acpi.c revision 180760
1/*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.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 30#include <sys/cdefs.h> 31__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 180760 2008-07-23 15:13:06Z jhb $"); 32 33#include "opt_acpi.h" 34#include <sys/param.h> 35#include <sys/kernel.h> 36#include <sys/proc.h> 37#include <sys/fcntl.h> 38#include <sys/malloc.h> 39#include <sys/module.h> 40#include <sys/bus.h> 41#include <sys/conf.h> 42#include <sys/ioccom.h> 43#include <sys/reboot.h> 44#include <sys/sysctl.h> 45#include <sys/ctype.h> 46#include <sys/linker.h> 47#include <sys/power.h> 48#include <sys/sbuf.h> 49#include <sys/smp.h> 50 51#include <machine/resource.h> 52#include <machine/bus.h> 53#include <sys/rman.h> 54#include <isa/isavar.h> 55#include <isa/pnpvar.h> 56 57#include <contrib/dev/acpica/acpi.h> 58#include <dev/acpica/acpivar.h> 59#include <dev/acpica/acpiio.h> 60#include <contrib/dev/acpica/achware.h> 61#include <contrib/dev/acpica/acnamesp.h> 62 63#include "pci_if.h" 64#include <dev/pci/pcivar.h> 65#include <dev/pci/pci_private.h> 66 67#include <vm/vm_param.h> 68 69MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71/* Hooks for the ACPI CA debugging infrastructure */ 72#define _COMPONENT ACPI_BUS 73ACPI_MODULE_NAME("ACPI") 74 75static d_open_t acpiopen; 76static d_close_t acpiclose; 77static d_ioctl_t acpiioctl; 78 79static struct cdevsw acpi_cdevsw = { 80 .d_version = D_VERSION, 81 .d_open = acpiopen, 82 .d_close = acpiclose, 83 .d_ioctl = acpiioctl, 84 .d_name = "acpi", 85}; 86 87/* Global mutex for locking access to the ACPI subsystem. */ 88struct mtx acpi_mutex; 89 90/* Bitmap of device quirks. */ 91int acpi_quirks; 92 93static int acpi_modevent(struct module *mod, int event, void *junk); 94static int acpi_probe(device_t dev); 95static int acpi_attach(device_t dev); 96static int acpi_suspend(device_t dev); 97static int acpi_resume(device_t dev); 98static int acpi_shutdown(device_t dev); 99static device_t acpi_add_child(device_t bus, int order, const char *name, 100 int unit); 101static int acpi_print_child(device_t bus, device_t child); 102static void acpi_probe_nomatch(device_t bus, device_t child); 103static void acpi_driver_added(device_t dev, driver_t *driver); 104static int acpi_read_ivar(device_t dev, device_t child, int index, 105 uintptr_t *result); 106static int acpi_write_ivar(device_t dev, device_t child, int index, 107 uintptr_t value); 108static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 109static int acpi_sysres_alloc(device_t dev); 110static struct resource *acpi_alloc_resource(device_t bus, device_t child, 111 int type, int *rid, u_long start, u_long end, 112 u_long count, u_int flags); 113static int acpi_release_resource(device_t bus, device_t child, int type, 114 int rid, struct resource *r); 115static void acpi_delete_resource(device_t bus, device_t child, int type, 116 int rid); 117static uint32_t acpi_isa_get_logicalid(device_t dev); 118static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 119static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 120static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 121 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 122 ACPI_BUFFER *ret); 123static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 124 int *dstate); 125static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 126 void *context, void **retval); 127static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 128 int max_depth, acpi_scan_cb_t user_fn, void *arg); 129static int acpi_set_powerstate_method(device_t bus, device_t child, 130 int state); 131static int acpi_isa_pnp_probe(device_t bus, device_t child, 132 struct isa_pnp_id *ids); 133static void acpi_probe_children(device_t bus); 134static void acpi_probe_order(ACPI_HANDLE handle, int *order); 135static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 136 void *context, void **status); 137static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 138static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 139static void acpi_shutdown_final(void *arg, int howto); 140static void acpi_enable_fixed_events(struct acpi_softc *sc); 141static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143static int acpi_wake_prep_walk(int sstate); 144static int acpi_wake_sysctl_walk(device_t dev); 145static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146static void acpi_system_eventhandler_sleep(void *arg, int state); 147static void acpi_system_eventhandler_wakeup(void *arg, int state); 148static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150static int acpi_pm_func(u_long cmd, void *arg, ...); 151static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_probe, acpi_probe), 159 DEVMETHOD(device_attach, acpi_attach), 160 DEVMETHOD(device_shutdown, acpi_shutdown), 161 DEVMETHOD(device_detach, bus_generic_detach), 162 DEVMETHOD(device_suspend, acpi_suspend), 163 DEVMETHOD(device_resume, acpi_resume), 164 165 /* Bus interface */ 166 DEVMETHOD(bus_add_child, acpi_add_child), 167 DEVMETHOD(bus_print_child, acpi_print_child), 168 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 169 DEVMETHOD(bus_driver_added, acpi_driver_added), 170 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 171 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 172 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 173 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 174 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 175 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 176 DEVMETHOD(bus_release_resource, acpi_release_resource), 177 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 178 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 179 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 180 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 181 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 182 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 183 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 184 185 /* ACPI bus */ 186 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 187 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 188 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 189 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 190 191 /* PCI emulation */ 192 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 193 194 /* ISA emulation */ 195 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 196 197 {0, 0} 198}; 199 200static driver_t acpi_driver = { 201 "acpi", 202 acpi_methods, 203 sizeof(struct acpi_softc), 204}; 205 206static devclass_t acpi_devclass; 207DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 208MODULE_VERSION(acpi, 1); 209 210ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 211 212/* Local pools for managing system resources for ACPI child devices. */ 213static struct rman acpi_rman_io, acpi_rman_mem; 214 215#define ACPI_MINIMUM_AWAKETIME 5 216 217static const char* sleep_state_names[] = { 218 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 219 220/* Holds the description of the acpi0 device. */ 221static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 222 223SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 224static char acpi_ca_version[12]; 225SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 226 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 227 228/* 229 * Allow override of whether methods execute in parallel or not. 230 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 231 * errors for AML that really can't handle parallel method execution. 232 * It is off by default since this breaks recursive methods and 233 * some IBMs use such code. 234 */ 235static int acpi_serialize_methods; 236TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 237 238/* Power devices off and on in suspend and resume. XXX Remove once tested. */ 239static int acpi_do_powerstate = 1; 240TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 241SYSCTL_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. */ 245TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 246 247static int acpi_susp_bounce; 248SYSCTL_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 */ 257static int 258acpi_modevent(struct module *mod, int event, void *junk) 259{ 260 switch (event) { 261 case MOD_LOAD: 262 if (!cold) { 263 printf("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 */ 280ACPI_STATUS 281acpi_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 printf("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 if (acpi_quirks == ACPI_Q_OK) 306 acpi_table_quirks(&acpi_quirks); 307 308 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 309 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 310 acpi_quirks &= ~ACPI_Q_BROKEN; 311 if (acpi_quirks & ACPI_Q_BROKEN) { 312 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 313 status = AE_SUPPORT; 314 } 315 316 return_VALUE (status); 317} 318 319/* 320 * Detect ACPI and perform early initialisation. 321 */ 322int 323acpi_identify(void) 324{ 325 ACPI_TABLE_RSDP *rsdp; 326 ACPI_TABLE_HEADER *rsdt; 327 ACPI_PHYSICAL_ADDRESS paddr; 328 struct sbuf sb; 329 330 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 331 332 if (!cold) 333 return (ENXIO); 334 335 /* Check that we haven't been disabled with a hint. */ 336 if (resource_disabled("acpi", 0)) 337 return (ENXIO); 338 339 /* Check for other PM systems. */ 340 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 341 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 342 printf("ACPI identify failed, other PM system enabled.\n"); 343 return (ENXIO); 344 } 345 346 /* Initialize root tables. */ 347 if (ACPI_FAILURE(acpi_Startup())) { 348 printf("ACPI: Try disabling either ACPI or apic support.\n"); 349 return (ENXIO); 350 } 351 352 if ((paddr = AcpiOsGetRootPointer()) == 0 || 353 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 354 return (ENXIO); 355 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 356 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 357 else 358 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 359 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 360 361 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 362 return (ENXIO); 363 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN); 364 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 365 sbuf_trim(&sb); 366 sbuf_putc(&sb, ' '); 367 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 368 sbuf_trim(&sb); 369 sbuf_finish(&sb); 370 sbuf_delete(&sb); 371 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 372 373 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 374 375 return (0); 376} 377 378/* 379 * Fetch some descriptive data from ACPI to put in our attach message. 