error, state; 410 UINT32 flags; 411 UINT8 TypeA, TypeB; 412 char *env; 413 414 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 415 416 sc = device_get_softc(dev); 417 sc->acpi_dev = dev; 418 callout_init(&sc->susp_force_to); 419 420 if ((error = acpi_task_thread_init())) { 421 device_printf(dev, "Could not start task thread.\n"); 422 goto out; 423 } 424 425 error = ENXIO; 426 427 /* Initialize resource manager. */ 428 acpi_rman_io.rm_type = RMAN_ARRAY; 429 acpi_rman_io.rm_start = 0; 430 acpi_rman_io.rm_end = 0xffff; 431 acpi_rman_io.rm_descr = "ACPI I/O ports"; 432 if (rman_init(&acpi_rman_io, -1) != 0) 433 panic("acpi rman_init IO ports failed"); 434 acpi_rman_mem.rm_type = RMAN_ARRAY; 435 acpi_rman_mem.rm_start = 0; 436 acpi_rman_mem.rm_end = ~0ul; 437 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 438 if (rman_init(&acpi_rman_mem, -1) != 0) 439 panic("acpi rman_init memory failed"); 440 441 /* Initialise the ACPI mutex */ 442 ACPI_LOCK_INIT(acpi, "acpi"); 443 ACPI_SERIAL_INIT(acpi); 444 445 /* 446 * Set the globals from our tunables. This is needed because ACPI-CA 447 * uses UINT8 for some values and we have no tunable_byte. 448 */ 449 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 450 AcpiGbl_EnableInterpreterSlack = TRUE; 451 452 /* Start up the ACPI CA subsystem. */ 453 status = AcpiInitializeSubsystem(); 454 if (ACPI_FAILURE(status)) { 455 device_printf(dev, "Could not initialize Subsystem: %s\n", 456 AcpiFormatException(status)); 457 goto out; 458 } 459 460 /* Load ACPI name space. */ 461 status = AcpiLoadTables(); 462 if (ACPI_FAILURE(status)) { 463 device_printf(dev, "Could not load Namespace: %s\n", 464 AcpiFormatException(status)); 465 goto out; 466 } 467 468 /* Handle MCFG table if present. */ 469 acpi_enable_pcie(); 470 471 /* Install the default address space handlers. */ 472 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 473 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 474 if (ACPI_FAILURE(status)) { 475 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 476 AcpiFormatException(status)); 477 goto out; 478 } 479 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 480 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 481 if (ACPI_FAILURE(status)) { 482 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 483 AcpiFormatException(status)); 484 goto out; 485 } 486 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 487 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 488 if (ACPI_FAILURE(status)) { 489 device_printf(dev, "could not initialise PciConfig handler: %s\n", 490 AcpiFormatException(status)); 491 goto out; 492 } 493 494 /* 495 * Note that some systems (specifically, those with namespace evaluation 496 * issues that require the avoidance of parts of the namespace) must 497 * avoid running _INI and _STA on everything, as well as dodging the final 498 * object init pass. 499 * 500 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 501 * 502 * XXX We should arrange for the object init pass after we have attached 503 * all our child devices, but on many systems it works here. 504 */ 505 flags = 0; 506 if (ktestenv("debug.acpi.avoid")) 507 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 508 509 /* Bring the hardware and basic handlers online. */ 510 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 511 device_printf(dev, "Could not enable ACPI: %s\n", 512 AcpiFormatException(status)); 513 goto out; 514 } 515 516 /* 517 * Fix up the interrupt timer after enabling ACPI, so that the 518 * interrupt cputimer that choked by ACPI power management could 519 * be resurrected before probing various devices. 520 */ 521 DELAY(5000); 522 cputimer_intr_pmfixup(); 523 524 /* 525 * Call the ECDT probe function to provide EC functionality before 526 * the namespace has been evaluated. 527 * 528 * XXX This happens before the sysresource devices have been probed and 529 * attached so its resources come from nexus0. In practice, this isn't 530 * a problem but should be addressed eventually. 531 */ 532 acpi_ec_ecdt_probe(dev); 533 534 /* Bring device objects and regions online. */ 535 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 536 device_printf(dev, "Could not initialize ACPI objects: %s\n", 537 AcpiFormatException(status)); 538 goto out; 539 } 540 541 /* 542 * Setup our sysctl tree. 543 * 544 * XXX: This doesn't check to make sure that none of these fail. 545 */ 546 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 547 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 548 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 549 device_get_name(dev), CTLFLAG_RD, 0, ""); 550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 552 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 555 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 556 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 557 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 558 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 561 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 565 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 567 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 568 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 570 "sleep delay"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 573 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 577 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 578 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 579 OID_AUTO, "handle_reboot", CTLFLAG_RW, 580 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 581 582 /* 583 * Default to 1 second before sleeping to give some machines time to 584 * stabilize. 585 */ 586 sc->acpi_sleep_delay = 1; 587 if (bootverbose) 588 sc->acpi_verbose = 1; 589 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 590 if (strcmp(env, "0") != 0) 591 sc->acpi_verbose = 1; 592 kfreeenv(env); 593 } 594 595 /* Only enable reboot by default if the FADT says it is available. */ 596 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 597 sc->acpi_handle_reboot = 1; 598 599 /* Only enable S4BIOS by default if the FACS says it is available. */ 600 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 601 sc->acpi_s4bios = 1; 602 603 /* 604 * Dispatch the default sleep state to devices. The lid switch is set 605 * to NONE by default to avoid surprising users. 606 */ 607 sc->acpi_power_button_sx = ACPI_STATE_S5; 608 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 609 sc->acpi_standby_sx = ACPI_STATE_S1; 610 sc->acpi_suspend_sx = ACPI_STATE_S3; 611 612 /* Pick the first valid sleep state for the sleep button default. */ 613 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 614 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 615 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 616 sc->acpi_sleep_button_sx = state; 617 break; 618 } 619 620 acpi_enable_fixed_events(sc); 621 622 /* 623 * Scan the namespace and attach/initialise children. 624 */ 625 626 /* Register our shutdown handler. */ 627 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 628 SHUTDOWN_PRI_LAST); 629 630 /* 631 * Register our acpi event handlers. 632 * XXX should be configurable eg. via userland policy manager. 633 */ 634 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 635 sc, ACPI_EVENT_PRI_LAST); 636 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 637 sc, ACPI_EVENT_PRI_LAST); 638 639 /* Flag our initial states. */ 640 sc->acpi_enabled = 1; 641 sc->acpi_sstate = ACPI_STATE_S0; 642 sc->acpi_sleep_disabled = 0; 643 /* Create the control device */ 644 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, 645 "acpi"); 646 sc->acpi_dev_t->si_drv1 = sc; 647 648 if ((error = acpi_machdep_init(dev))) 649 goto out; 650 651 /* Register ACPI again to pass the correct argument of pm_func. */ 652 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 653 654 if (!acpi_disabled("bus")) 655 acpi_probe_children(dev); 656 657 /* Update all GPEs and enable runtime GPEs. */ 658 status = AcpiUpdateAllGpes(); 659 if (ACPI_FAILURE(status)) { 660 device_printf(dev, "Could not update all GPEs: %s\n", 661 AcpiFormatException(status)); 662 } 663 664 /* Allow sleep request after a while. */ 665 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 666 667 error = 0; 668 669 out: 670 cputimer_intr_pmfixup(); 671 return_VALUE (error); 672 } 673 674 static int 675 acpi_suspend(device_t dev) 676 { 677 device_t child, *devlist; 678 int error, i, numdevs, pstate; 679 680 GIANT_REQUIRED; 681 682 /* First give child devices a chance to suspend. */ 683 error = bus_generic_suspend(dev); 684 if (error) 685 return (error); 686 687 /* 688 * Now, set them into the appropriate power state, usually D3. If the 689 * device has an _SxD method for the next sleep state, use that power 690 * state instead. 691 */ 692 device_get_children(dev, &devlist, &numdevs); 693 for (i = 0; i < numdevs; i++) { 694 /* If the device is not attached, we've powered it down elsewhere. */ 695 child = devlist[i]; 696 if (!device_is_attached(child)) 697 continue; 698 699 /* 700 * Default to D3 for all sleep states. The _SxD method is optional 701 * so set the powerstate even if it's absent. 702 */ 703 pstate = PCI_POWERSTATE_D3; 704 error = acpi_device_pwr_for_sleep(device_get_parent(child), 705 child, &pstate); 706 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 707 pci_set_powerstate(child, pstate); 708 } 709 kfree(devlist, M_TEMP); 710 error = 0; 711 712 return (error); 713 } 714 715 static int 716 acpi_resume(device_t dev) 717 { 718 ACPI_HANDLE handle; 719 int i, numdevs; 720 device_t child, *devlist; 721 722 GIANT_REQUIRED; 723 724 /* 725 * Put all devices in D0 before resuming them. Call _S0D on each one 726 * since some systems expect this. 727 */ 728 device_get_children(dev, &devlist, &numdevs); 729 for (i = 0; i < numdevs; i++) { 730 child = devlist[i]; 731 handle = acpi_get_handle(child); 732 if (handle) 733 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 734 if (device_is_attached(child) && acpi_do_powerstate) 735 pci_set_powerstate(child, PCI_POWERSTATE_D0); 736 } 737 kfree(devlist, M_TEMP); 738 739 return (bus_generic_resume(dev)); 740 } 741 742 static int 743 acpi_shutdown(device_t dev) 744 { 745 746 GIANT_REQUIRED; 747 748 /* Allow children to shutdown first. */ 749 bus_generic_shutdown(dev); 750 751 /* 752 * Enable any GPEs that are able to power-on the system (i.e., RTC). 753 * Also, disable any that are not valid for this state (most). 