acpi.c revision 172153
1178476Sjb/*- 2178476Sjb * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3178476Sjb * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4178476Sjb * Copyright (c) 2000, 2001 Michael Smith 5178476Sjb * Copyright (c) 2000 BSDi 6178476Sjb * All rights reserved. 7178476Sjb * 8178476Sjb * Redistribution and use in source and binary forms, with or without 9178476Sjb * modification, are permitted provided that the following conditions 10178476Sjb * are met: 11178476Sjb * 1. Redistributions of source code must retain the above copyright 12178476Sjb * notice, this list of conditions and the following disclaimer. 13178476Sjb * 2. Redistributions in binary form must reproduce the above copyright 14178476Sjb * notice, this list of conditions and the following disclaimer in the 15178476Sjb * documentation and/or other materials provided with the distribution. 16178476Sjb * 17178476Sjb * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18178476Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19178476Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20178476Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21178476Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22178476Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23178476Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24178476Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25178476Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26178476Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27178476Sjb * SUCH DAMAGE. 28178476Sjb */ 29178476Sjb 30178476Sjb#include <sys/cdefs.h> 31178476Sjb__FBSDID("$FreeBSD: head/sys/dev/acpica/acpi.c 172153 2007-09-13 01:37:17Z njl $"); 32178476Sjb 33178476Sjb#include "opt_acpi.h" 34178476Sjb#include <sys/param.h> 35178476Sjb#include <sys/kernel.h> 36178476Sjb#include <sys/proc.h> 37178476Sjb#include <sys/fcntl.h> 38178476Sjb#include <sys/malloc.h> 39178476Sjb#include <sys/module.h> 40178476Sjb#include <sys/bus.h> 41178476Sjb#include <sys/conf.h> 42178476Sjb#include <sys/ioccom.h> 43178476Sjb#include <sys/reboot.h> 44178476Sjb#include <sys/sysctl.h> 45178476Sjb#include <sys/ctype.h> 46178476Sjb#include <sys/linker.h> 47178476Sjb#include <sys/power.h> 48178476Sjb#include <sys/sbuf.h> 49178476Sjb#include <sys/smp.h> 50178476Sjb 51178476Sjb#include <machine/resource.h> 52178476Sjb#include <machine/bus.h> 53178476Sjb#include <sys/rman.h> 54178476Sjb#include <isa/isavar.h> 55178476Sjb#include <isa/pnpvar.h> 56178476Sjb 57178476Sjb#include <contrib/dev/acpica/acpi.h> 58178476Sjb#include <dev/acpica/acpivar.h> 59178476Sjb#include <dev/acpica/acpiio.h> 60178476Sjb#include <contrib/dev/acpica/achware.h> 61178476Sjb#include <contrib/dev/acpica/acnamesp.h> 62178476Sjb 63178476Sjb#include "pci_if.h" 64178476Sjb#include <dev/pci/pcivar.h> 65178476Sjb#include <dev/pci/pci_private.h> 66178476Sjb 67178476Sjb#include <vm/vm_param.h> 68178476Sjb 69178476SjbMALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70178476Sjb 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 void acpi_identify(driver_t *driver, device_t parent); 95static int acpi_probe(device_t dev); 96static int acpi_attach(device_t dev); 97static int acpi_suspend(device_t dev); 98static int acpi_resume(device_t dev); 99static int acpi_shutdown(device_t dev); 100static device_t acpi_add_child(device_t bus, int order, const char *name, 101 int unit); 102static int acpi_print_child(device_t bus, device_t child); 103static void acpi_probe_nomatch(device_t bus, device_t child); 104static void acpi_driver_added(device_t dev, driver_t *driver); 105static int acpi_read_ivar(device_t dev, device_t child, int index, 106 uintptr_t *result); 107static int acpi_write_ivar(device_t dev, device_t child, int index, 108 uintptr_t value); 109static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 110static int acpi_sysres_alloc(device_t dev); 111static struct resource *acpi_alloc_resource(device_t bus, device_t child, 112 int type, int *rid, u_long start, u_long end, 113 u_long count, u_int flags); 114static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118static uint32_t acpi_isa_get_logicalid(device_t dev); 119static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134static void acpi_probe_children(device_t bus); 135static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state); 140static void acpi_shutdown_final(void *arg, int howto); 141static void acpi_enable_fixed_events(struct acpi_softc *sc); 142static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 143static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 144static int acpi_wake_prep_walk(int sstate); 145static int acpi_wake_sysctl_walk(device_t dev); 146static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 147static void acpi_system_eventhandler_sleep(void *arg, int state); 148static void acpi_system_eventhandler_wakeup(void *arg, int state); 149static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 151static int acpi_pm_func(u_long cmd, void *arg, ...); 152static int acpi_child_location_str_method(device_t acdev, device_t child, 153 char *buf, size_t buflen); 154static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 155 char *buf, size_t buflen); 156 157static device_method_t acpi_methods[] = { 158 /* Device interface */ 159 DEVMETHOD(device_identify, acpi_identify), 160 DEVMETHOD(device_probe, acpi_probe), 161 DEVMETHOD(device_attach, acpi_attach), 162 DEVMETHOD(device_shutdown, acpi_shutdown), 163 DEVMETHOD(device_detach, bus_generic_detach), 164 DEVMETHOD(device_suspend, acpi_suspend), 165 DEVMETHOD(device_resume, acpi_resume), 166 167 /* Bus interface */ 168 DEVMETHOD(bus_add_child, acpi_add_child), 169 DEVMETHOD(bus_print_child, acpi_print_child), 170 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 171 DEVMETHOD(bus_driver_added, acpi_driver_added), 172 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 173 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 174 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 175 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 176 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 177 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 178 DEVMETHOD(bus_release_resource, acpi_release_resource), 179 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 180 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 181 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 182 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 183 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 184 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 185 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 186 187 /* ACPI bus */ 188 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 189 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 190 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 191 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 192 193 /* PCI emulation */ 194 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 195 196 /* ISA emulation */ 197 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 198 199 {0, 0} 200}; 201 202static driver_t acpi_driver = { 203 "acpi", 204 acpi_methods, 205 sizeof(struct acpi_softc), 206}; 207 208static devclass_t acpi_devclass; 209DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 210MODULE_VERSION(acpi, 1); 211 212ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 213 214/* Local pools for managing system resources for ACPI child devices. */ 215static struct rman acpi_rman_io, acpi_rman_mem; 216 217#define ACPI_MINIMUM_AWAKETIME 5 218 219static const char* sleep_state_names[] = { 220 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 221 222SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 223static char acpi_ca_version[12]; 224SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 225 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 226 227/* 228 * Allow override of whether methods execute in parallel or not. 229 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 230 * errors for AML that really can't handle parallel method execution. 231 * It is off by default since this breaks recursive methods and 232 * some IBMs use such code. 233 */ 234static int acpi_serialize_methods; 235TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 236 237/* Power devices off and on in suspend and resume. XXX Remove once tested. */ 238static int acpi_do_powerstate = 1; 239TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 240SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 241 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 242 243/* Allow users to override quirks. */ 244TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 245 246static int acpi_susp_bounce; 247SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW, 248 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices."); 249 250/* 251 * ACPI can only be loaded as a module by the loader; activating it after 252 * system bootstrap time is not useful, and can be fatal to the system. 253 * It also cannot be unloaded, since the entire system bus heirarchy hangs 254 * off it. 255 */ 256static int 257acpi_modevent(struct module *mod, int event, void *junk) 258{ 259 switch (event) { 260 case MOD_LOAD: 261 if (!cold) { 262 printf("The ACPI driver cannot be loaded after boot.\n"); 263 return (EPERM); 264 } 265 break; 266 case MOD_UNLOAD: 267 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 268 return (EBUSY); 269 break; 270 default: 271 break; 272 } 273 return (0); 274} 275 276/* 277 * Perform early initialization. 278 */ 279ACPI_STATUS 280acpi_Startup(void) 281{ 282 static int started = 0; 283 ACPI_STATUS status; 284 int val; 285 286 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 287 288 /* Only run the startup code once. The MADT driver also calls this. */ 289 if (started) 290 return_VALUE (AE_OK); 291 started = 1; 292 293 /* 294 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 295 * if more tables exist. 296 */ 297 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 298 printf("ACPI: Table initialisation failed: %s\n", 299 AcpiFormatException(status)); 300 return_VALUE (status); 301 } 302 303 /* Set up any quirks we have for this system. */ 304 if (acpi_quirks == ACPI_Q_OK) 305 acpi_table_quirks(&acpi_quirks); 306 307 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 308 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 309 acpi_quirks &= ~ACPI_Q_BROKEN; 310 if (acpi_quirks & ACPI_Q_BROKEN) { 311 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 312 status = AE_SUPPORT; 313 } 314 315 return_VALUE (status); 316} 317 318/* 319 * Detect ACPI, perform early initialisation 320 */ 321static void 322acpi_identify(driver_t *driver, device_t parent) 323{ 324 device_t child; 325 326 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 327 328 if (!cold) 329 return_VOID; 330 331 /* Check that we haven't been disabled with a hint. */ 332 if (resource_disabled("acpi", 0)) 333 return_VOID; 334 335 /* Make sure we're not being doubly invoked. */ 336 if (device_find_child(parent, "acpi", 0) != NULL) 337 return_VOID; 338 339 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 340 341 /* Initialize root tables. */ 342 if (ACPI_FAILURE(acpi_Startup())) { 343 printf("ACPI: Try disabling either ACPI or apic support.\n"); 344 return_VOID; 345 } 346 347 /* Attach the actual ACPI device. */ 348 if ((child = BUS_ADD_CHILD(parent, 10, "acpi", 0)) == NULL) { 349 device_printf(parent, "device_identify failed\n"); 350 return_VOID; 351 } 352} 353 354/* 355 * Fetch some descriptive data from ACPI to put in our attach message. 356 */ 357static int 358acpi_probe(device_t dev) 359{ 360 ACPI_TABLE_RSDP *rsdp; 361 ACPI_TABLE_HEADER *rsdt; 362 ACPI_PHYSICAL_ADDRESS paddr; 363 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 364 struct sbuf sb; 365 366 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 367 368 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 369 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 370 device_printf(dev, "probe failed, other PM system enabled.