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/6.2/sys/dev/acpica/acpi.c 163010 2006-10-04 19:08:23Z jhb $");
32
33 #include "opt_acpi.h"
34 #include <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/proc.h>
37 #include <sys/fcntl.h>
38 #include <sys/malloc.h>
39 #include <sys/module.h>
40 #include <sys/bus.h>
41 #include <sys/conf.h>
42 #include <sys/ioccom.h>
43 #include <sys/reboot.h>
44 #include <sys/sysctl.h>
45 #include <sys/ctype.h>
46 #include <sys/linker.h>
47 #include <sys/power.h>
48 #include <sys/sbuf.h>
49 #include <sys/smp.h>
50
51 #include <machine/resource.h>
52 #include <machine/bus.h>
53 #include <sys/rman.h>
54 #include <isa/isavar.h>
55 #include <isa/pnpvar.h>
56
57 #include <contrib/dev/acpica/acpi.h>
58 #include <dev/acpica/acpivar.h>
59 #include <dev/acpica/acpiio.h>
60 #include <contrib/dev/acpica/achware.h>
61 #include <contrib/dev/acpica/acnamesp.h>
62
63 #include "pci_if.h"
64 #include <dev/pci/pcivar.h>
65 #include <dev/pci/pci_private.h>
66
67 MALLOC_DEFINE(M_ACPIDEV, "acpidev", "ACPI devices");
68
69 /* Hooks for the ACPI CA debugging infrastructure */
70 #define _COMPONENT ACPI_BUS
71 ACPI_MODULE_NAME("ACPI")
72
73 static d_open_t acpiopen;
74 static d_close_t acpiclose;
75 static d_ioctl_t acpiioctl;
76
77 static struct cdevsw acpi_cdevsw = {
78 .d_version = D_VERSION,
79 .d_open = acpiopen,
80 .d_close = acpiclose,
81 .d_ioctl = acpiioctl,
82 .d_name = "acpi",
83 };
84
85 /* Global mutex for locking access to the ACPI subsystem. */
86 struct mtx acpi_mutex;
87
88 /* Bitmap of device quirks. */
89 int acpi_quirks;
90
91 static int acpi_modevent(struct module *mod, int event, void *junk);
92 static void acpi_identify(driver_t *driver, device_t parent);
93 static int acpi_probe(device_t dev);
94 static int acpi_attach(device_t dev);
95 static int acpi_suspend(device_t dev);
96 static int acpi_resume(device_t dev);
97 static int acpi_shutdown(device_t dev);
98 static device_t acpi_add_child(device_t bus, int order, const char *name,
99 int unit);
100 static int acpi_print_child(device_t bus, device_t child);
101 static void acpi_probe_nomatch(device_t bus, device_t child);
102 static void acpi_driver_added(device_t dev, driver_t *driver);
103 static int acpi_read_ivar(device_t dev, device_t child, int index,
104 uintptr_t *result);
105 static int acpi_write_ivar(device_t dev, device_t child, int index,
106 uintptr_t value);
107 static struct resource_list *acpi_get_rlist(device_t dev, device_t child);
108 static int acpi_sysres_alloc(device_t dev);
109 static struct resource_list_entry *acpi_sysres_find(device_t dev, int type,
110 u_long addr);
111 static struct resource *acpi_alloc_resource(device_t bus, device_t child,
112 int type, int *rid, u_long start, u_long end,
113 u_long count, u_int flags);
114 static int acpi_release_resource(device_t bus, device_t child, int type,
115 int rid, struct resource *r);
116 static void acpi_delete_resource(device_t bus, device_t child, int type,
117 int rid);
118 static uint32_t acpi_isa_get_logicalid(device_t dev);
119 static int acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count);
120 static char *acpi_device_id_probe(device_t bus, device_t dev, char **ids);
121 static ACPI_STATUS acpi_device_eval_obj(device_t bus, device_t dev,
122 ACPI_STRING pathname, ACPI_OBJECT_LIST *parameters,
123 ACPI_BUFFER *ret);
124 static int acpi_device_pwr_for_sleep(device_t bus, device_t dev,
125 int *dstate);
126 static ACPI_STATUS acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level,
127 void *context, void **retval);
128 static ACPI_STATUS acpi_device_scan_children(device_t bus, device_t dev,
129 int max_depth, acpi_scan_cb_t user_fn, void *arg);
130 static int acpi_set_powerstate_method(device_t bus, device_t child,
131 int state);
132 static int acpi_isa_pnp_probe(device_t bus, device_t child,
133 struct isa_pnp_id *ids);
134 static void acpi_probe_children(device_t bus);
135 static int acpi_probe_order(ACPI_HANDLE handle, int *order);
136 static ACPI_STATUS acpi_probe_child(ACPI_HANDLE handle, UINT32 level,
137 void *context, void **status);
138 static BOOLEAN acpi_MatchHid(ACPI_HANDLE h, const char *hid);
139 static void acpi_shutdown_final(void *arg, int howto);
140 static void acpi_enable_fixed_events(struct acpi_softc *sc);
141 static int acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate);
142 static int acpi_wake_run_prep(ACPI_HANDLE handle, int sstate);
143 static int acpi_wake_prep_walk(int sstate);
144 static int acpi_wake_sysctl_walk(device_t dev);
145 static int acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS);
146 static void acpi_system_eventhandler_sleep(void *arg, int state);
147 static void acpi_system_eventhandler_wakeup(void *arg, int state);
148 static int acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
149 static int acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS);
150 static int acpi_pm_func(u_long cmd, void *arg, ...);
151 static int acpi_child_location_str_method(device_t acdev, device_t child,
152 char *buf, size_t buflen);
153 static int acpi_child_pnpinfo_str_method(device_t acdev, device_t child,
154 char *buf, size_t buflen);
155
156 static device_method_t acpi_methods[] = {
157 /* Device interface */
158 DEVMETHOD(device_identify, acpi_identify),
159 DEVMETHOD(device_probe, acpi_probe),
160 DEVMETHOD(device_attach, acpi_attach),
161 DEVMETHOD(device_shutdown, acpi_shutdown),
162 DEVMETHOD(device_detach, bus_generic_detach),
163 DEVMETHOD(device_suspend, acpi_suspend),
164 DEVMETHOD(device_resume, acpi_resume),
165
166 /* Bus interface */
167 DEVMETHOD(bus_add_child, acpi_add_child),
168 DEVMETHOD(bus_print_child, acpi_print_child),
169 DEVMETHOD(bus_probe_nomatch, acpi_probe_nomatch),
170 DEVMETHOD(bus_driver_added, acpi_driver_added),
171 DEVMETHOD(bus_read_ivar, acpi_read_ivar),
172 DEVMETHOD(bus_write_ivar, acpi_write_ivar),
173 DEVMETHOD(bus_get_resource_list, acpi_get_rlist),
174 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource),
175 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource),
176 DEVMETHOD(bus_alloc_resource, acpi_alloc_resource),
177 DEVMETHOD(bus_release_resource, acpi_release_resource),
178 DEVMETHOD(bus_delete_resource, acpi_delete_resource),
179 DEVMETHOD(bus_child_pnpinfo_str, acpi_child_pnpinfo_str_method),
180 DEVMETHOD(bus_child_location_str, acpi_child_location_str_method),
181 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
182 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
183 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
184 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
185
186 /* ACPI bus */
187 DEVMETHOD(acpi_id_probe, acpi_device_id_probe),
188 DEVMETHOD(acpi_evaluate_object, acpi_device_eval_obj),
189 DEVMETHOD(acpi_pwr_for_sleep, acpi_device_pwr_for_sleep),
190 DEVMETHOD(acpi_scan_children, acpi_device_scan_children),
191
192 /* PCI emulation */
193 DEVMETHOD(pci_set_powerstate, acpi_set_powerstate_method),
194
195 /* ISA emulation */
196 DEVMETHOD(isa_pnp_probe, acpi_isa_pnp_probe),
197
198 {0, 0}
199 };
200
201 static driver_t acpi_driver = {
202 "acpi",
203 acpi_methods,
204 sizeof(struct acpi_softc),
205 };
206
207 static devclass_t acpi_devclass;
208 DRIVER_MODULE(acpi, nexus, acpi_driver, acpi_devclass, acpi_modevent, 0);
209 MODULE_VERSION(acpi, 1);
210
211 ACPI_SERIAL_DECL(acpi, "ACPI root bus");
212
213 /* Local pools for managing system resources for ACPI child devices. */
214 static struct rman acpi_rman_io, acpi_rman_mem;
215
216 #define ACPI_MINIMUM_AWAKETIME 5
217
218 static const char* sleep_state_names[] = {
219 "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
220
221 SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
222 static char acpi_ca_version[12];
223 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
224 acpi_ca_version, 0, "Version of Intel ACPI-CA");
225
226 /*
227 * Allow override of whether methods execute in parallel or not.
228 * Enable this for serial behavior, which fixes "AE_ALREADY_EXISTS"
229 * errors for AML that really can't handle parallel method execution.
230 * It is off by default since this breaks recursive methods and
231 * some IBMs use such code.
232 */
233 static int acpi_serialize_methods;
234 TUNABLE_INT("hw.acpi.serialize_methods", &acpi_serialize_methods);
235
236 /* Power devices off and on in suspend and resume. XXX Remove once tested. */
237 static int acpi_do_powerstate = 1;
238 TUNABLE_INT("debug.acpi.do_powerstate", &acpi_do_powerstate);
239 SYSCTL_INT(_debug_acpi, OID_AUTO, do_powerstate, CTLFLAG_RW,
240 &acpi_do_powerstate, 1, "Turn off devices when suspending.");
241
242 /* Allow users to override quirks. */
243 TUNABLE_INT("debug.acpi.quirks", &acpi_quirks);
244
245 /*
246 * ACPI can only be loaded as a module by the loader; activating it after
247 * system bootstrap time is not useful, and can be fatal to the system.
248 * It also cannot be unloaded, since the entire system bus heirarchy hangs
249 * off it.
250 */
251 static int
252 acpi_modevent(struct module *mod, int event, void *junk)
253 {
254 switch (event) {
255 case MOD_LOAD:
256 if (!cold) {
257 printf("The ACPI driver cannot be loaded after boot.\n");
258 return (EPERM);
259 }
260 break;
261 case MOD_UNLOAD:
262 if (!cold && power_pm_get_type() == POWER_PM_TYPE_ACPI)
263 return (EBUSY);
264 break;
265 default:
266 break;
267 }
268 return (0);
269 }
270
271 /*
272 * Perform early initialization.
273 */
274 ACPI_STATUS
275 acpi_Startup(void)
276 {
277 static int started = 0;
278 int error, val;
279
280 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
281
282 /* Only run the startup code once. The MADT driver also calls this. */
283 if (started)
284 return_VALUE (0);
285 started = 1;
286
287 /* Initialise the ACPI mutex */
288 mtx_init(&acpi_mutex, "ACPI global lock", NULL, MTX_DEF);
289
290 /*
291 * Set the globals from our tunables. This is needed because ACPI-CA
292 * uses UINT8 for some values and we have no tunable_byte.
293 */
294 AcpiGbl_AllMethodsSerialized = acpi_serialize_methods;
295 AcpiGbl_EnableInterpreterSlack = TRUE;
296
297 /* Start up the ACPI CA subsystem. */
298 if (ACPI_FAILURE(error = AcpiInitializeSubsystem())) {
299 printf("ACPI: initialisation failed: %s\n", AcpiFormatException(error));
300 return_VALUE (error);
301 }
302
303 if (ACPI_FAILURE(error = AcpiLoadTables())) {
304 printf("ACPI: table load failed: %s\n", AcpiFormatException(error));
305 AcpiTerminate();
306 return_VALUE (error);
307 }
308
309 /* Set up any quirks we have for this system. */
310 if (acpi_quirks == 0)
311 acpi_table_quirks(&acpi_quirks);
312
313 /* If the user manually set the disabled hint to 0, force-enable ACPI. */
314 if (resource_int_value("acpi", 0, "disabled", &val) == 0 && val == 0)
315 acpi_quirks &= ~ACPI_Q_BROKEN;
316 if (acpi_quirks & ACPI_Q_BROKEN) {
317 printf("ACPI disabled by blacklist. Contact your BIOS vendor.\n");
318 AcpiTerminate();
319 return_VALUE (AE_ERROR);
320 }
321
322 return_VALUE (AE_OK);
323 }
324
325 /*
326 * Detect ACPI, perform early initialisation
327 */
328 static void
329 acpi_identify(driver_t *driver, device_t parent)
330 {
331 device_t child;
332
333 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
334
335 if (!cold)
336 return_VOID;
337
338 /* Check that we haven't been disabled with a hint. */
339 if (resource_disabled("acpi", 0))
340 return_VOID;
341
342 /* Make sure we're not being doubly invoked. */
343 if (device_find_child(parent, "acpi", 0) != NULL)
344 return_VOID;
345
346 /* Initialize ACPI-CA. */
347 if (ACPI_FAILURE(acpi_Startup()))
348 return_VOID;
349
350 snprintf(acpi_ca_version, sizeof(acpi_ca_version), "%#x", ACPI_CA_VERSION);
351
352 /* Attach the actual ACPI device. */
353 if ((child = BUS_ADD_CHILD(parent, 0, "acpi", 0)) == NULL) {
354 device_printf(parent, "device_identify failed\n");
355 return_VOID;
356 }
357 }
358
359 /*
360 * Fetch some descriptive data from ACPI to put in our attach message.