754 */ 755 acpi_wake_prep_walk(ACPI_STATE_S5); 756 757 return (0); 758 } 759 760 /* 761 * Handle a new device being added 762 */ 763 static device_t 764 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 765 { 766 struct acpi_device *ad; 767 device_t child; 768 769 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 770 return (NULL); 771 772 resource_list_init(&ad->ad_rl); 773 child = device_add_child_ordered(parent, order, name, unit); 774 if (child != NULL) 775 device_set_ivars(child, ad); 776 else 777 kfree(ad, M_ACPIDEV); 778 return (child); 779 } 780 781 static int 782 acpi_print_child(device_t bus, device_t child) 783 { 784 struct acpi_device *adev = device_get_ivars(child); 785 struct resource_list *rl = &adev->ad_rl; 786 int retval = 0; 787 788 retval += bus_print_child_header(bus, child); 789 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 790 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 791 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 792 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 793 if (device_get_flags(child)) 794 retval += kprintf(" flags %#x", device_get_flags(child)); 795 retval += bus_print_child_footer(bus, child); 796 797 return (retval); 798 } 799 800 /* 801 * If this device is an ACPI child but no one claimed it, attempt 802 * to power it off. We'll power it back up when a driver is added. 803 * 804 * XXX Disabled for now since many necessary devices (like fdc and 805 * ATA) don't claim the devices we created for them but still expect 806 * them to be powered up. 807 */ 808 static void 809 acpi_probe_nomatch(device_t bus, device_t child) 810 { 811 812 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 813 } 814 815 /* 816 * If a new driver has a chance to probe a child, first power it up. 817 * 818 * XXX Disabled for now (see acpi_probe_nomatch for details). 819 */ 820 static void 821 acpi_driver_added(device_t dev, driver_t *driver) 822 { 823 device_t child, *devlist; 824 int i, numdevs; 825 826 DEVICE_IDENTIFY(driver, dev); 827 device_get_children(dev, &devlist, &numdevs); 828 for (i = 0; i < numdevs; i++) { 829 child = devlist[i]; 830 if (device_get_state(child) == DS_NOTPRESENT) { 831 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 832 if (device_probe_and_attach(child) != 0) 833 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 834 } 835 } 836 kfree(devlist, M_TEMP); 837 } 838 839 /* Location hint for devctl(8) */ 840 static int 841 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 842 size_t buflen) 843 { 844 struct acpi_device *dinfo = device_get_ivars(child); 845 846 if (dinfo->ad_handle) 847 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 848 else 849 ksnprintf(buf, buflen, "unknown"); 850 return (0); 851 } 852 853 /* PnP information for devctl(8) */ 854 static int 855 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 856 size_t buflen) 857 { 858 ACPI_DEVICE_INFO *adinfo; 859 struct acpi_device *dinfo = device_get_ivars(child); 860 char *end; 861 int error; 862 863 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo); 864 if (error) { 865 ksnprintf(buf, buflen, "unknown"); 866 } else { 867 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 868 (adinfo->Valid & ACPI_VALID_HID) ? 869 adinfo->HardwareId.String : "none", 870 (adinfo->Valid & ACPI_VALID_UID) ? 871 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 872 if (adinfo) 873 AcpiOsFree(adinfo); 874 } 875 return (0); 876 } 877 878 /* 879 * Handle per-device ivars 880 */ 881 static int 882 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 883 { 884 struct acpi_device *ad; 885 886 if ((ad = device_get_ivars(child)) == NULL) { 887 kprintf("device has no ivars\n"); 888 return (ENOENT); 889 } 890 891 /* ACPI and ISA compatibility ivars */ 892 switch(index) { 893 case ACPI_IVAR_HANDLE: 894 *(ACPI_HANDLE *)result = ad->ad_handle; 895 break; 896 case ACPI_IVAR_MAGIC: 897 *result = ad->ad_magic; 898 break; 899 case ACPI_IVAR_PRIVATE: 900 *(void **)result = ad->ad_private; 901 break; 902 case ACPI_IVAR_FLAGS: 903 *(int *)result = ad->ad_flags; 904 break; 905 case ISA_IVAR_VENDORID: 906 case ISA_IVAR_SERIAL: 907 case ISA_IVAR_COMPATID: 908 *(int *)result = -1; 909 break; 910 case ISA_IVAR_LOGICALID: 911 *(int *)result = acpi_isa_get_logicalid(child); 912 break; 913 default: 914 return (ENOENT); 915 } 916 917 return (0); 918 } 919 920 static int 921 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 922 { 923 struct acpi_device *ad; 924 925 if ((ad = device_get_ivars(child)) == NULL) { 926 kprintf("device has no ivars\n"); 927 return (ENOENT); 928 } 929 930 switch(index) { 931 case ACPI_IVAR_HANDLE: 932 ad->ad_handle = (ACPI_HANDLE)value; 933 break; 934 case ACPI_IVAR_MAGIC: 935 ad->ad_magic = value; 936 break; 937 case ACPI_IVAR_PRIVATE: 938 ad->ad_private = (void *)value; 939 break; 940 case ACPI_IVAR_FLAGS: 941 ad->ad_flags = (int)value; 942 break; 943 default: 944 panic("bad ivar write request (%d)", index); 945 return (ENOENT); 946 } 947 948 return (0); 949 } 950 951 /* 952 * Handle child resource allocation/removal 953 */ 954 static struct resource_list * 955 acpi_get_rlist(device_t dev, device_t child) 956 { 957 struct acpi_device *ad; 958 959 ad = device_get_ivars(child); 960 return (&ad->ad_rl); 961 } 962 963 /* 964 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 965 * duplicates, we merge any in the sysresource attach routine. 966 */ 967 static int 968 acpi_sysres_alloc(device_t dev) 969 { 970 struct resource *res; 971 struct resource_list *rl; 972 struct resource_list_entry *rle; 973 struct rman *rm; 974 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 975 device_t *children; 976 int child_count, i; 977 /* 978 * Probe/attach any sysresource devices. This would be unnecessary if we 979 * had multi-pass probe/attach. 980 */ 981 if (device_get_children(dev, &children, &child_count) != 0) 982 return (ENXIO); 983 for (i = 0; i < child_count; i++) { 984 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 985 device_probe_and_attach(children[i]); 986 } 987 kfree(children, M_TEMP); 988 989 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 990 if(!rl) 991 return 0; 992 SLIST_FOREACH(rle, rl, link) { 993 if (rle->res != NULL) { 994 device_printf(dev, "duplicate resource for %lx\n", rle->start); 995 continue; 996 } 997 998 /* Only memory and IO resources are valid here. */ 999 switch (rle->type) { 1000 case SYS_RES_IOPORT: 1001 rm = &acpi_rman_io; 1002 break; 1003 case SYS_RES_MEMORY: 1004 rm = &acpi_rman_mem; 1005 break; 1006 default: 1007 continue; 1008 } 1009 1010 /* Pre-allocate resource and add to our rman pool. */ 1011 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1012 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1013 0, -1); 1014 if (res != NULL) { 1015 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1016 rle->res = res; 1017 } else 1018 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1019 rle->start, rle->count, rle->type); 1020 } 1021 return (0); 1022 } 1023 1024 static struct resource * 1025 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1026 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1027 { 1028 ACPI_RESOURCE ares; 1029 struct acpi_device *ad = device_get_ivars(child); 1030 struct resource_list *rl = &ad->ad_rl; 1031 struct resource_list_entry *rle; 1032 struct resource *res; 1033 struct rman *rm; 1034 1035 res = NULL; 1036 1037 /* We only handle memory and IO resources through rman. */ 1038 switch (type) { 1039 case SYS_RES_IOPORT: 1040 rm = &acpi_rman_io; 1041 break; 1042 case SYS_RES_MEMORY: 1043 rm = &acpi_rman_mem; 1044 break; 1045 default: 1046 rm = NULL; 1047 } 1048 1049 ACPI_SERIAL_BEGIN(acpi); 1050 1051 /* 1052 * If this is an allocation of the "default" range for a given RID, and 1053 * we know what the resources for this device are (i.e., they're on the 1054 * child's resource list), use those start/end values. 1055 */ 1056 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1057 rle = resource_list_find(rl, type, *rid); 1058 if (rle == NULL) 1059 goto out; 1060 start = rle->start; 1061 end = rle->end; 1062 count = rle->count; 1063 cpuid = rle->cpuid; 1064 } 1065 1066 /* 1067 * If this is an allocation of a specific range, see if we can satisfy 1068 * the request from our system resource regions. If we can't, pass the 1069 * request up to the parent. 1070 */ 1071 if (start + count - 1 == end && rm != NULL) 1072 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1073 child); 1074 if (res == NULL) { 1075 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1076 start, end, count, flags, cpuid); 1077 } else { 1078 rman_set_rid(res, *rid); 1079 1080 /* If requested, activate the resource using the parent's method. */ 1081 if (flags & RF_ACTIVE) 1082 if (bus_activate_resource(child, type, *rid, res) != 0) { 1083 rman_release_resource(res); 1084 res = NULL; 1085 goto out; 1086 } 1087 } 1088 1089 if (res != NULL && device_get_parent(child) == bus) 1090 switch (type) { 1091 case SYS_RES_IRQ: 1092 /* 1093 * Since bus_config_intr() takes immediate effect, we cannot 1094 * configure the interrupt associated with a device when we 1095 * parse the resources but have to defer it until a driver 1096 * actually allocates the interrupt via bus_alloc_resource(). 1097 * 1098 * XXX: Should we handle the lookup failing? 1099 */ 1100 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1101 acpi_config_intr(child, &ares); 1102 else 1103 kprintf("irq resource not found\n"); 1104 break; 1105 } 1106 1107 out: 1108 ACPI_SERIAL_END(acpi); 1109 return (res); 1110 } 1111 1112 static int 1113 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1114 struct resource *r) 1115 { 1116 struct rman *rm; 1117 int ret; 1118 1119 /* We only handle memory and IO resources through rman. */ 1120 switch (type) { 1121 case SYS_RES_IOPORT: 1122 rm = &acpi_rman_io; 1123 break; 1124 case SYS_RES_MEMORY: 1125 rm = &acpi_rman_mem; 1126 break; 1127 default: 1128 rm = NULL; 1129 } 1130 1131 ACPI_SERIAL_BEGIN(acpi); 1132 1133 /* 1134 * If this resource belongs to one of our internal managers, 1135 * deactivate it and release it to the local pool. If it doesn't, 1136 * pass this request up to the parent. 