1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.kfreebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.kfreebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/dev/acpica/acpi.c,v 1.243.2.4.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 #include "opt_acpi.h" 33 #include <sys/param.h> 34 #include <sys/kernel.h> 35 #include <sys/proc.h> 36 #include <sys/fcntl.h> 37 #include <sys/malloc.h> 38 #include <sys/module.h> 39 #include <sys/bus.h> 40 #include <sys/conf.h> 41 #include <sys/reboot.h> 42 #include <sys/sysctl.h> 43 #include <sys/ctype.h> 44 #include <sys/linker.h> 45 #include <sys/power.h> 46 #include <sys/sbuf.h> 47 #include <sys/device.h> 48 #include <sys/spinlock.h> 49 #include <sys/spinlock2.h> 50 51 #include <sys/rman.h> 52 #include <bus/isa/isavar.h> 53 #include <bus/isa/pnpvar.h> 54 55 #include "acpi.h" 56 #include <dev/acpica/acpivar.h> 57 #include <dev/acpica/acpiio.h> 58 #include "achware.h" 59 #include "acnamesp.h" 60 #include "acglobal.h" 61 62 #include "pci_if.h" 63 #include <bus/pci/pci_cfgreg.h> 64 #include <bus/pci/pcivar.h> 65 #include <bus/pci/pci_private.h> 66 67 #include <vm/vm_param.h> 68 69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71 #define GIANT_REQUIRED 72 #define mtx_lock(a) 73 #define mtx_unlock(a) 74 /* Hooks for the ACPI CA debugging infrastructure */ 75 #define _COMPONENT ACPI_BUS 76 ACPI_MODULE_NAME("ACPI") 77 78 static d_open_t acpiopen; 79 static d_close_t acpiclose; 80 static d_ioctl_t acpiioctl; 81 82 static struct dev_ops acpi_ops = { 83 { "acpi", 0, 0 }, 84 .d_open = acpiopen, 85 .d_close = acpiclose, 86 .d_ioctl = acpiioctl 87 }; 88 89 /* Global mutex for locking access to the ACPI subsystem. */ 90 struct lock acpi_lock; 91 /* Bitmap of device quirks. */ 92 int acpi_quirks; 93 94 static int acpi_modevent(struct module *mod, int event, void *junk); 95 static void acpi_identify(driver_t *driver, device_t parent); 96 static int acpi_probe(device_t dev); 97 static int acpi_attach(device_t dev); 98 static int acpi_suspend(device_t dev); 99 static int acpi_resume(device_t dev); 100 static int acpi_shutdown(device_t dev); 101 static device_t acpi_add_child(device_t bus, device_t parent, int order, const char *name, 102 int unit); 103 static int acpi_print_child(device_t bus, device_t child); 104 static void acpi_probe_nomatch(device_t bus, device_t child); 105 static void acpi_driver_added(device_t dev, driver_t *driver); 106 static int acpi_read_ivar(device_t dev, device_t child, int index, 107 uintptr_t *result); 108 static int acpi_write_ivar(device_t dev, device_t child, int index, 109 uintptr_t value); 110 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 111 static int acpi_sysres_alloc(device_t dev); 112 static struct resource *acpi_alloc_resource(device_t bus, device_t child, 113 int type, int *rid, u_long start, u_long end, 114 u_long count, u_int flags, int cpuid); 115 static int acpi_release_resource(device_t bus, device_t child, int type, 116 int rid, struct resource *r); 117 static void acpi_delete_resource(device_t bus, device_t child, int type, 118 int rid); 119 static uint32_t acpi_isa_get_logicalid(device_t dev); 120 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 121 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 122 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 123 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 124 ACPI_BUFFER *ret); 125 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 126 int *dstate); 127 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 128 void *context, void **retval); 129 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 130 int max_depth, acpi_scan_cb_t user_fn, void *arg); 131 static int acpi_set_powerstate_method(device_t bus, device_t child, 132 int state); 133 static int acpi_isa_pnp_probe(device_t bus, device_t child, 134 struct isa_pnp_id *ids); 135 static void acpi_probe_children(device_t bus); 136 static void acpi_probe_order(ACPI_HANDLE handle, int *order); 137 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 138 void *context, void **status); 139 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 140 static void acpi_shutdown_final(void *arg, int howto); 141 static void acpi_enable_fixed_events(struct acpi_softc *sc); 142 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 144 static int acpi_wake_prep_walk(int sstate); 145 static int acpi_wake_sysctl_walk(device_t dev); 146 #ifdef notyet 147 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 148 #endif 149 static void acpi_system_eventhandler_sleep(void *arg, int state); 150 static void acpi_system_eventhandler_wakeup(void *arg, int state); 151 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 152 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 153 static int acpi_pm_func(u_long cmd, void *arg, ...); 154 static int acpi_child_location_str_method(device_t acdev, device_t child, 155 char *buf, size_t buflen); 156 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 157 char *buf, size_t buflen); 158 static void acpi_enable_pcie(void); 159 160 static device_method_t acpi_methods[] = { 161 /* Device interface */ 162 DEVMETHOD(device_identify, acpi_identify), 163 DEVMETHOD(device_probe, acpi_probe), 164 DEVMETHOD(device_attach, acpi_attach), 165 DEVMETHOD(device_shutdown, acpi_shutdown), 166 DEVMETHOD(device_detach, bus_generic_detach), 167 DEVMETHOD(device_suspend, acpi_suspend), 168 DEVMETHOD(device_resume, acpi_resume), 169 170 /* Bus interface */ 171 DEVMETHOD(bus_add_child, acpi_add_child), 172 DEVMETHOD(bus_print_child, acpi_print_child), 173 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 174 DEVMETHOD(bus_driver_added, acpi_driver_added), 175 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 176 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 177 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 178 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 179 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 180 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 181 DEVMETHOD(bus_release_resource, acpi_release_resource), 182 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 183 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 184 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 185 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 186 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 187 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 188 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 189 190 /* ACPI bus */ 191 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 192 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 193 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 194 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 195 196 /* PCI emulation */ 197 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 198 199 /* ISA emulation */ 200 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 201 202 DEVMETHOD_END 203 }; 204 205 static driver_t acpi_driver = { 206 "acpi", 207 acpi_methods, 208 sizeof(struct acpi_softc), 209 }; 210 211 static devclass_t acpi_devclass; 212 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, NULL); 213 MODULE_VERSION(acpi, 1); 214 215 ACPI_SERIAL_DECL(acpi, "ACPI serializer") 216 217 /* Local pools for managing system resources for ACPI child devices. */ 218 static struct rman acpi_rman_io, acpi_rman_mem; 219 220 #define ACPI_MINIMUM_AWAKETIME 5 221 222 static const char* sleep_state_names[] = { 223 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 224 225 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 226 static char acpi_ca_version[12]; 227 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 228 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 229 230 /* 231 * Use this tunable to disable the control method auto-serialization 232 * mechanism that was added in 20140214 and superseded the previous 233 * AcpiGbl_SerializeAllMethods global. 234 */ 235 static int acpi_auto_serialize_methods = 1; 236 TUNABLE_INT("hw.acpi.auto_serialize_methods", &acpi_auto_serialize_methods); 237 238 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 239 static int acpi_do_powerstate = 1; 240 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 241 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 242 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 243 244 /* Allow users to override quirks. */ 245 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 246 247 static int acpi_susp_bounce; 248 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 249 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 250 251 /* 252 * ACPI can only be loaded as a module by the loader; activating it after 253 * system bootstrap time is not useful, and can be fatal to the system. 254 * It also cannot be unloaded, since the entire system bus heirarchy hangs 255 * off it. 256 */ 257 static int 258 acpi_modevent(struct module *mod, int event, void *junk) 259 { 260 switch (event) { 261 case MOD_LOAD: 262 if (!cold) { 263 kprintf("The ACPI driver cannot be loaded after boot.\n"); 264 return (EPERM); 265 } 266 break; 267 case MOD_UNLOAD: 268 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 269 return (EBUSY); 270 break; 271 default: 272 break; 273 } 274 return (0); 275 } 276 277 /* 278 * Perform early initialization. 279 */ 280 ACPI_STATUS 281 acpi_Startup(void) 282 { 283 static int started = 0; 284 ACPI_STATUS status; 285 int val; 286 287 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 288 289 /* Only run the startup code once. The MADT driver also calls this. */ 290 if (started) 291 return_VALUE (AE_OK); 292 started = 1; 293 294 /* 295 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 296 * if more tables exist. 297 */ 298 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 299 kprintf("ACPI: Table initialisation failed: %s\n", 300 AcpiFormatException(status)); 301 return_VALUE (status); 302 } 303 304 /* Set up any quirks we have for this system. */ 305 #ifdef notyet 306 if (acpi_quirks == ACPI_Q_OK) 307 acpi_table_quirks(&acpi_quirks); 308 #endif 309 310 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 311 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 312 acpi_quirks &= ~ACPI_Q_BROKEN; 313 if (acpi_quirks & ACPI_Q_BROKEN) { 314 kprintf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 315 status = AE_SUPPORT; 316 } 317 318 return_VALUE (status); 319 } 320 321 /* 322 * Detect ACPI, perform early initialisation 323 */ 324 static void 325 acpi_identify(driver_t *driver, device_t parent) 326 { 327 device_t child; 328 329 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 330 331 if (!cold) 332 return_VOID; 333 334 /* Check that we haven't been disabled with a hint. */ 335 if (resource_disabled("acpi", 0)) 336 return_VOID; 337 338 /* Make sure we're not being doubly invoked. */ 339 if (device_find_child(parent, "acpi", 0) != NULL) 340 return_VOID; 341 342 ksnprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 343 344 /* Initialize root tables. */ 345 if (ACPI_FAILURE(acpi_Startup())) { 346 kprintf("ACPI: Try disabling either ACPI or apic support.\n"); 347 return_VOID; 348 } 349 350 /* Attach the actual ACPI device. */ 351 if ((child = BUS_ADD_CHILD(parent, parent, 10, "acpi", 0)) == NULL) { 352 device_printf(parent, "device_identify failed\n"); 353 return_VOID; 354 } 355 } 356 357 /* 358 * Fetch some descriptive data from ACPI to put in our attach message. 