FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi.c
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: releng/8.3/sys/dev/acpica/acpi.c 231759 2012-02-15 14:23:01Z ken $");
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/sched.h>
50 #include <sys/smp.h>
51 #include <sys/timetc.h>
52
53 #if defined(__i386__) || defined(__amd64__)
54 #include <machine/pci_cfgreg.h>
55 #endif
56 #include <machine/resource.h>
57 #include <machine/bus.h>
58 #include <sys/rman.h>
59 #include <isa/isavar.h>
60 #include <isa/pnpvar.h>
61
62 #include <contrib/dev/acpica/include/acpi.h>
63 #include <contrib/dev/acpica/include/accommon.h>
64 #include <contrib/dev/acpica/include/acnamesp.h>
65
66 #include <dev/acpica/acpivar.h>
67 #include <dev/acpica/acpiio.h>
68
69 #include "pci_if.h"
70 #include <dev/pci/pcivar.h>
71 #include <dev/pci/pci_private.h>
72
73 #include <vm/vm_param.h>
74
75 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
76
77 /* Hooks for the ACPI CA debugging infrastructure */
78 #define _COMPONENT ACPI_BUS
79 ACPI_MODULE_NAME("ACPI")
80
81 static d_open_t acpiopen;
82 static d_close_t acpiclose;
83 static d_ioctl_t acpiioctl;
84
85 static struct cdevsw acpi_cdevsw = {
86 .d_version = D_VERSION,
87 .d_open = acpiopen,
88 .d_close = acpiclose,
89 .d_ioctl = acpiioctl,
90 .d_name = "acpi",
91 };
92
93 struct acpi_interface {
94 ACPI_STRING *data;
95 int num;
96 };
97
98 /* Global mutex for locking access to the ACPI subsystem. */
99 struct mtx acpi_mutex;
100
101 /* Bitmap of device quirks. */
102 int acpi_quirks;
103
104 /* Supported sleep states. */
105 static BOOLEAN acpi_sleep_states[ACPI_S_STATE_COUNT];
106
107 static int acpi_modevent(struct module *mod, int event, void *junk);
108 static int acpi_probe(device_t dev);
109 static int acpi_attach(device_t dev);
110 static int acpi_suspend(device_t dev);
111 static int acpi_resume(device_t dev);
112 static int acpi_shutdown(device_t dev);
113 static device_t acpi_add_child(device_t bus, u_int order, const char *name,
114 int unit);
115 static int acpi_print_child(device_t bus, device_t child);
116 static void acpi_probe_nomatch(device_t bus, device_t child);
117 static void acpi_driver_added(device_t dev, driver_t *driver);
118 static int acpi_read_ivar(device_t dev, device_t child, int index,
119 uintptr_t *result);
120 static int acpi_write_ivar(device_t dev, device_t child, int index,
121 uintptr_t value);
122 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
123 static int acpi_sysres_alloc(device_t dev);
124 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
125 int type, int *rid, u_long start, u_long end,
126 u_long count, u_int flags);
127 static int acpi_adjust_resource(device_t bus, device_t child, int type,
128 struct resource *r, u_long start, u_long end);
129 static int acpi_release_resource(device_t bus, device_t child, int type,
130 int rid, struct resource *r);
131 static void acpi_delete_resource(device_t bus, device_t child, int type,
132 int rid);
133 static uint32_t acpi_isa_get_logicalid(device_t dev);
134 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
135 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
136 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
137 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
138 ACPI_BUFFER *ret);
139 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
140 int *dstate);
141 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
142 void *context, void **retval);
143 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
144 int max_depth, acpi_scan_cb_t user_fn, void *arg);
145 static int acpi_set_powerstate_method(device_t bus, device_t child,
146 int state);
147 static int acpi_isa_pnp_probe(device_t bus, device_t child,
148 struct isa_pnp_id *ids);
149 static void acpi_probe_children(device_t bus);
150 static void acpi_probe_order(ACPI_HANDLE handle, int *order);
151 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
152 void *context, void **status);
153 static void acpi_sleep_enable(void *arg);
154 static ACPI_STATUS acpi_sleep_disable(struct acpi_softc *sc);
155 static ACPI_STATUS acpi_EnterSleepState(struct acpi_softc *sc, int state);
156 static void acpi_shutdown_final(void *arg, int howto);
157 static void acpi_enable_fixed_events(struct acpi_softc *sc);
158 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
159 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
160 static int acpi_wake_prep_walk(int sstate);
161 static int acpi_wake_sysctl_walk(device_t dev);
162 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
163 static void acpi_system_eventhandler_sleep(void *arg, int state);
164 static void acpi_system_eventhandler_wakeup(void *arg, int state);
165 static int acpi_sname2sstate(const char *sname);
166 static const char *acpi_sstate2sname(int sstate);
167 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
168 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
169 static int acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS);
170 static int acpi_pm_func(u_long cmd, void *arg, ...);
171 static int acpi_child_location_str_method(device_t acdev, device_t child,
172 char *buf, size_t buflen);
173 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
174 char *buf, size_t buflen);
175 #if defined(__i386__) || defined(__amd64__)
176 static void acpi_enable_pcie(void);
177 #endif
178 static void acpi_hint_device_unit(device_t acdev, device_t child,
179 const char *name, int *unitp);
180 static void acpi_reset_interfaces(device_t dev);
181
182 static device_method_t acpi_methods[] = {
183 /* Device interface */
184 DEVMETHOD(device_probe, acpi_probe),
185 DEVMETHOD(device_attach, acpi_attach),
186 DEVMETHOD(device_shutdown, acpi_shutdown),
187 DEVMETHOD(device_detach, bus_generic_detach),
188 DEVMETHOD(device_suspend, acpi_suspend),
189 DEVMETHOD(device_resume, acpi_resume),
190
191 /* Bus interface */
192 DEVMETHOD(bus_add_child, acpi_add_child),
193 DEVMETHOD(bus_print_child, acpi_print_child),
194 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
195 DEVMETHOD(bus_driver_added, acpi_driver_added),
196 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
197 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
198 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
199 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
200 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
201 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
202 DEVMETHOD(bus_adjust_resource, acpi_adjust_resource),
203 DEVMETHOD(bus_release_resource, acpi_release_resource),
204 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
205 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
206 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
207 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
208 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
209 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
210 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
211 DEVMETHOD(bus_hint_device_unit, acpi_hint_device_unit),
212
213 /* ACPI bus */
214 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
215 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
216 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
217 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
218
219 /* PCI emulation */
220 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
221
222 /* ISA emulation */
223 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
224
225 {0, 0}
226 };
227
228 static driver_t acpi_driver = {
229 "acpi",
230 acpi_methods,
231 sizeof(struct acpi_softc),
232 };
233
234 static devclass_t acpi_devclass;
235 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
236 MODULE_VERSION(acpi, 1);
237
238 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
239
240 /* Local pools for managing system resources for ACPI child devices. */
241 static struct rman acpi_rman_io, acpi_rman_mem;
242
243 #define ACPI_MINIMUM_AWAKETIME 5
244
245 /* Holds the description of the acpi0 device. */
246 static char acpi_desc[ACPI_OEM_ID_SIZE + ACPI_OEM_TABLE_ID_SIZE + 2];
247
248 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
249 static char acpi_ca_version[12];
250 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
251 acpi_ca_version, 0, "Version of Intel ACPI-CA");
252
253 /*
254 * Allow overriding _OSI methods.
255 */
256 static char acpi_install_interface[256];
257 TUNABLE_STR("hw.acpi.install_interface", acpi_install_interface,
258 sizeof(acpi_install_interface));
259 static char acpi_remove_interface[256];
260 TUNABLE_STR("hw.acpi.remove_interface", acpi_remove_interface,
261 sizeof(acpi_remove_interface));
262
263 /*
264 * Allow override of whether methods execute in parallel or not.
265 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
266 * errors for AML that really can't handle parallel method execution.
267 * It is off by default since this breaks recursive methods and
268 * some IBMs use such code.
269 */
270 static int acpi_serialize_methods;
271 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
272
273 /* Allow users to dump Debug objects without ACPI debugger. */
274 static int acpi_debug_objects;
275 TUNABLE_INT("debug.acpi.enable_debug_objects", &acpi_debug_objects);
276 SYSCTL_PROC(_debug_acpi, OID_AUTO, enable_debug_objects,
277 CTLFLAG_RW | CTLTYPE_INT, NULL, 0, acpi_debug_objects_sysctl, "I",
278 "Enable Debug objects");
279
280 /* Allow the interpreter to ignore common mistakes in BIOS. */
281 static int acpi_interpreter_slack = 1;
282 TUNABLE_INT("debug.acpi.interpreter_slack", &acpi_interpreter_slack);
283 SYSCTL_INT(_debug_acpi, OID_AUTO, interpreter_slack, CTLFLAG_RDTUN,
284 &acpi_interpreter_slack, 1, "Turn on interpreter slack mode.");
285
286 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
287 static int acpi_do_powerstate = 1;
288 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
289 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
290 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
291
292 /* Reset system clock while resuming. XXX Remove once tested. */
293 static int acpi_reset_clock = 1;
294 TUNABLE_INT("debug.acpi.reset_clock", &acpi_reset_clock);
295 SYSCTL_INT(_debug_acpi, OID_AUTO, reset_clock, CTLFLAG_RW,
296 &acpi_reset_clock, 1, "Reset system clock while resuming.");
297
298 /* Allow users to override quirks. */
299 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
300
301 static int acpi_susp_bounce;
302 SYSCTL_INT(_debug_acpi, OID_AUTO, suspend_bounce, CTLFLAG_RW,
303 &acpi_susp_bounce, 0, "Don't actually suspend, just test devices.");
304
305 /*
306 * ACPI can only be loaded as a module by the loader; activating it after
307 * system bootstrap time is not useful, and can be fatal to the system.
308 * It also cannot be unloaded, since the entire system bus hierarchy hangs
309 * off it.
310 */
311 static int
312 acpi_modevent(struct module *mod, int event, void *junk)
313 {
314 switch (event) {
315 case MOD_LOAD:
316 if (!cold) {
317 printf("The ACPI driver cannot be loaded after boot.\n");
318 return (EPERM);
319 }
320 break;
321 case MOD_UNLOAD:
322 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
323 return (EBUSY);
324 break;
325 default:
326 break;
327 }
328 return (0);
329 }
330
331 /*
332 * Perform early initialization.
333 */
334 ACPI_STATUS
335 acpi_Startup(void)
336 {
337 static int started = 0;
338 ACPI_STATUS status;
339 int val;
340
341 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
342
343 /* Only run the startup code once. The MADT driver also calls this. */
344 if (started)
345 return_VALUE (AE_OK);
346 started = 1;
347
348 /*
349 * Pre-allocate space for RSDT/XSDT and DSDT tables and allow resizing
350 * if more tables exist.
351 */
352 if (ACPI_FAILURE(status = AcpiInitializeTables(NULL, 2, TRUE))) {
353 printf("ACPI: Table initialisation failed: %s\n",
354 AcpiFormatException(status));
355 return_VALUE (status);
356 }
357
358 /* Set up any quirks we have for this system. */
359 if (acpi_quirks == ACPI_Q_OK)
360 acpi_table_quirks(&acpi_quirks);
361
362 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
363 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
364 acpi_quirks &= ~ACPI_Q_BROKEN;
365 if (acpi_quirks & ACPI_Q_BROKEN) {
366 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
367 status = AE_SUPPORT;
368 }
369
370 return_VALUE (status);
371 }
372
373 /*
374 * Detect ACPI and perform early initialisation.
375 */
376 int
377 acpi_identify(void)
378 {
379 ACPI_TABLE_RSDP *rsdp;
380 ACPI_TABLE_HEADER *rsdt;
381 ACPI_PHYSICAL_ADDRESS paddr;
382 struct sbuf sb;
383
384 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
385
386 if (!cold)
387 return (ENXIO);
388
389 /* Check that we haven't been disabled with a hint. */
390 if (resource_disabled("acpi", 0))
391 return (ENXIO);
392
393 /* Check for other PM systems. */
394 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
395 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
396 printf("ACPI identify failed, other PM system enabled.\n");
397 return (ENXIO);
398 }
399
400 /* Initialize root tables. */
401 if (ACPI_FAILURE(acpi_Startup())) {
402 printf("ACPI: Try disabling either ACPI or apic support.\n");
403 return (ENXIO);
404 }
405
406 if ((paddr = AcpiOsGetRootPointer()) == 0 ||
407 (rsdp = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_RSDP))) == NULL)
408 return (ENXIO);
409 if (rsdp->Revision > 1 && rsdp->XsdtPhysicalAddress != 0)
410 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->XsdtPhysicalAddress;
411 else
412 paddr = (ACPI_PHYSICAL_ADDRESS)rsdp->RsdtPhysicalAddress;
413 AcpiOsUnmapMemory(rsdp, sizeof(ACPI_TABLE_RSDP));
414
415 if ((rsdt = AcpiOsMapMemory(paddr, sizeof(ACPI_TABLE_HEADER))) == NULL)
416 return (ENXIO);
417 sbuf_new(&sb, acpi_desc, sizeof(acpi_desc), SBUF_FIXEDLEN);
418 sbuf_bcat(&sb, rsdt->OemId, ACPI_OEM_ID_SIZE);
419 sbuf_trim(&sb);
420 sbuf_putc(&sb, ' ');
421 sbuf_bcat(&sb, rsdt->OemTableId, ACPI_OEM_TABLE_ID_SIZE);
422 sbuf_trim(&sb);
423 sbuf_finish(&sb);
424 sbuf_delete(&sb);
425 AcpiOsUnmapMemory(rsdt, sizeof(ACPI_TABLE_HEADER));
426
427 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%x", ACPI_CA_VERSION);
428
429 return (0);
430 }
431
432 /*
433 * Fetch some descriptive data from ACPI to put in our attach message.