1137 */ 1138 if (rm != NULL && rman_is_region_manager(r, rm)) { 1139 if (rman_get_flags(r) & RF_ACTIVE) { 1140 ret = bus_deactivate_resource(child, type, rid, r); 1141 if (ret != 0) 1142 goto out; 1143 } 1144 ret = rman_release_resource(r); 1145 } else 1146 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1147 1148 out: 1149 ACPI_SERIAL_END(acpi); 1150 return (ret); 1151 } 1152 1153 static void 1154 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1155 { 1156 struct resource_list *rl; 1157 1158 rl = acpi_get_rlist(bus, child); 1159 resource_list_delete(rl, type, rid); 1160 } 1161 1162 /* Allocate an IO port or memory resource, given its GAS. */ 1163 int 1164 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1165 struct resource **res, u_int flags) 1166 { 1167 int error, res_type; 1168 1169 error = ENOMEM; 1170 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1171 return (EINVAL); 1172 1173 /* We only support memory and IO spaces. */ 1174 switch (gas->SpaceId) { 1175 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1176 res_type = SYS_RES_MEMORY; 1177 break; 1178 case ACPI_ADR_SPACE_SYSTEM_IO: 1179 res_type = SYS_RES_IOPORT; 1180 break; 1181 default: 1182 return (EOPNOTSUPP); 1183 } 1184 1185 /* 1186 * If the register width is less than 8, assume the BIOS author means 1187 * it is a bit field and just allocate a byte. 1188 */ 1189 if (gas->BitWidth && gas->BitWidth < 8) 1190 gas->BitWidth = 8; 1191 1192 /* Validate the address after we're sure we support the space. */ 1193 if (gas->Address == 0 || gas->BitWidth == 0) 1194 return (EINVAL); 1195 1196 bus_set_resource(dev, res_type, *rid, gas->Address, 1197 gas->BitWidth / 8, -1); 1198 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1199 if (*res != NULL) { 1200 *type = res_type; 1201 error = 0; 1202 } else 1203 bus_delete_resource(dev, res_type, *rid); 1204 1205 return (error); 1206 } 1207 1208 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1209 static uint32_t 1210 acpi_isa_get_logicalid(device_t dev) 1211 { 1212 ACPI_DEVICE_INFO *devinfo; 1213 ACPI_HANDLE h; 1214 ACPI_STATUS error; 1215 u_int32_t pnpid; 1216 1217 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1218 1219 devinfo = NULL; 1220 pnpid = 0; 1221 1222 /* Fetch and validate the HID. */ 1223 if ((h = acpi_get_handle(dev)) == NULL) 1224 goto out; 1225 error = AcpiGetObjectInfo(h, &devinfo); 1226 if (ACPI_FAILURE(error)) 1227 goto out; 1228 1229 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1230 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1231 1232 out: 1233 if (devinfo) 1234 AcpiOsFree(devinfo); 1235 return_VALUE (pnpid); 1236 } 1237 1238 static int 1239 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1240 { 1241 ACPI_DEVICE_INFO *devinfo; 1242 ACPI_HANDLE h; 1243 ACPI_STATUS error; 1244 uint32_t *pnpid; 1245 int valid, i; 1246 1247 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1248 1249 devinfo = NULL; 1250 pnpid = cids; 1251 valid = 0; 1252 1253 /* Fetch and validate the CID */ 1254 if ((h = acpi_get_handle(dev)) == NULL) 1255 goto out; 1256 error = AcpiGetObjectInfo(h, &devinfo); 1257 if (ACPI_FAILURE(error)) 1258 goto out; 1259 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1260 goto out; 1261 1262 if (devinfo->CompatibleIdList.Count < count) 1263 count = devinfo->CompatibleIdList.Count; 1264 for (i = 0; i < count; i++) { 1265 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1266 continue; 1267 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1268 valid++; 1269 } 1270 1271 out: 1272 if (devinfo) 1273 AcpiOsFree(devinfo); 1274 return_VALUE (valid); 1275 } 1276 1277 static char * 1278 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1279 { 1280 ACPI_HANDLE h; 1281 int i; 1282 1283 h = acpi_get_handle(dev); 1284 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1285 return (NULL); 1286 1287 /* Try to match one of the array of IDs with a HID or CID. */ 1288 for (i = 0; ids[i] != NULL; i++) { 1289 if (acpi_MatchHid(h, ids[i])) 1290 return (ids[i]); 1291 } 1292 return (NULL); 1293 } 1294 1295 static ACPI_STATUS 1296 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1297 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1298 { 1299 ACPI_HANDLE h; 1300 1301 if (dev == NULL) 1302 h = ACPI_ROOT_OBJECT; 1303 else if ((h = acpi_get_handle(dev)) == NULL) 1304 return (AE_BAD_PARAMETER); 1305 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1306 } 1307 1308 static int 1309 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1310 { 1311 struct acpi_softc *sc; 1312 ACPI_HANDLE handle; 1313 ACPI_STATUS status; 1314 char sxd[8]; 1315 int error; 1316 1317 sc = device_get_softc(bus); 1318 handle = acpi_get_handle(dev); 1319 1320 /* 1321 * XXX If we find these devices, don't try to power them down. 1322 * The serial and IRDA ports on my T23 hang the system when 1323 * set to D3 and it appears that such legacy devices may 1324 * need special handling in their drivers. 1325 */ 1326 if (handle == NULL || 1327 acpi_MatchHid(handle, "PNP0500") || 1328 acpi_MatchHid(handle, "PNP0501") || 1329 acpi_MatchHid(handle, "PNP0502") || 1330 acpi_MatchHid(handle, "PNP0510") || 1331 acpi_MatchHid(handle, "PNP0511")) 1332 return (ENXIO); 1333 1334 /* 1335 * Override next state with the value from _SxD, if present. If no 1336 * dstate argument was provided, don't fetch the return value. 1337 */ 1338 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1339 if (dstate) 1340 status = acpi_GetInteger(handle, sxd, dstate); 1341 else 1342 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1343 1344 switch (status) { 1345 case AE_OK: 1346 error = 0; 1347 break; 1348 case AE_NOT_FOUND: 1349 error = ESRCH; 1350 break; 1351 default: 1352 error = ENXIO; 1353 break; 1354 } 1355 1356 return (error); 1357 } 1358 1359 /* Callback arg for our implementation of walking the namespace. */ 1360 struct acpi_device_scan_ctx { 1361 acpi_scan_cb_t user_fn; 1362 void *arg; 1363 ACPI_HANDLE parent; 1364 }; 1365 1366 static ACPI_STATUS 1367 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1368 { 1369 struct acpi_device_scan_ctx *ctx; 1370 device_t dev, old_dev; 1371 ACPI_STATUS status; 1372 ACPI_OBJECT_TYPE type; 1373 1374 /* 1375 * Skip this device if we think we'll have trouble with it or it is 1376 * the parent where the scan began. 1377 */ 1378 ctx = (struct acpi_device_scan_ctx *)arg; 1379 if (acpi_avoid(h) || h == ctx->parent) 1380 return (AE_OK); 1381 1382 /* If this is not a valid device type (e.g., a method), skip it. */ 1383 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1384 return (AE_OK); 1385 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1386 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1387 return (AE_OK); 1388 1389 /* 1390 * Call the user function with the current device. If it is unchanged 1391 * afterwards, return. Otherwise, we update the handle to the new dev. 1392 */ 1393 old_dev = acpi_get_device(h); 1394 dev = old_dev; 1395 status = ctx->user_fn(h, &dev, level, ctx->arg); 1396 if (ACPI_FAILURE(status) || old_dev == dev) 1397 return (status); 1398 1399 /* Remove the old child and its connection to the handle. */ 1400 if (old_dev != NULL) { 1401 device_delete_child(device_get_parent(old_dev), old_dev); 1402 AcpiDetachData(h, acpi_fake_objhandler); 1403 } 1404 1405 /* Recreate the handle association if the user created a device. */ 1406 if (dev != NULL) 1407 AcpiAttachData(h, acpi_fake_objhandler, dev); 1408 1409 return (AE_OK); 1410 } 1411 1412 static ACPI_STATUS 1413 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1414 acpi_scan_cb_t user_fn, void *arg) 1415 { 1416 ACPI_HANDLE h; 1417 struct acpi_device_scan_ctx ctx; 1418 1419 if (acpi_disabled("children")) 1420 return (AE_OK); 1421 1422 if (dev == NULL) 1423 h = ACPI_ROOT_OBJECT; 1424 else if ((h = acpi_get_handle(dev)) == NULL) 1425 return (AE_BAD_PARAMETER); 1426 ctx.user_fn = user_fn; 1427 ctx.arg = arg; 1428 ctx.parent = h; 1429 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1430 acpi_device_scan_cb, NULL, &ctx, NULL)); 1431 } 1432 1433 /* 1434 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1435 * device power states since it's close enough to ACPI. 1436 */ 1437 static int 1438 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1439 { 1440 ACPI_HANDLE h; 1441 ACPI_STATUS status; 1442 int error; 1443 1444 error = 0; 1445 h = acpi_get_handle(child); 1446 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1447 return (EINVAL); 1448 if (h == NULL) 1449 return (0); 1450 1451 /* Ignore errors if the power methods aren't present. */ 1452 status = acpi_pwr_switch_consumer(h, state); 1453 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1454 && status != AE_BAD_PARAMETER) 1455 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1456 state, acpi_name(h), AcpiFormatException(status)); 1457 1458 return (error); 1459 } 1460 1461 static int 1462 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1463 { 1464 int result, cid_count, i; 1465 uint32_t lid, cids[8]; 1466 1467 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1468 1469 /* 1470 * ISA-style drivers attached to ACPI may persist and 1471 * probe manually if we return ENOENT. We never want 1472 * that to happen, so don't ever return it. 1473 */ 1474 result = ENXIO; 1475 1476 /* Scan the supplied IDs for a match */ 1477 lid = acpi_isa_get_logicalid(child); 1478 cid_count = acpi_isa_get_compatid(child, cids, 8); 1479 while (ids && ids->ip_id) { 1480 if (lid == ids->ip_id) { 1481 result = 0; 1482 goto out; 1483 } 1484 for (i = 0; i < cid_count; i++) { 1485 if (cids[i] == ids->ip_id) { 1486 result = 0; 1487 goto out; 1488 } 1489 } 1490 ids++; 1491 } 1492 1493 out: 1494 if (result == 0 && ids->ip_desc) 1495 device_set_desc(child, ids->ip_desc); 1496 1497 return_VALUE (result); 1498 } 1499 1500 /* 1501 * Look for a MCFG table. If it is present, use the settings for 1502 * domain (segment) 0 to setup PCI config space access via the memory 1503 * map. 1504 */ 1505 static void 1506 acpi_enable_pcie(void) 1507 { 1508 ACPI_TABLE_HEADER *hdr; 1509 ACPI_MCFG_ALLOCATION *alloc, *end; 1510 ACPI_STATUS status; 1511 1512 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1513 if (ACPI_FAILURE(status)) 1514 return; 1515 1516 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1517 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1518 while (alloc < end) { 1519 if (alloc->PciSegment == 0) { 1520 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1521 alloc->EndBusNumber); 1522 return; 1523 } 1524 alloc++; 1525 } 1526 } 1527 1528 /* 1529 * Scan all of the ACPI namespace and attach child devices. 1530 * 1531 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1532 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1533 * However, in violation of the spec, some systems place their PCI link 1534 * devices in \, so we have to walk the whole namespace. We check the 1535 * type of namespace nodes, so this should be ok. 1536 */ 1537 static void 1538 acpi_probe_children(device_t bus) 1539 { 1540 1541 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1542 1543 /* 1544 * Scan the namespace and insert placeholders for all the devices that 1545 * we find. We also probe/attach any early devices. 1546 * 1547 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1548 * we want to create nodes for all devices, not just those that are 1549 * currently present. (This assumes that we don't want to create/remove 1550 * devices as they appear, which might be smarter.) 