380 */ 381static int 382acpi_probe(device_t dev) 383{ 384 385 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 386 387 device_set_desc(dev, acpi_desc); 388 389 return_VALUE (0); 390} 391 392static int 393acpi_attach(device_t dev) 394{ 395 struct acpi_softc *sc; 396 ACPI_TABLE_FACS *facs; 397 ACPI_STATUS status; 398 int error, state; 399 UINT32 flags; 400 UINT8 TypeA, TypeB; 401 char *env; 402 403 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 404 405 sc = device_get_softc(dev); 406 sc->acpi_dev = dev; 407 callout_init(&sc->susp_force_to, TRUE); 408 409 error = ENXIO; 410 411 /* Initialize resource manager. */ 412 acpi_rman_io.rm_type = RMAN_ARRAY; 413 acpi_rman_io.rm_start = 0; 414 acpi_rman_io.rm_end = 0xffff; 415 acpi_rman_io.rm_descr = "ACPI I/O ports"; 416 if (rman_init(&acpi_rman_io) != 0) 417 panic("acpi rman_init IO ports failed"); 418 acpi_rman_mem.rm_type = RMAN_ARRAY; 419 acpi_rman_mem.rm_start = 0; 420 acpi_rman_mem.rm_end = ~0ul; 421 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 422 if (rman_init(&acpi_rman_mem) != 0) 423 panic("acpi rman_init memory failed"); 424 425 /* Initialise the ACPI mutex */ 426 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 427 428 /* 429 * Set the globals from our tunables. This is needed because ACPI-CA 430 * uses UINT8 for some values and we have no tunable_byte. 431 */ 432 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 433 AcpiGbl_EnableInterpreterSlack = TRUE; 434 435 /* Start up the ACPI CA subsystem. */ 436 status = AcpiInitializeSubsystem(); 437 if (ACPI_FAILURE(status)) { 438 device_printf(dev, "Could not initialize Subsystem: %s\n", 439 AcpiFormatException(status)); 440 goto out; 441 } 442 443 /* Load ACPI name space. */ 444 status = AcpiLoadTables(); 445 if (ACPI_FAILURE(status)) { 446 device_printf(dev, "Could not load Namespace: %s\n", 447 AcpiFormatException(status)); 448 goto out; 449 } 450 451 /* Install the default address space handlers. */ 452 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 453 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 454 if (ACPI_FAILURE(status)) { 455 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 456 AcpiFormatException(status)); 457 goto out; 458 } 459 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 460 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 461 if (ACPI_FAILURE(status)) { 462 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 463 AcpiFormatException(status)); 464 goto out; 465 } 466 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 467 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 468 if (ACPI_FAILURE(status)) { 469 device_printf(dev, "could not initialise PciConfig handler: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 474 /* 475 * Note that some systems (specifically, those with namespace evaluation 476 * issues that require the avoidance of parts of the namespace) must 477 * avoid running _INI and _STA on everything, as well as dodging the final 478 * object init pass. 479 * 480 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 481 * 482 * XXX We should arrange for the object init pass after we have attached 483 * all our child devices, but on many systems it works here. 484 */ 485 flags = 0; 486 if (testenv("debug.acpi.avoid")) 487 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 488 489 /* Bring the hardware and basic handlers online. */ 490 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 491 device_printf(dev, "Could not enable ACPI: %s\n", 492 AcpiFormatException(status)); 493 goto out; 494 } 495 496 /* 497 * Call the ECDT probe function to provide EC functionality before 498 * the namespace has been evaluated. 499 * 500 * XXX This happens before the sysresource devices have been probed and 501 * attached so its resources come from nexus0. In practice, this isn't 502 * a problem but should be addressed eventually. 503 */ 504 acpi_ec_ecdt_probe(dev); 505 506 /* Bring device objects and regions online. */ 507 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 508 device_printf(dev, "Could not initialize ACPI objects: %s\n", 509 AcpiFormatException(status)); 510 goto out; 511 } 512 513 /* 514 * Setup our sysctl tree. 515 * 516 * XXX: This doesn't check to make sure that none of these fail. 517 */ 518 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 519 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 520 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 521 device_get_name(dev), CTLFLAG_RD, 0, ""); 522 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 523 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 524 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 525 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 526 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 527 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 528 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 529 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 530 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 531 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 532 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 533 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 534 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 535 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 536 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 537 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 538 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 539 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 540 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 541 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 542 "sleep delay"); 543 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 544 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 545 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 546 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 547 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 548 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 549 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 550 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 551 OID_AUTO, "handle_reboot", CTLFLAG_RW, 552 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 553 554 /* 555 * Default to 1 second before sleeping to give some machines time to 556 * stabilize. 557 */ 558 sc->acpi_sleep_delay = 1; 559 if (bootverbose) 560 sc->acpi_verbose = 1; 561 if ((env = getenv("hw.acpi.verbose")) != NULL) { 562 if (strcmp(env, "0") != 0) 563 sc->acpi_verbose = 1; 564 freeenv(env); 565 } 566 567 /* Only enable S4BIOS by default if the FACS says it is available. */ 568 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 569 if (ACPI_FAILURE(status)) { 570 device_printf(dev, "couldn't get FACS: %s\n", 571 AcpiFormatException(status)); 572 error = ENXIO; 573 goto out; 574 } 575 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 576 sc->acpi_s4bios = 1; 577 578 /* 579 * Dispatch the default sleep state to devices. The lid switch is set 580 * to NONE by default to avoid surprising users. 581 */ 582 sc->acpi_power_button_sx = ACPI_STATE_S5; 583 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 584 sc->acpi_standby_sx = ACPI_STATE_S1; 585 sc->acpi_suspend_sx = ACPI_STATE_S3; 586 587 /* Pick the first valid sleep state for the sleep button default. */ 588 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 589 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 590 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 591 sc->acpi_sleep_button_sx = state; 592 break; 593 } 594 595 acpi_enable_fixed_events(sc); 596 597 /* 598 * Scan the namespace and attach/initialise children. 599 */ 600 601 /* Register our shutdown handler. */ 602 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 603 SHUTDOWN_PRI_LAST); 604 605 /* 606 * Register our acpi event handlers. 607 * XXX should be configurable eg. via userland policy manager. 608 */ 609 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 610 sc, ACPI_EVENT_PRI_LAST); 611 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 612 sc, ACPI_EVENT_PRI_LAST); 613 614 /* Flag our initial states. */ 615 sc->acpi_enabled = 1; 616 sc->acpi_sstate = ACPI_STATE_S0; 617 sc->acpi_sleep_disabled = 0; 618 619 /* Create the control device */ 620 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 621 "acpi"); 622 sc->acpi_dev_t->si_drv1 = sc; 623 624 if ((error = acpi_machdep_init(dev))) 625 goto out; 626 627 /* Register ACPI again to pass the correct argument of pm_func. */ 628 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 629 630 if (!acpi_disabled("bus")) 631 acpi_probe_children(dev); 632 633 error = 0; 634 635 out: 636 return_VALUE (error); 637} 638 639static int 640acpi_suspend(device_t dev) 641{ 642 device_t child, *devlist; 643 int error, i, numdevs, pstate; 644 645 GIANT_REQUIRED; 646 647 /* First give child devices a chance to suspend. */ 648 error = bus_generic_suspend(dev); 649 if (error) 650 return (error); 651 652 /* 653 * Now, set them into the appropriate power state, usually D3. If the 654 * device has an _SxD method for the next sleep state, use that power 655 * state instead. 656 */ 657 device_get_children(dev, &devlist, &numdevs); 658 for (i = 0; i < numdevs; i++) { 659 /* If the device is not attached, we've powered it down elsewhere. */ 660 child = devlist[i]; 661 if (!device_is_attached(child)) 662 continue; 663 664 /* 665 * Default to D3 for all sleep states. The _SxD method is optional 666 * so set the powerstate even if it's absent. 667 */ 668 pstate = PCI_POWERSTATE_D3; 669 error = acpi_device_pwr_for_sleep(device_get_parent(child), 670 child, &pstate); 671 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 672 pci_set_powerstate(child, pstate); 673 } 674 free(devlist, M_TEMP); 675 error = 0; 676 677 return (error); 678} 679 680static int 681acpi_resume(device_t dev) 682{ 683 ACPI_HANDLE handle; 684 int i, numdevs; 685 device_t child, *devlist; 686 687 GIANT_REQUIRED; 688 689 /* 690 * Put all devices in D0 before resuming them. Call _S0D on each one 691 * since some systems expect this. 692 */ 693 device_get_children(dev, &devlist, &numdevs); 694 for (i = 0; i < numdevs; i++) { 695 child = devlist[i]; 696 handle = acpi_get_handle(child); 697 if (handle) 698 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 699 if (device_is_attached(child) && acpi_do_powerstate) 700 pci_set_powerstate(child, PCI_POWERSTATE_D0); 701 } 702 free(devlist, M_TEMP); 703 704 return (bus_generic_resume(dev)); 705} 706 707static int 708acpi_shutdown(device_t dev) 709{ 710 711 GIANT_REQUIRED; 712 713 /* Allow children to shutdown first. */ 714 bus_generic_shutdown(dev); 715 716 /* 717 * Enable any GPEs that are able to power-on the system (i.e., RTC). 718 * Also, disable any that are not valid for this state (most). 719 */ 720 acpi_wake_prep_walk(ACPI_STATE_S5); 721 722 return (0); 723} 724 725/* 726 * Handle a new device being added 727 */ 728static device_t 729acpi_add_child(device_t bus, int order, const char *name, int unit) 730{ 731 struct acpi_device *ad; 732 device_t child; 733 734 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 735 return (NULL); 736 737 resource_list_init(&ad->ad_rl); 738 739 child = device_add_child_ordered(bus, order, name, unit); 740 if (child != NULL) 741 device_set_ivars(child, ad); 742 else 743 free(ad, M_ACPIDEV); 744 return (child); 745} 746 747static int 748acpi_print_child(device_t bus, device_t child) 749{ 750 struct acpi_device *adev = device_get_ivars(child); 751 struct resource_list *rl = &adev->ad_rl; 752 int retval = 0; 753 754 retval += bus_print_child_header(bus, child); 755 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 756 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 757 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 758 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 759 if (device_get_flags(child)) 760 retval += printf(" flags %#x", device_get_flags(child)); 761 retval += bus_print_child_footer(bus, child); 762 763 return (retval); 764} 765 766/* 767 * If this device is an ACPI child but no one claimed it, attempt 768 * to power it off. We'll power it back up when a driver is added. 769 * 770 * XXX Disabled for now since many necessary devices (like fdc and 771 * ATA) don't claim the devices we created for them but still expect 772 * them to be powered up. 773 */ 774static void 775acpi_probe_nomatch(device_t bus, device_t child) 776{ 777 778 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 779} 780 781/* 782 * If a new driver has a chance to probe a child, first power it up. 783 * 784 * XXX Disabled for now (see acpi_probe_nomatch for details). 