434 */
435 static int
436 acpi_probe(device_t dev)
437 {
438
439 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
440
441 device_set_desc(dev, acpi_desc);
442
443 return_VALUE (0);
444 }
445
446 static int
447 acpi_attach(device_t dev)
448 {
449 struct acpi_softc *sc;
450 ACPI_STATUS status;
451 int error, state;
452 UINT32 flags;
453 UINT8 TypeA, TypeB;
454 char *env;
455
456 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
457
458 sc = device_get_softc(dev);
459 sc->acpi_dev = dev;
460 callout_init(&sc->susp_force_to, TRUE);
461
462 error = ENXIO;
463
464 /* Initialize resource manager. */
465 acpi_rman_io.rm_type = RMAN_ARRAY;
466 acpi_rman_io.rm_start = 0;
467 acpi_rman_io.rm_end = 0xffff;
468 acpi_rman_io.rm_descr = "ACPI I/O ports";
469 if (rman_init(&acpi_rman_io) != 0)
470 panic("acpi rman_init IO ports failed");
471 acpi_rman_mem.rm_type = RMAN_ARRAY;
472 acpi_rman_mem.rm_start = 0;
473 acpi_rman_mem.rm_end = ~0ul;
474 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
475 if (rman_init(&acpi_rman_mem) != 0)
476 panic("acpi rman_init memory failed");
477
478 /* Initialise the ACPI mutex */
479 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
480
481 /*
482 * Set the globals from our tunables. This is needed because ACPI-CA
483 * uses UINT8 for some values and we have no tunable_byte.
484 */
485 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods ? TRUE : FALSE;
486 AcpiGbl_EnableInterpreterSlack = acpi_interpreter_slack ? TRUE : FALSE;
487 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
488
489 #ifndef ACPI_DEBUG
490 /*
491 * Disable all debugging layers and levels.
492 */
493 AcpiDbgLayer = 0;
494 AcpiDbgLevel = 0;
495 #endif
496
497 /* Start up the ACPI CA subsystem. */
498 status = AcpiInitializeSubsystem();
499 if (ACPI_FAILURE(status)) {
500 device_printf(dev, "Could not initialize Subsystem: %s\n",
501 AcpiFormatException(status));
502 goto out;
503 }
504
505 /* Override OS interfaces if the user requested. */
506 acpi_reset_interfaces(dev);
507
508 /* Load ACPI name space. */
509 status = AcpiLoadTables();
510 if (ACPI_FAILURE(status)) {
511 device_printf(dev, "Could not load Namespace: %s\n",
512 AcpiFormatException(status));
513 goto out;
514 }
515
516 #if defined(__i386__) || defined(__amd64__)
517 /* Handle MCFG table if present. */
518 acpi_enable_pcie();
519 #endif
520
521 /*
522 * Note that some systems (specifically, those with namespace evaluation
523 * issues that require the avoidance of parts of the namespace) must
524 * avoid running _INI and _STA on everything, as well as dodging the final
525 * object init pass.
526 *
527 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
528 *
529 * XXX We should arrange for the object init pass after we have attached
530 * all our child devices, but on many systems it works here.
531 */
532 flags = 0;
533 if (testenv("debug.acpi.avoid"))
534 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
535
536 /* Bring the hardware and basic handlers online. */
537 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
538 device_printf(dev, "Could not enable ACPI: %s\n",
539 AcpiFormatException(status));
540 goto out;
541 }
542
543 /*
544 * Call the ECDT probe function to provide EC functionality before
545 * the namespace has been evaluated.
546 *
547 * XXX This happens before the sysresource devices have been probed and
548 * attached so its resources come from nexus0. In practice, this isn't
549 * a problem but should be addressed eventually.
550 */
551 acpi_ec_ecdt_probe(dev);
552
553 /* Bring device objects and regions online. */
554 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
555 device_printf(dev, "Could not initialize ACPI objects: %s\n",
556 AcpiFormatException(status));
557 goto out;
558 }
559
560 /*
561 * Setup our sysctl tree.
562 *
563 * XXX: This doesn't check to make sure that none of these fail.
564 */
565 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
566 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
567 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
568 device_get_name(dev), CTLFLAG_RD, 0, "");
569 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
570 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
571 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
572 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
573 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
574 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
575 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
576 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
577 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
578 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
579 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
580 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
581 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
582 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
583 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
584 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
585 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
586 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
587 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
588 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
589 "sleep delay in seconds");
590 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
591 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
592 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
593 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
594 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
595 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
596 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
597 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
598 OID_AUTO, "handle_reboot", CTLFLAG_RW,
599 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
600
601 /*
602 * Default to 1 second before sleeping to give some machines time to
603 * stabilize.
604 */
605 sc->acpi_sleep_delay = 1;
606 if (bootverbose)
607 sc->acpi_verbose = 1;
608 if ((env = getenv("hw.acpi.verbose")) != NULL) {
609 if (strcmp(env, "") != 0)
610 sc->acpi_verbose = 1;
611 freeenv(env);
612 }
613
614 /* Only enable reboot by default if the FADT says it is available. */
615 if (AcpiGbl_FADT.Flags & ACPI_FADT_RESET_REGISTER)
616 sc->acpi_handle_reboot = 1;
617
618 /* Only enable S4BIOS by default if the FACS says it is available. */
619 if (AcpiGbl_FACS->Flags & ACPI_FACS_S4_BIOS_PRESENT)
620 sc->acpi_s4bios = 1;
621
622 /* Probe all supported sleep states. */
623 acpi_sleep_states[ACPI_STATE_S0] = TRUE;
624 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
625 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
626 acpi_sleep_states[state] = TRUE;
627
628 /*
629 * Dispatch the default sleep state to devices. The lid switch is set
630 * to UNKNOWN by default to avoid surprising users.
631 */
632 sc->acpi_power_button_sx = acpi_sleep_states[ACPI_STATE_S5] ?
633 ACPI_STATE_S5 : ACPI_STATE_UNKNOWN;
634 sc->acpi_lid_switch_sx = ACPI_STATE_UNKNOWN;
635 sc->acpi_standby_sx = acpi_sleep_states[ACPI_STATE_S1] ?
636 ACPI_STATE_S1 : ACPI_STATE_UNKNOWN;
637 sc->acpi_suspend_sx = acpi_sleep_states[ACPI_STATE_S3] ?
638 ACPI_STATE_S3 : ACPI_STATE_UNKNOWN;
639
640 /* Pick the first valid sleep state for the sleep button default. */
641 sc->acpi_sleep_button_sx = ACPI_STATE_UNKNOWN;
642 for (state = ACPI_STATE_S1; state <= ACPI_STATE_S4; state++)
643 if (acpi_sleep_states[state]) {
644 sc->acpi_sleep_button_sx = state;
645 break;
646 }
647
648 acpi_enable_fixed_events(sc);
649
650 /*
651 * Scan the namespace and attach/initialise children.
652 */
653
654 /* Register our shutdown handler. */
655 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
656 SHUTDOWN_PRI_LAST);
657
658 /*
659 * Register our acpi event handlers.
660 * XXX should be configurable eg. via userland policy manager.
661 */
662 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
663 sc, ACPI_EVENT_PRI_LAST);
664 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
665 sc, ACPI_EVENT_PRI_LAST);
666
667 /* Flag our initial states. */
668 sc->acpi_enabled = TRUE;
669 sc->acpi_sstate = ACPI_STATE_S0;
670 sc->acpi_sleep_disabled = TRUE;
671
672 /* Create the control device */
673 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
674 "acpi");
675 sc->acpi_dev_t->si_drv1 = sc;
676
677 if ((error = acpi_machdep_init(dev)))
678 goto out;
679
680 /* Register ACPI again to pass the correct argument of pm_func. */
681 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
682
683 if (!acpi_disabled("bus"))
684 acpi_probe_children(dev);
685
686 /* Allow sleep request after a while. */
687 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
688
689 error = 0;
690
691 out:
692 return_VALUE (error);
693 }
694
695 static int
696 acpi_suspend(device_t dev)
697 {
698 device_t child, *devlist;
699 int error, i, numdevs, pstate;
700
701 GIANT_REQUIRED;
702
703 /* First give child devices a chance to suspend. */
704 error = bus_generic_suspend(dev);
705 if (error)
706 return (error);
707
708 /*
709 * Now, set them into the appropriate power state, usually D3. If the
710 * device has an _SxD method for the next sleep state, use that power
711 * state instead.
712 */
713 error = device_get_children(dev, &devlist, &numdevs);
714 if (error)
715 return (error);
716 for (i = 0; i < numdevs; i++) {
717 /* If the device is not attached, we've powered it down elsewhere. */
718 child = devlist[i];
719 if (!device_is_attached(child))
720 continue;
721
722 /*
723 * Default to D3 for all sleep states. The _SxD method is optional
724 * so set the powerstate even if it's absent.
725 */
726 pstate = PCI_POWERSTATE_D3;
727 error = acpi_device_pwr_for_sleep(device_get_parent(child),
728 child, &pstate);
729 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
730 pci_set_powerstate(child, pstate);
731 }
732 free(devlist, M_TEMP);
733 error = 0;
734
735 return (error);
736 }
737
738 static int
739 acpi_resume(device_t dev)
740 {
741 ACPI_HANDLE handle;
742 int i, numdevs, error;
743 device_t child, *devlist;
744
745 GIANT_REQUIRED;
746
747 /*
748 * Put all devices in D0 before resuming them. Call _S0D on each one
749 * since some systems expect this.
750 */
751 error = device_get_children(dev, &devlist, &numdevs);
752 if (error)
753 return (error);
754 for (i = 0; i < numdevs; i++) {
755 child = devlist[i];
756 handle = acpi_get_handle(child);
757 if (handle)
758 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
759 if (device_is_attached(child) && acpi_do_powerstate)
760 pci_set_powerstate(child, PCI_POWERSTATE_D0);
761 }
762 free(devlist, M_TEMP);
763
764 return (bus_generic_resume(dev));
765 }
766
767 static int
768 acpi_shutdown(device_t dev)
769 {
770
771 GIANT_REQUIRED;
772
773 /* Allow children to shutdown first. */
774 bus_generic_shutdown(dev);
775
776 /*
777 * Enable any GPEs that are able to power-on the system (i.e., RTC).
778 * Also, disable any that are not valid for this state (most).
779 */
780 acpi_wake_prep_walk(ACPI_STATE_S5);
781
782 return (0);
783 }
784
785 /*
786 * Handle a new device being added
787 */
788 static device_t
789 acpi_add_child(device_t bus, u_int order, const char *name, int unit)
790 {
791 struct acpi_device *ad;
792 device_t child;
793
794 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
795 return (NULL);
796
797 resource_list_init(&ad->ad_rl);
798
799 child = device_add_child_ordered(bus, order, name, unit);
800 if (child != NULL)
801 device_set_ivars(child, ad);
802 else
803 free(ad, M_ACPIDEV);
804 return (child);
805 }
806
807 static int
808 acpi_print_child(device_t bus, device_t child)
809 {
810 struct acpi_device *adev = device_get_ivars(child);
811 struct resource_list *rl = &adev->ad_rl;
812 int retval = 0;
813
814 retval += bus_print_child_header(bus, child);
815 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
816 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
817 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
818 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
819 if (device_get_flags(child))
820 retval += printf(" flags %#x", device_get_flags(child));
821 retval += bus_print_child_footer(bus, child);
822
823 return (retval);
824 }
825
826 /*
827 * If this device is an ACPI child but no one claimed it, attempt
828 * to power it off. We'll power it back up when a driver is added.
829 *
830 * XXX Disabled for now since many necessary devices (like fdc and
831 * ATA) don't claim the devices we created for them but still expect
832 * them to be powered up.
833 */
834 static void
835 acpi_probe_nomatch(device_t bus, device_t child)
836 {
837 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
838 pci_set_powerstate(child, PCI_POWERSTATE_D3);
839 #endif
840 }
841
842 /*
843 * If a new driver has a chance to probe a child, first power it up.
844 *
845 * XXX Disabled for now (see acpi_probe_nomatch for details).
846 */
847 static void
848 acpi_driver_added(device_t dev, driver_t *driver)
849 {
850 device_t child, *devlist;
851 int i, numdevs;
852
853 DEVICE_IDENTIFY(driver, dev);
854 if (device_get_children(dev, &devlist, &numdevs))
855 return;
856 for (i = 0; i < numdevs; i++) {
857 child = devlist[i];
858 if (device_get_state(child) == DS_NOTPRESENT) {
859 #ifdef ACPI_ENABLE_POWERDOWN_NODRIVER
860 pci_set_powerstate(child, PCI_POWERSTATE_D0);
861 if (device_probe_and_attach(child) != 0)
862 pci_set_powerstate(child, PCI_POWERSTATE_D3);
863 #else
864 device_probe_and_attach(child);
865 #endif
866 }
867 }
868 free(devlist, M_TEMP);
869 }
870
871 /* Location hint for devctl(8) */
872 static int
873 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
874 size_t buflen)
875 {
876 struct acpi_device *dinfo = device_get_ivars(child);
877
878 if (dinfo->ad_handle)
879 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
880 else
881 snprintf(buf, buflen, "unknown");
882 return (0);
883 }
884
885 /* PnP information for devctl(8) */
886 static int
887 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
888 size_t buflen)
889 {
890 struct acpi_device *dinfo = device_get_ivars(child);
891 ACPI_DEVICE_INFO *adinfo;
892
893 if (ACPI_FAILURE(AcpiGetObjectInfo(dinfo->ad_handle, &adinfo))) {
894 snprintf(buf, buflen, "unknown");
895 return (0);
896 }
897
898 snprintf(buf, buflen, "_HID=%s _UID=%lu",
899 (adinfo->Valid & ACPI_VALID_HID) ?
900 adinfo->HardwareId.String : "none",
901 (adinfo->Valid & ACPI_VALID_UID) ?