359 */ 360 static int 361 acpi_probe(device_t dev) 362 { 363 ACPI_TABLE_RSDP *rsdp; 364 ACPI_TABLE_HEADER *rsdt; 365 ACPI_PHYSICAL_ADDRESS paddr; 366 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 367 struct sbuf sb; 368 369 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 370 371 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 372 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 373 device_printf(dev, "probe failed, other PM system enabled.\n"); 374 return_VALUE (ENXIO); 375 } 376 377 if ((paddr = AcpiOsGetRootPointer()) == 0 || 378 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 379 return_VALUE (ENXIO); 380 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 381 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 382 else 383 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 384 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 385 386 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 387 return_VALUE (ENXIO); 388 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 389 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 390 sbuf_trim(&sb); 391 sbuf_putc(&sb, ' '); 392 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 393 sbuf_trim(&sb); 394 sbuf_finish(&sb); 395 device_set_desc_copy(dev, sbuf_data(&sb)); 396 sbuf_delete(&sb); 397 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 398 399 return_VALUE (0); 400 } 401 402 static int 403 acpi_attach(device_t dev) 404 { 405 struct acpi_softc *sc; 406 ACPI_STATUS status; 407 int error, state; 408 UINT32 flags; 409 UINT8 TypeA, TypeB; 410 char *env; 411 412 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 413 414 sc = device_get_softc(dev); 415 sc->acpi_dev = dev; 416 callout_init(&sc->susp_force_to); 417 418 if ((error = acpi_task_thread_init())) { 419 device_printf(dev, "Could not start task thread.\n"); 420 goto out; 421 } 422 423 error = ENXIO; 424 425 /* Initialize resource manager. */ 426 acpi_rman_io.rm_type = RMAN_ARRAY; 427 acpi_rman_io.rm_start = 0; 428 acpi_rman_io.rm_end = 0xffff; 429 acpi_rman_io.rm_descr = "ACPI I/O ports"; 430 if (rman_init(&acpi_rman_io, -1) != 0) 431 panic("acpi rman_init IO ports failed"); 432 acpi_rman_mem.rm_type = RMAN_ARRAY; 433 acpi_rman_mem.rm_start = 0; 434 acpi_rman_mem.rm_end = ~0ul; 435 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 436 if (rman_init(&acpi_rman_mem, -1) != 0) 437 panic("acpi rman_init memory failed"); 438 439 /* Initialise the ACPI mutex */ 440 ACPI_LOCK_INIT(acpi, "acpi"); 441 ACPI_SERIAL_INIT(acpi); 442 443 /* 444 * Set the globals from our tunables. This is needed because ACPI-CA 445 * uses UINT8 for some values and we have no tunable_byte. 446 */ 447 AcpiGbl_AutoSerializeMethods = acpi_auto_serialize_methods; 448 AcpiGbl_EnableInterpreterSlack = TRUE; 449 450 /* Start up the ACPI CA subsystem. */ 451 status = AcpiInitializeSubsystem(); 452 if (ACPI_FAILURE(status)) { 453 device_printf(dev, "Could not initialize Subsystem: %s\n", 454 AcpiFormatException(status)); 455 goto out; 456 } 457 458 /* Load ACPI name space. */ 459 status = AcpiLoadTables(); 460 if (ACPI_FAILURE(status)) { 461 device_printf(dev, "Could not load Namespace: %s\n", 462 AcpiFormatException(status)); 463 goto out; 464 } 465 466 /* Handle MCFG table if present. */ 467 acpi_enable_pcie(); 468 469 /* Install the default address space handlers. */ 470 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 471 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 472 if (ACPI_FAILURE(status)) { 473 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 474 AcpiFormatException(status)); 475 goto out; 476 } 477 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 478 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 479 if (ACPI_FAILURE(status)) { 480 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 481 AcpiFormatException(status)); 482 goto out; 483 } 484 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 485 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 486 if (ACPI_FAILURE(status)) { 487 device_printf(dev, "could not initialise PciConfig handler: %s\n", 488 AcpiFormatException(status)); 489 goto out; 490 } 491 492 /* 493 * Note that some systems (specifically, those with namespace evaluation 494 * issues that require the avoidance of parts of the namespace) must 495 * avoid running _INI and _STA on everything, as well as dodging the final 496 * object init pass. 497 * 498 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 499 * 500 * XXX We should arrange for the object init pass after we have attached 501 * all our child devices, but on many systems it works here. 502 */ 503 flags = 0; 504 if (ktestenv("debug.acpi.avoid")) 505 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 506 507 /* Bring the hardware and basic handlers online. */ 508 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 509 device_printf(dev, "Could not enable ACPI: %s\n", 510 AcpiFormatException(status)); 511 goto out; 512 } 513 514 /* 515 * Fix up the interrupt timer after enabling ACPI, so that the 516 * interrupt cputimer that choked by ACPI power management could 517 * be resurrected before probing various devices. 518 */ 519 DELAY(5000); 520 cputimer_intr_pmfixup(); 521 522 /* 523 * Call the ECDT probe function to provide EC functionality before 524 * the namespace has been evaluated. 525 * 526 * XXX This happens before the sysresource devices have been probed and 527 * attached so its resources come from nexus0. In practice, this isn't 528 * a problem but should be addressed eventually. 529 */ 530 acpi_ec_ecdt_probe(dev); 531 532 /* Bring device objects and regions online. */ 533 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 534 device_printf(dev, "Could not initialize ACPI objects: %s\n", 535 AcpiFormatException(status)); 536 goto out; 537 } 538 539 /* 540 * Setup our sysctl tree. 541 * 542 * XXX: This doesn't check to make sure that none of these fail. 543 */ 544 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 545 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 546 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 547 device_get_name(dev), CTLFLAG_RD, 0, ""); 548 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 549 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 550 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 551 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 552 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 553 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 554 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 555 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 556 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 557 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 558 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 559 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 560 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 561 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 562 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 563 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 564 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 565 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 566 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 567 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 568 "sleep delay"); 569 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 570 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 571 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 572 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 573 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 574 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 575 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 576 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 577 OID_AUTO, "handle_reboot", CTLFLAG_RW, 578 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 579 580 /* 581 * Default to 1 second before sleeping to give some machines time to 582 * stabilize. 583 */ 584 sc->acpi_sleep_delay = 1; 585 if (bootverbose) 586 sc->acpi_verbose = 1; 587 if ((env = kgetenv("hw.acpi.verbose")) != NULL) { 588 if (strcmp(env, "0") != 0) 589 sc->acpi_verbose = 1; 590 kfreeenv(env); 591 } 592 593 /* Only enable reboot by default if the FADT says it is available. */ 594 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) 595 sc->acpi_handle_reboot = 1; 596 597 /* Only enable S4BIOS by default if the FACS says it is available. */ 598 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT) 599 sc->acpi_s4bios = 1; 600 601 /* 602 * Dispatch the default sleep state to devices. The lid switch is set 603 * to NONE by default to avoid surprising users. 604 */ 605 sc->acpi_power_button_sx = ACPI_STATE_S5; 606 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 607 sc->acpi_standby_sx = ACPI_STATE_S1; 608 sc->acpi_suspend_sx = ACPI_STATE_S3; 609 610 /* Pick the first valid sleep state for the sleep button default. */ 611 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 612 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 613 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 614 sc->acpi_sleep_button_sx = state; 615 break; 616 } 617 618 acpi_enable_fixed_events(sc); 619 620 /* 621 * Scan the namespace and attach/initialise children. 622 */ 623 624 /* Register our shutdown handler. */ 625 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 626 SHUTDOWN_PRI_LAST); 627 628 /* 629 * Register our acpi event handlers. 630 * XXX should be configurable eg. via userland policy manager. 631 */ 632 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 633 sc, ACPI_EVENT_PRI_LAST); 634 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 635 sc, ACPI_EVENT_PRI_LAST); 636 637 /* Flag our initial states. */ 638 sc->acpi_enabled = 1; 639 sc->acpi_sstate = ACPI_STATE_S0; 640 sc->acpi_sleep_disabled = 0; 641 /* Create the control device */ 642 sc->acpi_dev_t = make_dev(&acpi_ops, 0, UID_ROOT, GID_WHEEL, 0644, 643 "acpi"); 644 sc->acpi_dev_t->si_drv1 = sc; 645 646 if ((error = acpi_machdep_init(dev))) 647 goto out; 648 649 /* Register ACPI again to pass the correct argument of pm_func. */ 650 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 651 652 if (!acpi_disabled("bus")) 653 acpi_probe_children(dev); 654 655 /* Update all GPEs and enable runtime GPEs. */ 656 status = AcpiUpdateAllGpes(); 657 if (ACPI_FAILURE(status)) { 658 device_printf(dev, "Could not update all GPEs: %s\n", 659 AcpiFormatException(status)); 660 } 661 662 /* Allow sleep request after a while. */ 663 /* timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); */ 664 665 error = 0; 666 667 out: 668 cputimer_intr_pmfixup(); 669 acpi_task_thread_schedule(); 670 return_VALUE (error); 671 } 672 673 static int 674 acpi_suspend(device_t dev) 675 { 676 device_t child, *devlist; 677 int error, i, numdevs, pstate; 678 679 GIANT_REQUIRED; 680 681 /* First give child devices a chance to suspend. */ 682 error = bus_generic_suspend(dev); 683 if (error) 684 return (error); 685 686 /* 687 * Now, set them into the appropriate power state, usually D3. If the 688 * device has an _SxD method for the next sleep state, use that power 689 * state instead. 690 */ 691 device_get_children(dev, &devlist, &numdevs); 692 for (i = 0; i < numdevs; i++) { 693 /* If the device is not attached, we've powered it down elsewhere. */ 694 child = devlist[i]; 695 if (!device_is_attached(child)) 696 continue; 697 698 /* 699 * Default to D3 for all sleep states. The _SxD method is optional 700 * so set the powerstate even if it's absent. 