361 */
362 static int
363 acpi_probe(device_t dev)
364 {
365 ACPI_TABLE_HEADER th;
366 char buf[20];
367 int error;
368 struct sbuf sb;
369 ACPI_STATUS status;
370
371 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
372
373 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
374 power_pm_get_type() != POWER_PM_TYPE_ACPI) {
375 device_printf(dev, "probe failed, other PM system enabled.\n");
376 return_VALUE (ENXIO);
377 }
378
379 if (ACPI_FAILURE(status = AcpiGetTableHeader(ACPI_TABLE_XSDT, 1, &th))) {
380 device_printf(dev, "couldn't get XSDT header: %s\n",
381 AcpiFormatException(status));
382 error = ENXIO;
383 } else {
384 sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
385 sbuf_bcat(&sb, th.OemId, 6);
386 sbuf_trim(&sb);
387 sbuf_putc(&sb, ' ');
388 sbuf_bcat(&sb, th.OemTableId, 8);
389 sbuf_trim(&sb);
390 sbuf_finish(&sb);
391 device_set_desc_copy(dev, sbuf_data(&sb));
392 sbuf_delete(&sb);
393 error = 0;
394 }
395
396 return_VALUE (error);
397 }
398
399 static int
400 acpi_attach(device_t dev)
401 {
402 struct acpi_softc *sc;
403 ACPI_STATUS status;
404 int error, state;
405 UINT32 flags;
406 UINT8 TypeA, TypeB;
407 char *env;
408
409 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
410
411 sc = device_get_softc(dev);
412 sc->acpi_dev = dev;
413
414 /* Initialize resource manager. */
415 acpi_rman_io.rm_type = RMAN_ARRAY;
416 acpi_rman_io.rm_start = 0;
417 acpi_rman_io.rm_end = 0xffff;
418 acpi_rman_io.rm_descr = "ACPI I/O ports";
419 if (rman_init(&acpi_rman_io) != 0)
420 panic("acpi rman_init IO ports failed");
421 acpi_rman_mem.rm_type = RMAN_ARRAY;
422 acpi_rman_mem.rm_start = 0;
423 acpi_rman_mem.rm_end = ~0ul;
424 acpi_rman_mem.rm_descr = "ACPI I/O memory addresses";
425 if (rman_init(&acpi_rman_mem) != 0)
426 panic("acpi rman_init memory failed");
427
428 /* Install the default address space handlers. */
429 error = ENXIO;
430 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
431 ACPI_ADR_SPACE_SYSTEM_MEMORY, ACPI_DEFAULT_HANDLER, NULL, NULL);
432 if (ACPI_FAILURE(status)) {
433 device_printf(dev, "Could not initialise SystemMemory handler: %s\n",
434 AcpiFormatException(status));
435 goto out;
436 }
437 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
438 ACPI_ADR_SPACE_SYSTEM_IO, ACPI_DEFAULT_HANDLER, NULL, NULL);
439 if (ACPI_FAILURE(status)) {
440 device_printf(dev, "Could not initialise SystemIO handler: %s\n",
441 AcpiFormatException(status));
442 goto out;
443 }
444 status = AcpiInstallAddressSpaceHandler(ACPI_ROOT_OBJECT,
445 ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL);
446 if (ACPI_FAILURE(status)) {
447 device_printf(dev, "could not initialise PciConfig handler: %s\n",
448 AcpiFormatException(status));
449 goto out;
450 }
451
452 /*
453 * Note that some systems (specifically, those with namespace evaluation
454 * issues that require the avoidance of parts of the namespace) must
455 * avoid running _INI and _STA on everything, as well as dodging the final
456 * object init pass.
457 *
458 * For these devices, we set ACPI_NO_DEVICE_INIT and ACPI_NO_OBJECT_INIT).
459 *
460 * XXX We should arrange for the object init pass after we have attached
461 * all our child devices, but on many systems it works here.
462 */
463 flags = 0;
464 if (testenv("debug.acpi.avoid"))
465 flags = ACPI_NO_DEVICE_INIT | ACPI_NO_OBJECT_INIT;
466
467 /* Bring the hardware and basic handlers online. */
468 if (ACPI_FAILURE(status = AcpiEnableSubsystem(flags))) {
469 device_printf(dev, "Could not enable ACPI: %s\n",
470 AcpiFormatException(status));
471 goto out;
472 }
473
474 /*
475 * Call the ECDT probe function to provide EC functionality before
476 * the namespace has been evaluated.
477 *
478 * XXX This happens before the sysresource devices have been probed and
479 * attached so its resources come from nexus0. In practice, this isn't
480 * a problem but should be addressed eventually.
481 */
482 acpi_ec_ecdt_probe(dev);
483
484 /* Bring device objects and regions online. */
485 if (ACPI_FAILURE(status = AcpiInitializeObjects(flags))) {
486 device_printf(dev, "Could not initialize ACPI objects: %s\n",
487 AcpiFormatException(status));
488 goto out;
489 }
490
491 /*
492 * Setup our sysctl tree.
493 *
494 * XXX: This doesn't check to make sure that none of these fail.
495 */
496 sysctl_ctx_init(&sc->acpi_sysctl_ctx);
497 sc->acpi_sysctl_tree = SYSCTL_ADD_NODE(&sc->acpi_sysctl_ctx,
498 SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
499 device_get_name(dev), CTLFLAG_RD, 0, "");
500 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
501 OID_AUTO, "supported_sleep_state", CTLTYPE_STRING | CTLFLAG_RD,
502 0, 0, acpi_supported_sleep_state_sysctl, "A", "");
503 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
504 OID_AUTO, "power_button_state", CTLTYPE_STRING | CTLFLAG_RW,
505 &sc->acpi_power_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
506 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
507 OID_AUTO, "sleep_button_state", CTLTYPE_STRING | CTLFLAG_RW,
508 &sc->acpi_sleep_button_sx, 0, acpi_sleep_state_sysctl, "A", "");
509 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
510 OID_AUTO, "lid_switch_state", CTLTYPE_STRING | CTLFLAG_RW,
511 &sc->acpi_lid_switch_sx, 0, acpi_sleep_state_sysctl, "A", "");
512 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
513 OID_AUTO, "standby_state", CTLTYPE_STRING | CTLFLAG_RW,
514 &sc->acpi_standby_sx, 0, acpi_sleep_state_sysctl, "A", "");
515 SYSCTL_ADD_PROC(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
516 OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
517 &sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
518 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
519 OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
520 "sleep delay");
521 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
522 OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
523 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
524 OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
525 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
526 OID_AUTO, "disable_on_reboot", CTLFLAG_RW,
527 &sc->acpi_do_disable, 0, "Disable ACPI when rebooting/halting system");
528 SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
529 OID_AUTO, "handle_reboot", CTLFLAG_RW,
530 &sc->acpi_handle_reboot, 0, "Use ACPI Reset Register to reboot");
531
532 /*
533 * Default to 1 second before sleeping to give some machines time to
534 * stabilize.
535 */
536 sc->acpi_sleep_delay = 1;
537 if (bootverbose)
538 sc->acpi_verbose = 1;
539 if ((env = getenv("hw.acpi.verbose")) != NULL) {
540 if (strcmp(env, "") != 0)
541 sc->acpi_verbose = 1;
542 freeenv(env);
543 }
544
545 /* Only enable S4BIOS by default if the FACS says it is available. */
546 if (AcpiGbl_FACS->S4Bios_f != 0)
547 sc->acpi_s4bios = 1;
548
549 /*
550 * Dispatch the default sleep state to devices. The lid switch is set
551 * to NONE by default to avoid surprising users.
552 */
553 sc->acpi_power_button_sx = ACPI_STATE_S5;
554 sc->acpi_lid_switch_sx = ACPI_S_STATES_MAX + 1;
555 sc->acpi_standby_sx = ACPI_STATE_S1;
556 sc->acpi_suspend_sx = ACPI_STATE_S3;
557
558 /* Pick the first valid sleep state for the sleep button default. */
559 sc->acpi_sleep_button_sx = ACPI_S_STATES_MAX + 1;
560 for (state = ACPI_STATE_S1; state < ACPI_STATE_S5; state++)
561 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB))) {
562 sc->acpi_sleep_button_sx = state;
563 break;
564 }
565
566 acpi_enable_fixed_events(sc);
567
568 /*
569 * Scan the namespace and attach/initialise children.
570 */
571
572 /* Register our shutdown handler. */
573 EVENTHANDLER_REGISTER(shutdown_final, acpi_shutdown_final, sc,
574 SHUTDOWN_PRI_LAST);
575
576 /*
577 * Register our acpi event handlers.
578 * XXX should be configurable eg. via userland policy manager.
579 */
580 EVENTHANDLER_REGISTER(acpi_sleep_event, acpi_system_eventhandler_sleep,
581 sc, ACPI_EVENT_PRI_LAST);
582 EVENTHANDLER_REGISTER(acpi_wakeup_event, acpi_system_eventhandler_wakeup,
583 sc, ACPI_EVENT_PRI_LAST);
584
585 /* Flag our initial states. */
586 sc->acpi_enabled = 1;
587 sc->acpi_sstate = ACPI_STATE_S0;
588 sc->acpi_sleep_disabled = 0;
589
590 /* Create the control device */
591 sc->acpi_dev_t = make_dev(&acpi_cdevsw, 0, UID_ROOT, GID_WHEEL, 0644,
592 "acpi");
593 sc->acpi_dev_t->si_drv1 = sc;
594
595 if ((error = acpi_machdep_init(dev)))
596 goto out;
597
598 /* Register ACPI again to pass the correct argument of pm_func. */
599 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, sc);
600
601 if (!acpi_disabled("bus"))
602 acpi_probe_children(dev);
603
604 error = 0;
605
606 out:
607 return_VALUE (error);
608 }
609
610 static int
611 acpi_suspend(device_t dev)
612 {
613 device_t child, *devlist;
614 int error, i, numdevs, pstate;
615
616 GIANT_REQUIRED;
617
618 /* First give child devices a chance to suspend. */
619 error = bus_generic_suspend(dev);
620 if (error)
621 return (error);
622
623 /*
624 * Now, set them into the appropriate power state, usually D3. If the
625 * device has an _SxD method for the next sleep state, use that power
626 * state instead.
627 */
628 device_get_children(dev, &devlist, &numdevs);
629 for (i = 0; i < numdevs; i++) {
630 /* If the device is not attached, we've powered it down elsewhere. */
631 child = devlist[i];
632 if (!device_is_attached(child))
633 continue;
634
635 /*
636 * Default to D3 for all sleep states. The _SxD method is optional
637 * so set the powerstate even if it's absent.
638 */
639 pstate = PCI_POWERSTATE_D3;
640 error = acpi_device_pwr_for_sleep(device_get_parent(child),
641 child, &pstate);
642 if ((error == 0 || error == ESRCH) && acpi_do_powerstate)
643 pci_set_powerstate(child, pstate);
644 }
645 free(devlist, M_TEMP);
646 error = 0;
647
648 return (error);
649 }
650
651 static int
652 acpi_resume(device_t dev)
653 {
654 ACPI_HANDLE handle;
655 int i, numdevs;
656 device_t child, *devlist;
657
658 GIANT_REQUIRED;
659
660 /*
661 * Put all devices in D0 before resuming them. Call _S0D on each one
662 * since some systems expect this.
663 */
664 device_get_children(dev, &devlist, &numdevs);
665 for (i = 0; i < numdevs; i++) {
666 child = devlist[i];
667 handle = acpi_get_handle(child);
668 if (handle)
669 AcpiEvaluateObject(handle, "_S0D", NULL, NULL);
670 if (device_is_attached(child) && acpi_do_powerstate)
671 pci_set_powerstate(child, PCI_POWERSTATE_D0);
672 }
673 free(devlist, M_TEMP);
674
675 return (bus_generic_resume(dev));
676 }
677
678 static int
679 acpi_shutdown(device_t dev)
680 {
681
682 GIANT_REQUIRED;
683
684 /* Allow children to shutdown first. */
685 bus_generic_shutdown(dev);
686
687 /*
688 * Enable any GPEs that are able to power-on the system (i.e., RTC).
689 * Also, disable any that are not valid for this state (most).
690 */
691 acpi_wake_prep_walk(ACPI_STATE_S5);
692
693 return (0);
694 }
695
696 /*
697 * Handle a new device being added
698 */
699 static device_t
700 acpi_add_child(device_t bus, int order, const char *name, int unit)
701 {
702 struct acpi_device *ad;
703 device_t child;
704
705 if ((ad = malloc(sizeof(*ad), M_ACPIDEV, M_NOWAIT | M_ZERO)) == NULL)
706 return (NULL);
707
708 resource_list_init(&ad->ad_rl);
709
710 child = device_add_child_ordered(bus, order, name, unit);
711 if (child != NULL)
712 device_set_ivars(child, ad);
713 else
714 free(ad, M_ACPIDEV);
715 return (child);
716 }
717
718 static int
719 acpi_print_child(device_t bus, device_t child)
720 {
721 struct acpi_device *adev = device_get_ivars(child);
722 struct resource_list *rl = &adev->ad_rl;
723 int retval = 0;
724
725 retval += bus_print_child_header(bus, child);
726 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#lx");
727 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#lx");
728 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
729 retval += resource_list_print_type(rl, "drq", SYS_RES_DRQ, "%ld");
730 if (device_get_flags(child))
731 retval += printf(" flags %#x", device_get_flags(child));
732 retval += bus_print_child_footer(bus, child);
733
734 return (retval);
735 }
736
737 /*
738 * If this device is an ACPI child but no one claimed it, attempt
739 * to power it off. We'll power it back up when a driver is added.
740 *
741 * XXX Disabled for now since many necessary devices (like fdc and
742 * ATA) don't claim the devices we created for them but still expect
743 * them to be powered up.
744 */
745 static void
746 acpi_probe_nomatch(device_t bus, device_t child)
747 {
748
749 /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
750 }
751
752 /*
753 * If a new driver has a chance to probe a child, first power it up.
754 *
755 * XXX Disabled for now (see acpi_probe_nomatch for details).
756 */
757 static void
758 acpi_driver_added(device_t dev, driver_t *driver)
759 {
760 device_t child, *devlist;
761 int i, numdevs;
762
763 DEVICE_IDENTIFY(driver, dev);
764 device_get_children(dev, &devlist, &numdevs);
765 for (i = 0; i < numdevs; i++) {
766 child = devlist[i];
767 if (device_get_state(child) == DS_NOTPRESENT) {
768 /* pci_set_powerstate(child, PCI_POWERSTATE_D0); */
769 if (device_probe_and_attach(child) != 0)
770 ; /* pci_set_powerstate(child, PCI_POWERSTATE_D3); */
771 }
772 }
773 free(devlist, M_TEMP);
774 }
775
776 /* Location hint for devctl(8) */
777 static int
778 acpi_child_location_str_method(device_t cbdev, device_t child, char *buf,
779 size_t buflen)
780 {
781 struct acpi_device *dinfo = device_get_ivars(child);
782
783 if (dinfo->ad_handle)
784 snprintf(buf, buflen, "handle=%s", acpi_name(dinfo->ad_handle));
785 else
786 snprintf(buf, buflen, "unknown");
787 return (0);
788 }
789
790 /* PnP information for devctl(8) */
791 static int
792 acpi_child_pnpinfo_str_method(device_t cbdev, device_t child, char *buf,
793 size_t buflen)
794 {
795 ACPI_BUFFER adbuf = {ACPI_ALLOCATE_BUFFER, NULL};
796 ACPI_DEVICE_INFO *adinfo;
797 struct acpi_device *dinfo = device_get_ivars(child);
798 char *end;
799 int error;
800
801 error = AcpiGetObjectInfo(dinfo->ad_handle, &adbuf);
802 adinfo = (ACPI_DEVICE_INFO *) adbuf.Pointer;
803 if (error)
804 snprintf(buf, buflen, "unknown");
805 else
806 snprintf(buf, buflen, "_HID=%s _UID=%lu",
807 (adinfo->Valid & ACPI_VALID_HID) ?
