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 92 /* Bitmap of device quirks. */ 93 int acpi_quirks; 94 95 static int acpi_modevent(struct module *mod, int event, void *junk); 96 static void acpi_identify(driver_t *driver, device_t parent); 97 static int acpi_probe(device_t dev); 98 static int acpi_attach(device_t dev); 99 static int acpi_suspend(device_t dev); 100 static int acpi_resume(device_t dev); 101 static int acpi_shutdown(device_t dev); 102 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 103 int unit); 104 static int acpi_print_child(device_t bus, device_t child); 105 static void acpi_probe_nomatch(device_t bus, device_t child); 106 static void acpi_driver_added(device_t dev, driver_t *driver); 107 static int acpi_read_ivar(device_t dev, device_t child, int index, 108 uintptr_t *result); 109 static int acpi_write_ivar(device_t dev, device_t child, int index, 110 uintptr_t value); 111 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 112 static int acpi_sysres_alloc(device_t dev); 113 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 114 int type, int *rid, u_long start, u_long end, 115 u_long count, u_int flags, int cpuid); 116 static int acpi_release_resource(device_t bus, device_t child, int type, 117 int rid, struct resource *r); 118 static void acpi_delete_resource(device_t bus, device_t child, int type, 119 int rid); 120 static uint32_t acpi_isa_get_logicalid(device_t dev); 121 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 122 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 123 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 124 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 125 ACPI_BUFFER *ret); 126 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 127 int *dstate); 128 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 129 void *context, void **retval); 130 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 131 int max_depth, acpi_scan_cb_t user_fn, void *arg); 132 static int acpi_set_powerstate_method(device_t bus, device_t child, 133 int state); 134 static int acpi_isa_pnp_probe(device_t bus, device_t child, 135 struct isa_pnp_id *ids); 136 static void acpi_probe_children(device_t bus); 137 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 138 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 139 void *context, void **status); 140 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 141 static void acpi_shutdown_final(void *arg, int howto); 142 static void acpi_enable_fixed_events(struct acpi_softc *sc); 143 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 144 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 145 static int acpi_wake_prep_walk(int sstate); 146 static int acpi_wake_sysctl_walk(device_t dev); 147 #ifdef notyet 148 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 149 #endif 150 static void acpi_system_eventhandler_sleep(void *arg, int state); 151 static void acpi_system_eventhandler_wakeup(void *arg, int state); 152 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 153 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 154 static int acpi_pm_func(u_long cmd, void *arg, ...); 155 static int acpi_child_location_str_method(device_t acdev, device_t child, 156 char *buf, size_t buflen); 157 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 158 char *buf, size_t buflen); 159 static void acpi_enable_pcie(void); 160 161 static device_method_t acpi_methods[] = { 162 /* Device interface */ 163 DEVMETHOD(device_identify, acpi_identify), 164 DEVMETHOD(device_probe, acpi_probe), 165 DEVMETHOD(device_attach, acpi_attach), 166 DEVMETHOD(device_shutdown, acpi_shutdown), 167 DEVMETHOD(device_detach, bus_generic_detach), 168 DEVMETHOD(device_suspend, acpi_suspend), 169 DEVMETHOD(device_resume, acpi_resume), 170 171 /* Bus interface */ 172 DEVMETHOD(bus_add_child, acpi_add_child), 173 DEVMETHOD(bus_print_child, acpi_print_child), 174 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 175 DEVMETHOD(bus_driver_added, acpi_driver_added), 176 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 177 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 178 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 179 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 180 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 181 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 182 DEVMETHOD(bus_release_resource, acpi_release_resource), 183 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 184 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 185 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 186 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 187 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 188 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 189 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 190 191 /* ACPI bus */ 192 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 193 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 194 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 195 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 196 197 /* PCI emulation */ 198 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 199 200 /* ISA emulation */ 201 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 202 203 DEVMETHOD_END 204 }; 205 206 static driver_t acpi_driver = { 207 "acpi", 208 acpi_methods, 209 sizeof(struct acpi_softc), 210 }; 211 212 static devclass_t acpi_devclass; 213 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 214 MODULE_VERSION(acpi, 1); 215 216 ACPI_SERIAL_DECL(acpi, "ACPI serializer") 217 218 /* Local pools for managing system resources for ACPI child devices. */ 219 static struct rman acpi_rman_io, acpi_rman_mem; 220 221 #define ACPI_MINIMUM_AWAKETIME 5 222 223 static const char* sleep_state_names[] = { 224 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 225 226 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 227 static char acpi_ca_version[12]; 228 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 229 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 230 231 /* 232 * Use this tunable to disable the control method auto-serialization 233 * mechanism that was added in 20140214 and superseded the previous 234 * AcpiGbl_SerializeAllMethods global. 235 */ 236 static int acpi_auto_serialize_methods = 1; 237 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 238 239 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 240 static int acpi_do_powerstate = 1; 241 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 242 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 243 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 244 245 /* Allow users to override quirks. */ 246 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 247 248 static int acpi_susp_bounce; 249 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 250 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 251 252 /* 253 * ACPI can only be loaded as a module by the loader; activating it after 254 * system bootstrap time is not useful, and can be fatal to the system. 255 * It also cannot be unloaded, since the entire system bus heirarchy hangs 256 * off it. 257 */ 258 static int 259 acpi_modevent(struct module *mod, int event, void *junk) 260 { 261 switch (event) { 262 case MOD_LOAD: 263 if (!cold) { 264 kprintf("The ACPI driver cannot be loaded after boot.\n"); 265 return (EPERM); 266 } 267 break; 268 case MOD_UNLOAD: 269 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 270 return (EBUSY); 271 break; 272 default: 273 break; 274 } 275 return (0); 276 } 277 278 /* 279 * Perform early initialization. 280 */ 281 ACPI_STATUS 282 acpi_Startup(void) 283 { 284 static int started = 0; 285 ACPI_STATUS status; 286 int val; 287 288 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 289 290 /* Only run the startup code once. The MADT driver also calls this. */ 291 if (started) 292 return_VALUE (AE_OK); 293 started = 1; 294 295 /* 296 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 297 * if more tables exist. 298 */ 299 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 300 kprintf("ACPI: Table initialisation failed: %s\n", 301 AcpiFormatException(status)); 302 return_VALUE (status); 303 } 304 305 /* Set up any quirks we have for this system. */ 306 if (acpi_quirks == ACPI_Q_OK) 307 acpi_table_quirks(&acpi_quirks); 308 309 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 310 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 311 acpi_quirks &= ~ACPI_Q_BROKEN; 312 if (acpi_quirks & ACPI_Q_BROKEN) { 313 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 314 status = AE_SUPPORT; 315 } 316 317 return_VALUE (status); 318 } 319 320 /* 321 * Detect ACPI, perform early initialisation 322 */ 323 static void 324 acpi_identify(driver_t *driver, device_t parent) 325 { 326 device_t child; 327 328 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 329 330 if (!cold) 331 return_VOID; 332 333 /* Check that we haven't been disabled with a hint. */ 334 if (resource_disabled("acpi", 0)) 335 return_VOID; 336 337 /* Make sure we're not being doubly invoked. */ 338 if (device_find_child(parent, "acpi", 0) != NULL) 339 return_VOID; 340 341 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 342 343 /* Initialize root tables. */ 344 if (ACPI_FAILURE(acpi_Startup())) { 345 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 346 return_VOID; 347 } 348 349 /* Attach the actual ACPI device. */ 350 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 351 device_printf(parent, "device_identify failed\n"); 352 return_VOID; 353 } 354 } 355 356 /* 357 * Fetch some descriptive data from ACPI to put in our attach message. 358 */ 359 static int 360 acpi_probe(device_t dev) 361 { 362 ACPI_TABLE_RSDP *rsdp; 363 ACPI_TABLE_HEADER *rsdt; 364 ACPI_PHYSICAL_ADDRESS paddr; 365 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 366 struct sbuf sb; 367 368 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 369 370 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 371 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 372 device_printf(dev, "probe failed, other PM system enabled.\n"); 373 return_VALUE (ENXIO); 374 } 375 376 if ((paddr = AcpiOsGetRootPointer()) == 0 || 377 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 378 return_VALUE (ENXIO); 379 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 380 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 381 else 382 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 383 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 384 385 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 386 return_VALUE (ENXIO); 387 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 388 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 389 sbuf_trim(&sb); 390 sbuf_putc(&sb, ' '); 391 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 392 sbuf_trim(&sb); 393 sbuf_finish(&sb); 394 device_set_desc_copy(dev, sbuf_data(&sb)); 395 sbuf_delete(&sb); 396 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 397 398 return_VALUE (0); 399 } 400 401 static int 402 acpi_attach(device_t dev) 403 { 404 struct acpi_softc *sc; 405 ACPI_STATUS status; 406 int error, state; 407 UINT32 flags; 408 UINT8 TypeA, TypeB; 409 char *env; 410 411 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 412 413 sc = device_get_softc(dev); 414 sc->acpi_dev = dev; 415 callout_init(&sc->susp_force_to); 416 417 if ((error = acpi_task_thread_init())) { 418 device_printf(dev, "Could not start task thread.