1 /*- 2 * Copyright (c) 2000 Takanori Watanabe <takawata@jp.freebsd.org> 3 * Copyright (c) 2000 Mitsuru IWASAKI <iwasaki@jp.freebsd.org> 4 * Copyright (c) 2000, 2001 Michael Smith 5 * Copyright (c) 2000 BSDi 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_acpi.h" 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/proc.h> 37 #include <sys/fcntl.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/bus.h> 41 #include <sys/conf.h> 42 #include <sys/ioccom.h> 43 #include <sys/reboot.h> 44 #include <sys/sysctl.h> 45 #include <sys/ctype.h> 46 #include <sys/linker.h> 47 #include <sys/power.h> 48 #include <sys/sbuf.h> 49 #include <sys/smp.h> 50 51 #include <machine/resource.h> 52 #include <machine/bus.h> 53 #include <sys/rman.h> 54 #include <isa/isavar.h> 55 #include <isa/pnpvar.h> 56 57 #include <contrib/dev/acpica/acpi.h> 58 #include <dev/acpica/acpivar.h> 59 #include <dev/acpica/acpiio.h> 60 #include <contrib/dev/acpica/achware.h> 61 #include <contrib/dev/acpica/acnamesp.h> 62 63 #include "pci_if.h" 64 #include <dev/pci/pcivar.h> 65 #include <dev/pci/pci_private.h> 66 67 #include <vm/vm_param.h> 68 69 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices"); 70 71 /* Hooks for the ACPI CA debugging infrastructure */ 72 #define _COMPONENT ACPI_BUS 73 ACPI_MODULE_NAME("ACPI") 74 75 static d_open_t acpiopen; 76 static d_close_t acpiclose; 77 static d_ioctl_t acpiioctl; 78 79 static 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. */ 88 struct mtx acpi_mutex; 89 90 /* Bitmap of device quirks. */ 91 int acpi_quirks; 92 93 static int acpi_modevent(struct module *mod, int event, void *junk); 94 static void acpi_identify(driver_t *driver, device_t parent); 95 static int acpi_probe(device_t dev); 96 static int acpi_attach(device_t dev); 97 static int acpi_suspend(device_t dev); 98 static int acpi_resume(device_t dev); 99 static int acpi_shutdown(device_t dev); 100 static device_t acpi_add_child(device_t bus, int order, const char *name, 101 int unit); 102 static int acpi_print_child(device_t bus, device_t child); 103 static void acpi_probe_nomatch(device_t bus, device_t child); 104 static void acpi_driver_added(device_t dev, driver_t *driver); 105 static int acpi_read_ivar(device_t dev, device_t child, int index, 106 uintptr_t *result); 107 static int acpi_write_ivar(device_t dev, device_t child, int index, 108 uintptr_t value); 109 static struct resource_list *acpi_get_rlist(device_t dev, device_t child); 110 static int acpi_sysres_alloc(device_t dev); 111 static 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); 114 static int acpi_release_resource(device_t bus, device_t child, int type, 115 int rid, struct resource *r); 116 static void acpi_delete_resource(device_t bus, device_t child, int type, 117 int rid); 118 static uint32_t acpi_isa_get_logicalid(device_t dev); 119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count); 120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids); 121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev, 122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters, 123 ACPI_BUFFER *ret); 124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev, 125 int *dstate); 126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, 127 void *context, void **retval); 128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev, 129 int max_depth, acpi_scan_cb_t user_fn, void *arg); 130 static int acpi_set_powerstate_method(device_t bus, device_t child, 131 int state); 132 static int acpi_isa_pnp_probe(device_t bus, device_t child, 133 struct isa_pnp_id *ids); 134 static void acpi_probe_children(device_t bus); 135 static int acpi_probe_order(ACPI_HANDLE handle, int *order); 136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level, 137 void *context, void **status); 138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid); 139 static void acpi_shutdown_final(void *arg, int howto); 140 static void acpi_enable_fixed_events(struct acpi_softc *sc); 141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate); 142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate); 143 static int acpi_wake_prep_walk(int sstate); 144 static int acpi_wake_sysctl_walk(device_t dev); 145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS); 146 static void acpi_system_eventhandler_sleep(void *arg, int state); 147 static void acpi_system_eventhandler_wakeup(void *arg, int state); 148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS); 150 static int acpi_pm_func(u_long cmd, void *arg, ...); 151 static int acpi_child_location_str_method(device_t acdev, device_t child, 152 char *buf, size_t buflen); 153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child, 154 char *buf, size_t buflen); 155 156 static device_method_t acpi_methods[] = { 157 /* Device interface */ 158 DEVMETHOD(device_identify, acpi_identify), 159 DEVMETHOD(device_probe, acpi_probe), 160 DEVMETHOD(device_attach, acpi_attach), 161 DEVMETHOD(device_shutdown, acpi_shutdown), 162 DEVMETHOD(device_detach, bus_generic_detach), 163 DEVMETHOD(device_suspend, acpi_suspend), 164 DEVMETHOD(device_resume, acpi_resume), 165 166 /* Bus interface */ 167 DEVMETHOD(bus_add_child, acpi_add_child), 168 DEVMETHOD(bus_print_child, acpi_print_child), 169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch), 170 DEVMETHOD(bus_driver_added, acpi_driver_added), 171 DEVMETHOD(bus_read_ivar, acpi_read_ivar), 172 DEVMETHOD(bus_write_ivar, acpi_write_ivar), 173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist), 174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource), 177 DEVMETHOD(bus_release_resource, acpi_release_resource), 178 DEVMETHOD(bus_delete_resource, acpi_delete_resource), 179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method), 180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method), 181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 185 186 /* ACPI bus */ 187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe), 188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj), 189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep), 190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children), 191 192 /* PCI emulation */ 193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method), 194 195 /* ISA emulation */ 196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe), 197 198 {0, 0} 199 }; 200 201 static driver_t acpi_driver = { 202 "acpi", 203 acpi_methods, 204 sizeof(struct acpi_softc), 205 }; 206 207 static devclass_t acpi_devclass; 208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0); 209 MODULE_VERSION(acpi, 1); 210 211 ACPI_SERIAL_DECL(acpi, "ACPI root bus"); 212 213 /* Local pools for managing system resources for ACPI child devices. */ 214 static struct rman acpi_rman_io, acpi_rman_mem; 215 216 #define ACPI_MINIMUM_AWAKETIME 5 217 218 static const char* sleep_state_names[] = { 219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"}; 220 221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging"); 222 static char acpi_ca_version[12]; 223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD, 224 acpi_ca_version, 0, "Version of Intel ACPI-CA"); 225 226 /* 227 * Allow override of whether methods execute in parallel or not. 228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS" 229 * errors for AML that really can't handle parallel method execution. 230 * It is off by default since this breaks recursive methods and 231 * some IBMs use such code. 232 */ 233 static int acpi_serialize_methods; 234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods); 235 236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */ 237 static int acpi_do_powerstate = 1; 238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate); 239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW, 240 &acpi_do_powerstate, 1, "Turn off devices when suspending."); 241 242 /* Allow users to override quirks. */ 243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks); 244 245 /* 246 * ACPI can only be loaded as a module by the loader; activating it after 247 * system bootstrap time is not useful, and can be fatal to the system. 248 * It also cannot be unloaded, since the entire system bus heirarchy hangs 249 * off it. 250 */ 251 static int 252 acpi_modevent(struct module *mod, int event, void *junk) 253 { 254 switch (event) { 255 case MOD_LOAD: 256 if (!cold) { 257 printf("The ACPI driver cannot be loaded after boot.\n"); 258 return (EPERM); 259 } 260 break; 261 case MOD_UNLOAD: 262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI) 263 return (EBUSY); 264 break; 265 default: 266 break; 267 } 268 return (0); 269 } 270 271 /* 272 * Perform early initialization. 273 */ 274 ACPI_STATUS 275 acpi_Startup(void) 276 { 277 static int started = 0; 278 ACPI_STATUS status; 279 int val; 280 281 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 282 283 /* Only run the startup code once. The MADT driver also calls this. */ 284 if (started) 285 return_VALUE (AE_OK); 286 started = 1; 287 288 /* 289 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing 290 * if more tables exist. 291 */ 292 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) { 293 printf("ACPI: Table initialisation failed: %s\n", 294 AcpiFormatException(status)); 295 return_VALUE (status); 296 } 297 298 /* Set up any quirks we have for this system. */ 299 if (acpi_quirks == ACPI_Q_OK) 300 acpi_table_quirks(&acpi_quirks); 301 302 /* If the user manually set the disabled hint to 0, force-enable ACPI. */ 303 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0) 304 acpi_quirks &= ~ACPI_Q_BROKEN; 305 if (acpi_quirks & ACPI_Q_BROKEN) { 306 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n"); 307 status = AE_SUPPORT; 308 } 309 310 return_VALUE (status); 311 } 312 313 /* 314 * Detect ACPI, perform early initialisation 315 */ 316 static void 317 acpi_identify(driver_t *driver, device_t parent) 318 { 319 device_t child; 320 321 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 322 323 if (!cold) 324 return_VOID; 325 326 /* Check that we haven't been disabled with a hint. */ 327 if (resource_disabled("acpi", 0)) 328 return_VOID; 329 330 /* Make sure we're not being doubly invoked. */ 331 if (device_find_child(parent, "acpi", 0) != NULL) 332 return_VOID; 333 334 /* Initialize root tables. */ 335 if (ACPI_FAILURE(acpi_Startup())) { 336 printf("ACPI: Try disabling either ACPI or apic support.\n"); 337 return_VOID; 338 } 339 340 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION); 341 342 /* Attach the actual ACPI device. */ 343 if ((child = BUS_ADD_CHILD(parent, 10, "acpi", 0)) == NULL) { 344 device_printf(parent, "device_identify failed\n"); 345 return_VOID; 346 } 347 } 348 349 /* 350 * Fetch some descriptive data from ACPI to put in our attach message. 351 */ 352 static int 353 acpi_probe(device_t dev) 354 { 355 ACPI_TABLE_RSDP *rsdp; 356 ACPI_TABLE_HEADER *rsdt; 357 ACPI_PHYSICAL_ADDRESS paddr; 358 char buf[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2]; 359 struct sbuf sb; 360 361 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 362 363 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 364 power_pm_get_type() != POWER_PM_TYPE_ACPI) { 365 device_printf(dev, "probe failed, other PM system enabled.