\n"); 371 return_VALUE (ENXIO); 372 } 373 374 if ((paddr = AcpiOsGetRootPointer()) == 0 || 375 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 376 return_VALUE (ENXIO); 377 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 378 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 379 else 380 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 381 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 382 383 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 384 return_VALUE (ENXIO); 385 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 386 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 387 sbuf_trim(&sb); 388 sbuf_putc(&sb, ' '); 389 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 390 sbuf_trim(&sb); 391 sbuf_finish(&sb); 392 device_set_desc_copy(dev, sbuf_data(&sb)); 393 sbuf_delete(&sb); 394 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 395 396 return_VALUE (0); 397} 398 399static int 400acpi_attach(device_t dev) 401{ 402 struct acpi_softc *sc; 403 ACPI_TABLE_FACS *facs; 404 ACPI_STATUS status; 405 int error, state; 406 UINT32 flags; 407 UINT8 TypeA, TypeB; 408 char *env; 409 410 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 411 412 sc = device_get_softc(dev); 413 sc->acpi_dev = dev; 414 callout_init(&sc->susp_force_to, TRUE); 415 416 error = ENXIO; 417 418 /* Initialize resource manager. */ 419 acpi_rman_io.rm_type = RMAN_ARRAY; 420 acpi_rman_io.rm_start = 0; 421 acpi_rman_io.rm_end = 0xffff; 422 acpi_rman_io.rm_descr = "ACPI I/O ports"; 423 if (rman_init(&acpi_rman_io) != 0) 424 panic("acpi rman_init IO ports failed"); 425 acpi_rman_mem.rm_type = RMAN_ARRAY; 426 acpi_rman_mem.rm_start = 0; 427 acpi_rman_mem.rm_end = ~0ul; 428 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 429 if (rman_init(&acpi_rman_mem) != 0) 430 panic("acpi rman_init memory failed"); 431 432 /* Initialise the ACPI mutex */ 433 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 434 435 /* 436 * Set the globals from our tunables. This is needed because ACPI-CA 437 * uses UINT8 for some values and we have no tunable_byte. 438 */ 439 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 440 AcpiGbl_EnableInterpreterSlack = TRUE; 441 442 /* Start up the ACPI CA subsystem. */ 443 status = AcpiInitializeSubsystem(); 444 if (ACPI_FAILURE(status)) { 445 device_printf(dev, "Could not initialize Subsystem: %s\n", 446 AcpiFormatException(status)); 447 goto out; 448 } 449 450 /* Load ACPI name space. */ 451 status = AcpiLoadTables(); 452 if (ACPI_FAILURE(status)) { 453 device_printf(dev, "Could not load Namespace: %s\n", 454 AcpiFormatException(status)); 455 goto out; 456 } 457 458 /* Install the default address space handlers. */ 459 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 460 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 461 if (ACPI_FAILURE(status)) { 462 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 463 AcpiFormatException(status)); 464 goto out; 465 } 466 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 467 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 468 if (ACPI_FAILURE(status)) { 469 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 470 AcpiFormatException(status)); 471 goto out; 472 } 473 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 474 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 475 if (ACPI_FAILURE(status)) { 476 device_printf(dev, "could not initialise PciConfig handler: %s\n", 477 AcpiFormatException(status)); 478 goto out; 479 } 480 481 /* 482 * Note that some systems (specifically, those with namespace evaluation 483 * issues that require the avoidance of parts of the namespace) must 484 * avoid running _INI and _STA on everything, as well as dodging the final 485 * object init pass. 486 * 487 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 488 * 489 * XXX We should arrange for the object init pass after we have attached 490 * all our child devices, but on many systems it works here. 491 */ 492 flags = 0; 493 if (testenv("debug.acpi.avoid")) 494 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 495 496 /* Bring the hardware and basic handlers online. */ 497 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 498 device_printf(dev, "Could not enable ACPI: %s\n", 499 AcpiFormatException(status)); 500 goto out; 501 } 502 503 /* 504 * Call the ECDT probe function to provide EC functionality before 505 * the namespace has been evaluated. 506 * 507 * XXX This happens before the sysresource devices have been probed and 508 * attached so its resources come from nexus0. In practice, this isn't 509 * a problem but should be addressed eventually. 510 */ 511 acpi_ec_ecdt_probe(dev); 512 acpi_hpet_table_probe(dev); 513 514 /* Bring device objects and regions online. */ 515 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 516 device_printf(dev, "Could not initialize ACPI objects: %s\n", 517 AcpiFormatException(status)); 518 goto out; 519 } 520 521 /* 522 * Setup our sysctl tree. 523 * 524 * XXX: This doesn't check to make sure that none of these fail. 525 */ 526 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 527 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 528 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 529 device_get_name(dev), CTLFLAG_RD, 0, ""); 530 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 531 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 532 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 533 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 534 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 535 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 536 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 537 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 538 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 539 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 540 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 541 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 542 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 543 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 544 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 545 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 546 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 547 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 548 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 549 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 550 "sleep delay"); 551 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 552 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 553 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 554 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 555 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 556 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 557 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 558 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 559 OID_AUTO, "handle_reboot", CTLFLAG_RW, 560 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 561 562 /* 563 * Default to 1 second before sleeping to give some machines time to 564 * stabilize. 565 */ 566 sc->acpi_sleep_delay = 1; 567 if (bootverbose) 568 sc->acpi_verbose = 1; 569 if ((env = getenv("hw.acpi.verbose")) != NULL) { 570 if (strcmp(env, "0") != 0) 571 sc->acpi_verbose = 1; 572 freeenv(env); 573 } 574 575 /* Only enable S4BIOS by default if the FACS says it is available. */ 576 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 577 if (ACPI_FAILURE(status)) { 578 device_printf(dev, "couldn't get FACS: %s\n", 579 AcpiFormatException(status)); 580 error = ENXIO; 581 goto out; 582 } 583 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 584 sc->acpi_s4bios = 1; 585 586 /* 587 * Dispatch the default sleep state to devices. The lid switch is set 588 * to NONE by default to avoid surprising users. 589 */ 590 sc->acpi_power_button_sx = ACPI_STATE_S5; 591 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 592 sc->acpi_standby_sx = ACPI_STATE_S1; 593 sc->acpi_suspend_sx = ACPI_STATE_S3; 594 595 /* Pick the first valid sleep state for the sleep button default. */ 596 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 597 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++) 598 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 599 sc->acpi_sleep_button_sx = state; 600 break; 601 } 602 603 acpi_enable_fixed_events(sc); 604 605 /* 606 * Scan the namespace and attach/initialise children. 607 */ 608 609 /* Register our shutdown handler. */ 610 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 611 SHUTDOWN_PRI_LAST); 612 613 /* 614 * Register our acpi event handlers. 615 * XXX should be configurable eg. via userland policy manager. 616 */ 617 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 618 sc, ACPI_EVENT_PRI_LAST); 619 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 620 sc, ACPI_EVENT_PRI_LAST); 621 622 /* Flag our initial states. */ 623 sc->acpi_enabled = 1; 624 sc->acpi_sstate = ACPI_STATE_S0; 625 sc->acpi_sleep_disabled = 0; 626 627 /* Create the control device */ 628 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 629 "acpi"); 630 sc->acpi_dev_t->si_drv1 = sc; 631 632 if ((error = acpi_machdep_init(dev))) 633 goto out; 634 635 /* Register ACPI again to pass the correct argument of pm_func. */ 636 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 637 638 if (!acpi_disabled("bus")) 639 acpi_probe_children(dev); 640 641 error = 0; 642 643 out: 644 return_VALUE (error); 645} 646 647static int 648acpi_suspend(device_t dev) 649{ 650 device_t child, *devlist; 651 int error, i, numdevs, pstate; 652 653 GIANT_REQUIRED; 654 655 /* First give child devices a chance to suspend. */ 656 error = bus_generic_suspend(dev); 657 if (error) 658 return (error); 659 660 /* 661 * Now, set them into the appropriate power state, usually D3. If the 662 * device has an _SxD method for the next sleep state, use that power 663 * state instead. 664 */ 665 device_get_children(dev, &devlist, &numdevs); 666 for (i = 0; i < numdevs; i++) { 667 /* If the device is not attached, we've powered it down elsewhere. */ 668 child = devlist[i]; 669 if (!device_is_attached(child)) 670 continue; 671 672 /* 673 * Default to D3 for all sleep states. The _SxD method is optional 674 * so set the powerstate even if it's absent. 675 */ 676 pstate = PCI_POWERSTATE_D3; 677 error = acpi_device_pwr_for_sleep(device_get_parent(child), 678 child, &pstate); 679 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 680 pci_set_powerstate(child, pstate); 681 } 682 free(devlist, M_TEMP); 683 error = 0; 684 685 return (error); 686} 687 688static int 689acpi_resume(device_t dev) 690{ 691 ACPI_HANDLE handle; 692 int i, numdevs; 693 device_t child, *devlist; 694 695 GIANT_REQUIRED; 696 697 /* 698 * Put all devices in D0 before resuming them. Call _S0D on each one 699 * since some systems expect this. 700 */ 701 device_get_children(dev, &devlist, &numdevs); 702 for (i = 0; i < numdevs; i++) { 703 child = devlist[i]; 704 handle = acpi_get_handle(child); 705 if (handle) 706 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 707 if (device_is_attached(child) && acpi_do_powerstate) 708 pci_set_powerstate(child, PCI_POWERSTATE_D0); 709 } 710 free(devlist, M_TEMP); 711 712 return (bus_generic_resume(dev)); 713} 714 715static int 716acpi_shutdown(device_t dev) 717{ 718 719 GIANT_REQUIRED; 720 721 /* Allow children to shutdown first. */ 722 bus_generic_shutdown(dev); 723 724 /* 725 * Enable any GPEs that are able to power-on the system (i.e., RTC). 726 * Also, disable any that are not valid for this state (most). 727 */ 728 acpi_wake_prep_walk(ACPI_STATE_S5); 729 730 return (0); 731} 732 733/* 734 * Handle a new device being added 735 */ 736static device_t 737acpi_add_child(device_t bus, int order, const char *name, int unit) 738{ 739 struct acpi_device *ad; 740 device_t child; 741 742 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 743 return (NULL); 744 745 resource_list_init(&ad->ad_rl); 746 747 child = device_add_child_ordered(bus, order, name, unit); 748 if (child != NULL) 749 device_set_ivars(child, ad); 750 else 751 free(ad, M_ACPIDEV); 752 return (child); 753} 754 755static int 756acpi_print_child(device_t bus, device_t child) 757{ 758 struct acpi_device *adev = device_get_ivars(child); 759 struct resource_list *rl = &adev->ad_rl; 760 int retval = 0; 761 762 retval += bus_print_child_header(bus, child); 763 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 764 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 765 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 766 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 767 if (device_get_flags(child)) 768 retval += printf(" flags %#x", device_get_flags(child)); 769 retval += bus_print_child_footer(bus, child); 770 771 return (retval); 772} 773 774/* 775 * If this device is an ACPI child but no one claimed it, attempt 776 * to power it off. We'll power it back up when a driver is added. 