785 */ 786static void 787acpi_driver_added(device_t dev, driver_t *driver) 788{ 789 device_t child, *devlist; 790 int i, numdevs; 791 792 DEVICE_IDENTIFY(driver, dev); 793 device_get_children(dev, &devlist, &numdevs); 794 for (i = 0; i < numdevs; i++) { 795 child = devlist[i]; 796 if (device_get_state(child) == DS_NOTPRESENT) { 797 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 798 if (device_probe_and_attach(child) != 0) 799 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 800 } 801 } 802 free(devlist, M_TEMP); 803} 804 805/* Location hint for devctl(8) */ 806static int 807acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 808 size_t buflen) 809{ 810 struct acpi_device *dinfo = device_get_ivars(child); 811 812 if (dinfo->ad_handle) 813 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 814 else 815 snprintf(buf, buflen, "unknown"); 816 return (0); 817} 818 819/* PnP information for devctl(8) */ 820static int 821acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 822 size_t buflen) 823{ 824 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 825 ACPI_DEVICE_INFO *adinfo; 826 struct acpi_device *dinfo = device_get_ivars(child); 827 char *end; 828 int error; 829 830 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 831 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 832 if (error) 833 snprintf(buf, buflen, "unknown"); 834 else 835 snprintf(buf, buflen, "_HID=%s _UID=%lu", 836 (adinfo->Valid & ACPI_VALID_HID) ? 837 adinfo->HardwareId.Value : "none", 838 (adinfo->Valid & ACPI_VALID_UID) ? 839 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 840 if (adinfo) 841 AcpiOsFree(adinfo); 842 843 return (0); 844} 845 846/* 847 * Handle per-device ivars 848 */ 849static int 850acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 851{ 852 struct acpi_device *ad; 853 854 if ((ad = device_get_ivars(child)) == NULL) { 855 printf("device has no ivars\n"); 856 return (ENOENT); 857 } 858 859 /* ACPI and ISA compatibility ivars */ 860 switch(index) { 861 case ACPI_IVAR_HANDLE: 862 *(ACPI_HANDLE *)result = ad->ad_handle; 863 break; 864 case ACPI_IVAR_MAGIC: 865 *(uintptr_t *)result = ad->ad_magic; 866 break; 867 case ACPI_IVAR_PRIVATE: 868 *(void **)result = ad->ad_private; 869 break; 870 case ACPI_IVAR_FLAGS: 871 *(int *)result = ad->ad_flags; 872 break; 873 case ISA_IVAR_VENDORID: 874 case ISA_IVAR_SERIAL: 875 case ISA_IVAR_COMPATID: 876 *(int *)result = -1; 877 break; 878 case ISA_IVAR_LOGICALID: 879 *(int *)result = acpi_isa_get_logicalid(child); 880 break; 881 default: 882 return (ENOENT); 883 } 884 885 return (0); 886} 887 888static int 889acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 890{ 891 struct acpi_device *ad; 892 893 if ((ad = device_get_ivars(child)) == NULL) { 894 printf("device has no ivars\n"); 895 return (ENOENT); 896 } 897 898 switch(index) { 899 case ACPI_IVAR_HANDLE: 900 ad->ad_handle = (ACPI_HANDLE)value; 901 break; 902 case ACPI_IVAR_MAGIC: 903 ad->ad_magic = (uintptr_t)value; 904 break; 905 case ACPI_IVAR_PRIVATE: 906 ad->ad_private = (void *)value; 907 break; 908 case ACPI_IVAR_FLAGS: 909 ad->ad_flags = (int)value; 910 break; 911 default: 912 panic("bad ivar write request (%d)", index); 913 return (ENOENT); 914 } 915 916 return (0); 917} 918 919/* 920 * Handle child resource allocation/removal 921 */ 922static struct resource_list * 923acpi_get_rlist(device_t dev, device_t child) 924{ 925 struct acpi_device *ad; 926 927 ad = device_get_ivars(child); 928 return (&ad->ad_rl); 929} 930 931/* 932 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 933 * duplicates, we merge any in the sysresource attach routine. 934 */ 935static int 936acpi_sysres_alloc(device_t dev) 937{ 938 struct resource *res; 939 struct resource_list *rl; 940 struct resource_list_entry *rle; 941 struct rman *rm; 942 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 943 device_t *children; 944 int child_count, i; 945 946 /* 947 * Probe/attach any sysresource devices. This would be unnecessary if we 948 * had multi-pass probe/attach. 949 */ 950 if (device_get_children(dev, &children, &child_count) != 0) 951 return (ENXIO); 952 for (i = 0; i < child_count; i++) { 953 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 954 device_probe_and_attach(children[i]); 955 } 956 free(children, M_TEMP); 957 958 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 959 STAILQ_FOREACH(rle, rl, link) { 960 if (rle->res != NULL) { 961 device_printf(dev, "duplicate resource for %lx\n", rle->start); 962 continue; 963 } 964 965 /* Only memory and IO resources are valid here. */ 966 switch (rle->type) { 967 case SYS_RES_IOPORT: 968 rm = &acpi_rman_io; 969 break; 970 case SYS_RES_MEMORY: 971 rm = &acpi_rman_mem; 972 break; 973 default: 974 continue; 975 } 976 977 /* Pre-allocate resource and add to our rman pool. */ 978 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 979 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 980 if (res != NULL) { 981 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 982 rle->res = res; 983 } else 984 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 985 rle->start, rle->count, rle->type); 986 } 987 return (0); 988} 989 990static struct resource * 991acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 992 u_long start, u_long end, u_long count, u_int flags) 993{ 994 ACPI_RESOURCE ares; 995 struct acpi_device *ad = device_get_ivars(child); 996 struct resource_list *rl = &ad->ad_rl; 997 struct resource_list_entry *rle; 998 struct resource *res; 999 struct rman *rm; 1000 1001 res = NULL; 1002 1003 /* We only handle memory and IO resources through rman. */ 1004 switch (type) { 1005 case SYS_RES_IOPORT: 1006 rm = &acpi_rman_io; 1007 break; 1008 case SYS_RES_MEMORY: 1009 rm = &acpi_rman_mem; 1010 break; 1011 default: 1012 rm = NULL; 1013 } 1014 1015 ACPI_SERIAL_BEGIN(acpi); 1016 1017 /* 1018 * If this is an allocation of the "default" range for a given RID, and 1019 * we know what the resources for this device are (i.e., they're on the 1020 * child's resource list), use those start/end values. 1021 */ 1022 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1023 rle = resource_list_find(rl, type, *rid); 1024 if (rle == NULL) 1025 goto out; 1026 start = rle->start; 1027 end = rle->end; 1028 count = rle->count; 1029 } 1030 1031 /* 1032 * If this is an allocation of a specific range, see if we can satisfy 1033 * the request from our system resource regions. If we can't, pass the 1034 * request up to the parent. 1035 */ 1036 if (start + count - 1 == end && rm != NULL) 1037 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1038 child); 1039 if (res == NULL) { 1040 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1041 start, end, count, flags); 1042 } else { 1043 rman_set_rid(res, *rid); 1044 1045 /* If requested, activate the resource using the parent's method. */ 1046 if (flags & RF_ACTIVE) 1047 if (bus_activate_resource(child, type, *rid, res) != 0) { 1048 rman_release_resource(res); 1049 res = NULL; 1050 goto out; 1051 } 1052 } 1053 1054 if (res != NULL && device_get_parent(child) == bus) 1055 switch (type) { 1056 case SYS_RES_IRQ: 1057 /* 1058 * Since bus_config_intr() takes immediate effect, we cannot 1059 * configure the interrupt associated with a device when we 1060 * parse the resources but have to defer it until a driver 1061 * actually allocates the interrupt via bus_alloc_resource(). 1062 * 1063 * XXX: Should we handle the lookup failing? 1064 */ 1065 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1066 acpi_config_intr(child, &ares); 1067 break; 1068 } 1069 1070out: 1071 ACPI_SERIAL_END(acpi); 1072 return (res); 1073} 1074 1075static int 1076acpi_release_resource(device_t bus, device_t child, int type, int rid, 1077 struct resource *r) 1078{ 1079 struct rman *rm; 1080 int ret; 1081 1082 /* We only handle memory and IO resources through rman. */ 1083 switch (type) { 1084 case SYS_RES_IOPORT: 1085 rm = &acpi_rman_io; 1086 break; 1087 case SYS_RES_MEMORY: 1088 rm = &acpi_rman_mem; 1089 break; 1090 default: 1091 rm = NULL; 1092 } 1093 1094 ACPI_SERIAL_BEGIN(acpi); 1095 1096 /* 1097 * If this resource belongs to one of our internal managers, 1098 * deactivate it and release it to the local pool. If it doesn't, 1099 * pass this request up to the parent. 1100 */ 1101 if (rm != NULL && rman_is_region_manager(r, rm)) { 1102 if (rman_get_flags(r) & RF_ACTIVE) { 1103 ret = bus_deactivate_resource(child, type, rid, r); 1104 if (ret != 0) 1105 goto out; 1106 } 1107 ret = rman_release_resource(r); 1108 } else 1109 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1110 1111out: 1112 ACPI_SERIAL_END(acpi); 1113 return (ret); 1114} 1115 1116static void 1117acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1118{ 1119 struct resource_list *rl; 1120 1121 rl = acpi_get_rlist(bus, child); 1122 resource_list_delete(rl, type, rid); 1123} 1124 1125/* Allocate an IO port or memory resource, given its GAS. */ 1126int 1127acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1128 struct resource **res, u_int flags) 1129{ 1130 int error, res_type; 1131 1132 error = ENOMEM; 1133 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1134 return (EINVAL); 1135 1136 /* We only support memory and IO spaces. */ 1137 switch (gas->SpaceId) { 1138 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1139 res_type = SYS_RES_MEMORY; 1140 break; 1141 case ACPI_ADR_SPACE_SYSTEM_IO: 1142 res_type = SYS_RES_IOPORT; 1143 break; 1144 default: 1145 return (EOPNOTSUPP); 1146 } 1147 1148 /* 1149 * If the register width is less than 8, assume the BIOS author means 1150 * it is a bit field and just allocate a byte. 1151 */ 1152 if (gas->BitWidth && gas->BitWidth < 8) 1153 gas->BitWidth = 8; 1154 1155 /* Validate the address after we're sure we support the space. */ 1156 if (gas->Address == 0 || gas->BitWidth == 0) 1157 return (EINVAL); 1158 1159 bus_set_resource(dev, res_type, *rid, gas->Address, 1160 gas->BitWidth / 8); 1161 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1162 if (*res != NULL) { 1163 *type = res_type; 1164 error = 0; 1165 } else 1166 bus_delete_resource(dev, res_type, *rid); 1167 1168 return (error); 1169} 1170 1171/* Probe _HID and _CID for compatible ISA PNP ids. */ 1172static uint32_t 1173acpi_isa_get_logicalid(device_t dev) 1174{ 1175 ACPI_DEVICE_INFO *devinfo; 1176 ACPI_BUFFER buf; 1177 ACPI_HANDLE h; 1178 ACPI_STATUS error; 1179 u_int32_t pnpid; 1180 1181 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1182 1183 pnpid = 0; 1184 buf.Pointer = NULL; 1185 buf.Length = ACPI_ALLOCATE_BUFFER; 1186 1187 /* Fetch and validate the HID. */ 1188 if ((h = acpi_get_handle(dev)) == NULL) 1189 goto out; 1190 error = AcpiGetObjectInfo(h, &buf); 1191 if (ACPI_FAILURE(error)) 1192 goto out; 1193 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1194 1195 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1196 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1197 1198out: 1199 if (buf.Pointer != NULL) 1200 AcpiOsFree(buf.Pointer); 1201 return_VALUE (pnpid); 1202} 1203 1204static int 1205acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1206{ 1207 ACPI_DEVICE_INFO *devinfo; 1208 ACPI_BUFFER buf; 1209 ACPI_HANDLE h; 1210 ACPI_STATUS error; 1211 uint32_t *pnpid; 1212 int valid, i; 1213 1214 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1215 1216 pnpid = cids; 1217 valid = 0; 1218 buf.Pointer = NULL; 1219 buf.Length = ACPI_ALLOCATE_BUFFER; 1220 1221 /* Fetch and validate the CID */ 1222 if ((h = acpi_get_handle(dev)) == NULL) 1223 goto out; 1224 error = AcpiGetObjectInfo(h, &buf); 1225 if (ACPI_FAILURE(error)) 1226 goto out; 1227 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1228 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1229 goto out; 1230 1231 if (devinfo->CompatibilityId.Count < count) 1232 count = devinfo->CompatibilityId.Count; 1233 for (i = 0; i < count; i++) { 1234 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1235 continue; 1236 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1237 valid++; 1238 } 1239 1240out: 1241 if (buf.Pointer != NULL) 1242 AcpiOsFree(buf.Pointer); 1243 return_VALUE (valid); 1244} 1245 1246static char * 1247acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1248{ 1249 ACPI_HANDLE h; 1250 int i; 1251 1252 h = acpi_get_handle(dev); 1253 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1254 return (NULL); 1255 1256 /* Try to match one of the array of IDs with a HID or CID. */ 1257 for (i = 0; ids[i] != NULL; i++) { 1258 if (acpi_MatchHid(h, ids[i])) 1259 return (ids[i]); 1260 } 1261 return (NULL); 1262} 1263 1264static ACPI_STATUS 1265acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1266 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1267{ 1268 ACPI_HANDLE h; 1269 1270 if (dev == NULL) 1271 h = ACPI_ROOT_OBJECT; 1272 else if ((h = acpi_get_handle(dev)) == NULL) 1273 return (AE_BAD_PARAMETER); 1274 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1275} 1276 1277static int 1278acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1279{ 1280 struct acpi_softc *sc; 1281 ACPI_HANDLE handle; 1282 ACPI_STATUS status; 1283 char sxd[8]; 1284 int error; 1285 1286 sc = device_get_softc(bus); 1287 handle = acpi_get_handle(dev); 1288 1289 /* 1290 * XXX If we find these devices, don't try to power them down. 1291 * The serial and IRDA ports on my T23 hang the system when 1292 * set to D3 and it appears that such legacy devices may 1293 * need special handling in their drivers. 