808 adinfo->HardwareId.Value : "none",
809 (adinfo->Valid & ACPI_VALID_UID) ?
810 strtoul(adinfo->UniqueId.Value, &end, 10) : 0);
811 if (adinfo)
812 AcpiOsFree(adinfo);
813
814 return (0);
815 }
816
817 /*
818 * Handle per-device ivars
819 */
820 static int
821 acpi_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
822 {
823 struct acpi_device *ad;
824
825 if ((ad = device_get_ivars(child)) == NULL) {
826 printf("device has no ivars\n");
827 return (ENOENT);
828 }
829
830 /* ACPI and ISA compatibility ivars */
831 switch(index) {
832 case ACPI_IVAR_HANDLE:
833 *(ACPI_HANDLE *)result = ad->ad_handle;
834 break;
835 case ACPI_IVAR_MAGIC:
836 *(int *)result = ad->ad_magic;
837 break;
838 case ACPI_IVAR_PRIVATE:
839 *(void **)result = ad->ad_private;
840 break;
841 case ACPI_IVAR_FLAGS:
842 *(int *)result = ad->ad_flags;
843 break;
844 case ISA_IVAR_VENDORID:
845 case ISA_IVAR_SERIAL:
846 case ISA_IVAR_COMPATID:
847 *(int *)result = -1;
848 break;
849 case ISA_IVAR_LOGICALID:
850 *(int *)result = acpi_isa_get_logicalid(child);
851 break;
852 default:
853 return (ENOENT);
854 }
855
856 return (0);
857 }
858
859 static int
860 acpi_write_ivar(device_t dev, device_t child, int index, uintptr_t value)
861 {
862 struct acpi_device *ad;
863
864 if ((ad = device_get_ivars(child)) == NULL) {
865 printf("device has no ivars\n");
866 return (ENOENT);
867 }
868
869 switch(index) {
870 case ACPI_IVAR_HANDLE:
871 ad->ad_handle = (ACPI_HANDLE)value;
872 break;
873 case ACPI_IVAR_MAGIC:
874 ad->ad_magic = (int)value;
875 break;
876 case ACPI_IVAR_PRIVATE:
877 ad->ad_private = (void *)value;
878 break;
879 case ACPI_IVAR_FLAGS:
880 ad->ad_flags = (int)value;
881 break;
882 default:
883 panic("bad ivar write request (%d)", index);
884 return (ENOENT);
885 }
886
887 return (0);
888 }
889
890 /*
891 * Handle child resource allocation/removal
892 */
893 static struct resource_list *
894 acpi_get_rlist(device_t dev, device_t child)
895 {
896 struct acpi_device *ad;
897
898 ad = device_get_ivars(child);
899 return (&ad->ad_rl);
900 }
901
902 /*
903 * Pre-allocate/manage all memory and IO resources. Since rman can't handle
904 * duplicates, we merge any in the sysresource attach routine.
905 */
906 static int
907 acpi_sysres_alloc(device_t dev)
908 {
909 struct resource *res;
910 struct resource_list *rl;
911 struct resource_list_entry *rle;
912 struct rman *rm;
913 char *sysres_ids[] = { "PNP0C01", "PNP0C02", NULL };
914 device_t *children;
915 int child_count, i;
916
917 /*
918 * Probe/attach any sysresource devices. This would be unnecessary if we
919 * had multi-pass probe/attach.
920 */
921 if (device_get_children(dev, &children, &child_count) != 0)
922 return (ENXIO);
923 for (i = 0; i < child_count; i++) {
924 if (ACPI_ID_PROBE(dev, children[i], sysres_ids) != NULL)
925 device_probe_and_attach(children[i]);
926 }
927 free(children, M_TEMP);
928
929 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
930 STAILQ_FOREACH(rle, rl, link) {
931 if (rle->res != NULL) {
932 device_printf(dev, "duplicate resource for %lx\n", rle->start);
933 continue;
934 }
935
936 /* Only memory and IO resources are valid here. */
937 switch (rle->type) {
938 case SYS_RES_IOPORT:
939 rm = &acpi_rman_io;
940 break;
941 case SYS_RES_MEMORY:
942 rm = &acpi_rman_mem;
943 break;
944 default:
945 continue;
946 }
947
948 /* Pre-allocate resource and add to our rman pool. */
949 res = BUS_ALLOC_RESOURCE(device_get_parent(dev), dev, rle->type,
950 &rle->rid, rle->start, rle->start + rle->count - 1, rle->count, 0);
951 if (res != NULL) {
952 rman_manage_region(rm, rman_get_start(res), rman_get_end(res));
953 rle->res = res;
954 } else
955 device_printf(dev, "reservation of %lx, %lx (%d) failed\n",
956 rle->start, rle->count, rle->type);
957 }
958 return (0);
959 }
960
961 /* Find if we manage a given resource. */
962 static struct resource_list_entry *
963 acpi_sysres_find(device_t dev, int type, u_long addr)
964 {
965 struct resource_list *rl;
966 struct resource_list_entry *rle;
967
968 ACPI_SERIAL_ASSERT(acpi);
969
970 /* We only consider IO and memory resources for our pool. */
971 rle = NULL;
972 if (type != SYS_RES_IOPORT && type != SYS_RES_MEMORY)
973 goto out;
974
975 rl = BUS_GET_RESOURCE_LIST(device_get_parent(dev), dev);
976 STAILQ_FOREACH(rle, rl, link) {
977 if (type == rle->type && addr >= rle->start &&
978 addr < rle->start + rle->count)
979 break;
980 }
981
982 out:
983 return (rle);
984 }
985
986 static struct resource *
987 acpi_alloc_resource(device_t bus, device_t child, int type, int *rid,
988 u_long start, u_long end, u_long count, u_int flags)
989 {
990 ACPI_RESOURCE ares;
991 struct acpi_device *ad = device_get_ivars(child);
992 struct resource_list *rl = &ad->ad_rl;
993 struct resource_list_entry *rle;
994 struct resource *res;
995 struct rman *rm;
996
997 res = NULL;
998 ACPI_SERIAL_BEGIN(acpi);
999
1000 /*
1001 * If this is an allocation of the "default" range for a given RID, and
1002 * we know what the resources for this device are (i.e., they're on the
1003 * child's resource list), use those start/end values.
1004 */
1005 if (bus == device_get_parent(child) && start == 0UL && end == ~0UL) {
1006 rle = resource_list_find(rl, type, *rid);
1007 if (rle == NULL)
1008 goto out;
1009 start = rle->start;
1010 end = rle->end;
1011 count = rle->count;
1012 }
1013
1014 /* If we don't manage this address, pass the request up to the parent. */
1015 rle = acpi_sysres_find(bus, type, start);
1016 if (rle == NULL) {
1017 res = BUS_ALLOC_RESOURCE(device_get_parent(bus), child, type, rid,
1018 start, end, count, flags);
1019 } else {
1020
1021 /* We only handle memory and IO resources through rman. */
1022 switch (type) {
1023 case SYS_RES_IOPORT:
1024 rm = &acpi_rman_io;
1025 break;
1026 case SYS_RES_MEMORY:
1027 rm = &acpi_rman_mem;
1028 break;
1029 default:
1030 panic("acpi_alloc_resource: invalid res type %d", type);
1031 }
1032
1033 /* If we do know it, allocate it from the local pool. */
1034 res = rman_reserve_resource(rm, start, end, count, flags & ~RF_ACTIVE,
1035 child);
1036 if (res == NULL)
1037 goto out;
1038
1039 /* Copy the bus tag and handle from the pre-allocated resource. */
1040 rman_set_rid(res, *rid);
1041 rman_set_bustag(res, rman_get_bustag(rle->res));
1042 rman_set_bushandle(res, rman_get_start(res));
1043
1044 /* If requested, activate the resource using the parent's method. */
1045 if (flags & RF_ACTIVE)
1046 if (bus_activate_resource(child, type, *rid, res) != 0) {
1047 rman_release_resource(res);
1048 res = NULL;
1049 goto out;
1050 }
1051 }
1052
1053 if (res != NULL && device_get_parent(child) == bus)
1054 switch (type) {
1055 case SYS_RES_IRQ:
1056 /*
1057 * Since bus_config_intr() takes immediate effect, we cannot
1058 * configure the interrupt associated with a device when we
1059 * parse the resources but have to defer it until a driver
1060 * actually allocates the interrupt via bus_alloc_resource().
1061 *
1062 * XXX: Should we handle the lookup failing?
1063 */
1064 if (ACPI_SUCCESS(acpi_lookup_irq_resource(child, *rid, res, &ares)))
1065 acpi_config_intr(child, &ares);
1066 break;
1067 }
1068
1069 out:
1070 ACPI_SERIAL_END(acpi);
1071 return (res);
1072 }
1073
1074 static int
1075 acpi_release_resource(device_t bus, device_t child, int type, int rid,
1076 struct resource *r)
1077 {
1078 int ret;
1079
1080 ACPI_SERIAL_BEGIN(acpi);
1081
1082 /*
1083 * If we know about this address, deactivate it and release it to the
1084 * local pool. If we don't, pass this request up to the parent.
1085 */
1086 if (acpi_sysres_find(bus, type, rman_get_start(r)) != NULL) {
1087 if (rman_get_flags(r) & RF_ACTIVE) {
1088 ret = bus_deactivate_resource(child, type, rid, r);
1089 if (ret != 0)
1090 goto out;
1091 }
1092 ret = rman_release_resource(r);
1093 } else
1094 ret = BUS_RELEASE_RESOURCE(device_get_parent(bus), child, type, rid, r);
1095
1096 out:
1097 ACPI_SERIAL_END(acpi);
1098 return (ret);
1099 }
1100
1101 static void
1102 acpi_delete_resource(device_t bus, device_t child, int type, int rid)
1103 {
1104 struct resource_list *rl;
1105
1106 rl = acpi_get_rlist(bus, child);
1107 resource_list_delete(rl, type, rid);
1108 }
1109
1110 /* Allocate an IO port or memory resource, given its GAS. */
1111 int
1112 acpi_bus_alloc_gas(device_t dev, int *type, int *rid, ACPI_GENERIC_ADDRESS *gas,
1113 struct resource **res)
1114 {
1115 int error, res_type;
1116
1117 error = ENOMEM;
1118 if (type == NULL || rid == NULL || gas == NULL || res == NULL)
1119 return (EINVAL);
1120
1121 /* We only support memory and IO spaces. */
1122 switch (gas->AddressSpaceId) {
1123 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1124 res_type = SYS_RES_MEMORY;
1125 break;
1126 case ACPI_ADR_SPACE_SYSTEM_IO:
1127 res_type = SYS_RES_IOPORT;
1128 break;
1129 default:
1130 return (EOPNOTSUPP);
1131 }
1132
1133 /*
1134 * If the register width is less than 8, assume the BIOS author means
1135 * it is a bit field and just allocate a byte.
1136 */
1137 if (gas->RegisterBitWidth && gas->RegisterBitWidth < 8)
1138 gas->RegisterBitWidth = 8;
1139
1140 /* Validate the address after we're sure we support the space. */
1141 if (!ACPI_VALID_ADDRESS(gas->Address) || gas->RegisterBitWidth == 0)
1142 return (EINVAL);
1143
1144 bus_set_resource(dev, res_type, *rid, gas->Address,
1145 gas->RegisterBitWidth / 8);
1146 *res = bus_alloc_resource_any(dev, res_type, rid, RF_ACTIVE);
1147 if (*res != NULL) {
1148 *type = res_type;
1149 error = 0;
1150 } else
1151 bus_delete_resource(dev, res_type, *rid);
1152
1153 return (error);
1154 }
1155
1156 /* Probe _HID and _CID for compatible ISA PNP ids. */
1157 static uint32_t
1158 acpi_isa_get_logicalid(device_t dev)
1159 {
1160 ACPI_DEVICE_INFO *devinfo;
1161 ACPI_BUFFER buf;
1162 ACPI_HANDLE h;
1163 ACPI_STATUS error;
1164 u_int32_t pnpid;
1165
1166 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1167
1168 pnpid = 0;
1169 buf.Pointer = NULL;
1170 buf.Length = ACPI_ALLOCATE_BUFFER;
1171
1172 /* Fetch and validate the HID. */
1173 if ((h = acpi_get_handle(dev)) == NULL)
1174 goto out;
1175 error = AcpiGetObjectInfo(h, &buf);
1176 if (ACPI_FAILURE(error))
1177 goto out;
1178 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1179
1180 if ((devinfo->Valid & ACPI_VALID_HID) != 0)
1181 pnpid = PNP_EISAID(devinfo->HardwareId.Value);
1182
1183 out:
1184 if (buf.Pointer != NULL)
1185 AcpiOsFree(buf.Pointer);
1186 return_VALUE (pnpid);
1187 }
1188
1189 static int
1190 acpi_isa_get_compatid(device_t dev, uint32_t *cids, int count)
1191 {
1192 ACPI_DEVICE_INFO *devinfo;
1193 ACPI_BUFFER buf;
1194 ACPI_HANDLE h;
1195 ACPI_STATUS error;
1196 uint32_t *pnpid;
1197 int valid, i;
1198
1199 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1200
1201 pnpid = cids;
1202 valid = 0;
1203 buf.Pointer = NULL;
1204 buf.Length = ACPI_ALLOCATE_BUFFER;
1205
1206 /* Fetch and validate the CID */
1207 if ((h = acpi_get_handle(dev)) == NULL)
1208 goto out;
1209 error = AcpiGetObjectInfo(h, &buf);
1210 if (ACPI_FAILURE(error))
1211 goto out;
1212 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1213 if ((devinfo->Valid & ACPI_VALID_CID) == 0)
1214 goto out;
1215
1216 if (devinfo->CompatibilityId.Count < count)
1217 count = devinfo->CompatibilityId.Count;
1218 for (i = 0; i < count; i++) {
1219 if (strncmp(devinfo->CompatibilityId.Id[i].Value, "PNP", 3) != 0)
1220 continue;
1221 *pnpid++ = PNP_EISAID(devinfo->CompatibilityId.Id[i].Value);
1222 valid++;
1223 }
1224
1225 out:
1226 if (buf.Pointer != NULL)
1227 AcpiOsFree(buf.Pointer);
1228 return_VALUE (valid);
1229 }
1230
1231 static char *
1232 acpi_device_id_probe(device_t bus, device_t dev, char **ids)
1233 {
1234 ACPI_HANDLE h;
1235 int i;
1236
1237 h = acpi_get_handle(dev);
1238 if (ids == NULL || h == NULL || acpi_get_type(dev) != ACPI_TYPE_DEVICE)
1239 return (NULL);
1240
1241 /* Try to match one of the array of IDs with a HID or CID. */
1242 for (i = 0; ids[i] != NULL; i++) {
1243 if (acpi_MatchHid(h, ids[i]))
1244 return (ids[i]);
1245 }
1246 return (NULL);
1247 }
1248
1249 static ACPI_STATUS
1250 acpi_device_eval_obj(device_t bus, device_t dev, ACPI_STRING pathname,
1251 ACPI_OBJECT_LIST *parameters, ACPI_BUFFER *ret)
1252 {
1253 ACPI_HANDLE h;
1254
1255 if (dev == NULL)
1256 h = ACPI_ROOT_OBJECT;
1257 else if ((h = acpi_get_handle(dev)) == NULL)
1258 return (AE_BAD_PARAMETER);
1259 return (AcpiEvaluateObject(h, pathname, parameters, ret));
1260 }
1261
1262 static int
1263 acpi_device_pwr_for_sleep(device_t bus, device_t dev, int *dstate)
1264 {
1265 struct acpi_softc *sc;
1266 ACPI_HANDLE handle;
1267 ACPI_STATUS status;
1268 char sxd[8];
1269 int error;
1270
1271 sc = device_get_softc(bus);
1272 handle = acpi_get_handle(dev);
1273
1274 /*
1275 * XXX If we find these devices, don't try to power them down.