902 strtoul(adinfo->UniqueId.String, NULL, 10) : 0UL);
903 AcpiOsFree(adinfo);
904
905 return (0);
906 }
907
908 /*
909 * Handle per-device ivars
910 */
911 static int
912 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
913 {
914 struct acpi_device *ad;
915
916 if ((ad = device_get_ivars(child)) == NULL) {
917 device_printf(child, "device has no ivars\n");
918 return (ENOENT);
919 }
920
921 /* ACPI and ISA compatibility ivars */
922 switch(index) {
923 case ACPI_IVAR_HANDLE:
924 *(ACPI_HANDLE *)result = ad->ad_handle;
925 break;
926 case ACPI_IVAR_MAGIC:
927 *(uintptr_t *)result = ad->ad_magic;
928 break;
929 case ACPI_IVAR_PRIVATE:
930 *(void **)result = ad->ad_private;
931 break;
932 case ACPI_IVAR_FLAGS:
933 *(int *)result = ad->ad_flags;
934 break;
935 case ISA_IVAR_VENDORID:
936 case ISA_IVAR_SERIAL:
937 case ISA_IVAR_COMPATID:
938 *(int *)result = -1;
939 break;
940 case ISA_IVAR_LOGICALID:
941 *(int *)result = acpi_isa_get_logicalid(child);
942 break;
943 default:
944 return (ENOENT);
945 }
946
947 return (0);
948 }
949
950 static int
951 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
952 {
953 struct acpi_device *ad;
954
955 if ((ad = device_get_ivars(child)) == NULL) {
956 device_printf(child, "device has no ivars\n");
957 return (ENOENT);
958 }
959
960 switch(index) {
961 case ACPI_IVAR_HANDLE:
962 ad->ad_handle = (ACPI_HANDLE)value;
963 break;
964 case ACPI_IVAR_MAGIC:
965 ad->ad_magic = (uintptr_t)value;
966 break;
967 case ACPI_IVAR_PRIVATE:
968 ad->ad_private = (void *)value;
969 break;
970 case ACPI_IVAR_FLAGS:
971 ad->ad_flags = (int)value;
972 break;
973 default:
974 panic("bad ivar write request (%d)", index);
975 return (ENOENT);
976 }
977
978 return (0);
979 }
980
981 /*
982 * Handle child resource allocation/removal
983 */
984 static struct resource_list *
985 acpi_get_rlist(device_t dev, device_t child)
986 {
987 struct acpi_device *ad;
988
989 ad = device_get_ivars(child);
990 return (&ad->ad_rl);
991 }
992
993 static int
994 acpi_match_resource_hint(device_t dev, int type, long value)
995 {
996 struct acpi_device *ad = device_get_ivars(dev);
997 struct resource_list *rl = &ad->ad_rl;
998 struct resource_list_entry *rle;
999
1000 STAILQ_FOREACH(rle, rl, link) {
1001 if (rle->type != type)
1002 continue;
1003 if (rle->start <= value && rle->end >= value)
1004 return (1);
1005 }
1006 return (0);
1007 }
1008
1009 /*
1010 * Wire device unit numbers based on resource matches in hints.
1011 */
1012 static void
1013 acpi_hint_device_unit(device_t acdev, device_t child, const char *name,
1014 int *unitp)
1015 {
1016 const char *s;
1017 long value;
1018 int line, matches, unit;
1019
1020 /*
1021 * Iterate over all the hints for the devices with the specified
1022 * name to see if one's resources are a subset of this device.
1023 */
1024 line = 0;
1025 for (;;) {
1026 if (resource_find_dev(&line, name, &unit, "at", NULL) != 0)
1027 break;
1028
1029 /* Must have an "at" for acpi or isa. */
1030 resource_string_value(name, unit, "at", &s);
1031 if (!(strcmp(s, "acpi0") == 0 || strcmp(s, "acpi") == 0 ||
1032 strcmp(s, "isa0") == 0 || strcmp(s, "isa") == 0))
1033 continue;
1034
1035 /*
1036 * Check for matching resources. We must have at least one match.
1037 * Since I/O and memory resources cannot be shared, if we get a
1038 * match on either of those, ignore any mismatches in IRQs or DRQs.
1039 *
1040 * XXX: We may want to revisit this to be more lenient and wire
1041 * as long as it gets one match.
1042 */
1043 matches = 0;
1044 if (resource_long_value(name, unit, "port", &value) == 0) {
1045 /*
1046 * Floppy drive controllers are notorious for having a
1047 * wide variety of resources not all of which include the
1048 * first port that is specified by the hint (typically
1049 * 0x3f0) (see the comment above fdc_isa_alloc_resources()
1050 * in fdc_isa.c). However, they do all seem to include
1051 * port + 2 (e.g. 0x3f2) so for a floppy device, look for
1052 * 'value + 2' in the port resources instead of the hint
1053 * value.
1054 */
1055 if (strcmp(name, "fdc") == 0)
1056 value += 2;
1057 if (acpi_match_resource_hint(child, SYS_RES_IOPORT, value))
1058 matches++;
1059 else
1060 continue;
1061 }
1062 if (resource_long_value(name, unit, "maddr", &value) == 0) {
1063 if (acpi_match_resource_hint(child, SYS_RES_MEMORY, value))
1064 matches++;
1065 else
1066 continue;
1067 }
1068 if (matches > 0)
1069 goto matched;
1070 if (resource_long_value(name, unit, "irq", &value) == 0) {
1071 if (acpi_match_resource_hint(child, SYS_RES_IRQ, value))
1072 matches++;
1073 else
1074 continue;
1075 }
1076 if (resource_long_value(name, unit, "drq", &value) == 0) {
1077 if (acpi_match_resource_hint(child, SYS_RES_DRQ, value))
1078 matches++;
1079 else
1080 continue;
1081 }
1082
1083 matched:
1084 if (matches > 0) {
1085 /* We have a winner! */
1086 *unitp = unit;
1087 break;
1088 }
1089 }
1090 }
1091
1092 /*
1093 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
1094 * duplicates, we merge any in the sysresource attach routine.
1095 */
1096 static int
1097 acpi_sysres_alloc(device_t dev)
1098 {
1099 struct resource *res;
1100 struct resource_list *rl;
1101 struct resource_list_entry *rle;
1102 struct rman *rm;
1103 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
1104 device_t *children;
1105 int child_count, i;
1106
1107 /*
1108 * Probe/attach any sysresource devices. This would be unnecessary if we
1109 * had multi-pass probe/attach.
1110 */
1111 if (device_get_children(dev, &children, &child_count) != 0)
1112 return (ENXIO);
1113 for (i = 0; i < child_count; i++) {
1114 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
1115 device_probe_and_attach(children[i]);
1116 }
1117 free(children, M_TEMP);
1118
1119 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
1120 STAILQ_FOREACH(rle, rl, link) {
1121 if (rle->res != NULL) {
1122 device_printf(dev, "duplicate resource for %lx\n", rle->start);
1123 continue;
1124 }
1125
1126 /* Only memory and IO resources are valid here. */
1127 switch (rle->type) {
1128 case SYS_RES_IOPORT:
1129 rm = &acpi_rman_io;
1130 break;
1131 case SYS_RES_MEMORY:
1132 rm = &acpi_rman_mem;
1133 break;
1134 default:
1135 continue;
1136 }
1137
1138 /* Pre-allocate resource and add to our rman pool. */
1139 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
1140 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
1141 if (res != NULL) {
1142 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
1143 rle->res = res;
1144 } else
1145 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
1146 rle->start, rle->count, rle->type);
1147 }
1148 return (0);
1149 }
1150
1151 static struct resource *
1152 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
1153 u_long start, u_long end, u_long count, u_int flags)
1154 {
1155 ACPI_RESOURCE ares;
1156 struct acpi_device *ad = device_get_ivars(child);
1157 struct resource_list *rl = &ad->ad_rl;
1158 struct resource_list_entry *rle;
1159 struct resource *res;
1160 struct rman *rm;
1161
1162 res = NULL;
1163
1164 /* We only handle memory and IO resources through rman. */
1165 switch (type) {
1166 case SYS_RES_IOPORT:
1167 rm = &acpi_rman_io;
1168 break;
1169 case SYS_RES_MEMORY:
1170 rm = &acpi_rman_mem;
1171 break;
1172 default:
1173 rm = NULL;
1174 }
1175
1176 ACPI_SERIAL_BEGIN(acpi);
1177
1178 /*
1179 * If this is an allocation of the "default" range for a given RID, and
1180 * we know what the resources for this device are (i.e., they're on the
1181 * child's resource list), use those start/end values.
1182 */
1183 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1184 rle = resource_list_find(rl, type, *rid);
1185 if (rle == NULL)
1186 goto out;
1187 start = rle->start;
1188 end = rle->end;
1189 count = rle->count;
1190 }
1191
1192 /*
1193 * If this is an allocation of a specific range, see if we can satisfy
1194 * the request from our system resource regions. If we can't, pass the
1195 * request up to the parent.
1196 */
1197 if (start + count - 1 == end && rm != NULL)
1198 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1199 child);
1200 if (res == NULL) {
1201 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1202 start, end, count, flags);
1203 } else {
1204 rman_set_rid(res, *rid);
1205
1206 /* If requested, activate the resource using the parent's method. */
1207 if (flags & RF_ACTIVE)
1208 if (bus_activate_resource(child, type, *rid, res) != 0) {
1209 rman_release_resource(res);
1210 res = NULL;
1211 goto out;
1212 }
1213 }
1214
1215 if (res != NULL && device_get_parent(child) == bus)
1216 switch (type) {
1217 case SYS_RES_IRQ:
1218 /*
1219 * Since bus_config_intr() takes immediate effect, we cannot
1220 * configure the interrupt associated with a device when we
1221 * parse the resources but have to defer it until a driver
1222 * actually allocates the interrupt via bus_alloc_resource().
1223 *
1224 * XXX: Should we handle the lookup failing?
1225 */
1226 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1227 acpi_config_intr(child, &ares);
1228 break;
1229 }
1230
1231 out:
1232 ACPI_SERIAL_END(acpi);
1233 return (res);
1234 }
1235
1236 static int
1237 acpi_is_resource_managed(int type, struct resource *r)
1238 {
1239
1240 /* We only handle memory and IO resources through rman. */
1241 switch (type) {
1242 case SYS_RES_IOPORT:
1243 return (rman_is_region_manager(r, &acpi_rman_io));
1244 case SYS_RES_MEMORY:
1245 return (rman_is_region_manager(r, &acpi_rman_mem));
1246 }
1247 return (0);
1248 }
1249
1250 static int
1251 acpi_adjust_resource(device_t bus, device_t child, int type, struct resource *r,
1252 u_long start, u_long end)
1253 {
1254
1255 if (acpi_is_resource_managed(type, r))
1256 return (rman_adjust_resource(r, start, end));
1257 return (bus_generic_adjust_resource(bus, child, type, r, start, end));
1258 }
1259
1260 static int
1261 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1262 struct resource *r)
1263 {
1264 int ret;
1265
1266 ACPI_SERIAL_BEGIN(acpi);
1267
1268 /*
1269 * If this resource belongs to one of our internal managers,
1270 * deactivate it and release it to the local pool. If it doesn't,
1271 * pass this request up to the parent.
1272 */
1273 if (acpi_is_resource_managed(type, r)) {
1274 if (rman_get_flags(r) & RF_ACTIVE) {
1275 ret = bus_deactivate_resource(child, type, rid, r);
1276 if (ret != 0)
1277 goto out;
1278 }
1279 ret = rman_release_resource(r);
1280 } else
1281 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1282
1283 out:
1284 ACPI_SERIAL_END(acpi);
1285 return (ret);
1286 }
1287
1288 static void
1289 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1290 {
1291 struct resource_list *rl;
1292
1293 rl = acpi_get_rlist(bus, child);
1294 resource_list_delete(rl, type, rid);
1295 }
1296
1297 /* Allocate an IO port or memory resource, given its GAS. */
1298 int
1299 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1300 struct resource **res, u_int flags)
1301 {
1302 int error, res_type;
1303
1304 error = ENOMEM;
1305 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1306 return (EINVAL);
1307
1308 /* We only support memory and IO spaces. */
1309 switch (gas->SpaceId) {
1310 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1311 res_type = SYS_RES_MEMORY;
1312 break;
1313 case ACPI_ADR_SPACE_SYSTEM_IO:
1314 res_type = SYS_RES_IOPORT;
1315 break;
1316 default:
1317 return (EOPNOTSUPP);
1318 }
1319
1320 /*
1321 * If the register width is less than 8, assume the BIOS author means
1322 * it is a bit field and just allocate a byte.
1323 */
1324 if (gas->BitWidth && gas->BitWidth < 8)
1325 gas->BitWidth = 8;
1326
1327 /* Validate the address after we're sure we support the space. */
1328 if (gas->Address == 0 || gas->BitWidth == 0)
1329 return (EINVAL);
1330
1331 bus_set_resource(dev, res_type, *rid, gas->Address,
1332 gas->BitWidth / 8);
1333 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE | flags);
1334 if (*res != NULL) {
1335 *type = res_type;
1336 error = 0;
1337 } else
1338 bus_delete_resource(dev, res_type, *rid);
1339
1340 return (error);
1341 }
1342
1343 /* Probe _HID and _CID for compatible ISA PNP ids. */
1344 static uint32_t
1345 acpi_isa_get_logicalid(device_t dev)
1346 {
1347 ACPI_DEVICE_INFO *devinfo;
1348 ACPI_HANDLE h;
1349 uint32_t pnpid;
1350
1351 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1352
1353 /* Fetch and validate the HID. */
1354 if ((h = acpi_get_handle(dev)) == NULL ||
1355 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1356 return_VALUE (0);
1357
1358 pnpid = (devinfo->Valid & ACPI_VALID_HID) != 0 &&
1359 devinfo->HardwareId.Length >= ACPI_EISAID_STRING_SIZE ?