\n"); 419 goto out; 420 } 421 422 error = ENXIO; 423 424 /* Initialize resource manager. */ 425 acpi_rman_io.rm_type = RMAN_ARRAY; 426 acpi_rman_io.rm_start = 0; 427 acpi_rman_io.rm_end = 0xffff; 428 acpi_rman_io.rm_descr = "ACPI I/O ports"; 429 if (rman_init(&acpi_rman_io, -1) != 0) 430 panic("acpi rman_init IO ports failed"); 431 acpi_rman_mem.rm_type = RMAN_ARRAY; 432 acpi_rman_mem.rm_start = 0; 433 acpi_rman_mem.rm_end = ~0ul; 434 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 435 if (rman_init(&acpi_rman_mem, -1) != 0) 436 panic("acpi rman_init memory failed"); 437 438 /* Initialise the ACPI mutex */ 439 ACPI_LOCK_INIT(acpi, "acpi"); 440 ACPI_SERIAL_INIT(acpi); 441 442 /* 443 * Set the globals from our tunables. This is needed because ACPI-CA 444 * uses UINT8 for some values and we have no tunable_byte. 445 */ 446 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods; 447 AcpiGbl_EnableInterpreterSlack = TRUE; 448 449 /* Start up the ACPI CA subsystem. */ 450 status = AcpiInitializeSubsystem(); 451 if (ACPI_FAILURE(status)) { 452 device_printf(dev, "Could not initialize Subsystem: %s\n", 453 AcpiFormatException(status)); 454 goto out; 455 } 456 457 /* Load ACPI name space. */ 458 status = AcpiLoadTables(); 459 if (ACPI_FAILURE(status)) { 460 device_printf(dev, "Could not load Namespace: %s\n", 461 AcpiFormatException(status)); 462 goto out; 463 } 464 465 /* Handle MCFG table if present. */ 466 acpi_enable_pcie(); 467 468 /* Install the default address space handlers. */ 469 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 470 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 471 if (ACPI_FAILURE(status)) { 472 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 473 AcpiFormatException(status)); 474 goto out; 475 } 476 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 477 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 478 if (ACPI_FAILURE(status)) { 479 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 480 AcpiFormatException(status)); 481 goto out; 482 } 483 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 484 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 485 if (ACPI_FAILURE(status)) { 486 device_printf(dev, "could not initialise PciConfig handler: %s\n", 487 AcpiFormatException(status)); 488 goto out; 489 } 490 491 /* 492 * Note that some systems (specifically, those with namespace evaluation 493 * issues that require the avoidance of parts of the namespace) must 494 * avoid running _INI and _STA on everything, as well as dodging the final 495 * object init pass. 496 * 497 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 498 * 499 * XXX We should arrange for the object init pass after we have attached 500 * all our child devices, but on many systems it works here. 501 */ 502 flags = 0; 503 if (ktestenv("debug.acpi.avoid")) 504 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 505 506 /* Bring the hardware and basic handlers online. */ 507 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 508 device_printf(dev, "Could not enable ACPI: %s\n", 509 AcpiFormatException(status)); 510 goto out; 511 } 512 513 /* 514 * Fix up the interrupt timer after enabling ACPI, so that the 515 * interrupt cputimer that choked by ACPI power management could 516 * be resurrected before probing various devices. 517 */ 518 DELAY(5000); 519 cputimer_intr_pmfixup(); 520 521 /* 522 * Call the ECDT probe function to provide EC functionality before 523 * the namespace has been evaluated. 524 * 525 * XXX This happens before the sysresource devices have been probed and 526 * attached so its resources come from nexus0. In practice, this isn't 527 * a problem but should be addressed eventually. 528 */ 529 acpi_ec_ecdt_probe(dev); 530 531 /* Bring device objects and regions online. */ 532 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 533 device_printf(dev, "Could not initialize ACPI objects: %s\n", 534 AcpiFormatException(status)); 535 goto out; 536 } 537 538 /* 539 * Setup our sysctl tree. 540 * 541 * XXX: This doesn't check to make sure that none of these fail. 542 */ 543 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 544 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 545 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 546 device_get_name(dev), CTLFLAG_RD, 0, ""); 547 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 548 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 549 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 550 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 552 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 553 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 555 &sc->acpi_sleep_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, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 558 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 559 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 560 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 561 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 562 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 563 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 564 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 565 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 566 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 567 "sleep delay"); 568 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 569 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 570 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 571 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 572 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 573 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 574 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 575 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 576 OID_AUTO, "handle_reboot", CTLFLAG_RW, 577 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 578 579 /* 580 * Default to 1 second before sleeping to give some machines time to 581 * stabilize. 582 */ 583 sc->acpi_sleep_delay = 1; 584 if (bootverbose) 585 sc->acpi_verbose = 1; 586 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 587 if (strcmp(env, "0") != 0) 588 sc->acpi_verbose = 1; 589 kfreeenv(env); 590 } 591 592 /* Only enable reboot by default if the FADT says it is available. */ 593 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 594 sc->acpi_handle_reboot = 1; 595 596 /* Only enable S4BIOS by default if the FACS says it is available. */ 597 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 598 sc->acpi_s4bios = 1; 599 600 /* 601 * Dispatch the default sleep state to devices. The lid switch is set 602 * to NONE by default to avoid surprising users. 603 */ 604 sc->acpi_power_button_sx = ACPI_STATE_S5; 605 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 606 sc->acpi_standby_sx = ACPI_STATE_S1; 607 sc->acpi_suspend_sx = ACPI_STATE_S3; 608 609 /* Pick the first valid sleep state for the sleep button default. */ 610 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 611 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 612 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 613 sc->acpi_sleep_button_sx = state; 614 break; 615 } 616 617 acpi_enable_fixed_events(sc); 618 619 /* 620 * Scan the namespace and attach/initialise children. 621 */ 622 623 /* Register our shutdown handler. */ 624 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 625 SHUTDOWN_PRI_LAST); 626 627 /* 628 * Register our acpi event handlers. 629 * XXX should be configurable eg. via userland policy manager. 630 */ 631 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 632 sc, ACPI_EVENT_PRI_LAST); 633 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 634 sc, ACPI_EVENT_PRI_LAST); 635 636 /* Flag our initial states. */ 637 sc->acpi_enabled = 1; 638 sc->acpi_sstate = ACPI_STATE_S0; 639 sc->acpi_sleep_disabled = 0; 640 /* Create the control device */ 641 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, 642 "acpi"); 643 sc->acpi_dev_t->si_drv1 = sc; 644 645 if ((error = acpi_machdep_init(dev))) 646 goto out; 647 648 /* Register ACPI again to pass the correct argument of pm_func. */ 649 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 650 651 if (!acpi_disabled("bus")) 652 acpi_probe_children(dev); 653 654 /* Update all GPEs and enable runtime GPEs. */ 655 status = AcpiUpdateAllGpes(); 656 if (ACPI_FAILURE(status)) { 657 device_printf(dev, "Could not update all GPEs: %s\n", 658 AcpiFormatException(status)); 659 } 660 661 /* Allow sleep request after a while. */ 662 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 663 664 error = 0; 665 666 out: 667 cputimer_intr_pmfixup(); 668 acpi_task_thread_schedule(); 669 return_VALUE (error); 670 } 671 672 static int 673 acpi_suspend(device_t dev) 674 { 675 device_t child, *devlist; 676 int error, i, numdevs, pstate; 677 678 GIANT_REQUIRED; 679 680 /* First give child devices a chance to suspend. */ 681 error = bus_generic_suspend(dev); 682 if (error) 683 return (error); 684 685 /* 686 * Now, set them into the appropriate power state, usually D3. If the 687 * device has an _SxD method for the next sleep state, use that power 688 * state instead. 689 */ 690 device_get_children(dev, &devlist, &numdevs); 691 for (i = 0; i < numdevs; i++) { 692 /* If the device is not attached, we've powered it down elsewhere. */ 693 child = devlist[i]; 694 if (!device_is_attached(child)) 695 continue; 696 697 /* 698 * Default to D3 for all sleep states. The _SxD method is optional 699 * so set the powerstate even if it's absent. 700 */ 701 pstate = PCI_POWERSTATE_D3; 702 error = acpi_device_pwr_for_sleep(device_get_parent(child), 703 child, &pstate); 704 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 705 pci_set_powerstate(child, pstate); 706 } 707 kfree(devlist, M_TEMP); 708 error = 0; 709 710 return (error); 711 } 712 713 static int 714 acpi_resume(device_t dev) 715 { 716 ACPI_HANDLE handle; 717 int i, numdevs; 718 device_t child, *devlist; 719 720 GIANT_REQUIRED; 721 722 /* 723 * Put all devices in D0 before resuming them. Call _S0D on each one 724 * since some systems expect this. 725 */ 726 device_get_children(dev, &devlist, &numdevs); 727 for (i = 0; i < numdevs; i++) { 728 child = devlist[i]; 729 handle = acpi_get_handle(child); 730 if (handle) 731 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 732 if (device_is_attached(child) && acpi_do_powerstate) 733 pci_set_powerstate(child, PCI_POWERSTATE_D0); 734 } 735 kfree(devlist, M_TEMP); 736 737 return (bus_generic_resume(dev)); 738 } 739 740 static int 741 acpi_shutdown(device_t dev) 742 { 743 744 GIANT_REQUIRED; 745 746 /* Allow children to shutdown first. */ 747 bus_generic_shutdown(dev); 748 749 /* 750 * Enable any GPEs that are able to power-on the system (i.e., RTC). 751 * Also, disable any that are not valid for this state (most). 752 */ 753 acpi_wake_prep_walk(ACPI_STATE_S5); 754 755 return (0); 756 } 757 758 /* 759 * Handle a new device being added 760 */ 761 static device_t 762 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 763 { 764 struct acpi_device *ad; 765 device_t child; 766 767 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 768 return (NULL); 769 770 resource_list_init(&ad->ad_rl); 771 child = device_add_child_ordered(parent, order, name, unit); 772 if (child != NULL) 773 device_set_ivars(child, ad); 774 else 775 kfree(ad, M_ACPIDEV); 776 return (child); 777 } 778 779 static int 780 acpi_print_child(device_t bus, device_t child) 781 { 782 struct acpi_device *adev = device_get_ivars(child); 783 struct resource_list *rl = &adev->ad_rl; 784 int retval = 0; 785 786 retval += bus_print_child_header(bus, child); 787 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 788 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 789 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 790 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 791 if (device_get_flags(child)) 792 retval += kprintf(" flags %#x", device_get_flags(child)); 793 retval += bus_print_child_footer(bus, child); 794 795 return (retval); 796 } 797 798 /* 799 * If this device is an ACPI child but no one claimed it, attempt 800 * to power it off. We'll power it back up when a driver is added. 801 * 802 * XXX Disabled for now since many necessary devices (like fdc and 803 * ATA) don't claim the devices we created for them but still expect 804 * them to be powered up. 805 */ 806 static void 807 acpi_probe_nomatch(device_t bus, device_t child) 808 { 809 810 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 811 } 812 813 /* 814 * If a new driver has a chance to probe a child, first power it up. 815 * 816 * XXX Disabled for now (see acpi_probe_nomatch for details). 