1276 * The serial and IRDA ports on my T23 hang the system when
1277 * set to D3 and it appears that such legacy devices may
1278 * need special handling in their drivers.
1279 */
1280 if (handle == NULL ||
1281 acpi_MatchHid(handle, "PNP0500") ||
1282 acpi_MatchHid(handle, "PNP0501") ||
1283 acpi_MatchHid(handle, "PNP0502") ||
1284 acpi_MatchHid(handle, "PNP0510") ||
1285 acpi_MatchHid(handle, "PNP0511"))
1286 return (ENXIO);
1287
1288 /*
1289 * Override next state with the value from _SxD, if present. If no
1290 * dstate argument was provided, don't fetch the return value.
1291 */
1292 snprintf(sxd, sizeof(sxd), "_S%dD", sc->acpi_sstate);
1293 if (dstate)
1294 status = acpi_GetInteger(handle, sxd, dstate);
1295 else
1296 status = AcpiEvaluateObject(handle, sxd, NULL, NULL);
1297
1298 switch (status) {
1299 case AE_OK:
1300 error = 0;
1301 break;
1302 case AE_NOT_FOUND:
1303 error = ESRCH;
1304 break;
1305 default:
1306 error = ENXIO;
1307 break;
1308 }
1309
1310 return (error);
1311 }
1312
1313 /* Callback arg for our implementation of walking the namespace. */
1314 struct acpi_device_scan_ctx {
1315 acpi_scan_cb_t user_fn;
1316 void *arg;
1317 ACPI_HANDLE parent;
1318 };
1319
1320 static ACPI_STATUS
1321 acpi_device_scan_cb(ACPI_HANDLE h, UINT32 level, void *arg, void **retval)
1322 {
1323 struct acpi_device_scan_ctx *ctx;
1324 device_t dev, old_dev;
1325 ACPI_STATUS status;
1326 ACPI_OBJECT_TYPE type;
1327
1328 /*
1329 * Skip this device if we think we'll have trouble with it or it is
1330 * the parent where the scan began.
1331 */
1332 ctx = (struct acpi_device_scan_ctx *)arg;
1333 if (acpi_avoid(h) || h == ctx->parent)
1334 return (AE_OK);
1335
1336 /* If this is not a valid device type (e.g., a method), skip it. */
1337 if (ACPI_FAILURE(AcpiGetType(h, &type)))
1338 return (AE_OK);
1339 if (type != ACPI_TYPE_DEVICE && type != ACPI_TYPE_PROCESSOR &&
1340 type != ACPI_TYPE_THERMAL && type != ACPI_TYPE_POWER)
1341 return (AE_OK);
1342
1343 /*
1344 * Call the user function with the current device. If it is unchanged
1345 * afterwards, return. Otherwise, we update the handle to the new dev.
1346 */
1347 old_dev = acpi_get_device(h);
1348 dev = old_dev;
1349 status = ctx->user_fn(h, &dev, level, ctx->arg);
1350 if (ACPI_FAILURE(status) || old_dev == dev)
1351 return (status);
1352
1353 /* Remove the old child and its connection to the handle. */
1354 if (old_dev != NULL) {
1355 device_delete_child(device_get_parent(old_dev), old_dev);
1356 AcpiDetachData(h, acpi_fake_objhandler);
1357 }
1358
1359 /* Recreate the handle association if the user created a device. */
1360 if (dev != NULL)
1361 AcpiAttachData(h, acpi_fake_objhandler, dev);
1362
1363 return (AE_OK);
1364 }
1365
1366 static ACPI_STATUS
1367 acpi_device_scan_children(device_t bus, device_t dev, int max_depth,
1368 acpi_scan_cb_t user_fn, void *arg)
1369 {
1370 ACPI_HANDLE h;
1371 struct acpi_device_scan_ctx ctx;
1372
1373 if (acpi_disabled("children"))
1374 return (AE_OK);
1375
1376 if (dev == NULL)
1377 h = ACPI_ROOT_OBJECT;
1378 else if ((h = acpi_get_handle(dev)) == NULL)
1379 return (AE_BAD_PARAMETER);
1380 ctx.user_fn = user_fn;
1381 ctx.arg = arg;
1382 ctx.parent = h;
1383 return (AcpiWalkNamespace(ACPI_TYPE_ANY, h, max_depth,
1384 acpi_device_scan_cb, &ctx, NULL));
1385 }
1386
1387 /*
1388 * Even though ACPI devices are not PCI, we use the PCI approach for setting
1389 * device power states since it's close enough to ACPI.
1390 */
1391 static int
1392 acpi_set_powerstate_method(device_t bus, device_t child, int state)
1393 {
1394 ACPI_HANDLE h;
1395 ACPI_STATUS status;
1396 int error;
1397
1398 error = 0;
1399 h = acpi_get_handle(child);
1400 if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
1401 return (EINVAL);
1402 if (h == NULL)
1403 return (0);
1404
1405 /* Ignore errors if the power methods aren't present. */
1406 status = acpi_pwr_switch_consumer(h, state);
1407 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND
1408 && status != AE_BAD_PARAMETER)
1409 device_printf(bus, "failed to set ACPI power state D%d on %s: %s\n",
1410 state, acpi_name(h), AcpiFormatException(status));
1411
1412 return (error);
1413 }
1414
1415 static int
1416 acpi_isa_pnp_probe(device_t bus, device_t child, struct isa_pnp_id *ids)
1417 {
1418 int result, cid_count, i;
1419 uint32_t lid, cids[8];
1420
1421 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1422
1423 /*
1424 * ISA-style drivers attached to ACPI may persist and
1425 * probe manually if we return ENOENT. We never want
1426 * that to happen, so don't ever return it.
1427 */
1428 result = ENXIO;
1429
1430 /* Scan the supplied IDs for a match */
1431 lid = acpi_isa_get_logicalid(child);
1432 cid_count = acpi_isa_get_compatid(child, cids, 8);
1433 while (ids && ids->ip_id) {
1434 if (lid == ids->ip_id) {
1435 result = 0;
1436 goto out;
1437 }
1438 for (i = 0; i < cid_count; i++) {
1439 if (cids[i] == ids->ip_id) {
1440 result = 0;
1441 goto out;
1442 }
1443 }
1444 ids++;
1445 }
1446
1447 out:
1448 if (result == 0 && ids->ip_desc)
1449 device_set_desc(child, ids->ip_desc);
1450
1451 return_VALUE (result);
1452 }
1453
1454 /*
1455 * Scan all of the ACPI namespace and attach child devices.
1456 *
1457 * We should only expect to find devices in the \_PR, \_TZ, \_SI, and
1458 * \_SB scopes, and \_PR and \_TZ became obsolete in the ACPI 2.0 spec.
1459 * However, in violation of the spec, some systems place their PCI link
1460 * devices in \, so we have to walk the whole namespace. We check the
1461 * type of namespace nodes, so this should be ok.
1462 */
1463 static void
1464 acpi_probe_children(device_t bus)
1465 {
1466
1467 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1468
1469 /*
1470 * Scan the namespace and insert placeholders for all the devices that
1471 * we find. We also probe/attach any early devices.
1472 *
1473 * Note that we use AcpiWalkNamespace rather than AcpiGetDevices because
1474 * we want to create nodes for all devices, not just those that are
1475 * currently present. (This assumes that we don't want to create/remove
1476 * devices as they appear, which might be smarter.)
1477 */
1478 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "namespace scan\n"));
1479 AcpiWalkNamespace(ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 100, acpi_probe_child,
1480 bus, NULL);
1481
1482 /* Pre-allocate resources for our rman from any sysresource devices. */
1483 acpi_sysres_alloc(bus);
1484
1485 /* Create any static children by calling device identify methods. */
1486 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "device identify routines\n"));
1487 bus_generic_probe(bus);
1488
1489 /* Probe/attach all children, created staticly and from the namespace. */
1490 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "first bus_generic_attach\n"));
1491 bus_generic_attach(bus);
1492
1493 /*
1494 * Some of these children may have attached others as part of their attach
1495 * process (eg. the root PCI bus driver), so rescan.
1496 */
1497 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "second bus_generic_attach\n"));
1498 bus_generic_attach(bus);
1499
1500 /* Attach wake sysctls. */
1501 acpi_wake_sysctl_walk(bus);
1502
1503 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "done attaching children\n"));
1504 return_VOID;
1505 }
1506
1507 /*
1508 * Determine the probe order for a given device and return non-zero if it
1509 * should be attached immediately.
1510 */
1511 static int
1512 acpi_probe_order(ACPI_HANDLE handle, int *order)
1513 {
1514
1515 /*
1516 * 1. I/O port and memory system resource holders
1517 * 2. Embedded controllers (to handle early accesses)
1518 * 3. PCI Link Devices
1519 */
1520 if (acpi_MatchHid(handle, "PNP0C01") || acpi_MatchHid(handle, "PNP0C02"))
1521 *order = 1;
1522 else if (acpi_MatchHid(handle, "PNP0C09"))
1523 *order = 2;
1524 else if (acpi_MatchHid(handle, "PNP0C0F"))
1525 *order = 3;
1526 return (0);
1527 }
1528
1529 /*
1530 * Evaluate a child device and determine whether we might attach a device to
1531 * it.
1532 */
1533 static ACPI_STATUS
1534 acpi_probe_child(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
1535 {
1536 ACPI_OBJECT_TYPE type;
1537 ACPI_HANDLE h;
1538 device_t bus, child;
1539 int order;
1540 char *handle_str, **search;
1541 static char *scopes[] = {"\\_PR_", "\\_TZ_", "\\_SI_", "\\_SB_", NULL};
1542
1543 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
1544
1545 /* Skip this device if we think we'll have trouble with it. */
1546 if (acpi_avoid(handle))
1547 return_ACPI_STATUS (AE_OK);
1548
1549 bus = (device_t)context;
1550 if (ACPI_SUCCESS(AcpiGetType(handle, &type))) {
1551 switch (type) {
1552 case ACPI_TYPE_DEVICE:
1553 case ACPI_TYPE_PROCESSOR:
1554 case ACPI_TYPE_THERMAL:
1555 case ACPI_TYPE_POWER:
1556 if (acpi_disabled("children"))
1557 break;
1558
1559 /*
1560 * Since we scan from \, be sure to skip system scope objects.
1561 * At least \_SB and \_TZ are detected as devices (ACPI-CA bug?)
1562 */
1563 handle_str = acpi_name(handle);
1564 for (search = scopes; *search != NULL; search++) {
1565 if (strcmp(handle_str, *search) == 0)
1566 break;
1567 }
1568 if (*search != NULL)
1569 break;
1570
1571 /*
1572 * Create a placeholder device for this node. Sort the placeholder
1573 * so that the probe/attach passes will run breadth-first. Orders
1574 * less than 10 are reserved for special objects (i.e., system
1575 * resources). Larger values are used for all other devices.
1576 */
1577 ACPI_DEBUG_PRINT((ACPI_DB_OBJECTS, "scanning '%s'\n", handle_str));
1578 order = (level + 1) * 10;
1579 acpi_probe_order(handle, &order);
1580 child = BUS_ADD_CHILD(bus, order, NULL, -1);
1581 if (child == NULL)
1582 break;
1583
1584 /* Associate the handle with the device_t and vice versa. */
1585 acpi_set_handle(child, handle);
1586 AcpiAttachData(handle, acpi_fake_objhandler, child);
1587
1588 /*
1589 * Check that the device is present. If it's not present,
1590 * leave it disabled (so that we have a device_t attached to
1591 * the handle, but we don't probe it).
1592 *
1593 * XXX PCI link devices sometimes report "present" but not
1594 * "functional" (i.e. if disabled). Go ahead and probe them
1595 * anyway since we may enable them later.
1596 */
1597 if (type == ACPI_TYPE_DEVICE && !acpi_DeviceIsPresent(child)) {
1598 /* Never disable PCI link devices. */
1599 if (acpi_MatchHid(handle, "PNP0C0F"))
1600 break;
1601 /*
1602 * Docking stations should remain enabled since the system
1603 * may be undocked at boot.
1604 */
1605 if (ACPI_SUCCESS(AcpiGetHandle(handle, "_DCK", &h)))
1606 break;
1607
1608 device_disable(child);
1609 break;
1610 }
1611
1612 /*
1613 * Get the device's resource settings and attach them.
1614 * Note that if the device has _PRS but no _CRS, we need
1615 * to decide when it's appropriate to try to configure the
1616 * device. Ignore the return value here; it's OK for the
1617 * device not to have any resources.
1618 */
1619 acpi_parse_resources(child, handle, &acpi_res_parse_set, NULL);
1620 break;
1621 }
1622 }
1623
1624 return_ACPI_STATUS (AE_OK);
1625 }
1626
1627 /*
1628 * AcpiAttachData() requires an object handler but never uses it. This is a
1629 * placeholder object handler so we can store a device_t in an ACPI_HANDLE.