1551 */ 1552 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1553 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1554 acpi_probe_child, NULL, bus, NULL); 1555 1556 /* Pre-allocate resources for our rman from any sysresource devices. */ 1557 acpi_sysres_alloc(bus); 1558 /* Create any static children by calling device identify methods. */ 1559 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1560 bus_generic_probe(bus); 1561 1562 /* Probe/attach all children, created staticly and from the namespace. */ 1563 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1564 bus_generic_attach(bus); 1565 1566 /* 1567 * Some of these children may have attached others as part of their attach 1568 * process (eg. the root PCI bus driver), so rescan. 1569 */ 1570 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1571 bus_generic_attach(bus); 1572 1573 /* Attach wake sysctls. */ 1574 acpi_wake_sysctl_walk(bus); 1575 1576 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1577 return_VOID; 1578 } 1579 1580 /* 1581 * Determine the probe order for a given device. 1582 */ 1583 static void 1584 acpi_probe_order(ACPI_HANDLE handle, int *order) 1585 { 1586 ACPI_OBJECT_TYPE type; 1587 1588 /* 1589 * 1. I/O port and memory system resource holders 1590 * 2. Embedded controllers (to handle early accesses) 1591 * 3. PCI Link Devices 1592 * 100000. CPUs 1593 */ 1594 AcpiGetType(handle, &type); 1595 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1596 *order = 1; 1597 else if (acpi_MatchHid(handle, "PNP0C09")) 1598 *order = 2; 1599 else if (acpi_MatchHid(handle, "PNP0C0F")) 1600 *order = 3; 1601 else if (type == ACPI_TYPE_PROCESSOR) 1602 *order = 100000; 1603 } 1604 1605 /* 1606 * Evaluate a child device and determine whether we might attach a device to 1607 * it. 1608 */ 1609 static ACPI_STATUS 1610 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1611 { 1612 struct acpi_prw_data prw; 1613 ACPI_OBJECT_TYPE type; 1614 ACPI_HANDLE h; 1615 device_t bus, child; 1616 int order; 1617 char *handle_str; 1618 1619 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1620 1621 if (acpi_disabled("children")) 1622 return_ACPI_STATUS (AE_OK); 1623 1624 /* Skip this device if we think we'll have trouble with it. */ 1625 if (acpi_avoid(handle)) 1626 return_ACPI_STATUS (AE_OK); 1627 1628 bus = (device_t)context; 1629 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1630 handle_str = acpi_name(handle); 1631 switch (type) { 1632 case ACPI_TYPE_DEVICE: 1633 /* 1634 * Since we scan from \, be sure to skip system scope objects. 1635 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1636 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1637 * during the intialization and \_TZ_ is to support Notify() on it. 1638 */ 1639 if (strcmp(handle_str, "\\_SB_") == 0 || 1640 strcmp(handle_str, "\\_TZ_") == 0) 1641 break; 1642 1643 if (acpi_parse_prw(handle, &prw) == 0) 1644 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1645 1646 /* FALLTHROUGH */ 1647 case ACPI_TYPE_PROCESSOR: 1648 case ACPI_TYPE_THERMAL: 1649 case ACPI_TYPE_POWER: 1650 /* 1651 * Create a placeholder device for this node. Sort the 1652 * placeholder so that the probe/attach passes will run 1653 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1654 * are reserved for special objects (i.e., system 1655 * resources). CPU devices have a very high order to 1656 * ensure they are probed after other devices. 1657 */ 1658 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1659 order = level * 10 + 100; 1660 acpi_probe_order(handle, &order); 1661 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1662 if (child == NULL) 1663 break; 1664 1665 /* Associate the handle with the device_t and vice versa. */ 1666 acpi_set_handle(child, handle); 1667 AcpiAttachData(handle, acpi_fake_objhandler, child); 1668 1669 /* 1670 * Check that the device is present. If it's not present, 1671 * leave it disabled (so that we have a device_t attached to 1672 * the handle, but we don't probe it). 1673 * 1674 * XXX PCI link devices sometimes report "present" but not 1675 * "functional" (i.e. if disabled). Go ahead and probe them 1676 * anyway since we may enable them later. 1677 */ 1678 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1679 /* Never disable PCI link devices. */ 1680 if (acpi_MatchHid(handle, "PNP0C0F")) 1681 break; 1682 /* 1683 * Docking stations should remain enabled since the system 1684 * may be undocked at boot. 1685 */ 1686 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1687 break; 1688 1689 device_disable(child); 1690 break; 1691 } 1692 1693 /* 1694 * Get the device's resource settings and attach them. 1695 * Note that if the device has _PRS but no _CRS, we need 1696 * to decide when it's appropriate to try to configure the 1697 * device. Ignore the return value here; it's OK for the 1698 * device not to have any resources. 1699 */ 1700 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1701 break; 1702 } 1703 } 1704 1705 return_ACPI_STATUS (AE_OK); 1706 } 1707 1708 /* 1709 * AcpiAttachData() requires an object handler but never uses it. This is a 1710 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1711 */ 1712 void 1713 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1714 { 1715 } 1716 1717 static void 1718 acpi_shutdown_final(void *arg, int howto) 1719 { 1720 struct acpi_softc *sc; 1721 ACPI_STATUS status; 1722 1723 /* 1724 * XXX Shutdown code should only run on the BSP (cpuid 0). 1725 * Some chipsets do not power off the system correctly if called from 1726 * an AP. 1727 */ 1728 sc = arg; 1729 if ((howto & RB_POWEROFF) != 0) { 1730 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1731 if (ACPI_FAILURE(status)) { 1732 kprintf("AcpiEnterSleepStatePrep failed - %s\n", 1733 AcpiFormatException(status)); 1734 return; 1735 } 1736 kprintf("Powering system off using ACPI\n"); 1737 ACPI_DISABLE_IRQS(); 1738 status = AcpiEnterSleepState(ACPI_STATE_S5); 1739 if (ACPI_FAILURE(status)) { 1740 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1741 } else { 1742 DELAY(1000000); 1743 kprintf("ACPI power-off failed - timeout\n"); 1744 } 1745 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1746 /* Reboot using the reset register. */ 1747 status = AcpiReset(); 1748 if (ACPI_FAILURE(status)) { 1749 if (status != AE_NOT_EXIST) 1750 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1751 } else { 1752 DELAY(1000000); 1753 kprintf("ACPI reset failed - timeout\n"); 1754 } 1755 } else if (sc->acpi_do_disable && panicstr == NULL) { 1756 /* 1757 * Only disable ACPI if the user requested. On some systems, writing 1758 * the disable value to SMI_CMD hangs the system. 1759 */ 1760 kprintf("Shutting down ACPI\n"); 1761 AcpiTerminate(); 1762 } 1763 } 1764 1765 static void 1766 acpi_enable_fixed_events(struct acpi_softc *sc) 1767 { 1768 static int first_time = 1; 1769 1770 /* Enable and clear fixed events and install handlers. */ 1771 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1772 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1773 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1774 acpi_event_power_button_sleep, sc); 1775 if (first_time) 1776 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1777 } 1778 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1779 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1780 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1781 acpi_event_sleep_button_sleep, sc); 1782 if (first_time) 1783 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1784 } 1785 1786 first_time = 0; 1787 } 1788 1789 /* 1790 * Returns true if the device is actually present and should 1791 * be attached to. This requires the present, enabled, UI-visible 1792 * and diagnostics-passed bits to be set. 1793 */ 1794 BOOLEAN 1795 acpi_DeviceIsPresent(device_t dev) 1796 { 1797 ACPI_DEVICE_INFO *devinfo; 1798 ACPI_HANDLE h; 1799 ACPI_STATUS error; 1800 int ret; 1801 1802 ret = FALSE; 1803 if ((h = acpi_get_handle(dev)) == NULL) 1804 return (FALSE); 1805 error = AcpiGetObjectInfo(h, &devinfo); 1806 if (ACPI_FAILURE(error)) 1807 return (FALSE); 1808 1809 /* If no _STA method, must be present */ 1810 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1811 ret = TRUE; 1812 1813 /* Return true for 'present' and 'functioning' */ 1814 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1815 ret = TRUE; 1816 1817 AcpiOsFree(devinfo); 1818 return (ret); 1819 } 1820 1821 /* 1822 * Returns true if the battery is actually present and inserted. 1823 */ 1824 BOOLEAN 1825 acpi_BatteryIsPresent(device_t dev) 1826 { 1827 ACPI_DEVICE_INFO *devinfo; 1828 ACPI_HANDLE h; 1829 ACPI_STATUS error; 1830 int ret; 1831 1832 ret = FALSE; 1833 if ((h = acpi_get_handle(dev)) == NULL) 1834 return (FALSE); 1835 error = AcpiGetObjectInfo(h, &devinfo); 1836 if (ACPI_FAILURE(error)) 1837 return (FALSE); 1838 1839 /* If no _STA method, must be present */ 1840 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1841 ret = TRUE; 1842 1843 /* Return true for 'present', 'battery present', and 'functioning' */ 1844 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1845 ret = TRUE; 1846 1847 AcpiOsFree(devinfo); 1848 return (ret); 1849 } 1850 1851 /* 1852 * Match a HID string against a handle 1853 */ 1854 BOOLEAN 1855 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1856 { 1857 ACPI_DEVICE_INFO *devinfo; 1858 ACPI_STATUS error; 1859 int ret, i; 1860 1861 ret = FALSE; 1862 if (hid == NULL || h == NULL) 1863 return (ret); 1864 error = AcpiGetObjectInfo(h, &devinfo); 1865 if (ACPI_FAILURE(error)) 1866 return (ret); 1867 1868 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1869 strcmp(hid, devinfo->HardwareId.String) == 0) 1870 ret = TRUE; 1871 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1872 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1873 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1874 ret = TRUE; 1875 break; 1876 } 1877 } 1878 } 1879 1880 AcpiOsFree(devinfo); 1881 return (ret); 1882 } 1883 1884 /* 1885 * Return the handle of a named object within our scope, ie. that of (parent) 1886 * or one if its parents. 