777 * 778 * XXX Disabled for now since many necessary devices (like fdc and 779 * ATA) don't claim the devices we created for them but still expect 780 * them to be powered up. 781 */ 782static void 783acpi_probe_nomatch(device_t bus, device_t child) 784{ 785 786 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 787} 788 789/* 790 * If a new driver has a chance to probe a child, first power it up. 791 * 792 * XXX Disabled for now (see acpi_probe_nomatch for details). 793 */ 794static void 795acpi_driver_added(device_t dev, driver_t *driver) 796{ 797 device_t child, *devlist; 798 int i, numdevs; 799 800 DEVICE_IDENTIFY(driver, dev); 801 device_get_children(dev, &devlist, &numdevs); 802 for (i = 0; i < numdevs; i++) { 803 child = devlist[i]; 804 if (device_get_state(child) == DS_NOTPRESENT) { 805 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 806 if (device_probe_and_attach(child) != 0) 807 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 808 } 809 } 810 free(devlist, M_TEMP); 811} 812 813/* Location hint for devctl(8) */ 814static int 815acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 816 size_t buflen) 817{ 818 struct acpi_device *dinfo = device_get_ivars(child); 819 820 if (dinfo->ad_handle) 821 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 822 else 823 snprintf(buf, buflen, "unknown"); 824 return (0); 825} 826 827/* PnP information for devctl(8) */ 828static int 829acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 830 size_t buflen) 831{ 832 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 833 ACPI_DEVICE_INFO *adinfo; 834 struct acpi_device *dinfo = device_get_ivars(child); 835 char *end; 836 int error; 837 838 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 839 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 840 if (error) 841 snprintf(buf, buflen, "unknown"); 842 else 843 snprintf(buf, buflen, "_HID=%s _UID=%lu", 844 (adinfo->Valid & ACPI_VALID_HID) ? 845 adinfo->HardwareId.Value : "none", 846 (adinfo->Valid & ACPI_VALID_UID) ? 847 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 848 if (adinfo) 849 AcpiOsFree(adinfo); 850 851 return (0); 852} 853 854/* 855 * Handle per-device ivars 856 */ 857static int 858acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 859{ 860 struct acpi_device *ad; 861 862 if ((ad = device_get_ivars(child)) == NULL) { 863 printf("device has no ivars\n"); 864 return (ENOENT); 865 } 866 867 /* ACPI and ISA compatibility ivars */ 868 switch(index) { 869 case ACPI_IVAR_HANDLE: 870 *(ACPI_HANDLE *)result = ad->ad_handle; 871 break; 872 case ACPI_IVAR_MAGIC: 873 *(uintptr_t *)result = ad->ad_magic; 874 break; 875 case ACPI_IVAR_PRIVATE: 876 *(void **)result = ad->ad_private; 877 break; 878 case ACPI_IVAR_FLAGS: 879 *(int *)result = ad->ad_flags; 880 break; 881 case ISA_IVAR_VENDORID: 882 case ISA_IVAR_SERIAL: 883 case ISA_IVAR_COMPATID: 884 *(int *)result = -1; 885 break; 886 case ISA_IVAR_LOGICALID: 887 *(int *)result = acpi_isa_get_logicalid(child); 888 break; 889 default: 890 return (ENOENT); 891 } 892 893 return (0); 894} 895 896static int 897acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 898{ 899 struct acpi_device *ad; 900 901 if ((ad = device_get_ivars(child)) == NULL) { 902 printf("device has no ivars\n"); 903 return (ENOENT); 904 } 905 906 switch(index) { 907 case ACPI_IVAR_HANDLE: 908 ad->ad_handle = (ACPI_HANDLE)value; 909 break; 910 case ACPI_IVAR_MAGIC: 911 ad->ad_magic = (uintptr_t)value; 912 break; 913 case ACPI_IVAR_PRIVATE: 914 ad->ad_private = (void *)value; 915 break; 916 case ACPI_IVAR_FLAGS: 917 ad->ad_flags = (int)value; 918 break; 919 default: 920 panic("bad ivar write request (%d)", index); 921 return (ENOENT); 922 } 923 924 return (0); 925} 926 927/* 928 * Handle child resource allocation/removal 929 */ 930static struct resource_list * 931acpi_get_rlist(device_t dev, device_t child) 932{ 933 struct acpi_device *ad; 934 935 ad = device_get_ivars(child); 936 return (&ad->ad_rl); 937} 938 939/* 940 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 941 * duplicates, we merge any in the sysresource attach routine. 942 */ 943static int 944acpi_sysres_alloc(device_t dev) 945{ 946 struct resource *res; 947 struct resource_list *rl; 948 struct resource_list_entry *rle; 949 struct rman *rm; 950 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 951 device_t *children; 952 int child_count, i; 953 954 /* 955 * Probe/attach any sysresource devices. This would be unnecessary if we 956 * had multi-pass probe/attach. 957 */ 958 if (device_get_children(dev, &children, &child_count) != 0) 959 return (ENXIO); 960 for (i = 0; i < child_count; i++) { 961 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 962 device_probe_and_attach(children[i]); 963 } 964 free(children, M_TEMP); 965 966 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 967 STAILQ_FOREACH(rle, rl, link) { 968 if (rle->res != NULL) { 969 device_printf(dev, "duplicate resource for %lx\n", rle->start); 970 continue; 971 } 972 973 /* Only memory and IO resources are valid here. */ 974 switch (rle->type) { 975 case SYS_RES_IOPORT: 976 rm = &acpi_rman_io; 977 break; 978 case SYS_RES_MEMORY: 979 rm = &acpi_rman_mem; 980 break; 981 default: 982 continue; 983 } 984 985 /* Pre-allocate resource and add to our rman pool. */ 986 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 987 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 988 if (res != NULL) { 989 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 990 rle->res = res; 991 } else 992 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 993 rle->start, rle->count, rle->type); 994 } 995 return (0); 996} 997 998static struct resource * 999acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 1000 u_long start, u_long end, u_long count, u_int flags) 1001{ 1002 ACPI_RESOURCE ares; 1003 struct acpi_device *ad = device_get_ivars(child); 1004 struct resource_list *rl = &ad->ad_rl; 1005 struct resource_list_entry *rle; 1006 struct resource *res; 1007 struct rman *rm; 1008 1009 res = NULL; 1010 1011 /* We only handle memory and IO resources through rman. */ 1012 switch (type) { 1013 case SYS_RES_IOPORT: 1014 rm = &acpi_rman_io; 1015 break; 1016 case SYS_RES_MEMORY: 1017 rm = &acpi_rman_mem; 1018 break; 1019 default: 1020 rm = NULL; 1021 } 1022 1023 ACPI_SERIAL_BEGIN(acpi); 1024 1025 /* 1026 * If this is an allocation of the "default" range for a given RID, and 1027 * we know what the resources for this device are (i.e., they're on the 1028 * child's resource list), use those start/end values. 1029 */ 1030 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1031 rle = resource_list_find(rl, type, *rid); 1032 if (rle == NULL) 1033 goto out; 1034 start = rle->start; 1035 end = rle->end; 1036 count = rle->count; 1037 } 1038 1039 /* 1040 * If this is an allocation of a specific range, see if we can satisfy 1041 * the request from our system resource regions. If we can't, pass the 1042 * request up to the parent. 1043 */ 1044 if (start + count - 1 == end && rm != NULL) 1045 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1046 child); 1047 if (res == NULL) { 1048 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1049 start, end, count, flags); 1050 } else { 1051 rman_set_rid(res, *rid); 1052 1053 /* If requested, activate the resource using the parent's method. */ 1054 if (flags & RF_ACTIVE) 1055 if (bus_activate_resource(child, type, *rid, res) != 0) { 1056 rman_release_resource(res); 1057 res = NULL; 1058 goto out; 1059 } 1060 } 1061 1062 if (res != NULL && device_get_parent(child) == bus) 1063 switch (type) { 1064 case SYS_RES_IRQ: 1065 /* 1066 * Since bus_config_intr() takes immediate effect, we cannot 1067 * configure the interrupt associated with a device when we 1068 * parse the resources but have to defer it until a driver 1069 * actually allocates the interrupt via bus_alloc_resource(). 1070 * 1071 * XXX: Should we handle the lookup failing? 1072 */ 1073 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1074 acpi_config_intr(child, &ares); 1075 break; 1076 } 1077 1078out: 1079 ACPI_SERIAL_END(acpi); 1080 return (res); 1081} 1082 1083static int 1084acpi_release_resource(device_t bus, device_t child, int type, int rid, 1085 struct resource *r) 1086{ 1087 struct rman *rm; 1088 int ret; 1089 1090 /* We only handle memory and IO resources through rman. */ 1091 switch (type) { 1092 case SYS_RES_IOPORT: 1093 rm = &acpi_rman_io; 1094 break; 1095 case SYS_RES_MEMORY: 1096 rm = &acpi_rman_mem; 1097 break; 1098 default: 1099 rm = NULL; 1100 } 1101 1102 ACPI_SERIAL_BEGIN(acpi); 1103 1104 /* 1105 * If this resource belongs to one of our internal managers, 1106 * deactivate it and release it to the local pool. If it doesn't, 1107 * pass this request up to the parent. 1108 */ 1109 if (rm != NULL && rman_is_region_manager(r, rm)) { 1110 if (rman_get_flags(r) & RF_ACTIVE) { 1111 ret = bus_deactivate_resource(child, type, rid, r); 1112 if (ret != 0) 1113 goto out; 1114 } 1115 ret = rman_release_resource(r); 1116 } else 1117 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1118 1119out: 1120 ACPI_SERIAL_END(acpi); 1121 return (ret); 1122} 1123 1124static void 1125acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1126{ 1127 struct resource_list *rl; 1128 1129 rl = acpi_get_rlist(bus, child); 1130 resource_list_delete(rl, type, rid); 1131} 1132 1133/* Allocate an IO port or memory resource, given its GAS. */ 1134int 1135acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1136 struct resource **res, u_int flags) 1137{ 1138 int error, res_type; 1139 1140 error = ENOMEM; 1141 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1142 return (EINVAL); 1143 1144 /* We only support memory and IO spaces. */ 1145 switch (gas->SpaceId) { 1146 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1147 res_type = SYS_RES_MEMORY; 1148 break; 1149 case ACPI_ADR_SPACE_SYSTEM_IO: 1150 res_type = SYS_RES_IOPORT; 1151 break; 1152 default: 1153 return (EOPNOTSUPP); 1154 } 1155 1156 /* 1157 * If the register width is less than 8, assume the BIOS author means 1158 * it is a bit field and just allocate a byte. 1159 */ 1160 if (gas->BitWidth && gas->BitWidth < 8) 1161 gas->BitWidth = 8; 1162 1163 /* Validate the address after we're sure we support the space. */ 1164 if (gas->Address == 0 || gas->BitWidth == 0) 1165 return (EINVAL); 1166 1167 bus_set_resource(dev, res_type, *rid, gas->Address, 1168 gas->BitWidth / 8); 1169 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1170 if (*res != NULL) { 1171 *type = res_type; 1172 error = 0; 1173 } else 1174 bus_delete_resource(dev, res_type, *rid); 1175 1176 return (error); 1177} 1178 1179/* Probe _HID and _CID for compatible ISA PNP ids. */ 1180static uint32_t 1181acpi_isa_get_logicalid(device_t dev) 1182{ 1183 ACPI_DEVICE_INFO *devinfo; 1184 ACPI_BUFFER buf; 1185 ACPI_HANDLE h; 1186 ACPI_STATUS error; 1187 u_int32_t pnpid; 1188 1189 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1190 1191 pnpid = 0; 1192 buf.Pointer = NULL; 1193 buf.Length = ACPI_ALLOCATE_BUFFER; 1194 1195 /* Fetch and validate the HID. */ 1196 if ((h = acpi_get_handle(dev)) == NULL) 1197 goto out; 1198 error = AcpiGetObjectInfo(h, &buf); 1199 if (ACPI_FAILURE(error)) 1200 goto out; 1201 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1202 1203 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1204 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1205 1206out: 1207 if (buf.Pointer != NULL) 1208 AcpiOsFree(buf.Pointer); 1209 return_VALUE (pnpid); 1210} 1211 1212static int 1213acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1214{ 