1630 */
1631 void
1632 acpi_fake_objhandler(ACPI_HANDLE h, UINT32 fn, void *data)
1633 {
1634 }
1635
1636 static void
1637 acpi_shutdown_final(void *arg, int howto)
1638 {
1639 struct acpi_softc *sc;
1640 ACPI_STATUS status;
1641
1642 /*
1643 * XXX Shutdown code should only run on the BSP (cpuid 0).
1644 * Some chipsets do not power off the system correctly if called from
1645 * an AP.
1646 */
1647 sc = arg;
1648 if ((howto & RB_POWEROFF) != 0) {
1649 status = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
1650 if (ACPI_FAILURE(status)) {
1651 printf("AcpiEnterSleepStatePrep failed - %s\n",
1652 AcpiFormatException(status));
1653 return;
1654 }
1655 printf("Powering system off using ACPI\n");
1656 ACPI_DISABLE_IRQS();
1657 status = AcpiEnterSleepState(ACPI_STATE_S5);
1658 if (ACPI_FAILURE(status)) {
1659 printf("ACPI power-off failed - %s\n", AcpiFormatException(status));
1660 } else {
1661 DELAY(1000000);
1662 printf("ACPI power-off failed - timeout\n");
1663 }
1664 } else if ((howto & RB_HALT) == 0 && AcpiGbl_FADT->ResetRegSup &&
1665 sc->acpi_handle_reboot) {
1666 /* Reboot using the reset register. */
1667 status = AcpiHwLowLevelWrite(
1668 AcpiGbl_FADT->ResetRegister.RegisterBitWidth,
1669 AcpiGbl_FADT->ResetValue, &AcpiGbl_FADT->ResetRegister);
1670 if (ACPI_FAILURE(status)) {
1671 printf("ACPI reset failed - %s\n", AcpiFormatException(status));
1672 } else {
1673 DELAY(1000000);
1674 printf("ACPI reset failed - timeout\n");
1675 }
1676 } else if (sc->acpi_do_disable && panicstr == NULL) {
1677 /*
1678 * Only disable ACPI if the user requested. On some systems, writing
1679 * the disable value to SMI_CMD hangs the system.
1680 */
1681 printf("Shutting down ACPI\n");
1682 AcpiTerminate();
1683 }
1684 }
1685
1686 static void
1687 acpi_enable_fixed_events(struct acpi_softc *sc)
1688 {
1689 static int first_time = 1;
1690
1691 /* Enable and clear fixed events and install handlers. */
1692 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->PwrButton == 0) {
1693 AcpiClearEvent(ACPI_EVENT_POWER_BUTTON);
1694 AcpiInstallFixedEventHandler(ACPI_EVENT_POWER_BUTTON,
1695 acpi_event_power_button_sleep, sc);
1696 if (first_time)
1697 device_printf(sc->acpi_dev, "Power Button (fixed)\n");
1698 }
1699 if (AcpiGbl_FADT != NULL && AcpiGbl_FADT->SleepButton == 0) {
1700 AcpiClearEvent(ACPI_EVENT_SLEEP_BUTTON);
1701 AcpiInstallFixedEventHandler(ACPI_EVENT_SLEEP_BUTTON,
1702 acpi_event_sleep_button_sleep, sc);
1703 if (first_time)
1704 device_printf(sc->acpi_dev, "Sleep Button (fixed)\n");
1705 }
1706
1707 first_time = 0;
1708 }
1709
1710 /*
1711 * Returns true if the device is actually present and should
1712 * be attached to. This requires the present, enabled, UI-visible
1713 * and diagnostics-passed bits to be set.
1714 */
1715 BOOLEAN
1716 acpi_DeviceIsPresent(device_t dev)
1717 {
1718 ACPI_DEVICE_INFO *devinfo;
1719 ACPI_HANDLE h;
1720 ACPI_BUFFER buf;
1721 ACPI_STATUS error;
1722 int ret;
1723
1724 ret = FALSE;
1725 if ((h = acpi_get_handle(dev)) == NULL)
1726 return (FALSE);
1727 buf.Pointer = NULL;
1728 buf.Length = ACPI_ALLOCATE_BUFFER;
1729 error = AcpiGetObjectInfo(h, &buf);
1730 if (ACPI_FAILURE(error))
1731 return (FALSE);
1732 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1733
1734 /* If no _STA method, must be present */
1735 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1736 ret = TRUE;
1737
1738 /* Return true for 'present' and 'functioning' */
1739 if (ACPI_DEVICE_PRESENT(devinfo->CurrentStatus))
1740 ret = TRUE;
1741
1742 AcpiOsFree(buf.Pointer);
1743 return (ret);
1744 }
1745
1746 /*
1747 * Returns true if the battery is actually present and inserted.
1748 */
1749 BOOLEAN
1750 acpi_BatteryIsPresent(device_t dev)
1751 {
1752 ACPI_DEVICE_INFO *devinfo;
1753 ACPI_HANDLE h;
1754 ACPI_BUFFER buf;
1755 ACPI_STATUS error;
1756 int ret;
1757
1758 ret = FALSE;
1759 if ((h = acpi_get_handle(dev)) == NULL)
1760 return (FALSE);
1761 buf.Pointer = NULL;
1762 buf.Length = ACPI_ALLOCATE_BUFFER;
1763 error = AcpiGetObjectInfo(h, &buf);
1764 if (ACPI_FAILURE(error))
1765 return (FALSE);
1766 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1767
1768 /* If no _STA method, must be present */
1769 if ((devinfo->Valid & ACPI_VALID_STA) == 0)
1770 ret = TRUE;
1771
1772 /* Return true for 'present', 'battery present', and 'functioning' */
1773 if (ACPI_BATTERY_PRESENT(devinfo->CurrentStatus))
1774 ret = TRUE;
1775
1776 AcpiOsFree(buf.Pointer);
1777 return (ret);
1778 }
1779
1780 /*
1781 * Match a HID string against a handle
1782 */
1783 static BOOLEAN
1784 acpi_MatchHid(ACPI_HANDLE h, const char *hid)
1785 {
1786 ACPI_DEVICE_INFO *devinfo;
1787 ACPI_BUFFER buf;
1788 ACPI_STATUS error;
1789 int ret, i;
1790
1791 ret = FALSE;
1792 if (hid == NULL || h == NULL)
1793 return (ret);
1794 buf.Pointer = NULL;
1795 buf.Length = ACPI_ALLOCATE_BUFFER;
1796 error = AcpiGetObjectInfo(h, &buf);
1797 if (ACPI_FAILURE(error))
1798 return (ret);
1799 devinfo = (ACPI_DEVICE_INFO *)buf.Pointer;
1800
1801 if ((devinfo->Valid & ACPI_VALID_HID) != 0 &&
1802 strcmp(hid, devinfo->HardwareId.Value) == 0)
1803 ret = TRUE;
1804 else if ((devinfo->Valid & ACPI_VALID_CID) != 0) {
1805 for (i = 0; i < devinfo->CompatibilityId.Count; i++) {
1806 if (strcmp(hid, devinfo->CompatibilityId.Id[i].Value) == 0) {
1807 ret = TRUE;
1808 break;
1809 }
1810 }
1811 }
1812
1813 AcpiOsFree(buf.Pointer);
1814 return (ret);
1815 }
1816
1817 /*
1818 * Return the handle of a named object within our scope, ie. that of (parent)
1819 * or one if its parents.
1820 */
1821 ACPI_STATUS
1822 acpi_GetHandleInScope(ACPI_HANDLE parent, char *path, ACPI_HANDLE *result)
1823 {
1824 ACPI_HANDLE r;
1825 ACPI_STATUS status;
1826
1827 /* Walk back up the tree to the root */
1828 for (;;) {
1829 status = AcpiGetHandle(parent, path, &r);
1830 if (ACPI_SUCCESS(status)) {
1831 *result = r;
1832 return (AE_OK);
1833 }
1834 /* XXX Return error here? */
1835 if (status != AE_NOT_FOUND)
1836 return (AE_OK);
1837 if (ACPI_FAILURE(AcpiGetParent(parent, &r)))
1838 return (AE_NOT_FOUND);
1839 parent = r;
1840 }
1841 }
1842
1843 /* Find the difference between two PM tick counts. */
1844 uint32_t
1845 acpi_TimerDelta(uint32_t end, uint32_t start)
1846 {
1847 uint32_t delta;
1848
1849 if (end >= start)
1850 delta = end - start;
1851 else if (AcpiGbl_FADT->TmrValExt == 0)
1852 delta = ((0x00FFFFFF - start) + end + 1) & 0x00FFFFFF;
1853 else
1854 delta = ((0xFFFFFFFF - start) + end + 1);
1855 return (delta);
1856 }
1857
1858 /*
1859 * Allocate a buffer with a preset data size.
1860 */
1861 ACPI_BUFFER *
1862 acpi_AllocBuffer(int size)
1863 {
1864 ACPI_BUFFER *buf;
1865
1866 if ((buf = malloc(size + sizeof(*buf), M_ACPIDEV, M_NOWAIT)) == NULL)
1867 return (NULL);
1868 buf->Length = size;
1869 buf->Pointer = (void *)(buf + 1);
1870 return (buf);
1871 }
1872
1873 ACPI_STATUS
1874 acpi_SetInteger(ACPI_HANDLE handle, char *path, UINT32 number)
1875 {
1876 ACPI_OBJECT arg1;
1877 ACPI_OBJECT_LIST args;
1878
1879 arg1.Type = ACPI_TYPE_INTEGER;
1880 arg1.Integer.Value = number;
1881 args.Count = 1;
1882 args.Pointer = &arg1;
1883
1884 return (AcpiEvaluateObject(handle, path, &args, NULL));
1885 }
1886
1887 /*
1888 * Evaluate a path that should return an integer.
1889 */
1890 ACPI_STATUS
1891 acpi_GetInteger(ACPI_HANDLE handle, char *path, UINT32 *number)
1892 {
1893 ACPI_STATUS status;
1894 ACPI_BUFFER buf;
1895 ACPI_OBJECT param;
1896
1897 if (handle == NULL)
1898 handle = ACPI_ROOT_OBJECT;
1899
1900 /*
1901 * Assume that what we've been pointed at is an Integer object, or
1902 * a method that will return an Integer.
1903 */
1904 buf.Pointer = ¶m;
1905 buf.Length = sizeof(param);
1906 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1907 if (ACPI_SUCCESS(status)) {
1908 if (param.Type == ACPI_TYPE_INTEGER)
1909 *number = param.Integer.Value;
1910 else
1911 status = AE_TYPE;
1912 }
1913
1914 /*
1915 * In some applications, a method that's expected to return an Integer
1916 * may instead return a Buffer (probably to simplify some internal
1917 * arithmetic). We'll try to fetch whatever it is, and if it's a Buffer,
1918 * convert it into an Integer as best we can.
1919 *
1920 * This is a hack.
1921 */
1922 if (status == AE_BUFFER_OVERFLOW) {
1923 if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL) {
1924 status = AE_NO_MEMORY;
1925 } else {
1926 status = AcpiEvaluateObject(handle, path, NULL, &buf);
1927 if (ACPI_SUCCESS(status))
1928 status = acpi_ConvertBufferToInteger(&buf, number);
1929 AcpiOsFree(buf.Pointer);
1930 }
1931 }
1932 return (status);
1933 }
1934
1935 ACPI_STATUS
1936 acpi_ConvertBufferToInteger(ACPI_BUFFER *bufp, UINT32 *number)
1937 {
1938 ACPI_OBJECT *p;
1939 UINT8 *val;
1940 int i;
1941
1942 p = (ACPI_OBJECT *)bufp->Pointer;
1943 if (p->Type == ACPI_TYPE_INTEGER) {
1944 *number = p->Integer.Value;
1945 return (AE_OK);
1946 }
1947 if (p->Type != ACPI_TYPE_BUFFER)
1948 return (AE_TYPE);
1949 if (p->Buffer.Length > sizeof(int))
1950 return (AE_BAD_DATA);
1951
1952 *number = 0;
1953 val = p->Buffer.Pointer;
1954 for (i = 0; i < p->Buffer.Length; i++)
1955 *number += val[i] << (i * 8);
1956 return (AE_OK);
1957 }
1958
1959 /*
1960 * Iterate over the elements of an a package object, calling the supplied
1961 * function for each element.
1962 *
1963 * XXX possible enhancement might be to abort traversal on error.
1964 */
1965 ACPI_STATUS
1966 acpi_ForeachPackageObject(ACPI_OBJECT *pkg,
1967 void (*func)(ACPI_OBJECT *comp, void *arg), void *arg)
1968 {
1969 ACPI_OBJECT *comp;
1970 int i;
1971
1972 if (pkg == NULL || pkg->Type != ACPI_TYPE_PACKAGE)
1973 return (AE_BAD_PARAMETER);
1974
1975 /* Iterate over components */
1976 i = 0;
1977 comp = pkg->Package.Elements;
1978 for (; i < pkg->Package.Count; i++, comp++)
1979 func(comp, arg);
1980
1981 return (AE_OK);
1982 }
1983
1984 /*
1985 * Find the (index)th resource object in a set.
1986 */
1987 ACPI_STATUS
1988 acpi_FindIndexedResource(ACPI_BUFFER *buf, int index, ACPI_RESOURCE **resp)
1989 {
1990 ACPI_RESOURCE *rp;
1991 int i;
1992
1993 rp = (ACPI_RESOURCE *)buf->Pointer;
1994 i = index;
1995 while (i-- > 0) {
1996 /* Range check */
1997 if (rp > (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
1998 return (AE_BAD_PARAMETER);
1999
2000 /* Check for terminator */
2001 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
2002 return (AE_NOT_FOUND);
2003 rp = ACPI_NEXT_RESOURCE(rp);
2004 }
2005 if (resp != NULL)
2006 *resp = rp;
2007
2008 return (AE_OK);
2009 }
2010
2011 /*
2012 * Append an ACPI_RESOURCE to an ACPI_BUFFER.
2013 *
2014 * Given a pointer to an ACPI_RESOURCE structure, expand the ACPI_BUFFER
2015 * provided to contain it. If the ACPI_BUFFER is empty, allocate a sensible
2016 * backing block. If the ACPI_RESOURCE is NULL, return an empty set of
2017 * resources.