817 */ 818 static void 819 acpi_driver_added(device_t dev, driver_t *driver) 820 { 821 device_t child, *devlist; 822 int i, numdevs; 823 824 DEVICE_IDENTIFY(driver, dev); 825 device_get_children(dev, &devlist, &numdevs); 826 for (i = 0; i < numdevs; i++) { 827 child = devlist[i]; 828 if (device_get_state(child) == DS_NOTPRESENT) { 829 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 830 if (device_probe_and_attach(child) != 0) 831 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 832 } 833 } 834 kfree(devlist, M_TEMP); 835 } 836 837 /* Location hint for devctl(8) */ 838 static int 839 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 840 size_t buflen) 841 { 842 struct acpi_device *dinfo = device_get_ivars(child); 843 844 if (dinfo->ad_handle) 845 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 846 else 847 ksnprintf(buf, buflen, "unknown"); 848 return (0); 849 } 850 851 /* PnP information for devctl(8) */ 852 static int 853 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 854 size_t buflen) 855 { 856 ACPI_DEVICE_INFO *adinfo; 857 struct acpi_device *dinfo = device_get_ivars(child); 858 char *end; 859 int error; 860 861 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo); 862 if (error) { 863 ksnprintf(buf, buflen, "unknown"); 864 } else { 865 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 866 (adinfo->Valid & ACPI_VALID_HID) ? 867 adinfo->HardwareId.String : "none", 868 (adinfo->Valid & ACPI_VALID_UID) ? 869 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 870 if (adinfo) 871 AcpiOsFree(adinfo); 872 } 873 return (0); 874 } 875 876 /* 877 * Handle per-device ivars 878 */ 879 static int 880 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 881 { 882 struct acpi_device *ad; 883 884 if ((ad = device_get_ivars(child)) == NULL) { 885 kprintf("device has no ivars\n"); 886 return (ENOENT); 887 } 888 889 /* ACPI and ISA compatibility ivars */ 890 switch(index) { 891 case ACPI_IVAR_HANDLE: 892 *(ACPI_HANDLE *)result = ad->ad_handle; 893 break; 894 case ACPI_IVAR_MAGIC: 895 *result = ad->ad_magic; 896 break; 897 case ACPI_IVAR_PRIVATE: 898 *(void **)result = ad->ad_private; 899 break; 900 case ACPI_IVAR_FLAGS: 901 *(int *)result = ad->ad_flags; 902 break; 903 case ISA_IVAR_VENDORID: 904 case ISA_IVAR_SERIAL: 905 case ISA_IVAR_COMPATID: 906 *(int *)result = -1; 907 break; 908 case ISA_IVAR_LOGICALID: 909 *(int *)result = acpi_isa_get_logicalid(child); 910 break; 911 default: 912 return (ENOENT); 913 } 914 915 return (0); 916 } 917 918 static int 919 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 920 { 921 struct acpi_device *ad; 922 923 if ((ad = device_get_ivars(child)) == NULL) { 924 kprintf("device has no ivars\n"); 925 return (ENOENT); 926 } 927 928 switch(index) { 929 case ACPI_IVAR_HANDLE: 930 ad->ad_handle = (ACPI_HANDLE)value; 931 break; 932 case ACPI_IVAR_MAGIC: 933 ad->ad_magic = value; 934 break; 935 case ACPI_IVAR_PRIVATE: 936 ad->ad_private = (void *)value; 937 break; 938 case ACPI_IVAR_FLAGS: 939 ad->ad_flags = (int)value; 940 break; 941 default: 942 panic("bad ivar write request (%d)", index); 943 return (ENOENT); 944 } 945 946 return (0); 947 } 948 949 /* 950 * Handle child resource allocation/removal 951 */ 952 static struct resource_list * 953 acpi_get_rlist(device_t dev, device_t child) 954 { 955 struct acpi_device *ad; 956 957 ad = device_get_ivars(child); 958 return (&ad->ad_rl); 959 } 960 961 /* 962 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 963 * duplicates, we merge any in the sysresource attach routine. 964 */ 965 static int 966 acpi_sysres_alloc(device_t dev) 967 { 968 struct resource *res; 969 struct resource_list *rl; 970 struct resource_list_entry *rle; 971 struct rman *rm; 972 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 973 device_t *children; 974 int child_count, i; 975 /* 976 * Probe/attach any sysresource devices. This would be unnecessary if we 977 * had multi-pass probe/attach. 978 */ 979 if (device_get_children(dev, &children, &child_count) != 0) 980 return (ENXIO); 981 for (i = 0; i < child_count; i++) { 982 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 983 device_probe_and_attach(children[i]); 984 } 985 kfree(children, M_TEMP); 986 987 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 988 if(!rl) 989 return 0; 990 SLIST_FOREACH(rle, rl, link) { 991 if (rle->res != NULL) { 992 device_printf(dev, "duplicate resource for %lx\n", rle->start); 993 continue; 994 } 995 996 /* Only memory and IO resources are valid here. */ 997 switch (rle->type) { 998 case SYS_RES_IOPORT: 999 rm = &acpi_rman_io; 1000 break; 1001 case SYS_RES_MEMORY: 1002 rm = &acpi_rman_mem; 1003 break; 1004 default: 1005 continue; 1006 } 1007 1008 /* Pre-allocate resource and add to our rman pool. */ 1009 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1010 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1011 0, -1); 1012 if (res != NULL) { 1013 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1014 rle->res = res; 1015 } else 1016 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1017 rle->start, rle->count, rle->type); 1018 } 1019 return (0); 1020 } 1021 1022 static struct resource * 1023 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1024 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1025 { 1026 ACPI_RESOURCE ares; 1027 struct acpi_device *ad = device_get_ivars(child); 1028 struct resource_list *rl = &ad->ad_rl; 1029 struct resource_list_entry *rle; 1030 struct resource *res; 1031 struct rman *rm; 1032 1033 res = NULL; 1034 1035 /* We only handle memory and IO resources through rman. */ 1036 switch (type) { 1037 case SYS_RES_IOPORT: 1038 rm = &acpi_rman_io; 1039 break; 1040 case SYS_RES_MEMORY: 1041 rm = &acpi_rman_mem; 1042 break; 1043 default: 1044 rm = NULL; 1045 } 1046 1047 ACPI_SERIAL_BEGIN(acpi); 1048 1049 /* 1050 * If this is an allocation of the "default" range for a given RID, and 1051 * we know what the resources for this device are (i.e., they're on the 1052 * child's resource list), use those start/end values. 1053 */ 1054 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1055 rle = resource_list_find(rl, type, *rid); 1056 if (rle == NULL) 1057 goto out; 1058 start = rle->start; 1059 end = rle->end; 1060 count = rle->count; 1061 cpuid = rle->cpuid; 1062 } 1063 1064 /* 1065 * If this is an allocation of a specific range, see if we can satisfy 1066 * the request from our system resource regions. If we can't, pass the 1067 * request up to the parent. 1068 */ 1069 if (start + count - 1 == end && rm != NULL) 1070 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1071 child); 1072 if (res == NULL) { 1073 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1074 start, end, count, flags, cpuid); 1075 } else { 1076 rman_set_rid(res, *rid); 1077 1078 /* If requested, activate the resource using the parent's method. */ 1079 if (flags & RF_ACTIVE) 1080 if (bus_activate_resource(child, type, *rid, res) != 0) { 1081 rman_release_resource(res); 1082 res = NULL; 1083 goto out; 1084 } 1085 } 1086 1087 if (res != NULL && device_get_parent(child) == bus) 1088 switch (type) { 1089 case SYS_RES_IRQ: 1090 /* 1091 * Since bus_config_intr() takes immediate effect, we cannot 1092 * configure the interrupt associated with a device when we 1093 * parse the resources but have to defer it until a driver 1094 * actually allocates the interrupt via bus_alloc_resource(). 1095 * 1096 * XXX: Should we handle the lookup failing? 1097 */ 1098 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1099 acpi_config_intr(child, &ares); 1100 else 1101 kprintf("irq resource not found\n"); 1102 break; 1103 } 1104 1105 out: 1106 ACPI_SERIAL_END(acpi); 1107 return (res); 1108 } 1109 1110 static int 1111 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1112 struct resource *r) 1113 { 1114 struct rman *rm; 1115 int ret; 1116 1117 /* We only handle memory and IO resources through rman. */ 1118 switch (type) { 1119 case SYS_RES_IOPORT: 1120 rm = &acpi_rman_io; 1121 break; 1122 case SYS_RES_MEMORY: 1123 rm = &acpi_rman_mem; 1124 break; 1125 default: 1126 rm = NULL; 1127 } 1128 1129 ACPI_SERIAL_BEGIN(acpi); 1130 1131 /* 1132 * If this resource belongs to one of our internal managers, 1133 * deactivate it and release it to the local pool. If it doesn't, 1134 * pass this request up to the parent. 1135 */ 1136 if (rm != NULL && rman_is_region_manager(r, rm)) { 1137 if (rman_get_flags(r) & RF_ACTIVE) { 1138 ret = bus_deactivate_resource(child, type, rid, r); 1139 if (ret != 0) 1140 goto out; 1141 } 1142 ret = rman_release_resource(r); 1143 } else 1144 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1145 1146 out: 1147 ACPI_SERIAL_END(acpi); 1148 return (ret); 1149 } 1150 1151 static void 1152 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1153 { 1154 struct resource_list *rl; 1155 1156 rl = acpi_get_rlist(bus, child); 1157 resource_list_delete(rl, type, rid); 1158 } 1159 1160 /* Allocate an IO port or memory resource, given its GAS. */ 1161 int 1162 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1163 struct resource **res, u_int flags) 1164 { 1165 int error, res_type; 1166 1167 error = ENOMEM; 1168 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1169 return (EINVAL); 1170 1171 /* We only support memory and IO spaces. */ 1172 switch (gas->SpaceId) { 1173 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1174 res_type = SYS_RES_MEMORY; 1175 break; 1176 case ACPI_ADR_SPACE_SYSTEM_IO: 1177 res_type = SYS_RES_IOPORT; 1178 break; 1179 default: 1180 return (EOPNOTSUPP); 1181 } 1182 1183 /* 1184 * If the register width is less than 8, assume the BIOS author means 1185 * it is a bit field and just allocate a byte. 1186 */ 1187 if (gas->BitWidth && gas->BitWidth < 8) 1188 gas->BitWidth = 8; 1189 1190 /* Validate the address after we're sure we support the space. */ 1191 if (gas->Address == 0 || gas->BitWidth == 0) 1192 return (EINVAL); 1193 1194 bus_set_resource(dev, res_type, *rid, gas->Address, 1195 gas->BitWidth / 8, -1); 1196 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1197 if (*res != NULL) { 1198 *type = res_type; 1199 error = 0; 1200 } else 1201 bus_delete_resource(dev, res_type, *rid); 1202 1203 return (error); 1204 } 1205 1206 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1207 static uint32_t 1208 acpi_isa_get_logicalid(device_t dev) 1209 { 1210 ACPI_DEVICE_INFO *devinfo; 1211 ACPI_HANDLE h; 1212 ACPI_STATUS error; 1213 u_int32_t pnpid; 1214 1215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1216 1217 devinfo = NULL; 1218 pnpid = 0; 1219 1220 /* Fetch and validate the HID. */ 1221 if ((h = acpi_get_handle(dev)) == NULL) 1222 goto out; 1223 error = AcpiGetObjectInfo(h, &devinfo); 1224 if (ACPI_FAILURE(error)) 1225 goto out; 1226 1227 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1228 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1229 1230 out: 1231 if (devinfo) 1232 AcpiOsFree(devinfo); 1233 return_VALUE (pnpid); 1234 } 1235 1236 static int 1237 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1238 { 1239 ACPI_DEVICE_INFO *devinfo; 1240 ACPI_HANDLE h; 1241 ACPI_STATUS error; 1242 uint32_t *pnpid; 1243 int valid, i; 1244 1245 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1246 1247 devinfo = NULL; 1248 pnpid = cids; 1249 valid = 0; 1250 1251 /* Fetch and validate the CID */ 1252 if ((h = acpi_get_handle(dev)) == NULL) 1253 goto out; 1254 error = AcpiGetObjectInfo(h, &devinfo); 1255 if (ACPI_FAILURE(error)) 1256 goto out; 1257 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1258 goto out; 1259 1260 if (devinfo->CompatibleIdList.Count < count) 1261 count = devinfo->CompatibleIdList.Count; 1262 for (i = 0; i < count; i++) { 1263 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1264 continue; 1265 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1266 valid++; 1267 } 1268 1269 out: 1270 if (devinfo) 1271 AcpiOsFree(devinfo); 1272 return_VALUE (valid); 1273 } 1274 1275 static char * 1276 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1277 { 1278 ACPI_HANDLE h; 1279 int i; 1280 1281 h = acpi_get_handle(dev); 1282 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1283 return (NULL); 1284 1285 /* Try to match one of the array of IDs with a HID or CID. */ 1286 for (i = 0; ids[i] != NULL; i++) { 1287 if (acpi_MatchHid(h, ids[i])) 1288 return (ids[i]); 1289 } 1290 return (NULL); 1291 } 1292 1293 static ACPI_STATUS 1294 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1295 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1296 { 1297 ACPI_HANDLE h; 1298 1299 if (dev == NULL) 1300 h = ACPI_ROOT_OBJECT; 1301 else if ((h = acpi_get_handle(dev)) == NULL) 1302 return (AE_BAD_PARAMETER); 1303 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1304 } 1305 1306 static int 1307 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1308 { 1309 struct acpi_softc *sc; 1310 ACPI_HANDLE handle; 1311 ACPI_STATUS status; 1312 char sxd[8]; 1313 int error; 1314 1315 sc = device_get_softc(bus); 1316 handle = acpi_get_handle(dev); 1317 1318 /* 1319 * XXX If we find these devices, don't try to power them down. 1320 * The serial and IRDA ports on my T23 hang the system when 1321 * set to D3 and it appears that such legacy devices may 1322 * need special handling in their drivers. 