701 */ 702 pstate = PCI_POWERSTATE_D3; 703 error = acpi_device_pwr_for_sleep(device_get_parent(child), 704 child, &pstate); 705 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 706 pci_set_powerstate(child, pstate); 707 } 708 kfree(devlist, M_TEMP); 709 error = 0; 710 711 return (error); 712 } 713 714 static int 715 acpi_resume(device_t dev) 716 { 717 ACPI_HANDLE handle; 718 int i, numdevs; 719 device_t child, *devlist; 720 721 GIANT_REQUIRED; 722 723 /* 724 * Put all devices in D0 before resuming them. Call _S0D on each one 725 * since some systems expect this. 726 */ 727 device_get_children(dev, &devlist, &numdevs); 728 for (i = 0; i < numdevs; i++) { 729 child = devlist[i]; 730 handle = acpi_get_handle(child); 731 if (handle) 732 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 733 if (device_is_attached(child) && acpi_do_powerstate) 734 pci_set_powerstate(child, PCI_POWERSTATE_D0); 735 } 736 kfree(devlist, M_TEMP); 737 738 return (bus_generic_resume(dev)); 739 } 740 741 static int 742 acpi_shutdown(device_t dev) 743 { 744 745 GIANT_REQUIRED; 746 747 /* Allow children to shutdown first. */ 748 bus_generic_shutdown(dev); 749 750 /* 751 * Enable any GPEs that are able to power-on the system (i.e., RTC). 752 * Also, disable any that are not valid for this state (most). 753 */ 754 acpi_wake_prep_walk(ACPI_STATE_S5); 755 756 return (0); 757 } 758 759 /* 760 * Handle a new device being added 761 */ 762 static device_t 763 acpi_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 764 { 765 struct acpi_device *ad; 766 device_t child; 767 768 if ((ad = kmalloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 769 return (NULL); 770 771 resource_list_init(&ad->ad_rl); 772 child = device_add_child_ordered(parent, order, name, unit); 773 if (child != NULL) 774 device_set_ivars(child, ad); 775 else 776 kfree(ad, M_ACPIDEV); 777 return (child); 778 } 779 780 static int 781 acpi_print_child(device_t bus, device_t child) 782 { 783 struct acpi_device *adev = device_get_ivars(child); 784 struct resource_list *rl = &adev->ad_rl; 785 int retval = 0; 786 787 retval += bus_print_child_header(bus, child); 788 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 789 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 790 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 791 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 792 if (device_get_flags(child)) 793 retval += kprintf(" flags %#x", device_get_flags(child)); 794 retval += bus_print_child_footer(bus, child); 795 796 return (retval); 797 } 798 799 /* 800 * If this device is an ACPI child but no one claimed it, attempt 801 * to power it off. We'll power it back up when a driver is added. 802 * 803 * XXX Disabled for now since many necessary devices (like fdc and 804 * ATA) don't claim the devices we created for them but still expect 805 * them to be powered up. 806 */ 807 static void 808 acpi_probe_nomatch(device_t bus, device_t child) 809 { 810 811 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 812 } 813 814 /* 815 * If a new driver has a chance to probe a child, first power it up. 816 * 817 * XXX Disabled for now (see acpi_probe_nomatch for details). 818 */ 819 static void 820 acpi_driver_added(device_t dev, driver_t *driver) 821 { 822 device_t child, *devlist; 823 int i, numdevs; 824 825 DEVICE_IDENTIFY(driver, dev); 826 device_get_children(dev, &devlist, &numdevs); 827 for (i = 0; i < numdevs; i++) { 828 child = devlist[i]; 829 if (device_get_state(child) == DS_NOTPRESENT) { 830 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 831 if (device_probe_and_attach(child) != 0) 832 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 833 } 834 } 835 kfree(devlist, M_TEMP); 836 } 837 838 /* Location hint for devctl(8) */ 839 static int 840 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 841 size_t buflen) 842 { 843 struct acpi_device *dinfo = device_get_ivars(child); 844 845 if (dinfo->ad_handle) 846 ksnprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 847 else 848 ksnprintf(buf, buflen, "unknown"); 849 return (0); 850 } 851 852 /* PnP information for devctl(8) */ 853 static int 854 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 855 size_t buflen) 856 { 857 ACPI_DEVICE_INFO *adinfo; 858 struct acpi_device *dinfo = device_get_ivars(child); 859 char *end; 860 int error; 861 862 error = AcpiGetObjectInfo(dinfo->ad_handle, &adinfo); 863 if (error) { 864 ksnprintf(buf, buflen, "unknown"); 865 } else { 866 ksnprintf(buf, buflen, "_HID=%s _UID=%lu", 867 (adinfo->Valid & ACPI_VALID_HID) ? 868 adinfo->HardwareId.String : "none", 869 (adinfo->Valid & ACPI_VALID_UID) ? 870 strtoul(adinfo->UniqueId.String, &end, 10) : 0); 871 if (adinfo) 872 AcpiOsFree(adinfo); 873 } 874 return (0); 875 } 876 877 /* 878 * Handle per-device ivars 879 */ 880 static int 881 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 882 { 883 struct acpi_device *ad; 884 885 if ((ad = device_get_ivars(child)) == NULL) { 886 kprintf("device has no ivars\n"); 887 return (ENOENT); 888 } 889 890 /* ACPI and ISA compatibility ivars */ 891 switch(index) { 892 case ACPI_IVAR_HANDLE: 893 *(ACPI_HANDLE *)result = ad->ad_handle; 894 break; 895 case ACPI_IVAR_MAGIC: 896 *result = ad->ad_magic; 897 break; 898 case ACPI_IVAR_PRIVATE: 899 *(void **)result = ad->ad_private; 900 break; 901 case ACPI_IVAR_FLAGS: 902 *(int *)result = ad->ad_flags; 903 break; 904 case ISA_IVAR_VENDORID: 905 case ISA_IVAR_SERIAL: 906 case ISA_IVAR_COMPATID: 907 *(int *)result = -1; 908 break; 909 case ISA_IVAR_LOGICALID: 910 *(int *)result = acpi_isa_get_logicalid(child); 911 break; 912 default: 913 return (ENOENT); 914 } 915 916 return (0); 917 } 918 919 static int 920 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 921 { 922 struct acpi_device *ad; 923 924 if ((ad = device_get_ivars(child)) == NULL) { 925 kprintf("device has no ivars\n"); 926 return (ENOENT); 927 } 928 929 switch(index) { 930 case ACPI_IVAR_HANDLE: 931 ad->ad_handle = (ACPI_HANDLE)value; 932 break; 933 case ACPI_IVAR_MAGIC: 934 ad->ad_magic = value; 935 break; 936 case ACPI_IVAR_PRIVATE: 937 ad->ad_private = (void *)value; 938 break; 939 case ACPI_IVAR_FLAGS: 940 ad->ad_flags = (int)value; 941 break; 942 default: 943 panic("bad ivar write request (%d)", index); 944 return (ENOENT); 945 } 946 947 return (0); 948 } 949 950 /* 951 * Handle child resource allocation/removal 952 */ 953 static struct resource_list * 954 acpi_get_rlist(device_t dev, device_t child) 955 { 956 struct acpi_device *ad; 957 958 ad = device_get_ivars(child); 959 return (&ad->ad_rl); 960 } 961 962 /* 963 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 964 * duplicates, we merge any in the sysresource attach routine. 965 */ 966 static int 967 acpi_sysres_alloc(device_t dev) 968 { 969 struct resource *res; 970 struct resource_list *rl; 971 struct resource_list_entry *rle; 972 struct rman *rm; 973 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 974 device_t *children; 975 int child_count, i; 976 /* 977 * Probe/attach any sysresource devices. This would be unnecessary if we 978 * had multi-pass probe/attach. 979 */ 980 if (device_get_children(dev, &children, &child_count) != 0) 981 return (ENXIO); 982 for (i = 0; i < child_count; i++) { 983 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 984 device_probe_and_attach(children[i]); 985 } 986 kfree(children, M_TEMP); 987 988 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 989 if(!rl) 990 return 0; 991 SLIST_FOREACH(rle, rl, link) { 992 if (rle->res != NULL) { 993 device_printf(dev, "duplicate resource for %lx\n", rle->start); 994 continue; 995 } 996 997 /* Only memory and IO resources are valid here. */ 998 switch (rle->type) { 999 case SYS_RES_IOPORT: 1000 rm = &acpi_rman_io; 1001 break; 1002 case SYS_RES_MEMORY: 1003 rm = &acpi_rman_mem; 1004 break; 1005 default: 1006 continue; 1007 } 1008 1009 /* Pre-allocate resource and add to our rman pool. */ 1010 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 1011 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 1012 0, -1); 1013 if (res != NULL) { 1014 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 1015 rle->res = res; 1016 } else 1017 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 1018 rle->start, rle->count, rle->type); 1019 } 1020 return (0); 1021 } 1022 1023 static struct resource * 1024 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1025 u_long start, u_long end, u_long count, u_int flags, int cpuid) 1026 { 1027 ACPI_RESOURCE ares; 1028 struct acpi_device *ad = device_get_ivars(child); 1029 struct resource_list *rl = &ad->ad_rl; 1030 struct resource_list_entry *rle; 1031 struct resource *res; 1032 struct rman *rm; 1033 1034 res = NULL; 1035 1036 /* We only handle memory and IO resources through rman. */ 1037 switch (type) { 1038 case SYS_RES_IOPORT: 1039 rm = &acpi_rman_io; 1040 break; 1041 case SYS_RES_MEMORY: 1042 rm = &acpi_rman_mem; 1043 break; 1044 default: 1045 rm = NULL; 1046 } 1047 1048 ACPI_SERIAL_BEGIN(acpi); 1049 1050 /* 1051 * If this is an allocation of the "default" range for a given RID, and 1052 * we know what the resources for this device are (i.e., they're on the 1053 * child's resource list), use those start/end values. 1054 */ 1055 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1056 rle = resource_list_find(rl, type, *rid); 1057 if (rle == NULL) 1058 goto out; 1059 start = rle->start; 1060 end = rle->end; 1061 count = rle->count; 1062 cpuid = rle->cpuid; 1063 } 1064 1065 /* 1066 * If this is an allocation of a specific range, see if we can satisfy 1067 * the request from our system resource regions. If we can't, pass the 1068 * request up to the parent. 1069 */ 1070 if (start + count - 1 == end && rm != NULL) 1071 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1072 child); 1073 if (res == NULL) { 1074 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1075 start, end, count, flags, cpuid); 1076 } else { 1077 rman_set_rid(res, *rid); 1078 1079 /* If requested, activate the resource using the parent's method. */ 1080 if (flags & RF_ACTIVE) 1081 if (bus_activate_resource(child, type, *rid, res) != 0) { 1082 rman_release_resource(res); 1083 res = NULL; 1084 goto out; 1085 } 1086 } 1087 1088 if (res != NULL && device_get_parent(child) == bus) 1089 switch (type) { 1090 case SYS_RES_IRQ: 1091 /* 1092 * Since bus_config_intr() takes immediate effect, we cannot 1093 * configure the interrupt associated with a device when we 1094 * parse the resources but have to defer it until a driver 1095 * actually allocates the interrupt via bus_alloc_resource(). 1096 * 1097 * XXX: Should we handle the lookup failing? 1098 */ 1099 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1100 acpi_config_intr(child, &ares); 1101 else 1102 kprintf("irq resource not found\n"); 1103 break; 1104 } 1105 1106 out: 1107 ACPI_SERIAL_END(acpi); 1108 return (res); 1109 } 1110 1111 static int 1112 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1113 struct resource *r) 1114 { 1115 struct rman *rm; 1116 int ret; 1117 1118 /* We only handle memory and IO resources through rman. */ 1119 switch (type) { 1120 case SYS_RES_IOPORT: 1121 rm = &acpi_rman_io; 1122 break; 1123 case SYS_RES_MEMORY: 1124 rm = &acpi_rman_mem; 1125 break; 1126 default: 1127 rm = NULL; 1128 } 1129 1130 ACPI_SERIAL_BEGIN(acpi); 1131 1132 /* 1133 * If this resource belongs to one of our internal managers, 1134 * deactivate it and release it to the local pool. If it doesn't, 1135 * pass this request up to the parent. 