1215 ACPI_DEVICE_INFO *devinfo; 1216 ACPI_BUFFER buf; 1217 ACPI_HANDLE h; 1218 ACPI_STATUS error; 1219 uint32_t *pnpid; 1220 int valid, i; 1221 1222 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1223 1224 pnpid = cids; 1225 valid = 0; 1226 buf.Pointer = NULL; 1227 buf.Length = ACPI_ALLOCATE_BUFFER; 1228 1229 /* Fetch and validate the CID */ 1230 if ((h = acpi_get_handle(dev)) == NULL) 1231 goto out; 1232 error = AcpiGetObjectInfo(h, &buf); 1233 if (ACPI_FAILURE(error)) 1234 goto out; 1235 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1236 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1237 goto out; 1238 1239 if (devinfo->CompatibilityId.Count < count) 1240 count = devinfo->CompatibilityId.Count; 1241 for (i = 0; i < count; i++) { 1242 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1243 continue; 1244 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1245 valid++; 1246 } 1247 1248out: 1249 if (buf.Pointer != NULL) 1250 AcpiOsFree(buf.Pointer); 1251 return_VALUE (valid); 1252} 1253 1254static char * 1255acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1256{ 1257 ACPI_HANDLE h; 1258 int i; 1259 1260 h = acpi_get_handle(dev); 1261 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1262 return (NULL); 1263 1264 /* Try to match one of the array of IDs with a HID or CID. */ 1265 for (i = 0; ids[i] != NULL; i++) { 1266 if (acpi_MatchHid(h, ids[i])) 1267 return (ids[i]); 1268 } 1269 return (NULL); 1270} 1271 1272static ACPI_STATUS 1273acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1274 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1275{ 1276 ACPI_HANDLE h; 1277 1278 if (dev == NULL) 1279 h = ACPI_ROOT_OBJECT; 1280 else if ((h = acpi_get_handle(dev)) == NULL) 1281 return (AE_BAD_PARAMETER); 1282 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1283} 1284 1285static int 1286acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1287{ 1288 struct acpi_softc *sc; 1289 ACPI_HANDLE handle; 1290 ACPI_STATUS status; 1291 char sxd[8]; 1292 int error; 1293 1294 sc = device_get_softc(bus); 1295 handle = acpi_get_handle(dev); 1296 1297 /* 1298 * XXX If we find these devices, don't try to power them down. 1299 * The serial and IRDA ports on my T23 hang the system when 1300 * set to D3 and it appears that such legacy devices may 1301 * need special handling in their drivers. 1302 */ 1303 if (handle == NULL || 1304 acpi_MatchHid(handle, "PNP0500") || 1305 acpi_MatchHid(handle, "PNP0501") || 1306 acpi_MatchHid(handle, "PNP0502") || 1307 acpi_MatchHid(handle, "PNP0510") || 1308 acpi_MatchHid(handle, "PNP0511")) 1309 return (ENXIO); 1310 1311 /* 1312 * Override next state with the value from _SxD, if present. If no 1313 * dstate argument was provided, don't fetch the return value. 1314 */ 1315 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1316 if (dstate) 1317 status = acpi_GetInteger(handle, sxd, dstate); 1318 else 1319 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1320 1321 switch (status) { 1322 case AE_OK: 1323 error = 0; 1324 break; 1325 case AE_NOT_FOUND: 1326 error = ESRCH; 1327 break; 1328 default: 1329 error = ENXIO; 1330 break; 1331 } 1332 1333 return (error); 1334} 1335 1336/* Callback arg for our implementation of walking the namespace. */ 1337struct acpi_device_scan_ctx { 1338 acpi_scan_cb_t user_fn; 1339 void *arg; 1340 ACPI_HANDLE parent; 1341}; 1342 1343static ACPI_STATUS 1344acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1345{ 1346 struct acpi_device_scan_ctx *ctx; 1347 device_t dev, old_dev; 1348 ACPI_STATUS status; 1349 ACPI_OBJECT_TYPE type; 1350 1351 /* 1352 * Skip this device if we think we'll have trouble with it or it is 1353 * the parent where the scan began. 1354 */ 1355 ctx = (struct acpi_device_scan_ctx *)arg; 1356 if (acpi_avoid(h) || h == ctx->parent) 1357 return (AE_OK); 1358 1359 /* If this is not a valid device type (e.g., a method), skip it. */ 1360 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1361 return (AE_OK); 1362 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1363 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1364 return (AE_OK); 1365 1366 /* 1367 * Call the user function with the current device. If it is unchanged 1368 * afterwards, return. Otherwise, we update the handle to the new dev. 1369 */ 1370 old_dev = acpi_get_device(h); 1371 dev = old_dev; 1372 status = ctx->user_fn(h, &dev, level, ctx->arg); 1373 if (ACPI_FAILURE(status) || old_dev == dev) 1374 return (status); 1375 1376 /* Remove the old child and its connection to the handle. */ 1377 if (old_dev != NULL) { 1378 device_delete_child(device_get_parent(old_dev), old_dev); 1379 AcpiDetachData(h, acpi_fake_objhandler); 1380 } 1381 1382 /* Recreate the handle association if the user created a device. */ 1383 if (dev != NULL) 1384 AcpiAttachData(h, acpi_fake_objhandler, dev); 1385 1386 return (AE_OK); 1387} 1388 1389static ACPI_STATUS 1390acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1391 acpi_scan_cb_t user_fn, void *arg) 1392{ 1393 ACPI_HANDLE h; 1394 struct acpi_device_scan_ctx ctx; 1395 1396 if (acpi_disabled("children")) 1397 return (AE_OK); 1398 1399 if (dev == NULL) 1400 h = ACPI_ROOT_OBJECT; 1401 else if ((h = acpi_get_handle(dev)) == NULL) 1402 return (AE_BAD_PARAMETER); 1403 ctx.user_fn = user_fn; 1404 ctx.arg = arg; 1405 ctx.parent = h; 1406 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1407 acpi_device_scan_cb, &ctx, NULL)); 1408} 1409 1410/* 1411 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1412 * device power states since it's close enough to ACPI. 1413 */ 1414static int 1415acpi_set_powerstate_method(device_t bus, device_t child, int state) 1416{ 1417 ACPI_HANDLE h; 1418 ACPI_STATUS status; 1419 int error; 1420 1421 error = 0; 1422 h = acpi_get_handle(child); 1423 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1424 return (EINVAL); 1425 if (h == NULL) 1426 return (0); 1427 1428 /* Ignore errors if the power methods aren't present. */ 1429 status = acpi_pwr_switch_consumer(h, state); 1430 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1431 && status != AE_BAD_PARAMETER) 1432 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1433 state, acpi_name(h), AcpiFormatException(status)); 1434 1435 return (error); 1436} 1437 1438static int 1439acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1440{ 1441 int result, cid_count, i; 1442 uint32_t lid, cids[8]; 1443 1444 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1445 1446 /* 1447 * ISA-style drivers attached to ACPI may persist and 1448 * probe manually if we return ENOENT. We never want 1449 * that to happen, so don't ever return it. 1450 */ 1451 result = ENXIO; 1452 1453 /* Scan the supplied IDs for a match */ 1454 lid = acpi_isa_get_logicalid(child); 1455 cid_count = acpi_isa_get_compatid(child, cids, 8); 1456 while (ids && ids->ip_id) { 1457 if (lid == ids->ip_id) { 1458 result = 0; 1459 goto out; 1460 } 1461 for (i = 0; i < cid_count; i++) { 1462 if (cids[i] == ids->ip_id) { 1463 result = 0; 1464 goto out; 1465 } 1466 } 1467 ids++; 1468 } 1469 1470 out: 1471 if (result == 0 && ids->ip_desc) 1472 device_set_desc(child, ids->ip_desc); 1473 1474 return_VALUE (result); 1475} 1476 1477/* 1478 * Scan all of the ACPI namespace and attach child devices. 1479 * 1480 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1481 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1482 * However, in violation of the spec, some systems place their PCI link 1483 * devices in \, so we have to walk the whole namespace. We check the 1484 * type of namespace nodes, so this should be ok. 1485 */ 1486static void 1487acpi_probe_children(device_t bus) 1488{ 1489 1490 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1491 1492 /* 1493 * Scan the namespace and insert placeholders for all the devices that 1494 * we find. We also probe/attach any early devices. 1495 * 1496 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1497 * we want to create nodes for all devices, not just those that are 1498 * currently present. (This assumes that we don't want to create/remove 1499 * devices as they appear, which might be smarter.) 1500 */ 1501 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1502 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1503 bus, NULL); 1504 1505 /* Pre-allocate resources for our rman from any sysresource devices. */ 1506 acpi_sysres_alloc(bus); 1507 1508 /* Create any static children by calling device identify methods. */ 1509 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1510 bus_generic_probe(bus); 1511 1512 /* Probe/attach all children, created staticly and from the namespace. */ 1513 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1514 bus_generic_attach(bus); 1515 1516 /* 1517 * Some of these children may have attached others as part of their attach 1518 * process (eg. the root PCI bus driver), so rescan. 1519 */ 1520 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1521 bus_generic_attach(bus); 1522 1523 /* Attach wake sysctls. */ 1524 acpi_wake_sysctl_walk(bus); 1525 1526 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1527 return_VOID; 1528} 1529 1530/* 1531 * Determine the probe order for a given device and return non-zero if it 1532 * should be attached immediately. 1533 */ 1534static int 1535acpi_probe_order(ACPI_HANDLE handle, int *order) 1536{ 1537 1538 /* 1539 * 1. I/O port and memory system resource holders 1540 * 2. Embedded controllers (to handle early accesses) 1541 * 3. PCI Link Devices 1542 */ 1543 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1544 *order = 1; 1545 else if (acpi_MatchHid(handle, "PNP0C09")) 1546 *order = 2; 1547 else if (acpi_MatchHid(handle, "PNP0C0F")) 1548 *order = 3; 1549 return (0); 1550} 1551 1552/* 1553 * Evaluate a child device and determine whether we might attach a device to 1554 * it. 1555 */ 1556static ACPI_STATUS 1557acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1558{ 1559 ACPI_OBJECT_TYPE type; 1560 ACPI_HANDLE h; 1561 device_t bus, child; 1562 int order; 1563 char *handle_str, **search; 1564 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1565 1566 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1567 1568 /* Skip this device if we think we'll have trouble with it. */ 1569 if (acpi_avoid(handle)) 1570 return_ACPI_STATUS (AE_OK); 1571 1572 bus = (device_t)context; 1573 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1574 switch (type) { 1575 case ACPI_TYPE_DEVICE: 1576 case ACPI_TYPE_PROCESSOR: 1577 case ACPI_TYPE_THERMAL: 1578 case ACPI_TYPE_POWER: 1579 if (acpi_disabled("children")) 1580 break; 1581 1582 /* 1583 * Since we scan from \, be sure to skip system scope objects. 1584 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1585 */ 1586 handle_str = acpi_name(handle); 1587 for (search = scopes; *search != NULL; search++) { 1588 if (strcmp(handle_str, *search) == 0) 1589 break; 1590 } 1591 if (*search != NULL) 1592 break; 1593 1594 /* 1595 * Create a placeholder device for this node. Sort the placeholder 1596 * so that the probe/attach passes will run breadth-first. Orders 1597 * less than 10 are reserved for special objects (i.e., system 1598 * resources). Larger values are used for all other devices. 1599 */ 1600 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1601 order = (level + 1) * 10; 1602 acpi_probe_order(handle, &order); 1603 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1604 if (child == NULL) 1605 break; 1606 1607 /* Associate the handle with the device_t and vice versa. */ 1608 acpi_set_handle(child, handle); 1609 AcpiAttachData(handle, acpi_fake_objhandler, child); 1610 1611 /* 1612 * Check that the device is present. If it's not present, 1613 * leave it disabled (so that we have a device_t attached to 1614 * the handle, but we don't probe it). 1615 * 1616 * XXX PCI link devices sometimes report "present" but not 1617 * "functional" (i.e. if disabled). Go ahead and probe them 1618 * anyway since we may enable them later. 