1887 */ 1888 ACPI_STATUS 1889 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1890 { 1891 ACPI_HANDLE r; 1892 ACPI_STATUS status; 1893 1894 /* Walk back up the tree to the root */ 1895 for (;;) { 1896 status = AcpiGetHandle(parent, path, &r); 1897 if (ACPI_SUCCESS(status)) { 1898 *result = r; 1899 return (AE_OK); 1900 } 1901 /* XXX Return error here? */ 1902 if (status != AE_NOT_FOUND) 1903 return (AE_OK); 1904 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1905 return (AE_NOT_FOUND); 1906 parent = r; 1907 } 1908 } 1909 1910 /* 1911 * Allocate a buffer with a preset data size. 1912 */ 1913 ACPI_BUFFER * 1914 acpi_AllocBuffer(int size) 1915 { 1916 ACPI_BUFFER *buf; 1917 1918 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1919 return (NULL); 1920 buf->Length = size; 1921 buf->Pointer = (void *)(buf + 1); 1922 return (buf); 1923 } 1924 1925 ACPI_STATUS 1926 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1927 { 1928 ACPI_OBJECT arg1; 1929 ACPI_OBJECT_LIST args; 1930 1931 arg1.Type = ACPI_TYPE_INTEGER; 1932 arg1.Integer.Value = number; 1933 args.Count = 1; 1934 args.Pointer = &arg1; 1935 1936 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1937 } 1938 1939 /* 1940 * Evaluate a path that should return an integer. 1941 */ 1942 ACPI_STATUS 1943 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1944 { 1945 ACPI_STATUS status; 1946 ACPI_BUFFER buf; 1947 ACPI_OBJECT param; 1948 1949 if (handle == NULL) 1950 handle = ACPI_ROOT_OBJECT; 1951 1952 /* 1953 * Assume that what we've been pointed at is an Integer object, or 1954 * a method that will return an Integer. 1955 */ 1956 buf.Pointer = ¶m; 1957 buf.Length = sizeof(param); 1958 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1959 if (ACPI_SUCCESS(status)) { 1960 if (param.Type == ACPI_TYPE_INTEGER) 1961 *number = param.Integer.Value; 1962 else 1963 status = AE_TYPE; 1964 } 1965 1966 /* 1967 * In some applications, a method that's expected to return an Integer 1968 * may instead return a Buffer (probably to simplify some internal 1969 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1970 * convert it into an Integer as best we can. 1971 * 1972 * This is a hack. 1973 */ 1974 if (status == AE_BUFFER_OVERFLOW) { 1975 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1976 status = AE_NO_MEMORY; 1977 } else { 1978 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1979 if (ACPI_SUCCESS(status)) 1980 status = acpi_ConvertBufferToInteger(&buf, number); 1981 AcpiOsFree(buf.Pointer); 1982 } 1983 } 1984 return (status); 1985 } 1986 1987 ACPI_STATUS 1988 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1989 { 1990 ACPI_OBJECT *p; 1991 UINT8 *val; 1992 int i; 1993 1994 p = (ACPI_OBJECT *)bufp->Pointer; 1995 if (p->Type == ACPI_TYPE_INTEGER) { 1996 *number = p->Integer.Value; 1997 return (AE_OK); 1998 } 1999 if (p->Type != ACPI_TYPE_BUFFER) 2000 return (AE_TYPE); 2001 if (p->Buffer.Length > sizeof(int)) 2002 return (AE_BAD_DATA); 2003 2004 *number = 0; 2005 val = p->Buffer.Pointer; 2006 for (i = 0; i < p->Buffer.Length; i++) 2007 *number += val[i] << (i * 8); 2008 return (AE_OK); 2009 } 2010 2011 /* 2012 * Iterate over the elements of an a package object, calling the supplied 2013 * function for each element. 2014 * 2015 * XXX possible enhancement might be to abort traversal on error. 2016 */ 2017 ACPI_STATUS 2018 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2019 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2020 { 2021 ACPI_OBJECT *comp; 2022 int i; 2023 2024 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2025 return (AE_BAD_PARAMETER); 2026 2027 /* Iterate over components */ 2028 i = 0; 2029 comp = pkg->Package.Elements; 2030 for (; i < pkg->Package.Count; i++, comp++) 2031 func(comp, arg); 2032 2033 return (AE_OK); 2034 } 2035 2036 /* 2037 * Find the (index)th resource object in a set. 2038 */ 2039 ACPI_STATUS 2040 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2041 { 2042 ACPI_RESOURCE *rp; 2043 int i; 2044 2045 rp = (ACPI_RESOURCE *)buf->Pointer; 2046 i = index; 2047 while (i-- > 0) { 2048 /* Range check */ 2049 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2050 return (AE_BAD_PARAMETER); 2051 2052 /* Check for terminator */ 2053 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2054 return (AE_NOT_FOUND); 2055 rp = ACPI_NEXT_RESOURCE(rp); 2056 } 2057 if (resp != NULL) 2058 *resp = rp; 2059 2060 return (AE_OK); 2061 } 2062 2063 /* 2064 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2065 * 2066 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2067 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2068 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2069 * resources. 2070 */ 2071 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2072 2073 ACPI_STATUS 2074 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2075 { 2076 ACPI_RESOURCE *rp; 2077 void *newp; 2078 2079 /* Initialise the buffer if necessary. */ 2080 if (buf->Pointer == NULL) { 2081 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2082 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2083 return (AE_NO_MEMORY); 2084 rp = (ACPI_RESOURCE *)buf->Pointer; 2085 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2086 rp->Length = 0; 2087 } 2088 if (res == NULL) 2089 return (AE_OK); 2090 2091 /* 2092 * Scan the current buffer looking for the terminator. 2093 * This will either find the terminator or hit the end 2094 * of the buffer and return an error. 2095 */ 2096 rp = (ACPI_RESOURCE *)buf->Pointer; 2097 for (;;) { 2098 /* Range check, don't go outside the buffer */ 2099 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2100 return (AE_BAD_PARAMETER); 2101 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2102 break; 2103 rp = ACPI_NEXT_RESOURCE(rp); 2104 } 2105 2106 /* 2107 * Check the size of the buffer and expand if required. 2108 * 2109 * Required size is: 2110 * size of existing resources before terminator + 2111 * size of new resource and header + 2112 * size of terminator. 2113 * 2114 * Note that this loop should really only run once, unless 2115 * for some reason we are stuffing a *really* huge resource. 2116 */ 2117 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2118 res->Length + ACPI_RS_SIZE_NO_DATA + 2119 ACPI_RS_SIZE_MIN) >= buf->Length) { 2120 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2121 return (AE_NO_MEMORY); 2122 bcopy(buf->Pointer, newp, buf->Length); 2123 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2124 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2125 AcpiOsFree(buf->Pointer); 2126 buf->Pointer = newp; 2127 buf->Length += buf->Length; 2128 } 2129 2130 /* Insert the new resource. */ 2131 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2132 2133 /* And add the terminator. */ 2134 rp = ACPI_NEXT_RESOURCE(rp); 2135 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2136 rp->Length = 0; 2137 2138 return (AE_OK); 2139 } 2140 2141 /* 2142 * Set interrupt model. 2143 */ 2144 ACPI_STATUS 2145 acpi_SetIntrModel(int model) 2146 { 2147 2148 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2149 } 2150 2151 /* 2152 * DEPRECATED. This interface has serious deficiencies and will be 2153 * removed. 2154 * 2155 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2156 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2157 */ 2158 ACPI_STATUS 2159 acpi_SetSleepState(struct acpi_softc *sc, int state) 2160 { 2161 static int once; 2162 2163 if (!once) { 2164 kprintf( 2165 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2166 once = 1; 2167 } 2168 return (acpi_EnterSleepState(sc, state)); 2169 } 2170 2171 static void 2172 acpi_sleep_force(void *arg) 2173 { 2174 struct acpi_softc *sc; 2175 2176 kprintf("acpi: suspend request timed out, forcing sleep now\n"); 2177 sc = arg; 2178 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2179 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2180 } 2181 2182 /* 2183 * Request that the system enter the given suspend state. All /dev/apm 2184 * devices and devd(8) will be notified. Userland then has a chance to 2185 * save state and acknowledge the request. The system sleeps once all 2186 * acks are in. 2187 */ 2188 int 2189 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2190 { 2191 #ifdef notyet 2192 struct apm_clone_data *clone; 2193 #endif 2194 2195 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2196 return (EINVAL); 2197 2198 /* S5 (soft-off) should be entered directly with no waiting. */ 2199 if (state == ACPI_STATE_S5) { 2200 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2201 return (0); 2202 else 2203 return (ENXIO); 2204 } 2205 2206 #if !defined(__i386__) 2207 /* This platform does not support acpi suspend/resume. */ 2208 return (EOPNOTSUPP); 2209 #endif 2210 2211 /* If a suspend request is already in progress, just return. */ 2212 ACPI_LOCK(acpi); 2213 if (sc->acpi_next_sstate != 0) { 2214 ACPI_UNLOCK(acpi); 2215 return (0); 2216 } 2217 2218 /* Record the pending state and notify all apm devices. */ 2219 sc->acpi_next_sstate = state; 2220 #if 0 2221 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2222 clone->notify_status = APM_EV_NONE; 2223 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2224 KNOTE(&clone->sel_read.si_note, 0); 2225 } 2226 } 2227 #endif 2228 2229 /* If devd(8) is not running, immediately enter the sleep state. */ 2230 if (devctl_process_running() == FALSE) { 2231 ACPI_UNLOCK(acpi); 2232 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2233 return (0); 2234 } else { 2235 return (ENXIO); 2236 } 2237 } 2238 2239 /* Now notify devd(8) also. */ 2240 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2241 2242 /* 2243 * Set a timeout to fire if userland doesn't ack the suspend request 2244 * in time. This way we still eventually go to sleep if we were 2245 * overheating or running low on battery, even if userland is hung. 2246 * We cancel this timeout once all userland acks are in or the 2247 * suspend request is aborted. 2248 */ 2249 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2250 ACPI_UNLOCK(acpi); 2251 return (0); 2252 } 2253 2254 /* 2255 * Acknowledge (or reject) a pending sleep state. The caller has 2256 * prepared for suspend and is now ready for it to proceed. If the 2257 * error argument is non-zero, it indicates suspend should be cancelled 2258 * and gives an errno value describing why. Once all votes are in, 2259 * we suspend the system. 2260 */ 2261 int 2262 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2263 { 2264 struct acpi_softc *sc; 2265 int ret, sleeping; 2266 2267 #if !defined(__i386__) 2268 /* This platform does not support acpi suspend/resume. */ 2269 return (EOPNOTSUPP); 2270 #endif 2271 2272 /* If no pending sleep state, return an error. */ 2273 ACPI_LOCK(acpi); 2274 sc = clone->acpi_sc; 2275 if (sc->acpi_next_sstate == 0) { 2276 ACPI_UNLOCK(acpi); 2277 return (ENXIO); 2278 } 2279 2280 /* Caller wants to abort suspend process. */ 2281 if (error) { 2282 sc->acpi_next_sstate = 0; 2283 callout_stop(&sc->susp_force_to); 2284 kprintf("acpi: listener on %s cancelled the pending suspend\n", 2285 devtoname(clone->cdev)); 2286 ACPI_UNLOCK(acpi); 2287 return (0); 2288 } 2289 2290 /* 2291 * Mark this device as acking the suspend request. Then, walk through 2292 * all devices, seeing if they agree yet. We only count devices that 2293 * are writable since read-only devices couldn't ack the request. 