1323 */ 1324 if (handle == NULL || 1325 acpi_MatchHid(handle, "PNP0500") || 1326 acpi_MatchHid(handle, "PNP0501") || 1327 acpi_MatchHid(handle, "PNP0502") || 1328 acpi_MatchHid(handle, "PNP0510") || 1329 acpi_MatchHid(handle, "PNP0511")) 1330 return (ENXIO); 1331 1332 /* 1333 * Override next state with the value from _SxD, if present. If no 1334 * dstate argument was provided, don't fetch the return value. 1335 */ 1336 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1337 if (dstate) 1338 status = acpi_GetInteger(handle, sxd, dstate); 1339 else 1340 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1341 1342 switch (status) { 1343 case AE_OK: 1344 error = 0; 1345 break; 1346 case AE_NOT_FOUND: 1347 error = ESRCH; 1348 break; 1349 default: 1350 error = ENXIO; 1351 break; 1352 } 1353 1354 return (error); 1355 } 1356 1357 /* Callback arg for our implementation of walking the namespace. */ 1358 struct acpi_device_scan_ctx { 1359 acpi_scan_cb_t user_fn; 1360 void *arg; 1361 ACPI_HANDLE parent; 1362 }; 1363 1364 static ACPI_STATUS 1365 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1366 { 1367 struct acpi_device_scan_ctx *ctx; 1368 device_t dev, old_dev; 1369 ACPI_STATUS status; 1370 ACPI_OBJECT_TYPE type; 1371 1372 /* 1373 * Skip this device if we think we'll have trouble with it or it is 1374 * the parent where the scan began. 1375 */ 1376 ctx = (struct acpi_device_scan_ctx *)arg; 1377 if (acpi_avoid(h) || h == ctx->parent) 1378 return (AE_OK); 1379 1380 /* If this is not a valid device type (e.g., a method), skip it. */ 1381 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1382 return (AE_OK); 1383 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1384 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1385 return (AE_OK); 1386 1387 /* 1388 * Call the user function with the current device. If it is unchanged 1389 * afterwards, return. Otherwise, we update the handle to the new dev. 1390 */ 1391 old_dev = acpi_get_device(h); 1392 dev = old_dev; 1393 status = ctx->user_fn(h, &dev, level, ctx->arg); 1394 if (ACPI_FAILURE(status) || old_dev == dev) 1395 return (status); 1396 1397 /* Remove the old child and its connection to the handle. */ 1398 if (old_dev != NULL) { 1399 device_delete_child(device_get_parent(old_dev), old_dev); 1400 AcpiDetachData(h, acpi_fake_objhandler); 1401 } 1402 1403 /* Recreate the handle association if the user created a device. */ 1404 if (dev != NULL) 1405 AcpiAttachData(h, acpi_fake_objhandler, dev); 1406 1407 return (AE_OK); 1408 } 1409 1410 static ACPI_STATUS 1411 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1412 acpi_scan_cb_t user_fn, void *arg) 1413 { 1414 ACPI_HANDLE h; 1415 struct acpi_device_scan_ctx ctx; 1416 1417 if (acpi_disabled("children")) 1418 return (AE_OK); 1419 1420 if (dev == NULL) 1421 h = ACPI_ROOT_OBJECT; 1422 else if ((h = acpi_get_handle(dev)) == NULL) 1423 return (AE_BAD_PARAMETER); 1424 ctx.user_fn = user_fn; 1425 ctx.arg = arg; 1426 ctx.parent = h; 1427 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1428 acpi_device_scan_cb, NULL, &ctx, NULL)); 1429 } 1430 1431 /* 1432 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1433 * device power states since it's close enough to ACPI. 1434 */ 1435 static int 1436 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1437 { 1438 ACPI_HANDLE h; 1439 ACPI_STATUS status; 1440 int error; 1441 1442 error = 0; 1443 h = acpi_get_handle(child); 1444 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1445 return (EINVAL); 1446 if (h == NULL) 1447 return (0); 1448 1449 /* Ignore errors if the power methods aren't present. */ 1450 status = acpi_pwr_switch_consumer(h, state); 1451 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1452 && status != AE_BAD_PARAMETER) 1453 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1454 state, acpi_name(h), AcpiFormatException(status)); 1455 1456 return (error); 1457 } 1458 1459 static int 1460 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1461 { 1462 int result, cid_count, i; 1463 uint32_t lid, cids[8]; 1464 1465 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1466 1467 /* 1468 * ISA-style drivers attached to ACPI may persist and 1469 * probe manually if we return ENOENT. We never want 1470 * that to happen, so don't ever return it. 1471 */ 1472 result = ENXIO; 1473 1474 /* Scan the supplied IDs for a match */ 1475 lid = acpi_isa_get_logicalid(child); 1476 cid_count = acpi_isa_get_compatid(child, cids, 8); 1477 while (ids && ids->ip_id) { 1478 if (lid == ids->ip_id) { 1479 result = 0; 1480 goto out; 1481 } 1482 for (i = 0; i < cid_count; i++) { 1483 if (cids[i] == ids->ip_id) { 1484 result = 0; 1485 goto out; 1486 } 1487 } 1488 ids++; 1489 } 1490 1491 out: 1492 if (result == 0 && ids->ip_desc) 1493 device_set_desc(child, ids->ip_desc); 1494 1495 return_VALUE (result); 1496 } 1497 1498 /* 1499 * Look for a MCFG table. If it is present, use the settings for 1500 * domain (segment) 0 to setup PCI config space access via the memory 1501 * map. 1502 */ 1503 static void 1504 acpi_enable_pcie(void) 1505 { 1506 ACPI_TABLE_HEADER *hdr; 1507 ACPI_MCFG_ALLOCATION *alloc, *end; 1508 ACPI_STATUS status; 1509 1510 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1511 if (ACPI_FAILURE(status)) 1512 return; 1513 1514 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1515 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1516 while (alloc < end) { 1517 if (alloc->PciSegment == 0) { 1518 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1519 alloc->EndBusNumber); 1520 return; 1521 } 1522 alloc++; 1523 } 1524 } 1525 1526 /* 1527 * Scan all of the ACPI namespace and attach child devices. 1528 * 1529 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1530 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1531 * However, in violation of the spec, some systems place their PCI link 1532 * devices in \, so we have to walk the whole namespace. We check the 1533 * type of namespace nodes, so this should be ok. 1534 */ 1535 static void 1536 acpi_probe_children(device_t bus) 1537 { 1538 1539 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1540 1541 /* 1542 * Scan the namespace and insert placeholders for all the devices that 1543 * we find. We also probe/attach any early devices. 1544 * 1545 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1546 * we want to create nodes for all devices, not just those that are 1547 * currently present. (This assumes that we don't want to create/remove 1548 * devices as they appear, which might be smarter.) 1549 */ 1550 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1551 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1552 acpi_probe_child, NULL, bus, NULL); 1553 1554 /* Pre-allocate resources for our rman from any sysresource devices. */ 1555 acpi_sysres_alloc(bus); 1556 /* Create any static children by calling device identify methods. */ 1557 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1558 bus_generic_probe(bus); 1559 1560 /* Probe/attach all children, created staticly and from the namespace. */ 1561 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1562 bus_generic_attach(bus); 1563 1564 /* 1565 * Some of these children may have attached others as part of their attach 1566 * process (eg. the root PCI bus driver), so rescan. 1567 */ 1568 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1569 bus_generic_attach(bus); 1570 1571 /* Attach wake sysctls. */ 1572 acpi_wake_sysctl_walk(bus); 1573 1574 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1575 return_VOID; 1576 } 1577 1578 /* 1579 * Determine the probe order for a given device. 1580 */ 1581 static void 1582 acpi_probe_order(ACPI_HANDLE handle, int *order) 1583 { 1584 ACPI_OBJECT_TYPE type; 1585 1586 /* 1587 * 1. I/O port and memory system resource holders 1588 * 2. Embedded controllers (to handle early accesses) 1589 * 3. PCI Link Devices 1590 * 100000. CPUs 1591 */ 1592 AcpiGetType(handle, &type); 1593 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1594 *order = 1; 1595 else if (acpi_MatchHid(handle, "PNP0C09")) 1596 *order = 2; 1597 else if (acpi_MatchHid(handle, "PNP0C0F")) 1598 *order = 3; 1599 else if (type == ACPI_TYPE_PROCESSOR) 1600 *order = 100000; 1601 } 1602 1603 /* 1604 * Evaluate a child device and determine whether we might attach a device to 1605 * it. 1606 */ 1607 static ACPI_STATUS 1608 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1609 { 1610 struct acpi_prw_data prw; 1611 ACPI_OBJECT_TYPE type; 1612 ACPI_HANDLE h; 1613 device_t bus, child; 1614 int order; 1615 char *handle_str; 1616 1617 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1618 1619 if (acpi_disabled("children")) 1620 return_ACPI_STATUS (AE_OK); 1621 1622 /* Skip this device if we think we'll have trouble with it. */ 1623 if (acpi_avoid(handle)) 1624 return_ACPI_STATUS (AE_OK); 1625 1626 bus = (device_t)context; 1627 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1628 handle_str = acpi_name(handle); 1629 switch (type) { 1630 case ACPI_TYPE_DEVICE: 1631 /* 1632 * Since we scan from \, be sure to skip system scope objects. 1633 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1634 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1635 * during the intialization and \_TZ_ is to support Notify() on it. 1636 */ 1637 if (strcmp(handle_str, "\\_SB_") == 0 || 1638 strcmp(handle_str, "\\_TZ_") == 0) 1639 break; 1640 1641 if (acpi_parse_prw(handle, &prw) == 0) 1642 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1643 1644 /* FALLTHROUGH */ 1645 case ACPI_TYPE_PROCESSOR: 1646 case ACPI_TYPE_THERMAL: 1647 case ACPI_TYPE_POWER: 1648 /* 1649 * Create a placeholder device for this node. Sort the 1650 * placeholder so that the probe/attach passes will run 1651 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1652 * are reserved for special objects (i.e., system 1653 * resources). CPU devices have a very high order to 1654 * ensure they are probed after other devices. 1655 */ 1656 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1657 order = level * 10 + 100; 1658 acpi_probe_order(handle, &order); 1659 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1660 if (child == NULL) 1661 break; 1662 1663 /* Associate the handle with the device_t and vice versa. */ 1664 acpi_set_handle(child, handle); 1665 AcpiAttachData(handle, acpi_fake_objhandler, child); 1666 1667 /* 1668 * Check that the device is present. If it's not present, 1669 * leave it disabled (so that we have a device_t attached to 1670 * the handle, but we don't probe it). 1671 * 1672 * XXX PCI link devices sometimes report "present" but not 1673 * "functional" (i.e. if disabled). Go ahead and probe them 1674 * anyway since we may enable them later. 1675 */ 1676 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1677 /* Never disable PCI link devices. */ 1678 if (acpi_MatchHid(handle, "PNP0C0F")) 1679 break; 1680 /* 1681 * Docking stations should remain enabled since the system 1682 * may be undocked at boot. 1683 */ 1684 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1685 break; 1686 1687 device_disable(child); 1688 break; 1689 } 1690 1691 /* 1692 * Get the device's resource settings and attach them. 1693 * Note that if the device has _PRS but no _CRS, we need 1694 * to decide when it's appropriate to try to configure the 1695 * device. Ignore the return value here; it's OK for the 1696 * device not to have any resources. 