1294 */ 1295 if (handle == NULL || 1296 acpi_MatchHid(handle, "PNP0500") || 1297 acpi_MatchHid(handle, "PNP0501") || 1298 acpi_MatchHid(handle, "PNP0502") || 1299 acpi_MatchHid(handle, "PNP0510") || 1300 acpi_MatchHid(handle, "PNP0511")) 1301 return (ENXIO); 1302 1303 /* 1304 * Override next state with the value from _SxD, if present. If no 1305 * dstate argument was provided, don't fetch the return value. 1306 */ 1307 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1308 if (dstate) 1309 status = acpi_GetInteger(handle, sxd, dstate); 1310 else 1311 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1312 1313 switch (status) { 1314 case AE_OK: 1315 error = 0; 1316 break; 1317 case AE_NOT_FOUND: 1318 error = ESRCH; 1319 break; 1320 default: 1321 error = ENXIO; 1322 break; 1323 } 1324 1325 return (error); 1326} 1327 1328/* Callback arg for our implementation of walking the namespace. */ 1329struct acpi_device_scan_ctx { 1330 acpi_scan_cb_t user_fn; 1331 void *arg; 1332 ACPI_HANDLE parent; 1333}; 1334 1335static ACPI_STATUS 1336acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1337{ 1338 struct acpi_device_scan_ctx *ctx; 1339 device_t dev, old_dev; 1340 ACPI_STATUS status; 1341 ACPI_OBJECT_TYPE type; 1342 1343 /* 1344 * Skip this device if we think we'll have trouble with it or it is 1345 * the parent where the scan began. 1346 */ 1347 ctx = (struct acpi_device_scan_ctx *)arg; 1348 if (acpi_avoid(h) || h == ctx->parent) 1349 return (AE_OK); 1350 1351 /* If this is not a valid device type (e.g., a method), skip it. */ 1352 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1353 return (AE_OK); 1354 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1355 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1356 return (AE_OK); 1357 1358 /* 1359 * Call the user function with the current device. If it is unchanged 1360 * afterwards, return. Otherwise, we update the handle to the new dev. 1361 */ 1362 old_dev = acpi_get_device(h); 1363 dev = old_dev; 1364 status = ctx->user_fn(h, &dev, level, ctx->arg); 1365 if (ACPI_FAILURE(status) || old_dev == dev) 1366 return (status); 1367 1368 /* Remove the old child and its connection to the handle. */ 1369 if (old_dev != NULL) { 1370 device_delete_child(device_get_parent(old_dev), old_dev); 1371 AcpiDetachData(h, acpi_fake_objhandler); 1372 } 1373 1374 /* Recreate the handle association if the user created a device. */ 1375 if (dev != NULL) 1376 AcpiAttachData(h, acpi_fake_objhandler, dev); 1377 1378 return (AE_OK); 1379} 1380 1381static ACPI_STATUS 1382acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1383 acpi_scan_cb_t user_fn, void *arg) 1384{ 1385 ACPI_HANDLE h; 1386 struct acpi_device_scan_ctx ctx; 1387 1388 if (acpi_disabled("children")) 1389 return (AE_OK); 1390 1391 if (dev == NULL) 1392 h = ACPI_ROOT_OBJECT; 1393 else if ((h = acpi_get_handle(dev)) == NULL) 1394 return (AE_BAD_PARAMETER); 1395 ctx.user_fn = user_fn; 1396 ctx.arg = arg; 1397 ctx.parent = h; 1398 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1399 acpi_device_scan_cb, &ctx, NULL)); 1400} 1401 1402/* 1403 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1404 * device power states since it's close enough to ACPI. 1405 */ 1406static int 1407acpi_set_powerstate_method(device_t bus, device_t child, int state) 1408{ 1409 ACPI_HANDLE h; 1410 ACPI_STATUS status; 1411 int error; 1412 1413 error = 0; 1414 h = acpi_get_handle(child); 1415 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1416 return (EINVAL); 1417 if (h == NULL) 1418 return (0); 1419 1420 /* Ignore errors if the power methods aren't present. */ 1421 status = acpi_pwr_switch_consumer(h, state); 1422 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1423 && status != AE_BAD_PARAMETER) 1424 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1425 state, acpi_name(h), AcpiFormatException(status)); 1426 1427 return (error); 1428} 1429 1430static int 1431acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1432{ 1433 int result, cid_count, i; 1434 uint32_t lid, cids[8]; 1435 1436 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1437 1438 /* 1439 * ISA-style drivers attached to ACPI may persist and 1440 * probe manually if we return ENOENT. We never want 1441 * that to happen, so don't ever return it. 1442 */ 1443 result = ENXIO; 1444 1445 /* Scan the supplied IDs for a match */ 1446 lid = acpi_isa_get_logicalid(child); 1447 cid_count = acpi_isa_get_compatid(child, cids, 8); 1448 while (ids && ids->ip_id) { 1449 if (lid == ids->ip_id) { 1450 result = 0; 1451 goto out; 1452 } 1453 for (i = 0; i < cid_count; i++) { 1454 if (cids[i] == ids->ip_id) { 1455 result = 0; 1456 goto out; 1457 } 1458 } 1459 ids++; 1460 } 1461 1462 out: 1463 if (result == 0 && ids->ip_desc) 1464 device_set_desc(child, ids->ip_desc); 1465 1466 return_VALUE (result); 1467} 1468 1469/* 1470 * Scan all of the ACPI namespace and attach child devices. 1471 * 1472 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1473 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1474 * However, in violation of the spec, some systems place their PCI link 1475 * devices in \, so we have to walk the whole namespace. We check the 1476 * type of namespace nodes, so this should be ok. 1477 */ 1478static void 1479acpi_probe_children(device_t bus) 1480{ 1481 1482 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1483 1484 /* 1485 * Scan the namespace and insert placeholders for all the devices that 1486 * we find. We also probe/attach any early devices. 1487 * 1488 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1489 * we want to create nodes for all devices, not just those that are 1490 * currently present. (This assumes that we don't want to create/remove 1491 * devices as they appear, which might be smarter.) 1492 */ 1493 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1494 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1495 bus, NULL); 1496 1497 /* Pre-allocate resources for our rman from any sysresource devices. */ 1498 acpi_sysres_alloc(bus); 1499 1500 /* Create any static children by calling device identify methods. */ 1501 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1502 bus_generic_probe(bus); 1503 1504 /* Probe/attach all children, created staticly and from the namespace. */ 1505 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1506 bus_generic_attach(bus); 1507 1508 /* 1509 * Some of these children may have attached others as part of their attach 1510 * process (eg. the root PCI bus driver), so rescan. 1511 */ 1512 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1513 bus_generic_attach(bus); 1514 1515 /* Attach wake sysctls. */ 1516 acpi_wake_sysctl_walk(bus); 1517 1518 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1519 return_VOID; 1520} 1521 1522/* 1523 * Determine the probe order for a given device. 1524 */ 1525static void 1526acpi_probe_order(ACPI_HANDLE handle, int *order) 1527{ 1528 ACPI_OBJECT_TYPE type; 1529 1530 /* 1531 * 1. I/O port and memory system resource holders 1532 * 2. Embedded controllers (to handle early accesses) 1533 * 3. PCI Link Devices 1534 * 100000. CPUs 1535 */ 1536 AcpiGetType(handle, &type); 1537 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1538 *order = 1; 1539 else if (acpi_MatchHid(handle, "PNP0C09")) 1540 *order = 2; 1541 else if (acpi_MatchHid(handle, "PNP0C0F")) 1542 *order = 3; 1543 else if (type == ACPI_TYPE_PROCESSOR) 1544 *order = 100000; 1545} 1546 1547/* 1548 * Evaluate a child device and determine whether we might attach a device to 1549 * it. 1550 */ 1551static ACPI_STATUS 1552acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1553{ 1554 ACPI_OBJECT_TYPE type; 1555 ACPI_HANDLE h; 1556 device_t bus, child; 1557 int order; 1558 char *handle_str, **search; 1559 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1560 1561 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1562 1563 /* Skip this device if we think we'll have trouble with it. */ 1564 if (acpi_avoid(handle)) 1565 return_ACPI_STATUS (AE_OK); 1566 1567 bus = (device_t)context; 1568 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1569 switch (type) { 1570 case ACPI_TYPE_DEVICE: 1571 case ACPI_TYPE_PROCESSOR: 1572 case ACPI_TYPE_THERMAL: 1573 case ACPI_TYPE_POWER: 1574 if (acpi_disabled("children")) 1575 break; 1576 1577 /* 1578 * Since we scan from \, be sure to skip system scope objects. 1579 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1580 */ 1581 handle_str = acpi_name(handle); 1582 for (search = scopes; *search != NULL; search++) { 1583 if (strcmp(handle_str, *search) == 0) 1584 break; 1585 } 1586 if (*search != NULL) 1587 break; 1588 1589 /* 1590 * Create a placeholder device for this node. Sort the 1591 * placeholder so that the probe/attach passes will run 1592 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER 1593 * are reserved for special objects (i.e., system 1594 * resources). CPU devices have a very high order to 1595 * ensure they are probed after other devices. 1596 */ 1597 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1598 order = level * 10 + 100; 1599 acpi_probe_order(handle, &order); 1600 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1601 if (child == NULL) 1602 break; 1603 1604 /* Associate the handle with the device_t and vice versa. */ 1605 acpi_set_handle(child, handle); 1606 AcpiAttachData(handle, acpi_fake_objhandler, child); 1607 1608 /* 1609 * Check that the device is present. If it's not present, 1610 * leave it disabled (so that we have a device_t attached to 1611 * the handle, but we don't probe it). 1612 * 1613 * XXX PCI link devices sometimes report "present" but not 1614 * "functional" (i.e. if disabled). Go ahead and probe them 1615 * anyway since we may enable them later. 1616 */ 1617 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1618 /* Never disable PCI link devices. */ 1619 if (acpi_MatchHid(handle, "PNP0C0F")) 1620 break; 1621 /* 1622 * Docking stations should remain enabled since the system 1623 * may be undocked at boot. 1624 */ 1625 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1626 break; 1627 1628 device_disable(child); 1629 break; 1630 } 1631 1632 /* 1633 * Get the device's resource settings and attach them. 1634 * Note that if the device has _PRS but no _CRS, we need 1635 * to decide when it's appropriate to try to configure the 1636 * device. Ignore the return value here; it's OK for the 1637 * device not to have any resources. 1638 */ 1639 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1640 break; 1641 } 1642 } 1643 1644 return_ACPI_STATUS (AE_OK); 1645} 1646 1647/* 1648 * AcpiAttachData() requires an object handler but never uses it. This is a 1649 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1650 */ 1651void 1652acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1653{ 1654} 1655 1656static void 1657acpi_shutdown_final(void *arg, int howto) 1658{ 1659 struct acpi_softc *sc; 1660 ACPI_STATUS status; 1661 1662 /* 1663 * XXX Shutdown code should only run on the BSP (cpuid 0). 