2294 */ 2295 clone->notify_status = APM_EV_ACKED; 2296 sleeping = TRUE; 2297 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2298 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2299 clone->notify_status != APM_EV_ACKED) { 2300 sleeping = FALSE; 2301 break; 2302 } 2303 } 2304 2305 /* If all devices have voted "yes", we will suspend now. */ 2306 if (sleeping) 2307 callout_stop(&sc->susp_force_to); 2308 ACPI_UNLOCK(acpi); 2309 ret = 0; 2310 if (sleeping) { 2311 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2312 ret = ENODEV; 2313 } 2314 2315 return (ret); 2316 } 2317 2318 static void 2319 acpi_sleep_enable(void *arg) 2320 { 2321 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2322 } 2323 2324 enum acpi_sleep_state { 2325 ACPI_SS_NONE, 2326 ACPI_SS_GPE_SET, 2327 ACPI_SS_DEV_SUSPEND, 2328 ACPI_SS_SLP_PREP, 2329 ACPI_SS_SLEPT, 2330 }; 2331 2332 /* 2333 * Enter the desired system sleep state. 2334 * 2335 * Currently we support S1-S5 but S4 is only S4BIOS 2336 */ 2337 static ACPI_STATUS 2338 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2339 { 2340 ACPI_STATUS status; 2341 UINT8 TypeA; 2342 UINT8 TypeB; 2343 enum acpi_sleep_state slp_state; 2344 2345 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2346 2347 /* Re-entry once we're suspending is not allowed. */ 2348 status = AE_OK; 2349 ACPI_LOCK(acpi); 2350 if (sc->acpi_sleep_disabled) { 2351 ACPI_UNLOCK(acpi); 2352 kprintf("acpi: suspend request ignored (not ready yet)\n"); 2353 return (AE_ERROR); 2354 } 2355 sc->acpi_sleep_disabled = 1; 2356 ACPI_UNLOCK(acpi); 2357 2358 /* 2359 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2360 * drivers need this. 2361 */ 2362 //get_mplock(); 2363 slp_state = ACPI_SS_NONE; 2364 switch (state) { 2365 case ACPI_STATE_S1: 2366 case ACPI_STATE_S2: 2367 case ACPI_STATE_S3: 2368 case ACPI_STATE_S4: 2369 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2370 if (status == AE_NOT_FOUND) { 2371 device_printf(sc->acpi_dev, 2372 "Sleep state S%d not supported by BIOS\n", state); 2373 break; 2374 } else if (ACPI_FAILURE(status)) { 2375 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2376 AcpiFormatException(status)); 2377 break; 2378 } 2379 2380 sc->acpi_sstate = state; 2381 2382 /* Enable any GPEs as appropriate and requested by the user. */ 2383 acpi_wake_prep_walk(state); 2384 slp_state = ACPI_SS_GPE_SET; 2385 2386 /* 2387 * Inform all devices that we are going to sleep. If at least one 2388 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2389 * 2390 * XXX Note that a better two-pass approach with a 'veto' pass 2391 * followed by a "real thing" pass would be better, but the current 2392 * bus interface does not provide for this. 2393 */ 2394 if (DEVICE_SUSPEND(root_bus) != 0) { 2395 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2396 break; 2397 } 2398 slp_state = ACPI_SS_DEV_SUSPEND; 2399 2400 /* If testing device suspend only, back out of everything here. */ 2401 if (acpi_susp_bounce) 2402 break; 2403 2404 status = AcpiEnterSleepStatePrep(state); 2405 if (ACPI_FAILURE(status)) { 2406 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2407 AcpiFormatException(status)); 2408 break; 2409 } 2410 slp_state = ACPI_SS_SLP_PREP; 2411 2412 if (sc->acpi_sleep_delay > 0) 2413 DELAY(sc->acpi_sleep_delay * 1000000); 2414 2415 if (state != ACPI_STATE_S1) { 2416 acpi_sleep_machdep(sc, state); 2417 2418 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2419 if (state == ACPI_STATE_S4) 2420 AcpiEnable(); 2421 } else { 2422 ACPI_DISABLE_IRQS(); 2423 status = AcpiEnterSleepState(state); 2424 if (ACPI_FAILURE(status)) { 2425 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2426 AcpiFormatException(status)); 2427 break; 2428 } 2429 } 2430 slp_state = ACPI_SS_SLEPT; 2431 break; 2432 case ACPI_STATE_S5: 2433 /* 2434 * Shut down cleanly and power off. This will call us back through the 2435 * shutdown handlers. 2436 */ 2437 shutdown_nice(RB_POWEROFF); 2438 break; 2439 case ACPI_STATE_S0: 2440 default: 2441 status = AE_BAD_PARAMETER; 2442 break; 2443 } 2444 2445 /* 2446 * Back out state according to how far along we got in the suspend 2447 * process. This handles both the error and success cases. 2448 */ 2449 sc->acpi_next_sstate = 0; 2450 if (slp_state >= ACPI_SS_GPE_SET) { 2451 acpi_wake_prep_walk(state); 2452 sc->acpi_sstate = ACPI_STATE_S0; 2453 } 2454 if (slp_state >= ACPI_SS_SLP_PREP) 2455 AcpiLeaveSleepState(state); 2456 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2457 DEVICE_RESUME(root_bus); 2458 if (slp_state >= ACPI_SS_SLEPT) 2459 acpi_enable_fixed_events(sc); 2460 2461 /* Allow another sleep request after a while. */ 2462 /* XXX: needs timeout */ 2463 if (state != ACPI_STATE_S5) 2464 acpi_sleep_enable(sc); 2465 2466 /* Run /etc/rc.resume after we are back. */ 2467 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2468 2469 //rel_mplock(); 2470 return_ACPI_STATUS (status); 2471 } 2472 2473 /* Enable or disable the device's GPE. */ 2474 int 2475 acpi_wake_set_enable(device_t dev, int enable) 2476 { 2477 struct acpi_prw_data prw; 2478 ACPI_STATUS status; 2479 int flags; 2480 2481 /* Make sure the device supports waking the system and get the GPE. */ 2482 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2483 return (ENXIO); 2484 2485 flags = acpi_get_flags(dev); 2486 if (enable) { 2487 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2488 ACPI_GPE_ENABLE); 2489 if (ACPI_FAILURE(status)) { 2490 device_printf(dev, "enable wake failed\n"); 2491 return (ENXIO); 2492 } 2493 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2494 } else { 2495 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2496 ACPI_GPE_DISABLE); 2497 if (ACPI_FAILURE(status)) { 2498 device_printf(dev, "disable wake failed\n"); 2499 return (ENXIO); 2500 } 2501 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2502 } 2503 2504 return (0); 2505 } 2506 2507 static int 2508 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2509 { 2510 struct acpi_prw_data prw; 2511 device_t dev; 2512 2513 /* Check that this is a wake-capable device and get its GPE. */ 2514 if (acpi_parse_prw(handle, &prw) != 0) 2515 return (ENXIO); 2516 dev = acpi_get_device(handle); 2517 2518 /* 2519 * The destination sleep state must be less than (i.e., higher power) 2520 * or equal to the value specified by _PRW. If this GPE cannot be 2521 * enabled for the next sleep state, then disable it. If it can and 2522 * the user requested it be enabled, turn on any required power resources 2523 * and set _PSW. 2524 */ 2525 if (sstate > prw.lowest_wake) { 2526 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2527 if (bootverbose) 2528 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2529 acpi_name(handle), sstate); 2530 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2531 acpi_pwr_wake_enable(handle, 1); 2532 acpi_SetInteger(handle, "_PSW", 1); 2533 if (bootverbose) 2534 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2535 acpi_name(handle), sstate); 2536 } 2537 2538 return (0); 2539 } 2540 2541 static int 2542 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2543 { 2544 struct acpi_prw_data prw; 2545 device_t dev; 2546 2547 /* 2548 * Check that this is a wake-capable device and get its GPE. Return 2549 * now if the user didn't enable this device for wake. 2550 */ 2551 if (acpi_parse_prw(handle, &prw) != 0) 2552 return (ENXIO); 2553 dev = acpi_get_device(handle); 2554 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2555 return (0); 2556 2557 /* 2558 * If this GPE couldn't be enabled for the previous sleep state, it was 2559 * disabled before going to sleep so re-enable it. If it was enabled, 2560 * clear _PSW and turn off any power resources it used. 2561 */ 2562 if (sstate > prw.lowest_wake) { 2563 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2564 if (bootverbose) 2565 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2566 } else { 2567 acpi_SetInteger(handle, "_PSW", 0); 2568 acpi_pwr_wake_enable(handle, 0); 2569 if (bootverbose) 2570 device_printf(dev, "run_prep cleaned up for %s\n", 2571 acpi_name(handle)); 2572 } 2573 2574 return (0); 2575 } 2576 2577 static ACPI_STATUS 2578 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2579 { 2580 int sstate; 2581 2582 /* If suspending, run the sleep prep function, otherwise wake. */ 2583 sstate = *(int *)context; 2584 if (AcpiGbl_SystemAwakeAndRunning) 2585 acpi_wake_sleep_prep(handle, sstate); 2586 else 2587 acpi_wake_run_prep(handle, sstate); 2588 return (AE_OK); 2589 } 2590 2591 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2592 static int 2593 acpi_wake_prep_walk(int sstate) 2594 { 2595 ACPI_HANDLE sb_handle; 2596 2597 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2598 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2599 acpi_wake_prep, NULL, &sstate, NULL); 2600 } 2601 return (0); 2602 } 2603 2604 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2605 static int 2606 acpi_wake_sysctl_walk(device_t dev) 2607 { 2608 #ifdef notyet 2609 int error, i, numdevs; 2610 device_t *devlist; 2611 device_t child; 2612 ACPI_STATUS status; 2613 2614 error = device_get_children(dev, &devlist, &numdevs); 2615 if (error != 0 || numdevs == 0) { 2616 if (numdevs == 0) 2617 kfree(devlist, M_TEMP); 2618 return (error); 2619 } 2620 for (i = 0; i < numdevs; i++) { 2621 child = devlist[i]; 2622 acpi_wake_sysctl_walk(child); 2623 if (!device_is_attached(child)) 2624 continue; 2625 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2626 if (ACPI_SUCCESS(status)) { 2627 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2628 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2629 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2630 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2631 } 2632 } 2633 kfree(devlist, M_TEMP); 2634 #endif 2635 2636 return (0); 2637 } 2638 2639 #ifdef notyet 2640 /* Enable or disable wake from userland. */ 2641 static int 2642 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2643 { 2644 int enable, error; 2645 device_t dev; 2646 2647 dev = (device_t)arg1; 2648 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2649 2650 error = sysctl_handle_int(oidp, &enable, 0, req); 2651 if (error != 0 || req->newptr == NULL) 2652 return (error); 2653 if (enable != 0 && enable != 1) 2654 return (EINVAL); 2655 2656 return (acpi_wake_set_enable(dev, enable)); 2657 } 2658 #endif 2659 2660 /* Parse a device's _PRW into a structure. */ 2661 int 2662 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2663 { 2664 ACPI_STATUS status; 2665 ACPI_BUFFER prw_buffer; 2666 ACPI_OBJECT *res, *res2; 2667 int error, i, power_count; 2668 2669 if (h == NULL || prw == NULL) 2670 return (EINVAL); 2671 2672 /* 2673 * The _PRW object (7.2.9) is only required for devices that have the 2674 * ability to wake the system from a sleeping state. 