\n"); 366 return_VALUE (ENXIO); 367 } 368 369 if ((paddr = AcpiOsGetRootPointer()) == 0 || 370 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL) 371 return_VALUE (ENXIO); 372 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0) 373 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress; 374 else 375 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress; 376 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP)); 377 378 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL) 379 return_VALUE (ENXIO); 380 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN); 381 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE); 382 sbuf_trim(&sb); 383 sbuf_putc(&sb, ' '); 384 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE); 385 sbuf_trim(&sb); 386 sbuf_finish(&sb); 387 device_set_desc_copy(dev, sbuf_data(&sb)); 388 sbuf_delete(&sb); 389 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER)); 390 391 return_VALUE (0); 392 } 393 394 static int 395 acpi_attach(device_t dev) 396 { 397 struct acpi_softc *sc; 398 ACPI_TABLE_FACS *facs; 399 ACPI_STATUS status; 400 int error, state; 401 UINT32 flags; 402 UINT8 TypeA, TypeB; 403 char *env; 404 405 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 406 407 sc = device_get_softc(dev); 408 sc->acpi_dev = dev; 409 410 error = ENXIO; 411 412 /* Initialize resource manager. */ 413 acpi_rman_io.rm_type = RMAN_ARRAY; 414 acpi_rman_io.rm_start = 0; 415 acpi_rman_io.rm_end = 0xffff; 416 acpi_rman_io.rm_descr = "ACPI I/O ports"; 417 if (rman_init(&acpi_rman_io) != 0) 418 panic("acpi rman_init IO ports failed"); 419 acpi_rman_mem.rm_type = RMAN_ARRAY; 420 acpi_rman_mem.rm_start = 0; 421 acpi_rman_mem.rm_end = ~0ul; 422 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses"; 423 if (rman_init(&acpi_rman_mem) != 0) 424 panic("acpi rman_init memory failed"); 425 426 /* Initialise the ACPI mutex */ 427 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF); 428 429 /* 430 * Set the globals from our tunables. This is needed because ACPI-CA 431 * uses UINT8 for some values and we have no tunable_byte. 432 */ 433 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods; 434 AcpiGbl_EnableInterpreterSlack = TRUE; 435 436 /* Start up the ACPI CA subsystem. */ 437 status = AcpiInitializeSubsystem(); 438 if (ACPI_FAILURE(status)) { 439 device_printf(dev, "Could not initialize Subsystem: %s\n", 440 AcpiFormatException(status)); 441 goto out; 442 } 443 444 /* Load ACPI name space. */ 445 status = AcpiLoadTables(); 446 if (ACPI_FAILURE(status)) { 447 device_printf(dev, "Could not load Namespace: %s\n", 448 AcpiFormatException(status)); 449 goto out; 450 } 451 452 /* Install the default address space handlers. */ 453 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 454 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL); 455 if (ACPI_FAILURE(status)) { 456 device_printf(dev, "Could not initialise SystemMemory handler: %s\n", 457 AcpiFormatException(status)); 458 goto out; 459 } 460 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 461 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL); 462 if (ACPI_FAILURE(status)) { 463 device_printf(dev, "Could not initialise SystemIO handler: %s\n", 464 AcpiFormatException(status)); 465 goto out; 466 } 467 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT, 468 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); 469 if (ACPI_FAILURE(status)) { 470 device_printf(dev, "could not initialise PciConfig handler: %s\n", 471 AcpiFormatException(status)); 472 goto out; 473 } 474 475 /* 476 * Note that some systems (specifically, those with namespace evaluation 477 * issues that require the avoidance of parts of the namespace) must 478 * avoid running _INI and _STA on everything, as well as dodging the final 479 * object init pass. 480 * 481 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT). 482 * 483 * XXX We should arrange for the object init pass after we have attached 484 * all our child devices, but on many systems it works here. 485 */ 486 flags = 0; 487 if (testenv("debug.acpi.avoid")) 488 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT; 489 490 /* Bring the hardware and basic handlers online. */ 491 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) { 492 device_printf(dev, "Could not enable ACPI: %s\n", 493 AcpiFormatException(status)); 494 goto out; 495 } 496 497 /* 498 * Call the ECDT probe function to provide EC functionality before 499 * the namespace has been evaluated. 500 * 501 * XXX This happens before the sysresource devices have been probed and 502 * attached so its resources come from nexus0. In practice, this isn't 503 * a problem but should be addressed eventually. 504 */ 505 acpi_ec_ecdt_probe(dev); 506 507 /* Bring device objects and regions online. */ 508 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) { 509 device_printf(dev, "Could not initialize ACPI objects: %s\n", 510 AcpiFormatException(status)); 511 goto out; 512 } 513 514 /* 515 * Setup our sysctl tree. 516 * 517 * XXX: This doesn't check to make sure that none of these fail. 518 */ 519 sysctl_ctx_init(&sc->acpi_sysctl_ctx); 520 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx, 521 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, 522 device_get_name(dev), CTLFLAG_RD, 0, ""); 523 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 524 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD, 525 0, 0, acpi_supported_sleep_state_sysctl, "A", ""); 526 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 527 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW, 528 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 529 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 530 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW, 531 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", ""); 532 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 533 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW, 534 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", ""); 535 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 536 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW, 537 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", ""); 538 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 539 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW, 540 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", ""); 541 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 542 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0, 543 "sleep delay"); 544 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 545 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode"); 546 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 547 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode"); 548 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 549 OID_AUTO, "disable_on_reboot", CTLFLAG_RW, 550 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system"); 551 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree), 552 OID_AUTO, "handle_reboot", CTLFLAG_RW, 553 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot"); 554 555 /* 556 * Default to 1 second before sleeping to give some machines time to 557 * stabilize. 558 */ 559 sc->acpi_sleep_delay = 1; 560 if (bootverbose) 561 sc->acpi_verbose = 1; 562 if ((env = getenv("hw.acpi.verbose")) != NULL) { 563 if (strcmp(env, "0") != 0) 564 sc->acpi_verbose = 1; 565 freeenv(env); 566 } 567 568 /* Only enable S4BIOS by default if the FACS says it is available. */ 569 status = AcpiGetTable(ACPI_SIG_FACS, 0, (ACPI_TABLE_HEADER **)&facs); 570 if (ACPI_FAILURE(status)) { 571 device_printf(dev, "couldn't get FACS: %s\n", 572 AcpiFormatException(status)); 573 error = ENXIO; 574 goto out; 575 } 576 if (facs->Flags & ACPI_FACS_S4_BIOS_PRESENT) 577 sc->acpi_s4bios = 1; 578 579 /* 580 * Dispatch the default sleep state to devices. The lid switch is set 581 * to NONE by default to avoid surprising users. 582 */ 583 sc->acpi_power_button_sx = ACPI_STATE_S5; 584 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1; 585 sc->acpi_standby_sx = ACPI_STATE_S1; 586 sc->acpi_suspend_sx = ACPI_STATE_S3; 587 588 /* Pick the first valid sleep state for the sleep button default. */ 589 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1; 590 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++) 591 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) { 592 sc->acpi_sleep_button_sx = state; 593 break; 594 } 595 596 acpi_enable_fixed_events(sc); 597 598 /* 599 * Scan the namespace and attach/initialise children. 600 */ 601 602 /* Register our shutdown handler. */ 603 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc, 604 SHUTDOWN_PRI_LAST); 605 606 /* 607 * Register our acpi event handlers. 608 * XXX should be configurable eg. via userland policy manager. 609 */ 610 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep, 611 sc, ACPI_EVENT_PRI_LAST); 612 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup, 613 sc, ACPI_EVENT_PRI_LAST); 614 615 /* Flag our initial states. */ 616 sc->acpi_enabled = 1; 617 sc->acpi_sstate = ACPI_STATE_S0; 618 sc->acpi_sleep_disabled = 0; 619 620 /* Create the control device */ 621 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644, 622 "acpi"); 623 sc->acpi_dev_t->si_drv1 = sc; 624 625 if ((error = acpi_machdep_init(dev))) 626 goto out; 627 628 /* Register ACPI again to pass the correct argument of pm_func. */ 629 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc); 630 631 if (!acpi_disabled("bus")) 632 acpi_probe_children(dev); 633 634 error = 0; 635 636 out: 637 return_VALUE (error); 638 } 639 640 static int 641 acpi_suspend(device_t dev) 642 { 643 device_t child, *devlist; 644 int error, i, numdevs, pstate; 645 646 GIANT_REQUIRED; 647 648 /* First give child devices a chance to suspend. */ 649 error = bus_generic_suspend(dev); 650 if (error) 651 return (error); 652 653 /* 654 * Now, set them into the appropriate power state, usually D3. If the 655 * device has an _SxD method for the next sleep state, use that power 656 * state instead. 657 */ 658 device_get_children(dev, &devlist, &numdevs); 659 for (i = 0; i < numdevs; i++) { 660 /* If the device is not attached, we've powered it down elsewhere. */ 661 child = devlist[i]; 662 if (!device_is_attached(child)) 663 continue; 664 665 /* 666 * Default to D3 for all sleep states. The _SxD method is optional 667 * so set the powerstate even if it's absent. 668 */ 669 pstate = PCI_POWERSTATE_D3; 670 error = acpi_device_pwr_for_sleep(device_get_parent(child), 671 child, &pstate); 672 if ((error == 0 || error == ESRCH) && acpi_do_powerstate) 673 pci_set_powerstate(child, pstate); 674 } 675 free(devlist, M_TEMP); 676 error = 0; 677 678 return (error); 679 } 680 681 static int 682 acpi_resume(device_t dev) 683 { 684 ACPI_HANDLE handle; 685 int i, numdevs; 686 device_t child, *devlist; 687 688 GIANT_REQUIRED; 689 690 /* 691 * Put all devices in D0 before resuming them. Call _S0D on each one 692 * since some systems expect this. 693 */ 694 device_get_children(dev, &devlist, &numdevs); 695 for (i = 0; i < numdevs; i++) { 696 child = devlist[i]; 697 handle = acpi_get_handle(child); 698 if (handle) 699 AcpiEvaluateObject(handle, "_S0D", NULL, NULL); 700 if (device_is_attached(child) && acpi_do_powerstate) 701 pci_set_powerstate(child, PCI_POWERSTATE_D0); 702 } 703 free(devlist, M_TEMP); 704 705 return (bus_generic_resume(dev)); 706 } 707 708 static int 709 acpi_shutdown(device_t dev) 710 { 711 712 GIANT_REQUIRED; 713 714 /* Allow children to shutdown first. */ 715 bus_generic_shutdown(dev); 716 717 /* 718 * Enable any GPEs that are able to power-on the system (i.e., RTC). 719 * Also, disable any that are not valid for this state (most). 