1664 * Some chipsets do not power off the system correctly if called from 1665 * an AP. 1666 */ 1667 sc = arg; 1668 if ((howto & RB_POWEROFF) != 0) { 1669 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1670 if (ACPI_FAILURE(status)) { 1671 printf("AcpiEnterSleepStatePrep failed - %s\n", 1672 AcpiFormatException(status)); 1673 return; 1674 } 1675 printf("Powering system off using ACPI\n"); 1676 ACPI_DISABLE_IRQS(); 1677 status = AcpiEnterSleepState(ACPI_STATE_S5); 1678 if (ACPI_FAILURE(status)) { 1679 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1680 } else { 1681 DELAY(1000000); 1682 printf("ACPI power-off failed - timeout\n"); 1683 } 1684 } else if ((howto & RB_HALT) == 0 && 1685 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1686 sc->acpi_handle_reboot) { 1687 /* Reboot using the reset register. */ 1688 status = AcpiHwLowLevelWrite( 1689 AcpiGbl_FADT.ResetRegister.BitWidth, 1690 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1691 if (ACPI_FAILURE(status)) { 1692 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1693 } else { 1694 DELAY(1000000); 1695 printf("ACPI reset failed - timeout\n"); 1696 } 1697 } else if (sc->acpi_do_disable && panicstr == NULL) { 1698 /* 1699 * Only disable ACPI if the user requested. On some systems, writing 1700 * the disable value to SMI_CMD hangs the system. 1701 */ 1702 printf("Shutting down ACPI\n"); 1703 AcpiTerminate(); 1704 } 1705} 1706 1707static void 1708acpi_enable_fixed_events(struct acpi_softc *sc) 1709{ 1710 static int first_time = 1; 1711 1712 /* Enable and clear fixed events and install handlers. */ 1713 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1714 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1715 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1716 acpi_event_power_button_sleep, sc); 1717 if (first_time) 1718 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1719 } 1720 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1721 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1722 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1723 acpi_event_sleep_button_sleep, sc); 1724 if (first_time) 1725 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1726 } 1727 1728 first_time = 0; 1729} 1730 1731/* 1732 * Returns true if the device is actually present and should 1733 * be attached to. This requires the present, enabled, UI-visible 1734 * and diagnostics-passed bits to be set. 1735 */ 1736BOOLEAN 1737acpi_DeviceIsPresent(device_t dev) 1738{ 1739 ACPI_DEVICE_INFO *devinfo; 1740 ACPI_HANDLE h; 1741 ACPI_BUFFER buf; 1742 ACPI_STATUS error; 1743 int ret; 1744 1745 ret = FALSE; 1746 if ((h = acpi_get_handle(dev)) == NULL) 1747 return (FALSE); 1748 buf.Pointer = NULL; 1749 buf.Length = ACPI_ALLOCATE_BUFFER; 1750 error = AcpiGetObjectInfo(h, &buf); 1751 if (ACPI_FAILURE(error)) 1752 return (FALSE); 1753 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1754 1755 /* If no _STA method, must be present */ 1756 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1757 ret = TRUE; 1758 1759 /* Return true for 'present' and 'functioning' */ 1760 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1761 ret = TRUE; 1762 1763 AcpiOsFree(buf.Pointer); 1764 return (ret); 1765} 1766 1767/* 1768 * Returns true if the battery is actually present and inserted. 1769 */ 1770BOOLEAN 1771acpi_BatteryIsPresent(device_t dev) 1772{ 1773 ACPI_DEVICE_INFO *devinfo; 1774 ACPI_HANDLE h; 1775 ACPI_BUFFER buf; 1776 ACPI_STATUS error; 1777 int ret; 1778 1779 ret = FALSE; 1780 if ((h = acpi_get_handle(dev)) == NULL) 1781 return (FALSE); 1782 buf.Pointer = NULL; 1783 buf.Length = ACPI_ALLOCATE_BUFFER; 1784 error = AcpiGetObjectInfo(h, &buf); 1785 if (ACPI_FAILURE(error)) 1786 return (FALSE); 1787 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1788 1789 /* If no _STA method, must be present */ 1790 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1791 ret = TRUE; 1792 1793 /* Return true for 'present', 'battery present', and 'functioning' */ 1794 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1795 ret = TRUE; 1796 1797 AcpiOsFree(buf.Pointer); 1798 return (ret); 1799} 1800 1801/* 1802 * Match a HID string against a handle 1803 */ 1804static BOOLEAN 1805acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1806{ 1807 ACPI_DEVICE_INFO *devinfo; 1808 ACPI_BUFFER buf; 1809 ACPI_STATUS error; 1810 int ret, i; 1811 1812 ret = FALSE; 1813 if (hid == NULL || h == NULL) 1814 return (ret); 1815 buf.Pointer = NULL; 1816 buf.Length = ACPI_ALLOCATE_BUFFER; 1817 error = AcpiGetObjectInfo(h, &buf); 1818 if (ACPI_FAILURE(error)) 1819 return (ret); 1820 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1821 1822 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1823 strcmp(hid, devinfo->HardwareId.Value) == 0) 1824 ret = TRUE; 1825 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1826 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1827 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1828 ret = TRUE; 1829 break; 1830 } 1831 } 1832 } 1833 1834 AcpiOsFree(buf.Pointer); 1835 return (ret); 1836} 1837 1838/* 1839 * Return the handle of a named object within our scope, ie. that of (parent) 1840 * or one if its parents. 1841 */ 1842ACPI_STATUS 1843acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1844{ 1845 ACPI_HANDLE r; 1846 ACPI_STATUS status; 1847 1848 /* Walk back up the tree to the root */ 1849 for (;;) { 1850 status = AcpiGetHandle(parent, path, &r); 1851 if (ACPI_SUCCESS(status)) { 1852 *result = r; 1853 return (AE_OK); 1854 } 1855 /* XXX Return error here? */ 1856 if (status != AE_NOT_FOUND) 1857 return (AE_OK); 1858 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1859 return (AE_NOT_FOUND); 1860 parent = r; 1861 } 1862} 1863 1864/* Find the difference between two PM tick counts. */ 1865uint32_t 1866acpi_TimerDelta(uint32_t end, uint32_t start) 1867{ 1868 uint32_t delta; 1869 1870 if (end >= start) 1871 delta = end - start; 1872 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1873 delta = ((0xFFFFFFFF - start) + end + 1); 1874 else 1875 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1876 return (delta); 1877} 1878 1879/* 1880 * Allocate a buffer with a preset data size. 1881 */ 1882ACPI_BUFFER * 1883acpi_AllocBuffer(int size) 1884{ 1885 ACPI_BUFFER *buf; 1886 1887 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1888 return (NULL); 1889 buf->Length = size; 1890 buf->Pointer = (void *)(buf + 1); 1891 return (buf); 1892} 1893 1894ACPI_STATUS 1895acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1896{ 1897 ACPI_OBJECT arg1; 1898 ACPI_OBJECT_LIST args; 1899 1900 arg1.Type = ACPI_TYPE_INTEGER; 1901 arg1.Integer.Value = number; 1902 args.Count = 1; 1903 args.Pointer = &arg1; 1904 1905 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1906} 1907 1908/* 1909 * Evaluate a path that should return an integer. 1910 */ 1911ACPI_STATUS 1912acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1913{ 1914 ACPI_STATUS status; 1915 ACPI_BUFFER buf; 1916 ACPI_OBJECT param; 1917 1918 if (handle == NULL) 1919 handle = ACPI_ROOT_OBJECT; 1920 1921 /* 1922 * Assume that what we've been pointed at is an Integer object, or 1923 * a method that will return an Integer. 1924 */ 1925 buf.Pointer = ¶m; 1926 buf.Length = sizeof(param); 1927 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1928 if (ACPI_SUCCESS(status)) { 1929 if (param.Type == ACPI_TYPE_INTEGER) 1930 *number = param.Integer.Value; 1931 else 1932 status = AE_TYPE; 1933 } 1934 1935 /* 1936 * In some applications, a method that's expected to return an Integer 1937 * may instead return a Buffer (probably to simplify some internal 1938 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1939 * convert it into an Integer as best we can. 1940 * 1941 * This is a hack. 1942 */ 1943 if (status == AE_BUFFER_OVERFLOW) { 1944 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1945 status = AE_NO_MEMORY; 1946 } else { 1947 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1948 if (ACPI_SUCCESS(status)) 1949 status = acpi_ConvertBufferToInteger(&buf, number); 1950 AcpiOsFree(buf.Pointer); 1951 } 1952 } 1953 return (status); 1954} 1955 1956ACPI_STATUS 1957acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1958{ 1959 ACPI_OBJECT *p; 1960 UINT8 *val; 1961 int i; 1962 1963 p = (ACPI_OBJECT *)bufp->Pointer; 1964 if (p->Type == ACPI_TYPE_INTEGER) { 1965 *number = p->Integer.Value; 1966 return (AE_OK); 1967 } 1968 if (p->Type != ACPI_TYPE_BUFFER) 1969 return (AE_TYPE); 1970 if (p->Buffer.Length > sizeof(int)) 1971 return (AE_BAD_DATA); 1972 1973 *number = 0; 1974 val = p->Buffer.Pointer; 1975 for (i = 0; i < p->Buffer.Length; i++) 1976 *number += val[i] << (i * 8); 1977 return (AE_OK); 1978} 1979 1980/* 1981 * Iterate over the elements of an a package object, calling the supplied 1982 * function for each element. 1983 * 1984 * XXX possible enhancement might be to abort traversal on error. 1985 */ 1986ACPI_STATUS 1987acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1988 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1989{ 1990 ACPI_OBJECT *comp; 1991 int i; 1992 1993 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1994 return (AE_BAD_PARAMETER); 1995 1996 /* Iterate over components */ 1997 i = 0; 1998 comp = pkg->Package.Elements; 1999 for (; i < pkg->Package.Count; i++, comp++) 2000 func(comp, arg); 2001 2002 return (AE_OK); 2003} 2004 2005/* 2006 * Find the (index)th resource object in a set. 2007 */ 2008ACPI_STATUS 2009acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2010{ 2011 ACPI_RESOURCE *rp; 2012 int i; 2013 2014 rp = (ACPI_RESOURCE *)buf->Pointer; 2015 i = index; 2016 while (i-- > 0) { 2017 /* Range check */ 2018 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2019 return (AE_BAD_PARAMETER); 2020 2021 /* Check for terminator */ 2022 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2023 return (AE_NOT_FOUND); 2024 rp = ACPI_NEXT_RESOURCE(rp); 2025 } 2026 if (resp != NULL) 2027 *resp = rp; 2028 2029 return (AE_OK); 2030} 2031 2032/* 2033 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2034 * 2035 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2036 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2037 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2038 * resources. 2039 */ 2040#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2041 2042ACPI_STATUS 2043acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2044{ 2045 ACPI_RESOURCE *rp; 2046 void *newp; 2047 2048 /* Initialise the buffer if necessary. */ 2049 if (buf->Pointer == NULL) { 2050 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2051 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2052 return (AE_NO_MEMORY); 2053 rp = (ACPI_RESOURCE *)buf->Pointer; 2054 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2055 rp->Length = 0; 2056 } 2057 if (res == NULL) 2058 return (AE_OK); 2059 2060 /* 2061 * Scan the current buffer looking for the terminator. 2062 * This will either find the terminator or hit the end 2063 * of the buffer and return an error. 2064 */ 2065 rp = (ACPI_RESOURCE *)buf->Pointer; 2066 for (;;) { 2067 /* Range check, don't go outside the buffer */ 2068 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2069 return (AE_BAD_PARAMETER); 2070 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2071 break; 2072 rp = ACPI_NEXT_RESOURCE(rp); 2073 } 2074 2075 /* 2076 * Check the size of the buffer and expand if required. 2077 * 2078 * Required size is: 2079 * size of existing resources before terminator + 2080 * size of new resource and header + 2081 * size of terminator. 2082 * 2083 * Note that this loop should really only run once, unless 2084 * for some reason we are stuffing a *really* huge resource. 2085 */ 2086 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2087 res->Length + ACPI_RS_SIZE_NO_DATA + 2088 ACPI_RS_SIZE_MIN) >= buf->Length) { 2089 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2090 return (AE_NO_MEMORY); 2091 bcopy(buf->Pointer, newp, buf->Length); 2092 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2093 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2094 AcpiOsFree(buf->Pointer); 2095 buf->Pointer = newp; 2096 buf->Length += buf->Length; 2097 } 2098 2099 /* Insert the new resource. */ 2100 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2101 2102 /* And add the terminator. */ 2103 rp = ACPI_NEXT_RESOURCE(rp); 2104 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2105 rp->Length = 0; 2106 2107 return (AE_OK); 2108} 2109 2110/* 2111 * Set interrupt model. 