1697 */ 1698 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1699 break; 1700 } 1701 } 1702 1703 return_ACPI_STATUS (AE_OK); 1704 } 1705 1706 /* 1707 * AcpiAttachData() requires an object handler but never uses it. This is a 1708 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1709 */ 1710 void 1711 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1712 { 1713 } 1714 1715 static void 1716 acpi_shutdown_final(void *arg, int howto) 1717 { 1718 struct acpi_softc *sc; 1719 ACPI_STATUS status; 1720 1721 /* 1722 * XXX Shutdown code should only run on the BSP (cpuid 0). 1723 * Some chipsets do not power off the system correctly if called from 1724 * an AP. 1725 */ 1726 sc = arg; 1727 if ((howto & RB_POWEROFF) != 0) { 1728 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1729 if (ACPI_FAILURE(status)) { 1730 kprintf("AcpiEnterSleepStatePrep failed - %s\n", 1731 AcpiFormatException(status)); 1732 return; 1733 } 1734 kprintf("Powering system off using ACPI\n"); 1735 ACPI_DISABLE_IRQS(); 1736 status = AcpiEnterSleepState(ACPI_STATE_S5); 1737 if (ACPI_FAILURE(status)) { 1738 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1739 } else { 1740 DELAY(1000000); 1741 kprintf("ACPI power-off failed - timeout\n"); 1742 } 1743 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1744 /* Reboot using the reset register. */ 1745 status = AcpiReset(); 1746 if (ACPI_FAILURE(status)) { 1747 if (status != AE_NOT_EXIST) 1748 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1749 } else { 1750 DELAY(1000000); 1751 kprintf("ACPI reset failed - timeout\n"); 1752 } 1753 } else if (sc->acpi_do_disable && panicstr == NULL) { 1754 /* 1755 * Only disable ACPI if the user requested. On some systems, writing 1756 * the disable value to SMI_CMD hangs the system. 1757 */ 1758 kprintf("Shutting down ACPI\n"); 1759 AcpiTerminate(); 1760 } 1761 } 1762 1763 static void 1764 acpi_enable_fixed_events(struct acpi_softc *sc) 1765 { 1766 static int first_time = 1; 1767 1768 /* Enable and clear fixed events and install handlers. */ 1769 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1770 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1771 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1772 acpi_event_power_button_sleep, sc); 1773 if (first_time) 1774 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1775 } 1776 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1777 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1778 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1779 acpi_event_sleep_button_sleep, sc); 1780 if (first_time) 1781 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1782 } 1783 1784 first_time = 0; 1785 } 1786 1787 /* 1788 * Returns true if the device is actually present and should 1789 * be attached to. This requires the present, enabled, UI-visible 1790 * and diagnostics-passed bits to be set. 1791 */ 1792 BOOLEAN 1793 acpi_DeviceIsPresent(device_t dev) 1794 { 1795 ACPI_DEVICE_INFO *devinfo; 1796 ACPI_HANDLE h; 1797 ACPI_STATUS error; 1798 int ret; 1799 1800 ret = FALSE; 1801 if ((h = acpi_get_handle(dev)) == NULL) 1802 return (FALSE); 1803 error = AcpiGetObjectInfo(h, &devinfo); 1804 if (ACPI_FAILURE(error)) 1805 return (FALSE); 1806 1807 /* If no _STA method, must be present */ 1808 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1809 ret = TRUE; 1810 1811 /* Return true for 'present' and 'functioning' */ 1812 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1813 ret = TRUE; 1814 1815 AcpiOsFree(devinfo); 1816 return (ret); 1817 } 1818 1819 /* 1820 * Returns true if the battery is actually present and inserted. 1821 */ 1822 BOOLEAN 1823 acpi_BatteryIsPresent(device_t dev) 1824 { 1825 ACPI_DEVICE_INFO *devinfo; 1826 ACPI_HANDLE h; 1827 ACPI_STATUS error; 1828 int ret; 1829 1830 ret = FALSE; 1831 if ((h = acpi_get_handle(dev)) == NULL) 1832 return (FALSE); 1833 error = AcpiGetObjectInfo(h, &devinfo); 1834 if (ACPI_FAILURE(error)) 1835 return (FALSE); 1836 1837 /* If no _STA method, must be present */ 1838 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1839 ret = TRUE; 1840 1841 /* Return true for 'present', 'battery present', and 'functioning' */ 1842 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1843 ret = TRUE; 1844 1845 AcpiOsFree(devinfo); 1846 return (ret); 1847 } 1848 1849 /* 1850 * Match a HID string against a handle 1851 */ 1852 BOOLEAN 1853 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1854 { 1855 ACPI_DEVICE_INFO *devinfo; 1856 ACPI_STATUS error; 1857 int ret, i; 1858 1859 ret = FALSE; 1860 if (hid == NULL || h == NULL) 1861 return (ret); 1862 error = AcpiGetObjectInfo(h, &devinfo); 1863 if (ACPI_FAILURE(error)) 1864 return (ret); 1865 1866 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1867 strcmp(hid, devinfo->HardwareId.String) == 0) 1868 ret = TRUE; 1869 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1870 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1871 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1872 ret = TRUE; 1873 break; 1874 } 1875 } 1876 } 1877 1878 AcpiOsFree(devinfo); 1879 return (ret); 1880 } 1881 1882 /* 1883 * Return the handle of a named object within our scope, ie. that of (parent) 1884 * or one if its parents. 1885 */ 1886 ACPI_STATUS 1887 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1888 { 1889 ACPI_HANDLE r; 1890 ACPI_STATUS status; 1891 1892 /* Walk back up the tree to the root */ 1893 for (;;) { 1894 status = AcpiGetHandle(parent, path, &r); 1895 if (ACPI_SUCCESS(status)) { 1896 *result = r; 1897 return (AE_OK); 1898 } 1899 /* XXX Return error here? */ 1900 if (status != AE_NOT_FOUND) 1901 return (AE_OK); 1902 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1903 return (AE_NOT_FOUND); 1904 parent = r; 1905 } 1906 } 1907 1908 /* 1909 * Allocate a buffer with a preset data size. 1910 */ 1911 ACPI_BUFFER * 1912 acpi_AllocBuffer(int size) 1913 { 1914 ACPI_BUFFER *buf; 1915 1916 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1917 return (NULL); 1918 buf->Length = size; 1919 buf->Pointer = (void *)(buf + 1); 1920 return (buf); 1921 } 1922 1923 ACPI_STATUS 1924 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1925 { 1926 ACPI_OBJECT arg1; 1927 ACPI_OBJECT_LIST args; 1928 1929 arg1.Type = ACPI_TYPE_INTEGER; 1930 arg1.Integer.Value = number; 1931 args.Count = 1; 1932 args.Pointer = &arg1; 1933 1934 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1935 } 1936 1937 /* 1938 * Evaluate a path that should return an integer. 1939 */ 1940 ACPI_STATUS 1941 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1942 { 1943 ACPI_STATUS status; 1944 ACPI_BUFFER buf; 1945 ACPI_OBJECT param; 1946 1947 if (handle == NULL) 1948 handle = ACPI_ROOT_OBJECT; 1949 1950 /* 1951 * Assume that what we've been pointed at is an Integer object, or 1952 * a method that will return an Integer. 1953 */ 1954 buf.Pointer = ¶m; 1955 buf.Length = sizeof(param); 1956 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1957 if (ACPI_SUCCESS(status)) { 1958 if (param.Type == ACPI_TYPE_INTEGER) 1959 *number = param.Integer.Value; 1960 else 1961 status = AE_TYPE; 1962 } 1963 1964 /* 1965 * In some applications, a method that's expected to return an Integer 1966 * may instead return a Buffer (probably to simplify some internal 1967 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1968 * convert it into an Integer as best we can. 1969 * 1970 * This is a hack. 1971 */ 1972 if (status == AE_BUFFER_OVERFLOW) { 1973 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1974 status = AE_NO_MEMORY; 1975 } else { 1976 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1977 if (ACPI_SUCCESS(status)) 1978 status = acpi_ConvertBufferToInteger(&buf, number); 1979 AcpiOsFree(buf.Pointer); 1980 } 1981 } 1982 return (status); 1983 } 1984 1985 ACPI_STATUS 1986 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1987 { 1988 ACPI_OBJECT *p; 1989 UINT8 *val; 1990 int i; 1991 1992 p = (ACPI_OBJECT *)bufp->Pointer; 1993 if (p->Type == ACPI_TYPE_INTEGER) { 1994 *number = p->Integer.Value; 1995 return (AE_OK); 1996 } 1997 if (p->Type != ACPI_TYPE_BUFFER) 1998 return (AE_TYPE); 1999 if (p->Buffer.Length > sizeof(int)) 2000 return (AE_BAD_DATA); 2001 2002 *number = 0; 2003 val = p->Buffer.Pointer; 2004 for (i = 0; i < p->Buffer.Length; i++) 2005 *number += val[i] << (i * 8); 2006 return (AE_OK); 2007 } 2008 2009 /* 2010 * Iterate over the elements of an a package object, calling the supplied 2011 * function for each element. 2012 * 2013 * XXX possible enhancement might be to abort traversal on error. 2014 */ 2015 ACPI_STATUS 2016 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2017 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2018 { 2019 ACPI_OBJECT *comp; 2020 int i; 2021 2022 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2023 return (AE_BAD_PARAMETER); 2024 2025 /* Iterate over components */ 2026 i = 0; 2027 comp = pkg->Package.Elements; 2028 for (; i < pkg->Package.Count; i++, comp++) 2029 func(comp, arg); 2030 2031 return (AE_OK); 2032 } 2033 2034 /* 2035 * Find the (index)th resource object in a set. 2036 */ 2037 ACPI_STATUS 2038 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2039 { 2040 ACPI_RESOURCE *rp; 2041 int i; 2042 2043 rp = (ACPI_RESOURCE *)buf->Pointer; 2044 i = index; 2045 while (i-- > 0) { 2046 /* Range check */ 2047 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2048 return (AE_BAD_PARAMETER); 2049 2050 /* Check for terminator */ 2051 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2052 return (AE_NOT_FOUND); 2053 rp = ACPI_NEXT_RESOURCE(rp); 2054 } 2055 if (resp != NULL) 2056 *resp = rp; 2057 2058 return (AE_OK); 2059 } 2060 2061 /* 2062 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2063 * 2064 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2065 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2066 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2067 * resources. 2068 */ 2069 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2070 2071 ACPI_STATUS 2072 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2073 { 2074 ACPI_RESOURCE *rp; 2075 void *newp; 2076 2077 /* Initialise the buffer if necessary. */ 2078 if (buf->Pointer == NULL) { 2079 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2080 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2081 return (AE_NO_MEMORY); 2082 rp = (ACPI_RESOURCE *)buf->Pointer; 2083 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2084 rp->Length = 0; 2085 } 2086 if (res == NULL) 2087 return (AE_OK); 2088 2089 /* 2090 * Scan the current buffer looking for the terminator. 2091 * This will either find the terminator or hit the end 2092 * of the buffer and return an error. 2093 */ 2094 rp = (ACPI_RESOURCE *)buf->Pointer; 2095 for (;;) { 2096 /* Range check, don't go outside the buffer */ 2097 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2098 return (AE_BAD_PARAMETER); 2099 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2100 break; 2101 rp = ACPI_NEXT_RESOURCE(rp); 2102 } 2103 2104 /* 2105 * Check the size of the buffer and expand if required. 2106 * 2107 * Required size is: 2108 * size of existing resources before terminator + 2109 * size of new resource and header + 2110 * size of terminator. 2111 * 2112 * Note that this loop should really only run once, unless 2113 * for some reason we are stuffing a *really* huge resource. 2114 */ 2115 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2116 res->Length + ACPI_RS_SIZE_NO_DATA + 2117 ACPI_RS_SIZE_MIN) >= buf->Length) { 2118 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2119 return (AE_NO_MEMORY); 2120 bcopy(buf->Pointer, newp, buf->Length); 2121 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2122 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2123 AcpiOsFree(buf->Pointer); 2124 buf->Pointer = newp; 2125 buf->Length += buf->Length; 2126 } 2127 2128 /* Insert the new resource. */ 2129 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2130 2131 /* And add the terminator. */ 2132 rp = ACPI_NEXT_RESOURCE(rp); 2133 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2134 rp->Length = 0; 2135 2136 return (AE_OK); 2137 } 2138 2139 /* 2140 * Set interrupt model. 