720 */ 721 acpi_wake_prep_walk(ACPI_STATE_S5); 722 723 return (0); 724 } 725 726 /* 727 * Handle a new device being added 728 */ 729 static device_t 730 acpi_add_child(device_t bus, int order, const char *name, int unit) 731 { 732 struct acpi_device *ad; 733 device_t child; 734 735 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL) 736 return (NULL); 737 738 resource_list_init(&ad->ad_rl); 739 740 child = device_add_child_ordered(bus, order, name, unit); 741 if (child != NULL) 742 device_set_ivars(child, ad); 743 else 744 free(ad, M_ACPIDEV); 745 return (child); 746 } 747 748 static int 749 acpi_print_child(device_t bus, device_t child) 750 { 751 struct acpi_device *adev = device_get_ivars(child); 752 struct resource_list *rl = &adev->ad_rl; 753 int retval = 0; 754 755 retval += bus_print_child_header(bus, child); 756 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx"); 757 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 758 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld"); 759 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld"); 760 if (device_get_flags(child)) 761 retval += printf(" flags %#x", device_get_flags(child)); 762 retval += bus_print_child_footer(bus, child); 763 764 return (retval); 765 } 766 767 /* 768 * If this device is an ACPI child but no one claimed it, attempt 769 * to power it off. We'll power it back up when a driver is added. 770 * 771 * XXX Disabled for now since many necessary devices (like fdc and 772 * ATA) don't claim the devices we created for them but still expect 773 * them to be powered up. 774 */ 775 static void 776 acpi_probe_nomatch(device_t bus, device_t child) 777 { 778 779 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 780 } 781 782 /* 783 * If a new driver has a chance to probe a child, first power it up. 784 * 785 * XXX Disabled for now (see acpi_probe_nomatch for details). 786 */ 787 static void 788 acpi_driver_added(device_t dev, driver_t *driver) 789 { 790 device_t child, *devlist; 791 int i, numdevs; 792 793 DEVICE_IDENTIFY(driver, dev); 794 device_get_children(dev, &devlist, &numdevs); 795 for (i = 0; i < numdevs; i++) { 796 child = devlist[i]; 797 if (device_get_state(child) == DS_NOTPRESENT) { 798 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */ 799 if (device_probe_and_attach(child) != 0) 800 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */ 801 } 802 } 803 free(devlist, M_TEMP); 804 } 805 806 /* Location hint for devctl(8) */ 807 static int 808 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf, 809 size_t buflen) 810 { 811 struct acpi_device *dinfo = device_get_ivars(child); 812 813 if (dinfo->ad_handle) 814 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle)); 815 else 816 snprintf(buf, buflen, "unknown"); 817 return (0); 818 } 819 820 /* PnP information for devctl(8) */ 821 static int 822 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf, 823 size_t buflen) 824 { 825 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL}; 826 ACPI_DEVICE_INFO *adinfo; 827 struct acpi_device *dinfo = device_get_ivars(child); 828 char *end; 829 int error; 830 831 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf); 832 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer; 833 if (error) 834 snprintf(buf, buflen, "unknown"); 835 else 836 snprintf(buf, buflen, "_HID=%s _UID=%lu", 837 (adinfo->Valid & ACPI_VALID_HID) ? 838 adinfo->HardwareId.Value : "none", 839 (adinfo->Valid & ACPI_VALID_UID) ? 840 strtoul(adinfo->UniqueId.Value, &end, 10) : 0); 841 if (adinfo) 842 AcpiOsFree(adinfo); 843 844 return (0); 845 } 846 847 /* 848 * Handle per-device ivars 849 */ 850 static int 851 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 852 { 853 struct acpi_device *ad; 854 855 if ((ad = device_get_ivars(child)) == NULL) { 856 printf("device has no ivars\n"); 857 return (ENOENT); 858 } 859 860 /* ACPI and ISA compatibility ivars */ 861 switch(index) { 862 case ACPI_IVAR_HANDLE: 863 *(ACPI_HANDLE *)result = ad->ad_handle; 864 break; 865 case ACPI_IVAR_MAGIC: 866 *(int *)result = ad->ad_magic; 867 break; 868 case ACPI_IVAR_PRIVATE: 869 *(void **)result = ad->ad_private; 870 break; 871 case ACPI_IVAR_FLAGS: 872 *(int *)result = ad->ad_flags; 873 break; 874 case ISA_IVAR_VENDORID: 875 case ISA_IVAR_SERIAL: 876 case ISA_IVAR_COMPATID: 877 *(int *)result = -1; 878 break; 879 case ISA_IVAR_LOGICALID: 880 *(int *)result = acpi_isa_get_logicalid(child); 881 break; 882 default: 883 return (ENOENT); 884 } 885 886 return (0); 887 } 888 889 static int 890 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value) 891 { 892 struct acpi_device *ad; 893 894 if ((ad = device_get_ivars(child)) == NULL) { 895 printf("device has no ivars\n"); 896 return (ENOENT); 897 } 898 899 switch(index) { 900 case ACPI_IVAR_HANDLE: 901 ad->ad_handle = (ACPI_HANDLE)value; 902 break; 903 case ACPI_IVAR_MAGIC: 904 ad->ad_magic = (int)value; 905 break; 906 case ACPI_IVAR_PRIVATE: 907 ad->ad_private = (void *)value; 908 break; 909 case ACPI_IVAR_FLAGS: 910 ad->ad_flags = (int)value; 911 break; 912 default: 913 panic("bad ivar write request (%d)", index); 914 return (ENOENT); 915 } 916 917 return (0); 918 } 919 920 /* 921 * Handle child resource allocation/removal 922 */ 923 static struct resource_list * 924 acpi_get_rlist(device_t dev, device_t child) 925 { 926 struct acpi_device *ad; 927 928 ad = device_get_ivars(child); 929 return (&ad->ad_rl); 930 } 931 932 /* 933 * Pre-allocate/manage all memory and IO resources. Since rman can't handle 934 * duplicates, we merge any in the sysresource attach routine. 935 */ 936 static int 937 acpi_sysres_alloc(device_t dev) 938 { 939 struct resource *res; 940 struct resource_list *rl; 941 struct resource_list_entry *rle; 942 struct rman *rm; 943 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL }; 944 device_t *children; 945 int child_count, i; 946 947 /* 948 * Probe/attach any sysresource devices. This would be unnecessary if we 949 * had multi-pass probe/attach. 950 */ 951 if (device_get_children(dev, &children, &child_count) != 0) 952 return (ENXIO); 953 for (i = 0; i < child_count; i++) { 954 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL) 955 device_probe_and_attach(children[i]); 956 } 957 free(children, M_TEMP); 958 959 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev); 960 STAILQ_FOREACH(rle, rl, link) { 961 if (rle->res != NULL) { 962 device_printf(dev, "duplicate resource for %lx\n", rle->start); 963 continue; 964 } 965 966 /* Only memory and IO resources are valid here. */ 967 switch (rle->type) { 968 case SYS_RES_IOPORT: 969 rm = &acpi_rman_io; 970 break; 971 case SYS_RES_MEMORY: 972 rm = &acpi_rman_mem; 973 break; 974 default: 975 continue; 976 } 977 978 /* Pre-allocate resource and add to our rman pool. */ 979 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type, 980 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0); 981 if (res != NULL) { 982 rman_manage_region(rm, rman_get_start(res), rman_get_end(res)); 983 rle->res = res; 984 } else 985 device_printf(dev, "reservation of %lx, %lx (%d) failed\n", 986 rle->start, rle->count, rle->type); 987 } 988 return (0); 989 } 990 991 static struct resource * 992 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid, 993 u_long start, u_long end, u_long count, u_int flags) 994 { 995 ACPI_RESOURCE ares; 996 struct acpi_device *ad = device_get_ivars(child); 997 struct resource_list *rl = &ad->ad_rl; 998 struct resource_list_entry *rle; 999 struct resource *res; 1000 struct rman *rm; 1001 1002 res = NULL; 1003 1004 /* We only handle memory and IO resources through rman. */ 1005 switch (type) { 1006 case SYS_RES_IOPORT: 1007 rm = &acpi_rman_io; 1008 break; 1009 case SYS_RES_MEMORY: 1010 rm = &acpi_rman_mem; 1011 break; 1012 default: 1013 rm = NULL; 1014 } 1015 1016 ACPI_SERIAL_BEGIN(acpi); 1017 1018 /* 1019 * If this is an allocation of the "default" range for a given RID, and 1020 * we know what the resources for this device are (i.e., they're on the 1021 * child's resource list), use those start/end values. 1022 */ 1023 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) { 1024 rle = resource_list_find(rl, type, *rid); 1025 if (rle == NULL) 1026 goto out; 1027 start = rle->start; 1028 end = rle->end; 1029 count = rle->count; 1030 } 1031 1032 /* 1033 * If this is an allocation of a specific range, see if we can satisfy 1034 * the request from our system resource regions. If we can't, pass the 1035 * request up to the parent. 1036 */ 1037 if (!(start == 0UL && end == ~0UL) && rm != NULL) 1038 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE, 1039 child); 1040 if (res == NULL) { 1041 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid, 1042 start, end, count, flags); 1043 } else { 1044 rman_set_rid(res, *rid); 1045 1046 /* If requested, activate the resource using the parent's method. */ 1047 if (flags & RF_ACTIVE) 1048 if (bus_activate_resource(child, type, *rid, res) != 0) { 1049 rman_release_resource(res); 1050 res = NULL; 1051 goto out; 1052 } 1053 } 1054 1055 if (res != NULL && device_get_parent(child) == bus) 1056 switch (type) { 1057 case SYS_RES_IRQ: 1058 /* 1059 * Since bus_config_intr() takes immediate effect, we cannot 1060 * configure the interrupt associated with a device when we 1061 * parse the resources but have to defer it until a driver 1062 * actually allocates the interrupt via bus_alloc_resource(). 1063 * 1064 * XXX: Should we handle the lookup failing? 1065 */ 1066 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares))) 1067 acpi_config_intr(child, &ares); 1068 break; 1069 } 1070 1071 out: 1072 ACPI_SERIAL_END(acpi); 1073 return (res); 1074 } 1075 1076 static int 1077 acpi_release_resource(device_t bus, device_t child, int type, int rid, 1078 struct resource *r) 1079 { 1080 struct rman *rm; 1081 int ret; 1082 1083 /* We only handle memory and IO resources through rman. */ 1084 switch (type) { 1085 case SYS_RES_IOPORT: 1086 rm = &acpi_rman_io; 1087 break; 1088 case SYS_RES_MEMORY: 1089 rm = &acpi_rman_mem; 1090 break; 1091 default: 1092 rm = NULL; 1093 } 1094 1095 ACPI_SERIAL_BEGIN(acpi); 1096 1097 /* 1098 * If this resource belongs to one of our internal managers, 1099 * deactivate it and release it to the local pool. If it doesn't, 1100 * pass this request up to the parent. 