2018 */
2019 #define ACPI_INITIAL_RESOURCE_BUFFER_SIZE 512
2020
2021 ACPI_STATUS
2022 acpi_AppendBufferResource(ACPI_BUFFER *buf, ACPI_RESOURCE *res)
2023 {
2024 ACPI_RESOURCE *rp;
2025 void *newp;
2026
2027 /* Initialise the buffer if necessary. */
2028 if (buf->Pointer == NULL) {
2029 buf->Length = ACPI_INITIAL_RESOURCE_BUFFER_SIZE;
2030 if ((buf->Pointer = AcpiOsAllocate(buf->Length)) == NULL)
2031 return (AE_NO_MEMORY);
2032 rp = (ACPI_RESOURCE *)buf->Pointer;
2033 rp->Id = ACPI_RSTYPE_END_TAG;
2034 rp->Length = 0;
2035 }
2036 if (res == NULL)
2037 return (AE_OK);
2038
2039 /*
2040 * Scan the current buffer looking for the terminator.
2041 * This will either find the terminator or hit the end
2042 * of the buffer and return an error.
2043 */
2044 rp = (ACPI_RESOURCE *)buf->Pointer;
2045 for (;;) {
2046 /* Range check, don't go outside the buffer */
2047 if (rp >= (ACPI_RESOURCE *)((u_int8_t *)buf->Pointer + buf->Length))
2048 return (AE_BAD_PARAMETER);
2049 if (rp->Id == ACPI_RSTYPE_END_TAG || rp->Length == 0)
2050 break;
2051 rp = ACPI_NEXT_RESOURCE(rp);
2052 }
2053
2054 /*
2055 * Check the size of the buffer and expand if required.
2056 *
2057 * Required size is:
2058 * size of existing resources before terminator +
2059 * size of new resource and header +
2060 * size of terminator.
2061 *
2062 * Note that this loop should really only run once, unless
2063 * for some reason we are stuffing a *really* huge resource.
2064 */
2065 while ((((u_int8_t *)rp - (u_int8_t *)buf->Pointer) +
2066 res->Length + ACPI_RESOURCE_LENGTH_NO_DATA +
2067 ACPI_RESOURCE_LENGTH) >= buf->Length) {
2068 if ((newp = AcpiOsAllocate(buf->Length * 2)) == NULL)
2069 return (AE_NO_MEMORY);
2070 bcopy(buf->Pointer, newp, buf->Length);
2071 rp = (ACPI_RESOURCE *)((u_int8_t *)newp +
2072 ((u_int8_t *)rp - (u_int8_t *)buf->Pointer));
2073 AcpiOsFree(buf->Pointer);
2074 buf->Pointer = newp;
2075 buf->Length += buf->Length;
2076 }
2077
2078 /* Insert the new resource. */
2079 bcopy(res, rp, res->Length + ACPI_RESOURCE_LENGTH_NO_DATA);
2080
2081 /* And add the terminator. */
2082 rp = ACPI_NEXT_RESOURCE(rp);
2083 rp->Id = ACPI_RSTYPE_END_TAG;
2084 rp->Length = 0;
2085
2086 return (AE_OK);
2087 }
2088
2089 /*
2090 * Set interrupt model.
2091 */
2092 ACPI_STATUS
2093 acpi_SetIntrModel(int model)
2094 {
2095
2096 return (acpi_SetInteger(ACPI_ROOT_OBJECT, "_PIC", model));
2097 }
2098
2099 static void
2100 acpi_sleep_enable(void *arg)
2101 {
2102
2103 ((struct acpi_softc *)arg)->acpi_sleep_disabled = 0;
2104 }
2105
2106 enum acpi_sleep_state {
2107 ACPI_SS_NONE,
2108 ACPI_SS_GPE_SET,
2109 ACPI_SS_DEV_SUSPEND,
2110 ACPI_SS_SLP_PREP,
2111 ACPI_SS_SLEPT,
2112 };
2113
2114 /*
2115 * Set the system sleep state
2116 *
2117 * Currently we support S1-S5 but S4 is only S4BIOS
2118 */
2119 ACPI_STATUS
2120 acpi_SetSleepState(struct acpi_softc *sc, int state)
2121 {
2122 ACPI_STATUS status;
2123 UINT8 TypeA;
2124 UINT8 TypeB;
2125 enum acpi_sleep_state slp_state;
2126
2127 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2128
2129 status = AE_OK;
2130 ACPI_LOCK(acpi);
2131 if (sc->acpi_sleep_disabled) {
2132 if (sc->acpi_sstate != ACPI_STATE_S0)
2133 status = AE_ERROR;
2134 ACPI_UNLOCK(acpi);
2135 printf("acpi: suspend request ignored (not ready yet)\n");
2136 return (status);
2137 }
2138 sc->acpi_sleep_disabled = 1;
2139 ACPI_UNLOCK(acpi);
2140
2141 /*
2142 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since non-MPSAFE
2143 * drivers need this.
2144 */
2145 mtx_lock(&Giant);
2146 slp_state = ACPI_SS_NONE;
2147 switch (state) {
2148 case ACPI_STATE_S1:
2149 case ACPI_STATE_S2:
2150 case ACPI_STATE_S3:
2151 case ACPI_STATE_S4:
2152 status = AcpiGetSleepTypeData(state, &TypeA, &TypeB);
2153 if (status == AE_NOT_FOUND) {
2154 device_printf(sc->acpi_dev,
2155 "Sleep state S%d not supported by BIOS\n", state);
2156 break;
2157 } else if (ACPI_FAILURE(status)) {
2158 device_printf(sc->acpi_dev, "AcpiGetSleepTypeData failed - %s\n",
2159 AcpiFormatException(status));
2160 break;
2161 }
2162
2163 sc->acpi_sstate = state;
2164
2165 /* Enable any GPEs as appropriate and requested by the user. */
2166 acpi_wake_prep_walk(state);
2167 slp_state = ACPI_SS_GPE_SET;
2168
2169 /*
2170 * Inform all devices that we are going to sleep. If at least one
2171 * device fails, DEVICE_SUSPEND() automatically resumes the tree.
2172 *
2173 * XXX Note that a better two-pass approach with a 'veto' pass
2174 * followed by a "real thing" pass would be better, but the current
2175 * bus interface does not provide for this.
2176 */
2177 if (DEVICE_SUSPEND(root_bus) != 0) {
2178 device_printf(sc->acpi_dev, "device_suspend failed\n");
2179 break;
2180 }
2181 slp_state = ACPI_SS_DEV_SUSPEND;
2182
2183 status = AcpiEnterSleepStatePrep(state);
2184 if (ACPI_FAILURE(status)) {
2185 device_printf(sc->acpi_dev, "AcpiEnterSleepStatePrep failed - %s\n",
2186 AcpiFormatException(status));
2187 break;
2188 }
2189 slp_state = ACPI_SS_SLP_PREP;
2190
2191 if (sc->acpi_sleep_delay > 0)
2192 DELAY(sc->acpi_sleep_delay * 1000000);
2193
2194 if (state != ACPI_STATE_S1) {
2195 acpi_sleep_machdep(sc, state);
2196
2197 /* Re-enable ACPI hardware on wakeup from sleep state 4. */
2198 if (state == ACPI_STATE_S4)
2199 AcpiEnable();
2200 } else {
2201 ACPI_DISABLE_IRQS();
2202 status = AcpiEnterSleepState(state);
2203 if (ACPI_FAILURE(status)) {
2204 device_printf(sc->acpi_dev, "AcpiEnterSleepState failed - %s\n",
2205 AcpiFormatException(status));
2206 break;
2207 }
2208 }
2209 slp_state = ACPI_SS_SLEPT;
2210 break;
2211 case ACPI_STATE_S5:
2212 /*
2213 * Shut down cleanly and power off. This will call us back through the
2214 * shutdown handlers.
2215 */
2216 shutdown_nice(RB_POWEROFF);
2217 break;
2218 case ACPI_STATE_S0:
2219 default:
2220 status = AE_BAD_PARAMETER;
2221 break;
2222 }
2223
2224 /*
2225 * Back out state according to how far along we got in the suspend
2226 * process. This handles both the error and success cases.
2227 */
2228 if (slp_state >= ACPI_SS_GPE_SET) {
2229 acpi_wake_prep_walk(state);
2230 sc->acpi_sstate = ACPI_STATE_S0;
2231 }
2232 if (slp_state >= ACPI_SS_SLP_PREP)
2233 AcpiLeaveSleepState(state);
2234 if (slp_state >= ACPI_SS_DEV_SUSPEND)
2235 DEVICE_RESUME(root_bus);
2236 if (slp_state >= ACPI_SS_SLEPT)
2237 acpi_enable_fixed_events(sc);
2238
2239 /* Allow another sleep request after a while. */
2240 if (state != ACPI_STATE_S5)
2241 timeout(acpi_sleep_enable, (caddr_t)sc, hz * ACPI_MINIMUM_AWAKETIME);
2242
2243 mtx_unlock(&Giant);
2244 return_ACPI_STATUS (status);
2245 }
2246
2247 /* Initialize a device's wake GPE. */
2248 int
2249 acpi_wake_init(device_t dev, int type)
2250 {
2251 struct acpi_prw_data prw;
2252
2253 /* Evaluate _PRW to find the GPE. */
2254 if (acpi_parse_prw(acpi_get_handle(dev), &prw) != 0)
2255 return (ENXIO);
2256
2257 /* Set the requested type for the GPE (runtime, wake, or both). */
2258 if (ACPI_FAILURE(AcpiSetGpeType(prw.gpe_handle, prw.gpe_bit, type))) {
2259 device_printf(dev, "set GPE type failed\n");
2260 return (ENXIO);
2261 }
2262
2263 return (0);
2264 }
2265
2266 /* Enable or disable the device's wake GPE. */
2267 int
2268 acpi_wake_set_enable(device_t dev, int enable)
2269 {
2270 struct acpi_prw_data prw;
2271 ACPI_HANDLE handle;
2272 ACPI_STATUS status;
2273 int flags;
2274
2275 /* Make sure the device supports waking the system and get the GPE. */
2276 handle = acpi_get_handle(dev);
2277 if (acpi_parse_prw(handle, &prw) != 0)
2278 return (ENXIO);
2279
2280 flags = acpi_get_flags(dev);
2281 if (enable) {
2282 status = AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2283 if (ACPI_FAILURE(status)) {
2284 device_printf(dev, "enable wake failed\n");
2285 return (ENXIO);
2286 }
2287 acpi_set_flags(dev, flags | ACPI_FLAG_WAKE_ENABLED);
2288 } else {
2289 status = AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2290 if (ACPI_FAILURE(status)) {
2291 device_printf(dev, "disable wake failed\n");
2292 return (ENXIO);
2293 }
2294 acpi_set_flags(dev, flags & ~ACPI_FLAG_WAKE_ENABLED);
2295 }
2296
2297 return (0);
2298 }
2299
2300 static int
2301 acpi_wake_sleep_prep(ACPI_HANDLE handle, int sstate)
2302 {
2303 struct acpi_prw_data prw;
2304 device_t dev;
2305
2306 /* Check that this is a wake-capable device and get its GPE. */
2307 if (acpi_parse_prw(handle, &prw) != 0)
2308 return (ENXIO);
2309 dev = acpi_get_device(handle);
2310
2311 /*
2312 * The destination sleep state must be less than (i.e., higher power)
2313 * or equal to the value specified by _PRW. If this GPE cannot be
2314 * enabled for the next sleep state, then disable it. If it can and
2315 * the user requested it be enabled, turn on any required power resources
2316 * and set _PSW.
2317 */
2318 if (sstate > prw.lowest_wake) {
2319 AcpiDisableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2320 if (bootverbose)
2321 device_printf(dev, "wake_prep disabled wake for %s (S%d)\n",
2322 acpi_name(handle), sstate);
2323 } else if (dev && (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) != 0) {
2324 acpi_pwr_wake_enable(handle, 1);
2325 acpi_SetInteger(handle, "_PSW", 1);
2326 if (bootverbose)
2327 device_printf(dev, "wake_prep enabled for %s (S%d)\n",
2328 acpi_name(handle), sstate);
2329 }
2330
2331 return (0);
2332 }
2333
2334 static int
2335 acpi_wake_run_prep(ACPI_HANDLE handle, int sstate)
2336 {
2337 struct acpi_prw_data prw;
2338 device_t dev;
2339
2340 /*
2341 * Check that this is a wake-capable device and get its GPE. Return
2342 * now if the user didn't enable this device for wake.
2343 */
2344 if (acpi_parse_prw(handle, &prw) != 0)
2345 return (ENXIO);
2346 dev = acpi_get_device(handle);
2347 if (dev == NULL || (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) == 0)
2348 return (0);
2349
2350 /*
2351 * If this GPE couldn't be enabled for the previous sleep state, it was
2352 * disabled before going to sleep so re-enable it. If it was enabled,
2353 * clear _PSW and turn off any power resources it used.