1136 */ 1137 if (rm != NULL && rman_is_region_manager(r, rm)) { 1138 if (rman_get_flags(r) & RF_ACTIVE) { 1139 ret = bus_deactivate_resource(child, type, rid, r); 1140 if (ret != 0) 1141 goto out; 1142 } 1143 ret = rman_release_resource(r); 1144 } else 1145 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1146 1147 out: 1148 ACPI_SERIAL_END(acpi); 1149 return (ret); 1150 } 1151 1152 static void 1153 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1154 { 1155 struct resource_list *rl; 1156 1157 rl = acpi_get_rlist(bus, child); 1158 resource_list_delete(rl, type, rid); 1159 } 1160 1161 /* Allocate an IO port or memory resource, given its GAS. */ 1162 int 1163 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1164 struct resource **res, u_int flags) 1165 { 1166 int error, res_type; 1167 1168 error = ENOMEM; 1169 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1170 return (EINVAL); 1171 1172 /* We only support memory and IO spaces. */ 1173 switch (gas->SpaceId) { 1174 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1175 res_type = SYS_RES_MEMORY; 1176 break; 1177 case ACPI_ADR_SPACE_SYSTEM_IO: 1178 res_type = SYS_RES_IOPORT; 1179 break; 1180 default: 1181 return (EOPNOTSUPP); 1182 } 1183 1184 /* 1185 * If the register width is less than 8, assume the BIOS author means 1186 * it is a bit field and just allocate a byte. 1187 */ 1188 if (gas->BitWidth && gas->BitWidth < 8) 1189 gas->BitWidth = 8; 1190 1191 /* Validate the address after we're sure we support the space. */ 1192 if (gas->Address == 0 || gas->BitWidth == 0) 1193 return (EINVAL); 1194 1195 bus_set_resource(dev, res_type, *rid, gas->Address, 1196 gas->BitWidth / 8, -1); 1197 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1198 if (*res != NULL) { 1199 *type = res_type; 1200 error = 0; 1201 } else 1202 bus_delete_resource(dev, res_type, *rid); 1203 1204 return (error); 1205 } 1206 1207 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1208 static uint32_t 1209 acpi_isa_get_logicalid(device_t dev) 1210 { 1211 ACPI_DEVICE_INFO *devinfo; 1212 ACPI_HANDLE h; 1213 ACPI_STATUS error; 1214 u_int32_t pnpid; 1215 1216 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1217 1218 devinfo = NULL; 1219 pnpid = 0; 1220 1221 /* Fetch and validate the HID. */ 1222 if ((h = acpi_get_handle(dev)) == NULL) 1223 goto out; 1224 error = AcpiGetObjectInfo(h, &devinfo); 1225 if (ACPI_FAILURE(error)) 1226 goto out; 1227 1228 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1229 pnpid = PNP_EISAID(devinfo->HardwareId.String); 1230 1231 out: 1232 if (devinfo) 1233 AcpiOsFree(devinfo); 1234 return_VALUE (pnpid); 1235 } 1236 1237 static int 1238 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1239 { 1240 ACPI_DEVICE_INFO *devinfo; 1241 ACPI_HANDLE h; 1242 ACPI_STATUS error; 1243 uint32_t *pnpid; 1244 int valid, i; 1245 1246 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1247 1248 devinfo = NULL; 1249 pnpid = cids; 1250 valid = 0; 1251 1252 /* Fetch and validate the CID */ 1253 if ((h = acpi_get_handle(dev)) == NULL) 1254 goto out; 1255 error = AcpiGetObjectInfo(h, &devinfo); 1256 if (ACPI_FAILURE(error)) 1257 goto out; 1258 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1259 goto out; 1260 1261 if (devinfo->CompatibleIdList.Count < count) 1262 count = devinfo->CompatibleIdList.Count; 1263 for (i = 0; i < count; i++) { 1264 if (strncmp(devinfo->CompatibleIdList.Ids[i].String, "PNP", 3) != 0) 1265 continue; 1266 *pnpid++ = PNP_EISAID(devinfo->CompatibleIdList.Ids[i].String); 1267 valid++; 1268 } 1269 1270 out: 1271 if (devinfo) 1272 AcpiOsFree(devinfo); 1273 return_VALUE (valid); 1274 } 1275 1276 static char * 1277 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1278 { 1279 ACPI_HANDLE h; 1280 int i; 1281 1282 h = acpi_get_handle(dev); 1283 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1284 return (NULL); 1285 1286 /* Try to match one of the array of IDs with a HID or CID. */ 1287 for (i = 0; ids[i] != NULL; i++) { 1288 if (acpi_MatchHid(h, ids[i])) 1289 return (ids[i]); 1290 } 1291 return (NULL); 1292 } 1293 1294 static ACPI_STATUS 1295 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1296 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1297 { 1298 ACPI_HANDLE h; 1299 1300 if (dev == NULL) 1301 h = ACPI_ROOT_OBJECT; 1302 else if ((h = acpi_get_handle(dev)) == NULL) 1303 return (AE_BAD_PARAMETER); 1304 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1305 } 1306 1307 static int 1308 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1309 { 1310 struct acpi_softc *sc; 1311 ACPI_HANDLE handle; 1312 ACPI_STATUS status; 1313 char sxd[8]; 1314 int error; 1315 1316 sc = device_get_softc(bus); 1317 handle = acpi_get_handle(dev); 1318 1319 /* 1320 * XXX If we find these devices, don't try to power them down. 1321 * The serial and IRDA ports on my T23 hang the system when 1322 * set to D3 and it appears that such legacy devices may 1323 * need special handling in their drivers. 1324 */ 1325 if (handle == NULL || 1326 acpi_MatchHid(handle, "PNP0500") || 1327 acpi_MatchHid(handle, "PNP0501") || 1328 acpi_MatchHid(handle, "PNP0502") || 1329 acpi_MatchHid(handle, "PNP0510") || 1330 acpi_MatchHid(handle, "PNP0511")) 1331 return (ENXIO); 1332 1333 /* 1334 * Override next state with the value from _SxD, if present. If no 1335 * dstate argument was provided, don't fetch the return value. 1336 */ 1337 ksnprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1338 if (dstate) 1339 status = acpi_GetInteger(handle, sxd, dstate); 1340 else 1341 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1342 1343 switch (status) { 1344 case AE_OK: 1345 error = 0; 1346 break; 1347 case AE_NOT_FOUND: 1348 error = ESRCH; 1349 break; 1350 default: 1351 error = ENXIO; 1352 break; 1353 } 1354 1355 return (error); 1356 } 1357 1358 /* Callback arg for our implementation of walking the namespace. */ 1359 struct acpi_device_scan_ctx { 1360 acpi_scan_cb_t user_fn; 1361 void *arg; 1362 ACPI_HANDLE parent; 1363 }; 1364 1365 static ACPI_STATUS 1366 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1367 { 1368 struct acpi_device_scan_ctx *ctx; 1369 device_t dev, old_dev; 1370 ACPI_STATUS status; 1371 ACPI_OBJECT_TYPE type; 1372 1373 /* 1374 * Skip this device if we think we'll have trouble with it or it is 1375 * the parent where the scan began. 1376 */ 1377 ctx = (struct acpi_device_scan_ctx *)arg; 1378 if (acpi_avoid(h) || h == ctx->parent) 1379 return (AE_OK); 1380 1381 /* If this is not a valid device type (e.g., a method), skip it. */ 1382 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1383 return (AE_OK); 1384 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1385 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1386 return (AE_OK); 1387 1388 /* 1389 * Call the user function with the current device. If it is unchanged 1390 * afterwards, return. Otherwise, we update the handle to the new dev. 1391 */ 1392 old_dev = acpi_get_device(h); 1393 dev = old_dev; 1394 status = ctx->user_fn(h, &dev, level, ctx->arg); 1395 if (ACPI_FAILURE(status) || old_dev == dev) 1396 return (status); 1397 1398 /* Remove the old child and its connection to the handle. */ 1399 if (old_dev != NULL) { 1400 device_delete_child(device_get_parent(old_dev), old_dev); 1401 AcpiDetachData(h, acpi_fake_objhandler); 1402 } 1403 1404 /* Recreate the handle association if the user created a device. */ 1405 if (dev != NULL) 1406 AcpiAttachData(h, acpi_fake_objhandler, dev); 1407 1408 return (AE_OK); 1409 } 1410 1411 static ACPI_STATUS 1412 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1413 acpi_scan_cb_t user_fn, void *arg) 1414 { 1415 ACPI_HANDLE h; 1416 struct acpi_device_scan_ctx ctx; 1417 1418 if (acpi_disabled("children")) 1419 return (AE_OK); 1420 1421 if (dev == NULL) 1422 h = ACPI_ROOT_OBJECT; 1423 else if ((h = acpi_get_handle(dev)) == NULL) 1424 return (AE_BAD_PARAMETER); 1425 ctx.user_fn = user_fn; 1426 ctx.arg = arg; 1427 ctx.parent = h; 1428 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1429 acpi_device_scan_cb, NULL, &ctx, NULL)); 1430 } 1431 1432 /* 1433 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1434 * device power states since it's close enough to ACPI. 1435 */ 1436 static int 1437 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1438 { 1439 ACPI_HANDLE h; 1440 ACPI_STATUS status; 1441 int error; 1442 1443 error = 0; 1444 h = acpi_get_handle(child); 1445 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1446 return (EINVAL); 1447 if (h == NULL) 1448 return (0); 1449 1450 /* Ignore errors if the power methods aren't present. */ 1451 status = acpi_pwr_switch_consumer(h, state); 1452 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1453 && status != AE_BAD_PARAMETER) 1454 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1455 state, acpi_name(h), AcpiFormatException(status)); 1456 1457 return (error); 1458 } 1459 1460 static int 1461 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1462 { 1463 int result, cid_count, i; 1464 uint32_t lid, cids[8]; 1465 1466 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1467 1468 /* 1469 * ISA-style drivers attached to ACPI may persist and 1470 * probe manually if we return ENOENT. We never want 1471 * that to happen, so don't ever return it. 1472 */ 1473 result = ENXIO; 1474 1475 /* Scan the supplied IDs for a match */ 1476 lid = acpi_isa_get_logicalid(child); 1477 cid_count = acpi_isa_get_compatid(child, cids, 8); 1478 while (ids && ids->ip_id) { 1479 if (lid == ids->ip_id) { 1480 result = 0; 1481 goto out; 1482 } 1483 for (i = 0; i < cid_count; i++) { 1484 if (cids[i] == ids->ip_id) { 1485 result = 0; 1486 goto out; 1487 } 1488 } 1489 ids++; 1490 } 1491 1492 out: 1493 if (result == 0 && ids->ip_desc) 1494 device_set_desc(child, ids->ip_desc); 1495 1496 return_VALUE (result); 1497 } 1498 1499 /* 1500 * Look for a MCFG table. If it is present, use the settings for 1501 * domain (segment) 0 to setup PCI config space access via the memory 1502 * map. 1503 */ 1504 static void 1505 acpi_enable_pcie(void) 1506 { 1507 ACPI_TABLE_HEADER *hdr; 1508 ACPI_MCFG_ALLOCATION *alloc, *end; 1509 ACPI_STATUS status; 1510 1511 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr); 1512 if (ACPI_FAILURE(status)) 1513 return; 1514 1515 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length); 1516 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1); 1517 while (alloc < end) { 1518 if (alloc->PciSegment == 0) { 1519 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber, 1520 alloc->EndBusNumber); 1521 return; 1522 } 1523 alloc++; 1524 } 1525 } 1526 1527 /* 1528 * Scan all of the ACPI namespace and attach child devices. 1529 * 1530 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1531 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1532 * However, in violation of the spec, some systems place their PCI link 1533 * devices in \, so we have to walk the whole namespace. We check the 1534 * type of namespace nodes, so this should be ok. 1535 */ 1536 static void 1537 acpi_probe_children(device_t bus) 1538 { 1539 1540 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1541 1542 /* 1543 * Scan the namespace and insert placeholders for all the devices that 1544 * we find. We also probe/attach any early devices. 1545 * 1546 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1547 * we want to create nodes for all devices, not just those that are 1548 * currently present. (This assumes that we don't want to create/remove 1549 * devices as they appear, which might be smarter.) 1550 */ 1551 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1552 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, 1553 acpi_probe_child, NULL, bus, NULL); 1554 1555 /* Pre-allocate resources for our rman from any sysresource devices. */ 1556 acpi_sysres_alloc(bus); 1557 /* Create any static children by calling device identify methods. */ 1558 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1559 bus_generic_probe(bus); 1560 1561 /* Probe/attach all children, created staticly and from the namespace. */ 1562 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1563 bus_generic_attach(bus); 1564 1565 /* 1566 * Some of these children may have attached others as part of their attach 1567 * process (eg. the root PCI bus driver), so rescan. 