1101 */ 1102 if (rm != NULL && rman_is_region_manager(r, rm)) { 1103 if (rman_get_flags(r) & RF_ACTIVE) { 1104 ret = bus_deactivate_resource(child, type, rid, r); 1105 if (ret != 0) 1106 goto out; 1107 } 1108 ret = rman_release_resource(r); 1109 } else 1110 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r); 1111 1112 out: 1113 ACPI_SERIAL_END(acpi); 1114 return (ret); 1115 } 1116 1117 static void 1118 acpi_delete_resource(device_t bus, device_t child, int type, int rid) 1119 { 1120 struct resource_list *rl; 1121 1122 rl = acpi_get_rlist(bus, child); 1123 resource_list_delete(rl, type, rid); 1124 } 1125 1126 /* Allocate an IO port or memory resource, given its GAS. */ 1127 int 1128 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas, 1129 struct resource **res, u_int flags) 1130 { 1131 int error, res_type; 1132 1133 error = ENOMEM; 1134 if (type == NULL || rid == NULL || gas == NULL || res == NULL) 1135 return (EINVAL); 1136 1137 /* We only support memory and IO spaces. */ 1138 switch (gas->SpaceId) { 1139 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1140 res_type = SYS_RES_MEMORY; 1141 break; 1142 case ACPI_ADR_SPACE_SYSTEM_IO: 1143 res_type = SYS_RES_IOPORT; 1144 break; 1145 default: 1146 return (EOPNOTSUPP); 1147 } 1148 1149 /* 1150 * If the register width is less than 8, assume the BIOS author means 1151 * it is a bit field and just allocate a byte. 1152 */ 1153 if (gas->BitWidth && gas->BitWidth < 8) 1154 gas->BitWidth = 8; 1155 1156 /* Validate the address after we're sure we support the space. */ 1157 if (gas->Address == 0 || gas->BitWidth == 0) 1158 return (EINVAL); 1159 1160 bus_set_resource(dev, res_type, *rid, gas->Address, 1161 gas->BitWidth / 8); 1162 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags); 1163 if (*res != NULL) { 1164 *type = res_type; 1165 error = 0; 1166 } else 1167 bus_delete_resource(dev, res_type, *rid); 1168 1169 return (error); 1170 } 1171 1172 /* Probe _HID and _CID for compatible ISA PNP ids. */ 1173 static uint32_t 1174 acpi_isa_get_logicalid(device_t dev) 1175 { 1176 ACPI_DEVICE_INFO *devinfo; 1177 ACPI_BUFFER buf; 1178 ACPI_HANDLE h; 1179 ACPI_STATUS error; 1180 u_int32_t pnpid; 1181 1182 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1183 1184 pnpid = 0; 1185 buf.Pointer = NULL; 1186 buf.Length = ACPI_ALLOCATE_BUFFER; 1187 1188 /* Fetch and validate the HID. */ 1189 if ((h = acpi_get_handle(dev)) == NULL) 1190 goto out; 1191 error = AcpiGetObjectInfo(h, &buf); 1192 if (ACPI_FAILURE(error)) 1193 goto out; 1194 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1195 1196 if ((devinfo->Valid & ACPI_VALID_HID) != 0) 1197 pnpid = PNP_EISAID(devinfo->HardwareId.Value); 1198 1199 out: 1200 if (buf.Pointer != NULL) 1201 AcpiOsFree(buf.Pointer); 1202 return_VALUE (pnpid); 1203 } 1204 1205 static int 1206 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count) 1207 { 1208 ACPI_DEVICE_INFO *devinfo; 1209 ACPI_BUFFER buf; 1210 ACPI_HANDLE h; 1211 ACPI_STATUS error; 1212 uint32_t *pnpid; 1213 int valid, i; 1214 1215 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1216 1217 pnpid = cids; 1218 valid = 0; 1219 buf.Pointer = NULL; 1220 buf.Length = ACPI_ALLOCATE_BUFFER; 1221 1222 /* Fetch and validate the CID */ 1223 if ((h = acpi_get_handle(dev)) == NULL) 1224 goto out; 1225 error = AcpiGetObjectInfo(h, &buf); 1226 if (ACPI_FAILURE(error)) 1227 goto out; 1228 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1229 if ((devinfo->Valid & ACPI_VALID_CID) == 0) 1230 goto out; 1231 1232 if (devinfo->CompatibilityId.Count < count) 1233 count = devinfo->CompatibilityId.Count; 1234 for (i = 0; i < count; i++) { 1235 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0) 1236 continue; 1237 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value); 1238 valid++; 1239 } 1240 1241 out: 1242 if (buf.Pointer != NULL) 1243 AcpiOsFree(buf.Pointer); 1244 return_VALUE (valid); 1245 } 1246 1247 static char * 1248 acpi_device_id_probe(device_t bus, device_t dev, char **ids) 1249 { 1250 ACPI_HANDLE h; 1251 int i; 1252 1253 h = acpi_get_handle(dev); 1254 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE) 1255 return (NULL); 1256 1257 /* Try to match one of the array of IDs with a HID or CID. */ 1258 for (i = 0; ids[i] != NULL; i++) { 1259 if (acpi_MatchHid(h, ids[i])) 1260 return (ids[i]); 1261 } 1262 return (NULL); 1263 } 1264 1265 static ACPI_STATUS 1266 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname, 1267 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret) 1268 { 1269 ACPI_HANDLE h; 1270 1271 if (dev == NULL) 1272 h = ACPI_ROOT_OBJECT; 1273 else if ((h = acpi_get_handle(dev)) == NULL) 1274 return (AE_BAD_PARAMETER); 1275 return (AcpiEvaluateObject(h, pathname, parameters, ret)); 1276 } 1277 1278 static int 1279 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate) 1280 { 1281 struct acpi_softc *sc; 1282 ACPI_HANDLE handle; 1283 ACPI_STATUS status; 1284 char sxd[8]; 1285 int error; 1286 1287 sc = device_get_softc(bus); 1288 handle = acpi_get_handle(dev); 1289 1290 /* 1291 * XXX If we find these devices, don't try to power them down. 1292 * The serial and IRDA ports on my T23 hang the system when 1293 * set to D3 and it appears that such legacy devices may 1294 * need special handling in their drivers. 1295 */ 1296 if (handle == NULL || 1297 acpi_MatchHid(handle, "PNP0500") || 1298 acpi_MatchHid(handle, "PNP0501") || 1299 acpi_MatchHid(handle, "PNP0502") || 1300 acpi_MatchHid(handle, "PNP0510") || 1301 acpi_MatchHid(handle, "PNP0511")) 1302 return (ENXIO); 1303 1304 /* 1305 * Override next state with the value from _SxD, if present. If no 1306 * dstate argument was provided, don't fetch the return value. 1307 */ 1308 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate); 1309 if (dstate) 1310 status = acpi_GetInteger(handle, sxd, dstate); 1311 else 1312 status = AcpiEvaluateObject(handle, sxd, NULL, NULL); 1313 1314 switch (status) { 1315 case AE_OK: 1316 error = 0; 1317 break; 1318 case AE_NOT_FOUND: 1319 error = ESRCH; 1320 break; 1321 default: 1322 error = ENXIO; 1323 break; 1324 } 1325 1326 return (error); 1327 } 1328 1329 /* Callback arg for our implementation of walking the namespace. */ 1330 struct acpi_device_scan_ctx { 1331 acpi_scan_cb_t user_fn; 1332 void *arg; 1333 ACPI_HANDLE parent; 1334 }; 1335 1336 static ACPI_STATUS 1337 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval) 1338 { 1339 struct acpi_device_scan_ctx *ctx; 1340 device_t dev, old_dev; 1341 ACPI_STATUS status; 1342 ACPI_OBJECT_TYPE type; 1343 1344 /* 1345 * Skip this device if we think we'll have trouble with it or it is 1346 * the parent where the scan began. 1347 */ 1348 ctx = (struct acpi_device_scan_ctx *)arg; 1349 if (acpi_avoid(h) || h == ctx->parent) 1350 return (AE_OK); 1351 1352 /* If this is not a valid device type (e.g., a method), skip it. */ 1353 if (ACPI_FAILURE(AcpiGetType(h, &type))) 1354 return (AE_OK); 1355 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR && 1356 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER) 1357 return (AE_OK); 1358 1359 /* 1360 * Call the user function with the current device. If it is unchanged 1361 * afterwards, return. Otherwise, we update the handle to the new dev. 1362 */ 1363 old_dev = acpi_get_device(h); 1364 dev = old_dev; 1365 status = ctx->user_fn(h, &dev, level, ctx->arg); 1366 if (ACPI_FAILURE(status) || old_dev == dev) 1367 return (status); 1368 1369 /* Remove the old child and its connection to the handle. */ 1370 if (old_dev != NULL) { 1371 device_delete_child(device_get_parent(old_dev), old_dev); 1372 AcpiDetachData(h, acpi_fake_objhandler); 1373 } 1374 1375 /* Recreate the handle association if the user created a device. */ 1376 if (dev != NULL) 1377 AcpiAttachData(h, acpi_fake_objhandler, dev); 1378 1379 return (AE_OK); 1380 } 1381 1382 static ACPI_STATUS 1383 acpi_device_scan_children(device_t bus, device_t dev, int max_depth, 1384 acpi_scan_cb_t user_fn, void *arg) 1385 { 1386 ACPI_HANDLE h; 1387 struct acpi_device_scan_ctx ctx; 1388 1389 if (acpi_disabled("children")) 1390 return (AE_OK); 1391 1392 if (dev == NULL) 1393 h = ACPI_ROOT_OBJECT; 1394 else if ((h = acpi_get_handle(dev)) == NULL) 1395 return (AE_BAD_PARAMETER); 1396 ctx.user_fn = user_fn; 1397 ctx.arg = arg; 1398 ctx.parent = h; 1399 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth, 1400 acpi_device_scan_cb, &ctx, NULL)); 1401 } 1402 1403 /* 1404 * Even though ACPI devices are not PCI, we use the PCI approach for setting 1405 * device power states since it's close enough to ACPI. 1406 */ 1407 static int 1408 acpi_set_powerstate_method(device_t bus, device_t child, int state) 1409 { 1410 ACPI_HANDLE h; 1411 ACPI_STATUS status; 1412 int error; 1413 1414 error = 0; 1415 h = acpi_get_handle(child); 1416 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3) 1417 return (EINVAL); 1418 if (h == NULL) 1419 return (0); 1420 1421 /* Ignore errors if the power methods aren't present. */ 1422 status = acpi_pwr_switch_consumer(h, state); 1423 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND 1424 && status != AE_BAD_PARAMETER) 1425 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n", 1426 state, acpi_name(h), AcpiFormatException(status)); 1427 1428 return (error); 1429 } 1430 1431 static int 1432 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids) 1433 { 1434 int result, cid_count, i; 1435 uint32_t lid, cids[8]; 1436 1437 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1438 1439 /* 1440 * ISA-style drivers attached to ACPI may persist and 1441 * probe manually if we return ENOENT. We never want 1442 * that to happen, so don't ever return it. 1443 */ 1444 result = ENXIO; 1445 1446 /* Scan the supplied IDs for a match */ 1447 lid = acpi_isa_get_logicalid(child); 1448 cid_count = acpi_isa_get_compatid(child, cids, 8); 1449 while (ids && ids->ip_id) { 1450 if (lid == ids->ip_id) { 1451 result = 0; 1452 goto out; 1453 } 1454 for (i = 0; i < cid_count; i++) { 1455 if (cids[i] == ids->ip_id) { 1456 result = 0; 1457 goto out; 1458 } 1459 } 1460 ids++; 1461 } 1462 1463 out: 1464 if (result == 0 && ids->ip_desc) 1465 device_set_desc(child, ids->ip_desc); 1466 1467 return_VALUE (result); 1468 } 1469 1470 /* 1471 * Scan all of the ACPI namespace and attach child devices. 1472 * 1473 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and 1474 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec. 1475 * However, in violation of the spec, some systems place their PCI link 1476 * devices in \, so we have to walk the whole namespace. We check the 1477 * type of namespace nodes, so this should be ok. 1478 */ 1479 static void 1480 acpi_probe_children(device_t bus) 1481 { 1482 1483 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1484 1485 /* 1486 * Scan the namespace and insert placeholders for all the devices that 1487 * we find. We also probe/attach any early devices. 1488 * 1489 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because 1490 * we want to create nodes for all devices, not just those that are 1491 * currently present. (This assumes that we don't want to create/remove 1492 * devices as they appear, which might be smarter.) 1493 */ 1494 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n")); 1495 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child, 1496 bus, NULL); 1497 1498 /* Pre-allocate resources for our rman from any sysresource devices. */ 1499 acpi_sysres_alloc(bus); 1500 1501 /* Create any static children by calling device identify methods. */ 1502 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n")); 1503 bus_generic_probe(bus); 1504 1505 /* Probe/attach all children, created staticly and from the namespace. */ 1506 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n")); 1507 bus_generic_attach(bus); 1508 1509 /* 1510 * Some of these children may have attached others as part of their attach 1511 * process (eg. the root PCI bus driver), so rescan. 1512 */ 1513 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n")); 1514 bus_generic_attach(bus); 1515 1516 /* Attach wake sysctls. */ 1517 acpi_wake_sysctl_walk(bus); 1518 1519 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n")); 1520 return_VOID; 1521 } 1522 1523 /* 1524 * Determine the probe order for a given device and return non-zero if it 1525 * should be attached immediately. 