2112 */ 2113ACPI_STATUS 2114acpi_SetIntrModel(int model) 2115{ 2116 2117 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2118} 2119 2120/* 2121 * DEPRECATED. This interface has serious deficiencies and will be 2122 * removed. 2123 * 2124 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2125 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2126 */ 2127ACPI_STATUS 2128acpi_SetSleepState(struct acpi_softc *sc, int state) 2129{ 2130 static int once; 2131 2132 if (!once) { 2133 printf( 2134"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2135 once = 1; 2136 } 2137 return (acpi_EnterSleepState(sc, state)); 2138} 2139 2140static void 2141acpi_sleep_force(void *arg) 2142{ 2143 struct acpi_softc *sc; 2144 2145 printf("acpi: suspend request timed out, forcing sleep now\n"); 2146 sc = arg; 2147 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2148 printf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2149} 2150 2151/* 2152 * Request that the system enter the given suspend state. All /dev/apm 2153 * devices and devd(8) will be notified. Userland then has a chance to 2154 * save state and acknowledge the request. The system sleeps once all 2155 * acks are in. 2156 */ 2157int 2158acpi_ReqSleepState(struct acpi_softc *sc, int state) 2159{ 2160 struct apm_clone_data *clone; 2161 2162 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2163 return (EINVAL); 2164 2165 /* S5 (soft-off) should be entered directly with no waiting. */ 2166 if (state == ACPI_STATE_S5) { 2167 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2168 return (0); 2169 else 2170 return (ENXIO); 2171 } 2172 2173#if !defined(__i386__) 2174 /* This platform does not support acpi suspend/resume. */ 2175 return (EOPNOTSUPP); 2176#endif 2177 2178 /* If a suspend request is already in progress, just return. */ 2179 ACPI_LOCK(acpi); 2180 if (sc->acpi_next_sstate != 0) { 2181 ACPI_UNLOCK(acpi); 2182 return (0); 2183 } 2184 2185 /* Record the pending state and notify all apm devices. */ 2186 sc->acpi_next_sstate = state; 2187 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2188 clone->notify_status = APM_EV_NONE; 2189 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2190 selwakeuppri(&clone->sel_read, PZERO); 2191 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2192 } 2193 } 2194 2195 /* If devd(8) is not running, immediately enter the sleep state. */ 2196 if (devctl_process_running() == FALSE) { 2197 ACPI_UNLOCK(acpi); 2198 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) { 2199 return (0); 2200 } else { 2201 return (ENXIO); 2202 } 2203 } 2204 2205 /* Now notify devd(8) also. */ 2206 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2207 2208 /* 2209 * Set a timeout to fire if userland doesn't ack the suspend request 2210 * in time. This way we still eventually go to sleep if we were 2211 * overheating or running low on battery, even if userland is hung. 2212 * We cancel this timeout once all userland acks are in or the 2213 * suspend request is aborted. 2214 */ 2215 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2216 ACPI_UNLOCK(acpi); 2217 return (0); 2218} 2219 2220/* 2221 * Acknowledge (or reject) a pending sleep state. The caller has 2222 * prepared for suspend and is now ready for it to proceed. If the 2223 * error argument is non-zero, it indicates suspend should be cancelled 2224 * and gives an errno value describing why. Once all votes are in, 2225 * we suspend the system. 2226 */ 2227int 2228acpi_AckSleepState(struct apm_clone_data *clone, int error) 2229{ 2230 struct acpi_softc *sc; 2231 int ret, sleeping; 2232 2233#if !defined(__i386__) 2234 /* This platform does not support acpi suspend/resume. */ 2235 return (EOPNOTSUPP); 2236#endif 2237 2238 /* If no pending sleep state, return an error. */ 2239 ACPI_LOCK(acpi); 2240 sc = clone->acpi_sc; 2241 if (sc->acpi_next_sstate == 0) { 2242 ACPI_UNLOCK(acpi); 2243 return (ENXIO); 2244 } 2245 2246 /* Caller wants to abort suspend process. */ 2247 if (error) { 2248 sc->acpi_next_sstate = 0; 2249 callout_stop(&sc->susp_force_to); 2250 printf("acpi: listener on %s cancelled the pending suspend\n", 2251 devtoname(clone->cdev)); 2252 ACPI_UNLOCK(acpi); 2253 return (0); 2254 } 2255 2256 /* 2257 * Mark this device as acking the suspend request. Then, walk through 2258 * all devices, seeing if they agree yet. We only count devices that 2259 * are writable since read-only devices couldn't ack the request. 2260 */ 2261 clone->notify_status = APM_EV_ACKED; 2262 sleeping = TRUE; 2263 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2264 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2265 clone->notify_status != APM_EV_ACKED) { 2266 sleeping = FALSE; 2267 break; 2268 } 2269 } 2270 2271 /* If all devices have voted "yes", we will suspend now. */ 2272 if (sleeping) 2273 callout_stop(&sc->susp_force_to); 2274 ACPI_UNLOCK(acpi); 2275 ret = 0; 2276 if (sleeping) { 2277 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2278 ret = ENODEV; 2279 } 2280 2281 return (ret); 2282} 2283 2284static void 2285acpi_sleep_enable(void *arg) 2286{ 2287 2288 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2289} 2290 2291enum acpi_sleep_state { 2292 ACPI_SS_NONE, 2293 ACPI_SS_GPE_SET, 2294 ACPI_SS_DEV_SUSPEND, 2295 ACPI_SS_SLP_PREP, 2296 ACPI_SS_SLEPT, 2297}; 2298 2299/* 2300 * Enter the desired system sleep state. 2301 * 2302 * Currently we support S1-S5 but S4 is only S4BIOS 2303 */ 2304static ACPI_STATUS 2305acpi_EnterSleepState(struct acpi_softc *sc, int state) 2306{ 2307 ACPI_STATUS status; 2308 UINT8 TypeA; 2309 UINT8 TypeB; 2310 enum acpi_sleep_state slp_state; 2311 2312 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2313 2314 /* Re-entry once we're suspending is not allowed. */ 2315 status = AE_OK; 2316 ACPI_LOCK(acpi); 2317 if (sc->acpi_sleep_disabled) { 2318 ACPI_UNLOCK(acpi); 2319 printf("acpi: suspend request ignored (not ready yet)\n"); 2320 return (AE_ERROR); 2321 } 2322 sc->acpi_sleep_disabled = 1; 2323 ACPI_UNLOCK(acpi); 2324 2325 /* 2326 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2327 * drivers need this. 2328 */ 2329 mtx_lock(&Giant); 2330 slp_state = ACPI_SS_NONE; 2331 switch (state) { 2332 case ACPI_STATE_S1: 2333 case ACPI_STATE_S2: 2334 case ACPI_STATE_S3: 2335 case ACPI_STATE_S4: 2336 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2337 if (status == AE_NOT_FOUND) { 2338 device_printf(sc->acpi_dev, 2339 "Sleep state S%d not supported by BIOS\n", state); 2340 break; 2341 } else if (ACPI_FAILURE(status)) { 2342 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2343 AcpiFormatException(status)); 2344 break; 2345 } 2346 2347 sc->acpi_sstate = state; 2348 2349 /* Enable any GPEs as appropriate and requested by the user. */ 2350 acpi_wake_prep_walk(state); 2351 slp_state = ACPI_SS_GPE_SET; 2352 2353 /* 2354 * Inform all devices that we are going to sleep. If at least one 2355 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2356 * 2357 * XXX Note that a better two-pass approach with a 'veto' pass 2358 * followed by a "real thing" pass would be better, but the current 2359 * bus interface does not provide for this. 2360 */ 2361 if (DEVICE_SUSPEND(root_bus) != 0) { 2362 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2363 break; 2364 } 2365 slp_state = ACPI_SS_DEV_SUSPEND; 2366 2367 /* If testing device suspend only, back out of everything here. */ 2368 if (acpi_susp_bounce) 2369 break; 2370 2371 status = AcpiEnterSleepStatePrep(state); 2372 if (ACPI_FAILURE(status)) { 2373 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2374 AcpiFormatException(status)); 2375 break; 2376 } 2377 slp_state = ACPI_SS_SLP_PREP; 2378 2379 if (sc->acpi_sleep_delay > 0) 2380 DELAY(sc->acpi_sleep_delay * 1000000); 2381 2382 if (state != ACPI_STATE_S1) { 2383 acpi_sleep_machdep(sc, state); 2384 2385 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2386 if (state == ACPI_STATE_S4) 2387 AcpiEnable(); 2388 } else { 2389 ACPI_DISABLE_IRQS(); 2390 status = AcpiEnterSleepState(state); 2391 if (ACPI_FAILURE(status)) { 2392 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2393 AcpiFormatException(status)); 2394 break; 2395 } 2396 } 2397 slp_state = ACPI_SS_SLEPT; 2398 break; 2399 case ACPI_STATE_S5: 2400 /* 2401 * Shut down cleanly and power off. This will call us back through the 2402 * shutdown handlers. 2403 */ 2404 shutdown_nice(RB_POWEROFF); 2405 break; 2406 case ACPI_STATE_S0: 2407 default: 2408 status = AE_BAD_PARAMETER; 2409 break; 2410 } 2411 2412 /* 2413 * Back out state according to how far along we got in the suspend 2414 * process. This handles both the error and success cases. 2415 */ 2416 sc->acpi_next_sstate = 0; 2417 if (slp_state >= ACPI_SS_GPE_SET) { 2418 acpi_wake_prep_walk(state); 2419 sc->acpi_sstate = ACPI_STATE_S0; 2420 } 2421 if (slp_state >= ACPI_SS_SLP_PREP) 2422 AcpiLeaveSleepState(state); 2423 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2424 DEVICE_RESUME(root_bus); 2425 if (slp_state >= ACPI_SS_SLEPT) 2426 acpi_enable_fixed_events(sc); 2427 2428 /* Allow another sleep request after a while. */ 2429 if (state != ACPI_STATE_S5) 2430 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2431 2432 /* Run /etc/rc.resume after we are back. */ 2433 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2434 2435 mtx_unlock(&Giant); 2436 return_ACPI_STATUS (status); 2437} 2438 2439/* Initialize a device's wake GPE. */ 2440int 2441acpi_wake_init(device_t dev, int type) 2442{ 2443 struct acpi_prw_data prw; 2444 2445 /* Evaluate _PRW to find the GPE. */ 2446 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2447 return (ENXIO); 2448 2449 /* Set the requested type for the GPE (runtime, wake, or both). */ 2450 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2451 device_printf(dev, "set GPE type failed\n"); 2452 return (ENXIO); 2453 } 2454 2455 return (0); 2456} 2457 2458/* Enable or disable the device's wake GPE. */ 2459int 2460acpi_wake_set_enable(device_t dev, int enable) 2461{ 2462 struct acpi_prw_data prw; 2463 ACPI_STATUS status; 2464 int flags; 2465 2466 /* Make sure the device supports waking the system and get the GPE. */ 2467 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2468 return (ENXIO); 2469 2470 flags = acpi_get_flags(dev); 2471 if (enable) { 2472 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2473 if (ACPI_FAILURE(status)) { 2474 device_printf(dev, "enable wake failed\n"); 2475 return (ENXIO); 2476 } 2477 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2478 } else { 2479 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2480 if (ACPI_FAILURE(status)) { 2481 device_printf(dev, "disable wake failed\n"); 2482 return (ENXIO); 2483 } 2484 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2485 } 2486 2487 return (0); 2488} 2489 2490static int 2491acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2492{ 2493 struct acpi_prw_data prw; 2494 device_t dev; 2495 2496 /* Check that this is a wake-capable device and get its GPE. */ 2497 if (acpi_parse_prw(handle, &prw) != 0) 2498 return (ENXIO); 2499 dev = acpi_get_device(handle); 2500 2501 /* 2502 * The destination sleep state must be less than (i.e., higher power) 2503 * or equal to the value specified by _PRW. If this GPE cannot be 2504 * enabled for the next sleep state, then disable it. If it can and 2505 * the user requested it be enabled, turn on any required power resources 2506 * and set _PSW. 2507 */ 2508 if (sstate > prw.lowest_wake) { 2509 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2510 if (bootverbose) 2511 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2512 acpi_name(handle), sstate); 