2354 */
2355 if (sstate > prw.lowest_wake) {
2356 AcpiEnableGpe(prw.gpe_handle, prw.gpe_bit, ACPI_NOT_ISR);
2357 if (bootverbose)
2358 device_printf(dev, "run_prep re-enabled %s\n", acpi_name(handle));
2359 } else {
2360 acpi_SetInteger(handle, "_PSW", 0);
2361 acpi_pwr_wake_enable(handle, 0);
2362 if (bootverbose)
2363 device_printf(dev, "run_prep cleaned up for %s\n",
2364 acpi_name(handle));
2365 }
2366
2367 return (0);
2368 }
2369
2370 static ACPI_STATUS
2371 acpi_wake_prep(ACPI_HANDLE handle, UINT32 level, void *context, void **status)
2372 {
2373 int sstate;
2374
2375 /* If suspending, run the sleep prep function, otherwise wake. */
2376 sstate = *(int *)context;
2377 if (AcpiGbl_SystemAwakeAndRunning)
2378 acpi_wake_sleep_prep(handle, sstate);
2379 else
2380 acpi_wake_run_prep(handle, sstate);
2381 return (AE_OK);
2382 }
2383
2384 /* Walk the tree rooted at acpi0 to prep devices for suspend/resume. */
2385 static int
2386 acpi_wake_prep_walk(int sstate)
2387 {
2388 ACPI_HANDLE sb_handle;
2389
2390 if (ACPI_SUCCESS(AcpiGetHandle(ACPI_ROOT_OBJECT, "\\_SB_", &sb_handle)))
2391 AcpiWalkNamespace(ACPI_TYPE_DEVICE, sb_handle, 100,
2392 acpi_wake_prep, &sstate, NULL);
2393 return (0);
2394 }
2395
2396 /* Walk the tree rooted at acpi0 to attach per-device wake sysctls. */
2397 static int
2398 acpi_wake_sysctl_walk(device_t dev)
2399 {
2400 int error, i, numdevs;
2401 device_t *devlist;
2402 device_t child;
2403 ACPI_STATUS status;
2404
2405 error = device_get_children(dev, &devlist, &numdevs);
2406 if (error != 0 || numdevs == 0) {
2407 if (numdevs == 0)
2408 free(devlist, M_TEMP);
2409 return (error);
2410 }
2411 for (i = 0; i < numdevs; i++) {
2412 child = devlist[i];
2413 acpi_wake_sysctl_walk(child);
2414 if (!device_is_attached(child))
2415 continue;
2416 status = AcpiEvaluateObject(acpi_get_handle(child), "_PRW", NULL, NULL);
2417 if (ACPI_SUCCESS(status)) {
2418 SYSCTL_ADD_PROC(device_get_sysctl_ctx(child),
2419 SYSCTL_CHILDREN(device_get_sysctl_tree(child)), OID_AUTO,
2420 "wake", CTLTYPE_INT | CTLFLAG_RW, child, 0,
2421 acpi_wake_set_sysctl, "I", "Device set to wake the system");
2422 }
2423 }
2424 free(devlist, M_TEMP);
2425
2426 return (0);
2427 }
2428
2429 /* Enable or disable wake from userland. */
2430 static int
2431 acpi_wake_set_sysctl(SYSCTL_HANDLER_ARGS)
2432 {
2433 int enable, error;
2434 device_t dev;
2435
2436 dev = (device_t)arg1;
2437 enable = (acpi_get_flags(dev) & ACPI_FLAG_WAKE_ENABLED) ? 1 : 0;
2438
2439 error = sysctl_handle_int(oidp, &enable, 0, req);
2440 if (error != 0 || req->newptr == NULL)
2441 return (error);
2442 if (enable != 0 && enable != 1)
2443 return (EINVAL);
2444
2445 return (acpi_wake_set_enable(dev, enable));
2446 }
2447
2448 /* Parse a device's _PRW into a structure. */
2449 int
2450 acpi_parse_prw(ACPI_HANDLE h, struct acpi_prw_data *prw)
2451 {
2452 ACPI_STATUS status;
2453 ACPI_BUFFER prw_buffer;
2454 ACPI_OBJECT *res, *res2;
2455 int error, i, power_count;
2456
2457 if (h == NULL || prw == NULL)
2458 return (EINVAL);
2459
2460 /*
2461 * The _PRW object (7.2.9) is only required for devices that have the
2462 * ability to wake the system from a sleeping state.
2463 */
2464 error = EINVAL;
2465 prw_buffer.Pointer = NULL;
2466 prw_buffer.Length = ACPI_ALLOCATE_BUFFER;
2467 status = AcpiEvaluateObject(h, "_PRW", NULL, &prw_buffer);
2468 if (ACPI_FAILURE(status))
2469 return (ENOENT);
2470 res = (ACPI_OBJECT *)prw_buffer.Pointer;
2471 if (res == NULL)
2472 return (ENOENT);
2473 if (!ACPI_PKG_VALID(res, 2))
2474 goto out;
2475
2476 /*
2477 * Element 1 of the _PRW object:
2478 * The lowest power system sleeping state that can be entered while still
2479 * providing wake functionality. The sleeping state being entered must
2480 * be less than (i.e., higher power) or equal to this value.
2481 */
2482 if (acpi_PkgInt32(res, 1, &prw->lowest_wake) != 0)
2483 goto out;
2484
2485 /*
2486 * Element 0 of the _PRW object:
2487 */
2488 switch (res->Package.Elements[0].Type) {
2489 case ACPI_TYPE_INTEGER:
2490 /*
2491 * If the data type of this package element is numeric, then this
2492 * _PRW package element is the bit index in the GPEx_EN, in the
2493 * GPE blocks described in the FADT, of the enable bit that is
2494 * enabled for the wake event.
2495 */
2496 prw->gpe_handle = NULL;
2497 prw->gpe_bit = res->Package.Elements[0].Integer.Value;
2498 error = 0;
2499 break;
2500 case ACPI_TYPE_PACKAGE:
2501 /*
2502 * If the data type of this package element is a package, then this
2503 * _PRW package element is itself a package containing two
2504 * elements. The first is an object reference to the GPE Block
2505 * device that contains the GPE that will be triggered by the wake
2506 * event. The second element is numeric and it contains the bit
2507 * index in the GPEx_EN, in the GPE Block referenced by the
2508 * first element in the package, of the enable bit that is enabled for
2509 * the wake event.
2510 *
2511 * For example, if this field is a package then it is of the form:
2512 * Package() {\_SB.PCI0.ISA.GPE, 2}
2513 */
2514 res2 = &res->Package.Elements[0];
2515 if (!ACPI_PKG_VALID(res2, 2))
2516 goto out;
2517 prw->gpe_handle = acpi_GetReference(NULL, &res2->Package.Elements[0]);
2518 if (prw->gpe_handle == NULL)
2519 goto out;
2520 if (acpi_PkgInt32(res2, 1, &prw->gpe_bit) != 0)
2521 goto out;
2522 error = 0;
2523 break;
2524 default:
2525 goto out;
2526 }
2527
2528 /* Elements 2 to N of the _PRW object are power resources. */
2529 power_count = res->Package.Count - 2;
2530 if (power_count > ACPI_PRW_MAX_POWERRES) {
2531 printf("ACPI device %s has too many power resources\n", acpi_name(h));
2532 power_count = 0;
2533 }
2534 prw->power_res_count = power_count;
2535 for (i = 0; i < power_count; i++)
2536 prw->power_res[i] = res->Package.Elements[i];
2537
2538 out:
2539 if (prw_buffer.Pointer != NULL)
2540 AcpiOsFree(prw_buffer.Pointer);
2541 return (error);
2542 }
2543
2544 /*
2545 * ACPI Event Handlers
2546 */
2547
2548 /* System Event Handlers (registered by EVENTHANDLER_REGISTER) */
2549
2550 static void
2551 acpi_system_eventhandler_sleep(void *arg, int state)
2552 {
2553
2554 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2555
2556 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2557 acpi_SetSleepState((struct acpi_softc *)arg, state);
2558
2559 return_VOID;
2560 }
2561
2562 static void
2563 acpi_system_eventhandler_wakeup(void *arg, int state)
2564 {
2565
2566 ACPI_FUNCTION_TRACE_U32((char *)(uintptr_t)__func__, state);
2567
2568 /* Currently, nothing to do for wakeup. */
2569
2570 return_VOID;
2571 }
2572
2573 /*
2574 * ACPICA Event Handlers (FixedEvent, also called from button notify handler)
2575 */
2576 UINT32
2577 acpi_event_power_button_sleep(void *context)
2578 {
2579 struct acpi_softc *sc = (struct acpi_softc *)context;
2580
2581 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2582
2583 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_power_button_sx);
2584
2585 return_VALUE (ACPI_INTERRUPT_HANDLED);
2586 }
2587
2588 UINT32
2589 acpi_event_power_button_wake(void *context)
2590 {
2591 struct acpi_softc *sc = (struct acpi_softc *)context;
2592
2593 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2594
2595 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_power_button_sx);
2596
2597 return_VALUE (ACPI_INTERRUPT_HANDLED);
2598 }
2599
2600 UINT32
2601 acpi_event_sleep_button_sleep(void *context)
2602 {
2603 struct acpi_softc *sc = (struct acpi_softc *)context;
2604
2605 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2606
2607 EVENTHANDLER_INVOKE(acpi_sleep_event, sc->acpi_sleep_button_sx);
2608
2609 return_VALUE (ACPI_INTERRUPT_HANDLED);
2610 }
2611
2612 UINT32
2613 acpi_event_sleep_button_wake(void *context)
2614 {
2615 struct acpi_softc *sc = (struct acpi_softc *)context;
2616
2617 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
2618
2619 EVENTHANDLER_INVOKE(acpi_wakeup_event, sc->acpi_sleep_button_sx);
2620
2621 return_VALUE (ACPI_INTERRUPT_HANDLED);
2622 }
2623
2624 /*
2625 * XXX This static buffer is suboptimal. There is no locking so only
2626 * use this for single-threaded callers.
2627 */
2628 char *
2629 acpi_name(ACPI_HANDLE handle)
2630 {
2631 ACPI_BUFFER buf;
2632 static char data[256];
2633
2634 buf.Length = sizeof(data);
2635 buf.Pointer = data;
2636
2637 if (handle && ACPI_SUCCESS(AcpiGetName(handle, ACPI_FULL_PATHNAME, &buf)))
2638 return (data);
2639 return ("(unknown)");
2640 }
2641
2642 /*
2643 * Debugging/bug-avoidance. Avoid trying to fetch info on various
2644 * parts of the namespace.
2645 */
2646 int
2647 acpi_avoid(ACPI_HANDLE handle)
2648 {
2649 char *cp, *env, *np;
2650 int len;
2651
2652 np = acpi_name(handle);
2653 if (*np == '\\')
2654 np++;
2655 if ((env = getenv("debug.acpi.avoid")) == NULL)
2656 return (0);
2657
2658 /* Scan the avoid list checking for a match */
2659 cp = env;
2660 for (;;) {
2661 while (*cp != 0 && isspace(*cp))
2662 cp++;
2663 if (*cp == 0)
2664 break;
2665 len = 0;
2666 while (cp[len] != 0 && !isspace(cp[len]))
2667 len++;
2668 if (!strncmp(cp, np, len)) {
2669 freeenv(env);
2670 return(1);
2671 }
2672 cp += len;
2673 }
2674 freeenv(env);
2675
2676 return (0);
2677 }
2678
2679 /*
2680 * Debugging/bug-avoidance. Disable ACPI subsystem components.
2681 */
2682 int
2683 acpi_disabled(char *subsys)
2684 {
2685 char *cp, *env;
2686 int len;
2687
2688 if ((env = getenv("debug.acpi.disabled")) == NULL)
2689 return (0);
2690 if (strcmp(env, "all") == 0) {
2691 freeenv(env);
2692 return (1);
2693 }
2694
2695 /* Scan the disable list, checking for a match. */
2696 cp = env;
2697 for (;;) {
2698 while (*cp != '\0' && isspace(*cp))
2699 cp++;
2700 if (*cp == '\0')
2701 break;
2702 len = 0;
2703 while (cp[len] != '\0' && !isspace(cp[len]))
2704 len++;
2705 if (strncmp(cp, subsys, len) == 0) {
2706 freeenv(env);
2707 return (1);
2708 }
2709 cp += len;
2710 }
2711 freeenv(env);
2712
2713 return (0);
2714 }
2715
2716 /*
2717 * Control interface.
2718 *
2719 * We multiplex ioctls for all participating ACPI devices here. Individual
2720 * drivers wanting to be accessible via /dev/acpi should use the
2721 * register/deregister interface to make their handlers visible.
2722 */
2723 struct acpi_ioctl_hook
2724 {
2725 TAILQ_ENTRY(acpi_ioctl_hook) link;
2726 u_long cmd;
2727 acpi_ioctl_fn fn;
2728 void *arg;
2729 };
2730
2731 static TAILQ_HEAD(,acpi_ioctl_hook) acpi_ioctl_hooks;
2732 static int acpi_ioctl_hooks_initted;
2733
2734 int
2735 acpi_register_ioctl(u_long cmd, acpi_ioctl_fn fn, void *arg)
2736 {
2737 struct acpi_ioctl_hook *hp;
2738
2739 if ((hp = malloc(sizeof(*hp), M_ACPIDEV, M_NOWAIT)) == NULL)
2740 return (ENOMEM);
2741 hp->cmd = cmd;
2742 hp->fn = fn;
2743 hp->arg = arg;
2744
2745 ACPI_LOCK(acpi);
2746 if (acpi_ioctl_hooks_initted == 0) {
2747 TAILQ_INIT(&acpi_ioctl_hooks);
2748 acpi_ioctl_hooks_initted = 1;
2749 }
2750 TAILQ_INSERT_TAIL(&acpi_ioctl_hooks, hp, link);
2751 ACPI_UNLOCK(acpi);
2752
2753 return (0);
2754 }
2755
2756 void
2757 acpi_deregister_ioctl(u_long cmd, acpi_ioctl_fn fn)
2758 {
2759 struct acpi_ioctl_hook *hp;
2760
2761 ACPI_LOCK(acpi);
2762 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link)
2763 if (hp->cmd == cmd && hp->fn == fn)
2764 break;
2765
2766 if (hp != NULL) {
2767 TAILQ_REMOVE(&acpi_ioctl_hooks, hp, link);
2768 free(hp, M_ACPIDEV);
2769 }
2770 ACPI_UNLOCK(acpi);
2771 }
2772
2773 static int
2774 acpiopen(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2775 {
2776 return (0);
2777 }
2778
2779 static int
2780 acpiclose(struct cdev *dev, int flag, int fmt, d_thread_t *td)
2781 {
2782 return (0);
2783 }
2784
2785 static int
2786 acpiioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td)
2787 {
2788 struct acpi_softc *sc;
2789 struct acpi_ioctl_hook *hp;
2790 int error, state;
2791
2792 error = 0;
2793 hp = NULL;
2794 sc = dev->si_drv1;
2795
2796 /*
2797 * Scan the list of registered ioctls, looking for handlers.
2798 */
2799 ACPI_LOCK(acpi);
2800 if (acpi_ioctl_hooks_initted)
2801 TAILQ_FOREACH(hp, &acpi_ioctl_hooks, link) {
2802 if (hp->cmd == cmd)
2803 break;
2804 }
2805 ACPI_UNLOCK(acpi);
2806 if (hp)
2807 return (hp->fn(cmd, addr, hp->arg));
2808
2809 /*
2810 * Core ioctls are not permitted for non-writable user.
2811 * Currently, other ioctls just fetch information.
2812 * Not changing system behavior.