1526 */ 1527 static int 1528 acpi_probe_order(ACPI_HANDLE handle, int *order) 1529 { 1530 1531 /* 1532 * 1. I/O port and memory system resource holders 1533 * 2. Embedded controllers (to handle early accesses) 1534 * 3. PCI Link Devices 1535 */ 1536 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02")) 1537 *order = 1; 1538 else if (acpi_MatchHid(handle, "PNP0C09")) 1539 *order = 2; 1540 else if (acpi_MatchHid(handle, "PNP0C0F")) 1541 *order = 3; 1542 return (0); 1543 } 1544 1545 /* 1546 * Evaluate a child device and determine whether we might attach a device to 1547 * it. 1548 */ 1549 static ACPI_STATUS 1550 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 1551 { 1552 ACPI_OBJECT_TYPE type; 1553 ACPI_HANDLE h; 1554 device_t bus, child; 1555 int order; 1556 char *handle_str, **search; 1557 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL}; 1558 1559 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 1560 1561 /* Skip this device if we think we'll have trouble with it. */ 1562 if (acpi_avoid(handle)) 1563 return_ACPI_STATUS (AE_OK); 1564 1565 bus = (device_t)context; 1566 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) { 1567 switch (type) { 1568 case ACPI_TYPE_DEVICE: 1569 case ACPI_TYPE_PROCESSOR: 1570 case ACPI_TYPE_THERMAL: 1571 case ACPI_TYPE_POWER: 1572 if (acpi_disabled("children")) 1573 break; 1574 1575 /* 1576 * Since we scan from \, be sure to skip system scope objects. 1577 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?) 1578 */ 1579 handle_str = acpi_name(handle); 1580 for (search = scopes; *search != NULL; search++) { 1581 if (strcmp(handle_str, *search) == 0) 1582 break; 1583 } 1584 if (*search != NULL) 1585 break; 1586 1587 /* 1588 * Create a placeholder device for this node. Sort the placeholder 1589 * so that the probe/attach passes will run breadth-first. Orders 1590 * less than 10 are reserved for special objects (i.e., system 1591 * resources). Larger values are used for all other devices. 1592 */ 1593 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str)); 1594 order = (level + 1) * 10; 1595 acpi_probe_order(handle, &order); 1596 child = BUS_ADD_CHILD(bus, order, NULL, -1); 1597 if (child == NULL) 1598 break; 1599 1600 /* Associate the handle with the device_t and vice versa. */ 1601 acpi_set_handle(child, handle); 1602 AcpiAttachData(handle, acpi_fake_objhandler, child); 1603 1604 /* 1605 * Check that the device is present. If it's not present, 1606 * leave it disabled (so that we have a device_t attached to 1607 * the handle, but we don't probe it). 1608 * 1609 * XXX PCI link devices sometimes report "present" but not 1610 * "functional" (i.e. if disabled). Go ahead and probe them 1611 * anyway since we may enable them later. 1612 */ 1613 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) { 1614 /* Never disable PCI link devices. */ 1615 if (acpi_MatchHid(handle, "PNP0C0F")) 1616 break; 1617 /* 1618 * Docking stations should remain enabled since the system 1619 * may be undocked at boot. 1620 */ 1621 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h))) 1622 break; 1623 1624 device_disable(child); 1625 break; 1626 } 1627 1628 /* 1629 * Get the device's resource settings and attach them. 1630 * Note that if the device has _PRS but no _CRS, we need 1631 * to decide when it's appropriate to try to configure the 1632 * device. Ignore the return value here; it's OK for the 1633 * device not to have any resources. 1634 */ 1635 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL); 1636 break; 1637 } 1638 } 1639 1640 return_ACPI_STATUS (AE_OK); 1641 } 1642 1643 /* 1644 * AcpiAttachData() requires an object handler but never uses it. This is a 1645 * placeholder object handler so we can store a device_t in an ACPI_HANDLE. 1646 */ 1647 void 1648 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data) 1649 { 1650 } 1651 1652 static void 1653 acpi_shutdown_final(void *arg, int howto) 1654 { 1655 struct acpi_softc *sc; 1656 ACPI_STATUS status; 1657 1658 /* 1659 * XXX Shutdown code should only run on the BSP (cpuid 0). 1660 * Some chipsets do not power off the system correctly if called from 1661 * an AP. 1662 */ 1663 sc = arg; 1664 if ((howto & RB_POWEROFF) != 0) { 1665 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5); 1666 if (ACPI_FAILURE(status)) { 1667 printf("AcpiEnterSleepStatePrep failed - %s\n", 1668 AcpiFormatException(status)); 1669 return; 1670 } 1671 printf("Powering system off using ACPI\n"); 1672 ACPI_DISABLE_IRQS(); 1673 status = AcpiEnterSleepState(ACPI_STATE_S5); 1674 if (ACPI_FAILURE(status)) { 1675 printf("ACPI power-off failed - %s\n", AcpiFormatException(status)); 1676 } else { 1677 DELAY(1000000); 1678 printf("ACPI power-off failed - timeout\n"); 1679 } 1680 } else if ((howto & RB_HALT) == 0 && 1681 (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER) && 1682 sc->acpi_handle_reboot) { 1683 /* Reboot using the reset register. */ 1684 status = AcpiHwLowLevelWrite( 1685 AcpiGbl_FADT.ResetRegister.BitWidth, 1686 AcpiGbl_FADT.ResetValue, &AcpiGbl_FADT.ResetRegister); 1687 if (ACPI_FAILURE(status)) { 1688 printf("ACPI reset failed - %s\n", AcpiFormatException(status)); 1689 } else { 1690 DELAY(1000000); 1691 printf("ACPI reset failed - timeout\n"); 1692 } 1693 } else if (sc->acpi_do_disable && panicstr == NULL) { 1694 /* 1695 * Only disable ACPI if the user requested. On some systems, writing 1696 * the disable value to SMI_CMD hangs the system. 1697 */ 1698 printf("Shutting down ACPI\n"); 1699 AcpiTerminate(); 1700 } 1701 } 1702 1703 static void 1704 acpi_enable_fixed_events(struct acpi_softc *sc) 1705 { 1706 static int first_time = 1; 1707 1708 /* Enable and clear fixed events and install handlers. */ 1709 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) { 1710 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON); 1711 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON, 1712 acpi_event_power_button_sleep, sc); 1713 if (first_time) 1714 device_printf(sc->acpi_dev, "Power Button (fixed)\n"); 1715 } 1716 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) { 1717 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON); 1718 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON, 1719 acpi_event_sleep_button_sleep, sc); 1720 if (first_time) 1721 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n"); 1722 } 1723 1724 first_time = 0; 1725 } 1726 1727 /* 1728 * Returns true if the device is actually present and should 1729 * be attached to. This requires the present, enabled, UI-visible 1730 * and diagnostics-passed bits to be set. 1731 */ 1732 BOOLEAN 1733 acpi_DeviceIsPresent(device_t dev) 1734 { 1735 ACPI_DEVICE_INFO *devinfo; 1736 ACPI_HANDLE h; 1737 ACPI_BUFFER buf; 1738 ACPI_STATUS error; 1739 int ret; 1740 1741 ret = FALSE; 1742 if ((h = acpi_get_handle(dev)) == NULL) 1743 return (FALSE); 1744 buf.Pointer = NULL; 1745 buf.Length = ACPI_ALLOCATE_BUFFER; 1746 error = AcpiGetObjectInfo(h, &buf); 1747 if (ACPI_FAILURE(error)) 1748 return (FALSE); 1749 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1750 1751 /* If no _STA method, must be present */ 1752 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1753 ret = TRUE; 1754 1755 /* Return true for 'present' and 'functioning' */ 1756 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus)) 1757 ret = TRUE; 1758 1759 AcpiOsFree(buf.Pointer); 1760 return (ret); 1761 } 1762 1763 /* 1764 * Returns true if the battery is actually present and inserted. 1765 */ 1766 BOOLEAN 1767 acpi_BatteryIsPresent(device_t dev) 1768 { 1769 ACPI_DEVICE_INFO *devinfo; 1770 ACPI_HANDLE h; 1771 ACPI_BUFFER buf; 1772 ACPI_STATUS error; 1773 int ret; 1774 1775 ret = FALSE; 1776 if ((h = acpi_get_handle(dev)) == NULL) 1777 return (FALSE); 1778 buf.Pointer = NULL; 1779 buf.Length = ACPI_ALLOCATE_BUFFER; 1780 error = AcpiGetObjectInfo(h, &buf); 1781 if (ACPI_FAILURE(error)) 1782 return (FALSE); 1783 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1784 1785 /* If no _STA method, must be present */ 1786 if ((devinfo->Valid & ACPI_VALID_STA) == 0) 1787 ret = TRUE; 1788 1789 /* Return true for 'present', 'battery present', and 'functioning' */ 1790 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus)) 1791 ret = TRUE; 1792 1793 AcpiOsFree(buf.Pointer); 1794 return (ret); 1795 } 1796 1797 /* 1798 * Match a HID string against a handle 1799 */ 1800 static BOOLEAN 1801 acpi_MatchHid(ACPI_HANDLE h, const char *hid) 1802 { 1803 ACPI_DEVICE_INFO *devinfo; 1804 ACPI_BUFFER buf; 1805 ACPI_STATUS error; 1806 int ret, i; 1807 1808 ret = FALSE; 1809 if (hid == NULL || h == NULL) 1810 return (ret); 1811 buf.Pointer = NULL; 1812 buf.Length = ACPI_ALLOCATE_BUFFER; 1813 error = AcpiGetObjectInfo(h, &buf); 1814 if (ACPI_FAILURE(error)) 1815 return (ret); 1816 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer; 1817 1818 if ((devinfo->Valid & ACPI_VALID_HID) != 0 && 1819 strcmp(hid, devinfo->HardwareId.Value) == 0) 1820 ret = TRUE; 1821 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) { 1822 for (i = 0; i < devinfo->CompatibilityId.Count; i++) { 1823 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) { 1824 ret = TRUE; 1825 break; 1826 } 1827 } 1828 } 1829 1830 AcpiOsFree(buf.Pointer); 1831 return (ret); 1832 } 1833 1834 /* 1835 * Return the handle of a named object within our scope, ie. that of (parent) 1836 * or one if its parents. 1837 */ 1838 ACPI_STATUS 1839 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result) 1840 { 1841 ACPI_HANDLE r; 1842 ACPI_STATUS status; 1843 1844 /* Walk back up the tree to the root */ 1845 for (;;) { 1846 status = AcpiGetHandle(parent, path, &r); 1847 if (ACPI_SUCCESS(status)) { 1848 *result = r; 1849 return (AE_OK); 1850 } 1851 /* XXX Return error here? */ 1852 if (status != AE_NOT_FOUND) 1853 return (AE_OK); 1854 if (ACPI_FAILURE(AcpiGetParent(parent, &r))) 1855 return (AE_NOT_FOUND); 1856 parent = r; 1857 } 1858 } 1859 1860 /* Find the difference between two PM tick counts. */ 1861 uint32_t 1862 acpi_TimerDelta(uint32_t end, uint32_t start) 1863 { 1864 uint32_t delta; 1865 1866 if (end >= start) 1867 delta = end - start; 1868 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER) 1869 delta = ((0xFFFFFFFF - start) + end + 1); 1870 else 1871 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF; 1872 return (delta); 1873 } 1874 1875 /* 1876 * Allocate a buffer with a preset data size. 1877 */ 1878 ACPI_BUFFER * 1879 acpi_AllocBuffer(int size) 1880 { 1881 ACPI_BUFFER *buf; 1882 1883 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL) 1884 return (NULL); 1885 buf->Length = size; 1886 buf->Pointer = (void *)(buf + 1); 1887 return (buf); 1888 } 1889 1890 ACPI_STATUS 1891 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number) 1892 { 1893 ACPI_OBJECT arg1; 1894 ACPI_OBJECT_LIST args; 1895 1896 arg1.Type = ACPI_TYPE_INTEGER; 1897 arg1.Integer.Value = number; 1898 args.Count = 1; 1899 args.Pointer = &arg1; 1900 1901 return (AcpiEvaluateObject(handle, path, &args, NULL)); 1902 } 1903 1904 /* 1905 * Evaluate a path that should return an integer. 1906 */ 1907 ACPI_STATUS 1908 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number) 1909 { 1910 ACPI_STATUS status; 1911 ACPI_BUFFER buf; 1912 ACPI_OBJECT param; 1913 1914 if (handle == NULL) 1915 handle = ACPI_ROOT_OBJECT; 1916 1917 /* 1918 * Assume that what we've been pointed at is an Integer object, or 1919 * a method that will return an Integer. 1920 */ 1921 buf.Pointer = ¶m; 1922 buf.Length = sizeof(param); 1923 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1924 if (ACPI_SUCCESS(status)) { 1925 if (param.Type == ACPI_TYPE_INTEGER) 1926 *number = param.Integer.Value; 1927 else 1928 status = AE_TYPE; 1929 } 1930 1931 /* 1932 * In some applications, a method that's expected to return an Integer 1933 * may instead return a Buffer (probably to simplify some internal 1934 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer, 1935 * convert it into an Integer as best we can. 1936 * 1937 * This is a hack. 1938 */ 1939 if (status == AE_BUFFER_OVERFLOW) { 1940 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) { 1941 status = AE_NO_MEMORY; 1942 } else { 1943 status = AcpiEvaluateObject(handle, path, NULL, &buf); 1944 if (ACPI_SUCCESS(status)) 1945 status = acpi_ConvertBufferToInteger(&buf, number); 1946 AcpiOsFree(buf.Pointer); 1947 } 1948 } 1949 return (status); 1950 } 1951 1952 ACPI_STATUS 1953 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number) 1954 { 1955 ACPI_OBJECT *p; 1956 UINT8 *val; 1957 int i; 1958 1959 p = (ACPI_OBJECT *)bufp->Pointer; 1960 if (p->Type == ACPI_TYPE_INTEGER) { 1961 *number = p->Integer.Value; 1962 return (AE_OK); 1963 } 1964 if (p->Type != ACPI_TYPE_BUFFER) 1965 return (AE_TYPE); 1966 if (p->Buffer.Length > sizeof(int)) 1967 return (AE_BAD_DATA); 1968 1969 *number = 0; 1970 val = p->Buffer.Pointer; 1971 for (i = 0; i < p->Buffer.Length; i++) 1972 *number += val[i] << (i * 8); 1973 return (AE_OK); 1974 } 1975 1976 /* 1977 * Iterate over the elements of an a package object, calling the supplied 1978 * function for each element. 