1568 */ 1569 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1570 bus_generic_attach(bus); 1571 1572 /* Attach wake sysctls. */ 1573 acpi_wake_sysctl_walk(bus); 1574 1575 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1576 return_VOID; 1577 } 1578 1579 /* 1580 * Determine the probe order for a given device. 1581 */ 1582 static void 1583 acpi_probe_order(ACPI_HANDLE handle, int *order) 1584 { 1585 ACPI_OBJECT_TYPE type; 1586 1587 /* 1588 * 1. I/O port and memory system resource holders 1589 * 2. Embedded controllers (to handle early accesses) 1590 * 3. PCI Link Devices 1591 * 100000. CPUs 1592 */ 1593 AcpiGetType(handle, &type); 1594 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1595 *order = 1; 1596 else if (acpi_MatchHid(handle, "PNP0C09")) 1597 *order = 2; 1598 else if (acpi_MatchHid(handle, "PNP0C0F")) 1599 *order = 3; 1600 else if (type == ACPI_TYPE_PROCESSOR) 1601 *order = 100000; 1602 } 1603 1604 /* 1605 * Evaluate a child device and determine whether we might attach a device to 1606 * it. 1607 */ 1608 static ACPI_STATUS 1609 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1610 { 1611 struct acpi_prw_data prw; 1612 ACPI_OBJECT_TYPE type; 1613 ACPI_HANDLE h; 1614 device_t bus, child; 1615 int order; 1616 char *handle_str; 1617 1618 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1619 1620 if (acpi_disabled("children")) 1621 return_ACPI_STATUS (AE_OK); 1622 1623 /* Skip this device if we think we'll have trouble with it. */ 1624 if (acpi_avoid(handle)) 1625 return_ACPI_STATUS (AE_OK); 1626 1627 bus = (device_t)context; 1628 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1629 handle_str = acpi_name(handle); 1630 switch (type) { 1631 case ACPI_TYPE_DEVICE: 1632 /* 1633 * Since we scan from \, be sure to skip system scope objects. 1634 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around 1635 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run 1636 * during the intialization and \_TZ_ is to support Notify() on it. 1637 */ 1638 if (strcmp(handle_str, "\\_SB_") == 0 || 1639 strcmp(handle_str, "\\_TZ_") == 0) 1640 break; 1641 1642 if (acpi_parse_prw(handle, &prw) == 0) 1643 AcpiSetupGpeForWake(handle, prw.gpe_handle, prw.gpe_bit); 1644 1645 /* FALLTHROUGH */ 1646 case ACPI_TYPE_PROCESSOR: 1647 case ACPI_TYPE_THERMAL: 1648 case ACPI_TYPE_POWER: 1649 /* 1650 * Create a placeholder device for this node. Sort the 1651 * placeholder so that the probe/attach passes will run 1652 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1653 * are reserved for special objects (i.e., system 1654 * resources). CPU devices have a very high order to 1655 * ensure they are probed after other devices. 1656 */ 1657 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1658 order = level * 10 + 100; 1659 acpi_probe_order(handle, &order); 1660 child = BUS_ADD_CHILD(bus, bus, order, NULL, -1); 1661 if (child == NULL) 1662 break; 1663 1664 /* Associate the handle with the device_t and vice versa. */ 1665 acpi_set_handle(child, handle); 1666 AcpiAttachData(handle, acpi_fake_objhandler, child); 1667 1668 /* 1669 * Check that the device is present. If it's not present, 1670 * leave it disabled (so that we have a device_t attached to 1671 * the handle, but we don't probe it). 1672 * 1673 * XXX PCI link devices sometimes report "present" but not 1674 * "functional" (i.e. if disabled). Go ahead and probe them 1675 * anyway since we may enable them later. 1676 */ 1677 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1678 /* Never disable PCI link devices. */ 1679 if (acpi_MatchHid(handle, "PNP0C0F")) 1680 break; 1681 /* 1682 * Docking stations should remain enabled since the system 1683 * may be undocked at boot. 1684 */ 1685 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1686 break; 1687 1688 device_disable(child); 1689 break; 1690 } 1691 1692 /* 1693 * Get the device's resource settings and attach them. 1694 * Note that if the device has _PRS but no _CRS, we need 1695 * to decide when it's appropriate to try to configure the 1696 * device. Ignore the return value here; it's OK for the 1697 * device not to have any resources. 1698 */ 1699 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1700 break; 1701 } 1702 } 1703 1704 return_ACPI_STATUS (AE_OK); 1705 } 1706 1707 /* 1708 * AcpiAttachData() requires an object handler but never uses it. This is a 1709 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1710 */ 1711 void 1712 acpi_fake_objhandler(ACPI_HANDLE h, void *data) 1713 { 1714 } 1715 1716 static void 1717 acpi_shutdown_final(void *arg, int howto) 1718 { 1719 struct acpi_softc *sc; 1720 ACPI_STATUS status; 1721 1722 /* 1723 * XXX Shutdown code should only run on the BSP (cpuid 0). 1724 * Some chipsets do not power off the system correctly if called from 1725 * an AP. 1726 */ 1727 sc = arg; 1728 if ((howto & RB_POWEROFF) != 0) { 1729 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1730 if (ACPI_FAILURE(status)) { 1731 kprintf("AcpiEnterSleepStatePrep failed - %s\n", 1732 AcpiFormatException(status)); 1733 return; 1734 } 1735 kprintf("Powering system off using ACPI\n"); 1736 ACPI_DISABLE_IRQS(); 1737 status = AcpiEnterSleepState(ACPI_STATE_S5); 1738 if (ACPI_FAILURE(status)) { 1739 kprintf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1740 } else { 1741 DELAY(1000000); 1742 kprintf("ACPI power-off failed - timeout\n"); 1743 } 1744 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) { 1745 /* Reboot using the reset register. */ 1746 status = AcpiReset(); 1747 if (ACPI_FAILURE(status)) { 1748 if (status != AE_NOT_EXIST) 1749 kprintf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1750 } else { 1751 DELAY(1000000); 1752 kprintf("ACPI reset failed - timeout\n"); 1753 } 1754 } else if (sc->acpi_do_disable && panicstr == NULL) { 1755 /* 1756 * Only disable ACPI if the user requested. On some systems, writing 1757 * the disable value to SMI_CMD hangs the system. 1758 */ 1759 kprintf("Shutting down ACPI\n"); 1760 AcpiTerminate(); 1761 } 1762 } 1763 1764 static void 1765 acpi_enable_fixed_events(struct acpi_softc *sc) 1766 { 1767 static int first_time = 1; 1768 1769 /* Enable and clear fixed events and install handlers. */ 1770 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1771 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1772 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1773 acpi_event_power_button_sleep, sc); 1774 if (first_time) 1775 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1776 } 1777 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1778 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1779 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1780 acpi_event_sleep_button_sleep, sc); 1781 if (first_time) 1782 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1783 } 1784 1785 first_time = 0; 1786 } 1787 1788 /* 1789 * Returns true if the device is actually present and should 1790 * be attached to. This requires the present, enabled, UI-visible 1791 * and diagnostics-passed bits to be set. 1792 */ 1793 BOOLEAN 1794 acpi_DeviceIsPresent(device_t dev) 1795 { 1796 ACPI_DEVICE_INFO *devinfo; 1797 ACPI_HANDLE h; 1798 ACPI_STATUS error; 1799 int ret; 1800 1801 ret = FALSE; 1802 if ((h = acpi_get_handle(dev)) == NULL) 1803 return (FALSE); 1804 error = AcpiGetObjectInfo(h, &devinfo); 1805 if (ACPI_FAILURE(error)) 1806 return (FALSE); 1807 1808 /* If no _STA method, must be present */ 1809 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1810 ret = TRUE; 1811 1812 /* Return true for 'present' and 'functioning' */ 1813 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1814 ret = TRUE; 1815 1816 AcpiOsFree(devinfo); 1817 return (ret); 1818 } 1819 1820 /* 1821 * Returns true if the battery is actually present and inserted. 1822 */ 1823 BOOLEAN 1824 acpi_BatteryIsPresent(device_t dev) 1825 { 1826 ACPI_DEVICE_INFO *devinfo; 1827 ACPI_HANDLE h; 1828 ACPI_STATUS error; 1829 int ret; 1830 1831 ret = FALSE; 1832 if ((h = acpi_get_handle(dev)) == NULL) 1833 return (FALSE); 1834 error = AcpiGetObjectInfo(h, &devinfo); 1835 if (ACPI_FAILURE(error)) 1836 return (FALSE); 1837 1838 /* If no _STA method, must be present */ 1839 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1840 ret = TRUE; 1841 1842 /* Return true for 'present', 'battery present', and 'functioning' */ 1843 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1844 ret = TRUE; 1845 1846 AcpiOsFree(devinfo); 1847 return (ret); 1848 } 1849 1850 /* 1851 * Match a HID string against a handle 1852 */ 1853 BOOLEAN 1854 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1855 { 1856 ACPI_DEVICE_INFO *devinfo; 1857 ACPI_STATUS error; 1858 int ret, i; 1859 1860 ret = FALSE; 1861 if (hid == NULL || h == NULL) 1862 return (ret); 1863 error = AcpiGetObjectInfo(h, &devinfo); 1864 if (ACPI_FAILURE(error)) 1865 return (ret); 1866 1867 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1868 strcmp(hid, devinfo->HardwareId.String) == 0) 1869 ret = TRUE; 1870 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1871 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) { 1872 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) { 1873 ret = TRUE; 1874 break; 1875 } 1876 } 1877 } 1878 1879 AcpiOsFree(devinfo); 1880 return (ret); 1881 } 1882 1883 /* 1884 * Return the handle of a named object within our scope, ie. that of (parent) 1885 * or one if its parents. 1886 */ 1887 ACPI_STATUS 1888 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1889 { 1890 ACPI_HANDLE r; 1891 ACPI_STATUS status; 1892 1893 /* Walk back up the tree to the root */ 1894 for (;;) { 1895 status = AcpiGetHandle(parent, path, &r); 1896 if (ACPI_SUCCESS(status)) { 1897 *result = r; 1898 return (AE_OK); 1899 } 1900 /* XXX Return error here? */ 1901 if (status != AE_NOT_FOUND) 1902 return (AE_OK); 1903 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1904 return (AE_NOT_FOUND); 1905 parent = r; 1906 } 1907 } 1908 1909 /* 1910 * Allocate a buffer with a preset data size. 1911 */ 1912 ACPI_BUFFER * 1913 acpi_AllocBuffer(int size) 1914 { 1915 ACPI_BUFFER *buf; 1916 1917 if ((buf = kmalloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1918 return (NULL); 1919 buf->Length = size; 1920 buf->Pointer = (void *)(buf + 1); 1921 return (buf); 1922 } 1923 1924 ACPI_STATUS 1925 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1926 { 1927 ACPI_OBJECT arg1; 1928 ACPI_OBJECT_LIST args; 1929 1930 arg1.Type = ACPI_TYPE_INTEGER; 1931 arg1.Integer.Value = number; 1932 args.Count = 1; 1933 args.Pointer = &arg1; 1934 1935 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1936 } 1937 1938 /* 1939 * Evaluate a path that should return an integer. 1940 */ 1941 ACPI_STATUS 1942 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1943 { 1944 ACPI_STATUS status; 1945 ACPI_BUFFER buf; 1946 ACPI_OBJECT param; 1947 1948 if (handle == NULL) 1949 handle = ACPI_ROOT_OBJECT; 1950 1951 /* 1952 * Assume that what we've been pointed at is an Integer object, or 1953 * a method that will return an Integer. 