1619 */ 1620 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1621 /* Never disable PCI link devices. */ 1622 if (acpi_MatchHid(handle, "PNP0C0F")) 1623 break; 1624 /* 1625 * Docking stations should remain enabled since the system 1626 * may be undocked at boot. 1627 */ 1628 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1629 break; 1630 1631 device_disable(child); 1632 break; 1633 } 1634 1635 /* 1636 * Get the device's resource settings and attach them. 1637 * Note that if the device has _PRS but no _CRS, we need 1638 * to decide when it's appropriate to try to configure the 1639 * device. Ignore the return value here; it's OK for the 1640 * device not to have any resources. 1641 */ 1642 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1643 break; 1644 } 1645 } 1646 1647 return_ACPI_STATUS (AE_OK); 1648} 1649 1650/* 1651 * AcpiAttachData() requires an object handler but never uses it. This is a 1652 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1653 */ 1654void 1655acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1656{ 1657} 1658 1659static void 1660acpi_shutdown_final(void *arg, int howto) 1661{ 1662 struct acpi_softc *sc; 1663 ACPI_STATUS status; 1664 1665 /* 1666 * XXX Shutdown code should only run on the BSP (cpuid 0). 1667 * Some chipsets do not power off the system correctly if called from 1668 * an AP. 1669 */ 1670 sc = arg; 1671 if ((howto & RB_POWEROFF) != 0) { 1672 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1673 if (ACPI_FAILURE(status)) { 1674 printf("AcpiEnterSleepStatePrep failed - %s\n", 1675 AcpiFormatException(status)); 1676 return; 1677 } 1678 printf("Powering system off using ACPI\n"); 1679 ACPI_DISABLE_IRQS(); 1680 status = AcpiEnterSleepState(ACPI_STATE_S5); 1681 if (ACPI_FAILURE(status)) { 1682 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1683 } else { 1684 DELAY(1000000); 1685 printf("ACPI power-off failed - timeout\n"); 1686 } 1687 } else if ((howto & RB_HALT) == 0 && 1688 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1689 sc->acpi_handle_reboot) { 1690 /* Reboot using the reset register. */ 1691 status = AcpiHwLowLevelWrite( 1692 AcpiGbl_FADT.ResetRegister.BitWidth, 1693 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1694 if (ACPI_FAILURE(status)) { 1695 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1696 } else { 1697 DELAY(1000000); 1698 printf("ACPI reset failed - timeout\n"); 1699 } 1700 } else if (sc->acpi_do_disable && panicstr == NULL) { 1701 /* 1702 * Only disable ACPI if the user requested. On some systems, writing 1703 * the disable value to SMI_CMD hangs the system. 1704 */ 1705 printf("Shutting down ACPI\n"); 1706 AcpiTerminate(); 1707 } 1708} 1709 1710static void 1711acpi_enable_fixed_events(struct acpi_softc *sc) 1712{ 1713 static int first_time = 1; 1714 1715 /* Enable and clear fixed events and install handlers. */ 1716 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1717 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1718 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1719 acpi_event_power_button_sleep, sc); 1720 if (first_time) 1721 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1722 } 1723 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1724 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1725 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1726 acpi_event_sleep_button_sleep, sc); 1727 if (first_time) 1728 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1729 } 1730 1731 first_time = 0; 1732} 1733 1734/* 1735 * Returns true if the device is actually present and should 1736 * be attached to. This requires the present, enabled, UI-visible 1737 * and diagnostics-passed bits to be set. 1738 */ 1739BOOLEAN 1740acpi_DeviceIsPresent(device_t dev) 1741{ 1742 ACPI_DEVICE_INFO *devinfo; 1743 ACPI_HANDLE h; 1744 ACPI_BUFFER buf; 1745 ACPI_STATUS error; 1746 int ret; 1747 1748 ret = FALSE; 1749 if ((h = acpi_get_handle(dev)) == NULL) 1750 return (FALSE); 1751 buf.Pointer = NULL; 1752 buf.Length = ACPI_ALLOCATE_BUFFER; 1753 error = AcpiGetObjectInfo(h, &buf); 1754 if (ACPI_FAILURE(error)) 1755 return (FALSE); 1756 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1757 1758 /* If no _STA method, must be present */ 1759 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1760 ret = TRUE; 1761 1762 /* Return true for 'present' and 'functioning' */ 1763 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1764 ret = TRUE; 1765 1766 AcpiOsFree(buf.Pointer); 1767 return (ret); 1768} 1769 1770/* 1771 * Returns true if the battery is actually present and inserted. 1772 */ 1773BOOLEAN 1774acpi_BatteryIsPresent(device_t dev) 1775{ 1776 ACPI_DEVICE_INFO *devinfo; 1777 ACPI_HANDLE h; 1778 ACPI_BUFFER buf; 1779 ACPI_STATUS error; 1780 int ret; 1781 1782 ret = FALSE; 1783 if ((h = acpi_get_handle(dev)) == NULL) 1784 return (FALSE); 1785 buf.Pointer = NULL; 1786 buf.Length = ACPI_ALLOCATE_BUFFER; 1787 error = AcpiGetObjectInfo(h, &buf); 1788 if (ACPI_FAILURE(error)) 1789 return (FALSE); 1790 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1791 1792 /* If no _STA method, must be present */ 1793 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1794 ret = TRUE; 1795 1796 /* Return true for 'present', 'battery present', and 'functioning' */ 1797 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1798 ret = TRUE; 1799 1800 AcpiOsFree(buf.Pointer); 1801 return (ret); 1802} 1803 1804/* 1805 * Match a HID string against a handle 1806 */ 1807static BOOLEAN 1808acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1809{ 1810 ACPI_DEVICE_INFO *devinfo; 1811 ACPI_BUFFER buf; 1812 ACPI_STATUS error; 1813 int ret, i; 1814 1815 ret = FALSE; 1816 if (hid == NULL || h == NULL) 1817 return (ret); 1818 buf.Pointer = NULL; 1819 buf.Length = ACPI_ALLOCATE_BUFFER; 1820 error = AcpiGetObjectInfo(h, &buf); 1821 if (ACPI_FAILURE(error)) 1822 return (ret); 1823 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1824 1825 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1826 strcmp(hid, devinfo->HardwareId.Value) == 0) 1827 ret = TRUE; 1828 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1829 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1830 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1831 ret = TRUE; 1832 break; 1833 } 1834 } 1835 } 1836 1837 AcpiOsFree(buf.Pointer); 1838 return (ret); 1839} 1840 1841/* 1842 * Return the handle of a named object within our scope, ie. that of (parent) 1843 * or one if its parents. 1844 */ 1845ACPI_STATUS 1846acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1847{ 1848 ACPI_HANDLE r; 1849 ACPI_STATUS status; 1850 1851 /* Walk back up the tree to the root */ 1852 for (;;) { 1853 status = AcpiGetHandle(parent, path, &r); 1854 if (ACPI_SUCCESS(status)) { 1855 *result = r; 1856 return (AE_OK); 1857 } 1858 /* XXX Return error here? */ 1859 if (status != AE_NOT_FOUND) 1860 return (AE_OK); 1861 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1862 return (AE_NOT_FOUND); 1863 parent = r; 1864 } 1865} 1866 1867/* Find the difference between two PM tick counts. */ 1868uint32_t 1869acpi_TimerDelta(uint32_t end, uint32_t start) 1870{ 1871 uint32_t delta; 1872 1873 if (end >= start) 1874 delta = end - start; 1875 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1876 delta = ((0xFFFFFFFF - start) + end + 1); 1877 else 1878 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1879 return (delta); 1880} 1881 1882/* 1883 * Allocate a buffer with a preset data size. 1884 */ 1885ACPI_BUFFER * 1886acpi_AllocBuffer(int size) 1887{ 1888 ACPI_BUFFER *buf; 1889 1890 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1891 return (NULL); 1892 buf->Length = size; 1893 buf->Pointer = (void *)(buf + 1); 1894 return (buf); 1895} 1896 1897ACPI_STATUS 1898acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1899{ 1900 ACPI_OBJECT arg1; 1901 ACPI_OBJECT_LIST args; 1902 1903 arg1.Type = ACPI_TYPE_INTEGER; 1904 arg1.Integer.Value = number; 1905 args.Count = 1; 1906 args.Pointer = &arg1; 1907 1908 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1909} 1910 1911/* 1912 * Evaluate a path that should return an integer. 1913 */ 1914ACPI_STATUS 1915acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1916{ 1917 ACPI_STATUS status; 1918 ACPI_BUFFER buf; 1919 ACPI_OBJECT param; 1920 1921 if (handle == NULL) 1922 handle = ACPI_ROOT_OBJECT; 1923 1924 /* 1925 * Assume that what we've been pointed at is an Integer object, or 1926 * a method that will return an Integer. 1927 */ 1928 buf.Pointer = ¶m; 1929 buf.Length = sizeof(param); 1930 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1931 if (ACPI_SUCCESS(status)) { 1932 if (param.Type == ACPI_TYPE_INTEGER) 1933 *number = param.Integer.Value; 1934 else 1935 status = AE_TYPE; 1936 } 1937 1938 /* 1939 * In some applications, a method that's expected to return an Integer 1940 * may instead return a Buffer (probably to simplify some internal 1941 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1942 * convert it into an Integer as best we can. 1943 * 1944 * This is a hack. 1945 */ 1946 if (status == AE_BUFFER_OVERFLOW) { 1947 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1948 status = AE_NO_MEMORY; 1949 } else { 1950 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1951 if (ACPI_SUCCESS(status)) 1952 status = acpi_ConvertBufferToInteger(&buf, number); 1953 AcpiOsFree(buf.Pointer); 1954 } 1955 } 1956 return (status); 1957} 1958 1959ACPI_STATUS 1960acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1961{ 1962 ACPI_OBJECT *p; 1963 UINT8 *val; 1964 int i; 1965 1966 p = (ACPI_OBJECT *)bufp->Pointer; 1967 if (p->Type == ACPI_TYPE_INTEGER) { 1968 *number = p->Integer.Value; 1969 return (AE_OK); 1970 } 1971 if (p->Type != ACPI_TYPE_BUFFER) 1972 return (AE_TYPE); 1973 if (p->Buffer.Length > sizeof(int)) 1974 return (AE_BAD_DATA); 1975 1976 *number = 0; 1977 val = p->Buffer.Pointer; 1978 for (i = 0; i < p->Buffer.Length; i++) 1979 *number += val[i] << (i * 8); 1980 return (AE_OK); 1981} 1982 1983/* 1984 * Iterate over the elements of an a package object, calling the supplied 1985 * function for each element. 1986 * 1987 * XXX possible enhancement might be to abort traversal on error. 1988 */ 1989ACPI_STATUS 1990acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1991 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1992{ 1993 ACPI_OBJECT *comp; 1994 int i; 1995 1996 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1997 return (AE_BAD_PARAMETER); 1998 1999 /* Iterate over components */ 2000 i = 0; 2001 comp = pkg->Package.Elements; 2002 for (; i < pkg->Package.Count; i++, comp++) 2003 func(comp, arg); 2004 2005 return (AE_OK); 2006} 2007 2008/* 2009 * Find the (index)th resource object in a set. 2010 */ 2011ACPI_STATUS 2012acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2013{ 2014 ACPI_RESOURCE *rp; 2015 int i; 2016 2017 rp = (ACPI_RESOURCE *)buf->Pointer; 2018 i = index; 2019 while (i-- > 0) { 2020 /* Range check */ 2021 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2022 return (AE_BAD_PARAMETER); 2023 2024 /* Check for terminator */ 2025 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2026 return (AE_NOT_FOUND); 2027 rp = ACPI_NEXT_RESOURCE(rp); 2028 } 2029 if (resp != NULL) 2030 *resp = rp; 2031 2032 return (AE_OK); 2033} 2034 2035/* 2036 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2037 * 2038 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2039 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2040 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2041 * resources. 2042 */ 2043#define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2044 2045ACPI_STATUS 2046acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2047{ 2048 ACPI_RESOURCE *rp; 2049 void *newp; 2050 2051 /* Initialise the buffer if necessary. */ 2052 if (buf->Pointer == NULL) { 2053 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2054 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2055 return (AE_NO_MEMORY); 2056 rp = (ACPI_RESOURCE *)buf->Pointer; 2057 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2058 rp->Length = 0; 2059 } 2060 if (res == NULL) 2061 return (AE_OK); 2062 2063 /* 2064 * Scan the current buffer looking for the terminator. 2065 * This will either find the terminator or hit the end 2066 * of the buffer and return an error. 