2813 */
2814 if ((flag & FWRITE) == 0)
2815 return (EPERM);
2816
2817 /* Core system ioctls. */
2818 switch (cmd) {
2819 case ACPIIO_SETSLPSTATE:
2820 error = EINVAL;
2821 state = *(int *)addr;
2822 if (state >= ACPI_STATE_S0 && state <= ACPI_S_STATES_MAX)
2823 if (ACPI_SUCCESS(acpi_SetSleepState(sc, state)))
2824 error = 0;
2825 break;
2826 default:
2827 error = ENXIO;
2828 break;
2829 }
2830
2831 return (error);
2832 }
2833
2834 static int
2835 acpi_supported_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2836 {
2837 int error;
2838 struct sbuf sb;
2839 UINT8 state, TypeA, TypeB;
2840
2841 sbuf_new(&sb, NULL, 32, SBUF_AUTOEXTEND);
2842 for (state = ACPI_STATE_S1; state < ACPI_S_STATES_MAX + 1; state++)
2843 if (ACPI_SUCCESS(AcpiGetSleepTypeData(state, &TypeA, &TypeB)))
2844 sbuf_printf(&sb, "S%d ", state);
2845 sbuf_trim(&sb);
2846 sbuf_finish(&sb);
2847 error = sysctl_handle_string(oidp, sbuf_data(&sb), sbuf_len(&sb), req);
2848 sbuf_delete(&sb);
2849 return (error);
2850 }
2851
2852 static int
2853 acpi_sleep_state_sysctl(SYSCTL_HANDLER_ARGS)
2854 {
2855 char sleep_state[10];
2856 int error;
2857 u_int new_state, old_state;
2858
2859 old_state = *(u_int *)oidp->oid_arg1;
2860 if (old_state > ACPI_S_STATES_MAX + 1)
2861 strlcpy(sleep_state, "unknown", sizeof(sleep_state));
2862 else
2863 strlcpy(sleep_state, sleep_state_names[old_state], sizeof(sleep_state));
2864 error = sysctl_handle_string(oidp, sleep_state, sizeof(sleep_state), req);
2865 if (error == 0 && req->newptr != NULL) {
2866 new_state = ACPI_STATE_S0;
2867 for (; new_state <= ACPI_S_STATES_MAX + 1; new_state++)
2868 if (strcmp(sleep_state, sleep_state_names[new_state]) == 0)
2869 break;
2870 if (new_state <= ACPI_S_STATES_MAX + 1) {
2871 if (new_state != old_state)
2872 *(u_int *)oidp->oid_arg1 = new_state;
2873 } else
2874 error = EINVAL;
2875 }
2876
2877 return (error);
2878 }
2879
2880 /* Inform devctl(4) when we receive a Notify. */
2881 void
2882 acpi_UserNotify(const char *subsystem, ACPI_HANDLE h, uint8_t notify)
2883 {
2884 char notify_buf[16];
2885 ACPI_BUFFER handle_buf;
2886 ACPI_STATUS status;
2887
2888 if (subsystem == NULL)
2889 return;
2890
2891 handle_buf.Pointer = NULL;
2892 handle_buf.Length = ACPI_ALLOCATE_BUFFER;
2893 status = AcpiNsHandleToPathname(h, &handle_buf);
2894 if (ACPI_FAILURE(status))
2895 return;
2896 snprintf(notify_buf, sizeof(notify_buf), "notify=0x%02x", notify);
2897 devctl_notify("ACPI", subsystem, handle_buf.Pointer, notify_buf);
2898 AcpiOsFree(handle_buf.Pointer);
2899 }
2900
2901 #ifdef ACPI_DEBUG
2902 /*
2903 * Support for parsing debug options from the kernel environment.
2904 *
2905 * Bits may be set in the AcpiDbgLayer and AcpiDbgLevel debug registers
2906 * by specifying the names of the bits in the debug.acpi.layer and
2907 * debug.acpi.level environment variables. Bits may be unset by
2908 * prefixing the bit name with !.
2909 */
2910 struct debugtag
2911 {
2912 char *name;
2913 UINT32 value;
2914 };
2915
2916 static struct debugtag dbg_layer[] = {
2917 {"ACPI_UTILITIES", ACPI_UTILITIES},
2918 {"ACPI_HARDWARE", ACPI_HARDWARE},
2919 {"ACPI_EVENTS", ACPI_EVENTS},
2920 {"ACPI_TABLES", ACPI_TABLES},
2921 {"ACPI_NAMESPACE", ACPI_NAMESPACE},
2922 {"ACPI_PARSER", ACPI_PARSER},
2923 {"ACPI_DISPATCHER", ACPI_DISPATCHER},
2924 {"ACPI_EXECUTER", ACPI_EXECUTER},
2925 {"ACPI_RESOURCES", ACPI_RESOURCES},
2926 {"ACPI_CA_DEBUGGER", ACPI_CA_DEBUGGER},
2927 {"ACPI_OS_SERVICES", ACPI_OS_SERVICES},
2928 {"ACPI_CA_DISASSEMBLER", ACPI_CA_DISASSEMBLER},
2929 {"ACPI_ALL_COMPONENTS", ACPI_ALL_COMPONENTS},
2930
2931 {"ACPI_AC_ADAPTER", ACPI_AC_ADAPTER},
2932 {"ACPI_BATTERY", ACPI_BATTERY},
2933 {"ACPI_BUS", ACPI_BUS},
2934 {"ACPI_BUTTON", ACPI_BUTTON},
2935 {"ACPI_EC", ACPI_EC},
2936 {"ACPI_FAN", ACPI_FAN},
2937 {"ACPI_POWERRES", ACPI_POWERRES},
2938 {"ACPI_PROCESSOR", ACPI_PROCESSOR},
2939 {"ACPI_THERMAL", ACPI_THERMAL},
2940 {"ACPI_TIMER", ACPI_TIMER},
2941 {"ACPI_ALL_DRIVERS", ACPI_ALL_DRIVERS},
2942 {NULL, 0}
2943 };
2944
2945 static struct debugtag dbg_level[] = {
2946 {"ACPI_LV_ERROR", ACPI_LV_ERROR},
2947 {"ACPI_LV_WARN", ACPI_LV_WARN},
2948 {"ACPI_LV_INIT", ACPI_LV_INIT},
2949 {"ACPI_LV_DEBUG_OBJECT", ACPI_LV_DEBUG_OBJECT},
2950 {"ACPI_LV_INFO", ACPI_LV_INFO},
2951 {"ACPI_LV_ALL_EXCEPTIONS", ACPI_LV_ALL_EXCEPTIONS},
2952
2953 /* Trace verbosity level 1 [Standard Trace Level] */
2954 {"ACPI_LV_INIT_NAMES", ACPI_LV_INIT_NAMES},
2955 {"ACPI_LV_PARSE", ACPI_LV_PARSE},
2956 {"ACPI_LV_LOAD", ACPI_LV_LOAD},
2957 {"ACPI_LV_DISPATCH", ACPI_LV_DISPATCH},
2958 {"ACPI_LV_EXEC", ACPI_LV_EXEC},
2959 {"ACPI_LV_NAMES", ACPI_LV_NAMES},
2960 {"ACPI_LV_OPREGION", ACPI_LV_OPREGION},
2961 {"ACPI_LV_BFIELD", ACPI_LV_BFIELD},
2962 {"ACPI_LV_TABLES", ACPI_LV_TABLES},
2963 {"ACPI_LV_VALUES", ACPI_LV_VALUES},
2964 {"ACPI_LV_OBJECTS", ACPI_LV_OBJECTS},
2965 {"ACPI_LV_RESOURCES", ACPI_LV_RESOURCES},
2966 {"ACPI_LV_USER_REQUESTS", ACPI_LV_USER_REQUESTS},
2967 {"ACPI_LV_PACKAGE", ACPI_LV_PACKAGE},
2968 {"ACPI_LV_VERBOSITY1", ACPI_LV_VERBOSITY1},
2969
2970 /* Trace verbosity level 2 [Function tracing and memory allocation] */
2971 {"ACPI_LV_ALLOCATIONS", ACPI_LV_ALLOCATIONS},
2972 {"ACPI_LV_FUNCTIONS", ACPI_LV_FUNCTIONS},
2973 {"ACPI_LV_OPTIMIZATIONS", ACPI_LV_OPTIMIZATIONS},
2974 {"ACPI_LV_VERBOSITY2", ACPI_LV_VERBOSITY2},
2975 {"ACPI_LV_ALL", ACPI_LV_ALL},
2976
2977 /* Trace verbosity level 3 [Threading, I/O, and Interrupts] */
2978 {"ACPI_LV_MUTEX", ACPI_LV_MUTEX},
2979 {"ACPI_LV_THREADS", ACPI_LV_THREADS},
2980 {"ACPI_LV_IO", ACPI_LV_IO},
2981 {"ACPI_LV_INTERRUPTS", ACPI_LV_INTERRUPTS},
2982 {"ACPI_LV_VERBOSITY3", ACPI_LV_VERBOSITY3},
2983
2984 /* Exceptionally verbose output -- also used in the global "DebugLevel" */
2985 {"ACPI_LV_AML_DISASSEMBLE", ACPI_LV_AML_DISASSEMBLE},
2986 {"ACPI_LV_VERBOSE_INFO", ACPI_LV_VERBOSE_INFO},
2987 {"ACPI_LV_FULL_TABLES", ACPI_LV_FULL_TABLES},
2988 {"ACPI_LV_EVENTS", ACPI_LV_EVENTS},
2989 {"ACPI_LV_VERBOSE", ACPI_LV_VERBOSE},
2990 {NULL, 0}
2991 };
2992
2993 static void
2994 acpi_parse_debug(char *cp, struct debugtag *tag, UINT32 *flag)
2995 {
2996 char *ep;
2997 int i, l;
2998 int set;
2999
3000 while (*cp) {
3001 if (isspace(*cp)) {
3002 cp++;
3003 continue;
3004 }
3005 ep = cp;
3006 while (*ep && !isspace(*ep))
3007 ep++;
3008 if (*cp == '!') {
3009 set = 0;
3010 cp++;
3011 if (cp == ep)
3012 continue;
3013 } else {
3014 set = 1;
3015 }
3016 l = ep - cp;
3017 for (i = 0; tag[i].name != NULL; i++) {
3018 if (!strncmp(cp, tag[i].name, l)) {
3019 if (set)
3020 *flag |= tag[i].value;
3021 else
3022 *flag &= ~tag[i].value;
3023 }
3024 }
3025 cp = ep;
3026 }
3027 }
3028
3029 static void
3030 acpi_set_debugging(void *junk)
3031 {
3032 char *layer, *level;
3033
3034 if (cold) {
3035 AcpiDbgLayer = 0;
3036 AcpiDbgLevel = 0;
3037 }
3038
3039 layer = getenv("debug.acpi.layer");
3040 level = getenv("debug.acpi.level");
3041 if (layer == NULL && level == NULL)
3042 return;
3043
3044 printf("ACPI set debug");
3045 if (layer != NULL) {
3046 if (strcmp("NONE", layer) != 0)
3047 printf(" layer '%s'", layer);
3048 acpi_parse_debug(layer, &dbg_layer[0], &AcpiDbgLayer);
3049 freeenv(layer);
3050 }
3051 if (level != NULL) {
3052 if (strcmp("NONE", level) != 0)
3053 printf(" level '%s'", level);
3054 acpi_parse_debug(level, &dbg_level[0], &AcpiDbgLevel);
3055 freeenv(level);
3056 }
3057 printf("\n");
3058 }
3059
3060 SYSINIT(acpi_debugging, SI_SUB_TUNABLES, SI_ORDER_ANY, acpi_set_debugging,
3061 NULL);
3062
3063 static int
3064 acpi_debug_sysctl(SYSCTL_HANDLER_ARGS)
3065 {
3066 int error, *dbg;
3067 struct debugtag *tag;
3068 struct sbuf sb;
3069
3070 if (sbuf_new(&sb, NULL, 128, SBUF_AUTOEXTEND) == NULL)
3071 return (ENOMEM);
3072 if (strcmp(oidp->oid_arg1, "debug.acpi.layer") == 0) {
3073 tag = &dbg_layer[0];
3074 dbg = &AcpiDbgLayer;
3075 } else {
3076 tag = &dbg_level[0];
3077 dbg = &AcpiDbgLevel;
3078 }
3079
3080 /* Get old values if this is a get request. */
3081 ACPI_SERIAL_BEGIN(acpi);
3082 if (*dbg == 0) {
3083 sbuf_cpy(&sb, "NONE");
3084 } else if (req->newptr == NULL) {
3085 for (; tag->name != NULL; tag++) {
3086 if ((*dbg & tag->value) == tag->value)
3087 sbuf_printf(&sb, "%s ", tag->name);
3088 }
3089 }
3090 sbuf_trim(&sb);
3091 sbuf_finish(&sb);
3092
3093 /* Copy out the old values to the user. */
3094 error = SYSCTL_OUT(req, sbuf_data(&sb), sbuf_len(&sb));
3095 sbuf_delete(&sb);
3096
3097 /* If the user is setting a string, parse it. */
3098 if (error == 0 && req->newptr != NULL) {
3099 *dbg = 0;
3100 setenv((char *)oidp->oid_arg1, (char *)req->newptr);
3101 acpi_set_debugging(NULL);
3102 }
3103 ACPI_SERIAL_END(acpi);
3104
3105 return (error);
3106 }
3107
3108 SYSCTL_PROC(_debug_acpi, OID_AUTO, layer, CTLFLAG_RW | CTLTYPE_STRING,
3109 "debug.acpi.layer", 0, acpi_debug_sysctl, "A", "");
3110 SYSCTL_PROC(_debug_acpi, OID_AUTO, level, CTLFLAG_RW | CTLTYPE_STRING,
3111 "debug.acpi.level", 0, acpi_debug_sysctl, "A", "");
3112 #endif /* ACPI_DEBUG */
3113
3114 static int
3115 acpi_pm_func(u_long cmd, void *arg, ...)
3116 {
3117 int state, acpi_state;
3118 int error;
3119 struct acpi_softc *sc;
3120 va_list ap;
3121
3122 error = 0;
3123 switch (cmd) {
3124 case POWER_CMD_SUSPEND:
3125 sc = (struct acpi_softc *)arg;
3126 if (sc == NULL) {
3127 error = EINVAL;
3128 goto out;
3129 }
3130
3131 va_start(ap, arg);
3132 state = va_arg(ap, int);
3133 va_end(ap);
3134
3135 switch (state) {
3136 case POWER_SLEEP_STATE_STANDBY:
3137 acpi_state = sc->acpi_standby_sx;
3138 break;
3139 case POWER_SLEEP_STATE_SUSPEND:
3140 acpi_state = sc->acpi_suspend_sx;
3141 break;
3142 case POWER_SLEEP_STATE_HIBERNATE:
3143 acpi_state = ACPI_STATE_S4;
3144 break;
3145 default:
3146 error = EINVAL;
3147 goto out;
3148 }
3149
3150 acpi_SetSleepState(sc, acpi_state);
3151 break;
3152 default:
3153 error = EINVAL;
3154 goto out;
3155 }
3156
3157 out:
3158 return (error);
3159 }
3160
3161 static void
3162 acpi_pm_register(void *arg)
3163 {
3164 if (!cold || resource_disabled("acpi", 0))
3165 return;
3166
3167 power_pm_register(POWER_PM_TYPE_ACPI, acpi_pm_func, NULL);
3168 }
3169
3170 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, acpi_pm_register, 0);
Cache object: 17fef18b64eab7721acc2368c1ee1394
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