1954 */ 1955 buf.Pointer = ¶m; 1956 buf.Length = sizeof(param); 1957 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1958 if (ACPI_SUCCESS(status)) { 1959 if (param.Type == ACPI_TYPE_INTEGER) 1960 *number = param.Integer.Value; 1961 else 1962 status = AE_TYPE; 1963 } 1964 1965 /* 1966 * In some applications, a method that's expected to return an Integer 1967 * may instead return a Buffer (probably to simplify some internal 1968 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1969 * convert it into an Integer as best we can. 1970 * 1971 * This is a hack. 1972 */ 1973 if (status == AE_BUFFER_OVERFLOW) { 1974 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1975 status = AE_NO_MEMORY; 1976 } else { 1977 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1978 if (ACPI_SUCCESS(status)) 1979 status = acpi_ConvertBufferToInteger(&buf, number); 1980 AcpiOsFree(buf.Pointer); 1981 } 1982 } 1983 return (status); 1984 } 1985 1986 ACPI_STATUS 1987 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1988 { 1989 ACPI_OBJECT *p; 1990 UINT8 *val; 1991 int i; 1992 1993 p = (ACPI_OBJECT *)bufp->Pointer; 1994 if (p->Type == ACPI_TYPE_INTEGER) { 1995 *number = p->Integer.Value; 1996 return (AE_OK); 1997 } 1998 if (p->Type != ACPI_TYPE_BUFFER) 1999 return (AE_TYPE); 2000 if (p->Buffer.Length > sizeof(int)) 2001 return (AE_BAD_DATA); 2002 2003 *number = 0; 2004 val = p->Buffer.Pointer; 2005 for (i = 0; i < p->Buffer.Length; i++) 2006 *number += val[i] << (i * 8); 2007 return (AE_OK); 2008 } 2009 2010 /* 2011 * Iterate over the elements of an a package object, calling the supplied 2012 * function for each element. 2013 * 2014 * XXX possible enhancement might be to abort traversal on error. 2015 */ 2016 ACPI_STATUS 2017 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 2018 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 2019 { 2020 ACPI_OBJECT *comp; 2021 int i; 2022 2023 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 2024 return (AE_BAD_PARAMETER); 2025 2026 /* Iterate over components */ 2027 i = 0; 2028 comp = pkg->Package.Elements; 2029 for (; i < pkg->Package.Count; i++, comp++) 2030 func(comp, arg); 2031 2032 return (AE_OK); 2033 } 2034 2035 /* 2036 * Find the (index)th resource object in a set. 2037 */ 2038 ACPI_STATUS 2039 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2040 { 2041 ACPI_RESOURCE *rp; 2042 int i; 2043 2044 rp = (ACPI_RESOURCE *)buf->Pointer; 2045 i = index; 2046 while (i-- > 0) { 2047 /* Range check */ 2048 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2049 return (AE_BAD_PARAMETER); 2050 2051 /* Check for terminator */ 2052 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2053 return (AE_NOT_FOUND); 2054 rp = ACPI_NEXT_RESOURCE(rp); 2055 } 2056 if (resp != NULL) 2057 *resp = rp; 2058 2059 return (AE_OK); 2060 } 2061 2062 /* 2063 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2064 * 2065 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2066 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2067 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2068 * resources. 2069 */ 2070 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2071 2072 ACPI_STATUS 2073 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2074 { 2075 ACPI_RESOURCE *rp; 2076 void *newp; 2077 2078 /* Initialise the buffer if necessary. */ 2079 if (buf->Pointer == NULL) { 2080 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2081 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2082 return (AE_NO_MEMORY); 2083 rp = (ACPI_RESOURCE *)buf->Pointer; 2084 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2085 rp->Length = 0; 2086 } 2087 if (res == NULL) 2088 return (AE_OK); 2089 2090 /* 2091 * Scan the current buffer looking for the terminator. 2092 * This will either find the terminator or hit the end 2093 * of the buffer and return an error. 2094 */ 2095 rp = (ACPI_RESOURCE *)buf->Pointer; 2096 for (;;) { 2097 /* Range check, don't go outside the buffer */ 2098 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2099 return (AE_BAD_PARAMETER); 2100 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2101 break; 2102 rp = ACPI_NEXT_RESOURCE(rp); 2103 } 2104 2105 /* 2106 * Check the size of the buffer and expand if required. 2107 * 2108 * Required size is: 2109 * size of existing resources before terminator + 2110 * size of new resource and header + 2111 * size of terminator. 2112 * 2113 * Note that this loop should really only run once, unless 2114 * for some reason we are stuffing a *really* huge resource. 2115 */ 2116 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2117 res->Length + ACPI_RS_SIZE_NO_DATA + 2118 ACPI_RS_SIZE_MIN) >= buf->Length) { 2119 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2120 return (AE_NO_MEMORY); 2121 bcopy(buf->Pointer, newp, buf->Length); 2122 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2123 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2124 AcpiOsFree(buf->Pointer); 2125 buf->Pointer = newp; 2126 buf->Length += buf->Length; 2127 } 2128 2129 /* Insert the new resource. */ 2130 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2131 2132 /* And add the terminator. */ 2133 rp = ACPI_NEXT_RESOURCE(rp); 2134 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2135 rp->Length = 0; 2136 2137 return (AE_OK); 2138 } 2139 2140 /* 2141 * Set interrupt model. 2142 */ 2143 ACPI_STATUS 2144 acpi_SetIntrModel(int model) 2145 { 2146 2147 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2148 } 2149 2150 /* 2151 * DEPRECATED. This interface has serious deficiencies and will be 2152 * removed. 2153 * 2154 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2155 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2156 */ 2157 ACPI_STATUS 2158 acpi_SetSleepState(struct acpi_softc *sc, int state) 2159 { 2160 static int once; 2161 2162 if (!once) { 2163 kprintf( 2164 "warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2165 once = 1; 2166 } 2167 return (acpi_EnterSleepState(sc, state)); 2168 } 2169 2170 static void 2171 acpi_sleep_force(void *arg) 2172 { 2173 struct acpi_softc *sc; 2174 2175 kprintf("acpi: suspend request timed out, forcing sleep now\n"); 2176 sc = arg; 2177 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2178 kprintf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2179 } 2180 2181 /* 2182 * Request that the system enter the given suspend state. All /dev/apm 2183 * devices and devd(8) will be notified. Userland then has a chance to 2184 * save state and acknowledge the request. The system sleeps once all 2185 * acks are in. 2186 */ 2187 int 2188 acpi_ReqSleepState(struct acpi_softc *sc, int state) 2189 { 2190 #ifdef notyet 2191 struct apm_clone_data *clone; 2192 #endif 2193 2194 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2195 return (EINVAL); 2196 2197 /* S5 (soft-off) should be entered directly with no waiting. */ 2198 if (state == ACPI_STATE_S5) { 2199 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2200 return (0); 2201 else 2202 return (ENXIO); 2203 } 2204 2205 #if !defined(__i386__) 2206 /* This platform does not support acpi suspend/resume. */ 2207 return (EOPNOTSUPP); 2208 #endif 2209 2210 /* If a suspend request is already in progress, just return. */ 2211 ACPI_LOCK(acpi); 2212 if (sc->acpi_next_sstate != 0) { 2213 ACPI_UNLOCK(acpi); 2214 return (0); 2215 } 2216 2217 /* Record the pending state and notify all apm devices. */ 2218 sc->acpi_next_sstate = state; 2219 #if 0 2220 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2221 clone->notify_status = APM_EV_NONE; 2222 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2223 KNOTE(&clone->sel_read.si_note, 0); 2224 } 2225 } 2226 #endif 2227 2228 /* If devd(8) is not running, immediately enter the sleep state. */ 2229 if (devctl_process_running() == FALSE) { 2230 ACPI_UNLOCK(acpi); 2231 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2232 return (0); 2233 } else { 2234 return (ENXIO); 2235 } 2236 } 2237 2238 /* Now notify devd(8) also. */ 2239 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2240 2241 /* 2242 * Set a timeout to fire if userland doesn't ack the suspend request 2243 * in time. This way we still eventually go to sleep if we were 2244 * overheating or running low on battery, even if userland is hung. 2245 * We cancel this timeout once all userland acks are in or the 2246 * suspend request is aborted. 2247 */ 2248 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2249 ACPI_UNLOCK(acpi); 2250 return (0); 2251 } 2252 2253 /* 2254 * Acknowledge (or reject) a pending sleep state. The caller has 2255 * prepared for suspend and is now ready for it to proceed. If the 2256 * error argument is non-zero, it indicates suspend should be cancelled 2257 * and gives an errno value describing why. Once all votes are in, 2258 * we suspend the system. 2259 */ 2260 int 2261 acpi_AckSleepState(struct apm_clone_data *clone, int error) 2262 { 2263 struct acpi_softc *sc; 2264 int ret, sleeping; 2265 2266 #if !defined(__i386__) 2267 /* This platform does not support acpi suspend/resume. */ 2268 return (EOPNOTSUPP); 2269 #endif 2270 2271 /* If no pending sleep state, return an error. */ 2272 ACPI_LOCK(acpi); 2273 sc = clone->acpi_sc; 2274 if (sc->acpi_next_sstate == 0) { 2275 ACPI_UNLOCK(acpi); 2276 return (ENXIO); 2277 } 2278 2279 /* Caller wants to abort suspend process. */ 2280 if (error) { 2281 sc->acpi_next_sstate = 0; 2282 callout_stop(&sc->susp_force_to); 2283 kprintf("acpi: listener on %s cancelled the pending suspend\n", 2284 devtoname(clone->cdev)); 2285 ACPI_UNLOCK(acpi); 2286 return (0); 2287 } 2288 2289 /* 2290 * Mark this device as acking the suspend request. Then, walk through 2291 * all devices, seeing if they agree yet. We only count devices that 2292 * are writable since read-only devices couldn't ack the request. 2293 */ 2294 clone->notify_status = APM_EV_ACKED; 2295 sleeping = TRUE; 2296 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2297 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2298 clone->notify_status != APM_EV_ACKED) { 2299 sleeping = FALSE; 2300 break; 2301 } 2302 } 2303 2304 /* If all devices have voted "yes", we will suspend now. */ 2305 if (sleeping) 2306 callout_stop(&sc->susp_force_to); 2307 ACPI_UNLOCK(acpi); 2308 ret = 0; 2309 if (sleeping) { 2310 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2311 ret = ENODEV; 2312 } 2313 2314 return (ret); 2315 } 2316 2317 static void 2318 acpi_sleep_enable(void *arg) 2319 { 2320 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2321 } 2322 2323 enum acpi_sleep_state { 2324 ACPI_SS_NONE, 2325 ACPI_SS_GPE_SET, 2326 ACPI_SS_DEV_SUSPEND, 2327 ACPI_SS_SLP_PREP, 2328 ACPI_SS_SLEPT, 2329 }; 2330 2331 /* 2332 * Enter the desired system sleep state. 