2067 */ 2068 rp = (ACPI_RESOURCE *)buf->Pointer; 2069 for (;;) { 2070 /* Range check, don't go outside the buffer */ 2071 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2072 return (AE_BAD_PARAMETER); 2073 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2074 break; 2075 rp = ACPI_NEXT_RESOURCE(rp); 2076 } 2077 2078 /* 2079 * Check the size of the buffer and expand if required. 2080 * 2081 * Required size is: 2082 * size of existing resources before terminator + 2083 * size of new resource and header + 2084 * size of terminator. 2085 * 2086 * Note that this loop should really only run once, unless 2087 * for some reason we are stuffing a *really* huge resource. 2088 */ 2089 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2090 res->Length + ACPI_RS_SIZE_NO_DATA + 2091 ACPI_RS_SIZE_MIN) >= buf->Length) { 2092 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2093 return (AE_NO_MEMORY); 2094 bcopy(buf->Pointer, newp, buf->Length); 2095 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2096 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2097 AcpiOsFree(buf->Pointer); 2098 buf->Pointer = newp; 2099 buf->Length += buf->Length; 2100 } 2101 2102 /* Insert the new resource. */ 2103 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2104 2105 /* And add the terminator. */ 2106 rp = ACPI_NEXT_RESOURCE(rp); 2107 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2108 rp->Length = 0; 2109 2110 return (AE_OK); 2111} 2112 2113/* 2114 * Set interrupt model. 2115 */ 2116ACPI_STATUS 2117acpi_SetIntrModel(int model) 2118{ 2119 2120 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2121} 2122 2123/* 2124 * DEPRECATED. This interface has serious deficiencies and will be 2125 * removed. 2126 * 2127 * Immediately enter the sleep state. In the old model, acpiconf(8) ran 2128 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this. 2129 */ 2130ACPI_STATUS 2131acpi_SetSleepState(struct acpi_softc *sc, int state) 2132{ 2133 static int once; 2134 2135 if (!once) { 2136 printf( 2137"warning: acpi_SetSleepState() deprecated, need to update your software\n"); 2138 once = 1; 2139 } 2140 return (acpi_EnterSleepState(sc, state)); 2141} 2142 2143static void 2144acpi_sleep_force(void *arg) 2145{ 2146 struct acpi_softc *sc; 2147 2148 printf("acpi: suspend request timed out, forcing sleep now\n"); 2149 sc = arg; 2150 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2151 printf("acpi: force sleep state S%d failed\n", sc->acpi_next_sstate); 2152} 2153 2154/* 2155 * Request that the system enter the given suspend state. All /dev/apm 2156 * devices and devd(8) will be notified. Userland then has a chance to 2157 * save state and acknowledge the request. The system sleeps once all 2158 * acks are in. 2159 */ 2160int 2161acpi_ReqSleepState(struct acpi_softc *sc, int state) 2162{ 2163 struct apm_clone_data *clone; 2164 2165 if (state < ACPI_STATE_S1 || state > ACPI_STATE_S5) 2166 return (EINVAL); 2167 2168 /* S5 (soft-off) should be entered directly with no waiting. */ 2169 if (state == ACPI_STATE_S5) { 2170 if (ACPI_SUCCESS(acpi_EnterSleepState(sc, state))) 2171 return (0); 2172 else 2173 return (ENXIO); 2174 } 2175 2176#if !defined(__i386__) 2177 /* This platform does not support acpi suspend/resume. */ 2178 return (EOPNOTSUPP); 2179#endif 2180 2181 /* If a suspend request is already in progress, just return. */ 2182 ACPI_LOCK(acpi); 2183 if (sc->acpi_next_sstate != 0) { 2184 ACPI_UNLOCK(acpi); 2185 return (0); 2186 } 2187 2188 /* Record the pending state and notify all apm devices. */ 2189 sc->acpi_next_sstate = state; 2190 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2191 clone->notify_status = APM_EV_NONE; 2192 if ((clone->flags & ACPI_EVF_DEVD) == 0) { 2193 selwakeuppri(&clone->sel_read, PZERO); 2194 KNOTE_UNLOCKED(&clone->sel_read.si_note, 0); 2195 } 2196 } 2197 2198 /* Now notify devd(8) also. */ 2199 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state); 2200 2201 /* 2202 * Set a timeout to fire if userland doesn't ack the suspend request 2203 * in time. This way we still eventually go to sleep if we were 2204 * overheating or running low on battery, even if userland is hung. 2205 * We cancel this timeout once all userland acks are in or the 2206 * suspend request is aborted. 2207 */ 2208 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc); 2209 ACPI_UNLOCK(acpi); 2210 return (0); 2211} 2212 2213/* 2214 * Acknowledge (or reject) a pending sleep state. The caller has 2215 * prepared for suspend and is now ready for it to proceed. If the 2216 * error argument is non-zero, it indicates suspend should be cancelled 2217 * and gives an errno value describing why. Once all votes are in, 2218 * we suspend the system. 2219 */ 2220int 2221acpi_AckSleepState(struct apm_clone_data *clone, int error) 2222{ 2223 struct acpi_softc *sc; 2224 int ret, sleeping; 2225 2226#if !defined(__i386__) 2227 /* This platform does not support acpi suspend/resume. */ 2228 return (EOPNOTSUPP); 2229#endif 2230 2231 /* If no pending sleep state, return an error. */ 2232 ACPI_LOCK(acpi); 2233 sc = clone->acpi_sc; 2234 if (sc->acpi_next_sstate == 0) { 2235 ACPI_UNLOCK(acpi); 2236 return (ENXIO); 2237 } 2238 2239 /* Caller wants to abort suspend process. */ 2240 if (error) { 2241 sc->acpi_next_sstate = 0; 2242 callout_stop(&sc->susp_force_to); 2243 printf("acpi: listener on %s cancelled the pending suspend\n", 2244 devtoname(clone->cdev)); 2245 ACPI_UNLOCK(acpi); 2246 return (0); 2247 } 2248 2249 /* 2250 * Mark this device as acking the suspend request. Then, walk through 2251 * all devices, seeing if they agree yet. We only count devices that 2252 * are writable since read-only devices couldn't ack the request. 2253 */ 2254 clone->notify_status = APM_EV_ACKED; 2255 sleeping = TRUE; 2256 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) { 2257 if ((clone->flags & ACPI_EVF_WRITE) != 0 && 2258 clone->notify_status != APM_EV_ACKED) { 2259 sleeping = FALSE; 2260 break; 2261 } 2262 } 2263 2264 /* If all devices have voted "yes", we will suspend now. */ 2265 if (sleeping) 2266 callout_stop(&sc->susp_force_to); 2267 ACPI_UNLOCK(acpi); 2268 ret = 0; 2269 if (sleeping) { 2270 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate))) 2271 ret = ENODEV; 2272 } 2273 2274 return (ret); 2275} 2276 2277static void 2278acpi_sleep_enable(void *arg) 2279{ 2280 2281 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2282} 2283 2284enum acpi_sleep_state { 2285 ACPI_SS_NONE, 2286 ACPI_SS_GPE_SET, 2287 ACPI_SS_DEV_SUSPEND, 2288 ACPI_SS_SLP_PREP, 2289 ACPI_SS_SLEPT, 2290}; 2291 2292/* 2293 * Enter the desired system sleep state. 2294 * 2295 * Currently we support S1-S5 but S4 is only S4BIOS 2296 */ 2297static ACPI_STATUS 2298acpi_EnterSleepState(struct acpi_softc *sc, int state) 2299{ 2300 ACPI_STATUS status; 2301 UINT8 TypeA; 2302 UINT8 TypeB; 2303 enum acpi_sleep_state slp_state; 2304 2305 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2306 2307 /* Re-entry once we're suspending is not allowed. */ 2308 status = AE_OK; 2309 ACPI_LOCK(acpi); 2310 if (sc->acpi_sleep_disabled) { 2311 ACPI_UNLOCK(acpi); 2312 printf("acpi: suspend request ignored (not ready yet)\n"); 2313 return (AE_ERROR); 2314 } 2315 sc->acpi_sleep_disabled = 1; 2316 ACPI_UNLOCK(acpi); 2317 2318 /* 2319 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2320 * drivers need this. 2321 */ 2322 mtx_lock(&Giant); 2323 slp_state = ACPI_SS_NONE; 2324 switch (state) { 2325 case ACPI_STATE_S1: 2326 case ACPI_STATE_S2: 2327 case ACPI_STATE_S3: 2328 case ACPI_STATE_S4: 2329 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2330 if (status == AE_NOT_FOUND) { 2331 device_printf(sc->acpi_dev, 2332 "Sleep state S%d not supported by BIOS\n", state); 2333 break; 2334 } else if (ACPI_FAILURE(status)) { 2335 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2336 AcpiFormatException(status)); 2337 break; 2338 } 2339 2340 sc->acpi_sstate = state; 2341 2342 /* Enable any GPEs as appropriate and requested by the user. */ 2343 acpi_wake_prep_walk(state); 2344 slp_state = ACPI_SS_GPE_SET; 2345 2346 /* 2347 * Inform all devices that we are going to sleep. If at least one 2348 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2349 * 2350 * XXX Note that a better two-pass approach with a 'veto' pass 2351 * followed by a "real thing" pass would be better, but the current 2352 * bus interface does not provide for this. 2353 */ 2354 if (DEVICE_SUSPEND(root_bus) != 0) { 2355 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2356 break; 2357 } 2358 slp_state = ACPI_SS_DEV_SUSPEND; 2359 2360 /* If testing device suspend only, back out of everything here. */ 2361 if (acpi_susp_bounce) 2362 break; 2363 2364 status = AcpiEnterSleepStatePrep(state); 2365 if (ACPI_FAILURE(status)) { 2366 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2367 AcpiFormatException(status)); 2368 break; 2369 } 2370 slp_state = ACPI_SS_SLP_PREP; 2371 2372 if (sc->acpi_sleep_delay > 0) 2373 DELAY(sc->acpi_sleep_delay * 1000000); 2374 2375 if (state != ACPI_STATE_S1) { 2376 acpi_sleep_machdep(sc, state); 2377 2378 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2379 if (state == ACPI_STATE_S4) 2380 AcpiEnable(); 2381 } else { 2382 ACPI_DISABLE_IRQS(); 2383 status = AcpiEnterSleepState(state); 2384 if (ACPI_FAILURE(status)) { 2385 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2386 AcpiFormatException(status)); 2387 break; 2388 } 2389 } 2390 slp_state = ACPI_SS_SLEPT; 2391 break; 2392 case ACPI_STATE_S5: 2393 /* 2394 * Shut down cleanly and power off. This will call us back through the 2395 * shutdown handlers. 2396 */ 2397 shutdown_nice(RB_POWEROFF); 2398 break; 2399 case ACPI_STATE_S0: 2400 default: 2401 status = AE_BAD_PARAMETER; 2402 break; 2403 } 2404 2405 /* 2406 * Back out state according to how far along we got in the suspend 2407 * process. This handles both the error and success cases. 2408 */ 2409 sc->acpi_next_sstate = 0; 2410 if (slp_state >= ACPI_SS_GPE_SET) { 2411 acpi_wake_prep_walk(state); 2412 sc->acpi_sstate = ACPI_STATE_S0; 2413 } 2414 if (slp_state >= ACPI_SS_SLP_PREP) 2415 AcpiLeaveSleepState(state); 2416 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2417 DEVICE_RESUME(root_bus); 2418 if (slp_state >= ACPI_SS_SLEPT) 2419 acpi_enable_fixed_events(sc); 2420 2421 /* Allow another sleep request after a while. */ 2422 if (state != ACPI_STATE_S5) 2423 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME); 2424 2425 /* Run /etc/rc.resume after we are back. */ 2426 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state); 2427 2428 mtx_unlock(&Giant); 2429 return_ACPI_STATUS (status); 2430} 2431 2432/* Initialize a device's wake GPE. */ 2433int 2434acpi_wake_init(device_t dev, int type) 2435{ 2436 struct acpi_prw_data prw; 2437 2438 /* Evaluate _PRW to find the GPE. */ 2439 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2440 return (ENXIO); 2441 2442 /* Set the requested type for the GPE (runtime, wake, or both). */ 2443 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2444 device_printf(dev, "set GPE type failed\n"); 2445 return (ENXIO); 2446 } 2447 2448 return (0); 2449} 2450 2451/* Enable or disable the device's wake GPE. */ 2452int 2453acpi_wake_set_enable(device_t dev, int enable) 2454{ 2455 struct acpi_prw_data prw; 2456 ACPI_STATUS status; 2457 int flags; 2458 2459 /* Make sure the device supports waking the system and get the GPE. */ 2460 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2461 return (ENXIO); 2462 2463 flags = acpi_get_flags(dev); 2464 if (enable) { 2465 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2466 if (ACPI_FAILURE(status)) { 2467 device_printf(dev, "enable wake failed\n"); 2468 return (ENXIO); 2469 } 2470 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2471 } else { 2472 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2473 if (ACPI_FAILURE(status)) { 2474 device_printf(dev, "disable wake failed\n"); 2475 return (ENXIO); 2476 } 2477 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2478 } 2479 2480 return (0); 2481} 2482 2483static int 2484acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2485{ 2486 struct acpi_prw_data prw; 2487 device_t dev; 2488 2489 /* Check that this is a wake-capable device and get its GPE. */ 2490 if (acpi_parse_prw(handle, &prw) != 0) 2491 return (ENXIO); 2492 dev = acpi_get_device(handle); 2493 2494 /* 2495 * The