2141 */ 2142 ACPI_STATUS 2143 acpi_SetIntrModel(int model) 2144 { 2145 2146 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2147 } 2148 2149 /* 2150 * DEPRECATED. This interface has serious deficiencies and will be 2151 * removed. 2152 * 2153 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2154 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2155 */ 2156 ACPI_STATUS 2157 acpi_SetSleepState(struct acpi_softc *sc, int state) 2158 { 2159 static int once; 2160 2161 if (!once) { 2162 kprintf( 2163 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2164 once = 1; 2165 } 2166 return (acpi_EnterSleepState(sc, state)); 2167 } 2168 2169 static void 2170 acpi_sleep_force(void *arg) 2171 { 2172 struct acpi_softc *sc; 2173 2174 kprintf("acpi: suspend request timed out, forcing sleep now\n"); 2175 sc = arg; 2176 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2177 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2178 } 2179 2180 /* 2181 * Request that the system enter the given suspend state. All /dev/apm 2182 * devices and devd(8) will be notified. Userland then has a chance to 2183 * save state and acknowledge the request. The system sleeps once all 2184 * acks are in. 2185 */ 2186 int 2187 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2188 { 2189 #ifdef notyet 2190 struct apm_clone_data *clone; 2191 #endif 2192 2193 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2194 return (EINVAL); 2195 2196 /* S5 (soft-off) should be entered directly with no waiting. */ 2197 if (state == ACPI_STATE_S5) { 2198 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2199 return (0); 2200 else 2201 return (ENXIO); 2202 } 2203 2204 #if !defined(__i386__) 2205 /* This platform does not support acpi suspend/resume. */ 2206 return (EOPNOTSUPP); 2207 #endif 2208 2209 /* If a suspend request is already in progress, just return. */ 2210 ACPI_LOCK(acpi); 2211 if (sc->acpi_next_sstate != 0) { 2212 ACPI_UNLOCK(acpi); 2213 return (0); 2214 } 2215 2216 /* Record the pending state and notify all apm devices. */ 2217 sc->acpi_next_sstate = state; 2218 #if 0 2219 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2220 clone->notify_status = APM_EV_NONE; 2221 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2222 KNOTE(&clone->sel_read.si_note, 0); 2223 } 2224 } 2225 #endif 2226 2227 /* If devd(8) is not running, immediately enter the sleep state. */ 2228 if (devctl_process_running() == FALSE) { 2229 ACPI_UNLOCK(acpi); 2230 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2231 return (0); 2232 } else { 2233 return (ENXIO); 2234 } 2235 } 2236 2237 /* Now notify devd(8) also. */ 2238 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2239 2240 /* 2241 * Set a timeout to fire if userland doesn't ack the suspend request 2242 * in time. This way we still eventually go to sleep if we were 2243 * overheating or running low on battery, even if userland is hung. 2244 * We cancel this timeout once all userland acks are in or the 2245 * suspend request is aborted. 2246 */ 2247 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2248 ACPI_UNLOCK(acpi); 2249 return (0); 2250 } 2251 2252 /* 2253 * Acknowledge (or reject) a pending sleep state. The caller has 2254 * prepared for suspend and is now ready for it to proceed. If the 2255 * error argument is non-zero, it indicates suspend should be cancelled 2256 * and gives an errno value describing why. Once all votes are in, 2257 * we suspend the system. 2258 */ 2259 int 2260 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2261 { 2262 struct acpi_softc *sc; 2263 int ret, sleeping; 2264 2265 #if !defined(__i386__) 2266 /* This platform does not support acpi suspend/resume. */ 2267 return (EOPNOTSUPP); 2268 #endif 2269 2270 /* If no pending sleep state, return an error. */ 2271 ACPI_LOCK(acpi); 2272 sc = clone->acpi_sc; 2273 if (sc->acpi_next_sstate == 0) { 2274 ACPI_UNLOCK(acpi); 2275 return (ENXIO); 2276 } 2277 2278 /* Caller wants to abort suspend process. */ 2279 if (error) { 2280 sc->acpi_next_sstate = 0; 2281 callout_stop(&sc->susp_force_to); 2282 kprintf("acpi: listener on %s cancelled the pending suspend\n", 2283 devtoname(clone->cdev)); 2284 ACPI_UNLOCK(acpi); 2285 return (0); 2286 } 2287 2288 /* 2289 * Mark this device as acking the suspend request. Then, walk through 2290 * all devices, seeing if they agree yet. We only count devices that 2291 * are writable since read-only devices couldn't ack the request. 2292 */ 2293 clone->notify_status = APM_EV_ACKED; 2294 sleeping = TRUE; 2295 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2296 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2297 clone->notify_status != APM_EV_ACKED) { 2298 sleeping = FALSE; 2299 break; 2300 } 2301 } 2302 2303 /* If all devices have voted "yes", we will suspend now. */ 2304 if (sleeping) 2305 callout_stop(&sc->susp_force_to); 2306 ACPI_UNLOCK(acpi); 2307 ret = 0; 2308 if (sleeping) { 2309 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2310 ret = ENODEV; 2311 } 2312 2313 return (ret); 2314 } 2315 2316 static void 2317 acpi_sleep_enable(void *arg) 2318 { 2319 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2320 } 2321 2322 enum acpi_sleep_state { 2323 ACPI_SS_NONE, 2324 ACPI_SS_GPE_SET, 2325 ACPI_SS_DEV_SUSPEND, 2326 ACPI_SS_SLP_PREP, 2327 ACPI_SS_SLEPT, 2328 }; 2329 2330 /* 2331 * Enter the desired system sleep state. 2332 * 2333 * Currently we support S1-S5 but S4 is only S4BIOS 2334 */ 2335 static ACPI_STATUS 2336 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2337 { 2338 ACPI_STATUS status; 2339 UINT8 TypeA; 2340 UINT8 TypeB; 2341 enum acpi_sleep_state slp_state; 2342 2343 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2344 2345 /* Re-entry once we're suspending is not allowed. */ 2346 status = AE_OK; 2347 ACPI_LOCK(acpi); 2348 if (sc->acpi_sleep_disabled) { 2349 ACPI_UNLOCK(acpi); 2350 kprintf("acpi: suspend request ignored (not ready yet)\n"); 2351 return (AE_ERROR); 2352 } 2353 sc->acpi_sleep_disabled = 1; 2354 ACPI_UNLOCK(acpi); 2355 2356 /* 2357 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2358 * drivers need this. 2359 */ 2360 //get_mplock(); 2361 slp_state = ACPI_SS_NONE; 2362 switch (state) { 2363 case ACPI_STATE_S1: 2364 case ACPI_STATE_S2: 2365 case ACPI_STATE_S3: 2366 case ACPI_STATE_S4: 2367 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2368 if (status == AE_NOT_FOUND) { 2369 device_printf(sc->acpi_dev, 2370 "Sleep state S%d not supported by BIOS\n", state); 2371 break; 2372 } else if (ACPI_FAILURE(status)) { 2373 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2374 AcpiFormatException(status)); 2375 break; 2376 } 2377 2378 sc->acpi_sstate = state; 2379 2380 /* Enable any GPEs as appropriate and requested by the user. */ 2381 acpi_wake_prep_walk(state); 2382 slp_state = ACPI_SS_GPE_SET; 2383 2384 /* 2385 * Inform all devices that we are going to sleep. If at least one 2386 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2387 * 2388 * XXX Note that a better two-pass approach with a 'veto' pass 2389 * followed by a "real thing" pass would be better, but the current 2390 * bus interface does not provide for this. 2391 */ 2392 if (DEVICE_SUSPEND(root_bus) != 0) { 2393 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2394 break; 2395 } 2396 slp_state = ACPI_SS_DEV_SUSPEND; 2397 2398 /* If testing device suspend only, back out of everything here. */ 2399 if (acpi_susp_bounce) 2400 break; 2401 2402 status = AcpiEnterSleepStatePrep(state); 2403 if (ACPI_FAILURE(status)) { 2404 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2405 AcpiFormatException(status)); 2406 break; 2407 } 2408 slp_state = ACPI_SS_SLP_PREP; 2409 2410 if (sc->acpi_sleep_delay > 0) 2411 DELAY(sc->acpi_sleep_delay * 1000000); 2412 2413 if (state != ACPI_STATE_S1) { 2414 acpi_sleep_machdep(sc, state); 2415 2416 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2417 if (state == ACPI_STATE_S4) 2418 AcpiEnable(); 2419 } else { 2420 ACPI_DISABLE_IRQS(); 2421 status = AcpiEnterSleepState(state); 2422 if (ACPI_FAILURE(status)) { 2423 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2424 AcpiFormatException(status)); 2425 break; 2426 } 2427 } 2428 slp_state = ACPI_SS_SLEPT; 2429 break; 2430 case ACPI_STATE_S5: 2431 /* 2432 * Shut down cleanly and power off. This will call us back through the 2433 * shutdown handlers. 2434 */ 2435 shutdown_nice(RB_POWEROFF); 2436 break; 2437 case ACPI_STATE_S0: 2438 default: 2439 status = AE_BAD_PARAMETER; 2440 break; 2441 } 2442 2443 /* 2444 * Back out state according to how far along we got in the suspend 2445 * process. This handles both the error and success cases. 2446 */ 2447 sc->acpi_next_sstate = 0; 2448 if (slp_state >= ACPI_SS_GPE_SET) { 2449 acpi_wake_prep_walk(state); 2450 sc->acpi_sstate = ACPI_STATE_S0; 2451 } 2452 if (slp_state >= ACPI_SS_SLP_PREP) 2453 AcpiLeaveSleepState(state); 2454 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2455 DEVICE_RESUME(root_bus); 2456 if (slp_state >= ACPI_SS_SLEPT) 2457 acpi_enable_fixed_events(sc); 2458 2459 /* Allow another sleep request after a while. */ 2460 /* XXX: needs timeout */ 2461 if (state != ACPI_STATE_S5) 2462 acpi_sleep_enable(sc); 2463 2464 /* Run /etc/rc.resume after we are back. */ 2465 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2466 2467 //rel_mplock(); 2468 return_ACPI_STATUS (status); 2469 } 2470 2471 /* Enable or disable the device's GPE. */ 2472 int 2473 acpi_wake_set_enable(device_t dev, int enable) 2474 { 2475 struct acpi_prw_data prw; 2476 ACPI_STATUS status; 2477 int flags; 2478 2479 /* Make sure the device supports waking the system and get the GPE. */ 2480 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2481 return (ENXIO); 2482 2483 flags = acpi_get_flags(dev); 2484 if (enable) { 2485 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2486 ACPI_GPE_ENABLE); 2487 if (ACPI_FAILURE(status)) { 2488 device_printf(dev, "enable wake failed\n"); 2489 return (ENXIO); 2490 } 2491 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2492 } else { 2493 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2494 ACPI_GPE_DISABLE); 2495 if (ACPI_FAILURE(status)) { 2496 device_printf(dev, "disable wake failed\n"); 2497 return (ENXIO); 2498 } 2499 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2500 } 2501 2502 return (0); 2503 } 2504 2505 static int 2506 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2507 { 2508 struct acpi_prw_data prw; 2509 device_t dev; 2510 2511 /* Check that this is a wake-capable device and get its GPE. */ 2512 if (acpi_parse_prw(handle, &prw) != 0) 2513 return (ENXIO); 2514 dev = acpi_get_device(handle); 2515 2516 /* 2517 * The destination sleep state must be less than (i.e., higher power) 2518 * or equal to the value specified by _PRW. If this GPE cannot be 2519 * enabled for the next sleep state, then disable it. If it can and 2520 * the user requested it be enabled, turn on any required power resources 2521 * and set _PSW. 2522 */ 2523 if (sstate > prw.lowest_wake) { 2524 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2525 if (bootverbose) 2526 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2527 acpi_name(handle), sstate); 2528 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2529 acpi_pwr_wake_enable(handle, 1); 2530 acpi_SetInteger(handle, "_PSW", 1); 2531 if (bootverbose) 2532 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2533 acpi_name(handle), sstate); 2534 } 2535 2536 return (0); 2537 } 2538 2539 static int 2540 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2541 { 2542 struct acpi_prw_data prw; 2543 device_t dev; 2544 2545 /* 2546 * Check that this is a wake-capable device and get its GPE. Return 2547 * now if the user didn't enable this device for wake. 2548 */ 2549 if (acpi_parse_prw(handle, &prw) != 0) 2550 return (ENXIO); 2551 dev = acpi_get_device(handle); 2552 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2553 return (0); 2554 2555 /* 2556 * If this GPE couldn't be enabled