1360 PNP_EISAID(devinfo->HardwareId.String) : 0;
1361 AcpiOsFree(devinfo);
1362
1363 return_VALUE (pnpid);
1364 }
1365
1366 static int
1367 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1368 {
1369 ACPI_DEVICE_INFO *devinfo;
1370 ACPI_DEVICE_ID *ids;
1371 ACPI_HANDLE h;
1372 uint32_t *pnpid;
1373 int i, valid;
1374
1375 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1376
1377 pnpid = cids;
1378
1379 /* Fetch and validate the CID */
1380 if ((h = acpi_get_handle(dev)) == NULL ||
1381 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1382 return_VALUE (0);
1383
1384 if ((devinfo->Valid & ACPI_VALID_CID) == 0) {
1385 AcpiOsFree(devinfo);
1386 return_VALUE (0);
1387 }
1388
1389 if (devinfo->CompatibleIdList.Count < count)
1390 count = devinfo->CompatibleIdList.Count;
1391 ids = devinfo->CompatibleIdList.Ids;
1392 for (i = 0, valid = 0; i < count; i++)
1393 if (ids[i].Length >= ACPI_EISAID_STRING_SIZE &&
1394 strncmp(ids[i].String, "PNP", 3) == 0) {
1395 *pnpid++ = PNP_EISAID(ids[i].String);
1396 valid++;
1397 }
1398 AcpiOsFree(devinfo);
1399
1400 return_VALUE (valid);
1401 }
1402
1403 static char *
1404 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1405 {
1406 ACPI_HANDLE h;
1407 ACPI_OBJECT_TYPE t;
1408 int i;
1409
1410 h = acpi_get_handle(dev);
1411 if (ids == NULL || h == NULL)
1412 return (NULL);
1413 t = acpi_get_type(dev);
1414 if (t != ACPI_TYPE_DEVICE && t != ACPI_TYPE_PROCESSOR)
1415 return (NULL);
1416
1417 /* Try to match one of the array of IDs with a HID or CID. */
1418 for (i = 0; ids[i] != NULL; i++) {
1419 if (acpi_MatchHid(h, ids[i]))
1420 return (ids[i]);
1421 }
1422 return (NULL);
1423 }
1424
1425 static ACPI_STATUS
1426 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1427 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1428 {
1429 ACPI_HANDLE h;
1430
1431 if (dev == NULL)
1432 h = ACPI_ROOT_OBJECT;
1433 else if ((h = acpi_get_handle(dev)) == NULL)
1434 return (AE_BAD_PARAMETER);
1435 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1436 }
1437
1438 static int
1439 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1440 {
1441 struct acpi_softc *sc;
1442 ACPI_HANDLE handle;
1443 ACPI_STATUS status;
1444 char sxd[8];
1445 int error;
1446
1447 sc = device_get_softc(bus);
1448 handle = acpi_get_handle(dev);
1449
1450 /*
1451 * XXX If we find these devices, don't try to power them down.
1452 * The serial and IRDA ports on my T23 hang the system when
1453 * set to D3 and it appears that such legacy devices may
1454 * need special handling in their drivers.
1455 */
1456 if (handle == NULL ||
1457 acpi_MatchHid(handle, "PNP0500") ||
1458 acpi_MatchHid(handle, "PNP0501") ||
1459 acpi_MatchHid(handle, "PNP0502") ||
1460 acpi_MatchHid(handle, "PNP0510") ||
1461 acpi_MatchHid(handle, "PNP0511"))
1462 return (ENXIO);
1463
1464 /*
1465 * Override next state with the value from _SxD, if present. If no
1466 * dstate argument was provided, don't fetch the return value.
1467 */
1468 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1469 if (dstate)
1470 status = acpi_GetInteger(handle, sxd, dstate);
1471 else
1472 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1473
1474 switch (status) {
1475 case AE_OK:
1476 error = 0;
1477 break;
1478 case AE_NOT_FOUND:
1479 error = ESRCH;
1480 break;
1481 default:
1482 error = ENXIO;
1483 break;
1484 }
1485
1486 return (error);
1487 }
1488
1489 /* Callback arg for our implementation of walking the namespace. */
1490 struct acpi_device_scan_ctx {
1491 acpi_scan_cb_t user_fn;
1492 void *arg;
1493 ACPI_HANDLE parent;
1494 };
1495
1496 static ACPI_STATUS
1497 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1498 {
1499 struct acpi_device_scan_ctx *ctx;
1500 device_t dev, old_dev;
1501 ACPI_STATUS status;
1502 ACPI_OBJECT_TYPE type;
1503
1504 /*
1505 * Skip this device if we think we'll have trouble with it or it is
1506 * the parent where the scan began.
1507 */
1508 ctx = (struct acpi_device_scan_ctx *)arg;
1509 if (acpi_avoid(h) || h == ctx->parent)
1510 return (AE_OK);
1511
1512 /* If this is not a valid device type (e.g., a method), skip it. */
1513 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1514 return (AE_OK);
1515 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1516 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1517 return (AE_OK);
1518
1519 /*
1520 * Call the user function with the current device. If it is unchanged
1521 * afterwards, return. Otherwise, we update the handle to the new dev.
1522 */
1523 old_dev = acpi_get_device(h);
1524 dev = old_dev;
1525 status = ctx->user_fn(h, &dev, level, ctx->arg);
1526 if (ACPI_FAILURE(status) || old_dev == dev)
1527 return (status);
1528
1529 /* Remove the old child and its connection to the handle. */
1530 if (old_dev != NULL) {
1531 device_delete_child(device_get_parent(old_dev), old_dev);
1532 AcpiDetachData(h, acpi_fake_objhandler);
1533 }
1534
1535 /* Recreate the handle association if the user created a device. */
1536 if (dev != NULL)
1537 AcpiAttachData(h, acpi_fake_objhandler, dev);
1538
1539 return (AE_OK);
1540 }
1541
1542 static ACPI_STATUS
1543 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1544 acpi_scan_cb_t user_fn, void *arg)
1545 {
1546 ACPI_HANDLE h;
1547 struct acpi_device_scan_ctx ctx;
1548
1549 if (acpi_disabled("children"))
1550 return (AE_OK);
1551
1552 if (dev == NULL)
1553 h = ACPI_ROOT_OBJECT;
1554 else if ((h = acpi_get_handle(dev)) == NULL)
1555 return (AE_BAD_PARAMETER);
1556 ctx.user_fn = user_fn;
1557 ctx.arg = arg;
1558 ctx.parent = h;
1559 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1560 acpi_device_scan_cb, NULL, &ctx, NULL));
1561 }
1562
1563 /*
1564 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1565 * device power states since it's close enough to ACPI.
1566 */
1567 static int
1568 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1569 {
1570 ACPI_HANDLE h;
1571 ACPI_STATUS status;
1572 int error;
1573
1574 error = 0;
1575 h = acpi_get_handle(child);
1576 if (state < ACPI_STATE_D0 || state > ACPI_D_STATES_MAX)
1577 return (EINVAL);
1578 if (h == NULL)
1579 return (0);
1580
1581 /* Ignore errors if the power methods aren't present. */
1582 status = acpi_pwr_switch_consumer(h, state);
1583 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1584 && status != AE_BAD_PARAMETER)
1585 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1586 state, acpi_name(h), AcpiFormatException(status));
1587
1588 return (error);
1589 }
1590
1591 static int
1592 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1593 {
1594 int result, cid_count, i;
1595 uint32_t lid, cids[8];
1596
1597 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1598
1599 /*
1600 * ISA-style drivers attached to ACPI may persist and
1601 * probe manually if we return ENOENT. We never want
1602 * that to happen, so don't ever return it.
1603 */
1604 result = ENXIO;
1605
1606 /* Scan the supplied IDs for a match */
1607 lid = acpi_isa_get_logicalid(child);
1608 cid_count = acpi_isa_get_compatid(child, cids, 8);
1609 while (ids && ids->ip_id) {
1610 if (lid == ids->ip_id) {
1611 result = 0;
1612 goto out;
1613 }
1614 for (i = 0; i < cid_count; i++) {
1615 if (cids[i] == ids->ip_id) {
1616 result = 0;
1617 goto out;
1618 }
1619 }
1620 ids++;
1621 }
1622
1623 out:
1624 if (result == 0 && ids->ip_desc)
1625 device_set_desc(child, ids->ip_desc);
1626
1627 return_VALUE (result);
1628 }
1629
1630 #if defined(__i386__) || defined(__amd64__)
1631 /*
1632 * Look for a MCFG table. If it is present, use the settings for
1633 * domain (segment) 0 to setup PCI config space access via the memory
1634 * map.
1635 */
1636 static void
1637 acpi_enable_pcie(void)
1638 {
1639 ACPI_TABLE_HEADER *hdr;
1640 ACPI_MCFG_ALLOCATION *alloc, *end;
1641 ACPI_STATUS status;
1642
1643 status = AcpiGetTable(ACPI_SIG_MCFG, 1, &hdr);
1644 if (ACPI_FAILURE(status))
1645 return;
1646
1647 end = (ACPI_MCFG_ALLOCATION *)((char *)hdr + hdr->Length);
1648 alloc = (ACPI_MCFG_ALLOCATION *)((ACPI_TABLE_MCFG *)hdr + 1);
1649 while (alloc < end) {
1650 if (alloc->PciSegment == 0) {
1651 pcie_cfgregopen(alloc->Address, alloc->StartBusNumber,
1652 alloc->EndBusNumber);
1653 return;
1654 }
1655 alloc++;
1656 }
1657 }
1658 #endif
1659
1660 /*
1661 * Scan all of the ACPI namespace and attach child devices.
1662 *
1663 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1664 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1665 * However, in violation of the spec, some systems place their PCI link
1666 * devices in \, so we have to walk the whole namespace. We check the
1667 * type of namespace nodes, so this should be ok.
1668 */
1669 static void
1670 acpi_probe_children(device_t bus)
1671 {
1672
1673 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1674
1675 /*
1676 * Scan the namespace and insert placeholders for all the devices that
1677 * we find. We also probe/attach any early devices.
1678 *
1679 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1680 * we want to create nodes for all devices, not just those that are
1681 * currently present. (This assumes that we don't want to create/remove
1682 * devices as they appear, which might be smarter.)
1683 */
1684 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1685 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1686 NULL, bus, NULL);
1687
1688 /* Pre-allocate resources for our rman from any sysresource devices. */
1689 acpi_sysres_alloc(bus);
1690
1691 /* Create any static children by calling device identify methods. */
1692 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1693 bus_generic_probe(bus);
1694
1695 /* Probe/attach all children, created staticly and from the namespace. */
1696 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "acpi bus_generic_attach\n"));
1697 bus_generic_attach(bus);
1698
1699 /* Attach wake sysctls. */
1700 acpi_wake_sysctl_walk(bus);
1701
1702 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1703 return_VOID;
1704 }
1705
1706 /*
1707 * Determine the probe order for a given device.
1708 */
1709 static void
1710 acpi_probe_order(ACPI_HANDLE handle, int *order)
1711 {
1712 ACPI_OBJECT_TYPE type;
1713
1714 /*
1715 * 1. CPUs
1716 * 2. I/O port and memory system resource holders
1717 * 3. Embedded controllers (to handle early accesses)
1718 * 4. PCI Link Devices
1719 */
1720 AcpiGetType(handle, &type);
1721 if (type == ACPI_TYPE_PROCESSOR)
1722 *order = 1;
1723 else if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1724 *order = 2;
1725 else if (acpi_MatchHid(handle, "PNP0C09"))
1726 *order = 3;
1727 else if (acpi_MatchHid(handle, "PNP0C0F"))
1728 *order = 4;
1729 }
1730
1731 /*
1732 * Evaluate a child device and determine whether we might attach a device to
1733 * it.
1734 */
1735 static ACPI_STATUS
1736 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1737 {
1738 ACPI_OBJECT_TYPE type;
1739 ACPI_HANDLE h;
1740 device_t bus, child;
1741 char *handle_str;
1742 int order;
1743
1744 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1745
1746 if (acpi_disabled("children"))
1747 return_ACPI_STATUS (AE_OK);
1748
1749 /* Skip this device if we think we'll have trouble with it. */
1750 if (acpi_avoid(handle))
1751 return_ACPI_STATUS (AE_OK);
1752
1753 bus = (device_t)context;
1754 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1755 handle_str = acpi_name(handle);
1756 switch (type) {
1757 case ACPI_TYPE_DEVICE:
1758 /*
1759 * Since we scan from \, be sure to skip system scope objects.
1760 * \_SB_ and \_TZ_ are defined in ACPICA as devices to work around
1761 * BIOS bugs. For example, \_SB_ is to allow \_SB_._INI to be run
1762 * during the intialization and \_TZ_ is to support Notify() on it.
1763 */
1764 if (strcmp(handle_str, "\\_SB_") == 0 ||
1765 strcmp(handle_str, "\\_TZ_") == 0)
1766 break;
1767 /* FALLTHROUGH */
1768 case ACPI_TYPE_PROCESSOR:
1769 case ACPI_TYPE_THERMAL:
1770 case ACPI_TYPE_POWER:
1771 /*
1772 * Create a placeholder device for this node. Sort the
1773 * placeholder so that the probe/attach passes will run
1774 * breadth-first. Orders less than ACPI_DEV_BASE_ORDER
1775 * are reserved for special objects (i.e., system
1776 * resources).
1777 */
1778 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1779 order = level * 10 + 100;
1780 acpi_probe_order(handle, &order);
1781 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1782 if (child == NULL)
1783 break;
1784
1785 /* Associate the handle with the device_t and vice versa. */
1786 acpi_set_handle(child, handle);
1787 AcpiAttachData(handle, acpi_fake_objhandler, child);
1788
1789 /*
1790 * Check that the device is present. If it's not present,
1791 * leave it disabled (so that we have a device_t attached to
1792 * the handle, but we don't probe it).
1793 *
1794 * XXX PCI link devices sometimes report "present" but not
1795 * "functional" (i.e. if disabled). Go ahead and probe them
1796 * anyway since we may enable them later.
1797 */
1798 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1799 /* Never disable PCI link devices. */
1800 if (acpi_MatchHid(handle, "PNP0C0F"))
1801 break;
1802 /*
1803 * Docking stations should remain enabled since the system
1804 * may be undocked at boot.
1805 */
1806 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1807 break;
1808
1809 device_disable(child);
1810 break;
1811 }
1812
1813 /*
1814 * Get the device's resource settings and attach them.
1815 * Note that if the device has _PRS but no _CRS, we need
1816 * to decide when it's appropriate to try to configure the
1817 * device. Ignore the return value here; it's OK for the
1818 * device not to have any resources.
1819 */
1820 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1821 break;
1822 }
1823 }
1824
1825 return_ACPI_STATUS (AE_OK);
1826 }
1827
1828 /*
1829 * AcpiAttachData() requires an object handler but never uses it. This is a
1830 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1831 */
1832 void
1833 acpi_fake_objhandler(ACPI_HANDLE h, void *data)
1834 {
1835 }
1836
1837 static void
1838 acpi_shutdown_final(void *arg, int howto)
1839 {
1840 struct acpi_softc *sc = (struct acpi_softc *)arg;
1841 ACPI_STATUS status;
1842
1843 /*
1844 * XXX Shutdown code should only run on the BSP (cpuid 0).
1845 * Some chipsets do not power off the system correctly if called from
1846 * an AP.