2675 */ 2676 error = EINVAL; 2677 prw_buffer.Pointer = NULL; 2678 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2679 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2680 if (ACPI_FAILURE(status)) 2681 return (ENOENT); 2682 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2683 if (res == NULL) 2684 return (ENOENT); 2685 if (!ACPI_PKG_VALID(res, 2)) 2686 goto out; 2687 2688 /* 2689 * Element 1 of the _PRW object: 2690 * The lowest power system sleeping state that can be entered while still 2691 * providing wake functionality. The sleeping state being entered must 2692 * be less than (i.e., higher power) or equal to this value. 2693 */ 2694 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2695 goto out; 2696 2697 /* 2698 * Element 0 of the _PRW object: 2699 */ 2700 switch (res->Package.Elements[0].Type) { 2701 case ACPI_TYPE_INTEGER: 2702 /* 2703 * If the data type of this package element is numeric, then this 2704 * _PRW package element is the bit index in the GPEx_EN, in the 2705 * GPE blocks described in the FADT, of the enable bit that is 2706 * enabled for the wake event. 2707 */ 2708 prw->gpe_handle = NULL; 2709 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2710 error = 0; 2711 break; 2712 case ACPI_TYPE_PACKAGE: 2713 /* 2714 * If the data type of this package element is a package, then this 2715 * _PRW package element is itself a package containing two 2716 * elements. The first is an object reference to the GPE Block 2717 * device that contains the GPE that will be triggered by the wake 2718 * event. The second element is numeric and it contains the bit 2719 * index in the GPEx_EN, in the GPE Block referenced by the 2720 * first element in the package, of the enable bit that is enabled for 2721 * the wake event. 2722 * 2723 * For example, if this field is a package then it is of the form: 2724 * Package() {\_SB.PCI0.ISA.GPE, 2} 2725 */ 2726 res2 = &res->Package.Elements[0]; 2727 if (!ACPI_PKG_VALID(res2, 2)) 2728 goto out; 2729 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2730 if (prw->gpe_handle == NULL) 2731 goto out; 2732 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2733 goto out; 2734 error = 0; 2735 break; 2736 default: 2737 goto out; 2738 } 2739 2740 /* Elements 2 to N of the _PRW object are power resources. */ 2741 power_count = res->Package.Count - 2; 2742 if (power_count > ACPI_PRW_MAX_POWERRES) { 2743 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2744 power_count = 0; 2745 } 2746 prw->power_res_count = power_count; 2747 for (i = 0; i < power_count; i++) 2748 prw->power_res[i] = res->Package.Elements[i]; 2749 2750 out: 2751 if (prw_buffer.Pointer != NULL) 2752 AcpiOsFree(prw_buffer.Pointer); 2753 return (error); 2754 } 2755 2756 /* 2757 * ACPI Event Handlers 2758 */ 2759 2760 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2761 2762 static void 2763 acpi_system_eventhandler_sleep(void *arg, int state) 2764 { 2765 int ret; 2766 2767 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2768 2769 /* Check if button action is disabled. */ 2770 if (state == ACPI_S_STATES_MAX + 1) 2771 return; 2772 2773 /* Request that the system prepare to enter the given suspend state. */ 2774 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2775 if (ret != 0) 2776 kprintf("acpi: request to enter state S%d failed (err %d)\n", 2777 state, ret); 2778 2779 return_VOID; 2780 } 2781 2782 static void 2783 acpi_system_eventhandler_wakeup(void *arg, int state) 2784 { 2785 2786 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2787 2788 /* Currently, nothing to do for wakeup. */ 2789 2790 return_VOID; 2791 } 2792 2793 /* 2794 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2795 */ 2796 UINT32 2797 acpi_event_power_button_sleep(void *context) 2798 { 2799 struct acpi_softc *sc = (struct acpi_softc *)context; 2800 2801 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2802 2803 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2804 2805 return_VALUE (ACPI_INTERRUPT_HANDLED); 2806 } 2807 2808 UINT32 2809 acpi_event_power_button_wake(void *context) 2810 { 2811 struct acpi_softc *sc = (struct acpi_softc *)context; 2812 2813 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2814 2815 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2816 2817 return_VALUE (ACPI_INTERRUPT_HANDLED); 2818 } 2819 2820 UINT32 2821 acpi_event_sleep_button_sleep(void *context) 2822 { 2823 struct acpi_softc *sc = (struct acpi_softc *)context; 2824 2825 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2826 2827 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2828 2829 return_VALUE (ACPI_INTERRUPT_HANDLED); 2830 } 2831 2832 UINT32 2833 acpi_event_sleep_button_wake(void *context) 2834 { 2835 struct acpi_softc *sc = (struct acpi_softc *)context; 2836 2837 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2838 2839 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2840 2841 return_VALUE (ACPI_INTERRUPT_HANDLED); 2842 } 2843 2844 /* 2845 * XXX This static buffer is suboptimal. There is no locking so only 2846 * use this for single-threaded callers. 2847 */ 2848 char * 2849 acpi_name(ACPI_HANDLE handle) 2850 { 2851 ACPI_BUFFER buf; 2852 static char data[256]; 2853 2854 buf.Length = sizeof(data); 2855 buf.Pointer = data; 2856 2857 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2858 return (data); 2859 return ("(unknown)"); 2860 } 2861 2862 /* 2863 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2864 * parts of the namespace. 2865 */ 2866 int 2867 acpi_avoid(ACPI_HANDLE handle) 2868 { 2869 char *cp, *env, *np; 2870 int len; 2871 2872 np = acpi_name(handle); 2873 if (*np == '\\') 2874 np++; 2875 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2876 return (0); 2877 2878 /* Scan the avoid list checking for a match */ 2879 cp = env; 2880 for (;;) { 2881 while (*cp != 0 && isspace(*cp)) 2882 cp++; 2883 if (*cp == 0) 2884 break; 2885 len = 0; 2886 while (cp[len] != 0 && !isspace(cp[len])) 2887 len++; 2888 if (!strncmp(cp, np, len)) { 2889 kfreeenv(env); 2890 return(1); 2891 } 2892 cp += len; 2893 } 2894 kfreeenv(env); 2895 2896 return (0); 2897 } 2898 2899 /* 2900 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2901 */ 2902 int 2903 acpi_disabled(char *subsys) 2904 { 2905 char *cp, *env; 2906 int len; 2907 2908 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 2909 return (0); 2910 if (strcmp(env, "all") == 0) { 2911 kfreeenv(env); 2912 return (1); 2913 } 2914 2915 /* Scan the disable list, checking for a match. */ 2916 cp = env; 2917 for (;;) { 2918 while (*cp != '\0' && isspace(*cp)) 2919 cp++; 2920 if (*cp == '\0') 2921 break; 2922 len = 0; 2923 while (cp[len] != '\0' && !isspace(cp[len])) 2924 len++; 2925 if (strncmp(cp, subsys, len) == 0) { 2926 kfreeenv(env); 2927 return (1); 2928 } 2929 cp += len; 2930 } 2931 kfreeenv(env); 2932 2933 return (0); 2934 } 2935 2936 /* 2937 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 2938 * components are enabled by default. The ones that are not have to be 2939 * enabled via debug.acpi.enabled. 2940 */ 2941 int 2942 acpi_enabled(char *subsys) 2943 { 2944 char *cp, *env; 2945 int len; 2946 2947 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 2948 return (0); 2949 if (strcmp(env, "all") == 0) { 2950 kfreeenv(env); 2951 return (1); 2952 } 2953 2954 /* Scan the enable list, checking for a match. */ 2955 cp = env; 2956 for (;;) { 2957 while (*cp != '\0' && isspace(*cp)) 2958 cp++; 2959 if (*cp == '\0') 2960 break; 2961 len = 0; 2962 while (cp[len] != '\0' && !isspace(cp[len])) 2963 len++; 2964 if (strncmp(cp, subsys, len) == 0) { 2965 kfreeenv(env); 2966 return (1); 2967 } 2968 cp += len; 2969 } 2970 kfreeenv(env); 2971 2972 return (0); 2973 } 2974 2975 /* 2976 * Control interface. 2977 * 2978 * We multiplex ioctls for all participating ACPI devices here. Individual 2979 * drivers wanting to be accessible via /dev/acpi should use the 2980 * register/deregister interface to make their handlers visible. 2981 */ 2982 struct acpi_ioctl_hook 2983 { 2984 TAILQ_ENTRY(acpi_ioctl_hook) link; 2985 u_long cmd; 2986 acpi_ioctl_fn fn; 2987 void *arg; 2988 }; 2989 2990 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2991 static int acpi_ioctl_hooks_initted; 2992 2993 int 2994 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2995 { 2996 struct acpi_ioctl_hook *hp; 2997 2998 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2999 return (ENOMEM); 3000 hp->cmd = cmd; 3001 hp->fn = fn; 3002 hp->arg = arg; 3003 3004 ACPI_LOCK(acpi); 3005 if (acpi_ioctl_hooks_initted == 0) { 3006 TAILQ_INIT(&acpi_ioctl_hooks); 3007 acpi_ioctl_hooks_initted = 1; 3008 } 3009 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3010 ACPI_UNLOCK(acpi); 3011 3012 return (0); 3013 } 3014 3015 void 3016 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3017 { 3018 struct acpi_ioctl_hook *hp; 3019 3020 ACPI_LOCK(acpi); 3021 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3022 if (hp->cmd == cmd && hp->fn == fn) 3023 break; 3024 3025 if (hp != NULL) { 3026 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3027 kfree(hp, M_ACPIDEV); 3028 } 3029 ACPI_UNLOCK(acpi); 3030 } 3031 3032 static int 3033 acpiopen(struct dev_open_args *ap) 3034 { 3035 return (0); 3036 } 3037 3038 static int 3039 acpiclose(struct dev_close_args *ap) 3040 { 3041 return (0); 3042 } 3043 3044 static int 3045 acpiioctl(struct dev_ioctl_args *ap) 3046 { 3047 struct acpi_softc *sc; 3048 struct acpi_ioctl_hook *hp; 3049 int error, state; 3050 3051 error = 0; 3052 hp = NULL; 3053 sc = ap->a_head.a_dev->si_drv1; 3054 3055 /* 3056 * Scan the list of registered ioctls, looking for handlers. 3057 */ 3058 ACPI_LOCK(acpi); 3059 if (acpi_ioctl_hooks_initted) 3060 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3061 if (hp->cmd == ap->a_cmd) 3062 break; 3063 } 3064 ACPI_UNLOCK(acpi); 3065 if (hp) 3066 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3067 3068 /* 3069 * Core ioctls are not permitted for non-writable user. 3070 * Currently, other ioctls just fetch information. 3071 * Not changing system behavior. 