2513 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2514 acpi_pwr_wake_enable(handle, 1); 2515 acpi_SetInteger(handle, "_PSW", 1); 2516 if (bootverbose) 2517 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2518 acpi_name(handle), sstate); 2519 } 2520 2521 return (0); 2522} 2523 2524static int 2525acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2526{ 2527 struct acpi_prw_data prw; 2528 device_t dev; 2529 2530 /* 2531 * Check that this is a wake-capable device and get its GPE. Return 2532 * now if the user didn't enable this device for wake. 2533 */ 2534 if (acpi_parse_prw(handle, &prw) != 0) 2535 return (ENXIO); 2536 dev = acpi_get_device(handle); 2537 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2538 return (0); 2539 2540 /* 2541 * If this GPE couldn't be enabled for the previous sleep state, it was 2542 * disabled before going to sleep so re-enable it. If it was enabled, 2543 * clear _PSW and turn off any power resources it used. 2544 */ 2545 if (sstate > prw.lowest_wake) { 2546 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2547 if (bootverbose) 2548 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2549 } else { 2550 acpi_SetInteger(handle, "_PSW", 0); 2551 acpi_pwr_wake_enable(handle, 0); 2552 if (bootverbose) 2553 device_printf(dev, "run_prep cleaned up for %s\n", 2554 acpi_name(handle)); 2555 } 2556 2557 return (0); 2558} 2559 2560static ACPI_STATUS 2561acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2562{ 2563 int sstate; 2564 2565 /* If suspending, run the sleep prep function, otherwise wake. */ 2566 sstate = *(int *)context; 2567 if (AcpiGbl_SystemAwakeAndRunning) 2568 acpi_wake_sleep_prep(handle, sstate); 2569 else 2570 acpi_wake_run_prep(handle, sstate); 2571 return (AE_OK); 2572} 2573 2574/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2575static int 2576acpi_wake_prep_walk(int sstate) 2577{ 2578 ACPI_HANDLE sb_handle; 2579 2580 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2581 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2582 acpi_wake_prep, &sstate, NULL); 2583 return (0); 2584} 2585 2586/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2587static int 2588acpi_wake_sysctl_walk(device_t dev) 2589{ 2590 int error, i, numdevs; 2591 device_t *devlist; 2592 device_t child; 2593 ACPI_STATUS status; 2594 2595 error = device_get_children(dev, &devlist, &numdevs); 2596 if (error != 0 || numdevs == 0) { 2597 if (numdevs == 0) 2598 free(devlist, M_TEMP); 2599 return (error); 2600 } 2601 for (i = 0; i < numdevs; i++) { 2602 child = devlist[i]; 2603 acpi_wake_sysctl_walk(child); 2604 if (!device_is_attached(child)) 2605 continue; 2606 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2607 if (ACPI_SUCCESS(status)) { 2608 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2609 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2610 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2611 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2612 } 2613 } 2614 free(devlist, M_TEMP); 2615 2616 return (0); 2617} 2618 2619/* Enable or disable wake from userland. */ 2620static int 2621acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2622{ 2623 int enable, error; 2624 device_t dev; 2625 2626 dev = (device_t)arg1; 2627 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2628 2629 error = sysctl_handle_int(oidp, &enable, 0, req); 2630 if (error != 0 || req->newptr == NULL) 2631 return (error); 2632 if (enable != 0 && enable != 1) 2633 return (EINVAL); 2634 2635 return (acpi_wake_set_enable(dev, enable)); 2636} 2637 2638/* Parse a device's _PRW into a structure. */ 2639int 2640acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2641{ 2642 ACPI_STATUS status; 2643 ACPI_BUFFER prw_buffer; 2644 ACPI_OBJECT *res, *res2; 2645 int error, i, power_count; 2646 2647 if (h == NULL || prw == NULL) 2648 return (EINVAL); 2649 2650 /* 2651 * The _PRW object (7.2.9) is only required for devices that have the 2652 * ability to wake the system from a sleeping state. 2653 */ 2654 error = EINVAL; 2655 prw_buffer.Pointer = NULL; 2656 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2657 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2658 if (ACPI_FAILURE(status)) 2659 return (ENOENT); 2660 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2661 if (res == NULL) 2662 return (ENOENT); 2663 if (!ACPI_PKG_VALID(res, 2)) 2664 goto out; 2665 2666 /* 2667 * Element 1 of the _PRW object: 2668 * The lowest power system sleeping state that can be entered while still 2669 * providing wake functionality. The sleeping state being entered must 2670 * be less than (i.e., higher power) or equal to this value. 2671 */ 2672 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2673 goto out; 2674 2675 /* 2676 * Element 0 of the _PRW object: 2677 */ 2678 switch (res->Package.Elements[0].Type) { 2679 case ACPI_TYPE_INTEGER: 2680 /* 2681 * If the data type of this package element is numeric, then this 2682 * _PRW package element is the bit index in the GPEx_EN, in the 2683 * GPE blocks described in the FADT, of the enable bit that is 2684 * enabled for the wake event. 2685 */ 2686 prw->gpe_handle = NULL; 2687 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2688 error = 0; 2689 break; 2690 case ACPI_TYPE_PACKAGE: 2691 /* 2692 * If the data type of this package element is a package, then this 2693 * _PRW package element is itself a package containing two 2694 * elements. The first is an object reference to the GPE Block 2695 * device that contains the GPE that will be triggered by the wake 2696 * event. The second element is numeric and it contains the bit 2697 * index in the GPEx_EN, in the GPE Block referenced by the 2698 * first element in the package, of the enable bit that is enabled for 2699 * the wake event. 2700 * 2701 * For example, if this field is a package then it is of the form: 2702 * Package() {\_SB.PCI0.ISA.GPE, 2} 2703 */ 2704 res2 = &res->Package.Elements[0]; 2705 if (!ACPI_PKG_VALID(res2, 2)) 2706 goto out; 2707 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2708 if (prw->gpe_handle == NULL) 2709 goto out; 2710 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2711 goto out; 2712 error = 0; 2713 break; 2714 default: 2715 goto out; 2716 } 2717 2718 /* Elements 2 to N of the _PRW object are power resources. */ 2719 power_count = res->Package.Count - 2; 2720 if (power_count > ACPI_PRW_MAX_POWERRES) { 2721 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2722 power_count = 0; 2723 } 2724 prw->power_res_count = power_count; 2725 for (i = 0; i < power_count; i++) 2726 prw->power_res[i] = res->Package.Elements[i]; 2727 2728out: 2729 if (prw_buffer.Pointer != NULL) 2730 AcpiOsFree(prw_buffer.Pointer); 2731 return (error); 2732} 2733 2734/* 2735 * ACPI Event Handlers 2736 */ 2737 2738/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2739 2740static void 2741acpi_system_eventhandler_sleep(void *arg, int state) 2742{ 2743 int ret; 2744 2745 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2746 2747 /* Check if button action is disabled. */ 2748 if (state == ACPI_S_STATES_MAX + 1) 2749 return; 2750 2751 /* Request that the system prepare to enter the given suspend state. */ 2752 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2753 if (ret != 0) 2754 printf("acpi: request to enter state S%d failed (err %d)\n", 2755 state, ret); 2756 2757 return_VOID; 2758} 2759 2760static void 2761acpi_system_eventhandler_wakeup(void *arg, int state) 2762{ 2763 2764 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2765 2766 /* Currently, nothing to do for wakeup. */ 2767 2768 return_VOID; 2769} 2770 2771/* 2772 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2773 */ 2774UINT32 2775acpi_event_power_button_sleep(void *context) 2776{ 2777 struct acpi_softc *sc = (struct acpi_softc *)context; 2778 2779 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2780 2781 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2782 2783 return_VALUE (ACPI_INTERRUPT_HANDLED); 2784} 2785 2786UINT32 2787acpi_event_power_button_wake(void *context) 2788{ 2789 struct acpi_softc *sc = (struct acpi_softc *)context; 2790 2791 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2792 2793 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2794 2795 return_VALUE (ACPI_INTERRUPT_HANDLED); 2796} 2797 2798UINT32 2799acpi_event_sleep_button_sleep(void *context) 2800{ 2801 struct acpi_softc *sc = (struct acpi_softc *)context; 2802 2803 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2804 2805 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2806 2807 return_VALUE (ACPI_INTERRUPT_HANDLED); 2808} 2809 2810UINT32 2811acpi_event_sleep_button_wake(void *context) 2812{ 2813 struct acpi_softc *sc = (struct acpi_softc *)context; 2814 2815 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2816 2817 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2818 2819 return_VALUE (ACPI_INTERRUPT_HANDLED); 2820} 2821 2822/* 2823 * XXX This static buffer is suboptimal. There is no locking so only 2824 * use this for single-threaded callers. 2825 */ 2826char * 2827acpi_name(ACPI_HANDLE handle) 2828{ 2829 ACPI_BUFFER buf; 2830 static char data[256]; 2831 2832 buf.Length = sizeof(data); 2833 buf.Pointer = data; 2834 2835 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2836 return (data); 2837 return ("(unknown)"); 2838} 2839 2840/* 2841 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2842 * parts of the namespace. 2843 */ 2844int 2845acpi_avoid(ACPI_HANDLE handle) 2846{ 2847 char *cp, *env, *np; 2848 int len; 2849 2850 np = acpi_name(handle); 2851 if (*np == '\\') 2852 np++; 2853 if ((env = getenv("debug.acpi.avoid")) == NULL) 2854 return (0); 2855 2856 /* Scan the avoid list checking for a match */ 2857 cp = env; 2858 for (;;) { 2859 while (*cp != 0 && isspace(*cp)) 2860 cp++; 2861 if (*cp == 0) 2862 break; 2863 len = 0; 2864 while (cp[len] != 0 && !isspace(cp[len])) 2865 len++; 2866 if (!strncmp(cp, np, len)) { 2867 freeenv(env); 2868 return(1); 2869 } 2870 cp += len; 2871 } 2872 freeenv(env); 2873 2874 return (0); 2875} 2876 2877/* 2878 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2879 */ 2880int 2881acpi_disabled(char *subsys) 2882{ 2883 char *cp, *env; 2884 int len; 2885 2886 if ((env = getenv("debug.acpi.disabled")) == NULL) 2887 return (0); 2888 if (strcmp(env, "all") == 0) { 2889 freeenv(env); 2890 return (1); 2891 } 2892 2893 /* Scan the disable list, checking for a match. */ 2894 cp = env; 2895 for (;;) { 2896 while (*cp != '\0' && isspace(*cp)) 2897 cp++; 2898 if (*cp == '\0') 2899 break; 2900 len = 0; 2901 while (cp[len] != '\0' && !isspace(cp[len])) 2902 len++; 2903 if (strncmp(cp, subsys, len) == 0) { 2904 freeenv(env); 2905 return (1); 2906 } 2907 cp += len; 2908 } 2909 freeenv(env); 2910 2911 return (0); 2912} 2913 2914/* 2915 * Control interface. 2916 * 2917 * We multiplex ioctls for all participating ACPI devices here. Individual 2918 * drivers wanting to be accessible via /dev/acpi should use the 2919 * register/deregister interface to make their handlers visible. 2920 */ 2921struct acpi_ioctl_hook 2922{ 2923 TAILQ_ENTRY(acpi_ioctl_hook) link; 2924 u_long cmd; 2925 acpi_ioctl_fn fn; 2926 void *arg; 2927}; 2928 2929static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2930static int acpi_ioctl_hooks_initted; 2931 2932int 2933acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2934{ 2935 struct acpi_ioctl_hook *hp; 2936 2937 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2938 return (ENOMEM); 2939 hp->cmd = cmd; 2940 hp->fn = fn; 2941 hp->arg = arg; 2942 2943 ACPI_LOCK(acpi); 2944 if (acpi_ioctl_hooks_initted == 0) { 2945 TAILQ_INIT(&acpi_ioctl_hooks); 2946 acpi_ioctl_hooks_initted = 1; 2947 } 2948 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2949 ACPI_UNLOCK(acpi); 2950 2951 return (0); 2952} 2953 2954void 2955acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2956{ 2957 struct acpi_ioctl_hook *hp; 2958 2959 ACPI_LOCK(acpi); 2960 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2961 if (hp->cmd == cmd && hp->fn == fn) 2962 break; 2963 2964 if (hp != NULL) { 2965 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2966 free(hp, M_ACPIDEV); 2967 } 2968 ACPI_UNLOCK(acpi); 2969} 2970 2971static int 2972acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2973{ 2974 return (0); 2975} 2976 2977static int 2978acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2979{ 2980 return (0); 2981} 2982 2983static int 2984acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2985{ 2986 struct acpi_softc *sc; 2987 struct acpi_ioctl_hook *hp; 2988 int error, state; 2989 2990 error = 0; 2991 hp = NULL; 2992 sc = dev->si_drv1; 2993 2994 /* 2995 * Scan the list of registered ioctls, looking for handlers. 