1847 */
1848 if ((howto & RB_POWEROFF) != 0) {
1849 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1850 if (ACPI_FAILURE(status)) {
1851 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
1852 AcpiFormatException(status));
1853 return;
1854 }
1855 device_printf(sc->acpi_dev, "Powering system off\n");
1856 ACPI_DISABLE_IRQS();
1857 status = AcpiEnterSleepState(ACPI_STATE_S5);
1858 if (ACPI_FAILURE(status))
1859 device_printf(sc->acpi_dev, "power-off failed - %s\n",
1860 AcpiFormatException(status));
1861 else {
1862 DELAY(1000000);
1863 device_printf(sc->acpi_dev, "power-off failed - timeout\n");
1864 }
1865 } else if ((howto & RB_HALT) == 0 && sc->acpi_handle_reboot) {
1866 /* Reboot using the reset register. */
1867 status = AcpiReset();
1868 if (ACPI_SUCCESS(status)) {
1869 DELAY(1000000);
1870 device_printf(sc->acpi_dev, "reset failed - timeout\n");
1871 } else if (status != AE_NOT_EXIST)
1872 device_printf(sc->acpi_dev, "reset failed - %s\n",
1873 AcpiFormatException(status));
1874 } else if (sc->acpi_do_disable && panicstr == NULL) {
1875 /*
1876 * Only disable ACPI if the user requested. On some systems, writing
1877 * the disable value to SMI_CMD hangs the system.
1878 */
1879 device_printf(sc->acpi_dev, "Shutting down\n");
1880 AcpiTerminate();
1881 }
1882 }
1883
1884 static void
1885 acpi_enable_fixed_events(struct acpi_softc *sc)
1886 {
1887 static int first_time = 1;
1888
1889 /* Enable and clear fixed events and install handlers. */
1890 if ((AcpiGbl_FADT.Flags & ACPI_FADT_POWER_BUTTON) == 0) {
1891 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1892 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1893 acpi_event_power_button_sleep, sc);
1894 if (first_time)
1895 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1896 }
1897 if ((AcpiGbl_FADT.Flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
1898 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1899 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1900 acpi_event_sleep_button_sleep, sc);
1901 if (first_time)
1902 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1903 }
1904
1905 first_time = 0;
1906 }
1907
1908 /*
1909 * Returns true if the device is actually present and should
1910 * be attached to. This requires the present, enabled, UI-visible
1911 * and diagnostics-passed bits to be set.
1912 */
1913 BOOLEAN
1914 acpi_DeviceIsPresent(device_t dev)
1915 {
1916 ACPI_DEVICE_INFO *devinfo;
1917 ACPI_HANDLE h;
1918 BOOLEAN present;
1919
1920 if ((h = acpi_get_handle(dev)) == NULL ||
1921 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1922 return (FALSE);
1923
1924 /* If no _STA method, must be present */
1925 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
1926 ACPI_DEVICE_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
1927
1928 AcpiOsFree(devinfo);
1929 return (present);
1930 }
1931
1932 /*
1933 * Returns true if the battery is actually present and inserted.
1934 */
1935 BOOLEAN
1936 acpi_BatteryIsPresent(device_t dev)
1937 {
1938 ACPI_DEVICE_INFO *devinfo;
1939 ACPI_HANDLE h;
1940 BOOLEAN present;
1941
1942 if ((h = acpi_get_handle(dev)) == NULL ||
1943 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1944 return (FALSE);
1945
1946 /* If no _STA method, must be present */
1947 present = (devinfo->Valid & ACPI_VALID_STA) == 0 ||
1948 ACPI_BATTERY_PRESENT(devinfo->CurrentStatus) ? TRUE : FALSE;
1949
1950 AcpiOsFree(devinfo);
1951 return (present);
1952 }
1953
1954 /*
1955 * Match a HID string against a handle
1956 */
1957 BOOLEAN
1958 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1959 {
1960 ACPI_DEVICE_INFO *devinfo;
1961 BOOLEAN ret;
1962 int i;
1963
1964 if (hid == NULL || h == NULL ||
1965 ACPI_FAILURE(AcpiGetObjectInfo(h, &devinfo)))
1966 return (FALSE);
1967
1968 ret = FALSE;
1969 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1970 strcmp(hid, devinfo->HardwareId.String) == 0)
1971 ret = TRUE;
1972 else if ((devinfo->Valid & ACPI_VALID_CID) != 0)
1973 for (i = 0; i < devinfo->CompatibleIdList.Count; i++) {
1974 if (strcmp(hid, devinfo->CompatibleIdList.Ids[i].String) == 0) {
1975 ret = TRUE;
1976 break;
1977 }
1978 }
1979
1980 AcpiOsFree(devinfo);
1981 return (ret);
1982 }
1983
1984 /*
1985 * Return the handle of a named object within our scope, ie. that of (parent)
1986 * or one if its parents.
1987 */
1988 ACPI_STATUS
1989 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1990 {
1991 ACPI_HANDLE r;
1992 ACPI_STATUS status;
1993
1994 /* Walk back up the tree to the root */
1995 for (;;) {
1996 status = AcpiGetHandle(parent, path, &r);
1997 if (ACPI_SUCCESS(status)) {
1998 *result = r;
1999 return (AE_OK);
2000 }
2001 /* XXX Return error here? */
2002 if (status != AE_NOT_FOUND)
2003 return (AE_OK);
2004 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
2005 return (AE_NOT_FOUND);
2006 parent = r;
2007 }
2008 }
2009
2010 /* Find the difference between two PM tick counts. */
2011 uint32_t
2012 acpi_TimerDelta(uint32_t end, uint32_t start)
2013 {
2014 uint32_t delta;
2015
2016 if (end >= start)
2017 delta = end - start;
2018 else if (AcpiGbl_FADT.Flags & ACPI_FADT_32BIT_TIMER)
2019 delta = ((0xFFFFFFFF - start) + end + 1);
2020 else
2021 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
2022 return (delta);
2023 }
2024
2025 /*
2026 * Allocate a buffer with a preset data size.
2027 */
2028 ACPI_BUFFER *
2029 acpi_AllocBuffer(int size)
2030 {
2031 ACPI_BUFFER *buf;
2032
2033 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
2034 return (NULL);
2035 buf->Length = size;
2036 buf->Pointer = (void *)(buf + 1);
2037 return (buf);
2038 }
2039
2040 ACPI_STATUS
2041 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
2042 {
2043 ACPI_OBJECT arg1;
2044 ACPI_OBJECT_LIST args;
2045
2046 arg1.Type = ACPI_TYPE_INTEGER;
2047 arg1.Integer.Value = number;
2048 args.Count = 1;
2049 args.Pointer = &arg1;
2050
2051 return (AcpiEvaluateObject(handle, path, &args, NULL));
2052 }
2053
2054 /*
2055 * Evaluate a path that should return an integer.
2056 */
2057 ACPI_STATUS
2058 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
2059 {
2060 ACPI_STATUS status;
2061 ACPI_BUFFER buf;
2062 ACPI_OBJECT param;
2063
2064 if (handle == NULL)
2065 handle = ACPI_ROOT_OBJECT;
2066
2067 /*
2068 * Assume that what we've been pointed at is an Integer object, or
2069 * a method that will return an Integer.
2070 */
2071 buf.Pointer = ¶m;
2072 buf.Length = sizeof(param);
2073 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2074 if (ACPI_SUCCESS(status)) {
2075 if (param.Type == ACPI_TYPE_INTEGER)
2076 *number = param.Integer.Value;
2077 else
2078 status = AE_TYPE;
2079 }
2080
2081 /*
2082 * In some applications, a method that's expected to return an Integer
2083 * may instead return a Buffer (probably to simplify some internal
2084 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
2085 * convert it into an Integer as best we can.
2086 *
2087 * This is a hack.
2088 */
2089 if (status == AE_BUFFER_OVERFLOW) {
2090 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
2091 status = AE_NO_MEMORY;
2092 } else {
2093 status = AcpiEvaluateObject(handle, path, NULL, &buf);
2094 if (ACPI_SUCCESS(status))
2095 status = acpi_ConvertBufferToInteger(&buf, number);
2096 AcpiOsFree(buf.Pointer);
2097 }
2098 }
2099 return (status);
2100 }
2101
2102 ACPI_STATUS
2103 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
2104 {
2105 ACPI_OBJECT *p;
2106 UINT8 *val;
2107 int i;
2108
2109 p = (ACPI_OBJECT *)bufp->Pointer;
2110 if (p->Type == ACPI_TYPE_INTEGER) {
2111 *number = p->Integer.Value;
2112 return (AE_OK);
2113 }
2114 if (p->Type != ACPI_TYPE_BUFFER)
2115 return (AE_TYPE);
2116 if (p->Buffer.Length > sizeof(int))
2117 return (AE_BAD_DATA);
2118
2119 *number = 0;
2120 val = p->Buffer.Pointer;
2121 for (i = 0; i < p->Buffer.Length; i++)
2122 *number += val[i] << (i * 8);
2123 return (AE_OK);
2124 }
2125
2126 /*
2127 * Iterate over the elements of an a package object, calling the supplied
2128 * function for each element.
2129 *
2130 * XXX possible enhancement might be to abort traversal on error.
2131 */
2132 ACPI_STATUS
2133 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
2134 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
2135 {
2136 ACPI_OBJECT *comp;
2137 int i;
2138
2139 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
2140 return (AE_BAD_PARAMETER);
2141
2142 /* Iterate over components */
2143 i = 0;
2144 comp = pkg->Package.Elements;
2145 for (; i < pkg->Package.Count; i++, comp++)
2146 func(comp, arg);
2147
2148 return (AE_OK);
2149 }
2150
2151 /*
2152 * Find the (index)th resource object in a set.
2153 */
2154 ACPI_STATUS
2155 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
2156 {
2157 ACPI_RESOURCE *rp;
2158 int i;
2159
2160 rp = (ACPI_RESOURCE *)buf->Pointer;
2161 i = index;
2162 while (i-- > 0) {
2163 /* Range check */
2164 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2165 return (AE_BAD_PARAMETER);
2166
2167 /* Check for terminator */
2168 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2169 return (AE_NOT_FOUND);
2170 rp = ACPI_NEXT_RESOURCE(rp);
2171 }
2172 if (resp != NULL)
2173 *resp = rp;
2174
2175 return (AE_OK);
2176 }
2177
2178 /*
2179 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2180 *
2181 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2182 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2183 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2184 * resources.
2185 */
2186 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2187
2188 ACPI_STATUS
2189 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2190 {
2191 ACPI_RESOURCE *rp;
2192 void *newp;
2193
2194 /* Initialise the buffer if necessary. */
2195 if (buf->Pointer == NULL) {
2196 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2197 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2198 return (AE_NO_MEMORY);
2199 rp = (ACPI_RESOURCE *)buf->Pointer;
2200 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2201 rp->Length = 0;
2202 }
2203 if (res == NULL)
2204 return (AE_OK);
2205
2206 /*
2207 * Scan the current buffer looking for the terminator.
2208 * This will either find the terminator or hit the end
2209 * of the buffer and return an error.
2210 */
2211 rp = (ACPI_RESOURCE *)buf->Pointer;
2212 for (;;) {
2213 /* Range check, don't go outside the buffer */
2214 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2215 return (AE_BAD_PARAMETER);
2216 if (rp->Type == ACPI_RESOURCE_TYPE_END_TAG || rp->Length == 0)
2217 break;
2218 rp = ACPI_NEXT_RESOURCE(rp);
2219 }
2220
2221 /*
2222 * Check the size of the buffer and expand if required.
2223 *
2224 * Required size is:
2225 * size of existing resources before terminator +
2226 * size of new resource and header +
2227 * size of terminator.
2228 *
2229 * Note that this loop should really only run once, unless
2230 * for some reason we are stuffing a *really* huge resource.
2231 */
2232 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2233 res->Length + ACPI_RS_SIZE_NO_DATA +
2234 ACPI_RS_SIZE_MIN) >= buf->Length) {
2235 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2236 return (AE_NO_MEMORY);
2237 bcopy(buf->Pointer, newp, buf->Length);
2238 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2239 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2240 AcpiOsFree(buf->Pointer);
2241 buf->Pointer = newp;
2242 buf->Length += buf->Length;
2243 }
2244
2245 /* Insert the new resource. */
2246 bcopy(res, rp, res->Length + ACPI_RS_SIZE_NO_DATA);
2247
2248 /* And add the terminator. */
2249 rp = ACPI_NEXT_RESOURCE(rp);
2250 rp->Type = ACPI_RESOURCE_TYPE_END_TAG;
2251 rp->Length = 0;
2252
2253 return (AE_OK);
2254 }
2255
2256 /*
2257 * Set interrupt model.
2258 */
2259 ACPI_STATUS
2260 acpi_SetIntrModel(int model)
2261 {
2262
2263 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2264 }
2265
2266 /*
2267 * Walk subtables of a table and call a callback routine for each
2268 * subtable. The caller should provide the first subtable and a
2269 * pointer to the end of the table. This can be used to walk tables
2270 * such as MADT and SRAT that use subtable entries.
2271 */
2272 void
2273 acpi_walk_subtables(void *first, void *end, acpi_subtable_handler *handler,
2274 void *arg)
2275 {
2276 ACPI_SUBTABLE_HEADER *entry;
2277
2278 for (entry = first; (void *)entry < end; ) {
2279 /* Avoid an infinite loop if we hit a bogus entry. */
2280 if (entry->Length < sizeof(ACPI_SUBTABLE_HEADER))
2281 return;
2282
2283 handler(entry, arg);
2284 entry = ACPI_ADD_PTR(ACPI_SUBTABLE_HEADER, entry, entry->Length);
2285 }
2286 }
2287
2288 /*
2289 * DEPRECATED. This interface has serious deficiencies and will be
2290 * removed.
2291 *
2292 * Immediately enter the sleep state. In the old model, acpiconf(8) ran
2293 * rc.suspend and rc.resume so we don't have to notify devd(8) to do this.