2333 * 2334 * Currently we support S1-S5 but S4 is only S4BIOS 2335 */ 2336 static ACPI_STATUS 2337 acpi_EnterSleepState(struct acpi_softc *sc, int state) 2338 { 2339 ACPI_STATUS status; 2340 UINT8 TypeA; 2341 UINT8 TypeB; 2342 enum acpi_sleep_state slp_state; 2343 2344 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2345 2346 /* Re-entry once we're suspending is not allowed. */ 2347 status = AE_OK; 2348 ACPI_LOCK(acpi); 2349 if (sc->acpi_sleep_disabled) { 2350 ACPI_UNLOCK(acpi); 2351 kprintf("acpi: suspend request ignored (not ready yet)\n"); 2352 return (AE_ERROR); 2353 } 2354 sc->acpi_sleep_disabled = 1; 2355 ACPI_UNLOCK(acpi); 2356 2357 /* 2358 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2359 * drivers need this. 2360 */ 2361 //get_mplock(); 2362 slp_state = ACPI_SS_NONE; 2363 switch (state) { 2364 case ACPI_STATE_S1: 2365 case ACPI_STATE_S2: 2366 case ACPI_STATE_S3: 2367 case ACPI_STATE_S4: 2368 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2369 if (status == AE_NOT_FOUND) { 2370 device_printf(sc->acpi_dev, 2371 "Sleep state S%d not supported by BIOS\n", state); 2372 break; 2373 } else if (ACPI_FAILURE(status)) { 2374 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2375 AcpiFormatException(status)); 2376 break; 2377 } 2378 2379 sc->acpi_sstate = state; 2380 2381 /* Enable any GPEs as appropriate and requested by the user. */ 2382 acpi_wake_prep_walk(state); 2383 slp_state = ACPI_SS_GPE_SET; 2384 2385 /* 2386 * Inform all devices that we are going to sleep. If at least one 2387 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2388 * 2389 * XXX Note that a better two-pass approach with a 'veto' pass 2390 * followed by a "real thing" pass would be better, but the current 2391 * bus interface does not provide for this. 2392 */ 2393 if (DEVICE_SUSPEND(root_bus) != 0) { 2394 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2395 break; 2396 } 2397 slp_state = ACPI_SS_DEV_SUSPEND; 2398 2399 /* If testing device suspend only, back out of everything here. */ 2400 if (acpi_susp_bounce) 2401 break; 2402 2403 status = AcpiEnterSleepStatePrep(state); 2404 if (ACPI_FAILURE(status)) { 2405 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2406 AcpiFormatException(status)); 2407 break; 2408 } 2409 slp_state = ACPI_SS_SLP_PREP; 2410 2411 if (sc->acpi_sleep_delay > 0) 2412 DELAY(sc->acpi_sleep_delay * 1000000); 2413 2414 if (state != ACPI_STATE_S1) { 2415 acpi_sleep_machdep(sc, state); 2416 2417 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2418 if (state == ACPI_STATE_S4) 2419 AcpiEnable(); 2420 } else { 2421 ACPI_DISABLE_IRQS(); 2422 status = AcpiEnterSleepState(state); 2423 if (ACPI_FAILURE(status)) { 2424 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2425 AcpiFormatException(status)); 2426 break; 2427 } 2428 } 2429 slp_state = ACPI_SS_SLEPT; 2430 break; 2431 case ACPI_STATE_S5: 2432 /* 2433 * Shut down cleanly and power off. This will call us back through the 2434 * shutdown handlers. 2435 */ 2436 shutdown_nice(RB_POWEROFF); 2437 break; 2438 case ACPI_STATE_S0: 2439 default: 2440 status = AE_BAD_PARAMETER; 2441 break; 2442 } 2443 2444 /* 2445 * Back out state according to how far along we got in the suspend 2446 * process. This handles both the error and success cases. 2447 */ 2448 sc->acpi_next_sstate = 0; 2449 if (slp_state >= ACPI_SS_GPE_SET) { 2450 acpi_wake_prep_walk(state); 2451 sc->acpi_sstate = ACPI_STATE_S0; 2452 } 2453 if (slp_state >= ACPI_SS_SLP_PREP) 2454 AcpiLeaveSleepState(state); 2455 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2456 DEVICE_RESUME(root_bus); 2457 if (slp_state >= ACPI_SS_SLEPT) 2458 acpi_enable_fixed_events(sc); 2459 2460 /* Allow another sleep request after a while. */ 2461 /* XXX: needs timeout */ 2462 if (state != ACPI_STATE_S5) 2463 acpi_sleep_enable(sc); 2464 2465 /* Run /etc/rc.resume after we are back. */ 2466 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2467 2468 //rel_mplock(); 2469 return_ACPI_STATUS (status); 2470 } 2471 2472 /* Enable or disable the device's GPE. */ 2473 int 2474 acpi_wake_set_enable(device_t dev, int enable) 2475 { 2476 struct acpi_prw_data prw; 2477 ACPI_STATUS status; 2478 int flags; 2479 2480 /* Make sure the device supports waking the system and get the GPE. */ 2481 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2482 return (ENXIO); 2483 2484 flags = acpi_get_flags(dev); 2485 if (enable) { 2486 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2487 ACPI_GPE_ENABLE); 2488 if (ACPI_FAILURE(status)) { 2489 device_printf(dev, "enable wake failed\n"); 2490 return (ENXIO); 2491 } 2492 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2493 } else { 2494 status = AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, 2495 ACPI_GPE_DISABLE); 2496 if (ACPI_FAILURE(status)) { 2497 device_printf(dev, "disable wake failed\n"); 2498 return (ENXIO); 2499 } 2500 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2501 } 2502 2503 return (0); 2504 } 2505 2506 static int 2507 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2508 { 2509 struct acpi_prw_data prw; 2510 device_t dev; 2511 2512 /* Check that this is a wake-capable device and get its GPE. */ 2513 if (acpi_parse_prw(handle, &prw) != 0) 2514 return (ENXIO); 2515 dev = acpi_get_device(handle); 2516 2517 /* 2518 * The destination sleep state must be less than (i.e., higher power) 2519 * or equal to the value specified by _PRW. If this GPE cannot be 2520 * enabled for the next sleep state, then disable it. If it can and 2521 * the user requested it be enabled, turn on any required power resources 2522 * and set _PSW. 2523 */ 2524 if (sstate > prw.lowest_wake) { 2525 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE); 2526 if (bootverbose) 2527 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2528 acpi_name(handle), sstate); 2529 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2530 acpi_pwr_wake_enable(handle, 1); 2531 acpi_SetInteger(handle, "_PSW", 1); 2532 if (bootverbose) 2533 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2534 acpi_name(handle), sstate); 2535 } 2536 2537 return (0); 2538 } 2539 2540 static int 2541 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2542 { 2543 struct acpi_prw_data prw; 2544 device_t dev; 2545 2546 /* 2547 * Check that this is a wake-capable device and get its GPE. Return 2548 * now if the user didn't enable this device for wake. 2549 */ 2550 if (acpi_parse_prw(handle, &prw) != 0) 2551 return (ENXIO); 2552 dev = acpi_get_device(handle); 2553 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2554 return (0); 2555 2556 /* 2557 * If this GPE couldn't be enabled for the previous sleep state, it was 2558 * disabled before going to sleep so re-enable it. If it was enabled, 2559 * clear _PSW and turn off any power resources it used. 2560 */ 2561 if (sstate > prw.lowest_wake) { 2562 AcpiSetGpeWakeMask(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE); 2563 if (bootverbose) 2564 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2565 } else { 2566 acpi_SetInteger(handle, "_PSW", 0); 2567 acpi_pwr_wake_enable(handle, 0); 2568 if (bootverbose) 2569 device_printf(dev, "run_prep cleaned up for %s\n", 2570 acpi_name(handle)); 2571 } 2572 2573 return (0); 2574 } 2575 2576 static ACPI_STATUS 2577 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2578 { 2579 int sstate; 2580 2581 /* If suspending, run the sleep prep function, otherwise wake. */ 2582 sstate = *(int *)context; 2583 if (AcpiGbl_SystemAwakeAndRunning) 2584 acpi_wake_sleep_prep(handle, sstate); 2585 else 2586 acpi_wake_run_prep(handle, sstate); 2587 return (AE_OK); 2588 } 2589 2590 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2591 static int 2592 acpi_wake_prep_walk(int sstate) 2593 { 2594 ACPI_HANDLE sb_handle; 2595 2596 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) { 2597 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2598 acpi_wake_prep, NULL, &sstate, NULL); 2599 } 2600 return (0); 2601 } 2602 2603 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2604 static int 2605 acpi_wake_sysctl_walk(device_t dev) 2606 { 2607 #ifdef notyet 2608 int error, i, numdevs; 2609 device_t *devlist; 2610 device_t child; 2611 ACPI_STATUS status; 2612 2613 error = device_get_children(dev, &devlist, &numdevs); 2614 if (error != 0 || numdevs == 0) { 2615 if (numdevs == 0) 2616 kfree(devlist, M_TEMP); 2617 return (error); 2618 } 2619 for (i = 0; i < numdevs; i++) { 2620 child = devlist[i]; 2621 acpi_wake_sysctl_walk(child); 2622 if (!device_is_attached(child)) 2623 continue; 2624 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2625 if (ACPI_SUCCESS(status)) { 2626 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2627 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2628 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2629 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2630 } 2631 } 2632 kfree(devlist, M_TEMP); 2633 #endif 2634 2635 return (0); 2636 } 2637 2638 #ifdef notyet 2639 /* Enable or disable wake from userland. */ 2640 static int 2641 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2642 { 2643 int enable, error; 2644 device_t dev; 2645 2646 dev = (device_t)arg1; 2647 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2648 2649 error = sysctl_handle_int(oidp, &enable, 0, req); 2650 if (error != 0 || req->newptr == NULL) 2651 return (error); 2652 if (enable != 0 && enable != 1) 2653 return (EINVAL); 2654 2655 return (acpi_wake_set_enable(dev, enable)); 2656 } 2657 #endif 2658 2659 /* Parse a device's _PRW into a structure. */ 2660 int 2661 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2662 { 2663 ACPI_STATUS status; 2664 ACPI_BUFFER prw_buffer; 2665 ACPI_OBJECT *res, *res2; 2666 int error, i, power_count; 2667 2668 if (h == NULL || prw == NULL) 2669 return (EINVAL); 2670 2671 /* 2672 * The _PRW object (7.2.9) is only required for devices that have the 2673 * ability to wake the system from a sleeping state. 2674 */ 2675 error = EINVAL; 2676 prw_buffer.Pointer = NULL; 2677 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2678 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2679 if (ACPI_FAILURE(status)) 2680 return (ENOENT); 2681 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2682 if (res == NULL) 2683 return (ENOENT); 2684 if (!ACPI_PKG_VALID(res, 2)) 2685 goto out; 2686 2687 /* 2688 * Element 1 of the _PRW object: 2689 * The lowest power system sleeping state that can be entered while still 2690 * providing wake functionality. The sleeping state being entered must 2691 * be less than (i.e., higher power) or equal to this value. 2692 */ 2693 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2694 goto out; 2695 2696 /* 2697 * Element 0 of the _PRW object: 2698 */ 2699 switch (res->Package.Elements[0].Type) { 2700 case ACPI_TYPE_INTEGER: 2701 /* 2702 * If the data type of this package element is numeric, then this 2703 * _PRW package element is the bit index in the GPEx_EN, in the 2704 * GPE blocks described in the FADT, of the enable bit that is 2705 * enabled for the wake event. 2706 */ 2707 prw->gpe_handle = NULL; 2708 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2709 error = 0; 2710 break; 2711 case ACPI_TYPE_PACKAGE: 2712 /* 2713 * If the data type of this package element is a package, then this 2714 * _PRW package element is itself a package containing two 2715 * elements. The first is an object reference to the GPE Block 2716 * device that contains the GPE that will be triggered by the wake 2717 * event. The second element is numeric and it contains the bit 2718 * index in the GPEx_EN, in the GPE Block referenced by the 2719 * first element in the package, of the enable bit that is enabled for 2720 * the wake event. 