2996 */ 2997 ACPI_LOCK(acpi); 2998 if (acpi_ioctl_hooks_initted) 2999 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 3000 if (hp->cmd == cmd) 3001 break; 3002 } 3003 ACPI_UNLOCK(acpi); 3004 if (hp) 3005 return (hp->fn(cmd, addr, hp->arg)); 3006 3007 /* 3008 * Core ioctls are not permitted for non-writable user. 3009 * Currently, other ioctls just fetch information. 3010 * Not changing system behavior. 3011 */ 3012 if ((flag & FWRITE) == 0) 3013 return (EPERM); 3014 3015 /* Core system ioctls. */ 3016 switch (cmd) { 3017 case ACPIIO_REQSLPSTATE: 3018 state = *(int *)addr; 3019 if (state != ACPI_STATE_S5) 3020 error = acpi_ReqSleepState(sc, state); 3021 else { 3022 printf("power off via acpi ioctl not supported\n"); 3023 error = ENXIO; 3024 } 3025 break; 3026 case ACPIIO_ACKSLPSTATE: 3027 error = *(int *)addr; 3028 error = acpi_AckSleepState(sc->acpi_clone, error); 3029 break; 3030 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3031 error = EINVAL; 3032 state = *(int *)addr; 3033 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3034 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3035 error = 0; 3036 break; 3037 default: 3038 error = ENXIO; 3039 break; 3040 } 3041 3042 return (error); 3043} 3044 3045static int 3046acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3047{ 3048 int error; 3049 struct sbuf sb; 3050 UINT8 state, TypeA, TypeB; 3051 3052 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3053 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3054 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3055 sbuf_printf(&sb, "S%d ", state); 3056 sbuf_trim(&sb); 3057 sbuf_finish(&sb); 3058 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3059 sbuf_delete(&sb); 3060 return (error); 3061} 3062 3063static int 3064acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3065{ 3066 char sleep_state[10]; 3067 int error; 3068 u_int new_state, old_state; 3069 3070 old_state = *(u_int *)oidp->oid_arg1; 3071 if (old_state > ACPI_S_STATES_MAX + 1) 3072 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3073 else 3074 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3075 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3076 if (error == 0 && req->newptr != NULL) { 3077 new_state = ACPI_STATE_S0; 3078 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3079 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3080 break; 3081 if (new_state <= ACPI_S_STATES_MAX + 1) { 3082 if (new_state != old_state) 3083 *(u_int *)oidp->oid_arg1 = new_state; 3084 } else 3085 error = EINVAL; 3086 } 3087 3088 return (error); 3089} 3090 3091/* Inform devctl(4) when we receive a Notify. */ 3092void 3093acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3094{ 3095 char notify_buf[16]; 3096 ACPI_BUFFER handle_buf; 3097 ACPI_STATUS status; 3098 3099 if (subsystem == NULL) 3100 return; 3101 3102 handle_buf.Pointer = NULL; 3103 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3104 status = AcpiNsHandleToPathname(h, &handle_buf); 3105 if (ACPI_FAILURE(status)) 3106 return; 3107 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3108 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3109 AcpiOsFree(handle_buf.Pointer); 3110} 3111 3112#ifdef ACPI_DEBUG 3113/* 3114 * Support for parsing debug options from the kernel environment. 3115 * 3116 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3117 * by specifying the names of the bits in the debug.acpi.layer and 3118 * debug.acpi.level environment variables. Bits may be unset by 3119 * prefixing the bit name with !. 3120 */ 3121struct debugtag 3122{ 3123 char *name; 3124 UINT32 value; 3125}; 3126 3127static struct debugtag dbg_layer[] = { 3128 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3129 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3130 {"ACPI_EVENTS", ACPI_EVENTS}, 3131 {"ACPI_TABLES", ACPI_TABLES}, 3132 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3133 {"ACPI_PARSER", ACPI_PARSER}, 3134 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3135 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3136 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3137 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3138 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3139 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3140 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3141 3142 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3143 {"ACPI_BATTERY", ACPI_BATTERY}, 3144 {"ACPI_BUS", ACPI_BUS}, 3145 {"ACPI_BUTTON", ACPI_BUTTON}, 3146 {"ACPI_EC", ACPI_EC}, 3147 {"ACPI_FAN", ACPI_FAN}, 3148 {"ACPI_POWERRES", ACPI_POWERRES}, 3149 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3150 {"ACPI_THERMAL", ACPI_THERMAL}, 3151 {"ACPI_TIMER", ACPI_TIMER}, 3152 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3153 {NULL, 0} 3154}; 3155 3156static struct debugtag dbg_level[] = { 3157 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 3158 {"ACPI_LV_WARN", ACPI_LV_WARN}, 3159 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3160 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3161 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3162 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3163 3164 /* Trace verbosity level 1 [Standard Trace Level] */ 3165 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3166 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3167 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3168 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3169 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3170 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3171 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3172 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3173 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3174 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3175 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3176 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3177 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3178 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3179 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3180 3181 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3182 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3183 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3184 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3185 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3186 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3187 3188 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3189 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3190 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3191 {"ACPI_LV_IO", ACPI_LV_IO}, 3192 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3193 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3194 3195 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3196 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3197 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3198 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3199 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3200 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3201 {NULL, 0} 3202}; 3203 3204static void 3205acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3206{ 3207 char *ep; 3208 int i, l; 3209 int set; 3210 3211 while (*cp) { 3212 if (isspace(*cp)) { 3213 cp++; 3214 continue; 3215 } 3216 ep = cp; 3217 while (*ep && !isspace(*ep)) 3218 ep++; 3219 if (*cp == '!') { 3220 set = 0; 3221 cp++; 3222 if (cp == ep) 3223 continue; 3224 } else { 3225 set = 1; 3226 } 3227 l = ep - cp; 3228 for (i = 0; tag[i].name != NULL; i++) { 3229 if (!strncmp(cp, tag[i].name, l)) { 3230 if (set) 3231 *flag |= tag[i].value; 3232 else 3233 *flag &= ~tag[i].value; 3234 } 3235 } 3236 cp = ep; 3237 } 3238} 3239 3240static void 3241acpi_set_debugging(void *junk) 3242{ 3243 char *layer, *level; 3244 3245 if (cold) { 3246 AcpiDbgLayer = 0; 3247 AcpiDbgLevel = 0; 3248 } 3249 3250 layer = getenv("debug.acpi.layer"); 3251 level = getenv("debug.acpi.level"); 3252 if (layer == NULL && level == NULL) 3253 return; 3254 3255 printf("ACPI set debug"); 3256 if (layer != NULL) { 3257 if (strcmp("NONE", layer) != 0) 3258 printf(" layer '%s'", layer); 3259 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3260 freeenv(layer); 3261 } 3262 if (level != NULL) { 3263 if (strcmp("NONE", level) != 0) 3264 printf(" level '%s'", level); 3265 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3266 freeenv(level); 3267 } 3268 printf("\n"); 3269} 3270 3271SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3272 NULL); 3273 3274static int 3275acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3276{ 3277 int error, *dbg; 3278 struct debugtag *tag; 3279 struct sbuf sb; 3280 3281 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3282 return (ENOMEM); 3283 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3284 tag = &dbg_layer[0]; 3285 dbg = &AcpiDbgLayer; 3286 } else { 3287 tag = &dbg_level[0]; 3288 dbg = &AcpiDbgLevel; 3289 } 3290 3291 /* Get old values if this is a get request. */ 3292 ACPI_SERIAL_BEGIN(acpi); 3293 if (*dbg == 0) { 3294 sbuf_cpy(&sb, "NONE"); 3295 } else if (req->newptr == NULL) { 3296 for (; tag->name != NULL; tag++) { 3297 if ((*dbg & tag->value) == tag->value) 3298 sbuf_printf(&sb, "%s ", tag->name); 3299 } 3300 } 3301 sbuf_trim(&sb); 3302 sbuf_finish(&sb); 3303 3304 /* Copy out the old values to the user. */ 3305 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3306 sbuf_delete(&sb); 3307 3308 /* If the user is setting a string, parse it. */ 3309 if (error == 0 && req->newptr != NULL) { 3310 *dbg = 0; 3311 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3312 acpi_set_debugging(NULL); 3313 } 3314 ACPI_SERIAL_END(acpi); 3315 3316 return (error); 3317} 3318 3319SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3320 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3321SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3322 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3323#endif /* ACPI_DEBUG */ 3324 3325static int 3326acpi_pm_func(u_long cmd, void *arg, ...) 3327{ 3328 int state, acpi_state; 3329 int error; 3330 struct acpi_softc *sc; 3331 va_list ap; 3332 3333 error = 0; 3334 switch (cmd) { 3335 case POWER_CMD_SUSPEND: 3336 sc = (struct acpi_softc *)arg; 3337 if (sc == NULL) { 3338 error = EINVAL; 3339 goto out; 3340 } 3341 3342 va_start(ap, arg); 3343 state = va_arg(ap, int); 3344 va_end(ap); 3345 3346 switch (state) { 3347 case POWER_SLEEP_STATE_STANDBY: 3348 acpi_state = sc->acpi_standby_sx; 3349 break; 3350 case POWER_SLEEP_STATE_SUSPEND: 3351 acpi_state = sc->acpi_suspend_sx; 3352 break; 3353 case POWER_SLEEP_STATE_HIBERNATE: 3354 acpi_state = ACPI_STATE_S4; 3355 break; 3356 default: 3357 error = EINVAL; 3358 goto out; 3359 } 3360 3361 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3362 error = ENXIO; 3363 break; 3364 default: 3365 error = EINVAL; 3366 goto out; 3367 } 3368 3369out: 3370 return (error); 3371} 3372 3373static void 3374acpi_pm_register(void *arg) 3375{ 3376 if (!cold || resource_disabled("acpi", 0)) 3377 return; 3378 3379 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3380} 3381 3382SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3383