2294 */
2295 ACPI_STATUS
2296 acpi_SetSleepState(struct acpi_softc *sc, int state)
2297 {
2298 static int once;
2299
2300 if (!once) {
2301 device_printf(sc->acpi_dev,
2302 "warning: acpi_SetSleepState() deprecated, need to update your software\n");
2303 once = 1;
2304 }
2305 return (acpi_EnterSleepState(sc, state));
2306 }
2307
2308 #if defined(__amd64__) || defined(__i386__)
2309 static void
2310 acpi_sleep_force(void *arg)
2311 {
2312 struct acpi_softc *sc = (struct acpi_softc *)arg;
2313
2314 device_printf(sc->acpi_dev,
2315 "suspend request timed out, forcing sleep now\n");
2316 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2317 device_printf(sc->acpi_dev, "force sleep state S%d failed\n",
2318 sc->acpi_next_sstate);
2319 }
2320 #endif
2321
2322 /*
2323 * Request that the system enter the given suspend state. All /dev/apm
2324 * devices and devd(8) will be notified. Userland then has a chance to
2325 * save state and acknowledge the request. The system sleeps once all
2326 * acks are in.
2327 */
2328 int
2329 acpi_ReqSleepState(struct acpi_softc *sc, int state)
2330 {
2331 #if defined(__amd64__) || defined(__i386__)
2332 #if defined(__i386__)
2333 struct apm_clone_data *clone;
2334 #endif
2335 ACPI_STATUS status;
2336
2337 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2338 return (EINVAL);
2339 if (!acpi_sleep_states[state])
2340 return (EOPNOTSUPP);
2341
2342 ACPI_LOCK(acpi);
2343
2344 /* If a suspend request is already in progress, just return. */
2345 if (sc->acpi_next_sstate != 0) {
2346 ACPI_UNLOCK(acpi);
2347 return (0);
2348 }
2349
2350 /* S5 (soft-off) should be entered directly with no waiting. */
2351 if (state == ACPI_STATE_S5) {
2352 ACPI_UNLOCK(acpi);
2353 status = acpi_EnterSleepState(sc, state);
2354 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2355 }
2356
2357 /* Record the pending state and notify all apm devices. */
2358 sc->acpi_next_sstate = state;
2359 #if defined(__i386__)
2360 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2361 clone->notify_status = APM_EV_NONE;
2362 if ((clone->flags & ACPI_EVF_DEVD) == 0) {
2363 selwakeuppri(&clone->sel_read, PZERO);
2364 KNOTE_LOCKED(&clone->sel_read.si_note, 0);
2365 }
2366 }
2367 #endif
2368
2369 /* If devd(8) is not running, immediately enter the sleep state. */
2370 if (!devctl_process_running()) {
2371 ACPI_UNLOCK(acpi);
2372 status = acpi_EnterSleepState(sc, state);
2373 return (ACPI_SUCCESS(status) ? 0 : ENXIO);
2374 }
2375
2376 /*
2377 * Set a timeout to fire if userland doesn't ack the suspend request
2378 * in time. This way we still eventually go to sleep if we were
2379 * overheating or running low on battery, even if userland is hung.
2380 * We cancel this timeout once all userland acks are in or the
2381 * suspend request is aborted.
2382 */
2383 callout_reset(&sc->susp_force_to, 10 * hz, acpi_sleep_force, sc);
2384 ACPI_UNLOCK(acpi);
2385
2386 /* Now notify devd(8) also. */
2387 acpi_UserNotify("Suspend", ACPI_ROOT_OBJECT, state);
2388
2389 return (0);
2390 #else
2391 /* This platform does not support acpi suspend/resume. */
2392 return (EOPNOTSUPP);
2393 #endif
2394 }
2395
2396 /*
2397 * Acknowledge (or reject) a pending sleep state. The caller has
2398 * prepared for suspend and is now ready for it to proceed. If the
2399 * error argument is non-zero, it indicates suspend should be cancelled
2400 * and gives an errno value describing why. Once all votes are in,
2401 * we suspend the system.
2402 */
2403 int
2404 acpi_AckSleepState(struct apm_clone_data *clone, int error)
2405 {
2406 #if defined(__amd64__) || defined(__i386__)
2407 struct acpi_softc *sc;
2408 int ret, sleeping;
2409
2410 /* If no pending sleep state, return an error. */
2411 ACPI_LOCK(acpi);
2412 sc = clone->acpi_sc;
2413 if (sc->acpi_next_sstate == 0) {
2414 ACPI_UNLOCK(acpi);
2415 return (ENXIO);
2416 }
2417
2418 /* Caller wants to abort suspend process. */
2419 if (error) {
2420 sc->acpi_next_sstate = 0;
2421 callout_stop(&sc->susp_force_to);
2422 device_printf(sc->acpi_dev,
2423 "listener on %s cancelled the pending suspend\n",
2424 devtoname(clone->cdev));
2425 ACPI_UNLOCK(acpi);
2426 return (0);
2427 }
2428
2429 /*
2430 * Mark this device as acking the suspend request. Then, walk through
2431 * all devices, seeing if they agree yet. We only count devices that
2432 * are writable since read-only devices couldn't ack the request.
2433 */
2434 sleeping = TRUE;
2435 #if defined(__i386__)
2436 clone->notify_status = APM_EV_ACKED;
2437 STAILQ_FOREACH(clone, &sc->apm_cdevs, entries) {
2438 if ((clone->flags & ACPI_EVF_WRITE) != 0 &&
2439 clone->notify_status != APM_EV_ACKED) {
2440 sleeping = FALSE;
2441 break;
2442 }
2443 }
2444 #endif
2445
2446 /* If all devices have voted "yes", we will suspend now. */
2447 if (sleeping)
2448 callout_stop(&sc->susp_force_to);
2449 ACPI_UNLOCK(acpi);
2450 ret = 0;
2451 if (sleeping) {
2452 if (ACPI_FAILURE(acpi_EnterSleepState(sc, sc->acpi_next_sstate)))
2453 ret = ENODEV;
2454 }
2455 return (ret);
2456 #else
2457 /* This platform does not support acpi suspend/resume. */
2458 return (EOPNOTSUPP);
2459 #endif
2460 }
2461
2462 static void
2463 acpi_sleep_enable(void *arg)
2464 {
2465 struct acpi_softc *sc = (struct acpi_softc *)arg;
2466
2467 /* Reschedule if the system is not fully up and running. */
2468 if (!AcpiGbl_SystemAwakeAndRunning) {
2469 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2470 return;
2471 }
2472
2473 ACPI_LOCK(acpi);
2474 sc->acpi_sleep_disabled = FALSE;
2475 ACPI_UNLOCK(acpi);
2476 }
2477
2478 static ACPI_STATUS
2479 acpi_sleep_disable(struct acpi_softc *sc)
2480 {
2481 ACPI_STATUS status;
2482
2483 /* Fail if the system is not fully up and running. */
2484 if (!AcpiGbl_SystemAwakeAndRunning)
2485 return (AE_ERROR);
2486
2487 ACPI_LOCK(acpi);
2488 status = sc->acpi_sleep_disabled ? AE_ERROR : AE_OK;
2489 sc->acpi_sleep_disabled = TRUE;
2490 ACPI_UNLOCK(acpi);
2491
2492 return (status);
2493 }
2494
2495 enum acpi_sleep_state {
2496 ACPI_SS_NONE,
2497 ACPI_SS_GPE_SET,
2498 ACPI_SS_DEV_SUSPEND,
2499 ACPI_SS_SLP_PREP,
2500 ACPI_SS_SLEPT,
2501 };
2502
2503 /*
2504 * Enter the desired system sleep state.
2505 *
2506 * Currently we support S1-S5 but S4 is only S4BIOS
2507 */
2508 static ACPI_STATUS
2509 acpi_EnterSleepState(struct acpi_softc *sc, int state)
2510 {
2511 ACPI_STATUS status;
2512 enum acpi_sleep_state slp_state;
2513
2514 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2515
2516 if (state < ACPI_STATE_S1 || state > ACPI_S_STATES_MAX)
2517 return_ACPI_STATUS (AE_BAD_PARAMETER);
2518 if (!acpi_sleep_states[state]) {
2519 device_printf(sc->acpi_dev, "Sleep state S%d not supported by BIOS\n",
2520 state);
2521 return (AE_SUPPORT);
2522 }
2523
2524 /* Re-entry once we're suspending is not allowed. */
2525 status = acpi_sleep_disable(sc);
2526 if (ACPI_FAILURE(status)) {
2527 device_printf(sc->acpi_dev,
2528 "suspend request ignored (not ready yet)\n");
2529 return (status);
2530 }
2531
2532 if (state == ACPI_STATE_S5) {
2533 /*
2534 * Shut down cleanly and power off. This will call us back through the
2535 * shutdown handlers.
2536 */
2537 shutdown_nice(RB_POWEROFF);
2538 return_ACPI_STATUS (AE_OK);
2539 }
2540
2541 EVENTHANDLER_INVOKE(power_suspend);
2542
2543 if (smp_started) {
2544 thread_lock(curthread);
2545 sched_bind(curthread, 0);
2546 thread_unlock(curthread);
2547 }
2548
2549 /*
2550 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2551 * drivers need this.
2552 */
2553 mtx_lock(&Giant);
2554
2555 slp_state = ACPI_SS_NONE;
2556
2557 sc->acpi_sstate = state;
2558
2559 /* Enable any GPEs as appropriate and requested by the user. */
2560 acpi_wake_prep_walk(state);
2561 slp_state = ACPI_SS_GPE_SET;
2562
2563 /*
2564 * Inform all devices that we are going to sleep. If at least one
2565 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2566 *
2567 * XXX Note that a better two-pass approach with a 'veto' pass
2568 * followed by a "real thing" pass would be better, but the current
2569 * bus interface does not provide for this.
2570 */
2571 if (DEVICE_SUSPEND(root_bus) != 0) {
2572 device_printf(sc->acpi_dev, "device_suspend failed\n");
2573 goto backout;
2574 }
2575 slp_state = ACPI_SS_DEV_SUSPEND;
2576
2577 /* If testing device suspend only, back out of everything here. */
2578 if (acpi_susp_bounce)
2579 goto backout;
2580
2581 status = AcpiEnterSleepStatePrep(state);
2582 if (ACPI_FAILURE(status)) {
2583 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2584 AcpiFormatException(status));
2585 goto backout;
2586 }
2587 slp_state = ACPI_SS_SLP_PREP;
2588
2589 if (sc->acpi_sleep_delay > 0)
2590 DELAY(sc->acpi_sleep_delay * 1000000);
2591
2592 if (state != ACPI_STATE_S1) {
2593 acpi_sleep_machdep(sc, state);
2594
2595 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2596 if (state == ACPI_STATE_S4)
2597 AcpiEnable();
2598 } else {
2599 ACPI_DISABLE_IRQS();
2600 status = AcpiEnterSleepState(state);
2601 if (ACPI_FAILURE(status)) {
2602 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2603 AcpiFormatException(status));
2604 goto backout;
2605 }
2606 }
2607 slp_state = ACPI_SS_SLEPT;
2608
2609 /*
2610 * Back out state according to how far along we got in the suspend
2611 * process. This handles both the error and success cases.
2612 */
2613 backout:
2614 if (slp_state >= ACPI_SS_GPE_SET) {
2615 acpi_wake_prep_walk(state);
2616 sc->acpi_sstate = ACPI_STATE_S0;
2617 }
2618 if (slp_state >= ACPI_SS_SLP_PREP)
2619 AcpiLeaveSleepState(state);
2620 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2621 DEVICE_RESUME(root_bus);
2622 if (slp_state >= ACPI_SS_SLEPT)
2623 acpi_enable_fixed_events(sc);
2624 sc->acpi_next_sstate = 0;
2625
2626 mtx_unlock(&Giant);
2627
2628 if (smp_started) {
2629 thread_lock(curthread);
2630 sched_unbind(curthread);
2631 thread_unlock(curthread);
2632 }
2633
2634 EVENTHANDLER_INVOKE(power_resume);
2635
2636 /* Allow another sleep request after a while. */
2637 timeout(acpi_sleep_enable, sc, hz * ACPI_MINIMUM_AWAKETIME);
2638
2639 /* Run /etc/rc.resume after we are back. */
2640 if (devctl_process_running())
2641 acpi_UserNotify("Resume", ACPI_ROOT_OBJECT, state);
2642
2643 return_ACPI_STATUS (status);
2644 }
2645
2646 void
2647 acpi_resync_clock(struct acpi_softc *sc)
2648 {
2649
2650 if (!acpi_reset_clock)
2651 return;
2652
2653 /*
2654 * Warm up timecounter again and reset system clock.
2655 */
2656 (void)timecounter->tc_get_timecount(timecounter);
2657 (void)timecounter->tc_get_timecount(timecounter);
2658 inittodr(time_second + sc->acpi_sleep_delay);
2659 }
2660
2661 /* Enable or disable the device's wake GPE. */
2662 int
2663 acpi_wake_set_enable(device_t dev, int enable)
2664 {
2665 struct acpi_prw_data prw;
2666 ACPI_STATUS status;
2667 int flags;
2668
2669 /* Make sure the device supports waking the system and get the GPE. */
2670 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2671 return (ENXIO);
2672
2673 flags = acpi_get_flags(dev);
2674 if (enable) {
2675 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2676 if (ACPI_FAILURE(status)) {
2677 device_printf(dev, "enable wake failed\n");
2678 return (ENXIO);
2679 }
2680 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2681 } else {
2682 status = AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2683 if (ACPI_FAILURE(status)) {
2684 device_printf(dev, "disable wake failed\n");
2685 return (ENXIO);
2686 }
2687 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2688 }
2689
2690 return (0);
2691 }
2692
2693 static int
2694 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2695 {
2696 struct acpi_prw_data prw;
2697 device_t dev;
2698
2699 /* Check that this is a wake-capable device and get its GPE. */
2700 if (acpi_parse_prw(handle, &prw) != 0)
2701 return (ENXIO);
2702 dev = acpi_get_device(handle);
2703
2704 /*
2705 * The destination sleep state must be less than (i.e., higher power)
2706 * or equal to the value specified by _PRW. If this GPE cannot be
2707 * enabled for the next sleep state, then disable it. If it can and
2708 * the user requested it be enabled, turn on any required power resources
2709 * and set _PSW.
2710 */
2711 if (sstate > prw.lowest_wake) {
2712 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_DISABLE);
2713 if (bootverbose)
2714 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2715 acpi_name(handle), sstate);
2716 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2717 acpi_pwr_wake_enable(handle, 1);
2718 acpi_SetInteger(handle, "_PSW", 1);
2719 if (bootverbose)
2720 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2721 acpi_name(handle), sstate);
2722 }
2723
2724 return (0);
2725 }
2726
2727 static int
2728 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2729 {
2730 struct acpi_prw_data prw;
2731 device_t dev;
2732
2733 /*
2734 * Check that this is a wake-capable device and get its GPE. Return
2735 * now if the user didn't enable this device for wake.