1979 * 1980 * XXX possible enhancement might be to abort traversal on error. 1981 */ 1982 ACPI_STATUS 1983 acpi_ForeachPackageObject(ACPI_OBJECT *pkg, 1984 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg) 1985 { 1986 ACPI_OBJECT *comp; 1987 int i; 1988 1989 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE) 1990 return (AE_BAD_PARAMETER); 1991 1992 /* Iterate over components */ 1993 i = 0; 1994 comp = pkg->Package.Elements; 1995 for (; i < pkg->Package.Count; i++, comp++) 1996 func(comp, arg); 1997 1998 return (AE_OK); 1999 } 2000 2001 /* 2002 * Find the (index)th resource object in a set. 2003 */ 2004 ACPI_STATUS 2005 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp) 2006 { 2007 ACPI_RESOURCE *rp; 2008 int i; 2009 2010 rp = (ACPI_RESOURCE *)buf->Pointer; 2011 i = index; 2012 while (i-- > 0) { 2013 /* Range check */ 2014 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2015 return (AE_BAD_PARAMETER); 2016 2017 /* Check for terminator */ 2018 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2019 return (AE_NOT_FOUND); 2020 rp = ACPI_NEXT_RESOURCE(rp); 2021 } 2022 if (resp != NULL) 2023 *resp = rp; 2024 2025 return (AE_OK); 2026 } 2027 2028 /* 2029 * Append an ACPI_RESOURCE to an ACPI_BUFFER. 2030 * 2031 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER 2032 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible 2033 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of 2034 * resources. 2035 */ 2036 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512 2037 2038 ACPI_STATUS 2039 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res) 2040 { 2041 ACPI_RESOURCE *rp; 2042 void *newp; 2043 2044 /* Initialise the buffer if necessary. */ 2045 if (buf->Pointer == NULL) { 2046 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE; 2047 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL) 2048 return (AE_NO_MEMORY); 2049 rp = (ACPI_RESOURCE *)buf->Pointer; 2050 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2051 rp->Length = 0; 2052 } 2053 if (res == NULL) 2054 return (AE_OK); 2055 2056 /* 2057 * Scan the current buffer looking for the terminator. 2058 * This will either find the terminator or hit the end 2059 * of the buffer and return an error. 2060 */ 2061 rp = (ACPI_RESOURCE *)buf->Pointer; 2062 for (;;) { 2063 /* Range check, don't go outside the buffer */ 2064 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length)) 2065 return (AE_BAD_PARAMETER); 2066 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0) 2067 break; 2068 rp = ACPI_NEXT_RESOURCE(rp); 2069 } 2070 2071 /* 2072 * Check the size of the buffer and expand if required. 2073 * 2074 * Required size is: 2075 * size of existing resources before terminator + 2076 * size of new resource and header + 2077 * size of terminator. 2078 * 2079 * Note that this loop should really only run once, unless 2080 * for some reason we are stuffing a *really* huge resource. 2081 */ 2082 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) + 2083 res->Length + ACPI_RS_SIZE_NO_DATA + 2084 ACPI_RS_SIZE_MIN) >= buf->Length) { 2085 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL) 2086 return (AE_NO_MEMORY); 2087 bcopy(buf->Pointer, newp, buf->Length); 2088 rp = (ACPI_RESOURCE *)((u_int8_t *)newp + 2089 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer)); 2090 AcpiOsFree(buf->Pointer); 2091 buf->Pointer = newp; 2092 buf->Length += buf->Length; 2093 } 2094 2095 /* Insert the new resource. */ 2096 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA); 2097 2098 /* And add the terminator. */ 2099 rp = ACPI_NEXT_RESOURCE(rp); 2100 rp->Type = ACPI_RESOURCE_TYPE_END_TAG; 2101 rp->Length = 0; 2102 2103 return (AE_OK); 2104 } 2105 2106 /* 2107 * Set interrupt model. 2108 */ 2109 ACPI_STATUS 2110 acpi_SetIntrModel(int model) 2111 { 2112 2113 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model)); 2114 } 2115 2116 static void 2117 acpi_sleep_enable(void *arg) 2118 { 2119 2120 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0; 2121 } 2122 2123 enum acpi_sleep_state { 2124 ACPI_SS_NONE, 2125 ACPI_SS_GPE_SET, 2126 ACPI_SS_DEV_SUSPEND, 2127 ACPI_SS_SLP_PREP, 2128 ACPI_SS_SLEPT, 2129 }; 2130 2131 /* 2132 * Set the system sleep state 2133 * 2134 * Currently we support S1-S5 but S4 is only S4BIOS 2135 */ 2136 ACPI_STATUS 2137 acpi_SetSleepState(struct acpi_softc *sc, int state) 2138 { 2139 ACPI_STATUS status; 2140 UINT8 TypeA; 2141 UINT8 TypeB; 2142 enum acpi_sleep_state slp_state; 2143 2144 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2145 2146 status = AE_OK; 2147 ACPI_LOCK(acpi); 2148 if (sc->acpi_sleep_disabled) { 2149 if (sc->acpi_sstate != ACPI_STATE_S0) 2150 status = AE_ERROR; 2151 ACPI_UNLOCK(acpi); 2152 printf("acpi: suspend request ignored (not ready yet)\n"); 2153 return (status); 2154 } 2155 sc->acpi_sleep_disabled = 1; 2156 ACPI_UNLOCK(acpi); 2157 2158 /* 2159 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE 2160 * drivers need this. 2161 */ 2162 mtx_lock(&Giant); 2163 slp_state = ACPI_SS_NONE; 2164 switch (state) { 2165 case ACPI_STATE_S1: 2166 case ACPI_STATE_S2: 2167 case ACPI_STATE_S3: 2168 case ACPI_STATE_S4: 2169 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB); 2170 if (status == AE_NOT_FOUND) { 2171 device_printf(sc->acpi_dev, 2172 "Sleep state S%d not supported by BIOS\n", state); 2173 break; 2174 } else if (ACPI_FAILURE(status)) { 2175 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n", 2176 AcpiFormatException(status)); 2177 break; 2178 } 2179 2180 sc->acpi_sstate = state; 2181 2182 /* Enable any GPEs as appropriate and requested by the user. */ 2183 acpi_wake_prep_walk(state); 2184 slp_state = ACPI_SS_GPE_SET; 2185 2186 /* 2187 * Inform all devices that we are going to sleep. If at least one 2188 * device fails, DEVICE_SUSPEND() automatically resumes the tree. 2189 * 2190 * XXX Note that a better two-pass approach with a 'veto' pass 2191 * followed by a "real thing" pass would be better, but the current 2192 * bus interface does not provide for this. 2193 */ 2194 if (DEVICE_SUSPEND(root_bus) != 0) { 2195 device_printf(sc->acpi_dev, "device_suspend failed\n"); 2196 break; 2197 } 2198 slp_state = ACPI_SS_DEV_SUSPEND; 2199 2200 status = AcpiEnterSleepStatePrep(state); 2201 if (ACPI_FAILURE(status)) { 2202 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n", 2203 AcpiFormatException(status)); 2204 break; 2205 } 2206 slp_state = ACPI_SS_SLP_PREP; 2207 2208 if (sc->acpi_sleep_delay > 0) 2209 DELAY(sc->acpi_sleep_delay * 1000000); 2210 2211 if (state != ACPI_STATE_S1) { 2212 acpi_sleep_machdep(sc, state); 2213 2214 /* Re-enable ACPI hardware on wakeup from sleep state 4. */ 2215 if (state == ACPI_STATE_S4) 2216 AcpiEnable(); 2217 } else { 2218 ACPI_DISABLE_IRQS(); 2219 status = AcpiEnterSleepState(state); 2220 if (ACPI_FAILURE(status)) { 2221 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n", 2222 AcpiFormatException(status)); 2223 break; 2224 } 2225 } 2226 slp_state = ACPI_SS_SLEPT; 2227 break; 2228 case ACPI_STATE_S5: 2229 /* 2230 * Shut down cleanly and power off. This will call us back through the 2231 * shutdown handlers. 2232 */ 2233 shutdown_nice(RB_POWEROFF); 2234 break; 2235 case ACPI_STATE_S0: 2236 default: 2237 status = AE_BAD_PARAMETER; 2238 break; 2239 } 2240 2241 /* 2242 * Back out state according to how far along we got in the suspend 2243 * process. This handles both the error and success cases. 2244 */ 2245 if (slp_state >= ACPI_SS_GPE_SET) { 2246 acpi_wake_prep_walk(state); 2247 sc->acpi_sstate = ACPI_STATE_S0; 2248 } 2249 if (slp_state >= ACPI_SS_SLP_PREP) 2250 AcpiLeaveSleepState(state); 2251 if (slp_state >= ACPI_SS_DEV_SUSPEND) 2252 DEVICE_RESUME(root_bus); 2253 if (slp_state >= ACPI_SS_SLEPT) 2254 acpi_enable_fixed_events(sc); 2255 2256 /* Allow another sleep request after a while. */ 2257 if (state != ACPI_STATE_S5) 2258 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME); 2259 2260 mtx_unlock(&Giant); 2261 return_ACPI_STATUS (status); 2262 } 2263 2264 /* Initialize a device's wake GPE. */ 2265 int 2266 acpi_wake_init(device_t dev, int type) 2267 { 2268 struct acpi_prw_data prw; 2269 2270 /* Evaluate _PRW to find the GPE. */ 2271 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2272 return (ENXIO); 2273 2274 /* Set the requested type for the GPE (runtime, wake, or both). */ 2275 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) { 2276 device_printf(dev, "set GPE type failed\n"); 2277 return (ENXIO); 2278 } 2279 2280 return (0); 2281 } 2282 2283 /* Enable or disable the device's wake GPE. */ 2284 int 2285 acpi_wake_set_enable(device_t dev, int enable) 2286 { 2287 struct acpi_prw_data prw; 2288 ACPI_STATUS status; 2289 int flags; 2290 2291 /* Make sure the device supports waking the system and get the GPE. */ 2292 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0) 2293 return (ENXIO); 2294 2295 flags = acpi_get_flags(dev); 2296 if (enable) { 2297 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2298 if (ACPI_FAILURE(status)) { 2299 device_printf(dev, "enable wake failed\n"); 2300 return (ENXIO); 2301 } 2302 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED); 2303 } else { 2304 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2305 if (ACPI_FAILURE(status)) { 2306 device_printf(dev, "disable wake failed\n"); 2307 return (ENXIO); 2308 } 2309 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED); 2310 } 2311 2312 return (0); 2313 } 2314 2315 static int 2316 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate) 2317 { 2318 struct acpi_prw_data prw; 2319 device_t dev; 2320 2321 /* Check that this is a wake-capable device and get its GPE. */ 2322 if (acpi_parse_prw(handle, &prw) != 0) 2323 return (ENXIO); 2324 dev = acpi_get_device(handle); 2325 2326 /* 2327 * The destination sleep state must be less than (i.e., higher power) 2328 * or equal to the value specified by _PRW. If this GPE cannot be 2329 * enabled for the next sleep state, then disable it. If it can and 2330 * the user requested it be enabled, turn on any required power resources 2331 * and set _PSW. 2332 */ 2333 if (sstate > prw.lowest_wake) { 2334 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2335 if (bootverbose) 2336 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n", 2337 acpi_name(handle), sstate); 2338 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) { 2339 acpi_pwr_wake_enable(handle, 1); 2340 acpi_SetInteger(handle, "_PSW", 1); 2341 if (bootverbose) 2342 device_printf(dev, "wake_prep enabled for %s (S%d)\n", 2343 acpi_name(handle), sstate); 2344 } 2345 2346 return (0); 2347 } 2348 2349 static int 2350 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate) 2351 { 2352 struct acpi_prw_data prw; 2353 device_t dev; 2354 2355 /* 2356 * Check that this is a wake-capable