for the previous sleep state, it was 2557 * disabled before going to sleep so re-enable it. If it was enabled, 2558 * clear _PSW and turn off any power resources it used. 2559 */ 2560 if (sstate > prw.lowest_wake) { 2561 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2562 if (bootverbose) 2563 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2564 } else { 2565 acpi_SetInteger(handle, "_PSW", 0); 2566 acpi_pwr_wake_enable(handle, 0); 2567 if (bootverbose) 2568 device_printf(dev, "run_prep cleaned up for %s\n", 2569 acpi_name(handle)); 2570 } 2571 2572 return (0); 2573 } 2574 2575 static ACPI_STATUS 2576 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2577 { 2578 int sstate; 2579 2580 /* If suspending, run the sleep prep function, otherwise wake. */ 2581 sstate = *(int *)context; 2582 if (AcpiGbl_SystemAwakeAndRunning) 2583 acpi_wake_sleep_prep(handle, sstate); 2584 else 2585 acpi_wake_run_prep(handle, sstate); 2586 return (AE_OK); 2587 } 2588 2589 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2590 static int 2591 acpi_wake_prep_walk(int sstate) 2592 { 2593 ACPI_HANDLE sb_handle; 2594 2595 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2596 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2597 acpi_wake_prep, NULL, &sstate, NULL); 2598 } 2599 return (0); 2600 } 2601 2602 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2603 static int 2604 acpi_wake_sysctl_walk(device_t dev) 2605 { 2606 #ifdef notyet 2607 int error, i, numdevs; 2608 device_t *devlist; 2609 device_t child; 2610 ACPI_STATUS status; 2611 2612 error = device_get_children(dev, &devlist, &numdevs); 2613 if (error != 0 || numdevs == 0) { 2614 if (numdevs == 0) 2615 kfree(devlist, M_TEMP); 2616 return (error); 2617 } 2618 for (i = 0; i < numdevs; i++) { 2619 child = devlist[i]; 2620 acpi_wake_sysctl_walk(child); 2621 if (!device_is_attached(child)) 2622 continue; 2623 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2624 if (ACPI_SUCCESS(status)) { 2625 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2626 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2627 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2628 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2629 } 2630 } 2631 kfree(devlist, M_TEMP); 2632 #endif 2633 2634 return (0); 2635 } 2636 2637 #ifdef notyet 2638 /* Enable or disable wake from userland. */ 2639 static int 2640 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2641 { 2642 int enable, error; 2643 device_t dev; 2644 2645 dev = (device_t)arg1; 2646 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2647 2648 error = sysctl_handle_int(oidp, &enable, 0, req); 2649 if (error != 0 || req->newptr == NULL) 2650 return (error); 2651 if (enable != 0 && enable != 1) 2652 return (EINVAL); 2653 2654 return (acpi_wake_set_enable(dev, enable)); 2655 } 2656 #endif 2657 2658 /* Parse a device's _PRW into a structure. */ 2659 int 2660 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2661 { 2662 ACPI_STATUS status; 2663 ACPI_BUFFER prw_buffer; 2664 ACPI_OBJECT *res, *res2; 2665 int error, i, power_count; 2666 2667 if (h == NULL || prw == NULL) 2668 return (EINVAL); 2669 2670 /* 2671 * The _PRW object (7.2.9) is only required for devices that have the 2672 * ability to wake the system from a sleeping state. 2673 */ 2674 error = EINVAL; 2675 prw_buffer.Pointer = NULL; 2676 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2677 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2678 if (ACPI_FAILURE(status)) 2679 return (ENOENT); 2680 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2681 if (res == NULL) 2682 return (ENOENT); 2683 if (!ACPI_PKG_VALID(res, 2)) 2684 goto out; 2685 2686 /* 2687 * Element 1 of the _PRW object: 2688 * The lowest power system sleeping state that can be entered while still 2689 * providing wake functionality. The sleeping state being entered must 2690 * be less than (i.e., higher power) or equal to this value. 2691 */ 2692 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2693 goto out; 2694 2695 /* 2696 * Element 0 of the _PRW object: 2697 */ 2698 switch (res->Package.Elements[0].Type) { 2699 case ACPI_TYPE_INTEGER: 2700 /* 2701 * If the data type of this package element is numeric, then this 2702 * _PRW package element is the bit index in the GPEx_EN, in the 2703 * GPE blocks described in the FADT, of the enable bit that is 2704 * enabled for the wake event. 2705 */ 2706 prw->gpe_handle = NULL; 2707 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2708 error = 0; 2709 break; 2710 case ACPI_TYPE_PACKAGE: 2711 /* 2712 * If the data type of this package element is a package, then this 2713 * _PRW package element is itself a package containing two 2714 * elements. The first is an object reference to the GPE Block 2715 * device that contains the GPE that will be triggered by the wake 2716 * event. The second element is numeric and it contains the bit 2717 * index in the GPEx_EN, in the GPE Block referenced by the 2718 * first element in the package, of the enable bit that is enabled for 2719 * the wake event. 2720 * 2721 * For example, if this field is a package then it is of the form: 2722 * Package() {\_SB.PCI0.ISA.GPE, 2} 2723 */ 2724 res2 = &res->Package.Elements[0]; 2725 if (!ACPI_PKG_VALID(res2, 2)) 2726 goto out; 2727 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2728 if (prw->gpe_handle == NULL) 2729 goto out; 2730 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2731 goto out; 2732 error = 0; 2733 break; 2734 default: 2735 goto out; 2736 } 2737 2738 /* Elements 2 to N of the _PRW object are power resources. */ 2739 power_count = res->Package.Count - 2; 2740 if (power_count > ACPI_PRW_MAX_POWERRES) { 2741 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2742 power_count = 0; 2743 } 2744 prw->power_res_count = power_count; 2745 for (i = 0; i < power_count; i++) 2746 prw->power_res[i] = res->Package.Elements[i]; 2747 2748 out: 2749 if (prw_buffer.Pointer != NULL) 2750 AcpiOsFree(prw_buffer.Pointer); 2751 return (error); 2752 } 2753 2754 /* 2755 * ACPI Event Handlers 2756 */ 2757 2758 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2759 2760 static void 2761 acpi_system_eventhandler_sleep(void *arg, int state) 2762 { 2763 int ret; 2764 2765 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2766 2767 /* Check if button action is disabled. */ 2768 if (state == ACPI_S_STATES_MAX + 1) 2769 return; 2770 2771 /* Request that the system prepare to enter the given suspend state. */ 2772 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2773 if (ret != 0) 2774 kprintf("acpi: request to enter state S%d failed (err %d)\n", 2775 state, ret); 2776 2777 return_VOID; 2778 } 2779 2780 static void 2781 acpi_system_eventhandler_wakeup(void *arg, int state) 2782 { 2783 2784 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2785 2786 /* Currently, nothing to do for wakeup. */ 2787 2788 return_VOID; 2789 } 2790 2791 /* 2792 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2793 */ 2794 UINT32 2795 acpi_event_power_button_sleep(void *context) 2796 { 2797 struct acpi_softc *sc = (struct acpi_softc *)context; 2798 2799 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2800 2801 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2802 2803 return_VALUE (ACPI_INTERRUPT_HANDLED); 2804 } 2805 2806 UINT32 2807 acpi_event_power_button_wake(void *context) 2808 { 2809 struct acpi_softc *sc = (struct acpi_softc *)context; 2810 2811 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2812 2813 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2814 2815 return_VALUE (ACPI_INTERRUPT_HANDLED); 2816 } 2817 2818 UINT32 2819 acpi_event_sleep_button_sleep(void *context) 2820 { 2821 struct acpi_softc *sc = (struct acpi_softc *)context; 2822 2823 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2824 2825 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2826 2827 return_VALUE (ACPI_INTERRUPT_HANDLED); 2828 } 2829 2830 UINT32 2831 acpi_event_sleep_button_wake(void *context) 2832 { 2833 struct acpi_softc *sc = (struct acpi_softc *)context; 2834 2835 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2836 2837 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2838 2839 return_VALUE (ACPI_INTERRUPT_HANDLED); 2840 } 2841 2842 /* 2843 * XXX This static buffer is suboptimal. There is no locking so only 2844 * use this for single-threaded callers. 2845 */ 2846 char * 2847 acpi_name(ACPI_HANDLE handle) 2848 { 2849 ACPI_BUFFER buf; 2850 static char data[256]; 2851 2852 buf.Length = sizeof(data); 2853 buf.Pointer = data; 2854 2855 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2856 return (data); 2857 return ("(unknown)"); 2858 } 2859 2860 /* 2861 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2862 * parts of the namespace. 2863 */ 2864 int 2865 acpi_avoid(ACPI_HANDLE handle) 2866 { 2867 char *cp, *env, *np; 2868 int len; 2869 2870 np = acpi_name(handle); 2871 if (*np == '\\') 2872 np++; 2873 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2874 return (0); 2875 2876 /* Scan the avoid list checking for a match */ 2877 cp = env; 2878 for (;;) { 2879 while (*cp != 0 && isspace(*cp)) 2880 cp++; 2881 if (*cp == 0) 2882 break; 2883 len = 0; 2884 while (cp[len] != 0 && !isspace(cp[len])) 2885 len++; 2886 if (!strncmp(cp, np, len)) { 2887 kfreeenv(env); 2888 return(1); 2889 } 2890 cp += len; 2891 } 2892 kfreeenv(env); 2893 2894 return (0); 2895 } 2896 2897 /* 2898 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2899 */ 2900 int 2901 acpi_disabled(char *subsys) 2902 { 2903 char *cp, *env; 2904 int len; 2905 2906 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 2907 return (0); 2908 if (strcmp(env, "all") == 0) { 2909 kfreeenv(env); 2910 return (1); 2911 } 2912 2913 /* Scan the disable list, checking for a match. */ 2914 cp = env; 2915 for (;;) { 2916 while (*cp != '\0' && isspace(*cp)) 2917 cp++; 2918 if (*cp == '\0') 2919 break; 2920 len = 0; 2921 while (cp[len] != '\0' && !isspace(cp[len])) 2922 len++; 2923 if (strncmp(cp, subsys, len) == 0) { 2924 kfreeenv(env); 2925 return (1); 2926 } 2927 cp += len; 2928 } 2929 kfreeenv(env); 2930 2931 return (0); 2932 } 2933 2934 /* 2935 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 2936 * components are enabled by default. The ones that are not have to be 2937 * enabled via debug.acpi.enabled. 2938 */ 2939 int 2940 acpi_enabled(char *subsys) 2941 { 2942 char *cp, *env; 2943 int len; 2944 2945 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 2946 return (0); 2947 if (strcmp(env, "all") == 0) { 2948 kfreeenv(env); 2949 return (1); 2950 } 2951 2952 /* Scan the enable list, checking for a match. */ 2953 cp = env; 2954 for (;;) { 2955 while (*cp != '\0' && isspace(*cp)) 2956 cp++; 2957 if (*cp == '\0') 2958 break; 2959 len = 0; 2960 while (cp[len] != '\0' && !isspace(cp[len])) 2961 len++; 2962 if (strncmp(cp, subsys, len) == 0) { 2963 kfreeenv(env); 2964 return (1); 2965 } 2966 cp += len; 2967 } 2968 kfreeenv(env); 2969 2970 return (0); 2971 } 2972 2973 /* 2974 * Control interface. 2975 * 2976 * We multiplex ioctls for all participating ACPI devices here. Individual 2977 * drivers wanting to be accessible via /dev/acpi should use the 2978 * register/deregister interface to make their handlers visible. 2979 */ 2980 struct acpi_ioctl_hook 2981 { 2982 TAILQ_ENTRY(acpi_ioctl_hook) link; 2983 u_long cmd; 2984 acpi_ioctl_fn fn; 2985 void *arg; 2986 }; 2987 2988 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2989 static int acpi_ioctl_hooks_initted; 2990 2991 int 2992 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2993 { 2994 struct acpi_ioctl_hook *hp; 2995 2996 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2997 return (ENOMEM); 2998 hp->cmd = cmd; 2999 hp->fn = fn; 3000 hp->arg = arg; 3001 3002 ACPI_LOCK(acpi); 3003 if (acpi_ioctl_hooks_initted == 0) { 3004 TAILQ_INIT(&acpi_ioctl_hooks); 3005 acpi_ioctl_hooks_initted = 1; 3006 } 3007 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3008 ACPI_UNLOCK(acpi); 3009 3010 return (0); 3011 } 3012 3013 void 3014 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3015 { 3016 struct acpi_ioctl_hook *hp; 3017 3018 ACPI_LOCK(acpi); 3019 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3020 if (hp->cmd == cmd && hp->fn == fn) 3021 break; 3022 3023 if (hp != NULL) { 3024 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3025 kfree(hp, M_ACPIDEV); 3026 } 3027 ACPI_UNLOCK(acpi); 3028 } 3029 3030 static int 3031 acpiopen(struct dev_open_args *ap) 3032 { 3033 return (0); 3034 } 3035 3036 static int 3037 acpiclose(struct dev_close_args *ap) 3038 { 3039 return (0); 3040 } 3041 3042 static int 3043 acpiioctl(struct dev_ioctl_args *ap) 3044 { 3045 struct acpi_softc *sc; 3046 struct acpi_ioctl_hook *hp; 3047 int error, state; 3048 3049 error = 0; 3050 hp = NULL; 3051 sc = ap->a_head.a_dev->si_drv1; 3052 3053 /* 3054 * Scan the list of registered ioctls, looking for handlers. 