2736 */
2737 if (acpi_parse_prw(handle, &prw) != 0)
2738 return (ENXIO);
2739 dev = acpi_get_device(handle);
2740 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2741 return (0);
2742
2743 /*
2744 * If this GPE couldn't be enabled for the previous sleep state, it was
2745 * disabled before going to sleep so re-enable it. If it was enabled,
2746 * clear _PSW and turn off any power resources it used.
2747 */
2748 if (sstate > prw.lowest_wake) {
2749 AcpiGpeWakeup(prw.gpe_handle, prw.gpe_bit, ACPI_GPE_ENABLE);
2750 if (bootverbose)
2751 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2752 } else {
2753 acpi_SetInteger(handle, "_PSW", 0);
2754 acpi_pwr_wake_enable(handle, 0);
2755 if (bootverbose)
2756 device_printf(dev, "run_prep cleaned up for %s\n",
2757 acpi_name(handle));
2758 }
2759
2760 return (0);
2761 }
2762
2763 static ACPI_STATUS
2764 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2765 {
2766 int sstate;
2767
2768 /* If suspending, run the sleep prep function, otherwise wake. */
2769 sstate = *(int *)context;
2770 if (AcpiGbl_SystemAwakeAndRunning)
2771 acpi_wake_sleep_prep(handle, sstate);
2772 else
2773 acpi_wake_run_prep(handle, sstate);
2774 return (AE_OK);
2775 }
2776
2777 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2778 static int
2779 acpi_wake_prep_walk(int sstate)
2780 {
2781 ACPI_HANDLE sb_handle;
2782
2783 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2784 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2785 acpi_wake_prep, NULL, &sstate, NULL);
2786 return (0);
2787 }
2788
2789 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2790 static int
2791 acpi_wake_sysctl_walk(device_t dev)
2792 {
2793 int error, i, numdevs;
2794 device_t *devlist;
2795 device_t child;
2796 ACPI_STATUS status;
2797
2798 error = device_get_children(dev, &devlist, &numdevs);
2799 if (error != 0 || numdevs == 0) {
2800 if (numdevs == 0)
2801 free(devlist, M_TEMP);
2802 return (error);
2803 }
2804 for (i = 0; i < numdevs; i++) {
2805 child = devlist[i];
2806 acpi_wake_sysctl_walk(child);
2807 if (!device_is_attached(child))
2808 continue;
2809 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2810 if (ACPI_SUCCESS(status)) {
2811 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2812 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2813 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2814 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2815 }
2816 }
2817 free(devlist, M_TEMP);
2818
2819 return (0);
2820 }
2821
2822 /* Enable or disable wake from userland. */
2823 static int
2824 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2825 {
2826 int enable, error;
2827 device_t dev;
2828
2829 dev = (device_t)arg1;
2830 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2831
2832 error = sysctl_handle_int(oidp, &enable, 0, req);
2833 if (error != 0 || req->newptr == NULL)
2834 return (error);
2835 if (enable != 0 && enable != 1)
2836 return (EINVAL);
2837
2838 return (acpi_wake_set_enable(dev, enable));
2839 }
2840
2841 /* Parse a device's _PRW into a structure. */
2842 int
2843 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2844 {
2845 ACPI_STATUS status;
2846 ACPI_BUFFER prw_buffer;
2847 ACPI_OBJECT *res, *res2;
2848 int error, i, power_count;
2849
2850 if (h == NULL || prw == NULL)
2851 return (EINVAL);
2852
2853 /*
2854 * The _PRW object (7.2.9) is only required for devices that have the
2855 * ability to wake the system from a sleeping state.
2856 */
2857 error = EINVAL;
2858 prw_buffer.Pointer = NULL;
2859 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2860 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2861 if (ACPI_FAILURE(status))
2862 return (ENOENT);
2863 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2864 if (res == NULL)
2865 return (ENOENT);
2866 if (!ACPI_PKG_VALID(res, 2))
2867 goto out;
2868
2869 /*
2870 * Element 1 of the _PRW object:
2871 * The lowest power system sleeping state that can be entered while still
2872 * providing wake functionality. The sleeping state being entered must
2873 * be less than (i.e., higher power) or equal to this value.
2874 */
2875 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2876 goto out;
2877
2878 /*
2879 * Element 0 of the _PRW object:
2880 */
2881 switch (res->Package.Elements[0].Type) {
2882 case ACPI_TYPE_INTEGER:
2883 /*
2884 * If the data type of this package element is numeric, then this
2885 * _PRW package element is the bit index in the GPEx_EN, in the
2886 * GPE blocks described in the FADT, of the enable bit that is
2887 * enabled for the wake event.
2888 */
2889 prw->gpe_handle = NULL;
2890 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2891 error = 0;
2892 break;
2893 case ACPI_TYPE_PACKAGE:
2894 /*
2895 * If the data type of this package element is a package, then this
2896 * _PRW package element is itself a package containing two
2897 * elements. The first is an object reference to the GPE Block
2898 * device that contains the GPE that will be triggered by the wake
2899 * event. The second element is numeric and it contains the bit
2900 * index in the GPEx_EN, in the GPE Block referenced by the
2901 * first element in the package, of the enable bit that is enabled for
2902 * the wake event.
2903 *
2904 * For example, if this field is a package then it is of the form:
2905 * Package() {\_SB.PCI0.ISA.GPE, 2}
2906 */
2907 res2 = &res->Package.Elements[0];
2908 if (!ACPI_PKG_VALID(res2, 2))
2909 goto out;
2910 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2911 if (prw->gpe_handle == NULL)
2912 goto out;
2913 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2914 goto out;
2915 error = 0;
2916 break;
2917 default:
2918 goto out;
2919 }
2920
2921 /* Elements 2 to N of the _PRW object are power resources. */
2922 power_count = res->Package.Count - 2;
2923 if (power_count > ACPI_PRW_MAX_POWERRES) {
2924 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2925 power_count = 0;
2926 }
2927 prw->power_res_count = power_count;
2928 for (i = 0; i < power_count; i++)
2929 prw->power_res[i] = res->Package.Elements[i];
2930
2931 out:
2932 if (prw_buffer.Pointer != NULL)
2933 AcpiOsFree(prw_buffer.Pointer);
2934 return (error);
2935 }
2936
2937 /*
2938 * ACPI Event Handlers
2939 */
2940
2941 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2942
2943 static void
2944 acpi_system_eventhandler_sleep(void *arg, int state)
2945 {
2946 struct acpi_softc *sc = (struct acpi_softc *)arg;
2947 int ret;
2948
2949 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2950
2951 /* Check if button action is disabled or unknown. */
2952 if (state == ACPI_STATE_UNKNOWN)
2953 return;
2954
2955 /* Request that the system prepare to enter the given suspend state. */
2956 ret = acpi_ReqSleepState(sc, state);
2957 if (ret != 0)
2958 device_printf(sc->acpi_dev,
2959 "request to enter state S%d failed (err %d)\n", state, ret);
2960
2961 return_VOID;
2962 }
2963
2964 static void
2965 acpi_system_eventhandler_wakeup(void *arg, int state)
2966 {
2967
2968 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2969
2970 /* Currently, nothing to do for wakeup. */
2971
2972 return_VOID;
2973 }
2974
2975 /*
2976 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2977 */
2978 UINT32
2979 acpi_event_power_button_sleep(void *context)
2980 {
2981 struct acpi_softc *sc = (struct acpi_softc *)context;
2982
2983 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2984
2985 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2986
2987 return_VALUE (ACPI_INTERRUPT_HANDLED);
2988 }
2989
2990 UINT32
2991 acpi_event_power_button_wake(void *context)
2992 {
2993 struct acpi_softc *sc = (struct acpi_softc *)context;
2994
2995 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2996
2997 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2998
2999 return_VALUE (ACPI_INTERRUPT_HANDLED);
3000 }
3001
3002 UINT32
3003 acpi_event_sleep_button_sleep(void *context)
3004 {
3005 struct acpi_softc *sc = (struct acpi_softc *)context;
3006
3007 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3008
3009 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
3010
3011 return_VALUE (ACPI_INTERRUPT_HANDLED);
3012 }
3013
3014 UINT32
3015 acpi_event_sleep_button_wake(void *context)
3016 {
3017 struct acpi_softc *sc = (struct acpi_softc *)context;
3018
3019 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
3020
3021 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
3022
3023 return_VALUE (ACPI_INTERRUPT_HANDLED);
3024 }
3025
3026 /*
3027 * XXX This static buffer is suboptimal. There is no locking so only
3028 * use this for single-threaded callers.
3029 */
3030 char *
3031 acpi_name(ACPI_HANDLE handle)
3032 {
3033 ACPI_BUFFER buf;
3034 static char data[256];
3035
3036 buf.Length = sizeof(data);
3037 buf.Pointer = data;
3038
3039 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
3040 return (data);
3041 return ("(unknown)");
3042 }
3043
3044 /*
3045 * Debugging/bug-avoidance. Avoid trying to fetch info on various
3046 * parts of the namespace.
3047 */
3048 int
3049 acpi_avoid(ACPI_HANDLE handle)
3050 {
3051 char *cp, *env, *np;
3052 int len;
3053
3054 np = acpi_name(handle);
3055 if (*np == '\\')
3056 np++;
3057 if ((env = getenv("debug.acpi.avoid")) == NULL)
3058 return (0);
3059
3060 /* Scan the avoid list checking for a match */
3061 cp = env;
3062 for (;;) {
3063 while (*cp != 0 && isspace(*cp))
3064 cp++;
3065 if (*cp == 0)
3066 break;
3067 len = 0;
3068 while (cp[len] != 0 && !isspace(cp[len]))
3069 len++;
3070 if (!strncmp(cp, np, len)) {
3071 freeenv(env);
3072 return(1);
3073 }
3074 cp += len;
3075 }
3076 freeenv(env);
3077
3078 return (0);
3079 }
3080
3081 /*
3082 * Debugging/bug-avoidance. Disable ACPI subsystem components.
3083 */
3084 int
3085 acpi_disabled(char *subsys)
3086 {
3087 char *cp, *env;
3088 int len;
3089
3090 if ((env = getenv("debug.acpi.disabled")) == NULL)
3091 return (0);
3092 if (strcmp(env, "all") == 0) {
3093 freeenv(env);
3094 return (1);
3095 }
3096
3097 /* Scan the disable list, checking for a match. */
3098 cp = env;
3099 for (;;) {
3100 while (*cp != '\0' && isspace(*cp))
3101 cp++;
3102 if (*cp == '\0')
3103 break;
3104 len = 0;
3105 while (cp[len] != '\0' && !isspace(cp[len]))
3106 len++;
3107 if (strncmp(cp, subsys, len) == 0) {
3108 freeenv(env);
3109 return (1);
3110 }
3111 cp += len;
3112 }
3113 freeenv(env);
3114
3115 return (0);
3116 }
3117
3118 /*
3119 * Control interface.
3120 *
3121 * We multiplex ioctls for all participating ACPI devices here. Individual
3122 * drivers wanting to be accessible via /dev/acpi should use the
3123 * register/deregister interface to make their handlers visible.
3124 */
3125 struct acpi_ioctl_hook
3126 {
3127 TAILQ_ENTRY(acpi_ioctl_hook) link;
3128 u_long cmd;
3129 acpi_ioctl_fn fn;
3130 void *arg;
3131 };
3132
3133 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
3134 static int acpi_ioctl_hooks_initted;
3135
3136 int
3137 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
3138 {
3139 struct acpi_ioctl_hook *hp;
3140
3141 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
3142 return (ENOMEM);
3143 hp->cmd = cmd;
3144 hp->fn = fn;
3145 hp->arg = arg;
3146
3147 ACPI_LOCK(acpi);
3148 if (acpi_ioctl_hooks_initted == 0) {
3149 TAILQ_INIT(&acpi_ioctl_hooks);
3150 acpi_ioctl_hooks_initted = 1;
3151 }
3152 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
3153 ACPI_UNLOCK(acpi);
3154
3155 return (0);
3156 }
3157
3158 void
3159 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
3160 {
3161 struct acpi_ioctl_hook *hp;
3162
3163 ACPI_LOCK(acpi);
3164 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
3165 if (hp->cmd == cmd && hp->fn == fn)
3166 break;
3167
3168 if (hp != NULL) {
3169 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
3170 free(hp, M_ACPIDEV);
3171 }
3172 ACPI_UNLOCK(acpi);
3173 }
3174
3175 static int
3176 acpiopen(struct cdev *dev, int flag, int fmt, struct thread *td)
3177 {
3178 return (0);
3179 }
3180
3181 static int
3182 acpiclose(struct cdev *dev, int flag, int fmt, struct thread *td)
3183 {
3184 return (0);
3185 }
3186
3187 static int
3188 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
3189 {
3190 struct acpi_softc *sc;
3191 struct acpi_ioctl_hook *hp;
3192 int error, state;
3193
3194 error = 0;
3195 hp = NULL;
3196 sc = dev->si_drv1;
3197
3198 /*
3199 * Scan the list of registered ioctls, looking for handlers.
3200 */
3201 ACPI_LOCK(acpi);
3202 if (acpi_ioctl_hooks_initted)
3203 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
3204 if (hp->cmd == cmd)
3205 break;
3206 }
3207 ACPI_UNLOCK(acpi);
3208 if (hp)
3209 return (hp->fn(cmd, addr, hp->arg));
3210
3211 /*
3212 * Core ioctls are not permitted for non-writable user.
3213 * Currently, other ioctls just fetch information.
3214 * Not changing system behavior.