2721 * 2722 * For example, if this field is a package then it is of the form: 2723 * Package() {\_SB.PCI0.ISA.GPE, 2} 2724 */ 2725 res2 = &res->Package.Elements[0]; 2726 if (!ACPI_PKG_VALID(res2, 2)) 2727 goto out; 2728 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2729 if (prw->gpe_handle == NULL) 2730 goto out; 2731 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2732 goto out; 2733 error = 0; 2734 break; 2735 default: 2736 goto out; 2737 } 2738 2739 /* Elements 2 to N of the _PRW object are power resources. */ 2740 power_count = res->Package.Count - 2; 2741 if (power_count > ACPI_PRW_MAX_POWERRES) { 2742 kprintf("ACPI device %s has too many power resources\n", acpi_name(h)); 2743 power_count = 0; 2744 } 2745 prw->power_res_count = power_count; 2746 for (i = 0; i < power_count; i++) 2747 prw->power_res[i] = res->Package.Elements[i]; 2748 2749 out: 2750 if (prw_buffer.Pointer != NULL) 2751 AcpiOsFree(prw_buffer.Pointer); 2752 return (error); 2753 } 2754 2755 /* 2756 * ACPI Event Handlers 2757 */ 2758 2759 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2760 2761 static void 2762 acpi_system_eventhandler_sleep(void *arg, int state) 2763 { 2764 int ret; 2765 2766 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2767 2768 /* Check if button action is disabled. */ 2769 if (state == ACPI_S_STATES_MAX + 1) 2770 return; 2771 2772 /* Request that the system prepare to enter the given suspend state. */ 2773 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2774 if (ret != 0) 2775 kprintf("acpi: request to enter state S%d failed (err %d)\n", 2776 state, ret); 2777 2778 return_VOID; 2779 } 2780 2781 static void 2782 acpi_system_eventhandler_wakeup(void *arg, int state) 2783 { 2784 2785 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2786 2787 /* Currently, nothing to do for wakeup. */ 2788 2789 return_VOID; 2790 } 2791 2792 /* 2793 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2794 */ 2795 UINT32 2796 acpi_event_power_button_sleep(void *context) 2797 { 2798 struct acpi_softc *sc = (struct acpi_softc *)context; 2799 2800 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2801 2802 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2803 2804 return_VALUE (ACPI_INTERRUPT_HANDLED); 2805 } 2806 2807 UINT32 2808 acpi_event_power_button_wake(void *context) 2809 { 2810 struct acpi_softc *sc = (struct acpi_softc *)context; 2811 2812 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2813 2814 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2815 2816 return_VALUE (ACPI_INTERRUPT_HANDLED); 2817 } 2818 2819 UINT32 2820 acpi_event_sleep_button_sleep(void *context) 2821 { 2822 struct acpi_softc *sc = (struct acpi_softc *)context; 2823 2824 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2825 2826 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2827 2828 return_VALUE (ACPI_INTERRUPT_HANDLED); 2829 } 2830 2831 UINT32 2832 acpi_event_sleep_button_wake(void *context) 2833 { 2834 struct acpi_softc *sc = (struct acpi_softc *)context; 2835 2836 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2837 2838 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2839 2840 return_VALUE (ACPI_INTERRUPT_HANDLED); 2841 } 2842 2843 /* 2844 * XXX This static buffer is suboptimal. There is no locking so only 2845 * use this for single-threaded callers. 2846 */ 2847 char * 2848 acpi_name(ACPI_HANDLE handle) 2849 { 2850 ACPI_BUFFER buf; 2851 static char data[256]; 2852 2853 buf.Length = sizeof(data); 2854 buf.Pointer = data; 2855 2856 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2857 return (data); 2858 return ("(unknown)"); 2859 } 2860 2861 /* 2862 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2863 * parts of the namespace. 2864 */ 2865 int 2866 acpi_avoid(ACPI_HANDLE handle) 2867 { 2868 char *cp, *env, *np; 2869 int len; 2870 2871 np = acpi_name(handle); 2872 if (*np == '\\') 2873 np++; 2874 if ((env = kgetenv("debug.acpi.avoid")) == NULL) 2875 return (0); 2876 2877 /* Scan the avoid list checking for a match */ 2878 cp = env; 2879 for (;;) { 2880 while (*cp != 0 && isspace(*cp)) 2881 cp++; 2882 if (*cp == 0) 2883 break; 2884 len = 0; 2885 while (cp[len] != 0 && !isspace(cp[len])) 2886 len++; 2887 if (!strncmp(cp, np, len)) { 2888 kfreeenv(env); 2889 return(1); 2890 } 2891 cp += len; 2892 } 2893 kfreeenv(env); 2894 2895 return (0); 2896 } 2897 2898 /* 2899 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2900 */ 2901 int 2902 acpi_disabled(char *subsys) 2903 { 2904 char *cp, *env; 2905 int len; 2906 2907 if ((env = kgetenv("debug.acpi.disabled")) == NULL) 2908 return (0); 2909 if (strcmp(env, "all") == 0) { 2910 kfreeenv(env); 2911 return (1); 2912 } 2913 2914 /* Scan the disable list, checking for a match. */ 2915 cp = env; 2916 for (;;) { 2917 while (*cp != '\0' && isspace(*cp)) 2918 cp++; 2919 if (*cp == '\0') 2920 break; 2921 len = 0; 2922 while (cp[len] != '\0' && !isspace(cp[len])) 2923 len++; 2924 if (strncmp(cp, subsys, len) == 0) { 2925 kfreeenv(env); 2926 return (1); 2927 } 2928 cp += len; 2929 } 2930 kfreeenv(env); 2931 2932 return (0); 2933 } 2934 2935 /* 2936 * Debugging/bug-avoidance. Enable ACPI subsystem components. Most 2937 * components are enabled by default. The ones that are not have to be 2938 * enabled via debug.acpi.enabled. 2939 */ 2940 int 2941 acpi_enabled(char *subsys) 2942 { 2943 char *cp, *env; 2944 int len; 2945 2946 if ((env = kgetenv("debug.acpi.enabled")) == NULL) 2947 return (0); 2948 if (strcmp(env, "all") == 0) { 2949 kfreeenv(env); 2950 return (1); 2951 } 2952 2953 /* Scan the enable list, checking for a match. */ 2954 cp = env; 2955 for (;;) { 2956 while (*cp != '\0' && isspace(*cp)) 2957 cp++; 2958 if (*cp == '\0') 2959 break; 2960 len = 0; 2961 while (cp[len] != '\0' && !isspace(cp[len])) 2962 len++; 2963 if (strncmp(cp, subsys, len) == 0) { 2964 kfreeenv(env); 2965 return (1); 2966 } 2967 cp += len; 2968 } 2969 kfreeenv(env); 2970 2971 return (0); 2972 } 2973 2974 /* 2975 * Control interface. 2976 * 2977 * We multiplex ioctls for all participating ACPI devices here. Individual 2978 * drivers wanting to be accessible via /dev/acpi should use the 2979 * register/deregister interface to make their handlers visible. 2980 */ 2981 struct acpi_ioctl_hook 2982 { 2983 TAILQ_ENTRY(acpi_ioctl_hook) link; 2984 u_long cmd; 2985 acpi_ioctl_fn fn; 2986 void *arg; 2987 }; 2988 2989 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2990 static int acpi_ioctl_hooks_initted; 2991 2992 int 2993 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2994 { 2995 struct acpi_ioctl_hook *hp; 2996 2997 if ((hp = kmalloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2998 return (ENOMEM); 2999 hp->cmd = cmd; 3000 hp->fn = fn; 3001 hp->arg = arg; 3002 3003 ACPI_LOCK(acpi); 3004 if (acpi_ioctl_hooks_initted == 0) { 3005 TAILQ_INIT(&acpi_ioctl_hooks); 3006 acpi_ioctl_hooks_initted = 1; 3007 } 3008 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 3009 ACPI_UNLOCK(acpi); 3010 3011 return (0); 3012 } 3013 3014 void 3015 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 3016 { 3017 struct acpi_ioctl_hook *hp; 3018 3019 ACPI_LOCK(acpi); 3020 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 3021 if (hp->cmd == cmd && hp->fn == fn) 3022 break; 3023 3024 if (hp != NULL) { 3025 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 3026 kfree(hp, M_ACPIDEV); 3027 } 3028 ACPI_UNLOCK(acpi); 3029 } 3030 3031 static int 3032 acpiopen(struct dev_open_args *ap) 3033 { 3034 return (0); 3035 } 3036 3037 static int 3038 acpiclose(struct dev_close_args *ap) 3039 { 3040 return (0); 3041 } 3042 3043 static int 3044 acpiioctl(struct dev_ioctl_args *ap) 3045 { 3046 struct acpi_softc *sc; 3047 struct acpi_ioctl_hook *hp; 3048 int error, state; 3049 3050 error = 0; 3051 hp = NULL; 3052 sc = ap->a_head.a_dev->si_drv1; 3053 3054 /* 3055 * Scan the list of registered ioctls, looking for handlers. 3056 */ 3057 ACPI_LOCK(acpi); 3058 if (acpi_ioctl_hooks_initted) 3059 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3060 if (hp->cmd == ap->a_cmd) 3061 break; 3062 } 3063 ACPI_UNLOCK(acpi); 3064 if (hp) 3065 return (hp->fn(ap->a_cmd, ap->a_data, hp->arg)); 3066 3067 /* 3068 * Core ioctls are not permitted for non-writable user. 3069 * Currently, other ioctls just fetch information. 3070 * Not changing system behavior. 3071 */ 3072 if ((ap->a_fflag & FWRITE) == 0) 3073 return (EPERM); 3074 3075 /* Core system ioctls. */ 3076 switch (ap->a_cmd) { 3077 case ACPIIO_REQSLPSTATE: 3078 state = *(int *)ap->a_data; 3079 if (state != ACPI_STATE_S5) 3080 error = acpi_ReqSleepState(sc, state); 3081 else { 3082 kprintf("power off via acpi ioctl not supported\n"); 3083 error = ENXIO; 3084 } 3085 break; 3086 case ACPIIO_ACKSLPSTATE: 3087 error = EOPNOTSUPP; 3088 #if 0 /* notyet */ 3089 error = *(int *)ap->a_data; 3090 error = acpi_AckSleepState(sc->acpi_clone, error); 3091 #endif 3092 break; 3093 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3094 error = EINVAL; 3095 state = *(int *)ap->a_data; 3096 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3097 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3098 error = 0; 3099 break; 3100 default: 3101 error = ENXIO; 3102 break; 3103 } 3104 return (error); 3105 } 3106 3107 static int 3108 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3109 { 3110 int error; 3111 struct sbuf sb; 3112 UINT8 state, TypeA, TypeB; 3113 3114 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3115 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3116 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3117 sbuf_printf(&sb, "S%d ", state); 3118 sbuf_trim(&sb); 3119 sbuf_finish(&sb); 3120 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3121 sbuf_delete(&sb); 3122 return (error); 3123 } 3124 3125 static int 3126 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3127 { 3128 char sleep_state[10]; 3129 int error; 3130 u_int new_state, old_state; 3131 3132 old_state = *(u_int *)oidp->oid_arg1; 3133 if (old_state > ACPI_S_STATES_MAX + 1) 3134 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3135 else 3136 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3137 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3138 if (error == 0 && req->newptr != NULL) { 3139 new_state = ACPI_STATE_S0; 3140 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3141 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3142 break; 3143 if (new_state <= ACPI_S_STATES_MAX + 1) { 3144 if (new_state != old_state) 3145 *(u_int *)oidp->oid_arg1 = new_state; 3146 } else 3147 error = EINVAL; 3148 } 3149 3150 return (error); 3151 } 3152 3153 /* Inform devctl(4) when we receive a Notify. */ 3154 void 3155 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3156 { 3157 char notify_buf[16]; 3158 ACPI_BUFFER handle_buf; 3159 ACPI_STATUS status; 3160 3161 if (subsystem == NULL) 3162 return; 3163 3164 handle_buf.Pointer = NULL; 3165 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3166 status = AcpiNsHandleToPathname(h, &handle_buf); 3167 if (ACPI_FAILURE(status)) 3168 return; 3169 ksnprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3170 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3171 AcpiOsFree(handle_buf.Pointer); 3172 } 3173 3174 #ifdef ACPI_DEBUG 3175 /* 3176 * Support for parsing debug options from the kernel environment. 3177 * 3178 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3179 * by specifying the names of the bits in the debug.acpi.layer and 3180 * debug.acpi.level environment variables. Bits may be unset by 3181 * prefixing the bit name with !. 3182 */ 3183 struct debugtag 3184 { 3185 char *name; 3186 UINT32 value; 3187 }; 3188 3189 static struct debugtag dbg_layer[] = { 3190 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3191 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3192 {"ACPI_EVENTS", ACPI_EVENTS}, 3193 {"ACPI_TABLES", ACPI_TABLES}, 3194 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3195 {"ACPI_PARSER", ACPI_PARSER}, 3196 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3197 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3198 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3199 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3200 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3201 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3202 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3203 3204 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3205 {"ACPI_BATTERY", ACPI_BATTERY}, 3206 {"ACPI_BUS", ACPI_BUS}, 3207 {"ACPI_BUTTON", ACPI_BUTTON}, 3208 {"ACPI_EC", ACPI_EC}, 3209 {"ACPI_FAN", ACPI_FAN}, 3210 {"ACPI_POWERRES", ACPI_POWERRES}, 3211 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3212 {"ACPI_THERMAL", ACPI_THERMAL}, 3213 {"ACPI_TIMER", ACPI_TIMER}, 3214 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3215 {NULL, 0} 3216 }; 3217 3218 static struct debugtag dbg_level[] = { 3219 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3220 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3221 {"ACPI_LV_INFO", ACPI_LV_INFO}, 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