device and get its GPE. Return 2357 * now if the user didn't enable this device for wake. 2358 */ 2359 if (acpi_parse_prw(handle, &prw) != 0) 2360 return (ENXIO); 2361 dev = acpi_get_device(handle); 2362 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0) 2363 return (0); 2364 2365 /* 2366 * If this GPE couldn't be enabled for the previous sleep state, it was 2367 * disabled before going to sleep so re-enable it. If it was enabled, 2368 * clear _PSW and turn off any power resources it used. 2369 */ 2370 if (sstate > prw.lowest_wake) { 2371 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR); 2372 if (bootverbose) 2373 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle)); 2374 } else { 2375 acpi_SetInteger(handle, "_PSW", 0); 2376 acpi_pwr_wake_enable(handle, 0); 2377 if (bootverbose) 2378 device_printf(dev, "run_prep cleaned up for %s\n", 2379 acpi_name(handle)); 2380 } 2381 2382 return (0); 2383 } 2384 2385 static ACPI_STATUS 2386 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status) 2387 { 2388 int sstate; 2389 2390 /* If suspending, run the sleep prep function, otherwise wake. */ 2391 sstate = *(int *)context; 2392 if (AcpiGbl_SystemAwakeAndRunning) 2393 acpi_wake_sleep_prep(handle, sstate); 2394 else 2395 acpi_wake_run_prep(handle, sstate); 2396 return (AE_OK); 2397 } 2398 2399 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */ 2400 static int 2401 acpi_wake_prep_walk(int sstate) 2402 { 2403 ACPI_HANDLE sb_handle; 2404 2405 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle))) 2406 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100, 2407 acpi_wake_prep, &sstate, NULL); 2408 return (0); 2409 } 2410 2411 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */ 2412 static int 2413 acpi_wake_sysctl_walk(device_t dev) 2414 { 2415 int error, i, numdevs; 2416 device_t *devlist; 2417 device_t child; 2418 ACPI_STATUS status; 2419 2420 error = device_get_children(dev, &devlist, &numdevs); 2421 if (error != 0 || numdevs == 0) { 2422 if (numdevs == 0) 2423 free(devlist, M_TEMP); 2424 return (error); 2425 } 2426 for (i = 0; i < numdevs; i++) { 2427 child = devlist[i]; 2428 acpi_wake_sysctl_walk(child); 2429 if (!device_is_attached(child)) 2430 continue; 2431 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL); 2432 if (ACPI_SUCCESS(status)) { 2433 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child), 2434 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO, 2435 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0, 2436 acpi_wake_set_sysctl, "I", "Device set to wake the system"); 2437 } 2438 } 2439 free(devlist, M_TEMP); 2440 2441 return (0); 2442 } 2443 2444 /* Enable or disable wake from userland. */ 2445 static int 2446 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS) 2447 { 2448 int enable, error; 2449 device_t dev; 2450 2451 dev = (device_t)arg1; 2452 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0; 2453 2454 error = sysctl_handle_int(oidp, &enable, 0, req); 2455 if (error != 0 || req->newptr == NULL) 2456 return (error); 2457 if (enable != 0 && enable != 1) 2458 return (EINVAL); 2459 2460 return (acpi_wake_set_enable(dev, enable)); 2461 } 2462 2463 /* Parse a device's _PRW into a structure. */ 2464 int 2465 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw) 2466 { 2467 ACPI_STATUS status; 2468 ACPI_BUFFER prw_buffer; 2469 ACPI_OBJECT *res, *res2; 2470 int error, i, power_count; 2471 2472 if (h == NULL || prw == NULL) 2473 return (EINVAL); 2474 2475 /* 2476 * The _PRW object (7.2.9) is only required for devices that have the 2477 * ability to wake the system from a sleeping state. 2478 */ 2479 error = EINVAL; 2480 prw_buffer.Pointer = NULL; 2481 prw_buffer.Length = ACPI_ALLOCATE_BUFFER; 2482 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer); 2483 if (ACPI_FAILURE(status)) 2484 return (ENOENT); 2485 res = (ACPI_OBJECT *)prw_buffer.Pointer; 2486 if (res == NULL) 2487 return (ENOENT); 2488 if (!ACPI_PKG_VALID(res, 2)) 2489 goto out; 2490 2491 /* 2492 * Element 1 of the _PRW object: 2493 * The lowest power system sleeping state that can be entered while still 2494 * providing wake functionality. The sleeping state being entered must 2495 * be less than (i.e., higher power) or equal to this value. 2496 */ 2497 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0) 2498 goto out; 2499 2500 /* 2501 * Element 0 of the _PRW object: 2502 */ 2503 switch (res->Package.Elements[0].Type) { 2504 case ACPI_TYPE_INTEGER: 2505 /* 2506 * If the data type of this package element is numeric, then this 2507 * _PRW package element is the bit index in the GPEx_EN, in the 2508 * GPE blocks described in the FADT, of the enable bit that is 2509 * enabled for the wake event. 2510 */ 2511 prw->gpe_handle = NULL; 2512 prw->gpe_bit = res->Package.Elements[0].Integer.Value; 2513 error = 0; 2514 break; 2515 case ACPI_TYPE_PACKAGE: 2516 /* 2517 * If the data type of this package element is a package, then this 2518 * _PRW package element is itself a package containing two 2519 * elements. The first is an object reference to the GPE Block 2520 * device that contains the GPE that will be triggered by the wake 2521 * event. The second element is numeric and it contains the bit 2522 * index in the GPEx_EN, in the GPE Block referenced by the 2523 * first element in the package, of the enable bit that is enabled for 2524 * the wake event. 2525 * 2526 * For example, if this field is a package then it is of the form: 2527 * Package() {\_SB.PCI0.ISA.GPE, 2} 2528 */ 2529 res2 = &res->Package.Elements[0]; 2530 if (!ACPI_PKG_VALID(res2, 2)) 2531 goto out; 2532 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]); 2533 if (prw->gpe_handle == NULL) 2534 goto out; 2535 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0) 2536 goto out; 2537 error = 0; 2538 break; 2539 default: 2540 goto out; 2541 } 2542 2543 /* Elements 2 to N of the _PRW object are power resources. */ 2544 power_count = res->Package.Count - 2; 2545 if (power_count > ACPI_PRW_MAX_POWERRES) { 2546 printf("ACPI device %s has too many power resources\n", acpi_name(h)); 2547 power_count = 0; 2548 } 2549 prw->power_res_count = power_count; 2550 for (i = 0; i < power_count; i++) 2551 prw->power_res[i] = res->Package.Elements[i]; 2552 2553 out: 2554 if (prw_buffer.Pointer != NULL) 2555 AcpiOsFree(prw_buffer.Pointer); 2556 return (error); 2557 } 2558 2559 /* 2560 * ACPI Event Handlers 2561 */ 2562 2563 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */ 2564 2565 static void 2566 acpi_system_eventhandler_sleep(void *arg, int state) 2567 { 2568 2569 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2570 2571 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2572 acpi_SetSleepState((struct acpi_softc *)arg, state); 2573 2574 return_VOID; 2575 } 2576 2577 static void 2578 acpi_system_eventhandler_wakeup(void *arg, int state) 2579 { 2580 2581 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state); 2582 2583 /* Currently, nothing to do for wakeup. */ 2584 2585 return_VOID; 2586 } 2587 2588 /* 2589 * ACPICA Event Handlers (FixedEvent, also called from button notify handler) 2590 */ 2591 UINT32 2592 acpi_event_power_button_sleep(void *context) 2593 { 2594 struct acpi_softc *sc = (struct acpi_softc *)context; 2595 2596 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2597 2598 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx); 2599 2600 return_VALUE (ACPI_INTERRUPT_HANDLED); 2601 } 2602 2603 UINT32 2604 acpi_event_power_button_wake(void *context) 2605 { 2606 struct acpi_softc *sc = (struct acpi_softc *)context; 2607 2608 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2609 2610 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx); 2611 2612 return_VALUE (ACPI_INTERRUPT_HANDLED); 2613 } 2614 2615 UINT32 2616 acpi_event_sleep_button_sleep(void *context) 2617 { 2618 struct acpi_softc *sc = (struct acpi_softc *)context; 2619 2620 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2621 2622 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx); 2623 2624 return_VALUE (ACPI_INTERRUPT_HANDLED); 2625 } 2626 2627 UINT32 2628 acpi_event_sleep_button_wake(void *context) 2629 { 2630 struct acpi_softc *sc = (struct acpi_softc *)context; 2631 2632 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 2633 2634 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx); 2635 2636 return_VALUE (ACPI_INTERRUPT_HANDLED); 2637 } 2638 2639 /* 2640 * XXX This static buffer is suboptimal. There is no locking so only 2641 * use this for single-threaded callers. 2642 */ 2643 char * 2644 acpi_name(ACPI_HANDLE handle) 2645 { 2646 ACPI_BUFFER buf; 2647 static char data[256]; 2648 2649 buf.Length = sizeof(data); 2650 buf.Pointer = data; 2651 2652 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf))) 2653 return (data); 2654 return ("(unknown)"); 2655 } 2656 2657 /* 2658 * Debugging/bug-avoidance. Avoid trying to fetch info on various 2659 * parts of the namespace. 2660 */ 2661 int 2662 acpi_avoid(ACPI_HANDLE handle) 2663 { 2664 char *cp, *env, *np; 2665 int len; 2666 2667 np = acpi_name(handle); 2668 if (*np == '\\') 2669 np++; 2670 if ((env = getenv("debug.acpi.avoid")) == NULL) 2671 return (0); 2672 2673 /* Scan the avoid list checking for a match */ 2674 cp = env; 2675 for (;;) { 2676 while (*cp != 0 && isspace(*cp)) 2677 cp++; 2678 if (*cp == 0) 2679 break; 2680 len = 0; 2681 while (cp[len] != 0 && !isspace(cp[len])) 2682 len++; 2683 if (!strncmp(cp, np, len)) { 2684 freeenv(env); 2685 return(1); 2686 } 2687 cp += len; 2688 } 2689 freeenv(env); 2690 2691 return (0); 2692 } 2693 2694 /* 2695 * Debugging/bug-avoidance. Disable ACPI subsystem components. 2696 */ 2697 int 2698 acpi_disabled(char *subsys) 2699 { 2700 char *cp, *env; 2701 int len; 2702 2703 if ((env = getenv("debug.acpi.disabled")) == NULL) 2704 return (0); 2705 if (strcmp(env, "all") == 0) { 2706 freeenv(env); 2707 return (1); 2708 } 2709 2710 /* Scan the disable list, checking for a match. */ 2711 cp = env; 2712 for (;;) { 2713 while (*cp != '\0' && isspace(*cp)) 2714 cp++; 2715 if (*cp == '\0') 2716 break; 2717 len = 0; 2718 while (cp[len] != '\0' && !isspace(cp[len])) 2719 len++; 2720 if (strncmp(cp, subsys, len) == 0) { 2721 freeenv(env); 2722 return (1); 2723 } 2724 cp += len; 2725 } 2726 freeenv(env); 2727 2728 return (0); 2729 } 2730 2731 /* 2732 * Control interface. 2733 * 2734 * We multiplex ioctls for all participating ACPI devices here. Individual 2735 * drivers wanting to be accessible via /dev/acpi should use the 2736 * register/deregister interface to make their handlers visible. 2737 */ 2738 struct acpi_ioctl_hook 2739 { 2740 TAILQ_ENTRY(acpi_ioctl_hook) link; 2741 u_long cmd; 2742 acpi_ioctl_fn fn; 2743 void *arg; 2744 }; 2745 2746 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks; 2747 static int acpi_ioctl_hooks_initted; 2748 2749 int 2750 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg) 2751 { 2752 struct acpi_ioctl_hook *hp; 2753 2754 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL) 2755 return (ENOMEM); 2756 hp->cmd = cmd; 2757 hp->fn = fn; 2758 hp->arg = arg; 2759 2760 ACPI_LOCK(acpi); 2761 if (acpi_ioctl_hooks_initted == 0) { 2762 TAILQ_INIT(&acpi_ioctl_hooks); 2763 acpi_ioctl_hooks_initted = 1; 2764 } 2765 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link); 2766 ACPI_UNLOCK(acpi); 2767 2768 return (0); 2769 } 2770 2771 void 2772 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn) 2773 { 2774 struct acpi_ioctl_hook *hp; 2775 2776 ACPI_LOCK(acpi); 2777 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) 2778 if (hp->cmd == cmd && hp->fn == fn) 2779 break; 2780 2781 if (hp != NULL) { 2782 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link); 2783 free(hp, M_ACPIDEV); 2784 } 2785 ACPI_UNLOCK(acpi); 2786 } 2787 2788 static int 2789 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2790 { 2791 return (0); 2792 } 2793 2794 static int 2795 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 2796 { 2797 return (0); 2798 } 2799 2800 static int 2801 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 2802 { 2803 struct acpi_softc *sc; 2804 struct acpi_ioctl_hook *hp; 2805 int error, state; 2806 2807 error = 0; 2808 hp = NULL; 2809 sc = dev->si_drv1; 2810 2811 /* 2812 * Scan the list of registered ioctls, looking for handlers. 