destination sleep state must be less than (i.e., higher power) 2496 * or equal to the value specified by _PRW. If this GPE cannot be 2497 * enabled for the next sleep state, then disable it. If it can and 2498 * the user requested it be enabled, turn on any required power resources 2499 * and set _PSW. 2500 */ 2501 if (sstate > prw.lowest_wake) { 2502 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2503 if (bootverbose) 2504 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2505 acpi_name(handle), sstate); 2506 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2507 acpi_pwr_wake_enable(handle, 1); 2508 acpi_SetInteger(handle, "_PSW", 1); 2509 if (bootverbose) 2510 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2511 acpi_name(handle), sstate); 2512 } 2513 2514 return (0); 2515} 2516 2517static int 2518acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2519{ 2520 struct acpi_prw_data prw; 2521 device_t dev; 2522 2523 /* 2524 * Check that this is a wake-capable device and get its GPE. Return 2525 * now if the user didn't enable this device for wake. 2526 */ 2527 if (acpi_parse_prw(handle, &prw) != 0) 2528 return (ENXIO); 2529 dev = acpi_get_device(handle); 2530 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2531 return (0); 2532 2533 /* 2534 * If this GPE couldn't be enabled for the previous sleep state, it was 2535 * disabled before going to sleep so re-enable it. If it was enabled, 2536 * clear _PSW and turn off any power resources it used. 2537 */ 2538 if (sstate > prw.lowest_wake) { 2539 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2540 if (bootverbose) 2541 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2542 } else { 2543 acpi_SetInteger(handle, "_PSW", 0); 2544 acpi_pwr_wake_enable(handle, 0); 2545 if (bootverbose) 2546 device_printf(dev, "run_prep cleaned up for %s\n", 2547 acpi_name(handle)); 2548 } 2549 2550 return (0); 2551} 2552 2553static ACPI_STATUS 2554acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2555{ 2556 int sstate; 2557 2558 /* If suspending, run the sleep prep function, otherwise wake. */ 2559 sstate = *(int *)context; 2560 if (AcpiGbl_SystemAwakeAndRunning) 2561 acpi_wake_sleep_prep(handle, sstate); 2562 else 2563 acpi_wake_run_prep(handle, sstate); 2564 return (AE_OK); 2565} 2566 2567/* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2568static int 2569acpi_wake_prep_walk(int sstate) 2570{ 2571 ACPI_HANDLE sb_handle; 2572 2573 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2574 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2575 acpi_wake_prep, &sstate, NULL); 2576 return (0); 2577} 2578 2579/* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2580static int 2581acpi_wake_sysctl_walk(device_t dev) 2582{ 2583 int error, i, numdevs; 2584 device_t *devlist; 2585 device_t child; 2586 ACPI_STATUS status; 2587 2588 error = device_get_children(dev, &devlist, &numdevs); 2589 if (error != 0 || numdevs == 0) { 2590 if (numdevs == 0) 2591 free(devlist, M_TEMP); 2592 return (error); 2593 } 2594 for (i = 0; i < numdevs; i++) { 2595 child = devlist[i]; 2596 acpi_wake_sysctl_walk(child); 2597 if (!device_is_attached(child)) 2598 continue; 2599 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2600 if (ACPI_SUCCESS(status)) { 2601 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2602 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2603 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2604 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2605 } 2606 } 2607 free(devlist, M_TEMP); 2608 2609 return (0); 2610} 2611 2612/* Enable or disable wake from userland. */ 2613static int 2614acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2615{ 2616 int enable, error; 2617 device_t dev; 2618 2619 dev = (device_t)arg1; 2620 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2621 2622 error = sysctl_handle_int(oidp, &enable, 0, req); 2623 if (error != 0 || req->newptr == NULL) 2624 return (error); 2625 if (enable != 0 && enable != 1) 2626 return (EINVAL); 2627 2628 return (acpi_wake_set_enable(dev, enable)); 2629} 2630 2631/* Parse a device's _PRW into a structure. */ 2632int 2633acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2634{ 2635 ACPI_STATUS status; 2636 ACPI_BUFFER prw_buffer; 2637 ACPI_OBJECT *res, *res2; 2638 int error, i, power_count; 2639 2640 if (h == NULL || prw == NULL) 2641 return (EINVAL); 2642 2643 /* 2644 * The _PRW object (7.2.9) is only required for devices that have the 2645 * ability to wake the system from a sleeping state. 2646 */ 2647 error = EINVAL; 2648 prw_buffer.Pointer = NULL; 2649 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2650 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2651 if (ACPI_FAILURE(status)) 2652 return (ENOENT); 2653 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2654 if (res == NULL) 2655 return (ENOENT); 2656 if (!ACPI_PKG_VALID(res, 2)) 2657 goto out; 2658 2659 /* 2660 * Element 1 of the _PRW object: 2661 * The lowest power system sleeping state that can be entered while still 2662 * providing wake functionality. The sleeping state being entered must 2663 * be less than (i.e., higher power) or equal to this value. 2664 */ 2665 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2666 goto out; 2667 2668 /* 2669 * Element 0 of the _PRW object: 2670 */ 2671 switch (res->Package.Elements[0].Type) { 2672 case ACPI_TYPE_INTEGER: 2673 /* 2674 * If the data type of this package element is numeric, then this 2675 * _PRW package element is the bit index in the GPEx_EN, in the 2676 * GPE blocks described in the FADT, of the enable bit that is 2677 * enabled for the wake event. 2678 */ 2679 prw->gpe_handle = NULL; 2680 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2681 error = 0; 2682 break; 2683 case ACPI_TYPE_PACKAGE: 2684 /* 2685 * If the data type of this package element is a package, then this 2686 * _PRW package element is itself a package containing two 2687 * elements. The first is an object reference to the GPE Block 2688 * device that contains the GPE that will be triggered by the wake 2689 * event. The second element is numeric and it contains the bit 2690 * index in the GPEx_EN, in the GPE Block referenced by the 2691 * first element in the package, of the enable bit that is enabled for 2692 * the wake event. 2693 * 2694 * For example, if this field is a package then it is of the form: 2695 * Package() {\_SB.PCI0.ISA.GPE, 2} 2696 */ 2697 res2 = &res->Package.Elements[0]; 2698 if (!ACPI_PKG_VALID(res2, 2)) 2699 goto out; 2700 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2701 if (prw->gpe_handle == NULL) 2702 goto out; 2703 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2704 goto out; 2705 error = 0; 2706 break; 2707 default: 2708 goto out; 2709 } 2710 2711 /* Elements 2 to N of the _PRW object are power resources. */ 2712 power_count = res->Package.Count - 2; 2713 if (power_count > ACPI_PRW_MAX_POWERRES) { 2714 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2715 power_count = 0; 2716 } 2717 prw->power_res_count = power_count; 2718 for (i = 0; i < power_count; i++) 2719 prw->power_res[i] = res->Package.Elements[i]; 2720 2721out: 2722 if (prw_buffer.Pointer != NULL) 2723 AcpiOsFree(prw_buffer.Pointer); 2724 return (error); 2725} 2726 2727/* 2728 * ACPI Event Handlers 2729 */ 2730 2731/* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2732 2733static void 2734acpi_system_eventhandler_sleep(void *arg, int state) 2735{ 2736 int ret; 2737 2738 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2739 2740 /* Check if button action is disabled. */ 2741 if (state == ACPI_S_STATES_MAX + 1) 2742 return; 2743 2744 /* Request that the system prepare to enter the given suspend state. */ 2745 ret = acpi_ReqSleepState((struct acpi_softc *)arg, state); 2746 if (ret != 0) 2747 printf("acpi: request to enter state S%d failed (err %d)\n", 2748 state, ret); 2749 2750 return_VOID; 2751} 2752 2753static void 2754acpi_system_eventhandler_wakeup(void *arg, int state) 2755{ 2756 2757 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2758 2759 /* Currently, nothing to do for wakeup. */ 2760 2761 return_VOID; 2762} 2763 2764/* 2765 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2766 */ 2767UINT32 2768acpi_event_power_button_sleep(void *context) 2769{ 2770 struct acpi_softc *sc = (struct acpi_softc *)context; 2771 2772 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2773 2774 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2775 2776 return_VALUE (ACPI_INTERRUPT_HANDLED); 2777} 2778 2779UINT32 2780acpi_event_power_button_wake(void *context) 2781{ 2782 struct acpi_softc *sc = (struct acpi_softc *)context; 2783 2784 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2785 2786 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2787 2788 return_VALUE (ACPI_INTERRUPT_HANDLED); 2789} 2790 2791UINT32 2792acpi_event_sleep_button_sleep(void *context) 2793{ 2794 struct acpi_softc *sc = (struct acpi_softc *)context; 2795 2796 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2797 2798 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2799 2800 return_VALUE (ACPI_INTERRUPT_HANDLED); 2801} 2802 2803UINT32 2804acpi_event_sleep_button_wake(void *context) 2805{ 2806 struct acpi_softc *sc = (struct acpi_softc *)context; 2807 2808 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2809 2810 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2811 2812 return_VALUE (ACPI_INTERRUPT_HANDLED); 2813} 2814 2815/* 2816 * XXX This static buffer is suboptimal. There is no locking so only 2817 * use this for single-threaded callers. 2818 */ 2819char * 2820acpi_name(ACPI_HANDLE handle) 2821{ 2822 ACPI_BUFFER buf; 2823 static char data[256]; 2824 2825 buf.Length = sizeof(data); 2826 buf.Pointer = data; 2827 2828 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2829 return (data); 2830 return ("(unknown)"); 2831} 2832 2833/* 2834 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2835 * parts of the namespace. 2836 */ 2837int 2838acpi_avoid(ACPI_HANDLE handle) 2839{ 2840 char *cp, *env, *np; 2841 int len; 2842 2843 np = acpi_name(handle); 2844 if (*np == '\\') 2845 np++; 2846 if ((env = getenv("debug.acpi.avoid")) == NULL) 2847 return (0); 2848 2849 /* Scan the avoid list checking for a match */ 2850 cp = env; 2851 for (;;) { 2852 while (*cp != 0 && isspace(*cp)) 2853 cp++; 2854 if (*cp == 0) 2855 break; 2856 len = 0; 2857 while (cp[len] != 0 && !isspace(cp[len])) 2858 len++; 2859 if (!strncmp(cp, np, len)) { 2860 freeenv(env); 2861 return(1); 2862 } 2863 cp += len; 2864 } 2865 freeenv(env); 2866 2867 return (0); 2868} 2869 2870/* 2871 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2872 */ 2873int 2874acpi_disabled(char *subsys) 2875{ 2876 char *cp, *env; 2877 int len; 2878 2879 if ((env = getenv("debug.acpi.disabled")) == NULL) 2880 return (0); 2881 if (strcmp(env, "all") == 0) { 2882 freeenv(env); 2883 return (1); 2884 } 2885 2886 /* Scan the disable list, checking for a match. */ 2887 cp = env; 2888 for (;;) { 2889 while (*cp != '\0' && isspace(*cp)) 2890 cp++; 2891 if (*cp == '\0') 2892 break; 2893 len = 0; 2894 while (cp[len] != '\0' && !isspace(cp[len])) 2895 len++; 2896 if (strncmp(cp, subsys, len) == 0) { 2897 freeenv(env); 2898 return (1); 2899 } 2900 cp += len; 2901 } 2902 freeenv(env); 2903 2904 return (0); 2905} 2906 2907/* 2908 * Control interface. 2909 * 2910 * We multiplex ioctls for all participating ACPI devices here. Individual 2911 * drivers wanting to be accessible via /dev/acpi should use the 2912 * register/deregister interface to make their handlers visible. 