3055 */ 3056 ACPI_LOCK(acpi); 3057 if (acpi_ioctl_hooks_initted) 3058 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3059 if (hp->cmd == ap->a_cmd) 3060 break; 3061 } 3062 ACPI_UNLOCK(acpi); 3063 if (hp) 3064 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3065 3066 /* 3067 * Core ioctls are not permitted for non-writable user. 3068 * Currently, other ioctls just fetch information. 3069 * Not changing system behavior. 3070 */ 3071 if ((ap->a_fflag & FWRITE) == 0) 3072 return (EPERM); 3073 3074 /* Core system ioctls. */ 3075 switch (ap->a_cmd) { 3076 case ACPIIO_REQSLPSTATE: 3077 state = *(int *)ap->a_data; 3078 if (state != ACPI_STATE_S5) 3079 error = acpi_ReqSleepState(sc, state); 3080 else { 3081 kprintf("power off via acpi ioctl not supported\n"); 3082 error = ENXIO; 3083 } 3084 break; 3085 case ACPIIO_ACKSLPSTATE: 3086 error = EOPNOTSUPP; 3087 #if 0 /* notyet */ 3088 error = *(int *)ap->a_data; 3089 error = acpi_AckSleepState(sc->acpi_clone, error); 3090 #endif 3091 break; 3092 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3093 error = EINVAL; 3094 state = *(int *)ap->a_data; 3095 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3096 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3097 error = 0; 3098 break; 3099 default: 3100 error = ENXIO; 3101 break; 3102 } 3103 return (error); 3104 } 3105 3106 static int 3107 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3108 { 3109 int error; 3110 struct sbuf sb; 3111 UINT8 state, TypeA, TypeB; 3112 3113 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3114 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3115 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3116 sbuf_printf(&sb, "S%d ", state); 3117 sbuf_trim(&sb); 3118 sbuf_finish(&sb); 3119 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3120 sbuf_delete(&sb); 3121 return (error); 3122 } 3123 3124 static int 3125 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3126 { 3127 char sleep_state[10]; 3128 int error; 3129 u_int new_state, old_state; 3130 3131 old_state = *(u_int *)oidp->oid_arg1; 3132 if (old_state > ACPI_S_STATES_MAX + 1) 3133 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3134 else 3135 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3136 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3137 if (error == 0 && req->newptr != NULL) { 3138 new_state = ACPI_STATE_S0; 3139 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3140 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3141 break; 3142 if (new_state <= ACPI_S_STATES_MAX + 1) { 3143 if (new_state != old_state) 3144 *(u_int *)oidp->oid_arg1 = new_state; 3145 } else 3146 error = EINVAL; 3147 } 3148 3149 return (error); 3150 } 3151 3152 /* Inform devctl(4) when we receive a Notify. */ 3153 void 3154 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3155 { 3156 char notify_buf[16]; 3157 ACPI_BUFFER handle_buf; 3158 ACPI_STATUS status; 3159 3160 if (subsystem == NULL) 3161 return; 3162 3163 handle_buf.Pointer = NULL; 3164 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3165 status = AcpiNsHandleToPathname(h, &handle_buf); 3166 if (ACPI_FAILURE(status)) 3167 return; 3168 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3169 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3170 AcpiOsFree(handle_buf.Pointer); 3171 } 3172 3173 #ifdef ACPI_DEBUG 3174 /* 3175 * Support for parsing debug options from the kernel environment. 3176 * 3177 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3178 * by specifying the names of the bits in the debug.acpi.layer and 3179 * debug.acpi.level environment variables. Bits may be unset by 3180 * prefixing the bit name with !. 3181 */ 3182 struct debugtag 3183 { 3184 char *name; 3185 UINT32 value; 3186 }; 3187 3188 static struct debugtag dbg_layer[] = { 3189 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3190 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3191 {"ACPI_EVENTS", ACPI_EVENTS}, 3192 {"ACPI_TABLES", ACPI_TABLES}, 3193 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3194 {"ACPI_PARSER", ACPI_PARSER}, 3195 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3196 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3197 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3198 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3199 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3200 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3201 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3202 3203 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3204 {"ACPI_BATTERY", ACPI_BATTERY}, 3205 {"ACPI_BUS", ACPI_BUS}, 3206 {"ACPI_BUTTON", ACPI_BUTTON}, 3207 {"ACPI_EC", ACPI_EC}, 3208 {"ACPI_FAN", ACPI_FAN}, 3209 {"ACPI_POWERRES", ACPI_POWERRES}, 3210 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3211 {"ACPI_THERMAL", ACPI_THERMAL}, 3212 {"ACPI_TIMER", ACPI_TIMER}, 3213 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3214 {NULL, 0} 3215 }; 3216 3217 static struct debugtag dbg_level[] = { 3218 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3219 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3220 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3221 {"ACPI_LV_REPAIR", ACPI_LV_REPAIR}, 3222 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3223 3224 /* Trace verbosity level 1 [Standard Trace Level] */ 3225 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3226 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3227 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3228 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3229 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3230 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3231 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3232 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3233 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3234 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3235 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3236 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3237 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3238 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3239 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3240 3241 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3242 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3243 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3244 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3245 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3246 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3247 3248 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3249 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3250 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3251 {"ACPI_LV_IO", ACPI_LV_IO}, 3252 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3253 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3254 3255 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3256 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3257 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3258 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3259 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3260 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3261 {NULL, 0} 3262 }; 3263 3264 static void 3265 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3266 { 3267 char *ep; 3268 int i, l; 3269 int set; 3270 3271 while (*cp) { 3272 if (isspace(*cp)) { 3273 cp++; 3274 continue; 3275 } 3276 ep = cp; 3277 while (*ep && !isspace(*ep)) 3278 ep++; 3279 if (*cp == '!') { 3280 set = 0; 3281 cp++; 3282 if (cp == ep) 3283 continue; 3284 } else { 3285 set = 1; 3286 } 3287 l = ep - cp; 3288 for (i = 0; tag[i].name != NULL; i++) { 3289 if (!strncmp(cp, tag[i].name, l)) { 3290 if (set) 3291 *flag |= tag[i].value; 3292 else 3293 *flag &= ~tag[i].value; 3294 } 3295 } 3296 cp = ep; 3297 } 3298 } 3299 3300 static void 3301 acpi_set_debugging(void *junk) 3302 { 3303 char *layer, *level; 3304 3305 if (cold) { 3306 AcpiDbgLayer = 0; 3307 AcpiDbgLevel = 0; 3308 } 3309 3310 layer = kgetenv("debug.acpi.layer"); 3311 level = kgetenv("debug.acpi.level"); 3312 if (layer == NULL && level == NULL) 3313 return; 3314 3315 kprintf("ACPI set debug"); 3316 if (layer != NULL) { 3317 if (strcmp("NONE", layer) != 0) 3318 kprintf(" layer '%s'", layer); 3319 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3320 kfreeenv(layer); 3321 } 3322 if (level != NULL) { 3323 if (strcmp("NONE", level) != 0) 3324 kprintf(" level '%s'", level); 3325 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3326 kfreeenv(level); 3327 } 3328 kprintf("\n"); 3329 } 3330 3331 SYSINIT(acpi_debugging, SI_BOOT1_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3332 NULL); 3333 3334 static int 3335 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3336 { 3337 int error, *dbg; 3338 struct debugtag *tag; 3339 struct sbuf sb; 3340 3341 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3342 return (ENOMEM); 3343 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3344 tag = &dbg_layer[0]; 3345 dbg = &AcpiDbgLayer; 3346 } else { 3347 tag = &dbg_level[0]; 3348 dbg = &AcpiDbgLevel; 3349 } 3350 3351 /* Get old values if this is a get request. */ 3352 ACPI_SERIAL_BEGIN(acpi); 3353 if (*dbg == 0) { 3354 sbuf_cpy(&sb, "NONE"); 3355 } else if (req->newptr == NULL) { 3356 for (; tag->name != NULL; tag++) { 3357 if ((*dbg & tag->value) == tag->value) 3358 sbuf_printf(&sb, "%s ", tag->name); 3359 } 3360 } 3361 sbuf_trim(&sb); 3362 sbuf_finish(&sb); 3363 3364 /* Copy out the old values to the user. */ 3365 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3366 sbuf_delete(&sb); 3367 3368 /* If the user is setting a string, parse it. */ 3369 if (error == 0 && req->newptr != NULL) { 3370 *dbg = 0; 3371 ksetenv((char *)oidp->oid_arg1, (char *)req->newptr); 3372 acpi_set_debugging(NULL); 3373 } 3374 ACPI_SERIAL_END(acpi); 3375 3376 return (error); 3377 } 3378 3379 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3380 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3381 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3382 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3383 #endif /* ACPI_DEBUG */ 3384 3385 static int 3386 acpi_pm_func(u_long cmd, void *arg, ...) 3387 { 3388 int state, acpi_state; 3389 int error; 3390 struct acpi_softc *sc; 3391 va_list ap; 3392 3393 error = 0; 3394 switch (cmd) { 3395 case POWER_CMD_SUSPEND: 3396 sc = (struct acpi_softc *)arg; 3397 if (sc == NULL) { 3398 error = EINVAL; 3399 goto out; 3400 } 3401 3402 va_start(ap, arg); 3403 state = va_arg(ap, int); 3404 va_end(ap); 3405 3406 switch (state) { 3407 case POWER_SLEEP_STATE_STANDBY: 3408 acpi_state = sc->acpi_standby_sx; 3409 break; 3410 case POWER_SLEEP_STATE_SUSPEND: 3411 acpi_state = sc->acpi_suspend_sx; 3412 break; 3413 case POWER_SLEEP_STATE_HIBERNATE: 3414 acpi_state = ACPI_STATE_S4; 3415 break; 3416 default: 3417 error = EINVAL; 3418 goto out; 3419 } 3420 3421 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3422 error = ENXIO; 3423 break; 3424 default: 3425 error = EINVAL; 3426 goto out; 3427 } 3428 3429 out: 3430 return (error); 3431 } 3432 3433 static void 3434 acpi_pm_register(void *arg) 3435 { 3436 if (!cold || resource_disabled("acpi", 0)) 3437 return; 3438 3439 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3440 } 3441 3442 SYSINIT(power, SI_BOOT2_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3443