2813 */ 2814 ACPI_LOCK(acpi); 2815 if (acpi_ioctl_hooks_initted) 2816 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) { 2817 if (hp->cmd == cmd) 2818 break; 2819 } 2820 ACPI_UNLOCK(acpi); 2821 if (hp) 2822 return (hp->fn(cmd, addr, hp->arg)); 2823 2824 /* 2825 * Core ioctls are not permitted for non-writable user. 2826 * Currently, other ioctls just fetch information. 2827 * Not changing system behavior. 2828 */ 2829 if ((flag & FWRITE) == 0) 2830 return (EPERM); 2831 2832 /* Core system ioctls. */ 2833 switch (cmd) { 2834 case ACPIIO_SETSLPSTATE: 2835 error = EINVAL; 2836 state = *(int *)addr; 2837 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX) 2838 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state))) 2839 error = 0; 2840 break; 2841 default: 2842 error = ENXIO; 2843 break; 2844 } 2845 2846 return (error); 2847 } 2848 2849 static int 2850 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2851 { 2852 int error; 2853 struct sbuf sb; 2854 UINT8 state, TypeA, TypeB; 2855 2856 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND); 2857 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++) 2858 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) 2859 sbuf_printf(&sb, "S%d ", state); 2860 sbuf_trim(&sb); 2861 sbuf_finish(&sb); 2862 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req); 2863 sbuf_delete(&sb); 2864 return (error); 2865 } 2866 2867 static int 2868 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS) 2869 { 2870 char sleep_state[10]; 2871 int error; 2872 u_int new_state, old_state; 2873 2874 old_state = *(u_int *)oidp->oid_arg1; 2875 if (old_state > ACPI_S_STATES_MAX + 1) 2876 strlcpy(sleep_state, "unknown", sizeof(sleep_state)); 2877 else 2878 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state)); 2879 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req); 2880 if (error == 0 && req->newptr != NULL) { 2881 new_state = ACPI_STATE_S0; 2882 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++) 2883 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0) 2884 break; 2885 if (new_state <= ACPI_S_STATES_MAX + 1) { 2886 if (new_state != old_state) 2887 *(u_int *)oidp->oid_arg1 = new_state; 2888 } else 2889 error = EINVAL; 2890 } 2891 2892 return (error); 2893 } 2894 2895 /* Inform devctl(4) when we receive a Notify. */ 2896 void 2897 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify) 2898 { 2899 char notify_buf[16]; 2900 ACPI_BUFFER handle_buf; 2901 ACPI_STATUS status; 2902 2903 if (subsystem == NULL) 2904 return; 2905 2906 handle_buf.Pointer = NULL; 2907 handle_buf.Length = ACPI_ALLOCATE_BUFFER; 2908 status = AcpiNsHandleToPathname(h, &handle_buf); 2909 if (ACPI_FAILURE(status)) 2910 return; 2911 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify); 2912 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf); 2913 AcpiOsFree(handle_buf.Pointer); 2914 } 2915 2916 #ifdef ACPI_DEBUG 2917 /* 2918 * Support for parsing debug options from the kernel environment. 2919 * 2920 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers 2921 * by specifying the names of the bits in the debug.acpi.layer and 2922 * debug.acpi.level environment variables. Bits may be unset by 2923 * prefixing the bit name with !. 2924 */ 2925 struct debugtag 2926 { 2927 char *name; 2928 UINT32 value; 2929 }; 2930 2931 static struct debugtag dbg_layer[] = { 2932 {"ACPI_UTILITIES", ACPI_UTILITIES}, 2933 {"ACPI_HARDWARE", ACPI_HARDWARE}, 2934 {"ACPI_EVENTS", ACPI_EVENTS}, 2935 {"ACPI_TABLES", ACPI_TABLES}, 2936 {"ACPI_NAMESPACE", ACPI_NAMESPACE}, 2937 {"ACPI_PARSER", ACPI_PARSER}, 2938 {"ACPI_DISPATCHER", ACPI_DISPATCHER}, 2939 {"ACPI_EXECUTER", ACPI_EXECUTER}, 2940 {"ACPI_RESOURCES", ACPI_RESOURCES}, 2941 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER}, 2942 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES}, 2943 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER}, 2944 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS}, 2945 2946 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER}, 2947 {"ACPI_BATTERY", ACPI_BATTERY}, 2948 {"ACPI_BUS", ACPI_BUS}, 2949 {"ACPI_BUTTON", ACPI_BUTTON}, 2950 {"ACPI_EC", ACPI_EC}, 2951 {"ACPI_FAN", ACPI_FAN}, 2952 {"ACPI_POWERRES", ACPI_POWERRES}, 2953 {"ACPI_PROCESSOR", ACPI_PROCESSOR}, 2954 {"ACPI_THERMAL", ACPI_THERMAL}, 2955 {"ACPI_TIMER", ACPI_TIMER}, 2956 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS}, 2957 {NULL, 0} 2958 }; 2959 2960 static struct debugtag dbg_level[] = { 2961 {"ACPI_LV_ERROR", ACPI_LV_ERROR}, 2962 {"ACPI_LV_WARN", ACPI_LV_WARN}, 2963 {"ACPI_LV_INIT", ACPI_LV_INIT}, 2964 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT}, 2965 {"ACPI_LV_INFO", ACPI_LV_INFO}, 2966 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS}, 2967 2968 /* Trace verbosity level 1 [Standard Trace Level] */ 2969 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES}, 2970 {"ACPI_LV_PARSE", ACPI_LV_PARSE}, 2971 {"ACPI_LV_LOAD", ACPI_LV_LOAD}, 2972 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH}, 2973 {"ACPI_LV_EXEC", ACPI_LV_EXEC}, 2974 {"ACPI_LV_NAMES", ACPI_LV_NAMES}, 2975 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION}, 2976 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD}, 2977 {"ACPI_LV_TABLES", ACPI_LV_TABLES}, 2978 {"ACPI_LV_VALUES", ACPI_LV_VALUES}, 2979 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS}, 2980 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES}, 2981 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS}, 2982 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE}, 2983 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1}, 2984 2985 /* Trace verbosity level 2 [Function tracing and memory allocation] */ 2986 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS}, 2987 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS}, 2988 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS}, 2989 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2}, 2990 {"ACPI_LV_ALL", ACPI_LV_ALL}, 2991 2992 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */ 2993 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX}, 2994 {"ACPI_LV_THREADS", ACPI_LV_THREADS}, 2995 {"ACPI_LV_IO", ACPI_LV_IO}, 2996 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS}, 2997 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3}, 2998 2999 /* Exceptionally verbose output -- also used in the global "DebugLevel" */ 3000 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE}, 3001 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO}, 3002 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES}, 3003 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS}, 3004 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE}, 3005 {NULL, 0} 3006 }; 3007 3008 static void 3009 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag) 3010 { 3011 char *ep; 3012 int i, l; 3013 int set; 3014 3015 while (*cp) { 3016 if (isspace(*cp)) { 3017 cp++; 3018 continue; 3019 } 3020 ep = cp; 3021 while (*ep && !isspace(*ep)) 3022 ep++; 3023 if (*cp == '!') { 3024 set = 0; 3025 cp++; 3026 if (cp == ep) 3027 continue; 3028 } else { 3029 set = 1; 3030 } 3031 l = ep - cp; 3032 for (i = 0; tag[i].name != NULL; i++) { 3033 if (!strncmp(cp, tag[i].name, l)) { 3034 if (set) 3035 *flag |= tag[i].value; 3036 else 3037 *flag &= ~tag[i].value; 3038 } 3039 } 3040 cp = ep; 3041 } 3042 } 3043 3044 static void 3045 acpi_set_debugging(void *junk) 3046 { 3047 char *layer, *level; 3048 3049 if (cold) { 3050 AcpiDbgLayer = 0; 3051 AcpiDbgLevel = 0; 3052 } 3053 3054 layer = getenv("debug.acpi.layer"); 3055 level = getenv("debug.acpi.level"); 3056 if (layer == NULL && level == NULL) 3057 return; 3058 3059 printf("ACPI set debug"); 3060 if (layer != NULL) { 3061 if (strcmp("NONE", layer) != 0) 3062 printf(" layer '%s'", layer); 3063 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer); 3064 freeenv(layer); 3065 } 3066 if (level != NULL) { 3067 if (strcmp("NONE", level) != 0) 3068 printf(" level '%s'", level); 3069 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel); 3070 freeenv(level); 3071 } 3072 printf("\n"); 3073 } 3074 3075 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging, 3076 NULL); 3077 3078 static int 3079 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS) 3080 { 3081 int error, *dbg; 3082 struct debugtag *tag; 3083 struct sbuf sb; 3084 3085 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL) 3086 return (ENOMEM); 3087 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) { 3088 tag = &dbg_layer[0]; 3089 dbg = &AcpiDbgLayer; 3090 } else { 3091 tag = &dbg_level[0]; 3092 dbg = &AcpiDbgLevel; 3093 } 3094 3095 /* Get old values if this is a get request. */ 3096 ACPI_SERIAL_BEGIN(acpi); 3097 if (*dbg == 0) { 3098 sbuf_cpy(&sb, "NONE"); 3099 } else if (req->newptr == NULL) { 3100 for (; tag->name != NULL; tag++) { 3101 if ((*dbg & tag->value) == tag->value) 3102 sbuf_printf(&sb, "%s ", tag->name); 3103 } 3104 } 3105 sbuf_trim(&sb); 3106 sbuf_finish(&sb); 3107 3108 /* Copy out the old values to the user. */ 3109 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb)); 3110 sbuf_delete(&sb); 3111 3112 /* If the user is setting a string, parse it. */ 3113 if (error == 0 && req->newptr != NULL) { 3114 *dbg = 0; 3115 setenv((char *)oidp->oid_arg1, (char *)req->newptr); 3116 acpi_set_debugging(NULL); 3117 } 3118 ACPI_SERIAL_END(acpi); 3119 3120 return (error); 3121 } 3122 3123 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING, 3124 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", ""); 3125 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING, 3126 "debug.acpi.level", 0, acpi_debug_sysctl, "A", ""); 3127 #endif /* ACPI_DEBUG */ 3128 3129 static int 3130 acpi_pm_func(u_long cmd, void *arg, ...) 3131 { 3132 int state, acpi_state; 3133 int error; 3134 struct acpi_softc *sc; 3135 va_list ap; 3136 3137 error = 0; 3138 switch (cmd) { 3139 case POWER_CMD_SUSPEND: 3140 sc = (struct acpi_softc *)arg; 3141 if (sc == NULL) { 3142 error = EINVAL; 3143 goto out; 3144 } 3145 3146 va_start(ap, arg); 3147 state = va_arg(ap, int); 3148 va_end(ap); 3149 3150 switch (state) { 3151 case POWER_SLEEP_STATE_STANDBY: 3152 acpi_state = sc->acpi_standby_sx; 3153 break; 3154 case POWER_SLEEP_STATE_SUSPEND: 3155 acpi_state = sc->acpi_suspend_sx; 3156 break; 3157 case POWER_SLEEP_STATE_HIBERNATE: 3158 acpi_state = ACPI_STATE_S4; 3159 break; 3160 default: 3161 error = EINVAL; 3162 goto out; 3163 } 3164 3165 acpi_SetSleepState(sc, acpi_state); 3166 break; 3167 default: 3168 error = EINVAL; 3169 goto out; 3170 } 3171 3172 out: 3173 return (error); 3174 } 3175 3176 static void 3177 acpi_pm_register(void *arg) 3178 { 3179 if (!cold || resource_disabled("acpi", 0)) 3180 return; 3181 3182 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL); 3183 } 3184 3185 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0); 3186