2913 */ 2914struct acpi_ioctl_hook 2915{ 2916 TAILQ_ENTRY(acpi_ioctl_hook) link; 2917 u_long cmd; 2918 acpi_ioctl_fn fn; 2919 void *arg; 2920}; 2921 2922static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2923static int acpi_ioctl_hooks_initted; 2924 2925int 2926acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2927{ 2928 struct acpi_ioctl_hook *hp; 2929 2930 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2931 return (ENOMEM); 2932 hp->cmd = cmd; 2933 hp->fn = fn; 2934 hp->arg = arg; 2935 2936 ACPI_LOCK(acpi); 2937 if (acpi_ioctl_hooks_initted == 0) { 2938 TAILQ_INIT(&acpi_ioctl_hooks); 2939 acpi_ioctl_hooks_initted = 1; 2940 } 2941 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2942 ACPI_UNLOCK(acpi); 2943 2944 return (0); 2945} 2946 2947void 2948acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2949{ 2950 struct acpi_ioctl_hook *hp; 2951 2952 ACPI_LOCK(acpi); 2953 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2954 if (hp->cmd == cmd && hp->fn == fn) 2955 break; 2956 2957 if (hp != NULL) { 2958 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2959 free(hp, M_ACPIDEV); 2960 } 2961 ACPI_UNLOCK(acpi); 2962} 2963 2964static int 2965acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2966{ 2967 return (0); 2968} 2969 2970static int 2971acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2972{ 2973 return (0); 2974} 2975 2976static int 2977acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2978{ 2979 struct acpi_softc *sc; 2980 struct acpi_ioctl_hook *hp; 2981 int error, state; 2982 2983 error = 0; 2984 hp = NULL; 2985 sc = dev->si_drv1; 2986 2987 /* 2988 * Scan the list of registered ioctls, looking for handlers. 2989 */ 2990 ACPI_LOCK(acpi); 2991 if (acpi_ioctl_hooks_initted) 2992 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2993 if (hp->cmd == cmd) 2994 break; 2995 } 2996 ACPI_UNLOCK(acpi); 2997 if (hp) 2998 return (hp->fn(cmd, addr, hp->arg)); 2999 3000 /* 3001 * Core ioctls are not permitted for non-writable user. 3002 * Currently, other ioctls just fetch information. 3003 * Not changing system behavior. 3004 */ 3005 if ((flag & FWRITE) == 0) 3006 return (EPERM); 3007 3008 /* Core system ioctls. */ 3009 switch (cmd) { 3010 case ACPIIO_REQSLPSTATE: 3011 state = *(int *)addr; 3012 if (state != ACPI_STATE_S5) 3013 error = acpi_ReqSleepState(sc, state); 3014 else { 3015 printf("power off via acpi ioctl not supported\n"); 3016 error = ENXIO; 3017 } 3018 break; 3019 case ACPIIO_ACKSLPSTATE: 3020 error = *(int *)addr; 3021 error = acpi_AckSleepState(sc->acpi_clone, error); 3022 break; 3023 case ACPIIO_SETSLPSTATE: /* DEPRECATED */ 3024 error = EINVAL; 3025 state = *(int *)addr; 3026 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 3027 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 3028 error = 0; 3029 break; 3030 default: 3031 error = ENXIO; 3032 break; 3033 } 3034 3035 return (error); 3036} 3037 3038static int 3039acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3040{ 3041 int error; 3042 struct sbuf sb; 3043 UINT8 state, TypeA, TypeB; 3044 3045 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 3046 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 3047 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 3048 sbuf_printf(&sb, "S%d ", state); 3049 sbuf_trim(&sb); 3050 sbuf_finish(&sb); 3051 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 3052 sbuf_delete(&sb); 3053 return (error); 3054} 3055 3056static int 3057acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 3058{ 3059 char sleep_state[10]; 3060 int error; 3061 u_int new_state, old_state; 3062 3063 old_state = *(u_int *)oidp->oid_arg1; 3064 if (old_state > ACPI_S_STATES_MAX + 1) 3065 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 3066 else 3067 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 3068 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 3069 if (error == 0 && req->newptr != NULL) { 3070 new_state = ACPI_STATE_S0; 3071 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 3072 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 3073 break; 3074 if (new_state <= ACPI_S_STATES_MAX + 1) { 3075 if (new_state != old_state) 3076 *(u_int *)oidp->oid_arg1 = new_state; 3077 } else 3078 error = EINVAL; 3079 } 3080 3081 return (error); 3082} 3083 3084/* Inform devctl(4) when we receive a Notify. */ 3085void 3086acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 3087{ 3088 char notify_buf[16]; 3089 ACPI_BUFFER handle_buf; 3090 ACPI_STATUS status; 3091 3092 if (subsystem == NULL) 3093 return; 3094 3095 handle_buf.Pointer = NULL; 3096 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 3097 status = AcpiNsHandleToPathname(h, &handle_buf); 3098 if (ACPI_FAILURE(status)) 3099 return; 3100 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 3101 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 3102 AcpiOsFree(handle_buf.Pointer); 3103} 3104 3105#ifdef ACPI_DEBUG 3106/* 3107 * Support for parsing debug options from the kernel environment. 3108 * 3109 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 3110 * by specifying the names of the bits in the debug.acpi.layer and 3111 * debug.acpi.level environment variables. Bits may be unset by 3112 * prefixing the bit name with !. 3113 */ 3114struct debugtag 3115{ 3116 char *name; 3117 UINT32 value; 3118}; 3119 3120static struct debugtag dbg_layer[] = { 3121 {"ACPI_UTILITIES", ACPI_UTILITIES}, 3122 {"ACPI_HARDWARE", ACPI_HARDWARE}, 3123 {"ACPI_EVENTS", ACPI_EVENTS}, 3124 {"ACPI_TABLES", ACPI_TABLES}, 3125 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 3126 {"ACPI_PARSER", ACPI_PARSER}, 3127 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 3128 {"ACPI_EXECUTER", ACPI_EXECUTER}, 3129 {"ACPI_RESOURCES", ACPI_RESOURCES}, 3130 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 3131 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 3132 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 3133 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 3134 3135 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 3136 {"ACPI_BATTERY", ACPI_BATTERY}, 3137 {"ACPI_BUS", ACPI_BUS}, 3138 {"ACPI_BUTTON", ACPI_BUTTON}, 3139 {"ACPI_EC", ACPI_EC}, 3140 {"ACPI_FAN", ACPI_FAN}, 3141 {"ACPI_POWERRES", ACPI_POWERRES}, 3142 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 3143 {"ACPI_THERMAL", ACPI_THERMAL}, 3144 {"ACPI_TIMER", ACPI_TIMER}, 3145 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 3146 {NULL, 0} 3147}; 3148 3149static struct debugtag dbg_level[] = { 3150 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 3151 {"ACPI_LV_WARN", ACPI_LV_WARN}, 3152 {"ACPI_LV_INIT", ACPI_LV_INIT}, 3153 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 3154 {"ACPI_LV_INFO", ACPI_LV_INFO}, 3155 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 3156 3157 /* Trace verbosity level 1 [Standard Trace Level] */ 3158 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 3159 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 3160 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 3161 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 3162 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 3163 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 3164 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 3165 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 3166 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 3167 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 3168 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 3169 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 3170 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 3171 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 3172 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 3173 3174 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 3175 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 3176 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 3177 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 3178 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 3179 {"ACPI_LV_ALL", ACPI_LV_ALL}, 3180 3181 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 3182 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 3183 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 3184 {"ACPI_LV_IO", ACPI_LV_IO}, 3185 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 3186 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 3187 3188 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3189 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3190 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3191 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3192 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3193 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3194 {NULL, 0} 3195}; 3196 3197static void 3198acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3199{ 3200 char *ep; 3201 int i, l; 3202 int set; 3203 3204 while (*cp) { 3205 if (isspace(*cp)) { 3206 cp++; 3207 continue; 3208 } 3209 ep = cp; 3210 while (*ep && !isspace(*ep)) 3211 ep++; 3212 if (*cp == '!') { 3213 set = 0; 3214 cp++; 3215 if (cp == ep) 3216 continue; 3217 } else { 3218 set = 1; 3219 } 3220 l = ep - cp; 3221 for (i = 0; tag[i].name != NULL; i++) { 3222 if (!strncmp(cp, tag[i].name, l)) { 3223 if (set) 3224 *flag |= tag[i].value; 3225 else 3226 *flag &= ~tag[i].value; 3227 } 3228 } 3229 cp = ep; 3230 } 3231} 3232 3233static void 3234acpi_set_debugging(void *junk) 3235{ 3236 char *layer, *level; 3237 3238 if (cold) { 3239 AcpiDbgLayer = 0; 3240 AcpiDbgLevel = 0; 3241 } 3242 3243 layer = getenv("debug.acpi.layer"); 3244 level = getenv("debug.acpi.level"); 3245 if (layer == NULL && level == NULL) 3246 return; 3247 3248 printf("ACPI set debug"); 3249 if (layer != NULL) { 3250 if (strcmp("NONE", layer) != 0) 3251 printf(" layer '%s'", layer); 3252 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3253 freeenv(layer); 3254 } 3255 if (level != NULL) { 3256 if (strcmp("NONE", level) != 0) 3257 printf(" level '%s'", level); 3258 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3259 freeenv(level); 3260 } 3261 printf("\n"); 3262} 3263 3264SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3265 NULL); 3266 3267static int 3268acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3269{ 3270 int error, *dbg; 3271 struct debugtag *tag; 3272 struct sbuf sb; 3273 3274 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3275 return (ENOMEM); 3276 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3277 tag = &dbg_layer[0]; 3278 dbg = &AcpiDbgLayer; 3279 } else { 3280 tag = &dbg_level[0]; 3281 dbg = &AcpiDbgLevel; 3282 } 3283 3284 /* Get old values if this is a get request. */ 3285 ACPI_SERIAL_BEGIN(acpi); 3286 if (*dbg == 0) { 3287 sbuf_cpy(&sb, "NONE"); 3288 } else if (req->newptr == NULL) { 3289 for (; tag->name != NULL; tag++) { 3290 if ((*dbg & tag->value) == tag->value) 3291 sbuf_printf(&sb, "%s ", tag->name); 3292 } 3293 } 3294 sbuf_trim(&sb); 3295 sbuf_finish(&sb); 3296 3297 /* Copy out the old values to the user. */ 3298 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3299 sbuf_delete(&sb); 3300 3301 /* If the user is setting a string, parse it. */ 3302 if (error == 0 && req->newptr != NULL) { 3303 *dbg = 0; 3304 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3305 acpi_set_debugging(NULL); 3306 } 3307 ACPI_SERIAL_END(acpi); 3308 3309 return (error); 3310} 3311 3312SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3313 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3314SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3315 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3316#endif /* ACPI_DEBUG */ 3317 3318static int 3319acpi_pm_func(u_long cmd, void *arg, ...) 3320{ 3321 int state, acpi_state; 3322 int error; 3323 struct acpi_softc *sc; 3324 va_list ap; 3325 3326 error = 0; 3327 switch (cmd) { 3328 case POWER_CMD_SUSPEND: 3329 sc = (struct acpi_softc *)arg; 3330 if (sc == NULL) { 3331 error = EINVAL; 3332 goto out; 3333 } 3334 3335 va_start(ap, arg); 3336 state = va_arg(ap, int); 3337 va_end(ap); 3338 3339 switch (state) { 3340 case POWER_SLEEP_STATE_STANDBY: 3341 acpi_state = sc->acpi_standby_sx; 3342 break; 3343 case POWER_SLEEP_STATE_SUSPEND: 3344 acpi_state = sc->acpi_suspend_sx; 3345 break; 3346 case POWER_SLEEP_STATE_HIBERNATE: 3347 acpi_state = ACPI_STATE_S4; 3348 break; 3349 default: 3350 error = EINVAL; 3351 goto out; 3352 } 3353 3354 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state))) 3355 error = ENXIO; 3356 break; 3357 default: 3358 error = EINVAL; 3359 goto out; 3360 } 3361 3362out: 3363 return (error); 3364} 3365 3366static void 3367acpi_pm_register(void *arg) 3368{ 3369 if (!cold || resource_disabled("acpi", 0)) 3370 return; 3371 3372 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3373} 3374 3375SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3376