3215 */
3216 if ((flag & FWRITE) == 0)
3217 return (EPERM);
3218
3219 /* Core system ioctls. */
3220 switch (cmd) {
3221 case ACPIIO_REQSLPSTATE:
3222 state = *(int *)addr;
3223 if (state != ACPI_STATE_S5)
3224 return (acpi_ReqSleepState(sc, state));
3225 device_printf(sc->acpi_dev, "power off via acpi ioctl not supported\n");
3226 error = EOPNOTSUPP;
3227 break;
3228 case ACPIIO_ACKSLPSTATE:
3229 error = *(int *)addr;
3230 error = acpi_AckSleepState(sc->acpi_clone, error);
3231 break;
3232 case ACPIIO_SETSLPSTATE: /* DEPRECATED */
3233 state = *(int *)addr;
3234 if (state < ACPI_STATE_S0 || state > ACPI_S_STATES_MAX)
3235 return (EINVAL);
3236 if (!acpi_sleep_states[state])
3237 return (EOPNOTSUPP);
3238 if (ACPI_FAILURE(acpi_SetSleepState(sc, state)))
3239 error = ENXIO;
3240 break;
3241 default:
3242 error = ENXIO;
3243 break;
3244 }
3245
3246 return (error);
3247 }
3248
3249 static int
3250 acpi_sname2sstate(const char *sname)
3251 {
3252 int sstate;
3253
3254 if (toupper(sname[0]) == 'S') {
3255 sstate = sname[1] - '';
3256 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5 &&
3257 sname[2] == '\0')
3258 return (sstate);
3259 } else if (strcasecmp(sname, "NONE") == 0)
3260 return (ACPI_STATE_UNKNOWN);
3261 return (-1);
3262 }
3263
3264 static const char *
3265 acpi_sstate2sname(int sstate)
3266 {
3267 static const char *snames[] = { "S0", "S1", "S2", "S3", "S4", "S5" };
3268
3269 if (sstate >= ACPI_STATE_S0 && sstate <= ACPI_STATE_S5)
3270 return (snames[sstate]);
3271 else if (sstate == ACPI_STATE_UNKNOWN)
3272 return ("NONE");
3273 return (NULL);
3274 }
3275
3276 static int
3277 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3278 {
3279 int error;
3280 struct sbuf sb;
3281 UINT8 state;
3282
3283 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
3284 for (state = ACPI_STATE_S1; state < ACPI_S_STATE_COUNT; state++)
3285 if (acpi_sleep_states[state])
3286 sbuf_printf(&sb, "%s ", acpi_sstate2sname(state));
3287 sbuf_trim(&sb);
3288 sbuf_finish(&sb);
3289 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
3290 sbuf_delete(&sb);
3291 return (error);
3292 }
3293
3294 static int
3295 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
3296 {
3297 char sleep_state[10];
3298 int error, new_state, old_state;
3299
3300 old_state = *(int *)oidp->oid_arg1;
3301 strlcpy(sleep_state, acpi_sstate2sname(old_state), sizeof(sleep_state));
3302 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
3303 if (error == 0 && req->newptr != NULL) {
3304 new_state = acpi_sname2sstate(sleep_state);
3305 if (new_state < ACPI_STATE_S1)
3306 return (EINVAL);
3307 if (new_state < ACPI_S_STATE_COUNT && !acpi_sleep_states[new_state])
3308 return (EOPNOTSUPP);
3309 if (new_state != old_state)
3310 *(int *)oidp->oid_arg1 = new_state;
3311 }
3312 return (error);
3313 }
3314
3315 /* Inform devctl(4) when we receive a Notify. */
3316 void
3317 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
3318 {
3319 char notify_buf[16];
3320 ACPI_BUFFER handle_buf;
3321 ACPI_STATUS status;
3322
3323 if (subsystem == NULL)
3324 return;
3325
3326 handle_buf.Pointer = NULL;
3327 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
3328 status = AcpiNsHandleToPathname(h, &handle_buf);
3329 if (ACPI_FAILURE(status))
3330 return;
3331 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
3332 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
3333 AcpiOsFree(handle_buf.Pointer);
3334 }
3335
3336 #ifdef ACPI_DEBUG
3337 /*
3338 * Support for parsing debug options from the kernel environment.
3339 *
3340 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
3341 * by specifying the names of the bits in the debug.acpi.layer and
3342 * debug.acpi.level environment variables. Bits may be unset by
3343 * prefixing the bit name with !.
3344 */
3345 struct debugtag
3346 {
3347 char *name;
3348 UINT32 value;
3349 };
3350
3351 static struct debugtag dbg_layer[] = {
3352 {"ACPI_UTILITIES", ACPI_UTILITIES},
3353 {"ACPI_HARDWARE", ACPI_HARDWARE},
3354 {"ACPI_EVENTS", ACPI_EVENTS},
3355 {"ACPI_TABLES", ACPI_TABLES},
3356 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
3357 {"ACPI_PARSER", ACPI_PARSER},
3358 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
3359 {"ACPI_EXECUTER", ACPI_EXECUTER},
3360 {"ACPI_RESOURCES", ACPI_RESOURCES},
3361 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
3362 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
3363 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
3364 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
3365
3366 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
3367 {"ACPI_BATTERY", ACPI_BATTERY},
3368 {"ACPI_BUS", ACPI_BUS},
3369 {"ACPI_BUTTON", ACPI_BUTTON},
3370 {"ACPI_EC", ACPI_EC},
3371 {"ACPI_FAN", ACPI_FAN},
3372 {"ACPI_POWERRES", ACPI_POWERRES},
3373 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
3374 {"ACPI_THERMAL", ACPI_THERMAL},
3375 {"ACPI_TIMER", ACPI_TIMER},
3376 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
3377 {NULL, 0}
3378 };
3379
3380 static struct debugtag dbg_level[] = {
3381 {"ACPI_LV_INIT", ACPI_LV_INIT},
3382 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
3383 {"ACPI_LV_INFO", ACPI_LV_INFO},
3384 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
3385
3386 /* Trace verbosity level 1 [Standard Trace Level] */
3387 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
3388 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
3389 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
3390 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
3391 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
3392 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
3393 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
3394 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
3395 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
3396 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
3397 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
3398 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
3399 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
3400 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
3401 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
3402
3403 /* Trace verbosity level 2 [Function tracing and memory allocation] */
3404 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
3405 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
3406 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
3407 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
3408 {"ACPI_LV_ALL", ACPI_LV_ALL},
3409
3410 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
3411 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
3412 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
3413 {"ACPI_LV_IO", ACPI_LV_IO},
3414 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
3415 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
3416
3417 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
3418 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
3419 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
3420 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
3421 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
3422 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
3423 {NULL, 0}
3424 };
3425
3426 static void
3427 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
3428 {
3429 char *ep;
3430 int i, l;
3431 int set;
3432
3433 while (*cp) {
3434 if (isspace(*cp)) {
3435 cp++;
3436 continue;
3437 }
3438 ep = cp;
3439 while (*ep && !isspace(*ep))
3440 ep++;
3441 if (*cp == '!') {
3442 set = 0;
3443 cp++;
3444 if (cp == ep)
3445 continue;
3446 } else {
3447 set = 1;
3448 }
3449 l = ep - cp;
3450 for (i = 0; tag[i].name != NULL; i++) {
3451 if (!strncmp(cp, tag[i].name, l)) {
3452 if (set)
3453 *flag |= tag[i].value;
3454 else
3455 *flag &= ~tag[i].value;
3456 }
3457 }
3458 cp = ep;
3459 }
3460 }
3461
3462 static void
3463 acpi_set_debugging(void *junk)
3464 {
3465 char *layer, *level;
3466
3467 if (cold) {
3468 AcpiDbgLayer = 0;
3469 AcpiDbgLevel = 0;
3470 }
3471
3472 layer = getenv("debug.acpi.layer");
3473 level = getenv("debug.acpi.level");
3474 if (layer == NULL && level == NULL)
3475 return;
3476
3477 printf("ACPI set debug");
3478 if (layer != NULL) {
3479 if (strcmp("NONE", layer) != 0)
3480 printf(" layer '%s'", layer);
3481 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3482 freeenv(layer);
3483 }
3484 if (level != NULL) {
3485 if (strcmp("NONE", level) != 0)
3486 printf(" level '%s'", level);
3487 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3488 freeenv(level);
3489 }
3490 printf("\n");
3491 }
3492
3493 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3494 NULL);
3495
3496 static int
3497 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3498 {
3499 int error, *dbg;
3500 struct debugtag *tag;
3501 struct sbuf sb;
3502
3503 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3504 return (ENOMEM);
3505 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3506 tag = &dbg_layer[0];
3507 dbg = &AcpiDbgLayer;
3508 } else {
3509 tag = &dbg_level[0];
3510 dbg = &AcpiDbgLevel;
3511 }
3512
3513 /* Get old values if this is a get request. */
3514 ACPI_SERIAL_BEGIN(acpi);
3515 if (*dbg == 0) {
3516 sbuf_cpy(&sb, "NONE");
3517 } else if (req->newptr == NULL) {
3518 for (; tag->name != NULL; tag++) {
3519 if ((*dbg & tag->value) == tag->value)
3520 sbuf_printf(&sb, "%s ", tag->name);
3521 }
3522 }
3523 sbuf_trim(&sb);
3524 sbuf_finish(&sb);
3525
3526 /* Copy out the old values to the user. */
3527 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3528 sbuf_delete(&sb);
3529
3530 /* If the user is setting a string, parse it. */
3531 if (error == 0 && req->newptr != NULL) {
3532 *dbg = 0;
3533 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3534 acpi_set_debugging(NULL);
3535 }
3536 ACPI_SERIAL_END(acpi);
3537
3538 return (error);
3539 }
3540
3541 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3542 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3543 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3544 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3545 #endif /* ACPI_DEBUG */
3546
3547 static int
3548 acpi_debug_objects_sysctl(SYSCTL_HANDLER_ARGS)
3549 {
3550 int error;
3551 int old;
3552
3553 old = acpi_debug_objects;
3554 error = sysctl_handle_int(oidp, &acpi_debug_objects, 0, req);
3555 if (error != 0 || req->newptr == NULL)
3556 return (error);
3557 if (old == acpi_debug_objects || (old && acpi_debug_objects))
3558 return (0);
3559
3560 ACPI_SERIAL_BEGIN(acpi);
3561 AcpiGbl_EnableAmlDebugObject = acpi_debug_objects ? TRUE : FALSE;
3562 ACPI_SERIAL_END(acpi);
3563
3564 return (0);
3565 }
3566
3567 static int
3568 acpi_parse_interfaces(char *str, struct acpi_interface *iface)
3569 {
3570 char *p;
3571 size_t len;
3572 int i, j;
3573
3574 p = str;
3575 while (isspace(*p) || *p == ',')
3576 p++;
3577 len = strlen(p);
3578 if (len == 0)
3579 return (0);
3580 p = strdup(p, M_TEMP);
3581 for (i = 0; i < len; i++)
3582 if (p[i] == ',')
3583 p[i] = '\0';
3584 i = j = 0;
3585 while (i < len)
3586 if (isspace(p[i]) || p[i] == '\0')
3587 i++;
3588 else {
3589 i += strlen(p + i) + 1;
3590 j++;
3591 }
3592 if (j == 0) {
3593 free(p, M_TEMP);
3594 return (0);
3595 }
3596 iface->data = malloc(sizeof(*iface->data) * j, M_TEMP, M_WAITOK);
3597 iface->num = j;
3598 i = j = 0;
3599 while (i < len)
3600 if (isspace(p[i]) || p[i] == '\0')
3601 i++;
3602 else {
3603 iface->data[j] = p + i;
3604 i += strlen(p + i) + 1;
3605 j++;
3606 }
3607
3608 return (j);
3609 }
3610
3611 static void
3612 acpi_free_interfaces(struct acpi_interface *iface)
3613 {
3614
3615 free(iface->data[0], M_TEMP);
3616 free(iface->data, M_TEMP);
3617 }
3618
3619 static void
3620 acpi_reset_interfaces(device_t dev)
3621 {
3622 struct acpi_interface list;
3623 ACPI_STATUS status;
3624 int i;
3625
3626 if (acpi_parse_interfaces(acpi_install_interface, &list) > 0) {
3627 for (i = 0; i < list.num; i++) {
3628 status = AcpiInstallInterface(list.data[i]);
3629 if (ACPI_FAILURE(status))
3630 device_printf(dev,
3631 "failed to install _OSI(\"%s\"): %s\n",
3632 list.data[i], AcpiFormatException(status));
3633 else if (bootverbose)
3634 device_printf(dev, "installed _OSI(\"%s\")\n",
3635 list.data[i]);
3636 }
3637 acpi_free_interfaces(&list);
3638 }
3639 if (acpi_parse_interfaces(acpi_remove_interface, &list) > 0) {
3640 for (i = 0; i < list.num; i++) {
3641 status = AcpiRemoveInterface(list.data[i]);
3642 if (ACPI_FAILURE(status))
3643 device_printf(dev,
3644 "failed to remove _OSI(\"%s\"): %s\n",
3645 list.data[i], AcpiFormatException(status));
3646 else if (bootverbose)
3647 device_printf(dev, "removed _OSI(\"%s\")\n",
3648 list.data[i]);
3649 }
3650 acpi_free_interfaces(&list);
3651 }
3652 }
3653
3654 static int
3655 acpi_pm_func(u_long cmd, void *arg, ...)
3656 {
3657 int state, acpi_state;
3658 int error;
3659 struct acpi_softc *sc;
3660 va_list ap;
3661
3662 error = 0;
3663 switch (cmd) {
3664 case POWER_CMD_SUSPEND:
3665 sc = (struct acpi_softc *)arg;
3666 if (sc == NULL) {
3667 error = EINVAL;
3668 goto out;
3669 }
3670
3671 va_start(ap, arg);
3672 state = va_arg(ap, int);
3673 va_end(ap);
3674
3675 switch (state) {
3676 case POWER_SLEEP_STATE_STANDBY:
3677 acpi_state = sc->acpi_standby_sx;
3678 break;
3679 case POWER_SLEEP_STATE_SUSPEND:
3680 acpi_state = sc->acpi_suspend_sx;
3681 break;
3682 case POWER_SLEEP_STATE_HIBERNATE:
3683 acpi_state = ACPI_STATE_S4;
3684 break;
3685 default:
3686 error = EINVAL;
3687 goto out;
3688 }
3689
3690 if (ACPI_FAILURE(acpi_EnterSleepState(sc, acpi_state)))
3691 error = ENXIO;
3692 break;
3693 default:
3694 error = EINVAL;
3695 goto out;
3696 }
3697
3698 out:
3699 return (error);
3700 }
3701
3702 static void
3703 acpi_pm_register(void *arg)
3704 {
3705 if (!cold || resource_disabled("acpi", 0))
3706 return;
3707
3708 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3709 }
3710
3711 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: 432017e00235655ccefc9b6fa2c6bdf6
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