3072 */ 3073 if ((ap->a_fflag & FWRITE) == 0) 3074 return (EPERM); 3075 3076 /* Core system ioctls. */ 3077 switch (ap->a_cmd) { 3078 case ACPIIO_REQSLPSTATE: 3079 state = *(int *)ap->a_data; 3080 if (state != ACPI_STATE_S5) 3081 error = acpi_ReqSleepState(sc, state); 3082 else { 3083 kprintf("power off via acpi ioctl not supported\n"); 3084 error = ENXIO; 3085 } 3086 break; 3087 case ACPIIO_ACKSLPSTATE: 3088 error = EOPNOTSUPP; 3089 #if 0 /* notyet */ 3090 error = *(int *)ap->a_data; 3091 error = acpi_AckSleepState(sc->acpi_clone, error); 3092 #endif 3093 break; 3094 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3095 error = EINVAL; 3096 state = *(int *)ap->a_data; 3097 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3098 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3099 error = 0; 3100 break; 3101 default: 3102 error = ENXIO; 3103 break; 3104 } 3105 return (error); 3106 } 3107 3108 static int 3109 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3110 { 3111 int error; 3112 struct sbuf sb; 3113 UINT8 state, TypeA, TypeB; 3114 3115 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3116 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3117 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3118 sbuf_printf(&sb, "S%d ", state); 3119 sbuf_trim(&sb); 3120 sbuf_finish(&sb); 3121 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3122 sbuf_delete(&sb); 3123 return (error); 3124 } 3125 3126 static int 3127 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3128 { 3129 char sleep_state[10]; 3130 int error; 3131 u_int new_state, old_state; 3132 3133 old_state = *(u_int *)oidp->oid_arg1; 3134 if (old_state > ACPI_S_STATES_MAX + 1) 3135 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3136 else 3137 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3138 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3139 if (error == 0 && req->newptr != NULL) { 3140 new_state = ACPI_STATE_S0; 3141 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3142 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3143 break; 3144 if (new_state <= ACPI_S_STATES_MAX + 1) { 3145 if (new_state != old_state) 3146 *(u_int *)oidp->oid_arg1 = new_state; 3147 } else 3148 error = EINVAL; 3149 } 3150 3151 return (error); 3152 } 3153 3154 /* Inform devctl(4) when we receive a Notify. */ 3155 void 3156 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3157 { 3158 char notify_buf[16]; 3159 ACPI_BUFFER handle_buf; 3160 ACPI_STATUS status; 3161 3162 if (subsystem == NULL) 3163 return; 3164 3165 handle_buf.Pointer = NULL; 3166 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3167 status = AcpiNsHandleToPathname(h, &handle_buf); 3168 if (ACPI_FAILURE(status)) 3169 return; 3170 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3171 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3172 AcpiOsFree(handle_buf.Pointer); 3173 } 3174 3175 #ifdef ACPI_DEBUG 3176 /* 3177 * Support for parsing debug options from the kernel environment. 3178 * 3179 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3180 * by specifying the names of the bits in the debug.acpi.layer and 3181 * debug.acpi.level environment variables. Bits may be unset by 3182 * prefixing the bit name with !. 3183 */ 3184 struct debugtag 3185 { 3186 char *name; 3187 UINT32 value; 3188 }; 3189 3190 static struct debugtag dbg_layer[] = { 3191 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3192 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3193 {"ACPI_EVENTS", ACPI_EVENTS}, 3194 {"ACPI_TABLES", ACPI_TABLES}, 3195 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3196 {"ACPI_PARSER", ACPI_PARSER}, 3197 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3198 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3199 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3200 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3201 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3202 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3203 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3204 3205 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3206 {"ACPI_BATTERY", ACPI_BATTERY}, 3207 {"ACPI_BUS", ACPI_BUS}, 3208 {"ACPI_BUTTON", ACPI_BUTTON}, 3209 {"ACPI_EC", ACPI_EC}, 3210 {"ACPI_FAN", ACPI_FAN}, 3211 {"ACPI_POWERRES", ACPI_POWERRES}, 3212 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3213 {"ACPI_THERMAL", ACPI_THERMAL}, 3214 {"ACPI_TIMER", ACPI_TIMER}, 3215 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3216 {NULL, 0} 3217 }; 3218 3219 static struct debugtag dbg_level[] = { 3220 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3221 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3222 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3223 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3224 3225 /* Trace verbosity level 1 [Standard Trace Level] */ 3226 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3227 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3228 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3229 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3230 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3231 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3232 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3233 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3234 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3235 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3236 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3237 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3238 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3239 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3240 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3241 3242 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3243 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3244 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3245 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3246 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3247 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3248 3249 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3250 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3251 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3252 {"ACPI_LV_IO", ACPI_LV_IO}, 3253 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3254 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3255 3256 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3257 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3258 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3259 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3260 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3261 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3262 {NULL, 0} 3263 }; 3264 3265 static void 3266 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3267 { 3268 char *ep; 3269 int i, l; 3270 int set; 3271 3272 while (*cp) { 3273 if (isspace(*cp)) { 3274 cp++; 3275 continue; 3276 } 3277 ep = cp; 3278 while (*ep && !isspace(*ep)) 3279 ep++; 3280 if (*cp == '!') { 3281 set = 0; 3282 cp++; 3283 if (cp == ep) 3284 continue; 3285 } else { 3286 set = 1; 3287 } 3288 l = ep - cp; 3289 for (i = 0; tag[i].name != NULL; i++) { 3290 if (!strncmp(cp, tag[i].name, l)) { 3291 if (set) 3292 *flag |= tag[i].value; 3293 else 3294 *flag &= ~tag[i].value; 3295 } 3296 } 3297 cp = ep; 3298 } 3299 } 3300 3301 static void 3302 acpi_set_debugging(void *junk) 3303 { 3304 char *layer, *level; 3305 3306 if (cold) { 3307 AcpiDbgLayer = 0; 3308 AcpiDbgLevel = 0; 3309 } 3310 3311 layer = kgetenv("debug.acpi.layer"); 3312 level = kgetenv("debug.acpi.level"); 3313 if (layer == NULL && level == NULL) 3314 return; 3315 3316 kprintf("ACPI set debug"); 3317 if (layer != NULL) { 3318 if (strcmp("NONE", layer) != 0) 3319 kprintf(" layer '%s'", layer); 3320 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3321 kfreeenv(layer); 3322 } 3323 if (level != NULL) { 3324 if (strcmp("NONE", level) != 0) 3325 kprintf(" level '%s'", level); 3326 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3327 kfreeenv(level); 3328 } 3329 kprintf("\n"); 3330 } 3331 3332 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3333 NULL); 3334 3335 static int 3336 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3337 { 3338 int error, *dbg; 3339 struct debugtag *tag; 3340 struct sbuf sb; 3341 3342 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3343 return (ENOMEM); 3344 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3345 tag = &dbg_layer[0]; 3346 dbg = &AcpiDbgLayer; 3347 } else { 3348 tag = &dbg_level[0]; 3349 dbg = &AcpiDbgLevel; 3350 } 3351 3352 /* Get old values if this is a get request. */ 3353 ACPI_SERIAL_BEGIN(acpi); 3354 if (*dbg == 0) { 3355 sbuf_cpy(&sb, "NONE"); 3356 } else if (req->newptr == NULL) { 3357 for (; tag->name != NULL; tag++) { 3358 if ((*dbg & tag->value) == tag->value) 3359 sbuf_printf(&sb, "%s ", tag->name); 3360 } 3361 } 3362 sbuf_trim(&sb); 3363 sbuf_finish(&sb); 3364 3365 /* Copy out the old values to the user. */ 3366 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3367 sbuf_delete(&sb); 3368 3369 /* If the user is setting a string, parse it. */ 3370 if (error == 0 && req->newptr != NULL) { 3371 *dbg = 0; 3372 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3373 acpi_set_debugging(NULL); 3374 } 3375 ACPI_SERIAL_END(acpi); 3376 3377 return (error); 3378 } 3379 3380 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3381 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3382 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3383 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3384 #endif /* ACPI_DEBUG */ 3385 3386 static int 3387 acpi_pm_func(u_long cmd, void *arg, ...) 3388 { 3389 int state, acpi_state; 3390 int error; 3391 struct acpi_softc *sc; 3392 va_list ap; 3393 3394 error = 0; 3395 switch (cmd) { 3396 case POWER_CMD_SUSPEND: 3397 sc = (struct acpi_softc *)arg; 3398 if (sc == NULL) { 3399 error = EINVAL; 3400 goto out; 3401 } 3402 3403 va_start(ap, arg); 3404 state = va_arg(ap, int); 3405 va_end(ap); 3406 3407 switch (state) { 3408 case POWER_SLEEP_STATE_STANDBY: 3409 acpi_state = sc->acpi_standby_sx; 3410 break; 3411 case POWER_SLEEP_STATE_SUSPEND: 3412 acpi_state = sc->acpi_suspend_sx; 3413 break; 3414 case POWER_SLEEP_STATE_HIBERNATE: 3415 acpi_state = ACPI_STATE_S4; 3416 break; 3417 default: 3418 error = EINVAL; 3419 goto out; 3420 } 3421 3422 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3423 error = ENXIO; 3424 break; 3425 default: 3426 error = EINVAL; 3427 goto out; 3428 } 3429 3430 out: 3431 return (error); 3432 } 3433 3434 static void 3435 acpi_pm_register(void *arg) 3436 { 3437 if (!cold || resource_disabled("acpi", 0)) 3438 return; 3439 3440 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3441 } 3442 3443 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3444